summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/wm8770.c
blob: 5bce2101348514aa6508dc9dac7f895d176ae0d9 (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
/*
 * wm8770.c  --  WM8770 ALSA SoC Audio driver
 *
 * Copyright 2010 Wolfson Microelectronics plc
 *
 * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/of_device.h>
#include <linux/pm.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8770.h"

#define WM8770_NUM_SUPPLIES 3
static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
	"AVDD1",
	"AVDD2",
	"DVDD"
};

static const struct reg_default wm8770_reg_defaults[] = {
	{  0, 0x7f },
	{  1, 0x7f },
	{  2, 0x7f },
	{  3, 0x7f },
	{  4, 0x7f },
	{  5, 0x7f },
	{  6, 0x7f },
	{  7, 0x7f },
	{  8, 0x7f },
	{  9, 0xff },
	{ 10, 0xff },
	{ 11, 0xff },
	{ 12, 0xff },
	{ 13, 0xff },
	{ 14, 0xff },
	{ 15, 0xff },
	{ 16, 0xff },
	{ 17, 0xff },
	{ 18, 0    },
	{ 19, 0x90 },
	{ 20, 0    },
	{ 21, 0    },
	{ 22, 0x22 },
	{ 23, 0x22 },
	{ 24, 0x3e },
	{ 25, 0xc  },
	{ 26, 0xc  },
	{ 27, 0x100 },
	{ 28, 0x189 },
	{ 29, 0x189 },
	{ 30, 0x8770 },
};

static bool wm8770_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case WM8770_RESET:
		return true;
	default:
		return false;
	}
}

struct wm8770_priv {
	struct regmap *regmap;
	struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
	struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
	struct snd_soc_codec *codec;
	int sysclk;
};

static int vout12supply_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event);
static int vout34supply_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event);

/*
 * We can't use the same notifier block for more than one supply and
 * there's no way I can see to get from a callback to the caller
 * except container_of().
 */
#define WM8770_REGULATOR_EVENT(n) \
static int wm8770_regulator_event_##n(struct notifier_block *nb, \
				      unsigned long event, void *data)    \
{ \
	struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
				     disable_nb[n]); \
	if (event & REGULATOR_EVENT_DISABLE) { \
		regcache_mark_dirty(wm8770->regmap);	\
	} \
	return 0; \
}

WM8770_REGULATOR_EVENT(0)
WM8770_REGULATOR_EVENT(1)
WM8770_REGULATOR_EVENT(2)

static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);

static const char *dac_phase_text[][2] = {
	{ "DAC1 Normal", "DAC1 Inverted" },
	{ "DAC2 Normal", "DAC2 Inverted" },
	{ "DAC3 Normal", "DAC3 Inverted" },
	{ "DAC4 Normal", "DAC4 Inverted" },
};

static const struct soc_enum dac_phase[] = {
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
};

static const struct snd_kcontrol_new wm8770_snd_controls[] = {
	/* global DAC playback controls */
	SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
		dac_dig_tlv),
	SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
	SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),

	/* global VOUT playback controls */
	SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
		dac_alg_tlv),
	SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),

	/* VOUT1/2/3/4 specific controls */
	SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
		WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
		WM8770_VOUT1RVOL, 7, 1, 0),
	SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
		WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
		WM8770_VOUT2RVOL, 7, 1, 0),
	SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
		WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
		WM8770_VOUT3RVOL, 7, 1, 0),
	SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
		WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
		WM8770_VOUT4RVOL, 7, 1, 0),

	/* DAC1/2/3/4 specific controls */
	SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
		WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
	SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
	SOC_ENUM("DAC1 Phase", dac_phase[0]),
	SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
		WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
	SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
	SOC_ENUM("DAC2 Phase", dac_phase[1]),
	SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
		WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
	SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
	SOC_ENUM("DAC3 Phase", dac_phase[2]),
	SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
		WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
	SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
	SOC_ENUM("DAC4 Phase", dac_phase[3]),

	/* ADC specific controls */
	SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
		0, 31, 0, adc_tlv),
	SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
		5, 1, 1),

	/* other controls */
	SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
	SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
};

static const char *ain_text[] = {
	"AIN1", "AIN2", "AIN3", "AIN4",
	"AIN5", "AIN6", "AIN7", "AIN8"
};

static SOC_ENUM_DOUBLE_DECL(ain_enum,
			    WM8770_ADCMUX, 0, 4, ain_text);

static const struct snd_kcontrol_new ain_mux =
	SOC_DAPM_ENUM("Capture Mux", ain_enum);

static const struct snd_kcontrol_new vout1_mix_controls[] = {
	SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
	SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
	SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
};

static const struct snd_kcontrol_new vout2_mix_controls[] = {
	SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
	SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
	SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
};

static const struct snd_kcontrol_new vout3_mix_controls[] = {
	SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
	SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
	SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
};

static const struct snd_kcontrol_new vout4_mix_controls[] = {
	SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
	SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
};

static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("AUX1"),
	SND_SOC_DAPM_INPUT("AUX2"),
	SND_SOC_DAPM_INPUT("AUX3"),

	SND_SOC_DAPM_INPUT("AIN1"),
	SND_SOC_DAPM_INPUT("AIN2"),
	SND_SOC_DAPM_INPUT("AIN3"),
	SND_SOC_DAPM_INPUT("AIN4"),
	SND_SOC_DAPM_INPUT("AIN5"),
	SND_SOC_DAPM_INPUT("AIN6"),
	SND_SOC_DAPM_INPUT("AIN7"),
	SND_SOC_DAPM_INPUT("AIN8"),

	SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),

	SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),

	SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
	SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
	SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
	SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),

	SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
		vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
		vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),

	SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
		vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
	SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
		vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
	SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
		vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
	SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
		vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),

	SND_SOC_DAPM_OUTPUT("VOUT1"),
	SND_SOC_DAPM_OUTPUT("VOUT2"),
	SND_SOC_DAPM_OUTPUT("VOUT3"),
	SND_SOC_DAPM_OUTPUT("VOUT4")
};

static const struct snd_soc_dapm_route wm8770_intercon[] = {
	{ "Capture Mux", "AIN1", "AIN1" },
	{ "Capture Mux", "AIN2", "AIN2" },
	{ "Capture Mux", "AIN3", "AIN3" },
	{ "Capture Mux", "AIN4", "AIN4" },
	{ "Capture Mux", "AIN5", "AIN5" },
	{ "Capture Mux", "AIN6", "AIN6" },
	{ "Capture Mux", "AIN7", "AIN7" },
	{ "Capture Mux", "AIN8", "AIN8" },

	{ "ADC", NULL, "Capture Mux" },

	{ "VOUT1 Mixer", NULL, "VOUT12 Supply" },
	{ "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
	{ "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
	{ "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },

	{ "VOUT2 Mixer", NULL, "VOUT12 Supply" },
	{ "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
	{ "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
	{ "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },

	{ "VOUT3 Mixer", NULL, "VOUT34 Supply" },
	{ "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
	{ "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
	{ "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },

	{ "VOUT4 Mixer", NULL, "VOUT34 Supply" },
	{ "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
	{ "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },

	{ "VOUT1", NULL, "VOUT1 Mixer" },
	{ "VOUT2", NULL, "VOUT2 Mixer" },
	{ "VOUT3", NULL, "VOUT3 Mixer" },
	{ "VOUT4", NULL, "VOUT4 Mixer" }
};

static int vout12supply_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_codec *codec;

	codec = w->codec;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0);
		break;
	case SND_SOC_DAPM_POST_PMD:
		snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0x180);
		break;
	}

	return 0;
}

static int vout34supply_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event)
{
	struct snd_soc_codec *codec;

	codec = w->codec;

	switch (event) {
	case SND_SOC_DAPM_PRE_PMU:
		snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0);
		break;
	case SND_SOC_DAPM_POST_PMD:
		snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0x180);
		break;
	}

	return 0;
}

static int wm8770_reset(struct snd_soc_codec *codec)
{
	return snd_soc_write(codec, WM8770_RESET, 0);
}

static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct snd_soc_codec *codec;
	int iface, master;

	codec = dai->codec;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		master = 0x100;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		master = 0;
		break;
	default:
		return -EINVAL;
	}

	iface = 0;
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 0x2;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface |= 0x1;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0xc;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |= 0x8;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x4;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, WM8770_IFACECTRL, 0xf, iface);
	snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x100, master);

	return 0;
}

static const int mclk_ratios[] = {
	128,
	192,
	256,
	384,
	512,
	768
};

static int wm8770_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_codec *codec;
	struct wm8770_priv *wm8770;
	int i;
	int iface;
	int shift;
	int ratio;

	codec = dai->codec;
	wm8770 = snd_soc_codec_get_drvdata(codec);

	iface = 0;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface |= 0x10;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface |= 0x20;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface |= 0x30;
		break;
	}

	switch (substream->stream) {
	case SNDRV_PCM_STREAM_PLAYBACK:
		i = 0;
		shift = 4;
		break;
	case SNDRV_PCM_STREAM_CAPTURE:
		i = 2;
		shift = 0;
		break;
	default:
		return -EINVAL;
	}

	/* Only need to set MCLK/LRCLK ratio if we're master */
	if (snd_soc_read(codec, WM8770_MSTRCTRL) & 0x100) {
		for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
			ratio = wm8770->sysclk / params_rate(params);
			if (ratio == mclk_ratios[i])
				break;
		}

		if (i == ARRAY_SIZE(mclk_ratios)) {
			dev_err(codec->dev,
				"Unable to configure MCLK ratio %d/%d\n",
				wm8770->sysclk, params_rate(params));
			return -EINVAL;
		}

		dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);

		snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x7 << shift,
				    i << shift);
	}

	snd_soc_update_bits(codec, WM8770_IFACECTRL, 0x30, iface);

	return 0;
}

static int wm8770_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec;

	codec = dai->codec;
	return snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10,
				   !!mute << 4);
}

static int wm8770_set_sysclk(struct snd_soc_dai *dai,
			     int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec;
	struct wm8770_priv *wm8770;

	codec = dai->codec;
	wm8770 = snd_soc_codec_get_drvdata(codec);
	wm8770->sysclk = freq;
	return 0;
}

static int wm8770_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	int ret;
	struct wm8770_priv *wm8770;

	wm8770 = snd_soc_codec_get_drvdata(codec);

	switch (level) {
	case SND_SOC_BIAS_ON:
		break;
	case SND_SOC_BIAS_PREPARE:
		break;
	case SND_SOC_BIAS_STANDBY:
		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
			ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
						    wm8770->supplies);
			if (ret) {
				dev_err(codec->dev,
					"Failed to enable supplies: %d\n",
					ret);
				return ret;
			}

			regcache_sync(wm8770->regmap);

			/* global powerup */
			snd_soc_write(codec, WM8770_PWDNCTRL, 0);
		}
		break;
	case SND_SOC_BIAS_OFF:
		/* global powerdown */
		snd_soc_write(codec, WM8770_PWDNCTRL, 1);
		regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
				       wm8770->supplies);
		break;
	}

	codec->dapm.bias_level = level;
	return 0;
}

#define WM8770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

static const struct snd_soc_dai_ops wm8770_dai_ops = {
	.digital_mute = wm8770_mute,
	.hw_params = wm8770_hw_params,
	.set_fmt = wm8770_set_fmt,
	.set_sysclk = wm8770_set_sysclk,
};

static struct snd_soc_dai_driver wm8770_dai = {
	.name = "wm8770-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_192000,
		.formats = WM8770_FORMATS
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_8000_96000,
		.formats = WM8770_FORMATS
	},
	.ops = &wm8770_dai_ops,
	.symmetric_rates = 1
};

static int wm8770_probe(struct snd_soc_codec *codec)
{
	struct wm8770_priv *wm8770;
	int ret;

	wm8770 = snd_soc_codec_get_drvdata(codec);
	wm8770->codec = codec;

	ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		return ret;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
				    wm8770->supplies);
	if (ret) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
		return ret;
	}

	ret = wm8770_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
		goto err_reg_enable;
	}

	/* latch the volume update bits */
	snd_soc_update_bits(codec, WM8770_MSDIGVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_MSALGVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_VOUT1RVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_VOUT2RVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_VOUT3RVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_VOUT4RVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_DAC1RVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_DAC2RVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_DAC3RVOL, 0x100, 0x100);
	snd_soc_update_bits(codec, WM8770_DAC4RVOL, 0x100, 0x100);

	/* mute all DACs */
	snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10, 0x10);

err_reg_enable:
	regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
	return ret;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8770 = {
	.probe = wm8770_probe,
	.set_bias_level = wm8770_set_bias_level,
	.idle_bias_off = true,

	.controls = wm8770_snd_controls,
	.num_controls = ARRAY_SIZE(wm8770_snd_controls),
	.dapm_widgets = wm8770_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm8770_dapm_widgets),
	.dapm_routes = wm8770_intercon,
	.num_dapm_routes = ARRAY_SIZE(wm8770_intercon),
};

static const struct of_device_id wm8770_of_match[] = {
	{ .compatible = "wlf,wm8770", },
	{ }
};
MODULE_DEVICE_TABLE(of, wm8770_of_match);

static const struct regmap_config wm8770_regmap = {
	.reg_bits = 7,
	.val_bits = 9,
	.max_register = WM8770_RESET,

	.reg_defaults = wm8770_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(wm8770_reg_defaults),
	.cache_type = REGCACHE_RBTREE,

	.volatile_reg = wm8770_volatile_reg,
};

static int wm8770_spi_probe(struct spi_device *spi)
{
	struct wm8770_priv *wm8770;
	int ret, i;

	wm8770 = devm_kzalloc(&spi->dev, sizeof(struct wm8770_priv),
			      GFP_KERNEL);
	if (!wm8770)
		return -ENOMEM;

	for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
		wm8770->supplies[i].supply = wm8770_supply_names[i];

	ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8770->supplies),
				      wm8770->supplies);
	if (ret) {
		dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
		return ret;
	}

	wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
	wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
	wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;

	/* This should really be moved into the regulator core */
	for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
		ret = regulator_register_notifier(wm8770->supplies[i].consumer,
						  &wm8770->disable_nb[i]);
		if (ret) {
			dev_err(&spi->dev,
				"Failed to register regulator notifier: %d\n",
				ret);
		}
	}

	wm8770->regmap = devm_regmap_init_spi(spi, &wm8770_regmap);
	if (IS_ERR(wm8770->regmap))
		return PTR_ERR(wm8770->regmap);

	spi_set_drvdata(spi, wm8770);

	ret = snd_soc_register_codec(&spi->dev,
				     &soc_codec_dev_wm8770, &wm8770_dai, 1);

	return ret;
}

static int wm8770_spi_remove(struct spi_device *spi)
{
	struct wm8770_priv *wm8770 = spi_get_drvdata(spi);
	int i;

	for (i = 0; i < ARRAY_SIZE(wm8770->supplies); ++i)
		regulator_unregister_notifier(wm8770->supplies[i].consumer,
					      &wm8770->disable_nb[i]);

	snd_soc_unregister_codec(&spi->dev);

	return 0;
}

static struct spi_driver wm8770_spi_driver = {
	.driver = {
		.name = "wm8770",
		.owner = THIS_MODULE,
		.of_match_table = wm8770_of_match,
	},
	.probe = wm8770_spi_probe,
	.remove = wm8770_spi_remove
};

module_spi_driver(wm8770_spi_driver);

MODULE_DESCRIPTION("ASoC WM8770 driver");
MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");