summaryrefslogtreecommitdiffstats
path: root/sound/soc/codecs/ak4613.c
blob: 73fb35560e5149ec595623a9181d072ccd53468c (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
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
// SPDX-License-Identifier: GPL-2.0
//
// ak4613.c  --  Asahi Kasei ALSA Soc Audio driver
//
// Copyright (C) 2015 Renesas Electronics Corporation
// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
//
// Based on ak4642.c by Kuninori Morimoto
// Based on wm8731.c by Richard Purdie
// Based on ak4535.c by Richard Purdie
// Based on wm8753.c by Liam Girdwood

/*
 *		+-------+
 *		|AK4613	|
 *	SDTO1 <-|	|
 *		|	|
 *	SDTI1 ->|	|
 *	SDTI2 ->|	|
 *	SDTI3 ->|	|
 *		+-------+
 *
 *	  +---+
 * clk	  |   |___________________________________________...
 *
 * [TDM512]
 * SDTO1  [L1][R1][L2][R2]
 * SDTI1  [L1][R1][L2][R2][L3][R3][L4][R4][L5][R5][L6][R6]
 *
 * [TDM256]
 * SDTO1  [L1][R1][L2][R2]
 * SDTI1  [L1][R1][L2][R2][L3][R3][L4][R4]
 * SDTI2  [L5][R5][L6][R6]
 *
 * [TDM128]
 * SDTO1  [L1][R1][L2][R2]
 * SDTI1  [L1][R1][L2][R2]
 * SDTI2  [L3][R3][L4][R4]
 * SDTI3  [L5][R5][L6][R6]
 *
 * [STEREO]
 *	Playback  2ch : SDTI1
 *	Capture   2ch : SDTO1
 *
 * [TDM512]
 *	Playback 12ch : SDTI1
 *	Capture   4ch : SDTO1
 *
 * [TDM256]
 *	Playback 12ch : SDTI1 + SDTI2
 *	Playback  8ch : SDTI1
 *	Capture   4ch : SDTO1
 *
 * [TDM128]
 *	Playback 12ch : SDTI1 + SDTI2 + SDTI3
 *	Playback  8ch : SDTI1 + SDTI2
 *	Playback  4ch : SDTI1
 *	Capture   4ch : SDTO1
 *
 *
 * !!! NOTE !!!
 *
 * Renesas is the only user of ak4613 on upstream so far,
 * but the chip connection is like below.
 * Thus, Renesas can't test all connection case.
 * Tested TDM is very limited.
 *
 * +-----+	+-----------+
 * | SoC |	|  AK4613   |
 * |     |<-----|SDTO1	 IN1|<-- Mic
 * |     |	|	 IN2|
 * |     |	|	    |
 * |     |----->|SDTI1	OUT1|--> Headphone
 * +-----+	|SDTI2	OUT2|
 *		|SDTI3	OUT3|
 *		|	OUT4|
 *		|	OUT5|
 *		|	OUT6|
 *		+-----------+
 *
 * Renesas SoC can handle [2,  6,8]    channels.
 * Ak4613      can handle [2,4,  8,12] channels.
 *
 * Because of above HW connection and available channels number,
 * Renesas could test are ...
 *
 *	[STEREO] Playback  2ch : SDTI1
 *		 Capture   2ch : SDTO1
 *	[TDM256] Playback  8ch : SDTI1 (*)
 *
 * (*) it used 8ch data between SoC <-> AK4613 on TDM256 mode,
 *     but could confirm is only first 2ch because only 1
 *     Headphone is connected.
 *
 * see
 *	AK4613_ENABLE_TDM_TEST
 */
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>

#define PW_MGMT1	0x00 /* Power Management 1 */
#define PW_MGMT2	0x01 /* Power Management 2 */
#define PW_MGMT3	0x02 /* Power Management 3 */
#define CTRL1		0x03 /* Control 1 */
#define CTRL2		0x04 /* Control 2 */
#define DEMP1		0x05 /* De-emphasis1 */
#define DEMP2		0x06 /* De-emphasis2 */
#define OFD		0x07 /* Overflow Detect */
#define ZRD		0x08 /* Zero Detect */
#define ICTRL		0x09 /* Input Control */
#define OCTRL		0x0a /* Output Control */
#define LOUT1		0x0b /* LOUT1 Volume Control */
#define ROUT1		0x0c /* ROUT1 Volume Control */
#define LOUT2		0x0d /* LOUT2 Volume Control */
#define ROUT2		0x0e /* ROUT2 Volume Control */
#define LOUT3		0x0f /* LOUT3 Volume Control */
#define ROUT3		0x10 /* ROUT3 Volume Control */
#define LOUT4		0x11 /* LOUT4 Volume Control */
#define ROUT4		0x12 /* ROUT4 Volume Control */
#define LOUT5		0x13 /* LOUT5 Volume Control */
#define ROUT5		0x14 /* ROUT5 Volume Control */
#define LOUT6		0x15 /* LOUT6 Volume Control */
#define ROUT6		0x16 /* ROUT6 Volume Control */

/* PW_MGMT1 */
#define RSTN		BIT(0)
#define PMDAC		BIT(1)
#define PMADC		BIT(2)
#define PMVR		BIT(3)

/* PW_MGMT2 */
#define PMAD_ALL	0x7

/* PW_MGMT3 */
#define PMDA_ALL	0x3f

/* CTRL1 */
#define DIF0		BIT(3)
#define DIF1		BIT(4)
#define DIF2		BIT(5)
#define TDM0		BIT(6)
#define TDM1		BIT(7)
#define NO_FMT		(0xff)
#define FMT_MASK	(0xf8)

/* CTRL2 */
#define DFS_MASK		(3 << 2)
#define DFS_NORMAL_SPEED	(0 << 2)
#define DFS_DOUBLE_SPEED	(1 << 2)
#define DFS_QUAD_SPEED		(2 << 2)

/* ICTRL */
#define ICTRL_MASK	(0x3)

/* OCTRL */
#define OCTRL_MASK	(0x3F)

/*
 * configs
 *
 * 0x000000BA
 *
 * B : AK4613_CONFIG_SDTI_x
 * A : AK4613_CONFIG_MODE_x
 */
#define AK4613_CONFIG_SET(priv, x)	 priv->configs |= AK4613_CONFIG_##x
#define AK4613_CONFIG_GET(priv, x)	(priv->configs &  AK4613_CONFIG_##x##_MASK)

/*
 * AK4613_CONFIG_SDTI_x
 *
 * It indicates how many SDTIx is connected.
 */
#define AK4613_CONFIG_SDTI_MASK		(0xF << 4)
#define AK4613_CONFIG_SDTI(x)		(((x) & 0xF) << 4)
#define AK4613_CONFIG_SDTI_set(priv, x)	  AK4613_CONFIG_SET(priv, SDTI(x))
#define AK4613_CONFIG_SDTI_get(priv)	((AK4613_CONFIG_GET(priv, SDTI) >> 4) & 0xF)

/*
 * AK4613_CONFIG_MODE_x
 *
 * Same as Ctrl1 :: TDM1/TDM0
 * No shift is requested
 * see
 *	AK4613_CTRL1_TO_MODE()
 *	Table 11/12/13/14
 */
#define AK4613_CONFIG_MODE_MASK		(0xF)
#define AK4613_CONFIG_MODE_STEREO	(0x0)
#define AK4613_CONFIG_MODE_TDM512	(0x1)
#define AK4613_CONFIG_MODE_TDM256	(0x2)
#define AK4613_CONFIG_MODE_TDM128	(0x3)

/*
 * !!!! FIXME !!!!
 *
 * Because of testable HW limitation, TDM256 8ch TDM was only tested.
 * This driver uses AK4613_ENABLE_TDM_TEST instead of new DT property so far.
 * Don't hesitate to update driver, you don't need to care compatible
 * with Renesas.
 *
 * #define AK4613_ENABLE_TDM_TEST
 */

struct ak4613_interface {
	unsigned int width;
	unsigned int fmt;
	u8 dif;
};

struct ak4613_priv {
	struct mutex lock;
	struct snd_pcm_hw_constraint_list constraint_rates;
	struct snd_pcm_hw_constraint_list constraint_channels;
	struct work_struct dummy_write_work;
	struct snd_soc_component *component;
	unsigned int rate;
	unsigned int sysclk;

	unsigned int fmt;
	unsigned int configs;
	int cnt;
	u8 ctrl1;
	u8 oc;
	u8 ic;
};

/*
 * Playback Volume
 *
 * max : 0x00 : 0 dB
 *       ( 0.5 dB step )
 * min : 0xFE : -127.0 dB
 * mute: 0xFF
 */
static const DECLARE_TLV_DB_SCALE(out_tlv, -12750, 50, 1);

static const struct snd_kcontrol_new ak4613_snd_controls[] = {
	SOC_DOUBLE_R_TLV("Digital Playback Volume1", LOUT1, ROUT1,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume2", LOUT2, ROUT2,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume3", LOUT3, ROUT3,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume4", LOUT4, ROUT4,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume5", LOUT5, ROUT5,
			 0, 0xFF, 1, out_tlv),
	SOC_DOUBLE_R_TLV("Digital Playback Volume6", LOUT6, ROUT6,
			 0, 0xFF, 1, out_tlv),
};

static const struct reg_default ak4613_reg[] = {
	{ 0x0,  0x0f }, { 0x1,  0x07 }, { 0x2,  0x3f }, { 0x3,  0x20 },
	{ 0x4,  0x20 }, { 0x5,  0x55 }, { 0x6,  0x05 }, { 0x7,  0x07 },
	{ 0x8,  0x0f }, { 0x9,  0x07 }, { 0xa,  0x3f }, { 0xb,  0x00 },
	{ 0xc,  0x00 }, { 0xd,  0x00 }, { 0xe,  0x00 }, { 0xf,  0x00 },
	{ 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 },
	{ 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
};

/*
 * CTRL1 register
 * see
 *	Table 11/12/13/14
 */
#define AUDIO_IFACE(_dif, _width, _fmt)		\
	{					\
		.dif	= _dif,			\
		.width	= _width,		\
		.fmt	= SND_SOC_DAIFMT_##_fmt,\
	}
static const struct ak4613_interface ak4613_iface[] = {
	/* It doesn't support asymmetric format */

	AUDIO_IFACE(0x03, 24, LEFT_J),
	AUDIO_IFACE(0x04, 24, I2S),
};
#define AK4613_CTRL1_TO_MODE(priv)	((priv)->ctrl1 >> 6) /* AK4613_CONFIG_MODE_x */

static const struct regmap_config ak4613_regmap_cfg = {
	.reg_bits		= 8,
	.val_bits		= 8,
	.max_register		= 0x16,
	.reg_defaults		= ak4613_reg,
	.num_reg_defaults	= ARRAY_SIZE(ak4613_reg),
	.cache_type		= REGCACHE_RBTREE,
};

static const struct of_device_id ak4613_of_match[] = {
	{ .compatible = "asahi-kasei,ak4613",	.data = &ak4613_regmap_cfg },
	{},
};
MODULE_DEVICE_TABLE(of, ak4613_of_match);

static const struct i2c_device_id ak4613_i2c_id[] = {
	{ "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id);

static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = {

	/* Outputs */
	SND_SOC_DAPM_OUTPUT("LOUT1"),
	SND_SOC_DAPM_OUTPUT("LOUT2"),
	SND_SOC_DAPM_OUTPUT("LOUT3"),
	SND_SOC_DAPM_OUTPUT("LOUT4"),
	SND_SOC_DAPM_OUTPUT("LOUT5"),
	SND_SOC_DAPM_OUTPUT("LOUT6"),

	SND_SOC_DAPM_OUTPUT("ROUT1"),
	SND_SOC_DAPM_OUTPUT("ROUT2"),
	SND_SOC_DAPM_OUTPUT("ROUT3"),
	SND_SOC_DAPM_OUTPUT("ROUT4"),
	SND_SOC_DAPM_OUTPUT("ROUT5"),
	SND_SOC_DAPM_OUTPUT("ROUT6"),

	/* Inputs */
	SND_SOC_DAPM_INPUT("LIN1"),
	SND_SOC_DAPM_INPUT("LIN2"),

	SND_SOC_DAPM_INPUT("RIN1"),
	SND_SOC_DAPM_INPUT("RIN2"),

	/* DAC */
	SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0),
	SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0),
	SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0),
	SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0),
	SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0),
	SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0),

	/* ADC */
	SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0),
	SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0),
};

static const struct snd_soc_dapm_route ak4613_intercon[] = {
	{"LOUT1", NULL, "DAC1"},
	{"LOUT2", NULL, "DAC2"},
	{"LOUT3", NULL, "DAC3"},
	{"LOUT4", NULL, "DAC4"},
	{"LOUT5", NULL, "DAC5"},
	{"LOUT6", NULL, "DAC6"},

	{"ROUT1", NULL, "DAC1"},
	{"ROUT2", NULL, "DAC2"},
	{"ROUT3", NULL, "DAC3"},
	{"ROUT4", NULL, "DAC4"},
	{"ROUT5", NULL, "DAC5"},
	{"ROUT6", NULL, "DAC6"},

	{"DAC1", NULL, "Playback"},
	{"DAC2", NULL, "Playback"},
	{"DAC3", NULL, "Playback"},
	{"DAC4", NULL, "Playback"},
	{"DAC5", NULL, "Playback"},
	{"DAC6", NULL, "Playback"},

	{"Capture", NULL, "ADC1"},
	{"Capture", NULL, "ADC2"},

	{"ADC1", NULL, "LIN1"},
	{"ADC2", NULL, "LIN2"},

	{"ADC1", NULL, "RIN1"},
	{"ADC2", NULL, "RIN2"},
};

static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
			       struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
	struct device *dev = component->dev;

	mutex_lock(&priv->lock);
	priv->cnt--;
	if (priv->cnt < 0) {
		dev_err(dev, "unexpected counter error\n");
		priv->cnt = 0;
	}
	if (!priv->cnt)
		priv->ctrl1 = 0;
	mutex_unlock(&priv->lock);
}

static void ak4613_hw_constraints(struct ak4613_priv *priv,
				  struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	static const unsigned int ak4613_rates[] = {
		 32000,
		 44100,
		 48000,
		 64000,
		 88200,
		 96000,
		176400,
		192000,
	};
#define AK4613_CHANNEL_2	 0
#define AK4613_CHANNEL_4	 1
#define AK4613_CHANNEL_8	 2
#define AK4613_CHANNEL_12	 3
#define AK4613_CHANNEL_NONE	-1
	static const unsigned int ak4613_channels[] = {
		[AK4613_CHANNEL_2]  =  2,
		[AK4613_CHANNEL_4]  =  4,
		[AK4613_CHANNEL_8]  =  8,
		[AK4613_CHANNEL_12] = 12,
	};
#define MODE_MAX 4
#define SDTx_MAX 4
#define MASK(x) (1 << AK4613_CHANNEL_##x)
	static const int mask_list[MODE_MAX][SDTx_MAX] = {
		/* 				SDTO	 SDTIx1    SDTIx2		SDTIx3 */
		[AK4613_CONFIG_MODE_STEREO] = { MASK(2), MASK(2),  MASK(2),		MASK(2)},
		[AK4613_CONFIG_MODE_TDM512] = { MASK(4), MASK(12), MASK(12),		MASK(12)},
		[AK4613_CONFIG_MODE_TDM256] = { MASK(4), MASK(8),  MASK(8)|MASK(12),	MASK(8)|MASK(12)},
		[AK4613_CONFIG_MODE_TDM128] = { MASK(4), MASK(4),  MASK(4)|MASK(8),	MASK(4)|MASK(8)|MASK(12)},
	};
	struct snd_pcm_hw_constraint_list *constraint;
	unsigned int mask;
	unsigned int mode;
	unsigned int fs;
	int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
	int sdti_num;
	int i;

	constraint		= &priv->constraint_rates;
	constraint->list	= ak4613_rates;
	constraint->mask	= 0;
	constraint->count	= 0;

	/*
	 * Slave Mode
	 *	Normal: [32kHz, 48kHz] : 256fs,384fs or 512fs
	 *	Double: [64kHz, 96kHz] : 256fs
	 *	Quad  : [128kHz,192kHz]: 128fs
	 *
	 * Master mode
	 *	Normal: [32kHz, 48kHz] : 256fs or 512fs
	 *	Double: [64kHz, 96kHz] : 256fs
	 *	Quad  : [128kHz,192kHz]: 128fs
	*/
	for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) {
		/* minimum fs on each range */
		fs = (ak4613_rates[i] <= 96000) ? 256 : 128;

		if (priv->sysclk >= ak4613_rates[i] * fs)
			constraint->count = i + 1;
	}

	snd_pcm_hw_constraint_list(runtime, 0,
				SNDRV_PCM_HW_PARAM_RATE, constraint);


	sdti_num = AK4613_CONFIG_SDTI_get(priv);
	if (WARN_ON(sdti_num >= SDTx_MAX))
		return;

	if (priv->cnt) {
		/*
		 * If it was already working,
		 * the constraint is same as working mode.
		 */
		mode = AK4613_CTRL1_TO_MODE(priv);
		mask = 0; /* no default */
	} else {
		/*
		 * It is not yet working,
		 * the constraint is based on board configs.
		 * STEREO mask is default
		 */
		mode = AK4613_CONFIG_GET(priv, MODE);
		mask = mask_list[AK4613_CONFIG_MODE_STEREO][is_play * sdti_num];
	}

	if (WARN_ON(mode >= MODE_MAX))
		return;

	/* add each mode mask */
	mask |= mask_list[mode][is_play * sdti_num];

	constraint		= &priv->constraint_channels;
	constraint->list	= ak4613_channels;
	constraint->mask	= mask;
	constraint->count	= sizeof(ak4613_channels);
	snd_pcm_hw_constraint_list(runtime, 0,
				   SNDRV_PCM_HW_PARAM_CHANNELS, constraint);
}

static int ak4613_dai_startup(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);

	mutex_lock(&priv->lock);
	ak4613_hw_constraints(priv, substream);
	priv->cnt++;
	mutex_unlock(&priv->lock);

	return 0;
}

static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai,
				 int clk_id, unsigned int freq, int dir)
{
	struct snd_soc_component *component = codec_dai->component;
	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);

	priv->sysclk = freq;

	return 0;
}

static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int format)
{
	struct snd_soc_component *component = dai->component;
	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
	unsigned int fmt;

	fmt = format & SND_SOC_DAIFMT_FORMAT_MASK;
	switch (fmt) {
	case SND_SOC_DAIFMT_LEFT_J:
	case SND_SOC_DAIFMT_I2S:
		priv->fmt = fmt;
		break;
	default:
		return -EINVAL;
	}

	fmt = format & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK;
	switch (fmt) {
	case SND_SOC_DAIFMT_CBC_CFC:
		break;
	default:
		/*
		 * SUPPORTME
		 *
		 * "clock provider" is not yet supperted
		 */
		return -EINVAL;
	}

	return 0;
}

static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
	struct device *dev = component->dev;
	unsigned int width = params_width(params);
	unsigned int fmt = priv->fmt;
	unsigned int rate;
	int i, ret;
	u8 ctrl2;

	rate = params_rate(params);
	switch (rate) {
	case 32000:
	case 44100:
	case 48000:
		ctrl2 = DFS_NORMAL_SPEED;
		break;
	case 64000:
	case 88200:
	case 96000:
		ctrl2 = DFS_DOUBLE_SPEED;
		break;
	case 176400:
	case 192000:
		ctrl2 = DFS_QUAD_SPEED;
		break;
	default:
		return -EINVAL;
	}
	priv->rate = rate;

	/*
	 * FIXME
	 *
	 * It doesn't have full TDM suppert yet
	 */
	ret = -EINVAL;

	mutex_lock(&priv->lock);
	if (priv->cnt > 1) {
		/*
		 * If it was already working, use current priv->ctrl1
		 */
		ret = 0;
	} else {
		/*
		 * It is not yet working,
		 */
		unsigned int channel = params_channels(params);
		u8 tdm;

		/* STEREO or TDM */
		if (channel == 2)
			tdm = AK4613_CONFIG_MODE_STEREO;
		else
			tdm = AK4613_CONFIG_GET(priv, MODE);

		for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
			const struct ak4613_interface *iface = ak4613_iface + i;

			if ((iface->fmt == fmt) && (iface->width == width)) {
				/*
				 * Ctrl1
				 * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0  |
				 * |TDM1|TDM0|DIF2|DIF1|DIF0|ATS1|ATS0|SMUTE|
				 *  <  tdm  > < iface->dif >
				 */
				priv->ctrl1 = (tdm << 6) | (iface->dif << 3);
				ret = 0;
				break;
			}
		}
	}
	mutex_unlock(&priv->lock);

	if (ret < 0)
		goto hw_params_end;

	snd_soc_component_update_bits(component, CTRL1, FMT_MASK, priv->ctrl1);
	snd_soc_component_update_bits(component, CTRL2, DFS_MASK, ctrl2);

	snd_soc_component_update_bits(component, ICTRL, ICTRL_MASK, priv->ic);
	snd_soc_component_update_bits(component, OCTRL, OCTRL_MASK, priv->oc);

hw_params_end:
	if (ret < 0)
		dev_warn(dev, "unsupported data width/format combination\n");

	return ret;
}

static int ak4613_set_bias_level(struct snd_soc_component *component,
				 enum snd_soc_bias_level level)
{
	u8 mgmt1 = 0;

	switch (level) {
	case SND_SOC_BIAS_ON:
		mgmt1 |= RSTN;
		fallthrough;
	case SND_SOC_BIAS_PREPARE:
		mgmt1 |= PMADC | PMDAC;
		fallthrough;
	case SND_SOC_BIAS_STANDBY:
		mgmt1 |= PMVR;
		fallthrough;
	case SND_SOC_BIAS_OFF:
	default:
		break;
	}

	snd_soc_component_write(component, PW_MGMT1, mgmt1);

	return 0;
}

static void ak4613_dummy_write(struct work_struct *work)
{
	struct ak4613_priv *priv = container_of(work,
						struct ak4613_priv,
						dummy_write_work);
	struct snd_soc_component *component = priv->component;
	unsigned int mgmt1;
	unsigned int mgmt3;

	/*
	 * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
	 *
	 * Note
	 *
	 * To avoid extra delay, we want to avoid preemption here,
	 * but we can't. Because it uses I2C access which is using IRQ
	 * and sleep. Thus, delay might be more than 5 LR clocks
	 * see also
	 *	ak4613_dai_trigger()
	 */
	udelay(5000000 / priv->rate);

	mgmt1 = snd_soc_component_read(component, PW_MGMT1);
	mgmt3 = snd_soc_component_read(component, PW_MGMT3);

	snd_soc_component_write(component, PW_MGMT1, mgmt1);
	snd_soc_component_write(component, PW_MGMT3, mgmt3);
}

static int ak4613_dai_trigger(struct snd_pcm_substream *substream, int cmd,
			      struct snd_soc_dai *dai)
{
	struct snd_soc_component *component = dai->component;
	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);

	/*
	 * FIXME
	 *
	 * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
	 * from Power Down Release. Otherwise, Playback volume will be 0dB.
	 * To avoid complex multiple delay/dummy_write method from
	 * ak4613_set_bias_level() / SND_SOC_DAPM_DAC_E("DACx", ...),
	 * call it once here.
	 *
	 * But, unfortunately, we can't "write" here because here is atomic
	 * context (It uses I2C access for writing).
	 * Thus, use schedule_work() to switching to normal context
	 * immediately.
	 *
	 * Note
	 *
	 * Calling ak4613_dummy_write() function might be delayed.
	 * In such case, ak4613 volume might be temporarily 0dB when
	 * beggining of playback.
	 * see also
	 *	ak4613_dummy_write()
	 */

	if ((cmd != SNDRV_PCM_TRIGGER_START) &&
	    (cmd != SNDRV_PCM_TRIGGER_RESUME))
		return 0;

	if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
		return  0;

	priv->component = component;
	schedule_work(&priv->dummy_write_work);

	return 0;
}

/*
 * Select below from Sound Card, not Auto
 *	SND_SOC_DAIFMT_CBC_CFC
 *	SND_SOC_DAIFMT_CBP_CFP
 */
static u64 ak4613_dai_formats =
	SND_SOC_POSSIBLE_DAIFMT_I2S	|
	SND_SOC_POSSIBLE_DAIFMT_LEFT_J;

static const struct snd_soc_dai_ops ak4613_dai_ops = {
	.startup	= ak4613_dai_startup,
	.shutdown	= ak4613_dai_shutdown,
	.set_sysclk	= ak4613_dai_set_sysclk,
	.set_fmt	= ak4613_dai_set_fmt,
	.trigger	= ak4613_dai_trigger,
	.hw_params	= ak4613_dai_hw_params,
	.auto_selectable_formats	= &ak4613_dai_formats,
	.num_auto_selectable_formats	= 1,
};

#define AK4613_PCM_RATE		(SNDRV_PCM_RATE_32000  |\
				 SNDRV_PCM_RATE_44100  |\
				 SNDRV_PCM_RATE_48000  |\
				 SNDRV_PCM_RATE_64000  |\
				 SNDRV_PCM_RATE_88200  |\
				 SNDRV_PCM_RATE_96000  |\
				 SNDRV_PCM_RATE_176400 |\
				 SNDRV_PCM_RATE_192000)
#define AK4613_PCM_FMTBIT	(SNDRV_PCM_FMTBIT_S24_LE)

static struct snd_soc_dai_driver ak4613_dai = {
	.name = "ak4613-hifi",
	.playback = {
		.stream_name	= "Playback",
		.channels_min	= 2,
		.channels_max	= 12,
		.rates		= AK4613_PCM_RATE,
		.formats	= AK4613_PCM_FMTBIT,
	},
	.capture = {
		.stream_name	= "Capture",
		.channels_min	= 2,
		.channels_max	= 4,
		.rates		= AK4613_PCM_RATE,
		.formats	= AK4613_PCM_FMTBIT,
	},
	.ops = &ak4613_dai_ops,
	.symmetric_rate = 1,
};

static int ak4613_suspend(struct snd_soc_component *component)
{
	struct regmap *regmap = dev_get_regmap(component->dev, NULL);

	regcache_cache_only(regmap, true);
	regcache_mark_dirty(regmap);
	return 0;
}

static int ak4613_resume(struct snd_soc_component *component)
{
	struct regmap *regmap = dev_get_regmap(component->dev, NULL);

	regcache_cache_only(regmap, false);
	return regcache_sync(regmap);
}

static const struct snd_soc_component_driver soc_component_dev_ak4613 = {
	.suspend		= ak4613_suspend,
	.resume			= ak4613_resume,
	.set_bias_level		= ak4613_set_bias_level,
	.controls		= ak4613_snd_controls,
	.num_controls		= ARRAY_SIZE(ak4613_snd_controls),
	.dapm_widgets		= ak4613_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(ak4613_dapm_widgets),
	.dapm_routes		= ak4613_intercon,
	.num_dapm_routes	= ARRAY_SIZE(ak4613_intercon),
	.idle_bias_on		= 1,
	.endianness		= 1,
};

static void ak4613_parse_of(struct ak4613_priv *priv,
			    struct device *dev)
{
	struct device_node *np = dev->of_node;
	char prop[32];
	int sdti_num;
	int i;

	/* Input 1 - 2 */
	for (i = 0; i < 2; i++) {
		snprintf(prop, sizeof(prop), "asahi-kasei,in%d-single-end", i + 1);
		if (!of_get_property(np, prop, NULL))
			priv->ic |= 1 << i;
	}

	/* Output 1 - 6 */
	for (i = 0; i < 6; i++) {
		snprintf(prop, sizeof(prop), "asahi-kasei,out%d-single-end", i + 1);
		if (!of_get_property(np, prop, NULL))
			priv->oc |= 1 << i;
	}

	/*
	 * enable TDM256 test
	 *
	 * !!! FIXME !!!
	 *
	 * It should be configured by DT or other way
	 * if it was full supported.
	 * But it is using ifdef style for now for test
	 * purpose.
	 */
#if defined(AK4613_ENABLE_TDM_TEST)
	AK4613_CONFIG_SET(priv, MODE_TDM256);
#endif

	/*
	 * connected STDI
	 * TDM support is assuming it is probed via Audio-Graph-Card style here.
	 * Default is SDTIx1 if it was probed via Simple-Audio-Card for now.
	 */
	sdti_num = of_graph_get_endpoint_count(np);
	if ((sdti_num >= SDTx_MAX) || (sdti_num < 1))
		sdti_num = 1;

	AK4613_CONFIG_SDTI_set(priv, sdti_num);
}

static int ak4613_i2c_probe(struct i2c_client *i2c)
{
	struct device *dev = &i2c->dev;
	const struct regmap_config *regmap_cfg;
	struct regmap *regmap;
	struct ak4613_priv *priv;

	regmap_cfg = i2c_get_match_data(i2c);
	if (!regmap_cfg)
		return -EINVAL;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	ak4613_parse_of(priv, dev);

	priv->ctrl1		= 0;
	priv->cnt		= 0;
	priv->sysclk		= 0;
	INIT_WORK(&priv->dummy_write_work, ak4613_dummy_write);

	mutex_init(&priv->lock);

	i2c_set_clientdata(i2c, priv);

	regmap = devm_regmap_init_i2c(i2c, regmap_cfg);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	return devm_snd_soc_register_component(dev, &soc_component_dev_ak4613,
				      &ak4613_dai, 1);
}

static struct i2c_driver ak4613_i2c_driver = {
	.driver = {
		.name = "ak4613-codec",
		.of_match_table = ak4613_of_match,
	},
	.probe		= ak4613_i2c_probe,
	.id_table	= ak4613_i2c_id,
};

module_i2c_driver(ak4613_i2c_driver);

MODULE_DESCRIPTION("Soc AK4613 driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_LICENSE("GPL v2");