xref: /openbmc/linux/drivers/platform/x86/acer-wmi.c (revision 98ddec80)
1 /*
2  *  Acer WMI Laptop Extras
3  *
4  *  Copyright (C) 2007-2009	Carlos Corbacho <carlos@strangeworlds.co.uk>
5  *
6  *  Based on acer_acpi:
7  *    Copyright (C) 2005-2007	E.M. Smith
8  *    Copyright (C) 2007-2008	Carlos Corbacho <cathectic@gmail.com>
9  *
10  *  This program is free software; you can redistribute it and/or modify
11  *  it under the terms of the GNU General Public License as published by
12  *  the Free Software Foundation; either version 2 of the License, or
13  *  (at your option) any later version.
14  *
15  *  This program is distributed in the hope that it will be useful,
16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  *  GNU General Public License for more details.
19  *
20  *  You should have received a copy of the GNU General Public License
21  *  along with this program; if not, write to the Free Software
22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23  */
24 
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26 
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/types.h>
31 #include <linux/dmi.h>
32 #include <linux/fb.h>
33 #include <linux/backlight.h>
34 #include <linux/leds.h>
35 #include <linux/platform_device.h>
36 #include <linux/acpi.h>
37 #include <linux/i8042.h>
38 #include <linux/rfkill.h>
39 #include <linux/workqueue.h>
40 #include <linux/debugfs.h>
41 #include <linux/slab.h>
42 #include <linux/input.h>
43 #include <linux/input/sparse-keymap.h>
44 #include <acpi/video.h>
45 
46 MODULE_AUTHOR("Carlos Corbacho");
47 MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
48 MODULE_LICENSE("GPL");
49 
50 /*
51  * Magic Number
52  * Meaning is unknown - this number is required for writing to ACPI for AMW0
53  * (it's also used in acerhk when directly accessing the BIOS)
54  */
55 #define ACER_AMW0_WRITE	0x9610
56 
57 /*
58  * Bit masks for the AMW0 interface
59  */
60 #define ACER_AMW0_WIRELESS_MASK  0x35
61 #define ACER_AMW0_BLUETOOTH_MASK 0x34
62 #define ACER_AMW0_MAILLED_MASK   0x31
63 
64 /*
65  * Method IDs for WMID interface
66  */
67 #define ACER_WMID_GET_WIRELESS_METHODID		1
68 #define ACER_WMID_GET_BLUETOOTH_METHODID	2
69 #define ACER_WMID_GET_BRIGHTNESS_METHODID	3
70 #define ACER_WMID_SET_WIRELESS_METHODID		4
71 #define ACER_WMID_SET_BLUETOOTH_METHODID	5
72 #define ACER_WMID_SET_BRIGHTNESS_METHODID	6
73 #define ACER_WMID_GET_THREEG_METHODID		10
74 #define ACER_WMID_SET_THREEG_METHODID		11
75 
76 /*
77  * Acer ACPI method GUIDs
78  */
79 #define AMW0_GUID1		"67C3371D-95A3-4C37-BB61-DD47B491DAAB"
80 #define AMW0_GUID2		"431F16ED-0C2B-444C-B267-27DEB140CF9C"
81 #define WMID_GUID1		"6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3"
82 #define WMID_GUID2		"95764E09-FB56-4E83-B31A-37761F60994A"
83 #define WMID_GUID3		"61EF69EA-865C-4BC3-A502-A0DEBA0CB531"
84 
85 /*
86  * Acer ACPI event GUIDs
87  */
88 #define ACERWMID_EVENT_GUID "676AA15E-6A47-4D9F-A2CC-1E6D18D14026"
89 
90 MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
91 MODULE_ALIAS("wmi:6AF4F258-B401-42FD-BE91-3D4AC2D7C0D3");
92 MODULE_ALIAS("wmi:676AA15E-6A47-4D9F-A2CC-1E6D18D14026");
93 
94 enum acer_wmi_event_ids {
95 	WMID_HOTKEY_EVENT = 0x1,
96 	WMID_ACCEL_EVENT = 0x5,
97 };
98 
99 static const struct key_entry acer_wmi_keymap[] __initconst = {
100 	{KE_KEY, 0x01, {KEY_WLAN} },     /* WiFi */
101 	{KE_KEY, 0x03, {KEY_WLAN} },     /* WiFi */
102 	{KE_KEY, 0x04, {KEY_WLAN} },     /* WiFi */
103 	{KE_KEY, 0x12, {KEY_BLUETOOTH} },	/* BT */
104 	{KE_KEY, 0x21, {KEY_PROG1} },    /* Backup */
105 	{KE_KEY, 0x22, {KEY_PROG2} },    /* Arcade */
106 	{KE_KEY, 0x23, {KEY_PROG3} },    /* P_Key */
107 	{KE_KEY, 0x24, {KEY_PROG4} },    /* Social networking_Key */
108 	{KE_KEY, 0x29, {KEY_PROG3} },    /* P_Key for TM8372 */
109 	{KE_IGNORE, 0x41, {KEY_MUTE} },
110 	{KE_IGNORE, 0x42, {KEY_PREVIOUSSONG} },
111 	{KE_IGNORE, 0x4d, {KEY_PREVIOUSSONG} },
112 	{KE_IGNORE, 0x43, {KEY_NEXTSONG} },
113 	{KE_IGNORE, 0x4e, {KEY_NEXTSONG} },
114 	{KE_IGNORE, 0x44, {KEY_PLAYPAUSE} },
115 	{KE_IGNORE, 0x4f, {KEY_PLAYPAUSE} },
116 	{KE_IGNORE, 0x45, {KEY_STOP} },
117 	{KE_IGNORE, 0x50, {KEY_STOP} },
118 	{KE_IGNORE, 0x48, {KEY_VOLUMEUP} },
119 	{KE_IGNORE, 0x49, {KEY_VOLUMEDOWN} },
120 	{KE_IGNORE, 0x4a, {KEY_VOLUMEDOWN} },
121 	{KE_IGNORE, 0x61, {KEY_SWITCHVIDEOMODE} },
122 	{KE_IGNORE, 0x62, {KEY_BRIGHTNESSUP} },
123 	{KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
124 	{KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} },	/* Display Switch */
125 	{KE_IGNORE, 0x81, {KEY_SLEEP} },
126 	{KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} },	/* Touch Pad Toggle */
127 	{KE_KEY, KEY_TOUCHPAD_ON, {KEY_TOUCHPAD_ON} },
128 	{KE_KEY, KEY_TOUCHPAD_OFF, {KEY_TOUCHPAD_OFF} },
129 	{KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
130 	{KE_KEY, 0x85, {KEY_TOUCHPAD_TOGGLE} },
131 	{KE_KEY, 0x86, {KEY_WLAN} },
132 	{KE_KEY, 0x87, {KEY_POWER} },
133 	{KE_END, 0}
134 };
135 
136 static struct input_dev *acer_wmi_input_dev;
137 static struct input_dev *acer_wmi_accel_dev;
138 
139 struct event_return_value {
140 	u8 function;
141 	u8 key_num;
142 	u16 device_state;
143 	u32 reserved;
144 } __attribute__((packed));
145 
146 /*
147  * GUID3 Get Device Status device flags
148  */
149 #define ACER_WMID3_GDS_WIRELESS		(1<<0)	/* WiFi */
150 #define ACER_WMID3_GDS_THREEG		(1<<6)	/* 3G */
151 #define ACER_WMID3_GDS_WIMAX		(1<<7)	/* WiMAX */
152 #define ACER_WMID3_GDS_BLUETOOTH	(1<<11)	/* BT */
153 #define ACER_WMID3_GDS_RFBTN		(1<<14)	/* RF Button */
154 
155 #define ACER_WMID3_GDS_TOUCHPAD		(1<<1)	/* Touchpad */
156 
157 /* Hotkey Customized Setting and Acer Application Status.
158  * Set Device Default Value and Report Acer Application Status.
159  * When Acer Application starts, it will run this method to inform
160  * BIOS/EC that Acer Application is on.
161  * App Status
162  *	Bit[0]: Launch Manager Status
163  *	Bit[1]: ePM Status
164  *	Bit[2]: Device Control Status
165  *	Bit[3]: Acer Power Button Utility Status
166  *	Bit[4]: RF Button Status
167  *	Bit[5]: ODD PM Status
168  *	Bit[6]: Device Default Value Control
169  *	Bit[7]: Hall Sensor Application Status
170  */
171 struct func_input_params {
172 	u8 function_num;        /* Function Number */
173 	u16 commun_devices;     /* Communication type devices default status */
174 	u16 devices;            /* Other type devices default status */
175 	u8 app_status;          /* Acer Device Status. LM, ePM, RF Button... */
176 	u8 app_mask;		/* Bit mask to app_status */
177 	u8 reserved;
178 } __attribute__((packed));
179 
180 struct func_return_value {
181 	u8 error_code;          /* Error Code */
182 	u8 ec_return_value;     /* EC Return Value */
183 	u16 reserved;
184 } __attribute__((packed));
185 
186 struct wmid3_gds_set_input_param {     /* Set Device Status input parameter */
187 	u8 function_num;        /* Function Number */
188 	u8 hotkey_number;       /* Hotkey Number */
189 	u16 devices;            /* Set Device */
190 	u8 volume_value;        /* Volume Value */
191 } __attribute__((packed));
192 
193 struct wmid3_gds_get_input_param {     /* Get Device Status input parameter */
194 	u8 function_num;	/* Function Number */
195 	u8 hotkey_number;	/* Hotkey Number */
196 	u16 devices;		/* Get Device */
197 } __attribute__((packed));
198 
199 struct wmid3_gds_return_value {	/* Get Device Status return value*/
200 	u8 error_code;		/* Error Code */
201 	u8 ec_return_value;	/* EC Return Value */
202 	u16 devices;		/* Current Device Status */
203 	u32 reserved;
204 } __attribute__((packed));
205 
206 struct hotkey_function_type_aa {
207 	u8 type;
208 	u8 length;
209 	u16 handle;
210 	u16 commun_func_bitmap;
211 	u16 application_func_bitmap;
212 	u16 media_func_bitmap;
213 	u16 display_func_bitmap;
214 	u16 others_func_bitmap;
215 	u8 commun_fn_key_number;
216 } __attribute__((packed));
217 
218 /*
219  * Interface capability flags
220  */
221 #define ACER_CAP_MAILLED		(1<<0)
222 #define ACER_CAP_WIRELESS		(1<<1)
223 #define ACER_CAP_BLUETOOTH		(1<<2)
224 #define ACER_CAP_BRIGHTNESS		(1<<3)
225 #define ACER_CAP_THREEG			(1<<4)
226 #define ACER_CAP_ACCEL			(1<<5)
227 #define ACER_CAP_RFBTN			(1<<6)
228 #define ACER_CAP_ANY			(0xFFFFFFFF)
229 
230 /*
231  * Interface type flags
232  */
233 enum interface_flags {
234 	ACER_AMW0,
235 	ACER_AMW0_V2,
236 	ACER_WMID,
237 	ACER_WMID_v2,
238 };
239 
240 #define ACER_DEFAULT_WIRELESS  0
241 #define ACER_DEFAULT_BLUETOOTH 0
242 #define ACER_DEFAULT_MAILLED   0
243 #define ACER_DEFAULT_THREEG    0
244 
245 static int max_brightness = 0xF;
246 
247 static int mailled = -1;
248 static int brightness = -1;
249 static int threeg = -1;
250 static int force_series;
251 static bool ec_raw_mode;
252 static bool has_type_aa;
253 static u16 commun_func_bitmap;
254 static u8 commun_fn_key_number;
255 
256 module_param(mailled, int, 0444);
257 module_param(brightness, int, 0444);
258 module_param(threeg, int, 0444);
259 module_param(force_series, int, 0444);
260 module_param(ec_raw_mode, bool, 0444);
261 MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
262 MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
263 MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
264 MODULE_PARM_DESC(force_series, "Force a different laptop series");
265 MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
266 
267 struct acer_data {
268 	int mailled;
269 	int threeg;
270 	int brightness;
271 };
272 
273 struct acer_debug {
274 	struct dentry *root;
275 	struct dentry *devices;
276 	u32 wmid_devices;
277 };
278 
279 static struct rfkill *wireless_rfkill;
280 static struct rfkill *bluetooth_rfkill;
281 static struct rfkill *threeg_rfkill;
282 static bool rfkill_inited;
283 
284 /* Each low-level interface must define at least some of the following */
285 struct wmi_interface {
286 	/* The WMI device type */
287 	u32 type;
288 
289 	/* The capabilities this interface provides */
290 	u32 capability;
291 
292 	/* Private data for the current interface */
293 	struct acer_data data;
294 
295 	/* debugfs entries associated with this interface */
296 	struct acer_debug debug;
297 };
298 
299 /* The static interface pointer, points to the currently detected interface */
300 static struct wmi_interface *interface;
301 
302 /*
303  * Embedded Controller quirks
304  * Some laptops require us to directly access the EC to either enable or query
305  * features that are not available through WMI.
306  */
307 
308 struct quirk_entry {
309 	u8 wireless;
310 	u8 mailled;
311 	s8 brightness;
312 	u8 bluetooth;
313 };
314 
315 static struct quirk_entry *quirks;
316 
317 static void __init set_quirks(void)
318 {
319 	if (!interface)
320 		return;
321 
322 	if (quirks->mailled)
323 		interface->capability |= ACER_CAP_MAILLED;
324 
325 	if (quirks->brightness)
326 		interface->capability |= ACER_CAP_BRIGHTNESS;
327 }
328 
329 static int __init dmi_matched(const struct dmi_system_id *dmi)
330 {
331 	quirks = dmi->driver_data;
332 	return 1;
333 }
334 
335 static struct quirk_entry quirk_unknown = {
336 };
337 
338 static struct quirk_entry quirk_acer_aspire_1520 = {
339 	.brightness = -1,
340 };
341 
342 static struct quirk_entry quirk_acer_travelmate_2490 = {
343 	.mailled = 1,
344 };
345 
346 /* This AMW0 laptop has no bluetooth */
347 static struct quirk_entry quirk_medion_md_98300 = {
348 	.wireless = 1,
349 };
350 
351 static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
352 	.wireless = 2,
353 };
354 
355 static struct quirk_entry quirk_lenovo_ideapad_s205 = {
356 	.wireless = 3,
357 };
358 
359 /* The Aspire One has a dummy ACPI-WMI interface - disable it */
360 static const struct dmi_system_id acer_blacklist[] __initconst = {
361 	{
362 		.ident = "Acer Aspire One (SSD)",
363 		.matches = {
364 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
365 			DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
366 		},
367 	},
368 	{
369 		.ident = "Acer Aspire One (HDD)",
370 		.matches = {
371 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
372 			DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
373 		},
374 	},
375 	{}
376 };
377 
378 static const struct dmi_system_id amw0_whitelist[] __initconst = {
379 	{
380 		.ident = "Acer",
381 		.matches = {
382 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
383 		},
384 	},
385 	{
386 		.ident = "Gateway",
387 		.matches = {
388 			DMI_MATCH(DMI_SYS_VENDOR, "Gateway"),
389 		},
390 	},
391 	{
392 		.ident = "Packard Bell",
393 		.matches = {
394 			DMI_MATCH(DMI_SYS_VENDOR, "Packard Bell"),
395 		},
396 	},
397 	{}
398 };
399 
400 /*
401  * This quirk table is only for Acer/Gateway/Packard Bell family
402  * that those machines are supported by acer-wmi driver.
403  */
404 static const struct dmi_system_id acer_quirks[] __initconst = {
405 	{
406 		.callback = dmi_matched,
407 		.ident = "Acer Aspire 1360",
408 		.matches = {
409 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
410 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
411 		},
412 		.driver_data = &quirk_acer_aspire_1520,
413 	},
414 	{
415 		.callback = dmi_matched,
416 		.ident = "Acer Aspire 1520",
417 		.matches = {
418 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
419 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
420 		},
421 		.driver_data = &quirk_acer_aspire_1520,
422 	},
423 	{
424 		.callback = dmi_matched,
425 		.ident = "Acer Aspire 3100",
426 		.matches = {
427 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
428 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
429 		},
430 		.driver_data = &quirk_acer_travelmate_2490,
431 	},
432 	{
433 		.callback = dmi_matched,
434 		.ident = "Acer Aspire 3610",
435 		.matches = {
436 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
437 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
438 		},
439 		.driver_data = &quirk_acer_travelmate_2490,
440 	},
441 	{
442 		.callback = dmi_matched,
443 		.ident = "Acer Aspire 5100",
444 		.matches = {
445 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
446 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
447 		},
448 		.driver_data = &quirk_acer_travelmate_2490,
449 	},
450 	{
451 		.callback = dmi_matched,
452 		.ident = "Acer Aspire 5610",
453 		.matches = {
454 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
455 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
456 		},
457 		.driver_data = &quirk_acer_travelmate_2490,
458 	},
459 	{
460 		.callback = dmi_matched,
461 		.ident = "Acer Aspire 5630",
462 		.matches = {
463 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
464 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
465 		},
466 		.driver_data = &quirk_acer_travelmate_2490,
467 	},
468 	{
469 		.callback = dmi_matched,
470 		.ident = "Acer Aspire 5650",
471 		.matches = {
472 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
473 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
474 		},
475 		.driver_data = &quirk_acer_travelmate_2490,
476 	},
477 	{
478 		.callback = dmi_matched,
479 		.ident = "Acer Aspire 5680",
480 		.matches = {
481 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
482 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
483 		},
484 		.driver_data = &quirk_acer_travelmate_2490,
485 	},
486 	{
487 		.callback = dmi_matched,
488 		.ident = "Acer Aspire 9110",
489 		.matches = {
490 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
491 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
492 		},
493 		.driver_data = &quirk_acer_travelmate_2490,
494 	},
495 	{
496 		.callback = dmi_matched,
497 		.ident = "Acer TravelMate 2490",
498 		.matches = {
499 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
500 			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
501 		},
502 		.driver_data = &quirk_acer_travelmate_2490,
503 	},
504 	{
505 		.callback = dmi_matched,
506 		.ident = "Acer TravelMate 4200",
507 		.matches = {
508 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
509 			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
510 		},
511 		.driver_data = &quirk_acer_travelmate_2490,
512 	},
513 	{}
514 };
515 
516 /*
517  * This quirk list is for those non-acer machines that have AMW0_GUID1
518  * but supported by acer-wmi in past days. Keeping this quirk list here
519  * is only for backward compatible. Please do not add new machine to
520  * here anymore. Those non-acer machines should be supported by
521  * appropriate wmi drivers.
522  */
523 static const struct dmi_system_id non_acer_quirks[] __initconst = {
524 	{
525 		.callback = dmi_matched,
526 		.ident = "Fujitsu Siemens Amilo Li 1718",
527 		.matches = {
528 			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
529 			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
530 		},
531 		.driver_data = &quirk_fujitsu_amilo_li_1718,
532 	},
533 	{
534 		.callback = dmi_matched,
535 		.ident = "Medion MD 98300",
536 		.matches = {
537 			DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
538 			DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
539 		},
540 		.driver_data = &quirk_medion_md_98300,
541 	},
542 	{
543 		.callback = dmi_matched,
544 		.ident = "Lenovo Ideapad S205",
545 		.matches = {
546 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
547 			DMI_MATCH(DMI_PRODUCT_NAME, "10382LG"),
548 		},
549 		.driver_data = &quirk_lenovo_ideapad_s205,
550 	},
551 	{
552 		.callback = dmi_matched,
553 		.ident = "Lenovo Ideapad S205 (Brazos)",
554 		.matches = {
555 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
556 			DMI_MATCH(DMI_PRODUCT_NAME, "Brazos"),
557 		},
558 		.driver_data = &quirk_lenovo_ideapad_s205,
559 	},
560 	{
561 		.callback = dmi_matched,
562 		.ident = "Lenovo 3000 N200",
563 		.matches = {
564 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
565 			DMI_MATCH(DMI_PRODUCT_NAME, "0687A31"),
566 		},
567 		.driver_data = &quirk_fujitsu_amilo_li_1718,
568 	},
569 	{
570 		.callback = dmi_matched,
571 		.ident = "Lenovo Ideapad S205-10382JG",
572 		.matches = {
573 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
574 			DMI_MATCH(DMI_PRODUCT_NAME, "10382JG"),
575 		},
576 		.driver_data = &quirk_lenovo_ideapad_s205,
577 	},
578 	{
579 		.callback = dmi_matched,
580 		.ident = "Lenovo Ideapad S205-1038DPG",
581 		.matches = {
582 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
583 			DMI_MATCH(DMI_PRODUCT_NAME, "1038DPG"),
584 		},
585 		.driver_data = &quirk_lenovo_ideapad_s205,
586 	},
587 	{}
588 };
589 
590 static int __init
591 video_set_backlight_video_vendor(const struct dmi_system_id *d)
592 {
593 	interface->capability &= ~ACER_CAP_BRIGHTNESS;
594 	pr_info("Brightness must be controlled by generic video driver\n");
595 	return 0;
596 }
597 
598 static const struct dmi_system_id video_vendor_dmi_table[] __initconst = {
599 	{
600 		.callback = video_set_backlight_video_vendor,
601 		.ident = "Acer TravelMate 4750",
602 		.matches = {
603 			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
604 			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
605 		},
606 	},
607 	{
608 		.callback = video_set_backlight_video_vendor,
609 		.ident = "Acer Extensa 5235",
610 		.matches = {
611 			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
612 			DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
613 		},
614 	},
615 	{
616 		.callback = video_set_backlight_video_vendor,
617 		.ident = "Acer TravelMate 5760",
618 		.matches = {
619 			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
620 			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
621 		},
622 	},
623 	{
624 		.callback = video_set_backlight_video_vendor,
625 		.ident = "Acer Aspire 5750",
626 		.matches = {
627 			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
628 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
629 		},
630 	},
631 	{
632 		.callback = video_set_backlight_video_vendor,
633 		.ident = "Acer Aspire 5741",
634 		.matches = {
635 			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
636 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5741"),
637 		},
638 	},
639 	{
640 		/*
641 		 * Note no video_set_backlight_video_vendor, we must use the
642 		 * acer interface, as there is no native backlight interface.
643 		 */
644 		.ident = "Acer KAV80",
645 		.matches = {
646 			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
647 			DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"),
648 		},
649 	},
650 	{}
651 };
652 
653 /* Find which quirks are needed for a particular vendor/ model pair */
654 static void __init find_quirks(void)
655 {
656 	if (!force_series) {
657 		dmi_check_system(acer_quirks);
658 		dmi_check_system(non_acer_quirks);
659 	} else if (force_series == 2490) {
660 		quirks = &quirk_acer_travelmate_2490;
661 	}
662 
663 	if (quirks == NULL)
664 		quirks = &quirk_unknown;
665 
666 	set_quirks();
667 }
668 
669 /*
670  * General interface convenience methods
671  */
672 
673 static bool has_cap(u32 cap)
674 {
675 	if ((interface->capability & cap) != 0)
676 		return 1;
677 
678 	return 0;
679 }
680 
681 /*
682  * AMW0 (V1) interface
683  */
684 struct wmab_args {
685 	u32 eax;
686 	u32 ebx;
687 	u32 ecx;
688 	u32 edx;
689 };
690 
691 struct wmab_ret {
692 	u32 eax;
693 	u32 ebx;
694 	u32 ecx;
695 	u32 edx;
696 	u32 eex;
697 };
698 
699 static acpi_status wmab_execute(struct wmab_args *regbuf,
700 struct acpi_buffer *result)
701 {
702 	struct acpi_buffer input;
703 	acpi_status status;
704 	input.length = sizeof(struct wmab_args);
705 	input.pointer = (u8 *)regbuf;
706 
707 	status = wmi_evaluate_method(AMW0_GUID1, 0, 1, &input, result);
708 
709 	return status;
710 }
711 
712 static acpi_status AMW0_get_u32(u32 *value, u32 cap)
713 {
714 	int err;
715 	u8 result;
716 
717 	switch (cap) {
718 	case ACER_CAP_MAILLED:
719 		switch (quirks->mailled) {
720 		default:
721 			err = ec_read(0xA, &result);
722 			if (err)
723 				return AE_ERROR;
724 			*value = (result >> 7) & 0x1;
725 			return AE_OK;
726 		}
727 		break;
728 	case ACER_CAP_WIRELESS:
729 		switch (quirks->wireless) {
730 		case 1:
731 			err = ec_read(0x7B, &result);
732 			if (err)
733 				return AE_ERROR;
734 			*value = result & 0x1;
735 			return AE_OK;
736 		case 2:
737 			err = ec_read(0x71, &result);
738 			if (err)
739 				return AE_ERROR;
740 			*value = result & 0x1;
741 			return AE_OK;
742 		case 3:
743 			err = ec_read(0x78, &result);
744 			if (err)
745 				return AE_ERROR;
746 			*value = result & 0x1;
747 			return AE_OK;
748 		default:
749 			err = ec_read(0xA, &result);
750 			if (err)
751 				return AE_ERROR;
752 			*value = (result >> 2) & 0x1;
753 			return AE_OK;
754 		}
755 		break;
756 	case ACER_CAP_BLUETOOTH:
757 		switch (quirks->bluetooth) {
758 		default:
759 			err = ec_read(0xA, &result);
760 			if (err)
761 				return AE_ERROR;
762 			*value = (result >> 4) & 0x1;
763 			return AE_OK;
764 		}
765 		break;
766 	case ACER_CAP_BRIGHTNESS:
767 		switch (quirks->brightness) {
768 		default:
769 			err = ec_read(0x83, &result);
770 			if (err)
771 				return AE_ERROR;
772 			*value = result;
773 			return AE_OK;
774 		}
775 		break;
776 	default:
777 		return AE_ERROR;
778 	}
779 	return AE_OK;
780 }
781 
782 static acpi_status AMW0_set_u32(u32 value, u32 cap)
783 {
784 	struct wmab_args args;
785 
786 	args.eax = ACER_AMW0_WRITE;
787 	args.ebx = value ? (1<<8) : 0;
788 	args.ecx = args.edx = 0;
789 
790 	switch (cap) {
791 	case ACER_CAP_MAILLED:
792 		if (value > 1)
793 			return AE_BAD_PARAMETER;
794 		args.ebx |= ACER_AMW0_MAILLED_MASK;
795 		break;
796 	case ACER_CAP_WIRELESS:
797 		if (value > 1)
798 			return AE_BAD_PARAMETER;
799 		args.ebx |= ACER_AMW0_WIRELESS_MASK;
800 		break;
801 	case ACER_CAP_BLUETOOTH:
802 		if (value > 1)
803 			return AE_BAD_PARAMETER;
804 		args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
805 		break;
806 	case ACER_CAP_BRIGHTNESS:
807 		if (value > max_brightness)
808 			return AE_BAD_PARAMETER;
809 		switch (quirks->brightness) {
810 		default:
811 			return ec_write(0x83, value);
812 			break;
813 		}
814 	default:
815 		return AE_ERROR;
816 	}
817 
818 	/* Actually do the set */
819 	return wmab_execute(&args, NULL);
820 }
821 
822 static acpi_status __init AMW0_find_mailled(void)
823 {
824 	struct wmab_args args;
825 	struct wmab_ret ret;
826 	acpi_status status = AE_OK;
827 	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
828 	union acpi_object *obj;
829 
830 	args.eax = 0x86;
831 	args.ebx = args.ecx = args.edx = 0;
832 
833 	status = wmab_execute(&args, &out);
834 	if (ACPI_FAILURE(status))
835 		return status;
836 
837 	obj = (union acpi_object *) out.pointer;
838 	if (obj && obj->type == ACPI_TYPE_BUFFER &&
839 	obj->buffer.length == sizeof(struct wmab_ret)) {
840 		ret = *((struct wmab_ret *) obj->buffer.pointer);
841 	} else {
842 		kfree(out.pointer);
843 		return AE_ERROR;
844 	}
845 
846 	if (ret.eex & 0x1)
847 		interface->capability |= ACER_CAP_MAILLED;
848 
849 	kfree(out.pointer);
850 
851 	return AE_OK;
852 }
853 
854 static const struct acpi_device_id norfkill_ids[] __initconst = {
855 	{ "VPC2004", 0},
856 	{ "IBM0068", 0},
857 	{ "LEN0068", 0},
858 	{ "SNY5001", 0},	/* sony-laptop in charge */
859 	{ "HPQ6601", 0},
860 	{ "", 0},
861 };
862 
863 static int __init AMW0_set_cap_acpi_check_device(void)
864 {
865 	const struct acpi_device_id *id;
866 
867 	for (id = norfkill_ids; id->id[0]; id++)
868 		if (acpi_dev_found(id->id))
869 			return true;
870 
871 	return false;
872 }
873 
874 static acpi_status __init AMW0_set_capabilities(void)
875 {
876 	struct wmab_args args;
877 	struct wmab_ret ret;
878 	acpi_status status;
879 	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
880 	union acpi_object *obj;
881 
882 	/*
883 	 * On laptops with this strange GUID (non Acer), normal probing doesn't
884 	 * work.
885 	 */
886 	if (wmi_has_guid(AMW0_GUID2)) {
887 		if ((quirks != &quirk_unknown) ||
888 		    !AMW0_set_cap_acpi_check_device())
889 			interface->capability |= ACER_CAP_WIRELESS;
890 		return AE_OK;
891 	}
892 
893 	args.eax = ACER_AMW0_WRITE;
894 	args.ecx = args.edx = 0;
895 
896 	args.ebx = 0xa2 << 8;
897 	args.ebx |= ACER_AMW0_WIRELESS_MASK;
898 
899 	status = wmab_execute(&args, &out);
900 	if (ACPI_FAILURE(status))
901 		return status;
902 
903 	obj = out.pointer;
904 	if (obj && obj->type == ACPI_TYPE_BUFFER &&
905 	obj->buffer.length == sizeof(struct wmab_ret)) {
906 		ret = *((struct wmab_ret *) obj->buffer.pointer);
907 	} else {
908 		status = AE_ERROR;
909 		goto out;
910 	}
911 
912 	if (ret.eax & 0x1)
913 		interface->capability |= ACER_CAP_WIRELESS;
914 
915 	args.ebx = 2 << 8;
916 	args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
917 
918 	/*
919 	 * It's ok to use existing buffer for next wmab_execute call.
920 	 * But we need to kfree(out.pointer) if next wmab_execute fail.
921 	 */
922 	status = wmab_execute(&args, &out);
923 	if (ACPI_FAILURE(status))
924 		goto out;
925 
926 	obj = (union acpi_object *) out.pointer;
927 	if (obj && obj->type == ACPI_TYPE_BUFFER
928 	&& obj->buffer.length == sizeof(struct wmab_ret)) {
929 		ret = *((struct wmab_ret *) obj->buffer.pointer);
930 	} else {
931 		status = AE_ERROR;
932 		goto out;
933 	}
934 
935 	if (ret.eax & 0x1)
936 		interface->capability |= ACER_CAP_BLUETOOTH;
937 
938 	/*
939 	 * This appears to be safe to enable, since all Wistron based laptops
940 	 * appear to use the same EC register for brightness, even if they
941 	 * differ for wireless, etc
942 	 */
943 	if (quirks->brightness >= 0)
944 		interface->capability |= ACER_CAP_BRIGHTNESS;
945 
946 	status = AE_OK;
947 out:
948 	kfree(out.pointer);
949 	return status;
950 }
951 
952 static struct wmi_interface AMW0_interface = {
953 	.type = ACER_AMW0,
954 };
955 
956 static struct wmi_interface AMW0_V2_interface = {
957 	.type = ACER_AMW0_V2,
958 };
959 
960 /*
961  * New interface (The WMID interface)
962  */
963 static acpi_status
964 WMI_execute_u32(u32 method_id, u32 in, u32 *out)
965 {
966 	struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
967 	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
968 	union acpi_object *obj;
969 	u32 tmp = 0;
970 	acpi_status status;
971 
972 	status = wmi_evaluate_method(WMID_GUID1, 0, method_id, &input, &result);
973 
974 	if (ACPI_FAILURE(status))
975 		return status;
976 
977 	obj = (union acpi_object *) result.pointer;
978 	if (obj) {
979 		if (obj->type == ACPI_TYPE_BUFFER &&
980 			(obj->buffer.length == sizeof(u32) ||
981 			obj->buffer.length == sizeof(u64))) {
982 			tmp = *((u32 *) obj->buffer.pointer);
983 		} else if (obj->type == ACPI_TYPE_INTEGER) {
984 			tmp = (u32) obj->integer.value;
985 		}
986 	}
987 
988 	if (out)
989 		*out = tmp;
990 
991 	kfree(result.pointer);
992 
993 	return status;
994 }
995 
996 static acpi_status WMID_get_u32(u32 *value, u32 cap)
997 {
998 	acpi_status status;
999 	u8 tmp;
1000 	u32 result, method_id = 0;
1001 
1002 	switch (cap) {
1003 	case ACER_CAP_WIRELESS:
1004 		method_id = ACER_WMID_GET_WIRELESS_METHODID;
1005 		break;
1006 	case ACER_CAP_BLUETOOTH:
1007 		method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
1008 		break;
1009 	case ACER_CAP_BRIGHTNESS:
1010 		method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
1011 		break;
1012 	case ACER_CAP_THREEG:
1013 		method_id = ACER_WMID_GET_THREEG_METHODID;
1014 		break;
1015 	case ACER_CAP_MAILLED:
1016 		if (quirks->mailled == 1) {
1017 			ec_read(0x9f, &tmp);
1018 			*value = tmp & 0x1;
1019 			return 0;
1020 		}
1021 	default:
1022 		return AE_ERROR;
1023 	}
1024 	status = WMI_execute_u32(method_id, 0, &result);
1025 
1026 	if (ACPI_SUCCESS(status))
1027 		*value = (u8)result;
1028 
1029 	return status;
1030 }
1031 
1032 static acpi_status WMID_set_u32(u32 value, u32 cap)
1033 {
1034 	u32 method_id = 0;
1035 	char param;
1036 
1037 	switch (cap) {
1038 	case ACER_CAP_BRIGHTNESS:
1039 		if (value > max_brightness)
1040 			return AE_BAD_PARAMETER;
1041 		method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
1042 		break;
1043 	case ACER_CAP_WIRELESS:
1044 		if (value > 1)
1045 			return AE_BAD_PARAMETER;
1046 		method_id = ACER_WMID_SET_WIRELESS_METHODID;
1047 		break;
1048 	case ACER_CAP_BLUETOOTH:
1049 		if (value > 1)
1050 			return AE_BAD_PARAMETER;
1051 		method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
1052 		break;
1053 	case ACER_CAP_THREEG:
1054 		if (value > 1)
1055 			return AE_BAD_PARAMETER;
1056 		method_id = ACER_WMID_SET_THREEG_METHODID;
1057 		break;
1058 	case ACER_CAP_MAILLED:
1059 		if (value > 1)
1060 			return AE_BAD_PARAMETER;
1061 		if (quirks->mailled == 1) {
1062 			param = value ? 0x92 : 0x93;
1063 			i8042_lock_chip();
1064 			i8042_command(&param, 0x1059);
1065 			i8042_unlock_chip();
1066 			return 0;
1067 		}
1068 		break;
1069 	default:
1070 		return AE_ERROR;
1071 	}
1072 	return WMI_execute_u32(method_id, (u32)value, NULL);
1073 }
1074 
1075 static acpi_status wmid3_get_device_status(u32 *value, u16 device)
1076 {
1077 	struct wmid3_gds_return_value return_value;
1078 	acpi_status status;
1079 	union acpi_object *obj;
1080 	struct wmid3_gds_get_input_param params = {
1081 		.function_num = 0x1,
1082 		.hotkey_number = commun_fn_key_number,
1083 		.devices = device,
1084 	};
1085 	struct acpi_buffer input = {
1086 		sizeof(struct wmid3_gds_get_input_param),
1087 		&params
1088 	};
1089 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1090 
1091 	status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &input, &output);
1092 	if (ACPI_FAILURE(status))
1093 		return status;
1094 
1095 	obj = output.pointer;
1096 
1097 	if (!obj)
1098 		return AE_ERROR;
1099 	else if (obj->type != ACPI_TYPE_BUFFER) {
1100 		kfree(obj);
1101 		return AE_ERROR;
1102 	}
1103 	if (obj->buffer.length != 8) {
1104 		pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1105 		kfree(obj);
1106 		return AE_ERROR;
1107 	}
1108 
1109 	return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1110 	kfree(obj);
1111 
1112 	if (return_value.error_code || return_value.ec_return_value)
1113 		pr_warn("Get 0x%x Device Status failed: 0x%x - 0x%x\n",
1114 			device,
1115 			return_value.error_code,
1116 			return_value.ec_return_value);
1117 	else
1118 		*value = !!(return_value.devices & device);
1119 
1120 	return status;
1121 }
1122 
1123 static acpi_status wmid_v2_get_u32(u32 *value, u32 cap)
1124 {
1125 	u16 device;
1126 
1127 	switch (cap) {
1128 	case ACER_CAP_WIRELESS:
1129 		device = ACER_WMID3_GDS_WIRELESS;
1130 		break;
1131 	case ACER_CAP_BLUETOOTH:
1132 		device = ACER_WMID3_GDS_BLUETOOTH;
1133 		break;
1134 	case ACER_CAP_THREEG:
1135 		device = ACER_WMID3_GDS_THREEG;
1136 		break;
1137 	default:
1138 		return AE_ERROR;
1139 	}
1140 	return wmid3_get_device_status(value, device);
1141 }
1142 
1143 static acpi_status wmid3_set_device_status(u32 value, u16 device)
1144 {
1145 	struct wmid3_gds_return_value return_value;
1146 	acpi_status status;
1147 	union acpi_object *obj;
1148 	u16 devices;
1149 	struct wmid3_gds_get_input_param get_params = {
1150 		.function_num = 0x1,
1151 		.hotkey_number = commun_fn_key_number,
1152 		.devices = commun_func_bitmap,
1153 	};
1154 	struct acpi_buffer get_input = {
1155 		sizeof(struct wmid3_gds_get_input_param),
1156 		&get_params
1157 	};
1158 	struct wmid3_gds_set_input_param set_params = {
1159 		.function_num = 0x2,
1160 		.hotkey_number = commun_fn_key_number,
1161 		.devices = commun_func_bitmap,
1162 	};
1163 	struct acpi_buffer set_input = {
1164 		sizeof(struct wmid3_gds_set_input_param),
1165 		&set_params
1166 	};
1167 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1168 	struct acpi_buffer output2 = { ACPI_ALLOCATE_BUFFER, NULL };
1169 
1170 	status = wmi_evaluate_method(WMID_GUID3, 0, 0x2, &get_input, &output);
1171 	if (ACPI_FAILURE(status))
1172 		return status;
1173 
1174 	obj = output.pointer;
1175 
1176 	if (!obj)
1177 		return AE_ERROR;
1178 	else if (obj->type != ACPI_TYPE_BUFFER) {
1179 		kfree(obj);
1180 		return AE_ERROR;
1181 	}
1182 	if (obj->buffer.length != 8) {
1183 		pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1184 		kfree(obj);
1185 		return AE_ERROR;
1186 	}
1187 
1188 	return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1189 	kfree(obj);
1190 
1191 	if (return_value.error_code || return_value.ec_return_value) {
1192 		pr_warn("Get Current Device Status failed: 0x%x - 0x%x\n",
1193 			return_value.error_code,
1194 			return_value.ec_return_value);
1195 		return status;
1196 	}
1197 
1198 	devices = return_value.devices;
1199 	set_params.devices = (value) ? (devices | device) : (devices & ~device);
1200 
1201 	status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &set_input, &output2);
1202 	if (ACPI_FAILURE(status))
1203 		return status;
1204 
1205 	obj = output2.pointer;
1206 
1207 	if (!obj)
1208 		return AE_ERROR;
1209 	else if (obj->type != ACPI_TYPE_BUFFER) {
1210 		kfree(obj);
1211 		return AE_ERROR;
1212 	}
1213 	if (obj->buffer.length != 4) {
1214 		pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1215 		kfree(obj);
1216 		return AE_ERROR;
1217 	}
1218 
1219 	return_value = *((struct wmid3_gds_return_value *)obj->buffer.pointer);
1220 	kfree(obj);
1221 
1222 	if (return_value.error_code || return_value.ec_return_value)
1223 		pr_warn("Set Device Status failed: 0x%x - 0x%x\n",
1224 			return_value.error_code,
1225 			return_value.ec_return_value);
1226 
1227 	return status;
1228 }
1229 
1230 static acpi_status wmid_v2_set_u32(u32 value, u32 cap)
1231 {
1232 	u16 device;
1233 
1234 	switch (cap) {
1235 	case ACER_CAP_WIRELESS:
1236 		device = ACER_WMID3_GDS_WIRELESS;
1237 		break;
1238 	case ACER_CAP_BLUETOOTH:
1239 		device = ACER_WMID3_GDS_BLUETOOTH;
1240 		break;
1241 	case ACER_CAP_THREEG:
1242 		device = ACER_WMID3_GDS_THREEG;
1243 		break;
1244 	default:
1245 		return AE_ERROR;
1246 	}
1247 	return wmid3_set_device_status(value, device);
1248 }
1249 
1250 static void __init type_aa_dmi_decode(const struct dmi_header *header, void *d)
1251 {
1252 	struct hotkey_function_type_aa *type_aa;
1253 
1254 	/* We are looking for OEM-specific Type AAh */
1255 	if (header->type != 0xAA)
1256 		return;
1257 
1258 	has_type_aa = true;
1259 	type_aa = (struct hotkey_function_type_aa *) header;
1260 
1261 	pr_info("Function bitmap for Communication Button: 0x%x\n",
1262 		type_aa->commun_func_bitmap);
1263 	commun_func_bitmap = type_aa->commun_func_bitmap;
1264 
1265 	if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_WIRELESS)
1266 		interface->capability |= ACER_CAP_WIRELESS;
1267 	if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_THREEG)
1268 		interface->capability |= ACER_CAP_THREEG;
1269 	if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_BLUETOOTH)
1270 		interface->capability |= ACER_CAP_BLUETOOTH;
1271 	if (type_aa->commun_func_bitmap & ACER_WMID3_GDS_RFBTN) {
1272 		interface->capability |= ACER_CAP_RFBTN;
1273 		commun_func_bitmap &= ~ACER_WMID3_GDS_RFBTN;
1274 	}
1275 
1276 	commun_fn_key_number = type_aa->commun_fn_key_number;
1277 }
1278 
1279 static acpi_status __init WMID_set_capabilities(void)
1280 {
1281 	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1282 	union acpi_object *obj;
1283 	acpi_status status;
1284 	u32 devices;
1285 
1286 	status = wmi_query_block(WMID_GUID2, 0, &out);
1287 	if (ACPI_FAILURE(status))
1288 		return status;
1289 
1290 	obj = (union acpi_object *) out.pointer;
1291 	if (obj) {
1292 		if (obj->type == ACPI_TYPE_BUFFER &&
1293 			(obj->buffer.length == sizeof(u32) ||
1294 			obj->buffer.length == sizeof(u64))) {
1295 			devices = *((u32 *) obj->buffer.pointer);
1296 		} else if (obj->type == ACPI_TYPE_INTEGER) {
1297 			devices = (u32) obj->integer.value;
1298 		} else {
1299 			kfree(out.pointer);
1300 			return AE_ERROR;
1301 		}
1302 	} else {
1303 		kfree(out.pointer);
1304 		return AE_ERROR;
1305 	}
1306 
1307 	pr_info("Function bitmap for Communication Device: 0x%x\n", devices);
1308 	if (devices & 0x07)
1309 		interface->capability |= ACER_CAP_WIRELESS;
1310 	if (devices & 0x40)
1311 		interface->capability |= ACER_CAP_THREEG;
1312 	if (devices & 0x10)
1313 		interface->capability |= ACER_CAP_BLUETOOTH;
1314 
1315 	if (!(devices & 0x20))
1316 		max_brightness = 0x9;
1317 
1318 	kfree(out.pointer);
1319 	return status;
1320 }
1321 
1322 static struct wmi_interface wmid_interface = {
1323 	.type = ACER_WMID,
1324 };
1325 
1326 static struct wmi_interface wmid_v2_interface = {
1327 	.type = ACER_WMID_v2,
1328 };
1329 
1330 /*
1331  * Generic Device (interface-independent)
1332  */
1333 
1334 static acpi_status get_u32(u32 *value, u32 cap)
1335 {
1336 	acpi_status status = AE_ERROR;
1337 
1338 	switch (interface->type) {
1339 	case ACER_AMW0:
1340 		status = AMW0_get_u32(value, cap);
1341 		break;
1342 	case ACER_AMW0_V2:
1343 		if (cap == ACER_CAP_MAILLED) {
1344 			status = AMW0_get_u32(value, cap);
1345 			break;
1346 		}
1347 	case ACER_WMID:
1348 		status = WMID_get_u32(value, cap);
1349 		break;
1350 	case ACER_WMID_v2:
1351 		if (cap & (ACER_CAP_WIRELESS |
1352 			   ACER_CAP_BLUETOOTH |
1353 			   ACER_CAP_THREEG))
1354 			status = wmid_v2_get_u32(value, cap);
1355 		else if (wmi_has_guid(WMID_GUID2))
1356 			status = WMID_get_u32(value, cap);
1357 		break;
1358 	}
1359 
1360 	return status;
1361 }
1362 
1363 static acpi_status set_u32(u32 value, u32 cap)
1364 {
1365 	acpi_status status;
1366 
1367 	if (interface->capability & cap) {
1368 		switch (interface->type) {
1369 		case ACER_AMW0:
1370 			return AMW0_set_u32(value, cap);
1371 		case ACER_AMW0_V2:
1372 			if (cap == ACER_CAP_MAILLED)
1373 				return AMW0_set_u32(value, cap);
1374 
1375 			/*
1376 			 * On some models, some WMID methods don't toggle
1377 			 * properly. For those cases, we want to run the AMW0
1378 			 * method afterwards to be certain we've really toggled
1379 			 * the device state.
1380 			 */
1381 			if (cap == ACER_CAP_WIRELESS ||
1382 				cap == ACER_CAP_BLUETOOTH) {
1383 				status = WMID_set_u32(value, cap);
1384 				if (ACPI_FAILURE(status))
1385 					return status;
1386 
1387 				return AMW0_set_u32(value, cap);
1388 			}
1389 		case ACER_WMID:
1390 			return WMID_set_u32(value, cap);
1391 		case ACER_WMID_v2:
1392 			if (cap & (ACER_CAP_WIRELESS |
1393 				   ACER_CAP_BLUETOOTH |
1394 				   ACER_CAP_THREEG))
1395 				return wmid_v2_set_u32(value, cap);
1396 			else if (wmi_has_guid(WMID_GUID2))
1397 				return WMID_set_u32(value, cap);
1398 		default:
1399 			return AE_BAD_PARAMETER;
1400 		}
1401 	}
1402 	return AE_BAD_PARAMETER;
1403 }
1404 
1405 static void __init acer_commandline_init(void)
1406 {
1407 	/*
1408 	 * These will all fail silently if the value given is invalid, or the
1409 	 * capability isn't available on the given interface
1410 	 */
1411 	if (mailled >= 0)
1412 		set_u32(mailled, ACER_CAP_MAILLED);
1413 	if (!has_type_aa && threeg >= 0)
1414 		set_u32(threeg, ACER_CAP_THREEG);
1415 	if (brightness >= 0)
1416 		set_u32(brightness, ACER_CAP_BRIGHTNESS);
1417 }
1418 
1419 /*
1420  * LED device (Mail LED only, no other LEDs known yet)
1421  */
1422 static void mail_led_set(struct led_classdev *led_cdev,
1423 enum led_brightness value)
1424 {
1425 	set_u32(value, ACER_CAP_MAILLED);
1426 }
1427 
1428 static struct led_classdev mail_led = {
1429 	.name = "acer-wmi::mail",
1430 	.brightness_set = mail_led_set,
1431 };
1432 
1433 static int acer_led_init(struct device *dev)
1434 {
1435 	return led_classdev_register(dev, &mail_led);
1436 }
1437 
1438 static void acer_led_exit(void)
1439 {
1440 	set_u32(LED_OFF, ACER_CAP_MAILLED);
1441 	led_classdev_unregister(&mail_led);
1442 }
1443 
1444 /*
1445  * Backlight device
1446  */
1447 static struct backlight_device *acer_backlight_device;
1448 
1449 static int read_brightness(struct backlight_device *bd)
1450 {
1451 	u32 value;
1452 	get_u32(&value, ACER_CAP_BRIGHTNESS);
1453 	return value;
1454 }
1455 
1456 static int update_bl_status(struct backlight_device *bd)
1457 {
1458 	int intensity = bd->props.brightness;
1459 
1460 	if (bd->props.power != FB_BLANK_UNBLANK)
1461 		intensity = 0;
1462 	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
1463 		intensity = 0;
1464 
1465 	set_u32(intensity, ACER_CAP_BRIGHTNESS);
1466 
1467 	return 0;
1468 }
1469 
1470 static const struct backlight_ops acer_bl_ops = {
1471 	.get_brightness = read_brightness,
1472 	.update_status = update_bl_status,
1473 };
1474 
1475 static int acer_backlight_init(struct device *dev)
1476 {
1477 	struct backlight_properties props;
1478 	struct backlight_device *bd;
1479 
1480 	memset(&props, 0, sizeof(struct backlight_properties));
1481 	props.type = BACKLIGHT_PLATFORM;
1482 	props.max_brightness = max_brightness;
1483 	bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops,
1484 				       &props);
1485 	if (IS_ERR(bd)) {
1486 		pr_err("Could not register Acer backlight device\n");
1487 		acer_backlight_device = NULL;
1488 		return PTR_ERR(bd);
1489 	}
1490 
1491 	acer_backlight_device = bd;
1492 
1493 	bd->props.power = FB_BLANK_UNBLANK;
1494 	bd->props.brightness = read_brightness(bd);
1495 	backlight_update_status(bd);
1496 	return 0;
1497 }
1498 
1499 static void acer_backlight_exit(void)
1500 {
1501 	backlight_device_unregister(acer_backlight_device);
1502 }
1503 
1504 /*
1505  * Accelerometer device
1506  */
1507 static acpi_handle gsensor_handle;
1508 
1509 static int acer_gsensor_init(void)
1510 {
1511 	acpi_status status;
1512 	struct acpi_buffer output;
1513 	union acpi_object out_obj;
1514 
1515 	output.length = sizeof(out_obj);
1516 	output.pointer = &out_obj;
1517 	status = acpi_evaluate_object(gsensor_handle, "_INI", NULL, &output);
1518 	if (ACPI_FAILURE(status))
1519 		return -1;
1520 
1521 	return 0;
1522 }
1523 
1524 static int acer_gsensor_open(struct input_dev *input)
1525 {
1526 	return acer_gsensor_init();
1527 }
1528 
1529 static int acer_gsensor_event(void)
1530 {
1531 	acpi_status status;
1532 	struct acpi_buffer output;
1533 	union acpi_object out_obj[5];
1534 
1535 	if (!has_cap(ACER_CAP_ACCEL))
1536 		return -1;
1537 
1538 	output.length = sizeof(out_obj);
1539 	output.pointer = out_obj;
1540 
1541 	status = acpi_evaluate_object(gsensor_handle, "RDVL", NULL, &output);
1542 	if (ACPI_FAILURE(status))
1543 		return -1;
1544 
1545 	if (out_obj->package.count != 4)
1546 		return -1;
1547 
1548 	input_report_abs(acer_wmi_accel_dev, ABS_X,
1549 		(s16)out_obj->package.elements[0].integer.value);
1550 	input_report_abs(acer_wmi_accel_dev, ABS_Y,
1551 		(s16)out_obj->package.elements[1].integer.value);
1552 	input_report_abs(acer_wmi_accel_dev, ABS_Z,
1553 		(s16)out_obj->package.elements[2].integer.value);
1554 	input_sync(acer_wmi_accel_dev);
1555 	return 0;
1556 }
1557 
1558 /*
1559  * Rfkill devices
1560  */
1561 static void acer_rfkill_update(struct work_struct *ignored);
1562 static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
1563 static void acer_rfkill_update(struct work_struct *ignored)
1564 {
1565 	u32 state;
1566 	acpi_status status;
1567 
1568 	if (has_cap(ACER_CAP_WIRELESS)) {
1569 		status = get_u32(&state, ACER_CAP_WIRELESS);
1570 		if (ACPI_SUCCESS(status)) {
1571 			if (quirks->wireless == 3)
1572 				rfkill_set_hw_state(wireless_rfkill, !state);
1573 			else
1574 				rfkill_set_sw_state(wireless_rfkill, !state);
1575 		}
1576 	}
1577 
1578 	if (has_cap(ACER_CAP_BLUETOOTH)) {
1579 		status = get_u32(&state, ACER_CAP_BLUETOOTH);
1580 		if (ACPI_SUCCESS(status))
1581 			rfkill_set_sw_state(bluetooth_rfkill, !state);
1582 	}
1583 
1584 	if (has_cap(ACER_CAP_THREEG) && wmi_has_guid(WMID_GUID3)) {
1585 		status = get_u32(&state, ACER_WMID3_GDS_THREEG);
1586 		if (ACPI_SUCCESS(status))
1587 			rfkill_set_sw_state(threeg_rfkill, !state);
1588 	}
1589 
1590 	schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1591 }
1592 
1593 static int acer_rfkill_set(void *data, bool blocked)
1594 {
1595 	acpi_status status;
1596 	u32 cap = (unsigned long)data;
1597 
1598 	if (rfkill_inited) {
1599 		status = set_u32(!blocked, cap);
1600 		if (ACPI_FAILURE(status))
1601 			return -ENODEV;
1602 	}
1603 
1604 	return 0;
1605 }
1606 
1607 static const struct rfkill_ops acer_rfkill_ops = {
1608 	.set_block = acer_rfkill_set,
1609 };
1610 
1611 static struct rfkill *acer_rfkill_register(struct device *dev,
1612 					   enum rfkill_type type,
1613 					   char *name, u32 cap)
1614 {
1615 	int err;
1616 	struct rfkill *rfkill_dev;
1617 	u32 state;
1618 	acpi_status status;
1619 
1620 	rfkill_dev = rfkill_alloc(name, dev, type,
1621 				  &acer_rfkill_ops,
1622 				  (void *)(unsigned long)cap);
1623 	if (!rfkill_dev)
1624 		return ERR_PTR(-ENOMEM);
1625 
1626 	status = get_u32(&state, cap);
1627 
1628 	err = rfkill_register(rfkill_dev);
1629 	if (err) {
1630 		rfkill_destroy(rfkill_dev);
1631 		return ERR_PTR(err);
1632 	}
1633 
1634 	if (ACPI_SUCCESS(status))
1635 		rfkill_set_sw_state(rfkill_dev, !state);
1636 
1637 	return rfkill_dev;
1638 }
1639 
1640 static int acer_rfkill_init(struct device *dev)
1641 {
1642 	int err;
1643 
1644 	if (has_cap(ACER_CAP_WIRELESS)) {
1645 		wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1646 			"acer-wireless", ACER_CAP_WIRELESS);
1647 		if (IS_ERR(wireless_rfkill)) {
1648 			err = PTR_ERR(wireless_rfkill);
1649 			goto error_wireless;
1650 		}
1651 	}
1652 
1653 	if (has_cap(ACER_CAP_BLUETOOTH)) {
1654 		bluetooth_rfkill = acer_rfkill_register(dev,
1655 			RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1656 			ACER_CAP_BLUETOOTH);
1657 		if (IS_ERR(bluetooth_rfkill)) {
1658 			err = PTR_ERR(bluetooth_rfkill);
1659 			goto error_bluetooth;
1660 		}
1661 	}
1662 
1663 	if (has_cap(ACER_CAP_THREEG)) {
1664 		threeg_rfkill = acer_rfkill_register(dev,
1665 			RFKILL_TYPE_WWAN, "acer-threeg",
1666 			ACER_CAP_THREEG);
1667 		if (IS_ERR(threeg_rfkill)) {
1668 			err = PTR_ERR(threeg_rfkill);
1669 			goto error_threeg;
1670 		}
1671 	}
1672 
1673 	rfkill_inited = true;
1674 
1675 	if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1676 	    has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1677 		schedule_delayed_work(&acer_rfkill_work,
1678 			round_jiffies_relative(HZ));
1679 
1680 	return 0;
1681 
1682 error_threeg:
1683 	if (has_cap(ACER_CAP_BLUETOOTH)) {
1684 		rfkill_unregister(bluetooth_rfkill);
1685 		rfkill_destroy(bluetooth_rfkill);
1686 	}
1687 error_bluetooth:
1688 	if (has_cap(ACER_CAP_WIRELESS)) {
1689 		rfkill_unregister(wireless_rfkill);
1690 		rfkill_destroy(wireless_rfkill);
1691 	}
1692 error_wireless:
1693 	return err;
1694 }
1695 
1696 static void acer_rfkill_exit(void)
1697 {
1698 	if ((ec_raw_mode || !wmi_has_guid(ACERWMID_EVENT_GUID)) &&
1699 	    has_cap(ACER_CAP_WIRELESS | ACER_CAP_BLUETOOTH | ACER_CAP_THREEG))
1700 		cancel_delayed_work_sync(&acer_rfkill_work);
1701 
1702 	if (has_cap(ACER_CAP_WIRELESS)) {
1703 		rfkill_unregister(wireless_rfkill);
1704 		rfkill_destroy(wireless_rfkill);
1705 	}
1706 
1707 	if (has_cap(ACER_CAP_BLUETOOTH)) {
1708 		rfkill_unregister(bluetooth_rfkill);
1709 		rfkill_destroy(bluetooth_rfkill);
1710 	}
1711 
1712 	if (has_cap(ACER_CAP_THREEG)) {
1713 		rfkill_unregister(threeg_rfkill);
1714 		rfkill_destroy(threeg_rfkill);
1715 	}
1716 	return;
1717 }
1718 
1719 static void acer_wmi_notify(u32 value, void *context)
1720 {
1721 	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1722 	union acpi_object *obj;
1723 	struct event_return_value return_value;
1724 	acpi_status status;
1725 	u16 device_state;
1726 	const struct key_entry *key;
1727 	u32 scancode;
1728 
1729 	status = wmi_get_event_data(value, &response);
1730 	if (status != AE_OK) {
1731 		pr_warn("bad event status 0x%x\n", status);
1732 		return;
1733 	}
1734 
1735 	obj = (union acpi_object *)response.pointer;
1736 
1737 	if (!obj)
1738 		return;
1739 	if (obj->type != ACPI_TYPE_BUFFER) {
1740 		pr_warn("Unknown response received %d\n", obj->type);
1741 		kfree(obj);
1742 		return;
1743 	}
1744 	if (obj->buffer.length != 8) {
1745 		pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1746 		kfree(obj);
1747 		return;
1748 	}
1749 
1750 	return_value = *((struct event_return_value *)obj->buffer.pointer);
1751 	kfree(obj);
1752 
1753 	switch (return_value.function) {
1754 	case WMID_HOTKEY_EVENT:
1755 		device_state = return_value.device_state;
1756 		pr_debug("device state: 0x%x\n", device_state);
1757 
1758 		key = sparse_keymap_entry_from_scancode(acer_wmi_input_dev,
1759 							return_value.key_num);
1760 		if (!key) {
1761 			pr_warn("Unknown key number - 0x%x\n",
1762 				return_value.key_num);
1763 		} else {
1764 			scancode = return_value.key_num;
1765 			switch (key->keycode) {
1766 			case KEY_WLAN:
1767 			case KEY_BLUETOOTH:
1768 				if (has_cap(ACER_CAP_WIRELESS))
1769 					rfkill_set_sw_state(wireless_rfkill,
1770 						!(device_state & ACER_WMID3_GDS_WIRELESS));
1771 				if (has_cap(ACER_CAP_THREEG))
1772 					rfkill_set_sw_state(threeg_rfkill,
1773 						!(device_state & ACER_WMID3_GDS_THREEG));
1774 				if (has_cap(ACER_CAP_BLUETOOTH))
1775 					rfkill_set_sw_state(bluetooth_rfkill,
1776 						!(device_state & ACER_WMID3_GDS_BLUETOOTH));
1777 				break;
1778 			case KEY_TOUCHPAD_TOGGLE:
1779 				scancode = (device_state & ACER_WMID3_GDS_TOUCHPAD) ?
1780 						KEY_TOUCHPAD_ON : KEY_TOUCHPAD_OFF;
1781 			}
1782 			sparse_keymap_report_event(acer_wmi_input_dev, scancode, 1, true);
1783 		}
1784 		break;
1785 	case WMID_ACCEL_EVENT:
1786 		acer_gsensor_event();
1787 		break;
1788 	default:
1789 		pr_warn("Unknown function number - %d - %d\n",
1790 			return_value.function, return_value.key_num);
1791 		break;
1792 	}
1793 }
1794 
1795 static acpi_status __init
1796 wmid3_set_function_mode(struct func_input_params *params,
1797 			struct func_return_value *return_value)
1798 {
1799 	acpi_status status;
1800 	union acpi_object *obj;
1801 
1802 	struct acpi_buffer input = { sizeof(struct func_input_params), params };
1803 	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1804 
1805 	status = wmi_evaluate_method(WMID_GUID3, 0, 0x1, &input, &output);
1806 	if (ACPI_FAILURE(status))
1807 		return status;
1808 
1809 	obj = output.pointer;
1810 
1811 	if (!obj)
1812 		return AE_ERROR;
1813 	else if (obj->type != ACPI_TYPE_BUFFER) {
1814 		kfree(obj);
1815 		return AE_ERROR;
1816 	}
1817 	if (obj->buffer.length != 4) {
1818 		pr_warn("Unknown buffer length %d\n", obj->buffer.length);
1819 		kfree(obj);
1820 		return AE_ERROR;
1821 	}
1822 
1823 	*return_value = *((struct func_return_value *)obj->buffer.pointer);
1824 	kfree(obj);
1825 
1826 	return status;
1827 }
1828 
1829 static int __init acer_wmi_enable_ec_raw(void)
1830 {
1831 	struct func_return_value return_value;
1832 	acpi_status status;
1833 	struct func_input_params params = {
1834 		.function_num = 0x1,
1835 		.commun_devices = 0xFFFF,
1836 		.devices = 0xFFFF,
1837 		.app_status = 0x00,		/* Launch Manager Deactive */
1838 		.app_mask = 0x01,
1839 	};
1840 
1841 	status = wmid3_set_function_mode(&params, &return_value);
1842 
1843 	if (return_value.error_code || return_value.ec_return_value)
1844 		pr_warn("Enabling EC raw mode failed: 0x%x - 0x%x\n",
1845 			return_value.error_code,
1846 			return_value.ec_return_value);
1847 	else
1848 		pr_info("Enabled EC raw mode\n");
1849 
1850 	return status;
1851 }
1852 
1853 static int __init acer_wmi_enable_lm(void)
1854 {
1855 	struct func_return_value return_value;
1856 	acpi_status status;
1857 	struct func_input_params params = {
1858 		.function_num = 0x1,
1859 		.commun_devices = 0xFFFF,
1860 		.devices = 0xFFFF,
1861 		.app_status = 0x01,            /* Launch Manager Active */
1862 		.app_mask = 0x01,
1863 	};
1864 
1865 	status = wmid3_set_function_mode(&params, &return_value);
1866 
1867 	if (return_value.error_code || return_value.ec_return_value)
1868 		pr_warn("Enabling Launch Manager failed: 0x%x - 0x%x\n",
1869 			return_value.error_code,
1870 			return_value.ec_return_value);
1871 
1872 	return status;
1873 }
1874 
1875 static int __init acer_wmi_enable_rf_button(void)
1876 {
1877 	struct func_return_value return_value;
1878 	acpi_status status;
1879 	struct func_input_params params = {
1880 		.function_num = 0x1,
1881 		.commun_devices = 0xFFFF,
1882 		.devices = 0xFFFF,
1883 		.app_status = 0x10,            /* RF Button Active */
1884 		.app_mask = 0x10,
1885 	};
1886 
1887 	status = wmid3_set_function_mode(&params, &return_value);
1888 
1889 	if (return_value.error_code || return_value.ec_return_value)
1890 		pr_warn("Enabling RF Button failed: 0x%x - 0x%x\n",
1891 			return_value.error_code,
1892 			return_value.ec_return_value);
1893 
1894 	return status;
1895 }
1896 
1897 #define ACER_WMID_ACCEL_HID	"BST0001"
1898 
1899 static acpi_status __init acer_wmi_get_handle_cb(acpi_handle ah, u32 level,
1900 						void *ctx, void **retval)
1901 {
1902 	struct acpi_device *dev;
1903 
1904 	if (!strcmp(ctx, "SENR")) {
1905 		if (acpi_bus_get_device(ah, &dev))
1906 			return AE_OK;
1907 		if (strcmp(ACER_WMID_ACCEL_HID, acpi_device_hid(dev)))
1908 			return AE_OK;
1909 	} else
1910 		return AE_OK;
1911 
1912 	*(acpi_handle *)retval = ah;
1913 
1914 	return AE_CTRL_TERMINATE;
1915 }
1916 
1917 static int __init acer_wmi_get_handle(const char *name, const char *prop,
1918 					acpi_handle *ah)
1919 {
1920 	acpi_status status;
1921 	acpi_handle handle;
1922 
1923 	BUG_ON(!name || !ah);
1924 
1925 	handle = NULL;
1926 	status = acpi_get_devices(prop, acer_wmi_get_handle_cb,
1927 					(void *)name, &handle);
1928 	if (ACPI_SUCCESS(status) && handle) {
1929 		*ah = handle;
1930 		return 0;
1931 	} else {
1932 		return -ENODEV;
1933 	}
1934 }
1935 
1936 static int __init acer_wmi_accel_setup(void)
1937 {
1938 	int err;
1939 
1940 	err = acer_wmi_get_handle("SENR", ACER_WMID_ACCEL_HID, &gsensor_handle);
1941 	if (err)
1942 		return err;
1943 
1944 	interface->capability |= ACER_CAP_ACCEL;
1945 
1946 	acer_wmi_accel_dev = input_allocate_device();
1947 	if (!acer_wmi_accel_dev)
1948 		return -ENOMEM;
1949 
1950 	acer_wmi_accel_dev->open = acer_gsensor_open;
1951 
1952 	acer_wmi_accel_dev->name = "Acer BMA150 accelerometer";
1953 	acer_wmi_accel_dev->phys = "wmi/input1";
1954 	acer_wmi_accel_dev->id.bustype = BUS_HOST;
1955 	acer_wmi_accel_dev->evbit[0] = BIT_MASK(EV_ABS);
1956 	input_set_abs_params(acer_wmi_accel_dev, ABS_X, -16384, 16384, 0, 0);
1957 	input_set_abs_params(acer_wmi_accel_dev, ABS_Y, -16384, 16384, 0, 0);
1958 	input_set_abs_params(acer_wmi_accel_dev, ABS_Z, -16384, 16384, 0, 0);
1959 
1960 	err = input_register_device(acer_wmi_accel_dev);
1961 	if (err)
1962 		goto err_free_dev;
1963 
1964 	return 0;
1965 
1966 err_free_dev:
1967 	input_free_device(acer_wmi_accel_dev);
1968 	return err;
1969 }
1970 
1971 static void acer_wmi_accel_destroy(void)
1972 {
1973 	input_unregister_device(acer_wmi_accel_dev);
1974 }
1975 
1976 static int __init acer_wmi_input_setup(void)
1977 {
1978 	acpi_status status;
1979 	int err;
1980 
1981 	acer_wmi_input_dev = input_allocate_device();
1982 	if (!acer_wmi_input_dev)
1983 		return -ENOMEM;
1984 
1985 	acer_wmi_input_dev->name = "Acer WMI hotkeys";
1986 	acer_wmi_input_dev->phys = "wmi/input0";
1987 	acer_wmi_input_dev->id.bustype = BUS_HOST;
1988 
1989 	err = sparse_keymap_setup(acer_wmi_input_dev, acer_wmi_keymap, NULL);
1990 	if (err)
1991 		goto err_free_dev;
1992 
1993 	status = wmi_install_notify_handler(ACERWMID_EVENT_GUID,
1994 						acer_wmi_notify, NULL);
1995 	if (ACPI_FAILURE(status)) {
1996 		err = -EIO;
1997 		goto err_free_dev;
1998 	}
1999 
2000 	err = input_register_device(acer_wmi_input_dev);
2001 	if (err)
2002 		goto err_uninstall_notifier;
2003 
2004 	return 0;
2005 
2006 err_uninstall_notifier:
2007 	wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
2008 err_free_dev:
2009 	input_free_device(acer_wmi_input_dev);
2010 	return err;
2011 }
2012 
2013 static void acer_wmi_input_destroy(void)
2014 {
2015 	wmi_remove_notify_handler(ACERWMID_EVENT_GUID);
2016 	input_unregister_device(acer_wmi_input_dev);
2017 }
2018 
2019 /*
2020  * debugfs functions
2021  */
2022 static u32 get_wmid_devices(void)
2023 {
2024 	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
2025 	union acpi_object *obj;
2026 	acpi_status status;
2027 	u32 devices = 0;
2028 
2029 	status = wmi_query_block(WMID_GUID2, 0, &out);
2030 	if (ACPI_FAILURE(status))
2031 		return 0;
2032 
2033 	obj = (union acpi_object *) out.pointer;
2034 	if (obj) {
2035 		if (obj->type == ACPI_TYPE_BUFFER &&
2036 			(obj->buffer.length == sizeof(u32) ||
2037 			obj->buffer.length == sizeof(u64))) {
2038 			devices = *((u32 *) obj->buffer.pointer);
2039 		} else if (obj->type == ACPI_TYPE_INTEGER) {
2040 			devices = (u32) obj->integer.value;
2041 		}
2042 	}
2043 
2044 	kfree(out.pointer);
2045 	return devices;
2046 }
2047 
2048 /*
2049  * Platform device
2050  */
2051 static int acer_platform_probe(struct platform_device *device)
2052 {
2053 	int err;
2054 
2055 	if (has_cap(ACER_CAP_MAILLED)) {
2056 		err = acer_led_init(&device->dev);
2057 		if (err)
2058 			goto error_mailled;
2059 	}
2060 
2061 	if (has_cap(ACER_CAP_BRIGHTNESS)) {
2062 		err = acer_backlight_init(&device->dev);
2063 		if (err)
2064 			goto error_brightness;
2065 	}
2066 
2067 	err = acer_rfkill_init(&device->dev);
2068 	if (err)
2069 		goto error_rfkill;
2070 
2071 	return err;
2072 
2073 error_rfkill:
2074 	if (has_cap(ACER_CAP_BRIGHTNESS))
2075 		acer_backlight_exit();
2076 error_brightness:
2077 	if (has_cap(ACER_CAP_MAILLED))
2078 		acer_led_exit();
2079 error_mailled:
2080 	return err;
2081 }
2082 
2083 static int acer_platform_remove(struct platform_device *device)
2084 {
2085 	if (has_cap(ACER_CAP_MAILLED))
2086 		acer_led_exit();
2087 	if (has_cap(ACER_CAP_BRIGHTNESS))
2088 		acer_backlight_exit();
2089 
2090 	acer_rfkill_exit();
2091 	return 0;
2092 }
2093 
2094 #ifdef CONFIG_PM_SLEEP
2095 static int acer_suspend(struct device *dev)
2096 {
2097 	u32 value;
2098 	struct acer_data *data = &interface->data;
2099 
2100 	if (!data)
2101 		return -ENOMEM;
2102 
2103 	if (has_cap(ACER_CAP_MAILLED)) {
2104 		get_u32(&value, ACER_CAP_MAILLED);
2105 		set_u32(LED_OFF, ACER_CAP_MAILLED);
2106 		data->mailled = value;
2107 	}
2108 
2109 	if (has_cap(ACER_CAP_BRIGHTNESS)) {
2110 		get_u32(&value, ACER_CAP_BRIGHTNESS);
2111 		data->brightness = value;
2112 	}
2113 
2114 	return 0;
2115 }
2116 
2117 static int acer_resume(struct device *dev)
2118 {
2119 	struct acer_data *data = &interface->data;
2120 
2121 	if (!data)
2122 		return -ENOMEM;
2123 
2124 	if (has_cap(ACER_CAP_MAILLED))
2125 		set_u32(data->mailled, ACER_CAP_MAILLED);
2126 
2127 	if (has_cap(ACER_CAP_BRIGHTNESS))
2128 		set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
2129 
2130 	if (has_cap(ACER_CAP_ACCEL))
2131 		acer_gsensor_init();
2132 
2133 	return 0;
2134 }
2135 #else
2136 #define acer_suspend	NULL
2137 #define acer_resume	NULL
2138 #endif
2139 
2140 static SIMPLE_DEV_PM_OPS(acer_pm, acer_suspend, acer_resume);
2141 
2142 static void acer_platform_shutdown(struct platform_device *device)
2143 {
2144 	struct acer_data *data = &interface->data;
2145 
2146 	if (!data)
2147 		return;
2148 
2149 	if (has_cap(ACER_CAP_MAILLED))
2150 		set_u32(LED_OFF, ACER_CAP_MAILLED);
2151 }
2152 
2153 static struct platform_driver acer_platform_driver = {
2154 	.driver = {
2155 		.name = "acer-wmi",
2156 		.pm = &acer_pm,
2157 	},
2158 	.probe = acer_platform_probe,
2159 	.remove = acer_platform_remove,
2160 	.shutdown = acer_platform_shutdown,
2161 };
2162 
2163 static struct platform_device *acer_platform_device;
2164 
2165 static void remove_debugfs(void)
2166 {
2167 	debugfs_remove(interface->debug.devices);
2168 	debugfs_remove(interface->debug.root);
2169 }
2170 
2171 static int __init create_debugfs(void)
2172 {
2173 	interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
2174 	if (!interface->debug.root) {
2175 		pr_err("Failed to create debugfs directory");
2176 		return -ENOMEM;
2177 	}
2178 
2179 	interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
2180 					interface->debug.root,
2181 					&interface->debug.wmid_devices);
2182 	if (!interface->debug.devices)
2183 		goto error_debugfs;
2184 
2185 	return 0;
2186 
2187 error_debugfs:
2188 	remove_debugfs();
2189 	return -ENOMEM;
2190 }
2191 
2192 static int __init acer_wmi_init(void)
2193 {
2194 	int err;
2195 
2196 	pr_info("Acer Laptop ACPI-WMI Extras\n");
2197 
2198 	if (dmi_check_system(acer_blacklist)) {
2199 		pr_info("Blacklisted hardware detected - not loading\n");
2200 		return -ENODEV;
2201 	}
2202 
2203 	find_quirks();
2204 
2205 	/*
2206 	 * The AMW0_GUID1 wmi is not only found on Acer family but also other
2207 	 * machines like Lenovo, Fujitsu and Medion. In the past days,
2208 	 * acer-wmi driver handled those non-Acer machines by quirks list.
2209 	 * But actually acer-wmi driver was loaded on any machines that have
2210 	 * AMW0_GUID1. This behavior is strange because those machines should
2211 	 * be supported by appropriate wmi drivers. e.g. fujitsu-laptop,
2212 	 * ideapad-laptop. So, here checks the machine that has AMW0_GUID1
2213 	 * should be in Acer/Gateway/Packard Bell white list, or it's already
2214 	 * in the past quirk list.
2215 	 */
2216 	if (wmi_has_guid(AMW0_GUID1) &&
2217 	    !dmi_check_system(amw0_whitelist) &&
2218 	    quirks == &quirk_unknown) {
2219 		pr_err("Unsupported machine has AMW0_GUID1, unable to load\n");
2220 		return -ENODEV;
2221 	}
2222 
2223 	/*
2224 	 * Detect which ACPI-WMI interface we're using.
2225 	 */
2226 	if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2227 		interface = &AMW0_V2_interface;
2228 
2229 	if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
2230 		interface = &wmid_interface;
2231 
2232 	if (wmi_has_guid(WMID_GUID3))
2233 		interface = &wmid_v2_interface;
2234 
2235 	if (interface)
2236 		dmi_walk(type_aa_dmi_decode, NULL);
2237 
2238 	if (wmi_has_guid(WMID_GUID2) && interface) {
2239 		if (!has_type_aa && ACPI_FAILURE(WMID_set_capabilities())) {
2240 			pr_err("Unable to detect available WMID devices\n");
2241 			return -ENODEV;
2242 		}
2243 		/* WMID always provides brightness methods */
2244 		interface->capability |= ACER_CAP_BRIGHTNESS;
2245 	} else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
2246 		pr_err("No WMID device detection method found\n");
2247 		return -ENODEV;
2248 	}
2249 
2250 	if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
2251 		interface = &AMW0_interface;
2252 
2253 		if (ACPI_FAILURE(AMW0_set_capabilities())) {
2254 			pr_err("Unable to detect available AMW0 devices\n");
2255 			return -ENODEV;
2256 		}
2257 	}
2258 
2259 	if (wmi_has_guid(AMW0_GUID1))
2260 		AMW0_find_mailled();
2261 
2262 	if (!interface) {
2263 		pr_err("No or unsupported WMI interface, unable to load\n");
2264 		return -ENODEV;
2265 	}
2266 
2267 	set_quirks();
2268 
2269 	if (dmi_check_system(video_vendor_dmi_table))
2270 		acpi_video_set_dmi_backlight_type(acpi_backlight_vendor);
2271 
2272 	if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
2273 		interface->capability &= ~ACER_CAP_BRIGHTNESS;
2274 
2275 	if (wmi_has_guid(WMID_GUID3)) {
2276 		if (ACPI_FAILURE(acer_wmi_enable_rf_button()))
2277 			pr_warn("Cannot enable RF Button Driver\n");
2278 
2279 		if (ec_raw_mode) {
2280 			if (ACPI_FAILURE(acer_wmi_enable_ec_raw())) {
2281 				pr_err("Cannot enable EC raw mode\n");
2282 				return -ENODEV;
2283 			}
2284 		} else if (ACPI_FAILURE(acer_wmi_enable_lm())) {
2285 			pr_err("Cannot enable Launch Manager mode\n");
2286 			return -ENODEV;
2287 		}
2288 	} else if (ec_raw_mode) {
2289 		pr_info("No WMID EC raw mode enable method\n");
2290 	}
2291 
2292 	if (wmi_has_guid(ACERWMID_EVENT_GUID)) {
2293 		err = acer_wmi_input_setup();
2294 		if (err)
2295 			return err;
2296 		err = acer_wmi_accel_setup();
2297 		if (err && err != -ENODEV)
2298 			pr_warn("Cannot enable accelerometer\n");
2299 	}
2300 
2301 	err = platform_driver_register(&acer_platform_driver);
2302 	if (err) {
2303 		pr_err("Unable to register platform driver\n");
2304 		goto error_platform_register;
2305 	}
2306 
2307 	acer_platform_device = platform_device_alloc("acer-wmi", -1);
2308 	if (!acer_platform_device) {
2309 		err = -ENOMEM;
2310 		goto error_device_alloc;
2311 	}
2312 
2313 	err = platform_device_add(acer_platform_device);
2314 	if (err)
2315 		goto error_device_add;
2316 
2317 	if (wmi_has_guid(WMID_GUID2)) {
2318 		interface->debug.wmid_devices = get_wmid_devices();
2319 		err = create_debugfs();
2320 		if (err)
2321 			goto error_create_debugfs;
2322 	}
2323 
2324 	/* Override any initial settings with values from the commandline */
2325 	acer_commandline_init();
2326 
2327 	return 0;
2328 
2329 error_create_debugfs:
2330 	platform_device_del(acer_platform_device);
2331 error_device_add:
2332 	platform_device_put(acer_platform_device);
2333 error_device_alloc:
2334 	platform_driver_unregister(&acer_platform_driver);
2335 error_platform_register:
2336 	if (wmi_has_guid(ACERWMID_EVENT_GUID))
2337 		acer_wmi_input_destroy();
2338 	if (has_cap(ACER_CAP_ACCEL))
2339 		acer_wmi_accel_destroy();
2340 
2341 	return err;
2342 }
2343 
2344 static void __exit acer_wmi_exit(void)
2345 {
2346 	if (wmi_has_guid(ACERWMID_EVENT_GUID))
2347 		acer_wmi_input_destroy();
2348 
2349 	if (has_cap(ACER_CAP_ACCEL))
2350 		acer_wmi_accel_destroy();
2351 
2352 	remove_debugfs();
2353 	platform_device_unregister(acer_platform_device);
2354 	platform_driver_unregister(&acer_platform_driver);
2355 
2356 	pr_info("Acer Laptop WMI Extras unloaded\n");
2357 	return;
2358 }
2359 
2360 module_init(acer_wmi_init);
2361 module_exit(acer_wmi_exit);
2362