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