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 = substream->runtime->dma_addr;
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, ¶m);
235 sst_fill_alloc_params(substream, &alloc_params);
236 str_params.sparams = param;
237 str_params.aparams = alloc_params;
238 str_params.codec = SST_CODEC_TYPE_PCM;
239
240 /* fill the device type and stream id to pass to SST driver */
241 ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
242 if (ret_val < 0)
243 return ret_val;
244
245 stream->stream_info.str_id = str_params.stream_id;
246
247 ret_val = stream->ops->open(sst->dev, &str_params);
248 if (ret_val <= 0)
249 return ret_val;
250
251
252 return ret_val;
253 }
254
255 static void sst_period_elapsed(void *arg)
256 {
257 struct snd_pcm_substream *substream = arg;
258 struct sst_runtime_stream *stream;
259 int status;
260
261 if (!substream || !substream->runtime)
262 return;
263 stream = substream->runtime->private_data;
264 if (!stream)
265 return;
266 status = sst_get_stream_status(stream);
267 if (status != SST_PLATFORM_RUNNING)
268 return;
269 snd_pcm_period_elapsed(substream);
270 }
271
272 static int sst_platform_init_stream(struct snd_pcm_substream *substream)
273 {
274 struct sst_runtime_stream *stream =
275 substream->runtime->private_data;
276 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
277 int ret_val;
278
279 dev_dbg(rtd->dev, "setting buffer ptr param\n");
280 sst_set_stream_status(stream, SST_PLATFORM_INIT);
281 stream->stream_info.period_elapsed = sst_period_elapsed;
282 stream->stream_info.arg = substream;
283 stream->stream_info.buffer_ptr = 0;
284 stream->stream_info.sfreq = substream->runtime->rate;
285 ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
286 if (ret_val)
287 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
288 return ret_val;
289
290 }
291
292 static int power_up_sst(struct sst_runtime_stream *stream)
293 {
294 return stream->ops->power(sst->dev, true);
295 }
296
297 static void power_down_sst(struct sst_runtime_stream *stream)
298 {
299 stream->ops->power(sst->dev, false);
300 }
301
302 static int sst_media_open(struct snd_pcm_substream *substream,
303 struct snd_soc_dai *dai)
304 {
305 int ret_val = 0;
306 struct snd_pcm_runtime *runtime = substream->runtime;
307 struct sst_runtime_stream *stream;
308
309 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
310 if (!stream)
311 return -ENOMEM;
312 spin_lock_init(&stream->status_lock);
313
314 /* get the sst ops */
315 mutex_lock(&sst_lock);
316 if (!sst ||
317 !try_module_get(sst->dev->driver->owner)) {
318 dev_err(dai->dev, "no device available to run\n");
319 ret_val = -ENODEV;
320 goto out_ops;
321 }
322 stream->ops = sst->ops;
323 mutex_unlock(&sst_lock);
324
325 stream->stream_info.str_id = 0;
326
327 stream->stream_info.arg = substream;
328 /* allocate memory for SST API set */
329 runtime->private_data = stream;
330
331 ret_val = power_up_sst(stream);
332 if (ret_val < 0)
333 goto out_power_up;
334
335 /*
336 * Make sure the period to be multiple of 1ms to align the
337 * design of firmware. Apply same rule to buffer size to make
338 * sure alsa could always find a value for period size
339 * regardless the buffer size given by user space.
340 */
341 snd_pcm_hw_constraint_step(substream->runtime, 0,
342 SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 48);
343 snd_pcm_hw_constraint_step(substream->runtime, 0,
344 SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 48);
345
346 /* Make sure, that the period size is always even */
347 snd_pcm_hw_constraint_step(substream->runtime, 0,
348 SNDRV_PCM_HW_PARAM_PERIODS, 2);
349
350 return snd_pcm_hw_constraint_integer(runtime,
351 SNDRV_PCM_HW_PARAM_PERIODS);
352 out_ops:
353 mutex_unlock(&sst_lock);
354 out_power_up:
355 kfree(stream);
356 return ret_val;
357 }
358
359 static void sst_media_close(struct snd_pcm_substream *substream,
360 struct snd_soc_dai *dai)
361 {
362 struct sst_runtime_stream *stream;
363 int str_id;
364
365 stream = substream->runtime->private_data;
366 power_down_sst(stream);
367
368 str_id = stream->stream_info.str_id;
369 if (str_id)
370 stream->ops->close(sst->dev, str_id);
371 module_put(sst->dev->driver->owner);
372 kfree(stream);
373 }
374
375 static int sst_media_prepare(struct snd_pcm_substream *substream,
376 struct snd_soc_dai *dai)
377 {
378 struct sst_runtime_stream *stream;
379 int ret_val, str_id;
380
381 stream = substream->runtime->private_data;
382 str_id = stream->stream_info.str_id;
383 if (stream->stream_info.str_id) {
384 ret_val = stream->ops->stream_drop(sst->dev, str_id);
385 return ret_val;
386 }
387
388 ret_val = sst_platform_alloc_stream(substream, dai);
389 if (ret_val <= 0)
390 return ret_val;
391 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
392 "%d", stream->stream_info.str_id);
393
394 ret_val = sst_platform_init_stream(substream);
395 if (ret_val)
396 return ret_val;
397 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
398 return 0;
399 }
400
401 static int sst_enable_ssp(struct snd_pcm_substream *substream,
402 struct snd_soc_dai *dai)
403 {
404 int ret = 0;
405
406 if (!snd_soc_dai_active(dai)) {
407 ret = sst_handle_vb_timer(dai, true);
408 sst_fill_ssp_defaults(dai);
409 }
410 return ret;
411 }
412
413 static int sst_be_hw_params(struct snd_pcm_substream *substream,
414 struct snd_pcm_hw_params *params,
415 struct snd_soc_dai *dai)
416 {
417 int ret = 0;
418
419 if (snd_soc_dai_active(dai) == 1)
420 ret = send_ssp_cmd(dai, dai->name, 1);
421 return ret;
422 }
423
424 static int sst_set_format(struct snd_soc_dai *dai, unsigned int fmt)
425 {
426 int ret = 0;
427
428 if (!snd_soc_dai_active(dai))
429 return 0;
430
431 ret = sst_fill_ssp_config(dai, fmt);
432 if (ret < 0)
433 dev_err(dai->dev, "sst_set_format failed..\n");
434
435 return ret;
436 }
437
438 static int sst_platform_set_ssp_slot(struct snd_soc_dai *dai,
439 unsigned int tx_mask, unsigned int rx_mask,
440 int slots, int slot_width) {
441 int ret = 0;
442
443 if (!snd_soc_dai_active(dai))
444 return ret;
445
446 ret = sst_fill_ssp_slot(dai, tx_mask, rx_mask, slots, slot_width);
447 if (ret < 0)
448 dev_err(dai->dev, "sst_fill_ssp_slot failed..%d\n", ret);
449
450 return ret;
451 }
452
453 static void sst_disable_ssp(struct snd_pcm_substream *substream,
454 struct snd_soc_dai *dai)
455 {
456 if (!snd_soc_dai_active(dai)) {
457 send_ssp_cmd(dai, dai->name, 0);
458 sst_handle_vb_timer(dai, false);
459 }
460 }
461
462 static const struct snd_soc_dai_ops sst_media_dai_ops = {
463 .startup = sst_media_open,
464 .shutdown = sst_media_close,
465 .prepare = sst_media_prepare,
466 .mute_stream = sst_media_digital_mute,
467 };
468
469 static const struct snd_soc_dai_ops sst_compr_dai_ops = {
470 .compress_new = snd_soc_new_compress,
471 .mute_stream = sst_media_digital_mute,
472 };
473
474 static const struct snd_soc_dai_ops sst_be_dai_ops = {
475 .startup = sst_enable_ssp,
476 .hw_params = sst_be_hw_params,
477 .set_fmt = sst_set_format,
478 .set_tdm_slot = sst_platform_set_ssp_slot,
479 .shutdown = sst_disable_ssp,
480 };
481
482 static struct snd_soc_dai_driver sst_platform_dai[] = {
483 {
484 .name = "media-cpu-dai",
485 .ops = &sst_media_dai_ops,
486 .playback = {
487 .stream_name = "Headset Playback",
488 .channels_min = SST_STEREO,
489 .channels_max = SST_STEREO,
490 .rates = SNDRV_PCM_RATE_48000,
491 .formats = SNDRV_PCM_FMTBIT_S16_LE,
492 },
493 .capture = {
494 .stream_name = "Headset Capture",
495 .channels_min = 1,
496 .channels_max = 2,
497 .rates = SNDRV_PCM_RATE_48000,
498 .formats = SNDRV_PCM_FMTBIT_S16_LE,
499 },
500 },
501 {
502 .name = "deepbuffer-cpu-dai",
503 .ops = &sst_media_dai_ops,
504 .playback = {
505 .stream_name = "Deepbuffer Playback",
506 .channels_min = SST_STEREO,
507 .channels_max = SST_STEREO,
508 .rates = SNDRV_PCM_RATE_48000,
509 .formats = SNDRV_PCM_FMTBIT_S16_LE,
510 },
511 },
512 {
513 .name = "compress-cpu-dai",
514 .ops = &sst_compr_dai_ops,
515 .playback = {
516 .stream_name = "Compress Playback",
517 .channels_min = 1,
518 },
519 },
520 /* BE CPU Dais */
521 {
522 .name = "ssp0-port",
523 .ops = &sst_be_dai_ops,
524 .playback = {
525 .stream_name = "ssp0 Tx",
526 .channels_min = SST_STEREO,
527 .channels_max = SST_STEREO,
528 .rates = SNDRV_PCM_RATE_48000,
529 .formats = SNDRV_PCM_FMTBIT_S16_LE,
530 },
531 .capture = {
532 .stream_name = "ssp0 Rx",
533 .channels_min = SST_STEREO,
534 .channels_max = SST_STEREO,
535 .rates = SNDRV_PCM_RATE_48000,
536 .formats = SNDRV_PCM_FMTBIT_S16_LE,
537 },
538 },
539 {
540 .name = "ssp1-port",
541 .ops = &sst_be_dai_ops,
542 .playback = {
543 .stream_name = "ssp1 Tx",
544 .channels_min = SST_STEREO,
545 .channels_max = SST_STEREO,
546 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
547 .formats = SNDRV_PCM_FMTBIT_S16_LE,
548 },
549 .capture = {
550 .stream_name = "ssp1 Rx",
551 .channels_min = SST_STEREO,
552 .channels_max = SST_STEREO,
553 .rates = SNDRV_PCM_RATE_8000|SNDRV_PCM_RATE_16000|SNDRV_PCM_RATE_48000,
554 .formats = SNDRV_PCM_FMTBIT_S16_LE,
555 },
556 },
557 {
558 .name = "ssp2-port",
559 .ops = &sst_be_dai_ops,
560 .playback = {
561 .stream_name = "ssp2 Tx",
562 .channels_min = SST_STEREO,
563 .channels_max = SST_STEREO,
564 .rates = SNDRV_PCM_RATE_48000,
565 .formats = SNDRV_PCM_FMTBIT_S16_LE,
566 },
567 .capture = {
568 .stream_name = "ssp2 Rx",
569 .channels_min = SST_STEREO,
570 .channels_max = SST_STEREO,
571 .rates = SNDRV_PCM_RATE_48000,
572 .formats = SNDRV_PCM_FMTBIT_S16_LE,
573 },
574 },
575 };
576
577 static int sst_soc_open(struct snd_soc_component *component,
578 struct snd_pcm_substream *substream)
579 {
580 struct snd_pcm_runtime *runtime;
581
582 if (substream->pcm->internal)
583 return 0;
584
585 runtime = substream->runtime;
586 runtime->hw = sst_platform_pcm_hw;
587 return 0;
588 }
589
590 static int sst_soc_trigger(struct snd_soc_component *component,
591 struct snd_pcm_substream *substream, int cmd)
592 {
593 int ret_val = 0, str_id;
594 struct sst_runtime_stream *stream;
595 int status;
596 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
597
598 dev_dbg(rtd->dev, "%s called\n", __func__);
599 if (substream->pcm->internal)
600 return 0;
601 stream = substream->runtime->private_data;
602 str_id = stream->stream_info.str_id;
603 switch (cmd) {
604 case SNDRV_PCM_TRIGGER_START:
605 dev_dbg(rtd->dev, "sst: Trigger Start\n");
606 status = SST_PLATFORM_RUNNING;
607 stream->stream_info.arg = substream;
608 ret_val = stream->ops->stream_start(sst->dev, str_id);
609 break;
610 case SNDRV_PCM_TRIGGER_STOP:
611 dev_dbg(rtd->dev, "sst: in stop\n");
612 status = SST_PLATFORM_DROPPED;
613 ret_val = stream->ops->stream_drop(sst->dev, str_id);
614 break;
615 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
616 case SNDRV_PCM_TRIGGER_SUSPEND:
617 dev_dbg(rtd->dev, "sst: in pause\n");
618 status = SST_PLATFORM_PAUSED;
619 ret_val = stream->ops->stream_pause(sst->dev, str_id);
620 break;
621 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
622 case SNDRV_PCM_TRIGGER_RESUME:
623 dev_dbg(rtd->dev, "sst: in pause release\n");
624 status = SST_PLATFORM_RUNNING;
625 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
626 break;
627 default:
628 return -EINVAL;
629 }
630
631 if (!ret_val)
632 sst_set_stream_status(stream, status);
633
634 return ret_val;
635 }
636
637
638 static snd_pcm_uframes_t sst_soc_pointer(struct snd_soc_component *component,
639 struct snd_pcm_substream *substream)
640 {
641 struct sst_runtime_stream *stream;
642 int ret_val, status;
643 struct pcm_stream_info *str_info;
644 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
645
646 stream = substream->runtime->private_data;
647 status = sst_get_stream_status(stream);
648 if (status == SST_PLATFORM_INIT)
649 return 0;
650 str_info = &stream->stream_info;
651 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
652 if (ret_val) {
653 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
654 return ret_val;
655 }
656 return str_info->buffer_ptr;
657 }
658
659 static snd_pcm_sframes_t sst_soc_delay(struct snd_soc_component *component,
660 struct snd_pcm_substream *substream)
661 {
662 struct sst_runtime_stream *stream = substream->runtime->private_data;
663 struct pcm_stream_info *str_info = &stream->stream_info;
664
665 if (sst_get_stream_status(stream) == SST_PLATFORM_INIT)
666 return 0;
667
668 return str_info->pcm_delay;
669 }
670
671 static int sst_soc_pcm_new(struct snd_soc_component *component,
672 struct snd_soc_pcm_runtime *rtd)
673 {
674 struct snd_soc_dai *dai = snd_soc_rtd_to_cpu(rtd, 0);
675 struct snd_pcm *pcm = rtd->pcm;
676
677 if (dai->driver->playback.channels_min ||
678 dai->driver->capture.channels_min) {
679 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,
680 pcm->card->dev,
681 SST_MIN_BUFFER, SST_MAX_BUFFER);
682 }
683 return 0;
684 }
685
686 static int sst_soc_probe(struct snd_soc_component *component)
687 {
688 struct sst_data *drv = dev_get_drvdata(component->dev);
689
690 drv->soc_card = component->card;
691 return sst_dsp_init_v2_dpcm(component);
692 }
693
694 static void sst_soc_remove(struct snd_soc_component *component)
695 {
696 struct sst_data *drv = dev_get_drvdata(component->dev);
697
698 drv->soc_card = NULL;
699 }
700
701 static const struct snd_soc_component_driver sst_soc_platform_drv = {
702 .name = DRV_NAME,
703 .probe = sst_soc_probe,
704 .remove = sst_soc_remove,
705 .open = sst_soc_open,
706 .trigger = sst_soc_trigger,
707 .pointer = sst_soc_pointer,
708 .delay = sst_soc_delay,
709 .compress_ops = &sst_platform_compress_ops,
710 .pcm_construct = sst_soc_pcm_new,
711 };
712
713 static int sst_platform_probe(struct platform_device *pdev)
714 {
715 struct sst_data *drv;
716 int ret;
717 struct sst_platform_data *pdata;
718
719 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
720 if (drv == NULL) {
721 return -ENOMEM;
722 }
723
724 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
725 if (pdata == NULL) {
726 return -ENOMEM;
727 }
728
729 pdata->pdev_strm_map = dpcm_strm_map;
730 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
731 drv->pdata = pdata;
732 drv->pdev = pdev;
733 mutex_init(&drv->lock);
734 dev_set_drvdata(&pdev->dev, drv);
735
736 ret = devm_snd_soc_register_component(&pdev->dev, &sst_soc_platform_drv,
737 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
738 if (ret)
739 dev_err(&pdev->dev, "registering cpu dais failed\n");
740
741 return ret;
742 }
743
744 static void sst_platform_remove(struct platform_device *pdev)
745 {
746 dev_dbg(&pdev->dev, "sst_platform_remove success\n");
747 }
748
749 #ifdef CONFIG_PM_SLEEP
750
751 static int sst_soc_prepare(struct device *dev)
752 {
753 struct sst_data *drv = dev_get_drvdata(dev);
754 struct snd_soc_pcm_runtime *rtd;
755
756 if (!drv->soc_card)
757 return 0;
758
759 /* suspend all pcms first */
760 snd_soc_suspend(drv->soc_card->dev);
761 snd_soc_poweroff(drv->soc_card->dev);
762
763 /* set the SSPs to idle */
764 for_each_card_rtds(drv->soc_card, rtd) {
765 struct snd_soc_dai *dai = snd_soc_rtd_to_cpu(rtd, 0);
766
767 if (snd_soc_dai_active(dai)) {
768 send_ssp_cmd(dai, dai->name, 0);
769 sst_handle_vb_timer(dai, false);
770 }
771 }
772
773 return 0;
774 }
775
776 static void sst_soc_complete(struct device *dev)
777 {
778 struct sst_data *drv = dev_get_drvdata(dev);
779 struct snd_soc_pcm_runtime *rtd;
780
781 if (!drv->soc_card)
782 return;
783
784 /* restart SSPs */
785 for_each_card_rtds(drv->soc_card, rtd) {
786 struct snd_soc_dai *dai = snd_soc_rtd_to_cpu(rtd, 0);
787
788 if (snd_soc_dai_active(dai)) {
789 sst_handle_vb_timer(dai, true);
790 send_ssp_cmd(dai, dai->name, 1);
791 }
792 }
793 snd_soc_resume(drv->soc_card->dev);
794 }
795
796 #else
797
798 #define sst_soc_prepare NULL
799 #define sst_soc_complete NULL
800
801 #endif
802
803
804 static const struct dev_pm_ops sst_platform_pm = {
805 .prepare = sst_soc_prepare,
806 .complete = sst_soc_complete,
807 };
808
809 static struct platform_driver sst_platform_driver = {
810 .driver = {
811 .name = "sst-mfld-platform",
812 .pm = &sst_platform_pm,
813 },
814 .probe = sst_platform_probe,
815 .remove_new = sst_platform_remove,
816 };
817
818 module_platform_driver(sst_platform_driver);
819
820 MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
821 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
822 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
823 MODULE_LICENSE("GPL v2");
824 MODULE_ALIAS("platform:sst-atom-hifi2-platform");
825 MODULE_ALIAS("platform:sst-mfld-platform");
826
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