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 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/dmi.h>
  30 #include <linux/fb.h>
  31 #include <linux/backlight.h>
  32 #include <linux/leds.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/acpi.h>
  35 #include <linux/i8042.h>
  36 #include <linux/rfkill.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/debugfs.h>
  39 #include <linux/slab.h>
  40 #include <linux/input.h>
  41 #include <linux/input/sparse-keymap.h>
  42 #include <linux/dmi.h>
  43
  44 #include <acpi/acpi_drivers.h>
  45
  46 MODULE_AUTHOR("Carlos Corbacho");
  47 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  48 MODULE_LICENSE("GPL");
  49
  50 #define ACER_LOGPREFIX "acer-wmi: "
  51 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  52 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  53 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  54 #define ACER_WARNING KERN_WARNING ACER_LOGPREFIX
  55
  56 /*
  57  * Magic Number
  58  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  59  * (it's also used in acerhk when directly accessing the BIOS)
  60  */
  61 #define ACER_AMW0_WRITE 0x9610
  62
  63 /*
  64  * Bit masks for the AMW0 interface
  65  */
  66 #define ACER_AMW0_WIRELESS_MASK  0x35
  67 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  68 #define ACER_AMW0_MAILLED_MASK   0x31
  69
  70 /*
  71  * Method IDs for WMID interface
  72  */
  73 #define ACER_WMID_GET_WIRELESS_METHODID         1
  74 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  75 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  76 #define ACER_WMID_SET_WIRELESS_METHODID         4
  77 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  78 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  79 #define ACER_WMID_GET_THREEG_METHODID           10
  80 #define ACER_WMID_SET_THREEG_METHODID           11
  81
  82 /*
  83  * Acer ACPI method GUIDs
  84  */
  85 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  86 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  87 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
  88 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  89 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
  90
  91 /*
  92  * Acer ACPI event GUIDs
  93  */
  94 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
  95
  96 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  97 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  98 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
  99
 100 enum acer_wmi_event_ids {
 101         WMID_HOTKEY_EVENT = 0x1,
 102 };
 103
 104 static const struct key_entry acer_wmi_keymap[] = {
 105         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
 106         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
 107         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
 108         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
 109         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
 110         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
 111         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
 112         {KE_KEY, 0x82, {KEY_F22} },      /* Touch Pad On/Off */
 113         {KE_END, 0}
 114 };
 115
 116 static struct input_dev *acer_wmi_input_dev;
 117
 118 struct event_return_value {
 119         u8 function;
 120         u8 key_num;
 121         u16 device_state;
 122         u32 reserved;
 123 } __attribute__((packed));
 124
 125 /*
 126  * GUID3 Get Device Status device flags
 127  */
 128 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
 129 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
 130 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
 131
 132 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
 133         u8 function_num;        /* Function Number */
 134         u8 hotkey_number;       /* Hotkey Number */
 135         u16 devices;            /* Get Device */
 136 } __attribute__((packed));
 137
 138 struct wmid3_gds_return_value { /* Get Device Status return value*/
 139         u8 error_code;          /* Error Code */
 140         u8 ec_return_value;     /* EC Return Value */
 141         u16 devices;            /* Current Device Status */
 142         u32 reserved;
 143 } __attribute__((packed));
 144
 145 struct hotkey_function_type_aa {
 146         u8 type;
 147         u8 length;
 148         u16 handle;
 149         u16 commun_func_bitmap;
 150 } __attribute__((packed));
 151
 152 /*
 153  * Interface capability flags
 154  */
 155 #define ACER_CAP_MAILLED                (1<<0)
 156 #define ACER_CAP_WIRELESS               (1<<1)
 157 #define ACER_CAP_BLUETOOTH              (1<<2)
 158 #define ACER_CAP_BRIGHTNESS             (1<<3)
 159 #define ACER_CAP_THREEG                 (1<<4)
 160 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 161
 162 /*
 163  * Interface type flags
 164  */
 165 enum interface_flags {
 166         ACER_AMW0,
 167         ACER_AMW0_V2,
 168         ACER_WMID,
 169 };
 170
 171 #define ACER_DEFAULT_WIRELESS  0
 172 #define ACER_DEFAULT_BLUETOOTH 0
 173 #define ACER_DEFAULT_MAILLED   0
 174 #define ACER_DEFAULT_THREEG    0
 175
 176 static int max_brightness = 0xF;
 177
 178 static int mailled = -1;
 179 static int brightness = -1;
 180 static int threeg = -1;
 181 static int force_series;
 182 static bool has_type_aa;
 183
 184 module_param(mailled, int, 0444);
 185 module_param(brightness, int, 0444);
 186 module_param(threeg, int, 0444);
 187 module_param(force_series, int, 0444);
 188 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 189 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 190 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 191 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 192
 193 struct acer_data {
 194         int mailled;
 195         int threeg;
 196         int brightness;
 197 };
 198
 199 struct acer_debug {
 200         struct dentry *root;
 201         struct dentry *devices;
 202         u32 wmid_devices;
 203 };
 204
 205 static struct rfkill *wireless_rfkill;
 206 static struct rfkill *bluetooth_rfkill;
 207 static struct rfkill *threeg_rfkill;
 208
 209 /* Each low-level interface must define at least some of the following */
 210 struct wmi_interface {
 211         /* The WMI device type */
 212         u32 type;
 213
 214         /* The capabilities this interface provides */
 215         u32 capability;
 216
 217         /* Private data for the current interface */
 218         struct acer_data data;
 219
 220         /* debugfs entries associated with this interface */
 221         struct acer_debug debug;
 222 };
 223
 224 /* The static interface pointer, points to the currently detected interface */
 225 static struct wmi_interface *interface;
 226
 227 /*
 228  * Embedded Controller quirks
 229  * Some laptops require us to directly access the EC to either enable or query
 230  * features that are not available through WMI.
 231  */
 232
 233 struct quirk_entry {
 234         u8 wireless;
 235         u8 mailled;
 236         s8 brightness;
 237         u8 bluetooth;
 238 };
 239
 240 static struct quirk_entry *quirks;
 241
 242 static void set_quirks(void)
 243 {
 244         if (!interface)
 245                 return;
 246
 247         if (quirks->mailled)
 248                 interface->capability |= ACER_CAP_MAILLED;
 249
 250         if (quirks->brightness)
 251                 interface->capability |= ACER_CAP_BRIGHTNESS;
 252 }
 253
 254 static int dmi_matched(const struct dmi_system_id *dmi)
 255 {
 256         quirks = dmi->driver_data;
 257         return 1;
 258 }
 259
 260 static struct quirk_entry quirk_unknown = {
 261 };
 262
 263 static struct quirk_entry quirk_acer_aspire_1520 = {
 264         .brightness = -1,
 265 };
 266
 267 static struct quirk_entry quirk_acer_travelmate_2490 = {
 268         .mailled = 1,
 269 };
 270
 271 /* This AMW0 laptop has no bluetooth */
 272 static struct quirk_entry quirk_medion_md_98300 = {
 273         .wireless = 1,
 274 };
 275
 276 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 277         .wireless = 2,
 278 };
 279
 280 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 281 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 282         {
 283                 .ident = "Acer Aspire One (SSD)",
 284                 .matches = {
 285                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 286                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 287                 },
 288         },
 289         {
 290                 .ident = "Acer Aspire One (HDD)",
 291                 .matches = {
 292                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 293                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 294                 },
 295         },
 296         {}
 297 };
 298
 299 static struct dmi_system_id acer_quirks[] = {
 300         {
 301                 .callback = dmi_matched,
 302                 .ident = "Acer Aspire 1360",
 303                 .matches = {
 304                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 305                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 306                 },
 307                 .driver_data = &quirk_acer_aspire_1520,
 308         },
 309         {
 310                 .callback = dmi_matched,
 311                 .ident = "Acer Aspire 1520",
 312                 .matches = {
 313                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 314                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 315                 },
 316                 .driver_data = &quirk_acer_aspire_1520,
 317         },
 318         {
 319                 .callback = dmi_matched,
 320                 .ident = "Acer Aspire 3100",
 321                 .matches = {
 322                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 323                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 324                 },
 325                 .driver_data = &quirk_acer_travelmate_2490,
 326         },
 327         {
 328                 .callback = dmi_matched,
 329                 .ident = "Acer Aspire 3610",
 330                 .matches = {
 331                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 332                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 333                 },
 334                 .driver_data = &quirk_acer_travelmate_2490,
 335         },
 336         {
 337                 .callback = dmi_matched,
 338                 .ident = "Acer Aspire 5100",
 339                 .matches = {
 340                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 341                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 342                 },
 343                 .driver_data = &quirk_acer_travelmate_2490,
 344         },
 345         {
 346                 .callback = dmi_matched,
 347                 .ident = "Acer Aspire 5610",
 348                 .matches = {
 349                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 350                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 351                 },
 352                 .driver_data = &quirk_acer_travelmate_2490,
 353         },
 354         {
 355                 .callback = dmi_matched,
 356                 .ident = "Acer Aspire 5630",
 357                 .matches = {
 358                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 359                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 360                 },
 361                 .driver_data = &quirk_acer_travelmate_2490,
 362         },
 363         {
 364                 .callback = dmi_matched,
 365                 .ident = "Acer Aspire 5650",
 366                 .matches = {
 367                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 368                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 369                 },
 370                 .driver_data = &quirk_acer_travelmate_2490,
 371         },
 372         {
 373                 .callback = dmi_matched,
 374                 .ident = "Acer Aspire 5680",
 375                 .matches = {
 376                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 377                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 378                 },
 379                 .driver_data = &quirk_acer_travelmate_2490,
 380         },
 381         {
 382                 .callback = dmi_matched,
 383                 .ident = "Acer Aspire 9110",
 384                 .matches = {
 385                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 386                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 387                 },
 388                 .driver_data = &quirk_acer_travelmate_2490,
 389         },
 390         {
 391                 .callback = dmi_matched,
 392                 .ident = "Acer TravelMate 2490",
 393                 .matches = {
 394                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 395                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 396                 },
 397                 .driver_data = &quirk_acer_travelmate_2490,
 398         },
 399         {
 400                 .callback = dmi_matched,
 401                 .ident = "Acer TravelMate 4200",
 402                 .matches = {
 403                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 404                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 405                 },
 406                 .driver_data = &quirk_acer_travelmate_2490,
 407         },
 408         {
 409                 .callback = dmi_matched,
 410                 .ident = "Fujitsu Siemens Amilo Li 1718",
 411                 .matches = {
 412                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 413                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 414                 },
 415                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 416         },
 417         {
 418                 .callback = dmi_matched,
 419                 .ident = "Medion MD 98300",
 420                 .matches = {
 421                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 422                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 423                 },
 424                 .driver_data = &quirk_medion_md_98300,
 425         },
 426         {}
 427 };
 428
 429 /* Find which quirks are needed for a particular vendor/ model pair */
 430 static void find_quirks(void)
 431 {
 432         if (!force_series) {
 433                 dmi_check_system(acer_quirks);
 434         } else if (force_series == 2490) {
 435                 quirks = &quirk_acer_travelmate_2490;
 436         }
 437
 438         if (quirks == NULL)
 439                 quirks = &quirk_unknown;
 440
 441         set_quirks();
 442 }
 443
 444 /*
 445  * General interface convenience methods
 446  */
 447
 448 static bool has_cap(u32 cap)
 449 {
 450         if ((interface->capability & cap) != 0)
 451                 return 1;
 452
 453         return 0;
 454 }
 455
 456 /*
 457  * AMW0 (V1) interface
 458  */
 459 struct wmab_args {
 460         u32 eax;
 461         u32 ebx;
 462         u32 ecx;
 463         u32 edx;
 464 };
 465
 466 struct wmab_ret {
 467         u32 eax;
 468         u32 ebx;
 469         u32 ecx;
 470         u32 edx;
 471         u32 eex;
 472 };
 473
 474 static acpi_status wmab_execute(struct wmab_args *regbuf,
 475 struct acpi_buffer *result)
 476 {
 477         struct acpi_buffer input;
 478         acpi_status status;
 479         input.length = sizeof(struct wmab_args);
 480         input.pointer = (u8 *)regbuf;
 481
 482         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 483
 484         return status;
 485 }
 486
 487 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 488 struct wmi_interface *iface)
 489 {
 490         int err;
 491         u8 result;
 492
 493         switch (cap) {
 494         case ACER_CAP_MAILLED:
 495                 switch (quirks->mailled) {
 496                 default:
 497                         err = ec_read(0xA, &result);
 498                         if (err)
 499                                 return AE_ERROR;
 500                         *value = (result >> 7) & 0x1;
 501                         return AE_OK;
 502                 }
 503                 break;
 504         case ACER_CAP_WIRELESS:
 505                 switch (quirks->wireless) {
 506                 case 1:
 507                         err = ec_read(0x7B, &result);
 508                         if (err)
 509                                 return AE_ERROR;
 510                         *value = result & 0x1;
 511                         return AE_OK;
 512                 case 2:
 513                         err = ec_read(0x71, &result);
 514                         if (err)
 515                                 return AE_ERROR;
 516                         *value = result & 0x1;
 517                         return AE_OK;
 518                 default:
 519                         err = ec_read(0xA, &result);
 520                         if (err)
 521                                 return AE_ERROR;
 522                         *value = (result >> 2) & 0x1;
 523                         return AE_OK;
 524                 }
 525                 break;
 526         case ACER_CAP_BLUETOOTH:
 527                 switch (quirks->bluetooth) {
 528                 default:
 529                         err = ec_read(0xA, &result);
 530                         if (err)
 531                                 return AE_ERROR;
 532                         *value = (result >> 4) & 0x1;
 533                         return AE_OK;
 534                 }
 535                 break;
 536         case ACER_CAP_BRIGHTNESS:
 537                 switch (quirks->brightness) {
 538                 default:
 539                         err = ec_read(0x83, &result);
 540                         if (err)
 541                                 return AE_ERROR;
 542                         *value = result;
 543                         return AE_OK;
 544                 }
 545                 break;
 546         default:
 547                 return AE_ERROR;
 548         }
 549         return AE_OK;
 550 }
 551
 552 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 553 {
 554         struct wmab_args args;
 555
 556         args.eax = ACER_AMW0_WRITE;
 557         args.ebx = value ? (1<<8) : 0;
 558         args.ecx = args.edx = 0;
 559
 560         switch (cap) {
 561         case ACER_CAP_MAILLED:
 562                 if (value > 1)
 563                         return AE_BAD_PARAMETER;
 564                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 565                 break;
 566         case ACER_CAP_WIRELESS:
 567                 if (value > 1)
 568                         return AE_BAD_PARAMETER;
 569                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 570                 break;
 571         case ACER_CAP_BLUETOOTH:
 572                 if (value > 1)
 573                         return AE_BAD_PARAMETER;
 574                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 575                 break;
 576         case ACER_CAP_BRIGHTNESS:
 577                 if (value > max_brightness)
 578                         return AE_BAD_PARAMETER;
 579                 switch (quirks->brightness) {
 580                 default:
 581                         return ec_write(0x83, value);
 582                         break;
 583                 }
 584         default:
 585                 return AE_ERROR;
 586         }
 587
 588         /* Actually do the set */
 589         return wmab_execute(&args, NULL);
 590 }
 591
 592 static acpi_status AMW0_find_mailled(void)
 593 {
 594         struct wmab_args args;
 595         struct wmab_ret ret;
 596         acpi_status status = AE_OK;
 597         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 598         union acpi_object *obj;
 599
 600         args.eax = 0x86;
 601         args.ebx = args.ecx = args.edx = 0;
 602
 603         status = wmab_execute(&args, &out);
 604         if (ACPI_FAILURE(status))
 605                 return status;
 606
 607         obj = (union acpi_object *) out.pointer;
 608         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 609         obj->buffer.length == sizeof(struct wmab_ret)) {
 610                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 611         } else {
 612                 kfree(out.pointer);
 613                 return AE_ERROR;
 614         }
 615
 616         if (ret.eex & 0x1)
 617                 interface->capability |= ACER_CAP_MAILLED;
 618
 619         kfree(out.pointer);
 620
 621         return AE_OK;
 622 }
 623
 624 static acpi_status AMW0_set_capabilities(void)
 625 {
 626         struct wmab_args args;
 627         struct wmab_ret ret;
 628         acpi_status status;
 629         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 630         union acpi_object *obj;
 631
 632         /*
 633          * On laptops with this strange GUID (non Acer), normal probing doesn't
 634          * work.
 635          */
 636         if (wmi_has_guid(AMW0_GUID2)) {
 637                 interface->capability |= ACER_CAP_WIRELESS;
 638                 return AE_OK;
 639         }
 640
 641         args.eax = ACER_AMW0_WRITE;
 642         args.ecx = args.edx = 0;
 643
 644         args.ebx = 0xa2 << 8;
 645         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 646
 647         status = wmab_execute(&args, &out);
 648         if (ACPI_FAILURE(status))
 649                 return status;
 650
 651         obj = out.pointer;
 652         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 653         obj->buffer.length == sizeof(struct wmab_ret)) {
 654                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 655         } else {
 656                 status = AE_ERROR;
 657                 goto out;
 658         }
 659
 660         if (ret.eax & 0x1)
 661                 interface->capability |= ACER_CAP_WIRELESS;
 662
 663         args.ebx = 2 << 8;
 664         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 665
 666         /*
 667          * It's ok to use existing buffer for next wmab_execute call.
 668          * But we need to kfree(out.pointer) if next wmab_execute fail.
 669          */
 670         status = wmab_execute(&args, &out);
 671         if (ACPI_FAILURE(status))
 672                 goto out;
 673
 674         obj = (union acpi_object *) out.pointer;
 675         if (obj && obj->type == ACPI_TYPE_BUFFER
 676         && obj->buffer.length == sizeof(struct wmab_ret)) {
 677                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 678         } else {
 679                 status = AE_ERROR;
 680                 goto out;
 681         }
 682
 683         if (ret.eax & 0x1)
 684                 interface->capability |= ACER_CAP_BLUETOOTH;
 685
 686         /*
 687          * This appears to be safe to enable, since all Wistron based laptops
 688          * appear to use the same EC register for brightness, even if they
 689          * differ for wireless, etc
 690          */
 691         if (quirks->brightness >= 0)
 692                 interface->capability |= ACER_CAP_BRIGHTNESS;
 693
 694         status = AE_OK;
 695 out:
 696         kfree(out.pointer);
 697         return status;
 698 }
 699
 700 static struct wmi_interface AMW0_interface = {
 701         .type = ACER_AMW0,
 702 };
 703
 704 static struct wmi_interface AMW0_V2_interface = {
 705         .type = ACER_AMW0_V2,
 706 };
 707
 708 /*
 709  * New interface (The WMID interface)
 710  */
 711 static acpi_status
 712 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 713 {
 714         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 715         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 716         union acpi_object *obj;
 717         u32 tmp;
 718         acpi_status status;
 719
 720         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 721
 722         if (ACPI_FAILURE(status))
 723                 return status;
 724
 725         obj = (union acpi_object *) result.pointer;
 726         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 727                 obj->buffer.length == sizeof(u32)) {
 728                 tmp = *((u32 *) obj->buffer.pointer);
 729         } else {
 730                 tmp = 0;
 731         }
 732
 733         if (out)
 734                 *out = tmp;
 735
 736         kfree(result.pointer);
 737
 738         return status;
 739 }
 740
 741 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 742 struct wmi_interface *iface)
 743 {
 744         acpi_status status;
 745         u8 tmp;
 746         u32 result, method_id = 0;
 747
 748         switch (cap) {
 749         case ACER_CAP_WIRELESS:
 750                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 751                 break;
 752         case ACER_CAP_BLUETOOTH:
 753                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 754                 break;
 755         case ACER_CAP_BRIGHTNESS:
 756                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 757                 break;
 758         case ACER_CAP_THREEG:
 759                 method_id = ACER_WMID_GET_THREEG_METHODID;
 760                 break;
 761         case ACER_CAP_MAILLED:
 762                 if (quirks->mailled == 1) {
 763                         ec_read(0x9f, &tmp);
 764                         *value = tmp & 0x1;
 765                         return 0;
 766                 }
 767         default:
 768                 return AE_ERROR;
 769         }
 770         status = WMI_execute_u32(method_id, 0, &result);
 771
 772         if (ACPI_SUCCESS(status))
 773                 *value = (u8)result;
 774
 775         return status;
 776 }
 777
 778 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 779 {
 780         u32 method_id = 0;
 781         char param;
 782
 783         switch (cap) {
 784         case ACER_CAP_BRIGHTNESS:
 785                 if (value > max_brightness)
 786                         return AE_BAD_PARAMETER;
 787                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 788                 break;
 789         case ACER_CAP_WIRELESS:
 790                 if (value > 1)
 791                         return AE_BAD_PARAMETER;
 792                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 793                 break;
 794         case ACER_CAP_BLUETOOTH:
 795                 if (value > 1)
 796                         return AE_BAD_PARAMETER;
 797                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 798                 break;
 799         case ACER_CAP_THREEG:
 800                 if (value > 1)
 801                         return AE_BAD_PARAMETER;
 802                 method_id = ACER_WMID_SET_THREEG_METHODID;
 803                 break;
 804         case ACER_CAP_MAILLED:
 805                 if (value > 1)
 806                         return AE_BAD_PARAMETER;
 807                 if (quirks->mailled == 1) {
 808                         param = value ? 0x92 : 0x93;
 809                         i8042_lock_chip();
 810                         i8042_command(&param, 0x1059);
 811                         i8042_unlock_chip();
 812                         return 0;
 813                 }
 814                 break;
 815         default:
 816                 return AE_ERROR;
 817         }
 818         return WMI_execute_u32(method_id, (u32)value, NULL);
 819 }
 820
 821 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
 822 {
 823         struct hotkey_function_type_aa *type_aa;
 824
 825         /* We are looking for OEM-specific Type AAh */
 826         if (header->type != 0xAA)
 827                 return;
 828
 829         has_type_aa = true;
 830         type_aa = (struct hotkey_function_type_aa *) header;
 831
 832         printk(ACER_INFO "Function bitmap for Communication Button: 0x%x\n",
 833                 type_aa->commun_func_bitmap);
 834
 835         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
 836                 interface->capability |= ACER_CAP_WIRELESS;
 837         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
 838                 interface->capability |= ACER_CAP_THREEG;
 839         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
 840                 interface->capability |= ACER_CAP_BLUETOOTH;
 841 }
 842
 843 static acpi_status WMID_set_capabilities(void)
 844 {
 845         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 846         union acpi_object *obj;
 847         acpi_status status;
 848         u32 devices;
 849
 850         status = wmi_query_block(WMID_GUID2, 1, &out);
 851         if (ACPI_FAILURE(status))
 852                 return status;
 853
 854         obj = (union acpi_object *) out.pointer;
 855         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 856                 obj->buffer.length == sizeof(u32)) {
 857                 devices = *((u32 *) obj->buffer.pointer);
 858         } else {
 859                 kfree(out.pointer);
 860                 return AE_ERROR;
 861         }
 862
 863         dmi_walk(type_aa_dmi_decode, NULL);
 864         if (!has_type_aa) {
 865                 interface->capability |= ACER_CAP_WIRELESS;
 866                 interface->capability |= ACER_CAP_THREEG;
 867                 if (devices & 0x10)
 868                         interface->capability |= ACER_CAP_BLUETOOTH;
 869         }
 870
 871         /* WMID always provides brightness methods */
 872         interface->capability |= ACER_CAP_BRIGHTNESS;
 873
 874         if (!(devices & 0x20))
 875                 max_brightness = 0x9;
 876
 877         kfree(out.pointer);
 878         return status;
 879 }
 880
 881 static struct wmi_interface wmid_interface = {
 882         .type = ACER_WMID,
 883 };
 884
 885 /*
 886  * Generic Device (interface-independent)
 887  */
 888
 889 static acpi_status get_u32(u32 *value, u32 cap)
 890 {
 891         acpi_status status = AE_ERROR;
 892
 893         switch (interface->type) {
 894         case ACER_AMW0:
 895                 status = AMW0_get_u32(value, cap, interface);
 896                 break;
 897         case ACER_AMW0_V2:
 898                 if (cap == ACER_CAP_MAILLED) {
 899                         status = AMW0_get_u32(value, cap, interface);
 900                         break;
 901                 }
 902         case ACER_WMID:
 903                 status = WMID_get_u32(value, cap, interface);
 904                 break;
 905         }
 906
 907         return status;
 908 }
 909
 910 static acpi_status set_u32(u32 value, u32 cap)
 911 {
 912         acpi_status status;
 913
 914         if (interface->capability & cap) {
 915                 switch (interface->type) {
 916                 case ACER_AMW0:
 917                         return AMW0_set_u32(value, cap, interface);
 918                 case ACER_AMW0_V2:
 919                         if (cap == ACER_CAP_MAILLED)
 920                                 return AMW0_set_u32(value, cap, interface);
 921
 922                         /*
 923                          * On some models, some WMID methods don't toggle
 924                          * properly. For those cases, we want to run the AMW0
 925                          * method afterwards to be certain we've really toggled
 926                          * the device state.
 927                          */
 928                         if (cap == ACER_CAP_WIRELESS ||
 929                                 cap == ACER_CAP_BLUETOOTH) {
 930                                 status = WMID_set_u32(value, cap, interface);
 931                                 if (ACPI_FAILURE(status))
 932                                         return status;
 933
 934                                 return AMW0_set_u32(value, cap, interface);
 935                         }
 936                 case ACER_WMID:
 937                         return WMID_set_u32(value, cap, interface);
 938                 default:
 939                         return AE_BAD_PARAMETER;
 940                 }
 941         }
 942         return AE_BAD_PARAMETER;
 943 }
 944
 945 static void __init acer_commandline_init(void)
 946 {
 947         /*
 948          * These will all fail silently if the value given is invalid, or the
 949          * capability isn't available on the given interface
 950          */
 951         set_u32(mailled, ACER_CAP_MAILLED);
 952         if (!has_type_aa)
 953                 set_u32(threeg, ACER_CAP_THREEG);
 954         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 955 }
 956
 957 /*
 958  * LED device (Mail LED only, no other LEDs known yet)
 959  */
 960 static void mail_led_set(struct led_classdev *led_cdev,
 961 enum led_brightness value)
 962 {
 963         set_u32(value, ACER_CAP_MAILLED);
 964 }
 965
 966 static struct led_classdev mail_led = {
 967         .name = "acer-wmi::mail",
 968         .brightness_set = mail_led_set,
 969 };
 970
 971 static int __devinit acer_led_init(struct device *dev)
 972 {
 973         return led_classdev_register(dev, &mail_led);
 974 }
 975
 976 static void acer_led_exit(void)
 977 {
 978         led_classdev_unregister(&mail_led);
 979 }
 980
 981 /*
 982  * Backlight device
 983  */
 984 static struct backlight_device *acer_backlight_device;
 985
 986 static int read_brightness(struct backlight_device *bd)
 987 {
 988         u32 value;
 989         get_u32(&value, ACER_CAP_BRIGHTNESS);
 990         return value;
 991 }
 992
 993 static int update_bl_status(struct backlight_device *bd)
 994 {
 995         int intensity = bd->props.brightness;
 996
 997         if (bd->props.power != FB_BLANK_UNBLANK)
 998                 intensity = 0;
 999         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1000                 intensity = 0;
1001
1002         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1003
1004         return 0;
1005 }
1006
1007 static struct backlight_ops acer_bl_ops = {
1008         .get_brightness = read_brightness,
1009         .update_status = update_bl_status,
1010 };
1011
1012 static int __devinit acer_backlight_init(struct device *dev)
1013 {
1014         struct backlight_properties props;
1015         struct backlight_device *bd;
1016
1017         memset(&props, 0, sizeof(struct backlight_properties));
1018         props.max_brightness = max_brightness;
1019         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1020                                        &props);
1021         if (IS_ERR(bd)) {
1022                 printk(ACER_ERR "Could not register Acer backlight device\n");
1023                 acer_backlight_device = NULL;
1024                 return PTR_ERR(bd);
1025         }
1026
1027         acer_backlight_device = bd;
1028
1029         bd->props.power = FB_BLANK_UNBLANK;
1030         bd->props.brightness = read_brightness(bd);
1031         backlight_update_status(bd);
1032         return 0;
1033 }
1034
1035 static void acer_backlight_exit(void)
1036 {
1037         backlight_device_unregister(acer_backlight_device);
1038 }
1039
1040 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1041 {
1042         struct wmid3_gds_return_value return_value;
1043         acpi_status status;
1044         union acpi_object *obj;
1045         struct wmid3_gds_input_param params = {
1046                 .function_num = 0x1,
1047                 .hotkey_number = 0x01,
1048                 .devices = device,
1049         };
1050         struct acpi_buffer input = {
1051                 sizeof(struct wmid3_gds_input_param),
1052                 &params
1053         };
1054         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1055
1056         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1057         if (ACPI_FAILURE(status))
1058                 return status;
1059
1060         obj = output.pointer;
1061
1062         if (!obj)
1063                 return AE_ERROR;
1064         else if (obj->type != ACPI_TYPE_BUFFER) {
1065                 kfree(obj);
1066                 return AE_ERROR;
1067         }
1068         if (obj->buffer.length != 8) {
1069                 printk(ACER_WARNING "Unknown buffer length %d\n",
1070                         obj->buffer.length);
1071                 kfree(obj);
1072                 return AE_ERROR;
1073         }
1074
1075         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1076         kfree(obj);
1077
1078         if (return_value.error_code || return_value.ec_return_value)
1079                 printk(ACER_WARNING "Get Device Status failed: "
1080                         "0x%x - 0x%x\n", return_value.error_code,
1081                         return_value.ec_return_value);
1082         else
1083                 *value = !!(return_value.devices & device);
1084
1085         return status;
1086 }
1087
1088 static acpi_status get_device_status(u32 *value, u32 cap)
1089 {
1090         if (wmi_has_guid(WMID_GUID3)) {
1091                 u16 device;
1092
1093                 switch (cap) {
1094                 case ACER_CAP_WIRELESS:
1095                         device = ACER_WMID3_GDS_WIRELESS;
1096                         break;
1097                 case ACER_CAP_BLUETOOTH:
1098                         device = ACER_WMID3_GDS_BLUETOOTH;
1099                         break;
1100                 case ACER_CAP_THREEG:
1101                         device = ACER_WMID3_GDS_THREEG;
1102                         break;
1103                 default:
1104                         return AE_ERROR;
1105                 }
1106                 return wmid3_get_device_status(value, device);
1107
1108         } else {
1109                 return get_u32(value, cap);
1110         }
1111 }
1112
1113 /*
1114  * Rfkill devices
1115  */
1116 static void acer_rfkill_update(struct work_struct *ignored);
1117 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1118 static void acer_rfkill_update(struct work_struct *ignored)
1119 {
1120         u32 state;
1121         acpi_status status;
1122
1123         status = get_u32(&state, ACER_CAP_WIRELESS);
1124         if (ACPI_SUCCESS(status))
1125                 rfkill_set_sw_state(wireless_rfkill, !state);
1126
1127         if (has_cap(ACER_CAP_BLUETOOTH)) {
1128                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1129                 if (ACPI_SUCCESS(status))
1130                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1131         }
1132
1133         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1134                 status = wmid3_get_device_status(&state,
1135                                 ACER_WMID3_GDS_THREEG);
1136                 if (ACPI_SUCCESS(status))
1137                         rfkill_set_sw_state(threeg_rfkill, !state);
1138         }
1139
1140         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1141 }
1142
1143 static int acer_rfkill_set(void *data, bool blocked)
1144 {
1145         acpi_status status;
1146         u32 cap = (unsigned long)data;
1147         status = set_u32(!blocked, cap);
1148         if (ACPI_FAILURE(status))
1149                 return -ENODEV;
1150         return 0;
1151 }
1152
1153 static const struct rfkill_ops acer_rfkill_ops = {
1154         .set_block = acer_rfkill_set,
1155 };
1156
1157 static struct rfkill *acer_rfkill_register(struct device *dev,
1158                                            enum rfkill_type type,
1159                                            char *name, u32 cap)
1160 {
1161         int err;
1162         struct rfkill *rfkill_dev;
1163         u32 state;
1164         acpi_status status;
1165
1166         rfkill_dev = rfkill_alloc(name, dev, type,
1167                                   &acer_rfkill_ops,
1168                                   (void *)(unsigned long)cap);
1169         if (!rfkill_dev)
1170                 return ERR_PTR(-ENOMEM);
1171
1172         status = get_device_status(&state, cap);
1173         if (ACPI_SUCCESS(status))
1174                 rfkill_init_sw_state(rfkill_dev, !state);
1175
1176         err = rfkill_register(rfkill_dev);
1177         if (err) {
1178                 rfkill_destroy(rfkill_dev);
1179                 return ERR_PTR(err);
1180         }
1181         return rfkill_dev;
1182 }
1183
1184 static int acer_rfkill_init(struct device *dev)
1185 {
1186         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1187                 "acer-wireless", ACER_CAP_WIRELESS);
1188         if (IS_ERR(wireless_rfkill))
1189                 return PTR_ERR(wireless_rfkill);
1190
1191         if (has_cap(ACER_CAP_BLUETOOTH)) {
1192                 bluetooth_rfkill = acer_rfkill_register(dev,
1193                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1194                         ACER_CAP_BLUETOOTH);
1195                 if (IS_ERR(bluetooth_rfkill)) {
1196                         rfkill_unregister(wireless_rfkill);
1197                         rfkill_destroy(wireless_rfkill);
1198                         return PTR_ERR(bluetooth_rfkill);
1199                 }
1200         }
1201
1202         if (has_cap(ACER_CAP_THREEG)) {
1203                 threeg_rfkill = acer_rfkill_register(dev,
1204                         RFKILL_TYPE_WWAN, "acer-threeg",
1205                         ACER_CAP_THREEG);
1206                 if (IS_ERR(threeg_rfkill)) {
1207                         rfkill_unregister(wireless_rfkill);
1208                         rfkill_destroy(wireless_rfkill);
1209                         rfkill_unregister(bluetooth_rfkill);
1210                         rfkill_destroy(bluetooth_rfkill);
1211                         return PTR_ERR(threeg_rfkill);
1212                 }
1213         }
1214
1215         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1216
1217         return 0;
1218 }
1219
1220 static void acer_rfkill_exit(void)
1221 {
1222         cancel_delayed_work_sync(&acer_rfkill_work);
1223
1224         rfkill_unregister(wireless_rfkill);
1225         rfkill_destroy(wireless_rfkill);
1226
1227         if (has_cap(ACER_CAP_BLUETOOTH)) {
1228                 rfkill_unregister(bluetooth_rfkill);
1229                 rfkill_destroy(bluetooth_rfkill);
1230         }
1231
1232         if (has_cap(ACER_CAP_THREEG)) {
1233                 rfkill_unregister(threeg_rfkill);
1234                 rfkill_destroy(threeg_rfkill);
1235         }
1236         return;
1237 }
1238
1239 /*
1240  * sysfs interface
1241  */
1242 static ssize_t show_bool_threeg(struct device *dev,
1243         struct device_attribute *attr, char *buf)
1244 {
1245         u32 result; \
1246         acpi_status status;
1247         if (wmi_has_guid(WMID_GUID3))
1248                 status = wmid3_get_device_status(&result,
1249                                 ACER_WMID3_GDS_THREEG);
1250         else
1251                 status = get_u32(&result, ACER_CAP_THREEG);
1252         if (ACPI_SUCCESS(status))
1253                 return sprintf(buf, "%u\n", result);
1254         return sprintf(buf, "Read error\n");
1255 }
1256
1257 static ssize_t set_bool_threeg(struct device *dev,
1258         struct device_attribute *attr, const char *buf, size_t count)
1259 {
1260         u32 tmp = simple_strtoul(buf, NULL, 10);
1261         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1262                 if (ACPI_FAILURE(status))
1263                         return -EINVAL;
1264         return count;
1265 }
1266 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1267         set_bool_threeg);
1268
1269 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1270         char *buf)
1271 {
1272         switch (interface->type) {
1273         case ACER_AMW0:
1274                 return sprintf(buf, "AMW0\n");
1275         case ACER_AMW0_V2:
1276                 return sprintf(buf, "AMW0 v2\n");
1277         case ACER_WMID:
1278                 return sprintf(buf, "WMID\n");
1279         default:
1280                 return sprintf(buf, "Error!\n");
1281         }
1282 }
1283
1284 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1285
1286 static void acer_wmi_notify(u32 value, void *context)
1287 {
1288         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1289         union acpi_object *obj;
1290         struct event_return_value return_value;
1291         acpi_status status;
1292
1293         status = wmi_get_event_data(value, &response);
1294         if (status != AE_OK) {
1295                 printk(ACER_WARNING "bad event status 0x%x\n", status);
1296                 return;
1297         }
1298
1299         obj = (union acpi_object *)response.pointer;
1300
1301         if (!obj)
1302                 return;
1303         if (obj->type != ACPI_TYPE_BUFFER) {
1304                 printk(ACER_WARNING "Unknown response received %d\n",
1305                         obj->type);
1306                 kfree(obj);
1307                 return;
1308         }
1309         if (obj->buffer.length != 8) {
1310                 printk(ACER_WARNING "Unknown buffer length %d\n",
1311                         obj->buffer.length);
1312                 kfree(obj);
1313                 return;
1314         }
1315
1316         return_value = *((struct event_return_value *)obj->buffer.pointer);
1317         kfree(obj);
1318
1319         switch (return_value.function) {
1320         case WMID_HOTKEY_EVENT:
1321                 if (!sparse_keymap_report_event(acer_wmi_input_dev,
1322                                 return_value.key_num, 1, true))
1323                         printk(ACER_WARNING "Unknown key number - 0x%x\n",
1324                                 return_value.key_num);
1325                 break;
1326         default:
1327                 printk(ACER_WARNING "Unknown function number - %d - %d\n",
1328                         return_value.function, return_value.key_num);
1329                 break;
1330         }
1331 }
1332
1333 static int __init acer_wmi_input_setup(void)
1334 {
1335         acpi_status status;
1336         int err;
1337
1338         acer_wmi_input_dev = input_allocate_device();
1339         if (!acer_wmi_input_dev)
1340                 return -ENOMEM;
1341
1342         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1343         acer_wmi_input_dev->phys = "wmi/input0";
1344         acer_wmi_input_dev->id.bustype = BUS_HOST;
1345
1346         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1347         if (err)
1348                 goto err_free_dev;
1349
1350         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1351                                                 acer_wmi_notify, NULL);
1352         if (ACPI_FAILURE(status)) {
1353                 err = -EIO;
1354                 goto err_free_keymap;
1355         }
1356
1357         err = input_register_device(acer_wmi_input_dev);
1358         if (err)
1359                 goto err_uninstall_notifier;
1360
1361         return 0;
1362
1363 err_uninstall_notifier:
1364         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1365 err_free_keymap:
1366         sparse_keymap_free(acer_wmi_input_dev);
1367 err_free_dev:
1368         input_free_device(acer_wmi_input_dev);
1369         return err;
1370 }
1371
1372 static void acer_wmi_input_destroy(void)
1373 {
1374         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1375         sparse_keymap_free(acer_wmi_input_dev);
1376         input_unregister_device(acer_wmi_input_dev);
1377 }
1378
1379 /*
1380  * debugfs functions
1381  */
1382 static u32 get_wmid_devices(void)
1383 {
1384         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1385         union acpi_object *obj;
1386         acpi_status status;
1387         u32 devices = 0;
1388
1389         status = wmi_query_block(WMID_GUID2, 1, &out);
1390         if (ACPI_FAILURE(status))
1391                 return 0;
1392
1393         obj = (union acpi_object *) out.pointer;
1394         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1395                 obj->buffer.length == sizeof(u32)) {
1396                 devices = *((u32 *) obj->buffer.pointer);
1397         }
1398
1399         kfree(out.pointer);
1400         return devices;
1401 }
1402
1403 /*
1404  * Platform device
1405  */
1406 static int __devinit acer_platform_probe(struct platform_device *device)
1407 {
1408         int err;
1409
1410         if (has_cap(ACER_CAP_MAILLED)) {
1411                 err = acer_led_init(&device->dev);
1412                 if (err)
1413                         goto error_mailled;
1414         }
1415
1416         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1417                 err = acer_backlight_init(&device->dev);
1418                 if (err)
1419                         goto error_brightness;
1420         }
1421
1422         err = acer_rfkill_init(&device->dev);
1423         if (err)
1424                 goto error_rfkill;
1425
1426         return err;
1427
1428 error_rfkill:
1429         if (has_cap(ACER_CAP_BRIGHTNESS))
1430                 acer_backlight_exit();
1431 error_brightness:
1432         if (has_cap(ACER_CAP_MAILLED))
1433                 acer_led_exit();
1434 error_mailled:
1435         return err;
1436 }
1437
1438 static int acer_platform_remove(struct platform_device *device)
1439 {
1440         if (has_cap(ACER_CAP_MAILLED))
1441                 acer_led_exit();
1442         if (has_cap(ACER_CAP_BRIGHTNESS))
1443                 acer_backlight_exit();
1444
1445         acer_rfkill_exit();
1446         return 0;
1447 }
1448
1449 static int acer_platform_suspend(struct platform_device *dev,
1450 pm_message_t state)
1451 {
1452         u32 value;
1453         struct acer_data *data = &interface->data;
1454
1455         if (!data)
1456                 return -ENOMEM;
1457
1458         if (has_cap(ACER_CAP_MAILLED)) {
1459                 get_u32(&value, ACER_CAP_MAILLED);
1460                 data->mailled = value;
1461         }
1462
1463         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1464                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1465                 data->brightness = value;
1466         }
1467
1468         return 0;
1469 }
1470
1471 static int acer_platform_resume(struct platform_device *device)
1472 {
1473         struct acer_data *data = &interface->data;
1474
1475         if (!data)
1476                 return -ENOMEM;
1477
1478         if (has_cap(ACER_CAP_MAILLED))
1479                 set_u32(data->mailled, ACER_CAP_MAILLED);
1480
1481         if (has_cap(ACER_CAP_BRIGHTNESS))
1482                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1483
1484         return 0;
1485 }
1486
1487 static struct platform_driver acer_platform_driver = {
1488         .driver = {
1489                 .name = "acer-wmi",
1490                 .owner = THIS_MODULE,
1491         },
1492         .probe = acer_platform_probe,
1493         .remove = acer_platform_remove,
1494         .suspend = acer_platform_suspend,
1495         .resume = acer_platform_resume,
1496 };
1497
1498 static struct platform_device *acer_platform_device;
1499
1500 static int remove_sysfs(struct platform_device *device)
1501 {
1502         if (has_cap(ACER_CAP_THREEG))
1503                 device_remove_file(&device->dev, &dev_attr_threeg);
1504
1505         device_remove_file(&device->dev, &dev_attr_interface);
1506
1507         return 0;
1508 }
1509
1510 static int create_sysfs(void)
1511 {
1512         int retval = -ENOMEM;
1513
1514         if (has_cap(ACER_CAP_THREEG)) {
1515                 retval = device_create_file(&acer_platform_device->dev,
1516                         &dev_attr_threeg);
1517                 if (retval)
1518                         goto error_sysfs;
1519         }
1520
1521         retval = device_create_file(&acer_platform_device->dev,
1522                 &dev_attr_interface);
1523         if (retval)
1524                 goto error_sysfs;
1525
1526         return 0;
1527
1528 error_sysfs:
1529                 remove_sysfs(acer_platform_device);
1530         return retval;
1531 }
1532
1533 static void remove_debugfs(void)
1534 {
1535         debugfs_remove(interface->debug.devices);
1536         debugfs_remove(interface->debug.root);
1537 }
1538
1539 static int create_debugfs(void)
1540 {
1541         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1542         if (!interface->debug.root) {
1543                 printk(ACER_ERR "Failed to create debugfs directory");
1544                 return -ENOMEM;
1545         }
1546
1547         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1548                                         interface->debug.root,
1549                                         &interface->debug.wmid_devices);
1550         if (!interface->debug.devices)
1551                 goto error_debugfs;
1552
1553         return 0;
1554
1555 error_debugfs:
1556         remove_debugfs();
1557         return -ENOMEM;
1558 }
1559
1560 static int __init acer_wmi_init(void)
1561 {
1562         int err;
1563
1564         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1565
1566         if (dmi_check_system(acer_blacklist)) {
1567                 printk(ACER_INFO "Blacklisted hardware detected - "
1568                                 "not loading\n");
1569                 return -ENODEV;
1570         }
1571
1572         find_quirks();
1573
1574         /*
1575          * Detect which ACPI-WMI interface we're using.
1576          */
1577         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1578                 interface = &AMW0_V2_interface;
1579
1580         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1581                 interface = &wmid_interface;
1582
1583         if (wmi_has_guid(WMID_GUID2) && interface) {
1584                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1585                         printk(ACER_ERR "Unable to detect available WMID "
1586                                         "devices\n");
1587                         return -ENODEV;
1588                 }
1589         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1590                 printk(ACER_ERR "No WMID device detection method found\n");
1591                 return -ENODEV;
1592         }
1593
1594         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1595                 interface = &AMW0_interface;
1596
1597                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1598                         printk(ACER_ERR "Unable to detect available AMW0 "
1599                                         "devices\n");
1600                         return -ENODEV;
1601                 }
1602         }
1603
1604         if (wmi_has_guid(AMW0_GUID1))
1605                 AMW0_find_mailled();
1606
1607         if (!interface) {
1608                 printk(ACER_INFO "No or unsupported WMI interface, unable to "
1609                                 "load\n");
1610                 return -ENODEV;
1611         }
1612
1613         set_quirks();
1614
1615         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1616                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1617                 printk(ACER_INFO "Brightness must be controlled by "
1618                        "generic video driver\n");
1619         }
1620
1621         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1622                 err = acer_wmi_input_setup();
1623                 if (err)
1624                         return err;
1625         }
1626
1627         err = platform_driver_register(&acer_platform_driver);
1628         if (err) {
1629                 printk(ACER_ERR "Unable to register platform driver.\n");
1630                 goto error_platform_register;
1631         }
1632
1633         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1634         if (!acer_platform_device) {
1635                 err = -ENOMEM;
1636                 goto error_device_alloc;
1637         }
1638
1639         err = platform_device_add(acer_platform_device);
1640         if (err)
1641                 goto error_device_add;
1642
1643         err = create_sysfs();
1644         if (err)
1645                 goto error_create_sys;
1646
1647         if (wmi_has_guid(WMID_GUID2)) {
1648                 interface->debug.wmid_devices = get_wmid_devices();
1649                 err = create_debugfs();
1650                 if (err)
1651                         goto error_create_debugfs;
1652         }
1653
1654         /* Override any initial settings with values from the commandline */
1655         acer_commandline_init();
1656
1657         return 0;
1658
1659 error_create_debugfs:
1660         remove_sysfs(acer_platform_device);
1661 error_create_sys:
1662         platform_device_del(acer_platform_device);
1663 error_device_add:
1664         platform_device_put(acer_platform_device);
1665 error_device_alloc:
1666         platform_driver_unregister(&acer_platform_driver);
1667 error_platform_register:
1668         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1669                 acer_wmi_input_destroy();
1670
1671         return err;
1672 }
1673
1674 static void __exit acer_wmi_exit(void)
1675 {
1676         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1677                 acer_wmi_input_destroy();
1678
1679         remove_sysfs(acer_platform_device);
1680         remove_debugfs();
1681         platform_device_unregister(acer_platform_device);
1682         platform_driver_unregister(&acer_platform_driver);
1683
1684         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1685         return;
1686 }
1687
1688 module_init(acer_wmi_init);
1689 module_exit(acer_wmi_exit);