aboutsummaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/tlv320aic23.c
blob: c3f4afb5d0173a581d0bcb18e8670d88c2d4d498 (plain) (blame)
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
/*
 * ALSA SoC TLV320AIC23 codec driver
 *
 * Author:      Arun KS, <arunks@mistralsolutions.com>
 * Copyright:   (C) 2008 Mistral Solutions Pvt Ltd.,
 *
 * Based on sound/soc/codecs/wm8731.c by Richard Purdie
 *
 * 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.
 *
 * Notes:
 *  The AIC23 is a driver for a low power stereo audio
 *  codec tlv320aic23
 *
 *  The machine layer should disable unsupported inputs/outputs by
 *  snd_soc_dapm_disable_pin(codec, "LHPOUT"), etc.
 */

#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/platform_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/tlv.h>
#include <sound/initval.h>

#include "tlv320aic23.h"

#define AIC23_VERSION "0.1"

/*
 * AIC23 register cache
 */
static const u16 tlv320aic23_reg[] = {
	0x0097, 0x0097, 0x00F9, 0x00F9,	/* 0 */
	0x001A, 0x0004, 0x0007, 0x0001,	/* 4 */
	0x0020, 0x0000, 0x0000, 0x0000,	/* 8 */
	0x0000, 0x0000, 0x0000, 0x0000,	/* 12 */
};

/*
 * read tlv320aic23 register cache
 */
static inline unsigned int tlv320aic23_read_reg_cache(struct snd_soc_codec
						      *codec, unsigned int reg)
{
	u16 *cache = codec->reg_cache;
	if (reg >= ARRAY_SIZE(tlv320aic23_reg))
		return -1;
	return cache[reg];
}

/*
 * write tlv320aic23 register cache
 */
static inline void tlv320aic23_write_reg_cache(struct snd_soc_codec *codec,
					       u8 reg, u16 value)
{
	u16 *cache = codec->reg_cache;
	if (reg >= ARRAY_SIZE(tlv320aic23_reg))
		return;
	cache[reg] = value;
}

/*
 * write to the tlv320aic23 register space
 */
static int tlv320aic23_write(struct snd_soc_codec *codec, unsigned int reg,
			     unsigned int value)
{

	u8 data[2];

	/* TLV320AIC23 has 7 bit address and 9 bits of data
	 * so we need to switch one data bit into reg and rest
	 * of data into val
	 */

	if ((reg < 0 || reg > 9) && (reg != 15)) {
		printk(KERN_WARNING "%s Invalid register R%d\n", __func__, reg);
		return -1;
	}

	data[0] = (reg << 1) | (value >> 8 & 0x01);
	data[1] = value & 0xff;

	tlv320aic23_write_reg_cache(codec, reg, value);

	if (codec->hw_write(codec->control_data, data, 2) == 2)
		return 0;

	printk(KERN_ERR "%s cannot write %03x to register R%d\n", __func__,
	       value, reg);

	return -EIO;
}

static const char *rec_src_text[] = { "Line", "Mic" };
static const char *deemph_text[] = {"None", "32Khz", "44.1Khz", "48Khz"};

static const struct soc_enum rec_src_enum =
	SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);

static const struct snd_kcontrol_new tlv320aic23_rec_src_mux_controls =
SOC_DAPM_ENUM("Input Select", rec_src_enum);

static const struct soc_enum tlv320aic23_rec_src =
	SOC_ENUM_SINGLE(TLV320AIC23_ANLG, 2, 2, rec_src_text);
static const struct soc_enum tlv320aic23_deemph =
	SOC_ENUM_SINGLE(TLV320AIC23_DIGT, 1, 4, deemph_text);

static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -12100, 100, 0);
static const DECLARE_TLV_DB_SCALE(input_gain_tlv, -1725, 75, 0);
static const DECLARE_TLV_DB_SCALE(sidetone_vol_tlv, -1800, 300, 0);

static int snd_soc_tlv320aic23_put_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	u16 val, reg;

	val = (ucontrol->value.integer.value[0] & 0x07);

	/* linear conversion to userspace
	* 000	=	-6db
	* 001	=	-9db
	* 010	=	-12db
	* 011	=	-18db (Min)
	* 100	=	0db (Max)
	*/
	val = (val >= 4) ? 4  : (3 - val);

	reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG) & (~0x1C0);
	tlv320aic23_write(codec, TLV320AIC23_ANLG, reg | (val << 6));

	return 0;
}

static int snd_soc_tlv320aic23_get_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	u16 val;

	val = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG) & (0x1C0);
	val = val >> 6;
	val = (val >= 4) ? 4  : (3 -  val);
	ucontrol->value.integer.value[0] = val;
	return 0;

}

#define SOC_TLV320AIC23_SINGLE_TLV(xname, reg, shift, max, invert, tlv_array) \
{	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
	.access = SNDRV_CTL_ELEM_ACCESS_TLV_READ |\
		 SNDRV_CTL_ELEM_ACCESS_READWRITE,\
	.tlv.p = (tlv_array), \
	.info = snd_soc_info_volsw, .get = snd_soc_tlv320aic23_get_volsw,\
	.put = snd_soc_tlv320aic23_put_volsw, \
	.private_value =  SOC_SINGLE_VALUE(reg, shift, max, invert) }

static const struct snd_kcontrol_new tlv320aic23_snd_controls[] = {
	SOC_DOUBLE_R_TLV("Digital Playback Volume", TLV320AIC23_LCHNVOL,
			 TLV320AIC23_RCHNVOL, 0, 127, 0, out_gain_tlv),
	SOC_SINGLE("Digital Playback Switch", TLV320AIC23_DIGT, 3, 1, 1),
	SOC_DOUBLE_R("Line Input Switch", TLV320AIC23_LINVOL,
		     TLV320AIC23_RINVOL, 7, 1, 0),
	SOC_DOUBLE_R_TLV("Line Input Volume", TLV320AIC23_LINVOL,
			 TLV320AIC23_RINVOL, 0, 31, 0, input_gain_tlv),
	SOC_SINGLE("Mic Input Switch", TLV320AIC23_ANLG, 1, 1, 1),
	SOC_SINGLE("Mic Booster Switch", TLV320AIC23_ANLG, 0, 1, 0),
	SOC_TLV320AIC23_SINGLE_TLV("Sidetone Volume", TLV320AIC23_ANLG,
				  6, 4, 0, sidetone_vol_tlv),
	SOC_ENUM("Playback De-emphasis", tlv320aic23_deemph),
};

/* PGA Mixer controls for Line and Mic switch */
static const struct snd_kcontrol_new tlv320aic23_output_mixer_controls[] = {
	SOC_DAPM_SINGLE("Line Bypass Switch", TLV320AIC23_ANLG, 3, 1, 0),
	SOC_DAPM_SINGLE("Mic Sidetone Switch", TLV320AIC23_ANLG, 5, 1, 0),
	SOC_DAPM_SINGLE("Playback Switch", TLV320AIC23_ANLG, 4, 1, 0),
};

static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC", "Playback", TLV320AIC23_PWR, 3, 1),
	SND_SOC_DAPM_ADC("ADC", "Capture", TLV320AIC23_PWR, 2, 1),
	SND_SOC_DAPM_MUX("Capture Source", SND_SOC_NOPM, 0, 0,
			 &tlv320aic23_rec_src_mux_controls),
	SND_SOC_DAPM_MIXER("Output Mixer", TLV320AIC23_PWR, 4, 1,
			   &tlv320aic23_output_mixer_controls[0],
			   ARRAY_SIZE(tlv320aic23_output_mixer_controls)),
	SND_SOC_DAPM_PGA("Line Input", TLV320AIC23_PWR, 0, 1, NULL, 0),
	SND_SOC_DAPM_PGA("Mic Input", TLV320AIC23_PWR, 1, 1, NULL, 0),

	SND_SOC_DAPM_OUTPUT("LHPOUT"),
	SND_SOC_DAPM_OUTPUT("RHPOUT"),
	SND_SOC_DAPM_OUTPUT("LOUT"),
	SND_SOC_DAPM_OUTPUT("ROUT"),

	SND_SOC_DAPM_INPUT("LLINEIN"),
	SND_SOC_DAPM_INPUT("RLINEIN"),

	SND_SOC_DAPM_INPUT("MICIN"),
};

static const struct snd_soc_dapm_route intercon[] = {
	/* Output Mixer */
	{"Output Mixer", "Line Bypass Switch", "Line Input"},
	{"Output Mixer", "Playback Switch", "DAC"},
	{"Output Mixer", "Mic Sidetone Switch", "Mic Input"},

	/* Outputs */
	{"RHPOUT", NULL, "Output Mixer"},
	{"LHPOUT", NULL, "Output Mixer"},
	{"LOUT", NULL, "Output Mixer"},
	{"ROUT", NULL, "Output Mixer"},

	/* Inputs */
	{"Line Input", "NULL", "LLINEIN"},
	{"Line Input", "NULL", "RLINEIN"},

	{"Mic Input", "NULL", "MICIN"},

	/* input mux */
	{"Capture Source", "Line", "Line Input"},
	{"Capture Source", "Mic", "Mic Input"},
	{"ADC", NULL, "Capture Source"},

};

/* AIC23 driver data */
struct aic23 {
	struct snd_soc_codec codec;
	int mclk;
	int requested_adc;
	int requested_dac;
};

/*
 * Common Crystals used
 * 11.2896 Mhz /128 = *88.2k  /192 = 58.8k
 * 12.0000 Mhz /125 = *96k    /136 = 88.235K
 * 12.2880 Mhz /128 = *96k    /192 = 64k
 * 16.9344 Mhz /128 = 132.3k /192 = *88.2k
 * 18.4320 Mhz /128 = 144k   /192 = *96k
 */

/*
 * Normal BOSR 0-256/2 = 128, 1-384/2 = 192
 * USB BOSR 0-250/2 = 125, 1-272/2 = 136
 */
static const int bosr_usb_divisor_table[] = {
	128, 125, 192, 136
};
#define LOWER_GROUP ((1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<6) | (1<<7))
#define UPPER_GROUP ((1<<8) | (1<<9) | (1<<10) | (1<<11)        | (1<<15))
static const unsigned short sr_valid_mask[] = {
	LOWER_GROUP|UPPER_GROUP,	/* Normal, bosr - 0*/
	LOWER_GROUP|UPPER_GROUP,	/* Normal, bosr - 1*/
	LOWER_GROUP,			/* Usb, bosr - 0*/
	UPPER_GROUP,			/* Usb, bosr - 1*/
};
/*
 * Every divisor is a factor of 11*12
 */
#define SR_MULT (11*12)
#define A(x) (x) ? (SR_MULT/x) : 0
static const unsigned char sr_adc_mult_table[] = {
	A(2), A(2), A(12), A(12),  A(0), A(0), A(3), A(1),
	A(2), A(2), A(11), A(11),  A(0), A(0), A(0), A(1)
};
static const unsigned char sr_dac_mult_table[] = {
	A(2), A(12), A(2), A(12),  A(0), A(0), A(3), A(1),
	A(2), A(11), A(2), A(11),  A(0), A(0), A(0), A(1)
};

static unsigned get_score(int adc, int adc_l, int adc_h, int need_adc,
		int dac, int dac_l, int dac_h, int need_dac)
{
	if ((adc >= adc_l) && (adc <= adc_h) &&
			(dac >= dac_l) && (dac <= dac_h)) {
		int diff_adc = need_adc - adc;
		int diff_dac = need_dac - dac;
		return abs(diff_adc) + abs(diff_dac);
	}
	return UINT_MAX;
}

static int find_rate(int mclk, u32 need_adc, u32 need_dac)
{
	int i, j;
	int best_i = -1;
	int best_j = -1;
	int best_div = 0;
	unsigned best_score = UINT_MAX;
	int adc_l, adc_h, dac_l, dac_h;

	need_adc *= SR_MULT;
	need_dac *= SR_MULT;
	/*
	 * rates given are +/- 1/32
	 */
	adc_l = need_adc - (need_adc >> 5);
	adc_h = need_adc + (need_adc >> 5);
	dac_l = need_dac - (need_dac >> 5);
	dac_h = need_dac + (need_dac >> 5);
	for (i = 0; i < ARRAY_SIZE(bosr_usb_divisor_table); i++) {
		int base = mclk / bosr_usb_divisor_table[i];
		int mask = sr_valid_mask[i];
		for (j = 0; j < ARRAY_SIZE(sr_adc_mult_table);
				j++, mask >>= 1) {
			int adc;
			int dac;
			int score;
			if ((mask & 1) == 0)
				continue;
			adc = base * sr_adc_mult_table[j];
			dac = base * sr_dac_mult_table[j];
			score = get_score(adc, adc_l, adc_h, need_adc,
					dac, dac_l, dac_h, need_dac);
			if (best_score > score) {
				best_score = score;
				best_i = i;
				best_j = j;
				best_div = 0;
			}
			score = get_score((adc >> 1), adc_l, adc_h, need_adc,
					(dac >> 1), dac_l, dac_h, need_dac);
			/* prefer to have a /2 */
			if ((score != UINT_MAX) && (best_score >= score)) {
				best_score = score;
				best_i = i;
				best_j = j;
				best_div = 1;
			}
		}
	}
	return (best_j << 2) | best_i | (best_div << TLV320AIC23_CLKIN_SHIFT);
}

#ifdef DEBUG
static void get_current_sample_rates(struct snd_soc_codec *codec, int mclk,
		u32 *sample_rate_adc, u32 *sample_rate_dac)
{
	int src = tlv320aic23_read_reg_cache(codec, TLV320AIC23_SRATE);
	int sr = (src >> 2) & 0x0f;
	int val = (mclk / bosr_usb_divisor_table[src & 3]);
	int adc = (val * sr_adc_mult_table[sr]) / SR_MULT;
	int dac = (val * sr_dac_mult_table[sr]) / SR_MULT;
	if (src & TLV320AIC23_CLKIN_HALF) {
		adc >>= 1;
		dac >>= 1;
	}
	*sample_rate_adc = adc;
	*sample_rate_dac = dac;
}
#endif

static int set_sample_rate_control(struct snd_soc_codec *codec, int mclk,
		u32 sample_rate_adc, u32 sample_rate_dac)
{
	/* Search for the right sample rate */
	int data = find_rate(mclk, sample_rate_adc, sample_rate_dac);
	if (data < 0) {
		printk(KERN_ERR "%s:Invalid rate %u,%u requested\n",
				__func__, sample_rate_adc, sample_rate_dac);
		return -EINVAL;
	}
	tlv320aic23_write(codec, TLV320AIC23_SRATE, data);
#ifdef DEBUG
	{
		u32 adc, dac;
		get_current_sample_rates(codec, mclk, &adc, &dac);
		printk(KERN_DEBUG "actual samplerate = %u,%u reg=%x\n",
			adc, dac, data);
	}
#endif
	return 0;
}

static int tlv320aic23_add_widgets(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, tlv320aic23_dapm_widgets,
				  ARRAY_SIZE(tlv320aic23_dapm_widgets));

	/* set up audio path interconnects */
	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));

	snd_soc_dapm_new_widgets(codec);
	return 0;
}

static int tlv320aic23_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_reg;
	int ret;
	struct aic23 *aic23 = container_of(codec, struct aic23, codec);
	u32 sample_rate_adc = aic23->requested_adc;
	u32 sample_rate_dac = aic23->requested_dac;
	u32 sample_rate = params_rate(params);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		aic23->requested_dac = sample_rate_dac = sample_rate;
		if (!sample_rate_adc)
			sample_rate_adc = sample_rate;
	} else {
		aic23->requested_adc = sample_rate_adc = sample_rate;
		if (!sample_rate_dac)
			sample_rate_dac = sample_rate;
	}
	ret = set_sample_rate_control(codec, aic23->mclk, sample_rate_adc,
			sample_rate_dac);
	if (ret < 0)
		return ret;

	iface_reg =
	    tlv320aic23_read_reg_cache(codec,
				       TLV320AIC23_DIGT_FMT) & ~(0x03 << 2);
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		break;
	case SNDRV_PCM_FORMAT_S20_3LE:
		iface_reg |= (0x01 << 2);
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		iface_reg |= (0x02 << 2);
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		iface_reg |= (0x03 << 2);
		break;
	}
	tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);

	return 0;
}

static int tlv320aic23_pcm_prepare(struct snd_pcm_substream *substream,
				   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;

	/* set active */
	tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0001);

	return 0;
}

static void tlv320aic23_shutdown(struct snd_pcm_substream *substream,
				 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;
	struct aic23 *aic23 = container_of(codec, struct aic23, codec);

	/* deactivate */
	if (!codec->active) {
		udelay(50);
		tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
	}
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		aic23->requested_dac = 0;
	else
		aic23->requested_adc = 0;
}

static int tlv320aic23_mute(struct snd_soc_dai *dai, int mute)
{
	struct snd_soc_codec *codec = dai->codec;
	u16 reg;

	reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT);
	if (mute)
		reg |= TLV320AIC23_DACM_MUTE;

	else
		reg &= ~TLV320AIC23_DACM_MUTE;

	tlv320aic23_write(codec, TLV320AIC23_DIGT, reg);

	return 0;
}

static int tlv320aic23_set_dai_fmt(struct snd_soc_dai *codec_dai,
				   unsigned int fmt)
{
	struct snd_soc_codec *codec = codec_dai->codec;
	u16 iface_reg;

	iface_reg =
	    tlv320aic23_read_reg_cache(codec, TLV320AIC23_DIGT_FMT) & (~0x03);

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		iface_reg |= TLV320AIC23_MS_MASTER;
		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_reg |= TLV320AIC23_FOR_I2S;
		break;
	case SND_SOC_DAIFMT_DSP_B:
		iface_reg |= TLV320AIC23_FOR_DSP;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		iface_reg |= TLV320AIC23_FOR_LJUST;
		break;
	default:
		return -EINVAL;

	}

	tlv320aic23_write(codec, TLV320AIC23_DIGT_FMT, iface_reg);

	return 0;
}

static int tlv320aic23_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 aic23 *aic23 = container_of(codec, struct aic23, codec);
	aic23->mclk = freq;
	return 0;
}

static int tlv320aic23_set_bias_level(struct snd_soc_codec *codec,
				      enum snd_soc_bias_level level)
{
	u16 reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_PWR) & 0xff7f;

	switch (level) {
	case SND_SOC_BIAS_ON:
		/* vref/mid, osc on, dac unmute */
		tlv320aic23_write(codec, TLV320AIC23_PWR, reg);
		break;
	case SND_SOC_BIAS_PREPARE:
		break;
	case SND_SOC_BIAS_STANDBY:
		/* everything off except vref/vmid, */
		tlv320aic23_write(codec, TLV320AIC23_PWR, reg | 0x0040);
		break;
	case SND_SOC_BIAS_OFF:
		/* everything off, dac mute, inactive */
		tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
		tlv320aic23_write(codec, TLV320AIC23_PWR, 0xffff);
		break;
	}
	codec->bias_level = level;
	return 0;
}

#define AIC23_RATES	SNDRV_PCM_RATE_8000_96000
#define AIC23_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
			 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_ops tlv320aic23_dai_ops = {
	.prepare	= tlv320aic23_pcm_prepare,
	.hw_params	= tlv320aic23_hw_params,
	.shutdown	= tlv320aic23_shutdown,
	.digital_mute	= tlv320aic23_mute,
	.set_fmt	= tlv320aic23_set_dai_fmt,
	.set_sysclk	= tlv320aic23_set_dai_sysclk,
};

struct snd_soc_dai tlv320aic23_dai = {
	.name = "tlv320aic23",
	.playback = {
		     .stream_name = "Playback",
		     .channels_min = 2,
		     .channels_max = 2,
		     .rates = AIC23_RATES,
		     .formats = AIC23_FORMATS,},
	.capture = {
		    .stream_name = "Capture",
		    .channels_min = 2,
		    .channels_max = 2,
		    .rates = AIC23_RATES,
		    .formats = AIC23_FORMATS,},
	.ops = &tlv320aic23_dai_ops,
};
EXPORT_SYMBOL_GPL(tlv320aic23_dai);

static int tlv320aic23_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;

	tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x0);
	tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_OFF);

	return 0;
}

static int tlv320aic23_resume(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;
	int i;
	u16 reg;

	/* Sync reg_cache with the hardware */
	for (reg = 0; reg < ARRAY_SIZE(tlv320aic23_reg); i++) {
		u16 val = tlv320aic23_read_reg_cache(codec, reg);
		tlv320aic23_write(codec, reg, val);
	}

	tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
	tlv320aic23_set_bias_level(codec, codec->suspend_bias_level);

	return 0;
}

/*
 * initialise the AIC23 driver
 * register the mixer and dsp interfaces with the kernel
 */
static int tlv320aic23_init(struct snd_soc_device *socdev)
{
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret = 0;
	u16 reg;

	codec->name = "tlv320aic23";
	codec->owner = THIS_MODULE;
	codec->read = tlv320aic23_read_reg_cache;
	codec->write = tlv320aic23_write;
	codec->set_bias_level = tlv320aic23_set_bias_level;
	codec->dai = &tlv320aic23_dai;
	codec->num_dai = 1;
	codec->reg_cache_size = ARRAY_SIZE(tlv320aic23_reg);
	codec->reg_cache =
	    kmemdup(tlv320aic23_reg, sizeof(tlv320aic23_reg), GFP_KERNEL);
	if (codec->reg_cache == NULL)
		return -ENOMEM;

	/* Reset codec */
	tlv320aic23_write(codec, TLV320AIC23_RESET, 0);

	/* register pcms */
	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
	if (ret < 0) {
		printk(KERN_ERR "tlv320aic23: failed to create pcms\n");
		goto pcm_err;
	}

	/* power on device */
	tlv320aic23_set_bias_level(codec, SND_SOC_BIAS_STANDBY);

	tlv320aic23_write(codec, TLV320AIC23_DIGT, TLV320AIC23_DEEMP_44K);

	/* Unmute input */
	reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_LINVOL);
	tlv320aic23_write(codec, TLV320AIC23_LINVOL,
			  (reg & (~TLV320AIC23_LIM_MUTED)) |
			  (TLV320AIC23_LRS_ENABLED));

	reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_RINVOL);
	tlv320aic23_write(codec, TLV320AIC23_RINVOL,
			  (reg & (~TLV320AIC23_LIM_MUTED)) |
			  TLV320AIC23_LRS_ENABLED);

	reg = tlv320aic23_read_reg_cache(codec, TLV320AIC23_ANLG);
	tlv320aic23_write(codec, TLV320AIC23_ANLG,
			 (reg) & (~TLV320AIC23_BYPASS_ON) &
			 (~TLV320AIC23_MICM_MUTED));

	/* Default output volume */
	tlv320aic23_write(codec, TLV320AIC23_LCHNVOL,
			  TLV320AIC23_DEFAULT_OUT_VOL &
			  TLV320AIC23_OUT_VOL_MASK);
	tlv320aic23_write(codec, TLV320AIC23_RCHNVOL,
			  TLV320AIC23_DEFAULT_OUT_VOL &
			  TLV320AIC23_OUT_VOL_MASK);

	tlv320aic23_write(codec, TLV320AIC23_ACTIVE, 0x1);

	snd_soc_add_controls(codec, tlv320aic23_snd_controls,
				ARRAY_SIZE(tlv320aic23_snd_controls));
	tlv320aic23_add_widgets(codec);
	ret = snd_soc_init_card(socdev);
	if (ret < 0) {
		printk(KERN_ERR "tlv320aic23: 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 *tlv320aic23_socdev;

#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
/*
 * If the i2c layer weren't so broken, we could pass this kind of data
 * around
 */
static int tlv320aic23_codec_probe(struct i2c_client *i2c,
				   const struct i2c_device_id *i2c_id)
{
	struct snd_soc_device *socdev = tlv320aic23_socdev;
	struct snd_soc_codec *codec = socdev->card->codec;
	int ret;

	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EINVAL;

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

	ret = tlv320aic23_init(socdev);
	if (ret < 0) {
		printk(KERN_ERR "tlv320aic23: failed to initialise AIC23\n");
		goto err;
	}
	return ret;

err:
	kfree(codec);
	kfree(i2c);
	return ret;
}
static int __exit tlv320aic23_i2c_remove(struct i2c_client *i2c)
{
	put_device(&i2c->dev);
	return 0;
}

static const struct i2c_device_id tlv320aic23_id[] = {
	{"tlv320aic23", 0},
	{}
};

MODULE_DEVICE_TABLE(i2c, tlv320aic23_id);

static struct i2c_driver tlv320aic23_i2c_driver = {
	.driver = {
		   .name = "tlv320aic23",
		   },
	.probe = tlv320aic23_codec_probe,
	.remove = __exit_p(tlv320aic23_i2c_remove),
	.id_table = tlv320aic23_id,
};

#endif

static int tlv320aic23_probe(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec;
	struct aic23 *aic23;
	int ret = 0;

	printk(KERN_INFO "AIC23 Audio Codec %s\n", AIC23_VERSION);

	aic23 = kzalloc(sizeof(struct aic23), GFP_KERNEL);
	if (aic23 == NULL)
		return -ENOMEM;
	codec = &aic23->codec;
	socdev->card->codec = codec;
	mutex_init(&codec->mutex);
	INIT_LIST_HEAD(&codec->dapm_widgets);
	INIT_LIST_HEAD(&codec->dapm_paths);

	tlv320aic23_socdev = socdev;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
	codec->hw_write = (hw_write_t) i2c_master_send;
	codec->hw_read = NULL;
	ret = i2c_add_driver(&tlv320aic23_i2c_driver);
	if (ret != 0)
		printk(KERN_ERR "can't add i2c driver");
#endif
	return ret;
}

static int tlv320aic23_remove(struct platform_device *pdev)
{
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_codec *codec = socdev->card->codec;
	struct aic23 *aic23 = container_of(codec, struct aic23, codec);

	if (codec->control_data)
		tlv320aic23_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_del_driver(&tlv320aic23_i2c_driver);
#endif
	kfree(codec->reg_cache);
	kfree(aic23);

	return 0;
}
struct snd_soc_codec_device soc_codec_dev_tlv320aic23 = {
	.probe = tlv320aic23_probe,
	.remove = tlv320aic23_remove,
	.suspend = tlv320aic23_suspend,
	.resume = tlv320aic23_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_tlv320aic23);

static int __init tlv320aic23_modinit(void)
{
	return snd_soc_register_dai(&tlv320aic23_dai);
}
module_init(tlv320aic23_modinit);

static void __exit tlv320aic23_exit(void)
{
	snd_soc_unregister_dai(&tlv320aic23_dai);
}
module_exit(tlv320aic23_exit);

MODULE_DESCRIPTION("ASoC TLV320AIC23 codec driver");
MODULE_AUTHOR("Arun KS <arunks@mistralsolutions.com>");
MODULE_LICENSE("GPL");