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