aboutsummaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/wm8510.c
blob: f01078cfbd72e9ff71a4041bd3f42f104af6cef2 (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
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
/*
 * wm8510.c  --  WM8510 ALSA Soc Audio driver
 *
 * Copyright 2006 Wolfson Microelectronics PLC.
 *
 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
 *
 * 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/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.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 "wm8510.h"

#define WM8510_VERSION "0.6"

struct snd_soc_codec_device soc_codec_dev_wm8510;

/*
 * wm8510 register cache
 * We can't read the WM8510 register space when we are
 * using 2 wire for device control, so we cache them instead.
 */
static const u16 wm8510_reg[WM8510_CACHEREGNUM] = {
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0050, 0x0000, 0x0140, 0x0000,
	0x0000, 0x0000, 0x0000, 0x00ff,
	0x0000, 0x0000, 0x0100, 0x00ff,
	0x0000, 0x0000, 0x012c, 0x002c,
	0x002c, 0x002c, 0x002c, 0x0000,
	0x0032, 0x0000, 0x0000, 0x0000,
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0038, 0x000b, 0x0032, 0x0000,
	0x0008, 0x000c, 0x0093, 0x00e9,
	0x0000, 0x0000, 0x0000, 0x0000,
	0x0003, 0x0010, 0x0000, 0x0000,
	0x0000, 0x0002, 0x0001, 0x0000,
	0x0000, 0x0000, 0x0039, 0x0000,
	0x0001,
};

#define WM8510_POWER1_BIASEN  0x08
#define WM8510_POWER1_BUFIOEN 0x10

/*
 * read wm8510 register cache
 */
static inline unsigned int wm8510_read_reg_cache(struct snd_soc_codec *codec,
	unsigned int reg)
{
	u16 *cache = codec->reg_cache;
	if (reg == WM8510_RESET)
		return 0;
	if (reg >= WM8510_CACHEREGNUM)
		return -1;
	return cache[reg];
}

/*
 * write wm8510 register cache
 */
static inline void wm8510_write_reg_cache(struct snd_soc_codec *codec,
	u16 reg, unsigned int value)
{
	u16 *cache = codec->reg_cache;
	if (reg >= WM8510_CACHEREGNUM)
		return;
	cache[reg] = value;
}

/*
 * write to the WM8510 register space
 */
static int wm8510_write(struct snd_soc_codec *codec, unsigned int reg,
	unsigned int value)
{
	u8 data[2];

	/* data is
	 *   D15..D9 WM8510 register offset
	 *   D8...D0 register data
	 */
	data[0] = (reg << 1) | ((value >> 8) & 0x0001);
	data[1] = value & 0x00ff;

	wm8510_write_reg_cache(codec, reg, value);
	if (codec->hw_write(codec->control_data, data, 2) == 2)
		return 0;
	else
		return -EIO;
}

#define wm8510_reset(c)	wm8510_write(c, WM8510_RESET, 0)

static const char *wm8510_companding[] = { "Off", "NC", "u-law", "A-law" };
static const char *wm8510_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
static const char *wm8510_alc[] = { "ALC", "Limiter" };

static const struct soc_enum wm8510_enum[] = {
	SOC_ENUM_SINGLE(WM8510_COMP, 1, 4, wm8510_companding), /* adc */
	SOC_ENUM_SINGLE(WM8510_COMP, 3, 4, wm8510_companding), /* dac */
	SOC_ENUM_SINGLE(WM8510_DAC,  4, 4, wm8510_deemp),
	SOC_ENUM_SINGLE(WM8510_ALC3,  8, 2, wm8510_alc),
};

static const struct snd_kcontrol_new wm8510_snd_controls[] = {

SOC_SINGLE("Digital Loopback Switch", WM8510_COMP, 0, 1, 0),

SOC_ENUM("DAC Companding", wm8510_enum[1]),
SOC_ENUM("ADC Companding", wm8510_enum[0]),

SOC_ENUM("Playback De-emphasis", wm8510_enum[2]),
SOC_SINGLE("DAC Inversion Switch", WM8510_DAC, 0, 1, 0),

SOC_SINGLE("Master Playback Volume", WM8510_DACVOL, 0, 127, 0),

SOC_SINGLE("High Pass Filter Switch", WM8510_ADC, 8, 1, 0),
SOC_SINGLE("High Pass Cut Off", WM8510_ADC, 4, 7, 0),
SOC_SINGLE("ADC Inversion Switch", WM8510_COMP, 0, 1, 0),

SOC_SINGLE("Capture Volume", WM8510_ADCVOL,  0, 127, 0),

SOC_SINGLE("DAC Playback Limiter Switch", WM8510_DACLIM1,  8, 1, 0),
SOC_SINGLE("DAC Playback Limiter Decay", WM8510_DACLIM1,  4, 15, 0),
SOC_SINGLE("DAC Playback Limiter Attack", WM8510_DACLIM1,  0, 15, 0),

SOC_SINGLE("DAC Playback Limiter Threshold", WM8510_DACLIM2,  4, 7, 0),
SOC_SINGLE("DAC Playback Limiter Boost", WM8510_DACLIM2,  0, 15, 0),

SOC_SINGLE("ALC Enable Switch", WM8510_ALC1,  8, 1, 0),
SOC_SINGLE("ALC Capture Max Gain", WM8510_ALC1,  3, 7, 0),
SOC_SINGLE("ALC Capture Min Gain", WM8510_ALC1,  0, 7, 0),

SOC_SINGLE("ALC Capture ZC Switch", WM8510_ALC2,  8, 1, 0),
SOC_SINGLE("ALC Capture Hold", WM8510_ALC2,  4, 7, 0),
SOC_SINGLE("ALC Capture Target", WM8510_ALC2,  0, 15, 0),

SOC_ENUM("ALC Capture Mode", wm8510_enum[3]),
SOC_SINGLE("ALC Capture Decay", WM8510_ALC3,  4, 15, 0),
SOC_SINGLE("ALC Capture Attack", WM8510_ALC3,  0, 15, 0),

SOC_SINGLE("ALC Capture Noise Gate Switch", WM8510_NGATE,  3, 1, 0),
SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8510_NGATE,  0, 7, 0),

SOC_SINGLE("Capture PGA ZC Switch", WM8510_INPPGA,  7, 1, 0),
SOC_SINGLE("Capture PGA Volume", WM8510_INPPGA,  0, 63, 0),

SOC_SINGLE("Speaker Playback ZC Switch", WM8510_SPKVOL,  7, 1, 0),
SOC_SINGLE("Speaker Playback Switch", WM8510_SPKVOL,  6, 1, 1),
SOC_SINGLE("Speaker Playback Volume", WM8510_SPKVOL,  0, 63, 0),
SOC_SINGLE("Speaker Boost", WM8510_OUTPUT, 2, 1, 0),

SOC_SINGLE("Capture Boost(+20dB)", WM8510_ADCBOOST,  8, 1, 0),
SOC_SINGLE("Mono Playback Switch", WM8510_MONOMIX, 6, 1, 1),
};

/* Speaker Output Mixer */
static const struct snd_kcontrol_new wm8510_speaker_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_SPKMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_SPKMIX, 5, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_SPKMIX, 0, 1, 0),
};

/* Mono Output Mixer */
static const struct snd_kcontrol_new wm8510_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8510_MONOMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8510_MONOMIX, 2, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8510_MONOMIX, 0, 1, 0),
};

static const struct snd_kcontrol_new wm8510_boost_controls[] = {
SOC_DAPM_SINGLE("Mic PGA Switch", WM8510_INPPGA,  6, 1, 1),
SOC_DAPM_SINGLE("Aux Volume", WM8510_ADCBOOST, 0, 7, 0),
SOC_DAPM_SINGLE("Mic Volume", WM8510_ADCBOOST, 4, 7, 0),
};

static const struct snd_kcontrol_new wm8510_micpga_controls[] = {
SOC_DAPM_SINGLE("MICP Switch", WM8510_INPUT, 0, 1, 0),
SOC_DAPM_SINGLE("MICN Switch", WM8510_INPUT, 1, 1, 0),
SOC_DAPM_SINGLE("AUX Switch", WM8510_INPUT, 2, 1, 0),
};

static const struct snd_soc_dapm_widget wm8510_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Speaker Mixer", WM8510_POWER3, 2, 0,
	&wm8510_speaker_mixer_controls[0],
	ARRAY_SIZE(wm8510_speaker_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8510_POWER3, 3, 0,
	&wm8510_mono_mixer_controls[0],
	ARRAY_SIZE(wm8510_mono_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8510_POWER3, 0, 0),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8510_POWER2, 0, 0),
SND_SOC_DAPM_PGA("Aux Input", WM8510_POWER1, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkN Out", WM8510_POWER3, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkP Out", WM8510_POWER3, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", WM8510_POWER3, 7, 0, NULL, 0),

SND_SOC_DAPM_MIXER("Mic PGA", WM8510_POWER2, 2, 0,
		   &wm8510_micpga_controls[0],
		   ARRAY_SIZE(wm8510_micpga_controls)),
SND_SOC_DAPM_MIXER("Boost Mixer", WM8510_POWER2, 4, 0,
	&wm8510_boost_controls[0],
	ARRAY_SIZE(wm8510_boost_controls)),

SND_SOC_DAPM_MICBIAS("Mic Bias", WM8510_POWER1, 4, 0),

SND_SOC_DAPM_INPUT("MICN"),
SND_SOC_DAPM_INPUT("MICP"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_OUTPUT("MONOOUT"),
SND_SOC_DAPM_OUTPUT("SPKOUTP"),
SND_SOC_DAPM_OUTPUT("SPKOUTN"),
};

static const struct snd_soc_dapm_route audio_map[] = {
	/* Mono output mixer */
	{"Mono Mixer", "PCM Playback Switch", "DAC"},
	{"Mono Mixer", "Aux Playback Switch", "Aux Input"},
	{"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},

	/* Speaker output mixer */
	{"Speaker Mixer", "PCM Playback Switch", "DAC"},
	{"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
	{"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},

	/* Outputs */
	{"Mono Out", NULL, "Mono Mixer"},
	{"MONOOUT", NULL, "Mono Out"},
	{"SpkN Out", NULL, "Speaker Mixer"},
	{"SpkP Out", NULL, "Speaker Mixer"},
	{"SPKOUTN", NULL, "SpkN Out"},
	{"SPKOUTP", NULL, "SpkP Out"},

	/* Microphone PGA */
	{"Mic PGA", "MICN Switch", "MICN"},
	{"Mic PGA", "MICP Switch", "MICP"},
	{ "Mic PGA", "AUX Switch", "Aux Input" },

	/* Boost Mixer */
	{"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
	{"Boost Mixer", "Mic Volume", "MICP"},
	{"Boost Mixer", "Aux Volume", "Aux Input"},

	{"ADC", NULL, "Boost Mixer"},
};

static int wm8510_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, wm8510_dapm_widgets,
				  ARRAY_SIZE(wm8510_dapm_widgets));

	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

	snd_soc_dapm_new_widgets(codec);
	return 0;
}

struct pll_ {
	unsigned int pre_div:4; /* prescale - 1 */
	unsigned int n:4;
	unsigned int k;
};

static struct pll_ pll_div;

/* The size in bits of the pll divide multiplied by 10
 * to allow rounding later */
#define FIXED_PLL_SIZE ((1 << 24) * 10)

static void pll_factors(unsigned int target, unsigned int source)
{
	unsigned long long Kpart;
	unsigned int K, Ndiv, Nmod;

	Ndiv = target / source;
	if (Ndiv < 6) {
		source >>= 1;
		pll_div.pre_div = 1;
		Ndiv = target / source;
	} else
		pll_div.pre_div = 0;

	if ((Ndiv < 6) || (Ndiv > 12))
		printk(KERN_WARNING
			"WM8510 N value %d outwith recommended range!d\n",
			Ndiv);

	pll_div.n = Ndiv;
	Nmod = target % source;
	Kpart = FIXED_PLL_SIZE * (long long)Nmod;

	do_div(Kpart, source);

	K = Kpart & 0xFFFFFFFF;

	/* Check if we need to round */
	if ((K % 10) >= 5)
		K += 5;

	/* Move down to proper range now rounding is done */
	K /= 10;

	pll_div.k = K;
}

static int wm8510_set_dai_pll(struct snd_soc_dai *codec_dai,
		int pll_id, unsigned int freq_in, unsigned int freq_out)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 reg;

	if (freq_in == 0 || freq_out == 0) {
		/* Clock CODEC directly from MCLK */
		reg = wm8510_read_reg_cache(codec, WM8510_CLOCK);
		wm8510_write(codec, WM8510_CLOCK, reg & 0x0ff);

		/* Turn off PLL */
		reg = wm8510_read_reg_cache(codec, WM8510_POWER1);
		wm8510_write(codec, WM8510_POWER1, reg & 0x1df);
		return 0;
	}

	pll_factors(freq_out*8, freq_in);

	wm8510_write(codec, WM8510_PLLN, (pll_div.pre_div << 4) | pll_div.n);
	wm8510_write(codec, WM8510_PLLK1, pll_div.k >> 18);
	wm8510_write(codec, WM8510_PLLK2, (pll_div.k >> 9) & 0x1ff);
	wm8510_write(codec, WM8510_PLLK3, pll_div.k & 0x1ff);
	reg = wm8510_read_reg_cache(codec, WM8510_POWER1);
	wm8510_write(codec, WM8510_POWER1, reg | 0x020);

	/* Run CODEC from PLL instead of MCLK */
	reg = wm8510_read_reg_cache(codec, WM8510_CLOCK);
	wm8510_write(codec, WM8510_CLOCK, reg | 0x100);

	return 0;
}

/*
 * Configure WM8510 clock dividers.
 */
static int wm8510_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
		int div_id, int div)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 reg;

	switch (div_id) {
	case WM8510_OPCLKDIV:
		reg = wm8510_read_reg_cache(codec, WM8510_GPIO) & 0x1cf;
		wm8510_write(codec, WM8510_GPIO, reg | div);
		break;
	case WM8510_MCLKDIV:
		reg = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1f;
		wm8510_write(codec, WM8510_CLOCK, reg | div);
		break;
	case WM8510_ADCCLK:
		reg = wm8510_read_reg_cache(codec, WM8510_ADC) & 0x1f7;
		wm8510_write(codec, WM8510_ADC, reg | div);
		break;
	case WM8510_DACCLK:
		reg = wm8510_read_reg_cache(codec, WM8510_DAC) & 0x1f7;
		wm8510_write(codec, WM8510_DAC, reg | div);
		break;
	case WM8510_BCLKDIV:
		reg = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1e3;
		wm8510_write(codec, WM8510_CLOCK, reg | div);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static int wm8510_set_dai_fmt(struct snd_soc_dai *codec_dai,
		unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 iface = 0;
	u16 clk = wm8510_read_reg_cache(codec, WM8510_CLOCK) & 0x1fe;

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		clk |= 0x0001;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		break;
	default:
		return -EINVAL;
	}

	/* interface format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		iface |= 0x0010;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface |= 0x0008;
		break;
	case SND_SOC_DAIFMT_DSP_A:
		iface |= 0x00018;
		break;
	default:
		return -EINVAL;
	}

	/* clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		break;
	case SND_SOC_DAIFMT_IB_IF:
		iface |= 0x0180;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		iface |= 0x0100;
		break;
	case SND_SOC_DAIFMT_NB_IF:
		iface |= 0x0080;
		break;
	default:
		return -EINVAL;
	}

	wm8510_write(codec, WM8510_IFACE, iface);
	wm8510_write(codec, WM8510_CLOCK, clk);
	return 0;
}

static int wm8510_pcm_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_device *socdev = rtd->socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	u16 iface = wm8510_read_reg_cache(codec, WM8510_IFACE) & 0x19f;
	u16 adn = wm8510_read_reg_cache(codec, WM8510_ADD) & 0x1f1;

	/* bit size */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface |= 0x0020;
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface |= 0x0040;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface |= 0x0060;
		break;
	}

	/* filter coefficient */
	switch (params_rate(params)) {
	case SNDRV_PCM_RATE_8000:
		adn |= 0x5 << 1;
		break;
	case SNDRV_PCM_RATE_11025:
		adn |= 0x4 << 1;
		break;
	case SNDRV_PCM_RATE_16000:
		adn |= 0x3 << 1;
		break;
	case SNDRV_PCM_RATE_22050:
		adn |= 0x2 << 1;
		break;
	case SNDRV_PCM_RATE_32000:
		adn |= 0x1 << 1;
		break;
	case SNDRV_PCM_RATE_44100:
	case SNDRV_PCM_RATE_48000:
		break;
	}

	wm8510_write(codec, WM8510_IFACE, iface);
	wm8510_write(codec, WM8510_ADD, adn);
	return 0;
}

static int wm8510_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	u16 mute_reg = wm8510_read_reg_cache(codec, WM8510_DAC) & 0xffbf;

	if (mute)
		wm8510_write(codec, WM8510_DAC, mute_reg | 0x40);
	else
		wm8510_write(codec, WM8510_DAC, mute_reg);
	return 0;
}

/* liam need to make this lower power with dapm */
static int wm8510_set_bias_level(struct snd_soc_codec *codec,
	enum snd_soc_bias_level level)
{
	u16 power1 = wm8510_read_reg_cache(codec, WM8510_POWER1) & ~0x3;

	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
		power1 |= 0x1;  /* VMID 50k */
		wm8510_write(codec, WM8510_POWER1, power1);
		break;

	case SND_SOC_BIAS_STANDBY:
		power1 |= WM8510_POWER1_BIASEN | WM8510_POWER1_BUFIOEN;

		if (codec->bias_level == SND_SOC_BIAS_OFF) {
			/* Initial cap charge at VMID 5k */
			wm8510_write(codec, WM8510_POWER1, power1 | 0x3);
			mdelay(100);
		}

		power1 |= 0x2;  /* VMID 500k */
		wm8510_write(codec, WM8510_POWER1, power1);
		break;

	case SND_SOC_BIAS_OFF:
		wm8510_write(codec, WM8510_POWER1, 0);
		wm8510_write(codec, WM8510_POWER2, 0);
		wm8510_write(codec, WM8510_POWER3, 0);
		break;
	}

	codec->bias_level = level;
	return 0;
}

#define WM8510_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
		SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)

#define WM8510_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

struct snd_soc_dai wm8510_dai = {
	.name = "WM8510 HiFi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = WM8510_RATES,
		.formats = WM8510_FORMATS,},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = WM8510_RATES,
		.formats = WM8510_FORMATS,},
	.ops = {
		.hw_params = wm8510_pcm_hw_params,
		.digital_mute = wm8510_mute,
		.set_fmt = wm8510_set_dai_fmt,
		.set_clkdiv = wm8510_set_dai_clkdiv,
		.set_pll = wm8510_set_dai_pll,
	},
};
EXPORT_SYMBOL_GPL(wm8510_dai);

static int wm8510_suspend(struct platform_device *pdev, pm_message_t state)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF);
	return 0;
}

static int wm8510_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;
	int i;
	u8 data[2];
	u16 *cache = codec->reg_cache;

	/* Sync reg_cache with the hardware */
	for (i = 0; i < ARRAY_SIZE(wm8510_reg); i++) {
		data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
		data[1] = cache[i] & 0x00ff;
		codec->hw_write(codec->control_data, data, 2);
	}
	wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	wm8510_set_bias_level(codec, codec->suspend_bias_level);
	return 0;
}

/*
 * initialise the WM8510 driver
 * register the mixer and dsp interfaces with the kernel
 */
static int wm8510_init(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret = 0;

	codec->name = "WM8510";
	codec->owner = THIS_MODULE;
	codec->read = wm8510_read_reg_cache;
	codec->write = wm8510_write;
	codec->set_bias_level = wm8510_set_bias_level;
	codec->dai = &wm8510_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = ARRAY_SIZE(wm8510_reg);
	codec->reg_cache = kmemdup(wm8510_reg, sizeof(wm8510_reg), GFP_KERNEL);

	if (codec->reg_cache == NULL)
		return -ENOMEM;

	wm8510_reset(codec);

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "wm8510: failed to create pcms\n");
		goto pcm_err;
	}

	/* power on device */
	codec->bias_level = SND_SOC_BIAS_OFF;
	wm8510_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	snd_soc_add_controls(codec, wm8510_snd_controls,
				ARRAY_SIZE(wm8510_snd_controls));
	wm8510_add_widgets(codec);
	ret = snd_soc_init_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "wm8510: failed to register card\n");
		goto card_err;
	}
	return ret;

card_err:
	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
pcm_err:
	kfree(codec->reg_cache);
	return ret;
}

static struct snd_soc_device *wm8510_socdev;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)

/*
 * WM8510 2 wire address is 0x1a
 */

static int wm8510_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct snd_soc_device *socdev = wm8510_socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret;

	i2c_set_clientdata(i2c, codec);
	codec->control_data = i2c;

	ret = wm8510_init(socdev);
	if (ret < 0)
		pr_err("failed to initialise WM8510\n");

	return ret;
}

static int wm8510_i2c_remove(struct i2c_client *client)
{
	struct snd_soc_codec *codec = i2c_get_clientdata(client);
	kfree(codec->reg_cache);
	return 0;
}

static const struct i2c_device_id wm8510_i2c_id[] = {
	{ "wm8510", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm8510_i2c_id);

static struct i2c_driver wm8510_i2c_driver = {
	.driver = {
		.name = "WM8510 I2C Codec",
		.owner = THIS_MODULE,
	},
	.probe =    wm8510_i2c_probe,
	.remove =   wm8510_i2c_remove,
	.id_table = wm8510_i2c_id,
};

static int wm8510_add_i2c_device(struct platform_device *pdev,
				 const struct wm8510_setup_data *setup)
{
	struct i2c_board_info info;
	struct i2c_adapter *adapter;
	struct i2c_client *client;
	int ret;

	ret = i2c_add_driver(&wm8510_i2c_driver);
	if (ret != 0) {
		dev_err(&pdev->dev, "can't add i2c driver\n");
		return ret;
	}

	memset(&info, 0, sizeof(struct i2c_board_info));
	info.addr = setup->i2c_address;
	strlcpy(info.type, "wm8510", I2C_NAME_SIZE);

	adapter = i2c_get_adapter(setup->i2c_bus);
	if (!adapter) {
		dev_err(&pdev->dev, "can't get i2c adapter %d\n",
			setup->i2c_bus);
		goto err_driver;
	}

	client = i2c_new_device(adapter, &info);
	i2c_put_adapter(adapter);
	if (!client) {
		dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
			(unsigned int)info.addr);
		goto err_driver;
	}

	return 0;

err_driver:
	i2c_del_driver(&wm8510_i2c_driver);
	return -ENODEV;
}
#endif

#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8510_spi_probe(struct spi_device *spi)
{
	struct snd_soc_device *socdev = wm8510_socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret;

	codec->control_data = spi;

	ret = wm8510_init(socdev);
	if (ret < 0)
		dev_err(&spi->dev, "failed to initialise WM8510\n");

	return ret;
}

static int __devexit wm8510_spi_remove(struct spi_device *spi)
{
	return 0;
}

static struct spi_driver wm8510_spi_driver = {
	.driver = {
		.name	= "wm8510",
		.bus	= &spi_bus_type,
		.owner	= THIS_MODULE,
	},
	.probe		= wm8510_spi_probe,
	.remove		= __devexit_p(wm8510_spi_remove),
};

static int wm8510_spi_write(struct spi_device *spi, const char *data, int len)
{
	struct spi_transfer t;
	struct spi_message m;
	u8 msg[2];

	if (len <= 0)
		return 0;

	msg[0] = data[0];
	msg[1] = data[1];

	spi_message_init(&m);
	memset(&t, 0, (sizeof t));

	t.tx_buf = &msg[0];
	t.len = len;

	spi_message_add_tail(&t, &m);
	spi_sync(spi, &m);

	return len;
}
#endif /* CONFIG_SPI_MASTER */

static int wm8510_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct wm8510_setup_data *setup;
	struct snd_soc_codec *codec;
	int ret = 0;

	pr_info("WM8510 Audio Codec %s", WM8510_VERSION);

	setup = socdev->codec_data;
	codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
	if (codec == NULL)
		return -ENOMEM;

	socdev->card->codec = codec;
	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	wm8510_socdev = socdev;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	if (setup->i2c_address) {
		codec->hw_write = (hw_write_t)i2c_master_send;
		ret = wm8510_add_i2c_device(pdev, setup);
	}
#endif
#if defined(CONFIG_SPI_MASTER)
	if (setup->spi) {
		codec->hw_write = (hw_write_t)wm8510_spi_write;
		ret = spi_register_driver(&wm8510_spi_driver);
		if (ret != 0)
			printk(KERN_ERR "can't add spi driver");
	}
#endif

	if (ret != 0)
		kfree(codec);
	return ret;
}

/* power down chip */
static int wm8510_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;

	if (codec->control_data)
		wm8510_set_bias_level(codec, SND_SOC_BIAS_OFF);

	snd_soc_free_pcms(socdev);
	snd_soc_dapm_free(socdev);
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	i2c_unregister_device(codec->control_data);
	i2c_del_driver(&wm8510_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
	spi_unregister_driver(&wm8510_spi_driver);
#endif
	kfree(codec);

	return 0;
}

struct snd_soc_codec_device soc_codec_dev_wm8510 = {
	.probe = 	wm8510_probe,
	.remove = 	wm8510_remove,
	.suspend = 	wm8510_suspend,
	.resume =	wm8510_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8510);

static int __init wm8510_modinit(void)
{
	return snd_soc_register_dai(&wm8510_dai);
}
module_init(wm8510_modinit);

static void __exit wm8510_exit(void)
{
	snd_soc_unregister_dai(&wm8510_dai);
}
module_exit(wm8510_exit);

MODULE_DESCRIPTION("ASoC WM8510 driver");
MODULE_AUTHOR("Liam Girdwood");
MODULE_LICENSE("GPL");