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         { "", 0},
 697 };
 698
 699 static int AMW0_set_cap_acpi_check_device(void)
 700 {
 701         const struct acpi_device_id *id;
 702
 703         for (id = norfkill_ids; id->id[0]; id++)
 704                 acpi_get_devices(id->id, AMW0_set_cap_acpi_check_device_cb,
 705                                 NULL, NULL);
 706         return AMW0_set_cap_acpi_check_device_found;
 707 }
 708
 709 static acpi_status AMW0_set_capabilities(void)
 710 {
 711         struct wmab_args args;
 712         struct wmab_ret ret;
 713         acpi_status status;
 714         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 715         union acpi_object *obj;
 716
 717         /*
 718          * On laptops with this strange GUID (non Acer), normal probing doesn't
 719          * work.
 720          */
 721         if (wmi_has_guid(AMW0_GUID2)) {
 722                 if ((quirks != &quirk_unknown) ||
 723                     !AMW0_set_cap_acpi_check_device())
 724                         interface->capability |= ACER_CAP_WIRELESS;
 725                 return AE_OK;
 726         }
 727
 728         args.eax = ACER_AMW0_WRITE;
 729         args.ecx = args.edx = 0;
 730
 731         args.ebx = 0xa2 << 8;
 732         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 733
 734         status = wmab_execute(&args, &out);
 735         if (ACPI_FAILURE(status))
 736                 return status;
 737
 738         obj = out.pointer;
 739         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 740         obj->buffer.length == sizeof(struct wmab_ret)) {
 741                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 742         } else {
 743                 status = AE_ERROR;
 744                 goto out;
 745         }
 746
 747         if (ret.eax & 0x1)
 748                 interface->capability |= ACER_CAP_WIRELESS;
 749
 750         args.ebx = 2 << 8;
 751         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 752
 753         /*
 754          * It's ok to use existing buffer for next wmab_execute call.
 755          * But we need to kfree(out.pointer) if next wmab_execute fail.
 756          */
 757         status = wmab_execute(&args, &out);
 758         if (ACPI_FAILURE(status))
 759                 goto out;
 760
 761         obj = (union acpi_object *) out.pointer;
 762         if (obj && obj->type == ACPI_TYPE_BUFFER
 763         && obj->buffer.length == sizeof(struct wmab_ret)) {
 764                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 765         } else {
 766                 status = AE_ERROR;
 767                 goto out;
 768         }
 769
 770         if (ret.eax & 0x1)
 771                 interface->capability |= ACER_CAP_BLUETOOTH;
 772
 773         /*
 774          * This appears to be safe to enable, since all Wistron based laptops
 775          * appear to use the same EC register for brightness, even if they
 776          * differ for wireless, etc
 777          */
 778         if (quirks->brightness >= 0)
 779                 interface->capability |= ACER_CAP_BRIGHTNESS;
 780
 781         status = AE_OK;
 782 out:
 783         kfree(out.pointer);
 784         return status;
 785 }
 786
 787 static struct wmi_interface AMW0_interface = {
 788         .type = ACER_AMW0,
 789 };
 790
 791 static struct wmi_interface AMW0_V2_interface = {
 792         .type = ACER_AMW0_V2,
 793 };
 794
 795 /*
 796  * New interface (The WMID interface)
 797  */
 798 static acpi_status
 799 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 800 {
 801         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 802         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 803         union acpi_object *obj;
 804         u32 tmp;
 805         acpi_status status;
 806
 807         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 808
 809         if (ACPI_FAILURE(status))
 810                 return status;
 811
 812         obj = (union acpi_object *) result.pointer;
 813         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 814                 (obj->buffer.length == sizeof(u32) ||
 815                 obj->buffer.length == sizeof(u64))) {
 816                 tmp = *((u32 *) obj->buffer.pointer);
 817         } else if (obj->type == ACPI_TYPE_INTEGER) {
 818                 tmp = (u32) obj->integer.value;
 819         } else {
 820                 tmp = 0;
 821         }
 822
 823         if (out)
 824                 *out = tmp;
 825
 826         kfree(result.pointer);
 827
 828         return status;
 829 }
 830
 831 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 832 struct wmi_interface *iface)
 833 {
 834         acpi_status status;
 835         u8 tmp;
 836         u32 result, method_id = 0;
 837
 838         switch (cap) {
 839         case ACER_CAP_WIRELESS:
 840                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 841                 break;
 842         case ACER_CAP_BLUETOOTH:
 843                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 844                 break;
 845         case ACER_CAP_BRIGHTNESS:
 846                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 847                 break;
 848         case ACER_CAP_THREEG:
 849                 method_id = ACER_WMID_GET_THREEG_METHODID;
 850                 break;
 851         case ACER_CAP_MAILLED:
 852                 if (quirks->mailled == 1) {
 853                         ec_read(0x9f, &tmp);
 854                         *value = tmp & 0x1;
 855                         return 0;
 856                 }
 857         default:
 858                 return AE_ERROR;
 859         }
 860         status = WMI_execute_u32(method_id, 0, &result);
 861
 862         if (ACPI_SUCCESS(status))
 863                 *value = (u8)result;
 864
 865         return status;
 866 }
 867
 868 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 869 {
 870         u32 method_id = 0;
 871         char param;
 872
 873         switch (cap) {
 874         case ACER_CAP_BRIGHTNESS:
 875                 if (value > max_brightness)
 876                         return AE_BAD_PARAMETER;
 877                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 878                 break;
 879         case ACER_CAP_WIRELESS:
 880                 if (value > 1)
 881                         return AE_BAD_PARAMETER;
 882                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 883                 break;
 884         case ACER_CAP_BLUETOOTH:
 885                 if (value > 1)
 886                         return AE_BAD_PARAMETER;
 887                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 888                 break;
 889         case ACER_CAP_THREEG:
 890                 if (value > 1)
 891                         return AE_BAD_PARAMETER;
 892                 method_id = ACER_WMID_SET_THREEG_METHODID;
 893                 break;
 894         case ACER_CAP_MAILLED:
 895                 if (value > 1)
 896                         return AE_BAD_PARAMETER;
 897                 if (quirks->mailled == 1) {
 898                         param = value ? 0x92 : 0x93;
 899                         i8042_lock_chip();
 900                         i8042_command(&param, 0x1059);
 901                         i8042_unlock_chip();
 902                         return 0;
 903                 }
 904                 break;
 905         default:
 906                 return AE_ERROR;
 907         }
 908         return WMI_execute_u32(method_id, (u32)value, NULL);
 909 }
 910
 911 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
 912 {
 913         struct wmid3_gds_return_value return_value;
 914         acpi_status status;
 915         union acpi_object *obj;
 916         struct wmid3_gds_input_param params = {
 917                 .function_num = 0x1,
 918                 .hotkey_number = 0x01,
 919                 .devices = device,
 920         };
 921         struct acpi_buffer input = {
 922                 sizeof(struct wmid3_gds_input_param),
 923                 &params
 924         };
 925         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 926
 927         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 928         if (ACPI_FAILURE(status))
 929                 return status;
 930
 931         obj = output.pointer;
 932
 933         if (!obj)
 934                 return AE_ERROR;
 935         else if (obj->type != ACPI_TYPE_BUFFER) {
 936                 kfree(obj);
 937                 return AE_ERROR;
 938         }
 939         if (obj->buffer.length != 8) {
 940                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
 941                 kfree(obj);
 942                 return AE_ERROR;
 943         }
 944
 945         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
 946         kfree(obj);
 947
 948         if (return_value.error_code || return_value.ec_return_value)
 949                 pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
 950                         device,
 951                         return_value.error_code,
 952                         return_value.ec_return_value);
 953         else
 954                 *value = !!(return_value.devices & device);
 955
 956         return status;
 957 }
 958
 959 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
 960 {
 961         u16 device;
 962
 963         switch (cap) {
 964         case ACER_CAP_WIRELESS:
 965                 device = ACER_WMID3_GDS_WIRELESS;
 966                 break;
 967         case ACER_CAP_BLUETOOTH:
 968                 device = ACER_WMID3_GDS_BLUETOOTH;
 969                 break;
 970         case ACER_CAP_THREEG:
 971                 device = ACER_WMID3_GDS_THREEG;
 972                 break;
 973         default:
 974                 return AE_ERROR;
 975         }
 976         return wmid3_get_device_status(value, device);
 977 }
 978
 979 static acpi_status wmid3_set_device_status(u32 value, u16 device)
 980 {
 981         struct wmid3_gds_return_value return_value;
 982         acpi_status status;
 983         union acpi_object *obj;
 984         u16 devices;
 985         struct wmid3_gds_input_param params = {
 986                 .function_num = 0x1,
 987                 .hotkey_number = 0x01,
 988                 .devices = commun_func_bitmap,
 989         };
 990         struct acpi_buffer input = {
 991                 sizeof(struct wmid3_gds_input_param),
 992                 &params
 993         };
 994         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 995         struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
 996
 997         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
 998         if (ACPI_FAILURE(status))
 999                 return status;
1000
1001         obj = output.pointer;
1002
1003         if (!obj)
1004                 return AE_ERROR;
1005         else if (obj->type != ACPI_TYPE_BUFFER) {
1006                 kfree(obj);
1007                 return AE_ERROR;
1008         }
1009         if (obj->buffer.length != 8) {
1010                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1011                 kfree(obj);
1012                 return AE_ERROR;
1013         }
1014
1015         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1016         kfree(obj);
1017
1018         if (return_value.error_code || return_value.ec_return_value) {
1019                 pr_warning("Get Current Device Status failed: "
1020                         "0x%x - 0x%x\n", return_value.error_code,
1021                         return_value.ec_return_value);
1022                 return status;
1023         }
1024
1025         devices = return_value.devices;
1026         params.function_num = 0x2;
1027         params.hotkey_number = 0x01;
1028         params.devices = (value) ? (devices | device) : (devices & ~device);
1029
1030         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output2);
1031         if (ACPI_FAILURE(status))
1032                 return status;
1033
1034         obj = output2.pointer;
1035
1036         if (!obj)
1037                 return AE_ERROR;
1038         else if (obj->type != ACPI_TYPE_BUFFER) {
1039                 kfree(obj);
1040                 return AE_ERROR;
1041         }
1042         if (obj->buffer.length != 4) {
1043                 pr_warning("Unknown buffer length %d\n", obj->buffer.length);
1044                 kfree(obj);
1045                 return AE_ERROR;
1046         }
1047
1048         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1049         kfree(obj);
1050
1051         if (return_value.error_code || return_value.ec_return_value)
1052                 pr_warning("Set Device Status failed: "
1053                         "0x%x - 0x%x\n", return_value.error_code,
1054                         return_value.ec_return_value);
1055
1056         return status;
1057 }
1058
1059 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1060 {
1061         u16 device;
1062
1063         switch (cap) {
1064         case ACER_CAP_WIRELESS:
1065                 device = ACER_WMID3_GDS_WIRELESS;
1066                 break;
1067         case ACER_CAP_BLUETOOTH:
1068                 device = ACER_WMID3_GDS_BLUETOOTH;
1069                 break;
1070         case ACER_CAP_THREEG:
1071                 device = ACER_WMID3_GDS_THREEG;
1072                 break;
1073         default:
1074                 return AE_ERROR;
1075         }
1076         return wmid3_set_device_status(value, device);
1077 }
1078
1079 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
1080 {
1081         struct hotkey_function_type_aa *type_aa;
1082
1083         /* We are looking for OEM-specific Type AAh */
1084         if (header->type != 0xAA)
1085                 return;
1086
1087         has_type_aa = true;
1088         type_aa = (struct hotkey_function_type_aa *) header;
1089
1090         pr_info("Function bitmap for Communication Button: 0x%x\n",
1091                 type_aa->commun_func_bitmap);
1092         commun_func_bitmap = type_aa->commun_func_bitmap;
1093
1094         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1095                 interface->capability |= ACER_CAP_WIRELESS;
1096         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1097                 interface->capability |= ACER_CAP_THREEG;
1098         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1099                 interface->capability |= ACER_CAP_BLUETOOTH;
1100 }
1101
1102 static acpi_status WMID_set_capabilities(void)
1103 {
1104         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1105         union acpi_object *obj;
1106         acpi_status status;
1107         u32 devices;
1108
1109         status = wmi_query_block(WMID_GUID2, 1, &out);
1110         if (ACPI_FAILURE(status))
1111                 return status;
1112
1113         obj = (union acpi_object *) out.pointer;
1114         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1115                 (obj->buffer.length == sizeof(u32) ||
1116                 obj->buffer.length == sizeof(u64))) {
1117                 devices = *((u32 *) obj->buffer.pointer);
1118         } else if (obj->type == ACPI_TYPE_INTEGER) {
1119                 devices = (u32) obj->integer.value;
1120         } else {
1121                 kfree(out.pointer);
1122                 return AE_ERROR;
1123         }
1124
1125         pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1126         if (devices & 0x07)
1127                 interface->capability |= ACER_CAP_WIRELESS;
1128         if (devices & 0x40)
1129                 interface->capability |= ACER_CAP_THREEG;
1130         if (devices & 0x10)
1131                 interface->capability |= ACER_CAP_BLUETOOTH;
1132
1133         if (!(devices & 0x20))
1134                 max_brightness = 0x9;
1135
1136         kfree(out.pointer);
1137         return status;
1138 }
1139
1140 static struct wmi_interface wmid_interface = {
1141         .type = ACER_WMID,
1142 };
1143
1144 static struct wmi_interface wmid_v2_interface = {
1145         .type = ACER_WMID_v2,
1146 };
1147
1148 /*
1149  * Generic Device (interface-independent)
1150  */
1151
1152 static acpi_status get_u32(u32 *value, u32 cap)
1153 {
1154         acpi_status status = AE_ERROR;
1155
1156         switch (interface->type) {
1157         case ACER_AMW0:
1158                 status = AMW0_get_u32(value, cap, interface);
1159                 break;
1160         case ACER_AMW0_V2:
1161                 if (cap == ACER_CAP_MAILLED) {
1162                         status = AMW0_get_u32(value, cap, interface);
1163                         break;
1164                 }
1165         case ACER_WMID:
1166                 status = WMID_get_u32(value, cap, interface);
1167                 break;
1168         case ACER_WMID_v2:
1169                 if (cap & (ACER_CAP_WIRELESS |
1170                            ACER_CAP_BLUETOOTH |
1171                            ACER_CAP_THREEG))
1172                         status = wmid_v2_get_u32(value, cap);
1173                 else if (wmi_has_guid(WMID_GUID2))
1174                         status = WMID_get_u32(value, cap, interface);
1175                 break;
1176         }
1177
1178         return status;
1179 }
1180
1181 static acpi_status set_u32(u32 value, u32 cap)
1182 {
1183         acpi_status status;
1184
1185         if (interface->capability & cap) {
1186                 switch (interface->type) {
1187                 case ACER_AMW0:
1188                         return AMW0_set_u32(value, cap, interface);
1189                 case ACER_AMW0_V2:
1190                         if (cap == ACER_CAP_MAILLED)
1191                                 return AMW0_set_u32(value, cap, interface);
1192
1193                         /*
1194                          * On some models, some WMID methods don't toggle
1195                          * properly. For those cases, we want to run the AMW0
1196                          * method afterwards to be certain we've really toggled
1197                          * the device state.
1198                          */
1199                         if (cap == ACER_CAP_WIRELESS ||
1200                                 cap == ACER_CAP_BLUETOOTH) {
1201                                 status = WMID_set_u32(value, cap, interface);
1202                                 if (ACPI_FAILURE(status))
1203                                         return status;
1204
1205                                 return AMW0_set_u32(value, cap, interface);
1206                         }
1207                 case ACER_WMID:
1208                         return WMID_set_u32(value, cap, interface);
1209                 case ACER_WMID_v2:
1210                         if (cap & (ACER_CAP_WIRELESS |
1211                                    ACER_CAP_BLUETOOTH |
1212                                    ACER_CAP_THREEG))
1213                                 return wmid_v2_set_u32(value, cap);
1214                         else if (wmi_has_guid(WMID_GUID2))
1215                                 return WMID_set_u32(value, cap, interface);
1216                 default:
1217                         return AE_BAD_PARAMETER;
1218                 }
1219         }
1220         return AE_BAD_PARAMETER;
1221 }
1222
1223 static void __init acer_commandline_init(void)
1224 {
1225         /*
1226          * These will all fail silently if the value given is invalid, or the
1227          * capability isn't available on the given interface
1228          */
1229         if (mailled >= 0)
1230                 set_u32(mailled, ACER_CAP_MAILLED);
1231         if (!has_type_aa && threeg >= 0)
1232                 set_u32(threeg, ACER_CAP_THREEG);
1233         if (brightness >= 0)
1234                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
1235 }
1236
1237 /*
1238  * LED device (Mail LED only, no other LEDs known yet)
1239  */
1240 static void mail_led_set(struct led_classdev *led_cdev,
1241 enum led_brightness value)
1242 {
1243         set_u32(value, ACER_CAP_MAILLED);
1244 }
1245
1246 static struct led_classdev mail_led = {
1247         .name = "acer-wmi::mail",
1248         .brightness_set = mail_led_set,
1249 };
1250
1251 static int __devinit acer_led_init(struct device *dev)
1252 {
1253         return led_classdev_register(dev, &mail_led);
1254 }
1255
1256 static void acer_led_exit(void)
1257 {
1258         set_u32(LED_OFF, ACER_CAP_MAILLED);
1259         led_classdev_unregister(&mail_led);
1260 }
1261
1262 /*
1263  * Backlight device
1264  */
1265 static struct backlight_device *acer_backlight_device;
1266
1267 static int read_brightness(struct backlight_device *bd)
1268 {
1269         u32 value;
1270         get_u32(&value, ACER_CAP_BRIGHTNESS);
1271         return value;
1272 }
1273
1274 static int update_bl_status(struct backlight_device *bd)
1275 {
1276         int intensity = bd->props.brightness;
1277
1278         if (bd->props.power != FB_BLANK_UNBLANK)
1279                 intensity = 0;
1280         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1281                 intensity = 0;
1282
1283         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1284
1285         return 0;
1286 }
1287
1288 static const struct backlight_ops acer_bl_ops = {
1289         .get_brightness = read_brightness,
1290         .update_status = update_bl_status,
1291 };
1292
1293 static int __devinit acer_backlight_init(struct device *dev)
1294 {
1295         struct backlight_properties props;
1296         struct backlight_device *bd;
1297
1298         memset(&props, 0, sizeof(struct backlight_properties));
1299         props.type = BACKLIGHT_PLATFORM;
1300         props.max_brightness = max_brightness;
1301         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1302                                        &props);
1303         if (IS_ERR(bd)) {
1304                 pr_err("Could not register Acer backlight device\n");
1305                 acer_backlight_device = NULL;
1306                 return PTR_ERR(bd);
1307         }
1308
1309         acer_backlight_device = bd;
1310
1311         bd->props.power = FB_BLANK_UNBLANK;
1312         bd->props.brightness = read_brightness(bd);
1313         backlight_update_status(bd);
1314         return 0;
1315 }
1316
1317 static void acer_backlight_exit(void)
1318 {
1319         backlight_device_unregister(acer_backlight_device);
1320 }
1321
1322 /*
1323  * Rfkill devices
1324  */
1325 static void acer_rfkill_update(struct work_struct *ignored);
1326 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1327 static void acer_rfkill_update(struct work_struct *ignored)
1328 {
1329         u32 state;
1330         acpi_status status;
1331
1332         if (has_cap(ACER_CAP_WIRELESS)) {
1333                 status = get_u32(&state, ACER_CAP_WIRELESS);
1334                 if (ACPI_SUCCESS(status)) {
1335                         if (quirks->wireless == 3)
1336                                 rfkill_set_hw_state(wireless_rfkill, !state);
1337                         else
1338                                 rfkill_set_sw_state(wireless_rfkill, !state);
1339                 }
1340         }
1341
1342         if (has_cap(ACER_CAP_BLUETOOTH)) {
1343                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1344                 if (ACPI_SUCCESS(status))
1345                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1346         }
1347
1348         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1349                 status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1350                 if (ACPI_SUCCESS(status))
1351                         rfkill_set_sw_state(threeg_rfkill, !state);
1352         }
1353
1354         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1355 }
1356
1357 static int acer_rfkill_set(void *data, bool blocked)
1358 {
1359         acpi_status status;
1360         u32 cap = (unsigned long)data;
1361
1362         if (rfkill_inited) {
1363                 status = set_u32(!blocked, cap);
1364                 if (ACPI_FAILURE(status))
1365                         return -ENODEV;
1366         }
1367
1368         return 0;
1369 }
1370
1371 static const struct rfkill_ops acer_rfkill_ops = {
1372         .set_block = acer_rfkill_set,
1373 };
1374
1375 static struct rfkill *acer_rfkill_register(struct device *dev,
1376                                            enum rfkill_type type,
1377                                            char *name, u32 cap)
1378 {
1379         int err;
1380         struct rfkill *rfkill_dev;
1381         u32 state;
1382         acpi_status status;
1383
1384         rfkill_dev = rfkill_alloc(name, dev, type,
1385                                   &acer_rfkill_ops,
1386                                   (void *)(unsigned long)cap);
1387         if (!rfkill_dev)
1388                 return ERR_PTR(-ENOMEM);
1389
1390         status = get_u32(&state, cap);
1391
1392         err = rfkill_register(rfkill_dev);
1393         if (err) {
1394                 rfkill_destroy(rfkill_dev);
1395                 return ERR_PTR(err);
1396         }
1397
1398         if (ACPI_SUCCESS(status))
1399                 rfkill_set_sw_state(rfkill_dev, !state);
1400
1401         return rfkill_dev;
1402 }
1403
1404 static int acer_rfkill_init(struct device *dev)
1405 {
1406         int err;
1407
1408         if (has_cap(ACER_CAP_WIRELESS)) {
1409                 wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1410                         "acer-wireless", ACER_CAP_WIRELESS);
1411                 if (IS_ERR(wireless_rfkill)) {
1412                         err = PTR_ERR(wireless_rfkill);
1413                         goto error_wireless;
1414                 }
1415         }
1416
1417         if (has_cap(ACER_CAP_BLUETOOTH)) {
1418                 bluetooth_rfkill = acer_rfkill_register(dev,
1419                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1420                         ACER_CAP_BLUETOOTH);
1421                 if (IS_ERR(bluetooth_rfkill)) {
1422                         err = PTR_ERR(bluetooth_rfkill);
1423                         goto error_bluetooth;
1424                 }
1425         }
1426
1427         if (has_cap(ACER_CAP_THREEG)) {
1428                 threeg_rfkill = acer_rfkill_register(dev,
1429                         RFKILL_TYPE_WWAN, "acer-threeg",
1430                         ACER_CAP_THREEG);
1431                 if (IS_ERR(threeg_rfkill)) {
1432                         err = PTR_ERR(threeg_rfkill);
1433                         goto error_threeg;
1434                 }
1435         }
1436
1437         rfkill_inited = true;
1438
1439         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1440             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1441                 schedule_delayed_work(&acer_rfkill_work,
1442                         round_jiffies_relative(HZ));
1443
1444         return 0;
1445
1446 error_threeg:
1447         if (has_cap(ACER_CAP_BLUETOOTH)) {
1448                 rfkill_unregister(bluetooth_rfkill);
1449                 rfkill_destroy(bluetooth_rfkill);
1450         }
1451 error_bluetooth:
1452         if (has_cap(ACER_CAP_WIRELESS)) {
1453                 rfkill_unregister(wireless_rfkill);
1454                 rfkill_destroy(wireless_rfkill);
1455         }
1456 error_wireless:
1457         return err;
1458 }
1459
1460 static void acer_rfkill_exit(void)
1461 {
1462         if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1463             has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1464                 cancel_delayed_work_sync(&acer_rfkill_work);
1465
1466         if (has_cap(ACER_CAP_WIRELESS)) {
1467                 rfkill_unregister(wireless_rfkill);
1468                 rfkill_destroy(wireless_rfkill);
1469         }
1470
1471         if (has_cap(ACER_CAP_BLUETOOTH)) {
1472                 rfkill_unregister(bluetooth_rfkill);
1473                 rfkill_destroy(bluetooth_rfkill);
1474         }
1475
1476         if (has_cap(ACER_CAP_THREEG)) {
1477                 rfkill_unregister(threeg_rfkill);
1478                 rfkill_destroy(threeg_rfkill);
1479         }
1480         return;
1481 }
1482
1483 /*
1484  * sysfs interface
1485  */
1486 static ssize_t show_bool_threeg(struct device *dev,
1487         struct device_attribute *attr, char *buf)
1488 {
1489         u32 result; \
1490         acpi_status status;
1491
1492         pr_info("This threeg sysfs will be removed in 2012"
1493                 " - used by: %s\n", current->comm);
1494         status = get_u32(&result, ACER_CAP_THREEG);
1495         if (ACPI_SUCCESS(status))
1496                 return sprintf(buf, "%u\n", result);
1497         return sprintf(buf, "Read error\n");
1498 }
1499
1500 static ssize_t set_bool_threeg(struct device *dev,
1501         struct device_attribute *attr, const char *buf, size_t count)
1502 {
1503         u32 tmp = simple_strtoul(buf, NULL, 10);
1504         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1505         pr_info("This threeg sysfs will be removed in 2012"
1506                 " - used by: %s\n", current->comm);
1507         if (ACPI_FAILURE(status))
1508                 return -EINVAL;
1509         return count;
1510 }
1511 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1512         set_bool_threeg);
1513
1514 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1515         char *buf)
1516 {
1517         pr_info("This interface sysfs will be removed in 2012"
1518                 " - used by: %s\n", current->comm);
1519         switch (interface->type) {
1520         case ACER_AMW0:
1521                 return sprintf(buf, "AMW0\n");
1522         case ACER_AMW0_V2:
1523                 return sprintf(buf, "AMW0 v2\n");
1524         case ACER_WMID:
1525                 return sprintf(buf, "WMID\n");
1526         case ACER_WMID_v2:
1527                 return sprintf(buf, "WMID v2\n");
1528         default:
1529                 return sprintf(buf, "Error!\n");
1530         }
1531 }
1532
1533 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1534
1535 static void acer_wmi_notify(u32 value, void *context)
1536 {
1537         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1538         union acpi_object *obj;
1539         struct event_return_value return_value;
1540         acpi_status status;
1541         u16 device_state;
1542         const struct key_entry *key;
1543
1544         status = wmi_get_event_data(value, &response);
1545         if (status != AE_OK) {
1546                 pr_warn("bad event status 0x%x\n", status);
1547                 return;
1548         }
1549
1550         obj = (union acpi_object *)response.pointer;
1551
1552         if (!obj)
1553                 return;
1554         if (obj->type != ACPI_TYPE_BUFFER) {
1555                 pr_warn("Unknown response received %d\n", obj->type);
1556                 kfree(obj);
1557                 return;
1558         }
1559         if (obj->buffer.length != 8) {
1560                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1561                 kfree(obj);
1562                 return;
1563         }
1564
1565         return_value = *((struct event_return_value *)obj->buffer.pointer);
1566         kfree(obj);
1567
1568         switch (return_value.function) {
1569         case WMID_HOTKEY_EVENT:
1570                 device_state = return_value.device_state;
1571                 pr_debug("device state: 0x%x\n", device_state);
1572
1573                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1574                                                         return_value.key_num);
1575                 if (!key) {
1576                         pr_warn("Unknown key number - 0x%x\n",
1577                                 return_value.key_num);
1578                 } else {
1579                         switch (key->keycode) {
1580                         case KEY_WLAN:
1581                         case KEY_BLUETOOTH:
1582                                 if (has_cap(ACER_CAP_WIRELESS))
1583                                         rfkill_set_sw_state(wireless_rfkill,
1584                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1585                                 if (has_cap(ACER_CAP_THREEG))
1586                                         rfkill_set_sw_state(threeg_rfkill,
1587                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1588                                 if (has_cap(ACER_CAP_BLUETOOTH))
1589                                         rfkill_set_sw_state(bluetooth_rfkill,
1590                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1591                                 break;
1592                         }
1593                         sparse_keymap_report_entry(acer_wmi_input_dev, key,
1594                                                    1, true);
1595                 }
1596                 break;
1597         default:
1598                 pr_warn("Unknown function number - %d - %d\n",
1599                         return_value.function, return_value.key_num);
1600                 break;
1601         }
1602 }
1603
1604 static acpi_status
1605 wmid3_set_lm_mode(struct lm_input_params *params,
1606                   struct lm_return_value *return_value)
1607 {
1608         acpi_status status;
1609         union acpi_object *obj;
1610
1611         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1612         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1613
1614         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1615         if (ACPI_FAILURE(status))
1616                 return status;
1617
1618         obj = output.pointer;
1619
1620         if (!obj)
1621                 return AE_ERROR;
1622         else if (obj->type != ACPI_TYPE_BUFFER) {
1623                 kfree(obj);
1624                 return AE_ERROR;
1625         }
1626         if (obj->buffer.length != 4) {
1627                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1628                 kfree(obj);
1629                 return AE_ERROR;
1630         }
1631
1632         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1633         kfree(obj);
1634
1635         return status;
1636 }
1637
1638 static int acer_wmi_enable_ec_raw(void)
1639 {
1640         struct lm_return_value return_value;
1641         acpi_status status;
1642         struct lm_input_params params = {
1643                 .function_num = 0x1,
1644                 .commun_devices = 0xFFFF,
1645                 .devices = 0xFFFF,
1646                 .lm_status = 0x00,            /* Launch Manager Deactive */
1647         };
1648
1649         status = wmid3_set_lm_mode(&params, &return_value);
1650
1651         if (return_value.error_code || return_value.ec_return_value)
1652                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1653                         return_value.error_code,
1654                         return_value.ec_return_value);
1655         else
1656                 pr_info("Enabled EC raw mode\n");
1657
1658         return status;
1659 }
1660
1661 static int acer_wmi_enable_lm(void)
1662 {
1663         struct lm_return_value return_value;
1664         acpi_status status;
1665         struct lm_input_params params = {
1666                 .function_num = 0x1,
1667                 .commun_devices = 0xFFFF,
1668                 .devices = 0xFFFF,
1669                 .lm_status = 0x01,            /* Launch Manager Active */
1670         };
1671
1672         status = wmid3_set_lm_mode(&params, &return_value);
1673
1674         if (return_value.error_code || return_value.ec_return_value)
1675                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1676                         return_value.error_code,
1677                         return_value.ec_return_value);
1678
1679         return status;
1680 }
1681
1682 static int __init acer_wmi_input_setup(void)
1683 {
1684         acpi_status status;
1685         int err;
1686
1687         acer_wmi_input_dev = input_allocate_device();
1688         if (!acer_wmi_input_dev)
1689                 return -ENOMEM;
1690
1691         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1692         acer_wmi_input_dev->phys = "wmi/input0";
1693         acer_wmi_input_dev->id.bustype = BUS_HOST;
1694
1695         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1696         if (err)
1697                 goto err_free_dev;
1698
1699         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1700                                                 acer_wmi_notify, NULL);
1701         if (ACPI_FAILURE(status)) {
1702                 err = -EIO;
1703                 goto err_free_keymap;
1704         }
1705
1706         err = input_register_device(acer_wmi_input_dev);
1707         if (err)
1708                 goto err_uninstall_notifier;
1709
1710         return 0;
1711
1712 err_uninstall_notifier:
1713         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1714 err_free_keymap:
1715         sparse_keymap_free(acer_wmi_input_dev);
1716 err_free_dev:
1717         input_free_device(acer_wmi_input_dev);
1718         return err;
1719 }
1720
1721 static void acer_wmi_input_destroy(void)
1722 {
1723         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1724         sparse_keymap_free(acer_wmi_input_dev);
1725         input_unregister_device(acer_wmi_input_dev);
1726 }
1727
1728 /*
1729  * debugfs functions
1730  */
1731 static u32 get_wmid_devices(void)
1732 {
1733         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1734         union acpi_object *obj;
1735         acpi_status status;
1736         u32 devices = 0;
1737
1738         status = wmi_query_block(WMID_GUID2, 1, &out);
1739         if (ACPI_FAILURE(status))
1740                 return 0;
1741
1742         obj = (union acpi_object *) out.pointer;
1743         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1744                 (obj->buffer.length == sizeof(u32) ||
1745                 obj->buffer.length == sizeof(u64))) {
1746                 devices = *((u32 *) obj->buffer.pointer);
1747         } else if (obj->type == ACPI_TYPE_INTEGER) {
1748                 devices = (u32) obj->integer.value;
1749         }
1750
1751         kfree(out.pointer);
1752         return devices;
1753 }
1754
1755 /*
1756  * Platform device
1757  */
1758 static int __devinit acer_platform_probe(struct platform_device *device)
1759 {
1760         int err;
1761
1762         if (has_cap(ACER_CAP_MAILLED)) {
1763                 err = acer_led_init(&device->dev);
1764                 if (err)
1765                         goto error_mailled;
1766         }
1767
1768         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1769                 err = acer_backlight_init(&device->dev);
1770                 if (err)
1771                         goto error_brightness;
1772         }
1773
1774         err = acer_rfkill_init(&device->dev);
1775         if (err)
1776                 goto error_rfkill;
1777
1778         return err;
1779
1780 error_rfkill:
1781         if (has_cap(ACER_CAP_BRIGHTNESS))
1782                 acer_backlight_exit();
1783 error_brightness:
1784         if (has_cap(ACER_CAP_MAILLED))
1785                 acer_led_exit();
1786 error_mailled:
1787         return err;
1788 }
1789
1790 static int acer_platform_remove(struct platform_device *device)
1791 {
1792         if (has_cap(ACER_CAP_MAILLED))
1793                 acer_led_exit();
1794         if (has_cap(ACER_CAP_BRIGHTNESS))
1795                 acer_backlight_exit();
1796
1797         acer_rfkill_exit();
1798         return 0;
1799 }
1800
1801 static int acer_platform_suspend(struct platform_device *dev,
1802 pm_message_t state)
1803 {
1804         u32 value;
1805         struct acer_data *data = &interface->data;
1806
1807         if (!data)
1808                 return -ENOMEM;
1809
1810         if (has_cap(ACER_CAP_MAILLED)) {
1811                 get_u32(&value, ACER_CAP_MAILLED);
1812                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1813                 data->mailled = value;
1814         }
1815
1816         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1817                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1818                 data->brightness = value;
1819         }
1820
1821         return 0;
1822 }
1823
1824 static int acer_platform_resume(struct platform_device *device)
1825 {
1826         struct acer_data *data = &interface->data;
1827
1828         if (!data)
1829                 return -ENOMEM;
1830
1831         if (has_cap(ACER_CAP_MAILLED))
1832                 set_u32(data->mailled, ACER_CAP_MAILLED);
1833
1834         if (has_cap(ACER_CAP_BRIGHTNESS))
1835                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1836
1837         return 0;
1838 }
1839
1840 static void acer_platform_shutdown(struct platform_device *device)
1841 {
1842         struct acer_data *data = &interface->data;
1843
1844         if (!data)
1845                 return;
1846
1847         if (has_cap(ACER_CAP_MAILLED))
1848                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1849 }
1850
1851 static struct platform_driver acer_platform_driver = {
1852         .driver = {
1853                 .name = "acer-wmi",
1854                 .owner = THIS_MODULE,
1855         },
1856         .probe = acer_platform_probe,
1857         .remove = acer_platform_remove,
1858         .suspend = acer_platform_suspend,
1859         .resume = acer_platform_resume,
1860         .shutdown = acer_platform_shutdown,
1861 };
1862
1863 static struct platform_device *acer_platform_device;
1864
1865 static int remove_sysfs(struct platform_device *device)
1866 {
1867         if (has_cap(ACER_CAP_THREEG))
1868                 device_remove_file(&device->dev, &dev_attr_threeg);
1869
1870         device_remove_file(&device->dev, &dev_attr_interface);
1871
1872         return 0;
1873 }
1874
1875 static int create_sysfs(void)
1876 {
1877         int retval = -ENOMEM;
1878
1879         if (has_cap(ACER_CAP_THREEG)) {
1880                 retval = device_create_file(&acer_platform_device->dev,
1881                         &dev_attr_threeg);
1882                 if (retval)
1883                         goto error_sysfs;
1884         }
1885
1886         retval = device_create_file(&acer_platform_device->dev,
1887                 &dev_attr_interface);
1888         if (retval)
1889                 goto error_sysfs;
1890
1891         return 0;
1892
1893 error_sysfs:
1894                 remove_sysfs(acer_platform_device);
1895         return retval;
1896 }
1897
1898 static void remove_debugfs(void)
1899 {
1900         debugfs_remove(interface->debug.devices);
1901         debugfs_remove(interface->debug.root);
1902 }
1903
1904 static int create_debugfs(void)
1905 {
1906         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1907         if (!interface->debug.root) {
1908                 pr_err("Failed to create debugfs directory");
1909                 return -ENOMEM;
1910         }
1911
1912         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1913                                         interface->debug.root,
1914                                         &interface->debug.wmid_devices);
1915         if (!interface->debug.devices)
1916                 goto error_debugfs;
1917
1918         return 0;
1919
1920 error_debugfs:
1921         remove_debugfs();
1922         return -ENOMEM;
1923 }
1924
1925 static int __init acer_wmi_init(void)
1926 {
1927         int err;
1928
1929         pr_info("Acer Laptop ACPI-WMI Extras\n");
1930
1931         if (dmi_check_system(acer_blacklist)) {
1932                 pr_info("Blacklisted hardware detected - not loading\n");
1933                 return -ENODEV;
1934         }
1935
1936         find_quirks();
1937
1938         /*
1939          * Detect which ACPI-WMI interface we're using.
1940          */
1941         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1942                 interface = &AMW0_V2_interface;
1943
1944         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1945                 interface = &wmid_interface;
1946
1947         if (wmi_has_guid(WMID_GUID3))
1948                 interface = &wmid_v2_interface;
1949
1950         if (interface)
1951                 dmi_walk(type_aa_dmi_decode, NULL);
1952
1953         if (wmi_has_guid(WMID_GUID2) && interface) {
1954                 if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
1955                         pr_err("Unable to detect available WMID devices\n");
1956                         return -ENODEV;
1957                 }
1958                 /* WMID always provides brightness methods */
1959                 interface->capability |= ACER_CAP_BRIGHTNESS;
1960         } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
1961                 pr_err("No WMID device detection method found\n");
1962                 return -ENODEV;
1963         }
1964
1965         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1966                 interface = &AMW0_interface;
1967
1968                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1969                         pr_err("Unable to detect available AMW0 devices\n");
1970                         return -ENODEV;
1971                 }
1972         }
1973
1974         if (wmi_has_guid(AMW0_GUID1))
1975                 AMW0_find_mailled();
1976
1977         if (!interface) {
1978                 pr_err("No or unsupported WMI interface, unable to load\n");
1979                 return -ENODEV;
1980         }
1981
1982         set_quirks();
1983
1984         if (acpi_video_backlight_support()) {
1985                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1986                 pr_info("Brightness must be controlled by "
1987                        "generic video driver\n");
1988         }
1989
1990         if (wmi_has_guid(WMID_GUID3)) {
1991                 if (ec_raw_mode) {
1992                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1993                                 pr_err("Cannot enable EC raw mode\n");
1994                                 return -ENODEV;
1995                         }
1996                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1997                         pr_err("Cannot enable Launch Manager mode\n");
1998                         return -ENODEV;
1999                 }
2000         } else if (ec_raw_mode) {
2001                 pr_info("No WMID EC raw mode enable method\n");
2002         }
2003
2004         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2005                 err = acer_wmi_input_setup();
2006                 if (err)
2007                         return err;
2008         }
2009
2010         err = platform_driver_register(&acer_platform_driver);
2011         if (err) {
2012                 pr_err("Unable to register platform driver.\n");
2013                 goto error_platform_register;
2014         }
2015
2016         acer_platform_device = platform_device_alloc("acer-wmi", -1);
2017         if (!acer_platform_device) {
2018                 err = -ENOMEM;
2019                 goto error_device_alloc;
2020         }
2021
2022         err = platform_device_add(acer_platform_device);
2023         if (err)
2024                 goto error_device_add;
2025
2026         err = create_sysfs();
2027         if (err)
2028                 goto error_create_sys;
2029
2030         if (wmi_has_guid(WMID_GUID2)) {
2031                 interface->debug.wmid_devices = get_wmid_devices();
2032                 err = create_debugfs();
2033                 if (err)
2034                         goto error_create_debugfs;
2035         }
2036
2037         /* Override any initial settings with values from the commandline */
2038         acer_commandline_init();
2039
2040         return 0;
2041
2042 error_create_debugfs:
2043         remove_sysfs(acer_platform_device);
2044 error_create_sys:
2045         platform_device_del(acer_platform_device);
2046 error_device_add:
2047         platform_device_put(acer_platform_device);
2048 error_device_alloc:
2049         platform_driver_unregister(&acer_platform_driver);
2050 error_platform_register:
2051         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2052                 acer_wmi_input_destroy();
2053
2054         return err;
2055 }
2056
2057 static void __exit acer_wmi_exit(void)
2058 {
2059         if (wmi_has_guid(ACERWMID_EVENT_GUID))
2060                 acer_wmi_input_destroy();
2061
2062         remove_sysfs(acer_platform_device);
2063         remove_debugfs();
2064         platform_device_unregister(acer_platform_device);
2065         platform_driver_unregister(&acer_platform_driver);
2066
2067         pr_info("Acer Laptop WMI Extras unloaded\n");
2068         return;
2069 }
2070
2071 module_init(acer_wmi_init);
2072 module_exit(acer_wmi_exit);