drivers/platform/x86/asus-wmi.c

   1 /*
   2  * Asus PC WMI hotkey driver
   3  *
   4  * Copyright(C) 2010 Intel Corporation.
   5  * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
   6  *
   7  * Portions based on wistron_btns.c:
   8  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
   9  * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  10  * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  28
  29 #include <linux/kernel.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/types.h>
  33 #include <linux/slab.h>
  34 #include <linux/input.h>
  35 #include <linux/input/sparse-keymap.h>
  36 #include <linux/fb.h>
  37 #include <linux/backlight.h>
  38 #include <linux/leds.h>
  39 #include <linux/rfkill.h>
  40 #include <linux/pci.h>
  41 #include <linux/pci_hotplug.h>
  42 #include <linux/hwmon.h>
  43 #include <linux/hwmon-sysfs.h>
  44 #include <linux/debugfs.h>
  45 #include <linux/seq_file.h>
  46 #include <linux/platform_device.h>
  47 #include <linux/thermal.h>
  48 #include <acpi/acpi_bus.h>
  49 #include <acpi/acpi_drivers.h>
  50 #include <acpi/video.h>
  51
  52 #include "asus-wmi.h"
  53
  54 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
  55               "Yong Wang <yong.y.wang@intel.com>");
  56 MODULE_DESCRIPTION("Asus Generic WMI Driver");
  57 MODULE_LICENSE("GPL");
  58
  59 #define to_platform_driver(drv)                                 \
  60         (container_of((drv), struct platform_driver, driver))
  61
  62 #define to_asus_wmi_driver(pdrv)                                        \
  63         (container_of((pdrv), struct asus_wmi_driver, platform_driver))
  64
  65 #define ASUS_WMI_MGMT_GUID      "97845ED0-4E6D-11DE-8A39-0800200C9A66"
  66
  67 #define NOTIFY_BRNUP_MIN                0x11
  68 #define NOTIFY_BRNUP_MAX                0x1f
  69 #define NOTIFY_BRNDOWN_MIN              0x20
  70 #define NOTIFY_BRNDOWN_MAX              0x2e
  71 #define NOTIFY_KBD_BRTUP                0xc4
  72 #define NOTIFY_KBD_BRTDWN               0xc5
  73
  74 /* WMI Methods */
  75 #define ASUS_WMI_METHODID_SPEC          0x43455053 /* BIOS SPECification */
  76 #define ASUS_WMI_METHODID_SFBD          0x44424653 /* Set First Boot Device */
  77 #define ASUS_WMI_METHODID_GLCD          0x44434C47 /* Get LCD status */
  78 #define ASUS_WMI_METHODID_GPID          0x44495047 /* Get Panel ID?? (Resol) */
  79 #define ASUS_WMI_METHODID_QMOD          0x444F4D51 /* Quiet MODe */
  80 #define ASUS_WMI_METHODID_SPLV          0x4C425053 /* Set Panel Light Value */
  81 #define ASUS_WMI_METHODID_SFUN          0x4E554653 /* FUNCtionalities */
  82 #define ASUS_WMI_METHODID_SDSP          0x50534453 /* Set DiSPlay output */
  83 #define ASUS_WMI_METHODID_GDSP          0x50534447 /* Get DiSPlay output */
  84 #define ASUS_WMI_METHODID_DEVP          0x50564544 /* DEVice Policy */
  85 #define ASUS_WMI_METHODID_OSVR          0x5256534F /* OS VeRsion */
  86 #define ASUS_WMI_METHODID_DSTS          0x53544344 /* Device STatuS */
  87 #define ASUS_WMI_METHODID_DSTS2         0x53545344 /* Device STatuS #2*/
  88 #define ASUS_WMI_METHODID_BSTS          0x53545342 /* Bios STatuS ? */
  89 #define ASUS_WMI_METHODID_DEVS          0x53564544 /* DEVice Set */
  90 #define ASUS_WMI_METHODID_CFVS          0x53564643 /* CPU Frequency Volt Set */
  91 #define ASUS_WMI_METHODID_KBFT          0x5446424B /* KeyBoard FilTer */
  92 #define ASUS_WMI_METHODID_INIT          0x54494E49 /* INITialize */
  93 #define ASUS_WMI_METHODID_HKEY          0x59454B48 /* Hot KEY ?? */
  94
  95 #define ASUS_WMI_UNSUPPORTED_METHOD     0xFFFFFFFE
  96
  97 /* Wireless */
  98 #define ASUS_WMI_DEVID_HW_SWITCH        0x00010001
  99 #define ASUS_WMI_DEVID_WIRELESS_LED     0x00010002
 100 #define ASUS_WMI_DEVID_CWAP             0x00010003
 101 #define ASUS_WMI_DEVID_WLAN             0x00010011
 102 #define ASUS_WMI_DEVID_WLAN_LED         0x00010012
 103 #define ASUS_WMI_DEVID_BLUETOOTH        0x00010013
 104 #define ASUS_WMI_DEVID_GPS              0x00010015
 105 #define ASUS_WMI_DEVID_WIMAX            0x00010017
 106 #define ASUS_WMI_DEVID_WWAN3G           0x00010019
 107 #define ASUS_WMI_DEVID_UWB              0x00010021
 108
 109 /* Leds */
 110 /* 0x000200XX and 0x000400XX */
 111 #define ASUS_WMI_DEVID_LED1             0x00020011
 112 #define ASUS_WMI_DEVID_LED2             0x00020012
 113 #define ASUS_WMI_DEVID_LED3             0x00020013
 114 #define ASUS_WMI_DEVID_LED4             0x00020014
 115 #define ASUS_WMI_DEVID_LED5             0x00020015
 116 #define ASUS_WMI_DEVID_LED6             0x00020016
 117
 118 /* Backlight and Brightness */
 119 #define ASUS_WMI_DEVID_BACKLIGHT        0x00050011
 120 #define ASUS_WMI_DEVID_BRIGHTNESS       0x00050012
 121 #define ASUS_WMI_DEVID_KBD_BACKLIGHT    0x00050021
 122 #define ASUS_WMI_DEVID_LIGHT_SENSOR     0x00050022 /* ?? */
 123
 124 /* Misc */
 125 #define ASUS_WMI_DEVID_CAMERA           0x00060013
 126
 127 /* Storage */
 128 #define ASUS_WMI_DEVID_CARDREADER       0x00080013
 129
 130 /* Input */
 131 #define ASUS_WMI_DEVID_TOUCHPAD         0x00100011
 132 #define ASUS_WMI_DEVID_TOUCHPAD_LED     0x00100012
 133
 134 /* Fan, Thermal */
 135 #define ASUS_WMI_DEVID_THERMAL_CTRL     0x00110011
 136 #define ASUS_WMI_DEVID_FAN_CTRL         0x00110012
 137
 138 /* Power */
 139 #define ASUS_WMI_DEVID_PROCESSOR_STATE  0x00120012
 140
 141 /* Deep S3 / Resume on LID open */
 142 #define ASUS_WMI_DEVID_LID_RESUME       0x00120031
 143
 144 /* DSTS masks */
 145 #define ASUS_WMI_DSTS_STATUS_BIT        0x00000001
 146 #define ASUS_WMI_DSTS_UNKNOWN_BIT       0x00000002
 147 #define ASUS_WMI_DSTS_PRESENCE_BIT      0x00010000
 148 #define ASUS_WMI_DSTS_USER_BIT          0x00020000
 149 #define ASUS_WMI_DSTS_BIOS_BIT          0x00040000
 150 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK   0x000000FF
 151 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK   0x0000FF00
 152
 153 struct bios_args {
 154         u32 arg0;
 155         u32 arg1;
 156 } __packed;
 157
 158 /*
 159  * <platform>/    - debugfs root directory
 160  *   dev_id      - current dev_id
 161  *   ctrl_param  - current ctrl_param
 162  *   method_id   - current method_id
 163  *   devs        - call DEVS(dev_id, ctrl_param) and print result
 164  *   dsts        - call DSTS(dev_id)  and print result
 165  *   call        - call method_id(dev_id, ctrl_param) and print result
 166  */
 167 struct asus_wmi_debug {
 168         struct dentry *root;
 169         u32 method_id;
 170         u32 dev_id;
 171         u32 ctrl_param;
 172 };
 173
 174 struct asus_rfkill {
 175         struct asus_wmi *asus;
 176         struct rfkill *rfkill;
 177         u32 dev_id;
 178 };
 179
 180 struct asus_wmi {
 181         int dsts_id;
 182         int spec;
 183         int sfun;
 184
 185         struct input_dev *inputdev;
 186         struct backlight_device *backlight_device;
 187         struct device *hwmon_device;
 188         struct platform_device *platform_device;
 189
 190         struct led_classdev tpd_led;
 191         int tpd_led_wk;
 192         struct led_classdev kbd_led;
 193         int kbd_led_wk;
 194         struct workqueue_struct *led_workqueue;
 195         struct work_struct tpd_led_work;
 196         struct work_struct kbd_led_work;
 197
 198         struct asus_rfkill wlan;
 199         struct asus_rfkill bluetooth;
 200         struct asus_rfkill wimax;
 201         struct asus_rfkill wwan3g;
 202         struct asus_rfkill gps;
 203         struct asus_rfkill uwb;
 204
 205         struct hotplug_slot *hotplug_slot;
 206         struct mutex hotplug_lock;
 207         struct mutex wmi_lock;
 208         struct workqueue_struct *hotplug_workqueue;
 209         struct work_struct hotplug_work;
 210
 211         struct asus_wmi_debug debug;
 212
 213         struct asus_wmi_driver *driver;
 214 };
 215
 216 static int asus_wmi_input_init(struct asus_wmi *asus)
 217 {
 218         int err;
 219
 220         asus->inputdev = input_allocate_device();
 221         if (!asus->inputdev)
 222                 return -ENOMEM;
 223
 224         asus->inputdev->name = asus->driver->input_name;
 225         asus->inputdev->phys = asus->driver->input_phys;
 226         asus->inputdev->id.bustype = BUS_HOST;
 227         asus->inputdev->dev.parent = &asus->platform_device->dev;
 228         set_bit(EV_REP, asus->inputdev->evbit);
 229
 230         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
 231         if (err)
 232                 goto err_free_dev;
 233
 234         err = input_register_device(asus->inputdev);
 235         if (err)
 236                 goto err_free_keymap;
 237
 238         return 0;
 239
 240 err_free_keymap:
 241         sparse_keymap_free(asus->inputdev);
 242 err_free_dev:
 243         input_free_device(asus->inputdev);
 244         return err;
 245 }
 246
 247 static void asus_wmi_input_exit(struct asus_wmi *asus)
 248 {
 249         if (asus->inputdev) {
 250                 sparse_keymap_free(asus->inputdev);
 251                 input_unregister_device(asus->inputdev);
 252         }
 253
 254         asus->inputdev = NULL;
 255 }
 256
 257 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
 258                                     u32 *retval)
 259 {
 260         struct bios_args args = {
 261                 .arg0 = arg0,
 262                 .arg1 = arg1,
 263         };
 264         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
 265         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
 266         acpi_status status;
 267         union acpi_object *obj;
 268         u32 tmp;
 269
 270         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
 271                                      &input, &output);
 272
 273         if (ACPI_FAILURE(status))
 274                 goto exit;
 275
 276         obj = (union acpi_object *)output.pointer;
 277         if (obj && obj->type == ACPI_TYPE_INTEGER)
 278                 tmp = (u32) obj->integer.value;
 279         else
 280                 tmp = 0;
 281
 282         if (retval)
 283                 *retval = tmp;
 284
 285         kfree(obj);
 286
 287 exit:
 288         if (ACPI_FAILURE(status))
 289                 return -EIO;
 290
 291         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
 292                 return -ENODEV;
 293
 294         return 0;
 295 }
 296
 297 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
 298 {
 299         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
 300 }
 301
 302 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
 303                                  u32 *retval)
 304 {
 305         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
 306                                         ctrl_param, retval);
 307 }
 308
 309 /* Helper for special devices with magic return codes */
 310 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
 311                                       u32 dev_id, u32 mask)
 312 {
 313         u32 retval = 0;
 314         int err;
 315
 316         err = asus_wmi_get_devstate(asus, dev_id, &retval);
 317
 318         if (err < 0)
 319                 return err;
 320
 321         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
 322                 return -ENODEV;
 323
 324         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
 325                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
 326                         return -ENODEV;
 327         }
 328
 329         return retval & mask;
 330 }
 331
 332 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
 333 {
 334         return asus_wmi_get_devstate_bits(asus, dev_id,
 335                                           ASUS_WMI_DSTS_STATUS_BIT);
 336 }
 337
 338 /*
 339  * LEDs
 340  */
 341 /*
 342  * These functions actually update the LED's, and are called from a
 343  * workqueue. By doing this as separate work rather than when the LED
 344  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 345  * potentially bad time, such as a timer interrupt.
 346  */
 347 static void tpd_led_update(struct work_struct *work)
 348 {
 349         int ctrl_param;
 350         struct asus_wmi *asus;
 351
 352         asus = container_of(work, struct asus_wmi, tpd_led_work);
 353
 354         ctrl_param = asus->tpd_led_wk;
 355         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
 356 }
 357
 358 static void tpd_led_set(struct led_classdev *led_cdev,
 359                         enum led_brightness value)
 360 {
 361         struct asus_wmi *asus;
 362
 363         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 364
 365         asus->tpd_led_wk = !!value;
 366         queue_work(asus->led_workqueue, &asus->tpd_led_work);
 367 }
 368
 369 static int read_tpd_led_state(struct asus_wmi *asus)
 370 {
 371         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
 372 }
 373
 374 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 375 {
 376         struct asus_wmi *asus;
 377
 378         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
 379
 380         return read_tpd_led_state(asus);
 381 }
 382
 383 static void kbd_led_update(struct work_struct *work)
 384 {
 385         int ctrl_param = 0;
 386         struct asus_wmi *asus;
 387
 388         asus = container_of(work, struct asus_wmi, kbd_led_work);
 389
 390         /*
 391          * bits 0-2: level
 392          * bit 7: light on/off
 393          */
 394         if (asus->kbd_led_wk > 0)
 395                 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
 396
 397         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
 398 }
 399
 400 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 401 {
 402         int retval;
 403
 404         /*
 405          * bits 0-2: level
 406          * bit 7: light on/off
 407          * bit 8-10: environment (0: dark, 1: normal, 2: light)
 408          * bit 17: status unknown
 409          */
 410         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
 411                                             0xFFFF);
 412
 413         /* Unknown status is considered as off */
 414         if (retval == 0x8000)
 415                 retval = 0;
 416
 417         if (retval >= 0) {
 418                 if (level)
 419                         *level = retval & 0x7F;
 420                 if (env)
 421                         *env = (retval >> 8) & 0x7F;
 422                 retval = 0;
 423         }
 424
 425         return retval;
 426 }
 427
 428 static void kbd_led_set(struct led_classdev *led_cdev,
 429                         enum led_brightness value)
 430 {
 431         struct asus_wmi *asus;
 432
 433         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 434
 435         if (value > asus->kbd_led.max_brightness)
 436                 value = asus->kbd_led.max_brightness;
 437         else if (value < 0)
 438                 value = 0;
 439
 440         asus->kbd_led_wk = value;
 441         queue_work(asus->led_workqueue, &asus->kbd_led_work);
 442 }
 443
 444 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
 445 {
 446         struct asus_wmi *asus;
 447         int retval, value;
 448
 449         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
 450
 451         retval = kbd_led_read(asus, &value, NULL);
 452
 453         if (retval < 0)
 454                 return retval;
 455
 456         return value;
 457 }
 458
 459 static void asus_wmi_led_exit(struct asus_wmi *asus)
 460 {
 461         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
 462                 led_classdev_unregister(&asus->kbd_led);
 463         if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
 464                 led_classdev_unregister(&asus->tpd_led);
 465         if (asus->led_workqueue)
 466                 destroy_workqueue(asus->led_workqueue);
 467 }
 468
 469 static int asus_wmi_led_init(struct asus_wmi *asus)
 470 {
 471         int rv = 0;
 472
 473         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 474         if (!asus->led_workqueue)
 475                 return -ENOMEM;
 476
 477         if (read_tpd_led_state(asus) >= 0) {
 478                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 479
 480                 asus->tpd_led.name = "asus::touchpad";
 481                 asus->tpd_led.brightness_set = tpd_led_set;
 482                 asus->tpd_led.brightness_get = tpd_led_get;
 483                 asus->tpd_led.max_brightness = 1;
 484
 485                 rv = led_classdev_register(&asus->platform_device->dev,
 486                                            &asus->tpd_led);
 487                 if (rv)
 488                         goto error;
 489         }
 490
 491         if (kbd_led_read(asus, NULL, NULL) >= 0) {
 492                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
 493
 494                 asus->kbd_led.name = "asus::kbd_backlight";
 495                 asus->kbd_led.brightness_set = kbd_led_set;
 496                 asus->kbd_led.brightness_get = kbd_led_get;
 497                 asus->kbd_led.max_brightness = 3;
 498
 499                 rv = led_classdev_register(&asus->platform_device->dev,
 500                                            &asus->kbd_led);
 501         }
 502
 503 error:
 504         if (rv)
 505                 asus_wmi_led_exit(asus);
 506
 507         return rv;
 508 }
 509
 510
 511 /*
 512  * PCI hotplug (for wlan rfkill)
 513  */
 514 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 515 {
 516         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 517
 518         if (result < 0)
 519                 return false;
 520         return !result;
 521 }
 522
 523 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 524 {
 525         struct pci_dev *dev;
 526         struct pci_bus *bus;
 527         bool blocked;
 528         bool absent;
 529         u32 l;
 530
 531         mutex_lock(&asus->wmi_lock);
 532         blocked = asus_wlan_rfkill_blocked(asus);
 533         mutex_unlock(&asus->wmi_lock);
 534
 535         mutex_lock(&asus->hotplug_lock);
 536
 537         if (asus->wlan.rfkill)
 538                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 539
 540         if (asus->hotplug_slot) {
 541                 bus = pci_find_bus(0, 1);
 542                 if (!bus) {
 543                         pr_warn("Unable to find PCI bus 1?\n");
 544                         goto out_unlock;
 545                 }
 546
 547                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 548                         pr_err("Unable to read PCI config space?\n");
 549                         goto out_unlock;
 550                 }
 551                 absent = (l == 0xffffffff);
 552
 553                 if (blocked != absent) {
 554                         pr_warn("BIOS says wireless lan is %s, "
 555                                 "but the pci device is %s\n",
 556                                 blocked ? "blocked" : "unblocked",
 557                                 absent ? "absent" : "present");
 558                         pr_warn("skipped wireless hotplug as probably "
 559                                 "inappropriate for this model\n");
 560                         goto out_unlock;
 561                 }
 562
 563                 if (!blocked) {
 564                         dev = pci_get_slot(bus, 0);
 565                         if (dev) {
 566                                 /* Device already present */
 567                                 pci_dev_put(dev);
 568                                 goto out_unlock;
 569                         }
 570                         dev = pci_scan_single_device(bus, 0);
 571                         if (dev) {
 572                                 pci_bus_assign_resources(bus);
 573                                 if (pci_bus_add_device(dev))
 574                                         pr_err("Unable to hotplug wifi\n");
 575                         }
 576                 } else {
 577                         dev = pci_get_slot(bus, 0);
 578                         if (dev) {
 579                                 pci_stop_and_remove_bus_device(dev);
 580                                 pci_dev_put(dev);
 581                         }
 582                 }
 583         }
 584
 585 out_unlock:
 586         mutex_unlock(&asus->hotplug_lock);
 587 }
 588
 589 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
 590 {
 591         struct asus_wmi *asus = data;
 592
 593         if (event != ACPI_NOTIFY_BUS_CHECK)
 594                 return;
 595
 596         /*
 597          * We can't call directly asus_rfkill_hotplug because most
 598          * of the time WMBC is still being executed and not reetrant.
 599          * There is currently no way to tell ACPICA that  we want this
 600          * method to be serialized, we schedule a asus_rfkill_hotplug
 601          * call later, in a safer context.
 602          */
 603         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
 604 }
 605
 606 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 607 {
 608         acpi_status status;
 609         acpi_handle handle;
 610
 611         status = acpi_get_handle(NULL, node, &handle);
 612
 613         if (ACPI_SUCCESS(status)) {
 614                 status = acpi_install_notify_handler(handle,
 615                                                      ACPI_SYSTEM_NOTIFY,
 616                                                      asus_rfkill_notify, asus);
 617                 if (ACPI_FAILURE(status))
 618                         pr_warn("Failed to register notify on %s\n", node);
 619         } else
 620                 return -ENODEV;
 621
 622         return 0;
 623 }
 624
 625 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 626 {
 627         acpi_status status = AE_OK;
 628         acpi_handle handle;
 629
 630         status = acpi_get_handle(NULL, node, &handle);
 631
 632         if (ACPI_SUCCESS(status)) {
 633                 status = acpi_remove_notify_handler(handle,
 634                                                     ACPI_SYSTEM_NOTIFY,
 635                                                     asus_rfkill_notify);
 636                 if (ACPI_FAILURE(status))
 637                         pr_err("Error removing rfkill notify handler %s\n",
 638                                node);
 639         }
 640 }
 641
 642 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
 643                                    u8 *value)
 644 {
 645         struct asus_wmi *asus = hotplug_slot->private;
 646         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 647
 648         if (result < 0)
 649                 return result;
 650
 651         *value = !!result;
 652         return 0;
 653 }
 654
 655 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 656 {
 657         kfree(hotplug_slot->info);
 658         kfree(hotplug_slot);
 659 }
 660
 661 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
 662         .owner = THIS_MODULE,
 663         .get_adapter_status = asus_get_adapter_status,
 664         .get_power_status = asus_get_adapter_status,
 665 };
 666
 667 static void asus_hotplug_work(struct work_struct *work)
 668 {
 669         struct asus_wmi *asus;
 670
 671         asus = container_of(work, struct asus_wmi, hotplug_work);
 672         asus_rfkill_hotplug(asus);
 673 }
 674
 675 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
 676 {
 677         int ret = -ENOMEM;
 678         struct pci_bus *bus = pci_find_bus(0, 1);
 679
 680         if (!bus) {
 681                 pr_err("Unable to find wifi PCI bus\n");
 682                 return -ENODEV;
 683         }
 684
 685         asus->hotplug_workqueue =
 686             create_singlethread_workqueue("hotplug_workqueue");
 687         if (!asus->hotplug_workqueue)
 688                 goto error_workqueue;
 689
 690         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
 691
 692         asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 693         if (!asus->hotplug_slot)
 694                 goto error_slot;
 695
 696         asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 697                                            GFP_KERNEL);
 698         if (!asus->hotplug_slot->info)
 699                 goto error_info;
 700
 701         asus->hotplug_slot->private = asus;
 702         asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
 703         asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
 704         asus_get_adapter_status(asus->hotplug_slot,
 705                                 &asus->hotplug_slot->info->adapter_status);
 706
 707         ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
 708         if (ret) {
 709                 pr_err("Unable to register hotplug slot - %d\n", ret);
 710                 goto error_register;
 711         }
 712
 713         return 0;
 714
 715 error_register:
 716         kfree(asus->hotplug_slot->info);
 717 error_info:
 718         kfree(asus->hotplug_slot);
 719         asus->hotplug_slot = NULL;
 720 error_slot:
 721         destroy_workqueue(asus->hotplug_workqueue);
 722 error_workqueue:
 723         return ret;
 724 }
 725
 726 /*
 727  * Rfkill devices
 728  */
 729 static int asus_rfkill_set(void *data, bool blocked)
 730 {
 731         struct asus_rfkill *priv = data;
 732         u32 ctrl_param = !blocked;
 733         u32 dev_id = priv->dev_id;
 734
 735         /*
 736          * If the user bit is set, BIOS can't set and record the wlan status,
 737          * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
 738          * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
 739          * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
 740          * while setting the wlan status through WMI.
 741          * This is also the behavior that windows app will do.
 742          */
 743         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
 744              priv->asus->driver->wlan_ctrl_by_user)
 745                 dev_id = ASUS_WMI_DEVID_WLAN_LED;
 746
 747         return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
 748 }
 749
 750 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
 751 {
 752         struct asus_rfkill *priv = data;
 753         int result;
 754
 755         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
 756
 757         if (result < 0)
 758                 return;
 759
 760         rfkill_set_sw_state(priv->rfkill, !result);
 761 }
 762
 763 static int asus_rfkill_wlan_set(void *data, bool blocked)
 764 {
 765         struct asus_rfkill *priv = data;
 766         struct asus_wmi *asus = priv->asus;
 767         int ret;
 768
 769         /*
 770          * This handler is enabled only if hotplug is enabled.
 771          * In this case, the asus_wmi_set_devstate() will
 772          * trigger a wmi notification and we need to wait
 773          * this call to finish before being able to call
 774          * any wmi method
 775          */
 776         mutex_lock(&asus->wmi_lock);
 777         ret = asus_rfkill_set(data, blocked);
 778         mutex_unlock(&asus->wmi_lock);
 779         return ret;
 780 }
 781
 782 static const struct rfkill_ops asus_rfkill_wlan_ops = {
 783         .set_block = asus_rfkill_wlan_set,
 784         .query = asus_rfkill_query,
 785 };
 786
 787 static const struct rfkill_ops asus_rfkill_ops = {
 788         .set_block = asus_rfkill_set,
 789         .query = asus_rfkill_query,
 790 };
 791
 792 static int asus_new_rfkill(struct asus_wmi *asus,
 793                            struct asus_rfkill *arfkill,
 794                            const char *name, enum rfkill_type type, int dev_id)
 795 {
 796         int result = asus_wmi_get_devstate_simple(asus, dev_id);
 797         struct rfkill **rfkill = &arfkill->rfkill;
 798
 799         if (result < 0)
 800                 return result;
 801
 802         arfkill->dev_id = dev_id;
 803         arfkill->asus = asus;
 804
 805         if (dev_id == ASUS_WMI_DEVID_WLAN &&
 806             asus->driver->quirks->hotplug_wireless)
 807                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 808                                        &asus_rfkill_wlan_ops, arfkill);
 809         else
 810                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 811                                        &asus_rfkill_ops, arfkill);
 812
 813         if (!*rfkill)
 814                 return -EINVAL;
 815
 816         rfkill_init_sw_state(*rfkill, !result);
 817         result = rfkill_register(*rfkill);
 818         if (result) {
 819                 rfkill_destroy(*rfkill);
 820                 *rfkill = NULL;
 821                 return result;
 822         }
 823         return 0;
 824 }
 825
 826 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
 827 {
 828         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 829         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 830         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 831         if (asus->wlan.rfkill) {
 832                 rfkill_unregister(asus->wlan.rfkill);
 833                 rfkill_destroy(asus->wlan.rfkill);
 834                 asus->wlan.rfkill = NULL;
 835         }
 836         /*
 837          * Refresh pci hotplug in case the rfkill state was changed after
 838          * asus_unregister_rfkill_notifier()
 839          */
 840         asus_rfkill_hotplug(asus);
 841         if (asus->hotplug_slot)
 842                 pci_hp_deregister(asus->hotplug_slot);
 843         if (asus->hotplug_workqueue)
 844                 destroy_workqueue(asus->hotplug_workqueue);
 845
 846         if (asus->bluetooth.rfkill) {
 847                 rfkill_unregister(asus->bluetooth.rfkill);
 848                 rfkill_destroy(asus->bluetooth.rfkill);
 849                 asus->bluetooth.rfkill = NULL;
 850         }
 851         if (asus->wimax.rfkill) {
 852                 rfkill_unregister(asus->wimax.rfkill);
 853                 rfkill_destroy(asus->wimax.rfkill);
 854                 asus->wimax.rfkill = NULL;
 855         }
 856         if (asus->wwan3g.rfkill) {
 857                 rfkill_unregister(asus->wwan3g.rfkill);
 858                 rfkill_destroy(asus->wwan3g.rfkill);
 859                 asus->wwan3g.rfkill = NULL;
 860         }
 861         if (asus->gps.rfkill) {
 862                 rfkill_unregister(asus->gps.rfkill);
 863                 rfkill_destroy(asus->gps.rfkill);
 864                 asus->gps.rfkill = NULL;
 865         }
 866         if (asus->uwb.rfkill) {
 867                 rfkill_unregister(asus->uwb.rfkill);
 868                 rfkill_destroy(asus->uwb.rfkill);
 869                 asus->uwb.rfkill = NULL;
 870         }
 871 }
 872
 873 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
 874 {
 875         int result = 0;
 876
 877         mutex_init(&asus->hotplug_lock);
 878         mutex_init(&asus->wmi_lock);
 879
 880         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
 881                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
 882
 883         if (result && result != -ENODEV)
 884                 goto exit;
 885
 886         result = asus_new_rfkill(asus, &asus->bluetooth,
 887                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
 888                                  ASUS_WMI_DEVID_BLUETOOTH);
 889
 890         if (result && result != -ENODEV)
 891                 goto exit;
 892
 893         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
 894                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
 895
 896         if (result && result != -ENODEV)
 897                 goto exit;
 898
 899         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
 900                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
 901
 902         if (result && result != -ENODEV)
 903                 goto exit;
 904
 905         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
 906                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
 907
 908         if (result && result != -ENODEV)
 909                 goto exit;
 910
 911         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
 912                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
 913
 914         if (result && result != -ENODEV)
 915                 goto exit;
 916
 917         if (!asus->driver->quirks->hotplug_wireless)
 918                 goto exit;
 919
 920         result = asus_setup_pci_hotplug(asus);
 921         /*
 922          * If we get -EBUSY then something else is handling the PCI hotplug -
 923          * don't fail in this case
 924          */
 925         if (result == -EBUSY)
 926                 result = 0;
 927
 928         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 929         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 930         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 931         /*
 932          * Refresh pci hotplug in case the rfkill state was changed during
 933          * setup.
 934          */
 935         asus_rfkill_hotplug(asus);
 936
 937 exit:
 938         if (result && result != -ENODEV)
 939                 asus_wmi_rfkill_exit(asus);
 940
 941         if (result == -ENODEV)
 942                 result = 0;
 943
 944         return result;
 945 }
 946
 947 /*
 948  * Hwmon device
 949  */
 950 static ssize_t asus_hwmon_pwm1(struct device *dev,
 951                                struct device_attribute *attr,
 952                                char *buf)
 953 {
 954         struct asus_wmi *asus = dev_get_drvdata(dev);
 955         u32 value;
 956         int err;
 957
 958         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
 959
 960         if (err < 0)
 961                 return err;
 962
 963         value &= 0xFF;
 964
 965         if (value == 1) /* Low Speed */
 966                 value = 85;
 967         else if (value == 2)
 968                 value = 170;
 969         else if (value == 3)
 970                 value = 255;
 971         else if (value != 0) {
 972                 pr_err("Unknown fan speed %#x", value);
 973                 value = -1;
 974         }
 975
 976         return sprintf(buf, "%d\n", value);
 977 }
 978
 979 static ssize_t asus_hwmon_temp1(struct device *dev,
 980                                 struct device_attribute *attr,
 981                                 char *buf)
 982 {
 983         struct asus_wmi *asus = dev_get_drvdata(dev);
 984         u32 value;
 985         int err;
 986
 987         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
 988
 989         if (err < 0)
 990                 return err;
 991
 992         value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
 993
 994         return sprintf(buf, "%d\n", value);
 995 }
 996
 997 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
 998 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL, 0);
 999
1000 static ssize_t
1001 show_name(struct device *dev, struct device_attribute *attr, char *buf)
1002 {
1003         return sprintf(buf, "asus\n");
1004 }
1005 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
1006
1007 static struct attribute *hwmon_attributes[] = {
1008         &sensor_dev_attr_pwm1.dev_attr.attr,
1009         &sensor_dev_attr_temp1_input.dev_attr.attr,
1010         &sensor_dev_attr_name.dev_attr.attr,
1011         NULL
1012 };
1013
1014 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1015                                           struct attribute *attr, int idx)
1016 {
1017         struct device *dev = container_of(kobj, struct device, kobj);
1018         struct platform_device *pdev = to_platform_device(dev->parent);
1019         struct asus_wmi *asus = platform_get_drvdata(pdev);
1020         bool ok = true;
1021         int dev_id = -1;
1022         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1023
1024         if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
1025                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1026         else if (attr == &sensor_dev_attr_temp1_input.dev_attr.attr)
1027                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1028
1029         if (dev_id != -1) {
1030                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1031
1032                 if (err < 0)
1033                         return 0; /* can't return negative here */
1034         }
1035
1036         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1037                 /*
1038                  * We need to find a better way, probably using sfun,
1039                  * bits or spec ...
1040                  * Currently we disable it if:
1041                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1042                  * - reverved bits are non-zero
1043                  * - sfun and presence bit are not set
1044                  */
1045                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1046                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1047                         ok = false;
1048         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1049                 /* If value is zero, something is clearly wrong */
1050                 if (value == 0)
1051                         ok = false;
1052         }
1053
1054         return ok ? attr->mode : 0;
1055 }
1056
1057 static struct attribute_group hwmon_attribute_group = {
1058         .is_visible = asus_hwmon_sysfs_is_visible,
1059         .attrs = hwmon_attributes
1060 };
1061
1062 static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
1063 {
1064         struct device *hwmon;
1065
1066         hwmon = asus->hwmon_device;
1067         if (!hwmon)
1068                 return;
1069         sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
1070         hwmon_device_unregister(hwmon);
1071         asus->hwmon_device = NULL;
1072 }
1073
1074 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1075 {
1076         struct device *hwmon;
1077         int result;
1078
1079         hwmon = hwmon_device_register(&asus->platform_device->dev);
1080         if (IS_ERR(hwmon)) {
1081                 pr_err("Could not register asus hwmon device\n");
1082                 return PTR_ERR(hwmon);
1083         }
1084         dev_set_drvdata(hwmon, asus);
1085         asus->hwmon_device = hwmon;
1086         result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
1087         if (result)
1088                 asus_wmi_hwmon_exit(asus);
1089         return result;
1090 }
1091
1092 /*
1093  * Backlight
1094  */
1095 static int read_backlight_power(struct asus_wmi *asus)
1096 {
1097         int ret;
1098         if (asus->driver->quirks->store_backlight_power)
1099                 ret = !asus->driver->panel_power;
1100         else
1101                 ret = asus_wmi_get_devstate_simple(asus,
1102                                                    ASUS_WMI_DEVID_BACKLIGHT);
1103
1104         if (ret < 0)
1105                 return ret;
1106
1107         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1108 }
1109
1110 static int read_brightness_max(struct asus_wmi *asus)
1111 {
1112         u32 retval;
1113         int err;
1114
1115         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1116
1117         if (err < 0)
1118                 return err;
1119
1120         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1121         retval >>= 8;
1122
1123         if (!retval)
1124                 return -ENODEV;
1125
1126         return retval;
1127 }
1128
1129 static int read_brightness(struct backlight_device *bd)
1130 {
1131         struct asus_wmi *asus = bl_get_data(bd);
1132         u32 retval;
1133         int err;
1134
1135         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1136
1137         if (err < 0)
1138                 return err;
1139
1140         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1141 }
1142
1143 static u32 get_scalar_command(struct backlight_device *bd)
1144 {
1145         struct asus_wmi *asus = bl_get_data(bd);
1146         u32 ctrl_param = 0;
1147
1148         if ((asus->driver->brightness < bd->props.brightness) ||
1149             bd->props.brightness == bd->props.max_brightness)
1150                 ctrl_param = 0x00008001;
1151         else if ((asus->driver->brightness > bd->props.brightness) ||
1152                  bd->props.brightness == 0)
1153                 ctrl_param = 0x00008000;
1154
1155         asus->driver->brightness = bd->props.brightness;
1156
1157         return ctrl_param;
1158 }
1159
1160 static int update_bl_status(struct backlight_device *bd)
1161 {
1162         struct asus_wmi *asus = bl_get_data(bd);
1163         u32 ctrl_param;
1164         int power, err = 0;
1165
1166         power = read_backlight_power(asus);
1167         if (power != -ENODEV && bd->props.power != power) {
1168                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1169                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1170                                             ctrl_param, NULL);
1171                 if (asus->driver->quirks->store_backlight_power)
1172                         asus->driver->panel_power = bd->props.power;
1173
1174                 /* When using scalar brightness, updating the brightness
1175                  * will mess with the backlight power */
1176                 if (asus->driver->quirks->scalar_panel_brightness)
1177                         return err;
1178         }
1179
1180         if (asus->driver->quirks->scalar_panel_brightness)
1181                 ctrl_param = get_scalar_command(bd);
1182         else
1183                 ctrl_param = bd->props.brightness;
1184
1185         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1186                                     ctrl_param, NULL);
1187
1188         return err;
1189 }
1190
1191 static const struct backlight_ops asus_wmi_bl_ops = {
1192         .get_brightness = read_brightness,
1193         .update_status = update_bl_status,
1194 };
1195
1196 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1197 {
1198         struct backlight_device *bd = asus->backlight_device;
1199         int old = bd->props.brightness;
1200         int new = old;
1201
1202         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1203                 new = code - NOTIFY_BRNUP_MIN + 1;
1204         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1205                 new = code - NOTIFY_BRNDOWN_MIN;
1206
1207         bd->props.brightness = new;
1208         backlight_update_status(bd);
1209         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1210
1211         return old;
1212 }
1213
1214 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1215 {
1216         struct backlight_device *bd;
1217         struct backlight_properties props;
1218         int max;
1219         int power;
1220
1221         max = read_brightness_max(asus);
1222
1223         if (max == -ENODEV)
1224                 max = 0;
1225         else if (max < 0)
1226                 return max;
1227
1228         power = read_backlight_power(asus);
1229
1230         if (power == -ENODEV)
1231                 power = FB_BLANK_UNBLANK;
1232         else if (power < 0)
1233                 return power;
1234
1235         memset(&props, 0, sizeof(struct backlight_properties));
1236         props.type = BACKLIGHT_PLATFORM;
1237         props.max_brightness = max;
1238         bd = backlight_device_register(asus->driver->name,
1239                                        &asus->platform_device->dev, asus,
1240                                        &asus_wmi_bl_ops, &props);
1241         if (IS_ERR(bd)) {
1242                 pr_err("Could not register backlight device\n");
1243                 return PTR_ERR(bd);
1244         }
1245
1246         asus->backlight_device = bd;
1247
1248         if (asus->driver->quirks->store_backlight_power)
1249                 asus->driver->panel_power = power;
1250
1251         bd->props.brightness = read_brightness(bd);
1252         bd->props.power = power;
1253         backlight_update_status(bd);
1254
1255         asus->driver->brightness = bd->props.brightness;
1256
1257         return 0;
1258 }
1259
1260 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1261 {
1262         if (asus->backlight_device)
1263                 backlight_device_unregister(asus->backlight_device);
1264
1265         asus->backlight_device = NULL;
1266 }
1267
1268 static void asus_wmi_notify(u32 value, void *context)
1269 {
1270         struct asus_wmi *asus = context;
1271         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1272         union acpi_object *obj;
1273         acpi_status status;
1274         int code;
1275         int orig_code;
1276         unsigned int key_value = 1;
1277         bool autorelease = 1;
1278
1279         status = wmi_get_event_data(value, &response);
1280         if (status != AE_OK) {
1281                 pr_err("bad event status 0x%x\n", status);
1282                 return;
1283         }
1284
1285         obj = (union acpi_object *)response.pointer;
1286
1287         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1288                 goto exit;
1289
1290         code = obj->integer.value;
1291         orig_code = code;
1292
1293         if (asus->driver->key_filter) {
1294                 asus->driver->key_filter(asus->driver, &code, &key_value,
1295                                          &autorelease);
1296                 if (code == ASUS_WMI_KEY_IGNORE)
1297                         goto exit;
1298         }
1299
1300         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1301                 code = NOTIFY_BRNUP_MIN;
1302         else if (code >= NOTIFY_BRNDOWN_MIN &&
1303                  code <= NOTIFY_BRNDOWN_MAX)
1304                 code = NOTIFY_BRNDOWN_MIN;
1305
1306         if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
1307                 if (!acpi_video_backlight_support())
1308                         asus_wmi_backlight_notify(asus, orig_code);
1309         } else if (!sparse_keymap_report_event(asus->inputdev, code,
1310                                                key_value, autorelease))
1311                 pr_info("Unknown key %x pressed\n", code);
1312
1313 exit:
1314         kfree(obj);
1315 }
1316
1317 /*
1318  * Sys helpers
1319  */
1320 static int parse_arg(const char *buf, unsigned long count, int *val)
1321 {
1322         if (!count)
1323                 return 0;
1324         if (sscanf(buf, "%i", val) != 1)
1325                 return -EINVAL;
1326         return count;
1327 }
1328
1329 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1330                              const char *buf, size_t count)
1331 {
1332         u32 retval;
1333         int rv, err, value;
1334
1335         value = asus_wmi_get_devstate_simple(asus, devid);
1336         if (value == -ENODEV)   /* Check device presence */
1337                 return value;
1338
1339         rv = parse_arg(buf, count, &value);
1340         err = asus_wmi_set_devstate(devid, value, &retval);
1341
1342         if (err < 0)
1343                 return err;
1344
1345         return rv;
1346 }
1347
1348 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1349 {
1350         int value = asus_wmi_get_devstate_simple(asus, devid);
1351
1352         if (value < 0)
1353                 return value;
1354
1355         return sprintf(buf, "%d\n", value);
1356 }
1357
1358 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1359         static ssize_t show_##_name(struct device *dev,                 \
1360                                     struct device_attribute *attr,      \
1361                                     char *buf)                          \
1362         {                                                               \
1363                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1364                                                                         \
1365                 return show_sys_wmi(asus, _cm, buf);                    \
1366         }                                                               \
1367         static ssize_t store_##_name(struct device *dev,                \
1368                                      struct device_attribute *attr,     \
1369                                      const char *buf, size_t count)     \
1370         {                                                               \
1371                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1372                                                                         \
1373                 return store_sys_wmi(asus, _cm, buf, count);            \
1374         }                                                               \
1375         static struct device_attribute dev_attr_##_name = {             \
1376                 .attr = {                                               \
1377                         .name = __stringify(_name),                     \
1378                         .mode = _mode },                                \
1379                 .show   = show_##_name,                                 \
1380                 .store  = store_##_name,                                \
1381         }
1382
1383 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1384 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1385 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1386 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1387
1388 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1389                            const char *buf, size_t count)
1390 {
1391         int value, rv;
1392
1393         if (!count || sscanf(buf, "%i", &value) != 1)
1394                 return -EINVAL;
1395         if (value < 0 || value > 2)
1396                 return -EINVAL;
1397
1398         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1399         if (rv < 0)
1400                 return rv;
1401
1402         return count;
1403 }
1404
1405 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1406
1407 static struct attribute *platform_attributes[] = {
1408         &dev_attr_cpufv.attr,
1409         &dev_attr_camera.attr,
1410         &dev_attr_cardr.attr,
1411         &dev_attr_touchpad.attr,
1412         &dev_attr_lid_resume.attr,
1413         NULL
1414 };
1415
1416 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1417                                     struct attribute *attr, int idx)
1418 {
1419         struct device *dev = container_of(kobj, struct device, kobj);
1420         struct platform_device *pdev = to_platform_device(dev);
1421         struct asus_wmi *asus = platform_get_drvdata(pdev);
1422         bool ok = true;
1423         int devid = -1;
1424
1425         if (attr == &dev_attr_camera.attr)
1426                 devid = ASUS_WMI_DEVID_CAMERA;
1427         else if (attr == &dev_attr_cardr.attr)
1428                 devid = ASUS_WMI_DEVID_CARDREADER;
1429         else if (attr == &dev_attr_touchpad.attr)
1430                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1431         else if (attr == &dev_attr_lid_resume.attr)
1432                 devid = ASUS_WMI_DEVID_LID_RESUME;
1433
1434         if (devid != -1)
1435                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1436
1437         return ok ? attr->mode : 0;
1438 }
1439
1440 static struct attribute_group platform_attribute_group = {
1441         .is_visible = asus_sysfs_is_visible,
1442         .attrs = platform_attributes
1443 };
1444
1445 static void asus_wmi_sysfs_exit(struct platform_device *device)
1446 {
1447         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1448 }
1449
1450 static int asus_wmi_sysfs_init(struct platform_device *device)
1451 {
1452         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1453 }
1454
1455 /*
1456  * Platform device
1457  */
1458 static int asus_wmi_platform_init(struct asus_wmi *asus)
1459 {
1460         int rv;
1461
1462         /* INIT enable hotkeys on some models */
1463         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1464                 pr_info("Initialization: %#x", rv);
1465
1466         /* We don't know yet what to do with this version... */
1467         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1468                 pr_info("BIOS WMI version: %d.%d", rv >> 16, rv & 0xFF);
1469                 asus->spec = rv;
1470         }
1471
1472         /*
1473          * The SFUN method probably allows the original driver to get the list
1474          * of features supported by a given model. For now, 0x0100 or 0x0800
1475          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1476          * The significance of others is yet to be found.
1477          */
1478         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1479                 pr_info("SFUN value: %#x", rv);
1480                 asus->sfun = rv;
1481         }
1482
1483         /*
1484          * Eee PC and Notebooks seems to have different method_id for DSTS,
1485          * but it may also be related to the BIOS's SPEC.
1486          * Note, on most Eeepc, there is no way to check if a method exist
1487          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1488          * but once again, SPEC may probably be used for that kind of things.
1489          */
1490         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1491                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1492         else
1493                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1494
1495         /* CWAP allow to define the behavior of the Fn+F2 key,
1496          * this method doesn't seems to be present on Eee PCs */
1497         if (asus->driver->quirks->wapf >= 0)
1498                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1499                                       asus->driver->quirks->wapf, NULL);
1500
1501         return asus_wmi_sysfs_init(asus->platform_device);
1502 }
1503
1504 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1505 {
1506         asus_wmi_sysfs_exit(asus->platform_device);
1507 }
1508
1509 /*
1510  * debugfs
1511  */
1512 struct asus_wmi_debugfs_node {
1513         struct asus_wmi *asus;
1514         char *name;
1515         int (*show) (struct seq_file *m, void *data);
1516 };
1517
1518 static int show_dsts(struct seq_file *m, void *data)
1519 {
1520         struct asus_wmi *asus = m->private;
1521         int err;
1522         u32 retval = -1;
1523
1524         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1525
1526         if (err < 0)
1527                 return err;
1528
1529         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1530
1531         return 0;
1532 }
1533
1534 static int show_devs(struct seq_file *m, void *data)
1535 {
1536         struct asus_wmi *asus = m->private;
1537         int err;
1538         u32 retval = -1;
1539
1540         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1541                                     &retval);
1542
1543         if (err < 0)
1544                 return err;
1545
1546         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1547                    asus->debug.ctrl_param, retval);
1548
1549         return 0;
1550 }
1551
1552 static int show_call(struct seq_file *m, void *data)
1553 {
1554         struct asus_wmi *asus = m->private;
1555         struct bios_args args = {
1556                 .arg0 = asus->debug.dev_id,
1557                 .arg1 = asus->debug.ctrl_param,
1558         };
1559         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1560         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1561         union acpi_object *obj;
1562         acpi_status status;
1563
1564         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1565                                      1, asus->debug.method_id,
1566                                      &input, &output);
1567
1568         if (ACPI_FAILURE(status))
1569                 return -EIO;
1570
1571         obj = (union acpi_object *)output.pointer;
1572         if (obj && obj->type == ACPI_TYPE_INTEGER)
1573                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1574                            asus->debug.dev_id, asus->debug.ctrl_param,
1575                            (u32) obj->integer.value);
1576         else
1577                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1578                            asus->debug.dev_id, asus->debug.ctrl_param,
1579                            obj ? obj->type : -1);
1580
1581         kfree(obj);
1582
1583         return 0;
1584 }
1585
1586 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1587         {NULL, "devs", show_devs},
1588         {NULL, "dsts", show_dsts},
1589         {NULL, "call", show_call},
1590 };
1591
1592 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1593 {
1594         struct asus_wmi_debugfs_node *node = inode->i_private;
1595
1596         return single_open(file, node->show, node->asus);
1597 }
1598
1599 static const struct file_operations asus_wmi_debugfs_io_ops = {
1600         .owner = THIS_MODULE,
1601         .open = asus_wmi_debugfs_open,
1602         .read = seq_read,
1603         .llseek = seq_lseek,
1604         .release = single_release,
1605 };
1606
1607 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1608 {
1609         debugfs_remove_recursive(asus->debug.root);
1610 }
1611
1612 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1613 {
1614         struct dentry *dent;
1615         int i;
1616
1617         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1618         if (!asus->debug.root) {
1619                 pr_err("failed to create debugfs directory");
1620                 goto error_debugfs;
1621         }
1622
1623         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1624                                   asus->debug.root, &asus->debug.method_id);
1625         if (!dent)
1626                 goto error_debugfs;
1627
1628         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1629                                   asus->debug.root, &asus->debug.dev_id);
1630         if (!dent)
1631                 goto error_debugfs;
1632
1633         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1634                                   asus->debug.root, &asus->debug.ctrl_param);
1635         if (!dent)
1636                 goto error_debugfs;
1637
1638         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1639                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1640
1641                 node->asus = asus;
1642                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1643                                            asus->debug.root, node,
1644                                            &asus_wmi_debugfs_io_ops);
1645                 if (!dent) {
1646                         pr_err("failed to create debug file: %s\n", node->name);
1647                         goto error_debugfs;
1648                 }
1649         }
1650
1651         return 0;
1652
1653 error_debugfs:
1654         asus_wmi_debugfs_exit(asus);
1655         return -ENOMEM;
1656 }
1657
1658 /*
1659  * WMI Driver
1660  */
1661 static int asus_wmi_add(struct platform_device *pdev)
1662 {
1663         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1664         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1665         struct asus_wmi *asus;
1666         acpi_status status;
1667         int err;
1668         u32 result;
1669
1670         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1671         if (!asus)
1672                 return -ENOMEM;
1673
1674         asus->driver = wdrv;
1675         asus->platform_device = pdev;
1676         wdrv->platform_device = pdev;
1677         platform_set_drvdata(asus->platform_device, asus);
1678
1679         if (wdrv->detect_quirks)
1680                 wdrv->detect_quirks(asus->driver);
1681
1682         err = asus_wmi_platform_init(asus);
1683         if (err)
1684                 goto fail_platform;
1685
1686         err = asus_wmi_input_init(asus);
1687         if (err)
1688                 goto fail_input;
1689
1690         err = asus_wmi_hwmon_init(asus);
1691         if (err)
1692                 goto fail_hwmon;
1693
1694         err = asus_wmi_led_init(asus);
1695         if (err)
1696                 goto fail_leds;
1697
1698         err = asus_wmi_rfkill_init(asus);
1699         if (err)
1700                 goto fail_rfkill;
1701
1702         if (asus->driver->quirks->wmi_backlight_power)
1703                 acpi_video_dmi_promote_vendor();
1704         if (!acpi_video_backlight_support()) {
1705                 pr_info("Disabling ACPI video driver\n");
1706                 acpi_video_unregister();
1707                 err = asus_wmi_backlight_init(asus);
1708                 if (err && err != -ENODEV)
1709                         goto fail_backlight;
1710         } else
1711                 pr_info("Backlight controlled by ACPI video driver\n");
1712
1713         status = wmi_install_notify_handler(asus->driver->event_guid,
1714                                             asus_wmi_notify, asus);
1715         if (ACPI_FAILURE(status)) {
1716                 pr_err("Unable to register notify handler - %d\n", status);
1717                 err = -ENODEV;
1718                 goto fail_wmi_handler;
1719         }
1720
1721         err = asus_wmi_debugfs_init(asus);
1722         if (err)
1723                 goto fail_debugfs;
1724
1725         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
1726         if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
1727                 asus->driver->wlan_ctrl_by_user = 1;
1728
1729         return 0;
1730
1731 fail_debugfs:
1732         wmi_remove_notify_handler(asus->driver->event_guid);
1733 fail_wmi_handler:
1734         asus_wmi_backlight_exit(asus);
1735 fail_backlight:
1736         asus_wmi_rfkill_exit(asus);
1737 fail_rfkill:
1738         asus_wmi_led_exit(asus);
1739 fail_leds:
1740         asus_wmi_hwmon_exit(asus);
1741 fail_hwmon:
1742         asus_wmi_input_exit(asus);
1743 fail_input:
1744         asus_wmi_platform_exit(asus);
1745 fail_platform:
1746         kfree(asus);
1747         return err;
1748 }
1749
1750 static int asus_wmi_remove(struct platform_device *device)
1751 {
1752         struct asus_wmi *asus;
1753
1754         asus = platform_get_drvdata(device);
1755         wmi_remove_notify_handler(asus->driver->event_guid);
1756         asus_wmi_backlight_exit(asus);
1757         asus_wmi_input_exit(asus);
1758         asus_wmi_hwmon_exit(asus);
1759         asus_wmi_led_exit(asus);
1760         asus_wmi_rfkill_exit(asus);
1761         asus_wmi_debugfs_exit(asus);
1762         asus_wmi_platform_exit(asus);
1763
1764         kfree(asus);
1765         return 0;
1766 }
1767
1768 /*
1769  * Platform driver - hibernate/resume callbacks
1770  */
1771 static int asus_hotk_thaw(struct device *device)
1772 {
1773         struct asus_wmi *asus = dev_get_drvdata(device);
1774
1775         if (asus->wlan.rfkill) {
1776                 bool wlan;
1777
1778                 /*
1779                  * Work around bios bug - acpi _PTS turns off the wireless led
1780                  * during suspend.  Normally it restores it on resume, but
1781                  * we should kick it ourselves in case hibernation is aborted.
1782                  */
1783                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1784                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1785         }
1786
1787         return 0;
1788 }
1789
1790 static int asus_hotk_restore(struct device *device)
1791 {
1792         struct asus_wmi *asus = dev_get_drvdata(device);
1793         int bl;
1794
1795         /* Refresh both wlan rfkill state and pci hotplug */
1796         if (asus->wlan.rfkill)
1797                 asus_rfkill_hotplug(asus);
1798
1799         if (asus->bluetooth.rfkill) {
1800                 bl = !asus_wmi_get_devstate_simple(asus,
1801                                                    ASUS_WMI_DEVID_BLUETOOTH);
1802                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1803         }
1804         if (asus->wimax.rfkill) {
1805                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1806                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1807         }
1808         if (asus->wwan3g.rfkill) {
1809                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1810                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1811         }
1812         if (asus->gps.rfkill) {
1813                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1814                 rfkill_set_sw_state(asus->gps.rfkill, bl);
1815         }
1816         if (asus->uwb.rfkill) {
1817                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1818                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1819         }
1820
1821         return 0;
1822 }
1823
1824 static const struct dev_pm_ops asus_pm_ops = {
1825         .thaw = asus_hotk_thaw,
1826         .restore = asus_hotk_restore,
1827 };
1828
1829 static int asus_wmi_probe(struct platform_device *pdev)
1830 {
1831         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1832         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1833         int ret;
1834
1835         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1836                 pr_warn("Management GUID not found\n");
1837                 return -ENODEV;
1838         }
1839
1840         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1841                 pr_warn("Event GUID not found\n");
1842                 return -ENODEV;
1843         }
1844
1845         if (wdrv->probe) {
1846                 ret = wdrv->probe(pdev);
1847                 if (ret)
1848                         return ret;
1849         }
1850
1851         return asus_wmi_add(pdev);
1852 }
1853
1854 static bool used;
1855
1856 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1857 {
1858         struct platform_driver *platform_driver;
1859         struct platform_device *platform_device;
1860
1861         if (used)
1862                 return -EBUSY;
1863
1864         platform_driver = &driver->platform_driver;
1865         platform_driver->remove = asus_wmi_remove;
1866         platform_driver->driver.owner = driver->owner;
1867         platform_driver->driver.name = driver->name;
1868         platform_driver->driver.pm = &asus_pm_ops;
1869
1870         platform_device = platform_create_bundle(platform_driver,
1871                                                  asus_wmi_probe,
1872                                                  NULL, 0, NULL, 0);
1873         if (IS_ERR(platform_device))
1874                 return PTR_ERR(platform_device);
1875
1876         used = true;
1877         return 0;
1878 }
1879 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1880
1881 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1882 {
1883         platform_device_unregister(driver->platform_device);
1884         platform_driver_unregister(&driver->platform_driver);
1885         used = false;
1886 }
1887 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1888
1889 static int __init asus_wmi_init(void)
1890 {
1891         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1892                 pr_info("Asus Management GUID not found");
1893                 return -ENODEV;
1894         }
1895
1896         pr_info("ASUS WMI generic driver loaded");
1897         return 0;
1898 }
1899
1900 static void __exit asus_wmi_exit(void)
1901 {
1902         pr_info("ASUS WMI generic driver unloaded");
1903 }
1904
1905 module_init(asus_wmi_init);
1906 module_exit(asus_wmi_exit);