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 (asus->tpd_led.dev)
 457                 led_classdev_unregister(&asus->tpd_led);
 458         if (asus->led_workqueue)
 459                 destroy_workqueue(asus->led_workqueue);
 460 }
 461
 462 static int asus_wmi_led_init(struct asus_wmi *asus)
 463 {
 464         int rv = 0;
 465
 466         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
 467         if (!asus->led_workqueue)
 468                 return -ENOMEM;
 469
 470         if (read_tpd_led_state(asus) >= 0) {
 471                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
 472
 473                 asus->tpd_led.name = "asus::touchpad";
 474                 asus->tpd_led.brightness_set = tpd_led_set;
 475                 asus->tpd_led.brightness_get = tpd_led_get;
 476                 asus->tpd_led.max_brightness = 1;
 477
 478                 rv = led_classdev_register(&asus->platform_device->dev,
 479                                            &asus->tpd_led);
 480                 if (rv)
 481                         goto error;
 482         }
 483
 484         if (kbd_led_read(asus, NULL, NULL) >= 0) {
 485                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
 486
 487                 asus->kbd_led.name = "asus::kbd_backlight";
 488                 asus->kbd_led.brightness_set = kbd_led_set;
 489                 asus->kbd_led.brightness_get = kbd_led_get;
 490                 asus->kbd_led.max_brightness = 3;
 491
 492                 rv = led_classdev_register(&asus->platform_device->dev,
 493                                            &asus->kbd_led);
 494         }
 495
 496 error:
 497         if (rv)
 498                 asus_wmi_led_exit(asus);
 499
 500         return rv;
 501 }
 502
 503
 504 /*
 505  * PCI hotplug (for wlan rfkill)
 506  */
 507 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
 508 {
 509         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 510
 511         if (result < 0)
 512                 return false;
 513         return !result;
 514 }
 515
 516 static void asus_rfkill_hotplug(struct asus_wmi *asus)
 517 {
 518         struct pci_dev *dev;
 519         struct pci_bus *bus;
 520         bool blocked;
 521         bool absent;
 522         u32 l;
 523
 524         mutex_lock(&asus->wmi_lock);
 525         blocked = asus_wlan_rfkill_blocked(asus);
 526         mutex_unlock(&asus->wmi_lock);
 527
 528         mutex_lock(&asus->hotplug_lock);
 529
 530         if (asus->wlan.rfkill)
 531                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
 532
 533         if (asus->hotplug_slot) {
 534                 bus = pci_find_bus(0, 1);
 535                 if (!bus) {
 536                         pr_warn("Unable to find PCI bus 1?\n");
 537                         goto out_unlock;
 538                 }
 539
 540                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 541                         pr_err("Unable to read PCI config space?\n");
 542                         goto out_unlock;
 543                 }
 544                 absent = (l == 0xffffffff);
 545
 546                 if (blocked != absent) {
 547                         pr_warn("BIOS says wireless lan is %s, "
 548                                 "but the pci device is %s\n",
 549                                 blocked ? "blocked" : "unblocked",
 550                                 absent ? "absent" : "present");
 551                         pr_warn("skipped wireless hotplug as probably "
 552                                 "inappropriate for this model\n");
 553                         goto out_unlock;
 554                 }
 555
 556                 if (!blocked) {
 557                         dev = pci_get_slot(bus, 0);
 558                         if (dev) {
 559                                 /* Device already present */
 560                                 pci_dev_put(dev);
 561                                 goto out_unlock;
 562                         }
 563                         dev = pci_scan_single_device(bus, 0);
 564                         if (dev) {
 565                                 pci_bus_assign_resources(bus);
 566                                 if (pci_bus_add_device(dev))
 567                                         pr_err("Unable to hotplug wifi\n");
 568                         }
 569                 } else {
 570                         dev = pci_get_slot(bus, 0);
 571                         if (dev) {
 572                                 pci_remove_bus_device(dev);
 573                                 pci_dev_put(dev);
 574                         }
 575                 }
 576         }
 577
 578 out_unlock:
 579         mutex_unlock(&asus->hotplug_lock);
 580 }
 581
 582 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
 583 {
 584         struct asus_wmi *asus = data;
 585
 586         if (event != ACPI_NOTIFY_BUS_CHECK)
 587                 return;
 588
 589         /*
 590          * We can't call directly asus_rfkill_hotplug because most
 591          * of the time WMBC is still being executed and not reetrant.
 592          * There is currently no way to tell ACPICA that  we want this
 593          * method to be serialized, we schedule a asus_rfkill_hotplug
 594          * call later, in a safer context.
 595          */
 596         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
 597 }
 598
 599 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 600 {
 601         acpi_status status;
 602         acpi_handle handle;
 603
 604         status = acpi_get_handle(NULL, node, &handle);
 605
 606         if (ACPI_SUCCESS(status)) {
 607                 status = acpi_install_notify_handler(handle,
 608                                                      ACPI_SYSTEM_NOTIFY,
 609                                                      asus_rfkill_notify, asus);
 610                 if (ACPI_FAILURE(status))
 611                         pr_warn("Failed to register notify on %s\n", node);
 612         } else
 613                 return -ENODEV;
 614
 615         return 0;
 616 }
 617
 618 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 619 {
 620         acpi_status status = AE_OK;
 621         acpi_handle handle;
 622
 623         status = acpi_get_handle(NULL, node, &handle);
 624
 625         if (ACPI_SUCCESS(status)) {
 626                 status = acpi_remove_notify_handler(handle,
 627                                                     ACPI_SYSTEM_NOTIFY,
 628                                                     asus_rfkill_notify);
 629                 if (ACPI_FAILURE(status))
 630                         pr_err("Error removing rfkill notify handler %s\n",
 631                                node);
 632         }
 633 }
 634
 635 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
 636                                    u8 *value)
 637 {
 638         struct asus_wmi *asus = hotplug_slot->private;
 639         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
 640
 641         if (result < 0)
 642                 return result;
 643
 644         *value = !!result;
 645         return 0;
 646 }
 647
 648 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
 649 {
 650         kfree(hotplug_slot->info);
 651         kfree(hotplug_slot);
 652 }
 653
 654 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
 655         .owner = THIS_MODULE,
 656         .get_adapter_status = asus_get_adapter_status,
 657         .get_power_status = asus_get_adapter_status,
 658 };
 659
 660 static void asus_hotplug_work(struct work_struct *work)
 661 {
 662         struct asus_wmi *asus;
 663
 664         asus = container_of(work, struct asus_wmi, hotplug_work);
 665         asus_rfkill_hotplug(asus);
 666 }
 667
 668 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
 669 {
 670         int ret = -ENOMEM;
 671         struct pci_bus *bus = pci_find_bus(0, 1);
 672
 673         if (!bus) {
 674                 pr_err("Unable to find wifi PCI bus\n");
 675                 return -ENODEV;
 676         }
 677
 678         asus->hotplug_workqueue =
 679             create_singlethread_workqueue("hotplug_workqueue");
 680         if (!asus->hotplug_workqueue)
 681                 goto error_workqueue;
 682
 683         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
 684
 685         asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 686         if (!asus->hotplug_slot)
 687                 goto error_slot;
 688
 689         asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 690                                            GFP_KERNEL);
 691         if (!asus->hotplug_slot->info)
 692                 goto error_info;
 693
 694         asus->hotplug_slot->private = asus;
 695         asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
 696         asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
 697         asus_get_adapter_status(asus->hotplug_slot,
 698                                 &asus->hotplug_slot->info->adapter_status);
 699
 700         ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
 701         if (ret) {
 702                 pr_err("Unable to register hotplug slot - %d\n", ret);
 703                 goto error_register;
 704         }
 705
 706         return 0;
 707
 708 error_register:
 709         kfree(asus->hotplug_slot->info);
 710 error_info:
 711         kfree(asus->hotplug_slot);
 712         asus->hotplug_slot = NULL;
 713 error_slot:
 714         destroy_workqueue(asus->hotplug_workqueue);
 715 error_workqueue:
 716         return ret;
 717 }
 718
 719 /*
 720  * Rfkill devices
 721  */
 722 static int asus_rfkill_set(void *data, bool blocked)
 723 {
 724         struct asus_rfkill *priv = data;
 725         u32 ctrl_param = !blocked;
 726
 727         return asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL);
 728 }
 729
 730 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
 731 {
 732         struct asus_rfkill *priv = data;
 733         int result;
 734
 735         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
 736
 737         if (result < 0)
 738                 return;
 739
 740         rfkill_set_sw_state(priv->rfkill, !result);
 741 }
 742
 743 static int asus_rfkill_wlan_set(void *data, bool blocked)
 744 {
 745         struct asus_rfkill *priv = data;
 746         struct asus_wmi *asus = priv->asus;
 747         int ret;
 748
 749         /*
 750          * This handler is enabled only if hotplug is enabled.
 751          * In this case, the asus_wmi_set_devstate() will
 752          * trigger a wmi notification and we need to wait
 753          * this call to finish before being able to call
 754          * any wmi method
 755          */
 756         mutex_lock(&asus->wmi_lock);
 757         ret = asus_rfkill_set(data, blocked);
 758         mutex_unlock(&asus->wmi_lock);
 759         return ret;
 760 }
 761
 762 static const struct rfkill_ops asus_rfkill_wlan_ops = {
 763         .set_block = asus_rfkill_wlan_set,
 764         .query = asus_rfkill_query,
 765 };
 766
 767 static const struct rfkill_ops asus_rfkill_ops = {
 768         .set_block = asus_rfkill_set,
 769         .query = asus_rfkill_query,
 770 };
 771
 772 static int asus_new_rfkill(struct asus_wmi *asus,
 773                            struct asus_rfkill *arfkill,
 774                            const char *name, enum rfkill_type type, int dev_id)
 775 {
 776         int result = asus_wmi_get_devstate_simple(asus, dev_id);
 777         struct rfkill **rfkill = &arfkill->rfkill;
 778
 779         if (result < 0)
 780                 return result;
 781
 782         arfkill->dev_id = dev_id;
 783         arfkill->asus = asus;
 784
 785         if (dev_id == ASUS_WMI_DEVID_WLAN && asus->driver->hotplug_wireless)
 786                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 787                                        &asus_rfkill_wlan_ops, arfkill);
 788         else
 789                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 790                                        &asus_rfkill_ops, arfkill);
 791
 792         if (!*rfkill)
 793                 return -EINVAL;
 794
 795         rfkill_init_sw_state(*rfkill, !result);
 796         result = rfkill_register(*rfkill);
 797         if (result) {
 798                 rfkill_destroy(*rfkill);
 799                 *rfkill = NULL;
 800                 return result;
 801         }
 802         return 0;
 803 }
 804
 805 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
 806 {
 807         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 808         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 809         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 810         if (asus->wlan.rfkill) {
 811                 rfkill_unregister(asus->wlan.rfkill);
 812                 rfkill_destroy(asus->wlan.rfkill);
 813                 asus->wlan.rfkill = NULL;
 814         }
 815         /*
 816          * Refresh pci hotplug in case the rfkill state was changed after
 817          * asus_unregister_rfkill_notifier()
 818          */
 819         asus_rfkill_hotplug(asus);
 820         if (asus->hotplug_slot)
 821                 pci_hp_deregister(asus->hotplug_slot);
 822         if (asus->hotplug_workqueue)
 823                 destroy_workqueue(asus->hotplug_workqueue);
 824
 825         if (asus->bluetooth.rfkill) {
 826                 rfkill_unregister(asus->bluetooth.rfkill);
 827                 rfkill_destroy(asus->bluetooth.rfkill);
 828                 asus->bluetooth.rfkill = NULL;
 829         }
 830         if (asus->wimax.rfkill) {
 831                 rfkill_unregister(asus->wimax.rfkill);
 832                 rfkill_destroy(asus->wimax.rfkill);
 833                 asus->wimax.rfkill = NULL;
 834         }
 835         if (asus->wwan3g.rfkill) {
 836                 rfkill_unregister(asus->wwan3g.rfkill);
 837                 rfkill_destroy(asus->wwan3g.rfkill);
 838                 asus->wwan3g.rfkill = NULL;
 839         }
 840         if (asus->gps.rfkill) {
 841                 rfkill_unregister(asus->gps.rfkill);
 842                 rfkill_destroy(asus->gps.rfkill);
 843                 asus->gps.rfkill = NULL;
 844         }
 845         if (asus->uwb.rfkill) {
 846                 rfkill_unregister(asus->uwb.rfkill);
 847                 rfkill_destroy(asus->uwb.rfkill);
 848                 asus->uwb.rfkill = NULL;
 849         }
 850 }
 851
 852 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
 853 {
 854         int result = 0;
 855
 856         mutex_init(&asus->hotplug_lock);
 857         mutex_init(&asus->wmi_lock);
 858
 859         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
 860                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
 861
 862         if (result && result != -ENODEV)
 863                 goto exit;
 864
 865         result = asus_new_rfkill(asus, &asus->bluetooth,
 866                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
 867                                  ASUS_WMI_DEVID_BLUETOOTH);
 868
 869         if (result && result != -ENODEV)
 870                 goto exit;
 871
 872         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
 873                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
 874
 875         if (result && result != -ENODEV)
 876                 goto exit;
 877
 878         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
 879                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
 880
 881         if (result && result != -ENODEV)
 882                 goto exit;
 883
 884         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
 885                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
 886
 887         if (result && result != -ENODEV)
 888                 goto exit;
 889
 890         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
 891                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
 892
 893         if (result && result != -ENODEV)
 894                 goto exit;
 895
 896         if (!asus->driver->hotplug_wireless)
 897                 goto exit;
 898
 899         result = asus_setup_pci_hotplug(asus);
 900         /*
 901          * If we get -EBUSY then something else is handling the PCI hotplug -
 902          * don't fail in this case
 903          */
 904         if (result == -EBUSY)
 905                 result = 0;
 906
 907         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 908         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 909         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 910         /*
 911          * Refresh pci hotplug in case the rfkill state was changed during
 912          * setup.
 913          */
 914         asus_rfkill_hotplug(asus);
 915
 916 exit:
 917         if (result && result != -ENODEV)
 918                 asus_wmi_rfkill_exit(asus);
 919
 920         if (result == -ENODEV)
 921                 result = 0;
 922
 923         return result;
 924 }
 925
 926 /*
 927  * Hwmon device
 928  */
 929 static ssize_t asus_hwmon_pwm1(struct device *dev,
 930                                struct device_attribute *attr,
 931                                char *buf)
 932 {
 933         struct asus_wmi *asus = dev_get_drvdata(dev);
 934         u32 value;
 935         int err;
 936
 937         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
 938
 939         if (err < 0)
 940                 return err;
 941
 942         value &= 0xFF;
 943
 944         if (value == 1) /* Low Speed */
 945                 value = 85;
 946         else if (value == 2)
 947                 value = 170;
 948         else if (value == 3)
 949                 value = 255;
 950         else if (value != 0) {
 951                 pr_err("Unknown fan speed %#x", value);
 952                 value = -1;
 953         }
 954
 955         return sprintf(buf, "%d\n", value);
 956 }
 957
 958 static ssize_t asus_hwmon_temp1(struct device *dev,
 959                                 struct device_attribute *attr,
 960                                 char *buf)
 961 {
 962         struct asus_wmi *asus = dev_get_drvdata(dev);
 963         u32 value;
 964         int err;
 965
 966         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
 967
 968         if (err < 0)
 969                 return err;
 970
 971         value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
 972
 973         return sprintf(buf, "%d\n", value);
 974 }
 975
 976 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
 977 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL, 0);
 978
 979 static ssize_t
 980 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 981 {
 982         return sprintf(buf, "asus\n");
 983 }
 984 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 985
 986 static struct attribute *hwmon_attributes[] = {
 987         &sensor_dev_attr_pwm1.dev_attr.attr,
 988         &sensor_dev_attr_temp1_input.dev_attr.attr,
 989         &sensor_dev_attr_name.dev_attr.attr,
 990         NULL
 991 };
 992
 993 static mode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
 994                                           struct attribute *attr, int idx)
 995 {
 996         struct device *dev = container_of(kobj, struct device, kobj);
 997         struct platform_device *pdev = to_platform_device(dev->parent);
 998         struct asus_wmi *asus = platform_get_drvdata(pdev);
 999         bool ok = true;
1000         int dev_id = -1;
1001         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1002
1003         if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
1004                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1005         else if (attr == &sensor_dev_attr_temp1_input.dev_attr.attr)
1006                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1007
1008         if (dev_id != -1) {
1009                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1010
1011                 if (err < 0)
1012                         return 0; /* can't return negative here */
1013         }
1014
1015         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1016                 /*
1017                  * We need to find a better way, probably using sfun,
1018                  * bits or spec ...
1019                  * Currently we disable it if:
1020                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1021                  * - reverved bits are non-zero
1022                  * - sfun and presence bit are not set
1023                  */
1024                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1025                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1026                         ok = false;
1027         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1028                 /* If value is zero, something is clearly wrong */
1029                 if (value == 0)
1030                         ok = false;
1031         }
1032
1033         return ok ? attr->mode : 0;
1034 }
1035
1036 static struct attribute_group hwmon_attribute_group = {
1037         .is_visible = asus_hwmon_sysfs_is_visible,
1038         .attrs = hwmon_attributes
1039 };
1040
1041 static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
1042 {
1043         struct device *hwmon;
1044
1045         hwmon = asus->hwmon_device;
1046         if (!hwmon)
1047                 return;
1048         sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
1049         hwmon_device_unregister(hwmon);
1050         asus->hwmon_device = NULL;
1051 }
1052
1053 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1054 {
1055         struct device *hwmon;
1056         int result;
1057
1058         hwmon = hwmon_device_register(&asus->platform_device->dev);
1059         if (IS_ERR(hwmon)) {
1060                 pr_err("Could not register asus hwmon device\n");
1061                 return PTR_ERR(hwmon);
1062         }
1063         dev_set_drvdata(hwmon, asus);
1064         asus->hwmon_device = hwmon;
1065         result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
1066         if (result)
1067                 asus_wmi_hwmon_exit(asus);
1068         return result;
1069 }
1070
1071 /*
1072  * Backlight
1073  */
1074 static int read_backlight_power(struct asus_wmi *asus)
1075 {
1076         int ret = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_BACKLIGHT);
1077
1078         if (ret < 0)
1079                 return ret;
1080
1081         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1082 }
1083
1084 static int read_brightness_max(struct asus_wmi *asus)
1085 {
1086         u32 retval;
1087         int err;
1088
1089         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1090
1091         if (err < 0)
1092                 return err;
1093
1094         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1095         retval >>= 8;
1096
1097         if (!retval)
1098                 return -ENODEV;
1099
1100         return retval;
1101 }
1102
1103 static int read_brightness(struct backlight_device *bd)
1104 {
1105         struct asus_wmi *asus = bl_get_data(bd);
1106         u32 retval;
1107         int err;
1108
1109         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1110
1111         if (err < 0)
1112                 return err;
1113
1114         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1115 }
1116
1117 static int update_bl_status(struct backlight_device *bd)
1118 {
1119         struct asus_wmi *asus = bl_get_data(bd);
1120         u32 ctrl_param;
1121         int power, err;
1122
1123         ctrl_param = bd->props.brightness;
1124
1125         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1126                                     ctrl_param, NULL);
1127
1128         if (err < 0)
1129                 return err;
1130
1131         power = read_backlight_power(asus);
1132         if (power != -ENODEV && bd->props.power != power) {
1133                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1134                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1135                                             ctrl_param, NULL);
1136         }
1137         return err;
1138 }
1139
1140 static const struct backlight_ops asus_wmi_bl_ops = {
1141         .get_brightness = read_brightness,
1142         .update_status = update_bl_status,
1143 };
1144
1145 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1146 {
1147         struct backlight_device *bd = asus->backlight_device;
1148         int old = bd->props.brightness;
1149         int new = old;
1150
1151         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1152                 new = code - NOTIFY_BRNUP_MIN + 1;
1153         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1154                 new = code - NOTIFY_BRNDOWN_MIN;
1155
1156         bd->props.brightness = new;
1157         backlight_update_status(bd);
1158         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1159
1160         return old;
1161 }
1162
1163 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1164 {
1165         struct backlight_device *bd;
1166         struct backlight_properties props;
1167         int max;
1168         int power;
1169
1170         max = read_brightness_max(asus);
1171
1172         if (max == -ENODEV)
1173                 max = 0;
1174         else if (max < 0)
1175                 return max;
1176
1177         power = read_backlight_power(asus);
1178
1179         if (power == -ENODEV)
1180                 power = FB_BLANK_UNBLANK;
1181         else if (power < 0)
1182                 return power;
1183
1184         memset(&props, 0, sizeof(struct backlight_properties));
1185         props.type = BACKLIGHT_PLATFORM;
1186         props.max_brightness = max;
1187         bd = backlight_device_register(asus->driver->name,
1188                                        &asus->platform_device->dev, asus,
1189                                        &asus_wmi_bl_ops, &props);
1190         if (IS_ERR(bd)) {
1191                 pr_err("Could not register backlight device\n");
1192                 return PTR_ERR(bd);
1193         }
1194
1195         asus->backlight_device = bd;
1196
1197         bd->props.brightness = read_brightness(bd);
1198         bd->props.power = power;
1199         backlight_update_status(bd);
1200
1201         return 0;
1202 }
1203
1204 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1205 {
1206         if (asus->backlight_device)
1207                 backlight_device_unregister(asus->backlight_device);
1208
1209         asus->backlight_device = NULL;
1210 }
1211
1212 static void asus_wmi_notify(u32 value, void *context)
1213 {
1214         struct asus_wmi *asus = context;
1215         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1216         union acpi_object *obj;
1217         acpi_status status;
1218         int code;
1219         int orig_code;
1220         unsigned int key_value = 1;
1221         bool autorelease = 1;
1222
1223         status = wmi_get_event_data(value, &response);
1224         if (status != AE_OK) {
1225                 pr_err("bad event status 0x%x\n", status);
1226                 return;
1227         }
1228
1229         obj = (union acpi_object *)response.pointer;
1230
1231         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1232                 goto exit;
1233
1234         code = obj->integer.value;
1235         orig_code = code;
1236
1237         if (asus->driver->key_filter) {
1238                 asus->driver->key_filter(asus->driver, &code, &key_value,
1239                                          &autorelease);
1240                 if (code == ASUS_WMI_KEY_IGNORE)
1241                         goto exit;
1242         }
1243
1244         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1245                 code = NOTIFY_BRNUP_MIN;
1246         else if (code >= NOTIFY_BRNDOWN_MIN &&
1247                  code <= NOTIFY_BRNDOWN_MAX)
1248                 code = NOTIFY_BRNDOWN_MIN;
1249
1250         if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
1251                 if (!acpi_video_backlight_support())
1252                         asus_wmi_backlight_notify(asus, orig_code);
1253         } else if (!sparse_keymap_report_event(asus->inputdev, code,
1254                                                key_value, autorelease))
1255                 pr_info("Unknown key %x pressed\n", code);
1256
1257 exit:
1258         kfree(obj);
1259 }
1260
1261 /*
1262  * Sys helpers
1263  */
1264 static int parse_arg(const char *buf, unsigned long count, int *val)
1265 {
1266         if (!count)
1267                 return 0;
1268         if (sscanf(buf, "%i", val) != 1)
1269                 return -EINVAL;
1270         return count;
1271 }
1272
1273 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1274                              const char *buf, size_t count)
1275 {
1276         u32 retval;
1277         int rv, err, value;
1278
1279         value = asus_wmi_get_devstate_simple(asus, devid);
1280         if (value == -ENODEV)   /* Check device presence */
1281                 return value;
1282
1283         rv = parse_arg(buf, count, &value);
1284         err = asus_wmi_set_devstate(devid, value, &retval);
1285
1286         if (err < 0)
1287                 return err;
1288
1289         return rv;
1290 }
1291
1292 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1293 {
1294         int value = asus_wmi_get_devstate_simple(asus, devid);
1295
1296         if (value < 0)
1297                 return value;
1298
1299         return sprintf(buf, "%d\n", value);
1300 }
1301
1302 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1303         static ssize_t show_##_name(struct device *dev,                 \
1304                                     struct device_attribute *attr,      \
1305                                     char *buf)                          \
1306         {                                                               \
1307                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1308                                                                         \
1309                 return show_sys_wmi(asus, _cm, buf);                    \
1310         }                                                               \
1311         static ssize_t store_##_name(struct device *dev,                \
1312                                      struct device_attribute *attr,     \
1313                                      const char *buf, size_t count)     \
1314         {                                                               \
1315                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1316                                                                         \
1317                 return store_sys_wmi(asus, _cm, buf, count);            \
1318         }                                                               \
1319         static struct device_attribute dev_attr_##_name = {             \
1320                 .attr = {                                               \
1321                         .name = __stringify(_name),                     \
1322                         .mode = _mode },                                \
1323                 .show   = show_##_name,                                 \
1324                 .store  = store_##_name,                                \
1325         }
1326
1327 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1328 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1329 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1330
1331 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1332                            const char *buf, size_t count)
1333 {
1334         int value, rv;
1335
1336         if (!count || sscanf(buf, "%i", &value) != 1)
1337                 return -EINVAL;
1338         if (value < 0 || value > 2)
1339                 return -EINVAL;
1340
1341         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1342         if (rv < 0)
1343                 return rv;
1344
1345         return count;
1346 }
1347
1348 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1349
1350 static struct attribute *platform_attributes[] = {
1351         &dev_attr_cpufv.attr,
1352         &dev_attr_camera.attr,
1353         &dev_attr_cardr.attr,
1354         &dev_attr_touchpad.attr,
1355         NULL
1356 };
1357
1358 static mode_t asus_sysfs_is_visible(struct kobject *kobj,
1359                                     struct attribute *attr, int idx)
1360 {
1361         struct device *dev = container_of(kobj, struct device, kobj);
1362         struct platform_device *pdev = to_platform_device(dev);
1363         struct asus_wmi *asus = platform_get_drvdata(pdev);
1364         bool ok = true;
1365         int devid = -1;
1366
1367         if (attr == &dev_attr_camera.attr)
1368                 devid = ASUS_WMI_DEVID_CAMERA;
1369         else if (attr == &dev_attr_cardr.attr)
1370                 devid = ASUS_WMI_DEVID_CARDREADER;
1371         else if (attr == &dev_attr_touchpad.attr)
1372                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1373
1374         if (devid != -1)
1375                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1376
1377         return ok ? attr->mode : 0;
1378 }
1379
1380 static struct attribute_group platform_attribute_group = {
1381         .is_visible = asus_sysfs_is_visible,
1382         .attrs = platform_attributes
1383 };
1384
1385 static void asus_wmi_sysfs_exit(struct platform_device *device)
1386 {
1387         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1388 }
1389
1390 static int asus_wmi_sysfs_init(struct platform_device *device)
1391 {
1392         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1393 }
1394
1395 /*
1396  * Platform device
1397  */
1398 static int asus_wmi_platform_init(struct asus_wmi *asus)
1399 {
1400         int rv;
1401
1402         /* INIT enable hotkeys on some models */
1403         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1404                 pr_info("Initialization: %#x", rv);
1405
1406         /* We don't know yet what to do with this version... */
1407         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1408                 pr_info("BIOS WMI version: %d.%d", rv >> 16, rv & 0xFF);
1409                 asus->spec = rv;
1410         }
1411
1412         /*
1413          * The SFUN method probably allows the original driver to get the list
1414          * of features supported by a given model. For now, 0x0100 or 0x0800
1415          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1416          * The significance of others is yet to be found.
1417          */
1418         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1419                 pr_info("SFUN value: %#x", rv);
1420                 asus->sfun = rv;
1421         }
1422
1423         /*
1424          * Eee PC and Notebooks seems to have different method_id for DSTS,
1425          * but it may also be related to the BIOS's SPEC.
1426          * Note, on most Eeepc, there is no way to check if a method exist
1427          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1428          * but once again, SPEC may probably be used for that kind of things.
1429          */
1430         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1431                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1432         else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
1433                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1434
1435         if (!asus->dsts_id) {
1436                 pr_err("Can't find DSTS");
1437                 return -ENODEV;
1438         }
1439
1440         /* CWAP allow to define the behavior of the Fn+F2 key,
1441          * this method doesn't seems to be present on Eee PCs */
1442         if (asus->driver->wapf >= 0)
1443                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1444                                       asus->driver->wapf, NULL);
1445
1446         return asus_wmi_sysfs_init(asus->platform_device);
1447 }
1448
1449 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1450 {
1451         asus_wmi_sysfs_exit(asus->platform_device);
1452 }
1453
1454 /*
1455  * debugfs
1456  */
1457 struct asus_wmi_debugfs_node {
1458         struct asus_wmi *asus;
1459         char *name;
1460         int (*show) (struct seq_file *m, void *data);
1461 };
1462
1463 static int show_dsts(struct seq_file *m, void *data)
1464 {
1465         struct asus_wmi *asus = m->private;
1466         int err;
1467         u32 retval = -1;
1468
1469         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1470
1471         if (err < 0)
1472                 return err;
1473
1474         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1475
1476         return 0;
1477 }
1478
1479 static int show_devs(struct seq_file *m, void *data)
1480 {
1481         struct asus_wmi *asus = m->private;
1482         int err;
1483         u32 retval = -1;
1484
1485         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1486                                     &retval);
1487
1488         if (err < 0)
1489                 return err;
1490
1491         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1492                    asus->debug.ctrl_param, retval);
1493
1494         return 0;
1495 }
1496
1497 static int show_call(struct seq_file *m, void *data)
1498 {
1499         struct asus_wmi *asus = m->private;
1500         struct bios_args args = {
1501                 .arg0 = asus->debug.dev_id,
1502                 .arg1 = asus->debug.ctrl_param,
1503         };
1504         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1505         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1506         union acpi_object *obj;
1507         acpi_status status;
1508
1509         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1510                                      1, asus->debug.method_id,
1511                                      &input, &output);
1512
1513         if (ACPI_FAILURE(status))
1514                 return -EIO;
1515
1516         obj = (union acpi_object *)output.pointer;
1517         if (obj && obj->type == ACPI_TYPE_INTEGER)
1518                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1519                            asus->debug.dev_id, asus->debug.ctrl_param,
1520                            (u32) obj->integer.value);
1521         else
1522                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1523                            asus->debug.dev_id, asus->debug.ctrl_param,
1524                            obj ? obj->type : -1);
1525
1526         kfree(obj);
1527
1528         return 0;
1529 }
1530
1531 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1532         {NULL, "devs", show_devs},
1533         {NULL, "dsts", show_dsts},
1534         {NULL, "call", show_call},
1535 };
1536
1537 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1538 {
1539         struct asus_wmi_debugfs_node *node = inode->i_private;
1540
1541         return single_open(file, node->show, node->asus);
1542 }
1543
1544 static const struct file_operations asus_wmi_debugfs_io_ops = {
1545         .owner = THIS_MODULE,
1546         .open = asus_wmi_debugfs_open,
1547         .read = seq_read,
1548         .llseek = seq_lseek,
1549         .release = single_release,
1550 };
1551
1552 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1553 {
1554         debugfs_remove_recursive(asus->debug.root);
1555 }
1556
1557 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1558 {
1559         struct dentry *dent;
1560         int i;
1561
1562         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1563         if (!asus->debug.root) {
1564                 pr_err("failed to create debugfs directory");
1565                 goto error_debugfs;
1566         }
1567
1568         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1569                                   asus->debug.root, &asus->debug.method_id);
1570         if (!dent)
1571                 goto error_debugfs;
1572
1573         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1574                                   asus->debug.root, &asus->debug.dev_id);
1575         if (!dent)
1576                 goto error_debugfs;
1577
1578         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1579                                   asus->debug.root, &asus->debug.ctrl_param);
1580         if (!dent)
1581                 goto error_debugfs;
1582
1583         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1584                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1585
1586                 node->asus = asus;
1587                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1588                                            asus->debug.root, node,
1589                                            &asus_wmi_debugfs_io_ops);
1590                 if (!dent) {
1591                         pr_err("failed to create debug file: %s\n", node->name);
1592                         goto error_debugfs;
1593                 }
1594         }
1595
1596         return 0;
1597
1598 error_debugfs:
1599         asus_wmi_debugfs_exit(asus);
1600         return -ENOMEM;
1601 }
1602
1603 /*
1604  * WMI Driver
1605  */
1606 static int asus_wmi_add(struct platform_device *pdev)
1607 {
1608         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1609         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1610         struct asus_wmi *asus;
1611         acpi_status status;
1612         int err;
1613
1614         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1615         if (!asus)
1616                 return -ENOMEM;
1617
1618         asus->driver = wdrv;
1619         asus->platform_device = pdev;
1620         wdrv->platform_device = pdev;
1621         platform_set_drvdata(asus->platform_device, asus);
1622
1623         if (wdrv->quirks)
1624                 wdrv->quirks(asus->driver);
1625
1626         err = asus_wmi_platform_init(asus);
1627         if (err)
1628                 goto fail_platform;
1629
1630         err = asus_wmi_input_init(asus);
1631         if (err)
1632                 goto fail_input;
1633
1634         err = asus_wmi_hwmon_init(asus);
1635         if (err)
1636                 goto fail_hwmon;
1637
1638         err = asus_wmi_led_init(asus);
1639         if (err)
1640                 goto fail_leds;
1641
1642         err = asus_wmi_rfkill_init(asus);
1643         if (err)
1644                 goto fail_rfkill;
1645
1646         if (!acpi_video_backlight_support()) {
1647                 err = asus_wmi_backlight_init(asus);
1648                 if (err && err != -ENODEV)
1649                         goto fail_backlight;
1650         } else
1651                 pr_info("Backlight controlled by ACPI video driver\n");
1652
1653         status = wmi_install_notify_handler(asus->driver->event_guid,
1654                                             asus_wmi_notify, asus);
1655         if (ACPI_FAILURE(status)) {
1656                 pr_err("Unable to register notify handler - %d\n", status);
1657                 err = -ENODEV;
1658                 goto fail_wmi_handler;
1659         }
1660
1661         err = asus_wmi_debugfs_init(asus);
1662         if (err)
1663                 goto fail_debugfs;
1664
1665         return 0;
1666
1667 fail_debugfs:
1668         wmi_remove_notify_handler(asus->driver->event_guid);
1669 fail_wmi_handler:
1670         asus_wmi_backlight_exit(asus);
1671 fail_backlight:
1672         asus_wmi_rfkill_exit(asus);
1673 fail_rfkill:
1674         asus_wmi_led_exit(asus);
1675 fail_leds:
1676         asus_wmi_hwmon_exit(asus);
1677 fail_hwmon:
1678         asus_wmi_input_exit(asus);
1679 fail_input:
1680         asus_wmi_platform_exit(asus);
1681 fail_platform:
1682         kfree(asus);
1683         return err;
1684 }
1685
1686 static int asus_wmi_remove(struct platform_device *device)
1687 {
1688         struct asus_wmi *asus;
1689
1690         asus = platform_get_drvdata(device);
1691         wmi_remove_notify_handler(asus->driver->event_guid);
1692         asus_wmi_backlight_exit(asus);
1693         asus_wmi_input_exit(asus);
1694         asus_wmi_hwmon_exit(asus);
1695         asus_wmi_led_exit(asus);
1696         asus_wmi_rfkill_exit(asus);
1697         asus_wmi_debugfs_exit(asus);
1698         asus_wmi_platform_exit(asus);
1699
1700         kfree(asus);
1701         return 0;
1702 }
1703
1704 /*
1705  * Platform driver - hibernate/resume callbacks
1706  */
1707 static int asus_hotk_thaw(struct device *device)
1708 {
1709         struct asus_wmi *asus = dev_get_drvdata(device);
1710
1711         if (asus->wlan.rfkill) {
1712                 bool wlan;
1713
1714                 /*
1715                  * Work around bios bug - acpi _PTS turns off the wireless led
1716                  * during suspend.  Normally it restores it on resume, but
1717                  * we should kick it ourselves in case hibernation is aborted.
1718                  */
1719                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1720                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1721         }
1722
1723         return 0;
1724 }
1725
1726 static int asus_hotk_restore(struct device *device)
1727 {
1728         struct asus_wmi *asus = dev_get_drvdata(device);
1729         int bl;
1730
1731         /* Refresh both wlan rfkill state and pci hotplug */
1732         if (asus->wlan.rfkill)
1733                 asus_rfkill_hotplug(asus);
1734
1735         if (asus->bluetooth.rfkill) {
1736                 bl = !asus_wmi_get_devstate_simple(asus,
1737                                                    ASUS_WMI_DEVID_BLUETOOTH);
1738                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1739         }
1740         if (asus->wimax.rfkill) {
1741                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1742                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1743         }
1744         if (asus->wwan3g.rfkill) {
1745                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1746                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1747         }
1748         if (asus->gps.rfkill) {
1749                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1750                 rfkill_set_sw_state(asus->gps.rfkill, bl);
1751         }
1752         if (asus->uwb.rfkill) {
1753                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1754                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1755         }
1756
1757         return 0;
1758 }
1759
1760 static const struct dev_pm_ops asus_pm_ops = {
1761         .thaw = asus_hotk_thaw,
1762         .restore = asus_hotk_restore,
1763 };
1764
1765 static int asus_wmi_probe(struct platform_device *pdev)
1766 {
1767         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1768         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1769         int ret;
1770
1771         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1772                 pr_warn("Management GUID not found\n");
1773                 return -ENODEV;
1774         }
1775
1776         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1777                 pr_warn("Event GUID not found\n");
1778                 return -ENODEV;
1779         }
1780
1781         if (wdrv->probe) {
1782                 ret = wdrv->probe(pdev);
1783                 if (ret)
1784                         return ret;
1785         }
1786
1787         return asus_wmi_add(pdev);
1788 }
1789
1790 static bool used;
1791
1792 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1793 {
1794         struct platform_driver *platform_driver;
1795         struct platform_device *platform_device;
1796
1797         if (used)
1798                 return -EBUSY;
1799
1800         platform_driver = &driver->platform_driver;
1801         platform_driver->remove = asus_wmi_remove;
1802         platform_driver->driver.owner = driver->owner;
1803         platform_driver->driver.name = driver->name;
1804         platform_driver->driver.pm = &asus_pm_ops;
1805
1806         platform_device = platform_create_bundle(platform_driver,
1807                                                  asus_wmi_probe,
1808                                                  NULL, 0, NULL, 0);
1809         if (IS_ERR(platform_device))
1810                 return PTR_ERR(platform_device);
1811
1812         used = true;
1813         return 0;
1814 }
1815 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1816
1817 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1818 {
1819         platform_device_unregister(driver->platform_device);
1820         platform_driver_unregister(&driver->platform_driver);
1821         used = false;
1822 }
1823 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1824
1825 static int __init asus_wmi_init(void)
1826 {
1827         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1828                 pr_info("Asus Management GUID not found");
1829                 return -ENODEV;
1830         }
1831
1832         pr_info("ASUS WMI generic driver loaded");
1833         return 0;
1834 }
1835
1836 static void __exit asus_wmi_exit(void)
1837 {
1838         pr_info("ASUS WMI generic driver unloaded");
1839 }
1840
1841 module_init(asus_wmi_init);
1842 module_exit(asus_wmi_exit);