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