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