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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 "0.22"
  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
 193 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 194 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 195 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 196
 197
 198 /****************************************************************************
 199  * Driver-wide structs and misc. variables
 200  */
 201
 202 struct ibm_struct;
 203
 204 struct tp_acpi_drv_struct {
 205         const struct acpi_device_id *hid;
 206         struct acpi_driver *driver;
 207
 208         void (*notify) (struct ibm_struct *, u32);
 209         acpi_handle *handle;
 210         u32 type;
 211         struct acpi_device *device;
 212 };
 213
 214 struct ibm_struct {
 215         char *name;
 216
 217         int (*read) (char *);
 218         int (*write) (char *);
 219         void (*exit) (void);
 220         void (*resume) (void);
 221         void (*suspend) (pm_message_t state);
 222         void (*shutdown) (void);
 223
 224         struct list_head all_drivers;
 225
 226         struct tp_acpi_drv_struct *acpi;
 227
 228         struct {
 229                 u8 acpi_driver_registered:1;
 230                 u8 acpi_notify_installed:1;
 231                 u8 proc_created:1;
 232                 u8 init_called:1;
 233                 u8 experimental:1;
 234         } flags;
 235 };
 236
 237 struct ibm_init_struct {
 238         char param[32];
 239
 240         int (*init) (struct ibm_init_struct *);
 241         struct ibm_struct *data;
 242 };
 243
 244 static struct {
 245 #ifdef CONFIG_THINKPAD_ACPI_BAY
 246         u32 bay_status:1;
 247         u32 bay_eject:1;
 248         u32 bay_status2:1;
 249         u32 bay_eject2:1;
 250 #endif
 251         u32 bluetooth:1;
 252         u32 hotkey:1;
 253         u32 hotkey_mask:1;
 254         u32 hotkey_wlsw:1;
 255         u32 hotkey_tablet:1;
 256         u32 light:1;
 257         u32 light_status:1;
 258         u32 bright_16levels:1;
 259         u32 bright_acpimode:1;
 260         u32 wan:1;
 261         u32 uwb:1;
 262         u32 fan_ctrl_status_undef:1;
 263         u32 input_device_registered:1;
 264         u32 platform_drv_registered:1;
 265         u32 platform_drv_attrs_registered:1;
 266         u32 sensors_pdrv_registered:1;
 267         u32 sensors_pdrv_attrs_registered:1;
 268         u32 sensors_pdev_attrs_registered:1;
 269         u32 hotkey_poll_active:1;
 270 } tp_features;
 271
 272 static struct {
 273         u16 hotkey_mask_ff:1;
 274         u16 bright_cmos_ec_unsync:1;
 275 } tp_warned;
 276
 277 struct thinkpad_id_data {
 278         unsigned int vendor;    /* ThinkPad vendor:
 279                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 280
 281         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 282         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 283
 284         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 285         u16 ec_model;
 286
 287         char *model_str;        /* ThinkPad T43 */
 288         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 289 };
 290 static struct thinkpad_id_data thinkpad_id;
 291
 292 static enum {
 293         TPACPI_LIFE_INIT = 0,
 294         TPACPI_LIFE_RUNNING,
 295         TPACPI_LIFE_EXITING,
 296 } tpacpi_lifecycle;
 297
 298 static int experimental;
 299 static u32 dbg_level;
 300
 301 static struct workqueue_struct *tpacpi_wq;
 302
 303 /* Special LED class that can defer work */
 304 struct tpacpi_led_classdev {
 305         struct led_classdev led_classdev;
 306         struct work_struct work;
 307         enum led_brightness new_brightness;
 308         unsigned int led;
 309 };
 310
 311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
 312 static int dbg_wlswemul;
 313 static int tpacpi_wlsw_emulstate;
 314 static int dbg_bluetoothemul;
 315 static int tpacpi_bluetooth_emulstate;
 316 static int dbg_wwanemul;
 317 static int tpacpi_wwan_emulstate;
 318 static int dbg_uwbemul;
 319 static int tpacpi_uwb_emulstate;
 320 #endif
 321
 322
 323 /*************************************************************************
 324  *  Debugging helpers
 325  */
 326
 327 #define dbg_printk(a_dbg_level, format, arg...) \
 328         do { if (dbg_level & (a_dbg_level)) \
 329                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 330         } while (0)
 331
 332 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 333 #define vdbg_printk dbg_printk
 334 static const char *str_supported(int is_supported);
 335 #else
 336 #define vdbg_printk(a_dbg_level, format, arg...) \
 337         do { } while (0)
 338 #endif
 339
 340 static void tpacpi_log_usertask(const char * const what)
 341 {
 342         printk(TPACPI_DEBUG "%s: access by process with PID %d\n",
 343                 what, task_tgid_vnr(current));
 344 }
 345
 346 #define tpacpi_disclose_usertask(what, format, arg...) \
 347         do { \
 348                 if (unlikely( \
 349                     (dbg_level & TPACPI_DBG_DISCLOSETASK) && \
 350                     (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \
 351                         printk(TPACPI_DEBUG "%s: PID %d: " format, \
 352                                 what, task_tgid_vnr(current), ## arg); \
 353                 } \
 354         } while (0)
 355
 356 /****************************************************************************
 357  ****************************************************************************
 358  *
 359  * ACPI Helpers and device model
 360  *
 361  ****************************************************************************
 362  ****************************************************************************/
 363
 364 /*************************************************************************
 365  * ACPI basic handles
 366  */
 367
 368 static acpi_handle root_handle;
 369
 370 #define TPACPI_HANDLE(object, parent, paths...)                 \
 371         static acpi_handle  object##_handle;                    \
 372         static acpi_handle *object##_parent = &parent##_handle; \
 373         static char        *object##_path;                      \
 374         static char        *object##_paths[] = { paths }
 375
 376 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 377            "\\_SB.PCI.ISA.EC",  /* 570 */
 378            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 379            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 380            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 381            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 382            "\\_SB.PCI0.LPC.EC", /* all others */
 383            );
 384
 385 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 386 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 387
 388 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 389                                         /* T4x, X31, X40 */
 390            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 391            "\\CMS",             /* R40, R40e */
 392            );                   /* all others */
 393
 394 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 395            "^HKEY",             /* R30, R31 */
 396            "HKEY",              /* all others */
 397            );                   /* 570 */
 398
 399 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 400            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 401            "\\_SB.PCI0.VID0",   /* 770e */
 402            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 403            "\\_SB.PCI0.AGP.VID",        /* all others */
 404            );                           /* R30, R31 */
 405
 406
 407 /*************************************************************************
 408  * ACPI helpers
 409  */
 410
 411 static int acpi_evalf(acpi_handle handle,
 412                       void *res, char *method, char *fmt, ...)
 413 {
 414         char *fmt0 = fmt;
 415         struct acpi_object_list params;
 416         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 417         struct acpi_buffer result, *resultp;
 418         union acpi_object out_obj;
 419         acpi_status status;
 420         va_list ap;
 421         char res_type;
 422         int success;
 423         int quiet;
 424
 425         if (!*fmt) {
 426                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 427                 return 0;
 428         }
 429
 430         if (*fmt == 'q') {
 431                 quiet = 1;
 432                 fmt++;
 433         } else
 434                 quiet = 0;
 435
 436         res_type = *(fmt++);
 437
 438         params.count = 0;
 439         params.pointer = &in_objs[0];
 440
 441         va_start(ap, fmt);
 442         while (*fmt) {
 443                 char c = *(fmt++);
 444                 switch (c) {
 445                 case 'd':       /* int */
 446                         in_objs[params.count].integer.value = va_arg(ap, int);
 447                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 448                         break;
 449                         /* add more types as needed */
 450                 default:
 451                         printk(TPACPI_ERR "acpi_evalf() called "
 452                                "with invalid format character '%c'\n", c);
 453                         return 0;
 454                 }
 455         }
 456         va_end(ap);
 457
 458         if (res_type != 'v') {
 459                 result.length = sizeof(out_obj);
 460                 result.pointer = &out_obj;
 461                 resultp = &result;
 462         } else
 463                 resultp = NULL;
 464
 465         status = acpi_evaluate_object(handle, method, &params, resultp);
 466
 467         switch (res_type) {
 468         case 'd':               /* int */
 469                 if (res)
 470                         *(int *)res = out_obj.integer.value;
 471                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 472                 break;
 473         case 'v':               /* void */
 474                 success = status == AE_OK;
 475                 break;
 476                 /* add more types as needed */
 477         default:
 478                 printk(TPACPI_ERR "acpi_evalf() called "
 479                        "with invalid format character '%c'\n", res_type);
 480                 return 0;
 481         }
 482
 483         if (!success && !quiet)
 484                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 485                        method, fmt0, status);
 486
 487         return success;
 488 }
 489
 490 static int acpi_ec_read(int i, u8 *p)
 491 {
 492         int v;
 493
 494         if (ecrd_handle) {
 495                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 496                         return 0;
 497                 *p = v;
 498         } else {
 499                 if (ec_read(i, p) < 0)
 500                         return 0;
 501         }
 502
 503         return 1;
 504 }
 505
 506 static int acpi_ec_write(int i, u8 v)
 507 {
 508         if (ecwr_handle) {
 509                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 510                         return 0;
 511         } else {
 512                 if (ec_write(i, v) < 0)
 513                         return 0;
 514         }
 515
 516         return 1;
 517 }
 518
 519 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 520 static int _sta(acpi_handle handle)
 521 {
 522         int status;
 523
 524         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 525                 status = 0;
 526
 527         return status;
 528 }
 529 #endif
 530
 531 static int issue_thinkpad_cmos_command(int cmos_cmd)
 532 {
 533         if (!cmos_handle)
 534                 return -ENXIO;
 535
 536         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 537                 return -EIO;
 538
 539         return 0;
 540 }
 541
 542 /*************************************************************************
 543  * ACPI device model
 544  */
 545
 546 #define TPACPI_ACPIHANDLE_INIT(object) \
 547         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 548                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 549
 550 static void drv_acpi_handle_init(char *name,
 551                            acpi_handle *handle, acpi_handle parent,
 552                            char **paths, int num_paths, char **path)
 553 {
 554         int i;
 555         acpi_status status;
 556
 557         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 558                 name);
 559
 560         for (i = 0; i < num_paths; i++) {
 561                 status = acpi_get_handle(parent, paths[i], handle);
 562                 if (ACPI_SUCCESS(status)) {
 563                         *path = paths[i];
 564                         dbg_printk(TPACPI_DBG_INIT,
 565                                    "Found ACPI handle %s for %s\n",
 566                                    *path, name);
 567                         return;
 568                 }
 569         }
 570
 571         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 572                     name);
 573         *handle = NULL;
 574 }
 575
 576 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 577 {
 578         struct ibm_struct *ibm = data;
 579
 580         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 581                 return;
 582
 583         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 584                 return;
 585
 586         ibm->acpi->notify(ibm, event);
 587 }
 588
 589 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 590 {
 591         acpi_status status;
 592         int rc;
 593
 594         BUG_ON(!ibm->acpi);
 595
 596         if (!*ibm->acpi->handle)
 597                 return 0;
 598
 599         vdbg_printk(TPACPI_DBG_INIT,
 600                 "setting up ACPI notify for %s\n", ibm->name);
 601
 602         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 603         if (rc < 0) {
 604                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 605                         ibm->name, rc);
 606                 return -ENODEV;
 607         }
 608
 609         ibm->acpi->device->driver_data = ibm;
 610         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 611                 TPACPI_ACPI_EVENT_PREFIX,
 612                 ibm->name);
 613
 614         status = acpi_install_notify_handler(*ibm->acpi->handle,
 615                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 616         if (ACPI_FAILURE(status)) {
 617                 if (status == AE_ALREADY_EXISTS) {
 618                         printk(TPACPI_NOTICE
 619                                "another device driver is already "
 620                                "handling %s events\n", ibm->name);
 621                 } else {
 622                         printk(TPACPI_ERR
 623                                "acpi_install_notify_handler(%s) failed: %d\n",
 624                                ibm->name, status);
 625                 }
 626                 return -ENODEV;
 627         }
 628         ibm->flags.acpi_notify_installed = 1;
 629         return 0;
 630 }
 631
 632 static int __init tpacpi_device_add(struct acpi_device *device)
 633 {
 634         return 0;
 635 }
 636
 637 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 638 {
 639         int rc;
 640
 641         dbg_printk(TPACPI_DBG_INIT,
 642                 "registering %s as an ACPI driver\n", ibm->name);
 643
 644         BUG_ON(!ibm->acpi);
 645
 646         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 647         if (!ibm->acpi->driver) {
 648                 printk(TPACPI_ERR
 649                        "failed to allocate memory for ibm->acpi->driver\n");
 650                 return -ENOMEM;
 651         }
 652
 653         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 654         ibm->acpi->driver->ids = ibm->acpi->hid;
 655
 656         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 657
 658         rc = acpi_bus_register_driver(ibm->acpi->driver);
 659         if (rc < 0) {
 660                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 661                        ibm->name, rc);
 662                 kfree(ibm->acpi->driver);
 663                 ibm->acpi->driver = NULL;
 664         } else if (!rc)
 665                 ibm->flags.acpi_driver_registered = 1;
 666
 667         return rc;
 668 }
 669
 670
 671 /****************************************************************************
 672  ****************************************************************************
 673  *
 674  * Procfs Helpers
 675  *
 676  ****************************************************************************
 677  ****************************************************************************/
 678
 679 static int dispatch_procfs_read(char *page, char **start, off_t off,
 680                         int count, int *eof, void *data)
 681 {
 682         struct ibm_struct *ibm = data;
 683         int len;
 684
 685         if (!ibm || !ibm->read)
 686                 return -EINVAL;
 687
 688         len = ibm->read(page);
 689         if (len < 0)
 690                 return len;
 691
 692         if (len <= off + count)
 693                 *eof = 1;
 694         *start = page + off;
 695         len -= off;
 696         if (len > count)
 697                 len = count;
 698         if (len < 0)
 699                 len = 0;
 700
 701         return len;
 702 }
 703
 704 static int dispatch_procfs_write(struct file *file,
 705                         const char __user *userbuf,
 706                         unsigned long count, void *data)
 707 {
 708         struct ibm_struct *ibm = data;
 709         char *kernbuf;
 710         int ret;
 711
 712         if (!ibm || !ibm->write)
 713                 return -EINVAL;
 714
 715         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 716         if (!kernbuf)
 717                 return -ENOMEM;
 718
 719         if (copy_from_user(kernbuf, userbuf, count)) {
 720                 kfree(kernbuf);
 721                 return -EFAULT;
 722         }
 723
 724         kernbuf[count] = 0;
 725         strcat(kernbuf, ",");
 726         ret = ibm->write(kernbuf);
 727         if (ret == 0)
 728                 ret = count;
 729
 730         kfree(kernbuf);
 731
 732         return ret;
 733 }
 734
 735 static char *next_cmd(char **cmds)
 736 {
 737         char *start = *cmds;
 738         char *end;
 739
 740         while ((end = strchr(start, ',')) && end == start)
 741                 start = end + 1;
 742
 743         if (!end)
 744                 return NULL;
 745
 746         *end = 0;
 747         *cmds = end + 1;
 748         return start;
 749 }
 750
 751
 752 /****************************************************************************
 753  ****************************************************************************
 754  *
 755  * Device model: input, hwmon and platform
 756  *
 757  ****************************************************************************
 758  ****************************************************************************/
 759
 760 static struct platform_device *tpacpi_pdev;
 761 static struct platform_device *tpacpi_sensors_pdev;
 762 static struct device *tpacpi_hwmon;
 763 static struct input_dev *tpacpi_inputdev;
 764 static struct mutex tpacpi_inputdev_send_mutex;
 765 static LIST_HEAD(tpacpi_all_drivers);
 766
 767 static int tpacpi_suspend_handler(struct platform_device *pdev,
 768                                   pm_message_t state)
 769 {
 770         struct ibm_struct *ibm, *itmp;
 771
 772         list_for_each_entry_safe(ibm, itmp,
 773                                  &tpacpi_all_drivers,
 774                                  all_drivers) {
 775                 if (ibm->suspend)
 776                         (ibm->suspend)(state);
 777         }
 778
 779         return 0;
 780 }
 781
 782 static int tpacpi_resume_handler(struct platform_device *pdev)
 783 {
 784         struct ibm_struct *ibm, *itmp;
 785
 786         list_for_each_entry_safe(ibm, itmp,
 787                                  &tpacpi_all_drivers,
 788                                  all_drivers) {
 789                 if (ibm->resume)
 790                         (ibm->resume)();
 791         }
 792
 793         return 0;
 794 }
 795
 796 static void tpacpi_shutdown_handler(struct platform_device *pdev)
 797 {
 798         struct ibm_struct *ibm, *itmp;
 799
 800         list_for_each_entry_safe(ibm, itmp,
 801                                  &tpacpi_all_drivers,
 802                                  all_drivers) {
 803                 if (ibm->shutdown)
 804                         (ibm->shutdown)();
 805         }
 806 }
 807
 808 static struct platform_driver tpacpi_pdriver = {
 809         .driver = {
 810                 .name = TPACPI_DRVR_NAME,
 811                 .owner = THIS_MODULE,
 812         },
 813         .suspend = tpacpi_suspend_handler,
 814         .resume = tpacpi_resume_handler,
 815         .shutdown = tpacpi_shutdown_handler,
 816 };
 817
 818 static struct platform_driver tpacpi_hwmon_pdriver = {
 819         .driver = {
 820                 .name = TPACPI_HWMON_DRVR_NAME,
 821                 .owner = THIS_MODULE,
 822         },
 823 };
 824
 825 /*************************************************************************
 826  * sysfs support helpers
 827  */
 828
 829 struct attribute_set {
 830         unsigned int members, max_members;
 831         struct attribute_group group;
 832 };
 833
 834 struct attribute_set_obj {
 835         struct attribute_set s;
 836         struct attribute *a;
 837 } __attribute__((packed));
 838
 839 static struct attribute_set *create_attr_set(unsigned int max_members,
 840                                                 const char *name)
 841 {
 842         struct attribute_set_obj *sobj;
 843
 844         if (max_members == 0)
 845                 return NULL;
 846
 847         /* Allocates space for implicit NULL at the end too */
 848         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 849                     max_members * sizeof(struct attribute *),
 850                     GFP_KERNEL);
 851         if (!sobj)
 852                 return NULL;
 853         sobj->s.max_members = max_members;
 854         sobj->s.group.attrs = &sobj->a;
 855         sobj->s.group.name = name;
 856
 857         return &sobj->s;
 858 }
 859
 860 #define destroy_attr_set(_set) \
 861         kfree(_set);
 862
 863 /* not multi-threaded safe, use it in a single thread per set */
 864 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 865 {
 866         if (!s || !attr)
 867                 return -EINVAL;
 868
 869         if (s->members >= s->max_members)
 870                 return -ENOMEM;
 871
 872         s->group.attrs[s->members] = attr;
 873         s->members++;
 874
 875         return 0;
 876 }
 877
 878 static int add_many_to_attr_set(struct attribute_set *s,
 879                         struct attribute **attr,
 880                         unsigned int count)
 881 {
 882         int i, res;
 883
 884         for (i = 0; i < count; i++) {
 885                 res = add_to_attr_set(s, attr[i]);
 886                 if (res)
 887                         return res;
 888         }
 889
 890         return 0;
 891 }
 892
 893 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 894 {
 895         sysfs_remove_group(kobj, &s->group);
 896         destroy_attr_set(s);
 897 }
 898
 899 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 900         sysfs_create_group(_kobj, &_attr_set->group)
 901
 902 static int parse_strtoul(const char *buf,
 903                 unsigned long max, unsigned long *value)
 904 {
 905         char *endp;
 906
 907         while (*buf && isspace(*buf))
 908                 buf++;
 909         *value = simple_strtoul(buf, &endp, 0);
 910         while (*endp && isspace(*endp))
 911                 endp++;
 912         if (*endp || *value > max)
 913                 return -EINVAL;
 914
 915         return 0;
 916 }
 917
 918 static void tpacpi_disable_brightness_delay(void)
 919 {
 920         if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0))
 921                 printk(TPACPI_NOTICE
 922                         "ACPI backlight control delay disabled\n");
 923 }
 924
 925 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 926 {
 927         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 928         union acpi_object *obj;
 929         int rc;
 930
 931         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 932                 obj = (union acpi_object *)buffer.pointer;
 933                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 934                         printk(TPACPI_ERR "Unknown _BCL data, "
 935                                "please report this to %s\n", TPACPI_MAIL);
 936                         rc = 0;
 937                 } else {
 938                         rc = obj->package.count;
 939                 }
 940         } else {
 941                 return 0;
 942         }
 943
 944         kfree(buffer.pointer);
 945         return rc;
 946 }
 947
 948 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 949                                         u32 lvl, void *context, void **rv)
 950 {
 951         char name[ACPI_PATH_SEGMENT_LENGTH];
 952         struct acpi_buffer buffer = { sizeof(name), &name };
 953
 954         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 955             !strncmp("_BCL", name, sizeof(name) - 1)) {
 956                 BUG_ON(!rv || !*rv);
 957                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 958                 return AE_CTRL_TERMINATE;
 959         } else {
 960                 return AE_OK;
 961         }
 962 }
 963
 964 /*
 965  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 966  */
 967 static int __init tpacpi_check_std_acpi_brightness_support(void)
 968 {
 969         int status;
 970         int bcl_levels = 0;
 971         void *bcl_ptr = &bcl_levels;
 972
 973         if (!vid_handle) {
 974                 TPACPI_ACPIHANDLE_INIT(vid);
 975         }
 976         if (!vid_handle)
 977                 return 0;
 978
 979         /*
 980          * Search for a _BCL method, and execute it.  This is safe on all
 981          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 982          * BIOS in ACPI backlight control mode.  We do NOT have to care
 983          * about calling the _BCL method in an enabled video device, any
 984          * will do for our purposes.
 985          */
 986
 987         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 988                                      tpacpi_acpi_walk_find_bcl, NULL,
 989                                      &bcl_ptr);
 990
 991         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 992                 tp_features.bright_acpimode = 1;
 993                 return (bcl_levels - 2);
 994         }
 995
 996         return 0;
 997 }
 998
 999 static int __init tpacpi_new_rfkill(const unsigned int id,
1000                         struct rfkill **rfk,
1001                         const enum rfkill_type rfktype,
1002                         const char *name,
1003                         const bool set_default,
1004                         int (*toggle_radio)(void *, enum rfkill_state),
1005                         int (*get_state)(void *, enum rfkill_state *))
1006 {
1007         int res;
1008         enum rfkill_state initial_state = RFKILL_STATE_SOFT_BLOCKED;
1009
1010         res = get_state(NULL, &initial_state);
1011         if (res < 0) {
1012                 printk(TPACPI_ERR
1013                         "failed to read initial state for %s, error %d; "
1014                         "will turn radio off\n", name, res);
1015         } else if (set_default) {
1016                 /* try to set the initial state as the default for the rfkill
1017                  * type, since we ask the firmware to preserve it across S5 in
1018                  * NVRAM */
1019                 rfkill_set_default(rfktype,
1020                                 (initial_state == RFKILL_STATE_UNBLOCKED) ?
1021                                         RFKILL_STATE_UNBLOCKED :
1022                                         RFKILL_STATE_SOFT_BLOCKED);
1023         }
1024
1025         *rfk = rfkill_allocate(&tpacpi_pdev->dev, rfktype);
1026         if (!*rfk) {
1027                 printk(TPACPI_ERR
1028                         "failed to allocate memory for rfkill class\n");
1029                 return -ENOMEM;
1030         }
1031
1032         (*rfk)->name = name;
1033         (*rfk)->get_state = get_state;
1034         (*rfk)->toggle_radio = toggle_radio;
1035         (*rfk)->state = initial_state;
1036
1037         res = rfkill_register(*rfk);
1038         if (res < 0) {
1039                 printk(TPACPI_ERR
1040                         "failed to register %s rfkill switch: %d\n",
1041                         name, res);
1042                 rfkill_free(*rfk);
1043                 *rfk = NULL;
1044                 return res;
1045         }
1046
1047         return 0;
1048 }
1049
1050 static void printk_deprecated_attribute(const char * const what,
1051                                         const char * const details)
1052 {
1053         tpacpi_log_usertask("deprecated sysfs attribute");
1054         printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and "
1055                 "will be removed. %s\n",
1056                 what, details);
1057 }
1058
1059 static void printk_deprecated_rfkill_attribute(const char * const what)
1060 {
1061         printk_deprecated_attribute(what,
1062                         "Please switch to generic rfkill before year 2010");
1063 }
1064
1065 /*************************************************************************
1066  * thinkpad-acpi driver attributes
1067  */
1068
1069 /* interface_version --------------------------------------------------- */
1070 static ssize_t tpacpi_driver_interface_version_show(
1071                                 struct device_driver *drv,
1072                                 char *buf)
1073 {
1074         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
1075 }
1076
1077 static DRIVER_ATTR(interface_version, S_IRUGO,
1078                 tpacpi_driver_interface_version_show, NULL);
1079
1080 /* debug_level --------------------------------------------------------- */
1081 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
1082                                                 char *buf)
1083 {
1084         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
1085 }
1086
1087 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
1088                                                 const char *buf, size_t count)
1089 {
1090         unsigned long t;
1091
1092         if (parse_strtoul(buf, 0xffff, &t))
1093                 return -EINVAL;
1094
1095         dbg_level = t;
1096
1097         return count;
1098 }
1099
1100 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
1101                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
1102
1103 /* version ------------------------------------------------------------- */
1104 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
1105                                                 char *buf)
1106 {
1107         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
1108                         TPACPI_DESC, TPACPI_VERSION);
1109 }
1110
1111 static DRIVER_ATTR(version, S_IRUGO,
1112                 tpacpi_driver_version_show, NULL);
1113
1114 /* --------------------------------------------------------------------- */
1115
1116 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1117
1118 static void tpacpi_send_radiosw_update(void);
1119
1120 /* wlsw_emulstate ------------------------------------------------------ */
1121 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv,
1122                                                 char *buf)
1123 {
1124         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate);
1125 }
1126
1127 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv,
1128                                                 const char *buf, size_t count)
1129 {
1130         unsigned long t;
1131
1132         if (parse_strtoul(buf, 1, &t))
1133                 return -EINVAL;
1134
1135         if (tpacpi_wlsw_emulstate != t) {
1136                 tpacpi_wlsw_emulstate = !!t;
1137                 tpacpi_send_radiosw_update();
1138         } else
1139                 tpacpi_wlsw_emulstate = !!t;
1140
1141         return count;
1142 }
1143
1144 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO,
1145                 tpacpi_driver_wlsw_emulstate_show,
1146                 tpacpi_driver_wlsw_emulstate_store);
1147
1148 /* bluetooth_emulstate ------------------------------------------------- */
1149 static ssize_t tpacpi_driver_bluetooth_emulstate_show(
1150                                         struct device_driver *drv,
1151                                         char *buf)
1152 {
1153         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate);
1154 }
1155
1156 static ssize_t tpacpi_driver_bluetooth_emulstate_store(
1157                                         struct device_driver *drv,
1158                                         const char *buf, size_t count)
1159 {
1160         unsigned long t;
1161
1162         if (parse_strtoul(buf, 1, &t))
1163                 return -EINVAL;
1164
1165         tpacpi_bluetooth_emulstate = !!t;
1166
1167         return count;
1168 }
1169
1170 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO,
1171                 tpacpi_driver_bluetooth_emulstate_show,
1172                 tpacpi_driver_bluetooth_emulstate_store);
1173
1174 /* wwan_emulstate ------------------------------------------------- */
1175 static ssize_t tpacpi_driver_wwan_emulstate_show(
1176                                         struct device_driver *drv,
1177                                         char *buf)
1178 {
1179         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate);
1180 }
1181
1182 static ssize_t tpacpi_driver_wwan_emulstate_store(
1183                                         struct device_driver *drv,
1184                                         const char *buf, size_t count)
1185 {
1186         unsigned long t;
1187
1188         if (parse_strtoul(buf, 1, &t))
1189                 return -EINVAL;
1190
1191         tpacpi_wwan_emulstate = !!t;
1192
1193         return count;
1194 }
1195
1196 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO,
1197                 tpacpi_driver_wwan_emulstate_show,
1198                 tpacpi_driver_wwan_emulstate_store);
1199
1200 /* uwb_emulstate ------------------------------------------------- */
1201 static ssize_t tpacpi_driver_uwb_emulstate_show(
1202                                         struct device_driver *drv,
1203                                         char *buf)
1204 {
1205         return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate);
1206 }
1207
1208 static ssize_t tpacpi_driver_uwb_emulstate_store(
1209                                         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         tpacpi_uwb_emulstate = !!t;
1218
1219         return count;
1220 }
1221
1222 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO,
1223                 tpacpi_driver_uwb_emulstate_show,
1224                 tpacpi_driver_uwb_emulstate_store);
1225 #endif
1226
1227 /* --------------------------------------------------------------------- */
1228
1229 static struct driver_attribute *tpacpi_driver_attributes[] = {
1230         &driver_attr_debug_level, &driver_attr_version,
1231         &driver_attr_interface_version,
1232 };
1233
1234 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
1235 {
1236         int i, res;
1237
1238         i = 0;
1239         res = 0;
1240         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
1241                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
1242                 i++;
1243         }
1244
1245 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1246         if (!res && dbg_wlswemul)
1247                 res = driver_create_file(drv, &driver_attr_wlsw_emulstate);
1248         if (!res && dbg_bluetoothemul)
1249                 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate);
1250         if (!res && dbg_wwanemul)
1251                 res = driver_create_file(drv, &driver_attr_wwan_emulstate);
1252         if (!res && dbg_uwbemul)
1253                 res = driver_create_file(drv, &driver_attr_uwb_emulstate);
1254 #endif
1255
1256         return res;
1257 }
1258
1259 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
1260 {
1261         int i;
1262
1263         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
1264                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
1265
1266 #ifdef THINKPAD_ACPI_DEBUGFACILITIES
1267         driver_remove_file(drv, &driver_attr_wlsw_emulstate);
1268         driver_remove_file(drv, &driver_attr_bluetooth_emulstate);
1269         driver_remove_file(drv, &driver_attr_wwan_emulstate);
1270         driver_remove_file(drv, &driver_attr_uwb_emulstate);
1271 #endif
1272 }
1273
1274 /****************************************************************************
1275  ****************************************************************************
1276  *
1277  * Subdrivers
1278  *
1279  ****************************************************************************
1280  ****************************************************************************/
1281
1282 /*************************************************************************
1283  * thinkpad-acpi init subdriver
1284  */
1285
1286 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
1287 {
1288         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1289         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1290
1291         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1292                 (thinkpad_id.bios_version_str) ?
1293                         thinkpad_id.bios_version_str : "unknown",
1294                 (thinkpad_id.ec_version_str) ?
1295                         thinkpad_id.ec_version_str : "unknown");
1296
1297         if (thinkpad_id.vendor && thinkpad_id.model_str)
1298                 printk(TPACPI_INFO "%s %s, model %s\n",
1299                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1300                                 "IBM" : ((thinkpad_id.vendor ==
1301                                                 PCI_VENDOR_ID_LENOVO) ?
1302                                         "Lenovo" : "Unknown vendor"),
1303                         thinkpad_id.model_str,
1304                         (thinkpad_id.nummodel_str) ?
1305                                 thinkpad_id.nummodel_str : "unknown");
1306
1307         return 0;
1308 }
1309
1310 static int thinkpad_acpi_driver_read(char *p)
1311 {
1312         int len = 0;
1313
1314         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1315         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1316
1317         return len;
1318 }
1319
1320 static struct ibm_struct thinkpad_acpi_driver_data = {
1321         .name = "driver",
1322         .read = thinkpad_acpi_driver_read,
1323 };
1324
1325 /*************************************************************************
1326  * Hotkey subdriver
1327  */
1328
1329 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1330         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1331         TP_ACPI_HOTKEYSCAN_FNF2,
1332         TP_ACPI_HOTKEYSCAN_FNF3,
1333         TP_ACPI_HOTKEYSCAN_FNF4,
1334         TP_ACPI_HOTKEYSCAN_FNF5,
1335         TP_ACPI_HOTKEYSCAN_FNF6,
1336         TP_ACPI_HOTKEYSCAN_FNF7,
1337         TP_ACPI_HOTKEYSCAN_FNF8,
1338         TP_ACPI_HOTKEYSCAN_FNF9,
1339         TP_ACPI_HOTKEYSCAN_FNF10,
1340         TP_ACPI_HOTKEYSCAN_FNF11,
1341         TP_ACPI_HOTKEYSCAN_FNF12,
1342         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1343         TP_ACPI_HOTKEYSCAN_FNINSERT,
1344         TP_ACPI_HOTKEYSCAN_FNDELETE,
1345         TP_ACPI_HOTKEYSCAN_FNHOME,
1346         TP_ACPI_HOTKEYSCAN_FNEND,
1347         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1348         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1349         TP_ACPI_HOTKEYSCAN_FNSPACE,
1350         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1351         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1352         TP_ACPI_HOTKEYSCAN_MUTE,
1353         TP_ACPI_HOTKEYSCAN_THINKPAD,
1354 };
1355
1356 enum {  /* Keys available through NVRAM polling */
1357         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1358         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1359 };
1360
1361 enum {  /* Positions of some of the keys in hotkey masks */
1362         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1363         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1364         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1365         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1366         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1367         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1368         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1369         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1370         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1371         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1372         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1373 };
1374
1375 enum {  /* NVRAM to ACPI HKEY group map */
1376         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1377                                           TP_ACPI_HKEY_ZOOM_MASK |
1378                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1379                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1380         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1381                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1382         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1383                                           TP_ACPI_HKEY_VOLDWN_MASK |
1384                                           TP_ACPI_HKEY_MUTE_MASK,
1385 };
1386
1387 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1388 struct tp_nvram_state {
1389        u16 thinkpad_toggle:1;
1390        u16 zoom_toggle:1;
1391        u16 display_toggle:1;
1392        u16 thinklight_toggle:1;
1393        u16 hibernate_toggle:1;
1394        u16 displayexp_toggle:1;
1395        u16 display_state:1;
1396        u16 brightness_toggle:1;
1397        u16 volume_toggle:1;
1398        u16 mute:1;
1399
1400        u8 brightness_level;
1401        u8 volume_level;
1402 };
1403
1404 static struct task_struct *tpacpi_hotkey_task;
1405 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1406 static int hotkey_poll_freq = 10;       /* Hz */
1407 static struct mutex hotkey_thread_mutex;
1408 static struct mutex hotkey_thread_data_mutex;
1409 static unsigned int hotkey_config_change;
1410
1411 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1412
1413 #define hotkey_source_mask 0U
1414
1415 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1416
1417 static struct mutex hotkey_mutex;
1418
1419 static enum {   /* Reasons for waking up */
1420         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1421         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1422         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1423 } hotkey_wakeup_reason;
1424
1425 static int hotkey_autosleep_ack;
1426
1427 static u32 hotkey_orig_mask;
1428 static u32 hotkey_all_mask;
1429 static u32 hotkey_reserved_mask;
1430 static u32 hotkey_mask;
1431
1432 static unsigned int hotkey_report_mode;
1433
1434 static u16 *hotkey_keycode_map;
1435
1436 static struct attribute_set *hotkey_dev_attributes;
1437
1438 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1439 #define HOTKEY_CONFIG_CRITICAL_START \
1440         do { \
1441                 mutex_lock(&hotkey_thread_data_mutex); \
1442                 hotkey_config_change++; \
1443         } while (0);
1444 #define HOTKEY_CONFIG_CRITICAL_END \
1445         mutex_unlock(&hotkey_thread_data_mutex);
1446 #else
1447 #define HOTKEY_CONFIG_CRITICAL_START
1448 #define HOTKEY_CONFIG_CRITICAL_END
1449 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1450
1451 /* HKEY.MHKG() return bits */
1452 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1453
1454 static int hotkey_get_wlsw(int *status)
1455 {
1456 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
1457         if (dbg_wlswemul) {
1458                 *status = !!tpacpi_wlsw_emulstate;
1459                 return 0;
1460         }
1461 #endif
1462         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1463                 return -EIO;
1464         return 0;
1465 }
1466
1467 static int hotkey_get_tablet_mode(int *status)
1468 {
1469         int s;
1470
1471         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1472                 return -EIO;
1473
1474         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1475         return 0;
1476 }
1477
1478 /*
1479  * Call with hotkey_mutex held
1480  */
1481 static int hotkey_mask_get(void)
1482 {
1483         u32 m = 0;
1484
1485         if (tp_features.hotkey_mask) {
1486                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1487                         return -EIO;
1488         }
1489         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1490
1491         return 0;
1492 }
1493
1494 /*
1495  * Call with hotkey_mutex held
1496  */
1497 static int hotkey_mask_set(u32 mask)
1498 {
1499         int i;
1500         int rc = 0;
1501
1502         if (tp_features.hotkey_mask) {
1503                 if (!tp_warned.hotkey_mask_ff &&
1504                     (mask == 0xffff || mask == 0xffffff ||
1505                      mask == 0xffffffff)) {
1506                         tp_warned.hotkey_mask_ff = 1;
1507                         printk(TPACPI_NOTICE
1508                                "setting the hotkey mask to 0x%08x is likely "
1509                                "not the best way to go about it\n", mask);
1510                         printk(TPACPI_NOTICE
1511                                "please consider using the driver defaults, "
1512                                "and refer to up-to-date thinkpad-acpi "
1513                                "documentation\n");
1514                 }
1515
1516                 HOTKEY_CONFIG_CRITICAL_START
1517                 for (i = 0; i < 32; i++) {
1518                         u32 m = 1 << i;
1519                         /* enable in firmware mask only keys not in NVRAM
1520                          * mode, but enable the key in the cached hotkey_mask
1521                          * regardless of mode, or the key will end up
1522                          * disabled by hotkey_mask_get() */
1523                         if (!acpi_evalf(hkey_handle,
1524                                         NULL, "MHKM", "vdd", i + 1,
1525                                         !!((mask & ~hotkey_source_mask) & m))) {
1526                                 rc = -EIO;
1527                                 break;
1528                         } else {
1529                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1530                         }
1531                 }
1532                 HOTKEY_CONFIG_CRITICAL_END
1533
1534                 /* hotkey_mask_get must be called unconditionally below */
1535                 if (!hotkey_mask_get() && !rc &&
1536                     (hotkey_mask & ~hotkey_source_mask) !=
1537                      (mask & ~hotkey_source_mask)) {
1538                         printk(TPACPI_NOTICE
1539                                "requested hot key mask 0x%08x, but "
1540                                "firmware forced it to 0x%08x\n",
1541                                mask, hotkey_mask);
1542                 }
1543         } else {
1544 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1545                 HOTKEY_CONFIG_CRITICAL_START
1546                 hotkey_mask = mask & hotkey_source_mask;
1547                 HOTKEY_CONFIG_CRITICAL_END
1548                 hotkey_mask_get();
1549                 if (hotkey_mask != mask) {
1550                         printk(TPACPI_NOTICE
1551                                "requested hot key mask 0x%08x, "
1552                                "forced to 0x%08x (NVRAM poll mask is "
1553                                "0x%08x): no firmware mask support\n",
1554                                mask, hotkey_mask, hotkey_source_mask);
1555                 }
1556 #else
1557                 hotkey_mask_get();
1558                 rc = -ENXIO;
1559 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1560         }
1561
1562         return rc;
1563 }
1564
1565 static int hotkey_status_get(int *status)
1566 {
1567         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1568                 return -EIO;
1569
1570         return 0;
1571 }
1572
1573 static int hotkey_status_set(bool enable)
1574 {
1575         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0))
1576                 return -EIO;
1577
1578         return 0;
1579 }
1580
1581 static void tpacpi_input_send_tabletsw(void)
1582 {
1583         int state;
1584
1585         if (tp_features.hotkey_tablet &&
1586             !hotkey_get_tablet_mode(&state)) {
1587                 mutex_lock(&tpacpi_inputdev_send_mutex);
1588
1589                 input_report_switch(tpacpi_inputdev,
1590                                     SW_TABLET_MODE, !!state);
1591                 input_sync(tpacpi_inputdev);
1592
1593                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1594         }
1595 }
1596
1597 static void tpacpi_input_send_key(unsigned int scancode)
1598 {
1599         unsigned int keycode;
1600
1601         keycode = hotkey_keycode_map[scancode];
1602
1603         if (keycode != KEY_RESERVED) {
1604                 mutex_lock(&tpacpi_inputdev_send_mutex);
1605
1606                 input_report_key(tpacpi_inputdev, keycode, 1);
1607                 if (keycode == KEY_UNKNOWN)
1608                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1609                                     scancode);
1610                 input_sync(tpacpi_inputdev);
1611
1612                 input_report_key(tpacpi_inputdev, keycode, 0);
1613                 if (keycode == KEY_UNKNOWN)
1614                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1615                                     scancode);
1616                 input_sync(tpacpi_inputdev);
1617
1618                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1619         }
1620 }
1621
1622 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1623 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1624
1625 static void tpacpi_hotkey_send_key(unsigned int scancode)
1626 {
1627         tpacpi_input_send_key(scancode);
1628         if (hotkey_report_mode < 2) {
1629                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1630                                                 0x80, 0x1001 + scancode);
1631         }
1632 }
1633
1634 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1635 {
1636         u8 d;
1637
1638         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1639                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1640                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1641                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1642                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1643                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1644         }
1645         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1646                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1647                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1648         }
1649         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1650                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1651                 n->displayexp_toggle =
1652                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1653         }
1654         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1655                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1656                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1657                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1658                 n->brightness_toggle =
1659                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1660         }
1661         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1662                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1663                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1664                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1665                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1666                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1667         }
1668 }
1669
1670 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1671         do { \
1672                 if ((mask & (1 << __scancode)) && \
1673                     oldn->__member != newn->__member) \
1674                 tpacpi_hotkey_send_key(__scancode); \
1675         } while (0)
1676
1677 #define TPACPI_MAY_SEND_KEY(__scancode) \
1678         do { if (mask & (1 << __scancode)) \
1679                 tpacpi_hotkey_send_key(__scancode); } while (0)
1680
1681 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1682                                            struct tp_nvram_state *newn,
1683                                            u32 mask)
1684 {
1685         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1686         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1687         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1688         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1689
1690         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1691
1692         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1693
1694         /* handle volume */
1695         if (oldn->volume_toggle != newn->volume_toggle) {
1696                 if (oldn->mute != newn->mute) {
1697                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1698                 }
1699                 if (oldn->volume_level > newn->volume_level) {
1700                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1701                 } else if (oldn->volume_level < newn->volume_level) {
1702                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1703                 } else if (oldn->mute == newn->mute) {
1704                         /* repeated key presses that didn't change state */
1705                         if (newn->mute) {
1706                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1707                         } else if (newn->volume_level != 0) {
1708                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1709                         } else {
1710                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1711                         }
1712                 }
1713         }
1714
1715         /* handle brightness */
1716         if (oldn->brightness_toggle != newn->brightness_toggle) {
1717                 if (oldn->brightness_level < newn->brightness_level) {
1718                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1719                 } else if (oldn->brightness_level > newn->brightness_level) {
1720                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1721                 } else {
1722                         /* repeated key presses that didn't change state */
1723                         if (newn->brightness_level != 0) {
1724                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1725                         } else {
1726                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1727                         }
1728                 }
1729         }
1730 }
1731
1732 #undef TPACPI_COMPARE_KEY
1733 #undef TPACPI_MAY_SEND_KEY
1734
1735 static int hotkey_kthread(void *data)
1736 {
1737         struct tp_nvram_state s[2];
1738         u32 mask;
1739         unsigned int si, so;
1740         unsigned long t;
1741         unsigned int change_detector, must_reset;
1742
1743         mutex_lock(&hotkey_thread_mutex);
1744
1745         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1746                 goto exit;
1747
1748         set_freezable();
1749
1750         so = 0;
1751         si = 1;
1752         t = 0;
1753
1754         /* Initial state for compares */
1755         mutex_lock(&hotkey_thread_data_mutex);
1756         change_detector = hotkey_config_change;
1757         mask = hotkey_source_mask & hotkey_mask;
1758         mutex_unlock(&hotkey_thread_data_mutex);
1759         hotkey_read_nvram(&s[so], mask);
1760
1761         while (!kthread_should_stop() && hotkey_poll_freq) {
1762                 if (t == 0)
1763                         t = 1000/hotkey_poll_freq;
1764                 t = msleep_interruptible(t);
1765                 if (unlikely(kthread_should_stop()))
1766                         break;
1767                 must_reset = try_to_freeze();
1768                 if (t > 0 && !must_reset)
1769                         continue;
1770
1771                 mutex_lock(&hotkey_thread_data_mutex);
1772                 if (must_reset || hotkey_config_change != change_detector) {
1773                         /* forget old state on thaw or config change */
1774                         si = so;
1775                         t = 0;
1776                         change_detector = hotkey_config_change;
1777                 }
1778                 mask = hotkey_source_mask & hotkey_mask;
1779                 mutex_unlock(&hotkey_thread_data_mutex);
1780
1781                 if (likely(mask)) {
1782                         hotkey_read_nvram(&s[si], mask);
1783                         if (likely(si != so)) {
1784                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1785                                                                 mask);
1786                         }
1787                 }
1788
1789                 so = si;
1790                 si ^= 1;
1791         }
1792
1793 exit:
1794         mutex_unlock(&hotkey_thread_mutex);
1795         return 0;
1796 }
1797
1798 static void hotkey_poll_stop_sync(void)
1799 {
1800         if (tpacpi_hotkey_task) {
1801                 if (frozen(tpacpi_hotkey_task) ||
1802                     freezing(tpacpi_hotkey_task))
1803                         thaw_process(tpacpi_hotkey_task);
1804
1805                 kthread_stop(tpacpi_hotkey_task);
1806                 tpacpi_hotkey_task = NULL;
1807                 mutex_lock(&hotkey_thread_mutex);
1808                 /* at this point, the thread did exit */
1809                 mutex_unlock(&hotkey_thread_mutex);
1810         }
1811 }
1812
1813 /* call with hotkey_mutex held */
1814 static void hotkey_poll_setup(int may_warn)
1815 {
1816         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1817             hotkey_poll_freq > 0 &&
1818             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1819                 if (!tpacpi_hotkey_task) {
1820                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1821                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1822                         if (IS_ERR(tpacpi_hotkey_task)) {
1823                                 tpacpi_hotkey_task = NULL;
1824                                 printk(TPACPI_ERR
1825                                        "could not create kernel thread "
1826                                        "for hotkey polling\n");
1827                         }
1828                 }
1829         } else {
1830                 hotkey_poll_stop_sync();
1831                 if (may_warn &&
1832                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1833                         printk(TPACPI_NOTICE
1834                                 "hot keys 0x%08x require polling, "
1835                                 "which is currently disabled\n",
1836                                 hotkey_source_mask);
1837                 }
1838         }
1839 }
1840
1841 static void hotkey_poll_setup_safe(int may_warn)
1842 {
1843         mutex_lock(&hotkey_mutex);
1844         hotkey_poll_setup(may_warn);
1845         mutex_unlock(&hotkey_mutex);
1846 }
1847
1848 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1849
1850 static void hotkey_poll_setup_safe(int __unused)
1851 {
1852 }
1853
1854 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1855
1856 static int hotkey_inputdev_open(struct input_dev *dev)
1857 {
1858         switch (tpacpi_lifecycle) {
1859         case TPACPI_LIFE_INIT:
1860                 /*
1861                  * hotkey_init will call hotkey_poll_setup_safe
1862                  * at the appropriate moment
1863                  */
1864                 return 0;
1865         case TPACPI_LIFE_EXITING:
1866                 return -EBUSY;
1867         case TPACPI_LIFE_RUNNING:
1868                 hotkey_poll_setup_safe(0);
1869                 return 0;
1870         }
1871
1872         /* Should only happen if tpacpi_lifecycle is corrupt */
1873         BUG();
1874         return -EBUSY;
1875 }
1876
1877 static void hotkey_inputdev_close(struct input_dev *dev)
1878 {
1879         /* disable hotkey polling when possible */
1880         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1881                 hotkey_poll_setup_safe(0);
1882 }
1883
1884 /* sysfs hotkey enable ------------------------------------------------- */
1885 static ssize_t hotkey_enable_show(struct device *dev,
1886                            struct device_attribute *attr,
1887                            char *buf)
1888 {
1889         int res, status;
1890
1891         printk_deprecated_attribute("hotkey_enable",
1892                         "Hotkey reporting is always enabled");
1893
1894         res = hotkey_status_get(&status);
1895         if (res)
1896                 return res;
1897
1898         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1899 }
1900
1901 static ssize_t hotkey_enable_store(struct device *dev,
1902                             struct device_attribute *attr,
1903                             const char *buf, size_t count)
1904 {
1905         unsigned long t;
1906
1907         printk_deprecated_attribute("hotkey_enable",
1908                         "Hotkeys can be disabled through hotkey_mask");
1909
1910         if (parse_strtoul(buf, 1, &t))
1911                 return -EINVAL;
1912
1913         if (t == 0)
1914                 return -EPERM;
1915
1916         return count;
1917 }
1918
1919 static struct device_attribute dev_attr_hotkey_enable =
1920         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1921                 hotkey_enable_show, hotkey_enable_store);
1922
1923 /* sysfs hotkey mask --------------------------------------------------- */
1924 static ssize_t hotkey_mask_show(struct device *dev,
1925                            struct device_attribute *attr,
1926                            char *buf)
1927 {
1928         int res;
1929
1930         if (mutex_lock_killable(&hotkey_mutex))
1931                 return -ERESTARTSYS;
1932         res = hotkey_mask_get();
1933         mutex_unlock(&hotkey_mutex);
1934
1935         return (res)?
1936                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1937 }
1938
1939 static ssize_t hotkey_mask_store(struct device *dev,
1940                             struct device_attribute *attr,
1941                             const char *buf, size_t count)
1942 {
1943         unsigned long t;
1944         int res;
1945
1946         if (parse_strtoul(buf, 0xffffffffUL, &t))
1947                 return -EINVAL;
1948
1949         if (mutex_lock_killable(&hotkey_mutex))
1950                 return -ERESTARTSYS;
1951
1952         res = hotkey_mask_set(t);
1953
1954 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1955         hotkey_poll_setup(1);
1956 #endif
1957
1958         mutex_unlock(&hotkey_mutex);
1959
1960         return (res) ? res : count;
1961 }
1962
1963 static struct device_attribute dev_attr_hotkey_mask =
1964         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1965                 hotkey_mask_show, hotkey_mask_store);
1966
1967 /* sysfs hotkey bios_enabled ------------------------------------------- */
1968 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1969                            struct device_attribute *attr,
1970                            char *buf)
1971 {
1972         return sprintf(buf, "0\n");
1973 }
1974
1975 static struct device_attribute dev_attr_hotkey_bios_enabled =
1976         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1977
1978 /* sysfs hotkey bios_mask ---------------------------------------------- */
1979 static ssize_t hotkey_bios_mask_show(struct device *dev,
1980                            struct device_attribute *attr,
1981                            char *buf)
1982 {
1983         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1984 }
1985
1986 static struct device_attribute dev_attr_hotkey_bios_mask =
1987         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1988
1989 /* sysfs hotkey all_mask ----------------------------------------------- */
1990 static ssize_t hotkey_all_mask_show(struct device *dev,
1991                            struct device_attribute *attr,
1992                            char *buf)
1993 {
1994         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1995                                 hotkey_all_mask | hotkey_source_mask);
1996 }
1997
1998 static struct device_attribute dev_attr_hotkey_all_mask =
1999         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
2000
2001 /* sysfs hotkey recommended_mask --------------------------------------- */
2002 static ssize_t hotkey_recommended_mask_show(struct device *dev,
2003                                             struct device_attribute *attr,
2004                                             char *buf)
2005 {
2006         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
2007                         (hotkey_all_mask | hotkey_source_mask)
2008                         & ~hotkey_reserved_mask);
2009 }
2010
2011 static struct device_attribute dev_attr_hotkey_recommended_mask =
2012         __ATTR(hotkey_recommended_mask, S_IRUGO,
2013                 hotkey_recommended_mask_show, NULL);
2014
2015 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2016
2017 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
2018 static ssize_t hotkey_source_mask_show(struct device *dev,
2019                            struct device_attribute *attr,
2020                            char *buf)
2021 {
2022         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
2023 }
2024
2025 static ssize_t hotkey_source_mask_store(struct device *dev,
2026                             struct device_attribute *attr,
2027                             const char *buf, size_t count)
2028 {
2029         unsigned long t;
2030
2031         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
2032                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
2033                 return -EINVAL;
2034
2035         if (mutex_lock_killable(&hotkey_mutex))
2036                 return -ERESTARTSYS;
2037
2038         HOTKEY_CONFIG_CRITICAL_START
2039         hotkey_source_mask = t;
2040         HOTKEY_CONFIG_CRITICAL_END
2041
2042         hotkey_poll_setup(1);
2043
2044         mutex_unlock(&hotkey_mutex);
2045
2046         return count;
2047 }
2048
2049 static struct device_attribute dev_attr_hotkey_source_mask =
2050         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
2051                 hotkey_source_mask_show, hotkey_source_mask_store);
2052
2053 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
2054 static ssize_t hotkey_poll_freq_show(struct device *dev,
2055                            struct device_attribute *attr,
2056                            char *buf)
2057 {
2058         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
2059 }
2060
2061 static ssize_t hotkey_poll_freq_store(struct device *dev,
2062                             struct device_attribute *attr,
2063                             const char *buf, size_t count)
2064 {
2065         unsigned long t;
2066
2067         if (parse_strtoul(buf, 25, &t))
2068                 return -EINVAL;
2069
2070         if (mutex_lock_killable(&hotkey_mutex))
2071                 return -ERESTARTSYS;
2072
2073         hotkey_poll_freq = t;
2074
2075         hotkey_poll_setup(1);
2076         mutex_unlock(&hotkey_mutex);
2077
2078         return count;
2079 }
2080
2081 static struct device_attribute dev_attr_hotkey_poll_freq =
2082         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
2083                 hotkey_poll_freq_show, hotkey_poll_freq_store);
2084
2085 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
2086
2087 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
2088 static ssize_t hotkey_radio_sw_show(struct device *dev,
2089                            struct device_attribute *attr,
2090                            char *buf)
2091 {
2092         int res, s;
2093         res = hotkey_get_wlsw(&s);
2094         if (res < 0)
2095                 return res;
2096
2097         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2098 }
2099
2100 static struct device_attribute dev_attr_hotkey_radio_sw =
2101         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
2102
2103 static void hotkey_radio_sw_notify_change(void)
2104 {
2105         if (tp_features.hotkey_wlsw)
2106                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2107                              "hotkey_radio_sw");
2108 }
2109
2110 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
2111 static ssize_t hotkey_tablet_mode_show(struct device *dev,
2112                            struct device_attribute *attr,
2113                            char *buf)
2114 {
2115         int res, s;
2116         res = hotkey_get_tablet_mode(&s);
2117         if (res < 0)
2118                 return res;
2119
2120         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
2121 }
2122
2123 static struct device_attribute dev_attr_hotkey_tablet_mode =
2124         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
2125
2126 static void hotkey_tablet_mode_notify_change(void)
2127 {
2128         if (tp_features.hotkey_tablet)
2129                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2130                              "hotkey_tablet_mode");
2131 }
2132
2133 /* sysfs hotkey report_mode -------------------------------------------- */
2134 static ssize_t hotkey_report_mode_show(struct device *dev,
2135                            struct device_attribute *attr,
2136                            char *buf)
2137 {
2138         return snprintf(buf, PAGE_SIZE, "%d\n",
2139                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
2140 }
2141
2142 static struct device_attribute dev_attr_hotkey_report_mode =
2143         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
2144
2145 /* sysfs wakeup reason (pollable) -------------------------------------- */
2146 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
2147                            struct device_attribute *attr,
2148                            char *buf)
2149 {
2150         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
2151 }
2152
2153 static struct device_attribute dev_attr_hotkey_wakeup_reason =
2154         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
2155
2156 static void hotkey_wakeup_reason_notify_change(void)
2157 {
2158         if (tp_features.hotkey_mask)
2159                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2160                              "wakeup_reason");
2161 }
2162
2163 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
2164 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
2165                            struct device_attribute *attr,
2166                            char *buf)
2167 {
2168         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
2169 }
2170
2171 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
2172         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
2173                hotkey_wakeup_hotunplug_complete_show, NULL);
2174
2175 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
2176 {
2177         if (tp_features.hotkey_mask)
2178                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
2179                              "wakeup_hotunplug_complete");
2180 }
2181
2182 /* --------------------------------------------------------------------- */
2183
2184 static struct attribute *hotkey_attributes[] __initdata = {
2185         &dev_attr_hotkey_enable.attr,
2186         &dev_attr_hotkey_bios_enabled.attr,
2187         &dev_attr_hotkey_report_mode.attr,
2188 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2189         &dev_attr_hotkey_mask.attr,
2190         &dev_attr_hotkey_all_mask.attr,
2191         &dev_attr_hotkey_recommended_mask.attr,
2192         &dev_attr_hotkey_source_mask.attr,
2193         &dev_attr_hotkey_poll_freq.attr,
2194 #endif
2195 };
2196
2197 static struct attribute *hotkey_mask_attributes[] __initdata = {
2198         &dev_attr_hotkey_bios_mask.attr,
2199 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2200         &dev_attr_hotkey_mask.attr,
2201         &dev_attr_hotkey_all_mask.attr,
2202         &dev_attr_hotkey_recommended_mask.attr,
2203 #endif
2204         &dev_attr_hotkey_wakeup_reason.attr,
2205         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
2206 };
2207
2208 static void bluetooth_update_rfk(void);
2209 static void wan_update_rfk(void);
2210 static void uwb_update_rfk(void);
2211 static void tpacpi_send_radiosw_update(void)
2212 {
2213         int wlsw;
2214
2215         /* Sync these BEFORE sending any rfkill events */
2216         if (tp_features.bluetooth)
2217                 bluetooth_update_rfk();
2218         if (tp_features.wan)
2219                 wan_update_rfk();
2220         if (tp_features.uwb)
2221                 uwb_update_rfk();
2222
2223         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
2224                 mutex_lock(&tpacpi_inputdev_send_mutex);
2225
2226                 input_report_switch(tpacpi_inputdev,
2227                                     SW_RFKILL_ALL, !!wlsw);
2228                 input_sync(tpacpi_inputdev);
2229
2230                 mutex_unlock(&tpacpi_inputdev_send_mutex);
2231         }
2232         hotkey_radio_sw_notify_change();
2233 }
2234
2235 static void hotkey_exit(void)
2236 {
2237 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2238         hotkey_poll_stop_sync();
2239 #endif
2240
2241         if (hotkey_dev_attributes)
2242                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2243
2244         kfree(hotkey_keycode_map);
2245
2246         if (tp_features.hotkey) {
2247                 dbg_printk(TPACPI_DBG_EXIT,
2248                            "restoring original hot key mask\n");
2249                 /* no short-circuit boolean operator below! */
2250                 if ((hotkey_mask_set(hotkey_orig_mask) |
2251                      hotkey_status_set(false)) != 0)
2252                         printk(TPACPI_ERR
2253                                "failed to restore hot key mask "
2254                                "to BIOS defaults\n");
2255         }
2256 }
2257
2258 static int __init hotkey_init(struct ibm_init_struct *iibm)
2259 {
2260         /* Requirements for changing the default keymaps:
2261          *
2262          * 1. Many of the keys are mapped to KEY_RESERVED for very
2263          *    good reasons.  Do not change them unless you have deep
2264          *    knowledge on the IBM and Lenovo ThinkPad firmware for
2265          *    the various ThinkPad models.  The driver behaves
2266          *    differently for KEY_RESERVED: such keys have their
2267          *    hot key mask *unset* in mask_recommended, and also
2268          *    in the initial hot key mask programmed into the
2269          *    firmware at driver load time, which means the firm-
2270          *    ware may react very differently if you change them to
2271          *    something else;
2272          *
2273          * 2. You must be subscribed to the linux-thinkpad and
2274          *    ibm-acpi-devel mailing lists, and you should read the
2275          *    list archives since 2007 if you want to change the
2276          *    keymaps.  This requirement exists so that you will
2277          *    know the past history of problems with the thinkpad-
2278          *    acpi driver keymaps, and also that you will be
2279          *    listening to any bug reports;
2280          *
2281          * 3. Do not send thinkpad-acpi specific patches directly to
2282          *    for merging, *ever*.  Send them to the linux-acpi
2283          *    mailinglist for comments.  Merging is to be done only
2284          *    through acpi-test and the ACPI maintainer.
2285          *
2286          * If the above is too much to ask, don't change the keymap.
2287          * Ask the thinkpad-acpi maintainer to do it, instead.
2288          */
2289         static u16 ibm_keycode_map[] __initdata = {
2290                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2291                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
2292                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2293                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2294
2295                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2296                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2297                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2298                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2299
2300                 /* brightness: firmware always reacts to them, unless
2301                  * X.org did some tricks in the radeon BIOS scratch
2302                  * registers of *some* models */
2303                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2304                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2305
2306                 /* Thinklight: firmware always react to it */
2307                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2308
2309                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2310                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2311
2312                 /* Volume: firmware always react to it and reprograms
2313                  * the built-in *extra* mixer.  Never map it to control
2314                  * another mixer by default. */
2315                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2316                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2317                 KEY_RESERVED,   /* 0x16: MUTE */
2318
2319                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2320
2321                 /* (assignments unknown, please report if found) */
2322                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2323                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2324         };
2325         static u16 lenovo_keycode_map[] __initdata = {
2326                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2327                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2328                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2329                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2330
2331                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2332                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2333                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2334                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2335
2336                 /* These either have to go through ACPI video, or
2337                  * act like in the IBM ThinkPads, so don't ever
2338                  * enable them by default */
2339                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2340                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2341
2342                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2343
2344                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2345                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2346
2347                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2348                  * react to it and reprograms the built-in *extra* mixer.
2349                  * Never map it to control another mixer by default.
2350                  *
2351                  * T60?, T61, R60?, R61: firmware and EC tries to send
2352                  * these over the regular keyboard, so these are no-ops,
2353                  * but there are still weird bugs re. MUTE, so do not
2354                  * change unless you get test reports from all Lenovo
2355                  * models.  May cause the BIOS to interfere with the
2356                  * HDA mixer.
2357                  */
2358                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2359                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2360                 KEY_RESERVED,   /* 0x16: MUTE */
2361
2362                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2363
2364                 /* (assignments unknown, please report if found) */
2365                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2366                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2367         };
2368
2369 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2370 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2371 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2372
2373         int res, i;
2374         int status;
2375         int hkeyv;
2376
2377         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2378
2379         BUG_ON(!tpacpi_inputdev);
2380         BUG_ON(tpacpi_inputdev->open != NULL ||
2381                tpacpi_inputdev->close != NULL);
2382
2383         TPACPI_ACPIHANDLE_INIT(hkey);
2384         mutex_init(&hotkey_mutex);
2385
2386 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2387         mutex_init(&hotkey_thread_mutex);
2388         mutex_init(&hotkey_thread_data_mutex);
2389 #endif
2390
2391         /* hotkey not supported on 570 */
2392         tp_features.hotkey = hkey_handle != NULL;
2393
2394         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2395                 str_supported(tp_features.hotkey));
2396
2397         if (!tp_features.hotkey)
2398                 return 1;
2399
2400         tpacpi_disable_brightness_delay();
2401
2402         hotkey_dev_attributes = create_attr_set(13, NULL);
2403         if (!hotkey_dev_attributes)
2404                 return -ENOMEM;
2405         res = add_many_to_attr_set(hotkey_dev_attributes,
2406                         hotkey_attributes,
2407                         ARRAY_SIZE(hotkey_attributes));
2408         if (res)
2409                 goto err_exit;
2410
2411         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2412            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2413            for HKEY interface version 0x100 */
2414         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2415                 if ((hkeyv >> 8) != 1) {
2416                         printk(TPACPI_ERR "unknown version of the "
2417                                "HKEY interface: 0x%x\n", hkeyv);
2418                         printk(TPACPI_ERR "please report this to %s\n",
2419                                TPACPI_MAIL);
2420                 } else {
2421                         /*
2422                          * MHKV 0x100 in A31, R40, R40e,
2423                          * T4x, X31, and later
2424                          */
2425                         tp_features.hotkey_mask = 1;
2426                 }
2427         }
2428
2429         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2430                 str_supported(tp_features.hotkey_mask));
2431
2432         if (tp_features.hotkey_mask) {
2433                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2434                                 "MHKA", "qd")) {
2435                         printk(TPACPI_ERR
2436                                "missing MHKA handler, "
2437                                "please report this to %s\n",
2438                                TPACPI_MAIL);
2439                         /* FN+F12, FN+F4, FN+F3 */
2440                         hotkey_all_mask = 0x080cU;
2441                 }
2442         }
2443
2444         /* hotkey_source_mask *must* be zero for
2445          * the first hotkey_mask_get */
2446         if (tp_features.hotkey_mask) {
2447                 res = hotkey_mask_get();
2448                 if (res)
2449                         goto err_exit;
2450
2451                 hotkey_orig_mask = hotkey_mask;
2452                 res = add_many_to_attr_set(
2453                                 hotkey_dev_attributes,
2454                                 hotkey_mask_attributes,
2455                                 ARRAY_SIZE(hotkey_mask_attributes));
2456                 if (res)
2457                         goto err_exit;
2458         }
2459
2460 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2461         if (tp_features.hotkey_mask) {
2462                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2463                                         & ~hotkey_all_mask;
2464         } else {
2465                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2466         }
2467
2468         vdbg_printk(TPACPI_DBG_INIT,
2469                     "hotkey source mask 0x%08x, polling freq %d\n",
2470                     hotkey_source_mask, hotkey_poll_freq);
2471 #endif
2472
2473 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
2474         if (dbg_wlswemul) {
2475                 tp_features.hotkey_wlsw = 1;
2476                 printk(TPACPI_INFO
2477                         "radio switch emulation enabled\n");
2478         } else
2479 #endif
2480         /* Not all thinkpads have a hardware radio switch */
2481         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2482                 tp_features.hotkey_wlsw = 1;
2483                 printk(TPACPI_INFO
2484                         "radio switch found; radios are %s\n",
2485                         enabled(status, 0));
2486         }
2487         if (tp_features.hotkey_wlsw)
2488                 res = add_to_attr_set(hotkey_dev_attributes,
2489                                 &dev_attr_hotkey_radio_sw.attr);
2490
2491         /* For X41t, X60t, X61t Tablets... */
2492         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2493                 tp_features.hotkey_tablet = 1;
2494                 printk(TPACPI_INFO
2495                         "possible tablet mode switch found; "
2496                         "ThinkPad in %s mode\n",
2497                         (status & TP_HOTKEY_TABLET_MASK)?
2498                                 "tablet" : "laptop");
2499                 res = add_to_attr_set(hotkey_dev_attributes,
2500                                 &dev_attr_hotkey_tablet_mode.attr);
2501         }
2502
2503         if (!res)
2504                 res = register_attr_set_with_sysfs(
2505                                 hotkey_dev_attributes,
2506                                 &tpacpi_pdev->dev.kobj);
2507         if (res)
2508                 goto err_exit;
2509
2510         /* Set up key map */
2511
2512         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2513                                         GFP_KERNEL);
2514         if (!hotkey_keycode_map) {
2515                 printk(TPACPI_ERR
2516                         "failed to allocate memory for key map\n");
2517                 res = -ENOMEM;
2518                 goto err_exit;
2519         }
2520
2521         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2522                 dbg_printk(TPACPI_DBG_INIT,
2523                            "using Lenovo default hot key map\n");
2524                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2525                         TPACPI_HOTKEY_MAP_SIZE);
2526         } else {
2527                 dbg_printk(TPACPI_DBG_INIT,
2528                            "using IBM default hot key map\n");
2529                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2530                         TPACPI_HOTKEY_MAP_SIZE);
2531         }
2532
2533         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2534         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2535         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2536         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2537         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2538         tpacpi_inputdev->keycode = hotkey_keycode_map;
2539         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2540                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2541                         set_bit(hotkey_keycode_map[i],
2542                                 tpacpi_inputdev->keybit);
2543                 } else {
2544                         if (i < sizeof(hotkey_reserved_mask)*8)
2545                                 hotkey_reserved_mask |= 1 << i;
2546                 }
2547         }
2548
2549         if (tp_features.hotkey_wlsw) {
2550                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2551                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2552         }
2553         if (tp_features.hotkey_tablet) {
2554                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2555                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2556         }
2557
2558         /* Do not issue duplicate brightness change events to
2559          * userspace */
2560         if (!tp_features.bright_acpimode)
2561                 /* update bright_acpimode... */
2562                 tpacpi_check_std_acpi_brightness_support();
2563
2564         if (tp_features.bright_acpimode) {
2565                 printk(TPACPI_INFO
2566                        "This ThinkPad has standard ACPI backlight "
2567                        "brightness control, supported by the ACPI "
2568                        "video driver\n");
2569                 printk(TPACPI_NOTICE
2570                        "Disabling thinkpad-acpi brightness events "
2571                        "by default...\n");
2572
2573                 /* The hotkey_reserved_mask change below is not
2574                  * necessary while the keys are at KEY_RESERVED in the
2575                  * default map, but better safe than sorry, leave it
2576                  * here as a marker of what we have to do, especially
2577                  * when we finally become able to set this at runtime
2578                  * on response to X.org requests */
2579                 hotkey_reserved_mask |=
2580                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2581                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2582         }
2583
2584         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2585         res = hotkey_status_set(true);
2586         if (res) {
2587                 hotkey_exit();
2588                 return res;
2589         }
2590         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2591                                 & ~hotkey_reserved_mask)
2592                                 | hotkey_orig_mask);
2593         if (res < 0 && res != -ENXIO) {
2594                 hotkey_exit();
2595                 return res;
2596         }
2597
2598         dbg_printk(TPACPI_DBG_INIT,
2599                         "legacy hot key reporting over procfs %s\n",
2600                         (hotkey_report_mode < 2) ?
2601                                 "enabled" : "disabled");
2602
2603         tpacpi_inputdev->open = &hotkey_inputdev_open;
2604         tpacpi_inputdev->close = &hotkey_inputdev_close;
2605
2606         hotkey_poll_setup_safe(1);
2607         tpacpi_send_radiosw_update();
2608         tpacpi_input_send_tabletsw();
2609
2610         return 0;
2611
2612 err_exit:
2613         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2614         hotkey_dev_attributes = NULL;
2615
2616         return (res < 0)? res : 1;
2617 }
2618
2619 static bool hotkey_notify_hotkey(const u32 hkey,
2620                                  bool *send_acpi_ev,
2621                                  bool *ignore_acpi_ev)
2622 {
2623         /* 0x1000-0x1FFF: key presses */
2624         unsigned int scancode = hkey & 0xfff;
2625         *send_acpi_ev = true;
2626         *ignore_acpi_ev = false;
2627
2628         if (scancode > 0 && scancode < 0x21) {
2629                 scancode--;
2630                 if (!(hotkey_source_mask & (1 << scancode))) {
2631                         tpacpi_input_send_key(scancode);
2632                         *send_acpi_ev = false;
2633                 } else {
2634                         *ignore_acpi_ev = true;
2635                 }
2636                 return true;
2637         }
2638         return false;
2639 }
2640
2641 static bool hotkey_notify_wakeup(const u32 hkey,
2642                                  bool *send_acpi_ev,
2643                                  bool *ignore_acpi_ev)
2644 {
2645         /* 0x2000-0x2FFF: Wakeup reason */
2646         *send_acpi_ev = true;
2647         *ignore_acpi_ev = false;
2648
2649         switch (hkey) {
2650         case 0x2304: /* suspend, undock */
2651         case 0x2404: /* hibernation, undock */
2652                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2653                 *ignore_acpi_ev = true;
2654                 break;
2655
2656         case 0x2305: /* suspend, bay eject */
2657         case 0x2405: /* hibernation, bay eject */
2658                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2659                 *ignore_acpi_ev = true;
2660                 break;
2661
2662         case 0x2313: /* Battery on critical low level (S3) */
2663         case 0x2413: /* Battery on critical low level (S4) */
2664                 printk(TPACPI_ALERT
2665                         "EMERGENCY WAKEUP: battery almost empty\n");
2666                 /* how to auto-heal: */
2667                 /* 2313: woke up from S3, go to S4/S5 */
2668                 /* 2413: woke up from S4, go to S5 */
2669                 break;
2670
2671         default:
2672                 return false;
2673         }
2674
2675         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2676                 printk(TPACPI_INFO
2677                        "woke up due to a hot-unplug "
2678                        "request...\n");
2679                 hotkey_wakeup_reason_notify_change();
2680         }
2681         return true;
2682 }
2683
2684 static bool hotkey_notify_usrevent(const u32 hkey,
2685                                  bool *send_acpi_ev,
2686                                  bool *ignore_acpi_ev)
2687 {
2688         /* 0x5000-0x5FFF: human interface helpers */
2689         *send_acpi_ev = true;
2690         *ignore_acpi_ev = false;
2691
2692         switch (hkey) {
2693         case 0x5010: /* Lenovo new BIOS: brightness changed */
2694         case 0x500b: /* X61t: tablet pen inserted into bay */
2695         case 0x500c: /* X61t: tablet pen removed from bay */
2696                 return true;
2697
2698         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2699         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2700                 tpacpi_input_send_tabletsw();
2701                 hotkey_tablet_mode_notify_change();
2702                 *send_acpi_ev = false;
2703                 return true;
2704
2705         case 0x5001:
2706         case 0x5002:
2707                 /* LID switch events.  Do not propagate */
2708                 *ignore_acpi_ev = true;
2709                 return true;
2710
2711         default:
2712                 return false;
2713         }
2714 }
2715
2716 static bool hotkey_notify_thermal(const u32 hkey,
2717                                  bool *send_acpi_ev,
2718                                  bool *ignore_acpi_ev)
2719 {
2720         /* 0x6000-0x6FFF: thermal alarms */
2721         *send_acpi_ev = true;
2722         *ignore_acpi_ev = false;
2723
2724         switch (hkey) {
2725         case 0x6011:
2726                 printk(TPACPI_CRIT
2727                         "THERMAL ALARM: battery is too hot!\n");
2728                 /* recommended action: warn user through gui */
2729                 return true;
2730         case 0x6012:
2731                 printk(TPACPI_ALERT
2732                         "THERMAL EMERGENCY: battery is extremely hot!\n");
2733                 /* recommended action: immediate sleep/hibernate */
2734                 return true;
2735         case 0x6021:
2736                 printk(TPACPI_CRIT
2737                         "THERMAL ALARM: "
2738                         "a sensor reports something is too hot!\n");
2739                 /* recommended action: warn user through gui, that */
2740                 /* some internal component is too hot */
2741                 return true;
2742         case 0x6022:
2743                 printk(TPACPI_ALERT
2744                         "THERMAL EMERGENCY: "
2745                         "a sensor reports something is extremely hot!\n");
2746                 /* recommended action: immediate sleep/hibernate */
2747                 return true;
2748         case 0x6030:
2749                 printk(TPACPI_INFO
2750                         "EC reports that Thermal Table has changed\n");
2751                 /* recommended action: do nothing, we don't have
2752                  * Lenovo ATM information */
2753                 return true;
2754         default:
2755                 printk(TPACPI_ALERT
2756                          "THERMAL ALERT: unknown thermal alarm received\n");
2757                 return false;
2758         }
2759 }
2760
2761 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2762 {
2763         u32 hkey;
2764         bool send_acpi_ev;
2765         bool ignore_acpi_ev;
2766         bool known_ev;
2767
2768         if (event != 0x80) {
2769                 printk(TPACPI_ERR
2770                        "unknown HKEY notification event %d\n", event);
2771                 /* forward it to userspace, maybe it knows how to handle it */
2772                 acpi_bus_generate_netlink_event(
2773                                         ibm->acpi->device->pnp.device_class,
2774                                         dev_name(&ibm->acpi->device->dev),
2775                                         event, 0);
2776                 return;
2777         }
2778
2779         while (1) {
2780                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2781                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2782                         return;
2783                 }
2784
2785                 if (hkey == 0) {
2786                         /* queue empty */
2787                         return;
2788                 }
2789
2790                 send_acpi_ev = true;
2791                 ignore_acpi_ev = false;
2792
2793                 switch (hkey >> 12) {
2794                 case 1:
2795                         /* 0x1000-0x1FFF: key presses */
2796                         known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev,
2797                                                  &ignore_acpi_ev);
2798                         break;
2799                 case 2:
2800                         /* 0x2000-0x2FFF: Wakeup reason */
2801                         known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev,
2802                                                  &ignore_acpi_ev);
2803                         break;
2804                 case 3:
2805                         /* 0x3000-0x3FFF: bay-related wakeups */
2806                         if (hkey == 0x3003) {
2807                                 hotkey_autosleep_ack = 1;
2808                                 printk(TPACPI_INFO
2809                                        "bay ejected\n");
2810                                 hotkey_wakeup_hotunplug_complete_notify_change();
2811                                 known_ev = true;
2812                         } else {
2813                                 known_ev = false;
2814                         }
2815                         break;
2816                 case 4:
2817                         /* 0x4000-0x4FFF: dock-related wakeups */
2818                         if (hkey == 0x4003) {
2819                                 hotkey_autosleep_ack = 1;
2820                                 printk(TPACPI_INFO
2821                                        "undocked\n");
2822                                 hotkey_wakeup_hotunplug_complete_notify_change();
2823                                 known_ev = true;
2824                         } else {
2825                                 known_ev = false;
2826                         }
2827                         break;
2828                 case 5:
2829                         /* 0x5000-0x5FFF: human interface helpers */
2830                         known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev,
2831                                                  &ignore_acpi_ev);
2832                         break;
2833                 case 6:
2834                         /* 0x6000-0x6FFF: thermal alarms */
2835                         known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev,
2836                                                  &ignore_acpi_ev);
2837                         break;
2838                 case 7:
2839                         /* 0x7000-0x7FFF: misc */
2840                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2841                                 tpacpi_send_radiosw_update();
2842                                 send_acpi_ev = 0;
2843                                 known_ev = true;
2844                                 break;
2845                         }
2846                         /* fallthrough to default */
2847                 default:
2848                         known_ev = false;
2849                 }
2850                 if (!known_ev) {
2851                         printk(TPACPI_NOTICE
2852                                "unhandled HKEY event 0x%04x\n", hkey);
2853                         printk(TPACPI_NOTICE
2854                                "please report the conditions when this "
2855                                "event happened to %s\n", TPACPI_MAIL);
2856                 }
2857
2858                 /* Legacy events */
2859                 if (!ignore_acpi_ev &&
2860                     (send_acpi_ev || hotkey_report_mode < 2)) {
2861                         acpi_bus_generate_proc_event(ibm->acpi->device,
2862                                                      event, hkey);
2863                 }
2864
2865                 /* netlink events */
2866                 if (!ignore_acpi_ev && send_acpi_ev) {
2867                         acpi_bus_generate_netlink_event(
2868                                         ibm->acpi->device->pnp.device_class,
2869                                         dev_name(&ibm->acpi->device->dev),
2870                                         event, hkey);
2871                 }
2872         }
2873 }
2874
2875 static void hotkey_suspend(pm_message_t state)
2876 {
2877         /* Do these on suspend, we get the events on early resume! */
2878         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2879         hotkey_autosleep_ack = 0;
2880 }
2881
2882 static void hotkey_resume(void)
2883 {
2884         tpacpi_disable_brightness_delay();
2885
2886         if (hotkey_mask_get())
2887                 printk(TPACPI_ERR
2888                        "error while trying to read hot key mask "
2889                        "from firmware\n");
2890         tpacpi_send_radiosw_update();
2891         hotkey_tablet_mode_notify_change();
2892         hotkey_wakeup_reason_notify_change();
2893         hotkey_wakeup_hotunplug_complete_notify_change();
2894         hotkey_poll_setup_safe(0);
2895 }
2896
2897 /* procfs -------------------------------------------------------------- */
2898 static int hotkey_read(char *p)
2899 {
2900         int res, status;
2901         int len = 0;
2902
2903         if (!tp_features.hotkey) {
2904                 len += sprintf(p + len, "status:\t\tnot supported\n");
2905                 return len;
2906         }
2907
2908         if (mutex_lock_killable(&hotkey_mutex))
2909                 return -ERESTARTSYS;
2910         res = hotkey_status_get(&status);
2911         if (!res)
2912                 res = hotkey_mask_get();
2913         mutex_unlock(&hotkey_mutex);
2914         if (res)
2915                 return res;
2916
2917         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2918         if (tp_features.hotkey_mask) {
2919                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2920                 len += sprintf(p + len,
2921                                "commands:\tenable, disable, reset, <mask>\n");
2922         } else {
2923                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2924                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2925         }
2926
2927         return len;
2928 }
2929
2930 static void hotkey_enabledisable_warn(void)
2931 {
2932         tpacpi_log_usertask("procfs hotkey enable/disable");
2933         WARN(1, TPACPI_WARN
2934              "hotkey enable/disable functionality has been "
2935              "removed from the driver. Hotkeys are always enabled.\n");
2936 }
2937
2938 static int hotkey_write(char *buf)
2939 {
2940         int res;
2941         u32 mask;
2942         char *cmd;
2943
2944         if (!tp_features.hotkey)
2945                 return -ENODEV;
2946
2947         if (mutex_lock_killable(&hotkey_mutex))
2948                 return -ERESTARTSYS;
2949
2950         mask = hotkey_mask;
2951
2952         res = 0;
2953         while ((cmd = next_cmd(&buf))) {
2954                 if (strlencmp(cmd, "enable") == 0) {
2955                         hotkey_enabledisable_warn();
2956                 } else if (strlencmp(cmd, "disable") == 0) {
2957                         hotkey_enabledisable_warn();
2958                         res = -EPERM;
2959                 } else if (strlencmp(cmd, "reset") == 0) {
2960                         mask = hotkey_orig_mask;
2961                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2962                         /* mask set */
2963                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2964                         /* mask set */
2965                 } else {
2966                         res = -EINVAL;
2967                         goto errexit;
2968                 }
2969         }
2970         if (!res && mask != hotkey_mask)
2971                 res = hotkey_mask_set(mask);
2972
2973 errexit:
2974         mutex_unlock(&hotkey_mutex);
2975         return res;
2976 }
2977
2978 static const struct acpi_device_id ibm_htk_device_ids[] = {
2979         {TPACPI_ACPI_HKEY_HID, 0},
2980         {"", 0},
2981 };
2982
2983 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2984         .hid = ibm_htk_device_ids,
2985         .notify = hotkey_notify,
2986         .handle = &hkey_handle,
2987         .type = ACPI_DEVICE_NOTIFY,
2988 };
2989
2990 static struct ibm_struct hotkey_driver_data = {
2991         .name = "hotkey",
2992         .read = hotkey_read,
2993         .write = hotkey_write,
2994         .exit = hotkey_exit,
2995         .resume = hotkey_resume,
2996         .suspend = hotkey_suspend,
2997         .acpi = &ibm_hotkey_acpidriver,
2998 };
2999
3000 /*************************************************************************
3001  * Bluetooth subdriver
3002  */
3003
3004 enum {
3005         /* ACPI GBDC/SBDC bits */
3006         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
3007         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
3008         TP_ACPI_BLUETOOTH_RESUMECTRL    = 0x04, /* Bluetooth state at resume:
3009                                                    off / last state */
3010 };
3011
3012 enum {
3013         /* ACPI \BLTH commands */
3014         TP_ACPI_BLTH_GET_ULTRAPORT_ID   = 0x00, /* Get Ultraport BT ID */
3015         TP_ACPI_BLTH_GET_PWR_ON_RESUME  = 0x01, /* Get power-on-resume state */
3016         TP_ACPI_BLTH_PWR_ON_ON_RESUME   = 0x02, /* Resume powered on */
3017         TP_ACPI_BLTH_PWR_OFF_ON_RESUME  = 0x03, /* Resume powered off */
3018         TP_ACPI_BLTH_SAVE_STATE         = 0x05, /* Save state for S4/S5 */
3019 };
3020
3021 static struct rfkill *tpacpi_bluetooth_rfkill;
3022
3023 static void bluetooth_suspend(pm_message_t state)
3024 {
3025         /* Try to make sure radio will resume powered off */
3026         acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3027                    TP_ACPI_BLTH_PWR_OFF_ON_RESUME);
3028 }
3029
3030 static int bluetooth_get_radiosw(void)
3031 {
3032         int status;
3033
3034         if (!tp_features.bluetooth)
3035                 return -ENODEV;
3036
3037         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
3038         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3039                 return RFKILL_STATE_HARD_BLOCKED;
3040
3041 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3042         if (dbg_bluetoothemul)
3043                 return (tpacpi_bluetooth_emulstate) ?
3044                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3045 #endif
3046
3047         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
3048                 return -EIO;
3049
3050         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ?
3051                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3052 }
3053
3054 static void bluetooth_update_rfk(void)
3055 {
3056         int status;
3057
3058         if (!tpacpi_bluetooth_rfkill)
3059                 return;
3060
3061         status = bluetooth_get_radiosw();
3062         if (status < 0)
3063                 return;
3064         rfkill_force_state(tpacpi_bluetooth_rfkill, status);
3065 }
3066
3067 static int bluetooth_set_radiosw(int radio_on, int update_rfk)
3068 {
3069         int status;
3070
3071         if (!tp_features.bluetooth)
3072                 return -ENODEV;
3073
3074         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3075          * reason to risk weird behaviour. */
3076         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3077             && radio_on)
3078                 return -EPERM;
3079
3080 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3081         if (dbg_bluetoothemul) {
3082                 tpacpi_bluetooth_emulstate = !!radio_on;
3083                 if (update_rfk)
3084                         bluetooth_update_rfk();
3085                 return 0;
3086         }
3087 #endif
3088
3089         /* We make sure to keep TP_ACPI_BLUETOOTH_RESUMECTRL off */
3090         if (radio_on)
3091                 status = TP_ACPI_BLUETOOTH_RADIOSSW;
3092         else
3093                 status = 0;
3094         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
3095                 return -EIO;
3096
3097         if (update_rfk)
3098                 bluetooth_update_rfk();
3099
3100         return 0;
3101 }
3102
3103 /* sysfs bluetooth enable ---------------------------------------------- */
3104 static ssize_t bluetooth_enable_show(struct device *dev,
3105                            struct device_attribute *attr,
3106                            char *buf)
3107 {
3108         int status;
3109
3110         printk_deprecated_rfkill_attribute("bluetooth_enable");
3111
3112         status = bluetooth_get_radiosw();
3113         if (status < 0)
3114                 return status;
3115
3116         return snprintf(buf, PAGE_SIZE, "%d\n",
3117                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3118 }
3119
3120 static ssize_t bluetooth_enable_store(struct device *dev,
3121                             struct device_attribute *attr,
3122                             const char *buf, size_t count)
3123 {
3124         unsigned long t;
3125         int res;
3126
3127         printk_deprecated_rfkill_attribute("bluetooth_enable");
3128
3129         if (parse_strtoul(buf, 1, &t))
3130                 return -EINVAL;
3131
3132         res = bluetooth_set_radiosw(t, 1);
3133
3134         return (res) ? res : count;
3135 }
3136
3137 static struct device_attribute dev_attr_bluetooth_enable =
3138         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
3139                 bluetooth_enable_show, bluetooth_enable_store);
3140
3141 /* --------------------------------------------------------------------- */
3142
3143 static struct attribute *bluetooth_attributes[] = {
3144         &dev_attr_bluetooth_enable.attr,
3145         NULL
3146 };
3147
3148 static const struct attribute_group bluetooth_attr_group = {
3149         .attrs = bluetooth_attributes,
3150 };
3151
3152 static int tpacpi_bluetooth_rfk_get(void *data, enum rfkill_state *state)
3153 {
3154         int bts = bluetooth_get_radiosw();
3155
3156         if (bts < 0)
3157                 return bts;
3158
3159         *state = bts;
3160         return 0;
3161 }
3162
3163 static int tpacpi_bluetooth_rfk_set(void *data, enum rfkill_state state)
3164 {
3165         return bluetooth_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3166 }
3167
3168 static void bluetooth_shutdown(void)
3169 {
3170         /* Order firmware to save current state to NVRAM */
3171         if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd",
3172                         TP_ACPI_BLTH_SAVE_STATE))
3173                 printk(TPACPI_NOTICE
3174                         "failed to save bluetooth state to NVRAM\n");
3175 }
3176
3177 static void bluetooth_exit(void)
3178 {
3179         bluetooth_shutdown();
3180
3181         if (tpacpi_bluetooth_rfkill)
3182                 rfkill_unregister(tpacpi_bluetooth_rfkill);
3183
3184         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3185                         &bluetooth_attr_group);
3186 }
3187
3188 static int __init bluetooth_init(struct ibm_init_struct *iibm)
3189 {
3190         int res;
3191         int status = 0;
3192
3193         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
3194
3195         TPACPI_ACPIHANDLE_INIT(hkey);
3196
3197         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3198            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
3199         tp_features.bluetooth = hkey_handle &&
3200             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
3201
3202         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
3203                 str_supported(tp_features.bluetooth),
3204                 status);
3205
3206 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3207         if (dbg_bluetoothemul) {
3208                 tp_features.bluetooth = 1;
3209                 printk(TPACPI_INFO
3210                         "bluetooth switch emulation enabled\n");
3211         } else
3212 #endif
3213         if (tp_features.bluetooth &&
3214             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
3215                 /* no bluetooth hardware present in system */
3216                 tp_features.bluetooth = 0;
3217                 dbg_printk(TPACPI_DBG_INIT,
3218                            "bluetooth hardware not installed\n");
3219         }
3220
3221         if (!tp_features.bluetooth)
3222                 return 1;
3223
3224         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3225                                 &bluetooth_attr_group);
3226         if (res)
3227                 return res;
3228
3229         res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID,
3230                                 &tpacpi_bluetooth_rfkill,
3231                                 RFKILL_TYPE_BLUETOOTH,
3232                                 "tpacpi_bluetooth_sw",
3233                                 true,
3234                                 tpacpi_bluetooth_rfk_set,
3235                                 tpacpi_bluetooth_rfk_get);
3236         if (res) {
3237                 bluetooth_exit();
3238                 return res;
3239         }
3240
3241         return 0;
3242 }
3243
3244 /* procfs -------------------------------------------------------------- */
3245 static int bluetooth_read(char *p)
3246 {
3247         int len = 0;
3248         int status = bluetooth_get_radiosw();
3249
3250         if (!tp_features.bluetooth)
3251                 len += sprintf(p + len, "status:\t\tnot supported\n");
3252         else {
3253                 len += sprintf(p + len, "status:\t\t%s\n",
3254                                 (status == RFKILL_STATE_UNBLOCKED) ?
3255                                         "enabled" : "disabled");
3256                 len += sprintf(p + len, "commands:\tenable, disable\n");
3257         }
3258
3259         return len;
3260 }
3261
3262 static int bluetooth_write(char *buf)
3263 {
3264         char *cmd;
3265
3266         if (!tp_features.bluetooth)
3267                 return -ENODEV;
3268
3269         while ((cmd = next_cmd(&buf))) {
3270                 if (strlencmp(cmd, "enable") == 0) {
3271                         bluetooth_set_radiosw(1, 1);
3272                 } else if (strlencmp(cmd, "disable") == 0) {
3273                         bluetooth_set_radiosw(0, 1);
3274                 } else
3275                         return -EINVAL;
3276         }
3277
3278         return 0;
3279 }
3280
3281 static struct ibm_struct bluetooth_driver_data = {
3282         .name = "bluetooth",
3283         .read = bluetooth_read,
3284         .write = bluetooth_write,
3285         .exit = bluetooth_exit,
3286         .suspend = bluetooth_suspend,
3287         .shutdown = bluetooth_shutdown,
3288 };
3289
3290 /*************************************************************************
3291  * Wan subdriver
3292  */
3293
3294 enum {
3295         /* ACPI GWAN/SWAN bits */
3296         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
3297         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
3298         TP_ACPI_WANCARD_RESUMECTRL      = 0x04, /* Wan state at resume:
3299                                                    off / last state */
3300 };
3301
3302 static struct rfkill *tpacpi_wan_rfkill;
3303
3304 static void wan_suspend(pm_message_t state)
3305 {
3306         /* Try to make sure radio will resume powered off */
3307         acpi_evalf(NULL, NULL, "\\WGSV", "qvd",
3308                    TP_ACPI_WGSV_PWR_OFF_ON_RESUME);
3309 }
3310
3311 static int wan_get_radiosw(void)
3312 {
3313         int status;
3314
3315         if (!tp_features.wan)
3316                 return -ENODEV;
3317
3318         /* WLSW overrides WWAN in firmware/hardware, reflect that */
3319         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3320                 return RFKILL_STATE_HARD_BLOCKED;
3321
3322 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3323         if (dbg_wwanemul)
3324                 return (tpacpi_wwan_emulstate) ?
3325                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3326 #endif
3327
3328         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
3329                 return -EIO;
3330
3331         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ?
3332                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3333 }
3334
3335 static void wan_update_rfk(void)
3336 {
3337         int status;
3338
3339         if (!tpacpi_wan_rfkill)
3340                 return;
3341
3342         status = wan_get_radiosw();
3343         if (status < 0)
3344                 return;
3345         rfkill_force_state(tpacpi_wan_rfkill, status);
3346 }
3347
3348 static int wan_set_radiosw(int radio_on, int update_rfk)
3349 {
3350         int status;
3351
3352         if (!tp_features.wan)
3353                 return -ENODEV;
3354
3355         /* WLSW overrides bluetooth in firmware/hardware, but there is no
3356          * reason to risk weird behaviour. */
3357         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3358             && radio_on)
3359                 return -EPERM;
3360
3361 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3362         if (dbg_wwanemul) {
3363                 tpacpi_wwan_emulstate = !!radio_on;
3364                 if (update_rfk)
3365                         wan_update_rfk();
3366                 return 0;
3367         }
3368 #endif
3369
3370         /* We make sure to keep TP_ACPI_WANCARD_RESUMECTRL off */
3371         if (radio_on)
3372                 status = TP_ACPI_WANCARD_RADIOSSW;
3373         else
3374                 status = 0;
3375         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
3376                 return -EIO;
3377
3378         if (update_rfk)
3379                 wan_update_rfk();
3380
3381         return 0;
3382 }
3383
3384 /* sysfs wan enable ---------------------------------------------------- */
3385 static ssize_t wan_enable_show(struct device *dev,
3386                            struct device_attribute *attr,
3387                            char *buf)
3388 {
3389         int status;
3390
3391         printk_deprecated_rfkill_attribute("wwan_enable");
3392
3393         status = wan_get_radiosw();
3394         if (status < 0)
3395                 return status;
3396
3397         return snprintf(buf, PAGE_SIZE, "%d\n",
3398                         (status == RFKILL_STATE_UNBLOCKED) ? 1 : 0);
3399 }
3400
3401 static ssize_t wan_enable_store(struct device *dev,
3402                             struct device_attribute *attr,
3403                             const char *buf, size_t count)
3404 {
3405         unsigned long t;
3406         int res;
3407
3408         printk_deprecated_rfkill_attribute("wwan_enable");
3409
3410         if (parse_strtoul(buf, 1, &t))
3411                 return -EINVAL;
3412
3413         res = wan_set_radiosw(t, 1);
3414
3415         return (res) ? res : count;
3416 }
3417
3418 static struct device_attribute dev_attr_wan_enable =
3419         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
3420                 wan_enable_show, wan_enable_store);
3421
3422 /* --------------------------------------------------------------------- */
3423
3424 static struct attribute *wan_attributes[] = {
3425         &dev_attr_wan_enable.attr,
3426         NULL
3427 };
3428
3429 static const struct attribute_group wan_attr_group = {
3430         .attrs = wan_attributes,
3431 };
3432
3433 static int tpacpi_wan_rfk_get(void *data, enum rfkill_state *state)
3434 {
3435         int wans = wan_get_radiosw();
3436
3437         if (wans < 0)
3438                 return wans;
3439
3440         *state = wans;
3441         return 0;
3442 }
3443
3444 static int tpacpi_wan_rfk_set(void *data, enum rfkill_state state)
3445 {
3446         return wan_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3447 }
3448
3449 static void wan_shutdown(void)
3450 {
3451         /* Order firmware to save current state to NVRAM */
3452         if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd",
3453                         TP_ACPI_WGSV_SAVE_STATE))
3454                 printk(TPACPI_NOTICE
3455                         "failed to save WWAN state to NVRAM\n");
3456 }
3457
3458 static void wan_exit(void)
3459 {
3460         wan_shutdown();
3461
3462         if (tpacpi_wan_rfkill)
3463                 rfkill_unregister(tpacpi_wan_rfkill);
3464
3465         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
3466                 &wan_attr_group);
3467 }
3468
3469 static int __init wan_init(struct ibm_init_struct *iibm)
3470 {
3471         int res;
3472         int status = 0;
3473
3474         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
3475
3476         TPACPI_ACPIHANDLE_INIT(hkey);
3477
3478         tp_features.wan = hkey_handle &&
3479             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
3480
3481         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
3482                 str_supported(tp_features.wan),
3483                 status);
3484
3485 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3486         if (dbg_wwanemul) {
3487                 tp_features.wan = 1;
3488                 printk(TPACPI_INFO
3489                         "wwan switch emulation enabled\n");
3490         } else
3491 #endif
3492         if (tp_features.wan &&
3493             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
3494                 /* no wan hardware present in system */
3495                 tp_features.wan = 0;
3496                 dbg_printk(TPACPI_DBG_INIT,
3497                            "wan hardware not installed\n");
3498         }
3499
3500         if (!tp_features.wan)
3501                 return 1;
3502
3503         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
3504                                 &wan_attr_group);
3505         if (res)
3506                 return res;
3507
3508         res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID,
3509                                 &tpacpi_wan_rfkill,
3510                                 RFKILL_TYPE_WWAN,
3511                                 "tpacpi_wwan_sw",
3512                                 true,
3513                                 tpacpi_wan_rfk_set,
3514                                 tpacpi_wan_rfk_get);
3515         if (res) {
3516                 wan_exit();
3517                 return res;
3518         }
3519
3520         return 0;
3521 }
3522
3523 /* procfs -------------------------------------------------------------- */
3524 static int wan_read(char *p)
3525 {
3526         int len = 0;
3527         int status = wan_get_radiosw();
3528
3529         if (!tp_features.wan)
3530                 len += sprintf(p + len, "status:\t\tnot supported\n");
3531         else {
3532                 len += sprintf(p + len, "status:\t\t%s\n",
3533                                 (status == RFKILL_STATE_UNBLOCKED) ?
3534                                         "enabled" : "disabled");
3535                 len += sprintf(p + len, "commands:\tenable, disable\n");
3536         }
3537
3538         return len;
3539 }
3540
3541 static int wan_write(char *buf)
3542 {
3543         char *cmd;
3544
3545         if (!tp_features.wan)
3546                 return -ENODEV;
3547
3548         while ((cmd = next_cmd(&buf))) {
3549                 if (strlencmp(cmd, "enable") == 0) {
3550                         wan_set_radiosw(1, 1);
3551                 } else if (strlencmp(cmd, "disable") == 0) {
3552                         wan_set_radiosw(0, 1);
3553                 } else
3554                         return -EINVAL;
3555         }
3556
3557         return 0;
3558 }
3559
3560 static struct ibm_struct wan_driver_data = {
3561         .name = "wan",
3562         .read = wan_read,
3563         .write = wan_write,
3564         .exit = wan_exit,
3565         .suspend = wan_suspend,
3566         .shutdown = wan_shutdown,
3567 };
3568
3569 /*************************************************************************
3570  * UWB subdriver
3571  */
3572
3573 enum {
3574         /* ACPI GUWB/SUWB bits */
3575         TP_ACPI_UWB_HWPRESENT   = 0x01, /* UWB hw available */
3576         TP_ACPI_UWB_RADIOSSW    = 0x02, /* UWB radio enabled */
3577 };
3578
3579 static struct rfkill *tpacpi_uwb_rfkill;
3580
3581 static int uwb_get_radiosw(void)
3582 {
3583         int status;
3584
3585         if (!tp_features.uwb)
3586                 return -ENODEV;
3587
3588         /* WLSW overrides UWB in firmware/hardware, reflect that */
3589         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
3590                 return RFKILL_STATE_HARD_BLOCKED;
3591
3592 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3593         if (dbg_uwbemul)
3594                 return (tpacpi_uwb_emulstate) ?
3595                         RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3596 #endif
3597
3598         if (!acpi_evalf(hkey_handle, &status, "GUWB", "d"))
3599                 return -EIO;
3600
3601         return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ?
3602                 RFKILL_STATE_UNBLOCKED : RFKILL_STATE_SOFT_BLOCKED;
3603 }
3604
3605 static void uwb_update_rfk(void)
3606 {
3607         int status;
3608
3609         if (!tpacpi_uwb_rfkill)
3610                 return;
3611
3612         status = uwb_get_radiosw();
3613         if (status < 0)
3614                 return;
3615         rfkill_force_state(tpacpi_uwb_rfkill, status);
3616 }
3617
3618 static int uwb_set_radiosw(int radio_on, int update_rfk)
3619 {
3620         int status;
3621
3622         if (!tp_features.uwb)
3623                 return -ENODEV;
3624
3625         /* WLSW overrides UWB in firmware/hardware, but there is no
3626          * reason to risk weird behaviour. */
3627         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
3628             && radio_on)
3629                 return -EPERM;
3630
3631 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3632         if (dbg_uwbemul) {
3633                 tpacpi_uwb_emulstate = !!radio_on;
3634                 if (update_rfk)
3635                         uwb_update_rfk();
3636                 return 0;
3637         }
3638 #endif
3639
3640         status = (radio_on) ? TP_ACPI_UWB_RADIOSSW : 0;
3641         if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status))
3642                 return -EIO;
3643
3644         if (update_rfk)
3645                 uwb_update_rfk();
3646
3647         return 0;
3648 }
3649
3650 /* --------------------------------------------------------------------- */
3651
3652 static int tpacpi_uwb_rfk_get(void *data, enum rfkill_state *state)
3653 {
3654         int uwbs = uwb_get_radiosw();
3655
3656         if (uwbs < 0)
3657                 return uwbs;
3658
3659         *state = uwbs;
3660         return 0;
3661 }
3662
3663 static int tpacpi_uwb_rfk_set(void *data, enum rfkill_state state)
3664 {
3665         return uwb_set_radiosw((state == RFKILL_STATE_UNBLOCKED), 0);
3666 }
3667
3668 static void uwb_exit(void)
3669 {
3670         if (tpacpi_uwb_rfkill)
3671                 rfkill_unregister(tpacpi_uwb_rfkill);
3672 }
3673
3674 static int __init uwb_init(struct ibm_init_struct *iibm)
3675 {
3676         int res;
3677         int status = 0;
3678
3679         vdbg_printk(TPACPI_DBG_INIT, "initializing uwb subdriver\n");
3680
3681         TPACPI_ACPIHANDLE_INIT(hkey);
3682
3683         tp_features.uwb = hkey_handle &&
3684             acpi_evalf(hkey_handle, &status, "GUWB", "qd");
3685
3686         vdbg_printk(TPACPI_DBG_INIT, "uwb is %s, status 0x%02x\n",
3687                 str_supported(tp_features.uwb),
3688                 status);
3689
3690 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
3691         if (dbg_uwbemul) {
3692                 tp_features.uwb = 1;
3693                 printk(TPACPI_INFO
3694                         "uwb switch emulation enabled\n");
3695         } else
3696 #endif
3697         if (tp_features.uwb &&
3698             !(status & TP_ACPI_UWB_HWPRESENT)) {
3699                 /* no uwb hardware present in system */
3700                 tp_features.uwb = 0;
3701                 dbg_printk(TPACPI_DBG_INIT,
3702                            "uwb hardware not installed\n");
3703         }
3704
3705         if (!tp_features.uwb)
3706                 return 1;
3707
3708         res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID,
3709                                 &tpacpi_uwb_rfkill,
3710                                 RFKILL_TYPE_UWB,
3711                                 "tpacpi_uwb_sw",
3712                                 false,
3713                                 tpacpi_uwb_rfk_set,
3714                                 tpacpi_uwb_rfk_get);
3715
3716         return res;
3717 }
3718
3719 static struct ibm_struct uwb_driver_data = {
3720         .name = "uwb",
3721         .exit = uwb_exit,
3722         .flags.experimental = 1,
3723 };
3724
3725 /*************************************************************************
3726  * Video subdriver
3727  */
3728
3729 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
3730
3731 enum video_access_mode {
3732         TPACPI_VIDEO_NONE = 0,
3733         TPACPI_VIDEO_570,       /* 570 */
3734         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
3735         TPACPI_VIDEO_NEW,       /* all others */
3736 };
3737
3738 enum {  /* video status flags, based on VIDEO_570 */
3739         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
3740         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
3741         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
3742 };
3743
3744 enum {  /* TPACPI_VIDEO_570 constants */
3745         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
3746         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
3747                                                  * video_status_flags */
3748         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
3749         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
3750 };
3751
3752 static enum video_access_mode video_supported;
3753 static int video_orig_autosw;
3754
3755 static int video_autosw_get(void);
3756 static int video_autosw_set(int enable);
3757
3758 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
3759
3760 static int __init video_init(struct ibm_init_struct *iibm)
3761 {
3762         int ivga;
3763
3764         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
3765
3766         TPACPI_ACPIHANDLE_INIT(vid);
3767         TPACPI_ACPIHANDLE_INIT(vid2);
3768
3769         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
3770                 /* G41, assume IVGA doesn't change */
3771                 vid_handle = vid2_handle;
3772
3773         if (!vid_handle)
3774                 /* video switching not supported on R30, R31 */
3775                 video_supported = TPACPI_VIDEO_NONE;
3776         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
3777                 /* 570 */
3778                 video_supported = TPACPI_VIDEO_570;
3779         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
3780                 /* 600e/x, 770e, 770x */
3781                 video_supported = TPACPI_VIDEO_770;
3782         else
3783                 /* all others */
3784                 video_supported = TPACPI_VIDEO_NEW;
3785
3786         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
3787                 str_supported(video_supported != TPACPI_VIDEO_NONE),
3788                 video_supported);
3789
3790         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3791 }
3792
3793 static void video_exit(void)
3794 {
3795         dbg_printk(TPACPI_DBG_EXIT,
3796                    "restoring original video autoswitch mode\n");
3797         if (video_autosw_set(video_orig_autosw))
3798                 printk(TPACPI_ERR "error while trying to restore original "
3799                         "video autoswitch mode\n");
3800 }
3801
3802 static int video_outputsw_get(void)
3803 {
3804         int status = 0;
3805         int i;
3806
3807         switch (video_supported) {
3808         case TPACPI_VIDEO_570:
3809                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3810                                  TP_ACPI_VIDEO_570_PHSCMD))
3811                         return -EIO;
3812                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3813                 break;
3814         case TPACPI_VIDEO_770:
3815                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3816                         return -EIO;
3817                 if (i)
3818                         status |= TP_ACPI_VIDEO_S_LCD;
3819                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3820                         return -EIO;
3821                 if (i)
3822                         status |= TP_ACPI_VIDEO_S_CRT;
3823                 break;
3824         case TPACPI_VIDEO_NEW:
3825                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3826                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3827                         return -EIO;
3828                 if (i)
3829                         status |= TP_ACPI_VIDEO_S_CRT;
3830
3831                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3832                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3833                         return -EIO;
3834                 if (i)
3835                         status |= TP_ACPI_VIDEO_S_LCD;
3836                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3837                         return -EIO;
3838                 if (i)
3839                         status |= TP_ACPI_VIDEO_S_DVI;
3840                 break;
3841         default:
3842                 return -ENOSYS;
3843         }
3844
3845         return status;
3846 }
3847
3848 static int video_outputsw_set(int status)
3849 {
3850         int autosw;
3851         int res = 0;
3852
3853         switch (video_supported) {
3854         case TPACPI_VIDEO_570:
3855                 res = acpi_evalf(NULL, NULL,
3856                                  "\\_SB.PHS2", "vdd",
3857                                  TP_ACPI_VIDEO_570_PHS2CMD,
3858                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3859                 break;
3860         case TPACPI_VIDEO_770:
3861                 autosw = video_autosw_get();
3862                 if (autosw < 0)
3863                         return autosw;
3864
3865                 res = video_autosw_set(1);
3866                 if (res)
3867                         return res;
3868                 res = acpi_evalf(vid_handle, NULL,
3869                                  "ASWT", "vdd", status * 0x100, 0);
3870                 if (!autosw && video_autosw_set(autosw)) {
3871                         printk(TPACPI_ERR
3872                                "video auto-switch left enabled due to error\n");
3873                         return -EIO;
3874                 }
3875                 break;
3876         case TPACPI_VIDEO_NEW:
3877                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3878                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3879                 break;
3880         default:
3881                 return -ENOSYS;
3882         }
3883
3884         return (res)? 0 : -EIO;
3885 }
3886
3887 static int video_autosw_get(void)
3888 {
3889         int autosw = 0;
3890
3891         switch (video_supported) {
3892         case TPACPI_VIDEO_570:
3893                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3894                         return -EIO;
3895                 break;
3896         case TPACPI_VIDEO_770:
3897         case TPACPI_VIDEO_NEW:
3898                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3899                         return -EIO;
3900                 break;
3901         default:
3902                 return -ENOSYS;
3903         }
3904
3905         return autosw & 1;
3906 }
3907
3908 static int video_autosw_set(int enable)
3909 {
3910         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3911                 return -EIO;
3912         return 0;
3913 }
3914
3915 static int video_outputsw_cycle(void)
3916 {
3917         int autosw = video_autosw_get();
3918         int res;
3919
3920         if (autosw < 0)
3921                 return autosw;
3922
3923         switch (video_supported) {
3924         case TPACPI_VIDEO_570:
3925                 res = video_autosw_set(1);
3926                 if (res)
3927                         return res;
3928                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3929                 break;
3930         case TPACPI_VIDEO_770:
3931         case TPACPI_VIDEO_NEW:
3932                 res = video_autosw_set(1);
3933                 if (res)
3934                         return res;
3935                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3936                 break;
3937         default:
3938                 return -ENOSYS;
3939         }
3940         if (!autosw && video_autosw_set(autosw)) {
3941                 printk(TPACPI_ERR
3942                        "video auto-switch left enabled due to error\n");
3943                 return -EIO;
3944         }
3945
3946         return (res)? 0 : -EIO;
3947 }
3948
3949 static int video_expand_toggle(void)
3950 {
3951         switch (video_supported) {
3952         case TPACPI_VIDEO_570:
3953                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3954                         0 : -EIO;
3955         case TPACPI_VIDEO_770:
3956                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3957                         0 : -EIO;
3958         case TPACPI_VIDEO_NEW:
3959                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3960                         0 : -EIO;
3961         default:
3962                 return -ENOSYS;
3963         }
3964         /* not reached */
3965 }
3966
3967 static int video_read(char *p)
3968 {
3969         int status, autosw;
3970         int len = 0;
3971
3972         if (video_supported == TPACPI_VIDEO_NONE) {
3973                 len += sprintf(p + len, "status:\t\tnot supported\n");
3974                 return len;
3975         }
3976
3977         status = video_outputsw_get();
3978         if (status < 0)
3979                 return status;
3980
3981         autosw = video_autosw_get();
3982         if (autosw < 0)
3983                 return autosw;
3984
3985         len += sprintf(p + len, "status:\t\tsupported\n");
3986         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3987         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3988         if (video_supported == TPACPI_VIDEO_NEW)
3989                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3990         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3991         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3992         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3993         if (video_supported == TPACPI_VIDEO_NEW)
3994                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3995         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3996         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3997
3998         return len;
3999 }
4000
4001 static int video_write(char *buf)
4002 {
4003         char *cmd;
4004         int enable, disable, status;
4005         int res;
4006
4007         if (video_supported == TPACPI_VIDEO_NONE)
4008                 return -ENODEV;
4009
4010         enable = 0;
4011         disable = 0;
4012
4013         while ((cmd = next_cmd(&buf))) {
4014                 if (strlencmp(cmd, "lcd_enable") == 0) {
4015                         enable |= TP_ACPI_VIDEO_S_LCD;
4016                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
4017                         disable |= TP_ACPI_VIDEO_S_LCD;
4018                 } else if (strlencmp(cmd, "crt_enable") == 0) {
4019                         enable |= TP_ACPI_VIDEO_S_CRT;
4020                 } else if (strlencmp(cmd, "crt_disable") == 0) {
4021                         disable |= TP_ACPI_VIDEO_S_CRT;
4022                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4023                            strlencmp(cmd, "dvi_enable") == 0) {
4024                         enable |= TP_ACPI_VIDEO_S_DVI;
4025                 } else if (video_supported == TPACPI_VIDEO_NEW &&
4026                            strlencmp(cmd, "dvi_disable") == 0) {
4027                         disable |= TP_ACPI_VIDEO_S_DVI;
4028                 } else if (strlencmp(cmd, "auto_enable") == 0) {
4029                         res = video_autosw_set(1);
4030                         if (res)
4031                                 return res;
4032                 } else if (strlencmp(cmd, "auto_disable") == 0) {
4033                         res = video_autosw_set(0);
4034                         if (res)
4035                                 return res;
4036                 } else if (strlencmp(cmd, "video_switch") == 0) {
4037                         res = video_outputsw_cycle();
4038                         if (res)
4039                                 return res;
4040                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
4041                         res = video_expand_toggle();
4042                         if (res)
4043                                 return res;
4044                 } else
4045                         return -EINVAL;
4046         }
4047
4048         if (enable || disable) {
4049                 status = video_outputsw_get();
4050                 if (status < 0)
4051                         return status;
4052                 res = video_outputsw_set((status & ~disable) | enable);
4053                 if (res)
4054                         return res;
4055         }
4056
4057         return 0;
4058 }
4059
4060 static struct ibm_struct video_driver_data = {
4061         .name = "video",
4062         .read = video_read,
4063         .write = video_write,
4064         .exit = video_exit,
4065 };
4066
4067 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
4068
4069 /*************************************************************************
4070  * Light (thinklight) subdriver
4071  */
4072
4073 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
4074 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
4075
4076 static int light_get_status(void)
4077 {
4078         int status = 0;
4079
4080         if (tp_features.light_status) {
4081                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
4082                         return -EIO;
4083                 return (!!status);
4084         }
4085
4086         return -ENXIO;
4087 }
4088
4089 static int light_set_status(int status)
4090 {
4091         int rc;
4092
4093         if (tp_features.light) {
4094                 if (cmos_handle) {
4095                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
4096                                         (status)?
4097                                                 TP_CMOS_THINKLIGHT_ON :
4098                                                 TP_CMOS_THINKLIGHT_OFF);
4099                 } else {
4100                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
4101                                         (status)? 1 : 0);
4102                 }
4103                 return (rc)? 0 : -EIO;
4104         }
4105
4106         return -ENXIO;
4107 }
4108
4109 static void light_set_status_worker(struct work_struct *work)
4110 {
4111         struct tpacpi_led_classdev *data =
4112                         container_of(work, struct tpacpi_led_classdev, work);
4113
4114         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4115                 light_set_status((data->new_brightness != LED_OFF));
4116 }
4117
4118 static void light_sysfs_set(struct led_classdev *led_cdev,
4119                         enum led_brightness brightness)
4120 {
4121         struct tpacpi_led_classdev *data =
4122                 container_of(led_cdev,
4123                              struct tpacpi_led_classdev,
4124                              led_classdev);
4125         data->new_brightness = brightness;
4126         queue_work(tpacpi_wq, &data->work);
4127 }
4128
4129 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
4130 {
4131         return (light_get_status() == 1)? LED_FULL : LED_OFF;
4132 }
4133
4134 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
4135         .led_classdev = {
4136                 .name           = "tpacpi::thinklight",
4137                 .brightness_set = &light_sysfs_set,
4138                 .brightness_get = &light_sysfs_get,
4139         }
4140 };
4141
4142 static int __init light_init(struct ibm_init_struct *iibm)
4143 {
4144         int rc;
4145
4146         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
4147
4148         TPACPI_ACPIHANDLE_INIT(ledb);
4149         TPACPI_ACPIHANDLE_INIT(lght);
4150         TPACPI_ACPIHANDLE_INIT(cmos);
4151         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
4152
4153         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
4154         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
4155
4156         if (tp_features.light)
4157                 /* light status not supported on
4158                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
4159                 tp_features.light_status =
4160                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
4161
4162         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
4163                 str_supported(tp_features.light),
4164                 str_supported(tp_features.light_status));
4165
4166         if (!tp_features.light)
4167                 return 1;
4168
4169         rc = led_classdev_register(&tpacpi_pdev->dev,
4170                                    &tpacpi_led_thinklight.led_classdev);
4171
4172         if (rc < 0) {
4173                 tp_features.light = 0;
4174                 tp_features.light_status = 0;
4175         } else  {
4176                 rc = 0;
4177         }
4178
4179         return rc;
4180 }
4181
4182 static void light_exit(void)
4183 {
4184         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
4185         if (work_pending(&tpacpi_led_thinklight.work))
4186                 flush_workqueue(tpacpi_wq);
4187 }
4188
4189 static int light_read(char *p)
4190 {
4191         int len = 0;
4192         int status;
4193
4194         if (!tp_features.light) {
4195                 len += sprintf(p + len, "status:\t\tnot supported\n");
4196         } else if (!tp_features.light_status) {
4197                 len += sprintf(p + len, "status:\t\tunknown\n");
4198                 len += sprintf(p + len, "commands:\ton, off\n");
4199         } else {
4200                 status = light_get_status();
4201                 if (status < 0)
4202                         return status;
4203                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
4204                 len += sprintf(p + len, "commands:\ton, off\n");
4205         }
4206
4207         return len;
4208 }
4209
4210 static int light_write(char *buf)
4211 {
4212         char *cmd;
4213         int newstatus = 0;
4214
4215         if (!tp_features.light)
4216                 return -ENODEV;
4217
4218         while ((cmd = next_cmd(&buf))) {
4219                 if (strlencmp(cmd, "on") == 0) {
4220                         newstatus = 1;
4221                 } else if (strlencmp(cmd, "off") == 0) {
4222                         newstatus = 0;
4223                 } else
4224                         return -EINVAL;
4225         }
4226
4227         return light_set_status(newstatus);
4228 }
4229
4230 static struct ibm_struct light_driver_data = {
4231         .name = "light",
4232         .read = light_read,
4233         .write = light_write,
4234         .exit = light_exit,
4235 };
4236
4237 /*************************************************************************
4238  * Dock subdriver
4239  */
4240
4241 #ifdef CONFIG_THINKPAD_ACPI_DOCK
4242
4243 static void dock_notify(struct ibm_struct *ibm, u32 event);
4244 static int dock_read(char *p);
4245 static int dock_write(char *buf);
4246
4247 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
4248            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
4249            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
4250            "\\_SB.PCI.ISA.SLCE",        /* 570 */
4251     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
4252
4253 /* don't list other alternatives as we install a notify handler on the 570 */
4254 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
4255
4256 static const struct acpi_device_id ibm_pci_device_ids[] = {
4257         {PCI_ROOT_HID_STRING, 0},
4258         {"", 0},
4259 };
4260
4261 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
4262         {
4263          .notify = dock_notify,
4264          .handle = &dock_handle,
4265          .type = ACPI_SYSTEM_NOTIFY,
4266         },
4267         {
4268         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
4269          * We just use it to get notifications of dock hotplug
4270          * in very old thinkpads */
4271          .hid = ibm_pci_device_ids,
4272          .notify = dock_notify,
4273          .handle = &pci_handle,
4274          .type = ACPI_SYSTEM_NOTIFY,
4275         },
4276 };
4277
4278 static struct ibm_struct dock_driver_data[2] = {
4279         {
4280          .name = "dock",
4281          .read = dock_read,
4282          .write = dock_write,
4283          .acpi = &ibm_dock_acpidriver[0],
4284         },
4285         {
4286          .name = "dock",
4287          .acpi = &ibm_dock_acpidriver[1],
4288         },
4289 };
4290
4291 #define dock_docked() (_sta(dock_handle) & 1)
4292
4293 static int __init dock_init(struct ibm_init_struct *iibm)
4294 {
4295         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
4296
4297         TPACPI_ACPIHANDLE_INIT(dock);
4298
4299         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
4300                 str_supported(dock_handle != NULL));
4301
4302         return (dock_handle)? 0 : 1;
4303 }
4304
4305 static int __init dock_init2(struct ibm_init_struct *iibm)
4306 {
4307         int dock2_needed;
4308
4309         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
4310
4311         if (dock_driver_data[0].flags.acpi_driver_registered &&
4312             dock_driver_data[0].flags.acpi_notify_installed) {
4313                 TPACPI_ACPIHANDLE_INIT(pci);
4314                 dock2_needed = (pci_handle != NULL);
4315                 vdbg_printk(TPACPI_DBG_INIT,
4316                             "dock PCI handler for the TP 570 is %s\n",
4317                             str_supported(dock2_needed));
4318         } else {
4319                 vdbg_printk(TPACPI_DBG_INIT,
4320                 "dock subdriver part 2 not required\n");
4321                 dock2_needed = 0;
4322         }
4323
4324         return (dock2_needed)? 0 : 1;
4325 }
4326
4327 static void dock_notify(struct ibm_struct *ibm, u32 event)
4328 {
4329         int docked = dock_docked();
4330         int pci = ibm->acpi->hid && ibm->acpi->device &&
4331                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
4332         int data;
4333
4334         if (event == 1 && !pci) /* 570 */
4335                 data = 1;       /* button */
4336         else if (event == 1 && pci)     /* 570 */
4337                 data = 3;       /* dock */
4338         else if (event == 3 && docked)
4339                 data = 1;       /* button */
4340         else if (event == 3 && !docked)
4341                 data = 2;       /* undock */
4342         else if (event == 0 && docked)
4343                 data = 3;       /* dock */
4344         else {
4345                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
4346                        event, _sta(dock_handle));
4347                 data = 0;       /* unknown */
4348         }
4349         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
4350         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4351                                           dev_name(&ibm->acpi->device->dev),
4352                                           event, data);
4353 }
4354
4355 static int dock_read(char *p)
4356 {
4357         int len = 0;
4358         int docked = dock_docked();
4359
4360         if (!dock_handle)
4361                 len += sprintf(p + len, "status:\t\tnot supported\n");
4362         else if (!docked)
4363                 len += sprintf(p + len, "status:\t\tundocked\n");
4364         else {
4365                 len += sprintf(p + len, "status:\t\tdocked\n");
4366                 len += sprintf(p + len, "commands:\tdock, undock\n");
4367         }
4368
4369         return len;
4370 }
4371
4372 static int dock_write(char *buf)
4373 {
4374         char *cmd;
4375
4376         if (!dock_docked())
4377                 return -ENODEV;
4378
4379         while ((cmd = next_cmd(&buf))) {
4380                 if (strlencmp(cmd, "undock") == 0) {
4381                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
4382                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
4383                                 return -EIO;
4384                 } else if (strlencmp(cmd, "dock") == 0) {
4385                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
4386                                 return -EIO;
4387                 } else
4388                         return -EINVAL;
4389         }
4390
4391         return 0;
4392 }
4393
4394 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
4395
4396 /*************************************************************************
4397  * Bay subdriver
4398  */
4399
4400 #ifdef CONFIG_THINKPAD_ACPI_BAY
4401
4402 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
4403            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
4404            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
4405            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
4406            );                           /* A21e, R30, R31 */
4407 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
4408            "_EJ0",              /* all others */
4409            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
4410 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
4411            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
4412            );                           /* all others */
4413 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
4414            "_EJ0",                      /* 770x */
4415            );                           /* all others */
4416
4417 static int __init bay_init(struct ibm_init_struct *iibm)
4418 {
4419         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
4420
4421         TPACPI_ACPIHANDLE_INIT(bay);
4422         if (bay_handle)
4423                 TPACPI_ACPIHANDLE_INIT(bay_ej);
4424         TPACPI_ACPIHANDLE_INIT(bay2);
4425         if (bay2_handle)
4426                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
4427
4428         tp_features.bay_status = bay_handle &&
4429                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
4430         tp_features.bay_status2 = bay2_handle &&
4431                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
4432
4433         tp_features.bay_eject = bay_handle && bay_ej_handle &&
4434                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
4435         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
4436                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
4437
4438         vdbg_printk(TPACPI_DBG_INIT,
4439                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
4440                 str_supported(tp_features.bay_status),
4441                 str_supported(tp_features.bay_eject),
4442                 str_supported(tp_features.bay_status2),
4443                 str_supported(tp_features.bay_eject2));
4444
4445         return (tp_features.bay_status || tp_features.bay_eject ||
4446                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
4447 }
4448
4449 static void bay_notify(struct ibm_struct *ibm, u32 event)
4450 {
4451         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
4452         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
4453                                           dev_name(&ibm->acpi->device->dev),
4454                                           event, 0);
4455 }
4456
4457 #define bay_occupied(b) (_sta(b##_handle) & 1)
4458
4459 static int bay_read(char *p)
4460 {
4461         int len = 0;
4462         int occupied = bay_occupied(bay);
4463         int occupied2 = bay_occupied(bay2);
4464         int eject, eject2;
4465
4466         len += sprintf(p + len, "status:\t\t%s\n",
4467                 tp_features.bay_status ?
4468                         (occupied ? "occupied" : "unoccupied") :
4469                                 "not supported");
4470         if (tp_features.bay_status2)
4471                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
4472                                "occupied" : "unoccupied");
4473
4474         eject = tp_features.bay_eject && occupied;
4475         eject2 = tp_features.bay_eject2 && occupied2;
4476
4477         if (eject && eject2)
4478                 len += sprintf(p + len, "commands:\teject, eject2\n");
4479         else if (eject)
4480                 len += sprintf(p + len, "commands:\teject\n");
4481         else if (eject2)
4482                 len += sprintf(p + len, "commands:\teject2\n");
4483
4484         return len;
4485 }
4486
4487 static int bay_write(char *buf)
4488 {
4489         char *cmd;
4490
4491         if (!tp_features.bay_eject && !tp_features.bay_eject2)
4492                 return -ENODEV;
4493
4494         while ((cmd = next_cmd(&buf))) {
4495                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
4496                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
4497                                 return -EIO;
4498                 } else if (tp_features.bay_eject2 &&
4499                            strlencmp(cmd, "eject2") == 0) {
4500                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
4501                                 return -EIO;
4502                 } else
4503                         return -EINVAL;
4504         }
4505
4506         return 0;
4507 }
4508
4509 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
4510         .notify = bay_notify,
4511         .handle = &bay_handle,
4512         .type = ACPI_SYSTEM_NOTIFY,
4513 };
4514
4515 static struct ibm_struct bay_driver_data = {
4516         .name = "bay",
4517         .read = bay_read,
4518         .write = bay_write,
4519         .acpi = &ibm_bay_acpidriver,
4520 };
4521
4522 #endif /* CONFIG_THINKPAD_ACPI_BAY */
4523
4524 /*************************************************************************
4525  * CMOS subdriver
4526  */
4527
4528 /* sysfs cmos_command -------------------------------------------------- */
4529 static ssize_t cmos_command_store(struct device *dev,
4530                             struct device_attribute *attr,
4531                             const char *buf, size_t count)
4532 {
4533         unsigned long cmos_cmd;
4534         int res;
4535
4536         if (parse_strtoul(buf, 21, &cmos_cmd))
4537                 return -EINVAL;
4538
4539         res = issue_thinkpad_cmos_command(cmos_cmd);
4540         return (res)? res : count;
4541 }
4542
4543 static struct device_attribute dev_attr_cmos_command =
4544         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
4545
4546 /* --------------------------------------------------------------------- */
4547
4548 static int __init cmos_init(struct ibm_init_struct *iibm)
4549 {
4550         int res;
4551
4552         vdbg_printk(TPACPI_DBG_INIT,
4553                 "initializing cmos commands subdriver\n");
4554
4555         TPACPI_ACPIHANDLE_INIT(cmos);
4556
4557         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
4558                 str_supported(cmos_handle != NULL));
4559
4560         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4561         if (res)
4562                 return res;
4563
4564         return (cmos_handle)? 0 : 1;
4565 }
4566
4567 static void cmos_exit(void)
4568 {
4569         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
4570 }
4571
4572 static int cmos_read(char *p)
4573 {
4574         int len = 0;
4575
4576         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
4577            R30, R31, T20-22, X20-21 */
4578         if (!cmos_handle)
4579                 len += sprintf(p + len, "status:\t\tnot supported\n");
4580         else {
4581                 len += sprintf(p + len, "status:\t\tsupported\n");
4582                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
4583         }
4584
4585         return len;
4586 }
4587
4588 static int cmos_write(char *buf)
4589 {
4590         char *cmd;
4591         int cmos_cmd, res;
4592
4593         while ((cmd = next_cmd(&buf))) {
4594                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
4595                     cmos_cmd >= 0 && cmos_cmd <= 21) {
4596                         /* cmos_cmd set */
4597                 } else
4598                         return -EINVAL;
4599
4600                 res = issue_thinkpad_cmos_command(cmos_cmd);
4601                 if (res)
4602                         return res;
4603         }
4604
4605         return 0;
4606 }
4607
4608 static struct ibm_struct cmos_driver_data = {
4609         .name = "cmos",
4610         .read = cmos_read,
4611         .write = cmos_write,
4612         .exit = cmos_exit,
4613 };
4614
4615 /*************************************************************************
4616  * LED subdriver
4617  */
4618
4619 enum led_access_mode {
4620         TPACPI_LED_NONE = 0,
4621         TPACPI_LED_570, /* 570 */
4622         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4623         TPACPI_LED_NEW, /* all others */
4624 };
4625
4626 enum {  /* For TPACPI_LED_OLD */
4627         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
4628         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
4629         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
4630 };
4631
4632 enum led_status_t {
4633         TPACPI_LED_OFF = 0,
4634         TPACPI_LED_ON,
4635         TPACPI_LED_BLINK,
4636 };
4637
4638 static enum led_access_mode led_supported;
4639
4640 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
4641            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
4642                                 /* T20-22, X20-21 */
4643            "LED",               /* all others */
4644            );                   /* R30, R31 */
4645
4646 #define TPACPI_LED_NUMLEDS 8
4647 static struct tpacpi_led_classdev *tpacpi_leds;
4648 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
4649 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
4650         /* there's a limit of 19 chars + NULL before 2.6.26 */
4651         "tpacpi::power",
4652         "tpacpi:orange:batt",
4653         "tpacpi:green:batt",
4654         "tpacpi::dock_active",
4655         "tpacpi::bay_active",
4656         "tpacpi::dock_batt",
4657         "tpacpi::unknown_led",
4658         "tpacpi::standby",
4659 };
4660 #define TPACPI_SAFE_LEDS        0x0081U
4661
4662 static inline bool tpacpi_is_led_restricted(const unsigned int led)
4663 {
4664 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4665         return false;
4666 #else
4667         return (TPACPI_SAFE_LEDS & (1 << led)) == 0;
4668 #endif
4669 }
4670
4671 static int led_get_status(const unsigned int led)
4672 {
4673         int status;
4674         enum led_status_t led_s;
4675
4676         switch (led_supported) {
4677         case TPACPI_LED_570:
4678                 if (!acpi_evalf(ec_handle,
4679                                 &status, "GLED", "dd", 1 << led))
4680                         return -EIO;
4681                 led_s = (status == 0)?
4682                                 TPACPI_LED_OFF :
4683                                 ((status == 1)?
4684                                         TPACPI_LED_ON :
4685                                         TPACPI_LED_BLINK);
4686                 tpacpi_led_state_cache[led] = led_s;
4687                 return led_s;
4688         default:
4689                 return -ENXIO;
4690         }
4691
4692         /* not reached */
4693 }
4694
4695 static int led_set_status(const unsigned int led,
4696                           const enum led_status_t ledstatus)
4697 {
4698         /* off, on, blink. Index is led_status_t */
4699         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
4700         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
4701
4702         int rc = 0;
4703
4704         switch (led_supported) {
4705         case TPACPI_LED_570:
4706                 /* 570 */
4707                 if (unlikely(led > 7))
4708                         return -EINVAL;
4709                 if (unlikely(tpacpi_is_led_restricted(led)))
4710                         return -EPERM;
4711                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4712                                 (1 << led), led_sled_arg1[ledstatus]))
4713                         rc = -EIO;
4714                 break;
4715         case TPACPI_LED_OLD:
4716                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
4717                 if (unlikely(led > 7))
4718                         return -EINVAL;
4719                 if (unlikely(tpacpi_is_led_restricted(led)))
4720                         return -EPERM;
4721                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
4722                 if (rc >= 0)
4723                         rc = ec_write(TPACPI_LED_EC_HLBL,
4724                                       (ledstatus == TPACPI_LED_BLINK) << led);
4725                 if (rc >= 0)
4726                         rc = ec_write(TPACPI_LED_EC_HLCL,
4727                                       (ledstatus != TPACPI_LED_OFF) << led);
4728                 break;
4729         case TPACPI_LED_NEW:
4730                 /* all others */
4731                 if (unlikely(led >= TPACPI_LED_NUMLEDS))
4732                         return -EINVAL;
4733                 if (unlikely(tpacpi_is_led_restricted(led)))
4734                         return -EPERM;
4735                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
4736                                 led, led_led_arg1[ledstatus]))
4737                         rc = -EIO;
4738                 break;
4739         default:
4740                 rc = -ENXIO;
4741         }
4742
4743         if (!rc)
4744                 tpacpi_led_state_cache[led] = ledstatus;
4745
4746         return rc;
4747 }
4748
4749 static void led_sysfs_set_status(unsigned int led,
4750                                  enum led_brightness brightness)
4751 {
4752         led_set_status(led,
4753                         (brightness == LED_OFF) ?
4754                         TPACPI_LED_OFF :
4755                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
4756                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
4757 }
4758
4759 static void led_set_status_worker(struct work_struct *work)
4760 {
4761         struct tpacpi_led_classdev *data =
4762                 container_of(work, struct tpacpi_led_classdev, work);
4763
4764         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
4765                 led_sysfs_set_status(data->led, data->new_brightness);
4766 }
4767
4768 static void led_sysfs_set(struct led_classdev *led_cdev,
4769                         enum led_brightness brightness)
4770 {
4771         struct tpacpi_led_classdev *data = container_of(led_cdev,
4772                              struct tpacpi_led_classdev, led_classdev);
4773
4774         data->new_brightness = brightness;
4775         queue_work(tpacpi_wq, &data->work);
4776 }
4777
4778 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
4779                         unsigned long *delay_on, unsigned long *delay_off)
4780 {
4781         struct tpacpi_led_classdev *data = container_of(led_cdev,
4782                              struct tpacpi_led_classdev, led_classdev);
4783
4784         /* Can we choose the flash rate? */
4785         if (*delay_on == 0 && *delay_off == 0) {
4786                 /* yes. set them to the hardware blink rate (1 Hz) */
4787                 *delay_on = 500; /* ms */
4788                 *delay_off = 500; /* ms */
4789         } else if ((*delay_on != 500) || (*delay_off != 500))
4790                 return -EINVAL;
4791
4792         data->new_brightness = TPACPI_LED_BLINK;
4793         queue_work(tpacpi_wq, &data->work);
4794
4795         return 0;
4796 }
4797
4798 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
4799 {
4800         int rc;
4801
4802         struct tpacpi_led_classdev *data = container_of(led_cdev,
4803                              struct tpacpi_led_classdev, led_classdev);
4804
4805         rc = led_get_status(data->led);
4806
4807         if (rc == TPACPI_LED_OFF || rc < 0)
4808                 rc = LED_OFF;   /* no error handling in led class :( */
4809         else
4810                 rc = LED_FULL;
4811
4812         return rc;
4813 }
4814
4815 static void led_exit(void)
4816 {
4817         unsigned int i;
4818
4819         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4820                 if (tpacpi_leds[i].led_classdev.name)
4821                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4822         }
4823
4824         kfree(tpacpi_leds);
4825 }
4826
4827 static int __init tpacpi_init_led(unsigned int led)
4828 {
4829         int rc;
4830
4831         tpacpi_leds[led].led = led;
4832
4833         tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set;
4834         tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set;
4835         if (led_supported == TPACPI_LED_570)
4836                 tpacpi_leds[led].led_classdev.brightness_get =
4837                                                 &led_sysfs_get;
4838
4839         tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led];
4840
4841         INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker);
4842
4843         rc = led_classdev_register(&tpacpi_pdev->dev,
4844                                 &tpacpi_leds[led].led_classdev);
4845         if (rc < 0)
4846                 tpacpi_leds[led].led_classdev.name = NULL;
4847
4848         return rc;
4849 }
4850
4851 static int __init led_init(struct ibm_init_struct *iibm)
4852 {
4853         unsigned int i;
4854         int rc;
4855
4856         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4857
4858         TPACPI_ACPIHANDLE_INIT(led);
4859
4860         if (!led_handle)
4861                 /* led not supported on R30, R31 */
4862                 led_supported = TPACPI_LED_NONE;
4863         else if (strlencmp(led_path, "SLED") == 0)
4864                 /* 570 */
4865                 led_supported = TPACPI_LED_570;
4866         else if (strlencmp(led_path, "SYSL") == 0)
4867                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4868                 led_supported = TPACPI_LED_OLD;
4869         else
4870                 /* all others */
4871                 led_supported = TPACPI_LED_NEW;
4872
4873         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4874                 str_supported(led_supported), led_supported);
4875
4876         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4877                               GFP_KERNEL);
4878         if (!tpacpi_leds) {
4879                 printk(TPACPI_ERR "Out of memory for LED data\n");
4880                 return -ENOMEM;
4881         }
4882
4883         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4884                 if (!tpacpi_is_led_restricted(i)) {
4885                         rc = tpacpi_init_led(i);
4886                         if (rc < 0) {
4887                                 led_exit();
4888                                 return rc;
4889                         }
4890                 }
4891         }
4892
4893 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS
4894         if (led_supported != TPACPI_LED_NONE)
4895                 printk(TPACPI_NOTICE
4896                         "warning: userspace override of important "
4897                         "firmware LEDs is enabled\n");
4898 #endif
4899         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4900 }
4901
4902 #define str_led_status(s) \
4903         ((s) == TPACPI_LED_OFF ? "off" : \
4904                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4905
4906 static int led_read(char *p)
4907 {
4908         int len = 0;
4909
4910         if (!led_supported) {
4911                 len += sprintf(p + len, "status:\t\tnot supported\n");
4912                 return len;
4913         }
4914         len += sprintf(p + len, "status:\t\tsupported\n");
4915
4916         if (led_supported == TPACPI_LED_570) {
4917                 /* 570 */
4918                 int i, status;
4919                 for (i = 0; i < 8; i++) {
4920                         status = led_get_status(i);
4921                         if (status < 0)
4922                                 return -EIO;
4923                         len += sprintf(p + len, "%d:\t\t%s\n",
4924                                        i, str_led_status(status));
4925                 }
4926         }
4927
4928         len += sprintf(p + len, "commands:\t"
4929                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4930
4931         return len;
4932 }
4933
4934 static int led_write(char *buf)
4935 {
4936         char *cmd;
4937         int led, rc;
4938         enum led_status_t s;
4939
4940         if (!led_supported)
4941                 return -ENODEV;
4942
4943         while ((cmd = next_cmd(&buf))) {
4944                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4945                         return -EINVAL;
4946
4947                 if (strstr(cmd, "off")) {
4948                         s = TPACPI_LED_OFF;
4949                 } else if (strstr(cmd, "on")) {
4950                         s = TPACPI_LED_ON;
4951                 } else if (strstr(cmd, "blink")) {
4952                         s = TPACPI_LED_BLINK;
4953                 } else {
4954                         return -EINVAL;
4955                 }
4956
4957                 rc = led_set_status(led, s);
4958                 if (rc < 0)
4959                         return rc;
4960         }
4961
4962         return 0;
4963 }
4964
4965 static struct ibm_struct led_driver_data = {
4966         .name = "led",
4967         .read = led_read,
4968         .write = led_write,
4969         .exit = led_exit,
4970 };
4971
4972 /*************************************************************************
4973  * Beep subdriver
4974  */
4975
4976 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4977
4978 static int __init beep_init(struct ibm_init_struct *iibm)
4979 {
4980         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4981
4982         TPACPI_ACPIHANDLE_INIT(beep);
4983
4984         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4985                 str_supported(beep_handle != NULL));
4986
4987         return (beep_handle)? 0 : 1;
4988 }
4989
4990 static int beep_read(char *p)
4991 {
4992         int len = 0;
4993
4994         if (!beep_handle)
4995                 len += sprintf(p + len, "status:\t\tnot supported\n");
4996         else {
4997                 len += sprintf(p + len, "status:\t\tsupported\n");
4998                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4999         }
5000
5001         return len;
5002 }
5003
5004 static int beep_write(char *buf)
5005 {
5006         char *cmd;
5007         int beep_cmd;
5008
5009         if (!beep_handle)
5010                 return -ENODEV;
5011
5012         while ((cmd = next_cmd(&buf))) {
5013                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
5014                     beep_cmd >= 0 && beep_cmd <= 17) {
5015                         /* beep_cmd set */
5016                 } else
5017                         return -EINVAL;
5018                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
5019                         return -EIO;
5020         }
5021
5022         return 0;
5023 }
5024
5025 static struct ibm_struct beep_driver_data = {
5026         .name = "beep",
5027         .read = beep_read,
5028         .write = beep_write,
5029 };
5030
5031 /*************************************************************************
5032  * Thermal subdriver
5033  */
5034
5035 enum thermal_access_mode {
5036         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
5037         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
5038         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
5039         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
5040         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
5041 };
5042
5043 enum { /* TPACPI_THERMAL_TPEC_* */
5044         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
5045         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
5046         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
5047 };
5048
5049 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
5050 struct ibm_thermal_sensors_struct {
5051         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
5052 };
5053
5054 static enum thermal_access_mode thermal_read_mode;
5055
5056 /* idx is zero-based */
5057 static int thermal_get_sensor(int idx, s32 *value)
5058 {
5059         int t;
5060         s8 tmp;
5061         char tmpi[5];
5062
5063         t = TP_EC_THERMAL_TMP0;
5064
5065         switch (thermal_read_mode) {
5066 #if TPACPI_MAX_THERMAL_SENSORS >= 16
5067         case TPACPI_THERMAL_TPEC_16:
5068                 if (idx >= 8 && idx <= 15) {
5069                         t = TP_EC_THERMAL_TMP8;
5070                         idx -= 8;
5071                 }
5072                 /* fallthrough */
5073 #endif
5074         case TPACPI_THERMAL_TPEC_8:
5075                 if (idx <= 7) {
5076                         if (!acpi_ec_read(t + idx, &tmp))
5077                                 return -EIO;
5078                         *value = tmp * 1000;
5079                         return 0;
5080                 }
5081                 break;
5082
5083         case TPACPI_THERMAL_ACPI_UPDT:
5084                 if (idx <= 7) {
5085                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5086                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
5087                                 return -EIO;
5088                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5089                                 return -EIO;
5090                         *value = (t - 2732) * 100;
5091                         return 0;
5092                 }
5093                 break;
5094
5095         case TPACPI_THERMAL_ACPI_TMP07:
5096                 if (idx <= 7) {
5097                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
5098                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
5099                                 return -EIO;
5100                         if (t > 127 || t < -127)
5101                                 t = TP_EC_THERMAL_TMP_NA;
5102                         *value = t * 1000;
5103                         return 0;
5104                 }
5105                 break;
5106
5107         case TPACPI_THERMAL_NONE:
5108         default:
5109                 return -ENOSYS;
5110         }
5111
5112         return -EINVAL;
5113 }
5114
5115 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
5116 {
5117         int res, i;
5118         int n;
5119
5120         n = 8;
5121         i = 0;
5122
5123         if (!s)
5124                 return -EINVAL;
5125
5126         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
5127                 n = 16;
5128
5129         for (i = 0 ; i < n; i++) {
5130                 res = thermal_get_sensor(i, &s->temp[i]);
5131                 if (res)
5132                         return res;
5133         }
5134
5135         return n;
5136 }
5137
5138 /* sysfs temp##_input -------------------------------------------------- */
5139
5140 static ssize_t thermal_temp_input_show(struct device *dev,
5141                            struct device_attribute *attr,
5142                            char *buf)
5143 {
5144         struct sensor_device_attribute *sensor_attr =
5145                                         to_sensor_dev_attr(attr);
5146         int idx = sensor_attr->index;
5147         s32 value;
5148         int res;
5149
5150         res = thermal_get_sensor(idx, &value);
5151         if (res)
5152                 return res;
5153         if (value == TP_EC_THERMAL_TMP_NA * 1000)
5154                 return -ENXIO;
5155
5156         return snprintf(buf, PAGE_SIZE, "%d\n", value);
5157 }
5158
5159 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
5160          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
5161                      thermal_temp_input_show, NULL, _idxB)
5162
5163 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
5164         THERMAL_SENSOR_ATTR_TEMP(1, 0),
5165         THERMAL_SENSOR_ATTR_TEMP(2, 1),
5166         THERMAL_SENSOR_ATTR_TEMP(3, 2),
5167         THERMAL_SENSOR_ATTR_TEMP(4, 3),
5168         THERMAL_SENSOR_ATTR_TEMP(5, 4),
5169         THERMAL_SENSOR_ATTR_TEMP(6, 5),
5170         THERMAL_SENSOR_ATTR_TEMP(7, 6),
5171         THERMAL_SENSOR_ATTR_TEMP(8, 7),
5172         THERMAL_SENSOR_ATTR_TEMP(9, 8),
5173         THERMAL_SENSOR_ATTR_TEMP(10, 9),
5174         THERMAL_SENSOR_ATTR_TEMP(11, 10),
5175         THERMAL_SENSOR_ATTR_TEMP(12, 11),
5176         THERMAL_SENSOR_ATTR_TEMP(13, 12),
5177         THERMAL_SENSOR_ATTR_TEMP(14, 13),
5178         THERMAL_SENSOR_ATTR_TEMP(15, 14),
5179         THERMAL_SENSOR_ATTR_TEMP(16, 15),
5180 };
5181
5182 #define THERMAL_ATTRS(X) \
5183         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
5184
5185 static struct attribute *thermal_temp_input_attr[] = {
5186         THERMAL_ATTRS(8),
5187         THERMAL_ATTRS(9),
5188         THERMAL_ATTRS(10),
5189         THERMAL_ATTRS(11),
5190         THERMAL_ATTRS(12),
5191         THERMAL_ATTRS(13),
5192         THERMAL_ATTRS(14),
5193         THERMAL_ATTRS(15),
5194         THERMAL_ATTRS(0),
5195         THERMAL_ATTRS(1),
5196         THERMAL_ATTRS(2),
5197         THERMAL_ATTRS(3),
5198         THERMAL_ATTRS(4),
5199         THERMAL_ATTRS(5),
5200         THERMAL_ATTRS(6),
5201         THERMAL_ATTRS(7),
5202         NULL
5203 };
5204
5205 static const struct attribute_group thermal_temp_input16_group = {
5206         .attrs = thermal_temp_input_attr
5207 };
5208
5209 static const struct attribute_group thermal_temp_input8_group = {
5210         .attrs = &thermal_temp_input_attr[8]
5211 };
5212
5213 #undef THERMAL_SENSOR_ATTR_TEMP
5214 #undef THERMAL_ATTRS
5215
5216 /* --------------------------------------------------------------------- */
5217
5218 static int __init thermal_init(struct ibm_init_struct *iibm)
5219 {
5220         u8 t, ta1, ta2;
5221         int i;
5222         int acpi_tmp7;
5223         int res;
5224
5225         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
5226
5227         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
5228
5229         if (thinkpad_id.ec_model) {
5230                 /*
5231                  * Direct EC access mode: sensors at registers
5232                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
5233                  * non-implemented, thermal sensors return 0x80 when
5234                  * not available
5235                  */
5236
5237                 ta1 = ta2 = 0;
5238                 for (i = 0; i < 8; i++) {
5239                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
5240                                 ta1 |= t;
5241                         } else {
5242                                 ta1 = 0;
5243                                 break;
5244                         }
5245                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
5246                                 ta2 |= t;
5247                         } else {
5248                                 ta1 = 0;
5249                                 break;
5250                         }
5251                 }
5252                 if (ta1 == 0) {
5253                         /* This is sheer paranoia, but we handle it anyway */
5254                         if (acpi_tmp7) {
5255                                 printk(TPACPI_ERR
5256                                        "ThinkPad ACPI EC access misbehaving, "
5257                                        "falling back to ACPI TMPx access "
5258                                        "mode\n");
5259                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5260                         } else {
5261                                 printk(TPACPI_ERR
5262                                        "ThinkPad ACPI EC access misbehaving, "
5263                                        "disabling thermal sensors access\n");
5264                                 thermal_read_mode = TPACPI_THERMAL_NONE;
5265                         }
5266                 } else {
5267                         thermal_read_mode =
5268                             (ta2 != 0) ?
5269                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
5270                 }
5271         } else if (acpi_tmp7) {
5272                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
5273                         /* 600e/x, 770e, 770x */
5274                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
5275                 } else {
5276                         /* Standard ACPI TMPx access, max 8 sensors */
5277                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
5278                 }
5279         } else {
5280                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
5281                 thermal_read_mode = TPACPI_THERMAL_NONE;
5282         }
5283
5284         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
5285                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
5286                 thermal_read_mode);
5287
5288         switch (thermal_read_mode) {
5289         case TPACPI_THERMAL_TPEC_16:
5290                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5291                                 &thermal_temp_input16_group);
5292                 if (res)
5293                         return res;
5294                 break;
5295         case TPACPI_THERMAL_TPEC_8:
5296         case TPACPI_THERMAL_ACPI_TMP07:
5297         case TPACPI_THERMAL_ACPI_UPDT:
5298                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5299                                 &thermal_temp_input8_group);
5300                 if (res)
5301                         return res;
5302                 break;
5303         case TPACPI_THERMAL_NONE:
5304         default:
5305                 return 1;
5306         }
5307
5308         return 0;
5309 }
5310
5311 static void thermal_exit(void)
5312 {
5313         switch (thermal_read_mode) {
5314         case TPACPI_THERMAL_TPEC_16:
5315                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5316                                    &thermal_temp_input16_group);
5317                 break;
5318         case TPACPI_THERMAL_TPEC_8:
5319         case TPACPI_THERMAL_ACPI_TMP07:
5320         case TPACPI_THERMAL_ACPI_UPDT:
5321                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5322                                    &thermal_temp_input16_group);
5323                 break;
5324         case TPACPI_THERMAL_NONE:
5325         default:
5326                 break;
5327         }
5328 }
5329
5330 static int thermal_read(char *p)
5331 {
5332         int len = 0;
5333         int n, i;
5334         struct ibm_thermal_sensors_struct t;
5335
5336         n = thermal_get_sensors(&t);
5337         if (unlikely(n < 0))
5338                 return n;
5339
5340         len += sprintf(p + len, "temperatures:\t");
5341
5342         if (n > 0) {
5343                 for (i = 0; i < (n - 1); i++)
5344                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
5345                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
5346         } else
5347                 len += sprintf(p + len, "not supported\n");
5348
5349         return len;
5350 }
5351
5352 static struct ibm_struct thermal_driver_data = {
5353         .name = "thermal",
5354         .read = thermal_read,
5355         .exit = thermal_exit,
5356 };
5357
5358 /*************************************************************************
5359  * EC Dump subdriver
5360  */
5361
5362 static u8 ecdump_regs[256];
5363
5364 static int ecdump_read(char *p)
5365 {
5366         int len = 0;
5367         int i, j;
5368         u8 v;
5369
5370         len += sprintf(p + len, "EC      "
5371                        " +00 +01 +02 +03 +04 +05 +06 +07"
5372                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
5373         for (i = 0; i < 256; i += 16) {
5374                 len += sprintf(p + len, "EC 0x%02x:", i);
5375                 for (j = 0; j < 16; j++) {
5376                         if (!acpi_ec_read(i + j, &v))
5377                                 break;
5378                         if (v != ecdump_regs[i + j])
5379                                 len += sprintf(p + len, " *%02x", v);
5380                         else
5381                                 len += sprintf(p + len, "  %02x", v);
5382                         ecdump_regs[i + j] = v;
5383                 }
5384                 len += sprintf(p + len, "\n");
5385                 if (j != 16)
5386                         break;
5387         }
5388
5389         /* These are way too dangerous to advertise openly... */
5390 #if 0
5391         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
5392                        " (<offset> is 00-ff, <value> is 00-ff)\n");
5393         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
5394                        " (<offset> is 00-ff, <value> is 0-255)\n");
5395 #endif
5396         return len;
5397 }
5398
5399 static int ecdump_write(char *buf)
5400 {
5401         char *cmd;
5402         int i, v;
5403
5404         while ((cmd = next_cmd(&buf))) {
5405                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
5406                         /* i and v set */
5407                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
5408                         /* i and v set */
5409                 } else
5410                         return -EINVAL;
5411                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
5412                         if (!acpi_ec_write(i, v))
5413                                 return -EIO;
5414                 } else
5415                         return -EINVAL;
5416         }
5417
5418         return 0;
5419 }
5420
5421 static struct ibm_struct ecdump_driver_data = {
5422         .name = "ecdump",
5423         .read = ecdump_read,
5424         .write = ecdump_write,
5425         .flags.experimental = 1,
5426 };
5427
5428 /*************************************************************************
5429  * Backlight/brightness subdriver
5430  */
5431
5432 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
5433
5434 enum {
5435         TP_EC_BACKLIGHT = 0x31,
5436
5437         /* TP_EC_BACKLIGHT bitmasks */
5438         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
5439         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
5440         TP_EC_BACKLIGHT_MAPSW = 0x20,
5441 };
5442
5443 static struct backlight_device *ibm_backlight_device;
5444 static int brightness_mode;
5445 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
5446
5447 static struct mutex brightness_mutex;
5448
5449 /*
5450  * ThinkPads can read brightness from two places: EC 0x31, or
5451  * CMOS NVRAM byte 0x5E, bits 0-3.
5452  *
5453  * EC 0x31 has the following layout
5454  *   Bit 7: unknown function
5455  *   Bit 6: unknown function
5456  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
5457  *   Bit 4: must be set to zero to avoid problems
5458  *   Bit 3-0: backlight brightness level
5459  *
5460  * brightness_get_raw returns status data in the EC 0x31 layout
5461  */
5462 static int brightness_get_raw(int *status)
5463 {
5464         u8 lec = 0, lcmos = 0, level = 0;
5465
5466         if (brightness_mode & 1) {
5467                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
5468                         return -EIO;
5469                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
5470         };
5471         if (brightness_mode & 2) {
5472                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
5473                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
5474                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
5475                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
5476                 level = lcmos;
5477         }
5478
5479         if (brightness_mode == 3) {
5480                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
5481                 lec &= TP_EC_BACKLIGHT_LVLMSK;
5482                 if (lec == lcmos)
5483                         tp_warned.bright_cmos_ec_unsync = 0;
5484                 else {
5485                         if (!tp_warned.bright_cmos_ec_unsync) {
5486                                 printk(TPACPI_ERR
5487                                         "CMOS NVRAM (%u) and EC (%u) do not "
5488                                         "agree on display brightness level\n",
5489                                         (unsigned int) lcmos,
5490                                         (unsigned int) lec);
5491                                 tp_warned.bright_cmos_ec_unsync = 1;
5492                         }
5493                         return -EIO;
5494                 }
5495         } else {
5496                 *status = level;
5497         }
5498
5499         return 0;
5500 }
5501
5502 /* May return EINTR which can always be mapped to ERESTARTSYS */
5503 static int brightness_set(int value)
5504 {
5505         int cmos_cmd, inc, i, res;
5506         int current_value;
5507         int command_bits;
5508
5509         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
5510             value < 0)
5511                 return -EINVAL;
5512
5513         res = mutex_lock_killable(&brightness_mutex);
5514         if (res < 0)
5515                 return res;
5516
5517         res = brightness_get_raw(&current_value);
5518         if (res < 0)
5519                 goto errout;
5520
5521         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
5522         current_value &= TP_EC_BACKLIGHT_LVLMSK;
5523
5524         cmos_cmd = value > current_value ?
5525                         TP_CMOS_BRIGHTNESS_UP :
5526                         TP_CMOS_BRIGHTNESS_DOWN;
5527         inc = (value > current_value)? 1 : -1;
5528
5529         res = 0;
5530         for (i = current_value; i != value; i += inc) {
5531                 if ((brightness_mode & 2) &&
5532                     issue_thinkpad_cmos_command(cmos_cmd)) {
5533                         res = -EIO;
5534                         goto errout;
5535                 }
5536                 if ((brightness_mode & 1) &&
5537                     !acpi_ec_write(TP_EC_BACKLIGHT,
5538                                    (i + inc) | command_bits)) {
5539                         res = -EIO;
5540                         goto errout;;
5541                 }
5542         }
5543
5544 errout:
5545         mutex_unlock(&brightness_mutex);
5546         return res;
5547 }
5548
5549 /* sysfs backlight class ----------------------------------------------- */
5550
5551 static int brightness_update_status(struct backlight_device *bd)
5552 {
5553         /* it is the backlight class's job (caller) to handle
5554          * EINTR and other errors properly */
5555         return brightness_set(
5556                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
5557                  bd->props.power == FB_BLANK_UNBLANK) ?
5558                                 bd->props.brightness : 0);
5559 }
5560
5561 static int brightness_get(struct backlight_device *bd)
5562 {
5563         int status, res;
5564
5565         res = brightness_get_raw(&status);
5566         if (res < 0)
5567                 return 0; /* FIXME: teach backlight about error handling */
5568
5569         return status & TP_EC_BACKLIGHT_LVLMSK;
5570 }
5571
5572 static struct backlight_ops ibm_backlight_data = {
5573         .get_brightness = brightness_get,
5574         .update_status  = brightness_update_status,
5575 };
5576
5577 /* --------------------------------------------------------------------- */
5578
5579 static int __init brightness_init(struct ibm_init_struct *iibm)
5580 {
5581         int b;
5582
5583         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
5584
5585         mutex_init(&brightness_mutex);
5586
5587         /*
5588          * We always attempt to detect acpi support, so as to switch
5589          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
5590          * going to publish a backlight interface
5591          */
5592         b = tpacpi_check_std_acpi_brightness_support();
5593         if (b > 0) {
5594
5595                 if (acpi_video_backlight_support()) {
5596                         if (brightness_enable > 1) {
5597                                 printk(TPACPI_NOTICE
5598                                        "Standard ACPI backlight interface "
5599                                        "available, not loading native one.\n");
5600                                 return 1;
5601                         } else if (brightness_enable == 1) {
5602                                 printk(TPACPI_NOTICE
5603                                        "Backlight control force enabled, even if standard "
5604                                        "ACPI backlight interface is available\n");
5605                         }
5606                 } else {
5607                         if (brightness_enable > 1) {
5608                                 printk(TPACPI_NOTICE
5609                                        "Standard ACPI backlight interface not "
5610                                        "available, thinkpad_acpi native "
5611                                        "brightness control enabled\n");
5612                         }
5613                 }
5614         }
5615
5616         if (!brightness_enable) {
5617                 dbg_printk(TPACPI_DBG_INIT,
5618                            "brightness support disabled by "
5619                            "module parameter\n");
5620                 return 1;
5621         }
5622
5623         if (b > 16) {
5624                 printk(TPACPI_ERR
5625                        "Unsupported brightness interface, "
5626                        "please contact %s\n", TPACPI_MAIL);
5627                 return 1;
5628         }
5629         if (b == 16)
5630                 tp_features.bright_16levels = 1;
5631
5632         if (!brightness_mode) {
5633                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
5634                         brightness_mode = 2;
5635                 else
5636                         brightness_mode = 3;
5637
5638                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
5639                         brightness_mode);
5640         }
5641
5642         if (brightness_mode > 3)
5643                 return -EINVAL;
5644
5645         if (brightness_get_raw(&b) < 0)
5646                 return 1;
5647
5648         if (tp_features.bright_16levels)
5649                 printk(TPACPI_INFO
5650                        "detected a 16-level brightness capable ThinkPad\n");
5651
5652         ibm_backlight_device = backlight_device_register(
5653                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
5654                                         &ibm_backlight_data);
5655         if (IS_ERR(ibm_backlight_device)) {
5656                 printk(TPACPI_ERR "Could not register backlight device\n");
5657                 return PTR_ERR(ibm_backlight_device);
5658         }
5659         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
5660
5661         ibm_backlight_device->props.max_brightness =
5662                                 (tp_features.bright_16levels)? 15 : 7;
5663         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
5664         backlight_update_status(ibm_backlight_device);
5665
5666         return 0;
5667 }
5668
5669 static void brightness_exit(void)
5670 {
5671         if (ibm_backlight_device) {
5672                 vdbg_printk(TPACPI_DBG_EXIT,
5673                             "calling backlight_device_unregister()\n");
5674                 backlight_device_unregister(ibm_backlight_device);
5675         }
5676 }
5677
5678 static int brightness_read(char *p)
5679 {
5680         int len = 0;
5681         int level;
5682
5683         level = brightness_get(NULL);
5684         if (level < 0) {
5685                 len += sprintf(p + len, "level:\t\tunreadable\n");
5686         } else {
5687                 len += sprintf(p + len, "level:\t\t%d\n", level);
5688                 len += sprintf(p + len, "commands:\tup, down\n");
5689                 len += sprintf(p + len, "commands:\tlevel <level>"
5690                                " (<level> is 0-%d)\n",
5691                                (tp_features.bright_16levels) ? 15 : 7);
5692         }
5693
5694         return len;
5695 }
5696
5697 static int brightness_write(char *buf)
5698 {
5699         int level;
5700         int rc;
5701         char *cmd;
5702         int max_level = (tp_features.bright_16levels) ? 15 : 7;
5703
5704         level = brightness_get(NULL);
5705         if (level < 0)
5706                 return level;
5707
5708         while ((cmd = next_cmd(&buf))) {
5709                 if (strlencmp(cmd, "up") == 0) {
5710                         if (level < max_level)
5711                                 level++;
5712                 } else if (strlencmp(cmd, "down") == 0) {
5713                         if (level > 0)
5714                                 level--;
5715                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
5716                            level >= 0 && level <= max_level) {
5717                         /* new level set */
5718                 } else
5719                         return -EINVAL;
5720         }
5721
5722         /*
5723          * Now we know what the final level should be, so we try to set it.
5724          * Doing it this way makes the syscall restartable in case of EINTR
5725          */
5726         rc = brightness_set(level);
5727         return (rc == -EINTR)? ERESTARTSYS : rc;
5728 }
5729
5730 static struct ibm_struct brightness_driver_data = {
5731         .name = "brightness",
5732         .read = brightness_read,
5733         .write = brightness_write,
5734         .exit = brightness_exit,
5735 };
5736
5737 /*************************************************************************
5738  * Volume subdriver
5739  */
5740
5741 static int volume_offset = 0x30;
5742
5743 static int volume_read(char *p)
5744 {
5745         int len = 0;
5746         u8 level;
5747
5748         if (!acpi_ec_read(volume_offset, &level)) {
5749                 len += sprintf(p + len, "level:\t\tunreadable\n");
5750         } else {
5751                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
5752                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
5753                 len += sprintf(p + len, "commands:\tup, down, mute\n");
5754                 len += sprintf(p + len, "commands:\tlevel <level>"
5755                                " (<level> is 0-15)\n");
5756         }
5757
5758         return len;
5759 }
5760
5761 static int volume_write(char *buf)
5762 {
5763         int cmos_cmd, inc, i;
5764         u8 level, mute;
5765         int new_level, new_mute;
5766         char *cmd;
5767
5768         while ((cmd = next_cmd(&buf))) {
5769                 if (!acpi_ec_read(volume_offset, &level))
5770                         return -EIO;
5771                 new_mute = mute = level & 0x40;
5772                 new_level = level = level & 0xf;
5773
5774                 if (strlencmp(cmd, "up") == 0) {
5775                         if (mute)
5776                                 new_mute = 0;
5777                         else
5778                                 new_level = level == 15 ? 15 : level + 1;
5779                 } else if (strlencmp(cmd, "down") == 0) {
5780                         if (mute)
5781                                 new_mute = 0;
5782                         else
5783                                 new_level = level == 0 ? 0 : level - 1;
5784                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
5785                            new_level >= 0 && new_level <= 15) {
5786                         /* new_level set */
5787                 } else if (strlencmp(cmd, "mute") == 0) {
5788                         new_mute = 0x40;
5789                 } else
5790                         return -EINVAL;
5791
5792                 if (new_level != level) {
5793                         /* mute doesn't change */
5794
5795                         cmos_cmd = (new_level > level) ?
5796                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
5797                         inc = new_level > level ? 1 : -1;
5798
5799                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
5800                                      !acpi_ec_write(volume_offset, level)))
5801                                 return -EIO;
5802
5803                         for (i = level; i != new_level; i += inc)
5804                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
5805                                     !acpi_ec_write(volume_offset, i + inc))
5806                                         return -EIO;
5807
5808                         if (mute &&
5809                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
5810                              !acpi_ec_write(volume_offset, new_level + mute))) {
5811                                 return -EIO;
5812                         }
5813                 }
5814
5815                 if (new_mute != mute) {
5816                         /* level doesn't change */
5817
5818                         cmos_cmd = (new_mute) ?
5819                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
5820
5821                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
5822                             !acpi_ec_write(volume_offset, level + new_mute))
5823                                 return -EIO;
5824                 }
5825         }
5826
5827         return 0;
5828 }
5829
5830 static struct ibm_struct volume_driver_data = {
5831         .name = "volume",
5832         .read = volume_read,
5833         .write = volume_write,
5834 };
5835
5836 /*************************************************************************
5837  * Fan subdriver
5838  */
5839
5840 /*
5841  * FAN ACCESS MODES
5842  *
5843  * TPACPI_FAN_RD_ACPI_GFAN:
5844  *      ACPI GFAN method: returns fan level
5845  *
5846  *      see TPACPI_FAN_WR_ACPI_SFAN
5847  *      EC 0x2f (HFSP) not available if GFAN exists
5848  *
5849  * TPACPI_FAN_WR_ACPI_SFAN:
5850  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5851  *
5852  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5853  *      it for writing.
5854  *
5855  * TPACPI_FAN_WR_TPEC:
5856  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5857  *      Supported on almost all ThinkPads
5858  *
5859  *      Fan speed changes of any sort (including those caused by the
5860  *      disengaged mode) are usually done slowly by the firmware as the
5861  *      maximum ammount of fan duty cycle change per second seems to be
5862  *      limited.
5863  *
5864  *      Reading is not available if GFAN exists.
5865  *      Writing is not available if SFAN exists.
5866  *
5867  *      Bits
5868  *       7      automatic mode engaged;
5869  *              (default operation mode of the ThinkPad)
5870  *              fan level is ignored in this mode.
5871  *       6      full speed mode (takes precedence over bit 7);
5872  *              not available on all thinkpads.  May disable
5873  *              the tachometer while the fan controller ramps up
5874  *              the speed (which can take up to a few *minutes*).
5875  *              Speeds up fan to 100% duty-cycle, which is far above
5876  *              the standard RPM levels.  It is not impossible that
5877  *              it could cause hardware damage.
5878  *      5-3     unused in some models.  Extra bits for fan level
5879  *              in others, but still useless as all values above
5880  *              7 map to the same speed as level 7 in these models.
5881  *      2-0     fan level (0..7 usually)
5882  *                      0x00 = stop
5883  *                      0x07 = max (set when temperatures critical)
5884  *              Some ThinkPads may have other levels, see
5885  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5886  *
5887  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5888  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5889  *      does so, its initial value is meaningless (0x07).
5890  *
5891  *      For firmware bugs, refer to:
5892  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5893  *
5894  *      ----
5895  *
5896  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5897  *      Main fan tachometer reading (in RPM)
5898  *
5899  *      This register is present on all ThinkPads with a new-style EC, and
5900  *      it is known not to be present on the A21m/e, and T22, as there is
5901  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5902  *      ThinkPads from this same time period (and earlier) probably lack the
5903  *      tachometer as well.
5904  *
5905  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5906  *      was never fixed by IBM to report the EC firmware version string
5907  *      probably support the tachometer (like the early X models), so
5908  *      detecting it is quite hard.  We need more data to know for sure.
5909  *
5910  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5911  *      might result.
5912  *
5913  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5914  *      mode.
5915  *
5916  *      For firmware bugs, refer to:
5917  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5918  *
5919  * TPACPI_FAN_WR_ACPI_FANS:
5920  *      ThinkPad X31, X40, X41.  Not available in the X60.
5921  *
5922  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5923  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5924  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5925  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5926  *
5927  *      The speeds are stored on handles
5928  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5929  *
5930  *      There are three default speed sets, acessible as handles:
5931  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5932  *
5933  *      ACPI DSDT switches which set is in use depending on various
5934  *      factors.
5935  *
5936  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5937  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5938  *      but the ACPI tables just mention level 7.
5939  */
5940
5941 enum {                                  /* Fan control constants */
5942         fan_status_offset = 0x2f,       /* EC register 0x2f */
5943         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5944                                          * 0x84 must be read before 0x85 */
5945
5946         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5947         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5948
5949         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5950 };
5951
5952 enum fan_status_access_mode {
5953         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5954         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5955         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5956 };
5957
5958 enum fan_control_access_mode {
5959         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5960         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5961         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5962         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5963 };
5964
5965 enum fan_control_commands {
5966         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5967         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5968         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5969                                                  * and also watchdog cmd */
5970 };
5971
5972 static int fan_control_allowed;
5973
5974 static enum fan_status_access_mode fan_status_access_mode;
5975 static enum fan_control_access_mode fan_control_access_mode;
5976 static enum fan_control_commands fan_control_commands;
5977
5978 static u8 fan_control_initial_status;
5979 static u8 fan_control_desired_level;
5980 static u8 fan_control_resume_level;
5981 static int fan_watchdog_maxinterval;
5982
5983 static struct mutex fan_mutex;
5984
5985 static void fan_watchdog_fire(struct work_struct *ignored);
5986 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5987
5988 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5989 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5990            "\\FSPD",            /* 600e/x, 770e, 770x */
5991            );                   /* all others */
5992 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5993            "JFNS",              /* 770x-JL */
5994            );                   /* all others */
5995
5996 /*
5997  * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the
5998  * HFSP register at boot, so it contains 0x07 but the Thinkpad could
5999  * be in auto mode (0x80).
6000  *
6001  * This is corrected by any write to HFSP either by the driver, or
6002  * by the firmware.
6003  *
6004  * We assume 0x07 really means auto mode while this quirk is active,
6005  * as this is far more likely than the ThinkPad being in level 7,
6006  * which is only used by the firmware during thermal emergencies.
6007  */
6008
6009 static void fan_quirk1_detect(void)
6010 {
6011         /* In some ThinkPads, neither the EC nor the ACPI
6012          * DSDT initialize the HFSP register, and it ends up
6013          * being initially set to 0x07 when it *could* be
6014          * either 0x07 or 0x80.
6015          *
6016          * Enable for TP-1Y (T43), TP-78 (R51e),
6017          * TP-76 (R52), TP-70 (T43, R52), which are known
6018          * to be buggy. */
6019         if (fan_control_initial_status == 0x07) {
6020                 switch (thinkpad_id.ec_model) {
6021                 case 0x5931: /* TP-1Y */
6022                 case 0x3837: /* TP-78 */
6023                 case 0x3637: /* TP-76 */
6024                 case 0x3037: /* TP-70 */
6025                         printk(TPACPI_NOTICE
6026                                "fan_init: initial fan status is unknown, "
6027                                "assuming it is in auto mode\n");
6028                         tp_features.fan_ctrl_status_undef = 1;
6029                         ;;
6030                 }
6031         }
6032 }
6033
6034 static void fan_quirk1_handle(u8 *fan_status)
6035 {
6036         if (unlikely(tp_features.fan_ctrl_status_undef)) {
6037                 if (*fan_status != fan_control_initial_status) {
6038                         /* something changed the HFSP regisnter since
6039                          * driver init time, so it is not undefined
6040                          * anymore */
6041                         tp_features.fan_ctrl_status_undef = 0;
6042                 } else {
6043                         /* Return most likely status. In fact, it
6044                          * might be the only possible status */
6045                         *fan_status = TP_EC_FAN_AUTO;
6046                 }
6047         }
6048 }
6049
6050 /*
6051  * Call with fan_mutex held
6052  */
6053 static void fan_update_desired_level(u8 status)
6054 {
6055         if ((status &
6056              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6057                 if (status > 7)
6058                         fan_control_desired_level = 7;
6059                 else
6060                         fan_control_desired_level = status;
6061         }
6062 }
6063
6064 static int fan_get_status(u8 *status)
6065 {
6066         u8 s;
6067
6068         /* TODO:
6069          * Add TPACPI_FAN_RD_ACPI_FANS ? */
6070
6071         switch (fan_status_access_mode) {
6072         case TPACPI_FAN_RD_ACPI_GFAN:
6073                 /* 570, 600e/x, 770e, 770x */
6074
6075                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
6076                         return -EIO;
6077
6078                 if (likely(status))
6079                         *status = s & 0x07;
6080
6081                 break;
6082
6083         case TPACPI_FAN_RD_TPEC:
6084                 /* all except 570, 600e/x, 770e, 770x */
6085                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
6086                         return -EIO;
6087
6088                 if (likely(status)) {
6089                         *status = s;
6090                         fan_quirk1_handle(status);
6091                 }
6092
6093                 break;
6094
6095         default:
6096                 return -ENXIO;
6097         }
6098
6099         return 0;
6100 }
6101
6102 static int fan_get_status_safe(u8 *status)
6103 {
6104         int rc;
6105         u8 s;
6106
6107         if (mutex_lock_killable(&fan_mutex))
6108                 return -ERESTARTSYS;
6109         rc = fan_get_status(&s);
6110         if (!rc)
6111                 fan_update_desired_level(s);
6112         mutex_unlock(&fan_mutex);
6113
6114         if (status)
6115                 *status = s;
6116
6117         return rc;
6118 }
6119
6120 static int fan_get_speed(unsigned int *speed)
6121 {
6122         u8 hi, lo;
6123
6124         switch (fan_status_access_mode) {
6125         case TPACPI_FAN_RD_TPEC:
6126                 /* all except 570, 600e/x, 770e, 770x */
6127                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
6128                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
6129                         return -EIO;
6130
6131                 if (likely(speed))
6132                         *speed = (hi << 8) | lo;
6133
6134                 break;
6135
6136         default:
6137                 return -ENXIO;
6138         }
6139
6140         return 0;
6141 }
6142
6143 static int fan_set_level(int level)
6144 {
6145         if (!fan_control_allowed)
6146                 return -EPERM;
6147
6148         switch (fan_control_access_mode) {
6149         case TPACPI_FAN_WR_ACPI_SFAN:
6150                 if (level >= 0 && level <= 7) {
6151                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
6152                                 return -EIO;
6153                 } else
6154                         return -EINVAL;
6155                 break;
6156
6157         case TPACPI_FAN_WR_ACPI_FANS:
6158         case TPACPI_FAN_WR_TPEC:
6159                 if (!(level & TP_EC_FAN_AUTO) &&
6160                     !(level & TP_EC_FAN_FULLSPEED) &&
6161                     ((level < 0) || (level > 7)))
6162                         return -EINVAL;
6163
6164                 /* safety net should the EC not support AUTO
6165                  * or FULLSPEED mode bits and just ignore them */
6166                 if (level & TP_EC_FAN_FULLSPEED)
6167                         level |= 7;     /* safety min speed 7 */
6168                 else if (level & TP_EC_FAN_AUTO)
6169                         level |= 4;     /* safety min speed 4 */
6170
6171                 if (!acpi_ec_write(fan_status_offset, level))
6172                         return -EIO;
6173                 else
6174                         tp_features.fan_ctrl_status_undef = 0;
6175                 break;
6176
6177         default:
6178                 return -ENXIO;
6179         }
6180         return 0;
6181 }
6182
6183 static int fan_set_level_safe(int level)
6184 {
6185         int rc;
6186
6187         if (!fan_control_allowed)
6188                 return -EPERM;
6189
6190         if (mutex_lock_killable(&fan_mutex))
6191                 return -ERESTARTSYS;
6192
6193         if (level == TPACPI_FAN_LAST_LEVEL)
6194                 level = fan_control_desired_level;
6195
6196         rc = fan_set_level(level);
6197         if (!rc)
6198                 fan_update_desired_level(level);
6199
6200         mutex_unlock(&fan_mutex);
6201         return rc;
6202 }
6203
6204 static int fan_set_enable(void)
6205 {
6206         u8 s;
6207         int rc;
6208
6209         if (!fan_control_allowed)
6210                 return -EPERM;
6211
6212         if (mutex_lock_killable(&fan_mutex))
6213                 return -ERESTARTSYS;
6214
6215         switch (fan_control_access_mode) {
6216         case TPACPI_FAN_WR_ACPI_FANS:
6217         case TPACPI_FAN_WR_TPEC:
6218                 rc = fan_get_status(&s);
6219                 if (rc < 0)
6220                         break;
6221
6222                 /* Don't go out of emergency fan mode */
6223                 if (s != 7) {
6224                         s &= 0x07;
6225                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
6226                 }
6227
6228                 if (!acpi_ec_write(fan_status_offset, s))
6229                         rc = -EIO;
6230                 else {
6231                         tp_features.fan_ctrl_status_undef = 0;
6232                         rc = 0;
6233                 }
6234                 break;
6235
6236         case TPACPI_FAN_WR_ACPI_SFAN:
6237                 rc = fan_get_status(&s);
6238                 if (rc < 0)
6239                         break;
6240
6241                 s &= 0x07;
6242
6243                 /* Set fan to at least level 4 */
6244                 s |= 4;
6245
6246                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
6247                         rc = -EIO;
6248                 else
6249                         rc = 0;
6250                 break;
6251
6252         default:
6253                 rc = -ENXIO;
6254         }
6255
6256         mutex_unlock(&fan_mutex);
6257         return rc;
6258 }
6259
6260 static int fan_set_disable(void)
6261 {
6262         int rc;
6263
6264         if (!fan_control_allowed)
6265                 return -EPERM;
6266
6267         if (mutex_lock_killable(&fan_mutex))
6268                 return -ERESTARTSYS;
6269
6270         rc = 0;
6271         switch (fan_control_access_mode) {
6272         case TPACPI_FAN_WR_ACPI_FANS:
6273         case TPACPI_FAN_WR_TPEC:
6274                 if (!acpi_ec_write(fan_status_offset, 0x00))
6275                         rc = -EIO;
6276                 else {
6277                         fan_control_desired_level = 0;
6278                         tp_features.fan_ctrl_status_undef = 0;
6279                 }
6280                 break;
6281
6282         case TPACPI_FAN_WR_ACPI_SFAN:
6283                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
6284                         rc = -EIO;
6285                 else
6286                         fan_control_desired_level = 0;
6287                 break;
6288
6289         default:
6290                 rc = -ENXIO;
6291         }
6292
6293
6294         mutex_unlock(&fan_mutex);
6295         return rc;
6296 }
6297
6298 static int fan_set_speed(int speed)
6299 {
6300         int rc;
6301
6302         if (!fan_control_allowed)
6303                 return -EPERM;
6304
6305         if (mutex_lock_killable(&fan_mutex))
6306                 return -ERESTARTSYS;
6307
6308         rc = 0;
6309         switch (fan_control_access_mode) {
6310         case TPACPI_FAN_WR_ACPI_FANS:
6311                 if (speed >= 0 && speed <= 65535) {
6312                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
6313                                         speed, speed, speed))
6314                                 rc = -EIO;
6315                 } else
6316                         rc = -EINVAL;
6317                 break;
6318
6319         default:
6320                 rc = -ENXIO;
6321         }
6322
6323         mutex_unlock(&fan_mutex);
6324         return rc;
6325 }
6326
6327 static void fan_watchdog_reset(void)
6328 {
6329         static int fan_watchdog_active;
6330
6331         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
6332                 return;
6333
6334         if (fan_watchdog_active)
6335                 cancel_delayed_work(&fan_watchdog_task);
6336
6337         if (fan_watchdog_maxinterval > 0 &&
6338             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
6339                 fan_watchdog_active = 1;
6340                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
6341                                 msecs_to_jiffies(fan_watchdog_maxinterval
6342                                                  * 1000))) {
6343                         printk(TPACPI_ERR
6344                                "failed to queue the fan watchdog, "
6345                                "watchdog will not trigger\n");
6346                 }
6347         } else
6348                 fan_watchdog_active = 0;
6349 }
6350
6351 static void fan_watchdog_fire(struct work_struct *ignored)
6352 {
6353         int rc;
6354
6355         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
6356                 return;
6357
6358         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
6359         rc = fan_set_enable();
6360         if (rc < 0) {
6361                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
6362                         "will try again later...\n", -rc);
6363                 /* reschedule for later */
6364                 fan_watchdog_reset();
6365         }
6366 }
6367
6368 /*
6369  * SYSFS fan layout: hwmon compatible (device)
6370  *
6371  * pwm*_enable:
6372  *      0: "disengaged" mode
6373  *      1: manual mode
6374  *      2: native EC "auto" mode (recommended, hardware default)
6375  *
6376  * pwm*: set speed in manual mode, ignored otherwise.
6377  *      0 is level 0; 255 is level 7. Intermediate points done with linear
6378  *      interpolation.
6379  *
6380  * fan*_input: tachometer reading, RPM
6381  *
6382  *
6383  * SYSFS fan layout: extensions
6384  *
6385  * fan_watchdog (driver):
6386  *      fan watchdog interval in seconds, 0 disables (default), max 120
6387  */
6388
6389 /* sysfs fan pwm1_enable ----------------------------------------------- */
6390 static ssize_t fan_pwm1_enable_show(struct device *dev,
6391                                     struct device_attribute *attr,
6392                                     char *buf)
6393 {
6394         int res, mode;
6395         u8 status;
6396
6397         res = fan_get_status_safe(&status);
6398         if (res)
6399                 return res;
6400
6401         if (status & TP_EC_FAN_FULLSPEED) {
6402                 mode = 0;
6403         } else if (status & TP_EC_FAN_AUTO) {
6404                 mode = 2;
6405         } else
6406                 mode = 1;
6407
6408         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
6409 }
6410
6411 static ssize_t fan_pwm1_enable_store(struct device *dev,
6412                                      struct device_attribute *attr,
6413                                      const char *buf, size_t count)
6414 {
6415         unsigned long t;
6416         int res, level;
6417
6418         if (parse_strtoul(buf, 2, &t))
6419                 return -EINVAL;
6420
6421         switch (t) {
6422         case 0:
6423                 level = TP_EC_FAN_FULLSPEED;
6424                 break;
6425         case 1:
6426                 level = TPACPI_FAN_LAST_LEVEL;
6427                 break;
6428         case 2:
6429                 level = TP_EC_FAN_AUTO;
6430                 break;
6431         case 3:
6432                 /* reserved for software-controlled auto mode */
6433                 return -ENOSYS;
6434         default:
6435                 return -EINVAL;
6436         }
6437
6438         res = fan_set_level_safe(level);
6439         if (res == -ENXIO)
6440                 return -EINVAL;
6441         else if (res < 0)
6442                 return res;
6443
6444         fan_watchdog_reset();
6445
6446         return count;
6447 }
6448
6449 static struct device_attribute dev_attr_fan_pwm1_enable =
6450         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
6451                 fan_pwm1_enable_show, fan_pwm1_enable_store);
6452
6453 /* sysfs fan pwm1 ------------------------------------------------------ */
6454 static ssize_t fan_pwm1_show(struct device *dev,
6455                              struct device_attribute *attr,
6456                              char *buf)
6457 {
6458         int res;
6459         u8 status;
6460
6461         res = fan_get_status_safe(&status);
6462         if (res)
6463                 return res;
6464
6465         if ((status &
6466              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
6467                 status = fan_control_desired_level;
6468
6469         if (status > 7)
6470                 status = 7;
6471
6472         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
6473 }
6474
6475 static ssize_t fan_pwm1_store(struct device *dev,
6476                               struct device_attribute *attr,
6477                               const char *buf, size_t count)
6478 {
6479         unsigned long s;
6480         int rc;
6481         u8 status, newlevel;
6482
6483         if (parse_strtoul(buf, 255, &s))
6484                 return -EINVAL;
6485
6486         /* scale down from 0-255 to 0-7 */
6487         newlevel = (s >> 5) & 0x07;
6488
6489         if (mutex_lock_killable(&fan_mutex))
6490                 return -ERESTARTSYS;
6491
6492         rc = fan_get_status(&status);
6493         if (!rc && (status &
6494                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
6495                 rc = fan_set_level(newlevel);
6496                 if (rc == -ENXIO)
6497                         rc = -EINVAL;
6498                 else if (!rc) {
6499                         fan_update_desired_level(newlevel);
6500                         fan_watchdog_reset();
6501                 }
6502         }
6503
6504         mutex_unlock(&fan_mutex);
6505         return (rc)? rc : count;
6506 }
6507
6508 static struct device_attribute dev_attr_fan_pwm1 =
6509         __ATTR(pwm1, S_IWUSR | S_IRUGO,
6510                 fan_pwm1_show, fan_pwm1_store);
6511
6512 /* sysfs fan fan1_input ------------------------------------------------ */
6513 static ssize_t fan_fan1_input_show(struct device *dev,
6514                            struct device_attribute *attr,
6515                            char *buf)
6516 {
6517         int res;
6518         unsigned int speed;
6519
6520         res = fan_get_speed(&speed);
6521         if (res < 0)
6522                 return res;
6523
6524         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
6525 }
6526
6527 static struct device_attribute dev_attr_fan_fan1_input =
6528         __ATTR(fan1_input, S_IRUGO,
6529                 fan_fan1_input_show, NULL);
6530
6531 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
6532 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
6533                                      char *buf)
6534 {
6535         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
6536 }
6537
6538 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
6539                                       const char *buf, size_t count)
6540 {
6541         unsigned long t;
6542
6543         if (parse_strtoul(buf, 120, &t))
6544                 return -EINVAL;
6545
6546         if (!fan_control_allowed)
6547                 return -EPERM;
6548
6549         fan_watchdog_maxinterval = t;
6550         fan_watchdog_reset();
6551
6552         return count;
6553 }
6554
6555 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
6556                 fan_fan_watchdog_show, fan_fan_watchdog_store);
6557
6558 /* --------------------------------------------------------------------- */
6559 static struct attribute *fan_attributes[] = {
6560         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
6561         &dev_attr_fan_fan1_input.attr,
6562         NULL
6563 };
6564
6565 static const struct attribute_group fan_attr_group = {
6566         .attrs = fan_attributes,
6567 };
6568
6569 static int __init fan_init(struct ibm_init_struct *iibm)
6570 {
6571         int rc;
6572
6573         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
6574
6575         mutex_init(&fan_mutex);
6576         fan_status_access_mode = TPACPI_FAN_NONE;
6577         fan_control_access_mode = TPACPI_FAN_WR_NONE;
6578         fan_control_commands = 0;
6579         fan_watchdog_maxinterval = 0;
6580         tp_features.fan_ctrl_status_undef = 0;
6581         fan_control_desired_level = 7;
6582
6583         TPACPI_ACPIHANDLE_INIT(fans);
6584         TPACPI_ACPIHANDLE_INIT(gfan);
6585         TPACPI_ACPIHANDLE_INIT(sfan);
6586
6587         if (gfan_handle) {
6588                 /* 570, 600e/x, 770e, 770x */
6589                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
6590         } else {
6591                 /* all other ThinkPads: note that even old-style
6592                  * ThinkPad ECs supports the fan control register */
6593                 if (likely(acpi_ec_read(fan_status_offset,
6594                                         &fan_control_initial_status))) {
6595                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
6596                         fan_quirk1_detect();
6597                 } else {
6598                         printk(TPACPI_ERR
6599                                "ThinkPad ACPI EC access misbehaving, "
6600                                "fan status and control unavailable\n");
6601                         return 1;
6602                 }
6603         }
6604
6605         if (sfan_handle) {
6606                 /* 570, 770x-JL */
6607                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
6608                 fan_control_commands |=
6609                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
6610         } else {
6611                 if (!gfan_handle) {
6612                         /* gfan without sfan means no fan control */
6613                         /* all other models implement TP EC 0x2f control */
6614
6615                         if (fans_handle) {
6616                                 /* X31, X40, X41 */
6617                                 fan_control_access_mode =
6618                                     TPACPI_FAN_WR_ACPI_FANS;
6619                                 fan_control_commands |=
6620                                     TPACPI_FAN_CMD_SPEED |
6621                                     TPACPI_FAN_CMD_LEVEL |
6622                                     TPACPI_FAN_CMD_ENABLE;
6623                         } else {
6624                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
6625                                 fan_control_commands |=
6626                                     TPACPI_FAN_CMD_LEVEL |
6627                                     TPACPI_FAN_CMD_ENABLE;
6628                         }
6629                 }
6630         }
6631
6632         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
6633                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
6634                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
6635                 fan_status_access_mode, fan_control_access_mode);
6636
6637         /* fan control master switch */
6638         if (!fan_control_allowed) {
6639                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
6640                 fan_control_commands = 0;
6641                 dbg_printk(TPACPI_DBG_INIT,
6642                            "fan control features disabled by parameter\n");
6643         }
6644
6645         /* update fan_control_desired_level */
6646         if (fan_status_access_mode != TPACPI_FAN_NONE)
6647                 fan_get_status_safe(NULL);
6648
6649         if (fan_status_access_mode != TPACPI_FAN_NONE ||
6650             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
6651                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
6652                                          &fan_attr_group);
6653                 if (rc < 0)
6654                         return rc;
6655
6656                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
6657                                         &driver_attr_fan_watchdog);
6658                 if (rc < 0) {
6659                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
6660                                         &fan_attr_group);
6661                         return rc;
6662                 }
6663                 return 0;
6664         } else
6665                 return 1;
6666 }
6667
6668 static void fan_exit(void)
6669 {
6670         vdbg_printk(TPACPI_DBG_EXIT,
6671                     "cancelling any pending fan watchdog tasks\n");
6672
6673         /* FIXME: can we really do this unconditionally? */
6674         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
6675         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
6676                            &driver_attr_fan_watchdog);
6677
6678         cancel_delayed_work(&fan_watchdog_task);
6679         flush_workqueue(tpacpi_wq);
6680 }
6681
6682 static void fan_suspend(pm_message_t state)
6683 {
6684         int rc;
6685
6686         if (!fan_control_allowed)
6687                 return;
6688
6689         /* Store fan status in cache */
6690         fan_control_resume_level = 0;
6691         rc = fan_get_status_safe(&fan_control_resume_level);
6692         if (rc < 0)
6693                 printk(TPACPI_NOTICE
6694                         "failed to read fan level for later "
6695                         "restore during resume: %d\n", rc);
6696
6697         /* if it is undefined, don't attempt to restore it.
6698          * KEEP THIS LAST */
6699         if (tp_features.fan_ctrl_status_undef)
6700                 fan_control_resume_level = 0;
6701 }
6702
6703 static void fan_resume(void)
6704 {
6705         u8 current_level = 7;
6706         bool do_set = false;
6707         int rc;
6708
6709         /* DSDT *always* updates status on resume */
6710         tp_features.fan_ctrl_status_undef = 0;
6711
6712         if (!fan_control_allowed ||
6713             !fan_control_resume_level ||
6714             (fan_get_status_safe(&current_level) < 0))
6715                 return;
6716
6717         switch (fan_control_access_mode) {
6718         case TPACPI_FAN_WR_ACPI_SFAN:
6719                 /* never decrease fan level */
6720                 do_set = (fan_control_resume_level > current_level);
6721                 break;
6722         case TPACPI_FAN_WR_ACPI_FANS:
6723         case TPACPI_FAN_WR_TPEC:
6724                 /* never decrease fan level, scale is:
6725                  * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO
6726                  *
6727                  * We expect the firmware to set either 7 or AUTO, but we
6728                  * handle FULLSPEED out of paranoia.
6729                  *
6730                  * So, we can safely only restore FULLSPEED or 7, anything
6731                  * else could slow the fan.  Restoring AUTO is useless, at
6732                  * best that's exactly what the DSDT already set (it is the
6733                  * slower it uses).
6734                  *
6735                  * Always keep in mind that the DSDT *will* have set the
6736                  * fans to what the vendor supposes is the best level.  We
6737                  * muck with it only to speed the fan up.
6738                  */
6739                 if (fan_control_resume_level != 7 &&
6740                     !(fan_control_resume_level & TP_EC_FAN_FULLSPEED))
6741                         return;
6742                 else
6743                         do_set = !(current_level & TP_EC_FAN_FULLSPEED) &&
6744                                  (current_level != fan_control_resume_level);
6745                 break;
6746         default:
6747                 return;
6748         }
6749         if (do_set) {
6750                 printk(TPACPI_NOTICE
6751                         "restoring fan level to 0x%02x\n",
6752                         fan_control_resume_level);
6753                 rc = fan_set_level_safe(fan_control_resume_level);
6754                 if (rc < 0)
6755                         printk(TPACPI_NOTICE
6756                                 "failed to restore fan level: %d\n", rc);
6757         }
6758 }
6759
6760 static int fan_read(char *p)
6761 {
6762         int len = 0;
6763         int rc;
6764         u8 status;
6765         unsigned int speed = 0;
6766
6767         switch (fan_status_access_mode) {
6768         case TPACPI_FAN_RD_ACPI_GFAN:
6769                 /* 570, 600e/x, 770e, 770x */
6770                 rc = fan_get_status_safe(&status);
6771                 if (rc < 0)
6772                         return rc;
6773
6774                 len += sprintf(p + len, "status:\t\t%s\n"
6775                                "level:\t\t%d\n",
6776                                (status != 0) ? "enabled" : "disabled", status);
6777                 break;
6778
6779         case TPACPI_FAN_RD_TPEC:
6780                 /* all except 570, 600e/x, 770e, 770x */
6781                 rc = fan_get_status_safe(&status);
6782                 if (rc < 0)
6783                         return rc;
6784
6785                 len += sprintf(p + len, "status:\t\t%s\n",
6786                                (status != 0) ? "enabled" : "disabled");
6787
6788                 rc = fan_get_speed(&speed);
6789                 if (rc < 0)
6790                         return rc;
6791
6792                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
6793
6794                 if (status & TP_EC_FAN_FULLSPEED)
6795                         /* Disengaged mode takes precedence */
6796                         len += sprintf(p + len, "level:\t\tdisengaged\n");
6797                 else if (status & TP_EC_FAN_AUTO)
6798                         len += sprintf(p + len, "level:\t\tauto\n");
6799                 else
6800                         len += sprintf(p + len, "level:\t\t%d\n", status);
6801                 break;
6802
6803         case TPACPI_FAN_NONE:
6804         default:
6805                 len += sprintf(p + len, "status:\t\tnot supported\n");
6806         }
6807
6808         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
6809                 len += sprintf(p + len, "commands:\tlevel <level>");
6810
6811                 switch (fan_control_access_mode) {
6812                 case TPACPI_FAN_WR_ACPI_SFAN:
6813                         len += sprintf(p + len, " (<level> is 0-7)\n");
6814                         break;
6815
6816                 default:
6817                         len += sprintf(p + len, " (<level> is 0-7, "
6818                                        "auto, disengaged, full-speed)\n");
6819                         break;
6820                 }
6821         }
6822
6823         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
6824                 len += sprintf(p + len, "commands:\tenable, disable\n"
6825                                "commands:\twatchdog <timeout> (<timeout> "
6826                                "is 0 (off), 1-120 (seconds))\n");
6827
6828         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
6829                 len += sprintf(p + len, "commands:\tspeed <speed>"
6830                                " (<speed> is 0-65535)\n");
6831
6832         return len;
6833 }
6834
6835 static int fan_write_cmd_level(const char *cmd, int *rc)
6836 {
6837         int level;
6838
6839         if (strlencmp(cmd, "level auto") == 0)
6840                 level = TP_EC_FAN_AUTO;
6841         else if ((strlencmp(cmd, "level disengaged") == 0) |
6842                         (strlencmp(cmd, "level full-speed") == 0))
6843                 level = TP_EC_FAN_FULLSPEED;
6844         else if (sscanf(cmd, "level %d", &level) != 1)
6845                 return 0;
6846
6847         *rc = fan_set_level_safe(level);
6848         if (*rc == -ENXIO)
6849                 printk(TPACPI_ERR "level command accepted for unsupported "
6850                        "access mode %d", fan_control_access_mode);
6851
6852         return 1;
6853 }
6854
6855 static int fan_write_cmd_enable(const char *cmd, int *rc)
6856 {
6857         if (strlencmp(cmd, "enable") != 0)
6858                 return 0;
6859
6860         *rc = fan_set_enable();
6861         if (*rc == -ENXIO)
6862                 printk(TPACPI_ERR "enable command accepted for unsupported "
6863                        "access mode %d", fan_control_access_mode);
6864
6865         return 1;
6866 }
6867
6868 static int fan_write_cmd_disable(const char *cmd, int *rc)
6869 {
6870         if (strlencmp(cmd, "disable") != 0)
6871                 return 0;
6872
6873         *rc = fan_set_disable();
6874         if (*rc == -ENXIO)
6875                 printk(TPACPI_ERR "disable command accepted for unsupported "
6876                        "access mode %d", fan_control_access_mode);
6877
6878         return 1;
6879 }
6880
6881 static int fan_write_cmd_speed(const char *cmd, int *rc)
6882 {
6883         int speed;
6884
6885         /* TODO:
6886          * Support speed <low> <medium> <high> ? */
6887
6888         if (sscanf(cmd, "speed %d", &speed) != 1)
6889                 return 0;
6890
6891         *rc = fan_set_speed(speed);
6892         if (*rc == -ENXIO)
6893                 printk(TPACPI_ERR "speed command accepted for unsupported "
6894                        "access mode %d", fan_control_access_mode);
6895
6896         return 1;
6897 }
6898
6899 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
6900 {
6901         int interval;
6902
6903         if (sscanf(cmd, "watchdog %d", &interval) != 1)
6904                 return 0;
6905
6906         if (interval < 0 || interval > 120)
6907                 *rc = -EINVAL;
6908         else
6909                 fan_watchdog_maxinterval = interval;
6910
6911         return 1;
6912 }
6913
6914 static int fan_write(char *buf)
6915 {
6916         char *cmd;
6917         int rc = 0;
6918
6919         while (!rc && (cmd = next_cmd(&buf))) {
6920                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6921                       fan_write_cmd_level(cmd, &rc)) &&
6922                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6923                       (fan_write_cmd_enable(cmd, &rc) ||
6924                        fan_write_cmd_disable(cmd, &rc) ||
6925                        fan_write_cmd_watchdog(cmd, &rc))) &&
6926                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6927                       fan_write_cmd_speed(cmd, &rc))
6928                     )
6929                         rc = -EINVAL;
6930                 else if (!rc)
6931                         fan_watchdog_reset();
6932         }
6933
6934         return rc;
6935 }
6936
6937 static struct ibm_struct fan_driver_data = {
6938         .name = "fan",
6939         .read = fan_read,
6940         .write = fan_write,
6941         .exit = fan_exit,
6942         .suspend = fan_suspend,
6943         .resume = fan_resume,
6944 };
6945
6946 /****************************************************************************
6947  ****************************************************************************
6948  *
6949  * Infrastructure
6950  *
6951  ****************************************************************************
6952  ****************************************************************************/
6953
6954 /* sysfs name ---------------------------------------------------------- */
6955 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6956                            struct device_attribute *attr,
6957                            char *buf)
6958 {
6959         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6960 }
6961
6962 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6963         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6964
6965 /* --------------------------------------------------------------------- */
6966
6967 /* /proc support */
6968 static struct proc_dir_entry *proc_dir;
6969
6970 /*
6971  * Module and infrastructure proble, init and exit handling
6972  */
6973
6974 static int force_load;
6975
6976 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6977 static const char * __init str_supported(int is_supported)
6978 {
6979         static char text_unsupported[] __initdata = "not supported";
6980
6981         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6982 }
6983 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6984
6985 static void ibm_exit(struct ibm_struct *ibm)
6986 {
6987         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6988
6989         list_del_init(&ibm->all_drivers);
6990
6991         if (ibm->flags.acpi_notify_installed) {
6992                 dbg_printk(TPACPI_DBG_EXIT,
6993                         "%s: acpi_remove_notify_handler\n", ibm->name);
6994                 BUG_ON(!ibm->acpi);
6995                 acpi_remove_notify_handler(*ibm->acpi->handle,
6996                                            ibm->acpi->type,
6997                                            dispatch_acpi_notify);
6998                 ibm->flags.acpi_notify_installed = 0;
6999                 ibm->flags.acpi_notify_installed = 0;
7000         }
7001
7002         if (ibm->flags.proc_created) {
7003                 dbg_printk(TPACPI_DBG_EXIT,
7004                         "%s: remove_proc_entry\n", ibm->name);
7005                 remove_proc_entry(ibm->name, proc_dir);
7006                 ibm->flags.proc_created = 0;
7007         }
7008
7009         if (ibm->flags.acpi_driver_registered) {
7010                 dbg_printk(TPACPI_DBG_EXIT,
7011                         "%s: acpi_bus_unregister_driver\n", ibm->name);
7012                 BUG_ON(!ibm->acpi);
7013                 acpi_bus_unregister_driver(ibm->acpi->driver);
7014                 kfree(ibm->acpi->driver);
7015                 ibm->acpi->driver = NULL;
7016                 ibm->flags.acpi_driver_registered = 0;
7017         }
7018
7019         if (ibm->flags.init_called && ibm->exit) {
7020                 ibm->exit();
7021                 ibm->flags.init_called = 0;
7022         }
7023
7024         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
7025 }
7026
7027 static int __init ibm_init(struct ibm_init_struct *iibm)
7028 {
7029         int ret;
7030         struct ibm_struct *ibm = iibm->data;
7031         struct proc_dir_entry *entry;
7032
7033         BUG_ON(ibm == NULL);
7034
7035         INIT_LIST_HEAD(&ibm->all_drivers);
7036
7037         if (ibm->flags.experimental && !experimental)
7038                 return 0;
7039
7040         dbg_printk(TPACPI_DBG_INIT,
7041                 "probing for %s\n", ibm->name);
7042
7043         if (iibm->init) {
7044                 ret = iibm->init(iibm);
7045                 if (ret > 0)
7046                         return 0;       /* probe failed */
7047                 if (ret)
7048                         return ret;
7049
7050                 ibm->flags.init_called = 1;
7051         }
7052
7053         if (ibm->acpi) {
7054                 if (ibm->acpi->hid) {
7055                         ret = register_tpacpi_subdriver(ibm);
7056                         if (ret)
7057                                 goto err_out;
7058                 }
7059
7060                 if (ibm->acpi->notify) {
7061                         ret = setup_acpi_notify(ibm);
7062                         if (ret == -ENODEV) {
7063                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
7064                                         ibm->name);
7065                                 ret = 0;
7066                                 goto err_out;
7067                         }
7068                         if (ret < 0)
7069                                 goto err_out;
7070                 }
7071         }
7072
7073         dbg_printk(TPACPI_DBG_INIT,
7074                 "%s installed\n", ibm->name);
7075
7076         if (ibm->read) {
7077                 entry = create_proc_entry(ibm->name,
7078                                           S_IFREG | S_IRUGO | S_IWUSR,
7079                                           proc_dir);
7080                 if (!entry) {
7081                         printk(TPACPI_ERR "unable to create proc entry %s\n",
7082                                ibm->name);
7083                         ret = -ENODEV;
7084                         goto err_out;
7085                 }
7086                 entry->owner = THIS_MODULE;
7087                 entry->data = ibm;
7088                 entry->read_proc = &dispatch_procfs_read;
7089                 if (ibm->write)
7090                         entry->write_proc = &dispatch_procfs_write;
7091                 ibm->flags.proc_created = 1;
7092         }
7093
7094         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
7095
7096         return 0;
7097
7098 err_out:
7099         dbg_printk(TPACPI_DBG_INIT,
7100                 "%s: at error exit path with result %d\n",
7101                 ibm->name, ret);
7102
7103         ibm_exit(ibm);
7104         return (ret < 0)? ret : 0;
7105 }
7106
7107 /* Probing */
7108
7109 /* returns 0 - probe ok, or < 0 - probe error.
7110  * Probe ok doesn't mean thinkpad found.
7111  * On error, kfree() cleanup on tp->* is not performed, caller must do it */
7112 static int __must_check __init get_thinkpad_model_data(
7113                                                 struct thinkpad_id_data *tp)
7114 {
7115         const struct dmi_device *dev = NULL;
7116         char ec_fw_string[18];
7117         char const *s;
7118
7119         if (!tp)
7120                 return -EINVAL;
7121
7122         memset(tp, 0, sizeof(*tp));
7123
7124         if (dmi_name_in_vendors("IBM"))
7125                 tp->vendor = PCI_VENDOR_ID_IBM;
7126         else if (dmi_name_in_vendors("LENOVO"))
7127                 tp->vendor = PCI_VENDOR_ID_LENOVO;
7128         else
7129                 return 0;
7130
7131         s = dmi_get_system_info(DMI_BIOS_VERSION);
7132         tp->bios_version_str = kstrdup(s, GFP_KERNEL);
7133         if (s && !tp->bios_version_str)
7134                 return -ENOMEM;
7135         if (!tp->bios_version_str)
7136                 return 0;
7137         tp->bios_model = tp->bios_version_str[0]
7138                          | (tp->bios_version_str[1] << 8);
7139
7140         /*
7141          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
7142          * X32 or newer, all Z series;  Some models must have an
7143          * up-to-date BIOS or they will not be detected.
7144          *
7145          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7146          */
7147         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
7148                 if (sscanf(dev->name,
7149                            "IBM ThinkPad Embedded Controller -[%17c",
7150                            ec_fw_string) == 1) {
7151                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
7152                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
7153
7154                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
7155                         if (!tp->ec_version_str)
7156                                 return -ENOMEM;
7157                         tp->ec_model = ec_fw_string[0]
7158                                         | (ec_fw_string[1] << 8);
7159                         break;
7160                 }
7161         }
7162
7163         s = dmi_get_system_info(DMI_PRODUCT_VERSION);
7164         if (s && !strnicmp(s, "ThinkPad", 8)) {
7165                 tp->model_str = kstrdup(s, GFP_KERNEL);
7166                 if (!tp->model_str)
7167                         return -ENOMEM;
7168         }
7169
7170         s = dmi_get_system_info(DMI_PRODUCT_NAME);
7171         tp->nummodel_str = kstrdup(s, GFP_KERNEL);
7172         if (s && !tp->nummodel_str)
7173                 return -ENOMEM;
7174
7175         return 0;
7176 }
7177
7178 static int __init probe_for_thinkpad(void)
7179 {
7180         int is_thinkpad;
7181
7182         if (acpi_disabled)
7183                 return -ENODEV;
7184
7185         /*
7186          * Non-ancient models have better DMI tagging, but very old models
7187          * don't.
7188          */
7189         is_thinkpad = (thinkpad_id.model_str != NULL);
7190
7191         /* ec is required because many other handles are relative to it */
7192         TPACPI_ACPIHANDLE_INIT(ec);
7193         if (!ec_handle) {
7194                 if (is_thinkpad)
7195                         printk(TPACPI_ERR
7196                                 "Not yet supported ThinkPad detected!\n");
7197                 return -ENODEV;
7198         }
7199
7200         /*
7201          * Risks a regression on very old machines, but reduces potential
7202          * false positives a damn great deal
7203          */
7204         if (!is_thinkpad)
7205                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
7206
7207         if (!is_thinkpad && !force_load)
7208                 return -ENODEV;
7209
7210         return 0;
7211 }
7212
7213
7214 /* Module init, exit, parameters */
7215
7216 static struct ibm_init_struct ibms_init[] __initdata = {
7217         {
7218                 .init = thinkpad_acpi_driver_init,
7219                 .data = &thinkpad_acpi_driver_data,
7220         },
7221         {
7222                 .init = hotkey_init,
7223                 .data = &hotkey_driver_data,
7224         },
7225         {
7226                 .init = bluetooth_init,
7227                 .data = &bluetooth_driver_data,
7228         },
7229         {
7230                 .init = wan_init,
7231                 .data = &wan_driver_data,
7232         },
7233         {
7234                 .init = uwb_init,
7235                 .data = &uwb_driver_data,
7236         },
7237 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
7238         {
7239                 .init = video_init,
7240                 .data = &video_driver_data,
7241         },
7242 #endif
7243         {
7244                 .init = light_init,
7245                 .data = &light_driver_data,
7246         },
7247 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7248         {
7249                 .init = dock_init,
7250                 .data = &dock_driver_data[0],
7251         },
7252         {
7253                 .init = dock_init2,
7254                 .data = &dock_driver_data[1],
7255         },
7256 #endif
7257 #ifdef CONFIG_THINKPAD_ACPI_BAY
7258         {
7259                 .init = bay_init,
7260                 .data = &bay_driver_data,
7261         },
7262 #endif
7263         {
7264                 .init = cmos_init,
7265                 .data = &cmos_driver_data,
7266         },
7267         {
7268                 .init = led_init,
7269                 .data = &led_driver_data,
7270         },
7271         {
7272                 .init = beep_init,
7273                 .data = &beep_driver_data,
7274         },
7275         {
7276                 .init = thermal_init,
7277                 .data = &thermal_driver_data,
7278         },
7279         {
7280                 .data = &ecdump_driver_data,
7281         },
7282         {
7283                 .init = brightness_init,
7284                 .data = &brightness_driver_data,
7285         },
7286         {
7287                 .data = &volume_driver_data,
7288         },
7289         {
7290                 .init = fan_init,
7291                 .data = &fan_driver_data,
7292         },
7293 };
7294
7295 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
7296 {
7297         unsigned int i;
7298         struct ibm_struct *ibm;
7299
7300         if (!kp || !kp->name || !val)
7301                 return -EINVAL;
7302
7303         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7304                 ibm = ibms_init[i].data;
7305                 WARN_ON(ibm == NULL);
7306
7307                 if (!ibm || !ibm->name)
7308                         continue;
7309
7310                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
7311                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
7312                                 return -ENOSPC;
7313                         strcpy(ibms_init[i].param, val);
7314                         strcat(ibms_init[i].param, ",");
7315                         return 0;
7316                 }
7317         }
7318
7319         return -EINVAL;
7320 }
7321
7322 module_param(experimental, int, 0);
7323 MODULE_PARM_DESC(experimental,
7324                  "Enables experimental features when non-zero");
7325
7326 module_param_named(debug, dbg_level, uint, 0);
7327 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
7328
7329 module_param(force_load, bool, 0);
7330 MODULE_PARM_DESC(force_load,
7331                  "Attempts to load the driver even on a "
7332                  "mis-identified ThinkPad when true");
7333
7334 module_param_named(fan_control, fan_control_allowed, bool, 0);
7335 MODULE_PARM_DESC(fan_control,
7336                  "Enables setting fan parameters features when true");
7337
7338 module_param_named(brightness_mode, brightness_mode, int, 0);
7339 MODULE_PARM_DESC(brightness_mode,
7340                  "Selects brightness control strategy: "
7341                  "0=auto, 1=EC, 2=CMOS, 3=both");
7342
7343 module_param(brightness_enable, uint, 0);
7344 MODULE_PARM_DESC(brightness_enable,
7345                  "Enables backlight control when 1, disables when 0");
7346
7347 module_param(hotkey_report_mode, uint, 0);
7348 MODULE_PARM_DESC(hotkey_report_mode,
7349                  "used for backwards compatibility with userspace, "
7350                  "see documentation");
7351
7352 #define TPACPI_PARAM(feature) \
7353         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
7354         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
7355                          "at module load, see documentation")
7356
7357 TPACPI_PARAM(hotkey);
7358 TPACPI_PARAM(bluetooth);
7359 TPACPI_PARAM(video);
7360 TPACPI_PARAM(light);
7361 #ifdef CONFIG_THINKPAD_ACPI_DOCK
7362 TPACPI_PARAM(dock);
7363 #endif
7364 #ifdef CONFIG_THINKPAD_ACPI_BAY
7365 TPACPI_PARAM(bay);
7366 #endif /* CONFIG_THINKPAD_ACPI_BAY */
7367 TPACPI_PARAM(cmos);
7368 TPACPI_PARAM(led);
7369 TPACPI_PARAM(beep);
7370 TPACPI_PARAM(ecdump);
7371 TPACPI_PARAM(brightness);
7372 TPACPI_PARAM(volume);
7373 TPACPI_PARAM(fan);
7374
7375 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES
7376 module_param(dbg_wlswemul, uint, 0);
7377 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation");
7378 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0);
7379 MODULE_PARM_DESC(wlsw_state,
7380                  "Initial state of the emulated WLSW switch");
7381
7382 module_param(dbg_bluetoothemul, uint, 0);
7383 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation");
7384 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0);
7385 MODULE_PARM_DESC(bluetooth_state,
7386                  "Initial state of the emulated bluetooth switch");
7387
7388 module_param(dbg_wwanemul, uint, 0);
7389 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation");
7390 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0);
7391 MODULE_PARM_DESC(wwan_state,
7392                  "Initial state of the emulated WWAN switch");
7393
7394 module_param(dbg_uwbemul, uint, 0);
7395 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation");
7396 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0);
7397 MODULE_PARM_DESC(uwb_state,
7398                  "Initial state of the emulated UWB switch");
7399 #endif
7400
7401 static void thinkpad_acpi_module_exit(void)
7402 {
7403         struct ibm_struct *ibm, *itmp;
7404
7405         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
7406
7407         list_for_each_entry_safe_reverse(ibm, itmp,
7408                                          &tpacpi_all_drivers,
7409                                          all_drivers) {
7410                 ibm_exit(ibm);
7411         }
7412
7413         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
7414
7415         if (tpacpi_inputdev) {
7416                 if (tp_features.input_device_registered)
7417                         input_unregister_device(tpacpi_inputdev);
7418                 else
7419                         input_free_device(tpacpi_inputdev);
7420         }
7421
7422         if (tpacpi_hwmon)
7423                 hwmon_device_unregister(tpacpi_hwmon);
7424
7425         if (tp_features.sensors_pdev_attrs_registered)
7426                 device_remove_file(&tpacpi_sensors_pdev->dev,
7427                                    &dev_attr_thinkpad_acpi_pdev_name);
7428         if (tpacpi_sensors_pdev)
7429                 platform_device_unregister(tpacpi_sensors_pdev);
7430         if (tpacpi_pdev)
7431                 platform_device_unregister(tpacpi_pdev);
7432
7433         if (tp_features.sensors_pdrv_attrs_registered)
7434                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
7435         if (tp_features.platform_drv_attrs_registered)
7436                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
7437
7438         if (tp_features.sensors_pdrv_registered)
7439                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
7440
7441         if (tp_features.platform_drv_registered)
7442                 platform_driver_unregister(&tpacpi_pdriver);
7443
7444         if (proc_dir)
7445                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
7446
7447         if (tpacpi_wq)
7448                 destroy_workqueue(tpacpi_wq);
7449
7450         kfree(thinkpad_id.bios_version_str);
7451         kfree(thinkpad_id.ec_version_str);
7452         kfree(thinkpad_id.model_str);
7453 }
7454
7455
7456 static int __init thinkpad_acpi_module_init(void)
7457 {
7458         int ret, i;
7459
7460         tpacpi_lifecycle = TPACPI_LIFE_INIT;
7461
7462         /* Parameter checking */
7463         if (hotkey_report_mode > 2)
7464                 return -EINVAL;
7465
7466         /* Driver-level probe */
7467
7468         ret = get_thinkpad_model_data(&thinkpad_id);
7469         if (ret) {
7470                 printk(TPACPI_ERR
7471                         "unable to get DMI data: %d\n", ret);
7472                 thinkpad_acpi_module_exit();
7473                 return ret;
7474         }
7475         ret = probe_for_thinkpad();
7476         if (ret) {
7477                 thinkpad_acpi_module_exit();
7478                 return ret;
7479         }
7480
7481         /* Driver initialization */
7482
7483         TPACPI_ACPIHANDLE_INIT(ecrd);
7484         TPACPI_ACPIHANDLE_INIT(ecwr);
7485
7486         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
7487         if (!tpacpi_wq) {
7488                 thinkpad_acpi_module_exit();
7489                 return -ENOMEM;
7490         }
7491
7492         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
7493         if (!proc_dir) {
7494                 printk(TPACPI_ERR
7495                        "unable to create proc dir " TPACPI_PROC_DIR);
7496                 thinkpad_acpi_module_exit();
7497                 return -ENODEV;
7498         }
7499         proc_dir->owner = THIS_MODULE;
7500
7501         ret = platform_driver_register(&tpacpi_pdriver);
7502         if (ret) {
7503                 printk(TPACPI_ERR
7504                        "unable to register main platform driver\n");
7505                 thinkpad_acpi_module_exit();
7506                 return ret;
7507         }
7508         tp_features.platform_drv_registered = 1;
7509
7510         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
7511         if (ret) {
7512                 printk(TPACPI_ERR
7513                        "unable to register hwmon platform driver\n");
7514                 thinkpad_acpi_module_exit();
7515                 return ret;
7516         }
7517         tp_features.sensors_pdrv_registered = 1;
7518
7519         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
7520         if (!ret) {
7521                 tp_features.platform_drv_attrs_registered = 1;
7522                 ret = tpacpi_create_driver_attributes(
7523                                         &tpacpi_hwmon_pdriver.driver);
7524         }
7525         if (ret) {
7526                 printk(TPACPI_ERR
7527                        "unable to create sysfs driver attributes\n");
7528                 thinkpad_acpi_module_exit();
7529                 return ret;
7530         }
7531         tp_features.sensors_pdrv_attrs_registered = 1;
7532
7533
7534         /* Device initialization */
7535         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
7536                                                         NULL, 0);
7537         if (IS_ERR(tpacpi_pdev)) {
7538                 ret = PTR_ERR(tpacpi_pdev);
7539                 tpacpi_pdev = NULL;
7540                 printk(TPACPI_ERR "unable to register platform device\n");
7541                 thinkpad_acpi_module_exit();
7542                 return ret;
7543         }
7544         tpacpi_sensors_pdev = platform_device_register_simple(
7545                                                 TPACPI_HWMON_DRVR_NAME,
7546                                                 -1, NULL, 0);
7547         if (IS_ERR(tpacpi_sensors_pdev)) {
7548                 ret = PTR_ERR(tpacpi_sensors_pdev);
7549                 tpacpi_sensors_pdev = NULL;
7550                 printk(TPACPI_ERR
7551                        "unable to register hwmon platform device\n");
7552                 thinkpad_acpi_module_exit();
7553                 return ret;
7554         }
7555         ret = device_create_file(&tpacpi_sensors_pdev->dev,
7556                                  &dev_attr_thinkpad_acpi_pdev_name);
7557         if (ret) {
7558                 printk(TPACPI_ERR
7559                        "unable to create sysfs hwmon device attributes\n");
7560                 thinkpad_acpi_module_exit();
7561                 return ret;
7562         }
7563         tp_features.sensors_pdev_attrs_registered = 1;
7564         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
7565         if (IS_ERR(tpacpi_hwmon)) {
7566                 ret = PTR_ERR(tpacpi_hwmon);
7567                 tpacpi_hwmon = NULL;
7568                 printk(TPACPI_ERR "unable to register hwmon device\n");
7569                 thinkpad_acpi_module_exit();
7570                 return ret;
7571         }
7572         mutex_init(&tpacpi_inputdev_send_mutex);
7573         tpacpi_inputdev = input_allocate_device();
7574         if (!tpacpi_inputdev) {
7575                 printk(TPACPI_ERR "unable to allocate input device\n");
7576                 thinkpad_acpi_module_exit();
7577                 return -ENOMEM;
7578         } else {
7579                 /* Prepare input device, but don't register */
7580                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
7581                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
7582                 tpacpi_inputdev->id.bustype = BUS_HOST;
7583                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
7584                                                 thinkpad_id.vendor :
7585                                                 PCI_VENDOR_ID_IBM;
7586                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
7587                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
7588         }
7589         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
7590                 ret = ibm_init(&ibms_init[i]);
7591                 if (ret >= 0 && *ibms_init[i].param)
7592                         ret = ibms_init[i].data->write(ibms_init[i].param);
7593                 if (ret < 0) {
7594                         thinkpad_acpi_module_exit();
7595                         return ret;
7596                 }
7597         }
7598         ret = input_register_device(tpacpi_inputdev);
7599         if (ret < 0) {
7600                 printk(TPACPI_ERR "unable to register input device\n");
7601                 thinkpad_acpi_module_exit();
7602                 return ret;
7603         } else {
7604                 tp_features.input_device_registered = 1;
7605         }
7606
7607         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
7608         return 0;
7609 }
7610
7611 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
7612
7613 /*
7614  * DMI matching for module autoloading
7615  *
7616  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
7617  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
7618  *
7619  * Only models listed in thinkwiki will be supported, so add yours
7620  * if it is not there yet.
7621  */
7622 #define IBM_BIOS_MODULE_ALIAS(__type) \
7623         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*")
7624
7625 /* Non-ancient thinkpads */
7626 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
7627 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
7628
7629 /* Ancient thinkpad BIOSes have to be identified by
7630  * BIOS type or model number, and there are far less
7631  * BIOS types than model numbers... */
7632 IBM_BIOS_MODULE_ALIAS("I[BDHIMNOTWVYZ]");
7633 IBM_BIOS_MODULE_ALIAS("1[0368A-GIKM-PST]");
7634 IBM_BIOS_MODULE_ALIAS("K[UX-Z]");
7635
7636 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
7637 MODULE_DESCRIPTION(TPACPI_DESC);
7638 MODULE_VERSION(TPACPI_VERSION);
7639 MODULE_LICENSE("GPL");
7640
7641 module_init(thinkpad_acpi_module_init);
7642 module_exit(thinkpad_acpi_module_exit);