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1/*
2 * sst_mfld_platform.c - Intel MID Platform driver
3 *
4 * Copyright (C) 2010-2013 Intel Corp
5 * Author: Vinod Koul <vinod.koul@intel.com>
6 * Author: Harsha Priya <priya.harsha@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 *
25 */
26#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27
28#include <linux/slab.h>
29#include <linux/io.h>
30#include <linux/module.h>
31#include <sound/core.h>
32#include <sound/pcm.h>
33#include <sound/pcm_params.h>
34#include <sound/soc.h>
35#include <sound/compress_driver.h>
36#include "sst-mfld-platform.h"
37
38static struct sst_device *sst;
39static DEFINE_MUTEX(sst_lock);
40
41int sst_register_dsp(struct sst_device *dev)
42{
43 if (WARN_ON(!dev))
44 return -EINVAL;
45 if (!try_module_get(dev->dev->driver->owner))
46 return -ENODEV;
47 mutex_lock(&sst_lock);
48 if (sst) {
49 pr_err("we already have a device %s\n", sst->name);
50 module_put(dev->dev->driver->owner);
51 mutex_unlock(&sst_lock);
52 return -EEXIST;
53 }
54 pr_debug("registering device %s\n", dev->name);
55 sst = dev;
56 mutex_unlock(&sst_lock);
57 return 0;
58}
59EXPORT_SYMBOL_GPL(sst_register_dsp);
60
61int sst_unregister_dsp(struct sst_device *dev)
62{
63 if (WARN_ON(!dev))
64 return -EINVAL;
65 if (dev != sst)
66 return -EINVAL;
67
68 mutex_lock(&sst_lock);
69
70 if (!sst) {
71 mutex_unlock(&sst_lock);
72 return -EIO;
73 }
74
75 module_put(sst->dev->driver->owner);
76 pr_debug("unreg %s\n", sst->name);
77 sst = NULL;
78 mutex_unlock(&sst_lock);
79 return 0;
80}
81EXPORT_SYMBOL_GPL(sst_unregister_dsp);
82
83static struct snd_pcm_hardware sst_platform_pcm_hw = {
84 .info = (SNDRV_PCM_INFO_INTERLEAVED |
85 SNDRV_PCM_INFO_DOUBLE |
86 SNDRV_PCM_INFO_PAUSE |
87 SNDRV_PCM_INFO_RESUME |
88 SNDRV_PCM_INFO_MMAP|
89 SNDRV_PCM_INFO_MMAP_VALID |
90 SNDRV_PCM_INFO_BLOCK_TRANSFER |
91 SNDRV_PCM_INFO_SYNC_START),
92 .buffer_bytes_max = SST_MAX_BUFFER,
93 .period_bytes_min = SST_MIN_PERIOD_BYTES,
94 .period_bytes_max = SST_MAX_PERIOD_BYTES,
95 .periods_min = SST_MIN_PERIODS,
96 .periods_max = SST_MAX_PERIODS,
97 .fifo_size = SST_FIFO_SIZE,
98};
99
100/* MFLD - MSIC */
101static struct snd_soc_dai_driver sst_platform_dai[] = {
102{
103 .name = "Headset-cpu-dai",
104 .id = 0,
105 .playback = {
106 .channels_min = SST_STEREO,
107 .channels_max = SST_STEREO,
108 .rates = SNDRV_PCM_RATE_48000,
109 .formats = SNDRV_PCM_FMTBIT_S24_LE,
110 },
111 .capture = {
112 .channels_min = 1,
113 .channels_max = 5,
114 .rates = SNDRV_PCM_RATE_48000,
115 .formats = SNDRV_PCM_FMTBIT_S24_LE,
116 },
117},
118{
119 .name = "Speaker-cpu-dai",
120 .id = 1,
121 .playback = {
122 .channels_min = SST_MONO,
123 .channels_max = SST_STEREO,
124 .rates = SNDRV_PCM_RATE_48000,
125 .formats = SNDRV_PCM_FMTBIT_S24_LE,
126 },
127},
128{
129 .name = "Vibra1-cpu-dai",
130 .id = 2,
131 .playback = {
132 .channels_min = SST_MONO,
133 .channels_max = SST_MONO,
134 .rates = SNDRV_PCM_RATE_48000,
135 .formats = SNDRV_PCM_FMTBIT_S24_LE,
136 },
137},
138{
139 .name = "Vibra2-cpu-dai",
140 .id = 3,
141 .playback = {
142 .channels_min = SST_MONO,
143 .channels_max = SST_STEREO,
144 .rates = SNDRV_PCM_RATE_48000,
145 .formats = SNDRV_PCM_FMTBIT_S24_LE,
146 },
147},
148{
149 .name = "Compress-cpu-dai",
150 .compress_dai = 1,
151 .playback = {
152 .channels_min = SST_STEREO,
153 .channels_max = SST_STEREO,
154 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
155 .formats = SNDRV_PCM_FMTBIT_S16_LE,
156 },
157},
158};
159
160static const struct snd_soc_component_driver sst_component = {
161 .name = "sst",
162};
163
164/* helper functions */
165static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
166 int state)
167{
168 unsigned long flags;
169 spin_lock_irqsave(&stream->status_lock, flags);
170 stream->stream_status = state;
171 spin_unlock_irqrestore(&stream->status_lock, flags);
172}
173
174static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
175{
176 int state;
177 unsigned long flags;
178
179 spin_lock_irqsave(&stream->status_lock, flags);
180 state = stream->stream_status;
181 spin_unlock_irqrestore(&stream->status_lock, flags);
182 return state;
183}
184
185static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
186 struct sst_pcm_params *param)
187{
188
189 param->codec = SST_CODEC_TYPE_PCM;
190 param->num_chan = (u8) substream->runtime->channels;
191 param->pcm_wd_sz = substream->runtime->sample_bits;
192 param->reserved = 0;
193 param->sfreq = substream->runtime->rate;
194 param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
195 param->period_count = substream->runtime->period_size;
196 param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
197 pr_debug("period_cnt = %d\n", param->period_count);
198 pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
199}
200
201static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
202{
203 struct sst_runtime_stream *stream =
204 substream->runtime->private_data;
205 struct sst_pcm_params param = {0};
206 struct sst_stream_params str_params = {0};
207 int ret_val;
208
209 /* set codec params and inform SST driver the same */
210 sst_fill_pcm_params(substream, ¶m);
211 substream->runtime->dma_area = substream->dma_buffer.area;
212 str_params.sparams = param;
213 str_params.codec = param.codec;
214 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
215 str_params.ops = STREAM_OPS_PLAYBACK;
216 str_params.device_type = substream->pcm->device + 1;
217 pr_debug("Playbck stream,Device %d\n",
218 substream->pcm->device);
219 } else {
220 str_params.ops = STREAM_OPS_CAPTURE;
221 str_params.device_type = SND_SST_DEVICE_CAPTURE;
222 pr_debug("Capture stream,Device %d\n",
223 substream->pcm->device);
224 }
225 ret_val = stream->ops->open(&str_params);
226 pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
227 if (ret_val < 0)
228 return ret_val;
229
230 stream->stream_info.str_id = ret_val;
231 pr_debug("str id : %d\n", stream->stream_info.str_id);
232 return ret_val;
233}
234
235static void sst_period_elapsed(void *mad_substream)
236{
237 struct snd_pcm_substream *substream = mad_substream;
238 struct sst_runtime_stream *stream;
239 int status;
240
241 if (!substream || !substream->runtime)
242 return;
243 stream = substream->runtime->private_data;
244 if (!stream)
245 return;
246 status = sst_get_stream_status(stream);
247 if (status != SST_PLATFORM_RUNNING)
248 return;
249 snd_pcm_period_elapsed(substream);
250}
251
252static int sst_platform_init_stream(struct snd_pcm_substream *substream)
253{
254 struct sst_runtime_stream *stream =
255 substream->runtime->private_data;
256 int ret_val;
257
258 pr_debug("setting buffer ptr param\n");
259 sst_set_stream_status(stream, SST_PLATFORM_INIT);
260 stream->stream_info.period_elapsed = sst_period_elapsed;
261 stream->stream_info.mad_substream = substream;
262 stream->stream_info.buffer_ptr = 0;
263 stream->stream_info.sfreq = substream->runtime->rate;
264 ret_val = stream->ops->device_control(
265 SST_SND_STREAM_INIT, &stream->stream_info);
266 if (ret_val)
267 pr_err("control_set ret error %d\n", ret_val);
268 return ret_val;
269
270}
271/* end -- helper functions */
272
273static int sst_platform_open(struct snd_pcm_substream *substream)
274{
275 struct snd_pcm_runtime *runtime = substream->runtime;
276 struct sst_runtime_stream *stream;
277 int ret_val;
278
279 pr_debug("sst_platform_open called\n");
280
281 snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
282 ret_val = snd_pcm_hw_constraint_integer(runtime,
283 SNDRV_PCM_HW_PARAM_PERIODS);
284 if (ret_val < 0)
285 return ret_val;
286
287 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
288 if (!stream)
289 return -ENOMEM;
290 spin_lock_init(&stream->status_lock);
291
292 /* get the sst ops */
293 mutex_lock(&sst_lock);
294 if (!sst) {
295 pr_err("no device available to run\n");
296 mutex_unlock(&sst_lock);
297 kfree(stream);
298 return -ENODEV;
299 }
300 if (!try_module_get(sst->dev->driver->owner)) {
301 mutex_unlock(&sst_lock);
302 kfree(stream);
303 return -ENODEV;
304 }
305 stream->ops = sst->ops;
306 mutex_unlock(&sst_lock);
307
308 stream->stream_info.str_id = 0;
309 sst_set_stream_status(stream, SST_PLATFORM_INIT);
310 stream->stream_info.mad_substream = substream;
311 /* allocate memory for SST API set */
312 runtime->private_data = stream;
313
314 return 0;
315}
316
317static int sst_platform_close(struct snd_pcm_substream *substream)
318{
319 struct sst_runtime_stream *stream;
320 int ret_val = 0, str_id;
321
322 pr_debug("sst_platform_close called\n");
323 stream = substream->runtime->private_data;
324 str_id = stream->stream_info.str_id;
325 if (str_id)
326 ret_val = stream->ops->close(str_id);
327 module_put(sst->dev->driver->owner);
328 kfree(stream);
329 return ret_val;
330}
331
332static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
333{
334 struct sst_runtime_stream *stream;
335 int ret_val = 0, str_id;
336
337 pr_debug("sst_platform_pcm_prepare called\n");
338 stream = substream->runtime->private_data;
339 str_id = stream->stream_info.str_id;
340 if (stream->stream_info.str_id) {
341 ret_val = stream->ops->device_control(
342 SST_SND_DROP, &str_id);
343 return ret_val;
344 }
345
346 ret_val = sst_platform_alloc_stream(substream);
347 if (ret_val < 0)
348 return ret_val;
349 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
350 "%d", stream->stream_info.str_id);
351
352 ret_val = sst_platform_init_stream(substream);
353 if (ret_val)
354 return ret_val;
355 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
356 return ret_val;
357}
358
359static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
360 int cmd)
361{
362 int ret_val = 0, str_id;
363 struct sst_runtime_stream *stream;
364 int str_cmd, status;
365
366 pr_debug("sst_platform_pcm_trigger called\n");
367 stream = substream->runtime->private_data;
368 str_id = stream->stream_info.str_id;
369 switch (cmd) {
370 case SNDRV_PCM_TRIGGER_START:
371 pr_debug("sst: Trigger Start\n");
372 str_cmd = SST_SND_START;
373 status = SST_PLATFORM_RUNNING;
374 stream->stream_info.mad_substream = substream;
375 break;
376 case SNDRV_PCM_TRIGGER_STOP:
377 pr_debug("sst: in stop\n");
378 str_cmd = SST_SND_DROP;
379 status = SST_PLATFORM_DROPPED;
380 break;
381 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
382 pr_debug("sst: in pause\n");
383 str_cmd = SST_SND_PAUSE;
384 status = SST_PLATFORM_PAUSED;
385 break;
386 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
387 pr_debug("sst: in pause release\n");
388 str_cmd = SST_SND_RESUME;
389 status = SST_PLATFORM_RUNNING;
390 break;
391 default:
392 return -EINVAL;
393 }
394 ret_val = stream->ops->device_control(str_cmd, &str_id);
395 if (!ret_val)
396 sst_set_stream_status(stream, status);
397
398 return ret_val;
399}
400
401
402static snd_pcm_uframes_t sst_platform_pcm_pointer
403 (struct snd_pcm_substream *substream)
404{
405 struct sst_runtime_stream *stream;
406 int ret_val, status;
407 struct pcm_stream_info *str_info;
408
409 stream = substream->runtime->private_data;
410 status = sst_get_stream_status(stream);
411 if (status == SST_PLATFORM_INIT)
412 return 0;
413 str_info = &stream->stream_info;
414 ret_val = stream->ops->device_control(
415 SST_SND_BUFFER_POINTER, str_info);
416 if (ret_val) {
417 pr_err("sst: error code = %d\n", ret_val);
418 return ret_val;
419 }
420 return stream->stream_info.buffer_ptr;
421}
422
423static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
424 struct snd_pcm_hw_params *params)
425{
426 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
427 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
428
429 return 0;
430}
431
432static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
433{
434 return snd_pcm_lib_free_pages(substream);
435}
436
437static struct snd_pcm_ops sst_platform_ops = {
438 .open = sst_platform_open,
439 .close = sst_platform_close,
440 .ioctl = snd_pcm_lib_ioctl,
441 .prepare = sst_platform_pcm_prepare,
442 .trigger = sst_platform_pcm_trigger,
443 .pointer = sst_platform_pcm_pointer,
444 .hw_params = sst_platform_pcm_hw_params,
445 .hw_free = sst_platform_pcm_hw_free,
446};
447
448static void sst_pcm_free(struct snd_pcm *pcm)
449{
450 pr_debug("sst_pcm_free called\n");
451 snd_pcm_lib_preallocate_free_for_all(pcm);
452}
453
454static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
455{
456 struct snd_pcm *pcm = rtd->pcm;
457 int retval = 0;
458
459 pr_debug("sst_pcm_new called\n");
460 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
461 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
462 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
463 SNDRV_DMA_TYPE_CONTINUOUS,
464 snd_dma_continuous_data(GFP_KERNEL),
465 SST_MIN_BUFFER, SST_MAX_BUFFER);
466 if (retval) {
467 pr_err("dma buffer allocationf fail\n");
468 return retval;
469 }
470 }
471 return retval;
472}
473
474/* compress stream operations */
475static void sst_compr_fragment_elapsed(void *arg)
476{
477 struct snd_compr_stream *cstream = (struct snd_compr_stream *)arg;
478
479 pr_debug("fragment elapsed by driver\n");
480 if (cstream)
481 snd_compr_fragment_elapsed(cstream);
482}
483
484static int sst_platform_compr_open(struct snd_compr_stream *cstream)
485{
486
487 int ret_val = 0;
488 struct snd_compr_runtime *runtime = cstream->runtime;
489 struct sst_runtime_stream *stream;
490
491 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
492 if (!stream)
493 return -ENOMEM;
494
495 spin_lock_init(&stream->status_lock);
496
497 /* get the sst ops */
498 if (!sst || !try_module_get(sst->dev->driver->owner)) {
499 pr_err("no device available to run\n");
500 ret_val = -ENODEV;
501 goto out_ops;
502 }
503 stream->compr_ops = sst->compr_ops;
504
505 stream->id = 0;
506 sst_set_stream_status(stream, SST_PLATFORM_INIT);
507 runtime->private_data = stream;
508 return 0;
509out_ops:
510 kfree(stream);
511 return ret_val;
512}
513
514static int sst_platform_compr_free(struct snd_compr_stream *cstream)
515{
516 struct sst_runtime_stream *stream;
517 int ret_val = 0, str_id;
518
519 stream = cstream->runtime->private_data;
520 /*need to check*/
521 str_id = stream->id;
522 if (str_id)
523 ret_val = stream->compr_ops->close(str_id);
524 module_put(sst->dev->driver->owner);
525 kfree(stream);
526 pr_debug("%s: %d\n", __func__, ret_val);
527 return 0;
528}
529
530static int sst_platform_compr_set_params(struct snd_compr_stream *cstream,
531 struct snd_compr_params *params)
532{
533 struct sst_runtime_stream *stream;
534 int retval;
535 struct snd_sst_params str_params;
536 struct sst_compress_cb cb;
537
538 stream = cstream->runtime->private_data;
539 /* construct fw structure for this*/
540 memset(&str_params, 0, sizeof(str_params));
541
542 str_params.ops = STREAM_OPS_PLAYBACK;
543 str_params.stream_type = SST_STREAM_TYPE_MUSIC;
544 str_params.device_type = SND_SST_DEVICE_COMPRESS;
545
546 switch (params->codec.id) {
547 case SND_AUDIOCODEC_MP3: {
548 str_params.codec = SST_CODEC_TYPE_MP3;
549 str_params.sparams.uc.mp3_params.codec = SST_CODEC_TYPE_MP3;
550 str_params.sparams.uc.mp3_params.num_chan = params->codec.ch_in;
551 str_params.sparams.uc.mp3_params.pcm_wd_sz = 16;
552 break;
553 }
554
555 case SND_AUDIOCODEC_AAC: {
556 str_params.codec = SST_CODEC_TYPE_AAC;
557 str_params.sparams.uc.aac_params.codec = SST_CODEC_TYPE_AAC;
558 str_params.sparams.uc.aac_params.num_chan = params->codec.ch_in;
559 str_params.sparams.uc.aac_params.pcm_wd_sz = 16;
560 if (params->codec.format == SND_AUDIOSTREAMFORMAT_MP4ADTS)
561 str_params.sparams.uc.aac_params.bs_format =
562 AAC_BIT_STREAM_ADTS;
563 else if (params->codec.format == SND_AUDIOSTREAMFORMAT_RAW)
564 str_params.sparams.uc.aac_params.bs_format =
565 AAC_BIT_STREAM_RAW;
566 else {
567 pr_err("Undefined format%d\n", params->codec.format);
568 return -EINVAL;
569 }
570 str_params.sparams.uc.aac_params.externalsr =
571 params->codec.sample_rate;
572 break;
573 }
574
575 default:
576 pr_err("codec not supported, id =%d\n", params->codec.id);
577 return -EINVAL;
578 }
579
580 str_params.aparams.ring_buf_info[0].addr =
581 virt_to_phys(cstream->runtime->buffer);
582 str_params.aparams.ring_buf_info[0].size =
583 cstream->runtime->buffer_size;
584 str_params.aparams.sg_count = 1;
585 str_params.aparams.frag_size = cstream->runtime->fragment_size;
586
587 cb.param = cstream;
588 cb.compr_cb = sst_compr_fragment_elapsed;
589
590 retval = stream->compr_ops->open(&str_params, &cb);
591 if (retval < 0) {
592 pr_err("stream allocation failed %d\n", retval);
593 return retval;
594 }
595
596 stream->id = retval;
597 return 0;
598}
599
600static int sst_platform_compr_trigger(struct snd_compr_stream *cstream, int cmd)
601{
602 struct sst_runtime_stream *stream =
603 cstream->runtime->private_data;
604
605 return stream->compr_ops->control(cmd, stream->id);
606}
607
608static int sst_platform_compr_pointer(struct snd_compr_stream *cstream,
609 struct snd_compr_tstamp *tstamp)
610{
611 struct sst_runtime_stream *stream;
612
613 stream = cstream->runtime->private_data;
614 stream->compr_ops->tstamp(stream->id, tstamp);
615 tstamp->byte_offset = tstamp->copied_total %
616 (u32)cstream->runtime->buffer_size;
617 pr_debug("calc bytes offset/copied bytes as %d\n", tstamp->byte_offset);
618 return 0;
619}
620
621static int sst_platform_compr_ack(struct snd_compr_stream *cstream,
622 size_t bytes)
623{
624 struct sst_runtime_stream *stream;
625
626 stream = cstream->runtime->private_data;
627 stream->compr_ops->ack(stream->id, (unsigned long)bytes);
628 stream->bytes_written += bytes;
629
630 return 0;
631}
632
633static int sst_platform_compr_get_caps(struct snd_compr_stream *cstream,
634 struct snd_compr_caps *caps)
635{
636 struct sst_runtime_stream *stream =
637 cstream->runtime->private_data;
638
639 return stream->compr_ops->get_caps(caps);
640}
641
642static int sst_platform_compr_get_codec_caps(struct snd_compr_stream *cstream,
643 struct snd_compr_codec_caps *codec)
644{
645 struct sst_runtime_stream *stream =
646 cstream->runtime->private_data;
647
648 return stream->compr_ops->get_codec_caps(codec);
649}
650
651static int sst_platform_compr_set_metadata(struct snd_compr_stream *cstream,
652 struct snd_compr_metadata *metadata)
653{
654 struct sst_runtime_stream *stream =
655 cstream->runtime->private_data;
656
657 return stream->compr_ops->set_metadata(stream->id, metadata);
658}
659
660static struct snd_compr_ops sst_platform_compr_ops = {
661
662 .open = sst_platform_compr_open,
663 .free = sst_platform_compr_free,
664 .set_params = sst_platform_compr_set_params,
665 .set_metadata = sst_platform_compr_set_metadata,
666 .trigger = sst_platform_compr_trigger,
667 .pointer = sst_platform_compr_pointer,
668 .ack = sst_platform_compr_ack,
669 .get_caps = sst_platform_compr_get_caps,
670 .get_codec_caps = sst_platform_compr_get_codec_caps,
671};
672
673static struct snd_soc_platform_driver sst_soc_platform_drv = {
674 .ops = &sst_platform_ops,
675 .compr_ops = &sst_platform_compr_ops,
676 .pcm_new = sst_pcm_new,
677 .pcm_free = sst_pcm_free,
678};
679
680static int sst_platform_probe(struct platform_device *pdev)
681{
682 int ret;
683
684 pr_debug("sst_platform_probe called\n");
685 sst = NULL;
686 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
687 if (ret) {
688 pr_err("registering soc platform failed\n");
689 return ret;
690 }
691
692 ret = snd_soc_register_component(&pdev->dev, &sst_component,
693 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
694 if (ret) {
695 pr_err("registering cpu dais failed\n");
696 snd_soc_unregister_platform(&pdev->dev);
697 }
698 return ret;
699}
700
701static int sst_platform_remove(struct platform_device *pdev)
702{
703
704 snd_soc_unregister_component(&pdev->dev);
705 snd_soc_unregister_platform(&pdev->dev);
706 pr_debug("sst_platform_remove success\n");
707 return 0;
708}
709
710static struct platform_driver sst_platform_driver = {
711 .driver = {
712 .name = "sst-mfld-platform",
713 .owner = THIS_MODULE,
714 },
715 .probe = sst_platform_probe,
716 .remove = sst_platform_remove,
717};
718
719module_platform_driver(sst_platform_driver);
720
721MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
722MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
723MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
724MODULE_LICENSE("GPL v2");
725MODULE_ALIAS("platform:sst-mfld-platform");