summaryrefslogtreecommitdiffstats
path: root/sound/soc/sti/uniperif_player.c
blob: f6eefe1b8f8f1c6ad28b8c5ee00ee473d0d833ef (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
/*
 * Copyright (C) STMicroelectronics SA 2015
 * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
 *          for STMicroelectronics.
 * License terms:  GNU General Public License (GPL), version 2
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>

#include <sound/asoundef.h>
#include <sound/soc.h>

#include "uniperif.h"

/*
 * Some hardware-related definitions
 */

/* sys config registers definitions */
#define SYS_CFG_AUDIO_GLUE 0xA4
#define SYS_CFG_AUDI0_GLUE_PCM_CLKX 8

/*
 * Driver specific types.
 */
#define UNIPERIF_PLAYER_TYPE_IS_HDMI(p) \
	((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_HDMI)
#define UNIPERIF_PLAYER_TYPE_IS_PCM(p) \
	((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_PCM)
#define UNIPERIF_PLAYER_TYPE_IS_SPDIF(p) \
	((p)->info->player_type == SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF)
#define UNIPERIF_PLAYER_TYPE_IS_IEC958(p) \
	(UNIPERIF_PLAYER_TYPE_IS_HDMI(p) || \
		UNIPERIF_PLAYER_TYPE_IS_SPDIF(p))

#define UNIPERIF_PLAYER_CLK_ADJ_MIN  -999999
#define UNIPERIF_PLAYER_CLK_ADJ_MAX  1000000

/*
 * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
 * integrate  DAI_CPU capability in term of rate and supported channels
 */
static const struct snd_pcm_hardware uni_player_pcm_hw = {
	.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
		SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
		SNDRV_PCM_INFO_MMAP_VALID,
	.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE,

	.rates = SNDRV_PCM_RATE_CONTINUOUS,
	.rate_min = 8000,
	.rate_max = 192000,

	.channels_min = 2,
	.channels_max = 8,

	.periods_min = 2,
	.periods_max = 48,

	.period_bytes_min = 128,
	.period_bytes_max = 64 * PAGE_SIZE,
	.buffer_bytes_max = 256 * PAGE_SIZE
};

static inline int reset_player(struct uniperif *player)
{
	int count = 10;

	if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
		while (GET_UNIPERIF_SOFT_RST_SOFT_RST(player) && count) {
			udelay(5);
			count--;
		}
	}

	if (!count) {
		dev_err(player->dev, "Failed to reset uniperif");
		return -EIO;
	}

	return 0;
}

/*
 * uni_player_irq_handler
 * In case of error audio stream is stopped; stop action is protected via PCM
 * stream lock to avoid race condition with trigger callback.
 */
static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
{
	irqreturn_t ret = IRQ_NONE;
	struct uniperif *player = dev_id;
	unsigned int status;
	unsigned int tmp;

	if (player->state == UNIPERIF_STATE_STOPPED) {
		/* Unexpected IRQ: do nothing */
		return IRQ_NONE;
	}

	/* Get interrupt status & clear them immediately */
	status = GET_UNIPERIF_ITS(player);
	SET_UNIPERIF_ITS_BCLR(player, status);

	/* Check for fifo error (underrun) */
	if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(player))) {
		dev_err(player->dev, "FIFO underflow error detected");

		/* Interrupt is just for information when underflow recovery */
		if (player->info->underflow_enabled) {
			/* Update state to underflow */
			player->state = UNIPERIF_STATE_UNDERFLOW;

		} else {
			/* Disable interrupt so doesn't continually fire */
			SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player);

			/* Stop the player */
			snd_pcm_stream_lock(player->substream);
			snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
			snd_pcm_stream_unlock(player->substream);
		}

		ret = IRQ_HANDLED;
	}

	/* Check for dma error (overrun) */
	if (unlikely(status & UNIPERIF_ITS_DMA_ERROR_MASK(player))) {
		dev_err(player->dev, "DMA error detected");

		/* Disable interrupt so doesn't continually fire */
		SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player);

		/* Stop the player */
		snd_pcm_stream_lock(player->substream);
		snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
		snd_pcm_stream_unlock(player->substream);

		ret = IRQ_HANDLED;
	}

	/* Check for underflow recovery done */
	if (unlikely(status & UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player))) {
		if (!player->info->underflow_enabled) {
			dev_err(player->dev, "unexpected Underflow recovering");
			return -EPERM;
		}
		/* Read the underflow recovery duration */
		tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player);

		/* Clear the underflow recovery duration */
		SET_UNIPERIF_BIT_CONTROL_CLR_UNDERFLOW_DURATION(player);

		/* Update state to started */
		player->state = UNIPERIF_STATE_STARTED;

		ret = IRQ_HANDLED;
	}

	/* Check if underflow recovery failed */
	if (unlikely(status &
		     UNIPERIF_ITM_UNDERFLOW_REC_FAILED_MASK(player))) {
		dev_err(player->dev, "Underflow recovery failed");

		/* Stop the player */
		snd_pcm_stream_lock(player->substream);
		snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
		snd_pcm_stream_unlock(player->substream);

		ret = IRQ_HANDLED;
	}

	return ret;
}

static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
{
	int rate_adjusted, rate_achieved, delta, ret;
	int adjustment = player->clk_adj;

	/*
	 *             a
	 * F = f + --------- * f = f + d
	 *          1000000
	 *
	 *         a
	 * d = --------- * f
	 *      1000000
	 *
	 * where:
	 *   f - nominal rate
	 *   a - adjustment in ppm (parts per milion)
	 *   F - rate to be set in synthesizer
	 *   d - delta (difference) between f and F
	 */
	if (adjustment < 0) {
		/* div64_64 operates on unsigned values... */
		delta = -1;
		adjustment = -adjustment;
	} else {
		delta = 1;
	}
	/* 500000 ppm is 0.5, which is used to round up values */
	delta *= (int)div64_u64((uint64_t)rate *
				(uint64_t)adjustment + 500000, 1000000);
	rate_adjusted = rate + delta;

	/* Adjusted rate should never be == 0 */
	if (!rate_adjusted)
		return -EINVAL;

	ret = clk_set_rate(player->clk, rate_adjusted);
	if (ret < 0)
		return ret;

	rate_achieved = clk_get_rate(player->clk);
	if (!rate_achieved)
		/* If value is 0 means that clock or parent not valid */
		return -EINVAL;

	/*
	 * Using ALSA's adjustment control, we can modify the rate to be up
	 * to twice as much as requested, but no more
	 */
	delta = rate_achieved - rate;
	if (delta < 0) {
		/* div64_64 operates on unsigned values... */
		delta = -delta;
		adjustment = -1;
	} else {
		adjustment = 1;
	}
	/* Frequency/2 is added to round up result */
	adjustment *= (int)div64_u64((uint64_t)delta * 1000000 + rate / 2,
				     rate);
	player->clk_adj = adjustment;
	return 0;
}

static void uni_player_set_channel_status(struct uniperif *player,
					  struct snd_pcm_runtime *runtime)
{
	int n;
	unsigned int status;

	/*
	 * Some AVRs and TVs require the channel status to contain a correct
	 * sampling frequency. If no sample rate is already specified, then
	 * set one.
	 */
	mutex_lock(&player->ctrl_lock);
	if (runtime && (player->stream_settings.iec958.status[3]
					== IEC958_AES3_CON_FS_NOTID)) {
		switch (runtime->rate) {
		case 22050:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_22050;
			break;
		case 44100:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_44100;
			break;
		case 88200:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_88200;
			break;
		case 176400:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_176400;
			break;
		case 24000:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_24000;
			break;
		case 48000:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_48000;
			break;
		case 96000:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_96000;
			break;
		case 192000:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_192000;
			break;
		case 32000:
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_32000;
			break;
		default:
			/* Mark as sampling frequency not indicated */
			player->stream_settings.iec958.status[3] =
						IEC958_AES3_CON_FS_NOTID;
			break;
		}
	}

	/* Audio mode:
	 * Use audio mode status to select PCM or encoded mode
	 */
	if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO)
		player->stream_settings.encoding_mode =
			UNIPERIF_IEC958_ENCODING_MODE_ENCODED;
	else
		player->stream_settings.encoding_mode =
			UNIPERIF_IEC958_ENCODING_MODE_PCM;

	if (player->stream_settings.encoding_mode ==
		UNIPERIF_IEC958_ENCODING_MODE_PCM)
		/* Clear user validity bits */
		SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);
	else
		/* Set user validity bits */
		SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 1);

	/* Program the new channel status */
	for (n = 0; n < 6; ++n) {
		status  =
		player->stream_settings.iec958.status[0 + (n * 4)] & 0xf;
		status |=
		player->stream_settings.iec958.status[1 + (n * 4)] << 8;
		status |=
		player->stream_settings.iec958.status[2 + (n * 4)] << 16;
		status |=
		player->stream_settings.iec958.status[3 + (n * 4)] << 24;
		SET_UNIPERIF_CHANNEL_STA_REGN(player, n, status);
	}
	mutex_unlock(&player->ctrl_lock);

	/* Update the channel status */
	if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
		SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
	else
		SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);
}

static int uni_player_prepare_iec958(struct uniperif *player,
				     struct snd_pcm_runtime *runtime)
{
	int clk_div;

	clk_div = player->mclk / runtime->rate;

	/* Oversampling must be multiple of 128 as iec958 frame is 32-bits */
	if ((clk_div % 128) || (clk_div <= 0)) {
		dev_err(player->dev, "%s: invalid clk_div %d",
			__func__, clk_div);
		return -EINVAL;
	}

	switch (runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		/* 16/16 memory format */
		SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
		/* 16-bits per sub-frame */
		SET_UNIPERIF_I2S_FMT_NBIT_32(player);
		/* Set 16-bit sample precision */
		SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		/* 16/0 memory format */
		SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
		/* 32-bits per sub-frame */
		SET_UNIPERIF_I2S_FMT_NBIT_32(player);
		/* Set 24-bit sample precision */
		SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player);
		break;
	default:
		dev_err(player->dev, "format not supported");
		return -EINVAL;
	}

	/* Set parity to be calculated by the hardware */
	SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player);

	/* Set channel status bits to be inserted by the hardware */
	SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player);

	/* Set user data bits to be inserted by the hardware */
	SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player);

	/* Set validity bits to be inserted by the hardware */
	SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player);

	/* Set full software control to disabled */
	SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player);

	SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player);

	/* Update the channel status */
	uni_player_set_channel_status(player, runtime);

	/* Clear the user validity user bits */
	SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);

	/* Disable one-bit audio mode */
	SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);

	/* Enable consecutive frames repetition of Z preamble (not for HBRA) */
	SET_UNIPERIF_CONFIG_REPEAT_CHL_STS_ENABLE(player);

	/* Change to SUF0_SUBF1 and left/right channels swap! */
	SET_UNIPERIF_CONFIG_SUBFRAME_SEL_SUBF1_SUBF0(player);

	/* Set data output as MSB first */
	SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);

	if (player->stream_settings.encoding_mode ==
				UNIPERIF_IEC958_ENCODING_MODE_ENCODED)
		SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_ON(player);
	else
		SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_OFF(player);

	SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);

	/* Set rounding to off */
	SET_UNIPERIF_CTRL_ROUNDING_OFF(player);

	/* Set clock divisor */
	SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / 128);

	/* Set the spdif latency to not wait before starting player */
	SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);

	/*
	 * Ensure iec958 formatting is off. It will be enabled in function
	 * uni_player_start() at the same time as the operation
	 * mode is set to work around a silicon issue.
	 */
	if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
		SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
	else
		SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);

	return 0;
}

static int uni_player_prepare_pcm(struct uniperif *player,
				  struct snd_pcm_runtime *runtime)
{
	int output_frame_size, slot_width, clk_div;

	/* Force slot width to 32 in I2S mode (HW constraint) */
	if ((player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) ==
		SND_SOC_DAIFMT_I2S) {
		slot_width = 32;
	} else {
		switch (runtime->format) {
		case SNDRV_PCM_FORMAT_S16_LE:
			slot_width = 16;
			break;
		default:
			slot_width = 32;
			break;
		}
	}
	output_frame_size = slot_width * runtime->channels;

	clk_div = player->mclk / runtime->rate;
	/*
	 * For 32 bits subframe clk_div must be a multiple of 128,
	 * for 16 bits must be a multiple of 64
	 */
	if ((slot_width == 32) && (clk_div % 128)) {
		dev_err(player->dev, "%s: invalid clk_div", __func__);
		return -EINVAL;
	}

	if ((slot_width == 16) && (clk_div % 64)) {
		dev_err(player->dev, "%s: invalid clk_div", __func__);
		return -EINVAL;
	}

	/*
	 * Number of bits per subframe (which is one channel sample)
	 * on output - Transfer 16 or 32 bits from FIFO
	 */
	switch (slot_width) {
	case 32:
		SET_UNIPERIF_I2S_FMT_NBIT_32(player);
		SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
		break;
	case 16:
		SET_UNIPERIF_I2S_FMT_NBIT_16(player);
		SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
		break;
	default:
		dev_err(player->dev, "subframe format not supported");
		return -EINVAL;
	}

	/* Configure data memory format */
	switch (runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		/* One data word contains two samples */
		SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
		break;

	case SNDRV_PCM_FORMAT_S32_LE:
		/*
		 * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
		 * on the left than zeros (if less than 32 bytes)"... ;-)
		 */
		SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
		break;

	default:
		dev_err(player->dev, "format not supported");
		return -EINVAL;
	}

	/* Set rounding to off */
	SET_UNIPERIF_CTRL_ROUNDING_OFF(player);

	/* Set clock divisor */
	SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / (2 * output_frame_size));

	/* Number of channelsmust be even*/
	if ((runtime->channels % 2) || (runtime->channels < 2) ||
	    (runtime->channels > 10)) {
		dev_err(player->dev, "%s: invalid nb of channels", __func__);
		return -EINVAL;
	}

	SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);

	/* Set 1-bit audio format to disabled */
	SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);

	SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
	SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);

	/* No iec958 formatting as outputting to DAC  */
	SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);

	return 0;
}

/*
 * ALSA uniperipheral iec958 controls
 */
static int  uni_player_ctl_iec958_info(struct snd_kcontrol *kcontrol,
				       struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
	uinfo->count = 1;

	return 0;
}

static int uni_player_ctl_iec958_get(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;
	struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;

	mutex_lock(&player->ctrl_lock);
	ucontrol->value.iec958.status[0] = iec958->status[0];
	ucontrol->value.iec958.status[1] = iec958->status[1];
	ucontrol->value.iec958.status[2] = iec958->status[2];
	ucontrol->value.iec958.status[3] = iec958->status[3];
	mutex_unlock(&player->ctrl_lock);
	return 0;
}

static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol,
				     struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;
	struct snd_aes_iec958 *iec958 =  &player->stream_settings.iec958;

	mutex_lock(&player->ctrl_lock);
	iec958->status[0] = ucontrol->value.iec958.status[0];
	iec958->status[1] = ucontrol->value.iec958.status[1];
	iec958->status[2] = ucontrol->value.iec958.status[2];
	iec958->status[3] = ucontrol->value.iec958.status[3];
	mutex_unlock(&player->ctrl_lock);

	uni_player_set_channel_status(player, NULL);

	return 0;
}

static struct snd_kcontrol_new uni_player_iec958_ctl = {
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
	.info = uni_player_ctl_iec958_info,
	.get = uni_player_ctl_iec958_get,
	.put = uni_player_ctl_iec958_put,
};

/*
 * uniperif rate adjustement control
 */
static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol,
				       struct snd_ctl_elem_info *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 1;
	uinfo->value.integer.min = UNIPERIF_PLAYER_CLK_ADJ_MIN;
	uinfo->value.integer.max = UNIPERIF_PLAYER_CLK_ADJ_MAX;
	uinfo->value.integer.step = 1;

	return 0;
}

static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;

	mutex_lock(&player->ctrl_lock);
	ucontrol->value.integer.value[0] = player->clk_adj;
	mutex_unlock(&player->ctrl_lock);

	return 0;
}

static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol,
				      struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;
	int ret = 0;

	if ((ucontrol->value.integer.value[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN) ||
	    (ucontrol->value.integer.value[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX))
		return -EINVAL;

	mutex_lock(&player->ctrl_lock);
	player->clk_adj = ucontrol->value.integer.value[0];

	if (player->mclk)
		ret = uni_player_clk_set_rate(player, player->mclk);
	mutex_unlock(&player->ctrl_lock);

	return ret;
}

static struct snd_kcontrol_new uni_player_clk_adj_ctl = {
	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
	.name = "PCM Playback Oversampling Freq. Adjustment",
	.info = snd_sti_clk_adjustment_info,
	.get = snd_sti_clk_adjustment_get,
	.put = snd_sti_clk_adjustment_put,
};

static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = {
	&uni_player_clk_adj_ctl,
};

static struct snd_kcontrol_new *snd_sti_iec_ctl[] = {
	&uni_player_iec958_ctl,
	&uni_player_clk_adj_ctl,
};

static int uni_player_startup(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;

	player->clk_adj = 0;

	return 0;
}

static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id,
				 unsigned int freq, int dir)
{
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;
	int ret;

	if (dir == SND_SOC_CLOCK_IN)
		return 0;

	if (clk_id != 0)
		return -EINVAL;

	mutex_lock(&player->ctrl_lock);
	ret = uni_player_clk_set_rate(player, freq);
	if (!ret)
		player->mclk = freq;
	mutex_unlock(&player->ctrl_lock);

	return ret;
}

static int uni_player_prepare(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int transfer_size, trigger_limit;
	int ret;

	/* The player should be stopped */
	if (player->state != UNIPERIF_STATE_STOPPED) {
		dev_err(player->dev, "%s: invalid player state %d", __func__,
			player->state);
		return -EINVAL;
	}

	/* Calculate transfer size (in fifo cells and bytes) for frame count */
	transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;

	/* Calculate number of empty cells available before asserting DREQ */
	if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
		trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size;
	} else {
		/*
		 * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
		 * FDMA_TRIGGER_LIMIT also controls when the state switches
		 * from OFF or STANDBY to AUDIO DATA.
		 */
		trigger_limit = transfer_size;
	}

	/* Trigger limit must be an even number */
	if ((!trigger_limit % 2) || (trigger_limit != 1 && transfer_size % 2) ||
	    (trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player))) {
		dev_err(player->dev, "invalid trigger limit %d", trigger_limit);
		return -EINVAL;
	}

	SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit);

	/* Uniperipheral setup depends on player type */
	switch (player->info->player_type) {
	case SND_ST_UNIPERIF_PLAYER_TYPE_HDMI:
		ret = uni_player_prepare_iec958(player, runtime);
		break;
	case SND_ST_UNIPERIF_PLAYER_TYPE_PCM:
		ret = uni_player_prepare_pcm(player, runtime);
		break;
	case SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF:
		ret = uni_player_prepare_iec958(player, runtime);
		break;
	default:
		dev_err(player->dev, "invalid player type");
		return -EINVAL;
	}

	if (ret)
		return ret;

	switch (player->daifmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
		SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
		break;
	case SND_SOC_DAIFMT_NB_IF:
		SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
		break;
	case SND_SOC_DAIFMT_IB_NF:
		SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
		break;
	case SND_SOC_DAIFMT_IB_IF:
		SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
		SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
		break;
	}

	switch (player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
		SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player);
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
		SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player);
		SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
		break;
	default:
		dev_err(player->dev, "format not supported");
		return -EINVAL;
	}

	SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0);

	/* Reset uniperipheral player */
	SET_UNIPERIF_SOFT_RST_SOFT_RST(player);

	return reset_player(player);
}

static int uni_player_start(struct uniperif *player)
{
	int ret;

	/* The player should be stopped */
	if (player->state != UNIPERIF_STATE_STOPPED) {
		dev_err(player->dev, "%s: invalid player state", __func__);
		return -EINVAL;
	}

	ret = clk_prepare_enable(player->clk);
	if (ret) {
		dev_err(player->dev, "%s: Failed to enable clock", __func__);
		return ret;
	}

	/* Clear any pending interrupts */
	SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player));

	/* Set the interrupt mask */
	SET_UNIPERIF_ITM_BSET_DMA_ERROR(player);
	SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player);

	/* Enable underflow recovery interrupts */
	if (player->info->underflow_enabled) {
		SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player);
		SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player);
	}

	/* Reset uniperipheral player */
	SET_UNIPERIF_SOFT_RST_SOFT_RST(player);

	ret = reset_player(player);
	if (ret < 0)
		return ret;

	/*
	 * Does not use IEC61937 features of the uniperipheral hardware.
	 * Instead it performs IEC61937 in software and inserts it directly
	 * into the audio data stream. As such, when encoded mode is selected,
	 * linear pcm mode is still used, but with the differences of the
	 * channel status bits set for encoded mode and the validity bits set.
	 */
	SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player);

	/*
	 * If iec958 formatting is required for hdmi or spdif, then it must be
	 * enabled after the operation mode is set. If set prior to this, it
	 * will not take affect and hang the player.
	 */
	if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
		if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player))
				SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);

	/* Force channel status update (no update if clk disable) */
	if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
		SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
	else
		SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);

	/* Update state to started */
	player->state = UNIPERIF_STATE_STARTED;

	return 0;
}

static int uni_player_stop(struct uniperif *player)
{
	int ret;

	/* The player should not be in stopped state */
	if (player->state == UNIPERIF_STATE_STOPPED) {
		dev_err(player->dev, "%s: invalid player state", __func__);
		return -EINVAL;
	}

	/* Turn the player off */
	SET_UNIPERIF_CTRL_OPERATION_OFF(player);

	/* Soft reset the player */
	SET_UNIPERIF_SOFT_RST_SOFT_RST(player);

	ret = reset_player(player);
	if (ret < 0)
		return ret;

	/* Disable interrupts */
	SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player));

	/* Disable clock */
	clk_disable_unprepare(player->clk);

	/* Update state to stopped and return */
	player->state = UNIPERIF_STATE_STOPPED;

	return 0;
}

int uni_player_resume(struct uniperif *player)
{
	int ret;

	/* Select the frequency synthesizer clock */
	if (player->clk_sel) {
		ret = regmap_field_write(player->clk_sel, 1);
		if (ret) {
			dev_err(player->dev,
				"%s: Failed to select freq synth clock",
				__func__);
			return ret;
		}
	}

	SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
	SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
	SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
	SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);

	return 0;
}
EXPORT_SYMBOL_GPL(uni_player_resume);

static int uni_player_trigger(struct snd_pcm_substream *substream,
			      int cmd, struct snd_soc_dai *dai)
{
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		return uni_player_start(player);
	case SNDRV_PCM_TRIGGER_STOP:
		return uni_player_stop(player);
	case SNDRV_PCM_TRIGGER_RESUME:
		return uni_player_resume(player);
	default:
		return -EINVAL;
	}
}

static void uni_player_shutdown(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
	struct uniperif *player = priv->dai_data.uni;

	if (player->state != UNIPERIF_STATE_STOPPED)
		/* Stop the player */
		uni_player_stop(player);
}

static int uni_player_parse_dt_clk_glue(struct platform_device *pdev,
					struct uniperif *player)
{
	int bit_offset;
	struct device_node *node = pdev->dev.of_node;
	struct regmap *regmap;

	bit_offset = SYS_CFG_AUDI0_GLUE_PCM_CLKX + player->info->id;

	regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg");

	if (regmap) {
		struct reg_field regfield =
			REG_FIELD(SYS_CFG_AUDIO_GLUE, bit_offset, bit_offset);

		player->clk_sel = regmap_field_alloc(regmap, regfield);
	} else {
		dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n");
		return -EINVAL;
	}

	return 0;
}

static int uni_player_parse_dt(struct platform_device *pdev,
			       struct uniperif *player)
{
	struct uniperif_info *info;
	struct device *dev = &pdev->dev;
	struct device_node *pnode = pdev->dev.of_node;
	const char *mode;

	/* Allocate memory for the info structure */
	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	of_property_read_u32(pnode, "version", &player->ver);
	if (player->ver == SND_ST_UNIPERIF_VERSION_UNKNOWN) {
		dev_err(dev, "Unknown uniperipheral version ");
		return -EINVAL;
	}
	/* Underflow recovery is only supported on later ip revisions */
	if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
		info->underflow_enabled = 1;

	of_property_read_u32(pnode, "uniperiph-id", &info->id);

	/* Read the device mode property */
	of_property_read_string(pnode, "mode", &mode);

	if (strcasecmp(mode, "hdmi") == 0)
		info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_HDMI;
	else if (strcasecmp(mode, "pcm") == 0)
		info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_PCM;
	else if (strcasecmp(mode, "spdif") == 0)
		info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_SPDIF;
	else
		info->player_type = SND_ST_UNIPERIF_PLAYER_TYPE_NONE;

	/* Save the info structure */
	player->info = info;

	/* Get the PCM_CLK_SEL bit from audio-glue-ctrl SoC register */
	if (uni_player_parse_dt_clk_glue(pdev, player))
		return -EINVAL;

	return 0;
}

static const struct snd_soc_dai_ops uni_player_dai_ops = {
		.startup = uni_player_startup,
		.shutdown = uni_player_shutdown,
		.prepare = uni_player_prepare,
		.trigger = uni_player_trigger,
		.hw_params = sti_uniperiph_dai_hw_params,
		.set_fmt = sti_uniperiph_dai_set_fmt,
		.set_sysclk = uni_player_set_sysclk
};

int uni_player_init(struct platform_device *pdev,
		    struct uniperif *player)
{
	int ret = 0;

	player->dev = &pdev->dev;
	player->state = UNIPERIF_STATE_STOPPED;
	player->hw = &uni_player_pcm_hw;
	player->dai_ops = &uni_player_dai_ops;

	ret = uni_player_parse_dt(pdev, player);

	if (ret < 0) {
		dev_err(player->dev, "Failed to parse DeviceTree");
		return ret;
	}

	/* Get uniperif resource */
	player->clk = of_clk_get(pdev->dev.of_node, 0);
	if (IS_ERR(player->clk))
		ret = PTR_ERR(player->clk);

	/* Select the frequency synthesizer clock */
	if (player->clk_sel) {
		ret = regmap_field_write(player->clk_sel, 1);
		if (ret) {
			dev_err(player->dev,
				"%s: Failed to select freq synth clock",
				__func__);
			return ret;
		}
	}

	ret = devm_request_irq(&pdev->dev, player->irq,
			       uni_player_irq_handler, IRQF_SHARED,
			       dev_name(&pdev->dev), player);
	if (ret < 0)
		return ret;

	mutex_init(&player->ctrl_lock);

	/* Ensure that disabled by default */
	SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
	SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
	SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
	SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);

	if (UNIPERIF_PLAYER_TYPE_IS_IEC958(player)) {
		/* Set default iec958 status bits  */

		/* Consumer, PCM, copyright, 2ch, mode 0 */
		player->stream_settings.iec958.status[0] = 0x00;
		/* Broadcast reception category */
		player->stream_settings.iec958.status[1] =
					IEC958_AES1_CON_GENERAL;
		/* Do not take into account source or channel number */
		player->stream_settings.iec958.status[2] =
					IEC958_AES2_CON_SOURCE_UNSPEC;
		/* Sampling frequency not indicated */
		player->stream_settings.iec958.status[3] =
					IEC958_AES3_CON_FS_NOTID;
		/* Max sample word 24-bit, sample word length not indicated */
		player->stream_settings.iec958.status[4] =
					IEC958_AES4_CON_MAX_WORDLEN_24 |
					IEC958_AES4_CON_WORDLEN_24_20;

		player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl);
		player->snd_ctrls = snd_sti_iec_ctl[0];
	} else {
		player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl);
		player->snd_ctrls = snd_sti_pcm_ctl[0];
	}

	return 0;
}
EXPORT_SYMBOL_GPL(uni_player_init);
OpenPOWER on IntegriCloud