1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * sst_drv_interface.c - Intel SST Driver for audio engine
4 *
5 * Copyright (C) 2008-14 Intel Corp
6 * Authors: Vinod Koul <vinod.koul@intel.com>
7 * Harsha Priya <priya.harsha@intel.com>
8 * Dharageswari R <dharageswari.r@intel.com)
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 *
11 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 */
13 #include <linux/delay.h>
14 #include <linux/pci.h>
15 #include <linux/fs.h>
16 #include <linux/firmware.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/pm_qos.h>
19 #include <linux/math64.h>
20 #include <sound/core.h>
21 #include <sound/pcm.h>
22 #include <sound/soc.h>
23 #include <sound/compress_driver.h>
24 #include <asm/platform_sst_audio.h>
25 #include "../sst-mfld-platform.h"
26 #include "sst.h"
27
28 #define NUM_CODEC 2
29 #define MIN_FRAGMENT 2
30 #define MAX_FRAGMENT 4
31 #define MIN_FRAGMENT_SIZE (50 * 1024)
32 #define MAX_FRAGMENT_SIZE (1024 * 1024)
33 #define SST_GET_BYTES_PER_SAMPLE(pcm_wd_sz) (((pcm_wd_sz + 15) >> 4) << 1)
34 #ifdef CONFIG_PM
35 #define GET_USAGE_COUNT(dev) (atomic_read(&dev->power.usage_count))
36 #else
37 #define GET_USAGE_COUNT(dev) 1
38 #endif
39
40 int free_stream_context(struct intel_sst_drv *ctx, unsigned int str_id)
41 {
42 struct stream_info *stream;
43 int ret = 0;
44
45 stream = get_stream_info(ctx, str_id);
46 if (stream) {
47 /* str_id is valid, so stream is alloacted */
48 ret = sst_free_stream(ctx, str_id);
49 if (ret)
50 sst_clean_stream(&ctx->streams[str_id]);
51 return ret;
52 } else {
53 dev_err(ctx->dev, "we tried to free stream context %d which was freed!!!\n", str_id);
54 }
55 return ret;
56 }
57
58 int sst_get_stream_allocated(struct intel_sst_drv *ctx,
59 struct snd_sst_params *str_param,
60 struct snd_sst_lib_download **lib_dnld)
61 {
62 int retval;
63
64 retval = ctx->ops->alloc_stream(ctx, str_param);
65 if (retval > 0)
66 dev_dbg(ctx->dev, "Stream allocated %d\n", retval);
67 return retval;
68
69 }
70
71 /*
72 * sst_get_sfreq - this function returns the frequency of the stream
73 *
74 * @str_param : stream params
75 */
76 int sst_get_sfreq(struct snd_sst_params *str_param)
77 {
78 switch (str_param->codec) {
79 case SST_CODEC_TYPE_PCM:
80 return str_param->sparams.uc.pcm_params.sfreq;
81 case SST_CODEC_TYPE_AAC:
82 return str_param->sparams.uc.aac_params.externalsr;
83 case SST_CODEC_TYPE_MP3:
84 return 0;
85 default:
86 return -EINVAL;
87 }
88 }
89
90 /*
91 * sst_get_num_channel - get number of channels for the stream
92 *
93 * @str_param : stream params
94 */
95 int sst_get_num_channel(struct snd_sst_params *str_param)
96 {
97 switch (str_param->codec) {
98 case SST_CODEC_TYPE_PCM:
99 return str_param->sparams.uc.pcm_params.num_chan;
100 case SST_CODEC_TYPE_MP3:
101 return str_param->sparams.uc.mp3_params.num_chan;
102 case SST_CODEC_TYPE_AAC:
103 return str_param->sparams.uc.aac_params.num_chan;
104 default:
105 return -EINVAL;
106 }
107 }
108
109 /*
110 * sst_get_stream - this function prepares for stream allocation
111 *
112 * @str_param : stream param
113 */
114 int sst_get_stream(struct intel_sst_drv *ctx,
115 struct snd_sst_params *str_param)
116 {
117 int retval;
118 struct stream_info *str_info;
119
120 /* stream is not allocated, we are allocating */
121 retval = ctx->ops->alloc_stream(ctx, str_param);
122 if (retval <= 0) {
123 return -EIO;
124 }
125 /* store sampling freq */
126 str_info = &ctx->streams[retval];
127 str_info->sfreq = sst_get_sfreq(str_param);
128
129 return retval;
130 }
131
132 static int sst_power_control(struct device *dev, bool state)
133 {
134 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
135 int ret = 0;
136 int usage_count = 0;
137
138 if (state) {
139 ret = pm_runtime_resume_and_get(dev);
140 usage_count = GET_USAGE_COUNT(dev);
141 dev_dbg(ctx->dev, "Enable: pm usage count: %d\n", usage_count);
142 if (ret < 0) {
143 dev_err(ctx->dev, "Runtime get failed with err: %d\n", ret);
144 return ret;
145 }
146 if ((ctx->sst_state == SST_RESET) && (usage_count == 1)) {
147 ret = sst_load_fw(ctx);
148 if (ret) {
149 dev_err(dev, "FW download fail %d\n", ret);
150 sst_set_fw_state_locked(ctx, SST_RESET);
151 ret = sst_pm_runtime_put(ctx);
152 }
153 }
154 } else {
155 usage_count = GET_USAGE_COUNT(dev);
156 dev_dbg(ctx->dev, "Disable: pm usage count: %d\n", usage_count);
157 return sst_pm_runtime_put(ctx);
158 }
159 return ret;
160 }
161
162 /*
163 * sst_open_pcm_stream - Open PCM interface
164 *
165 * @str_param: parameters of pcm stream
166 *
167 * This function is called by MID sound card driver to open
168 * a new pcm interface
169 */
170 static int sst_open_pcm_stream(struct device *dev,
171 struct snd_sst_params *str_param)
172 {
173 int retval;
174 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
175
176 if (!str_param)
177 return -EINVAL;
178
179 retval = sst_get_stream(ctx, str_param);
180 if (retval > 0)
181 ctx->stream_cnt++;
182 else
183 dev_err(ctx->dev, "sst_get_stream returned err %d\n", retval);
184
185 return retval;
186 }
187
188 static int sst_cdev_open(struct device *dev,
189 struct snd_sst_params *str_params, struct sst_compress_cb *cb)
190 {
191 int str_id, retval;
192 struct stream_info *stream;
193 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
194
195 retval = pm_runtime_resume_and_get(ctx->dev);
196 if (retval < 0)
197 return retval;
198
199 str_id = sst_get_stream(ctx, str_params);
200 if (str_id > 0) {
201 dev_dbg(dev, "stream allocated in sst_cdev_open %d\n", str_id);
202 stream = &ctx->streams[str_id];
203 stream->compr_cb = cb->compr_cb;
204 stream->compr_cb_param = cb->param;
205 stream->drain_notify = cb->drain_notify;
206 stream->drain_cb_param = cb->drain_cb_param;
207 } else {
208 dev_err(dev, "stream encountered error during alloc %d\n", str_id);
209 str_id = -EINVAL;
210 sst_pm_runtime_put(ctx);
211 }
212 return str_id;
213 }
214
215 static int sst_cdev_close(struct device *dev, unsigned int str_id)
216 {
217 int retval;
218 struct stream_info *stream;
219 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
220
221 stream = get_stream_info(ctx, str_id);
222 if (!stream) {
223 dev_err(dev, "stream info is NULL for str %d!!!\n", str_id);
224 return -EINVAL;
225 }
226
227 retval = sst_free_stream(ctx, str_id);
228 stream->compr_cb_param = NULL;
229 stream->compr_cb = NULL;
230
231 if (retval)
232 dev_err(dev, "free stream returned err %d\n", retval);
233
234 dev_dbg(dev, "End\n");
235 return retval;
236 }
237
238 static int sst_cdev_ack(struct device *dev, unsigned int str_id,
239 unsigned long bytes)
240 {
241 struct stream_info *stream;
242 struct snd_sst_tstamp fw_tstamp = {0,};
243 int offset;
244 void __iomem *addr;
245 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
246
247 stream = get_stream_info(ctx, str_id);
248 if (!stream)
249 return -EINVAL;
250
251 /* update bytes sent */
252 stream->cumm_bytes += bytes;
253 dev_dbg(dev, "bytes copied %d inc by %ld\n", stream->cumm_bytes, bytes);
254
255 addr = ((void __iomem *)(ctx->mailbox + ctx->tstamp)) +
256 (str_id * sizeof(fw_tstamp));
257
258 memcpy_fromio(&fw_tstamp, addr, sizeof(fw_tstamp));
259
260 fw_tstamp.bytes_copied = stream->cumm_bytes;
261 dev_dbg(dev, "bytes sent to fw %llu inc by %ld\n",
262 fw_tstamp.bytes_copied, bytes);
263
264 offset = offsetof(struct snd_sst_tstamp, bytes_copied);
265 sst_shim_write(addr, offset, fw_tstamp.bytes_copied);
266 return 0;
267 }
268
269 static int sst_cdev_set_metadata(struct device *dev,
270 unsigned int str_id, struct snd_compr_metadata *metadata)
271 {
272 int retval = 0;
273 struct stream_info *str_info;
274 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
275
276 dev_dbg(dev, "set metadata for stream %d\n", str_id);
277
278 str_info = get_stream_info(ctx, str_id);
279 if (!str_info)
280 return -EINVAL;
281
282 dev_dbg(dev, "pipe id = %d\n", str_info->pipe_id);
283 retval = sst_prepare_and_post_msg(ctx, str_info->task_id, IPC_CMD,
284 IPC_IA_SET_STREAM_PARAMS_MRFLD, str_info->pipe_id,
285 sizeof(*metadata), metadata, NULL,
286 true, true, true, false);
287
288 return retval;
289 }
290
291 static int sst_cdev_stream_pause(struct device *dev, unsigned int str_id)
292 {
293 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
294
295 return sst_pause_stream(ctx, str_id);
296 }
297
298 static int sst_cdev_stream_pause_release(struct device *dev,
299 unsigned int str_id)
300 {
301 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
302
303 return sst_resume_stream(ctx, str_id);
304 }
305
306 static int sst_cdev_stream_start(struct device *dev, unsigned int str_id)
307 {
308 struct stream_info *str_info;
309 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
310
311 str_info = get_stream_info(ctx, str_id);
312 if (!str_info)
313 return -EINVAL;
314 str_info->prev = str_info->status;
315 str_info->status = STREAM_RUNNING;
316 return sst_start_stream(ctx, str_id);
317 }
318
319 static int sst_cdev_stream_drop(struct device *dev, unsigned int str_id)
320 {
321 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
322
323 return sst_drop_stream(ctx, str_id);
324 }
325
326 static int sst_cdev_stream_drain(struct device *dev, unsigned int str_id)
327 {
328 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
329
330 return sst_drain_stream(ctx, str_id, false);
331 }
332
333 static int sst_cdev_stream_partial_drain(struct device *dev,
334 unsigned int str_id)
335 {
336 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
337
338 return sst_drain_stream(ctx, str_id, true);
339 }
340
341 static int sst_cdev_tstamp(struct device *dev, unsigned int str_id,
342 struct snd_compr_tstamp *tstamp)
343 {
344 struct snd_sst_tstamp fw_tstamp = {0,};
345 struct stream_info *stream;
346 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
347 void __iomem *addr;
348
349 addr = (void __iomem *)(ctx->mailbox + ctx->tstamp) +
350 (str_id * sizeof(fw_tstamp));
351
352 memcpy_fromio(&fw_tstamp, addr, sizeof(fw_tstamp));
353
354 stream = get_stream_info(ctx, str_id);
355 if (!stream)
356 return -EINVAL;
357 dev_dbg(dev, "rb_counter %llu in bytes\n", fw_tstamp.ring_buffer_counter);
358
359 tstamp->copied_total = fw_tstamp.ring_buffer_counter;
360 tstamp->pcm_frames = fw_tstamp.frames_decoded;
361 tstamp->pcm_io_frames = div_u64(fw_tstamp.hardware_counter,
362 (u64)stream->num_ch * SST_GET_BYTES_PER_SAMPLE(24));
363 tstamp->sampling_rate = fw_tstamp.sampling_frequency;
364
365 dev_dbg(dev, "PCM = %u\n", tstamp->pcm_io_frames);
366 dev_dbg(dev, "Ptr Query on strid = %d copied_total %d, decodec %d\n",
367 str_id, tstamp->copied_total, tstamp->pcm_frames);
368 dev_dbg(dev, "rendered %d\n", tstamp->pcm_io_frames);
369
370 return 0;
371 }
372
373 static int sst_cdev_caps(struct snd_compr_caps *caps)
374 {
375 caps->num_codecs = NUM_CODEC;
376 caps->min_fragment_size = MIN_FRAGMENT_SIZE; /* 50KB */
377 caps->max_fragment_size = MAX_FRAGMENT_SIZE; /* 1024KB */
378 caps->min_fragments = MIN_FRAGMENT;
379 caps->max_fragments = MAX_FRAGMENT;
380 caps->codecs[0] = SND_AUDIOCODEC_MP3;
381 caps->codecs[1] = SND_AUDIOCODEC_AAC;
382 return 0;
383 }
384
385 static const struct snd_compr_codec_caps caps_mp3 = {
386 .num_descriptors = 1,
387 .descriptor[0].max_ch = 2,
388 .descriptor[0].sample_rates[0] = 48000,
389 .descriptor[0].sample_rates[1] = 44100,
390 .descriptor[0].sample_rates[2] = 32000,
391 .descriptor[0].sample_rates[3] = 16000,
392 .descriptor[0].sample_rates[4] = 8000,
393 .descriptor[0].num_sample_rates = 5,
394 .descriptor[0].bit_rate[0] = 320,
395 .descriptor[0].bit_rate[1] = 192,
396 .descriptor[0].num_bitrates = 2,
397 .descriptor[0].profiles = 0,
398 .descriptor[0].modes = SND_AUDIOCHANMODE_MP3_STEREO,
399 .descriptor[0].formats = 0,
400 };
401
402 static const struct snd_compr_codec_caps caps_aac = {
403 .num_descriptors = 2,
404 .descriptor[1].max_ch = 2,
405 .descriptor[0].sample_rates[0] = 48000,
406 .descriptor[0].sample_rates[1] = 44100,
407 .descriptor[0].sample_rates[2] = 32000,
408 .descriptor[0].sample_rates[3] = 16000,
409 .descriptor[0].sample_rates[4] = 8000,
410 .descriptor[0].num_sample_rates = 5,
411 .descriptor[1].bit_rate[0] = 320,
412 .descriptor[1].bit_rate[1] = 192,
413 .descriptor[1].num_bitrates = 2,
414 .descriptor[1].profiles = 0,
415 .descriptor[1].modes = 0,
416 .descriptor[1].formats =
417 (SND_AUDIOSTREAMFORMAT_MP4ADTS |
418 SND_AUDIOSTREAMFORMAT_RAW),
419 };
420
421 static int sst_cdev_codec_caps(struct snd_compr_codec_caps *codec)
422 {
423 if (codec->codec == SND_AUDIOCODEC_MP3)
424 *codec = caps_mp3;
425 else if (codec->codec == SND_AUDIOCODEC_AAC)
426 *codec = caps_aac;
427 else
428 return -EINVAL;
429
430 return 0;
431 }
432
433 void sst_cdev_fragment_elapsed(struct intel_sst_drv *ctx, int str_id)
434 {
435 struct stream_info *stream;
436
437 dev_dbg(ctx->dev, "fragment elapsed from firmware for str_id %d\n",
438 str_id);
439 stream = &ctx->streams[str_id];
440 if (stream->compr_cb)
441 stream->compr_cb(stream->compr_cb_param);
442 }
443
444 /*
445 * sst_close_pcm_stream - Close PCM interface
446 *
447 * @str_id: stream id to be closed
448 *
449 * This function is called by MID sound card driver to close
450 * an existing pcm interface
451 */
452 static int sst_close_pcm_stream(struct device *dev, unsigned int str_id)
453 {
454 struct stream_info *stream;
455 int retval = 0;
456 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
457
458 stream = get_stream_info(ctx, str_id);
459 if (!stream) {
460 dev_err(ctx->dev, "stream info is NULL for str %d!!!\n", str_id);
461 return -EINVAL;
462 }
463
464 retval = free_stream_context(ctx, str_id);
465 stream->pcm_substream = NULL;
466 stream->status = STREAM_UN_INIT;
467 stream->period_elapsed = NULL;
468 ctx->stream_cnt--;
469
470 if (retval)
471 dev_err(ctx->dev, "free stream returned err %d\n", retval);
472
473 dev_dbg(ctx->dev, "Exit\n");
474 return 0;
475 }
476
477 static inline int sst_calc_tstamp(struct intel_sst_drv *ctx,
478 struct pcm_stream_info *info,
479 struct snd_pcm_substream *substream,
480 struct snd_sst_tstamp *fw_tstamp)
481 {
482 size_t delay_bytes, delay_frames;
483 size_t buffer_sz;
484 u32 pointer_bytes, pointer_samples;
485
486 dev_dbg(ctx->dev, "mrfld ring_buffer_counter %llu in bytes\n",
487 fw_tstamp->ring_buffer_counter);
488 dev_dbg(ctx->dev, "mrfld hardware_counter %llu in bytes\n",
489 fw_tstamp->hardware_counter);
490 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
491 delay_bytes = (size_t) (fw_tstamp->ring_buffer_counter -
492 fw_tstamp->hardware_counter);
493 else
494 delay_bytes = (size_t) (fw_tstamp->hardware_counter -
495 fw_tstamp->ring_buffer_counter);
496 delay_frames = bytes_to_frames(substream->runtime, delay_bytes);
497 buffer_sz = snd_pcm_lib_buffer_bytes(substream);
498 div_u64_rem(fw_tstamp->ring_buffer_counter, buffer_sz, &pointer_bytes);
499 pointer_samples = bytes_to_samples(substream->runtime, pointer_bytes);
500
501 dev_dbg(ctx->dev, "pcm delay %zu in bytes\n", delay_bytes);
502
503 info->buffer_ptr = pointer_samples / substream->runtime->channels;
504
505 info->pcm_delay = delay_frames;
506 dev_dbg(ctx->dev, "buffer ptr %llu pcm_delay rep: %llu\n",
507 info->buffer_ptr, info->pcm_delay);
508 return 0;
509 }
510
511 static int sst_read_timestamp(struct device *dev, struct pcm_stream_info *info)
512 {
513 struct stream_info *stream;
514 struct snd_pcm_substream *substream;
515 struct snd_sst_tstamp fw_tstamp;
516 unsigned int str_id;
517 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
518 void __iomem *addr;
519
520 str_id = info->str_id;
521 stream = get_stream_info(ctx, str_id);
522 if (!stream)
523 return -EINVAL;
524
525 if (!stream->pcm_substream)
526 return -EINVAL;
527 substream = stream->pcm_substream;
528
529 addr = (void __iomem *)(ctx->mailbox + ctx->tstamp) +
530 (str_id * sizeof(fw_tstamp));
531
532 memcpy_fromio(&fw_tstamp, addr, sizeof(fw_tstamp));
533
534 return sst_calc_tstamp(ctx, info, substream, &fw_tstamp);
535 }
536
537 static int sst_stream_start(struct device *dev, int str_id)
538 {
539 struct stream_info *str_info;
540 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
541
542 if (ctx->sst_state != SST_FW_RUNNING)
543 return 0;
544 str_info = get_stream_info(ctx, str_id);
545 if (!str_info)
546 return -EINVAL;
547 str_info->prev = str_info->status;
548 str_info->status = STREAM_RUNNING;
549 sst_start_stream(ctx, str_id);
550
551 return 0;
552 }
553
554 static int sst_stream_drop(struct device *dev, int str_id)
555 {
556 struct stream_info *str_info;
557 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
558
559 if (ctx->sst_state != SST_FW_RUNNING)
560 return 0;
561
562 str_info = get_stream_info(ctx, str_id);
563 if (!str_info)
564 return -EINVAL;
565 str_info->prev = STREAM_UN_INIT;
566 str_info->status = STREAM_INIT;
567 return sst_drop_stream(ctx, str_id);
568 }
569
570 static int sst_stream_pause(struct device *dev, int str_id)
571 {
572 struct stream_info *str_info;
573 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
574
575 if (ctx->sst_state != SST_FW_RUNNING)
576 return 0;
577
578 str_info = get_stream_info(ctx, str_id);
579 if (!str_info)
580 return -EINVAL;
581
582 return sst_pause_stream(ctx, str_id);
583 }
584
585 static int sst_stream_resume(struct device *dev, int str_id)
586 {
587 struct stream_info *str_info;
588 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
589
590 if (ctx->sst_state != SST_FW_RUNNING)
591 return 0;
592
593 str_info = get_stream_info(ctx, str_id);
594 if (!str_info)
595 return -EINVAL;
596 return sst_resume_stream(ctx, str_id);
597 }
598
599 static int sst_stream_init(struct device *dev, struct pcm_stream_info *str_info)
600 {
601 int str_id = 0;
602 struct stream_info *stream;
603 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
604
605 str_id = str_info->str_id;
606
607 if (ctx->sst_state != SST_FW_RUNNING)
608 return 0;
609
610 stream = get_stream_info(ctx, str_id);
611 if (!stream)
612 return -EINVAL;
613
614 dev_dbg(ctx->dev, "setting the period ptrs\n");
615 stream->pcm_substream = str_info->arg;
616 stream->period_elapsed = str_info->period_elapsed;
617 stream->sfreq = str_info->sfreq;
618 stream->prev = stream->status;
619 stream->status = STREAM_INIT;
620 dev_dbg(ctx->dev,
621 "pcm_substream %p, period_elapsed %p, sfreq %d, status %d\n",
622 stream->pcm_substream, stream->period_elapsed,
623 stream->sfreq, stream->status);
624
625 return 0;
626 }
627
628 /*
629 * sst_set_byte_stream - Set generic params
630 *
631 * @cmd: control cmd to be set
632 * @arg: command argument
633 *
634 * This function is called by MID sound card driver to configure
635 * SST runtime params.
636 */
637 static int sst_send_byte_stream(struct device *dev,
638 struct snd_sst_bytes_v2 *bytes)
639 {
640 int ret_val = 0;
641 struct intel_sst_drv *ctx = dev_get_drvdata(dev);
642
643 if (NULL == bytes)
644 return -EINVAL;
645 ret_val = pm_runtime_resume_and_get(ctx->dev);
646 if (ret_val < 0)
647 return ret_val;
648
649 ret_val = sst_send_byte_stream_mrfld(ctx, bytes);
650 sst_pm_runtime_put(ctx);
651
652 return ret_val;
653 }
654
655 static struct sst_ops pcm_ops = {
656 .open = sst_open_pcm_stream,
657 .stream_init = sst_stream_init,
658 .stream_start = sst_stream_start,
659 .stream_drop = sst_stream_drop,
660 .stream_pause = sst_stream_pause,
661 .stream_pause_release = sst_stream_resume,
662 .stream_read_tstamp = sst_read_timestamp,
663 .send_byte_stream = sst_send_byte_stream,
664 .close = sst_close_pcm_stream,
665 .power = sst_power_control,
666 };
667
668 static struct compress_sst_ops compr_ops = {
669 .open = sst_cdev_open,
670 .close = sst_cdev_close,
671 .stream_pause = sst_cdev_stream_pause,
672 .stream_pause_release = sst_cdev_stream_pause_release,
673 .stream_start = sst_cdev_stream_start,
674 .stream_drop = sst_cdev_stream_drop,
675 .stream_drain = sst_cdev_stream_drain,
676 .stream_partial_drain = sst_cdev_stream_partial_drain,
677 .tstamp = sst_cdev_tstamp,
678 .ack = sst_cdev_ack,
679 .get_caps = sst_cdev_caps,
680 .get_codec_caps = sst_cdev_codec_caps,
681 .set_metadata = sst_cdev_set_metadata,
682 .power = sst_power_control,
683 };
684
685 static struct sst_device sst_dsp_device = {
686 .name = "Intel(R) SST LPE",
687 .dev = NULL,
688 .ops = &pcm_ops,
689 .compr_ops = &compr_ops,
690 };
691
692 /*
693 * sst_register - function to register DSP
694 *
695 * This functions registers DSP with the platform driver
696 */
697 int sst_register(struct device *dev)
698 {
699 int ret_val;
700
701 sst_dsp_device.dev = dev;
702 ret_val = sst_register_dsp(&sst_dsp_device);
703 if (ret_val)
704 dev_err(dev, "Unable to register DSP with platform driver\n");
705
706 return ret_val;
707 }
708
709 int sst_unregister(struct device *dev)
710 {
711 return sst_unregister_dsp(&sst_dsp_device);
712 }
713
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