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 <linux/dmi.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 platform_device *platform_device;
 188
 189         struct led_classdev wlan_led;
 190         int wlan_led_wk;
 191         struct led_classdev tpd_led;
 192         int tpd_led_wk;
 193         struct led_classdev kbd_led;
 194         int kbd_led_wk;
 195         struct workqueue_struct *led_workqueue;
 196         struct work_struct tpd_led_work;
 197         struct work_struct kbd_led_work;
 198         struct work_struct wlan_led_work;
 199
 200         struct asus_rfkill wlan;
 201         struct asus_rfkill bluetooth;
 202         struct asus_rfkill wimax;
 203         struct asus_rfkill wwan3g;
 204         struct asus_rfkill gps;
 205         struct asus_rfkill uwb;
 206
 207         struct hotplug_slot *hotplug_slot;
 208         struct mutex hotplug_lock;
 209         struct mutex wmi_lock;
 210         struct workqueue_struct *hotplug_workqueue;
 211         struct work_struct hotplug_work;
 212
 213         struct asus_wmi_debug debug;
 214
 215         struct asus_wmi_driver *driver;
 216 };
 217
 218 static int asus_wmi_input_init(struct asus_wmi *asus)
 219 {
 220         int err;
 221
 222         asus->inputdev = input_allocate_device();
 223         if (!asus->inputdev)
 224                 return -ENOMEM;
 225
 226         asus->inputdev->name = asus->driver->input_name;
 227         asus->inputdev->phys = asus->driver->input_phys;
 228         asus->inputdev->id.bustype = BUS_HOST;
 229         asus->inputdev->dev.parent = &asus->platform_device->dev;
 230         set_bit(EV_REP, asus->inputdev->evbit);
 231
 232         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
 233         if (err)
 234                 goto err_free_dev;
 235
 236         err = input_register_device(asus->inputdev);
 237         if (err)
 238                 goto err_free_keymap;
 239
 240         return 0;
 241
 242 err_free_keymap:
 243         sparse_keymap_free(asus->inputdev);
 244 err_free_dev:
 245         input_free_device(asus->inputdev);
 246         return err;
 247 }
 248
 249 static void asus_wmi_input_exit(struct asus_wmi *asus)
 250 {
 251         if (asus->inputdev) {
 252                 sparse_keymap_free(asus->inputdev);
 253                 input_unregister_device(asus->inputdev);
 254         }
 255
 256         asus->inputdev = NULL;
 257 }
 258
 259 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 260                                     u32 *retval)
 261 {
 262         struct bios_args args = {
 263                 .arg0 = arg0,
 264                 .arg1 = arg1,
 265         };
 266         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
 267         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 268         acpi_status status;
 269         union acpi_object *obj;
 270         u32 tmp = 0;
 271
 272         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
 273                                      &input, &output);
 274
 275         if (ACPI_FAILURE(status))
 276                 goto exit;
 277
 278         obj = (union acpi_object *)output.pointer;
 279         if (obj && obj->type == ACPI_TYPE_INTEGER)
 280                 tmp = (u32) obj->integer.value;
 281
 282         if (retval)
 283                 *retval = tmp;
 284
 285         kfree(obj);
 286
 287 exit:
 288         if (ACPI_FAILURE(status))
 289                 return -EIO;
 290
 291         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
 292                 return -ENODEV;
 293
 294         return 0;
 295 }
 296
 297 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 298 {
 299         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
 300 }
 301
 302 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 303                                  u32 *retval)
 304 {
 305         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 306                                         ctrl_param, retval);
 307 }
 308
 309 /* Helper for special devices with magic return codes */
 310 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
 311                                       u32 dev_id, u32 mask)
 312 {
 313         u32 retval = 0;
 314         int err;
 315
 316         err = asus_wmi_get_devstate(asus, dev_id, &retval);
 317
 318         if (err < 0)
 319                 return err;
 320
 321         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
 322                 return -ENODEV;
 323
 324         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
 325                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
 326                         return -ENODEV;
 327         }
 328
 329         return retval & mask;
 330 }
 331
 332 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
 333 {
 334         return asus_wmi_get_devstate_bits(asus, dev_id,
 335                                           ASUS_WMI_DSTS_STATUS_BIT);
 336 }
 337
 338 /*
 339  * LEDs
 340  */
 341 /*
 342  * These functions actually update the LED's, and are called from a
 343  * workqueue. By doing this as separate work rather than when the LED
 344  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 345  * potentially bad time, such as a timer interrupt.
 346  */
 347 static void tpd_led_update(struct work_struct *work)
 348 {
 349         int ctrl_param;
 350         struct asus_wmi *asus;
 351
 352         asus = container_of(work, struct asus_wmi, tpd_led_work);
 353
 354         ctrl_param = asus->tpd_led_wk;
 355         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
 356 }
 357
 358 static void tpd_led_set(struct led_classdev *led_cdev,
 359                         enum led_brightness value)
 360 {
 361         struct asus_wmi *asus;
 362
 363         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 364
 365         asus->tpd_led_wk = !!value;
 366         queue_work(asus->led_workqueue, &asus->tpd_led_work);
 367 }
 368
 369 static int read_tpd_led_state(struct asus_wmi *asus)
 370 {
 371         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
 372 }
 373
 374 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 375 {
 376         struct asus_wmi *asus;
 377
 378         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 379
 380         return read_tpd_led_state(asus);
 381 }
 382
 383 static void kbd_led_update(struct work_struct *work)
 384 {
 385         int ctrl_param = 0;
 386         struct asus_wmi *asus;
 387
 388         asus = container_of(work, struct asus_wmi, kbd_led_work);
 389
 390         /*
 391          * bits 0-2: level
 392          * bit 7: light on/off
 393          */
 394         if (asus->kbd_led_wk > 0)
 395                 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
 396
 397         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
 398 }
 399
 400 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 401 {
 402         int retval;
 403
 404         /*
 405          * bits 0-2: level
 406          * bit 7: light on/off
 407          * bit 8-10: environment (0: dark, 1: normal, 2: light)
 408          * bit 17: status unknown
 409          */
 410         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
 411                                             0xFFFF);
 412
 413         /* Unknown status is considered as off */
 414         if (retval == 0x8000)
 415                 retval = 0;
 416
 417         if (retval >= 0) {
 418                 if (level)
 419                         *level = retval & 0x7F;
 420                 if (env)
 421                         *env = (retval >> 8) & 0x7F;
 422                 retval = 0;
 423         }
 424
 425         return retval;
 426 }
 427
 428 static void kbd_led_set(struct led_classdev *led_cdev,
 429                         enum led_brightness value)
 430 {
 431         struct asus_wmi *asus;
 432
 433         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 434
 435         if (value > asus->kbd_led.max_brightness)
 436                 value = asus->kbd_led.max_brightness;
 437         else if (value < 0)
 438                 value = 0;
 439
 440         asus->kbd_led_wk = value;
 441         queue_work(asus->led_workqueue, &asus->kbd_led_work);
 442 }
 443
 444 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
 445 {
 446         struct asus_wmi *asus;
 447         int retval, value;
 448
 449         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 450
 451         retval = kbd_led_read(asus, &value, NULL);
 452
 453         if (retval < 0)
 454                 return retval;
 455
 456         return value;
 457 }
 458
 459 static int wlan_led_unknown_state(struct asus_wmi *asus)
 460 {
 461         u32 result;
 462
 463         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 464
 465         return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
 466 }
 467
 468 static int wlan_led_presence(struct asus_wmi *asus)
 469 {
 470         u32 result;
 471
 472         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 473
 474         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
 475 }
 476
 477 static void wlan_led_update(struct work_struct *work)
 478 {
 479         int ctrl_param;
 480         struct asus_wmi *asus;
 481
 482         asus = container_of(work, struct asus_wmi, wlan_led_work);
 483
 484         ctrl_param = asus->wlan_led_wk;
 485         asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
 486 }
 487
 488 static void wlan_led_set(struct led_classdev *led_cdev,
 489                          enum led_brightness value)
 490 {
 491         struct asus_wmi *asus;
 492
 493         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 494
 495         asus->wlan_led_wk = !!value;
 496         queue_work(asus->led_workqueue, &asus->wlan_led_work);
 497 }
 498
 499 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
 500 {
 501         struct asus_wmi *asus;
 502         u32 result;
 503
 504         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 505         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 506
 507         return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
 508 }
 509
 510 static void asus_wmi_led_exit(struct asus_wmi *asus)
 511 {
 512         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
 513                 led_classdev_unregister(&asus->kbd_led);
 514         if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
 515                 led_classdev_unregister(&asus->tpd_led);
 516         if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
 517                 led_classdev_unregister(&asus->wlan_led);
 518         if (asus->led_workqueue)
 519                 destroy_workqueue(asus->led_workqueue);
 520 }
 521
 522 static int asus_wmi_led_init(struct asus_wmi *asus)
 523 {
 524         int rv = 0;
 525
 526         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 527         if (!asus->led_workqueue)
 528                 return -ENOMEM;
 529
 530         if (read_tpd_led_state(asus) >= 0) {
 531                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 532
 533                 asus->tpd_led.name = "asus::touchpad";
 534                 asus->tpd_led.brightness_set = tpd_led_set;
 535                 asus->tpd_led.brightness_get = tpd_led_get;
 536                 asus->tpd_led.max_brightness = 1;
 537
 538                 rv = led_classdev_register(&asus->platform_device->dev,
 539                                            &asus->tpd_led);
 540                 if (rv)
 541                         goto error;
 542         }
 543
 544         if (kbd_led_read(asus, NULL, NULL) >= 0) {
 545                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
 546
 547                 asus->kbd_led.name = "asus::kbd_backlight";
 548                 asus->kbd_led.brightness_set = kbd_led_set;
 549                 asus->kbd_led.brightness_get = kbd_led_get;
 550                 asus->kbd_led.max_brightness = 3;
 551
 552                 rv = led_classdev_register(&asus->platform_device->dev,
 553                                            &asus->kbd_led);
 554                 if (rv)
 555                         goto error;
 556         }
 557
 558         if (wlan_led_presence(asus) && (asus->driver->quirks->wapf > 0)) {
 559                 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
 560
 561                 asus->wlan_led.name = "asus::wlan";
 562                 asus->wlan_led.brightness_set = wlan_led_set;
 563                 if (!wlan_led_unknown_state(asus))
 564                         asus->wlan_led.brightness_get = wlan_led_get;
 565                 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
 566                 asus->wlan_led.max_brightness = 1;
 567                 asus->wlan_led.default_trigger = "asus-wlan";
 568
 569                 rv = led_classdev_register(&asus->platform_device->dev,
 570                                            &asus->wlan_led);
 571         }
 572
 573 error:
 574         if (rv)
 575                 asus_wmi_led_exit(asus);
 576
 577         return rv;
 578 }
 579
 580
 581 /*
 582  * PCI hotplug (for wlan rfkill)
 583  */
 584 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 585 {
 586         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 587
 588         if (result < 0)
 589                 return false;
 590         return !result;
 591 }
 592
 593 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 594 {
 595         struct pci_dev *dev;
 596         struct pci_bus *bus;
 597         bool blocked;
 598         bool absent;
 599         u32 l;
 600
 601         mutex_lock(&asus->wmi_lock);
 602         blocked = asus_wlan_rfkill_blocked(asus);
 603         mutex_unlock(&asus->wmi_lock);
 604
 605         mutex_lock(&asus->hotplug_lock);
 606         pci_lock_rescan_remove();
 607
 608         if (asus->wlan.rfkill)
 609                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 610
 611         if (asus->hotplug_slot) {
 612                 bus = pci_find_bus(0, 1);
 613                 if (!bus) {
 614                         pr_warn("Unable to find PCI bus 1?\n");
 615                         goto out_unlock;
 616                 }
 617
 618                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 619                         pr_err("Unable to read PCI config space?\n");
 620                         goto out_unlock;
 621                 }
 622                 absent = (l == 0xffffffff);
 623
 624                 if (blocked != absent) {
 625                         pr_warn("BIOS says wireless lan is %s, "
 626                                 "but the pci device is %s\n",
 627                                 blocked ? "blocked" : "unblocked",
 628                                 absent ? "absent" : "present");
 629                         pr_warn("skipped wireless hotplug as probably "
 630                                 "inappropriate for this model\n");
 631                         goto out_unlock;
 632                 }
 633
 634                 if (!blocked) {
 635                         dev = pci_get_slot(bus, 0);
 636                         if (dev) {
 637                                 /* Device already present */
 638                                 pci_dev_put(dev);
 639                                 goto out_unlock;
 640                         }
 641                         dev = pci_scan_single_device(bus, 0);
 642                         if (dev) {
 643                                 pci_bus_assign_resources(bus);
 644                                 pci_bus_add_device(dev);
 645                         }
 646                 } else {
 647                         dev = pci_get_slot(bus, 0);
 648                         if (dev) {
 649                                 pci_stop_and_remove_bus_device(dev);
 650                                 pci_dev_put(dev);
 651                         }
 652                 }
 653         }
 654
 655 out_unlock:
 656         pci_unlock_rescan_remove();
 657         mutex_unlock(&asus->hotplug_lock);
 658 }
 659
 660 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
 661 {
 662         struct asus_wmi *asus = data;
 663
 664         if (event != ACPI_NOTIFY_BUS_CHECK)
 665                 return;
 666
 667         /*
 668          * We can't call directly asus_rfkill_hotplug because most
 669          * of the time WMBC is still being executed and not reetrant.
 670          * There is currently no way to tell ACPICA that  we want this
 671          * method to be serialized, we schedule a asus_rfkill_hotplug
 672          * call later, in a safer context.
 673          */
 674         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
 675 }
 676
 677 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 678 {
 679         acpi_status status;
 680         acpi_handle handle;
 681
 682         status = acpi_get_handle(NULL, node, &handle);
 683
 684         if (ACPI_SUCCESS(status)) {
 685                 status = acpi_install_notify_handler(handle,
 686                                                      ACPI_SYSTEM_NOTIFY,
 687                                                      asus_rfkill_notify, asus);
 688                 if (ACPI_FAILURE(status))
 689                         pr_warn("Failed to register notify on %s\n", node);
 690         } else
 691                 return -ENODEV;
 692
 693         return 0;
 694 }
 695
 696 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 697 {
 698         acpi_status status = AE_OK;
 699         acpi_handle handle;
 700
 701         status = acpi_get_handle(NULL, node, &handle);
 702
 703         if (ACPI_SUCCESS(status)) {
 704                 status = acpi_remove_notify_handler(handle,
 705                                                     ACPI_SYSTEM_NOTIFY,
 706                                                     asus_rfkill_notify);
 707                 if (ACPI_FAILURE(status))
 708                         pr_err("Error removing rfkill notify handler %s\n",
 709                                node);
 710         }
 711 }
 712
 713 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
 714                                    u8 *value)
 715 {
 716         struct asus_wmi *asus = hotplug_slot->private;
 717         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 718
 719         if (result < 0)
 720                 return result;
 721
 722         *value = !!result;
 723         return 0;
 724 }
 725
 726 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 727 {
 728         kfree(hotplug_slot->info);
 729         kfree(hotplug_slot);
 730 }
 731
 732 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
 733         .owner = THIS_MODULE,
 734         .get_adapter_status = asus_get_adapter_status,
 735         .get_power_status = asus_get_adapter_status,
 736 };
 737
 738 static void asus_hotplug_work(struct work_struct *work)
 739 {
 740         struct asus_wmi *asus;
 741
 742         asus = container_of(work, struct asus_wmi, hotplug_work);
 743         asus_rfkill_hotplug(asus);
 744 }
 745
 746 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
 747 {
 748         int ret = -ENOMEM;
 749         struct pci_bus *bus = pci_find_bus(0, 1);
 750
 751         if (!bus) {
 752                 pr_err("Unable to find wifi PCI bus\n");
 753                 return -ENODEV;
 754         }
 755
 756         asus->hotplug_workqueue =
 757             create_singlethread_workqueue("hotplug_workqueue");
 758         if (!asus->hotplug_workqueue)
 759                 goto error_workqueue;
 760
 761         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
 762
 763         asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 764         if (!asus->hotplug_slot)
 765                 goto error_slot;
 766
 767         asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 768                                            GFP_KERNEL);
 769         if (!asus->hotplug_slot->info)
 770                 goto error_info;
 771
 772         asus->hotplug_slot->private = asus;
 773         asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
 774         asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
 775         asus_get_adapter_status(asus->hotplug_slot,
 776                                 &asus->hotplug_slot->info->adapter_status);
 777
 778         ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
 779         if (ret) {
 780                 pr_err("Unable to register hotplug slot - %d\n", ret);
 781                 goto error_register;
 782         }
 783
 784         return 0;
 785
 786 error_register:
 787         kfree(asus->hotplug_slot->info);
 788 error_info:
 789         kfree(asus->hotplug_slot);
 790         asus->hotplug_slot = NULL;
 791 error_slot:
 792         destroy_workqueue(asus->hotplug_workqueue);
 793 error_workqueue:
 794         return ret;
 795 }
 796
 797 /*
 798  * Rfkill devices
 799  */
 800 static int asus_rfkill_set(void *data, bool blocked)
 801 {
 802         struct asus_rfkill *priv = data;
 803         u32 ctrl_param = !blocked;
 804         u32 dev_id = priv->dev_id;
 805
 806         /*
 807          * If the user bit is set, BIOS can't set and record the wlan status,
 808          * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
 809          * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
 810          * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
 811          * while setting the wlan status through WMI.
 812          * This is also the behavior that windows app will do.
 813          */
 814         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 815              priv->asus->driver->wlan_ctrl_by_user)
 816                 dev_id = ASUS_WMI_DEVID_WLAN_LED;
 817
 818         return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
 819 }
 820
 821 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
 822 {
 823         struct asus_rfkill *priv = data;
 824         int result;
 825
 826         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
 827
 828         if (result < 0)
 829                 return;
 830
 831         rfkill_set_sw_state(priv->rfkill, !result);
 832 }
 833
 834 static int asus_rfkill_wlan_set(void *data, bool blocked)
 835 {
 836         struct asus_rfkill *priv = data;
 837         struct asus_wmi *asus = priv->asus;
 838         int ret;
 839
 840         /*
 841          * This handler is enabled only if hotplug is enabled.
 842          * In this case, the asus_wmi_set_devstate() will
 843          * trigger a wmi notification and we need to wait
 844          * this call to finish before being able to call
 845          * any wmi method
 846          */
 847         mutex_lock(&asus->wmi_lock);
 848         ret = asus_rfkill_set(data, blocked);
 849         mutex_unlock(&asus->wmi_lock);
 850         return ret;
 851 }
 852
 853 static const struct rfkill_ops asus_rfkill_wlan_ops = {
 854         .set_block = asus_rfkill_wlan_set,
 855         .query = asus_rfkill_query,
 856 };
 857
 858 static const struct rfkill_ops asus_rfkill_ops = {
 859         .set_block = asus_rfkill_set,
 860         .query = asus_rfkill_query,
 861 };
 862
 863 static int asus_new_rfkill(struct asus_wmi *asus,
 864                            struct asus_rfkill *arfkill,
 865                            const char *name, enum rfkill_type type, int dev_id)
 866 {
 867         int result = asus_wmi_get_devstate_simple(asus, dev_id);
 868         struct rfkill **rfkill = &arfkill->rfkill;
 869
 870         if (result < 0)
 871                 return result;
 872
 873         arfkill->dev_id = dev_id;
 874         arfkill->asus = asus;
 875
 876         if (dev_id == ASUS_WMI_DEVID_WLAN &&
 877             asus->driver->quirks->hotplug_wireless)
 878                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 879                                        &asus_rfkill_wlan_ops, arfkill);
 880         else
 881                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 882                                        &asus_rfkill_ops, arfkill);
 883
 884         if (!*rfkill)
 885                 return -EINVAL;
 886
 887         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 888                         (asus->driver->quirks->wapf > 0))
 889                 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
 890
 891         rfkill_init_sw_state(*rfkill, !result);
 892         result = rfkill_register(*rfkill);
 893         if (result) {
 894                 rfkill_destroy(*rfkill);
 895                 *rfkill = NULL;
 896                 return result;
 897         }
 898         return 0;
 899 }
 900
 901 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
 902 {
 903         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 904         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 905         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 906         if (asus->wlan.rfkill) {
 907                 rfkill_unregister(asus->wlan.rfkill);
 908                 rfkill_destroy(asus->wlan.rfkill);
 909                 asus->wlan.rfkill = NULL;
 910         }
 911         /*
 912          * Refresh pci hotplug in case the rfkill state was changed after
 913          * asus_unregister_rfkill_notifier()
 914          */
 915         asus_rfkill_hotplug(asus);
 916         if (asus->hotplug_slot)
 917                 pci_hp_deregister(asus->hotplug_slot);
 918         if (asus->hotplug_workqueue)
 919                 destroy_workqueue(asus->hotplug_workqueue);
 920
 921         if (asus->bluetooth.rfkill) {
 922                 rfkill_unregister(asus->bluetooth.rfkill);
 923                 rfkill_destroy(asus->bluetooth.rfkill);
 924                 asus->bluetooth.rfkill = NULL;
 925         }
 926         if (asus->wimax.rfkill) {
 927                 rfkill_unregister(asus->wimax.rfkill);
 928                 rfkill_destroy(asus->wimax.rfkill);
 929                 asus->wimax.rfkill = NULL;
 930         }
 931         if (asus->wwan3g.rfkill) {
 932                 rfkill_unregister(asus->wwan3g.rfkill);
 933                 rfkill_destroy(asus->wwan3g.rfkill);
 934                 asus->wwan3g.rfkill = NULL;
 935         }
 936         if (asus->gps.rfkill) {
 937                 rfkill_unregister(asus->gps.rfkill);
 938                 rfkill_destroy(asus->gps.rfkill);
 939                 asus->gps.rfkill = NULL;
 940         }
 941         if (asus->uwb.rfkill) {
 942                 rfkill_unregister(asus->uwb.rfkill);
 943                 rfkill_destroy(asus->uwb.rfkill);
 944                 asus->uwb.rfkill = NULL;
 945         }
 946 }
 947
 948 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
 949 {
 950         int result = 0;
 951
 952         mutex_init(&asus->hotplug_lock);
 953         mutex_init(&asus->wmi_lock);
 954
 955         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
 956                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
 957
 958         if (result && result != -ENODEV)
 959                 goto exit;
 960
 961         result = asus_new_rfkill(asus, &asus->bluetooth,
 962                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
 963                                  ASUS_WMI_DEVID_BLUETOOTH);
 964
 965         if (result && result != -ENODEV)
 966                 goto exit;
 967
 968         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
 969                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
 970
 971         if (result && result != -ENODEV)
 972                 goto exit;
 973
 974         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
 975                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
 976
 977         if (result && result != -ENODEV)
 978                 goto exit;
 979
 980         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
 981                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
 982
 983         if (result && result != -ENODEV)
 984                 goto exit;
 985
 986         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
 987                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
 988
 989         if (result && result != -ENODEV)
 990                 goto exit;
 991
 992         if (!asus->driver->quirks->hotplug_wireless)
 993                 goto exit;
 994
 995         result = asus_setup_pci_hotplug(asus);
 996         /*
 997          * If we get -EBUSY then something else is handling the PCI hotplug -
 998          * don't fail in this case
 999          */
1000         if (result == -EBUSY)
1001                 result = 0;
1002
1003         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1004         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1005         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1006         /*
1007          * Refresh pci hotplug in case the rfkill state was changed during
1008          * setup.
1009          */
1010         asus_rfkill_hotplug(asus);
1011
1012 exit:
1013         if (result && result != -ENODEV)
1014                 asus_wmi_rfkill_exit(asus);
1015
1016         if (result == -ENODEV)
1017                 result = 0;
1018
1019         return result;
1020 }
1021
1022 /*
1023  * Hwmon device
1024  */
1025 static ssize_t asus_hwmon_pwm1(struct device *dev,
1026                                struct device_attribute *attr,
1027                                char *buf)
1028 {
1029         struct asus_wmi *asus = dev_get_drvdata(dev);
1030         u32 value;
1031         int err;
1032
1033         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
1034
1035         if (err < 0)
1036                 return err;
1037
1038         value &= 0xFF;
1039
1040         if (value == 1) /* Low Speed */
1041                 value = 85;
1042         else if (value == 2)
1043                 value = 170;
1044         else if (value == 3)
1045                 value = 255;
1046         else if (value != 0) {
1047                 pr_err("Unknown fan speed %#x\n", value);
1048                 value = -1;
1049         }
1050
1051         return sprintf(buf, "%d\n", value);
1052 }
1053
1054 static ssize_t asus_hwmon_temp1(struct device *dev,
1055                                 struct device_attribute *attr,
1056                                 char *buf)
1057 {
1058         struct asus_wmi *asus = dev_get_drvdata(dev);
1059         u32 value;
1060         int err;
1061
1062         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1063
1064         if (err < 0)
1065                 return err;
1066
1067         value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1068
1069         return sprintf(buf, "%d\n", value);
1070 }
1071
1072 static DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL);
1073 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1074
1075 static struct attribute *hwmon_attributes[] = {
1076         &dev_attr_pwm1.attr,
1077         &dev_attr_temp1_input.attr,
1078         NULL
1079 };
1080
1081 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1082                                           struct attribute *attr, int idx)
1083 {
1084         struct device *dev = container_of(kobj, struct device, kobj);
1085         struct platform_device *pdev = to_platform_device(dev->parent);
1086         struct asus_wmi *asus = platform_get_drvdata(pdev);
1087         bool ok = true;
1088         int dev_id = -1;
1089         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1090
1091         if (attr == &dev_attr_pwm1.attr)
1092                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1093         else if (attr == &dev_attr_temp1_input.attr)
1094                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1095
1096         if (dev_id != -1) {
1097                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1098
1099                 if (err < 0)
1100                         return 0; /* can't return negative here */
1101         }
1102
1103         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1104                 /*
1105                  * We need to find a better way, probably using sfun,
1106                  * bits or spec ...
1107                  * Currently we disable it if:
1108                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1109                  * - reverved bits are non-zero
1110                  * - sfun and presence bit are not set
1111                  */
1112                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1113                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1114                         ok = false;
1115         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1116                 /* If value is zero, something is clearly wrong */
1117                 if (value == 0)
1118                         ok = false;
1119         }
1120
1121         return ok ? attr->mode : 0;
1122 }
1123
1124 static struct attribute_group hwmon_attribute_group = {
1125         .is_visible = asus_hwmon_sysfs_is_visible,
1126         .attrs = hwmon_attributes
1127 };
1128 __ATTRIBUTE_GROUPS(hwmon_attribute);
1129
1130 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1131 {
1132         struct device *hwmon;
1133
1134         hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1135                                                   "asus", asus,
1136                                                   hwmon_attribute_groups);
1137         if (IS_ERR(hwmon)) {
1138                 pr_err("Could not register asus hwmon device\n");
1139                 return PTR_ERR(hwmon);
1140         }
1141         return 0;
1142 }
1143
1144 /*
1145  * Backlight
1146  */
1147 static int read_backlight_power(struct asus_wmi *asus)
1148 {
1149         int ret;
1150         if (asus->driver->quirks->store_backlight_power)
1151                 ret = !asus->driver->panel_power;
1152         else
1153                 ret = asus_wmi_get_devstate_simple(asus,
1154                                                    ASUS_WMI_DEVID_BACKLIGHT);
1155
1156         if (ret < 0)
1157                 return ret;
1158
1159         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1160 }
1161
1162 static int read_brightness_max(struct asus_wmi *asus)
1163 {
1164         u32 retval;
1165         int err;
1166
1167         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1168
1169         if (err < 0)
1170                 return err;
1171
1172         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1173         retval >>= 8;
1174
1175         if (!retval)
1176                 return -ENODEV;
1177
1178         return retval;
1179 }
1180
1181 static int read_brightness(struct backlight_device *bd)
1182 {
1183         struct asus_wmi *asus = bl_get_data(bd);
1184         u32 retval;
1185         int err;
1186
1187         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1188
1189         if (err < 0)
1190                 return err;
1191
1192         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1193 }
1194
1195 static u32 get_scalar_command(struct backlight_device *bd)
1196 {
1197         struct asus_wmi *asus = bl_get_data(bd);
1198         u32 ctrl_param = 0;
1199
1200         if ((asus->driver->brightness < bd->props.brightness) ||
1201             bd->props.brightness == bd->props.max_brightness)
1202                 ctrl_param = 0x00008001;
1203         else if ((asus->driver->brightness > bd->props.brightness) ||
1204                  bd->props.brightness == 0)
1205                 ctrl_param = 0x00008000;
1206
1207         asus->driver->brightness = bd->props.brightness;
1208
1209         return ctrl_param;
1210 }
1211
1212 static int update_bl_status(struct backlight_device *bd)
1213 {
1214         struct asus_wmi *asus = bl_get_data(bd);
1215         u32 ctrl_param;
1216         int power, err = 0;
1217
1218         power = read_backlight_power(asus);
1219         if (power != -ENODEV && bd->props.power != power) {
1220                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1221                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1222                                             ctrl_param, NULL);
1223                 if (asus->driver->quirks->store_backlight_power)
1224                         asus->driver->panel_power = bd->props.power;
1225
1226                 /* When using scalar brightness, updating the brightness
1227                  * will mess with the backlight power */
1228                 if (asus->driver->quirks->scalar_panel_brightness)
1229                         return err;
1230         }
1231
1232         if (asus->driver->quirks->scalar_panel_brightness)
1233                 ctrl_param = get_scalar_command(bd);
1234         else
1235                 ctrl_param = bd->props.brightness;
1236
1237         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1238                                     ctrl_param, NULL);
1239
1240         return err;
1241 }
1242
1243 static const struct backlight_ops asus_wmi_bl_ops = {
1244         .get_brightness = read_brightness,
1245         .update_status = update_bl_status,
1246 };
1247
1248 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1249 {
1250         struct backlight_device *bd = asus->backlight_device;
1251         int old = bd->props.brightness;
1252         int new = old;
1253
1254         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1255                 new = code - NOTIFY_BRNUP_MIN + 1;
1256         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1257                 new = code - NOTIFY_BRNDOWN_MIN;
1258
1259         bd->props.brightness = new;
1260         backlight_update_status(bd);
1261         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1262
1263         return old;
1264 }
1265
1266 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1267 {
1268         struct backlight_device *bd;
1269         struct backlight_properties props;
1270         int max;
1271         int power;
1272
1273         max = read_brightness_max(asus);
1274         if (max < 0)
1275                 return max;
1276
1277         power = read_backlight_power(asus);
1278
1279         if (power == -ENODEV)
1280                 power = FB_BLANK_UNBLANK;
1281         else if (power < 0)
1282                 return power;
1283
1284         memset(&props, 0, sizeof(struct backlight_properties));
1285         props.type = BACKLIGHT_PLATFORM;
1286         props.max_brightness = max;
1287         bd = backlight_device_register(asus->driver->name,
1288                                        &asus->platform_device->dev, asus,
1289                                        &asus_wmi_bl_ops, &props);
1290         if (IS_ERR(bd)) {
1291                 pr_err("Could not register backlight device\n");
1292                 return PTR_ERR(bd);
1293         }
1294
1295         asus->backlight_device = bd;
1296
1297         if (asus->driver->quirks->store_backlight_power)
1298                 asus->driver->panel_power = power;
1299
1300         bd->props.brightness = read_brightness(bd);
1301         bd->props.power = power;
1302         backlight_update_status(bd);
1303
1304         asus->driver->brightness = bd->props.brightness;
1305
1306         return 0;
1307 }
1308
1309 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1310 {
1311         backlight_device_unregister(asus->backlight_device);
1312
1313         asus->backlight_device = NULL;
1314 }
1315
1316 static int is_display_toggle(int code)
1317 {
1318         /* display toggle keys */
1319         if ((code >= 0x61 && code <= 0x67) ||
1320             (code >= 0x8c && code <= 0x93) ||
1321             (code >= 0xa0 && code <= 0xa7) ||
1322             (code >= 0xd0 && code <= 0xd5))
1323                 return 1;
1324
1325         return 0;
1326 }
1327
1328 static void asus_wmi_notify(u32 value, void *context)
1329 {
1330         struct asus_wmi *asus = context;
1331         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1332         union acpi_object *obj;
1333         acpi_status status;
1334         int code;
1335         int orig_code;
1336         unsigned int key_value = 1;
1337         bool autorelease = 1;
1338
1339         status = wmi_get_event_data(value, &response);
1340         if (status != AE_OK) {
1341                 pr_err("bad event status 0x%x\n", status);
1342                 return;
1343         }
1344
1345         obj = (union acpi_object *)response.pointer;
1346
1347         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1348                 goto exit;
1349
1350         code = obj->integer.value;
1351         orig_code = code;
1352
1353         if (asus->driver->key_filter) {
1354                 asus->driver->key_filter(asus->driver, &code, &key_value,
1355                                          &autorelease);
1356                 if (code == ASUS_WMI_KEY_IGNORE)
1357                         goto exit;
1358         }
1359
1360         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1361                 code = ASUS_WMI_BRN_UP;
1362         else if (code >= NOTIFY_BRNDOWN_MIN &&
1363                  code <= NOTIFY_BRNDOWN_MAX)
1364                 code = ASUS_WMI_BRN_DOWN;
1365
1366         if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1367                 if (!acpi_video_backlight_support()) {
1368                         asus_wmi_backlight_notify(asus, orig_code);
1369                         goto exit;
1370                 }
1371         }
1372
1373         if (is_display_toggle(code) &&
1374             asus->driver->quirks->no_display_toggle)
1375                 goto exit;
1376
1377         if (!sparse_keymap_report_event(asus->inputdev, code,
1378                                         key_value, autorelease))
1379                 pr_info("Unknown key %x pressed\n", code);
1380
1381 exit:
1382         kfree(obj);
1383 }
1384
1385 /*
1386  * Sys helpers
1387  */
1388 static int parse_arg(const char *buf, unsigned long count, int *val)
1389 {
1390         if (!count)
1391                 return 0;
1392         if (sscanf(buf, "%i", val) != 1)
1393                 return -EINVAL;
1394         return count;
1395 }
1396
1397 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1398                              const char *buf, size_t count)
1399 {
1400         u32 retval;
1401         int rv, err, value;
1402
1403         value = asus_wmi_get_devstate_simple(asus, devid);
1404         if (value == -ENODEV)   /* Check device presence */
1405                 return value;
1406
1407         rv = parse_arg(buf, count, &value);
1408         err = asus_wmi_set_devstate(devid, value, &retval);
1409
1410         if (err < 0)
1411                 return err;
1412
1413         return rv;
1414 }
1415
1416 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1417 {
1418         int value = asus_wmi_get_devstate_simple(asus, devid);
1419
1420         if (value < 0)
1421                 return value;
1422
1423         return sprintf(buf, "%d\n", value);
1424 }
1425
1426 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1427         static ssize_t show_##_name(struct device *dev,                 \
1428                                     struct device_attribute *attr,      \
1429                                     char *buf)                          \
1430         {                                                               \
1431                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1432                                                                         \
1433                 return show_sys_wmi(asus, _cm, buf);                    \
1434         }                                                               \
1435         static ssize_t store_##_name(struct device *dev,                \
1436                                      struct device_attribute *attr,     \
1437                                      const char *buf, size_t count)     \
1438         {                                                               \
1439                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1440                                                                         \
1441                 return store_sys_wmi(asus, _cm, buf, count);            \
1442         }                                                               \
1443         static struct device_attribute dev_attr_##_name = {             \
1444                 .attr = {                                               \
1445                         .name = __stringify(_name),                     \
1446                         .mode = _mode },                                \
1447                 .show   = show_##_name,                                 \
1448                 .store  = store_##_name,                                \
1449         }
1450
1451 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1452 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1453 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1454 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1455
1456 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1457                            const char *buf, size_t count)
1458 {
1459         int value, rv;
1460
1461         if (!count || sscanf(buf, "%i", &value) != 1)
1462                 return -EINVAL;
1463         if (value < 0 || value > 2)
1464                 return -EINVAL;
1465
1466         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1467         if (rv < 0)
1468                 return rv;
1469
1470         return count;
1471 }
1472
1473 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1474
1475 static struct attribute *platform_attributes[] = {
1476         &dev_attr_cpufv.attr,
1477         &dev_attr_camera.attr,
1478         &dev_attr_cardr.attr,
1479         &dev_attr_touchpad.attr,
1480         &dev_attr_lid_resume.attr,
1481         NULL
1482 };
1483
1484 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1485                                     struct attribute *attr, int idx)
1486 {
1487         struct device *dev = container_of(kobj, struct device, kobj);
1488         struct platform_device *pdev = to_platform_device(dev);
1489         struct asus_wmi *asus = platform_get_drvdata(pdev);
1490         bool ok = true;
1491         int devid = -1;
1492
1493         if (attr == &dev_attr_camera.attr)
1494                 devid = ASUS_WMI_DEVID_CAMERA;
1495         else if (attr == &dev_attr_cardr.attr)
1496                 devid = ASUS_WMI_DEVID_CARDREADER;
1497         else if (attr == &dev_attr_touchpad.attr)
1498                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1499         else if (attr == &dev_attr_lid_resume.attr)
1500                 devid = ASUS_WMI_DEVID_LID_RESUME;
1501
1502         if (devid != -1)
1503                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1504
1505         return ok ? attr->mode : 0;
1506 }
1507
1508 static struct attribute_group platform_attribute_group = {
1509         .is_visible = asus_sysfs_is_visible,
1510         .attrs = platform_attributes
1511 };
1512
1513 static void asus_wmi_sysfs_exit(struct platform_device *device)
1514 {
1515         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1516 }
1517
1518 static int asus_wmi_sysfs_init(struct platform_device *device)
1519 {
1520         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1521 }
1522
1523 /*
1524  * Platform device
1525  */
1526 static int asus_wmi_platform_init(struct asus_wmi *asus)
1527 {
1528         int rv;
1529
1530         /* INIT enable hotkeys on some models */
1531         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1532                 pr_info("Initialization: %#x\n", rv);
1533
1534         /* We don't know yet what to do with this version... */
1535         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1536                 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1537                 asus->spec = rv;
1538         }
1539
1540         /*
1541          * The SFUN method probably allows the original driver to get the list
1542          * of features supported by a given model. For now, 0x0100 or 0x0800
1543          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1544          * The significance of others is yet to be found.
1545          */
1546         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1547                 pr_info("SFUN value: %#x\n", rv);
1548                 asus->sfun = rv;
1549         }
1550
1551         /*
1552          * Eee PC and Notebooks seems to have different method_id for DSTS,
1553          * but it may also be related to the BIOS's SPEC.
1554          * Note, on most Eeepc, there is no way to check if a method exist
1555          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1556          * but once again, SPEC may probably be used for that kind of things.
1557          */
1558         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1559                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1560         else
1561                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1562
1563         /* CWAP allow to define the behavior of the Fn+F2 key,
1564          * this method doesn't seems to be present on Eee PCs */
1565         if (asus->driver->quirks->wapf >= 0)
1566                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1567                                       asus->driver->quirks->wapf, NULL);
1568
1569         return asus_wmi_sysfs_init(asus->platform_device);
1570 }
1571
1572 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1573 {
1574         asus_wmi_sysfs_exit(asus->platform_device);
1575 }
1576
1577 /*
1578  * debugfs
1579  */
1580 struct asus_wmi_debugfs_node {
1581         struct asus_wmi *asus;
1582         char *name;
1583         int (*show) (struct seq_file *m, void *data);
1584 };
1585
1586 static int show_dsts(struct seq_file *m, void *data)
1587 {
1588         struct asus_wmi *asus = m->private;
1589         int err;
1590         u32 retval = -1;
1591
1592         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1593
1594         if (err < 0)
1595                 return err;
1596
1597         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1598
1599         return 0;
1600 }
1601
1602 static int show_devs(struct seq_file *m, void *data)
1603 {
1604         struct asus_wmi *asus = m->private;
1605         int err;
1606         u32 retval = -1;
1607
1608         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1609                                     &retval);
1610
1611         if (err < 0)
1612                 return err;
1613
1614         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1615                    asus->debug.ctrl_param, retval);
1616
1617         return 0;
1618 }
1619
1620 static int show_call(struct seq_file *m, void *data)
1621 {
1622         struct asus_wmi *asus = m->private;
1623         struct bios_args args = {
1624                 .arg0 = asus->debug.dev_id,
1625                 .arg1 = asus->debug.ctrl_param,
1626         };
1627         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1628         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1629         union acpi_object *obj;
1630         acpi_status status;
1631
1632         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1633                                      1, asus->debug.method_id,
1634                                      &input, &output);
1635
1636         if (ACPI_FAILURE(status))
1637                 return -EIO;
1638
1639         obj = (union acpi_object *)output.pointer;
1640         if (obj && obj->type == ACPI_TYPE_INTEGER)
1641                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1642                            asus->debug.dev_id, asus->debug.ctrl_param,
1643                            (u32) obj->integer.value);
1644         else
1645                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1646                            asus->debug.dev_id, asus->debug.ctrl_param,
1647                            obj ? obj->type : -1);
1648
1649         kfree(obj);
1650
1651         return 0;
1652 }
1653
1654 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1655         {NULL, "devs", show_devs},
1656         {NULL, "dsts", show_dsts},
1657         {NULL, "call", show_call},
1658 };
1659
1660 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1661 {
1662         struct asus_wmi_debugfs_node *node = inode->i_private;
1663
1664         return single_open(file, node->show, node->asus);
1665 }
1666
1667 static const struct file_operations asus_wmi_debugfs_io_ops = {
1668         .owner = THIS_MODULE,
1669         .open = asus_wmi_debugfs_open,
1670         .read = seq_read,
1671         .llseek = seq_lseek,
1672         .release = single_release,
1673 };
1674
1675 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1676 {
1677         debugfs_remove_recursive(asus->debug.root);
1678 }
1679
1680 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1681 {
1682         struct dentry *dent;
1683         int i;
1684
1685         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1686         if (!asus->debug.root) {
1687                 pr_err("failed to create debugfs directory\n");
1688                 goto error_debugfs;
1689         }
1690
1691         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1692                                   asus->debug.root, &asus->debug.method_id);
1693         if (!dent)
1694                 goto error_debugfs;
1695
1696         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1697                                   asus->debug.root, &asus->debug.dev_id);
1698         if (!dent)
1699                 goto error_debugfs;
1700
1701         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1702                                   asus->debug.root, &asus->debug.ctrl_param);
1703         if (!dent)
1704                 goto error_debugfs;
1705
1706         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1707                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1708
1709                 node->asus = asus;
1710                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1711                                            asus->debug.root, node,
1712                                            &asus_wmi_debugfs_io_ops);
1713                 if (!dent) {
1714                         pr_err("failed to create debug file: %s\n", node->name);
1715                         goto error_debugfs;
1716                 }
1717         }
1718
1719         return 0;
1720
1721 error_debugfs:
1722         asus_wmi_debugfs_exit(asus);
1723         return -ENOMEM;
1724 }
1725
1726 /*
1727  * WMI Driver
1728  */
1729 static int asus_wmi_add(struct platform_device *pdev)
1730 {
1731         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1732         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1733         struct asus_wmi *asus;
1734         const char *chassis_type;
1735         acpi_status status;
1736         int err;
1737         u32 result;
1738
1739         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1740         if (!asus)
1741                 return -ENOMEM;
1742
1743         asus->driver = wdrv;
1744         asus->platform_device = pdev;
1745         wdrv->platform_device = pdev;
1746         platform_set_drvdata(asus->platform_device, asus);
1747
1748         if (wdrv->detect_quirks)
1749                 wdrv->detect_quirks(asus->driver);
1750
1751         err = asus_wmi_platform_init(asus);
1752         if (err)
1753                 goto fail_platform;
1754
1755         err = asus_wmi_input_init(asus);
1756         if (err)
1757                 goto fail_input;
1758
1759         err = asus_wmi_hwmon_init(asus);
1760         if (err)
1761                 goto fail_hwmon;
1762
1763         err = asus_wmi_led_init(asus);
1764         if (err)
1765                 goto fail_leds;
1766
1767         err = asus_wmi_rfkill_init(asus);
1768         if (err)
1769                 goto fail_rfkill;
1770
1771         /* Some Asus desktop boards export an acpi-video backlight interface,
1772            stop this from showing up */
1773         chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
1774         if (chassis_type && !strcmp(chassis_type, "3"))
1775                 acpi_video_dmi_promote_vendor();
1776         if (asus->driver->quirks->wmi_backlight_power)
1777                 acpi_video_dmi_promote_vendor();
1778         if (!acpi_video_backlight_support()) {
1779                 pr_info("Disabling ACPI video driver\n");
1780                 acpi_video_unregister_backlight();
1781                 err = asus_wmi_backlight_init(asus);
1782                 if (err && err != -ENODEV)
1783                         goto fail_backlight;
1784         } else
1785                 pr_info("Backlight controlled by ACPI video driver\n");
1786
1787         status = wmi_install_notify_handler(asus->driver->event_guid,
1788                                             asus_wmi_notify, asus);
1789         if (ACPI_FAILURE(status)) {
1790                 pr_err("Unable to register notify handler - %d\n", status);
1791                 err = -ENODEV;
1792                 goto fail_wmi_handler;
1793         }
1794
1795         err = asus_wmi_debugfs_init(asus);
1796         if (err)
1797                 goto fail_debugfs;
1798
1799         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
1800         if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
1801                 asus->driver->wlan_ctrl_by_user = 1;
1802
1803         return 0;
1804
1805 fail_debugfs:
1806         wmi_remove_notify_handler(asus->driver->event_guid);
1807 fail_wmi_handler:
1808         asus_wmi_backlight_exit(asus);
1809 fail_backlight:
1810         asus_wmi_rfkill_exit(asus);
1811 fail_rfkill:
1812         asus_wmi_led_exit(asus);
1813 fail_leds:
1814 fail_hwmon:
1815         asus_wmi_input_exit(asus);
1816 fail_input:
1817         asus_wmi_platform_exit(asus);
1818 fail_platform:
1819         kfree(asus);
1820         return err;
1821 }
1822
1823 static int asus_wmi_remove(struct platform_device *device)
1824 {
1825         struct asus_wmi *asus;
1826
1827         asus = platform_get_drvdata(device);
1828         wmi_remove_notify_handler(asus->driver->event_guid);
1829         asus_wmi_backlight_exit(asus);
1830         asus_wmi_input_exit(asus);
1831         asus_wmi_led_exit(asus);
1832         asus_wmi_rfkill_exit(asus);
1833         asus_wmi_debugfs_exit(asus);
1834         asus_wmi_platform_exit(asus);
1835
1836         kfree(asus);
1837         return 0;
1838 }
1839
1840 /*
1841  * Platform driver - hibernate/resume callbacks
1842  */
1843 static int asus_hotk_thaw(struct device *device)
1844 {
1845         struct asus_wmi *asus = dev_get_drvdata(device);
1846
1847         if (asus->wlan.rfkill) {
1848                 bool wlan;
1849
1850                 /*
1851                  * Work around bios bug - acpi _PTS turns off the wireless led
1852                  * during suspend.  Normally it restores it on resume, but
1853                  * we should kick it ourselves in case hibernation is aborted.
1854                  */
1855                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1856                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1857         }
1858
1859         return 0;
1860 }
1861
1862 static int asus_hotk_restore(struct device *device)
1863 {
1864         struct asus_wmi *asus = dev_get_drvdata(device);
1865         int bl;
1866
1867         /* Refresh both wlan rfkill state and pci hotplug */
1868         if (asus->wlan.rfkill)
1869                 asus_rfkill_hotplug(asus);
1870
1871         if (asus->bluetooth.rfkill) {
1872                 bl = !asus_wmi_get_devstate_simple(asus,
1873                                                    ASUS_WMI_DEVID_BLUETOOTH);
1874                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1875         }
1876         if (asus->wimax.rfkill) {
1877                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1878                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1879         }
1880         if (asus->wwan3g.rfkill) {
1881                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1882                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1883         }
1884         if (asus->gps.rfkill) {
1885                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1886                 rfkill_set_sw_state(asus->gps.rfkill, bl);
1887         }
1888         if (asus->uwb.rfkill) {
1889                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1890                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1891         }
1892
1893         return 0;
1894 }
1895
1896 static const struct dev_pm_ops asus_pm_ops = {
1897         .thaw = asus_hotk_thaw,
1898         .restore = asus_hotk_restore,
1899 };
1900
1901 static int asus_wmi_probe(struct platform_device *pdev)
1902 {
1903         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1904         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1905         int ret;
1906
1907         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1908                 pr_warn("Management GUID not found\n");
1909                 return -ENODEV;
1910         }
1911
1912         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1913                 pr_warn("Event GUID not found\n");
1914                 return -ENODEV;
1915         }
1916
1917         if (wdrv->probe) {
1918                 ret = wdrv->probe(pdev);
1919                 if (ret)
1920                         return ret;
1921         }
1922
1923         return asus_wmi_add(pdev);
1924 }
1925
1926 static bool used;
1927
1928 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1929 {
1930         struct platform_driver *platform_driver;
1931         struct platform_device *platform_device;
1932
1933         if (used)
1934                 return -EBUSY;
1935
1936         platform_driver = &driver->platform_driver;
1937         platform_driver->remove = asus_wmi_remove;
1938         platform_driver->driver.owner = driver->owner;
1939         platform_driver->driver.name = driver->name;
1940         platform_driver->driver.pm = &asus_pm_ops;
1941
1942         platform_device = platform_create_bundle(platform_driver,
1943                                                  asus_wmi_probe,
1944                                                  NULL, 0, NULL, 0);
1945         if (IS_ERR(platform_device))
1946                 return PTR_ERR(platform_device);
1947
1948         used = true;
1949         return 0;
1950 }
1951 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1952
1953 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1954 {
1955         platform_device_unregister(driver->platform_device);
1956         platform_driver_unregister(&driver->platform_driver);
1957         used = false;
1958 }
1959 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1960
1961 static int __init asus_wmi_init(void)
1962 {
1963         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1964                 pr_info("Asus Management GUID not found\n");
1965                 return -ENODEV;
1966         }
1967
1968         pr_info("ASUS WMI generic driver loaded\n");
1969         return 0;
1970 }
1971
1972 static void __exit asus_wmi_exit(void)
1973 {
1974         pr_info("ASUS WMI generic driver unloaded\n");
1975 }
1976
1977 module_init(asus_wmi_init);
1978 module_exit(asus_wmi_exit);