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 /*
1089  * Rfkill devices
1090  */
1091 static void acer_rfkill_update(struct work_struct *ignored);
1092 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1093 static void acer_rfkill_update(struct work_struct *ignored)
1094 {
1095         u32 state;
1096         acpi_status status;
1097
1098         status = get_u32(&state, ACER_CAP_WIRELESS);
1099         if (ACPI_SUCCESS(status))
1100                 rfkill_set_sw_state(wireless_rfkill, !state);
1101
1102         if (has_cap(ACER_CAP_BLUETOOTH)) {
1103                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1104                 if (ACPI_SUCCESS(status))
1105                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1106         }
1107
1108         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1109                 status = wmid3_get_device_status(&state,
1110                                 ACER_WMID3_GDS_THREEG);
1111                 if (ACPI_SUCCESS(status))
1112                         rfkill_set_sw_state(threeg_rfkill, !state);
1113         }
1114
1115         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1116 }
1117
1118 static int acer_rfkill_set(void *data, bool blocked)
1119 {
1120         acpi_status status;
1121         u32 cap = (unsigned long)data;
1122         status = set_u32(!blocked, cap);
1123         if (ACPI_FAILURE(status))
1124                 return -ENODEV;
1125         return 0;
1126 }
1127
1128 static const struct rfkill_ops acer_rfkill_ops = {
1129         .set_block = acer_rfkill_set,
1130 };
1131
1132 static struct rfkill *acer_rfkill_register(struct device *dev,
1133                                            enum rfkill_type type,
1134                                            char *name, u32 cap)
1135 {
1136         int err;
1137         struct rfkill *rfkill_dev;
1138
1139         rfkill_dev = rfkill_alloc(name, dev, type,
1140                                   &acer_rfkill_ops,
1141                                   (void *)(unsigned long)cap);
1142         if (!rfkill_dev)
1143                 return ERR_PTR(-ENOMEM);
1144
1145         err = rfkill_register(rfkill_dev);
1146         if (err) {
1147                 rfkill_destroy(rfkill_dev);
1148                 return ERR_PTR(err);
1149         }
1150         return rfkill_dev;
1151 }
1152
1153 static int acer_rfkill_init(struct device *dev)
1154 {
1155         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1156                 "acer-wireless", ACER_CAP_WIRELESS);
1157         if (IS_ERR(wireless_rfkill))
1158                 return PTR_ERR(wireless_rfkill);
1159
1160         if (has_cap(ACER_CAP_BLUETOOTH)) {
1161                 bluetooth_rfkill = acer_rfkill_register(dev,
1162                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1163                         ACER_CAP_BLUETOOTH);
1164                 if (IS_ERR(bluetooth_rfkill)) {
1165                         rfkill_unregister(wireless_rfkill);
1166                         rfkill_destroy(wireless_rfkill);
1167                         return PTR_ERR(bluetooth_rfkill);
1168                 }
1169         }
1170
1171         if (has_cap(ACER_CAP_THREEG)) {
1172                 threeg_rfkill = acer_rfkill_register(dev,
1173                         RFKILL_TYPE_WWAN, "acer-threeg",
1174                         ACER_CAP_THREEG);
1175                 if (IS_ERR(threeg_rfkill)) {
1176                         rfkill_unregister(wireless_rfkill);
1177                         rfkill_destroy(wireless_rfkill);
1178                         rfkill_unregister(bluetooth_rfkill);
1179                         rfkill_destroy(bluetooth_rfkill);
1180                         return PTR_ERR(threeg_rfkill);
1181                 }
1182         }
1183
1184         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1185
1186         return 0;
1187 }
1188
1189 static void acer_rfkill_exit(void)
1190 {
1191         cancel_delayed_work_sync(&acer_rfkill_work);
1192
1193         rfkill_unregister(wireless_rfkill);
1194         rfkill_destroy(wireless_rfkill);
1195
1196         if (has_cap(ACER_CAP_BLUETOOTH)) {
1197                 rfkill_unregister(bluetooth_rfkill);
1198                 rfkill_destroy(bluetooth_rfkill);
1199         }
1200
1201         if (has_cap(ACER_CAP_THREEG)) {
1202                 rfkill_unregister(threeg_rfkill);
1203                 rfkill_destroy(threeg_rfkill);
1204         }
1205         return;
1206 }
1207
1208 /*
1209  * sysfs interface
1210  */
1211 static ssize_t show_bool_threeg(struct device *dev,
1212         struct device_attribute *attr, char *buf)
1213 {
1214         u32 result; \
1215         acpi_status status;
1216         if (wmi_has_guid(WMID_GUID3))
1217                 status = wmid3_get_device_status(&result,
1218                                 ACER_WMID3_GDS_THREEG);
1219         else
1220                 status = get_u32(&result, ACER_CAP_THREEG);
1221         if (ACPI_SUCCESS(status))
1222                 return sprintf(buf, "%u\n", result);
1223         return sprintf(buf, "Read error\n");
1224 }
1225
1226 static ssize_t set_bool_threeg(struct device *dev,
1227         struct device_attribute *attr, const char *buf, size_t count)
1228 {
1229         u32 tmp = simple_strtoul(buf, NULL, 10);
1230         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1231                 if (ACPI_FAILURE(status))
1232                         return -EINVAL;
1233         return count;
1234 }
1235 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1236         set_bool_threeg);
1237
1238 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1239         char *buf)
1240 {
1241         switch (interface->type) {
1242         case ACER_AMW0:
1243                 return sprintf(buf, "AMW0\n");
1244         case ACER_AMW0_V2:
1245                 return sprintf(buf, "AMW0 v2\n");
1246         case ACER_WMID:
1247                 return sprintf(buf, "WMID\n");
1248         default:
1249                 return sprintf(buf, "Error!\n");
1250         }
1251 }
1252
1253 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1254
1255 static void acer_wmi_notify(u32 value, void *context)
1256 {
1257         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1258         union acpi_object *obj;
1259         struct event_return_value return_value;
1260         acpi_status status;
1261
1262         status = wmi_get_event_data(value, &response);
1263         if (status != AE_OK) {
1264                 printk(ACER_WARNING "bad event status 0x%x\n", status);
1265                 return;
1266         }
1267
1268         obj = (union acpi_object *)response.pointer;
1269
1270         if (!obj)
1271                 return;
1272         if (obj->type != ACPI_TYPE_BUFFER) {
1273                 printk(ACER_WARNING "Unknown response received %d\n",
1274                         obj->type);
1275                 kfree(obj);
1276                 return;
1277         }
1278         if (obj->buffer.length != 8) {
1279                 printk(ACER_WARNING "Unknown buffer length %d\n",
1280                         obj->buffer.length);
1281                 kfree(obj);
1282                 return;
1283         }
1284
1285         return_value = *((struct event_return_value *)obj->buffer.pointer);
1286         kfree(obj);
1287
1288         switch (return_value.function) {
1289         case WMID_HOTKEY_EVENT:
1290                 if (!sparse_keymap_report_event(acer_wmi_input_dev,
1291                                 return_value.key_num, 1, true))
1292                         printk(ACER_WARNING "Unknown key number - 0x%x\n",
1293                                 return_value.key_num);
1294                 break;
1295         default:
1296                 printk(ACER_WARNING "Unknown function number - %d - %d\n",
1297                         return_value.function, return_value.key_num);
1298                 break;
1299         }
1300 }
1301
1302 static int __init acer_wmi_input_setup(void)
1303 {
1304         acpi_status status;
1305         int err;
1306
1307         acer_wmi_input_dev = input_allocate_device();
1308         if (!acer_wmi_input_dev)
1309                 return -ENOMEM;
1310
1311         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1312         acer_wmi_input_dev->phys = "wmi/input0";
1313         acer_wmi_input_dev->id.bustype = BUS_HOST;
1314
1315         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1316         if (err)
1317                 goto err_free_dev;
1318
1319         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1320                                                 acer_wmi_notify, NULL);
1321         if (ACPI_FAILURE(status)) {
1322                 err = -EIO;
1323                 goto err_free_keymap;
1324         }
1325
1326         err = input_register_device(acer_wmi_input_dev);
1327         if (err)
1328                 goto err_uninstall_notifier;
1329
1330         return 0;
1331
1332 err_uninstall_notifier:
1333         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1334 err_free_keymap:
1335         sparse_keymap_free(acer_wmi_input_dev);
1336 err_free_dev:
1337         input_free_device(acer_wmi_input_dev);
1338         return err;
1339 }
1340
1341 static void acer_wmi_input_destroy(void)
1342 {
1343         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1344         sparse_keymap_free(acer_wmi_input_dev);
1345         input_unregister_device(acer_wmi_input_dev);
1346 }
1347
1348 /*
1349  * debugfs functions
1350  */
1351 static u32 get_wmid_devices(void)
1352 {
1353         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1354         union acpi_object *obj;
1355         acpi_status status;
1356         u32 devices = 0;
1357
1358         status = wmi_query_block(WMID_GUID2, 1, &out);
1359         if (ACPI_FAILURE(status))
1360                 return 0;
1361
1362         obj = (union acpi_object *) out.pointer;
1363         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1364                 obj->buffer.length == sizeof(u32)) {
1365                 devices = *((u32 *) obj->buffer.pointer);
1366         }
1367
1368         kfree(out.pointer);
1369         return devices;
1370 }
1371
1372 /*
1373  * Platform device
1374  */
1375 static int __devinit acer_platform_probe(struct platform_device *device)
1376 {
1377         int err;
1378
1379         if (has_cap(ACER_CAP_MAILLED)) {
1380                 err = acer_led_init(&device->dev);
1381                 if (err)
1382                         goto error_mailled;
1383         }
1384
1385         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1386                 err = acer_backlight_init(&device->dev);
1387                 if (err)
1388                         goto error_brightness;
1389         }
1390
1391         err = acer_rfkill_init(&device->dev);
1392         if (err)
1393                 goto error_rfkill;
1394
1395         return err;
1396
1397 error_rfkill:
1398         if (has_cap(ACER_CAP_BRIGHTNESS))
1399                 acer_backlight_exit();
1400 error_brightness:
1401         if (has_cap(ACER_CAP_MAILLED))
1402                 acer_led_exit();
1403 error_mailled:
1404         return err;
1405 }
1406
1407 static int acer_platform_remove(struct platform_device *device)
1408 {
1409         if (has_cap(ACER_CAP_MAILLED))
1410                 acer_led_exit();
1411         if (has_cap(ACER_CAP_BRIGHTNESS))
1412                 acer_backlight_exit();
1413
1414         acer_rfkill_exit();
1415         return 0;
1416 }
1417
1418 static int acer_platform_suspend(struct platform_device *dev,
1419 pm_message_t state)
1420 {
1421         u32 value;
1422         struct acer_data *data = &interface->data;
1423
1424         if (!data)
1425                 return -ENOMEM;
1426
1427         if (has_cap(ACER_CAP_MAILLED)) {
1428                 get_u32(&value, ACER_CAP_MAILLED);
1429                 data->mailled = value;
1430         }
1431
1432         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1433                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1434                 data->brightness = value;
1435         }
1436
1437         return 0;
1438 }
1439
1440 static int acer_platform_resume(struct platform_device *device)
1441 {
1442         struct acer_data *data = &interface->data;
1443
1444         if (!data)
1445                 return -ENOMEM;
1446
1447         if (has_cap(ACER_CAP_MAILLED))
1448                 set_u32(data->mailled, ACER_CAP_MAILLED);
1449
1450         if (has_cap(ACER_CAP_BRIGHTNESS))
1451                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1452
1453         return 0;
1454 }
1455
1456 static struct platform_driver acer_platform_driver = {
1457         .driver = {
1458                 .name = "acer-wmi",
1459                 .owner = THIS_MODULE,
1460         },
1461         .probe = acer_platform_probe,
1462         .remove = acer_platform_remove,
1463         .suspend = acer_platform_suspend,
1464         .resume = acer_platform_resume,
1465 };
1466
1467 static struct platform_device *acer_platform_device;
1468
1469 static int remove_sysfs(struct platform_device *device)
1470 {
1471         if (has_cap(ACER_CAP_THREEG))
1472                 device_remove_file(&device->dev, &dev_attr_threeg);
1473
1474         device_remove_file(&device->dev, &dev_attr_interface);
1475
1476         return 0;
1477 }
1478
1479 static int create_sysfs(void)
1480 {
1481         int retval = -ENOMEM;
1482
1483         if (has_cap(ACER_CAP_THREEG)) {
1484                 retval = device_create_file(&acer_platform_device->dev,
1485                         &dev_attr_threeg);
1486                 if (retval)
1487                         goto error_sysfs;
1488         }
1489
1490         retval = device_create_file(&acer_platform_device->dev,
1491                 &dev_attr_interface);
1492         if (retval)
1493                 goto error_sysfs;
1494
1495         return 0;
1496
1497 error_sysfs:
1498                 remove_sysfs(acer_platform_device);
1499         return retval;
1500 }
1501
1502 static void remove_debugfs(void)
1503 {
1504         debugfs_remove(interface->debug.devices);
1505         debugfs_remove(interface->debug.root);
1506 }
1507
1508 static int create_debugfs(void)
1509 {
1510         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1511         if (!interface->debug.root) {
1512                 printk(ACER_ERR "Failed to create debugfs directory");
1513                 return -ENOMEM;
1514         }
1515
1516         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1517                                         interface->debug.root,
1518                                         &interface->debug.wmid_devices);
1519         if (!interface->debug.devices)
1520                 goto error_debugfs;
1521
1522         return 0;
1523
1524 error_debugfs:
1525         remove_debugfs();
1526         return -ENOMEM;
1527 }
1528
1529 static int __init acer_wmi_init(void)
1530 {
1531         int err;
1532
1533         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1534
1535         if (dmi_check_system(acer_blacklist)) {
1536                 printk(ACER_INFO "Blacklisted hardware detected - "
1537                                 "not loading\n");
1538                 return -ENODEV;
1539         }
1540
1541         find_quirks();
1542
1543         /*
1544          * Detect which ACPI-WMI interface we're using.
1545          */
1546         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1547                 interface = &AMW0_V2_interface;
1548
1549         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1550                 interface = &wmid_interface;
1551
1552         if (wmi_has_guid(WMID_GUID2) && interface) {
1553                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1554                         printk(ACER_ERR "Unable to detect available WMID "
1555                                         "devices\n");
1556                         return -ENODEV;
1557                 }
1558         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1559                 printk(ACER_ERR "No WMID device detection method found\n");
1560                 return -ENODEV;
1561         }
1562
1563         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1564                 interface = &AMW0_interface;
1565
1566                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1567                         printk(ACER_ERR "Unable to detect available AMW0 "
1568                                         "devices\n");
1569                         return -ENODEV;
1570                 }
1571         }
1572
1573         if (wmi_has_guid(AMW0_GUID1))
1574                 AMW0_find_mailled();
1575
1576         if (!interface) {
1577                 printk(ACER_INFO "No or unsupported WMI interface, unable to "
1578                                 "load\n");
1579                 return -ENODEV;
1580         }
1581
1582         set_quirks();
1583
1584         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1585                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1586                 printk(ACER_INFO "Brightness must be controlled by "
1587                        "generic video driver\n");
1588         }
1589
1590         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1591                 err = acer_wmi_input_setup();
1592                 if (err)
1593                         return err;
1594         }
1595
1596         err = platform_driver_register(&acer_platform_driver);
1597         if (err) {
1598                 printk(ACER_ERR "Unable to register platform driver.\n");
1599                 goto error_platform_register;
1600         }
1601
1602         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1603         if (!acer_platform_device) {
1604                 err = -ENOMEM;
1605                 goto error_device_alloc;
1606         }
1607
1608         err = platform_device_add(acer_platform_device);
1609         if (err)
1610                 goto error_device_add;
1611
1612         err = create_sysfs();
1613         if (err)
1614                 goto error_create_sys;
1615
1616         if (wmi_has_guid(WMID_GUID2)) {
1617                 interface->debug.wmid_devices = get_wmid_devices();
1618                 err = create_debugfs();
1619                 if (err)
1620                         goto error_create_debugfs;
1621         }
1622
1623         /* Override any initial settings with values from the commandline */
1624         acer_commandline_init();
1625
1626         return 0;
1627
1628 error_create_debugfs:
1629         remove_sysfs(acer_platform_device);
1630 error_create_sys:
1631         platform_device_del(acer_platform_device);
1632 error_device_add:
1633         platform_device_put(acer_platform_device);
1634 error_device_alloc:
1635         platform_driver_unregister(&acer_platform_driver);
1636 error_platform_register:
1637         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1638                 acer_wmi_input_destroy();
1639
1640         return err;
1641 }
1642
1643 static void __exit acer_wmi_exit(void)
1644 {
1645         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1646                 acer_wmi_input_destroy();
1647
1648         remove_sysfs(acer_platform_device);
1649         remove_debugfs();
1650         platform_device_unregister(acer_platform_device);
1651         platform_driver_unregister(&acer_platform_driver);
1652
1653         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1654         return;
1655 }
1656
1657 module_init(acer_wmi_init);
1658 module_exit(acer_wmi_exit);