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TOMOYO Linux Cross Reference
Linux/sound/soc/intel/atom/sst-mfld-platform-pcm.c

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  1 /*
  2  *  sst_mfld_platform.c - Intel MID Platform driver
  3  *
  4  *  Copyright (C) 2010-2014 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  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 19  */
 20 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 21 
 22 #include <linux/slab.h>
 23 #include <linux/io.h>
 24 #include <linux/module.h>
 25 #include <sound/core.h>
 26 #include <sound/pcm.h>
 27 #include <sound/pcm_params.h>
 28 #include <sound/soc.h>
 29 #include <sound/compress_driver.h>
 30 #include <asm/platform_sst_audio.h>
 31 #include "sst-mfld-platform.h"
 32 #include "sst-atom-controls.h"
 33 
 34 struct sst_device *sst;
 35 static DEFINE_MUTEX(sst_lock);
 36 
 37 int sst_register_dsp(struct sst_device *dev)
 38 {
 39         if (WARN_ON(!dev))
 40                 return -EINVAL;
 41         if (!try_module_get(dev->dev->driver->owner))
 42                 return -ENODEV;
 43         mutex_lock(&sst_lock);
 44         if (sst) {
 45                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
 46                 module_put(dev->dev->driver->owner);
 47                 mutex_unlock(&sst_lock);
 48                 return -EEXIST;
 49         }
 50         dev_dbg(dev->dev, "registering device %s\n", dev->name);
 51         sst = dev;
 52         mutex_unlock(&sst_lock);
 53         return 0;
 54 }
 55 EXPORT_SYMBOL_GPL(sst_register_dsp);
 56 
 57 int sst_unregister_dsp(struct sst_device *dev)
 58 {
 59         if (WARN_ON(!dev))
 60                 return -EINVAL;
 61         if (dev != sst)
 62                 return -EINVAL;
 63 
 64         mutex_lock(&sst_lock);
 65 
 66         if (!sst) {
 67                 mutex_unlock(&sst_lock);
 68                 return -EIO;
 69         }
 70 
 71         module_put(sst->dev->driver->owner);
 72         dev_dbg(dev->dev, "unreg %s\n", sst->name);
 73         sst = NULL;
 74         mutex_unlock(&sst_lock);
 75         return 0;
 76 }
 77 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
 78 
 79 static const struct snd_pcm_hardware sst_platform_pcm_hw = {
 80         .info = (SNDRV_PCM_INFO_INTERLEAVED |
 81                         SNDRV_PCM_INFO_DOUBLE |
 82                         SNDRV_PCM_INFO_PAUSE |
 83                         SNDRV_PCM_INFO_RESUME |
 84                         SNDRV_PCM_INFO_MMAP|
 85                         SNDRV_PCM_INFO_MMAP_VALID |
 86                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
 87                         SNDRV_PCM_INFO_SYNC_START),
 88         .buffer_bytes_max = SST_MAX_BUFFER,
 89         .period_bytes_min = SST_MIN_PERIOD_BYTES,
 90         .period_bytes_max = SST_MAX_PERIOD_BYTES,
 91         .periods_min = SST_MIN_PERIODS,
 92         .periods_max = SST_MAX_PERIODS,
 93         .fifo_size = SST_FIFO_SIZE,
 94 };
 95 
 96 static struct sst_dev_stream_map dpcm_strm_map[] = {
 97         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
 98         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
 99         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
100         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
101         {MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0},
102 };
103 
104 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
105 {
106 
107         return sst_send_pipe_gains(dai, stream, mute);
108 }
109 
110 /* helper functions */
111 void sst_set_stream_status(struct sst_runtime_stream *stream,
112                                         int state)
113 {
114         unsigned long flags;
115         spin_lock_irqsave(&stream->status_lock, flags);
116         stream->stream_status = state;
117         spin_unlock_irqrestore(&stream->status_lock, flags);
118 }
119 
120 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
121 {
122         int state;
123         unsigned long flags;
124 
125         spin_lock_irqsave(&stream->status_lock, flags);
126         state = stream->stream_status;
127         spin_unlock_irqrestore(&stream->status_lock, flags);
128         return state;
129 }
130 
131 static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
132                                 struct snd_sst_alloc_params_ext *alloc_param)
133 {
134         unsigned int channels;
135         snd_pcm_uframes_t period_size;
136         ssize_t periodbytes;
137         ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
138         u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
139 
140         channels = substream->runtime->channels;
141         period_size = substream->runtime->period_size;
142         periodbytes = samples_to_bytes(substream->runtime, period_size);
143         alloc_param->ring_buf_info[0].addr = buffer_addr;
144         alloc_param->ring_buf_info[0].size = buffer_bytes;
145         alloc_param->sg_count = 1;
146         alloc_param->reserved = 0;
147         alloc_param->frag_size = periodbytes * channels;
148 
149 }
150 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
151                                 struct snd_sst_stream_params *param)
152 {
153         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
154         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
155         param->uc.pcm_params.sfreq = substream->runtime->rate;
156 
157         /* PCM stream via ALSA interface */
158         param->uc.pcm_params.use_offload_path = 0;
159         param->uc.pcm_params.reserved2 = 0;
160         memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
161 
162 }
163 
164 static int sst_get_stream_mapping(int dev, int sdev, int dir,
165         struct sst_dev_stream_map *map, int size)
166 {
167         int i;
168 
169         if (map == NULL)
170                 return -EINVAL;
171 
172 
173         /* index 0 is not used in stream map */
174         for (i = 1; i < size; i++) {
175                 if ((map[i].dev_num == dev) && (map[i].direction == dir))
176                         return i;
177         }
178         return 0;
179 }
180 
181 int sst_fill_stream_params(void *substream,
182         const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
183 {
184         int map_size;
185         int index;
186         struct sst_dev_stream_map *map;
187         struct snd_pcm_substream *pstream = NULL;
188         struct snd_compr_stream *cstream = NULL;
189 
190         map = ctx->pdata->pdev_strm_map;
191         map_size = ctx->pdata->strm_map_size;
192 
193         if (is_compress == true)
194                 cstream = (struct snd_compr_stream *)substream;
195         else
196                 pstream = (struct snd_pcm_substream *)substream;
197 
198         str_params->stream_type = SST_STREAM_TYPE_MUSIC;
199 
200         /* For pcm streams */
201         if (pstream) {
202                 index = sst_get_stream_mapping(pstream->pcm->device,
203                                           pstream->number, pstream->stream,
204                                           map, map_size);
205                 if (index <= 0)
206                         return -EINVAL;
207 
208                 str_params->stream_id = index;
209                 str_params->device_type = map[index].device_id;
210                 str_params->task = map[index].task_id;
211 
212                 str_params->ops = (u8)pstream->stream;
213         }
214 
215         if (cstream) {
216                 index = sst_get_stream_mapping(cstream->device->device,
217                                                0, cstream->direction,
218                                                map, map_size);
219                 if (index <= 0)
220                         return -EINVAL;
221                 str_params->stream_id = index;
222                 str_params->device_type = map[index].device_id;
223                 str_params->task = map[index].task_id;
224 
225                 str_params->ops = (u8)cstream->direction;
226         }
227         return 0;
228 }
229 
230 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
231                 struct snd_soc_dai *dai)
232 {
233         struct sst_runtime_stream *stream =
234                         substream->runtime->private_data;
235         struct snd_sst_stream_params param = {{{0,},},};
236         struct snd_sst_params str_params = {0};
237         struct snd_sst_alloc_params_ext alloc_params = {0};
238         int ret_val = 0;
239         struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
240 
241         /* set codec params and inform SST driver the same */
242         sst_fill_pcm_params(substream, &param);
243         sst_fill_alloc_params(substream, &alloc_params);
244         substream->runtime->dma_area = substream->dma_buffer.area;
245         str_params.sparams = param;
246         str_params.aparams = alloc_params;
247         str_params.codec = SST_CODEC_TYPE_PCM;
248 
249         /* fill the device type and stream id to pass to SST driver */
250         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
251         if (ret_val < 0)
252                 return ret_val;
253 
254         stream->stream_info.str_id = str_params.stream_id;
255 
256         ret_val = stream->ops->open(sst->dev, &str_params);
257         if (ret_val <= 0)
258                 return ret_val;
259 
260 
261         return ret_val;
262 }
263 
264 static void sst_period_elapsed(void *arg)
265 {
266         struct snd_pcm_substream *substream = arg;
267         struct sst_runtime_stream *stream;
268         int status;
269 
270         if (!substream || !substream->runtime)
271                 return;
272         stream = substream->runtime->private_data;
273         if (!stream)
274                 return;
275         status = sst_get_stream_status(stream);
276         if (status != SST_PLATFORM_RUNNING)
277                 return;
278         snd_pcm_period_elapsed(substream);
279 }
280 
281 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
282 {
283         struct sst_runtime_stream *stream =
284                         substream->runtime->private_data;
285         struct snd_soc_pcm_runtime *rtd = substream->private_data;
286         int ret_val;
287 
288         dev_dbg(rtd->dev, "setting buffer ptr param\n");
289         sst_set_stream_status(stream, SST_PLATFORM_INIT);
290         stream->stream_info.period_elapsed = sst_period_elapsed;
291         stream->stream_info.arg = substream;
292         stream->stream_info.buffer_ptr = 0;
293         stream->stream_info.sfreq = substream->runtime->rate;
294         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
295         if (ret_val)
296                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
297         return ret_val;
298 
299 }
300 
301 static int power_up_sst(struct sst_runtime_stream *stream)
302 {
303         return stream->ops->power(sst->dev, true);
304 }
305 
306 static void power_down_sst(struct sst_runtime_stream *stream)
307 {
308         stream->ops->power(sst->dev, false);
309 }
310 
311 static int sst_media_open(struct snd_pcm_substream *substream,
312                 struct snd_soc_dai *dai)
313 {
314         int ret_val = 0;
315         struct snd_pcm_runtime *runtime = substream->runtime;
316         struct sst_runtime_stream *stream;
317 
318         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
319         if (!stream)
320                 return -ENOMEM;
321         spin_lock_init(&stream->status_lock);
322 
323         /* get the sst ops */
324         mutex_lock(&sst_lock);
325         if (!sst ||
326             !try_module_get(sst->dev->driver->owner)) {
327                 dev_err(dai->dev, "no device available to run\n");
328                 ret_val = -ENODEV;
329                 goto out_ops;
330         }
331         stream->ops = sst->ops;
332         mutex_unlock(&sst_lock);
333 
334         stream->stream_info.str_id = 0;
335 
336         stream->stream_info.arg = substream;
337         /* allocate memory for SST API set */
338         runtime->private_data = stream;
339 
340         ret_val = power_up_sst(stream);
341         if (ret_val < 0)
342                 return ret_val;
343 
344         /* Make sure, that the period size is always even */
345         snd_pcm_hw_constraint_step(substream->runtime, 0,
346                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
347 
348         return snd_pcm_hw_constraint_integer(runtime,
349                          SNDRV_PCM_HW_PARAM_PERIODS);
350 out_ops:
351         kfree(stream);
352         mutex_unlock(&sst_lock);
353         return ret_val;
354 }
355 
356 static void sst_media_close(struct snd_pcm_substream *substream,
357                 struct snd_soc_dai *dai)
358 {
359         struct sst_runtime_stream *stream;
360         int str_id;
361 
362         stream = substream->runtime->private_data;
363         power_down_sst(stream);
364 
365         str_id = stream->stream_info.str_id;
366         if (str_id)
367                 stream->ops->close(sst->dev, str_id);
368         module_put(sst->dev->driver->owner);
369         kfree(stream);
370 }
371 
372 static int sst_media_prepare(struct snd_pcm_substream *substream,
373                 struct snd_soc_dai *dai)
374 {
375         struct sst_runtime_stream *stream;
376         int ret_val = 0, str_id;
377 
378         stream = substream->runtime->private_data;
379         str_id = stream->stream_info.str_id;
380         if (stream->stream_info.str_id) {
381                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
382                 return ret_val;
383         }
384 
385         ret_val = sst_platform_alloc_stream(substream, dai);
386         if (ret_val <= 0)
387                 return ret_val;
388         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
389                         "%d", stream->stream_info.str_id);
390 
391         ret_val = sst_platform_init_stream(substream);
392         if (ret_val)
393                 return ret_val;
394         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
395         return ret_val;
396 }
397 
398 static int sst_media_hw_params(struct snd_pcm_substream *substream,
399                                 struct snd_pcm_hw_params *params,
400                                 struct snd_soc_dai *dai)
401 {
402         int ret;
403 
404         ret =
405                 snd_pcm_lib_malloc_pages(substream,
406                                 params_buffer_bytes(params));
407         if (ret)
408                 return ret;
409         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
410         return 0;
411 }
412 
413 static int sst_media_hw_free(struct snd_pcm_substream *substream,
414                 struct snd_soc_dai *dai)
415 {
416         return snd_pcm_lib_free_pages(substream);
417 }
418 
419 static int sst_enable_ssp(struct snd_pcm_substream *substream,
420                         struct snd_soc_dai *dai)
421 {
422         int ret = 0;
423 
424         if (!dai->active) {
425                 ret = sst_handle_vb_timer(dai, true);
426                 sst_fill_ssp_defaults(dai);
427         }
428         return ret;
429 }
430 
431 static int sst_be_hw_params(struct snd_pcm_substream *substream,
432                                 struct snd_pcm_hw_params *params,
433                                 struct snd_soc_dai *dai)
434 {
435         int ret = 0;
436 
437         if (dai->active == 1)
438                 ret = send_ssp_cmd(dai, dai->name, 1);
439         return ret;
440 }
441 
442 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
443 {
444         int ret = 0;
445 
446         if (!dai->active)
447                 return 0;
448 
449         ret = sst_fill_ssp_config(dai, fmt);
450         if (ret < 0)
451                 dev_err(dai->dev, "sst_set_format failed..\n");
452 
453         return ret;
454 }
455 
456 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
457                         unsigned int tx_mask, unsigned int rx_mask,
458                         int slots, int slot_width) {
459         int ret = 0;
460 
461         if (!dai->active)
462                 return ret;
463 
464         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
465         if (ret < 0)
466                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
467 
468         return ret;
469 }
470 
471 static void sst_disable_ssp(struct snd_pcm_substream *substream,
472                         struct snd_soc_dai *dai)
473 {
474         if (!dai->active) {
475                 send_ssp_cmd(dai, dai->name, 0);
476                 sst_handle_vb_timer(dai, false);
477         }
478 }
479 
480 static const struct snd_soc_dai_ops sst_media_dai_ops = {
481         .startup = sst_media_open,
482         .shutdown = sst_media_close,
483         .prepare = sst_media_prepare,
484         .hw_params = sst_media_hw_params,
485         .hw_free = sst_media_hw_free,
486         .mute_stream = sst_media_digital_mute,
487 };
488 
489 static const struct snd_soc_dai_ops sst_compr_dai_ops = {
490         .mute_stream = sst_media_digital_mute,
491 };
492 
493 static const struct snd_soc_dai_ops sst_be_dai_ops = {
494         .startup = sst_enable_ssp,
495         .hw_params = sst_be_hw_params,
496         .set_fmt = sst_set_format,
497         .set_tdm_slot = sst_platform_set_ssp_slot,
498         .shutdown = sst_disable_ssp,
499 };
500 
501 static struct snd_soc_dai_driver sst_platform_dai[] = {
502 {
503         .name = "media-cpu-dai",
504         .ops = &sst_media_dai_ops,
505         .playback = {
506                 .stream_name = "Headset Playback",
507                 .channels_min = SST_STEREO,
508                 .channels_max = SST_STEREO,
509                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
510                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
511         },
512         .capture = {
513                 .stream_name = "Headset Capture",
514                 .channels_min = 1,
515                 .channels_max = 2,
516                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
517                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
518         },
519 },
520 {
521         .name = "deepbuffer-cpu-dai",
522         .ops = &sst_media_dai_ops,
523         .playback = {
524                 .stream_name = "Deepbuffer Playback",
525                 .channels_min = SST_STEREO,
526                 .channels_max = SST_STEREO,
527                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
528                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
529         },
530 },
531 {
532         .name = "compress-cpu-dai",
533         .compress_new = snd_soc_new_compress,
534         .ops = &sst_compr_dai_ops,
535         .playback = {
536                 .stream_name = "Compress Playback",
537                 .channels_min = 1,
538         },
539 },
540 /* BE CPU  Dais */
541 {
542         .name = "ssp0-port",
543         .ops = &sst_be_dai_ops,
544         .playback = {
545                 .stream_name = "ssp0 Tx",
546                 .channels_min = SST_STEREO,
547                 .channels_max = SST_STEREO,
548                 .rates = SNDRV_PCM_RATE_48000,
549                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
550         },
551         .capture = {
552                 .stream_name = "ssp0 Rx",
553                 .channels_min = SST_STEREO,
554                 .channels_max = SST_STEREO,
555                 .rates = SNDRV_PCM_RATE_48000,
556                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
557         },
558 },
559 {
560         .name = "ssp1-port",
561         .ops = &sst_be_dai_ops,
562         .playback = {
563                 .stream_name = "ssp1 Tx",
564                 .channels_min = SST_STEREO,
565                 .channels_max = SST_STEREO,
566                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
567                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
568         },
569         .capture = {
570                 .stream_name = "ssp1 Rx",
571                 .channels_min = SST_STEREO,
572                 .channels_max = SST_STEREO,
573                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
574                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
575         },
576 },
577 {
578         .name = "ssp2-port",
579         .ops = &sst_be_dai_ops,
580         .playback = {
581                 .stream_name = "ssp2 Tx",
582                 .channels_min = SST_STEREO,
583                 .channels_max = SST_STEREO,
584                 .rates = SNDRV_PCM_RATE_48000,
585                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
586         },
587         .capture = {
588                 .stream_name = "ssp2 Rx",
589                 .channels_min = SST_STEREO,
590                 .channels_max = SST_STEREO,
591                 .rates = SNDRV_PCM_RATE_48000,
592                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
593         },
594 },
595 };
596 
597 static int sst_platform_open(struct snd_pcm_substream *substream)
598 {
599         struct snd_pcm_runtime *runtime;
600 
601         if (substream->pcm->internal)
602                 return 0;
603 
604         runtime = substream->runtime;
605         runtime->hw = sst_platform_pcm_hw;
606         return 0;
607 }
608 
609 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
610                                         int cmd)
611 {
612         int ret_val = 0, str_id;
613         struct sst_runtime_stream *stream;
614         int status;
615         struct snd_soc_pcm_runtime *rtd = substream->private_data;
616 
617         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
618         if (substream->pcm->internal)
619                 return 0;
620         stream = substream->runtime->private_data;
621         str_id = stream->stream_info.str_id;
622         switch (cmd) {
623         case SNDRV_PCM_TRIGGER_START:
624                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
625                 status = SST_PLATFORM_RUNNING;
626                 stream->stream_info.arg = substream;
627                 ret_val = stream->ops->stream_start(sst->dev, str_id);
628                 break;
629         case SNDRV_PCM_TRIGGER_STOP:
630                 dev_dbg(rtd->dev, "sst: in stop\n");
631                 status = SST_PLATFORM_DROPPED;
632                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
633                 break;
634         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
635         case SNDRV_PCM_TRIGGER_SUSPEND:
636                 dev_dbg(rtd->dev, "sst: in pause\n");
637                 status = SST_PLATFORM_PAUSED;
638                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
639                 break;
640         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
641         case SNDRV_PCM_TRIGGER_RESUME:
642                 dev_dbg(rtd->dev, "sst: in pause release\n");
643                 status = SST_PLATFORM_RUNNING;
644                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
645                 break;
646         default:
647                 return -EINVAL;
648         }
649 
650         if (!ret_val)
651                 sst_set_stream_status(stream, status);
652 
653         return ret_val;
654 }
655 
656 
657 static snd_pcm_uframes_t sst_platform_pcm_pointer
658                         (struct snd_pcm_substream *substream)
659 {
660         struct sst_runtime_stream *stream;
661         int ret_val, status;
662         struct pcm_stream_info *str_info;
663         struct snd_soc_pcm_runtime *rtd = substream->private_data;
664 
665         stream = substream->runtime->private_data;
666         status = sst_get_stream_status(stream);
667         if (status == SST_PLATFORM_INIT)
668                 return 0;
669         str_info = &stream->stream_info;
670         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
671         if (ret_val) {
672                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
673                 return ret_val;
674         }
675         substream->runtime->delay = str_info->pcm_delay;
676         return str_info->buffer_ptr;
677 }
678 
679 static const struct snd_pcm_ops sst_platform_ops = {
680         .open = sst_platform_open,
681         .ioctl = snd_pcm_lib_ioctl,
682         .trigger = sst_platform_pcm_trigger,
683         .pointer = sst_platform_pcm_pointer,
684 };
685 
686 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
687 {
688         struct snd_soc_dai *dai = rtd->cpu_dai;
689         struct snd_pcm *pcm = rtd->pcm;
690         int retval = 0;
691 
692         if (dai->driver->playback.channels_min ||
693                         dai->driver->capture.channels_min) {
694                 retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
695                         SNDRV_DMA_TYPE_CONTINUOUS,
696                         snd_dma_continuous_data(GFP_DMA),
697                         SST_MIN_BUFFER, SST_MAX_BUFFER);
698                 if (retval) {
699                         dev_err(rtd->dev, "dma buffer allocation failure\n");
700                         return retval;
701                 }
702         }
703         return retval;
704 }
705 
706 static int sst_soc_probe(struct snd_soc_component *component)
707 {
708         struct sst_data *drv = dev_get_drvdata(component->dev);
709 
710         drv->soc_card = component->card;
711         return sst_dsp_init_v2_dpcm(component);
712 }
713 
714 static const struct snd_soc_component_driver sst_soc_platform_drv  = {
715         .name           = DRV_NAME,
716         .probe          = sst_soc_probe,
717         .ops            = &sst_platform_ops,
718         .compr_ops      = &sst_platform_compr_ops,
719         .pcm_new        = sst_pcm_new,
720 };
721 
722 static int sst_platform_probe(struct platform_device *pdev)
723 {
724         struct sst_data *drv;
725         int ret;
726         struct sst_platform_data *pdata;
727 
728         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
729         if (drv == NULL) {
730                 return -ENOMEM;
731         }
732 
733         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
734         if (pdata == NULL) {
735                 return -ENOMEM;
736         }
737 
738         pdata->pdev_strm_map = dpcm_strm_map;
739         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
740         drv->pdata = pdata;
741         drv->pdev = pdev;
742         mutex_init(&drv->lock);
743         dev_set_drvdata(&pdev->dev, drv);
744 
745         ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
746                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
747         if (ret)
748                 dev_err(&pdev->dev, "registering cpu dais failed\n");
749 
750         return ret;
751 }
752 
753 static int sst_platform_remove(struct platform_device *pdev)
754 {
755         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
756         return 0;
757 }
758 
759 #ifdef CONFIG_PM_SLEEP
760 
761 static int sst_soc_prepare(struct device *dev)
762 {
763         struct sst_data *drv = dev_get_drvdata(dev);
764         struct snd_soc_pcm_runtime *rtd;
765 
766         if (!drv->soc_card)
767                 return 0;
768 
769         /* suspend all pcms first */
770         snd_soc_suspend(drv->soc_card->dev);
771         snd_soc_poweroff(drv->soc_card->dev);
772 
773         /* set the SSPs to idle */
774         for_each_card_rtds(drv->soc_card, rtd) {
775                 struct snd_soc_dai *dai = rtd->cpu_dai;
776 
777                 if (dai->active) {
778                         send_ssp_cmd(dai, dai->name, 0);
779                         sst_handle_vb_timer(dai, false);
780                 }
781         }
782 
783         return 0;
784 }
785 
786 static void sst_soc_complete(struct device *dev)
787 {
788         struct sst_data *drv = dev_get_drvdata(dev);
789         struct snd_soc_pcm_runtime *rtd;
790 
791         if (!drv->soc_card)
792                 return;
793 
794         /* restart SSPs */
795         for_each_card_rtds(drv->soc_card, rtd) {
796                 struct snd_soc_dai *dai = rtd->cpu_dai;
797 
798                 if (dai->active) {
799                         sst_handle_vb_timer(dai, true);
800                         send_ssp_cmd(dai, dai->name, 1);
801                 }
802         }
803         snd_soc_resume(drv->soc_card->dev);
804 }
805 
806 #else
807 
808 #define sst_soc_prepare NULL
809 #define sst_soc_complete NULL
810 
811 #endif
812 
813 
814 static const struct dev_pm_ops sst_platform_pm = {
815         .prepare        = sst_soc_prepare,
816         .complete       = sst_soc_complete,
817 };
818 
819 static struct platform_driver sst_platform_driver = {
820         .driver         = {
821                 .name           = "sst-mfld-platform",
822                 .pm             = &sst_platform_pm,
823         },
824         .probe          = sst_platform_probe,
825         .remove         = sst_platform_remove,
826 };
827 
828 module_platform_driver(sst_platform_driver);
829 
830 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
831 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
832 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
833 MODULE_LICENSE("GPL v2");
834 MODULE_ALIAS("platform:sst-atom-hifi2-platform");
835 MODULE_ALIAS("platform:sst-mfld-platform");
836 

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