drivers/platform/x86/asus-wmi.c

   1 /*
   2  * Asus PC WMI hotkey driver
   3  *
   4  * Copyright(C) 2010 Intel Corporation.
   5  * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/types.h>
  33 #include <linux/slab.h>
  34 #include <linux/input.h>
  35 #include <linux/input/sparse-keymap.h>
  36 #include <linux/fb.h>
  37 #include <linux/backlight.h>
  38 #include <linux/leds.h>
  39 #include <linux/rfkill.h>
  40 #include <linux/pci.h>
  41 #include <linux/pci_hotplug.h>
  42 #include <linux/hwmon.h>
  43 #include <linux/hwmon-sysfs.h>
  44 #include <linux/debugfs.h>
  45 #include <linux/seq_file.h>
  46 #include <linux/platform_device.h>
  47 #include <linux/thermal.h>
  48 #include <linux/acpi.h>
  49 #include <acpi/video.h>
  50
  51 #include "asus-wmi.h"
  52
  53 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
  54               "Yong Wang <yong.y.wang@intel.com>");
  55 MODULE_DESCRIPTION("Asus Generic WMI Driver");
  56 MODULE_LICENSE("GPL");
  57
  58 #define to_platform_driver(drv)                                 \
  59         (container_of((drv), struct platform_driver, driver))
  60
  61 #define to_asus_wmi_driver(pdrv)                                        \
  62         (container_of((pdrv), struct asus_wmi_driver, platform_driver))
  63
  64 #define ASUS_WMI_MGMT_GUID      "97845ED0-4E6D-11DE-8A39-0800200C9A66"
  65
  66 #define NOTIFY_BRNUP_MIN                0x11
  67 #define NOTIFY_BRNUP_MAX                0x1f
  68 #define NOTIFY_BRNDOWN_MIN              0x20
  69 #define NOTIFY_BRNDOWN_MAX              0x2e
  70 #define NOTIFY_KBD_BRTUP                0xc4
  71 #define NOTIFY_KBD_BRTDWN               0xc5
  72
  73 /* WMI Methods */
  74 #define ASUS_WMI_METHODID_SPEC          0x43455053 /* BIOS SPECification */
  75 #define ASUS_WMI_METHODID_SFBD          0x44424653 /* Set First Boot Device */
  76 #define ASUS_WMI_METHODID_GLCD          0x44434C47 /* Get LCD status */
  77 #define ASUS_WMI_METHODID_GPID          0x44495047 /* Get Panel ID?? (Resol) */
  78 #define ASUS_WMI_METHODID_QMOD          0x444F4D51 /* Quiet MODe */
  79 #define ASUS_WMI_METHODID_SPLV          0x4C425053 /* Set Panel Light Value */
  80 #define ASUS_WMI_METHODID_SFUN          0x4E554653 /* FUNCtionalities */
  81 #define ASUS_WMI_METHODID_SDSP          0x50534453 /* Set DiSPlay output */
  82 #define ASUS_WMI_METHODID_GDSP          0x50534447 /* Get DiSPlay output */
  83 #define ASUS_WMI_METHODID_DEVP          0x50564544 /* DEVice Policy */
  84 #define ASUS_WMI_METHODID_OSVR          0x5256534F /* OS VeRsion */
  85 #define ASUS_WMI_METHODID_DSTS          0x53544344 /* Device STatuS */
  86 #define ASUS_WMI_METHODID_DSTS2         0x53545344 /* Device STatuS #2*/
  87 #define ASUS_WMI_METHODID_BSTS          0x53545342 /* Bios STatuS ? */
  88 #define ASUS_WMI_METHODID_DEVS          0x53564544 /* DEVice Set */
  89 #define ASUS_WMI_METHODID_CFVS          0x53564643 /* CPU Frequency Volt Set */
  90 #define ASUS_WMI_METHODID_KBFT          0x5446424B /* KeyBoard FilTer */
  91 #define ASUS_WMI_METHODID_INIT          0x54494E49 /* INITialize */
  92 #define ASUS_WMI_METHODID_HKEY          0x59454B48 /* Hot KEY ?? */
  93
  94 #define ASUS_WMI_UNSUPPORTED_METHOD     0xFFFFFFFE
  95
  96 /* Wireless */
  97 #define ASUS_WMI_DEVID_HW_SWITCH        0x00010001
  98 #define ASUS_WMI_DEVID_WIRELESS_LED     0x00010002
  99 #define ASUS_WMI_DEVID_CWAP             0x00010003
 100 #define ASUS_WMI_DEVID_WLAN             0x00010011
 101 #define ASUS_WMI_DEVID_WLAN_LED         0x00010012
 102 #define ASUS_WMI_DEVID_BLUETOOTH        0x00010013
 103 #define ASUS_WMI_DEVID_GPS              0x00010015
 104 #define ASUS_WMI_DEVID_WIMAX            0x00010017
 105 #define ASUS_WMI_DEVID_WWAN3G           0x00010019
 106 #define ASUS_WMI_DEVID_UWB              0x00010021
 107
 108 /* Leds */
 109 /* 0x000200XX and 0x000400XX */
 110 #define ASUS_WMI_DEVID_LED1             0x00020011
 111 #define ASUS_WMI_DEVID_LED2             0x00020012
 112 #define ASUS_WMI_DEVID_LED3             0x00020013
 113 #define ASUS_WMI_DEVID_LED4             0x00020014
 114 #define ASUS_WMI_DEVID_LED5             0x00020015
 115 #define ASUS_WMI_DEVID_LED6             0x00020016
 116
 117 /* Backlight and Brightness */
 118 #define ASUS_WMI_DEVID_BACKLIGHT        0x00050011
 119 #define ASUS_WMI_DEVID_BRIGHTNESS       0x00050012
 120 #define ASUS_WMI_DEVID_KBD_BACKLIGHT    0x00050021
 121 #define ASUS_WMI_DEVID_LIGHT_SENSOR     0x00050022 /* ?? */
 122
 123 /* Misc */
 124 #define ASUS_WMI_DEVID_CAMERA           0x00060013
 125
 126 /* Storage */
 127 #define ASUS_WMI_DEVID_CARDREADER       0x00080013
 128
 129 /* Input */
 130 #define ASUS_WMI_DEVID_TOUCHPAD         0x00100011
 131 #define ASUS_WMI_DEVID_TOUCHPAD_LED     0x00100012
 132
 133 /* Fan, Thermal */
 134 #define ASUS_WMI_DEVID_THERMAL_CTRL     0x00110011
 135 #define ASUS_WMI_DEVID_FAN_CTRL         0x00110012
 136
 137 /* Power */
 138 #define ASUS_WMI_DEVID_PROCESSOR_STATE  0x00120012
 139
 140 /* Deep S3 / Resume on LID open */
 141 #define ASUS_WMI_DEVID_LID_RESUME       0x00120031
 142
 143 /* DSTS masks */
 144 #define ASUS_WMI_DSTS_STATUS_BIT        0x00000001
 145 #define ASUS_WMI_DSTS_UNKNOWN_BIT       0x00000002
 146 #define ASUS_WMI_DSTS_PRESENCE_BIT      0x00010000
 147 #define ASUS_WMI_DSTS_USER_BIT          0x00020000
 148 #define ASUS_WMI_DSTS_BIOS_BIT          0x00040000
 149 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK   0x000000FF
 150 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK   0x0000FF00
 151
 152 struct bios_args {
 153         u32 arg0;
 154         u32 arg1;
 155 } __packed;
 156
 157 /*
 158  * <platform>/    - debugfs root directory
 159  *   dev_id      - current dev_id
 160  *   ctrl_param  - current ctrl_param
 161  *   method_id   - current method_id
 162  *   devs        - call DEVS(dev_id, ctrl_param) and print result
 163  *   dsts        - call DSTS(dev_id)  and print result
 164  *   call        - call method_id(dev_id, ctrl_param) and print result
 165  */
 166 struct asus_wmi_debug {
 167         struct dentry *root;
 168         u32 method_id;
 169         u32 dev_id;
 170         u32 ctrl_param;
 171 };
 172
 173 struct asus_rfkill {
 174         struct asus_wmi *asus;
 175         struct rfkill *rfkill;
 176         u32 dev_id;
 177 };
 178
 179 struct asus_wmi {
 180         int dsts_id;
 181         int spec;
 182         int sfun;
 183
 184         struct input_dev *inputdev;
 185         struct backlight_device *backlight_device;
 186         struct platform_device *platform_device;
 187
 188         struct led_classdev wlan_led;
 189         int wlan_led_wk;
 190         struct led_classdev tpd_led;
 191         int tpd_led_wk;
 192         struct led_classdev kbd_led;
 193         int kbd_led_wk;
 194         struct workqueue_struct *led_workqueue;
 195         struct work_struct tpd_led_work;
 196         struct work_struct kbd_led_work;
 197         struct work_struct wlan_led_work;
 198
 199         struct asus_rfkill wlan;
 200         struct asus_rfkill bluetooth;
 201         struct asus_rfkill wimax;
 202         struct asus_rfkill wwan3g;
 203         struct asus_rfkill gps;
 204         struct asus_rfkill uwb;
 205
 206         struct hotplug_slot *hotplug_slot;
 207         struct mutex hotplug_lock;
 208         struct mutex wmi_lock;
 209         struct workqueue_struct *hotplug_workqueue;
 210         struct work_struct hotplug_work;
 211
 212         struct asus_wmi_debug debug;
 213
 214         struct asus_wmi_driver *driver;
 215 };
 216
 217 static int asus_wmi_input_init(struct asus_wmi *asus)
 218 {
 219         int err;
 220
 221         asus->inputdev = input_allocate_device();
 222         if (!asus->inputdev)
 223                 return -ENOMEM;
 224
 225         asus->inputdev->name = asus->driver->input_name;
 226         asus->inputdev->phys = asus->driver->input_phys;
 227         asus->inputdev->id.bustype = BUS_HOST;
 228         asus->inputdev->dev.parent = &asus->platform_device->dev;
 229         set_bit(EV_REP, asus->inputdev->evbit);
 230
 231         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
 232         if (err)
 233                 goto err_free_dev;
 234
 235         err = input_register_device(asus->inputdev);
 236         if (err)
 237                 goto err_free_keymap;
 238
 239         return 0;
 240
 241 err_free_keymap:
 242         sparse_keymap_free(asus->inputdev);
 243 err_free_dev:
 244         input_free_device(asus->inputdev);
 245         return err;
 246 }
 247
 248 static void asus_wmi_input_exit(struct asus_wmi *asus)
 249 {
 250         if (asus->inputdev) {
 251                 sparse_keymap_free(asus->inputdev);
 252                 input_unregister_device(asus->inputdev);
 253         }
 254
 255         asus->inputdev = NULL;
 256 }
 257
 258 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 259                                     u32 *retval)
 260 {
 261         struct bios_args args = {
 262                 .arg0 = arg0,
 263                 .arg1 = arg1,
 264         };
 265         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
 266         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 267         acpi_status status;
 268         union acpi_object *obj;
 269         u32 tmp = 0;
 270
 271         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
 272                                      &input, &output);
 273
 274         if (ACPI_FAILURE(status))
 275                 goto exit;
 276
 277         obj = (union acpi_object *)output.pointer;
 278         if (obj && obj->type == ACPI_TYPE_INTEGER)
 279                 tmp = (u32) obj->integer.value;
 280
 281         if (retval)
 282                 *retval = tmp;
 283
 284         kfree(obj);
 285
 286 exit:
 287         if (ACPI_FAILURE(status))
 288                 return -EIO;
 289
 290         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
 291                 return -ENODEV;
 292
 293         return 0;
 294 }
 295
 296 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 297 {
 298         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
 299 }
 300
 301 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 302                                  u32 *retval)
 303 {
 304         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 305                                         ctrl_param, retval);
 306 }
 307
 308 /* Helper for special devices with magic return codes */
 309 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
 310                                       u32 dev_id, u32 mask)
 311 {
 312         u32 retval = 0;
 313         int err;
 314
 315         err = asus_wmi_get_devstate(asus, dev_id, &retval);
 316
 317         if (err < 0)
 318                 return err;
 319
 320         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
 321                 return -ENODEV;
 322
 323         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
 324                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
 325                         return -ENODEV;
 326         }
 327
 328         return retval & mask;
 329 }
 330
 331 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
 332 {
 333         return asus_wmi_get_devstate_bits(asus, dev_id,
 334                                           ASUS_WMI_DSTS_STATUS_BIT);
 335 }
 336
 337 /*
 338  * LEDs
 339  */
 340 /*
 341  * These functions actually update the LED's, and are called from a
 342  * workqueue. By doing this as separate work rather than when the LED
 343  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 344  * potentially bad time, such as a timer interrupt.
 345  */
 346 static void tpd_led_update(struct work_struct *work)
 347 {
 348         int ctrl_param;
 349         struct asus_wmi *asus;
 350
 351         asus = container_of(work, struct asus_wmi, tpd_led_work);
 352
 353         ctrl_param = asus->tpd_led_wk;
 354         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
 355 }
 356
 357 static void tpd_led_set(struct led_classdev *led_cdev,
 358                         enum led_brightness value)
 359 {
 360         struct asus_wmi *asus;
 361
 362         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 363
 364         asus->tpd_led_wk = !!value;
 365         queue_work(asus->led_workqueue, &asus->tpd_led_work);
 366 }
 367
 368 static int read_tpd_led_state(struct asus_wmi *asus)
 369 {
 370         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
 371 }
 372
 373 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 374 {
 375         struct asus_wmi *asus;
 376
 377         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 378
 379         return read_tpd_led_state(asus);
 380 }
 381
 382 static void kbd_led_update(struct work_struct *work)
 383 {
 384         int ctrl_param = 0;
 385         struct asus_wmi *asus;
 386
 387         asus = container_of(work, struct asus_wmi, kbd_led_work);
 388
 389         /*
 390          * bits 0-2: level
 391          * bit 7: light on/off
 392          */
 393         if (asus->kbd_led_wk > 0)
 394                 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
 395
 396         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
 397 }
 398
 399 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 400 {
 401         int retval;
 402
 403         /*
 404          * bits 0-2: level
 405          * bit 7: light on/off
 406          * bit 8-10: environment (0: dark, 1: normal, 2: light)
 407          * bit 17: status unknown
 408          */
 409         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
 410                                             0xFFFF);
 411
 412         /* Unknown status is considered as off */
 413         if (retval == 0x8000)
 414                 retval = 0;
 415
 416         if (retval >= 0) {
 417                 if (level)
 418                         *level = retval & 0x7F;
 419                 if (env)
 420                         *env = (retval >> 8) & 0x7F;
 421                 retval = 0;
 422         }
 423
 424         return retval;
 425 }
 426
 427 static void kbd_led_set(struct led_classdev *led_cdev,
 428                         enum led_brightness value)
 429 {
 430         struct asus_wmi *asus;
 431
 432         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 433
 434         if (value > asus->kbd_led.max_brightness)
 435                 value = asus->kbd_led.max_brightness;
 436         else if (value < 0)
 437                 value = 0;
 438
 439         asus->kbd_led_wk = value;
 440         queue_work(asus->led_workqueue, &asus->kbd_led_work);
 441 }
 442
 443 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
 444 {
 445         struct asus_wmi *asus;
 446         int retval, value;
 447
 448         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 449
 450         retval = kbd_led_read(asus, &value, NULL);
 451
 452         if (retval < 0)
 453                 return retval;
 454
 455         return value;
 456 }
 457
 458 static int wlan_led_unknown_state(struct asus_wmi *asus)
 459 {
 460         u32 result;
 461
 462         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 463
 464         return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
 465 }
 466
 467 static int wlan_led_presence(struct asus_wmi *asus)
 468 {
 469         u32 result;
 470
 471         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 472
 473         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
 474 }
 475
 476 static void wlan_led_update(struct work_struct *work)
 477 {
 478         int ctrl_param;
 479         struct asus_wmi *asus;
 480
 481         asus = container_of(work, struct asus_wmi, wlan_led_work);
 482
 483         ctrl_param = asus->wlan_led_wk;
 484         asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
 485 }
 486
 487 static void wlan_led_set(struct led_classdev *led_cdev,
 488                          enum led_brightness value)
 489 {
 490         struct asus_wmi *asus;
 491
 492         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 493
 494         asus->wlan_led_wk = !!value;
 495         queue_work(asus->led_workqueue, &asus->wlan_led_work);
 496 }
 497
 498 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
 499 {
 500         struct asus_wmi *asus;
 501         u32 result;
 502
 503         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 504         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 505
 506         return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
 507 }
 508
 509 static void asus_wmi_led_exit(struct asus_wmi *asus)
 510 {
 511         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
 512                 led_classdev_unregister(&asus->kbd_led);
 513         if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
 514                 led_classdev_unregister(&asus->tpd_led);
 515         if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
 516                 led_classdev_unregister(&asus->wlan_led);
 517         if (asus->led_workqueue)
 518                 destroy_workqueue(asus->led_workqueue);
 519 }
 520
 521 static int asus_wmi_led_init(struct asus_wmi *asus)
 522 {
 523         int rv = 0;
 524
 525         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 526         if (!asus->led_workqueue)
 527                 return -ENOMEM;
 528
 529         if (read_tpd_led_state(asus) >= 0) {
 530                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 531
 532                 asus->tpd_led.name = "asus::touchpad";
 533                 asus->tpd_led.brightness_set = tpd_led_set;
 534                 asus->tpd_led.brightness_get = tpd_led_get;
 535                 asus->tpd_led.max_brightness = 1;
 536
 537                 rv = led_classdev_register(&asus->platform_device->dev,
 538                                            &asus->tpd_led);
 539                 if (rv)
 540                         goto error;
 541         }
 542
 543         if (kbd_led_read(asus, NULL, NULL) >= 0) {
 544                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
 545
 546                 asus->kbd_led.name = "asus::kbd_backlight";
 547                 asus->kbd_led.brightness_set = kbd_led_set;
 548                 asus->kbd_led.brightness_get = kbd_led_get;
 549                 asus->kbd_led.max_brightness = 3;
 550
 551                 rv = led_classdev_register(&asus->platform_device->dev,
 552                                            &asus->kbd_led);
 553                 if (rv)
 554                         goto error;
 555         }
 556
 557         if (wlan_led_presence(asus) && (asus->driver->quirks->wapf == 4)) {
 558                 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
 559
 560                 asus->wlan_led.name = "asus::wlan";
 561                 asus->wlan_led.brightness_set = wlan_led_set;
 562                 if (!wlan_led_unknown_state(asus))
 563                         asus->wlan_led.brightness_get = wlan_led_get;
 564                 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
 565                 asus->wlan_led.max_brightness = 1;
 566                 asus->wlan_led.default_trigger = "asus-wlan";
 567
 568                 rv = led_classdev_register(&asus->platform_device->dev,
 569                                            &asus->wlan_led);
 570         }
 571
 572 error:
 573         if (rv)
 574                 asus_wmi_led_exit(asus);
 575
 576         return rv;
 577 }
 578
 579
 580 /*
 581  * PCI hotplug (for wlan rfkill)
 582  */
 583 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 584 {
 585         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 586
 587         if (result < 0)
 588                 return false;
 589         return !result;
 590 }
 591
 592 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 593 {
 594         struct pci_dev *dev;
 595         struct pci_bus *bus;
 596         bool blocked;
 597         bool absent;
 598         u32 l;
 599
 600         mutex_lock(&asus->wmi_lock);
 601         blocked = asus_wlan_rfkill_blocked(asus);
 602         mutex_unlock(&asus->wmi_lock);
 603
 604         mutex_lock(&asus->hotplug_lock);
 605         pci_lock_rescan_remove();
 606
 607         if (asus->wlan.rfkill)
 608                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 609
 610         if (asus->hotplug_slot) {
 611                 bus = pci_find_bus(0, 1);
 612                 if (!bus) {
 613                         pr_warn("Unable to find PCI bus 1?\n");
 614                         goto out_unlock;
 615                 }
 616
 617                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 618                         pr_err("Unable to read PCI config space?\n");
 619                         goto out_unlock;
 620                 }
 621                 absent = (l == 0xffffffff);
 622
 623                 if (blocked != absent) {
 624                         pr_warn("BIOS says wireless lan is %s, "
 625                                 "but the pci device is %s\n",
 626                                 blocked ? "blocked" : "unblocked",
 627                                 absent ? "absent" : "present");
 628                         pr_warn("skipped wireless hotplug as probably "
 629                                 "inappropriate for this model\n");
 630                         goto out_unlock;
 631                 }
 632
 633                 if (!blocked) {
 634                         dev = pci_get_slot(bus, 0);
 635                         if (dev) {
 636                                 /* Device already present */
 637                                 pci_dev_put(dev);
 638                                 goto out_unlock;
 639                         }
 640                         dev = pci_scan_single_device(bus, 0);
 641                         if (dev) {
 642                                 pci_bus_assign_resources(bus);
 643                                 pci_bus_add_device(dev);
 644                         }
 645                 } else {
 646                         dev = pci_get_slot(bus, 0);
 647                         if (dev) {
 648                                 pci_stop_and_remove_bus_device(dev);
 649                                 pci_dev_put(dev);
 650                         }
 651                 }
 652         }
 653
 654 out_unlock:
 655         pci_unlock_rescan_remove();
 656         mutex_unlock(&asus->hotplug_lock);
 657 }
 658
 659 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
 660 {
 661         struct asus_wmi *asus = data;
 662
 663         if (event != ACPI_NOTIFY_BUS_CHECK)
 664                 return;
 665
 666         /*
 667          * We can't call directly asus_rfkill_hotplug because most
 668          * of the time WMBC is still being executed and not reetrant.
 669          * There is currently no way to tell ACPICA that  we want this
 670          * method to be serialized, we schedule a asus_rfkill_hotplug
 671          * call later, in a safer context.
 672          */
 673         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
 674 }
 675
 676 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 677 {
 678         acpi_status status;
 679         acpi_handle handle;
 680
 681         status = acpi_get_handle(NULL, node, &handle);
 682
 683         if (ACPI_SUCCESS(status)) {
 684                 status = acpi_install_notify_handler(handle,
 685                                                      ACPI_SYSTEM_NOTIFY,
 686                                                      asus_rfkill_notify, asus);
 687                 if (ACPI_FAILURE(status))
 688                         pr_warn("Failed to register notify on %s\n", node);
 689         } else
 690                 return -ENODEV;
 691
 692         return 0;
 693 }
 694
 695 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 696 {
 697         acpi_status status = AE_OK;
 698         acpi_handle handle;
 699
 700         status = acpi_get_handle(NULL, node, &handle);
 701
 702         if (ACPI_SUCCESS(status)) {
 703                 status = acpi_remove_notify_handler(handle,
 704                                                     ACPI_SYSTEM_NOTIFY,
 705                                                     asus_rfkill_notify);
 706                 if (ACPI_FAILURE(status))
 707                         pr_err("Error removing rfkill notify handler %s\n",
 708                                node);
 709         }
 710 }
 711
 712 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
 713                                    u8 *value)
 714 {
 715         struct asus_wmi *asus = hotplug_slot->private;
 716         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 717
 718         if (result < 0)
 719                 return result;
 720
 721         *value = !!result;
 722         return 0;
 723 }
 724
 725 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 726 {
 727         kfree(hotplug_slot->info);
 728         kfree(hotplug_slot);
 729 }
 730
 731 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
 732         .owner = THIS_MODULE,
 733         .get_adapter_status = asus_get_adapter_status,
 734         .get_power_status = asus_get_adapter_status,
 735 };
 736
 737 static void asus_hotplug_work(struct work_struct *work)
 738 {
 739         struct asus_wmi *asus;
 740
 741         asus = container_of(work, struct asus_wmi, hotplug_work);
 742         asus_rfkill_hotplug(asus);
 743 }
 744
 745 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
 746 {
 747         int ret = -ENOMEM;
 748         struct pci_bus *bus = pci_find_bus(0, 1);
 749
 750         if (!bus) {
 751                 pr_err("Unable to find wifi PCI bus\n");
 752                 return -ENODEV;
 753         }
 754
 755         asus->hotplug_workqueue =
 756             create_singlethread_workqueue("hotplug_workqueue");
 757         if (!asus->hotplug_workqueue)
 758                 goto error_workqueue;
 759
 760         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
 761
 762         asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 763         if (!asus->hotplug_slot)
 764                 goto error_slot;
 765
 766         asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 767                                            GFP_KERNEL);
 768         if (!asus->hotplug_slot->info)
 769                 goto error_info;
 770
 771         asus->hotplug_slot->private = asus;
 772         asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
 773         asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
 774         asus_get_adapter_status(asus->hotplug_slot,
 775                                 &asus->hotplug_slot->info->adapter_status);
 776
 777         ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
 778         if (ret) {
 779                 pr_err("Unable to register hotplug slot - %d\n", ret);
 780                 goto error_register;
 781         }
 782
 783         return 0;
 784
 785 error_register:
 786         kfree(asus->hotplug_slot->info);
 787 error_info:
 788         kfree(asus->hotplug_slot);
 789         asus->hotplug_slot = NULL;
 790 error_slot:
 791         destroy_workqueue(asus->hotplug_workqueue);
 792 error_workqueue:
 793         return ret;
 794 }
 795
 796 /*
 797  * Rfkill devices
 798  */
 799 static int asus_rfkill_set(void *data, bool blocked)
 800 {
 801         struct asus_rfkill *priv = data;
 802         u32 ctrl_param = !blocked;
 803         u32 dev_id = priv->dev_id;
 804
 805         /*
 806          * If the user bit is set, BIOS can't set and record the wlan status,
 807          * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
 808          * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
 809          * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
 810          * while setting the wlan status through WMI.
 811          * This is also the behavior that windows app will do.
 812          */
 813         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 814              priv->asus->driver->wlan_ctrl_by_user)
 815                 dev_id = ASUS_WMI_DEVID_WLAN_LED;
 816
 817         return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
 818 }
 819
 820 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
 821 {
 822         struct asus_rfkill *priv = data;
 823         int result;
 824
 825         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
 826
 827         if (result < 0)
 828                 return;
 829
 830         rfkill_set_sw_state(priv->rfkill, !result);
 831 }
 832
 833 static int asus_rfkill_wlan_set(void *data, bool blocked)
 834 {
 835         struct asus_rfkill *priv = data;
 836         struct asus_wmi *asus = priv->asus;
 837         int ret;
 838
 839         /*
 840          * This handler is enabled only if hotplug is enabled.
 841          * In this case, the asus_wmi_set_devstate() will
 842          * trigger a wmi notification and we need to wait
 843          * this call to finish before being able to call
 844          * any wmi method
 845          */
 846         mutex_lock(&asus->wmi_lock);
 847         ret = asus_rfkill_set(data, blocked);
 848         mutex_unlock(&asus->wmi_lock);
 849         return ret;
 850 }
 851
 852 static const struct rfkill_ops asus_rfkill_wlan_ops = {
 853         .set_block = asus_rfkill_wlan_set,
 854         .query = asus_rfkill_query,
 855 };
 856
 857 static const struct rfkill_ops asus_rfkill_ops = {
 858         .set_block = asus_rfkill_set,
 859         .query = asus_rfkill_query,
 860 };
 861
 862 static int asus_new_rfkill(struct asus_wmi *asus,
 863                            struct asus_rfkill *arfkill,
 864                            const char *name, enum rfkill_type type, int dev_id)
 865 {
 866         int result = asus_wmi_get_devstate_simple(asus, dev_id);
 867         struct rfkill **rfkill = &arfkill->rfkill;
 868
 869         if (result < 0)
 870                 return result;
 871
 872         arfkill->dev_id = dev_id;
 873         arfkill->asus = asus;
 874
 875         if (dev_id == ASUS_WMI_DEVID_WLAN &&
 876             asus->driver->quirks->hotplug_wireless)
 877                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 878                                        &asus_rfkill_wlan_ops, arfkill);
 879         else
 880                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 881                                        &asus_rfkill_ops, arfkill);
 882
 883         if (!*rfkill)
 884                 return -EINVAL;
 885
 886         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 887                         (asus->driver->quirks->wapf == 4))
 888                 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
 889
 890         rfkill_init_sw_state(*rfkill, !result);
 891         result = rfkill_register(*rfkill);
 892         if (result) {
 893                 rfkill_destroy(*rfkill);
 894                 *rfkill = NULL;
 895                 return result;
 896         }
 897         return 0;
 898 }
 899
 900 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
 901 {
 902         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 903         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 904         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 905         if (asus->wlan.rfkill) {
 906                 rfkill_unregister(asus->wlan.rfkill);
 907                 rfkill_destroy(asus->wlan.rfkill);
 908                 asus->wlan.rfkill = NULL;
 909         }
 910         /*
 911          * Refresh pci hotplug in case the rfkill state was changed after
 912          * asus_unregister_rfkill_notifier()
 913          */
 914         asus_rfkill_hotplug(asus);
 915         if (asus->hotplug_slot)
 916                 pci_hp_deregister(asus->hotplug_slot);
 917         if (asus->hotplug_workqueue)
 918                 destroy_workqueue(asus->hotplug_workqueue);
 919
 920         if (asus->bluetooth.rfkill) {
 921                 rfkill_unregister(asus->bluetooth.rfkill);
 922                 rfkill_destroy(asus->bluetooth.rfkill);
 923                 asus->bluetooth.rfkill = NULL;
 924         }
 925         if (asus->wimax.rfkill) {
 926                 rfkill_unregister(asus->wimax.rfkill);
 927                 rfkill_destroy(asus->wimax.rfkill);
 928                 asus->wimax.rfkill = NULL;
 929         }
 930         if (asus->wwan3g.rfkill) {
 931                 rfkill_unregister(asus->wwan3g.rfkill);
 932                 rfkill_destroy(asus->wwan3g.rfkill);
 933                 asus->wwan3g.rfkill = NULL;
 934         }
 935         if (asus->gps.rfkill) {
 936                 rfkill_unregister(asus->gps.rfkill);
 937                 rfkill_destroy(asus->gps.rfkill);
 938                 asus->gps.rfkill = NULL;
 939         }
 940         if (asus->uwb.rfkill) {
 941                 rfkill_unregister(asus->uwb.rfkill);
 942                 rfkill_destroy(asus->uwb.rfkill);
 943                 asus->uwb.rfkill = NULL;
 944         }
 945 }
 946
 947 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
 948 {
 949         int result = 0;
 950
 951         mutex_init(&asus->hotplug_lock);
 952         mutex_init(&asus->wmi_lock);
 953
 954         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
 955                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
 956
 957         if (result && result != -ENODEV)
 958                 goto exit;
 959
 960         result = asus_new_rfkill(asus, &asus->bluetooth,
 961                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
 962                                  ASUS_WMI_DEVID_BLUETOOTH);
 963
 964         if (result && result != -ENODEV)
 965                 goto exit;
 966
 967         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
 968                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
 969
 970         if (result && result != -ENODEV)
 971                 goto exit;
 972
 973         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
 974                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
 975
 976         if (result && result != -ENODEV)
 977                 goto exit;
 978
 979         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
 980                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
 981
 982         if (result && result != -ENODEV)
 983                 goto exit;
 984
 985         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
 986                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
 987
 988         if (result && result != -ENODEV)
 989                 goto exit;
 990
 991         if (!asus->driver->quirks->hotplug_wireless)
 992                 goto exit;
 993
 994         result = asus_setup_pci_hotplug(asus);
 995         /*
 996          * If we get -EBUSY then something else is handling the PCI hotplug -
 997          * don't fail in this case
 998          */
 999         if (result == -EBUSY)
1000                 result = 0;
1001
1002         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1003         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1004         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1005         /*
1006          * Refresh pci hotplug in case the rfkill state was changed during
1007          * setup.
1008          */
1009         asus_rfkill_hotplug(asus);
1010
1011 exit:
1012         if (result && result != -ENODEV)
1013                 asus_wmi_rfkill_exit(asus);
1014
1015         if (result == -ENODEV)
1016                 result = 0;
1017
1018         return result;
1019 }
1020
1021 /*
1022  * Hwmon device
1023  */
1024 static ssize_t asus_hwmon_pwm1(struct device *dev,
1025                                struct device_attribute *attr,
1026                                char *buf)
1027 {
1028         struct asus_wmi *asus = dev_get_drvdata(dev);
1029         u32 value;
1030         int err;
1031
1032         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
1033
1034         if (err < 0)
1035                 return err;
1036
1037         value &= 0xFF;
1038
1039         if (value == 1) /* Low Speed */
1040                 value = 85;
1041         else if (value == 2)
1042                 value = 170;
1043         else if (value == 3)
1044                 value = 255;
1045         else if (value != 0) {
1046                 pr_err("Unknown fan speed %#x\n", value);
1047                 value = -1;
1048         }
1049
1050         return sprintf(buf, "%d\n", value);
1051 }
1052
1053 static ssize_t asus_hwmon_temp1(struct device *dev,
1054                                 struct device_attribute *attr,
1055                                 char *buf)
1056 {
1057         struct asus_wmi *asus = dev_get_drvdata(dev);
1058         u32 value;
1059         int err;
1060
1061         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1062
1063         if (err < 0)
1064                 return err;
1065
1066         value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1067
1068         return sprintf(buf, "%d\n", value);
1069 }
1070
1071 static DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL);
1072 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1073
1074 static struct attribute *hwmon_attributes[] = {
1075         &dev_attr_pwm1.attr,
1076         &dev_attr_temp1_input.attr,
1077         NULL
1078 };
1079
1080 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1081                                           struct attribute *attr, int idx)
1082 {
1083         struct device *dev = container_of(kobj, struct device, kobj);
1084         struct platform_device *pdev = to_platform_device(dev->parent);
1085         struct asus_wmi *asus = platform_get_drvdata(pdev);
1086         bool ok = true;
1087         int dev_id = -1;
1088         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1089
1090         if (attr == &dev_attr_pwm1.attr)
1091                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1092         else if (attr == &dev_attr_temp1_input.attr)
1093                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1094
1095         if (dev_id != -1) {
1096                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1097
1098                 if (err < 0)
1099                         return 0; /* can't return negative here */
1100         }
1101
1102         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1103                 /*
1104                  * We need to find a better way, probably using sfun,
1105                  * bits or spec ...
1106                  * Currently we disable it if:
1107                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1108                  * - reverved bits are non-zero
1109                  * - sfun and presence bit are not set
1110                  */
1111                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1112                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1113                         ok = false;
1114         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1115                 /* If value is zero, something is clearly wrong */
1116                 if (value == 0)
1117                         ok = false;
1118         }
1119
1120         return ok ? attr->mode : 0;
1121 }
1122
1123 static struct attribute_group hwmon_attribute_group = {
1124         .is_visible = asus_hwmon_sysfs_is_visible,
1125         .attrs = hwmon_attributes
1126 };
1127 __ATTRIBUTE_GROUPS(hwmon_attribute);
1128
1129 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1130 {
1131         struct device *hwmon;
1132
1133         hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1134                                                   "asus", asus,
1135                                                   hwmon_attribute_groups);
1136         if (IS_ERR(hwmon)) {
1137                 pr_err("Could not register asus hwmon device\n");
1138                 return PTR_ERR(hwmon);
1139         }
1140         return 0;
1141 }
1142
1143 /*
1144  * Backlight
1145  */
1146 static int read_backlight_power(struct asus_wmi *asus)
1147 {
1148         int ret;
1149         if (asus->driver->quirks->store_backlight_power)
1150                 ret = !asus->driver->panel_power;
1151         else
1152                 ret = asus_wmi_get_devstate_simple(asus,
1153                                                    ASUS_WMI_DEVID_BACKLIGHT);
1154
1155         if (ret < 0)
1156                 return ret;
1157
1158         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1159 }
1160
1161 static int read_brightness_max(struct asus_wmi *asus)
1162 {
1163         u32 retval;
1164         int err;
1165
1166         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1167
1168         if (err < 0)
1169                 return err;
1170
1171         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1172         retval >>= 8;
1173
1174         if (!retval)
1175                 return -ENODEV;
1176
1177         return retval;
1178 }
1179
1180 static int read_brightness(struct backlight_device *bd)
1181 {
1182         struct asus_wmi *asus = bl_get_data(bd);
1183         u32 retval;
1184         int err;
1185
1186         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1187
1188         if (err < 0)
1189                 return err;
1190
1191         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1192 }
1193
1194 static u32 get_scalar_command(struct backlight_device *bd)
1195 {
1196         struct asus_wmi *asus = bl_get_data(bd);
1197         u32 ctrl_param = 0;
1198
1199         if ((asus->driver->brightness < bd->props.brightness) ||
1200             bd->props.brightness == bd->props.max_brightness)
1201                 ctrl_param = 0x00008001;
1202         else if ((asus->driver->brightness > bd->props.brightness) ||
1203                  bd->props.brightness == 0)
1204                 ctrl_param = 0x00008000;
1205
1206         asus->driver->brightness = bd->props.brightness;
1207
1208         return ctrl_param;
1209 }
1210
1211 static int update_bl_status(struct backlight_device *bd)
1212 {
1213         struct asus_wmi *asus = bl_get_data(bd);
1214         u32 ctrl_param;
1215         int power, err = 0;
1216
1217         power = read_backlight_power(asus);
1218         if (power != -ENODEV && bd->props.power != power) {
1219                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1220                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1221                                             ctrl_param, NULL);
1222                 if (asus->driver->quirks->store_backlight_power)
1223                         asus->driver->panel_power = bd->props.power;
1224
1225                 /* When using scalar brightness, updating the brightness
1226                  * will mess with the backlight power */
1227                 if (asus->driver->quirks->scalar_panel_brightness)
1228                         return err;
1229         }
1230
1231         if (asus->driver->quirks->scalar_panel_brightness)
1232                 ctrl_param = get_scalar_command(bd);
1233         else
1234                 ctrl_param = bd->props.brightness;
1235
1236         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1237                                     ctrl_param, NULL);
1238
1239         return err;
1240 }
1241
1242 static const struct backlight_ops asus_wmi_bl_ops = {
1243         .get_brightness = read_brightness,
1244         .update_status = update_bl_status,
1245 };
1246
1247 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1248 {
1249         struct backlight_device *bd = asus->backlight_device;
1250         int old = bd->props.brightness;
1251         int new = old;
1252
1253         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1254                 new = code - NOTIFY_BRNUP_MIN + 1;
1255         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1256                 new = code - NOTIFY_BRNDOWN_MIN;
1257
1258         bd->props.brightness = new;
1259         backlight_update_status(bd);
1260         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1261
1262         return old;
1263 }
1264
1265 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1266 {
1267         struct backlight_device *bd;
1268         struct backlight_properties props;
1269         int max;
1270         int power;
1271
1272         max = read_brightness_max(asus);
1273
1274         if (max == -ENODEV)
1275                 max = 0;
1276         else if (max < 0)
1277                 return max;
1278
1279         power = read_backlight_power(asus);
1280
1281         if (power == -ENODEV)
1282                 power = FB_BLANK_UNBLANK;
1283         else if (power < 0)
1284                 return power;
1285
1286         memset(&props, 0, sizeof(struct backlight_properties));
1287         props.type = BACKLIGHT_PLATFORM;
1288         props.max_brightness = max;
1289         bd = backlight_device_register(asus->driver->name,
1290                                        &asus->platform_device->dev, asus,
1291                                        &asus_wmi_bl_ops, &props);
1292         if (IS_ERR(bd)) {
1293                 pr_err("Could not register backlight device\n");
1294                 return PTR_ERR(bd);
1295         }
1296
1297         asus->backlight_device = bd;
1298
1299         if (asus->driver->quirks->store_backlight_power)
1300                 asus->driver->panel_power = power;
1301
1302         bd->props.brightness = read_brightness(bd);
1303         bd->props.power = power;
1304         backlight_update_status(bd);
1305
1306         asus->driver->brightness = bd->props.brightness;
1307
1308         return 0;
1309 }
1310
1311 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1312 {
1313         if (asus->backlight_device)
1314                 backlight_device_unregister(asus->backlight_device);
1315
1316         asus->backlight_device = NULL;
1317 }
1318
1319 static int is_display_toggle(int code)
1320 {
1321         /* display toggle keys */
1322         if ((code >= 0x61 && code <= 0x67) ||
1323             (code >= 0x8c && code <= 0x93) ||
1324             (code >= 0xa0 && code <= 0xa7) ||
1325             (code >= 0xd0 && code <= 0xd5))
1326                 return 1;
1327
1328         return 0;
1329 }
1330
1331 static void asus_wmi_notify(u32 value, void *context)
1332 {
1333         struct asus_wmi *asus = context;
1334         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1335         union acpi_object *obj;
1336         acpi_status status;
1337         int code;
1338         int orig_code;
1339         unsigned int key_value = 1;
1340         bool autorelease = 1;
1341
1342         status = wmi_get_event_data(value, &response);
1343         if (status != AE_OK) {
1344                 pr_err("bad event status 0x%x\n", status);
1345                 return;
1346         }
1347
1348         obj = (union acpi_object *)response.pointer;
1349
1350         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1351                 goto exit;
1352
1353         code = obj->integer.value;
1354         orig_code = code;
1355
1356         if (asus->driver->key_filter) {
1357                 asus->driver->key_filter(asus->driver, &code, &key_value,
1358                                          &autorelease);
1359                 if (code == ASUS_WMI_KEY_IGNORE)
1360                         goto exit;
1361         }
1362
1363         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1364                 code = ASUS_WMI_BRN_UP;
1365         else if (code >= NOTIFY_BRNDOWN_MIN &&
1366                  code <= NOTIFY_BRNDOWN_MAX)
1367                 code = ASUS_WMI_BRN_DOWN;
1368
1369         if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1370                 if (!acpi_video_backlight_support()) {
1371                         asus_wmi_backlight_notify(asus, orig_code);
1372                         goto exit;
1373                 }
1374         }
1375
1376         if (is_display_toggle(code) &&
1377             asus->driver->quirks->no_display_toggle)
1378                 goto exit;
1379
1380         if (!sparse_keymap_report_event(asus->inputdev, code,
1381                                         key_value, autorelease))
1382                 pr_info("Unknown key %x pressed\n", code);
1383
1384 exit:
1385         kfree(obj);
1386 }
1387
1388 /*
1389  * Sys helpers
1390  */
1391 static int parse_arg(const char *buf, unsigned long count, int *val)
1392 {
1393         if (!count)
1394                 return 0;
1395         if (sscanf(buf, "%i", val) != 1)
1396                 return -EINVAL;
1397         return count;
1398 }
1399
1400 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1401                              const char *buf, size_t count)
1402 {
1403         u32 retval;
1404         int rv, err, value;
1405
1406         value = asus_wmi_get_devstate_simple(asus, devid);
1407         if (value == -ENODEV)   /* Check device presence */
1408                 return value;
1409
1410         rv = parse_arg(buf, count, &value);
1411         err = asus_wmi_set_devstate(devid, value, &retval);
1412
1413         if (err < 0)
1414                 return err;
1415
1416         return rv;
1417 }
1418
1419 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1420 {
1421         int value = asus_wmi_get_devstate_simple(asus, devid);
1422
1423         if (value < 0)
1424                 return value;
1425
1426         return sprintf(buf, "%d\n", value);
1427 }
1428
1429 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1430         static ssize_t show_##_name(struct device *dev,                 \
1431                                     struct device_attribute *attr,      \
1432                                     char *buf)                          \
1433         {                                                               \
1434                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1435                                                                         \
1436                 return show_sys_wmi(asus, _cm, buf);                    \
1437         }                                                               \
1438         static ssize_t store_##_name(struct device *dev,                \
1439                                      struct device_attribute *attr,     \
1440                                      const char *buf, size_t count)     \
1441         {                                                               \
1442                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1443                                                                         \
1444                 return store_sys_wmi(asus, _cm, buf, count);            \
1445         }                                                               \
1446         static struct device_attribute dev_attr_##_name = {             \
1447                 .attr = {                                               \
1448                         .name = __stringify(_name),                     \
1449                         .mode = _mode },                                \
1450                 .show   = show_##_name,                                 \
1451                 .store  = store_##_name,                                \
1452         }
1453
1454 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1455 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1456 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1457 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1458
1459 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1460                            const char *buf, size_t count)
1461 {
1462         int value, rv;
1463
1464         if (!count || sscanf(buf, "%i", &value) != 1)
1465                 return -EINVAL;
1466         if (value < 0 || value > 2)
1467                 return -EINVAL;
1468
1469         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1470         if (rv < 0)
1471                 return rv;
1472
1473         return count;
1474 }
1475
1476 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1477
1478 static struct attribute *platform_attributes[] = {
1479         &dev_attr_cpufv.attr,
1480         &dev_attr_camera.attr,
1481         &dev_attr_cardr.attr,
1482         &dev_attr_touchpad.attr,
1483         &dev_attr_lid_resume.attr,
1484         NULL
1485 };
1486
1487 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1488                                     struct attribute *attr, int idx)
1489 {
1490         struct device *dev = container_of(kobj, struct device, kobj);
1491         struct platform_device *pdev = to_platform_device(dev);
1492         struct asus_wmi *asus = platform_get_drvdata(pdev);
1493         bool ok = true;
1494         int devid = -1;
1495
1496         if (attr == &dev_attr_camera.attr)
1497                 devid = ASUS_WMI_DEVID_CAMERA;
1498         else if (attr == &dev_attr_cardr.attr)
1499                 devid = ASUS_WMI_DEVID_CARDREADER;
1500         else if (attr == &dev_attr_touchpad.attr)
1501                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1502         else if (attr == &dev_attr_lid_resume.attr)
1503                 devid = ASUS_WMI_DEVID_LID_RESUME;
1504
1505         if (devid != -1)
1506                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1507
1508         return ok ? attr->mode : 0;
1509 }
1510
1511 static struct attribute_group platform_attribute_group = {
1512         .is_visible = asus_sysfs_is_visible,
1513         .attrs = platform_attributes
1514 };
1515
1516 static void asus_wmi_sysfs_exit(struct platform_device *device)
1517 {
1518         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1519 }
1520
1521 static int asus_wmi_sysfs_init(struct platform_device *device)
1522 {
1523         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1524 }
1525
1526 /*
1527  * Platform device
1528  */
1529 static int asus_wmi_platform_init(struct asus_wmi *asus)
1530 {
1531         int rv;
1532
1533         /* INIT enable hotkeys on some models */
1534         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1535                 pr_info("Initialization: %#x\n", rv);
1536
1537         /* We don't know yet what to do with this version... */
1538         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1539                 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1540                 asus->spec = rv;
1541         }
1542
1543         /*
1544          * The SFUN method probably allows the original driver to get the list
1545          * of features supported by a given model. For now, 0x0100 or 0x0800
1546          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1547          * The significance of others is yet to be found.
1548          */
1549         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1550                 pr_info("SFUN value: %#x\n", rv);
1551                 asus->sfun = rv;
1552         }
1553
1554         /*
1555          * Eee PC and Notebooks seems to have different method_id for DSTS,
1556          * but it may also be related to the BIOS's SPEC.
1557          * Note, on most Eeepc, there is no way to check if a method exist
1558          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1559          * but once again, SPEC may probably be used for that kind of things.
1560          */
1561         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1562                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1563         else
1564                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1565
1566         /* CWAP allow to define the behavior of the Fn+F2 key,
1567          * this method doesn't seems to be present on Eee PCs */
1568         if (asus->driver->quirks->wapf >= 0)
1569                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1570                                       asus->driver->quirks->wapf, NULL);
1571
1572         return asus_wmi_sysfs_init(asus->platform_device);
1573 }
1574
1575 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1576 {
1577         asus_wmi_sysfs_exit(asus->platform_device);
1578 }
1579
1580 /*
1581  * debugfs
1582  */
1583 struct asus_wmi_debugfs_node {
1584         struct asus_wmi *asus;
1585         char *name;
1586         int (*show) (struct seq_file *m, void *data);
1587 };
1588
1589 static int show_dsts(struct seq_file *m, void *data)
1590 {
1591         struct asus_wmi *asus = m->private;
1592         int err;
1593         u32 retval = -1;
1594
1595         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1596
1597         if (err < 0)
1598                 return err;
1599
1600         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1601
1602         return 0;
1603 }
1604
1605 static int show_devs(struct seq_file *m, void *data)
1606 {
1607         struct asus_wmi *asus = m->private;
1608         int err;
1609         u32 retval = -1;
1610
1611         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1612                                     &retval);
1613
1614         if (err < 0)
1615                 return err;
1616
1617         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1618                    asus->debug.ctrl_param, retval);
1619
1620         return 0;
1621 }
1622
1623 static int show_call(struct seq_file *m, void *data)
1624 {
1625         struct asus_wmi *asus = m->private;
1626         struct bios_args args = {
1627                 .arg0 = asus->debug.dev_id,
1628                 .arg1 = asus->debug.ctrl_param,
1629         };
1630         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1631         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1632         union acpi_object *obj;
1633         acpi_status status;
1634
1635         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1636                                      1, asus->debug.method_id,
1637                                      &input, &output);
1638
1639         if (ACPI_FAILURE(status))
1640                 return -EIO;
1641
1642         obj = (union acpi_object *)output.pointer;
1643         if (obj && obj->type == ACPI_TYPE_INTEGER)
1644                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1645                            asus->debug.dev_id, asus->debug.ctrl_param,
1646                            (u32) obj->integer.value);
1647         else
1648                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1649                            asus->debug.dev_id, asus->debug.ctrl_param,
1650                            obj ? obj->type : -1);
1651
1652         kfree(obj);
1653
1654         return 0;
1655 }
1656
1657 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1658         {NULL, "devs", show_devs},
1659         {NULL, "dsts", show_dsts},
1660         {NULL, "call", show_call},
1661 };
1662
1663 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1664 {
1665         struct asus_wmi_debugfs_node *node = inode->i_private;
1666
1667         return single_open(file, node->show, node->asus);
1668 }
1669
1670 static const struct file_operations asus_wmi_debugfs_io_ops = {
1671         .owner = THIS_MODULE,
1672         .open = asus_wmi_debugfs_open,
1673         .read = seq_read,
1674         .llseek = seq_lseek,
1675         .release = single_release,
1676 };
1677
1678 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1679 {
1680         debugfs_remove_recursive(asus->debug.root);
1681 }
1682
1683 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1684 {
1685         struct dentry *dent;
1686         int i;
1687
1688         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1689         if (!asus->debug.root) {
1690                 pr_err("failed to create debugfs directory\n");
1691                 goto error_debugfs;
1692         }
1693
1694         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1695                                   asus->debug.root, &asus->debug.method_id);
1696         if (!dent)
1697                 goto error_debugfs;
1698
1699         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1700                                   asus->debug.root, &asus->debug.dev_id);
1701         if (!dent)
1702                 goto error_debugfs;
1703
1704         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1705                                   asus->debug.root, &asus->debug.ctrl_param);
1706         if (!dent)
1707                 goto error_debugfs;
1708
1709         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1710                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1711
1712                 node->asus = asus;
1713                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1714                                            asus->debug.root, node,
1715                                            &asus_wmi_debugfs_io_ops);
1716                 if (!dent) {
1717                         pr_err("failed to create debug file: %s\n", node->name);
1718                         goto error_debugfs;
1719                 }
1720         }
1721
1722         return 0;
1723
1724 error_debugfs:
1725         asus_wmi_debugfs_exit(asus);
1726         return -ENOMEM;
1727 }
1728
1729 /*
1730  * WMI Driver
1731  */
1732 static int asus_wmi_add(struct platform_device *pdev)
1733 {
1734         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1735         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1736         struct asus_wmi *asus;
1737         acpi_status status;
1738         int err;
1739         u32 result;
1740
1741         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1742         if (!asus)
1743                 return -ENOMEM;
1744
1745         asus->driver = wdrv;
1746         asus->platform_device = pdev;
1747         wdrv->platform_device = pdev;
1748         platform_set_drvdata(asus->platform_device, asus);
1749
1750         if (wdrv->detect_quirks)
1751                 wdrv->detect_quirks(asus->driver);
1752
1753         err = asus_wmi_platform_init(asus);
1754         if (err)
1755                 goto fail_platform;
1756
1757         err = asus_wmi_input_init(asus);
1758         if (err)
1759                 goto fail_input;
1760
1761         err = asus_wmi_hwmon_init(asus);
1762         if (err)
1763                 goto fail_hwmon;
1764
1765         err = asus_wmi_led_init(asus);
1766         if (err)
1767                 goto fail_leds;
1768
1769         err = asus_wmi_rfkill_init(asus);
1770         if (err)
1771                 goto fail_rfkill;
1772
1773         if (asus->driver->quirks->wmi_backlight_power)
1774                 acpi_video_dmi_promote_vendor();
1775         if (!acpi_video_backlight_support()) {
1776                 pr_info("Disabling ACPI video driver\n");
1777                 acpi_video_unregister();
1778                 err = asus_wmi_backlight_init(asus);
1779                 if (err && err != -ENODEV)
1780                         goto fail_backlight;
1781         } else
1782                 pr_info("Backlight controlled by ACPI video driver\n");
1783
1784         status = wmi_install_notify_handler(asus->driver->event_guid,
1785                                             asus_wmi_notify, asus);
1786         if (ACPI_FAILURE(status)) {
1787                 pr_err("Unable to register notify handler - %d\n", status);
1788                 err = -ENODEV;
1789                 goto fail_wmi_handler;
1790         }
1791
1792         err = asus_wmi_debugfs_init(asus);
1793         if (err)
1794                 goto fail_debugfs;
1795
1796         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
1797         if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
1798                 asus->driver->wlan_ctrl_by_user = 1;
1799
1800         return 0;
1801
1802 fail_debugfs:
1803         wmi_remove_notify_handler(asus->driver->event_guid);
1804 fail_wmi_handler:
1805         asus_wmi_backlight_exit(asus);
1806 fail_backlight:
1807         asus_wmi_rfkill_exit(asus);
1808 fail_rfkill:
1809         asus_wmi_led_exit(asus);
1810 fail_leds:
1811 fail_hwmon:
1812         asus_wmi_input_exit(asus);
1813 fail_input:
1814         asus_wmi_platform_exit(asus);
1815 fail_platform:
1816         kfree(asus);
1817         return err;
1818 }
1819
1820 static int asus_wmi_remove(struct platform_device *device)
1821 {
1822         struct asus_wmi *asus;
1823
1824         asus = platform_get_drvdata(device);
1825         wmi_remove_notify_handler(asus->driver->event_guid);
1826         asus_wmi_backlight_exit(asus);
1827         asus_wmi_input_exit(asus);
1828         asus_wmi_led_exit(asus);
1829         asus_wmi_rfkill_exit(asus);
1830         asus_wmi_debugfs_exit(asus);
1831         asus_wmi_platform_exit(asus);
1832
1833         kfree(asus);
1834         return 0;
1835 }
1836
1837 /*
1838  * Platform driver - hibernate/resume callbacks
1839  */
1840 static int asus_hotk_thaw(struct device *device)
1841 {
1842         struct asus_wmi *asus = dev_get_drvdata(device);
1843
1844         if (asus->wlan.rfkill) {
1845                 bool wlan;
1846
1847                 /*
1848                  * Work around bios bug - acpi _PTS turns off the wireless led
1849                  * during suspend.  Normally it restores it on resume, but
1850                  * we should kick it ourselves in case hibernation is aborted.
1851                  */
1852                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1853                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1854         }
1855
1856         return 0;
1857 }
1858
1859 static int asus_hotk_restore(struct device *device)
1860 {
1861         struct asus_wmi *asus = dev_get_drvdata(device);
1862         int bl;
1863
1864         /* Refresh both wlan rfkill state and pci hotplug */
1865         if (asus->wlan.rfkill)
1866                 asus_rfkill_hotplug(asus);
1867
1868         if (asus->bluetooth.rfkill) {
1869                 bl = !asus_wmi_get_devstate_simple(asus,
1870                                                    ASUS_WMI_DEVID_BLUETOOTH);
1871                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1872         }
1873         if (asus->wimax.rfkill) {
1874                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1875                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1876         }
1877         if (asus->wwan3g.rfkill) {
1878                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1879                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1880         }
1881         if (asus->gps.rfkill) {
1882                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1883                 rfkill_set_sw_state(asus->gps.rfkill, bl);
1884         }
1885         if (asus->uwb.rfkill) {
1886                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1887                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1888         }
1889
1890         return 0;
1891 }
1892
1893 static const struct dev_pm_ops asus_pm_ops = {
1894         .thaw = asus_hotk_thaw,
1895         .restore = asus_hotk_restore,
1896 };
1897
1898 static int asus_wmi_probe(struct platform_device *pdev)
1899 {
1900         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1901         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1902         int ret;
1903
1904         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1905                 pr_warn("Management GUID not found\n");
1906                 return -ENODEV;
1907         }
1908
1909         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1910                 pr_warn("Event GUID not found\n");
1911                 return -ENODEV;
1912         }
1913
1914         if (wdrv->probe) {
1915                 ret = wdrv->probe(pdev);
1916                 if (ret)
1917                         return ret;
1918         }
1919
1920         return asus_wmi_add(pdev);
1921 }
1922
1923 static bool used;
1924
1925 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1926 {
1927         struct platform_driver *platform_driver;
1928         struct platform_device *platform_device;
1929
1930         if (used)
1931                 return -EBUSY;
1932
1933         platform_driver = &driver->platform_driver;
1934         platform_driver->remove = asus_wmi_remove;
1935         platform_driver->driver.owner = driver->owner;
1936         platform_driver->driver.name = driver->name;
1937         platform_driver->driver.pm = &asus_pm_ops;
1938
1939         platform_device = platform_create_bundle(platform_driver,
1940                                                  asus_wmi_probe,
1941                                                  NULL, 0, NULL, 0);
1942         if (IS_ERR(platform_device))
1943                 return PTR_ERR(platform_device);
1944
1945         used = true;
1946         return 0;
1947 }
1948 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1949
1950 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1951 {
1952         platform_device_unregister(driver->platform_device);
1953         platform_driver_unregister(&driver->platform_driver);
1954         used = false;
1955 }
1956 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1957
1958 static int __init asus_wmi_init(void)
1959 {
1960         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1961                 pr_info("Asus Management GUID not found\n");
1962                 return -ENODEV;
1963         }
1964
1965         pr_info("ASUS WMI generic driver loaded\n");
1966         return 0;
1967 }
1968
1969 static void __exit asus_wmi_exit(void)
1970 {
1971         pr_info("ASUS WMI generic driver unloaded\n");
1972 }
1973
1974 module_init(asus_wmi_init);
1975 module_exit(asus_wmi_exit);