drivers/platform/x86/acer-wmi.c

   1 /*
   2  *  Acer WMI Laptop Extras
   3  *
   4  *  Copyright (C) 2007-2009     Carlos Corbacho <carlos@strangeworlds.co.uk>
   5  *
   6  *  Based on acer_acpi:
   7  *    Copyright (C) 2005-2007   E.M. Smith
   8  *    Copyright (C) 2007-2008   Carlos Corbacho <cathectic@gmail.com>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/init.h>
  28 #include <linux/types.h>
  29 #include <linux/dmi.h>
  30 #include <linux/fb.h>
  31 #include <linux/backlight.h>
  32 #include <linux/leds.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/acpi.h>
  35 #include <linux/i8042.h>
  36 #include <linux/rfkill.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/debugfs.h>
  39 #include <linux/slab.h>
  40 #include <linux/input.h>
  41 #include <linux/input/sparse-keymap.h>
  42 #include <linux/dmi.h>
  43
  44 #include <acpi/acpi_drivers.h>
  45
  46 MODULE_AUTHOR("Carlos Corbacho");
  47 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  48 MODULE_LICENSE("GPL");
  49
  50 #define ACER_LOGPREFIX "acer-wmi: "
  51 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  52 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  53 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  54 #define ACER_WARNING KERN_WARNING ACER_LOGPREFIX
  55
  56 /*
  57  * Magic Number
  58  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  59  * (it's also used in acerhk when directly accessing the BIOS)
  60  */
  61 #define ACER_AMW0_WRITE 0x9610
  62
  63 /*
  64  * Bit masks for the AMW0 interface
  65  */
  66 #define ACER_AMW0_WIRELESS_MASK  0x35
  67 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  68 #define ACER_AMW0_MAILLED_MASK   0x31
  69
  70 /*
  71  * Method IDs for WMID interface
  72  */
  73 #define ACER_WMID_GET_WIRELESS_METHODID         1
  74 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  75 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  76 #define ACER_WMID_SET_WIRELESS_METHODID         4
  77 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  78 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  79 #define ACER_WMID_GET_THREEG_METHODID           10
  80 #define ACER_WMID_SET_THREEG_METHODID           11
  81
  82 /*
  83  * Acer ACPI method GUIDs
  84  */
  85 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  86 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  87 #define WMID_GUID1              "6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
  88 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  89 #define WMID_GUID3              "61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
  90
  91 /*
  92  * Acer ACPI event GUIDs
  93  */
  94 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
  95
  96 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  97 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  98 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
  99
 100 enum acer_wmi_event_ids {
 101         WMID_HOTKEY_EVENT = 0x1,
 102 };
 103
 104 static const struct key_entry acer_wmi_keymap[] = {
 105         {KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
 106         {KE_KEY, 0x04, {KEY_WLAN} },     /* WiFi */
 107         {KE_KEY, 0x12, {KEY_BLUETOOTH} },       /* BT */
 108         {KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
 109         {KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
 110         {KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
 111         {KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
 112         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
 113         {KE_KEY, 0x82, {KEY_F22} },      /* Touch Pad On/Off */
 114         {KE_END, 0}
 115 };
 116
 117 static struct input_dev *acer_wmi_input_dev;
 118
 119 struct event_return_value {
 120         u8 function;
 121         u8 key_num;
 122         u16 device_state;
 123         u32 reserved;
 124 } __attribute__((packed));
 125
 126 /*
 127  * GUID3 Get Device Status device flags
 128  */
 129 #define ACER_WMID3_GDS_WIRELESS         (1<<0)  /* WiFi */
 130 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
 131 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
 132
 133 struct lm_input_params {
 134         u8 function_num;        /* Function Number */
 135         u16 commun_devices;     /* Communication type devices default status */
 136         u16 devices;            /* Other type devices default status */
 137         u8 lm_status;           /* Launch Manager Status */
 138         u16 reserved;
 139 } __attribute__((packed));
 140
 141 struct lm_return_value {
 142         u8 error_code;          /* Error Code */
 143         u8 ec_return_value;     /* EC Return Value */
 144         u16 reserved;
 145 } __attribute__((packed));
 146
 147 struct wmid3_gds_input_param {  /* Get Device Status input parameter */
 148         u8 function_num;        /* Function Number */
 149         u8 hotkey_number;       /* Hotkey Number */
 150         u16 devices;            /* Get Device */
 151 } __attribute__((packed));
 152
 153 struct wmid3_gds_return_value { /* Get Device Status return value*/
 154         u8 error_code;          /* Error Code */
 155         u8 ec_return_value;     /* EC Return Value */
 156         u16 devices;            /* Current Device Status */
 157         u32 reserved;
 158 } __attribute__((packed));
 159
 160 struct hotkey_function_type_aa {
 161         u8 type;
 162         u8 length;
 163         u16 handle;
 164         u16 commun_func_bitmap;
 165 } __attribute__((packed));
 166
 167 /*
 168  * Interface capability flags
 169  */
 170 #define ACER_CAP_MAILLED                (1<<0)
 171 #define ACER_CAP_WIRELESS               (1<<1)
 172 #define ACER_CAP_BLUETOOTH              (1<<2)
 173 #define ACER_CAP_BRIGHTNESS             (1<<3)
 174 #define ACER_CAP_THREEG                 (1<<4)
 175 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 176
 177 /*
 178  * Interface type flags
 179  */
 180 enum interface_flags {
 181         ACER_AMW0,
 182         ACER_AMW0_V2,
 183         ACER_WMID,
 184 };
 185
 186 #define ACER_DEFAULT_WIRELESS  0
 187 #define ACER_DEFAULT_BLUETOOTH 0
 188 #define ACER_DEFAULT_MAILLED   0
 189 #define ACER_DEFAULT_THREEG    0
 190
 191 static int max_brightness = 0xF;
 192
 193 static int mailled = -1;
 194 static int brightness = -1;
 195 static int threeg = -1;
 196 static int force_series;
 197 static bool ec_raw_mode;
 198 static bool has_type_aa;
 199
 200 module_param(mailled, int, 0444);
 201 module_param(brightness, int, 0444);
 202 module_param(threeg, int, 0444);
 203 module_param(force_series, int, 0444);
 204 module_param(ec_raw_mode, bool, 0444);
 205 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 206 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 207 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 208 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 209 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
 210
 211 struct acer_data {
 212         int mailled;
 213         int threeg;
 214         int brightness;
 215 };
 216
 217 struct acer_debug {
 218         struct dentry *root;
 219         struct dentry *devices;
 220         u32 wmid_devices;
 221 };
 222
 223 static struct rfkill *wireless_rfkill;
 224 static struct rfkill *bluetooth_rfkill;
 225 static struct rfkill *threeg_rfkill;
 226 static bool rfkill_inited;
 227
 228 /* Each low-level interface must define at least some of the following */
 229 struct wmi_interface {
 230         /* The WMI device type */
 231         u32 type;
 232
 233         /* The capabilities this interface provides */
 234         u32 capability;
 235
 236         /* Private data for the current interface */
 237         struct acer_data data;
 238
 239         /* debugfs entries associated with this interface */
 240         struct acer_debug debug;
 241 };
 242
 243 /* The static interface pointer, points to the currently detected interface */
 244 static struct wmi_interface *interface;
 245
 246 /*
 247  * Embedded Controller quirks
 248  * Some laptops require us to directly access the EC to either enable or query
 249  * features that are not available through WMI.
 250  */
 251
 252 struct quirk_entry {
 253         u8 wireless;
 254         u8 mailled;
 255         s8 brightness;
 256         u8 bluetooth;
 257 };
 258
 259 static struct quirk_entry *quirks;
 260
 261 static void set_quirks(void)
 262 {
 263         if (!interface)
 264                 return;
 265
 266         if (quirks->mailled)
 267                 interface->capability |= ACER_CAP_MAILLED;
 268
 269         if (quirks->brightness)
 270                 interface->capability |= ACER_CAP_BRIGHTNESS;
 271 }
 272
 273 static int dmi_matched(const struct dmi_system_id *dmi)
 274 {
 275         quirks = dmi->driver_data;
 276         return 1;
 277 }
 278
 279 static struct quirk_entry quirk_unknown = {
 280 };
 281
 282 static struct quirk_entry quirk_acer_aspire_1520 = {
 283         .brightness = -1,
 284 };
 285
 286 static struct quirk_entry quirk_acer_travelmate_2490 = {
 287         .mailled = 1,
 288 };
 289
 290 /* This AMW0 laptop has no bluetooth */
 291 static struct quirk_entry quirk_medion_md_98300 = {
 292         .wireless = 1,
 293 };
 294
 295 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 296         .wireless = 2,
 297 };
 298
 299 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 300 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 301         {
 302                 .ident = "Acer Aspire One (SSD)",
 303                 .matches = {
 304                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 305                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 306                 },
 307         },
 308         {
 309                 .ident = "Acer Aspire One (HDD)",
 310                 .matches = {
 311                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 312                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 313                 },
 314         },
 315         {}
 316 };
 317
 318 static struct dmi_system_id acer_quirks[] = {
 319         {
 320                 .callback = dmi_matched,
 321                 .ident = "Acer Aspire 1360",
 322                 .matches = {
 323                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 324                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 325                 },
 326                 .driver_data = &quirk_acer_aspire_1520,
 327         },
 328         {
 329                 .callback = dmi_matched,
 330                 .ident = "Acer Aspire 1520",
 331                 .matches = {
 332                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 333                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 334                 },
 335                 .driver_data = &quirk_acer_aspire_1520,
 336         },
 337         {
 338                 .callback = dmi_matched,
 339                 .ident = "Acer Aspire 3100",
 340                 .matches = {
 341                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 342                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 343                 },
 344                 .driver_data = &quirk_acer_travelmate_2490,
 345         },
 346         {
 347                 .callback = dmi_matched,
 348                 .ident = "Acer Aspire 3610",
 349                 .matches = {
 350                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 351                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 352                 },
 353                 .driver_data = &quirk_acer_travelmate_2490,
 354         },
 355         {
 356                 .callback = dmi_matched,
 357                 .ident = "Acer Aspire 5100",
 358                 .matches = {
 359                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 360                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 361                 },
 362                 .driver_data = &quirk_acer_travelmate_2490,
 363         },
 364         {
 365                 .callback = dmi_matched,
 366                 .ident = "Acer Aspire 5610",
 367                 .matches = {
 368                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 369                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 370                 },
 371                 .driver_data = &quirk_acer_travelmate_2490,
 372         },
 373         {
 374                 .callback = dmi_matched,
 375                 .ident = "Acer Aspire 5630",
 376                 .matches = {
 377                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 378                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 379                 },
 380                 .driver_data = &quirk_acer_travelmate_2490,
 381         },
 382         {
 383                 .callback = dmi_matched,
 384                 .ident = "Acer Aspire 5650",
 385                 .matches = {
 386                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 387                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 388                 },
 389                 .driver_data = &quirk_acer_travelmate_2490,
 390         },
 391         {
 392                 .callback = dmi_matched,
 393                 .ident = "Acer Aspire 5680",
 394                 .matches = {
 395                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 396                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 397                 },
 398                 .driver_data = &quirk_acer_travelmate_2490,
 399         },
 400         {
 401                 .callback = dmi_matched,
 402                 .ident = "Acer Aspire 9110",
 403                 .matches = {
 404                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 405                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 406                 },
 407                 .driver_data = &quirk_acer_travelmate_2490,
 408         },
 409         {
 410                 .callback = dmi_matched,
 411                 .ident = "Acer TravelMate 2490",
 412                 .matches = {
 413                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 414                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 415                 },
 416                 .driver_data = &quirk_acer_travelmate_2490,
 417         },
 418         {
 419                 .callback = dmi_matched,
 420                 .ident = "Acer TravelMate 4200",
 421                 .matches = {
 422                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 423                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 424                 },
 425                 .driver_data = &quirk_acer_travelmate_2490,
 426         },
 427         {
 428                 .callback = dmi_matched,
 429                 .ident = "Fujitsu Siemens Amilo Li 1718",
 430                 .matches = {
 431                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 432                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 433                 },
 434                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 435         },
 436         {
 437                 .callback = dmi_matched,
 438                 .ident = "Medion MD 98300",
 439                 .matches = {
 440                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 441                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 442                 },
 443                 .driver_data = &quirk_medion_md_98300,
 444         },
 445         {}
 446 };
 447
 448 /* Find which quirks are needed for a particular vendor/ model pair */
 449 static void find_quirks(void)
 450 {
 451         if (!force_series) {
 452                 dmi_check_system(acer_quirks);
 453         } else if (force_series == 2490) {
 454                 quirks = &quirk_acer_travelmate_2490;
 455         }
 456
 457         if (quirks == NULL)
 458                 quirks = &quirk_unknown;
 459
 460         set_quirks();
 461 }
 462
 463 /*
 464  * General interface convenience methods
 465  */
 466
 467 static bool has_cap(u32 cap)
 468 {
 469         if ((interface->capability & cap) != 0)
 470                 return 1;
 471
 472         return 0;
 473 }
 474
 475 /*
 476  * AMW0 (V1) interface
 477  */
 478 struct wmab_args {
 479         u32 eax;
 480         u32 ebx;
 481         u32 ecx;
 482         u32 edx;
 483 };
 484
 485 struct wmab_ret {
 486         u32 eax;
 487         u32 ebx;
 488         u32 ecx;
 489         u32 edx;
 490         u32 eex;
 491 };
 492
 493 static acpi_status wmab_execute(struct wmab_args *regbuf,
 494 struct acpi_buffer *result)
 495 {
 496         struct acpi_buffer input;
 497         acpi_status status;
 498         input.length = sizeof(struct wmab_args);
 499         input.pointer = (u8 *)regbuf;
 500
 501         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 502
 503         return status;
 504 }
 505
 506 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 507 struct wmi_interface *iface)
 508 {
 509         int err;
 510         u8 result;
 511
 512         switch (cap) {
 513         case ACER_CAP_MAILLED:
 514                 switch (quirks->mailled) {
 515                 default:
 516                         err = ec_read(0xA, &result);
 517                         if (err)
 518                                 return AE_ERROR;
 519                         *value = (result >> 7) & 0x1;
 520                         return AE_OK;
 521                 }
 522                 break;
 523         case ACER_CAP_WIRELESS:
 524                 switch (quirks->wireless) {
 525                 case 1:
 526                         err = ec_read(0x7B, &result);
 527                         if (err)
 528                                 return AE_ERROR;
 529                         *value = result & 0x1;
 530                         return AE_OK;
 531                 case 2:
 532                         err = ec_read(0x71, &result);
 533                         if (err)
 534                                 return AE_ERROR;
 535                         *value = result & 0x1;
 536                         return AE_OK;
 537                 default:
 538                         err = ec_read(0xA, &result);
 539                         if (err)
 540                                 return AE_ERROR;
 541                         *value = (result >> 2) & 0x1;
 542                         return AE_OK;
 543                 }
 544                 break;
 545         case ACER_CAP_BLUETOOTH:
 546                 switch (quirks->bluetooth) {
 547                 default:
 548                         err = ec_read(0xA, &result);
 549                         if (err)
 550                                 return AE_ERROR;
 551                         *value = (result >> 4) & 0x1;
 552                         return AE_OK;
 553                 }
 554                 break;
 555         case ACER_CAP_BRIGHTNESS:
 556                 switch (quirks->brightness) {
 557                 default:
 558                         err = ec_read(0x83, &result);
 559                         if (err)
 560                                 return AE_ERROR;
 561                         *value = result;
 562                         return AE_OK;
 563                 }
 564                 break;
 565         default:
 566                 return AE_ERROR;
 567         }
 568         return AE_OK;
 569 }
 570
 571 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 572 {
 573         struct wmab_args args;
 574
 575         args.eax = ACER_AMW0_WRITE;
 576         args.ebx = value ? (1<<8) : 0;
 577         args.ecx = args.edx = 0;
 578
 579         switch (cap) {
 580         case ACER_CAP_MAILLED:
 581                 if (value > 1)
 582                         return AE_BAD_PARAMETER;
 583                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 584                 break;
 585         case ACER_CAP_WIRELESS:
 586                 if (value > 1)
 587                         return AE_BAD_PARAMETER;
 588                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 589                 break;
 590         case ACER_CAP_BLUETOOTH:
 591                 if (value > 1)
 592                         return AE_BAD_PARAMETER;
 593                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 594                 break;
 595         case ACER_CAP_BRIGHTNESS:
 596                 if (value > max_brightness)
 597                         return AE_BAD_PARAMETER;
 598                 switch (quirks->brightness) {
 599                 default:
 600                         return ec_write(0x83, value);
 601                         break;
 602                 }
 603         default:
 604                 return AE_ERROR;
 605         }
 606
 607         /* Actually do the set */
 608         return wmab_execute(&args, NULL);
 609 }
 610
 611 static acpi_status AMW0_find_mailled(void)
 612 {
 613         struct wmab_args args;
 614         struct wmab_ret ret;
 615         acpi_status status = AE_OK;
 616         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 617         union acpi_object *obj;
 618
 619         args.eax = 0x86;
 620         args.ebx = args.ecx = args.edx = 0;
 621
 622         status = wmab_execute(&args, &out);
 623         if (ACPI_FAILURE(status))
 624                 return status;
 625
 626         obj = (union acpi_object *) out.pointer;
 627         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 628         obj->buffer.length == sizeof(struct wmab_ret)) {
 629                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 630         } else {
 631                 kfree(out.pointer);
 632                 return AE_ERROR;
 633         }
 634
 635         if (ret.eex & 0x1)
 636                 interface->capability |= ACER_CAP_MAILLED;
 637
 638         kfree(out.pointer);
 639
 640         return AE_OK;
 641 }
 642
 643 static acpi_status AMW0_set_capabilities(void)
 644 {
 645         struct wmab_args args;
 646         struct wmab_ret ret;
 647         acpi_status status;
 648         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 649         union acpi_object *obj;
 650
 651         /*
 652          * On laptops with this strange GUID (non Acer), normal probing doesn't
 653          * work.
 654          */
 655         if (wmi_has_guid(AMW0_GUID2)) {
 656                 interface->capability |= ACER_CAP_WIRELESS;
 657                 return AE_OK;
 658         }
 659
 660         args.eax = ACER_AMW0_WRITE;
 661         args.ecx = args.edx = 0;
 662
 663         args.ebx = 0xa2 << 8;
 664         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 665
 666         status = wmab_execute(&args, &out);
 667         if (ACPI_FAILURE(status))
 668                 return status;
 669
 670         obj = out.pointer;
 671         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 672         obj->buffer.length == sizeof(struct wmab_ret)) {
 673                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 674         } else {
 675                 status = AE_ERROR;
 676                 goto out;
 677         }
 678
 679         if (ret.eax & 0x1)
 680                 interface->capability |= ACER_CAP_WIRELESS;
 681
 682         args.ebx = 2 << 8;
 683         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 684
 685         /*
 686          * It's ok to use existing buffer for next wmab_execute call.
 687          * But we need to kfree(out.pointer) if next wmab_execute fail.
 688          */
 689         status = wmab_execute(&args, &out);
 690         if (ACPI_FAILURE(status))
 691                 goto out;
 692
 693         obj = (union acpi_object *) out.pointer;
 694         if (obj && obj->type == ACPI_TYPE_BUFFER
 695         && obj->buffer.length == sizeof(struct wmab_ret)) {
 696                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 697         } else {
 698                 status = AE_ERROR;
 699                 goto out;
 700         }
 701
 702         if (ret.eax & 0x1)
 703                 interface->capability |= ACER_CAP_BLUETOOTH;
 704
 705         /*
 706          * This appears to be safe to enable, since all Wistron based laptops
 707          * appear to use the same EC register for brightness, even if they
 708          * differ for wireless, etc
 709          */
 710         if (quirks->brightness >= 0)
 711                 interface->capability |= ACER_CAP_BRIGHTNESS;
 712
 713         status = AE_OK;
 714 out:
 715         kfree(out.pointer);
 716         return status;
 717 }
 718
 719 static struct wmi_interface AMW0_interface = {
 720         .type = ACER_AMW0,
 721 };
 722
 723 static struct wmi_interface AMW0_V2_interface = {
 724         .type = ACER_AMW0_V2,
 725 };
 726
 727 /*
 728  * New interface (The WMID interface)
 729  */
 730 static acpi_status
 731 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 732 {
 733         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 734         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 735         union acpi_object *obj;
 736         u32 tmp;
 737         acpi_status status;
 738
 739         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 740
 741         if (ACPI_FAILURE(status))
 742                 return status;
 743
 744         obj = (union acpi_object *) result.pointer;
 745         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 746                 obj->buffer.length == sizeof(u32)) {
 747                 tmp = *((u32 *) obj->buffer.pointer);
 748         } else {
 749                 tmp = 0;
 750         }
 751
 752         if (out)
 753                 *out = tmp;
 754
 755         kfree(result.pointer);
 756
 757         return status;
 758 }
 759
 760 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 761 struct wmi_interface *iface)
 762 {
 763         acpi_status status;
 764         u8 tmp;
 765         u32 result, method_id = 0;
 766
 767         switch (cap) {
 768         case ACER_CAP_WIRELESS:
 769                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 770                 break;
 771         case ACER_CAP_BLUETOOTH:
 772                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 773                 break;
 774         case ACER_CAP_BRIGHTNESS:
 775                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 776                 break;
 777         case ACER_CAP_THREEG:
 778                 method_id = ACER_WMID_GET_THREEG_METHODID;
 779                 break;
 780         case ACER_CAP_MAILLED:
 781                 if (quirks->mailled == 1) {
 782                         ec_read(0x9f, &tmp);
 783                         *value = tmp & 0x1;
 784                         return 0;
 785                 }
 786         default:
 787                 return AE_ERROR;
 788         }
 789         status = WMI_execute_u32(method_id, 0, &result);
 790
 791         if (ACPI_SUCCESS(status))
 792                 *value = (u8)result;
 793
 794         return status;
 795 }
 796
 797 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 798 {
 799         u32 method_id = 0;
 800         char param;
 801
 802         switch (cap) {
 803         case ACER_CAP_BRIGHTNESS:
 804                 if (value > max_brightness)
 805                         return AE_BAD_PARAMETER;
 806                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 807                 break;
 808         case ACER_CAP_WIRELESS:
 809                 if (value > 1)
 810                         return AE_BAD_PARAMETER;
 811                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 812                 break;
 813         case ACER_CAP_BLUETOOTH:
 814                 if (value > 1)
 815                         return AE_BAD_PARAMETER;
 816                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 817                 break;
 818         case ACER_CAP_THREEG:
 819                 if (value > 1)
 820                         return AE_BAD_PARAMETER;
 821                 method_id = ACER_WMID_SET_THREEG_METHODID;
 822                 break;
 823         case ACER_CAP_MAILLED:
 824                 if (value > 1)
 825                         return AE_BAD_PARAMETER;
 826                 if (quirks->mailled == 1) {
 827                         param = value ? 0x92 : 0x93;
 828                         i8042_lock_chip();
 829                         i8042_command(&param, 0x1059);
 830                         i8042_unlock_chip();
 831                         return 0;
 832                 }
 833                 break;
 834         default:
 835                 return AE_ERROR;
 836         }
 837         return WMI_execute_u32(method_id, (u32)value, NULL);
 838 }
 839
 840 static void type_aa_dmi_decode(const struct dmi_header *header, void *dummy)
 841 {
 842         struct hotkey_function_type_aa *type_aa;
 843
 844         /* We are looking for OEM-specific Type AAh */
 845         if (header->type != 0xAA)
 846                 return;
 847
 848         has_type_aa = true;
 849         type_aa = (struct hotkey_function_type_aa *) header;
 850
 851         printk(ACER_INFO "Function bitmap for Communication Button: 0x%x\n",
 852                 type_aa->commun_func_bitmap);
 853
 854         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
 855                 interface->capability |= ACER_CAP_WIRELESS;
 856         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
 857                 interface->capability |= ACER_CAP_THREEG;
 858         if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
 859                 interface->capability |= ACER_CAP_BLUETOOTH;
 860 }
 861
 862 static acpi_status WMID_set_capabilities(void)
 863 {
 864         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 865         union acpi_object *obj;
 866         acpi_status status;
 867         u32 devices;
 868
 869         status = wmi_query_block(WMID_GUID2, 1, &out);
 870         if (ACPI_FAILURE(status))
 871                 return status;
 872
 873         obj = (union acpi_object *) out.pointer;
 874         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 875                 obj->buffer.length == sizeof(u32)) {
 876                 devices = *((u32 *) obj->buffer.pointer);
 877         } else {
 878                 kfree(out.pointer);
 879                 return AE_ERROR;
 880         }
 881
 882         dmi_walk(type_aa_dmi_decode, NULL);
 883         if (!has_type_aa) {
 884                 interface->capability |= ACER_CAP_WIRELESS;
 885                 interface->capability |= ACER_CAP_THREEG;
 886                 if (devices & 0x10)
 887                         interface->capability |= ACER_CAP_BLUETOOTH;
 888         }
 889
 890         /* WMID always provides brightness methods */
 891         interface->capability |= ACER_CAP_BRIGHTNESS;
 892
 893         if (!(devices & 0x20))
 894                 max_brightness = 0x9;
 895
 896         kfree(out.pointer);
 897         return status;
 898 }
 899
 900 static struct wmi_interface wmid_interface = {
 901         .type = ACER_WMID,
 902 };
 903
 904 /*
 905  * Generic Device (interface-independent)
 906  */
 907
 908 static acpi_status get_u32(u32 *value, u32 cap)
 909 {
 910         acpi_status status = AE_ERROR;
 911
 912         switch (interface->type) {
 913         case ACER_AMW0:
 914                 status = AMW0_get_u32(value, cap, interface);
 915                 break;
 916         case ACER_AMW0_V2:
 917                 if (cap == ACER_CAP_MAILLED) {
 918                         status = AMW0_get_u32(value, cap, interface);
 919                         break;
 920                 }
 921         case ACER_WMID:
 922                 status = WMID_get_u32(value, cap, interface);
 923                 break;
 924         }
 925
 926         return status;
 927 }
 928
 929 static acpi_status set_u32(u32 value, u32 cap)
 930 {
 931         acpi_status status;
 932
 933         if (interface->capability & cap) {
 934                 switch (interface->type) {
 935                 case ACER_AMW0:
 936                         return AMW0_set_u32(value, cap, interface);
 937                 case ACER_AMW0_V2:
 938                         if (cap == ACER_CAP_MAILLED)
 939                                 return AMW0_set_u32(value, cap, interface);
 940
 941                         /*
 942                          * On some models, some WMID methods don't toggle
 943                          * properly. For those cases, we want to run the AMW0
 944                          * method afterwards to be certain we've really toggled
 945                          * the device state.
 946                          */
 947                         if (cap == ACER_CAP_WIRELESS ||
 948                                 cap == ACER_CAP_BLUETOOTH) {
 949                                 status = WMID_set_u32(value, cap, interface);
 950                                 if (ACPI_FAILURE(status))
 951                                         return status;
 952
 953                                 return AMW0_set_u32(value, cap, interface);
 954                         }
 955                 case ACER_WMID:
 956                         return WMID_set_u32(value, cap, interface);
 957                 default:
 958                         return AE_BAD_PARAMETER;
 959                 }
 960         }
 961         return AE_BAD_PARAMETER;
 962 }
 963
 964 static void __init acer_commandline_init(void)
 965 {
 966         /*
 967          * These will all fail silently if the value given is invalid, or the
 968          * capability isn't available on the given interface
 969          */
 970         set_u32(mailled, ACER_CAP_MAILLED);
 971         if (!has_type_aa)
 972                 set_u32(threeg, ACER_CAP_THREEG);
 973         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 974 }
 975
 976 /*
 977  * LED device (Mail LED only, no other LEDs known yet)
 978  */
 979 static void mail_led_set(struct led_classdev *led_cdev,
 980 enum led_brightness value)
 981 {
 982         set_u32(value, ACER_CAP_MAILLED);
 983 }
 984
 985 static struct led_classdev mail_led = {
 986         .name = "acer-wmi::mail",
 987         .brightness_set = mail_led_set,
 988 };
 989
 990 static int __devinit acer_led_init(struct device *dev)
 991 {
 992         return led_classdev_register(dev, &mail_led);
 993 }
 994
 995 static void acer_led_exit(void)
 996 {
 997         led_classdev_unregister(&mail_led);
 998 }
 999
1000 /*
1001  * Backlight device
1002  */
1003 static struct backlight_device *acer_backlight_device;
1004
1005 static int read_brightness(struct backlight_device *bd)
1006 {
1007         u32 value;
1008         get_u32(&value, ACER_CAP_BRIGHTNESS);
1009         return value;
1010 }
1011
1012 static int update_bl_status(struct backlight_device *bd)
1013 {
1014         int intensity = bd->props.brightness;
1015
1016         if (bd->props.power != FB_BLANK_UNBLANK)
1017                 intensity = 0;
1018         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1019                 intensity = 0;
1020
1021         set_u32(intensity, ACER_CAP_BRIGHTNESS);
1022
1023         return 0;
1024 }
1025
1026 static const struct backlight_ops acer_bl_ops = {
1027         .get_brightness = read_brightness,
1028         .update_status = update_bl_status,
1029 };
1030
1031 static int __devinit acer_backlight_init(struct device *dev)
1032 {
1033         struct backlight_properties props;
1034         struct backlight_device *bd;
1035
1036         memset(&props, 0, sizeof(struct backlight_properties));
1037         props.max_brightness = max_brightness;
1038         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1039                                        &props);
1040         if (IS_ERR(bd)) {
1041                 printk(ACER_ERR "Could not register Acer backlight device\n");
1042                 acer_backlight_device = NULL;
1043                 return PTR_ERR(bd);
1044         }
1045
1046         acer_backlight_device = bd;
1047
1048         bd->props.power = FB_BLANK_UNBLANK;
1049         bd->props.brightness = read_brightness(bd);
1050         backlight_update_status(bd);
1051         return 0;
1052 }
1053
1054 static void acer_backlight_exit(void)
1055 {
1056         backlight_device_unregister(acer_backlight_device);
1057 }
1058
1059 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1060 {
1061         struct wmid3_gds_return_value return_value;
1062         acpi_status status;
1063         union acpi_object *obj;
1064         struct wmid3_gds_input_param params = {
1065                 .function_num = 0x1,
1066                 .hotkey_number = 0x01,
1067                 .devices = device,
1068         };
1069         struct acpi_buffer input = {
1070                 sizeof(struct wmid3_gds_input_param),
1071                 &params
1072         };
1073         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1074
1075         status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1076         if (ACPI_FAILURE(status))
1077                 return status;
1078
1079         obj = output.pointer;
1080
1081         if (!obj)
1082                 return AE_ERROR;
1083         else if (obj->type != ACPI_TYPE_BUFFER) {
1084                 kfree(obj);
1085                 return AE_ERROR;
1086         }
1087         if (obj->buffer.length != 8) {
1088                 printk(ACER_WARNING "Unknown buffer length %d\n",
1089                         obj->buffer.length);
1090                 kfree(obj);
1091                 return AE_ERROR;
1092         }
1093
1094         return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1095         kfree(obj);
1096
1097         if (return_value.error_code || return_value.ec_return_value)
1098                 printk(ACER_WARNING "Get Device Status failed: "
1099                         "0x%x - 0x%x\n", return_value.error_code,
1100                         return_value.ec_return_value);
1101         else
1102                 *value = !!(return_value.devices & device);
1103
1104         return status;
1105 }
1106
1107 static acpi_status get_device_status(u32 *value, u32 cap)
1108 {
1109         if (wmi_has_guid(WMID_GUID3)) {
1110                 u16 device;
1111
1112                 switch (cap) {
1113                 case ACER_CAP_WIRELESS:
1114                         device = ACER_WMID3_GDS_WIRELESS;
1115                         break;
1116                 case ACER_CAP_BLUETOOTH:
1117                         device = ACER_WMID3_GDS_BLUETOOTH;
1118                         break;
1119                 case ACER_CAP_THREEG:
1120                         device = ACER_WMID3_GDS_THREEG;
1121                         break;
1122                 default:
1123                         return AE_ERROR;
1124                 }
1125                 return wmid3_get_device_status(value, device);
1126
1127         } else {
1128                 return get_u32(value, cap);
1129         }
1130 }
1131
1132 /*
1133  * Rfkill devices
1134  */
1135 static void acer_rfkill_update(struct work_struct *ignored);
1136 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1137 static void acer_rfkill_update(struct work_struct *ignored)
1138 {
1139         u32 state;
1140         acpi_status status;
1141
1142         status = get_u32(&state, ACER_CAP_WIRELESS);
1143         if (ACPI_SUCCESS(status))
1144                 rfkill_set_sw_state(wireless_rfkill, !state);
1145
1146         if (has_cap(ACER_CAP_BLUETOOTH)) {
1147                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
1148                 if (ACPI_SUCCESS(status))
1149                         rfkill_set_sw_state(bluetooth_rfkill, !state);
1150         }
1151
1152         if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1153                 status = wmid3_get_device_status(&state,
1154                                 ACER_WMID3_GDS_THREEG);
1155                 if (ACPI_SUCCESS(status))
1156                         rfkill_set_sw_state(threeg_rfkill, !state);
1157         }
1158
1159         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1160 }
1161
1162 static int acer_rfkill_set(void *data, bool blocked)
1163 {
1164         acpi_status status;
1165         u32 cap = (unsigned long)data;
1166
1167         if (rfkill_inited) {
1168                 status = set_u32(!blocked, cap);
1169                 if (ACPI_FAILURE(status))
1170                         return -ENODEV;
1171         }
1172
1173         return 0;
1174 }
1175
1176 static const struct rfkill_ops acer_rfkill_ops = {
1177         .set_block = acer_rfkill_set,
1178 };
1179
1180 static struct rfkill *acer_rfkill_register(struct device *dev,
1181                                            enum rfkill_type type,
1182                                            char *name, u32 cap)
1183 {
1184         int err;
1185         struct rfkill *rfkill_dev;
1186         u32 state;
1187         acpi_status status;
1188
1189         rfkill_dev = rfkill_alloc(name, dev, type,
1190                                   &acer_rfkill_ops,
1191                                   (void *)(unsigned long)cap);
1192         if (!rfkill_dev)
1193                 return ERR_PTR(-ENOMEM);
1194
1195         status = get_device_status(&state, cap);
1196
1197         err = rfkill_register(rfkill_dev);
1198         if (err) {
1199                 rfkill_destroy(rfkill_dev);
1200                 return ERR_PTR(err);
1201         }
1202
1203         if (ACPI_SUCCESS(status))
1204                 rfkill_set_sw_state(rfkill_dev, !state);
1205
1206         return rfkill_dev;
1207 }
1208
1209 static int acer_rfkill_init(struct device *dev)
1210 {
1211         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1212                 "acer-wireless", ACER_CAP_WIRELESS);
1213         if (IS_ERR(wireless_rfkill))
1214                 return PTR_ERR(wireless_rfkill);
1215
1216         if (has_cap(ACER_CAP_BLUETOOTH)) {
1217                 bluetooth_rfkill = acer_rfkill_register(dev,
1218                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1219                         ACER_CAP_BLUETOOTH);
1220                 if (IS_ERR(bluetooth_rfkill)) {
1221                         rfkill_unregister(wireless_rfkill);
1222                         rfkill_destroy(wireless_rfkill);
1223                         return PTR_ERR(bluetooth_rfkill);
1224                 }
1225         }
1226
1227         if (has_cap(ACER_CAP_THREEG)) {
1228                 threeg_rfkill = acer_rfkill_register(dev,
1229                         RFKILL_TYPE_WWAN, "acer-threeg",
1230                         ACER_CAP_THREEG);
1231                 if (IS_ERR(threeg_rfkill)) {
1232                         rfkill_unregister(wireless_rfkill);
1233                         rfkill_destroy(wireless_rfkill);
1234                         rfkill_unregister(bluetooth_rfkill);
1235                         rfkill_destroy(bluetooth_rfkill);
1236                         return PTR_ERR(threeg_rfkill);
1237                 }
1238         }
1239
1240         rfkill_inited = true;
1241
1242         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1243                 schedule_delayed_work(&acer_rfkill_work,
1244                         round_jiffies_relative(HZ));
1245
1246         return 0;
1247 }
1248
1249 static void acer_rfkill_exit(void)
1250 {
1251         if (ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID))
1252                 cancel_delayed_work_sync(&acer_rfkill_work);
1253
1254         rfkill_unregister(wireless_rfkill);
1255         rfkill_destroy(wireless_rfkill);
1256
1257         if (has_cap(ACER_CAP_BLUETOOTH)) {
1258                 rfkill_unregister(bluetooth_rfkill);
1259                 rfkill_destroy(bluetooth_rfkill);
1260         }
1261
1262         if (has_cap(ACER_CAP_THREEG)) {
1263                 rfkill_unregister(threeg_rfkill);
1264                 rfkill_destroy(threeg_rfkill);
1265         }
1266         return;
1267 }
1268
1269 /*
1270  * sysfs interface
1271  */
1272 static ssize_t show_bool_threeg(struct device *dev,
1273         struct device_attribute *attr, char *buf)
1274 {
1275         u32 result; \
1276         acpi_status status;
1277         if (wmi_has_guid(WMID_GUID3))
1278                 status = wmid3_get_device_status(&result,
1279                                 ACER_WMID3_GDS_THREEG);
1280         else
1281                 status = get_u32(&result, ACER_CAP_THREEG);
1282         if (ACPI_SUCCESS(status))
1283                 return sprintf(buf, "%u\n", result);
1284         return sprintf(buf, "Read error\n");
1285 }
1286
1287 static ssize_t set_bool_threeg(struct device *dev,
1288         struct device_attribute *attr, const char *buf, size_t count)
1289 {
1290         u32 tmp = simple_strtoul(buf, NULL, 10);
1291         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1292                 if (ACPI_FAILURE(status))
1293                         return -EINVAL;
1294         return count;
1295 }
1296 static DEVICE_ATTR(threeg, S_IRUGO | S_IWUSR, show_bool_threeg,
1297         set_bool_threeg);
1298
1299 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1300         char *buf)
1301 {
1302         switch (interface->type) {
1303         case ACER_AMW0:
1304                 return sprintf(buf, "AMW0\n");
1305         case ACER_AMW0_V2:
1306                 return sprintf(buf, "AMW0 v2\n");
1307         case ACER_WMID:
1308                 return sprintf(buf, "WMID\n");
1309         default:
1310                 return sprintf(buf, "Error!\n");
1311         }
1312 }
1313
1314 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1315
1316 static void acer_wmi_notify(u32 value, void *context)
1317 {
1318         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1319         union acpi_object *obj;
1320         struct event_return_value return_value;
1321         acpi_status status;
1322         u16 device_state;
1323         const struct key_entry *key;
1324
1325         status = wmi_get_event_data(value, &response);
1326         if (status != AE_OK) {
1327                 printk(ACER_WARNING "bad event status 0x%x\n", status);
1328                 return;
1329         }
1330
1331         obj = (union acpi_object *)response.pointer;
1332
1333         if (!obj)
1334                 return;
1335         if (obj->type != ACPI_TYPE_BUFFER) {
1336                 printk(ACER_WARNING "Unknown response received %d\n",
1337                         obj->type);
1338                 kfree(obj);
1339                 return;
1340         }
1341         if (obj->buffer.length != 8) {
1342                 printk(ACER_WARNING "Unknown buffer length %d\n",
1343                         obj->buffer.length);
1344                 kfree(obj);
1345                 return;
1346         }
1347
1348         return_value = *((struct event_return_value *)obj->buffer.pointer);
1349         kfree(obj);
1350
1351         switch (return_value.function) {
1352         case WMID_HOTKEY_EVENT:
1353                 device_state = return_value.device_state;
1354                 pr_debug("device state: 0x%x\n", device_state);
1355
1356                 key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1357                                                         return_value.key_num);
1358                 if (!key) {
1359                         printk(ACER_WARNING "Unknown key number - 0x%x\n",
1360                                 return_value.key_num);
1361                 } else {
1362                         switch (key->keycode) {
1363                         case KEY_WLAN:
1364                         case KEY_BLUETOOTH:
1365                                 if (has_cap(ACER_CAP_WIRELESS))
1366                                         rfkill_set_sw_state(wireless_rfkill,
1367                                                 !(device_state & ACER_WMID3_GDS_WIRELESS));
1368                                 if (has_cap(ACER_CAP_THREEG))
1369                                         rfkill_set_sw_state(threeg_rfkill,
1370                                                 !(device_state & ACER_WMID3_GDS_THREEG));
1371                                 if (has_cap(ACER_CAP_BLUETOOTH))
1372                                         rfkill_set_sw_state(bluetooth_rfkill,
1373                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
1374                                 break;
1375                         }
1376                         sparse_keymap_report_entry(acer_wmi_input_dev, key,
1377                                                    1, true);
1378                 }
1379                 break;
1380         default:
1381                 printk(ACER_WARNING "Unknown function number - %d - %d\n",
1382                         return_value.function, return_value.key_num);
1383                 break;
1384         }
1385 }
1386
1387 static acpi_status
1388 wmid3_set_lm_mode(struct lm_input_params *params,
1389                   struct lm_return_value *return_value)
1390 {
1391         acpi_status status;
1392         union acpi_object *obj;
1393
1394         struct acpi_buffer input = { sizeof(struct lm_input_params), params };
1395         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1396
1397         status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1398         if (ACPI_FAILURE(status))
1399                 return status;
1400
1401         obj = output.pointer;
1402
1403         if (!obj)
1404                 return AE_ERROR;
1405         else if (obj->type != ACPI_TYPE_BUFFER) {
1406                 kfree(obj);
1407                 return AE_ERROR;
1408         }
1409         if (obj->buffer.length != 4) {
1410                 printk(ACER_WARNING "Unknown buffer length %d\n",
1411                        obj->buffer.length);
1412                 kfree(obj);
1413                 return AE_ERROR;
1414         }
1415
1416         *return_value = *((struct lm_return_value *)obj->buffer.pointer);
1417         kfree(obj);
1418
1419         return status;
1420 }
1421
1422 static int acer_wmi_enable_ec_raw(void)
1423 {
1424         struct lm_return_value return_value;
1425         acpi_status status;
1426         struct lm_input_params params = {
1427                 .function_num = 0x1,
1428                 .commun_devices = 0xFFFF,
1429                 .devices = 0xFFFF,
1430                 .lm_status = 0x00,            /* Launch Manager Deactive */
1431         };
1432
1433         status = wmid3_set_lm_mode(&params, &return_value);
1434
1435         if (return_value.error_code || return_value.ec_return_value)
1436                 printk(ACER_WARNING "Enabling EC raw mode failed: "
1437                        "0x%x - 0x%x\n", return_value.error_code,
1438                        return_value.ec_return_value);
1439         else
1440                 printk(ACER_INFO "Enabled EC raw mode");
1441
1442         return status;
1443 }
1444
1445 static int acer_wmi_enable_lm(void)
1446 {
1447         struct lm_return_value return_value;
1448         acpi_status status;
1449         struct lm_input_params params = {
1450                 .function_num = 0x1,
1451                 .commun_devices = 0xFFFF,
1452                 .devices = 0xFFFF,
1453                 .lm_status = 0x01,            /* Launch Manager Active */
1454         };
1455
1456         status = wmid3_set_lm_mode(&params, &return_value);
1457
1458         if (return_value.error_code || return_value.ec_return_value)
1459                 printk(ACER_WARNING "Enabling Launch Manager failed: "
1460                        "0x%x - 0x%x\n", return_value.error_code,
1461                        return_value.ec_return_value);
1462
1463         return status;
1464 }
1465
1466 static int __init acer_wmi_input_setup(void)
1467 {
1468         acpi_status status;
1469         int err;
1470
1471         acer_wmi_input_dev = input_allocate_device();
1472         if (!acer_wmi_input_dev)
1473                 return -ENOMEM;
1474
1475         acer_wmi_input_dev->name = "Acer WMI hotkeys";
1476         acer_wmi_input_dev->phys = "wmi/input0";
1477         acer_wmi_input_dev->id.bustype = BUS_HOST;
1478
1479         err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1480         if (err)
1481                 goto err_free_dev;
1482
1483         status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1484                                                 acer_wmi_notify, NULL);
1485         if (ACPI_FAILURE(status)) {
1486                 err = -EIO;
1487                 goto err_free_keymap;
1488         }
1489
1490         err = input_register_device(acer_wmi_input_dev);
1491         if (err)
1492                 goto err_uninstall_notifier;
1493
1494         return 0;
1495
1496 err_uninstall_notifier:
1497         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1498 err_free_keymap:
1499         sparse_keymap_free(acer_wmi_input_dev);
1500 err_free_dev:
1501         input_free_device(acer_wmi_input_dev);
1502         return err;
1503 }
1504
1505 static void acer_wmi_input_destroy(void)
1506 {
1507         wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
1508         sparse_keymap_free(acer_wmi_input_dev);
1509         input_unregister_device(acer_wmi_input_dev);
1510 }
1511
1512 /*
1513  * debugfs functions
1514  */
1515 static u32 get_wmid_devices(void)
1516 {
1517         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1518         union acpi_object *obj;
1519         acpi_status status;
1520         u32 devices = 0;
1521
1522         status = wmi_query_block(WMID_GUID2, 1, &out);
1523         if (ACPI_FAILURE(status))
1524                 return 0;
1525
1526         obj = (union acpi_object *) out.pointer;
1527         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1528                 obj->buffer.length == sizeof(u32)) {
1529                 devices = *((u32 *) obj->buffer.pointer);
1530         }
1531
1532         kfree(out.pointer);
1533         return devices;
1534 }
1535
1536 /*
1537  * Platform device
1538  */
1539 static int __devinit acer_platform_probe(struct platform_device *device)
1540 {
1541         int err;
1542
1543         if (has_cap(ACER_CAP_MAILLED)) {
1544                 err = acer_led_init(&device->dev);
1545                 if (err)
1546                         goto error_mailled;
1547         }
1548
1549         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1550                 err = acer_backlight_init(&device->dev);
1551                 if (err)
1552                         goto error_brightness;
1553         }
1554
1555         err = acer_rfkill_init(&device->dev);
1556         if (err)
1557                 goto error_rfkill;
1558
1559         return err;
1560
1561 error_rfkill:
1562         if (has_cap(ACER_CAP_BRIGHTNESS))
1563                 acer_backlight_exit();
1564 error_brightness:
1565         if (has_cap(ACER_CAP_MAILLED))
1566                 acer_led_exit();
1567 error_mailled:
1568         return err;
1569 }
1570
1571 static int acer_platform_remove(struct platform_device *device)
1572 {
1573         if (has_cap(ACER_CAP_MAILLED))
1574                 acer_led_exit();
1575         if (has_cap(ACER_CAP_BRIGHTNESS))
1576                 acer_backlight_exit();
1577
1578         acer_rfkill_exit();
1579         return 0;
1580 }
1581
1582 static int acer_platform_suspend(struct platform_device *dev,
1583 pm_message_t state)
1584 {
1585         u32 value;
1586         struct acer_data *data = &interface->data;
1587
1588         if (!data)
1589                 return -ENOMEM;
1590
1591         if (has_cap(ACER_CAP_MAILLED)) {
1592                 get_u32(&value, ACER_CAP_MAILLED);
1593                 data->mailled = value;
1594         }
1595
1596         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1597                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1598                 data->brightness = value;
1599         }
1600
1601         return 0;
1602 }
1603
1604 static int acer_platform_resume(struct platform_device *device)
1605 {
1606         struct acer_data *data = &interface->data;
1607
1608         if (!data)
1609                 return -ENOMEM;
1610
1611         if (has_cap(ACER_CAP_MAILLED))
1612                 set_u32(data->mailled, ACER_CAP_MAILLED);
1613
1614         if (has_cap(ACER_CAP_BRIGHTNESS))
1615                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1616
1617         return 0;
1618 }
1619
1620 static struct platform_driver acer_platform_driver = {
1621         .driver = {
1622                 .name = "acer-wmi",
1623                 .owner = THIS_MODULE,
1624         },
1625         .probe = acer_platform_probe,
1626         .remove = acer_platform_remove,
1627         .suspend = acer_platform_suspend,
1628         .resume = acer_platform_resume,
1629 };
1630
1631 static struct platform_device *acer_platform_device;
1632
1633 static int remove_sysfs(struct platform_device *device)
1634 {
1635         if (has_cap(ACER_CAP_THREEG))
1636                 device_remove_file(&device->dev, &dev_attr_threeg);
1637
1638         device_remove_file(&device->dev, &dev_attr_interface);
1639
1640         return 0;
1641 }
1642
1643 static int create_sysfs(void)
1644 {
1645         int retval = -ENOMEM;
1646
1647         if (has_cap(ACER_CAP_THREEG)) {
1648                 retval = device_create_file(&acer_platform_device->dev,
1649                         &dev_attr_threeg);
1650                 if (retval)
1651                         goto error_sysfs;
1652         }
1653
1654         retval = device_create_file(&acer_platform_device->dev,
1655                 &dev_attr_interface);
1656         if (retval)
1657                 goto error_sysfs;
1658
1659         return 0;
1660
1661 error_sysfs:
1662                 remove_sysfs(acer_platform_device);
1663         return retval;
1664 }
1665
1666 static void remove_debugfs(void)
1667 {
1668         debugfs_remove(interface->debug.devices);
1669         debugfs_remove(interface->debug.root);
1670 }
1671
1672 static int create_debugfs(void)
1673 {
1674         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1675         if (!interface->debug.root) {
1676                 printk(ACER_ERR "Failed to create debugfs directory");
1677                 return -ENOMEM;
1678         }
1679
1680         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1681                                         interface->debug.root,
1682                                         &interface->debug.wmid_devices);
1683         if (!interface->debug.devices)
1684                 goto error_debugfs;
1685
1686         return 0;
1687
1688 error_debugfs:
1689         remove_debugfs();
1690         return -ENOMEM;
1691 }
1692
1693 static int __init acer_wmi_init(void)
1694 {
1695         int err;
1696
1697         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1698
1699         if (dmi_check_system(acer_blacklist)) {
1700                 printk(ACER_INFO "Blacklisted hardware detected - "
1701                                 "not loading\n");
1702                 return -ENODEV;
1703         }
1704
1705         find_quirks();
1706
1707         /*
1708          * Detect which ACPI-WMI interface we're using.
1709          */
1710         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1711                 interface = &AMW0_V2_interface;
1712
1713         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1714                 interface = &wmid_interface;
1715
1716         if (wmi_has_guid(WMID_GUID2) && interface) {
1717                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1718                         printk(ACER_ERR "Unable to detect available WMID "
1719                                         "devices\n");
1720                         return -ENODEV;
1721                 }
1722         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1723                 printk(ACER_ERR "No WMID device detection method found\n");
1724                 return -ENODEV;
1725         }
1726
1727         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1728                 interface = &AMW0_interface;
1729
1730                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1731                         printk(ACER_ERR "Unable to detect available AMW0 "
1732                                         "devices\n");
1733                         return -ENODEV;
1734                 }
1735         }
1736
1737         if (wmi_has_guid(AMW0_GUID1))
1738                 AMW0_find_mailled();
1739
1740         if (!interface) {
1741                 printk(ACER_INFO "No or unsupported WMI interface, unable to "
1742                                 "load\n");
1743                 return -ENODEV;
1744         }
1745
1746         set_quirks();
1747
1748         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1749                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1750                 printk(ACER_INFO "Brightness must be controlled by "
1751                        "generic video driver\n");
1752         }
1753
1754         if (wmi_has_guid(WMID_GUID3)) {
1755                 if (ec_raw_mode) {
1756                         if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
1757                                 printk(ACER_ERR "Cannot enable EC raw mode\n");
1758                                 return -ENODEV;
1759                         }
1760                 } else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
1761                         printk(ACER_ERR "Cannot enable Launch Manager mode\n");
1762                         return -ENODEV;
1763                 }
1764         } else if (ec_raw_mode) {
1765                 printk(ACER_INFO "No WMID EC raw mode enable method\n");
1766         }
1767
1768         if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
1769                 err = acer_wmi_input_setup();
1770                 if (err)
1771                         return err;
1772         }
1773
1774         err = platform_driver_register(&acer_platform_driver);
1775         if (err) {
1776                 printk(ACER_ERR "Unable to register platform driver.\n");
1777                 goto error_platform_register;
1778         }
1779
1780         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1781         if (!acer_platform_device) {
1782                 err = -ENOMEM;
1783                 goto error_device_alloc;
1784         }
1785
1786         err = platform_device_add(acer_platform_device);
1787         if (err)
1788                 goto error_device_add;
1789
1790         err = create_sysfs();
1791         if (err)
1792                 goto error_create_sys;
1793
1794         if (wmi_has_guid(WMID_GUID2)) {
1795                 interface->debug.wmid_devices = get_wmid_devices();
1796                 err = create_debugfs();
1797                 if (err)
1798                         goto error_create_debugfs;
1799         }
1800
1801         /* Override any initial settings with values from the commandline */
1802         acer_commandline_init();
1803
1804         return 0;
1805
1806 error_create_debugfs:
1807         remove_sysfs(acer_platform_device);
1808 error_create_sys:
1809         platform_device_del(acer_platform_device);
1810 error_device_add:
1811         platform_device_put(acer_platform_device);
1812 error_device_alloc:
1813         platform_driver_unregister(&acer_platform_driver);
1814 error_platform_register:
1815         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1816                 acer_wmi_input_destroy();
1817
1818         return err;
1819 }
1820
1821 static void __exit acer_wmi_exit(void)
1822 {
1823         if (wmi_has_guid(ACERWMID_EVENT_GUID))
1824                 acer_wmi_input_destroy();
1825
1826         remove_sysfs(acer_platform_device);
1827         remove_debugfs();
1828         platform_device_unregister(acer_platform_device);
1829         platform_driver_unregister(&acer_platform_driver);
1830
1831         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1832         return;
1833 }
1834
1835 module_init(acer_wmi_init);
1836 module_exit(acer_wmi_exit);