drivers/platform/x86/acer-wmi.c

   1 /*
   2  *  Acer WMI Laptop Extras
   3  *
   4  *  Copyright (C) 2007-2009     Carlos Corbacho <carlos@strangeworlds.co.uk>
   5  *
   6  *  Based on acer_acpi:
   7  *    Copyright (C) 2005-2007   E.M. Smith
   8  *    Copyright (C) 2007-2008   Carlos Corbacho <cathectic@gmail.com>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/dmi.h>
  32 #include <linux/fb.h>
  33 #include <linux/backlight.h>
  34 #include <linux/leds.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/acpi.h>
  37 #include <linux/i8042.h>
  38 #include <linux/rfkill.h>
  39 #include <linux/workqueue.h>
  40 #include <linux/debugfs.h>
  41 #include <linux/slab.h>
  42 #include <linux/input.h>
  43 #include <linux/input/sparse-keymap.h>
  44
  45 #include <acpi/acpi_drivers.h>
  46
  47 MODULE_AUTHOR("Carlos Corbacho");
  48 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * Magic Number
  53  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  54  * (it's also used in acerhk when directly accessing the BIOS)
  55  */
  56 #define ACER_AMW0_WRITE 0x9610
  57
  58 /*
  59  * Bit masks for the AMW0 interface
  60  */
  61 #define ACER_AMW0_WIRELESS_MASK  0x35
  62 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  63 #define ACER_AMW0_MAILLED_MASK   0x31
  64
  65 /*
  66  * Method IDs for WMID interface
  67  */
  68 #define ACER_WMID_GET_WIRELESS_METHODID         1
  69 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  70 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  71 #define ACER_WMID_SET_WIRELESS_METHODID         4
  72 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  73 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  74 #define ACER_WMID_GET_THREEG_METHODID           10
  75 #define ACER_WMID_SET_THREEG_METHODID           11
  76
  77 /*
  78  * Acer ACPI method GUIDs
  79  */
  80 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  81 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  82 #define WMID_GUID1              "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
  83 #define WMID_GUID2              "95764E09-FB56-4E83-B31A-37761F60994A"
  84 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
  85
  86 /*
  87  * Acer ACPI event GUIDs
  88  */
  89 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
  90
  91 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  92 MODULE_ALIAS("wmi:6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3");
  93 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
  94
  95 enum acer_wmi_event_ids {
  96         WMID_HOTKEY_EVENT = 0x1,
  97 };
  98
  99 static const struct key_entry acer_wmi_keymap[] = {
 100         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
 101         {KE_KEY, 0x03, {KEY_WLAN} },     /* WiFi */
 102         {KE_KEY, 0x04, {KEY_WLAN} },     /* WiFi */
 103         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
 104         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
 105         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
 106         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
 107         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
 108         {KE_KEY, 0x29, {KEY_PROG3} },    /* P_Key for TM8372 */
 109         {KE_IGNORE, 0x41, {KEY_MUTE} },
 110         {KE_IGNORE, 0x42, {KEY_PREVIOUSSONG} },
 111         {KE_IGNORE, 0x4d, {KEY_PREVIOUSSONG} },
 112         {KE_IGNORE, 0x43, {KEY_NEXTSONG} },
 113         {KE_IGNORE, 0x4e, {KEY_NEXTSONG} },
 114         {KE_IGNORE, 0x44, {KEY_PLAYPAUSE} },
 115         {KE_IGNORE, 0x4f, {KEY_PLAYPAUSE} },
 116         {KE_IGNORE, 0x45, {KEY_STOP} },
 117         {KE_IGNORE, 0x50, {KEY_STOP} },
 118         {KE_IGNORE, 0x48, {KEY_VOLUMEUP} },
 119         {KE_IGNORE, 0x49, {KEY_VOLUMEDOWN} },
 120         {KE_IGNORE, 0x4a, {KEY_VOLUMEDOWN} },
 121         {KE_IGNORE, 0x61, {KEY_SWITCHVIDEOMODE} },
 122         {KE_IGNORE, 0x62, {KEY_BRIGHTNESSUP} },
 123         {KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
 124         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
 125         {KE_IGNORE, 0x81, {KEY_SLEEP} },
 126         {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad On/Off */
 127         {KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
 128         {KE_END, 0}
 129 };
 130
 131 static struct input_dev *acer_wmi_input_dev;
 132
 133 struct event_return_value {
 134         u8 function;
 135         u8 key_num;
 136         u16 device_state;
 137         u32 reserved;
 138 } __attribute__((packed));
 139
 140 /*
 141  * GUID3 Get Device Status device flags
 142  */
 143 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
 144 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
 145 #define ACER_WMID3_GDS_WIMAX            (1<<7)  /* WiMAX */
 146 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
 147
 148 struct lm_input_params {
 149         u8 function_num;        /* Function Number */
 150         u16 commun_devices;     /* Communication type devices default status */
 151         u16 devices;            /* Other type devices default status */
 152         u8 lm_status;           /* Launch Manager Status */
 153         u16 reserved;
 154 } __attribute__((packed));
 155
 156 struct lm_return_value {
 157         u8 error_code;          /* Error Code */
 158         u8 ec_return_value;     /* EC Return Value */
 159         u16 reserved;
 160 } __attribute__((packed));
 161
 162 struct wmid3_gds_set_input_param {     /* Set Device Status input parameter */
 163         u8 function_num;        /* Function Number */
 164         u8 hotkey_number;       /* Hotkey Number */
 165         u16 devices;            /* Set Device */
 166         u8 volume_value;        /* Volume Value */
 167 } __attribute__((packed));
 168
 169 struct wmid3_gds_get_input_param {     /* Get Device Status input parameter */
 170         u8 function_num;        /* Function Number */
 171         u8 hotkey_number;       /* Hotkey Number */
 172         u16 devices;            /* Get Device */
 173 } __attribute__((packed));
 174
 175 struct wmid3_gds_return_value { /* Get Device Status return value*/
 176         u8 error_code;          /* Error Code */
 177         u8 ec_return_value;     /* EC Return Value */
 178         u16 devices;            /* Current Device Status */
 179         u32 reserved;
 180 } __attribute__((packed));
 181
 182 struct hotkey_function_type_aa {
 183         u8 type;
 184         u8 length;
 185         u16 handle;
 186         u16 commun_func_bitmap;
 187         u16 application_func_bitmap;
 188         u16 media_func_bitmap;
 189         u16 display_func_bitmap;
 190         u16 others_func_bitmap;
 191         u8 commun_fn_key_number;
 192 } __attribute__((packed));
 193
 194 /*
 195  * Interface capability flags
 196  */
 197 #define ACER_CAP_MAILLED                (1<<0)
 198 #define ACER_CAP_WIRELESS               (1<<1)
 199 #define ACER_CAP_BLUETOOTH              (1<<2)
 200 #define ACER_CAP_BRIGHTNESS             (1<<3)
 201 #define ACER_CAP_THREEG                 (1<<4)
 202 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 203
 204 /*
 205  * Interface type flags
 206  */
 207 enum interface_flags {
 208         ACER_AMW0,
 209         ACER_AMW0_V2,
 210         ACER_WMID,
 211         ACER_WMID_v2,
 212 };
 213
 214 #define ACER_DEFAULT_WIRELESS  0
 215 #define ACER_DEFAULT_BLUETOOTH 0
 216 #define ACER_DEFAULT_MAILLED   0
 217 #define ACER_DEFAULT_THREEG    0
 218
 219 static int max_brightness = 0xF;
 220
 221 static int mailled = -1;
 222 static int brightness = -1;
 223 static int threeg = -1;
 224 static int force_series;
 225 static bool ec_raw_mode;
 226 static bool has_type_aa;
 227 static u16 commun_func_bitmap;
 228 static u8 commun_fn_key_number;
 229
 230 module_param(mailled, int, 0444);
 231 module_param(brightness, int, 0444);
 232 module_param(threeg, int, 0444);
 233 module_param(force_series, int, 0444);
 234 module_param(ec_raw_mode, bool, 0444);
 235 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 236 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 237 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 238 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 239 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
 240
 241 struct acer_data {
 242         int mailled;
 243         int threeg;
 244         int brightness;
 245 };
 246
 247 struct acer_debug {
 248         struct dentry *root;
 249         struct dentry *devices;
 250         u32 wmid_devices;
 251 };
 252
 253 static struct rfkill *wireless_rfkill;
 254 static struct rfkill *bluetooth_rfkill;
 255 static struct rfkill *threeg_rfkill;
 256 static bool rfkill_inited;
 257
 258 /* Each low-level interface must define at least some of the following */
 259 struct wmi_interface {
 260         /* The WMI device type */
 261         u32 type;
 262
 263         /* The capabilities this interface provides */
 264         u32 capability;
 265
 266         /* Private data for the current interface */
 267         struct acer_data data;
 268
 269         /* debugfs entries associated with this interface */
 270         struct acer_debug debug;
 271 };
 272
 273 /* The static interface pointer, points to the currently detected interface */
 274 static struct wmi_interface *interface;
 275
 276 /*
 277  * Embedded Controller quirks
 278  * Some laptops require us to directly access the EC to either enable or query
 279  * features that are not available through WMI.
 280  */
 281
 282 struct quirk_entry {
 283         u8 wireless;
 284         u8 mailled;
 285         s8 brightness;
 286         u8 bluetooth;
 287 };
 288
 289 static struct quirk_entry *quirks;
 290
 291 static void set_quirks(void)
 292 {
 293         if (!interface)
 294                 return;
 295
 296         if (quirks->mailled)
 297                 interface->capability |= ACER_CAP_MAILLED;
 298
 299         if (quirks->brightness)
 300                 interface->capability |= ACER_CAP_BRIGHTNESS;
 301 }
 302
 303 static int dmi_matched(const struct dmi_system_id *dmi)
 304 {
 305         quirks = dmi->driver_data;
 306         return 1;
 307 }
 308
 309 static struct quirk_entry quirk_unknown = {
 310 };
 311
 312 static struct quirk_entry quirk_acer_aspire_1520 = {
 313         .brightness = -1,
 314 };
 315
 316 static struct quirk_entry quirk_acer_travelmate_2490 = {
 317         .mailled = 1,
 318 };
 319
 320 /* This AMW0 laptop has no bluetooth */
 321 static struct quirk_entry quirk_medion_md_98300 = {
 322         .wireless = 1,
 323 };
 324
 325 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 326         .wireless = 2,
 327 };
 328
 329 static struct quirk_entry quirk_lenovo_ideapad_s205 = {
 330         .wireless = 3,
 331 };
 332
 333 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 334 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 335         {
 336                 .ident = "Acer Aspire One (SSD)",
 337                 .matches = {
 338                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 339                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 340                 },
 341         },
 342         {
 343                 .ident = "Acer Aspire One (HDD)",
 344                 .matches = {
 345                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 346                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 347                 },
 348         },
 349         {}
 350 };
 351
 352 static struct dmi_system_id acer_quirks[] = {
 353         {
 354                 .callback = dmi_matched,
 355                 .ident = "Acer Aspire 1360",
 356                 .matches = {
 357                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 358                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 359                 },
 360                 .driver_data = &quirk_acer_aspire_1520,
 361         },
 362         {
 363                 .callback = dmi_matched,
 364                 .ident = "Acer Aspire 1520",
 365                 .matches = {
 366                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 367                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 368                 },
 369                 .driver_data = &quirk_acer_aspire_1520,
 370         },
 371         {
 372                 .callback = dmi_matched,
 373                 .ident = "Acer Aspire 3100",
 374                 .matches = {
 375                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 376                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 377                 },
 378                 .driver_data = &quirk_acer_travelmate_2490,
 379         },
 380         {
 381                 .callback = dmi_matched,
 382                 .ident = "Acer Aspire 3610",
 383                 .matches = {
 384                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 385                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 386                 },
 387                 .driver_data = &quirk_acer_travelmate_2490,
 388         },
 389         {
 390                 .callback = dmi_matched,
 391                 .ident = "Acer Aspire 5100",
 392                 .matches = {
 393                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 394                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 395                 },
 396                 .driver_data = &quirk_acer_travelmate_2490,
 397         },
 398         {
 399                 .callback = dmi_matched,
 400                 .ident = "Acer Aspire 5610",
 401                 .matches = {
 402                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 403                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 404                 },
 405                 .driver_data = &quirk_acer_travelmate_2490,
 406         },
 407         {
 408                 .callback = dmi_matched,
 409                 .ident = "Acer Aspire 5630",
 410                 .matches = {
 411                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 412                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 413                 },
 414                 .driver_data = &quirk_acer_travelmate_2490,
 415         },
 416         {
 417                 .callback = dmi_matched,
 418                 .ident = "Acer Aspire 5650",
 419                 .matches = {
 420                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 421                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 422                 },
 423                 .driver_data = &quirk_acer_travelmate_2490,
 424         },
 425         {
 426                 .callback = dmi_matched,
 427                 .ident = "Acer Aspire 5680",
 428                 .matches = {
 429                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 430                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 431                 },
 432                 .driver_data = &quirk_acer_travelmate_2490,
 433         },
 434         {
 435                 .callback = dmi_matched,
 436                 .ident = "Acer Aspire 9110",
 437                 .matches = {
 438                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 439                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 440                 },
 441                 .driver_data = &quirk_acer_travelmate_2490,
 442         },
 443         {
 444                 .callback = dmi_matched,
 445                 .ident = "Acer TravelMate 2490",
 446                 .matches = {
 447                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 448                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 449                 },
 450                 .driver_data = &quirk_acer_travelmate_2490,
 451         },
 452         {
 453                 .callback = dmi_matched,
 454                 .ident = "Acer TravelMate 4200",
 455                 .matches = {
 456                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 457                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 458                 },
 459                 .driver_data = &quirk_acer_travelmate_2490,
 460         },
 461         {
 462                 .callback = dmi_matched,
 463                 .ident = "Fujitsu Siemens Amilo Li 1718",
 464                 .matches = {
 465                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 466                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 467                 },
 468                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 469         },
 470         {
 471                 .callback = dmi_matched,
 472                 .ident = "Medion MD 98300",
 473                 .matches = {
 474                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 475                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 476                 },
 477                 .driver_data = &quirk_medion_md_98300,
 478         },
 479         {
 480                 .callback = dmi_matched,
 481                 .ident = "Lenovo Ideapad S205",
 482                 .matches = {
 483                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 484                         DMI_MATCH(DMI_PRODUCT_NAME, "10382LG"),
 485                 },
 486                 .driver_data = &quirk_lenovo_ideapad_s205,
 487         },
 488         {
 489                 .callback = dmi_matched,
 490                 .ident = "Lenovo Ideapad S205 (Brazos)",
 491                 .matches = {
 492                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 493                         DMI_MATCH(DMI_PRODUCT_NAME, "Brazos"),
 494                 },
 495                 .driver_data = &quirk_lenovo_ideapad_s205,
 496         },
 497         {
 498                 .callback = dmi_matched,
 499                 .ident = "Lenovo 3000 N200",
 500                 .matches = {
 501                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 502                         DMI_MATCH(DMI_PRODUCT_NAME, "0687A31"),
 503                 },
 504                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 505         },
 506         {}
 507 };
 508
 509 /* Find which quirks are needed for a particular vendor/ model pair */
 510 static void find_quirks(void)
 511 {
 512         if (!force_series) {
 513                 dmi_check_system(acer_quirks);
 514         } else if (force_series == 2490) {
 515                 quirks = &quirk_acer_travelmate_2490;
 516         }
 517
 518         if (quirks == NULL)
 519                 quirks = &quirk_unknown;
 520
 521         set_quirks();
 522 }
 523
 524 /*
 525  * General interface convenience methods
 526  */
 527
 528 static bool has_cap(u32 cap)
 529 {
 530         if ((interface->capability & cap) != 0)
 531                 return 1;
 532
 533         return 0;
 534 }
 535
 536 /*
 537  * AMW0 (V1) interface
 538  */
 539 struct wmab_args {
 540         u32 eax;
 541         u32 ebx;
 542         u32 ecx;
 543         u32 edx;
 544 };
 545
 546 struct wmab_ret {
 547         u32 eax;
 548         u32 ebx;
 549         u32 ecx;
 550         u32 edx;
 551         u32 eex;
 552 };
 553
 554 static acpi_status wmab_execute(struct wmab_args *regbuf,
 555 struct acpi_buffer *result)
 556 {
 557         struct acpi_buffer input;
 558         acpi_status status;
 559         input.length = sizeof(struct wmab_args);
 560         input.pointer = (u8 *)regbuf;
 561
 562         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 563
 564         return status;
 565 }
 566
 567 static acpi_status AMW0_get_u32(u32 *value, u32 cap)
 568 {
 569         int err;
 570         u8 result;
 571
 572         switch (cap) {
 573         case ACER_CAP_MAILLED:
 574                 switch (quirks->mailled) {
 575                 default:
 576                         err = ec_read(0xA, &result);
 577                         if (err)
 578                                 return AE_ERROR;
 579                         *value = (result >> 7) & 0x1;
 580                         return AE_OK;
 581                 }
 582                 break;
 583         case ACER_CAP_WIRELESS:
 584                 switch (quirks->wireless) {
 585                 case 1:
 586                         err = ec_read(0x7B, &result);
 587                         if (err)
 588                                 return AE_ERROR;
 589                         *value = result & 0x1;
 590                         return AE_OK;
 591                 case 2:
 592                         err = ec_read(0x71, &result);
 593                         if (err)
 594                                 return AE_ERROR;
 595                         *value = result & 0x1;
 596                         return AE_OK;
 597                 case 3:
 598                         err = ec_read(0x78, &result);
 599                         if (err)
 600                                 return AE_ERROR;
 601                         *value = result & 0x1;
 602                         return AE_OK;
 603                 default:
 604                         err = ec_read(0xA, &result);
 605                         if (err)
 606                                 return AE_ERROR;
 607                         *value = (result >> 2) & 0x1;
 608                         return AE_OK;
 609                 }
 610                 break;
 611         case ACER_CAP_BLUETOOTH:
 612                 switch (quirks->bluetooth) {
 613                 default:
 614                         err = ec_read(0xA, &result);
 615                         if (err)
 616                                 return AE_ERROR;
 617                         *value = (result >> 4) & 0x1;
 618                         return AE_OK;
 619                 }
 620                 break;
 621         case ACER_CAP_BRIGHTNESS:
 622                 switch (quirks->brightness) {
 623                 default:
 624                         err = ec_read(0x83, &result);
 625                         if (err)
 626                                 return AE_ERROR;
 627                         *value = result;
 628                         return AE_OK;
 629                 }
 630                 break;
 631         default:
 632                 return AE_ERROR;
 633         }
 634         return AE_OK;
 635 }
 636
 637 static acpi_status AMW0_set_u32(u32 value, u32 cap)
 638 {
 639         struct wmab_args args;
 640
 641         args.eax = ACER_AMW0_WRITE;
 642         args.ebx = value ? (1<<8) : 0;
 643         args.ecx = args.edx = 0;
 644
 645         switch (cap) {
 646         case ACER_CAP_MAILLED:
 647                 if (value > 1)
 648                         return AE_BAD_PARAMETER;
 649                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 650                 break;
 651         case ACER_CAP_WIRELESS:
 652                 if (value > 1)
 653                         return AE_BAD_PARAMETER;
 654                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 655                 break;
 656         case ACER_CAP_BLUETOOTH:
 657                 if (value > 1)
 658                         return AE_BAD_PARAMETER;
 659                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 660                 break;
 661         case ACER_CAP_BRIGHTNESS:
 662                 if (value > max_brightness)
 663                         return AE_BAD_PARAMETER;
 664                 switch (quirks->brightness) {
 665                 default:
 666                         return ec_write(0x83, value);
 667                         break;
 668                 }
 669         default:
 670                 return AE_ERROR;
 671         }
 672
 673         /* Actually do the set */
 674         return wmab_execute(&args, NULL);
 675 }
 676
 677 static acpi_status AMW0_find_mailled(void)
 678 {
 679         struct wmab_args args;
 680         struct wmab_ret ret;
 681         acpi_status status = AE_OK;
 682         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 683         union acpi_object *obj;
 684
 685         args.eax = 0x86;
 686         args.ebx = args.ecx = args.edx = 0;
 687
 688         status = wmab_execute(&args, &out);
 689         if (ACPI_FAILURE(status))
 690                 return status;
 691
 692         obj = (union acpi_object *) out.pointer;
 693         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 694         obj->buffer.length == sizeof(struct wmab_ret)) {
 695                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 696         } else {
 697                 kfree(out.pointer);
 698                 return AE_ERROR;
 699         }
 700
 701         if (ret.eex & 0x1)
 702                 interface->capability |= ACER_CAP_MAILLED;
 703
 704         kfree(out.pointer);
 705
 706         return AE_OK;
 707 }
 708
 709 static int AMW0_set_cap_acpi_check_device_found;
 710
 711 static acpi_status AMW0_set_cap_acpi_check_device_cb(acpi_handle handle,
 712         u32 level, void *context, void **retval)
 713 {
 714         AMW0_set_cap_acpi_check_device_found = 1;
 715         return AE_OK;
 716 }
 717
 718 static const struct acpi_device_id norfkill_ids[] = {
 719         { "VPC2004", 0},
 720         { "IBM0068", 0},
 721         { "LEN0068", 0},
 722         { "", 0},
 723 };
 724
 725 static int AMW0_set_cap_acpi_check_device(void)
 726 {
 727         const struct acpi_device_id *id;
 728
 729         for (id = norfkill_ids; id->id[0]; id++)
 730                 acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
 731                                 NULL, NULL);
 732         return AMW0_set_cap_acpi_check_device_found;
 733 }
 734
 735 static acpi_status AMW0_set_capabilities(void)
 736 {
 737         struct wmab_args args;
 738         struct wmab_ret ret;
 739         acpi_status status;
 740         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 741         union acpi_object *obj;
 742
 743         /*
 744          * On laptops with this strange GUID (non Acer), normal probing doesn't
 745          * work.
 746          */
 747         if (wmi_has_guid(AMW0_GUID2)) {
 748                 if ((quirks != &quirk_unknown) ||
 749                     !AMW0_set_cap_acpi_check_device())
 750                         interface->capability |= ACER_CAP_WIRELESS;
 751                 return AE_OK;
 752         }
 753
 754         args.eax = ACER_AMW0_WRITE;
 755         args.ecx = args.edx = 0;
 756
 757         args.ebx = 0xa2 << 8;
 758         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 759
 760         status = wmab_execute(&args, &out);
 761         if (ACPI_FAILURE(status))
 762                 return status;
 763
 764         obj = out.pointer;
 765         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 766         obj->buffer.length == sizeof(struct wmab_ret)) {
 767                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 768         } else {
 769                 status = AE_ERROR;
 770                 goto out;
 771         }
 772
 773         if (ret.eax & 0x1)
 774                 interface->capability |= ACER_CAP_WIRELESS;
 775
 776         args.ebx = 2 << 8;
 777         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 778
 779         /*
 780          * It's ok to use existing buffer for next wmab_execute call.
 781          * But we need to kfree(out.pointer) if next wmab_execute fail.
 782          */
 783         status = wmab_execute(&args, &out);
 784         if (ACPI_FAILURE(status))
 785                 goto out;
 786
 787         obj = (union acpi_object *) out.pointer;
 788         if (obj && obj->type == ACPI_TYPE_BUFFER
 789         && obj->buffer.length == sizeof(struct wmab_ret)) {
 790                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 791         } else {
 792                 status = AE_ERROR;
 793                 goto out;
 794         }
 795
 796         if (ret.eax & 0x1)
 797                 interface->capability |= ACER_CAP_BLUETOOTH;
 798
 799         /*
 800          * This appears to be safe to enable, since all Wistron based laptops
 801          * appear to use the same EC register for brightness, even if they
 802          * differ for wireless, etc
 803          */
 804         if (quirks->brightness >= 0)
 805                 interface->capability |= ACER_CAP_BRIGHTNESS;
 806
 807         status = AE_OK;
 808 out:
 809         kfree(out.pointer);
 810         return status;
 811 }
 812
 813 static struct wmi_interface AMW0_interface = {
 814         .type = ACER_AMW0,
 815 };
 816
 817 static struct wmi_interface AMW0_V2_interface = {
 818         .type = ACER_AMW0_V2,
 819 };
 820
 821 /*
 822  * New interface (The WMID interface)
 823  */
 824 static acpi_status
 825 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 826 {
 827         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 828         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 829         union acpi_object *obj;
 830         u32 tmp;
 831         acpi_status status;
 832
 833         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 834
 835         if (ACPI_FAILURE(status))
 836                 return status;
 837
 838         obj = (union acpi_object *) result.pointer;
 839         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 840                 (obj->buffer.length == sizeof(u32) ||
 841                 obj->buffer.length == sizeof(u64))) {
 842                 tmp = *((u32 *) obj->buffer.pointer);
 843         } else if (obj->type == ACPI_TYPE_INTEGER) {
 844                 tmp = (u32) obj->integer.value;
 845         } else {
 846                 tmp = 0;
 847         }
 848
 849         if (out)
 850                 *out = tmp;
 851
 852         kfree(result.pointer);
 853
 854         return status;
 855 }
 856
 857 static acpi_status WMID_get_u32(u32 *value, u32 cap)
 858 {
 859         acpi_status status;
 860         u8 tmp;
 861         u32 result, method_id = 0;
 862
 863         switch (cap) {
 864         case ACER_CAP_WIRELESS:
 865                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 866                 break;
 867         case ACER_CAP_BLUETOOTH:
 868                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 869                 break;
 870         case ACER_CAP_BRIGHTNESS:
 871                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 872                 break;
 873         case ACER_CAP_THREEG:
 874                 method_id = ACER_WMID_GET_THREEG_METHODID;
 875                 break;
 876         case ACER_CAP_MAILLED:
 877                 if (quirks->mailled == 1) {
 878                         ec_read(0x9f, &tmp);
 879                         *value = tmp & 0x1;
 880                         return 0;
 881                 }
 882         default:
 883                 return AE_ERROR;
 884         }
 885         status = WMI_execute_u32(method_id, 0, &result);
 886
 887         if (ACPI_SUCCESS(status))
 888                 *value = (u8)result;
 889
 890         return status;
 891 }
 892
 893 static acpi_status WMID_set_u32(u32 value, u32 cap)
 894 {
 895         u32 method_id = 0;
 896         char param;
 897
 898         switch (cap) {
 899         case ACER_CAP_BRIGHTNESS:
 900                 if (value > max_brightness)
 901                         return AE_BAD_PARAMETER;
 902                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 903                 break;
 904         case ACER_CAP_WIRELESS:
 905                 if (value > 1)
 906                         return AE_BAD_PARAMETER;
 907                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 908                 break;
 909         case ACER_CAP_BLUETOOTH:
 910                 if (value > 1)
 911                         return AE_BAD_PARAMETER;
 912                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 913                 break;
 914         case ACER_CAP_THREEG:
 915                 if (value > 1)
 916                         return AE_BAD_PARAMETER;
 917                 method_id = ACER_WMID_SET_THREEG_METHODID;
 918                 break;
 919         case ACER_CAP_MAILLED:
 920                 if (value > 1)
 921                         return AE_BAD_PARAMETER;
 922                 if (quirks->mailled == 1) {
 923                         param = value ? 0x92 : 0x93;
 924                         i8042_lock_chip();
 925                         i8042_command(&param, 0x1059);
 926                         i8042_unlock_chip();
 927                         return 0;
 928                 }
 929                 break;
 930         default:
 931                 return AE_ERROR;
 932         }
 933         return WMI_execute_u32(method_id, (u32)value, NULL);
 934 }
 935
 936 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
 937 {
 938         struct wmid3_gds_return_value return_value;
 939         acpi_status status;
 940         union acpi_object *obj;
 941         struct wmid3_gds_get_input_param params = {
 942                 .function_num = 0x1,
 943                 .hotkey_number = commun_fn_key_number,
 944                 .devices = device,
 945         };
 946         struct acpi_buffer input = {
 947                 sizeof(struct wmid3_gds_get_input_param),
 948                 &params
 949         };
 950         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 951
 952         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 953         if (ACPI_FAILURE(status))
 954                 return status;
 955
 956         obj = output.pointer;
 957
 958         if (!obj)
 959                 return AE_ERROR;
 960         else if (obj->type != ACPI_TYPE_BUFFER) {
 961                 kfree(obj);
 962                 return AE_ERROR;
 963         }
 964         if (obj->buffer.length != 8) {
 965                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
 966                 kfree(obj);
 967                 return AE_ERROR;
 968         }
 969
 970         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
 971         kfree(obj);
 972
 973         if (return_value.error_code || return_value.ec_return_value)
 974                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
 975                         device,
 976                         return_value.error_code,
 977                         return_value.ec_return_value);
 978         else
 979                 *value = !!(return_value.devices & device);
 980
 981         return status;
 982 }
 983
 984 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
 985 {
 986         u16 device;
 987
 988         switch (cap) {
 989         case ACER_CAP_WIRELESS:
 990                 device = ACER_WMID3_GDS_WIRELESS;
 991                 break;
 992         case ACER_CAP_BLUETOOTH:
 993                 device = ACER_WMID3_GDS_BLUETOOTH;
 994                 break;
 995         case ACER_CAP_THREEG:
 996                 device = ACER_WMID3_GDS_THREEG;
 997                 break;
 998         default:
 999                 return AE_ERROR;
1000         }
1001         return wmid3_get_device_status(value, device);
1002 }
1003
1004 static acpi_status wmid3_set_device_status(u32 value, u16 device)
1005 {
1006         struct wmid3_gds_return_value return_value;
1007         acpi_status status;
1008         union acpi_object *obj;
1009         u16 devices;
1010         struct wmid3_gds_get_input_param get_params = {
1011                 .function_num = 0x1,
1012                 .hotkey_number = commun_fn_key_number,
1013                 .devices = commun_func_bitmap,
1014         };
1015         struct acpi_buffer get_input = {
1016                 sizeof(struct wmid3_gds_get_input_param),
1017                 &get_params
1018         };
1019         struct wmid3_gds_set_input_param set_params = {
1020                 .function_num = 0x2,
1021                 .hotkey_number = commun_fn_key_number,
1022                 .devices = commun_func_bitmap,
1023         };
1024         struct acpi_buffer set_input = {
1025                 sizeof(struct wmid3_gds_set_input_param),
1026                 &set_params
1027         };
1028         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1029         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
1030
1031         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &get_input, &output);
1032         if (ACPI_FAILURE(status))
1033                 return status;
1034
1035         obj = output.pointer;
1036
1037         if (!obj)
1038                 return AE_ERROR;
1039         else if (obj->type != ACPI_TYPE_BUFFER) {
1040                 kfree(obj);
1041                 return AE_ERROR;
1042         }
1043         if (obj->buffer.length != 8) {
1044                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1045                 kfree(obj);
1046                 return AE_ERROR;
1047         }
1048
1049         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1050         kfree(obj);
1051
1052         if (return_value.error_code || return_value.ec_return_value) {
1053                 pr_warn("Get Current Device Status failed: 0x%x - 0x%x\n",
1054                         return_value.error_code,
1055                         return_value.ec_return_value);
1056                 return status;
1057         }
1058
1059         devices = return_value.devices;
1060         set_params.devices = (value) ? (devices | device) : (devices & ~device);
1061
1062         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &set_input, &output2);
1063         if (ACPI_FAILURE(status))
1064                 return status;
1065
1066         obj = output2.pointer;
1067
1068         if (!obj)
1069                 return AE_ERROR;
1070         else if (obj->type != ACPI_TYPE_BUFFER) {
1071                 kfree(obj);
1072                 return AE_ERROR;
1073         }
1074         if (obj->buffer.length != 4) {
1075                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1076                 kfree(obj);
1077                 return AE_ERROR;
1078         }
1079
1080         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1081         kfree(obj);
1082
1083         if (return_value.error_code || return_value.ec_return_value)
1084                 pr_warn("Set Device Status failed: 0x%x - 0x%x\n",
1085                         return_value.error_code,
1086                         return_value.ec_return_value);
1087
1088         return status;
1089 }
1090
1091 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1092 {
1093         u16 device;
1094
1095         switch (cap) {
1096         case ACER_CAP_WIRELESS:
1097                 device = ACER_WMID3_GDS_WIRELESS;
1098                 break;
1099         case ACER_CAP_BLUETOOTH:
1100                 device = ACER_WMID3_GDS_BLUETOOTH;
1101                 break;
1102         case ACER_CAP_THREEG:
1103                 device = ACER_WMID3_GDS_THREEG;
1104                 break;
1105         default:
1106                 return AE_ERROR;
1107         }
1108         return wmid3_set_device_status(value, device);
1109 }
1110
1111 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
1112 {
1113         struct hotkey_function_type_aa *type_aa;
1114
1115         /* We are looking for OEM-specific Type AAh */
1116         if (header->type != 0xAA)
1117                 return;
1118
1119         has_type_aa = true;
1120         type_aa = (struct hotkey_function_type_aa *) header;
1121
1122         pr_info("Function bitmap for Communication Button: 0x%x\n",
1123                 type_aa->commun_func_bitmap);
1124         commun_func_bitmap = type_aa->commun_func_bitmap;
1125
1126         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1127                 interface->capability |= ACER_CAP_WIRELESS;
1128         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1129                 interface->capability |= ACER_CAP_THREEG;
1130         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1131                 interface->capability |= ACER_CAP_BLUETOOTH;
1132
1133         commun_fn_key_number = type_aa->commun_fn_key_number;
1134 }
1135
1136 static acpi_status WMID_set_capabilities(void)
1137 {
1138         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1139         union acpi_object *obj;
1140         acpi_status status;
1141         u32 devices;
1142
1143         status = wmi_query_block(WMID_GUID2, 1, &out);
1144         if (ACPI_FAILURE(status))
1145                 return status;
1146
1147         obj = (union acpi_object *) out.pointer;
1148         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1149                 (obj->buffer.length == sizeof(u32) ||
1150                 obj->buffer.length == sizeof(u64))) {
1151                 devices = *((u32 *) obj->buffer.pointer);
1152         } else if (obj->type == ACPI_TYPE_INTEGER) {
1153                 devices = (u32) obj->integer.value;
1154         } else {
1155                 kfree(out.pointer);
1156                 return AE_ERROR;
1157         }
1158
1159         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1160         if (devices & 0x07)
1161                 interface->capability |= ACER_CAP_WIRELESS;
1162         if (devices & 0x40)
1163                 interface->capability |= ACER_CAP_THREEG;
1164         if (devices & 0x10)
1165                 interface->capability |= ACER_CAP_BLUETOOTH;
1166
1167         if (!(devices & 0x20))
1168                 max_brightness = 0x9;
1169
1170         kfree(out.pointer);
1171         return status;
1172 }
1173
1174 static struct wmi_interface wmid_interface = {
1175         .type = ACER_WMID,
1176 };
1177
1178 static struct wmi_interface wmid_v2_interface = {
1179         .type = ACER_WMID_v2,
1180 };
1181
1182 /*
1183  * Generic Device (interface-independent)
1184  */
1185
1186 static acpi_status get_u32(u32 *value, u32 cap)
1187 {
1188         acpi_status status = AE_ERROR;
1189
1190         switch (interface->type) {
1191         case ACER_AMW0:
1192                 status = AMW0_get_u32(value, cap);
1193                 break;
1194         case ACER_AMW0_V2:
1195                 if (cap == ACER_CAP_MAILLED) {
1196                         status = AMW0_get_u32(value, cap);
1197                         break;
1198                 }
1199         case ACER_WMID:
1200                 status = WMID_get_u32(value, cap);
1201                 break;
1202         case ACER_WMID_v2:
1203                 if (cap & (ACER_CAP_WIRELESS |
1204                            ACER_CAP_BLUETOOTH |
1205                            ACER_CAP_THREEG))
1206                         status = wmid_v2_get_u32(value, cap);
1207                 else if (wmi_has_guid(WMID_GUID2))
1208                         status = WMID_get_u32(value, cap);
1209                 break;
1210         }
1211
1212         return status;
1213 }
1214
1215 static acpi_status set_u32(u32 value, u32 cap)
1216 {
1217         acpi_status status;
1218
1219         if (interface->capability & cap) {
1220                 switch (interface->type) {
1221                 case ACER_AMW0:
1222                         return AMW0_set_u32(value, cap);
1223                 case ACER_AMW0_V2:
1224                         if (cap == ACER_CAP_MAILLED)
1225                                 return AMW0_set_u32(value, cap);
1226
1227                         /*
1228                          * On some models, some WMID methods don't toggle
1229                          * properly. For those cases, we want to run the AMW0
1230                          * method afterwards to be certain we've really toggled
1231                          * the device state.
1232                          */
1233                         if (cap == ACER_CAP_WIRELESS ||
1234                                 cap == ACER_CAP_BLUETOOTH) {
1235                                 status = WMID_set_u32(value, cap);
1236                                 if (ACPI_FAILURE(status))
1237                                         return status;
1238
1239                                 return AMW0_set_u32(value, cap);
1240                         }
1241                 case ACER_WMID:
1242                         return WMID_set_u32(value, cap);
1243                 case ACER_WMID_v2:
1244                         if (cap & (ACER_CAP_WIRELESS |
1245                                    ACER_CAP_BLUETOOTH |
1246                                    ACER_CAP_THREEG))
1247                                 return wmid_v2_set_u32(value, cap);
1248                         else if (wmi_has_guid(WMID_GUID2))
1249                                 return WMID_set_u32(value, cap);
1250                 default:
1251                         return AE_BAD_PARAMETER;
1252                 }
1253         }
1254         return AE_BAD_PARAMETER;
1255 }
1256
1257 static void __init acer_commandline_init(void)
1258 {
1259         /*
1260          * These will all fail silently if the value given is invalid, or the
1261          * capability isn't available on the given interface
1262          */
1263         if (mailled >= 0)
1264                 set_u32(mailled, ACER_CAP_MAILLED);
1265         if (!has_type_aa && threeg >= 0)
1266                 set_u32(threeg, ACER_CAP_THREEG);
1267         if (brightness >= 0)
1268                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1269 }
1270
1271 /*
1272  * LED device (Mail LED only, no other LEDs known yet)
1273  */
1274 static void mail_led_set(struct led_classdev *led_cdev,
1275 enum led_brightness value)
1276 {
1277         set_u32(value, ACER_CAP_MAILLED);
1278 }
1279
1280 static struct led_classdev mail_led = {
1281         .name = "acer-wmi::mail",
1282         .brightness_set = mail_led_set,
1283 };
1284
1285 static int __devinit acer_led_init(struct device *dev)
1286 {
1287         return led_classdev_register(dev, &mail_led);
1288 }
1289
1290 static void acer_led_exit(void)
1291 {
1292         set_u32(LED_OFF, ACER_CAP_MAILLED);
1293         led_classdev_unregister(&mail_led);
1294 }
1295
1296 /*
1297  * Backlight device
1298  */
1299 static struct backlight_device *acer_backlight_device;
1300
1301 static int read_brightness(struct backlight_device *bd)
1302 {
1303         u32 value;
1304         get_u32(&value, ACER_CAP_BRIGHTNESS);
1305         return value;
1306 }
1307
1308 static int update_bl_status(struct backlight_device *bd)
1309 {
1310         int intensity = bd->props.brightness;
1311
1312         if (bd->props.power != FB_BLANK_UNBLANK)
1313                 intensity = 0;
1314         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1315                 intensity = 0;
1316
1317         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1318
1319         return 0;
1320 }
1321
1322 static const struct backlight_ops acer_bl_ops = {
1323         .get_brightness = read_brightness,
1324         .update_status = update_bl_status,
1325 };
1326
1327 static int __devinit acer_backlight_init(struct device *dev)
1328 {
1329         struct backlight_properties props;
1330         struct backlight_device *bd;
1331
1332         memset(&props, 0, sizeof(struct backlight_properties));
1333         props.type = BACKLIGHT_PLATFORM;
1334         props.max_brightness = max_brightness;
1335         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1336                                        &props);
1337         if (IS_ERR(bd)) {
1338                 pr_err("Could not register Acer backlight device\n");
1339                 acer_backlight_device = NULL;
1340                 return PTR_ERR(bd);
1341         }
1342
1343         acer_backlight_device = bd;
1344
1345         bd->props.power = FB_BLANK_UNBLANK;
1346         bd->props.brightness = read_brightness(bd);
1347         backlight_update_status(bd);
1348         return 0;
1349 }
1350
1351 static void acer_backlight_exit(void)
1352 {
1353         backlight_device_unregister(acer_backlight_device);
1354 }
1355
1356 /*
1357  * Rfkill devices
1358  */
1359 static void acer_rfkill_update(struct work_struct *ignored);
1360 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1361 static void acer_rfkill_update(struct work_struct *ignored)
1362 {
1363         u32 state;
1364         acpi_status status;
1365
1366         if (has_cap(ACER_CAP_WIRELESS)) {
1367                 status = get_u32(&state, ACER_CAP_WIRELESS);
1368                 if (ACPI_SUCCESS(status)) {
1369                         if (quirks->wireless == 3)
1370                                 rfkill_set_hw_state(wireless_rfkill, !state);
1371                         else
1372                                 rfkill_set_sw_state(wireless_rfkill, !state);
1373                 }
1374         }
1375
1376         if (has_cap(ACER_CAP_BLUETOOTH)) {
1377                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1378                 if (ACPI_SUCCESS(status))
1379                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1380         }
1381
1382         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1383                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1384                 if (ACPI_SUCCESS(status))
1385                         rfkill_set_sw_state(threeg_rfkill, !state);
1386         }
1387
1388         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1389 }
1390
1391 static int acer_rfkill_set(void *data, bool blocked)
1392 {
1393         acpi_status status;
1394         u32 cap = (unsigned long)data;
1395
1396         if (rfkill_inited) {
1397                 status = set_u32(!blocked, cap);
1398                 if (ACPI_FAILURE(status))
1399                         return -ENODEV;
1400         }
1401
1402         return 0;
1403 }
1404
1405 static const struct rfkill_ops acer_rfkill_ops = {
1406         .set_block = acer_rfkill_set,
1407 };
1408
1409 static struct rfkill *acer_rfkill_register(struct device *dev,
1410                                            enum rfkill_type type,
1411                                            char *name, u32 cap)
1412 {
1413         int err;
1414         struct rfkill *rfkill_dev;
1415         u32 state;
1416         acpi_status status;
1417
1418         rfkill_dev = rfkill_alloc(name, dev, type,
1419                                   &acer_rfkill_ops,
1420                                   (void *)(unsigned long)cap);
1421         if (!rfkill_dev)
1422                 return ERR_PTR(-ENOMEM);
1423
1424         status = get_u32(&state, cap);
1425
1426         err = rfkill_register(rfkill_dev);
1427         if (err) {
1428                 rfkill_destroy(rfkill_dev);
1429                 return ERR_PTR(err);
1430         }
1431
1432         if (ACPI_SUCCESS(status))
1433                 rfkill_set_sw_state(rfkill_dev, !state);
1434
1435         return rfkill_dev;
1436 }
1437
1438 static int acer_rfkill_init(struct device *dev)
1439 {
1440         int err;
1441
1442         if (has_cap(ACER_CAP_WIRELESS)) {
1443                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1444                         "acer-wireless", ACER_CAP_WIRELESS);
1445                 if (IS_ERR(wireless_rfkill)) {
1446                         err = PTR_ERR(wireless_rfkill);
1447                         goto error_wireless;
1448                 }
1449         }
1450
1451         if (has_cap(ACER_CAP_BLUETOOTH)) {
1452                 bluetooth_rfkill = acer_rfkill_register(dev,
1453                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1454                         ACER_CAP_BLUETOOTH);
1455                 if (IS_ERR(bluetooth_rfkill)) {
1456                         err = PTR_ERR(bluetooth_rfkill);
1457                         goto error_bluetooth;
1458                 }
1459         }
1460
1461         if (has_cap(ACER_CAP_THREEG)) {
1462                 threeg_rfkill = acer_rfkill_register(dev,
1463                         RFKILL_TYPE_WWAN, "acer-threeg",
1464                         ACER_CAP_THREEG);
1465                 if (IS_ERR(threeg_rfkill)) {
1466                         err = PTR_ERR(threeg_rfkill);
1467                         goto error_threeg;
1468                 }
1469         }
1470
1471         rfkill_inited = true;
1472
1473         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1474             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1475                 schedule_delayed_work(&acer_rfkill_work,
1476                         round_jiffies_relative(HZ));
1477
1478         return 0;
1479
1480 error_threeg:
1481         if (has_cap(ACER_CAP_BLUETOOTH)) {
1482                 rfkill_unregister(bluetooth_rfkill);
1483                 rfkill_destroy(bluetooth_rfkill);
1484         }
1485 error_bluetooth:
1486         if (has_cap(ACER_CAP_WIRELESS)) {
1487                 rfkill_unregister(wireless_rfkill);
1488                 rfkill_destroy(wireless_rfkill);
1489         }
1490 error_wireless:
1491         return err;
1492 }
1493
1494 static void acer_rfkill_exit(void)
1495 {
1496         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1497             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1498                 cancel_delayed_work_sync(&acer_rfkill_work);
1499
1500         if (has_cap(ACER_CAP_WIRELESS)) {
1501                 rfkill_unregister(wireless_rfkill);
1502                 rfkill_destroy(wireless_rfkill);
1503         }
1504
1505         if (has_cap(ACER_CAP_BLUETOOTH)) {
1506                 rfkill_unregister(bluetooth_rfkill);
1507                 rfkill_destroy(bluetooth_rfkill);
1508         }
1509
1510         if (has_cap(ACER_CAP_THREEG)) {
1511                 rfkill_unregister(threeg_rfkill);
1512                 rfkill_destroy(threeg_rfkill);
1513         }
1514         return;
1515 }
1516
1517 /*
1518  * sysfs interface
1519  */
1520 static ssize_t show_bool_threeg(struct device *dev,
1521         struct device_attribute *attr, char *buf)
1522 {
1523         u32 result; \
1524         acpi_status status;
1525
1526         pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
1527                 current->comm);
1528         status = get_u32(&result, ACER_CAP_THREEG);
1529         if (ACPI_SUCCESS(status))
1530                 return sprintf(buf, "%u\n", result);
1531         return sprintf(buf, "Read error\n");
1532 }
1533
1534 static ssize_t set_bool_threeg(struct device *dev,
1535         struct device_attribute *attr, const char *buf, size_t count)
1536 {
1537         u32 tmp = simple_strtoul(buf, NULL, 10);
1538         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1539         pr_info("This threeg sysfs will be removed in 2012 - used by: %s\n",
1540                 current->comm);
1541         if (ACPI_FAILURE(status))
1542                 return -EINVAL;
1543         return count;
1544 }
1545 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1546         set_bool_threeg);
1547
1548 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1549         char *buf)
1550 {
1551         pr_info("This interface sysfs will be removed in 2012 - used by: %s\n",
1552                 current->comm);
1553         switch (interface->type) {
1554         case ACER_AMW0:
1555                 return sprintf(buf, "AMW0\n");
1556         case ACER_AMW0_V2:
1557                 return sprintf(buf, "AMW0 v2\n");
1558         case ACER_WMID:
1559                 return sprintf(buf, "WMID\n");
1560         case ACER_WMID_v2:
1561                 return sprintf(buf, "WMID v2\n");
1562         default:
1563                 return sprintf(buf, "Error!\n");
1564         }
1565 }
1566
1567 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1568
1569 static void acer_wmi_notify(u32 value, void *context)
1570 {
1571         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1572         union acpi_object *obj;
1573         struct event_return_value return_value;
1574         acpi_status status;
1575         u16 device_state;
1576         const struct key_entry *key;
1577
1578         status = wmi_get_event_data(value, &response);
1579         if (status != AE_OK) {
1580                 pr_warn("bad event status 0x%x\n", status);
1581                 return;
1582         }
1583
1584         obj = (union acpi_object *)response.pointer;
1585
1586         if (!obj)
1587                 return;
1588         if (obj->type != ACPI_TYPE_BUFFER) {
1589                 pr_warn("Unknown response received %d\n", obj->type);
1590                 kfree(obj);
1591                 return;
1592         }
1593         if (obj->buffer.length != 8) {
1594                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1595                 kfree(obj);
1596                 return;
1597         }
1598
1599         return_value = *((struct event_return_value *)obj->buffer.pointer);
1600         kfree(obj);
1601
1602         switch (return_value.function) {
1603         case WMID_HOTKEY_EVENT:
1604                 device_state = return_value.device_state;
1605                 pr_debug("device state: 0x%x\n", device_state);
1606
1607                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1608                                                         return_value.key_num);
1609                 if (!key) {
1610                         pr_warn("Unknown key number - 0x%x\n",
1611                                 return_value.key_num);
1612                 } else {
1613                         switch (key->keycode) {
1614                         case KEY_WLAN:
1615                         case KEY_BLUETOOTH:
1616                                 if (has_cap(ACER_CAP_WIRELESS))
1617                                         rfkill_set_sw_state(wireless_rfkill,
1618                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1619                                 if (has_cap(ACER_CAP_THREEG))
1620                                         rfkill_set_sw_state(threeg_rfkill,
1621                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1622                                 if (has_cap(ACER_CAP_BLUETOOTH))
1623                                         rfkill_set_sw_state(bluetooth_rfkill,
1624                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1625                                 break;
1626                         }
1627                         sparse_keymap_report_entry(acer_wmi_input_dev, key,
1628                                                    1, true);
1629                 }
1630                 break;
1631         default:
1632                 pr_warn("Unknown function number - %d - %d\n",
1633                         return_value.function, return_value.key_num);
1634                 break;
1635         }
1636 }
1637
1638 static acpi_status
1639 wmid3_set_lm_mode(struct lm_input_params *params,
1640                   struct lm_return_value *return_value)
1641 {
1642         acpi_status status;
1643         union acpi_object *obj;
1644
1645         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1646         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1647
1648         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1649         if (ACPI_FAILURE(status))
1650                 return status;
1651
1652         obj = output.pointer;
1653
1654         if (!obj)
1655                 return AE_ERROR;
1656         else if (obj->type != ACPI_TYPE_BUFFER) {
1657                 kfree(obj);
1658                 return AE_ERROR;
1659         }
1660         if (obj->buffer.length != 4) {
1661                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1662                 kfree(obj);
1663                 return AE_ERROR;
1664         }
1665
1666         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1667         kfree(obj);
1668
1669         return status;
1670 }
1671
1672 static int acer_wmi_enable_ec_raw(void)
1673 {
1674         struct lm_return_value return_value;
1675         acpi_status status;
1676         struct lm_input_params params = {
1677                 .function_num = 0x1,
1678                 .commun_devices = 0xFFFF,
1679                 .devices = 0xFFFF,
1680                 .lm_status = 0x00,            /* Launch Manager Deactive */
1681         };
1682
1683         status = wmid3_set_lm_mode(&params, &return_value);
1684
1685         if (return_value.error_code || return_value.ec_return_value)
1686                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1687                         return_value.error_code,
1688                         return_value.ec_return_value);
1689         else
1690                 pr_info("Enabled EC raw mode\n");
1691
1692         return status;
1693 }
1694
1695 static int acer_wmi_enable_lm(void)
1696 {
1697         struct lm_return_value return_value;
1698         acpi_status status;
1699         struct lm_input_params params = {
1700                 .function_num = 0x1,
1701                 .commun_devices = 0xFFFF,
1702                 .devices = 0xFFFF,
1703                 .lm_status = 0x01,            /* Launch Manager Active */
1704         };
1705
1706         status = wmid3_set_lm_mode(&params, &return_value);
1707
1708         if (return_value.error_code || return_value.ec_return_value)
1709                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1710                         return_value.error_code,
1711                         return_value.ec_return_value);
1712
1713         return status;
1714 }
1715
1716 static int __init acer_wmi_input_setup(void)
1717 {
1718         acpi_status status;
1719         int err;
1720
1721         acer_wmi_input_dev = input_allocate_device();
1722         if (!acer_wmi_input_dev)
1723                 return -ENOMEM;
1724
1725         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1726         acer_wmi_input_dev->phys = "wmi/input0";
1727         acer_wmi_input_dev->id.bustype = BUS_HOST;
1728
1729         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1730         if (err)
1731                 goto err_free_dev;
1732
1733         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1734                                                 acer_wmi_notify, NULL);
1735         if (ACPI_FAILURE(status)) {
1736                 err = -EIO;
1737                 goto err_free_keymap;
1738         }
1739
1740         err = input_register_device(acer_wmi_input_dev);
1741         if (err)
1742                 goto err_uninstall_notifier;
1743
1744         return 0;
1745
1746 err_uninstall_notifier:
1747         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1748 err_free_keymap:
1749         sparse_keymap_free(acer_wmi_input_dev);
1750 err_free_dev:
1751         input_free_device(acer_wmi_input_dev);
1752         return err;
1753 }
1754
1755 static void acer_wmi_input_destroy(void)
1756 {
1757         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1758         sparse_keymap_free(acer_wmi_input_dev);
1759         input_unregister_device(acer_wmi_input_dev);
1760 }
1761
1762 /*
1763  * debugfs functions
1764  */
1765 static u32 get_wmid_devices(void)
1766 {
1767         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1768         union acpi_object *obj;
1769         acpi_status status;
1770         u32 devices = 0;
1771
1772         status = wmi_query_block(WMID_GUID2, 1, &out);
1773         if (ACPI_FAILURE(status))
1774                 return 0;
1775
1776         obj = (union acpi_object *) out.pointer;
1777         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1778                 (obj->buffer.length == sizeof(u32) ||
1779                 obj->buffer.length == sizeof(u64))) {
1780                 devices = *((u32 *) obj->buffer.pointer);
1781         } else if (obj->type == ACPI_TYPE_INTEGER) {
1782                 devices = (u32) obj->integer.value;
1783         }
1784
1785         kfree(out.pointer);
1786         return devices;
1787 }
1788
1789 /*
1790  * Platform device
1791  */
1792 static int __devinit acer_platform_probe(struct platform_device *device)
1793 {
1794         int err;
1795
1796         if (has_cap(ACER_CAP_MAILLED)) {
1797                 err = acer_led_init(&device->dev);
1798                 if (err)
1799                         goto error_mailled;
1800         }
1801
1802         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1803                 err = acer_backlight_init(&device->dev);
1804                 if (err)
1805                         goto error_brightness;
1806         }
1807
1808         err = acer_rfkill_init(&device->dev);
1809         if (err)
1810                 goto error_rfkill;
1811
1812         return err;
1813
1814 error_rfkill:
1815         if (has_cap(ACER_CAP_BRIGHTNESS))
1816                 acer_backlight_exit();
1817 error_brightness:
1818         if (has_cap(ACER_CAP_MAILLED))
1819                 acer_led_exit();
1820 error_mailled:
1821         return err;
1822 }
1823
1824 static int acer_platform_remove(struct platform_device *device)
1825 {
1826         if (has_cap(ACER_CAP_MAILLED))
1827                 acer_led_exit();
1828         if (has_cap(ACER_CAP_BRIGHTNESS))
1829                 acer_backlight_exit();
1830
1831         acer_rfkill_exit();
1832         return 0;
1833 }
1834
1835 static int acer_platform_suspend(struct platform_device *dev,
1836 pm_message_t state)
1837 {
1838         u32 value;
1839         struct acer_data *data = &interface->data;
1840
1841         if (!data)
1842                 return -ENOMEM;
1843
1844         if (has_cap(ACER_CAP_MAILLED)) {
1845                 get_u32(&value, ACER_CAP_MAILLED);
1846                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1847                 data->mailled = value;
1848         }
1849
1850         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1851                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1852                 data->brightness = value;
1853         }
1854
1855         return 0;
1856 }
1857
1858 static int acer_platform_resume(struct platform_device *device)
1859 {
1860         struct acer_data *data = &interface->data;
1861
1862         if (!data)
1863                 return -ENOMEM;
1864
1865         if (has_cap(ACER_CAP_MAILLED))
1866                 set_u32(data->mailled, ACER_CAP_MAILLED);
1867
1868         if (has_cap(ACER_CAP_BRIGHTNESS))
1869                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1870
1871         return 0;
1872 }
1873
1874 static void acer_platform_shutdown(struct platform_device *device)
1875 {
1876         struct acer_data *data = &interface->data;
1877
1878         if (!data)
1879                 return;
1880
1881         if (has_cap(ACER_CAP_MAILLED))
1882                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1883 }
1884
1885 static struct platform_driver acer_platform_driver = {
1886         .driver = {
1887                 .name = "acer-wmi",
1888                 .owner = THIS_MODULE,
1889         },
1890         .probe = acer_platform_probe,
1891         .remove = acer_platform_remove,
1892         .suspend = acer_platform_suspend,
1893         .resume = acer_platform_resume,
1894         .shutdown = acer_platform_shutdown,
1895 };
1896
1897 static struct platform_device *acer_platform_device;
1898
1899 static int remove_sysfs(struct platform_device *device)
1900 {
1901         if (has_cap(ACER_CAP_THREEG))
1902                 device_remove_file(&device->dev, &dev_attr_threeg);
1903
1904         device_remove_file(&device->dev, &dev_attr_interface);
1905
1906         return 0;
1907 }
1908
1909 static int create_sysfs(void)
1910 {
1911         int retval = -ENOMEM;
1912
1913         if (has_cap(ACER_CAP_THREEG)) {
1914                 retval = device_create_file(&acer_platform_device->dev,
1915                         &dev_attr_threeg);
1916                 if (retval)
1917                         goto error_sysfs;
1918         }
1919
1920         retval = device_create_file(&acer_platform_device->dev,
1921                 &dev_attr_interface);
1922         if (retval)
1923                 goto error_sysfs;
1924
1925         return 0;
1926
1927 error_sysfs:
1928                 remove_sysfs(acer_platform_device);
1929         return retval;
1930 }
1931
1932 static void remove_debugfs(void)
1933 {
1934         debugfs_remove(interface->debug.devices);
1935         debugfs_remove(interface->debug.root);
1936 }
1937
1938 static int create_debugfs(void)
1939 {
1940         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1941         if (!interface->debug.root) {
1942                 pr_err("Failed to create debugfs directory");
1943                 return -ENOMEM;
1944         }
1945
1946         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1947                                         interface->debug.root,
1948                                         &interface->debug.wmid_devices);
1949         if (!interface->debug.devices)
1950                 goto error_debugfs;
1951
1952         return 0;
1953
1954 error_debugfs:
1955         remove_debugfs();
1956         return -ENOMEM;
1957 }
1958
1959 static int __init acer_wmi_init(void)
1960 {
1961         int err;
1962
1963         pr_info("Acer Laptop ACPI-WMI Extras\n");
1964
1965         if (dmi_check_system(acer_blacklist)) {
1966                 pr_info("Blacklisted hardware detected - not loading\n");
1967                 return -ENODEV;
1968         }
1969
1970         find_quirks();
1971
1972         /*
1973          * Detect which ACPI-WMI interface we're using.
1974          */
1975         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1976                 interface = &AMW0_V2_interface;
1977
1978         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1979                 interface = &wmid_interface;
1980
1981         if (wmi_has_guid(WMID_GUID3))
1982                 interface = &wmid_v2_interface;
1983
1984         if (interface)
1985                 dmi_walk(type_aa_dmi_decode, NULL);
1986
1987         if (wmi_has_guid(WMID_GUID2) && interface) {
1988                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
1989                         pr_err("Unable to detect available WMID devices\n");
1990                         return -ENODEV;
1991                 }
1992                 /* WMID always provides brightness methods */
1993                 interface->capability |= ACER_CAP_BRIGHTNESS;
1994         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
1995                 pr_err("No WMID device detection method found\n");
1996                 return -ENODEV;
1997         }
1998
1999         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
2000                 interface = &AMW0_interface;
2001
2002                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
2003                         pr_err("Unable to detect available AMW0 devices\n");
2004                         return -ENODEV;
2005                 }
2006         }
2007
2008         if (wmi_has_guid(AMW0_GUID1))
2009                 AMW0_find_mailled();
2010
2011         if (!interface) {
2012                 pr_err("No or unsupported WMI interface, unable to load\n");
2013                 return -ENODEV;
2014         }
2015
2016         set_quirks();
2017
2018         if (acpi_video_backlight_support()) {
2019                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
2020                 pr_info("Brightness must be controlled by generic video driver\n");
2021         }
2022
2023         if (wmi_has_guid(WMID_GUID3)) {
2024                 if (ec_raw_mode) {
2025                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
2026                                 pr_err("Cannot enable EC raw mode\n");
2027                                 return -ENODEV;
2028                         }
2029                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
2030                         pr_err("Cannot enable Launch Manager mode\n");
2031                         return -ENODEV;
2032                 }
2033         } else if (ec_raw_mode) {
2034                 pr_info("No WMID EC raw mode enable method\n");
2035         }
2036
2037         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2038                 err = acer_wmi_input_setup();
2039                 if (err)
2040                         return err;
2041         }
2042
2043         err = platform_driver_register(&acer_platform_driver);
2044         if (err) {
2045                 pr_err("Unable to register platform driver\n");
2046                 goto error_platform_register;
2047         }
2048
2049         acer_platform_device = platform_device_alloc("acer-wmi", -1);
2050         if (!acer_platform_device) {
2051                 err = -ENOMEM;
2052                 goto error_device_alloc;
2053         }
2054
2055         err = platform_device_add(acer_platform_device);
2056         if (err)
2057                 goto error_device_add;
2058
2059         err = create_sysfs();
2060         if (err)
2061                 goto error_create_sys;
2062
2063         if (wmi_has_guid(WMID_GUID2)) {
2064                 interface->debug.wmid_devices = get_wmid_devices();
2065                 err = create_debugfs();
2066                 if (err)
2067                         goto error_create_debugfs;
2068         }
2069
2070         /* Override any initial settings with values from the commandline */
2071         acer_commandline_init();
2072
2073         return 0;
2074
2075 error_create_debugfs:
2076         remove_sysfs(acer_platform_device);
2077 error_create_sys:
2078         platform_device_del(acer_platform_device);
2079 error_device_add:
2080         platform_device_put(acer_platform_device);
2081 error_device_alloc:
2082         platform_driver_unregister(&acer_platform_driver);
2083 error_platform_register:
2084         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2085                 acer_wmi_input_destroy();
2086
2087         return err;
2088 }
2089
2090 static void __exit acer_wmi_exit(void)
2091 {
2092         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2093                 acer_wmi_input_destroy();
2094
2095         remove_sysfs(acer_platform_device);
2096         remove_debugfs();
2097         platform_device_unregister(acer_platform_device);
2098         platform_driver_unregister(&acer_platform_driver);
2099
2100         pr_info("Acer Laptop WMI Extras unloaded\n");
2101         return;
2102 }
2103
2104 module_init(acer_wmi_init);
2105 module_exit(acer_wmi_exit);