acer-wmi.c revision 6f6ef82cc9de24153ba7d5cedab5970e276aefa1 
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/*
100 * Interface capability flags
101 */
102#define ACER_CAP_MAILLED		(1<<0)
103#define ACER_CAP_WIRELESS		(1<<1)
104#define ACER_CAP_BLUETOOTH		(1<<2)
105#define ACER_CAP_BRIGHTNESS		(1<<3)
106#define ACER_CAP_THREEG			(1<<4)
107#define ACER_CAP_ANY			(0xFFFFFFFF)
108
109/*
110 * Interface type flags
111 */
112enum interface_flags {
113	ACER_AMW0,
114	ACER_AMW0_V2,
115	ACER_WMID,
116};
117
118#define ACER_DEFAULT_WIRELESS  0
119#define ACER_DEFAULT_BLUETOOTH 0
120#define ACER_DEFAULT_MAILLED   0
121#define ACER_DEFAULT_THREEG    0
122
123static int max_brightness = 0xF;
124
125static int mailled = -1;
126static int brightness = -1;
127static int threeg = -1;
128static int force_series;
129
130module_param(mailled, int, 0444);
131module_param(brightness, int, 0444);
132module_param(threeg, int, 0444);
133module_param(force_series, int, 0444);
134MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
135MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
136MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
137MODULE_PARM_DESC(force_series, "Force a different laptop series");
138
139struct acer_data {
140	int mailled;
141	int threeg;
142	int brightness;
143};
144
145struct acer_debug {
146	struct dentry *root;
147	struct dentry *devices;
148	u32 wmid_devices;
149};
150
151static struct rfkill *wireless_rfkill;
152static struct rfkill *bluetooth_rfkill;
153
154/* Each low-level interface must define at least some of the following */
155struct wmi_interface {
156	/* The WMI device type */
157	u32 type;
158
159	/* The capabilities this interface provides */
160	u32 capability;
161
162	/* Private data for the current interface */
163	struct acer_data data;
164
165	/* debugfs entries associated with this interface */
166	struct acer_debug debug;
167};
168
169/* The static interface pointer, points to the currently detected interface */
170static struct wmi_interface *interface;
171
172/*
173 * Embedded Controller quirks
174 * Some laptops require us to directly access the EC to either enable or query
175 * features that are not available through WMI.
176 */
177
178struct quirk_entry {
179	u8 wireless;
180	u8 mailled;
181	s8 brightness;
182	u8 bluetooth;
183};
184
185static struct quirk_entry *quirks;
186
187static void set_quirks(void)
188{
189	if (!interface)
190		return;
191
192	if (quirks->mailled)
193		interface->capability |= ACER_CAP_MAILLED;
194
195	if (quirks->brightness)
196		interface->capability |= ACER_CAP_BRIGHTNESS;
197}
198
199static int dmi_matched(const struct dmi_system_id *dmi)
200{
201	quirks = dmi->driver_data;
202	return 0;
203}
204
205static struct quirk_entry quirk_unknown = {
206};
207
208static struct quirk_entry quirk_acer_aspire_1520 = {
209	.brightness = -1,
210};
211
212static struct quirk_entry quirk_acer_travelmate_2490 = {
213	.mailled = 1,
214};
215
216/* This AMW0 laptop has no bluetooth */
217static struct quirk_entry quirk_medion_md_98300 = {
218	.wireless = 1,
219};
220
221static struct quirk_entry quirk_fujitsu_amilo_li_1718 = {
222	.wireless = 2,
223};
224
225/* The Aspire One has a dummy ACPI-WMI interface - disable it */
226static struct dmi_system_id __devinitdata acer_blacklist[] = {
227	{
228		.ident = "Acer Aspire One (SSD)",
229		.matches = {
230			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
231			DMI_MATCH(DMI_PRODUCT_NAME, "AOA110"),
232		},
233	},
234	{
235		.ident = "Acer Aspire One (HDD)",
236		.matches = {
237			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
238			DMI_MATCH(DMI_PRODUCT_NAME, "AOA150"),
239		},
240	},
241	{}
242};
243
244static struct dmi_system_id acer_quirks[] = {
245	{
246		.callback = dmi_matched,
247		.ident = "Acer Aspire 1360",
248		.matches = {
249			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
250			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1360"),
251		},
252		.driver_data = &quirk_acer_aspire_1520,
253	},
254	{
255		.callback = dmi_matched,
256		.ident = "Acer Aspire 1520",
257		.matches = {
258			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
259			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1520"),
260		},
261		.driver_data = &quirk_acer_aspire_1520,
262	},
263	{
264		.callback = dmi_matched,
265		.ident = "Acer Aspire 3100",
266		.matches = {
267			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
268			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
269		},
270		.driver_data = &quirk_acer_travelmate_2490,
271	},
272	{
273		.callback = dmi_matched,
274		.ident = "Acer Aspire 3610",
275		.matches = {
276			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
277			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3610"),
278		},
279		.driver_data = &quirk_acer_travelmate_2490,
280	},
281	{
282		.callback = dmi_matched,
283		.ident = "Acer Aspire 5100",
284		.matches = {
285			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
286			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
287		},
288		.driver_data = &quirk_acer_travelmate_2490,
289	},
290	{
291		.callback = dmi_matched,
292		.ident = "Acer Aspire 5610",
293		.matches = {
294			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
295			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5610"),
296		},
297		.driver_data = &quirk_acer_travelmate_2490,
298	},
299	{
300		.callback = dmi_matched,
301		.ident = "Acer Aspire 5630",
302		.matches = {
303			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
304			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
305		},
306		.driver_data = &quirk_acer_travelmate_2490,
307	},
308	{
309		.callback = dmi_matched,
310		.ident = "Acer Aspire 5650",
311		.matches = {
312			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
313			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
314		},
315		.driver_data = &quirk_acer_travelmate_2490,
316	},
317	{
318		.callback = dmi_matched,
319		.ident = "Acer Aspire 5680",
320		.matches = {
321			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
322			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
323		},
324		.driver_data = &quirk_acer_travelmate_2490,
325	},
326	{
327		.callback = dmi_matched,
328		.ident = "Acer Aspire 9110",
329		.matches = {
330			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
331			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
332		},
333		.driver_data = &quirk_acer_travelmate_2490,
334	},
335	{
336		.callback = dmi_matched,
337		.ident = "Acer TravelMate 2490",
338		.matches = {
339			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
340			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
341		},
342		.driver_data = &quirk_acer_travelmate_2490,
343	},
344	{
345		.callback = dmi_matched,
346		.ident = "Acer TravelMate 4200",
347		.matches = {
348			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
349			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
350		},
351		.driver_data = &quirk_acer_travelmate_2490,
352	},
353	{
354		.callback = dmi_matched,
355		.ident = "Fujitsu Siemens Amilo Li 1718",
356		.matches = {
357			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
358			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Li 1718"),
359		},
360		.driver_data = &quirk_fujitsu_amilo_li_1718,
361	},
362	{
363		.callback = dmi_matched,
364		.ident = "Medion MD 98300",
365		.matches = {
366			DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
367			DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
368		},
369		.driver_data = &quirk_medion_md_98300,
370	},
371	{}
372};
373
374/* Find which quirks are needed for a particular vendor/ model pair */
375static void find_quirks(void)
376{
377	if (!force_series) {
378		dmi_check_system(acer_quirks);
379	} else if (force_series == 2490) {
380		quirks = &quirk_acer_travelmate_2490;
381	}
382
383	if (quirks == NULL)
384		quirks = &quirk_unknown;
385
386	set_quirks();
387}
388
389/*
390 * General interface convenience methods
391 */
392
393static bool has_cap(u32 cap)
394{
395	if ((interface->capability & cap) != 0)
396		return 1;
397
398	return 0;
399}
400
401/*
402 * AMW0 (V1) interface
403 */
404struct wmab_args {
405	u32 eax;
406	u32 ebx;
407	u32 ecx;
408	u32 edx;
409};
410
411struct wmab_ret {
412	u32 eax;
413	u32 ebx;
414	u32 ecx;
415	u32 edx;
416	u32 eex;
417};
418
419static acpi_status wmab_execute(struct wmab_args *regbuf,
420struct acpi_buffer *result)
421{
422	struct acpi_buffer input;
423	acpi_status status;
424	input.length = sizeof(struct wmab_args);
425	input.pointer = (u8 *)regbuf;
426
427	status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
428
429	return status;
430}
431
432static acpi_status AMW0_get_u32(u32 *value, u32 cap,
433struct wmi_interface *iface)
434{
435	int err;
436	u8 result;
437
438	switch (cap) {
439	case ACER_CAP_MAILLED:
440		switch (quirks->mailled) {
441		default:
442			err = ec_read(0xA, &result);
443			if (err)
444				return AE_ERROR;
445			*value = (result >> 7) & 0x1;
446			return AE_OK;
447		}
448		break;
449	case ACER_CAP_WIRELESS:
450		switch (quirks->wireless) {
451		case 1:
452			err = ec_read(0x7B, &result);
453			if (err)
454				return AE_ERROR;
455			*value = result & 0x1;
456			return AE_OK;
457		case 2:
458			err = ec_read(0x71, &result);
459			if (err)
460				return AE_ERROR;
461			*value = result & 0x1;
462			return AE_OK;
463		default:
464			err = ec_read(0xA, &result);
465			if (err)
466				return AE_ERROR;
467			*value = (result >> 2) & 0x1;
468			return AE_OK;
469		}
470		break;
471	case ACER_CAP_BLUETOOTH:
472		switch (quirks->bluetooth) {
473		default:
474			err = ec_read(0xA, &result);
475			if (err)
476				return AE_ERROR;
477			*value = (result >> 4) & 0x1;
478			return AE_OK;
479		}
480		break;
481	case ACER_CAP_BRIGHTNESS:
482		switch (quirks->brightness) {
483		default:
484			err = ec_read(0x83, &result);
485			if (err)
486				return AE_ERROR;
487			*value = result;
488			return AE_OK;
489		}
490		break;
491	default:
492		return AE_ERROR;
493	}
494	return AE_OK;
495}
496
497static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
498{
499	struct wmab_args args;
500
501	args.eax = ACER_AMW0_WRITE;
502	args.ebx = value ? (1<<8) : 0;
503	args.ecx = args.edx = 0;
504
505	switch (cap) {
506	case ACER_CAP_MAILLED:
507		if (value > 1)
508			return AE_BAD_PARAMETER;
509		args.ebx |= ACER_AMW0_MAILLED_MASK;
510		break;
511	case ACER_CAP_WIRELESS:
512		if (value > 1)
513			return AE_BAD_PARAMETER;
514		args.ebx |= ACER_AMW0_WIRELESS_MASK;
515		break;
516	case ACER_CAP_BLUETOOTH:
517		if (value > 1)
518			return AE_BAD_PARAMETER;
519		args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
520		break;
521	case ACER_CAP_BRIGHTNESS:
522		if (value > max_brightness)
523			return AE_BAD_PARAMETER;
524		switch (quirks->brightness) {
525		default:
526			return ec_write(0x83, value);
527			break;
528		}
529	default:
530		return AE_ERROR;
531	}
532
533	/* Actually do the set */
534	return wmab_execute(&args, NULL);
535}
536
537static acpi_status AMW0_find_mailled(void)
538{
539	struct wmab_args args;
540	struct wmab_ret ret;
541	acpi_status status = AE_OK;
542	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
543	union acpi_object *obj;
544
545	args.eax = 0x86;
546	args.ebx = args.ecx = args.edx = 0;
547
548	status = wmab_execute(&args, &out);
549	if (ACPI_FAILURE(status))
550		return status;
551
552	obj = (union acpi_object *) out.pointer;
553	if (obj && obj->type == ACPI_TYPE_BUFFER &&
554	obj->buffer.length == sizeof(struct wmab_ret)) {
555		ret = *((struct wmab_ret *) obj->buffer.pointer);
556	} else {
557		return AE_ERROR;
558	}
559
560	if (ret.eex & 0x1)
561		interface->capability |= ACER_CAP_MAILLED;
562
563	kfree(out.pointer);
564
565	return AE_OK;
566}
567
568static acpi_status AMW0_set_capabilities(void)
569{
570	struct wmab_args args;
571	struct wmab_ret ret;
572	acpi_status status = AE_OK;
573	struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
574	union acpi_object *obj;
575
576	/*
577	 * On laptops with this strange GUID (non Acer), normal probing doesn't
578	 * work.
579	 */
580	if (wmi_has_guid(AMW0_GUID2)) {
581		interface->capability |= ACER_CAP_WIRELESS;
582		return AE_OK;
583	}
584
585	args.eax = ACER_AMW0_WRITE;
586	args.ecx = args.edx = 0;
587
588	args.ebx = 0xa2 << 8;
589	args.ebx |= ACER_AMW0_WIRELESS_MASK;
590
591	status = wmab_execute(&args, &out);
592	if (ACPI_FAILURE(status))
593		return status;
594
595	obj = (union acpi_object *) out.pointer;
596	if (obj && obj->type == ACPI_TYPE_BUFFER &&
597	obj->buffer.length == sizeof(struct wmab_ret)) {
598		ret = *((struct wmab_ret *) obj->buffer.pointer);
599	} else {
600		return AE_ERROR;
601	}
602
603	if (ret.eax & 0x1)
604		interface->capability |= ACER_CAP_WIRELESS;
605
606	args.ebx = 2 << 8;
607	args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
608
609	status = wmab_execute(&args, &out);
610	if (ACPI_FAILURE(status))
611		return status;
612
613	obj = (union acpi_object *) out.pointer;
614	if (obj && obj->type == ACPI_TYPE_BUFFER
615	&& obj->buffer.length == sizeof(struct wmab_ret)) {
616		ret = *((struct wmab_ret *) obj->buffer.pointer);
617	} else {
618		return AE_ERROR;
619	}
620
621	if (ret.eax & 0x1)
622		interface->capability |= ACER_CAP_BLUETOOTH;
623
624	kfree(out.pointer);
625
626	/*
627	 * This appears to be safe to enable, since all Wistron based laptops
628	 * appear to use the same EC register for brightness, even if they
629	 * differ for wireless, etc
630	 */
631	if (quirks->brightness >= 0)
632		interface->capability |= ACER_CAP_BRIGHTNESS;
633
634	return AE_OK;
635}
636
637static struct wmi_interface AMW0_interface = {
638	.type = ACER_AMW0,
639};
640
641static struct wmi_interface AMW0_V2_interface = {
642	.type = ACER_AMW0_V2,
643};
644
645/*
646 * New interface (The WMID interface)
647 */
648static acpi_status
649WMI_execute_u32(u32 method_id, u32 in, u32 *out)
650{
651	struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
652	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
653	union acpi_object *obj;
654	u32 tmp;
655	acpi_status status;
656
657	status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
658
659	if (ACPI_FAILURE(status))
660		return status;
661
662	obj = (union acpi_object *) result.pointer;
663	if (obj && obj->type == ACPI_TYPE_BUFFER &&
664		obj->buffer.length == sizeof(u32)) {
665		tmp = *((u32 *) obj->buffer.pointer);
666	} else {
667		tmp = 0;
668	}
669
670	if (out)
671		*out = tmp;
672
673	kfree(result.pointer);
674
675	return status;
676}
677
678static acpi_status WMID_get_u32(u32 *value, u32 cap,
679struct wmi_interface *iface)
680{
681	acpi_status status;
682	u8 tmp;
683	u32 result, method_id = 0;
684
685	switch (cap) {
686	case ACER_CAP_WIRELESS:
687		method_id = ACER_WMID_GET_WIRELESS_METHODID;
688		break;
689	case ACER_CAP_BLUETOOTH:
690		method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
691		break;
692	case ACER_CAP_BRIGHTNESS:
693		method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
694		break;
695	case ACER_CAP_THREEG:
696		method_id = ACER_WMID_GET_THREEG_METHODID;
697		break;
698	case ACER_CAP_MAILLED:
699		if (quirks->mailled == 1) {
700			ec_read(0x9f, &tmp);
701			*value = tmp & 0x1;
702			return 0;
703		}
704	default:
705		return AE_ERROR;
706	}
707	status = WMI_execute_u32(method_id, 0, &result);
708
709	if (ACPI_SUCCESS(status))
710		*value = (u8)result;
711
712	return status;
713}
714
715static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
716{
717	u32 method_id = 0;
718	char param;
719
720	switch (cap) {
721	case ACER_CAP_BRIGHTNESS:
722		if (value > max_brightness)
723			return AE_BAD_PARAMETER;
724		method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
725		break;
726	case ACER_CAP_WIRELESS:
727		if (value > 1)
728			return AE_BAD_PARAMETER;
729		method_id = ACER_WMID_SET_WIRELESS_METHODID;
730		break;
731	case ACER_CAP_BLUETOOTH:
732		if (value > 1)
733			return AE_BAD_PARAMETER;
734		method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
735		break;
736	case ACER_CAP_THREEG:
737		if (value > 1)
738			return AE_BAD_PARAMETER;
739		method_id = ACER_WMID_SET_THREEG_METHODID;
740		break;
741	case ACER_CAP_MAILLED:
742		if (value > 1)
743			return AE_BAD_PARAMETER;
744		if (quirks->mailled == 1) {
745			param = value ? 0x92 : 0x93;
746			i8042_lock_chip();
747			i8042_command(&param, 0x1059);
748			i8042_unlock_chip();
749			return 0;
750		}
751		break;
752	default:
753		return AE_ERROR;
754	}
755	return WMI_execute_u32(method_id, (u32)value, NULL);
756}
757
758static acpi_status WMID_set_capabilities(void)
759{
760	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
761	union acpi_object *obj;
762	acpi_status status;
763	u32 devices;
764
765	status = wmi_query_block(WMID_GUID2, 1, &out);
766	if (ACPI_FAILURE(status))
767		return status;
768
769	obj = (union acpi_object *) out.pointer;
770	if (obj && obj->type == ACPI_TYPE_BUFFER &&
771		obj->buffer.length == sizeof(u32)) {
772		devices = *((u32 *) obj->buffer.pointer);
773	} else {
774		return AE_ERROR;
775	}
776
777	/* Not sure on the meaning of the relevant bits yet to detect these */
778	interface->capability |= ACER_CAP_WIRELESS;
779	interface->capability |= ACER_CAP_THREEG;
780
781	/* WMID always provides brightness methods */
782	interface->capability |= ACER_CAP_BRIGHTNESS;
783
784	if (devices & 0x10)
785		interface->capability |= ACER_CAP_BLUETOOTH;
786
787	if (!(devices & 0x20))
788		max_brightness = 0x9;
789
790	return status;
791}
792
793static struct wmi_interface wmid_interface = {
794	.type = ACER_WMID,
795};
796
797/*
798 * Generic Device (interface-independent)
799 */
800
801static acpi_status get_u32(u32 *value, u32 cap)
802{
803	acpi_status status = AE_ERROR;
804
805	switch (interface->type) {
806	case ACER_AMW0:
807		status = AMW0_get_u32(value, cap, interface);
808		break;
809	case ACER_AMW0_V2:
810		if (cap == ACER_CAP_MAILLED) {
811			status = AMW0_get_u32(value, cap, interface);
812			break;
813		}
814	case ACER_WMID:
815		status = WMID_get_u32(value, cap, interface);
816		break;
817	}
818
819	return status;
820}
821
822static acpi_status set_u32(u32 value, u32 cap)
823{
824	acpi_status status;
825
826	if (interface->capability & cap) {
827		switch (interface->type) {
828		case ACER_AMW0:
829			return AMW0_set_u32(value, cap, interface);
830		case ACER_AMW0_V2:
831			if (cap == ACER_CAP_MAILLED)
832				return AMW0_set_u32(value, cap, interface);
833
834			/*
835			 * On some models, some WMID methods don't toggle
836			 * properly. For those cases, we want to run the AMW0
837			 * method afterwards to be certain we've really toggled
838			 * the device state.
839			 */
840			if (cap == ACER_CAP_WIRELESS ||
841				cap == ACER_CAP_BLUETOOTH) {
842				status = WMID_set_u32(value, cap, interface);
843				if (ACPI_FAILURE(status))
844					return status;
845
846				return AMW0_set_u32(value, cap, interface);
847			}
848		case ACER_WMID:
849			return WMID_set_u32(value, cap, interface);
850		default:
851			return AE_BAD_PARAMETER;
852		}
853	}
854	return AE_BAD_PARAMETER;
855}
856
857static void __init acer_commandline_init(void)
858{
859	/*
860	 * These will all fail silently if the value given is invalid, or the
861	 * capability isn't available on the given interface
862	 */
863	set_u32(mailled, ACER_CAP_MAILLED);
864	set_u32(threeg, ACER_CAP_THREEG);
865	set_u32(brightness, ACER_CAP_BRIGHTNESS);
866}
867
868/*
869 * LED device (Mail LED only, no other LEDs known yet)
870 */
871static void mail_led_set(struct led_classdev *led_cdev,
872enum led_brightness value)
873{
874	set_u32(value, ACER_CAP_MAILLED);
875}
876
877static struct led_classdev mail_led = {
878	.name = "acer-wmi::mail",
879	.brightness_set = mail_led_set,
880};
881
882static int __devinit acer_led_init(struct device *dev)
883{
884	return led_classdev_register(dev, &mail_led);
885}
886
887static void acer_led_exit(void)
888{
889	led_classdev_unregister(&mail_led);
890}
891
892/*
893 * Backlight device
894 */
895static struct backlight_device *acer_backlight_device;
896
897static int read_brightness(struct backlight_device *bd)
898{
899	u32 value;
900	get_u32(&value, ACER_CAP_BRIGHTNESS);
901	return value;
902}
903
904static int update_bl_status(struct backlight_device *bd)
905{
906	int intensity = bd->props.brightness;
907
908	if (bd->props.power != FB_BLANK_UNBLANK)
909		intensity = 0;
910	if (bd->props.fb_blank != FB_BLANK_UNBLANK)
911		intensity = 0;
912
913	set_u32(intensity, ACER_CAP_BRIGHTNESS);
914
915	return 0;
916}
917
918static struct backlight_ops acer_bl_ops = {
919	.get_brightness = read_brightness,
920	.update_status = update_bl_status,
921};
922
923static int __devinit acer_backlight_init(struct device *dev)
924{
925	struct backlight_device *bd;
926
927	bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
928	if (IS_ERR(bd)) {
929		printk(ACER_ERR "Could not register Acer backlight device\n");
930		acer_backlight_device = NULL;
931		return PTR_ERR(bd);
932	}
933
934	acer_backlight_device = bd;
935
936	bd->props.power = FB_BLANK_UNBLANK;
937	bd->props.brightness = read_brightness(bd);
938	bd->props.max_brightness = max_brightness;
939	backlight_update_status(bd);
940	return 0;
941}
942
943static void acer_backlight_exit(void)
944{
945	backlight_device_unregister(acer_backlight_device);
946}
947
948/*
949 * Rfkill devices
950 */
951static void acer_rfkill_update(struct work_struct *ignored);
952static DECLARE_DELAYED_WORK(acer_rfkill_work, acer_rfkill_update);
953static void acer_rfkill_update(struct work_struct *ignored)
954{
955	u32 state;
956	acpi_status status;
957
958	status = get_u32(&state, ACER_CAP_WIRELESS);
959	if (ACPI_SUCCESS(status))
960		rfkill_set_sw_state(wireless_rfkill, !state);
961
962	if (has_cap(ACER_CAP_BLUETOOTH)) {
963		status = get_u32(&state, ACER_CAP_BLUETOOTH);
964		if (ACPI_SUCCESS(status))
965			rfkill_set_sw_state(bluetooth_rfkill, !state);
966	}
967
968	schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
969}
970
971static int acer_rfkill_set(void *data, bool blocked)
972{
973	acpi_status status;
974	u32 cap = (unsigned long)data;
975	status = set_u32(!blocked, cap);
976	if (ACPI_FAILURE(status))
977		return -ENODEV;
978	return 0;
979}
980
981static const struct rfkill_ops acer_rfkill_ops = {
982	.set_block = acer_rfkill_set,
983};
984
985static struct rfkill *acer_rfkill_register(struct device *dev,
986					   enum rfkill_type type,
987					   char *name, u32 cap)
988{
989	int err;
990	struct rfkill *rfkill_dev;
991
992	rfkill_dev = rfkill_alloc(name, dev, type,
993				  &acer_rfkill_ops,
994				  (void *)(unsigned long)cap);
995	if (!rfkill_dev)
996		return ERR_PTR(-ENOMEM);
997
998	err = rfkill_register(rfkill_dev);
999	if (err) {
1000		rfkill_destroy(rfkill_dev);
1001		return ERR_PTR(err);
1002	}
1003	return rfkill_dev;
1004}
1005
1006static int acer_rfkill_init(struct device *dev)
1007{
1008	wireless_rfkill = acer_rfkill_register(dev, RFKILL_TYPE_WLAN,
1009		"acer-wireless", ACER_CAP_WIRELESS);
1010	if (IS_ERR(wireless_rfkill))
1011		return PTR_ERR(wireless_rfkill);
1012
1013	if (has_cap(ACER_CAP_BLUETOOTH)) {
1014		bluetooth_rfkill = acer_rfkill_register(dev,
1015			RFKILL_TYPE_BLUETOOTH, "acer-bluetooth",
1016			ACER_CAP_BLUETOOTH);
1017		if (IS_ERR(bluetooth_rfkill)) {
1018			rfkill_unregister(wireless_rfkill);
1019			rfkill_destroy(wireless_rfkill);
1020			return PTR_ERR(bluetooth_rfkill);
1021		}
1022	}
1023
1024	schedule_delayed_work(&acer_rfkill_work, round_jiffies_relative(HZ));
1025
1026	return 0;
1027}
1028
1029static void acer_rfkill_exit(void)
1030{
1031	cancel_delayed_work_sync(&acer_rfkill_work);
1032
1033	rfkill_unregister(wireless_rfkill);
1034	rfkill_destroy(wireless_rfkill);
1035
1036	if (has_cap(ACER_CAP_BLUETOOTH)) {
1037		rfkill_unregister(bluetooth_rfkill);
1038		rfkill_destroy(bluetooth_rfkill);
1039	}
1040	return;
1041}
1042
1043/*
1044 * sysfs interface
1045 */
1046static ssize_t show_bool_threeg(struct device *dev,
1047	struct device_attribute *attr, char *buf)
1048{
1049	u32 result; \
1050	acpi_status status = get_u32(&result, ACER_CAP_THREEG);
1051	if (ACPI_SUCCESS(status))
1052		return sprintf(buf, "%u\n", result);
1053	return sprintf(buf, "Read error\n");
1054}
1055
1056static ssize_t set_bool_threeg(struct device *dev,
1057	struct device_attribute *attr, const char *buf, size_t count)
1058{
1059	u32 tmp = simple_strtoul(buf, NULL, 10);
1060	acpi_status status = set_u32(tmp, ACER_CAP_THREEG);
1061		if (ACPI_FAILURE(status))
1062			return -EINVAL;
1063	return count;
1064}
1065static DEVICE_ATTR(threeg, S_IWUGO | S_IRUGO | S_IWUSR, show_bool_threeg,
1066	set_bool_threeg);
1067
1068static ssize_t show_interface(struct device *dev, struct device_attribute *attr,
1069	char *buf)
1070{
1071	switch (interface->type) {
1072	case ACER_AMW0:
1073		return sprintf(buf, "AMW0\n");
1074	case ACER_AMW0_V2:
1075		return sprintf(buf, "AMW0 v2\n");
1076	case ACER_WMID:
1077		return sprintf(buf, "WMID\n");
1078	default:
1079		return sprintf(buf, "Error!\n");
1080	}
1081}
1082
1083static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
1084	show_interface, NULL);
1085
1086/*
1087 * debugfs functions
1088 */
1089static u32 get_wmid_devices(void)
1090{
1091	struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
1092	union acpi_object *obj;
1093	acpi_status status;
1094
1095	status = wmi_query_block(WMID_GUID2, 1, &out);
1096	if (ACPI_FAILURE(status))
1097		return 0;
1098
1099	obj = (union acpi_object *) out.pointer;
1100	if (obj && obj->type == ACPI_TYPE_BUFFER &&
1101		obj->buffer.length == sizeof(u32)) {
1102		return *((u32 *) obj->buffer.pointer);
1103	} else {
1104		return 0;
1105	}
1106}
1107
1108/*
1109 * Platform device
1110 */
1111static int __devinit acer_platform_probe(struct platform_device *device)
1112{
1113	int err;
1114
1115	if (has_cap(ACER_CAP_MAILLED)) {
1116		err = acer_led_init(&device->dev);
1117		if (err)
1118			goto error_mailled;
1119	}
1120
1121	if (has_cap(ACER_CAP_BRIGHTNESS)) {
1122		err = acer_backlight_init(&device->dev);
1123		if (err)
1124			goto error_brightness;
1125	}
1126
1127	err = acer_rfkill_init(&device->dev);
1128	if (err)
1129		goto error_rfkill;
1130
1131	return err;
1132
1133error_rfkill:
1134	if (has_cap(ACER_CAP_BRIGHTNESS))
1135		acer_backlight_exit();
1136error_brightness:
1137	if (has_cap(ACER_CAP_MAILLED))
1138		acer_led_exit();
1139error_mailled:
1140	return err;
1141}
1142
1143static int acer_platform_remove(struct platform_device *device)
1144{
1145	if (has_cap(ACER_CAP_MAILLED))
1146		acer_led_exit();
1147	if (has_cap(ACER_CAP_BRIGHTNESS))
1148		acer_backlight_exit();
1149
1150	acer_rfkill_exit();
1151	return 0;
1152}
1153
1154static int acer_platform_suspend(struct platform_device *dev,
1155pm_message_t state)
1156{
1157	u32 value;
1158	struct acer_data *data = &interface->data;
1159
1160	if (!data)
1161		return -ENOMEM;
1162
1163	if (has_cap(ACER_CAP_MAILLED)) {
1164		get_u32(&value, ACER_CAP_MAILLED);
1165		data->mailled = value;
1166	}
1167
1168	if (has_cap(ACER_CAP_BRIGHTNESS)) {
1169		get_u32(&value, ACER_CAP_BRIGHTNESS);
1170		data->brightness = value;
1171	}
1172
1173	return 0;
1174}
1175
1176static int acer_platform_resume(struct platform_device *device)
1177{
1178	struct acer_data *data = &interface->data;
1179
1180	if (!data)
1181		return -ENOMEM;
1182
1183	if (has_cap(ACER_CAP_MAILLED))
1184		set_u32(data->mailled, ACER_CAP_MAILLED);
1185
1186	if (has_cap(ACER_CAP_BRIGHTNESS))
1187		set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
1188
1189	return 0;
1190}
1191
1192static struct platform_driver acer_platform_driver = {
1193	.driver = {
1194		.name = "acer-wmi",
1195		.owner = THIS_MODULE,
1196	},
1197	.probe = acer_platform_probe,
1198	.remove = acer_platform_remove,
1199	.suspend = acer_platform_suspend,
1200	.resume = acer_platform_resume,
1201};
1202
1203static struct platform_device *acer_platform_device;
1204
1205static int remove_sysfs(struct platform_device *device)
1206{
1207	if (has_cap(ACER_CAP_THREEG))
1208		device_remove_file(&device->dev, &dev_attr_threeg);
1209
1210	device_remove_file(&device->dev, &dev_attr_interface);
1211
1212	return 0;
1213}
1214
1215static int create_sysfs(void)
1216{
1217	int retval = -ENOMEM;
1218
1219	if (has_cap(ACER_CAP_THREEG)) {
1220		retval = device_create_file(&acer_platform_device->dev,
1221			&dev_attr_threeg);
1222		if (retval)
1223			goto error_sysfs;
1224	}
1225
1226	retval = device_create_file(&acer_platform_device->dev,
1227		&dev_attr_interface);
1228	if (retval)
1229		goto error_sysfs;
1230
1231	return 0;
1232
1233error_sysfs:
1234		remove_sysfs(acer_platform_device);
1235	return retval;
1236}
1237
1238static void remove_debugfs(void)
1239{
1240	debugfs_remove(interface->debug.devices);
1241	debugfs_remove(interface->debug.root);
1242}
1243
1244static int create_debugfs(void)
1245{
1246	interface->debug.root = debugfs_create_dir("acer-wmi", NULL);
1247	if (!interface->debug.root) {
1248		printk(ACER_ERR "Failed to create debugfs directory");
1249		return -ENOMEM;
1250	}
1251
1252	interface->debug.devices = debugfs_create_u32("devices", S_IRUGO,
1253					interface->debug.root,
1254					&interface->debug.wmid_devices);
1255	if (!interface->debug.devices)
1256		goto error_debugfs;
1257
1258	return 0;
1259
1260error_debugfs:
1261	remove_debugfs();
1262	return -ENOMEM;
1263}
1264
1265static int __init acer_wmi_init(void)
1266{
1267	int err;
1268
1269	printk(ACER_INFO "Acer Laptop ACPI-WMI Extras\n");
1270
1271	if (dmi_check_system(acer_blacklist)) {
1272		printk(ACER_INFO "Blacklisted hardware detected - "
1273				"not loading\n");
1274		return -ENODEV;
1275	}
1276
1277	find_quirks();
1278
1279	/*
1280	 * Detect which ACPI-WMI interface we're using.
1281	 */
1282	if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1283		interface = &AMW0_V2_interface;
1284
1285	if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
1286		interface = &wmid_interface;
1287
1288	if (wmi_has_guid(WMID_GUID2) && interface) {
1289		if (ACPI_FAILURE(WMID_set_capabilities())) {
1290			printk(ACER_ERR "Unable to detect available WMID "
1291					"devices\n");
1292			return -ENODEV;
1293		}
1294	} else if (!wmi_has_guid(WMID_GUID2) && interface) {
1295		printk(ACER_ERR "No WMID device detection method found\n");
1296		return -ENODEV;
1297	}
1298
1299	if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
1300		interface = &AMW0_interface;
1301
1302		if (ACPI_FAILURE(AMW0_set_capabilities())) {
1303			printk(ACER_ERR "Unable to detect available AMW0 "
1304					"devices\n");
1305			return -ENODEV;
1306		}
1307	}
1308
1309	if (wmi_has_guid(AMW0_GUID1))
1310		AMW0_find_mailled();
1311
1312	if (!interface) {
1313		printk(ACER_ERR "No or unsupported WMI interface, unable to "
1314				"load\n");
1315		return -ENODEV;
1316	}
1317
1318	set_quirks();
1319
1320	if (acpi_video_backlight_support() && has_cap(ACER_CAP_BRIGHTNESS)) {
1321		interface->capability &= ~ACER_CAP_BRIGHTNESS;
1322		printk(ACER_INFO "Brightness must be controlled by "
1323		       "generic video driver\n");
1324	}
1325
1326	if (platform_driver_register(&acer_platform_driver)) {
1327		printk(ACER_ERR "Unable to register platform driver.\n");
1328		goto error_platform_register;
1329	}
1330	acer_platform_device = platform_device_alloc("acer-wmi", -1);
1331	platform_device_add(acer_platform_device);
1332
1333	err = create_sysfs();
1334	if (err)
1335		return err;
1336
1337	if (wmi_has_guid(WMID_GUID2)) {
1338		interface->debug.wmid_devices = get_wmid_devices();
1339		err = create_debugfs();
1340		if (err)
1341			return err;
1342	}
1343
1344	/* Override any initial settings with values from the commandline */
1345	acer_commandline_init();
1346
1347	return 0;
1348
1349error_platform_register:
1350	return -ENODEV;
1351}
1352
1353static void __exit acer_wmi_exit(void)
1354{
1355	remove_sysfs(acer_platform_device);
1356	remove_debugfs();
1357	platform_device_del(acer_platform_device);
1358	platform_driver_unregister(&acer_platform_driver);
1359
1360	printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
1361	return;
1362}
1363
1364module_init(acer_wmi_init);
1365module_exit(acer_wmi_exit);
1366