drivers/platform/x86/acer-wmi.c

   1 /*
   2  *  Acer WMI Laptop Extras
   3  *
   4  *  Copyright (C) 2007-2009     Carlos Corbacho <carlos@strangeworlds.co.uk>
   5  *
   6  *  Based on acer_acpi:
   7  *    Copyright (C) 2005-2007   E.M. Smith
   8  *    Copyright (C) 2007-2008   Carlos Corbacho <cathectic@gmail.com>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  26
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/init.h>
  30 #include <linux/types.h>
  31 #include <linux/dmi.h>
  32 #include <linux/fb.h>
  33 #include <linux/backlight.h>
  34 #include <linux/leds.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/acpi.h>
  37 #include <linux/i8042.h>
  38 #include <linux/rfkill.h>
  39 #include <linux/workqueue.h>
  40 #include <linux/debugfs.h>
  41 #include <linux/slab.h>
  42 #include <linux/input.h>
  43 #include <linux/input/sparse-keymap.h>
  44
  45 #include <acpi/acpi_drivers.h>
  46
  47 MODULE_AUTHOR("Carlos Corbacho");
  48 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  49 MODULE_LICENSE("GPL");
  50
  51 /*
  52  * Magic Number
  53  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  54  * (it's also used in acerhk when directly accessing the BIOS)
  55  */
  56 #define ACER_AMW0_WRITE 0x9610
  57
  58 /*
  59  * Bit masks for the AMW0 interface
  60  */
  61 #define ACER_AMW0_WIRELESS_MASK  0x35
  62 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  63 #define ACER_AMW0_MAILLED_MASK   0x31
  64
  65 /*
  66  * Method IDs for WMID interface
  67  */
  68 #define ACER_WMID_GET_WIRELESS_METHODID         1
  69 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  70 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  71 #define ACER_WMID_SET_WIRELESS_METHODID         4
  72 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  73 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  74 #define ACER_WMID_GET_THREEG_METHODID           10
  75 #define ACER_WMID_SET_THREEG_METHODID           11
  76
  77 /*
  78  * Acer ACPI method GUIDs
  79  */
  80 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  81 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  82 #define WMID_GUID1              "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
  83 #define WMID_GUID2              "95764E09-FB56-4E83-B31A-37761F60994A"
  84 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
  85
  86 /*
  87  * Acer ACPI event GUIDs
  88  */
  89 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
  90
  91 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  92 MODULE_ALIAS("wmi:6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3");
  93 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
  94
  95 enum acer_wmi_event_ids {
  96         WMID_HOTKEY_EVENT = 0x1,
  97 };
  98
  99 static const struct key_entry acer_wmi_keymap[] = {
 100         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
 101         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
 102         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
 103         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
 104         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
 105         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
 106         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
 107         {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad On/Off */
 108         {KE_END, 0}
 109 };
 110
 111 static struct input_dev *acer_wmi_input_dev;
 112
 113 struct event_return_value {
 114         u8 function;
 115         u8 key_num;
 116         u16 device_state;
 117         u32 reserved;
 118 } __attribute__((packed));
 119
 120 /*
 121  * GUID3 Get Device Status device flags
 122  */
 123 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
 124 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
 125 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
 126
 127 struct lm_input_params {
 128         u8 function_num;        /* Function Number */
 129         u16 commun_devices;     /* Communication type devices default status */
 130         u16 devices;            /* Other type devices default status */
 131         u8 lm_status;           /* Launch Manager Status */
 132         u16 reserved;
 133 } __attribute__((packed));
 134
 135 struct lm_return_value {
 136         u8 error_code;          /* Error Code */
 137         u8 ec_return_value;     /* EC Return Value */
 138         u16 reserved;
 139 } __attribute__((packed));
 140
 141 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
 142         u8 function_num;        /* Function Number */
 143         u8 hotkey_number;       /* Hotkey Number */
 144         u16 devices;            /* Get Device */
 145 } __attribute__((packed));
 146
 147 struct wmid3_gds_return_value { /* Get Device Status return value*/
 148         u8 error_code;          /* Error Code */
 149         u8 ec_return_value;     /* EC Return Value */
 150         u16 devices;            /* Current Device Status */
 151         u32 reserved;
 152 } __attribute__((packed));
 153
 154 struct hotkey_function_type_aa {
 155         u8 type;
 156         u8 length;
 157         u16 handle;
 158         u16 commun_func_bitmap;
 159 } __attribute__((packed));
 160
 161 /*
 162  * Interface capability flags
 163  */
 164 #define ACER_CAP_MAILLED                (1<<0)
 165 #define ACER_CAP_WIRELESS               (1<<1)
 166 #define ACER_CAP_BLUETOOTH              (1<<2)
 167 #define ACER_CAP_BRIGHTNESS             (1<<3)
 168 #define ACER_CAP_THREEG                 (1<<4)
 169 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 170
 171 /*
 172  * Interface type flags
 173  */
 174 enum interface_flags {
 175         ACER_AMW0,
 176         ACER_AMW0_V2,
 177         ACER_WMID,
 178 };
 179
 180 #define ACER_DEFAULT_WIRELESS  0
 181 #define ACER_DEFAULT_BLUETOOTH 0
 182 #define ACER_DEFAULT_MAILLED   0
 183 #define ACER_DEFAULT_THREEG    0
 184
 185 static int max_brightness = 0xF;
 186
 187 static int mailled = -1;
 188 static int brightness = -1;
 189 static int threeg = -1;
 190 static int force_series;
 191 static bool ec_raw_mode;
 192 static bool has_type_aa;
 193
 194 module_param(mailled, int, 0444);
 195 module_param(brightness, int, 0444);
 196 module_param(threeg, int, 0444);
 197 module_param(force_series, int, 0444);
 198 module_param(ec_raw_mode, bool, 0444);
 199 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 200 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 201 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 202 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 203 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
 204
 205 struct acer_data {
 206         int mailled;
 207         int threeg;
 208         int brightness;
 209 };
 210
 211 struct acer_debug {
 212         struct dentry *root;
 213         struct dentry *devices;
 214         u32 wmid_devices;
 215 };
 216
 217 static struct rfkill *wireless_rfkill;
 218 static struct rfkill *bluetooth_rfkill;
 219 static struct rfkill *threeg_rfkill;
 220 static bool rfkill_inited;
 221
 222 /* Each low-level interface must define at least some of the following */
 223 struct wmi_interface {
 224         /* The WMI device type */
 225         u32 type;
 226
 227         /* The capabilities this interface provides */
 228         u32 capability;
 229
 230         /* Private data for the current interface */
 231         struct acer_data data;
 232
 233         /* debugfs entries associated with this interface */
 234         struct acer_debug debug;
 235 };
 236
 237 /* The static interface pointer, points to the currently detected interface */
 238 static struct wmi_interface *interface;
 239
 240 /*
 241  * Embedded Controller quirks
 242  * Some laptops require us to directly access the EC to either enable or query
 243  * features that are not available through WMI.
 244  */
 245
 246 struct quirk_entry {
 247         u8 wireless;
 248         u8 mailled;
 249         s8 brightness;
 250         u8 bluetooth;
 251 };
 252
 253 static struct quirk_entry *quirks;
 254
 255 static void set_quirks(void)
 256 {
 257         if (!interface)
 258                 return;
 259
 260         if (quirks->mailled)
 261                 interface->capability |= ACER_CAP_MAILLED;
 262
 263         if (quirks->brightness)
 264                 interface->capability |= ACER_CAP_BRIGHTNESS;
 265 }
 266
 267 static int dmi_matched(const struct dmi_system_id *dmi)
 268 {
 269         quirks = dmi->driver_data;
 270         return 1;
 271 }
 272
 273 static struct quirk_entry quirk_unknown = {
 274 };
 275
 276 static struct quirk_entry quirk_acer_aspire_1520 = {
 277         .brightness = -1,
 278 };
 279
 280 static struct quirk_entry quirk_acer_travelmate_2490 = {
 281         .mailled = 1,
 282 };
 283
 284 /* This AMW0 laptop has no bluetooth */
 285 static struct quirk_entry quirk_medion_md_98300 = {
 286         .wireless = 1,
 287 };
 288
 289 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 290         .wireless = 2,
 291 };
 292
 293 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 294 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 295         {
 296                 .ident = "Acer Aspire One (SSD)",
 297                 .matches = {
 298                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 299                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 300                 },
 301         },
 302         {
 303                 .ident = "Acer Aspire One (HDD)",
 304                 .matches = {
 305                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 306                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 307                 },
 308         },
 309         {}
 310 };
 311
 312 static struct dmi_system_id acer_quirks[] = {
 313         {
 314                 .callback = dmi_matched,
 315                 .ident = "Acer Aspire 1360",
 316                 .matches = {
 317                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 318                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 319                 },
 320                 .driver_data = &quirk_acer_aspire_1520,
 321         },
 322         {
 323                 .callback = dmi_matched,
 324                 .ident = "Acer Aspire 1520",
 325                 .matches = {
 326                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 327                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 328                 },
 329                 .driver_data = &quirk_acer_aspire_1520,
 330         },
 331         {
 332                 .callback = dmi_matched,
 333                 .ident = "Acer Aspire 3100",
 334                 .matches = {
 335                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 336                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 337                 },
 338                 .driver_data = &quirk_acer_travelmate_2490,
 339         },
 340         {
 341                 .callback = dmi_matched,
 342                 .ident = "Acer Aspire 3610",
 343                 .matches = {
 344                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 345                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 346                 },
 347                 .driver_data = &quirk_acer_travelmate_2490,
 348         },
 349         {
 350                 .callback = dmi_matched,
 351                 .ident = "Acer Aspire 5100",
 352                 .matches = {
 353                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 354                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 355                 },
 356                 .driver_data = &quirk_acer_travelmate_2490,
 357         },
 358         {
 359                 .callback = dmi_matched,
 360                 .ident = "Acer Aspire 5610",
 361                 .matches = {
 362                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 363                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 364                 },
 365                 .driver_data = &quirk_acer_travelmate_2490,
 366         },
 367         {
 368                 .callback = dmi_matched,
 369                 .ident = "Acer Aspire 5630",
 370                 .matches = {
 371                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 372                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 373                 },
 374                 .driver_data = &quirk_acer_travelmate_2490,
 375         },
 376         {
 377                 .callback = dmi_matched,
 378                 .ident = "Acer Aspire 5650",
 379                 .matches = {
 380                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 381                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 382                 },
 383                 .driver_data = &quirk_acer_travelmate_2490,
 384         },
 385         {
 386                 .callback = dmi_matched,
 387                 .ident = "Acer Aspire 5680",
 388                 .matches = {
 389                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 390                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 391                 },
 392                 .driver_data = &quirk_acer_travelmate_2490,
 393         },
 394         {
 395                 .callback = dmi_matched,
 396                 .ident = "Acer Aspire 9110",
 397                 .matches = {
 398                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 399                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 400                 },
 401                 .driver_data = &quirk_acer_travelmate_2490,
 402         },
 403         {
 404                 .callback = dmi_matched,
 405                 .ident = "Acer TravelMate 2490",
 406                 .matches = {
 407                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 408                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 409                 },
 410                 .driver_data = &quirk_acer_travelmate_2490,
 411         },
 412         {
 413                 .callback = dmi_matched,
 414                 .ident = "Acer TravelMate 4200",
 415                 .matches = {
 416                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 417                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 418                 },
 419                 .driver_data = &quirk_acer_travelmate_2490,
 420         },
 421         {
 422                 .callback = dmi_matched,
 423                 .ident = "Fujitsu Siemens Amilo Li 1718",
 424                 .matches = {
 425                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 426                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 427                 },
 428                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 429         },
 430         {
 431                 .callback = dmi_matched,
 432                 .ident = "Medion MD 98300",
 433                 .matches = {
 434                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 435                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 436                 },
 437                 .driver_data = &quirk_medion_md_98300,
 438         },
 439         {}
 440 };
 441
 442 /* Find which quirks are needed for a particular vendor/ model pair */
 443 static void find_quirks(void)
 444 {
 445         if (!force_series) {
 446                 dmi_check_system(acer_quirks);
 447         } else if (force_series == 2490) {
 448                 quirks = &quirk_acer_travelmate_2490;
 449         }
 450
 451         if (quirks == NULL)
 452                 quirks = &quirk_unknown;
 453
 454         set_quirks();
 455 }
 456
 457 /*
 458  * General interface convenience methods
 459  */
 460
 461 static bool has_cap(u32 cap)
 462 {
 463         if ((interface->capability & cap) != 0)
 464                 return 1;
 465
 466         return 0;
 467 }
 468
 469 /*
 470  * AMW0 (V1) interface
 471  */
 472 struct wmab_args {
 473         u32 eax;
 474         u32 ebx;
 475         u32 ecx;
 476         u32 edx;
 477 };
 478
 479 struct wmab_ret {
 480         u32 eax;
 481         u32 ebx;
 482         u32 ecx;
 483         u32 edx;
 484         u32 eex;
 485 };
 486
 487 static acpi_status wmab_execute(struct wmab_args *regbuf,
 488 struct acpi_buffer *result)
 489 {
 490         struct acpi_buffer input;
 491         acpi_status status;
 492         input.length = sizeof(struct wmab_args);
 493         input.pointer = (u8 *)regbuf;
 494
 495         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 496
 497         return status;
 498 }
 499
 500 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 501 struct wmi_interface *iface)
 502 {
 503         int err;
 504         u8 result;
 505
 506         switch (cap) {
 507         case ACER_CAP_MAILLED:
 508                 switch (quirks->mailled) {
 509                 default:
 510                         err = ec_read(0xA, &result);
 511                         if (err)
 512                                 return AE_ERROR;
 513                         *value = (result >> 7) & 0x1;
 514                         return AE_OK;
 515                 }
 516                 break;
 517         case ACER_CAP_WIRELESS:
 518                 switch (quirks->wireless) {
 519                 case 1:
 520                         err = ec_read(0x7B, &result);
 521                         if (err)
 522                                 return AE_ERROR;
 523                         *value = result & 0x1;
 524                         return AE_OK;
 525                 case 2:
 526                         err = ec_read(0x71, &result);
 527                         if (err)
 528                                 return AE_ERROR;
 529                         *value = result & 0x1;
 530                         return AE_OK;
 531                 default:
 532                         err = ec_read(0xA, &result);
 533                         if (err)
 534                                 return AE_ERROR;
 535                         *value = (result >> 2) & 0x1;
 536                         return AE_OK;
 537                 }
 538                 break;
 539         case ACER_CAP_BLUETOOTH:
 540                 switch (quirks->bluetooth) {
 541                 default:
 542                         err = ec_read(0xA, &result);
 543                         if (err)
 544                                 return AE_ERROR;
 545                         *value = (result >> 4) & 0x1;
 546                         return AE_OK;
 547                 }
 548                 break;
 549         case ACER_CAP_BRIGHTNESS:
 550                 switch (quirks->brightness) {
 551                 default:
 552                         err = ec_read(0x83, &result);
 553                         if (err)
 554                                 return AE_ERROR;
 555                         *value = result;
 556                         return AE_OK;
 557                 }
 558                 break;
 559         default:
 560                 return AE_ERROR;
 561         }
 562         return AE_OK;
 563 }
 564
 565 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 566 {
 567         struct wmab_args args;
 568
 569         args.eax = ACER_AMW0_WRITE;
 570         args.ebx = value ? (1<<8) : 0;
 571         args.ecx = args.edx = 0;
 572
 573         switch (cap) {
 574         case ACER_CAP_MAILLED:
 575                 if (value > 1)
 576                         return AE_BAD_PARAMETER;
 577                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 578                 break;
 579         case ACER_CAP_WIRELESS:
 580                 if (value > 1)
 581                         return AE_BAD_PARAMETER;
 582                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 583                 break;
 584         case ACER_CAP_BLUETOOTH:
 585                 if (value > 1)
 586                         return AE_BAD_PARAMETER;
 587                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 588                 break;
 589         case ACER_CAP_BRIGHTNESS:
 590                 if (value > max_brightness)
 591                         return AE_BAD_PARAMETER;
 592                 switch (quirks->brightness) {
 593                 default:
 594                         return ec_write(0x83, value);
 595                         break;
 596                 }
 597         default:
 598                 return AE_ERROR;
 599         }
 600
 601         /* Actually do the set */
 602         return wmab_execute(&args, NULL);
 603 }
 604
 605 static acpi_status AMW0_find_mailled(void)
 606 {
 607         struct wmab_args args;
 608         struct wmab_ret ret;
 609         acpi_status status = AE_OK;
 610         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 611         union acpi_object *obj;
 612
 613         args.eax = 0x86;
 614         args.ebx = args.ecx = args.edx = 0;
 615
 616         status = wmab_execute(&args, &out);
 617         if (ACPI_FAILURE(status))
 618                 return status;
 619
 620         obj = (union acpi_object *) out.pointer;
 621         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 622         obj->buffer.length == sizeof(struct wmab_ret)) {
 623                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 624         } else {
 625                 kfree(out.pointer);
 626                 return AE_ERROR;
 627         }
 628
 629         if (ret.eex & 0x1)
 630                 interface->capability |= ACER_CAP_MAILLED;
 631
 632         kfree(out.pointer);
 633
 634         return AE_OK;
 635 }
 636
 637 static acpi_status AMW0_set_capabilities(void)
 638 {
 639         struct wmab_args args;
 640         struct wmab_ret ret;
 641         acpi_status status;
 642         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 643         union acpi_object *obj;
 644
 645         /*
 646          * On laptops with this strange GUID (non Acer), normal probing doesn't
 647          * work.
 648          */
 649         if (wmi_has_guid(AMW0_GUID2)) {
 650                 interface->capability |= ACER_CAP_WIRELESS;
 651                 return AE_OK;
 652         }
 653
 654         args.eax = ACER_AMW0_WRITE;
 655         args.ecx = args.edx = 0;
 656
 657         args.ebx = 0xa2 << 8;
 658         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 659
 660         status = wmab_execute(&args, &out);
 661         if (ACPI_FAILURE(status))
 662                 return status;
 663
 664         obj = out.pointer;
 665         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 666         obj->buffer.length == sizeof(struct wmab_ret)) {
 667                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 668         } else {
 669                 status = AE_ERROR;
 670                 goto out;
 671         }
 672
 673         if (ret.eax & 0x1)
 674                 interface->capability |= ACER_CAP_WIRELESS;
 675
 676         args.ebx = 2 << 8;
 677         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 678
 679         /*
 680          * It's ok to use existing buffer for next wmab_execute call.
 681          * But we need to kfree(out.pointer) if next wmab_execute fail.
 682          */
 683         status = wmab_execute(&args, &out);
 684         if (ACPI_FAILURE(status))
 685                 goto out;
 686
 687         obj = (union acpi_object *) out.pointer;
 688         if (obj && obj->type == ACPI_TYPE_BUFFER
 689         && obj->buffer.length == sizeof(struct wmab_ret)) {
 690                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 691         } else {
 692                 status = AE_ERROR;
 693                 goto out;
 694         }
 695
 696         if (ret.eax & 0x1)
 697                 interface->capability |= ACER_CAP_BLUETOOTH;
 698
 699         /*
 700          * This appears to be safe to enable, since all Wistron based laptops
 701          * appear to use the same EC register for brightness, even if they
 702          * differ for wireless, etc
 703          */
 704         if (quirks->brightness >= 0)
 705                 interface->capability |= ACER_CAP_BRIGHTNESS;
 706
 707         status = AE_OK;
 708 out:
 709         kfree(out.pointer);
 710         return status;
 711 }
 712
 713 static struct wmi_interface AMW0_interface = {
 714         .type = ACER_AMW0,
 715 };
 716
 717 static struct wmi_interface AMW0_V2_interface = {
 718         .type = ACER_AMW0_V2,
 719 };
 720
 721 /*
 722  * New interface (The WMID interface)
 723  */
 724 static acpi_status
 725 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 726 {
 727         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 728         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 729         union acpi_object *obj;
 730         u32 tmp;
 731         acpi_status status;
 732
 733         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 734
 735         if (ACPI_FAILURE(status))
 736                 return status;
 737
 738         obj = (union acpi_object *) result.pointer;
 739         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 740                 obj->buffer.length == sizeof(u32)) {
 741                 tmp = *((u32 *) obj->buffer.pointer);
 742         } else {
 743                 tmp = 0;
 744         }
 745
 746         if (out)
 747                 *out = tmp;
 748
 749         kfree(result.pointer);
 750
 751         return status;
 752 }
 753
 754 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 755 struct wmi_interface *iface)
 756 {
 757         acpi_status status;
 758         u8 tmp;
 759         u32 result, method_id = 0;
 760
 761         switch (cap) {
 762         case ACER_CAP_WIRELESS:
 763                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 764                 break;
 765         case ACER_CAP_BLUETOOTH:
 766                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 767                 break;
 768         case ACER_CAP_BRIGHTNESS:
 769                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 770                 break;
 771         case ACER_CAP_THREEG:
 772                 method_id = ACER_WMID_GET_THREEG_METHODID;
 773                 break;
 774         case ACER_CAP_MAILLED:
 775                 if (quirks->mailled == 1) {
 776                         ec_read(0x9f, &tmp);
 777                         *value = tmp & 0x1;
 778                         return 0;
 779                 }
 780         default:
 781                 return AE_ERROR;
 782         }
 783         status = WMI_execute_u32(method_id, 0, &result);
 784
 785         if (ACPI_SUCCESS(status))
 786                 *value = (u8)result;
 787
 788         return status;
 789 }
 790
 791 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 792 {
 793         u32 method_id = 0;
 794         char param;
 795
 796         switch (cap) {
 797         case ACER_CAP_BRIGHTNESS:
 798                 if (value > max_brightness)
 799                         return AE_BAD_PARAMETER;
 800                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 801                 break;
 802         case ACER_CAP_WIRELESS:
 803                 if (value > 1)
 804                         return AE_BAD_PARAMETER;
 805                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 806                 break;
 807         case ACER_CAP_BLUETOOTH:
 808                 if (value > 1)
 809                         return AE_BAD_PARAMETER;
 810                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 811                 break;
 812         case ACER_CAP_THREEG:
 813                 if (value > 1)
 814                         return AE_BAD_PARAMETER;
 815                 method_id = ACER_WMID_SET_THREEG_METHODID;
 816                 break;
 817         case ACER_CAP_MAILLED:
 818                 if (value > 1)
 819                         return AE_BAD_PARAMETER;
 820                 if (quirks->mailled == 1) {
 821                         param = value ? 0x92 : 0x93;
 822                         i8042_lock_chip();
 823                         i8042_command(&param, 0x1059);
 824                         i8042_unlock_chip();
 825                         return 0;
 826                 }
 827                 break;
 828         default:
 829                 return AE_ERROR;
 830         }
 831         return WMI_execute_u32(method_id, (u32)value, NULL);
 832 }
 833
 834 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
 835 {
 836         struct hotkey_function_type_aa *type_aa;
 837
 838         /* We are looking for OEM-specific Type AAh */
 839         if (header->type != 0xAA)
 840                 return;
 841
 842         has_type_aa = true;
 843         type_aa = (struct hotkey_function_type_aa *) header;
 844
 845         pr_info("Function bitmap for Communication Button: 0x%x\n",
 846                 type_aa->commun_func_bitmap);
 847
 848         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
 849                 interface->capability |= ACER_CAP_WIRELESS;
 850         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
 851                 interface->capability |= ACER_CAP_THREEG;
 852         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
 853                 interface->capability |= ACER_CAP_BLUETOOTH;
 854 }
 855
 856 static acpi_status WMID_set_capabilities(void)
 857 {
 858         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 859         union acpi_object *obj;
 860         acpi_status status;
 861         u32 devices;
 862
 863         status = wmi_query_block(WMID_GUID2, 1, &out);
 864         if (ACPI_FAILURE(status))
 865                 return status;
 866
 867         obj = (union acpi_object *) out.pointer;
 868         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 869                 obj->buffer.length == sizeof(u32)) {
 870                 devices = *((u32 *) obj->buffer.pointer);
 871         } else {
 872                 kfree(out.pointer);
 873                 return AE_ERROR;
 874         }
 875
 876         dmi_walk(type_aa_dmi_decode, NULL);
 877         if (!has_type_aa) {
 878                 interface->capability |= ACER_CAP_WIRELESS;
 879                 interface->capability |= ACER_CAP_THREEG;
 880                 if (devices & 0x10)
 881                         interface->capability |= ACER_CAP_BLUETOOTH;
 882         }
 883
 884         /* WMID always provides brightness methods */
 885         interface->capability |= ACER_CAP_BRIGHTNESS;
 886
 887         if (!(devices & 0x20))
 888                 max_brightness = 0x9;
 889
 890         kfree(out.pointer);
 891         return status;
 892 }
 893
 894 static struct wmi_interface wmid_interface = {
 895         .type = ACER_WMID,
 896 };
 897
 898 /*
 899  * Generic Device (interface-independent)
 900  */
 901
 902 static acpi_status get_u32(u32 *value, u32 cap)
 903 {
 904         acpi_status status = AE_ERROR;
 905
 906         switch (interface->type) {
 907         case ACER_AMW0:
 908                 status = AMW0_get_u32(value, cap, interface);
 909                 break;
 910         case ACER_AMW0_V2:
 911                 if (cap == ACER_CAP_MAILLED) {
 912                         status = AMW0_get_u32(value, cap, interface);
 913                         break;
 914                 }
 915         case ACER_WMID:
 916                 status = WMID_get_u32(value, cap, interface);
 917                 break;
 918         }
 919
 920         return status;
 921 }
 922
 923 static acpi_status set_u32(u32 value, u32 cap)
 924 {
 925         acpi_status status;
 926
 927         if (interface->capability & cap) {
 928                 switch (interface->type) {
 929                 case ACER_AMW0:
 930                         return AMW0_set_u32(value, cap, interface);
 931                 case ACER_AMW0_V2:
 932                         if (cap == ACER_CAP_MAILLED)
 933                                 return AMW0_set_u32(value, cap, interface);
 934
 935                         /*
 936                          * On some models, some WMID methods don't toggle
 937                          * properly. For those cases, we want to run the AMW0
 938                          * method afterwards to be certain we've really toggled
 939                          * the device state.
 940                          */
 941                         if (cap == ACER_CAP_WIRELESS ||
 942                                 cap == ACER_CAP_BLUETOOTH) {
 943                                 status = WMID_set_u32(value, cap, interface);
 944                                 if (ACPI_FAILURE(status))
 945                                         return status;
 946
 947                                 return AMW0_set_u32(value, cap, interface);
 948                         }
 949                 case ACER_WMID:
 950                         return WMID_set_u32(value, cap, interface);
 951                 default:
 952                         return AE_BAD_PARAMETER;
 953                 }
 954         }
 955         return AE_BAD_PARAMETER;
 956 }
 957
 958 static void __init acer_commandline_init(void)
 959 {
 960         /*
 961          * These will all fail silently if the value given is invalid, or the
 962          * capability isn't available on the given interface
 963          */
 964         if (mailled >= 0)
 965                 set_u32(mailled, ACER_CAP_MAILLED);
 966         if (!has_type_aa && threeg >= 0)
 967                 set_u32(threeg, ACER_CAP_THREEG);
 968         if (brightness >= 0)
 969                 set_u32(brightness, ACER_CAP_BRIGHTNESS);
 970 }
 971
 972 /*
 973  * LED device (Mail LED only, no other LEDs known yet)
 974  */
 975 static void mail_led_set(struct led_classdev *led_cdev,
 976 enum led_brightness value)
 977 {
 978         set_u32(value, ACER_CAP_MAILLED);
 979 }
 980
 981 static struct led_classdev mail_led = {
 982         .name = "acer-wmi::mail",
 983         .brightness_set = mail_led_set,
 984 };
 985
 986 static int __devinit acer_led_init(struct device *dev)
 987 {
 988         return led_classdev_register(dev, &mail_led);
 989 }
 990
 991 static void acer_led_exit(void)
 992 {
 993         set_u32(LED_OFF, ACER_CAP_MAILLED);
 994         led_classdev_unregister(&mail_led);
 995 }
 996
 997 /*
 998  * Backlight device
 999  */
1000 static struct backlight_device *acer_backlight_device;
1001
1002 static int read_brightness(struct backlight_device *bd)
1003 {
1004         u32 value;
1005         get_u32(&value, ACER_CAP_BRIGHTNESS);
1006         return value;
1007 }
1008
1009 static int update_bl_status(struct backlight_device *bd)
1010 {
1011         int intensity = bd->props.brightness;
1012
1013         if (bd->props.power != FB_BLANK_UNBLANK)
1014                 intensity = 0;
1015         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1016                 intensity = 0;
1017
1018         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1019
1020         return 0;
1021 }
1022
1023 static const struct backlight_ops acer_bl_ops = {
1024         .get_brightness = read_brightness,
1025         .update_status = update_bl_status,
1026 };
1027
1028 static int __devinit acer_backlight_init(struct device *dev)
1029 {
1030         struct backlight_properties props;
1031         struct backlight_device *bd;
1032
1033         memset(&props, 0, sizeof(struct backlight_properties));
1034         props.type = BACKLIGHT_PLATFORM;
1035         props.max_brightness = max_brightness;
1036         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1037                                        &props);
1038         if (IS_ERR(bd)) {
1039                 pr_err("Could not register Acer backlight device\n");
1040                 acer_backlight_device = NULL;
1041                 return PTR_ERR(bd);
1042         }
1043
1044         acer_backlight_device = bd;
1045
1046         bd->props.power = FB_BLANK_UNBLANK;
1047         bd->props.brightness = read_brightness(bd);
1048         backlight_update_status(bd);
1049         return 0;
1050 }
1051
1052 static void acer_backlight_exit(void)
1053 {
1054         backlight_device_unregister(acer_backlight_device);
1055 }
1056
1057 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1058 {
1059         struct wmid3_gds_return_value return_value;
1060         acpi_status status;
1061         union acpi_object *obj;
1062         struct wmid3_gds_input_param params = {
1063                 .function_num = 0x1,
1064                 .hotkey_number = 0x01,
1065                 .devices = device,
1066         };
1067         struct acpi_buffer input = {
1068                 sizeof(struct wmid3_gds_input_param),
1069                 &params
1070         };
1071         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1072
1073         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1074         if (ACPI_FAILURE(status))
1075                 return status;
1076
1077         obj = output.pointer;
1078
1079         if (!obj)
1080                 return AE_ERROR;
1081         else if (obj->type != ACPI_TYPE_BUFFER) {
1082                 kfree(obj);
1083                 return AE_ERROR;
1084         }
1085         if (obj->buffer.length != 8) {
1086                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1087                 kfree(obj);
1088                 return AE_ERROR;
1089         }
1090
1091         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1092         kfree(obj);
1093
1094         if (return_value.error_code || return_value.ec_return_value)
1095                 pr_warn("Get Device Status failed: 0x%x - 0x%x\n",
1096                         return_value.error_code,
1097                         return_value.ec_return_value);
1098         else
1099                 *value = !!(return_value.devices & device);
1100
1101         return status;
1102 }
1103
1104 static acpi_status get_device_status(u32 *value, u32 cap)
1105 {
1106         if (wmi_has_guid(WMID_GUID3)) {
1107                 u16 device;
1108
1109                 switch (cap) {
1110                 case ACER_CAP_WIRELESS:
1111                         device = ACER_WMID3_GDS_WIRELESS;
1112                         break;
1113                 case ACER_CAP_BLUETOOTH:
1114                         device = ACER_WMID3_GDS_BLUETOOTH;
1115                         break;
1116                 case ACER_CAP_THREEG:
1117                         device = ACER_WMID3_GDS_THREEG;
1118                         break;
1119                 default:
1120                         return AE_ERROR;
1121                 }
1122                 return wmid3_get_device_status(value, device);
1123
1124         } else {
1125                 return get_u32(value, cap);
1126         }
1127 }
1128
1129 /*
1130  * Rfkill devices
1131  */
1132 static void acer_rfkill_update(struct work_struct *ignored);
1133 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1134 static void acer_rfkill_update(struct work_struct *ignored)
1135 {
1136         u32 state;
1137         acpi_status status;
1138
1139         status = get_u32(&state, ACER_CAP_WIRELESS);
1140         if (ACPI_SUCCESS(status))
1141                 rfkill_set_sw_state(wireless_rfkill, !state);
1142
1143         if (has_cap(ACER_CAP_BLUETOOTH)) {
1144                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1145                 if (ACPI_SUCCESS(status))
1146                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1147         }
1148
1149         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1150                 status = wmid3_get_device_status(&state,
1151                                 ACER_WMID3_GDS_THREEG);
1152                 if (ACPI_SUCCESS(status))
1153                         rfkill_set_sw_state(threeg_rfkill, !state);
1154         }
1155
1156         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1157 }
1158
1159 static int acer_rfkill_set(void *data, bool blocked)
1160 {
1161         acpi_status status;
1162         u32 cap = (unsigned long)data;
1163
1164         if (rfkill_inited) {
1165                 status = set_u32(!blocked, cap);
1166                 if (ACPI_FAILURE(status))
1167                         return -ENODEV;
1168         }
1169
1170         return 0;
1171 }
1172
1173 static const struct rfkill_ops acer_rfkill_ops = {
1174         .set_block = acer_rfkill_set,
1175 };
1176
1177 static struct rfkill *acer_rfkill_register(struct device *dev,
1178                                            enum rfkill_type type,
1179                                            char *name, u32 cap)
1180 {
1181         int err;
1182         struct rfkill *rfkill_dev;
1183         u32 state;
1184         acpi_status status;
1185
1186         rfkill_dev = rfkill_alloc(name, dev, type,
1187                                   &acer_rfkill_ops,
1188                                   (void *)(unsigned long)cap);
1189         if (!rfkill_dev)
1190                 return ERR_PTR(-ENOMEM);
1191
1192         status = get_device_status(&state, cap);
1193
1194         err = rfkill_register(rfkill_dev);
1195         if (err) {
1196                 rfkill_destroy(rfkill_dev);
1197                 return ERR_PTR(err);
1198         }
1199
1200         if (ACPI_SUCCESS(status))
1201                 rfkill_set_sw_state(rfkill_dev, !state);
1202
1203         return rfkill_dev;
1204 }
1205
1206 static int acer_rfkill_init(struct device *dev)
1207 {
1208         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1209                 "acer-wireless", ACER_CAP_WIRELESS);
1210         if (IS_ERR(wireless_rfkill))
1211                 return PTR_ERR(wireless_rfkill);
1212
1213         if (has_cap(ACER_CAP_BLUETOOTH)) {
1214                 bluetooth_rfkill = acer_rfkill_register(dev,
1215                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1216                         ACER_CAP_BLUETOOTH);
1217                 if (IS_ERR(bluetooth_rfkill)) {
1218                         rfkill_unregister(wireless_rfkill);
1219                         rfkill_destroy(wireless_rfkill);
1220                         return PTR_ERR(bluetooth_rfkill);
1221                 }
1222         }
1223
1224         if (has_cap(ACER_CAP_THREEG)) {
1225                 threeg_rfkill = acer_rfkill_register(dev,
1226                         RFKILL_TYPE_WWAN, "acer-threeg",
1227                         ACER_CAP_THREEG);
1228                 if (IS_ERR(threeg_rfkill)) {
1229                         rfkill_unregister(wireless_rfkill);
1230                         rfkill_destroy(wireless_rfkill);
1231                         rfkill_unregister(bluetooth_rfkill);
1232                         rfkill_destroy(bluetooth_rfkill);
1233                         return PTR_ERR(threeg_rfkill);
1234                 }
1235         }
1236
1237         rfkill_inited = true;
1238
1239         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1240                 schedule_delayed_work(&acer_rfkill_work,
1241                         round_jiffies_relative(HZ));
1242
1243         return 0;
1244 }
1245
1246 static void acer_rfkill_exit(void)
1247 {
1248         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1249                 cancel_delayed_work_sync(&acer_rfkill_work);
1250
1251         rfkill_unregister(wireless_rfkill);
1252         rfkill_destroy(wireless_rfkill);
1253
1254         if (has_cap(ACER_CAP_BLUETOOTH)) {
1255                 rfkill_unregister(bluetooth_rfkill);
1256                 rfkill_destroy(bluetooth_rfkill);
1257         }
1258
1259         if (has_cap(ACER_CAP_THREEG)) {
1260                 rfkill_unregister(threeg_rfkill);
1261                 rfkill_destroy(threeg_rfkill);
1262         }
1263         return;
1264 }
1265
1266 /*
1267  * sysfs interface
1268  */
1269 static ssize_t show_bool_threeg(struct device *dev,
1270         struct device_attribute *attr, char *buf)
1271 {
1272         u32 result; \
1273         acpi_status status;
1274         if (wmi_has_guid(WMID_GUID3))
1275                 status = wmid3_get_device_status(&result,
1276                                 ACER_WMID3_GDS_THREEG);
1277         else
1278                 status = get_u32(&result, ACER_CAP_THREEG);
1279         if (ACPI_SUCCESS(status))
1280                 return sprintf(buf, "%u\n", result);
1281         return sprintf(buf, "Read error\n");
1282 }
1283
1284 static ssize_t set_bool_threeg(struct device *dev,
1285         struct device_attribute *attr, const char *buf, size_t count)
1286 {
1287         u32 tmp = simple_strtoul(buf, NULL, 10);
1288         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1289                 if (ACPI_FAILURE(status))
1290                         return -EINVAL;
1291         return count;
1292 }
1293 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1294         set_bool_threeg);
1295
1296 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1297         char *buf)
1298 {
1299         switch (interface->type) {
1300         case ACER_AMW0:
1301                 return sprintf(buf, "AMW0\n");
1302         case ACER_AMW0_V2:
1303                 return sprintf(buf, "AMW0 v2\n");
1304         case ACER_WMID:
1305                 return sprintf(buf, "WMID\n");
1306         default:
1307                 return sprintf(buf, "Error!\n");
1308         }
1309 }
1310
1311 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1312
1313 static void acer_wmi_notify(u32 value, void *context)
1314 {
1315         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1316         union acpi_object *obj;
1317         struct event_return_value return_value;
1318         acpi_status status;
1319
1320         status = wmi_get_event_data(value, &response);
1321         if (status != AE_OK) {
1322                 pr_warn("bad event status 0x%x\n", status);
1323                 return;
1324         }
1325
1326         obj = (union acpi_object *)response.pointer;
1327
1328         if (!obj)
1329                 return;
1330         if (obj->type != ACPI_TYPE_BUFFER) {
1331                 pr_warn("Unknown response received %d\n", obj->type);
1332                 kfree(obj);
1333                 return;
1334         }
1335         if (obj->buffer.length != 8) {
1336                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1337                 kfree(obj);
1338                 return;
1339         }
1340
1341         return_value = *((struct event_return_value *)obj->buffer.pointer);
1342         kfree(obj);
1343
1344         switch (return_value.function) {
1345         case WMID_HOTKEY_EVENT:
1346                 if (return_value.device_state) {
1347                         u16 device_state = return_value.device_state;
1348                         pr_debug("deivces states: 0x%x\n", device_state);
1349                         if (has_cap(ACER_CAP_WIRELESS))
1350                                 rfkill_set_sw_state(wireless_rfkill,
1351                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1352                         if (has_cap(ACER_CAP_BLUETOOTH))
1353                                 rfkill_set_sw_state(bluetooth_rfkill,
1354                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1355                         if (has_cap(ACER_CAP_THREEG))
1356                                 rfkill_set_sw_state(threeg_rfkill,
1357                                 !(device_state & ACER_WMID3_GDS_THREEG));
1358                 }
1359                 if (!sparse_keymap_report_event(acer_wmi_input_dev,
1360                                 return_value.key_num, 1, true))
1361                         pr_warn("Unknown key number - 0x%x\n",
1362                                 return_value.key_num);
1363                 break;
1364         default:
1365                 pr_warn("Unknown function number - %d - %d\n",
1366                         return_value.function, return_value.key_num);
1367                 break;
1368         }
1369 }
1370
1371 static acpi_status
1372 wmid3_set_lm_mode(struct lm_input_params *params,
1373                   struct lm_return_value *return_value)
1374 {
1375         acpi_status status;
1376         union acpi_object *obj;
1377
1378         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1379         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1380
1381         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1382         if (ACPI_FAILURE(status))
1383                 return status;
1384
1385         obj = output.pointer;
1386
1387         if (!obj)
1388                 return AE_ERROR;
1389         else if (obj->type != ACPI_TYPE_BUFFER) {
1390                 kfree(obj);
1391                 return AE_ERROR;
1392         }
1393         if (obj->buffer.length != 4) {
1394                 pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1395                 kfree(obj);
1396                 return AE_ERROR;
1397         }
1398
1399         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1400         kfree(obj);
1401
1402         return status;
1403 }
1404
1405 static int acer_wmi_enable_ec_raw(void)
1406 {
1407         struct lm_return_value return_value;
1408         acpi_status status;
1409         struct lm_input_params params = {
1410                 .function_num = 0x1,
1411                 .commun_devices = 0xFFFF,
1412                 .devices = 0xFFFF,
1413                 .lm_status = 0x00,            /* Launch Manager Deactive */
1414         };
1415
1416         status = wmid3_set_lm_mode(&params, &return_value);
1417
1418         if (return_value.error_code || return_value.ec_return_value)
1419                 pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1420                         return_value.error_code,
1421                         return_value.ec_return_value);
1422         else
1423                 pr_info("Enabled EC raw mode\n");
1424
1425         return status;
1426 }
1427
1428 static int acer_wmi_enable_lm(void)
1429 {
1430         struct lm_return_value return_value;
1431         acpi_status status;
1432         struct lm_input_params params = {
1433                 .function_num = 0x1,
1434                 .commun_devices = 0xFFFF,
1435                 .devices = 0xFFFF,
1436                 .lm_status = 0x01,            /* Launch Manager Active */
1437         };
1438
1439         status = wmid3_set_lm_mode(&params, &return_value);
1440
1441         if (return_value.error_code || return_value.ec_return_value)
1442                 pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1443                         return_value.error_code,
1444                         return_value.ec_return_value);
1445
1446         return status;
1447 }
1448
1449 static int __init acer_wmi_input_setup(void)
1450 {
1451         acpi_status status;
1452         int err;
1453
1454         acer_wmi_input_dev = input_allocate_device();
1455         if (!acer_wmi_input_dev)
1456                 return -ENOMEM;
1457
1458         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1459         acer_wmi_input_dev->phys = "wmi/input0";
1460         acer_wmi_input_dev->id.bustype = BUS_HOST;
1461
1462         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1463         if (err)
1464                 goto err_free_dev;
1465
1466         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1467                                                 acer_wmi_notify, NULL);
1468         if (ACPI_FAILURE(status)) {
1469                 err = -EIO;
1470                 goto err_free_keymap;
1471         }
1472
1473         err = input_register_device(acer_wmi_input_dev);
1474         if (err)
1475                 goto err_uninstall_notifier;
1476
1477         return 0;
1478
1479 err_uninstall_notifier:
1480         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1481 err_free_keymap:
1482         sparse_keymap_free(acer_wmi_input_dev);
1483 err_free_dev:
1484         input_free_device(acer_wmi_input_dev);
1485         return err;
1486 }
1487
1488 static void acer_wmi_input_destroy(void)
1489 {
1490         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1491         sparse_keymap_free(acer_wmi_input_dev);
1492         input_unregister_device(acer_wmi_input_dev);
1493 }
1494
1495 /*
1496  * debugfs functions
1497  */
1498 static u32 get_wmid_devices(void)
1499 {
1500         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1501         union acpi_object *obj;
1502         acpi_status status;
1503         u32 devices = 0;
1504
1505         status = wmi_query_block(WMID_GUID2, 1, &out);
1506         if (ACPI_FAILURE(status))
1507                 return 0;
1508
1509         obj = (union acpi_object *) out.pointer;
1510         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1511                 obj->buffer.length == sizeof(u32)) {
1512                 devices = *((u32 *) obj->buffer.pointer);
1513         }
1514
1515         kfree(out.pointer);
1516         return devices;
1517 }
1518
1519 /*
1520  * Platform device
1521  */
1522 static int __devinit acer_platform_probe(struct platform_device *device)
1523 {
1524         int err;
1525
1526         if (has_cap(ACER_CAP_MAILLED)) {
1527                 err = acer_led_init(&device->dev);
1528                 if (err)
1529                         goto error_mailled;
1530         }
1531
1532         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1533                 err = acer_backlight_init(&device->dev);
1534                 if (err)
1535                         goto error_brightness;
1536         }
1537
1538         err = acer_rfkill_init(&device->dev);
1539         if (err)
1540                 goto error_rfkill;
1541
1542         return err;
1543
1544 error_rfkill:
1545         if (has_cap(ACER_CAP_BRIGHTNESS))
1546                 acer_backlight_exit();
1547 error_brightness:
1548         if (has_cap(ACER_CAP_MAILLED))
1549                 acer_led_exit();
1550 error_mailled:
1551         return err;
1552 }
1553
1554 static int acer_platform_remove(struct platform_device *device)
1555 {
1556         if (has_cap(ACER_CAP_MAILLED))
1557                 acer_led_exit();
1558         if (has_cap(ACER_CAP_BRIGHTNESS))
1559                 acer_backlight_exit();
1560
1561         acer_rfkill_exit();
1562         return 0;
1563 }
1564
1565 static int acer_platform_suspend(struct platform_device *dev,
1566 pm_message_t state)
1567 {
1568         u32 value;
1569         struct acer_data *data = &interface->data;
1570
1571         if (!data)
1572                 return -ENOMEM;
1573
1574         if (has_cap(ACER_CAP_MAILLED)) {
1575                 get_u32(&value, ACER_CAP_MAILLED);
1576                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1577                 data->mailled = value;
1578         }
1579
1580         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1581                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1582                 data->brightness = value;
1583         }
1584
1585         return 0;
1586 }
1587
1588 static int acer_platform_resume(struct platform_device *device)
1589 {
1590         struct acer_data *data = &interface->data;
1591
1592         if (!data)
1593                 return -ENOMEM;
1594
1595         if (has_cap(ACER_CAP_MAILLED))
1596                 set_u32(data->mailled, ACER_CAP_MAILLED);
1597
1598         if (has_cap(ACER_CAP_BRIGHTNESS))
1599                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1600
1601         return 0;
1602 }
1603
1604 static void acer_platform_shutdown(struct platform_device *device)
1605 {
1606         struct acer_data *data = &interface->data;
1607
1608         if (!data)
1609                 return;
1610
1611         if (has_cap(ACER_CAP_MAILLED))
1612                 set_u32(LED_OFF, ACER_CAP_MAILLED);
1613 }
1614
1615 static struct platform_driver acer_platform_driver = {
1616         .driver = {
1617                 .name = "acer-wmi",
1618                 .owner = THIS_MODULE,
1619         },
1620         .probe = acer_platform_probe,
1621         .remove = acer_platform_remove,
1622         .suspend = acer_platform_suspend,
1623         .resume = acer_platform_resume,
1624         .shutdown = acer_platform_shutdown,
1625 };
1626
1627 static struct platform_device *acer_platform_device;
1628
1629 static int remove_sysfs(struct platform_device *device)
1630 {
1631         if (has_cap(ACER_CAP_THREEG))
1632                 device_remove_file(&device->dev, &dev_attr_threeg);
1633
1634         device_remove_file(&device->dev, &dev_attr_interface);
1635
1636         return 0;
1637 }
1638
1639 static int create_sysfs(void)
1640 {
1641         int retval = -ENOMEM;
1642
1643         if (has_cap(ACER_CAP_THREEG)) {
1644                 retval = device_create_file(&acer_platform_device->dev,
1645                         &dev_attr_threeg);
1646                 if (retval)
1647                         goto error_sysfs;
1648         }
1649
1650         retval = device_create_file(&acer_platform_device->dev,
1651                 &dev_attr_interface);
1652         if (retval)
1653                 goto error_sysfs;
1654
1655         return 0;
1656
1657 error_sysfs:
1658                 remove_sysfs(acer_platform_device);
1659         return retval;
1660 }
1661
1662 static void remove_debugfs(void)
1663 {
1664         debugfs_remove(interface->debug.devices);
1665         debugfs_remove(interface->debug.root);
1666 }
1667
1668 static int create_debugfs(void)
1669 {
1670         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1671         if (!interface->debug.root) {
1672                 pr_err("Failed to create debugfs directory");
1673                 return -ENOMEM;
1674         }
1675
1676         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1677                                         interface->debug.root,
1678                                         &interface->debug.wmid_devices);
1679         if (!interface->debug.devices)
1680                 goto error_debugfs;
1681
1682         return 0;
1683
1684 error_debugfs:
1685         remove_debugfs();
1686         return -ENOMEM;
1687 }
1688
1689 static int __init acer_wmi_init(void)
1690 {
1691         int err;
1692
1693         pr_info("Acer Laptop ACPI-WMI Extras\n");
1694
1695         if (dmi_check_system(acer_blacklist)) {
1696                 pr_info("Blacklisted hardware detected - not loading\n");
1697                 return -ENODEV;
1698         }
1699
1700         find_quirks();
1701
1702         /*
1703          * Detect which ACPI-WMI interface we're using.
1704          */
1705         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1706                 interface = &AMW0_V2_interface;
1707
1708         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1709                 interface = &wmid_interface;
1710
1711         if (wmi_has_guid(WMID_GUID2) && interface) {
1712                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1713                         pr_err("Unable to detect available WMID devices\n");
1714                         return -ENODEV;
1715                 }
1716         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1717                 pr_err("No WMID device detection method found\n");
1718                 return -ENODEV;
1719         }
1720
1721         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1722                 interface = &AMW0_interface;
1723
1724                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1725                         pr_err("Unable to detect available AMW0 devices\n");
1726                         return -ENODEV;
1727                 }
1728         }
1729
1730         if (wmi_has_guid(AMW0_GUID1))
1731                 AMW0_find_mailled();
1732
1733         if (!interface) {
1734                 pr_err("No or unsupported WMI interface, unable to load\n");
1735                 return -ENODEV;
1736         }
1737
1738         set_quirks();
1739
1740         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1741                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1742                 pr_info("Brightness must be controlled by "
1743                        "generic video driver\n");
1744         }
1745
1746         if (wmi_has_guid(WMID_GUID3)) {
1747                 if (ec_raw_mode) {
1748                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1749                                 pr_err("Cannot enable EC raw mode\n");
1750                                 return -ENODEV;
1751                         }
1752                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1753                         pr_err("Cannot enable Launch Manager mode\n");
1754                         return -ENODEV;
1755                 }
1756         } else if (ec_raw_mode) {
1757                 pr_info("No WMID EC raw mode enable method\n");
1758         }
1759
1760         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1761                 err = acer_wmi_input_setup();
1762                 if (err)
1763                         return err;
1764         }
1765
1766         err = platform_driver_register(&acer_platform_driver);
1767         if (err) {
1768                 pr_err("Unable to register platform driver.\n");
1769                 goto error_platform_register;
1770         }
1771
1772         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1773         if (!acer_platform_device) {
1774                 err = -ENOMEM;
1775                 goto error_device_alloc;
1776         }
1777
1778         err = platform_device_add(acer_platform_device);
1779         if (err)
1780                 goto error_device_add;
1781
1782         err = create_sysfs();
1783         if (err)
1784                 goto error_create_sys;
1785
1786         if (wmi_has_guid(WMID_GUID2)) {
1787                 interface->debug.wmid_devices = get_wmid_devices();
1788                 err = create_debugfs();
1789                 if (err)
1790                         goto error_create_debugfs;
1791         }
1792
1793         /* Override any initial settings with values from the commandline */
1794         acer_commandline_init();
1795
1796         return 0;
1797
1798 error_create_debugfs:
1799         remove_sysfs(acer_platform_device);
1800 error_create_sys:
1801         platform_device_del(acer_platform_device);
1802 error_device_add:
1803         platform_device_put(acer_platform_device);
1804 error_device_alloc:
1805         platform_driver_unregister(&acer_platform_driver);
1806 error_platform_register:
1807         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1808                 acer_wmi_input_destroy();
1809
1810         return err;
1811 }
1812
1813 static void __exit acer_wmi_exit(void)
1814 {
1815         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1816                 acer_wmi_input_destroy();
1817
1818         remove_sysfs(acer_platform_device);
1819         remove_debugfs();
1820         platform_device_unregister(acer_platform_device);
1821         platform_driver_unregister(&acer_platform_driver);
1822
1823         pr_info("Acer Laptop WMI Extras unloaded\n");
1824         return;
1825 }
1826
1827 module_init(acer_wmi_init);
1828 module_exit(acer_wmi_exit);