1 /*
2  *  asus-laptop.c - Asus Laptop Support
3  *
4  *
5  *  Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
6  *  Copyright (C) 2006-2007 Corentin Chary
7  *  Copyright (C) 2011 Wind River Systems
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or
12  *  (at your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful,
15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22  *
23  *
24  *  The development page for this driver is located at
25  *  http://sourceforge.net/projects/acpi4asus/
26  *
27  *  Credits:
28  *  Pontus Fuchs   - Helper functions, cleanup
29  *  Johann Wiesner - Small compile fixes
30  *  John Belmonte  - ACPI code for Toshiba laptop was a good starting point.
31  *  Eric Burghard  - LED display support for W1N
32  *  Josh Green     - Light Sens support
33  *  Thomas Tuttle  - His first patch for led support was very helpful
34  *  Sam Lin        - GPS support
35  */
36 
37 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
38 
39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/init.h>
42 #include <linux/types.h>
43 #include <linux/err.h>
44 #include <linux/proc_fs.h>
45 #include <linux/backlight.h>
46 #include <linux/fb.h>
47 #include <linux/leds.h>
48 #include <linux/platform_device.h>
49 #include <linux/uaccess.h>
50 #include <linux/input.h>
51 #include <linux/input/sparse-keymap.h>
52 #include <linux/input-polldev.h>
53 #include <linux/rfkill.h>
54 #include <linux/slab.h>
55 #include <linux/dmi.h>
56 #include <linux/acpi.h>
57 #include <acpi/video.h>
58 
59 #define ASUS_LAPTOP_VERSION	"0.42"
60 
61 #define ASUS_LAPTOP_NAME	"Asus Laptop Support"
62 #define ASUS_LAPTOP_CLASS	"hotkey"
63 #define ASUS_LAPTOP_DEVICE_NAME	"Hotkey"
64 #define ASUS_LAPTOP_FILE	KBUILD_MODNAME
65 #define ASUS_LAPTOP_PREFIX	"\\_SB.ATKD."
66 
67 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
68 MODULE_DESCRIPTION(ASUS_LAPTOP_NAME);
69 MODULE_LICENSE("GPL");
70 
71 /*
72  * WAPF defines the behavior of the Fn+Fx wlan key
73  * The significance of values is yet to be found, but
74  * most of the time:
75  * Bit | Bluetooth | WLAN
76  *  0  | Hardware  | Hardware
77  *  1  | Hardware  | Software
78  *  4  | Software  | Software
79  */
80 static uint wapf = 1;
81 module_param(wapf, uint, 0444);
82 MODULE_PARM_DESC(wapf, "WAPF value");
83 
84 static char *wled_type = "unknown";
85 static char *bled_type = "unknown";
86 
87 module_param(wled_type, charp, 0444);
88 MODULE_PARM_DESC(wled_type, "Set the wled type on boot "
89 		 "(unknown, led or rfkill). "
90 		 "default is unknown");
91 
92 module_param(bled_type, charp, 0444);
93 MODULE_PARM_DESC(bled_type, "Set the bled type on boot "
94 		 "(unknown, led or rfkill). "
95 		 "default is unknown");
96 
97 static int wlan_status = 1;
98 static int bluetooth_status = 1;
99 static int wimax_status = -1;
100 static int wwan_status = -1;
101 static int als_status;
102 
103 module_param(wlan_status, int, 0444);
104 MODULE_PARM_DESC(wlan_status, "Set the wireless status on boot "
105 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
106 		 "default is -1");
107 
108 module_param(bluetooth_status, int, 0444);
109 MODULE_PARM_DESC(bluetooth_status, "Set the wireless status on boot "
110 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
111 		 "default is -1");
112 
113 module_param(wimax_status, int, 0444);
114 MODULE_PARM_DESC(wimax_status, "Set the wireless status on boot "
115 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
116 		 "default is -1");
117 
118 module_param(wwan_status, int, 0444);
119 MODULE_PARM_DESC(wwan_status, "Set the wireless status on boot "
120 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
121 		 "default is -1");
122 
123 module_param(als_status, int, 0444);
124 MODULE_PARM_DESC(als_status, "Set the ALS status on boot "
125 		 "(0 = disabled, 1 = enabled). "
126 		 "default is 0");
127 
128 /*
129  * Some events we use, same for all Asus
130  */
131 #define ATKD_BRNUP_MIN		0x10
132 #define ATKD_BRNUP_MAX		0x1f
133 #define ATKD_BRNDOWN_MIN	0x20
134 #define ATKD_BRNDOWN_MAX	0x2f
135 #define ATKD_BRNDOWN		0x20
136 #define ATKD_BRNUP		0x2f
137 #define ATKD_LCD_ON	0x33
138 #define ATKD_LCD_OFF	0x34
139 
140 /*
141  * Known bits returned by \_SB.ATKD.HWRS
142  */
143 #define WL_HWRS		0x80
144 #define BT_HWRS		0x100
145 
146 /*
147  * Flags for hotk status
148  * WL_ON and BT_ON are also used for wireless_status()
149  */
150 #define WL_RSTS		0x01	/* internal Wifi */
151 #define BT_RSTS		0x02	/* internal Bluetooth */
152 #define WM_RSTS		0x08    /* internal wimax */
153 #define WW_RSTS		0x20    /* internal wwan */
154 
155 /* WLED and BLED type */
156 #define TYPE_UNKNOWN	0
157 #define TYPE_LED	1
158 #define TYPE_RFKILL	2
159 
160 /* LED */
161 #define METHOD_MLED		"MLED"
162 #define METHOD_TLED		"TLED"
163 #define METHOD_RLED		"RLED"	/* W1JC */
164 #define METHOD_PLED		"PLED"	/* A7J */
165 #define METHOD_GLED		"GLED"	/* G1, G2 (probably) */
166 
167 /* LEDD */
168 #define METHOD_LEDD		"SLCM"
169 
170 /*
171  * Bluetooth and WLAN
172  * WLED and BLED are not handled like other XLED, because in some dsdt
173  * they also control the WLAN/Bluetooth device.
174  */
175 #define METHOD_WLAN		"WLED"
176 #define METHOD_BLUETOOTH	"BLED"
177 
178 /* WWAN and WIMAX */
179 #define METHOD_WWAN		"GSMC"
180 #define METHOD_WIMAX		"WMXC"
181 
182 #define METHOD_WL_STATUS	"RSTS"
183 
184 /* Brightness */
185 #define METHOD_BRIGHTNESS_SET	"SPLV"
186 #define METHOD_BRIGHTNESS_GET	"GPLV"
187 
188 /* Display */
189 #define METHOD_SWITCH_DISPLAY	"SDSP"
190 
191 #define METHOD_ALS_CONTROL	"ALSC" /* Z71A Z71V */
192 #define METHOD_ALS_LEVEL	"ALSL" /* Z71A Z71V */
193 
194 /* GPS */
195 /* R2H use different handle for GPS on/off */
196 #define METHOD_GPS_ON		"SDON"
197 #define METHOD_GPS_OFF		"SDOF"
198 #define METHOD_GPS_STATUS	"GPST"
199 
200 /* Keyboard light */
201 #define METHOD_KBD_LIGHT_SET	"SLKB"
202 #define METHOD_KBD_LIGHT_GET	"GLKB"
203 
204 /* For Pegatron Lucid tablet */
205 #define DEVICE_NAME_PEGA	"Lucid"
206 
207 #define METHOD_PEGA_ENABLE	"ENPR"
208 #define METHOD_PEGA_DISABLE	"DAPR"
209 #define PEGA_WLAN	0x00
210 #define PEGA_BLUETOOTH	0x01
211 #define PEGA_WWAN	0x02
212 #define PEGA_ALS	0x04
213 #define PEGA_ALS_POWER	0x05
214 
215 #define METHOD_PEGA_READ	"RDLN"
216 #define PEGA_READ_ALS_H	0x02
217 #define PEGA_READ_ALS_L	0x03
218 
219 #define PEGA_ACCEL_NAME "pega_accel"
220 #define PEGA_ACCEL_DESC "Pegatron Lucid Tablet Accelerometer"
221 #define METHOD_XLRX "XLRX"
222 #define METHOD_XLRY "XLRY"
223 #define METHOD_XLRZ "XLRZ"
224 #define PEGA_ACC_CLAMP 512 /* 1G accel is reported as ~256, so clamp to 2G */
225 #define PEGA_ACC_RETRIES 3
226 
227 /*
228  * Define a specific led structure to keep the main structure clean
229  */
230 struct asus_led {
231 	int wk;
232 	struct work_struct work;
233 	struct led_classdev led;
234 	struct asus_laptop *asus;
235 	const char *method;
236 };
237 
238 /*
239  * Same thing for rfkill
240  */
241 struct asus_rfkill {
242 	/* type of control. Maps to PEGA_* values or *_RSTS  */
243 	int control_id;
244 	struct rfkill *rfkill;
245 	struct asus_laptop *asus;
246 };
247 
248 /*
249  * This is the main structure, we can use it to store anything interesting
250  * about the hotk device
251  */
252 struct asus_laptop {
253 	char *name;		/* laptop name */
254 
255 	struct acpi_table_header *dsdt_info;
256 	struct platform_device *platform_device;
257 	struct acpi_device *device;		/* the device we are in */
258 	struct backlight_device *backlight_device;
259 
260 	struct input_dev *inputdev;
261 	struct key_entry *keymap;
262 	struct input_polled_dev *pega_accel_poll;
263 
264 	struct asus_led wled;
265 	struct asus_led bled;
266 	struct asus_led mled;
267 	struct asus_led tled;
268 	struct asus_led rled;
269 	struct asus_led pled;
270 	struct asus_led gled;
271 	struct asus_led kled;
272 	struct workqueue_struct *led_workqueue;
273 
274 	int wled_type;
275 	int bled_type;
276 	int wireless_status;
277 	bool have_rsts;
278 	bool is_pega_lucid;
279 	bool pega_acc_live;
280 	int pega_acc_x;
281 	int pega_acc_y;
282 	int pega_acc_z;
283 
284 	struct asus_rfkill wlan;
285 	struct asus_rfkill bluetooth;
286 	struct asus_rfkill wwan;
287 	struct asus_rfkill wimax;
288 	struct asus_rfkill gps;
289 
290 	acpi_handle handle;	/* the handle of the hotk device */
291 	u32 ledd_status;	/* status of the LED display */
292 	u8 light_level;		/* light sensor level */
293 	u8 light_switch;	/* light sensor switch value */
294 	u16 event_count[128];	/* count for each event TODO make this better */
295 };
296 
297 static const struct key_entry asus_keymap[] = {
298 	/* Lenovo SL Specific keycodes */
299 	{KE_KEY, 0x02, { KEY_SCREENLOCK } },
300 	{KE_KEY, 0x05, { KEY_WLAN } },
301 	{KE_KEY, 0x08, { KEY_F13 } },
302 	{KE_KEY, 0x09, { KEY_PROG2 } }, /* Dock */
303 	{KE_KEY, 0x17, { KEY_ZOOM } },
304 	{KE_KEY, 0x1f, { KEY_BATTERY } },
305 	/* End of Lenovo SL Specific keycodes */
306 	{KE_KEY, ATKD_BRNDOWN, { KEY_BRIGHTNESSDOWN } },
307 	{KE_KEY, ATKD_BRNUP, { KEY_BRIGHTNESSUP } },
308 	{KE_KEY, 0x30, { KEY_VOLUMEUP } },
309 	{KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
310 	{KE_KEY, 0x32, { KEY_MUTE } },
311 	{KE_KEY, 0x33, { KEY_DISPLAYTOGGLE } }, /* LCD on */
312 	{KE_KEY, 0x34, { KEY_DISPLAY_OFF } }, /* LCD off */
313 	{KE_KEY, 0x40, { KEY_PREVIOUSSONG } },
314 	{KE_KEY, 0x41, { KEY_NEXTSONG } },
315 	{KE_KEY, 0x43, { KEY_STOPCD } }, /* Stop/Eject */
316 	{KE_KEY, 0x45, { KEY_PLAYPAUSE } },
317 	{KE_KEY, 0x4c, { KEY_MEDIA } }, /* WMP Key */
318 	{KE_KEY, 0x50, { KEY_EMAIL } },
319 	{KE_KEY, 0x51, { KEY_WWW } },
320 	{KE_KEY, 0x55, { KEY_CALC } },
321 	{KE_IGNORE, 0x57, },  /* Battery mode */
322 	{KE_IGNORE, 0x58, },  /* AC mode */
323 	{KE_KEY, 0x5C, { KEY_SCREENLOCK } },  /* Screenlock */
324 	{KE_KEY, 0x5D, { KEY_WLAN } }, /* WLAN Toggle */
325 	{KE_KEY, 0x5E, { KEY_WLAN } }, /* WLAN Enable */
326 	{KE_KEY, 0x5F, { KEY_WLAN } }, /* WLAN Disable */
327 	{KE_KEY, 0x60, { KEY_TOUCHPAD_ON } },
328 	{KE_KEY, 0x61, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD only */
329 	{KE_KEY, 0x62, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT only */
330 	{KE_KEY, 0x63, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT */
331 	{KE_KEY, 0x64, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV */
332 	{KE_KEY, 0x65, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV */
333 	{KE_KEY, 0x66, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV */
334 	{KE_KEY, 0x67, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV */
335 	{KE_KEY, 0x6A, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad Fn + F9 */
336 	{KE_KEY, 0x6B, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad */
337 	{KE_KEY, 0x6C, { KEY_SLEEP } }, /* Suspend */
338 	{KE_KEY, 0x6D, { KEY_SLEEP } }, /* Hibernate */
339 	{KE_IGNORE, 0x6E, },  /* Low Battery notification */
340 	{KE_KEY, 0x7D, { KEY_BLUETOOTH } }, /* Bluetooth Enable */
341 	{KE_KEY, 0x7E, { KEY_BLUETOOTH } }, /* Bluetooth Disable */
342 	{KE_KEY, 0x82, { KEY_CAMERA } },
343 	{KE_KEY, 0x88, { KEY_RFKILL  } }, /* Radio Toggle Key */
344 	{KE_KEY, 0x8A, { KEY_PROG1 } }, /* Color enhancement mode */
345 	{KE_KEY, 0x8C, { KEY_SWITCHVIDEOMODE } }, /* SDSP DVI only */
346 	{KE_KEY, 0x8D, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + DVI */
347 	{KE_KEY, 0x8E, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + DVI */
348 	{KE_KEY, 0x8F, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + DVI */
349 	{KE_KEY, 0x90, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + DVI */
350 	{KE_KEY, 0x91, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + DVI */
351 	{KE_KEY, 0x92, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + DVI */
352 	{KE_KEY, 0x93, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + DVI */
353 	{KE_KEY, 0x95, { KEY_MEDIA } },
354 	{KE_KEY, 0x99, { KEY_PHONE } },
355 	{KE_KEY, 0xA0, { KEY_SWITCHVIDEOMODE } }, /* SDSP HDMI only */
356 	{KE_KEY, 0xA1, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + HDMI */
357 	{KE_KEY, 0xA2, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + HDMI */
358 	{KE_KEY, 0xA3, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + HDMI */
359 	{KE_KEY, 0xA4, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + HDMI */
360 	{KE_KEY, 0xA5, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + HDMI */
361 	{KE_KEY, 0xA6, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + HDMI */
362 	{KE_KEY, 0xA7, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + HDMI */
363 	{KE_KEY, 0xB5, { KEY_CALC } },
364 	{KE_KEY, 0xC4, { KEY_KBDILLUMUP } },
365 	{KE_KEY, 0xC5, { KEY_KBDILLUMDOWN } },
366 	{KE_END, 0},
367 };
368 
369 
370 /*
371  * This function evaluates an ACPI method, given an int as parameter, the
372  * method is searched within the scope of the handle, can be NULL. The output
373  * of the method is written is output, which can also be NULL
374  *
375  * returns 0 if write is successful, -1 else.
376  */
377 static int write_acpi_int_ret(acpi_handle handle, const char *method, int val,
378 			      struct acpi_buffer *output)
379 {
380 	struct acpi_object_list params;	/* list of input parameters (an int) */
381 	union acpi_object in_obj;	/* the only param we use */
382 	acpi_status status;
383 
384 	if (!handle)
385 		return -1;
386 
387 	params.count = 1;
388 	params.pointer = &in_obj;
389 	in_obj.type = ACPI_TYPE_INTEGER;
390 	in_obj.integer.value = val;
391 
392 	status = acpi_evaluate_object(handle, (char *)method, &params, output);
393 	if (status == AE_OK)
394 		return 0;
395 	else
396 		return -1;
397 }
398 
399 static int write_acpi_int(acpi_handle handle, const char *method, int val)
400 {
401 	return write_acpi_int_ret(handle, method, val, NULL);
402 }
403 
404 static int acpi_check_handle(acpi_handle handle, const char *method,
405 			     acpi_handle *ret)
406 {
407 	acpi_status status;
408 
409 	if (method == NULL)
410 		return -ENODEV;
411 
412 	if (ret)
413 		status = acpi_get_handle(handle, (char *)method,
414 					 ret);
415 	else {
416 		acpi_handle dummy;
417 
418 		status = acpi_get_handle(handle, (char *)method,
419 					 &dummy);
420 	}
421 
422 	if (status != AE_OK) {
423 		if (ret)
424 			pr_warn("Error finding %s\n", method);
425 		return -ENODEV;
426 	}
427 	return 0;
428 }
429 
430 static bool asus_check_pega_lucid(struct asus_laptop *asus)
431 {
432 	return !strcmp(asus->name, DEVICE_NAME_PEGA) &&
433 	   !acpi_check_handle(asus->handle, METHOD_PEGA_ENABLE, NULL) &&
434 	   !acpi_check_handle(asus->handle, METHOD_PEGA_DISABLE, NULL) &&
435 	   !acpi_check_handle(asus->handle, METHOD_PEGA_READ, NULL);
436 }
437 
438 static int asus_pega_lucid_set(struct asus_laptop *asus, int unit, bool enable)
439 {
440 	char *method = enable ? METHOD_PEGA_ENABLE : METHOD_PEGA_DISABLE;
441 	return write_acpi_int(asus->handle, method, unit);
442 }
443 
444 static int pega_acc_axis(struct asus_laptop *asus, int curr, char *method)
445 {
446 	int i, delta;
447 	unsigned long long val;
448 	for (i = 0; i < PEGA_ACC_RETRIES; i++) {
449 		acpi_evaluate_integer(asus->handle, method, NULL, &val);
450 
451 		/* The output is noisy.  From reading the ASL
452 		 * dissassembly, timeout errors are returned with 1's
453 		 * in the high word, and the lack of locking around
454 		 * thei hi/lo byte reads means that a transition
455 		 * between (for example) -1 and 0 could be read as
456 		 * 0xff00 or 0x00ff. */
457 		delta = abs(curr - (short)val);
458 		if (delta < 128 && !(val & ~0xffff))
459 			break;
460 	}
461 	return clamp_val((short)val, -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP);
462 }
463 
464 static void pega_accel_poll(struct input_polled_dev *ipd)
465 {
466 	struct device *parent = ipd->input->dev.parent;
467 	struct asus_laptop *asus = dev_get_drvdata(parent);
468 
469 	/* In some cases, the very first call to poll causes a
470 	 * recursive fault under the polldev worker.  This is
471 	 * apparently related to very early userspace access to the
472 	 * device, and perhaps a firmware bug. Fake the first report. */
473 	if (!asus->pega_acc_live) {
474 		asus->pega_acc_live = true;
475 		input_report_abs(ipd->input, ABS_X, 0);
476 		input_report_abs(ipd->input, ABS_Y, 0);
477 		input_report_abs(ipd->input, ABS_Z, 0);
478 		input_sync(ipd->input);
479 		return;
480 	}
481 
482 	asus->pega_acc_x = pega_acc_axis(asus, asus->pega_acc_x, METHOD_XLRX);
483 	asus->pega_acc_y = pega_acc_axis(asus, asus->pega_acc_y, METHOD_XLRY);
484 	asus->pega_acc_z = pega_acc_axis(asus, asus->pega_acc_z, METHOD_XLRZ);
485 
486 	/* Note transform, convert to "right/up/out" in the native
487 	 * landscape orientation (i.e. the vector is the direction of
488 	 * "real up" in the device's cartiesian coordinates). */
489 	input_report_abs(ipd->input, ABS_X, -asus->pega_acc_x);
490 	input_report_abs(ipd->input, ABS_Y, -asus->pega_acc_y);
491 	input_report_abs(ipd->input, ABS_Z,  asus->pega_acc_z);
492 	input_sync(ipd->input);
493 }
494 
495 static void pega_accel_exit(struct asus_laptop *asus)
496 {
497 	if (asus->pega_accel_poll) {
498 		input_unregister_polled_device(asus->pega_accel_poll);
499 		input_free_polled_device(asus->pega_accel_poll);
500 	}
501 	asus->pega_accel_poll = NULL;
502 }
503 
504 static int pega_accel_init(struct asus_laptop *asus)
505 {
506 	int err;
507 	struct input_polled_dev *ipd;
508 
509 	if (!asus->is_pega_lucid)
510 		return -ENODEV;
511 
512 	if (acpi_check_handle(asus->handle, METHOD_XLRX, NULL) ||
513 	    acpi_check_handle(asus->handle, METHOD_XLRY, NULL) ||
514 	    acpi_check_handle(asus->handle, METHOD_XLRZ, NULL))
515 		return -ENODEV;
516 
517 	ipd = input_allocate_polled_device();
518 	if (!ipd)
519 		return -ENOMEM;
520 
521 	ipd->poll = pega_accel_poll;
522 	ipd->poll_interval = 125;
523 	ipd->poll_interval_min = 50;
524 	ipd->poll_interval_max = 2000;
525 
526 	ipd->input->name = PEGA_ACCEL_DESC;
527 	ipd->input->phys = PEGA_ACCEL_NAME "/input0";
528 	ipd->input->dev.parent = &asus->platform_device->dev;
529 	ipd->input->id.bustype = BUS_HOST;
530 
531 	set_bit(EV_ABS, ipd->input->evbit);
532 	input_set_abs_params(ipd->input, ABS_X,
533 			     -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
534 	input_set_abs_params(ipd->input, ABS_Y,
535 			     -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
536 	input_set_abs_params(ipd->input, ABS_Z,
537 			     -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
538 
539 	err = input_register_polled_device(ipd);
540 	if (err)
541 		goto exit;
542 
543 	asus->pega_accel_poll = ipd;
544 	return 0;
545 
546 exit:
547 	input_free_polled_device(ipd);
548 	return err;
549 }
550 
551 /* Generic LED function */
552 static int asus_led_set(struct asus_laptop *asus, const char *method,
553 			 int value)
554 {
555 	if (!strcmp(method, METHOD_MLED))
556 		value = !value;
557 	else if (!strcmp(method, METHOD_GLED))
558 		value = !value + 1;
559 	else
560 		value = !!value;
561 
562 	return write_acpi_int(asus->handle, method, value);
563 }
564 
565 /*
566  * LEDs
567  */
568 /* /sys/class/led handlers */
569 static void asus_led_cdev_set(struct led_classdev *led_cdev,
570 			 enum led_brightness value)
571 {
572 	struct asus_led *led = container_of(led_cdev, struct asus_led, led);
573 	struct asus_laptop *asus = led->asus;
574 
575 	led->wk = !!value;
576 	queue_work(asus->led_workqueue, &led->work);
577 }
578 
579 static void asus_led_cdev_update(struct work_struct *work)
580 {
581 	struct asus_led *led = container_of(work, struct asus_led, work);
582 	struct asus_laptop *asus = led->asus;
583 
584 	asus_led_set(asus, led->method, led->wk);
585 }
586 
587 static enum led_brightness asus_led_cdev_get(struct led_classdev *led_cdev)
588 {
589 	return led_cdev->brightness;
590 }
591 
592 /*
593  * Keyboard backlight (also a LED)
594  */
595 static int asus_kled_lvl(struct asus_laptop *asus)
596 {
597 	unsigned long long kblv;
598 	struct acpi_object_list params;
599 	union acpi_object in_obj;
600 	acpi_status rv;
601 
602 	params.count = 1;
603 	params.pointer = &in_obj;
604 	in_obj.type = ACPI_TYPE_INTEGER;
605 	in_obj.integer.value = 2;
606 
607 	rv = acpi_evaluate_integer(asus->handle, METHOD_KBD_LIGHT_GET,
608 				   &params, &kblv);
609 	if (ACPI_FAILURE(rv)) {
610 		pr_warn("Error reading kled level\n");
611 		return -ENODEV;
612 	}
613 	return kblv;
614 }
615 
616 static int asus_kled_set(struct asus_laptop *asus, int kblv)
617 {
618 	if (kblv > 0)
619 		kblv = (1 << 7) | (kblv & 0x7F);
620 	else
621 		kblv = 0;
622 
623 	if (write_acpi_int(asus->handle, METHOD_KBD_LIGHT_SET, kblv)) {
624 		pr_warn("Keyboard LED display write failed\n");
625 		return -EINVAL;
626 	}
627 	return 0;
628 }
629 
630 static void asus_kled_cdev_set(struct led_classdev *led_cdev,
631 			      enum led_brightness value)
632 {
633 	struct asus_led *led = container_of(led_cdev, struct asus_led, led);
634 	struct asus_laptop *asus = led->asus;
635 
636 	led->wk = value;
637 	queue_work(asus->led_workqueue, &led->work);
638 }
639 
640 static void asus_kled_cdev_update(struct work_struct *work)
641 {
642 	struct asus_led *led = container_of(work, struct asus_led, work);
643 	struct asus_laptop *asus = led->asus;
644 
645 	asus_kled_set(asus, led->wk);
646 }
647 
648 static enum led_brightness asus_kled_cdev_get(struct led_classdev *led_cdev)
649 {
650 	struct asus_led *led = container_of(led_cdev, struct asus_led, led);
651 	struct asus_laptop *asus = led->asus;
652 
653 	return asus_kled_lvl(asus);
654 }
655 
656 static void asus_led_exit(struct asus_laptop *asus)
657 {
658 	if (!IS_ERR_OR_NULL(asus->wled.led.dev))
659 		led_classdev_unregister(&asus->wled.led);
660 	if (!IS_ERR_OR_NULL(asus->bled.led.dev))
661 		led_classdev_unregister(&asus->bled.led);
662 	if (!IS_ERR_OR_NULL(asus->mled.led.dev))
663 		led_classdev_unregister(&asus->mled.led);
664 	if (!IS_ERR_OR_NULL(asus->tled.led.dev))
665 		led_classdev_unregister(&asus->tled.led);
666 	if (!IS_ERR_OR_NULL(asus->pled.led.dev))
667 		led_classdev_unregister(&asus->pled.led);
668 	if (!IS_ERR_OR_NULL(asus->rled.led.dev))
669 		led_classdev_unregister(&asus->rled.led);
670 	if (!IS_ERR_OR_NULL(asus->gled.led.dev))
671 		led_classdev_unregister(&asus->gled.led);
672 	if (!IS_ERR_OR_NULL(asus->kled.led.dev))
673 		led_classdev_unregister(&asus->kled.led);
674 	if (asus->led_workqueue) {
675 		destroy_workqueue(asus->led_workqueue);
676 		asus->led_workqueue = NULL;
677 	}
678 }
679 
680 /*  Ugly macro, need to fix that later */
681 static int asus_led_register(struct asus_laptop *asus,
682 			     struct asus_led *led,
683 			     const char *name, const char *method)
684 {
685 	struct led_classdev *led_cdev = &led->led;
686 
687 	if (!method || acpi_check_handle(asus->handle, method, NULL))
688 		return 0; /* Led not present */
689 
690 	led->asus = asus;
691 	led->method = method;
692 
693 	INIT_WORK(&led->work, asus_led_cdev_update);
694 	led_cdev->name = name;
695 	led_cdev->brightness_set = asus_led_cdev_set;
696 	led_cdev->brightness_get = asus_led_cdev_get;
697 	led_cdev->max_brightness = 1;
698 	return led_classdev_register(&asus->platform_device->dev, led_cdev);
699 }
700 
701 static int asus_led_init(struct asus_laptop *asus)
702 {
703 	int r = 0;
704 
705 	/*
706 	 * The Pegatron Lucid has no physical leds, but all methods are
707 	 * available in the DSDT...
708 	 */
709 	if (asus->is_pega_lucid)
710 		return 0;
711 
712 	/*
713 	 * Functions that actually update the LED's are called from a
714 	 * workqueue. By doing this as separate work rather than when the LED
715 	 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
716 	 * potentially bad time, such as a timer interrupt.
717 	 */
718 	asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
719 	if (!asus->led_workqueue)
720 		return -ENOMEM;
721 
722 	if (asus->wled_type == TYPE_LED)
723 		r = asus_led_register(asus, &asus->wled, "asus::wlan",
724 				      METHOD_WLAN);
725 	if (r)
726 		goto error;
727 	if (asus->bled_type == TYPE_LED)
728 		r = asus_led_register(asus, &asus->bled, "asus::bluetooth",
729 				      METHOD_BLUETOOTH);
730 	if (r)
731 		goto error;
732 	r = asus_led_register(asus, &asus->mled, "asus::mail", METHOD_MLED);
733 	if (r)
734 		goto error;
735 	r = asus_led_register(asus, &asus->tled, "asus::touchpad", METHOD_TLED);
736 	if (r)
737 		goto error;
738 	r = asus_led_register(asus, &asus->rled, "asus::record", METHOD_RLED);
739 	if (r)
740 		goto error;
741 	r = asus_led_register(asus, &asus->pled, "asus::phone", METHOD_PLED);
742 	if (r)
743 		goto error;
744 	r = asus_led_register(asus, &asus->gled, "asus::gaming", METHOD_GLED);
745 	if (r)
746 		goto error;
747 	if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL) &&
748 	    !acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_GET, NULL)) {
749 		struct asus_led *led = &asus->kled;
750 		struct led_classdev *cdev = &led->led;
751 
752 		led->asus = asus;
753 
754 		INIT_WORK(&led->work, asus_kled_cdev_update);
755 		cdev->name = "asus::kbd_backlight";
756 		cdev->brightness_set = asus_kled_cdev_set;
757 		cdev->brightness_get = asus_kled_cdev_get;
758 		cdev->max_brightness = 3;
759 		r = led_classdev_register(&asus->platform_device->dev, cdev);
760 	}
761 error:
762 	if (r)
763 		asus_led_exit(asus);
764 	return r;
765 }
766 
767 /*
768  * Backlight device
769  */
770 static int asus_read_brightness(struct backlight_device *bd)
771 {
772 	struct asus_laptop *asus = bl_get_data(bd);
773 	unsigned long long value;
774 	acpi_status rv;
775 
776 	rv = acpi_evaluate_integer(asus->handle, METHOD_BRIGHTNESS_GET,
777 				   NULL, &value);
778 	if (ACPI_FAILURE(rv)) {
779 		pr_warn("Error reading brightness\n");
780 		return 0;
781 	}
782 
783 	return value;
784 }
785 
786 static int asus_set_brightness(struct backlight_device *bd, int value)
787 {
788 	struct asus_laptop *asus = bl_get_data(bd);
789 
790 	if (write_acpi_int(asus->handle, METHOD_BRIGHTNESS_SET, value)) {
791 		pr_warn("Error changing brightness\n");
792 		return -EIO;
793 	}
794 	return 0;
795 }
796 
797 static int update_bl_status(struct backlight_device *bd)
798 {
799 	int value = bd->props.brightness;
800 
801 	return asus_set_brightness(bd, value);
802 }
803 
804 static const struct backlight_ops asusbl_ops = {
805 	.get_brightness = asus_read_brightness,
806 	.update_status = update_bl_status,
807 };
808 
809 static int asus_backlight_notify(struct asus_laptop *asus)
810 {
811 	struct backlight_device *bd = asus->backlight_device;
812 	int old = bd->props.brightness;
813 
814 	backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
815 
816 	return old;
817 }
818 
819 static int asus_backlight_init(struct asus_laptop *asus)
820 {
821 	struct backlight_device *bd;
822 	struct backlight_properties props;
823 
824 	if (acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_GET, NULL) ||
825 	    acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_SET, NULL))
826 		return 0;
827 
828 	memset(&props, 0, sizeof(struct backlight_properties));
829 	props.max_brightness = 15;
830 	props.type = BACKLIGHT_PLATFORM;
831 
832 	bd = backlight_device_register(ASUS_LAPTOP_FILE,
833 				       &asus->platform_device->dev, asus,
834 				       &asusbl_ops, &props);
835 	if (IS_ERR(bd)) {
836 		pr_err("Could not register asus backlight device\n");
837 		asus->backlight_device = NULL;
838 		return PTR_ERR(bd);
839 	}
840 
841 	asus->backlight_device = bd;
842 	bd->props.brightness = asus_read_brightness(bd);
843 	bd->props.power = FB_BLANK_UNBLANK;
844 	backlight_update_status(bd);
845 	return 0;
846 }
847 
848 static void asus_backlight_exit(struct asus_laptop *asus)
849 {
850 	backlight_device_unregister(asus->backlight_device);
851 	asus->backlight_device = NULL;
852 }
853 
854 /*
855  * Platform device handlers
856  */
857 
858 /*
859  * We write our info in page, we begin at offset off and cannot write more
860  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
861  * number of bytes written in page
862  */
863 static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
864 			  char *page)
865 {
866 	struct asus_laptop *asus = dev_get_drvdata(dev);
867 	int len = 0;
868 	unsigned long long temp;
869 	char buf[16];		/* enough for all info */
870 	acpi_status rv;
871 
872 	/*
873 	 * We use the easy way, we don't care of off and count,
874 	 * so we don't set eof to 1
875 	 */
876 
877 	len += sprintf(page, ASUS_LAPTOP_NAME " " ASUS_LAPTOP_VERSION "\n");
878 	len += sprintf(page + len, "Model reference    : %s\n", asus->name);
879 	/*
880 	 * The SFUN method probably allows the original driver to get the list
881 	 * of features supported by a given model. For now, 0x0100 or 0x0800
882 	 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
883 	 * The significance of others is yet to be found.
884 	 */
885 	rv = acpi_evaluate_integer(asus->handle, "SFUN", NULL, &temp);
886 	if (!ACPI_FAILURE(rv))
887 		len += sprintf(page + len, "SFUN value         : %#x\n",
888 			       (uint) temp);
889 	/*
890 	 * The HWRS method return informations about the hardware.
891 	 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
892 	 * 0x40 for WWAN, 0x10 for WIMAX.
893 	 * The significance of others is yet to be found.
894 	 * We don't currently use this for device detection, and it
895 	 * takes several seconds to run on some systems.
896 	 */
897 	rv = acpi_evaluate_integer(asus->handle, "HWRS", NULL, &temp);
898 	if (!ACPI_FAILURE(rv))
899 		len += sprintf(page + len, "HWRS value         : %#x\n",
900 			       (uint) temp);
901 	/*
902 	 * Another value for userspace: the ASYM method returns 0x02 for
903 	 * battery low and 0x04 for battery critical, its readings tend to be
904 	 * more accurate than those provided by _BST.
905 	 * Note: since not all the laptops provide this method, errors are
906 	 * silently ignored.
907 	 */
908 	rv = acpi_evaluate_integer(asus->handle, "ASYM", NULL, &temp);
909 	if (!ACPI_FAILURE(rv))
910 		len += sprintf(page + len, "ASYM value         : %#x\n",
911 			       (uint) temp);
912 	if (asus->dsdt_info) {
913 		snprintf(buf, 16, "%d", asus->dsdt_info->length);
914 		len += sprintf(page + len, "DSDT length        : %s\n", buf);
915 		snprintf(buf, 16, "%d", asus->dsdt_info->checksum);
916 		len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
917 		snprintf(buf, 16, "%d", asus->dsdt_info->revision);
918 		len += sprintf(page + len, "DSDT revision      : %s\n", buf);
919 		snprintf(buf, 7, "%s", asus->dsdt_info->oem_id);
920 		len += sprintf(page + len, "OEM id             : %s\n", buf);
921 		snprintf(buf, 9, "%s", asus->dsdt_info->oem_table_id);
922 		len += sprintf(page + len, "OEM table id       : %s\n", buf);
923 		snprintf(buf, 16, "%x", asus->dsdt_info->oem_revision);
924 		len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
925 		snprintf(buf, 5, "%s", asus->dsdt_info->asl_compiler_id);
926 		len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
927 		snprintf(buf, 16, "%x", asus->dsdt_info->asl_compiler_revision);
928 		len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
929 	}
930 
931 	return len;
932 }
933 static DEVICE_ATTR_RO(infos);
934 
935 static ssize_t sysfs_acpi_set(struct asus_laptop *asus,
936 			      const char *buf, size_t count,
937 			      const char *method)
938 {
939 	int rv, value;
940 
941 	rv = kstrtoint(buf, 0, &value);
942 	if (rv < 0)
943 		return rv;
944 
945 	if (write_acpi_int(asus->handle, method, value))
946 		return -ENODEV;
947 	return count;
948 }
949 
950 /*
951  * LEDD display
952  */
953 static ssize_t ledd_show(struct device *dev, struct device_attribute *attr,
954 			 char *buf)
955 {
956 	struct asus_laptop *asus = dev_get_drvdata(dev);
957 
958 	return sprintf(buf, "0x%08x\n", asus->ledd_status);
959 }
960 
961 static ssize_t ledd_store(struct device *dev, struct device_attribute *attr,
962 			  const char *buf, size_t count)
963 {
964 	struct asus_laptop *asus = dev_get_drvdata(dev);
965 	int rv, value;
966 
967 	rv = kstrtoint(buf, 0, &value);
968 	if (rv < 0)
969 		return rv;
970 
971 	if (write_acpi_int(asus->handle, METHOD_LEDD, value)) {
972 		pr_warn("LED display write failed\n");
973 		return -ENODEV;
974 	}
975 
976 	asus->ledd_status = (u32) value;
977 	return count;
978 }
979 static DEVICE_ATTR_RW(ledd);
980 
981 /*
982  * Wireless
983  */
984 static int asus_wireless_status(struct asus_laptop *asus, int mask)
985 {
986 	unsigned long long status;
987 	acpi_status rv = AE_OK;
988 
989 	if (!asus->have_rsts)
990 		return (asus->wireless_status & mask) ? 1 : 0;
991 
992 	rv = acpi_evaluate_integer(asus->handle, METHOD_WL_STATUS,
993 				   NULL, &status);
994 	if (ACPI_FAILURE(rv)) {
995 		pr_warn("Error reading Wireless status\n");
996 		return -EINVAL;
997 	}
998 	return !!(status & mask);
999 }
1000 
1001 /*
1002  * WLAN
1003  */
1004 static int asus_wlan_set(struct asus_laptop *asus, int status)
1005 {
1006 	if (write_acpi_int(asus->handle, METHOD_WLAN, !!status)) {
1007 		pr_warn("Error setting wlan status to %d\n", status);
1008 		return -EIO;
1009 	}
1010 	return 0;
1011 }
1012 
1013 static ssize_t wlan_show(struct device *dev, struct device_attribute *attr,
1014 			 char *buf)
1015 {
1016 	struct asus_laptop *asus = dev_get_drvdata(dev);
1017 
1018 	return sprintf(buf, "%d\n", asus_wireless_status(asus, WL_RSTS));
1019 }
1020 
1021 static ssize_t wlan_store(struct device *dev, struct device_attribute *attr,
1022 			  const char *buf, size_t count)
1023 {
1024 	struct asus_laptop *asus = dev_get_drvdata(dev);
1025 
1026 	return sysfs_acpi_set(asus, buf, count, METHOD_WLAN);
1027 }
1028 static DEVICE_ATTR_RW(wlan);
1029 
1030 /*e
1031  * Bluetooth
1032  */
1033 static int asus_bluetooth_set(struct asus_laptop *asus, int status)
1034 {
1035 	if (write_acpi_int(asus->handle, METHOD_BLUETOOTH, !!status)) {
1036 		pr_warn("Error setting bluetooth status to %d\n", status);
1037 		return -EIO;
1038 	}
1039 	return 0;
1040 }
1041 
1042 static ssize_t bluetooth_show(struct device *dev, struct device_attribute *attr,
1043 			      char *buf)
1044 {
1045 	struct asus_laptop *asus = dev_get_drvdata(dev);
1046 
1047 	return sprintf(buf, "%d\n", asus_wireless_status(asus, BT_RSTS));
1048 }
1049 
1050 static ssize_t bluetooth_store(struct device *dev,
1051 			       struct device_attribute *attr, const char *buf,
1052 			       size_t count)
1053 {
1054 	struct asus_laptop *asus = dev_get_drvdata(dev);
1055 
1056 	return sysfs_acpi_set(asus, buf, count, METHOD_BLUETOOTH);
1057 }
1058 static DEVICE_ATTR_RW(bluetooth);
1059 
1060 /*
1061  * Wimax
1062  */
1063 static int asus_wimax_set(struct asus_laptop *asus, int status)
1064 {
1065 	if (write_acpi_int(asus->handle, METHOD_WIMAX, !!status)) {
1066 		pr_warn("Error setting wimax status to %d\n", status);
1067 		return -EIO;
1068 	}
1069 	return 0;
1070 }
1071 
1072 static ssize_t wimax_show(struct device *dev, struct device_attribute *attr,
1073 			  char *buf)
1074 {
1075 	struct asus_laptop *asus = dev_get_drvdata(dev);
1076 
1077 	return sprintf(buf, "%d\n", asus_wireless_status(asus, WM_RSTS));
1078 }
1079 
1080 static ssize_t wimax_store(struct device *dev, struct device_attribute *attr,
1081 			   const char *buf, size_t count)
1082 {
1083 	struct asus_laptop *asus = dev_get_drvdata(dev);
1084 
1085 	return sysfs_acpi_set(asus, buf, count, METHOD_WIMAX);
1086 }
1087 static DEVICE_ATTR_RW(wimax);
1088 
1089 /*
1090  * Wwan
1091  */
1092 static int asus_wwan_set(struct asus_laptop *asus, int status)
1093 {
1094 	if (write_acpi_int(asus->handle, METHOD_WWAN, !!status)) {
1095 		pr_warn("Error setting wwan status to %d\n", status);
1096 		return -EIO;
1097 	}
1098 	return 0;
1099 }
1100 
1101 static ssize_t wwan_show(struct device *dev, struct device_attribute *attr,
1102 			 char *buf)
1103 {
1104 	struct asus_laptop *asus = dev_get_drvdata(dev);
1105 
1106 	return sprintf(buf, "%d\n", asus_wireless_status(asus, WW_RSTS));
1107 }
1108 
1109 static ssize_t wwan_store(struct device *dev, struct device_attribute *attr,
1110 			  const char *buf, size_t count)
1111 {
1112 	struct asus_laptop *asus = dev_get_drvdata(dev);
1113 
1114 	return sysfs_acpi_set(asus, buf, count, METHOD_WWAN);
1115 }
1116 static DEVICE_ATTR_RW(wwan);
1117 
1118 /*
1119  * Display
1120  */
1121 static void asus_set_display(struct asus_laptop *asus, int value)
1122 {
1123 	/* no sanity check needed for now */
1124 	if (write_acpi_int(asus->handle, METHOD_SWITCH_DISPLAY, value))
1125 		pr_warn("Error setting display\n");
1126 	return;
1127 }
1128 
1129 /*
1130  * Experimental support for display switching. As of now: 1 should activate
1131  * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
1132  * Any combination (bitwise) of these will suffice. I never actually tested 4
1133  * displays hooked up simultaneously, so be warned. See the acpi4asus README
1134  * for more info.
1135  */
1136 static ssize_t display_store(struct device *dev, struct device_attribute *attr,
1137 			     const char *buf, size_t count)
1138 {
1139 	struct asus_laptop *asus = dev_get_drvdata(dev);
1140 	int rv, value;
1141 
1142 	rv = kstrtoint(buf, 0, &value);
1143 	if (rv < 0)
1144 		return rv;
1145 
1146 	asus_set_display(asus, value);
1147 	return count;
1148 }
1149 static DEVICE_ATTR_WO(display);
1150 
1151 /*
1152  * Light Sens
1153  */
1154 static void asus_als_switch(struct asus_laptop *asus, int value)
1155 {
1156 	int ret;
1157 
1158 	if (asus->is_pega_lucid) {
1159 		ret = asus_pega_lucid_set(asus, PEGA_ALS, value);
1160 		if (!ret)
1161 			ret = asus_pega_lucid_set(asus, PEGA_ALS_POWER, value);
1162 	} else {
1163 		ret = write_acpi_int(asus->handle, METHOD_ALS_CONTROL, value);
1164 	}
1165 	if (ret)
1166 		pr_warning("Error setting light sensor switch\n");
1167 
1168 	asus->light_switch = value;
1169 }
1170 
1171 static ssize_t ls_switch_show(struct device *dev, struct device_attribute *attr,
1172 			      char *buf)
1173 {
1174 	struct asus_laptop *asus = dev_get_drvdata(dev);
1175 
1176 	return sprintf(buf, "%d\n", asus->light_switch);
1177 }
1178 
1179 static ssize_t ls_switch_store(struct device *dev,
1180 			       struct device_attribute *attr, const char *buf,
1181 			       size_t count)
1182 {
1183 	struct asus_laptop *asus = dev_get_drvdata(dev);
1184 	int rv, value;
1185 
1186 	rv = kstrtoint(buf, 0, &value);
1187 	if (rv < 0)
1188 		return rv;
1189 
1190 	asus_als_switch(asus, value ? 1 : 0);
1191 	return count;
1192 }
1193 static DEVICE_ATTR_RW(ls_switch);
1194 
1195 static void asus_als_level(struct asus_laptop *asus, int value)
1196 {
1197 	if (write_acpi_int(asus->handle, METHOD_ALS_LEVEL, value))
1198 		pr_warn("Error setting light sensor level\n");
1199 	asus->light_level = value;
1200 }
1201 
1202 static ssize_t ls_level_show(struct device *dev, struct device_attribute *attr,
1203 			     char *buf)
1204 {
1205 	struct asus_laptop *asus = dev_get_drvdata(dev);
1206 
1207 	return sprintf(buf, "%d\n", asus->light_level);
1208 }
1209 
1210 static ssize_t ls_level_store(struct device *dev, struct device_attribute *attr,
1211 			      const char *buf, size_t count)
1212 {
1213 	struct asus_laptop *asus = dev_get_drvdata(dev);
1214 	int rv, value;
1215 
1216 	rv = kstrtoint(buf, 0, &value);
1217 	if (rv < 0)
1218 		return rv;
1219 
1220 	value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
1221 	/* 0 <= value <= 15 */
1222 	asus_als_level(asus, value);
1223 
1224 	return count;
1225 }
1226 static DEVICE_ATTR_RW(ls_level);
1227 
1228 static int pega_int_read(struct asus_laptop *asus, int arg, int *result)
1229 {
1230 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1231 	int err = write_acpi_int_ret(asus->handle, METHOD_PEGA_READ, arg,
1232 				     &buffer);
1233 	if (!err) {
1234 		union acpi_object *obj = buffer.pointer;
1235 		if (obj && obj->type == ACPI_TYPE_INTEGER)
1236 			*result = obj->integer.value;
1237 		else
1238 			err = -EIO;
1239 	}
1240 	return err;
1241 }
1242 
1243 static ssize_t ls_value_show(struct device *dev, struct device_attribute *attr,
1244 			     char *buf)
1245 {
1246 	struct asus_laptop *asus = dev_get_drvdata(dev);
1247 	int err, hi, lo;
1248 
1249 	err = pega_int_read(asus, PEGA_READ_ALS_H, &hi);
1250 	if (!err)
1251 		err = pega_int_read(asus, PEGA_READ_ALS_L, &lo);
1252 	if (!err)
1253 		return sprintf(buf, "%d\n", 10 * hi + lo);
1254 	return err;
1255 }
1256 static DEVICE_ATTR_RO(ls_value);
1257 
1258 /*
1259  * GPS
1260  */
1261 static int asus_gps_status(struct asus_laptop *asus)
1262 {
1263 	unsigned long long status;
1264 	acpi_status rv;
1265 
1266 	rv = acpi_evaluate_integer(asus->handle, METHOD_GPS_STATUS,
1267 				   NULL, &status);
1268 	if (ACPI_FAILURE(rv)) {
1269 		pr_warn("Error reading GPS status\n");
1270 		return -ENODEV;
1271 	}
1272 	return !!status;
1273 }
1274 
1275 static int asus_gps_switch(struct asus_laptop *asus, int status)
1276 {
1277 	const char *meth = status ? METHOD_GPS_ON : METHOD_GPS_OFF;
1278 
1279 	if (write_acpi_int(asus->handle, meth, 0x02))
1280 		return -ENODEV;
1281 	return 0;
1282 }
1283 
1284 static ssize_t gps_show(struct device *dev, struct device_attribute *attr,
1285 			char *buf)
1286 {
1287 	struct asus_laptop *asus = dev_get_drvdata(dev);
1288 
1289 	return sprintf(buf, "%d\n", asus_gps_status(asus));
1290 }
1291 
1292 static ssize_t gps_store(struct device *dev, struct device_attribute *attr,
1293 			 const char *buf, size_t count)
1294 {
1295 	struct asus_laptop *asus = dev_get_drvdata(dev);
1296 	int rv, value;
1297 	int ret;
1298 
1299 	rv = kstrtoint(buf, 0, &value);
1300 	if (rv < 0)
1301 		return rv;
1302 	ret = asus_gps_switch(asus, !!value);
1303 	if (ret)
1304 		return ret;
1305 	rfkill_set_sw_state(asus->gps.rfkill, !value);
1306 	return count;
1307 }
1308 static DEVICE_ATTR_RW(gps);
1309 
1310 /*
1311  * rfkill
1312  */
1313 static int asus_gps_rfkill_set(void *data, bool blocked)
1314 {
1315 	struct asus_laptop *asus = data;
1316 
1317 	return asus_gps_switch(asus, !blocked);
1318 }
1319 
1320 static const struct rfkill_ops asus_gps_rfkill_ops = {
1321 	.set_block = asus_gps_rfkill_set,
1322 };
1323 
1324 static int asus_rfkill_set(void *data, bool blocked)
1325 {
1326 	struct asus_rfkill *rfk = data;
1327 	struct asus_laptop *asus = rfk->asus;
1328 
1329 	if (rfk->control_id == WL_RSTS)
1330 		return asus_wlan_set(asus, !blocked);
1331 	else if (rfk->control_id == BT_RSTS)
1332 		return asus_bluetooth_set(asus, !blocked);
1333 	else if (rfk->control_id == WM_RSTS)
1334 		return asus_wimax_set(asus, !blocked);
1335 	else if (rfk->control_id == WW_RSTS)
1336 		return asus_wwan_set(asus, !blocked);
1337 
1338 	return -EINVAL;
1339 }
1340 
1341 static const struct rfkill_ops asus_rfkill_ops = {
1342 	.set_block = asus_rfkill_set,
1343 };
1344 
1345 static void asus_rfkill_terminate(struct asus_rfkill *rfk)
1346 {
1347 	if (!rfk->rfkill)
1348 		return ;
1349 
1350 	rfkill_unregister(rfk->rfkill);
1351 	rfkill_destroy(rfk->rfkill);
1352 	rfk->rfkill = NULL;
1353 }
1354 
1355 static void asus_rfkill_exit(struct asus_laptop *asus)
1356 {
1357 	asus_rfkill_terminate(&asus->wwan);
1358 	asus_rfkill_terminate(&asus->bluetooth);
1359 	asus_rfkill_terminate(&asus->wlan);
1360 	asus_rfkill_terminate(&asus->gps);
1361 }
1362 
1363 static int asus_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1364 			     const char *name, int control_id, int type,
1365 			     const struct rfkill_ops *ops)
1366 {
1367 	int result;
1368 
1369 	rfk->control_id = control_id;
1370 	rfk->asus = asus;
1371 	rfk->rfkill = rfkill_alloc(name, &asus->platform_device->dev,
1372 				   type, ops, rfk);
1373 	if (!rfk->rfkill)
1374 		return -EINVAL;
1375 
1376 	result = rfkill_register(rfk->rfkill);
1377 	if (result) {
1378 		rfkill_destroy(rfk->rfkill);
1379 		rfk->rfkill = NULL;
1380 	}
1381 
1382 	return result;
1383 }
1384 
1385 static int asus_rfkill_init(struct asus_laptop *asus)
1386 {
1387 	int result = 0;
1388 
1389 	if (asus->is_pega_lucid)
1390 		return -ENODEV;
1391 
1392 	if (!acpi_check_handle(asus->handle, METHOD_GPS_ON, NULL) &&
1393 	    !acpi_check_handle(asus->handle, METHOD_GPS_OFF, NULL) &&
1394 	    !acpi_check_handle(asus->handle, METHOD_GPS_STATUS, NULL))
1395 		result = asus_rfkill_setup(asus, &asus->gps, "asus-gps",
1396 					   -1, RFKILL_TYPE_GPS,
1397 					   &asus_gps_rfkill_ops);
1398 	if (result)
1399 		goto exit;
1400 
1401 
1402 	if (!acpi_check_handle(asus->handle, METHOD_WLAN, NULL) &&
1403 	    asus->wled_type == TYPE_RFKILL)
1404 		result = asus_rfkill_setup(asus, &asus->wlan, "asus-wlan",
1405 					   WL_RSTS, RFKILL_TYPE_WLAN,
1406 					   &asus_rfkill_ops);
1407 	if (result)
1408 		goto exit;
1409 
1410 	if (!acpi_check_handle(asus->handle, METHOD_BLUETOOTH, NULL) &&
1411 	    asus->bled_type == TYPE_RFKILL)
1412 		result = asus_rfkill_setup(asus, &asus->bluetooth,
1413 					   "asus-bluetooth", BT_RSTS,
1414 					   RFKILL_TYPE_BLUETOOTH,
1415 					   &asus_rfkill_ops);
1416 	if (result)
1417 		goto exit;
1418 
1419 	if (!acpi_check_handle(asus->handle, METHOD_WWAN, NULL))
1420 		result = asus_rfkill_setup(asus, &asus->wwan, "asus-wwan",
1421 					   WW_RSTS, RFKILL_TYPE_WWAN,
1422 					   &asus_rfkill_ops);
1423 	if (result)
1424 		goto exit;
1425 
1426 	if (!acpi_check_handle(asus->handle, METHOD_WIMAX, NULL))
1427 		result = asus_rfkill_setup(asus, &asus->wimax, "asus-wimax",
1428 					   WM_RSTS, RFKILL_TYPE_WIMAX,
1429 					   &asus_rfkill_ops);
1430 	if (result)
1431 		goto exit;
1432 
1433 exit:
1434 	if (result)
1435 		asus_rfkill_exit(asus);
1436 
1437 	return result;
1438 }
1439 
1440 static int pega_rfkill_set(void *data, bool blocked)
1441 {
1442 	struct asus_rfkill *rfk = data;
1443 
1444 	int ret = asus_pega_lucid_set(rfk->asus, rfk->control_id, !blocked);
1445 	return ret;
1446 }
1447 
1448 static const struct rfkill_ops pega_rfkill_ops = {
1449 	.set_block = pega_rfkill_set,
1450 };
1451 
1452 static int pega_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1453 			     const char *name, int controlid, int rfkill_type)
1454 {
1455 	return asus_rfkill_setup(asus, rfk, name, controlid, rfkill_type,
1456 				 &pega_rfkill_ops);
1457 }
1458 
1459 static int pega_rfkill_init(struct asus_laptop *asus)
1460 {
1461 	int ret = 0;
1462 
1463 	if(!asus->is_pega_lucid)
1464 		return -ENODEV;
1465 
1466 	ret = pega_rfkill_setup(asus, &asus->wlan, "pega-wlan",
1467 				PEGA_WLAN, RFKILL_TYPE_WLAN);
1468 	if(ret)
1469 		goto exit;
1470 
1471 	ret = pega_rfkill_setup(asus, &asus->bluetooth, "pega-bt",
1472 				PEGA_BLUETOOTH, RFKILL_TYPE_BLUETOOTH);
1473 	if(ret)
1474 		goto exit;
1475 
1476 	ret = pega_rfkill_setup(asus, &asus->wwan, "pega-wwan",
1477 				PEGA_WWAN, RFKILL_TYPE_WWAN);
1478 
1479 exit:
1480 	if (ret)
1481 		asus_rfkill_exit(asus);
1482 
1483 	return ret;
1484 }
1485 
1486 /*
1487  * Input device (i.e. hotkeys)
1488  */
1489 static void asus_input_notify(struct asus_laptop *asus, int event)
1490 {
1491 	if (!asus->inputdev)
1492 		return ;
1493 	if (!sparse_keymap_report_event(asus->inputdev, event, 1, true))
1494 		pr_info("Unknown key %x pressed\n", event);
1495 }
1496 
1497 static int asus_input_init(struct asus_laptop *asus)
1498 {
1499 	struct input_dev *input;
1500 	int error;
1501 
1502 	input = input_allocate_device();
1503 	if (!input)
1504 		return -ENOMEM;
1505 
1506 	input->name = "Asus Laptop extra buttons";
1507 	input->phys = ASUS_LAPTOP_FILE "/input0";
1508 	input->id.bustype = BUS_HOST;
1509 	input->dev.parent = &asus->platform_device->dev;
1510 
1511 	error = sparse_keymap_setup(input, asus_keymap, NULL);
1512 	if (error) {
1513 		pr_err("Unable to setup input device keymap\n");
1514 		goto err_free_dev;
1515 	}
1516 	error = input_register_device(input);
1517 	if (error) {
1518 		pr_warn("Unable to register input device\n");
1519 		goto err_free_dev;
1520 	}
1521 
1522 	asus->inputdev = input;
1523 	return 0;
1524 
1525 err_free_dev:
1526 	input_free_device(input);
1527 	return error;
1528 }
1529 
1530 static void asus_input_exit(struct asus_laptop *asus)
1531 {
1532 	if (asus->inputdev)
1533 		input_unregister_device(asus->inputdev);
1534 	asus->inputdev = NULL;
1535 }
1536 
1537 /*
1538  * ACPI driver
1539  */
1540 static void asus_acpi_notify(struct acpi_device *device, u32 event)
1541 {
1542 	struct asus_laptop *asus = acpi_driver_data(device);
1543 	u16 count;
1544 
1545 	/* TODO Find a better way to handle events count. */
1546 	count = asus->event_count[event % 128]++;
1547 	acpi_bus_generate_netlink_event(asus->device->pnp.device_class,
1548 					dev_name(&asus->device->dev), event,
1549 					count);
1550 
1551 	if (event >= ATKD_BRNUP_MIN && event <= ATKD_BRNUP_MAX)
1552 		event = ATKD_BRNUP;
1553 	else if (event >= ATKD_BRNDOWN_MIN &&
1554 		 event <= ATKD_BRNDOWN_MAX)
1555 		event = ATKD_BRNDOWN;
1556 
1557 	/* Brightness events are special */
1558 	if (event == ATKD_BRNDOWN || event == ATKD_BRNUP) {
1559 		if (asus->backlight_device != NULL) {
1560 			/* Update the backlight device. */
1561 			asus_backlight_notify(asus);
1562 			return ;
1563 		}
1564 	}
1565 
1566 	/* Accelerometer "coarse orientation change" event */
1567 	if (asus->pega_accel_poll && event == 0xEA) {
1568 		kobject_uevent(&asus->pega_accel_poll->input->dev.kobj,
1569 			       KOBJ_CHANGE);
1570 		return ;
1571 	}
1572 
1573 	asus_input_notify(asus, event);
1574 }
1575 
1576 static struct attribute *asus_attributes[] = {
1577 	&dev_attr_infos.attr,
1578 	&dev_attr_wlan.attr,
1579 	&dev_attr_bluetooth.attr,
1580 	&dev_attr_wimax.attr,
1581 	&dev_attr_wwan.attr,
1582 	&dev_attr_display.attr,
1583 	&dev_attr_ledd.attr,
1584 	&dev_attr_ls_value.attr,
1585 	&dev_attr_ls_level.attr,
1586 	&dev_attr_ls_switch.attr,
1587 	&dev_attr_gps.attr,
1588 	NULL
1589 };
1590 
1591 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1592 				    struct attribute *attr,
1593 				    int idx)
1594 {
1595 	struct device *dev = container_of(kobj, struct device, kobj);
1596 	struct asus_laptop *asus = dev_get_drvdata(dev);
1597 	acpi_handle handle = asus->handle;
1598 	bool supported;
1599 
1600 	if (asus->is_pega_lucid) {
1601 		/* no ls_level interface on the Lucid */
1602 		if (attr == &dev_attr_ls_switch.attr)
1603 			supported = true;
1604 		else if (attr == &dev_attr_ls_level.attr)
1605 			supported = false;
1606 		else
1607 			goto normal;
1608 
1609 		return supported ? attr->mode : 0;
1610 	}
1611 
1612 normal:
1613 	if (attr == &dev_attr_wlan.attr) {
1614 		supported = !acpi_check_handle(handle, METHOD_WLAN, NULL);
1615 
1616 	} else if (attr == &dev_attr_bluetooth.attr) {
1617 		supported = !acpi_check_handle(handle, METHOD_BLUETOOTH, NULL);
1618 
1619 	} else if (attr == &dev_attr_display.attr) {
1620 		supported = !acpi_check_handle(handle, METHOD_SWITCH_DISPLAY, NULL);
1621 
1622 	} else if (attr == &dev_attr_wimax.attr) {
1623 		supported =
1624 			!acpi_check_handle(asus->handle, METHOD_WIMAX, NULL);
1625 
1626 	} else if (attr == &dev_attr_wwan.attr) {
1627 		supported = !acpi_check_handle(asus->handle, METHOD_WWAN, NULL);
1628 
1629 	} else if (attr == &dev_attr_ledd.attr) {
1630 		supported = !acpi_check_handle(handle, METHOD_LEDD, NULL);
1631 
1632 	} else if (attr == &dev_attr_ls_switch.attr ||
1633 		   attr == &dev_attr_ls_level.attr) {
1634 		supported = !acpi_check_handle(handle, METHOD_ALS_CONTROL, NULL) &&
1635 			!acpi_check_handle(handle, METHOD_ALS_LEVEL, NULL);
1636 	} else if (attr == &dev_attr_ls_value.attr) {
1637 		supported = asus->is_pega_lucid;
1638 	} else if (attr == &dev_attr_gps.attr) {
1639 		supported = !acpi_check_handle(handle, METHOD_GPS_ON, NULL) &&
1640 			    !acpi_check_handle(handle, METHOD_GPS_OFF, NULL) &&
1641 			    !acpi_check_handle(handle, METHOD_GPS_STATUS, NULL);
1642 	} else {
1643 		supported = true;
1644 	}
1645 
1646 	return supported ? attr->mode : 0;
1647 }
1648 
1649 
1650 static const struct attribute_group asus_attr_group = {
1651 	.is_visible	= asus_sysfs_is_visible,
1652 	.attrs		= asus_attributes,
1653 };
1654 
1655 static int asus_platform_init(struct asus_laptop *asus)
1656 {
1657 	int result;
1658 
1659 	asus->platform_device = platform_device_alloc(ASUS_LAPTOP_FILE, -1);
1660 	if (!asus->platform_device)
1661 		return -ENOMEM;
1662 	platform_set_drvdata(asus->platform_device, asus);
1663 
1664 	result = platform_device_add(asus->platform_device);
1665 	if (result)
1666 		goto fail_platform_device;
1667 
1668 	result = sysfs_create_group(&asus->platform_device->dev.kobj,
1669 				    &asus_attr_group);
1670 	if (result)
1671 		goto fail_sysfs;
1672 
1673 	return 0;
1674 
1675 fail_sysfs:
1676 	platform_device_del(asus->platform_device);
1677 fail_platform_device:
1678 	platform_device_put(asus->platform_device);
1679 	return result;
1680 }
1681 
1682 static void asus_platform_exit(struct asus_laptop *asus)
1683 {
1684 	sysfs_remove_group(&asus->platform_device->dev.kobj, &asus_attr_group);
1685 	platform_device_unregister(asus->platform_device);
1686 }
1687 
1688 static struct platform_driver platform_driver = {
1689 	.driver = {
1690 		.name = ASUS_LAPTOP_FILE,
1691 	},
1692 };
1693 
1694 /*
1695  * This function is used to initialize the context with right values. In this
1696  * method, we can make all the detection we want, and modify the asus_laptop
1697  * struct
1698  */
1699 static int asus_laptop_get_info(struct asus_laptop *asus)
1700 {
1701 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1702 	union acpi_object *model = NULL;
1703 	unsigned long long bsts_result;
1704 	char *string = NULL;
1705 	acpi_status status;
1706 
1707 	/*
1708 	 * Get DSDT headers early enough to allow for differentiating between
1709 	 * models, but late enough to allow acpi_bus_register_driver() to fail
1710 	 * before doing anything ACPI-specific. Should we encounter a machine,
1711 	 * which needs special handling (i.e. its hotkey device has a different
1712 	 * HID), this bit will be moved.
1713 	 */
1714 	status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus->dsdt_info);
1715 	if (ACPI_FAILURE(status))
1716 		pr_warn("Couldn't get the DSDT table header\n");
1717 
1718 	/* We have to write 0 on init this far for all ASUS models */
1719 	if (write_acpi_int_ret(asus->handle, "INIT", 0, &buffer)) {
1720 		pr_err("Hotkey initialization failed\n");
1721 		return -ENODEV;
1722 	}
1723 
1724 	/* This needs to be called for some laptops to init properly */
1725 	status =
1726 	    acpi_evaluate_integer(asus->handle, "BSTS", NULL, &bsts_result);
1727 	if (ACPI_FAILURE(status))
1728 		pr_warn("Error calling BSTS\n");
1729 	else if (bsts_result)
1730 		pr_notice("BSTS called, 0x%02x returned\n",
1731 		       (uint) bsts_result);
1732 
1733 	/* This too ... */
1734 	if (write_acpi_int(asus->handle, "CWAP", wapf))
1735 		pr_err("Error calling CWAP(%d)\n", wapf);
1736 	/*
1737 	 * Try to match the object returned by INIT to the specific model.
1738 	 * Handle every possible object (or the lack of thereof) the DSDT
1739 	 * writers might throw at us. When in trouble, we pass NULL to
1740 	 * asus_model_match() and try something completely different.
1741 	 */
1742 	if (buffer.pointer) {
1743 		model = buffer.pointer;
1744 		switch (model->type) {
1745 		case ACPI_TYPE_STRING:
1746 			string = model->string.pointer;
1747 			break;
1748 		case ACPI_TYPE_BUFFER:
1749 			string = model->buffer.pointer;
1750 			break;
1751 		default:
1752 			string = "";
1753 			break;
1754 		}
1755 	}
1756 	asus->name = kstrdup(string, GFP_KERNEL);
1757 	if (!asus->name) {
1758 		kfree(buffer.pointer);
1759 		return -ENOMEM;
1760 	}
1761 
1762 	if (string)
1763 		pr_notice("  %s model detected\n", string);
1764 
1765 	if (!acpi_check_handle(asus->handle, METHOD_WL_STATUS, NULL))
1766 		asus->have_rsts = true;
1767 
1768 	kfree(model);
1769 
1770 	return AE_OK;
1771 }
1772 
1773 static int asus_acpi_init(struct asus_laptop *asus)
1774 {
1775 	int result = 0;
1776 
1777 	result = acpi_bus_get_status(asus->device);
1778 	if (result)
1779 		return result;
1780 	if (!asus->device->status.present) {
1781 		pr_err("Hotkey device not present, aborting\n");
1782 		return -ENODEV;
1783 	}
1784 
1785 	result = asus_laptop_get_info(asus);
1786 	if (result)
1787 		return result;
1788 
1789 	if (!strcmp(bled_type, "led"))
1790 		asus->bled_type = TYPE_LED;
1791 	else if (!strcmp(bled_type, "rfkill"))
1792 		asus->bled_type = TYPE_RFKILL;
1793 
1794 	if (!strcmp(wled_type, "led"))
1795 		asus->wled_type = TYPE_LED;
1796 	else if (!strcmp(wled_type, "rfkill"))
1797 		asus->wled_type = TYPE_RFKILL;
1798 
1799 	if (bluetooth_status >= 0)
1800 		asus_bluetooth_set(asus, !!bluetooth_status);
1801 
1802 	if (wlan_status >= 0)
1803 		asus_wlan_set(asus, !!wlan_status);
1804 
1805 	if (wimax_status >= 0)
1806 		asus_wimax_set(asus, !!wimax_status);
1807 
1808 	if (wwan_status >= 0)
1809 		asus_wwan_set(asus, !!wwan_status);
1810 
1811 	/* Keyboard Backlight is on by default */
1812 	if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL))
1813 		asus_kled_set(asus, 1);
1814 
1815 	/* LED display is off by default */
1816 	asus->ledd_status = 0xFFF;
1817 
1818 	/* Set initial values of light sensor and level */
1819 	asus->light_switch = !!als_status;
1820 	asus->light_level = 5;	/* level 5 for sensor sensitivity */
1821 
1822 	if (asus->is_pega_lucid) {
1823 		asus_als_switch(asus, asus->light_switch);
1824 	} else if (!acpi_check_handle(asus->handle, METHOD_ALS_CONTROL, NULL) &&
1825 		   !acpi_check_handle(asus->handle, METHOD_ALS_LEVEL, NULL)) {
1826 		asus_als_switch(asus, asus->light_switch);
1827 		asus_als_level(asus, asus->light_level);
1828 	}
1829 
1830 	return result;
1831 }
1832 
1833 static void asus_dmi_check(void)
1834 {
1835 	const char *model;
1836 
1837 	model = dmi_get_system_info(DMI_PRODUCT_NAME);
1838 	if (!model)
1839 		return;
1840 
1841 	/* On L1400B WLED control the sound card, don't mess with it ... */
1842 	if (strncmp(model, "L1400B", 6) == 0) {
1843 		wlan_status = -1;
1844 	}
1845 }
1846 
1847 static bool asus_device_present;
1848 
1849 static int asus_acpi_add(struct acpi_device *device)
1850 {
1851 	struct asus_laptop *asus;
1852 	int result;
1853 
1854 	pr_notice("Asus Laptop Support version %s\n",
1855 		  ASUS_LAPTOP_VERSION);
1856 	asus = kzalloc(sizeof(struct asus_laptop), GFP_KERNEL);
1857 	if (!asus)
1858 		return -ENOMEM;
1859 	asus->handle = device->handle;
1860 	strcpy(acpi_device_name(device), ASUS_LAPTOP_DEVICE_NAME);
1861 	strcpy(acpi_device_class(device), ASUS_LAPTOP_CLASS);
1862 	device->driver_data = asus;
1863 	asus->device = device;
1864 
1865 	asus_dmi_check();
1866 
1867 	result = asus_acpi_init(asus);
1868 	if (result)
1869 		goto fail_platform;
1870 
1871 	/*
1872 	 * Need platform type detection first, then the platform
1873 	 * device.  It is used as a parent for the sub-devices below.
1874 	 */
1875 	asus->is_pega_lucid = asus_check_pega_lucid(asus);
1876 	result = asus_platform_init(asus);
1877 	if (result)
1878 		goto fail_platform;
1879 
1880 	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1881 		result = asus_backlight_init(asus);
1882 		if (result)
1883 			goto fail_backlight;
1884 	}
1885 
1886 	result = asus_input_init(asus);
1887 	if (result)
1888 		goto fail_input;
1889 
1890 	result = asus_led_init(asus);
1891 	if (result)
1892 		goto fail_led;
1893 
1894 	result = asus_rfkill_init(asus);
1895 	if (result && result != -ENODEV)
1896 		goto fail_rfkill;
1897 
1898 	result = pega_accel_init(asus);
1899 	if (result && result != -ENODEV)
1900 		goto fail_pega_accel;
1901 
1902 	result = pega_rfkill_init(asus);
1903 	if (result && result != -ENODEV)
1904 		goto fail_pega_rfkill;
1905 
1906 	asus_device_present = true;
1907 	return 0;
1908 
1909 fail_pega_rfkill:
1910 	pega_accel_exit(asus);
1911 fail_pega_accel:
1912 	asus_rfkill_exit(asus);
1913 fail_rfkill:
1914 	asus_led_exit(asus);
1915 fail_led:
1916 	asus_input_exit(asus);
1917 fail_input:
1918 	asus_backlight_exit(asus);
1919 fail_backlight:
1920 	asus_platform_exit(asus);
1921 fail_platform:
1922 	kfree(asus);
1923 
1924 	return result;
1925 }
1926 
1927 static int asus_acpi_remove(struct acpi_device *device)
1928 {
1929 	struct asus_laptop *asus = acpi_driver_data(device);
1930 
1931 	asus_backlight_exit(asus);
1932 	asus_rfkill_exit(asus);
1933 	asus_led_exit(asus);
1934 	asus_input_exit(asus);
1935 	pega_accel_exit(asus);
1936 	asus_platform_exit(asus);
1937 
1938 	kfree(asus->name);
1939 	kfree(asus);
1940 	return 0;
1941 }
1942 
1943 static const struct acpi_device_id asus_device_ids[] = {
1944 	{"ATK0100", 0},
1945 	{"ATK0101", 0},
1946 	{"", 0},
1947 };
1948 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
1949 
1950 static struct acpi_driver asus_acpi_driver = {
1951 	.name = ASUS_LAPTOP_NAME,
1952 	.class = ASUS_LAPTOP_CLASS,
1953 	.owner = THIS_MODULE,
1954 	.ids = asus_device_ids,
1955 	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1956 	.ops = {
1957 		.add = asus_acpi_add,
1958 		.remove = asus_acpi_remove,
1959 		.notify = asus_acpi_notify,
1960 		},
1961 };
1962 
1963 static int __init asus_laptop_init(void)
1964 {
1965 	int result;
1966 
1967 	result = platform_driver_register(&platform_driver);
1968 	if (result < 0)
1969 		return result;
1970 
1971 	result = acpi_bus_register_driver(&asus_acpi_driver);
1972 	if (result < 0)
1973 		goto fail_acpi_driver;
1974 	if (!asus_device_present) {
1975 		result = -ENODEV;
1976 		goto fail_no_device;
1977 	}
1978 	return 0;
1979 
1980 fail_no_device:
1981 	acpi_bus_unregister_driver(&asus_acpi_driver);
1982 fail_acpi_driver:
1983 	platform_driver_unregister(&platform_driver);
1984 	return result;
1985 }
1986 
1987 static void __exit asus_laptop_exit(void)
1988 {
1989 	acpi_bus_unregister_driver(&asus_acpi_driver);
1990 	platform_driver_unregister(&platform_driver);
1991 }
1992 
1993 module_init(asus_laptop_init);
1994 module_exit(asus_laptop_exit);
1995