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 <acpi/acpi_bus.h>
  49 #include <acpi/acpi_drivers.h>
  50 #include <acpi/video.h>
  51
  52 #include "asus-wmi.h"
  53
  54 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
  55               "Yong Wang <yong.y.wang@intel.com>");
  56 MODULE_DESCRIPTION("Asus Generic WMI Driver");
  57 MODULE_LICENSE("GPL");
  58
  59 #define to_platform_driver(drv)                                 \
  60         (container_of((drv), struct platform_driver, driver))
  61
  62 #define to_asus_wmi_driver(pdrv)                                        \
  63         (container_of((pdrv), struct asus_wmi_driver, platform_driver))
  64
  65 #define ASUS_WMI_MGMT_GUID      "97845ED0-4E6D-11DE-8A39-0800200C9A66"
  66
  67 #define NOTIFY_BRNUP_MIN                0x11
  68 #define NOTIFY_BRNUP_MAX                0x1f
  69 #define NOTIFY_BRNDOWN_MIN              0x20
  70 #define NOTIFY_BRNDOWN_MAX              0x2e
  71 #define NOTIFY_KBD_BRTUP                0xc4
  72 #define NOTIFY_KBD_BRTDWN               0xc5
  73
  74 /* WMI Methods */
  75 #define ASUS_WMI_METHODID_SPEC          0x43455053 /* BIOS SPECification */
  76 #define ASUS_WMI_METHODID_SFBD          0x44424653 /* Set First Boot Device */
  77 #define ASUS_WMI_METHODID_GLCD          0x44434C47 /* Get LCD status */
  78 #define ASUS_WMI_METHODID_GPID          0x44495047 /* Get Panel ID?? (Resol) */
  79 #define ASUS_WMI_METHODID_QMOD          0x444F4D51 /* Quiet MODe */
  80 #define ASUS_WMI_METHODID_SPLV          0x4C425053 /* Set Panel Light Value */
  81 #define ASUS_WMI_METHODID_SFUN          0x4E554653 /* FUNCtionalities */
  82 #define ASUS_WMI_METHODID_SDSP          0x50534453 /* Set DiSPlay output */
  83 #define ASUS_WMI_METHODID_GDSP          0x50534447 /* Get DiSPlay output */
  84 #define ASUS_WMI_METHODID_DEVP          0x50564544 /* DEVice Policy */
  85 #define ASUS_WMI_METHODID_OSVR          0x5256534F /* OS VeRsion */
  86 #define ASUS_WMI_METHODID_DSTS          0x53544344 /* Device STatuS */
  87 #define ASUS_WMI_METHODID_DSTS2         0x53545344 /* Device STatuS #2*/
  88 #define ASUS_WMI_METHODID_BSTS          0x53545342 /* Bios STatuS ? */
  89 #define ASUS_WMI_METHODID_DEVS          0x53564544 /* DEVice Set */
  90 #define ASUS_WMI_METHODID_CFVS          0x53564643 /* CPU Frequency Volt Set */
  91 #define ASUS_WMI_METHODID_KBFT          0x5446424B /* KeyBoard FilTer */
  92 #define ASUS_WMI_METHODID_INIT          0x54494E49 /* INITialize */
  93 #define ASUS_WMI_METHODID_HKEY          0x59454B48 /* Hot KEY ?? */
  94
  95 #define ASUS_WMI_UNSUPPORTED_METHOD     0xFFFFFFFE
  96
  97 /* Wireless */
  98 #define ASUS_WMI_DEVID_HW_SWITCH        0x00010001
  99 #define ASUS_WMI_DEVID_WIRELESS_LED     0x00010002
 100 #define ASUS_WMI_DEVID_CWAP             0x00010003
 101 #define ASUS_WMI_DEVID_WLAN             0x00010011
 102 #define ASUS_WMI_DEVID_WLAN_LED         0x00010012
 103 #define ASUS_WMI_DEVID_BLUETOOTH        0x00010013
 104 #define ASUS_WMI_DEVID_GPS              0x00010015
 105 #define ASUS_WMI_DEVID_WIMAX            0x00010017
 106 #define ASUS_WMI_DEVID_WWAN3G           0x00010019
 107 #define ASUS_WMI_DEVID_UWB              0x00010021
 108
 109 /* Leds */
 110 /* 0x000200XX and 0x000400XX */
 111 #define ASUS_WMI_DEVID_LED1             0x00020011
 112 #define ASUS_WMI_DEVID_LED2             0x00020012
 113 #define ASUS_WMI_DEVID_LED3             0x00020013
 114 #define ASUS_WMI_DEVID_LED4             0x00020014
 115 #define ASUS_WMI_DEVID_LED5             0x00020015
 116 #define ASUS_WMI_DEVID_LED6             0x00020016
 117
 118 /* Backlight and Brightness */
 119 #define ASUS_WMI_DEVID_BACKLIGHT        0x00050011
 120 #define ASUS_WMI_DEVID_BRIGHTNESS       0x00050012
 121 #define ASUS_WMI_DEVID_KBD_BACKLIGHT    0x00050021
 122 #define ASUS_WMI_DEVID_LIGHT_SENSOR     0x00050022 /* ?? */
 123
 124 /* Misc */
 125 #define ASUS_WMI_DEVID_CAMERA           0x00060013
 126
 127 /* Storage */
 128 #define ASUS_WMI_DEVID_CARDREADER       0x00080013
 129
 130 /* Input */
 131 #define ASUS_WMI_DEVID_TOUCHPAD         0x00100011
 132 #define ASUS_WMI_DEVID_TOUCHPAD_LED     0x00100012
 133
 134 /* Fan, Thermal */
 135 #define ASUS_WMI_DEVID_THERMAL_CTRL     0x00110011
 136 #define ASUS_WMI_DEVID_FAN_CTRL         0x00110012
 137
 138 /* Power */
 139 #define ASUS_WMI_DEVID_PROCESSOR_STATE  0x00120012
 140
 141 /* Deep S3 / Resume on LID open */
 142 #define ASUS_WMI_DEVID_LID_RESUME       0x00120031
 143
 144 /* DSTS masks */
 145 #define ASUS_WMI_DSTS_STATUS_BIT        0x00000001
 146 #define ASUS_WMI_DSTS_UNKNOWN_BIT       0x00000002
 147 #define ASUS_WMI_DSTS_PRESENCE_BIT      0x00010000
 148 #define ASUS_WMI_DSTS_USER_BIT          0x00020000
 149 #define ASUS_WMI_DSTS_BIOS_BIT          0x00040000
 150 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK   0x000000FF
 151 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK   0x0000FF00
 152
 153 struct bios_args {
 154         u32 arg0;
 155         u32 arg1;
 156 } __packed;
 157
 158 /*
 159  * <platform>/    - debugfs root directory
 160  *   dev_id      - current dev_id
 161  *   ctrl_param  - current ctrl_param
 162  *   method_id   - current method_id
 163  *   devs        - call DEVS(dev_id, ctrl_param) and print result
 164  *   dsts        - call DSTS(dev_id)  and print result
 165  *   call        - call method_id(dev_id, ctrl_param) and print result
 166  */
 167 struct asus_wmi_debug {
 168         struct dentry *root;
 169         u32 method_id;
 170         u32 dev_id;
 171         u32 ctrl_param;
 172 };
 173
 174 struct asus_rfkill {
 175         struct asus_wmi *asus;
 176         struct rfkill *rfkill;
 177         u32 dev_id;
 178 };
 179
 180 struct asus_wmi {
 181         int dsts_id;
 182         int spec;
 183         int sfun;
 184
 185         struct input_dev *inputdev;
 186         struct backlight_device *backlight_device;
 187         struct device *hwmon_device;
 188         struct platform_device *platform_device;
 189
 190         struct led_classdev wlan_led;
 191         int wlan_led_wk;
 192         struct led_classdev tpd_led;
 193         int tpd_led_wk;
 194         struct led_classdev kbd_led;
 195         int kbd_led_wk;
 196         struct workqueue_struct *led_workqueue;
 197         struct work_struct tpd_led_work;
 198         struct work_struct kbd_led_work;
 199         struct work_struct wlan_led_work;
 200
 201         struct asus_rfkill wlan;
 202         struct asus_rfkill bluetooth;
 203         struct asus_rfkill wimax;
 204         struct asus_rfkill wwan3g;
 205         struct asus_rfkill gps;
 206         struct asus_rfkill uwb;
 207
 208         struct hotplug_slot *hotplug_slot;
 209         struct mutex hotplug_lock;
 210         struct mutex wmi_lock;
 211         struct workqueue_struct *hotplug_workqueue;
 212         struct work_struct hotplug_work;
 213
 214         struct asus_wmi_debug debug;
 215
 216         struct asus_wmi_driver *driver;
 217 };
 218
 219 static int asus_wmi_input_init(struct asus_wmi *asus)
 220 {
 221         int err;
 222
 223         asus->inputdev = input_allocate_device();
 224         if (!asus->inputdev)
 225                 return -ENOMEM;
 226
 227         asus->inputdev->name = asus->driver->input_name;
 228         asus->inputdev->phys = asus->driver->input_phys;
 229         asus->inputdev->id.bustype = BUS_HOST;
 230         asus->inputdev->dev.parent = &asus->platform_device->dev;
 231         set_bit(EV_REP, asus->inputdev->evbit);
 232
 233         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
 234         if (err)
 235                 goto err_free_dev;
 236
 237         err = input_register_device(asus->inputdev);
 238         if (err)
 239                 goto err_free_keymap;
 240
 241         return 0;
 242
 243 err_free_keymap:
 244         sparse_keymap_free(asus->inputdev);
 245 err_free_dev:
 246         input_free_device(asus->inputdev);
 247         return err;
 248 }
 249
 250 static void asus_wmi_input_exit(struct asus_wmi *asus)
 251 {
 252         if (asus->inputdev) {
 253                 sparse_keymap_free(asus->inputdev);
 254                 input_unregister_device(asus->inputdev);
 255         }
 256
 257         asus->inputdev = NULL;
 258 }
 259
 260 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 261                                     u32 *retval)
 262 {
 263         struct bios_args args = {
 264                 .arg0 = arg0,
 265                 .arg1 = arg1,
 266         };
 267         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
 268         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 269         acpi_status status;
 270         union acpi_object *obj;
 271         u32 tmp;
 272
 273         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
 274                                      &input, &output);
 275
 276         if (ACPI_FAILURE(status))
 277                 goto exit;
 278
 279         obj = (union acpi_object *)output.pointer;
 280         if (obj && obj->type == ACPI_TYPE_INTEGER)
 281                 tmp = (u32) obj->integer.value;
 282         else
 283                 tmp = 0;
 284
 285         if (retval)
 286                 *retval = tmp;
 287
 288         kfree(obj);
 289
 290 exit:
 291         if (ACPI_FAILURE(status))
 292                 return -EIO;
 293
 294         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
 295                 return -ENODEV;
 296
 297         return 0;
 298 }
 299
 300 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 301 {
 302         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
 303 }
 304
 305 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 306                                  u32 *retval)
 307 {
 308         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 309                                         ctrl_param, retval);
 310 }
 311
 312 /* Helper for special devices with magic return codes */
 313 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
 314                                       u32 dev_id, u32 mask)
 315 {
 316         u32 retval = 0;
 317         int err;
 318
 319         err = asus_wmi_get_devstate(asus, dev_id, &retval);
 320
 321         if (err < 0)
 322                 return err;
 323
 324         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
 325                 return -ENODEV;
 326
 327         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
 328                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
 329                         return -ENODEV;
 330         }
 331
 332         return retval & mask;
 333 }
 334
 335 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
 336 {
 337         return asus_wmi_get_devstate_bits(asus, dev_id,
 338                                           ASUS_WMI_DSTS_STATUS_BIT);
 339 }
 340
 341 /*
 342  * LEDs
 343  */
 344 /*
 345  * These functions actually update the LED's, and are called from a
 346  * workqueue. By doing this as separate work rather than when the LED
 347  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 348  * potentially bad time, such as a timer interrupt.
 349  */
 350 static void tpd_led_update(struct work_struct *work)
 351 {
 352         int ctrl_param;
 353         struct asus_wmi *asus;
 354
 355         asus = container_of(work, struct asus_wmi, tpd_led_work);
 356
 357         ctrl_param = asus->tpd_led_wk;
 358         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
 359 }
 360
 361 static void tpd_led_set(struct led_classdev *led_cdev,
 362                         enum led_brightness value)
 363 {
 364         struct asus_wmi *asus;
 365
 366         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 367
 368         asus->tpd_led_wk = !!value;
 369         queue_work(asus->led_workqueue, &asus->tpd_led_work);
 370 }
 371
 372 static int read_tpd_led_state(struct asus_wmi *asus)
 373 {
 374         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
 375 }
 376
 377 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 378 {
 379         struct asus_wmi *asus;
 380
 381         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 382
 383         return read_tpd_led_state(asus);
 384 }
 385
 386 static void kbd_led_update(struct work_struct *work)
 387 {
 388         int ctrl_param = 0;
 389         struct asus_wmi *asus;
 390
 391         asus = container_of(work, struct asus_wmi, kbd_led_work);
 392
 393         /*
 394          * bits 0-2: level
 395          * bit 7: light on/off
 396          */
 397         if (asus->kbd_led_wk > 0)
 398                 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
 399
 400         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
 401 }
 402
 403 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 404 {
 405         int retval;
 406
 407         /*
 408          * bits 0-2: level
 409          * bit 7: light on/off
 410          * bit 8-10: environment (0: dark, 1: normal, 2: light)
 411          * bit 17: status unknown
 412          */
 413         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
 414                                             0xFFFF);
 415
 416         /* Unknown status is considered as off */
 417         if (retval == 0x8000)
 418                 retval = 0;
 419
 420         if (retval >= 0) {
 421                 if (level)
 422                         *level = retval & 0x7F;
 423                 if (env)
 424                         *env = (retval >> 8) & 0x7F;
 425                 retval = 0;
 426         }
 427
 428         return retval;
 429 }
 430
 431 static void kbd_led_set(struct led_classdev *led_cdev,
 432                         enum led_brightness value)
 433 {
 434         struct asus_wmi *asus;
 435
 436         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 437
 438         if (value > asus->kbd_led.max_brightness)
 439                 value = asus->kbd_led.max_brightness;
 440         else if (value < 0)
 441                 value = 0;
 442
 443         asus->kbd_led_wk = value;
 444         queue_work(asus->led_workqueue, &asus->kbd_led_work);
 445 }
 446
 447 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
 448 {
 449         struct asus_wmi *asus;
 450         int retval, value;
 451
 452         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 453
 454         retval = kbd_led_read(asus, &value, NULL);
 455
 456         if (retval < 0)
 457                 return retval;
 458
 459         return value;
 460 }
 461
 462 static int wlan_led_unknown_state(struct asus_wmi *asus)
 463 {
 464         u32 result;
 465
 466         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 467
 468         return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
 469 }
 470
 471 static int wlan_led_presence(struct asus_wmi *asus)
 472 {
 473         u32 result;
 474
 475         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 476
 477         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
 478 }
 479
 480 static void wlan_led_update(struct work_struct *work)
 481 {
 482         int ctrl_param;
 483         struct asus_wmi *asus;
 484
 485         asus = container_of(work, struct asus_wmi, wlan_led_work);
 486
 487         ctrl_param = asus->wlan_led_wk;
 488         asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
 489 }
 490
 491 static void wlan_led_set(struct led_classdev *led_cdev,
 492                          enum led_brightness value)
 493 {
 494         struct asus_wmi *asus;
 495
 496         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 497
 498         asus->wlan_led_wk = !!value;
 499         queue_work(asus->led_workqueue, &asus->wlan_led_work);
 500 }
 501
 502 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
 503 {
 504         struct asus_wmi *asus;
 505         u32 result;
 506
 507         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 508         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 509
 510         return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
 511 }
 512
 513 static void asus_wmi_led_exit(struct asus_wmi *asus)
 514 {
 515         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
 516                 led_classdev_unregister(&asus->kbd_led);
 517         if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
 518                 led_classdev_unregister(&asus->tpd_led);
 519         if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
 520                 led_classdev_unregister(&asus->wlan_led);
 521         if (asus->led_workqueue)
 522                 destroy_workqueue(asus->led_workqueue);
 523 }
 524
 525 static int asus_wmi_led_init(struct asus_wmi *asus)
 526 {
 527         int rv = 0;
 528
 529         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 530         if (!asus->led_workqueue)
 531                 return -ENOMEM;
 532
 533         if (read_tpd_led_state(asus) >= 0) {
 534                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 535
 536                 asus->tpd_led.name = "asus::touchpad";
 537                 asus->tpd_led.brightness_set = tpd_led_set;
 538                 asus->tpd_led.brightness_get = tpd_led_get;
 539                 asus->tpd_led.max_brightness = 1;
 540
 541                 rv = led_classdev_register(&asus->platform_device->dev,
 542                                            &asus->tpd_led);
 543                 if (rv)
 544                         goto error;
 545         }
 546
 547         if (kbd_led_read(asus, NULL, NULL) >= 0) {
 548                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
 549
 550                 asus->kbd_led.name = "asus::kbd_backlight";
 551                 asus->kbd_led.brightness_set = kbd_led_set;
 552                 asus->kbd_led.brightness_get = kbd_led_get;
 553                 asus->kbd_led.max_brightness = 3;
 554
 555                 rv = led_classdev_register(&asus->platform_device->dev,
 556                                            &asus->kbd_led);
 557                 if (rv)
 558                         goto error;
 559         }
 560
 561         if (wlan_led_presence(asus) && (asus->driver->quirks->wapf == 4)) {
 562                 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
 563
 564                 asus->wlan_led.name = "asus::wlan";
 565                 asus->wlan_led.brightness_set = wlan_led_set;
 566                 if (!wlan_led_unknown_state(asus))
 567                         asus->wlan_led.brightness_get = wlan_led_get;
 568                 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
 569                 asus->wlan_led.max_brightness = 1;
 570                 asus->wlan_led.default_trigger = "asus-wlan";
 571
 572                 rv = led_classdev_register(&asus->platform_device->dev,
 573                                            &asus->wlan_led);
 574         }
 575
 576 error:
 577         if (rv)
 578                 asus_wmi_led_exit(asus);
 579
 580         return rv;
 581 }
 582
 583
 584 /*
 585  * PCI hotplug (for wlan rfkill)
 586  */
 587 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 588 {
 589         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 590
 591         if (result < 0)
 592                 return false;
 593         return !result;
 594 }
 595
 596 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 597 {
 598         struct pci_dev *dev;
 599         struct pci_bus *bus;
 600         bool blocked;
 601         bool absent;
 602         u32 l;
 603
 604         mutex_lock(&asus->wmi_lock);
 605         blocked = asus_wlan_rfkill_blocked(asus);
 606         mutex_unlock(&asus->wmi_lock);
 607
 608         mutex_lock(&asus->hotplug_lock);
 609
 610         if (asus->wlan.rfkill)
 611                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 612
 613         if (asus->hotplug_slot) {
 614                 bus = pci_find_bus(0, 1);
 615                 if (!bus) {
 616                         pr_warn("Unable to find PCI bus 1?\n");
 617                         goto out_unlock;
 618                 }
 619
 620                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 621                         pr_err("Unable to read PCI config space?\n");
 622                         goto out_unlock;
 623                 }
 624                 absent = (l == 0xffffffff);
 625
 626                 if (blocked != absent) {
 627                         pr_warn("BIOS says wireless lan is %s, "
 628                                 "but the pci device is %s\n",
 629                                 blocked ? "blocked" : "unblocked",
 630                                 absent ? "absent" : "present");
 631                         pr_warn("skipped wireless hotplug as probably "
 632                                 "inappropriate for this model\n");
 633                         goto out_unlock;
 634                 }
 635
 636                 if (!blocked) {
 637                         dev = pci_get_slot(bus, 0);
 638                         if (dev) {
 639                                 /* Device already present */
 640                                 pci_dev_put(dev);
 641                                 goto out_unlock;
 642                         }
 643                         dev = pci_scan_single_device(bus, 0);
 644                         if (dev) {
 645                                 pci_bus_assign_resources(bus);
 646                                 if (pci_bus_add_device(dev))
 647                                         pr_err("Unable to hotplug wifi\n");
 648                         }
 649                 } else {
 650                         dev = pci_get_slot(bus, 0);
 651                         if (dev) {
 652                                 pci_stop_and_remove_bus_device(dev);
 653                                 pci_dev_put(dev);
 654                         }
 655                 }
 656         }
 657
 658 out_unlock:
 659         mutex_unlock(&asus->hotplug_lock);
 660 }
 661
 662 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
 663 {
 664         struct asus_wmi *asus = data;
 665
 666         if (event != ACPI_NOTIFY_BUS_CHECK)
 667                 return;
 668
 669         /*
 670          * We can't call directly asus_rfkill_hotplug because most
 671          * of the time WMBC is still being executed and not reetrant.
 672          * There is currently no way to tell ACPICA that  we want this
 673          * method to be serialized, we schedule a asus_rfkill_hotplug
 674          * call later, in a safer context.
 675          */
 676         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
 677 }
 678
 679 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 680 {
 681         acpi_status status;
 682         acpi_handle handle;
 683
 684         status = acpi_get_handle(NULL, node, &handle);
 685
 686         if (ACPI_SUCCESS(status)) {
 687                 status = acpi_install_notify_handler(handle,
 688                                                      ACPI_SYSTEM_NOTIFY,
 689                                                      asus_rfkill_notify, asus);
 690                 if (ACPI_FAILURE(status))
 691                         pr_warn("Failed to register notify on %s\n", node);
 692         } else
 693                 return -ENODEV;
 694
 695         return 0;
 696 }
 697
 698 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 699 {
 700         acpi_status status = AE_OK;
 701         acpi_handle handle;
 702
 703         status = acpi_get_handle(NULL, node, &handle);
 704
 705         if (ACPI_SUCCESS(status)) {
 706                 status = acpi_remove_notify_handler(handle,
 707                                                     ACPI_SYSTEM_NOTIFY,
 708                                                     asus_rfkill_notify);
 709                 if (ACPI_FAILURE(status))
 710                         pr_err("Error removing rfkill notify handler %s\n",
 711                                node);
 712         }
 713 }
 714
 715 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
 716                                    u8 *value)
 717 {
 718         struct asus_wmi *asus = hotplug_slot->private;
 719         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 720
 721         if (result < 0)
 722                 return result;
 723
 724         *value = !!result;
 725         return 0;
 726 }
 727
 728 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 729 {
 730         kfree(hotplug_slot->info);
 731         kfree(hotplug_slot);
 732 }
 733
 734 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
 735         .owner = THIS_MODULE,
 736         .get_adapter_status = asus_get_adapter_status,
 737         .get_power_status = asus_get_adapter_status,
 738 };
 739
 740 static void asus_hotplug_work(struct work_struct *work)
 741 {
 742         struct asus_wmi *asus;
 743
 744         asus = container_of(work, struct asus_wmi, hotplug_work);
 745         asus_rfkill_hotplug(asus);
 746 }
 747
 748 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
 749 {
 750         int ret = -ENOMEM;
 751         struct pci_bus *bus = pci_find_bus(0, 1);
 752
 753         if (!bus) {
 754                 pr_err("Unable to find wifi PCI bus\n");
 755                 return -ENODEV;
 756         }
 757
 758         asus->hotplug_workqueue =
 759             create_singlethread_workqueue("hotplug_workqueue");
 760         if (!asus->hotplug_workqueue)
 761                 goto error_workqueue;
 762
 763         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
 764
 765         asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 766         if (!asus->hotplug_slot)
 767                 goto error_slot;
 768
 769         asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 770                                            GFP_KERNEL);
 771         if (!asus->hotplug_slot->info)
 772                 goto error_info;
 773
 774         asus->hotplug_slot->private = asus;
 775         asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
 776         asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
 777         asus_get_adapter_status(asus->hotplug_slot,
 778                                 &asus->hotplug_slot->info->adapter_status);
 779
 780         ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
 781         if (ret) {
 782                 pr_err("Unable to register hotplug slot - %d\n", ret);
 783                 goto error_register;
 784         }
 785
 786         return 0;
 787
 788 error_register:
 789         kfree(asus->hotplug_slot->info);
 790 error_info:
 791         kfree(asus->hotplug_slot);
 792         asus->hotplug_slot = NULL;
 793 error_slot:
 794         destroy_workqueue(asus->hotplug_workqueue);
 795 error_workqueue:
 796         return ret;
 797 }
 798
 799 /*
 800  * Rfkill devices
 801  */
 802 static int asus_rfkill_set(void *data, bool blocked)
 803 {
 804         struct asus_rfkill *priv = data;
 805         u32 ctrl_param = !blocked;
 806         u32 dev_id = priv->dev_id;
 807
 808         /*
 809          * If the user bit is set, BIOS can't set and record the wlan status,
 810          * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
 811          * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
 812          * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
 813          * while setting the wlan status through WMI.
 814          * This is also the behavior that windows app will do.
 815          */
 816         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 817              priv->asus->driver->wlan_ctrl_by_user)
 818                 dev_id = ASUS_WMI_DEVID_WLAN_LED;
 819
 820         return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
 821 }
 822
 823 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
 824 {
 825         struct asus_rfkill *priv = data;
 826         int result;
 827
 828         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
 829
 830         if (result < 0)
 831                 return;
 832
 833         rfkill_set_sw_state(priv->rfkill, !result);
 834 }
 835
 836 static int asus_rfkill_wlan_set(void *data, bool blocked)
 837 {
 838         struct asus_rfkill *priv = data;
 839         struct asus_wmi *asus = priv->asus;
 840         int ret;
 841
 842         /*
 843          * This handler is enabled only if hotplug is enabled.
 844          * In this case, the asus_wmi_set_devstate() will
 845          * trigger a wmi notification and we need to wait
 846          * this call to finish before being able to call
 847          * any wmi method
 848          */
 849         mutex_lock(&asus->wmi_lock);
 850         ret = asus_rfkill_set(data, blocked);
 851         mutex_unlock(&asus->wmi_lock);
 852         return ret;
 853 }
 854
 855 static const struct rfkill_ops asus_rfkill_wlan_ops = {
 856         .set_block = asus_rfkill_wlan_set,
 857         .query = asus_rfkill_query,
 858 };
 859
 860 static const struct rfkill_ops asus_rfkill_ops = {
 861         .set_block = asus_rfkill_set,
 862         .query = asus_rfkill_query,
 863 };
 864
 865 static int asus_new_rfkill(struct asus_wmi *asus,
 866                            struct asus_rfkill *arfkill,
 867                            const char *name, enum rfkill_type type, int dev_id)
 868 {
 869         int result = asus_wmi_get_devstate_simple(asus, dev_id);
 870         struct rfkill **rfkill = &arfkill->rfkill;
 871
 872         if (result < 0)
 873                 return result;
 874
 875         arfkill->dev_id = dev_id;
 876         arfkill->asus = asus;
 877
 878         if (dev_id == ASUS_WMI_DEVID_WLAN &&
 879             asus->driver->quirks->hotplug_wireless)
 880                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 881                                        &asus_rfkill_wlan_ops, arfkill);
 882         else
 883                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 884                                        &asus_rfkill_ops, arfkill);
 885
 886         if (!*rfkill)
 887                 return -EINVAL;
 888
 889         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 890                         (asus->driver->quirks->wapf == 4))
 891                 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
 892
 893         rfkill_init_sw_state(*rfkill, !result);
 894         result = rfkill_register(*rfkill);
 895         if (result) {
 896                 rfkill_destroy(*rfkill);
 897                 *rfkill = NULL;
 898                 return result;
 899         }
 900         return 0;
 901 }
 902
 903 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
 904 {
 905         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 906         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 907         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 908         if (asus->wlan.rfkill) {
 909                 rfkill_unregister(asus->wlan.rfkill);
 910                 rfkill_destroy(asus->wlan.rfkill);
 911                 asus->wlan.rfkill = NULL;
 912         }
 913         /*
 914          * Refresh pci hotplug in case the rfkill state was changed after
 915          * asus_unregister_rfkill_notifier()
 916          */
 917         asus_rfkill_hotplug(asus);
 918         if (asus->hotplug_slot)
 919                 pci_hp_deregister(asus->hotplug_slot);
 920         if (asus->hotplug_workqueue)
 921                 destroy_workqueue(asus->hotplug_workqueue);
 922
 923         if (asus->bluetooth.rfkill) {
 924                 rfkill_unregister(asus->bluetooth.rfkill);
 925                 rfkill_destroy(asus->bluetooth.rfkill);
 926                 asus->bluetooth.rfkill = NULL;
 927         }
 928         if (asus->wimax.rfkill) {
 929                 rfkill_unregister(asus->wimax.rfkill);
 930                 rfkill_destroy(asus->wimax.rfkill);
 931                 asus->wimax.rfkill = NULL;
 932         }
 933         if (asus->wwan3g.rfkill) {
 934                 rfkill_unregister(asus->wwan3g.rfkill);
 935                 rfkill_destroy(asus->wwan3g.rfkill);
 936                 asus->wwan3g.rfkill = NULL;
 937         }
 938         if (asus->gps.rfkill) {
 939                 rfkill_unregister(asus->gps.rfkill);
 940                 rfkill_destroy(asus->gps.rfkill);
 941                 asus->gps.rfkill = NULL;
 942         }
 943         if (asus->uwb.rfkill) {
 944                 rfkill_unregister(asus->uwb.rfkill);
 945                 rfkill_destroy(asus->uwb.rfkill);
 946                 asus->uwb.rfkill = NULL;
 947         }
 948 }
 949
 950 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
 951 {
 952         int result = 0;
 953
 954         mutex_init(&asus->hotplug_lock);
 955         mutex_init(&asus->wmi_lock);
 956
 957         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
 958                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
 959
 960         if (result && result != -ENODEV)
 961                 goto exit;
 962
 963         result = asus_new_rfkill(asus, &asus->bluetooth,
 964                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
 965                                  ASUS_WMI_DEVID_BLUETOOTH);
 966
 967         if (result && result != -ENODEV)
 968                 goto exit;
 969
 970         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
 971                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
 972
 973         if (result && result != -ENODEV)
 974                 goto exit;
 975
 976         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
 977                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
 978
 979         if (result && result != -ENODEV)
 980                 goto exit;
 981
 982         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
 983                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
 984
 985         if (result && result != -ENODEV)
 986                 goto exit;
 987
 988         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
 989                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
 990
 991         if (result && result != -ENODEV)
 992                 goto exit;
 993
 994         if (!asus->driver->quirks->hotplug_wireless)
 995                 goto exit;
 996
 997         result = asus_setup_pci_hotplug(asus);
 998         /*
 999          * If we get -EBUSY then something else is handling the PCI hotplug -
1000          * don't fail in this case
1001          */
1002         if (result == -EBUSY)
1003                 result = 0;
1004
1005         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1006         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1007         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1008         /*
1009          * Refresh pci hotplug in case the rfkill state was changed during
1010          * setup.
1011          */
1012         asus_rfkill_hotplug(asus);
1013
1014 exit:
1015         if (result && result != -ENODEV)
1016                 asus_wmi_rfkill_exit(asus);
1017
1018         if (result == -ENODEV)
1019                 result = 0;
1020
1021         return result;
1022 }
1023
1024 /*
1025  * Hwmon device
1026  */
1027 static ssize_t asus_hwmon_pwm1(struct device *dev,
1028                                struct device_attribute *attr,
1029                                char *buf)
1030 {
1031         struct asus_wmi *asus = dev_get_drvdata(dev);
1032         u32 value;
1033         int err;
1034
1035         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
1036
1037         if (err < 0)
1038                 return err;
1039
1040         value &= 0xFF;
1041
1042         if (value == 1) /* Low Speed */
1043                 value = 85;
1044         else if (value == 2)
1045                 value = 170;
1046         else if (value == 3)
1047                 value = 255;
1048         else if (value != 0) {
1049                 pr_err("Unknown fan speed %#x\n", value);
1050                 value = -1;
1051         }
1052
1053         return sprintf(buf, "%d\n", value);
1054 }
1055
1056 static ssize_t asus_hwmon_temp1(struct device *dev,
1057                                 struct device_attribute *attr,
1058                                 char *buf)
1059 {
1060         struct asus_wmi *asus = dev_get_drvdata(dev);
1061         u32 value;
1062         int err;
1063
1064         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1065
1066         if (err < 0)
1067                 return err;
1068
1069         value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1070
1071         return sprintf(buf, "%d\n", value);
1072 }
1073
1074 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
1075 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL, 0);
1076
1077 static ssize_t
1078 show_name(struct device *dev, struct device_attribute *attr, char *buf)
1079 {
1080         return sprintf(buf, "asus\n");
1081 }
1082 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
1083
1084 static struct attribute *hwmon_attributes[] = {
1085         &sensor_dev_attr_pwm1.dev_attr.attr,
1086         &sensor_dev_attr_temp1_input.dev_attr.attr,
1087         &sensor_dev_attr_name.dev_attr.attr,
1088         NULL
1089 };
1090
1091 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1092                                           struct attribute *attr, int idx)
1093 {
1094         struct device *dev = container_of(kobj, struct device, kobj);
1095         struct platform_device *pdev = to_platform_device(dev->parent);
1096         struct asus_wmi *asus = platform_get_drvdata(pdev);
1097         bool ok = true;
1098         int dev_id = -1;
1099         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1100
1101         if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
1102                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1103         else if (attr == &sensor_dev_attr_temp1_input.dev_attr.attr)
1104                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1105
1106         if (dev_id != -1) {
1107                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1108
1109                 if (err < 0)
1110                         return 0; /* can't return negative here */
1111         }
1112
1113         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1114                 /*
1115                  * We need to find a better way, probably using sfun,
1116                  * bits or spec ...
1117                  * Currently we disable it if:
1118                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1119                  * - reverved bits are non-zero
1120                  * - sfun and presence bit are not set
1121                  */
1122                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1123                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1124                         ok = false;
1125         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1126                 /* If value is zero, something is clearly wrong */
1127                 if (value == 0)
1128                         ok = false;
1129         }
1130
1131         return ok ? attr->mode : 0;
1132 }
1133
1134 static struct attribute_group hwmon_attribute_group = {
1135         .is_visible = asus_hwmon_sysfs_is_visible,
1136         .attrs = hwmon_attributes
1137 };
1138
1139 static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
1140 {
1141         struct device *hwmon;
1142
1143         hwmon = asus->hwmon_device;
1144         if (!hwmon)
1145                 return;
1146         sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
1147         hwmon_device_unregister(hwmon);
1148         asus->hwmon_device = NULL;
1149 }
1150
1151 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1152 {
1153         struct device *hwmon;
1154         int result;
1155
1156         hwmon = hwmon_device_register(&asus->platform_device->dev);
1157         if (IS_ERR(hwmon)) {
1158                 pr_err("Could not register asus hwmon device\n");
1159                 return PTR_ERR(hwmon);
1160         }
1161         dev_set_drvdata(hwmon, asus);
1162         asus->hwmon_device = hwmon;
1163         result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
1164         if (result)
1165                 asus_wmi_hwmon_exit(asus);
1166         return result;
1167 }
1168
1169 /*
1170  * Backlight
1171  */
1172 static int read_backlight_power(struct asus_wmi *asus)
1173 {
1174         int ret;
1175         if (asus->driver->quirks->store_backlight_power)
1176                 ret = !asus->driver->panel_power;
1177         else
1178                 ret = asus_wmi_get_devstate_simple(asus,
1179                                                    ASUS_WMI_DEVID_BACKLIGHT);
1180
1181         if (ret < 0)
1182                 return ret;
1183
1184         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1185 }
1186
1187 static int read_brightness_max(struct asus_wmi *asus)
1188 {
1189         u32 retval;
1190         int err;
1191
1192         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1193
1194         if (err < 0)
1195                 return err;
1196
1197         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1198         retval >>= 8;
1199
1200         if (!retval)
1201                 return -ENODEV;
1202
1203         return retval;
1204 }
1205
1206 static int read_brightness(struct backlight_device *bd)
1207 {
1208         struct asus_wmi *asus = bl_get_data(bd);
1209         u32 retval;
1210         int err;
1211
1212         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1213
1214         if (err < 0)
1215                 return err;
1216
1217         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1218 }
1219
1220 static u32 get_scalar_command(struct backlight_device *bd)
1221 {
1222         struct asus_wmi *asus = bl_get_data(bd);
1223         u32 ctrl_param = 0;
1224
1225         if ((asus->driver->brightness < bd->props.brightness) ||
1226             bd->props.brightness == bd->props.max_brightness)
1227                 ctrl_param = 0x00008001;
1228         else if ((asus->driver->brightness > bd->props.brightness) ||
1229                  bd->props.brightness == 0)
1230                 ctrl_param = 0x00008000;
1231
1232         asus->driver->brightness = bd->props.brightness;
1233
1234         return ctrl_param;
1235 }
1236
1237 static int update_bl_status(struct backlight_device *bd)
1238 {
1239         struct asus_wmi *asus = bl_get_data(bd);
1240         u32 ctrl_param;
1241         int power, err = 0;
1242
1243         power = read_backlight_power(asus);
1244         if (power != -ENODEV && bd->props.power != power) {
1245                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1246                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1247                                             ctrl_param, NULL);
1248                 if (asus->driver->quirks->store_backlight_power)
1249                         asus->driver->panel_power = bd->props.power;
1250
1251                 /* When using scalar brightness, updating the brightness
1252                  * will mess with the backlight power */
1253                 if (asus->driver->quirks->scalar_panel_brightness)
1254                         return err;
1255         }
1256
1257         if (asus->driver->quirks->scalar_panel_brightness)
1258                 ctrl_param = get_scalar_command(bd);
1259         else
1260                 ctrl_param = bd->props.brightness;
1261
1262         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1263                                     ctrl_param, NULL);
1264
1265         return err;
1266 }
1267
1268 static const struct backlight_ops asus_wmi_bl_ops = {
1269         .get_brightness = read_brightness,
1270         .update_status = update_bl_status,
1271 };
1272
1273 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1274 {
1275         struct backlight_device *bd = asus->backlight_device;
1276         int old = bd->props.brightness;
1277         int new = old;
1278
1279         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1280                 new = code - NOTIFY_BRNUP_MIN + 1;
1281         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1282                 new = code - NOTIFY_BRNDOWN_MIN;
1283
1284         bd->props.brightness = new;
1285         backlight_update_status(bd);
1286         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1287
1288         return old;
1289 }
1290
1291 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1292 {
1293         struct backlight_device *bd;
1294         struct backlight_properties props;
1295         int max;
1296         int power;
1297
1298         max = read_brightness_max(asus);
1299
1300         if (max == -ENODEV)
1301                 max = 0;
1302         else if (max < 0)
1303                 return max;
1304
1305         power = read_backlight_power(asus);
1306
1307         if (power == -ENODEV)
1308                 power = FB_BLANK_UNBLANK;
1309         else if (power < 0)
1310                 return power;
1311
1312         memset(&props, 0, sizeof(struct backlight_properties));
1313         props.type = BACKLIGHT_PLATFORM;
1314         props.max_brightness = max;
1315         bd = backlight_device_register(asus->driver->name,
1316                                        &asus->platform_device->dev, asus,
1317                                        &asus_wmi_bl_ops, &props);
1318         if (IS_ERR(bd)) {
1319                 pr_err("Could not register backlight device\n");
1320                 return PTR_ERR(bd);
1321         }
1322
1323         asus->backlight_device = bd;
1324
1325         if (asus->driver->quirks->store_backlight_power)
1326                 asus->driver->panel_power = power;
1327
1328         bd->props.brightness = read_brightness(bd);
1329         bd->props.power = power;
1330         backlight_update_status(bd);
1331
1332         asus->driver->brightness = bd->props.brightness;
1333
1334         return 0;
1335 }
1336
1337 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1338 {
1339         if (asus->backlight_device)
1340                 backlight_device_unregister(asus->backlight_device);
1341
1342         asus->backlight_device = NULL;
1343 }
1344
1345 static int is_display_toggle(int code)
1346 {
1347         /* display toggle keys */
1348         if ((code >= 0x61 && code <= 0x67) ||
1349             (code >= 0x8c && code <= 0x93) ||
1350             (code >= 0xa0 && code <= 0xa7) ||
1351             (code >= 0xd0 && code <= 0xd5))
1352                 return 1;
1353
1354         return 0;
1355 }
1356
1357 static void asus_wmi_notify(u32 value, void *context)
1358 {
1359         struct asus_wmi *asus = context;
1360         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1361         union acpi_object *obj;
1362         acpi_status status;
1363         int code;
1364         int orig_code;
1365         unsigned int key_value = 1;
1366         bool autorelease = 1;
1367
1368         status = wmi_get_event_data(value, &response);
1369         if (status != AE_OK) {
1370                 pr_err("bad event status 0x%x\n", status);
1371                 return;
1372         }
1373
1374         obj = (union acpi_object *)response.pointer;
1375
1376         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1377                 goto exit;
1378
1379         code = obj->integer.value;
1380         orig_code = code;
1381
1382         if (asus->driver->key_filter) {
1383                 asus->driver->key_filter(asus->driver, &code, &key_value,
1384                                          &autorelease);
1385                 if (code == ASUS_WMI_KEY_IGNORE)
1386                         goto exit;
1387         }
1388
1389         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1390                 code = ASUS_WMI_BRN_UP;
1391         else if (code >= NOTIFY_BRNDOWN_MIN &&
1392                  code <= NOTIFY_BRNDOWN_MAX)
1393                 code = ASUS_WMI_BRN_DOWN;
1394
1395         if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1396                 if (!acpi_video_backlight_support()) {
1397                         asus_wmi_backlight_notify(asus, orig_code);
1398                         goto exit;
1399                 }
1400         }
1401
1402         if (is_display_toggle(code) &&
1403             asus->driver->quirks->no_display_toggle)
1404                 goto exit;
1405
1406         if (!sparse_keymap_report_event(asus->inputdev, code,
1407                                         key_value, autorelease))
1408                 pr_info("Unknown key %x pressed\n", code);
1409
1410 exit:
1411         kfree(obj);
1412 }
1413
1414 /*
1415  * Sys helpers
1416  */
1417 static int parse_arg(const char *buf, unsigned long count, int *val)
1418 {
1419         if (!count)
1420                 return 0;
1421         if (sscanf(buf, "%i", val) != 1)
1422                 return -EINVAL;
1423         return count;
1424 }
1425
1426 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1427                              const char *buf, size_t count)
1428 {
1429         u32 retval;
1430         int rv, err, value;
1431
1432         value = asus_wmi_get_devstate_simple(asus, devid);
1433         if (value == -ENODEV)   /* Check device presence */
1434                 return value;
1435
1436         rv = parse_arg(buf, count, &value);
1437         err = asus_wmi_set_devstate(devid, value, &retval);
1438
1439         if (err < 0)
1440                 return err;
1441
1442         return rv;
1443 }
1444
1445 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1446 {
1447         int value = asus_wmi_get_devstate_simple(asus, devid);
1448
1449         if (value < 0)
1450                 return value;
1451
1452         return sprintf(buf, "%d\n", value);
1453 }
1454
1455 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1456         static ssize_t show_##_name(struct device *dev,                 \
1457                                     struct device_attribute *attr,      \
1458                                     char *buf)                          \
1459         {                                                               \
1460                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1461                                                                         \
1462                 return show_sys_wmi(asus, _cm, buf);                    \
1463         }                                                               \
1464         static ssize_t store_##_name(struct device *dev,                \
1465                                      struct device_attribute *attr,     \
1466                                      const char *buf, size_t count)     \
1467         {                                                               \
1468                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1469                                                                         \
1470                 return store_sys_wmi(asus, _cm, buf, count);            \
1471         }                                                               \
1472         static struct device_attribute dev_attr_##_name = {             \
1473                 .attr = {                                               \
1474                         .name = __stringify(_name),                     \
1475                         .mode = _mode },                                \
1476                 .show   = show_##_name,                                 \
1477                 .store  = store_##_name,                                \
1478         }
1479
1480 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1481 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1482 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1483 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1484
1485 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1486                            const char *buf, size_t count)
1487 {
1488         int value, rv;
1489
1490         if (!count || sscanf(buf, "%i", &value) != 1)
1491                 return -EINVAL;
1492         if (value < 0 || value > 2)
1493                 return -EINVAL;
1494
1495         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1496         if (rv < 0)
1497                 return rv;
1498
1499         return count;
1500 }
1501
1502 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1503
1504 static struct attribute *platform_attributes[] = {
1505         &dev_attr_cpufv.attr,
1506         &dev_attr_camera.attr,
1507         &dev_attr_cardr.attr,
1508         &dev_attr_touchpad.attr,
1509         &dev_attr_lid_resume.attr,
1510         NULL
1511 };
1512
1513 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1514                                     struct attribute *attr, int idx)
1515 {
1516         struct device *dev = container_of(kobj, struct device, kobj);
1517         struct platform_device *pdev = to_platform_device(dev);
1518         struct asus_wmi *asus = platform_get_drvdata(pdev);
1519         bool ok = true;
1520         int devid = -1;
1521
1522         if (attr == &dev_attr_camera.attr)
1523                 devid = ASUS_WMI_DEVID_CAMERA;
1524         else if (attr == &dev_attr_cardr.attr)
1525                 devid = ASUS_WMI_DEVID_CARDREADER;
1526         else if (attr == &dev_attr_touchpad.attr)
1527                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1528         else if (attr == &dev_attr_lid_resume.attr)
1529                 devid = ASUS_WMI_DEVID_LID_RESUME;
1530
1531         if (devid != -1)
1532                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1533
1534         return ok ? attr->mode : 0;
1535 }
1536
1537 static struct attribute_group platform_attribute_group = {
1538         .is_visible = asus_sysfs_is_visible,
1539         .attrs = platform_attributes
1540 };
1541
1542 static void asus_wmi_sysfs_exit(struct platform_device *device)
1543 {
1544         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1545 }
1546
1547 static int asus_wmi_sysfs_init(struct platform_device *device)
1548 {
1549         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1550 }
1551
1552 /*
1553  * Platform device
1554  */
1555 static int asus_wmi_platform_init(struct asus_wmi *asus)
1556 {
1557         int rv;
1558
1559         /* INIT enable hotkeys on some models */
1560         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1561                 pr_info("Initialization: %#x\n", rv);
1562
1563         /* We don't know yet what to do with this version... */
1564         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1565                 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1566                 asus->spec = rv;
1567         }
1568
1569         /*
1570          * The SFUN method probably allows the original driver to get the list
1571          * of features supported by a given model. For now, 0x0100 or 0x0800
1572          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1573          * The significance of others is yet to be found.
1574          */
1575         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1576                 pr_info("SFUN value: %#x\n", rv);
1577                 asus->sfun = rv;
1578         }
1579
1580         /*
1581          * Eee PC and Notebooks seems to have different method_id for DSTS,
1582          * but it may also be related to the BIOS's SPEC.
1583          * Note, on most Eeepc, there is no way to check if a method exist
1584          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1585          * but once again, SPEC may probably be used for that kind of things.
1586          */
1587         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1588                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1589         else
1590                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1591
1592         /* CWAP allow to define the behavior of the Fn+F2 key,
1593          * this method doesn't seems to be present on Eee PCs */
1594         if (asus->driver->quirks->wapf >= 0)
1595                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1596                                       asus->driver->quirks->wapf, NULL);
1597
1598         return asus_wmi_sysfs_init(asus->platform_device);
1599 }
1600
1601 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1602 {
1603         asus_wmi_sysfs_exit(asus->platform_device);
1604 }
1605
1606 /*
1607  * debugfs
1608  */
1609 struct asus_wmi_debugfs_node {
1610         struct asus_wmi *asus;
1611         char *name;
1612         int (*show) (struct seq_file *m, void *data);
1613 };
1614
1615 static int show_dsts(struct seq_file *m, void *data)
1616 {
1617         struct asus_wmi *asus = m->private;
1618         int err;
1619         u32 retval = -1;
1620
1621         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1622
1623         if (err < 0)
1624                 return err;
1625
1626         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1627
1628         return 0;
1629 }
1630
1631 static int show_devs(struct seq_file *m, void *data)
1632 {
1633         struct asus_wmi *asus = m->private;
1634         int err;
1635         u32 retval = -1;
1636
1637         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1638                                     &retval);
1639
1640         if (err < 0)
1641                 return err;
1642
1643         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1644                    asus->debug.ctrl_param, retval);
1645
1646         return 0;
1647 }
1648
1649 static int show_call(struct seq_file *m, void *data)
1650 {
1651         struct asus_wmi *asus = m->private;
1652         struct bios_args args = {
1653                 .arg0 = asus->debug.dev_id,
1654                 .arg1 = asus->debug.ctrl_param,
1655         };
1656         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1657         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1658         union acpi_object *obj;
1659         acpi_status status;
1660
1661         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1662                                      1, asus->debug.method_id,
1663                                      &input, &output);
1664
1665         if (ACPI_FAILURE(status))
1666                 return -EIO;
1667
1668         obj = (union acpi_object *)output.pointer;
1669         if (obj && obj->type == ACPI_TYPE_INTEGER)
1670                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1671                            asus->debug.dev_id, asus->debug.ctrl_param,
1672                            (u32) obj->integer.value);
1673         else
1674                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1675                            asus->debug.dev_id, asus->debug.ctrl_param,
1676                            obj ? obj->type : -1);
1677
1678         kfree(obj);
1679
1680         return 0;
1681 }
1682
1683 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1684         {NULL, "devs", show_devs},
1685         {NULL, "dsts", show_dsts},
1686         {NULL, "call", show_call},
1687 };
1688
1689 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1690 {
1691         struct asus_wmi_debugfs_node *node = inode->i_private;
1692
1693         return single_open(file, node->show, node->asus);
1694 }
1695
1696 static const struct file_operations asus_wmi_debugfs_io_ops = {
1697         .owner = THIS_MODULE,
1698         .open = asus_wmi_debugfs_open,
1699         .read = seq_read,
1700         .llseek = seq_lseek,
1701         .release = single_release,
1702 };
1703
1704 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1705 {
1706         debugfs_remove_recursive(asus->debug.root);
1707 }
1708
1709 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1710 {
1711         struct dentry *dent;
1712         int i;
1713
1714         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1715         if (!asus->debug.root) {
1716                 pr_err("failed to create debugfs directory\n");
1717                 goto error_debugfs;
1718         }
1719
1720         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1721                                   asus->debug.root, &asus->debug.method_id);
1722         if (!dent)
1723                 goto error_debugfs;
1724
1725         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1726                                   asus->debug.root, &asus->debug.dev_id);
1727         if (!dent)
1728                 goto error_debugfs;
1729
1730         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1731                                   asus->debug.root, &asus->debug.ctrl_param);
1732         if (!dent)
1733                 goto error_debugfs;
1734
1735         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1736                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1737
1738                 node->asus = asus;
1739                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1740                                            asus->debug.root, node,
1741                                            &asus_wmi_debugfs_io_ops);
1742                 if (!dent) {
1743                         pr_err("failed to create debug file: %s\n", node->name);
1744                         goto error_debugfs;
1745                 }
1746         }
1747
1748         return 0;
1749
1750 error_debugfs:
1751         asus_wmi_debugfs_exit(asus);
1752         return -ENOMEM;
1753 }
1754
1755 /*
1756  * WMI Driver
1757  */
1758 static int asus_wmi_add(struct platform_device *pdev)
1759 {
1760         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1761         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1762         struct asus_wmi *asus;
1763         acpi_status status;
1764         int err;
1765         u32 result;
1766
1767         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1768         if (!asus)
1769                 return -ENOMEM;
1770
1771         asus->driver = wdrv;
1772         asus->platform_device = pdev;
1773         wdrv->platform_device = pdev;
1774         platform_set_drvdata(asus->platform_device, asus);
1775
1776         if (wdrv->detect_quirks)
1777                 wdrv->detect_quirks(asus->driver);
1778
1779         err = asus_wmi_platform_init(asus);
1780         if (err)
1781                 goto fail_platform;
1782
1783         err = asus_wmi_input_init(asus);
1784         if (err)
1785                 goto fail_input;
1786
1787         err = asus_wmi_hwmon_init(asus);
1788         if (err)
1789                 goto fail_hwmon;
1790
1791         err = asus_wmi_led_init(asus);
1792         if (err)
1793                 goto fail_leds;
1794
1795         err = asus_wmi_rfkill_init(asus);
1796         if (err)
1797                 goto fail_rfkill;
1798
1799         if (asus->driver->quirks->wmi_backlight_power)
1800                 acpi_video_dmi_promote_vendor();
1801         if (!acpi_video_backlight_support()) {
1802                 pr_info("Disabling ACPI video driver\n");
1803                 acpi_video_unregister();
1804                 err = asus_wmi_backlight_init(asus);
1805                 if (err && err != -ENODEV)
1806                         goto fail_backlight;
1807         } else
1808                 pr_info("Backlight controlled by ACPI video driver\n");
1809
1810         status = wmi_install_notify_handler(asus->driver->event_guid,
1811                                             asus_wmi_notify, asus);
1812         if (ACPI_FAILURE(status)) {
1813                 pr_err("Unable to register notify handler - %d\n", status);
1814                 err = -ENODEV;
1815                 goto fail_wmi_handler;
1816         }
1817
1818         err = asus_wmi_debugfs_init(asus);
1819         if (err)
1820                 goto fail_debugfs;
1821
1822         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
1823         if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
1824                 asus->driver->wlan_ctrl_by_user = 1;
1825
1826         return 0;
1827
1828 fail_debugfs:
1829         wmi_remove_notify_handler(asus->driver->event_guid);
1830 fail_wmi_handler:
1831         asus_wmi_backlight_exit(asus);
1832 fail_backlight:
1833         asus_wmi_rfkill_exit(asus);
1834 fail_rfkill:
1835         asus_wmi_led_exit(asus);
1836 fail_leds:
1837         asus_wmi_hwmon_exit(asus);
1838 fail_hwmon:
1839         asus_wmi_input_exit(asus);
1840 fail_input:
1841         asus_wmi_platform_exit(asus);
1842 fail_platform:
1843         kfree(asus);
1844         return err;
1845 }
1846
1847 static int asus_wmi_remove(struct platform_device *device)
1848 {
1849         struct asus_wmi *asus;
1850
1851         asus = platform_get_drvdata(device);
1852         wmi_remove_notify_handler(asus->driver->event_guid);
1853         asus_wmi_backlight_exit(asus);
1854         asus_wmi_input_exit(asus);
1855         asus_wmi_hwmon_exit(asus);
1856         asus_wmi_led_exit(asus);
1857         asus_wmi_rfkill_exit(asus);
1858         asus_wmi_debugfs_exit(asus);
1859         asus_wmi_platform_exit(asus);
1860
1861         kfree(asus);
1862         return 0;
1863 }
1864
1865 /*
1866  * Platform driver - hibernate/resume callbacks
1867  */
1868 static int asus_hotk_thaw(struct device *device)
1869 {
1870         struct asus_wmi *asus = dev_get_drvdata(device);
1871
1872         if (asus->wlan.rfkill) {
1873                 bool wlan;
1874
1875                 /*
1876                  * Work around bios bug - acpi _PTS turns off the wireless led
1877                  * during suspend.  Normally it restores it on resume, but
1878                  * we should kick it ourselves in case hibernation is aborted.
1879                  */
1880                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1881                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1882         }
1883
1884         return 0;
1885 }
1886
1887 static int asus_hotk_restore(struct device *device)
1888 {
1889         struct asus_wmi *asus = dev_get_drvdata(device);
1890         int bl;
1891
1892         /* Refresh both wlan rfkill state and pci hotplug */
1893         if (asus->wlan.rfkill)
1894                 asus_rfkill_hotplug(asus);
1895
1896         if (asus->bluetooth.rfkill) {
1897                 bl = !asus_wmi_get_devstate_simple(asus,
1898                                                    ASUS_WMI_DEVID_BLUETOOTH);
1899                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1900         }
1901         if (asus->wimax.rfkill) {
1902                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1903                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1904         }
1905         if (asus->wwan3g.rfkill) {
1906                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1907                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1908         }
1909         if (asus->gps.rfkill) {
1910                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1911                 rfkill_set_sw_state(asus->gps.rfkill, bl);
1912         }
1913         if (asus->uwb.rfkill) {
1914                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1915                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1916         }
1917
1918         return 0;
1919 }
1920
1921 static const struct dev_pm_ops asus_pm_ops = {
1922         .thaw = asus_hotk_thaw,
1923         .restore = asus_hotk_restore,
1924 };
1925
1926 static int asus_wmi_probe(struct platform_device *pdev)
1927 {
1928         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1929         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1930         int ret;
1931
1932         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1933                 pr_warn("Management GUID not found\n");
1934                 return -ENODEV;
1935         }
1936
1937         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1938                 pr_warn("Event GUID not found\n");
1939                 return -ENODEV;
1940         }
1941
1942         if (wdrv->probe) {
1943                 ret = wdrv->probe(pdev);
1944                 if (ret)
1945                         return ret;
1946         }
1947
1948         return asus_wmi_add(pdev);
1949 }
1950
1951 static bool used;
1952
1953 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1954 {
1955         struct platform_driver *platform_driver;
1956         struct platform_device *platform_device;
1957
1958         if (used)
1959                 return -EBUSY;
1960
1961         platform_driver = &driver->platform_driver;
1962         platform_driver->remove = asus_wmi_remove;
1963         platform_driver->driver.owner = driver->owner;
1964         platform_driver->driver.name = driver->name;
1965         platform_driver->driver.pm = &asus_pm_ops;
1966
1967         platform_device = platform_create_bundle(platform_driver,
1968                                                  asus_wmi_probe,
1969                                                  NULL, 0, NULL, 0);
1970         if (IS_ERR(platform_device))
1971                 return PTR_ERR(platform_device);
1972
1973         used = true;
1974         return 0;
1975 }
1976 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1977
1978 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1979 {
1980         platform_device_unregister(driver->platform_device);
1981         platform_driver_unregister(&driver->platform_driver);
1982         used = false;
1983 }
1984 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1985
1986 static int __init asus_wmi_init(void)
1987 {
1988         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1989                 pr_info("Asus Management GUID not found\n");
1990                 return -ENODEV;
1991         }
1992
1993         pr_info("ASUS WMI generic driver loaded\n");
1994         return 0;
1995 }
1996
1997 static void __exit asus_wmi_exit(void)
1998 {
1999         pr_info("ASUS WMI generic driver unloaded\n");
2000 }
2001
2002 module_init(asus_wmi_init);
2003 module_exit(asus_wmi_exit);