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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
34struct sst_device *sst;
35static DEFINE_MUTEX(sst_lock);
36extern struct snd_compr_ops sst_platform_compr_ops;
37
38int sst_register_dsp(struct sst_device *dev)
39{
40 if (WARN_ON(!dev))
41 return -EINVAL;
42 if (!try_module_get(dev->dev->driver->owner))
43 return -ENODEV;
44 mutex_lock(&sst_lock);
45 if (sst) {
46 dev_err(dev->dev, "we already have a device %s\n", sst->name);
47 module_put(dev->dev->driver->owner);
48 mutex_unlock(&sst_lock);
49 return -EEXIST;
50 }
51 dev_dbg(dev->dev, "registering device %s\n", dev->name);
52 sst = dev;
53 mutex_unlock(&sst_lock);
54 return 0;
55}
56EXPORT_SYMBOL_GPL(sst_register_dsp);
57
58int sst_unregister_dsp(struct sst_device *dev)
59{
60 if (WARN_ON(!dev))
61 return -EINVAL;
62 if (dev != sst)
63 return -EINVAL;
64
65 mutex_lock(&sst_lock);
66
67 if (!sst) {
68 mutex_unlock(&sst_lock);
69 return -EIO;
70 }
71
72 module_put(sst->dev->driver->owner);
73 dev_dbg(dev->dev, "unreg %s\n", sst->name);
74 sst = NULL;
75 mutex_unlock(&sst_lock);
76 return 0;
77}
78EXPORT_SYMBOL_GPL(sst_unregister_dsp);
79
80static struct snd_pcm_hardware sst_platform_pcm_hw = {
81 .info = (SNDRV_PCM_INFO_INTERLEAVED |
82 SNDRV_PCM_INFO_DOUBLE |
83 SNDRV_PCM_INFO_PAUSE |
84 SNDRV_PCM_INFO_RESUME |
85 SNDRV_PCM_INFO_MMAP|
86 SNDRV_PCM_INFO_MMAP_VALID |
87 SNDRV_PCM_INFO_BLOCK_TRANSFER |
88 SNDRV_PCM_INFO_SYNC_START),
89 .buffer_bytes_max = SST_MAX_BUFFER,
90 .period_bytes_min = SST_MIN_PERIOD_BYTES,
91 .period_bytes_max = SST_MAX_PERIOD_BYTES,
92 .periods_min = SST_MIN_PERIODS,
93 .periods_max = SST_MAX_PERIODS,
94 .fifo_size = SST_FIFO_SIZE,
95};
96
97static struct sst_dev_stream_map dpcm_strm_map[] = {
98 {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF},
99 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
100 {MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
101 {MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
102};
103
104
105static struct snd_soc_dai_driver sst_platform_dai[] = {
106{
107 .name = "Headset-cpu-dai",
108 .id = 0,
109 .playback = {
110 .channels_min = SST_STEREO,
111 .channels_max = SST_STEREO,
112 .rates = SNDRV_PCM_RATE_48000,
113 .formats = SNDRV_PCM_FMTBIT_S24_LE,
114 },
115 .capture = {
116 .channels_min = 1,
117 .channels_max = 5,
118 .rates = SNDRV_PCM_RATE_48000,
119 .formats = SNDRV_PCM_FMTBIT_S24_LE,
120 },
121},
122{
123 .name = "Compress-cpu-dai",
124 .compress_dai = 1,
125 .playback = {
126 .channels_min = SST_STEREO,
127 .channels_max = SST_STEREO,
128 .rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
129 .formats = SNDRV_PCM_FMTBIT_S16_LE,
130 },
131},
132};
133
134
135void sst_set_stream_status(struct sst_runtime_stream *stream,
136 int state)
137{
138 unsigned long flags;
139 spin_lock_irqsave(&stream->status_lock, flags);
140 stream->stream_status = state;
141 spin_unlock_irqrestore(&stream->status_lock, flags);
142}
143
144static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
145{
146 int state;
147 unsigned long flags;
148
149 spin_lock_irqsave(&stream->status_lock, flags);
150 state = stream->stream_status;
151 spin_unlock_irqrestore(&stream->status_lock, flags);
152 return state;
153}
154
155static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
156 struct snd_sst_alloc_params_ext *alloc_param)
157{
158 unsigned int channels;
159 snd_pcm_uframes_t period_size;
160 ssize_t periodbytes;
161 ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
162 u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
163
164 channels = substream->runtime->channels;
165 period_size = substream->runtime->period_size;
166 periodbytes = samples_to_bytes(substream->runtime, period_size);
167 alloc_param->ring_buf_info[0].addr = buffer_addr;
168 alloc_param->ring_buf_info[0].size = buffer_bytes;
169 alloc_param->sg_count = 1;
170 alloc_param->reserved = 0;
171 alloc_param->frag_size = periodbytes * channels;
172
173}
174static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
175 struct snd_sst_stream_params *param)
176{
177 param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
178 param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
179 param->uc.pcm_params.sfreq = substream->runtime->rate;
180
181
182 param->uc.pcm_params.use_offload_path = 0;
183 param->uc.pcm_params.reserved2 = 0;
184 memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
185
186}
187
188static int sst_get_stream_mapping(int dev, int sdev, int dir,
189 struct sst_dev_stream_map *map, int size)
190{
191 int i;
192
193 if (map == NULL)
194 return -EINVAL;
195
196
197
198 for (i = 1; i < size; i++) {
199 if ((map[i].dev_num == dev) && (map[i].direction == dir))
200 return i;
201 }
202 return 0;
203}
204
205int sst_fill_stream_params(void *substream,
206 const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
207{
208 int map_size;
209 int index;
210 struct sst_dev_stream_map *map;
211 struct snd_pcm_substream *pstream = NULL;
212 struct snd_compr_stream *cstream = NULL;
213
214 map = ctx->pdata->pdev_strm_map;
215 map_size = ctx->pdata->strm_map_size;
216
217 if (is_compress == true)
218 cstream = (struct snd_compr_stream *)substream;
219 else
220 pstream = (struct snd_pcm_substream *)substream;
221
222 str_params->stream_type = SST_STREAM_TYPE_MUSIC;
223
224
225 if (pstream) {
226 index = sst_get_stream_mapping(pstream->pcm->device,
227 pstream->number, pstream->stream,
228 map, map_size);
229 if (index <= 0)
230 return -EINVAL;
231
232 str_params->stream_id = index;
233 str_params->device_type = map[index].device_id;
234 str_params->task = map[index].task_id;
235
236 str_params->ops = (u8)pstream->stream;
237 }
238
239 if (cstream) {
240 index = sst_get_stream_mapping(cstream->device->device,
241 0, cstream->direction,
242 map, map_size);
243 if (index <= 0)
244 return -EINVAL;
245 str_params->stream_id = index;
246 str_params->device_type = map[index].device_id;
247 str_params->task = map[index].task_id;
248
249 str_params->ops = (u8)cstream->direction;
250 }
251 return 0;
252}
253
254static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
255 struct snd_soc_dai *dai)
256{
257 struct sst_runtime_stream *stream =
258 substream->runtime->private_data;
259 struct snd_sst_stream_params param = {{{0,},},};
260 struct snd_sst_params str_params = {0};
261 struct snd_sst_alloc_params_ext alloc_params = {0};
262 int ret_val = 0;
263 struct sst_data *ctx = snd_soc_dai_get_drvdata(dai);
264
265
266 sst_fill_pcm_params(substream, ¶m);
267 sst_fill_alloc_params(substream, &alloc_params);
268 substream->runtime->dma_area = substream->dma_buffer.area;
269 str_params.sparams = param;
270 str_params.aparams = alloc_params;
271 str_params.codec = SST_CODEC_TYPE_PCM;
272
273
274 ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
275 if (ret_val < 0)
276 return ret_val;
277
278 stream->stream_info.str_id = str_params.stream_id;
279
280 ret_val = stream->ops->open(sst->dev, &str_params);
281 if (ret_val <= 0)
282 return ret_val;
283
284
285 return ret_val;
286}
287
288static void sst_period_elapsed(void *arg)
289{
290 struct snd_pcm_substream *substream = arg;
291 struct sst_runtime_stream *stream;
292 int status;
293
294 if (!substream || !substream->runtime)
295 return;
296 stream = substream->runtime->private_data;
297 if (!stream)
298 return;
299 status = sst_get_stream_status(stream);
300 if (status != SST_PLATFORM_RUNNING)
301 return;
302 snd_pcm_period_elapsed(substream);
303}
304
305static int sst_platform_init_stream(struct snd_pcm_substream *substream)
306{
307 struct sst_runtime_stream *stream =
308 substream->runtime->private_data;
309 struct snd_soc_pcm_runtime *rtd = substream->private_data;
310 int ret_val;
311
312 dev_dbg(rtd->dev, "setting buffer ptr param\n");
313 sst_set_stream_status(stream, SST_PLATFORM_INIT);
314 stream->stream_info.period_elapsed = sst_period_elapsed;
315 stream->stream_info.arg = substream;
316 stream->stream_info.buffer_ptr = 0;
317 stream->stream_info.sfreq = substream->runtime->rate;
318 ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
319 if (ret_val)
320 dev_err(rtd->dev, "control_set ret error %d\n", ret_val);
321 return ret_val;
322
323}
324
325static int power_up_sst(struct sst_runtime_stream *stream)
326{
327 return stream->ops->power(sst->dev, true);
328}
329
330static void power_down_sst(struct sst_runtime_stream *stream)
331{
332 stream->ops->power(sst->dev, false);
333}
334
335static int sst_media_open(struct snd_pcm_substream *substream,
336 struct snd_soc_dai *dai)
337{
338 int ret_val = 0;
339 struct snd_pcm_runtime *runtime = substream->runtime;
340 struct sst_runtime_stream *stream;
341
342 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
343 if (!stream)
344 return -ENOMEM;
345 spin_lock_init(&stream->status_lock);
346
347
348 mutex_lock(&sst_lock);
349 if (!sst ||
350 !try_module_get(sst->dev->driver->owner)) {
351 dev_err(dai->dev, "no device available to run\n");
352 ret_val = -ENODEV;
353 goto out_ops;
354 }
355 stream->ops = sst->ops;
356 mutex_unlock(&sst_lock);
357
358 stream->stream_info.str_id = 0;
359
360 stream->stream_info.arg = substream;
361
362 runtime->private_data = stream;
363
364 ret_val = power_up_sst(stream);
365 if (ret_val < 0)
366 return ret_val;
367
368
369 snd_pcm_hw_constraint_step(substream->runtime, 0,
370 SNDRV_PCM_HW_PARAM_PERIODS, 2);
371
372 return snd_pcm_hw_constraint_integer(runtime,
373 SNDRV_PCM_HW_PARAM_PERIODS);
374out_ops:
375 kfree(stream);
376 mutex_unlock(&sst_lock);
377 return ret_val;
378}
379
380static void sst_media_close(struct snd_pcm_substream *substream,
381 struct snd_soc_dai *dai)
382{
383 struct sst_runtime_stream *stream;
384 int ret_val = 0, str_id;
385
386 stream = substream->runtime->private_data;
387 power_down_sst(stream);
388
389 str_id = stream->stream_info.str_id;
390 if (str_id)
391 ret_val = stream->ops->close(sst->dev, str_id);
392 module_put(sst->dev->driver->owner);
393 kfree(stream);
394}
395
396static inline unsigned int get_current_pipe_id(struct snd_soc_dai *dai,
397 struct snd_pcm_substream *substream)
398{
399 struct sst_data *sst = snd_soc_dai_get_drvdata(dai);
400 struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
401 struct sst_runtime_stream *stream =
402 substream->runtime->private_data;
403 u32 str_id = stream->stream_info.str_id;
404 unsigned int pipe_id;
405
406 pipe_id = map[str_id].device_id;
407
408 dev_dbg(dai->dev, "got pipe_id = %#x for str_id = %d\n",
409 pipe_id, str_id);
410 return pipe_id;
411}
412
413static int sst_media_prepare(struct snd_pcm_substream *substream,
414 struct snd_soc_dai *dai)
415{
416 struct sst_runtime_stream *stream;
417 int ret_val = 0, str_id;
418
419 stream = substream->runtime->private_data;
420 str_id = stream->stream_info.str_id;
421 if (stream->stream_info.str_id) {
422 ret_val = stream->ops->stream_drop(sst->dev, str_id);
423 return ret_val;
424 }
425
426 ret_val = sst_platform_alloc_stream(substream, dai);
427 if (ret_val <= 0)
428 return ret_val;
429 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
430 "%d", stream->stream_info.str_id);
431
432 ret_val = sst_platform_init_stream(substream);
433 if (ret_val)
434 return ret_val;
435 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
436 return ret_val;
437}
438
439static int sst_media_hw_params(struct snd_pcm_substream *substream,
440 struct snd_pcm_hw_params *params,
441 struct snd_soc_dai *dai)
442{
443 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
444 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
445 return 0;
446}
447
448static int sst_media_hw_free(struct snd_pcm_substream *substream,
449 struct snd_soc_dai *dai)
450{
451 return snd_pcm_lib_free_pages(substream);
452}
453
454static struct snd_soc_dai_ops sst_media_dai_ops = {
455 .startup = sst_media_open,
456 .shutdown = sst_media_close,
457 .prepare = sst_media_prepare,
458 .hw_params = sst_media_hw_params,
459 .hw_free = sst_media_hw_free,
460};
461
462static int sst_platform_open(struct snd_pcm_substream *substream)
463{
464 struct snd_pcm_runtime *runtime;
465
466 if (substream->pcm->internal)
467 return 0;
468
469 runtime = substream->runtime;
470 runtime->hw = sst_platform_pcm_hw;
471 return 0;
472}
473
474static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
475 int cmd)
476{
477 int ret_val = 0, str_id;
478 struct sst_runtime_stream *stream;
479 int status;
480 struct snd_soc_pcm_runtime *rtd = substream->private_data;
481
482 dev_dbg(rtd->dev, "sst_platform_pcm_trigger called\n");
483 if (substream->pcm->internal)
484 return 0;
485 stream = substream->runtime->private_data;
486 str_id = stream->stream_info.str_id;
487 switch (cmd) {
488 case SNDRV_PCM_TRIGGER_START:
489 dev_dbg(rtd->dev, "sst: Trigger Start\n");
490 status = SST_PLATFORM_RUNNING;
491 stream->stream_info.arg = substream;
492 ret_val = stream->ops->stream_start(sst->dev, str_id);
493 break;
494 case SNDRV_PCM_TRIGGER_STOP:
495 dev_dbg(rtd->dev, "sst: in stop\n");
496 status = SST_PLATFORM_DROPPED;
497 ret_val = stream->ops->stream_drop(sst->dev, str_id);
498 break;
499 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
500 dev_dbg(rtd->dev, "sst: in pause\n");
501 status = SST_PLATFORM_PAUSED;
502 ret_val = stream->ops->stream_pause(sst->dev, str_id);
503 break;
504 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
505 dev_dbg(rtd->dev, "sst: in pause release\n");
506 status = SST_PLATFORM_RUNNING;
507 ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
508 break;
509 default:
510 return -EINVAL;
511 }
512
513 if (!ret_val)
514 sst_set_stream_status(stream, status);
515
516 return ret_val;
517}
518
519
520static snd_pcm_uframes_t sst_platform_pcm_pointer
521 (struct snd_pcm_substream *substream)
522{
523 struct sst_runtime_stream *stream;
524 int ret_val, status;
525 struct pcm_stream_info *str_info;
526 struct snd_soc_pcm_runtime *rtd = substream->private_data;
527
528 stream = substream->runtime->private_data;
529 status = sst_get_stream_status(stream);
530 if (status == SST_PLATFORM_INIT)
531 return 0;
532 str_info = &stream->stream_info;
533 ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
534 if (ret_val) {
535 dev_err(rtd->dev, "sst: error code = %d\n", ret_val);
536 return ret_val;
537 }
538 substream->runtime->delay = str_info->pcm_delay;
539 return str_info->buffer_ptr;
540}
541
542static struct snd_pcm_ops sst_platform_ops = {
543 .open = sst_platform_open,
544 .ioctl = snd_pcm_lib_ioctl,
545 .trigger = sst_platform_pcm_trigger,
546 .pointer = sst_platform_pcm_pointer,
547};
548
549static void sst_pcm_free(struct snd_pcm *pcm)
550{
551 dev_dbg(pcm->dev, "sst_pcm_free called\n");
552 snd_pcm_lib_preallocate_free_for_all(pcm);
553}
554
555static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
556{
557 struct snd_soc_dai *dai = rtd->cpu_dai;
558 struct snd_pcm *pcm = rtd->pcm;
559 int retval = 0;
560
561 if (dai->driver->playback.channels_min ||
562 dai->driver->capture.channels_min) {
563 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
564 SNDRV_DMA_TYPE_CONTINUOUS,
565 snd_dma_continuous_data(GFP_DMA),
566 SST_MIN_BUFFER, SST_MAX_BUFFER);
567 if (retval) {
568 dev_err(rtd->dev, "dma buffer allocationf fail\n");
569 return retval;
570 }
571 }
572 return retval;
573}
574
575static int sst_soc_probe(struct snd_soc_platform *platform)
576{
577 return sst_dsp_init_v2_dpcm(platform);
578}
579
580static struct snd_soc_platform_driver sst_soc_platform_drv = {
581 .probe = sst_soc_probe,
582 .ops = &sst_platform_ops,
583 .compr_ops = &sst_platform_compr_ops,
584 .pcm_new = sst_pcm_new,
585 .pcm_free = sst_pcm_free,
586};
587
588static const struct snd_soc_component_driver sst_component = {
589 .name = "sst",
590};
591
592
593static int sst_platform_probe(struct platform_device *pdev)
594{
595 struct sst_data *drv;
596 int ret;
597 struct sst_platform_data *pdata;
598
599 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
600 if (drv == NULL) {
601 return -ENOMEM;
602 }
603
604 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
605 if (pdata == NULL) {
606 return -ENOMEM;
607 }
608
609 pdata->pdev_strm_map = dpcm_strm_map;
610 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
611 drv->pdata = pdata;
612 mutex_init(&drv->lock);
613 dev_set_drvdata(&pdev->dev, drv);
614
615 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
616 if (ret) {
617 dev_err(&pdev->dev, "registering soc platform failed\n");
618 return ret;
619 }
620
621 ret = snd_soc_register_component(&pdev->dev, &sst_component,
622 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
623 if (ret) {
624 dev_err(&pdev->dev, "registering cpu dais failed\n");
625 snd_soc_unregister_platform(&pdev->dev);
626 }
627 return ret;
628}
629
630static int sst_platform_remove(struct platform_device *pdev)
631{
632
633 snd_soc_unregister_component(&pdev->dev);
634 snd_soc_unregister_platform(&pdev->dev);
635 dev_dbg(&pdev->dev, "sst_platform_remove success\n");
636 return 0;
637}
638
639static struct platform_driver sst_platform_driver = {
640 .driver = {
641 .name = "sst-mfld-platform",
642 .owner = THIS_MODULE,
643 },
644 .probe = sst_platform_probe,
645 .remove = sst_platform_remove,
646};
647
648module_platform_driver(sst_platform_driver);
649
650MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
651MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
652MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
653MODULE_LICENSE("GPL v2");
654MODULE_ALIAS("platform:sst-mfld-platform");
655
