c285a16675ee7d912280028bf5f94c552fad6371
[sfrench/cifs-2.6.git] / 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_data/x86/asus-wmi.h>
47 #include <linux/platform_device.h>
48 #include <linux/thermal.h>
49 #include <linux/acpi.h>
50 #include <linux/dmi.h>
51 #include <acpi/video.h>
52
53 #include "asus-wmi.h"
54
55 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
56               "Yong Wang <yong.y.wang@intel.com>");
57 MODULE_DESCRIPTION("Asus Generic WMI Driver");
58 MODULE_LICENSE("GPL");
59
60 #define to_asus_wmi_driver(pdrv)                                        \
61         (container_of((pdrv), struct asus_wmi_driver, platform_driver))
62
63 #define ASUS_WMI_MGMT_GUID      "97845ED0-4E6D-11DE-8A39-0800200C9A66"
64
65 #define NOTIFY_BRNUP_MIN                0x11
66 #define NOTIFY_BRNUP_MAX                0x1f
67 #define NOTIFY_BRNDOWN_MIN              0x20
68 #define NOTIFY_BRNDOWN_MAX              0x2e
69 #define NOTIFY_KBD_BRTUP                0xc4
70 #define NOTIFY_KBD_BRTDWN               0xc5
71 #define NOTIFY_KBD_BRTTOGGLE            0xc7
72
73 #define ASUS_FAN_DESC                   "cpu_fan"
74 #define ASUS_FAN_MFUN                   0x13
75 #define ASUS_FAN_SFUN_READ              0x06
76 #define ASUS_FAN_SFUN_WRITE             0x07
77 #define ASUS_FAN_CTRL_MANUAL            1
78 #define ASUS_FAN_CTRL_AUTO              2
79
80 #define USB_INTEL_XUSB2PR               0xD0
81 #define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI   0x9c31
82
83 static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
84
85 static bool ashs_present(void)
86 {
87         int i = 0;
88         while (ashs_ids[i]) {
89                 if (acpi_dev_found(ashs_ids[i++]))
90                         return true;
91         }
92         return false;
93 }
94
95 struct bios_args {
96         u32 arg0;
97         u32 arg1;
98 } __packed;
99
100 /*
101  * Struct that's used for all methods called via AGFN. Naming is
102  * identically to the AML code.
103  */
104 struct agfn_args {
105         u16 mfun; /* probably "Multi-function" to be called */
106         u16 sfun; /* probably "Sub-function" to be called */
107         u16 len;  /* size of the hole struct, including subfunction fields */
108         u8 stas;  /* not used by now */
109         u8 err;   /* zero on success */
110 } __packed;
111
112 /* struct used for calling fan read and write methods */
113 struct fan_args {
114         struct agfn_args agfn;  /* common fields */
115         u8 fan;                 /* fan number: 0: set auto mode 1: 1st fan */
116         u32 speed;              /* read: RPM/100 - write: 0-255 */
117 } __packed;
118
119 /*
120  * <platform>/    - debugfs root directory
121  *   dev_id      - current dev_id
122  *   ctrl_param  - current ctrl_param
123  *   method_id   - current method_id
124  *   devs        - call DEVS(dev_id, ctrl_param) and print result
125  *   dsts        - call DSTS(dev_id)  and print result
126  *   call        - call method_id(dev_id, ctrl_param) and print result
127  */
128 struct asus_wmi_debug {
129         struct dentry *root;
130         u32 method_id;
131         u32 dev_id;
132         u32 ctrl_param;
133 };
134
135 struct asus_rfkill {
136         struct asus_wmi *asus;
137         struct rfkill *rfkill;
138         u32 dev_id;
139 };
140
141 struct asus_wmi {
142         int dsts_id;
143         int spec;
144         int sfun;
145
146         struct input_dev *inputdev;
147         struct backlight_device *backlight_device;
148         struct platform_device *platform_device;
149
150         struct led_classdev wlan_led;
151         int wlan_led_wk;
152         struct led_classdev tpd_led;
153         int tpd_led_wk;
154         struct led_classdev kbd_led;
155         int kbd_led_wk;
156         struct led_classdev lightbar_led;
157         int lightbar_led_wk;
158         struct workqueue_struct *led_workqueue;
159         struct work_struct tpd_led_work;
160         struct work_struct wlan_led_work;
161         struct work_struct lightbar_led_work;
162
163         struct asus_rfkill wlan;
164         struct asus_rfkill bluetooth;
165         struct asus_rfkill wimax;
166         struct asus_rfkill wwan3g;
167         struct asus_rfkill gps;
168         struct asus_rfkill uwb;
169
170         bool asus_hwmon_fan_manual_mode;
171         int asus_hwmon_num_fans;
172         int asus_hwmon_pwm;
173
174         struct hotplug_slot hotplug_slot;
175         struct mutex hotplug_lock;
176         struct mutex wmi_lock;
177         struct workqueue_struct *hotplug_workqueue;
178         struct work_struct hotplug_work;
179
180         struct asus_wmi_debug debug;
181
182         struct asus_wmi_driver *driver;
183 };
184
185 static int asus_wmi_input_init(struct asus_wmi *asus)
186 {
187         int err;
188
189         asus->inputdev = input_allocate_device();
190         if (!asus->inputdev)
191                 return -ENOMEM;
192
193         asus->inputdev->name = asus->driver->input_name;
194         asus->inputdev->phys = asus->driver->input_phys;
195         asus->inputdev->id.bustype = BUS_HOST;
196         asus->inputdev->dev.parent = &asus->platform_device->dev;
197         set_bit(EV_REP, asus->inputdev->evbit);
198
199         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
200         if (err)
201                 goto err_free_dev;
202
203         err = input_register_device(asus->inputdev);
204         if (err)
205                 goto err_free_dev;
206
207         return 0;
208
209 err_free_dev:
210         input_free_device(asus->inputdev);
211         return err;
212 }
213
214 static void asus_wmi_input_exit(struct asus_wmi *asus)
215 {
216         if (asus->inputdev)
217                 input_unregister_device(asus->inputdev);
218
219         asus->inputdev = NULL;
220 }
221
222 int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval)
223 {
224         struct bios_args args = {
225                 .arg0 = arg0,
226                 .arg1 = arg1,
227         };
228         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
229         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
230         acpi_status status;
231         union acpi_object *obj;
232         u32 tmp = 0;
233
234         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 0, method_id,
235                                      &input, &output);
236
237         if (ACPI_FAILURE(status))
238                 goto exit;
239
240         obj = (union acpi_object *)output.pointer;
241         if (obj && obj->type == ACPI_TYPE_INTEGER)
242                 tmp = (u32) obj->integer.value;
243
244         if (retval)
245                 *retval = tmp;
246
247         kfree(obj);
248
249 exit:
250         if (ACPI_FAILURE(status))
251                 return -EIO;
252
253         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
254                 return -ENODEV;
255
256         return 0;
257 }
258 EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);
259
260 static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
261 {
262         struct acpi_buffer input;
263         u64 phys_addr;
264         u32 retval;
265         u32 status = -1;
266
267         /*
268          * Copy to dma capable address otherwise memory corruption occurs as
269          * bios has to be able to access it.
270          */
271         input.pointer = kzalloc(args.length, GFP_DMA | GFP_KERNEL);
272         input.length = args.length;
273         if (!input.pointer)
274                 return -ENOMEM;
275         phys_addr = virt_to_phys(input.pointer);
276         memcpy(input.pointer, args.pointer, args.length);
277
278         status = asus_wmi_evaluate_method(ASUS_WMI_METHODID_AGFN,
279                                         phys_addr, 0, &retval);
280         if (!status)
281                 memcpy(args.pointer, input.pointer, args.length);
282
283         kfree(input.pointer);
284         if (status)
285                 return -ENXIO;
286
287         return retval;
288 }
289
290 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
291 {
292         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
293 }
294
295 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
296                                  u32 *retval)
297 {
298         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
299                                         ctrl_param, retval);
300 }
301
302 /* Helper for special devices with magic return codes */
303 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
304                                       u32 dev_id, u32 mask)
305 {
306         u32 retval = 0;
307         int err;
308
309         err = asus_wmi_get_devstate(asus, dev_id, &retval);
310
311         if (err < 0)
312                 return err;
313
314         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
315                 return -ENODEV;
316
317         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
318                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
319                         return -ENODEV;
320         }
321
322         return retval & mask;
323 }
324
325 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
326 {
327         return asus_wmi_get_devstate_bits(asus, dev_id,
328                                           ASUS_WMI_DSTS_STATUS_BIT);
329 }
330
331 /*
332  * LEDs
333  */
334 /*
335  * These functions actually update the LED's, and are called from a
336  * workqueue. By doing this as separate work rather than when the LED
337  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
338  * potentially bad time, such as a timer interrupt.
339  */
340 static void tpd_led_update(struct work_struct *work)
341 {
342         int ctrl_param;
343         struct asus_wmi *asus;
344
345         asus = container_of(work, struct asus_wmi, tpd_led_work);
346
347         ctrl_param = asus->tpd_led_wk;
348         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
349 }
350
351 static void tpd_led_set(struct led_classdev *led_cdev,
352                         enum led_brightness value)
353 {
354         struct asus_wmi *asus;
355
356         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
357
358         asus->tpd_led_wk = !!value;
359         queue_work(asus->led_workqueue, &asus->tpd_led_work);
360 }
361
362 static int read_tpd_led_state(struct asus_wmi *asus)
363 {
364         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
365 }
366
367 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
368 {
369         struct asus_wmi *asus;
370
371         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
372
373         return read_tpd_led_state(asus);
374 }
375
376 static void kbd_led_update(struct asus_wmi *asus)
377 {
378         int ctrl_param = 0;
379
380         /*
381          * bits 0-2: level
382          * bit 7: light on/off
383          */
384         if (asus->kbd_led_wk > 0)
385                 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
386
387         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
388 }
389
390 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
391 {
392         int retval;
393
394         /*
395          * bits 0-2: level
396          * bit 7: light on/off
397          * bit 8-10: environment (0: dark, 1: normal, 2: light)
398          * bit 17: status unknown
399          */
400         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
401                                             0xFFFF);
402
403         /* Unknown status is considered as off */
404         if (retval == 0x8000)
405                 retval = 0;
406
407         if (retval >= 0) {
408                 if (level)
409                         *level = retval & 0x7F;
410                 if (env)
411                         *env = (retval >> 8) & 0x7F;
412                 retval = 0;
413         }
414
415         return retval;
416 }
417
418 static void do_kbd_led_set(struct led_classdev *led_cdev, int value)
419 {
420         struct asus_wmi *asus;
421         int max_level;
422
423         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
424         max_level = asus->kbd_led.max_brightness;
425
426         if (value > max_level)
427                 value = max_level;
428         else if (value < 0)
429                 value = 0;
430
431         asus->kbd_led_wk = value;
432         kbd_led_update(asus);
433 }
434
435 static void kbd_led_set(struct led_classdev *led_cdev,
436                         enum led_brightness value)
437 {
438         do_kbd_led_set(led_cdev, value);
439 }
440
441 static void kbd_led_set_by_kbd(struct asus_wmi *asus, enum led_brightness value)
442 {
443         struct led_classdev *led_cdev = &asus->kbd_led;
444
445         do_kbd_led_set(led_cdev, value);
446         led_classdev_notify_brightness_hw_changed(led_cdev, asus->kbd_led_wk);
447 }
448
449 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
450 {
451         struct asus_wmi *asus;
452         int retval, value;
453
454         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
455
456         retval = kbd_led_read(asus, &value, NULL);
457
458         if (retval < 0)
459                 return retval;
460
461         return value;
462 }
463
464 static int wlan_led_unknown_state(struct asus_wmi *asus)
465 {
466         u32 result;
467
468         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
469
470         return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
471 }
472
473 static int wlan_led_presence(struct asus_wmi *asus)
474 {
475         u32 result;
476
477         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
478
479         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
480 }
481
482 static void wlan_led_update(struct work_struct *work)
483 {
484         int ctrl_param;
485         struct asus_wmi *asus;
486
487         asus = container_of(work, struct asus_wmi, wlan_led_work);
488
489         ctrl_param = asus->wlan_led_wk;
490         asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
491 }
492
493 static void wlan_led_set(struct led_classdev *led_cdev,
494                          enum led_brightness value)
495 {
496         struct asus_wmi *asus;
497
498         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
499
500         asus->wlan_led_wk = !!value;
501         queue_work(asus->led_workqueue, &asus->wlan_led_work);
502 }
503
504 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
505 {
506         struct asus_wmi *asus;
507         u32 result;
508
509         asus = container_of(led_cdev, struct asus_wmi, wlan_led);
510         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
511
512         return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
513 }
514
515 static void lightbar_led_update(struct work_struct *work)
516 {
517         struct asus_wmi *asus;
518         int ctrl_param;
519
520         asus = container_of(work, struct asus_wmi, lightbar_led_work);
521
522         ctrl_param = asus->lightbar_led_wk;
523         asus_wmi_set_devstate(ASUS_WMI_DEVID_LIGHTBAR, ctrl_param, NULL);
524 }
525
526 static void lightbar_led_set(struct led_classdev *led_cdev,
527                              enum led_brightness value)
528 {
529         struct asus_wmi *asus;
530
531         asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
532
533         asus->lightbar_led_wk = !!value;
534         queue_work(asus->led_workqueue, &asus->lightbar_led_work);
535 }
536
537 static enum led_brightness lightbar_led_get(struct led_classdev *led_cdev)
538 {
539         struct asus_wmi *asus;
540         u32 result;
541
542         asus = container_of(led_cdev, struct asus_wmi, lightbar_led);
543         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
544
545         return result & ASUS_WMI_DSTS_LIGHTBAR_MASK;
546 }
547
548 static int lightbar_led_presence(struct asus_wmi *asus)
549 {
550         u32 result;
551
552         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_LIGHTBAR, &result);
553
554         return result & ASUS_WMI_DSTS_PRESENCE_BIT;
555 }
556
557 static void asus_wmi_led_exit(struct asus_wmi *asus)
558 {
559         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
560                 led_classdev_unregister(&asus->kbd_led);
561         if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
562                 led_classdev_unregister(&asus->tpd_led);
563         if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
564                 led_classdev_unregister(&asus->wlan_led);
565         if (!IS_ERR_OR_NULL(asus->lightbar_led.dev))
566                 led_classdev_unregister(&asus->lightbar_led);
567         if (asus->led_workqueue)
568                 destroy_workqueue(asus->led_workqueue);
569 }
570
571 static int asus_wmi_led_init(struct asus_wmi *asus)
572 {
573         int rv = 0, led_val;
574
575         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
576         if (!asus->led_workqueue)
577                 return -ENOMEM;
578
579         if (read_tpd_led_state(asus) >= 0) {
580                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
581
582                 asus->tpd_led.name = "asus::touchpad";
583                 asus->tpd_led.brightness_set = tpd_led_set;
584                 asus->tpd_led.brightness_get = tpd_led_get;
585                 asus->tpd_led.max_brightness = 1;
586
587                 rv = led_classdev_register(&asus->platform_device->dev,
588                                            &asus->tpd_led);
589                 if (rv)
590                         goto error;
591         }
592
593         led_val = kbd_led_read(asus, NULL, NULL);
594         if (led_val >= 0) {
595                 asus->kbd_led_wk = led_val;
596                 asus->kbd_led.name = "asus::kbd_backlight";
597                 asus->kbd_led.flags = LED_BRIGHT_HW_CHANGED;
598                 asus->kbd_led.brightness_set = kbd_led_set;
599                 asus->kbd_led.brightness_get = kbd_led_get;
600                 asus->kbd_led.max_brightness = 3;
601
602                 rv = led_classdev_register(&asus->platform_device->dev,
603                                            &asus->kbd_led);
604                 if (rv)
605                         goto error;
606         }
607
608         if (wlan_led_presence(asus) && (asus->driver->quirks->wapf > 0)) {
609                 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
610
611                 asus->wlan_led.name = "asus::wlan";
612                 asus->wlan_led.brightness_set = wlan_led_set;
613                 if (!wlan_led_unknown_state(asus))
614                         asus->wlan_led.brightness_get = wlan_led_get;
615                 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
616                 asus->wlan_led.max_brightness = 1;
617                 asus->wlan_led.default_trigger = "asus-wlan";
618
619                 rv = led_classdev_register(&asus->platform_device->dev,
620                                            &asus->wlan_led);
621                 if (rv)
622                         goto error;
623         }
624
625         if (lightbar_led_presence(asus)) {
626                 INIT_WORK(&asus->lightbar_led_work, lightbar_led_update);
627
628                 asus->lightbar_led.name = "asus::lightbar";
629                 asus->lightbar_led.brightness_set = lightbar_led_set;
630                 asus->lightbar_led.brightness_get = lightbar_led_get;
631                 asus->lightbar_led.max_brightness = 1;
632
633                 rv = led_classdev_register(&asus->platform_device->dev,
634                                            &asus->lightbar_led);
635         }
636
637 error:
638         if (rv)
639                 asus_wmi_led_exit(asus);
640
641         return rv;
642 }
643
644
645 /*
646  * PCI hotplug (for wlan rfkill)
647  */
648 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
649 {
650         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
651
652         if (result < 0)
653                 return false;
654         return !result;
655 }
656
657 static void asus_rfkill_hotplug(struct asus_wmi *asus)
658 {
659         struct pci_dev *dev;
660         struct pci_bus *bus;
661         bool blocked;
662         bool absent;
663         u32 l;
664
665         mutex_lock(&asus->wmi_lock);
666         blocked = asus_wlan_rfkill_blocked(asus);
667         mutex_unlock(&asus->wmi_lock);
668
669         mutex_lock(&asus->hotplug_lock);
670         pci_lock_rescan_remove();
671
672         if (asus->wlan.rfkill)
673                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
674
675         if (asus->hotplug_slot.ops) {
676                 bus = pci_find_bus(0, 1);
677                 if (!bus) {
678                         pr_warn("Unable to find PCI bus 1?\n");
679                         goto out_unlock;
680                 }
681
682                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
683                         pr_err("Unable to read PCI config space?\n");
684                         goto out_unlock;
685                 }
686                 absent = (l == 0xffffffff);
687
688                 if (blocked != absent) {
689                         pr_warn("BIOS says wireless lan is %s, "
690                                 "but the pci device is %s\n",
691                                 blocked ? "blocked" : "unblocked",
692                                 absent ? "absent" : "present");
693                         pr_warn("skipped wireless hotplug as probably "
694                                 "inappropriate for this model\n");
695                         goto out_unlock;
696                 }
697
698                 if (!blocked) {
699                         dev = pci_get_slot(bus, 0);
700                         if (dev) {
701                                 /* Device already present */
702                                 pci_dev_put(dev);
703                                 goto out_unlock;
704                         }
705                         dev = pci_scan_single_device(bus, 0);
706                         if (dev) {
707                                 pci_bus_assign_resources(bus);
708                                 pci_bus_add_device(dev);
709                         }
710                 } else {
711                         dev = pci_get_slot(bus, 0);
712                         if (dev) {
713                                 pci_stop_and_remove_bus_device(dev);
714                                 pci_dev_put(dev);
715                         }
716                 }
717         }
718
719 out_unlock:
720         pci_unlock_rescan_remove();
721         mutex_unlock(&asus->hotplug_lock);
722 }
723
724 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
725 {
726         struct asus_wmi *asus = data;
727
728         if (event != ACPI_NOTIFY_BUS_CHECK)
729                 return;
730
731         /*
732          * We can't call directly asus_rfkill_hotplug because most
733          * of the time WMBC is still being executed and not reetrant.
734          * There is currently no way to tell ACPICA that  we want this
735          * method to be serialized, we schedule a asus_rfkill_hotplug
736          * call later, in a safer context.
737          */
738         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
739 }
740
741 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
742 {
743         acpi_status status;
744         acpi_handle handle;
745
746         status = acpi_get_handle(NULL, node, &handle);
747
748         if (ACPI_SUCCESS(status)) {
749                 status = acpi_install_notify_handler(handle,
750                                                      ACPI_SYSTEM_NOTIFY,
751                                                      asus_rfkill_notify, asus);
752                 if (ACPI_FAILURE(status))
753                         pr_warn("Failed to register notify on %s\n", node);
754         } else
755                 return -ENODEV;
756
757         return 0;
758 }
759
760 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
761 {
762         acpi_status status = AE_OK;
763         acpi_handle handle;
764
765         status = acpi_get_handle(NULL, node, &handle);
766
767         if (ACPI_SUCCESS(status)) {
768                 status = acpi_remove_notify_handler(handle,
769                                                     ACPI_SYSTEM_NOTIFY,
770                                                     asus_rfkill_notify);
771                 if (ACPI_FAILURE(status))
772                         pr_err("Error removing rfkill notify handler %s\n",
773                                node);
774         }
775 }
776
777 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
778                                    u8 *value)
779 {
780         struct asus_wmi *asus = container_of(hotplug_slot,
781                                              struct asus_wmi, hotplug_slot);
782         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
783
784         if (result < 0)
785                 return result;
786
787         *value = !!result;
788         return 0;
789 }
790
791 static const struct hotplug_slot_ops asus_hotplug_slot_ops = {
792         .get_adapter_status = asus_get_adapter_status,
793         .get_power_status = asus_get_adapter_status,
794 };
795
796 static void asus_hotplug_work(struct work_struct *work)
797 {
798         struct asus_wmi *asus;
799
800         asus = container_of(work, struct asus_wmi, hotplug_work);
801         asus_rfkill_hotplug(asus);
802 }
803
804 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
805 {
806         int ret = -ENOMEM;
807         struct pci_bus *bus = pci_find_bus(0, 1);
808
809         if (!bus) {
810                 pr_err("Unable to find wifi PCI bus\n");
811                 return -ENODEV;
812         }
813
814         asus->hotplug_workqueue =
815             create_singlethread_workqueue("hotplug_workqueue");
816         if (!asus->hotplug_workqueue)
817                 goto error_workqueue;
818
819         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
820
821         asus->hotplug_slot.ops = &asus_hotplug_slot_ops;
822
823         ret = pci_hp_register(&asus->hotplug_slot, bus, 0, "asus-wifi");
824         if (ret) {
825                 pr_err("Unable to register hotplug slot - %d\n", ret);
826                 goto error_register;
827         }
828
829         return 0;
830
831 error_register:
832         asus->hotplug_slot.ops = NULL;
833         destroy_workqueue(asus->hotplug_workqueue);
834 error_workqueue:
835         return ret;
836 }
837
838 /*
839  * Rfkill devices
840  */
841 static int asus_rfkill_set(void *data, bool blocked)
842 {
843         struct asus_rfkill *priv = data;
844         u32 ctrl_param = !blocked;
845         u32 dev_id = priv->dev_id;
846
847         /*
848          * If the user bit is set, BIOS can't set and record the wlan status,
849          * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
850          * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
851          * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
852          * while setting the wlan status through WMI.
853          * This is also the behavior that windows app will do.
854          */
855         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
856              priv->asus->driver->wlan_ctrl_by_user)
857                 dev_id = ASUS_WMI_DEVID_WLAN_LED;
858
859         return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
860 }
861
862 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
863 {
864         struct asus_rfkill *priv = data;
865         int result;
866
867         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
868
869         if (result < 0)
870                 return;
871
872         rfkill_set_sw_state(priv->rfkill, !result);
873 }
874
875 static int asus_rfkill_wlan_set(void *data, bool blocked)
876 {
877         struct asus_rfkill *priv = data;
878         struct asus_wmi *asus = priv->asus;
879         int ret;
880
881         /*
882          * This handler is enabled only if hotplug is enabled.
883          * In this case, the asus_wmi_set_devstate() will
884          * trigger a wmi notification and we need to wait
885          * this call to finish before being able to call
886          * any wmi method
887          */
888         mutex_lock(&asus->wmi_lock);
889         ret = asus_rfkill_set(data, blocked);
890         mutex_unlock(&asus->wmi_lock);
891         return ret;
892 }
893
894 static const struct rfkill_ops asus_rfkill_wlan_ops = {
895         .set_block = asus_rfkill_wlan_set,
896         .query = asus_rfkill_query,
897 };
898
899 static const struct rfkill_ops asus_rfkill_ops = {
900         .set_block = asus_rfkill_set,
901         .query = asus_rfkill_query,
902 };
903
904 static int asus_new_rfkill(struct asus_wmi *asus,
905                            struct asus_rfkill *arfkill,
906                            const char *name, enum rfkill_type type, int dev_id)
907 {
908         int result = asus_wmi_get_devstate_simple(asus, dev_id);
909         struct rfkill **rfkill = &arfkill->rfkill;
910
911         if (result < 0)
912                 return result;
913
914         arfkill->dev_id = dev_id;
915         arfkill->asus = asus;
916
917         if (dev_id == ASUS_WMI_DEVID_WLAN &&
918             asus->driver->quirks->hotplug_wireless)
919                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
920                                        &asus_rfkill_wlan_ops, arfkill);
921         else
922                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
923                                        &asus_rfkill_ops, arfkill);
924
925         if (!*rfkill)
926                 return -EINVAL;
927
928         if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
929                         (asus->driver->quirks->wapf > 0))
930                 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
931
932         rfkill_init_sw_state(*rfkill, !result);
933         result = rfkill_register(*rfkill);
934         if (result) {
935                 rfkill_destroy(*rfkill);
936                 *rfkill = NULL;
937                 return result;
938         }
939         return 0;
940 }
941
942 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
943 {
944         if (asus->driver->wlan_ctrl_by_user && ashs_present())
945                 return;
946
947         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
948         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
949         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
950         if (asus->wlan.rfkill) {
951                 rfkill_unregister(asus->wlan.rfkill);
952                 rfkill_destroy(asus->wlan.rfkill);
953                 asus->wlan.rfkill = NULL;
954         }
955         /*
956          * Refresh pci hotplug in case the rfkill state was changed after
957          * asus_unregister_rfkill_notifier()
958          */
959         asus_rfkill_hotplug(asus);
960         if (asus->hotplug_slot.ops)
961                 pci_hp_deregister(&asus->hotplug_slot);
962         if (asus->hotplug_workqueue)
963                 destroy_workqueue(asus->hotplug_workqueue);
964
965         if (asus->bluetooth.rfkill) {
966                 rfkill_unregister(asus->bluetooth.rfkill);
967                 rfkill_destroy(asus->bluetooth.rfkill);
968                 asus->bluetooth.rfkill = NULL;
969         }
970         if (asus->wimax.rfkill) {
971                 rfkill_unregister(asus->wimax.rfkill);
972                 rfkill_destroy(asus->wimax.rfkill);
973                 asus->wimax.rfkill = NULL;
974         }
975         if (asus->wwan3g.rfkill) {
976                 rfkill_unregister(asus->wwan3g.rfkill);
977                 rfkill_destroy(asus->wwan3g.rfkill);
978                 asus->wwan3g.rfkill = NULL;
979         }
980         if (asus->gps.rfkill) {
981                 rfkill_unregister(asus->gps.rfkill);
982                 rfkill_destroy(asus->gps.rfkill);
983                 asus->gps.rfkill = NULL;
984         }
985         if (asus->uwb.rfkill) {
986                 rfkill_unregister(asus->uwb.rfkill);
987                 rfkill_destroy(asus->uwb.rfkill);
988                 asus->uwb.rfkill = NULL;
989         }
990 }
991
992 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
993 {
994         int result = 0;
995
996         mutex_init(&asus->hotplug_lock);
997         mutex_init(&asus->wmi_lock);
998
999         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
1000                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
1001
1002         if (result && result != -ENODEV)
1003                 goto exit;
1004
1005         result = asus_new_rfkill(asus, &asus->bluetooth,
1006                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
1007                                  ASUS_WMI_DEVID_BLUETOOTH);
1008
1009         if (result && result != -ENODEV)
1010                 goto exit;
1011
1012         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
1013                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
1014
1015         if (result && result != -ENODEV)
1016                 goto exit;
1017
1018         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
1019                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
1020
1021         if (result && result != -ENODEV)
1022                 goto exit;
1023
1024         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
1025                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
1026
1027         if (result && result != -ENODEV)
1028                 goto exit;
1029
1030         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
1031                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
1032
1033         if (result && result != -ENODEV)
1034                 goto exit;
1035
1036         if (!asus->driver->quirks->hotplug_wireless)
1037                 goto exit;
1038
1039         result = asus_setup_pci_hotplug(asus);
1040         /*
1041          * If we get -EBUSY then something else is handling the PCI hotplug -
1042          * don't fail in this case
1043          */
1044         if (result == -EBUSY)
1045                 result = 0;
1046
1047         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1048         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1049         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1050         /*
1051          * Refresh pci hotplug in case the rfkill state was changed during
1052          * setup.
1053          */
1054         asus_rfkill_hotplug(asus);
1055
1056 exit:
1057         if (result && result != -ENODEV)
1058                 asus_wmi_rfkill_exit(asus);
1059
1060         if (result == -ENODEV)
1061                 result = 0;
1062
1063         return result;
1064 }
1065
1066 static void asus_wmi_set_xusb2pr(struct asus_wmi *asus)
1067 {
1068         struct pci_dev *xhci_pdev;
1069         u32 orig_ports_available;
1070         u32 ports_available = asus->driver->quirks->xusb2pr;
1071
1072         xhci_pdev = pci_get_device(PCI_VENDOR_ID_INTEL,
1073                         PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI,
1074                         NULL);
1075
1076         if (!xhci_pdev)
1077                 return;
1078
1079         pci_read_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1080                                 &orig_ports_available);
1081
1082         pci_write_config_dword(xhci_pdev, USB_INTEL_XUSB2PR,
1083                                 cpu_to_le32(ports_available));
1084
1085         pr_info("set USB_INTEL_XUSB2PR old: 0x%04x, new: 0x%04x\n",
1086                         orig_ports_available, ports_available);
1087 }
1088
1089 /*
1090  * Some devices dont support or have borcken get_als method
1091  * but still support set method.
1092  */
1093 static void asus_wmi_set_als(void)
1094 {
1095         asus_wmi_set_devstate(ASUS_WMI_DEVID_ALS_ENABLE, 1, NULL);
1096 }
1097
1098 /*
1099  * Hwmon device
1100  */
1101 static int asus_hwmon_agfn_fan_speed_read(struct asus_wmi *asus, int fan,
1102                                           int *speed)
1103 {
1104         struct fan_args args = {
1105                 .agfn.len = sizeof(args),
1106                 .agfn.mfun = ASUS_FAN_MFUN,
1107                 .agfn.sfun = ASUS_FAN_SFUN_READ,
1108                 .fan = fan,
1109                 .speed = 0,
1110         };
1111         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1112         int status;
1113
1114         if (fan != 1)
1115                 return -EINVAL;
1116
1117         status = asus_wmi_evaluate_method_agfn(input);
1118
1119         if (status || args.agfn.err)
1120                 return -ENXIO;
1121
1122         if (speed)
1123                 *speed = args.speed;
1124
1125         return 0;
1126 }
1127
1128 static int asus_hwmon_agfn_fan_speed_write(struct asus_wmi *asus, int fan,
1129                                      int *speed)
1130 {
1131         struct fan_args args = {
1132                 .agfn.len = sizeof(args),
1133                 .agfn.mfun = ASUS_FAN_MFUN,
1134                 .agfn.sfun = ASUS_FAN_SFUN_WRITE,
1135                 .fan = fan,
1136                 .speed = speed ?  *speed : 0,
1137         };
1138         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1139         int status;
1140
1141         /* 1: for setting 1st fan's speed 0: setting auto mode */
1142         if (fan != 1 && fan != 0)
1143                 return -EINVAL;
1144
1145         status = asus_wmi_evaluate_method_agfn(input);
1146
1147         if (status || args.agfn.err)
1148                 return -ENXIO;
1149
1150         if (speed && fan == 1)
1151                 asus->asus_hwmon_pwm = *speed;
1152
1153         return 0;
1154 }
1155
1156 /*
1157  * Check if we can read the speed of one fan. If true we assume we can also
1158  * control it.
1159  */
1160 static int asus_hwmon_get_fan_number(struct asus_wmi *asus, int *num_fans)
1161 {
1162         int status;
1163         int speed = 0;
1164
1165         *num_fans = 0;
1166
1167         status = asus_hwmon_agfn_fan_speed_read(asus, 1, &speed);
1168         if (!status)
1169                 *num_fans = 1;
1170
1171         return 0;
1172 }
1173
1174 static int asus_hwmon_fan_set_auto(struct asus_wmi *asus)
1175 {
1176         int status;
1177
1178         status = asus_hwmon_agfn_fan_speed_write(asus, 0, NULL);
1179         if (status)
1180                 return -ENXIO;
1181
1182         asus->asus_hwmon_fan_manual_mode = false;
1183
1184         return 0;
1185 }
1186
1187 static int asus_hwmon_fan_rpm_show(struct device *dev, int fan)
1188 {
1189         struct asus_wmi *asus = dev_get_drvdata(dev);
1190         int value;
1191         int ret;
1192
1193         /* no speed readable on manual mode */
1194         if (asus->asus_hwmon_fan_manual_mode)
1195                 return -ENXIO;
1196
1197         ret = asus_hwmon_agfn_fan_speed_read(asus, fan+1, &value);
1198         if (ret) {
1199                 pr_warn("reading fan speed failed: %d\n", ret);
1200                 return -ENXIO;
1201         }
1202
1203         return value;
1204 }
1205
1206 static void asus_hwmon_pwm_show(struct asus_wmi *asus, int fan, int *value)
1207 {
1208         int err;
1209
1210         if (asus->asus_hwmon_pwm >= 0) {
1211                 *value = asus->asus_hwmon_pwm;
1212                 return;
1213         }
1214
1215         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, value);
1216         if (err < 0)
1217                 return;
1218
1219         *value &= 0xFF;
1220
1221         if (*value == 1) /* Low Speed */
1222                 *value = 85;
1223         else if (*value == 2)
1224                 *value = 170;
1225         else if (*value == 3)
1226                 *value = 255;
1227         else if (*value) {
1228                 pr_err("Unknown fan speed %#x\n", *value);
1229                 *value = -1;
1230         }
1231 }
1232
1233 static ssize_t pwm1_show(struct device *dev,
1234                                struct device_attribute *attr,
1235                                char *buf)
1236 {
1237         struct asus_wmi *asus = dev_get_drvdata(dev);
1238         int value;
1239
1240         asus_hwmon_pwm_show(asus, 0, &value);
1241
1242         return sprintf(buf, "%d\n", value);
1243 }
1244
1245 static ssize_t pwm1_store(struct device *dev,
1246                                      struct device_attribute *attr,
1247                                      const char *buf, size_t count) {
1248         struct asus_wmi *asus = dev_get_drvdata(dev);
1249         int value;
1250         int state;
1251         int ret;
1252
1253         ret = kstrtouint(buf, 10, &value);
1254
1255         if (ret)
1256                 return ret;
1257
1258         value = clamp(value, 0, 255);
1259
1260         state = asus_hwmon_agfn_fan_speed_write(asus, 1, &value);
1261         if (state)
1262                 pr_warn("Setting fan speed failed: %d\n", state);
1263         else
1264                 asus->asus_hwmon_fan_manual_mode = true;
1265
1266         return count;
1267 }
1268
1269 static ssize_t fan1_input_show(struct device *dev,
1270                                         struct device_attribute *attr,
1271                                         char *buf)
1272 {
1273         int value = asus_hwmon_fan_rpm_show(dev, 0);
1274
1275         return sprintf(buf, "%d\n", value < 0 ? -1 : value*100);
1276
1277 }
1278
1279 static ssize_t pwm1_enable_show(struct device *dev,
1280                                                  struct device_attribute *attr,
1281                                                  char *buf)
1282 {
1283         struct asus_wmi *asus = dev_get_drvdata(dev);
1284
1285         if (asus->asus_hwmon_fan_manual_mode)
1286                 return sprintf(buf, "%d\n", ASUS_FAN_CTRL_MANUAL);
1287
1288         return sprintf(buf, "%d\n", ASUS_FAN_CTRL_AUTO);
1289 }
1290
1291 static ssize_t pwm1_enable_store(struct device *dev,
1292                                                   struct device_attribute *attr,
1293                                                   const char *buf, size_t count)
1294 {
1295         struct asus_wmi *asus = dev_get_drvdata(dev);
1296         int status = 0;
1297         int state;
1298         int ret;
1299
1300         ret = kstrtouint(buf, 10, &state);
1301
1302         if (ret)
1303                 return ret;
1304
1305         if (state == ASUS_FAN_CTRL_MANUAL)
1306                 asus->asus_hwmon_fan_manual_mode = true;
1307         else
1308                 status = asus_hwmon_fan_set_auto(asus);
1309
1310         if (status)
1311                 return status;
1312
1313         return count;
1314 }
1315
1316 static ssize_t fan1_label_show(struct device *dev,
1317                                           struct device_attribute *attr,
1318                                           char *buf)
1319 {
1320         return sprintf(buf, "%s\n", ASUS_FAN_DESC);
1321 }
1322
1323 static ssize_t asus_hwmon_temp1(struct device *dev,
1324                                 struct device_attribute *attr,
1325                                 char *buf)
1326 {
1327         struct asus_wmi *asus = dev_get_drvdata(dev);
1328         u32 value;
1329         int err;
1330
1331         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1332
1333         if (err < 0)
1334                 return err;
1335
1336         value = DECI_KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1337
1338         return sprintf(buf, "%d\n", value);
1339 }
1340
1341 /* Fan1 */
1342 static DEVICE_ATTR_RW(pwm1);
1343 static DEVICE_ATTR_RW(pwm1_enable);
1344 static DEVICE_ATTR_RO(fan1_input);
1345 static DEVICE_ATTR_RO(fan1_label);
1346
1347 /* Temperature */
1348 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1349
1350 static struct attribute *hwmon_attributes[] = {
1351         &dev_attr_pwm1.attr,
1352         &dev_attr_pwm1_enable.attr,
1353         &dev_attr_fan1_input.attr,
1354         &dev_attr_fan1_label.attr,
1355
1356         &dev_attr_temp1_input.attr,
1357         NULL
1358 };
1359
1360 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1361                                           struct attribute *attr, int idx)
1362 {
1363         struct device *dev = container_of(kobj, struct device, kobj);
1364         struct platform_device *pdev = to_platform_device(dev->parent);
1365         struct asus_wmi *asus = platform_get_drvdata(pdev);
1366         int dev_id = -1;
1367         int fan_attr = -1;
1368         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1369         bool ok = true;
1370
1371         if (attr == &dev_attr_pwm1.attr)
1372                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1373         else if (attr == &dev_attr_temp1_input.attr)
1374                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1375
1376
1377         if (attr == &dev_attr_fan1_input.attr
1378             || attr == &dev_attr_fan1_label.attr
1379             || attr == &dev_attr_pwm1.attr
1380             || attr == &dev_attr_pwm1_enable.attr) {
1381                 fan_attr = 1;
1382         }
1383
1384         if (dev_id != -1) {
1385                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1386
1387                 if (err < 0 && fan_attr == -1)
1388                         return 0; /* can't return negative here */
1389         }
1390
1391         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1392                 /*
1393                  * We need to find a better way, probably using sfun,
1394                  * bits or spec ...
1395                  * Currently we disable it if:
1396                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1397                  * - reverved bits are non-zero
1398                  * - sfun and presence bit are not set
1399                  */
1400                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1401                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1402                         ok = false;
1403                 else
1404                         ok = fan_attr <= asus->asus_hwmon_num_fans;
1405         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1406                 /* If value is zero, something is clearly wrong */
1407                 if (!value)
1408                         ok = false;
1409         } else if (fan_attr <= asus->asus_hwmon_num_fans && fan_attr != -1) {
1410                 ok = true;
1411         } else {
1412                 ok = false;
1413         }
1414
1415         return ok ? attr->mode : 0;
1416 }
1417
1418 static const struct attribute_group hwmon_attribute_group = {
1419         .is_visible = asus_hwmon_sysfs_is_visible,
1420         .attrs = hwmon_attributes
1421 };
1422 __ATTRIBUTE_GROUPS(hwmon_attribute);
1423
1424 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1425 {
1426         struct device *hwmon;
1427
1428         hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1429                                                   "asus", asus,
1430                                                   hwmon_attribute_groups);
1431         if (IS_ERR(hwmon)) {
1432                 pr_err("Could not register asus hwmon device\n");
1433                 return PTR_ERR(hwmon);
1434         }
1435         return 0;
1436 }
1437
1438 /*
1439  * Backlight
1440  */
1441 static int read_backlight_power(struct asus_wmi *asus)
1442 {
1443         int ret;
1444         if (asus->driver->quirks->store_backlight_power)
1445                 ret = !asus->driver->panel_power;
1446         else
1447                 ret = asus_wmi_get_devstate_simple(asus,
1448                                                    ASUS_WMI_DEVID_BACKLIGHT);
1449
1450         if (ret < 0)
1451                 return ret;
1452
1453         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1454 }
1455
1456 static int read_brightness_max(struct asus_wmi *asus)
1457 {
1458         u32 retval;
1459         int err;
1460
1461         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1462
1463         if (err < 0)
1464                 return err;
1465
1466         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1467         retval >>= 8;
1468
1469         if (!retval)
1470                 return -ENODEV;
1471
1472         return retval;
1473 }
1474
1475 static int read_brightness(struct backlight_device *bd)
1476 {
1477         struct asus_wmi *asus = bl_get_data(bd);
1478         u32 retval;
1479         int err;
1480
1481         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1482
1483         if (err < 0)
1484                 return err;
1485
1486         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1487 }
1488
1489 static u32 get_scalar_command(struct backlight_device *bd)
1490 {
1491         struct asus_wmi *asus = bl_get_data(bd);
1492         u32 ctrl_param = 0;
1493
1494         if ((asus->driver->brightness < bd->props.brightness) ||
1495             bd->props.brightness == bd->props.max_brightness)
1496                 ctrl_param = 0x00008001;
1497         else if ((asus->driver->brightness > bd->props.brightness) ||
1498                  bd->props.brightness == 0)
1499                 ctrl_param = 0x00008000;
1500
1501         asus->driver->brightness = bd->props.brightness;
1502
1503         return ctrl_param;
1504 }
1505
1506 static int update_bl_status(struct backlight_device *bd)
1507 {
1508         struct asus_wmi *asus = bl_get_data(bd);
1509         u32 ctrl_param;
1510         int power, err = 0;
1511
1512         power = read_backlight_power(asus);
1513         if (power != -ENODEV && bd->props.power != power) {
1514                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1515                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1516                                             ctrl_param, NULL);
1517                 if (asus->driver->quirks->store_backlight_power)
1518                         asus->driver->panel_power = bd->props.power;
1519
1520                 /* When using scalar brightness, updating the brightness
1521                  * will mess with the backlight power */
1522                 if (asus->driver->quirks->scalar_panel_brightness)
1523                         return err;
1524         }
1525
1526         if (asus->driver->quirks->scalar_panel_brightness)
1527                 ctrl_param = get_scalar_command(bd);
1528         else
1529                 ctrl_param = bd->props.brightness;
1530
1531         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1532                                     ctrl_param, NULL);
1533
1534         return err;
1535 }
1536
1537 static const struct backlight_ops asus_wmi_bl_ops = {
1538         .get_brightness = read_brightness,
1539         .update_status = update_bl_status,
1540 };
1541
1542 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1543 {
1544         struct backlight_device *bd = asus->backlight_device;
1545         int old = bd->props.brightness;
1546         int new = old;
1547
1548         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1549                 new = code - NOTIFY_BRNUP_MIN + 1;
1550         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1551                 new = code - NOTIFY_BRNDOWN_MIN;
1552
1553         bd->props.brightness = new;
1554         backlight_update_status(bd);
1555         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1556
1557         return old;
1558 }
1559
1560 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1561 {
1562         struct backlight_device *bd;
1563         struct backlight_properties props;
1564         int max;
1565         int power;
1566
1567         max = read_brightness_max(asus);
1568         if (max < 0)
1569                 return max;
1570
1571         power = read_backlight_power(asus);
1572
1573         if (power == -ENODEV)
1574                 power = FB_BLANK_UNBLANK;
1575         else if (power < 0)
1576                 return power;
1577
1578         memset(&props, 0, sizeof(struct backlight_properties));
1579         props.type = BACKLIGHT_PLATFORM;
1580         props.max_brightness = max;
1581         bd = backlight_device_register(asus->driver->name,
1582                                        &asus->platform_device->dev, asus,
1583                                        &asus_wmi_bl_ops, &props);
1584         if (IS_ERR(bd)) {
1585                 pr_err("Could not register backlight device\n");
1586                 return PTR_ERR(bd);
1587         }
1588
1589         asus->backlight_device = bd;
1590
1591         if (asus->driver->quirks->store_backlight_power)
1592                 asus->driver->panel_power = power;
1593
1594         bd->props.brightness = read_brightness(bd);
1595         bd->props.power = power;
1596         backlight_update_status(bd);
1597
1598         asus->driver->brightness = bd->props.brightness;
1599
1600         return 0;
1601 }
1602
1603 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1604 {
1605         backlight_device_unregister(asus->backlight_device);
1606
1607         asus->backlight_device = NULL;
1608 }
1609
1610 static int is_display_toggle(int code)
1611 {
1612         /* display toggle keys */
1613         if ((code >= 0x61 && code <= 0x67) ||
1614             (code >= 0x8c && code <= 0x93) ||
1615             (code >= 0xa0 && code <= 0xa7) ||
1616             (code >= 0xd0 && code <= 0xd5))
1617                 return 1;
1618
1619         return 0;
1620 }
1621
1622 static void asus_wmi_notify(u32 value, void *context)
1623 {
1624         struct asus_wmi *asus = context;
1625         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1626         union acpi_object *obj;
1627         acpi_status status;
1628         int code;
1629         int orig_code;
1630         unsigned int key_value = 1;
1631         bool autorelease = 1;
1632
1633         status = wmi_get_event_data(value, &response);
1634         if (status != AE_OK) {
1635                 pr_err("bad event status 0x%x\n", status);
1636                 return;
1637         }
1638
1639         obj = (union acpi_object *)response.pointer;
1640
1641         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1642                 goto exit;
1643
1644         code = obj->integer.value;
1645         orig_code = code;
1646
1647         if (asus->driver->key_filter) {
1648                 asus->driver->key_filter(asus->driver, &code, &key_value,
1649                                          &autorelease);
1650                 if (code == ASUS_WMI_KEY_IGNORE)
1651                         goto exit;
1652         }
1653
1654         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1655                 code = ASUS_WMI_BRN_UP;
1656         else if (code >= NOTIFY_BRNDOWN_MIN &&
1657                  code <= NOTIFY_BRNDOWN_MAX)
1658                 code = ASUS_WMI_BRN_DOWN;
1659
1660         if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1661                 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1662                         asus_wmi_backlight_notify(asus, orig_code);
1663                         goto exit;
1664                 }
1665         }
1666
1667         if (code == NOTIFY_KBD_BRTUP) {
1668                 kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
1669                 goto exit;
1670         }
1671         if (code == NOTIFY_KBD_BRTDWN) {
1672                 kbd_led_set_by_kbd(asus, asus->kbd_led_wk - 1);
1673                 goto exit;
1674         }
1675         if (code == NOTIFY_KBD_BRTTOGGLE) {
1676                 if (asus->kbd_led_wk == asus->kbd_led.max_brightness)
1677                         kbd_led_set_by_kbd(asus, 0);
1678                 else
1679                         kbd_led_set_by_kbd(asus, asus->kbd_led_wk + 1);
1680                 goto exit;
1681         }
1682
1683         if (is_display_toggle(code) &&
1684             asus->driver->quirks->no_display_toggle)
1685                 goto exit;
1686
1687         if (!sparse_keymap_report_event(asus->inputdev, code,
1688                                         key_value, autorelease))
1689                 pr_info("Unknown key %x pressed\n", code);
1690
1691 exit:
1692         kfree(obj);
1693 }
1694
1695 /*
1696  * Sys helpers
1697  */
1698 static int parse_arg(const char *buf, unsigned long count, int *val)
1699 {
1700         if (!count)
1701                 return 0;
1702         if (sscanf(buf, "%i", val) != 1)
1703                 return -EINVAL;
1704         return count;
1705 }
1706
1707 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1708                              const char *buf, size_t count)
1709 {
1710         u32 retval;
1711         int rv, err, value;
1712
1713         value = asus_wmi_get_devstate_simple(asus, devid);
1714         if (value < 0)
1715                 return value;
1716
1717         rv = parse_arg(buf, count, &value);
1718         err = asus_wmi_set_devstate(devid, value, &retval);
1719
1720         if (err < 0)
1721                 return err;
1722
1723         return rv;
1724 }
1725
1726 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1727 {
1728         int value = asus_wmi_get_devstate_simple(asus, devid);
1729
1730         if (value < 0)
1731                 return value;
1732
1733         return sprintf(buf, "%d\n", value);
1734 }
1735
1736 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1737         static ssize_t show_##_name(struct device *dev,                 \
1738                                     struct device_attribute *attr,      \
1739                                     char *buf)                          \
1740         {                                                               \
1741                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1742                                                                         \
1743                 return show_sys_wmi(asus, _cm, buf);                    \
1744         }                                                               \
1745         static ssize_t store_##_name(struct device *dev,                \
1746                                      struct device_attribute *attr,     \
1747                                      const char *buf, size_t count)     \
1748         {                                                               \
1749                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1750                                                                         \
1751                 return store_sys_wmi(asus, _cm, buf, count);            \
1752         }                                                               \
1753         static struct device_attribute dev_attr_##_name = {             \
1754                 .attr = {                                               \
1755                         .name = __stringify(_name),                     \
1756                         .mode = _mode },                                \
1757                 .show   = show_##_name,                                 \
1758                 .store  = store_##_name,                                \
1759         }
1760
1761 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1762 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1763 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1764 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1765 ASUS_WMI_CREATE_DEVICE_ATTR(als_enable, 0644, ASUS_WMI_DEVID_ALS_ENABLE);
1766
1767 static ssize_t cpufv_store(struct device *dev, struct device_attribute *attr,
1768                            const char *buf, size_t count)
1769 {
1770         int value, rv;
1771
1772         if (!count || sscanf(buf, "%i", &value) != 1)
1773                 return -EINVAL;
1774         if (value < 0 || value > 2)
1775                 return -EINVAL;
1776
1777         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1778         if (rv < 0)
1779                 return rv;
1780
1781         return count;
1782 }
1783
1784 static DEVICE_ATTR_WO(cpufv);
1785
1786 static struct attribute *platform_attributes[] = {
1787         &dev_attr_cpufv.attr,
1788         &dev_attr_camera.attr,
1789         &dev_attr_cardr.attr,
1790         &dev_attr_touchpad.attr,
1791         &dev_attr_lid_resume.attr,
1792         &dev_attr_als_enable.attr,
1793         NULL
1794 };
1795
1796 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1797                                     struct attribute *attr, int idx)
1798 {
1799         struct device *dev = container_of(kobj, struct device, kobj);
1800         struct asus_wmi *asus = dev_get_drvdata(dev);
1801         bool ok = true;
1802         int devid = -1;
1803
1804         if (attr == &dev_attr_camera.attr)
1805                 devid = ASUS_WMI_DEVID_CAMERA;
1806         else if (attr == &dev_attr_cardr.attr)
1807                 devid = ASUS_WMI_DEVID_CARDREADER;
1808         else if (attr == &dev_attr_touchpad.attr)
1809                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1810         else if (attr == &dev_attr_lid_resume.attr)
1811                 devid = ASUS_WMI_DEVID_LID_RESUME;
1812         else if (attr == &dev_attr_als_enable.attr)
1813                 devid = ASUS_WMI_DEVID_ALS_ENABLE;
1814
1815         if (devid != -1)
1816                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1817
1818         return ok ? attr->mode : 0;
1819 }
1820
1821 static const struct attribute_group platform_attribute_group = {
1822         .is_visible = asus_sysfs_is_visible,
1823         .attrs = platform_attributes
1824 };
1825
1826 static void asus_wmi_sysfs_exit(struct platform_device *device)
1827 {
1828         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1829 }
1830
1831 static int asus_wmi_sysfs_init(struct platform_device *device)
1832 {
1833         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1834 }
1835
1836 /*
1837  * Platform device
1838  */
1839 static int asus_wmi_platform_init(struct asus_wmi *asus)
1840 {
1841         int rv;
1842
1843         /* INIT enable hotkeys on some models */
1844         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1845                 pr_info("Initialization: %#x\n", rv);
1846
1847         /* We don't know yet what to do with this version... */
1848         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1849                 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1850                 asus->spec = rv;
1851         }
1852
1853         /*
1854          * The SFUN method probably allows the original driver to get the list
1855          * of features supported by a given model. For now, 0x0100 or 0x0800
1856          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1857          * The significance of others is yet to be found.
1858          */
1859         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1860                 pr_info("SFUN value: %#x\n", rv);
1861                 asus->sfun = rv;
1862         }
1863
1864         /*
1865          * Eee PC and Notebooks seems to have different method_id for DSTS,
1866          * but it may also be related to the BIOS's SPEC.
1867          * Note, on most Eeepc, there is no way to check if a method exist
1868          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1869          * but once again, SPEC may probably be used for that kind of things.
1870          */
1871         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1872                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1873         else
1874                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1875
1876         /* CWAP allow to define the behavior of the Fn+F2 key,
1877          * this method doesn't seems to be present on Eee PCs */
1878         if (asus->driver->quirks->wapf >= 0)
1879                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1880                                       asus->driver->quirks->wapf, NULL);
1881
1882         return asus_wmi_sysfs_init(asus->platform_device);
1883 }
1884
1885 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1886 {
1887         asus_wmi_sysfs_exit(asus->platform_device);
1888 }
1889
1890 /*
1891  * debugfs
1892  */
1893 struct asus_wmi_debugfs_node {
1894         struct asus_wmi *asus;
1895         char *name;
1896         int (*show) (struct seq_file *m, void *data);
1897 };
1898
1899 static int show_dsts(struct seq_file *m, void *data)
1900 {
1901         struct asus_wmi *asus = m->private;
1902         int err;
1903         u32 retval = -1;
1904
1905         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1906
1907         if (err < 0)
1908                 return err;
1909
1910         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1911
1912         return 0;
1913 }
1914
1915 static int show_devs(struct seq_file *m, void *data)
1916 {
1917         struct asus_wmi *asus = m->private;
1918         int err;
1919         u32 retval = -1;
1920
1921         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1922                                     &retval);
1923
1924         if (err < 0)
1925                 return err;
1926
1927         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1928                    asus->debug.ctrl_param, retval);
1929
1930         return 0;
1931 }
1932
1933 static int show_call(struct seq_file *m, void *data)
1934 {
1935         struct asus_wmi *asus = m->private;
1936         struct bios_args args = {
1937                 .arg0 = asus->debug.dev_id,
1938                 .arg1 = asus->debug.ctrl_param,
1939         };
1940         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1941         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1942         union acpi_object *obj;
1943         acpi_status status;
1944
1945         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1946                                      0, asus->debug.method_id,
1947                                      &input, &output);
1948
1949         if (ACPI_FAILURE(status))
1950                 return -EIO;
1951
1952         obj = (union acpi_object *)output.pointer;
1953         if (obj && obj->type == ACPI_TYPE_INTEGER)
1954                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1955                            asus->debug.dev_id, asus->debug.ctrl_param,
1956                            (u32) obj->integer.value);
1957         else
1958                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1959                            asus->debug.dev_id, asus->debug.ctrl_param,
1960                            obj ? obj->type : -1);
1961
1962         kfree(obj);
1963
1964         return 0;
1965 }
1966
1967 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1968         {NULL, "devs", show_devs},
1969         {NULL, "dsts", show_dsts},
1970         {NULL, "call", show_call},
1971 };
1972
1973 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1974 {
1975         struct asus_wmi_debugfs_node *node = inode->i_private;
1976
1977         return single_open(file, node->show, node->asus);
1978 }
1979
1980 static const struct file_operations asus_wmi_debugfs_io_ops = {
1981         .owner = THIS_MODULE,
1982         .open = asus_wmi_debugfs_open,
1983         .read = seq_read,
1984         .llseek = seq_lseek,
1985         .release = single_release,
1986 };
1987
1988 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1989 {
1990         debugfs_remove_recursive(asus->debug.root);
1991 }
1992
1993 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1994 {
1995         struct dentry *dent;
1996         int i;
1997
1998         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1999         if (!asus->debug.root) {
2000                 pr_err("failed to create debugfs directory\n");
2001                 goto error_debugfs;
2002         }
2003
2004         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
2005                                   asus->debug.root, &asus->debug.method_id);
2006         if (!dent)
2007                 goto error_debugfs;
2008
2009         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
2010                                   asus->debug.root, &asus->debug.dev_id);
2011         if (!dent)
2012                 goto error_debugfs;
2013
2014         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
2015                                   asus->debug.root, &asus->debug.ctrl_param);
2016         if (!dent)
2017                 goto error_debugfs;
2018
2019         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
2020                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
2021
2022                 node->asus = asus;
2023                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
2024                                            asus->debug.root, node,
2025                                            &asus_wmi_debugfs_io_ops);
2026                 if (!dent) {
2027                         pr_err("failed to create debug file: %s\n", node->name);
2028                         goto error_debugfs;
2029                 }
2030         }
2031
2032         return 0;
2033
2034 error_debugfs:
2035         asus_wmi_debugfs_exit(asus);
2036         return -ENOMEM;
2037 }
2038
2039 static int asus_wmi_fan_init(struct asus_wmi *asus)
2040 {
2041         int status;
2042
2043         asus->asus_hwmon_pwm = -1;
2044         asus->asus_hwmon_num_fans = -1;
2045         asus->asus_hwmon_fan_manual_mode = false;
2046
2047         status = asus_hwmon_get_fan_number(asus, &asus->asus_hwmon_num_fans);
2048         if (status) {
2049                 asus->asus_hwmon_num_fans = 0;
2050                 pr_warn("Could not determine number of fans: %d\n", status);
2051                 return -ENXIO;
2052         }
2053
2054         pr_info("Number of fans: %d\n", asus->asus_hwmon_num_fans);
2055         return 0;
2056 }
2057
2058 /*
2059  * WMI Driver
2060  */
2061 static int asus_wmi_add(struct platform_device *pdev)
2062 {
2063         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2064         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2065         struct asus_wmi *asus;
2066         const char *chassis_type;
2067         acpi_status status;
2068         int err;
2069         u32 result;
2070
2071         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
2072         if (!asus)
2073                 return -ENOMEM;
2074
2075         asus->driver = wdrv;
2076         asus->platform_device = pdev;
2077         wdrv->platform_device = pdev;
2078         platform_set_drvdata(asus->platform_device, asus);
2079
2080         if (wdrv->detect_quirks)
2081                 wdrv->detect_quirks(asus->driver);
2082
2083         err = asus_wmi_platform_init(asus);
2084         if (err)
2085                 goto fail_platform;
2086
2087         err = asus_wmi_input_init(asus);
2088         if (err)
2089                 goto fail_input;
2090
2091         err = asus_wmi_fan_init(asus); /* probably no problems on error */
2092         asus_hwmon_fan_set_auto(asus);
2093
2094         err = asus_wmi_hwmon_init(asus);
2095         if (err)
2096                 goto fail_hwmon;
2097
2098         err = asus_wmi_led_init(asus);
2099         if (err)
2100                 goto fail_leds;
2101
2102         asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
2103         if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
2104                 asus->driver->wlan_ctrl_by_user = 1;
2105
2106         if (!(asus->driver->wlan_ctrl_by_user && ashs_present())) {
2107                 err = asus_wmi_rfkill_init(asus);
2108                 if (err)
2109                         goto fail_rfkill;
2110         }
2111
2112         if (asus->driver->quirks->wmi_force_als_set)
2113                 asus_wmi_set_als();
2114
2115         /* Some Asus desktop boards export an acpi-video backlight interface,
2116            stop this from showing up */
2117         chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
2118         if (chassis_type && !strcmp(chassis_type, "3"))
2119                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2120
2121         if (asus->driver->quirks->wmi_backlight_power)
2122                 acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2123
2124         if (asus->driver->quirks->wmi_backlight_native)
2125                 acpi_video_set_dmi_backlight_type(acpi_backlight_native);
2126
2127         if (asus->driver->quirks->xusb2pr)
2128                 asus_wmi_set_xusb2pr(asus);
2129
2130         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
2131                 err = asus_wmi_backlight_init(asus);
2132                 if (err && err != -ENODEV)
2133                         goto fail_backlight;
2134         }
2135
2136         status = wmi_install_notify_handler(asus->driver->event_guid,
2137                                             asus_wmi_notify, asus);
2138         if (ACPI_FAILURE(status)) {
2139                 pr_err("Unable to register notify handler - %d\n", status);
2140                 err = -ENODEV;
2141                 goto fail_wmi_handler;
2142         }
2143
2144         err = asus_wmi_debugfs_init(asus);
2145         if (err)
2146                 goto fail_debugfs;
2147
2148         return 0;
2149
2150 fail_debugfs:
2151         wmi_remove_notify_handler(asus->driver->event_guid);
2152 fail_wmi_handler:
2153         asus_wmi_backlight_exit(asus);
2154 fail_backlight:
2155         asus_wmi_rfkill_exit(asus);
2156 fail_rfkill:
2157         asus_wmi_led_exit(asus);
2158 fail_leds:
2159 fail_hwmon:
2160         asus_wmi_input_exit(asus);
2161 fail_input:
2162         asus_wmi_platform_exit(asus);
2163 fail_platform:
2164         kfree(asus);
2165         return err;
2166 }
2167
2168 static int asus_wmi_remove(struct platform_device *device)
2169 {
2170         struct asus_wmi *asus;
2171
2172         asus = platform_get_drvdata(device);
2173         wmi_remove_notify_handler(asus->driver->event_guid);
2174         asus_wmi_backlight_exit(asus);
2175         asus_wmi_input_exit(asus);
2176         asus_wmi_led_exit(asus);
2177         asus_wmi_rfkill_exit(asus);
2178         asus_wmi_debugfs_exit(asus);
2179         asus_wmi_platform_exit(asus);
2180         asus_hwmon_fan_set_auto(asus);
2181
2182         kfree(asus);
2183         return 0;
2184 }
2185
2186 /*
2187  * Platform driver - hibernate/resume callbacks
2188  */
2189 static int asus_hotk_thaw(struct device *device)
2190 {
2191         struct asus_wmi *asus = dev_get_drvdata(device);
2192
2193         if (asus->wlan.rfkill) {
2194                 bool wlan;
2195
2196                 /*
2197                  * Work around bios bug - acpi _PTS turns off the wireless led
2198                  * during suspend.  Normally it restores it on resume, but
2199                  * we should kick it ourselves in case hibernation is aborted.
2200                  */
2201                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
2202                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
2203         }
2204
2205         return 0;
2206 }
2207
2208 static int asus_hotk_resume(struct device *device)
2209 {
2210         struct asus_wmi *asus = dev_get_drvdata(device);
2211
2212         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2213                 kbd_led_update(asus);
2214
2215         return 0;
2216 }
2217
2218 static int asus_hotk_restore(struct device *device)
2219 {
2220         struct asus_wmi *asus = dev_get_drvdata(device);
2221         int bl;
2222
2223         /* Refresh both wlan rfkill state and pci hotplug */
2224         if (asus->wlan.rfkill)
2225                 asus_rfkill_hotplug(asus);
2226
2227         if (asus->bluetooth.rfkill) {
2228                 bl = !asus_wmi_get_devstate_simple(asus,
2229                                                    ASUS_WMI_DEVID_BLUETOOTH);
2230                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
2231         }
2232         if (asus->wimax.rfkill) {
2233                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
2234                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
2235         }
2236         if (asus->wwan3g.rfkill) {
2237                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
2238                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
2239         }
2240         if (asus->gps.rfkill) {
2241                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
2242                 rfkill_set_sw_state(asus->gps.rfkill, bl);
2243         }
2244         if (asus->uwb.rfkill) {
2245                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
2246                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
2247         }
2248         if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2249                 kbd_led_update(asus);
2250
2251         return 0;
2252 }
2253
2254 static const struct dev_pm_ops asus_pm_ops = {
2255         .thaw = asus_hotk_thaw,
2256         .restore = asus_hotk_restore,
2257         .resume = asus_hotk_resume,
2258 };
2259
2260 static int asus_wmi_probe(struct platform_device *pdev)
2261 {
2262         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2263         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2264         int ret;
2265
2266         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
2267                 pr_warn("Management GUID not found\n");
2268                 return -ENODEV;
2269         }
2270
2271         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
2272                 pr_warn("Event GUID not found\n");
2273                 return -ENODEV;
2274         }
2275
2276         if (wdrv->probe) {
2277                 ret = wdrv->probe(pdev);
2278                 if (ret)
2279                         return ret;
2280         }
2281
2282         return asus_wmi_add(pdev);
2283 }
2284
2285 static bool used;
2286
2287 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
2288 {
2289         struct platform_driver *platform_driver;
2290         struct platform_device *platform_device;
2291
2292         if (used)
2293                 return -EBUSY;
2294
2295         platform_driver = &driver->platform_driver;
2296         platform_driver->remove = asus_wmi_remove;
2297         platform_driver->driver.owner = driver->owner;
2298         platform_driver->driver.name = driver->name;
2299         platform_driver->driver.pm = &asus_pm_ops;
2300
2301         platform_device = platform_create_bundle(platform_driver,
2302                                                  asus_wmi_probe,
2303                                                  NULL, 0, NULL, 0);
2304         if (IS_ERR(platform_device))
2305                 return PTR_ERR(platform_device);
2306
2307         used = true;
2308         return 0;
2309 }
2310 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
2311
2312 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
2313 {
2314         platform_device_unregister(driver->platform_device);
2315         platform_driver_unregister(&driver->platform_driver);
2316         used = false;
2317 }
2318 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
2319
2320 static int __init asus_wmi_init(void)
2321 {
2322         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
2323                 pr_info("Asus Management GUID not found\n");
2324                 return -ENODEV;
2325         }
2326
2327         pr_info("ASUS WMI generic driver loaded\n");
2328         return 0;
2329 }
2330
2331 static void __exit asus_wmi_exit(void)
2332 {
2333         pr_info("ASUS WMI generic driver unloaded\n");
2334 }
2335
2336 module_init(asus_wmi_init);
2337 module_exit(asus_wmi_exit);