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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 0x020300
  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 /* rfkill switches */
 170 enum {
 171         TPACPI_RFK_BLUETOOTH_SW_ID = 0,
 172         TPACPI_RFK_WWAN_SW_ID,
 173         TPACPI_RFK_UWB_SW_ID,
 174 };
 175
 176 /* printk headers */
 177 #define TPACPI_LOG TPACPI_FILE ": "
 178 #define TPACPI_EMERG    KERN_EMERG      TPACPI_LOG
 179 #define TPACPI_ALERT    KERN_ALERT      TPACPI_LOG
 180 #define TPACPI_CRIT     KERN_CRIT       TPACPI_LOG
 181 #define TPACPI_ERR      KERN_ERR        TPACPI_LOG
 182 #define TPACPI_WARN     KERN_WARNING    TPACPI_LOG
 183 #define TPACPI_NOTICE   KERN_NOTICE     TPACPI_LOG
 184 #define TPACPI_INFO     KERN_INFO       TPACPI_LOG
 185 #define TPACPI_DEBUG    KERN_DEBUG      TPACPI_LOG
 186
 187 /* Debugging printk groups */
 188 #define TPACPI_DBG_ALL          0xffff
 189 #define TPACPI_DBG_DISCLOSETASK 0x8000
 190 #define TPACPI_DBG_INIT         0x0001
 191 #define TPACPI_DBG_EXIT         0x0002
 192 #define TPACPI_DBG_RFKILL       0x0004
 193 #define TPACPI_DBG_HKEY         0x0008
 194 #define TPACPI_DBG_FAN          0x0010
 195 #define TPACPI_DBG_BRGHT        0x0020
 196
 197 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 198 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 199 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 200
 201
 202 /****************************************************************************
 203  * Driver-wide structs and misc. variables
 204  */
 205
 206 struct ibm_struct;
 207
 208 struct tp_acpi_drv_struct {
 209         const struct acpi_device_id *hid;
 210         struct acpi_driver *driver;
 211
 212         void (*notify) (struct ibm_struct *, u32);
 213         acpi_handle *handle;
 214         u32 type;
 215         struct acpi_device *device;
 216 };
 217
 218 struct ibm_struct {
 219         char *name;
 220
 221         int (*read) (char *);
 222         int (*write) (char *);
 223         void (*exit) (void);
 224         void (*resume) (void);
 225         void (*suspend) (pm_message_t state);
 226         void (*shutdown) (void);
 227
 228         struct list_head all_drivers;
 229
 230         struct tp_acpi_drv_struct *acpi;
 231
 232         struct {
 233                 u8 acpi_driver_registered:1;
 234                 u8 acpi_notify_installed:1;
 235                 u8 proc_created:1;
 236                 u8 init_called:1;
 237                 u8 experimental:1;
 238         } flags;
 239 };
 240
 241 struct ibm_init_struct {
 242         char param[32];
 243
 244         int (*init) (struct ibm_init_struct *);
 245         struct ibm_struct *data;
 246 };
 247
 248 static struct {
 249 #ifdef CONFIG_THINKPAD_ACPI_BAY
 250         u32 bay_status:1;
 251         u32 bay_eject:1;
 252         u32 bay_status2:1;
 253         u32 bay_eject2:1;
 254 #endif
 255         u32 bluetooth:1;
 256         u32 hotkey:1;
 257         u32 hotkey_mask:1;
 258         u32 hotkey_wlsw:1;
 259         u32 hotkey_tablet:1;
 260         u32 light:1;
 261         u32 light_status:1;
 262         u32 bright_16levels:1;
 263         u32 bright_acpimode:1;
 264         u32 wan:1;
 265         u32 uwb:1;
 266         u32 fan_ctrl_status_undef:1;
 267         u32 beep_needs_two_args:1;
 268         u32 input_device_registered:1;
 269         u32 platform_drv_registered:1;
 270         u32 platform_drv_attrs_registered:1;
 271         u32 sensors_pdrv_registered:1;
 272         u32 sensors_pdrv_attrs_registered:1;
 273         u32 sensors_pdev_attrs_registered:1;
 274         u32 hotkey_poll_active:1;
 275 } tp_features;
 276
 277 static struct {
 278         u16 hotkey_mask_ff:1;
 279 } tp_warned;
 280
 281 struct thinkpad_id_data {
 282         unsigned int vendor;    /* ThinkPad vendor:
 283                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 284
 285         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 286         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 287
 288         u16 bios_model;         /* 1Y = 0x5931, 0 = unknown */
 289         u16 ec_model;
 290         u16 bios_release;       /* 1ZETK1WW = 0x314b, 0 = unknown */
 291         u16 ec_release;
 292
 293         char *model_str;        /* ThinkPad T43 */
 294         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 295 };
 296 static struct thinkpad_id_data thinkpad_id;
 297
 298 static enum {
 299         TPACPI_LIFE_INIT = 0,
 300         TPACPI_LIFE_RUNNING,
 301         TPACPI_LIFE_EXITING,
 302 } tpacpi_lifecycle;
 303
 304 static int experimental;
 305 static u32 dbg_level;
 306
 307 static struct workqueue_struct *tpacpi_wq;
 308
 309 enum led_status_t {
 310         TPACPI_LED_OFF = 0,
 311         TPACPI_LED_ON,
 312         TPACPI_LED_BLINK,
 313 };
 314
 315 /* Special LED class that can defer work */
 316 struct tpacpi_led_classdev {
 317         struct led_classdev led_classdev;
 318         struct work_struct work;
 319         enum led_status_t new_state;
 320         unsigned int led;
 321 };
 322
 323 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 324 static int dbg_wlswemul;
 325 static int tpacpi_wlsw_emulstate;
 326 static int dbg_bluetoothemul;
 327 static int tpacpi_bluetooth_emulstate;
 328 static int dbg_wwanemul;
 329 static int tpacpi_wwan_emulstate;
 330 static int dbg_uwbemul;
 331 static int tpacpi_uwb_emulstate;
 332 #endif
 333
 334
 335 /*************************************************************************
 336  *  Debugging helpers
 337  */
 338
 339 #define dbg_printk(a_dbg_level, format, arg...) \
 340         do { if (dbg_level & (a_dbg_level)) \
 341                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 342         } while (0)
 343
 344 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 345 #define vdbg_printk dbg_printk
 346 static const char *str_supported(int is_supported);
 347 #else
 348 #define vdbg_printk(a_dbg_level, format, arg...) \
 349         do { } while (0)
 350 #endif
 351
 352 static void tpacpi_log_usertask(const char * const what)
 353 {
 354         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 355                 what, task_tgid_vnr(current));
 356 }
 357
 358 #define tpacpi_disclose_usertask(what, format, arg...) \
 359         do { \
 360                 if (unlikely( \
 361                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 362                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 363                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 364                                 what, task_tgid_vnr(current), ## arg); \
 365                 } \
 366         } while (0)
 367
 368 /*
 369  * Quirk handling helpers
 370  *
 371  * ThinkPad IDs and versions seen in the field so far
 372  * are two-characters from the set [0-9A-Z], i.e. base 36.
 373  *
 374  * We use values well outside that range as specials.
 375  */
 376
 377 #define TPACPI_MATCH_ANY                0xffffU
 378 #define TPACPI_MATCH_UNKNOWN            0U
 379
 380 /* TPID('1', 'Y') == 0x5931 */
 381 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1))
 382
 383 #define TPACPI_Q_IBM(__id1, __id2, __quirk)     \
 384         { .vendor = PCI_VENDOR_ID_IBM,          \
 385           .bios = TPID(__id1, __id2),           \
 386           .ec = TPACPI_MATCH_ANY,               \
 387           .quirks = (__quirk) }
 388
 389 #define TPACPI_Q_LNV(__id1, __id2, __quirk)     \
 390         { .vendor = PCI_VENDOR_ID_LENOVO,       \
 391           .bios = TPID(__id1, __id2),           \
 392           .ec = TPACPI_MATCH_ANY,               \
 393           .quirks = (__quirk) }
 394
 395 struct tpacpi_quirk {
 396         unsigned int vendor;
 397         u16 bios;
 398         u16 ec;
 399         unsigned long quirks;
 400 };
 401
 402 /**
 403  * tpacpi_check_quirks() - search BIOS/EC version on a list
 404  * @qlist:              array of &struct tpacpi_quirk
 405  * @qlist_size:         number of elements in @qlist
 406  *
 407  * Iterates over a quirks list until one is found that matches the
 408  * ThinkPad's vendor, BIOS and EC model.
 409  *
 410  * Returns 0 if nothing matches, otherwise returns the quirks field of
 411  * the matching &struct tpacpi_quirk entry.
 412  *
 413  * The match criteria is: vendor, ec and bios much match.
 414  */
 415 static unsigned long __init tpacpi_check_quirks(
 416                         const struct tpacpi_quirk *qlist,
 417                         unsigned int qlist_size)
 418 {
 419         while (qlist_size) {
 420                 if ((qlist->vendor == thinkpad_id.vendor ||
 421                                 qlist->vendor == TPACPI_MATCH_ANY) &&
 422                     (qlist->bios == thinkpad_id.bios_model ||
 423                                 qlist->bios == TPACPI_MATCH_ANY) &&
 424                     (qlist->ec == thinkpad_id.ec_model ||
 425                                 qlist->ec == TPACPI_MATCH_ANY))
 426                         return qlist->quirks;
 427
 428                 qlist_size--;
 429                 qlist++;
 430         }
 431         return 0;
 432 }
 433
 434
 435 /****************************************************************************
 436  ****************************************************************************
 437  *
 438  * ACPI Helpers and device model
 439  *
 440  ****************************************************************************
 441  ****************************************************************************/
 442
 443 /*************************************************************************
 444  * ACPI basic handles
 445  */
 446
 447 static acpi_handle root_handle;
 448
 449 #define TPACPI_HANDLE(object, parent, paths...)                 \
 450         static acpi_handle  object##_handle;                    \
 451         static acpi_handle *object##_parent = &parent##_handle; \
 452         static char        *object##_path;                      \
 453         static char        *object##_paths[] = { paths }
 454
 455 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 456            "\\_SB.PCI.ISA.EC",  /* 570 */
 457            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 458            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 459            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 460            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 461            "\\_SB.PCI0.LPC.EC", /* all others */
 462            );
 463
 464 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 465 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 466
 467 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 468                                         /* T4x, X31, X40 */
 469            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 470            "\\CMS",             /* R40, R40e */
 471            );                   /* all others */
 472
 473 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 474            "^HKEY",             /* R30, R31 */
 475            "HKEY",              /* all others */
 476            );                   /* 570 */
 477
 478 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 479            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 480            "\\_SB.PCI0.VID0",   /* 770e */
 481            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 482            "\\_SB.PCI0.AGP.VID",        /* all others */
 483            );                           /* R30, R31 */
 484
 485
 486 /*************************************************************************
 487  * ACPI helpers
 488  */
 489
 490 static int acpi_evalf(acpi_handle handle,
 491                       void *res, char *method, char *fmt, ...)
 492 {
 493         char *fmt0 = fmt;
 494         struct acpi_object_list params;
 495         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 496         struct acpi_buffer result, *resultp;
 497         union acpi_object out_obj;
 498         acpi_status status;
 499         va_list ap;
 500         char res_type;
 501         int success;
 502         int quiet;
 503
 504         if (!*fmt) {
 505                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 506                 return 0;
 507         }
 508
 509         if (*fmt == 'q') {
 510                 quiet = 1;
 511                 fmt++;
 512         } else
 513                 quiet = 0;
 514
 515         res_type = *(fmt++);
 516
 517         params.count = 0;
 518         params.pointer = &in_objs[0];
 519
 520         va_start(ap, fmt);
 521         while (*fmt) {
 522                 char c = *(fmt++);
 523                 switch (c) {
 524                 case 'd':       /* int */
 525                         in_objs[params.count].integer.value = va_arg(ap, int);
 526                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 527                         break;
 528                         /* add more types as needed */
 529                 default:
 530                         printk(TPACPI_ERR "acpi_evalf() called "
 531                                "with invalid format character '%c'\n", c);
 532                         return 0;
 533                 }
 534         }
 535         va_end(ap);
 536
 537         if (res_type != 'v') {
 538                 result.length = sizeof(out_obj);
 539                 result.pointer = &out_obj;
 540                 resultp = &result;
 541         } else
 542                 resultp = NULL;
 543
 544         status = acpi_evaluate_object(handle, method, &params, resultp);
 545
 546         switch (res_type) {
 547         case 'd':               /* int */
 548                 if (res)
 549                         *(int *)res = out_obj.integer.value;
 550                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 551                 break;
 552         case 'v':               /* void */
 553                 success = status == AE_OK;
 554                 break;
 555                 /* add more types as needed */
 556         default:
 557                 printk(TPACPI_ERR "acpi_evalf() called "
 558                        "with invalid format character '%c'\n", res_type);
 559                 return 0;
 560         }
 561
 562         if (!success && !quiet)
 563                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 564                        method, fmt0, status);
 565
 566         return success;
 567 }
 568
 569 static int acpi_ec_read(int i, u8 *p)
 570 {
 571         int v;
 572
 573         if (ecrd_handle) {
 574                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 575                         return 0;
 576                 *p = v;
 577         } else {
 578                 if (ec_read(i, p) < 0)
 579                         return 0;
 580         }
 581
 582         return 1;
 583 }
 584
 585 static int acpi_ec_write(int i, u8 v)
 586 {
 587         if (ecwr_handle) {
 588                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 589                         return 0;
 590         } else {
 591                 if (ec_write(i, v) < 0)
 592                         return 0;
 593         }
 594
 595         return 1;
 596 }
 597
 598 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 599 static int _sta(acpi_handle handle)
 600 {
 601         int status;
 602
 603         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 604                 status = 0;
 605
 606         return status;
 607 }
 608 #endif
 609
 610 static int issue_thinkpad_cmos_command(int cmos_cmd)
 611 {
 612         if (!cmos_handle)
 613                 return -ENXIO;
 614
 615         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 616                 return -EIO;
 617
 618         return 0;
 619 }
 620
 621 /*************************************************************************
 622  * ACPI device model
 623  */
 624
 625 #define TPACPI_ACPIHANDLE_INIT(object) \
 626         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 627                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 628
 629 static void drv_acpi_handle_init(char *name,
 630                            acpi_handle *handle, acpi_handle parent,
 631                            char **paths, int num_paths, char **path)
 632 {
 633         int i;
 634         acpi_status status;
 635
 636         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 637                 name);
 638
 639         for (i = 0; i < num_paths; i++) {
 640                 status = acpi_get_handle(parent, paths[i], handle);
 641                 if (ACPI_SUCCESS(status)) {
 642                         *path = paths[i];
 643                         dbg_printk(TPACPI_DBG_INIT,
 644                                    "Found ACPI handle %s for %s\n",
 645                                    *path, name);
 646                         return;
 647                 }
 648         }
 649
 650         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 651                     name);
 652         *handle = NULL;
 653 }
 654
 655 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 656 {
 657         struct ibm_struct *ibm = data;
 658
 659         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 660                 return;
 661
 662         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 663                 return;
 664
 665         ibm->acpi->notify(ibm, event);
 666 }
 667
 668 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 669 {
 670         acpi_status status;
 671         int rc;
 672
 673         BUG_ON(!ibm->acpi);
 674
 675         if (!*ibm->acpi->handle)
 676                 return 0;
 677
 678         vdbg_printk(TPACPI_DBG_INIT,
 679                 "setting up ACPI notify for %s\n", ibm->name);
 680
 681         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 682         if (rc < 0) {
 683                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 684                         ibm->name, rc);
 685                 return -ENODEV;
 686         }
 687
 688         ibm->acpi->device->driver_data = ibm;
 689         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 690                 TPACPI_ACPI_EVENT_PREFIX,
 691                 ibm->name);
 692
 693         status = acpi_install_notify_handler(*ibm->acpi->handle,
 694                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 695         if (ACPI_FAILURE(status)) {
 696                 if (status == AE_ALREADY_EXISTS) {
 697                         printk(TPACPI_NOTICE
 698                                "another device driver is already "
 699                                "handling %s events\n", ibm->name);
 700                 } else {
 701                         printk(TPACPI_ERR
 702                                "acpi_install_notify_handler(%s) failed: %d\n",
 703                                ibm->name, status);
 704                 }
 705                 return -ENODEV;
 706         }
 707         ibm->flags.acpi_notify_installed = 1;
 708         return 0;
 709 }
 710
 711 static int __init tpacpi_device_add(struct acpi_device *device)
 712 {
 713         return 0;
 714 }
 715
 716 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 717 {
 718         int rc;
 719
 720         dbg_printk(TPACPI_DBG_INIT,
 721                 "registering %s as an ACPI driver\n", ibm->name);
 722
 723         BUG_ON(!ibm->acpi);
 724
 725         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 726         if (!ibm->acpi->driver) {
 727                 printk(TPACPI_ERR
 728                        "failed to allocate memory for ibm->acpi->driver\n");
 729                 return -ENOMEM;
 730         }
 731
 732         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 733         ibm->acpi->driver->ids = ibm->acpi->hid;
 734
 735         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 736
 737         rc = acpi_bus_register_driver(ibm->acpi->driver);
 738         if (rc < 0) {
 739                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 740                        ibm->name, rc);
 741                 kfree(ibm->acpi->driver);
 742                 ibm->acpi->driver = NULL;
 743         } else if (!rc)
 744                 ibm->flags.acpi_driver_registered = 1;
 745
 746         return rc;
 747 }
 748
 749
 750 /****************************************************************************
 751  ****************************************************************************
 752  *
 753  * Procfs Helpers
 754  *
 755  ****************************************************************************
 756  ****************************************************************************/
 757
 758 static int dispatch_procfs_read(char *page, char **start, off_t off,
 759                         int count, int *eof, void *data)
 760 {
 761         struct ibm_struct *ibm = data;
 762         int len;
 763
 764         if (!ibm || !ibm->read)
 765                 return -EINVAL;
 766
 767         len = ibm->read(page);
 768         if (len < 0)
 769                 return len;
 770
 771         if (len <= off + count)
 772                 *eof = 1;
 773         *start = page + off;
 774         len -= off;
 775         if (len > count)
 776                 len = count;
 777         if (len < 0)
 778                 len = 0;
 779
 780         return len;
 781 }
 782
 783 static int dispatch_procfs_write(struct file *file,
 784                         const char __user *userbuf,
 785                         unsigned long count, void *data)
 786 {
 787         struct ibm_struct *ibm = data;
 788         char *kernbuf;
 789         int ret;
 790
 791         if (!ibm || !ibm->write)
 792                 return -EINVAL;
 793
 794         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 795         if (!kernbuf)
 796                 return -ENOMEM;
 797
 798         if (copy_from_user(kernbuf, userbuf, count)) {
 799                 kfree(kernbuf);
 800                 return -EFAULT;
 801         }
 802
 803         kernbuf[count] = 0;
 804         strcat(kernbuf, ",");
 805         ret = ibm->write(kernbuf);
 806         if (ret == 0)
 807                 ret = count;
 808
 809         kfree(kernbuf);
 810
 811         return ret;
 812 }
 813
 814 static char *next_cmd(char **cmds)
 815 {
 816         char *start = *cmds;
 817         char *end;
 818
 819         while ((end = strchr(start, ',')) && end == start)
 820                 start = end + 1;
 821
 822         if (!end)
 823                 return NULL;
 824
 825         *end = 0;
 826         *cmds = end + 1;
 827         return start;
 828 }
 829
 830
 831 /****************************************************************************
 832  ****************************************************************************
 833  *
 834  * Device model: input, hwmon and platform
 835  *
 836  ****************************************************************************
 837  ****************************************************************************/
 838
 839 static struct platform_device *tpacpi_pdev;
 840 static struct platform_device *tpacpi_sensors_pdev;
 841 static struct device *tpacpi_hwmon;
 842 static struct input_dev *tpacpi_inputdev;
 843 static struct mutex tpacpi_inputdev_send_mutex;
 844 static LIST_HEAD(tpacpi_all_drivers);
 845
 846 static int tpacpi_suspend_handler(struct platform_device *pdev,
 847                                   pm_message_t state)
 848 {
 849         struct ibm_struct *ibm, *itmp;
 850
 851         list_for_each_entry_safe(ibm, itmp,
 852                                  &tpacpi_all_drivers,
 853                                  all_drivers) {
 854                 if (ibm->suspend)
 855                         (ibm->suspend)(state);
 856         }
 857
 858         return 0;
 859 }
 860
 861 static int tpacpi_resume_handler(struct platform_device *pdev)
 862 {
 863         struct ibm_struct *ibm, *itmp;
 864
 865         list_for_each_entry_safe(ibm, itmp,
 866                                  &tpacpi_all_drivers,
 867                                  all_drivers) {
 868                 if (ibm->resume)
 869                         (ibm->resume)();
 870         }
 871
 872         return 0;
 873 }
 874
 875 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 876 {
 877         struct ibm_struct *ibm, *itmp;
 878
 879         list_for_each_entry_safe(ibm, itmp,
 880                                  &tpacpi_all_drivers,
 881                                  all_drivers) {
 882                 if (ibm->shutdown)
 883                         (ibm->shutdown)();
 884         }
 885 }
 886
 887 static struct platform_driver tpacpi_pdriver = {
 888         .driver = {
 889                 .name = TPACPI_DRVR_NAME,
 890                 .owner = THIS_MODULE,
 891         },
 892         .suspend = tpacpi_suspend_handler,
 893         .resume = tpacpi_resume_handler,
 894         .shutdown = tpacpi_shutdown_handler,
 895 };
 896
 897 static struct platform_driver tpacpi_hwmon_pdriver = {
 898         .driver = {
 899                 .name = TPACPI_HWMON_DRVR_NAME,
 900                 .owner = THIS_MODULE,
 901         },
 902 };
 903
 904 /*************************************************************************
 905  * sysfs support helpers
 906  */
 907
 908 struct attribute_set {
 909         unsigned int members, max_members;
 910         struct attribute_group group;
 911 };
 912
 913 struct attribute_set_obj {
 914         struct attribute_set s;
 915         struct attribute *a;
 916 } __attribute__((packed));
 917
 918 static struct attribute_set *create_attr_set(unsigned int max_members,
 919                                                 const char *name)
 920 {
 921         struct attribute_set_obj *sobj;
 922
 923         if (max_members == 0)
 924                 return NULL;
 925
 926         /* Allocates space for implicit NULL at the end too */
 927         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 928                     max_members * sizeof(struct attribute *),
 929                     GFP_KERNEL);
 930         if (!sobj)
 931                 return NULL;
 932         sobj->s.max_members = max_members;
 933         sobj->s.group.attrs = &sobj->a;
 934         sobj->s.group.name = name;
 935
 936         return &sobj->s;
 937 }
 938
 939 #define destroy_attr_set(_set) \
 940         kfree(_set);
 941
 942 /* not multi-threaded safe, use it in a single thread per set */
 943 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 944 {
 945         if (!s || !attr)
 946                 return -EINVAL;
 947
 948         if (s->members >= s->max_members)
 949                 return -ENOMEM;
 950
 951         s->group.attrs[s->members] = attr;
 952         s->members++;
 953
 954         return 0;
 955 }
 956
 957 static int add_many_to_attr_set(struct attribute_set *s,
 958                         struct attribute **attr,
 959                         unsigned int count)
 960 {
 961         int i, res;
 962
 963         for (i = 0; i < count; i++) {
 964                 res = add_to_attr_set(s, attr[i]);
 965                 if (res)
 966                         return res;
 967         }
 968
 969         return 0;
 970 }
 971
 972 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 973 {
 974         sysfs_remove_group(kobj, &s->group);
 975         destroy_attr_set(s);
 976 }
 977
 978 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 979         sysfs_create_group(_kobj, &_attr_set->group)
 980
 981 static int parse_strtoul(const char *buf,
 982                 unsigned long max, unsigned long *value)
 983 {
 984         char *endp;
 985
 986         while (*buf && isspace(*buf))
 987                 buf++;
 988         *value = simple_strtoul(buf, &endp, 0);
 989         while (*endp && isspace(*endp))
 990                 endp++;
 991         if (*endp || *value > max)
 992                 return -EINVAL;
 993
 994         return 0;
 995 }
 996
 997 static void tpacpi_disable_brightness_delay(void)
 998 {
 999         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
1000                 printk(TPACPI_NOTICE
1001                         "ACPI backlight control delay disabled\n");
1002 }
1003
1004 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
1005 {
1006         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1007         union acpi_object *obj;
1008         int rc;
1009
1010         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
1011                 obj = (union acpi_object *)buffer.pointer;
1012                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
1013                         printk(TPACPI_ERR "Unknown _BCL data, "
1014                                "please report this to %s\n", TPACPI_MAIL);
1015                         rc = 0;
1016                 } else {
1017                         rc = obj->package.count;
1018                 }
1019         } else {
1020                 return 0;
1021         }
1022
1023         kfree(buffer.pointer);
1024         return rc;
1025 }
1026
1027 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
1028                                         u32 lvl, void *context, void **rv)
1029 {
1030         char name[ACPI_PATH_SEGMENT_LENGTH];
1031         struct acpi_buffer buffer = { sizeof(name), &name };
1032
1033         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
1034             !strncmp("_BCL", name, sizeof(name) - 1)) {
1035                 BUG_ON(!rv || !*rv);
1036                 **(int **)rv = tpacpi_query_bcl_levels(handle);
1037                 return AE_CTRL_TERMINATE;
1038         } else {
1039                 return AE_OK;
1040         }
1041 }
1042
1043 /*
1044  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
1045  */
1046 static int __init tpacpi_check_std_acpi_brightness_support(void)
1047 {
1048         int status;
1049         int bcl_levels = 0;
1050         void *bcl_ptr = &bcl_levels;
1051
1052         if (!vid_handle) {
1053                 TPACPI_ACPIHANDLE_INIT(vid);
1054         }
1055         if (!vid_handle)
1056                 return 0;
1057
1058         /*
1059          * Search for a _BCL method, and execute it.  This is safe on all
1060          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
1061          * BIOS in ACPI backlight control mode.  We do NOT have to care
1062          * about calling the _BCL method in an enabled video device, any
1063          * will do for our purposes.
1064          */
1065
1066         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
1067                                      tpacpi_acpi_walk_find_bcl, NULL,
1068                                      &bcl_ptr);
1069
1070         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
1071                 tp_features.bright_acpimode = 1;
1072                 return (bcl_levels - 2);
1073         }
1074
1075         return 0;
1076 }
1077
1078 static int __init tpacpi_new_rfkill(const unsigned int id,
1079                         struct rfkill **rfk,
1080                         const enum rfkill_type rfktype,
1081                         const char *name,
1082                         const bool set_default,
1083                         int (*toggle_radio)(void *, enum rfkill_state),
1084                         int (*get_state)(void *, enum rfkill_state *))
1085 {
1086         int res;
1087         enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1088
1089         res = get_state(NULL, &initial_state);
1090         if (res < 0) {
1091                 printk(TPACPI_ERR
1092                         "failed to read initial state for %s, error %d; "
1093                         "will turn radio off\n", name, res);
1094         } else if (set_default) {
1095                 /* try to set the initial state as the default for the rfkill
1096                  * type, since we ask the firmware to preserve it across S5 in
1097                  * NVRAM */
1098                 if (rfkill_set_default(rfktype,
1099                                 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1100                                         RFKILL_STATE_UNBLOCKED :
1101                                         RFKILL_STATE_SOFT_BLOCKED) == -EPERM)
1102                         vdbg_printk(TPACPI_DBG_RFKILL,
1103                                     "Default state for %s cannot be changed\n",
1104                                     name);
1105         }
1106
1107         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1108         if (!*rfk) {
1109                 printk(TPACPI_ERR
1110                         "failed to allocate memory for rfkill class\n");
1111                 return -ENOMEM;
1112         }
1113
1114         (*rfk)->name = name;
1115         (*rfk)->get_state = get_state;
1116         (*rfk)->toggle_radio = toggle_radio;
1117         (*rfk)->state = initial_state;
1118
1119         res = rfkill_register(*rfk);
1120         if (res < 0) {
1121                 printk(TPACPI_ERR
1122                         "failed to register %s rfkill switch: %d\n",
1123                         name, res);
1124                 rfkill_free(*rfk);
1125                 *rfk = NULL;
1126                 return res;
1127         }
1128
1129         return 0;
1130 }
1131
1132 static void printk_deprecated_attribute(const char * const what,
1133                                         const char * const details)
1134 {
1135         tpacpi_log_usertask("deprecated sysfs attribute");
1136         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1137                 "will be removed. %s\n",
1138                 what, details);
1139 }
1140
1141 static void printk_deprecated_rfkill_attribute(const char * const what)
1142 {
1143         printk_deprecated_attribute(what,
1144                         "Please switch to generic rfkill before year 2010");
1145 }
1146
1147 /*************************************************************************
1148  * thinkpad-acpi driver attributes
1149  */
1150
1151 /* interface_version --------------------------------------------------- */
1152 static ssize_t tpacpi_driver_interface_version_show(
1153                                 struct device_driver *drv,
1154                                 char *buf)
1155 {
1156         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1157 }
1158
1159 static DRIVER_ATTR(interface_version, S_IRUGO,
1160                 tpacpi_driver_interface_version_show, NULL);
1161
1162 /* debug_level --------------------------------------------------------- */
1163 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1164                                                 char *buf)
1165 {
1166         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1167 }
1168
1169 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1170                                                 const char *buf, size_t count)
1171 {
1172         unsigned long t;
1173
1174         if (parse_strtoul(buf, 0xffff, &t))
1175                 return -EINVAL;
1176
1177         dbg_level = t;
1178
1179         return count;
1180 }
1181
1182 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1183                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1184
1185 /* version ------------------------------------------------------------- */
1186 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1187                                                 char *buf)
1188 {
1189         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1190                         TPACPI_DESC, TPACPI_VERSION);
1191 }
1192
1193 static DRIVER_ATTR(version, S_IRUGO,
1194                 tpacpi_driver_version_show, NULL);
1195
1196 /* --------------------------------------------------------------------- */
1197
1198 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1199
1200 static void tpacpi_send_radiosw_update(void);
1201
1202 /* wlsw_emulstate ------------------------------------------------------ */
1203 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1204                                                 char *buf)
1205 {
1206         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1207 }
1208
1209 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1210                                                 const char *buf, size_t count)
1211 {
1212         unsigned long t;
1213
1214         if (parse_strtoul(buf, 1, &t))
1215                 return -EINVAL;
1216
1217         if (tpacpi_wlsw_emulstate != t) {
1218                 tpacpi_wlsw_emulstate = !!t;
1219                 tpacpi_send_radiosw_update();
1220         } else
1221                 tpacpi_wlsw_emulstate = !!t;
1222
1223         return count;
1224 }
1225
1226 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1227                 tpacpi_driver_wlsw_emulstate_show,
1228                 tpacpi_driver_wlsw_emulstate_store);
1229
1230 /* bluetooth_emulstate ------------------------------------------------- */
1231 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1232                                         struct device_driver *drv,
1233                                         char *buf)
1234 {
1235         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1236 }
1237
1238 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1239                                         struct device_driver *drv,
1240                                         const char *buf, size_t count)
1241 {
1242         unsigned long t;
1243
1244         if (parse_strtoul(buf, 1, &t))
1245                 return -EINVAL;
1246
1247         tpacpi_bluetooth_emulstate = !!t;
1248
1249         return count;
1250 }
1251
1252 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1253                 tpacpi_driver_bluetooth_emulstate_show,
1254                 tpacpi_driver_bluetooth_emulstate_store);
1255
1256 /* wwan_emulstate ------------------------------------------------- */
1257 static ssize_t tpacpi_driver_wwan_emulstate_show(
1258                                         struct device_driver *drv,
1259                                         char *buf)
1260 {
1261         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1262 }
1263
1264 static ssize_t tpacpi_driver_wwan_emulstate_store(
1265                                         struct device_driver *drv,
1266                                         const char *buf, size_t count)
1267 {
1268         unsigned long t;
1269
1270         if (parse_strtoul(buf, 1, &t))
1271                 return -EINVAL;
1272
1273         tpacpi_wwan_emulstate = !!t;
1274
1275         return count;
1276 }
1277
1278 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1279                 tpacpi_driver_wwan_emulstate_show,
1280                 tpacpi_driver_wwan_emulstate_store);
1281
1282 /* uwb_emulstate ------------------------------------------------- */
1283 static ssize_t tpacpi_driver_uwb_emulstate_show(
1284                                         struct device_driver *drv,
1285                                         char *buf)
1286 {
1287         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1288 }
1289
1290 static ssize_t tpacpi_driver_uwb_emulstate_store(
1291                                         struct device_driver *drv,
1292                                         const char *buf, size_t count)
1293 {
1294         unsigned long t;
1295
1296         if (parse_strtoul(buf, 1, &t))
1297                 return -EINVAL;
1298
1299         tpacpi_uwb_emulstate = !!t;
1300
1301         return count;
1302 }
1303
1304 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1305                 tpacpi_driver_uwb_emulstate_show,
1306                 tpacpi_driver_uwb_emulstate_store);
1307 #endif
1308
1309 /* --------------------------------------------------------------------- */
1310
1311 static struct driver_attribute *tpacpi_driver_attributes[] = {
1312         &driver_attr_debug_level, &driver_attr_version,
1313         &driver_attr_interface_version,
1314 };
1315
1316 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1317 {
1318         int i, res;
1319
1320         i = 0;
1321         res = 0;
1322         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1323                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1324                 i++;
1325         }
1326
1327 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1328         if (!res && dbg_wlswemul)
1329                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1330         if (!res && dbg_bluetoothemul)
1331                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1332         if (!res && dbg_wwanemul)
1333                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1334         if (!res && dbg_uwbemul)
1335                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1336 #endif
1337
1338         return res;
1339 }
1340
1341 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1342 {
1343         int i;
1344
1345         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1346                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1347
1348 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1349         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1350         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1351         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1352         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1353 #endif
1354 }
1355
1356 /****************************************************************************
1357  ****************************************************************************
1358  *
1359  * Subdrivers
1360  *
1361  ****************************************************************************
1362  ****************************************************************************/
1363
1364 /*************************************************************************
1365  * thinkpad-acpi init subdriver
1366  */
1367
1368 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1369 {
1370         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1371         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1372
1373         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1374                 (thinkpad_id.bios_version_str) ?
1375                         thinkpad_id.bios_version_str : "unknown",
1376                 (thinkpad_id.ec_version_str) ?
1377                         thinkpad_id.ec_version_str : "unknown");
1378
1379         if (thinkpad_id.vendor && thinkpad_id.model_str)
1380                 printk(TPACPI_INFO "%s %s, model %s\n",
1381                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1382                                 "IBM" : ((thinkpad_id.vendor ==
1383                                                 PCI_VENDOR_ID_LENOVO) ?
1384                                         "Lenovo" : "Unknown vendor"),
1385                         thinkpad_id.model_str,
1386                         (thinkpad_id.nummodel_str) ?
1387                                 thinkpad_id.nummodel_str : "unknown");
1388
1389         return 0;
1390 }
1391
1392 static int thinkpad_acpi_driver_read(char *p)
1393 {
1394         int len = 0;
1395
1396         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1397         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1398
1399         return len;
1400 }
1401
1402 static struct ibm_struct thinkpad_acpi_driver_data = {
1403         .name = "driver",
1404         .read = thinkpad_acpi_driver_read,
1405 };
1406
1407 /*************************************************************************
1408  * Hotkey subdriver
1409  */
1410
1411 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1412         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1413         TP_ACPI_HOTKEYSCAN_FNF2,
1414         TP_ACPI_HOTKEYSCAN_FNF3,
1415         TP_ACPI_HOTKEYSCAN_FNF4,
1416         TP_ACPI_HOTKEYSCAN_FNF5,
1417         TP_ACPI_HOTKEYSCAN_FNF6,
1418         TP_ACPI_HOTKEYSCAN_FNF7,
1419         TP_ACPI_HOTKEYSCAN_FNF8,
1420         TP_ACPI_HOTKEYSCAN_FNF9,
1421         TP_ACPI_HOTKEYSCAN_FNF10,
1422         TP_ACPI_HOTKEYSCAN_FNF11,
1423         TP_ACPI_HOTKEYSCAN_FNF12,
1424         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1425         TP_ACPI_HOTKEYSCAN_FNINSERT,
1426         TP_ACPI_HOTKEYSCAN_FNDELETE,
1427         TP_ACPI_HOTKEYSCAN_FNHOME,
1428         TP_ACPI_HOTKEYSCAN_FNEND,
1429         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1430         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1431         TP_ACPI_HOTKEYSCAN_FNSPACE,
1432         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1433         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1434         TP_ACPI_HOTKEYSCAN_MUTE,
1435         TP_ACPI_HOTKEYSCAN_THINKPAD,
1436 };
1437
1438 enum {  /* Keys available through NVRAM polling */
1439         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1440         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1441 };
1442
1443 enum {  /* Positions of some of the keys in hotkey masks */
1444         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1445         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1446         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1447         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1448         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1449         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1450         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1451         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1452         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1453         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1454         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1455 };
1456
1457 enum {  /* NVRAM to ACPI HKEY group map */
1458         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1459                                           TP_ACPI_HKEY_ZOOM_MASK |
1460                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1461                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1462         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1463                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1464         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1465                                           TP_ACPI_HKEY_VOLDWN_MASK |
1466                                           TP_ACPI_HKEY_MUTE_MASK,
1467 };
1468
1469 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1470 struct tp_nvram_state {
1471        u16 thinkpad_toggle:1;
1472        u16 zoom_toggle:1;
1473        u16 display_toggle:1;
1474        u16 thinklight_toggle:1;
1475        u16 hibernate_toggle:1;
1476        u16 displayexp_toggle:1;
1477        u16 display_state:1;
1478        u16 brightness_toggle:1;
1479        u16 volume_toggle:1;
1480        u16 mute:1;
1481
1482        u8 brightness_level;
1483        u8 volume_level;
1484 };
1485
1486 static struct task_struct *tpacpi_hotkey_task;
1487 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1488 static int hotkey_poll_freq = 10;       /* Hz */
1489 static struct mutex hotkey_thread_mutex;
1490 static struct mutex hotkey_thread_data_mutex;
1491 static unsigned int hotkey_config_change;
1492
1493 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1494
1495 #define hotkey_source_mask 0U
1496
1497 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1498
1499 static struct mutex hotkey_mutex;
1500
1501 static enum {   /* Reasons for waking up */
1502         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1503         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1504         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1505 } hotkey_wakeup_reason;
1506
1507 static int hotkey_autosleep_ack;
1508
1509 static u32 hotkey_orig_mask;
1510 static u32 hotkey_all_mask;
1511 static u32 hotkey_reserved_mask;
1512 static u32 hotkey_mask;
1513
1514 static unsigned int hotkey_report_mode;
1515
1516 static u16 *hotkey_keycode_map;
1517
1518 static struct attribute_set *hotkey_dev_attributes;
1519
1520 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1521 #define HOTKEY_CONFIG_CRITICAL_START \
1522         do { \
1523                 mutex_lock(&hotkey_thread_data_mutex); \
1524                 hotkey_config_change++; \
1525         } while (0);
1526 #define HOTKEY_CONFIG_CRITICAL_END \
1527         mutex_unlock(&hotkey_thread_data_mutex);
1528 #else
1529 #define HOTKEY_CONFIG_CRITICAL_START
1530 #define HOTKEY_CONFIG_CRITICAL_END
1531 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1532
1533 /* HKEY.MHKG() return bits */
1534 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1535
1536 static int hotkey_get_wlsw(int *status)
1537 {
1538 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1539         if (dbg_wlswemul) {
1540                 *status = !!tpacpi_wlsw_emulstate;
1541                 return 0;
1542         }
1543 #endif
1544         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1545                 return -EIO;
1546         return 0;
1547 }
1548
1549 static int hotkey_get_tablet_mode(int *status)
1550 {
1551         int s;
1552
1553         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1554                 return -EIO;
1555
1556         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1557         return 0;
1558 }
1559
1560 /*
1561  * Call with hotkey_mutex held
1562  */
1563 static int hotkey_mask_get(void)
1564 {
1565         u32 m = 0;
1566
1567         if (tp_features.hotkey_mask) {
1568                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1569                         return -EIO;
1570         }
1571         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1572
1573         return 0;
1574 }
1575
1576 /*
1577  * Call with hotkey_mutex held
1578  */
1579 static int hotkey_mask_set(u32 mask)
1580 {
1581         int i;
1582         int rc = 0;
1583
1584         if (tp_features.hotkey_mask) {
1585                 if (!tp_warned.hotkey_mask_ff &&
1586                     (mask == 0xffff || mask == 0xffffff ||
1587                      mask == 0xffffffff)) {
1588                         tp_warned.hotkey_mask_ff = 1;
1589                         printk(TPACPI_NOTICE
1590                                "setting the hotkey mask to 0x%08x is likely "
1591                                "not the best way to go about it\n", mask);
1592                         printk(TPACPI_NOTICE
1593                                "please consider using the driver defaults, "
1594                                "and refer to up-to-date thinkpad-acpi "
1595                                "documentation\n");
1596                 }
1597
1598                 HOTKEY_CONFIG_CRITICAL_START
1599                 for (i = 0; i < 32; i++) {
1600                         u32 m = 1 << i;
1601                         /* enable in firmware mask only keys not in NVRAM
1602                          * mode, but enable the key in the cached hotkey_mask
1603                          * regardless of mode, or the key will end up
1604                          * disabled by hotkey_mask_get() */
1605                         if (!acpi_evalf(hkey_handle,
1606                                         NULL, "MHKM", "vdd", i + 1,
1607                                         !!((mask & ~hotkey_source_mask) & m))) {
1608                                 rc = -EIO;
1609                                 break;
1610                         } else {
1611                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1612                         }
1613                 }
1614                 HOTKEY_CONFIG_CRITICAL_END
1615
1616                 /* hotkey_mask_get must be called unconditionally below */
1617                 if (!hotkey_mask_get() && !rc &&
1618                     (hotkey_mask & ~hotkey_source_mask) !=
1619                      (mask & ~hotkey_source_mask)) {
1620                         printk(TPACPI_NOTICE
1621                                "requested hot key mask 0x%08x, but "
1622                                "firmware forced it to 0x%08x\n",
1623                                mask, hotkey_mask);
1624                 }
1625         } else {
1626 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1627                 HOTKEY_CONFIG_CRITICAL_START
1628                 hotkey_mask = mask & hotkey_source_mask;
1629                 HOTKEY_CONFIG_CRITICAL_END
1630                 hotkey_mask_get();
1631                 if (hotkey_mask != mask) {
1632                         printk(TPACPI_NOTICE
1633                                "requested hot key mask 0x%08x, "
1634                                "forced to 0x%08x (NVRAM poll mask is "
1635                                "0x%08x): no firmware mask support\n",
1636                                mask, hotkey_mask, hotkey_source_mask);
1637                 }
1638 #else
1639                 hotkey_mask_get();
1640                 rc = -ENXIO;
1641 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1642         }
1643
1644         return rc;
1645 }
1646
1647 static int hotkey_status_get(int *status)
1648 {
1649         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1650                 return -EIO;
1651
1652         return 0;
1653 }
1654
1655 static int hotkey_status_set(bool enable)
1656 {
1657         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1658                 return -EIO;
1659
1660         return 0;
1661 }
1662
1663 static void tpacpi_input_send_tabletsw(void)
1664 {
1665         int state;
1666
1667         if (tp_features.hotkey_tablet &&
1668             !hotkey_get_tablet_mode(&state)) {
1669                 mutex_lock(&tpacpi_inputdev_send_mutex);
1670
1671                 input_report_switch(tpacpi_inputdev,
1672                                     SW_TABLET_MODE, !!state);
1673                 input_sync(tpacpi_inputdev);
1674
1675                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1676         }
1677 }
1678
1679 static void tpacpi_input_send_key(unsigned int scancode)
1680 {
1681         unsigned int keycode;
1682
1683         keycode = hotkey_keycode_map[scancode];
1684
1685         if (keycode != KEY_RESERVED) {
1686                 mutex_lock(&tpacpi_inputdev_send_mutex);
1687
1688                 input_report_key(tpacpi_inputdev, keycode, 1);
1689                 if (keycode == KEY_UNKNOWN)
1690                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1691                                     scancode);
1692                 input_sync(tpacpi_inputdev);
1693
1694                 input_report_key(tpacpi_inputdev, keycode, 0);
1695                 if (keycode == KEY_UNKNOWN)
1696                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1697                                     scancode);
1698                 input_sync(tpacpi_inputdev);
1699
1700                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1701         }
1702 }
1703
1704 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1705 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1706
1707 static void tpacpi_hotkey_send_key(unsigned int scancode)
1708 {
1709         tpacpi_input_send_key(scancode);
1710         if (hotkey_report_mode < 2) {
1711                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1712                                                 0x80, 0x1001 + scancode);
1713         }
1714 }
1715
1716 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1717 {
1718         u8 d;
1719
1720         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1721                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1722                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1723                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1724                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1725                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1726         }
1727         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1728                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1729                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1730         }
1731         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1732                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1733                 n->displayexp_toggle =
1734                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1735         }
1736         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1737                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1738                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1739                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1740                 n->brightness_toggle =
1741                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1742         }
1743         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1744                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1745                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1746                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1747                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1748                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1749         }
1750 }
1751
1752 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1753         do { \
1754                 if ((mask & (1 << __scancode)) && \
1755                     oldn->__member != newn->__member) \
1756                 tpacpi_hotkey_send_key(__scancode); \
1757         } while (0)
1758
1759 #define TPACPI_MAY_SEND_KEY(__scancode) \
1760         do { if (mask & (1 << __scancode)) \
1761                 tpacpi_hotkey_send_key(__scancode); } while (0)
1762
1763 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1764                                            struct tp_nvram_state *newn,
1765                                            u32 mask)
1766 {
1767         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1768         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1769         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1770         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1771
1772         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1773
1774         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1775
1776         /* handle volume */
1777         if (oldn->volume_toggle != newn->volume_toggle) {
1778                 if (oldn->mute != newn->mute) {
1779                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1780                 }
1781                 if (oldn->volume_level > newn->volume_level) {
1782                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1783                 } else if (oldn->volume_level < newn->volume_level) {
1784                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1785                 } else if (oldn->mute == newn->mute) {
1786                         /* repeated key presses that didn't change state */
1787                         if (newn->mute) {
1788                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1789                         } else if (newn->volume_level != 0) {
1790                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1791                         } else {
1792                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1793                         }
1794                 }
1795         }
1796
1797         /* handle brightness */
1798         if (oldn->brightness_toggle != newn->brightness_toggle) {
1799                 if (oldn->brightness_level < newn->brightness_level) {
1800                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1801                 } else if (oldn->brightness_level > newn->brightness_level) {
1802                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1803                 } else {
1804                         /* repeated key presses that didn't change state */
1805                         if (newn->brightness_level != 0) {
1806                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1807                         } else {
1808                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1809                         }
1810                 }
1811         }
1812 }
1813
1814 #undef TPACPI_COMPARE_KEY
1815 #undef TPACPI_MAY_SEND_KEY
1816
1817 static int hotkey_kthread(void *data)
1818 {
1819         struct tp_nvram_state s[2];
1820         u32 mask;
1821         unsigned int si, so;
1822         unsigned long t;
1823         unsigned int change_detector, must_reset;
1824
1825         mutex_lock(&hotkey_thread_mutex);
1826
1827         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1828                 goto exit;
1829
1830         set_freezable();
1831
1832         so = 0;
1833         si = 1;
1834         t = 0;
1835
1836         /* Initial state for compares */
1837         mutex_lock(&hotkey_thread_data_mutex);
1838         change_detector = hotkey_config_change;
1839         mask = hotkey_source_mask & hotkey_mask;
1840         mutex_unlock(&hotkey_thread_data_mutex);
1841         hotkey_read_nvram(&s[so], mask);
1842
1843         while (!kthread_should_stop() && hotkey_poll_freq) {
1844                 if (t == 0)
1845                         t = 1000/hotkey_poll_freq;
1846                 t = msleep_interruptible(t);
1847                 if (unlikely(kthread_should_stop()))
1848                         break;
1849                 must_reset = try_to_freeze();
1850                 if (t > 0 && !must_reset)
1851                         continue;
1852
1853                 mutex_lock(&hotkey_thread_data_mutex);
1854                 if (must_reset || hotkey_config_change != change_detector) {
1855                         /* forget old state on thaw or config change */
1856                         si = so;
1857                         t = 0;
1858                         change_detector = hotkey_config_change;
1859                 }
1860                 mask = hotkey_source_mask & hotkey_mask;
1861                 mutex_unlock(&hotkey_thread_data_mutex);
1862
1863                 if (likely(mask)) {
1864                         hotkey_read_nvram(&s[si], mask);
1865                         if (likely(si != so)) {
1866                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1867                                                                 mask);
1868                         }
1869                 }
1870
1871                 so = si;
1872                 si ^= 1;
1873         }
1874
1875 exit:
1876         mutex_unlock(&hotkey_thread_mutex);
1877         return 0;
1878 }
1879
1880 static void hotkey_poll_stop_sync(void)
1881 {
1882         if (tpacpi_hotkey_task) {
1883                 if (frozen(tpacpi_hotkey_task) ||
1884                     freezing(tpacpi_hotkey_task))
1885                         thaw_process(tpacpi_hotkey_task);
1886
1887                 kthread_stop(tpacpi_hotkey_task);
1888                 tpacpi_hotkey_task = NULL;
1889                 mutex_lock(&hotkey_thread_mutex);
1890                 /* at this point, the thread did exit */
1891                 mutex_unlock(&hotkey_thread_mutex);
1892         }
1893 }
1894
1895 /* call with hotkey_mutex held */
1896 static void hotkey_poll_setup(int may_warn)
1897 {
1898         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1899             hotkey_poll_freq > 0 &&
1900             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1901                 if (!tpacpi_hotkey_task) {
1902                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1903                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1904                         if (IS_ERR(tpacpi_hotkey_task)) {
1905                                 tpacpi_hotkey_task = NULL;
1906                                 printk(TPACPI_ERR
1907                                        "could not create kernel thread "
1908                                        "for hotkey polling\n");
1909                         }
1910                 }
1911         } else {
1912                 hotkey_poll_stop_sync();
1913                 if (may_warn &&
1914                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1915                         printk(TPACPI_NOTICE
1916                                 "hot keys 0x%08x require polling, "
1917                                 "which is currently disabled\n",
1918                                 hotkey_source_mask);
1919                 }
1920         }
1921 }
1922
1923 static void hotkey_poll_setup_safe(int may_warn)
1924 {
1925         mutex_lock(&hotkey_mutex);
1926         hotkey_poll_setup(may_warn);
1927         mutex_unlock(&hotkey_mutex);
1928 }
1929
1930 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1931
1932 static void hotkey_poll_setup_safe(int __unused)
1933 {
1934 }
1935
1936 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1937
1938 static int hotkey_inputdev_open(struct input_dev *dev)
1939 {
1940         switch (tpacpi_lifecycle) {
1941         case TPACPI_LIFE_INIT:
1942                 /*
1943                  * hotkey_init will call hotkey_poll_setup_safe
1944                  * at the appropriate moment
1945                  */
1946                 return 0;
1947         case TPACPI_LIFE_EXITING:
1948                 return -EBUSY;
1949         case TPACPI_LIFE_RUNNING:
1950                 hotkey_poll_setup_safe(0);
1951                 return 0;
1952         }
1953
1954         /* Should only happen if tpacpi_lifecycle is corrupt */
1955         BUG();
1956         return -EBUSY;
1957 }
1958
1959 static void hotkey_inputdev_close(struct input_dev *dev)
1960 {
1961         /* disable hotkey polling when possible */
1962         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1963                 hotkey_poll_setup_safe(0);
1964 }
1965
1966 /* sysfs hotkey enable ------------------------------------------------- */
1967 static ssize_t hotkey_enable_show(struct device *dev,
1968                            struct device_attribute *attr,
1969                            char *buf)
1970 {
1971         int res, status;
1972
1973         printk_deprecated_attribute("hotkey_enable",
1974                         "Hotkey reporting is always enabled");
1975
1976         res = hotkey_status_get(&status);
1977         if (res)
1978                 return res;
1979
1980         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1981 }
1982
1983 static ssize_t hotkey_enable_store(struct device *dev,
1984                             struct device_attribute *attr,
1985                             const char *buf, size_t count)
1986 {
1987         unsigned long t;
1988
1989         printk_deprecated_attribute("hotkey_enable",
1990                         "Hotkeys can be disabled through hotkey_mask");
1991
1992         if (parse_strtoul(buf, 1, &t))
1993                 return -EINVAL;
1994
1995         if (t == 0)
1996                 return -EPERM;
1997
1998         return count;
1999 }
2000
2001 static struct device_attribute dev_attr_hotkey_enable =
2002         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
2003                 hotkey_enable_show, hotkey_enable_store);
2004
2005 /* sysfs hotkey mask --------------------------------------------------- */
2006 static ssize_t hotkey_mask_show(struct device *dev,
2007                            struct device_attribute *attr,
2008                            char *buf)
2009 {
2010         int res;
2011
2012         if (mutex_lock_killable(&hotkey_mutex))
2013                 return -ERESTARTSYS;
2014         res = hotkey_mask_get();
2015         mutex_unlock(&hotkey_mutex);
2016
2017         return (res)?
2018                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
2019 }
2020
2021 static ssize_t hotkey_mask_store(struct device *dev,
2022                             struct device_attribute *attr,
2023                             const char *buf, size_t count)
2024 {
2025         unsigned long t;
2026         int res;
2027
2028         if (parse_strtoul(buf, 0xffffffffUL, &t))
2029                 return -EINVAL;
2030
2031         if (mutex_lock_killable(&hotkey_mutex))
2032                 return -ERESTARTSYS;
2033
2034         res = hotkey_mask_set(t);
2035
2036 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2037         hotkey_poll_setup(1);
2038 #endif
2039
2040         mutex_unlock(&hotkey_mutex);
2041
2042         tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t);
2043
2044         return (res) ? res : count;
2045 }
2046
2047 static struct device_attribute dev_attr_hotkey_mask =
2048         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
2049                 hotkey_mask_show, hotkey_mask_store);
2050
2051 /* sysfs hotkey bios_enabled ------------------------------------------- */
2052 static ssize_t hotkey_bios_enabled_show(struct device *dev,
2053                            struct device_attribute *attr,
2054                            char *buf)
2055 {
2056         return sprintf(buf, "0\n");
2057 }
2058
2059 static struct device_attribute dev_attr_hotkey_bios_enabled =
2060         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
2061
2062 /* sysfs hotkey bios_mask ---------------------------------------------- */
2063 static ssize_t hotkey_bios_mask_show(struct device *dev,
2064                            struct device_attribute *attr,
2065                            char *buf)
2066 {
2067         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
2068 }
2069
2070 static struct device_attribute dev_attr_hotkey_bios_mask =
2071         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
2072
2073 /* sysfs hotkey all_mask ----------------------------------------------- */
2074 static ssize_t hotkey_all_mask_show(struct device *dev,
2075                            struct device_attribute *attr,
2076                            char *buf)
2077 {
2078         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2079                                 hotkey_all_mask | hotkey_source_mask);
2080 }
2081
2082 static struct device_attribute dev_attr_hotkey_all_mask =
2083         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2084
2085 /* sysfs hotkey recommended_mask --------------------------------------- */
2086 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2087                                             struct device_attribute *attr,
2088                                             char *buf)
2089 {
2090         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2091                         (hotkey_all_mask | hotkey_source_mask)
2092                         & ~hotkey_reserved_mask);
2093 }
2094
2095 static struct device_attribute dev_attr_hotkey_recommended_mask =
2096         __ATTR(hotkey_recommended_mask, S_IRUGO,
2097                 hotkey_recommended_mask_show, NULL);
2098
2099 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2100
2101 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2102 static ssize_t hotkey_source_mask_show(struct device *dev,
2103                            struct device_attribute *attr,
2104                            char *buf)
2105 {
2106         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2107 }
2108
2109 static ssize_t hotkey_source_mask_store(struct device *dev,
2110                             struct device_attribute *attr,
2111                             const char *buf, size_t count)
2112 {
2113         unsigned long t;
2114
2115         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2116                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2117                 return -EINVAL;
2118
2119         if (mutex_lock_killable(&hotkey_mutex))
2120                 return -ERESTARTSYS;
2121
2122         HOTKEY_CONFIG_CRITICAL_START
2123         hotkey_source_mask = t;
2124         HOTKEY_CONFIG_CRITICAL_END
2125
2126         hotkey_poll_setup(1);
2127
2128         mutex_unlock(&hotkey_mutex);
2129
2130         tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t);
2131
2132         return count;
2133 }
2134
2135 static struct device_attribute dev_attr_hotkey_source_mask =
2136         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2137                 hotkey_source_mask_show, hotkey_source_mask_store);
2138
2139 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2140 static ssize_t hotkey_poll_freq_show(struct device *dev,
2141                            struct device_attribute *attr,
2142                            char *buf)
2143 {
2144         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2145 }
2146
2147 static ssize_t hotkey_poll_freq_store(struct device *dev,
2148                             struct device_attribute *attr,
2149                             const char *buf, size_t count)
2150 {
2151         unsigned long t;
2152
2153         if (parse_strtoul(buf, 25, &t))
2154                 return -EINVAL;
2155
2156         if (mutex_lock_killable(&hotkey_mutex))
2157                 return -ERESTARTSYS;
2158
2159         hotkey_poll_freq = t;
2160
2161         hotkey_poll_setup(1);
2162         mutex_unlock(&hotkey_mutex);
2163
2164         tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t);
2165
2166         return count;
2167 }
2168
2169 static struct device_attribute dev_attr_hotkey_poll_freq =
2170         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2171                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2172
2173 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2174
2175 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2176 static ssize_t hotkey_radio_sw_show(struct device *dev,
2177                            struct device_attribute *attr,
2178                            char *buf)
2179 {
2180         int res, s;
2181         res = hotkey_get_wlsw(&s);
2182         if (res < 0)
2183                 return res;
2184
2185         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2186 }
2187
2188 static struct device_attribute dev_attr_hotkey_radio_sw =
2189         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2190
2191 static void hotkey_radio_sw_notify_change(void)
2192 {
2193         if (tp_features.hotkey_wlsw)
2194                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2195                              "hotkey_radio_sw");
2196 }
2197
2198 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2199 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2200                            struct device_attribute *attr,
2201                            char *buf)
2202 {
2203         int res, s;
2204         res = hotkey_get_tablet_mode(&s);
2205         if (res < 0)
2206                 return res;
2207
2208         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2209 }
2210
2211 static struct device_attribute dev_attr_hotkey_tablet_mode =
2212         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2213
2214 static void hotkey_tablet_mode_notify_change(void)
2215 {
2216         if (tp_features.hotkey_tablet)
2217                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2218                              "hotkey_tablet_mode");
2219 }
2220
2221 /* sysfs hotkey report_mode -------------------------------------------- */
2222 static ssize_t hotkey_report_mode_show(struct device *dev,
2223                            struct device_attribute *attr,
2224                            char *buf)
2225 {
2226         return snprintf(buf, PAGE_SIZE, "%d\n",
2227                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2228 }
2229
2230 static struct device_attribute dev_attr_hotkey_report_mode =
2231         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2232
2233 /* sysfs wakeup reason (pollable) -------------------------------------- */
2234 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2235                            struct device_attribute *attr,
2236                            char *buf)
2237 {
2238         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2239 }
2240
2241 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2242         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2243
2244 static void hotkey_wakeup_reason_notify_change(void)
2245 {
2246         if (tp_features.hotkey_mask)
2247                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2248                              "wakeup_reason");
2249 }
2250
2251 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2252 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2253                            struct device_attribute *attr,
2254                            char *buf)
2255 {
2256         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2257 }
2258
2259 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2260         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2261                hotkey_wakeup_hotunplug_complete_show, NULL);
2262
2263 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2264 {
2265         if (tp_features.hotkey_mask)
2266                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2267                              "wakeup_hotunplug_complete");
2268 }
2269
2270 /* --------------------------------------------------------------------- */
2271
2272 static struct attribute *hotkey_attributes[] __initdata = {
2273         &dev_attr_hotkey_enable.attr,
2274         &dev_attr_hotkey_bios_enabled.attr,
2275         &dev_attr_hotkey_report_mode.attr,
2276 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2277         &dev_attr_hotkey_mask.attr,
2278         &dev_attr_hotkey_all_mask.attr,
2279         &dev_attr_hotkey_recommended_mask.attr,
2280         &dev_attr_hotkey_source_mask.attr,
2281         &dev_attr_hotkey_poll_freq.attr,
2282 #endif
2283 };
2284
2285 static struct attribute *hotkey_mask_attributes[] __initdata = {
2286         &dev_attr_hotkey_bios_mask.attr,
2287 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2288         &dev_attr_hotkey_mask.attr,
2289         &dev_attr_hotkey_all_mask.attr,
2290         &dev_attr_hotkey_recommended_mask.attr,
2291 #endif
2292         &dev_attr_hotkey_wakeup_reason.attr,
2293         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2294 };
2295
2296 static void bluetooth_update_rfk(void);
2297 static void wan_update_rfk(void);
2298 static void uwb_update_rfk(void);
2299 static void tpacpi_send_radiosw_update(void)
2300 {
2301         int wlsw;
2302
2303         /* Sync these BEFORE sending any rfkill events */
2304         if (tp_features.bluetooth)
2305                 bluetooth_update_rfk();
2306         if (tp_features.wan)
2307                 wan_update_rfk();
2308         if (tp_features.uwb)
2309                 uwb_update_rfk();
2310
2311         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2312                 mutex_lock(&tpacpi_inputdev_send_mutex);
2313
2314                 input_report_switch(tpacpi_inputdev,
2315                                     SW_RFKILL_ALL, !!wlsw);
2316                 input_sync(tpacpi_inputdev);
2317
2318                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2319         }
2320         hotkey_radio_sw_notify_change();
2321 }
2322
2323 static void hotkey_exit(void)
2324 {
2325 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2326         hotkey_poll_stop_sync();
2327 #endif
2328
2329         if (hotkey_dev_attributes)
2330                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2331
2332         kfree(hotkey_keycode_map);
2333
2334         if (tp_features.hotkey) {
2335                 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY,
2336                            "restoring original hot key mask\n");
2337                 /* no short-circuit boolean operator below! */
2338                 if ((hotkey_mask_set(hotkey_orig_mask) |
2339                      hotkey_status_set(false)) != 0)
2340                         printk(TPACPI_ERR
2341                                "failed to restore hot key mask "
2342                                "to BIOS defaults\n");
2343         }
2344 }
2345
2346 static int __init hotkey_init(struct ibm_init_struct *iibm)
2347 {
2348         /* Requirements for changing the default keymaps:
2349          *
2350          * 1. Many of the keys are mapped to KEY_RESERVED for very
2351          *    good reasons.  Do not change them unless you have deep
2352          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2353          *    the various ThinkPad models.  The driver behaves
2354          *    differently for KEY_RESERVED: such keys have their
2355          *    hot key mask *unset* in mask_recommended, and also
2356          *    in the initial hot key mask programmed into the
2357          *    firmware at driver load time, which means the firm-
2358          *    ware may react very differently if you change them to
2359          *    something else;
2360          *
2361          * 2. You must be subscribed to the linux-thinkpad and
2362          *    ibm-acpi-devel mailing lists, and you should read the
2363          *    list archives since 2007 if you want to change the
2364          *    keymaps.  This requirement exists so that you will
2365          *    know the past history of problems with the thinkpad-
2366          *    acpi driver keymaps, and also that you will be
2367          *    listening to any bug reports;
2368          *
2369          * 3. Do not send thinkpad-acpi specific patches directly to
2370          *    for merging, *ever*.  Send them to the linux-acpi
2371          *    mailinglist for comments.  Merging is to be done only
2372          *    through acpi-test and the ACPI maintainer.
2373          *
2374          * If the above is too much to ask, don't change the keymap.
2375          * Ask the thinkpad-acpi maintainer to do it, instead.
2376          */
2377         static u16 ibm_keycode_map[] __initdata = {
2378                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2379                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2380                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2381                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2382
2383                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2384                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2385                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2386                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2387
2388                 /* brightness: firmware always reacts to them, unless
2389                  * X.org did some tricks in the radeon BIOS scratch
2390                  * registers of *some* models */
2391                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2392                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2393
2394                 /* Thinklight: firmware always react to it */
2395                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2396
2397                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2398                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2399
2400                 /* Volume: firmware always react to it and reprograms
2401                  * the built-in *extra* mixer.  Never map it to control
2402                  * another mixer by default. */
2403                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2404                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2405                 KEY_RESERVED,   /* 0x16: MUTE */
2406
2407                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2408
2409                 /* (assignments unknown, please report if found) */
2410                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2411                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2412         };
2413         static u16 lenovo_keycode_map[] __initdata = {
2414                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2415                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2416                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2417                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2418
2419                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2420                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2421                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2422                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2423
2424                 /* These either have to go through ACPI video, or
2425                  * act like in the IBM ThinkPads, so don't ever
2426                  * enable them by default */
2427                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2428                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2429
2430                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2431
2432                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2433                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2434
2435                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2436                  * react to it and reprograms the built-in *extra* mixer.
2437                  * Never map it to control another mixer by default.
2438                  *
2439                  * T60?, T61, R60?, R61: firmware and EC tries to send
2440                  * these over the regular keyboard, so these are no-ops,
2441                  * but there are still weird bugs re. MUTE, so do not
2442                  * change unless you get test reports from all Lenovo
2443                  * models.  May cause the BIOS to interfere with the
2444                  * HDA mixer.
2445                  */
2446                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2447                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2448                 KEY_RESERVED,   /* 0x16: MUTE */
2449
2450                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2451
2452                 /* (assignments unknown, please report if found) */
2453                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2454                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2455         };
2456
2457 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2458 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2459 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2460
2461         int res, i;
2462         int status;
2463         int hkeyv;
2464
2465         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2466                         "initializing hotkey subdriver\n");
2467
2468         BUG_ON(!tpacpi_inputdev);
2469         BUG_ON(tpacpi_inputdev->open != NULL ||
2470                tpacpi_inputdev->close != NULL);
2471
2472         TPACPI_ACPIHANDLE_INIT(hkey);
2473         mutex_init(&hotkey_mutex);
2474
2475 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2476         mutex_init(&hotkey_thread_mutex);
2477         mutex_init(&hotkey_thread_data_mutex);
2478 #endif
2479
2480         /* hotkey not supported on 570 */
2481         tp_features.hotkey = hkey_handle != NULL;
2482
2483         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2484                 "hotkeys are %s\n",
2485                 str_supported(tp_features.hotkey));
2486
2487         if (!tp_features.hotkey)
2488                 return 1;
2489
2490         tpacpi_disable_brightness_delay();
2491
2492         hotkey_dev_attributes = create_attr_set(13, NULL);
2493         if (!hotkey_dev_attributes)
2494                 return -ENOMEM;
2495         res = add_many_to_attr_set(hotkey_dev_attributes,
2496                         hotkey_attributes,
2497                         ARRAY_SIZE(hotkey_attributes));
2498         if (res)
2499                 goto err_exit;
2500
2501         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2502            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2503            for HKEY interface version 0x100 */
2504         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2505                 if ((hkeyv >> 8) != 1) {
2506                         printk(TPACPI_ERR "unknown version of the "
2507                                "HKEY interface: 0x%x\n", hkeyv);
2508                         printk(TPACPI_ERR "please report this to %s\n",
2509                                TPACPI_MAIL);
2510                 } else {
2511                         /*
2512                          * MHKV 0x100 in A31, R40, R40e,
2513                          * T4x, X31, and later
2514                          */
2515                         tp_features.hotkey_mask = 1;
2516                         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2517                                 "firmware HKEY interface version: 0x%x\n",
2518                                 hkeyv);
2519                 }
2520         }
2521
2522         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2523                 "hotkey masks are %s\n",
2524                 str_supported(tp_features.hotkey_mask));
2525
2526         if (tp_features.hotkey_mask) {
2527                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2528                                 "MHKA", "qd")) {
2529                         printk(TPACPI_ERR
2530                                "missing MHKA handler, "
2531                                "please report this to %s\n",
2532                                TPACPI_MAIL);
2533                         /* FN+F12, FN+F4, FN+F3 */
2534                         hotkey_all_mask = 0x080cU;
2535                 }
2536         }
2537
2538         /* hotkey_source_mask *must* be zero for
2539          * the first hotkey_mask_get */
2540         if (tp_features.hotkey_mask) {
2541                 res = hotkey_mask_get();
2542                 if (res)
2543                         goto err_exit;
2544
2545                 hotkey_orig_mask = hotkey_mask;
2546                 res = add_many_to_attr_set(
2547                                 hotkey_dev_attributes,
2548                                 hotkey_mask_attributes,
2549                                 ARRAY_SIZE(hotkey_mask_attributes));
2550                 if (res)
2551                         goto err_exit;
2552         }
2553
2554 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2555         if (tp_features.hotkey_mask) {
2556                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2557                                         & ~hotkey_all_mask;
2558         } else {
2559                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2560         }
2561
2562         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2563                     "hotkey source mask 0x%08x, polling freq %d\n",
2564                     hotkey_source_mask, hotkey_poll_freq);
2565 #endif
2566
2567 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2568         if (dbg_wlswemul) {
2569                 tp_features.hotkey_wlsw = 1;
2570                 printk(TPACPI_INFO
2571                         "radio switch emulation enabled\n");
2572         } else
2573 #endif
2574         /* Not all thinkpads have a hardware radio switch */
2575         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2576                 tp_features.hotkey_wlsw = 1;
2577                 printk(TPACPI_INFO
2578                         "radio switch found; radios are %s\n",
2579                         enabled(status, 0));
2580         }
2581         if (tp_features.hotkey_wlsw)
2582                 res = add_to_attr_set(hotkey_dev_attributes,
2583                                 &dev_attr_hotkey_radio_sw.attr);
2584
2585         /* For X41t, X60t, X61t Tablets... */
2586         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2587                 tp_features.hotkey_tablet = 1;
2588                 printk(TPACPI_INFO
2589                         "possible tablet mode switch found; "
2590                         "ThinkPad in %s mode\n",
2591                         (status & TP_HOTKEY_TABLET_MASK)?
2592                                 "tablet" : "laptop");
2593                 res = add_to_attr_set(hotkey_dev_attributes,
2594                                 &dev_attr_hotkey_tablet_mode.attr);
2595         }
2596
2597         if (!res)
2598                 res = register_attr_set_with_sysfs(
2599                                 hotkey_dev_attributes,
2600                                 &tpacpi_pdev->dev.kobj);
2601         if (res)
2602                 goto err_exit;
2603
2604         /* Set up key map */
2605
2606         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2607                                         GFP_KERNEL);
2608         if (!hotkey_keycode_map) {
2609                 printk(TPACPI_ERR
2610                         "failed to allocate memory for key map\n");
2611                 res = -ENOMEM;
2612                 goto err_exit;
2613         }
2614
2615         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2616                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2617                            "using Lenovo default hot key map\n");
2618                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2619                         TPACPI_HOTKEY_MAP_SIZE);
2620         } else {
2621                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2622                            "using IBM default hot key map\n");
2623                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2624                         TPACPI_HOTKEY_MAP_SIZE);
2625         }
2626
2627         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2628         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2629         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2630         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2631         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2632         tpacpi_inputdev->keycode = hotkey_keycode_map;
2633         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2634                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2635                         set_bit(hotkey_keycode_map[i],
2636                                 tpacpi_inputdev->keybit);
2637                 } else {
2638                         if (i < sizeof(hotkey_reserved_mask)*8)
2639                                 hotkey_reserved_mask |= 1 << i;
2640                 }
2641         }
2642
2643         if (tp_features.hotkey_wlsw) {
2644                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2645                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2646         }
2647         if (tp_features.hotkey_tablet) {
2648                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2649                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2650         }
2651
2652         /* Do not issue duplicate brightness change events to
2653          * userspace */
2654         if (!tp_features.bright_acpimode)
2655                 /* update bright_acpimode... */
2656                 tpacpi_check_std_acpi_brightness_support();
2657
2658         if (tp_features.bright_acpimode) {
2659                 printk(TPACPI_INFO
2660                        "This ThinkPad has standard ACPI backlight "
2661                        "brightness control, supported by the ACPI "
2662                        "video driver\n");
2663                 printk(TPACPI_NOTICE
2664                        "Disabling thinkpad-acpi brightness events "
2665                        "by default...\n");
2666
2667                 /* The hotkey_reserved_mask change below is not
2668                  * necessary while the keys are at KEY_RESERVED in the
2669                  * default map, but better safe than sorry, leave it
2670                  * here as a marker of what we have to do, especially
2671                  * when we finally become able to set this at runtime
2672                  * on response to X.org requests */
2673                 hotkey_reserved_mask |=
2674                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2675                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2676         }
2677
2678         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2679                         "enabling firmware HKEY event interface...\n");
2680         res = hotkey_status_set(true);
2681         if (res) {
2682                 hotkey_exit();
2683                 return res;
2684         }
2685         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2686                                 & ~hotkey_reserved_mask)
2687                                 | hotkey_orig_mask);
2688         if (res < 0 && res != -ENXIO) {
2689                 hotkey_exit();
2690                 return res;
2691         }
2692
2693         dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY,
2694                         "legacy ibm/hotkey event reporting over procfs %s\n",
2695                         (hotkey_report_mode < 2) ?
2696                                 "enabled" : "disabled");
2697
2698         tpacpi_inputdev->open = &hotkey_inputdev_open;
2699         tpacpi_inputdev->close = &hotkey_inputdev_close;
2700
2701         hotkey_poll_setup_safe(1);
2702         tpacpi_send_radiosw_update();
2703         tpacpi_input_send_tabletsw();
2704
2705         return 0;
2706
2707 err_exit:
2708         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2709         hotkey_dev_attributes = NULL;
2710
2711         return (res < 0)? res : 1;
2712 }
2713
2714 static bool hotkey_notify_hotkey(const u32 hkey,
2715                                  bool *send_acpi_ev,
2716                                  bool *ignore_acpi_ev)
2717 {
2718         /* 0x1000-0x1FFF: key presses */
2719         unsigned int scancode = hkey & 0xfff;
2720         *send_acpi_ev = true;
2721         *ignore_acpi_ev = false;
2722
2723         if (scancode > 0 && scancode < 0x21) {
2724                 scancode--;
2725                 if (!(hotkey_source_mask & (1 << scancode))) {
2726                         tpacpi_input_send_key(scancode);
2727                         *send_acpi_ev = false;
2728                 } else {
2729                         *ignore_acpi_ev = true;
2730                 }
2731                 return true;
2732         }
2733         return false;
2734 }
2735
2736 static bool hotkey_notify_wakeup(const u32 hkey,
2737                                  bool *send_acpi_ev,
2738                                  bool *ignore_acpi_ev)
2739 {
2740         /* 0x2000-0x2FFF: Wakeup reason */
2741         *send_acpi_ev = true;
2742         *ignore_acpi_ev = false;
2743
2744         switch (hkey) {
2745         case 0x2304: /* suspend, undock */
2746         case 0x2404: /* hibernation, undock */
2747                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2748                 *ignore_acpi_ev = true;
2749                 break;
2750
2751         case 0x2305: /* suspend, bay eject */
2752         case 0x2405: /* hibernation, bay eject */
2753                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2754                 *ignore_acpi_ev = true;
2755                 break;
2756
2757         case 0x2313: /* Battery on critical low level (S3) */
2758         case 0x2413: /* Battery on critical low level (S4) */
2759                 printk(TPACPI_ALERT
2760                         "EMERGENCY WAKEUP: battery almost empty\n");
2761                 /* how to auto-heal: */
2762                 /* 2313: woke up from S3, go to S4/S5 */
2763                 /* 2413: woke up from S4, go to S5 */
2764                 break;
2765
2766         default:
2767                 return false;
2768         }
2769
2770         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2771                 printk(TPACPI_INFO
2772                        "woke up due to a hot-unplug "
2773                        "request...\n");
2774                 hotkey_wakeup_reason_notify_change();
2775         }
2776         return true;
2777 }
2778
2779 static bool hotkey_notify_usrevent(const u32 hkey,
2780                                  bool *send_acpi_ev,
2781                                  bool *ignore_acpi_ev)
2782 {
2783         /* 0x5000-0x5FFF: human interface helpers */
2784         *send_acpi_ev = true;
2785         *ignore_acpi_ev = false;
2786
2787         switch (hkey) {
2788         case 0x5010: /* Lenovo new BIOS: brightness changed */
2789         case 0x500b: /* X61t: tablet pen inserted into bay */
2790         case 0x500c: /* X61t: tablet pen removed from bay */
2791                 return true;
2792
2793         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2794         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2795                 tpacpi_input_send_tabletsw();
2796                 hotkey_tablet_mode_notify_change();
2797                 *send_acpi_ev = false;
2798                 return true;
2799
2800         case 0x5001:
2801         case 0x5002:
2802                 /* LID switch events.  Do not propagate */
2803                 *ignore_acpi_ev = true;
2804                 return true;
2805
2806         default:
2807                 return false;
2808         }
2809 }
2810
2811 static bool hotkey_notify_thermal(const u32 hkey,
2812                                  bool *send_acpi_ev,
2813                                  bool *ignore_acpi_ev)
2814 {
2815         /* 0x6000-0x6FFF: thermal alarms */
2816         *send_acpi_ev = true;
2817         *ignore_acpi_ev = false;
2818
2819         switch (hkey) {
2820         case 0x6011:
2821                 printk(TPACPI_CRIT
2822                         "THERMAL ALARM: battery is too hot!\n");
2823                 /* recommended action: warn user through gui */
2824                 return true;
2825         case 0x6012:
2826                 printk(TPACPI_ALERT
2827                         "THERMAL EMERGENCY: battery is extremely hot!\n");
2828                 /* recommended action: immediate sleep/hibernate */
2829                 return true;
2830         case 0x6021:
2831                 printk(TPACPI_CRIT
2832                         "THERMAL ALARM: "
2833                         "a sensor reports something is too hot!\n");
2834                 /* recommended action: warn user through gui, that */
2835                 /* some internal component is too hot */
2836                 return true;
2837         case 0x6022:
2838                 printk(TPACPI_ALERT
2839                         "THERMAL EMERGENCY: "
2840                         "a sensor reports something is extremely hot!\n");
2841                 /* recommended action: immediate sleep/hibernate */
2842                 return true;
2843         case 0x6030:
2844                 printk(TPACPI_INFO
2845                         "EC reports that Thermal Table has changed\n");
2846                 /* recommended action: do nothing, we don't have
2847                  * Lenovo ATM information */
2848                 return true;
2849         default:
2850                 printk(TPACPI_ALERT
2851                          "THERMAL ALERT: unknown thermal alarm received\n");
2852                 return false;
2853         }
2854 }
2855
2856 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2857 {
2858         u32 hkey;
2859         bool send_acpi_ev;
2860         bool ignore_acpi_ev;
2861         bool known_ev;
2862
2863         if (event != 0x80) {
2864                 printk(TPACPI_ERR
2865                        "unknown HKEY notification event %d\n", event);
2866                 /* forward it to userspace, maybe it knows how to handle it */
2867                 acpi_bus_generate_netlink_event(
2868                                         ibm->acpi->device->pnp.device_class,
2869                                         dev_name(&ibm->acpi->device->dev),
2870                                         event, 0);
2871                 return;
2872         }
2873
2874         while (1) {
2875                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2876                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2877                         return;
2878                 }
2879
2880                 if (hkey == 0) {
2881                         /* queue empty */
2882                         return;
2883                 }
2884
2885                 send_acpi_ev = true;
2886                 ignore_acpi_ev = false;
2887
2888                 switch (hkey >> 12) {
2889                 case 1:
2890                         /* 0x1000-0x1FFF: key presses */
2891                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2892                                                  &ignore_acpi_ev);
2893                         break;
2894                 case 2:
2895                         /* 0x2000-0x2FFF: Wakeup reason */
2896                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2897                                                  &ignore_acpi_ev);
2898                         break;
2899                 case 3:
2900                         /* 0x3000-0x3FFF: bay-related wakeups */
2901                         if (hkey == 0x3003) {
2902                                 hotkey_autosleep_ack = 1;
2903                                 printk(TPACPI_INFO
2904                                        "bay ejected\n");
2905                                 hotkey_wakeup_hotunplug_complete_notify_change();
2906                                 known_ev = true;
2907                         } else {
2908                                 known_ev = false;
2909                         }
2910                         break;
2911                 case 4:
2912                         /* 0x4000-0x4FFF: dock-related wakeups */
2913                         if (hkey == 0x4003) {
2914                                 hotkey_autosleep_ack = 1;
2915                                 printk(TPACPI_INFO
2916                                        "undocked\n");
2917                                 hotkey_wakeup_hotunplug_complete_notify_change();
2918                                 known_ev = true;
2919                         } else {
2920                                 known_ev = false;
2921                         }
2922                         break;
2923                 case 5:
2924                         /* 0x5000-0x5FFF: human interface helpers */
2925                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2926                                                  &ignore_acpi_ev);
2927                         break;
2928                 case 6:
2929                         /* 0x6000-0x6FFF: thermal alarms */
2930                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2931                                                  &ignore_acpi_ev);
2932                         break;
2933                 case 7:
2934                         /* 0x7000-0x7FFF: misc */
2935                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2936                                 tpacpi_send_radiosw_update();
2937                                 send_acpi_ev = 0;
2938                                 known_ev = true;
2939                                 break;
2940                         }
2941                         /* fallthrough to default */
2942                 default:
2943                         known_ev = false;
2944                 }
2945                 if (!known_ev) {
2946                         printk(TPACPI_NOTICE
2947                                "unhandled HKEY event 0x%04x\n", hkey);
2948                         printk(TPACPI_NOTICE
2949                                "please report the conditions when this "
2950                                "event happened to %s\n", TPACPI_MAIL);
2951                 }
2952
2953                 /* Legacy events */
2954                 if (!ignore_acpi_ev &&
2955                     (send_acpi_ev || hotkey_report_mode < 2)) {
2956                         acpi_bus_generate_proc_event(ibm->acpi->device,
2957                                                      event, hkey);
2958                 }
2959
2960                 /* netlink events */
2961                 if (!ignore_acpi_ev && send_acpi_ev) {
2962                         acpi_bus_generate_netlink_event(
2963                                         ibm->acpi->device->pnp.device_class,
2964                                         dev_name(&ibm->acpi->device->dev),
2965                                         event, hkey);
2966                 }
2967         }
2968 }
2969
2970 static void hotkey_suspend(pm_message_t state)
2971 {
2972         /* Do these on suspend, we get the events on early resume! */
2973         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2974         hotkey_autosleep_ack = 0;
2975 }
2976
2977 static void hotkey_resume(void)
2978 {
2979         tpacpi_disable_brightness_delay();
2980
2981         if (hotkey_mask_get())
2982                 printk(TPACPI_ERR
2983                        "error while trying to read hot key mask "
2984                        "from firmware\n");
2985         tpacpi_send_radiosw_update();
2986         hotkey_tablet_mode_notify_change();
2987         hotkey_wakeup_reason_notify_change();
2988         hotkey_wakeup_hotunplug_complete_notify_change();
2989         hotkey_poll_setup_safe(0);
2990 }
2991
2992 /* procfs -------------------------------------------------------------- */
2993 static int hotkey_read(char *p)
2994 {
2995         int res, status;
2996         int len = 0;
2997
2998         if (!tp_features.hotkey) {
2999                 len += sprintf(p + len, "status:\t\tnot supported\n");
3000                 return len;
3001         }
3002
3003         if (mutex_lock_killable(&hotkey_mutex))
3004                 return -ERESTARTSYS;
3005         res = hotkey_status_get(&status);
3006         if (!res)
3007                 res = hotkey_mask_get();
3008         mutex_unlock(&hotkey_mutex);
3009         if (res)
3010                 return res;
3011
3012         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
3013         if (tp_features.hotkey_mask) {
3014                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
3015                 len += sprintf(p + len,
3016                                "commands:\tenable, disable, reset, <mask>\n");
3017         } else {
3018                 len += sprintf(p + len, "mask:\t\tnot supported\n");
3019                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
3020         }
3021
3022         return len;
3023 }
3024
3025 static void hotkey_enabledisable_warn(bool enable)
3026 {
3027         tpacpi_log_usertask("procfs hotkey enable/disable");
3028         if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable),
3029                         TPACPI_WARN
3030                         "hotkey enable/disable functionality has been "
3031                         "removed from the driver.  Hotkeys are always "
3032                         "enabled\n"))
3033                 printk(TPACPI_ERR
3034                         "Please remove the hotkey=enable module "
3035                         "parameter, it is deprecated.  Hotkeys are always "
3036                         "enabled\n");
3037 }
3038
3039 static int hotkey_write(char *buf)
3040 {
3041         int res;
3042         u32 mask;
3043         char *cmd;
3044
3045         if (!tp_features.hotkey)
3046                 return -ENODEV;
3047
3048         if (mutex_lock_killable(&hotkey_mutex))
3049                 return -ERESTARTSYS;
3050
3051         mask = hotkey_mask;
3052
3053         res = 0;
3054         while ((cmd = next_cmd(&buf))) {
3055                 if (strlencmp(cmd, "enable") == 0) {
3056                         hotkey_enabledisable_warn(1);
3057                 } else if (strlencmp(cmd, "disable") == 0) {
3058                         hotkey_enabledisable_warn(0);
3059                         res = -EPERM;
3060                 } else if (strlencmp(cmd, "reset") == 0) {
3061                         mask = hotkey_orig_mask;
3062                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
3063                         /* mask set */
3064                 } else if (sscanf(cmd, "%x", &mask) == 1) {
3065                         /* mask set */
3066                 } else {
3067                         res = -EINVAL;
3068                         goto errexit;
3069                 }
3070         }
3071
3072         if (!res)
3073                 tpacpi_disclose_usertask("procfs hotkey",
3074                         "set mask to 0x%08x\n", mask);
3075
3076         if (!res && mask != hotkey_mask)
3077                 res = hotkey_mask_set(mask);
3078
3079 errexit:
3080         mutex_unlock(&hotkey_mutex);
3081         return res;
3082 }
3083
3084 static const struct acpi_device_id ibm_htk_device_ids[] = {
3085         {TPACPI_ACPI_HKEY_HID, 0},
3086         {"", 0},
3087 };
3088
3089 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
3090         .hid = ibm_htk_device_ids,
3091         .notify = hotkey_notify,
3092         .handle = &hkey_handle,
3093         .type = ACPI_DEVICE_NOTIFY,
3094 };
3095
3096 static struct ibm_struct hotkey_driver_data = {
3097         .name = "hotkey",
3098         .read = hotkey_read,
3099         .write = hotkey_write,
3100         .exit = hotkey_exit,
3101         .resume = hotkey_resume,
3102         .suspend = hotkey_suspend,
3103         .acpi = &ibm_hotkey_acpidriver,
3104 };
3105
3106 /*************************************************************************
3107  * Bluetooth subdriver
3108  */
3109
3110 enum {
3111         /* ACPI GBDC/SBDC bits */
3112         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3113         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3114         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3115                                                    off / last state */
3116 };
3117
3118 enum {
3119         /* ACPI \BLTH commands */
3120         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3121         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3122         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3123         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3124         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3125 };
3126
3127 #define TPACPI_RFK_BLUETOOTH_SW_NAME    "tpacpi_bluetooth_sw"
3128
3129 static struct rfkill *tpacpi_bluetooth_rfkill;
3130
3131 static void bluetooth_suspend(pm_message_t state)
3132 {
3133         /* Try to make sure radio will resume powered off */
3134         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3135                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME))
3136                 vdbg_printk(TPACPI_DBG_RFKILL,
3137                         "bluetooth power down on resume request failed\n");
3138 }
3139
3140 static int bluetooth_get_radiosw(void)
3141 {
3142         int status;
3143
3144         if (!tp_features.bluetooth)
3145                 return -ENODEV;
3146
3147         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3148         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3149                 return RFKILL_STATE_HARD_BLOCKED;
3150
3151 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3152         if (dbg_bluetoothemul)
3153                 return (tpacpi_bluetooth_emulstate) ?
3154                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3155 #endif
3156
3157         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3158                 return -EIO;
3159
3160         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3161                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3162 }
3163
3164 static void bluetooth_update_rfk(void)
3165 {
3166         int status;
3167
3168         if (!tpacpi_bluetooth_rfkill)
3169                 return;
3170
3171         status = bluetooth_get_radiosw();
3172         if (status < 0)
3173                 return;
3174         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3175
3176         vdbg_printk(TPACPI_DBG_RFKILL,
3177                 "forced rfkill state to %d\n",
3178                 status);
3179 }
3180
3181 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3182 {
3183         int status;
3184
3185         if (!tp_features.bluetooth)
3186                 return -ENODEV;
3187
3188         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3189          * reason to risk weird behaviour. */
3190         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3191             && radio_on)
3192                 return -EPERM;
3193
3194         vdbg_printk(TPACPI_DBG_RFKILL,
3195                 "will %s bluetooth\n", radio_on ? "enable" : "disable");
3196
3197 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3198         if (dbg_bluetoothemul) {
3199                 tpacpi_bluetooth_emulstate = !!radio_on;
3200                 if (update_rfk)
3201                         bluetooth_update_rfk();
3202                 return 0;
3203         }
3204 #endif
3205
3206         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3207         if (radio_on)
3208                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3209         else
3210                 status = 0;
3211         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3212                 return -EIO;
3213
3214         if (update_rfk)
3215                 bluetooth_update_rfk();
3216
3217         return 0;
3218 }
3219
3220 /* sysfs bluetooth enable ---------------------------------------------- */
3221 static ssize_t bluetooth_enable_show(struct device *dev,
3222                            struct device_attribute *attr,
3223                            char *buf)
3224 {
3225         int status;
3226
3227         printk_deprecated_rfkill_attribute("bluetooth_enable");
3228
3229         status = bluetooth_get_radiosw();
3230         if (status < 0)
3231                 return status;
3232
3233         return snprintf(buf, PAGE_SIZE, "%d\n",
3234                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3235 }
3236
3237 static ssize_t bluetooth_enable_store(struct device *dev,
3238                             struct device_attribute *attr,
3239                             const char *buf, size_t count)
3240 {
3241         unsigned long t;
3242         int res;
3243
3244         printk_deprecated_rfkill_attribute("bluetooth_enable");
3245
3246         if (parse_strtoul(buf, 1, &t))
3247                 return -EINVAL;
3248
3249         tpacpi_disclose_usertask("bluetooth_enable", "set to %ld\n", t);
3250
3251         res = bluetooth_set_radiosw(t, 1);
3252
3253         return (res) ? res : count;
3254 }
3255
3256 static struct device_attribute dev_attr_bluetooth_enable =
3257         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3258                 bluetooth_enable_show, bluetooth_enable_store);
3259
3260 /* --------------------------------------------------------------------- */
3261
3262 static struct attribute *bluetooth_attributes[] = {
3263         &dev_attr_bluetooth_enable.attr,
3264         NULL
3265 };
3266
3267 static const struct attribute_group bluetooth_attr_group = {
3268         .attrs = bluetooth_attributes,
3269 };
3270
3271 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3272 {
3273         int bts = bluetooth_get_radiosw();
3274
3275         if (bts < 0)
3276                 return bts;
3277
3278         *state = bts;
3279         return 0;
3280 }
3281
3282 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3283 {
3284         dbg_printk(TPACPI_DBG_RFKILL,
3285                    "request to change radio state to %d\n", state);
3286         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3287 }
3288
3289 static void bluetooth_shutdown(void)
3290 {
3291         /* Order firmware to save current state to NVRAM */
3292         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3293                         TP_ACPI_BLTH_SAVE_STATE))
3294                 printk(TPACPI_NOTICE
3295                         "failed to save bluetooth state to NVRAM\n");
3296         else
3297                 vdbg_printk(TPACPI_DBG_RFKILL,
3298                         "bluestooth state saved to NVRAM\n");
3299 }
3300
3301 static void bluetooth_exit(void)
3302 {
3303         bluetooth_shutdown();
3304
3305         if (tpacpi_bluetooth_rfkill)
3306                 rfkill_unregister(tpacpi_bluetooth_rfkill);
3307
3308         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3309                         &bluetooth_attr_group);
3310 }
3311
3312 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3313 {
3314         int res;
3315         int status = 0;
3316
3317         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3318                         "initializing bluetooth subdriver\n");
3319
3320         TPACPI_ACPIHANDLE_INIT(hkey);
3321
3322         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3323            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3324         tp_features.bluetooth = hkey_handle &&
3325             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3326
3327         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3328                 "bluetooth is %s, status 0x%02x\n",
3329                 str_supported(tp_features.bluetooth),
3330                 status);
3331
3332 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3333         if (dbg_bluetoothemul) {
3334                 tp_features.bluetooth = 1;
3335                 printk(TPACPI_INFO
3336                         "bluetooth switch emulation enabled\n");
3337         } else
3338 #endif
3339         if (tp_features.bluetooth &&
3340             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3341                 /* no bluetooth hardware present in system */
3342                 tp_features.bluetooth = 0;
3343                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3344                            "bluetooth hardware not installed\n");
3345         }
3346
3347         if (!tp_features.bluetooth)
3348                 return 1;
3349
3350         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3351                                 &bluetooth_attr_group);
3352         if (res)
3353                 return res;
3354
3355         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3356                                 &tpacpi_bluetooth_rfkill,
3357                                 RFKILL_TYPE_BLUETOOTH,
3358                                 TPACPI_RFK_BLUETOOTH_SW_NAME,
3359                                 true,
3360                                 tpacpi_bluetooth_rfk_set,
3361                                 tpacpi_bluetooth_rfk_get);
3362         if (res) {
3363                 bluetooth_exit();
3364                 return res;
3365         }
3366
3367         return 0;
3368 }
3369
3370 /* procfs -------------------------------------------------------------- */
3371 static int bluetooth_read(char *p)
3372 {
3373         int len = 0;
3374         int status = bluetooth_get_radiosw();
3375
3376         if (!tp_features.bluetooth)
3377                 len += sprintf(p + len, "status:\t\tnot supported\n");
3378         else {
3379                 len += sprintf(p + len, "status:\t\t%s\n",
3380                                 (status == RFKILL_STATE_UNBLOCKED) ?
3381                                         "enabled" : "disabled");
3382                 len += sprintf(p + len, "commands:\tenable, disable\n");
3383         }
3384
3385         return len;
3386 }
3387
3388 static int bluetooth_write(char *buf)
3389 {
3390         char *cmd;
3391         int state = -1;
3392
3393         if (!tp_features.bluetooth)
3394                 return -ENODEV;
3395
3396         while ((cmd = next_cmd(&buf))) {
3397                 if (strlencmp(cmd, "enable") == 0) {
3398                         state = 1;
3399                 } else if (strlencmp(cmd, "disable") == 0) {
3400                         state = 0;
3401                 } else
3402                         return -EINVAL;
3403         }
3404
3405         if (state != -1) {
3406                 tpacpi_disclose_usertask("procfs bluetooth",
3407                         "attempt to %s\n",
3408                         state ? "enable" : "disable");
3409                 bluetooth_set_radiosw(state, 1);
3410         }
3411
3412         return 0;
3413 }
3414
3415 static struct ibm_struct bluetooth_driver_data = {
3416         .name = "bluetooth",
3417         .read = bluetooth_read,
3418         .write = bluetooth_write,
3419         .exit = bluetooth_exit,
3420         .suspend = bluetooth_suspend,
3421         .shutdown = bluetooth_shutdown,
3422 };
3423
3424 /*************************************************************************
3425  * Wan subdriver
3426  */
3427
3428 enum {
3429         /* ACPI GWAN/SWAN bits */
3430         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3431         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3432         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3433                                                    off / last state */
3434 };
3435
3436 #define TPACPI_RFK_WWAN_SW_NAME         "tpacpi_wwan_sw"
3437
3438 static struct rfkill *tpacpi_wan_rfkill;
3439
3440 static void wan_suspend(pm_message_t state)
3441 {
3442         /* Try to make sure radio will resume powered off */
3443         if (!acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3444                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME))
3445                 vdbg_printk(TPACPI_DBG_RFKILL,
3446                         "WWAN power down on resume request failed\n");
3447 }
3448
3449 static int wan_get_radiosw(void)
3450 {
3451         int status;
3452
3453         if (!tp_features.wan)
3454                 return -ENODEV;
3455
3456         /* WLSW overrides WWAN in firmware/hardware, reflect that */
3457         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3458                 return RFKILL_STATE_HARD_BLOCKED;
3459
3460 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3461         if (dbg_wwanemul)
3462                 return (tpacpi_wwan_emulstate) ?
3463                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3464 #endif
3465
3466         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3467                 return -EIO;
3468
3469         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3470                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3471 }
3472
3473 static void wan_update_rfk(void)
3474 {
3475         int status;
3476
3477         if (!tpacpi_wan_rfkill)
3478                 return;
3479
3480         status = wan_get_radiosw();
3481         if (status < 0)
3482                 return;
3483         rfkill_force_state(tpacpi_wan_rfkill, status);
3484
3485         vdbg_printk(TPACPI_DBG_RFKILL,
3486                 "forced rfkill state to %d\n",
3487                 status);
3488 }
3489
3490 static int wan_set_radiosw(int radio_on, int update_rfk)
3491 {
3492         int status;
3493
3494         if (!tp_features.wan)
3495                 return -ENODEV;
3496
3497         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3498          * reason to risk weird behaviour. */
3499         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3500             && radio_on)
3501                 return -EPERM;
3502
3503         vdbg_printk(TPACPI_DBG_RFKILL,
3504                 "will %s WWAN\n", radio_on ? "enable" : "disable");
3505
3506 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3507         if (dbg_wwanemul) {
3508                 tpacpi_wwan_emulstate = !!radio_on;
3509                 if (update_rfk)
3510                         wan_update_rfk();
3511                 return 0;
3512         }
3513 #endif
3514
3515         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3516         if (radio_on)
3517                 status = TP_ACPI_WANCARD_RADIOSSW;
3518         else
3519                 status = 0;
3520         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3521                 return -EIO;
3522
3523         if (update_rfk)
3524                 wan_update_rfk();
3525
3526         return 0;
3527 }
3528
3529 /* sysfs wan enable ---------------------------------------------------- */
3530 static ssize_t wan_enable_show(struct device *dev,
3531                            struct device_attribute *attr,
3532                            char *buf)
3533 {
3534         int status;
3535
3536         printk_deprecated_rfkill_attribute("wwan_enable");
3537
3538         status = wan_get_radiosw();
3539         if (status < 0)
3540                 return status;
3541
3542         return snprintf(buf, PAGE_SIZE, "%d\n",
3543                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3544 }
3545
3546 static ssize_t wan_enable_store(struct device *dev,
3547                             struct device_attribute *attr,
3548                             const char *buf, size_t count)
3549 {
3550         unsigned long t;
3551         int res;
3552
3553         printk_deprecated_rfkill_attribute("wwan_enable");
3554
3555         if (parse_strtoul(buf, 1, &t))
3556                 return -EINVAL;
3557
3558         tpacpi_disclose_usertask("wwan_enable", "set to %ld\n", t);
3559
3560         res = wan_set_radiosw(t, 1);
3561
3562         return (res) ? res : count;
3563 }
3564
3565 static struct device_attribute dev_attr_wan_enable =
3566         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3567                 wan_enable_show, wan_enable_store);
3568
3569 /* --------------------------------------------------------------------- */
3570
3571 static struct attribute *wan_attributes[] = {
3572         &dev_attr_wan_enable.attr,
3573         NULL
3574 };
3575
3576 static const struct attribute_group wan_attr_group = {
3577         .attrs = wan_attributes,
3578 };
3579
3580 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3581 {
3582         int wans = wan_get_radiosw();
3583
3584         if (wans < 0)
3585                 return wans;
3586
3587         *state = wans;
3588         return 0;
3589 }
3590
3591 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3592 {
3593         dbg_printk(TPACPI_DBG_RFKILL,
3594                    "request to change radio state to %d\n", state);
3595         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3596 }
3597
3598 static void wan_shutdown(void)
3599 {
3600         /* Order firmware to save current state to NVRAM */
3601         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3602                         TP_ACPI_WGSV_SAVE_STATE))
3603                 printk(TPACPI_NOTICE
3604                         "failed to save WWAN state to NVRAM\n");
3605         else
3606                 vdbg_printk(TPACPI_DBG_RFKILL,
3607                         "WWAN state saved to NVRAM\n");
3608 }
3609
3610 static void wan_exit(void)
3611 {
3612         wan_shutdown();
3613
3614         if (tpacpi_wan_rfkill)
3615                 rfkill_unregister(tpacpi_wan_rfkill);
3616
3617         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3618                 &wan_attr_group);
3619 }
3620
3621 static int __init wan_init(struct ibm_init_struct *iibm)
3622 {
3623         int res;
3624         int status = 0;
3625
3626         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3627                         "initializing wan subdriver\n");
3628
3629         TPACPI_ACPIHANDLE_INIT(hkey);
3630
3631         tp_features.wan = hkey_handle &&
3632             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3633
3634         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3635                 "wan is %s, status 0x%02x\n",
3636                 str_supported(tp_features.wan),
3637                 status);
3638
3639 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3640         if (dbg_wwanemul) {
3641                 tp_features.wan = 1;
3642                 printk(TPACPI_INFO
3643                         "wwan switch emulation enabled\n");
3644         } else
3645 #endif
3646         if (tp_features.wan &&
3647             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3648                 /* no wan hardware present in system */
3649                 tp_features.wan = 0;
3650                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3651                            "wan hardware not installed\n");
3652         }
3653
3654         if (!tp_features.wan)
3655                 return 1;
3656
3657         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3658                                 &wan_attr_group);
3659         if (res)
3660                 return res;
3661
3662         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3663                                 &tpacpi_wan_rfkill,
3664                                 RFKILL_TYPE_WWAN,
3665                                 TPACPI_RFK_WWAN_SW_NAME,
3666                                 true,
3667                                 tpacpi_wan_rfk_set,
3668                                 tpacpi_wan_rfk_get);
3669         if (res) {
3670                 wan_exit();
3671                 return res;
3672         }
3673
3674         return 0;
3675 }
3676
3677 /* procfs -------------------------------------------------------------- */
3678 static int wan_read(char *p)
3679 {
3680         int len = 0;
3681         int status = wan_get_radiosw();
3682
3683         tpacpi_disclose_usertask("procfs wan", "read");
3684
3685         if (!tp_features.wan)
3686                 len += sprintf(p + len, "status:\t\tnot supported\n");
3687         else {
3688                 len += sprintf(p + len, "status:\t\t%s\n",
3689                                 (status == RFKILL_STATE_UNBLOCKED) ?
3690                                         "enabled" : "disabled");
3691                 len += sprintf(p + len, "commands:\tenable, disable\n");
3692         }
3693
3694         return len;
3695 }
3696
3697 static int wan_write(char *buf)
3698 {
3699         char *cmd;
3700         int state = -1;
3701
3702         if (!tp_features.wan)
3703                 return -ENODEV;
3704
3705         while ((cmd = next_cmd(&buf))) {
3706                 if (strlencmp(cmd, "enable") == 0) {
3707                         state = 1;
3708                 } else if (strlencmp(cmd, "disable") == 0) {
3709                         state = 0;
3710                 } else
3711                         return -EINVAL;
3712         }
3713
3714         if (state != -1) {
3715                 tpacpi_disclose_usertask("procfs wan",
3716                         "attempt to %s\n",
3717                         state ? "enable" : "disable");
3718                 wan_set_radiosw(state, 1);
3719         }
3720
3721         return 0;
3722 }
3723
3724 static struct ibm_struct wan_driver_data = {
3725         .name = "wan",
3726         .read = wan_read,
3727         .write = wan_write,
3728         .exit = wan_exit,
3729         .suspend = wan_suspend,
3730         .shutdown = wan_shutdown,
3731 };
3732
3733 /*************************************************************************
3734  * UWB subdriver
3735  */
3736
3737 enum {
3738         /* ACPI GUWB/SUWB bits */
3739         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
3740         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
3741 };
3742
3743 #define TPACPI_RFK_UWB_SW_NAME  "tpacpi_uwb_sw"
3744
3745 static struct rfkill *tpacpi_uwb_rfkill;
3746
3747 static int uwb_get_radiosw(void)
3748 {
3749         int status;
3750
3751         if (!tp_features.uwb)
3752                 return -ENODEV;
3753
3754         /* WLSW overrides UWB in firmware/hardware, reflect that */
3755         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3756                 return RFKILL_STATE_HARD_BLOCKED;
3757
3758 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3759         if (dbg_uwbemul)
3760                 return (tpacpi_uwb_emulstate) ?
3761                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3762 #endif
3763
3764         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3765                 return -EIO;
3766
3767         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3768                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3769 }
3770
3771 static void uwb_update_rfk(void)
3772 {
3773         int status;
3774
3775         if (!tpacpi_uwb_rfkill)
3776                 return;
3777
3778         status = uwb_get_radiosw();
3779         if (status < 0)
3780                 return;
3781         rfkill_force_state(tpacpi_uwb_rfkill, status);
3782
3783         vdbg_printk(TPACPI_DBG_RFKILL,
3784                 "forced rfkill state to %d\n",
3785                 status);
3786 }
3787
3788 static int uwb_set_radiosw(int radio_on, int update_rfk)
3789 {
3790         int status;
3791
3792         if (!tp_features.uwb)
3793                 return -ENODEV;
3794
3795         /* WLSW overrides UWB in firmware/hardware, but there is no
3796          * reason to risk weird behaviour. */
3797         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3798             && radio_on)
3799                 return -EPERM;
3800
3801         vdbg_printk(TPACPI_DBG_RFKILL,
3802                         "will %s UWB\n", radio_on ? "enable" : "disable");
3803
3804 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3805         if (dbg_uwbemul) {
3806                 tpacpi_uwb_emulstate = !!radio_on;
3807                 if (update_rfk)
3808                         uwb_update_rfk();
3809                 return 0;
3810         }
3811 #endif
3812
3813         status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3814         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3815                 return -EIO;
3816
3817         if (update_rfk)
3818                 uwb_update_rfk();
3819
3820         return 0;
3821 }
3822
3823 /* --------------------------------------------------------------------- */
3824
3825 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3826 {
3827         int uwbs = uwb_get_radiosw();
3828
3829         if (uwbs < 0)
3830                 return uwbs;
3831
3832         *state = uwbs;
3833         return 0;
3834 }
3835
3836 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3837 {
3838         dbg_printk(TPACPI_DBG_RFKILL,
3839                    "request to change radio state to %d\n", state);
3840         return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3841 }
3842
3843 static void uwb_exit(void)
3844 {
3845         if (tpacpi_uwb_rfkill)
3846                 rfkill_unregister(tpacpi_uwb_rfkill);
3847 }
3848
3849 static int __init uwb_init(struct ibm_init_struct *iibm)
3850 {
3851         int res;
3852         int status = 0;
3853
3854         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3855                         "initializing uwb subdriver\n");
3856
3857         TPACPI_ACPIHANDLE_INIT(hkey);
3858
3859         tp_features.uwb = hkey_handle &&
3860             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3861
3862         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL,
3863                 "uwb is %s, status 0x%02x\n",
3864                 str_supported(tp_features.uwb),
3865                 status);
3866
3867 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3868         if (dbg_uwbemul) {
3869                 tp_features.uwb = 1;
3870                 printk(TPACPI_INFO
3871                         "uwb switch emulation enabled\n");
3872         } else
3873 #endif
3874         if (tp_features.uwb &&
3875             !(status & TP_ACPI_UWB_HWPRESENT)) {
3876                 /* no uwb hardware present in system */
3877                 tp_features.uwb = 0;
3878                 dbg_printk(TPACPI_DBG_INIT,
3879                            "uwb hardware not installed\n");
3880         }
3881
3882         if (!tp_features.uwb)
3883                 return 1;
3884
3885         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3886                                 &tpacpi_uwb_rfkill,
3887                                 RFKILL_TYPE_UWB,
3888                                 TPACPI_RFK_UWB_SW_NAME,
3889                                 false,
3890                                 tpacpi_uwb_rfk_set,
3891                                 tpacpi_uwb_rfk_get);
3892
3893         return res;
3894 }
3895
3896 static struct ibm_struct uwb_driver_data = {
3897         .name = "uwb",
3898         .exit = uwb_exit,
3899         .flags.experimental = 1,
3900 };
3901
3902 /*************************************************************************
3903  * Video subdriver
3904  */
3905
3906 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3907
3908 enum video_access_mode {
3909         TPACPI_VIDEO_NONE = 0,
3910         TPACPI_VIDEO_570,       /* 570 */
3911         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3912         TPACPI_VIDEO_NEW,       /* all others */
3913 };
3914
3915 enum {  /* video status flags, based on VIDEO_570 */
3916         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3917         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3918         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3919 };
3920
3921 enum {  /* TPACPI_VIDEO_570 constants */
3922         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3923         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3924                                                  * video_status_flags */
3925         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3926         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3927 };
3928
3929 static enum video_access_mode video_supported;
3930 static int video_orig_autosw;
3931
3932 static int video_autosw_get(void);
3933 static int video_autosw_set(int enable);
3934
3935 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3936
3937 static int __init video_init(struct ibm_init_struct *iibm)
3938 {
3939         int ivga;
3940
3941         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3942
3943         TPACPI_ACPIHANDLE_INIT(vid);
3944         TPACPI_ACPIHANDLE_INIT(vid2);
3945
3946         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3947                 /* G41, assume IVGA doesn't change */
3948                 vid_handle = vid2_handle;
3949
3950         if (!vid_handle)
3951                 /* video switching not supported on R30, R31 */
3952                 video_supported = TPACPI_VIDEO_NONE;
3953         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3954                 /* 570 */
3955                 video_supported = TPACPI_VIDEO_570;
3956         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3957                 /* 600e/x, 770e, 770x */
3958                 video_supported = TPACPI_VIDEO_770;
3959         else
3960                 /* all others */
3961                 video_supported = TPACPI_VIDEO_NEW;
3962
3963         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3964                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3965                 video_supported);
3966
3967         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3968 }
3969
3970 static void video_exit(void)
3971 {
3972         dbg_printk(TPACPI_DBG_EXIT,
3973                    "restoring original video autoswitch mode\n");
3974         if (video_autosw_set(video_orig_autosw))
3975                 printk(TPACPI_ERR "error while trying to restore original "
3976                         "video autoswitch mode\n");
3977 }
3978
3979 static int video_outputsw_get(void)
3980 {
3981         int status = 0;
3982         int i;
3983
3984         switch (video_supported) {
3985         case TPACPI_VIDEO_570:
3986                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3987                                  TP_ACPI_VIDEO_570_PHSCMD))
3988                         return -EIO;
3989                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3990                 break;
3991         case TPACPI_VIDEO_770:
3992                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3993                         return -EIO;
3994                 if (i)
3995                         status |= TP_ACPI_VIDEO_S_LCD;
3996                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3997                         return -EIO;
3998                 if (i)
3999                         status |= TP_ACPI_VIDEO_S_CRT;
4000                 break;
4001         case TPACPI_VIDEO_NEW:
4002                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
4003                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
4004                         return -EIO;
4005                 if (i)
4006                         status |= TP_ACPI_VIDEO_S_CRT;
4007
4008                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
4009                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
4010                         return -EIO;
4011                 if (i)
4012                         status |= TP_ACPI_VIDEO_S_LCD;
4013                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
4014                         return -EIO;
4015                 if (i)
4016                         status |= TP_ACPI_VIDEO_S_DVI;
4017                 break;
4018         default:
4019                 return -ENOSYS;
4020         }
4021
4022         return status;
4023 }
4024
4025 static int video_outputsw_set(int status)
4026 {
4027         int autosw;
4028         int res = 0;
4029
4030         switch (video_supported) {
4031         case TPACPI_VIDEO_570:
4032                 res = acpi_evalf(NULL, NULL,
4033                                  "\\_SB.PHS2", "vdd",
4034                                  TP_ACPI_VIDEO_570_PHS2CMD,
4035                                  status | TP_ACPI_VIDEO_570_PHS2SET);
4036                 break;
4037         case TPACPI_VIDEO_770:
4038                 autosw = video_autosw_get();
4039                 if (autosw < 0)
4040                         return autosw;
4041
4042                 res = video_autosw_set(1);
4043                 if (res)
4044                         return res;
4045                 res = acpi_evalf(vid_handle, NULL,
4046                                  "ASWT", "vdd", status * 0x100, 0);
4047                 if (!autosw && video_autosw_set(autosw)) {
4048                         printk(TPACPI_ERR
4049                                "video auto-switch left enabled due to error\n");
4050                         return -EIO;
4051                 }
4052                 break;
4053         case TPACPI_VIDEO_NEW:
4054                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
4055                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
4056                 break;
4057         default:
4058                 return -ENOSYS;
4059         }
4060
4061         return (res)? 0 : -EIO;
4062 }
4063
4064 static int video_autosw_get(void)
4065 {
4066         int autosw = 0;
4067
4068         switch (video_supported) {
4069         case TPACPI_VIDEO_570:
4070                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
4071                         return -EIO;
4072                 break;
4073         case TPACPI_VIDEO_770:
4074         case TPACPI_VIDEO_NEW:
4075                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
4076                         return -EIO;
4077                 break;
4078         default:
4079                 return -ENOSYS;
4080         }
4081
4082         return autosw & 1;
4083 }
4084
4085 static int video_autosw_set(int enable)
4086 {
4087         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
4088                 return -EIO;
4089         return 0;
4090 }
4091
4092 static int video_outputsw_cycle(void)
4093 {
4094         int autosw = video_autosw_get();
4095         int res;
4096
4097         if (autosw < 0)
4098                 return autosw;
4099
4100         switch (video_supported) {
4101         case TPACPI_VIDEO_570:
4102                 res = video_autosw_set(1);
4103                 if (res)
4104                         return res;
4105                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
4106                 break;
4107         case TPACPI_VIDEO_770:
4108         case TPACPI_VIDEO_NEW:
4109                 res = video_autosw_set(1);
4110                 if (res)
4111                         return res;
4112                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
4113                 break;
4114         default:
4115                 return -ENOSYS;
4116         }
4117         if (!autosw && video_autosw_set(autosw)) {
4118                 printk(TPACPI_ERR
4119                        "video auto-switch left enabled due to error\n");
4120                 return -EIO;
4121         }
4122
4123         return (res)? 0 : -EIO;
4124 }
4125
4126 static int video_expand_toggle(void)
4127 {
4128         switch (video_supported) {
4129         case TPACPI_VIDEO_570:
4130                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
4131                         0 : -EIO;
4132         case TPACPI_VIDEO_770:
4133                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
4134                         0 : -EIO;
4135         case TPACPI_VIDEO_NEW:
4136                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
4137                         0 : -EIO;
4138         default:
4139                 return -ENOSYS;
4140         }
4141         /* not reached */
4142 }
4143
4144 static int video_read(char *p)
4145 {
4146         int status, autosw;
4147         int len = 0;
4148
4149         if (video_supported == TPACPI_VIDEO_NONE) {
4150                 len += sprintf(p + len, "status:\t\tnot supported\n");
4151                 return len;
4152         }
4153
4154         status = video_outputsw_get();
4155         if (status < 0)
4156                 return status;
4157
4158         autosw = video_autosw_get();
4159         if (autosw < 0)
4160                 return autosw;
4161
4162         len += sprintf(p + len, "status:\t\tsupported\n");
4163         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
4164         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
4165         if (video_supported == TPACPI_VIDEO_NEW)
4166                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
4167         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
4168         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
4169         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
4170         if (video_supported == TPACPI_VIDEO_NEW)
4171                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
4172         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
4173         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
4174
4175         return len;
4176 }
4177
4178 static int video_write(char *buf)
4179 {
4180         char *cmd;
4181         int enable, disable, status;
4182         int res;
4183
4184         if (video_supported == TPACPI_VIDEO_NONE)
4185                 return -ENODEV;
4186
4187         enable = 0;
4188         disable = 0;
4189
4190         while ((cmd = next_cmd(&buf))) {
4191                 if (strlencmp(cmd, "lcd_enable") == 0) {
4192                         enable |= TP_ACPI_VIDEO_S_LCD;
4193                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4194                         disable |= TP_ACPI_VIDEO_S_LCD;
4195                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4196                         enable |= TP_ACPI_VIDEO_S_CRT;
4197                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4198                         disable |= TP_ACPI_VIDEO_S_CRT;
4199                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4200                            strlencmp(cmd, "dvi_enable") == 0) {
4201                         enable |= TP_ACPI_VIDEO_S_DVI;
4202                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4203                            strlencmp(cmd, "dvi_disable") == 0) {
4204                         disable |= TP_ACPI_VIDEO_S_DVI;
4205                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4206                         res = video_autosw_set(1);
4207                         if (res)
4208                                 return res;
4209                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4210                         res = video_autosw_set(0);
4211                         if (res)
4212                                 return res;
4213                 } else if (strlencmp(cmd, "video_switch") == 0) {
4214                         res = video_outputsw_cycle();
4215                         if (res)
4216                                 return res;
4217                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4218                         res = video_expand_toggle();
4219                         if (res)
4220                                 return res;
4221                 } else
4222                         return -EINVAL;
4223         }
4224
4225         if (enable || disable) {
4226                 status = video_outputsw_get();
4227                 if (status < 0)
4228                         return status;
4229                 res = video_outputsw_set((status & ~disable) | enable);
4230                 if (res)
4231                         return res;
4232         }
4233
4234         return 0;
4235 }
4236
4237 static struct ibm_struct video_driver_data = {
4238         .name = "video",
4239         .read = video_read,
4240         .write = video_write,
4241         .exit = video_exit,
4242 };
4243
4244 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4245
4246 /*************************************************************************
4247  * Light (thinklight) subdriver
4248  */
4249
4250 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4251 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4252
4253 static int light_get_status(void)
4254 {
4255         int status = 0;
4256
4257         if (tp_features.light_status) {
4258                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4259                         return -EIO;
4260                 return (!!status);
4261         }
4262
4263         return -ENXIO;
4264 }
4265
4266 static int light_set_status(int status)
4267 {
4268         int rc;
4269
4270         if (tp_features.light) {
4271                 if (cmos_handle) {
4272                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4273                                         (status)?
4274                                                 TP_CMOS_THINKLIGHT_ON :
4275                                                 TP_CMOS_THINKLIGHT_OFF);
4276                 } else {
4277                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4278                                         (status)? 1 : 0);
4279                 }
4280                 return (rc)? 0 : -EIO;
4281         }
4282
4283         return -ENXIO;
4284 }
4285
4286 static void light_set_status_worker(struct work_struct *work)
4287 {
4288         struct tpacpi_led_classdev *data =
4289                         container_of(work, struct tpacpi_led_classdev, work);
4290
4291         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4292                 light_set_status((data->new_state != TPACPI_LED_OFF));
4293 }
4294
4295 static void light_sysfs_set(struct led_classdev *led_cdev,
4296                         enum led_brightness brightness)
4297 {
4298         struct tpacpi_led_classdev *data =
4299                 container_of(led_cdev,
4300                              struct tpacpi_led_classdev,
4301                              led_classdev);
4302         data->new_state = (brightness != LED_OFF) ?
4303                                 TPACPI_LED_ON : TPACPI_LED_OFF;
4304         queue_work(tpacpi_wq, &data->work);
4305 }
4306
4307 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4308 {
4309         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4310 }
4311
4312 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4313         .led_classdev = {
4314                 .name           = "tpacpi::thinklight",
4315                 .brightness_set = &light_sysfs_set,
4316                 .brightness_get = &light_sysfs_get,
4317         }
4318 };
4319
4320 static int __init light_init(struct ibm_init_struct *iibm)
4321 {
4322         int rc;
4323
4324         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4325
4326         TPACPI_ACPIHANDLE_INIT(ledb);
4327         TPACPI_ACPIHANDLE_INIT(lght);
4328         TPACPI_ACPIHANDLE_INIT(cmos);
4329         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4330
4331         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4332         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4333
4334         if (tp_features.light)
4335                 /* light status not supported on
4336                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4337                 tp_features.light_status =
4338                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4339
4340         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4341                 str_supported(tp_features.light),
4342                 str_supported(tp_features.light_status));
4343
4344         if (!tp_features.light)
4345                 return 1;
4346
4347         rc = led_classdev_register(&tpacpi_pdev->dev,
4348                                    &tpacpi_led_thinklight.led_classdev);
4349
4350         if (rc < 0) {
4351                 tp_features.light = 0;
4352                 tp_features.light_status = 0;
4353         } else  {
4354                 rc = 0;
4355         }
4356
4357         return rc;
4358 }
4359
4360 static void light_exit(void)
4361 {
4362         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4363         if (work_pending(&tpacpi_led_thinklight.work))
4364                 flush_workqueue(tpacpi_wq);
4365 }
4366
4367 static int light_read(char *p)
4368 {
4369         int len = 0;
4370         int status;
4371
4372         if (!tp_features.light) {
4373                 len += sprintf(p + len, "status:\t\tnot supported\n");
4374         } else if (!tp_features.light_status) {
4375                 len += sprintf(p + len, "status:\t\tunknown\n");
4376                 len += sprintf(p + len, "commands:\ton, off\n");
4377         } else {
4378                 status = light_get_status();
4379                 if (status < 0)
4380                         return status;
4381                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4382                 len += sprintf(p + len, "commands:\ton, off\n");
4383         }
4384
4385         return len;
4386 }
4387
4388 static int light_write(char *buf)
4389 {
4390         char *cmd;
4391         int newstatus = 0;
4392
4393         if (!tp_features.light)
4394                 return -ENODEV;
4395
4396         while ((cmd = next_cmd(&buf))) {
4397                 if (strlencmp(cmd, "on") == 0) {
4398                         newstatus = 1;
4399                 } else if (strlencmp(cmd, "off") == 0) {
4400                         newstatus = 0;
4401                 } else
4402                         return -EINVAL;
4403         }
4404
4405         return light_set_status(newstatus);
4406 }
4407
4408 static struct ibm_struct light_driver_data = {
4409         .name = "light",
4410         .read = light_read,
4411         .write = light_write,
4412         .exit = light_exit,
4413 };
4414
4415 /*************************************************************************
4416  * Dock subdriver
4417  */
4418
4419 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4420
4421 static void dock_notify(struct ibm_struct *ibm, u32 event);
4422 static int dock_read(char *p);
4423 static int dock_write(char *buf);
4424
4425 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4426            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4427            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
4428            "\\_SB.PCI.ISA.SLCE",        /* 570 */
4429     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4430
4431 /* don't list other alternatives as we install a notify handler on the 570 */
4432 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
4433
4434 static const struct acpi_device_id ibm_pci_device_ids[] = {
4435         {PCI_ROOT_HID_STRING, 0},
4436         {"", 0},
4437 };
4438
4439 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4440         {
4441          .notify = dock_notify,
4442          .handle = &dock_handle,
4443          .type = ACPI_SYSTEM_NOTIFY,
4444         },
4445         {
4446         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4447          * We just use it to get notifications of dock hotplug
4448          * in very old thinkpads */
4449          .hid = ibm_pci_device_ids,
4450          .notify = dock_notify,
4451          .handle = &pci_handle,
4452          .type = ACPI_SYSTEM_NOTIFY,
4453         },
4454 };
4455
4456 static struct ibm_struct dock_driver_data[2] = {
4457         {
4458          .name = "dock",
4459          .read = dock_read,
4460          .write = dock_write,
4461          .acpi = &ibm_dock_acpidriver[0],
4462         },
4463         {
4464          .name = "dock",
4465          .acpi = &ibm_dock_acpidriver[1],
4466         },
4467 };
4468
4469 #define dock_docked() (_sta(dock_handle) & 1)
4470
4471 static int __init dock_init(struct ibm_init_struct *iibm)
4472 {
4473         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4474
4475         TPACPI_ACPIHANDLE_INIT(dock);
4476
4477         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4478                 str_supported(dock_handle != NULL));
4479
4480         return (dock_handle)? 0 : 1;
4481 }
4482
4483 static int __init dock_init2(struct ibm_init_struct *iibm)
4484 {
4485         int dock2_needed;
4486
4487         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4488
4489         if (dock_driver_data[0].flags.acpi_driver_registered &&
4490             dock_driver_data[0].flags.acpi_notify_installed) {
4491                 TPACPI_ACPIHANDLE_INIT(pci);
4492                 dock2_needed = (pci_handle != NULL);
4493                 vdbg_printk(TPACPI_DBG_INIT,
4494                             "dock PCI handler for the TP 570 is %s\n",
4495                             str_supported(dock2_needed));
4496         } else {
4497                 vdbg_printk(TPACPI_DBG_INIT,
4498                 "dock subdriver part 2 not required\n");
4499                 dock2_needed = 0;
4500         }
4501
4502         return (dock2_needed)? 0 : 1;
4503 }
4504
4505 static void dock_notify(struct ibm_struct *ibm, u32 event)
4506 {
4507         int docked = dock_docked();
4508         int pci = ibm->acpi->hid && ibm->acpi->device &&
4509                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4510         int data;
4511
4512         if (event == 1 && !pci) /* 570 */
4513                 data = 1;       /* button */
4514         else if (event == 1 && pci)     /* 570 */
4515                 data = 3;       /* dock */
4516         else if (event == 3 && docked)
4517                 data = 1;       /* button */
4518         else if (event == 3 && !docked)
4519                 data = 2;       /* undock */
4520         else if (event == 0 && docked)
4521                 data = 3;       /* dock */
4522         else {
4523                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4524                        event, _sta(dock_handle));
4525                 data = 0;       /* unknown */
4526         }
4527         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4528         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4529                                           dev_name(&ibm->acpi->device->dev),
4530                                           event, data);
4531 }
4532
4533 static int dock_read(char *p)
4534 {
4535         int len = 0;
4536         int docked = dock_docked();
4537
4538         if (!dock_handle)
4539                 len += sprintf(p + len, "status:\t\tnot supported\n");
4540         else if (!docked)
4541                 len += sprintf(p + len, "status:\t\tundocked\n");
4542         else {
4543                 len += sprintf(p + len, "status:\t\tdocked\n");
4544                 len += sprintf(p + len, "commands:\tdock, undock\n");
4545         }
4546
4547         return len;
4548 }
4549
4550 static int dock_write(char *buf)
4551 {
4552         char *cmd;
4553
4554         if (!dock_docked())
4555                 return -ENODEV;
4556
4557         while ((cmd = next_cmd(&buf))) {
4558                 if (strlencmp(cmd, "undock") == 0) {
4559                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4560                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4561                                 return -EIO;
4562                 } else if (strlencmp(cmd, "dock") == 0) {
4563                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4564                                 return -EIO;
4565                 } else
4566                         return -EINVAL;
4567         }
4568
4569         return 0;
4570 }
4571
4572 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4573
4574 /*************************************************************************
4575  * Bay subdriver
4576  */
4577
4578 #ifdef CONFIG_THINKPAD_ACPI_BAY
4579
4580 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
4581            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4582            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4583            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4584            );                           /* A21e, R30, R31 */
4585 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
4586            "_EJ0",              /* all others */
4587            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4588 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
4589            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4590            );                           /* all others */
4591 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
4592            "_EJ0",                      /* 770x */
4593            );                           /* all others */
4594
4595 static int __init bay_init(struct ibm_init_struct *iibm)
4596 {
4597         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4598
4599         TPACPI_ACPIHANDLE_INIT(bay);
4600         if (bay_handle)
4601                 TPACPI_ACPIHANDLE_INIT(bay_ej);
4602         TPACPI_ACPIHANDLE_INIT(bay2);
4603         if (bay2_handle)
4604                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4605
4606         tp_features.bay_status = bay_handle &&
4607                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4608         tp_features.bay_status2 = bay2_handle &&
4609                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4610
4611         tp_features.bay_eject = bay_handle && bay_ej_handle &&
4612                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4613         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4614                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4615
4616         vdbg_printk(TPACPI_DBG_INIT,
4617                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4618                 str_supported(tp_features.bay_status),
4619                 str_supported(tp_features.bay_eject),
4620                 str_supported(tp_features.bay_status2),
4621                 str_supported(tp_features.bay_eject2));
4622
4623         return (tp_features.bay_status || tp_features.bay_eject ||
4624                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4625 }
4626
4627 static void bay_notify(struct ibm_struct *ibm, u32 event)
4628 {
4629         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4630         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4631                                           dev_name(&ibm->acpi->device->dev),
4632                                           event, 0);
4633 }
4634
4635 #define bay_occupied(b) (_sta(b##_handle) & 1)
4636
4637 static int bay_read(char *p)
4638 {
4639         int len = 0;
4640         int occupied = bay_occupied(bay);
4641         int occupied2 = bay_occupied(bay2);
4642         int eject, eject2;
4643
4644         len += sprintf(p + len, "status:\t\t%s\n",
4645                 tp_features.bay_status ?
4646                         (occupied ? "occupied" : "unoccupied") :
4647                                 "not supported");
4648         if (tp_features.bay_status2)
4649                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4650                                "occupied" : "unoccupied");
4651
4652         eject = tp_features.bay_eject && occupied;
4653         eject2 = tp_features.bay_eject2 && occupied2;
4654
4655         if (eject && eject2)
4656                 len += sprintf(p + len, "commands:\teject, eject2\n");
4657         else if (eject)
4658                 len += sprintf(p + len, "commands:\teject\n");
4659         else if (eject2)
4660                 len += sprintf(p + len, "commands:\teject2\n");
4661
4662         return len;
4663 }
4664
4665 static int bay_write(char *buf)
4666 {
4667         char *cmd;
4668
4669         if (!tp_features.bay_eject && !tp_features.bay_eject2)
4670                 return -ENODEV;
4671
4672         while ((cmd = next_cmd(&buf))) {
4673                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4674                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4675                                 return -EIO;
4676                 } else if (tp_features.bay_eject2 &&
4677                            strlencmp(cmd, "eject2") == 0) {
4678                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4679                                 return -EIO;
4680                 } else
4681                         return -EINVAL;
4682         }
4683
4684         return 0;
4685 }
4686
4687 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4688         .notify = bay_notify,
4689         .handle = &bay_handle,
4690         .type = ACPI_SYSTEM_NOTIFY,
4691 };
4692
4693 static struct ibm_struct bay_driver_data = {
4694         .name = "bay",
4695         .read = bay_read,
4696         .write = bay_write,
4697         .acpi = &ibm_bay_acpidriver,
4698 };
4699
4700 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4701
4702 /*************************************************************************
4703  * CMOS subdriver
4704  */
4705
4706 /* sysfs cmos_command -------------------------------------------------- */
4707 static ssize_t cmos_command_store(struct device *dev,
4708                             struct device_attribute *attr,
4709                             const char *buf, size_t count)
4710 {
4711         unsigned long cmos_cmd;
4712         int res;
4713
4714         if (parse_strtoul(buf, 21, &cmos_cmd))
4715                 return -EINVAL;
4716
4717         res = issue_thinkpad_cmos_command(cmos_cmd);
4718         return (res)? res : count;
4719 }
4720
4721 static struct device_attribute dev_attr_cmos_command =
4722         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4723
4724 /* --------------------------------------------------------------------- */
4725
4726 static int __init cmos_init(struct ibm_init_struct *iibm)
4727 {
4728         int res;
4729
4730         vdbg_printk(TPACPI_DBG_INIT,
4731                 "initializing cmos commands subdriver\n");
4732
4733         TPACPI_ACPIHANDLE_INIT(cmos);
4734
4735         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4736                 str_supported(cmos_handle != NULL));
4737
4738         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4739         if (res)
4740                 return res;
4741
4742         return (cmos_handle)? 0 : 1;
4743 }
4744
4745 static void cmos_exit(void)
4746 {
4747         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4748 }
4749
4750 static int cmos_read(char *p)
4751 {
4752         int len = 0;
4753
4754         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4755            R30, R31, T20-22, X20-21 */
4756         if (!cmos_handle)
4757                 len += sprintf(p + len, "status:\t\tnot supported\n");
4758         else {
4759                 len += sprintf(p + len, "status:\t\tsupported\n");
4760                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4761         }
4762
4763         return len;
4764 }
4765
4766 static int cmos_write(char *buf)
4767 {
4768         char *cmd;
4769         int cmos_cmd, res;
4770
4771         while ((cmd = next_cmd(&buf))) {
4772                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4773                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4774                         /* cmos_cmd set */
4775                 } else
4776                         return -EINVAL;
4777
4778                 res = issue_thinkpad_cmos_command(cmos_cmd);
4779                 if (res)
4780                         return res;
4781         }
4782
4783         return 0;
4784 }
4785
4786 static struct ibm_struct cmos_driver_data = {
4787         .name = "cmos",
4788         .read = cmos_read,
4789         .write = cmos_write,
4790         .exit = cmos_exit,
4791 };
4792
4793 /*************************************************************************
4794  * LED subdriver
4795  */
4796
4797 enum led_access_mode {
4798         TPACPI_LED_NONE = 0,
4799         TPACPI_LED_570, /* 570 */
4800         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4801         TPACPI_LED_NEW, /* all others */
4802 };
4803
4804 enum {  /* For TPACPI_LED_OLD */
4805         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4806         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4807         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4808 };
4809
4810 static enum led_access_mode led_supported;
4811
4812 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4813            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4814                                 /* T20-22, X20-21 */
4815            "LED",               /* all others */
4816            );                   /* R30, R31 */
4817
4818 #define TPACPI_LED_NUMLEDS 8
4819 static struct tpacpi_led_classdev *tpacpi_leds;
4820 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4821 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4822         /* there's a limit of 19 chars + NULL before 2.6.26 */
4823         "tpacpi::power",
4824         "tpacpi:orange:batt",
4825         "tpacpi:green:batt",
4826         "tpacpi::dock_active",
4827         "tpacpi::bay_active",
4828         "tpacpi::dock_batt",
4829         "tpacpi::unknown_led",
4830         "tpacpi::standby",
4831 };
4832 #define TPACPI_SAFE_LEDS        0x0081U
4833
4834 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4835 {
4836 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4837         return false;
4838 #else
4839         return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4840 #endif
4841 }
4842
4843 static int led_get_status(const unsigned int led)
4844 {
4845         int status;
4846         enum led_status_t led_s;
4847
4848         switch (led_supported) {
4849         case TPACPI_LED_570:
4850                 if (!acpi_evalf(ec_handle,
4851                                 &status, "GLED", "dd", 1 << led))
4852                         return -EIO;
4853                 led_s = (status == 0)?
4854                                 TPACPI_LED_OFF :
4855                                 ((status == 1)?
4856                                         TPACPI_LED_ON :
4857                                         TPACPI_LED_BLINK);
4858                 tpacpi_led_state_cache[led] = led_s;
4859                 return led_s;
4860         default:
4861                 return -ENXIO;
4862         }
4863
4864         /* not reached */
4865 }
4866
4867 static int led_set_status(const unsigned int led,
4868                           const enum led_status_t ledstatus)
4869 {
4870         /* off, on, blink. Index is led_status_t */
4871         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4872         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4873
4874         int rc = 0;
4875
4876         switch (led_supported) {
4877         case TPACPI_LED_570:
4878                 /* 570 */
4879                 if (unlikely(led > 7))
4880                         return -EINVAL;
4881                 if (unlikely(tpacpi_is_led_restricted(led)))
4882                         return -EPERM;
4883                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4884                                 (1 << led), led_sled_arg1[ledstatus]))
4885                         rc = -EIO;
4886                 break;
4887         case TPACPI_LED_OLD:
4888                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4889                 if (unlikely(led > 7))
4890                         return -EINVAL;
4891                 if (unlikely(tpacpi_is_led_restricted(led)))
4892                         return -EPERM;
4893                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4894                 if (rc >= 0)
4895                         rc = ec_write(TPACPI_LED_EC_HLBL,
4896                                       (ledstatus == TPACPI_LED_BLINK) << led);
4897                 if (rc >= 0)
4898                         rc = ec_write(TPACPI_LED_EC_HLCL,
4899                                       (ledstatus != TPACPI_LED_OFF) << led);
4900                 break;
4901         case TPACPI_LED_NEW:
4902                 /* all others */
4903                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4904                         return -EINVAL;
4905                 if (unlikely(tpacpi_is_led_restricted(led)))
4906                         return -EPERM;
4907                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4908                                 led, led_led_arg1[ledstatus]))
4909                         rc = -EIO;
4910                 break;
4911         default:
4912                 rc = -ENXIO;
4913         }
4914
4915         if (!rc)
4916                 tpacpi_led_state_cache[led] = ledstatus;
4917
4918         return rc;
4919 }
4920
4921 static void led_set_status_worker(struct work_struct *work)
4922 {
4923         struct tpacpi_led_classdev *data =
4924                 container_of(work, struct tpacpi_led_classdev, work);
4925
4926         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4927                 led_set_status(data->led, data->new_state);
4928 }
4929
4930 static void led_sysfs_set(struct led_classdev *led_cdev,
4931                         enum led_brightness brightness)
4932 {
4933         struct tpacpi_led_classdev *data = container_of(led_cdev,
4934                              struct tpacpi_led_classdev, led_classdev);
4935
4936         if (brightness == LED_OFF)
4937                 data->new_state = TPACPI_LED_OFF;
4938         else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK)
4939                 data->new_state = TPACPI_LED_ON;
4940         else
4941                 data->new_state = TPACPI_LED_BLINK;
4942
4943         queue_work(tpacpi_wq, &data->work);
4944 }
4945
4946 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4947                         unsigned long *delay_on, unsigned long *delay_off)
4948 {
4949         struct tpacpi_led_classdev *data = container_of(led_cdev,
4950                              struct tpacpi_led_classdev, led_classdev);
4951
4952         /* Can we choose the flash rate? */
4953         if (*delay_on == 0 && *delay_off == 0) {
4954                 /* yes. set them to the hardware blink rate (1 Hz) */
4955                 *delay_on = 500; /* ms */
4956                 *delay_off = 500; /* ms */
4957         } else if ((*delay_on != 500) || (*delay_off != 500))
4958                 return -EINVAL;
4959
4960         data->new_state = TPACPI_LED_BLINK;
4961         queue_work(tpacpi_wq, &data->work);
4962
4963         return 0;
4964 }
4965
4966 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4967 {
4968         int rc;
4969
4970         struct tpacpi_led_classdev *data = container_of(led_cdev,
4971                              struct tpacpi_led_classdev, led_classdev);
4972
4973         rc = led_get_status(data->led);
4974
4975         if (rc == TPACPI_LED_OFF || rc < 0)
4976                 rc = LED_OFF;   /* no error handling in led class :( */
4977         else
4978                 rc = LED_FULL;
4979
4980         return rc;
4981 }
4982
4983 static void led_exit(void)
4984 {
4985         unsigned int i;
4986
4987         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4988                 if (tpacpi_leds[i].led_classdev.name)
4989                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4990         }
4991
4992         kfree(tpacpi_leds);
4993 }
4994
4995 static int __init tpacpi_init_led(unsigned int led)
4996 {
4997         int rc;
4998
4999         tpacpi_leds[led].led = led;
5000
5001         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
5002         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
5003         if (led_supported == TPACPI_LED_570)
5004                 tpacpi_leds[led].led_classdev.brightness_get =
5005                                                 &led_sysfs_get;
5006
5007         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
5008
5009         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
5010
5011         rc = led_classdev_register(&tpacpi_pdev->dev,
5012                                 &tpacpi_leds[led].led_classdev);
5013         if (rc < 0)
5014                 tpacpi_leds[led].led_classdev.name = NULL;
5015
5016         return rc;
5017 }
5018
5019 static int __init led_init(struct ibm_init_struct *iibm)
5020 {
5021         unsigned int i;
5022         int rc;
5023
5024         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
5025
5026         TPACPI_ACPIHANDLE_INIT(led);
5027
5028         if (!led_handle)
5029                 /* led not supported on R30, R31 */
5030                 led_supported = TPACPI_LED_NONE;
5031         else if (strlencmp(led_path, "SLED") == 0)
5032                 /* 570 */
5033                 led_supported = TPACPI_LED_570;
5034         else if (strlencmp(led_path, "SYSL") == 0)
5035                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
5036                 led_supported = TPACPI_LED_OLD;
5037         else
5038                 /* all others */
5039                 led_supported = TPACPI_LED_NEW;
5040
5041         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
5042                 str_supported(led_supported), led_supported);
5043
5044         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
5045                               GFP_KERNEL);
5046         if (!tpacpi_leds) {
5047                 printk(TPACPI_ERR "Out of memory for LED data\n");
5048                 return -ENOMEM;
5049         }
5050
5051         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
5052                 if (!tpacpi_is_led_restricted(i)) {
5053                         rc = tpacpi_init_led(i);
5054                         if (rc < 0) {
5055                                 led_exit();
5056                                 return rc;
5057                         }
5058                 }
5059         }
5060
5061 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
5062         if (led_supported != TPACPI_LED_NONE)
5063                 printk(TPACPI_NOTICE
5064                         "warning: userspace override of important "
5065                         "firmware LEDs is enabled\n");
5066 #endif
5067         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
5068 }
5069
5070 #define str_led_status(s) \
5071         ((s) == TPACPI_LED_OFF ? "off" : \
5072                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
5073
5074 static int led_read(char *p)
5075 {
5076         int len = 0;
5077
5078         if (!led_supported) {
5079                 len += sprintf(p + len, "status:\t\tnot supported\n");
5080                 return len;
5081         }
5082         len += sprintf(p + len, "status:\t\tsupported\n");
5083
5084         if (led_supported == TPACPI_LED_570) {
5085                 /* 570 */
5086                 int i, status;
5087                 for (i = 0; i < 8; i++) {
5088                         status = led_get_status(i);
5089                         if (status < 0)
5090                                 return -EIO;
5091                         len += sprintf(p + len, "%d:\t\t%s\n",
5092                                        i, str_led_status(status));
5093                 }
5094         }
5095
5096         len += sprintf(p + len, "commands:\t"
5097                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
5098
5099         return len;
5100 }
5101
5102 static int led_write(char *buf)
5103 {
5104         char *cmd;
5105         int led, rc;
5106         enum led_status_t s;
5107
5108         if (!led_supported)
5109                 return -ENODEV;
5110
5111         while ((cmd = next_cmd(&buf))) {
5112                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
5113                         return -EINVAL;
5114
5115                 if (strstr(cmd, "off")) {
5116                         s = TPACPI_LED_OFF;
5117                 } else if (strstr(cmd, "on")) {
5118                         s = TPACPI_LED_ON;
5119                 } else if (strstr(cmd, "blink")) {
5120                         s = TPACPI_LED_BLINK;
5121                 } else {
5122                         return -EINVAL;
5123                 }
5124
5125                 rc = led_set_status(led, s);
5126                 if (rc < 0)
5127                         return rc;
5128         }
5129
5130         return 0;
5131 }
5132
5133 static struct ibm_struct led_driver_data = {
5134         .name = "led",
5135         .read = led_read,
5136         .write = led_write,
5137         .exit = led_exit,
5138 };
5139
5140 /*************************************************************************
5141  * Beep subdriver
5142  */
5143
5144 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
5145
5146 #define TPACPI_BEEP_Q1 0x0001
5147
5148 static const struct tpacpi_quirk beep_quirk_table[] __initconst = {
5149         TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */
5150         TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */
5151 };
5152
5153 static int __init beep_init(struct ibm_init_struct *iibm)
5154 {
5155         unsigned long quirks;
5156
5157         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
5158
5159         TPACPI_ACPIHANDLE_INIT(beep);
5160
5161         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
5162                 str_supported(beep_handle != NULL));
5163
5164         quirks = tpacpi_check_quirks(beep_quirk_table,
5165                                      ARRAY_SIZE(beep_quirk_table));
5166
5167         tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1);
5168
5169         return (beep_handle)? 0 : 1;
5170 }
5171
5172 static int beep_read(char *p)
5173 {
5174         int len = 0;
5175
5176         if (!beep_handle)
5177                 len += sprintf(p + len, "status:\t\tnot supported\n");
5178         else {
5179                 len += sprintf(p + len, "status:\t\tsupported\n");
5180                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
5181         }
5182
5183         return len;
5184 }
5185
5186 static int beep_write(char *buf)
5187 {
5188         char *cmd;
5189         int beep_cmd;
5190
5191         if (!beep_handle)
5192                 return -ENODEV;
5193
5194         while ((cmd = next_cmd(&buf))) {
5195                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5196                     beep_cmd >= 0 && beep_cmd <= 17) {
5197                         /* beep_cmd set */
5198                 } else
5199                         return -EINVAL;
5200                 if (tp_features.beep_needs_two_args) {
5201                         if (!acpi_evalf(beep_handle, NULL, NULL, "vdd",
5202                                         beep_cmd, 0))
5203                                 return -EIO;
5204                 } else {
5205                         if (!acpi_evalf(beep_handle, NULL, NULL, "vd",
5206                                         beep_cmd))
5207                                 return -EIO;
5208                 }
5209         }
5210
5211         return 0;
5212 }
5213
5214 static struct ibm_struct beep_driver_data = {
5215         .name = "beep",
5216         .read = beep_read,
5217         .write = beep_write,
5218 };
5219
5220 /*************************************************************************
5221  * Thermal subdriver
5222  */
5223
5224 enum thermal_access_mode {
5225         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5226         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5227         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5228         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5229         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5230 };
5231
5232 enum { /* TPACPI_THERMAL_TPEC_* */
5233         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5234         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5235         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5236 };
5237
5238 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5239 struct ibm_thermal_sensors_struct {
5240         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5241 };
5242
5243 static enum thermal_access_mode thermal_read_mode;
5244
5245 /* idx is zero-based */
5246 static int thermal_get_sensor(int idx, s32 *value)
5247 {
5248         int t;
5249         s8 tmp;
5250         char tmpi[5];
5251
5252         t = TP_EC_THERMAL_TMP0;
5253
5254         switch (thermal_read_mode) {
5255 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5256         case TPACPI_THERMAL_TPEC_16:
5257                 if (idx >= 8 && idx <= 15) {
5258                         t = TP_EC_THERMAL_TMP8;
5259                         idx -= 8;
5260                 }
5261                 /* fallthrough */
5262 #endif
5263         case TPACPI_THERMAL_TPEC_8:
5264                 if (idx <= 7) {
5265                         if (!acpi_ec_read(t + idx, &tmp))
5266                                 return -EIO;
5267                         *value = tmp * 1000;
5268                         return 0;
5269                 }
5270                 break;
5271
5272         case TPACPI_THERMAL_ACPI_UPDT:
5273                 if (idx <= 7) {
5274                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5275                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5276                                 return -EIO;
5277                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5278                                 return -EIO;
5279                         *value = (t - 2732) * 100;
5280                         return 0;
5281                 }
5282                 break;
5283
5284         case TPACPI_THERMAL_ACPI_TMP07:
5285                 if (idx <= 7) {
5286                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5287                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5288                                 return -EIO;
5289                         if (t > 127 || t < -127)
5290                                 t = TP_EC_THERMAL_TMP_NA;
5291                         *value = t * 1000;
5292                         return 0;
5293                 }
5294                 break;
5295
5296         case TPACPI_THERMAL_NONE:
5297         default:
5298                 return -ENOSYS;
5299         }
5300
5301         return -EINVAL;
5302 }
5303
5304 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5305 {
5306         int res, i;
5307         int n;
5308
5309         n = 8;
5310         i = 0;
5311
5312         if (!s)
5313                 return -EINVAL;
5314
5315         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5316                 n = 16;
5317
5318         for (i = 0 ; i < n; i++) {
5319                 res = thermal_get_sensor(i, &s->temp[i]);
5320                 if (res)
5321                         return res;
5322         }
5323
5324         return n;
5325 }
5326
5327 /* sysfs temp##_input -------------------------------------------------- */
5328
5329 static ssize_t thermal_temp_input_show(struct device *dev,
5330                            struct device_attribute *attr,
5331                            char *buf)
5332 {
5333         struct sensor_device_attribute *sensor_attr =
5334                                         to_sensor_dev_attr(attr);
5335         int idx = sensor_attr->index;
5336         s32 value;
5337         int res;
5338
5339         res = thermal_get_sensor(idx, &value);
5340         if (res)
5341                 return res;
5342         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5343                 return -ENXIO;
5344
5345         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5346 }
5347
5348 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5349          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5350                      thermal_temp_input_show, NULL, _idxB)
5351
5352 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5353         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5354         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5355         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5356         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5357         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5358         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5359         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5360         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5361         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5362         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5363         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5364         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5365         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5366         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5367         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5368         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5369 };
5370
5371 #define THERMAL_ATTRS(X) \
5372         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5373
5374 static struct attribute *thermal_temp_input_attr[] = {
5375         THERMAL_ATTRS(8),
5376         THERMAL_ATTRS(9),
5377         THERMAL_ATTRS(10),
5378         THERMAL_ATTRS(11),
5379         THERMAL_ATTRS(12),
5380         THERMAL_ATTRS(13),
5381         THERMAL_ATTRS(14),
5382         THERMAL_ATTRS(15),
5383         THERMAL_ATTRS(0),
5384         THERMAL_ATTRS(1),
5385         THERMAL_ATTRS(2),
5386         THERMAL_ATTRS(3),
5387         THERMAL_ATTRS(4),
5388         THERMAL_ATTRS(5),
5389         THERMAL_ATTRS(6),
5390         THERMAL_ATTRS(7),
5391         NULL
5392 };
5393
5394 static const struct attribute_group thermal_temp_input16_group = {
5395         .attrs = thermal_temp_input_attr
5396 };
5397
5398 static const struct attribute_group thermal_temp_input8_group = {
5399         .attrs = &thermal_temp_input_attr[8]
5400 };
5401
5402 #undef THERMAL_SENSOR_ATTR_TEMP
5403 #undef THERMAL_ATTRS
5404
5405 /* --------------------------------------------------------------------- */
5406
5407 static int __init thermal_init(struct ibm_init_struct *iibm)
5408 {
5409         u8 t, ta1, ta2;
5410         int i;
5411         int acpi_tmp7;
5412         int res;
5413
5414         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5415
5416         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5417
5418         if (thinkpad_id.ec_model) {
5419                 /*
5420                  * Direct EC access mode: sensors at registers
5421                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5422                  * non-implemented, thermal sensors return 0x80 when
5423                  * not available
5424                  */
5425
5426                 ta1 = ta2 = 0;
5427                 for (i = 0; i < 8; i++) {
5428                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5429                                 ta1 |= t;
5430                         } else {
5431                                 ta1 = 0;
5432                                 break;
5433                         }
5434                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5435                                 ta2 |= t;
5436                         } else {
5437                                 ta1 = 0;
5438                                 break;
5439                         }
5440                 }
5441                 if (ta1 == 0) {
5442                         /* This is sheer paranoia, but we handle it anyway */
5443                         if (acpi_tmp7) {
5444                                 printk(TPACPI_ERR
5445                                        "ThinkPad ACPI EC access misbehaving, "
5446                                        "falling back to ACPI TMPx access "
5447                                        "mode\n");
5448                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5449                         } else {
5450                                 printk(TPACPI_ERR
5451                                        "ThinkPad ACPI EC access misbehaving, "
5452                                        "disabling thermal sensors access\n");
5453                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5454                         }
5455                 } else {
5456                         thermal_read_mode =
5457                             (ta2 != 0) ?
5458                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5459                 }
5460         } else if (acpi_tmp7) {
5461                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5462                         /* 600e/x, 770e, 770x */
5463                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5464                 } else {
5465                         /* Standard ACPI TMPx access, max 8 sensors */
5466                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5467                 }
5468         } else {
5469                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5470                 thermal_read_mode = TPACPI_THERMAL_NONE;
5471         }
5472
5473         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5474                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5475                 thermal_read_mode);
5476
5477         switch (thermal_read_mode) {
5478         case TPACPI_THERMAL_TPEC_16:
5479                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5480                                 &thermal_temp_input16_group);
5481                 if (res)
5482                         return res;
5483                 break;
5484         case TPACPI_THERMAL_TPEC_8:
5485         case TPACPI_THERMAL_ACPI_TMP07:
5486         case TPACPI_THERMAL_ACPI_UPDT:
5487                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5488                                 &thermal_temp_input8_group);
5489                 if (res)
5490                         return res;
5491                 break;
5492         case TPACPI_THERMAL_NONE:
5493         default:
5494                 return 1;
5495         }
5496
5497         return 0;
5498 }
5499
5500 static void thermal_exit(void)
5501 {
5502         switch (thermal_read_mode) {
5503         case TPACPI_THERMAL_TPEC_16:
5504                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5505                                    &thermal_temp_input16_group);
5506                 break;
5507         case TPACPI_THERMAL_TPEC_8:
5508         case TPACPI_THERMAL_ACPI_TMP07:
5509         case TPACPI_THERMAL_ACPI_UPDT:
5510                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5511                                    &thermal_temp_input16_group);
5512                 break;
5513         case TPACPI_THERMAL_NONE:
5514         default:
5515                 break;
5516         }
5517 }
5518
5519 static int thermal_read(char *p)
5520 {
5521         int len = 0;
5522         int n, i;
5523         struct ibm_thermal_sensors_struct t;
5524
5525         n = thermal_get_sensors(&t);
5526         if (unlikely(n < 0))
5527                 return n;
5528
5529         len += sprintf(p + len, "temperatures:\t");
5530
5531         if (n > 0) {
5532                 for (i = 0; i < (n - 1); i++)
5533                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5534                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5535         } else
5536                 len += sprintf(p + len, "not supported\n");
5537
5538         return len;
5539 }
5540
5541 static struct ibm_struct thermal_driver_data = {
5542         .name = "thermal",
5543         .read = thermal_read,
5544         .exit = thermal_exit,
5545 };
5546
5547 /*************************************************************************
5548  * EC Dump subdriver
5549  */
5550
5551 static u8 ecdump_regs[256];
5552
5553 static int ecdump_read(char *p)
5554 {
5555         int len = 0;
5556         int i, j;
5557         u8 v;
5558
5559         len += sprintf(p + len, "EC      "
5560                        " +00 +01 +02 +03 +04 +05 +06 +07"
5561                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5562         for (i = 0; i < 256; i += 16) {
5563                 len += sprintf(p + len, "EC 0x%02x:", i);
5564                 for (j = 0; j < 16; j++) {
5565                         if (!acpi_ec_read(i + j, &v))
5566                                 break;
5567                         if (v != ecdump_regs[i + j])
5568                                 len += sprintf(p + len, " *%02x", v);
5569                         else
5570                                 len += sprintf(p + len, "  %02x", v);
5571                         ecdump_regs[i + j] = v;
5572                 }
5573                 len += sprintf(p + len, "\n");
5574                 if (j != 16)
5575                         break;
5576         }
5577
5578         /* These are way too dangerous to advertise openly... */
5579 #if 0
5580         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5581                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5582         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5583                        " (<offset> is 00-ff, <value> is 0-255)\n");
5584 #endif
5585         return len;
5586 }
5587
5588 static int ecdump_write(char *buf)
5589 {
5590         char *cmd;
5591         int i, v;
5592
5593         while ((cmd = next_cmd(&buf))) {
5594                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5595                         /* i and v set */
5596                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5597                         /* i and v set */
5598                 } else
5599                         return -EINVAL;
5600                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5601                         if (!acpi_ec_write(i, v))
5602                                 return -EIO;
5603                 } else
5604                         return -EINVAL;
5605         }
5606
5607         return 0;
5608 }
5609
5610 static struct ibm_struct ecdump_driver_data = {
5611         .name = "ecdump",
5612         .read = ecdump_read,
5613         .write = ecdump_write,
5614         .flags.experimental = 1,
5615 };
5616
5617 /*************************************************************************
5618  * Backlight/brightness subdriver
5619  */
5620
5621 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5622
5623 /*
5624  * ThinkPads can read brightness from two places: EC HBRV (0x31), or
5625  * CMOS NVRAM byte 0x5E, bits 0-3.
5626  *
5627  * EC HBRV (0x31) has the following layout
5628  *   Bit 7: unknown function
5629  *   Bit 6: unknown function
5630  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5631  *   Bit 4: must be set to zero to avoid problems
5632  *   Bit 3-0: backlight brightness level
5633  *
5634  * brightness_get_raw returns status data in the HBRV layout
5635  */
5636
5637 enum {
5638         TP_EC_BACKLIGHT = 0x31,
5639
5640         /* TP_EC_BACKLIGHT bitmasks */
5641         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5642         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5643         TP_EC_BACKLIGHT_MAPSW = 0x20,
5644 };
5645
5646 enum tpacpi_brightness_access_mode {
5647         TPACPI_BRGHT_MODE_AUTO = 0,     /* Not implemented yet */
5648         TPACPI_BRGHT_MODE_EC,           /* EC control */
5649         TPACPI_BRGHT_MODE_UCMS_STEP,    /* UCMS step-based control */
5650         TPACPI_BRGHT_MODE_ECNVRAM,      /* EC control w/ NVRAM store */
5651         TPACPI_BRGHT_MODE_MAX
5652 };
5653
5654 static struct backlight_device *ibm_backlight_device;
5655
5656 static enum tpacpi_brightness_access_mode brightness_mode =
5657                 TPACPI_BRGHT_MODE_MAX;
5658
5659 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5660
5661 static struct mutex brightness_mutex;
5662
5663 /* NVRAM brightness access,
5664  * call with brightness_mutex held! */
5665 static unsigned int tpacpi_brightness_nvram_get(void)
5666 {
5667         u8 lnvram;
5668
5669         lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5670                   & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5671                   >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5672         lnvram &= (tp_features.bright_16levels) ? 0x0f : 0x07;
5673
5674         return lnvram;
5675 }
5676
5677 static void tpacpi_brightness_checkpoint_nvram(void)
5678 {
5679         u8 lec = 0;
5680         u8 b_nvram;
5681
5682         if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM)
5683                 return;
5684
5685         vdbg_printk(TPACPI_DBG_BRGHT,
5686                 "trying to checkpoint backlight level to NVRAM...\n");
5687
5688         if (mutex_lock_killable(&brightness_mutex) < 0)
5689                 return;
5690
5691         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5692                 goto unlock;
5693         lec &= TP_EC_BACKLIGHT_LVLMSK;
5694         b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
5695
5696         if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5697                              >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) {
5698                 /* NVRAM needs update */
5699                 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS <<
5700                                 TP_NVRAM_POS_LEVEL_BRIGHTNESS);
5701                 b_nvram |= lec;
5702                 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS);
5703                 dbg_printk(TPACPI_DBG_BRGHT,
5704                            "updated NVRAM backlight level to %u (0x%02x)\n",
5705                            (unsigned int) lec, (unsigned int) b_nvram);
5706         } else
5707                 vdbg_printk(TPACPI_DBG_BRGHT,
5708                            "NVRAM backlight level already is %u (0x%02x)\n",
5709                            (unsigned int) lec, (unsigned int) b_nvram);
5710
5711 unlock:
5712         mutex_unlock(&brightness_mutex);
5713 }
5714
5715
5716 /* call with brightness_mutex held! */
5717 static int tpacpi_brightness_get_raw(int *status)
5718 {
5719         u8 lec = 0;
5720
5721         switch (brightness_mode) {
5722         case TPACPI_BRGHT_MODE_UCMS_STEP:
5723                 *status = tpacpi_brightness_nvram_get();
5724                 return 0;
5725         case TPACPI_BRGHT_MODE_EC:
5726         case TPACPI_BRGHT_MODE_ECNVRAM:
5727                 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5728                         return -EIO;
5729                 *status = lec;
5730                 return 0;
5731         default:
5732                 return -ENXIO;
5733         }
5734 }
5735
5736 /* call with brightness_mutex held! */
5737 /* do NOT call with illegal backlight level value */
5738 static int tpacpi_brightness_set_ec(unsigned int value)
5739 {
5740         u8 lec = 0;
5741
5742         if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec)))
5743                 return -EIO;
5744
5745         if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT,
5746                                 (lec & TP_EC_BACKLIGHT_CMDMSK) |
5747                                 (value & TP_EC_BACKLIGHT_LVLMSK))))
5748                 return -EIO;
5749
5750         return 0;
5751 }
5752
5753 /* call with brightness_mutex held! */
5754 static int tpacpi_brightness_set_ucmsstep(unsigned int value)
5755 {
5756         int cmos_cmd, inc;
5757         unsigned int current_value, i;
5758
5759         current_value = tpacpi_brightness_nvram_get();
5760
5761         if (value == current_value)
5762                 return 0;
5763
5764         cmos_cmd = (value > current_value) ?
5765                         TP_CMOS_BRIGHTNESS_UP :
5766                         TP_CMOS_BRIGHTNESS_DOWN;
5767         inc = (value > current_value) ? 1 : -1;
5768
5769         for (i = current_value; i != value; i += inc)
5770                 if (issue_thinkpad_cmos_command(cmos_cmd))
5771                         return -EIO;
5772
5773         return 0;
5774 }
5775
5776 /* May return EINTR which can always be mapped to ERESTARTSYS */
5777 static int brightness_set(unsigned int value)
5778 {
5779         int res;
5780
5781         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5782             value < 0)
5783                 return -EINVAL;
5784
5785         vdbg_printk(TPACPI_DBG_BRGHT,
5786                         "set backlight level to %d\n", value);
5787
5788         res = mutex_lock_killable(&brightness_mutex);
5789         if (res < 0)
5790                 return res;
5791
5792         switch (brightness_mode) {
5793         case TPACPI_BRGHT_MODE_EC:
5794         case TPACPI_BRGHT_MODE_ECNVRAM:
5795                 res = tpacpi_brightness_set_ec(value);
5796                 break;
5797         case TPACPI_BRGHT_MODE_UCMS_STEP:
5798                 res = tpacpi_brightness_set_ucmsstep(value);
5799                 break;
5800         default:
5801                 res = -ENXIO;
5802         }
5803
5804         mutex_unlock(&brightness_mutex);
5805         return res;
5806 }
5807
5808 /* sysfs backlight class ----------------------------------------------- */
5809
5810 static int brightness_update_status(struct backlight_device *bd)
5811 {
5812         unsigned int level =
5813                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5814                  bd->props.power == FB_BLANK_UNBLANK) ?
5815                                 bd->props.brightness : 0;
5816
5817         dbg_printk(TPACPI_DBG_BRGHT,
5818                         "backlight: attempt to set level to %d\n",
5819                         level);
5820
5821         /* it is the backlight class's job (caller) to handle
5822          * EINTR and other errors properly */
5823         return brightness_set(level);
5824 }
5825
5826 static int brightness_get(struct backlight_device *bd)
5827 {
5828         int status, res;
5829
5830         res = mutex_lock_killable(&brightness_mutex);
5831         if (res < 0)
5832                 return 0;
5833
5834         res = tpacpi_brightness_get_raw(&status);
5835
5836         mutex_unlock(&brightness_mutex);
5837
5838         if (res < 0)
5839                 return 0;
5840
5841         return status & TP_EC_BACKLIGHT_LVLMSK;
5842 }
5843
5844 static struct backlight_ops ibm_backlight_data = {
5845         .get_brightness = brightness_get,
5846         .update_status  = brightness_update_status,
5847 };
5848
5849 /* --------------------------------------------------------------------- */
5850
5851 static int __init brightness_init(struct ibm_init_struct *iibm)
5852 {
5853         int b;
5854
5855         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5856
5857         mutex_init(&brightness_mutex);
5858
5859         /*
5860          * We always attempt to detect acpi support, so as to switch
5861          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5862          * going to publish a backlight interface
5863          */
5864         b = tpacpi_check_std_acpi_brightness_support();
5865         if (b > 0) {
5866
5867                 if (acpi_video_backlight_support()) {
5868                         if (brightness_enable > 1) {
5869                                 printk(TPACPI_NOTICE
5870                                        "Standard ACPI backlight interface "
5871                                        "available, not loading native one.\n");
5872                                 return 1;
5873                         } else if (brightness_enable == 1) {
5874                                 printk(TPACPI_NOTICE
5875                                        "Backlight control force enabled, even if standard "
5876                                        "ACPI backlight interface is available\n");
5877                         }
5878                 } else {
5879                         if (brightness_enable > 1) {
5880                                 printk(TPACPI_NOTICE
5881                                        "Standard ACPI backlight interface not "
5882                                        "available, thinkpad_acpi native "
5883                                        "brightness control enabled\n");
5884                         }
5885                 }
5886         }
5887
5888         if (!brightness_enable) {
5889                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5890                            "brightness support disabled by "
5891                            "module parameter\n");
5892                 return 1;
5893         }
5894
5895         if (b > 16) {
5896                 printk(TPACPI_ERR
5897                        "Unsupported brightness interface, "
5898                        "please contact %s\n", TPACPI_MAIL);
5899                 return 1;
5900         }
5901         if (b == 16)
5902                 tp_features.bright_16levels = 1;
5903
5904         /*
5905          * Check for module parameter bogosity, note that we
5906          * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be
5907          * able to detect "unspecified"
5908          */
5909         if (brightness_mode > TPACPI_BRGHT_MODE_MAX)
5910                 return -EINVAL;
5911
5912         /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */
5913         if (brightness_mode == TPACPI_BRGHT_MODE_AUTO ||
5914             brightness_mode == TPACPI_BRGHT_MODE_MAX) {
5915                 if (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) {
5916                         /*
5917                          * IBM models that define HBRV probably have
5918                          * EC-based backlight level control
5919                          */
5920                         if (acpi_evalf(ec_handle, NULL, "HBRV", "qd"))
5921                                 /* T40-T43, R50-R52, R50e, R51e, X31-X41 */
5922                                 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM;
5923                         else
5924                                 /* all other IBM ThinkPads */
5925                                 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5926                 } else
5927                         /* All Lenovo ThinkPads */
5928                         brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP;
5929
5930                 dbg_printk(TPACPI_DBG_BRGHT,
5931                            "selected brightness_mode=%d\n",
5932                            brightness_mode);
5933         }
5934
5935         if (tpacpi_brightness_get_raw(&b) < 0)
5936                 return 1;
5937
5938         if (tp_features.bright_16levels)
5939                 printk(TPACPI_INFO
5940                        "detected a 16-level brightness capable ThinkPad\n");
5941
5942         ibm_backlight_device = backlight_device_register(
5943                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5944                                         &ibm_backlight_data);
5945         if (IS_ERR(ibm_backlight_device)) {
5946                 printk(TPACPI_ERR "Could not register backlight device\n");
5947                 return PTR_ERR(ibm_backlight_device);
5948         }
5949         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
5950                         "brightness is supported\n");
5951
5952         ibm_backlight_device->props.max_brightness =
5953                                 (tp_features.bright_16levels)? 15 : 7;
5954         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5955         backlight_update_status(ibm_backlight_device);
5956
5957         return 0;
5958 }
5959
5960 static void brightness_suspend(pm_message_t state)
5961 {
5962         tpacpi_brightness_checkpoint_nvram();
5963 }
5964
5965 static void brightness_shutdown(void)
5966 {
5967         tpacpi_brightness_checkpoint_nvram();
5968 }
5969
5970 static void brightness_exit(void)
5971 {
5972         if (ibm_backlight_device) {
5973                 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT,
5974                             "calling backlight_device_unregister()\n");
5975                 backlight_device_unregister(ibm_backlight_device);
5976         }
5977
5978         tpacpi_brightness_checkpoint_nvram();
5979 }
5980
5981 static int brightness_read(char *p)
5982 {
5983         int len = 0;
5984         int level;
5985
5986         level = brightness_get(NULL);
5987         if (level < 0) {
5988                 len += sprintf(p + len, "level:\t\tunreadable\n");
5989         } else {
5990                 len += sprintf(p + len, "level:\t\t%d\n", level);
5991                 len += sprintf(p + len, "commands:\tup, down\n");
5992                 len += sprintf(p + len, "commands:\tlevel <level>"
5993                                " (<level> is 0-%d)\n",
5994                                (tp_features.bright_16levels) ? 15 : 7);
5995         }
5996
5997         return len;
5998 }
5999
6000 static int brightness_write(char *buf)
6001 {
6002         int level;
6003         int rc;
6004         char *cmd;
6005         int max_level = (tp_features.bright_16levels) ? 15 : 7;
6006
6007         level = brightness_get(NULL);
6008         if (level < 0)
6009                 return level;
6010
6011         while ((cmd = next_cmd(&buf))) {
6012                 if (strlencmp(cmd, "up") == 0) {
6013                         if (level < max_level)
6014                                 level++;
6015                 } else if (strlencmp(cmd, "down") == 0) {
6016                         if (level > 0)
6017                                 level--;
6018                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
6019                            level >= 0 && level <= max_level) {
6020                         /* new level set */
6021                 } else
6022                         return -EINVAL;
6023         }
6024
6025         tpacpi_disclose_usertask("procfs brightness",
6026                         "set level to %d\n", level);
6027
6028         /*
6029          * Now we know what the final level should be, so we try to set it.
6030          * Doing it this way makes the syscall restartable in case of EINTR
6031          */
6032         rc = brightness_set(level);
6033         return (rc == -EINTR)? ERESTARTSYS : rc;
6034 }
6035
6036 static struct ibm_struct brightness_driver_data = {
6037         .name = "brightness",
6038         .read = brightness_read,
6039         .write = brightness_write,
6040         .exit = brightness_exit,
6041         .suspend = brightness_suspend,
6042         .shutdown = brightness_shutdown,
6043 };
6044
6045 /*************************************************************************
6046  * Volume subdriver
6047  */
6048
6049 static int volume_offset = 0x30;
6050
6051 static int volume_read(char *p)
6052 {
6053         int len = 0;
6054         u8 level;
6055
6056         if (!acpi_ec_read(volume_offset, &level)) {
6057                 len += sprintf(p + len, "level:\t\tunreadable\n");
6058         } else {
6059                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
6060                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
6061                 len += sprintf(p + len, "commands:\tup, down, mute\n");
6062                 len += sprintf(p + len, "commands:\tlevel <level>"
6063                                " (<level> is 0-15)\n");
6064         }
6065
6066         return len;
6067 }
6068
6069 static int volume_write(char *buf)
6070 {
6071         int cmos_cmd, inc, i;
6072         u8 level, mute;
6073         int new_level, new_mute;
6074         char *cmd;
6075
6076         while ((cmd = next_cmd(&buf))) {
6077                 if (!acpi_ec_read(volume_offset, &level))
6078                         return -EIO;
6079                 new_mute = mute = level & 0x40;
6080                 new_level = level = level & 0xf;
6081
6082                 if (strlencmp(cmd, "up") == 0) {
6083                         if (mute)
6084                                 new_mute = 0;
6085                         else
6086                                 new_level = level == 15 ? 15 : level + 1;
6087                 } else if (strlencmp(cmd, "down") == 0) {
6088                         if (mute)
6089                                 new_mute = 0;
6090                         else
6091                                 new_level = level == 0 ? 0 : level - 1;
6092                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
6093                            new_level >= 0 && new_level <= 15) {
6094                         /* new_level set */
6095                 } else if (strlencmp(cmd, "mute") == 0) {
6096                         new_mute = 0x40;
6097                 } else
6098                         return -EINVAL;
6099
6100                 if (new_level != level) {
6101                         /* mute doesn't change */
6102
6103                         cmos_cmd = (new_level > level) ?
6104                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
6105                         inc = new_level > level ? 1 : -1;
6106
6107                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
6108                                      !acpi_ec_write(volume_offset, level)))
6109                                 return -EIO;
6110
6111                         for (i = level; i != new_level; i += inc)
6112                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
6113                                     !acpi_ec_write(volume_offset, i + inc))
6114                                         return -EIO;
6115
6116                         if (mute &&
6117                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
6118                              !acpi_ec_write(volume_offset, new_level + mute))) {
6119                                 return -EIO;
6120                         }
6121                 }
6122
6123                 if (new_mute != mute) {
6124                         /* level doesn't change */
6125
6126                         cmos_cmd = (new_mute) ?
6127                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
6128
6129                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
6130                             !acpi_ec_write(volume_offset, level + new_mute))
6131                                 return -EIO;
6132                 }
6133         }
6134
6135         return 0;
6136 }
6137
6138 static struct ibm_struct volume_driver_data = {
6139         .name = "volume",
6140         .read = volume_read,
6141         .write = volume_write,
6142 };
6143
6144 /*************************************************************************
6145  * Fan subdriver
6146  */
6147
6148 /*
6149  * FAN ACCESS MODES
6150  *
6151  * TPACPI_FAN_RD_ACPI_GFAN:
6152  *      ACPI GFAN method: returns fan level
6153  *
6154  *      see TPACPI_FAN_WR_ACPI_SFAN
6155  *      EC 0x2f (HFSP) not available if GFAN exists
6156  *
6157  * TPACPI_FAN_WR_ACPI_SFAN:
6158  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
6159  *
6160  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
6161  *      it for writing.
6162  *
6163  * TPACPI_FAN_WR_TPEC:
6164  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
6165  *      Supported on almost all ThinkPads
6166  *
6167  *      Fan speed changes of any sort (including those caused by the
6168  *      disengaged mode) are usually done slowly by the firmware as the
6169  *      maximum ammount of fan duty cycle change per second seems to be
6170  *      limited.
6171  *
6172  *      Reading is not available if GFAN exists.
6173  *      Writing is not available if SFAN exists.
6174  *
6175  *      Bits
6176  *       7      automatic mode engaged;
6177  *              (default operation mode of the ThinkPad)
6178  *              fan level is ignored in this mode.
6179  *       6      full speed mode (takes precedence over bit 7);
6180  *              not available on all thinkpads.  May disable
6181  *              the tachometer while the fan controller ramps up
6182  *              the speed (which can take up to a few *minutes*).
6183  *              Speeds up fan to 100% duty-cycle, which is far above
6184  *              the standard RPM levels.  It is not impossible that
6185  *              it could cause hardware damage.
6186  *      5-3     unused in some models.  Extra bits for fan level
6187  *              in others, but still useless as all values above
6188  *              7 map to the same speed as level 7 in these models.
6189  *      2-0     fan level (0..7 usually)
6190  *                      0x00 = stop
6191  *                      0x07 = max (set when temperatures critical)
6192  *              Some ThinkPads may have other levels, see
6193  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
6194  *
6195  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
6196  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
6197  *      does so, its initial value is meaningless (0x07).
6198  *
6199  *      For firmware bugs, refer to:
6200  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6201  *
6202  *      ----
6203  *
6204  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
6205  *      Main fan tachometer reading (in RPM)
6206  *
6207  *      This register is present on all ThinkPads with a new-style EC, and
6208  *      it is known not to be present on the A21m/e, and T22, as there is
6209  *      something else in offset 0x84 according to the ACPI DSDT.  Other
6210  *      ThinkPads from this same time period (and earlier) probably lack the
6211  *      tachometer as well.
6212  *
6213  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firmware
6214  *      was never fixed by IBM to report the EC firmware version string
6215  *      probably support the tachometer (like the early X models), so
6216  *      detecting it is quite hard.  We need more data to know for sure.
6217  *
6218  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
6219  *      might result.
6220  *
6221  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
6222  *      mode.
6223  *
6224  *      For firmware bugs, refer to:
6225  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
6226  *
6227  * TPACPI_FAN_WR_ACPI_FANS:
6228  *      ThinkPad X31, X40, X41.  Not available in the X60.
6229  *
6230  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
6231  *      high speed.  ACPI DSDT seems to map these three speeds to levels
6232  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
6233  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
6234  *
6235  *      The speeds are stored on handles
6236  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
6237  *
6238  *      There are three default speed sets, acessible as handles:
6239  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
6240  *
6241  *      ACPI DSDT switches which set is in use depending on various
6242  *      factors.
6243  *
6244  *      TPACPI_FAN_WR_TPEC is also available and should be used to
6245  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
6246  *      but the ACPI tables just mention level 7.
6247  */
6248
6249 enum {                                  /* Fan control constants */
6250         fan_status_offset = 0x2f,       /* EC register 0x2f */
6251         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
6252                                          * 0x84 must be read before 0x85 */
6253
6254         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
6255         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
6256
6257         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
6258 };
6259
6260 enum fan_status_access_mode {
6261         TPACPI_FAN_NONE = 0,            /* No fan status or control */
6262         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
6263         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
6264 };
6265
6266 enum fan_control_access_mode {
6267         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
6268         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
6269         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
6270         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
6271 };
6272
6273 enum fan_control_commands {
6274         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
6275         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
6276         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
6277                                                  * and also watchdog cmd */
6278 };
6279
6280 static int fan_control_allowed;
6281
6282 static enum fan_status_access_mode fan_status_access_mode;
6283 static enum fan_control_access_mode fan_control_access_mode;
6284 static enum fan_control_commands fan_control_commands;
6285
6286 static u8 fan_control_initial_status;
6287 static u8 fan_control_desired_level;
6288 static u8 fan_control_resume_level;
6289 static int fan_watchdog_maxinterval;
6290
6291 static struct mutex fan_mutex;
6292
6293 static void fan_watchdog_fire(struct work_struct *ignored);
6294 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
6295
6296 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
6297 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
6298            "\\FSPD",            /* 600e/x, 770e, 770x */
6299            );                   /* all others */
6300 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
6301            "JFNS",              /* 770x-JL */
6302            );                   /* all others */
6303
6304 /*
6305  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
6306  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
6307  * be in auto mode (0x80).
6308  *
6309  * This is corrected by any write to HFSP either by the driver, or
6310  * by the firmware.
6311  *
6312  * We assume 0x07 really means auto mode while this quirk is active,
6313  * as this is far more likely than the ThinkPad being in level 7,
6314  * which is only used by the firmware during thermal emergencies.
6315  *
6316  * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52),
6317  * TP-70 (T43, R52), which are known to be buggy.
6318  */
6319
6320 static void fan_quirk1_setup(void)
6321 {
6322         if (fan_control_initial_status == 0x07) {
6323                 printk(TPACPI_NOTICE
6324                        "fan_init: initial fan status is unknown, "
6325                        "assuming it is in auto mode\n");
6326                 tp_features.fan_ctrl_status_undef = 1;
6327         }
6328 }
6329
6330 static void fan_quirk1_handle(u8 *fan_status)
6331 {
6332         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6333                 if (*fan_status != fan_control_initial_status) {
6334                         /* something changed the HFSP regisnter since
6335                          * driver init time, so it is not undefined
6336                          * anymore */
6337                         tp_features.fan_ctrl_status_undef = 0;
6338                 } else {
6339                         /* Return most likely status. In fact, it
6340                          * might be the only possible status */
6341                         *fan_status = TP_EC_FAN_AUTO;
6342                 }
6343         }
6344 }
6345
6346 /*
6347  * Call with fan_mutex held
6348  */
6349 static void fan_update_desired_level(u8 status)
6350 {
6351         if ((status &
6352              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6353                 if (status > 7)
6354                         fan_control_desired_level = 7;
6355                 else
6356                         fan_control_desired_level = status;
6357         }
6358 }
6359
6360 static int fan_get_status(u8 *status)
6361 {
6362         u8 s;
6363
6364         /* TODO:
6365          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6366
6367         switch (fan_status_access_mode) {
6368         case TPACPI_FAN_RD_ACPI_GFAN:
6369                 /* 570, 600e/x, 770e, 770x */
6370
6371                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6372                         return -EIO;
6373
6374                 if (likely(status))
6375                         *status = s & 0x07;
6376
6377                 break;
6378
6379         case TPACPI_FAN_RD_TPEC:
6380                 /* all except 570, 600e/x, 770e, 770x */
6381                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6382                         return -EIO;
6383
6384                 if (likely(status)) {
6385                         *status = s;
6386                         fan_quirk1_handle(status);
6387                 }
6388
6389                 break;
6390
6391         default:
6392                 return -ENXIO;
6393         }
6394
6395         return 0;
6396 }
6397
6398 static int fan_get_status_safe(u8 *status)
6399 {
6400         int rc;
6401         u8 s;
6402
6403         if (mutex_lock_killable(&fan_mutex))
6404                 return -ERESTARTSYS;
6405         rc = fan_get_status(&s);
6406         if (!rc)
6407                 fan_update_desired_level(s);
6408         mutex_unlock(&fan_mutex);
6409
6410         if (status)
6411                 *status = s;
6412
6413         return rc;
6414 }
6415
6416 static int fan_get_speed(unsigned int *speed)
6417 {
6418         u8 hi, lo;
6419
6420         switch (fan_status_access_mode) {
6421         case TPACPI_FAN_RD_TPEC:
6422                 /* all except 570, 600e/x, 770e, 770x */
6423                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6424                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6425                         return -EIO;
6426
6427                 if (likely(speed))
6428                         *speed = (hi << 8) | lo;
6429
6430                 break;
6431
6432         default:
6433                 return -ENXIO;
6434         }
6435
6436         return 0;
6437 }
6438
6439 static int fan_set_level(int level)
6440 {
6441         if (!fan_control_allowed)
6442                 return -EPERM;
6443
6444         switch (fan_control_access_mode) {
6445         case TPACPI_FAN_WR_ACPI_SFAN:
6446                 if (level >= 0 && level <= 7) {
6447                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6448                                 return -EIO;
6449                 } else
6450                         return -EINVAL;
6451                 break;
6452
6453         case TPACPI_FAN_WR_ACPI_FANS:
6454         case TPACPI_FAN_WR_TPEC:
6455                 if (!(level & TP_EC_FAN_AUTO) &&
6456                     !(level & TP_EC_FAN_FULLSPEED) &&
6457                     ((level < 0) || (level > 7)))
6458                         return -EINVAL;
6459
6460                 /* safety net should the EC not support AUTO
6461                  * or FULLSPEED mode bits and just ignore them */
6462                 if (level & TP_EC_FAN_FULLSPEED)
6463                         level |= 7;     /* safety min speed 7 */
6464                 else if (level & TP_EC_FAN_AUTO)
6465                         level |= 4;     /* safety min speed 4 */
6466
6467                 if (!acpi_ec_write(fan_status_offset, level))
6468                         return -EIO;
6469                 else
6470                         tp_features.fan_ctrl_status_undef = 0;
6471                 break;
6472
6473         default:
6474                 return -ENXIO;
6475         }
6476
6477         vdbg_printk(TPACPI_DBG_FAN,
6478                 "fan control: set fan control register to 0x%02x\n", level);
6479         return 0;
6480 }
6481
6482 static int fan_set_level_safe(int level)
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         if (level == TPACPI_FAN_LAST_LEVEL)
6493                 level = fan_control_desired_level;
6494
6495         rc = fan_set_level(level);
6496         if (!rc)
6497                 fan_update_desired_level(level);
6498
6499         mutex_unlock(&fan_mutex);
6500         return rc;
6501 }
6502
6503 static int fan_set_enable(void)
6504 {
6505         u8 s;
6506         int rc;
6507
6508         if (!fan_control_allowed)
6509                 return -EPERM;
6510
6511         if (mutex_lock_killable(&fan_mutex))
6512                 return -ERESTARTSYS;
6513
6514         switch (fan_control_access_mode) {
6515         case TPACPI_FAN_WR_ACPI_FANS:
6516         case TPACPI_FAN_WR_TPEC:
6517                 rc = fan_get_status(&s);
6518                 if (rc < 0)
6519                         break;
6520
6521                 /* Don't go out of emergency fan mode */
6522                 if (s != 7) {
6523                         s &= 0x07;
6524                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6525                 }
6526
6527                 if (!acpi_ec_write(fan_status_offset, s))
6528                         rc = -EIO;
6529                 else {
6530                         tp_features.fan_ctrl_status_undef = 0;
6531                         rc = 0;
6532                 }
6533                 break;
6534
6535         case TPACPI_FAN_WR_ACPI_SFAN:
6536                 rc = fan_get_status(&s);
6537                 if (rc < 0)
6538                         break;
6539
6540                 s &= 0x07;
6541
6542                 /* Set fan to at least level 4 */
6543                 s |= 4;
6544
6545                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6546                         rc = -EIO;
6547                 else
6548                         rc = 0;
6549                 break;
6550
6551         default:
6552                 rc = -ENXIO;
6553         }
6554
6555         mutex_unlock(&fan_mutex);
6556
6557         if (!rc)
6558                 vdbg_printk(TPACPI_DBG_FAN,
6559                         "fan control: set fan control register to 0x%02x\n",
6560                         s);
6561         return rc;
6562 }
6563
6564 static int fan_set_disable(void)
6565 {
6566         int rc;
6567
6568         if (!fan_control_allowed)
6569                 return -EPERM;
6570
6571         if (mutex_lock_killable(&fan_mutex))
6572                 return -ERESTARTSYS;
6573
6574         rc = 0;
6575         switch (fan_control_access_mode) {
6576         case TPACPI_FAN_WR_ACPI_FANS:
6577         case TPACPI_FAN_WR_TPEC:
6578                 if (!acpi_ec_write(fan_status_offset, 0x00))
6579                         rc = -EIO;
6580                 else {
6581                         fan_control_desired_level = 0;
6582                         tp_features.fan_ctrl_status_undef = 0;
6583                 }
6584                 break;
6585
6586         case TPACPI_FAN_WR_ACPI_SFAN:
6587                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6588                         rc = -EIO;
6589                 else
6590                         fan_control_desired_level = 0;
6591                 break;
6592
6593         default:
6594                 rc = -ENXIO;
6595         }
6596
6597         if (!rc)
6598                 vdbg_printk(TPACPI_DBG_FAN,
6599                         "fan control: set fan control register to 0\n");
6600
6601         mutex_unlock(&fan_mutex);
6602         return rc;
6603 }
6604
6605 static int fan_set_speed(int speed)
6606 {
6607         int rc;
6608
6609         if (!fan_control_allowed)
6610                 return -EPERM;
6611
6612         if (mutex_lock_killable(&fan_mutex))
6613                 return -ERESTARTSYS;
6614
6615         rc = 0;
6616         switch (fan_control_access_mode) {
6617         case TPACPI_FAN_WR_ACPI_FANS:
6618                 if (speed >= 0 && speed <= 65535) {
6619                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6620                                         speed, speed, speed))
6621                                 rc = -EIO;
6622                 } else
6623                         rc = -EINVAL;
6624                 break;
6625
6626         default:
6627                 rc = -ENXIO;
6628         }
6629
6630         mutex_unlock(&fan_mutex);
6631         return rc;
6632 }
6633
6634 static void fan_watchdog_reset(void)
6635 {
6636         static int fan_watchdog_active;
6637
6638         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6639                 return;
6640
6641         if (fan_watchdog_active)
6642                 cancel_delayed_work(&fan_watchdog_task);
6643
6644         if (fan_watchdog_maxinterval > 0 &&
6645             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6646                 fan_watchdog_active = 1;
6647                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6648                                 msecs_to_jiffies(fan_watchdog_maxinterval
6649                                                  * 1000))) {
6650                         printk(TPACPI_ERR
6651                                "failed to queue the fan watchdog, "
6652                                "watchdog will not trigger\n");
6653                 }
6654         } else
6655                 fan_watchdog_active = 0;
6656 }
6657
6658 static void fan_watchdog_fire(struct work_struct *ignored)
6659 {
6660         int rc;
6661
6662         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6663                 return;
6664
6665         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6666         rc = fan_set_enable();
6667         if (rc < 0) {
6668                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6669                         "will try again later...\n", -rc);
6670                 /* reschedule for later */
6671                 fan_watchdog_reset();
6672         }
6673 }
6674
6675 /*
6676  * SYSFS fan layout: hwmon compatible (device)
6677  *
6678  * pwm*_enable:
6679  *      0: "disengaged" mode
6680  *      1: manual mode
6681  *      2: native EC "auto" mode (recommended, hardware default)
6682  *
6683  * pwm*: set speed in manual mode, ignored otherwise.
6684  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6685  *      interpolation.
6686  *
6687  * fan*_input: tachometer reading, RPM
6688  *
6689  *
6690  * SYSFS fan layout: extensions
6691  *
6692  * fan_watchdog (driver):
6693  *      fan watchdog interval in seconds, 0 disables (default), max 120
6694  */
6695
6696 /* sysfs fan pwm1_enable ----------------------------------------------- */
6697 static ssize_t fan_pwm1_enable_show(struct device *dev,
6698                                     struct device_attribute *attr,
6699                                     char *buf)
6700 {
6701         int res, mode;
6702         u8 status;
6703
6704         res = fan_get_status_safe(&status);
6705         if (res)
6706                 return res;
6707
6708         if (status & TP_EC_FAN_FULLSPEED) {
6709                 mode = 0;
6710         } else if (status & TP_EC_FAN_AUTO) {
6711                 mode = 2;
6712         } else
6713                 mode = 1;
6714
6715         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6716 }
6717
6718 static ssize_t fan_pwm1_enable_store(struct device *dev,
6719                                      struct device_attribute *attr,
6720                                      const char *buf, size_t count)
6721 {
6722         unsigned long t;
6723         int res, level;
6724
6725         if (parse_strtoul(buf, 2, &t))
6726                 return -EINVAL;
6727
6728         tpacpi_disclose_usertask("hwmon pwm1_enable",
6729                         "set fan mode to %lu\n", t);
6730
6731         switch (t) {
6732         case 0:
6733                 level = TP_EC_FAN_FULLSPEED;
6734                 break;
6735         case 1:
6736                 level = TPACPI_FAN_LAST_LEVEL;
6737                 break;
6738         case 2:
6739                 level = TP_EC_FAN_AUTO;
6740                 break;
6741         case 3:
6742                 /* reserved for software-controlled auto mode */
6743                 return -ENOSYS;
6744         default:
6745                 return -EINVAL;
6746         }
6747
6748         res = fan_set_level_safe(level);
6749         if (res == -ENXIO)
6750                 return -EINVAL;
6751         else if (res < 0)
6752                 return res;
6753
6754         fan_watchdog_reset();
6755
6756         return count;
6757 }
6758
6759 static struct device_attribute dev_attr_fan_pwm1_enable =
6760         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6761                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6762
6763 /* sysfs fan pwm1 ------------------------------------------------------ */
6764 static ssize_t fan_pwm1_show(struct device *dev,
6765                              struct device_attribute *attr,
6766                              char *buf)
6767 {
6768         int res;
6769         u8 status;
6770
6771         res = fan_get_status_safe(&status);
6772         if (res)
6773                 return res;
6774
6775         if ((status &
6776              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6777                 status = fan_control_desired_level;
6778
6779         if (status > 7)
6780                 status = 7;
6781
6782         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6783 }
6784
6785 static ssize_t fan_pwm1_store(struct device *dev,
6786                               struct device_attribute *attr,
6787                               const char *buf, size_t count)
6788 {
6789         unsigned long s;
6790         int rc;
6791         u8 status, newlevel;
6792
6793         if (parse_strtoul(buf, 255, &s))
6794                 return -EINVAL;
6795
6796         tpacpi_disclose_usertask("hwmon pwm1",
6797                         "set fan speed to %lu\n", s);
6798
6799         /* scale down from 0-255 to 0-7 */
6800         newlevel = (s >> 5) & 0x07;
6801
6802         if (mutex_lock_killable(&fan_mutex))
6803                 return -ERESTARTSYS;
6804
6805         rc = fan_get_status(&status);
6806         if (!rc && (status &
6807                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6808                 rc = fan_set_level(newlevel);
6809                 if (rc == -ENXIO)
6810                         rc = -EINVAL;
6811                 else if (!rc) {
6812                         fan_update_desired_level(newlevel);
6813                         fan_watchdog_reset();
6814                 }
6815         }
6816
6817         mutex_unlock(&fan_mutex);
6818         return (rc)? rc : count;
6819 }
6820
6821 static struct device_attribute dev_attr_fan_pwm1 =
6822         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6823                 fan_pwm1_show, fan_pwm1_store);
6824
6825 /* sysfs fan fan1_input ------------------------------------------------ */
6826 static ssize_t fan_fan1_input_show(struct device *dev,
6827                            struct device_attribute *attr,
6828                            char *buf)
6829 {
6830         int res;
6831         unsigned int speed;
6832
6833         res = fan_get_speed(&speed);
6834         if (res < 0)
6835                 return res;
6836
6837         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6838 }
6839
6840 static struct device_attribute dev_attr_fan_fan1_input =
6841         __ATTR(fan1_input, S_IRUGO,
6842                 fan_fan1_input_show, NULL);
6843
6844 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6845 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6846                                      char *buf)
6847 {
6848         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6849 }
6850
6851 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6852                                       const char *buf, size_t count)
6853 {
6854         unsigned long t;
6855
6856         if (parse_strtoul(buf, 120, &t))
6857                 return -EINVAL;
6858
6859         if (!fan_control_allowed)
6860                 return -EPERM;
6861
6862         fan_watchdog_maxinterval = t;
6863         fan_watchdog_reset();
6864
6865         tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t);
6866
6867         return count;
6868 }
6869
6870 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6871                 fan_fan_watchdog_show, fan_fan_watchdog_store);
6872
6873 /* --------------------------------------------------------------------- */
6874 static struct attribute *fan_attributes[] = {
6875         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6876         &dev_attr_fan_fan1_input.attr,
6877         NULL
6878 };
6879
6880 static const struct attribute_group fan_attr_group = {
6881         .attrs = fan_attributes,
6882 };
6883
6884 #define TPACPI_FAN_Q1   0x0001
6885
6886 #define TPACPI_FAN_QI(__id1, __id2, __quirks)   \
6887         { .vendor = PCI_VENDOR_ID_IBM,          \
6888           .bios = TPACPI_MATCH_ANY,             \
6889           .ec = TPID(__id1, __id2),             \
6890           .quirks = __quirks }
6891
6892 static const struct tpacpi_quirk fan_quirk_table[] __initconst = {
6893         TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1),
6894         TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1),
6895         TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1),
6896         TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1),
6897 };
6898
6899 #undef TPACPI_FAN_QI
6900
6901 static int __init fan_init(struct ibm_init_struct *iibm)
6902 {
6903         int rc;
6904         unsigned long quirks;
6905
6906         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6907                         "initializing fan subdriver\n");
6908
6909         mutex_init(&fan_mutex);
6910         fan_status_access_mode = TPACPI_FAN_NONE;
6911         fan_control_access_mode = TPACPI_FAN_WR_NONE;
6912         fan_control_commands = 0;
6913         fan_watchdog_maxinterval = 0;
6914         tp_features.fan_ctrl_status_undef = 0;
6915         fan_control_desired_level = 7;
6916
6917         TPACPI_ACPIHANDLE_INIT(fans);
6918         TPACPI_ACPIHANDLE_INIT(gfan);
6919         TPACPI_ACPIHANDLE_INIT(sfan);
6920
6921         quirks = tpacpi_check_quirks(fan_quirk_table,
6922                                      ARRAY_SIZE(fan_quirk_table));
6923
6924         if (gfan_handle) {
6925                 /* 570, 600e/x, 770e, 770x */
6926                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6927         } else {
6928                 /* all other ThinkPads: note that even old-style
6929                  * ThinkPad ECs supports the fan control register */
6930                 if (likely(acpi_ec_read(fan_status_offset,
6931                                         &fan_control_initial_status))) {
6932                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6933                         if (quirks & TPACPI_FAN_Q1)
6934                                 fan_quirk1_setup();
6935                 } else {
6936                         printk(TPACPI_ERR
6937                                "ThinkPad ACPI EC access misbehaving, "
6938                                "fan status and control unavailable\n");
6939                         return 1;
6940                 }
6941         }
6942
6943         if (sfan_handle) {
6944                 /* 570, 770x-JL */
6945                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6946                 fan_control_commands |=
6947                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6948         } else {
6949                 if (!gfan_handle) {
6950                         /* gfan without sfan means no fan control */
6951                         /* all other models implement TP EC 0x2f control */
6952
6953                         if (fans_handle) {
6954                                 /* X31, X40, X41 */
6955                                 fan_control_access_mode =
6956                                     TPACPI_FAN_WR_ACPI_FANS;
6957                                 fan_control_commands |=
6958                                     TPACPI_FAN_CMD_SPEED |
6959                                     TPACPI_FAN_CMD_LEVEL |
6960                                     TPACPI_FAN_CMD_ENABLE;
6961                         } else {
6962                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6963                                 fan_control_commands |=
6964                                     TPACPI_FAN_CMD_LEVEL |
6965                                     TPACPI_FAN_CMD_ENABLE;
6966                         }
6967                 }
6968         }
6969
6970         vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6971                 "fan is %s, modes %d, %d\n",
6972                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6973                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
6974                 fan_status_access_mode, fan_control_access_mode);
6975
6976         /* fan control master switch */
6977         if (!fan_control_allowed) {
6978                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6979                 fan_control_commands = 0;
6980                 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN,
6981                            "fan control features disabled by parameter\n");
6982         }
6983
6984         /* update fan_control_desired_level */
6985         if (fan_status_access_mode != TPACPI_FAN_NONE)
6986                 fan_get_status_safe(NULL);
6987
6988         if (fan_status_access_mode != TPACPI_FAN_NONE ||
6989             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6990                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6991                                          &fan_attr_group);
6992                 if (rc < 0)
6993                         return rc;
6994
6995                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6996                                         &driver_attr_fan_watchdog);
6997                 if (rc < 0) {
6998                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6999                                         &fan_attr_group);
7000                         return rc;
7001                 }
7002                 return 0;
7003         } else
7004                 return 1;
7005 }
7006
7007 static void fan_exit(void)
7008 {
7009         vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN,
7010                     "cancelling any pending fan watchdog tasks\n");
7011
7012         /* FIXME: can we really do this unconditionally? */
7013         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
7014         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
7015                            &driver_attr_fan_watchdog);
7016
7017         cancel_delayed_work(&fan_watchdog_task);
7018         flush_workqueue(tpacpi_wq);
7019 }
7020
7021 static void fan_suspend(pm_message_t state)
7022 {
7023         int rc;
7024
7025         if (!fan_control_allowed)
7026                 return;
7027
7028         /* Store fan status in cache */
7029         fan_control_resume_level = 0;
7030         rc = fan_get_status_safe(&fan_control_resume_level);
7031         if (rc < 0)
7032                 printk(TPACPI_NOTICE
7033                         "failed to read fan level for later "
7034                         "restore during resume: %d\n", rc);
7035
7036         /* if it is undefined, don't attempt to restore it.
7037          * KEEP THIS LAST */
7038         if (tp_features.fan_ctrl_status_undef)
7039                 fan_control_resume_level = 0;
7040 }
7041
7042 static void fan_resume(void)
7043 {
7044         u8 current_level = 7;
7045         bool do_set = false;
7046         int rc;
7047
7048         /* DSDT *always* updates status on resume */
7049         tp_features.fan_ctrl_status_undef = 0;
7050
7051         if (!fan_control_allowed ||
7052             !fan_control_resume_level ||
7053             (fan_get_status_safe(&current_level) < 0))
7054                 return;
7055
7056         switch (fan_control_access_mode) {
7057         case TPACPI_FAN_WR_ACPI_SFAN:
7058                 /* never decrease fan level */
7059                 do_set = (fan_control_resume_level > current_level);
7060                 break;
7061         case TPACPI_FAN_WR_ACPI_FANS:
7062         case TPACPI_FAN_WR_TPEC:
7063                 /* never decrease fan level, scale is:
7064                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
7065                  *
7066                  * We expect the firmware to set either 7 or AUTO, but we
7067                  * handle FULLSPEED out of paranoia.
7068                  *
7069                  * So, we can safely only restore FULLSPEED or 7, anything
7070                  * else could slow the fan.  Restoring AUTO is useless, at
7071                  * best that's exactly what the DSDT already set (it is the
7072                  * slower it uses).
7073                  *
7074                  * Always keep in mind that the DSDT *will* have set the
7075                  * fans to what the vendor supposes is the best level.  We
7076                  * muck with it only to speed the fan up.
7077                  */
7078                 if (fan_control_resume_level != 7 &&
7079                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
7080                         return;
7081                 else
7082                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
7083                                  (current_level != fan_control_resume_level);
7084                 break;
7085         default:
7086                 return;
7087         }
7088         if (do_set) {
7089                 printk(TPACPI_NOTICE
7090                         "restoring fan level to 0x%02x\n",
7091                         fan_control_resume_level);
7092                 rc = fan_set_level_safe(fan_control_resume_level);
7093                 if (rc < 0)
7094                         printk(TPACPI_NOTICE
7095                                 "failed to restore fan level: %d\n", rc);
7096         }
7097 }
7098
7099 static int fan_read(char *p)
7100 {
7101         int len = 0;
7102         int rc;
7103         u8 status;
7104         unsigned int speed = 0;
7105
7106         switch (fan_status_access_mode) {
7107         case TPACPI_FAN_RD_ACPI_GFAN:
7108                 /* 570, 600e/x, 770e, 770x */
7109                 rc = fan_get_status_safe(&status);
7110                 if (rc < 0)
7111                         return rc;
7112
7113                 len += sprintf(p + len, "status:\t\t%s\n"
7114                                "level:\t\t%d\n",
7115                                (status != 0) ? "enabled" : "disabled", status);
7116                 break;
7117
7118         case TPACPI_FAN_RD_TPEC:
7119                 /* all except 570, 600e/x, 770e, 770x */
7120                 rc = fan_get_status_safe(&status);
7121                 if (rc < 0)
7122                         return rc;
7123
7124                 len += sprintf(p + len, "status:\t\t%s\n",
7125                                (status != 0) ? "enabled" : "disabled");
7126
7127                 rc = fan_get_speed(&speed);
7128                 if (rc < 0)
7129                         return rc;
7130
7131                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
7132
7133                 if (status & TP_EC_FAN_FULLSPEED)
7134                         /* Disengaged mode takes precedence */
7135                         len += sprintf(p + len, "level:\t\tdisengaged\n");
7136                 else if (status & TP_EC_FAN_AUTO)
7137                         len += sprintf(p + len, "level:\t\tauto\n");
7138                 else
7139                         len += sprintf(p + len, "level:\t\t%d\n", status);
7140                 break;
7141
7142         case TPACPI_FAN_NONE:
7143         default:
7144                 len += sprintf(p + len, "status:\t\tnot supported\n");
7145         }
7146
7147         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
7148                 len += sprintf(p + len, "commands:\tlevel <level>");
7149
7150                 switch (fan_control_access_mode) {
7151                 case TPACPI_FAN_WR_ACPI_SFAN:
7152                         len += sprintf(p + len, " (<level> is 0-7)\n");
7153                         break;
7154
7155                 default:
7156                         len += sprintf(p + len, " (<level> is 0-7, "
7157                                        "auto, disengaged, full-speed)\n");
7158                         break;
7159                 }
7160         }
7161
7162         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
7163                 len += sprintf(p + len, "commands:\tenable, disable\n"
7164                                "commands:\twatchdog <timeout> (<timeout> "
7165                                "is 0 (off), 1-120 (seconds))\n");
7166
7167         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
7168                 len += sprintf(p + len, "commands:\tspeed <speed>"
7169                                " (<speed> is 0-65535)\n");
7170
7171         return len;
7172 }
7173
7174 static int fan_write_cmd_level(const char *cmd, int *rc)
7175 {
7176         int level;
7177
7178         if (strlencmp(cmd, "level auto") == 0)
7179                 level = TP_EC_FAN_AUTO;
7180         else if ((strlencmp(cmd, "level disengaged") == 0) |
7181                         (strlencmp(cmd, "level full-speed") == 0))
7182                 level = TP_EC_FAN_FULLSPEED;
7183         else if (sscanf(cmd, "level %d", &level) != 1)
7184                 return 0;
7185
7186         *rc = fan_set_level_safe(level);
7187         if (*rc == -ENXIO)
7188                 printk(TPACPI_ERR "level command accepted for unsupported "
7189                        "access mode %d", fan_control_access_mode);
7190         else if (!*rc)
7191                 tpacpi_disclose_usertask("procfs fan",
7192                         "set level to %d\n", level);
7193
7194         return 1;
7195 }
7196
7197 static int fan_write_cmd_enable(const char *cmd, int *rc)
7198 {
7199         if (strlencmp(cmd, "enable") != 0)
7200                 return 0;
7201
7202         *rc = fan_set_enable();
7203         if (*rc == -ENXIO)
7204                 printk(TPACPI_ERR "enable command accepted for unsupported "
7205                        "access mode %d", fan_control_access_mode);
7206         else if (!*rc)
7207                 tpacpi_disclose_usertask("procfs fan", "enable\n");
7208
7209         return 1;
7210 }
7211
7212 static int fan_write_cmd_disable(const char *cmd, int *rc)
7213 {
7214         if (strlencmp(cmd, "disable") != 0)
7215                 return 0;
7216
7217         *rc = fan_set_disable();
7218         if (*rc == -ENXIO)
7219                 printk(TPACPI_ERR "disable command accepted for unsupported "
7220                        "access mode %d", fan_control_access_mode);
7221         else if (!*rc)
7222                 tpacpi_disclose_usertask("procfs fan", "disable\n");
7223
7224         return 1;
7225 }
7226
7227 static int fan_write_cmd_speed(const char *cmd, int *rc)
7228 {
7229         int speed;
7230
7231         /* TODO:
7232          * Support speed <low> <medium> <high> ? */
7233
7234         if (sscanf(cmd, "speed %d", &speed) != 1)
7235                 return 0;
7236
7237         *rc = fan_set_speed(speed);
7238         if (*rc == -ENXIO)
7239                 printk(TPACPI_ERR "speed command accepted for unsupported "
7240                        "access mode %d", fan_control_access_mode);
7241         else if (!*rc)
7242                 tpacpi_disclose_usertask("procfs fan",
7243                         "set speed to %d\n", speed);
7244
7245         return 1;
7246 }
7247
7248 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
7249 {
7250         int interval;
7251
7252         if (sscanf(cmd, "watchdog %d", &interval) != 1)
7253                 return 0;
7254
7255         if (interval < 0 || interval > 120)
7256                 *rc = -EINVAL;
7257         else {
7258                 fan_watchdog_maxinterval = interval;
7259                 tpacpi_disclose_usertask("procfs fan",
7260                         "set watchdog timer to %d\n",
7261                         interval);
7262         }
7263
7264         return 1;
7265 }
7266
7267 static int fan_write(char *buf)
7268 {
7269         char *cmd;
7270         int rc = 0;
7271
7272         while (!rc && (cmd = next_cmd(&buf))) {
7273                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
7274                       fan_write_cmd_level(cmd, &rc)) &&
7275                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
7276                       (fan_write_cmd_enable(cmd, &rc) ||
7277                        fan_write_cmd_disable(cmd, &rc) ||
7278                        fan_write_cmd_watchdog(cmd, &rc))) &&
7279                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
7280                       fan_write_cmd_speed(cmd, &rc))
7281                     )
7282                         rc = -EINVAL;
7283                 else if (!rc)
7284                         fan_watchdog_reset();
7285         }
7286
7287         return rc;
7288 }
7289
7290 static struct ibm_struct fan_driver_data = {
7291         .name = "fan",
7292         .read = fan_read,
7293         .write = fan_write,
7294         .exit = fan_exit,
7295         .suspend = fan_suspend,
7296         .resume = fan_resume,
7297 };
7298
7299 /****************************************************************************
7300  ****************************************************************************
7301  *
7302  * Infrastructure
7303  *
7304  ****************************************************************************
7305  ****************************************************************************/
7306
7307 /* sysfs name ---------------------------------------------------------- */
7308 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
7309                            struct device_attribute *attr,
7310                            char *buf)
7311 {
7312         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
7313 }
7314
7315 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
7316         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
7317
7318 /* --------------------------------------------------------------------- */
7319
7320 /* /proc support */
7321 static struct proc_dir_entry *proc_dir;
7322
7323 /*
7324  * Module and infrastructure proble, init and exit handling
7325  */
7326
7327 static int force_load;
7328
7329 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
7330 static const char * __init str_supported(int is_supported)
7331 {
7332         static char text_unsupported[] __initdata = "not supported";
7333
7334         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
7335 }
7336 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
7337
7338 static void ibm_exit(struct ibm_struct *ibm)
7339 {
7340         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
7341
7342         list_del_init(&ibm->all_drivers);
7343
7344         if (ibm->flags.acpi_notify_installed) {
7345                 dbg_printk(TPACPI_DBG_EXIT,
7346                         "%s: acpi_remove_notify_handler\n", ibm->name);
7347                 BUG_ON(!ibm->acpi);
7348                 acpi_remove_notify_handler(*ibm->acpi->handle,
7349                                            ibm->acpi->type,
7350                                            dispatch_acpi_notify);
7351                 ibm->flags.acpi_notify_installed = 0;
7352                 ibm->flags.acpi_notify_installed = 0;
7353         }
7354
7355         if (ibm->flags.proc_created) {
7356                 dbg_printk(TPACPI_DBG_EXIT,
7357                         "%s: remove_proc_entry\n", ibm->name);
7358                 remove_proc_entry(ibm->name, proc_dir);
7359                 ibm->flags.proc_created = 0;
7360         }
7361
7362         if (ibm->flags.acpi_driver_registered) {
7363                 dbg_printk(TPACPI_DBG_EXIT,
7364                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7365                 BUG_ON(!ibm->acpi);
7366                 acpi_bus_unregister_driver(ibm->acpi->driver);
7367                 kfree(ibm->acpi->driver);
7368                 ibm->acpi->driver = NULL;
7369                 ibm->flags.acpi_driver_registered = 0;
7370         }
7371
7372         if (ibm->flags.init_called && ibm->exit) {
7373                 ibm->exit();
7374                 ibm->flags.init_called = 0;
7375         }
7376
7377         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7378 }
7379
7380 static int __init ibm_init(struct ibm_init_struct *iibm)
7381 {
7382         int ret;
7383         struct ibm_struct *ibm = iibm->data;
7384         struct proc_dir_entry *entry;
7385
7386         BUG_ON(ibm == NULL);
7387
7388         INIT_LIST_HEAD(&ibm->all_drivers);
7389
7390         if (ibm->flags.experimental && !experimental)
7391                 return 0;
7392
7393         dbg_printk(TPACPI_DBG_INIT,
7394                 "probing for %s\n", ibm->name);
7395
7396         if (iibm->init) {
7397                 ret = iibm->init(iibm);
7398                 if (ret > 0)
7399                         return 0;       /* probe failed */
7400                 if (ret)
7401                         return ret;
7402
7403                 ibm->flags.init_called = 1;
7404         }
7405
7406         if (ibm->acpi) {
7407                 if (ibm->acpi->hid) {
7408                         ret = register_tpacpi_subdriver(ibm);
7409                         if (ret)
7410                                 goto err_out;
7411                 }
7412
7413                 if (ibm->acpi->notify) {
7414                         ret = setup_acpi_notify(ibm);
7415                         if (ret == -ENODEV) {
7416                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7417                                         ibm->name);
7418                                 ret = 0;
7419                                 goto err_out;
7420                         }
7421                         if (ret < 0)
7422                                 goto err_out;
7423                 }
7424         }
7425
7426         dbg_printk(TPACPI_DBG_INIT,
7427                 "%s installed\n", ibm->name);
7428
7429         if (ibm->read) {
7430                 entry = create_proc_entry(ibm->name,
7431                                           S_IFREG | S_IRUGO | S_IWUSR,
7432                                           proc_dir);
7433                 if (!entry) {
7434                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7435                                ibm->name);
7436                         ret = -ENODEV;
7437                         goto err_out;
7438                 }
7439                 entry->data = ibm;
7440                 entry->read_proc = &dispatch_procfs_read;
7441                 if (ibm->write)
7442                         entry->write_proc = &dispatch_procfs_write;
7443                 ibm->flags.proc_created = 1;
7444         }
7445
7446         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7447
7448         return 0;
7449
7450 err_out:
7451         dbg_printk(TPACPI_DBG_INIT,
7452                 "%s: at error exit path with result %d\n",
7453                 ibm->name, ret);
7454
7455         ibm_exit(ibm);
7456         return (ret < 0)? ret : 0;
7457 }
7458
7459 /* Probing */
7460
7461 static bool __pure __init tpacpi_is_fw_digit(const char c)
7462 {
7463         return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z');
7464 }
7465
7466 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */
7467 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s,
7468                                                 const char t)
7469 {
7470         return s && strlen(s) >= 8 &&
7471                 tpacpi_is_fw_digit(s[0]) &&
7472                 tpacpi_is_fw_digit(s[1]) &&
7473                 s[2] == t && s[3] == 'T' &&
7474                 tpacpi_is_fw_digit(s[4]) &&
7475                 tpacpi_is_fw_digit(s[5]) &&
7476                 s[6] == 'W' && s[7] == 'W';
7477 }
7478
7479 /* returns 0 - probe ok, or < 0 - probe error.
7480  * Probe ok doesn't mean thinkpad found.
7481  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7482 static int __must_check __init get_thinkpad_model_data(
7483                                                 struct thinkpad_id_data *tp)
7484 {
7485         const struct dmi_device *dev = NULL;
7486         char ec_fw_string[18];
7487         char const *s;
7488
7489         if (!tp)
7490                 return -EINVAL;
7491
7492         memset(tp, 0, sizeof(*tp));
7493
7494         if (dmi_name_in_vendors("IBM"))
7495                 tp->vendor = PCI_VENDOR_ID_IBM;
7496         else if (dmi_name_in_vendors("LENOVO"))
7497                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7498         else
7499                 return 0;
7500
7501         s = dmi_get_system_info(DMI_BIOS_VERSION);
7502         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7503         if (s && !tp->bios_version_str)
7504                 return -ENOMEM;
7505
7506         /* Really ancient ThinkPad 240X will fail this, which is fine */
7507         if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E'))
7508                 return 0;
7509
7510         tp->bios_model = tp->bios_version_str[0]
7511                          | (tp->bios_version_str[1] << 8);
7512         tp->bios_release = (tp->bios_version_str[4] << 8)
7513                          | tp->bios_version_str[5];
7514
7515         /*
7516          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7517          * X32 or newer, all Z series;  Some models must have an
7518          * up-to-date BIOS or they will not be detected.
7519          *
7520          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7521          */
7522         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7523                 if (sscanf(dev->name,
7524                            "IBM ThinkPad Embedded Controller -[%17c",
7525                            ec_fw_string) == 1) {
7526                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7527                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7528
7529                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7530                         if (!tp->ec_version_str)
7531                                 return -ENOMEM;
7532
7533                         if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) {
7534                                 tp->ec_model = ec_fw_string[0]
7535                                                 | (ec_fw_string[1] << 8);
7536                                 tp->ec_release = (ec_fw_string[4] << 8)
7537                                                 | ec_fw_string[5];
7538                         } else {
7539                                 printk(TPACPI_NOTICE
7540                                         "ThinkPad firmware release %s "
7541                                         "doesn't match the known patterns\n",
7542                                         ec_fw_string);
7543                                 printk(TPACPI_NOTICE
7544                                         "please report this to %s\n",
7545                                         TPACPI_MAIL);
7546                         }
7547                         break;
7548                 }
7549         }
7550
7551         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7552         if (s && !strnicmp(s, "ThinkPad", 8)) {
7553                 tp->model_str = kstrdup(s, GFP_KERNEL);
7554                 if (!tp->model_str)
7555                         return -ENOMEM;
7556         }
7557
7558         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7559         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7560         if (s && !tp->nummodel_str)
7561                 return -ENOMEM;
7562
7563         return 0;
7564 }
7565
7566 static int __init probe_for_thinkpad(void)
7567 {
7568         int is_thinkpad;
7569
7570         if (acpi_disabled)
7571                 return -ENODEV;
7572
7573         /*
7574          * Non-ancient models have better DMI tagging, but very old models
7575          * don't.
7576          */
7577         is_thinkpad = (thinkpad_id.model_str != NULL);
7578
7579         /* ec is required because many other handles are relative to it */
7580         TPACPI_ACPIHANDLE_INIT(ec);
7581         if (!ec_handle) {
7582                 if (is_thinkpad)
7583                         printk(TPACPI_ERR
7584                                 "Not yet supported ThinkPad detected!\n");
7585                 return -ENODEV;
7586         }
7587
7588         /*
7589          * Risks a regression on very old machines, but reduces potential
7590          * false positives a damn great deal
7591          */
7592         if (!is_thinkpad)
7593                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7594
7595         if (!is_thinkpad && !force_load)
7596                 return -ENODEV;
7597
7598         return 0;
7599 }
7600
7601
7602 /* Module init, exit, parameters */
7603
7604 static struct ibm_init_struct ibms_init[] __initdata = {
7605         {
7606                 .init = thinkpad_acpi_driver_init,
7607                 .data = &thinkpad_acpi_driver_data,
7608         },
7609         {
7610                 .init = hotkey_init,
7611                 .data = &hotkey_driver_data,
7612         },
7613         {
7614                 .init = bluetooth_init,
7615                 .data = &bluetooth_driver_data,
7616         },
7617         {
7618                 .init = wan_init,
7619                 .data = &wan_driver_data,
7620         },
7621         {
7622                 .init = uwb_init,
7623                 .data = &uwb_driver_data,
7624         },
7625 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7626         {
7627                 .init = video_init,
7628                 .data = &video_driver_data,
7629         },
7630 #endif
7631         {
7632                 .init = light_init,
7633                 .data = &light_driver_data,
7634         },
7635 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7636         {
7637                 .init = dock_init,
7638                 .data = &dock_driver_data[0],
7639         },
7640         {
7641                 .init = dock_init2,
7642                 .data = &dock_driver_data[1],
7643         },
7644 #endif
7645 #ifdef CONFIG_THINKPAD_ACPI_BAY
7646         {
7647                 .init = bay_init,
7648                 .data = &bay_driver_data,
7649         },
7650 #endif
7651         {
7652                 .init = cmos_init,
7653                 .data = &cmos_driver_data,
7654         },
7655         {
7656                 .init = led_init,
7657                 .data = &led_driver_data,
7658         },
7659         {
7660                 .init = beep_init,
7661                 .data = &beep_driver_data,
7662         },
7663         {
7664                 .init = thermal_init,
7665                 .data = &thermal_driver_data,
7666         },
7667         {
7668                 .data = &ecdump_driver_data,
7669         },
7670         {
7671                 .init = brightness_init,
7672                 .data = &brightness_driver_data,
7673         },
7674         {
7675                 .data = &volume_driver_data,
7676         },
7677         {
7678                 .init = fan_init,
7679                 .data = &fan_driver_data,
7680         },
7681 };
7682
7683 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7684 {
7685         unsigned int i;
7686         struct ibm_struct *ibm;
7687
7688         if (!kp || !kp->name || !val)
7689                 return -EINVAL;
7690
7691         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7692                 ibm = ibms_init[i].data;
7693                 WARN_ON(ibm == NULL);
7694
7695                 if (!ibm || !ibm->name)
7696                         continue;
7697
7698                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7699                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7700                                 return -ENOSPC;
7701                         strcpy(ibms_init[i].param, val);
7702                         strcat(ibms_init[i].param, ",");
7703                         return 0;
7704                 }
7705         }
7706
7707         return -EINVAL;
7708 }
7709
7710 module_param(experimental, int, 0);
7711 MODULE_PARM_DESC(experimental,
7712                  "Enables experimental features when non-zero");
7713
7714 module_param_named(debug, dbg_level, uint, 0);
7715 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7716
7717 module_param(force_load, bool, 0);
7718 MODULE_PARM_DESC(force_load,
7719                  "Attempts to load the driver even on a "
7720                  "mis-identified ThinkPad when true");
7721
7722 module_param_named(fan_control, fan_control_allowed, bool, 0);
7723 MODULE_PARM_DESC(fan_control,
7724                  "Enables setting fan parameters features when true");
7725
7726 module_param_named(brightness_mode, brightness_mode, uint, 0);
7727 MODULE_PARM_DESC(brightness_mode,
7728                  "Selects brightness control strategy: "
7729                  "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM");
7730
7731 module_param(brightness_enable, uint, 0);
7732 MODULE_PARM_DESC(brightness_enable,
7733                  "Enables backlight control when 1, disables when 0");
7734
7735 module_param(hotkey_report_mode, uint, 0);
7736 MODULE_PARM_DESC(hotkey_report_mode,
7737                  "used for backwards compatibility with userspace, "
7738                  "see documentation");
7739
7740 #define TPACPI_PARAM(feature) \
7741         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7742         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7743                          "at module load, see documentation")
7744
7745 TPACPI_PARAM(hotkey);
7746 TPACPI_PARAM(bluetooth);
7747 TPACPI_PARAM(video);
7748 TPACPI_PARAM(light);
7749 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7750 TPACPI_PARAM(dock);
7751 #endif
7752 #ifdef CONFIG_THINKPAD_ACPI_BAY
7753 TPACPI_PARAM(bay);
7754 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7755 TPACPI_PARAM(cmos);
7756 TPACPI_PARAM(led);
7757 TPACPI_PARAM(beep);
7758 TPACPI_PARAM(ecdump);
7759 TPACPI_PARAM(brightness);
7760 TPACPI_PARAM(volume);
7761 TPACPI_PARAM(fan);
7762
7763 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7764 module_param(dbg_wlswemul, uint, 0);
7765 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7766 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7767 MODULE_PARM_DESC(wlsw_state,
7768                  "Initial state of the emulated WLSW switch");
7769
7770 module_param(dbg_bluetoothemul, uint, 0);
7771 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7772 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7773 MODULE_PARM_DESC(bluetooth_state,
7774                  "Initial state of the emulated bluetooth switch");
7775
7776 module_param(dbg_wwanemul, uint, 0);
7777 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7778 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7779 MODULE_PARM_DESC(wwan_state,
7780                  "Initial state of the emulated WWAN switch");
7781
7782 module_param(dbg_uwbemul, uint, 0);
7783 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7784 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7785 MODULE_PARM_DESC(uwb_state,
7786                  "Initial state of the emulated UWB switch");
7787 #endif
7788
7789 static void thinkpad_acpi_module_exit(void)
7790 {
7791         struct ibm_struct *ibm, *itmp;
7792
7793         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7794
7795         list_for_each_entry_safe_reverse(ibm, itmp,
7796                                          &tpacpi_all_drivers,
7797                                          all_drivers) {
7798                 ibm_exit(ibm);
7799         }
7800
7801         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7802
7803         if (tpacpi_inputdev) {
7804                 if (tp_features.input_device_registered)
7805                         input_unregister_device(tpacpi_inputdev);
7806                 else
7807                         input_free_device(tpacpi_inputdev);
7808         }
7809
7810         if (tpacpi_hwmon)
7811                 hwmon_device_unregister(tpacpi_hwmon);
7812
7813         if (tp_features.sensors_pdev_attrs_registered)
7814                 device_remove_file(&tpacpi_sensors_pdev->dev,
7815                                    &dev_attr_thinkpad_acpi_pdev_name);
7816         if (tpacpi_sensors_pdev)
7817                 platform_device_unregister(tpacpi_sensors_pdev);
7818         if (tpacpi_pdev)
7819                 platform_device_unregister(tpacpi_pdev);
7820
7821         if (tp_features.sensors_pdrv_attrs_registered)
7822                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7823         if (tp_features.platform_drv_attrs_registered)
7824                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7825
7826         if (tp_features.sensors_pdrv_registered)
7827                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7828
7829         if (tp_features.platform_drv_registered)
7830                 platform_driver_unregister(&tpacpi_pdriver);
7831
7832         if (proc_dir)
7833                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7834
7835         if (tpacpi_wq)
7836                 destroy_workqueue(tpacpi_wq);
7837
7838         kfree(thinkpad_id.bios_version_str);
7839         kfree(thinkpad_id.ec_version_str);
7840         kfree(thinkpad_id.model_str);
7841 }
7842
7843
7844 static int __init thinkpad_acpi_module_init(void)
7845 {
7846         int ret, i;
7847
7848         tpacpi_lifecycle = TPACPI_LIFE_INIT;
7849
7850         /* Parameter checking */
7851         if (hotkey_report_mode > 2)
7852                 return -EINVAL;
7853
7854         /* Driver-level probe */
7855
7856         ret = get_thinkpad_model_data(&thinkpad_id);
7857         if (ret) {
7858                 printk(TPACPI_ERR
7859                         "unable to get DMI data: %d\n", ret);
7860                 thinkpad_acpi_module_exit();
7861                 return ret;
7862         }
7863         ret = probe_for_thinkpad();
7864         if (ret) {
7865                 thinkpad_acpi_module_exit();
7866                 return ret;
7867         }
7868
7869         /* Driver initialization */
7870
7871         TPACPI_ACPIHANDLE_INIT(ecrd);
7872         TPACPI_ACPIHANDLE_INIT(ecwr);
7873
7874         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7875         if (!tpacpi_wq) {
7876                 thinkpad_acpi_module_exit();
7877                 return -ENOMEM;
7878         }
7879
7880         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7881         if (!proc_dir) {
7882                 printk(TPACPI_ERR
7883                        "unable to create proc dir " TPACPI_PROC_DIR);
7884                 thinkpad_acpi_module_exit();
7885                 return -ENODEV;
7886         }
7887
7888         ret = platform_driver_register(&tpacpi_pdriver);
7889         if (ret) {
7890                 printk(TPACPI_ERR
7891                        "unable to register main platform driver\n");
7892                 thinkpad_acpi_module_exit();
7893                 return ret;
7894         }
7895         tp_features.platform_drv_registered = 1;
7896
7897         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7898         if (ret) {
7899                 printk(TPACPI_ERR
7900                        "unable to register hwmon platform driver\n");
7901                 thinkpad_acpi_module_exit();
7902                 return ret;
7903         }
7904         tp_features.sensors_pdrv_registered = 1;
7905
7906         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7907         if (!ret) {
7908                 tp_features.platform_drv_attrs_registered = 1;
7909                 ret = tpacpi_create_driver_attributes(
7910                                         &tpacpi_hwmon_pdriver.driver);
7911         }
7912         if (ret) {
7913                 printk(TPACPI_ERR
7914                        "unable to create sysfs driver attributes\n");
7915                 thinkpad_acpi_module_exit();
7916                 return ret;
7917         }
7918         tp_features.sensors_pdrv_attrs_registered = 1;
7919
7920
7921         /* Device initialization */
7922         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7923                                                         NULL, 0);
7924         if (IS_ERR(tpacpi_pdev)) {
7925                 ret = PTR_ERR(tpacpi_pdev);
7926                 tpacpi_pdev = NULL;
7927                 printk(TPACPI_ERR "unable to register platform device\n");
7928                 thinkpad_acpi_module_exit();
7929                 return ret;
7930         }
7931         tpacpi_sensors_pdev = platform_device_register_simple(
7932                                                 TPACPI_HWMON_DRVR_NAME,
7933                                                 -1, NULL, 0);
7934         if (IS_ERR(tpacpi_sensors_pdev)) {
7935                 ret = PTR_ERR(tpacpi_sensors_pdev);
7936                 tpacpi_sensors_pdev = NULL;
7937                 printk(TPACPI_ERR
7938                        "unable to register hwmon platform device\n");
7939                 thinkpad_acpi_module_exit();
7940                 return ret;
7941         }
7942         ret = device_create_file(&tpacpi_sensors_pdev->dev,
7943                                  &dev_attr_thinkpad_acpi_pdev_name);
7944         if (ret) {
7945                 printk(TPACPI_ERR
7946                        "unable to create sysfs hwmon device attributes\n");
7947                 thinkpad_acpi_module_exit();
7948                 return ret;
7949         }
7950         tp_features.sensors_pdev_attrs_registered = 1;
7951         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7952         if (IS_ERR(tpacpi_hwmon)) {
7953                 ret = PTR_ERR(tpacpi_hwmon);
7954                 tpacpi_hwmon = NULL;
7955                 printk(TPACPI_ERR "unable to register hwmon device\n");
7956                 thinkpad_acpi_module_exit();
7957                 return ret;
7958         }
7959         mutex_init(&tpacpi_inputdev_send_mutex);
7960         tpacpi_inputdev = input_allocate_device();
7961         if (!tpacpi_inputdev) {
7962                 printk(TPACPI_ERR "unable to allocate input device\n");
7963                 thinkpad_acpi_module_exit();
7964                 return -ENOMEM;
7965         } else {
7966                 /* Prepare input device, but don't register */
7967                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7968                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7969                 tpacpi_inputdev->id.bustype = BUS_HOST;
7970                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7971                                                 thinkpad_id.vendor :
7972                                                 PCI_VENDOR_ID_IBM;
7973                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7974                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7975         }
7976         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7977                 ret = ibm_init(&ibms_init[i]);
7978                 if (ret >= 0 && *ibms_init[i].param)
7979                         ret = ibms_init[i].data->write(ibms_init[i].param);
7980                 if (ret < 0) {
7981                         thinkpad_acpi_module_exit();
7982                         return ret;
7983                 }
7984         }
7985         ret = input_register_device(tpacpi_inputdev);
7986         if (ret < 0) {
7987                 printk(TPACPI_ERR "unable to register input device\n");
7988                 thinkpad_acpi_module_exit();
7989                 return ret;
7990         } else {
7991                 tp_features.input_device_registered = 1;
7992         }
7993
7994         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7995         return 0;
7996 }
7997
7998 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7999
8000 /*
8001  * This will autoload the driver in almost every ThinkPad
8002  * in widespread use.
8003  *
8004  * Only _VERY_ old models, like the 240, 240x and 570 lack
8005  * the HKEY event interface.
8006  */
8007 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids);
8008
8009 /*
8010  * DMI matching for module autoloading
8011  *
8012  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
8013  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
8014  *
8015  * Only models listed in thinkwiki will be supported, so add yours
8016  * if it is not there yet.
8017  */
8018 #define IBM_BIOS_MODULE_ALIAS(__type) \
8019         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
8020
8021 /* Ancient thinkpad BIOSes have to be identified by
8022  * BIOS type or model number, and there are far less
8023  * BIOS types than model numbers... */
8024 IBM_BIOS_MODULE_ALIAS("I[MU]");         /* 570, 570e */
8025
8026 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>");
8027 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>");
8028 MODULE_DESCRIPTION(TPACPI_DESC);
8029 MODULE_VERSION(TPACPI_VERSION);
8030 MODULE_LICENSE("GPL");
8031
8032 module_init(thinkpad_acpi_module_init);
8033 module_exit(thinkpad_acpi_module_exit);