summaryrefslogtreecommitdiff
path: root/sound/soc/intel/atom/sst/sst_drv_interface.c
blob: 6a8b253c58d254e9cdaf754747801dc3e1c4efb1 (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
/*
 *  sst_drv_interface.c - Intel SST Driver for audio engine
 *
 *  Copyright (C) 2008-14 Intel Corp
 *  Authors:	Vinod Koul <vinod.koul@intel.com>
 *		Harsha Priya <priya.harsha@intel.com>
 *		Dharageswari R <dharageswari.r@intel.com)
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  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/delay.h>
#include <linux/pci.h>
#include <linux/fs.h>
#include <linux/firmware.h>
#include <linux/pm_runtime.h>
#include <linux/pm_qos.h>
#include <linux/math64.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/compress_driver.h>
#include <asm/platform_sst_audio.h>
#include "../sst-mfld-platform.h"
#include "sst.h"
#include "../../common/sst-dsp.h"



#define NUM_CODEC 2
#define MIN_FRAGMENT 2
#define MAX_FRAGMENT 4
#define MIN_FRAGMENT_SIZE (50 * 1024)
#define MAX_FRAGMENT_SIZE (1024 * 1024)
#define SST_GET_BYTES_PER_SAMPLE(pcm_wd_sz)  (((pcm_wd_sz + 15) >> 4) << 1)
#ifdef CONFIG_PM
#define GET_USAGE_COUNT(dev) (atomic_read(&dev->power.usage_count))
#else
#define GET_USAGE_COUNT(dev) 1
#endif

int free_stream_context(struct intel_sst_drv *ctx, unsigned int str_id)
{
	struct stream_info *stream;
	int ret = 0;

	stream = get_stream_info(ctx, str_id);
	if (stream) {
		/* str_id is valid, so stream is alloacted */
		ret = sst_free_stream(ctx, str_id);
		if (ret)
			sst_clean_stream(&ctx->streams[str_id]);
		return ret;
	} else {
		dev_err(ctx->dev, "we tried to free stream context %d which was freed!!!\n", str_id);
	}
	return ret;
}

int sst_get_stream_allocated(struct intel_sst_drv *ctx,
	struct snd_sst_params *str_param,
	struct snd_sst_lib_download **lib_dnld)
{
	int retval;

	retval = ctx->ops->alloc_stream(ctx, str_param);
	if (retval > 0)
		dev_dbg(ctx->dev, "Stream allocated %d\n", retval);
	return retval;

}

/*
 * sst_get_sfreq - this function returns the frequency of the stream
 *
 * @str_param : stream params
 */
int sst_get_sfreq(struct snd_sst_params *str_param)
{
	switch (str_param->codec) {
	case SST_CODEC_TYPE_PCM:
		return str_param->sparams.uc.pcm_params.sfreq;
	case SST_CODEC_TYPE_AAC:
		return str_param->sparams.uc.aac_params.externalsr;
	case SST_CODEC_TYPE_MP3:
		return 0;
	default:
		return -EINVAL;
	}
}

/*
 * sst_get_num_channel - get number of channels for the stream
 *
 * @str_param : stream params
 */
int sst_get_num_channel(struct snd_sst_params *str_param)
{
	switch (str_param->codec) {
	case SST_CODEC_TYPE_PCM:
		return str_param->sparams.uc.pcm_params.num_chan;
	case SST_CODEC_TYPE_MP3:
		return str_param->sparams.uc.mp3_params.num_chan;
	case SST_CODEC_TYPE_AAC:
		return str_param->sparams.uc.aac_params.num_chan;
	default:
		return -EINVAL;
	}
}

/*
 * sst_get_stream - this function prepares for stream allocation
 *
 * @str_param : stream param
 */
int sst_get_stream(struct intel_sst_drv *ctx,
			struct snd_sst_params *str_param)
{
	int retval;
	struct stream_info *str_info;

	/* stream is not allocated, we are allocating */
	retval = ctx->ops->alloc_stream(ctx, str_param);
	if (retval <= 0) {
		return -EIO;
	}
	/* store sampling freq */
	str_info = &ctx->streams[retval];
	str_info->sfreq = sst_get_sfreq(str_param);

	return retval;
}

static int sst_power_control(struct device *dev, bool state)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);
	int ret = 0;
	int usage_count = 0;

	if (state == true) {
		ret = pm_runtime_get_sync(dev);
		usage_count = GET_USAGE_COUNT(dev);
		dev_dbg(ctx->dev, "Enable: pm usage count: %d\n", usage_count);
		if (ret < 0) {
			pm_runtime_put_sync(dev);
			dev_err(ctx->dev, "Runtime get failed with err: %d\n", ret);
			return ret;
		}
		if ((ctx->sst_state == SST_RESET) && (usage_count == 1)) {
			ret = sst_load_fw(ctx);
			if (ret) {
				dev_err(dev, "FW download fail %d\n", ret);
				sst_set_fw_state_locked(ctx, SST_RESET);
				ret = sst_pm_runtime_put(ctx);
			}
		}
	} else {
		usage_count = GET_USAGE_COUNT(dev);
		dev_dbg(ctx->dev, "Disable: pm usage count: %d\n", usage_count);
		return sst_pm_runtime_put(ctx);
	}
	return ret;
}

/*
 * sst_open_pcm_stream - Open PCM interface
 *
 * @str_param: parameters of pcm stream
 *
 * This function is called by MID sound card driver to open
 * a new pcm interface
 */
static int sst_open_pcm_stream(struct device *dev,
		struct snd_sst_params *str_param)
{
	int retval;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (!str_param)
		return -EINVAL;

	retval = sst_get_stream(ctx, str_param);
	if (retval > 0)
		ctx->stream_cnt++;
	else
		dev_err(ctx->dev, "sst_get_stream returned err %d\n", retval);

	return retval;
}

static int sst_cdev_open(struct device *dev,
		struct snd_sst_params *str_params, struct sst_compress_cb *cb)
{
	int str_id, retval;
	struct stream_info *stream;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	retval = pm_runtime_get_sync(ctx->dev);
	if (retval < 0) {
		pm_runtime_put_sync(ctx->dev);
		return retval;
	}

	str_id = sst_get_stream(ctx, str_params);
	if (str_id > 0) {
		dev_dbg(dev, "stream allocated in sst_cdev_open %d\n", str_id);
		stream = &ctx->streams[str_id];
		stream->compr_cb = cb->compr_cb;
		stream->compr_cb_param = cb->param;
		stream->drain_notify = cb->drain_notify;
		stream->drain_cb_param = cb->drain_cb_param;
	} else {
		dev_err(dev, "stream encountered error during alloc %d\n", str_id);
		str_id = -EINVAL;
		sst_pm_runtime_put(ctx);
	}
	return str_id;
}

static int sst_cdev_close(struct device *dev, unsigned int str_id)
{
	int retval;
	struct stream_info *stream;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	stream = get_stream_info(ctx, str_id);
	if (!stream) {
		dev_err(dev, "stream info is NULL for str %d!!!\n", str_id);
		return -EINVAL;
	}

	retval = sst_free_stream(ctx, str_id);
	stream->compr_cb_param = NULL;
	stream->compr_cb = NULL;

	if (retval)
		dev_err(dev, "free stream returned err %d\n", retval);

	dev_dbg(dev, "End\n");
	return retval;
}

static int sst_cdev_ack(struct device *dev, unsigned int str_id,
		unsigned long bytes)
{
	struct stream_info *stream;
	struct snd_sst_tstamp fw_tstamp = {0,};
	int offset;
	void __iomem *addr;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	stream = get_stream_info(ctx, str_id);
	if (!stream)
		return -EINVAL;

	/* update bytes sent */
	stream->cumm_bytes += bytes;
	dev_dbg(dev, "bytes copied %d inc by %ld\n", stream->cumm_bytes, bytes);

	memcpy_fromio(&fw_tstamp,
		((void *)(ctx->mailbox + ctx->tstamp)
		+(str_id * sizeof(fw_tstamp))),
		sizeof(fw_tstamp));

	fw_tstamp.bytes_copied = stream->cumm_bytes;
	dev_dbg(dev, "bytes sent to fw %llu inc by %ld\n",
			fw_tstamp.bytes_copied, bytes);

	addr =  ((void *)(ctx->mailbox + ctx->tstamp)) +
			(str_id * sizeof(fw_tstamp));
	offset =  offsetof(struct snd_sst_tstamp, bytes_copied);
	sst_shim_write(addr, offset, fw_tstamp.bytes_copied);
	return 0;
}

static int sst_cdev_set_metadata(struct device *dev,
		unsigned int str_id, struct snd_compr_metadata *metadata)
{
	int retval = 0;
	struct stream_info *str_info;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	dev_dbg(dev, "set metadata for stream %d\n", str_id);

	str_info = get_stream_info(ctx, str_id);
	if (!str_info)
		return -EINVAL;

	dev_dbg(dev, "pipe id = %d\n", str_info->pipe_id);
	retval = sst_prepare_and_post_msg(ctx, str_info->task_id, IPC_CMD,
			IPC_IA_SET_STREAM_PARAMS_MRFLD, str_info->pipe_id,
			sizeof(*metadata), metadata, NULL,
			true, true, true, false);

	return retval;
}

static int sst_cdev_stream_pause(struct device *dev, unsigned int str_id)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	return sst_pause_stream(ctx, str_id);
}

static int sst_cdev_stream_pause_release(struct device *dev,
		unsigned int str_id)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	return sst_resume_stream(ctx, str_id);
}

static int sst_cdev_stream_start(struct device *dev, unsigned int str_id)
{
	struct stream_info *str_info;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	str_info = get_stream_info(ctx, str_id);
	if (!str_info)
		return -EINVAL;
	str_info->prev = str_info->status;
	str_info->status = STREAM_RUNNING;
	return sst_start_stream(ctx, str_id);
}

static int sst_cdev_stream_drop(struct device *dev, unsigned int str_id)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	return sst_drop_stream(ctx, str_id);
}

static int sst_cdev_stream_drain(struct device *dev, unsigned int str_id)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	return sst_drain_stream(ctx, str_id, false);
}

static int sst_cdev_stream_partial_drain(struct device *dev,
		unsigned int str_id)
{
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	return sst_drain_stream(ctx, str_id, true);
}

static int sst_cdev_tstamp(struct device *dev, unsigned int str_id,
		struct snd_compr_tstamp *tstamp)
{
	struct snd_sst_tstamp fw_tstamp = {0,};
	struct stream_info *stream;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	memcpy_fromio(&fw_tstamp,
		((void *)(ctx->mailbox + ctx->tstamp)
		+(str_id * sizeof(fw_tstamp))),
		sizeof(fw_tstamp));

	stream = get_stream_info(ctx, str_id);
	if (!stream)
		return -EINVAL;
	dev_dbg(dev, "rb_counter %llu in bytes\n", fw_tstamp.ring_buffer_counter);

	tstamp->copied_total = fw_tstamp.ring_buffer_counter;
	tstamp->pcm_frames = fw_tstamp.frames_decoded;
	tstamp->pcm_io_frames = div_u64(fw_tstamp.hardware_counter,
			(u64)stream->num_ch * SST_GET_BYTES_PER_SAMPLE(24));
	tstamp->sampling_rate = fw_tstamp.sampling_frequency;

	dev_dbg(dev, "PCM  = %u\n", tstamp->pcm_io_frames);
	dev_dbg(dev, "Ptr Query on strid = %d  copied_total %d, decodec %d\n",
		str_id, tstamp->copied_total, tstamp->pcm_frames);
	dev_dbg(dev, "rendered %d\n", tstamp->pcm_io_frames);

	return 0;
}

static int sst_cdev_caps(struct snd_compr_caps *caps)
{
	caps->num_codecs = NUM_CODEC;
	caps->min_fragment_size = MIN_FRAGMENT_SIZE;  /* 50KB */
	caps->max_fragment_size = MAX_FRAGMENT_SIZE;  /* 1024KB */
	caps->min_fragments = MIN_FRAGMENT;
	caps->max_fragments = MAX_FRAGMENT;
	caps->codecs[0] = SND_AUDIOCODEC_MP3;
	caps->codecs[1] = SND_AUDIOCODEC_AAC;
	return 0;
}

static const struct snd_compr_codec_caps caps_mp3 = {
	.num_descriptors = 1,
	.descriptor[0].max_ch = 2,
	.descriptor[0].sample_rates[0] = 48000,
	.descriptor[0].sample_rates[1] = 44100,
	.descriptor[0].sample_rates[2] = 32000,
	.descriptor[0].sample_rates[3] = 16000,
	.descriptor[0].sample_rates[4] = 8000,
	.descriptor[0].num_sample_rates = 5,
	.descriptor[0].bit_rate[0] = 320,
	.descriptor[0].bit_rate[1] = 192,
	.descriptor[0].num_bitrates = 2,
	.descriptor[0].profiles = 0,
	.descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO,
	.descriptor[0].formats = 0,
};

static const struct snd_compr_codec_caps caps_aac = {
	.num_descriptors = 2,
	.descriptor[1].max_ch = 2,
	.descriptor[0].sample_rates[0] = 48000,
	.descriptor[0].sample_rates[1] = 44100,
	.descriptor[0].sample_rates[2] = 32000,
	.descriptor[0].sample_rates[3] = 16000,
	.descriptor[0].sample_rates[4] = 8000,
	.descriptor[0].num_sample_rates = 5,
	.descriptor[1].bit_rate[0] = 320,
	.descriptor[1].bit_rate[1] = 192,
	.descriptor[1].num_bitrates = 2,
	.descriptor[1].profiles = 0,
	.descriptor[1].modes = 0,
	.descriptor[1].formats =
			(SND_AUDIOSTREAMFORMAT_MP4ADTS |
				SND_AUDIOSTREAMFORMAT_RAW),
};

static int sst_cdev_codec_caps(struct snd_compr_codec_caps *codec)
{
	if (codec->codec == SND_AUDIOCODEC_MP3)
		*codec = caps_mp3;
	else if (codec->codec == SND_AUDIOCODEC_AAC)
		*codec = caps_aac;
	else
		return -EINVAL;

	return 0;
}

void sst_cdev_fragment_elapsed(struct intel_sst_drv *ctx, int str_id)
{
	struct stream_info *stream;

	dev_dbg(ctx->dev, "fragment elapsed from firmware for str_id %d\n",
			str_id);
	stream = &ctx->streams[str_id];
	if (stream->compr_cb)
		stream->compr_cb(stream->compr_cb_param);
}

/*
 * sst_close_pcm_stream - Close PCM interface
 *
 * @str_id: stream id to be closed
 *
 * This function is called by MID sound card driver to close
 * an existing pcm interface
 */
static int sst_close_pcm_stream(struct device *dev, unsigned int str_id)
{
	struct stream_info *stream;
	int retval = 0;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	stream = get_stream_info(ctx, str_id);
	if (!stream) {
		dev_err(ctx->dev, "stream info is NULL for str %d!!!\n", str_id);
		return -EINVAL;
	}

	retval = free_stream_context(ctx, str_id);
	stream->pcm_substream = NULL;
	stream->status = STREAM_UN_INIT;
	stream->period_elapsed = NULL;
	ctx->stream_cnt--;

	if (retval)
		dev_err(ctx->dev, "free stream returned err %d\n", retval);

	dev_dbg(ctx->dev, "Exit\n");
	return 0;
}

static inline int sst_calc_tstamp(struct intel_sst_drv *ctx,
		struct pcm_stream_info *info,
		struct snd_pcm_substream *substream,
		struct snd_sst_tstamp *fw_tstamp)
{
	size_t delay_bytes, delay_frames;
	size_t buffer_sz;
	u32 pointer_bytes, pointer_samples;

	dev_dbg(ctx->dev, "mrfld ring_buffer_counter %llu in bytes\n",
			fw_tstamp->ring_buffer_counter);
	dev_dbg(ctx->dev, "mrfld hardware_counter %llu in bytes\n",
			 fw_tstamp->hardware_counter);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		delay_bytes = (size_t) (fw_tstamp->ring_buffer_counter -
					fw_tstamp->hardware_counter);
	else
		delay_bytes = (size_t) (fw_tstamp->hardware_counter -
					fw_tstamp->ring_buffer_counter);
	delay_frames = bytes_to_frames(substream->runtime, delay_bytes);
	buffer_sz = snd_pcm_lib_buffer_bytes(substream);
	div_u64_rem(fw_tstamp->ring_buffer_counter, buffer_sz, &pointer_bytes);
	pointer_samples = bytes_to_samples(substream->runtime, pointer_bytes);

	dev_dbg(ctx->dev, "pcm delay %zu in bytes\n", delay_bytes);

	info->buffer_ptr = pointer_samples / substream->runtime->channels;

	info->pcm_delay = delay_frames;
	dev_dbg(ctx->dev, "buffer ptr %llu pcm_delay rep: %llu\n",
			info->buffer_ptr, info->pcm_delay);
	return 0;
}

static int sst_read_timestamp(struct device *dev, struct pcm_stream_info *info)
{
	struct stream_info *stream;
	struct snd_pcm_substream *substream;
	struct snd_sst_tstamp fw_tstamp;
	unsigned int str_id;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	str_id = info->str_id;
	stream = get_stream_info(ctx, str_id);
	if (!stream)
		return -EINVAL;

	if (!stream->pcm_substream)
		return -EINVAL;
	substream = stream->pcm_substream;

	memcpy_fromio(&fw_tstamp,
		((void *)(ctx->mailbox + ctx->tstamp)
			+ (str_id * sizeof(fw_tstamp))),
		sizeof(fw_tstamp));
	return sst_calc_tstamp(ctx, info, substream, &fw_tstamp);
}

static int sst_stream_start(struct device *dev, int str_id)
{
	struct stream_info *str_info;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (ctx->sst_state != SST_FW_RUNNING)
		return 0;
	str_info = get_stream_info(ctx, str_id);
	if (!str_info)
		return -EINVAL;
	str_info->prev = str_info->status;
	str_info->status = STREAM_RUNNING;
	sst_start_stream(ctx, str_id);

	return 0;
}

static int sst_stream_drop(struct device *dev, int str_id)
{
	struct stream_info *str_info;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (ctx->sst_state != SST_FW_RUNNING)
		return 0;

	str_info = get_stream_info(ctx, str_id);
	if (!str_info)
		return -EINVAL;
	str_info->prev = STREAM_UN_INIT;
	str_info->status = STREAM_INIT;
	return sst_drop_stream(ctx, str_id);
}

static int sst_stream_pause(struct device *dev, int str_id)
{
	struct stream_info *str_info;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (ctx->sst_state != SST_FW_RUNNING)
		return 0;

	str_info = get_stream_info(ctx, str_id);
	if (!str_info)
		return -EINVAL;

	return sst_pause_stream(ctx, str_id);
}

static int sst_stream_resume(struct device *dev, int str_id)
{
	struct stream_info *str_info;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (ctx->sst_state != SST_FW_RUNNING)
		return 0;

	str_info = get_stream_info(ctx, str_id);
	if (!str_info)
		return -EINVAL;
	return sst_resume_stream(ctx, str_id);
}

static int sst_stream_init(struct device *dev, struct pcm_stream_info *str_info)
{
	int str_id = 0;
	struct stream_info *stream;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	str_id = str_info->str_id;

	if (ctx->sst_state != SST_FW_RUNNING)
		return 0;

	stream = get_stream_info(ctx, str_id);
	if (!stream)
		return -EINVAL;

	dev_dbg(ctx->dev, "setting the period ptrs\n");
	stream->pcm_substream = str_info->arg;
	stream->period_elapsed = str_info->period_elapsed;
	stream->sfreq = str_info->sfreq;
	stream->prev = stream->status;
	stream->status = STREAM_INIT;
	dev_dbg(ctx->dev,
		"pcm_substream %p, period_elapsed %p, sfreq %d, status %d\n",
		stream->pcm_substream, stream->period_elapsed,
		stream->sfreq, stream->status);

	return 0;
}

/*
 * sst_set_byte_stream - Set generic params
 *
 * @cmd: control cmd to be set
 * @arg: command argument
 *
 * This function is called by MID sound card driver to configure
 * SST runtime params.
 */
static int sst_send_byte_stream(struct device *dev,
		struct snd_sst_bytes_v2 *bytes)
{
	int ret_val = 0;
	struct intel_sst_drv *ctx = dev_get_drvdata(dev);

	if (NULL == bytes)
		return -EINVAL;
	ret_val = pm_runtime_get_sync(ctx->dev);
	if (ret_val < 0) {
		pm_runtime_put_sync(ctx->dev);
		return ret_val;
	}

	ret_val = sst_send_byte_stream_mrfld(ctx, bytes);
	sst_pm_runtime_put(ctx);

	return ret_val;
}

static struct sst_ops pcm_ops = {
	.open = sst_open_pcm_stream,
	.stream_init = sst_stream_init,
	.stream_start = sst_stream_start,
	.stream_drop = sst_stream_drop,
	.stream_pause = sst_stream_pause,
	.stream_pause_release = sst_stream_resume,
	.stream_read_tstamp = sst_read_timestamp,
	.send_byte_stream = sst_send_byte_stream,
	.close = sst_close_pcm_stream,
	.power = sst_power_control,
};

static struct compress_sst_ops compr_ops = {
	.open = sst_cdev_open,
	.close = sst_cdev_close,
	.stream_pause = sst_cdev_stream_pause,
	.stream_pause_release = sst_cdev_stream_pause_release,
	.stream_start = sst_cdev_stream_start,
	.stream_drop = sst_cdev_stream_drop,
	.stream_drain = sst_cdev_stream_drain,
	.stream_partial_drain = sst_cdev_stream_partial_drain,
	.tstamp = sst_cdev_tstamp,
	.ack = sst_cdev_ack,
	.get_caps = sst_cdev_caps,
	.get_codec_caps = sst_cdev_codec_caps,
	.set_metadata = sst_cdev_set_metadata,
	.power = sst_power_control,
};

static struct sst_device sst_dsp_device = {
	.name = "Intel(R) SST LPE",
	.dev = NULL,
	.ops = &pcm_ops,
	.compr_ops = &compr_ops,
};

/*
 * sst_register - function to register DSP
 *
 * This functions registers DSP with the platform driver
 */
int sst_register(struct device *dev)
{
	int ret_val;

	sst_dsp_device.dev = dev;
	ret_val = sst_register_dsp(&sst_dsp_device);
	if (ret_val)
		dev_err(dev, "Unable to register DSP with platform driver\n");

	return ret_val;
}

int sst_unregister(struct device *dev)
{
	return sst_unregister_dsp(&sst_dsp_device);
}