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 & 0x7F;
 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 &&
 788             asus->driver->quirks->hotplug_wireless)
 789                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 790                                        &asus_rfkill_wlan_ops, arfkill);
 791         else
 792                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
 793                                        &asus_rfkill_ops, arfkill);
 794
 795         if (!*rfkill)
 796                 return -EINVAL;
 797
 798         rfkill_init_sw_state(*rfkill, !result);
 799         result = rfkill_register(*rfkill);
 800         if (result) {
 801                 rfkill_destroy(*rfkill);
 802                 *rfkill = NULL;
 803                 return result;
 804         }
 805         return 0;
 806 }
 807
 808 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
 809 {
 810         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 811         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 812         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 813         if (asus->wlan.rfkill) {
 814                 rfkill_unregister(asus->wlan.rfkill);
 815                 rfkill_destroy(asus->wlan.rfkill);
 816                 asus->wlan.rfkill = NULL;
 817         }
 818         /*
 819          * Refresh pci hotplug in case the rfkill state was changed after
 820          * asus_unregister_rfkill_notifier()
 821          */
 822         asus_rfkill_hotplug(asus);
 823         if (asus->hotplug_slot)
 824                 pci_hp_deregister(asus->hotplug_slot);
 825         if (asus->hotplug_workqueue)
 826                 destroy_workqueue(asus->hotplug_workqueue);
 827
 828         if (asus->bluetooth.rfkill) {
 829                 rfkill_unregister(asus->bluetooth.rfkill);
 830                 rfkill_destroy(asus->bluetooth.rfkill);
 831                 asus->bluetooth.rfkill = NULL;
 832         }
 833         if (asus->wimax.rfkill) {
 834                 rfkill_unregister(asus->wimax.rfkill);
 835                 rfkill_destroy(asus->wimax.rfkill);
 836                 asus->wimax.rfkill = NULL;
 837         }
 838         if (asus->wwan3g.rfkill) {
 839                 rfkill_unregister(asus->wwan3g.rfkill);
 840                 rfkill_destroy(asus->wwan3g.rfkill);
 841                 asus->wwan3g.rfkill = NULL;
 842         }
 843         if (asus->gps.rfkill) {
 844                 rfkill_unregister(asus->gps.rfkill);
 845                 rfkill_destroy(asus->gps.rfkill);
 846                 asus->gps.rfkill = NULL;
 847         }
 848         if (asus->uwb.rfkill) {
 849                 rfkill_unregister(asus->uwb.rfkill);
 850                 rfkill_destroy(asus->uwb.rfkill);
 851                 asus->uwb.rfkill = NULL;
 852         }
 853 }
 854
 855 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
 856 {
 857         int result = 0;
 858
 859         mutex_init(&asus->hotplug_lock);
 860         mutex_init(&asus->wmi_lock);
 861
 862         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
 863                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
 864
 865         if (result && result != -ENODEV)
 866                 goto exit;
 867
 868         result = asus_new_rfkill(asus, &asus->bluetooth,
 869                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
 870                                  ASUS_WMI_DEVID_BLUETOOTH);
 871
 872         if (result && result != -ENODEV)
 873                 goto exit;
 874
 875         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
 876                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
 877
 878         if (result && result != -ENODEV)
 879                 goto exit;
 880
 881         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
 882                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
 883
 884         if (result && result != -ENODEV)
 885                 goto exit;
 886
 887         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
 888                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
 889
 890         if (result && result != -ENODEV)
 891                 goto exit;
 892
 893         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
 894                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
 895
 896         if (result && result != -ENODEV)
 897                 goto exit;
 898
 899         if (!asus->driver->quirks->hotplug_wireless)
 900                 goto exit;
 901
 902         result = asus_setup_pci_hotplug(asus);
 903         /*
 904          * If we get -EBUSY then something else is handling the PCI hotplug -
 905          * don't fail in this case
 906          */
 907         if (result == -EBUSY)
 908                 result = 0;
 909
 910         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
 911         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
 912         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
 913         /*
 914          * Refresh pci hotplug in case the rfkill state was changed during
 915          * setup.
 916          */
 917         asus_rfkill_hotplug(asus);
 918
 919 exit:
 920         if (result && result != -ENODEV)
 921                 asus_wmi_rfkill_exit(asus);
 922
 923         if (result == -ENODEV)
 924                 result = 0;
 925
 926         return result;
 927 }
 928
 929 /*
 930  * Hwmon device
 931  */
 932 static ssize_t asus_hwmon_pwm1(struct device *dev,
 933                                struct device_attribute *attr,
 934                                char *buf)
 935 {
 936         struct asus_wmi *asus = dev_get_drvdata(dev);
 937         u32 value;
 938         int err;
 939
 940         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
 941
 942         if (err < 0)
 943                 return err;
 944
 945         value &= 0xFF;
 946
 947         if (value == 1) /* Low Speed */
 948                 value = 85;
 949         else if (value == 2)
 950                 value = 170;
 951         else if (value == 3)
 952                 value = 255;
 953         else if (value != 0) {
 954                 pr_err("Unknown fan speed %#x", value);
 955                 value = -1;
 956         }
 957
 958         return sprintf(buf, "%d\n", value);
 959 }
 960
 961 static ssize_t asus_hwmon_temp1(struct device *dev,
 962                                 struct device_attribute *attr,
 963                                 char *buf)
 964 {
 965         struct asus_wmi *asus = dev_get_drvdata(dev);
 966         u32 value;
 967         int err;
 968
 969         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
 970
 971         if (err < 0)
 972                 return err;
 973
 974         value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
 975
 976         return sprintf(buf, "%d\n", value);
 977 }
 978
 979 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
 980 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL, 0);
 981
 982 static ssize_t
 983 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 984 {
 985         return sprintf(buf, "asus\n");
 986 }
 987 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 988
 989 static struct attribute *hwmon_attributes[] = {
 990         &sensor_dev_attr_pwm1.dev_attr.attr,
 991         &sensor_dev_attr_temp1_input.dev_attr.attr,
 992         &sensor_dev_attr_name.dev_attr.attr,
 993         NULL
 994 };
 995
 996 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
 997                                           struct attribute *attr, int idx)
 998 {
 999         struct device *dev = container_of(kobj, struct device, kobj);
1000         struct platform_device *pdev = to_platform_device(dev->parent);
1001         struct asus_wmi *asus = platform_get_drvdata(pdev);
1002         bool ok = true;
1003         int dev_id = -1;
1004         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1005
1006         if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
1007                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1008         else if (attr == &sensor_dev_attr_temp1_input.dev_attr.attr)
1009                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1010
1011         if (dev_id != -1) {
1012                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1013
1014                 if (err < 0)
1015                         return 0; /* can't return negative here */
1016         }
1017
1018         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1019                 /*
1020                  * We need to find a better way, probably using sfun,
1021                  * bits or spec ...
1022                  * Currently we disable it if:
1023                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1024                  * - reverved bits are non-zero
1025                  * - sfun and presence bit are not set
1026                  */
1027                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1028                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1029                         ok = false;
1030         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1031                 /* If value is zero, something is clearly wrong */
1032                 if (value == 0)
1033                         ok = false;
1034         }
1035
1036         return ok ? attr->mode : 0;
1037 }
1038
1039 static struct attribute_group hwmon_attribute_group = {
1040         .is_visible = asus_hwmon_sysfs_is_visible,
1041         .attrs = hwmon_attributes
1042 };
1043
1044 static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
1045 {
1046         struct device *hwmon;
1047
1048         hwmon = asus->hwmon_device;
1049         if (!hwmon)
1050                 return;
1051         sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
1052         hwmon_device_unregister(hwmon);
1053         asus->hwmon_device = NULL;
1054 }
1055
1056 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1057 {
1058         struct device *hwmon;
1059         int result;
1060
1061         hwmon = hwmon_device_register(&asus->platform_device->dev);
1062         if (IS_ERR(hwmon)) {
1063                 pr_err("Could not register asus hwmon device\n");
1064                 return PTR_ERR(hwmon);
1065         }
1066         dev_set_drvdata(hwmon, asus);
1067         asus->hwmon_device = hwmon;
1068         result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
1069         if (result)
1070                 asus_wmi_hwmon_exit(asus);
1071         return result;
1072 }
1073
1074 /*
1075  * Backlight
1076  */
1077 static int read_backlight_power(struct asus_wmi *asus)
1078 {
1079         int ret;
1080         if (asus->driver->quirks->store_backlight_power)
1081                 ret = !asus->driver->panel_power;
1082         else
1083                 ret = asus_wmi_get_devstate_simple(asus,
1084                                                    ASUS_WMI_DEVID_BACKLIGHT);
1085
1086         if (ret < 0)
1087                 return ret;
1088
1089         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1090 }
1091
1092 static int read_brightness_max(struct asus_wmi *asus)
1093 {
1094         u32 retval;
1095         int err;
1096
1097         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1098
1099         if (err < 0)
1100                 return err;
1101
1102         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1103         retval >>= 8;
1104
1105         if (!retval)
1106                 return -ENODEV;
1107
1108         return retval;
1109 }
1110
1111 static int read_brightness(struct backlight_device *bd)
1112 {
1113         struct asus_wmi *asus = bl_get_data(bd);
1114         u32 retval;
1115         int err;
1116
1117         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1118
1119         if (err < 0)
1120                 return err;
1121
1122         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1123 }
1124
1125 static u32 get_scalar_command(struct backlight_device *bd)
1126 {
1127         struct asus_wmi *asus = bl_get_data(bd);
1128         u32 ctrl_param = 0;
1129
1130         if ((asus->driver->brightness < bd->props.brightness) ||
1131             bd->props.brightness == bd->props.max_brightness)
1132                 ctrl_param = 0x00008001;
1133         else if ((asus->driver->brightness > bd->props.brightness) ||
1134                  bd->props.brightness == 0)
1135                 ctrl_param = 0x00008000;
1136
1137         asus->driver->brightness = bd->props.brightness;
1138
1139         return ctrl_param;
1140 }
1141
1142 static int update_bl_status(struct backlight_device *bd)
1143 {
1144         struct asus_wmi *asus = bl_get_data(bd);
1145         u32 ctrl_param;
1146         int power, err = 0;
1147
1148         power = read_backlight_power(asus);
1149         if (power != -ENODEV && bd->props.power != power) {
1150                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1151                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1152                                             ctrl_param, NULL);
1153                 if (asus->driver->quirks->store_backlight_power)
1154                         asus->driver->panel_power = bd->props.power;
1155         } else {
1156                 if (asus->driver->quirks->scalar_panel_brightness)
1157                         ctrl_param = get_scalar_command(bd);
1158                 else
1159                         ctrl_param = bd->props.brightness;
1160
1161                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1162                                             ctrl_param, NULL);
1163         }
1164         return err;
1165 }
1166
1167 static const struct backlight_ops asus_wmi_bl_ops = {
1168         .get_brightness = read_brightness,
1169         .update_status = update_bl_status,
1170 };
1171
1172 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1173 {
1174         struct backlight_device *bd = asus->backlight_device;
1175         int old = bd->props.brightness;
1176         int new = old;
1177
1178         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1179                 new = code - NOTIFY_BRNUP_MIN + 1;
1180         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1181                 new = code - NOTIFY_BRNDOWN_MIN;
1182
1183         bd->props.brightness = new;
1184         backlight_update_status(bd);
1185         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1186
1187         return old;
1188 }
1189
1190 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1191 {
1192         struct backlight_device *bd;
1193         struct backlight_properties props;
1194         int max;
1195         int power;
1196
1197         max = read_brightness_max(asus);
1198
1199         if (max == -ENODEV)
1200                 max = 0;
1201         else if (max < 0)
1202                 return max;
1203
1204         power = read_backlight_power(asus);
1205
1206         if (power == -ENODEV)
1207                 power = FB_BLANK_UNBLANK;
1208         else if (power < 0)
1209                 return power;
1210
1211         memset(&props, 0, sizeof(struct backlight_properties));
1212         props.type = BACKLIGHT_PLATFORM;
1213         props.max_brightness = max;
1214         bd = backlight_device_register(asus->driver->name,
1215                                        &asus->platform_device->dev, asus,
1216                                        &asus_wmi_bl_ops, &props);
1217         if (IS_ERR(bd)) {
1218                 pr_err("Could not register backlight device\n");
1219                 return PTR_ERR(bd);
1220         }
1221
1222         asus->backlight_device = bd;
1223
1224         if (asus->driver->quirks->store_backlight_power)
1225                 asus->driver->panel_power = power;
1226
1227         bd->props.brightness = read_brightness(bd);
1228         bd->props.power = power;
1229         backlight_update_status(bd);
1230
1231         asus->driver->brightness = bd->props.brightness;
1232
1233         return 0;
1234 }
1235
1236 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1237 {
1238         if (asus->backlight_device)
1239                 backlight_device_unregister(asus->backlight_device);
1240
1241         asus->backlight_device = NULL;
1242 }
1243
1244 static void asus_wmi_notify(u32 value, void *context)
1245 {
1246         struct asus_wmi *asus = context;
1247         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1248         union acpi_object *obj;
1249         acpi_status status;
1250         int code;
1251         int orig_code;
1252         unsigned int key_value = 1;
1253         bool autorelease = 1;
1254
1255         status = wmi_get_event_data(value, &response);
1256         if (status != AE_OK) {
1257                 pr_err("bad event status 0x%x\n", status);
1258                 return;
1259         }
1260
1261         obj = (union acpi_object *)response.pointer;
1262
1263         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1264                 goto exit;
1265
1266         code = obj->integer.value;
1267         orig_code = code;
1268
1269         if (asus->driver->key_filter) {
1270                 asus->driver->key_filter(asus->driver, &code, &key_value,
1271                                          &autorelease);
1272                 if (code == ASUS_WMI_KEY_IGNORE)
1273                         goto exit;
1274         }
1275
1276         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1277                 code = NOTIFY_BRNUP_MIN;
1278         else if (code >= NOTIFY_BRNDOWN_MIN &&
1279                  code <= NOTIFY_BRNDOWN_MAX)
1280                 code = NOTIFY_BRNDOWN_MIN;
1281
1282         if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
1283                 if (!acpi_video_backlight_support())
1284                         asus_wmi_backlight_notify(asus, orig_code);
1285         } else if (!sparse_keymap_report_event(asus->inputdev, code,
1286                                                key_value, autorelease))
1287                 pr_info("Unknown key %x pressed\n", code);
1288
1289 exit:
1290         kfree(obj);
1291 }
1292
1293 /*
1294  * Sys helpers
1295  */
1296 static int parse_arg(const char *buf, unsigned long count, int *val)
1297 {
1298         if (!count)
1299                 return 0;
1300         if (sscanf(buf, "%i", val) != 1)
1301                 return -EINVAL;
1302         return count;
1303 }
1304
1305 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1306                              const char *buf, size_t count)
1307 {
1308         u32 retval;
1309         int rv, err, value;
1310
1311         value = asus_wmi_get_devstate_simple(asus, devid);
1312         if (value == -ENODEV)   /* Check device presence */
1313                 return value;
1314
1315         rv = parse_arg(buf, count, &value);
1316         err = asus_wmi_set_devstate(devid, value, &retval);
1317
1318         if (err < 0)
1319                 return err;
1320
1321         return rv;
1322 }
1323
1324 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1325 {
1326         int value = asus_wmi_get_devstate_simple(asus, devid);
1327
1328         if (value < 0)
1329                 return value;
1330
1331         return sprintf(buf, "%d\n", value);
1332 }
1333
1334 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1335         static ssize_t show_##_name(struct device *dev,                 \
1336                                     struct device_attribute *attr,      \
1337                                     char *buf)                          \
1338         {                                                               \
1339                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1340                                                                         \
1341                 return show_sys_wmi(asus, _cm, buf);                    \
1342         }                                                               \
1343         static ssize_t store_##_name(struct device *dev,                \
1344                                      struct device_attribute *attr,     \
1345                                      const char *buf, size_t count)     \
1346         {                                                               \
1347                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1348                                                                         \
1349                 return store_sys_wmi(asus, _cm, buf, count);            \
1350         }                                                               \
1351         static struct device_attribute dev_attr_##_name = {             \
1352                 .attr = {                                               \
1353                         .name = __stringify(_name),                     \
1354                         .mode = _mode },                                \
1355                 .show   = show_##_name,                                 \
1356                 .store  = store_##_name,                                \
1357         }
1358
1359 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1360 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1361 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1362
1363 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1364                            const char *buf, size_t count)
1365 {
1366         int value, rv;
1367
1368         if (!count || sscanf(buf, "%i", &value) != 1)
1369                 return -EINVAL;
1370         if (value < 0 || value > 2)
1371                 return -EINVAL;
1372
1373         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1374         if (rv < 0)
1375                 return rv;
1376
1377         return count;
1378 }
1379
1380 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1381
1382 static struct attribute *platform_attributes[] = {
1383         &dev_attr_cpufv.attr,
1384         &dev_attr_camera.attr,
1385         &dev_attr_cardr.attr,
1386         &dev_attr_touchpad.attr,
1387         NULL
1388 };
1389
1390 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1391                                     struct attribute *attr, int idx)
1392 {
1393         struct device *dev = container_of(kobj, struct device, kobj);
1394         struct platform_device *pdev = to_platform_device(dev);
1395         struct asus_wmi *asus = platform_get_drvdata(pdev);
1396         bool ok = true;
1397         int devid = -1;
1398
1399         if (attr == &dev_attr_camera.attr)
1400                 devid = ASUS_WMI_DEVID_CAMERA;
1401         else if (attr == &dev_attr_cardr.attr)
1402                 devid = ASUS_WMI_DEVID_CARDREADER;
1403         else if (attr == &dev_attr_touchpad.attr)
1404                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1405
1406         if (devid != -1)
1407                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1408
1409         return ok ? attr->mode : 0;
1410 }
1411
1412 static struct attribute_group platform_attribute_group = {
1413         .is_visible = asus_sysfs_is_visible,
1414         .attrs = platform_attributes
1415 };
1416
1417 static void asus_wmi_sysfs_exit(struct platform_device *device)
1418 {
1419         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1420 }
1421
1422 static int asus_wmi_sysfs_init(struct platform_device *device)
1423 {
1424         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1425 }
1426
1427 /*
1428  * Platform device
1429  */
1430 static int asus_wmi_platform_init(struct asus_wmi *asus)
1431 {
1432         int rv;
1433
1434         /* INIT enable hotkeys on some models */
1435         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1436                 pr_info("Initialization: %#x", rv);
1437
1438         /* We don't know yet what to do with this version... */
1439         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1440                 pr_info("BIOS WMI version: %d.%d", rv >> 16, rv & 0xFF);
1441                 asus->spec = rv;
1442         }
1443
1444         /*
1445          * The SFUN method probably allows the original driver to get the list
1446          * of features supported by a given model. For now, 0x0100 or 0x0800
1447          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1448          * The significance of others is yet to be found.
1449          */
1450         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1451                 pr_info("SFUN value: %#x", rv);
1452                 asus->sfun = rv;
1453         }
1454
1455         /*
1456          * Eee PC and Notebooks seems to have different method_id for DSTS,
1457          * but it may also be related to the BIOS's SPEC.
1458          * Note, on most Eeepc, there is no way to check if a method exist
1459          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1460          * but once again, SPEC may probably be used for that kind of things.
1461          */
1462         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1463                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1464         else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
1465                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1466
1467         if (!asus->dsts_id) {
1468                 pr_err("Can't find DSTS");
1469                 return -ENODEV;
1470         }
1471
1472         /* CWAP allow to define the behavior of the Fn+F2 key,
1473          * this method doesn't seems to be present on Eee PCs */
1474         if (asus->driver->wapf >= 0)
1475                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1476                                       asus->driver->wapf, NULL);
1477
1478         return asus_wmi_sysfs_init(asus->platform_device);
1479 }
1480
1481 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1482 {
1483         asus_wmi_sysfs_exit(asus->platform_device);
1484 }
1485
1486 /*
1487  * debugfs
1488  */
1489 struct asus_wmi_debugfs_node {
1490         struct asus_wmi *asus;
1491         char *name;
1492         int (*show) (struct seq_file *m, void *data);
1493 };
1494
1495 static int show_dsts(struct seq_file *m, void *data)
1496 {
1497         struct asus_wmi *asus = m->private;
1498         int err;
1499         u32 retval = -1;
1500
1501         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1502
1503         if (err < 0)
1504                 return err;
1505
1506         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1507
1508         return 0;
1509 }
1510
1511 static int show_devs(struct seq_file *m, void *data)
1512 {
1513         struct asus_wmi *asus = m->private;
1514         int err;
1515         u32 retval = -1;
1516
1517         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1518                                     &retval);
1519
1520         if (err < 0)
1521                 return err;
1522
1523         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1524                    asus->debug.ctrl_param, retval);
1525
1526         return 0;
1527 }
1528
1529 static int show_call(struct seq_file *m, void *data)
1530 {
1531         struct asus_wmi *asus = m->private;
1532         struct bios_args args = {
1533                 .arg0 = asus->debug.dev_id,
1534                 .arg1 = asus->debug.ctrl_param,
1535         };
1536         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1537         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1538         union acpi_object *obj;
1539         acpi_status status;
1540
1541         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1542                                      1, asus->debug.method_id,
1543                                      &input, &output);
1544
1545         if (ACPI_FAILURE(status))
1546                 return -EIO;
1547
1548         obj = (union acpi_object *)output.pointer;
1549         if (obj && obj->type == ACPI_TYPE_INTEGER)
1550                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1551                            asus->debug.dev_id, asus->debug.ctrl_param,
1552                            (u32) obj->integer.value);
1553         else
1554                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1555                            asus->debug.dev_id, asus->debug.ctrl_param,
1556                            obj ? obj->type : -1);
1557
1558         kfree(obj);
1559
1560         return 0;
1561 }
1562
1563 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1564         {NULL, "devs", show_devs},
1565         {NULL, "dsts", show_dsts},
1566         {NULL, "call", show_call},
1567 };
1568
1569 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1570 {
1571         struct asus_wmi_debugfs_node *node = inode->i_private;
1572
1573         return single_open(file, node->show, node->asus);
1574 }
1575
1576 static const struct file_operations asus_wmi_debugfs_io_ops = {
1577         .owner = THIS_MODULE,
1578         .open = asus_wmi_debugfs_open,
1579         .read = seq_read,
1580         .llseek = seq_lseek,
1581         .release = single_release,
1582 };
1583
1584 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1585 {
1586         debugfs_remove_recursive(asus->debug.root);
1587 }
1588
1589 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1590 {
1591         struct dentry *dent;
1592         int i;
1593
1594         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1595         if (!asus->debug.root) {
1596                 pr_err("failed to create debugfs directory");
1597                 goto error_debugfs;
1598         }
1599
1600         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1601                                   asus->debug.root, &asus->debug.method_id);
1602         if (!dent)
1603                 goto error_debugfs;
1604
1605         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1606                                   asus->debug.root, &asus->debug.dev_id);
1607         if (!dent)
1608                 goto error_debugfs;
1609
1610         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1611                                   asus->debug.root, &asus->debug.ctrl_param);
1612         if (!dent)
1613                 goto error_debugfs;
1614
1615         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1616                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1617
1618                 node->asus = asus;
1619                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1620                                            asus->debug.root, node,
1621                                            &asus_wmi_debugfs_io_ops);
1622                 if (!dent) {
1623                         pr_err("failed to create debug file: %s\n", node->name);
1624                         goto error_debugfs;
1625                 }
1626         }
1627
1628         return 0;
1629
1630 error_debugfs:
1631         asus_wmi_debugfs_exit(asus);
1632         return -ENOMEM;
1633 }
1634
1635 /*
1636  * WMI Driver
1637  */
1638 static int asus_wmi_add(struct platform_device *pdev)
1639 {
1640         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1641         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1642         struct asus_wmi *asus;
1643         acpi_status status;
1644         int err;
1645
1646         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1647         if (!asus)
1648                 return -ENOMEM;
1649
1650         asus->driver = wdrv;
1651         asus->platform_device = pdev;
1652         wdrv->platform_device = pdev;
1653         platform_set_drvdata(asus->platform_device, asus);
1654
1655         if (wdrv->detect_quirks)
1656                 wdrv->detect_quirks(asus->driver);
1657
1658         err = asus_wmi_platform_init(asus);
1659         if (err)
1660                 goto fail_platform;
1661
1662         err = asus_wmi_input_init(asus);
1663         if (err)
1664                 goto fail_input;
1665
1666         err = asus_wmi_hwmon_init(asus);
1667         if (err)
1668                 goto fail_hwmon;
1669
1670         err = asus_wmi_led_init(asus);
1671         if (err)
1672                 goto fail_leds;
1673
1674         err = asus_wmi_rfkill_init(asus);
1675         if (err)
1676                 goto fail_rfkill;
1677
1678         if (!acpi_video_backlight_support()) {
1679                 err = asus_wmi_backlight_init(asus);
1680                 if (err && err != -ENODEV)
1681                         goto fail_backlight;
1682         } else
1683                 pr_info("Backlight controlled by ACPI video driver\n");
1684
1685         status = wmi_install_notify_handler(asus->driver->event_guid,
1686                                             asus_wmi_notify, asus);
1687         if (ACPI_FAILURE(status)) {
1688                 pr_err("Unable to register notify handler - %d\n", status);
1689                 err = -ENODEV;
1690                 goto fail_wmi_handler;
1691         }
1692
1693         err = asus_wmi_debugfs_init(asus);
1694         if (err)
1695                 goto fail_debugfs;
1696
1697         return 0;
1698
1699 fail_debugfs:
1700         wmi_remove_notify_handler(asus->driver->event_guid);
1701 fail_wmi_handler:
1702         asus_wmi_backlight_exit(asus);
1703 fail_backlight:
1704         asus_wmi_rfkill_exit(asus);
1705 fail_rfkill:
1706         asus_wmi_led_exit(asus);
1707 fail_leds:
1708         asus_wmi_hwmon_exit(asus);
1709 fail_hwmon:
1710         asus_wmi_input_exit(asus);
1711 fail_input:
1712         asus_wmi_platform_exit(asus);
1713 fail_platform:
1714         kfree(asus);
1715         return err;
1716 }
1717
1718 static int asus_wmi_remove(struct platform_device *device)
1719 {
1720         struct asus_wmi *asus;
1721
1722         asus = platform_get_drvdata(device);
1723         wmi_remove_notify_handler(asus->driver->event_guid);
1724         asus_wmi_backlight_exit(asus);
1725         asus_wmi_input_exit(asus);
1726         asus_wmi_hwmon_exit(asus);
1727         asus_wmi_led_exit(asus);
1728         asus_wmi_rfkill_exit(asus);
1729         asus_wmi_debugfs_exit(asus);
1730         asus_wmi_platform_exit(asus);
1731
1732         kfree(asus);
1733         return 0;
1734 }
1735
1736 /*
1737  * Platform driver - hibernate/resume callbacks
1738  */
1739 static int asus_hotk_thaw(struct device *device)
1740 {
1741         struct asus_wmi *asus = dev_get_drvdata(device);
1742
1743         if (asus->wlan.rfkill) {
1744                 bool wlan;
1745
1746                 /*
1747                  * Work around bios bug - acpi _PTS turns off the wireless led
1748                  * during suspend.  Normally it restores it on resume, but
1749                  * we should kick it ourselves in case hibernation is aborted.
1750                  */
1751                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1752                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1753         }
1754
1755         return 0;
1756 }
1757
1758 static int asus_hotk_restore(struct device *device)
1759 {
1760         struct asus_wmi *asus = dev_get_drvdata(device);
1761         int bl;
1762
1763         /* Refresh both wlan rfkill state and pci hotplug */
1764         if (asus->wlan.rfkill)
1765                 asus_rfkill_hotplug(asus);
1766
1767         if (asus->bluetooth.rfkill) {
1768                 bl = !asus_wmi_get_devstate_simple(asus,
1769                                                    ASUS_WMI_DEVID_BLUETOOTH);
1770                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1771         }
1772         if (asus->wimax.rfkill) {
1773                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1774                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1775         }
1776         if (asus->wwan3g.rfkill) {
1777                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1778                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1779         }
1780         if (asus->gps.rfkill) {
1781                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1782                 rfkill_set_sw_state(asus->gps.rfkill, bl);
1783         }
1784         if (asus->uwb.rfkill) {
1785                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1786                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1787         }
1788
1789         return 0;
1790 }
1791
1792 static const struct dev_pm_ops asus_pm_ops = {
1793         .thaw = asus_hotk_thaw,
1794         .restore = asus_hotk_restore,
1795 };
1796
1797 static int asus_wmi_probe(struct platform_device *pdev)
1798 {
1799         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1800         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1801         int ret;
1802
1803         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1804                 pr_warn("Management GUID not found\n");
1805                 return -ENODEV;
1806         }
1807
1808         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1809                 pr_warn("Event GUID not found\n");
1810                 return -ENODEV;
1811         }
1812
1813         if (wdrv->probe) {
1814                 ret = wdrv->probe(pdev);
1815                 if (ret)
1816                         return ret;
1817         }
1818
1819         return asus_wmi_add(pdev);
1820 }
1821
1822 static bool used;
1823
1824 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1825 {
1826         struct platform_driver *platform_driver;
1827         struct platform_device *platform_device;
1828
1829         if (used)
1830                 return -EBUSY;
1831
1832         platform_driver = &driver->platform_driver;
1833         platform_driver->remove = asus_wmi_remove;
1834         platform_driver->driver.owner = driver->owner;
1835         platform_driver->driver.name = driver->name;
1836         platform_driver->driver.pm = &asus_pm_ops;
1837
1838         platform_device = platform_create_bundle(platform_driver,
1839                                                  asus_wmi_probe,
1840                                                  NULL, 0, NULL, 0);
1841         if (IS_ERR(platform_device))
1842                 return PTR_ERR(platform_device);
1843
1844         used = true;
1845         return 0;
1846 }
1847 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1848
1849 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1850 {
1851         platform_device_unregister(driver->platform_device);
1852         platform_driver_unregister(&driver->platform_driver);
1853         used = false;
1854 }
1855 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1856
1857 static int __init asus_wmi_init(void)
1858 {
1859         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1860                 pr_info("Asus Management GUID not found");
1861                 return -ENODEV;
1862         }
1863
1864         pr_info("ASUS WMI generic driver loaded");
1865         return 0;
1866 }
1867
1868 static void __exit asus_wmi_exit(void)
1869 {
1870         pr_info("ASUS WMI generic driver unloaded");
1871 }
1872
1873 module_init(asus_wmi_init);
1874 module_exit(asus_wmi_exit);