summaryrefslogtreecommitdiffstats
path: root/sound/soc/intel/sst-haswell-pcm.c
blob: 058efb17c568a83c1f665d4c3cf6bb62bb70f196 (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
/*
 * Intel SST Haswell/Broadwell PCM Support
 *
 * Copyright (C) 2013, Intel Corporation. All rights reserved.
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/compress_driver.h>

#include "sst-haswell-ipc.h"
#include "sst-dsp-priv.h"
#include "sst-dsp.h"

#define HSW_PCM_COUNT		6
#define HSW_VOLUME_MAX		0x7FFFFFFF	/* 0dB */

/* simple volume table */
static const u32 volume_map[] = {
	HSW_VOLUME_MAX >> 30,
	HSW_VOLUME_MAX >> 29,
	HSW_VOLUME_MAX >> 28,
	HSW_VOLUME_MAX >> 27,
	HSW_VOLUME_MAX >> 26,
	HSW_VOLUME_MAX >> 25,
	HSW_VOLUME_MAX >> 24,
	HSW_VOLUME_MAX >> 23,
	HSW_VOLUME_MAX >> 22,
	HSW_VOLUME_MAX >> 21,
	HSW_VOLUME_MAX >> 20,
	HSW_VOLUME_MAX >> 19,
	HSW_VOLUME_MAX >> 18,
	HSW_VOLUME_MAX >> 17,
	HSW_VOLUME_MAX >> 16,
	HSW_VOLUME_MAX >> 15,
	HSW_VOLUME_MAX >> 14,
	HSW_VOLUME_MAX >> 13,
	HSW_VOLUME_MAX >> 12,
	HSW_VOLUME_MAX >> 11,
	HSW_VOLUME_MAX >> 10,
	HSW_VOLUME_MAX >> 9,
	HSW_VOLUME_MAX >> 8,
	HSW_VOLUME_MAX >> 7,
	HSW_VOLUME_MAX >> 6,
	HSW_VOLUME_MAX >> 5,
	HSW_VOLUME_MAX >> 4,
	HSW_VOLUME_MAX >> 3,
	HSW_VOLUME_MAX >> 2,
	HSW_VOLUME_MAX >> 1,
	HSW_VOLUME_MAX >> 0,
};

#define HSW_PCM_PERIODS_MAX	64
#define HSW_PCM_PERIODS_MIN	2

static const struct snd_pcm_hardware hsw_pcm_hardware = {
	.info			= SNDRV_PCM_INFO_MMAP |
				  SNDRV_PCM_INFO_MMAP_VALID |
				  SNDRV_PCM_INFO_INTERLEAVED |
				  SNDRV_PCM_INFO_PAUSE |
				  SNDRV_PCM_INFO_RESUME |
				  SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
	.formats		= SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FORMAT_S24_LE |
				  SNDRV_PCM_FMTBIT_S32_LE,
	.period_bytes_min	= PAGE_SIZE,
	.period_bytes_max	= (HSW_PCM_PERIODS_MAX / HSW_PCM_PERIODS_MIN) * PAGE_SIZE,
	.periods_min		= HSW_PCM_PERIODS_MIN,
	.periods_max		= HSW_PCM_PERIODS_MAX,
	.buffer_bytes_max	= HSW_PCM_PERIODS_MAX * PAGE_SIZE,
};

/* private data for each PCM DSP stream */
struct hsw_pcm_data {
	int dai_id;
	struct sst_hsw_stream *stream;
	u32 volume[2];
	struct snd_pcm_substream *substream;
	struct snd_compr_stream *cstream;
	unsigned int wpos;
	struct mutex mutex;
	bool allocated;
};

/* private data for the driver */
struct hsw_priv_data {
	/* runtime DSP */
	struct sst_hsw *hsw;

	/* page tables */
	struct snd_dma_buffer dmab[HSW_PCM_COUNT][2];

	/* DAI data */
	struct hsw_pcm_data pcm[HSW_PCM_COUNT];
};

static u32 hsw_notify_pointer(struct sst_hsw_stream *stream, void *data);

static inline u32 hsw_mixer_to_ipc(unsigned int value)
{
	if (value >= ARRAY_SIZE(volume_map))
		return volume_map[0];
	else
		return volume_map[value];
}

static inline unsigned int hsw_ipc_to_mixer(u32 value)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(volume_map); i++) {
		if (volume_map[i] >= value)
			return i;
	}

	return i - 1;
}

static int hsw_stream_volume_put(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_platform *platform = snd_soc_kcontrol_platform(kcontrol);
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(platform);
	struct hsw_pcm_data *pcm_data = &pdata->pcm[mc->reg];
	struct sst_hsw *hsw = pdata->hsw;
	u32 volume;

	mutex_lock(&pcm_data->mutex);

	if (!pcm_data->stream) {
		pcm_data->volume[0] =
			hsw_mixer_to_ipc(ucontrol->value.integer.value[0]);
		pcm_data->volume[1] =
			hsw_mixer_to_ipc(ucontrol->value.integer.value[1]);
		mutex_unlock(&pcm_data->mutex);
		return 0;
	}

	if (ucontrol->value.integer.value[0] ==
		ucontrol->value.integer.value[1]) {
		volume = hsw_mixer_to_ipc(ucontrol->value.integer.value[0]);
		sst_hsw_stream_set_volume(hsw, pcm_data->stream, 0, 2, volume);
	} else {
		volume = hsw_mixer_to_ipc(ucontrol->value.integer.value[0]);
		sst_hsw_stream_set_volume(hsw, pcm_data->stream, 0, 0, volume);
		volume = hsw_mixer_to_ipc(ucontrol->value.integer.value[1]);
		sst_hsw_stream_set_volume(hsw, pcm_data->stream, 0, 1, volume);
	}

	mutex_unlock(&pcm_data->mutex);
	return 0;
}

static int hsw_stream_volume_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_platform *platform = snd_soc_kcontrol_platform(kcontrol);
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(platform);
	struct hsw_pcm_data *pcm_data = &pdata->pcm[mc->reg];
	struct sst_hsw *hsw = pdata->hsw;
	u32 volume;

	mutex_lock(&pcm_data->mutex);

	if (!pcm_data->stream) {
		ucontrol->value.integer.value[0] =
			hsw_ipc_to_mixer(pcm_data->volume[0]);
		ucontrol->value.integer.value[1] =
			hsw_ipc_to_mixer(pcm_data->volume[1]);
		mutex_unlock(&pcm_data->mutex);
		return 0;
	}

	sst_hsw_stream_get_volume(hsw, pcm_data->stream, 0, 0, &volume);
	ucontrol->value.integer.value[0] = hsw_ipc_to_mixer(volume);
	sst_hsw_stream_get_volume(hsw, pcm_data->stream, 0, 1, &volume);
	ucontrol->value.integer.value[1] = hsw_ipc_to_mixer(volume);
	mutex_unlock(&pcm_data->mutex);

	return 0;
}

static int hsw_volume_put(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_platform *platform = snd_soc_kcontrol_platform(kcontrol);
	struct hsw_priv_data *pdata = snd_soc_platform_get_drvdata(platform);
	struct sst_hsw *hsw = pdata->hsw;
	u32 volume;

	if (ucontrol->value.integer.value[0] ==
		ucontrol->value.integer.value[1]) {

		volume = hsw_mixer_to_ipc(ucontrol->value.integer.value[0]);
		sst_hsw_mixer_set_volume(hsw, 0, 2, volume);

	} else {
		volume = hsw_mixer_to_ipc(ucontrol->value.integer.value[0]);
		sst_hsw_mixer_set_volume(hsw, 0, 0, volume);

		volume = hsw_mixer_to_ipc(ucontrol->value.integer.value[1]);
		sst_hsw_mixer_set_volume(hsw, 0, 1, volume);
	}

	return 0;
}

static int hsw_volume_get(struct snd_kcontrol *kcontrol,
				struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_platform *platform = snd_soc_kcontrol_platform(kcontrol);
	struct hsw_priv_data *pdata = snd_soc_platform_get_drvdata(platform);
	struct sst_hsw *hsw = pdata->hsw;
	unsigned int volume = 0;

	sst_hsw_mixer_get_volume(hsw, 0, 0, &volume);
	ucontrol->value.integer.value[0] = hsw_ipc_to_mixer(volume);

	sst_hsw_mixer_get_volume(hsw, 0, 1, &volume);
	ucontrol->value.integer.value[1] = hsw_ipc_to_mixer(volume);

	return 0;
}

/* TLV used by both global and stream volumes */
static const DECLARE_TLV_DB_SCALE(hsw_vol_tlv, -9000, 300, 1);

/* System Pin has no volume control */
static const struct snd_kcontrol_new hsw_volume_controls[] = {
	/* Global DSP volume */
	SOC_DOUBLE_EXT_TLV("Master Playback Volume", 0, 0, 8,
		ARRAY_SIZE(volume_map) -1, 0,
		hsw_volume_get, hsw_volume_put, hsw_vol_tlv),
	/* Offload 0 volume */
	SOC_DOUBLE_EXT_TLV("Media0 Playback Volume", 1, 0, 8,
		ARRAY_SIZE(volume_map), 0,
		hsw_stream_volume_get, hsw_stream_volume_put, hsw_vol_tlv),
	/* Offload 1 volume */
	SOC_DOUBLE_EXT_TLV("Media1 Playback Volume", 2, 0, 8,
		ARRAY_SIZE(volume_map), 0,
		hsw_stream_volume_get, hsw_stream_volume_put, hsw_vol_tlv),
	/* Loopback volume */
	SOC_DOUBLE_EXT_TLV("Loopback Capture Volume", 3, 0, 8,
		ARRAY_SIZE(volume_map), 0,
		hsw_stream_volume_get, hsw_stream_volume_put, hsw_vol_tlv),
	/* Mic Capture volume */
	SOC_DOUBLE_EXT_TLV("Mic Capture Volume", 4, 0, 8,
		ARRAY_SIZE(volume_map), 0,
		hsw_stream_volume_get, hsw_stream_volume_put, hsw_vol_tlv),
};

/* Create DMA buffer page table for DSP */
static int create_adsp_page_table(struct snd_pcm_substream *substream,
	struct hsw_priv_data *pdata, struct snd_soc_pcm_runtime *rtd,
	unsigned char *dma_area, size_t size, int pcm)
{
	struct snd_dma_buffer *dmab = snd_pcm_get_dma_buf(substream);
	int i, pages, stream = substream->stream;

	pages = snd_sgbuf_aligned_pages(size);

	dev_dbg(rtd->dev, "generating page table for %p size 0x%zu pages %d\n",
		dma_area, size, pages);

	for (i = 0; i < pages; i++) {
		u32 idx = (((i << 2) + i)) >> 1;
		u32 pfn = snd_sgbuf_get_addr(dmab, i * PAGE_SIZE) >> PAGE_SHIFT;
		u32 *pg_table;

		dev_dbg(rtd->dev, "pfn i %i idx %d pfn %x\n", i, idx, pfn);

		pg_table = (u32 *)(pdata->dmab[pcm][stream].area + idx);

		if (i & 1)
			*pg_table |= (pfn << 4);
		else
			*pg_table |= pfn;
	}

	return 0;
}

/* this may get called several times by oss emulation */
static int hsw_pcm_hw_params(struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(rtd->platform);
	struct hsw_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd);
	struct sst_hsw *hsw = pdata->hsw;
	struct sst_module *module_data;
	struct sst_dsp *dsp;
	struct snd_dma_buffer *dmab;
	enum sst_hsw_stream_type stream_type;
	enum sst_hsw_stream_path_id path_id;
	u32 rate, bits, map, pages, module_id;
	u8 channels;
	int ret;

	/* check if we are being called a subsequent time */
	if (pcm_data->allocated) {
		ret = sst_hsw_stream_reset(hsw, pcm_data->stream);
		if (ret < 0)
			dev_dbg(rtd->dev, "error: reset stream failed %d\n",
				ret);

		ret = sst_hsw_stream_free(hsw, pcm_data->stream);
		if (ret < 0) {
			dev_dbg(rtd->dev, "error: free stream failed %d\n",
				ret);
			return ret;
		}
		pcm_data->allocated = false;

		pcm_data->stream = sst_hsw_stream_new(hsw, rtd->cpu_dai->id,
			hsw_notify_pointer, pcm_data);
		if (pcm_data->stream == NULL) {
			dev_err(rtd->dev, "error: failed to create stream\n");
			return -EINVAL;
		}
	}

	/* stream direction */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		path_id = SST_HSW_STREAM_PATH_SSP0_OUT;
	else
		path_id = SST_HSW_STREAM_PATH_SSP0_IN;

	/* DSP stream type depends on DAI ID */
	switch (rtd->cpu_dai->id) {
	case 0:
		stream_type = SST_HSW_STREAM_TYPE_SYSTEM;
		module_id = SST_HSW_MODULE_PCM_SYSTEM;
		break;
	case 1:
	case 2:
		stream_type = SST_HSW_STREAM_TYPE_RENDER;
		module_id = SST_HSW_MODULE_PCM;
		break;
	case 3:
		/* path ID needs to be OUT for loopback */
		stream_type = SST_HSW_STREAM_TYPE_LOOPBACK;
		path_id = SST_HSW_STREAM_PATH_SSP0_OUT;
		module_id = SST_HSW_MODULE_PCM_REFERENCE;
		break;
	case 4:
		stream_type = SST_HSW_STREAM_TYPE_CAPTURE;
		module_id = SST_HSW_MODULE_PCM_CAPTURE;
		break;
	default:
		dev_err(rtd->dev, "error: invalid DAI ID %d\n",
			rtd->cpu_dai->id);
		return -EINVAL;
	};

	ret = sst_hsw_stream_format(hsw, pcm_data->stream,
		path_id, stream_type, SST_HSW_STREAM_FORMAT_PCM_FORMAT);
	if (ret < 0) {
		dev_err(rtd->dev, "error: failed to set format %d\n", ret);
		return ret;
	}

	rate = params_rate(params);
	ret = sst_hsw_stream_set_rate(hsw, pcm_data->stream, rate);
	if (ret < 0) {
		dev_err(rtd->dev, "error: could not set rate %d\n", rate);
		return ret;
	}

	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		bits = SST_HSW_DEPTH_16BIT;
		sst_hsw_stream_set_valid(hsw, pcm_data->stream, 16);
		break;
	case SNDRV_PCM_FORMAT_S24_LE:
		bits = SST_HSW_DEPTH_24BIT;
		sst_hsw_stream_set_valid(hsw, pcm_data->stream, 32);
		break;
	default:
		dev_err(rtd->dev, "error: invalid format %d\n",
			params_format(params));
		return -EINVAL;
	}

	ret = sst_hsw_stream_set_bits(hsw, pcm_data->stream, bits);
	if (ret < 0) {
		dev_err(rtd->dev, "error: could not set bits %d\n", bits);
		return ret;
	}

	/* we only support stereo atm */
	channels = params_channels(params);
	if (channels != 2) {
		dev_err(rtd->dev, "error: invalid channels %d\n", channels);
		return -EINVAL;
	}

	map = create_channel_map(SST_HSW_CHANNEL_CONFIG_STEREO);
	sst_hsw_stream_set_map_config(hsw, pcm_data->stream,
			map, SST_HSW_CHANNEL_CONFIG_STEREO);

	ret = sst_hsw_stream_set_channels(hsw, pcm_data->stream, channels);
	if (ret < 0) {
		dev_err(rtd->dev, "error: could not set channels %d\n",
			channels);
		return ret;
	}

	ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	if (ret < 0) {
		dev_err(rtd->dev, "error: could not allocate %d bytes for PCM %d\n",
			params_buffer_bytes(params), ret);
		return ret;
	}

	dmab = snd_pcm_get_dma_buf(substream);

	ret = create_adsp_page_table(substream, pdata, rtd, runtime->dma_area,
		runtime->dma_bytes, rtd->cpu_dai->id);
	if (ret < 0)
		return ret;

	sst_hsw_stream_set_style(hsw, pcm_data->stream,
		SST_HSW_INTERLEAVING_PER_CHANNEL);

	if (runtime->dma_bytes % PAGE_SIZE)
		pages = (runtime->dma_bytes / PAGE_SIZE) + 1;
	else
		pages = runtime->dma_bytes / PAGE_SIZE;

	ret = sst_hsw_stream_buffer(hsw, pcm_data->stream,
		pdata->dmab[rtd->cpu_dai->id][substream->stream].addr,
		pages, runtime->dma_bytes, 0,
		snd_sgbuf_get_addr(dmab, 0) >> PAGE_SHIFT);
	if (ret < 0) {
		dev_err(rtd->dev, "error: failed to set DMA buffer %d\n", ret);
		return ret;
	}

	dsp = sst_hsw_get_dsp(hsw);

	module_data = sst_module_get_from_id(dsp, module_id);
	if (module_data == NULL) {
		dev_err(rtd->dev, "error: failed to get module config\n");
		return -EINVAL;
	}

	/* we use hardcoded memory offsets atm, will be updated for new FW */
	if (stream_type == SST_HSW_STREAM_TYPE_CAPTURE) {
		sst_hsw_stream_set_module_info(hsw, pcm_data->stream,
			SST_HSW_MODULE_PCM_CAPTURE, module_data->entry);
		sst_hsw_stream_set_pmemory_info(hsw, pcm_data->stream,
			0x449400, 0x4000);
		sst_hsw_stream_set_smemory_info(hsw, pcm_data->stream,
			0x400000, 0);
	} else { /* stream_type == SST_HSW_STREAM_TYPE_SYSTEM */
		sst_hsw_stream_set_module_info(hsw, pcm_data->stream,
			SST_HSW_MODULE_PCM_SYSTEM, module_data->entry);

		sst_hsw_stream_set_pmemory_info(hsw, pcm_data->stream,
			module_data->offset, module_data->size);
		sst_hsw_stream_set_pmemory_info(hsw, pcm_data->stream,
			0x44d400, 0x3800);

		sst_hsw_stream_set_smemory_info(hsw, pcm_data->stream,
			module_data->offset, module_data->size);
		sst_hsw_stream_set_smemory_info(hsw, pcm_data->stream,
			0x400000, 0);
	}

	ret = sst_hsw_stream_commit(hsw, pcm_data->stream);
	if (ret < 0) {
		dev_err(rtd->dev, "error: failed to commit stream %d\n", ret);
		return ret;
	}
	pcm_data->allocated = true;

	ret = sst_hsw_stream_pause(hsw, pcm_data->stream, 1);
	if (ret < 0)
		dev_err(rtd->dev, "error: failed to pause %d\n", ret);

	return 0;
}

static int hsw_pcm_hw_free(struct snd_pcm_substream *substream)
{
	snd_pcm_lib_free_pages(substream);
	return 0;
}

static int hsw_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(rtd->platform);
	struct hsw_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd);
	struct sst_hsw *hsw = pdata->hsw;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		sst_hsw_stream_resume(hsw, pcm_data->stream, 0);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		sst_hsw_stream_pause(hsw, pcm_data->stream, 0);
		break;
	default:
		break;
	}

	return 0;
}

static u32 hsw_notify_pointer(struct sst_hsw_stream *stream, void *data)
{
	struct hsw_pcm_data *pcm_data = data;
	struct snd_pcm_substream *substream = pcm_data->substream;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	u32 pos;

	pos = frames_to_bytes(runtime,
		(runtime->control->appl_ptr % runtime->buffer_size));

	dev_dbg(rtd->dev, "PCM: App pointer %d bytes\n", pos);

	/* let alsa know we have play a period */
	snd_pcm_period_elapsed(substream);
	return pos;
}

static snd_pcm_uframes_t hsw_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(rtd->platform);
	struct hsw_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd);
	struct sst_hsw *hsw = pdata->hsw;
	snd_pcm_uframes_t offset;
	uint64_t ppos;
	u32 position = sst_hsw_get_dsp_position(hsw, pcm_data->stream);

	offset = bytes_to_frames(runtime, position);
	ppos = sst_hsw_get_dsp_presentation_position(hsw, pcm_data->stream);

	dev_dbg(rtd->dev, "PCM: DMA pointer %du bytes, pos %llu\n",
		position, ppos);
	return offset;
}

static int hsw_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(rtd->platform);
	struct hsw_pcm_data *pcm_data;
	struct sst_hsw *hsw = pdata->hsw;

	pcm_data = &pdata->pcm[rtd->cpu_dai->id];

	mutex_lock(&pcm_data->mutex);

	snd_soc_pcm_set_drvdata(rtd, pcm_data);
	pcm_data->substream = substream;

	snd_soc_set_runtime_hwparams(substream, &hsw_pcm_hardware);

	pcm_data->stream = sst_hsw_stream_new(hsw, rtd->cpu_dai->id,
		hsw_notify_pointer, pcm_data);
	if (pcm_data->stream == NULL) {
		dev_err(rtd->dev, "error: failed to create stream\n");
		mutex_unlock(&pcm_data->mutex);
		return -EINVAL;
	}

	/* Set previous saved volume */
	sst_hsw_stream_set_volume(hsw, pcm_data->stream, 0,
			0, pcm_data->volume[0]);
	sst_hsw_stream_set_volume(hsw, pcm_data->stream, 0,
			1, pcm_data->volume[1]);

	mutex_unlock(&pcm_data->mutex);
	return 0;
}

static int hsw_pcm_close(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct hsw_priv_data *pdata =
		snd_soc_platform_get_drvdata(rtd->platform);
	struct hsw_pcm_data *pcm_data = snd_soc_pcm_get_drvdata(rtd);
	struct sst_hsw *hsw = pdata->hsw;
	int ret;

	mutex_lock(&pcm_data->mutex);
	ret = sst_hsw_stream_reset(hsw, pcm_data->stream);
	if (ret < 0) {
		dev_dbg(rtd->dev, "error: reset stream failed %d\n", ret);
		goto out;
	}

	ret = sst_hsw_stream_free(hsw, pcm_data->stream);
	if (ret < 0) {
		dev_dbg(rtd->dev, "error: free stream failed %d\n", ret);
		goto out;
	}
	pcm_data->allocated = 0;
	pcm_data->stream = NULL;

out:
	mutex_unlock(&pcm_data->mutex);
	return ret;
}

static struct snd_pcm_ops hsw_pcm_ops = {
	.open		= hsw_pcm_open,
	.close		= hsw_pcm_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= hsw_pcm_hw_params,
	.hw_free	= hsw_pcm_hw_free,
	.trigger	= hsw_pcm_trigger,
	.pointer	= hsw_pcm_pointer,
	.page		= snd_pcm_sgbuf_ops_page,
};

static void hsw_pcm_free(struct snd_pcm *pcm)
{
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static int hsw_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_pcm *pcm = rtd->pcm;
	struct snd_soc_platform *platform = rtd->platform;
	struct sst_pdata *pdata = dev_get_platdata(platform->dev);
	struct device *dev = pdata->dma_dev;
	int ret = 0;

	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
			pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
		ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
			SNDRV_DMA_TYPE_DEV_SG,
			dev,
			hsw_pcm_hardware.buffer_bytes_max,
			hsw_pcm_hardware.buffer_bytes_max);
		if (ret) {
			dev_err(rtd->dev, "dma buffer allocation failed %d\n",
				ret);
			return ret;
		}
	}

	return ret;
}

#define HSW_FORMATS \
	(SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S16_LE |\
	 SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_soc_dai_driver hsw_dais[] = {
	{
		.name  = "System Pin",
		.playback = {
			.stream_name = "System Playback",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_48000,
			.formats = SNDRV_PCM_FMTBIT_S16_LE,
		},
	},
	{
		/* PCM */
		.name  = "Offload0 Pin",
		.playback = {
			.stream_name = "Offload0 Playback",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_192000,
			.formats = HSW_FORMATS,
		},
	},
	{
		/* PCM */
		.name  = "Offload1 Pin",
		.playback = {
			.stream_name = "Offload1 Playback",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_192000,
			.formats = HSW_FORMATS,
		},
	},
	{
		.name  = "Loopback Pin",
		.capture = {
			.stream_name = "Loopback Capture",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_192000,
			.formats = HSW_FORMATS,
		},
	},
	{
		.name  = "Capture Pin",
		.capture = {
			.stream_name = "Analog Capture",
			.channels_min = 2,
			.channels_max = 2,
			.rates = SNDRV_PCM_RATE_8000_192000,
			.formats = HSW_FORMATS,
		},
	},
};

static const struct snd_soc_dapm_widget widgets[] = {

	/* Backend DAIs  */
	SND_SOC_DAPM_AIF_IN("SSP0 CODEC IN", NULL, 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("SSP0 CODEC OUT", NULL, 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_IN("SSP1 BT IN", NULL, 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_OUT("SSP1 BT OUT", NULL, 0, SND_SOC_NOPM, 0, 0),

	/* Global Playback Mixer */
	SND_SOC_DAPM_MIXER("Playback VMixer", SND_SOC_NOPM, 0, 0, NULL, 0),
};

static const struct snd_soc_dapm_route graph[] = {

	/* Playback Mixer */
	{"Playback VMixer", NULL, "System Playback"},
	{"Playback VMixer", NULL, "Offload0 Playback"},
	{"Playback VMixer", NULL, "Offload1 Playback"},

	{"SSP0 CODEC OUT", NULL, "Playback VMixer"},

	{"Analog Capture", NULL, "SSP0 CODEC IN"},
};

static int hsw_pcm_probe(struct snd_soc_platform *platform)
{
	struct sst_pdata *pdata = dev_get_platdata(platform->dev);
	struct hsw_priv_data *priv_data;
	struct device *dma_dev;
	int i, ret = 0;

	if (!pdata)
		return -ENODEV;

	dma_dev = pdata->dma_dev;

	priv_data = devm_kzalloc(platform->dev, sizeof(*priv_data), GFP_KERNEL);
	priv_data->hsw = pdata->dsp;
	snd_soc_platform_set_drvdata(platform, priv_data);

	/* allocate DSP buffer page tables */
	for (i = 0; i < ARRAY_SIZE(hsw_dais); i++) {

		mutex_init(&priv_data->pcm[i].mutex);

		/* playback */
		if (hsw_dais[i].playback.channels_min) {
			ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dma_dev,
				PAGE_SIZE, &priv_data->dmab[i][0]);
			if (ret < 0)
				goto err;
		}

		/* capture */
		if (hsw_dais[i].capture.channels_min) {
			ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, dma_dev,
				PAGE_SIZE, &priv_data->dmab[i][1]);
			if (ret < 0)
				goto err;
		}
	}

	return 0;

err:
	for (;i >= 0; i--) {
		if (hsw_dais[i].playback.channels_min)
			snd_dma_free_pages(&priv_data->dmab[i][0]);
		if (hsw_dais[i].capture.channels_min)
			snd_dma_free_pages(&priv_data->dmab[i][1]);
	}
	return ret;
}

static int hsw_pcm_remove(struct snd_soc_platform *platform)
{
	struct hsw_priv_data *priv_data =
		snd_soc_platform_get_drvdata(platform);
	int i;

	for (i = 0; i < ARRAY_SIZE(hsw_dais); i++) {
		if (hsw_dais[i].playback.channels_min)
			snd_dma_free_pages(&priv_data->dmab[i][0]);
		if (hsw_dais[i].capture.channels_min)
			snd_dma_free_pages(&priv_data->dmab[i][1]);
	}

	return 0;
}

static struct snd_soc_platform_driver hsw_soc_platform = {
	.probe		= hsw_pcm_probe,
	.remove		= hsw_pcm_remove,
	.ops		= &hsw_pcm_ops,
	.pcm_new	= hsw_pcm_new,
	.pcm_free	= hsw_pcm_free,
	.controls	= hsw_volume_controls,
	.num_controls	= ARRAY_SIZE(hsw_volume_controls),
	.dapm_widgets	= widgets,
	.num_dapm_widgets	= ARRAY_SIZE(widgets),
	.dapm_routes	= graph,
	.num_dapm_routes	= ARRAY_SIZE(graph),
};

static const struct snd_soc_component_driver hsw_dai_component = {
	.name		= "haswell-dai",
};

static int hsw_pcm_dev_probe(struct platform_device *pdev)
{
	struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
	int ret;

	ret = sst_hsw_dsp_init(&pdev->dev, sst_pdata);
	if (ret < 0)
		return -ENODEV;

	ret = snd_soc_register_platform(&pdev->dev, &hsw_soc_platform);
	if (ret < 0)
		goto err_plat;

	ret = snd_soc_register_component(&pdev->dev, &hsw_dai_component,
		hsw_dais, ARRAY_SIZE(hsw_dais));
	if (ret < 0)
		goto err_comp;

	return 0;

err_comp:
	snd_soc_unregister_platform(&pdev->dev);
err_plat:
	sst_hsw_dsp_free(&pdev->dev, sst_pdata);
	return 0;
}

static int hsw_pcm_dev_remove(struct platform_device *pdev)
{
	struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);

	snd_soc_unregister_platform(&pdev->dev);
	snd_soc_unregister_component(&pdev->dev);
	sst_hsw_dsp_free(&pdev->dev, sst_pdata);

	return 0;
}

static struct platform_driver hsw_pcm_driver = {
	.driver = {
		.name = "haswell-pcm-audio",
		.owner = THIS_MODULE,
	},

	.probe = hsw_pcm_dev_probe,
	.remove = hsw_pcm_dev_remove,
};
module_platform_driver(hsw_pcm_driver);

MODULE_AUTHOR("Liam Girdwood, Xingchao Wang");
MODULE_DESCRIPTION("Haswell/Lynxpoint + Broadwell/Wildcatpoint PCM");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:haswell-pcm-audio");