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
  41 #include <acpi/acpi_drivers.h>
  42
  43 MODULE_AUTHOR("Carlos Corbacho");
  44 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
  45 MODULE_LICENSE("GPL");
  46
  47 #define ACER_LOGPREFIX "acer-wmi: "
  48 #define ACER_ERR KERN_ERR ACER_LOGPREFIX
  49 #define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
  50 #define ACER_INFO KERN_INFO ACER_LOGPREFIX
  51
  52 /*
  53  * The following defines quirks to get some specific functions to work
  54  * which are known to not be supported over ACPI-WMI (such as the mail LED
  55  * on WMID based Acer's)
  56  */
  57 struct acer_quirks {
  58         const char *vendor;
  59         const char *model;
  60         u16 quirks;
  61 };
  62
  63 /*
  64  * Magic Number
  65  * Meaning is unknown - this number is required for writing to ACPI for AMW0
  66  * (it's also used in acerhk when directly accessing the BIOS)
  67  */
  68 #define ACER_AMW0_WRITE 0x9610
  69
  70 /*
  71  * Bit masks for the AMW0 interface
  72  */
  73 #define ACER_AMW0_WIRELESS_MASK  0x35
  74 #define ACER_AMW0_BLUETOOTH_MASK 0x34
  75 #define ACER_AMW0_MAILLED_MASK   0x31
  76
  77 /*
  78  * Method IDs for WMID interface
  79  */
  80 #define ACER_WMID_GET_WIRELESS_METHODID         1
  81 #define ACER_WMID_GET_BLUETOOTH_METHODID        2
  82 #define ACER_WMID_GET_BRIGHTNESS_METHODID       3
  83 #define ACER_WMID_SET_WIRELESS_METHODID         4
  84 #define ACER_WMID_SET_BLUETOOTH_METHODID        5
  85 #define ACER_WMID_SET_BRIGHTNESS_METHODID       6
  86 #define ACER_WMID_GET_THREEG_METHODID           10
  87 #define ACER_WMID_SET_THREEG_METHODID           11
  88
  89 /*
  90  * Acer ACPI method GUIDs
  91  */
  92 #define AMW0_GUID1              "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
  93 #define AMW0_GUID2              "431F16ED-0C2B-444C-B267-27DEB140CF9C"
  94 #define WMID_GUID1              "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
  95 #define WMID_GUID2              "95764E09-FB56-4e83-B31A-37761F60994A"
  96
  97 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
  98 MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
  99
 100 /*
 101  * Interface capability flags
 102  */
 103 #define ACER_CAP_MAILLED                (1<<0)
 104 #define ACER_CAP_WIRELESS               (1<<1)
 105 #define ACER_CAP_BLUETOOTH              (1<<2)
 106 #define ACER_CAP_BRIGHTNESS             (1<<3)
 107 #define ACER_CAP_THREEG                 (1<<4)
 108 #define ACER_CAP_ANY                    (0xFFFFFFFF)
 109
 110 /*
 111  * Interface type flags
 112  */
 113 enum interface_flags {
 114         ACER_AMW0,
 115         ACER_AMW0_V2,
 116         ACER_WMID,
 117 };
 118
 119 #define ACER_DEFAULT_WIRELESS  0
 120 #define ACER_DEFAULT_BLUETOOTH 0
 121 #define ACER_DEFAULT_MAILLED   0
 122 #define ACER_DEFAULT_THREEG    0
 123
 124 static int max_brightness = 0xF;
 125
 126 static int mailled = -1;
 127 static int brightness = -1;
 128 static int threeg = -1;
 129 static int force_series;
 130
 131 module_param(mailled, int, 0444);
 132 module_param(brightness, int, 0444);
 133 module_param(threeg, int, 0444);
 134 module_param(force_series, int, 0444);
 135 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
 136 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
 137 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
 138 MODULE_PARM_DESC(force_series, "Force a different laptop series");
 139
 140 struct acer_data {
 141         int mailled;
 142         int threeg;
 143         int brightness;
 144 };
 145
 146 struct acer_debug {
 147         struct dentry *root;
 148         struct dentry *devices;
 149         u32 wmid_devices;
 150 };
 151
 152 static struct rfkill *wireless_rfkill;
 153 static struct rfkill *bluetooth_rfkill;
 154
 155 /* Each low-level interface must define at least some of the following */
 156 struct wmi_interface {
 157         /* The WMI device type */
 158         u32 type;
 159
 160         /* The capabilities this interface provides */
 161         u32 capability;
 162
 163         /* Private data for the current interface */
 164         struct acer_data data;
 165
 166         /* debugfs entries associated with this interface */
 167         struct acer_debug debug;
 168 };
 169
 170 /* The static interface pointer, points to the currently detected interface */
 171 static struct wmi_interface *interface;
 172
 173 /*
 174  * Embedded Controller quirks
 175  * Some laptops require us to directly access the EC to either enable or query
 176  * features that are not available through WMI.
 177  */
 178
 179 struct quirk_entry {
 180         u8 wireless;
 181         u8 mailled;
 182         s8 brightness;
 183         u8 bluetooth;
 184 };
 185
 186 static struct quirk_entry *quirks;
 187
 188 static void set_quirks(void)
 189 {
 190         if (!interface)
 191                 return;
 192
 193         if (quirks->mailled)
 194                 interface->capability |= ACER_CAP_MAILLED;
 195
 196         if (quirks->brightness)
 197                 interface->capability |= ACER_CAP_BRIGHTNESS;
 198 }
 199
 200 static int dmi_matched(const struct dmi_system_id *dmi)
 201 {
 202         quirks = dmi->driver_data;
 203         return 1;
 204 }
 205
 206 static struct quirk_entry quirk_unknown = {
 207 };
 208
 209 static struct quirk_entry quirk_acer_aspire_1520 = {
 210         .brightness = -1,
 211 };
 212
 213 static struct quirk_entry quirk_acer_travelmate_2490 = {
 214         .mailled = 1,
 215 };
 216
 217 /* This AMW0 laptop has no bluetooth */
 218 static struct quirk_entry quirk_medion_md_98300 = {
 219         .wireless = 1,
 220 };
 221
 222 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
 223         .wireless = 2,
 224 };
 225
 226 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
 227 static struct dmi_system_id __devinitdata acer_blacklist[] = {
 228         {
 229                 .ident = "Acer Aspire One (SSD)",
 230                 .matches = {
 231                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 232                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
 233                 },
 234         },
 235         {
 236                 .ident = "Acer Aspire One (HDD)",
 237                 .matches = {
 238                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 239                         DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
 240                 },
 241         },
 242         {}
 243 };
 244
 245 static struct dmi_system_id acer_quirks[] = {
 246         {
 247                 .callback = dmi_matched,
 248                 .ident = "Acer Aspire 1360",
 249                 .matches = {
 250                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 251                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
 252                 },
 253                 .driver_data = &quirk_acer_aspire_1520,
 254         },
 255         {
 256                 .callback = dmi_matched,
 257                 .ident = "Acer Aspire 1520",
 258                 .matches = {
 259                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 260                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
 261                 },
 262                 .driver_data = &quirk_acer_aspire_1520,
 263         },
 264         {
 265                 .callback = dmi_matched,
 266                 .ident = "Acer Aspire 3100",
 267                 .matches = {
 268                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 269                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
 270                 },
 271                 .driver_data = &quirk_acer_travelmate_2490,
 272         },
 273         {
 274                 .callback = dmi_matched,
 275                 .ident = "Acer Aspire 3610",
 276                 .matches = {
 277                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 278                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
 279                 },
 280                 .driver_data = &quirk_acer_travelmate_2490,
 281         },
 282         {
 283                 .callback = dmi_matched,
 284                 .ident = "Acer Aspire 5100",
 285                 .matches = {
 286                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 287                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
 288                 },
 289                 .driver_data = &quirk_acer_travelmate_2490,
 290         },
 291         {
 292                 .callback = dmi_matched,
 293                 .ident = "Acer Aspire 5610",
 294                 .matches = {
 295                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 296                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
 297                 },
 298                 .driver_data = &quirk_acer_travelmate_2490,
 299         },
 300         {
 301                 .callback = dmi_matched,
 302                 .ident = "Acer Aspire 5630",
 303                 .matches = {
 304                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 305                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
 306                 },
 307                 .driver_data = &quirk_acer_travelmate_2490,
 308         },
 309         {
 310                 .callback = dmi_matched,
 311                 .ident = "Acer Aspire 5650",
 312                 .matches = {
 313                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 314                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
 315                 },
 316                 .driver_data = &quirk_acer_travelmate_2490,
 317         },
 318         {
 319                 .callback = dmi_matched,
 320                 .ident = "Acer Aspire 5680",
 321                 .matches = {
 322                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 323                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
 324                 },
 325                 .driver_data = &quirk_acer_travelmate_2490,
 326         },
 327         {
 328                 .callback = dmi_matched,
 329                 .ident = "Acer Aspire 9110",
 330                 .matches = {
 331                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 332                         DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
 333                 },
 334                 .driver_data = &quirk_acer_travelmate_2490,
 335         },
 336         {
 337                 .callback = dmi_matched,
 338                 .ident = "Acer TravelMate 2490",
 339                 .matches = {
 340                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 341                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
 342                 },
 343                 .driver_data = &quirk_acer_travelmate_2490,
 344         },
 345         {
 346                 .callback = dmi_matched,
 347                 .ident = "Acer TravelMate 4200",
 348                 .matches = {
 349                         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
 350                         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
 351                 },
 352                 .driver_data = &quirk_acer_travelmate_2490,
 353         },
 354         {
 355                 .callback = dmi_matched,
 356                 .ident = "Fujitsu Siemens Amilo Li 1718",
 357                 .matches = {
 358                         DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
 359                         DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
 360                 },
 361                 .driver_data = &quirk_fujitsu_amilo_li_1718,
 362         },
 363         {
 364                 .callback = dmi_matched,
 365                 .ident = "Medion MD 98300",
 366                 .matches = {
 367                         DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
 368                         DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
 369                 },
 370                 .driver_data = &quirk_medion_md_98300,
 371         },
 372         {}
 373 };
 374
 375 /* Find which quirks are needed for a particular vendor/ model pair */
 376 static void find_quirks(void)
 377 {
 378         if (!force_series) {
 379                 dmi_check_system(acer_quirks);
 380         } else if (force_series == 2490) {
 381                 quirks = &quirk_acer_travelmate_2490;
 382         }
 383
 384         if (quirks == NULL)
 385                 quirks = &quirk_unknown;
 386
 387         set_quirks();
 388 }
 389
 390 /*
 391  * General interface convenience methods
 392  */
 393
 394 static bool has_cap(u32 cap)
 395 {
 396         if ((interface->capability & cap) != 0)
 397                 return 1;
 398
 399         return 0;
 400 }
 401
 402 /*
 403  * AMW0 (V1) interface
 404  */
 405 struct wmab_args {
 406         u32 eax;
 407         u32 ebx;
 408         u32 ecx;
 409         u32 edx;
 410 };
 411
 412 struct wmab_ret {
 413         u32 eax;
 414         u32 ebx;
 415         u32 ecx;
 416         u32 edx;
 417         u32 eex;
 418 };
 419
 420 static acpi_status wmab_execute(struct wmab_args *regbuf,
 421 struct acpi_buffer *result)
 422 {
 423         struct acpi_buffer input;
 424         acpi_status status;
 425         input.length = sizeof(struct wmab_args);
 426         input.pointer = (u8 *)regbuf;
 427
 428         status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
 429
 430         return status;
 431 }
 432
 433 static acpi_status AMW0_get_u32(u32 *value, u32 cap,
 434 struct wmi_interface *iface)
 435 {
 436         int err;
 437         u8 result;
 438
 439         switch (cap) {
 440         case ACER_CAP_MAILLED:
 441                 switch (quirks->mailled) {
 442                 default:
 443                         err = ec_read(0xA, &result);
 444                         if (err)
 445                                 return AE_ERROR;
 446                         *value = (result >> 7) & 0x1;
 447                         return AE_OK;
 448                 }
 449                 break;
 450         case ACER_CAP_WIRELESS:
 451                 switch (quirks->wireless) {
 452                 case 1:
 453                         err = ec_read(0x7B, &result);
 454                         if (err)
 455                                 return AE_ERROR;
 456                         *value = result & 0x1;
 457                         return AE_OK;
 458                 case 2:
 459                         err = ec_read(0x71, &result);
 460                         if (err)
 461                                 return AE_ERROR;
 462                         *value = result & 0x1;
 463                         return AE_OK;
 464                 default:
 465                         err = ec_read(0xA, &result);
 466                         if (err)
 467                                 return AE_ERROR;
 468                         *value = (result >> 2) & 0x1;
 469                         return AE_OK;
 470                 }
 471                 break;
 472         case ACER_CAP_BLUETOOTH:
 473                 switch (quirks->bluetooth) {
 474                 default:
 475                         err = ec_read(0xA, &result);
 476                         if (err)
 477                                 return AE_ERROR;
 478                         *value = (result >> 4) & 0x1;
 479                         return AE_OK;
 480                 }
 481                 break;
 482         case ACER_CAP_BRIGHTNESS:
 483                 switch (quirks->brightness) {
 484                 default:
 485                         err = ec_read(0x83, &result);
 486                         if (err)
 487                                 return AE_ERROR;
 488                         *value = result;
 489                         return AE_OK;
 490                 }
 491                 break;
 492         default:
 493                 return AE_ERROR;
 494         }
 495         return AE_OK;
 496 }
 497
 498 static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 499 {
 500         struct wmab_args args;
 501
 502         args.eax = ACER_AMW0_WRITE;
 503         args.ebx = value ? (1<<8) : 0;
 504         args.ecx = args.edx = 0;
 505
 506         switch (cap) {
 507         case ACER_CAP_MAILLED:
 508                 if (value > 1)
 509                         return AE_BAD_PARAMETER;
 510                 args.ebx |= ACER_AMW0_MAILLED_MASK;
 511                 break;
 512         case ACER_CAP_WIRELESS:
 513                 if (value > 1)
 514                         return AE_BAD_PARAMETER;
 515                 args.ebx |= ACER_AMW0_WIRELESS_MASK;
 516                 break;
 517         case ACER_CAP_BLUETOOTH:
 518                 if (value > 1)
 519                         return AE_BAD_PARAMETER;
 520                 args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 521                 break;
 522         case ACER_CAP_BRIGHTNESS:
 523                 if (value > max_brightness)
 524                         return AE_BAD_PARAMETER;
 525                 switch (quirks->brightness) {
 526                 default:
 527                         return ec_write(0x83, value);
 528                         break;
 529                 }
 530         default:
 531                 return AE_ERROR;
 532         }
 533
 534         /* Actually do the set */
 535         return wmab_execute(&args, NULL);
 536 }
 537
 538 static acpi_status AMW0_find_mailled(void)
 539 {
 540         struct wmab_args args;
 541         struct wmab_ret ret;
 542         acpi_status status = AE_OK;
 543         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 544         union acpi_object *obj;
 545
 546         args.eax = 0x86;
 547         args.ebx = args.ecx = args.edx = 0;
 548
 549         status = wmab_execute(&args, &out);
 550         if (ACPI_FAILURE(status))
 551                 return status;
 552
 553         obj = (union acpi_object *) out.pointer;
 554         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 555         obj->buffer.length == sizeof(struct wmab_ret)) {
 556                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 557         } else {
 558                 return AE_ERROR;
 559         }
 560
 561         if (ret.eex & 0x1)
 562                 interface->capability |= ACER_CAP_MAILLED;
 563
 564         kfree(out.pointer);
 565
 566         return AE_OK;
 567 }
 568
 569 static acpi_status AMW0_set_capabilities(void)
 570 {
 571         struct wmab_args args;
 572         struct wmab_ret ret;
 573         acpi_status status = AE_OK;
 574         struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
 575         union acpi_object *obj;
 576
 577         /*
 578          * On laptops with this strange GUID (non Acer), normal probing doesn't
 579          * work.
 580          */
 581         if (wmi_has_guid(AMW0_GUID2)) {
 582                 interface->capability |= ACER_CAP_WIRELESS;
 583                 return AE_OK;
 584         }
 585
 586         args.eax = ACER_AMW0_WRITE;
 587         args.ecx = args.edx = 0;
 588
 589         args.ebx = 0xa2 << 8;
 590         args.ebx |= ACER_AMW0_WIRELESS_MASK;
 591
 592         status = wmab_execute(&args, &out);
 593         if (ACPI_FAILURE(status))
 594                 return status;
 595
 596         obj = (union acpi_object *) out.pointer;
 597         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 598         obj->buffer.length == sizeof(struct wmab_ret)) {
 599                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 600         } else {
 601                 return AE_ERROR;
 602         }
 603
 604         if (ret.eax & 0x1)
 605                 interface->capability |= ACER_CAP_WIRELESS;
 606
 607         args.ebx = 2 << 8;
 608         args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
 609
 610         status = wmab_execute(&args, &out);
 611         if (ACPI_FAILURE(status))
 612                 return status;
 613
 614         obj = (union acpi_object *) out.pointer;
 615         if (obj && obj->type == ACPI_TYPE_BUFFER
 616         && obj->buffer.length == sizeof(struct wmab_ret)) {
 617                 ret = *((struct wmab_ret *) obj->buffer.pointer);
 618         } else {
 619                 return AE_ERROR;
 620         }
 621
 622         if (ret.eax & 0x1)
 623                 interface->capability |= ACER_CAP_BLUETOOTH;
 624
 625         kfree(out.pointer);
 626
 627         /*
 628          * This appears to be safe to enable, since all Wistron based laptops
 629          * appear to use the same EC register for brightness, even if they
 630          * differ for wireless, etc
 631          */
 632         if (quirks->brightness >= 0)
 633                 interface->capability |= ACER_CAP_BRIGHTNESS;
 634
 635         return AE_OK;
 636 }
 637
 638 static struct wmi_interface AMW0_interface = {
 639         .type = ACER_AMW0,
 640 };
 641
 642 static struct wmi_interface AMW0_V2_interface = {
 643         .type = ACER_AMW0_V2,
 644 };
 645
 646 /*
 647  * New interface (The WMID interface)
 648  */
 649 static acpi_status
 650 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
 651 {
 652         struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
 653         struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
 654         union acpi_object *obj;
 655         u32 tmp;
 656         acpi_status status;
 657
 658         status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
 659
 660         if (ACPI_FAILURE(status))
 661                 return status;
 662
 663         obj = (union acpi_object *) result.pointer;
 664         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 665                 obj->buffer.length == sizeof(u32)) {
 666                 tmp = *((u32 *) obj->buffer.pointer);
 667         } else {
 668                 tmp = 0;
 669         }
 670
 671         if (out)
 672                 *out = tmp;
 673
 674         kfree(result.pointer);
 675
 676         return status;
 677 }
 678
 679 static acpi_status WMID_get_u32(u32 *value, u32 cap,
 680 struct wmi_interface *iface)
 681 {
 682         acpi_status status;
 683         u8 tmp;
 684         u32 result, method_id = 0;
 685
 686         switch (cap) {
 687         case ACER_CAP_WIRELESS:
 688                 method_id = ACER_WMID_GET_WIRELESS_METHODID;
 689                 break;
 690         case ACER_CAP_BLUETOOTH:
 691                 method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
 692                 break;
 693         case ACER_CAP_BRIGHTNESS:
 694                 method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
 695                 break;
 696         case ACER_CAP_THREEG:
 697                 method_id = ACER_WMID_GET_THREEG_METHODID;
 698                 break;
 699         case ACER_CAP_MAILLED:
 700                 if (quirks->mailled == 1) {
 701                         ec_read(0x9f, &tmp);
 702                         *value = tmp & 0x1;
 703                         return 0;
 704                 }
 705         default:
 706                 return AE_ERROR;
 707         }
 708         status = WMI_execute_u32(method_id, 0, &result);
 709
 710         if (ACPI_SUCCESS(status))
 711                 *value = (u8)result;
 712
 713         return status;
 714 }
 715
 716 static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
 717 {
 718         u32 method_id = 0;
 719         char param;
 720
 721         switch (cap) {
 722         case ACER_CAP_BRIGHTNESS:
 723                 if (value > max_brightness)
 724                         return AE_BAD_PARAMETER;
 725                 method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
 726                 break;
 727         case ACER_CAP_WIRELESS:
 728                 if (value > 1)
 729                         return AE_BAD_PARAMETER;
 730                 method_id = ACER_WMID_SET_WIRELESS_METHODID;
 731                 break;
 732         case ACER_CAP_BLUETOOTH:
 733                 if (value > 1)
 734                         return AE_BAD_PARAMETER;
 735                 method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
 736                 break;
 737         case ACER_CAP_THREEG:
 738                 if (value > 1)
 739                         return AE_BAD_PARAMETER;
 740                 method_id = ACER_WMID_SET_THREEG_METHODID;
 741                 break;
 742         case ACER_CAP_MAILLED:
 743                 if (value > 1)
 744                         return AE_BAD_PARAMETER;
 745                 if (quirks->mailled == 1) {
 746                         param = value ? 0x92 : 0x93;
 747                         i8042_lock_chip();
 748                         i8042_command(&param, 0x1059);
 749                         i8042_unlock_chip();
 750                         return 0;
 751                 }
 752                 break;
 753         default:
 754                 return AE_ERROR;
 755         }
 756         return WMI_execute_u32(method_id, (u32)value, NULL);
 757 }
 758
 759 static acpi_status WMID_set_capabilities(void)
 760 {
 761         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
 762         union acpi_object *obj;
 763         acpi_status status;
 764         u32 devices;
 765
 766         status = wmi_query_block(WMID_GUID2, 1, &out);
 767         if (ACPI_FAILURE(status))
 768                 return status;
 769
 770         obj = (union acpi_object *) out.pointer;
 771         if (obj && obj->type == ACPI_TYPE_BUFFER &&
 772                 obj->buffer.length == sizeof(u32)) {
 773                 devices = *((u32 *) obj->buffer.pointer);
 774         } else {
 775                 kfree(out.pointer);
 776                 return AE_ERROR;
 777         }
 778
 779         /* Not sure on the meaning of the relevant bits yet to detect these */
 780         interface->capability |= ACER_CAP_WIRELESS;
 781         interface->capability |= ACER_CAP_THREEG;
 782
 783         /* WMID always provides brightness methods */
 784         interface->capability |= ACER_CAP_BRIGHTNESS;
 785
 786         if (devices & 0x10)
 787                 interface->capability |= ACER_CAP_BLUETOOTH;
 788
 789         if (!(devices & 0x20))
 790                 max_brightness = 0x9;
 791
 792         kfree(out.pointer);
 793         return status;
 794 }
 795
 796 static struct wmi_interface wmid_interface = {
 797         .type = ACER_WMID,
 798 };
 799
 800 /*
 801  * Generic Device (interface-independent)
 802  */
 803
 804 static acpi_status get_u32(u32 *value, u32 cap)
 805 {
 806         acpi_status status = AE_ERROR;
 807
 808         switch (interface->type) {
 809         case ACER_AMW0:
 810                 status = AMW0_get_u32(value, cap, interface);
 811                 break;
 812         case ACER_AMW0_V2:
 813                 if (cap == ACER_CAP_MAILLED) {
 814                         status = AMW0_get_u32(value, cap, interface);
 815                         break;
 816                 }
 817         case ACER_WMID:
 818                 status = WMID_get_u32(value, cap, interface);
 819                 break;
 820         }
 821
 822         return status;
 823 }
 824
 825 static acpi_status set_u32(u32 value, u32 cap)
 826 {
 827         acpi_status status;
 828
 829         if (interface->capability & cap) {
 830                 switch (interface->type) {
 831                 case ACER_AMW0:
 832                         return AMW0_set_u32(value, cap, interface);
 833                 case ACER_AMW0_V2:
 834                         if (cap == ACER_CAP_MAILLED)
 835                                 return AMW0_set_u32(value, cap, interface);
 836
 837                         /*
 838                          * On some models, some WMID methods don't toggle
 839                          * properly. For those cases, we want to run the AMW0
 840                          * method afterwards to be certain we've really toggled
 841                          * the device state.
 842                          */
 843                         if (cap == ACER_CAP_WIRELESS ||
 844                                 cap == ACER_CAP_BLUETOOTH) {
 845                                 status = WMID_set_u32(value, cap, interface);
 846                                 if (ACPI_FAILURE(status))
 847                                         return status;
 848
 849                                 return AMW0_set_u32(value, cap, interface);
 850                         }
 851                 case ACER_WMID:
 852                         return WMID_set_u32(value, cap, interface);
 853                 default:
 854                         return AE_BAD_PARAMETER;
 855                 }
 856         }
 857         return AE_BAD_PARAMETER;
 858 }
 859
 860 static void __init acer_commandline_init(void)
 861 {
 862         /*
 863          * These will all fail silently if the value given is invalid, or the
 864          * capability isn't available on the given interface
 865          */
 866         set_u32(mailled, ACER_CAP_MAILLED);
 867         set_u32(threeg, ACER_CAP_THREEG);
 868         set_u32(brightness, ACER_CAP_BRIGHTNESS);
 869 }
 870
 871 /*
 872  * LED device (Mail LED only, no other LEDs known yet)
 873  */
 874 static void mail_led_set(struct led_classdev *led_cdev,
 875 enum led_brightness value)
 876 {
 877         set_u32(value, ACER_CAP_MAILLED);
 878 }
 879
 880 static struct led_classdev mail_led = {
 881         .name = "acer-wmi::mail",
 882         .brightness_set = mail_led_set,
 883 };
 884
 885 static int __devinit acer_led_init(struct device *dev)
 886 {
 887         return led_classdev_register(dev, &mail_led);
 888 }
 889
 890 static void acer_led_exit(void)
 891 {
 892         led_classdev_unregister(&mail_led);
 893 }
 894
 895 /*
 896  * Backlight device
 897  */
 898 static struct backlight_device *acer_backlight_device;
 899
 900 static int read_brightness(struct backlight_device *bd)
 901 {
 902         u32 value;
 903         get_u32(&value, ACER_CAP_BRIGHTNESS);
 904         return value;
 905 }
 906
 907 static int update_bl_status(struct backlight_device *bd)
 908 {
 909         int intensity = bd->props.brightness;
 910
 911         if (bd->props.power != FB_BLANK_UNBLANK)
 912                 intensity = 0;
 913         if (bd->props.fb_blank != FB_BLANK_UNBLANK)
 914                 intensity = 0;
 915
 916         set_u32(intensity, ACER_CAP_BRIGHTNESS);
 917
 918         return 0;
 919 }
 920
 921 static struct backlight_ops acer_bl_ops = {
 922         .get_brightness = read_brightness,
 923         .update_status = update_bl_status,
 924 };
 925
 926 static int __devinit acer_backlight_init(struct device *dev)
 927 {
 928         struct backlight_properties props;
 929         struct backlight_device *bd;
 930
 931         memset(&props, 0, sizeof(struct backlight_properties));
 932         props.max_brightness = max_brightness;
 933         bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
 934                                        &props);
 935         if (IS_ERR(bd)) {
 936                 printk(ACER_ERR "Could not register Acer backlight device\n");
 937                 acer_backlight_device = NULL;
 938                 return PTR_ERR(bd);
 939         }
 940
 941         acer_backlight_device = bd;
 942
 943         bd->props.power = FB_BLANK_UNBLANK;
 944         bd->props.brightness = read_brightness(bd);
 945         backlight_update_status(bd);
 946         return 0;
 947 }
 948
 949 static void acer_backlight_exit(void)
 950 {
 951         backlight_device_unregister(acer_backlight_device);
 952 }
 953
 954 /*
 955  * Rfkill devices
 956  */
 957 static void acer_rfkill_update(struct work_struct *ignored);
 958 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
 959 static void acer_rfkill_update(struct work_struct *ignored)
 960 {
 961         u32 state;
 962         acpi_status status;
 963
 964         status = get_u32(&state, ACER_CAP_WIRELESS);
 965         if (ACPI_SUCCESS(status))
 966                 rfkill_set_sw_state(wireless_rfkill, !state);
 967
 968         if (has_cap(ACER_CAP_BLUETOOTH)) {
 969                 status = get_u32(&state, ACER_CAP_BLUETOOTH);
 970                 if (ACPI_SUCCESS(status))
 971                         rfkill_set_sw_state(bluetooth_rfkill, !state);
 972         }
 973
 974         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
 975 }
 976
 977 static int acer_rfkill_set(void *data, bool blocked)
 978 {
 979         acpi_status status;
 980         u32 cap = (unsigned long)data;
 981         status = set_u32(!blocked, cap);
 982         if (ACPI_FAILURE(status))
 983                 return -ENODEV;
 984         return 0;
 985 }
 986
 987 static const struct rfkill_ops acer_rfkill_ops = {
 988         .set_block = acer_rfkill_set,
 989 };
 990
 991 static struct rfkill *acer_rfkill_register(struct device *dev,
 992                                            enum rfkill_type type,
 993                                            char *name, u32 cap)
 994 {
 995         int err;
 996         struct rfkill *rfkill_dev;
 997
 998         rfkill_dev = rfkill_alloc(name, dev, type,
 999                                   &acer_rfkill_ops,
1000                                   (void *)(unsigned long)cap);
1001         if (!rfkill_dev)
1002                 return ERR_PTR(-ENOMEM);
1003
1004         err = rfkill_register(rfkill_dev);
1005         if (err) {
1006                 rfkill_destroy(rfkill_dev);
1007                 return ERR_PTR(err);
1008         }
1009         return rfkill_dev;
1010 }
1011
1012 static int acer_rfkill_init(struct device *dev)
1013 {
1014         wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1015                 "acer-wireless", ACER_CAP_WIRELESS);
1016         if (IS_ERR(wireless_rfkill))
1017                 return PTR_ERR(wireless_rfkill);
1018
1019         if (has_cap(ACER_CAP_BLUETOOTH)) {
1020                 bluetooth_rfkill = acer_rfkill_register(dev,
1021                         RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1022                         ACER_CAP_BLUETOOTH);
1023                 if (IS_ERR(bluetooth_rfkill)) {
1024                         rfkill_unregister(wireless_rfkill);
1025                         rfkill_destroy(wireless_rfkill);
1026                         return PTR_ERR(bluetooth_rfkill);
1027                 }
1028         }
1029
1030         schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1031
1032         return 0;
1033 }
1034
1035 static void acer_rfkill_exit(void)
1036 {
1037         cancel_delayed_work_sync(&acer_rfkill_work);
1038
1039         rfkill_unregister(wireless_rfkill);
1040         rfkill_destroy(wireless_rfkill);
1041
1042         if (has_cap(ACER_CAP_BLUETOOTH)) {
1043                 rfkill_unregister(bluetooth_rfkill);
1044                 rfkill_destroy(bluetooth_rfkill);
1045         }
1046         return;
1047 }
1048
1049 /*
1050  * sysfs interface
1051  */
1052 static ssize_t show_bool_threeg(struct device *dev,
1053         struct device_attribute *attr, char *buf)
1054 {
1055         u32 result; \
1056         acpi_status status = get_u32(&result, ACER_CAP_THREEG);
1057         if (ACPI_SUCCESS(status))
1058                 return sprintf(buf, "%u\n", result);
1059         return sprintf(buf, "Read error\n");
1060 }
1061
1062 static ssize_t set_bool_threeg(struct device *dev,
1063         struct device_attribute *attr, const char *buf, size_t count)
1064 {
1065         u32 tmp = simple_strtoul(buf, NULL, 10);
1066         acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1067                 if (ACPI_FAILURE(status))
1068                         return -EINVAL;
1069         return count;
1070 }
1071 static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1072         set_bool_threeg);
1073
1074 static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1075         char *buf)
1076 {
1077         switch (interface->type) {
1078         case ACER_AMW0:
1079                 return sprintf(buf, "AMW0\n");
1080         case ACER_AMW0_V2:
1081                 return sprintf(buf, "AMW0 v2\n");
1082         case ACER_WMID:
1083                 return sprintf(buf, "WMID\n");
1084         default:
1085                 return sprintf(buf, "Error!\n");
1086         }
1087 }
1088
1089 static DEVICE_ATTR(interface, S_IRUGO, show_interface, NULL);
1090
1091 /*
1092  * debugfs functions
1093  */
1094 static u32 get_wmid_devices(void)
1095 {
1096         struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1097         union acpi_object *obj;
1098         acpi_status status;
1099         u32 devices = 0;
1100
1101         status = wmi_query_block(WMID_GUID2, 1, &out);
1102         if (ACPI_FAILURE(status))
1103                 return 0;
1104
1105         obj = (union acpi_object *) out.pointer;
1106         if (obj && obj->type == ACPI_TYPE_BUFFER &&
1107                 obj->buffer.length == sizeof(u32)) {
1108                 devices = *((u32 *) obj->buffer.pointer);
1109         }
1110
1111         kfree(out.pointer);
1112         return devices;
1113 }
1114
1115 /*
1116  * Platform device
1117  */
1118 static int __devinit acer_platform_probe(struct platform_device *device)
1119 {
1120         int err;
1121
1122         if (has_cap(ACER_CAP_MAILLED)) {
1123                 err = acer_led_init(&device->dev);
1124                 if (err)
1125                         goto error_mailled;
1126         }
1127
1128         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1129                 err = acer_backlight_init(&device->dev);
1130                 if (err)
1131                         goto error_brightness;
1132         }
1133
1134         err = acer_rfkill_init(&device->dev);
1135         if (err)
1136                 goto error_rfkill;
1137
1138         return err;
1139
1140 error_rfkill:
1141         if (has_cap(ACER_CAP_BRIGHTNESS))
1142                 acer_backlight_exit();
1143 error_brightness:
1144         if (has_cap(ACER_CAP_MAILLED))
1145                 acer_led_exit();
1146 error_mailled:
1147         return err;
1148 }
1149
1150 static int acer_platform_remove(struct platform_device *device)
1151 {
1152         if (has_cap(ACER_CAP_MAILLED))
1153                 acer_led_exit();
1154         if (has_cap(ACER_CAP_BRIGHTNESS))
1155                 acer_backlight_exit();
1156
1157         acer_rfkill_exit();
1158         return 0;
1159 }
1160
1161 static int acer_platform_suspend(struct platform_device *dev,
1162 pm_message_t state)
1163 {
1164         u32 value;
1165         struct acer_data *data = &interface->data;
1166
1167         if (!data)
1168                 return -ENOMEM;
1169
1170         if (has_cap(ACER_CAP_MAILLED)) {
1171                 get_u32(&value, ACER_CAP_MAILLED);
1172                 data->mailled = value;
1173         }
1174
1175         if (has_cap(ACER_CAP_BRIGHTNESS)) {
1176                 get_u32(&value, ACER_CAP_BRIGHTNESS);
1177                 data->brightness = value;
1178         }
1179
1180         return 0;
1181 }
1182
1183 static int acer_platform_resume(struct platform_device *device)
1184 {
1185         struct acer_data *data = &interface->data;
1186
1187         if (!data)
1188                 return -ENOMEM;
1189
1190         if (has_cap(ACER_CAP_MAILLED))
1191                 set_u32(data->mailled, ACER_CAP_MAILLED);
1192
1193         if (has_cap(ACER_CAP_BRIGHTNESS))
1194                 set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1195
1196         return 0;
1197 }
1198
1199 static struct platform_driver acer_platform_driver = {
1200         .driver = {
1201                 .name = "acer-wmi",
1202                 .owner = THIS_MODULE,
1203         },
1204         .probe = acer_platform_probe,
1205         .remove = acer_platform_remove,
1206         .suspend = acer_platform_suspend,
1207         .resume = acer_platform_resume,
1208 };
1209
1210 static struct platform_device *acer_platform_device;
1211
1212 static int remove_sysfs(struct platform_device *device)
1213 {
1214         if (has_cap(ACER_CAP_THREEG))
1215                 device_remove_file(&device->dev, &dev_attr_threeg);
1216
1217         device_remove_file(&device->dev, &dev_attr_interface);
1218
1219         return 0;
1220 }
1221
1222 static int create_sysfs(void)
1223 {
1224         int retval = -ENOMEM;
1225
1226         if (has_cap(ACER_CAP_THREEG)) {
1227                 retval = device_create_file(&acer_platform_device->dev,
1228                         &dev_attr_threeg);
1229                 if (retval)
1230                         goto error_sysfs;
1231         }
1232
1233         retval = device_create_file(&acer_platform_device->dev,
1234                 &dev_attr_interface);
1235         if (retval)
1236                 goto error_sysfs;
1237
1238         return 0;
1239
1240 error_sysfs:
1241                 remove_sysfs(acer_platform_device);
1242         return retval;
1243 }
1244
1245 static void remove_debugfs(void)
1246 {
1247         debugfs_remove(interface->debug.devices);
1248         debugfs_remove(interface->debug.root);
1249 }
1250
1251 static int create_debugfs(void)
1252 {
1253         interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1254         if (!interface->debug.root) {
1255                 printk(ACER_ERR "Failed to create debugfs directory");
1256                 return -ENOMEM;
1257         }
1258
1259         interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1260                                         interface->debug.root,
1261                                         &interface->debug.wmid_devices);
1262         if (!interface->debug.devices)
1263                 goto error_debugfs;
1264
1265         return 0;
1266
1267 error_debugfs:
1268         remove_debugfs();
1269         return -ENOMEM;
1270 }
1271
1272 static int __init acer_wmi_init(void)
1273 {
1274         int err;
1275
1276         printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1277
1278         if (dmi_check_system(acer_blacklist)) {
1279                 printk(ACER_INFO "Blacklisted hardware detected - "
1280                                 "not loading\n");
1281                 return -ENODEV;
1282         }
1283
1284         find_quirks();
1285
1286         /*
1287          * Detect which ACPI-WMI interface we're using.
1288          */
1289         if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1290                 interface = &AMW0_V2_interface;
1291
1292         if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1293                 interface = &wmid_interface;
1294
1295         if (wmi_has_guid(WMID_GUID2) && interface) {
1296                 if (ACPI_FAILURE(WMID_set_capabilities())) {
1297                         printk(ACER_ERR "Unable to detect available WMID "
1298                                         "devices\n");
1299                         return -ENODEV;
1300                 }
1301         } else if (!wmi_has_guid(WMID_GUID2) && interface) {
1302                 printk(ACER_ERR "No WMID device detection method found\n");
1303                 return -ENODEV;
1304         }
1305
1306         if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1307                 interface = &AMW0_interface;
1308
1309                 if (ACPI_FAILURE(AMW0_set_capabilities())) {
1310                         printk(ACER_ERR "Unable to detect available AMW0 "
1311                                         "devices\n");
1312                         return -ENODEV;
1313                 }
1314         }
1315
1316         if (wmi_has_guid(AMW0_GUID1))
1317                 AMW0_find_mailled();
1318
1319         if (!interface) {
1320                 printk(ACER_ERR "No or unsupported WMI interface, unable to "
1321                                 "load\n");
1322                 return -ENODEV;
1323         }
1324
1325         set_quirks();
1326
1327         if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1328                 interface->capability &= ~ACER_CAP_BRIGHTNESS;
1329                 printk(ACER_INFO "Brightness must be controlled by "
1330                        "generic video driver\n");
1331         }
1332
1333         err = platform_driver_register(&acer_platform_driver);
1334         if (err) {
1335                 printk(ACER_ERR "Unable to register platform driver.\n");
1336                 goto error_platform_register;
1337         }
1338
1339         acer_platform_device = platform_device_alloc("acer-wmi", -1);
1340         if (!acer_platform_device) {
1341                 err = -ENOMEM;
1342                 goto error_device_alloc;
1343         }
1344
1345         err = platform_device_add(acer_platform_device);
1346         if (err)
1347                 goto error_device_add;
1348
1349         err = create_sysfs();
1350         if (err)
1351                 goto error_create_sys;
1352
1353         if (wmi_has_guid(WMID_GUID2)) {
1354                 interface->debug.wmid_devices = get_wmid_devices();
1355                 err = create_debugfs();
1356                 if (err)
1357                         goto error_create_debugfs;
1358         }
1359
1360         /* Override any initial settings with values from the commandline */
1361         acer_commandline_init();
1362
1363         return 0;
1364
1365 error_create_debugfs:
1366         remove_sysfs(acer_platform_device);
1367 error_create_sys:
1368         platform_device_del(acer_platform_device);
1369 error_device_add:
1370         platform_device_put(acer_platform_device);
1371 error_device_alloc:
1372         platform_driver_unregister(&acer_platform_driver);
1373 error_platform_register:
1374         return err;
1375 }
1376
1377 static void __exit acer_wmi_exit(void)
1378 {
1379         remove_sysfs(acer_platform_device);
1380         remove_debugfs();
1381         platform_device_unregister(acer_platform_device);
1382         platform_driver_unregister(&acer_platform_driver);
1383
1384         printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1385         return;
1386 }
1387
1388 module_init(acer_wmi_init);
1389 module_exit(acer_wmi_exit);