drivers/platform/x86/asus-wmi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Asus PC WMI hotkey driver
   4  *
   5  * Copyright(C) 2010 Intel Corporation.
   6  * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
   7  *
   8  * Portions based on wistron_btns.c:
   9  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
  10  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  11  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/types.h>
  20 #include <linux/slab.h>
  21 #include <linux/input.h>
  22 #include <linux/input/sparse-keymap.h>
  23 #include <linux/fb.h>
  24 #include <linux/backlight.h>
  25 #include <linux/leds.h>
  26 #include <linux/rfkill.h>
  27 #include <linux/pci.h>
  28 #include <linux/pci_hotplug.h>
  29 #include <linux/power_supply.h>
  30 #include <linux/hwmon.h>
  31 #include <linux/hwmon-sysfs.h>
  32 #include <linux/debugfs.h>
  33 #include <linux/seq_file.h>
  34 #include <linux/platform_data/x86/asus-wmi.h>
  35 #include <linux/platform_device.h>
  36 #include <linux/acpi.h>
  37 #include <linux/dmi.h>
  38 #include <linux/units.h>
  39
  40 #include <acpi/battery.h>
  41 #include <acpi/video.h>
  42
  43 #include "asus-wmi.h"
  44
  45 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
  46               "Yong Wang <yong.y.wang@intel.com>");
  47 MODULE_DESCRIPTION("Asus Generic WMI Driver");
  48 MODULE_LICENSE("GPL");
  49
  50 #define to_asus_wmi_driver(pdrv)                                        \
  51         (container_of((pdrv), struct asus_wmi_driver, platform_driver))
  52
  53 #define ASUS_WMI_MGMT_GUID      "97845ED0-4E6D-11DE-8A39-0800200C9A66"
  54
  55 #define NOTIFY_BRNUP_MIN                0x11
  56 #define NOTIFY_BRNUP_MAX                0x1f
  57 #define NOTIFY_BRNDOWN_MIN              0x20
  58 #define NOTIFY_BRNDOWN_MAX              0x2e
  59 #define NOTIFY_FNLOCK_TOGGLE            0x4e
  60 #define NOTIFY_KBD_DOCK_CHANGE          0x75
  61 #define NOTIFY_KBD_BRTUP                0xc4
  62 #define NOTIFY_KBD_BRTDWN               0xc5
  63 #define NOTIFY_KBD_BRTTOGGLE            0xc7
  64 #define NOTIFY_KBD_FBM                  0x99
  65 #define NOTIFY_KBD_TTP                  0xae
  66
  67 #define ASUS_WMI_FNLOCK_BIOS_DISABLED   BIT(0)
  68
  69 #define ASUS_FAN_DESC                   "cpu_fan"
  70 #define ASUS_FAN_MFUN                   0x13
  71 #define ASUS_FAN_SFUN_READ              0x06
  72 #define ASUS_FAN_SFUN_WRITE             0x07
  73
  74 /* Based on standard hwmon pwmX_enable values */
  75 #define ASUS_FAN_CTRL_FULLSPEED         0
  76 #define ASUS_FAN_CTRL_MANUAL            1
  77 #define ASUS_FAN_CTRL_AUTO              2
  78
  79 #define ASUS_FAN_BOOST_MODE_NORMAL              0
  80 #define ASUS_FAN_BOOST_MODE_OVERBOOST           1
  81 #define ASUS_FAN_BOOST_MODE_OVERBOOST_MASK      0x01
  82 #define ASUS_FAN_BOOST_MODE_SILENT              2
  83 #define ASUS_FAN_BOOST_MODE_SILENT_MASK         0x02
  84 #define ASUS_FAN_BOOST_MODES_MASK               0x03
  85
  86 #define ASUS_THROTTLE_THERMAL_POLICY_DEFAULT    0
  87 #define ASUS_THROTTLE_THERMAL_POLICY_OVERBOOST  1
  88 #define ASUS_THROTTLE_THERMAL_POLICY_SILENT     2
  89
  90 #define USB_INTEL_XUSB2PR               0xD0
  91 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI   0x9c31
  92
  93 #define ASUS_ACPI_UID_ASUSWMI           "ASUSWMI"
  94 #define ASUS_ACPI_UID_ATK               "ATK"
  95
  96 #define WMI_EVENT_QUEUE_SIZE            0x10
  97 #define WMI_EVENT_QUEUE_END             0x1
  98 #define WMI_EVENT_MASK                  0xFFFF
  99 /* The WMI hotkey event value is always the same. */
 100 #define WMI_EVENT_VALUE_ATK             0xFF
 101
 102 #define WMI_EVENT_MASK                  0xFFFF
 103
 104 static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
 105
 106 static bool ashs_present(void)
 107 {
 108         int i = 0;
 109         while (ashs_ids[i]) {
 110                 if (acpi_dev_found(ashs_ids[i++]))
 111                         return true;
 112         }
 113         return false;
 114 }
 115
 116 struct bios_args {
 117         u32 arg0;
 118         u32 arg1;
 119         u32 arg2; /* At least TUF Gaming series uses 3 dword input buffer. */
 120         u32 arg4;
 121         u32 arg5;
 122 } __packed;
 123
 124 /*
 125  * Struct that's used for all methods called via AGFN. Naming is
 126  * identically to the AML code.
 127  */
 128 struct agfn_args {
 129         u16 mfun; /* probably "Multi-function" to be called */
 130         u16 sfun; /* probably "Sub-function" to be called */
 131         u16 len;  /* size of the hole struct, including subfunction fields */
 132         u8 stas;  /* not used by now */
 133         u8 err;   /* zero on success */
 134 } __packed;
 135
 136 /* struct used for calling fan read and write methods */
 137 struct agfn_fan_args {
 138         struct agfn_args agfn;  /* common fields */
 139         u8 fan;                 /* fan number: 0: set auto mode 1: 1st fan */
 140         u32 speed;              /* read: RPM/100 - write: 0-255 */
 141 } __packed;
 142
 143 /*
 144  * <platform>/    - debugfs root directory
 145  *   dev_id      - current dev_id
 146  *   ctrl_param  - current ctrl_param
 147  *   method_id   - current method_id
 148  *   devs        - call DEVS(dev_id, ctrl_param) and print result
 149  *   dsts        - call DSTS(dev_id)  and print result
 150  *   call        - call method_id(dev_id, ctrl_param) and print result
 151  */
 152 struct asus_wmi_debug {
 153         struct dentry *root;
 154         u32 method_id;
 155         u32 dev_id;
 156         u32 ctrl_param;
 157 };
 158
 159 struct asus_rfkill {
 160         struct asus_wmi *asus;
 161         struct rfkill *rfkill;
 162         u32 dev_id;
 163 };
 164
 165 enum fan_type {
 166         FAN_TYPE_NONE = 0,
 167         FAN_TYPE_AGFN,          /* deprecated on newer platforms */
 168         FAN_TYPE_SPEC83,        /* starting in Spec 8.3, use CPU_FAN_CTRL */
 169 };
 170
 171 struct asus_wmi {
 172         int dsts_id;
 173         int spec;
 174         int sfun;
 175         bool wmi_event_queue;
 176
 177         struct input_dev *inputdev;
 178         struct backlight_device *backlight_device;
 179         struct platform_device *platform_device;
 180
 181         struct led_classdev wlan_led;
 182         int wlan_led_wk;
 183         struct led_classdev tpd_led;
 184         int tpd_led_wk;
 185         struct led_classdev kbd_led;
 186         int kbd_led_wk;
 187         struct led_classdev lightbar_led;
 188         int lightbar_led_wk;
 189         struct workqueue_struct *led_workqueue;
 190         struct work_struct tpd_led_work;
 191         struct work_struct wlan_led_work;
 192         struct work_struct lightbar_led_work;
 193
 194         struct asus_rfkill wlan;
 195         struct asus_rfkill bluetooth;
 196         struct asus_rfkill wimax;
 197         struct asus_rfkill wwan3g;
 198         struct asus_rfkill gps;
 199         struct asus_rfkill uwb;
 200
 201         enum fan_type fan_type;
 202         int fan_pwm_mode;
 203         int agfn_pwm;
 204
 205         bool fan_boost_mode_available;
 206         u8 fan_boost_mode_mask;
 207         u8 fan_boost_mode;
 208
 209         bool throttle_thermal_policy_available;
 210         u8 throttle_thermal_policy_mode;
 211
 212         // The RSOC controls the maximum charging percentage.
 213         bool battery_rsoc_available;
 214
 215         struct hotplug_slot hotplug_slot;
 216         struct mutex hotplug_lock;
 217         struct mutex wmi_lock;
 218         struct workqueue_struct *hotplug_workqueue;
 219         struct work_struct hotplug_work;
 220
 221         bool fnlock_locked;
 222
 223         struct asus_wmi_debug debug;
 224
 225         struct asus_wmi_driver *driver;
 226 };
 227
 228 /* WMI ************************************************************************/
 229
 230 static int asus_wmi_evaluate_method3(u32 method_id,
 231                 u32 arg0, u32 arg1, u32 arg2, u32 *retval)
 232 {
 233         struct bios_args args = {
 234                 .arg0 = arg0,
 235                 .arg1 = arg1,
 236                 .arg2 = arg2,
 237         };
 238         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
 239         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 240         acpi_status status;
 241         union acpi_object *obj;
 242         u32 tmp = 0;
 243
 244         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
 245                                      &input, &output);
 246
 247         if (ACPI_FAILURE(status))
 248                 return -EIO;
 249
 250         obj = (union acpi_object *)output.pointer;
 251         if (obj && obj->type == ACPI_TYPE_INTEGER)
 252                 tmp = (u32) obj->integer.value;
 253
 254         if (retval)
 255                 *retval = tmp;
 256
 257         kfree(obj);
 258
 259         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
 260                 return -ENODEV;
 261
 262         return 0;
 263 }
 264
 265 int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval)
 266 {
 267         return asus_wmi_evaluate_method3(method_id, arg0, arg1, 0, retval);
 268 }
 269 EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);
 270
 271 static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
 272 {
 273         struct acpi_buffer input;
 274         u64 phys_addr;
 275         u32 retval;
 276         u32 status;
 277
 278         /*
 279          * Copy to dma capable address otherwise memory corruption occurs as
 280          * bios has to be able to access it.
 281          */
 282         input.pointer = kmemdup(args.pointer, args.length, GFP_DMA | GFP_KERNEL);
 283         input.length = args.length;
 284         if (!input.pointer)
 285                 return -ENOMEM;
 286         phys_addr = virt_to_phys(input.pointer);
 287
 288         status = asus_wmi_evaluate_method(ASUS_WMI_METHODID_AGFN,
 289                                         phys_addr, 0, &retval);
 290         if (!status)
 291                 memcpy(args.pointer, input.pointer, args.length);
 292
 293         kfree(input.pointer);
 294         if (status)
 295                 return -ENXIO;
 296
 297         return retval;
 298 }
 299
 300 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 301 {
 302         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
 303 }
 304
 305 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 306                                  u32 *retval)
 307 {
 308         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 309                                         ctrl_param, retval);
 310 }
 311
 312 /* Helper for special devices with magic return codes */
 313 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
 314                                       u32 dev_id, u32 mask)
 315 {
 316         u32 retval = 0;
 317         int err;
 318
 319         err = asus_wmi_get_devstate(asus, dev_id, &retval);
 320         if (err < 0)
 321                 return err;
 322
 323         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
 324                 return -ENODEV;
 325
 326         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
 327                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
 328                         return -ENODEV;
 329         }
 330
 331         return retval & mask;
 332 }
 333
 334 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
 335 {
 336         return asus_wmi_get_devstate_bits(asus, dev_id,
 337                                           ASUS_WMI_DSTS_STATUS_BIT);
 338 }
 339
 340 static bool asus_wmi_dev_is_present(struct asus_wmi *asus, u32 dev_id)
 341 {
 342         u32 retval;
 343         int status = asus_wmi_get_devstate(asus, dev_id, &retval);
 344
 345         return status == 0 && (retval & ASUS_WMI_DSTS_PRESENCE_BIT);
 346 }
 347
 348 /* Input **********************************************************************/
 349
 350 static int asus_wmi_input_init(struct asus_wmi *asus)
 351 {
 352         int err, result;
 353
 354         asus->inputdev = input_allocate_device();
 355         if (!asus->inputdev)
 356                 return -ENOMEM;
 357
 358         asus->inputdev->name = asus->driver->input_name;
 359         asus->inputdev->phys = asus->driver->input_phys;
 360         asus->inputdev->id.bustype = BUS_HOST;
 361         asus->inputdev->dev.parent = &asus->platform_device->dev;
 362         set_bit(EV_REP, asus->inputdev->evbit);
 363
 364         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
 365         if (err)
 366                 goto err_free_dev;
 367
 368         result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_KBD_DOCK);
 369         if (result >= 0) {
 370                 input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
 371                 input_report_switch(asus->inputdev, SW_TABLET_MODE, !result);
 372         } else if (result != -ENODEV) {
 373                 pr_err("Error checking for keyboard-dock: %d\n", result);
 374         }
 375
 376         err = input_register_device(asus->inputdev);
 377         if (err)
 378                 goto err_free_dev;
 379
 380         return 0;
 381
 382 err_free_dev:
 383         input_free_device(asus->inputdev);
 384         return err;
 385 }
 386
 387 static void asus_wmi_input_exit(struct asus_wmi *asus)
 388 {
 389         if (asus->inputdev)
 390                 input_unregister_device(asus->inputdev);
 391
 392         asus->inputdev = NULL;
 393 }
 394
 395 /* Battery ********************************************************************/
 396
 397 /* The battery maximum charging percentage */
 398 static int charge_end_threshold;
 399
 400 static ssize_t charge_control_end_threshold_store(struct device *dev,
 401                                                   struct device_attribute *attr,
 402                                                   const char *buf, size_t count)
 403 {
 404         int value, ret, rv;
 405
 406         ret = kstrtouint(buf, 10, &value);
 407         if (ret)
 408                 return ret;
 409
 410         if (value < 0 || value > 100)
 411                 return -EINVAL;
 412
 413         ret = asus_wmi_set_devstate(ASUS_WMI_DEVID_RSOC, value, &rv);
 414         if (ret)
 415                 return ret;
 416
 417         if (rv != 1)
 418                 return -EIO;
 419
 420         /* There isn't any method in the DSDT to read the threshold, so we
 421          * save the threshold.
 422          */
 423         charge_end_threshold = value;
 424         return count;
 425 }
 426
 427 static ssize_t charge_control_end_threshold_show(struct device *device,
 428                                                  struct device_attribute *attr,
 429                                                  char *buf)
 430 {
 431         return sprintf(buf, "%d\n", charge_end_threshold);
 432 }
 433
 434 static DEVICE_ATTR_RW(charge_control_end_threshold);
 435
 436 static int asus_wmi_battery_add(struct power_supply *battery)
 437 {
 438         /* The WMI method does not provide a way to specific a battery, so we
 439          * just assume it is the first battery.
 440          * Note: On some newer ASUS laptops (Zenbook UM431DA), the primary/first
 441          * battery is named BATT.
 442          */
 443         if (strcmp(battery->desc->name, "BAT0") != 0 &&
 444             strcmp(battery->desc->name, "BAT1") != 0 &&
 445             strcmp(battery->desc->name, "BATT") != 0)
 446                 return -ENODEV;
 447
 448         if (device_create_file(&battery->dev,
 449             &dev_attr_charge_control_end_threshold))
 450                 return -ENODEV;
 451
 452         /* The charge threshold is only reset when the system is power cycled,
 453          * and we can't get the current threshold so let set it to 100% when
 454          * a battery is added.
 455          */
 456         asus_wmi_set_devstate(ASUS_WMI_DEVID_RSOC, 100, NULL);
 457         charge_end_threshold = 100;
 458
 459         return 0;
 460 }
 461
 462 static int asus_wmi_battery_remove(struct power_supply *battery)
 463 {
 464         device_remove_file(&battery->dev,
 465                            &dev_attr_charge_control_end_threshold);
 466         return 0;
 467 }
 468
 469 static struct acpi_battery_hook battery_hook = {
 470         .add_battery = asus_wmi_battery_add,
 471         .remove_battery = asus_wmi_battery_remove,
 472         .name = "ASUS Battery Extension",
 473 };
 474
 475 static void asus_wmi_battery_init(struct asus_wmi *asus)
 476 {
 477         asus->battery_rsoc_available = false;
 478         if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_RSOC)) {
 479                 asus->battery_rsoc_available = true;
 480                 battery_hook_register(&battery_hook);
 481         }
 482 }
 483
 484 static void asus_wmi_battery_exit(struct asus_wmi *asus)
 485 {
 486         if (asus->battery_rsoc_available)
 487                 battery_hook_unregister(&battery_hook);
 488 }
 489
 490 /* LEDs ***********************************************************************/
 491
 492 /*
 493  * These functions actually update the LED's, and are called from a
 494  * workqueue. By doing this as separate work rather than when the LED
 495  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 496  * potentially bad time, such as a timer interrupt.
 497  */
 498 static void tpd_led_update(struct work_struct *work)
 499 {
 500         int ctrl_param;
 501         struct asus_wmi *asus;
 502
 503         asus = container_of(work, struct asus_wmi, tpd_led_work);
 504
 505         ctrl_param = asus->tpd_led_wk;
 506         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
 507 }
 508
 509 static void tpd_led_set(struct led_classdev *led_cdev,
 510                         enum led_brightness value)
 511 {
 512         struct asus_wmi *asus;
 513
 514         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 515
 516         asus->tpd_led_wk = !!value;
 517         queue_work(asus->led_workqueue, &asus->tpd_led_work);
 518 }
 519
 520 static int read_tpd_led_state(struct asus_wmi *asus)
 521 {
 522         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
 523 }
 524
 525 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 526 {
 527         struct asus_wmi *asus;
 528
 529         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 530
 531         return read_tpd_led_state(asus);
 532 }
 533
 534 static void kbd_led_update(struct asus_wmi *asus)
 535 {
 536         int ctrl_param = 0;
 537
 538         ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
 539         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
 540 }
 541
 542 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 543 {
 544         int retval;
 545
 546         /*
 547          * bits 0-2: level
 548          * bit 7: light on/off
 549          * bit 8-10: environment (0: dark, 1: normal, 2: light)
 550          * bit 17: status unknown
 551          */
 552         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
 553                                             0xFFFF);
 554
 555         /* Unknown status is considered as off */
 556         if (retval == 0x8000)
 557                 retval = 0;
 558
 559         if (retval < 0)
 560                 return retval;
 561
 562         if (level)
 563                 *level = retval & 0x7F;
 564         if (env)
 565                 *env = (retval >> 8) & 0x7F;
 566         return 0;
 567 }
 568
 569 static void do_kbd_led_set(struct led_classdev *led_cdev, int value)
 570 {
 571         struct asus_wmi *asus;
 572         int max_level;
 573
 574         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 575         max_level = asus->kbd_led.max_brightness;
 576
 577         asus->kbd_led_wk = clamp_val(value, 0, max_level);
 578         kbd_led_update(asus);
 579 }
 580
 581 static void kbd_led_set(struct led_classdev *led_cdev,
 582                         enum led_brightness value)
 583 {
 584         /* Prevent disabling keyboard backlight on module unregister */
 585         if (led_cdev->flags & LED_UNREGISTERING)
 586                 return;
 587
 588         do_kbd_led_set(led_cdev, value);
 589 }
 590
 591 static void kbd_led_set_by_kbd(struct asus_wmi *asus, enum led_brightness value)
 592 {
 593         struct led_classdev *led_cdev = &asus->kbd_led;
 594
 595         do_kbd_led_set(led_cdev, value);
 596         led_classdev_notify_brightness_hw_changed(led_cdev, asus->kbd_led_wk);
 597 }
 598
 599 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
 600 {
 601         struct asus_wmi *asus;
 602         int retval, value;
 603
 604         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 605
 606         retval = kbd_led_read(asus, &value, NULL);
 607         if (retval < 0)
 608                 return retval;
 609
 610         return value;
 611 }
 612
 613 static int wlan_led_unknown_state(struct asus_wmi *asus)
 614 {
 615         u32 result;
 616
 617         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 618
 619         return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
 620 }
 621
 622 static void wlan_led_update(struct work_struct *work)
 623 {
 624         int ctrl_param;
 625         struct asus_wmi *asus;
 626
 627         asus = container_of(work, struct asus_wmi, wlan_led_work);
 628
 629         ctrl_param = asus->wlan_led_wk;
 630         asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
 631 }
 632
 633 static void wlan_led_set(struct led_classdev *led_cdev,
 634                          enum led_brightness value)
 635 {
 636         struct asus_wmi *asus;
 637
 638         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 639
 640         asus->wlan_led_wk = !!value;
 641         queue_work(asus->led_workqueue, &asus->wlan_led_work);
 642 }
 643
 644 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
 645 {
 646         struct asus_wmi *asus;
 647         u32 result;
 648
 649         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
 650         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
 651
 652         return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
 653 }
 654
 655 static void lightbar_led_update(struct work_struct *work)
 656 {
 657         struct asus_wmi *asus;
 658         int ctrl_param;
 659
 660         asus = container_of(work, struct asus_wmi, lightbar_led_work);
 661
 662         ctrl_param = asus->lightbar_led_wk;
 663         asus_wmi_set_devstate(ASUS_WMI_DEVID_LIGHTBAR, ctrl_param, NULL);
 664 }
 665
 666 static void lightbar_led_set(struct led_classdev *led_cdev,
 667                              enum led_brightness value)
 668 {
 669         struct asus_wmi *asus;
 670
 671         asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
 672
 673         asus->lightbar_led_wk = !!value;
 674         queue_work(asus->led_workqueue, &asus->lightbar_led_work);
 675 }
 676
 677 static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
 678 {
 679         struct asus_wmi *asus;
 680         u32 result;
 681
 682         asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
 683         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
 684
 685         return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
 686 }
 687
 688 static void asus_wmi_led_exit(struct asus_wmi *asus)
 689 {
 690         led_classdev_unregister(&asus->kbd_led);
 691         led_classdev_unregister(&asus->tpd_led);
 692         led_classdev_unregister(&asus->wlan_led);
 693         led_classdev_unregister(&asus->lightbar_led);
 694
 695         if (asus->led_workqueue)
 696                 destroy_workqueue(asus->led_workqueue);
 697 }
 698
 699 static int asus_wmi_led_init(struct asus_wmi *asus)
 700 {
 701         int rv = 0, led_val;
 702
 703         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 704         if (!asus->led_workqueue)
 705                 return -ENOMEM;
 706
 707         if (read_tpd_led_state(asus) >= 0) {
 708                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 709
 710                 asus->tpd_led.name = "asus::touchpad";
 711                 asus->tpd_led.brightness_set = tpd_led_set;
 712                 asus->tpd_led.brightness_get = tpd_led_get;
 713                 asus->tpd_led.max_brightness = 1;
 714
 715                 rv = led_classdev_register(&asus->platform_device->dev,
 716                                            &asus->tpd_led);
 717                 if (rv)
 718                         goto error;
 719         }
 720
 721         if (!kbd_led_read(asus, &led_val, NULL)) {
 722                 asus->kbd_led_wk = led_val;
 723                 asus->kbd_led.name = "asus::kbd_backlight";
 724                 asus->kbd_led.flags = LED_BRIGHT_HW_CHANGED;
 725                 asus->kbd_led.brightness_set = kbd_led_set;
 726                 asus->kbd_led.brightness_get = kbd_led_get;
 727                 asus->kbd_led.max_brightness = 3;
 728
 729                 rv = led_classdev_register(&asus->platform_device->dev,
 730                                            &asus->kbd_led);
 731                 if (rv)
 732                         goto error;
 733         }
 734
 735         if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_WIRELESS_LED)
 736                         && (asus->driver->quirks->wapf > 0)) {
 737                 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
 738
 739                 asus->wlan_led.name = "asus::wlan";
 740                 asus->wlan_led.brightness_set = wlan_led_set;
 741                 if (!wlan_led_unknown_state(asus))
 742                         asus->wlan_led.brightness_get = wlan_led_get;
 743                 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
 744                 asus->wlan_led.max_brightness = 1;
 745                 asus->wlan_led.default_trigger = "asus-wlan";
 746
 747                 rv = led_classdev_register(&asus->platform_device->dev,
 748                                            &asus->wlan_led);
 749                 if (rv)
 750                         goto error;
 751         }
 752
 753         if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_LIGHTBAR)) {
 754                 INIT_WORK(&asus->lightbar_led_work, lightbar_led_update);
 755
 756                 asus->lightbar_led.name = "asus::lightbar";
 757                 asus->lightbar_led.brightness_set = lightbar_led_set;
 758                 asus->lightbar_led.brightness_get = lightbar_led_get;
 759                 asus->lightbar_led.max_brightness = 1;
 760
 761                 rv = led_classdev_register(&asus->platform_device->dev,
 762                                            &asus->lightbar_led);
 763         }
 764
 765 error:
 766         if (rv)
 767                 asus_wmi_led_exit(asus);
 768
 769         return rv;
 770 }
 771
 772 /* RF *************************************************************************/
 773
 774 /*
 775  * PCI hotplug (for wlan rfkill)
 776  */
 777 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 778 {
 779         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 780
 781         if (result < 0)
 782                 return false;
 783         return !result;
 784 }
 785
 786 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 787 {
 788         struct pci_dev *dev;
 789         struct pci_bus *bus;
 790         bool blocked;
 791         bool absent;
 792         u32 l;
 793
 794         mutex_lock(&asus->wmi_lock);
 795         blocked = asus_wlan_rfkill_blocked(asus);
 796         mutex_unlock(&asus->wmi_lock);
 797
 798         mutex_lock(&asus->hotplug_lock);
 799         pci_lock_rescan_remove();
 800
 801         if (asus->wlan.rfkill)
 802                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 803
 804         if (asus->hotplug_slot.ops) {
 805                 bus = pci_find_bus(0, 1);
 806                 if (!bus) {
 807                         pr_warn("Unable to find PCI bus 1?\n");
 808                         goto out_unlock;
 809                 }
 810
 811                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 812                         pr_err("Unable to read PCI config space?\n");
 813                         goto out_unlock;
 814                 }
 815                 absent = (l == 0xffffffff);
 816
 817                 if (blocked != absent) {
 818                         pr_warn("BIOS says wireless lan is %s, "
 819                                 "but the pci device is %s\n",
 820                                 blocked ? "blocked" : "unblocked",
 821                                 absent ? "absent" : "present");
 822                         pr_warn("skipped wireless hotplug as probably "
 823                                 "inappropriate for this model\n");
 824                         goto out_unlock;
 825                 }
 826
 827                 if (!blocked) {
 828                         dev = pci_get_slot(bus, 0);
 829                         if (dev) {
 830                                 /* Device already present */
 831                                 pci_dev_put(dev);
 832                                 goto out_unlock;
 833                         }
 834                         dev = pci_scan_single_device(bus, 0);
 835                         if (dev) {
 836                                 pci_bus_assign_resources(bus);
 837                                 pci_bus_add_device(dev);
 838                         }
 839                 } else {
 840                         dev = pci_get_slot(bus, 0);
 841                         if (dev) {
 842                                 pci_stop_and_remove_bus_device(dev);
 843                                 pci_dev_put(dev);
 844                         }
 845                 }
 846         }
 847
 848 out_unlock:
 849         pci_unlock_rescan_remove();
 850         mutex_unlock(&asus->hotplug_lock);
 851 }
 852
 853 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
 854 {
 855         struct asus_wmi *asus = data;
 856
 857         if (event != ACPI_NOTIFY_BUS_CHECK)
 858                 return;
 859
 860         /*
 861          * We can't call directly asus_rfkill_hotplug because most
 862          * of the time WMBC is still being executed and not reetrant.
 863          * There is currently no way to tell ACPICA that  we want this
 864          * method to be serialized, we schedule a asus_rfkill_hotplug
 865          * call later, in a safer context.
 866          */
 867         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
 868 }
 869
 870 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 871 {
 872         acpi_status status;
 873         acpi_handle handle;
 874
 875         status = acpi_get_handle(NULL, node, &handle);
 876         if (ACPI_FAILURE(status))
 877                 return -ENODEV;
 878
 879         status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
 880                                              asus_rfkill_notify, asus);
 881         if (ACPI_FAILURE(status))
 882                 pr_warn("Failed to register notify on %s\n", node);
 883
 884         return 0;
 885 }
 886
 887 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 888 {
 889         acpi_status status = AE_OK;
 890         acpi_handle handle;
 891
 892         status = acpi_get_handle(NULL, node, &handle);
 893         if (ACPI_FAILURE(status))
 894                 return;
 895
 896         status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
 897                                             asus_rfkill_notify);
 898         if (ACPI_FAILURE(status))
 899                 pr_err("Error removing rfkill notify handler %s\n", node);
 900 }
 901
 902 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
 903                                    u8 *value)
 904 {
 905         struct asus_wmi *asus = container_of(hotplug_slot,
 906                                              struct asus_wmi, hotplug_slot);
 907         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 908
 909         if (result < 0)
 910                 return result;
 911
 912         *value = !!result;
 913         return 0;
 914 }
 915
 916 static const struct hotplug_slot_ops asus_hotplug_slot_ops = {
 917         .get_adapter_status = asus_get_adapter_status,
 918         .get_power_status = asus_get_adapter_status,
 919 };
 920
 921 static void asus_hotplug_work(struct work_struct *work)
 922 {
 923         struct asus_wmi *asus;
 924
 925         asus = container_of(work, struct asus_wmi, hotplug_work);
 926         asus_rfkill_hotplug(asus);
 927 }
 928
 929 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
 930 {
 931         int ret = -ENOMEM;
 932         struct pci_bus *bus = pci_find_bus(0, 1);
 933
 934         if (!bus) {
 935                 pr_err("Unable to find wifi PCI bus\n");
 936                 return -ENODEV;
 937         }
 938
 939         asus->hotplug_workqueue =
 940             create_singlethread_workqueue("hotplug_workqueue");
 941         if (!asus->hotplug_workqueue)
 942                 goto error_workqueue;
 943
 944         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
 945
 946         asus->hotplug_slot.ops = &asus_hotplug_slot_ops;
 947
 948         ret = pci_hp_register(&asus->hotplug_slot, bus, 0, "asus-wifi");
 949         if (ret) {
 950                 pr_err("Unable to register hotplug slot - %d\n", ret);
 951                 goto error_register;
 952         }
 953
 954         return 0;
 955
 956 error_register:
 957         asus->hotplug_slot.ops = NULL;
 958         destroy_workqueue(asus->hotplug_workqueue);
 959 error_workqueue:
 960         return ret;
 961 }
 962
 963 /*
 964  * Rfkill devices
 965  */
 966 static int asus_rfkill_set(void *data, bool blocked)
 967 {
 968         struct asus_rfkill *priv = data;
 969         u32 ctrl_param = !blocked;
 970         u32 dev_id = priv->dev_id;
 971
 972         /*
 973          * If the user bit is set, BIOS can't set and record the wlan status,
 974          * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
 975          * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
 976          * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
 977          * while setting the wlan status through WMI.
 978          * This is also the behavior that windows app will do.
 979          */
 980         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 981              priv->asus->driver->wlan_ctrl_by_user)
 982                 dev_id = ASUS_WMI_DEVID_WLAN_LED;
 983
 984         return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
 985 }
 986
 987 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
 988 {
 989         struct asus_rfkill *priv = data;
 990         int result;
 991
 992         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
 993
 994         if (result < 0)
 995                 return;
 996
 997         rfkill_set_sw_state(priv->rfkill, !result);
 998 }
 999
1000 static int asus_rfkill_wlan_set(void *data, bool blocked)
1001 {
1002         struct asus_rfkill *priv = data;
1003         struct asus_wmi *asus = priv->asus;
1004         int ret;
1005
1006         /*
1007          * This handler is enabled only if hotplug is enabled.
1008          * In this case, the asus_wmi_set_devstate() will
1009          * trigger a wmi notification and we need to wait
1010          * this call to finish before being able to call
1011          * any wmi method
1012          */
1013         mutex_lock(&asus->wmi_lock);
1014         ret = asus_rfkill_set(data, blocked);
1015         mutex_unlock(&asus->wmi_lock);
1016         return ret;
1017 }
1018
1019 static const struct rfkill_ops asus_rfkill_wlan_ops = {
1020         .set_block = asus_rfkill_wlan_set,
1021         .query = asus_rfkill_query,
1022 };
1023
1024 static const struct rfkill_ops asus_rfkill_ops = {
1025         .set_block = asus_rfkill_set,
1026         .query = asus_rfkill_query,
1027 };
1028
1029 static int asus_new_rfkill(struct asus_wmi *asus,
1030                            struct asus_rfkill *arfkill,
1031                            const char *name, enum rfkill_type type, int dev_id)
1032 {
1033         int result = asus_wmi_get_devstate_simple(asus, dev_id);
1034         struct rfkill **rfkill = &arfkill->rfkill;
1035
1036         if (result < 0)
1037                 return result;
1038
1039         arfkill->dev_id = dev_id;
1040         arfkill->asus = asus;
1041
1042         if (dev_id == ASUS_WMI_DEVID_WLAN &&
1043             asus->driver->quirks->hotplug_wireless)
1044                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
1045                                        &asus_rfkill_wlan_ops, arfkill);
1046         else
1047                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
1048                                        &asus_rfkill_ops, arfkill);
1049
1050         if (!*rfkill)
1051                 return -EINVAL;
1052
1053         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
1054                         (asus->driver->quirks->wapf > 0))
1055                 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
1056
1057         rfkill_init_sw_state(*rfkill, !result);
1058         result = rfkill_register(*rfkill);
1059         if (result) {
1060                 rfkill_destroy(*rfkill);
1061                 *rfkill = NULL;
1062                 return result;
1063         }
1064         return 0;
1065 }
1066
1067 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
1068 {
1069         if (asus->driver->wlan_ctrl_by_user && ashs_present())
1070                 return;
1071
1072         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1073         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1074         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1075         if (asus->wlan.rfkill) {
1076                 rfkill_unregister(asus->wlan.rfkill);
1077                 rfkill_destroy(asus->wlan.rfkill);
1078                 asus->wlan.rfkill = NULL;
1079         }
1080         /*
1081          * Refresh pci hotplug in case the rfkill state was changed after
1082          * asus_unregister_rfkill_notifier()
1083          */
1084         asus_rfkill_hotplug(asus);
1085         if (asus->hotplug_slot.ops)
1086                 pci_hp_deregister(&asus->hotplug_slot);
1087         if (asus->hotplug_workqueue)
1088                 destroy_workqueue(asus->hotplug_workqueue);
1089
1090         if (asus->bluetooth.rfkill) {
1091                 rfkill_unregister(asus->bluetooth.rfkill);
1092                 rfkill_destroy(asus->bluetooth.rfkill);
1093                 asus->bluetooth.rfkill = NULL;
1094         }
1095         if (asus->wimax.rfkill) {
1096                 rfkill_unregister(asus->wimax.rfkill);
1097                 rfkill_destroy(asus->wimax.rfkill);
1098                 asus->wimax.rfkill = NULL;
1099         }
1100         if (asus->wwan3g.rfkill) {
1101                 rfkill_unregister(asus->wwan3g.rfkill);
1102                 rfkill_destroy(asus->wwan3g.rfkill);
1103                 asus->wwan3g.rfkill = NULL;
1104         }
1105         if (asus->gps.rfkill) {
1106                 rfkill_unregister(asus->gps.rfkill);
1107                 rfkill_destroy(asus->gps.rfkill);
1108                 asus->gps.rfkill = NULL;
1109         }
1110         if (asus->uwb.rfkill) {
1111                 rfkill_unregister(asus->uwb.rfkill);
1112                 rfkill_destroy(asus->uwb.rfkill);
1113                 asus->uwb.rfkill = NULL;
1114         }
1115 }
1116
1117 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
1118 {
1119         int result = 0;
1120
1121         mutex_init(&asus->hotplug_lock);
1122         mutex_init(&asus->wmi_lock);
1123
1124         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
1125                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
1126
1127         if (result && result != -ENODEV)
1128                 goto exit;
1129
1130         result = asus_new_rfkill(asus, &asus->bluetooth,
1131                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
1132                                  ASUS_WMI_DEVID_BLUETOOTH);
1133
1134         if (result && result != -ENODEV)
1135                 goto exit;
1136
1137         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
1138                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
1139
1140         if (result && result != -ENODEV)
1141                 goto exit;
1142
1143         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
1144                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
1145
1146         if (result && result != -ENODEV)
1147                 goto exit;
1148
1149         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
1150                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
1151
1152         if (result && result != -ENODEV)
1153                 goto exit;
1154
1155         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
1156                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
1157
1158         if (result && result != -ENODEV)
1159                 goto exit;
1160
1161         if (!asus->driver->quirks->hotplug_wireless)
1162                 goto exit;
1163
1164         result = asus_setup_pci_hotplug(asus);
1165         /*
1166          * If we get -EBUSY then something else is handling the PCI hotplug -
1167          * don't fail in this case
1168          */
1169         if (result == -EBUSY)
1170                 result = 0;
1171
1172         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1173         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1174         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1175         /*
1176          * Refresh pci hotplug in case the rfkill state was changed during
1177          * setup.
1178          */
1179         asus_rfkill_hotplug(asus);
1180
1181 exit:
1182         if (result && result != -ENODEV)
1183                 asus_wmi_rfkill_exit(asus);
1184
1185         if (result == -ENODEV)
1186                 result = 0;
1187
1188         return result;
1189 }
1190
1191 /* Quirks *********************************************************************/
1192
1193 static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
1194 {
1195         struct pci_dev *xhci_pdev;
1196         u32 orig_ports_available;
1197         u32 ports_available = asus->driver->quirks->xusb2pr;
1198
1199         xhci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
1200                         PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI,
1201                         NULL);
1202
1203         if (!xhci_pdev)
1204                 return;
1205
1206         pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1207                                 &orig_ports_available);
1208
1209         pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1210                                 cpu_to_le32(ports_available));
1211
1212         pr_info("set USB_INTEL_XUSB2PR old: 0x%04x, new: 0x%04x\n",
1213                         orig_ports_available, ports_available);
1214 }
1215
1216 /*
1217  * Some devices dont support or have borcken get_als method
1218  * but still support set method.
1219  */
1220 static void asus_wmi_set_als(void)
1221 {
1222         asus_wmi_set_devstate(ASUS_WMI_DEVID_ALS_ENABLE, 1, NULL);
1223 }
1224
1225 /* Hwmon device ***************************************************************/
1226
1227 static int asus_agfn_fan_speed_read(struct asus_wmi *asus, int fan,
1228                                           int *speed)
1229 {
1230         struct agfn_fan_args args = {
1231                 .agfn.len = sizeof(args),
1232                 .agfn.mfun = ASUS_FAN_MFUN,
1233                 .agfn.sfun = ASUS_FAN_SFUN_READ,
1234                 .fan = fan,
1235                 .speed = 0,
1236         };
1237         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1238         int status;
1239
1240         if (fan != 1)
1241                 return -EINVAL;
1242
1243         status = asus_wmi_evaluate_method_agfn(input);
1244
1245         if (status || args.agfn.err)
1246                 return -ENXIO;
1247
1248         if (speed)
1249                 *speed = args.speed;
1250
1251         return 0;
1252 }
1253
1254 static int asus_agfn_fan_speed_write(struct asus_wmi *asus, int fan,
1255                                      int *speed)
1256 {
1257         struct agfn_fan_args args = {
1258                 .agfn.len = sizeof(args),
1259                 .agfn.mfun = ASUS_FAN_MFUN,
1260                 .agfn.sfun = ASUS_FAN_SFUN_WRITE,
1261                 .fan = fan,
1262                 .speed = speed ?  *speed : 0,
1263         };
1264         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1265         int status;
1266
1267         /* 1: for setting 1st fan's speed 0: setting auto mode */
1268         if (fan != 1 && fan != 0)
1269                 return -EINVAL;
1270
1271         status = asus_wmi_evaluate_method_agfn(input);
1272
1273         if (status || args.agfn.err)
1274                 return -ENXIO;
1275
1276         if (speed && fan == 1)
1277                 asus->agfn_pwm = *speed;
1278
1279         return 0;
1280 }
1281
1282 /*
1283  * Check if we can read the speed of one fan. If true we assume we can also
1284  * control it.
1285  */
1286 static bool asus_wmi_has_agfn_fan(struct asus_wmi *asus)
1287 {
1288         int status;
1289         int speed;
1290         u32 value;
1291
1292         status = asus_agfn_fan_speed_read(asus, 1, &speed);
1293         if (status != 0)
1294                 return false;
1295
1296         status = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
1297         if (status != 0)
1298                 return false;
1299
1300         /*
1301          * We need to find a better way, probably using sfun,
1302          * bits or spec ...
1303          * Currently we disable it if:
1304          * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1305          * - reverved bits are non-zero
1306          * - sfun and presence bit are not set
1307          */
1308         return !(value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1309                  || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)));
1310 }
1311
1312 static int asus_fan_set_auto(struct asus_wmi *asus)
1313 {
1314         int status;
1315         u32 retval;
1316
1317         switch (asus->fan_type) {
1318         case FAN_TYPE_SPEC83:
1319                 status = asus_wmi_set_devstate(ASUS_WMI_DEVID_CPU_FAN_CTRL,
1320                                                0, &retval);
1321                 if (status)
1322                         return status;
1323
1324                 if (retval != 1)
1325                         return -EIO;
1326                 break;
1327
1328         case FAN_TYPE_AGFN:
1329                 status = asus_agfn_fan_speed_write(asus, 0, NULL);
1330                 if (status)
1331                         return -ENXIO;
1332                 break;
1333
1334         default:
1335                 return -ENXIO;
1336         }
1337
1338
1339         return 0;
1340 }
1341
1342 static ssize_t pwm1_show(struct device *dev,
1343                                struct device_attribute *attr,
1344                                char *buf)
1345 {
1346         struct asus_wmi *asus = dev_get_drvdata(dev);
1347         int err;
1348         int value;
1349
1350         /* If we already set a value then just return it */
1351         if (asus->agfn_pwm >= 0)
1352                 return sprintf(buf, "%d\n", asus->agfn_pwm);
1353
1354         /*
1355          * If we haven't set already set a value through the AGFN interface,
1356          * we read a current value through the (now-deprecated) FAN_CTRL device.
1357          */
1358         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
1359         if (err < 0)
1360                 return err;
1361
1362         value &= 0xFF;
1363
1364         if (value == 1) /* Low Speed */
1365                 value = 85;
1366         else if (value == 2)
1367                 value = 170;
1368         else if (value == 3)
1369                 value = 255;
1370         else if (value) {
1371                 pr_err("Unknown fan speed %#x\n", value);
1372                 value = -1;
1373         }
1374
1375         return sprintf(buf, "%d\n", value);
1376 }
1377
1378 static ssize_t pwm1_store(struct device *dev,
1379                                      struct device_attribute *attr,
1380                                      const char *buf, size_t count) {
1381         struct asus_wmi *asus = dev_get_drvdata(dev);
1382         int value;
1383         int state;
1384         int ret;
1385
1386         ret = kstrtouint(buf, 10, &value);
1387         if (ret)
1388                 return ret;
1389
1390         value = clamp(value, 0, 255);
1391
1392         state = asus_agfn_fan_speed_write(asus, 1, &value);
1393         if (state)
1394                 pr_warn("Setting fan speed failed: %d\n", state);
1395         else
1396                 asus->fan_pwm_mode = ASUS_FAN_CTRL_MANUAL;
1397
1398         return count;
1399 }
1400
1401 static ssize_t fan1_input_show(struct device *dev,
1402                                         struct device_attribute *attr,
1403                                         char *buf)
1404 {
1405         struct asus_wmi *asus = dev_get_drvdata(dev);
1406         int value;
1407         int ret;
1408
1409         switch (asus->fan_type) {
1410         case FAN_TYPE_SPEC83:
1411                 ret = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_CPU_FAN_CTRL,
1412                                             &value);
1413                 if (ret < 0)
1414                         return ret;
1415
1416                 value &= 0xffff;
1417                 break;
1418
1419         case FAN_TYPE_AGFN:
1420                 /* no speed readable on manual mode */
1421                 if (asus->fan_pwm_mode == ASUS_FAN_CTRL_MANUAL)
1422                         return -ENXIO;
1423
1424                 ret = asus_agfn_fan_speed_read(asus, 1, &value);
1425                 if (ret) {
1426                         pr_warn("reading fan speed failed: %d\n", ret);
1427                         return -ENXIO;
1428                 }
1429                 break;
1430
1431         default:
1432                 return -ENXIO;
1433         }
1434
1435         return sprintf(buf, "%d\n", value < 0 ? -1 : value*100);
1436 }
1437
1438 static ssize_t pwm1_enable_show(struct device *dev,
1439                                                  struct device_attribute *attr,
1440                                                  char *buf)
1441 {
1442         struct asus_wmi *asus = dev_get_drvdata(dev);
1443
1444         /*
1445          * Just read back the cached pwm mode.
1446          *
1447          * For the CPU_FAN device, the spec indicates that we should be
1448          * able to read the device status and consult bit 19 to see if we
1449          * are in Full On or Automatic mode. However, this does not work
1450          * in practice on X532FL at least (the bit is always 0) and there's
1451          * also nothing in the DSDT to indicate that this behaviour exists.
1452          */
1453         return sprintf(buf, "%d\n", asus->fan_pwm_mode);
1454 }
1455
1456 static ssize_t pwm1_enable_store(struct device *dev,
1457                                                   struct device_attribute *attr,
1458                                                   const char *buf, size_t count)
1459 {
1460         struct asus_wmi *asus = dev_get_drvdata(dev);
1461         int status = 0;
1462         int state;
1463         int value;
1464         int ret;
1465         u32 retval;
1466
1467         ret = kstrtouint(buf, 10, &state);
1468         if (ret)
1469                 return ret;
1470
1471         if (asus->fan_type == FAN_TYPE_SPEC83) {
1472                 switch (state) { /* standard documented hwmon values */
1473                 case ASUS_FAN_CTRL_FULLSPEED:
1474                         value = 1;
1475                         break;
1476                 case ASUS_FAN_CTRL_AUTO:
1477                         value = 0;
1478                         break;
1479                 default:
1480                         return -EINVAL;
1481                 }
1482
1483                 ret = asus_wmi_set_devstate(ASUS_WMI_DEVID_CPU_FAN_CTRL,
1484                                             value, &retval);
1485                 if (ret)
1486                         return ret;
1487
1488                 if (retval != 1)
1489                         return -EIO;
1490         } else if (asus->fan_type == FAN_TYPE_AGFN) {
1491                 switch (state) {
1492                 case ASUS_FAN_CTRL_MANUAL:
1493                         break;
1494
1495                 case ASUS_FAN_CTRL_AUTO:
1496                         status = asus_fan_set_auto(asus);
1497                         if (status)
1498                                 return status;
1499                         break;
1500
1501                 default:
1502                         return -EINVAL;
1503                 }
1504         }
1505
1506         asus->fan_pwm_mode = state;
1507         return count;
1508 }
1509
1510 static ssize_t fan1_label_show(struct device *dev,
1511                                           struct device_attribute *attr,
1512                                           char *buf)
1513 {
1514         return sprintf(buf, "%s\n", ASUS_FAN_DESC);
1515 }
1516
1517 static ssize_t asus_hwmon_temp1(struct device *dev,
1518                                 struct device_attribute *attr,
1519                                 char *buf)
1520 {
1521         struct asus_wmi *asus = dev_get_drvdata(dev);
1522         u32 value;
1523         int err;
1524
1525         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1526         if (err < 0)
1527                 return err;
1528
1529         return sprintf(buf, "%ld\n",
1530                        deci_kelvin_to_millicelsius(value & 0xFFFF));
1531 }
1532
1533 /* Fan1 */
1534 static DEVICE_ATTR_RW(pwm1);
1535 static DEVICE_ATTR_RW(pwm1_enable);
1536 static DEVICE_ATTR_RO(fan1_input);
1537 static DEVICE_ATTR_RO(fan1_label);
1538
1539 /* Temperature */
1540 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1541
1542 static struct attribute *hwmon_attributes[] = {
1543         &dev_attr_pwm1.attr,
1544         &dev_attr_pwm1_enable.attr,
1545         &dev_attr_fan1_input.attr,
1546         &dev_attr_fan1_label.attr,
1547
1548         &dev_attr_temp1_input.attr,
1549         NULL
1550 };
1551
1552 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1553                                           struct attribute *attr, int idx)
1554 {
1555         struct device *dev = container_of(kobj, struct device, kobj);
1556         struct asus_wmi *asus = dev_get_drvdata(dev->parent);
1557         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1558
1559         if (attr == &dev_attr_pwm1.attr) {
1560                 if (asus->fan_type != FAN_TYPE_AGFN)
1561                         return 0;
1562         } else if (attr == &dev_attr_fan1_input.attr
1563             || attr == &dev_attr_fan1_label.attr
1564             || attr == &dev_attr_pwm1_enable.attr) {
1565                 if (asus->fan_type == FAN_TYPE_NONE)
1566                         return 0;
1567         } else if (attr == &dev_attr_temp1_input.attr) {
1568                 int err = asus_wmi_get_devstate(asus,
1569                                                 ASUS_WMI_DEVID_THERMAL_CTRL,
1570                                                 &value);
1571
1572                 if (err < 0)
1573                         return 0; /* can't return negative here */
1574
1575                 /*
1576                  * If the temperature value in deci-Kelvin is near the absolute
1577                  * zero temperature, something is clearly wrong
1578                  */
1579                 if (value == 0 || value == 1)
1580                         return 0;
1581         }
1582
1583         return attr->mode;
1584 }
1585
1586 static const struct attribute_group hwmon_attribute_group = {
1587         .is_visible = asus_hwmon_sysfs_is_visible,
1588         .attrs = hwmon_attributes
1589 };
1590 __ATTRIBUTE_GROUPS(hwmon_attribute);
1591
1592 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1593 {
1594         struct device *dev = &asus->platform_device->dev;
1595         struct device *hwmon;
1596
1597         hwmon = devm_hwmon_device_register_with_groups(dev, "asus", asus,
1598                         hwmon_attribute_groups);
1599
1600         if (IS_ERR(hwmon)) {
1601                 pr_err("Could not register asus hwmon device\n");
1602                 return PTR_ERR(hwmon);
1603         }
1604         return 0;
1605 }
1606
1607 static int asus_wmi_fan_init(struct asus_wmi *asus)
1608 {
1609         asus->fan_type = FAN_TYPE_NONE;
1610         asus->agfn_pwm = -1;
1611
1612         if (asus_wmi_dev_is_present(asus, ASUS_WMI_DEVID_CPU_FAN_CTRL))
1613                 asus->fan_type = FAN_TYPE_SPEC83;
1614         else if (asus_wmi_has_agfn_fan(asus))
1615                 asus->fan_type = FAN_TYPE_AGFN;
1616
1617         if (asus->fan_type == FAN_TYPE_NONE)
1618                 return -ENODEV;
1619
1620         asus_fan_set_auto(asus);
1621         asus->fan_pwm_mode = ASUS_FAN_CTRL_AUTO;
1622         return 0;
1623 }
1624
1625 /* Fan mode *******************************************************************/
1626
1627 static int fan_boost_mode_check_present(struct asus_wmi *asus)
1628 {
1629         u32 result;
1630         int err;
1631
1632         asus->fan_boost_mode_available = false;
1633
1634         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_BOOST_MODE,
1635                                     &result);
1636         if (err) {
1637                 if (err == -ENODEV)
1638                         return 0;
1639                 else
1640                         return err;
1641         }
1642
1643         if ((result & ASUS_WMI_DSTS_PRESENCE_BIT) &&
1644                         (result & ASUS_FAN_BOOST_MODES_MASK)) {
1645                 asus->fan_boost_mode_available = true;
1646                 asus->fan_boost_mode_mask = result & ASUS_FAN_BOOST_MODES_MASK;
1647         }
1648
1649         return 0;
1650 }
1651
1652 static int fan_boost_mode_write(struct asus_wmi *asus)
1653 {
1654         int err;
1655         u8 value;
1656         u32 retval;
1657
1658         value = asus->fan_boost_mode;
1659
1660         pr_info("Set fan boost mode: %u\n", value);
1661         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_FAN_BOOST_MODE, value,
1662                                     &retval);
1663         if (err) {
1664                 pr_warn("Failed to set fan boost mode: %d\n", err);
1665                 return err;
1666         }
1667
1668         if (retval != 1) {
1669                 pr_warn("Failed to set fan boost mode (retval): 0x%x\n",
1670                         retval);
1671                 return -EIO;
1672         }
1673
1674         return 0;
1675 }
1676
1677 static int fan_boost_mode_switch_next(struct asus_wmi *asus)
1678 {
1679         u8 mask = asus->fan_boost_mode_mask;
1680
1681         if (asus->fan_boost_mode == ASUS_FAN_BOOST_MODE_NORMAL) {
1682                 if (mask & ASUS_FAN_BOOST_MODE_OVERBOOST_MASK)
1683                         asus->fan_boost_mode = ASUS_FAN_BOOST_MODE_OVERBOOST;
1684                 else if (mask & ASUS_FAN_BOOST_MODE_SILENT_MASK)
1685                         asus->fan_boost_mode = ASUS_FAN_BOOST_MODE_SILENT;
1686         } else if (asus->fan_boost_mode == ASUS_FAN_BOOST_MODE_OVERBOOST) {
1687                 if (mask & ASUS_FAN_BOOST_MODE_SILENT_MASK)
1688                         asus->fan_boost_mode = ASUS_FAN_BOOST_MODE_SILENT;
1689                 else
1690                         asus->fan_boost_mode = ASUS_FAN_BOOST_MODE_NORMAL;
1691         } else {
1692                 asus->fan_boost_mode = ASUS_FAN_BOOST_MODE_NORMAL;
1693         }
1694
1695         return fan_boost_mode_write(asus);
1696 }
1697
1698 static ssize_t fan_boost_mode_show(struct device *dev,
1699                                    struct device_attribute *attr, char *buf)
1700 {
1701         struct asus_wmi *asus = dev_get_drvdata(dev);
1702
1703         return scnprintf(buf, PAGE_SIZE, "%d\n", asus->fan_boost_mode);
1704 }
1705
1706 static ssize_t fan_boost_mode_store(struct device *dev,
1707                                     struct device_attribute *attr,
1708                                     const char *buf, size_t count)
1709 {
1710         int result;
1711         u8 new_mode;
1712         struct asus_wmi *asus = dev_get_drvdata(dev);
1713         u8 mask = asus->fan_boost_mode_mask;
1714
1715         result = kstrtou8(buf, 10, &new_mode);
1716         if (result < 0) {
1717                 pr_warn("Trying to store invalid value\n");
1718                 return result;
1719         }
1720
1721         if (new_mode == ASUS_FAN_BOOST_MODE_OVERBOOST) {
1722                 if (!(mask & ASUS_FAN_BOOST_MODE_OVERBOOST_MASK))
1723                         return -EINVAL;
1724         } else if (new_mode == ASUS_FAN_BOOST_MODE_SILENT) {
1725                 if (!(mask & ASUS_FAN_BOOST_MODE_SILENT_MASK))
1726                         return -EINVAL;
1727         } else if (new_mode != ASUS_FAN_BOOST_MODE_NORMAL) {
1728                 return -EINVAL;
1729         }
1730
1731         asus->fan_boost_mode = new_mode;
1732         fan_boost_mode_write(asus);
1733
1734         return count;
1735 }
1736
1737 // Fan boost mode: 0 - normal, 1 - overboost, 2 - silent
1738 static DEVICE_ATTR_RW(fan_boost_mode);
1739
1740 /* Throttle thermal policy ****************************************************/
1741
1742 static int throttle_thermal_policy_check_present(struct asus_wmi *asus)
1743 {
1744         u32 result;
1745         int err;
1746
1747         asus->throttle_thermal_policy_available = false;
1748
1749         err = asus_wmi_get_devstate(asus,
1750                                     ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
1751                                     &result);
1752         if (err) {
1753                 if (err == -ENODEV)
1754                         return 0;
1755                 return err;
1756         }
1757
1758         if (result & ASUS_WMI_DSTS_PRESENCE_BIT)
1759                 asus->throttle_thermal_policy_available = true;
1760
1761         return 0;
1762 }
1763
1764 static int throttle_thermal_policy_write(struct asus_wmi *asus)
1765 {
1766         int err;
1767         u8 value;
1768         u32 retval;
1769
1770         value = asus->throttle_thermal_policy_mode;
1771
1772         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_THROTTLE_THERMAL_POLICY,
1773                                     value, &retval);
1774         if (err) {
1775                 pr_warn("Failed to set throttle thermal policy: %d\n", err);
1776                 return err;
1777         }
1778
1779         if (retval != 1) {
1780                 pr_warn("Failed to set throttle thermal policy (retval): 0x%x\n",
1781                         retval);
1782                 return -EIO;
1783         }
1784
1785         return 0;
1786 }
1787
1788 static int throttle_thermal_policy_set_default(struct asus_wmi *asus)
1789 {
1790         if (!asus->throttle_thermal_policy_available)
1791                 return 0;
1792
1793         asus->throttle_thermal_policy_mode = ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
1794         return throttle_thermal_policy_write(asus);
1795 }
1796
1797 static int throttle_thermal_policy_switch_next(struct asus_wmi *asus)
1798 {
1799         u8 new_mode = asus->throttle_thermal_policy_mode + 1;
1800
1801         if (new_mode > ASUS_THROTTLE_THERMAL_POLICY_SILENT)
1802                 new_mode = ASUS_THROTTLE_THERMAL_POLICY_DEFAULT;
1803
1804         asus->throttle_thermal_policy_mode = new_mode;
1805         return throttle_thermal_policy_write(asus);
1806 }
1807
1808 static ssize_t throttle_thermal_policy_show(struct device *dev,
1809                                    struct device_attribute *attr, char *buf)
1810 {
1811         struct asus_wmi *asus = dev_get_drvdata(dev);
1812         u8 mode = asus->throttle_thermal_policy_mode;
1813
1814         return scnprintf(buf, PAGE_SIZE, "%d\n", mode);
1815 }
1816
1817 static ssize_t throttle_thermal_policy_store(struct device *dev,
1818                                     struct device_attribute *attr,
1819                                     const char *buf, size_t count)
1820 {
1821         int result;
1822         u8 new_mode;
1823         struct asus_wmi *asus = dev_get_drvdata(dev);
1824
1825         result = kstrtou8(buf, 10, &new_mode);
1826         if (result < 0)
1827                 return result;
1828
1829         if (new_mode > ASUS_THROTTLE_THERMAL_POLICY_SILENT)
1830                 return -EINVAL;
1831
1832         asus->throttle_thermal_policy_mode = new_mode;
1833         throttle_thermal_policy_write(asus);
1834
1835         return count;
1836 }
1837
1838 // Throttle thermal policy: 0 - default, 1 - overboost, 2 - silent
1839 static DEVICE_ATTR_RW(throttle_thermal_policy);
1840
1841 /* Backlight ******************************************************************/
1842
1843 static int read_backlight_power(struct asus_wmi *asus)
1844 {
1845         int ret;
1846
1847         if (asus->driver->quirks->store_backlight_power)
1848                 ret = !asus->driver->panel_power;
1849         else
1850                 ret = asus_wmi_get_devstate_simple(asus,
1851                                                    ASUS_WMI_DEVID_BACKLIGHT);
1852
1853         if (ret < 0)
1854                 return ret;
1855
1856         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1857 }
1858
1859 static int read_brightness_max(struct asus_wmi *asus)
1860 {
1861         u32 retval;
1862         int err;
1863
1864         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1865         if (err < 0)
1866                 return err;
1867
1868         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1869         retval >>= 8;
1870
1871         if (!retval)
1872                 return -ENODEV;
1873
1874         return retval;
1875 }
1876
1877 static int read_brightness(struct backlight_device *bd)
1878 {
1879         struct asus_wmi *asus = bl_get_data(bd);
1880         u32 retval;
1881         int err;
1882
1883         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1884         if (err < 0)
1885                 return err;
1886
1887         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1888 }
1889
1890 static u32 get_scalar_command(struct backlight_device *bd)
1891 {
1892         struct asus_wmi *asus = bl_get_data(bd);
1893         u32 ctrl_param = 0;
1894
1895         if ((asus->driver->brightness < bd->props.brightness) ||
1896             bd->props.brightness == bd->props.max_brightness)
1897                 ctrl_param = 0x00008001;
1898         else if ((asus->driver->brightness > bd->props.brightness) ||
1899                  bd->props.brightness == 0)
1900                 ctrl_param = 0x00008000;
1901
1902         asus->driver->brightness = bd->props.brightness;
1903
1904         return ctrl_param;
1905 }
1906
1907 static int update_bl_status(struct backlight_device *bd)
1908 {
1909         struct asus_wmi *asus = bl_get_data(bd);
1910         u32 ctrl_param;
1911         int power, err = 0;
1912
1913         power = read_backlight_power(asus);
1914         if (power != -ENODEV && bd->props.power != power) {
1915                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1916                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1917                                             ctrl_param, NULL);
1918                 if (asus->driver->quirks->store_backlight_power)
1919                         asus->driver->panel_power = bd->props.power;
1920
1921                 /* When using scalar brightness, updating the brightness
1922                  * will mess with the backlight power */
1923                 if (asus->driver->quirks->scalar_panel_brightness)
1924                         return err;
1925         }
1926
1927         if (asus->driver->quirks->scalar_panel_brightness)
1928                 ctrl_param = get_scalar_command(bd);
1929         else
1930                 ctrl_param = bd->props.brightness;
1931
1932         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1933                                     ctrl_param, NULL);
1934
1935         return err;
1936 }
1937
1938 static const struct backlight_ops asus_wmi_bl_ops = {
1939         .get_brightness = read_brightness,
1940         .update_status = update_bl_status,
1941 };
1942
1943 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1944 {
1945         struct backlight_device *bd = asus->backlight_device;
1946         int old = bd->props.brightness;
1947         int new = old;
1948
1949         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1950                 new = code - NOTIFY_BRNUP_MIN + 1;
1951         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1952                 new = code - NOTIFY_BRNDOWN_MIN;
1953
1954         bd->props.brightness = new;
1955         backlight_update_status(bd);
1956         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1957
1958         return old;
1959 }
1960
1961 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1962 {
1963         struct backlight_device *bd;
1964         struct backlight_properties props;
1965         int max;
1966         int power;
1967
1968         max = read_brightness_max(asus);
1969         if (max < 0)
1970                 return max;
1971
1972         power = read_backlight_power(asus);
1973         if (power == -ENODEV)
1974                 power = FB_BLANK_UNBLANK;
1975         else if (power < 0)
1976                 return power;
1977
1978         memset(&props, 0, sizeof(struct backlight_properties));
1979         props.type = BACKLIGHT_PLATFORM;
1980         props.max_brightness = max;
1981         bd = backlight_device_register(asus->driver->name,
1982                                        &asus->platform_device->dev, asus,
1983                                        &asus_wmi_bl_ops, &props);
1984         if (IS_ERR(bd)) {
1985                 pr_err("Could not register backlight device\n");
1986                 return PTR_ERR(bd);
1987         }
1988
1989         asus->backlight_device = bd;
1990
1991         if (asus->driver->quirks->store_backlight_power)
1992                 asus->driver->panel_power = power;
1993
1994         bd->props.brightness = read_brightness(bd);
1995         bd->props.power = power;
1996         backlight_update_status(bd);
1997
1998         asus->driver->brightness = bd->props.brightness;
1999
2000         return 0;
2001 }
2002
2003 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
2004 {
2005         backlight_device_unregister(asus->backlight_device);
2006
2007         asus->backlight_device = NULL;
2008 }
2009
2010 static int is_display_toggle(int code)
2011 {
2012         /* display toggle keys */
2013         if ((code >= 0x61 && code <= 0x67) ||
2014             (code >= 0x8c && code <= 0x93) ||
2015             (code >= 0xa0 && code <= 0xa7) ||
2016             (code >= 0xd0 && code <= 0xd5))
2017                 return 1;
2018
2019         return 0;
2020 }
2021
2022 /* Fn-lock ********************************************************************/
2023
2024 static bool asus_wmi_has_fnlock_key(struct asus_wmi *asus)
2025 {
2026         u32 result;
2027
2028         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FNLOCK, &result);
2029
2030         return (result & ASUS_WMI_DSTS_PRESENCE_BIT) &&
2031                 !(result & ASUS_WMI_FNLOCK_BIOS_DISABLED);
2032 }
2033
2034 static void asus_wmi_fnlock_update(struct asus_wmi *asus)
2035 {
2036         int mode = asus->fnlock_locked;
2037
2038         asus_wmi_set_devstate(ASUS_WMI_DEVID_FNLOCK, mode, NULL);
2039 }
2040
2041 /* WMI events *****************************************************************/
2042
2043 static int asus_wmi_get_event_code(u32 value)
2044 {
2045         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
2046         union acpi_object *obj;
2047         acpi_status status;
2048         int code;
2049
2050         status = wmi_get_event_data(value, &response);
2051         if (ACPI_FAILURE(status)) {
2052                 pr_warn("Failed to get WMI notify code: %s\n",
2053                                 acpi_format_exception(status));
2054                 return -EIO;
2055         }
2056
2057         obj = (union acpi_object *)response.pointer;
2058
2059         if (obj && obj->type == ACPI_TYPE_INTEGER)
2060                 code = (int)(obj->integer.value & WMI_EVENT_MASK);
2061         else
2062                 code = -EIO;
2063
2064         kfree(obj);
2065         return code;
2066 }
2067
2068 static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
2069 {
2070         unsigned int key_value = 1;
2071         bool autorelease = 1;
2072         int result, orig_code;
2073
2074         orig_code = code;
2075
2076         if (asus->driver->key_filter) {
2077                 asus->driver->key_filter(asus->driver, &code, &key_value,
2078                                          &autorelease);
2079                 if (code == ASUS_WMI_KEY_IGNORE)
2080                         return;
2081         }
2082
2083         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
2084                 code = ASUS_WMI_BRN_UP;
2085         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
2086                 code = ASUS_WMI_BRN_DOWN;
2087
2088         if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
2089                 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
2090                         asus_wmi_backlight_notify(asus, orig_code);
2091                         return;
2092                 }
2093         }
2094
2095         if (code == NOTIFY_KBD_BRTUP) {
2096                 kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
2097                 return;
2098         }
2099         if (code == NOTIFY_KBD_BRTDWN) {
2100                 kbd_led_set_by_kbd(asus, asus->kbd_led_wk - 1);
2101                 return;
2102         }
2103         if (code == NOTIFY_KBD_BRTTOGGLE) {
2104                 if (asus->kbd_led_wk == asus->kbd_led.max_brightness)
2105                         kbd_led_set_by_kbd(asus, 0);
2106                 else
2107                         kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
2108                 return;
2109         }
2110
2111         if (code == NOTIFY_FNLOCK_TOGGLE) {
2112                 asus->fnlock_locked = !asus->fnlock_locked;
2113                 asus_wmi_fnlock_update(asus);
2114                 return;
2115         }
2116
2117         if (code == NOTIFY_KBD_DOCK_CHANGE) {
2118                 result = asus_wmi_get_devstate_simple(asus,
2119                                                       ASUS_WMI_DEVID_KBD_DOCK);
2120                 if (result >= 0) {
2121                         input_report_switch(asus->inputdev, SW_TABLET_MODE,
2122                                             !result);
2123                         input_sync(asus->inputdev);
2124                 }
2125                 return;
2126         }
2127
2128         if (asus->fan_boost_mode_available && code == NOTIFY_KBD_FBM) {
2129                 fan_boost_mode_switch_next(asus);
2130                 return;
2131         }
2132
2133         if (asus->throttle_thermal_policy_available && code == NOTIFY_KBD_TTP) {
2134                 throttle_thermal_policy_switch_next(asus);
2135                 return;
2136         }
2137
2138         if (is_display_toggle(code) && asus->driver->quirks->no_display_toggle)
2139                 return;
2140
2141         if (!sparse_keymap_report_event(asus->inputdev, code,
2142                                         key_value, autorelease))
2143                 pr_info("Unknown key %x pressed\n", code);
2144 }
2145
2146 static void asus_wmi_notify(u32 value, void *context)
2147 {
2148         struct asus_wmi *asus = context;
2149         int code;
2150         int i;
2151
2152         for (i = 0; i < WMI_EVENT_QUEUE_SIZE + 1; i++) {
2153                 code = asus_wmi_get_event_code(value);
2154                 if (code < 0) {
2155                         pr_warn("Failed to get notify code: %d\n", code);
2156                         return;
2157                 }
2158
2159                 if (code == WMI_EVENT_QUEUE_END || code == WMI_EVENT_MASK)
2160                         return;
2161
2162                 asus_wmi_handle_event_code(code, asus);
2163
2164                 /*
2165                  * Double check that queue is present:
2166                  * ATK (with queue) uses 0xff, ASUSWMI (without) 0xd2.
2167                  */
2168                 if (!asus->wmi_event_queue || value != WMI_EVENT_VALUE_ATK)
2169                         return;
2170         }
2171
2172         pr_warn("Failed to process event queue, last code: 0x%x\n", code);
2173 }
2174
2175 static int asus_wmi_notify_queue_flush(struct asus_wmi *asus)
2176 {
2177         int code;
2178         int i;
2179
2180         for (i = 0; i < WMI_EVENT_QUEUE_SIZE + 1; i++) {
2181                 code = asus_wmi_get_event_code(WMI_EVENT_VALUE_ATK);
2182                 if (code < 0) {
2183                         pr_warn("Failed to get event during flush: %d\n", code);
2184                         return code;
2185                 }
2186
2187                 if (code == WMI_EVENT_QUEUE_END || code == WMI_EVENT_MASK)
2188                         return 0;
2189         }
2190
2191         pr_warn("Failed to flush event queue\n");
2192         return -EIO;
2193 }
2194
2195 /* Sysfs **********************************************************************/
2196
2197 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
2198                              const char *buf, size_t count)
2199 {
2200         u32 retval;
2201         int err, value;
2202
2203         value = asus_wmi_get_devstate_simple(asus, devid);
2204         if (value < 0)
2205                 return value;
2206
2207         err = kstrtoint(buf, 0, &value);
2208         if (err)
2209                 return err;
2210
2211         err = asus_wmi_set_devstate(devid, value, &retval);
2212         if (err < 0)
2213                 return err;
2214
2215         return count;
2216 }
2217
2218 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
2219 {
2220         int value = asus_wmi_get_devstate_simple(asus, devid);
2221
2222         if (value < 0)
2223                 return value;
2224
2225         return sprintf(buf, "%d\n", value);
2226 }
2227
2228 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
2229         static ssize_t show_##_name(struct device *dev,                 \
2230                                     struct device_attribute *attr,      \
2231                                     char *buf)                          \
2232         {                                                               \
2233                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
2234                                                                         \
2235                 return show_sys_wmi(asus, _cm, buf);                    \
2236         }                                                               \
2237         static ssize_t store_##_name(struct device *dev,                \
2238                                      struct device_attribute *attr,     \
2239                                      const char *buf, size_t count)     \
2240         {                                                               \
2241                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
2242                                                                         \
2243                 return store_sys_wmi(asus, _cm, buf, count);            \
2244         }                                                               \
2245         static struct device_attribute dev_attr_##_name = {             \
2246                 .attr = {                                               \
2247                         .name = __stringify(_name),                     \
2248                         .mode = _mode },                                \
2249                 .show   = show_##_name,                                 \
2250                 .store  = store_##_name,                                \
2251         }
2252
2253 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
2254 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
2255 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
2256 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
2257 ASUS_WMI_CREATE_DEVICE_ATTR(als_enable, 0644, ASUS_WMI_DEVID_ALS_ENABLE);
2258
2259 static ssize_t cpufv_store(struct device *dev, struct device_attribute *attr,
2260                            const char *buf, size_t count)
2261 {
2262         int value, rv;
2263
2264         rv = kstrtoint(buf, 0, &value);
2265         if (rv)
2266                 return rv;
2267
2268         if (value < 0 || value > 2)
2269                 return -EINVAL;
2270
2271         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
2272         if (rv < 0)
2273                 return rv;
2274
2275         return count;
2276 }
2277
2278 static DEVICE_ATTR_WO(cpufv);
2279
2280 static struct attribute *platform_attributes[] = {
2281         &dev_attr_cpufv.attr,
2282         &dev_attr_camera.attr,
2283         &dev_attr_cardr.attr,
2284         &dev_attr_touchpad.attr,
2285         &dev_attr_lid_resume.attr,
2286         &dev_attr_als_enable.attr,
2287         &dev_attr_fan_boost_mode.attr,
2288         &dev_attr_throttle_thermal_policy.attr,
2289         NULL
2290 };
2291
2292 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
2293                                     struct attribute *attr, int idx)
2294 {
2295         struct device *dev = container_of(kobj, struct device, kobj);
2296         struct asus_wmi *asus = dev_get_drvdata(dev);
2297         bool ok = true;
2298         int devid = -1;
2299
2300         if (attr == &dev_attr_camera.attr)
2301                 devid = ASUS_WMI_DEVID_CAMERA;
2302         else if (attr == &dev_attr_cardr.attr)
2303                 devid = ASUS_WMI_DEVID_CARDREADER;
2304         else if (attr == &dev_attr_touchpad.attr)
2305                 devid = ASUS_WMI_DEVID_TOUCHPAD;
2306         else if (attr == &dev_attr_lid_resume.attr)
2307                 devid = ASUS_WMI_DEVID_LID_RESUME;
2308         else if (attr == &dev_attr_als_enable.attr)
2309                 devid = ASUS_WMI_DEVID_ALS_ENABLE;
2310         else if (attr == &dev_attr_fan_boost_mode.attr)
2311                 ok = asus->fan_boost_mode_available;
2312         else if (attr == &dev_attr_throttle_thermal_policy.attr)
2313                 ok = asus->throttle_thermal_policy_available;
2314
2315         if (devid != -1)
2316                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
2317
2318         return ok ? attr->mode : 0;
2319 }
2320
2321 static const struct attribute_group platform_attribute_group = {
2322         .is_visible = asus_sysfs_is_visible,
2323         .attrs = platform_attributes
2324 };
2325
2326 static void asus_wmi_sysfs_exit(struct platform_device *device)
2327 {
2328         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
2329 }
2330
2331 static int asus_wmi_sysfs_init(struct platform_device *device)
2332 {
2333         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
2334 }
2335
2336 /* Platform device ************************************************************/
2337
2338 static int asus_wmi_platform_init(struct asus_wmi *asus)
2339 {
2340         struct device *dev = &asus->platform_device->dev;
2341         char *wmi_uid;
2342         int rv;
2343
2344         /* INIT enable hotkeys on some models */
2345         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
2346                 pr_info("Initialization: %#x\n", rv);
2347
2348         /* We don't know yet what to do with this version... */
2349         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
2350                 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
2351                 asus->spec = rv;
2352         }
2353
2354         /*
2355          * The SFUN method probably allows the original driver to get the list
2356          * of features supported by a given model. For now, 0x0100 or 0x0800
2357          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
2358          * The significance of others is yet to be found.
2359          */
2360         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
2361                 pr_info("SFUN value: %#x\n", rv);
2362                 asus->sfun = rv;
2363         }
2364
2365         /*
2366          * Eee PC and Notebooks seems to have different method_id for DSTS,
2367          * but it may also be related to the BIOS's SPEC.
2368          * Note, on most Eeepc, there is no way to check if a method exist
2369          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
2370          * but once again, SPEC may probably be used for that kind of things.
2371          *
2372          * Additionally at least TUF Gaming series laptops return nothing for
2373          * unknown methods, so the detection in this way is not possible.
2374          *
2375          * There is strong indication that only ACPI WMI devices that have _UID
2376          * equal to "ASUSWMI" use DCTS whereas those with "ATK" use DSTS.
2377          */
2378         wmi_uid = wmi_get_acpi_device_uid(ASUS_WMI_MGMT_GUID);
2379         if (!wmi_uid)
2380                 return -ENODEV;
2381
2382         if (!strcmp(wmi_uid, ASUS_ACPI_UID_ASUSWMI)) {
2383                 dev_info(dev, "Detected ASUSWMI, use DCTS\n");
2384                 asus->dsts_id = ASUS_WMI_METHODID_DCTS;
2385         } else {
2386                 dev_info(dev, "Detected %s, not ASUSWMI, use DSTS\n", wmi_uid);
2387                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
2388         }
2389
2390         /*
2391          * Some devices can have multiple event codes stored in a queue before
2392          * the module load if it was unloaded intermittently after calling
2393          * the INIT method (enables event handling). The WMI notify handler is
2394          * expected to retrieve all event codes until a retrieved code equals
2395          * queue end marker (One or Ones). Old codes are flushed from the queue
2396          * upon module load. Not enabling this when it should be has minimal
2397          * visible impact so fall back if anything goes wrong.
2398          */
2399         wmi_uid = wmi_get_acpi_device_uid(asus->driver->event_guid);
2400         if (wmi_uid && !strcmp(wmi_uid, ASUS_ACPI_UID_ATK)) {
2401                 dev_info(dev, "Detected ATK, enable event queue\n");
2402
2403                 if (!asus_wmi_notify_queue_flush(asus))
2404                         asus->wmi_event_queue = true;
2405         }
2406
2407         /* CWAP allow to define the behavior of the Fn+F2 key,
2408          * this method doesn't seems to be present on Eee PCs */
2409         if (asus->driver->quirks->wapf >= 0)
2410                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
2411                                       asus->driver->quirks->wapf, NULL);
2412
2413         return 0;
2414 }
2415
2416 /* debugfs ********************************************************************/
2417
2418 struct asus_wmi_debugfs_node {
2419         struct asus_wmi *asus;
2420         char *name;
2421         int (*show) (struct seq_file *m, void *data);
2422 };
2423
2424 static int show_dsts(struct seq_file *m, void *data)
2425 {
2426         struct asus_wmi *asus = m->private;
2427         int err;
2428         u32 retval = -1;
2429
2430         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
2431         if (err < 0)
2432                 return err;
2433
2434         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
2435
2436         return 0;
2437 }
2438
2439 static int show_devs(struct seq_file *m, void *data)
2440 {
2441         struct asus_wmi *asus = m->private;
2442         int err;
2443         u32 retval = -1;
2444
2445         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
2446                                     &retval);
2447         if (err < 0)
2448                 return err;
2449
2450         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
2451                    asus->debug.ctrl_param, retval);
2452
2453         return 0;
2454 }
2455
2456 static int show_call(struct seq_file *m, void *data)
2457 {
2458         struct asus_wmi *asus = m->private;
2459         struct bios_args args = {
2460                 .arg0 = asus->debug.dev_id,
2461                 .arg1 = asus->debug.ctrl_param,
2462         };
2463         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
2464         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
2465         union acpi_object *obj;
2466         acpi_status status;
2467
2468         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
2469                                      0, asus->debug.method_id,
2470                                      &input, &output);
2471
2472         if (ACPI_FAILURE(status))
2473                 return -EIO;
2474
2475         obj = (union acpi_object *)output.pointer;
2476         if (obj && obj->type == ACPI_TYPE_INTEGER)
2477                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
2478                            asus->debug.dev_id, asus->debug.ctrl_param,
2479                            (u32) obj->integer.value);
2480         else
2481                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
2482                            asus->debug.dev_id, asus->debug.ctrl_param,
2483                            obj ? obj->type : -1);
2484
2485         kfree(obj);
2486
2487         return 0;
2488 }
2489
2490 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
2491         {NULL, "devs", show_devs},
2492         {NULL, "dsts", show_dsts},
2493         {NULL, "call", show_call},
2494 };
2495
2496 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
2497 {
2498         struct asus_wmi_debugfs_node *node = inode->i_private;
2499
2500         return single_open(file, node->show, node->asus);
2501 }
2502
2503 static const struct file_operations asus_wmi_debugfs_io_ops = {
2504         .owner = THIS_MODULE,
2505         .open = asus_wmi_debugfs_open,
2506         .read = seq_read,
2507         .llseek = seq_lseek,
2508         .release = single_release,
2509 };
2510
2511 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
2512 {
2513         debugfs_remove_recursive(asus->debug.root);
2514 }
2515
2516 static void asus_wmi_debugfs_init(struct asus_wmi *asus)
2517 {
2518         int i;
2519
2520         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
2521
2522         debugfs_create_x32("method_id", S_IRUGO | S_IWUSR, asus->debug.root,
2523                            &asus->debug.method_id);
2524
2525         debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR, asus->debug.root,
2526                            &asus->debug.dev_id);
2527
2528         debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR, asus->debug.root,
2529                            &asus->debug.ctrl_param);
2530
2531         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
2532                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
2533
2534                 node->asus = asus;
2535                 debugfs_create_file(node->name, S_IFREG | S_IRUGO,
2536                                     asus->debug.root, node,
2537                                     &asus_wmi_debugfs_io_ops);
2538         }
2539 }
2540
2541 /* Init / exit ****************************************************************/
2542
2543 static int asus_wmi_add(struct platform_device *pdev)
2544 {
2545         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2546         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2547         struct asus_wmi *asus;
2548         const char *chassis_type;
2549         acpi_status status;
2550         int err;
2551         u32 result;
2552
2553         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
2554         if (!asus)
2555                 return -ENOMEM;
2556
2557         asus->driver = wdrv;
2558         asus->platform_device = pdev;
2559         wdrv->platform_device = pdev;
2560         platform_set_drvdata(asus->platform_device, asus);
2561
2562         if (wdrv->detect_quirks)
2563                 wdrv->detect_quirks(asus->driver);
2564
2565         err = asus_wmi_platform_init(asus);
2566         if (err)
2567                 goto fail_platform;
2568
2569         err = fan_boost_mode_check_present(asus);
2570         if (err)
2571                 goto fail_fan_boost_mode;
2572
2573         err = throttle_thermal_policy_check_present(asus);
2574         if (err)
2575                 goto fail_throttle_thermal_policy;
2576         else
2577                 throttle_thermal_policy_set_default(asus);
2578
2579         err = asus_wmi_sysfs_init(asus->platform_device);
2580         if (err)
2581                 goto fail_sysfs;
2582
2583         err = asus_wmi_input_init(asus);
2584         if (err)
2585                 goto fail_input;
2586
2587         err = asus_wmi_fan_init(asus); /* probably no problems on error */
2588
2589         err = asus_wmi_hwmon_init(asus);
2590         if (err)
2591                 goto fail_hwmon;
2592
2593         err = asus_wmi_led_init(asus);
2594         if (err)
2595                 goto fail_leds;
2596
2597         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
2598         if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
2599                 asus->driver->wlan_ctrl_by_user = 1;
2600
2601         if (!(asus->driver->wlan_ctrl_by_user && ashs_present())) {
2602                 err = asus_wmi_rfkill_init(asus);
2603                 if (err)
2604                         goto fail_rfkill;
2605         }
2606
2607         if (asus->driver->quirks->wmi_force_als_set)
2608                 asus_wmi_set_als();
2609
2610         /* Some Asus desktop boards export an acpi-video backlight interface,
2611            stop this from showing up */
2612         chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
2613         if (chassis_type && !strcmp(chassis_type, "3"))
2614                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2615
2616         if (asus->driver->quirks->wmi_backlight_power)
2617                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2618
2619         if (asus->driver->quirks->wmi_backlight_native)
2620                 acpi_video_set_dmi_backlight_type(acpi_backlight_native);
2621
2622         if (asus->driver->quirks->xusb2pr)
2623                 asus_wmi_set_xusb2pr(asus);
2624
2625         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
2626                 err = asus_wmi_backlight_init(asus);
2627                 if (err && err != -ENODEV)
2628                         goto fail_backlight;
2629         } else if (asus->driver->quirks->wmi_backlight_set_devstate)
2630                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 2, NULL);
2631
2632         if (asus_wmi_has_fnlock_key(asus)) {
2633                 asus->fnlock_locked = true;
2634                 asus_wmi_fnlock_update(asus);
2635         }
2636
2637         status = wmi_install_notify_handler(asus->driver->event_guid,
2638                                             asus_wmi_notify, asus);
2639         if (ACPI_FAILURE(status)) {
2640                 pr_err("Unable to register notify handler - %d\n", status);
2641                 err = -ENODEV;
2642                 goto fail_wmi_handler;
2643         }
2644
2645         asus_wmi_battery_init(asus);
2646
2647         asus_wmi_debugfs_init(asus);
2648
2649         return 0;
2650
2651 fail_wmi_handler:
2652         asus_wmi_backlight_exit(asus);
2653 fail_backlight:
2654         asus_wmi_rfkill_exit(asus);
2655 fail_rfkill:
2656         asus_wmi_led_exit(asus);
2657 fail_leds:
2658 fail_hwmon:
2659         asus_wmi_input_exit(asus);
2660 fail_input:
2661         asus_wmi_sysfs_exit(asus->platform_device);
2662 fail_sysfs:
2663 fail_throttle_thermal_policy:
2664 fail_fan_boost_mode:
2665 fail_platform:
2666         kfree(asus);
2667         return err;
2668 }
2669
2670 static int asus_wmi_remove(struct platform_device *device)
2671 {
2672         struct asus_wmi *asus;
2673
2674         asus = platform_get_drvdata(device);
2675         wmi_remove_notify_handler(asus->driver->event_guid);
2676         asus_wmi_backlight_exit(asus);
2677         asus_wmi_input_exit(asus);
2678         asus_wmi_led_exit(asus);
2679         asus_wmi_rfkill_exit(asus);
2680         asus_wmi_debugfs_exit(asus);
2681         asus_wmi_sysfs_exit(asus->platform_device);
2682         asus_fan_set_auto(asus);
2683         asus_wmi_battery_exit(asus);
2684
2685         kfree(asus);
2686         return 0;
2687 }
2688
2689 /* Platform driver - hibernate/resume callbacks *******************************/
2690
2691 static int asus_hotk_thaw(struct device *device)
2692 {
2693         struct asus_wmi *asus = dev_get_drvdata(device);
2694
2695         if (asus->wlan.rfkill) {
2696                 bool wlan;
2697
2698                 /*
2699                  * Work around bios bug - acpi _PTS turns off the wireless led
2700                  * during suspend.  Normally it restores it on resume, but
2701                  * we should kick it ourselves in case hibernation is aborted.
2702                  */
2703                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
2704                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
2705         }
2706
2707         return 0;
2708 }
2709
2710 static int asus_hotk_resume(struct device *device)
2711 {
2712         struct asus_wmi *asus = dev_get_drvdata(device);
2713
2714         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2715                 kbd_led_update(asus);
2716
2717         if (asus_wmi_has_fnlock_key(asus))
2718                 asus_wmi_fnlock_update(asus);
2719         return 0;
2720 }
2721
2722 static int asus_hotk_restore(struct device *device)
2723 {
2724         struct asus_wmi *asus = dev_get_drvdata(device);
2725         int bl;
2726
2727         /* Refresh both wlan rfkill state and pci hotplug */
2728         if (asus->wlan.rfkill)
2729                 asus_rfkill_hotplug(asus);
2730
2731         if (asus->bluetooth.rfkill) {
2732                 bl = !asus_wmi_get_devstate_simple(asus,
2733                                                    ASUS_WMI_DEVID_BLUETOOTH);
2734                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
2735         }
2736         if (asus->wimax.rfkill) {
2737                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
2738                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
2739         }
2740         if (asus->wwan3g.rfkill) {
2741                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
2742                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
2743         }
2744         if (asus->gps.rfkill) {
2745                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
2746                 rfkill_set_sw_state(asus->gps.rfkill, bl);
2747         }
2748         if (asus->uwb.rfkill) {
2749                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
2750                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
2751         }
2752         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2753                 kbd_led_update(asus);
2754
2755         if (asus_wmi_has_fnlock_key(asus))
2756                 asus_wmi_fnlock_update(asus);
2757         return 0;
2758 }
2759
2760 static const struct dev_pm_ops asus_pm_ops = {
2761         .thaw = asus_hotk_thaw,
2762         .restore = asus_hotk_restore,
2763         .resume = asus_hotk_resume,
2764 };
2765
2766 /* Registration ***************************************************************/
2767
2768 static int asus_wmi_probe(struct platform_device *pdev)
2769 {
2770         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2771         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2772         int ret;
2773
2774         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
2775                 pr_warn("ASUS Management GUID not found\n");
2776                 return -ENODEV;
2777         }
2778
2779         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
2780                 pr_warn("ASUS Event GUID not found\n");
2781                 return -ENODEV;
2782         }
2783
2784         if (wdrv->probe) {
2785                 ret = wdrv->probe(pdev);
2786                 if (ret)
2787                         return ret;
2788         }
2789
2790         return asus_wmi_add(pdev);
2791 }
2792
2793 static bool used;
2794
2795 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
2796 {
2797         struct platform_driver *platform_driver;
2798         struct platform_device *platform_device;
2799
2800         if (used)
2801                 return -EBUSY;
2802
2803         platform_driver = &driver->platform_driver;
2804         platform_driver->remove = asus_wmi_remove;
2805         platform_driver->driver.owner = driver->owner;
2806         platform_driver->driver.name = driver->name;
2807         platform_driver->driver.pm = &asus_pm_ops;
2808
2809         platform_device = platform_create_bundle(platform_driver,
2810                                                  asus_wmi_probe,
2811                                                  NULL, 0, NULL, 0);
2812         if (IS_ERR(platform_device))
2813                 return PTR_ERR(platform_device);
2814
2815         used = true;
2816         return 0;
2817 }
2818 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
2819
2820 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
2821 {
2822         platform_device_unregister(driver->platform_device);
2823         platform_driver_unregister(&driver->platform_driver);
2824         used = false;
2825 }
2826 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
2827
2828 static int __init asus_wmi_init(void)
2829 {
2830         pr_info("ASUS WMI generic driver loaded\n");
2831         return 0;
2832 }
2833
2834 static void __exit asus_wmi_exit(void)
2835 {
2836         pr_info("ASUS WMI generic driver unloaded\n");
2837 }
2838
2839 module_init(asus_wmi_init);
2840 module_exit(asus_wmi_exit);