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, 0x43, {KEY_NEXTSONG} },
 112         {KE_IGNORE, 0x44, {KEY_PLAYPAUSE} },
 113         {KE_IGNORE, 0x45, {KEY_STOP} },
 114         {KE_IGNORE, 0x48, {KEY_VOLUMEUP} },
 115         {KE_IGNORE, 0x49, {KEY_VOLUMEDOWN} },
 116         {KE_IGNORE, 0x61, {KEY_SWITCHVIDEOMODE} },
 117         {KE_IGNORE, 0x62, {KEY_BRIGHTNESSUP} },
 118         {KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
 119         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
 120         {KE_IGNORE, 0x81, {KEY_SLEEP} },
 121         {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad On/Off */
 122         {KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
 123         {KE_END, 0}
 124 };
 125
 126 static struct input_dev *acer_wmi_input_dev;
 127
 128 struct event_return_value {
 129         u8 function;
 130         u8 key_num;
 131         u16 device_state;
 132         u32 reserved;
 133 } __attribute__((packed));
 134
 135 /*
 136  * GUID3 Get Device Status device flags
 137  */
 138 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
 139 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
 140 #define ACER_WMID3_GDS_WIMAX            (1<<7)  /* WiMAX */
 141 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
 142
 143 struct lm_input_params {
 144         u8 function_num;        /* Function Number */
 145         u16 commun_devices;     /* Communication type devices default status */
 146         u16 devices;            /* Other type devices default status */
 147         u8 lm_status;           /* Launch Manager Status */
 148         u16 reserved;
 149 } __attribute__((packed));
 150
 151 struct lm_return_value {
 152         u8 error_code;          /* Error Code */
 153         u8 ec_return_value;     /* EC Return Value */
 154         u16 reserved;
 155 } __attribute__((packed));
 156
 157 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
 158         u8 function_num;        /* Function Number */
 159         u8 hotkey_number;       /* Hotkey Number */
 160         u16 devices;            /* Get Device */
 161 } __attribute__((packed));
 162
 163 struct wmid3_gds_return_value { /* Get Device Status return value*/
 164         u8 error_code;          /* Error Code */
 165         u8 ec_return_value;     /* EC Return Value */
 166         u16 devices;            /* Current Device Status */
 167         u32 reserved;
 168 } __attribute__((packed));
 169
 170 struct hotkey_function_type_aa {
 171         u8 type;
 172         u8 length;
 173         u16 handle;
 174         u16 commun_func_bitmap;
 175 } __attribute__((packed));
 176
 177 /*
 178  * Interface capability flags
 179  */
 180 #define ACER_CAP_MAILLED                (1<<0)
 181 #define ACER_CAP_WIRELESS               (1<<1)
 182 #define ACER_CAP_BLUETOOTH              (1<<2)
 183 #define ACER_CAP_BRIGHTNESS             (1<<3)
 184 #define ACER_CAP_THREEG                 (1<<4)
 185 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 186
 187 /*
 188  * Interface type flags
 189  */
 190 enum interface_flags {
 191         ACER_AMW0,
 192         ACER_AMW0_V2,
 193         ACER_WMID,
 194         ACER_WMID_v2,
 195 };
 196
 197 #define ACER_DEFAULT_WIRELESS  0
 198 #define ACER_DEFAULT_BLUETOOTH 0
 199 #define ACER_DEFAULT_MAILLED   0
 200 #define ACER_DEFAULT_THREEG    0
 201
 202 static int max_brightness = 0xF;
 203
 204 static int mailled = -1;
 205 static int brightness = -1;
 206 static int threeg = -1;
 207 static int force_series;
 208 static bool ec_raw_mode;
 209 static bool has_type_aa;
 210 static u16 commun_func_bitmap;
 211
 212 module_param(mailled, int, 0444);
 213 module_param(brightness, int, 0444);
 214 module_param(threeg, int, 0444);
 215 module_param(force_series, int, 0444);
 216 module_param(ec_raw_mode, bool, 0444);
 217 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 218 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 219 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 220 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 221 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
 222
 223 struct acer_data {
 224         int mailled;
 225         int threeg;
 226         int brightness;
 227 };
 228
 229 struct acer_debug {
 230         struct dentry *root;
 231         struct dentry *devices;
 232         u32 wmid_devices;
 233 };
 234
 235 static struct rfkill *wireless_rfkill;
 236 static struct rfkill *bluetooth_rfkill;
 237 static struct rfkill *threeg_rfkill;
 238 static bool rfkill_inited;
 239
 240 /* Each low-level interface must define at least some of the following */
 241 struct wmi_interface {
 242         /* The WMI device type */
 243         u32 type;
 244
 245         /* The capabilities this interface provides */
 246         u32 capability;
 247
 248         /* Private data for the current interface */
 249         struct acer_data data;
 250
 251         /* debugfs entries associated with this interface */
 252         struct acer_debug debug;
 253 };
 254
 255 /* The static interface pointer, points to the currently detected interface */
 256 static struct wmi_interface *interface;
 257
 258 /*
 259  * Embedded Controller quirks
 260  * Some laptops require us to directly access the EC to either enable or query
 261  * features that are not available through WMI.
 262  */
 263
 264 struct quirk_entry {
 265         u8 wireless;
 266         u8 mailled;
 267         s8 brightness;
 268         u8 bluetooth;
 269 };
 270
 271 static struct quirk_entry *quirks;
 272
 273 static void set_quirks(void)
 274 {
 275         if (!interface)
 276                 return;
 277
 278         if (quirks->mailled)
 279                 interface->capability |= ACER_CAP_MAILLED;
 280
 281         if (quirks->brightness)
 282                 interface->capability |= ACER_CAP_BRIGHTNESS;
 283 }
 284
 285 static int dmi_matched(const struct dmi_system_id *dmi)
 286 {
 287         quirks = dmi->driver_data;
 288         return 1;
 289 }
 290
 291 static struct quirk_entry quirk_unknown = {
 292 };
 293
 294 static struct quirk_entry quirk_acer_aspire_1520 = {
 295         .brightness = -1,
 296 };
 297
 298 static struct quirk_entry quirk_acer_travelmate_2490 = {
 299         .mailled = 1,
 300 };
 301
 302 /* This AMW0 laptop has no bluetooth */
 303 static struct quirk_entry quirk_medion_md_98300 = {
 304         .wireless = 1,
 305 };
 306
 307 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 308         .wireless = 2,
 309 };
 310
 311 static struct quirk_entry quirk_lenovo_ideapad_s205 = {
 312         .wireless = 3,
 313 };
 314
 315 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 316 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 317         {
 318                 .ident = "Acer Aspire One (SSD)",
 319                 .matches = {
 320                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 321                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 322                 },
 323         },
 324         {
 325                 .ident = "Acer Aspire One (HDD)",
 326                 .matches = {
 327                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 328                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 329                 },
 330         },
 331         {}
 332 };
 333
 334 static struct dmi_system_id acer_quirks[] = {
 335         {
 336                 .callback = dmi_matched,
 337                 .ident = "Acer Aspire 1360",
 338                 .matches = {
 339                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 340                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 341                 },
 342                 .driver_data = &quirk_acer_aspire_1520,
 343         },
 344         {
 345                 .callback = dmi_matched,
 346                 .ident = "Acer Aspire 1520",
 347                 .matches = {
 348                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 349                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 350                 },
 351                 .driver_data = &quirk_acer_aspire_1520,
 352         },
 353         {
 354                 .callback = dmi_matched,
 355                 .ident = "Acer Aspire 3100",
 356                 .matches = {
 357                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 358                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 359                 },
 360                 .driver_data = &quirk_acer_travelmate_2490,
 361         },
 362         {
 363                 .callback = dmi_matched,
 364                 .ident = "Acer Aspire 3610",
 365                 .matches = {
 366                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 367                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 368                 },
 369                 .driver_data = &quirk_acer_travelmate_2490,
 370         },
 371         {
 372                 .callback = dmi_matched,
 373                 .ident = "Acer Aspire 5100",
 374                 .matches = {
 375                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 376                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 377                 },
 378                 .driver_data = &quirk_acer_travelmate_2490,
 379         },
 380         {
 381                 .callback = dmi_matched,
 382                 .ident = "Acer Aspire 5610",
 383                 .matches = {
 384                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 385                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 386                 },
 387                 .driver_data = &quirk_acer_travelmate_2490,
 388         },
 389         {
 390                 .callback = dmi_matched,
 391                 .ident = "Acer Aspire 5630",
 392                 .matches = {
 393                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 394                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 395                 },
 396                 .driver_data = &quirk_acer_travelmate_2490,
 397         },
 398         {
 399                 .callback = dmi_matched,
 400                 .ident = "Acer Aspire 5650",
 401                 .matches = {
 402                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 403                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 404                 },
 405                 .driver_data = &quirk_acer_travelmate_2490,
 406         },
 407         {
 408                 .callback = dmi_matched,
 409                 .ident = "Acer Aspire 5680",
 410                 .matches = {
 411                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 412                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 413                 },
 414                 .driver_data = &quirk_acer_travelmate_2490,
 415         },
 416         {
 417                 .callback = dmi_matched,
 418                 .ident = "Acer Aspire 9110",
 419                 .matches = {
 420                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 421                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 422                 },
 423                 .driver_data = &quirk_acer_travelmate_2490,
 424         },
 425         {
 426                 .callback = dmi_matched,
 427                 .ident = "Acer TravelMate 2490",
 428                 .matches = {
 429                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 430                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 431                 },
 432                 .driver_data = &quirk_acer_travelmate_2490,
 433         },
 434         {
 435                 .callback = dmi_matched,
 436                 .ident = "Acer TravelMate 4200",
 437                 .matches = {
 438                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 439                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 440                 },
 441                 .driver_data = &quirk_acer_travelmate_2490,
 442         },
 443         {
 444                 .callback = dmi_matched,
 445                 .ident = "Fujitsu Siemens Amilo Li 1718",
 446                 .matches = {
 447                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 448                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 449                 },
 450                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 451         },
 452         {
 453                 .callback = dmi_matched,
 454                 .ident = "Medion MD 98300",
 455                 .matches = {
 456                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 457                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 458                 },
 459                 .driver_data = &quirk_medion_md_98300,
 460         },
 461         {
 462                 .callback = dmi_matched,
 463                 .ident = "Lenovo Ideapad S205",
 464                 .matches = {
 465                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 466                         DMI_MATCH(DMI_PRODUCT_NAME, "10382LG"),
 467                 },
 468                 .driver_data = &quirk_lenovo_ideapad_s205,
 469         },
 470         {
 471                 .callback = dmi_matched,
 472                 .ident = "Lenovo 3000 N200",
 473                 .matches = {
 474                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 475                         DMI_MATCH(DMI_PRODUCT_NAME, "0687A31"),
 476                 },
 477                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 478         },
 479         {}
 480 };
 481
 482 /* Find which quirks are needed for a particular vendor/ model pair */
 483 static void find_quirks(void)
 484 {
 485         if (!force_series) {
 486                 dmi_check_system(acer_quirks);
 487         } else if (force_series == 2490) {
 488                 quirks = &quirk_acer_travelmate_2490;
 489         }
 490
 491         if (quirks == NULL)
 492                 quirks = &quirk_unknown;
 493
 494         set_quirks();
 495 }
 496
 497 /*
 498  * General interface convenience methods
 499  */
 500
 501 static bool has_cap(u32 cap)
 502 {
 503         if ((interface->capability & cap) != 0)
 504                 return 1;
 505
 506         return 0;
 507 }
 508
 509 /*
 510  * AMW0 (V1) interface
 511  */
 512 struct wmab_args {
 513         u32 eax;
 514         u32 ebx;
 515         u32 ecx;
 516         u32 edx;
 517 };
 518
 519 struct wmab_ret {
 520         u32 eax;
 521         u32 ebx;
 522         u32 ecx;
 523         u32 edx;
 524         u32 eex;
 525 };
 526
 527 static acpi_status wmab_execute(struct wmab_args *regbuf,
 528 struct acpi_buffer *result)
 529 {
 530         struct acpi_buffer input;
 531         acpi_status status;
 532         input.length = sizeof(struct wmab_args);
 533         input.pointer = (u8 *)regbuf;
 534
 535         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 536
 537         return status;
 538 }
 539
 540 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 541 struct wmi_interface *iface)
 542 {
 543         int err;
 544         u8 result;
 545
 546         switch (cap) {
 547         case ACER_CAP_MAILLED:
 548                 switch (quirks->mailled) {
 549                 default:
 550                         err = ec_read(0xA, &result);
 551                         if (err)
 552                                 return AE_ERROR;
 553                         *value = (result >> 7) & 0x1;
 554                         return AE_OK;
 555                 }
 556                 break;
 557         case ACER_CAP_WIRELESS:
 558                 switch (quirks->wireless) {
 559                 case 1:
 560                         err = ec_read(0x7B, &result);
 561                         if (err)
 562                                 return AE_ERROR;
 563                         *value = result & 0x1;
 564                         return AE_OK;
 565                 case 2:
 566                         err = ec_read(0x71, &result);
 567                         if (err)
 568                                 return AE_ERROR;
 569                         *value = result & 0x1;
 570                         return AE_OK;
 571                 case 3:
 572                         err = ec_read(0x78, &result);
 573                         if (err)
 574                                 return AE_ERROR;
 575                         *value = result & 0x1;
 576                         return AE_OK;
 577                 default:
 578                         err = ec_read(0xA, &result);
 579                         if (err)
 580                                 return AE_ERROR;
 581                         *value = (result >> 2) & 0x1;
 582                         return AE_OK;
 583                 }
 584                 break;
 585         case ACER_CAP_BLUETOOTH:
 586                 switch (quirks->bluetooth) {
 587                 default:
 588                         err = ec_read(0xA, &result);
 589                         if (err)
 590                                 return AE_ERROR;
 591                         *value = (result >> 4) & 0x1;
 592                         return AE_OK;
 593                 }
 594                 break;
 595         case ACER_CAP_BRIGHTNESS:
 596                 switch (quirks->brightness) {
 597                 default:
 598                         err = ec_read(0x83, &result);
 599                         if (err)
 600                                 return AE_ERROR;
 601                         *value = result;
 602                         return AE_OK;
 603                 }
 604                 break;
 605         default:
 606                 return AE_ERROR;
 607         }
 608         return AE_OK;
 609 }
 610
 611 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 612 {
 613         struct wmab_args args;
 614
 615         args.eax = ACER_AMW0_WRITE;
 616         args.ebx = value ? (1<<8) : 0;
 617         args.ecx = args.edx = 0;
 618
 619         switch (cap) {
 620         case ACER_CAP_MAILLED:
 621                 if (value > 1)
 622                         return AE_BAD_PARAMETER;
 623                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 624                 break;
 625         case ACER_CAP_WIRELESS:
 626                 if (value > 1)
 627                         return AE_BAD_PARAMETER;
 628                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 629                 break;
 630         case ACER_CAP_BLUETOOTH:
 631                 if (value > 1)
 632                         return AE_BAD_PARAMETER;
 633                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 634                 break;
 635         case ACER_CAP_BRIGHTNESS:
 636                 if (value > max_brightness)
 637                         return AE_BAD_PARAMETER;
 638                 switch (quirks->brightness) {
 639                 default:
 640                         return ec_write(0x83, value);
 641                         break;
 642                 }
 643         default:
 644                 return AE_ERROR;
 645         }
 646
 647         /* Actually do the set */
 648         return wmab_execute(&args, NULL);
 649 }
 650
 651 static acpi_status AMW0_find_mailled(void)
 652 {
 653         struct wmab_args args;
 654         struct wmab_ret ret;
 655         acpi_status status = AE_OK;
 656         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 657         union acpi_object *obj;
 658
 659         args.eax = 0x86;
 660         args.ebx = args.ecx = args.edx = 0;
 661
 662         status = wmab_execute(&args, &out);
 663         if (ACPI_FAILURE(status))
 664                 return status;
 665
 666         obj = (union acpi_object *) out.pointer;
 667         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 668         obj->buffer.length == sizeof(struct wmab_ret)) {
 669                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 670         } else {
 671                 kfree(out.pointer);
 672                 return AE_ERROR;
 673         }
 674
 675         if (ret.eex & 0x1)
 676                 interface->capability |= ACER_CAP_MAILLED;
 677
 678         kfree(out.pointer);
 679
 680         return AE_OK;
 681 }
 682
 683 static int AMW0_set_cap_acpi_check_device_found;
 684
 685 static acpi_status AMW0_set_cap_acpi_check_device_cb(acpi_handle handle,
 686         u32 level, void *context, void **retval)
 687 {
 688         AMW0_set_cap_acpi_check_device_found = 1;
 689         return AE_OK;
 690 }
 691
 692 static const struct acpi_device_id norfkill_ids[] = {
 693         { "VPC2004", 0},
 694         { "IBM0068", 0},
 695         { "LEN0068", 0},
 696         { "SNY5001", 0},        /* sony-laptop in charge */
 697         { "", 0},
 698 };
 699
 700 static int AMW0_set_cap_acpi_check_device(void)
 701 {
 702         const struct acpi_device_id *id;
 703
 704         for (id = norfkill_ids; id->id[0]; id++)
 705                 acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
 706                                 NULL, NULL);
 707         return AMW0_set_cap_acpi_check_device_found;
 708 }
 709
 710 static acpi_status AMW0_set_capabilities(void)
 711 {
 712         struct wmab_args args;
 713         struct wmab_ret ret;
 714         acpi_status status;
 715         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 716         union acpi_object *obj;
 717
 718         /*
 719          * On laptops with this strange GUID (non Acer), normal probing doesn't
 720          * work.
 721          */
 722         if (wmi_has_guid(AMW0_GUID2)) {
 723                 if ((quirks != &quirk_unknown) ||
 724                     !AMW0_set_cap_acpi_check_device())
 725                         interface->capability |= ACER_CAP_WIRELESS;
 726                 return AE_OK;
 727         }
 728
 729         args.eax = ACER_AMW0_WRITE;
 730         args.ecx = args.edx = 0;
 731
 732         args.ebx = 0xa2 << 8;
 733         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 734
 735         status = wmab_execute(&args, &out);
 736         if (ACPI_FAILURE(status))
 737                 return status;
 738
 739         obj = out.pointer;
 740         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 741         obj->buffer.length == sizeof(struct wmab_ret)) {
 742                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 743         } else {
 744                 status = AE_ERROR;
 745                 goto out;
 746         }
 747
 748         if (ret.eax & 0x1)
 749                 interface->capability |= ACER_CAP_WIRELESS;
 750
 751         args.ebx = 2 << 8;
 752         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 753
 754         /*
 755          * It's ok to use existing buffer for next wmab_execute call.
 756          * But we need to kfree(out.pointer) if next wmab_execute fail.
 757          */
 758         status = wmab_execute(&args, &out);
 759         if (ACPI_FAILURE(status))
 760                 goto out;
 761
 762         obj = (union acpi_object *) out.pointer;
 763         if (obj && obj->type == ACPI_TYPE_BUFFER
 764         && obj->buffer.length == sizeof(struct wmab_ret)) {
 765                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 766         } else {
 767                 status = AE_ERROR;
 768                 goto out;
 769         }
 770
 771         if (ret.eax & 0x1)
 772                 interface->capability |= ACER_CAP_BLUETOOTH;
 773
 774         /*
 775          * This appears to be safe to enable, since all Wistron based laptops
 776          * appear to use the same EC register for brightness, even if they
 777          * differ for wireless, etc
 778          */
 779         if (quirks->brightness >= 0)
 780                 interface->capability |= ACER_CAP_BRIGHTNESS;
 781
 782         status = AE_OK;
 783 out:
 784         kfree(out.pointer);
 785         return status;
 786 }
 787
 788 static struct wmi_interface AMW0_interface = {
 789         .type = ACER_AMW0,
 790 };
 791
 792 static struct wmi_interface AMW0_V2_interface = {
 793         .type = ACER_AMW0_V2,
 794 };
 795
 796 /*
 797  * New interface (The WMID interface)
 798  */
 799 static acpi_status
 800 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 801 {
 802         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 803         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 804         union acpi_object *obj;
 805         u32 tmp;
 806         acpi_status status;
 807
 808         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 809
 810         if (ACPI_FAILURE(status))
 811                 return status;
 812
 813         obj = (union acpi_object *) result.pointer;
 814         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 815                 (obj->buffer.length == sizeof(u32) ||
 816                 obj->buffer.length == sizeof(u64))) {
 817                 tmp = *((u32 *) obj->buffer.pointer);
 818         } else if (obj->type == ACPI_TYPE_INTEGER) {
 819                 tmp = (u32) obj->integer.value;
 820         } else {
 821                 tmp = 0;
 822         }
 823
 824         if (out)
 825                 *out = tmp;
 826
 827         kfree(result.pointer);
 828
 829         return status;
 830 }
 831
 832 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 833 struct wmi_interface *iface)
 834 {
 835         acpi_status status;
 836         u8 tmp;
 837         u32 result, method_id = 0;
 838
 839         switch (cap) {
 840         case ACER_CAP_WIRELESS:
 841                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 842                 break;
 843         case ACER_CAP_BLUETOOTH:
 844                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 845                 break;
 846         case ACER_CAP_BRIGHTNESS:
 847                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 848                 break;
 849         case ACER_CAP_THREEG:
 850                 method_id = ACER_WMID_GET_THREEG_METHODID;
 851                 break;
 852         case ACER_CAP_MAILLED:
 853                 if (quirks->mailled == 1) {
 854                         ec_read(0x9f, &tmp);
 855                         *value = tmp & 0x1;
 856                         return 0;
 857                 }
 858         default:
 859                 return AE_ERROR;
 860         }
 861         status = WMI_execute_u32(method_id, 0, &result);
 862
 863         if (ACPI_SUCCESS(status))
 864                 *value = (u8)result;
 865
 866         return status;
 867 }
 868
 869 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 870 {
 871         u32 method_id = 0;
 872         char param;
 873
 874         switch (cap) {
 875         case ACER_CAP_BRIGHTNESS:
 876                 if (value > max_brightness)
 877                         return AE_BAD_PARAMETER;
 878                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 879                 break;
 880         case ACER_CAP_WIRELESS:
 881                 if (value > 1)
 882                         return AE_BAD_PARAMETER;
 883                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 884                 break;
 885         case ACER_CAP_BLUETOOTH:
 886                 if (value > 1)
 887                         return AE_BAD_PARAMETER;
 888                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 889                 break;
 890         case ACER_CAP_THREEG:
 891                 if (value > 1)
 892                         return AE_BAD_PARAMETER;
 893                 method_id = ACER_WMID_SET_THREEG_METHODID;
 894                 break;
 895         case ACER_CAP_MAILLED:
 896                 if (value > 1)
 897                         return AE_BAD_PARAMETER;
 898                 if (quirks->mailled == 1) {
 899                         param = value ? 0x92 : 0x93;
 900                         i8042_lock_chip();
 901                         i8042_command(&param, 0x1059);
 902                         i8042_unlock_chip();
 903                         return 0;
 904                 }
 905                 break;
 906         default:
 907                 return AE_ERROR;
 908         }
 909         return WMI_execute_u32(method_id, (u32)value, NULL);
 910 }
 911
 912 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
 913 {
 914         struct wmid3_gds_return_value return_value;
 915         acpi_status status;
 916         union acpi_object *obj;
 917         struct wmid3_gds_input_param params = {
 918                 .function_num = 0x1,
 919                 .hotkey_number = 0x01,
 920                 .devices = device,
 921         };
 922         struct acpi_buffer input = {
 923                 sizeof(struct wmid3_gds_input_param),
 924                 &params
 925         };
 926         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 927
 928         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 929         if (ACPI_FAILURE(status))
 930                 return status;
 931
 932         obj = output.pointer;
 933
 934         if (!obj)
 935                 return AE_ERROR;
 936         else if (obj->type != ACPI_TYPE_BUFFER) {
 937                 kfree(obj);
 938                 return AE_ERROR;
 939         }
 940         if (obj->buffer.length != 8) {
 941                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
 942                 kfree(obj);
 943                 return AE_ERROR;
 944         }
 945
 946         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
 947         kfree(obj);
 948
 949         if (return_value.error_code || return_value.ec_return_value)
 950                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
 951                         device,
 952                         return_value.error_code,
 953                         return_value.ec_return_value);
 954         else
 955                 *value = !!(return_value.devices & device);
 956
 957         return status;
 958 }
 959
 960 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
 961 {
 962         u16 device;
 963
 964         switch (cap) {
 965         case ACER_CAP_WIRELESS:
 966                 device = ACER_WMID3_GDS_WIRELESS;
 967                 break;
 968         case ACER_CAP_BLUETOOTH:
 969                 device = ACER_WMID3_GDS_BLUETOOTH;
 970                 break;
 971         case ACER_CAP_THREEG:
 972                 device = ACER_WMID3_GDS_THREEG;
 973                 break;
 974         default:
 975                 return AE_ERROR;
 976         }
 977         return wmid3_get_device_status(value, device);
 978 }
 979
 980 static acpi_status wmid3_set_device_status(u32 value, u16 device)
 981 {
 982         struct wmid3_gds_return_value return_value;
 983         acpi_status status;
 984         union acpi_object *obj;
 985         u16 devices;
 986         struct wmid3_gds_input_param params = {
 987                 .function_num = 0x1,
 988                 .hotkey_number = 0x01,
 989                 .devices = commun_func_bitmap,
 990         };
 991         struct acpi_buffer input = {
 992                 sizeof(struct wmid3_gds_input_param),
 993                 &params
 994         };
 995         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 996         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
 997
 998         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 999         if (ACPI_FAILURE(status))
1000                 return status;
1001
1002         obj = output.pointer;
1003
1004         if (!obj)
1005                 return AE_ERROR;
1006         else if (obj->type != ACPI_TYPE_BUFFER) {
1007                 kfree(obj);
1008                 return AE_ERROR;
1009         }
1010         if (obj->buffer.length != 8) {
1011                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1012                 kfree(obj);
1013                 return AE_ERROR;
1014         }
1015
1016         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1017         kfree(obj);
1018
1019         if (return_value.error_code || return_value.ec_return_value) {
1020                 pr_warning("Get Current Device Status failed: "
1021                         "0x%x - 0x%x\n", return_value.error_code,
1022                         return_value.ec_return_value);
1023                 return status;
1024         }
1025
1026         devices = return_value.devices;
1027         params.function_num = 0x2;
1028         params.hotkey_number = 0x01;
1029         params.devices = (value) ? (devices | device) : (devices & ~device);
1030
1031         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output2);
1032         if (ACPI_FAILURE(status))
1033                 return status;
1034
1035         obj = output2.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 != 4) {
1044                 pr_warning("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_warning("Set Device Status failed: "
1054                         "0x%x - 0x%x\n", return_value.error_code,
1055                         return_value.ec_return_value);
1056
1057         return status;
1058 }
1059
1060 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1061 {
1062         u16 device;
1063
1064         switch (cap) {
1065         case ACER_CAP_WIRELESS:
1066                 device = ACER_WMID3_GDS_WIRELESS;
1067                 break;
1068         case ACER_CAP_BLUETOOTH:
1069                 device = ACER_WMID3_GDS_BLUETOOTH;
1070                 break;
1071         case ACER_CAP_THREEG:
1072                 device = ACER_WMID3_GDS_THREEG;
1073                 break;
1074         default:
1075                 return AE_ERROR;
1076         }
1077         return wmid3_set_device_status(value, device);
1078 }
1079
1080 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
1081 {
1082         struct hotkey_function_type_aa *type_aa;
1083
1084         /* We are looking for OEM-specific Type AAh */
1085         if (header->type != 0xAA)
1086                 return;
1087
1088         has_type_aa = true;
1089         type_aa = (struct hotkey_function_type_aa *) header;
1090
1091         pr_info("Function bitmap for Communication Button: 0x%x\n",
1092                 type_aa->commun_func_bitmap);
1093         commun_func_bitmap = type_aa->commun_func_bitmap;
1094
1095         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1096                 interface->capability |= ACER_CAP_WIRELESS;
1097         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1098                 interface->capability |= ACER_CAP_THREEG;
1099         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1100                 interface->capability |= ACER_CAP_BLUETOOTH;
1101 }
1102
1103 static acpi_status WMID_set_capabilities(void)
1104 {
1105         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1106         union acpi_object *obj;
1107         acpi_status status;
1108         u32 devices;
1109
1110         status = wmi_query_block(WMID_GUID2, 1, &out);
1111         if (ACPI_FAILURE(status))
1112                 return status;
1113
1114         obj = (union acpi_object *) out.pointer;
1115         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1116                 (obj->buffer.length == sizeof(u32) ||
1117                 obj->buffer.length == sizeof(u64))) {
1118                 devices = *((u32 *) obj->buffer.pointer);
1119         } else if (obj->type == ACPI_TYPE_INTEGER) {
1120                 devices = (u32) obj->integer.value;
1121         } else {
1122                 kfree(out.pointer);
1123                 return AE_ERROR;
1124         }
1125
1126         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1127         if (devices & 0x07)
1128                 interface->capability |= ACER_CAP_WIRELESS;
1129         if (devices & 0x40)
1130                 interface->capability |= ACER_CAP_THREEG;
1131         if (devices & 0x10)
1132                 interface->capability |= ACER_CAP_BLUETOOTH;
1133
1134         if (!(devices & 0x20))
1135                 max_brightness = 0x9;
1136
1137         kfree(out.pointer);
1138         return status;
1139 }
1140
1141 static struct wmi_interface wmid_interface = {
1142         .type = ACER_WMID,
1143 };
1144
1145 static struct wmi_interface wmid_v2_interface = {
1146         .type = ACER_WMID_v2,
1147 };
1148
1149 /*
1150  * Generic Device (interface-independent)
1151  */
1152
1153 static acpi_status get_u32(u32 *value, u32 cap)
1154 {
1155         acpi_status status = AE_ERROR;
1156
1157         switch (interface->type) {
1158         case ACER_AMW0:
1159                 status = AMW0_get_u32(value, cap, interface);
1160                 break;
1161         case ACER_AMW0_V2:
1162                 if (cap == ACER_CAP_MAILLED) {
1163                         status = AMW0_get_u32(value, cap, interface);
1164                         break;
1165                 }
1166         case ACER_WMID:
1167                 status = WMID_get_u32(value, cap, interface);
1168                 break;
1169         case ACER_WMID_v2:
1170                 if (cap & (ACER_CAP_WIRELESS |
1171                            ACER_CAP_BLUETOOTH |
1172                            ACER_CAP_THREEG))
1173                         status = wmid_v2_get_u32(value, cap);
1174                 else if (wmi_has_guid(WMID_GUID2))
1175                         status = WMID_get_u32(value, cap, interface);
1176                 break;
1177         }
1178
1179         return status;
1180 }
1181
1182 static acpi_status set_u32(u32 value, u32 cap)
1183 {
1184         acpi_status status;
1185
1186         if (interface->capability & cap) {
1187                 switch (interface->type) {
1188                 case ACER_AMW0:
1189                         return AMW0_set_u32(value, cap, interface);
1190                 case ACER_AMW0_V2:
1191                         if (cap == ACER_CAP_MAILLED)
1192                                 return AMW0_set_u32(value, cap, interface);
1193
1194                         /*
1195                          * On some models, some WMID methods don't toggle
1196                          * properly. For those cases, we want to run the AMW0
1197                          * method afterwards to be certain we've really toggled
1198                          * the device state.
1199                          */
1200                         if (cap == ACER_CAP_WIRELESS ||
1201                                 cap == ACER_CAP_BLUETOOTH) {
1202                                 status = WMID_set_u32(value, cap, interface);
1203                                 if (ACPI_FAILURE(status))
1204                                         return status;
1205
1206                                 return AMW0_set_u32(value, cap, interface);
1207                         }
1208                 case ACER_WMID:
1209                         return WMID_set_u32(value, cap, interface);
1210                 case ACER_WMID_v2:
1211                         if (cap & (ACER_CAP_WIRELESS |
1212                                    ACER_CAP_BLUETOOTH |
1213                                    ACER_CAP_THREEG))
1214                                 return wmid_v2_set_u32(value, cap);
1215                         else if (wmi_has_guid(WMID_GUID2))
1216                                 return WMID_set_u32(value, cap, interface);
1217                 default:
1218                         return AE_BAD_PARAMETER;
1219                 }
1220         }
1221         return AE_BAD_PARAMETER;
1222 }
1223
1224 static void __init acer_commandline_init(void)
1225 {
1226         /*
1227          * These will all fail silently if the value given is invalid, or the
1228          * capability isn't available on the given interface
1229          */
1230         if (mailled >= 0)
1231                 set_u32(mailled, ACER_CAP_MAILLED);
1232         if (!has_type_aa && threeg >= 0)
1233                 set_u32(threeg, ACER_CAP_THREEG);
1234         if (brightness >= 0)
1235                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1236 }
1237
1238 /*
1239  * LED device (Mail LED only, no other LEDs known yet)
1240  */
1241 static void mail_led_set(struct led_classdev *led_cdev,
1242 enum led_brightness value)
1243 {
1244         set_u32(value, ACER_CAP_MAILLED);
1245 }
1246
1247 static struct led_classdev mail_led = {
1248         .name = "acer-wmi::mail",
1249         .brightness_set = mail_led_set,
1250 };
1251
1252 static int __devinit acer_led_init(struct device *dev)
1253 {
1254         return led_classdev_register(dev, &mail_led);
1255 }
1256
1257 static void acer_led_exit(void)
1258 {
1259         set_u32(LED_OFF, ACER_CAP_MAILLED);
1260         led_classdev_unregister(&mail_led);
1261 }
1262
1263 /*
1264  * Backlight device
1265  */
1266 static struct backlight_device *acer_backlight_device;
1267
1268 static int read_brightness(struct backlight_device *bd)
1269 {
1270         u32 value;
1271         get_u32(&value, ACER_CAP_BRIGHTNESS);
1272         return value;
1273 }
1274
1275 static int update_bl_status(struct backlight_device *bd)
1276 {
1277         int intensity = bd->props.brightness;
1278
1279         if (bd->props.power != FB_BLANK_UNBLANK)
1280                 intensity = 0;
1281         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1282                 intensity = 0;
1283
1284         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1285
1286         return 0;
1287 }
1288
1289 static const struct backlight_ops acer_bl_ops = {
1290         .get_brightness = read_brightness,
1291         .update_status = update_bl_status,
1292 };
1293
1294 static int __devinit acer_backlight_init(struct device *dev)
1295 {
1296         struct backlight_properties props;
1297         struct backlight_device *bd;
1298
1299         memset(&props, 0, sizeof(struct backlight_properties));
1300         props.type = BACKLIGHT_PLATFORM;
1301         props.max_brightness = max_brightness;
1302         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1303                                        &props);
1304         if (IS_ERR(bd)) {
1305                 pr_err("Could not register Acer backlight device\n");
1306                 acer_backlight_device = NULL;
1307                 return PTR_ERR(bd);
1308         }
1309
1310         acer_backlight_device = bd;
1311
1312         bd->props.power = FB_BLANK_UNBLANK;
1313         bd->props.brightness = read_brightness(bd);
1314         backlight_update_status(bd);
1315         return 0;
1316 }
1317
1318 static void acer_backlight_exit(void)
1319 {
1320         backlight_device_unregister(acer_backlight_device);
1321 }
1322
1323 /*
1324  * Rfkill devices
1325  */
1326 static void acer_rfkill_update(struct work_struct *ignored);
1327 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1328 static void acer_rfkill_update(struct work_struct *ignored)
1329 {
1330         u32 state;
1331         acpi_status status;
1332
1333         if (has_cap(ACER_CAP_WIRELESS)) {
1334                 status = get_u32(&state, ACER_CAP_WIRELESS);
1335                 if (ACPI_SUCCESS(status)) {
1336                         if (quirks->wireless == 3)
1337                                 rfkill_set_hw_state(wireless_rfkill, !state);
1338                         else
1339                                 rfkill_set_sw_state(wireless_rfkill, !state);
1340                 }
1341         }
1342
1343         if (has_cap(ACER_CAP_BLUETOOTH)) {
1344                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1345                 if (ACPI_SUCCESS(status))
1346                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1347         }
1348
1349         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1350                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1351                 if (ACPI_SUCCESS(status))
1352                         rfkill_set_sw_state(threeg_rfkill, !state);
1353         }
1354
1355         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1356 }
1357
1358 static int acer_rfkill_set(void *data, bool blocked)
1359 {
1360         acpi_status status;
1361         u32 cap = (unsigned long)data;
1362
1363         if (rfkill_inited) {
1364                 status = set_u32(!blocked, cap);
1365                 if (ACPI_FAILURE(status))
1366                         return -ENODEV;
1367         }
1368
1369         return 0;
1370 }
1371
1372 static const struct rfkill_ops acer_rfkill_ops = {
1373         .set_block = acer_rfkill_set,
1374 };
1375
1376 static struct rfkill *acer_rfkill_register(struct device *dev,
1377                                            enum rfkill_type type,
1378                                            char *name, u32 cap)
1379 {
1380         int err;
1381         struct rfkill *rfkill_dev;
1382         u32 state;
1383         acpi_status status;
1384
1385         rfkill_dev = rfkill_alloc(name, dev, type,
1386                                   &acer_rfkill_ops,
1387                                   (void *)(unsigned long)cap);
1388         if (!rfkill_dev)
1389                 return ERR_PTR(-ENOMEM);
1390
1391         status = get_u32(&state, cap);
1392
1393         err = rfkill_register(rfkill_dev);
1394         if (err) {
1395                 rfkill_destroy(rfkill_dev);
1396                 return ERR_PTR(err);
1397         }
1398
1399         if (ACPI_SUCCESS(status))
1400                 rfkill_set_sw_state(rfkill_dev, !state);
1401
1402         return rfkill_dev;
1403 }
1404
1405 static int acer_rfkill_init(struct device *dev)
1406 {
1407         int err;
1408
1409         if (has_cap(ACER_CAP_WIRELESS)) {
1410                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1411                         "acer-wireless", ACER_CAP_WIRELESS);
1412                 if (IS_ERR(wireless_rfkill)) {
1413                         err = PTR_ERR(wireless_rfkill);
1414                         goto error_wireless;
1415                 }
1416         }
1417
1418         if (has_cap(ACER_CAP_BLUETOOTH)) {
1419                 bluetooth_rfkill = acer_rfkill_register(dev,
1420                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1421                         ACER_CAP_BLUETOOTH);
1422                 if (IS_ERR(bluetooth_rfkill)) {
1423                         err = PTR_ERR(bluetooth_rfkill);
1424                         goto error_bluetooth;
1425                 }
1426         }
1427
1428         if (has_cap(ACER_CAP_THREEG)) {
1429                 threeg_rfkill = acer_rfkill_register(dev,
1430                         RFKILL_TYPE_WWAN, "acer-threeg",
1431                         ACER_CAP_THREEG);
1432                 if (IS_ERR(threeg_rfkill)) {
1433                         err = PTR_ERR(threeg_rfkill);
1434                         goto error_threeg;
1435                 }
1436         }
1437
1438         rfkill_inited = true;
1439
1440         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1441             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1442                 schedule_delayed_work(&acer_rfkill_work,
1443                         round_jiffies_relative(HZ));
1444
1445         return 0;
1446
1447 error_threeg:
1448         if (has_cap(ACER_CAP_BLUETOOTH)) {
1449                 rfkill_unregister(bluetooth_rfkill);
1450                 rfkill_destroy(bluetooth_rfkill);
1451         }
1452 error_bluetooth:
1453         if (has_cap(ACER_CAP_WIRELESS)) {
1454                 rfkill_unregister(wireless_rfkill);
1455                 rfkill_destroy(wireless_rfkill);
1456         }
1457 error_wireless:
1458         return err;
1459 }
1460
1461 static void acer_rfkill_exit(void)
1462 {
1463         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1464             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1465                 cancel_delayed_work_sync(&acer_rfkill_work);
1466
1467         if (has_cap(ACER_CAP_WIRELESS)) {
1468                 rfkill_unregister(wireless_rfkill);
1469                 rfkill_destroy(wireless_rfkill);
1470         }
1471
1472         if (has_cap(ACER_CAP_BLUETOOTH)) {
1473                 rfkill_unregister(bluetooth_rfkill);
1474                 rfkill_destroy(bluetooth_rfkill);
1475         }
1476
1477         if (has_cap(ACER_CAP_THREEG)) {
1478                 rfkill_unregister(threeg_rfkill);
1479                 rfkill_destroy(threeg_rfkill);
1480         }
1481         return;
1482 }
1483
1484 /*
1485  * sysfs interface
1486  */
1487 static ssize_t show_bool_threeg(struct device *dev,
1488         struct device_attribute *attr, char *buf)
1489 {
1490         u32 result; \
1491         acpi_status status;
1492
1493         pr_info("This threeg sysfs will be removed in 2012"
1494                 " - used by: %s\n", current->comm);
1495         status = get_u32(&result, ACER_CAP_THREEG);
1496         if (ACPI_SUCCESS(status))
1497                 return sprintf(buf, "%u\n", result);
1498         return sprintf(buf, "Read error\n");
1499 }
1500
1501 static ssize_t set_bool_threeg(struct device *dev,
1502         struct device_attribute *attr, const char *buf, size_t count)
1503 {
1504         u32 tmp = simple_strtoul(buf, NULL, 10);
1505         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1506         pr_info("This threeg sysfs will be removed in 2012"
1507                 " - used by: %s\n", current->comm);
1508         if (ACPI_FAILURE(status))
1509                 return -EINVAL;
1510         return count;
1511 }
1512 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1513         set_bool_threeg);
1514
1515 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1516         char *buf)
1517 {
1518         pr_info("This interface sysfs will be removed in 2012"
1519                 " - used by: %s\n", current->comm);
1520         switch (interface->type) {
1521         case ACER_AMW0:
1522                 return sprintf(buf, "AMW0\n");
1523         case ACER_AMW0_V2:
1524                 return sprintf(buf, "AMW0 v2\n");
1525         case ACER_WMID:
1526                 return sprintf(buf, "WMID\n");
1527         case ACER_WMID_v2:
1528                 return sprintf(buf, "WMID v2\n");
1529         default:
1530                 return sprintf(buf, "Error!\n");
1531         }
1532 }
1533
1534 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1535
1536 static void acer_wmi_notify(u32 value, void *context)
1537 {
1538         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1539         union acpi_object *obj;
1540         struct event_return_value return_value;
1541         acpi_status status;
1542         u16 device_state;
1543         const struct key_entry *key;
1544
1545         status = wmi_get_event_data(value, &response);
1546         if (status != AE_OK) {
1547                 pr_warn("bad event status 0x%x\n", status);
1548                 return;
1549         }
1550
1551         obj = (union acpi_object *)response.pointer;
1552
1553         if (!obj)
1554                 return;
1555         if (obj->type != ACPI_TYPE_BUFFER) {
1556                 pr_warn("Unknown response received %d\n", obj->type);
1557                 kfree(obj);
1558                 return;
1559         }
1560         if (obj->buffer.length != 8) {
1561                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1562                 kfree(obj);
1563                 return;
1564         }
1565
1566         return_value = *((struct event_return_value *)obj->buffer.pointer);
1567         kfree(obj);
1568
1569         switch (return_value.function) {
1570         case WMID_HOTKEY_EVENT:
1571                 device_state = return_value.device_state;
1572                 pr_debug("device state: 0x%x\n", device_state);
1573
1574                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1575                                                         return_value.key_num);
1576                 if (!key) {
1577                         pr_warn("Unknown key number - 0x%x\n",
1578                                 return_value.key_num);
1579                 } else {
1580                         switch (key->keycode) {
1581                         case KEY_WLAN:
1582                         case KEY_BLUETOOTH:
1583                                 if (has_cap(ACER_CAP_WIRELESS))
1584                                         rfkill_set_sw_state(wireless_rfkill,
1585                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1586                                 if (has_cap(ACER_CAP_THREEG))
1587                                         rfkill_set_sw_state(threeg_rfkill,
1588                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1589                                 if (has_cap(ACER_CAP_BLUETOOTH))
1590                                         rfkill_set_sw_state(bluetooth_rfkill,
1591                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1592                                 break;
1593                         }
1594                         sparse_keymap_report_entry(acer_wmi_input_dev, key,
1595                                                    1, true);
1596                 }
1597                 break;
1598         default:
1599                 pr_warn("Unknown function number - %d - %d\n",
1600                         return_value.function, return_value.key_num);
1601                 break;
1602         }
1603 }
1604
1605 static acpi_status
1606 wmid3_set_lm_mode(struct lm_input_params *params,
1607                   struct lm_return_value *return_value)
1608 {
1609         acpi_status status;
1610         union acpi_object *obj;
1611
1612         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1613         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1614
1615         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1616         if (ACPI_FAILURE(status))
1617                 return status;
1618
1619         obj = output.pointer;
1620
1621         if (!obj)
1622                 return AE_ERROR;
1623         else if (obj->type != ACPI_TYPE_BUFFER) {
1624                 kfree(obj);
1625                 return AE_ERROR;
1626         }
1627         if (obj->buffer.length != 4) {
1628                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1629                 kfree(obj);
1630                 return AE_ERROR;
1631         }
1632
1633         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1634         kfree(obj);
1635
1636         return status;
1637 }
1638
1639 static int acer_wmi_enable_ec_raw(void)
1640 {
1641         struct lm_return_value return_value;
1642         acpi_status status;
1643         struct lm_input_params params = {
1644                 .function_num = 0x1,
1645                 .commun_devices = 0xFFFF,
1646                 .devices = 0xFFFF,
1647                 .lm_status = 0x00,            /* Launch Manager Deactive */
1648         };
1649
1650         status = wmid3_set_lm_mode(&params, &return_value);
1651
1652         if (return_value.error_code || return_value.ec_return_value)
1653                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1654                         return_value.error_code,
1655                         return_value.ec_return_value);
1656         else
1657                 pr_info("Enabled EC raw mode\n");
1658
1659         return status;
1660 }
1661
1662 static int acer_wmi_enable_lm(void)
1663 {
1664         struct lm_return_value return_value;
1665         acpi_status status;
1666         struct lm_input_params params = {
1667                 .function_num = 0x1,
1668                 .commun_devices = 0xFFFF,
1669                 .devices = 0xFFFF,
1670                 .lm_status = 0x01,            /* Launch Manager Active */
1671         };
1672
1673         status = wmid3_set_lm_mode(&params, &return_value);
1674
1675         if (return_value.error_code || return_value.ec_return_value)
1676                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1677                         return_value.error_code,
1678                         return_value.ec_return_value);
1679
1680         return status;
1681 }
1682
1683 static int __init acer_wmi_input_setup(void)
1684 {
1685         acpi_status status;
1686         int err;
1687
1688         acer_wmi_input_dev = input_allocate_device();
1689         if (!acer_wmi_input_dev)
1690                 return -ENOMEM;
1691
1692         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1693         acer_wmi_input_dev->phys = "wmi/input0";
1694         acer_wmi_input_dev->id.bustype = BUS_HOST;
1695
1696         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1697         if (err)
1698                 goto err_free_dev;
1699
1700         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1701                                                 acer_wmi_notify, NULL);
1702         if (ACPI_FAILURE(status)) {
1703                 err = -EIO;
1704                 goto err_free_keymap;
1705         }
1706
1707         err = input_register_device(acer_wmi_input_dev);
1708         if (err)
1709                 goto err_uninstall_notifier;
1710
1711         return 0;
1712
1713 err_uninstall_notifier:
1714         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1715 err_free_keymap:
1716         sparse_keymap_free(acer_wmi_input_dev);
1717 err_free_dev:
1718         input_free_device(acer_wmi_input_dev);
1719         return err;
1720 }
1721
1722 static void acer_wmi_input_destroy(void)
1723 {
1724         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1725         sparse_keymap_free(acer_wmi_input_dev);
1726         input_unregister_device(acer_wmi_input_dev);
1727 }
1728
1729 /*
1730  * debugfs functions
1731  */
1732 static u32 get_wmid_devices(void)
1733 {
1734         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1735         union acpi_object *obj;
1736         acpi_status status;
1737         u32 devices = 0;
1738
1739         status = wmi_query_block(WMID_GUID2, 1, &out);
1740         if (ACPI_FAILURE(status))
1741                 return 0;
1742
1743         obj = (union acpi_object *) out.pointer;
1744         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1745                 (obj->buffer.length == sizeof(u32) ||
1746                 obj->buffer.length == sizeof(u64))) {
1747                 devices = *((u32 *) obj->buffer.pointer);
1748         } else if (obj->type == ACPI_TYPE_INTEGER) {
1749                 devices = (u32) obj->integer.value;
1750         }
1751
1752         kfree(out.pointer);
1753         return devices;
1754 }
1755
1756 /*
1757  * Platform device
1758  */
1759 static int __devinit acer_platform_probe(struct platform_device *device)
1760 {
1761         int err;
1762
1763         if (has_cap(ACER_CAP_MAILLED)) {
1764                 err = acer_led_init(&device->dev);
1765                 if (err)
1766                         goto error_mailled;
1767         }
1768
1769         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1770                 err = acer_backlight_init(&device->dev);
1771                 if (err)
1772                         goto error_brightness;
1773         }
1774
1775         err = acer_rfkill_init(&device->dev);
1776         if (err)
1777                 goto error_rfkill;
1778
1779         return err;
1780
1781 error_rfkill:
1782         if (has_cap(ACER_CAP_BRIGHTNESS))
1783                 acer_backlight_exit();
1784 error_brightness:
1785         if (has_cap(ACER_CAP_MAILLED))
1786                 acer_led_exit();
1787 error_mailled:
1788         return err;
1789 }
1790
1791 static int acer_platform_remove(struct platform_device *device)
1792 {
1793         if (has_cap(ACER_CAP_MAILLED))
1794                 acer_led_exit();
1795         if (has_cap(ACER_CAP_BRIGHTNESS))
1796                 acer_backlight_exit();
1797
1798         acer_rfkill_exit();
1799         return 0;
1800 }
1801
1802 static int acer_platform_suspend(struct platform_device *dev,
1803 pm_message_t state)
1804 {
1805         u32 value;
1806         struct acer_data *data = &interface->data;
1807
1808         if (!data)
1809                 return -ENOMEM;
1810
1811         if (has_cap(ACER_CAP_MAILLED)) {
1812                 get_u32(&value, ACER_CAP_MAILLED);
1813                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1814                 data->mailled = value;
1815         }
1816
1817         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1818                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1819                 data->brightness = value;
1820         }
1821
1822         return 0;
1823 }
1824
1825 static int acer_platform_resume(struct platform_device *device)
1826 {
1827         struct acer_data *data = &interface->data;
1828
1829         if (!data)
1830                 return -ENOMEM;
1831
1832         if (has_cap(ACER_CAP_MAILLED))
1833                 set_u32(data->mailled, ACER_CAP_MAILLED);
1834
1835         if (has_cap(ACER_CAP_BRIGHTNESS))
1836                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1837
1838         return 0;
1839 }
1840
1841 static void acer_platform_shutdown(struct platform_device *device)
1842 {
1843         struct acer_data *data = &interface->data;
1844
1845         if (!data)
1846                 return;
1847
1848         if (has_cap(ACER_CAP_MAILLED))
1849                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1850 }
1851
1852 static struct platform_driver acer_platform_driver = {
1853         .driver = {
1854                 .name = "acer-wmi",
1855                 .owner = THIS_MODULE,
1856         },
1857         .probe = acer_platform_probe,
1858         .remove = acer_platform_remove,
1859         .suspend = acer_platform_suspend,
1860         .resume = acer_platform_resume,
1861         .shutdown = acer_platform_shutdown,
1862 };
1863
1864 static struct platform_device *acer_platform_device;
1865
1866 static int remove_sysfs(struct platform_device *device)
1867 {
1868         if (has_cap(ACER_CAP_THREEG))
1869                 device_remove_file(&device->dev, &dev_attr_threeg);
1870
1871         device_remove_file(&device->dev, &dev_attr_interface);
1872
1873         return 0;
1874 }
1875
1876 static int create_sysfs(void)
1877 {
1878         int retval = -ENOMEM;
1879
1880         if (has_cap(ACER_CAP_THREEG)) {
1881                 retval = device_create_file(&acer_platform_device->dev,
1882                         &dev_attr_threeg);
1883                 if (retval)
1884                         goto error_sysfs;
1885         }
1886
1887         retval = device_create_file(&acer_platform_device->dev,
1888                 &dev_attr_interface);
1889         if (retval)
1890                 goto error_sysfs;
1891
1892         return 0;
1893
1894 error_sysfs:
1895                 remove_sysfs(acer_platform_device);
1896         return retval;
1897 }
1898
1899 static void remove_debugfs(void)
1900 {
1901         debugfs_remove(interface->debug.devices);
1902         debugfs_remove(interface->debug.root);
1903 }
1904
1905 static int create_debugfs(void)
1906 {
1907         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1908         if (!interface->debug.root) {
1909                 pr_err("Failed to create debugfs directory");
1910                 return -ENOMEM;
1911         }
1912
1913         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1914                                         interface->debug.root,
1915                                         &interface->debug.wmid_devices);
1916         if (!interface->debug.devices)
1917                 goto error_debugfs;
1918
1919         return 0;
1920
1921 error_debugfs:
1922         remove_debugfs();
1923         return -ENOMEM;
1924 }
1925
1926 static int __init acer_wmi_init(void)
1927 {
1928         int err;
1929
1930         pr_info("Acer Laptop ACPI-WMI Extras\n");
1931
1932         if (dmi_check_system(acer_blacklist)) {
1933                 pr_info("Blacklisted hardware detected - not loading\n");
1934                 return -ENODEV;
1935         }
1936
1937         find_quirks();
1938
1939         /*
1940          * Detect which ACPI-WMI interface we're using.
1941          */
1942         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1943                 interface = &AMW0_V2_interface;
1944
1945         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1946                 interface = &wmid_interface;
1947
1948         if (wmi_has_guid(WMID_GUID3))
1949                 interface = &wmid_v2_interface;
1950
1951         if (interface)
1952                 dmi_walk(type_aa_dmi_decode, NULL);
1953
1954         if (wmi_has_guid(WMID_GUID2) && interface) {
1955                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
1956                         pr_err("Unable to detect available WMID devices\n");
1957                         return -ENODEV;
1958                 }
1959                 /* WMID always provides brightness methods */
1960                 interface->capability |= ACER_CAP_BRIGHTNESS;
1961         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
1962                 pr_err("No WMID device detection method found\n");
1963                 return -ENODEV;
1964         }
1965
1966         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1967                 interface = &AMW0_interface;
1968
1969                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1970                         pr_err("Unable to detect available AMW0 devices\n");
1971                         return -ENODEV;
1972                 }
1973         }
1974
1975         if (wmi_has_guid(AMW0_GUID1))
1976                 AMW0_find_mailled();
1977
1978         if (!interface) {
1979                 pr_err("No or unsupported WMI interface, unable to load\n");
1980                 return -ENODEV;
1981         }
1982
1983         set_quirks();
1984
1985         if (acpi_video_backlight_support()) {
1986                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1987                 pr_info("Brightness must be controlled by "
1988                        "generic video driver\n");
1989         }
1990
1991         if (wmi_has_guid(WMID_GUID3)) {
1992                 if (ec_raw_mode) {
1993                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1994                                 pr_err("Cannot enable EC raw mode\n");
1995                                 return -ENODEV;
1996                         }
1997                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1998                         pr_err("Cannot enable Launch Manager mode\n");
1999                         return -ENODEV;
2000                 }
2001         } else if (ec_raw_mode) {
2002                 pr_info("No WMID EC raw mode enable method\n");
2003         }
2004
2005         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2006                 err = acer_wmi_input_setup();
2007                 if (err)
2008                         return err;
2009         }
2010
2011         err = platform_driver_register(&acer_platform_driver);
2012         if (err) {
2013                 pr_err("Unable to register platform driver.\n");
2014                 goto error_platform_register;
2015         }
2016
2017         acer_platform_device = platform_device_alloc("acer-wmi", -1);
2018         if (!acer_platform_device) {
2019                 err = -ENOMEM;
2020                 goto error_device_alloc;
2021         }
2022
2023         err = platform_device_add(acer_platform_device);
2024         if (err)
2025                 goto error_device_add;
2026
2027         err = create_sysfs();
2028         if (err)
2029                 goto error_create_sys;
2030
2031         if (wmi_has_guid(WMID_GUID2)) {
2032                 interface->debug.wmid_devices = get_wmid_devices();
2033                 err = create_debugfs();
2034                 if (err)
2035                         goto error_create_debugfs;
2036         }
2037
2038         /* Override any initial settings with values from the commandline */
2039         acer_commandline_init();
2040
2041         return 0;
2042
2043 error_create_debugfs:
2044         remove_sysfs(acer_platform_device);
2045 error_create_sys:
2046         platform_device_del(acer_platform_device);
2047 error_device_add:
2048         platform_device_put(acer_platform_device);
2049 error_device_alloc:
2050         platform_driver_unregister(&acer_platform_driver);
2051 error_platform_register:
2052         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2053                 acer_wmi_input_destroy();
2054
2055         return err;
2056 }
2057
2058 static void __exit acer_wmi_exit(void)
2059 {
2060         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2061                 acer_wmi_input_destroy();
2062
2063         remove_sysfs(acer_platform_device);
2064         remove_debugfs();
2065         platform_device_unregister(acer_platform_device);
2066         platform_driver_unregister(&acer_platform_driver);
2067
2068         pr_info("Acer Laptop WMI Extras unloaded\n");
2069         return;
2070 }
2071
2072 module_init(acer_wmi_init);
2073 module_exit(acer_wmi_exit);