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