1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *  asus-laptop.c - Asus Laptop Support
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  *  The development page for this driver is located at
10  *  http://sourceforge.net/projects/acpi4asus/
11  *
12  *  Credits:
13  *  Pontus Fuchs   - Helper functions, cleanup
14  *  Johann Wiesner - Small compile fixes
15  *  John Belmonte  - ACPI code for Toshiba laptop was a good starting point.
16  *  Eric Burghard  - LED display support for W1N
17  *  Josh Green     - Light Sens support
18  *  Thomas Tuttle  - His first patch for led support was very helpful
19  *  Sam Lin        - GPS support
20  */
21 
22 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23 
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/types.h>
28 #include <linux/err.h>
29 #include <linux/proc_fs.h>
30 #include <linux/backlight.h>
31 #include <linux/fb.h>
32 #include <linux/leds.h>
33 #include <linux/platform_device.h>
34 #include <linux/uaccess.h>
35 #include <linux/input.h>
36 #include <linux/input/sparse-keymap.h>
37 #include <linux/rfkill.h>
38 #include <linux/slab.h>
39 #include <linux/dmi.h>
40 #include <linux/acpi.h>
41 #include <acpi/video.h>
42 
43 #define ASUS_LAPTOP_VERSION	"0.42"
44 
45 #define ASUS_LAPTOP_NAME	"Asus Laptop Support"
46 #define ASUS_LAPTOP_CLASS	"hotkey"
47 #define ASUS_LAPTOP_DEVICE_NAME	"Hotkey"
48 #define ASUS_LAPTOP_FILE	KBUILD_MODNAME
49 #define ASUS_LAPTOP_PREFIX	"\\_SB.ATKD."
50 
51 MODULE_AUTHOR("Julien Lerouge, Karol Kozimor, Corentin Chary");
52 MODULE_DESCRIPTION(ASUS_LAPTOP_NAME);
53 MODULE_LICENSE("GPL");
54 
55 /*
56  * WAPF defines the behavior of the Fn+Fx wlan key
57  * The significance of values is yet to be found, but
58  * most of the time:
59  * Bit | Bluetooth | WLAN
60  *  0  | Hardware  | Hardware
61  *  1  | Hardware  | Software
62  *  4  | Software  | Software
63  */
64 static uint wapf = 1;
65 module_param(wapf, uint, 0444);
66 MODULE_PARM_DESC(wapf, "WAPF value");
67 
68 static char *wled_type = "unknown";
69 static char *bled_type = "unknown";
70 
71 module_param(wled_type, charp, 0444);
72 MODULE_PARM_DESC(wled_type, "Set the wled type on boot "
73 		 "(unknown, led or rfkill). "
74 		 "default is unknown");
75 
76 module_param(bled_type, charp, 0444);
77 MODULE_PARM_DESC(bled_type, "Set the bled type on boot "
78 		 "(unknown, led or rfkill). "
79 		 "default is unknown");
80 
81 static int wlan_status = 1;
82 static int bluetooth_status = 1;
83 static int wimax_status = -1;
84 static int wwan_status = -1;
85 static int als_status;
86 
87 module_param(wlan_status, int, 0444);
88 MODULE_PARM_DESC(wlan_status, "Set the wireless status on boot "
89 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
90 		 "default is -1");
91 
92 module_param(bluetooth_status, int, 0444);
93 MODULE_PARM_DESC(bluetooth_status, "Set the wireless status on boot "
94 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
95 		 "default is -1");
96 
97 module_param(wimax_status, int, 0444);
98 MODULE_PARM_DESC(wimax_status, "Set the wireless status on boot "
99 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
100 		 "default is -1");
101 
102 module_param(wwan_status, int, 0444);
103 MODULE_PARM_DESC(wwan_status, "Set the wireless status on boot "
104 		 "(0 = disabled, 1 = enabled, -1 = don't do anything). "
105 		 "default is -1");
106 
107 module_param(als_status, int, 0444);
108 MODULE_PARM_DESC(als_status, "Set the ALS status on boot "
109 		 "(0 = disabled, 1 = enabled). "
110 		 "default is 0");
111 
112 /*
113  * Some events we use, same for all Asus
114  */
115 #define ATKD_BRNUP_MIN		0x10
116 #define ATKD_BRNUP_MAX		0x1f
117 #define ATKD_BRNDOWN_MIN	0x20
118 #define ATKD_BRNDOWN_MAX	0x2f
119 #define ATKD_BRNDOWN		0x20
120 #define ATKD_BRNUP		0x2f
121 #define ATKD_LCD_ON	0x33
122 #define ATKD_LCD_OFF	0x34
123 
124 /*
125  * Known bits returned by \_SB.ATKD.HWRS
126  */
127 #define WL_HWRS		0x80
128 #define BT_HWRS		0x100
129 
130 /*
131  * Flags for hotk status
132  * WL_ON and BT_ON are also used for wireless_status()
133  */
134 #define WL_RSTS		0x01	/* internal Wifi */
135 #define BT_RSTS		0x02	/* internal Bluetooth */
136 #define WM_RSTS		0x08    /* internal wimax */
137 #define WW_RSTS		0x20    /* internal wwan */
138 
139 /* WLED and BLED type */
140 #define TYPE_UNKNOWN	0
141 #define TYPE_LED	1
142 #define TYPE_RFKILL	2
143 
144 /* LED */
145 #define METHOD_MLED		"MLED"
146 #define METHOD_TLED		"TLED"
147 #define METHOD_RLED		"RLED"	/* W1JC */
148 #define METHOD_PLED		"PLED"	/* A7J */
149 #define METHOD_GLED		"GLED"	/* G1, G2 (probably) */
150 
151 /* LEDD */
152 #define METHOD_LEDD		"SLCM"
153 
154 /*
155  * Bluetooth and WLAN
156  * WLED and BLED are not handled like other XLED, because in some dsdt
157  * they also control the WLAN/Bluetooth device.
158  */
159 #define METHOD_WLAN		"WLED"
160 #define METHOD_BLUETOOTH	"BLED"
161 
162 /* WWAN and WIMAX */
163 #define METHOD_WWAN		"GSMC"
164 #define METHOD_WIMAX		"WMXC"
165 
166 #define METHOD_WL_STATUS	"RSTS"
167 
168 /* Brightness */
169 #define METHOD_BRIGHTNESS_SET	"SPLV"
170 #define METHOD_BRIGHTNESS_GET	"GPLV"
171 
172 /* Display */
173 #define METHOD_SWITCH_DISPLAY	"SDSP"
174 
175 #define METHOD_ALS_CONTROL	"ALSC" /* Z71A Z71V */
176 #define METHOD_ALS_LEVEL	"ALSL" /* Z71A Z71V */
177 
178 /* GPS */
179 /* R2H use different handle for GPS on/off */
180 #define METHOD_GPS_ON		"SDON"
181 #define METHOD_GPS_OFF		"SDOF"
182 #define METHOD_GPS_STATUS	"GPST"
183 
184 /* Keyboard light */
185 #define METHOD_KBD_LIGHT_SET	"SLKB"
186 #define METHOD_KBD_LIGHT_GET	"GLKB"
187 
188 /* For Pegatron Lucid tablet */
189 #define DEVICE_NAME_PEGA	"Lucid"
190 
191 #define METHOD_PEGA_ENABLE	"ENPR"
192 #define METHOD_PEGA_DISABLE	"DAPR"
193 #define PEGA_WLAN	0x00
194 #define PEGA_BLUETOOTH	0x01
195 #define PEGA_WWAN	0x02
196 #define PEGA_ALS	0x04
197 #define PEGA_ALS_POWER	0x05
198 
199 #define METHOD_PEGA_READ	"RDLN"
200 #define PEGA_READ_ALS_H	0x02
201 #define PEGA_READ_ALS_L	0x03
202 
203 #define PEGA_ACCEL_NAME "pega_accel"
204 #define PEGA_ACCEL_DESC "Pegatron Lucid Tablet Accelerometer"
205 #define METHOD_XLRX "XLRX"
206 #define METHOD_XLRY "XLRY"
207 #define METHOD_XLRZ "XLRZ"
208 #define PEGA_ACC_CLAMP 512 /* 1G accel is reported as ~256, so clamp to 2G */
209 #define PEGA_ACC_RETRIES 3
210 
211 /*
212  * Define a specific led structure to keep the main structure clean
213  */
214 struct asus_led {
215 	int wk;
216 	struct work_struct work;
217 	struct led_classdev led;
218 	struct asus_laptop *asus;
219 	const char *method;
220 };
221 
222 /*
223  * Same thing for rfkill
224  */
225 struct asus_rfkill {
226 	/* type of control. Maps to PEGA_* values or *_RSTS  */
227 	int control_id;
228 	struct rfkill *rfkill;
229 	struct asus_laptop *asus;
230 };
231 
232 /*
233  * This is the main structure, we can use it to store anything interesting
234  * about the hotk device
235  */
236 struct asus_laptop {
237 	char *name;		/* laptop name */
238 
239 	struct acpi_table_header *dsdt_info;
240 	struct platform_device *platform_device;
241 	struct acpi_device *device;		/* the device we are in */
242 	struct backlight_device *backlight_device;
243 
244 	struct input_dev *inputdev;
245 	struct key_entry *keymap;
246 	struct input_dev *pega_accel_poll;
247 
248 	struct asus_led wled;
249 	struct asus_led bled;
250 	struct asus_led mled;
251 	struct asus_led tled;
252 	struct asus_led rled;
253 	struct asus_led pled;
254 	struct asus_led gled;
255 	struct asus_led kled;
256 	struct workqueue_struct *led_workqueue;
257 
258 	int wled_type;
259 	int bled_type;
260 	int wireless_status;
261 	bool have_rsts;
262 	bool is_pega_lucid;
263 	bool pega_acc_live;
264 	int pega_acc_x;
265 	int pega_acc_y;
266 	int pega_acc_z;
267 
268 	struct asus_rfkill wlan;
269 	struct asus_rfkill bluetooth;
270 	struct asus_rfkill wwan;
271 	struct asus_rfkill wimax;
272 	struct asus_rfkill gps;
273 
274 	acpi_handle handle;	/* the handle of the hotk device */
275 	u32 ledd_status;	/* status of the LED display */
276 	u8 light_level;		/* light sensor level */
277 	u8 light_switch;	/* light sensor switch value */
278 	u16 event_count[128];	/* count for each event TODO make this better */
279 };
280 
281 static const struct key_entry asus_keymap[] = {
282 	/* Lenovo SL Specific keycodes */
283 	{KE_KEY, 0x02, { KEY_SCREENLOCK } },
284 	{KE_KEY, 0x05, { KEY_WLAN } },
285 	{KE_KEY, 0x08, { KEY_F13 } },
286 	{KE_KEY, 0x09, { KEY_PROG2 } }, /* Dock */
287 	{KE_KEY, 0x17, { KEY_ZOOM } },
288 	{KE_KEY, 0x1f, { KEY_BATTERY } },
289 	/* End of Lenovo SL Specific keycodes */
290 	{KE_KEY, ATKD_BRNDOWN, { KEY_BRIGHTNESSDOWN } },
291 	{KE_KEY, ATKD_BRNUP, { KEY_BRIGHTNESSUP } },
292 	{KE_KEY, 0x30, { KEY_VOLUMEUP } },
293 	{KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
294 	{KE_KEY, 0x32, { KEY_MUTE } },
295 	{KE_KEY, 0x33, { KEY_DISPLAYTOGGLE } }, /* LCD on */
296 	{KE_KEY, 0x34, { KEY_DISPLAY_OFF } }, /* LCD off */
297 	{KE_KEY, 0x40, { KEY_PREVIOUSSONG } },
298 	{KE_KEY, 0x41, { KEY_NEXTSONG } },
299 	{KE_KEY, 0x43, { KEY_STOPCD } }, /* Stop/Eject */
300 	{KE_KEY, 0x45, { KEY_PLAYPAUSE } },
301 	{KE_KEY, 0x4c, { KEY_MEDIA } }, /* WMP Key */
302 	{KE_KEY, 0x50, { KEY_EMAIL } },
303 	{KE_KEY, 0x51, { KEY_WWW } },
304 	{KE_KEY, 0x55, { KEY_CALC } },
305 	{KE_IGNORE, 0x57, },  /* Battery mode */
306 	{KE_IGNORE, 0x58, },  /* AC mode */
307 	{KE_KEY, 0x5C, { KEY_SCREENLOCK } },  /* Screenlock */
308 	{KE_KEY, 0x5D, { KEY_WLAN } }, /* WLAN Toggle */
309 	{KE_KEY, 0x5E, { KEY_WLAN } }, /* WLAN Enable */
310 	{KE_KEY, 0x5F, { KEY_WLAN } }, /* WLAN Disable */
311 	{KE_KEY, 0x60, { KEY_TOUCHPAD_ON } },
312 	{KE_KEY, 0x61, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD only */
313 	{KE_KEY, 0x62, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT only */
314 	{KE_KEY, 0x63, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT */
315 	{KE_KEY, 0x64, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV */
316 	{KE_KEY, 0x65, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV */
317 	{KE_KEY, 0x66, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV */
318 	{KE_KEY, 0x67, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV */
319 	{KE_KEY, 0x6A, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad Fn + F9 */
320 	{KE_KEY, 0x6B, { KEY_TOUCHPAD_TOGGLE } }, /* Lock Touchpad */
321 	{KE_KEY, 0x6C, { KEY_SLEEP } }, /* Suspend */
322 	{KE_KEY, 0x6D, { KEY_SLEEP } }, /* Hibernate */
323 	{KE_IGNORE, 0x6E, },  /* Low Battery notification */
324 	{KE_KEY, 0x7D, { KEY_BLUETOOTH } }, /* Bluetooth Enable */
325 	{KE_KEY, 0x7E, { KEY_BLUETOOTH } }, /* Bluetooth Disable */
326 	{KE_KEY, 0x82, { KEY_CAMERA } },
327 	{KE_KEY, 0x88, { KEY_RFKILL  } }, /* Radio Toggle Key */
328 	{KE_KEY, 0x8A, { KEY_PROG1 } }, /* Color enhancement mode */
329 	{KE_KEY, 0x8C, { KEY_SWITCHVIDEOMODE } }, /* SDSP DVI only */
330 	{KE_KEY, 0x8D, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + DVI */
331 	{KE_KEY, 0x8E, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + DVI */
332 	{KE_KEY, 0x8F, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + DVI */
333 	{KE_KEY, 0x90, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + DVI */
334 	{KE_KEY, 0x91, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + DVI */
335 	{KE_KEY, 0x92, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + DVI */
336 	{KE_KEY, 0x93, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + DVI */
337 	{KE_KEY, 0x95, { KEY_MEDIA } },
338 	{KE_KEY, 0x99, { KEY_PHONE } },
339 	{KE_KEY, 0xA0, { KEY_SWITCHVIDEOMODE } }, /* SDSP HDMI only */
340 	{KE_KEY, 0xA1, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + HDMI */
341 	{KE_KEY, 0xA2, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + HDMI */
342 	{KE_KEY, 0xA3, { KEY_SWITCHVIDEOMODE } }, /* SDSP TV + HDMI */
343 	{KE_KEY, 0xA4, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + HDMI */
344 	{KE_KEY, 0xA5, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + TV + HDMI */
345 	{KE_KEY, 0xA6, { KEY_SWITCHVIDEOMODE } }, /* SDSP CRT + TV + HDMI */
346 	{KE_KEY, 0xA7, { KEY_SWITCHVIDEOMODE } }, /* SDSP LCD + CRT + TV + HDMI */
347 	{KE_KEY, 0xB5, { KEY_CALC } },
348 	{KE_KEY, 0xC4, { KEY_KBDILLUMUP } },
349 	{KE_KEY, 0xC5, { KEY_KBDILLUMDOWN } },
350 	{KE_END, 0},
351 };
352 
353 
354 /*
355  * This function evaluates an ACPI method, given an int as parameter, the
356  * method is searched within the scope of the handle, can be NULL. The output
357  * of the method is written is output, which can also be NULL
358  *
359  * returns 0 if write is successful, -1 else.
360  */
361 static int write_acpi_int_ret(acpi_handle handle, const char *method, int val,
362 			      struct acpi_buffer *output)
363 {
364 	struct acpi_object_list params;	/* list of input parameters (an int) */
365 	union acpi_object in_obj;	/* the only param we use */
366 	acpi_status status;
367 
368 	if (!handle)
369 		return -1;
370 
371 	params.count = 1;
372 	params.pointer = &in_obj;
373 	in_obj.type = ACPI_TYPE_INTEGER;
374 	in_obj.integer.value = val;
375 
376 	status = acpi_evaluate_object(handle, (char *)method, &params, output);
377 	if (status == AE_OK)
378 		return 0;
379 	else
380 		return -1;
381 }
382 
383 static int write_acpi_int(acpi_handle handle, const char *method, int val)
384 {
385 	return write_acpi_int_ret(handle, method, val, NULL);
386 }
387 
388 static int acpi_check_handle(acpi_handle handle, const char *method,
389 			     acpi_handle *ret)
390 {
391 	acpi_status status;
392 
393 	if (method == NULL)
394 		return -ENODEV;
395 
396 	if (ret)
397 		status = acpi_get_handle(handle, (char *)method,
398 					 ret);
399 	else {
400 		acpi_handle dummy;
401 
402 		status = acpi_get_handle(handle, (char *)method,
403 					 &dummy);
404 	}
405 
406 	if (status != AE_OK) {
407 		if (ret)
408 			pr_warn("Error finding %s\n", method);
409 		return -ENODEV;
410 	}
411 	return 0;
412 }
413 
414 static bool asus_check_pega_lucid(struct asus_laptop *asus)
415 {
416 	return !strcmp(asus->name, DEVICE_NAME_PEGA) &&
417 	   !acpi_check_handle(asus->handle, METHOD_PEGA_ENABLE, NULL) &&
418 	   !acpi_check_handle(asus->handle, METHOD_PEGA_DISABLE, NULL) &&
419 	   !acpi_check_handle(asus->handle, METHOD_PEGA_READ, NULL);
420 }
421 
422 static int asus_pega_lucid_set(struct asus_laptop *asus, int unit, bool enable)
423 {
424 	char *method = enable ? METHOD_PEGA_ENABLE : METHOD_PEGA_DISABLE;
425 	return write_acpi_int(asus->handle, method, unit);
426 }
427 
428 static int pega_acc_axis(struct asus_laptop *asus, int curr, char *method)
429 {
430 	int i, delta;
431 	unsigned long long val;
432 	for (i = 0; i < PEGA_ACC_RETRIES; i++) {
433 		acpi_evaluate_integer(asus->handle, method, NULL, &val);
434 
435 		/* The output is noisy.  From reading the ASL
436 		 * dissassembly, timeout errors are returned with 1's
437 		 * in the high word, and the lack of locking around
438 		 * thei hi/lo byte reads means that a transition
439 		 * between (for example) -1 and 0 could be read as
440 		 * 0xff00 or 0x00ff. */
441 		delta = abs(curr - (short)val);
442 		if (delta < 128 && !(val & ~0xffff))
443 			break;
444 	}
445 	return clamp_val((short)val, -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP);
446 }
447 
448 static void pega_accel_poll(struct input_dev *input)
449 {
450 	struct device *parent = input->dev.parent;
451 	struct asus_laptop *asus = dev_get_drvdata(parent);
452 
453 	/* In some cases, the very first call to poll causes a
454 	 * recursive fault under the polldev worker.  This is
455 	 * apparently related to very early userspace access to the
456 	 * device, and perhaps a firmware bug. Fake the first report. */
457 	if (!asus->pega_acc_live) {
458 		asus->pega_acc_live = true;
459 		input_report_abs(input, ABS_X, 0);
460 		input_report_abs(input, ABS_Y, 0);
461 		input_report_abs(input, ABS_Z, 0);
462 		input_sync(input);
463 		return;
464 	}
465 
466 	asus->pega_acc_x = pega_acc_axis(asus, asus->pega_acc_x, METHOD_XLRX);
467 	asus->pega_acc_y = pega_acc_axis(asus, asus->pega_acc_y, METHOD_XLRY);
468 	asus->pega_acc_z = pega_acc_axis(asus, asus->pega_acc_z, METHOD_XLRZ);
469 
470 	/* Note transform, convert to "right/up/out" in the native
471 	 * landscape orientation (i.e. the vector is the direction of
472 	 * "real up" in the device's cartiesian coordinates). */
473 	input_report_abs(input, ABS_X, -asus->pega_acc_x);
474 	input_report_abs(input, ABS_Y, -asus->pega_acc_y);
475 	input_report_abs(input, ABS_Z,  asus->pega_acc_z);
476 	input_sync(input);
477 }
478 
479 static void pega_accel_exit(struct asus_laptop *asus)
480 {
481 	if (asus->pega_accel_poll) {
482 		input_unregister_device(asus->pega_accel_poll);
483 		asus->pega_accel_poll = NULL;
484 	}
485 }
486 
487 static int pega_accel_init(struct asus_laptop *asus)
488 {
489 	int err;
490 	struct input_dev *input;
491 
492 	if (!asus->is_pega_lucid)
493 		return -ENODEV;
494 
495 	if (acpi_check_handle(asus->handle, METHOD_XLRX, NULL) ||
496 	    acpi_check_handle(asus->handle, METHOD_XLRY, NULL) ||
497 	    acpi_check_handle(asus->handle, METHOD_XLRZ, NULL))
498 		return -ENODEV;
499 
500 	input = input_allocate_device();
501 	if (!input)
502 		return -ENOMEM;
503 
504 	input->name = PEGA_ACCEL_DESC;
505 	input->phys = PEGA_ACCEL_NAME "/input0";
506 	input->dev.parent = &asus->platform_device->dev;
507 	input->id.bustype = BUS_HOST;
508 
509 	input_set_abs_params(input, ABS_X,
510 			     -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
511 	input_set_abs_params(input, ABS_Y,
512 			     -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
513 	input_set_abs_params(input, ABS_Z,
514 			     -PEGA_ACC_CLAMP, PEGA_ACC_CLAMP, 0, 0);
515 
516 	err = input_setup_polling(input, pega_accel_poll);
517 	if (err)
518 		goto exit;
519 
520 	input_set_poll_interval(input, 125);
521 	input_set_min_poll_interval(input, 50);
522 	input_set_max_poll_interval(input, 2000);
523 
524 	err = input_register_device(input);
525 	if (err)
526 		goto exit;
527 
528 	asus->pega_accel_poll = input;
529 	return 0;
530 
531 exit:
532 	input_free_device(input);
533 	return err;
534 }
535 
536 /* Generic LED function */
537 static int asus_led_set(struct asus_laptop *asus, const char *method,
538 			 int value)
539 {
540 	if (!strcmp(method, METHOD_MLED))
541 		value = !value;
542 	else if (!strcmp(method, METHOD_GLED))
543 		value = !value + 1;
544 	else
545 		value = !!value;
546 
547 	return write_acpi_int(asus->handle, method, value);
548 }
549 
550 /*
551  * LEDs
552  */
553 /* /sys/class/led handlers */
554 static void asus_led_cdev_set(struct led_classdev *led_cdev,
555 			 enum led_brightness value)
556 {
557 	struct asus_led *led = container_of(led_cdev, struct asus_led, led);
558 	struct asus_laptop *asus = led->asus;
559 
560 	led->wk = !!value;
561 	queue_work(asus->led_workqueue, &led->work);
562 }
563 
564 static void asus_led_cdev_update(struct work_struct *work)
565 {
566 	struct asus_led *led = container_of(work, struct asus_led, work);
567 	struct asus_laptop *asus = led->asus;
568 
569 	asus_led_set(asus, led->method, led->wk);
570 }
571 
572 static enum led_brightness asus_led_cdev_get(struct led_classdev *led_cdev)
573 {
574 	return led_cdev->brightness;
575 }
576 
577 /*
578  * Keyboard backlight (also a LED)
579  */
580 static int asus_kled_lvl(struct asus_laptop *asus)
581 {
582 	unsigned long long kblv;
583 	struct acpi_object_list params;
584 	union acpi_object in_obj;
585 	acpi_status rv;
586 
587 	params.count = 1;
588 	params.pointer = &in_obj;
589 	in_obj.type = ACPI_TYPE_INTEGER;
590 	in_obj.integer.value = 2;
591 
592 	rv = acpi_evaluate_integer(asus->handle, METHOD_KBD_LIGHT_GET,
593 				   &params, &kblv);
594 	if (ACPI_FAILURE(rv)) {
595 		pr_warn("Error reading kled level\n");
596 		return -ENODEV;
597 	}
598 	return kblv;
599 }
600 
601 static int asus_kled_set(struct asus_laptop *asus, int kblv)
602 {
603 	if (kblv > 0)
604 		kblv = (1 << 7) | (kblv & 0x7F);
605 	else
606 		kblv = 0;
607 
608 	if (write_acpi_int(asus->handle, METHOD_KBD_LIGHT_SET, kblv)) {
609 		pr_warn("Keyboard LED display write failed\n");
610 		return -EINVAL;
611 	}
612 	return 0;
613 }
614 
615 static void asus_kled_cdev_set(struct led_classdev *led_cdev,
616 			      enum led_brightness value)
617 {
618 	struct asus_led *led = container_of(led_cdev, struct asus_led, led);
619 	struct asus_laptop *asus = led->asus;
620 
621 	led->wk = value;
622 	queue_work(asus->led_workqueue, &led->work);
623 }
624 
625 static void asus_kled_cdev_update(struct work_struct *work)
626 {
627 	struct asus_led *led = container_of(work, struct asus_led, work);
628 	struct asus_laptop *asus = led->asus;
629 
630 	asus_kled_set(asus, led->wk);
631 }
632 
633 static enum led_brightness asus_kled_cdev_get(struct led_classdev *led_cdev)
634 {
635 	struct asus_led *led = container_of(led_cdev, struct asus_led, led);
636 	struct asus_laptop *asus = led->asus;
637 
638 	return asus_kled_lvl(asus);
639 }
640 
641 static void asus_led_exit(struct asus_laptop *asus)
642 {
643 	if (!IS_ERR_OR_NULL(asus->wled.led.dev))
644 		led_classdev_unregister(&asus->wled.led);
645 	if (!IS_ERR_OR_NULL(asus->bled.led.dev))
646 		led_classdev_unregister(&asus->bled.led);
647 	if (!IS_ERR_OR_NULL(asus->mled.led.dev))
648 		led_classdev_unregister(&asus->mled.led);
649 	if (!IS_ERR_OR_NULL(asus->tled.led.dev))
650 		led_classdev_unregister(&asus->tled.led);
651 	if (!IS_ERR_OR_NULL(asus->pled.led.dev))
652 		led_classdev_unregister(&asus->pled.led);
653 	if (!IS_ERR_OR_NULL(asus->rled.led.dev))
654 		led_classdev_unregister(&asus->rled.led);
655 	if (!IS_ERR_OR_NULL(asus->gled.led.dev))
656 		led_classdev_unregister(&asus->gled.led);
657 	if (!IS_ERR_OR_NULL(asus->kled.led.dev))
658 		led_classdev_unregister(&asus->kled.led);
659 	if (asus->led_workqueue) {
660 		destroy_workqueue(asus->led_workqueue);
661 		asus->led_workqueue = NULL;
662 	}
663 }
664 
665 /*  Ugly macro, need to fix that later */
666 static int asus_led_register(struct asus_laptop *asus,
667 			     struct asus_led *led,
668 			     const char *name, const char *method)
669 {
670 	struct led_classdev *led_cdev = &led->led;
671 
672 	if (!method || acpi_check_handle(asus->handle, method, NULL))
673 		return 0; /* Led not present */
674 
675 	led->asus = asus;
676 	led->method = method;
677 
678 	INIT_WORK(&led->work, asus_led_cdev_update);
679 	led_cdev->name = name;
680 	led_cdev->brightness_set = asus_led_cdev_set;
681 	led_cdev->brightness_get = asus_led_cdev_get;
682 	led_cdev->max_brightness = 1;
683 	return led_classdev_register(&asus->platform_device->dev, led_cdev);
684 }
685 
686 static int asus_led_init(struct asus_laptop *asus)
687 {
688 	int r = 0;
689 
690 	/*
691 	 * The Pegatron Lucid has no physical leds, but all methods are
692 	 * available in the DSDT...
693 	 */
694 	if (asus->is_pega_lucid)
695 		return 0;
696 
697 	/*
698 	 * Functions that actually update the LED's are called from a
699 	 * workqueue. By doing this as separate work rather than when the LED
700 	 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
701 	 * potentially bad time, such as a timer interrupt.
702 	 */
703 	asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
704 	if (!asus->led_workqueue)
705 		return -ENOMEM;
706 
707 	if (asus->wled_type == TYPE_LED)
708 		r = asus_led_register(asus, &asus->wled, "asus::wlan",
709 				      METHOD_WLAN);
710 	if (r)
711 		goto error;
712 	if (asus->bled_type == TYPE_LED)
713 		r = asus_led_register(asus, &asus->bled, "asus::bluetooth",
714 				      METHOD_BLUETOOTH);
715 	if (r)
716 		goto error;
717 	r = asus_led_register(asus, &asus->mled, "asus::mail", METHOD_MLED);
718 	if (r)
719 		goto error;
720 	r = asus_led_register(asus, &asus->tled, "asus::touchpad", METHOD_TLED);
721 	if (r)
722 		goto error;
723 	r = asus_led_register(asus, &asus->rled, "asus::record", METHOD_RLED);
724 	if (r)
725 		goto error;
726 	r = asus_led_register(asus, &asus->pled, "asus::phone", METHOD_PLED);
727 	if (r)
728 		goto error;
729 	r = asus_led_register(asus, &asus->gled, "asus::gaming", METHOD_GLED);
730 	if (r)
731 		goto error;
732 	if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL) &&
733 	    !acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_GET, NULL)) {
734 		struct asus_led *led = &asus->kled;
735 		struct led_classdev *cdev = &led->led;
736 
737 		led->asus = asus;
738 
739 		INIT_WORK(&led->work, asus_kled_cdev_update);
740 		cdev->name = "asus::kbd_backlight";
741 		cdev->brightness_set = asus_kled_cdev_set;
742 		cdev->brightness_get = asus_kled_cdev_get;
743 		cdev->max_brightness = 3;
744 		r = led_classdev_register(&asus->platform_device->dev, cdev);
745 	}
746 error:
747 	if (r)
748 		asus_led_exit(asus);
749 	return r;
750 }
751 
752 /*
753  * Backlight device
754  */
755 static int asus_read_brightness(struct backlight_device *bd)
756 {
757 	struct asus_laptop *asus = bl_get_data(bd);
758 	unsigned long long value;
759 	acpi_status rv;
760 
761 	rv = acpi_evaluate_integer(asus->handle, METHOD_BRIGHTNESS_GET,
762 				   NULL, &value);
763 	if (ACPI_FAILURE(rv)) {
764 		pr_warn("Error reading brightness\n");
765 		return 0;
766 	}
767 
768 	return value;
769 }
770 
771 static int asus_set_brightness(struct backlight_device *bd, int value)
772 {
773 	struct asus_laptop *asus = bl_get_data(bd);
774 
775 	if (write_acpi_int(asus->handle, METHOD_BRIGHTNESS_SET, value)) {
776 		pr_warn("Error changing brightness\n");
777 		return -EIO;
778 	}
779 	return 0;
780 }
781 
782 static int update_bl_status(struct backlight_device *bd)
783 {
784 	int value = bd->props.brightness;
785 
786 	return asus_set_brightness(bd, value);
787 }
788 
789 static const struct backlight_ops asusbl_ops = {
790 	.get_brightness = asus_read_brightness,
791 	.update_status = update_bl_status,
792 };
793 
794 static int asus_backlight_notify(struct asus_laptop *asus)
795 {
796 	struct backlight_device *bd = asus->backlight_device;
797 	int old = bd->props.brightness;
798 
799 	backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
800 
801 	return old;
802 }
803 
804 static int asus_backlight_init(struct asus_laptop *asus)
805 {
806 	struct backlight_device *bd;
807 	struct backlight_properties props;
808 
809 	if (acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_GET, NULL) ||
810 	    acpi_check_handle(asus->handle, METHOD_BRIGHTNESS_SET, NULL))
811 		return 0;
812 
813 	memset(&props, 0, sizeof(struct backlight_properties));
814 	props.max_brightness = 15;
815 	props.type = BACKLIGHT_PLATFORM;
816 
817 	bd = backlight_device_register(ASUS_LAPTOP_FILE,
818 				       &asus->platform_device->dev, asus,
819 				       &asusbl_ops, &props);
820 	if (IS_ERR(bd)) {
821 		pr_err("Could not register asus backlight device\n");
822 		asus->backlight_device = NULL;
823 		return PTR_ERR(bd);
824 	}
825 
826 	asus->backlight_device = bd;
827 	bd->props.brightness = asus_read_brightness(bd);
828 	bd->props.power = FB_BLANK_UNBLANK;
829 	backlight_update_status(bd);
830 	return 0;
831 }
832 
833 static void asus_backlight_exit(struct asus_laptop *asus)
834 {
835 	backlight_device_unregister(asus->backlight_device);
836 	asus->backlight_device = NULL;
837 }
838 
839 /*
840  * Platform device handlers
841  */
842 
843 /*
844  * We write our info in page, we begin at offset off and cannot write more
845  * than count bytes. We set eof to 1 if we handle those 2 values. We return the
846  * number of bytes written in page
847  */
848 static ssize_t infos_show(struct device *dev, struct device_attribute *attr,
849 			  char *page)
850 {
851 	struct asus_laptop *asus = dev_get_drvdata(dev);
852 	int len = 0;
853 	unsigned long long temp;
854 	char buf[16];		/* enough for all info */
855 	acpi_status rv;
856 
857 	/*
858 	 * We use the easy way, we don't care of off and count,
859 	 * so we don't set eof to 1
860 	 */
861 
862 	len += sprintf(page, ASUS_LAPTOP_NAME " " ASUS_LAPTOP_VERSION "\n");
863 	len += sprintf(page + len, "Model reference    : %s\n", asus->name);
864 	/*
865 	 * The SFUN method probably allows the original driver to get the list
866 	 * of features supported by a given model. For now, 0x0100 or 0x0800
867 	 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
868 	 * The significance of others is yet to be found.
869 	 */
870 	rv = acpi_evaluate_integer(asus->handle, "SFUN", NULL, &temp);
871 	if (!ACPI_FAILURE(rv))
872 		len += sprintf(page + len, "SFUN value         : %#x\n",
873 			       (uint) temp);
874 	/*
875 	 * The HWRS method return informations about the hardware.
876 	 * 0x80 bit is for WLAN, 0x100 for Bluetooth.
877 	 * 0x40 for WWAN, 0x10 for WIMAX.
878 	 * The significance of others is yet to be found.
879 	 * We don't currently use this for device detection, and it
880 	 * takes several seconds to run on some systems.
881 	 */
882 	rv = acpi_evaluate_integer(asus->handle, "HWRS", NULL, &temp);
883 	if (!ACPI_FAILURE(rv))
884 		len += sprintf(page + len, "HWRS value         : %#x\n",
885 			       (uint) temp);
886 	/*
887 	 * Another value for userspace: the ASYM method returns 0x02 for
888 	 * battery low and 0x04 for battery critical, its readings tend to be
889 	 * more accurate than those provided by _BST.
890 	 * Note: since not all the laptops provide this method, errors are
891 	 * silently ignored.
892 	 */
893 	rv = acpi_evaluate_integer(asus->handle, "ASYM", NULL, &temp);
894 	if (!ACPI_FAILURE(rv))
895 		len += sprintf(page + len, "ASYM value         : %#x\n",
896 			       (uint) temp);
897 	if (asus->dsdt_info) {
898 		snprintf(buf, 16, "%d", asus->dsdt_info->length);
899 		len += sprintf(page + len, "DSDT length        : %s\n", buf);
900 		snprintf(buf, 16, "%d", asus->dsdt_info->checksum);
901 		len += sprintf(page + len, "DSDT checksum      : %s\n", buf);
902 		snprintf(buf, 16, "%d", asus->dsdt_info->revision);
903 		len += sprintf(page + len, "DSDT revision      : %s\n", buf);
904 		snprintf(buf, 7, "%s", asus->dsdt_info->oem_id);
905 		len += sprintf(page + len, "OEM id             : %s\n", buf);
906 		snprintf(buf, 9, "%s", asus->dsdt_info->oem_table_id);
907 		len += sprintf(page + len, "OEM table id       : %s\n", buf);
908 		snprintf(buf, 16, "%x", asus->dsdt_info->oem_revision);
909 		len += sprintf(page + len, "OEM revision       : 0x%s\n", buf);
910 		snprintf(buf, 5, "%s", asus->dsdt_info->asl_compiler_id);
911 		len += sprintf(page + len, "ASL comp vendor id : %s\n", buf);
912 		snprintf(buf, 16, "%x", asus->dsdt_info->asl_compiler_revision);
913 		len += sprintf(page + len, "ASL comp revision  : 0x%s\n", buf);
914 	}
915 
916 	return len;
917 }
918 static DEVICE_ATTR_RO(infos);
919 
920 static ssize_t sysfs_acpi_set(struct asus_laptop *asus,
921 			      const char *buf, size_t count,
922 			      const char *method)
923 {
924 	int rv, value;
925 
926 	rv = kstrtoint(buf, 0, &value);
927 	if (rv < 0)
928 		return rv;
929 
930 	if (write_acpi_int(asus->handle, method, value))
931 		return -ENODEV;
932 	return count;
933 }
934 
935 /*
936  * LEDD display
937  */
938 static ssize_t ledd_show(struct device *dev, struct device_attribute *attr,
939 			 char *buf)
940 {
941 	struct asus_laptop *asus = dev_get_drvdata(dev);
942 
943 	return sprintf(buf, "0x%08x\n", asus->ledd_status);
944 }
945 
946 static ssize_t ledd_store(struct device *dev, struct device_attribute *attr,
947 			  const char *buf, size_t count)
948 {
949 	struct asus_laptop *asus = dev_get_drvdata(dev);
950 	int rv, value;
951 
952 	rv = kstrtoint(buf, 0, &value);
953 	if (rv < 0)
954 		return rv;
955 
956 	if (write_acpi_int(asus->handle, METHOD_LEDD, value)) {
957 		pr_warn("LED display write failed\n");
958 		return -ENODEV;
959 	}
960 
961 	asus->ledd_status = (u32) value;
962 	return count;
963 }
964 static DEVICE_ATTR_RW(ledd);
965 
966 /*
967  * Wireless
968  */
969 static int asus_wireless_status(struct asus_laptop *asus, int mask)
970 {
971 	unsigned long long status;
972 	acpi_status rv = AE_OK;
973 
974 	if (!asus->have_rsts)
975 		return (asus->wireless_status & mask) ? 1 : 0;
976 
977 	rv = acpi_evaluate_integer(asus->handle, METHOD_WL_STATUS,
978 				   NULL, &status);
979 	if (ACPI_FAILURE(rv)) {
980 		pr_warn("Error reading Wireless status\n");
981 		return -EINVAL;
982 	}
983 	return !!(status & mask);
984 }
985 
986 /*
987  * WLAN
988  */
989 static int asus_wlan_set(struct asus_laptop *asus, int status)
990 {
991 	if (write_acpi_int(asus->handle, METHOD_WLAN, !!status)) {
992 		pr_warn("Error setting wlan status to %d\n", status);
993 		return -EIO;
994 	}
995 	return 0;
996 }
997 
998 static ssize_t wlan_show(struct device *dev, struct device_attribute *attr,
999 			 char *buf)
1000 {
1001 	struct asus_laptop *asus = dev_get_drvdata(dev);
1002 
1003 	return sprintf(buf, "%d\n", asus_wireless_status(asus, WL_RSTS));
1004 }
1005 
1006 static ssize_t wlan_store(struct device *dev, struct device_attribute *attr,
1007 			  const char *buf, size_t count)
1008 {
1009 	struct asus_laptop *asus = dev_get_drvdata(dev);
1010 
1011 	return sysfs_acpi_set(asus, buf, count, METHOD_WLAN);
1012 }
1013 static DEVICE_ATTR_RW(wlan);
1014 
1015 /*e
1016  * Bluetooth
1017  */
1018 static int asus_bluetooth_set(struct asus_laptop *asus, int status)
1019 {
1020 	if (write_acpi_int(asus->handle, METHOD_BLUETOOTH, !!status)) {
1021 		pr_warn("Error setting bluetooth status to %d\n", status);
1022 		return -EIO;
1023 	}
1024 	return 0;
1025 }
1026 
1027 static ssize_t bluetooth_show(struct device *dev, struct device_attribute *attr,
1028 			      char *buf)
1029 {
1030 	struct asus_laptop *asus = dev_get_drvdata(dev);
1031 
1032 	return sprintf(buf, "%d\n", asus_wireless_status(asus, BT_RSTS));
1033 }
1034 
1035 static ssize_t bluetooth_store(struct device *dev,
1036 			       struct device_attribute *attr, const char *buf,
1037 			       size_t count)
1038 {
1039 	struct asus_laptop *asus = dev_get_drvdata(dev);
1040 
1041 	return sysfs_acpi_set(asus, buf, count, METHOD_BLUETOOTH);
1042 }
1043 static DEVICE_ATTR_RW(bluetooth);
1044 
1045 /*
1046  * Wimax
1047  */
1048 static int asus_wimax_set(struct asus_laptop *asus, int status)
1049 {
1050 	if (write_acpi_int(asus->handle, METHOD_WIMAX, !!status)) {
1051 		pr_warn("Error setting wimax status to %d\n", status);
1052 		return -EIO;
1053 	}
1054 	return 0;
1055 }
1056 
1057 static ssize_t wimax_show(struct device *dev, struct device_attribute *attr,
1058 			  char *buf)
1059 {
1060 	struct asus_laptop *asus = dev_get_drvdata(dev);
1061 
1062 	return sprintf(buf, "%d\n", asus_wireless_status(asus, WM_RSTS));
1063 }
1064 
1065 static ssize_t wimax_store(struct device *dev, struct device_attribute *attr,
1066 			   const char *buf, size_t count)
1067 {
1068 	struct asus_laptop *asus = dev_get_drvdata(dev);
1069 
1070 	return sysfs_acpi_set(asus, buf, count, METHOD_WIMAX);
1071 }
1072 static DEVICE_ATTR_RW(wimax);
1073 
1074 /*
1075  * Wwan
1076  */
1077 static int asus_wwan_set(struct asus_laptop *asus, int status)
1078 {
1079 	if (write_acpi_int(asus->handle, METHOD_WWAN, !!status)) {
1080 		pr_warn("Error setting wwan status to %d\n", status);
1081 		return -EIO;
1082 	}
1083 	return 0;
1084 }
1085 
1086 static ssize_t wwan_show(struct device *dev, struct device_attribute *attr,
1087 			 char *buf)
1088 {
1089 	struct asus_laptop *asus = dev_get_drvdata(dev);
1090 
1091 	return sprintf(buf, "%d\n", asus_wireless_status(asus, WW_RSTS));
1092 }
1093 
1094 static ssize_t wwan_store(struct device *dev, struct device_attribute *attr,
1095 			  const char *buf, size_t count)
1096 {
1097 	struct asus_laptop *asus = dev_get_drvdata(dev);
1098 
1099 	return sysfs_acpi_set(asus, buf, count, METHOD_WWAN);
1100 }
1101 static DEVICE_ATTR_RW(wwan);
1102 
1103 /*
1104  * Display
1105  */
1106 static void asus_set_display(struct asus_laptop *asus, int value)
1107 {
1108 	/* no sanity check needed for now */
1109 	if (write_acpi_int(asus->handle, METHOD_SWITCH_DISPLAY, value))
1110 		pr_warn("Error setting display\n");
1111 	return;
1112 }
1113 
1114 /*
1115  * Experimental support for display switching. As of now: 1 should activate
1116  * the LCD output, 2 should do for CRT, 4 for TV-Out and 8 for DVI.
1117  * Any combination (bitwise) of these will suffice. I never actually tested 4
1118  * displays hooked up simultaneously, so be warned. See the acpi4asus README
1119  * for more info.
1120  */
1121 static ssize_t display_store(struct device *dev, struct device_attribute *attr,
1122 			     const char *buf, size_t count)
1123 {
1124 	struct asus_laptop *asus = dev_get_drvdata(dev);
1125 	int rv, value;
1126 
1127 	rv = kstrtoint(buf, 0, &value);
1128 	if (rv < 0)
1129 		return rv;
1130 
1131 	asus_set_display(asus, value);
1132 	return count;
1133 }
1134 static DEVICE_ATTR_WO(display);
1135 
1136 /*
1137  * Light Sens
1138  */
1139 static void asus_als_switch(struct asus_laptop *asus, int value)
1140 {
1141 	int ret;
1142 
1143 	if (asus->is_pega_lucid) {
1144 		ret = asus_pega_lucid_set(asus, PEGA_ALS, value);
1145 		if (!ret)
1146 			ret = asus_pega_lucid_set(asus, PEGA_ALS_POWER, value);
1147 	} else {
1148 		ret = write_acpi_int(asus->handle, METHOD_ALS_CONTROL, value);
1149 	}
1150 	if (ret)
1151 		pr_warn("Error setting light sensor switch\n");
1152 
1153 	asus->light_switch = value;
1154 }
1155 
1156 static ssize_t ls_switch_show(struct device *dev, struct device_attribute *attr,
1157 			      char *buf)
1158 {
1159 	struct asus_laptop *asus = dev_get_drvdata(dev);
1160 
1161 	return sprintf(buf, "%d\n", asus->light_switch);
1162 }
1163 
1164 static ssize_t ls_switch_store(struct device *dev,
1165 			       struct device_attribute *attr, const char *buf,
1166 			       size_t count)
1167 {
1168 	struct asus_laptop *asus = dev_get_drvdata(dev);
1169 	int rv, value;
1170 
1171 	rv = kstrtoint(buf, 0, &value);
1172 	if (rv < 0)
1173 		return rv;
1174 
1175 	asus_als_switch(asus, value ? 1 : 0);
1176 	return count;
1177 }
1178 static DEVICE_ATTR_RW(ls_switch);
1179 
1180 static void asus_als_level(struct asus_laptop *asus, int value)
1181 {
1182 	if (write_acpi_int(asus->handle, METHOD_ALS_LEVEL, value))
1183 		pr_warn("Error setting light sensor level\n");
1184 	asus->light_level = value;
1185 }
1186 
1187 static ssize_t ls_level_show(struct device *dev, struct device_attribute *attr,
1188 			     char *buf)
1189 {
1190 	struct asus_laptop *asus = dev_get_drvdata(dev);
1191 
1192 	return sprintf(buf, "%d\n", asus->light_level);
1193 }
1194 
1195 static ssize_t ls_level_store(struct device *dev, struct device_attribute *attr,
1196 			      const char *buf, size_t count)
1197 {
1198 	struct asus_laptop *asus = dev_get_drvdata(dev);
1199 	int rv, value;
1200 
1201 	rv = kstrtoint(buf, 0, &value);
1202 	if (rv < 0)
1203 		return rv;
1204 
1205 	value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
1206 	/* 0 <= value <= 15 */
1207 	asus_als_level(asus, value);
1208 
1209 	return count;
1210 }
1211 static DEVICE_ATTR_RW(ls_level);
1212 
1213 static int pega_int_read(struct asus_laptop *asus, int arg, int *result)
1214 {
1215 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1216 	int err = write_acpi_int_ret(asus->handle, METHOD_PEGA_READ, arg,
1217 				     &buffer);
1218 	if (!err) {
1219 		union acpi_object *obj = buffer.pointer;
1220 		if (obj && obj->type == ACPI_TYPE_INTEGER)
1221 			*result = obj->integer.value;
1222 		else
1223 			err = -EIO;
1224 	}
1225 	return err;
1226 }
1227 
1228 static ssize_t ls_value_show(struct device *dev, struct device_attribute *attr,
1229 			     char *buf)
1230 {
1231 	struct asus_laptop *asus = dev_get_drvdata(dev);
1232 	int err, hi, lo;
1233 
1234 	err = pega_int_read(asus, PEGA_READ_ALS_H, &hi);
1235 	if (!err)
1236 		err = pega_int_read(asus, PEGA_READ_ALS_L, &lo);
1237 	if (!err)
1238 		return sprintf(buf, "%d\n", 10 * hi + lo);
1239 	return err;
1240 }
1241 static DEVICE_ATTR_RO(ls_value);
1242 
1243 /*
1244  * GPS
1245  */
1246 static int asus_gps_status(struct asus_laptop *asus)
1247 {
1248 	unsigned long long status;
1249 	acpi_status rv;
1250 
1251 	rv = acpi_evaluate_integer(asus->handle, METHOD_GPS_STATUS,
1252 				   NULL, &status);
1253 	if (ACPI_FAILURE(rv)) {
1254 		pr_warn("Error reading GPS status\n");
1255 		return -ENODEV;
1256 	}
1257 	return !!status;
1258 }
1259 
1260 static int asus_gps_switch(struct asus_laptop *asus, int status)
1261 {
1262 	const char *meth = status ? METHOD_GPS_ON : METHOD_GPS_OFF;
1263 
1264 	if (write_acpi_int(asus->handle, meth, 0x02))
1265 		return -ENODEV;
1266 	return 0;
1267 }
1268 
1269 static ssize_t gps_show(struct device *dev, struct device_attribute *attr,
1270 			char *buf)
1271 {
1272 	struct asus_laptop *asus = dev_get_drvdata(dev);
1273 
1274 	return sprintf(buf, "%d\n", asus_gps_status(asus));
1275 }
1276 
1277 static ssize_t gps_store(struct device *dev, struct device_attribute *attr,
1278 			 const char *buf, size_t count)
1279 {
1280 	struct asus_laptop *asus = dev_get_drvdata(dev);
1281 	int rv, value;
1282 	int ret;
1283 
1284 	rv = kstrtoint(buf, 0, &value);
1285 	if (rv < 0)
1286 		return rv;
1287 	ret = asus_gps_switch(asus, !!value);
1288 	if (ret)
1289 		return ret;
1290 	rfkill_set_sw_state(asus->gps.rfkill, !value);
1291 	return count;
1292 }
1293 static DEVICE_ATTR_RW(gps);
1294 
1295 /*
1296  * rfkill
1297  */
1298 static int asus_gps_rfkill_set(void *data, bool blocked)
1299 {
1300 	struct asus_laptop *asus = data;
1301 
1302 	return asus_gps_switch(asus, !blocked);
1303 }
1304 
1305 static const struct rfkill_ops asus_gps_rfkill_ops = {
1306 	.set_block = asus_gps_rfkill_set,
1307 };
1308 
1309 static int asus_rfkill_set(void *data, bool blocked)
1310 {
1311 	struct asus_rfkill *rfk = data;
1312 	struct asus_laptop *asus = rfk->asus;
1313 
1314 	if (rfk->control_id == WL_RSTS)
1315 		return asus_wlan_set(asus, !blocked);
1316 	else if (rfk->control_id == BT_RSTS)
1317 		return asus_bluetooth_set(asus, !blocked);
1318 	else if (rfk->control_id == WM_RSTS)
1319 		return asus_wimax_set(asus, !blocked);
1320 	else if (rfk->control_id == WW_RSTS)
1321 		return asus_wwan_set(asus, !blocked);
1322 
1323 	return -EINVAL;
1324 }
1325 
1326 static const struct rfkill_ops asus_rfkill_ops = {
1327 	.set_block = asus_rfkill_set,
1328 };
1329 
1330 static void asus_rfkill_terminate(struct asus_rfkill *rfk)
1331 {
1332 	if (!rfk->rfkill)
1333 		return ;
1334 
1335 	rfkill_unregister(rfk->rfkill);
1336 	rfkill_destroy(rfk->rfkill);
1337 	rfk->rfkill = NULL;
1338 }
1339 
1340 static void asus_rfkill_exit(struct asus_laptop *asus)
1341 {
1342 	asus_rfkill_terminate(&asus->wwan);
1343 	asus_rfkill_terminate(&asus->bluetooth);
1344 	asus_rfkill_terminate(&asus->wlan);
1345 	asus_rfkill_terminate(&asus->gps);
1346 }
1347 
1348 static int asus_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1349 			     const char *name, int control_id, int type,
1350 			     const struct rfkill_ops *ops)
1351 {
1352 	int result;
1353 
1354 	rfk->control_id = control_id;
1355 	rfk->asus = asus;
1356 	rfk->rfkill = rfkill_alloc(name, &asus->platform_device->dev,
1357 				   type, ops, rfk);
1358 	if (!rfk->rfkill)
1359 		return -EINVAL;
1360 
1361 	result = rfkill_register(rfk->rfkill);
1362 	if (result) {
1363 		rfkill_destroy(rfk->rfkill);
1364 		rfk->rfkill = NULL;
1365 	}
1366 
1367 	return result;
1368 }
1369 
1370 static int asus_rfkill_init(struct asus_laptop *asus)
1371 {
1372 	int result = 0;
1373 
1374 	if (asus->is_pega_lucid)
1375 		return -ENODEV;
1376 
1377 	if (!acpi_check_handle(asus->handle, METHOD_GPS_ON, NULL) &&
1378 	    !acpi_check_handle(asus->handle, METHOD_GPS_OFF, NULL) &&
1379 	    !acpi_check_handle(asus->handle, METHOD_GPS_STATUS, NULL))
1380 		result = asus_rfkill_setup(asus, &asus->gps, "asus-gps",
1381 					   -1, RFKILL_TYPE_GPS,
1382 					   &asus_gps_rfkill_ops);
1383 	if (result)
1384 		goto exit;
1385 
1386 
1387 	if (!acpi_check_handle(asus->handle, METHOD_WLAN, NULL) &&
1388 	    asus->wled_type == TYPE_RFKILL)
1389 		result = asus_rfkill_setup(asus, &asus->wlan, "asus-wlan",
1390 					   WL_RSTS, RFKILL_TYPE_WLAN,
1391 					   &asus_rfkill_ops);
1392 	if (result)
1393 		goto exit;
1394 
1395 	if (!acpi_check_handle(asus->handle, METHOD_BLUETOOTH, NULL) &&
1396 	    asus->bled_type == TYPE_RFKILL)
1397 		result = asus_rfkill_setup(asus, &asus->bluetooth,
1398 					   "asus-bluetooth", BT_RSTS,
1399 					   RFKILL_TYPE_BLUETOOTH,
1400 					   &asus_rfkill_ops);
1401 	if (result)
1402 		goto exit;
1403 
1404 	if (!acpi_check_handle(asus->handle, METHOD_WWAN, NULL))
1405 		result = asus_rfkill_setup(asus, &asus->wwan, "asus-wwan",
1406 					   WW_RSTS, RFKILL_TYPE_WWAN,
1407 					   &asus_rfkill_ops);
1408 	if (result)
1409 		goto exit;
1410 
1411 	if (!acpi_check_handle(asus->handle, METHOD_WIMAX, NULL))
1412 		result = asus_rfkill_setup(asus, &asus->wimax, "asus-wimax",
1413 					   WM_RSTS, RFKILL_TYPE_WIMAX,
1414 					   &asus_rfkill_ops);
1415 	if (result)
1416 		goto exit;
1417 
1418 exit:
1419 	if (result)
1420 		asus_rfkill_exit(asus);
1421 
1422 	return result;
1423 }
1424 
1425 static int pega_rfkill_set(void *data, bool blocked)
1426 {
1427 	struct asus_rfkill *rfk = data;
1428 
1429 	int ret = asus_pega_lucid_set(rfk->asus, rfk->control_id, !blocked);
1430 	return ret;
1431 }
1432 
1433 static const struct rfkill_ops pega_rfkill_ops = {
1434 	.set_block = pega_rfkill_set,
1435 };
1436 
1437 static int pega_rfkill_setup(struct asus_laptop *asus, struct asus_rfkill *rfk,
1438 			     const char *name, int controlid, int rfkill_type)
1439 {
1440 	return asus_rfkill_setup(asus, rfk, name, controlid, rfkill_type,
1441 				 &pega_rfkill_ops);
1442 }
1443 
1444 static int pega_rfkill_init(struct asus_laptop *asus)
1445 {
1446 	int ret = 0;
1447 
1448 	if(!asus->is_pega_lucid)
1449 		return -ENODEV;
1450 
1451 	ret = pega_rfkill_setup(asus, &asus->wlan, "pega-wlan",
1452 				PEGA_WLAN, RFKILL_TYPE_WLAN);
1453 	if(ret)
1454 		goto exit;
1455 
1456 	ret = pega_rfkill_setup(asus, &asus->bluetooth, "pega-bt",
1457 				PEGA_BLUETOOTH, RFKILL_TYPE_BLUETOOTH);
1458 	if(ret)
1459 		goto exit;
1460 
1461 	ret = pega_rfkill_setup(asus, &asus->wwan, "pega-wwan",
1462 				PEGA_WWAN, RFKILL_TYPE_WWAN);
1463 
1464 exit:
1465 	if (ret)
1466 		asus_rfkill_exit(asus);
1467 
1468 	return ret;
1469 }
1470 
1471 /*
1472  * Input device (i.e. hotkeys)
1473  */
1474 static void asus_input_notify(struct asus_laptop *asus, int event)
1475 {
1476 	if (!asus->inputdev)
1477 		return ;
1478 	if (!sparse_keymap_report_event(asus->inputdev, event, 1, true))
1479 		pr_info("Unknown key %x pressed\n", event);
1480 }
1481 
1482 static int asus_input_init(struct asus_laptop *asus)
1483 {
1484 	struct input_dev *input;
1485 	int error;
1486 
1487 	input = input_allocate_device();
1488 	if (!input)
1489 		return -ENOMEM;
1490 
1491 	input->name = "Asus Laptop extra buttons";
1492 	input->phys = ASUS_LAPTOP_FILE "/input0";
1493 	input->id.bustype = BUS_HOST;
1494 	input->dev.parent = &asus->platform_device->dev;
1495 
1496 	error = sparse_keymap_setup(input, asus_keymap, NULL);
1497 	if (error) {
1498 		pr_err("Unable to setup input device keymap\n");
1499 		goto err_free_dev;
1500 	}
1501 	error = input_register_device(input);
1502 	if (error) {
1503 		pr_warn("Unable to register input device\n");
1504 		goto err_free_dev;
1505 	}
1506 
1507 	asus->inputdev = input;
1508 	return 0;
1509 
1510 err_free_dev:
1511 	input_free_device(input);
1512 	return error;
1513 }
1514 
1515 static void asus_input_exit(struct asus_laptop *asus)
1516 {
1517 	if (asus->inputdev)
1518 		input_unregister_device(asus->inputdev);
1519 	asus->inputdev = NULL;
1520 }
1521 
1522 /*
1523  * ACPI driver
1524  */
1525 static void asus_acpi_notify(struct acpi_device *device, u32 event)
1526 {
1527 	struct asus_laptop *asus = acpi_driver_data(device);
1528 	u16 count;
1529 
1530 	/* TODO Find a better way to handle events count. */
1531 	count = asus->event_count[event % 128]++;
1532 	acpi_bus_generate_netlink_event(asus->device->pnp.device_class,
1533 					dev_name(&asus->device->dev), event,
1534 					count);
1535 
1536 	if (event >= ATKD_BRNUP_MIN && event <= ATKD_BRNUP_MAX)
1537 		event = ATKD_BRNUP;
1538 	else if (event >= ATKD_BRNDOWN_MIN &&
1539 		 event <= ATKD_BRNDOWN_MAX)
1540 		event = ATKD_BRNDOWN;
1541 
1542 	/* Brightness events are special */
1543 	if (event == ATKD_BRNDOWN || event == ATKD_BRNUP) {
1544 		if (asus->backlight_device != NULL) {
1545 			/* Update the backlight device. */
1546 			asus_backlight_notify(asus);
1547 			return ;
1548 		}
1549 	}
1550 
1551 	/* Accelerometer "coarse orientation change" event */
1552 	if (asus->pega_accel_poll && event == 0xEA) {
1553 		kobject_uevent(&asus->pega_accel_poll->dev.kobj, KOBJ_CHANGE);
1554 		return ;
1555 	}
1556 
1557 	asus_input_notify(asus, event);
1558 }
1559 
1560 static struct attribute *asus_attributes[] = {
1561 	&dev_attr_infos.attr,
1562 	&dev_attr_wlan.attr,
1563 	&dev_attr_bluetooth.attr,
1564 	&dev_attr_wimax.attr,
1565 	&dev_attr_wwan.attr,
1566 	&dev_attr_display.attr,
1567 	&dev_attr_ledd.attr,
1568 	&dev_attr_ls_value.attr,
1569 	&dev_attr_ls_level.attr,
1570 	&dev_attr_ls_switch.attr,
1571 	&dev_attr_gps.attr,
1572 	NULL
1573 };
1574 
1575 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1576 				    struct attribute *attr,
1577 				    int idx)
1578 {
1579 	struct device *dev = container_of(kobj, struct device, kobj);
1580 	struct asus_laptop *asus = dev_get_drvdata(dev);
1581 	acpi_handle handle = asus->handle;
1582 	bool supported;
1583 
1584 	if (asus->is_pega_lucid) {
1585 		/* no ls_level interface on the Lucid */
1586 		if (attr == &dev_attr_ls_switch.attr)
1587 			supported = true;
1588 		else if (attr == &dev_attr_ls_level.attr)
1589 			supported = false;
1590 		else
1591 			goto normal;
1592 
1593 		return supported ? attr->mode : 0;
1594 	}
1595 
1596 normal:
1597 	if (attr == &dev_attr_wlan.attr) {
1598 		supported = !acpi_check_handle(handle, METHOD_WLAN, NULL);
1599 
1600 	} else if (attr == &dev_attr_bluetooth.attr) {
1601 		supported = !acpi_check_handle(handle, METHOD_BLUETOOTH, NULL);
1602 
1603 	} else if (attr == &dev_attr_display.attr) {
1604 		supported = !acpi_check_handle(handle, METHOD_SWITCH_DISPLAY, NULL);
1605 
1606 	} else if (attr == &dev_attr_wimax.attr) {
1607 		supported =
1608 			!acpi_check_handle(asus->handle, METHOD_WIMAX, NULL);
1609 
1610 	} else if (attr == &dev_attr_wwan.attr) {
1611 		supported = !acpi_check_handle(asus->handle, METHOD_WWAN, NULL);
1612 
1613 	} else if (attr == &dev_attr_ledd.attr) {
1614 		supported = !acpi_check_handle(handle, METHOD_LEDD, NULL);
1615 
1616 	} else if (attr == &dev_attr_ls_switch.attr ||
1617 		   attr == &dev_attr_ls_level.attr) {
1618 		supported = !acpi_check_handle(handle, METHOD_ALS_CONTROL, NULL) &&
1619 			!acpi_check_handle(handle, METHOD_ALS_LEVEL, NULL);
1620 	} else if (attr == &dev_attr_ls_value.attr) {
1621 		supported = asus->is_pega_lucid;
1622 	} else if (attr == &dev_attr_gps.attr) {
1623 		supported = !acpi_check_handle(handle, METHOD_GPS_ON, NULL) &&
1624 			    !acpi_check_handle(handle, METHOD_GPS_OFF, NULL) &&
1625 			    !acpi_check_handle(handle, METHOD_GPS_STATUS, NULL);
1626 	} else {
1627 		supported = true;
1628 	}
1629 
1630 	return supported ? attr->mode : 0;
1631 }
1632 
1633 
1634 static const struct attribute_group asus_attr_group = {
1635 	.is_visible	= asus_sysfs_is_visible,
1636 	.attrs		= asus_attributes,
1637 };
1638 
1639 static int asus_platform_init(struct asus_laptop *asus)
1640 {
1641 	int result;
1642 
1643 	asus->platform_device = platform_device_alloc(ASUS_LAPTOP_FILE, -1);
1644 	if (!asus->platform_device)
1645 		return -ENOMEM;
1646 	platform_set_drvdata(asus->platform_device, asus);
1647 
1648 	result = platform_device_add(asus->platform_device);
1649 	if (result)
1650 		goto fail_platform_device;
1651 
1652 	result = sysfs_create_group(&asus->platform_device->dev.kobj,
1653 				    &asus_attr_group);
1654 	if (result)
1655 		goto fail_sysfs;
1656 
1657 	return 0;
1658 
1659 fail_sysfs:
1660 	platform_device_del(asus->platform_device);
1661 fail_platform_device:
1662 	platform_device_put(asus->platform_device);
1663 	return result;
1664 }
1665 
1666 static void asus_platform_exit(struct asus_laptop *asus)
1667 {
1668 	sysfs_remove_group(&asus->platform_device->dev.kobj, &asus_attr_group);
1669 	platform_device_unregister(asus->platform_device);
1670 }
1671 
1672 static struct platform_driver platform_driver = {
1673 	.driver = {
1674 		.name = ASUS_LAPTOP_FILE,
1675 	},
1676 };
1677 
1678 /*
1679  * This function is used to initialize the context with right values. In this
1680  * method, we can make all the detection we want, and modify the asus_laptop
1681  * struct
1682  */
1683 static int asus_laptop_get_info(struct asus_laptop *asus)
1684 {
1685 	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
1686 	union acpi_object *model = NULL;
1687 	unsigned long long bsts_result;
1688 	char *string = NULL;
1689 	acpi_status status;
1690 
1691 	/*
1692 	 * Get DSDT headers early enough to allow for differentiating between
1693 	 * models, but late enough to allow acpi_bus_register_driver() to fail
1694 	 * before doing anything ACPI-specific. Should we encounter a machine,
1695 	 * which needs special handling (i.e. its hotkey device has a different
1696 	 * HID), this bit will be moved.
1697 	 */
1698 	status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus->dsdt_info);
1699 	if (ACPI_FAILURE(status))
1700 		pr_warn("Couldn't get the DSDT table header\n");
1701 
1702 	/* We have to write 0 on init this far for all ASUS models */
1703 	if (write_acpi_int_ret(asus->handle, "INIT", 0, &buffer)) {
1704 		pr_err("Hotkey initialization failed\n");
1705 		return -ENODEV;
1706 	}
1707 
1708 	/* This needs to be called for some laptops to init properly */
1709 	status =
1710 	    acpi_evaluate_integer(asus->handle, "BSTS", NULL, &bsts_result);
1711 	if (ACPI_FAILURE(status))
1712 		pr_warn("Error calling BSTS\n");
1713 	else if (bsts_result)
1714 		pr_notice("BSTS called, 0x%02x returned\n",
1715 		       (uint) bsts_result);
1716 
1717 	/* This too ... */
1718 	if (write_acpi_int(asus->handle, "CWAP", wapf))
1719 		pr_err("Error calling CWAP(%d)\n", wapf);
1720 	/*
1721 	 * Try to match the object returned by INIT to the specific model.
1722 	 * Handle every possible object (or the lack of thereof) the DSDT
1723 	 * writers might throw at us. When in trouble, we pass NULL to
1724 	 * asus_model_match() and try something completely different.
1725 	 */
1726 	if (buffer.pointer) {
1727 		model = buffer.pointer;
1728 		switch (model->type) {
1729 		case ACPI_TYPE_STRING:
1730 			string = model->string.pointer;
1731 			break;
1732 		case ACPI_TYPE_BUFFER:
1733 			string = model->buffer.pointer;
1734 			break;
1735 		default:
1736 			string = "";
1737 			break;
1738 		}
1739 	}
1740 	asus->name = kstrdup(string, GFP_KERNEL);
1741 	if (!asus->name) {
1742 		kfree(buffer.pointer);
1743 		return -ENOMEM;
1744 	}
1745 
1746 	if (string)
1747 		pr_notice("  %s model detected\n", string);
1748 
1749 	if (!acpi_check_handle(asus->handle, METHOD_WL_STATUS, NULL))
1750 		asus->have_rsts = true;
1751 
1752 	kfree(model);
1753 
1754 	return AE_OK;
1755 }
1756 
1757 static int asus_acpi_init(struct asus_laptop *asus)
1758 {
1759 	int result = 0;
1760 
1761 	result = acpi_bus_get_status(asus->device);
1762 	if (result)
1763 		return result;
1764 	if (!asus->device->status.present) {
1765 		pr_err("Hotkey device not present, aborting\n");
1766 		return -ENODEV;
1767 	}
1768 
1769 	result = asus_laptop_get_info(asus);
1770 	if (result)
1771 		return result;
1772 
1773 	if (!strcmp(bled_type, "led"))
1774 		asus->bled_type = TYPE_LED;
1775 	else if (!strcmp(bled_type, "rfkill"))
1776 		asus->bled_type = TYPE_RFKILL;
1777 
1778 	if (!strcmp(wled_type, "led"))
1779 		asus->wled_type = TYPE_LED;
1780 	else if (!strcmp(wled_type, "rfkill"))
1781 		asus->wled_type = TYPE_RFKILL;
1782 
1783 	if (bluetooth_status >= 0)
1784 		asus_bluetooth_set(asus, !!bluetooth_status);
1785 
1786 	if (wlan_status >= 0)
1787 		asus_wlan_set(asus, !!wlan_status);
1788 
1789 	if (wimax_status >= 0)
1790 		asus_wimax_set(asus, !!wimax_status);
1791 
1792 	if (wwan_status >= 0)
1793 		asus_wwan_set(asus, !!wwan_status);
1794 
1795 	/* Keyboard Backlight is on by default */
1796 	if (!acpi_check_handle(asus->handle, METHOD_KBD_LIGHT_SET, NULL))
1797 		asus_kled_set(asus, 1);
1798 
1799 	/* LED display is off by default */
1800 	asus->ledd_status = 0xFFF;
1801 
1802 	/* Set initial values of light sensor and level */
1803 	asus->light_switch = !!als_status;
1804 	asus->light_level = 5;	/* level 5 for sensor sensitivity */
1805 
1806 	if (asus->is_pega_lucid) {
1807 		asus_als_switch(asus, asus->light_switch);
1808 	} else if (!acpi_check_handle(asus->handle, METHOD_ALS_CONTROL, NULL) &&
1809 		   !acpi_check_handle(asus->handle, METHOD_ALS_LEVEL, NULL)) {
1810 		asus_als_switch(asus, asus->light_switch);
1811 		asus_als_level(asus, asus->light_level);
1812 	}
1813 
1814 	return result;
1815 }
1816 
1817 static void asus_dmi_check(void)
1818 {
1819 	const char *model;
1820 
1821 	model = dmi_get_system_info(DMI_PRODUCT_NAME);
1822 	if (!model)
1823 		return;
1824 
1825 	/* On L1400B WLED control the sound card, don't mess with it ... */
1826 	if (strncmp(model, "L1400B", 6) == 0) {
1827 		wlan_status = -1;
1828 	}
1829 }
1830 
1831 static bool asus_device_present;
1832 
1833 static int asus_acpi_add(struct acpi_device *device)
1834 {
1835 	struct asus_laptop *asus;
1836 	int result;
1837 
1838 	pr_notice("Asus Laptop Support version %s\n",
1839 		  ASUS_LAPTOP_VERSION);
1840 	asus = kzalloc(sizeof(struct asus_laptop), GFP_KERNEL);
1841 	if (!asus)
1842 		return -ENOMEM;
1843 	asus->handle = device->handle;
1844 	strcpy(acpi_device_name(device), ASUS_LAPTOP_DEVICE_NAME);
1845 	strcpy(acpi_device_class(device), ASUS_LAPTOP_CLASS);
1846 	device->driver_data = asus;
1847 	asus->device = device;
1848 
1849 	asus_dmi_check();
1850 
1851 	result = asus_acpi_init(asus);
1852 	if (result)
1853 		goto fail_platform;
1854 
1855 	/*
1856 	 * Need platform type detection first, then the platform
1857 	 * device.  It is used as a parent for the sub-devices below.
1858 	 */
1859 	asus->is_pega_lucid = asus_check_pega_lucid(asus);
1860 	result = asus_platform_init(asus);
1861 	if (result)
1862 		goto fail_platform;
1863 
1864 	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1865 		result = asus_backlight_init(asus);
1866 		if (result)
1867 			goto fail_backlight;
1868 	}
1869 
1870 	result = asus_input_init(asus);
1871 	if (result)
1872 		goto fail_input;
1873 
1874 	result = asus_led_init(asus);
1875 	if (result)
1876 		goto fail_led;
1877 
1878 	result = asus_rfkill_init(asus);
1879 	if (result && result != -ENODEV)
1880 		goto fail_rfkill;
1881 
1882 	result = pega_accel_init(asus);
1883 	if (result && result != -ENODEV)
1884 		goto fail_pega_accel;
1885 
1886 	result = pega_rfkill_init(asus);
1887 	if (result && result != -ENODEV)
1888 		goto fail_pega_rfkill;
1889 
1890 	asus_device_present = true;
1891 	return 0;
1892 
1893 fail_pega_rfkill:
1894 	pega_accel_exit(asus);
1895 fail_pega_accel:
1896 	asus_rfkill_exit(asus);
1897 fail_rfkill:
1898 	asus_led_exit(asus);
1899 fail_led:
1900 	asus_input_exit(asus);
1901 fail_input:
1902 	asus_backlight_exit(asus);
1903 fail_backlight:
1904 	asus_platform_exit(asus);
1905 fail_platform:
1906 	kfree(asus);
1907 
1908 	return result;
1909 }
1910 
1911 static int asus_acpi_remove(struct acpi_device *device)
1912 {
1913 	struct asus_laptop *asus = acpi_driver_data(device);
1914 
1915 	asus_backlight_exit(asus);
1916 	asus_rfkill_exit(asus);
1917 	asus_led_exit(asus);
1918 	asus_input_exit(asus);
1919 	pega_accel_exit(asus);
1920 	asus_platform_exit(asus);
1921 
1922 	kfree(asus->name);
1923 	kfree(asus);
1924 	return 0;
1925 }
1926 
1927 static const struct acpi_device_id asus_device_ids[] = {
1928 	{"ATK0100", 0},
1929 	{"ATK0101", 0},
1930 	{"", 0},
1931 };
1932 MODULE_DEVICE_TABLE(acpi, asus_device_ids);
1933 
1934 static struct acpi_driver asus_acpi_driver = {
1935 	.name = ASUS_LAPTOP_NAME,
1936 	.class = ASUS_LAPTOP_CLASS,
1937 	.owner = THIS_MODULE,
1938 	.ids = asus_device_ids,
1939 	.flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1940 	.ops = {
1941 		.add = asus_acpi_add,
1942 		.remove = asus_acpi_remove,
1943 		.notify = asus_acpi_notify,
1944 		},
1945 };
1946 
1947 static int __init asus_laptop_init(void)
1948 {
1949 	int result;
1950 
1951 	result = platform_driver_register(&platform_driver);
1952 	if (result < 0)
1953 		return result;
1954 
1955 	result = acpi_bus_register_driver(&asus_acpi_driver);
1956 	if (result < 0)
1957 		goto fail_acpi_driver;
1958 	if (!asus_device_present) {
1959 		result = -ENODEV;
1960 		goto fail_no_device;
1961 	}
1962 	return 0;
1963 
1964 fail_no_device:
1965 	acpi_bus_unregister_driver(&asus_acpi_driver);
1966 fail_acpi_driver:
1967 	platform_driver_unregister(&platform_driver);
1968 	return result;
1969 }
1970 
1971 static void __exit asus_laptop_exit(void)
1972 {
1973 	acpi_bus_unregister_driver(&asus_acpi_driver);
1974 	platform_driver_unregister(&platform_driver);
1975 }
1976 
1977 module_init(asus_laptop_init);
1978 module_exit(asus_laptop_exit);
1979