xref: /linux/drivers/platform/x86/asus-wmi.c (revision 9cfc5c90ad38c8fc11bfd39de42a107da00871ba)
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 <linux/acpi.h>
49 #include <linux/dmi.h>
50 #include <acpi/video.h>
51 
52 #include "asus-wmi.h"
53 
54 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
55 	      "Yong Wang <yong.y.wang@intel.com>");
56 MODULE_DESCRIPTION("Asus Generic WMI Driver");
57 MODULE_LICENSE("GPL");
58 
59 #define to_platform_driver(drv)					\
60 	(container_of((drv), struct platform_driver, driver))
61 
62 #define to_asus_wmi_driver(pdrv)					\
63 	(container_of((pdrv), struct asus_wmi_driver, platform_driver))
64 
65 #define ASUS_WMI_MGMT_GUID	"97845ED0-4E6D-11DE-8A39-0800200C9A66"
66 
67 #define NOTIFY_BRNUP_MIN		0x11
68 #define NOTIFY_BRNUP_MAX		0x1f
69 #define NOTIFY_BRNDOWN_MIN		0x20
70 #define NOTIFY_BRNDOWN_MAX		0x2e
71 #define NOTIFY_KBD_BRTUP		0xc4
72 #define NOTIFY_KBD_BRTDWN		0xc5
73 
74 /* WMI Methods */
75 #define ASUS_WMI_METHODID_SPEC	        0x43455053 /* BIOS SPECification */
76 #define ASUS_WMI_METHODID_SFBD		0x44424653 /* Set First Boot Device */
77 #define ASUS_WMI_METHODID_GLCD		0x44434C47 /* Get LCD status */
78 #define ASUS_WMI_METHODID_GPID		0x44495047 /* Get Panel ID?? (Resol) */
79 #define ASUS_WMI_METHODID_QMOD		0x444F4D51 /* Quiet MODe */
80 #define ASUS_WMI_METHODID_SPLV		0x4C425053 /* Set Panel Light Value */
81 #define ASUS_WMI_METHODID_AGFN		0x4E464741 /* FaN? */
82 #define ASUS_WMI_METHODID_SFUN		0x4E554653 /* FUNCtionalities */
83 #define ASUS_WMI_METHODID_SDSP		0x50534453 /* Set DiSPlay output */
84 #define ASUS_WMI_METHODID_GDSP		0x50534447 /* Get DiSPlay output */
85 #define ASUS_WMI_METHODID_DEVP		0x50564544 /* DEVice Policy */
86 #define ASUS_WMI_METHODID_OSVR		0x5256534F /* OS VeRsion */
87 #define ASUS_WMI_METHODID_DSTS		0x53544344 /* Device STatuS */
88 #define ASUS_WMI_METHODID_DSTS2		0x53545344 /* Device STatuS #2*/
89 #define ASUS_WMI_METHODID_BSTS		0x53545342 /* Bios STatuS ? */
90 #define ASUS_WMI_METHODID_DEVS		0x53564544 /* DEVice Set */
91 #define ASUS_WMI_METHODID_CFVS		0x53564643 /* CPU Frequency Volt Set */
92 #define ASUS_WMI_METHODID_KBFT		0x5446424B /* KeyBoard FilTer */
93 #define ASUS_WMI_METHODID_INIT		0x54494E49 /* INITialize */
94 #define ASUS_WMI_METHODID_HKEY		0x59454B48 /* Hot KEY ?? */
95 
96 #define ASUS_WMI_UNSUPPORTED_METHOD	0xFFFFFFFE
97 
98 /* Wireless */
99 #define ASUS_WMI_DEVID_HW_SWITCH	0x00010001
100 #define ASUS_WMI_DEVID_WIRELESS_LED	0x00010002
101 #define ASUS_WMI_DEVID_CWAP		0x00010003
102 #define ASUS_WMI_DEVID_WLAN		0x00010011
103 #define ASUS_WMI_DEVID_WLAN_LED		0x00010012
104 #define ASUS_WMI_DEVID_BLUETOOTH	0x00010013
105 #define ASUS_WMI_DEVID_GPS		0x00010015
106 #define ASUS_WMI_DEVID_WIMAX		0x00010017
107 #define ASUS_WMI_DEVID_WWAN3G		0x00010019
108 #define ASUS_WMI_DEVID_UWB		0x00010021
109 
110 /* Leds */
111 /* 0x000200XX and 0x000400XX */
112 #define ASUS_WMI_DEVID_LED1		0x00020011
113 #define ASUS_WMI_DEVID_LED2		0x00020012
114 #define ASUS_WMI_DEVID_LED3		0x00020013
115 #define ASUS_WMI_DEVID_LED4		0x00020014
116 #define ASUS_WMI_DEVID_LED5		0x00020015
117 #define ASUS_WMI_DEVID_LED6		0x00020016
118 
119 /* Backlight and Brightness */
120 #define ASUS_WMI_DEVID_BACKLIGHT	0x00050011
121 #define ASUS_WMI_DEVID_BRIGHTNESS	0x00050012
122 #define ASUS_WMI_DEVID_KBD_BACKLIGHT	0x00050021
123 #define ASUS_WMI_DEVID_LIGHT_SENSOR	0x00050022 /* ?? */
124 
125 /* Misc */
126 #define ASUS_WMI_DEVID_CAMERA		0x00060013
127 
128 /* Storage */
129 #define ASUS_WMI_DEVID_CARDREADER	0x00080013
130 
131 /* Input */
132 #define ASUS_WMI_DEVID_TOUCHPAD		0x00100011
133 #define ASUS_WMI_DEVID_TOUCHPAD_LED	0x00100012
134 
135 /* Fan, Thermal */
136 #define ASUS_WMI_DEVID_THERMAL_CTRL	0x00110011
137 #define ASUS_WMI_DEVID_FAN_CTRL		0x00110012
138 
139 /* Power */
140 #define ASUS_WMI_DEVID_PROCESSOR_STATE	0x00120012
141 
142 /* Deep S3 / Resume on LID open */
143 #define ASUS_WMI_DEVID_LID_RESUME	0x00120031
144 
145 /* DSTS masks */
146 #define ASUS_WMI_DSTS_STATUS_BIT	0x00000001
147 #define ASUS_WMI_DSTS_UNKNOWN_BIT	0x00000002
148 #define ASUS_WMI_DSTS_PRESENCE_BIT	0x00010000
149 #define ASUS_WMI_DSTS_USER_BIT		0x00020000
150 #define ASUS_WMI_DSTS_BIOS_BIT		0x00040000
151 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK	0x000000FF
152 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK	0x0000FF00
153 
154 #define ASUS_FAN_DESC			"cpu_fan"
155 #define ASUS_FAN_MFUN			0x13
156 #define ASUS_FAN_SFUN_READ		0x06
157 #define ASUS_FAN_SFUN_WRITE		0x07
158 #define ASUS_FAN_CTRL_MANUAL		1
159 #define ASUS_FAN_CTRL_AUTO		2
160 
161 struct bios_args {
162 	u32 arg0;
163 	u32 arg1;
164 } __packed;
165 
166 /*
167  * Struct that's used for all methods called via AGFN. Naming is
168  * identically to the AML code.
169  */
170 struct agfn_args {
171 	u16 mfun; /* probably "Multi-function" to be called */
172 	u16 sfun; /* probably "Sub-function" to be called */
173 	u16 len;  /* size of the hole struct, including subfunction fields */
174 	u8 stas;  /* not used by now */
175 	u8 err;   /* zero on success */
176 } __packed;
177 
178 /* struct used for calling fan read and write methods */
179 struct fan_args {
180 	struct agfn_args agfn;	/* common fields */
181 	u8 fan;			/* fan number: 0: set auto mode 1: 1st fan */
182 	u32 speed;		/* read: RPM/100 - write: 0-255 */
183 } __packed;
184 
185 /*
186  * <platform>/    - debugfs root directory
187  *   dev_id      - current dev_id
188  *   ctrl_param  - current ctrl_param
189  *   method_id   - current method_id
190  *   devs        - call DEVS(dev_id, ctrl_param) and print result
191  *   dsts        - call DSTS(dev_id)  and print result
192  *   call        - call method_id(dev_id, ctrl_param) and print result
193  */
194 struct asus_wmi_debug {
195 	struct dentry *root;
196 	u32 method_id;
197 	u32 dev_id;
198 	u32 ctrl_param;
199 };
200 
201 struct asus_rfkill {
202 	struct asus_wmi *asus;
203 	struct rfkill *rfkill;
204 	u32 dev_id;
205 };
206 
207 struct asus_wmi {
208 	int dsts_id;
209 	int spec;
210 	int sfun;
211 
212 	struct input_dev *inputdev;
213 	struct backlight_device *backlight_device;
214 	struct platform_device *platform_device;
215 
216 	struct led_classdev wlan_led;
217 	int wlan_led_wk;
218 	struct led_classdev tpd_led;
219 	int tpd_led_wk;
220 	struct led_classdev kbd_led;
221 	int kbd_led_wk;
222 	struct workqueue_struct *led_workqueue;
223 	struct work_struct tpd_led_work;
224 	struct work_struct kbd_led_work;
225 	struct work_struct wlan_led_work;
226 
227 	struct asus_rfkill wlan;
228 	struct asus_rfkill bluetooth;
229 	struct asus_rfkill wimax;
230 	struct asus_rfkill wwan3g;
231 	struct asus_rfkill gps;
232 	struct asus_rfkill uwb;
233 
234 	bool asus_hwmon_fan_manual_mode;
235 	int asus_hwmon_num_fans;
236 	int asus_hwmon_pwm;
237 
238 	struct hotplug_slot *hotplug_slot;
239 	struct mutex hotplug_lock;
240 	struct mutex wmi_lock;
241 	struct workqueue_struct *hotplug_workqueue;
242 	struct work_struct hotplug_work;
243 
244 	struct asus_wmi_debug debug;
245 
246 	struct asus_wmi_driver *driver;
247 };
248 
249 static int asus_wmi_input_init(struct asus_wmi *asus)
250 {
251 	int err;
252 
253 	asus->inputdev = input_allocate_device();
254 	if (!asus->inputdev)
255 		return -ENOMEM;
256 
257 	asus->inputdev->name = asus->driver->input_name;
258 	asus->inputdev->phys = asus->driver->input_phys;
259 	asus->inputdev->id.bustype = BUS_HOST;
260 	asus->inputdev->dev.parent = &asus->platform_device->dev;
261 	set_bit(EV_REP, asus->inputdev->evbit);
262 
263 	err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
264 	if (err)
265 		goto err_free_dev;
266 
267 	err = input_register_device(asus->inputdev);
268 	if (err)
269 		goto err_free_keymap;
270 
271 	return 0;
272 
273 err_free_keymap:
274 	sparse_keymap_free(asus->inputdev);
275 err_free_dev:
276 	input_free_device(asus->inputdev);
277 	return err;
278 }
279 
280 static void asus_wmi_input_exit(struct asus_wmi *asus)
281 {
282 	if (asus->inputdev) {
283 		sparse_keymap_free(asus->inputdev);
284 		input_unregister_device(asus->inputdev);
285 	}
286 
287 	asus->inputdev = NULL;
288 }
289 
290 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
291 				    u32 *retval)
292 {
293 	struct bios_args args = {
294 		.arg0 = arg0,
295 		.arg1 = arg1,
296 	};
297 	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
298 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
299 	acpi_status status;
300 	union acpi_object *obj;
301 	u32 tmp = 0;
302 
303 	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
304 				     &input, &output);
305 
306 	if (ACPI_FAILURE(status))
307 		goto exit;
308 
309 	obj = (union acpi_object *)output.pointer;
310 	if (obj && obj->type == ACPI_TYPE_INTEGER)
311 		tmp = (u32) obj->integer.value;
312 
313 	if (retval)
314 		*retval = tmp;
315 
316 	kfree(obj);
317 
318 exit:
319 	if (ACPI_FAILURE(status))
320 		return -EIO;
321 
322 	if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
323 		return -ENODEV;
324 
325 	return 0;
326 }
327 
328 static int asus_wmi_evaluate_method_agfn(const struct acpi_buffer args)
329 {
330 	struct acpi_buffer input;
331 	u64 phys_addr;
332 	u32 retval;
333 	u32 status = -1;
334 
335 	/*
336 	 * Copy to dma capable address otherwise memory corruption occurs as
337 	 * bios has to be able to access it.
338 	 */
339 	input.pointer = kzalloc(args.length, GFP_DMA | GFP_KERNEL);
340 	input.length = args.length;
341 	if (!input.pointer)
342 		return -ENOMEM;
343 	phys_addr = virt_to_phys(input.pointer);
344 	memcpy(input.pointer, args.pointer, args.length);
345 
346 	status = asus_wmi_evaluate_method(ASUS_WMI_METHODID_AGFN,
347 					phys_addr, 0, &retval);
348 	if (!status)
349 		memcpy(args.pointer, input.pointer, args.length);
350 
351 	kfree(input.pointer);
352 	if (status)
353 		return -ENXIO;
354 
355 	return retval;
356 }
357 
358 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
359 {
360 	return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
361 }
362 
363 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
364 				 u32 *retval)
365 {
366 	return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
367 					ctrl_param, retval);
368 }
369 
370 /* Helper for special devices with magic return codes */
371 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
372 				      u32 dev_id, u32 mask)
373 {
374 	u32 retval = 0;
375 	int err;
376 
377 	err = asus_wmi_get_devstate(asus, dev_id, &retval);
378 
379 	if (err < 0)
380 		return err;
381 
382 	if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
383 		return -ENODEV;
384 
385 	if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
386 		if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
387 			return -ENODEV;
388 	}
389 
390 	return retval & mask;
391 }
392 
393 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
394 {
395 	return asus_wmi_get_devstate_bits(asus, dev_id,
396 					  ASUS_WMI_DSTS_STATUS_BIT);
397 }
398 
399 /*
400  * LEDs
401  */
402 /*
403  * These functions actually update the LED's, and are called from a
404  * workqueue. By doing this as separate work rather than when the LED
405  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
406  * potentially bad time, such as a timer interrupt.
407  */
408 static void tpd_led_update(struct work_struct *work)
409 {
410 	int ctrl_param;
411 	struct asus_wmi *asus;
412 
413 	asus = container_of(work, struct asus_wmi, tpd_led_work);
414 
415 	ctrl_param = asus->tpd_led_wk;
416 	asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
417 }
418 
419 static void tpd_led_set(struct led_classdev *led_cdev,
420 			enum led_brightness value)
421 {
422 	struct asus_wmi *asus;
423 
424 	asus = container_of(led_cdev, struct asus_wmi, tpd_led);
425 
426 	asus->tpd_led_wk = !!value;
427 	queue_work(asus->led_workqueue, &asus->tpd_led_work);
428 }
429 
430 static int read_tpd_led_state(struct asus_wmi *asus)
431 {
432 	return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
433 }
434 
435 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
436 {
437 	struct asus_wmi *asus;
438 
439 	asus = container_of(led_cdev, struct asus_wmi, tpd_led);
440 
441 	return read_tpd_led_state(asus);
442 }
443 
444 static void kbd_led_update(struct work_struct *work)
445 {
446 	int ctrl_param = 0;
447 	struct asus_wmi *asus;
448 
449 	asus = container_of(work, struct asus_wmi, kbd_led_work);
450 
451 	/*
452 	 * bits 0-2: level
453 	 * bit 7: light on/off
454 	 */
455 	if (asus->kbd_led_wk > 0)
456 		ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
457 
458 	asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
459 }
460 
461 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
462 {
463 	int retval;
464 
465 	/*
466 	 * bits 0-2: level
467 	 * bit 7: light on/off
468 	 * bit 8-10: environment (0: dark, 1: normal, 2: light)
469 	 * bit 17: status unknown
470 	 */
471 	retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
472 					    0xFFFF);
473 
474 	/* Unknown status is considered as off */
475 	if (retval == 0x8000)
476 		retval = 0;
477 
478 	if (retval >= 0) {
479 		if (level)
480 			*level = retval & 0x7F;
481 		if (env)
482 			*env = (retval >> 8) & 0x7F;
483 		retval = 0;
484 	}
485 
486 	return retval;
487 }
488 
489 static void kbd_led_set(struct led_classdev *led_cdev,
490 			enum led_brightness value)
491 {
492 	struct asus_wmi *asus;
493 
494 	asus = container_of(led_cdev, struct asus_wmi, kbd_led);
495 
496 	if (value > asus->kbd_led.max_brightness)
497 		value = asus->kbd_led.max_brightness;
498 	else if (value < 0)
499 		value = 0;
500 
501 	asus->kbd_led_wk = value;
502 	queue_work(asus->led_workqueue, &asus->kbd_led_work);
503 }
504 
505 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
506 {
507 	struct asus_wmi *asus;
508 	int retval, value;
509 
510 	asus = container_of(led_cdev, struct asus_wmi, kbd_led);
511 
512 	retval = kbd_led_read(asus, &value, NULL);
513 
514 	if (retval < 0)
515 		return retval;
516 
517 	return value;
518 }
519 
520 static int wlan_led_unknown_state(struct asus_wmi *asus)
521 {
522 	u32 result;
523 
524 	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
525 
526 	return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
527 }
528 
529 static int wlan_led_presence(struct asus_wmi *asus)
530 {
531 	u32 result;
532 
533 	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
534 
535 	return result & ASUS_WMI_DSTS_PRESENCE_BIT;
536 }
537 
538 static void wlan_led_update(struct work_struct *work)
539 {
540 	int ctrl_param;
541 	struct asus_wmi *asus;
542 
543 	asus = container_of(work, struct asus_wmi, wlan_led_work);
544 
545 	ctrl_param = asus->wlan_led_wk;
546 	asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
547 }
548 
549 static void wlan_led_set(struct led_classdev *led_cdev,
550 			 enum led_brightness value)
551 {
552 	struct asus_wmi *asus;
553 
554 	asus = container_of(led_cdev, struct asus_wmi, wlan_led);
555 
556 	asus->wlan_led_wk = !!value;
557 	queue_work(asus->led_workqueue, &asus->wlan_led_work);
558 }
559 
560 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
561 {
562 	struct asus_wmi *asus;
563 	u32 result;
564 
565 	asus = container_of(led_cdev, struct asus_wmi, wlan_led);
566 	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
567 
568 	return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
569 }
570 
571 static void asus_wmi_led_exit(struct asus_wmi *asus)
572 {
573 	if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
574 		led_classdev_unregister(&asus->kbd_led);
575 	if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
576 		led_classdev_unregister(&asus->tpd_led);
577 	if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
578 		led_classdev_unregister(&asus->wlan_led);
579 	if (asus->led_workqueue)
580 		destroy_workqueue(asus->led_workqueue);
581 }
582 
583 static int asus_wmi_led_init(struct asus_wmi *asus)
584 {
585 	int rv = 0, led_val;
586 
587 	asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
588 	if (!asus->led_workqueue)
589 		return -ENOMEM;
590 
591 	if (read_tpd_led_state(asus) >= 0) {
592 		INIT_WORK(&asus->tpd_led_work, tpd_led_update);
593 
594 		asus->tpd_led.name = "asus::touchpad";
595 		asus->tpd_led.brightness_set = tpd_led_set;
596 		asus->tpd_led.brightness_get = tpd_led_get;
597 		asus->tpd_led.max_brightness = 1;
598 
599 		rv = led_classdev_register(&asus->platform_device->dev,
600 					   &asus->tpd_led);
601 		if (rv)
602 			goto error;
603 	}
604 
605 	led_val = kbd_led_read(asus, NULL, NULL);
606 	if (led_val >= 0) {
607 		INIT_WORK(&asus->kbd_led_work, kbd_led_update);
608 
609 		asus->kbd_led_wk = led_val;
610 		asus->kbd_led.name = "asus::kbd_backlight";
611 		asus->kbd_led.brightness_set = kbd_led_set;
612 		asus->kbd_led.brightness_get = kbd_led_get;
613 		asus->kbd_led.max_brightness = 3;
614 
615 		rv = led_classdev_register(&asus->platform_device->dev,
616 					   &asus->kbd_led);
617 		if (rv)
618 			goto error;
619 	}
620 
621 	if (wlan_led_presence(asus) && (asus->driver->quirks->wapf > 0)) {
622 		INIT_WORK(&asus->wlan_led_work, wlan_led_update);
623 
624 		asus->wlan_led.name = "asus::wlan";
625 		asus->wlan_led.brightness_set = wlan_led_set;
626 		if (!wlan_led_unknown_state(asus))
627 			asus->wlan_led.brightness_get = wlan_led_get;
628 		asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
629 		asus->wlan_led.max_brightness = 1;
630 		asus->wlan_led.default_trigger = "asus-wlan";
631 
632 		rv = led_classdev_register(&asus->platform_device->dev,
633 					   &asus->wlan_led);
634 	}
635 
636 error:
637 	if (rv)
638 		asus_wmi_led_exit(asus);
639 
640 	return rv;
641 }
642 
643 
644 /*
645  * PCI hotplug (for wlan rfkill)
646  */
647 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
648 {
649 	int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
650 
651 	if (result < 0)
652 		return false;
653 	return !result;
654 }
655 
656 static void asus_rfkill_hotplug(struct asus_wmi *asus)
657 {
658 	struct pci_dev *dev;
659 	struct pci_bus *bus;
660 	bool blocked;
661 	bool absent;
662 	u32 l;
663 
664 	mutex_lock(&asus->wmi_lock);
665 	blocked = asus_wlan_rfkill_blocked(asus);
666 	mutex_unlock(&asus->wmi_lock);
667 
668 	mutex_lock(&asus->hotplug_lock);
669 	pci_lock_rescan_remove();
670 
671 	if (asus->wlan.rfkill)
672 		rfkill_set_sw_state(asus->wlan.rfkill, blocked);
673 
674 	if (asus->hotplug_slot) {
675 		bus = pci_find_bus(0, 1);
676 		if (!bus) {
677 			pr_warn("Unable to find PCI bus 1?\n");
678 			goto out_unlock;
679 		}
680 
681 		if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
682 			pr_err("Unable to read PCI config space?\n");
683 			goto out_unlock;
684 		}
685 		absent = (l == 0xffffffff);
686 
687 		if (blocked != absent) {
688 			pr_warn("BIOS says wireless lan is %s, "
689 				"but the pci device is %s\n",
690 				blocked ? "blocked" : "unblocked",
691 				absent ? "absent" : "present");
692 			pr_warn("skipped wireless hotplug as probably "
693 				"inappropriate for this model\n");
694 			goto out_unlock;
695 		}
696 
697 		if (!blocked) {
698 			dev = pci_get_slot(bus, 0);
699 			if (dev) {
700 				/* Device already present */
701 				pci_dev_put(dev);
702 				goto out_unlock;
703 			}
704 			dev = pci_scan_single_device(bus, 0);
705 			if (dev) {
706 				pci_bus_assign_resources(bus);
707 				pci_bus_add_device(dev);
708 			}
709 		} else {
710 			dev = pci_get_slot(bus, 0);
711 			if (dev) {
712 				pci_stop_and_remove_bus_device(dev);
713 				pci_dev_put(dev);
714 			}
715 		}
716 	}
717 
718 out_unlock:
719 	pci_unlock_rescan_remove();
720 	mutex_unlock(&asus->hotplug_lock);
721 }
722 
723 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
724 {
725 	struct asus_wmi *asus = data;
726 
727 	if (event != ACPI_NOTIFY_BUS_CHECK)
728 		return;
729 
730 	/*
731 	 * We can't call directly asus_rfkill_hotplug because most
732 	 * of the time WMBC is still being executed and not reetrant.
733 	 * There is currently no way to tell ACPICA that  we want this
734 	 * method to be serialized, we schedule a asus_rfkill_hotplug
735 	 * call later, in a safer context.
736 	 */
737 	queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
738 }
739 
740 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
741 {
742 	acpi_status status;
743 	acpi_handle handle;
744 
745 	status = acpi_get_handle(NULL, node, &handle);
746 
747 	if (ACPI_SUCCESS(status)) {
748 		status = acpi_install_notify_handler(handle,
749 						     ACPI_SYSTEM_NOTIFY,
750 						     asus_rfkill_notify, asus);
751 		if (ACPI_FAILURE(status))
752 			pr_warn("Failed to register notify on %s\n", node);
753 	} else
754 		return -ENODEV;
755 
756 	return 0;
757 }
758 
759 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
760 {
761 	acpi_status status = AE_OK;
762 	acpi_handle handle;
763 
764 	status = acpi_get_handle(NULL, node, &handle);
765 
766 	if (ACPI_SUCCESS(status)) {
767 		status = acpi_remove_notify_handler(handle,
768 						    ACPI_SYSTEM_NOTIFY,
769 						    asus_rfkill_notify);
770 		if (ACPI_FAILURE(status))
771 			pr_err("Error removing rfkill notify handler %s\n",
772 			       node);
773 	}
774 }
775 
776 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
777 				   u8 *value)
778 {
779 	struct asus_wmi *asus = hotplug_slot->private;
780 	int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
781 
782 	if (result < 0)
783 		return result;
784 
785 	*value = !!result;
786 	return 0;
787 }
788 
789 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
790 {
791 	kfree(hotplug_slot->info);
792 	kfree(hotplug_slot);
793 }
794 
795 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
796 	.owner = THIS_MODULE,
797 	.get_adapter_status = asus_get_adapter_status,
798 	.get_power_status = asus_get_adapter_status,
799 };
800 
801 static void asus_hotplug_work(struct work_struct *work)
802 {
803 	struct asus_wmi *asus;
804 
805 	asus = container_of(work, struct asus_wmi, hotplug_work);
806 	asus_rfkill_hotplug(asus);
807 }
808 
809 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
810 {
811 	int ret = -ENOMEM;
812 	struct pci_bus *bus = pci_find_bus(0, 1);
813 
814 	if (!bus) {
815 		pr_err("Unable to find wifi PCI bus\n");
816 		return -ENODEV;
817 	}
818 
819 	asus->hotplug_workqueue =
820 	    create_singlethread_workqueue("hotplug_workqueue");
821 	if (!asus->hotplug_workqueue)
822 		goto error_workqueue;
823 
824 	INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
825 
826 	asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
827 	if (!asus->hotplug_slot)
828 		goto error_slot;
829 
830 	asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
831 					   GFP_KERNEL);
832 	if (!asus->hotplug_slot->info)
833 		goto error_info;
834 
835 	asus->hotplug_slot->private = asus;
836 	asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
837 	asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
838 	asus_get_adapter_status(asus->hotplug_slot,
839 				&asus->hotplug_slot->info->adapter_status);
840 
841 	ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
842 	if (ret) {
843 		pr_err("Unable to register hotplug slot - %d\n", ret);
844 		goto error_register;
845 	}
846 
847 	return 0;
848 
849 error_register:
850 	kfree(asus->hotplug_slot->info);
851 error_info:
852 	kfree(asus->hotplug_slot);
853 	asus->hotplug_slot = NULL;
854 error_slot:
855 	destroy_workqueue(asus->hotplug_workqueue);
856 error_workqueue:
857 	return ret;
858 }
859 
860 /*
861  * Rfkill devices
862  */
863 static int asus_rfkill_set(void *data, bool blocked)
864 {
865 	struct asus_rfkill *priv = data;
866 	u32 ctrl_param = !blocked;
867 	u32 dev_id = priv->dev_id;
868 
869 	/*
870 	 * If the user bit is set, BIOS can't set and record the wlan status,
871 	 * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
872 	 * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
873 	 * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
874 	 * while setting the wlan status through WMI.
875 	 * This is also the behavior that windows app will do.
876 	 */
877 	if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
878 	     priv->asus->driver->wlan_ctrl_by_user)
879 		dev_id = ASUS_WMI_DEVID_WLAN_LED;
880 
881 	return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
882 }
883 
884 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
885 {
886 	struct asus_rfkill *priv = data;
887 	int result;
888 
889 	result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
890 
891 	if (result < 0)
892 		return;
893 
894 	rfkill_set_sw_state(priv->rfkill, !result);
895 }
896 
897 static int asus_rfkill_wlan_set(void *data, bool blocked)
898 {
899 	struct asus_rfkill *priv = data;
900 	struct asus_wmi *asus = priv->asus;
901 	int ret;
902 
903 	/*
904 	 * This handler is enabled only if hotplug is enabled.
905 	 * In this case, the asus_wmi_set_devstate() will
906 	 * trigger a wmi notification and we need to wait
907 	 * this call to finish before being able to call
908 	 * any wmi method
909 	 */
910 	mutex_lock(&asus->wmi_lock);
911 	ret = asus_rfkill_set(data, blocked);
912 	mutex_unlock(&asus->wmi_lock);
913 	return ret;
914 }
915 
916 static const struct rfkill_ops asus_rfkill_wlan_ops = {
917 	.set_block = asus_rfkill_wlan_set,
918 	.query = asus_rfkill_query,
919 };
920 
921 static const struct rfkill_ops asus_rfkill_ops = {
922 	.set_block = asus_rfkill_set,
923 	.query = asus_rfkill_query,
924 };
925 
926 static int asus_new_rfkill(struct asus_wmi *asus,
927 			   struct asus_rfkill *arfkill,
928 			   const char *name, enum rfkill_type type, int dev_id)
929 {
930 	int result = asus_wmi_get_devstate_simple(asus, dev_id);
931 	struct rfkill **rfkill = &arfkill->rfkill;
932 
933 	if (result < 0)
934 		return result;
935 
936 	arfkill->dev_id = dev_id;
937 	arfkill->asus = asus;
938 
939 	if (dev_id == ASUS_WMI_DEVID_WLAN &&
940 	    asus->driver->quirks->hotplug_wireless)
941 		*rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
942 				       &asus_rfkill_wlan_ops, arfkill);
943 	else
944 		*rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
945 				       &asus_rfkill_ops, arfkill);
946 
947 	if (!*rfkill)
948 		return -EINVAL;
949 
950 	if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
951 			(asus->driver->quirks->wapf > 0))
952 		rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
953 
954 	rfkill_init_sw_state(*rfkill, !result);
955 	result = rfkill_register(*rfkill);
956 	if (result) {
957 		rfkill_destroy(*rfkill);
958 		*rfkill = NULL;
959 		return result;
960 	}
961 	return 0;
962 }
963 
964 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
965 {
966 	asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
967 	asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
968 	asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
969 	if (asus->wlan.rfkill) {
970 		rfkill_unregister(asus->wlan.rfkill);
971 		rfkill_destroy(asus->wlan.rfkill);
972 		asus->wlan.rfkill = NULL;
973 	}
974 	/*
975 	 * Refresh pci hotplug in case the rfkill state was changed after
976 	 * asus_unregister_rfkill_notifier()
977 	 */
978 	asus_rfkill_hotplug(asus);
979 	if (asus->hotplug_slot)
980 		pci_hp_deregister(asus->hotplug_slot);
981 	if (asus->hotplug_workqueue)
982 		destroy_workqueue(asus->hotplug_workqueue);
983 
984 	if (asus->bluetooth.rfkill) {
985 		rfkill_unregister(asus->bluetooth.rfkill);
986 		rfkill_destroy(asus->bluetooth.rfkill);
987 		asus->bluetooth.rfkill = NULL;
988 	}
989 	if (asus->wimax.rfkill) {
990 		rfkill_unregister(asus->wimax.rfkill);
991 		rfkill_destroy(asus->wimax.rfkill);
992 		asus->wimax.rfkill = NULL;
993 	}
994 	if (asus->wwan3g.rfkill) {
995 		rfkill_unregister(asus->wwan3g.rfkill);
996 		rfkill_destroy(asus->wwan3g.rfkill);
997 		asus->wwan3g.rfkill = NULL;
998 	}
999 	if (asus->gps.rfkill) {
1000 		rfkill_unregister(asus->gps.rfkill);
1001 		rfkill_destroy(asus->gps.rfkill);
1002 		asus->gps.rfkill = NULL;
1003 	}
1004 	if (asus->uwb.rfkill) {
1005 		rfkill_unregister(asus->uwb.rfkill);
1006 		rfkill_destroy(asus->uwb.rfkill);
1007 		asus->uwb.rfkill = NULL;
1008 	}
1009 }
1010 
1011 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
1012 {
1013 	int result = 0;
1014 
1015 	mutex_init(&asus->hotplug_lock);
1016 	mutex_init(&asus->wmi_lock);
1017 
1018 	result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
1019 				 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
1020 
1021 	if (result && result != -ENODEV)
1022 		goto exit;
1023 
1024 	result = asus_new_rfkill(asus, &asus->bluetooth,
1025 				 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
1026 				 ASUS_WMI_DEVID_BLUETOOTH);
1027 
1028 	if (result && result != -ENODEV)
1029 		goto exit;
1030 
1031 	result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
1032 				 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
1033 
1034 	if (result && result != -ENODEV)
1035 		goto exit;
1036 
1037 	result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
1038 				 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
1039 
1040 	if (result && result != -ENODEV)
1041 		goto exit;
1042 
1043 	result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
1044 				 RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
1045 
1046 	if (result && result != -ENODEV)
1047 		goto exit;
1048 
1049 	result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
1050 				 RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
1051 
1052 	if (result && result != -ENODEV)
1053 		goto exit;
1054 
1055 	if (!asus->driver->quirks->hotplug_wireless)
1056 		goto exit;
1057 
1058 	result = asus_setup_pci_hotplug(asus);
1059 	/*
1060 	 * If we get -EBUSY then something else is handling the PCI hotplug -
1061 	 * don't fail in this case
1062 	 */
1063 	if (result == -EBUSY)
1064 		result = 0;
1065 
1066 	asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1067 	asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1068 	asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1069 	/*
1070 	 * Refresh pci hotplug in case the rfkill state was changed during
1071 	 * setup.
1072 	 */
1073 	asus_rfkill_hotplug(asus);
1074 
1075 exit:
1076 	if (result && result != -ENODEV)
1077 		asus_wmi_rfkill_exit(asus);
1078 
1079 	if (result == -ENODEV)
1080 		result = 0;
1081 
1082 	return result;
1083 }
1084 
1085 /*
1086  * Hwmon device
1087  */
1088 static int asus_hwmon_agfn_fan_speed_read(struct asus_wmi *asus, int fan,
1089 					  int *speed)
1090 {
1091 	struct fan_args args = {
1092 		.agfn.len = sizeof(args),
1093 		.agfn.mfun = ASUS_FAN_MFUN,
1094 		.agfn.sfun = ASUS_FAN_SFUN_READ,
1095 		.fan = fan,
1096 		.speed = 0,
1097 	};
1098 	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1099 	int status;
1100 
1101 	if (fan != 1)
1102 		return -EINVAL;
1103 
1104 	status = asus_wmi_evaluate_method_agfn(input);
1105 
1106 	if (status || args.agfn.err)
1107 		return -ENXIO;
1108 
1109 	if (speed)
1110 		*speed = args.speed;
1111 
1112 	return 0;
1113 }
1114 
1115 static int asus_hwmon_agfn_fan_speed_write(struct asus_wmi *asus, int fan,
1116 				     int *speed)
1117 {
1118 	struct fan_args args = {
1119 		.agfn.len = sizeof(args),
1120 		.agfn.mfun = ASUS_FAN_MFUN,
1121 		.agfn.sfun = ASUS_FAN_SFUN_WRITE,
1122 		.fan = fan,
1123 		.speed = speed ?  *speed : 0,
1124 	};
1125 	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1126 	int status;
1127 
1128 	/* 1: for setting 1st fan's speed 0: setting auto mode */
1129 	if (fan != 1 && fan != 0)
1130 		return -EINVAL;
1131 
1132 	status = asus_wmi_evaluate_method_agfn(input);
1133 
1134 	if (status || args.agfn.err)
1135 		return -ENXIO;
1136 
1137 	if (speed && fan == 1)
1138 		asus->asus_hwmon_pwm = *speed;
1139 
1140 	return 0;
1141 }
1142 
1143 /*
1144  * Check if we can read the speed of one fan. If true we assume we can also
1145  * control it.
1146  */
1147 static int asus_hwmon_get_fan_number(struct asus_wmi *asus, int *num_fans)
1148 {
1149 	int status;
1150 	int speed = 0;
1151 
1152 	*num_fans = 0;
1153 
1154 	status = asus_hwmon_agfn_fan_speed_read(asus, 1, &speed);
1155 	if (!status)
1156 		*num_fans = 1;
1157 
1158 	return 0;
1159 }
1160 
1161 static int asus_hwmon_fan_set_auto(struct asus_wmi *asus)
1162 {
1163 	int status;
1164 
1165 	status = asus_hwmon_agfn_fan_speed_write(asus, 0, NULL);
1166 	if (status)
1167 		return -ENXIO;
1168 
1169 	asus->asus_hwmon_fan_manual_mode = false;
1170 
1171 	return 0;
1172 }
1173 
1174 static int asus_hwmon_fan_rpm_show(struct device *dev, int fan)
1175 {
1176 	struct asus_wmi *asus = dev_get_drvdata(dev);
1177 	int value;
1178 	int ret;
1179 
1180 	/* no speed readable on manual mode */
1181 	if (asus->asus_hwmon_fan_manual_mode)
1182 		return -ENXIO;
1183 
1184 	ret = asus_hwmon_agfn_fan_speed_read(asus, fan+1, &value);
1185 	if (ret) {
1186 		pr_warn("reading fan speed failed: %d\n", ret);
1187 		return -ENXIO;
1188 	}
1189 
1190 	return value;
1191 }
1192 
1193 static void asus_hwmon_pwm_show(struct asus_wmi *asus, int fan, int *value)
1194 {
1195 	int err;
1196 
1197 	if (asus->asus_hwmon_pwm >= 0) {
1198 		*value = asus->asus_hwmon_pwm;
1199 		return;
1200 	}
1201 
1202 	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, value);
1203 	if (err < 0)
1204 		return;
1205 
1206 	*value &= 0xFF;
1207 
1208 	if (*value == 1) /* Low Speed */
1209 		*value = 85;
1210 	else if (*value == 2)
1211 		*value = 170;
1212 	else if (*value == 3)
1213 		*value = 255;
1214 	else if (*value) {
1215 		pr_err("Unknown fan speed %#x\n", *value);
1216 		*value = -1;
1217 	}
1218 }
1219 
1220 static ssize_t pwm1_show(struct device *dev,
1221 			       struct device_attribute *attr,
1222 			       char *buf)
1223 {
1224 	struct asus_wmi *asus = dev_get_drvdata(dev);
1225 	int value;
1226 
1227 	asus_hwmon_pwm_show(asus, 0, &value);
1228 
1229 	return sprintf(buf, "%d\n", value);
1230 }
1231 
1232 static ssize_t pwm1_store(struct device *dev,
1233 				     struct device_attribute *attr,
1234 				     const char *buf, size_t count) {
1235 	struct asus_wmi *asus = dev_get_drvdata(dev);
1236 	int value;
1237 	int state;
1238 	int ret;
1239 
1240 	ret = kstrtouint(buf, 10, &value);
1241 
1242 	if (ret)
1243 		return ret;
1244 
1245 	value = clamp(value, 0, 255);
1246 
1247 	state = asus_hwmon_agfn_fan_speed_write(asus, 1, &value);
1248 	if (state)
1249 		pr_warn("Setting fan speed failed: %d\n", state);
1250 	else
1251 		asus->asus_hwmon_fan_manual_mode = true;
1252 
1253 	return count;
1254 }
1255 
1256 static ssize_t fan1_input_show(struct device *dev,
1257 					struct device_attribute *attr,
1258 					char *buf)
1259 {
1260 	int value = asus_hwmon_fan_rpm_show(dev, 0);
1261 
1262 	return sprintf(buf, "%d\n", value < 0 ? -1 : value*100);
1263 
1264 }
1265 
1266 static ssize_t pwm1_enable_show(struct device *dev,
1267 						 struct device_attribute *attr,
1268 						 char *buf)
1269 {
1270 	struct asus_wmi *asus = dev_get_drvdata(dev);
1271 
1272 	if (asus->asus_hwmon_fan_manual_mode)
1273 		return sprintf(buf, "%d\n", ASUS_FAN_CTRL_MANUAL);
1274 
1275 	return sprintf(buf, "%d\n", ASUS_FAN_CTRL_AUTO);
1276 }
1277 
1278 static ssize_t pwm1_enable_store(struct device *dev,
1279 						  struct device_attribute *attr,
1280 						  const char *buf, size_t count)
1281 {
1282 	struct asus_wmi *asus = dev_get_drvdata(dev);
1283 	int status = 0;
1284 	int state;
1285 	int ret;
1286 
1287 	ret = kstrtouint(buf, 10, &state);
1288 
1289 	if (ret)
1290 		return ret;
1291 
1292 	if (state == ASUS_FAN_CTRL_MANUAL)
1293 		asus->asus_hwmon_fan_manual_mode = true;
1294 	else
1295 		status = asus_hwmon_fan_set_auto(asus);
1296 
1297 	if (status)
1298 		return status;
1299 
1300 	return count;
1301 }
1302 
1303 static ssize_t fan1_label_show(struct device *dev,
1304 					  struct device_attribute *attr,
1305 					  char *buf)
1306 {
1307 	return sprintf(buf, "%s\n", ASUS_FAN_DESC);
1308 }
1309 
1310 static ssize_t asus_hwmon_temp1(struct device *dev,
1311 				struct device_attribute *attr,
1312 				char *buf)
1313 {
1314 	struct asus_wmi *asus = dev_get_drvdata(dev);
1315 	u32 value;
1316 	int err;
1317 
1318 	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1319 
1320 	if (err < 0)
1321 		return err;
1322 
1323 	value = DECI_KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1324 
1325 	return sprintf(buf, "%d\n", value);
1326 }
1327 
1328 /* Fan1 */
1329 static DEVICE_ATTR_RW(pwm1);
1330 static DEVICE_ATTR_RW(pwm1_enable);
1331 static DEVICE_ATTR_RO(fan1_input);
1332 static DEVICE_ATTR_RO(fan1_label);
1333 
1334 /* Temperature */
1335 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1336 
1337 static struct attribute *hwmon_attributes[] = {
1338 	&dev_attr_pwm1.attr,
1339 	&dev_attr_pwm1_enable.attr,
1340 	&dev_attr_fan1_input.attr,
1341 	&dev_attr_fan1_label.attr,
1342 
1343 	&dev_attr_temp1_input.attr,
1344 	NULL
1345 };
1346 
1347 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1348 					  struct attribute *attr, int idx)
1349 {
1350 	struct device *dev = container_of(kobj, struct device, kobj);
1351 	struct platform_device *pdev = to_platform_device(dev->parent);
1352 	struct asus_wmi *asus = platform_get_drvdata(pdev);
1353 	int dev_id = -1;
1354 	int fan_attr = -1;
1355 	u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1356 	bool ok = true;
1357 
1358 	if (attr == &dev_attr_pwm1.attr)
1359 		dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1360 	else if (attr == &dev_attr_temp1_input.attr)
1361 		dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1362 
1363 
1364 	if (attr == &dev_attr_fan1_input.attr
1365 	    || attr == &dev_attr_fan1_label.attr
1366 	    || attr == &dev_attr_pwm1.attr
1367 	    || attr == &dev_attr_pwm1_enable.attr) {
1368 		fan_attr = 1;
1369 	}
1370 
1371 	if (dev_id != -1) {
1372 		int err = asus_wmi_get_devstate(asus, dev_id, &value);
1373 
1374 		if (err < 0 && fan_attr == -1)
1375 			return 0; /* can't return negative here */
1376 	}
1377 
1378 	if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1379 		/*
1380 		 * We need to find a better way, probably using sfun,
1381 		 * bits or spec ...
1382 		 * Currently we disable it if:
1383 		 * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1384 		 * - reverved bits are non-zero
1385 		 * - sfun and presence bit are not set
1386 		 */
1387 		if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1388 		    || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1389 			ok = false;
1390 		else
1391 			ok = fan_attr <= asus->asus_hwmon_num_fans;
1392 	} else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1393 		/* If value is zero, something is clearly wrong */
1394 		if (!value)
1395 			ok = false;
1396 	} else if (fan_attr <= asus->asus_hwmon_num_fans && fan_attr != -1) {
1397 		ok = true;
1398 	} else {
1399 		ok = false;
1400 	}
1401 
1402 	return ok ? attr->mode : 0;
1403 }
1404 
1405 static struct attribute_group hwmon_attribute_group = {
1406 	.is_visible = asus_hwmon_sysfs_is_visible,
1407 	.attrs = hwmon_attributes
1408 };
1409 __ATTRIBUTE_GROUPS(hwmon_attribute);
1410 
1411 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1412 {
1413 	struct device *hwmon;
1414 
1415 	hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1416 						  "asus", asus,
1417 						  hwmon_attribute_groups);
1418 	if (IS_ERR(hwmon)) {
1419 		pr_err("Could not register asus hwmon device\n");
1420 		return PTR_ERR(hwmon);
1421 	}
1422 	return 0;
1423 }
1424 
1425 /*
1426  * Backlight
1427  */
1428 static int read_backlight_power(struct asus_wmi *asus)
1429 {
1430 	int ret;
1431 	if (asus->driver->quirks->store_backlight_power)
1432 		ret = !asus->driver->panel_power;
1433 	else
1434 		ret = asus_wmi_get_devstate_simple(asus,
1435 						   ASUS_WMI_DEVID_BACKLIGHT);
1436 
1437 	if (ret < 0)
1438 		return ret;
1439 
1440 	return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1441 }
1442 
1443 static int read_brightness_max(struct asus_wmi *asus)
1444 {
1445 	u32 retval;
1446 	int err;
1447 
1448 	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1449 
1450 	if (err < 0)
1451 		return err;
1452 
1453 	retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1454 	retval >>= 8;
1455 
1456 	if (!retval)
1457 		return -ENODEV;
1458 
1459 	return retval;
1460 }
1461 
1462 static int read_brightness(struct backlight_device *bd)
1463 {
1464 	struct asus_wmi *asus = bl_get_data(bd);
1465 	u32 retval;
1466 	int err;
1467 
1468 	err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1469 
1470 	if (err < 0)
1471 		return err;
1472 
1473 	return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1474 }
1475 
1476 static u32 get_scalar_command(struct backlight_device *bd)
1477 {
1478 	struct asus_wmi *asus = bl_get_data(bd);
1479 	u32 ctrl_param = 0;
1480 
1481 	if ((asus->driver->brightness < bd->props.brightness) ||
1482 	    bd->props.brightness == bd->props.max_brightness)
1483 		ctrl_param = 0x00008001;
1484 	else if ((asus->driver->brightness > bd->props.brightness) ||
1485 		 bd->props.brightness == 0)
1486 		ctrl_param = 0x00008000;
1487 
1488 	asus->driver->brightness = bd->props.brightness;
1489 
1490 	return ctrl_param;
1491 }
1492 
1493 static int update_bl_status(struct backlight_device *bd)
1494 {
1495 	struct asus_wmi *asus = bl_get_data(bd);
1496 	u32 ctrl_param;
1497 	int power, err = 0;
1498 
1499 	power = read_backlight_power(asus);
1500 	if (power != -ENODEV && bd->props.power != power) {
1501 		ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1502 		err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1503 					    ctrl_param, NULL);
1504 		if (asus->driver->quirks->store_backlight_power)
1505 			asus->driver->panel_power = bd->props.power;
1506 
1507 		/* When using scalar brightness, updating the brightness
1508 		 * will mess with the backlight power */
1509 		if (asus->driver->quirks->scalar_panel_brightness)
1510 			return err;
1511 	}
1512 
1513 	if (asus->driver->quirks->scalar_panel_brightness)
1514 		ctrl_param = get_scalar_command(bd);
1515 	else
1516 		ctrl_param = bd->props.brightness;
1517 
1518 	err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1519 				    ctrl_param, NULL);
1520 
1521 	return err;
1522 }
1523 
1524 static const struct backlight_ops asus_wmi_bl_ops = {
1525 	.get_brightness = read_brightness,
1526 	.update_status = update_bl_status,
1527 };
1528 
1529 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1530 {
1531 	struct backlight_device *bd = asus->backlight_device;
1532 	int old = bd->props.brightness;
1533 	int new = old;
1534 
1535 	if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1536 		new = code - NOTIFY_BRNUP_MIN + 1;
1537 	else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1538 		new = code - NOTIFY_BRNDOWN_MIN;
1539 
1540 	bd->props.brightness = new;
1541 	backlight_update_status(bd);
1542 	backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1543 
1544 	return old;
1545 }
1546 
1547 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1548 {
1549 	struct backlight_device *bd;
1550 	struct backlight_properties props;
1551 	int max;
1552 	int power;
1553 
1554 	max = read_brightness_max(asus);
1555 	if (max < 0)
1556 		return max;
1557 
1558 	power = read_backlight_power(asus);
1559 
1560 	if (power == -ENODEV)
1561 		power = FB_BLANK_UNBLANK;
1562 	else if (power < 0)
1563 		return power;
1564 
1565 	memset(&props, 0, sizeof(struct backlight_properties));
1566 	props.type = BACKLIGHT_PLATFORM;
1567 	props.max_brightness = max;
1568 	bd = backlight_device_register(asus->driver->name,
1569 				       &asus->platform_device->dev, asus,
1570 				       &asus_wmi_bl_ops, &props);
1571 	if (IS_ERR(bd)) {
1572 		pr_err("Could not register backlight device\n");
1573 		return PTR_ERR(bd);
1574 	}
1575 
1576 	asus->backlight_device = bd;
1577 
1578 	if (asus->driver->quirks->store_backlight_power)
1579 		asus->driver->panel_power = power;
1580 
1581 	bd->props.brightness = read_brightness(bd);
1582 	bd->props.power = power;
1583 	backlight_update_status(bd);
1584 
1585 	asus->driver->brightness = bd->props.brightness;
1586 
1587 	return 0;
1588 }
1589 
1590 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1591 {
1592 	backlight_device_unregister(asus->backlight_device);
1593 
1594 	asus->backlight_device = NULL;
1595 }
1596 
1597 static int is_display_toggle(int code)
1598 {
1599 	/* display toggle keys */
1600 	if ((code >= 0x61 && code <= 0x67) ||
1601 	    (code >= 0x8c && code <= 0x93) ||
1602 	    (code >= 0xa0 && code <= 0xa7) ||
1603 	    (code >= 0xd0 && code <= 0xd5))
1604 		return 1;
1605 
1606 	return 0;
1607 }
1608 
1609 static void asus_wmi_notify(u32 value, void *context)
1610 {
1611 	struct asus_wmi *asus = context;
1612 	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1613 	union acpi_object *obj;
1614 	acpi_status status;
1615 	int code;
1616 	int orig_code;
1617 	unsigned int key_value = 1;
1618 	bool autorelease = 1;
1619 
1620 	status = wmi_get_event_data(value, &response);
1621 	if (status != AE_OK) {
1622 		pr_err("bad event status 0x%x\n", status);
1623 		return;
1624 	}
1625 
1626 	obj = (union acpi_object *)response.pointer;
1627 
1628 	if (!obj || obj->type != ACPI_TYPE_INTEGER)
1629 		goto exit;
1630 
1631 	code = obj->integer.value;
1632 	orig_code = code;
1633 
1634 	if (asus->driver->key_filter) {
1635 		asus->driver->key_filter(asus->driver, &code, &key_value,
1636 					 &autorelease);
1637 		if (code == ASUS_WMI_KEY_IGNORE)
1638 			goto exit;
1639 	}
1640 
1641 	if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1642 		code = ASUS_WMI_BRN_UP;
1643 	else if (code >= NOTIFY_BRNDOWN_MIN &&
1644 		 code <= NOTIFY_BRNDOWN_MAX)
1645 		code = ASUS_WMI_BRN_DOWN;
1646 
1647 	if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1648 		if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1649 			asus_wmi_backlight_notify(asus, orig_code);
1650 			goto exit;
1651 		}
1652 	}
1653 
1654 	if (is_display_toggle(code) &&
1655 	    asus->driver->quirks->no_display_toggle)
1656 		goto exit;
1657 
1658 	if (!sparse_keymap_report_event(asus->inputdev, code,
1659 					key_value, autorelease))
1660 		pr_info("Unknown key %x pressed\n", code);
1661 
1662 exit:
1663 	kfree(obj);
1664 }
1665 
1666 /*
1667  * Sys helpers
1668  */
1669 static int parse_arg(const char *buf, unsigned long count, int *val)
1670 {
1671 	if (!count)
1672 		return 0;
1673 	if (sscanf(buf, "%i", val) != 1)
1674 		return -EINVAL;
1675 	return count;
1676 }
1677 
1678 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1679 			     const char *buf, size_t count)
1680 {
1681 	u32 retval;
1682 	int rv, err, value;
1683 
1684 	value = asus_wmi_get_devstate_simple(asus, devid);
1685 	if (value < 0)
1686 		return value;
1687 
1688 	rv = parse_arg(buf, count, &value);
1689 	err = asus_wmi_set_devstate(devid, value, &retval);
1690 
1691 	if (err < 0)
1692 		return err;
1693 
1694 	return rv;
1695 }
1696 
1697 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1698 {
1699 	int value = asus_wmi_get_devstate_simple(asus, devid);
1700 
1701 	if (value < 0)
1702 		return value;
1703 
1704 	return sprintf(buf, "%d\n", value);
1705 }
1706 
1707 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)			\
1708 	static ssize_t show_##_name(struct device *dev,			\
1709 				    struct device_attribute *attr,	\
1710 				    char *buf)				\
1711 	{								\
1712 		struct asus_wmi *asus = dev_get_drvdata(dev);		\
1713 									\
1714 		return show_sys_wmi(asus, _cm, buf);			\
1715 	}								\
1716 	static ssize_t store_##_name(struct device *dev,		\
1717 				     struct device_attribute *attr,	\
1718 				     const char *buf, size_t count)	\
1719 	{								\
1720 		struct asus_wmi *asus = dev_get_drvdata(dev);		\
1721 									\
1722 		return store_sys_wmi(asus, _cm, buf, count);		\
1723 	}								\
1724 	static struct device_attribute dev_attr_##_name = {		\
1725 		.attr = {						\
1726 			.name = __stringify(_name),			\
1727 			.mode = _mode },				\
1728 		.show   = show_##_name,					\
1729 		.store  = store_##_name,				\
1730 	}
1731 
1732 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1733 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1734 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1735 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1736 
1737 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1738 			   const char *buf, size_t count)
1739 {
1740 	int value, rv;
1741 
1742 	if (!count || sscanf(buf, "%i", &value) != 1)
1743 		return -EINVAL;
1744 	if (value < 0 || value > 2)
1745 		return -EINVAL;
1746 
1747 	rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1748 	if (rv < 0)
1749 		return rv;
1750 
1751 	return count;
1752 }
1753 
1754 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1755 
1756 static struct attribute *platform_attributes[] = {
1757 	&dev_attr_cpufv.attr,
1758 	&dev_attr_camera.attr,
1759 	&dev_attr_cardr.attr,
1760 	&dev_attr_touchpad.attr,
1761 	&dev_attr_lid_resume.attr,
1762 	NULL
1763 };
1764 
1765 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1766 				    struct attribute *attr, int idx)
1767 {
1768 	struct device *dev = container_of(kobj, struct device, kobj);
1769 	struct platform_device *pdev = to_platform_device(dev);
1770 	struct asus_wmi *asus = platform_get_drvdata(pdev);
1771 	bool ok = true;
1772 	int devid = -1;
1773 
1774 	if (attr == &dev_attr_camera.attr)
1775 		devid = ASUS_WMI_DEVID_CAMERA;
1776 	else if (attr == &dev_attr_cardr.attr)
1777 		devid = ASUS_WMI_DEVID_CARDREADER;
1778 	else if (attr == &dev_attr_touchpad.attr)
1779 		devid = ASUS_WMI_DEVID_TOUCHPAD;
1780 	else if (attr == &dev_attr_lid_resume.attr)
1781 		devid = ASUS_WMI_DEVID_LID_RESUME;
1782 
1783 	if (devid != -1)
1784 		ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1785 
1786 	return ok ? attr->mode : 0;
1787 }
1788 
1789 static struct attribute_group platform_attribute_group = {
1790 	.is_visible = asus_sysfs_is_visible,
1791 	.attrs = platform_attributes
1792 };
1793 
1794 static void asus_wmi_sysfs_exit(struct platform_device *device)
1795 {
1796 	sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1797 }
1798 
1799 static int asus_wmi_sysfs_init(struct platform_device *device)
1800 {
1801 	return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1802 }
1803 
1804 /*
1805  * Platform device
1806  */
1807 static int asus_wmi_platform_init(struct asus_wmi *asus)
1808 {
1809 	int rv;
1810 
1811 	/* INIT enable hotkeys on some models */
1812 	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1813 		pr_info("Initialization: %#x\n", rv);
1814 
1815 	/* We don't know yet what to do with this version... */
1816 	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1817 		pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1818 		asus->spec = rv;
1819 	}
1820 
1821 	/*
1822 	 * The SFUN method probably allows the original driver to get the list
1823 	 * of features supported by a given model. For now, 0x0100 or 0x0800
1824 	 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1825 	 * The significance of others is yet to be found.
1826 	 */
1827 	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1828 		pr_info("SFUN value: %#x\n", rv);
1829 		asus->sfun = rv;
1830 	}
1831 
1832 	/*
1833 	 * Eee PC and Notebooks seems to have different method_id for DSTS,
1834 	 * but it may also be related to the BIOS's SPEC.
1835 	 * Note, on most Eeepc, there is no way to check if a method exist
1836 	 * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1837 	 * but once again, SPEC may probably be used for that kind of things.
1838 	 */
1839 	if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1840 		asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1841 	else
1842 		asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1843 
1844 	/* CWAP allow to define the behavior of the Fn+F2 key,
1845 	 * this method doesn't seems to be present on Eee PCs */
1846 	if (asus->driver->quirks->wapf >= 0)
1847 		asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1848 				      asus->driver->quirks->wapf, NULL);
1849 
1850 	return asus_wmi_sysfs_init(asus->platform_device);
1851 }
1852 
1853 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1854 {
1855 	asus_wmi_sysfs_exit(asus->platform_device);
1856 }
1857 
1858 /*
1859  * debugfs
1860  */
1861 struct asus_wmi_debugfs_node {
1862 	struct asus_wmi *asus;
1863 	char *name;
1864 	int (*show) (struct seq_file *m, void *data);
1865 };
1866 
1867 static int show_dsts(struct seq_file *m, void *data)
1868 {
1869 	struct asus_wmi *asus = m->private;
1870 	int err;
1871 	u32 retval = -1;
1872 
1873 	err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1874 
1875 	if (err < 0)
1876 		return err;
1877 
1878 	seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1879 
1880 	return 0;
1881 }
1882 
1883 static int show_devs(struct seq_file *m, void *data)
1884 {
1885 	struct asus_wmi *asus = m->private;
1886 	int err;
1887 	u32 retval = -1;
1888 
1889 	err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1890 				    &retval);
1891 
1892 	if (err < 0)
1893 		return err;
1894 
1895 	seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1896 		   asus->debug.ctrl_param, retval);
1897 
1898 	return 0;
1899 }
1900 
1901 static int show_call(struct seq_file *m, void *data)
1902 {
1903 	struct asus_wmi *asus = m->private;
1904 	struct bios_args args = {
1905 		.arg0 = asus->debug.dev_id,
1906 		.arg1 = asus->debug.ctrl_param,
1907 	};
1908 	struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1909 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1910 	union acpi_object *obj;
1911 	acpi_status status;
1912 
1913 	status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1914 				     1, asus->debug.method_id,
1915 				     &input, &output);
1916 
1917 	if (ACPI_FAILURE(status))
1918 		return -EIO;
1919 
1920 	obj = (union acpi_object *)output.pointer;
1921 	if (obj && obj->type == ACPI_TYPE_INTEGER)
1922 		seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1923 			   asus->debug.dev_id, asus->debug.ctrl_param,
1924 			   (u32) obj->integer.value);
1925 	else
1926 		seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1927 			   asus->debug.dev_id, asus->debug.ctrl_param,
1928 			   obj ? obj->type : -1);
1929 
1930 	kfree(obj);
1931 
1932 	return 0;
1933 }
1934 
1935 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1936 	{NULL, "devs", show_devs},
1937 	{NULL, "dsts", show_dsts},
1938 	{NULL, "call", show_call},
1939 };
1940 
1941 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1942 {
1943 	struct asus_wmi_debugfs_node *node = inode->i_private;
1944 
1945 	return single_open(file, node->show, node->asus);
1946 }
1947 
1948 static const struct file_operations asus_wmi_debugfs_io_ops = {
1949 	.owner = THIS_MODULE,
1950 	.open = asus_wmi_debugfs_open,
1951 	.read = seq_read,
1952 	.llseek = seq_lseek,
1953 	.release = single_release,
1954 };
1955 
1956 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1957 {
1958 	debugfs_remove_recursive(asus->debug.root);
1959 }
1960 
1961 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1962 {
1963 	struct dentry *dent;
1964 	int i;
1965 
1966 	asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1967 	if (!asus->debug.root) {
1968 		pr_err("failed to create debugfs directory\n");
1969 		goto error_debugfs;
1970 	}
1971 
1972 	dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1973 				  asus->debug.root, &asus->debug.method_id);
1974 	if (!dent)
1975 		goto error_debugfs;
1976 
1977 	dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1978 				  asus->debug.root, &asus->debug.dev_id);
1979 	if (!dent)
1980 		goto error_debugfs;
1981 
1982 	dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1983 				  asus->debug.root, &asus->debug.ctrl_param);
1984 	if (!dent)
1985 		goto error_debugfs;
1986 
1987 	for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1988 		struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1989 
1990 		node->asus = asus;
1991 		dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1992 					   asus->debug.root, node,
1993 					   &asus_wmi_debugfs_io_ops);
1994 		if (!dent) {
1995 			pr_err("failed to create debug file: %s\n", node->name);
1996 			goto error_debugfs;
1997 		}
1998 	}
1999 
2000 	return 0;
2001 
2002 error_debugfs:
2003 	asus_wmi_debugfs_exit(asus);
2004 	return -ENOMEM;
2005 }
2006 
2007 static int asus_wmi_fan_init(struct asus_wmi *asus)
2008 {
2009 	int status;
2010 
2011 	asus->asus_hwmon_pwm = -1;
2012 	asus->asus_hwmon_num_fans = -1;
2013 	asus->asus_hwmon_fan_manual_mode = false;
2014 
2015 	status = asus_hwmon_get_fan_number(asus, &asus->asus_hwmon_num_fans);
2016 	if (status) {
2017 		asus->asus_hwmon_num_fans = 0;
2018 		pr_warn("Could not determine number of fans: %d\n", status);
2019 		return -ENXIO;
2020 	}
2021 
2022 	pr_info("Number of fans: %d\n", asus->asus_hwmon_num_fans);
2023 	return 0;
2024 }
2025 
2026 /*
2027  * WMI Driver
2028  */
2029 static int asus_wmi_add(struct platform_device *pdev)
2030 {
2031 	struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2032 	struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2033 	struct asus_wmi *asus;
2034 	const char *chassis_type;
2035 	acpi_status status;
2036 	int err;
2037 	u32 result;
2038 
2039 	asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
2040 	if (!asus)
2041 		return -ENOMEM;
2042 
2043 	asus->driver = wdrv;
2044 	asus->platform_device = pdev;
2045 	wdrv->platform_device = pdev;
2046 	platform_set_drvdata(asus->platform_device, asus);
2047 
2048 	if (wdrv->detect_quirks)
2049 		wdrv->detect_quirks(asus->driver);
2050 
2051 	err = asus_wmi_platform_init(asus);
2052 	if (err)
2053 		goto fail_platform;
2054 
2055 	err = asus_wmi_input_init(asus);
2056 	if (err)
2057 		goto fail_input;
2058 
2059 	err = asus_wmi_fan_init(asus); /* probably no problems on error */
2060 	asus_hwmon_fan_set_auto(asus);
2061 
2062 	err = asus_wmi_hwmon_init(asus);
2063 	if (err)
2064 		goto fail_hwmon;
2065 
2066 	err = asus_wmi_led_init(asus);
2067 	if (err)
2068 		goto fail_leds;
2069 
2070 	err = asus_wmi_rfkill_init(asus);
2071 	if (err)
2072 		goto fail_rfkill;
2073 
2074 	/* Some Asus desktop boards export an acpi-video backlight interface,
2075 	   stop this from showing up */
2076 	chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
2077 	if (chassis_type && !strcmp(chassis_type, "3"))
2078 		acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2079 
2080 	if (asus->driver->quirks->wmi_backlight_power)
2081 		acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2082 
2083 	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
2084 		err = asus_wmi_backlight_init(asus);
2085 		if (err && err != -ENODEV)
2086 			goto fail_backlight;
2087 	}
2088 
2089 	status = wmi_install_notify_handler(asus->driver->event_guid,
2090 					    asus_wmi_notify, asus);
2091 	if (ACPI_FAILURE(status)) {
2092 		pr_err("Unable to register notify handler - %d\n", status);
2093 		err = -ENODEV;
2094 		goto fail_wmi_handler;
2095 	}
2096 
2097 	err = asus_wmi_debugfs_init(asus);
2098 	if (err)
2099 		goto fail_debugfs;
2100 
2101 	asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
2102 	if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
2103 		asus->driver->wlan_ctrl_by_user = 1;
2104 
2105 	return 0;
2106 
2107 fail_debugfs:
2108 	wmi_remove_notify_handler(asus->driver->event_guid);
2109 fail_wmi_handler:
2110 	asus_wmi_backlight_exit(asus);
2111 fail_backlight:
2112 	asus_wmi_rfkill_exit(asus);
2113 fail_rfkill:
2114 	asus_wmi_led_exit(asus);
2115 fail_leds:
2116 fail_hwmon:
2117 	asus_wmi_input_exit(asus);
2118 fail_input:
2119 	asus_wmi_platform_exit(asus);
2120 fail_platform:
2121 	kfree(asus);
2122 	return err;
2123 }
2124 
2125 static int asus_wmi_remove(struct platform_device *device)
2126 {
2127 	struct asus_wmi *asus;
2128 
2129 	asus = platform_get_drvdata(device);
2130 	wmi_remove_notify_handler(asus->driver->event_guid);
2131 	asus_wmi_backlight_exit(asus);
2132 	asus_wmi_input_exit(asus);
2133 	asus_wmi_led_exit(asus);
2134 	asus_wmi_rfkill_exit(asus);
2135 	asus_wmi_debugfs_exit(asus);
2136 	asus_wmi_platform_exit(asus);
2137 	asus_hwmon_fan_set_auto(asus);
2138 
2139 	kfree(asus);
2140 	return 0;
2141 }
2142 
2143 /*
2144  * Platform driver - hibernate/resume callbacks
2145  */
2146 static int asus_hotk_thaw(struct device *device)
2147 {
2148 	struct asus_wmi *asus = dev_get_drvdata(device);
2149 
2150 	if (asus->wlan.rfkill) {
2151 		bool wlan;
2152 
2153 		/*
2154 		 * Work around bios bug - acpi _PTS turns off the wireless led
2155 		 * during suspend.  Normally it restores it on resume, but
2156 		 * we should kick it ourselves in case hibernation is aborted.
2157 		 */
2158 		wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
2159 		asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
2160 	}
2161 
2162 	return 0;
2163 }
2164 
2165 static int asus_hotk_resume(struct device *device)
2166 {
2167 	struct asus_wmi *asus = dev_get_drvdata(device);
2168 
2169 	if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2170 		queue_work(asus->led_workqueue, &asus->kbd_led_work);
2171 
2172 	return 0;
2173 }
2174 
2175 static int asus_hotk_restore(struct device *device)
2176 {
2177 	struct asus_wmi *asus = dev_get_drvdata(device);
2178 	int bl;
2179 
2180 	/* Refresh both wlan rfkill state and pci hotplug */
2181 	if (asus->wlan.rfkill)
2182 		asus_rfkill_hotplug(asus);
2183 
2184 	if (asus->bluetooth.rfkill) {
2185 		bl = !asus_wmi_get_devstate_simple(asus,
2186 						   ASUS_WMI_DEVID_BLUETOOTH);
2187 		rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
2188 	}
2189 	if (asus->wimax.rfkill) {
2190 		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
2191 		rfkill_set_sw_state(asus->wimax.rfkill, bl);
2192 	}
2193 	if (asus->wwan3g.rfkill) {
2194 		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
2195 		rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
2196 	}
2197 	if (asus->gps.rfkill) {
2198 		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
2199 		rfkill_set_sw_state(asus->gps.rfkill, bl);
2200 	}
2201 	if (asus->uwb.rfkill) {
2202 		bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
2203 		rfkill_set_sw_state(asus->uwb.rfkill, bl);
2204 	}
2205 	if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
2206 		queue_work(asus->led_workqueue, &asus->kbd_led_work);
2207 
2208 	return 0;
2209 }
2210 
2211 static const struct dev_pm_ops asus_pm_ops = {
2212 	.thaw = asus_hotk_thaw,
2213 	.restore = asus_hotk_restore,
2214 	.resume = asus_hotk_resume,
2215 };
2216 
2217 static int asus_wmi_probe(struct platform_device *pdev)
2218 {
2219 	struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
2220 	struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
2221 	int ret;
2222 
2223 	if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
2224 		pr_warn("Management GUID not found\n");
2225 		return -ENODEV;
2226 	}
2227 
2228 	if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
2229 		pr_warn("Event GUID not found\n");
2230 		return -ENODEV;
2231 	}
2232 
2233 	if (wdrv->probe) {
2234 		ret = wdrv->probe(pdev);
2235 		if (ret)
2236 			return ret;
2237 	}
2238 
2239 	return asus_wmi_add(pdev);
2240 }
2241 
2242 static bool used;
2243 
2244 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
2245 {
2246 	struct platform_driver *platform_driver;
2247 	struct platform_device *platform_device;
2248 
2249 	if (used)
2250 		return -EBUSY;
2251 
2252 	platform_driver = &driver->platform_driver;
2253 	platform_driver->remove = asus_wmi_remove;
2254 	platform_driver->driver.owner = driver->owner;
2255 	platform_driver->driver.name = driver->name;
2256 	platform_driver->driver.pm = &asus_pm_ops;
2257 
2258 	platform_device = platform_create_bundle(platform_driver,
2259 						 asus_wmi_probe,
2260 						 NULL, 0, NULL, 0);
2261 	if (IS_ERR(platform_device))
2262 		return PTR_ERR(platform_device);
2263 
2264 	used = true;
2265 	return 0;
2266 }
2267 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
2268 
2269 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
2270 {
2271 	platform_device_unregister(driver->platform_device);
2272 	platform_driver_unregister(&driver->platform_driver);
2273 	used = false;
2274 }
2275 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
2276 
2277 static int __init asus_wmi_init(void)
2278 {
2279 	if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
2280 		pr_info("Asus Management GUID not found\n");
2281 		return -ENODEV;
2282 	}
2283 
2284 	pr_info("ASUS WMI generic driver loaded\n");
2285 	return 0;
2286 }
2287 
2288 static void __exit asus_wmi_exit(void)
2289 {
2290 	pr_info("ASUS WMI generic driver unloaded\n");
2291 }
2292 
2293 module_init(asus_wmi_init);
2294 module_exit(asus_wmi_exit);
2295