summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/wm8737.c
blob: ff95e62c56b9a7ae211c3f2d508d9cff94132931 (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
/*
 * wm8737.c  --  WM8737 ALSA SoC Audio driver
 *
 * Copyright 2010 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@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/pm.h>
#include <linux/i2c.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/of_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8737.h"

#define WM8737_NUM_SUPPLIES 4
static const char *wm8737_supply_names[WM8737_NUM_SUPPLIES] = {
	"DCVDD",
	"DBVDD",
	"AVDD",
	"MVDD",
};

/* codec private data */
struct wm8737_priv {
	enum snd_soc_control_type control_type;
	struct regulator_bulk_data supplies[WM8737_NUM_SUPPLIES];
	unsigned int mclk;
};

static const u16 wm8737_reg[WM8737_REGISTER_COUNT] = {
	0x00C3,     /* R0  - Left PGA volume */
	0x00C3,     /* R1  - Right PGA volume */
	0x0007,     /* R2  - AUDIO path L */
	0x0007,     /* R3  - AUDIO path R */
	0x0000,     /* R4  - 3D Enhance */
	0x0000,     /* R5  - ADC Control */
	0x0000,     /* R6  - Power Management */
	0x000A,     /* R7  - Audio Format */
	0x0000,     /* R8  - Clocking */
	0x000F,     /* R9  - MIC Preamp Control */
	0x0003,     /* R10 - Misc Bias Control */
	0x0000,     /* R11 - Noise Gate */
	0x007C,     /* R12 - ALC1 */
	0x0000,     /* R13 - ALC2 */
	0x0032,     /* R14 - ALC3 */
};

static int wm8737_reset(struct snd_soc_codec *codec)
{
	return snd_soc_write(codec, WM8737_RESET, 0);
}

static const unsigned int micboost_tlv[] = {
	TLV_DB_RANGE_HEAD(4),
	0, 0, TLV_DB_SCALE_ITEM(1300, 0, 0),
	1, 1, TLV_DB_SCALE_ITEM(1800, 0, 0),
	2, 2, TLV_DB_SCALE_ITEM(2800, 0, 0),
	3, 3, TLV_DB_SCALE_ITEM(3300, 0, 0),
};
static const DECLARE_TLV_DB_SCALE(pga_tlv, -9750, 50, 1);
static const DECLARE_TLV_DB_SCALE(adc_tlv, -600, 600, 0);
static const DECLARE_TLV_DB_SCALE(ng_tlv, -7800, 600, 0);
static const DECLARE_TLV_DB_SCALE(alc_max_tlv, -1200, 600, 0);
static const DECLARE_TLV_DB_SCALE(alc_target_tlv, -1800, 100, 0);

static const char *micbias_enum_text[] = {
	"25%",
	"50%",
	"75%",
	"100%",
};

static const struct soc_enum micbias_enum =
	SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 0, 4, micbias_enum_text);

static const char *low_cutoff_text[] = {
	"Low", "High"
};

static const struct soc_enum low_3d =
	SOC_ENUM_SINGLE(WM8737_3D_ENHANCE, 6, 2, low_cutoff_text);

static const char *high_cutoff_text[] = {
	"High", "Low"
};

static const struct soc_enum high_3d =
	SOC_ENUM_SINGLE(WM8737_3D_ENHANCE, 5, 2, high_cutoff_text);

static const char *alc_fn_text[] = {
	"Disabled", "Right", "Left", "Stereo"
};

static const struct soc_enum alc_fn =
	SOC_ENUM_SINGLE(WM8737_ALC1, 7, 4, alc_fn_text);

static const char *alc_hold_text[] = {
	"0", "2.67ms", "5.33ms", "10.66ms", "21.32ms", "42.64ms", "85.28ms",
	"170.56ms", "341.12ms", "682.24ms", "1.364s", "2.728s", "5.458s",
	"10.916s", "21.832s", "43.691s"
};

static const struct soc_enum alc_hold =
	SOC_ENUM_SINGLE(WM8737_ALC2, 0, 16, alc_hold_text);

static const char *alc_atk_text[] = {
	"8.4ms", "16.8ms", "33.6ms", "67.2ms", "134.4ms", "268.8ms", "537.6ms",
	"1.075s", "2.15s", "4.3s", "8.6s"
};

static const struct soc_enum alc_atk =
	SOC_ENUM_SINGLE(WM8737_ALC3, 0, 11, alc_atk_text);

static const char *alc_dcy_text[] = {
	"33.6ms", "67.2ms", "134.4ms", "268.8ms", "537.6ms", "1.075s", "2.15s",
	"4.3s", "8.6s", "17.2s", "34.41s"
};

static const struct soc_enum alc_dcy =
	SOC_ENUM_SINGLE(WM8737_ALC3, 4, 11, alc_dcy_text);

static const struct snd_kcontrol_new wm8737_snd_controls[] = {
SOC_DOUBLE_R_TLV("Mic Boost Volume", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
		 6, 3, 0, micboost_tlv),
SOC_DOUBLE_R("Mic Boost Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
	     4, 1, 0),
SOC_DOUBLE("Mic ZC Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
	   3, 1, 0),

SOC_DOUBLE_R_TLV("Capture Volume", WM8737_LEFT_PGA_VOLUME,
		 WM8737_RIGHT_PGA_VOLUME, 0, 255, 0, pga_tlv),
SOC_DOUBLE("Capture ZC Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
	   2, 1, 0),

SOC_DOUBLE("INPUT1 DC Bias Switch", WM8737_MISC_BIAS_CONTROL, 0, 1, 1, 0),

SOC_ENUM("Mic PGA Bias", micbias_enum),
SOC_SINGLE("ADC Low Power Switch", WM8737_ADC_CONTROL, 2, 1, 0),
SOC_SINGLE("High Pass Filter Switch", WM8737_ADC_CONTROL, 0, 1, 1),
SOC_DOUBLE("Polarity Invert Switch", WM8737_ADC_CONTROL, 5, 6, 1, 0),

SOC_SINGLE("3D Switch", WM8737_3D_ENHANCE, 0, 1, 0),
SOC_SINGLE("3D Depth", WM8737_3D_ENHANCE, 1, 15, 0),
SOC_ENUM("3D Low Cut-off", low_3d),
SOC_ENUM("3D High Cut-off", low_3d),
SOC_SINGLE_TLV("3D ADC Volume", WM8737_3D_ENHANCE, 7, 1, 1, adc_tlv),

SOC_SINGLE("Noise Gate Switch", WM8737_NOISE_GATE, 0, 1, 0),
SOC_SINGLE_TLV("Noise Gate Threshold Volume", WM8737_NOISE_GATE, 2, 7, 0,
	       ng_tlv),

SOC_ENUM("ALC", alc_fn),
SOC_SINGLE_TLV("ALC Max Gain Volume", WM8737_ALC1, 4, 7, 0, alc_max_tlv),
SOC_SINGLE_TLV("ALC Target Volume", WM8737_ALC1, 0, 15, 0, alc_target_tlv),
SOC_ENUM("ALC Hold Time", alc_hold),
SOC_SINGLE("ALC ZC Switch", WM8737_ALC2, 4, 1, 0),
SOC_ENUM("ALC Attack Time", alc_atk),
SOC_ENUM("ALC Decay Time", alc_dcy),
};

static const char *linsel_text[] = {
	"LINPUT1", "LINPUT2", "LINPUT3", "LINPUT1 DC",
};

static const struct soc_enum linsel_enum =
	SOC_ENUM_SINGLE(WM8737_AUDIO_PATH_L, 7, 4, linsel_text);

static const struct snd_kcontrol_new linsel_mux =
	SOC_DAPM_ENUM("LINSEL", linsel_enum);


static const char *rinsel_text[] = {
	"RINPUT1", "RINPUT2", "RINPUT3", "RINPUT1 DC",
};

static const struct soc_enum rinsel_enum =
	SOC_ENUM_SINGLE(WM8737_AUDIO_PATH_R, 7, 4, rinsel_text);

static const struct snd_kcontrol_new rinsel_mux =
	SOC_DAPM_ENUM("RINSEL", rinsel_enum);

static const char *bypass_text[] = {
	"Direct", "Preamp"
};

static const struct soc_enum lbypass_enum =
	SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 2, 2, bypass_text);

static const struct snd_kcontrol_new lbypass_mux =
	SOC_DAPM_ENUM("Left Bypass", lbypass_enum);


static const struct soc_enum rbypass_enum =
	SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 3, 2, bypass_text);

static const struct snd_kcontrol_new rbypass_mux =
	SOC_DAPM_ENUM("Left Bypass", rbypass_enum);

static const struct snd_soc_dapm_widget wm8737_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("LINPUT1"),
SND_SOC_DAPM_INPUT("LINPUT2"),
SND_SOC_DAPM_INPUT("LINPUT3"),
SND_SOC_DAPM_INPUT("RINPUT1"),
SND_SOC_DAPM_INPUT("RINPUT2"),
SND_SOC_DAPM_INPUT("RINPUT3"),
SND_SOC_DAPM_INPUT("LACIN"),
SND_SOC_DAPM_INPUT("RACIN"),

SND_SOC_DAPM_MUX("LINSEL", SND_SOC_NOPM, 0, 0, &linsel_mux),
SND_SOC_DAPM_MUX("RINSEL", SND_SOC_NOPM, 0, 0, &rinsel_mux),

SND_SOC_DAPM_MUX("Left Preamp Mux", SND_SOC_NOPM, 0, 0, &lbypass_mux),
SND_SOC_DAPM_MUX("Right Preamp Mux", SND_SOC_NOPM, 0, 0, &rbypass_mux),

SND_SOC_DAPM_PGA("PGAL", WM8737_POWER_MANAGEMENT, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("PGAR", WM8737_POWER_MANAGEMENT, 4, 0, NULL, 0),

SND_SOC_DAPM_DAC("ADCL", NULL, WM8737_POWER_MANAGEMENT, 3, 0),
SND_SOC_DAPM_DAC("ADCR", NULL, WM8737_POWER_MANAGEMENT, 2, 0),

SND_SOC_DAPM_AIF_OUT("AIF", "Capture", 0, WM8737_POWER_MANAGEMENT, 6, 0),
};

static const struct snd_soc_dapm_route intercon[] = {
	{ "LINSEL", "LINPUT1", "LINPUT1" },
	{ "LINSEL", "LINPUT2", "LINPUT2" },
	{ "LINSEL", "LINPUT3", "LINPUT3" },
	{ "LINSEL", "LINPUT1 DC", "LINPUT1" },

	{ "RINSEL", "RINPUT1", "RINPUT1" },
	{ "RINSEL", "RINPUT2", "RINPUT2" },
	{ "RINSEL", "RINPUT3", "RINPUT3" },
	{ "RINSEL", "RINPUT1 DC", "RINPUT1" },

	{ "Left Preamp Mux", "Preamp", "LINSEL" },
	{ "Left Preamp Mux", "Direct", "LACIN" },

	{ "Right Preamp Mux", "Preamp", "RINSEL" },
	{ "Right Preamp Mux", "Direct", "RACIN" },

	{ "PGAL", NULL, "Left Preamp Mux" },
	{ "PGAR", NULL, "Right Preamp Mux" },

	{ "ADCL", NULL, "PGAL" },
	{ "ADCR", NULL, "PGAR" },

	{ "AIF", NULL, "ADCL" },
	{ "AIF", NULL, "ADCR" },
};

static int wm8737_add_widgets(struct snd_soc_codec *codec)
{
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	snd_soc_dapm_new_controls(dapm, wm8737_dapm_widgets,
				  ARRAY_SIZE(wm8737_dapm_widgets));
	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));

	return 0;
}

/* codec mclk clock divider coefficients */
static const struct {
	u32 mclk;
	u32 rate;
	u8 usb;
	u8 sr;
} coeff_div[] = {
	{ 12288000,  8000, 0,  0x4 },
	{ 12288000, 12000, 0,  0x8 },
	{ 12288000, 16000, 0,  0xa },
	{ 12288000, 24000, 0, 0x1c },
	{ 12288000, 32000, 0,  0xc },
	{ 12288000, 48000, 0,    0 },
	{ 12288000, 96000, 0,  0xe },

	{ 11289600,  8000, 0, 0x14 },
	{ 11289600, 11025, 0, 0x18 },
	{ 11289600, 22050, 0, 0x1a },
	{ 11289600, 44100, 0, 0x10 },
	{ 11289600, 88200, 0, 0x1e },

	{ 18432000,  8000, 0,  0x5 },
	{ 18432000, 12000, 0,  0x9 },
	{ 18432000, 16000, 0,  0xb },
	{ 18432000, 24000, 0, 0x1b },
	{ 18432000, 32000, 0,  0xd },
	{ 18432000, 48000, 0,  0x1 },
	{ 18432000, 96000, 0, 0x1f },

	{ 16934400,  8000, 0, 0x15 },
	{ 16934400, 11025, 0, 0x19 },
	{ 16934400, 22050, 0, 0x1b },
	{ 16934400, 44100, 0, 0x11 },
	{ 16934400, 88200, 0, 0x1f },

	{ 12000000,  8000, 1,  0x4 },
	{ 12000000, 11025, 1, 0x19 },
	{ 12000000, 12000, 1,  0x8 },
	{ 12000000, 16000, 1,  0xa },
	{ 12000000, 22050, 1, 0x1b },
	{ 12000000, 24000, 1, 0x1c },
	{ 12000000, 32000, 1,  0xc },
	{ 12000000, 44100, 1, 0x11 },
	{ 12000000, 48000, 1,  0x0 },
	{ 12000000, 88200, 1, 0x1f },
	{ 12000000, 96000, 1,  0xe },
};

static int wm8737_hw_params(struct snd_pcm_substream *substream,
			    struct snd_pcm_hw_params *params,
			    struct snd_soc_dai *dai)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_codec *codec = rtd->codec;
	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
	int i;
	u16 clocking = 0;
	u16 af = 0;

	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
		if (coeff_div[i].rate != params_rate(params))
			continue;

		if (coeff_div[i].mclk == wm8737->mclk)
			break;

		if (coeff_div[i].mclk == wm8737->mclk * 2) {
			clocking |= WM8737_CLKDIV2;
			break;
		}
	}

	if (i == ARRAY_SIZE(coeff_div)) {
		dev_err(codec->dev, "%dHz MCLK can't support %dHz\n",
			wm8737->mclk, params_rate(params));
		return -EINVAL;
	}

	clocking |= coeff_div[i].usb | (coeff_div[i].sr << WM8737_SR_SHIFT);

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		af |= 0x8;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		af |= 0x10;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		af |= 0x18;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT, WM8737_WL_MASK, af);
	snd_soc_update_bits(codec, WM8737_CLOCKING,
			    WM8737_USB_MODE | WM8737_CLKDIV2 | WM8737_SR_MASK,
			    clocking);

	return 0;
}

static int wm8737_set_dai_sysclk(struct snd_soc_dai *codec_dai,
				 int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
	int i;

	for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
		if (freq == coeff_div[i].mclk ||
		    freq == coeff_div[i].mclk * 2) {
			wm8737->mclk = freq;
			return 0;
		}
	}

	dev_err(codec->dev, "MCLK rate %dHz not supported\n", freq);

	return -EINVAL;
}


static int wm8737_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 af = 0;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		af |= WM8737_MS;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		af |= 0x2;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		af |= 0x1;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		af |= 0x3;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		af |= 0x13;
		break;
	default:
		return -EINVAL;
	}

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_NB_IF:
		af |= WM8737_LRP;
		break;
	default:
		return -EINVAL;
	}

	snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT,
			    WM8737_FORMAT_MASK | WM8737_LRP | WM8737_MS, af);

	return 0;
}

static int wm8737_set_bias_level(struct snd_soc_codec *codec,
				 enum snd_soc_bias_level level)
{
	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
	int ret;

	switch (level) {
	case SND_SOC_BIAS_ON:
		break;

	case SND_SOC_BIAS_PREPARE:
		/* VMID at 2*75k */
		snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
				    WM8737_VMIDSEL_MASK, 0);
		break;

	case SND_SOC_BIAS_STANDBY:
		if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
			ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
						    wm8737->supplies);
			if (ret != 0) {
				dev_err(codec->dev,
					"Failed to enable supplies: %d\n",
					ret);
				return ret;
			}

			snd_soc_cache_sync(codec);

			/* Fast VMID ramp at 2*2.5k */
			snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
					    WM8737_VMIDSEL_MASK, 0x4);

			/* Bring VMID up */
			snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
					    WM8737_VMID_MASK |
					    WM8737_VREF_MASK,
					    WM8737_VMID_MASK |
					    WM8737_VREF_MASK);

			msleep(500);
		}

		/* VMID at 2*300k */
		snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
				    WM8737_VMIDSEL_MASK, 2);

		break;

	case SND_SOC_BIAS_OFF:
		snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
				    WM8737_VMID_MASK | WM8737_VREF_MASK, 0);

		regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies),
				       wm8737->supplies);
		break;
	}

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

#define WM8737_RATES SNDRV_PCM_RATE_8000_96000

#define WM8737_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 wm8737_dai_ops = {
	.hw_params	= wm8737_hw_params,
	.set_sysclk	= wm8737_set_dai_sysclk,
	.set_fmt	= wm8737_set_dai_fmt,
};

static struct snd_soc_dai_driver wm8737_dai = {
	.name = "wm8737",
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,  /* Mono modes not yet supported */
		.channels_max = 2,
		.rates = WM8737_RATES,
		.formats = WM8737_FORMATS,
	},
	.ops = &wm8737_dai_ops,
};

#ifdef CONFIG_PM
static int wm8737_suspend(struct snd_soc_codec *codec)
{
	wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static int wm8737_resume(struct snd_soc_codec *codec)
{
	wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	return 0;
}
#else
#define wm8737_suspend NULL
#define wm8737_resume NULL
#endif

static int wm8737_probe(struct snd_soc_codec *codec)
{
	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
	int ret, i;

	ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8737->control_type);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
		return ret;
	}

	for (i = 0; i < ARRAY_SIZE(wm8737->supplies); i++)
		wm8737->supplies[i].supply = wm8737_supply_names[i];

	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8737->supplies),
				 wm8737->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
		return ret;
	}

	ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
				    wm8737->supplies);
	if (ret != 0) {
		dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
		goto err_get;
	}

	ret = wm8737_reset(codec);
	if (ret < 0) {
		dev_err(codec->dev, "Failed to issue reset\n");
		goto err_enable;
	}

	snd_soc_update_bits(codec, WM8737_LEFT_PGA_VOLUME, WM8737_LVU,
			    WM8737_LVU);
	snd_soc_update_bits(codec, WM8737_RIGHT_PGA_VOLUME, WM8737_RVU,
			    WM8737_RVU);

	wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	/* Bias level configuration will have done an extra enable */
	regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);

	snd_soc_add_controls(codec, wm8737_snd_controls,
			     ARRAY_SIZE(wm8737_snd_controls));
	wm8737_add_widgets(codec);

	return 0;

err_enable:
	regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
err_get:
	regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);

	return ret;
}

static int wm8737_remove(struct snd_soc_codec *codec)
{
	struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);

	wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
	regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
	return 0;
}

static struct snd_soc_codec_driver soc_codec_dev_wm8737 = {
	.probe		= wm8737_probe,
	.remove		= wm8737_remove,
	.suspend	= wm8737_suspend,
	.resume		= wm8737_resume,
	.set_bias_level = wm8737_set_bias_level,

	.reg_cache_size = WM8737_REGISTER_COUNT - 1, /* Skip reset */
	.reg_word_size	= sizeof(u16),
	.reg_cache_default = wm8737_reg,
};

static const struct of_device_id wm8737_of_match[] = {
	{ .compatible = "wlf,wm8737", },
	{ }
};

MODULE_DEVICE_TABLE(of, wm8737_of_match);

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8737_i2c_probe(struct i2c_client *i2c,
				      const struct i2c_device_id *id)
{
	struct wm8737_priv *wm8737;
	int ret;

	wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
	if (wm8737 == NULL)
		return -ENOMEM;

	i2c_set_clientdata(i2c, wm8737);
	wm8737->control_type = SND_SOC_I2C;

	ret =  snd_soc_register_codec(&i2c->dev,
				      &soc_codec_dev_wm8737, &wm8737_dai, 1);
	if (ret < 0)
		kfree(wm8737);
	return ret;

}

static __devexit int wm8737_i2c_remove(struct i2c_client *client)
{
	snd_soc_unregister_codec(&client->dev);
	kfree(i2c_get_clientdata(client));
	return 0;
}

static const struct i2c_device_id wm8737_i2c_id[] = {
	{ "wm8737", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8737_i2c_id);

static struct i2c_driver wm8737_i2c_driver = {
	.driver = {
		.name = "wm8737",
		.owner = THIS_MODULE,
		.of_match_table = wm8737_of_match,
	},
	.probe =    wm8737_i2c_probe,
	.remove =   __devexit_p(wm8737_i2c_remove),
	.id_table = wm8737_i2c_id,
};
#endif

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8737_spi_probe(struct spi_device *spi)
{
	struct wm8737_priv *wm8737;
	int ret;

	wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
	if (wm8737 == NULL)
		return -ENOMEM;

	wm8737->control_type = SND_SOC_SPI;
	spi_set_drvdata(spi, wm8737);

	ret = snd_soc_register_codec(&spi->dev,
				     &soc_codec_dev_wm8737, &wm8737_dai, 1);
	if (ret < 0)
		kfree(wm8737);
	return ret;
}

static int __devexit wm8737_spi_remove(struct spi_device *spi)
{
	snd_soc_unregister_codec(&spi->dev);
	kfree(spi_get_drvdata(spi));
	return 0;
}

static struct spi_driver wm8737_spi_driver = {
	.driver = {
		.name	= "wm8737",
		.owner	= THIS_MODULE,
		.of_match_table = wm8737_of_match,
	},
	.probe		= wm8737_spi_probe,
	.remove		= __devexit_p(wm8737_spi_remove),
};
#endif /* CONFIG_SPI_MASTER */

static int __init wm8737_modinit(void)
{
	int ret;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	ret = i2c_add_driver(&wm8737_i2c_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register WM8737 I2C driver: %d\n",
		       ret);
	}
#endif
#if defined(CONFIG_SPI_MASTER)
	ret = spi_register_driver(&wm8737_spi_driver);
	if (ret != 0) {
		printk(KERN_ERR "Failed to register WM8737 SPI driver: %d\n",
		       ret);
	}
#endif
	return 0;
}
module_init(wm8737_modinit);

static void __exit wm8737_exit(void)
{
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8737_spi_driver);
#endif
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_del_driver(&wm8737_i2c_driver);
#endif
}
module_exit(wm8737_exit);

MODULE_DESCRIPTION("ASoC WM8737 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
OpenPOWER on IntegriCloud