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