drivers/platform/x86/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.23"
  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  ****************************************************************************
1606  *
1607  * Subdrivers
1608  *
1609  ****************************************************************************
1610  ****************************************************************************/
1611
1612 /*************************************************************************
1613  * thinkpad-acpi init subdriver
1614  */
1615
1616 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1617 {
1618         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1619         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1620
1621         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1622                 (thinkpad_id.bios_version_str) ?
1623                         thinkpad_id.bios_version_str : "unknown",
1624                 (thinkpad_id.ec_version_str) ?
1625                         thinkpad_id.ec_version_str : "unknown");
1626
1627         if (thinkpad_id.vendor && thinkpad_id.model_str)
1628                 printk(TPACPI_INFO "%s %s, model %s\n",
1629                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1630                                 "IBM" : ((thinkpad_id.vendor ==
1631                                                 PCI_VENDOR_ID_LENOVO) ?
1632                                         "Lenovo" : "Unknown vendor"),
1633                         thinkpad_id.model_str,
1634                         (thinkpad_id.nummodel_str) ?
1635                                 thinkpad_id.nummodel_str : "unknown");
1636
1637         return 0;
1638 }
1639
1640 static int thinkpad_acpi_driver_read(char *p)
1641 {
1642         int len = 0;
1643
1644         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1645         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1646
1647         return len;
1648 }
1649
1650 static struct ibm_struct thinkpad_acpi_driver_data = {
1651         .name = "driver",
1652         .read = thinkpad_acpi_driver_read,
1653 };
1654
1655 /*************************************************************************
1656  * Hotkey subdriver
1657  */
1658
1659 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1660         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1661         TP_ACPI_HOTKEYSCAN_FNF2,
1662         TP_ACPI_HOTKEYSCAN_FNF3,
1663         TP_ACPI_HOTKEYSCAN_FNF4,
1664         TP_ACPI_HOTKEYSCAN_FNF5,
1665         TP_ACPI_HOTKEYSCAN_FNF6,
1666         TP_ACPI_HOTKEYSCAN_FNF7,
1667         TP_ACPI_HOTKEYSCAN_FNF8,
1668         TP_ACPI_HOTKEYSCAN_FNF9,
1669         TP_ACPI_HOTKEYSCAN_FNF10,
1670         TP_ACPI_HOTKEYSCAN_FNF11,
1671         TP_ACPI_HOTKEYSCAN_FNF12,
1672         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1673         TP_ACPI_HOTKEYSCAN_FNINSERT,
1674         TP_ACPI_HOTKEYSCAN_FNDELETE,
1675         TP_ACPI_HOTKEYSCAN_FNHOME,
1676         TP_ACPI_HOTKEYSCAN_FNEND,
1677         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1678         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1679         TP_ACPI_HOTKEYSCAN_FNSPACE,
1680         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1681         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1682         TP_ACPI_HOTKEYSCAN_MUTE,
1683         TP_ACPI_HOTKEYSCAN_THINKPAD,
1684 };
1685
1686 enum {  /* Keys available through NVRAM polling */
1687         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1688         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1689 };
1690
1691 enum {  /* Positions of some of the keys in hotkey masks */
1692         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1693         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1694         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1695         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1696         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1697         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1698         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1699         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1700         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1701         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1702         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1703 };
1704
1705 enum {  /* NVRAM to ACPI HKEY group map */
1706         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1707                                           TP_ACPI_HKEY_ZOOM_MASK |
1708                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1709                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1710         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1711                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1712         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1713                                           TP_ACPI_HKEY_VOLDWN_MASK |
1714                                           TP_ACPI_HKEY_MUTE_MASK,
1715 };
1716
1717 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1718 struct tp_nvram_state {
1719        u16 thinkpad_toggle:1;
1720        u16 zoom_toggle:1;
1721        u16 display_toggle:1;
1722        u16 thinklight_toggle:1;
1723        u16 hibernate_toggle:1;
1724        u16 displayexp_toggle:1;
1725        u16 display_state:1;
1726        u16 brightness_toggle:1;
1727        u16 volume_toggle:1;
1728        u16 mute:1;
1729
1730        u8 brightness_level;
1731        u8 volume_level;
1732 };
1733
1734 static struct task_struct *tpacpi_hotkey_task;
1735 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1736 static int hotkey_poll_freq = 10;       /* Hz */
1737 static struct mutex hotkey_thread_mutex;
1738 static struct mutex hotkey_thread_data_mutex;
1739 static unsigned int hotkey_config_change;
1740
1741 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1742
1743 #define hotkey_source_mask 0U
1744
1745 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1746
1747 static struct mutex hotkey_mutex;
1748
1749 static enum {   /* Reasons for waking up */
1750         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1751         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1752         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1753 } hotkey_wakeup_reason;
1754
1755 static int hotkey_autosleep_ack;
1756
1757 static u32 hotkey_orig_mask;
1758 static u32 hotkey_all_mask;
1759 static u32 hotkey_reserved_mask;
1760 static u32 hotkey_mask;
1761
1762 static unsigned int hotkey_report_mode;
1763
1764 static u16 *hotkey_keycode_map;
1765
1766 static struct attribute_set *hotkey_dev_attributes;
1767
1768 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1769 #define HOTKEY_CONFIG_CRITICAL_START \
1770         do { \
1771                 mutex_lock(&hotkey_thread_data_mutex); \
1772                 hotkey_config_change++; \
1773         } while (0);
1774 #define HOTKEY_CONFIG_CRITICAL_END \
1775         mutex_unlock(&hotkey_thread_data_mutex);
1776 #else
1777 #define HOTKEY_CONFIG_CRITICAL_START
1778 #define HOTKEY_CONFIG_CRITICAL_END
1779 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1780
1781 /* HKEY.MHKG() return bits */
1782 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1783
1784 static int hotkey_get_wlsw(void)
1785 {
1786         int status;
1787
1788         if (!tp_features.hotkey_wlsw)
1789                 return -ENODEV;
1790
1791 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1792         if (dbg_wlswemul)
1793                 return (tpacpi_wlsw_emulstate) ?
1794                                 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1795 #endif
1796
1797         if (!acpi_evalf(hkey_handle, &status, "WLSW", "d"))
1798                 return -EIO;
1799
1800         return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
1801 }
1802
1803 static int hotkey_get_tablet_mode(int *status)
1804 {
1805         int s;
1806
1807         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1808                 return -EIO;
1809
1810         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1811         return 0;
1812 }
1813
1814 /*
1815  * Call with hotkey_mutex held
1816  */
1817 static int hotkey_mask_get(void)
1818 {
1819         u32 m = 0;
1820
1821         if (tp_features.hotkey_mask) {
1822                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1823                         return -EIO;
1824         }
1825         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1826
1827         return 0;
1828 }
1829
1830 /*
1831  * Call with hotkey_mutex held
1832  */
1833 static int hotkey_mask_set(u32 mask)
1834 {
1835         int i;
1836         int rc = 0;
1837
1838         if (tp_features.hotkey_mask) {
1839                 if (!tp_warned.hotkey_mask_ff &&
1840                     (mask == 0xffff || mask == 0xffffff ||
1841                      mask == 0xffffffff)) {
1842                         tp_warned.hotkey_mask_ff = 1;
1843                         printk(TPACPI_NOTICE
1844                                "setting the hotkey mask to 0x%08x is likely "
1845                                "not the best way to go about it\n", mask);
1846                         printk(TPACPI_NOTICE
1847                                "please consider using the driver defaults, "
1848                                "and refer to up-to-date thinkpad-acpi "
1849                                "documentation\n");
1850                 }
1851
1852                 HOTKEY_CONFIG_CRITICAL_START
1853                 for (i = 0; i < 32; i++) {
1854                         u32 m = 1 << i;
1855                         /* enable in firmware mask only keys not in NVRAM
1856                          * mode, but enable the key in the cached hotkey_mask
1857                          * regardless of mode, or the key will end up
1858                          * disabled by hotkey_mask_get() */
1859                         if (!acpi_evalf(hkey_handle,
1860                                         NULL, "MHKM", "vdd", i + 1,
1861                                         !!((mask & ~hotkey_source_mask) & m))) {
1862                                 rc = -EIO;
1863                                 break;
1864                         } else {
1865                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1866                         }
1867                 }
1868                 HOTKEY_CONFIG_CRITICAL_END
1869
1870                 /* hotkey_mask_get must be called unconditionally below */
1871                 if (!hotkey_mask_get() && !rc &&
1872                     (hotkey_mask & ~hotkey_source_mask) !=
1873                      (mask & ~hotkey_source_mask)) {
1874                         printk(TPACPI_NOTICE
1875                                "requested hot key mask 0x%08x, but "
1876                                "firmware forced it to 0x%08x\n",
1877                                mask, hotkey_mask);
1878                 }
1879         } else {
1880 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1881                 HOTKEY_CONFIG_CRITICAL_START
1882                 hotkey_mask = mask & hotkey_source_mask;
1883                 HOTKEY_CONFIG_CRITICAL_END
1884                 hotkey_mask_get();
1885                 if (hotkey_mask != mask) {
1886                         printk(TPACPI_NOTICE
1887                                "requested hot key mask 0x%08x, "
1888                                "forced to 0x%08x (NVRAM poll mask is "
1889                                "0x%08x): no firmware mask support\n",
1890                                mask, hotkey_mask, hotkey_source_mask);
1891                 }
1892 #else
1893                 hotkey_mask_get();
1894                 rc = -ENXIO;
1895 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1896         }
1897
1898         return rc;
1899 }
1900
1901 static int hotkey_status_get(int *status)
1902 {
1903         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1904                 return -EIO;
1905
1906         return 0;
1907 }
1908
1909 static int hotkey_status_set(bool enable)
1910 {
1911         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1912                 return -EIO;
1913
1914         return 0;
1915 }
1916
1917 static void tpacpi_input_send_tabletsw(void)
1918 {
1919         int state;
1920
1921         if (tp_features.hotkey_tablet &&
1922             !hotkey_get_tablet_mode(&state)) {
1923                 mutex_lock(&tpacpi_inputdev_send_mutex);
1924
1925                 input_report_switch(tpacpi_inputdev,
1926                                     SW_TABLET_MODE, !!state);
1927                 input_sync(tpacpi_inputdev);
1928
1929                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1930         }
1931 }
1932
1933 static void tpacpi_input_send_key(unsigned int scancode)
1934 {
1935         unsigned int keycode;
1936
1937         keycode = hotkey_keycode_map[scancode];
1938
1939         if (keycode != KEY_RESERVED) {
1940                 mutex_lock(&tpacpi_inputdev_send_mutex);
1941
1942                 input_report_key(tpacpi_inputdev, keycode, 1);
1943                 if (keycode == KEY_UNKNOWN)
1944                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1945                                     scancode);
1946                 input_sync(tpacpi_inputdev);
1947
1948                 input_report_key(tpacpi_inputdev, keycode, 0);
1949                 if (keycode == KEY_UNKNOWN)
1950                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1951                                     scancode);
1952                 input_sync(tpacpi_inputdev);
1953
1954                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1955         }
1956 }
1957
1958 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1959 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1960
1961 static void tpacpi_hotkey_send_key(unsigned int scancode)
1962 {
1963         tpacpi_input_send_key(scancode);
1964         if (hotkey_report_mode < 2) {
1965                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1966                                                 0x80, 0x1001 + scancode);
1967         }
1968 }
1969
1970 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1971 {
1972         u8 d;
1973
1974         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1975                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1976                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1977                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1978                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1979                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1980         }
1981         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1982                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1983                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1984         }
1985         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1986                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1987                 n->displayexp_toggle =
1988                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1989         }
1990         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1991                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1992                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1993                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1994                 n->brightness_toggle =
1995                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1996         }
1997         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1998                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1999                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
2000                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
2001                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
2002                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
2003         }
2004 }
2005
2006 #define TPACPI_COMPARE_KEY(__scancode, __member) \
2007         do { \
2008                 if ((mask & (1 << __scancode)) && \
2009                     oldn->__member != newn->__member) \
2010                 tpacpi_hotkey_send_key(__scancode); \
2011         } while (0)
2012
2013 #define TPACPI_MAY_SEND_KEY(__scancode) \
2014         do { if (mask & (1 << __scancode)) \
2015                 tpacpi_hotkey_send_key(__scancode); } while (0)
2016
2017 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
2018                                            struct tp_nvram_state *newn,
2019                                            u32 mask)
2020 {
2021         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
2022         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
2023         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
2024         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
2025
2026         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
2027
2028         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
2029
2030         /* handle volume */
2031         if (oldn->volume_toggle != newn->volume_toggle) {
2032                 if (oldn->mute != newn->mute) {
2033                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2034                 }
2035                 if (oldn->volume_level > newn->volume_level) {
2036                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2037                 } else if (oldn->volume_level < newn->volume_level) {
2038                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2039                 } else if (oldn->mute == newn->mute) {
2040                         /* repeated key presses that didn't change state */
2041                         if (newn->mute) {
2042                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
2043                         } else if (newn->volume_level != 0) {
2044                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
2045                         } else {
2046                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
2047                         }
2048                 }
2049         }
2050
2051         /* handle brightness */
2052         if (oldn->brightness_toggle != newn->brightness_toggle) {
2053                 if (oldn->brightness_level < newn->brightness_level) {
2054                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2055                 } else if (oldn->brightness_level > newn->brightness_level) {
2056                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2057                 } else {
2058                         /* repeated key presses that didn't change state */
2059                         if (newn->brightness_level != 0) {
2060                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
2061                         } else {
2062                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
2063                         }
2064                 }
2065         }
2066 }
2067
2068 #undef TPACPI_COMPARE_KEY
2069 #undef TPACPI_MAY_SEND_KEY
2070
2071 static int hotkey_kthread(void *data)
2072 {
2073         struct tp_nvram_state s[2];
2074         u32 mask;
2075         unsigned int si, so;
2076         unsigned long t;
2077         unsigned int change_detector, must_reset;
2078
2079         mutex_lock(&hotkey_thread_mutex);
2080
2081         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
2082                 goto exit;
2083
2084         set_freezable();
2085
2086         so = 0;
2087         si = 1;
2088         t = 0;
2089
2090         /* Initial state for compares */
2091         mutex_lock(&hotkey_thread_data_mutex);
2092         change_detector = hotkey_config_change;
2093         mask = hotkey_source_mask & hotkey_mask;
2094         mutex_unlock(&hotkey_thread_data_mutex);
2095         hotkey_read_nvram(&s[so], mask);
2096
2097         while (!kthread_should_stop() && hotkey_poll_freq) {
2098                 if (t == 0)
2099                         t = 1000/hotkey_poll_freq;
2100                 t = msleep_interruptible(t);
2101                 if (unlikely(kthread_should_stop()))
2102                         break;
2103                 must_reset = try_to_freeze();
2104                 if (t > 0 && !must_reset)
2105                         continue;
2106
2107                 mutex_lock(&hotkey_thread_data_mutex);
2108                 if (must_reset || hotkey_config_change != change_detector) {
2109                         /* forget old state on thaw or config change */
2110                         si = so;
2111                         t = 0;
2112                         change_detector = hotkey_config_change;
2113                 }
2114                 mask = hotkey_source_mask & hotkey_mask;
2115                 mutex_unlock(&hotkey_thread_data_mutex);
2116
2117                 if (likely(mask)) {
2118                         hotkey_read_nvram(&s[si], mask);
2119                         if (likely(si != so)) {
2120                                 hotkey_compare_and_issue_event(&s[so], &s[si],
2121                                                                 mask);
2122                         }
2123                 }
2124
2125                 so = si;
2126                 si ^= 1;
2127         }
2128
2129 exit:
2130         mutex_unlock(&hotkey_thread_mutex);
2131         return 0;
2132 }
2133
2134 static void hotkey_poll_stop_sync(void)
2135 {
2136         if (tpacpi_hotkey_task) {
2137                 if (frozen(tpacpi_hotkey_task) ||
2138                     freezing(tpacpi_hotkey_task))
2139                         thaw_process(tpacpi_hotkey_task);
2140
2141                 kthread_stop(tpacpi_hotkey_task);
2142                 tpacpi_hotkey_task = NULL;
2143                 mutex_lock(&hotkey_thread_mutex);
2144                 /* at this point, the thread did exit */
2145                 mutex_unlock(&hotkey_thread_mutex);
2146         }
2147 }
2148
2149 /* call with hotkey_mutex held */
2150 static void hotkey_poll_setup(int may_warn)
2151 {
2152         if ((hotkey_source_mask & hotkey_mask) != 0 &&
2153             hotkey_poll_freq > 0 &&
2154             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
2155                 if (!tpacpi_hotkey_task) {
2156                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
2157                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
2158                         if (IS_ERR(tpacpi_hotkey_task)) {
2159                                 tpacpi_hotkey_task = NULL;
2160                                 printk(TPACPI_ERR
2161                                        "could not create kernel thread "
2162                                        "for hotkey polling\n");
2163                         }
2164                 }
2165         } else {
2166                 hotkey_poll_stop_sync();
2167                 if (may_warn &&
2168                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
2169                         printk(TPACPI_NOTICE
2170                                 "hot keys 0x%08x require polling, "
2171                                 "which is currently disabled\n",
2172                                 hotkey_source_mask);
2173                 }
2174         }
2175 }
2176
2177 static void hotkey_poll_setup_safe(int may_warn)
2178 {
2179         mutex_lock(&hotkey_mutex);
2180         hotkey_poll_setup(may_warn);
2181         mutex_unlock(&hotkey_mutex);
2182 }
2183
2184 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2185
2186 static void hotkey_poll_setup_safe(int __unused)
2187 {
2188 }
2189
2190 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2191
2192 static int hotkey_inputdev_open(struct input_dev *dev)
2193 {
2194         switch (tpacpi_lifecycle) {
2195         case TPACPI_LIFE_INIT:
2196                 /*
2197                  * hotkey_init will call hotkey_poll_setup_safe
2198                  * at the appropriate moment
2199                  */
2200                 return 0;
2201         case TPACPI_LIFE_EXITING:
2202                 return -EBUSY;
2203         case TPACPI_LIFE_RUNNING:
2204                 hotkey_poll_setup_safe(0);
2205                 return 0;
2206         }
2207
2208         /* Should only happen if tpacpi_lifecycle is corrupt */
2209         BUG();
2210         return -EBUSY;
2211 }
2212
2213 static void hotkey_inputdev_close(struct input_dev *dev)
2214 {
2215         /* disable hotkey polling when possible */
2216         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
2217                 hotkey_poll_setup_safe(0);
2218 }
2219
2220 /* sysfs hotkey enable ------------------------------------------------- */
2221 static ssize_t hotkey_enable_show(struct device *dev,
2222                            struct device_attribute *attr,
2223                            char *buf)
2224 {
2225         int res, status;
2226
2227         printk_deprecated_attribute("hotkey_enable",
2228                         "Hotkey reporting is always enabled");
2229
2230         res = hotkey_status_get(&status);
2231         if (res)
2232                 return res;
2233
2234         return snprintf(buf, PAGE_SIZE, "%d\n", status);
2235 }
2236
2237 static ssize_t hotkey_enable_store(struct device *dev,
2238                             struct device_attribute *attr,
2239                             const char *buf, size_t count)
2240 {
2241         unsigned long t;
2242
2243         printk_deprecated_attribute("hotkey_enable",
2244                         "Hotkeys can be disabled through hotkey_mask");
2245
2246         if (parse_strtoul(buf, 1, &t))
2247                 return -EINVAL;
2248
2249         if (t == 0)
2250                 return -EPERM;
2251
2252         return count;
2253 }
2254
2255 static struct device_attribute dev_attr_hotkey_enable =
2256         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2257                 hotkey_enable_show, hotkey_enable_store);
2258
2259 /* sysfs hotkey mask --------------------------------------------------- */
2260 static ssize_t hotkey_mask_show(struct device *dev,
2261                            struct device_attribute *attr,
2262                            char *buf)
2263 {
2264         int res;
2265
2266         if (mutex_lock_killable(&hotkey_mutex))
2267                 return -ERESTARTSYS;
2268         res = hotkey_mask_get();
2269         mutex_unlock(&hotkey_mutex);
2270
2271         return (res)?
2272                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2273 }
2274
2275 static ssize_t hotkey_mask_store(struct device *dev,
2276                             struct device_attribute *attr,
2277                             const char *buf, size_t count)
2278 {
2279         unsigned long t;
2280         int res;
2281
2282         if (parse_strtoul(buf, 0xffffffffUL, &t))
2283                 return -EINVAL;
2284
2285         if (mutex_lock_killable(&hotkey_mutex))
2286                 return -ERESTARTSYS;
2287
2288         res = hotkey_mask_set(t);
2289
2290 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2291         hotkey_poll_setup(1);
2292 #endif
2293
2294         mutex_unlock(&hotkey_mutex);
2295
2296         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2297
2298         return (res) ? res : count;
2299 }
2300
2301 static struct device_attribute dev_attr_hotkey_mask =
2302         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2303                 hotkey_mask_show, hotkey_mask_store);
2304
2305 /* sysfs hotkey bios_enabled ------------------------------------------- */
2306 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2307                            struct device_attribute *attr,
2308                            char *buf)
2309 {
2310         return sprintf(buf, "0\n");
2311 }
2312
2313 static struct device_attribute dev_attr_hotkey_bios_enabled =
2314         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2315
2316 /* sysfs hotkey bios_mask ---------------------------------------------- */
2317 static ssize_t hotkey_bios_mask_show(struct device *dev,
2318                            struct device_attribute *attr,
2319                            char *buf)
2320 {
2321         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2322 }
2323
2324 static struct device_attribute dev_attr_hotkey_bios_mask =
2325         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2326
2327 /* sysfs hotkey all_mask ----------------------------------------------- */
2328 static ssize_t hotkey_all_mask_show(struct device *dev,
2329                            struct device_attribute *attr,
2330                            char *buf)
2331 {
2332         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2333                                 hotkey_all_mask | hotkey_source_mask);
2334 }
2335
2336 static struct device_attribute dev_attr_hotkey_all_mask =
2337         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2338
2339 /* sysfs hotkey recommended_mask --------------------------------------- */
2340 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2341                                             struct device_attribute *attr,
2342                                             char *buf)
2343 {
2344         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2345                         (hotkey_all_mask | hotkey_source_mask)
2346                         & ~hotkey_reserved_mask);
2347 }
2348
2349 static struct device_attribute dev_attr_hotkey_recommended_mask =
2350         __ATTR(hotkey_recommended_mask, S_IRUGO,
2351                 hotkey_recommended_mask_show, NULL);
2352
2353 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2354
2355 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2356 static ssize_t hotkey_source_mask_show(struct device *dev,
2357                            struct device_attribute *attr,
2358                            char *buf)
2359 {
2360         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2361 }
2362
2363 static ssize_t hotkey_source_mask_store(struct device *dev,
2364                             struct device_attribute *attr,
2365                             const char *buf, size_t count)
2366 {
2367         unsigned long t;
2368
2369         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2370                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2371                 return -EINVAL;
2372
2373         if (mutex_lock_killable(&hotkey_mutex))
2374                 return -ERESTARTSYS;
2375
2376         HOTKEY_CONFIG_CRITICAL_START
2377         hotkey_source_mask = t;
2378         HOTKEY_CONFIG_CRITICAL_END
2379
2380         hotkey_poll_setup(1);
2381
2382         mutex_unlock(&hotkey_mutex);
2383
2384         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2385
2386         return count;
2387 }
2388
2389 static struct device_attribute dev_attr_hotkey_source_mask =
2390         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2391                 hotkey_source_mask_show, hotkey_source_mask_store);
2392
2393 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2394 static ssize_t hotkey_poll_freq_show(struct device *dev,
2395                            struct device_attribute *attr,
2396                            char *buf)
2397 {
2398         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2399 }
2400
2401 static ssize_t hotkey_poll_freq_store(struct device *dev,
2402                             struct device_attribute *attr,
2403                             const char *buf, size_t count)
2404 {
2405         unsigned long t;
2406
2407         if (parse_strtoul(buf, 25, &t))
2408                 return -EINVAL;
2409
2410         if (mutex_lock_killable(&hotkey_mutex))
2411                 return -ERESTARTSYS;
2412
2413         hotkey_poll_freq = t;
2414
2415         hotkey_poll_setup(1);
2416         mutex_unlock(&hotkey_mutex);
2417
2418         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2419
2420         return count;
2421 }
2422
2423 static struct device_attribute dev_attr_hotkey_poll_freq =
2424         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2425                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2426
2427 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2428
2429 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2430 static ssize_t hotkey_radio_sw_show(struct device *dev,
2431                            struct device_attribute *attr,
2432                            char *buf)
2433 {
2434         int res;
2435         res = hotkey_get_wlsw();
2436         if (res < 0)
2437                 return res;
2438
2439         /* Opportunistic update */
2440         tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF));
2441
2442         return snprintf(buf, PAGE_SIZE, "%d\n",
2443                         (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1);
2444 }
2445
2446 static struct device_attribute dev_attr_hotkey_radio_sw =
2447         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2448
2449 static void hotkey_radio_sw_notify_change(void)
2450 {
2451         if (tp_features.hotkey_wlsw)
2452                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2453                              "hotkey_radio_sw");
2454 }
2455
2456 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2457 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2458                            struct device_attribute *attr,
2459                            char *buf)
2460 {
2461         int res, s;
2462         res = hotkey_get_tablet_mode(&s);
2463         if (res < 0)
2464                 return res;
2465
2466         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2467 }
2468
2469 static struct device_attribute dev_attr_hotkey_tablet_mode =
2470         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2471
2472 static void hotkey_tablet_mode_notify_change(void)
2473 {
2474         if (tp_features.hotkey_tablet)
2475                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2476                              "hotkey_tablet_mode");
2477 }
2478
2479 /* sysfs hotkey report_mode -------------------------------------------- */
2480 static ssize_t hotkey_report_mode_show(struct device *dev,
2481                            struct device_attribute *attr,
2482                            char *buf)
2483 {
2484         return snprintf(buf, PAGE_SIZE, "%d\n",
2485                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2486 }
2487
2488 static struct device_attribute dev_attr_hotkey_report_mode =
2489         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2490
2491 /* sysfs wakeup reason (pollable) -------------------------------------- */
2492 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2493                            struct device_attribute *attr,
2494                            char *buf)
2495 {
2496         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2497 }
2498
2499 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2500         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2501
2502 static void hotkey_wakeup_reason_notify_change(void)
2503 {
2504         if (tp_features.hotkey_mask)
2505                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2506                              "wakeup_reason");
2507 }
2508
2509 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2510 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2511                            struct device_attribute *attr,
2512                            char *buf)
2513 {
2514         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2515 }
2516
2517 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2518         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2519                hotkey_wakeup_hotunplug_complete_show, NULL);
2520
2521 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2522 {
2523         if (tp_features.hotkey_mask)
2524                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2525                              "wakeup_hotunplug_complete");
2526 }
2527
2528 /* --------------------------------------------------------------------- */
2529
2530 static struct attribute *hotkey_attributes[] __initdata = {
2531         &dev_attr_hotkey_enable.attr,
2532         &dev_attr_hotkey_bios_enabled.attr,
2533         &dev_attr_hotkey_report_mode.attr,
2534 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2535         &dev_attr_hotkey_mask.attr,
2536         &dev_attr_hotkey_all_mask.attr,
2537         &dev_attr_hotkey_recommended_mask.attr,
2538         &dev_attr_hotkey_source_mask.attr,
2539         &dev_attr_hotkey_poll_freq.attr,
2540 #endif
2541 };
2542
2543 static struct attribute *hotkey_mask_attributes[] __initdata = {
2544         &dev_attr_hotkey_bios_mask.attr,
2545 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2546         &dev_attr_hotkey_mask.attr,
2547         &dev_attr_hotkey_all_mask.attr,
2548         &dev_attr_hotkey_recommended_mask.attr,
2549 #endif
2550         &dev_attr_hotkey_wakeup_reason.attr,
2551         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2552 };
2553
2554 /*
2555  * Sync both the hw and sw blocking state of all switches
2556  */
2557 static void tpacpi_send_radiosw_update(void)
2558 {
2559         int wlsw;
2560
2561         /*
2562          * We must sync all rfkill controllers *before* issuing any
2563          * rfkill input events, or we will race the rfkill core input
2564          * handler.
2565          *
2566          * tpacpi_inputdev_send_mutex works as a syncronization point
2567          * for the above.
2568          *
2569          * We optimize to avoid numerous calls to hotkey_get_wlsw.
2570          */
2571
2572         wlsw = hotkey_get_wlsw();
2573
2574         /* Sync hw blocking state first if it is hw-blocked */
2575         if (wlsw == TPACPI_RFK_RADIO_OFF)
2576                 tpacpi_rfk_update_hwblock_state(true);
2577
2578         /* Sync sw blocking state */
2579         tpacpi_rfk_update_swstate_all();
2580
2581         /* Sync hw blocking state last if it is hw-unblocked */
2582         if (wlsw == TPACPI_RFK_RADIO_ON)
2583                 tpacpi_rfk_update_hwblock_state(false);
2584
2585         /* Issue rfkill input event for WLSW switch */
2586         if (!(wlsw < 0)) {
2587                 mutex_lock(&tpacpi_inputdev_send_mutex);
2588
2589                 input_report_switch(tpacpi_inputdev,
2590                                     SW_RFKILL_ALL, (wlsw > 0));
2591                 input_sync(tpacpi_inputdev);
2592
2593                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2594         }
2595
2596         /*
2597          * this can be unconditional, as we will poll state again
2598          * if userspace uses the notify to read data
2599          */
2600         hotkey_radio_sw_notify_change();
2601 }
2602
2603 static void hotkey_exit(void)
2604 {
2605 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2606         hotkey_poll_stop_sync();
2607 #endif
2608
2609         if (hotkey_dev_attributes)
2610                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2611
2612         kfree(hotkey_keycode_map);
2613
2614         if (tp_features.hotkey) {
2615                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2616                            "restoring original hot key mask\n");
2617                 /* no short-circuit boolean operator below! */
2618                 if ((hotkey_mask_set(hotkey_orig_mask) |
2619                      hotkey_status_set(false)) != 0)
2620                         printk(TPACPI_ERR
2621                                "failed to restore hot key mask "
2622                                "to BIOS defaults\n");
2623         }
2624 }
2625
2626 static int __init hotkey_init(struct ibm_init_struct *iibm)
2627 {
2628         /* Requirements for changing the default keymaps:
2629          *
2630          * 1. Many of the keys are mapped to KEY_RESERVED for very
2631          *    good reasons.  Do not change them unless you have deep
2632          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2633          *    the various ThinkPad models.  The driver behaves
2634          *    differently for KEY_RESERVED: such keys have their
2635          *    hot key mask *unset* in mask_recommended, and also
2636          *    in the initial hot key mask programmed into the
2637          *    firmware at driver load time, which means the firm-
2638          *    ware may react very differently if you change them to
2639          *    something else;
2640          *
2641          * 2. You must be subscribed to the linux-thinkpad and
2642          *    ibm-acpi-devel mailing lists, and you should read the
2643          *    list archives since 2007 if you want to change the
2644          *    keymaps.  This requirement exists so that you will
2645          *    know the past history of problems with the thinkpad-
2646          *    acpi driver keymaps, and also that you will be
2647          *    listening to any bug reports;
2648          *
2649          * 3. Do not send thinkpad-acpi specific patches directly to
2650          *    for merging, *ever*.  Send them to the linux-acpi
2651          *    mailinglist for comments.  Merging is to be done only
2652          *    through acpi-test and the ACPI maintainer.
2653          *
2654          * If the above is too much to ask, don't change the keymap.
2655          * Ask the thinkpad-acpi maintainer to do it, instead.
2656          */
2657         static u16 ibm_keycode_map[] __initdata = {
2658                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2659                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2660                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2661                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2662
2663                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2664                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2665                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2666                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2667
2668                 /* brightness: firmware always reacts to them, unless
2669                  * X.org did some tricks in the radeon BIOS scratch
2670                  * registers of *some* models */
2671                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2672                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2673
2674                 /* Thinklight: firmware always react to it */
2675                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2676
2677                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2678                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2679
2680                 /* Volume: firmware always react to it and reprograms
2681                  * the built-in *extra* mixer.  Never map it to control
2682                  * another mixer by default. */
2683                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2684                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2685                 KEY_RESERVED,   /* 0x16: MUTE */
2686
2687                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2688
2689                 /* (assignments unknown, please report if found) */
2690                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2691                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2692         };
2693         static u16 lenovo_keycode_map[] __initdata = {
2694                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2695                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2696                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2697                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2698
2699                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2700                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2701                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2702                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2703
2704                 /* These either have to go through ACPI video, or
2705                  * act like in the IBM ThinkPads, so don't ever
2706                  * enable them by default */
2707                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2708                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2709
2710                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2711
2712                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2713                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2714
2715                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2716                  * react to it and reprograms the built-in *extra* mixer.
2717                  * Never map it to control another mixer by default.
2718                  *
2719                  * T60?, T61, R60?, R61: firmware and EC tries to send
2720                  * these over the regular keyboard, so these are no-ops,
2721                  * but there are still weird bugs re. MUTE, so do not
2722                  * change unless you get test reports from all Lenovo
2723                  * models.  May cause the BIOS to interfere with the
2724                  * HDA mixer.
2725                  */
2726                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2727                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2728                 KEY_RESERVED,   /* 0x16: MUTE */
2729
2730                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2731
2732                 /* (assignments unknown, please report if found) */
2733                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2734                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2735         };
2736
2737 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2738 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2739 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2740
2741         int res, i;
2742         int status;
2743         int hkeyv;
2744
2745         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2746                         "initializing hotkey subdriver\n");
2747
2748         BUG_ON(!tpacpi_inputdev);
2749         BUG_ON(tpacpi_inputdev->open != NULL ||
2750                tpacpi_inputdev->close != NULL);
2751
2752         TPACPI_ACPIHANDLE_INIT(hkey);
2753         mutex_init(&hotkey_mutex);
2754
2755 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2756         mutex_init(&hotkey_thread_mutex);
2757         mutex_init(&hotkey_thread_data_mutex);
2758 #endif
2759
2760         /* hotkey not supported on 570 */
2761         tp_features.hotkey = hkey_handle != NULL;
2762
2763         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2764                 "hotkeys are %s\n",
2765                 str_supported(tp_features.hotkey));
2766
2767         if (!tp_features.hotkey)
2768                 return 1;
2769
2770         tpacpi_disable_brightness_delay();
2771
2772         hotkey_dev_attributes = create_attr_set(13, NULL);
2773         if (!hotkey_dev_attributes)
2774                 return -ENOMEM;
2775         res = add_many_to_attr_set(hotkey_dev_attributes,
2776                         hotkey_attributes,
2777                         ARRAY_SIZE(hotkey_attributes));
2778         if (res)
2779                 goto err_exit;
2780
2781         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2782            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2783            for HKEY interface version 0x100 */
2784         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2785                 if ((hkeyv >> 8) != 1) {
2786                         printk(TPACPI_ERR "unknown version of the "
2787                                "HKEY interface: 0x%x\n", hkeyv);
2788                         printk(TPACPI_ERR "please report this to %s\n",
2789                                TPACPI_MAIL);
2790                 } else {
2791                         /*
2792                          * MHKV 0x100 in A31, R40, R40e,
2793                          * T4x, X31, and later
2794                          */
2795                         tp_features.hotkey_mask = 1;
2796                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2797                                 "firmware HKEY interface version: 0x%x\n",
2798                                 hkeyv);
2799                 }
2800         }
2801
2802         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2803                 "hotkey masks are %s\n",
2804                 str_supported(tp_features.hotkey_mask));
2805
2806         if (tp_features.hotkey_mask) {
2807                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2808                                 "MHKA", "qd")) {
2809                         printk(TPACPI_ERR
2810                                "missing MHKA handler, "
2811                                "please report this to %s\n",
2812                                TPACPI_MAIL);
2813                         /* FN+F12, FN+F4, FN+F3 */
2814                         hotkey_all_mask = 0x080cU;
2815                 }
2816         }
2817
2818         /* hotkey_source_mask *must* be zero for
2819          * the first hotkey_mask_get */
2820         if (tp_features.hotkey_mask) {
2821                 res = hotkey_mask_get();
2822                 if (res)
2823                         goto err_exit;
2824
2825                 hotkey_orig_mask = hotkey_mask;
2826                 res = add_many_to_attr_set(
2827                                 hotkey_dev_attributes,
2828                                 hotkey_mask_attributes,
2829                                 ARRAY_SIZE(hotkey_mask_attributes));
2830                 if (res)
2831                         goto err_exit;
2832         }
2833
2834 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2835         if (tp_features.hotkey_mask) {
2836                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2837                                         & ~hotkey_all_mask;
2838         } else {
2839                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2840         }
2841
2842         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2843                     "hotkey source mask 0x%08x, polling freq %d\n",
2844                     hotkey_source_mask, hotkey_poll_freq);
2845 #endif
2846
2847 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2848         if (dbg_wlswemul) {
2849                 tp_features.hotkey_wlsw = 1;
2850                 printk(TPACPI_INFO
2851                         "radio switch emulation enabled\n");
2852         } else
2853 #endif
2854         /* Not all thinkpads have a hardware radio switch */
2855         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2856                 tp_features.hotkey_wlsw = 1;
2857                 printk(TPACPI_INFO
2858                         "radio switch found; radios are %s\n",
2859                         enabled(status, 0));
2860         }
2861         if (tp_features.hotkey_wlsw)
2862                 res = add_to_attr_set(hotkey_dev_attributes,
2863                                 &dev_attr_hotkey_radio_sw.attr);
2864
2865         /* For X41t, X60t, X61t Tablets... */
2866         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2867                 tp_features.hotkey_tablet = 1;
2868                 printk(TPACPI_INFO
2869                         "possible tablet mode switch found; "
2870                         "ThinkPad in %s mode\n",
2871                         (status & TP_HOTKEY_TABLET_MASK)?
2872                                 "tablet" : "laptop");
2873                 res = add_to_attr_set(hotkey_dev_attributes,
2874                                 &dev_attr_hotkey_tablet_mode.attr);
2875         }
2876
2877         if (!res)
2878                 res = register_attr_set_with_sysfs(
2879                                 hotkey_dev_attributes,
2880                                 &tpacpi_pdev->dev.kobj);
2881         if (res)
2882                 goto err_exit;
2883
2884         /* Set up key map */
2885
2886         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2887                                         GFP_KERNEL);
2888         if (!hotkey_keycode_map) {
2889                 printk(TPACPI_ERR
2890                         "failed to allocate memory for key map\n");
2891                 res = -ENOMEM;
2892                 goto err_exit;
2893         }
2894
2895         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2896                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2897                            "using Lenovo default hot key map\n");
2898                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2899                         TPACPI_HOTKEY_MAP_SIZE);
2900         } else {
2901                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2902                            "using IBM default hot key map\n");
2903                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2904                         TPACPI_HOTKEY_MAP_SIZE);
2905         }
2906
2907         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2908         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2909         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2910         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2911         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2912         tpacpi_inputdev->keycode = hotkey_keycode_map;
2913         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2914                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2915                         set_bit(hotkey_keycode_map[i],
2916                                 tpacpi_inputdev->keybit);
2917                 } else {
2918                         if (i < sizeof(hotkey_reserved_mask)*8)
2919                                 hotkey_reserved_mask |= 1 << i;
2920                 }
2921         }
2922
2923         if (tp_features.hotkey_wlsw) {
2924                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2925                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2926         }
2927         if (tp_features.hotkey_tablet) {
2928                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2929                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2930         }
2931
2932         /* Do not issue duplicate brightness change events to
2933          * userspace */
2934         if (!tp_features.bright_acpimode)
2935                 /* update bright_acpimode... */
2936                 tpacpi_check_std_acpi_brightness_support();
2937
2938         if (tp_features.bright_acpimode && acpi_video_backlight_support()) {
2939                 printk(TPACPI_INFO
2940                        "This ThinkPad has standard ACPI backlight "
2941                        "brightness control, supported by the ACPI "
2942                        "video driver\n");
2943                 printk(TPACPI_NOTICE
2944                        "Disabling thinkpad-acpi brightness events "
2945                        "by default...\n");
2946
2947                 /* The hotkey_reserved_mask change below is not
2948                  * necessary while the keys are at KEY_RESERVED in the
2949                  * default map, but better safe than sorry, leave it
2950                  * here as a marker of what we have to do, especially
2951                  * when we finally become able to set this at runtime
2952                  * on response to X.org requests */
2953                 hotkey_reserved_mask |=
2954                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2955                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2956         }
2957
2958         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2959                         "enabling firmware HKEY event interface...\n");
2960         res = hotkey_status_set(true);
2961         if (res) {
2962                 hotkey_exit();
2963                 return res;
2964         }
2965         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2966                                 & ~hotkey_reserved_mask)
2967                                 | hotkey_orig_mask);
2968         if (res < 0 && res != -ENXIO) {
2969                 hotkey_exit();
2970                 return res;
2971         }
2972
2973         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2974                         "legacy ibm/hotkey event reporting over procfs %s\n",
2975                         (hotkey_report_mode < 2) ?
2976                                 "enabled" : "disabled");
2977
2978         tpacpi_inputdev->open = &hotkey_inputdev_open;
2979         tpacpi_inputdev->close = &hotkey_inputdev_close;
2980
2981         hotkey_poll_setup_safe(1);
2982         tpacpi_send_radiosw_update();
2983         tpacpi_input_send_tabletsw();
2984
2985         return 0;
2986
2987 err_exit:
2988         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2989         hotkey_dev_attributes = NULL;
2990
2991         return (res < 0)? res : 1;
2992 }
2993
2994 static bool hotkey_notify_hotkey(const u32 hkey,
2995                                  bool *send_acpi_ev,
2996                                  bool *ignore_acpi_ev)
2997 {
2998         /* 0x1000-0x1FFF: key presses */
2999         unsigned int scancode = hkey & 0xfff;
3000         *send_acpi_ev = true;
3001         *ignore_acpi_ev = false;
3002
3003         if (scancode > 0 && scancode < 0x21) {
3004                 scancode--;
3005                 if (!(hotkey_source_mask & (1 << scancode))) {
3006                         tpacpi_input_send_key(scancode);
3007                         *send_acpi_ev = false;
3008                 } else {
3009                         *ignore_acpi_ev = true;
3010                 }
3011                 return true;
3012         }
3013         return false;
3014 }
3015
3016 static bool hotkey_notify_wakeup(const u32 hkey,
3017                                  bool *send_acpi_ev,
3018                                  bool *ignore_acpi_ev)
3019 {
3020         /* 0x2000-0x2FFF: Wakeup reason */
3021         *send_acpi_ev = true;
3022         *ignore_acpi_ev = false;
3023
3024         switch (hkey) {
3025         case 0x2304: /* suspend, undock */
3026         case 0x2404: /* hibernation, undock */
3027                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
3028                 *ignore_acpi_ev = true;
3029                 break;
3030
3031         case 0x2305: /* suspend, bay eject */
3032         case 0x2405: /* hibernation, bay eject */
3033                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
3034                 *ignore_acpi_ev = true;
3035                 break;
3036
3037         case 0x2313: /* Battery on critical low level (S3) */
3038         case 0x2413: /* Battery on critical low level (S4) */
3039                 printk(TPACPI_ALERT
3040                         "EMERGENCY WAKEUP: battery almost empty\n");
3041                 /* how to auto-heal: */
3042                 /* 2313: woke up from S3, go to S4/S5 */
3043                 /* 2413: woke up from S4, go to S5 */
3044                 break;
3045
3046         default:
3047                 return false;
3048         }
3049
3050         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
3051                 printk(TPACPI_INFO
3052                        "woke up due to a hot-unplug "
3053                        "request...\n");
3054                 hotkey_wakeup_reason_notify_change();
3055         }
3056         return true;
3057 }
3058
3059 static bool hotkey_notify_usrevent(const u32 hkey,
3060                                  bool *send_acpi_ev,
3061                                  bool *ignore_acpi_ev)
3062 {
3063         /* 0x5000-0x5FFF: human interface helpers */
3064         *send_acpi_ev = true;
3065         *ignore_acpi_ev = false;
3066
3067         switch (hkey) {
3068         case 0x5010: /* Lenovo new BIOS: brightness changed */
3069         case 0x500b: /* X61t: tablet pen inserted into bay */
3070         case 0x500c: /* X61t: tablet pen removed from bay */
3071                 return true;
3072
3073         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
3074         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
3075                 tpacpi_input_send_tabletsw();
3076                 hotkey_tablet_mode_notify_change();
3077                 *send_acpi_ev = false;
3078                 return true;
3079
3080         case 0x5001:
3081         case 0x5002:
3082                 /* LID switch events.  Do not propagate */
3083                 *ignore_acpi_ev = true;
3084                 return true;
3085
3086         default:
3087                 return false;
3088         }
3089 }
3090
3091 static bool hotkey_notify_thermal(const u32 hkey,
3092                                  bool *send_acpi_ev,
3093                                  bool *ignore_acpi_ev)
3094 {
3095         /* 0x6000-0x6FFF: thermal alarms */
3096         *send_acpi_ev = true;
3097         *ignore_acpi_ev = false;
3098
3099         switch (hkey) {
3100         case 0x6011:
3101                 printk(TPACPI_CRIT
3102                         "THERMAL ALARM: battery is too hot!\n");
3103                 /* recommended action: warn user through gui */
3104                 return true;
3105         case 0x6012:
3106                 printk(TPACPI_ALERT
3107                         "THERMAL EMERGENCY: battery is extremely hot!\n");
3108                 /* recommended action: immediate sleep/hibernate */
3109                 return true;
3110         case 0x6021:
3111                 printk(TPACPI_CRIT
3112                         "THERMAL ALARM: "
3113                         "a sensor reports something is too hot!\n");
3114                 /* recommended action: warn user through gui, that */
3115                 /* some internal component is too hot */
3116                 return true;
3117         case 0x6022:
3118                 printk(TPACPI_ALERT
3119                         "THERMAL EMERGENCY: "
3120                         "a sensor reports something is extremely hot!\n");
3121                 /* recommended action: immediate sleep/hibernate */
3122                 return true;
3123         case 0x6030:
3124                 printk(TPACPI_INFO
3125                         "EC reports that Thermal Table has changed\n");
3126                 /* recommended action: do nothing, we don't have
3127                  * Lenovo ATM information */
3128                 return true;
3129         default:
3130                 printk(TPACPI_ALERT
3131                          "THERMAL ALERT: unknown thermal alarm received\n");
3132                 return false;
3133         }
3134 }
3135
3136 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
3137 {
3138         u32 hkey;
3139         bool send_acpi_ev;
3140         bool ignore_acpi_ev;
3141         bool known_ev;
3142
3143         if (event != 0x80) {
3144                 printk(TPACPI_ERR
3145                        "unknown HKEY notification event %d\n", event);
3146                 /* forward it to userspace, maybe it knows how to handle it */
3147                 acpi_bus_generate_netlink_event(
3148                                         ibm->acpi->device->pnp.device_class,
3149                                         dev_name(&ibm->acpi->device->dev),
3150                                         event, 0);
3151                 return;
3152         }
3153
3154         while (1) {
3155                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
3156                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
3157                         return;
3158                 }
3159
3160                 if (hkey == 0) {
3161                         /* queue empty */
3162                         return;
3163                 }
3164
3165                 send_acpi_ev = true;
3166                 ignore_acpi_ev = false;
3167
3168                 switch (hkey >> 12) {
3169                 case 1:
3170                         /* 0x1000-0x1FFF: key presses */
3171                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
3172                                                  &ignore_acpi_ev);
3173                         break;
3174                 case 2:
3175                         /* 0x2000-0x2FFF: Wakeup reason */
3176                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
3177                                                  &ignore_acpi_ev);
3178                         break;
3179                 case 3:
3180                         /* 0x3000-0x3FFF: bay-related wakeups */
3181                         if (hkey == 0x3003) {
3182                                 hotkey_autosleep_ack = 1;
3183                                 printk(TPACPI_INFO
3184                                        "bay ejected\n");
3185                                 hotkey_wakeup_hotunplug_complete_notify_change();
3186                                 known_ev = true;
3187                         } else {
3188                                 known_ev = false;
3189                         }
3190                         break;
3191                 case 4:
3192                         /* 0x4000-0x4FFF: dock-related wakeups */
3193                         if (hkey == 0x4003) {
3194                                 hotkey_autosleep_ack = 1;
3195                                 printk(TPACPI_INFO
3196                                        "undocked\n");
3197                                 hotkey_wakeup_hotunplug_complete_notify_change();
3198                                 known_ev = true;
3199                         } else {
3200                                 known_ev = false;
3201                         }
3202                         break;
3203                 case 5:
3204                         /* 0x5000-0x5FFF: human interface helpers */
3205                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
3206                                                  &ignore_acpi_ev);
3207                         break;
3208                 case 6:
3209                         /* 0x6000-0x6FFF: thermal alarms */
3210                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
3211                                                  &ignore_acpi_ev);
3212                         break;
3213                 case 7:
3214                         /* 0x7000-0x7FFF: misc */
3215                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
3216                                 tpacpi_send_radiosw_update();
3217                                 send_acpi_ev = 0;
3218                                 known_ev = true;
3219                                 break;
3220                         }
3221                         /* fallthrough to default */
3222                 default:
3223                         known_ev = false;
3224                 }
3225                 if (!known_ev) {
3226                         printk(TPACPI_NOTICE
3227                                "unhandled HKEY event 0x%04x\n", hkey);
3228                         printk(TPACPI_NOTICE
3229                                "please report the conditions when this "
3230                                "event happened to %s\n", TPACPI_MAIL);
3231                 }
3232
3233                 /* Legacy events */
3234                 if (!ignore_acpi_ev &&
3235                     (send_acpi_ev || hotkey_report_mode < 2)) {
3236                         acpi_bus_generate_proc_event(ibm->acpi->device,
3237                                                      event, hkey);
3238                 }
3239
3240                 /* netlink events */
3241                 if (!ignore_acpi_ev && send_acpi_ev) {
3242                         acpi_bus_generate_netlink_event(
3243                                         ibm->acpi->device->pnp.device_class,
3244                                         dev_name(&ibm->acpi->device->dev),
3245                                         event, hkey);
3246                 }
3247         }
3248 }
3249
3250 static void hotkey_suspend(pm_message_t state)
3251 {
3252         /* Do these on suspend, we get the events on early resume! */
3253         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
3254         hotkey_autosleep_ack = 0;
3255 }
3256
3257 static void hotkey_resume(void)
3258 {
3259         tpacpi_disable_brightness_delay();
3260
3261         if (hotkey_mask_get())
3262                 printk(TPACPI_ERR
3263                        "error while trying to read hot key mask "
3264                        "from firmware\n");
3265         tpacpi_send_radiosw_update();
3266         hotkey_tablet_mode_notify_change();
3267         hotkey_wakeup_reason_notify_change();
3268         hotkey_wakeup_hotunplug_complete_notify_change();
3269         hotkey_poll_setup_safe(0);
3270 }
3271
3272 /* procfs -------------------------------------------------------------- */
3273 static int hotkey_read(char *p)
3274 {
3275         int res, status;
3276         int len = 0;
3277
3278         if (!tp_features.hotkey) {
3279                 len += sprintf(p + len, "status:\t\tnot supported\n");
3280                 return len;
3281         }
3282
3283         if (mutex_lock_killable(&hotkey_mutex))
3284                 return -ERESTARTSYS;
3285         res = hotkey_status_get(&status);
3286         if (!res)
3287                 res = hotkey_mask_get();
3288         mutex_unlock(&hotkey_mutex);
3289         if (res)
3290                 return res;
3291
3292         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3293         if (tp_features.hotkey_mask) {
3294                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3295                 len += sprintf(p + len,
3296                                "commands:\tenable, disable, reset, <mask>\n");
3297         } else {
3298                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3299                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3300         }
3301
3302         return len;
3303 }
3304
3305 static void hotkey_enabledisable_warn(bool enable)
3306 {
3307         tpacpi_log_usertask("procfs hotkey enable/disable");
3308         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3309                         TPACPI_WARN
3310                         "hotkey enable/disable functionality has been "
3311                         "removed from the driver.  Hotkeys are always "
3312                         "enabled\n"))
3313                 printk(TPACPI_ERR
3314                         "Please remove the hotkey=enable module "
3315                         "parameter, it is deprecated.  Hotkeys are always "
3316                         "enabled\n");
3317 }
3318
3319 static int hotkey_write(char *buf)
3320 {
3321         int res;
3322         u32 mask;
3323         char *cmd;
3324
3325         if (!tp_features.hotkey)
3326                 return -ENODEV;
3327
3328         if (mutex_lock_killable(&hotkey_mutex))
3329                 return -ERESTARTSYS;
3330
3331         mask = hotkey_mask;
3332
3333         res = 0;
3334         while ((cmd = next_cmd(&buf))) {
3335                 if (strlencmp(cmd, "enable") == 0) {
3336                         hotkey_enabledisable_warn(1);
3337                 } else if (strlencmp(cmd, "disable") == 0) {
3338                         hotkey_enabledisable_warn(0);
3339                         res = -EPERM;
3340                 } else if (strlencmp(cmd, "reset") == 0) {
3341                         mask = hotkey_orig_mask;
3342                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3343                         /* mask set */
3344                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3345                         /* mask set */
3346                 } else {
3347                         res = -EINVAL;
3348                         goto errexit;
3349                 }
3350         }
3351
3352         if (!res)
3353                 tpacpi_disclose_usertask("procfs hotkey",
3354                         "set mask to 0x%08x\n", mask);
3355
3356         if (!res && mask != hotkey_mask)
3357                 res = hotkey_mask_set(mask);
3358
3359 errexit:
3360         mutex_unlock(&hotkey_mutex);
3361         return res;
3362 }
3363
3364 static const struct acpi_device_id ibm_htk_device_ids[] = {
3365         {TPACPI_ACPI_HKEY_HID, 0},
3366         {"", 0},
3367 };
3368
3369 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3370         .hid = ibm_htk_device_ids,
3371         .notify = hotkey_notify,
3372         .handle = &hkey_handle,
3373         .type = ACPI_DEVICE_NOTIFY,
3374 };
3375
3376 static struct ibm_struct hotkey_driver_data = {
3377         .name = "hotkey",
3378         .read = hotkey_read,
3379         .write = hotkey_write,
3380         .exit = hotkey_exit,
3381         .resume = hotkey_resume,
3382         .suspend = hotkey_suspend,
3383         .acpi = &ibm_hotkey_acpidriver,
3384 };
3385
3386 /*************************************************************************
3387  * Bluetooth subdriver
3388  */
3389
3390 enum {
3391         /* ACPI GBDC/SBDC bits */
3392         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3393         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3394         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3395                                                    off / last state */
3396 };
3397
3398 enum {
3399         /* ACPI \BLTH commands */
3400         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3401         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3402         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3403         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3404         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3405 };
3406
3407 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3408
3409 static void bluetooth_suspend(pm_message_t state)
3410 {
3411         /* Try to make sure radio will resume powered off */
3412         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3413                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3414                 vdbg_printk(TPACPI_DBG_RFKILL,
3415                         "bluetooth power down on resume request failed\n");
3416 }
3417
3418 static int bluetooth_get_status(void)
3419 {
3420         int status;
3421
3422 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3423         if (dbg_bluetoothemul)
3424                 return (tpacpi_bluetooth_emulstate) ?
3425                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3426 #endif
3427
3428         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3429                 return -EIO;
3430
3431         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3432                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3433 }
3434
3435 static int bluetooth_set_status(enum tpacpi_rfkill_state state)
3436 {
3437         int status;
3438
3439         vdbg_printk(TPACPI_DBG_RFKILL,
3440                 "will attempt to %s bluetooth\n",
3441                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3442
3443 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3444         if (dbg_bluetoothemul) {
3445                 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON);
3446                 return 0;
3447         }
3448 #endif
3449
3450         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3451         if (state == TPACPI_RFK_RADIO_ON)
3452                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3453         else
3454                 status = 0;
3455
3456         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3457                 return -EIO;
3458
3459         return 0;
3460 }
3461
3462 /* sysfs bluetooth enable ---------------------------------------------- */
3463 static ssize_t bluetooth_enable_show(struct device *dev,
3464                            struct device_attribute *attr,
3465                            char *buf)
3466 {
3467         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID,
3468                         attr, buf);
3469 }
3470
3471 static ssize_t bluetooth_enable_store(struct device *dev,
3472                             struct device_attribute *attr,
3473                             const char *buf, size_t count)
3474 {
3475         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID,
3476                                 attr, buf, count);
3477 }
3478
3479 static struct device_attribute dev_attr_bluetooth_enable =
3480         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3481                 bluetooth_enable_show, bluetooth_enable_store);
3482
3483 /* --------------------------------------------------------------------- */
3484
3485 static struct attribute *bluetooth_attributes[] = {
3486         &dev_attr_bluetooth_enable.attr,
3487         NULL
3488 };
3489
3490 static const struct attribute_group bluetooth_attr_group = {
3491         .attrs = bluetooth_attributes,
3492 };
3493
3494 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = {
3495         .get_status = bluetooth_get_status,
3496         .set_status = bluetooth_set_status,
3497 };
3498
3499 static void bluetooth_shutdown(void)
3500 {
3501         /* Order firmware to save current state to NVRAM */
3502         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3503                         TP_ACPI_BLTH_SAVE_STATE))
3504                 printk(TPACPI_NOTICE
3505                         "failed to save bluetooth state to NVRAM\n");
3506         else
3507                 vdbg_printk(TPACPI_DBG_RFKILL,
3508                         "bluestooth state saved to NVRAM\n");
3509 }
3510
3511 static void bluetooth_exit(void)
3512 {
3513         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3514                         &bluetooth_attr_group);
3515
3516         tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3517
3518         bluetooth_shutdown();
3519 }
3520
3521 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3522 {
3523         int res;
3524         int status = 0;
3525
3526         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3527                         "initializing bluetooth subdriver\n");
3528
3529         TPACPI_ACPIHANDLE_INIT(hkey);
3530
3531         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3532            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3533         tp_features.bluetooth = hkey_handle &&
3534             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3535
3536         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3537                 "bluetooth is %s, status 0x%02x\n",
3538                 str_supported(tp_features.bluetooth),
3539                 status);
3540
3541 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3542         if (dbg_bluetoothemul) {
3543                 tp_features.bluetooth = 1;
3544                 printk(TPACPI_INFO
3545                         "bluetooth switch emulation enabled\n");
3546         } else
3547 #endif
3548         if (tp_features.bluetooth &&
3549             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3550                 /* no bluetooth hardware present in system */
3551                 tp_features.bluetooth = 0;
3552                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3553                            "bluetooth hardware not installed\n");
3554         }
3555
3556         if (!tp_features.bluetooth)
3557                 return 1;
3558
3559         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3560                                 &bluetooth_tprfk_ops,
3561                                 RFKILL_TYPE_BLUETOOTH,
3562                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3563                                 true);
3564         if (res)
3565                 return res;
3566
3567         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3568                                 &bluetooth_attr_group);
3569         if (res) {
3570                 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID);
3571                 return res;
3572         }
3573
3574         return 0;
3575 }
3576
3577 /* procfs -------------------------------------------------------------- */
3578 static int bluetooth_read(char *p)
3579 {
3580         return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, p);
3581 }
3582
3583 static int bluetooth_write(char *buf)
3584 {
3585         return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf);
3586 }
3587
3588 static struct ibm_struct bluetooth_driver_data = {
3589         .name = "bluetooth",
3590         .read = bluetooth_read,
3591         .write = bluetooth_write,
3592         .exit = bluetooth_exit,
3593         .suspend = bluetooth_suspend,
3594         .shutdown = bluetooth_shutdown,
3595 };
3596
3597 /*************************************************************************
3598  * Wan subdriver
3599  */
3600
3601 enum {
3602         /* ACPI GWAN/SWAN bits */
3603         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3604         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3605         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3606                                                    off / last state */
3607 };
3608
3609 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3610
3611 static void wan_suspend(pm_message_t state)
3612 {
3613         /* Try to make sure radio will resume powered off */
3614         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3615                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3616                 vdbg_printk(TPACPI_DBG_RFKILL,
3617                         "WWAN power down on resume request failed\n");
3618 }
3619
3620 static int wan_get_status(void)
3621 {
3622         int status;
3623
3624 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3625         if (dbg_wwanemul)
3626                 return (tpacpi_wwan_emulstate) ?
3627                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3628 #endif
3629
3630         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3631                 return -EIO;
3632
3633         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3634                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3635 }
3636
3637 static int wan_set_status(enum tpacpi_rfkill_state state)
3638 {
3639         int status;
3640
3641         vdbg_printk(TPACPI_DBG_RFKILL,
3642                 "will attempt to %s wwan\n",
3643                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3644
3645 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3646         if (dbg_wwanemul) {
3647                 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON);
3648                 return 0;
3649         }
3650 #endif
3651
3652         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3653         if (state == TPACPI_RFK_RADIO_ON)
3654                 status = TP_ACPI_WANCARD_RADIOSSW;
3655         else
3656                 status = 0;
3657
3658         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3659                 return -EIO;
3660
3661         return 0;
3662 }
3663
3664 /* sysfs wan enable ---------------------------------------------------- */
3665 static ssize_t wan_enable_show(struct device *dev,
3666                            struct device_attribute *attr,
3667                            char *buf)
3668 {
3669         return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID,
3670                         attr, buf);
3671 }
3672
3673 static ssize_t wan_enable_store(struct device *dev,
3674                             struct device_attribute *attr,
3675                             const char *buf, size_t count)
3676 {
3677         return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID,
3678                         attr, buf, count);
3679 }
3680
3681 static struct device_attribute dev_attr_wan_enable =
3682         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3683                 wan_enable_show, wan_enable_store);
3684
3685 /* --------------------------------------------------------------------- */
3686
3687 static struct attribute *wan_attributes[] = {
3688         &dev_attr_wan_enable.attr,
3689         NULL
3690 };
3691
3692 static const struct attribute_group wan_attr_group = {
3693         .attrs = wan_attributes,
3694 };
3695
3696 static const struct tpacpi_rfk_ops wan_tprfk_ops = {
3697         .get_status = wan_get_status,
3698         .set_status = wan_set_status,
3699 };
3700
3701 static void wan_shutdown(void)
3702 {
3703         /* Order firmware to save current state to NVRAM */
3704         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3705                         TP_ACPI_WGSV_SAVE_STATE))
3706                 printk(TPACPI_NOTICE
3707                         "failed to save WWAN state to NVRAM\n");
3708         else
3709                 vdbg_printk(TPACPI_DBG_RFKILL,
3710                         "WWAN state saved to NVRAM\n");
3711 }
3712
3713 static void wan_exit(void)
3714 {
3715         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3716                 &wan_attr_group);
3717
3718         tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3719
3720         wan_shutdown();
3721 }
3722
3723 static int __init wan_init(struct ibm_init_struct *iibm)
3724 {
3725         int res;
3726         int status = 0;
3727
3728         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3729                         "initializing wan subdriver\n");
3730
3731         TPACPI_ACPIHANDLE_INIT(hkey);
3732
3733         tp_features.wan = hkey_handle &&
3734             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3735
3736         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3737                 "wan is %s, status 0x%02x\n",
3738                 str_supported(tp_features.wan),
3739                 status);
3740
3741 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3742         if (dbg_wwanemul) {
3743                 tp_features.wan = 1;
3744                 printk(TPACPI_INFO
3745                         "wwan switch emulation enabled\n");
3746         } else
3747 #endif
3748         if (tp_features.wan &&
3749             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3750                 /* no wan hardware present in system */
3751                 tp_features.wan = 0;
3752                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3753                            "wan hardware not installed\n");
3754         }
3755
3756         if (!tp_features.wan)
3757                 return 1;
3758
3759         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3760                                 &wan_tprfk_ops,
3761                                 RFKILL_TYPE_WWAN,
3762                                 TPACPI_RFK_WWAN_SW_NAME,
3763                                 true);
3764         if (res)
3765                 return res;
3766
3767         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3768                                 &wan_attr_group);
3769
3770         if (res) {
3771                 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID);
3772                 return res;
3773         }
3774
3775         return 0;
3776 }
3777
3778 /* procfs -------------------------------------------------------------- */
3779 static int wan_read(char *p)
3780 {
3781         return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, p);
3782 }
3783
3784 static int wan_write(char *buf)
3785 {
3786         return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf);
3787 }
3788
3789 static struct ibm_struct wan_driver_data = {
3790         .name = "wan",
3791         .read = wan_read,
3792         .write = wan_write,
3793         .exit = wan_exit,
3794         .suspend = wan_suspend,
3795         .shutdown = wan_shutdown,
3796 };
3797
3798 /*************************************************************************
3799  * UWB subdriver
3800  */
3801
3802 enum {
3803         /* ACPI GUWB/SUWB bits */
3804         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
3805         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
3806 };
3807
3808 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
3809
3810 static int uwb_get_status(void)
3811 {
3812         int status;
3813
3814 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3815         if (dbg_uwbemul)
3816                 return (tpacpi_uwb_emulstate) ?
3817                        TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3818 #endif
3819
3820         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3821                 return -EIO;
3822
3823         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3824                         TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF;
3825 }
3826
3827 static int uwb_set_status(enum tpacpi_rfkill_state state)
3828 {
3829         int status;
3830
3831         vdbg_printk(TPACPI_DBG_RFKILL,
3832                 "will attempt to %s UWB\n",
3833                 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable");
3834
3835 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3836         if (dbg_uwbemul) {
3837                 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON);
3838                 return 0;
3839         }
3840 #endif
3841
3842         if (state == TPACPI_RFK_RADIO_ON)
3843                 status = TP_ACPI_UWB_RADIOSSW;
3844         else
3845                 status = 0;
3846
3847         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3848                 return -EIO;
3849
3850         return 0;
3851 }
3852
3853 /* --------------------------------------------------------------------- */
3854
3855 static const struct tpacpi_rfk_ops uwb_tprfk_ops = {
3856         .get_status = uwb_get_status,
3857         .set_status = uwb_set_status,
3858 };
3859
3860 static void uwb_exit(void)
3861 {
3862         tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID);
3863 }
3864
3865 static int __init uwb_init(struct ibm_init_struct *iibm)
3866 {
3867         int res;
3868         int status = 0;
3869
3870         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3871                         "initializing uwb subdriver\n");
3872
3873         TPACPI_ACPIHANDLE_INIT(hkey);
3874
3875         tp_features.uwb = hkey_handle &&
3876             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3877
3878         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3879                 "uwb is %s, status 0x%02x\n",
3880                 str_supported(tp_features.uwb),
3881                 status);
3882
3883 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3884         if (dbg_uwbemul) {
3885                 tp_features.uwb = 1;
3886                 printk(TPACPI_INFO
3887                         "uwb switch emulation enabled\n");
3888         } else
3889 #endif
3890         if (tp_features.uwb &&
3891             !(status & TP_ACPI_UWB_HWPRESENT)) {
3892                 /* no uwb hardware present in system */
3893                 tp_features.uwb = 0;
3894                 dbg_printk(TPACPI_DBG_INIT,
3895                            "uwb hardware not installed\n");
3896         }
3897
3898         if (!tp_features.uwb)
3899                 return 1;
3900
3901         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3902                                 &uwb_tprfk_ops,
3903                                 RFKILL_TYPE_UWB,
3904                                 TPACPI_RFK_UWB_SW_NAME,
3905                                 false);
3906         return res;
3907 }
3908
3909 static struct ibm_struct uwb_driver_data = {
3910         .name = "uwb",
3911         .exit = uwb_exit,
3912         .flags.experimental = 1,
3913 };
3914
3915 /*************************************************************************
3916  * Video subdriver
3917  */
3918
3919 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3920
3921 enum video_access_mode {
3922         TPACPI_VIDEO_NONE = 0,
3923         TPACPI_VIDEO_570,       /* 570 */
3924         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3925         TPACPI_VIDEO_NEW,       /* all others */
3926 };
3927
3928 enum {  /* video status flags, based on VIDEO_570 */
3929         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3930         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3931         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3932 };
3933
3934 enum {  /* TPACPI_VIDEO_570 constants */
3935         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3936         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3937                                                  * video_status_flags */
3938         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3939         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3940 };
3941
3942 static enum video_access_mode video_supported;
3943 static int video_orig_autosw;
3944
3945 static int video_autosw_get(void);
3946 static int video_autosw_set(int enable);
3947
3948 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3949
3950 static int __init video_init(struct ibm_init_struct *iibm)
3951 {
3952         int ivga;
3953
3954         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3955
3956         TPACPI_ACPIHANDLE_INIT(vid);
3957         TPACPI_ACPIHANDLE_INIT(vid2);
3958
3959         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3960                 /* G41, assume IVGA doesn't change */
3961                 vid_handle = vid2_handle;
3962
3963         if (!vid_handle)
3964                 /* video switching not supported on R30, R31 */
3965                 video_supported = TPACPI_VIDEO_NONE;
3966         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3967                 /* 570 */
3968                 video_supported = TPACPI_VIDEO_570;
3969         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3970                 /* 600e/x, 770e, 770x */
3971                 video_supported = TPACPI_VIDEO_770;
3972         else
3973                 /* all others */
3974                 video_supported = TPACPI_VIDEO_NEW;
3975
3976         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3977                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3978                 video_supported);
3979
3980         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3981 }
3982
3983 static void video_exit(void)
3984 {
3985         dbg_printk(TPACPI_DBG_EXIT,
3986                    "restoring original video autoswitch mode\n");
3987         if (video_autosw_set(video_orig_autosw))
3988                 printk(TPACPI_ERR "error while trying to restore original "
3989                         "video autoswitch mode\n");
3990 }
3991
3992 static int video_outputsw_get(void)
3993 {
3994         int status = 0;
3995         int i;
3996
3997         switch (video_supported) {
3998         case TPACPI_VIDEO_570:
3999                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
4000                                  TP_ACPI_VIDEO_570_PHSCMD))
4001                         return -EIO;
4002                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
4003                 break;
4004         case TPACPI_VIDEO_770:
4005                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
4006                         return -EIO;
4007                 if (i)
4008                         status |= TP_ACPI_VIDEO_S_LCD;
4009                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
4010                         return -EIO;
4011                 if (i)
4012                         status |= TP_ACPI_VIDEO_S_CRT;
4013                 break;
4014         case TPACPI_VIDEO_NEW:
4015                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4016                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4017                         return -EIO;
4018                 if (i)
4019                         status |= TP_ACPI_VIDEO_S_CRT;
4020
4021                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4022                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4023                         return -EIO;
4024                 if (i)
4025                         status |= TP_ACPI_VIDEO_S_LCD;
4026                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4027                         return -EIO;
4028                 if (i)
4029                         status |= TP_ACPI_VIDEO_S_DVI;
4030                 break;
4031         default:
4032                 return -ENOSYS;
4033         }
4034
4035         return status;
4036 }
4037
4038 static int video_outputsw_set(int status)
4039 {
4040         int autosw;
4041         int res = 0;
4042
4043         switch (video_supported) {
4044         case TPACPI_VIDEO_570:
4045                 res = acpi_evalf(NULL, NULL,
4046                                  "\\_SB.PHS2", "vdd",
4047                                  TP_ACPI_VIDEO_570_PHS2CMD,
4048                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4049                 break;
4050         case TPACPI_VIDEO_770:
4051                 autosw = video_autosw_get();
4052                 if (autosw < 0)
4053                         return autosw;
4054
4055                 res = video_autosw_set(1);
4056                 if (res)
4057                         return res;
4058                 res = acpi_evalf(vid_handle, NULL,
4059                                  "ASWT", "vdd", status * 0x100, 0);
4060                 if (!autosw && video_autosw_set(autosw)) {
4061                         printk(TPACPI_ERR
4062                                "video auto-switch left enabled due to error\n");
4063                         return -EIO;
4064                 }
4065                 break;
4066         case TPACPI_VIDEO_NEW:
4067                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4068                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4069                 break;
4070         default:
4071                 return -ENOSYS;
4072         }
4073
4074         return (res)? 0 : -EIO;
4075 }
4076
4077 static int video_autosw_get(void)
4078 {
4079         int autosw = 0;
4080
4081         switch (video_supported) {
4082         case TPACPI_VIDEO_570:
4083                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4084                         return -EIO;
4085                 break;
4086         case TPACPI_VIDEO_770:
4087         case TPACPI_VIDEO_NEW:
4088                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4089                         return -EIO;
4090                 break;
4091         default:
4092                 return -ENOSYS;
4093         }
4094
4095         return autosw & 1;
4096 }
4097
4098 static int video_autosw_set(int enable)
4099 {
4100         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4101                 return -EIO;
4102         return 0;
4103 }
4104
4105 static int video_outputsw_cycle(void)
4106 {
4107         int autosw = video_autosw_get();
4108         int res;
4109
4110         if (autosw < 0)
4111                 return autosw;
4112
4113         switch (video_supported) {
4114         case TPACPI_VIDEO_570:
4115                 res = video_autosw_set(1);
4116                 if (res)
4117                         return res;
4118                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4119                 break;
4120         case TPACPI_VIDEO_770:
4121         case TPACPI_VIDEO_NEW:
4122                 res = video_autosw_set(1);
4123                 if (res)
4124                         return res;
4125                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4126                 break;
4127         default:
4128                 return -ENOSYS;
4129         }
4130         if (!autosw && video_autosw_set(autosw)) {
4131                 printk(TPACPI_ERR
4132                        "video auto-switch left enabled due to error\n");
4133                 return -EIO;
4134         }
4135
4136         return (res)? 0 : -EIO;
4137 }
4138
4139 static int video_expand_toggle(void)
4140 {
4141         switch (video_supported) {
4142         case TPACPI_VIDEO_570:
4143                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4144                         0 : -EIO;
4145         case TPACPI_VIDEO_770:
4146                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4147                         0 : -EIO;
4148         case TPACPI_VIDEO_NEW:
4149                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4150                         0 : -EIO;
4151         default:
4152                 return -ENOSYS;
4153         }
4154         /* not reached */
4155 }
4156
4157 static int video_read(char *p)
4158 {
4159         int status, autosw;
4160         int len = 0;
4161
4162         if (video_supported == TPACPI_VIDEO_NONE) {
4163                 len += sprintf(p + len, "status:\t\tnot supported\n");
4164                 return len;
4165         }
4166
4167         status = video_outputsw_get();
4168         if (status < 0)
4169                 return status;
4170
4171         autosw = video_autosw_get();
4172         if (autosw < 0)
4173                 return autosw;
4174
4175         len += sprintf(p + len, "status:\t\tsupported\n");
4176         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4177         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4178         if (video_supported == TPACPI_VIDEO_NEW)
4179                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4180         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4181         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4182         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4183         if (video_supported == TPACPI_VIDEO_NEW)
4184                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4185         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4186         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4187
4188         return len;
4189 }
4190
4191 static int video_write(char *buf)
4192 {
4193         char *cmd;
4194         int enable, disable, status;
4195         int res;
4196
4197         if (video_supported == TPACPI_VIDEO_NONE)
4198                 return -ENODEV;
4199
4200         enable = 0;
4201         disable = 0;
4202
4203         while ((cmd = next_cmd(&buf))) {
4204                 if (strlencmp(cmd, "lcd_enable") == 0) {
4205                         enable |= TP_ACPI_VIDEO_S_LCD;
4206                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4207                         disable |= TP_ACPI_VIDEO_S_LCD;
4208                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4209                         enable |= TP_ACPI_VIDEO_S_CRT;
4210                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4211                         disable |= TP_ACPI_VIDEO_S_CRT;
4212                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4213                            strlencmp(cmd, "dvi_enable") == 0) {
4214                         enable |= TP_ACPI_VIDEO_S_DVI;
4215                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4216                            strlencmp(cmd, "dvi_disable") == 0) {
4217                         disable |= TP_ACPI_VIDEO_S_DVI;
4218                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4219                         res = video_autosw_set(1);
4220                         if (res)
4221                                 return res;
4222                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4223                         res = video_autosw_set(0);
4224                         if (res)
4225                                 return res;
4226                 } else if (strlencmp(cmd, "video_switch") == 0) {
4227                         res = video_outputsw_cycle();
4228                         if (res)
4229                                 return res;
4230                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4231                         res = video_expand_toggle();
4232                         if (res)
4233                                 return res;
4234                 } else
4235                         return -EINVAL;
4236         }
4237
4238         if (enable || disable) {
4239                 status = video_outputsw_get();
4240                 if (status < 0)
4241                         return status;
4242                 res = video_outputsw_set((status & ~disable) | enable);
4243                 if (res)
4244                         return res;
4245         }
4246
4247         return 0;
4248 }
4249
4250 static struct ibm_struct video_driver_data = {
4251         .name = "video",
4252         .read = video_read,
4253         .write = video_write,
4254         .exit = video_exit,
4255 };
4256
4257 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4258
4259 /*************************************************************************
4260  * Light (thinklight) subdriver
4261  */
4262
4263 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4264 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4265
4266 static int light_get_status(void)
4267 {
4268         int status = 0;
4269
4270         if (tp_features.light_status) {
4271                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4272                         return -EIO;
4273                 return (!!status);
4274         }
4275
4276         return -ENXIO;
4277 }
4278
4279 static int light_set_status(int status)
4280 {
4281         int rc;
4282
4283         if (tp_features.light) {
4284                 if (cmos_handle) {
4285                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4286                                         (status)?
4287                                                 TP_CMOS_THINKLIGHT_ON :
4288                                                 TP_CMOS_THINKLIGHT_OFF);
4289                 } else {
4290                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4291                                         (status)? 1 : 0);
4292                 }
4293                 return (rc)? 0 : -EIO;
4294         }
4295
4296         return -ENXIO;
4297 }
4298
4299 static void light_set_status_worker(struct work_struct *work)
4300 {
4301         struct tpacpi_led_classdev *data =
4302                         container_of(work, struct tpacpi_led_classdev, work);
4303
4304         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4305                 light_set_status((data->new_state != TPACPI_LED_OFF));
4306 }
4307
4308 static void light_sysfs_set(struct led_classdev *led_cdev,
4309                         enum led_brightness brightness)
4310 {
4311         struct tpacpi_led_classdev *data =
4312                 container_of(led_cdev,
4313                              struct tpacpi_led_classdev,
4314                              led_classdev);
4315         data->new_state = (brightness != LED_OFF) ?
4316                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4317         queue_work(tpacpi_wq, &data->work);
4318 }
4319
4320 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4321 {
4322         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4323 }
4324
4325 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4326         .led_classdev = {
4327                 .name           = "tpacpi::thinklight",
4328                 .brightness_set = &light_sysfs_set,
4329                 .brightness_get = &light_sysfs_get,
4330         }
4331 };
4332
4333 static int __init light_init(struct ibm_init_struct *iibm)
4334 {
4335         int rc;
4336
4337         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4338
4339         TPACPI_ACPIHANDLE_INIT(ledb);
4340         TPACPI_ACPIHANDLE_INIT(lght);
4341         TPACPI_ACPIHANDLE_INIT(cmos);
4342         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4343
4344         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4345         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4346
4347         if (tp_features.light)
4348                 /* light status not supported on
4349                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4350                 tp_features.light_status =
4351                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4352
4353         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4354                 str_supported(tp_features.light),
4355                 str_supported(tp_features.light_status));
4356
4357         if (!tp_features.light)
4358                 return 1;
4359
4360         rc = led_classdev_register(&tpacpi_pdev->dev,
4361                                    &tpacpi_led_thinklight.led_classdev);
4362
4363         if (rc < 0) {
4364                 tp_features.light = 0;
4365                 tp_features.light_status = 0;
4366         } else  {
4367                 rc = 0;
4368         }
4369
4370         return rc;
4371 }
4372
4373 static void light_exit(void)
4374 {
4375         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4376         if (work_pending(&tpacpi_led_thinklight.work))
4377                 flush_workqueue(tpacpi_wq);
4378 }
4379
4380 static int light_read(char *p)
4381 {
4382         int len = 0;
4383         int status;
4384
4385         if (!tp_features.light) {
4386                 len += sprintf(p + len, "status:\t\tnot supported\n");
4387         } else if (!tp_features.light_status) {
4388                 len += sprintf(p + len, "status:\t\tunknown\n");
4389                 len += sprintf(p + len, "commands:\ton, off\n");
4390         } else {
4391                 status = light_get_status();
4392                 if (status < 0)
4393                         return status;
4394                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4395                 len += sprintf(p + len, "commands:\ton, off\n");
4396         }
4397
4398         return len;
4399 }
4400
4401 static int light_write(char *buf)
4402 {
4403         char *cmd;
4404         int newstatus = 0;
4405
4406         if (!tp_features.light)
4407                 return -ENODEV;
4408
4409         while ((cmd = next_cmd(&buf))) {
4410                 if (strlencmp(cmd, "on") == 0) {
4411                         newstatus = 1;
4412                 } else if (strlencmp(cmd, "off") == 0) {
4413                         newstatus = 0;
4414                 } else
4415                         return -EINVAL;
4416         }
4417
4418         return light_set_status(newstatus);
4419 }
4420
4421 static struct ibm_struct light_driver_data = {
4422         .name = "light",
4423         .read = light_read,
4424         .write = light_write,
4425         .exit = light_exit,
4426 };
4427
4428 /*************************************************************************
4429  * CMOS subdriver
4430  */
4431
4432 /* sysfs cmos_command -------------------------------------------------- */
4433 static ssize_t cmos_command_store(struct device *dev,
4434                             struct device_attribute *attr,
4435                             const char *buf, size_t count)
4436 {
4437         unsigned long cmos_cmd;
4438         int res;
4439
4440         if (parse_strtoul(buf, 21, &cmos_cmd))
4441                 return -EINVAL;
4442
4443         res = issue_thinkpad_cmos_command(cmos_cmd);
4444         return (res)? res : count;
4445 }
4446
4447 static struct device_attribute dev_attr_cmos_command =
4448         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4449
4450 /* --------------------------------------------------------------------- */
4451
4452 static int __init cmos_init(struct ibm_init_struct *iibm)
4453 {
4454         int res;
4455
4456         vdbg_printk(TPACPI_DBG_INIT,
4457                 "initializing cmos commands subdriver\n");
4458
4459         TPACPI_ACPIHANDLE_INIT(cmos);
4460
4461         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4462                 str_supported(cmos_handle != NULL));
4463
4464         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4465         if (res)
4466                 return res;
4467
4468         return (cmos_handle)? 0 : 1;
4469 }
4470
4471 static void cmos_exit(void)
4472 {
4473         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4474 }
4475
4476 static int cmos_read(char *p)
4477 {
4478         int len = 0;
4479
4480         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4481            R30, R31, T20-22, X20-21 */
4482         if (!cmos_handle)
4483                 len += sprintf(p + len, "status:\t\tnot supported\n");
4484         else {
4485                 len += sprintf(p + len, "status:\t\tsupported\n");
4486                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4487         }
4488
4489         return len;
4490 }
4491
4492 static int cmos_write(char *buf)
4493 {
4494         char *cmd;
4495         int cmos_cmd, res;
4496
4497         while ((cmd = next_cmd(&buf))) {
4498                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4499                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4500                         /* cmos_cmd set */
4501                 } else
4502                         return -EINVAL;
4503
4504                 res = issue_thinkpad_cmos_command(cmos_cmd);
4505                 if (res)
4506                         return res;
4507         }
4508
4509         return 0;
4510 }
4511
4512 static struct ibm_struct cmos_driver_data = {
4513         .name = "cmos",
4514         .read = cmos_read,
4515         .write = cmos_write,
4516         .exit = cmos_exit,
4517 };
4518
4519 /*************************************************************************
4520  * LED subdriver
4521  */
4522
4523 enum led_access_mode {
4524         TPACPI_LED_NONE = 0,
4525         TPACPI_LED_570, /* 570 */
4526         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4527         TPACPI_LED_NEW, /* all others */
4528 };
4529
4530 enum {  /* For TPACPI_LED_OLD */
4531         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4532         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4533         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4534 };
4535
4536 static enum led_access_mode led_supported;
4537
4538 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4539            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4540                                 /* T20-22, X20-21 */
4541            "LED",               /* all others */
4542            );                   /* R30, R31 */
4543
4544 #define TPACPI_LED_NUMLEDS 16
4545 static struct tpacpi_led_classdev *tpacpi_leds;
4546 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4547 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4548         /* there's a limit of 19 chars + NULL before 2.6.26 */
4549         "tpacpi::power",
4550         "tpacpi:orange:batt",
4551         "tpacpi:green:batt",
4552         "tpacpi::dock_active",
4553         "tpacpi::bay_active",
4554         "tpacpi::dock_batt",
4555         "tpacpi::unknown_led",
4556         "tpacpi::standby",
4557         "tpacpi::dock_status1",
4558         "tpacpi::dock_status2",
4559         "tpacpi::unknown_led2",
4560         "tpacpi::unknown_led3",
4561         "tpacpi::thinkvantage",
4562 };
4563 #define TPACPI_SAFE_LEDS        0x1081U
4564
4565 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4566 {
4567 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4568         return false;
4569 #else
4570         return (1U & (TPACPI_SAFE_LEDS >> led)) == 0;
4571 #endif
4572 }
4573
4574 static int led_get_status(const unsigned int led)
4575 {
4576         int status;
4577         enum led_status_t led_s;
4578
4579         switch (led_supported) {
4580         case TPACPI_LED_570:
4581                 if (!acpi_evalf(ec_handle,
4582                                 &status, "GLED", "dd", 1 << led))
4583                         return -EIO;
4584                 led_s = (status == 0)?
4585                                 TPACPI_LED_OFF :
4586                                 ((status == 1)?
4587                                         TPACPI_LED_ON :
4588                                         TPACPI_LED_BLINK);
4589                 tpacpi_led_state_cache[led] = led_s;
4590                 return led_s;
4591         default:
4592                 return -ENXIO;
4593         }
4594
4595         /* not reached */
4596 }
4597
4598 static int led_set_status(const unsigned int led,
4599                           const enum led_status_t ledstatus)
4600 {
4601         /* off, on, blink. Index is led_status_t */
4602         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4603         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4604
4605         int rc = 0;
4606
4607         switch (led_supported) {
4608         case TPACPI_LED_570:
4609                 /* 570 */
4610                 if (unlikely(led > 7))
4611                         return -EINVAL;
4612                 if (unlikely(tpacpi_is_led_restricted(led)))
4613                         return -EPERM;
4614                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4615                                 (1 << led), led_sled_arg1[ledstatus]))
4616                         rc = -EIO;
4617                 break;
4618         case TPACPI_LED_OLD:
4619                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4620                 if (unlikely(led > 7))
4621                         return -EINVAL;
4622                 if (unlikely(tpacpi_is_led_restricted(led)))
4623                         return -EPERM;
4624                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4625                 if (rc >= 0)
4626                         rc = ec_write(TPACPI_LED_EC_HLBL,
4627                                       (ledstatus == TPACPI_LED_BLINK) << led);
4628                 if (rc >= 0)
4629                         rc = ec_write(TPACPI_LED_EC_HLCL,
4630                                       (ledstatus != TPACPI_LED_OFF) << led);
4631                 break;
4632         case TPACPI_LED_NEW:
4633                 /* all others */
4634                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4635                         return -EINVAL;
4636                 if (unlikely(tpacpi_is_led_restricted(led)))
4637                         return -EPERM;
4638                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4639                                 led, led_led_arg1[ledstatus]))
4640                         rc = -EIO;
4641                 break;
4642         default:
4643                 rc = -ENXIO;
4644         }
4645
4646         if (!rc)
4647                 tpacpi_led_state_cache[led] = ledstatus;
4648
4649         return rc;
4650 }
4651
4652 static void led_set_status_worker(struct work_struct *work)
4653 {
4654         struct tpacpi_led_classdev *data =
4655                 container_of(work, struct tpacpi_led_classdev, work);
4656
4657         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4658                 led_set_status(data->led, data->new_state);
4659 }
4660
4661 static void led_sysfs_set(struct led_classdev *led_cdev,
4662                         enum led_brightness brightness)
4663 {
4664         struct tpacpi_led_classdev *data = container_of(led_cdev,
4665                              struct tpacpi_led_classdev, led_classdev);
4666
4667         if (brightness == LED_OFF)
4668                 data->new_state = TPACPI_LED_OFF;
4669         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4670                 data->new_state = TPACPI_LED_ON;
4671         else
4672                 data->new_state = TPACPI_LED_BLINK;
4673
4674         queue_work(tpacpi_wq, &data->work);
4675 }
4676
4677 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4678                         unsigned long *delay_on, unsigned long *delay_off)
4679 {
4680         struct tpacpi_led_classdev *data = container_of(led_cdev,
4681                              struct tpacpi_led_classdev, led_classdev);
4682
4683         /* Can we choose the flash rate? */
4684         if (*delay_on == 0 && *delay_off == 0) {
4685                 /* yes. set them to the hardware blink rate (1 Hz) */
4686                 *delay_on = 500; /* ms */
4687                 *delay_off = 500; /* ms */
4688         } else if ((*delay_on != 500) || (*delay_off != 500))
4689                 return -EINVAL;
4690
4691         data->new_state = TPACPI_LED_BLINK;
4692         queue_work(tpacpi_wq, &data->work);
4693
4694         return 0;
4695 }
4696
4697 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4698 {
4699         int rc;
4700
4701         struct tpacpi_led_classdev *data = container_of(led_cdev,
4702                              struct tpacpi_led_classdev, led_classdev);
4703
4704         rc = led_get_status(data->led);
4705
4706         if (rc == TPACPI_LED_OFF || rc < 0)
4707                 rc = LED_OFF;   /* no error handling in led class :( */
4708         else
4709                 rc = LED_FULL;
4710
4711         return rc;
4712 }
4713
4714 static void led_exit(void)
4715 {
4716         unsigned int i;
4717
4718         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4719                 if (tpacpi_leds[i].led_classdev.name)
4720                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4721         }
4722
4723         kfree(tpacpi_leds);
4724 }
4725
4726 static int __init tpacpi_init_led(unsigned int led)
4727 {
4728         int rc;
4729
4730         tpacpi_leds[led].led = led;
4731
4732         /* LEDs with no name don't get registered */
4733         if (!tpacpi_led_names[led])
4734                 return 0;
4735
4736         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4737         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4738         if (led_supported == TPACPI_LED_570)
4739                 tpacpi_leds[led].led_classdev.brightness_get =
4740                                                 &led_sysfs_get;
4741
4742         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4743
4744         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4745
4746         rc = led_classdev_register(&tpacpi_pdev->dev,
4747                                 &tpacpi_leds[led].led_classdev);
4748         if (rc < 0)
4749                 tpacpi_leds[led].led_classdev.name = NULL;
4750
4751         return rc;
4752 }
4753
4754 static const struct tpacpi_quirk led_useful_qtable[] __initconst = {
4755         TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */
4756         TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */
4757         TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */
4758
4759         TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */
4760         TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */
4761         TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */
4762         TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */
4763         TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */
4764         TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */
4765         TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */
4766         TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */
4767
4768         TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */
4769         TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */
4770         TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */
4771         TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */
4772         TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */
4773
4774         TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */
4775         TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */
4776         TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */
4777         TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */
4778
4779         /* (1) - may have excess leds enabled on MSB */
4780
4781         /* Defaults (order matters, keep last, don't reorder!) */
4782         { /* Lenovo */
4783           .vendor = PCI_VENDOR_ID_LENOVO,
4784           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
4785           .quirks = 0x1fffU,
4786         },
4787         { /* IBM ThinkPads with no EC version string */
4788           .vendor = PCI_VENDOR_ID_IBM,
4789           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN,
4790           .quirks = 0x00ffU,
4791         },
4792         { /* IBM ThinkPads with EC version string */
4793           .vendor = PCI_VENDOR_ID_IBM,
4794           .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY,
4795           .quirks = 0x00bfU,
4796         },
4797 };
4798
4799 #undef TPACPI_LEDQ_IBM
4800 #undef TPACPI_LEDQ_LNV
4801
4802 static int __init led_init(struct ibm_init_struct *iibm)
4803 {
4804         unsigned int i;
4805         int rc;
4806         unsigned long useful_leds;
4807
4808         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4809
4810         TPACPI_ACPIHANDLE_INIT(led);
4811
4812         if (!led_handle)
4813                 /* led not supported on R30, R31 */
4814                 led_supported = TPACPI_LED_NONE;
4815         else if (strlencmp(led_path, "SLED") == 0)
4816                 /* 570 */
4817                 led_supported = TPACPI_LED_570;
4818         else if (strlencmp(led_path, "SYSL") == 0)
4819                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4820                 led_supported = TPACPI_LED_OLD;
4821         else
4822                 /* all others */
4823                 led_supported = TPACPI_LED_NEW;
4824
4825         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4826                 str_supported(led_supported), led_supported);
4827
4828         if (led_supported == TPACPI_LED_NONE)
4829                 return 1;
4830
4831         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4832                               GFP_KERNEL);
4833         if (!tpacpi_leds) {
4834                 printk(TPACPI_ERR "Out of memory for LED data\n");
4835                 return -ENOMEM;
4836         }
4837
4838         useful_leds = tpacpi_check_quirks(led_useful_qtable,
4839                                           ARRAY_SIZE(led_useful_qtable));
4840
4841         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4842                 if (!tpacpi_is_led_restricted(i) &&
4843                     test_bit(i, &useful_leds)) {
4844                         rc = tpacpi_init_led(i);
4845                         if (rc < 0) {
4846                                 led_exit();
4847                                 return rc;
4848                         }
4849                 }
4850         }
4851
4852 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4853         printk(TPACPI_NOTICE
4854                 "warning: userspace override of important "
4855                 "firmware LEDs is enabled\n");
4856 #endif
4857         return 0;
4858 }
4859
4860 #define str_led_status(s) \
4861         ((s) == TPACPI_LED_OFF ? "off" : \
4862                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4863
4864 static int led_read(char *p)
4865 {
4866         int len = 0;
4867
4868         if (!led_supported) {
4869                 len += sprintf(p + len, "status:\t\tnot supported\n");
4870                 return len;
4871         }
4872         len += sprintf(p + len, "status:\t\tsupported\n");
4873
4874         if (led_supported == TPACPI_LED_570) {
4875                 /* 570 */
4876                 int i, status;
4877                 for (i = 0; i < 8; i++) {
4878                         status = led_get_status(i);
4879                         if (status < 0)
4880                                 return -EIO;
4881                         len += sprintf(p + len, "%d:\t\t%s\n",
4882                                        i, str_led_status(status));
4883                 }
4884         }
4885
4886         len += sprintf(p + len, "commands:\t"
4887                        "<led> on, <led> off, <led> blink (<led> is 0-15)\n");
4888
4889         return len;
4890 }
4891
4892 static int led_write(char *buf)
4893 {
4894         char *cmd;
4895         int led, rc;
4896         enum led_status_t s;
4897
4898         if (!led_supported)
4899                 return -ENODEV;
4900
4901         while ((cmd = next_cmd(&buf))) {
4902                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15)
4903                         return -EINVAL;
4904
4905                 if (strstr(cmd, "off")) {
4906                         s = TPACPI_LED_OFF;
4907                 } else if (strstr(cmd, "on")) {
4908                         s = TPACPI_LED_ON;
4909                 } else if (strstr(cmd, "blink")) {
4910                         s = TPACPI_LED_BLINK;
4911                 } else {
4912                         return -EINVAL;
4913                 }
4914
4915                 rc = led_set_status(led, s);
4916                 if (rc < 0)
4917                         return rc;
4918         }
4919
4920         return 0;
4921 }
4922
4923 static struct ibm_struct led_driver_data = {
4924         .name = "led",
4925         .read = led_read,
4926         .write = led_write,
4927         .exit = led_exit,
4928 };
4929
4930 /*************************************************************************
4931  * Beep subdriver
4932  */
4933
4934 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4935
4936 #define TPACPI_BEEP_Q1 0x0001
4937
4938 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
4939         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
4940         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
4941 };
4942
4943 static int __init beep_init(struct ibm_init_struct *iibm)
4944 {
4945         unsigned long quirks;
4946
4947         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4948
4949         TPACPI_ACPIHANDLE_INIT(beep);
4950
4951         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4952                 str_supported(beep_handle != NULL));
4953
4954         quirks = tpacpi_check_quirks(beep_quirk_table,
4955                                      ARRAY_SIZE(beep_quirk_table));
4956
4957         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
4958
4959         return (beep_handle)? 0 : 1;
4960 }
4961
4962 static int beep_read(char *p)
4963 {
4964         int len = 0;
4965
4966         if (!beep_handle)
4967                 len += sprintf(p + len, "status:\t\tnot supported\n");
4968         else {
4969                 len += sprintf(p + len, "status:\t\tsupported\n");
4970                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4971         }
4972
4973         return len;
4974 }
4975
4976 static int beep_write(char *buf)
4977 {
4978         char *cmd;
4979         int beep_cmd;
4980
4981         if (!beep_handle)
4982                 return -ENODEV;
4983
4984         while ((cmd = next_cmd(&buf))) {
4985                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4986                     beep_cmd >= 0 && beep_cmd <= 17) {
4987                         /* beep_cmd set */
4988                 } else
4989                         return -EINVAL;
4990                 if (tp_features.beep_needs_two_args) {
4991                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
4992                                         beep_cmd, 0))
4993                                 return -EIO;
4994                 } else {
4995                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
4996                                         beep_cmd))
4997                                 return -EIO;
4998                 }
4999         }
5000
5001         return 0;
5002 }
5003
5004 static struct ibm_struct beep_driver_data = {
5005         .name = "beep",
5006         .read = beep_read,
5007         .write = beep_write,
5008 };
5009
5010 /*************************************************************************
5011  * Thermal subdriver
5012  */
5013
5014 enum thermal_access_mode {
5015         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5016         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5017         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5018         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5019         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5020 };
5021
5022 enum { /* TPACPI_THERMAL_TPEC_* */
5023         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5024         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5025         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5026 };
5027
5028 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5029 struct ibm_thermal_sensors_struct {
5030         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5031 };
5032
5033 static enum thermal_access_mode thermal_read_mode;
5034
5035 /* idx is zero-based */
5036 static int thermal_get_sensor(int idx, s32 *value)
5037 {
5038         int t;
5039         s8 tmp;
5040         char tmpi[5];
5041
5042         t = TP_EC_THERMAL_TMP0;
5043
5044         switch (thermal_read_mode) {
5045 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5046         case TPACPI_THERMAL_TPEC_16:
5047                 if (idx >= 8 && idx <= 15) {
5048                         t = TP_EC_THERMAL_TMP8;
5049                         idx -= 8;
5050                 }
5051                 /* fallthrough */
5052 #endif
5053         case TPACPI_THERMAL_TPEC_8:
5054                 if (idx <= 7) {
5055                         if (!acpi_ec_read(t + idx, &tmp))
5056                                 return -EIO;
5057                         *value = tmp * 1000;
5058                         return 0;
5059                 }
5060                 break;
5061
5062         case TPACPI_THERMAL_ACPI_UPDT:
5063                 if (idx <= 7) {
5064                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5065                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5066                                 return -EIO;
5067                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5068                                 return -EIO;
5069                         *value = (t - 2732) * 100;
5070                         return 0;
5071                 }
5072                 break;
5073
5074         case TPACPI_THERMAL_ACPI_TMP07:
5075                 if (idx <= 7) {
5076                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5077                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5078                                 return -EIO;
5079                         if (t > 127 || t < -127)
5080                                 t = TP_EC_THERMAL_TMP_NA;
5081                         *value = t * 1000;
5082                         return 0;
5083                 }
5084                 break;
5085
5086         case TPACPI_THERMAL_NONE:
5087         default:
5088                 return -ENOSYS;
5089         }
5090
5091         return -EINVAL;
5092 }
5093
5094 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5095 {
5096         int res, i;
5097         int n;
5098
5099         n = 8;
5100         i = 0;
5101
5102         if (!s)
5103                 return -EINVAL;
5104
5105         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5106                 n = 16;
5107
5108         for (i = 0 ; i < n; i++) {
5109                 res = thermal_get_sensor(i, &s->temp[i]);
5110                 if (res)
5111                         return res;
5112         }
5113
5114         return n;
5115 }
5116
5117 /* sysfs temp##_input -------------------------------------------------- */
5118
5119 static ssize_t thermal_temp_input_show(struct device *dev,
5120                            struct device_attribute *attr,
5121                            char *buf)
5122 {
5123         struct sensor_device_attribute *sensor_attr =
5124                                         to_sensor_dev_attr(attr);
5125         int idx = sensor_attr->index;
5126         s32 value;
5127         int res;
5128
5129         res = thermal_get_sensor(idx, &value);
5130         if (res)
5131                 return res;
5132         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5133                 return -ENXIO;
5134
5135         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5136 }
5137
5138 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5139          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5140                      thermal_temp_input_show, NULL, _idxB)
5141
5142 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5143         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5144         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5145         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5146         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5147         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5148         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5149         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5150         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5151         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5152         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5153         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5154         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5155         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5156         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5157         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5158         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5159 };
5160
5161 #define THERMAL_ATTRS(X) \
5162         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5163
5164 static struct attribute *thermal_temp_input_attr[] = {
5165         THERMAL_ATTRS(8),
5166         THERMAL_ATTRS(9),
5167         THERMAL_ATTRS(10),
5168         THERMAL_ATTRS(11),
5169         THERMAL_ATTRS(12),
5170         THERMAL_ATTRS(13),
5171         THERMAL_ATTRS(14),
5172         THERMAL_ATTRS(15),
5173         THERMAL_ATTRS(0),
5174         THERMAL_ATTRS(1),
5175         THERMAL_ATTRS(2),
5176         THERMAL_ATTRS(3),
5177         THERMAL_ATTRS(4),
5178         THERMAL_ATTRS(5),
5179         THERMAL_ATTRS(6),
5180         THERMAL_ATTRS(7),
5181         NULL
5182 };
5183
5184 static const struct attribute_group thermal_temp_input16_group = {
5185         .attrs = thermal_temp_input_attr
5186 };
5187
5188 static const struct attribute_group thermal_temp_input8_group = {
5189         .attrs = &thermal_temp_input_attr[8]
5190 };
5191
5192 #undef THERMAL_SENSOR_ATTR_TEMP
5193 #undef THERMAL_ATTRS
5194
5195 /* --------------------------------------------------------------------- */
5196
5197 static int __init thermal_init(struct ibm_init_struct *iibm)
5198 {
5199         u8 t, ta1, ta2;
5200         int i;
5201         int acpi_tmp7;
5202         int res;
5203
5204         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5205
5206         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5207
5208         if (thinkpad_id.ec_model) {
5209                 /*
5210                  * Direct EC access mode: sensors at registers
5211                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5212                  * non-implemented, thermal sensors return 0x80 when
5213                  * not available
5214                  */
5215
5216                 ta1 = ta2 = 0;
5217                 for (i = 0; i < 8; i++) {
5218                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5219                                 ta1 |= t;
5220                         } else {
5221                                 ta1 = 0;
5222                                 break;
5223                         }
5224                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5225                                 ta2 |= t;
5226                         } else {
5227                                 ta1 = 0;
5228                                 break;
5229                         }
5230                 }
5231                 if (ta1 == 0) {
5232                         /* This is sheer paranoia, but we handle it anyway */
5233                         if (acpi_tmp7) {
5234                                 printk(TPACPI_ERR
5235                                        "ThinkPad ACPI EC access misbehaving, "
5236                                        "falling back to ACPI TMPx access "
5237                                        "mode\n");
5238                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5239                         } else {
5240                                 printk(TPACPI_ERR
5241                                        "ThinkPad ACPI EC access misbehaving, "
5242                                        "disabling thermal sensors access\n");
5243                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5244                         }
5245                 } else {
5246                         thermal_read_mode =
5247                             (ta2 != 0) ?
5248                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5249                 }
5250         } else if (acpi_tmp7) {
5251                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5252                         /* 600e/x, 770e, 770x */
5253                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5254                 } else {
5255                         /* Standard ACPI TMPx access, max 8 sensors */
5256                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5257                 }
5258         } else {
5259                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5260                 thermal_read_mode = TPACPI_THERMAL_NONE;
5261         }
5262
5263         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5264                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5265                 thermal_read_mode);
5266
5267         switch (thermal_read_mode) {
5268         case TPACPI_THERMAL_TPEC_16:
5269                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5270                                 &thermal_temp_input16_group);
5271                 if (res)
5272                         return res;
5273                 break;
5274         case TPACPI_THERMAL_TPEC_8:
5275         case TPACPI_THERMAL_ACPI_TMP07:
5276         case TPACPI_THERMAL_ACPI_UPDT:
5277                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5278                                 &thermal_temp_input8_group);
5279                 if (res)
5280                         return res;
5281                 break;
5282         case TPACPI_THERMAL_NONE:
5283         default:
5284                 return 1;
5285         }
5286
5287         return 0;
5288 }
5289
5290 static void thermal_exit(void)
5291 {
5292         switch (thermal_read_mode) {
5293         case TPACPI_THERMAL_TPEC_16:
5294                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5295                                    &thermal_temp_input16_group);
5296                 break;
5297         case TPACPI_THERMAL_TPEC_8:
5298         case TPACPI_THERMAL_ACPI_TMP07:
5299         case TPACPI_THERMAL_ACPI_UPDT:
5300                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5301                                    &thermal_temp_input16_group);
5302                 break;
5303         case TPACPI_THERMAL_NONE:
5304         default:
5305                 break;
5306         }
5307 }
5308
5309 static int thermal_read(char *p)
5310 {
5311         int len = 0;
5312         int n, i;
5313         struct ibm_thermal_sensors_struct t;
5314
5315         n = thermal_get_sensors(&t);
5316         if (unlikely(n < 0))
5317                 return n;
5318
5319         len += sprintf(p + len, "temperatures:\t");
5320
5321         if (n > 0) {
5322                 for (i = 0; i < (n - 1); i++)
5323                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5324                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5325         } else
5326                 len += sprintf(p + len, "not supported\n");
5327
5328         return len;
5329 }
5330
5331 static struct ibm_struct thermal_driver_data = {
5332         .name = "thermal",
5333         .read = thermal_read,
5334         .exit = thermal_exit,
5335 };
5336
5337 /*************************************************************************
5338  * EC Dump subdriver
5339  */
5340
5341 static u8 ecdump_regs[256];
5342
5343 static int ecdump_read(char *p)
5344 {
5345         int len = 0;
5346         int i, j;
5347         u8 v;
5348
5349         len += sprintf(p + len, "EC      "
5350                        " +00 +01 +02 +03 +04 +05 +06 +07"
5351                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5352         for (i = 0; i < 256; i += 16) {
5353                 len += sprintf(p + len, "EC 0x%02x:", i);
5354                 for (j = 0; j < 16; j++) {
5355                         if (!acpi_ec_read(i + j, &v))
5356                                 break;
5357                         if (v != ecdump_regs[i + j])
5358                                 len += sprintf(p + len, " *%02x", v);
5359                         else
5360                                 len += sprintf(p + len, "  %02x", v);
5361                         ecdump_regs[i + j] = v;
5362                 }
5363                 len += sprintf(p + len, "\n");
5364                 if (j != 16)
5365                         break;
5366         }
5367
5368         /* These are way too dangerous to advertise openly... */
5369 #if 0
5370         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5371                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5372         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5373                        " (<offset> is 00-ff, <value> is 0-255)\n");
5374 #endif
5375         return len;
5376 }
5377
5378 static int ecdump_write(char *buf)
5379 {
5380         char *cmd;
5381         int i, v;
5382
5383         while ((cmd = next_cmd(&buf))) {
5384                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5385                         /* i and v set */
5386                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5387                         /* i and v set */
5388                 } else
5389                         return -EINVAL;
5390                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5391                         if (!acpi_ec_write(i, v))
5392                                 return -EIO;
5393                 } else
5394                         return -EINVAL;
5395         }
5396
5397         return 0;
5398 }
5399
5400 static struct ibm_struct ecdump_driver_data = {
5401         .name = "ecdump",
5402         .read = ecdump_read,
5403         .write = ecdump_write,
5404         .flags.experimental = 1,
5405 };
5406
5407 /*************************************************************************
5408  * Backlight/brightness subdriver
5409  */
5410
5411 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5412
5413 /*
5414  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5415  * CMOS NVRAM byte 0x5E, bits 0-3.
5416  *
5417  * EC HBRV (0x31) has the following layout
5418  *   Bit 7: unknown function
5419  *   Bit 6: unknown function
5420  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5421  *   Bit 4: must be set to zero to avoid problems
5422  *   Bit 3-0: backlight brightness level
5423  *
5424  * brightness_get_raw returns status data in the HBRV layout
5425  *
5426  * WARNING: The X61 has been verified to use HBRV for something else, so
5427  * this should be used _only_ on IBM ThinkPads, and maybe with some careful
5428  * testing on the very early *60 Lenovo models...
5429  */
5430
5431 enum {
5432         TP_EC_BACKLIGHT = 0x31,
5433
5434         /* TP_EC_BACKLIGHT bitmasks */
5435         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5436         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5437         TP_EC_BACKLIGHT_MAPSW = 0x20,
5438 };
5439
5440 enum tpacpi_brightness_access_mode {
5441         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5442         TPACPI_BRGHT_MODE_EC,           /* EC control */
5443         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5444         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5445         TPACPI_BRGHT_MODE_MAX
5446 };
5447
5448 static struct backlight_device *ibm_backlight_device;
5449
5450 static enum tpacpi_brightness_access_mode brightness_mode =
5451                 TPACPI_BRGHT_MODE_MAX;
5452
5453 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5454
5455 static struct mutex brightness_mutex;
5456
5457 /* NVRAM brightness access,
5458  * call with brightness_mutex held! */
5459 static unsigned int tpacpi_brightness_nvram_get(void)
5460 {
5461         u8 lnvram;
5462
5463         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5464                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5465                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5466         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5467
5468         return lnvram;
5469 }
5470
5471 static void tpacpi_brightness_checkpoint_nvram(void)
5472 {
5473         u8 lec = 0;
5474         u8 b_nvram;
5475
5476         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5477                 return;
5478
5479         vdbg_printk(TPACPI_DBG_BRGHT,
5480                 "trying to checkpoint backlight level to NVRAM...\n");
5481
5482         if (mutex_lock_killable(&brightness_mutex) < 0)
5483                 return;
5484
5485         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5486                 goto unlock;
5487         lec &= TP_EC_BACKLIGHT_LVLMSK;
5488         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5489
5490         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5491                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5492                 /* NVRAM needs update */
5493                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5494                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5495                 b_nvram |= lec;
5496                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5497                 dbg_printk(TPACPI_DBG_BRGHT,
5498                            "updated NVRAM backlight level to %u (0x%02x)\n",
5499                            (unsigned int) lec, (unsigned int) b_nvram);
5500         } else
5501                 vdbg_printk(TPACPI_DBG_BRGHT,
5502                            "NVRAM backlight level already is %u (0x%02x)\n",
5503                            (unsigned int) lec, (unsigned int) b_nvram);
5504
5505 unlock:
5506         mutex_unlock(&brightness_mutex);
5507 }
5508
5509
5510 /* call with brightness_mutex held! */
5511 static int tpacpi_brightness_get_raw(int *status)
5512 {
5513         u8 lec = 0;
5514
5515         switch (brightness_mode) {
5516         case TPACPI_BRGHT_MODE_UCMS_STEP:
5517                 *status = tpacpi_brightness_nvram_get();
5518                 return 0;
5519         case TPACPI_BRGHT_MODE_EC:
5520         case TPACPI_BRGHT_MODE_ECNVRAM:
5521                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5522                         return -EIO;
5523                 *status = lec;
5524                 return 0;
5525         default:
5526                 return -ENXIO;
5527         }
5528 }
5529
5530 /* call with brightness_mutex held! */
5531 /* do NOT call with illegal backlight level value */
5532 static int tpacpi_brightness_set_ec(unsigned int value)
5533 {
5534         u8 lec = 0;
5535
5536         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5537                 return -EIO;
5538
5539         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5540                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5541                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5542                 return -EIO;
5543
5544         return 0;
5545 }
5546
5547 /* call with brightness_mutex held! */
5548 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5549 {
5550         int cmos_cmd, inc;
5551         unsigned int current_value, i;
5552
5553         current_value = tpacpi_brightness_nvram_get();
5554
5555         if (value == current_value)
5556                 return 0;
5557
5558         cmos_cmd = (value > current_value) ?
5559                         TP_CMOS_BRIGHTNESS_UP :
5560                         TP_CMOS_BRIGHTNESS_DOWN;
5561         inc = (value > current_value) ? 1 : -1;
5562
5563         for (i = current_value; i != value; i += inc)
5564                 if (issue_thinkpad_cmos_command(cmos_cmd))
5565                         return -EIO;
5566
5567         return 0;
5568 }
5569
5570 /* May return EINTR which can always be mapped to ERESTARTSYS */
5571 static int brightness_set(unsigned int value)
5572 {
5573         int res;
5574
5575         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5576             value < 0)
5577                 return -EINVAL;
5578
5579         vdbg_printk(TPACPI_DBG_BRGHT,
5580                         "set backlight level to %d\n", value);
5581
5582         res = mutex_lock_killable(&brightness_mutex);
5583         if (res < 0)
5584                 return res;
5585
5586         switch (brightness_mode) {
5587         case TPACPI_BRGHT_MODE_EC:
5588         case TPACPI_BRGHT_MODE_ECNVRAM:
5589                 res = tpacpi_brightness_set_ec(value);
5590                 break;
5591         case TPACPI_BRGHT_MODE_UCMS_STEP:
5592                 res = tpacpi_brightness_set_ucmsstep(value);
5593                 break;
5594         default:
5595                 res = -ENXIO;
5596         }
5597
5598         mutex_unlock(&brightness_mutex);
5599         return res;
5600 }
5601
5602 /* sysfs backlight class ----------------------------------------------- */
5603
5604 static int brightness_update_status(struct backlight_device *bd)
5605 {
5606         unsigned int level =
5607                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5608                  bd->props.power == FB_BLANK_UNBLANK) ?
5609                                 bd->props.brightness : 0;
5610
5611         dbg_printk(TPACPI_DBG_BRGHT,
5612                         "backlight: attempt to set level to %d\n",
5613                         level);
5614
5615         /* it is the backlight class's job (caller) to handle
5616          * EINTR and other errors properly */
5617         return brightness_set(level);
5618 }
5619
5620 static int brightness_get(struct backlight_device *bd)
5621 {
5622         int status, res;
5623
5624         res = mutex_lock_killable(&brightness_mutex);
5625         if (res < 0)
5626                 return 0;
5627
5628         res = tpacpi_brightness_get_raw(&status);
5629
5630         mutex_unlock(&brightness_mutex);
5631
5632         if (res < 0)
5633                 return 0;
5634
5635         return status & TP_EC_BACKLIGHT_LVLMSK;
5636 }
5637
5638 static struct backlight_ops ibm_backlight_data = {
5639         .get_brightness = brightness_get,
5640         .update_status  = brightness_update_status,
5641 };
5642
5643 /* --------------------------------------------------------------------- */
5644
5645 /*
5646  * These are only useful for models that have only one possibility
5647  * of GPU.  If the BIOS model handles both ATI and Intel, don't use
5648  * these quirks.
5649  */
5650 #define TPACPI_BRGHT_Q_NOEC     0x0001  /* Must NOT use EC HBRV */
5651 #define TPACPI_BRGHT_Q_EC       0x0002  /* Should or must use EC HBRV */
5652 #define TPACPI_BRGHT_Q_ASK      0x8000  /* Ask for user report */
5653
5654 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = {
5655         /* Models with ATI GPUs known to require ECNVRAM mode */
5656         TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC),      /* T43/p ATI */
5657
5658         /* Models with ATI GPUs (waiting confirmation) */
5659         TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5660         TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5661         TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5662         TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC),
5663
5664         /* Models with Intel Extreme Graphics 2 (waiting confirmation) */
5665         TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5666         TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5667         TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_NOEC),
5668
5669         /* Models with Intel GMA900 */
5670         TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC),    /* T43, R52 */
5671         TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC),    /* X41 */
5672         TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC),    /* X41 Tablet */
5673 };
5674
5675 static int __init brightness_init(struct ibm_init_struct *iibm)
5676 {
5677         int b;
5678         unsigned long quirks;
5679
5680         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5681
5682         mutex_init(&brightness_mutex);
5683
5684         quirks = tpacpi_check_quirks(brightness_quirk_table,
5685                                 ARRAY_SIZE(brightness_quirk_table));
5686
5687         /*
5688          * We always attempt to detect acpi support, so as to switch
5689          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5690          * going to publish a backlight interface
5691          */
5692         b = tpacpi_check_std_acpi_brightness_support();
5693         if (b > 0) {
5694
5695                 if (acpi_video_backlight_support()) {
5696                         if (brightness_enable > 1) {
5697                                 printk(TPACPI_NOTICE
5698                                        "Standard ACPI backlight interface "
5699                                        "available, not loading native one.\n");
5700                                 return 1;
5701                         } else if (brightness_enable == 1) {
5702                                 printk(TPACPI_NOTICE
5703                                        "Backlight control force enabled, even if standard "
5704                                        "ACPI backlight interface is available\n");
5705                         }
5706                 } else {
5707                         if (brightness_enable > 1) {
5708                                 printk(TPACPI_NOTICE
5709                                        "Standard ACPI backlight interface not "
5710                                        "available, thinkpad_acpi native "
5711                                        "brightness control enabled\n");
5712                         }
5713                 }
5714         }
5715
5716         if (!brightness_enable) {
5717                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5718                            "brightness support disabled by "
5719                            "module parameter\n");
5720                 return 1;
5721         }
5722
5723         if (b > 16) {
5724                 printk(TPACPI_ERR
5725                        "Unsupported brightness interface, "
5726                        "please contact %s\n", TPACPI_MAIL);
5727                 return 1;
5728         }
5729         if (b == 16)
5730                 tp_features.bright_16levels = 1;
5731
5732         /*
5733          * Check for module parameter bogosity, note that we
5734          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5735          * able to detect "unspecified"
5736          */
5737         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5738                 return -EINVAL;
5739
5740         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5741         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5742             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5743                 if (quirks & TPACPI_BRGHT_Q_EC)
5744                         brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5745                 else
5746                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5747
5748                 dbg_printk(TPACPI_DBG_BRGHT,
5749                            "driver auto-selected brightness_mode=%d\n",
5750                            brightness_mode);
5751         }
5752
5753         /* Safety */
5754         if (thinkpad_id.vendor != PCI_VENDOR_ID_IBM &&
5755             (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM ||
5756              brightness_mode == TPACPI_BRGHT_MODE_EC))
5757                 return -EINVAL;
5758
5759         if (tpacpi_brightness_get_raw(&b) < 0)
5760                 return 1;
5761
5762         if (tp_features.bright_16levels)
5763                 printk(TPACPI_INFO
5764                        "detected a 16-level brightness capable ThinkPad\n");
5765
5766         ibm_backlight_device = backlight_device_register(
5767                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5768                                         &ibm_backlight_data);
5769         if (IS_ERR(ibm_backlight_device)) {
5770                 printk(TPACPI_ERR "Could not register backlight device\n");
5771                 return PTR_ERR(ibm_backlight_device);
5772         }
5773         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5774                         "brightness is supported\n");
5775
5776         if (quirks & TPACPI_BRGHT_Q_ASK) {
5777                 printk(TPACPI_NOTICE
5778                         "brightness: will use unverified default: "
5779                         "brightness_mode=%d\n", brightness_mode);
5780                 printk(TPACPI_NOTICE
5781                         "brightness: please report to %s whether it works well "
5782                         "or not on your ThinkPad\n", TPACPI_MAIL);
5783         }
5784
5785         ibm_backlight_device->props.max_brightness =
5786                                 (tp_features.bright_16levels)? 15 : 7;
5787         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5788         backlight_update_status(ibm_backlight_device);
5789
5790         return 0;
5791 }
5792
5793 static void brightness_suspend(pm_message_t state)
5794 {
5795         tpacpi_brightness_checkpoint_nvram();
5796 }
5797
5798 static void brightness_shutdown(void)
5799 {
5800         tpacpi_brightness_checkpoint_nvram();
5801 }
5802
5803 static void brightness_exit(void)
5804 {
5805         if (ibm_backlight_device) {
5806                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5807                             "calling backlight_device_unregister()\n");
5808                 backlight_device_unregister(ibm_backlight_device);
5809         }
5810
5811         tpacpi_brightness_checkpoint_nvram();
5812 }
5813
5814 static int brightness_read(char *p)
5815 {
5816         int len = 0;
5817         int level;
5818
5819         level = brightness_get(NULL);
5820         if (level < 0) {
5821                 len += sprintf(p + len, "level:\t\tunreadable\n");
5822         } else {
5823                 len += sprintf(p + len, "level:\t\t%d\n", level);
5824                 len += sprintf(p + len, "commands:\tup, down\n");
5825                 len += sprintf(p + len, "commands:\tlevel <level>"
5826                                " (<level> is 0-%d)\n",
5827                                (tp_features.bright_16levels) ? 15 : 7);
5828         }
5829
5830         return len;
5831 }
5832
5833 static int brightness_write(char *buf)
5834 {
5835         int level;
5836         int rc;
5837         char *cmd;
5838         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5839
5840         level = brightness_get(NULL);
5841         if (level < 0)
5842                 return level;
5843
5844         while ((cmd = next_cmd(&buf))) {
5845                 if (strlencmp(cmd, "up") == 0) {
5846                         if (level < max_level)
5847                                 level++;
5848                 } else if (strlencmp(cmd, "down") == 0) {
5849                         if (level > 0)
5850                                 level--;
5851                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5852                            level >= 0 && level <= max_level) {
5853                         /* new level set */
5854                 } else
5855                         return -EINVAL;
5856         }
5857
5858         tpacpi_disclose_usertask("procfs brightness",
5859                         "set level to %d\n", level);
5860
5861         /*
5862          * Now we know what the final level should be, so we try to set it.
5863          * Doing it this way makes the syscall restartable in case of EINTR
5864          */
5865         rc = brightness_set(level);
5866         return (rc == -EINTR)? ERESTARTSYS : rc;
5867 }
5868
5869 static struct ibm_struct brightness_driver_data = {
5870         .name = "brightness",
5871         .read = brightness_read,
5872         .write = brightness_write,
5873         .exit = brightness_exit,
5874         .suspend = brightness_suspend,
5875         .shutdown = brightness_shutdown,
5876 };
5877
5878 /*************************************************************************
5879  * Volume subdriver
5880  */
5881
5882 static int volume_offset = 0x30;
5883
5884 static int volume_read(char *p)
5885 {
5886         int len = 0;
5887         u8 level;
5888
5889         if (!acpi_ec_read(volume_offset, &level)) {
5890                 len += sprintf(p + len, "level:\t\tunreadable\n");
5891         } else {
5892                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5893                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5894                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5895                 len += sprintf(p + len, "commands:\tlevel <level>"
5896                                " (<level> is 0-15)\n");
5897         }
5898
5899         return len;
5900 }
5901
5902 static int volume_write(char *buf)
5903 {
5904         int cmos_cmd, inc, i;
5905         u8 level, mute;
5906         int new_level, new_mute;
5907         char *cmd;
5908
5909         while ((cmd = next_cmd(&buf))) {
5910                 if (!acpi_ec_read(volume_offset, &level))
5911                         return -EIO;
5912                 new_mute = mute = level & 0x40;
5913                 new_level = level = level & 0xf;
5914
5915                 if (strlencmp(cmd, "up") == 0) {
5916                         if (mute)
5917                                 new_mute = 0;
5918                         else
5919                                 new_level = level == 15 ? 15 : level + 1;
5920                 } else if (strlencmp(cmd, "down") == 0) {
5921                         if (mute)
5922                                 new_mute = 0;
5923                         else
5924                                 new_level = level == 0 ? 0 : level - 1;
5925                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5926                            new_level >= 0 && new_level <= 15) {
5927                         /* new_level set */
5928                 } else if (strlencmp(cmd, "mute") == 0) {
5929                         new_mute = 0x40;
5930                 } else
5931                         return -EINVAL;
5932
5933                 if (new_level != level) {
5934                         /* mute doesn't change */
5935
5936                         cmos_cmd = (new_level > level) ?
5937                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5938                         inc = new_level > level ? 1 : -1;
5939
5940                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5941                                      !acpi_ec_write(volume_offset, level)))
5942                                 return -EIO;
5943
5944                         for (i = level; i != new_level; i += inc)
5945                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5946                                     !acpi_ec_write(volume_offset, i + inc))
5947                                         return -EIO;
5948
5949                         if (mute &&
5950                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5951                              !acpi_ec_write(volume_offset, new_level + mute))) {
5952                                 return -EIO;
5953                         }
5954                 }
5955
5956                 if (new_mute != mute) {
5957                         /* level doesn't change */
5958
5959                         cmos_cmd = (new_mute) ?
5960                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5961
5962                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
5963                             !acpi_ec_write(volume_offset, level + new_mute))
5964                                 return -EIO;
5965                 }
5966         }
5967
5968         return 0;
5969 }
5970
5971 static struct ibm_struct volume_driver_data = {
5972         .name = "volume",
5973         .read = volume_read,
5974         .write = volume_write,
5975 };
5976
5977 /*************************************************************************
5978  * Fan subdriver
5979  */
5980
5981 /*
5982  * FAN ACCESS MODES
5983  *
5984  * TPACPI_FAN_RD_ACPI_GFAN:
5985  *      ACPI GFAN method: returns fan level
5986  *
5987  *      see TPACPI_FAN_WR_ACPI_SFAN
5988  *      EC 0x2f (HFSP) not available if GFAN exists
5989  *
5990  * TPACPI_FAN_WR_ACPI_SFAN:
5991  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5992  *
5993  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5994  *      it for writing.
5995  *
5996  * TPACPI_FAN_WR_TPEC:
5997  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5998  *      Supported on almost all ThinkPads
5999  *
6000  *      Fan speed changes of any sort (including those caused by the
6001  *      disengaged mode) are usually done slowly by the firmware as the
6002  *      maximum ammount of fan duty cycle change per second seems to be
6003  *      limited.
6004  *
6005  *      Reading is not available if GFAN exists.
6006  *      Writing is not available if SFAN exists.
6007  *
6008  *      Bits
6009  *       7      automatic mode engaged;
6010  *              (default operation mode of the ThinkPad)
6011  *              fan level is ignored in this mode.
6012  *       6      full speed mode (takes precedence over bit 7);
6013  *              not available on all thinkpads.  May disable
6014  *              the tachometer while the fan controller ramps up
6015  *              the speed (which can take up to a few *minutes*).
6016  *              Speeds up fan to 100% duty-cycle, which is far above
6017  *              the standard RPM levels.  It is not impossible that
6018  *              it could cause hardware damage.
6019  *      5-3     unused in some models.  Extra bits for fan level
6020  *              in others, but still useless as all values above
6021  *              7 map to the same speed as level 7 in these models.
6022  *      2-0     fan level (0..7 usually)
6023  *                      0x00 = stop
6024  *                      0x07 = max (set when temperatures critical)
6025  *              Some ThinkPads may have other levels, see
6026  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6027  *
6028  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6029  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6030  *      does so, its initial value is meaningless (0x07).
6031  *
6032  *      For firmware bugs, refer to:
6033  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6034  *
6035  *      ----
6036  *
6037  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6038  *      Main fan tachometer reading (in RPM)
6039  *
6040  *      This register is present on all ThinkPads with a new-style EC, and
6041  *      it is known not to be present on the A21m/e, and T22, as there is
6042  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6043  *      ThinkPads from this same time period (and earlier) probably lack the
6044  *      tachometer as well.
6045  *
6046  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6047  *      was never fixed by IBM to report the EC firmware version string
6048  *      probably support the tachometer (like the early X models), so
6049  *      detecting it is quite hard.  We need more data to know for sure.
6050  *
6051  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6052  *      might result.
6053  *
6054  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6055  *      mode.
6056  *
6057  *      For firmware bugs, refer to:
6058  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6059  *
6060  *      ----
6061  *
6062  *      ThinkPad EC register 0x31 bit 0 (only on select models)
6063  *
6064  *      When bit 0 of EC register 0x31 is zero, the tachometer registers
6065  *      show the speed of the main fan.  When bit 0 of EC register 0x31
6066  *      is one, the tachometer registers show the speed of the auxiliary
6067  *      fan.
6068  *
6069  *      Fan control seems to affect both fans, regardless of the state
6070  *      of this bit.
6071  *
6072  *      So far, only the firmware for the X60/X61 non-tablet versions
6073  *      seem to support this (firmware TP-7M).
6074  *
6075  * TPACPI_FAN_WR_ACPI_FANS:
6076  *      ThinkPad X31, X40, X41.  Not available in the X60.
6077  *
6078  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6079  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6080  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6081  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6082  *
6083  *      The speeds are stored on handles
6084  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6085  *
6086  *      There are three default speed sets, acessible as handles:
6087  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6088  *
6089  *      ACPI DSDT switches which set is in use depending on various
6090  *      factors.
6091  *
6092  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6093  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6094  *      but the ACPI tables just mention level 7.
6095  */
6096
6097 enum {                                  /* Fan control constants */
6098         fan_status_offset = 0x2f,       /* EC register 0x2f */
6099         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6100                                          * 0x84 must be read before 0x85 */
6101         fan_select_offset = 0x31,       /* EC register 0x31 (Firmware 7M)
6102                                            bit 0 selects which fan is active */
6103
6104         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6105         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6106
6107         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6108 };
6109
6110 enum fan_status_access_mode {
6111         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6112         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6113         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6114 };
6115
6116 enum fan_control_access_mode {
6117         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6118         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6119         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6120         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6121 };
6122
6123 enum fan_control_commands {
6124         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6125         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6126         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6127                                                  * and also watchdog cmd */
6128 };
6129
6130 static int fan_control_allowed;
6131
6132 static enum fan_status_access_mode fan_status_access_mode;
6133 static enum fan_control_access_mode fan_control_access_mode;
6134 static enum fan_control_commands fan_control_commands;
6135
6136 static u8 fan_control_initial_status;
6137 static u8 fan_control_desired_level;
6138 static u8 fan_control_resume_level;
6139 static int fan_watchdog_maxinterval;
6140
6141 static struct mutex fan_mutex;
6142
6143 static void fan_watchdog_fire(struct work_struct *ignored);
6144 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6145
6146 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6147 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6148            "\\FSPD",            /* 600e/x, 770e, 770x */
6149            );                   /* all others */
6150 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6151            "JFNS",              /* 770x-JL */
6152            );                   /* all others */
6153
6154 /*
6155  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6156  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6157  * be in auto mode (0x80).
6158  *
6159  * This is corrected by any write to HFSP either by the driver, or
6160  * by the firmware.
6161  *
6162  * We assume 0x07 really means auto mode while this quirk is active,
6163  * as this is far more likely than the ThinkPad being in level 7,
6164  * which is only used by the firmware during thermal emergencies.
6165  *
6166  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6167  * TP-70 (T43, R52), which are known to be buggy.
6168  */
6169
6170 static void fan_quirk1_setup(void)
6171 {
6172         if (fan_control_initial_status == 0x07) {
6173                 printk(TPACPI_NOTICE
6174                        "fan_init: initial fan status is unknown, "
6175                        "assuming it is in auto mode\n");
6176                 tp_features.fan_ctrl_status_undef = 1;
6177         }
6178 }
6179
6180 static void fan_quirk1_handle(u8 *fan_status)
6181 {
6182         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6183                 if (*fan_status != fan_control_initial_status) {
6184                         /* something changed the HFSP regisnter since
6185                          * driver init time, so it is not undefined
6186                          * anymore */
6187                         tp_features.fan_ctrl_status_undef = 0;
6188                 } else {
6189                         /* Return most likely status. In fact, it
6190                          * might be the only possible status */
6191                         *fan_status = TP_EC_FAN_AUTO;
6192                 }
6193         }
6194 }
6195
6196 /* Select main fan on X60/X61, NOOP on others */
6197 static bool fan_select_fan1(void)
6198 {
6199         if (tp_features.second_fan) {
6200                 u8 val;
6201
6202                 if (ec_read(fan_select_offset, &val) < 0)
6203                         return false;
6204                 val &= 0xFEU;
6205                 if (ec_write(fan_select_offset, val) < 0)
6206                         return false;
6207         }
6208         return true;
6209 }
6210
6211 /* Select secondary fan on X60/X61 */
6212 static bool fan_select_fan2(void)
6213 {
6214         u8 val;
6215
6216         if (!tp_features.second_fan)
6217                 return false;
6218
6219         if (ec_read(fan_select_offset, &val) < 0)
6220                 return false;
6221         val |= 0x01U;
6222         if (ec_write(fan_select_offset, val) < 0)
6223                 return false;
6224
6225         return true;
6226 }
6227
6228 /*
6229  * Call with fan_mutex held
6230  */
6231 static void fan_update_desired_level(u8 status)
6232 {
6233         if ((status &
6234              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6235                 if (status > 7)
6236                         fan_control_desired_level = 7;
6237                 else
6238                         fan_control_desired_level = status;
6239         }
6240 }
6241
6242 static int fan_get_status(u8 *status)
6243 {
6244         u8 s;
6245
6246         /* TODO:
6247          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6248
6249         switch (fan_status_access_mode) {
6250         case TPACPI_FAN_RD_ACPI_GFAN:
6251                 /* 570, 600e/x, 770e, 770x */
6252
6253                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6254                         return -EIO;
6255
6256                 if (likely(status))
6257                         *status = s & 0x07;
6258
6259                 break;
6260
6261         case TPACPI_FAN_RD_TPEC:
6262                 /* all except 570, 600e/x, 770e, 770x */
6263                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6264                         return -EIO;
6265
6266                 if (likely(status)) {
6267                         *status = s;
6268                         fan_quirk1_handle(status);
6269                 }
6270
6271                 break;
6272
6273         default:
6274                 return -ENXIO;
6275         }
6276
6277         return 0;
6278 }
6279
6280 static int fan_get_status_safe(u8 *status)
6281 {
6282         int rc;
6283         u8 s;
6284
6285         if (mutex_lock_killable(&fan_mutex))
6286                 return -ERESTARTSYS;
6287         rc = fan_get_status(&s);
6288         if (!rc)
6289                 fan_update_desired_level(s);
6290         mutex_unlock(&fan_mutex);
6291
6292         if (status)
6293                 *status = s;
6294
6295         return rc;
6296 }
6297
6298 static int fan_get_speed(unsigned int *speed)
6299 {
6300         u8 hi, lo;
6301
6302         switch (fan_status_access_mode) {
6303         case TPACPI_FAN_RD_TPEC:
6304                 /* all except 570, 600e/x, 770e, 770x */
6305                 if (unlikely(!fan_select_fan1()))
6306                         return -EIO;
6307                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6308                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6309                         return -EIO;
6310
6311                 if (likely(speed))
6312                         *speed = (hi << 8) | lo;
6313
6314                 break;
6315
6316         default:
6317                 return -ENXIO;
6318         }
6319
6320         return 0;
6321 }
6322
6323 static int fan2_get_speed(unsigned int *speed)
6324 {
6325         u8 hi, lo;
6326         bool rc;
6327
6328         switch (fan_status_access_mode) {
6329         case TPACPI_FAN_RD_TPEC:
6330                 /* all except 570, 600e/x, 770e, 770x */
6331                 if (unlikely(!fan_select_fan2()))
6332                         return -EIO;
6333                 rc = !acpi_ec_read(fan_rpm_offset, &lo) ||
6334                              !acpi_ec_read(fan_rpm_offset + 1, &hi);
6335                 fan_select_fan1(); /* play it safe */
6336                 if (rc)
6337                         return -EIO;
6338
6339                 if (likely(speed))
6340                         *speed = (hi << 8) | lo;
6341
6342                 break;
6343
6344         default:
6345                 return -ENXIO;
6346         }
6347
6348         return 0;
6349 }
6350
6351 static int fan_set_level(int level)
6352 {
6353         if (!fan_control_allowed)
6354                 return -EPERM;
6355
6356         switch (fan_control_access_mode) {
6357         case TPACPI_FAN_WR_ACPI_SFAN:
6358                 if (level >= 0 && level <= 7) {
6359                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6360                                 return -EIO;
6361                 } else
6362                         return -EINVAL;
6363                 break;
6364
6365         case TPACPI_FAN_WR_ACPI_FANS:
6366         case TPACPI_FAN_WR_TPEC:
6367                 if (!(level & TP_EC_FAN_AUTO) &&
6368                     !(level & TP_EC_FAN_FULLSPEED) &&
6369                     ((level < 0) || (level > 7)))
6370                         return -EINVAL;
6371
6372                 /* safety net should the EC not support AUTO
6373                  * or FULLSPEED mode bits and just ignore them */
6374                 if (level & TP_EC_FAN_FULLSPEED)
6375                         level |= 7;     /* safety min speed 7 */
6376                 else if (level & TP_EC_FAN_AUTO)
6377                         level |= 4;     /* safety min speed 4 */
6378
6379                 if (!acpi_ec_write(fan_status_offset, level))
6380                         return -EIO;
6381                 else
6382                         tp_features.fan_ctrl_status_undef = 0;
6383                 break;
6384
6385         default:
6386                 return -ENXIO;
6387         }
6388
6389         vdbg_printk(TPACPI_DBG_FAN,
6390                 "fan control: set fan control register to 0x%02x\n", level);
6391         return 0;
6392 }
6393
6394 static int fan_set_level_safe(int level)
6395 {
6396         int rc;
6397
6398         if (!fan_control_allowed)
6399                 return -EPERM;
6400
6401         if (mutex_lock_killable(&fan_mutex))
6402                 return -ERESTARTSYS;
6403
6404         if (level == TPACPI_FAN_LAST_LEVEL)
6405                 level = fan_control_desired_level;
6406
6407         rc = fan_set_level(level);
6408         if (!rc)
6409                 fan_update_desired_level(level);
6410
6411         mutex_unlock(&fan_mutex);
6412         return rc;
6413 }
6414
6415 static int fan_set_enable(void)
6416 {
6417         u8 s;
6418         int rc;
6419
6420         if (!fan_control_allowed)
6421                 return -EPERM;
6422
6423         if (mutex_lock_killable(&fan_mutex))
6424                 return -ERESTARTSYS;
6425
6426         switch (fan_control_access_mode) {
6427         case TPACPI_FAN_WR_ACPI_FANS:
6428         case TPACPI_FAN_WR_TPEC:
6429                 rc = fan_get_status(&s);
6430                 if (rc < 0)
6431                         break;
6432
6433                 /* Don't go out of emergency fan mode */
6434                 if (s != 7) {
6435                         s &= 0x07;
6436                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6437                 }
6438
6439                 if (!acpi_ec_write(fan_status_offset, s))
6440                         rc = -EIO;
6441                 else {
6442                         tp_features.fan_ctrl_status_undef = 0;
6443                         rc = 0;
6444                 }
6445                 break;
6446
6447         case TPACPI_FAN_WR_ACPI_SFAN:
6448                 rc = fan_get_status(&s);
6449                 if (rc < 0)
6450                         break;
6451
6452                 s &= 0x07;
6453
6454                 /* Set fan to at least level 4 */
6455                 s |= 4;
6456
6457                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6458                         rc = -EIO;
6459                 else
6460                         rc = 0;
6461                 break;
6462
6463         default:
6464                 rc = -ENXIO;
6465         }
6466
6467         mutex_unlock(&fan_mutex);
6468
6469         if (!rc)
6470                 vdbg_printk(TPACPI_DBG_FAN,
6471                         "fan control: set fan control register to 0x%02x\n",
6472                         s);
6473         return rc;
6474 }
6475
6476 static int fan_set_disable(void)
6477 {
6478         int rc;
6479
6480         if (!fan_control_allowed)
6481                 return -EPERM;
6482
6483         if (mutex_lock_killable(&fan_mutex))
6484                 return -ERESTARTSYS;
6485
6486         rc = 0;
6487         switch (fan_control_access_mode) {
6488         case TPACPI_FAN_WR_ACPI_FANS:
6489         case TPACPI_FAN_WR_TPEC:
6490                 if (!acpi_ec_write(fan_status_offset, 0x00))
6491                         rc = -EIO;
6492                 else {
6493                         fan_control_desired_level = 0;
6494                         tp_features.fan_ctrl_status_undef = 0;
6495                 }
6496                 break;
6497
6498         case TPACPI_FAN_WR_ACPI_SFAN:
6499                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6500                         rc = -EIO;
6501                 else
6502                         fan_control_desired_level = 0;
6503                 break;
6504
6505         default:
6506                 rc = -ENXIO;
6507         }
6508
6509         if (!rc)
6510                 vdbg_printk(TPACPI_DBG_FAN,
6511                         "fan control: set fan control register to 0\n");
6512
6513         mutex_unlock(&fan_mutex);
6514         return rc;
6515 }
6516
6517 static int fan_set_speed(int speed)
6518 {
6519         int rc;
6520
6521         if (!fan_control_allowed)
6522                 return -EPERM;
6523
6524         if (mutex_lock_killable(&fan_mutex))
6525                 return -ERESTARTSYS;
6526
6527         rc = 0;
6528         switch (fan_control_access_mode) {
6529         case TPACPI_FAN_WR_ACPI_FANS:
6530                 if (speed >= 0 && speed <= 65535) {
6531                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6532                                         speed, speed, speed))
6533                                 rc = -EIO;
6534                 } else
6535                         rc = -EINVAL;
6536                 break;
6537
6538         default:
6539                 rc = -ENXIO;
6540         }
6541
6542         mutex_unlock(&fan_mutex);
6543         return rc;
6544 }
6545
6546 static void fan_watchdog_reset(void)
6547 {
6548         static int fan_watchdog_active;
6549
6550         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6551                 return;
6552
6553         if (fan_watchdog_active)
6554                 cancel_delayed_work(&fan_watchdog_task);
6555
6556         if (fan_watchdog_maxinterval > 0 &&
6557             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6558                 fan_watchdog_active = 1;
6559                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6560                                 msecs_to_jiffies(fan_watchdog_maxinterval
6561                                                  * 1000))) {
6562                         printk(TPACPI_ERR
6563                                "failed to queue the fan watchdog, "
6564                                "watchdog will not trigger\n");
6565                 }
6566         } else
6567                 fan_watchdog_active = 0;
6568 }
6569
6570 static void fan_watchdog_fire(struct work_struct *ignored)
6571 {
6572         int rc;
6573
6574         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6575                 return;
6576
6577         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6578         rc = fan_set_enable();
6579         if (rc < 0) {
6580                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6581                         "will try again later...\n", -rc);
6582                 /* reschedule for later */
6583                 fan_watchdog_reset();
6584         }
6585 }
6586
6587 /*
6588  * SYSFS fan layout: hwmon compatible (device)
6589  *
6590  * pwm*_enable:
6591  *      0: "disengaged" mode
6592  *      1: manual mode
6593  *      2: native EC "auto" mode (recommended, hardware default)
6594  *
6595  * pwm*: set speed in manual mode, ignored otherwise.
6596  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6597  *      interpolation.
6598  *
6599  * fan*_input: tachometer reading, RPM
6600  *
6601  *
6602  * SYSFS fan layout: extensions
6603  *
6604  * fan_watchdog (driver):
6605  *      fan watchdog interval in seconds, 0 disables (default), max 120
6606  */
6607
6608 /* sysfs fan pwm1_enable ----------------------------------------------- */
6609 static ssize_t fan_pwm1_enable_show(struct device *dev,
6610                                     struct device_attribute *attr,
6611                                     char *buf)
6612 {
6613         int res, mode;
6614         u8 status;
6615
6616         res = fan_get_status_safe(&status);
6617         if (res)
6618                 return res;
6619
6620         if (status & TP_EC_FAN_FULLSPEED) {
6621                 mode = 0;
6622         } else if (status & TP_EC_FAN_AUTO) {
6623                 mode = 2;
6624         } else
6625                 mode = 1;
6626
6627         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6628 }
6629
6630 static ssize_t fan_pwm1_enable_store(struct device *dev,
6631                                      struct device_attribute *attr,
6632                                      const char *buf, size_t count)
6633 {
6634         unsigned long t;
6635         int res, level;
6636
6637         if (parse_strtoul(buf, 2, &t))
6638                 return -EINVAL;
6639
6640         tpacpi_disclose_usertask("hwmon pwm1_enable",
6641                         "set fan mode to %lu\n", t);
6642
6643         switch (t) {
6644         case 0:
6645                 level = TP_EC_FAN_FULLSPEED;
6646                 break;
6647         case 1:
6648                 level = TPACPI_FAN_LAST_LEVEL;
6649                 break;
6650         case 2:
6651                 level = TP_EC_FAN_AUTO;
6652                 break;
6653         case 3:
6654                 /* reserved for software-controlled auto mode */
6655                 return -ENOSYS;
6656         default:
6657                 return -EINVAL;
6658         }
6659
6660         res = fan_set_level_safe(level);
6661         if (res == -ENXIO)
6662                 return -EINVAL;
6663         else if (res < 0)
6664                 return res;
6665
6666         fan_watchdog_reset();
6667
6668         return count;
6669 }
6670
6671 static struct device_attribute dev_attr_fan_pwm1_enable =
6672         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6673                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6674
6675 /* sysfs fan pwm1 ------------------------------------------------------ */
6676 static ssize_t fan_pwm1_show(struct device *dev,
6677                              struct device_attribute *attr,
6678                              char *buf)
6679 {
6680         int res;
6681         u8 status;
6682
6683         res = fan_get_status_safe(&status);
6684         if (res)
6685                 return res;
6686
6687         if ((status &
6688              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6689                 status = fan_control_desired_level;
6690
6691         if (status > 7)
6692                 status = 7;
6693
6694         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6695 }
6696
6697 static ssize_t fan_pwm1_store(struct device *dev,
6698                               struct device_attribute *attr,
6699                               const char *buf, size_t count)
6700 {
6701         unsigned long s;
6702         int rc;
6703         u8 status, newlevel;
6704
6705         if (parse_strtoul(buf, 255, &s))
6706                 return -EINVAL;
6707
6708         tpacpi_disclose_usertask("hwmon pwm1",
6709                         "set fan speed to %lu\n", s);
6710
6711         /* scale down from 0-255 to 0-7 */
6712         newlevel = (s >> 5) & 0x07;
6713
6714         if (mutex_lock_killable(&fan_mutex))
6715                 return -ERESTARTSYS;
6716
6717         rc = fan_get_status(&status);
6718         if (!rc && (status &
6719                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6720                 rc = fan_set_level(newlevel);
6721                 if (rc == -ENXIO)
6722                         rc = -EINVAL;
6723                 else if (!rc) {
6724                         fan_update_desired_level(newlevel);
6725                         fan_watchdog_reset();
6726                 }
6727         }
6728
6729         mutex_unlock(&fan_mutex);
6730         return (rc)? rc : count;
6731 }
6732
6733 static struct device_attribute dev_attr_fan_pwm1 =
6734         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6735                 fan_pwm1_show, fan_pwm1_store);
6736
6737 /* sysfs fan fan1_input ------------------------------------------------ */
6738 static ssize_t fan_fan1_input_show(struct device *dev,
6739                            struct device_attribute *attr,
6740                            char *buf)
6741 {
6742         int res;
6743         unsigned int speed;
6744
6745         res = fan_get_speed(&speed);
6746         if (res < 0)
6747                 return res;
6748
6749         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6750 }
6751
6752 static struct device_attribute dev_attr_fan_fan1_input =
6753         __ATTR(fan1_input, S_IRUGO,
6754                 fan_fan1_input_show, NULL);
6755
6756 /* sysfs fan fan2_input ------------------------------------------------ */
6757 static ssize_t fan_fan2_input_show(struct device *dev,
6758                            struct device_attribute *attr,
6759                            char *buf)
6760 {
6761         int res;
6762         unsigned int speed;
6763
6764         res = fan2_get_speed(&speed);
6765         if (res < 0)
6766                 return res;
6767
6768         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6769 }
6770
6771 static struct device_attribute dev_attr_fan_fan2_input =
6772         __ATTR(fan2_input, S_IRUGO,
6773                 fan_fan2_input_show, NULL);
6774
6775 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6776 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6777                                      char *buf)
6778 {
6779         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6780 }
6781
6782 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6783                                       const char *buf, size_t count)
6784 {
6785         unsigned long t;
6786
6787         if (parse_strtoul(buf, 120, &t))
6788                 return -EINVAL;
6789
6790         if (!fan_control_allowed)
6791                 return -EPERM;
6792
6793         fan_watchdog_maxinterval = t;
6794         fan_watchdog_reset();
6795
6796         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6797
6798         return count;
6799 }
6800
6801 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6802                 fan_fan_watchdog_show, fan_fan_watchdog_store);
6803
6804 /* --------------------------------------------------------------------- */
6805 static struct attribute *fan_attributes[] = {
6806         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6807         &dev_attr_fan_fan1_input.attr,
6808         NULL, /* for fan2_input */
6809         NULL
6810 };
6811
6812 static const struct attribute_group fan_attr_group = {
6813         .attrs = fan_attributes,
6814 };
6815
6816 #define TPACPI_FAN_Q1   0x0001          /* Unitialized HFSP */
6817 #define TPACPI_FAN_2FAN 0x0002          /* EC 0x31 bit 0 selects fan2 */
6818
6819 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
6820         { .vendor = PCI_VENDOR_ID_IBM,          \
6821           .bios = TPACPI_MATCH_ANY,             \
6822           .ec = TPID(__id1, __id2),             \
6823           .quirks = __quirks }
6824
6825 #define TPACPI_FAN_QL(__id1, __id2, __quirks)   \
6826         { .vendor = PCI_VENDOR_ID_LENOVO,       \
6827           .bios = TPACPI_MATCH_ANY,             \
6828           .ec = TPID(__id1, __id2),             \
6829           .quirks = __quirks }
6830
6831 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
6832         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
6833         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
6834         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
6835         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
6836         TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN),
6837 };
6838
6839 #undef TPACPI_FAN_QL
6840 #undef TPACPI_FAN_QI
6841
6842 static int __init fan_init(struct ibm_init_struct *iibm)
6843 {
6844         int rc;
6845         unsigned long quirks;
6846
6847         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6848                         "initializing fan subdriver\n");
6849
6850         mutex_init(&fan_mutex);
6851         fan_status_access_mode = TPACPI_FAN_NONE;
6852         fan_control_access_mode = TPACPI_FAN_WR_NONE;
6853         fan_control_commands = 0;
6854         fan_watchdog_maxinterval = 0;
6855         tp_features.fan_ctrl_status_undef = 0;
6856         tp_features.second_fan = 0;
6857         fan_control_desired_level = 7;
6858
6859         TPACPI_ACPIHANDLE_INIT(fans);
6860         TPACPI_ACPIHANDLE_INIT(gfan);
6861         TPACPI_ACPIHANDLE_INIT(sfan);
6862
6863         quirks = tpacpi_check_quirks(fan_quirk_table,
6864                                      ARRAY_SIZE(fan_quirk_table));
6865
6866         if (gfan_handle) {
6867                 /* 570, 600e/x, 770e, 770x */
6868                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6869         } else {
6870                 /* all other ThinkPads: note that even old-style
6871                  * ThinkPad ECs supports the fan control register */
6872                 if (likely(acpi_ec_read(fan_status_offset,
6873                                         &fan_control_initial_status))) {
6874                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6875                         if (quirks & TPACPI_FAN_Q1)
6876                                 fan_quirk1_setup();
6877                         if (quirks & TPACPI_FAN_2FAN) {
6878                                 tp_features.second_fan = 1;
6879                                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6880                                         "secondary fan support enabled\n");
6881                         }
6882                 } else {
6883                         printk(TPACPI_ERR
6884                                "ThinkPad ACPI EC access misbehaving, "
6885                                "fan status and control unavailable\n");
6886                         return 1;
6887                 }
6888         }
6889
6890         if (sfan_handle) {
6891                 /* 570, 770x-JL */
6892                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6893                 fan_control_commands |=
6894                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6895         } else {
6896                 if (!gfan_handle) {
6897                         /* gfan without sfan means no fan control */
6898                         /* all other models implement TP EC 0x2f control */
6899
6900                         if (fans_handle) {
6901                                 /* X31, X40, X41 */
6902                                 fan_control_access_mode =
6903                                     TPACPI_FAN_WR_ACPI_FANS;
6904                                 fan_control_commands |=
6905                                     TPACPI_FAN_CMD_SPEED |
6906                                     TPACPI_FAN_CMD_LEVEL |
6907                                     TPACPI_FAN_CMD_ENABLE;
6908                         } else {
6909                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6910                                 fan_control_commands |=
6911                                     TPACPI_FAN_CMD_LEVEL |
6912                                     TPACPI_FAN_CMD_ENABLE;
6913                         }
6914                 }
6915         }
6916
6917         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6918                 "fan is %s, modes %d, %d\n",
6919                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6920                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
6921                 fan_status_access_mode, fan_control_access_mode);
6922
6923         /* fan control master switch */
6924         if (!fan_control_allowed) {
6925                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6926                 fan_control_commands = 0;
6927                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6928                            "fan control features disabled by parameter\n");
6929         }
6930
6931         /* update fan_control_desired_level */
6932         if (fan_status_access_mode != TPACPI_FAN_NONE)
6933                 fan_get_status_safe(NULL);
6934
6935         if (fan_status_access_mode != TPACPI_FAN_NONE ||
6936             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6937                 if (tp_features.second_fan) {
6938                         /* attach second fan tachometer */
6939                         fan_attributes[ARRAY_SIZE(fan_attributes)-2] =
6940                                         &dev_attr_fan_fan2_input.attr;
6941                 }
6942                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6943                                          &fan_attr_group);
6944                 if (rc < 0)
6945                         return rc;
6946
6947                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6948                                         &driver_attr_fan_watchdog);
6949                 if (rc < 0) {
6950                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6951                                         &fan_attr_group);
6952                         return rc;
6953                 }
6954                 return 0;
6955         } else
6956                 return 1;
6957 }
6958
6959 static void fan_exit(void)
6960 {
6961         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
6962                     "cancelling any pending fan watchdog tasks\n");
6963
6964         /* FIXME: can we really do this unconditionally? */
6965         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6966         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6967                            &driver_attr_fan_watchdog);
6968
6969         cancel_delayed_work(&fan_watchdog_task);
6970         flush_workqueue(tpacpi_wq);
6971 }
6972
6973 static void fan_suspend(pm_message_t state)
6974 {
6975         int rc;
6976
6977         if (!fan_control_allowed)
6978                 return;
6979
6980         /* Store fan status in cache */
6981         fan_control_resume_level = 0;
6982         rc = fan_get_status_safe(&fan_control_resume_level);
6983         if (rc < 0)
6984                 printk(TPACPI_NOTICE
6985                         "failed to read fan level for later "
6986                         "restore during resume: %d\n", rc);
6987
6988         /* if it is undefined, don't attempt to restore it.
6989          * KEEP THIS LAST */
6990         if (tp_features.fan_ctrl_status_undef)
6991                 fan_control_resume_level = 0;
6992 }
6993
6994 static void fan_resume(void)
6995 {
6996         u8 current_level = 7;
6997         bool do_set = false;
6998         int rc;
6999
7000         /* DSDT *always* updates status on resume */
7001         tp_features.fan_ctrl_status_undef = 0;
7002
7003         if (!fan_control_allowed ||
7004             !fan_control_resume_level ||
7005             (fan_get_status_safe(&current_level) < 0))
7006                 return;
7007
7008         switch (fan_control_access_mode) {
7009         case TPACPI_FAN_WR_ACPI_SFAN:
7010                 /* never decrease fan level */
7011                 do_set = (fan_control_resume_level > current_level);
7012                 break;
7013         case TPACPI_FAN_WR_ACPI_FANS:
7014         case TPACPI_FAN_WR_TPEC:
7015                 /* never decrease fan level, scale is:
7016                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7017                  *
7018                  * We expect the firmware to set either 7 or AUTO, but we
7019                  * handle FULLSPEED out of paranoia.
7020                  *
7021                  * So, we can safely only restore FULLSPEED or 7, anything
7022                  * else could slow the fan.  Restoring AUTO is useless, at
7023                  * best that's exactly what the DSDT already set (it is the
7024                  * slower it uses).
7025                  *
7026                  * Always keep in mind that the DSDT *will* have set the
7027                  * fans to what the vendor supposes is the best level.  We
7028                  * muck with it only to speed the fan up.
7029                  */
7030                 if (fan_control_resume_level != 7 &&
7031                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7032                         return;
7033                 else
7034                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7035                                  (current_level != fan_control_resume_level);
7036                 break;
7037         default:
7038                 return;
7039         }
7040         if (do_set) {
7041                 printk(TPACPI_NOTICE
7042                         "restoring fan level to 0x%02x\n",
7043                         fan_control_resume_level);
7044                 rc = fan_set_level_safe(fan_control_resume_level);
7045                 if (rc < 0)
7046                         printk(TPACPI_NOTICE
7047                                 "failed to restore fan level: %d\n", rc);
7048         }
7049 }
7050
7051 static int fan_read(char *p)
7052 {
7053         int len = 0;
7054         int rc;
7055         u8 status;
7056         unsigned int speed = 0;
7057
7058         switch (fan_status_access_mode) {
7059         case TPACPI_FAN_RD_ACPI_GFAN:
7060                 /* 570, 600e/x, 770e, 770x */
7061                 rc = fan_get_status_safe(&status);
7062                 if (rc < 0)
7063                         return rc;
7064
7065                 len += sprintf(p + len, "status:\t\t%s\n"
7066                                "level:\t\t%d\n",
7067                                (status != 0) ? "enabled" : "disabled", status);
7068                 break;
7069
7070         case TPACPI_FAN_RD_TPEC:
7071                 /* all except 570, 600e/x, 770e, 770x */
7072                 rc = fan_get_status_safe(&status);
7073                 if (rc < 0)
7074                         return rc;
7075
7076                 len += sprintf(p + len, "status:\t\t%s\n",
7077                                (status != 0) ? "enabled" : "disabled");
7078
7079                 rc = fan_get_speed(&speed);
7080                 if (rc < 0)
7081                         return rc;
7082
7083                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7084
7085                 if (status & TP_EC_FAN_FULLSPEED)
7086                         /* Disengaged mode takes precedence */
7087                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7088                 else if (status & TP_EC_FAN_AUTO)
7089                         len += sprintf(p + len, "level:\t\tauto\n");
7090                 else
7091                         len += sprintf(p + len, "level:\t\t%d\n", status);
7092                 break;
7093
7094         case TPACPI_FAN_NONE:
7095         default:
7096                 len += sprintf(p + len, "status:\t\tnot supported\n");
7097         }
7098
7099         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7100                 len += sprintf(p + len, "commands:\tlevel <level>");
7101
7102                 switch (fan_control_access_mode) {
7103                 case TPACPI_FAN_WR_ACPI_SFAN:
7104                         len += sprintf(p + len, " (<level> is 0-7)\n");
7105                         break;
7106
7107                 default:
7108                         len += sprintf(p + len, " (<level> is 0-7, "
7109                                        "auto, disengaged, full-speed)\n");
7110                         break;
7111                 }
7112         }
7113
7114         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7115                 len += sprintf(p + len, "commands:\tenable, disable\n"
7116                                "commands:\twatchdog <timeout> (<timeout> "
7117                                "is 0 (off), 1-120 (seconds))\n");
7118
7119         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7120                 len += sprintf(p + len, "commands:\tspeed <speed>"
7121                                " (<speed> is 0-65535)\n");
7122
7123         return len;
7124 }
7125
7126 static int fan_write_cmd_level(const char *cmd, int *rc)
7127 {
7128         int level;
7129
7130         if (strlencmp(cmd, "level auto") == 0)
7131                 level = TP_EC_FAN_AUTO;
7132         else if ((strlencmp(cmd, "level disengaged") == 0) |
7133                         (strlencmp(cmd, "level full-speed") == 0))
7134                 level = TP_EC_FAN_FULLSPEED;
7135         else if (sscanf(cmd, "level %d", &level) != 1)
7136                 return 0;
7137
7138         *rc = fan_set_level_safe(level);
7139         if (*rc == -ENXIO)
7140                 printk(TPACPI_ERR "level command accepted for unsupported "
7141                        "access mode %d", fan_control_access_mode);
7142         else if (!*rc)
7143                 tpacpi_disclose_usertask("procfs fan",
7144                         "set level to %d\n", level);
7145
7146         return 1;
7147 }
7148
7149 static int fan_write_cmd_enable(const char *cmd, int *rc)
7150 {
7151         if (strlencmp(cmd, "enable") != 0)
7152                 return 0;
7153
7154         *rc = fan_set_enable();
7155         if (*rc == -ENXIO)
7156                 printk(TPACPI_ERR "enable command accepted for unsupported "
7157                        "access mode %d", fan_control_access_mode);
7158         else if (!*rc)
7159                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7160
7161         return 1;
7162 }
7163
7164 static int fan_write_cmd_disable(const char *cmd, int *rc)
7165 {
7166         if (strlencmp(cmd, "disable") != 0)
7167                 return 0;
7168
7169         *rc = fan_set_disable();
7170         if (*rc == -ENXIO)
7171                 printk(TPACPI_ERR "disable command accepted for unsupported "
7172                        "access mode %d", fan_control_access_mode);
7173         else if (!*rc)
7174                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7175
7176         return 1;
7177 }
7178
7179 static int fan_write_cmd_speed(const char *cmd, int *rc)
7180 {
7181         int speed;
7182
7183         /* TODO:
7184          * Support speed <low> <medium> <high> ? */
7185
7186         if (sscanf(cmd, "speed %d", &speed) != 1)
7187                 return 0;
7188
7189         *rc = fan_set_speed(speed);
7190         if (*rc == -ENXIO)
7191                 printk(TPACPI_ERR "speed command accepted for unsupported "
7192                        "access mode %d", fan_control_access_mode);
7193         else if (!*rc)
7194                 tpacpi_disclose_usertask("procfs fan",
7195                         "set speed to %d\n", speed);
7196
7197         return 1;
7198 }
7199
7200 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7201 {
7202         int interval;
7203
7204         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7205                 return 0;
7206
7207         if (interval < 0 || interval > 120)
7208                 *rc = -EINVAL;
7209         else {
7210                 fan_watchdog_maxinterval = interval;
7211                 tpacpi_disclose_usertask("procfs fan",
7212                         "set watchdog timer to %d\n",
7213                         interval);
7214         }
7215
7216         return 1;
7217 }
7218
7219 static int fan_write(char *buf)
7220 {
7221         char *cmd;
7222         int rc = 0;
7223
7224         while (!rc && (cmd = next_cmd(&buf))) {
7225                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7226                       fan_write_cmd_level(cmd, &rc)) &&
7227                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7228                       (fan_write_cmd_enable(cmd, &rc) ||
7229                        fan_write_cmd_disable(cmd, &rc) ||
7230                        fan_write_cmd_watchdog(cmd, &rc))) &&
7231                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7232                       fan_write_cmd_speed(cmd, &rc))
7233                     )
7234                         rc = -EINVAL;
7235                 else if (!rc)
7236                         fan_watchdog_reset();
7237         }
7238
7239         return rc;
7240 }
7241
7242 static struct ibm_struct fan_driver_data = {
7243         .name = "fan",
7244         .read = fan_read,
7245         .write = fan_write,
7246         .exit = fan_exit,
7247         .suspend = fan_suspend,
7248         .resume = fan_resume,
7249 };
7250
7251 /****************************************************************************
7252  ****************************************************************************
7253  *
7254  * Infrastructure
7255  *
7256  ****************************************************************************
7257  ****************************************************************************/
7258
7259 /* sysfs name ---------------------------------------------------------- */
7260 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7261                            struct device_attribute *attr,
7262                            char *buf)
7263 {
7264         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7265 }
7266
7267 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7268         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7269
7270 /* --------------------------------------------------------------------- */
7271
7272 /* /proc support */
7273 static struct proc_dir_entry *proc_dir;
7274
7275 /*
7276  * Module and infrastructure proble, init and exit handling
7277  */
7278
7279 static int force_load;
7280
7281 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7282 static const char * __init str_supported(int is_supported)
7283 {
7284         static char text_unsupported[] __initdata = "not supported";
7285
7286         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7287 }
7288 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7289
7290 static void ibm_exit(struct ibm_struct *ibm)
7291 {
7292         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7293
7294         list_del_init(&ibm->all_drivers);
7295
7296         if (ibm->flags.acpi_notify_installed) {
7297                 dbg_printk(TPACPI_DBG_EXIT,
7298                         "%s: acpi_remove_notify_handler\n", ibm->name);
7299                 BUG_ON(!ibm->acpi);
7300                 acpi_remove_notify_handler(*ibm->acpi->handle,
7301                                            ibm->acpi->type,
7302                                            dispatch_acpi_notify);
7303                 ibm->flags.acpi_notify_installed = 0;
7304                 ibm->flags.acpi_notify_installed = 0;
7305         }
7306
7307         if (ibm->flags.proc_created) {
7308                 dbg_printk(TPACPI_DBG_EXIT,
7309                         "%s: remove_proc_entry\n", ibm->name);
7310                 remove_proc_entry(ibm->name, proc_dir);
7311                 ibm->flags.proc_created = 0;
7312         }
7313
7314         if (ibm->flags.acpi_driver_registered) {
7315                 dbg_printk(TPACPI_DBG_EXIT,
7316                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7317                 BUG_ON(!ibm->acpi);
7318                 acpi_bus_unregister_driver(ibm->acpi->driver);
7319                 kfree(ibm->acpi->driver);
7320                 ibm->acpi->driver = NULL;
7321                 ibm->flags.acpi_driver_registered = 0;
7322         }
7323
7324         if (ibm->flags.init_called && ibm->exit) {
7325                 ibm->exit();
7326                 ibm->flags.init_called = 0;
7327         }
7328
7329         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7330 }
7331
7332 static int __init ibm_init(struct ibm_init_struct *iibm)
7333 {
7334         int ret;
7335         struct ibm_struct *ibm = iibm->data;
7336         struct proc_dir_entry *entry;
7337
7338         BUG_ON(ibm == NULL);
7339
7340         INIT_LIST_HEAD(&ibm->all_drivers);
7341
7342         if (ibm->flags.experimental && !experimental)
7343                 return 0;
7344
7345         dbg_printk(TPACPI_DBG_INIT,
7346                 "probing for %s\n", ibm->name);
7347
7348         if (iibm->init) {
7349                 ret = iibm->init(iibm);
7350                 if (ret > 0)
7351                         return 0;       /* probe failed */
7352                 if (ret)
7353                         return ret;
7354
7355                 ibm->flags.init_called = 1;
7356         }
7357
7358         if (ibm->acpi) {
7359                 if (ibm->acpi->hid) {
7360                         ret = register_tpacpi_subdriver(ibm);
7361                         if (ret)
7362                                 goto err_out;
7363                 }
7364
7365                 if (ibm->acpi->notify) {
7366                         ret = setup_acpi_notify(ibm);
7367                         if (ret == -ENODEV) {
7368                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7369                                         ibm->name);
7370                                 ret = 0;
7371                                 goto err_out;
7372                         }
7373                         if (ret < 0)
7374                                 goto err_out;
7375                 }
7376         }
7377
7378         dbg_printk(TPACPI_DBG_INIT,
7379                 "%s installed\n", ibm->name);
7380
7381         if (ibm->read) {
7382                 entry = create_proc_entry(ibm->name,
7383                                           S_IFREG | S_IRUGO | S_IWUSR,
7384                                           proc_dir);
7385                 if (!entry) {
7386                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7387                                ibm->name);
7388                         ret = -ENODEV;
7389                         goto err_out;
7390                 }
7391                 entry->data = ibm;
7392                 entry->read_proc = &dispatch_procfs_read;
7393                 if (ibm->write)
7394                         entry->write_proc = &dispatch_procfs_write;
7395                 ibm->flags.proc_created = 1;
7396         }
7397
7398         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7399
7400         return 0;
7401
7402 err_out:
7403         dbg_printk(TPACPI_DBG_INIT,
7404                 "%s: at error exit path with result %d\n",
7405                 ibm->name, ret);
7406
7407         ibm_exit(ibm);
7408         return (ret < 0)? ret : 0;
7409 }
7410
7411 /* Probing */
7412
7413 static bool __pure __init tpacpi_is_fw_digit(const char c)
7414 {
7415         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7416 }
7417
7418 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7419 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7420                                                 const char t)
7421 {
7422         return s && strlen(s) >= 8 &&
7423                 tpacpi_is_fw_digit(s[0]) &&
7424                 tpacpi_is_fw_digit(s[1]) &&
7425                 s[2] == t && s[3] == 'T' &&
7426                 tpacpi_is_fw_digit(s[4]) &&
7427                 tpacpi_is_fw_digit(s[5]) &&
7428                 s[6] == 'W' && s[7] == 'W';
7429 }
7430
7431 /* returns 0 - probe ok, or < 0 - probe error.
7432  * Probe ok doesn't mean thinkpad found.
7433  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7434 static int __must_check __init get_thinkpad_model_data(
7435                                                 struct thinkpad_id_data *tp)
7436 {
7437         const struct dmi_device *dev = NULL;
7438         char ec_fw_string[18];
7439         char const *s;
7440
7441         if (!tp)
7442                 return -EINVAL;
7443
7444         memset(tp, 0, sizeof(*tp));
7445
7446         if (dmi_name_in_vendors("IBM"))
7447                 tp->vendor = PCI_VENDOR_ID_IBM;
7448         else if (dmi_name_in_vendors("LENOVO"))
7449                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7450         else
7451                 return 0;
7452
7453         s = dmi_get_system_info(DMI_BIOS_VERSION);
7454         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7455         if (s && !tp->bios_version_str)
7456                 return -ENOMEM;
7457
7458         /* Really ancient ThinkPad 240X will fail this, which is fine */
7459         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7460                 return 0;
7461
7462         tp->bios_model = tp->bios_version_str[0]
7463                          | (tp->bios_version_str[1] << 8);
7464         tp->bios_release = (tp->bios_version_str[4] << 8)
7465                          | tp->bios_version_str[5];
7466
7467         /*
7468          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7469          * X32 or newer, all Z series;  Some models must have an
7470          * up-to-date BIOS or they will not be detected.
7471          *
7472          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7473          */
7474         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7475                 if (sscanf(dev->name,
7476                            "IBM ThinkPad Embedded Controller -[%17c",
7477                            ec_fw_string) == 1) {
7478                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7479                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7480
7481                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7482                         if (!tp->ec_version_str)
7483                                 return -ENOMEM;
7484
7485                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7486                                 tp->ec_model = ec_fw_string[0]
7487                                                 | (ec_fw_string[1] << 8);
7488                                 tp->ec_release = (ec_fw_string[4] << 8)
7489                                                 | ec_fw_string[5];
7490                         } else {
7491                                 printk(TPACPI_NOTICE
7492                                         "ThinkPad firmware release %s "
7493                                         "doesn't match the known patterns\n",
7494                                         ec_fw_string);
7495                                 printk(TPACPI_NOTICE
7496                                         "please report this to %s\n",
7497                                         TPACPI_MAIL);
7498                         }
7499                         break;
7500                 }
7501         }
7502
7503         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7504         if (s && !strnicmp(s, "ThinkPad", 8)) {
7505                 tp->model_str = kstrdup(s, GFP_KERNEL);
7506                 if (!tp->model_str)
7507                         return -ENOMEM;
7508         }
7509
7510         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7511         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7512         if (s && !tp->nummodel_str)
7513                 return -ENOMEM;
7514
7515         return 0;
7516 }
7517
7518 static int __init probe_for_thinkpad(void)
7519 {
7520         int is_thinkpad;
7521
7522         if (acpi_disabled)
7523                 return -ENODEV;
7524
7525         /*
7526          * Non-ancient models have better DMI tagging, but very old models
7527          * don't.
7528          */
7529         is_thinkpad = (thinkpad_id.model_str != NULL);
7530
7531         /* ec is required because many other handles are relative to it */
7532         TPACPI_ACPIHANDLE_INIT(ec);
7533         if (!ec_handle) {
7534                 if (is_thinkpad)
7535                         printk(TPACPI_ERR
7536                                 "Not yet supported ThinkPad detected!\n");
7537                 return -ENODEV;
7538         }
7539
7540         /*
7541          * Risks a regression on very old machines, but reduces potential
7542          * false positives a damn great deal
7543          */
7544         if (!is_thinkpad)
7545                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7546
7547         if (!is_thinkpad && !force_load)
7548                 return -ENODEV;
7549
7550         return 0;
7551 }
7552
7553
7554 /* Module init, exit, parameters */
7555
7556 static struct ibm_init_struct ibms_init[] __initdata = {
7557         {
7558                 .init = thinkpad_acpi_driver_init,
7559                 .data = &thinkpad_acpi_driver_data,
7560         },
7561         {
7562                 .init = hotkey_init,
7563                 .data = &hotkey_driver_data,
7564         },
7565         {
7566                 .init = bluetooth_init,
7567                 .data = &bluetooth_driver_data,
7568         },
7569         {
7570                 .init = wan_init,
7571                 .data = &wan_driver_data,
7572         },
7573         {
7574                 .init = uwb_init,
7575                 .data = &uwb_driver_data,
7576         },
7577 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7578         {
7579                 .init = video_init,
7580                 .data = &video_driver_data,
7581         },
7582 #endif
7583         {
7584                 .init = light_init,
7585                 .data = &light_driver_data,
7586         },
7587         {
7588                 .init = cmos_init,
7589                 .data = &cmos_driver_data,
7590         },
7591         {
7592                 .init = led_init,
7593                 .data = &led_driver_data,
7594         },
7595         {
7596                 .init = beep_init,
7597                 .data = &beep_driver_data,
7598         },
7599         {
7600                 .init = thermal_init,
7601                 .data = &thermal_driver_data,
7602         },
7603         {
7604                 .data = &ecdump_driver_data,
7605         },
7606         {
7607                 .init = brightness_init,
7608                 .data = &brightness_driver_data,
7609         },
7610         {
7611                 .data = &volume_driver_data,
7612         },
7613         {
7614                 .init = fan_init,
7615                 .data = &fan_driver_data,
7616         },
7617 };
7618
7619 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7620 {
7621         unsigned int i;
7622         struct ibm_struct *ibm;
7623
7624         if (!kp || !kp->name || !val)
7625                 return -EINVAL;
7626
7627         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7628                 ibm = ibms_init[i].data;
7629                 WARN_ON(ibm == NULL);
7630
7631                 if (!ibm || !ibm->name)
7632                         continue;
7633
7634                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7635                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7636                                 return -ENOSPC;
7637                         strcpy(ibms_init[i].param, val);
7638                         strcat(ibms_init[i].param, ",");
7639                         return 0;
7640                 }
7641         }
7642
7643         return -EINVAL;
7644 }
7645
7646 module_param(experimental, int, 0);
7647 MODULE_PARM_DESC(experimental,
7648                  "Enables experimental features when non-zero");
7649
7650 module_param_named(debug, dbg_level, uint, 0);
7651 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7652
7653 module_param(force_load, bool, 0);
7654 MODULE_PARM_DESC(force_load,
7655                  "Attempts to load the driver even on a "
7656                  "mis-identified ThinkPad when true");
7657
7658 module_param_named(fan_control, fan_control_allowed, bool, 0);
7659 MODULE_PARM_DESC(fan_control,
7660                  "Enables setting fan parameters features when true");
7661
7662 module_param_named(brightness_mode, brightness_mode, uint, 0);
7663 MODULE_PARM_DESC(brightness_mode,
7664                  "Selects brightness control strategy: "
7665                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7666
7667 module_param(brightness_enable, uint, 0);
7668 MODULE_PARM_DESC(brightness_enable,
7669                  "Enables backlight control when 1, disables when 0");
7670
7671 module_param(hotkey_report_mode, uint, 0);
7672 MODULE_PARM_DESC(hotkey_report_mode,
7673                  "used for backwards compatibility with userspace, "
7674                  "see documentation");
7675
7676 #define TPACPI_PARAM(feature) \
7677         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7678         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7679                          "at module load, see documentation")
7680
7681 TPACPI_PARAM(hotkey);
7682 TPACPI_PARAM(bluetooth);
7683 TPACPI_PARAM(video);
7684 TPACPI_PARAM(light);
7685 TPACPI_PARAM(cmos);
7686 TPACPI_PARAM(led);
7687 TPACPI_PARAM(beep);
7688 TPACPI_PARAM(ecdump);
7689 TPACPI_PARAM(brightness);
7690 TPACPI_PARAM(volume);
7691 TPACPI_PARAM(fan);
7692
7693 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7694 module_param(dbg_wlswemul, uint, 0);
7695 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7696 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7697 MODULE_PARM_DESC(wlsw_state,
7698                  "Initial state of the emulated WLSW switch");
7699
7700 module_param(dbg_bluetoothemul, uint, 0);
7701 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7702 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7703 MODULE_PARM_DESC(bluetooth_state,
7704                  "Initial state of the emulated bluetooth switch");
7705
7706 module_param(dbg_wwanemul, uint, 0);
7707 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7708 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7709 MODULE_PARM_DESC(wwan_state,
7710                  "Initial state of the emulated WWAN switch");
7711
7712 module_param(dbg_uwbemul, uint, 0);
7713 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7714 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7715 MODULE_PARM_DESC(uwb_state,
7716                  "Initial state of the emulated UWB switch");
7717 #endif
7718
7719 static void thinkpad_acpi_module_exit(void)
7720 {
7721         struct ibm_struct *ibm, *itmp;
7722
7723         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7724
7725         list_for_each_entry_safe_reverse(ibm, itmp,
7726                                          &tpacpi_all_drivers,
7727                                          all_drivers) {
7728                 ibm_exit(ibm);
7729         }
7730
7731         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7732
7733         if (tpacpi_inputdev) {
7734                 if (tp_features.input_device_registered)
7735                         input_unregister_device(tpacpi_inputdev);
7736                 else
7737                         input_free_device(tpacpi_inputdev);
7738         }
7739
7740         if (tpacpi_hwmon)
7741                 hwmon_device_unregister(tpacpi_hwmon);
7742
7743         if (tp_features.sensors_pdev_attrs_registered)
7744                 device_remove_file(&tpacpi_sensors_pdev->dev,
7745                                    &dev_attr_thinkpad_acpi_pdev_name);
7746         if (tpacpi_sensors_pdev)
7747                 platform_device_unregister(tpacpi_sensors_pdev);
7748         if (tpacpi_pdev)
7749                 platform_device_unregister(tpacpi_pdev);
7750
7751         if (tp_features.sensors_pdrv_attrs_registered)
7752                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7753         if (tp_features.platform_drv_attrs_registered)
7754                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7755
7756         if (tp_features.sensors_pdrv_registered)
7757                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7758
7759         if (tp_features.platform_drv_registered)
7760                 platform_driver_unregister(&tpacpi_pdriver);
7761
7762         if (proc_dir)
7763                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7764
7765         if (tpacpi_wq)
7766                 destroy_workqueue(tpacpi_wq);
7767
7768         kfree(thinkpad_id.bios_version_str);
7769         kfree(thinkpad_id.ec_version_str);
7770         kfree(thinkpad_id.model_str);
7771 }
7772
7773
7774 static int __init thinkpad_acpi_module_init(void)
7775 {
7776         int ret, i;
7777
7778         tpacpi_lifecycle = TPACPI_LIFE_INIT;
7779
7780         /* Parameter checking */
7781         if (hotkey_report_mode > 2)
7782                 return -EINVAL;
7783
7784         /* Driver-level probe */
7785
7786         ret = get_thinkpad_model_data(&thinkpad_id);
7787         if (ret) {
7788                 printk(TPACPI_ERR
7789                         "unable to get DMI data: %d\n", ret);
7790                 thinkpad_acpi_module_exit();
7791                 return ret;
7792         }
7793         ret = probe_for_thinkpad();
7794         if (ret) {
7795                 thinkpad_acpi_module_exit();
7796                 return ret;
7797         }
7798
7799         /* Driver initialization */
7800
7801         TPACPI_ACPIHANDLE_INIT(ecrd);
7802         TPACPI_ACPIHANDLE_INIT(ecwr);
7803
7804         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7805         if (!tpacpi_wq) {
7806                 thinkpad_acpi_module_exit();
7807                 return -ENOMEM;
7808         }
7809
7810         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7811         if (!proc_dir) {
7812                 printk(TPACPI_ERR
7813                        "unable to create proc dir " TPACPI_PROC_DIR);
7814                 thinkpad_acpi_module_exit();
7815                 return -ENODEV;
7816         }
7817
7818         ret = platform_driver_register(&tpacpi_pdriver);
7819         if (ret) {
7820                 printk(TPACPI_ERR
7821                        "unable to register main platform driver\n");
7822                 thinkpad_acpi_module_exit();
7823                 return ret;
7824         }
7825         tp_features.platform_drv_registered = 1;
7826
7827         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7828         if (ret) {
7829                 printk(TPACPI_ERR
7830                        "unable to register hwmon platform driver\n");
7831                 thinkpad_acpi_module_exit();
7832                 return ret;
7833         }
7834         tp_features.sensors_pdrv_registered = 1;
7835
7836         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7837         if (!ret) {
7838                 tp_features.platform_drv_attrs_registered = 1;
7839                 ret = tpacpi_create_driver_attributes(
7840                                         &tpacpi_hwmon_pdriver.driver);
7841         }
7842         if (ret) {
7843                 printk(TPACPI_ERR
7844                        "unable to create sysfs driver attributes\n");
7845                 thinkpad_acpi_module_exit();
7846                 return ret;
7847         }
7848         tp_features.sensors_pdrv_attrs_registered = 1;
7849
7850
7851         /* Device initialization */
7852         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7853                                                         NULL, 0);
7854         if (IS_ERR(tpacpi_pdev)) {
7855                 ret = PTR_ERR(tpacpi_pdev);
7856                 tpacpi_pdev = NULL;
7857                 printk(TPACPI_ERR "unable to register platform device\n");
7858                 thinkpad_acpi_module_exit();
7859                 return ret;
7860         }
7861         tpacpi_sensors_pdev = platform_device_register_simple(
7862                                                 TPACPI_HWMON_DRVR_NAME,
7863                                                 -1, NULL, 0);
7864         if (IS_ERR(tpacpi_sensors_pdev)) {
7865                 ret = PTR_ERR(tpacpi_sensors_pdev);
7866                 tpacpi_sensors_pdev = NULL;
7867                 printk(TPACPI_ERR
7868                        "unable to register hwmon platform device\n");
7869                 thinkpad_acpi_module_exit();
7870                 return ret;
7871         }
7872         ret = device_create_file(&tpacpi_sensors_pdev->dev,
7873                                  &dev_attr_thinkpad_acpi_pdev_name);
7874         if (ret) {
7875                 printk(TPACPI_ERR
7876                        "unable to create sysfs hwmon device attributes\n");
7877                 thinkpad_acpi_module_exit();
7878                 return ret;
7879         }
7880         tp_features.sensors_pdev_attrs_registered = 1;
7881         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7882         if (IS_ERR(tpacpi_hwmon)) {
7883                 ret = PTR_ERR(tpacpi_hwmon);
7884                 tpacpi_hwmon = NULL;
7885                 printk(TPACPI_ERR "unable to register hwmon device\n");
7886                 thinkpad_acpi_module_exit();
7887                 return ret;
7888         }
7889         mutex_init(&tpacpi_inputdev_send_mutex);
7890         tpacpi_inputdev = input_allocate_device();
7891         if (!tpacpi_inputdev) {
7892                 printk(TPACPI_ERR "unable to allocate input device\n");
7893                 thinkpad_acpi_module_exit();
7894                 return -ENOMEM;
7895         } else {
7896                 /* Prepare input device, but don't register */
7897                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7898                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7899                 tpacpi_inputdev->id.bustype = BUS_HOST;
7900                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7901                                                 thinkpad_id.vendor :
7902                                                 PCI_VENDOR_ID_IBM;
7903                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7904                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7905         }
7906         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7907                 ret = ibm_init(&ibms_init[i]);
7908                 if (ret >= 0 && *ibms_init[i].param)
7909                         ret = ibms_init[i].data->write(ibms_init[i].param);
7910                 if (ret < 0) {
7911                         thinkpad_acpi_module_exit();
7912                         return ret;
7913                 }
7914         }
7915         ret = input_register_device(tpacpi_inputdev);
7916         if (ret < 0) {
7917                 printk(TPACPI_ERR "unable to register input device\n");
7918                 thinkpad_acpi_module_exit();
7919                 return ret;
7920         } else {
7921                 tp_features.input_device_registered = 1;
7922         }
7923
7924         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7925         return 0;
7926 }
7927
7928 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7929
7930 /*
7931  * This will autoload the driver in almost every ThinkPad
7932  * in widespread use.
7933  *
7934  * Only _VERY_ old models, like the 240, 240x and 570 lack
7935  * the HKEY event interface.
7936  */
7937 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
7938
7939 /*
7940  * DMI matching for module autoloading
7941  *
7942  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7943  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7944  *
7945  * Only models listed in thinkwiki will be supported, so add yours
7946  * if it is not there yet.
7947  */
7948 #define IBM_BIOS_MODULE_ALIAS(__type) \
7949         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7950
7951 /* Ancient thinkpad BIOSes have to be identified by
7952  * BIOS type or model number, and there are far less
7953  * BIOS types than model numbers... */
7954 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
7955
7956 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
7957 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
7958 MODULE_DESCRIPTION(TPACPI_DESC);
7959 MODULE_VERSION(TPACPI_VERSION);
7960 MODULE_LICENSE("GPL");
7961
7962 module_init(thinkpad_acpi_module_init);
7963 module_exit(thinkpad_acpi_module_exit);