summaryrefslogtreecommitdiff
path: root/sound/soc/sh/rcar/core.c
blob: f1e5920654f6ff74803b770ef31d66579fd9b8df (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
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
/*
 * Renesas R-Car SRU/SCU/SSIU/SSI support
 *
 * Copyright (C) 2013 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * Based on fsi.c
 * Kuninori Morimoto <morimoto.kuninori@renesas.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.
 */

/*
 * Renesas R-Car sound device structure
 *
 * Gen1
 *
 * SRU		: Sound Routing Unit
 *  - SRC	: Sampling Rate Converter
 *  - CMD
 *    - CTU	: Channel Count Conversion Unit
 *    - MIX	: Mixer
 *    - DVC	: Digital Volume and Mute Function
 *  - SSI	: Serial Sound Interface
 *
 * Gen2
 *
 * SCU		: Sampling Rate Converter Unit
 *  - SRC	: Sampling Rate Converter
 *  - CMD
 *   - CTU	: Channel Count Conversion Unit
 *   - MIX	: Mixer
 *   - DVC	: Digital Volume and Mute Function
 * SSIU		: Serial Sound Interface Unit
 *  - SSI	: Serial Sound Interface
 */

/*
 *	driver data Image
 *
 * rsnd_priv
 *   |
 *   | ** this depends on Gen1/Gen2
 *   |
 *   +- gen
 *   |
 *   | ** these depend on data path
 *   | ** gen and platform data control it
 *   |
 *   +- rdai[0]
 *   |   |		 sru     ssiu      ssi
 *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 *   |   |
 *   |   |		 sru     ssiu      ssi
 *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 *   |
 *   +- rdai[1]
 *   |   |		 sru     ssiu      ssi
 *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 *   |   |
 *   |   |		 sru     ssiu      ssi
 *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 *   ...
 *   |
 *   | ** these control ssi
 *   |
 *   +- ssi
 *   |  |
 *   |  +- ssi[0]
 *   |  +- ssi[1]
 *   |  +- ssi[2]
 *   |  ...
 *   |
 *   | ** these control src
 *   |
 *   +- src
 *      |
 *      +- src[0]
 *      +- src[1]
 *      +- src[2]
 *      ...
 *
 *
 * for_each_rsnd_dai(xx, priv, xx)
 *  rdai[0] => rdai[1] => rdai[2] => ...
 *
 * for_each_rsnd_mod(xx, rdai, xx)
 *  [mod] => [mod] => [mod] => ...
 *
 * rsnd_dai_call(xxx, fn )
 *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
 *
 */
#include <linux/pm_runtime.h>
#include "rsnd.h"

#define RSND_RATES SNDRV_PCM_RATE_8000_96000
#define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)

static const struct rsnd_of_data rsnd_of_data_gen1 = {
	.flags = RSND_GEN1,
};

static const struct rsnd_of_data rsnd_of_data_gen2 = {
	.flags = RSND_GEN2,
};

static const struct of_device_id rsnd_of_match[] = {
	{ .compatible = "renesas,rcar_sound-gen1", .data = &rsnd_of_data_gen1 },
	{ .compatible = "renesas,rcar_sound-gen2", .data = &rsnd_of_data_gen2 },
	{},
};
MODULE_DEVICE_TABLE(of, rsnd_of_match);

/*
 *	rsnd_platform functions
 */
#define rsnd_platform_call(priv, dai, func, param...)	\
	(!(priv->info->func) ? 0 :		\
	 priv->info->func(param))

#define rsnd_is_enable_path(io, name) \
	((io)->info ? (io)->info->name : NULL)
#define rsnd_info_id(priv, io, name) \
	((io)->info->name - priv->info->name##_info)

/*
 *	rsnd_mod functions
 */
char *rsnd_mod_name(struct rsnd_mod *mod)
{
	if (!mod || !mod->ops)
		return "unknown";

	return mod->ops->name;
}

struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
				  struct rsnd_mod *mod)
{
	if (!mod || !mod->ops || !mod->ops->dma_req)
		return NULL;

	return mod->ops->dma_req(io, mod);
}

int rsnd_mod_init(struct rsnd_priv *priv,
		  struct rsnd_mod *mod,
		   struct rsnd_mod_ops *ops,
		   struct clk *clk,
		   enum rsnd_mod_type type,
		   int id)
{
	int ret = clk_prepare(clk);

	if (ret)
		return ret;

	mod->id		= id;
	mod->ops	= ops;
	mod->type	= type;
	mod->clk	= clk;
	mod->priv	= priv;

	return ret;
}

void rsnd_mod_quit(struct rsnd_mod *mod)
{
	if (mod->clk)
		clk_unprepare(mod->clk);
}

void rsnd_mod_interrupt(struct rsnd_mod *mod,
			void (*callback)(struct rsnd_mod *mod,
					 struct rsnd_dai_stream *io))
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct rsnd_dai_stream *io;
	struct rsnd_dai *rdai;
	int i, j;

	for_each_rsnd_dai(rdai, priv, j) {

		for (i = 0; i < RSND_MOD_MAX; i++) {
			io = &rdai->playback;
			if (mod == io->mod[i])
				callback(mod, io);

			io = &rdai->capture;
			if (mod == io->mod[i])
				callback(mod, io);
		}
	}
}

int rsnd_io_is_working(struct rsnd_dai_stream *io)
{
	/* see rsnd_dai_stream_init/quit() */
	return !!io->substream;
}

/*
 *	settting function
 */
u32 rsnd_get_adinr(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	struct device *dev = rsnd_priv_to_dev(priv);
	u32 adinr = runtime->channels;

	switch (runtime->sample_bits) {
	case 16:
		adinr |= (8 << 16);
		break;
	case 32:
		adinr |= (0 << 16);
		break;
	default:
		dev_warn(dev, "not supported sample bits\n");
		return 0;
	}

	return adinr;
}

/*
 *	rsnd_dai functions
 */
#define __rsnd_mod_call(mod, io, func, param...)		\
({								\
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);		\
	struct device *dev = rsnd_priv_to_dev(priv);		\
	u32 mask = 0xF << __rsnd_mod_shift_##func;			\
	u8 val  = (mod->status >> __rsnd_mod_shift_##func) & 0xF;	\
	u8 add  = ((val + __rsnd_mod_add_##func) & 0xF);		\
	int ret = 0;							\
	int called = 0;							\
	if (val == __rsnd_mod_call_##func) {				\
		called = 1;						\
		ret = (mod)->ops->func(mod, io, param);			\
		mod->status = (mod->status & ~mask) +			\
			(add << __rsnd_mod_shift_##func);		\
	}								\
	dev_dbg(dev, "%s[%d] 0x%08x %s\n",				\
		rsnd_mod_name(mod), rsnd_mod_id(mod), mod->status,	\
		called ? #func : "");					\
	ret;								\
})

#define rsnd_mod_call(mod, io, func, param...)	\
	(!(mod) ? -ENODEV :			\
	 !((mod)->ops->func) ? 0 :		\
	 __rsnd_mod_call(mod, io, func, param))

#define rsnd_dai_call(fn, io, param...)				\
({								\
	struct rsnd_mod *mod;					\
	int ret = 0, i;						\
	for (i = 0; i < RSND_MOD_MAX; i++) {			\
		mod = (io)->mod[i];				\
		if (!mod)					\
			continue;				\
		ret = rsnd_mod_call(mod, io, fn, param);	\
		if (ret < 0)					\
			break;					\
	}							\
	ret;							\
})

static int rsnd_dai_connect(struct rsnd_mod *mod,
			    struct rsnd_dai_stream *io)
{
	if (!mod)
		return -EIO;

	if (io->mod[mod->type]) {
		struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
		struct device *dev = rsnd_priv_to_dev(priv);

		dev_err(dev, "%s[%d] is not empty\n",
			rsnd_mod_name(mod),
			rsnd_mod_id(mod));
		return -EIO;
	}

	io->mod[mod->type] = mod;

	return 0;
}

static void rsnd_dai_disconnect(struct rsnd_mod *mod,
				struct rsnd_dai_stream *io)
{
	io->mod[mod->type] = NULL;
}

struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
{
	if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
		return NULL;

	return priv->rdai + id;
}

#define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
{
	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);

	return rsnd_rdai_get(priv, dai->id);
}

/*
 *	rsnd_soc_dai functions
 */
int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
{
	struct snd_pcm_substream *substream = io->substream;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int pos = io->byte_pos + additional;

	pos %= (runtime->periods * io->byte_per_period);

	return pos;
}

bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
{
	io->byte_pos += byte;

	if (io->byte_pos >= io->next_period_byte) {
		struct snd_pcm_substream *substream = io->substream;
		struct snd_pcm_runtime *runtime = substream->runtime;

		io->period_pos++;
		io->next_period_byte += io->byte_per_period;

		if (io->period_pos >= runtime->periods) {
			io->byte_pos = 0;
			io->period_pos = 0;
			io->next_period_byte = io->byte_per_period;
		}

		return true;
	}

	return false;
}

void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
{
	struct snd_pcm_substream *substream = io->substream;

	/*
	 * this function should be called...
	 *
	 * - if rsnd_dai_pointer_update() returns true
	 * - without spin lock
	 */

	snd_pcm_period_elapsed(substream);
}

static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
				struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	io->substream		= substream;
	io->byte_pos		= 0;
	io->period_pos		= 0;
	io->byte_per_period	= runtime->period_size *
				  runtime->channels *
				  samples_to_bytes(runtime, 1);
	io->next_period_byte	= io->byte_per_period;
}

static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
{
	io->substream		= NULL;
}

static
struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	return  rtd->cpu_dai;
}

static
struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
					struct snd_pcm_substream *substream)
{
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		return &rdai->playback;
	else
		return &rdai->capture;
}

static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
			    struct snd_soc_dai *dai)
{
	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
	int ssi_id = rsnd_mod_id(rsnd_io_to_mod_ssi(io));
	int ret;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		rsnd_dai_stream_init(io, substream);

		ret = rsnd_platform_call(priv, dai, start, ssi_id);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_dai_call(init, io, priv);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_dai_call(start, io, priv);
		if (ret < 0)
			goto dai_trigger_end;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		ret = rsnd_dai_call(stop, io, priv);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_dai_call(quit, io, priv);
		if (ret < 0)
			goto dai_trigger_end;

		ret = rsnd_platform_call(priv, dai, stop, ssi_id);
		if (ret < 0)
			goto dai_trigger_end;

		rsnd_dai_stream_quit(io);
		break;
	default:
		ret = -EINVAL;
	}

dai_trigger_end:
	spin_unlock_irqrestore(&priv->lock, flags);

	return ret;
}

static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
		rdai->clk_master = 0;
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
		rdai->clk_master = 1; /* codec is slave, cpu is master */
		break;
	default:
		return -EINVAL;
	}

	/* set format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		rdai->sys_delay = 0;
		rdai->data_alignment = 0;
		rdai->frm_clk_inv = 0;
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		rdai->sys_delay = 1;
		rdai->data_alignment = 0;
		rdai->frm_clk_inv = 1;
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		rdai->sys_delay = 1;
		rdai->data_alignment = 1;
		rdai->frm_clk_inv = 1;
		break;
	}

	/* set clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_IF:
		rdai->bit_clk_inv =  rdai->bit_clk_inv;
		rdai->frm_clk_inv = !rdai->frm_clk_inv;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		rdai->bit_clk_inv = !rdai->bit_clk_inv;
		rdai->frm_clk_inv =  rdai->frm_clk_inv;
		break;
	case SND_SOC_DAIFMT_IB_IF:
		rdai->bit_clk_inv = !rdai->bit_clk_inv;
		rdai->frm_clk_inv = !rdai->frm_clk_inv;
		break;
	case SND_SOC_DAIFMT_NB_NF:
	default:
		break;
	}

	return 0;
}

static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
	.trigger	= rsnd_soc_dai_trigger,
	.set_fmt	= rsnd_soc_dai_set_fmt,
};

#define rsnd_path_parse(priv, io, type)				\
({								\
	struct rsnd_mod *mod;					\
	int ret = 0;						\
	int id = -1;						\
								\
	if (rsnd_is_enable_path(io, type)) {			\
		id = rsnd_info_id(priv, io, type);		\
		if (id >= 0) {					\
			mod = rsnd_##type##_mod_get(priv, id);	\
			ret = rsnd_dai_connect(mod, io);	\
		}						\
	}							\
	ret;							\
})

#define rsnd_path_break(priv, io, type)				\
{								\
	struct rsnd_mod *mod;					\
	int id = -1;						\
								\
	if (rsnd_is_enable_path(io, type)) {			\
		id = rsnd_info_id(priv, io, type);		\
		if (id >= 0) {					\
			mod = rsnd_##type##_mod_get(priv, id);	\
			rsnd_dai_disconnect(mod, io);		\
		}						\
	}							\
}

static int rsnd_path_init(struct rsnd_priv *priv,
			  struct rsnd_dai *rdai,
			  struct rsnd_dai_stream *io)
{
	int ret;

	/*
	 * Gen1 is created by SRU/SSI, and this SRU is base module of
	 * Gen2's SCU/SSIU/SSI. (Gen2 SCU/SSIU came from SRU)
	 *
	 * Easy image is..
	 *	Gen1 SRU = Gen2 SCU + SSIU + etc
	 *
	 * Gen2 SCU path is very flexible, but, Gen1 SRU (SCU parts) is
	 * using fixed path.
	 */

	/* SRC */
	ret = rsnd_path_parse(priv, io, src);
	if (ret < 0)
		return ret;

	/* SSI */
	ret = rsnd_path_parse(priv, io, ssi);
	if (ret < 0)
		return ret;

	/* DVC */
	ret = rsnd_path_parse(priv, io, dvc);
	if (ret < 0)
		return ret;

	return ret;
}

static void rsnd_of_parse_dai(struct platform_device *pdev,
			      const struct rsnd_of_data *of_data,
			      struct rsnd_priv *priv)
{
	struct device_node *dai_node,	*dai_np;
	struct device_node *ssi_node,	*ssi_np;
	struct device_node *src_node,	*src_np;
	struct device_node *dvc_node,	*dvc_np;
	struct device_node *playback, *capture;
	struct rsnd_dai_platform_info *dai_info;
	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
	struct device *dev = &pdev->dev;
	int nr, i;
	int dai_i, ssi_i, src_i, dvc_i;

	if (!of_data)
		return;

	dai_node = of_get_child_by_name(dev->of_node, "rcar_sound,dai");
	if (!dai_node)
		return;

	nr = of_get_child_count(dai_node);
	if (!nr)
		return;

	dai_info = devm_kzalloc(dev,
				sizeof(struct rsnd_dai_platform_info) * nr,
				GFP_KERNEL);
	if (!dai_info) {
		dev_err(dev, "dai info allocation error\n");
		return;
	}

	info->dai_info_nr	= nr;
	info->dai_info		= dai_info;

	ssi_node = of_get_child_by_name(dev->of_node, "rcar_sound,ssi");
	src_node = of_get_child_by_name(dev->of_node, "rcar_sound,src");
	dvc_node = of_get_child_by_name(dev->of_node, "rcar_sound,dvc");

#define mod_parse(name)							\
if (name##_node) {							\
	struct rsnd_##name##_platform_info *name##_info;		\
									\
	name##_i = 0;							\
	for_each_child_of_node(name##_node, name##_np) {		\
		name##_info = info->name##_info + name##_i;		\
									\
		if (name##_np == playback)				\
			dai_info->playback.name = name##_info;		\
		if (name##_np == capture)				\
			dai_info->capture.name = name##_info;		\
									\
		name##_i++;						\
	}								\
}

	/*
	 * parse all dai
	 */
	dai_i = 0;
	for_each_child_of_node(dai_node, dai_np) {
		dai_info = info->dai_info + dai_i;

		for (i = 0;; i++) {

			playback = of_parse_phandle(dai_np, "playback", i);
			capture  = of_parse_phandle(dai_np, "capture", i);

			if (!playback && !capture)
				break;

			mod_parse(ssi);
			mod_parse(src);
			mod_parse(dvc);

			of_node_put(playback);
			of_node_put(capture);
		}

		dai_i++;
	}
}

static int rsnd_dai_probe(struct platform_device *pdev,
			  const struct rsnd_of_data *of_data,
			  struct rsnd_priv *priv)
{
	struct snd_soc_dai_driver *drv;
	struct rcar_snd_info *info = rsnd_priv_to_info(priv);
	struct rsnd_dai *rdai;
	struct rsnd_ssi_platform_info *pmod, *cmod;
	struct device *dev = rsnd_priv_to_dev(priv);
	int dai_nr;
	int i;

	rsnd_of_parse_dai(pdev, of_data, priv);

	dai_nr = info->dai_info_nr;
	if (!dai_nr) {
		dev_err(dev, "no dai\n");
		return -EIO;
	}

	drv  = devm_kzalloc(dev, sizeof(*drv)  * dai_nr, GFP_KERNEL);
	rdai = devm_kzalloc(dev, sizeof(*rdai) * dai_nr, GFP_KERNEL);
	if (!drv || !rdai) {
		dev_err(dev, "dai allocate failed\n");
		return -ENOMEM;
	}

	priv->rdai_nr	= dai_nr;
	priv->daidrv	= drv;
	priv->rdai	= rdai;

	for (i = 0; i < dai_nr; i++) {

		pmod = info->dai_info[i].playback.ssi;
		cmod = info->dai_info[i].capture.ssi;

		/*
		 *	init rsnd_dai
		 */
		snprintf(rdai[i].name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", i);
		rdai[i].priv = priv;

		/*
		 *	init snd_soc_dai_driver
		 */
		drv[i].name	= rdai[i].name;
		drv[i].ops	= &rsnd_soc_dai_ops;
		if (pmod) {
			snprintf(rdai[i].playback.name, RSND_DAI_NAME_SIZE,
				 "DAI%d Playback", i);

			drv[i].playback.rates		= RSND_RATES;
			drv[i].playback.formats		= RSND_FMTS;
			drv[i].playback.channels_min	= 2;
			drv[i].playback.channels_max	= 2;
			drv[i].playback.stream_name	= rdai[i].playback.name;

			rdai[i].playback.info = &info->dai_info[i].playback;
			rdai[i].playback.rdai = rdai + i;
			rsnd_path_init(priv, &rdai[i], &rdai[i].playback);
		}
		if (cmod) {
			snprintf(rdai[i].capture.name, RSND_DAI_NAME_SIZE,
				 "DAI%d Capture", i);

			drv[i].capture.rates		= RSND_RATES;
			drv[i].capture.formats		= RSND_FMTS;
			drv[i].capture.channels_min	= 2;
			drv[i].capture.channels_max	= 2;
			drv[i].capture.stream_name	= rdai[i].capture.name;

			rdai[i].capture.info = &info->dai_info[i].capture;
			rdai[i].capture.rdai = rdai + i;
			rsnd_path_init(priv, &rdai[i], &rdai[i].capture);
		}

		dev_dbg(dev, "%s (%s/%s)\n", rdai[i].name,
			pmod ? "play"    : " -- ",
			cmod ? "capture" : "  --   ");
	}

	return 0;
}

/*
 *		pcm ops
 */
static struct snd_pcm_hardware rsnd_pcm_hardware = {
	.info =		SNDRV_PCM_INFO_INTERLEAVED	|
			SNDRV_PCM_INFO_MMAP		|
			SNDRV_PCM_INFO_MMAP_VALID,
	.buffer_bytes_max	= 64 * 1024,
	.period_bytes_min	= 32,
	.period_bytes_max	= 8192,
	.periods_min		= 1,
	.periods_max		= 32,
	.fifo_size		= 256,
};

static int rsnd_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret = 0;

	snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);

	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);

	return ret;
}

static int rsnd_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *hw_params)
{
	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
	int ret;

	ret = rsnd_dai_call(hw_params, io, substream, hw_params);
	if (ret)
		return ret;

	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);

	return bytes_to_frames(runtime, io->byte_pos);
}

static struct snd_pcm_ops rsnd_pcm_ops = {
	.open		= rsnd_pcm_open,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= rsnd_hw_params,
	.hw_free	= snd_pcm_lib_free_pages,
	.pointer	= rsnd_pointer,
};

/*
 *		snd_kcontrol
 */
#define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
			   struct snd_ctl_elem_info *uinfo)
{
	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);

	if (cfg->texts) {
		uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
		uinfo->count = cfg->size;
		uinfo->value.enumerated.items = cfg->max;
		if (uinfo->value.enumerated.item >= cfg->max)
			uinfo->value.enumerated.item = cfg->max - 1;
		strlcpy(uinfo->value.enumerated.name,
			cfg->texts[uinfo->value.enumerated.item],
			sizeof(uinfo->value.enumerated.name));
	} else {
		uinfo->count = cfg->size;
		uinfo->value.integer.min = 0;
		uinfo->value.integer.max = cfg->max;
		uinfo->type = (cfg->max == 1) ?
			SNDRV_CTL_ELEM_TYPE_BOOLEAN :
			SNDRV_CTL_ELEM_TYPE_INTEGER;
	}

	return 0;
}

static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
			  struct snd_ctl_elem_value *uc)
{
	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
	int i;

	for (i = 0; i < cfg->size; i++)
		if (cfg->texts)
			uc->value.enumerated.item[i] = cfg->val[i];
		else
			uc->value.integer.value[i] = cfg->val[i];

	return 0;
}

static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
			  struct snd_ctl_elem_value *uc)
{
	struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
	int i, change = 0;

	for (i = 0; i < cfg->size; i++) {
		if (cfg->texts) {
			change |= (uc->value.enumerated.item[i] != cfg->val[i]);
			cfg->val[i] = uc->value.enumerated.item[i];
		} else {
			change |= (uc->value.integer.value[i] != cfg->val[i]);
			cfg->val[i] = uc->value.integer.value[i];
		}
	}

	if (change)
		cfg->update(cfg->io, mod);

	return change;
}

static int __rsnd_kctrl_new(struct rsnd_mod *mod,
			    struct rsnd_dai_stream *io,
			    struct snd_soc_pcm_runtime *rtd,
			    const unsigned char *name,
			    struct rsnd_kctrl_cfg *cfg,
			    void (*update)(struct rsnd_dai_stream *io,
					   struct rsnd_mod *mod))
{
	struct snd_soc_card *soc_card = rtd->card;
	struct snd_card *card = rtd->card->snd_card;
	struct snd_kcontrol *kctrl;
	struct snd_kcontrol_new knew = {
		.iface		= SNDRV_CTL_ELEM_IFACE_MIXER,
		.name		= name,
		.info		= rsnd_kctrl_info,
		.index		= rtd - soc_card->rtd,
		.get		= rsnd_kctrl_get,
		.put		= rsnd_kctrl_put,
		.private_value	= (unsigned long)cfg,
	};
	int ret;

	kctrl = snd_ctl_new1(&knew, mod);
	if (!kctrl)
		return -ENOMEM;

	ret = snd_ctl_add(card, kctrl);
	if (ret < 0) {
		snd_ctl_free_one(kctrl);
		return ret;
	}

	cfg->update = update;
	cfg->card = card;
	cfg->kctrl = kctrl;
	cfg->io = io;

	return 0;
}

void _rsnd_kctrl_remove(struct rsnd_kctrl_cfg *cfg)
{
	snd_ctl_remove(cfg->card, cfg->kctrl);
}

int rsnd_kctrl_new_m(struct rsnd_mod *mod,
		     struct rsnd_dai_stream *io,
		     struct snd_soc_pcm_runtime *rtd,
		     const unsigned char *name,
		     void (*update)(struct rsnd_dai_stream *io,
				    struct rsnd_mod *mod),
		     struct rsnd_kctrl_cfg_m *_cfg,
		     u32 max)
{
	_cfg->cfg.max	= max;
	_cfg->cfg.size	= RSND_DVC_CHANNELS;
	_cfg->cfg.val	= _cfg->val;
	return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
}

int rsnd_kctrl_new_s(struct rsnd_mod *mod,
		     struct rsnd_dai_stream *io,
		     struct snd_soc_pcm_runtime *rtd,
		     const unsigned char *name,
		     void (*update)(struct rsnd_dai_stream *io,
				    struct rsnd_mod *mod),
		     struct rsnd_kctrl_cfg_s *_cfg,
		     u32 max)
{
	_cfg->cfg.max	= max;
	_cfg->cfg.size	= 1;
	_cfg->cfg.val	= &_cfg->val;
	return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
}

int rsnd_kctrl_new_e(struct rsnd_mod *mod,
		     struct rsnd_dai_stream *io,
		     struct snd_soc_pcm_runtime *rtd,
		     const unsigned char *name,
		     struct rsnd_kctrl_cfg_s *_cfg,
		     void (*update)(struct rsnd_dai_stream *io,
				    struct rsnd_mod *mod),
		     const char * const *texts,
		     u32 max)
{
	_cfg->cfg.max	= max;
	_cfg->cfg.size	= 1;
	_cfg->cfg.val	= &_cfg->val;
	_cfg->cfg.texts	= texts;
	return __rsnd_kctrl_new(mod, io, rtd, name, &_cfg->cfg, update);
}

/*
 *		snd_soc_platform
 */

#define PREALLOC_BUFFER		(32 * 1024)
#define PREALLOC_BUFFER_MAX	(32 * 1024)

static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *dai = rtd->cpu_dai;
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	int ret;

	ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
	if (ret)
		return ret;

	ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
	if (ret)
		return ret;

	return snd_pcm_lib_preallocate_pages_for_all(
		rtd->pcm,
		SNDRV_DMA_TYPE_DEV,
		rtd->card->snd_card->dev,
		PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
}

static struct snd_soc_platform_driver rsnd_soc_platform = {
	.ops		= &rsnd_pcm_ops,
	.pcm_new	= rsnd_pcm_new,
};

static const struct snd_soc_component_driver rsnd_soc_component = {
	.name		= "rsnd",
};

static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
				       struct rsnd_dai_stream *io)
{
	int ret;

	ret = rsnd_dai_call(probe, io, priv);
	if (ret == -EAGAIN) {
		/*
		 * Fallback to PIO mode
		 */

		/*
		 * call "remove" for SSI/SRC/DVC
		 * SSI will be switch to PIO mode if it was DMA mode
		 * see
		 *	rsnd_dma_init()
		 *	rsnd_ssi_fallback()
		 */
		rsnd_dai_call(remove, io, priv);

		/*
		 * remove SRC/DVC from DAI,
		 */
		rsnd_path_break(priv, io, src);
		rsnd_path_break(priv, io, dvc);

		/*
		 * fallback
		 */
		rsnd_dai_call(fallback, io, priv);

		/*
		 * retry to "probe".
		 * DAI has SSI which is PIO mode only now.
		 */
		ret = rsnd_dai_call(probe, io, priv);
	}

	return ret;
}

/*
 *	rsnd probe
 */
static int rsnd_probe(struct platform_device *pdev)
{
	struct rcar_snd_info *info;
	struct rsnd_priv *priv;
	struct device *dev = &pdev->dev;
	struct rsnd_dai *rdai;
	const struct of_device_id *of_id = of_match_device(rsnd_of_match, dev);
	const struct rsnd_of_data *of_data;
	int (*probe_func[])(struct platform_device *pdev,
			    const struct rsnd_of_data *of_data,
			    struct rsnd_priv *priv) = {
		rsnd_gen_probe,
		rsnd_dma_probe,
		rsnd_ssi_probe,
		rsnd_src_probe,
		rsnd_dvc_probe,
		rsnd_adg_probe,
		rsnd_dai_probe,
	};
	int ret, i;

	info = NULL;
	of_data = NULL;
	if (of_id) {
		info = devm_kzalloc(&pdev->dev,
				    sizeof(struct rcar_snd_info), GFP_KERNEL);
		of_data = of_id->data;
	} else {
		info = pdev->dev.platform_data;
	}

	if (!info) {
		dev_err(dev, "driver needs R-Car sound information\n");
		return -ENODEV;
	}

	/*
	 *	init priv data
	 */
	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(dev, "priv allocate failed\n");
		return -ENODEV;
	}

	priv->pdev	= pdev;
	priv->info	= info;
	spin_lock_init(&priv->lock);

	/*
	 *	init each module
	 */
	for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
		ret = probe_func[i](pdev, of_data, priv);
		if (ret)
			return ret;
	}

	for_each_rsnd_dai(rdai, priv, i) {
		ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
		if (ret)
			goto exit_snd_probe;

		ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
		if (ret)
			goto exit_snd_probe;
	}

	dev_set_drvdata(dev, priv);

	/*
	 *	asoc register
	 */
	ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
	if (ret < 0) {
		dev_err(dev, "cannot snd soc register\n");
		return ret;
	}

	ret = snd_soc_register_component(dev, &rsnd_soc_component,
					 priv->daidrv, rsnd_rdai_nr(priv));
	if (ret < 0) {
		dev_err(dev, "cannot snd dai register\n");
		goto exit_snd_soc;
	}

	pm_runtime_enable(dev);

	dev_info(dev, "probed\n");
	return ret;

exit_snd_soc:
	snd_soc_unregister_platform(dev);
exit_snd_probe:
	for_each_rsnd_dai(rdai, priv, i) {
		rsnd_dai_call(remove, &rdai->playback, priv);
		rsnd_dai_call(remove, &rdai->capture, priv);
	}

	return ret;
}

static int rsnd_remove(struct platform_device *pdev)
{
	struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
	struct rsnd_dai *rdai;
	void (*remove_func[])(struct platform_device *pdev,
			      struct rsnd_priv *priv) = {
		rsnd_ssi_remove,
		rsnd_src_remove,
		rsnd_dvc_remove,
	};
	int ret = 0, i;

	pm_runtime_disable(&pdev->dev);

	for_each_rsnd_dai(rdai, priv, i) {
		ret |= rsnd_dai_call(remove, &rdai->playback, priv);
		ret |= rsnd_dai_call(remove, &rdai->capture, priv);
	}

	for (i = 0; i < ARRAY_SIZE(remove_func); i++)
		remove_func[i](pdev, priv);

	snd_soc_unregister_component(&pdev->dev);
	snd_soc_unregister_platform(&pdev->dev);

	return ret;
}

static struct platform_driver rsnd_driver = {
	.driver	= {
		.name	= "rcar_sound",
		.of_match_table = rsnd_of_match,
	},
	.probe		= rsnd_probe,
	.remove		= rsnd_remove,
};
module_platform_driver(rsnd_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Renesas R-Car audio driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_ALIAS("platform:rcar-pcm-audio");