Pileus Git - ~andy/linux/blob - drivers/platform/x86/asus-wmi.c

   1 /*
   2  * Asus PC WMI hotkey driver
   3  *
   4  * Copyright(C) 2010 Intel Corporation.
   5  * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/types.h>
  33 #include <linux/slab.h>
  34 #include <linux/input.h>
  35 #include <linux/input/sparse-keymap.h>
  36 #include <linux/fb.h>
  37 #include <linux/backlight.h>
  38 #include <linux/leds.h>
  39 #include <linux/rfkill.h>
  40 #include <linux/pci.h>
  41 #include <linux/pci_hotplug.h>
  42 #include <linux/hwmon.h>
  43 #include <linux/hwmon-sysfs.h>
  44 #include <linux/debugfs.h>
  45 #include <linux/seq_file.h>
  46 #include <linux/platform_device.h>
  47 #include <linux/thermal.h>
  48 #include <linux/acpi.h>
  49 #include <acpi/video.h>
  50
  51 #include "asus-wmi.h"
  52
  53 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
  54               "Yong Wang <yong.y.wang@intel.com>");
  55 MODULE_DESCRIPTION("Asus Generic WMI Driver");
  56 MODULE_LICENSE("GPL");
  57
  58 #define to_platform_driver(drv)                                 \
  59         (container_of((drv), struct platform_driver, driver))
  60
  61 #define to_asus_wmi_driver(pdrv)                                        \
  62         (container_of((pdrv), struct asus_wmi_driver, platform_driver))
  63
  64 #define ASUS_WMI_MGMT_GUID      "97845ED0-4E6D-11DE-8A39-0800200C9A66"
  65
  66 #define NOTIFY_BRNUP_MIN                0x11
  67 #define NOTIFY_BRNUP_MAX                0x1f
  68 #define NOTIFY_BRNDOWN_MIN              0x20
  69 #define NOTIFY_BRNDOWN_MAX              0x2e
  70 #define NOTIFY_KBD_BRTUP                0xc4
  71 #define NOTIFY_KBD_BRTDWN               0xc5
  72
  73 /* WMI Methods */
  74 #define ASUS_WMI_METHODID_SPEC          0x43455053 /* BIOS SPECification */
  75 #define ASUS_WMI_METHODID_SFBD          0x44424653 /* Set First Boot Device */
  76 #define ASUS_WMI_METHODID_GLCD          0x44434C47 /* Get LCD status */
  77 #define ASUS_WMI_METHODID_GPID          0x44495047 /* Get Panel ID?? (Resol) */
  78 #define ASUS_WMI_METHODID_QMOD          0x444F4D51 /* Quiet MODe */
  79 #define ASUS_WMI_METHODID_SPLV          0x4C425053 /* Set Panel Light Value */
  80 #define ASUS_WMI_METHODID_SFUN          0x4E554653 /* FUNCtionalities */
  81 #define ASUS_WMI_METHODID_SDSP          0x50534453 /* Set DiSPlay output */
  82 #define ASUS_WMI_METHODID_GDSP          0x50534447 /* Get DiSPlay output */
  83 #define ASUS_WMI_METHODID_DEVP          0x50564544 /* DEVice Policy */
  84 #define ASUS_WMI_METHODID_OSVR          0x5256534F /* OS VeRsion */
  85 #define ASUS_WMI_METHODID_DSTS          0x53544344 /* Device STatuS */
  86 #define ASUS_WMI_METHODID_DSTS2         0x53545344 /* Device STatuS #2*/
  87 #define ASUS_WMI_METHODID_BSTS          0x53545342 /* Bios STatuS ? */
  88 #define ASUS_WMI_METHODID_DEVS          0x53564544 /* DEVice Set */
  89 #define ASUS_WMI_METHODID_CFVS          0x53564643 /* CPU Frequency Volt Set */
  90 #define ASUS_WMI_METHODID_KBFT          0x5446424B /* KeyBoard FilTer */
  91 #define ASUS_WMI_METHODID_INIT          0x54494E49 /* INITialize */
  92 #define ASUS_WMI_METHODID_HKEY          0x59454B48 /* Hot KEY ?? */
  93
  94 #define ASUS_WMI_UNSUPPORTED_METHOD     0xFFFFFFFE
  95
  96 /* Wireless */
  97 #define ASUS_WMI_DEVID_HW_SWITCH        0x00010001
  98 #define ASUS_WMI_DEVID_WIRELESS_LED     0x00010002
  99 #define ASUS_WMI_DEVID_CWAP             0x00010003
 100 #define ASUS_WMI_DEVID_WLAN             0x00010011
 101 #define ASUS_WMI_DEVID_WLAN_LED         0x00010012
 102 #define ASUS_WMI_DEVID_BLUETOOTH        0x00010013
 103 #define ASUS_WMI_DEVID_GPS              0x00010015
 104 #define ASUS_WMI_DEVID_WIMAX            0x00010017
 105 #define ASUS_WMI_DEVID_WWAN3G           0x00010019
 106 #define ASUS_WMI_DEVID_UWB              0x00010021
 107
 108 /* Leds */
 109 /* 0x000200XX and 0x000400XX */
 110 #define ASUS_WMI_DEVID_LED1             0x00020011
 111 #define ASUS_WMI_DEVID_LED2             0x00020012
 112 #define ASUS_WMI_DEVID_LED3             0x00020013
 113 #define ASUS_WMI_DEVID_LED4             0x00020014
 114 #define ASUS_WMI_DEVID_LED5             0x00020015
 115 #define ASUS_WMI_DEVID_LED6             0x00020016
 116
 117 /* Backlight and Brightness */
 118 #define ASUS_WMI_DEVID_BACKLIGHT        0x00050011
 119 #define ASUS_WMI_DEVID_BRIGHTNESS       0x00050012
 120 #define ASUS_WMI_DEVID_KBD_BACKLIGHT    0x00050021
 121 #define ASUS_WMI_DEVID_LIGHT_SENSOR     0x00050022 /* ?? */
 122
 123 /* Misc */
 124 #define ASUS_WMI_DEVID_CAMERA           0x00060013
 125
 126 /* Storage */
 127 #define ASUS_WMI_DEVID_CARDREADER       0x00080013
 128
 129 /* Input */
 130 #define ASUS_WMI_DEVID_TOUCHPAD         0x00100011
 131 #define ASUS_WMI_DEVID_TOUCHPAD_LED     0x00100012
 132
 133 /* Fan, Thermal */
 134 #define ASUS_WMI_DEVID_THERMAL_CTRL     0x00110011
 135 #define ASUS_WMI_DEVID_FAN_CTRL         0x00110012
 136
 137 /* Power */
 138 #define ASUS_WMI_DEVID_PROCESSOR_STATE  0x00120012
 139
 140 /* Deep S3 / Resume on LID open */
 141 #define ASUS_WMI_DEVID_LID_RESUME       0x00120031
 142
 143 /* DSTS masks */
 144 #define ASUS_WMI_DSTS_STATUS_BIT        0x00000001
 145 #define ASUS_WMI_DSTS_UNKNOWN_BIT       0x00000002
 146 #define ASUS_WMI_DSTS_PRESENCE_BIT      0x00010000
 147 #define ASUS_WMI_DSTS_USER_BIT          0x00020000
 148 #define ASUS_WMI_DSTS_BIOS_BIT          0x00040000
 149 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK   0x000000FF
 150 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK   0x0000FF00
 151
 152 struct bios_args {
 153         u32 arg0;
 154         u32 arg1;
 155 } __packed;
 156
 157 /*
 158  * <platform>/    - debugfs root directory
 159  *   dev_id      - current dev_id
 160  *   ctrl_param  - current ctrl_param
 161  *   method_id   - current method_id
 162  *   devs        - call DEVS(dev_id, ctrl_param) and print result
 163  *   dsts        - call DSTS(dev_id)  and print result
 164  *   call        - call method_id(dev_id, ctrl_param) and print result
 165  */
 166 struct asus_wmi_debug {
 167         struct dentry *root;
 168         u32 method_id;
 169         u32 dev_id;
 170         u32 ctrl_param;
 171 };
 172
 173 struct asus_rfkill {
 174         struct asus_wmi *asus;
 175         struct rfkill *rfkill;
 176         u32 dev_id;
 177 };
 178
 179 struct asus_wmi {
 180         int dsts_id;
 181         int spec;
 182         int sfun;
 183
 184         struct input_dev *inputdev;
 185         struct backlight_device *backlight_device;
 186         struct platform_device *platform_device;
 187
 188         struct led_classdev wlan_led;
 189         int wlan_led_wk;
 190         struct led_classdev tpd_led;
 191         int tpd_led_wk;
 192         struct led_classdev kbd_led;
 193         int kbd_led_wk;
 194         struct workqueue_struct *led_workqueue;
 195         struct work_struct tpd_led_work;
 196         struct work_struct kbd_led_work;
 197         struct work_struct wlan_led_work;
 198
 199         struct asus_rfkill wlan;
 200         struct asus_rfkill bluetooth;
 201         struct asus_rfkill wimax;
 202         struct asus_rfkill wwan3g;
 203         struct asus_rfkill gps;
 204         struct asus_rfkill uwb;
 205
 206         struct hotplug_slot *hotplug_slot;
 207         struct mutex hotplug_lock;
 208         struct mutex wmi_lock;
 209         struct workqueue_struct *hotplug_workqueue;
 210         struct work_struct hotplug_work;
 211
 212         struct asus_wmi_debug debug;
 213
 214         struct asus_wmi_driver *driver;
 215 };
 216
 217 static int asus_wmi_input_init(struct asus_wmi *asus)
 218 {
 219         int err;
 220
 221         asus->inputdev = input_allocate_device();
 222         if (!asus->inputdev)
 223                 return -ENOMEM;
 224
 225         asus->inputdev->name = asus->driver->input_name;
 226         asus->inputdev->phys = asus->driver->input_phys;
 227         asus->inputdev->id.bustype = BUS_HOST;
 228         asus->inputdev->dev.parent = &asus->platform_device->dev;
 229         set_bit(EV_REP, asus->inputdev->evbit);
 230
 231         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
 232         if (err)
 233                 goto err_free_dev;
 234
 235         err = input_register_device(asus->inputdev);
 236         if (err)
 237                 goto err_free_keymap;
 238
 239         return 0;
 240
 241 err_free_keymap:
 242         sparse_keymap_free(asus->inputdev);
 243 err_free_dev:
 244         input_free_device(asus->inputdev);
 245         return err;
 246 }
 247
 248 static void asus_wmi_input_exit(struct asus_wmi *asus)
 249 {
 250         if (asus->inputdev) {
 251                 sparse_keymap_free(asus->inputdev);
 252                 input_unregister_device(asus->inputdev);
 253         }
 254
 255         asus->inputdev = NULL;
 256 }
 257
 258 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 259                                     u32 *retval)
 260 {
 261         struct bios_args args = {
 262                 .arg0 = arg0,
 263                 .arg1 = arg1,
 264         };
 265         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
 266         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 267         acpi_status status;
 268         union acpi_object *obj;
 269         u32 tmp;
 270
 271         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
 272                                      &input, &output);
 273
 274         if (ACPI_FAILURE(status))
 275                 goto exit;
 276
 277         obj = (union acpi_object *)output.pointer;
 278         if (obj && obj->type == ACPI_TYPE_INTEGER)
 279                 tmp = (u32) obj->integer.value;
 280         else
 281                 tmp = 0;
 282
 283         if (retval)
 284                 *retval = tmp;
 285
 286         kfree(obj);
 287
 288 exit:
 289         if (ACPI_FAILURE(status))
 290                 return -EIO;
 291
 292         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
 293                 return -ENODEV;
 294
 295         return 0;
 296 }
 297
 298 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 299 {
 300         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
 301 }
 302
 303 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 304                                  u32 *retval)
 305 {
 306         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 307                                         ctrl_param, retval);
 308 }
 309
 310 /* Helper for special devices with magic return codes */
 311 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
 312                                       u32 dev_id, u32 mask)
 313 {
 314         u32 retval = 0;
 315         int err;
 316
 317         err = asus_wmi_get_devstate(asus, dev_id, &retval);
 318
 319         if (err < 0)
 320                 return err;
 321
 322         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
 323                 return -ENODEV;
 324
 325         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
 326                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
 327                         return -ENODEV;
 328         }
 329
 330         return retval & mask;
 331 }
 332
 333 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
 334 {
 335         return asus_wmi_get_devstate_bits(asus, dev_id,
 336                                           ASUS_WMI_DSTS_STATUS_BIT);
 337 }
 338
 339 /*
 340  * LEDs
 341  */
 342 /*
 343  * These functions actually update the LED's, and are called from a
 344  * workqueue. By doing this as separate work rather than when the LED
 345  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 346  * potentially bad time, such as a timer interrupt.
 347  */
 348 static void tpd_led_update(struct work_struct *work)
 349 {
 350         int ctrl_param;
 351         struct asus_wmi *asus;
 352
 353         asus = container_of(work, struct asus_wmi, tpd_led_work);
 354
 355         ctrl_param = asus->tpd_led_wk;
 356         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
 357 }
 358
 359 static void tpd_led_set(struct led_classdev *led_cdev,
 360                         enum led_brightness value)
 361 {
 362         struct asus_wmi *asus;
 363
 364         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 365
 366         asus->tpd_led_wk = !!value;
 367         queue_work(asus->led_workqueue, &asus->tpd_led_work);
 368 }
 369
 370 static int read_tpd_led_state(struct asus_wmi *asus)
 371 {
 372         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
 373 }
 374
 375 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 376 {
 377         struct asus_wmi *asus;
 378
 379         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 380
 381         return read_tpd_led_state(asus);
 382 }
 383
 384 static void kbd_led_update(struct work_struct *work)
 385 {
 386         int ctrl_param = 0;
 387         struct asus_wmi *asus;
 388
 389         asus = container_of(work, struct asus_wmi, kbd_led_work);
 390
 391         /*
 392          * bits 0-2: level
 393          * bit 7: light on/off
 394          */
 395         if (asus->kbd_led_wk > 0)
 396                 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
 397
 398         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
 399 }
 400
 401 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 402 {
 403         int retval;
 404
 405         /*
 406          * bits 0-2: level
 407          * bit 7: light on/off
 408          * bit 8-10: environment (0: dark, 1: normal, 2: light)
 409          * bit 17: status unknown
 410          */
 411         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
 412                                             0xFFFF);
 413
 414         /* Unknown status is considered as off */
 415         if (retval == 0x8000)
 416                 retval = 0;
 417
 418         if (retval >= 0) {
 419                 if (level)
 420                         *level = retval & 0x7F;
 421                 if (env)
 422                         *env = (retval >> 8) & 0x7F;
 423                 retval = 0;
 424         }
 425
 426         return retval;
 427 }
 428
 429 static void kbd_led_set(struct led_classdev *led_cdev,
 430                         enum led_brightness value)
 431 {
 432         struct asus_wmi *asus;
 433
 434         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 435
 436         if (value > asus->kbd_led.max_brightness)
 437                 value = asus->kbd_led.max_brightness;
 438         else if (value < 0)
 439                 value = 0;
 440
 441         asus->kbd_led_wk = value;
 442         queue_work(asus->led_workqueue, &asus->kbd_led_work);
 443 }
 444
 445 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
 446 {
 447         struct asus_wmi *asus;
 448         int retval, value;
 449
 450         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 451
 452         retval = kbd_led_read(asus, &value, NULL);
 453
 454         if (retval < 0)
 455                 return retval;
 456
 457         return value;
 458 }
 459
 460 static int wlan_led_unknown_state(struct asus_wmi *asus)
 461 {
 462         u32 result;
 463
 464         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 465
 466         return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
 467 }
 468
 469 static int wlan_led_presence(struct asus_wmi *asus)
 470 {
 471         u32 result;
 472
 473         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 474
 475         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
 476 }
 477
 478 static void wlan_led_update(struct work_struct *work)
 479 {
 480         int ctrl_param;
 481         struct asus_wmi *asus;
 482
 483         asus = container_of(work, struct asus_wmi, wlan_led_work);
 484
 485         ctrl_param = asus->wlan_led_wk;
 486         asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
 487 }
 488
 489 static void wlan_led_set(struct led_classdev *led_cdev,
 490                          enum led_brightness value)
 491 {
 492         struct asus_wmi *asus;
 493
 494         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 495
 496         asus->wlan_led_wk = !!value;
 497         queue_work(asus->led_workqueue, &asus->wlan_led_work);
 498 }
 499
 500 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
 501 {
 502         struct asus_wmi *asus;
 503         u32 result;
 504
 505         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 506         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 507
 508         return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
 509 }
 510
 511 static void asus_wmi_led_exit(struct asus_wmi *asus)
 512 {
 513         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
 514                 led_classdev_unregister(&asus->kbd_led);
 515         if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
 516                 led_classdev_unregister(&asus->tpd_led);
 517         if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
 518                 led_classdev_unregister(&asus->wlan_led);
 519         if (asus->led_workqueue)
 520                 destroy_workqueue(asus->led_workqueue);
 521 }
 522
 523 static int asus_wmi_led_init(struct asus_wmi *asus)
 524 {
 525         int rv = 0;
 526
 527         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 528         if (!asus->led_workqueue)
 529                 return -ENOMEM;
 530
 531         if (read_tpd_led_state(asus) >= 0) {
 532                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 533
 534                 asus->tpd_led.name = "asus::touchpad";
 535                 asus->tpd_led.brightness_set = tpd_led_set;
 536                 asus->tpd_led.brightness_get = tpd_led_get;
 537                 asus->tpd_led.max_brightness = 1;
 538
 539                 rv = led_classdev_register(&asus->platform_device->dev,
 540                                            &asus->tpd_led);
 541                 if (rv)
 542                         goto error;
 543         }
 544
 545         if (kbd_led_read(asus, NULL, NULL) >= 0) {
 546                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
 547
 548                 asus->kbd_led.name = "asus::kbd_backlight";
 549                 asus->kbd_led.brightness_set = kbd_led_set;
 550                 asus->kbd_led.brightness_get = kbd_led_get;
 551                 asus->kbd_led.max_brightness = 3;
 552
 553                 rv = led_classdev_register(&asus->platform_device->dev,
 554                                            &asus->kbd_led);
 555                 if (rv)
 556                         goto error;
 557         }
 558
 559         if (wlan_led_presence(asus) && (asus->driver->quirks->wapf == 4)) {
 560                 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
 561
 562                 asus->wlan_led.name = "asus::wlan";
 563                 asus->wlan_led.brightness_set = wlan_led_set;
 564                 if (!wlan_led_unknown_state(asus))
 565                         asus->wlan_led.brightness_get = wlan_led_get;
 566                 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
 567                 asus->wlan_led.max_brightness = 1;
 568                 asus->wlan_led.default_trigger = "asus-wlan";
 569
 570                 rv = led_classdev_register(&asus->platform_device->dev,
 571                                            &asus->wlan_led);
 572         }
 573
 574 error:
 575         if (rv)
 576                 asus_wmi_led_exit(asus);
 577
 578         return rv;
 579 }
 580
 581
 582 /*
 583  * PCI hotplug (for wlan rfkill)
 584  */
 585 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 586 {
 587         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 588
 589         if (result < 0)
 590                 return false;
 591         return !result;
 592 }
 593
 594 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 595 {
 596         struct pci_dev *dev;
 597         struct pci_bus *bus;
 598         bool blocked;
 599         bool absent;
 600         u32 l;
 601
 602         mutex_lock(&asus->wmi_lock);
 603         blocked = asus_wlan_rfkill_blocked(asus);
 604         mutex_unlock(&asus->wmi_lock);
 605
 606         mutex_lock(&asus->hotplug_lock);
 607         pci_lock_rescan_remove();
 608
 609         if (asus->wlan.rfkill)
 610                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 611
 612         if (asus->hotplug_slot) {
 613                 bus = pci_find_bus(0, 1);
 614                 if (!bus) {
 615                         pr_warn("Unable to find PCI bus 1?\n");
 616                         goto out_unlock;
 617                 }
 618
 619                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 620                         pr_err("Unable to read PCI config space?\n");
 621                         goto out_unlock;
 622                 }
 623                 absent = (l == 0xffffffff);
 624
 625                 if (blocked != absent) {
 626                         pr_warn("BIOS says wireless lan is %s, "
 627                                 "but the pci device is %s\n",
 628                                 blocked ? "blocked" : "unblocked",
 629                                 absent ? "absent" : "present");
 630                         pr_warn("skipped wireless hotplug as probably "
 631                                 "inappropriate for this model\n");
 632                         goto out_unlock;
 633                 }
 634
 635                 if (!blocked) {
 636                         dev = pci_get_slot(bus, 0);
 637                         if (dev) {
 638                                 /* Device already present */
 639                                 pci_dev_put(dev);
 640                                 goto out_unlock;
 641                         }
 642                         dev = pci_scan_single_device(bus, 0);
 643                         if (dev) {
 644                                 pci_bus_assign_resources(bus);
 645                                 if (pci_bus_add_device(dev))
 646                                         pr_err("Unable to hotplug wifi\n");
 647                         }
 648                 } else {
 649                         dev = pci_get_slot(bus, 0);
 650                         if (dev) {
 651                                 pci_stop_and_remove_bus_device(dev);
 652                                 pci_dev_put(dev);
 653                         }
 654                 }
 655         }
 656
 657 out_unlock:
 658         pci_unlock_rescan_remove();
 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 DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL);
1075 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1076
1077 static struct attribute *hwmon_attributes[] = {
1078         &dev_attr_pwm1.attr,
1079         &dev_attr_temp1_input.attr,
1080         NULL
1081 };
1082
1083 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1084                                           struct attribute *attr, int idx)
1085 {
1086         struct device *dev = container_of(kobj, struct device, kobj);
1087         struct platform_device *pdev = to_platform_device(dev->parent);
1088         struct asus_wmi *asus = platform_get_drvdata(pdev);
1089         bool ok = true;
1090         int dev_id = -1;
1091         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1092
1093         if (attr == &dev_attr_pwm1.attr)
1094                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1095         else if (attr == &dev_attr_temp1_input.attr)
1096                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1097
1098         if (dev_id != -1) {
1099                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1100
1101                 if (err < 0)
1102                         return 0; /* can't return negative here */
1103         }
1104
1105         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1106                 /*
1107                  * We need to find a better way, probably using sfun,
1108                  * bits or spec ...
1109                  * Currently we disable it if:
1110                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1111                  * - reverved bits are non-zero
1112                  * - sfun and presence bit are not set
1113                  */
1114                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1115                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1116                         ok = false;
1117         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1118                 /* If value is zero, something is clearly wrong */
1119                 if (value == 0)
1120                         ok = false;
1121         }
1122
1123         return ok ? attr->mode : 0;
1124 }
1125
1126 static struct attribute_group hwmon_attribute_group = {
1127         .is_visible = asus_hwmon_sysfs_is_visible,
1128         .attrs = hwmon_attributes
1129 };
1130 __ATTRIBUTE_GROUPS(hwmon_attribute);
1131
1132 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1133 {
1134         struct device *hwmon;
1135
1136         hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1137                                                   "asus", asus,
1138                                                   hwmon_attribute_groups);
1139         if (IS_ERR(hwmon)) {
1140                 pr_err("Could not register asus hwmon device\n");
1141                 return PTR_ERR(hwmon);
1142         }
1143         return 0;
1144 }
1145
1146 /*
1147  * Backlight
1148  */
1149 static int read_backlight_power(struct asus_wmi *asus)
1150 {
1151         int ret;
1152         if (asus->driver->quirks->store_backlight_power)
1153                 ret = !asus->driver->panel_power;
1154         else
1155                 ret = asus_wmi_get_devstate_simple(asus,
1156                                                    ASUS_WMI_DEVID_BACKLIGHT);
1157
1158         if (ret < 0)
1159                 return ret;
1160
1161         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1162 }
1163
1164 static int read_brightness_max(struct asus_wmi *asus)
1165 {
1166         u32 retval;
1167         int err;
1168
1169         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1170
1171         if (err < 0)
1172                 return err;
1173
1174         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1175         retval >>= 8;
1176
1177         if (!retval)
1178                 return -ENODEV;
1179
1180         return retval;
1181 }
1182
1183 static int read_brightness(struct backlight_device *bd)
1184 {
1185         struct asus_wmi *asus = bl_get_data(bd);
1186         u32 retval;
1187         int err;
1188
1189         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1190
1191         if (err < 0)
1192                 return err;
1193
1194         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1195 }
1196
1197 static u32 get_scalar_command(struct backlight_device *bd)
1198 {
1199         struct asus_wmi *asus = bl_get_data(bd);
1200         u32 ctrl_param = 0;
1201
1202         if ((asus->driver->brightness < bd->props.brightness) ||
1203             bd->props.brightness == bd->props.max_brightness)
1204                 ctrl_param = 0x00008001;
1205         else if ((asus->driver->brightness > bd->props.brightness) ||
1206                  bd->props.brightness == 0)
1207                 ctrl_param = 0x00008000;
1208
1209         asus->driver->brightness = bd->props.brightness;
1210
1211         return ctrl_param;
1212 }
1213
1214 static int update_bl_status(struct backlight_device *bd)
1215 {
1216         struct asus_wmi *asus = bl_get_data(bd);
1217         u32 ctrl_param;
1218         int power, err = 0;
1219
1220         power = read_backlight_power(asus);
1221         if (power != -ENODEV && bd->props.power != power) {
1222                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1223                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1224                                             ctrl_param, NULL);
1225                 if (asus->driver->quirks->store_backlight_power)
1226                         asus->driver->panel_power = bd->props.power;
1227
1228                 /* When using scalar brightness, updating the brightness
1229                  * will mess with the backlight power */
1230                 if (asus->driver->quirks->scalar_panel_brightness)
1231                         return err;
1232         }
1233
1234         if (asus->driver->quirks->scalar_panel_brightness)
1235                 ctrl_param = get_scalar_command(bd);
1236         else
1237                 ctrl_param = bd->props.brightness;
1238
1239         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1240                                     ctrl_param, NULL);
1241
1242         return err;
1243 }
1244
1245 static const struct backlight_ops asus_wmi_bl_ops = {
1246         .get_brightness = read_brightness,
1247         .update_status = update_bl_status,
1248 };
1249
1250 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1251 {
1252         struct backlight_device *bd = asus->backlight_device;
1253         int old = bd->props.brightness;
1254         int new = old;
1255
1256         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1257                 new = code - NOTIFY_BRNUP_MIN + 1;
1258         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1259                 new = code - NOTIFY_BRNDOWN_MIN;
1260
1261         bd->props.brightness = new;
1262         backlight_update_status(bd);
1263         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1264
1265         return old;
1266 }
1267
1268 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1269 {
1270         struct backlight_device *bd;
1271         struct backlight_properties props;
1272         int max;
1273         int power;
1274
1275         max = read_brightness_max(asus);
1276
1277         if (max == -ENODEV)
1278                 max = 0;
1279         else if (max < 0)
1280                 return max;
1281
1282         power = read_backlight_power(asus);
1283
1284         if (power == -ENODEV)
1285                 power = FB_BLANK_UNBLANK;
1286         else if (power < 0)
1287                 return power;
1288
1289         memset(&props, 0, sizeof(struct backlight_properties));
1290         props.type = BACKLIGHT_PLATFORM;
1291         props.max_brightness = max;
1292         bd = backlight_device_register(asus->driver->name,
1293                                        &asus->platform_device->dev, asus,
1294                                        &asus_wmi_bl_ops, &props);
1295         if (IS_ERR(bd)) {
1296                 pr_err("Could not register backlight device\n");
1297                 return PTR_ERR(bd);
1298         }
1299
1300         asus->backlight_device = bd;
1301
1302         if (asus->driver->quirks->store_backlight_power)
1303                 asus->driver->panel_power = power;
1304
1305         bd->props.brightness = read_brightness(bd);
1306         bd->props.power = power;
1307         backlight_update_status(bd);
1308
1309         asus->driver->brightness = bd->props.brightness;
1310
1311         return 0;
1312 }
1313
1314 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1315 {
1316         if (asus->backlight_device)
1317                 backlight_device_unregister(asus->backlight_device);
1318
1319         asus->backlight_device = NULL;
1320 }
1321
1322 static int is_display_toggle(int code)
1323 {
1324         /* display toggle keys */
1325         if ((code >= 0x61 && code <= 0x67) ||
1326             (code >= 0x8c && code <= 0x93) ||
1327             (code >= 0xa0 && code <= 0xa7) ||
1328             (code >= 0xd0 && code <= 0xd5))
1329                 return 1;
1330
1331         return 0;
1332 }
1333
1334 static void asus_wmi_notify(u32 value, void *context)
1335 {
1336         struct asus_wmi *asus = context;
1337         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1338         union acpi_object *obj;
1339         acpi_status status;
1340         int code;
1341         int orig_code;
1342         unsigned int key_value = 1;
1343         bool autorelease = 1;
1344
1345         status = wmi_get_event_data(value, &response);
1346         if (status != AE_OK) {
1347                 pr_err("bad event status 0x%x\n", status);
1348                 return;
1349         }
1350
1351         obj = (union acpi_object *)response.pointer;
1352
1353         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1354                 goto exit;
1355
1356         code = obj->integer.value;
1357         orig_code = code;
1358
1359         if (asus->driver->key_filter) {
1360                 asus->driver->key_filter(asus->driver, &code, &key_value,
1361                                          &autorelease);
1362                 if (code == ASUS_WMI_KEY_IGNORE)
1363                         goto exit;
1364         }
1365
1366         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1367                 code = ASUS_WMI_BRN_UP;
1368         else if (code >= NOTIFY_BRNDOWN_MIN &&
1369                  code <= NOTIFY_BRNDOWN_MAX)
1370                 code = ASUS_WMI_BRN_DOWN;
1371
1372         if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1373                 if (!acpi_video_backlight_support()) {
1374                         asus_wmi_backlight_notify(asus, orig_code);
1375                         goto exit;
1376                 }
1377         }
1378
1379         if (is_display_toggle(code) &&
1380             asus->driver->quirks->no_display_toggle)
1381                 goto exit;
1382
1383         if (!sparse_keymap_report_event(asus->inputdev, code,
1384                                         key_value, autorelease))
1385                 pr_info("Unknown key %x pressed\n", code);
1386
1387 exit:
1388         kfree(obj);
1389 }
1390
1391 /*
1392  * Sys helpers
1393  */
1394 static int parse_arg(const char *buf, unsigned long count, int *val)
1395 {
1396         if (!count)
1397                 return 0;
1398         if (sscanf(buf, "%i", val) != 1)
1399                 return -EINVAL;
1400         return count;
1401 }
1402
1403 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1404                              const char *buf, size_t count)
1405 {
1406         u32 retval;
1407         int rv, err, value;
1408
1409         value = asus_wmi_get_devstate_simple(asus, devid);
1410         if (value == -ENODEV)   /* Check device presence */
1411                 return value;
1412
1413         rv = parse_arg(buf, count, &value);
1414         err = asus_wmi_set_devstate(devid, value, &retval);
1415
1416         if (err < 0)
1417                 return err;
1418
1419         return rv;
1420 }
1421
1422 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1423 {
1424         int value = asus_wmi_get_devstate_simple(asus, devid);
1425
1426         if (value < 0)
1427                 return value;
1428
1429         return sprintf(buf, "%d\n", value);
1430 }
1431
1432 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1433         static ssize_t show_##_name(struct device *dev,                 \
1434                                     struct device_attribute *attr,      \
1435                                     char *buf)                          \
1436         {                                                               \
1437                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1438                                                                         \
1439                 return show_sys_wmi(asus, _cm, buf);                    \
1440         }                                                               \
1441         static ssize_t store_##_name(struct device *dev,                \
1442                                      struct device_attribute *attr,     \
1443                                      const char *buf, size_t count)     \
1444         {                                                               \
1445                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1446                                                                         \
1447                 return store_sys_wmi(asus, _cm, buf, count);            \
1448         }                                                               \
1449         static struct device_attribute dev_attr_##_name = {             \
1450                 .attr = {                                               \
1451                         .name = __stringify(_name),                     \
1452                         .mode = _mode },                                \
1453                 .show   = show_##_name,                                 \
1454                 .store  = store_##_name,                                \
1455         }
1456
1457 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1458 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1459 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1460 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1461
1462 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1463                            const char *buf, size_t count)
1464 {
1465         int value, rv;
1466
1467         if (!count || sscanf(buf, "%i", &value) != 1)
1468                 return -EINVAL;
1469         if (value < 0 || value > 2)
1470                 return -EINVAL;
1471
1472         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1473         if (rv < 0)
1474                 return rv;
1475
1476         return count;
1477 }
1478
1479 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1480
1481 static struct attribute *platform_attributes[] = {
1482         &dev_attr_cpufv.attr,
1483         &dev_attr_camera.attr,
1484         &dev_attr_cardr.attr,
1485         &dev_attr_touchpad.attr,
1486         &dev_attr_lid_resume.attr,
1487         NULL
1488 };
1489
1490 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1491                                     struct attribute *attr, int idx)
1492 {
1493         struct device *dev = container_of(kobj, struct device, kobj);
1494         struct platform_device *pdev = to_platform_device(dev);
1495         struct asus_wmi *asus = platform_get_drvdata(pdev);
1496         bool ok = true;
1497         int devid = -1;
1498
1499         if (attr == &dev_attr_camera.attr)
1500                 devid = ASUS_WMI_DEVID_CAMERA;
1501         else if (attr == &dev_attr_cardr.attr)
1502                 devid = ASUS_WMI_DEVID_CARDREADER;
1503         else if (attr == &dev_attr_touchpad.attr)
1504                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1505         else if (attr == &dev_attr_lid_resume.attr)
1506                 devid = ASUS_WMI_DEVID_LID_RESUME;
1507
1508         if (devid != -1)
1509                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1510
1511         return ok ? attr->mode : 0;
1512 }
1513
1514 static struct attribute_group platform_attribute_group = {
1515         .is_visible = asus_sysfs_is_visible,
1516         .attrs = platform_attributes
1517 };
1518
1519 static void asus_wmi_sysfs_exit(struct platform_device *device)
1520 {
1521         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1522 }
1523
1524 static int asus_wmi_sysfs_init(struct platform_device *device)
1525 {
1526         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1527 }
1528
1529 /*
1530  * Platform device
1531  */
1532 static int asus_wmi_platform_init(struct asus_wmi *asus)
1533 {
1534         int rv;
1535
1536         /* INIT enable hotkeys on some models */
1537         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1538                 pr_info("Initialization: %#x\n", rv);
1539
1540         /* We don't know yet what to do with this version... */
1541         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1542                 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1543                 asus->spec = rv;
1544         }
1545
1546         /*
1547          * The SFUN method probably allows the original driver to get the list
1548          * of features supported by a given model. For now, 0x0100 or 0x0800
1549          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1550          * The significance of others is yet to be found.
1551          */
1552         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1553                 pr_info("SFUN value: %#x\n", rv);
1554                 asus->sfun = rv;
1555         }
1556
1557         /*
1558          * Eee PC and Notebooks seems to have different method_id for DSTS,
1559          * but it may also be related to the BIOS's SPEC.
1560          * Note, on most Eeepc, there is no way to check if a method exist
1561          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1562          * but once again, SPEC may probably be used for that kind of things.
1563          */
1564         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1565                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1566         else
1567                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1568
1569         /* CWAP allow to define the behavior of the Fn+F2 key,
1570          * this method doesn't seems to be present on Eee PCs */
1571         if (asus->driver->quirks->wapf >= 0)
1572                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1573                                       asus->driver->quirks->wapf, NULL);
1574
1575         return asus_wmi_sysfs_init(asus->platform_device);
1576 }
1577
1578 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1579 {
1580         asus_wmi_sysfs_exit(asus->platform_device);
1581 }
1582
1583 /*
1584  * debugfs
1585  */
1586 struct asus_wmi_debugfs_node {
1587         struct asus_wmi *asus;
1588         char *name;
1589         int (*show) (struct seq_file *m, void *data);
1590 };
1591
1592 static int show_dsts(struct seq_file *m, void *data)
1593 {
1594         struct asus_wmi *asus = m->private;
1595         int err;
1596         u32 retval = -1;
1597
1598         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1599
1600         if (err < 0)
1601                 return err;
1602
1603         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1604
1605         return 0;
1606 }
1607
1608 static int show_devs(struct seq_file *m, void *data)
1609 {
1610         struct asus_wmi *asus = m->private;
1611         int err;
1612         u32 retval = -1;
1613
1614         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1615                                     &retval);
1616
1617         if (err < 0)
1618                 return err;
1619
1620         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1621                    asus->debug.ctrl_param, retval);
1622
1623         return 0;
1624 }
1625
1626 static int show_call(struct seq_file *m, void *data)
1627 {
1628         struct asus_wmi *asus = m->private;
1629         struct bios_args args = {
1630                 .arg0 = asus->debug.dev_id,
1631                 .arg1 = asus->debug.ctrl_param,
1632         };
1633         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1634         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1635         union acpi_object *obj;
1636         acpi_status status;
1637
1638         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1639                                      1, asus->debug.method_id,
1640                                      &input, &output);
1641
1642         if (ACPI_FAILURE(status))
1643                 return -EIO;
1644
1645         obj = (union acpi_object *)output.pointer;
1646         if (obj && obj->type == ACPI_TYPE_INTEGER)
1647                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1648                            asus->debug.dev_id, asus->debug.ctrl_param,
1649                            (u32) obj->integer.value);
1650         else
1651                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1652                            asus->debug.dev_id, asus->debug.ctrl_param,
1653                            obj ? obj->type : -1);
1654
1655         kfree(obj);
1656
1657         return 0;
1658 }
1659
1660 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1661         {NULL, "devs", show_devs},
1662         {NULL, "dsts", show_dsts},
1663         {NULL, "call", show_call},
1664 };
1665
1666 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1667 {
1668         struct asus_wmi_debugfs_node *node = inode->i_private;
1669
1670         return single_open(file, node->show, node->asus);
1671 }
1672
1673 static const struct file_operations asus_wmi_debugfs_io_ops = {
1674         .owner = THIS_MODULE,
1675         .open = asus_wmi_debugfs_open,
1676         .read = seq_read,
1677         .llseek = seq_lseek,
1678         .release = single_release,
1679 };
1680
1681 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1682 {
1683         debugfs_remove_recursive(asus->debug.root);
1684 }
1685
1686 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1687 {
1688         struct dentry *dent;
1689         int i;
1690
1691         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1692         if (!asus->debug.root) {
1693                 pr_err("failed to create debugfs directory\n");
1694                 goto error_debugfs;
1695         }
1696
1697         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1698                                   asus->debug.root, &asus->debug.method_id);
1699         if (!dent)
1700                 goto error_debugfs;
1701
1702         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1703                                   asus->debug.root, &asus->debug.dev_id);
1704         if (!dent)
1705                 goto error_debugfs;
1706
1707         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1708                                   asus->debug.root, &asus->debug.ctrl_param);
1709         if (!dent)
1710                 goto error_debugfs;
1711
1712         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1713                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1714
1715                 node->asus = asus;
1716                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1717                                            asus->debug.root, node,
1718                                            &asus_wmi_debugfs_io_ops);
1719                 if (!dent) {
1720                         pr_err("failed to create debug file: %s\n", node->name);
1721                         goto error_debugfs;
1722                 }
1723         }
1724
1725         return 0;
1726
1727 error_debugfs:
1728         asus_wmi_debugfs_exit(asus);
1729         return -ENOMEM;
1730 }
1731
1732 /*
1733  * WMI Driver
1734  */
1735 static int asus_wmi_add(struct platform_device *pdev)
1736 {
1737         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1738         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1739         struct asus_wmi *asus;
1740         acpi_status status;
1741         int err;
1742         u32 result;
1743
1744         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1745         if (!asus)
1746                 return -ENOMEM;
1747
1748         asus->driver = wdrv;
1749         asus->platform_device = pdev;
1750         wdrv->platform_device = pdev;
1751         platform_set_drvdata(asus->platform_device, asus);
1752
1753         if (wdrv->detect_quirks)
1754                 wdrv->detect_quirks(asus->driver);
1755
1756         err = asus_wmi_platform_init(asus);
1757         if (err)
1758                 goto fail_platform;
1759
1760         err = asus_wmi_input_init(asus);
1761         if (err)
1762                 goto fail_input;
1763
1764         err = asus_wmi_hwmon_init(asus);
1765         if (err)
1766                 goto fail_hwmon;
1767
1768         err = asus_wmi_led_init(asus);
1769         if (err)
1770                 goto fail_leds;
1771
1772         err = asus_wmi_rfkill_init(asus);
1773         if (err)
1774                 goto fail_rfkill;
1775
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();
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);