drivers/platform/x86/acer-wmi.c

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