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 lm_input_params {
 133         u8 function_num;        /* Function Number */
 134         u16 commun_devices;     /* Communication type devices default status */
 135         u16 devices;            /* Other type devices default status */
 136         u8 lm_status;           /* Launch Manager Status */
 137         u16 reserved;
 138 } __attribute__((packed));
 139
 140 struct lm_return_value {
 141         u8 error_code;          /* Error Code */
 142         u8 ec_return_value;     /* EC Return Value */
 143         u16 reserved;
 144 } __attribute__((packed));
 145
 146 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
 147         u8 function_num;        /* Function Number */
 148         u8 hotkey_number;       /* Hotkey Number */
 149         u16 devices;            /* Get Device */
 150 } __attribute__((packed));
 151
 152 struct wmid3_gds_return_value { /* Get Device Status return value*/
 153         u8 error_code;          /* Error Code */
 154         u8 ec_return_value;     /* EC Return Value */
 155         u16 devices;            /* Current Device Status */
 156         u32 reserved;
 157 } __attribute__((packed));
 158
 159 struct hotkey_function_type_aa {
 160         u8 type;
 161         u8 length;
 162         u16 handle;
 163         u16 commun_func_bitmap;
 164 } __attribute__((packed));
 165
 166 /*
 167  * Interface capability flags
 168  */
 169 #define ACER_CAP_MAILLED                (1<<0)
 170 #define ACER_CAP_WIRELESS               (1<<1)
 171 #define ACER_CAP_BLUETOOTH              (1<<2)
 172 #define ACER_CAP_BRIGHTNESS             (1<<3)
 173 #define ACER_CAP_THREEG                 (1<<4)
 174 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 175
 176 /*
 177  * Interface type flags
 178  */
 179 enum interface_flags {
 180         ACER_AMW0,
 181         ACER_AMW0_V2,
 182         ACER_WMID,
 183 };
 184
 185 #define ACER_DEFAULT_WIRELESS  0
 186 #define ACER_DEFAULT_BLUETOOTH 0
 187 #define ACER_DEFAULT_MAILLED   0
 188 #define ACER_DEFAULT_THREEG    0
 189
 190 static int max_brightness = 0xF;
 191
 192 static int mailled = -1;
 193 static int brightness = -1;
 194 static int threeg = -1;
 195 static int force_series;
 196 static bool ec_raw_mode;
 197 static bool has_type_aa;
 198
 199 module_param(mailled, int, 0444);
 200 module_param(brightness, int, 0444);
 201 module_param(threeg, int, 0444);
 202 module_param(force_series, int, 0444);
 203 module_param(ec_raw_mode, bool, 0444);
 204 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 205 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 206 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 207 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 208 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
 209
 210 struct acer_data {
 211         int mailled;
 212         int threeg;
 213         int brightness;
 214 };
 215
 216 struct acer_debug {
 217         struct dentry *root;
 218         struct dentry *devices;
 219         u32 wmid_devices;
 220 };
 221
 222 static struct rfkill *wireless_rfkill;
 223 static struct rfkill *bluetooth_rfkill;
 224 static struct rfkill *threeg_rfkill;
 225 static bool rfkill_inited;
 226
 227 /* Each low-level interface must define at least some of the following */
 228 struct wmi_interface {
 229         /* The WMI device type */
 230         u32 type;
 231
 232         /* The capabilities this interface provides */
 233         u32 capability;
 234
 235         /* Private data for the current interface */
 236         struct acer_data data;
 237
 238         /* debugfs entries associated with this interface */
 239         struct acer_debug debug;
 240 };
 241
 242 /* The static interface pointer, points to the currently detected interface */
 243 static struct wmi_interface *interface;
 244
 245 /*
 246  * Embedded Controller quirks
 247  * Some laptops require us to directly access the EC to either enable or query
 248  * features that are not available through WMI.
 249  */
 250
 251 struct quirk_entry {
 252         u8 wireless;
 253         u8 mailled;
 254         s8 brightness;
 255         u8 bluetooth;
 256 };
 257
 258 static struct quirk_entry *quirks;
 259
 260 static void set_quirks(void)
 261 {
 262         if (!interface)
 263                 return;
 264
 265         if (quirks->mailled)
 266                 interface->capability |= ACER_CAP_MAILLED;
 267
 268         if (quirks->brightness)
 269                 interface->capability |= ACER_CAP_BRIGHTNESS;
 270 }
 271
 272 static int dmi_matched(const struct dmi_system_id *dmi)
 273 {
 274         quirks = dmi->driver_data;
 275         return 1;
 276 }
 277
 278 static struct quirk_entry quirk_unknown = {
 279 };
 280
 281 static struct quirk_entry quirk_acer_aspire_1520 = {
 282         .brightness = -1,
 283 };
 284
 285 static struct quirk_entry quirk_acer_travelmate_2490 = {
 286         .mailled = 1,
 287 };
 288
 289 /* This AMW0 laptop has no bluetooth */
 290 static struct quirk_entry quirk_medion_md_98300 = {
 291         .wireless = 1,
 292 };
 293
 294 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 295         .wireless = 2,
 296 };
 297
 298 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 299 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 300         {
 301                 .ident = "Acer Aspire One (SSD)",
 302                 .matches = {
 303                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 304                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 305                 },
 306         },
 307         {
 308                 .ident = "Acer Aspire One (HDD)",
 309                 .matches = {
 310                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 311                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 312                 },
 313         },
 314         {}
 315 };
 316
 317 static struct dmi_system_id acer_quirks[] = {
 318         {
 319                 .callback = dmi_matched,
 320                 .ident = "Acer Aspire 1360",
 321                 .matches = {
 322                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 323                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 324                 },
 325                 .driver_data = &quirk_acer_aspire_1520,
 326         },
 327         {
 328                 .callback = dmi_matched,
 329                 .ident = "Acer Aspire 1520",
 330                 .matches = {
 331                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 332                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 333                 },
 334                 .driver_data = &quirk_acer_aspire_1520,
 335         },
 336         {
 337                 .callback = dmi_matched,
 338                 .ident = "Acer Aspire 3100",
 339                 .matches = {
 340                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 341                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 342                 },
 343                 .driver_data = &quirk_acer_travelmate_2490,
 344         },
 345         {
 346                 .callback = dmi_matched,
 347                 .ident = "Acer Aspire 3610",
 348                 .matches = {
 349                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 350                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 351                 },
 352                 .driver_data = &quirk_acer_travelmate_2490,
 353         },
 354         {
 355                 .callback = dmi_matched,
 356                 .ident = "Acer Aspire 5100",
 357                 .matches = {
 358                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 359                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 360                 },
 361                 .driver_data = &quirk_acer_travelmate_2490,
 362         },
 363         {
 364                 .callback = dmi_matched,
 365                 .ident = "Acer Aspire 5610",
 366                 .matches = {
 367                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 368                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 369                 },
 370                 .driver_data = &quirk_acer_travelmate_2490,
 371         },
 372         {
 373                 .callback = dmi_matched,
 374                 .ident = "Acer Aspire 5630",
 375                 .matches = {
 376                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 377                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 378                 },
 379                 .driver_data = &quirk_acer_travelmate_2490,
 380         },
 381         {
 382                 .callback = dmi_matched,
 383                 .ident = "Acer Aspire 5650",
 384                 .matches = {
 385                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 386                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 387                 },
 388                 .driver_data = &quirk_acer_travelmate_2490,
 389         },
 390         {
 391                 .callback = dmi_matched,
 392                 .ident = "Acer Aspire 5680",
 393                 .matches = {
 394                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 395                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 396                 },
 397                 .driver_data = &quirk_acer_travelmate_2490,
 398         },
 399         {
 400                 .callback = dmi_matched,
 401                 .ident = "Acer Aspire 9110",
 402                 .matches = {
 403                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 404                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 405                 },
 406                 .driver_data = &quirk_acer_travelmate_2490,
 407         },
 408         {
 409                 .callback = dmi_matched,
 410                 .ident = "Acer TravelMate 2490",
 411                 .matches = {
 412                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 413                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 414                 },
 415                 .driver_data = &quirk_acer_travelmate_2490,
 416         },
 417         {
 418                 .callback = dmi_matched,
 419                 .ident = "Acer TravelMate 4200",
 420                 .matches = {
 421                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 422                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 423                 },
 424                 .driver_data = &quirk_acer_travelmate_2490,
 425         },
 426         {
 427                 .callback = dmi_matched,
 428                 .ident = "Fujitsu Siemens Amilo Li 1718",
 429                 .matches = {
 430                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 431                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 432                 },
 433                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 434         },
 435         {
 436                 .callback = dmi_matched,
 437                 .ident = "Medion MD 98300",
 438                 .matches = {
 439                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 440                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 441                 },
 442                 .driver_data = &quirk_medion_md_98300,
 443         },
 444         {}
 445 };
 446
 447 /* Find which quirks are needed for a particular vendor/ model pair */
 448 static void find_quirks(void)
 449 {
 450         if (!force_series) {
 451                 dmi_check_system(acer_quirks);
 452         } else if (force_series == 2490) {
 453                 quirks = &quirk_acer_travelmate_2490;
 454         }
 455
 456         if (quirks == NULL)
 457                 quirks = &quirk_unknown;
 458
 459         set_quirks();
 460 }
 461
 462 /*
 463  * General interface convenience methods
 464  */
 465
 466 static bool has_cap(u32 cap)
 467 {
 468         if ((interface->capability & cap) != 0)
 469                 return 1;
 470
 471         return 0;
 472 }
 473
 474 /*
 475  * AMW0 (V1) interface
 476  */
 477 struct wmab_args {
 478         u32 eax;
 479         u32 ebx;
 480         u32 ecx;
 481         u32 edx;
 482 };
 483
 484 struct wmab_ret {
 485         u32 eax;
 486         u32 ebx;
 487         u32 ecx;
 488         u32 edx;
 489         u32 eex;
 490 };
 491
 492 static acpi_status wmab_execute(struct wmab_args *regbuf,
 493 struct acpi_buffer *result)
 494 {
 495         struct acpi_buffer input;
 496         acpi_status status;
 497         input.length = sizeof(struct wmab_args);
 498         input.pointer = (u8 *)regbuf;
 499
 500         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 501
 502         return status;
 503 }
 504
 505 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 506 struct wmi_interface *iface)
 507 {
 508         int err;
 509         u8 result;
 510
 511         switch (cap) {
 512         case ACER_CAP_MAILLED:
 513                 switch (quirks->mailled) {
 514                 default:
 515                         err = ec_read(0xA, &result);
 516                         if (err)
 517                                 return AE_ERROR;
 518                         *value = (result >> 7) & 0x1;
 519                         return AE_OK;
 520                 }
 521                 break;
 522         case ACER_CAP_WIRELESS:
 523                 switch (quirks->wireless) {
 524                 case 1:
 525                         err = ec_read(0x7B, &result);
 526                         if (err)
 527                                 return AE_ERROR;
 528                         *value = result & 0x1;
 529                         return AE_OK;
 530                 case 2:
 531                         err = ec_read(0x71, &result);
 532                         if (err)
 533                                 return AE_ERROR;
 534                         *value = result & 0x1;
 535                         return AE_OK;
 536                 default:
 537                         err = ec_read(0xA, &result);
 538                         if (err)
 539                                 return AE_ERROR;
 540                         *value = (result >> 2) & 0x1;
 541                         return AE_OK;
 542                 }
 543                 break;
 544         case ACER_CAP_BLUETOOTH:
 545                 switch (quirks->bluetooth) {
 546                 default:
 547                         err = ec_read(0xA, &result);
 548                         if (err)
 549                                 return AE_ERROR;
 550                         *value = (result >> 4) & 0x1;
 551                         return AE_OK;
 552                 }
 553                 break;
 554         case ACER_CAP_BRIGHTNESS:
 555                 switch (quirks->brightness) {
 556                 default:
 557                         err = ec_read(0x83, &result);
 558                         if (err)
 559                                 return AE_ERROR;
 560                         *value = result;
 561                         return AE_OK;
 562                 }
 563                 break;
 564         default:
 565                 return AE_ERROR;
 566         }
 567         return AE_OK;
 568 }
 569
 570 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 571 {
 572         struct wmab_args args;
 573
 574         args.eax = ACER_AMW0_WRITE;
 575         args.ebx = value ? (1<<8) : 0;
 576         args.ecx = args.edx = 0;
 577
 578         switch (cap) {
 579         case ACER_CAP_MAILLED:
 580                 if (value > 1)
 581                         return AE_BAD_PARAMETER;
 582                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 583                 break;
 584         case ACER_CAP_WIRELESS:
 585                 if (value > 1)
 586                         return AE_BAD_PARAMETER;
 587                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 588                 break;
 589         case ACER_CAP_BLUETOOTH:
 590                 if (value > 1)
 591                         return AE_BAD_PARAMETER;
 592                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 593                 break;
 594         case ACER_CAP_BRIGHTNESS:
 595                 if (value > max_brightness)
 596                         return AE_BAD_PARAMETER;
 597                 switch (quirks->brightness) {
 598                 default:
 599                         return ec_write(0x83, value);
 600                         break;
 601                 }
 602         default:
 603                 return AE_ERROR;
 604         }
 605
 606         /* Actually do the set */
 607         return wmab_execute(&args, NULL);
 608 }
 609
 610 static acpi_status AMW0_find_mailled(void)
 611 {
 612         struct wmab_args args;
 613         struct wmab_ret ret;
 614         acpi_status status = AE_OK;
 615         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 616         union acpi_object *obj;
 617
 618         args.eax = 0x86;
 619         args.ebx = args.ecx = args.edx = 0;
 620
 621         status = wmab_execute(&args, &out);
 622         if (ACPI_FAILURE(status))
 623                 return status;
 624
 625         obj = (union acpi_object *) out.pointer;
 626         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 627         obj->buffer.length == sizeof(struct wmab_ret)) {
 628                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 629         } else {
 630                 kfree(out.pointer);
 631                 return AE_ERROR;
 632         }
 633
 634         if (ret.eex & 0x1)
 635                 interface->capability |= ACER_CAP_MAILLED;
 636
 637         kfree(out.pointer);
 638
 639         return AE_OK;
 640 }
 641
 642 static acpi_status AMW0_set_capabilities(void)
 643 {
 644         struct wmab_args args;
 645         struct wmab_ret ret;
 646         acpi_status status;
 647         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 648         union acpi_object *obj;
 649
 650         /*
 651          * On laptops with this strange GUID (non Acer), normal probing doesn't
 652          * work.
 653          */
 654         if (wmi_has_guid(AMW0_GUID2)) {
 655                 interface->capability |= ACER_CAP_WIRELESS;
 656                 return AE_OK;
 657         }
 658
 659         args.eax = ACER_AMW0_WRITE;
 660         args.ecx = args.edx = 0;
 661
 662         args.ebx = 0xa2 << 8;
 663         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 664
 665         status = wmab_execute(&args, &out);
 666         if (ACPI_FAILURE(status))
 667                 return status;
 668
 669         obj = out.pointer;
 670         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 671         obj->buffer.length == sizeof(struct wmab_ret)) {
 672                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 673         } else {
 674                 status = AE_ERROR;
 675                 goto out;
 676         }
 677
 678         if (ret.eax & 0x1)
 679                 interface->capability |= ACER_CAP_WIRELESS;
 680
 681         args.ebx = 2 << 8;
 682         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 683
 684         /*
 685          * It's ok to use existing buffer for next wmab_execute call.
 686          * But we need to kfree(out.pointer) if next wmab_execute fail.
 687          */
 688         status = wmab_execute(&args, &out);
 689         if (ACPI_FAILURE(status))
 690                 goto out;
 691
 692         obj = (union acpi_object *) out.pointer;
 693         if (obj && obj->type == ACPI_TYPE_BUFFER
 694         && obj->buffer.length == sizeof(struct wmab_ret)) {
 695                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 696         } else {
 697                 status = AE_ERROR;
 698                 goto out;
 699         }
 700
 701         if (ret.eax & 0x1)
 702                 interface->capability |= ACER_CAP_BLUETOOTH;
 703
 704         /*
 705          * This appears to be safe to enable, since all Wistron based laptops
 706          * appear to use the same EC register for brightness, even if they
 707          * differ for wireless, etc
 708          */
 709         if (quirks->brightness >= 0)
 710                 interface->capability |= ACER_CAP_BRIGHTNESS;
 711
 712         status = AE_OK;
 713 out:
 714         kfree(out.pointer);
 715         return status;
 716 }
 717
 718 static struct wmi_interface AMW0_interface = {
 719         .type = ACER_AMW0,
 720 };
 721
 722 static struct wmi_interface AMW0_V2_interface = {
 723         .type = ACER_AMW0_V2,
 724 };
 725
 726 /*
 727  * New interface (The WMID interface)
 728  */
 729 static acpi_status
 730 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 731 {
 732         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 733         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 734         union acpi_object *obj;
 735         u32 tmp;
 736         acpi_status status;
 737
 738         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 739
 740         if (ACPI_FAILURE(status))
 741                 return status;
 742
 743         obj = (union acpi_object *) result.pointer;
 744         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 745                 obj->buffer.length == sizeof(u32)) {
 746                 tmp = *((u32 *) obj->buffer.pointer);
 747         } else {
 748                 tmp = 0;
 749         }
 750
 751         if (out)
 752                 *out = tmp;
 753
 754         kfree(result.pointer);
 755
 756         return status;
 757 }
 758
 759 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 760 struct wmi_interface *iface)
 761 {
 762         acpi_status status;
 763         u8 tmp;
 764         u32 result, method_id = 0;
 765
 766         switch (cap) {
 767         case ACER_CAP_WIRELESS:
 768                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 769                 break;
 770         case ACER_CAP_BLUETOOTH:
 771                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 772                 break;
 773         case ACER_CAP_BRIGHTNESS:
 774                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 775                 break;
 776         case ACER_CAP_THREEG:
 777                 method_id = ACER_WMID_GET_THREEG_METHODID;
 778                 break;
 779         case ACER_CAP_MAILLED:
 780                 if (quirks->mailled == 1) {
 781                         ec_read(0x9f, &tmp);
 782                         *value = tmp & 0x1;
 783                         return 0;
 784                 }
 785         default:
 786                 return AE_ERROR;
 787         }
 788         status = WMI_execute_u32(method_id, 0, &result);
 789
 790         if (ACPI_SUCCESS(status))
 791                 *value = (u8)result;
 792
 793         return status;
 794 }
 795
 796 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 797 {
 798         u32 method_id = 0;
 799         char param;
 800
 801         switch (cap) {
 802         case ACER_CAP_BRIGHTNESS:
 803                 if (value > max_brightness)
 804                         return AE_BAD_PARAMETER;
 805                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 806                 break;
 807         case ACER_CAP_WIRELESS:
 808                 if (value > 1)
 809                         return AE_BAD_PARAMETER;
 810                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 811                 break;
 812         case ACER_CAP_BLUETOOTH:
 813                 if (value > 1)
 814                         return AE_BAD_PARAMETER;
 815                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 816                 break;
 817         case ACER_CAP_THREEG:
 818                 if (value > 1)
 819                         return AE_BAD_PARAMETER;
 820                 method_id = ACER_WMID_SET_THREEG_METHODID;
 821                 break;
 822         case ACER_CAP_MAILLED:
 823                 if (value > 1)
 824                         return AE_BAD_PARAMETER;
 825                 if (quirks->mailled == 1) {
 826                         param = value ? 0x92 : 0x93;
 827                         i8042_lock_chip();
 828                         i8042_command(&param, 0x1059);
 829                         i8042_unlock_chip();
 830                         return 0;
 831                 }
 832                 break;
 833         default:
 834                 return AE_ERROR;
 835         }
 836         return WMI_execute_u32(method_id, (u32)value, NULL);
 837 }
 838
 839 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
 840 {
 841         struct hotkey_function_type_aa *type_aa;
 842
 843         /* We are looking for OEM-specific Type AAh */
 844         if (header->type != 0xAA)
 845                 return;
 846
 847         has_type_aa = true;
 848         type_aa = (struct hotkey_function_type_aa *) header;
 849
 850         printk(ACER_INFO "Function bitmap for Communication Button: 0x%x\n",
 851                 type_aa->commun_func_bitmap);
 852
 853         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
 854                 interface->capability |= ACER_CAP_WIRELESS;
 855         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
 856                 interface->capability |= ACER_CAP_THREEG;
 857         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
 858                 interface->capability |= ACER_CAP_BLUETOOTH;
 859 }
 860
 861 static acpi_status WMID_set_capabilities(void)
 862 {
 863         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 864         union acpi_object *obj;
 865         acpi_status status;
 866         u32 devices;
 867
 868         status = wmi_query_block(WMID_GUID2, 1, &out);
 869         if (ACPI_FAILURE(status))
 870                 return status;
 871
 872         obj = (union acpi_object *) out.pointer;
 873         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 874                 obj->buffer.length == sizeof(u32)) {
 875                 devices = *((u32 *) obj->buffer.pointer);
 876         } else {
 877                 kfree(out.pointer);
 878                 return AE_ERROR;
 879         }
 880
 881         dmi_walk(type_aa_dmi_decode, NULL);
 882         if (!has_type_aa) {
 883                 interface->capability |= ACER_CAP_WIRELESS;
 884                 interface->capability |= ACER_CAP_THREEG;
 885                 if (devices & 0x10)
 886                         interface->capability |= ACER_CAP_BLUETOOTH;
 887         }
 888
 889         /* WMID always provides brightness methods */
 890         interface->capability |= ACER_CAP_BRIGHTNESS;
 891
 892         if (!(devices & 0x20))
 893                 max_brightness = 0x9;
 894
 895         kfree(out.pointer);
 896         return status;
 897 }
 898
 899 static struct wmi_interface wmid_interface = {
 900         .type = ACER_WMID,
 901 };
 902
 903 /*
 904  * Generic Device (interface-independent)
 905  */
 906
 907 static acpi_status get_u32(u32 *value, u32 cap)
 908 {
 909         acpi_status status = AE_ERROR;
 910
 911         switch (interface->type) {
 912         case ACER_AMW0:
 913                 status = AMW0_get_u32(value, cap, interface);
 914                 break;
 915         case ACER_AMW0_V2:
 916                 if (cap == ACER_CAP_MAILLED) {
 917                         status = AMW0_get_u32(value, cap, interface);
 918                         break;
 919                 }
 920         case ACER_WMID:
 921                 status = WMID_get_u32(value, cap, interface);
 922                 break;
 923         }
 924
 925         return status;
 926 }
 927
 928 static acpi_status set_u32(u32 value, u32 cap)
 929 {
 930         acpi_status status;
 931
 932         if (interface->capability & cap) {
 933                 switch (interface->type) {
 934                 case ACER_AMW0:
 935                         return AMW0_set_u32(value, cap, interface);
 936                 case ACER_AMW0_V2:
 937                         if (cap == ACER_CAP_MAILLED)
 938                                 return AMW0_set_u32(value, cap, interface);
 939
 940                         /*
 941                          * On some models, some WMID methods don't toggle
 942                          * properly. For those cases, we want to run the AMW0
 943                          * method afterwards to be certain we've really toggled
 944                          * the device state.
 945                          */
 946                         if (cap == ACER_CAP_WIRELESS ||
 947                                 cap == ACER_CAP_BLUETOOTH) {
 948                                 status = WMID_set_u32(value, cap, interface);
 949                                 if (ACPI_FAILURE(status))
 950                                         return status;
 951
 952                                 return AMW0_set_u32(value, cap, interface);
 953                         }
 954                 case ACER_WMID:
 955                         return WMID_set_u32(value, cap, interface);
 956                 default:
 957                         return AE_BAD_PARAMETER;
 958                 }
 959         }
 960         return AE_BAD_PARAMETER;
 961 }
 962
 963 static void __init acer_commandline_init(void)
 964 {
 965         /*
 966          * These will all fail silently if the value given is invalid, or the
 967          * capability isn't available on the given interface
 968          */
 969         set_u32(mailled, ACER_CAP_MAILLED);
 970         if (!has_type_aa)
 971                 set_u32(threeg, ACER_CAP_THREEG);
 972         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 973 }
 974
 975 /*
 976  * LED device (Mail LED only, no other LEDs known yet)
 977  */
 978 static void mail_led_set(struct led_classdev *led_cdev,
 979 enum led_brightness value)
 980 {
 981         set_u32(value, ACER_CAP_MAILLED);
 982 }
 983
 984 static struct led_classdev mail_led = {
 985         .name = "acer-wmi::mail",
 986         .brightness_set = mail_led_set,
 987 };
 988
 989 static int __devinit acer_led_init(struct device *dev)
 990 {
 991         return led_classdev_register(dev, &mail_led);
 992 }
 993
 994 static void acer_led_exit(void)
 995 {
 996         led_classdev_unregister(&mail_led);
 997 }
 998
 999 /*
1000  * Backlight device
1001  */
1002 static struct backlight_device *acer_backlight_device;
1003
1004 static int read_brightness(struct backlight_device *bd)
1005 {
1006         u32 value;
1007         get_u32(&value, ACER_CAP_BRIGHTNESS);
1008         return value;
1009 }
1010
1011 static int update_bl_status(struct backlight_device *bd)
1012 {
1013         int intensity = bd->props.brightness;
1014
1015         if (bd->props.power != FB_BLANK_UNBLANK)
1016                 intensity = 0;
1017         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1018                 intensity = 0;
1019
1020         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1021
1022         return 0;
1023 }
1024
1025 static const struct backlight_ops acer_bl_ops = {
1026         .get_brightness = read_brightness,
1027         .update_status = update_bl_status,
1028 };
1029
1030 static int __devinit acer_backlight_init(struct device *dev)
1031 {
1032         struct backlight_properties props;
1033         struct backlight_device *bd;
1034
1035         memset(&props, 0, sizeof(struct backlight_properties));
1036         props.max_brightness = max_brightness;
1037         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1038                                        &props);
1039         if (IS_ERR(bd)) {
1040                 printk(ACER_ERR "Could not register Acer backlight device\n");
1041                 acer_backlight_device = NULL;
1042                 return PTR_ERR(bd);
1043         }
1044
1045         acer_backlight_device = bd;
1046
1047         bd->props.power = FB_BLANK_UNBLANK;
1048         bd->props.brightness = read_brightness(bd);
1049         backlight_update_status(bd);
1050         return 0;
1051 }
1052
1053 static void acer_backlight_exit(void)
1054 {
1055         backlight_device_unregister(acer_backlight_device);
1056 }
1057
1058 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1059 {
1060         struct wmid3_gds_return_value return_value;
1061         acpi_status status;
1062         union acpi_object *obj;
1063         struct wmid3_gds_input_param params = {
1064                 .function_num = 0x1,
1065                 .hotkey_number = 0x01,
1066                 .devices = device,
1067         };
1068         struct acpi_buffer input = {
1069                 sizeof(struct wmid3_gds_input_param),
1070                 &params
1071         };
1072         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1073
1074         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1075         if (ACPI_FAILURE(status))
1076                 return status;
1077
1078         obj = output.pointer;
1079
1080         if (!obj)
1081                 return AE_ERROR;
1082         else if (obj->type != ACPI_TYPE_BUFFER) {
1083                 kfree(obj);
1084                 return AE_ERROR;
1085         }
1086         if (obj->buffer.length != 8) {
1087                 printk(ACER_WARNING "Unknown buffer length %d\n",
1088                         obj->buffer.length);
1089                 kfree(obj);
1090                 return AE_ERROR;
1091         }
1092
1093         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1094         kfree(obj);
1095
1096         if (return_value.error_code || return_value.ec_return_value)
1097                 printk(ACER_WARNING "Get Device Status failed: "
1098                         "0x%x - 0x%x\n", return_value.error_code,
1099                         return_value.ec_return_value);
1100         else
1101                 *value = !!(return_value.devices & device);
1102
1103         return status;
1104 }
1105
1106 static acpi_status get_device_status(u32 *value, u32 cap)
1107 {
1108         if (wmi_has_guid(WMID_GUID3)) {
1109                 u16 device;
1110
1111                 switch (cap) {
1112                 case ACER_CAP_WIRELESS:
1113                         device = ACER_WMID3_GDS_WIRELESS;
1114                         break;
1115                 case ACER_CAP_BLUETOOTH:
1116                         device = ACER_WMID3_GDS_BLUETOOTH;
1117                         break;
1118                 case ACER_CAP_THREEG:
1119                         device = ACER_WMID3_GDS_THREEG;
1120                         break;
1121                 default:
1122                         return AE_ERROR;
1123                 }
1124                 return wmid3_get_device_status(value, device);
1125
1126         } else {
1127                 return get_u32(value, cap);
1128         }
1129 }
1130
1131 /*
1132  * Rfkill devices
1133  */
1134 static void acer_rfkill_update(struct work_struct *ignored);
1135 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1136 static void acer_rfkill_update(struct work_struct *ignored)
1137 {
1138         u32 state;
1139         acpi_status status;
1140
1141         status = get_u32(&state, ACER_CAP_WIRELESS);
1142         if (ACPI_SUCCESS(status))
1143                 rfkill_set_sw_state(wireless_rfkill, !state);
1144
1145         if (has_cap(ACER_CAP_BLUETOOTH)) {
1146                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1147                 if (ACPI_SUCCESS(status))
1148                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1149         }
1150
1151         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1152                 status = wmid3_get_device_status(&state,
1153                                 ACER_WMID3_GDS_THREEG);
1154                 if (ACPI_SUCCESS(status))
1155                         rfkill_set_sw_state(threeg_rfkill, !state);
1156         }
1157
1158         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1159 }
1160
1161 static int acer_rfkill_set(void *data, bool blocked)
1162 {
1163         acpi_status status;
1164         u32 cap = (unsigned long)data;
1165
1166         if (rfkill_inited) {
1167                 status = set_u32(!blocked, cap);
1168                 if (ACPI_FAILURE(status))
1169                         return -ENODEV;
1170         }
1171
1172         return 0;
1173 }
1174
1175 static const struct rfkill_ops acer_rfkill_ops = {
1176         .set_block = acer_rfkill_set,
1177 };
1178
1179 static struct rfkill *acer_rfkill_register(struct device *dev,
1180                                            enum rfkill_type type,
1181                                            char *name, u32 cap)
1182 {
1183         int err;
1184         struct rfkill *rfkill_dev;
1185         u32 state;
1186         acpi_status status;
1187
1188         rfkill_dev = rfkill_alloc(name, dev, type,
1189                                   &acer_rfkill_ops,
1190                                   (void *)(unsigned long)cap);
1191         if (!rfkill_dev)
1192                 return ERR_PTR(-ENOMEM);
1193
1194         status = get_device_status(&state, cap);
1195
1196         err = rfkill_register(rfkill_dev);
1197         if (err) {
1198                 rfkill_destroy(rfkill_dev);
1199                 return ERR_PTR(err);
1200         }
1201
1202         if (ACPI_SUCCESS(status))
1203                 rfkill_set_sw_state(rfkill_dev, !state);
1204
1205         return rfkill_dev;
1206 }
1207
1208 static int acer_rfkill_init(struct device *dev)
1209 {
1210         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1211                 "acer-wireless", ACER_CAP_WIRELESS);
1212         if (IS_ERR(wireless_rfkill))
1213                 return PTR_ERR(wireless_rfkill);
1214
1215         if (has_cap(ACER_CAP_BLUETOOTH)) {
1216                 bluetooth_rfkill = acer_rfkill_register(dev,
1217                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1218                         ACER_CAP_BLUETOOTH);
1219                 if (IS_ERR(bluetooth_rfkill)) {
1220                         rfkill_unregister(wireless_rfkill);
1221                         rfkill_destroy(wireless_rfkill);
1222                         return PTR_ERR(bluetooth_rfkill);
1223                 }
1224         }
1225
1226         if (has_cap(ACER_CAP_THREEG)) {
1227                 threeg_rfkill = acer_rfkill_register(dev,
1228                         RFKILL_TYPE_WWAN, "acer-threeg",
1229                         ACER_CAP_THREEG);
1230                 if (IS_ERR(threeg_rfkill)) {
1231                         rfkill_unregister(wireless_rfkill);
1232                         rfkill_destroy(wireless_rfkill);
1233                         rfkill_unregister(bluetooth_rfkill);
1234                         rfkill_destroy(bluetooth_rfkill);
1235                         return PTR_ERR(threeg_rfkill);
1236                 }
1237         }
1238
1239         rfkill_inited = true;
1240
1241         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1242                 schedule_delayed_work(&acer_rfkill_work,
1243                         round_jiffies_relative(HZ));
1244
1245         return 0;
1246 }
1247
1248 static void acer_rfkill_exit(void)
1249 {
1250         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1251                 cancel_delayed_work_sync(&acer_rfkill_work);
1252
1253         rfkill_unregister(wireless_rfkill);
1254         rfkill_destroy(wireless_rfkill);
1255
1256         if (has_cap(ACER_CAP_BLUETOOTH)) {
1257                 rfkill_unregister(bluetooth_rfkill);
1258                 rfkill_destroy(bluetooth_rfkill);
1259         }
1260
1261         if (has_cap(ACER_CAP_THREEG)) {
1262                 rfkill_unregister(threeg_rfkill);
1263                 rfkill_destroy(threeg_rfkill);
1264         }
1265         return;
1266 }
1267
1268 /*
1269  * sysfs interface
1270  */
1271 static ssize_t show_bool_threeg(struct device *dev,
1272         struct device_attribute *attr, char *buf)
1273 {
1274         u32 result; \
1275         acpi_status status;
1276         if (wmi_has_guid(WMID_GUID3))
1277                 status = wmid3_get_device_status(&result,
1278                                 ACER_WMID3_GDS_THREEG);
1279         else
1280                 status = get_u32(&result, ACER_CAP_THREEG);
1281         if (ACPI_SUCCESS(status))
1282                 return sprintf(buf, "%u\n", result);
1283         return sprintf(buf, "Read error\n");
1284 }
1285
1286 static ssize_t set_bool_threeg(struct device *dev,
1287         struct device_attribute *attr, const char *buf, size_t count)
1288 {
1289         u32 tmp = simple_strtoul(buf, NULL, 10);
1290         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1291                 if (ACPI_FAILURE(status))
1292                         return -EINVAL;
1293         return count;
1294 }
1295 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1296         set_bool_threeg);
1297
1298 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1299         char *buf)
1300 {
1301         switch (interface->type) {
1302         case ACER_AMW0:
1303                 return sprintf(buf, "AMW0\n");
1304         case ACER_AMW0_V2:
1305                 return sprintf(buf, "AMW0 v2\n");
1306         case ACER_WMID:
1307                 return sprintf(buf, "WMID\n");
1308         default:
1309                 return sprintf(buf, "Error!\n");
1310         }
1311 }
1312
1313 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1314
1315 static void acer_wmi_notify(u32 value, void *context)
1316 {
1317         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1318         union acpi_object *obj;
1319         struct event_return_value return_value;
1320         acpi_status status;
1321
1322         status = wmi_get_event_data(value, &response);
1323         if (status != AE_OK) {
1324                 printk(ACER_WARNING "bad event status 0x%x\n", status);
1325                 return;
1326         }
1327
1328         obj = (union acpi_object *)response.pointer;
1329
1330         if (!obj)
1331                 return;
1332         if (obj->type != ACPI_TYPE_BUFFER) {
1333                 printk(ACER_WARNING "Unknown response received %d\n",
1334                         obj->type);
1335                 kfree(obj);
1336                 return;
1337         }
1338         if (obj->buffer.length != 8) {
1339                 printk(ACER_WARNING "Unknown buffer length %d\n",
1340                         obj->buffer.length);
1341                 kfree(obj);
1342                 return;
1343         }
1344
1345         return_value = *((struct event_return_value *)obj->buffer.pointer);
1346         kfree(obj);
1347
1348         switch (return_value.function) {
1349         case WMID_HOTKEY_EVENT:
1350                 if (return_value.device_state) {
1351                         u16 device_state = return_value.device_state;
1352                         pr_debug("deivces states: 0x%x\n", device_state);
1353                         if (has_cap(ACER_CAP_WIRELESS))
1354                                 rfkill_set_sw_state(wireless_rfkill,
1355                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1356                         if (has_cap(ACER_CAP_BLUETOOTH))
1357                                 rfkill_set_sw_state(bluetooth_rfkill,
1358                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1359                         if (has_cap(ACER_CAP_THREEG))
1360                                 rfkill_set_sw_state(threeg_rfkill,
1361                                 !(device_state & ACER_WMID3_GDS_THREEG));
1362                 }
1363                 if (!sparse_keymap_report_event(acer_wmi_input_dev,
1364                                 return_value.key_num, 1, true))
1365                         printk(ACER_WARNING "Unknown key number - 0x%x\n",
1366                                 return_value.key_num);
1367                 break;
1368         default:
1369                 printk(ACER_WARNING "Unknown function number - %d - %d\n",
1370                         return_value.function, return_value.key_num);
1371                 break;
1372         }
1373 }
1374
1375 static acpi_status
1376 wmid3_set_lm_mode(struct lm_input_params *params,
1377                   struct lm_return_value *return_value)
1378 {
1379         acpi_status status;
1380         union acpi_object *obj;
1381
1382         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1383         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1384
1385         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1386         if (ACPI_FAILURE(status))
1387                 return status;
1388
1389         obj = output.pointer;
1390
1391         if (!obj)
1392                 return AE_ERROR;
1393         else if (obj->type != ACPI_TYPE_BUFFER) {
1394                 kfree(obj);
1395                 return AE_ERROR;
1396         }
1397         if (obj->buffer.length != 4) {
1398                 printk(ACER_WARNING "Unknown buffer length %d\n",
1399                        obj->buffer.length);
1400                 kfree(obj);
1401                 return AE_ERROR;
1402         }
1403
1404         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1405         kfree(obj);
1406
1407         return status;
1408 }
1409
1410 static int acer_wmi_enable_ec_raw(void)
1411 {
1412         struct lm_return_value return_value;
1413         acpi_status status;
1414         struct lm_input_params params = {
1415                 .function_num = 0x1,
1416                 .commun_devices = 0xFFFF,
1417                 .devices = 0xFFFF,
1418                 .lm_status = 0x00,            /* Launch Manager Deactive */
1419         };
1420
1421         status = wmid3_set_lm_mode(&params, &return_value);
1422
1423         if (return_value.error_code || return_value.ec_return_value)
1424                 printk(ACER_WARNING "Enabling EC raw mode failed: "
1425                        "0x%x - 0x%x\n", return_value.error_code,
1426                        return_value.ec_return_value);
1427         else
1428                 printk(ACER_INFO "Enabled EC raw mode");
1429
1430         return status;
1431 }
1432
1433 static int acer_wmi_enable_lm(void)
1434 {
1435         struct lm_return_value return_value;
1436         acpi_status status;
1437         struct lm_input_params params = {
1438                 .function_num = 0x1,
1439                 .commun_devices = 0xFFFF,
1440                 .devices = 0xFFFF,
1441                 .lm_status = 0x01,            /* Launch Manager Active */
1442         };
1443
1444         status = wmid3_set_lm_mode(&params, &return_value);
1445
1446         if (return_value.error_code || return_value.ec_return_value)
1447                 printk(ACER_WARNING "Enabling Launch Manager failed: "
1448                        "0x%x - 0x%x\n", return_value.error_code,
1449                        return_value.ec_return_value);
1450
1451         return status;
1452 }
1453
1454 static int __init acer_wmi_input_setup(void)
1455 {
1456         acpi_status status;
1457         int err;
1458
1459         acer_wmi_input_dev = input_allocate_device();
1460         if (!acer_wmi_input_dev)
1461                 return -ENOMEM;
1462
1463         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1464         acer_wmi_input_dev->phys = "wmi/input0";
1465         acer_wmi_input_dev->id.bustype = BUS_HOST;
1466
1467         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1468         if (err)
1469                 goto err_free_dev;
1470
1471         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1472                                                 acer_wmi_notify, NULL);
1473         if (ACPI_FAILURE(status)) {
1474                 err = -EIO;
1475                 goto err_free_keymap;
1476         }
1477
1478         err = input_register_device(acer_wmi_input_dev);
1479         if (err)
1480                 goto err_uninstall_notifier;
1481
1482         return 0;
1483
1484 err_uninstall_notifier:
1485         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1486 err_free_keymap:
1487         sparse_keymap_free(acer_wmi_input_dev);
1488 err_free_dev:
1489         input_free_device(acer_wmi_input_dev);
1490         return err;
1491 }
1492
1493 static void acer_wmi_input_destroy(void)
1494 {
1495         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1496         sparse_keymap_free(acer_wmi_input_dev);
1497         input_unregister_device(acer_wmi_input_dev);
1498 }
1499
1500 /*
1501  * debugfs functions
1502  */
1503 static u32 get_wmid_devices(void)
1504 {
1505         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1506         union acpi_object *obj;
1507         acpi_status status;
1508         u32 devices = 0;
1509
1510         status = wmi_query_block(WMID_GUID2, 1, &out);
1511         if (ACPI_FAILURE(status))
1512                 return 0;
1513
1514         obj = (union acpi_object *) out.pointer;
1515         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1516                 obj->buffer.length == sizeof(u32)) {
1517                 devices = *((u32 *) obj->buffer.pointer);
1518         }
1519
1520         kfree(out.pointer);
1521         return devices;
1522 }
1523
1524 /*
1525  * Platform device
1526  */
1527 static int __devinit acer_platform_probe(struct platform_device *device)
1528 {
1529         int err;
1530
1531         if (has_cap(ACER_CAP_MAILLED)) {
1532                 err = acer_led_init(&device->dev);
1533                 if (err)
1534                         goto error_mailled;
1535         }
1536
1537         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1538                 err = acer_backlight_init(&device->dev);
1539                 if (err)
1540                         goto error_brightness;
1541         }
1542
1543         err = acer_rfkill_init(&device->dev);
1544         if (err)
1545                 goto error_rfkill;
1546
1547         return err;
1548
1549 error_rfkill:
1550         if (has_cap(ACER_CAP_BRIGHTNESS))
1551                 acer_backlight_exit();
1552 error_brightness:
1553         if (has_cap(ACER_CAP_MAILLED))
1554                 acer_led_exit();
1555 error_mailled:
1556         return err;
1557 }
1558
1559 static int acer_platform_remove(struct platform_device *device)
1560 {
1561         if (has_cap(ACER_CAP_MAILLED))
1562                 acer_led_exit();
1563         if (has_cap(ACER_CAP_BRIGHTNESS))
1564                 acer_backlight_exit();
1565
1566         acer_rfkill_exit();
1567         return 0;
1568 }
1569
1570 static int acer_platform_suspend(struct platform_device *dev,
1571 pm_message_t state)
1572 {
1573         u32 value;
1574         struct acer_data *data = &interface->data;
1575
1576         if (!data)
1577                 return -ENOMEM;
1578
1579         if (has_cap(ACER_CAP_MAILLED)) {
1580                 get_u32(&value, ACER_CAP_MAILLED);
1581                 data->mailled = value;
1582         }
1583
1584         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1585                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1586                 data->brightness = value;
1587         }
1588
1589         return 0;
1590 }
1591
1592 static int acer_platform_resume(struct platform_device *device)
1593 {
1594         struct acer_data *data = &interface->data;
1595
1596         if (!data)
1597                 return -ENOMEM;
1598
1599         if (has_cap(ACER_CAP_MAILLED))
1600                 set_u32(data->mailled, ACER_CAP_MAILLED);
1601
1602         if (has_cap(ACER_CAP_BRIGHTNESS))
1603                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1604
1605         return 0;
1606 }
1607
1608 static struct platform_driver acer_platform_driver = {
1609         .driver = {
1610                 .name = "acer-wmi",
1611                 .owner = THIS_MODULE,
1612         },
1613         .probe = acer_platform_probe,
1614         .remove = acer_platform_remove,
1615         .suspend = acer_platform_suspend,
1616         .resume = acer_platform_resume,
1617 };
1618
1619 static struct platform_device *acer_platform_device;
1620
1621 static int remove_sysfs(struct platform_device *device)
1622 {
1623         if (has_cap(ACER_CAP_THREEG))
1624                 device_remove_file(&device->dev, &dev_attr_threeg);
1625
1626         device_remove_file(&device->dev, &dev_attr_interface);
1627
1628         return 0;
1629 }
1630
1631 static int create_sysfs(void)
1632 {
1633         int retval = -ENOMEM;
1634
1635         if (has_cap(ACER_CAP_THREEG)) {
1636                 retval = device_create_file(&acer_platform_device->dev,
1637                         &dev_attr_threeg);
1638                 if (retval)
1639                         goto error_sysfs;
1640         }
1641
1642         retval = device_create_file(&acer_platform_device->dev,
1643                 &dev_attr_interface);
1644         if (retval)
1645                 goto error_sysfs;
1646
1647         return 0;
1648
1649 error_sysfs:
1650                 remove_sysfs(acer_platform_device);
1651         return retval;
1652 }
1653
1654 static void remove_debugfs(void)
1655 {
1656         debugfs_remove(interface->debug.devices);
1657         debugfs_remove(interface->debug.root);
1658 }
1659
1660 static int create_debugfs(void)
1661 {
1662         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1663         if (!interface->debug.root) {
1664                 printk(ACER_ERR "Failed to create debugfs directory");
1665                 return -ENOMEM;
1666         }
1667
1668         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1669                                         interface->debug.root,
1670                                         &interface->debug.wmid_devices);
1671         if (!interface->debug.devices)
1672                 goto error_debugfs;
1673
1674         return 0;
1675
1676 error_debugfs:
1677         remove_debugfs();
1678         return -ENOMEM;
1679 }
1680
1681 static int __init acer_wmi_init(void)
1682 {
1683         int err;
1684
1685         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1686
1687         if (dmi_check_system(acer_blacklist)) {
1688                 printk(ACER_INFO "Blacklisted hardware detected - "
1689                                 "not loading\n");
1690                 return -ENODEV;
1691         }
1692
1693         find_quirks();
1694
1695         /*
1696          * Detect which ACPI-WMI interface we're using.
1697          */
1698         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1699                 interface = &AMW0_V2_interface;
1700
1701         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1702                 interface = &wmid_interface;
1703
1704         if (wmi_has_guid(WMID_GUID2) && interface) {
1705                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1706                         printk(ACER_ERR "Unable to detect available WMID "
1707                                         "devices\n");
1708                         return -ENODEV;
1709                 }
1710         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1711                 printk(ACER_ERR "No WMID device detection method found\n");
1712                 return -ENODEV;
1713         }
1714
1715         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1716                 interface = &AMW0_interface;
1717
1718                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1719                         printk(ACER_ERR "Unable to detect available AMW0 "
1720                                         "devices\n");
1721                         return -ENODEV;
1722                 }
1723         }
1724
1725         if (wmi_has_guid(AMW0_GUID1))
1726                 AMW0_find_mailled();
1727
1728         if (!interface) {
1729                 printk(ACER_INFO "No or unsupported WMI interface, unable to "
1730                                 "load\n");
1731                 return -ENODEV;
1732         }
1733
1734         set_quirks();
1735
1736         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1737                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1738                 printk(ACER_INFO "Brightness must be controlled by "
1739                        "generic video driver\n");
1740         }
1741
1742         if (wmi_has_guid(WMID_GUID3)) {
1743                 if (ec_raw_mode) {
1744                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1745                                 printk(ACER_ERR "Cannot enable EC raw mode\n");
1746                                 return -ENODEV;
1747                         }
1748                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1749                         printk(ACER_ERR "Cannot enable Launch Manager mode\n");
1750                         return -ENODEV;
1751                 }
1752         } else if (ec_raw_mode) {
1753                 printk(ACER_INFO "No WMID EC raw mode enable method\n");
1754         }
1755
1756         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1757                 err = acer_wmi_input_setup();
1758                 if (err)
1759                         return err;
1760         }
1761
1762         err = platform_driver_register(&acer_platform_driver);
1763         if (err) {
1764                 printk(ACER_ERR "Unable to register platform driver.\n");
1765                 goto error_platform_register;
1766         }
1767
1768         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1769         if (!acer_platform_device) {
1770                 err = -ENOMEM;
1771                 goto error_device_alloc;
1772         }
1773
1774         err = platform_device_add(acer_platform_device);
1775         if (err)
1776                 goto error_device_add;
1777
1778         err = create_sysfs();
1779         if (err)
1780                 goto error_create_sys;
1781
1782         if (wmi_has_guid(WMID_GUID2)) {
1783                 interface->debug.wmid_devices = get_wmid_devices();
1784                 err = create_debugfs();
1785                 if (err)
1786                         goto error_create_debugfs;
1787         }
1788
1789         /* Override any initial settings with values from the commandline */
1790         acer_commandline_init();
1791
1792         return 0;
1793
1794 error_create_debugfs:
1795         remove_sysfs(acer_platform_device);
1796 error_create_sys:
1797         platform_device_del(acer_platform_device);
1798 error_device_add:
1799         platform_device_put(acer_platform_device);
1800 error_device_alloc:
1801         platform_driver_unregister(&acer_platform_driver);
1802 error_platform_register:
1803         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1804                 acer_wmi_input_destroy();
1805
1806         return err;
1807 }
1808
1809 static void __exit acer_wmi_exit(void)
1810 {
1811         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1812                 acer_wmi_input_destroy();
1813
1814         remove_sysfs(acer_platform_device);
1815         remove_debugfs();
1816         platform_device_unregister(acer_platform_device);
1817         platform_driver_unregister(&acer_platform_driver);
1818
1819         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1820         return;
1821 }
1822
1823 module_init(acer_wmi_init);
1824 module_exit(acer_wmi_exit);