drivers/platform/x86/alienware-wmi.c

   1 /*
   2  * Alienware AlienFX control
   3  *
   4  * Copyright (C) 2014 Dell Inc <mario_limonciello@dell.com>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  */
  17
  18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  19
  20 #include <linux/acpi.h>
  21 #include <linux/module.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/dmi.h>
  24 #include <linux/leds.h>
  25
  26 #define LEGACY_CONTROL_GUID             "A90597CE-A997-11DA-B012-B622A1EF5492"
  27 #define LEGACY_POWER_CONTROL_GUID       "A80593CE-A997-11DA-B012-B622A1EF5492"
  28 #define WMAX_CONTROL_GUID               "A70591CE-A997-11DA-B012-B622A1EF5492"
  29
  30 #define WMAX_METHOD_HDMI_SOURCE         0x1
  31 #define WMAX_METHOD_HDMI_STATUS         0x2
  32 #define WMAX_METHOD_BRIGHTNESS          0x3
  33 #define WMAX_METHOD_ZONE_CONTROL        0x4
  34 #define WMAX_METHOD_HDMI_CABLE          0x5
  35 #define WMAX_METHOD_AMPLIFIER_CABLE     0x6
  36 #define WMAX_METHOD_DEEP_SLEEP_CONTROL  0x0B
  37 #define WMAX_METHOD_DEEP_SLEEP_STATUS   0x0C
  38
  39 MODULE_AUTHOR("Mario Limonciello <mario_limonciello@dell.com>");
  40 MODULE_DESCRIPTION("Alienware special feature control");
  41 MODULE_LICENSE("GPL");
  42 MODULE_ALIAS("wmi:" LEGACY_CONTROL_GUID);
  43 MODULE_ALIAS("wmi:" WMAX_CONTROL_GUID);
  44
  45 enum INTERFACE_FLAGS {
  46         LEGACY,
  47         WMAX,
  48 };
  49
  50 enum LEGACY_CONTROL_STATES {
  51         LEGACY_RUNNING = 1,
  52         LEGACY_BOOTING = 0,
  53         LEGACY_SUSPEND = 3,
  54 };
  55
  56 enum WMAX_CONTROL_STATES {
  57         WMAX_RUNNING = 0xFF,
  58         WMAX_BOOTING = 0,
  59         WMAX_SUSPEND = 3,
  60 };
  61
  62 struct quirk_entry {
  63         u8 num_zones;
  64         u8 hdmi_mux;
  65         u8 amplifier;
  66         u8 deepslp;
  67 };
  68
  69 static struct quirk_entry *quirks;
  70
  71
  72 static struct quirk_entry quirk_inspiron5675 = {
  73         .num_zones = 2,
  74         .hdmi_mux = 0,
  75         .amplifier = 0,
  76         .deepslp = 0,
  77 };
  78
  79 static struct quirk_entry quirk_unknown = {
  80         .num_zones = 2,
  81         .hdmi_mux = 0,
  82         .amplifier = 0,
  83         .deepslp = 0,
  84 };
  85
  86 static struct quirk_entry quirk_x51_r1_r2 = {
  87         .num_zones = 3,
  88         .hdmi_mux = 0,
  89         .amplifier = 0,
  90         .deepslp = 0,
  91 };
  92
  93 static struct quirk_entry quirk_x51_r3 = {
  94         .num_zones = 4,
  95         .hdmi_mux = 0,
  96         .amplifier = 1,
  97         .deepslp = 0,
  98 };
  99
 100 static struct quirk_entry quirk_asm100 = {
 101         .num_zones = 2,
 102         .hdmi_mux = 1,
 103         .amplifier = 0,
 104         .deepslp = 0,
 105 };
 106
 107 static struct quirk_entry quirk_asm200 = {
 108         .num_zones = 2,
 109         .hdmi_mux = 1,
 110         .amplifier = 0,
 111         .deepslp = 1,
 112 };
 113
 114 static struct quirk_entry quirk_asm201 = {
 115         .num_zones = 2,
 116         .hdmi_mux = 1,
 117         .amplifier = 1,
 118         .deepslp = 1,
 119 };
 120
 121 static int __init dmi_matched(const struct dmi_system_id *dmi)
 122 {
 123         quirks = dmi->driver_data;
 124         return 1;
 125 }
 126
 127 static const struct dmi_system_id alienware_quirks[] __initconst = {
 128         {
 129          .callback = dmi_matched,
 130          .ident = "Alienware X51 R3",
 131          .matches = {
 132                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 133                      DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R3"),
 134                      },
 135          .driver_data = &quirk_x51_r3,
 136          },
 137         {
 138          .callback = dmi_matched,
 139          .ident = "Alienware X51 R2",
 140          .matches = {
 141                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 142                      DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R2"),
 143                      },
 144          .driver_data = &quirk_x51_r1_r2,
 145          },
 146         {
 147          .callback = dmi_matched,
 148          .ident = "Alienware X51 R1",
 149          .matches = {
 150                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 151                      DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51"),
 152                      },
 153          .driver_data = &quirk_x51_r1_r2,
 154          },
 155         {
 156          .callback = dmi_matched,
 157          .ident = "Alienware ASM100",
 158          .matches = {
 159                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 160                      DMI_MATCH(DMI_PRODUCT_NAME, "ASM100"),
 161                      },
 162          .driver_data = &quirk_asm100,
 163          },
 164         {
 165          .callback = dmi_matched,
 166          .ident = "Alienware ASM200",
 167          .matches = {
 168                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 169                      DMI_MATCH(DMI_PRODUCT_NAME, "ASM200"),
 170                      },
 171          .driver_data = &quirk_asm200,
 172          },
 173         {
 174          .callback = dmi_matched,
 175          .ident = "Alienware ASM201",
 176          .matches = {
 177                      DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
 178                      DMI_MATCH(DMI_PRODUCT_NAME, "ASM201"),
 179                      },
 180          .driver_data = &quirk_asm201,
 181          },
 182          {
 183          .callback = dmi_matched,
 184          .ident = "Dell Inc. Inspiron 5675",
 185          .matches = {
 186                      DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
 187                      DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5675"),
 188                      },
 189          .driver_data = &quirk_inspiron5675,
 190          },
 191         {}
 192 };
 193
 194 struct color_platform {
 195         u8 blue;
 196         u8 green;
 197         u8 red;
 198 } __packed;
 199
 200 struct platform_zone {
 201         u8 location;
 202         struct device_attribute *attr;
 203         struct color_platform colors;
 204 };
 205
 206 struct wmax_brightness_args {
 207         u32 led_mask;
 208         u32 percentage;
 209 };
 210
 211 struct wmax_basic_args {
 212         u8 arg;
 213 };
 214
 215 struct legacy_led_args {
 216         struct color_platform colors;
 217         u8 brightness;
 218         u8 state;
 219 } __packed;
 220
 221 struct wmax_led_args {
 222         u32 led_mask;
 223         struct color_platform colors;
 224         u8 state;
 225 } __packed;
 226
 227 static struct platform_device *platform_device;
 228 static struct device_attribute *zone_dev_attrs;
 229 static struct attribute **zone_attrs;
 230 static struct platform_zone *zone_data;
 231
 232 static struct platform_driver platform_driver = {
 233         .driver = {
 234                    .name = "alienware-wmi",
 235                    }
 236 };
 237
 238 static struct attribute_group zone_attribute_group = {
 239         .name = "rgb_zones",
 240 };
 241
 242 static u8 interface;
 243 static u8 lighting_control_state;
 244 static u8 global_brightness;
 245
 246 /*
 247  * Helpers used for zone control
 248  */
 249 static int parse_rgb(const char *buf, struct platform_zone *zone)
 250 {
 251         long unsigned int rgb;
 252         int ret;
 253         union color_union {
 254                 struct color_platform cp;
 255                 int package;
 256         } repackager;
 257
 258         ret = kstrtoul(buf, 16, &rgb);
 259         if (ret)
 260                 return ret;
 261
 262         /* RGB triplet notation is 24-bit hexadecimal */
 263         if (rgb > 0xFFFFFF)
 264                 return -EINVAL;
 265
 266         repackager.package = rgb & 0x0f0f0f0f;
 267         pr_debug("alienware-wmi: r: %d g:%d b: %d\n",
 268                  repackager.cp.red, repackager.cp.green, repackager.cp.blue);
 269         zone->colors = repackager.cp;
 270         return 0;
 271 }
 272
 273 static struct platform_zone *match_zone(struct device_attribute *attr)
 274 {
 275         u8 zone;
 276
 277         for (zone = 0; zone < quirks->num_zones; zone++) {
 278                 if ((struct device_attribute *)zone_data[zone].attr == attr) {
 279                         pr_debug("alienware-wmi: matched zone location: %d\n",
 280                                  zone_data[zone].location);
 281                         return &zone_data[zone];
 282                 }
 283         }
 284         return NULL;
 285 }
 286
 287 /*
 288  * Individual RGB zone control
 289  */
 290 static int alienware_update_led(struct platform_zone *zone)
 291 {
 292         int method_id;
 293         acpi_status status;
 294         char *guid;
 295         struct acpi_buffer input;
 296         struct legacy_led_args legacy_args;
 297         struct wmax_led_args wmax_basic_args;
 298         if (interface == WMAX) {
 299                 wmax_basic_args.led_mask = 1 << zone->location;
 300                 wmax_basic_args.colors = zone->colors;
 301                 wmax_basic_args.state = lighting_control_state;
 302                 guid = WMAX_CONTROL_GUID;
 303                 method_id = WMAX_METHOD_ZONE_CONTROL;
 304
 305                 input.length = (acpi_size) sizeof(wmax_basic_args);
 306                 input.pointer = &wmax_basic_args;
 307         } else {
 308                 legacy_args.colors = zone->colors;
 309                 legacy_args.brightness = global_brightness;
 310                 legacy_args.state = 0;
 311                 if (lighting_control_state == LEGACY_BOOTING ||
 312                     lighting_control_state == LEGACY_SUSPEND) {
 313                         guid = LEGACY_POWER_CONTROL_GUID;
 314                         legacy_args.state = lighting_control_state;
 315                 } else
 316                         guid = LEGACY_CONTROL_GUID;
 317                 method_id = zone->location + 1;
 318
 319                 input.length = (acpi_size) sizeof(legacy_args);
 320                 input.pointer = &legacy_args;
 321         }
 322         pr_debug("alienware-wmi: guid %s method %d\n", guid, method_id);
 323
 324         status = wmi_evaluate_method(guid, 0, method_id, &input, NULL);
 325         if (ACPI_FAILURE(status))
 326                 pr_err("alienware-wmi: zone set failure: %u\n", status);
 327         return ACPI_FAILURE(status);
 328 }
 329
 330 static ssize_t zone_show(struct device *dev, struct device_attribute *attr,
 331                          char *buf)
 332 {
 333         struct platform_zone *target_zone;
 334         target_zone = match_zone(attr);
 335         if (target_zone == NULL)
 336                 return sprintf(buf, "red: -1, green: -1, blue: -1\n");
 337         return sprintf(buf, "red: %d, green: %d, blue: %d\n",
 338                        target_zone->colors.red,
 339                        target_zone->colors.green, target_zone->colors.blue);
 340
 341 }
 342
 343 static ssize_t zone_set(struct device *dev, struct device_attribute *attr,
 344                         const char *buf, size_t count)
 345 {
 346         struct platform_zone *target_zone;
 347         int ret;
 348         target_zone = match_zone(attr);
 349         if (target_zone == NULL) {
 350                 pr_err("alienware-wmi: invalid target zone\n");
 351                 return 1;
 352         }
 353         ret = parse_rgb(buf, target_zone);
 354         if (ret)
 355                 return ret;
 356         ret = alienware_update_led(target_zone);
 357         return ret ? ret : count;
 358 }
 359
 360 /*
 361  * LED Brightness (Global)
 362  */
 363 static int wmax_brightness(int brightness)
 364 {
 365         acpi_status status;
 366         struct acpi_buffer input;
 367         struct wmax_brightness_args args = {
 368                 .led_mask = 0xFF,
 369                 .percentage = brightness,
 370         };
 371         input.length = (acpi_size) sizeof(args);
 372         input.pointer = &args;
 373         status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 374                                      WMAX_METHOD_BRIGHTNESS, &input, NULL);
 375         if (ACPI_FAILURE(status))
 376                 pr_err("alienware-wmi: brightness set failure: %u\n", status);
 377         return ACPI_FAILURE(status);
 378 }
 379
 380 static void global_led_set(struct led_classdev *led_cdev,
 381                            enum led_brightness brightness)
 382 {
 383         int ret;
 384         global_brightness = brightness;
 385         if (interface == WMAX)
 386                 ret = wmax_brightness(brightness);
 387         else
 388                 ret = alienware_update_led(&zone_data[0]);
 389         if (ret)
 390                 pr_err("LED brightness update failed\n");
 391 }
 392
 393 static enum led_brightness global_led_get(struct led_classdev *led_cdev)
 394 {
 395         return global_brightness;
 396 }
 397
 398 static struct led_classdev global_led = {
 399         .brightness_set = global_led_set,
 400         .brightness_get = global_led_get,
 401         .name = "alienware::global_brightness",
 402 };
 403
 404 /*
 405  * Lighting control state device attribute (Global)
 406  */
 407 static ssize_t show_control_state(struct device *dev,
 408                                   struct device_attribute *attr, char *buf)
 409 {
 410         if (lighting_control_state == LEGACY_BOOTING)
 411                 return scnprintf(buf, PAGE_SIZE, "[booting] running suspend\n");
 412         else if (lighting_control_state == LEGACY_SUSPEND)
 413                 return scnprintf(buf, PAGE_SIZE, "booting running [suspend]\n");
 414         return scnprintf(buf, PAGE_SIZE, "booting [running] suspend\n");
 415 }
 416
 417 static ssize_t store_control_state(struct device *dev,
 418                                    struct device_attribute *attr,
 419                                    const char *buf, size_t count)
 420 {
 421         long unsigned int val;
 422         if (strcmp(buf, "booting\n") == 0)
 423                 val = LEGACY_BOOTING;
 424         else if (strcmp(buf, "suspend\n") == 0)
 425                 val = LEGACY_SUSPEND;
 426         else if (interface == LEGACY)
 427                 val = LEGACY_RUNNING;
 428         else
 429                 val = WMAX_RUNNING;
 430         lighting_control_state = val;
 431         pr_debug("alienware-wmi: updated control state to %d\n",
 432                  lighting_control_state);
 433         return count;
 434 }
 435
 436 static DEVICE_ATTR(lighting_control_state, 0644, show_control_state,
 437                    store_control_state);
 438
 439 static int alienware_zone_init(struct platform_device *dev)
 440 {
 441         u8 zone;
 442         char buffer[10];
 443         char *name;
 444
 445         if (interface == WMAX) {
 446                 lighting_control_state = WMAX_RUNNING;
 447         } else if (interface == LEGACY) {
 448                 lighting_control_state = LEGACY_RUNNING;
 449         }
 450         global_led.max_brightness = 0x0F;
 451         global_brightness = global_led.max_brightness;
 452
 453         /*
 454          *      - zone_dev_attrs num_zones + 1 is for individual zones and then
 455          *        null terminated
 456          *      - zone_attrs num_zones + 2 is for all attrs in zone_dev_attrs +
 457          *        the lighting control + null terminated
 458          *      - zone_data num_zones is for the distinct zones
 459          */
 460         zone_dev_attrs =
 461             kcalloc(quirks->num_zones + 1, sizeof(struct device_attribute),
 462                     GFP_KERNEL);
 463         if (!zone_dev_attrs)
 464                 return -ENOMEM;
 465
 466         zone_attrs =
 467             kcalloc(quirks->num_zones + 2, sizeof(struct attribute *),
 468                     GFP_KERNEL);
 469         if (!zone_attrs)
 470                 return -ENOMEM;
 471
 472         zone_data =
 473             kcalloc(quirks->num_zones, sizeof(struct platform_zone),
 474                     GFP_KERNEL);
 475         if (!zone_data)
 476                 return -ENOMEM;
 477
 478         for (zone = 0; zone < quirks->num_zones; zone++) {
 479                 sprintf(buffer, "zone%02hhX", zone);
 480                 name = kstrdup(buffer, GFP_KERNEL);
 481                 if (name == NULL)
 482                         return 1;
 483                 sysfs_attr_init(&zone_dev_attrs[zone].attr);
 484                 zone_dev_attrs[zone].attr.name = name;
 485                 zone_dev_attrs[zone].attr.mode = 0644;
 486                 zone_dev_attrs[zone].show = zone_show;
 487                 zone_dev_attrs[zone].store = zone_set;
 488                 zone_data[zone].location = zone;
 489                 zone_attrs[zone] = &zone_dev_attrs[zone].attr;
 490                 zone_data[zone].attr = &zone_dev_attrs[zone];
 491         }
 492         zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
 493         zone_attribute_group.attrs = zone_attrs;
 494
 495         led_classdev_register(&dev->dev, &global_led);
 496
 497         return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
 498 }
 499
 500 static void alienware_zone_exit(struct platform_device *dev)
 501 {
 502         u8 zone;
 503
 504         sysfs_remove_group(&dev->dev.kobj, &zone_attribute_group);
 505         led_classdev_unregister(&global_led);
 506         if (zone_dev_attrs) {
 507                 for (zone = 0; zone < quirks->num_zones; zone++)
 508                         kfree(zone_dev_attrs[zone].attr.name);
 509         }
 510         kfree(zone_dev_attrs);
 511         kfree(zone_data);
 512         kfree(zone_attrs);
 513 }
 514
 515 static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
 516                                           u32 command, int *out_data)
 517 {
 518         acpi_status status;
 519         union acpi_object *obj;
 520         struct acpi_buffer input;
 521         struct acpi_buffer output;
 522
 523         input.length = (acpi_size) sizeof(*in_args);
 524         input.pointer = in_args;
 525         if (out_data != NULL) {
 526                 output.length = ACPI_ALLOCATE_BUFFER;
 527                 output.pointer = NULL;
 528                 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 529                                              command, &input, &output);
 530         } else
 531                 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
 532                                              command, &input, NULL);
 533
 534         if (ACPI_SUCCESS(status) && out_data != NULL) {
 535                 obj = (union acpi_object *)output.pointer;
 536                 if (obj && obj->type == ACPI_TYPE_INTEGER)
 537                         *out_data = (u32) obj->integer.value;
 538         }
 539         kfree(output.pointer);
 540         return status;
 541
 542 }
 543
 544 /*
 545  *      The HDMI mux sysfs node indicates the status of the HDMI input mux.
 546  *      It can toggle between standard system GPU output and HDMI input.
 547  */
 548 static ssize_t show_hdmi_cable(struct device *dev,
 549                                struct device_attribute *attr, char *buf)
 550 {
 551         acpi_status status;
 552         u32 out_data;
 553         struct wmax_basic_args in_args = {
 554                 .arg = 0,
 555         };
 556         status =
 557             alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_CABLE,
 558                                    (u32 *) &out_data);
 559         if (ACPI_SUCCESS(status)) {
 560                 if (out_data == 0)
 561                         return scnprintf(buf, PAGE_SIZE,
 562                                          "[unconnected] connected unknown\n");
 563                 else if (out_data == 1)
 564                         return scnprintf(buf, PAGE_SIZE,
 565                                          "unconnected [connected] unknown\n");
 566         }
 567         pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
 568         return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
 569 }
 570
 571 static ssize_t show_hdmi_source(struct device *dev,
 572                                 struct device_attribute *attr, char *buf)
 573 {
 574         acpi_status status;
 575         u32 out_data;
 576         struct wmax_basic_args in_args = {
 577                 .arg = 0,
 578         };
 579         status =
 580             alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_STATUS,
 581                                    (u32 *) &out_data);
 582
 583         if (ACPI_SUCCESS(status)) {
 584                 if (out_data == 1)
 585                         return scnprintf(buf, PAGE_SIZE,
 586                                          "[input] gpu unknown\n");
 587                 else if (out_data == 2)
 588                         return scnprintf(buf, PAGE_SIZE,
 589                                          "input [gpu] unknown\n");
 590         }
 591         pr_err("alienware-wmi: unknown HDMI source status: %d\n", out_data);
 592         return scnprintf(buf, PAGE_SIZE, "input gpu [unknown]\n");
 593 }
 594
 595 static ssize_t toggle_hdmi_source(struct device *dev,
 596                                   struct device_attribute *attr,
 597                                   const char *buf, size_t count)
 598 {
 599         acpi_status status;
 600         struct wmax_basic_args args;
 601         if (strcmp(buf, "gpu\n") == 0)
 602                 args.arg = 1;
 603         else if (strcmp(buf, "input\n") == 0)
 604                 args.arg = 2;
 605         else
 606                 args.arg = 3;
 607         pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
 608
 609         status = alienware_wmax_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
 610
 611         if (ACPI_FAILURE(status))
 612                 pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
 613                        status);
 614         return count;
 615 }
 616
 617 static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
 618 static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
 619                    toggle_hdmi_source);
 620
 621 static struct attribute *hdmi_attrs[] = {
 622         &dev_attr_cable.attr,
 623         &dev_attr_source.attr,
 624         NULL,
 625 };
 626
 627 static const struct attribute_group hdmi_attribute_group = {
 628         .name = "hdmi",
 629         .attrs = hdmi_attrs,
 630 };
 631
 632 static void remove_hdmi(struct platform_device *dev)
 633 {
 634         if (quirks->hdmi_mux > 0)
 635                 sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
 636 }
 637
 638 static int create_hdmi(struct platform_device *dev)
 639 {
 640         int ret;
 641
 642         ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
 643         if (ret)
 644                 remove_hdmi(dev);
 645         return ret;
 646 }
 647
 648 /*
 649  * Alienware GFX amplifier support
 650  * - Currently supports reading cable status
 651  * - Leaving expansion room to possibly support dock/undock events later
 652  */
 653 static ssize_t show_amplifier_status(struct device *dev,
 654                                      struct device_attribute *attr, char *buf)
 655 {
 656         acpi_status status;
 657         u32 out_data;
 658         struct wmax_basic_args in_args = {
 659                 .arg = 0,
 660         };
 661         status =
 662             alienware_wmax_command(&in_args, WMAX_METHOD_AMPLIFIER_CABLE,
 663                                    (u32 *) &out_data);
 664         if (ACPI_SUCCESS(status)) {
 665                 if (out_data == 0)
 666                         return scnprintf(buf, PAGE_SIZE,
 667                                          "[unconnected] connected unknown\n");
 668                 else if (out_data == 1)
 669                         return scnprintf(buf, PAGE_SIZE,
 670                                          "unconnected [connected] unknown\n");
 671         }
 672         pr_err("alienware-wmi: unknown amplifier cable status: %d\n", status);
 673         return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
 674 }
 675
 676 static DEVICE_ATTR(status, S_IRUGO, show_amplifier_status, NULL);
 677
 678 static struct attribute *amplifier_attrs[] = {
 679         &dev_attr_status.attr,
 680         NULL,
 681 };
 682
 683 static const struct attribute_group amplifier_attribute_group = {
 684         .name = "amplifier",
 685         .attrs = amplifier_attrs,
 686 };
 687
 688 static void remove_amplifier(struct platform_device *dev)
 689 {
 690         if (quirks->amplifier > 0)
 691                 sysfs_remove_group(&dev->dev.kobj, &amplifier_attribute_group);
 692 }
 693
 694 static int create_amplifier(struct platform_device *dev)
 695 {
 696         int ret;
 697
 698         ret = sysfs_create_group(&dev->dev.kobj, &amplifier_attribute_group);
 699         if (ret)
 700                 remove_amplifier(dev);
 701         return ret;
 702 }
 703
 704 /*
 705  * Deep Sleep Control support
 706  * - Modifies BIOS setting for deep sleep control allowing extra wakeup events
 707  */
 708 static ssize_t show_deepsleep_status(struct device *dev,
 709                                      struct device_attribute *attr, char *buf)
 710 {
 711         acpi_status status;
 712         u32 out_data;
 713         struct wmax_basic_args in_args = {
 714                 .arg = 0,
 715         };
 716         status = alienware_wmax_command(&in_args, WMAX_METHOD_DEEP_SLEEP_STATUS,
 717                                         (u32 *) &out_data);
 718         if (ACPI_SUCCESS(status)) {
 719                 if (out_data == 0)
 720                         return scnprintf(buf, PAGE_SIZE,
 721                                          "[disabled] s5 s5_s4\n");
 722                 else if (out_data == 1)
 723                         return scnprintf(buf, PAGE_SIZE,
 724                                          "disabled [s5] s5_s4\n");
 725                 else if (out_data == 2)
 726                         return scnprintf(buf, PAGE_SIZE,
 727                                          "disabled s5 [s5_s4]\n");
 728         }
 729         pr_err("alienware-wmi: unknown deep sleep status: %d\n", status);
 730         return scnprintf(buf, PAGE_SIZE, "disabled s5 s5_s4 [unknown]\n");
 731 }
 732
 733 static ssize_t toggle_deepsleep(struct device *dev,
 734                                 struct device_attribute *attr,
 735                                 const char *buf, size_t count)
 736 {
 737         acpi_status status;
 738         struct wmax_basic_args args;
 739
 740         if (strcmp(buf, "disabled\n") == 0)
 741                 args.arg = 0;
 742         else if (strcmp(buf, "s5\n") == 0)
 743                 args.arg = 1;
 744         else
 745                 args.arg = 2;
 746         pr_debug("alienware-wmi: setting deep sleep to %d : %s", args.arg, buf);
 747
 748         status = alienware_wmax_command(&args, WMAX_METHOD_DEEP_SLEEP_CONTROL,
 749                                         NULL);
 750
 751         if (ACPI_FAILURE(status))
 752                 pr_err("alienware-wmi: deep sleep control failed: results: %u\n",
 753                         status);
 754         return count;
 755 }
 756
 757 static DEVICE_ATTR(deepsleep, S_IRUGO | S_IWUSR, show_deepsleep_status, toggle_deepsleep);
 758
 759 static struct attribute *deepsleep_attrs[] = {
 760         &dev_attr_deepsleep.attr,
 761         NULL,
 762 };
 763
 764 static const struct attribute_group deepsleep_attribute_group = {
 765         .name = "deepsleep",
 766         .attrs = deepsleep_attrs,
 767 };
 768
 769 static void remove_deepsleep(struct platform_device *dev)
 770 {
 771         if (quirks->deepslp > 0)
 772                 sysfs_remove_group(&dev->dev.kobj, &deepsleep_attribute_group);
 773 }
 774
 775 static int create_deepsleep(struct platform_device *dev)
 776 {
 777         int ret;
 778
 779         ret = sysfs_create_group(&dev->dev.kobj, &deepsleep_attribute_group);
 780         if (ret)
 781                 remove_deepsleep(dev);
 782         return ret;
 783 }
 784
 785 static int __init alienware_wmi_init(void)
 786 {
 787         int ret;
 788
 789         if (wmi_has_guid(LEGACY_CONTROL_GUID))
 790                 interface = LEGACY;
 791         else if (wmi_has_guid(WMAX_CONTROL_GUID))
 792                 interface = WMAX;
 793         else {
 794                 pr_warn("alienware-wmi: No known WMI GUID found\n");
 795                 return -ENODEV;
 796         }
 797
 798         dmi_check_system(alienware_quirks);
 799         if (quirks == NULL)
 800                 quirks = &quirk_unknown;
 801
 802         ret = platform_driver_register(&platform_driver);
 803         if (ret)
 804                 goto fail_platform_driver;
 805         platform_device = platform_device_alloc("alienware-wmi", -1);
 806         if (!platform_device) {
 807                 ret = -ENOMEM;
 808                 goto fail_platform_device1;
 809         }
 810         ret = platform_device_add(platform_device);
 811         if (ret)
 812                 goto fail_platform_device2;
 813
 814         if (quirks->hdmi_mux > 0) {
 815                 ret = create_hdmi(platform_device);
 816                 if (ret)
 817                         goto fail_prep_hdmi;
 818         }
 819
 820         if (quirks->amplifier > 0) {
 821                 ret = create_amplifier(platform_device);
 822                 if (ret)
 823                         goto fail_prep_amplifier;
 824         }
 825
 826         if (quirks->deepslp > 0) {
 827                 ret = create_deepsleep(platform_device);
 828                 if (ret)
 829                         goto fail_prep_deepsleep;
 830         }
 831
 832         ret = alienware_zone_init(platform_device);
 833         if (ret)
 834                 goto fail_prep_zones;
 835
 836         return 0;
 837
 838 fail_prep_zones:
 839         alienware_zone_exit(platform_device);
 840 fail_prep_deepsleep:
 841 fail_prep_amplifier:
 842 fail_prep_hdmi:
 843         platform_device_del(platform_device);
 844 fail_platform_device2:
 845         platform_device_put(platform_device);
 846 fail_platform_device1:
 847         platform_driver_unregister(&platform_driver);
 848 fail_platform_driver:
 849         return ret;
 850 }
 851
 852 module_init(alienware_wmi_init);
 853
 854 static void __exit alienware_wmi_exit(void)
 855 {
 856         if (platform_device) {
 857                 alienware_zone_exit(platform_device);
 858                 remove_hdmi(platform_device);
 859                 platform_device_unregister(platform_device);
 860                 platform_driver_unregister(&platform_driver);
 861         }
 862 }
 863
 864 module_exit(alienware_wmi_exit);