summaryrefslogtreecommitdiff
path: root/drivers/platform/x86/alienware-wmi.c
blob: 0831b428c217549f6d42a6d1543d4ed0cb539535 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
/*
 * Alienware AlienFX control
 *
 * Copyright (C) 2014 Dell Inc <mario_limonciello@dell.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dmi.h>
#include <linux/leds.h>

#define LEGACY_CONTROL_GUID		"A90597CE-A997-11DA-B012-B622A1EF5492"
#define LEGACY_POWER_CONTROL_GUID	"A80593CE-A997-11DA-B012-B622A1EF5492"
#define WMAX_CONTROL_GUID		"A70591CE-A997-11DA-B012-B622A1EF5492"

#define WMAX_METHOD_HDMI_SOURCE		0x1
#define WMAX_METHOD_HDMI_STATUS		0x2
#define WMAX_METHOD_BRIGHTNESS		0x3
#define WMAX_METHOD_ZONE_CONTROL	0x4
#define WMAX_METHOD_HDMI_CABLE		0x5
#define WMAX_METHOD_AMPLIFIER_CABLE	0x6
#define WMAX_METHOD_DEEP_SLEEP_CONTROL	0x0B
#define WMAX_METHOD_DEEP_SLEEP_STATUS	0x0C

MODULE_AUTHOR("Mario Limonciello <mario_limonciello@dell.com>");
MODULE_DESCRIPTION("Alienware special feature control");
MODULE_LICENSE("GPL");
MODULE_ALIAS("wmi:" LEGACY_CONTROL_GUID);
MODULE_ALIAS("wmi:" WMAX_CONTROL_GUID);

enum INTERFACE_FLAGS {
	LEGACY,
	WMAX,
};

enum LEGACY_CONTROL_STATES {
	LEGACY_RUNNING = 1,
	LEGACY_BOOTING = 0,
	LEGACY_SUSPEND = 3,
};

enum WMAX_CONTROL_STATES {
	WMAX_RUNNING = 0xFF,
	WMAX_BOOTING = 0,
	WMAX_SUSPEND = 3,
};

struct quirk_entry {
	u8 num_zones;
	u8 hdmi_mux;
	u8 amplifier;
	u8 deepslp;
};

static struct quirk_entry *quirks;

static struct quirk_entry quirk_unknown = {
	.num_zones = 2,
	.hdmi_mux = 0,
	.amplifier = 0,
	.deepslp = 0,
};

static struct quirk_entry quirk_x51_r1_r2 = {
	.num_zones = 3,
	.hdmi_mux = 0,
	.amplifier = 0,
	.deepslp = 0,
};

static struct quirk_entry quirk_x51_r3 = {
	.num_zones = 4,
	.hdmi_mux = 0,
	.amplifier = 1,
	.deepslp = 0,
};

static struct quirk_entry quirk_asm100 = {
	.num_zones = 2,
	.hdmi_mux = 1,
	.amplifier = 0,
	.deepslp = 0,
};

static struct quirk_entry quirk_asm200 = {
	.num_zones = 2,
	.hdmi_mux = 1,
	.amplifier = 0,
	.deepslp = 1,
};

static struct quirk_entry quirk_asm201 = {
	.num_zones = 2,
	.hdmi_mux = 1,
	.amplifier = 1,
	.deepslp = 1,
};

static int __init dmi_matched(const struct dmi_system_id *dmi)
{
	quirks = dmi->driver_data;
	return 1;
}

static const struct dmi_system_id alienware_quirks[] __initconst = {
	{
	 .callback = dmi_matched,
	 .ident = "Alienware X51 R3",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R3"),
		     },
	 .driver_data = &quirk_x51_r3,
	 },
	{
	 .callback = dmi_matched,
	 .ident = "Alienware X51 R2",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R2"),
		     },
	 .driver_data = &quirk_x51_r1_r2,
	 },
	{
	 .callback = dmi_matched,
	 .ident = "Alienware X51 R1",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51"),
		     },
	 .driver_data = &quirk_x51_r1_r2,
	 },
	{
	 .callback = dmi_matched,
	 .ident = "Alienware ASM100",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "ASM100"),
		     },
	 .driver_data = &quirk_asm100,
	 },
	{
	 .callback = dmi_matched,
	 .ident = "Alienware ASM200",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "ASM200"),
		     },
	 .driver_data = &quirk_asm200,
	 },
	{
	 .callback = dmi_matched,
	 .ident = "Alienware ASM201",
	 .matches = {
		     DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
		     DMI_MATCH(DMI_PRODUCT_NAME, "ASM201"),
		     },
	 .driver_data = &quirk_asm201,
	 },
	{}
};

struct color_platform {
	u8 blue;
	u8 green;
	u8 red;
} __packed;

struct platform_zone {
	u8 location;
	struct device_attribute *attr;
	struct color_platform colors;
};

struct wmax_brightness_args {
	u32 led_mask;
	u32 percentage;
};

struct wmax_basic_args {
	u8 arg;
};

struct legacy_led_args {
	struct color_platform colors;
	u8 brightness;
	u8 state;
} __packed;

struct wmax_led_args {
	u32 led_mask;
	struct color_platform colors;
	u8 state;
} __packed;

static struct platform_device *platform_device;
static struct device_attribute *zone_dev_attrs;
static struct attribute **zone_attrs;
static struct platform_zone *zone_data;

static struct platform_driver platform_driver = {
	.driver = {
		   .name = "alienware-wmi",
		   }
};

static struct attribute_group zone_attribute_group = {
	.name = "rgb_zones",
};

static u8 interface;
static u8 lighting_control_state;
static u8 global_brightness;

/*
 * Helpers used for zone control
 */
static int parse_rgb(const char *buf, struct platform_zone *zone)
{
	long unsigned int rgb;
	int ret;
	union color_union {
		struct color_platform cp;
		int package;
	} repackager;

	ret = kstrtoul(buf, 16, &rgb);
	if (ret)
		return ret;

	/* RGB triplet notation is 24-bit hexadecimal */
	if (rgb > 0xFFFFFF)
		return -EINVAL;

	repackager.package = rgb & 0x0f0f0f0f;
	pr_debug("alienware-wmi: r: %d g:%d b: %d\n",
		 repackager.cp.red, repackager.cp.green, repackager.cp.blue);
	zone->colors = repackager.cp;
	return 0;
}

static struct platform_zone *match_zone(struct device_attribute *attr)
{
	int i;
	for (i = 0; i < quirks->num_zones; i++) {
		if ((struct device_attribute *)zone_data[i].attr == attr) {
			pr_debug("alienware-wmi: matched zone location: %d\n",
				 zone_data[i].location);
			return &zone_data[i];
		}
	}
	return NULL;
}

/*
 * Individual RGB zone control
 */
static int alienware_update_led(struct platform_zone *zone)
{
	int method_id;
	acpi_status status;
	char *guid;
	struct acpi_buffer input;
	struct legacy_led_args legacy_args;
	struct wmax_led_args wmax_basic_args;
	if (interface == WMAX) {
		wmax_basic_args.led_mask = 1 << zone->location;
		wmax_basic_args.colors = zone->colors;
		wmax_basic_args.state = lighting_control_state;
		guid = WMAX_CONTROL_GUID;
		method_id = WMAX_METHOD_ZONE_CONTROL;

		input.length = (acpi_size) sizeof(wmax_basic_args);
		input.pointer = &wmax_basic_args;
	} else {
		legacy_args.colors = zone->colors;
		legacy_args.brightness = global_brightness;
		legacy_args.state = 0;
		if (lighting_control_state == LEGACY_BOOTING ||
		    lighting_control_state == LEGACY_SUSPEND) {
			guid = LEGACY_POWER_CONTROL_GUID;
			legacy_args.state = lighting_control_state;
		} else
			guid = LEGACY_CONTROL_GUID;
		method_id = zone->location + 1;

		input.length = (acpi_size) sizeof(legacy_args);
		input.pointer = &legacy_args;
	}
	pr_debug("alienware-wmi: guid %s method %d\n", guid, method_id);

	status = wmi_evaluate_method(guid, 0, method_id, &input, NULL);
	if (ACPI_FAILURE(status))
		pr_err("alienware-wmi: zone set failure: %u\n", status);
	return ACPI_FAILURE(status);
}

static ssize_t zone_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	struct platform_zone *target_zone;
	target_zone = match_zone(attr);
	if (target_zone == NULL)
		return sprintf(buf, "red: -1, green: -1, blue: -1\n");
	return sprintf(buf, "red: %d, green: %d, blue: %d\n",
		       target_zone->colors.red,
		       target_zone->colors.green, target_zone->colors.blue);

}

static ssize_t zone_set(struct device *dev, struct device_attribute *attr,
			const char *buf, size_t count)
{
	struct platform_zone *target_zone;
	int ret;
	target_zone = match_zone(attr);
	if (target_zone == NULL) {
		pr_err("alienware-wmi: invalid target zone\n");
		return 1;
	}
	ret = parse_rgb(buf, target_zone);
	if (ret)
		return ret;
	ret = alienware_update_led(target_zone);
	return ret ? ret : count;
}

/*
 * LED Brightness (Global)
 */
static int wmax_brightness(int brightness)
{
	acpi_status status;
	struct acpi_buffer input;
	struct wmax_brightness_args args = {
		.led_mask = 0xFF,
		.percentage = brightness,
	};
	input.length = (acpi_size) sizeof(args);
	input.pointer = &args;
	status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
				     WMAX_METHOD_BRIGHTNESS, &input, NULL);
	if (ACPI_FAILURE(status))
		pr_err("alienware-wmi: brightness set failure: %u\n", status);
	return ACPI_FAILURE(status);
}

static void global_led_set(struct led_classdev *led_cdev,
			   enum led_brightness brightness)
{
	int ret;
	global_brightness = brightness;
	if (interface == WMAX)
		ret = wmax_brightness(brightness);
	else
		ret = alienware_update_led(&zone_data[0]);
	if (ret)
		pr_err("LED brightness update failed\n");
}

static enum led_brightness global_led_get(struct led_classdev *led_cdev)
{
	return global_brightness;
}

static struct led_classdev global_led = {
	.brightness_set = global_led_set,
	.brightness_get = global_led_get,
	.name = "alienware::global_brightness",
};

/*
 * Lighting control state device attribute (Global)
 */
static ssize_t show_control_state(struct device *dev,
				  struct device_attribute *attr, char *buf)
{
	if (lighting_control_state == LEGACY_BOOTING)
		return scnprintf(buf, PAGE_SIZE, "[booting] running suspend\n");
	else if (lighting_control_state == LEGACY_SUSPEND)
		return scnprintf(buf, PAGE_SIZE, "booting running [suspend]\n");
	return scnprintf(buf, PAGE_SIZE, "booting [running] suspend\n");
}

static ssize_t store_control_state(struct device *dev,
				   struct device_attribute *attr,
				   const char *buf, size_t count)
{
	long unsigned int val;
	if (strcmp(buf, "booting\n") == 0)
		val = LEGACY_BOOTING;
	else if (strcmp(buf, "suspend\n") == 0)
		val = LEGACY_SUSPEND;
	else if (interface == LEGACY)
		val = LEGACY_RUNNING;
	else
		val = WMAX_RUNNING;
	lighting_control_state = val;
	pr_debug("alienware-wmi: updated control state to %d\n",
		 lighting_control_state);
	return count;
}

static DEVICE_ATTR(lighting_control_state, 0644, show_control_state,
		   store_control_state);

static int alienware_zone_init(struct platform_device *dev)
{
	int i;
	char buffer[10];
	char *name;

	if (interface == WMAX) {
		lighting_control_state = WMAX_RUNNING;
	} else if (interface == LEGACY) {
		lighting_control_state = LEGACY_RUNNING;
	}
	global_led.max_brightness = 0x0F;
	global_brightness = global_led.max_brightness;

	/*
	 *      - zone_dev_attrs num_zones + 1 is for individual zones and then
	 *        null terminated
	 *      - zone_attrs num_zones + 2 is for all attrs in zone_dev_attrs +
	 *        the lighting control + null terminated
	 *      - zone_data num_zones is for the distinct zones
	 */
	zone_dev_attrs =
	    kzalloc(sizeof(struct device_attribute) * (quirks->num_zones + 1),
		    GFP_KERNEL);
	if (!zone_dev_attrs)
		return -ENOMEM;

	zone_attrs =
	    kzalloc(sizeof(struct attribute *) * (quirks->num_zones + 2),
		    GFP_KERNEL);
	if (!zone_attrs)
		return -ENOMEM;

	zone_data =
	    kzalloc(sizeof(struct platform_zone) * (quirks->num_zones),
		    GFP_KERNEL);
	if (!zone_data)
		return -ENOMEM;

	for (i = 0; i < quirks->num_zones; i++) {
		sprintf(buffer, "zone%02X", i);
		name = kstrdup(buffer, GFP_KERNEL);
		if (name == NULL)
			return 1;
		sysfs_attr_init(&zone_dev_attrs[i].attr);
		zone_dev_attrs[i].attr.name = name;
		zone_dev_attrs[i].attr.mode = 0644;
		zone_dev_attrs[i].show = zone_show;
		zone_dev_attrs[i].store = zone_set;
		zone_data[i].location = i;
		zone_attrs[i] = &zone_dev_attrs[i].attr;
		zone_data[i].attr = &zone_dev_attrs[i];
	}
	zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
	zone_attribute_group.attrs = zone_attrs;

	led_classdev_register(&dev->dev, &global_led);

	return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
}

static void alienware_zone_exit(struct platform_device *dev)
{
	sysfs_remove_group(&dev->dev.kobj, &zone_attribute_group);
	led_classdev_unregister(&global_led);
	if (zone_dev_attrs) {
		int i;
		for (i = 0; i < quirks->num_zones; i++)
			kfree(zone_dev_attrs[i].attr.name);
	}
	kfree(zone_dev_attrs);
	kfree(zone_data);
	kfree(zone_attrs);
}

static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
					  u32 command, int *out_data)
{
	acpi_status status;
	union acpi_object *obj;
	struct acpi_buffer input;
	struct acpi_buffer output;

	input.length = (acpi_size) sizeof(*in_args);
	input.pointer = in_args;
	if (out_data != NULL) {
		output.length = ACPI_ALLOCATE_BUFFER;
		output.pointer = NULL;
		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
					     command, &input, &output);
	} else
		status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
					     command, &input, NULL);

	if (ACPI_SUCCESS(status) && out_data != NULL) {
		obj = (union acpi_object *)output.pointer;
		if (obj && obj->type == ACPI_TYPE_INTEGER)
			*out_data = (u32) obj->integer.value;
	}
	return status;

}

/*
 *	The HDMI mux sysfs node indicates the status of the HDMI input mux.
 *	It can toggle between standard system GPU output and HDMI input.
 */
static ssize_t show_hdmi_cable(struct device *dev,
			       struct device_attribute *attr, char *buf)
{
	acpi_status status;
	u32 out_data;
	struct wmax_basic_args in_args = {
		.arg = 0,
	};
	status =
	    alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_CABLE,
				   (u32 *) &out_data);
	if (ACPI_SUCCESS(status)) {
		if (out_data == 0)
			return scnprintf(buf, PAGE_SIZE,
					 "[unconnected] connected unknown\n");
		else if (out_data == 1)
			return scnprintf(buf, PAGE_SIZE,
					 "unconnected [connected] unknown\n");
	}
	pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
	return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
}

static ssize_t show_hdmi_source(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	acpi_status status;
	u32 out_data;
	struct wmax_basic_args in_args = {
		.arg = 0,
	};
	status =
	    alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_STATUS,
				   (u32 *) &out_data);

	if (ACPI_SUCCESS(status)) {
		if (out_data == 1)
			return scnprintf(buf, PAGE_SIZE,
					 "[input] gpu unknown\n");
		else if (out_data == 2)
			return scnprintf(buf, PAGE_SIZE,
					 "input [gpu] unknown\n");
	}
	pr_err("alienware-wmi: unknown HDMI source status: %d\n", out_data);
	return scnprintf(buf, PAGE_SIZE, "input gpu [unknown]\n");
}

static ssize_t toggle_hdmi_source(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	acpi_status status;
	struct wmax_basic_args args;
	if (strcmp(buf, "gpu\n") == 0)
		args.arg = 1;
	else if (strcmp(buf, "input\n") == 0)
		args.arg = 2;
	else
		args.arg = 3;
	pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);

	status = alienware_wmax_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);

	if (ACPI_FAILURE(status))
		pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
		       status);
	return count;
}

static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
		   toggle_hdmi_source);

static struct attribute *hdmi_attrs[] = {
	&dev_attr_cable.attr,
	&dev_attr_source.attr,
	NULL,
};

static const struct attribute_group hdmi_attribute_group = {
	.name = "hdmi",
	.attrs = hdmi_attrs,
};

static void remove_hdmi(struct platform_device *dev)
{
	if (quirks->hdmi_mux > 0)
		sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
}

static int create_hdmi(struct platform_device *dev)
{
	int ret;

	ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
	if (ret)
		remove_hdmi(dev);
	return ret;
}

/*
 * Alienware GFX amplifier support
 * - Currently supports reading cable status
 * - Leaving expansion room to possibly support dock/undock events later
 */
static ssize_t show_amplifier_status(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	acpi_status status;
	u32 out_data;
	struct wmax_basic_args in_args = {
		.arg = 0,
	};
	status =
	    alienware_wmax_command(&in_args, WMAX_METHOD_AMPLIFIER_CABLE,
				   (u32 *) &out_data);
	if (ACPI_SUCCESS(status)) {
		if (out_data == 0)
			return scnprintf(buf, PAGE_SIZE,
					 "[unconnected] connected unknown\n");
		else if (out_data == 1)
			return scnprintf(buf, PAGE_SIZE,
					 "unconnected [connected] unknown\n");
	}
	pr_err("alienware-wmi: unknown amplifier cable status: %d\n", status);
	return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
}

static DEVICE_ATTR(status, S_IRUGO, show_amplifier_status, NULL);

static struct attribute *amplifier_attrs[] = {
	&dev_attr_status.attr,
	NULL,
};

static const struct attribute_group amplifier_attribute_group = {
	.name = "amplifier",
	.attrs = amplifier_attrs,
};

static void remove_amplifier(struct platform_device *dev)
{
	if (quirks->amplifier > 0)
		sysfs_remove_group(&dev->dev.kobj, &amplifier_attribute_group);
}

static int create_amplifier(struct platform_device *dev)
{
	int ret;

	ret = sysfs_create_group(&dev->dev.kobj, &amplifier_attribute_group);
	if (ret)
		remove_amplifier(dev);
	return ret;
}

/*
 * Deep Sleep Control support
 * - Modifies BIOS setting for deep sleep control allowing extra wakeup events
 */
static ssize_t show_deepsleep_status(struct device *dev,
				     struct device_attribute *attr, char *buf)
{
	acpi_status status;
	u32 out_data;
	struct wmax_basic_args in_args = {
		.arg = 0,
	};
	status = alienware_wmax_command(&in_args, WMAX_METHOD_DEEP_SLEEP_STATUS,
					(u32 *) &out_data);
	if (ACPI_SUCCESS(status)) {
		if (out_data == 0)
			return scnprintf(buf, PAGE_SIZE,
					 "[disabled] s5 s5_s4\n");
		else if (out_data == 1)
			return scnprintf(buf, PAGE_SIZE,
					 "disabled [s5] s5_s4\n");
		else if (out_data == 2)
			return scnprintf(buf, PAGE_SIZE,
					 "disabled s5 [s5_s4]\n");
	}
	pr_err("alienware-wmi: unknown deep sleep status: %d\n", status);
	return scnprintf(buf, PAGE_SIZE, "disabled s5 s5_s4 [unknown]\n");
}

static ssize_t toggle_deepsleep(struct device *dev,
				struct device_attribute *attr,
				const char *buf, size_t count)
{
	acpi_status status;
	struct wmax_basic_args args;

	if (strcmp(buf, "disabled\n") == 0)
		args.arg = 0;
	else if (strcmp(buf, "s5\n") == 0)
		args.arg = 1;
	else
		args.arg = 2;
	pr_debug("alienware-wmi: setting deep sleep to %d : %s", args.arg, buf);

	status = alienware_wmax_command(&args, WMAX_METHOD_DEEP_SLEEP_CONTROL,
					NULL);

	if (ACPI_FAILURE(status))
		pr_err("alienware-wmi: deep sleep control failed: results: %u\n",
			status);
	return count;
}

static DEVICE_ATTR(deepsleep, S_IRUGO | S_IWUSR, show_deepsleep_status, toggle_deepsleep);

static struct attribute *deepsleep_attrs[] = {
	&dev_attr_deepsleep.attr,
	NULL,
};

static const struct attribute_group deepsleep_attribute_group = {
	.name = "deepsleep",
	.attrs = deepsleep_attrs,
};

static void remove_deepsleep(struct platform_device *dev)
{
	if (quirks->deepslp > 0)
		sysfs_remove_group(&dev->dev.kobj, &deepsleep_attribute_group);
}

static int create_deepsleep(struct platform_device *dev)
{
	int ret;

	ret = sysfs_create_group(&dev->dev.kobj, &deepsleep_attribute_group);
	if (ret)
		remove_deepsleep(dev);
	return ret;
}

static int __init alienware_wmi_init(void)
{
	int ret;

	if (wmi_has_guid(LEGACY_CONTROL_GUID))
		interface = LEGACY;
	else if (wmi_has_guid(WMAX_CONTROL_GUID))
		interface = WMAX;
	else {
		pr_warn("alienware-wmi: No known WMI GUID found\n");
		return -ENODEV;
	}

	dmi_check_system(alienware_quirks);
	if (quirks == NULL)
		quirks = &quirk_unknown;

	ret = platform_driver_register(&platform_driver);
	if (ret)
		goto fail_platform_driver;
	platform_device = platform_device_alloc("alienware-wmi", -1);
	if (!platform_device) {
		ret = -ENOMEM;
		goto fail_platform_device1;
	}
	ret = platform_device_add(platform_device);
	if (ret)
		goto fail_platform_device2;

	if (quirks->hdmi_mux > 0) {
		ret = create_hdmi(platform_device);
		if (ret)
			goto fail_prep_hdmi;
	}

	if (quirks->amplifier > 0) {
		ret = create_amplifier(platform_device);
		if (ret)
			goto fail_prep_amplifier;
	}

	if (quirks->deepslp > 0) {
		ret = create_deepsleep(platform_device);
		if (ret)
			goto fail_prep_deepsleep;
	}

	ret = alienware_zone_init(platform_device);
	if (ret)
		goto fail_prep_zones;

	return 0;

fail_prep_zones:
	alienware_zone_exit(platform_device);
fail_prep_deepsleep:
fail_prep_amplifier:
fail_prep_hdmi:
	platform_device_del(platform_device);
fail_platform_device2:
	platform_device_put(platform_device);
fail_platform_device1:
	platform_driver_unregister(&platform_driver);
fail_platform_driver:
	return ret;
}

module_init(alienware_wmi_init);

static void __exit alienware_wmi_exit(void)
{
	if (platform_device) {
		alienware_zone_exit(platform_device);
		remove_hdmi(platform_device);
		platform_device_unregister(platform_device);
		platform_driver_unregister(&platform_driver);
	}
}

module_exit(alienware_wmi_exit);