drivers/platform/x86/acer-wmi.c

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