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

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  *  sst_mfld_platform.c - Intel MID Platform driver
  4  *
  5  *  Copyright (C) 2010-2014 Intel Corp
  6  *  Author: Vinod Koul <vinod.koul@intel.com>
  7  *  Author: Harsha Priya <priya.harsha@intel.com>
  8  *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  9  *
 10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 11  */
 12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 13 
 14 #include <linux/slab.h>
 15 #include <linux/io.h>
 16 #include <linux/module.h>
 17 #include <sound/core.h>
 18 #include <sound/pcm.h>
 19 #include <sound/pcm_params.h>
 20 #include <sound/soc.h>
 21 #include <sound/compress_driver.h>
 22 #include <asm/platform_sst_audio.h>
 23 #include "sst-mfld-platform.h"
 24 #include "sst-atom-controls.h"
 25 
 26 struct sst_device *sst;
 27 static DEFINE_MUTEX(sst_lock);
 28 
 29 int sst_register_dsp(struct sst_device *dev)
 30 {
 31         if (WARN_ON(!dev))
 32                 return -EINVAL;
 33         if (!try_module_get(dev->dev->driver->owner))
 34                 return -ENODEV;
 35         mutex_lock(&sst_lock);
 36         if (sst) {
 37                 dev_err(dev->dev, "we already have a device %s\n", sst->name);
 38                 module_put(dev->dev->driver->owner);
 39                 mutex_unlock(&sst_lock);
 40                 return -EEXIST;
 41         }
 42         dev_dbg(dev->dev, "registering device %s\n", dev->name);
 43         sst = dev;
 44         mutex_unlock(&sst_lock);
 45         return 0;
 46 }
 47 EXPORT_SYMBOL_GPL(sst_register_dsp);
 48 
 49 int sst_unregister_dsp(struct sst_device *dev)
 50 {
 51         if (WARN_ON(!dev))
 52                 return -EINVAL;
 53         if (dev != sst)
 54                 return -EINVAL;
 55 
 56         mutex_lock(&sst_lock);
 57 
 58         if (!sst) {
 59                 mutex_unlock(&sst_lock);
 60                 return -EIO;
 61         }
 62 
 63         module_put(sst->dev->driver->owner);
 64         dev_dbg(dev->dev, "unreg %s\n", sst->name);
 65         sst = NULL;
 66         mutex_unlock(&sst_lock);
 67         return 0;
 68 }
 69 EXPORT_SYMBOL_GPL(sst_unregister_dsp);
 70 
 71 static const struct snd_pcm_hardware sst_platform_pcm_hw = {
 72         .info = (SNDRV_PCM_INFO_INTERLEAVED |
 73                         SNDRV_PCM_INFO_DOUBLE |
 74                         SNDRV_PCM_INFO_PAUSE |
 75                         SNDRV_PCM_INFO_RESUME |
 76                         SNDRV_PCM_INFO_MMAP|
 77                         SNDRV_PCM_INFO_MMAP_VALID |
 78                         SNDRV_PCM_INFO_BLOCK_TRANSFER |
 79                         SNDRV_PCM_INFO_SYNC_START),
 80         .buffer_bytes_max = SST_MAX_BUFFER,
 81         .period_bytes_min = SST_MIN_PERIOD_BYTES,
 82         .period_bytes_max = SST_MAX_PERIOD_BYTES,
 83         .periods_min = SST_MIN_PERIODS,
 84         .periods_max = SST_MAX_PERIODS,
 85         .fifo_size = SST_FIFO_SIZE,
 86 };
 87 
 88 static struct sst_dev_stream_map dpcm_strm_map[] = {
 89         {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
 90         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
 91         {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
 92         {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
 93         {MERR_DPCM_DEEP_BUFFER, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA3_IN, SST_TASK_ID_MEDIA, 0},
 94 };
 95 
 96 static int sst_media_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
 97 {
 98 
 99         return sst_send_pipe_gains(dai, stream, mute);
100 }
101 
102 /* helper functions */
103 void sst_set_stream_status(struct sst_runtime_stream *stream,
104                                         int state)
105 {
106         unsigned long flags;
107         spin_lock_irqsave(&stream->status_lock, flags);
108         stream->stream_status = state;
109         spin_unlock_irqrestore(&stream->status_lock, flags);
110 }
111 
112 static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
113 {
114         int state;
115         unsigned long flags;
116 
117         spin_lock_irqsave(&stream->status_lock, flags);
118         state = stream->stream_status;
119         spin_unlock_irqrestore(&stream->status_lock, flags);
120         return state;
121 }
122 
123 static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
124                                 struct snd_sst_alloc_params_ext *alloc_param)
125 {
126         unsigned int channels;
127         snd_pcm_uframes_t period_size;
128         ssize_t periodbytes;
129         ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
130         u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
131 
132         channels = substream->runtime->channels;
133         period_size = substream->runtime->period_size;
134         periodbytes = samples_to_bytes(substream->runtime, period_size);
135         alloc_param->ring_buf_info[0].addr = buffer_addr;
136         alloc_param->ring_buf_info[0].size = buffer_bytes;
137         alloc_param->sg_count = 1;
138         alloc_param->reserved = 0;
139         alloc_param->frag_size = periodbytes * channels;
140 
141 }
142 static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
143                                 struct snd_sst_stream_params *param)
144 {
145         param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
146         param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
147         param->uc.pcm_params.sfreq = substream->runtime->rate;
148 
149         /* PCM stream via ALSA interface */
150         param->uc.pcm_params.use_offload_path = 0;
151         param->uc.pcm_params.reserved2 = 0;
152         memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
153 
154 }
155 
156 static int sst_get_stream_mapping(int dev, int sdev, int dir,
157         struct sst_dev_stream_map *map, int size)
158 {
159         int i;
160 
161         if (map == NULL)
162                 return -EINVAL;
163 
164 
165         /* index 0 is not used in stream map */
166         for (i = 1; i < size; i++) {
167                 if ((map[i].dev_num == dev) && (map[i].direction == dir))
168                         return i;
169         }
170         return 0;
171 }
172 
173 int sst_fill_stream_params(void *substream,
174         const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
175 {
176         int map_size;
177         int index;
178         struct sst_dev_stream_map *map;
179         struct snd_pcm_substream *pstream = NULL;
180         struct snd_compr_stream *cstream = NULL;
181 
182         map = ctx->pdata->pdev_strm_map;
183         map_size = ctx->pdata->strm_map_size;
184 
185         if (is_compress)
186                 cstream = (struct snd_compr_stream *)substream;
187         else
188                 pstream = (struct snd_pcm_substream *)substream;
189 
190         str_params->stream_type = SST_STREAM_TYPE_MUSIC;
191 
192         /* For pcm streams */
193         if (pstream) {
194                 index = sst_get_stream_mapping(pstream->pcm->device,
195                                           pstream->number, pstream->stream,
196                                           map, map_size);
197                 if (index <= 0)
198                         return -EINVAL;
199 
200                 str_params->stream_id = index;
201                 str_params->device_type = map[index].device_id;
202                 str_params->task = map[index].task_id;
203 
204                 str_params->ops = (u8)pstream->stream;
205         }
206 
207         if (cstream) {
208                 index = sst_get_stream_mapping(cstream->device->device,
209                                                0, cstream->direction,
210                                                map, map_size);
211                 if (index <= 0)
212                         return -EINVAL;
213                 str_params->stream_id = index;
214                 str_params->device_type = map[index].device_id;
215                 str_params->task = map[index].task_id;
216 
217                 str_params->ops = (u8)cstream->direction;
218         }
219         return 0;
220 }
221 
222 static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
223                 struct snd_soc_dai *dai)
224 {
225         struct sst_runtime_stream *stream =
226                         substream->runtime->private_data;
227         struct snd_sst_stream_params param = {{{0,},},};
228         struct snd_sst_params str_params = {0};
229         struct snd_sst_alloc_params_ext alloc_params = {0};
230         int ret_val = 0;
231         struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
232 
233         /* set codec params and inform SST driver the same */
234         sst_fill_pcm_params(substream, &param);
235         sst_fill_alloc_params(substream, &alloc_params);
236         substream->runtime->dma_area = substream->dma_buffer.area;
237         str_params.sparams = param;
238         str_params.aparams = alloc_params;
239         str_params.codec = SST_CODEC_TYPE_PCM;
240 
241         /* fill the device type and stream id to pass to SST driver */
242         ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
243         if (ret_val < 0)
244                 return ret_val;
245 
246         stream->stream_info.str_id = str_params.stream_id;
247 
248         ret_val = stream->ops->open(sst->dev, &str_params);
249         if (ret_val <= 0)
250                 return ret_val;
251 
252 
253         return ret_val;
254 }
255 
256 static void sst_period_elapsed(void *arg)
257 {
258         struct snd_pcm_substream *substream = arg;
259         struct sst_runtime_stream *stream;
260         int status;
261 
262         if (!substream || !substream->runtime)
263                 return;
264         stream = substream->runtime->private_data;
265         if (!stream)
266                 return;
267         status = sst_get_stream_status(stream);
268         if (status != SST_PLATFORM_RUNNING)
269                 return;
270         snd_pcm_period_elapsed(substream);
271 }
272 
273 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
274 {
275         struct sst_runtime_stream *stream =
276                         substream->runtime->private_data;
277         struct snd_soc_pcm_runtime *rtd = substream->private_data;
278         int ret_val;
279 
280         dev_dbg(rtd->dev, "setting buffer ptr param\n");
281         sst_set_stream_status(stream, SST_PLATFORM_INIT);
282         stream->stream_info.period_elapsed = sst_period_elapsed;
283         stream->stream_info.arg = substream;
284         stream->stream_info.buffer_ptr = 0;
285         stream->stream_info.sfreq = substream->runtime->rate;
286         ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
287         if (ret_val)
288                 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
289         return ret_val;
290 
291 }
292 
293 static int power_up_sst(struct sst_runtime_stream *stream)
294 {
295         return stream->ops->power(sst->dev, true);
296 }
297 
298 static void power_down_sst(struct sst_runtime_stream *stream)
299 {
300         stream->ops->power(sst->dev, false);
301 }
302 
303 static int sst_media_open(struct snd_pcm_substream *substream,
304                 struct snd_soc_dai *dai)
305 {
306         int ret_val = 0;
307         struct snd_pcm_runtime *runtime = substream->runtime;
308         struct sst_runtime_stream *stream;
309 
310         stream = kzalloc(sizeof(*stream), GFP_KERNEL);
311         if (!stream)
312                 return -ENOMEM;
313         spin_lock_init(&stream->status_lock);
314 
315         /* get the sst ops */
316         mutex_lock(&sst_lock);
317         if (!sst ||
318             !try_module_get(sst->dev->driver->owner)) {
319                 dev_err(dai->dev, "no device available to run\n");
320                 ret_val = -ENODEV;
321                 goto out_ops;
322         }
323         stream->ops = sst->ops;
324         mutex_unlock(&sst_lock);
325 
326         stream->stream_info.str_id = 0;
327 
328         stream->stream_info.arg = substream;
329         /* allocate memory for SST API set */
330         runtime->private_data = stream;
331 
332         ret_val = power_up_sst(stream);
333         if (ret_val < 0)
334                 return ret_val;
335 
336         /* Make sure, that the period size is always even */
337         snd_pcm_hw_constraint_step(substream->runtime, 0,
338                            SNDRV_PCM_HW_PARAM_PERIODS, 2);
339 
340         return snd_pcm_hw_constraint_integer(runtime,
341                          SNDRV_PCM_HW_PARAM_PERIODS);
342 out_ops:
343         kfree(stream);
344         mutex_unlock(&sst_lock);
345         return ret_val;
346 }
347 
348 static void sst_media_close(struct snd_pcm_substream *substream,
349                 struct snd_soc_dai *dai)
350 {
351         struct sst_runtime_stream *stream;
352         int str_id;
353 
354         stream = substream->runtime->private_data;
355         power_down_sst(stream);
356 
357         str_id = stream->stream_info.str_id;
358         if (str_id)
359                 stream->ops->close(sst->dev, str_id);
360         module_put(sst->dev->driver->owner);
361         kfree(stream);
362 }
363 
364 static int sst_media_prepare(struct snd_pcm_substream *substream,
365                 struct snd_soc_dai *dai)
366 {
367         struct sst_runtime_stream *stream;
368         int ret_val = 0, str_id;
369 
370         stream = substream->runtime->private_data;
371         str_id = stream->stream_info.str_id;
372         if (stream->stream_info.str_id) {
373                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
374                 return ret_val;
375         }
376 
377         ret_val = sst_platform_alloc_stream(substream, dai);
378         if (ret_val <= 0)
379                 return ret_val;
380         snprintf(substream->pcm->id, sizeof(substream->pcm->id),
381                         "%d", stream->stream_info.str_id);
382 
383         ret_val = sst_platform_init_stream(substream);
384         if (ret_val)
385                 return ret_val;
386         substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
387         return ret_val;
388 }
389 
390 static int sst_media_hw_params(struct snd_pcm_substream *substream,
391                                 struct snd_pcm_hw_params *params,
392                                 struct snd_soc_dai *dai)
393 {
394         int ret;
395 
396         ret =
397                 snd_pcm_lib_malloc_pages(substream,
398                                 params_buffer_bytes(params));
399         if (ret)
400                 return ret;
401         memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
402         return 0;
403 }
404 
405 static int sst_media_hw_free(struct snd_pcm_substream *substream,
406                 struct snd_soc_dai *dai)
407 {
408         return snd_pcm_lib_free_pages(substream);
409 }
410 
411 static int sst_enable_ssp(struct snd_pcm_substream *substream,
412                         struct snd_soc_dai *dai)
413 {
414         int ret = 0;
415 
416         if (!dai->active) {
417                 ret = sst_handle_vb_timer(dai, true);
418                 sst_fill_ssp_defaults(dai);
419         }
420         return ret;
421 }
422 
423 static int sst_be_hw_params(struct snd_pcm_substream *substream,
424                                 struct snd_pcm_hw_params *params,
425                                 struct snd_soc_dai *dai)
426 {
427         int ret = 0;
428 
429         if (dai->active == 1)
430                 ret = send_ssp_cmd(dai, dai->name, 1);
431         return ret;
432 }
433 
434 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
435 {
436         int ret = 0;
437 
438         if (!dai->active)
439                 return 0;
440 
441         ret = sst_fill_ssp_config(dai, fmt);
442         if (ret < 0)
443                 dev_err(dai->dev, "sst_set_format failed..\n");
444 
445         return ret;
446 }
447 
448 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
449                         unsigned int tx_mask, unsigned int rx_mask,
450                         int slots, int slot_width) {
451         int ret = 0;
452 
453         if (!dai->active)
454                 return ret;
455 
456         ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
457         if (ret < 0)
458                 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
459 
460         return ret;
461 }
462 
463 static void sst_disable_ssp(struct snd_pcm_substream *substream,
464                         struct snd_soc_dai *dai)
465 {
466         if (!dai->active) {
467                 send_ssp_cmd(dai, dai->name, 0);
468                 sst_handle_vb_timer(dai, false);
469         }
470 }
471 
472 static const struct snd_soc_dai_ops sst_media_dai_ops = {
473         .startup = sst_media_open,
474         .shutdown = sst_media_close,
475         .prepare = sst_media_prepare,
476         .hw_params = sst_media_hw_params,
477         .hw_free = sst_media_hw_free,
478         .mute_stream = sst_media_digital_mute,
479 };
480 
481 static const struct snd_soc_dai_ops sst_compr_dai_ops = {
482         .mute_stream = sst_media_digital_mute,
483 };
484 
485 static const struct snd_soc_dai_ops sst_be_dai_ops = {
486         .startup = sst_enable_ssp,
487         .hw_params = sst_be_hw_params,
488         .set_fmt = sst_set_format,
489         .set_tdm_slot = sst_platform_set_ssp_slot,
490         .shutdown = sst_disable_ssp,
491 };
492 
493 static struct snd_soc_dai_driver sst_platform_dai[] = {
494 {
495         .name = "media-cpu-dai",
496         .ops = &sst_media_dai_ops,
497         .playback = {
498                 .stream_name = "Headset Playback",
499                 .channels_min = SST_STEREO,
500                 .channels_max = SST_STEREO,
501                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
502                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
503         },
504         .capture = {
505                 .stream_name = "Headset Capture",
506                 .channels_min = 1,
507                 .channels_max = 2,
508                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
509                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
510         },
511 },
512 {
513         .name = "deepbuffer-cpu-dai",
514         .ops = &sst_media_dai_ops,
515         .playback = {
516                 .stream_name = "Deepbuffer Playback",
517                 .channels_min = SST_STEREO,
518                 .channels_max = SST_STEREO,
519                 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
520                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
521         },
522 },
523 {
524         .name = "compress-cpu-dai",
525         .compress_new = snd_soc_new_compress,
526         .ops = &sst_compr_dai_ops,
527         .playback = {
528                 .stream_name = "Compress Playback",
529                 .channels_min = 1,
530         },
531 },
532 /* BE CPU  Dais */
533 {
534         .name = "ssp0-port",
535         .ops = &sst_be_dai_ops,
536         .playback = {
537                 .stream_name = "ssp0 Tx",
538                 .channels_min = SST_STEREO,
539                 .channels_max = SST_STEREO,
540                 .rates = SNDRV_PCM_RATE_48000,
541                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
542         },
543         .capture = {
544                 .stream_name = "ssp0 Rx",
545                 .channels_min = SST_STEREO,
546                 .channels_max = SST_STEREO,
547                 .rates = SNDRV_PCM_RATE_48000,
548                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
549         },
550 },
551 {
552         .name = "ssp1-port",
553         .ops = &sst_be_dai_ops,
554         .playback = {
555                 .stream_name = "ssp1 Tx",
556                 .channels_min = SST_STEREO,
557                 .channels_max = SST_STEREO,
558                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
559                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
560         },
561         .capture = {
562                 .stream_name = "ssp1 Rx",
563                 .channels_min = SST_STEREO,
564                 .channels_max = SST_STEREO,
565                 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
566                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
567         },
568 },
569 {
570         .name = "ssp2-port",
571         .ops = &sst_be_dai_ops,
572         .playback = {
573                 .stream_name = "ssp2 Tx",
574                 .channels_min = SST_STEREO,
575                 .channels_max = SST_STEREO,
576                 .rates = SNDRV_PCM_RATE_48000,
577                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
578         },
579         .capture = {
580                 .stream_name = "ssp2 Rx",
581                 .channels_min = SST_STEREO,
582                 .channels_max = SST_STEREO,
583                 .rates = SNDRV_PCM_RATE_48000,
584                 .formats = SNDRV_PCM_FMTBIT_S16_LE,
585         },
586 },
587 };
588 
589 static int sst_platform_open(struct snd_pcm_substream *substream)
590 {
591         struct snd_pcm_runtime *runtime;
592 
593         if (substream->pcm->internal)
594                 return 0;
595 
596         runtime = substream->runtime;
597         runtime->hw = sst_platform_pcm_hw;
598         return 0;
599 }
600 
601 static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
602                                         int cmd)
603 {
604         int ret_val = 0, str_id;
605         struct sst_runtime_stream *stream;
606         int status;
607         struct snd_soc_pcm_runtime *rtd = substream->private_data;
608 
609         dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
610         if (substream->pcm->internal)
611                 return 0;
612         stream = substream->runtime->private_data;
613         str_id = stream->stream_info.str_id;
614         switch (cmd) {
615         case SNDRV_PCM_TRIGGER_START:
616                 dev_dbg(rtd->dev, "sst: Trigger Start\n");
617                 status = SST_PLATFORM_RUNNING;
618                 stream->stream_info.arg = substream;
619                 ret_val = stream->ops->stream_start(sst->dev, str_id);
620                 break;
621         case SNDRV_PCM_TRIGGER_STOP:
622                 dev_dbg(rtd->dev, "sst: in stop\n");
623                 status = SST_PLATFORM_DROPPED;
624                 ret_val = stream->ops->stream_drop(sst->dev, str_id);
625                 break;
626         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
627         case SNDRV_PCM_TRIGGER_SUSPEND:
628                 dev_dbg(rtd->dev, "sst: in pause\n");
629                 status = SST_PLATFORM_PAUSED;
630                 ret_val = stream->ops->stream_pause(sst->dev, str_id);
631                 break;
632         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
633         case SNDRV_PCM_TRIGGER_RESUME:
634                 dev_dbg(rtd->dev, "sst: in pause release\n");
635                 status = SST_PLATFORM_RUNNING;
636                 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
637                 break;
638         default:
639                 return -EINVAL;
640         }
641 
642         if (!ret_val)
643                 sst_set_stream_status(stream, status);
644 
645         return ret_val;
646 }
647 
648 
649 static snd_pcm_uframes_t sst_platform_pcm_pointer
650                         (struct snd_pcm_substream *substream)
651 {
652         struct sst_runtime_stream *stream;
653         int ret_val, status;
654         struct pcm_stream_info *str_info;
655         struct snd_soc_pcm_runtime *rtd = substream->private_data;
656 
657         stream = substream->runtime->private_data;
658         status = sst_get_stream_status(stream);
659         if (status == SST_PLATFORM_INIT)
660                 return 0;
661         str_info = &stream->stream_info;
662         ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
663         if (ret_val) {
664                 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
665                 return ret_val;
666         }
667         substream->runtime->delay = str_info->pcm_delay;
668         return str_info->buffer_ptr;
669 }
670 
671 static const struct snd_pcm_ops sst_platform_ops = {
672         .open = sst_platform_open,
673         .ioctl = snd_pcm_lib_ioctl,
674         .trigger = sst_platform_pcm_trigger,
675         .pointer = sst_platform_pcm_pointer,
676 };
677 
678 static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
679 {
680         struct snd_soc_dai *dai = rtd->cpu_dai;
681         struct snd_pcm *pcm = rtd->pcm;
682 
683         if (dai->driver->playback.channels_min ||
684                         dai->driver->capture.channels_min) {
685                 snd_pcm_lib_preallocate_pages_for_all(pcm,
686                         SNDRV_DMA_TYPE_CONTINUOUS,
687                         snd_dma_continuous_data(GFP_DMA),
688                         SST_MIN_BUFFER, SST_MAX_BUFFER);
689         }
690         return 0;
691 }
692 
693 static int sst_soc_probe(struct snd_soc_component *component)
694 {
695         struct sst_data *drv = dev_get_drvdata(component->dev);
696 
697         drv->soc_card = component->card;
698         return sst_dsp_init_v2_dpcm(component);
699 }
700 
701 static void sst_soc_remove(struct snd_soc_component *component)
702 {
703         struct sst_data *drv = dev_get_drvdata(component->dev);
704 
705         drv->soc_card = NULL;
706 }
707 
708 static const struct snd_soc_component_driver sst_soc_platform_drv  = {
709         .name           = DRV_NAME,
710         .probe          = sst_soc_probe,
711         .remove         = sst_soc_remove,
712         .ops            = &sst_platform_ops,
713         .compr_ops      = &sst_platform_compr_ops,
714         .pcm_new        = sst_pcm_new,
715 };
716 
717 static int sst_platform_probe(struct platform_device *pdev)
718 {
719         struct sst_data *drv;
720         int ret;
721         struct sst_platform_data *pdata;
722 
723         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
724         if (drv == NULL) {
725                 return -ENOMEM;
726         }
727 
728         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
729         if (pdata == NULL) {
730                 return -ENOMEM;
731         }
732 
733         pdata->pdev_strm_map = dpcm_strm_map;
734         pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
735         drv->pdata = pdata;
736         drv->pdev = pdev;
737         mutex_init(&drv->lock);
738         dev_set_drvdata(&pdev->dev, drv);
739 
740         ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
741                                 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
742         if (ret)
743                 dev_err(&pdev->dev, "registering cpu dais failed\n");
744 
745         return ret;
746 }
747 
748 static int sst_platform_remove(struct platform_device *pdev)
749 {
750         dev_dbg(&pdev->dev, "sst_platform_remove success\n");
751         return 0;
752 }
753 
754 #ifdef CONFIG_PM_SLEEP
755 
756 static int sst_soc_prepare(struct device *dev)
757 {
758         struct sst_data *drv = dev_get_drvdata(dev);
759         struct snd_soc_pcm_runtime *rtd;
760 
761         if (!drv->soc_card)
762                 return 0;
763 
764         /* suspend all pcms first */
765         snd_soc_suspend(drv->soc_card->dev);
766         snd_soc_poweroff(drv->soc_card->dev);
767 
768         /* set the SSPs to idle */
769         for_each_card_rtds(drv->soc_card, rtd) {
770                 struct snd_soc_dai *dai = rtd->cpu_dai;
771 
772                 if (dai->active) {
773                         send_ssp_cmd(dai, dai->name, 0);
774                         sst_handle_vb_timer(dai, false);
775                 }
776         }
777 
778         return 0;
779 }
780 
781 static void sst_soc_complete(struct device *dev)
782 {
783         struct sst_data *drv = dev_get_drvdata(dev);
784         struct snd_soc_pcm_runtime *rtd;
785 
786         if (!drv->soc_card)
787                 return;
788 
789         /* restart SSPs */
790         for_each_card_rtds(drv->soc_card, rtd) {
791                 struct snd_soc_dai *dai = rtd->cpu_dai;
792 
793                 if (dai->active) {
794                         sst_handle_vb_timer(dai, true);
795                         send_ssp_cmd(dai, dai->name, 1);
796                 }
797         }
798         snd_soc_resume(drv->soc_card->dev);
799 }
800 
801 #else
802 
803 #define sst_soc_prepare NULL
804 #define sst_soc_complete NULL
805 
806 #endif
807 
808 
809 static const struct dev_pm_ops sst_platform_pm = {
810         .prepare        = sst_soc_prepare,
811         .complete       = sst_soc_complete,
812 };
813 
814 static struct platform_driver sst_platform_driver = {
815         .driver         = {
816                 .name           = "sst-mfld-platform",
817                 .pm             = &sst_platform_pm,
818         },
819         .probe          = sst_platform_probe,
820         .remove         = sst_platform_remove,
821 };
822 
823 module_platform_driver(sst_platform_driver);
824 
825 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
826 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
827 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
828 MODULE_LICENSE("GPL v2");
829 MODULE_ALIAS("platform:sst-atom-hifi2-platform");
830 MODULE_ALIAS("platform:sst-mfld-platform");
831 

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