acer-wmi.c revision 19d337dff95cbf76edd3ad95c0cee2732c3e1ec5 
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#include <linux/kernel.h>
26#include <linux/module.h>
27#include <linux/init.h>
28#include <linux/types.h>
29#include <linux/dmi.h>
30#include <linux/fb.h>
31#include <linux/backlight.h>
32#include <linux/leds.h>
33#include <linux/platform_device.h>
34#include <linux/acpi.h>
35#include <linux/i8042.h>
36#include <linux/rfkill.h>
37#include <linux/workqueue.h>
38#include <linux/debugfs.h>
39
40#include <acpi/acpi_drivers.h>
41
42MODULE_AUTHOR("Carlos Corbacho");
43MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
44MODULE_LICENSE("GPL");
45
46#define ACER_LOGPREFIX "acer-wmi: "
47#define ACER_ERR KERN_ERR ACER_LOGPREFIX
48#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
49#define ACER_INFO KERN_INFO ACER_LOGPREFIX
50
51/*
52 * The following defines quirks to get some specific functions to work
53 * which are known to not be supported over ACPI-WMI (such as the mail LED
54 * on WMID based Acer's)
55 */
56struct acer_quirks {
57	const char *vendor;
58	const char *model;
59	u16 quirks;
60};
61
62/*
63 * Magic Number
64 * Meaning is unknown - this number is required for writing to ACPI for AMW0
65 * (it's also used in acerhk when directly accessing the BIOS)
66 */
67#define ACER_AMW0_WRITE	0x9610
68
69/*
70 * Bit masks for the AMW0 interface
71 */
72#define ACER_AMW0_WIRELESS_MASK  0x35
73#define ACER_AMW0_BLUETOOTH_MASK 0x34
74#define ACER_AMW0_MAILLED_MASK   0x31
75
76/*
77 * Method IDs for WMID interface
78 */
79#define ACER_WMID_GET_WIRELESS_METHODID		1
80#define ACER_WMID_GET_BLUETOOTH_METHODID	2
81#define ACER_WMID_GET_BRIGHTNESS_METHODID	3
82#define ACER_WMID_SET_WIRELESS_METHODID		4
83#define ACER_WMID_SET_BLUETOOTH_METHODID	5
84#define ACER_WMID_SET_BRIGHTNESS_METHODID	6
85#define ACER_WMID_GET_THREEG_METHODID		10
86#define ACER_WMID_SET_THREEG_METHODID		11
87
88/*
89 * Acer ACPI method GUIDs
90 */
91#define AMW0_GUID1		"67C3371D-95A3-4C37-BB61-DD47B491DAAB"
92#define AMW0_GUID2		"431F16ED-0C2B-444C-B267-27DEB140CF9C"
93#define WMID_GUID1		"6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
94#define WMID_GUID2		"95764E09-FB56-4e83-B31A-37761F60994A"
95
96MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
97MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
98
99/* Temporary workaround until the WMI sysfs interface goes in */
100MODULE_ALIAS("dmi:*:*Acer*:*:");
101
102/*
103 * Interface capability flags
104 */
105#define ACER_CAP_MAILLED		(1<<0)
106#define ACER_CAP_WIRELESS		(1<<1)
107#define ACER_CAP_BLUETOOTH		(1<<2)
108#define ACER_CAP_BRIGHTNESS		(1<<3)
109#define ACER_CAP_THREEG			(1<<4)
110#define ACER_CAP_ANY			(0xFFFFFFFF)
111
112/*
113 * Interface type flags
114 */
115enum interface_flags {
116	ACER_AMW0,
117	ACER_AMW0_V2,
118	ACER_WMID,
119};
120
121#define ACER_DEFAULT_WIRELESS  0
122#define ACER_DEFAULT_BLUETOOTH 0
123#define ACER_DEFAULT_MAILLED   0
124#define ACER_DEFAULT_THREEG    0
125
126static int max_brightness = 0xF;
127
128static int mailled = -1;
129static int brightness = -1;
130static int threeg = -1;
131static int force_series;
132
133module_param(mailled, int, 0444);
134module_param(brightness, int, 0444);
135module_param(threeg, int, 0444);
136module_param(force_series, int, 0444);
137MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
138MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
139MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
140MODULE_PARM_DESC(force_series, "Force a different laptop series");
141
142struct acer_data {
143	int mailled;
144	int threeg;
145	int brightness;
146};
147
148struct acer_debug {
149	struct dentry *root;
150	struct dentry *devices;
151	u32 wmid_devices;
152};
153
154static struct rfkill *wireless_rfkill;
155static struct rfkill *bluetooth_rfkill;
156
157/* Each low-level interface must define at least some of the following */
158struct wmi_interface {
159	/* The WMI device type */
160	u32 type;
161
162	/* The capabilities this interface provides */
163	u32 capability;
164
165	/* Private data for the current interface */
166	struct acer_data data;
167
168	/* debugfs entries associated with this interface */
169	struct acer_debug debug;
170};
171
172/* The static interface pointer, points to the currently detected interface */
173static struct wmi_interface *interface;
174
175/*
176 * Embedded Controller quirks
177 * Some laptops require us to directly access the EC to either enable or query
178 * features that are not available through WMI.
179 */
180
181struct quirk_entry {
182	u8 wireless;
183	u8 mailled;
184	s8 brightness;
185	u8 bluetooth;
186};
187
188static struct quirk_entry *quirks;
189
190static void set_quirks(void)
191{
192	if (!interface)
193		return;
194
195	if (quirks->mailled)
196		interface->capability |= ACER_CAP_MAILLED;
197
198	if (quirks->brightness)
199		interface->capability |= ACER_CAP_BRIGHTNESS;
200}
201
202static int dmi_matched(const struct dmi_system_id *dmi)
203{
204	quirks = dmi->driver_data;
205	return 0;
206}
207
208static struct quirk_entry quirk_unknown = {
209};
210
211static struct quirk_entry quirk_acer_aspire_1520 = {
212	.brightness = -1,
213};
214
215static struct quirk_entry quirk_acer_travelmate_2490 = {
216	.mailled = 1,
217};
218
219/* This AMW0 laptop has no bluetooth */
220static struct quirk_entry quirk_medion_md_98300 = {
221	.wireless = 1,
222};
223
224static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
225	.wireless = 2,
226};
227
228/* The Aspire One has a dummy ACPI-WMI interface - disable it */
229static struct dmi_system_id __devinitdata acer_blacklist[] = {
230	{
231		.ident = "Acer Aspire One (SSD)",
232		.matches = {
233			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
234			DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
235		},
236	},
237	{
238		.ident = "Acer Aspire One (HDD)",
239		.matches = {
240			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
241			DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
242		},
243	},
244	{}
245};
246
247static struct dmi_system_id acer_quirks[] = {
248	{
249		.callback = dmi_matched,
250		.ident = "Acer Aspire 1360",
251		.matches = {
252			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
253			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
254		},
255		.driver_data = &quirk_acer_aspire_1520,
256	},
257	{
258		.callback = dmi_matched,
259		.ident = "Acer Aspire 1520",
260		.matches = {
261			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
262			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
263		},
264		.driver_data = &quirk_acer_aspire_1520,
265	},
266	{
267		.callback = dmi_matched,
268		.ident = "Acer Aspire 3100",
269		.matches = {
270			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
271			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
272		},
273		.driver_data = &quirk_acer_travelmate_2490,
274	},
275	{
276		.callback = dmi_matched,
277		.ident = "Acer Aspire 3610",
278		.matches = {
279			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
280			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
281		},
282		.driver_data = &quirk_acer_travelmate_2490,
283	},
284	{
285		.callback = dmi_matched,
286		.ident = "Acer Aspire 5100",
287		.matches = {
288			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
289			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
290		},
291		.driver_data = &quirk_acer_travelmate_2490,
292	},
293	{
294		.callback = dmi_matched,
295		.ident = "Acer Aspire 5610",
296		.matches = {
297			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
298			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
299		},
300		.driver_data = &quirk_acer_travelmate_2490,
301	},
302	{
303		.callback = dmi_matched,
304		.ident = "Acer Aspire 5630",
305		.matches = {
306			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
307			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
308		},
309		.driver_data = &quirk_acer_travelmate_2490,
310	},
311	{
312		.callback = dmi_matched,
313		.ident = "Acer Aspire 5650",
314		.matches = {
315			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
316			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
317		},
318		.driver_data = &quirk_acer_travelmate_2490,
319	},
320	{
321		.callback = dmi_matched,
322		.ident = "Acer Aspire 5680",
323		.matches = {
324			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
325			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
326		},
327		.driver_data = &quirk_acer_travelmate_2490,
328	},
329	{
330		.callback = dmi_matched,
331		.ident = "Acer Aspire 9110",
332		.matches = {
333			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
334			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
335		},
336		.driver_data = &quirk_acer_travelmate_2490,
337	},
338	{
339		.callback = dmi_matched,
340		.ident = "Acer TravelMate 2490",
341		.matches = {
342			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
343			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
344		},
345		.driver_data = &quirk_acer_travelmate_2490,
346	},
347	{
348		.callback = dmi_matched,
349		.ident = "Acer TravelMate 4200",
350		.matches = {
351			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
352			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
353		},
354		.driver_data = &quirk_acer_travelmate_2490,
355	},
356	{
357		.callback = dmi_matched,
358		.ident = "Fujitsu Siemens Amilo Li 1718",
359		.matches = {
360			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
361			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
362		},
363		.driver_data = &quirk_fujitsu_amilo_li_1718,
364	},
365	{
366		.callback = dmi_matched,
367		.ident = "Medion MD 98300",
368		.matches = {
369			DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
370			DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
371		},
372		.driver_data = &quirk_medion_md_98300,
373	},
374	{}
375};
376
377/* Find which quirks are needed for a particular vendor/ model pair */
378static void find_quirks(void)
379{
380	if (!force_series) {
381		dmi_check_system(acer_quirks);
382	} else if (force_series == 2490) {
383		quirks = &quirk_acer_travelmate_2490;
384	}
385
386	if (quirks == NULL)
387		quirks = &quirk_unknown;
388
389	set_quirks();
390}
391
392/*
393 * General interface convenience methods
394 */
395
396static bool has_cap(u32 cap)
397{
398	if ((interface->capability & cap) != 0)
399		return 1;
400
401	return 0;
402}
403
404/*
405 * AMW0 (V1) interface
406 */
407struct wmab_args {
408	u32 eax;
409	u32 ebx;
410	u32 ecx;
411	u32 edx;
412};
413
414struct wmab_ret {
415	u32 eax;
416	u32 ebx;
417	u32 ecx;
418	u32 edx;
419	u32 eex;
420};
421
422static acpi_status wmab_execute(struct wmab_args *regbuf,
423struct acpi_buffer *result)
424{
425	struct acpi_buffer input;
426	acpi_status status;
427	input.length = sizeof(struct wmab_args);
428	input.pointer = (u8 *)regbuf;
429
430	status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
431
432	return status;
433}
434
435static acpi_status AMW0_get_u32(u32 *value, u32 cap,
436struct wmi_interface *iface)
437{
438	int err;
439	u8 result;
440
441	switch (cap) {
442	case ACER_CAP_MAILLED:
443		switch (quirks->mailled) {
444		default:
445			err = ec_read(0xA, &result);
446			if (err)
447				return AE_ERROR;
448			*value = (result >> 7) & 0x1;
449			return AE_OK;
450		}
451		break;
452	case ACER_CAP_WIRELESS:
453		switch (quirks->wireless) {
454		case 1:
455			err = ec_read(0x7B, &result);
456			if (err)
457				return AE_ERROR;
458			*value = result & 0x1;
459			return AE_OK;
460		case 2:
461			err = ec_read(0x71, &result);
462			if (err)
463				return AE_ERROR;
464			*value = result & 0x1;
465			return AE_OK;
466		default:
467			err = ec_read(0xA, &result);
468			if (err)
469				return AE_ERROR;
470			*value = (result >> 2) & 0x1;
471			return AE_OK;
472		}
473		break;
474	case ACER_CAP_BLUETOOTH:
475		switch (quirks->bluetooth) {
476		default:
477			err = ec_read(0xA, &result);
478			if (err)
479				return AE_ERROR;
480			*value = (result >> 4) & 0x1;
481			return AE_OK;
482		}
483		break;
484	case ACER_CAP_BRIGHTNESS:
485		switch (quirks->brightness) {
486		default:
487			err = ec_read(0x83, &result);
488			if (err)
489				return AE_ERROR;
490			*value = result;
491			return AE_OK;
492		}
493		break;
494	default:
495		return AE_ERROR;
496	}
497	return AE_OK;
498}
499
500static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
501{
502	struct wmab_args args;
503
504	args.eax = ACER_AMW0_WRITE;
505	args.ebx = value ? (1<<8) : 0;
506	args.ecx = args.edx = 0;
507
508	switch (cap) {
509	case ACER_CAP_MAILLED:
510		if (value > 1)
511			return AE_BAD_PARAMETER;
512		args.ebx |= ACER_AMW0_MAILLED_MASK;
513		break;
514	case ACER_CAP_WIRELESS:
515		if (value > 1)
516			return AE_BAD_PARAMETER;
517		args.ebx |= ACER_AMW0_WIRELESS_MASK;
518		break;
519	case ACER_CAP_BLUETOOTH:
520		if (value > 1)
521			return AE_BAD_PARAMETER;
522		args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
523		break;
524	case ACER_CAP_BRIGHTNESS:
525		if (value > max_brightness)
526			return AE_BAD_PARAMETER;
527		switch (quirks->brightness) {
528		default:
529			return ec_write(0x83, value);
530			break;
531		}
532	default:
533		return AE_ERROR;
534	}
535
536	/* Actually do the set */
537	return wmab_execute(&args, NULL);
538}
539
540static acpi_status AMW0_find_mailled(void)
541{
542	struct wmab_args args;
543	struct wmab_ret ret;
544	acpi_status status = AE_OK;
545	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
546	union acpi_object *obj;
547
548	args.eax = 0x86;
549	args.ebx = args.ecx = args.edx = 0;
550
551	status = wmab_execute(&args, &out);
552	if (ACPI_FAILURE(status))
553		return status;
554
555	obj = (union acpi_object *) out.pointer;
556	if (obj && obj->type == ACPI_TYPE_BUFFER &&
557	obj->buffer.length == sizeof(struct wmab_ret)) {
558		ret = *((struct wmab_ret *) obj->buffer.pointer);
559	} else {
560		return AE_ERROR;
561	}
562
563	if (ret.eex & 0x1)
564		interface->capability |= ACER_CAP_MAILLED;
565
566	kfree(out.pointer);
567
568	return AE_OK;
569}
570
571static acpi_status AMW0_set_capabilities(void)
572{
573	struct wmab_args args;
574	struct wmab_ret ret;
575	acpi_status status = AE_OK;
576	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
577	union acpi_object *obj;
578
579	/*
580	 * On laptops with this strange GUID (non Acer), normal probing doesn't
581	 * work.
582	 */
583	if (wmi_has_guid(AMW0_GUID2)) {
584		interface->capability |= ACER_CAP_WIRELESS;
585		return AE_OK;
586	}
587
588	args.eax = ACER_AMW0_WRITE;
589	args.ecx = args.edx = 0;
590
591	args.ebx = 0xa2 << 8;
592	args.ebx |= ACER_AMW0_WIRELESS_MASK;
593
594	status = wmab_execute(&args, &out);
595	if (ACPI_FAILURE(status))
596		return status;
597
598	obj = (union acpi_object *) out.pointer;
599	if (obj && obj->type == ACPI_TYPE_BUFFER &&
600	obj->buffer.length == sizeof(struct wmab_ret)) {
601		ret = *((struct wmab_ret *) obj->buffer.pointer);
602	} else {
603		return AE_ERROR;
604	}
605
606	if (ret.eax & 0x1)
607		interface->capability |= ACER_CAP_WIRELESS;
608
609	args.ebx = 2 << 8;
610	args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
611
612	status = wmab_execute(&args, &out);
613	if (ACPI_FAILURE(status))
614		return status;
615
616	obj = (union acpi_object *) out.pointer;
617	if (obj && obj->type == ACPI_TYPE_BUFFER
618	&& obj->buffer.length == sizeof(struct wmab_ret)) {
619		ret = *((struct wmab_ret *) obj->buffer.pointer);
620	} else {
621		return AE_ERROR;
622	}
623
624	if (ret.eax & 0x1)
625		interface->capability |= ACER_CAP_BLUETOOTH;
626
627	kfree(out.pointer);
628
629	/*
630	 * This appears to be safe to enable, since all Wistron based laptops
631	 * appear to use the same EC register for brightness, even if they
632	 * differ for wireless, etc
633	 */
634	if (quirks->brightness >= 0)
635		interface->capability |= ACER_CAP_BRIGHTNESS;
636
637	return AE_OK;
638}
639
640static struct wmi_interface AMW0_interface = {
641	.type = ACER_AMW0,
642};
643
644static struct wmi_interface AMW0_V2_interface = {
645	.type = ACER_AMW0_V2,
646};
647
648/*
649 * New interface (The WMID interface)
650 */
651static acpi_status
652WMI_execute_u32(u32 method_id, u32 in, u32 *out)
653{
654	struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
655	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
656	union acpi_object *obj;
657	u32 tmp;
658	acpi_status status;
659
660	status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
661
662	if (ACPI_FAILURE(status))
663		return status;
664
665	obj = (union acpi_object *) result.pointer;
666	if (obj && obj->type == ACPI_TYPE_BUFFER &&
667		obj->buffer.length == sizeof(u32)) {
668		tmp = *((u32 *) obj->buffer.pointer);
669	} else {
670		tmp = 0;
671	}
672
673	if (out)
674		*out = tmp;
675
676	kfree(result.pointer);
677
678	return status;
679}
680
681static acpi_status WMID_get_u32(u32 *value, u32 cap,
682struct wmi_interface *iface)
683{
684	acpi_status status;
685	u8 tmp;
686	u32 result, method_id = 0;
687
688	switch (cap) {
689	case ACER_CAP_WIRELESS:
690		method_id = ACER_WMID_GET_WIRELESS_METHODID;
691		break;
692	case ACER_CAP_BLUETOOTH:
693		method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
694		break;
695	case ACER_CAP_BRIGHTNESS:
696		method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
697		break;
698	case ACER_CAP_THREEG:
699		method_id = ACER_WMID_GET_THREEG_METHODID;
700		break;
701	case ACER_CAP_MAILLED:
702		if (quirks->mailled == 1) {
703			ec_read(0x9f, &tmp);
704			*value = tmp & 0x1;
705			return 0;
706		}
707	default:
708		return AE_ERROR;
709	}
710	status = WMI_execute_u32(method_id, 0, &result);
711
712	if (ACPI_SUCCESS(status))
713		*value = (u8)result;
714
715	return status;
716}
717
718static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
719{
720	u32 method_id = 0;
721	char param;
722
723	switch (cap) {
724	case ACER_CAP_BRIGHTNESS:
725		if (value > max_brightness)
726			return AE_BAD_PARAMETER;
727		method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
728		break;
729	case ACER_CAP_WIRELESS:
730		if (value > 1)
731			return AE_BAD_PARAMETER;
732		method_id = ACER_WMID_SET_WIRELESS_METHODID;
733		break;
734	case ACER_CAP_BLUETOOTH:
735		if (value > 1)
736			return AE_BAD_PARAMETER;
737		method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
738		break;
739	case ACER_CAP_THREEG:
740		if (value > 1)
741			return AE_BAD_PARAMETER;
742		method_id = ACER_WMID_SET_THREEG_METHODID;
743		break;
744	case ACER_CAP_MAILLED:
745		if (value > 1)
746			return AE_BAD_PARAMETER;
747		if (quirks->mailled == 1) {
748			param = value ? 0x92 : 0x93;
749			i8042_command(&param, 0x1059);
750			return 0;
751		}
752		break;
753	default:
754		return AE_ERROR;
755	}
756	return WMI_execute_u32(method_id, (u32)value, NULL);
757}
758
759static acpi_status WMID_set_capabilities(void)
760{
761	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
762	union acpi_object *obj;
763	acpi_status status;
764	u32 devices;
765
766	status = wmi_query_block(WMID_GUID2, 1, &out);
767	if (ACPI_FAILURE(status))
768		return status;
769
770	obj = (union acpi_object *) out.pointer;
771	if (obj && obj->type == ACPI_TYPE_BUFFER &&
772		obj->buffer.length == sizeof(u32)) {
773		devices = *((u32 *) obj->buffer.pointer);
774	} else {
775		return AE_ERROR;
776	}
777
778	/* Not sure on the meaning of the relevant bits yet to detect these */
779	interface->capability |= ACER_CAP_WIRELESS;
780	interface->capability |= ACER_CAP_THREEG;
781
782	/* WMID always provides brightness methods */
783	interface->capability |= ACER_CAP_BRIGHTNESS;
784
785	if (devices & 0x10)
786		interface->capability |= ACER_CAP_BLUETOOTH;
787
788	if (!(devices & 0x20))
789		max_brightness = 0x9;
790
791	return status;
792}
793
794static struct wmi_interface wmid_interface = {
795	.type = ACER_WMID,
796};
797
798/*
799 * Generic Device (interface-independent)
800 */
801
802static acpi_status get_u32(u32 *value, u32 cap)
803{
804	acpi_status status = AE_ERROR;
805
806	switch (interface->type) {
807	case ACER_AMW0:
808		status = AMW0_get_u32(value, cap, interface);
809		break;
810	case ACER_AMW0_V2:
811		if (cap == ACER_CAP_MAILLED) {
812			status = AMW0_get_u32(value, cap, interface);
813			break;
814		}
815	case ACER_WMID:
816		status = WMID_get_u32(value, cap, interface);
817		break;
818	}
819
820	return status;
821}
822
823static acpi_status set_u32(u32 value, u32 cap)
824{
825	acpi_status status;
826
827	if (interface->capability & cap) {
828		switch (interface->type) {
829		case ACER_AMW0:
830			return AMW0_set_u32(value, cap, interface);
831		case ACER_AMW0_V2:
832			if (cap == ACER_CAP_MAILLED)
833				return AMW0_set_u32(value, cap, interface);
834
835			/*
836			 * On some models, some WMID methods don't toggle
837			 * properly. For those cases, we want to run the AMW0
838			 * method afterwards to be certain we've really toggled
839			 * the device state.
840			 */
841			if (cap == ACER_CAP_WIRELESS ||
842				cap == ACER_CAP_BLUETOOTH) {
843				status = WMID_set_u32(value, cap, interface);
844				if (ACPI_FAILURE(status))
845					return status;
846
847				return AMW0_set_u32(value, cap, interface);
848			}
849		case ACER_WMID:
850			return WMID_set_u32(value, cap, interface);
851		default:
852			return AE_BAD_PARAMETER;
853		}
854	}
855	return AE_BAD_PARAMETER;
856}
857
858static void __init acer_commandline_init(void)
859{
860	/*
861	 * These will all fail silently if the value given is invalid, or the
862	 * capability isn't available on the given interface
863	 */
864	set_u32(mailled, ACER_CAP_MAILLED);
865	set_u32(threeg, ACER_CAP_THREEG);
866	set_u32(brightness, ACER_CAP_BRIGHTNESS);
867}
868
869/*
870 * LED device (Mail LED only, no other LEDs known yet)
871 */
872static void mail_led_set(struct led_classdev *led_cdev,
873enum led_brightness value)
874{
875	set_u32(value, ACER_CAP_MAILLED);
876}
877
878static struct led_classdev mail_led = {
879	.name = "acer-wmi::mail",
880	.brightness_set = mail_led_set,
881};
882
883static int __devinit acer_led_init(struct device *dev)
884{
885	return led_classdev_register(dev, &mail_led);
886}
887
888static void acer_led_exit(void)
889{
890	led_classdev_unregister(&mail_led);
891}
892
893/*
894 * Backlight device
895 */
896static struct backlight_device *acer_backlight_device;
897
898static int read_brightness(struct backlight_device *bd)
899{
900	u32 value;
901	get_u32(&value, ACER_CAP_BRIGHTNESS);
902	return value;
903}
904
905static int update_bl_status(struct backlight_device *bd)
906{
907	int intensity = bd->props.brightness;
908
909	if (bd->props.power != FB_BLANK_UNBLANK)
910		intensity = 0;
911	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
912		intensity = 0;
913
914	set_u32(intensity, ACER_CAP_BRIGHTNESS);
915
916	return 0;
917}
918
919static struct backlight_ops acer_bl_ops = {
920	.get_brightness = read_brightness,
921	.update_status = update_bl_status,
922};
923
924static int __devinit acer_backlight_init(struct device *dev)
925{
926	struct backlight_device *bd;
927
928	bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
929	if (IS_ERR(bd)) {
930		printk(ACER_ERR "Could not register Acer backlight device\n");
931		acer_backlight_device = NULL;
932		return PTR_ERR(bd);
933	}
934
935	acer_backlight_device = bd;
936
937	bd->props.power = FB_BLANK_UNBLANK;
938	bd->props.brightness = max_brightness;
939	bd->props.max_brightness = max_brightness;
940	backlight_update_status(bd);
941	return 0;
942}
943
944static void acer_backlight_exit(void)
945{
946	backlight_device_unregister(acer_backlight_device);
947}
948
949/*
950 * Rfkill devices
951 */
952static void acer_rfkill_update(struct work_struct *ignored);
953static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
954static void acer_rfkill_update(struct work_struct *ignored)
955{
956	u32 state;
957	acpi_status status;
958
959	status = get_u32(&state, ACER_CAP_WIRELESS);
960	if (ACPI_SUCCESS(status))
961		rfkill_set_sw_state(wireless_rfkill, !!state);
962
963	if (has_cap(ACER_CAP_BLUETOOTH)) {
964		status = get_u32(&state, ACER_CAP_BLUETOOTH);
965		if (ACPI_SUCCESS(status))
966			rfkill_set_sw_state(bluetooth_rfkill, !!state);
967	}
968
969	schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
970}
971
972static int acer_rfkill_set(void *data, bool blocked)
973{
974	acpi_status status;
975	u32 cap = (unsigned long)data;
976	status = set_u32(!!blocked, cap);
977	if (ACPI_FAILURE(status))
978		return -ENODEV;
979	return 0;
980}
981
982static const struct rfkill_ops acer_rfkill_ops = {
983	.set_block = acer_rfkill_set,
984};
985
986static struct rfkill *acer_rfkill_register(struct device *dev,
987					   enum rfkill_type type,
988					   char *name, u32 cap)
989{
990	int err;
991	u32 state;
992	struct rfkill *rfkill_dev;
993
994	rfkill_dev = rfkill_alloc(name, dev, type,
995				  &acer_rfkill_ops,
996				  (void *)(unsigned long)cap);
997	if (!rfkill_dev)
998		return ERR_PTR(-ENOMEM);
999	get_u32(&state, cap);
1000	rfkill_set_sw_state(rfkill_dev, !state);
1001
1002	err = rfkill_register(rfkill_dev);
1003	if (err) {
1004		rfkill_destroy(rfkill_dev);
1005		return ERR_PTR(err);
1006	}
1007	return rfkill_dev;
1008}
1009
1010static int acer_rfkill_init(struct device *dev)
1011{
1012	wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1013		"acer-wireless", ACER_CAP_WIRELESS);
1014	if (IS_ERR(wireless_rfkill))
1015		return PTR_ERR(wireless_rfkill);
1016
1017	if (has_cap(ACER_CAP_BLUETOOTH)) {
1018		bluetooth_rfkill = acer_rfkill_register(dev,
1019			RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1020			ACER_CAP_BLUETOOTH);
1021		if (IS_ERR(bluetooth_rfkill)) {
1022			rfkill_unregister(wireless_rfkill);
1023			rfkill_destroy(wireless_rfkill);
1024			return PTR_ERR(bluetooth_rfkill);
1025		}
1026	}
1027
1028	schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1029
1030	return 0;
1031}
1032
1033static void acer_rfkill_exit(void)
1034{
1035	cancel_delayed_work_sync(&acer_rfkill_work);
1036
1037	rfkill_unregister(wireless_rfkill);
1038	rfkill_destroy(wireless_rfkill);
1039
1040	if (has_cap(ACER_CAP_BLUETOOTH)) {
1041		rfkill_unregister(bluetooth_rfkill);
1042		rfkill_destroy(bluetooth_rfkill);
1043	}
1044	return;
1045}
1046
1047/*
1048 * sysfs interface
1049 */
1050static ssize_t show_bool_threeg(struct device *dev,
1051	struct device_attribute *attr, char *buf)
1052{
1053	u32 result; \
1054	acpi_status status = get_u32(&result, ACER_CAP_THREEG);
1055	if (ACPI_SUCCESS(status))
1056		return sprintf(buf, "%u\n", result);
1057	return sprintf(buf, "Read error\n");
1058}
1059
1060static ssize_t set_bool_threeg(struct device *dev,
1061	struct device_attribute *attr, const char *buf, size_t count)
1062{
1063	u32 tmp = simple_strtoul(buf, NULL, 10);
1064	acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1065		if (ACPI_FAILURE(status))
1066			return -EINVAL;
1067	return count;
1068}
1069static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1070	set_bool_threeg);
1071
1072static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1073	char *buf)
1074{
1075	switch (interface->type) {
1076	case ACER_AMW0:
1077		return sprintf(buf, "AMW0\n");
1078	case ACER_AMW0_V2:
1079		return sprintf(buf, "AMW0 v2\n");
1080	case ACER_WMID:
1081		return sprintf(buf, "WMID\n");
1082	default:
1083		return sprintf(buf, "Error!\n");
1084	}
1085}
1086
1087static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
1088	show_interface, NULL);
1089
1090/*
1091 * debugfs functions
1092 */
1093static u32 get_wmid_devices(void)
1094{
1095	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1096	union acpi_object *obj;
1097	acpi_status status;
1098
1099	status = wmi_query_block(WMID_GUID2, 1, &out);
1100	if (ACPI_FAILURE(status))
1101		return 0;
1102
1103	obj = (union acpi_object *) out.pointer;
1104	if (obj && obj->type == ACPI_TYPE_BUFFER &&
1105		obj->buffer.length == sizeof(u32)) {
1106		return *((u32 *) obj->buffer.pointer);
1107	} else {
1108		return 0;
1109	}
1110}
1111
1112/*
1113 * Platform device
1114 */
1115static int __devinit acer_platform_probe(struct platform_device *device)
1116{
1117	int err;
1118
1119	if (has_cap(ACER_CAP_MAILLED)) {
1120		err = acer_led_init(&device->dev);
1121		if (err)
1122			goto error_mailled;
1123	}
1124
1125	if (has_cap(ACER_CAP_BRIGHTNESS)) {
1126		err = acer_backlight_init(&device->dev);
1127		if (err)
1128			goto error_brightness;
1129	}
1130
1131	err = acer_rfkill_init(&device->dev);
1132	if (err)
1133		goto error_rfkill;
1134
1135	return err;
1136
1137error_rfkill:
1138	if (has_cap(ACER_CAP_BRIGHTNESS))
1139		acer_backlight_exit();
1140error_brightness:
1141	if (has_cap(ACER_CAP_MAILLED))
1142		acer_led_exit();
1143error_mailled:
1144	return err;
1145}
1146
1147static int acer_platform_remove(struct platform_device *device)
1148{
1149	if (has_cap(ACER_CAP_MAILLED))
1150		acer_led_exit();
1151	if (has_cap(ACER_CAP_BRIGHTNESS))
1152		acer_backlight_exit();
1153
1154	acer_rfkill_exit();
1155	return 0;
1156}
1157
1158static int acer_platform_suspend(struct platform_device *dev,
1159pm_message_t state)
1160{
1161	u32 value;
1162	struct acer_data *data = &interface->data;
1163
1164	if (!data)
1165		return -ENOMEM;
1166
1167	if (has_cap(ACER_CAP_MAILLED)) {
1168		get_u32(&value, ACER_CAP_MAILLED);
1169		data->mailled = value;
1170	}
1171
1172	if (has_cap(ACER_CAP_BRIGHTNESS)) {
1173		get_u32(&value, ACER_CAP_BRIGHTNESS);
1174		data->brightness = value;
1175	}
1176
1177	return 0;
1178}
1179
1180static int acer_platform_resume(struct platform_device *device)
1181{
1182	struct acer_data *data = &interface->data;
1183
1184	if (!data)
1185		return -ENOMEM;
1186
1187	if (has_cap(ACER_CAP_MAILLED))
1188		set_u32(data->mailled, ACER_CAP_MAILLED);
1189
1190	if (has_cap(ACER_CAP_BRIGHTNESS))
1191		set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1192
1193	return 0;
1194}
1195
1196static struct platform_driver acer_platform_driver = {
1197	.driver = {
1198		.name = "acer-wmi",
1199		.owner = THIS_MODULE,
1200	},
1201	.probe = acer_platform_probe,
1202	.remove = acer_platform_remove,
1203	.suspend = acer_platform_suspend,
1204	.resume = acer_platform_resume,
1205};
1206
1207static struct platform_device *acer_platform_device;
1208
1209static int remove_sysfs(struct platform_device *device)
1210{
1211	if (has_cap(ACER_CAP_THREEG))
1212		device_remove_file(&device->dev, &dev_attr_threeg);
1213
1214	device_remove_file(&device->dev, &dev_attr_interface);
1215
1216	return 0;
1217}
1218
1219static int create_sysfs(void)
1220{
1221	int retval = -ENOMEM;
1222
1223	if (has_cap(ACER_CAP_THREEG)) {
1224		retval = device_create_file(&acer_platform_device->dev,
1225			&dev_attr_threeg);
1226		if (retval)
1227			goto error_sysfs;
1228	}
1229
1230	retval = device_create_file(&acer_platform_device->dev,
1231		&dev_attr_interface);
1232	if (retval)
1233		goto error_sysfs;
1234
1235	return 0;
1236
1237error_sysfs:
1238		remove_sysfs(acer_platform_device);
1239	return retval;
1240}
1241
1242static void remove_debugfs(void)
1243{
1244	debugfs_remove(interface->debug.devices);
1245	debugfs_remove(interface->debug.root);
1246}
1247
1248static int create_debugfs(void)
1249{
1250	interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1251	if (!interface->debug.root) {
1252		printk(ACER_ERR "Failed to create debugfs directory");
1253		return -ENOMEM;
1254	}
1255
1256	interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1257					interface->debug.root,
1258					&interface->debug.wmid_devices);
1259	if (!interface->debug.devices)
1260		goto error_debugfs;
1261
1262	return 0;
1263
1264error_debugfs:
1265	remove_debugfs();
1266	return -ENOMEM;
1267}
1268
1269static int __init acer_wmi_init(void)
1270{
1271	int err;
1272
1273	printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1274
1275	if (dmi_check_system(acer_blacklist)) {
1276		printk(ACER_INFO "Blacklisted hardware detected - "
1277				"not loading\n");
1278		return -ENODEV;
1279	}
1280
1281	find_quirks();
1282
1283	/*
1284	 * Detect which ACPI-WMI interface we're using.
1285	 */
1286	if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1287		interface = &AMW0_V2_interface;
1288
1289	if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1290		interface = &wmid_interface;
1291
1292	if (wmi_has_guid(WMID_GUID2) && interface) {
1293		if (ACPI_FAILURE(WMID_set_capabilities())) {
1294			printk(ACER_ERR "Unable to detect available WMID "
1295					"devices\n");
1296			return -ENODEV;
1297		}
1298	} else if (!wmi_has_guid(WMID_GUID2) && interface) {
1299		printk(ACER_ERR "No WMID device detection method found\n");
1300		return -ENODEV;
1301	}
1302
1303	if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1304		interface = &AMW0_interface;
1305
1306		if (ACPI_FAILURE(AMW0_set_capabilities())) {
1307			printk(ACER_ERR "Unable to detect available AMW0 "
1308					"devices\n");
1309			return -ENODEV;
1310		}
1311	}
1312
1313	if (wmi_has_guid(AMW0_GUID1))
1314		AMW0_find_mailled();
1315
1316	if (!interface) {
1317		printk(ACER_ERR "No or unsupported WMI interface, unable to "
1318				"load\n");
1319		return -ENODEV;
1320	}
1321
1322	set_quirks();
1323
1324	if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1325		interface->capability &= ~ACER_CAP_BRIGHTNESS;
1326		printk(ACER_INFO "Brightness must be controlled by "
1327		       "generic video driver\n");
1328	}
1329
1330	if (platform_driver_register(&acer_platform_driver)) {
1331		printk(ACER_ERR "Unable to register platform driver.\n");
1332		goto error_platform_register;
1333	}
1334	acer_platform_device = platform_device_alloc("acer-wmi", -1);
1335	platform_device_add(acer_platform_device);
1336
1337	err = create_sysfs();
1338	if (err)
1339		return err;
1340
1341	if (wmi_has_guid(WMID_GUID2)) {
1342		interface->debug.wmid_devices = get_wmid_devices();
1343		err = create_debugfs();
1344		if (err)
1345			return err;
1346	}
1347
1348	/* Override any initial settings with values from the commandline */
1349	acer_commandline_init();
1350
1351	return 0;
1352
1353error_platform_register:
1354	return -ENODEV;
1355}
1356
1357static void __exit acer_wmi_exit(void)
1358{
1359	remove_sysfs(acer_platform_device);
1360	remove_debugfs();
1361	platform_device_del(acer_platform_device);
1362	platform_driver_unregister(&acer_platform_driver);
1363
1364	printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1365	return;
1366}
1367
1368module_init(acer_wmi_init);
1369module_exit(acer_wmi_exit);
1370