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_asus_wmi_driver(pdrv)                                        \
  60         (container_of((pdrv), struct asus_wmi_driver, platform_driver))
  61
  62 #define ASUS_WMI_MGMT_GUID      "97845ED0-4E6D-11DE-8A39-0800200C9A66"
  63
  64 #define NOTIFY_BRNUP_MIN                0x11
  65 #define NOTIFY_BRNUP_MAX                0x1f
  66 #define NOTIFY_BRNDOWN_MIN              0x20
  67 #define NOTIFY_BRNDOWN_MAX              0x2e
  68 #define NOTIFY_KBD_BRTUP                0xc4
  69 #define NOTIFY_KBD_BRTDWN               0xc5
  70 #define NOTIFY_KBD_BRTTOGGLE            0xc7
  71
  72 /* WMI Methods */
  73 #define ASUS_WMI_METHODID_SPEC          0x43455053 /* BIOS SPECification */
  74 #define ASUS_WMI_METHODID_SFBD          0x44424653 /* Set First Boot Device */
  75 #define ASUS_WMI_METHODID_GLCD          0x44434C47 /* Get LCD status */
  76 #define ASUS_WMI_METHODID_GPID          0x44495047 /* Get Panel ID?? (Resol) */
  77 #define ASUS_WMI_METHODID_QMOD          0x444F4D51 /* Quiet MODe */
  78 #define ASUS_WMI_METHODID_SPLV          0x4C425053 /* Set Panel Light Value */
  79 #define ASUS_WMI_METHODID_AGFN          0x4E464741 /* FaN? */
  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_ALS_ENABLE       0x00050001 /* Ambient Light Sensor */
 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 #define ASUS_WMI_DEVID_LIGHTBAR         0x00050025
 124
 125 /* Misc */
 126 #define ASUS_WMI_DEVID_CAMERA           0x00060013
 127
 128 /* Storage */
 129 #define ASUS_WMI_DEVID_CARDREADER       0x00080013
 130
 131 /* Input */
 132 #define ASUS_WMI_DEVID_TOUCHPAD         0x00100011
 133 #define ASUS_WMI_DEVID_TOUCHPAD_LED     0x00100012
 134
 135 /* Fan, Thermal */
 136 #define ASUS_WMI_DEVID_THERMAL_CTRL     0x00110011
 137 #define ASUS_WMI_DEVID_FAN_CTRL         0x00110012
 138
 139 /* Power */
 140 #define ASUS_WMI_DEVID_PROCESSOR_STATE  0x00120012
 141
 142 /* Deep S3 / Resume on LID open */
 143 #define ASUS_WMI_DEVID_LID_RESUME       0x00120031
 144
 145 /* DSTS masks */
 146 #define ASUS_WMI_DSTS_STATUS_BIT        0x00000001
 147 #define ASUS_WMI_DSTS_UNKNOWN_BIT       0x00000002
 148 #define ASUS_WMI_DSTS_PRESENCE_BIT      0x00010000
 149 #define ASUS_WMI_DSTS_USER_BIT          0x00020000
 150 #define ASUS_WMI_DSTS_BIOS_BIT          0x00040000
 151 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK   0x000000FF
 152 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK   0x0000FF00
 153 #define ASUS_WMI_DSTS_LIGHTBAR_MASK     0x0000000F
 154
 155 #define ASUS_FAN_DESC                   "cpu_fan"
 156 #define ASUS_FAN_MFUN                   0x13
 157 #define ASUS_FAN_SFUN_READ              0x06
 158 #define ASUS_FAN_SFUN_WRITE             0x07
 159 #define ASUS_FAN_CTRL_MANUAL            1
 160 #define ASUS_FAN_CTRL_AUTO              2
 161
 162 #define USB_INTEL_XUSB2PR               0xD0
 163 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI   0x9c31
 164
 165 static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
 166
 167 static bool ashs_present(void)
 168 {
 169         int i = 0;
 170         while (ashs_ids[i]) {
 171                 if (acpi_dev_found(ashs_ids[i++]))
 172                         return true;
 173         }
 174         return false;
 175 }
 176
 177 struct bios_args {
 178         u32 arg0;
 179         u32 arg1;
 180 } __packed;
 181
 182 /*
 183  * Struct that's used for all methods called via AGFN. Naming is
 184  * identically to the AML code.
 185  */
 186 struct agfn_args {
 187         u16 mfun; /* probably "Multi-function" to be called */
 188         u16 sfun; /* probably "Sub-function" to be called */
 189         u16 len;  /* size of the hole struct, including subfunction fields */
 190         u8 stas;  /* not used by now */
 191         u8 err;   /* zero on success */
 192 } __packed;
 193
 194 /* struct used for calling fan read and write methods */
 195 struct fan_args {
 196         struct agfn_args agfn;  /* common fields */
 197         u8 fan;                 /* fan number: 0: set auto mode 1: 1st fan */
 198         u32 speed;              /* read: RPM/100 - write: 0-255 */
 199 } __packed;
 200
 201 /*
 202  * <platform>/    - debugfs root directory
 203  *   dev_id      - current dev_id
 204  *   ctrl_param  - current ctrl_param
 205  *   method_id   - current method_id
 206  *   devs        - call DEVS(dev_id, ctrl_param) and print result
 207  *   dsts        - call DSTS(dev_id)  and print result
 208  *   call        - call method_id(dev_id, ctrl_param) and print result
 209  */
 210 struct asus_wmi_debug {
 211         struct dentry *root;
 212         u32 method_id;
 213         u32 dev_id;
 214         u32 ctrl_param;
 215 };
 216
 217 struct asus_rfkill {
 218         struct asus_wmi *asus;
 219         struct rfkill *rfkill;
 220         u32 dev_id;
 221 };
 222
 223 struct asus_wmi {
 224         int dsts_id;
 225         int spec;
 226         int sfun;
 227
 228         struct input_dev *inputdev;
 229         struct backlight_device *backlight_device;
 230         struct platform_device *platform_device;
 231
 232         struct led_classdev wlan_led;
 233         int wlan_led_wk;
 234         struct led_classdev tpd_led;
 235         int tpd_led_wk;
 236         struct led_classdev kbd_led;
 237         int kbd_led_wk;
 238         struct led_classdev lightbar_led;
 239         int lightbar_led_wk;
 240         struct workqueue_struct *led_workqueue;
 241         struct work_struct tpd_led_work;
 242         struct work_struct kbd_led_work;
 243         struct work_struct wlan_led_work;
 244         struct work_struct lightbar_led_work;
 245
 246         struct asus_rfkill wlan;
 247         struct asus_rfkill bluetooth;
 248         struct asus_rfkill wimax;
 249         struct asus_rfkill wwan3g;
 250         struct asus_rfkill gps;
 251         struct asus_rfkill uwb;
 252
 253         bool asus_hwmon_fan_manual_mode;
 254         int asus_hwmon_num_fans;
 255         int asus_hwmon_pwm;
 256
 257         struct hotplug_slot *hotplug_slot;
 258         struct mutex hotplug_lock;
 259         struct mutex wmi_lock;
 260         struct workqueue_struct *hotplug_workqueue;
 261         struct work_struct hotplug_work;
 262
 263         struct asus_wmi_debug debug;
 264
 265         struct asus_wmi_driver *driver;
 266 };
 267
 268 static int asus_wmi_input_init(struct asus_wmi *asus)
 269 {
 270         int err;
 271
 272         asus->inputdev = input_allocate_device();
 273         if (!asus->inputdev)
 274                 return -ENOMEM;
 275
 276         asus->inputdev->name = asus->driver->input_name;
 277         asus->inputdev->phys = asus->driver->input_phys;
 278         asus->inputdev->id.bustype = BUS_HOST;
 279         asus->inputdev->dev.parent = &asus->platform_device->dev;
 280         set_bit(EV_REP, asus->inputdev->evbit);
 281
 282         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
 283         if (err)
 284                 goto err_free_dev;
 285
 286         err = input_register_device(asus->inputdev);
 287         if (err)
 288                 goto err_free_dev;
 289
 290         return 0;
 291
 292 err_free_dev:
 293         input_free_device(asus->inputdev);
 294         return err;
 295 }
 296
 297 static void asus_wmi_input_exit(struct asus_wmi *asus)
 298 {
 299         if (asus->inputdev)
 300                 input_unregister_device(asus->inputdev);
 301
 302         asus->inputdev = NULL;
 303 }
 304
 305 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 306                                     u32 *retval)
 307 {
 308         struct bios_args args = {
 309                 .arg0 = arg0,
 310                 .arg1 = arg1,
 311         };
 312         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
 313         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 314         acpi_status status;
 315         union acpi_object *obj;
 316         u32 tmp = 0;
 317
 318         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
 319                                      &input, &output);
 320
 321         if (ACPI_FAILURE(status))
 322                 goto exit;
 323
 324         obj = (union acpi_object *)output.pointer;
 325         if (obj && obj->type == ACPI_TYPE_INTEGER)
 326                 tmp = (u32) obj->integer.value;
 327
 328         if (retval)
 329                 *retval = tmp;
 330
 331         kfree(obj);
 332
 333 exit:
 334         if (ACPI_FAILURE(status))
 335                 return -EIO;
 336
 337         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
 338                 return -ENODEV;
 339
 340         return 0;
 341 }
 342
 343 static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
 344 {
 345         struct acpi_buffer input;
 346         u64 phys_addr;
 347         u32 retval;
 348         u32 status = -1;
 349
 350         /*
 351          * Copy to dma capable address otherwise memory corruption occurs as
 352          * bios has to be able to access it.
 353          */
 354         input.pointer = kzalloc(args.length, GFP_DMA | GFP_KERNEL);
 355         input.length = args.length;
 356         if (!input.pointer)
 357                 return -ENOMEM;
 358         phys_addr = virt_to_phys(input.pointer);
 359         memcpy(input.pointer, args.pointer, args.length);
 360
 361         status = asus_wmi_evaluate_method(ASUS_WMI_METHODID_AGFN,
 362                                         phys_addr, 0, &retval);
 363         if (!status)
 364                 memcpy(args.pointer, input.pointer, args.length);
 365
 366         kfree(input.pointer);
 367         if (status)
 368                 return -ENXIO;
 369
 370         return retval;
 371 }
 372
 373 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 374 {
 375         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
 376 }
 377
 378 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 379                                  u32 *retval)
 380 {
 381         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 382                                         ctrl_param, retval);
 383 }
 384
 385 /* Helper for special devices with magic return codes */
 386 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
 387                                       u32 dev_id, u32 mask)
 388 {
 389         u32 retval = 0;
 390         int err;
 391
 392         err = asus_wmi_get_devstate(asus, dev_id, &retval);
 393
 394         if (err < 0)
 395                 return err;
 396
 397         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
 398                 return -ENODEV;
 399
 400         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
 401                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
 402                         return -ENODEV;
 403         }
 404
 405         return retval & mask;
 406 }
 407
 408 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
 409 {
 410         return asus_wmi_get_devstate_bits(asus, dev_id,
 411                                           ASUS_WMI_DSTS_STATUS_BIT);
 412 }
 413
 414 /*
 415  * LEDs
 416  */
 417 /*
 418  * These functions actually update the LED's, and are called from a
 419  * workqueue. By doing this as separate work rather than when the LED
 420  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 421  * potentially bad time, such as a timer interrupt.
 422  */
 423 static void tpd_led_update(struct work_struct *work)
 424 {
 425         int ctrl_param;
 426         struct asus_wmi *asus;
 427
 428         asus = container_of(work, struct asus_wmi, tpd_led_work);
 429
 430         ctrl_param = asus->tpd_led_wk;
 431         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
 432 }
 433
 434 static void tpd_led_set(struct led_classdev *led_cdev,
 435                         enum led_brightness value)
 436 {
 437         struct asus_wmi *asus;
 438
 439         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 440
 441         asus->tpd_led_wk = !!value;
 442         queue_work(asus->led_workqueue, &asus->tpd_led_work);
 443 }
 444
 445 static int read_tpd_led_state(struct asus_wmi *asus)
 446 {
 447         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
 448 }
 449
 450 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 451 {
 452         struct asus_wmi *asus;
 453
 454         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 455
 456         return read_tpd_led_state(asus);
 457 }
 458
 459 static void kbd_led_update(struct work_struct *work)
 460 {
 461         int ctrl_param = 0;
 462         struct asus_wmi *asus;
 463
 464         asus = container_of(work, struct asus_wmi, kbd_led_work);
 465
 466         ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
 467         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
 468         led_classdev_notify_brightness_hw_changed(&asus->kbd_led, asus->kbd_led_wk);
 469 }
 470
 471 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 472 {
 473         int retval;
 474
 475         /*
 476          * bits 0-2: level
 477          * bit 7: light on/off
 478          * bit 8-10: environment (0: dark, 1: normal, 2: light)
 479          * bit 17: status unknown
 480          */
 481         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
 482                                             0xFFFF);
 483
 484         /* Unknown status is considered as off */
 485         if (retval == 0x8000)
 486                 retval = 0;
 487
 488         if (retval >= 0) {
 489                 if (level)
 490                         *level = retval & 0x7F;
 491                 if (env)
 492                         *env = (retval >> 8) & 0x7F;
 493                 retval = 0;
 494         }
 495
 496         return retval;
 497 }
 498
 499 static void do_kbd_led_set(struct led_classdev *led_cdev, int value)
 500 {
 501         struct asus_wmi *asus;
 502         int max_level;
 503
 504         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 505         max_level = asus->kbd_led.max_brightness;
 506
 507         if (value > max_level)
 508                 value = max_level;
 509         else if (value < 0)
 510                 value = 0;
 511
 512         asus->kbd_led_wk = value;
 513         queue_work(asus->led_workqueue, &asus->kbd_led_work);
 514 }
 515
 516 static void kbd_led_set(struct led_classdev *led_cdev,
 517                         enum led_brightness value)
 518 {
 519         do_kbd_led_set(led_cdev, value);
 520 }
 521
 522 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
 523 {
 524         struct asus_wmi *asus;
 525         int retval, value;
 526
 527         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 528
 529         retval = kbd_led_read(asus, &value, NULL);
 530
 531         if (retval < 0)
 532                 return retval;
 533
 534         return value;
 535 }
 536
 537 static int wlan_led_unknown_state(struct asus_wmi *asus)
 538 {
 539         u32 result;
 540
 541         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 542
 543         return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
 544 }
 545
 546 static int wlan_led_presence(struct asus_wmi *asus)
 547 {
 548         u32 result;
 549
 550         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 551
 552         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
 553 }
 554
 555 static void wlan_led_update(struct work_struct *work)
 556 {
 557         int ctrl_param;
 558         struct asus_wmi *asus;
 559
 560         asus = container_of(work, struct asus_wmi, wlan_led_work);
 561
 562         ctrl_param = asus->wlan_led_wk;
 563         asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
 564 }
 565
 566 static void wlan_led_set(struct led_classdev *led_cdev,
 567                          enum led_brightness value)
 568 {
 569         struct asus_wmi *asus;
 570
 571         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 572
 573         asus->wlan_led_wk = !!value;
 574         queue_work(asus->led_workqueue, &asus->wlan_led_work);
 575 }
 576
 577 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
 578 {
 579         struct asus_wmi *asus;
 580         u32 result;
 581
 582         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 583         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 584
 585         return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
 586 }
 587
 588 static void lightbar_led_update(struct work_struct *work)
 589 {
 590         struct asus_wmi *asus;
 591         int ctrl_param;
 592
 593         asus = container_of(work, struct asus_wmi, lightbar_led_work);
 594
 595         ctrl_param = asus->lightbar_led_wk;
 596         asus_wmi_set_devstate(ASUS_WMI_DEVID_LIGHTBAR, ctrl_param, NULL);
 597 }
 598
 599 static void lightbar_led_set(struct led_classdev *led_cdev,
 600                              enum led_brightness value)
 601 {
 602         struct asus_wmi *asus;
 603
 604         asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
 605
 606         asus->lightbar_led_wk = !!value;
 607         queue_work(asus->led_workqueue, &asus->lightbar_led_work);
 608 }
 609
 610 static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
 611 {
 612         struct asus_wmi *asus;
 613         u32 result;
 614
 615         asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
 616         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
 617
 618         return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
 619 }
 620
 621 static int lightbar_led_presence(struct asus_wmi *asus)
 622 {
 623         u32 result;
 624
 625         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
 626
 627         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
 628 }
 629
 630 static void asus_wmi_led_exit(struct asus_wmi *asus)
 631 {
 632         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
 633                 led_classdev_unregister(&asus->kbd_led);
 634         if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
 635                 led_classdev_unregister(&asus->tpd_led);
 636         if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
 637                 led_classdev_unregister(&asus->wlan_led);
 638         if (!IS_ERR_OR_NULL(asus->lightbar_led.dev))
 639                 led_classdev_unregister(&asus->lightbar_led);
 640         if (asus->led_workqueue)
 641                 destroy_workqueue(asus->led_workqueue);
 642 }
 643
 644 static int asus_wmi_led_init(struct asus_wmi *asus)
 645 {
 646         int rv = 0, led_val;
 647
 648         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 649         if (!asus->led_workqueue)
 650                 return -ENOMEM;
 651
 652         if (read_tpd_led_state(asus) >= 0) {
 653                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 654
 655                 asus->tpd_led.name = "asus::touchpad";
 656                 asus->tpd_led.brightness_set = tpd_led_set;
 657                 asus->tpd_led.brightness_get = tpd_led_get;
 658                 asus->tpd_led.max_brightness = 1;
 659
 660                 rv = led_classdev_register(&asus->platform_device->dev,
 661                                            &asus->tpd_led);
 662                 if (rv)
 663                         goto error;
 664         }
 665
 666         led_val = kbd_led_read(asus, NULL, NULL);
 667         if (led_val >= 0) {
 668                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
 669
 670                 asus->kbd_led_wk = led_val;
 671                 asus->kbd_led.name = "asus::kbd_backlight";
 672                 asus->kbd_led.flags = LED_BRIGHT_HW_CHANGED;
 673                 asus->kbd_led.brightness_set = kbd_led_set;
 674                 asus->kbd_led.brightness_get = kbd_led_get;
 675                 asus->kbd_led.max_brightness = 3;
 676
 677                 rv = led_classdev_register(&asus->platform_device->dev,
 678                                            &asus->kbd_led);
 679                 if (rv)
 680                         goto error;
 681         }
 682
 683         if (wlan_led_presence(asus) && (asus->driver->quirks->wapf > 0)) {
 684                 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
 685
 686                 asus->wlan_led.name = "asus::wlan";
 687                 asus->wlan_led.brightness_set = wlan_led_set;
 688                 if (!wlan_led_unknown_state(asus))
 689                         asus->wlan_led.brightness_get = wlan_led_get;
 690                 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
 691                 asus->wlan_led.max_brightness = 1;
 692                 asus->wlan_led.default_trigger = "asus-wlan";
 693
 694                 rv = led_classdev_register(&asus->platform_device->dev,
 695                                            &asus->wlan_led);
 696                 if (rv)
 697                         goto error;
 698         }
 699
 700         if (lightbar_led_presence(asus)) {
 701                 INIT_WORK(&asus->lightbar_led_work, lightbar_led_update);
 702
 703                 asus->lightbar_led.name = "asus::lightbar";
 704                 asus->lightbar_led.brightness_set = lightbar_led_set;
 705                 asus->lightbar_led.brightness_get = lightbar_led_get;
 706                 asus->lightbar_led.max_brightness = 1;
 707
 708                 rv = led_classdev_register(&asus->platform_device->dev,
 709                                            &asus->lightbar_led);
 710         }
 711
 712 error:
 713         if (rv)
 714                 asus_wmi_led_exit(asus);
 715
 716         return rv;
 717 }
 718
 719
 720 /*
 721  * PCI hotplug (for wlan rfkill)
 722  */
 723 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 724 {
 725         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 726
 727         if (result < 0)
 728                 return false;
 729         return !result;
 730 }
 731
 732 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 733 {
 734         struct pci_dev *dev;
 735         struct pci_bus *bus;
 736         bool blocked;
 737         bool absent;
 738         u32 l;
 739
 740         mutex_lock(&asus->wmi_lock);
 741         blocked = asus_wlan_rfkill_blocked(asus);
 742         mutex_unlock(&asus->wmi_lock);
 743
 744         mutex_lock(&asus->hotplug_lock);
 745         pci_lock_rescan_remove();
 746
 747         if (asus->wlan.rfkill)
 748                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 749
 750         if (asus->hotplug_slot) {
 751                 bus = pci_find_bus(0, 1);
 752                 if (!bus) {
 753                         pr_warn("Unable to find PCI bus 1?\n");
 754                         goto out_unlock;
 755                 }
 756
 757                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 758                         pr_err("Unable to read PCI config space?\n");
 759                         goto out_unlock;
 760                 }
 761                 absent = (l == 0xffffffff);
 762
 763                 if (blocked != absent) {
 764                         pr_warn("BIOS says wireless lan is %s, "
 765                                 "but the pci device is %s\n",
 766                                 blocked ? "blocked" : "unblocked",
 767                                 absent ? "absent" : "present");
 768                         pr_warn("skipped wireless hotplug as probably "
 769                                 "inappropriate for this model\n");
 770                         goto out_unlock;
 771                 }
 772
 773                 if (!blocked) {
 774                         dev = pci_get_slot(bus, 0);
 775                         if (dev) {
 776                                 /* Device already present */
 777                                 pci_dev_put(dev);
 778                                 goto out_unlock;
 779                         }
 780                         dev = pci_scan_single_device(bus, 0);
 781                         if (dev) {
 782                                 pci_bus_assign_resources(bus);
 783                                 pci_bus_add_device(dev);
 784                         }
 785                 } else {
 786                         dev = pci_get_slot(bus, 0);
 787                         if (dev) {
 788                                 pci_stop_and_remove_bus_device(dev);
 789                                 pci_dev_put(dev);
 790                         }
 791                 }
 792         }
 793
 794 out_unlock:
 795         pci_unlock_rescan_remove();
 796         mutex_unlock(&asus->hotplug_lock);
 797 }
 798
 799 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
 800 {
 801         struct asus_wmi *asus = data;
 802
 803         if (event != ACPI_NOTIFY_BUS_CHECK)
 804                 return;
 805
 806         /*
 807          * We can't call directly asus_rfkill_hotplug because most
 808          * of the time WMBC is still being executed and not reetrant.
 809          * There is currently no way to tell ACPICA that  we want this
 810          * method to be serialized, we schedule a asus_rfkill_hotplug
 811          * call later, in a safer context.
 812          */
 813         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
 814 }
 815
 816 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 817 {
 818         acpi_status status;
 819         acpi_handle handle;
 820
 821         status = acpi_get_handle(NULL, node, &handle);
 822
 823         if (ACPI_SUCCESS(status)) {
 824                 status = acpi_install_notify_handler(handle,
 825                                                      ACPI_SYSTEM_NOTIFY,
 826                                                      asus_rfkill_notify, asus);
 827                 if (ACPI_FAILURE(status))
 828                         pr_warn("Failed to register notify on %s\n", node);
 829         } else
 830                 return -ENODEV;
 831
 832         return 0;
 833 }
 834
 835 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 836 {
 837         acpi_status status = AE_OK;
 838         acpi_handle handle;
 839
 840         status = acpi_get_handle(NULL, node, &handle);
 841
 842         if (ACPI_SUCCESS(status)) {
 843                 status = acpi_remove_notify_handler(handle,
 844                                                     ACPI_SYSTEM_NOTIFY,
 845                                                     asus_rfkill_notify);
 846                 if (ACPI_FAILURE(status))
 847                         pr_err("Error removing rfkill notify handler %s\n",
 848                                node);
 849         }
 850 }
 851
 852 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
 853                                    u8 *value)
 854 {
 855         struct asus_wmi *asus = hotplug_slot->private;
 856         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 857
 858         if (result < 0)
 859                 return result;
 860
 861         *value = !!result;
 862         return 0;
 863 }
 864
 865 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
 866         .owner = THIS_MODULE,
 867         .get_adapter_status = asus_get_adapter_status,
 868         .get_power_status = asus_get_adapter_status,
 869 };
 870
 871 static void asus_hotplug_work(struct work_struct *work)
 872 {
 873         struct asus_wmi *asus;
 874
 875         asus = container_of(work, struct asus_wmi, hotplug_work);
 876         asus_rfkill_hotplug(asus);
 877 }
 878
 879 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
 880 {
 881         int ret = -ENOMEM;
 882         struct pci_bus *bus = pci_find_bus(0, 1);
 883
 884         if (!bus) {
 885                 pr_err("Unable to find wifi PCI bus\n");
 886                 return -ENODEV;
 887         }
 888
 889         asus->hotplug_workqueue =
 890             create_singlethread_workqueue("hotplug_workqueue");
 891         if (!asus->hotplug_workqueue)
 892                 goto error_workqueue;
 893
 894         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
 895
 896         asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 897         if (!asus->hotplug_slot)
 898                 goto error_slot;
 899
 900         asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 901                                            GFP_KERNEL);
 902         if (!asus->hotplug_slot->info)
 903                 goto error_info;
 904
 905         asus->hotplug_slot->private = asus;
 906         asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
 907         asus_get_adapter_status(asus->hotplug_slot,
 908                                 &asus->hotplug_slot->info->adapter_status);
 909
 910         ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
 911         if (ret) {
 912                 pr_err("Unable to register hotplug slot - %d\n", ret);
 913                 goto error_register;
 914         }
 915
 916         return 0;
 917
 918 error_register:
 919         kfree(asus->hotplug_slot->info);
 920 error_info:
 921         kfree(asus->hotplug_slot);
 922         asus->hotplug_slot = NULL;
 923 error_slot:
 924         destroy_workqueue(asus->hotplug_workqueue);
 925 error_workqueue:
 926         return ret;
 927 }
 928
 929 /*
 930  * Rfkill devices
 931  */
 932 static int asus_rfkill_set(void *data, bool blocked)
 933 {
 934         struct asus_rfkill *priv = data;
 935         u32 ctrl_param = !blocked;
 936         u32 dev_id = priv->dev_id;
 937
 938         /*
 939          * If the user bit is set, BIOS can't set and record the wlan status,
 940          * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
 941          * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
 942          * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
 943          * while setting the wlan status through WMI.
 944          * This is also the behavior that windows app will do.
 945          */
 946         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 947              priv->asus->driver->wlan_ctrl_by_user)
 948                 dev_id = ASUS_WMI_DEVID_WLAN_LED;
 949
 950         return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
 951 }
 952
 953 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
 954 {
 955         struct asus_rfkill *priv = data;
 956         int result;
 957
 958         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
 959
 960         if (result < 0)
 961                 return;
 962
 963         rfkill_set_sw_state(priv->rfkill, !result);
 964 }
 965
 966 static int asus_rfkill_wlan_set(void *data, bool blocked)
 967 {
 968         struct asus_rfkill *priv = data;
 969         struct asus_wmi *asus = priv->asus;
 970         int ret;
 971
 972         /*
 973          * This handler is enabled only if hotplug is enabled.
 974          * In this case, the asus_wmi_set_devstate() will
 975          * trigger a wmi notification and we need to wait
 976          * this call to finish before being able to call
 977          * any wmi method
 978          */
 979         mutex_lock(&asus->wmi_lock);
 980         ret = asus_rfkill_set(data, blocked);
 981         mutex_unlock(&asus->wmi_lock);
 982         return ret;
 983 }
 984
 985 static const struct rfkill_ops asus_rfkill_wlan_ops = {
 986         .set_block = asus_rfkill_wlan_set,
 987         .query = asus_rfkill_query,
 988 };
 989
 990 static const struct rfkill_ops asus_rfkill_ops = {
 991         .set_block = asus_rfkill_set,
 992         .query = asus_rfkill_query,
 993 };
 994
 995 static int asus_new_rfkill(struct asus_wmi *asus,
 996                            struct asus_rfkill *arfkill,
 997                            const char *name, enum rfkill_type type, int dev_id)
 998 {
 999         int result = asus_wmi_get_devstate_simple(asus, dev_id);
1000         struct rfkill **rfkill = &arfkill->rfkill;
1001
1002         if (result < 0)
1003                 return result;
1004
1005         arfkill->dev_id = dev_id;
1006         arfkill->asus = asus;
1007
1008         if (dev_id == ASUS_WMI_DEVID_WLAN &&
1009             asus->driver->quirks->hotplug_wireless)
1010                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
1011                                        &asus_rfkill_wlan_ops, arfkill);
1012         else
1013                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
1014                                        &asus_rfkill_ops, arfkill);
1015
1016         if (!*rfkill)
1017                 return -EINVAL;
1018
1019         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
1020                         (asus->driver->quirks->wapf > 0))
1021                 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
1022
1023         rfkill_init_sw_state(*rfkill, !result);
1024         result = rfkill_register(*rfkill);
1025         if (result) {
1026                 rfkill_destroy(*rfkill);
1027                 *rfkill = NULL;
1028                 return result;
1029         }
1030         return 0;
1031 }
1032
1033 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
1034 {
1035         if (asus->driver->wlan_ctrl_by_user && ashs_present())
1036                 return;
1037
1038         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1039         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1040         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1041         if (asus->wlan.rfkill) {
1042                 rfkill_unregister(asus->wlan.rfkill);
1043                 rfkill_destroy(asus->wlan.rfkill);
1044                 asus->wlan.rfkill = NULL;
1045         }
1046         /*
1047          * Refresh pci hotplug in case the rfkill state was changed after
1048          * asus_unregister_rfkill_notifier()
1049          */
1050         asus_rfkill_hotplug(asus);
1051         if (asus->hotplug_slot) {
1052                 pci_hp_deregister(asus->hotplug_slot);
1053                 kfree(asus->hotplug_slot->info);
1054                 kfree(asus->hotplug_slot);
1055         }
1056         if (asus->hotplug_workqueue)
1057                 destroy_workqueue(asus->hotplug_workqueue);
1058
1059         if (asus->bluetooth.rfkill) {
1060                 rfkill_unregister(asus->bluetooth.rfkill);
1061                 rfkill_destroy(asus->bluetooth.rfkill);
1062                 asus->bluetooth.rfkill = NULL;
1063         }
1064         if (asus->wimax.rfkill) {
1065                 rfkill_unregister(asus->wimax.rfkill);
1066                 rfkill_destroy(asus->wimax.rfkill);
1067                 asus->wimax.rfkill = NULL;
1068         }
1069         if (asus->wwan3g.rfkill) {
1070                 rfkill_unregister(asus->wwan3g.rfkill);
1071                 rfkill_destroy(asus->wwan3g.rfkill);
1072                 asus->wwan3g.rfkill = NULL;
1073         }
1074         if (asus->gps.rfkill) {
1075                 rfkill_unregister(asus->gps.rfkill);
1076                 rfkill_destroy(asus->gps.rfkill);
1077                 asus->gps.rfkill = NULL;
1078         }
1079         if (asus->uwb.rfkill) {
1080                 rfkill_unregister(asus->uwb.rfkill);
1081                 rfkill_destroy(asus->uwb.rfkill);
1082                 asus->uwb.rfkill = NULL;
1083         }
1084 }
1085
1086 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
1087 {
1088         int result = 0;
1089
1090         mutex_init(&asus->hotplug_lock);
1091         mutex_init(&asus->wmi_lock);
1092
1093         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
1094                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
1095
1096         if (result && result != -ENODEV)
1097                 goto exit;
1098
1099         result = asus_new_rfkill(asus, &asus->bluetooth,
1100                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
1101                                  ASUS_WMI_DEVID_BLUETOOTH);
1102
1103         if (result && result != -ENODEV)
1104                 goto exit;
1105
1106         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
1107                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
1108
1109         if (result && result != -ENODEV)
1110                 goto exit;
1111
1112         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
1113                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
1114
1115         if (result && result != -ENODEV)
1116                 goto exit;
1117
1118         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
1119                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
1120
1121         if (result && result != -ENODEV)
1122                 goto exit;
1123
1124         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
1125                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
1126
1127         if (result && result != -ENODEV)
1128                 goto exit;
1129
1130         if (!asus->driver->quirks->hotplug_wireless)
1131                 goto exit;
1132
1133         result = asus_setup_pci_hotplug(asus);
1134         /*
1135          * If we get -EBUSY then something else is handling the PCI hotplug -
1136          * don't fail in this case
1137          */
1138         if (result == -EBUSY)
1139                 result = 0;
1140
1141         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1142         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1143         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1144         /*
1145          * Refresh pci hotplug in case the rfkill state was changed during
1146          * setup.
1147          */
1148         asus_rfkill_hotplug(asus);
1149
1150 exit:
1151         if (result && result != -ENODEV)
1152                 asus_wmi_rfkill_exit(asus);
1153
1154         if (result == -ENODEV)
1155                 result = 0;
1156
1157         return result;
1158 }
1159
1160 static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
1161 {
1162         struct pci_dev *xhci_pdev;
1163         u32 orig_ports_available;
1164         u32 ports_available = asus->driver->quirks->xusb2pr;
1165
1166         xhci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
1167                         PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI,
1168                         NULL);
1169
1170         if (!xhci_pdev)
1171                 return;
1172
1173         pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1174                                 &orig_ports_available);
1175
1176         pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1177                                 cpu_to_le32(ports_available));
1178
1179         pr_info("set USB_INTEL_XUSB2PR old: 0x%04x, new: 0x%04x\n",
1180                         orig_ports_available, ports_available);
1181 }
1182
1183 /*
1184  * Some devices dont support or have borcken get_als method
1185  * but still support set method.
1186  */
1187 static void asus_wmi_set_als(void)
1188 {
1189         asus_wmi_set_devstate(ASUS_WMI_DEVID_ALS_ENABLE, 1, NULL);
1190 }
1191
1192 /*
1193  * Hwmon device
1194  */
1195 static int asus_hwmon_agfn_fan_speed_read(struct asus_wmi *asus, int fan,
1196                                           int *speed)
1197 {
1198         struct fan_args args = {
1199                 .agfn.len = sizeof(args),
1200                 .agfn.mfun = ASUS_FAN_MFUN,
1201                 .agfn.sfun = ASUS_FAN_SFUN_READ,
1202                 .fan = fan,
1203                 .speed = 0,
1204         };
1205         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1206         int status;
1207
1208         if (fan != 1)
1209                 return -EINVAL;
1210
1211         status = asus_wmi_evaluate_method_agfn(input);
1212
1213         if (status || args.agfn.err)
1214                 return -ENXIO;
1215
1216         if (speed)
1217                 *speed = args.speed;
1218
1219         return 0;
1220 }
1221
1222 static int asus_hwmon_agfn_fan_speed_write(struct asus_wmi *asus, int fan,
1223                                      int *speed)
1224 {
1225         struct fan_args args = {
1226                 .agfn.len = sizeof(args),
1227                 .agfn.mfun = ASUS_FAN_MFUN,
1228                 .agfn.sfun = ASUS_FAN_SFUN_WRITE,
1229                 .fan = fan,
1230                 .speed = speed ?  *speed : 0,
1231         };
1232         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1233         int status;
1234
1235         /* 1: for setting 1st fan's speed 0: setting auto mode */
1236         if (fan != 1 && fan != 0)
1237                 return -EINVAL;
1238
1239         status = asus_wmi_evaluate_method_agfn(input);
1240
1241         if (status || args.agfn.err)
1242                 return -ENXIO;
1243
1244         if (speed && fan == 1)
1245                 asus->asus_hwmon_pwm = *speed;
1246
1247         return 0;
1248 }
1249
1250 /*
1251  * Check if we can read the speed of one fan. If true we assume we can also
1252  * control it.
1253  */
1254 static int asus_hwmon_get_fan_number(struct asus_wmi *asus, int *num_fans)
1255 {
1256         int status;
1257         int speed = 0;
1258
1259         *num_fans = 0;
1260
1261         status = asus_hwmon_agfn_fan_speed_read(asus, 1, &speed);
1262         if (!status)
1263                 *num_fans = 1;
1264
1265         return 0;
1266 }
1267
1268 static int asus_hwmon_fan_set_auto(struct asus_wmi *asus)
1269 {
1270         int status;
1271
1272         status = asus_hwmon_agfn_fan_speed_write(asus, 0, NULL);
1273         if (status)
1274                 return -ENXIO;
1275
1276         asus->asus_hwmon_fan_manual_mode = false;
1277
1278         return 0;
1279 }
1280
1281 static int asus_hwmon_fan_rpm_show(struct device *dev, int fan)
1282 {
1283         struct asus_wmi *asus = dev_get_drvdata(dev);
1284         int value;
1285         int ret;
1286
1287         /* no speed readable on manual mode */
1288         if (asus->asus_hwmon_fan_manual_mode)
1289                 return -ENXIO;
1290
1291         ret = asus_hwmon_agfn_fan_speed_read(asus, fan+1, &value);
1292         if (ret) {
1293                 pr_warn("reading fan speed failed: %d\n", ret);
1294                 return -ENXIO;
1295         }
1296
1297         return value;
1298 }
1299
1300 static void asus_hwmon_pwm_show(struct asus_wmi *asus, int fan, int *value)
1301 {
1302         int err;
1303
1304         if (asus->asus_hwmon_pwm >= 0) {
1305                 *value = asus->asus_hwmon_pwm;
1306                 return;
1307         }
1308
1309         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, value);
1310         if (err < 0)
1311                 return;
1312
1313         *value &= 0xFF;
1314
1315         if (*value == 1) /* Low Speed */
1316                 *value = 85;
1317         else if (*value == 2)
1318                 *value = 170;
1319         else if (*value == 3)
1320                 *value = 255;
1321         else if (*value) {
1322                 pr_err("Unknown fan speed %#x\n", *value);
1323                 *value = -1;
1324         }
1325 }
1326
1327 static ssize_t pwm1_show(struct device *dev,
1328                                struct device_attribute *attr,
1329                                char *buf)
1330 {
1331         struct asus_wmi *asus = dev_get_drvdata(dev);
1332         int value;
1333
1334         asus_hwmon_pwm_show(asus, 0, &value);
1335
1336         return sprintf(buf, "%d\n", value);
1337 }
1338
1339 static ssize_t pwm1_store(struct device *dev,
1340                                      struct device_attribute *attr,
1341                                      const char *buf, size_t count) {
1342         struct asus_wmi *asus = dev_get_drvdata(dev);
1343         int value;
1344         int state;
1345         int ret;
1346
1347         ret = kstrtouint(buf, 10, &value);
1348
1349         if (ret)
1350                 return ret;
1351
1352         value = clamp(value, 0, 255);
1353
1354         state = asus_hwmon_agfn_fan_speed_write(asus, 1, &value);
1355         if (state)
1356                 pr_warn("Setting fan speed failed: %d\n", state);
1357         else
1358                 asus->asus_hwmon_fan_manual_mode = true;
1359
1360         return count;
1361 }
1362
1363 static ssize_t fan1_input_show(struct device *dev,
1364                                         struct device_attribute *attr,
1365                                         char *buf)
1366 {
1367         int value = asus_hwmon_fan_rpm_show(dev, 0);
1368
1369         return sprintf(buf, "%d\n", value < 0 ? -1 : value*100);
1370
1371 }
1372
1373 static ssize_t pwm1_enable_show(struct device *dev,
1374                                                  struct device_attribute *attr,
1375                                                  char *buf)
1376 {
1377         struct asus_wmi *asus = dev_get_drvdata(dev);
1378
1379         if (asus->asus_hwmon_fan_manual_mode)
1380                 return sprintf(buf, "%d\n", ASUS_FAN_CTRL_MANUAL);
1381
1382         return sprintf(buf, "%d\n", ASUS_FAN_CTRL_AUTO);
1383 }
1384
1385 static ssize_t pwm1_enable_store(struct device *dev,
1386                                                   struct device_attribute *attr,
1387                                                   const char *buf, size_t count)
1388 {
1389         struct asus_wmi *asus = dev_get_drvdata(dev);
1390         int status = 0;
1391         int state;
1392         int ret;
1393
1394         ret = kstrtouint(buf, 10, &state);
1395
1396         if (ret)
1397                 return ret;
1398
1399         if (state == ASUS_FAN_CTRL_MANUAL)
1400                 asus->asus_hwmon_fan_manual_mode = true;
1401         else
1402                 status = asus_hwmon_fan_set_auto(asus);
1403
1404         if (status)
1405                 return status;
1406
1407         return count;
1408 }
1409
1410 static ssize_t fan1_label_show(struct device *dev,
1411                                           struct device_attribute *attr,
1412                                           char *buf)
1413 {
1414         return sprintf(buf, "%s\n", ASUS_FAN_DESC);
1415 }
1416
1417 static ssize_t asus_hwmon_temp1(struct device *dev,
1418                                 struct device_attribute *attr,
1419                                 char *buf)
1420 {
1421         struct asus_wmi *asus = dev_get_drvdata(dev);
1422         u32 value;
1423         int err;
1424
1425         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1426
1427         if (err < 0)
1428                 return err;
1429
1430         value = DECI_KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1431
1432         return sprintf(buf, "%d\n", value);
1433 }
1434
1435 /* Fan1 */
1436 static DEVICE_ATTR_RW(pwm1);
1437 static DEVICE_ATTR_RW(pwm1_enable);
1438 static DEVICE_ATTR_RO(fan1_input);
1439 static DEVICE_ATTR_RO(fan1_label);
1440
1441 /* Temperature */
1442 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1443
1444 static struct attribute *hwmon_attributes[] = {
1445         &dev_attr_pwm1.attr,
1446         &dev_attr_pwm1_enable.attr,
1447         &dev_attr_fan1_input.attr,
1448         &dev_attr_fan1_label.attr,
1449
1450         &dev_attr_temp1_input.attr,
1451         NULL
1452 };
1453
1454 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1455                                           struct attribute *attr, int idx)
1456 {
1457         struct device *dev = container_of(kobj, struct device, kobj);
1458         struct platform_device *pdev = to_platform_device(dev->parent);
1459         struct asus_wmi *asus = platform_get_drvdata(pdev);
1460         int dev_id = -1;
1461         int fan_attr = -1;
1462         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1463         bool ok = true;
1464
1465         if (attr == &dev_attr_pwm1.attr)
1466                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1467         else if (attr == &dev_attr_temp1_input.attr)
1468                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1469
1470
1471         if (attr == &dev_attr_fan1_input.attr
1472             || attr == &dev_attr_fan1_label.attr
1473             || attr == &dev_attr_pwm1.attr
1474             || attr == &dev_attr_pwm1_enable.attr) {
1475                 fan_attr = 1;
1476         }
1477
1478         if (dev_id != -1) {
1479                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1480
1481                 if (err < 0 && fan_attr == -1)
1482                         return 0; /* can't return negative here */
1483         }
1484
1485         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1486                 /*
1487                  * We need to find a better way, probably using sfun,
1488                  * bits or spec ...
1489                  * Currently we disable it if:
1490                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1491                  * - reverved bits are non-zero
1492                  * - sfun and presence bit are not set
1493                  */
1494                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1495                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1496                         ok = false;
1497                 else
1498                         ok = fan_attr <= asus->asus_hwmon_num_fans;
1499         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1500                 /* If value is zero, something is clearly wrong */
1501                 if (!value)
1502                         ok = false;
1503         } else if (fan_attr <= asus->asus_hwmon_num_fans && fan_attr != -1) {
1504                 ok = true;
1505         } else {
1506                 ok = false;
1507         }
1508
1509         return ok ? attr->mode : 0;
1510 }
1511
1512 static const struct attribute_group hwmon_attribute_group = {
1513         .is_visible = asus_hwmon_sysfs_is_visible,
1514         .attrs = hwmon_attributes
1515 };
1516 __ATTRIBUTE_GROUPS(hwmon_attribute);
1517
1518 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1519 {
1520         struct device *hwmon;
1521
1522         hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1523                                                   "asus", asus,
1524                                                   hwmon_attribute_groups);
1525         if (IS_ERR(hwmon)) {
1526                 pr_err("Could not register asus hwmon device\n");
1527                 return PTR_ERR(hwmon);
1528         }
1529         return 0;
1530 }
1531
1532 /*
1533  * Backlight
1534  */
1535 static int read_backlight_power(struct asus_wmi *asus)
1536 {
1537         int ret;
1538         if (asus->driver->quirks->store_backlight_power)
1539                 ret = !asus->driver->panel_power;
1540         else
1541                 ret = asus_wmi_get_devstate_simple(asus,
1542                                                    ASUS_WMI_DEVID_BACKLIGHT);
1543
1544         if (ret < 0)
1545                 return ret;
1546
1547         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1548 }
1549
1550 static int read_brightness_max(struct asus_wmi *asus)
1551 {
1552         u32 retval;
1553         int err;
1554
1555         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1556
1557         if (err < 0)
1558                 return err;
1559
1560         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1561         retval >>= 8;
1562
1563         if (!retval)
1564                 return -ENODEV;
1565
1566         return retval;
1567 }
1568
1569 static int read_brightness(struct backlight_device *bd)
1570 {
1571         struct asus_wmi *asus = bl_get_data(bd);
1572         u32 retval;
1573         int err;
1574
1575         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1576
1577         if (err < 0)
1578                 return err;
1579
1580         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1581 }
1582
1583 static u32 get_scalar_command(struct backlight_device *bd)
1584 {
1585         struct asus_wmi *asus = bl_get_data(bd);
1586         u32 ctrl_param = 0;
1587
1588         if ((asus->driver->brightness < bd->props.brightness) ||
1589             bd->props.brightness == bd->props.max_brightness)
1590                 ctrl_param = 0x00008001;
1591         else if ((asus->driver->brightness > bd->props.brightness) ||
1592                  bd->props.brightness == 0)
1593                 ctrl_param = 0x00008000;
1594
1595         asus->driver->brightness = bd->props.brightness;
1596
1597         return ctrl_param;
1598 }
1599
1600 static int update_bl_status(struct backlight_device *bd)
1601 {
1602         struct asus_wmi *asus = bl_get_data(bd);
1603         u32 ctrl_param;
1604         int power, err = 0;
1605
1606         power = read_backlight_power(asus);
1607         if (power != -ENODEV && bd->props.power != power) {
1608                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1609                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1610                                             ctrl_param, NULL);
1611                 if (asus->driver->quirks->store_backlight_power)
1612                         asus->driver->panel_power = bd->props.power;
1613
1614                 /* When using scalar brightness, updating the brightness
1615                  * will mess with the backlight power */
1616                 if (asus->driver->quirks->scalar_panel_brightness)
1617                         return err;
1618         }
1619
1620         if (asus->driver->quirks->scalar_panel_brightness)
1621                 ctrl_param = get_scalar_command(bd);
1622         else
1623                 ctrl_param = bd->props.brightness;
1624
1625         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1626                                     ctrl_param, NULL);
1627
1628         return err;
1629 }
1630
1631 static const struct backlight_ops asus_wmi_bl_ops = {
1632         .get_brightness = read_brightness,
1633         .update_status = update_bl_status,
1634 };
1635
1636 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1637 {
1638         struct backlight_device *bd = asus->backlight_device;
1639         int old = bd->props.brightness;
1640         int new = old;
1641
1642         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1643                 new = code - NOTIFY_BRNUP_MIN + 1;
1644         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1645                 new = code - NOTIFY_BRNDOWN_MIN;
1646
1647         bd->props.brightness = new;
1648         backlight_update_status(bd);
1649         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1650
1651         return old;
1652 }
1653
1654 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1655 {
1656         struct backlight_device *bd;
1657         struct backlight_properties props;
1658         int max;
1659         int power;
1660
1661         max = read_brightness_max(asus);
1662         if (max < 0)
1663                 return max;
1664
1665         power = read_backlight_power(asus);
1666
1667         if (power == -ENODEV)
1668                 power = FB_BLANK_UNBLANK;
1669         else if (power < 0)
1670                 return power;
1671
1672         memset(&props, 0, sizeof(struct backlight_properties));
1673         props.type = BACKLIGHT_PLATFORM;
1674         props.max_brightness = max;
1675         bd = backlight_device_register(asus->driver->name,
1676                                        &asus->platform_device->dev, asus,
1677                                        &asus_wmi_bl_ops, &props);
1678         if (IS_ERR(bd)) {
1679                 pr_err("Could not register backlight device\n");
1680                 return PTR_ERR(bd);
1681         }
1682
1683         asus->backlight_device = bd;
1684
1685         if (asus->driver->quirks->store_backlight_power)
1686                 asus->driver->panel_power = power;
1687
1688         bd->props.brightness = read_brightness(bd);
1689         bd->props.power = power;
1690         backlight_update_status(bd);
1691
1692         asus->driver->brightness = bd->props.brightness;
1693
1694         return 0;
1695 }
1696
1697 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1698 {
1699         backlight_device_unregister(asus->backlight_device);
1700
1701         asus->backlight_device = NULL;
1702 }
1703
1704 static int is_display_toggle(int code)
1705 {
1706         /* display toggle keys */
1707         if ((code >= 0x61 && code <= 0x67) ||
1708             (code >= 0x8c && code <= 0x93) ||
1709             (code >= 0xa0 && code <= 0xa7) ||
1710             (code >= 0xd0 && code <= 0xd5))
1711                 return 1;
1712
1713         return 0;
1714 }
1715
1716 static void asus_wmi_notify(u32 value, void *context)
1717 {
1718         struct asus_wmi *asus = context;
1719         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1720         union acpi_object *obj;
1721         acpi_status status;
1722         int code;
1723         int orig_code;
1724         unsigned int key_value = 1;
1725         bool autorelease = 1;
1726
1727         status = wmi_get_event_data(value, &response);
1728         if (status != AE_OK) {
1729                 pr_err("bad event status 0x%x\n", status);
1730                 return;
1731         }
1732
1733         obj = (union acpi_object *)response.pointer;
1734
1735         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1736                 goto exit;
1737
1738         code = obj->integer.value;
1739         orig_code = code;
1740
1741         if (asus->driver->key_filter) {
1742                 asus->driver->key_filter(asus->driver, &code, &key_value,
1743                                          &autorelease);
1744                 if (code == ASUS_WMI_KEY_IGNORE)
1745                         goto exit;
1746         }
1747
1748         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1749                 code = ASUS_WMI_BRN_UP;
1750         else if (code >= NOTIFY_BRNDOWN_MIN &&
1751                  code <= NOTIFY_BRNDOWN_MAX)
1752                 code = ASUS_WMI_BRN_DOWN;
1753
1754         if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1755                 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1756                         asus_wmi_backlight_notify(asus, orig_code);
1757                         goto exit;
1758                 }
1759         }
1760
1761         if (code == NOTIFY_KBD_BRTUP) {
1762                 do_kbd_led_set(&asus->kbd_led, asus->kbd_led_wk + 1);
1763                 goto exit;
1764         }
1765         if (code == NOTIFY_KBD_BRTDWN) {
1766                 do_kbd_led_set(&asus->kbd_led, asus->kbd_led_wk - 1);
1767                 goto exit;
1768         }
1769         if (code == NOTIFY_KBD_BRTTOGGLE) {
1770                 if (asus->kbd_led_wk == asus->kbd_led.max_brightness)
1771                         do_kbd_led_set(&asus->kbd_led, 0);
1772                 else
1773                         do_kbd_led_set(&asus->kbd_led, asus->kbd_led_wk + 1);
1774                 goto exit;
1775         }
1776
1777         if (is_display_toggle(code) &&
1778             asus->driver->quirks->no_display_toggle)
1779                 goto exit;
1780
1781         if (!sparse_keymap_report_event(asus->inputdev, code,
1782                                         key_value, autorelease))
1783                 pr_info("Unknown key %x pressed\n", code);
1784
1785 exit:
1786         kfree(obj);
1787 }
1788
1789 /*
1790  * Sys helpers
1791  */
1792 static int parse_arg(const char *buf, unsigned long count, int *val)
1793 {
1794         if (!count)
1795                 return 0;
1796         if (sscanf(buf, "%i", val) != 1)
1797                 return -EINVAL;
1798         return count;
1799 }
1800
1801 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1802                              const char *buf, size_t count)
1803 {
1804         u32 retval;
1805         int rv, err, value;
1806
1807         value = asus_wmi_get_devstate_simple(asus, devid);
1808         if (value < 0)
1809                 return value;
1810
1811         rv = parse_arg(buf, count, &value);
1812         err = asus_wmi_set_devstate(devid, value, &retval);
1813
1814         if (err < 0)
1815                 return err;
1816
1817         return rv;
1818 }
1819
1820 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1821 {
1822         int value = asus_wmi_get_devstate_simple(asus, devid);
1823
1824         if (value < 0)
1825                 return value;
1826
1827         return sprintf(buf, "%d\n", value);
1828 }
1829
1830 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1831         static ssize_t show_##_name(struct device *dev,                 \
1832                                     struct device_attribute *attr,      \
1833                                     char *buf)                          \
1834         {                                                               \
1835                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1836                                                                         \
1837                 return show_sys_wmi(asus, _cm, buf);                    \
1838         }                                                               \
1839         static ssize_t store_##_name(struct device *dev,                \
1840                                      struct device_attribute *attr,     \
1841                                      const char *buf, size_t count)     \
1842         {                                                               \
1843                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1844                                                                         \
1845                 return store_sys_wmi(asus, _cm, buf, count);            \
1846         }                                                               \
1847         static struct device_attribute dev_attr_##_name = {             \
1848                 .attr = {                                               \
1849                         .name = __stringify(_name),                     \
1850                         .mode = _mode },                                \
1851                 .show   = show_##_name,                                 \
1852                 .store  = store_##_name,                                \
1853         }
1854
1855 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1856 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1857 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1858 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1859 ASUS_WMI_CREATE_DEVICE_ATTR(als_enable, 0644, ASUS_WMI_DEVID_ALS_ENABLE);
1860
1861 static ssize_t cpufv_store(struct device *dev, struct device_attribute *attr,
1862                            const char *buf, size_t count)
1863 {
1864         int value, rv;
1865
1866         if (!count || sscanf(buf, "%i", &value) != 1)
1867                 return -EINVAL;
1868         if (value < 0 || value > 2)
1869                 return -EINVAL;
1870
1871         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1872         if (rv < 0)
1873                 return rv;
1874
1875         return count;
1876 }
1877
1878 static DEVICE_ATTR_WO(cpufv);
1879
1880 static struct attribute *platform_attributes[] = {
1881         &dev_attr_cpufv.attr,
1882         &dev_attr_camera.attr,
1883         &dev_attr_cardr.attr,
1884         &dev_attr_touchpad.attr,
1885         &dev_attr_lid_resume.attr,
1886         &dev_attr_als_enable.attr,
1887         NULL
1888 };
1889
1890 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1891                                     struct attribute *attr, int idx)
1892 {
1893         struct device *dev = container_of(kobj, struct device, kobj);
1894         struct asus_wmi *asus = dev_get_drvdata(dev);
1895         bool ok = true;
1896         int devid = -1;
1897
1898         if (attr == &dev_attr_camera.attr)
1899                 devid = ASUS_WMI_DEVID_CAMERA;
1900         else if (attr == &dev_attr_cardr.attr)
1901                 devid = ASUS_WMI_DEVID_CARDREADER;
1902         else if (attr == &dev_attr_touchpad.attr)
1903                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1904         else if (attr == &dev_attr_lid_resume.attr)
1905                 devid = ASUS_WMI_DEVID_LID_RESUME;
1906         else if (attr == &dev_attr_als_enable.attr)
1907                 devid = ASUS_WMI_DEVID_ALS_ENABLE;
1908
1909         if (devid != -1)
1910                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1911
1912         return ok ? attr->mode : 0;
1913 }
1914
1915 static const struct attribute_group platform_attribute_group = {
1916         .is_visible = asus_sysfs_is_visible,
1917         .attrs = platform_attributes
1918 };
1919
1920 static void asus_wmi_sysfs_exit(struct platform_device *device)
1921 {
1922         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1923 }
1924
1925 static int asus_wmi_sysfs_init(struct platform_device *device)
1926 {
1927         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1928 }
1929
1930 /*
1931  * Platform device
1932  */
1933 static int asus_wmi_platform_init(struct asus_wmi *asus)
1934 {
1935         int rv;
1936
1937         /* INIT enable hotkeys on some models */
1938         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1939                 pr_info("Initialization: %#x\n", rv);
1940
1941         /* We don't know yet what to do with this version... */
1942         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1943                 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1944                 asus->spec = rv;
1945         }
1946
1947         /*
1948          * The SFUN method probably allows the original driver to get the list
1949          * of features supported by a given model. For now, 0x0100 or 0x0800
1950          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1951          * The significance of others is yet to be found.
1952          */
1953         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1954                 pr_info("SFUN value: %#x\n", rv);
1955                 asus->sfun = rv;
1956         }
1957
1958         /*
1959          * Eee PC and Notebooks seems to have different method_id for DSTS,
1960          * but it may also be related to the BIOS's SPEC.
1961          * Note, on most Eeepc, there is no way to check if a method exist
1962          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1963          * but once again, SPEC may probably be used for that kind of things.
1964          */
1965         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1966                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1967         else
1968                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1969
1970         /* CWAP allow to define the behavior of the Fn+F2 key,
1971          * this method doesn't seems to be present on Eee PCs */
1972         if (asus->driver->quirks->wapf >= 0)
1973                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1974                                       asus->driver->quirks->wapf, NULL);
1975
1976         return asus_wmi_sysfs_init(asus->platform_device);
1977 }
1978
1979 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1980 {
1981         asus_wmi_sysfs_exit(asus->platform_device);
1982 }
1983
1984 /*
1985  * debugfs
1986  */
1987 struct asus_wmi_debugfs_node {
1988         struct asus_wmi *asus;
1989         char *name;
1990         int (*show) (struct seq_file *m, void *data);
1991 };
1992
1993 static int show_dsts(struct seq_file *m, void *data)
1994 {
1995         struct asus_wmi *asus = m->private;
1996         int err;
1997         u32 retval = -1;
1998
1999         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
2000
2001         if (err < 0)
2002                 return err;
2003
2004         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
2005
2006         return 0;
2007 }
2008
2009 static int show_devs(struct seq_file *m, void *data)
2010 {
2011         struct asus_wmi *asus = m->private;
2012         int err;
2013         u32 retval = -1;
2014
2015         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
2016                                     &retval);
2017
2018         if (err < 0)
2019                 return err;
2020
2021         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
2022                    asus->debug.ctrl_param, retval);
2023
2024         return 0;
2025 }
2026
2027 static int show_call(struct seq_file *m, void *data)
2028 {
2029         struct asus_wmi *asus = m->private;
2030         struct bios_args args = {
2031                 .arg0 = asus->debug.dev_id,
2032                 .arg1 = asus->debug.ctrl_param,
2033         };
2034         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
2035         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
2036         union acpi_object *obj;
2037         acpi_status status;
2038
2039         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
2040                                      0, asus->debug.method_id,
2041                                      &input, &output);
2042
2043         if (ACPI_FAILURE(status))
2044                 return -EIO;
2045
2046         obj = (union acpi_object *)output.pointer;
2047         if (obj && obj->type == ACPI_TYPE_INTEGER)
2048                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
2049                            asus->debug.dev_id, asus->debug.ctrl_param,
2050                            (u32) obj->integer.value);
2051         else
2052                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
2053                            asus->debug.dev_id, asus->debug.ctrl_param,
2054                            obj ? obj->type : -1);
2055
2056         kfree(obj);
2057
2058         return 0;
2059 }
2060
2061 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
2062         {NULL, "devs", show_devs},
2063         {NULL, "dsts", show_dsts},
2064         {NULL, "call", show_call},
2065 };
2066
2067 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
2068 {
2069         struct asus_wmi_debugfs_node *node = inode->i_private;
2070
2071         return single_open(file, node->show, node->asus);
2072 }
2073
2074 static const struct file_operations asus_wmi_debugfs_io_ops = {
2075         .owner = THIS_MODULE,
2076         .open = asus_wmi_debugfs_open,
2077         .read = seq_read,
2078         .llseek = seq_lseek,
2079         .release = single_release,
2080 };
2081
2082 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
2083 {
2084         debugfs_remove_recursive(asus->debug.root);
2085 }
2086
2087 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
2088 {
2089         struct dentry *dent;
2090         int i;
2091
2092         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
2093         if (!asus->debug.root) {
2094                 pr_err("failed to create debugfs directory\n");
2095                 goto error_debugfs;
2096         }
2097
2098         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
2099                                   asus->debug.root, &asus->debug.method_id);
2100         if (!dent)
2101                 goto error_debugfs;
2102
2103         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
2104                                   asus->debug.root, &asus->debug.dev_id);
2105         if (!dent)
2106                 goto error_debugfs;
2107
2108         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
2109                                   asus->debug.root, &asus->debug.ctrl_param);
2110         if (!dent)
2111                 goto error_debugfs;
2112
2113         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
2114                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
2115
2116                 node->asus = asus;
2117                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
2118                                            asus->debug.root, node,
2119                                            &asus_wmi_debugfs_io_ops);
2120                 if (!dent) {
2121                         pr_err("failed to create debug file: %s\n", node->name);
2122                         goto error_debugfs;
2123                 }
2124         }
2125
2126         return 0;
2127
2128 error_debugfs:
2129         asus_wmi_debugfs_exit(asus);
2130         return -ENOMEM;
2131 }
2132
2133 static int asus_wmi_fan_init(struct asus_wmi *asus)
2134 {
2135         int status;
2136
2137         asus->asus_hwmon_pwm = -1;
2138         asus->asus_hwmon_num_fans = -1;
2139         asus->asus_hwmon_fan_manual_mode = false;
2140
2141         status = asus_hwmon_get_fan_number(asus, &asus->asus_hwmon_num_fans);
2142         if (status) {
2143                 asus->asus_hwmon_num_fans = 0;
2144                 pr_warn("Could not determine number of fans: %d\n", status);
2145                 return -ENXIO;
2146         }
2147
2148         pr_info("Number of fans: %d\n", asus->asus_hwmon_num_fans);
2149         return 0;
2150 }
2151
2152 /*
2153  * WMI Driver
2154  */
2155 static int asus_wmi_add(struct platform_device *pdev)
2156 {
2157         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2158         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2159         struct asus_wmi *asus;
2160         const char *chassis_type;
2161         acpi_status status;
2162         int err;
2163         u32 result;
2164
2165         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
2166         if (!asus)
2167                 return -ENOMEM;
2168
2169         asus->driver = wdrv;
2170         asus->platform_device = pdev;
2171         wdrv->platform_device = pdev;
2172         platform_set_drvdata(asus->platform_device, asus);
2173
2174         if (wdrv->detect_quirks)
2175                 wdrv->detect_quirks(asus->driver);
2176
2177         err = asus_wmi_platform_init(asus);
2178         if (err)
2179                 goto fail_platform;
2180
2181         err = asus_wmi_input_init(asus);
2182         if (err)
2183                 goto fail_input;
2184
2185         err = asus_wmi_fan_init(asus); /* probably no problems on error */
2186         asus_hwmon_fan_set_auto(asus);
2187
2188         err = asus_wmi_hwmon_init(asus);
2189         if (err)
2190                 goto fail_hwmon;
2191
2192         err = asus_wmi_led_init(asus);
2193         if (err)
2194                 goto fail_leds;
2195
2196         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
2197         if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
2198                 asus->driver->wlan_ctrl_by_user = 1;
2199
2200         if (!(asus->driver->wlan_ctrl_by_user && ashs_present())) {
2201                 err = asus_wmi_rfkill_init(asus);
2202                 if (err)
2203                         goto fail_rfkill;
2204         }
2205
2206         if (asus->driver->quirks->wmi_force_als_set)
2207                 asus_wmi_set_als();
2208
2209         /* Some Asus desktop boards export an acpi-video backlight interface,
2210            stop this from showing up */
2211         chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
2212         if (chassis_type && !strcmp(chassis_type, "3"))
2213                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2214
2215         if (asus->driver->quirks->wmi_backlight_power)
2216                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2217
2218         if (asus->driver->quirks->wmi_backlight_native)
2219                 acpi_video_set_dmi_backlight_type(acpi_backlight_native);
2220
2221         if (asus->driver->quirks->xusb2pr)
2222                 asus_wmi_set_xusb2pr(asus);
2223
2224         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
2225                 err = asus_wmi_backlight_init(asus);
2226                 if (err && err != -ENODEV)
2227                         goto fail_backlight;
2228         } else if (asus->driver->quirks->wmi_backlight_set_devstate)
2229                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 2, NULL);
2230
2231         status = wmi_install_notify_handler(asus->driver->event_guid,
2232                                             asus_wmi_notify, asus);
2233         if (ACPI_FAILURE(status)) {
2234                 pr_err("Unable to register notify handler - %d\n", status);
2235                 err = -ENODEV;
2236                 goto fail_wmi_handler;
2237         }
2238
2239         err = asus_wmi_debugfs_init(asus);
2240         if (err)
2241                 goto fail_debugfs;
2242
2243         return 0;
2244
2245 fail_debugfs:
2246         wmi_remove_notify_handler(asus->driver->event_guid);
2247 fail_wmi_handler:
2248         asus_wmi_backlight_exit(asus);
2249 fail_backlight:
2250         asus_wmi_rfkill_exit(asus);
2251 fail_rfkill:
2252         asus_wmi_led_exit(asus);
2253 fail_leds:
2254 fail_hwmon:
2255         asus_wmi_input_exit(asus);
2256 fail_input:
2257         asus_wmi_platform_exit(asus);
2258 fail_platform:
2259         kfree(asus);
2260         return err;
2261 }
2262
2263 static int asus_wmi_remove(struct platform_device *device)
2264 {
2265         struct asus_wmi *asus;
2266
2267         asus = platform_get_drvdata(device);
2268         wmi_remove_notify_handler(asus->driver->event_guid);
2269         asus_wmi_backlight_exit(asus);
2270         asus_wmi_input_exit(asus);
2271         asus_wmi_led_exit(asus);
2272         asus_wmi_rfkill_exit(asus);
2273         asus_wmi_debugfs_exit(asus);
2274         asus_wmi_platform_exit(asus);
2275         asus_hwmon_fan_set_auto(asus);
2276
2277         kfree(asus);
2278         return 0;
2279 }
2280
2281 /*
2282  * Platform driver - hibernate/resume callbacks
2283  */
2284 static int asus_hotk_thaw(struct device *device)
2285 {
2286         struct asus_wmi *asus = dev_get_drvdata(device);
2287
2288         if (asus->wlan.rfkill) {
2289                 bool wlan;
2290
2291                 /*
2292                  * Work around bios bug - acpi _PTS turns off the wireless led
2293                  * during suspend.  Normally it restores it on resume, but
2294                  * we should kick it ourselves in case hibernation is aborted.
2295                  */
2296                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
2297                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
2298         }
2299
2300         return 0;
2301 }
2302
2303 static int asus_hotk_resume(struct device *device)
2304 {
2305         struct asus_wmi *asus = dev_get_drvdata(device);
2306
2307         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2308                 queue_work(asus->led_workqueue, &asus->kbd_led_work);
2309
2310         return 0;
2311 }
2312
2313 static int asus_hotk_restore(struct device *device)
2314 {
2315         struct asus_wmi *asus = dev_get_drvdata(device);
2316         int bl;
2317
2318         /* Refresh both wlan rfkill state and pci hotplug */
2319         if (asus->wlan.rfkill)
2320                 asus_rfkill_hotplug(asus);
2321
2322         if (asus->bluetooth.rfkill) {
2323                 bl = !asus_wmi_get_devstate_simple(asus,
2324                                                    ASUS_WMI_DEVID_BLUETOOTH);
2325                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
2326         }
2327         if (asus->wimax.rfkill) {
2328                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
2329                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
2330         }
2331         if (asus->wwan3g.rfkill) {
2332                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
2333                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
2334         }
2335         if (asus->gps.rfkill) {
2336                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
2337                 rfkill_set_sw_state(asus->gps.rfkill, bl);
2338         }
2339         if (asus->uwb.rfkill) {
2340                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
2341                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
2342         }
2343         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2344                 queue_work(asus->led_workqueue, &asus->kbd_led_work);
2345
2346         return 0;
2347 }
2348
2349 static const struct dev_pm_ops asus_pm_ops = {
2350         .thaw = asus_hotk_thaw,
2351         .restore = asus_hotk_restore,
2352         .resume = asus_hotk_resume,
2353 };
2354
2355 static int asus_wmi_probe(struct platform_device *pdev)
2356 {
2357         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2358         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2359         int ret;
2360
2361         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
2362                 pr_warn("Management GUID not found\n");
2363                 return -ENODEV;
2364         }
2365
2366         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
2367                 pr_warn("Event GUID not found\n");
2368                 return -ENODEV;
2369         }
2370
2371         if (wdrv->probe) {
2372                 ret = wdrv->probe(pdev);
2373                 if (ret)
2374                         return ret;
2375         }
2376
2377         return asus_wmi_add(pdev);
2378 }
2379
2380 static bool used;
2381
2382 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
2383 {
2384         struct platform_driver *platform_driver;
2385         struct platform_device *platform_device;
2386
2387         if (used)
2388                 return -EBUSY;
2389
2390         platform_driver = &driver->platform_driver;
2391         platform_driver->remove = asus_wmi_remove;
2392         platform_driver->driver.owner = driver->owner;
2393         platform_driver->driver.name = driver->name;
2394         platform_driver->driver.pm = &asus_pm_ops;
2395
2396         platform_device = platform_create_bundle(platform_driver,
2397                                                  asus_wmi_probe,
2398                                                  NULL, 0, NULL, 0);
2399         if (IS_ERR(platform_device))
2400                 return PTR_ERR(platform_device);
2401
2402         used = true;
2403         return 0;
2404 }
2405 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
2406
2407 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
2408 {
2409         platform_device_unregister(driver->platform_device);
2410         platform_driver_unregister(&driver->platform_driver);
2411         used = false;
2412 }
2413 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
2414
2415 static int __init asus_wmi_init(void)
2416 {
2417         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
2418                 pr_info("Asus Management GUID not found\n");
2419                 return -ENODEV;
2420         }
2421
2422         pr_info("ASUS WMI generic driver loaded\n");
2423         return 0;
2424 }
2425
2426 static void __exit asus_wmi_exit(void)
2427 {
2428         pr_info("ASUS WMI generic driver unloaded\n");
2429 }
2430
2431 module_init(asus_wmi_init);
2432 module_exit(asus_wmi_exit);