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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 pr_err("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 pr_debug("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 pr_debug("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_platform *platform)
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_platform_get_drvdata(platform);
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(&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 int ret_val;
310
311 pr_debug("setting buffer ptr param\n");
312 sst_set_stream_status(stream, SST_PLATFORM_INIT);
313 stream->stream_info.period_elapsed = sst_period_elapsed;
314 stream->stream_info.arg = substream;
315 stream->stream_info.buffer_ptr = 0;
316 stream->stream_info.sfreq = substream->runtime->rate;
317 ret_val = stream->ops->device_control(
318 SST_SND_STREAM_INIT, &stream->stream_info);
319 if (ret_val)
320 pr_err("control_set ret error %d\n", ret_val);
321 return ret_val;
322
323}
324
325
326static int sst_media_open(struct snd_pcm_substream *substream,
327 struct snd_soc_dai *dai)
328{
329 int ret_val = 0;
330 struct snd_pcm_runtime *runtime = substream->runtime;
331 struct sst_runtime_stream *stream;
332
333 stream = kzalloc(sizeof(*stream), GFP_KERNEL);
334 if (!stream)
335 return -ENOMEM;
336 spin_lock_init(&stream->status_lock);
337
338
339 mutex_lock(&sst_lock);
340 if (!sst ||
341 !try_module_get(sst->dev->driver->owner)) {
342 pr_err("no device available to run\n");
343 ret_val = -ENODEV;
344 goto out_ops;
345 }
346 stream->ops = sst->ops;
347 mutex_unlock(&sst_lock);
348
349 stream->stream_info.str_id = 0;
350
351 stream->stream_info.arg = substream;
352
353 runtime->private_data = stream;
354
355
356 snd_pcm_hw_constraint_step(substream->runtime, 0,
357 SNDRV_PCM_HW_PARAM_PERIODS, 2);
358
359 return snd_pcm_hw_constraint_integer(runtime,
360 SNDRV_PCM_HW_PARAM_PERIODS);
361out_ops:
362 kfree(stream);
363 mutex_unlock(&sst_lock);
364 return ret_val;
365}
366
367static void sst_media_close(struct snd_pcm_substream *substream,
368 struct snd_soc_dai *dai)
369{
370 struct sst_runtime_stream *stream;
371 int ret_val = 0, str_id;
372
373 stream = substream->runtime->private_data;
374 str_id = stream->stream_info.str_id;
375 if (str_id)
376 ret_val = stream->ops->close(str_id);
377 module_put(sst->dev->driver->owner);
378 kfree(stream);
379}
380
381static inline unsigned int get_current_pipe_id(struct snd_soc_platform *platform,
382 struct snd_pcm_substream *substream)
383{
384 struct sst_data *sst = snd_soc_platform_get_drvdata(platform);
385 struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
386 struct sst_runtime_stream *stream =
387 substream->runtime->private_data;
388 u32 str_id = stream->stream_info.str_id;
389 unsigned int pipe_id;
390 pipe_id = map[str_id].device_id;
391
392 pr_debug("%s: got pipe_id = %#x for str_id = %d\n",
393 __func__, pipe_id, str_id);
394 return pipe_id;
395}
396
397static int sst_media_prepare(struct snd_pcm_substream *substream,
398 struct snd_soc_dai *dai)
399{
400 struct sst_runtime_stream *stream;
401 int ret_val = 0, str_id;
402
403 stream = substream->runtime->private_data;
404 str_id = stream->stream_info.str_id;
405 if (stream->stream_info.str_id) {
406 ret_val = stream->ops->device_control(
407 SST_SND_DROP, &str_id);
408 return ret_val;
409 }
410
411 ret_val = sst_platform_alloc_stream(substream, dai->platform);
412 if (ret_val <= 0)
413 return ret_val;
414 snprintf(substream->pcm->id, sizeof(substream->pcm->id),
415 "%d", stream->stream_info.str_id);
416
417 ret_val = sst_platform_init_stream(substream);
418 if (ret_val)
419 return ret_val;
420 substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
421 return ret_val;
422}
423
424static int sst_media_hw_params(struct snd_pcm_substream *substream,
425 struct snd_pcm_hw_params *params,
426 struct snd_soc_dai *dai)
427{
428 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
429 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
430 return 0;
431}
432
433static int sst_media_hw_free(struct snd_pcm_substream *substream,
434 struct snd_soc_dai *dai)
435{
436 return snd_pcm_lib_free_pages(substream);
437}
438
439static struct snd_soc_dai_ops sst_media_dai_ops = {
440 .startup = sst_media_open,
441 .shutdown = sst_media_close,
442 .prepare = sst_media_prepare,
443 .hw_params = sst_media_hw_params,
444 .hw_free = sst_media_hw_free,
445};
446
447static int sst_platform_open(struct snd_pcm_substream *substream)
448{
449 struct snd_pcm_runtime *runtime;
450
451 if (substream->pcm->internal)
452 return 0;
453
454 runtime = substream->runtime;
455 runtime->hw = sst_platform_pcm_hw;
456 return 0;
457}
458
459static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
460 int cmd)
461{
462 int ret_val = 0, str_id;
463 struct sst_runtime_stream *stream;
464 int str_cmd, status;
465
466 pr_debug("sst_platform_pcm_trigger called\n");
467 stream = substream->runtime->private_data;
468 str_id = stream->stream_info.str_id;
469 switch (cmd) {
470 case SNDRV_PCM_TRIGGER_START:
471 pr_debug("sst: Trigger Start\n");
472 str_cmd = SST_SND_START;
473 status = SST_PLATFORM_RUNNING;
474 stream->stream_info.arg = substream;
475 break;
476 case SNDRV_PCM_TRIGGER_STOP:
477 pr_debug("sst: in stop\n");
478 str_cmd = SST_SND_DROP;
479 status = SST_PLATFORM_DROPPED;
480 break;
481 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
482 pr_debug("sst: in pause\n");
483 str_cmd = SST_SND_PAUSE;
484 status = SST_PLATFORM_PAUSED;
485 break;
486 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
487 pr_debug("sst: in pause release\n");
488 str_cmd = SST_SND_RESUME;
489 status = SST_PLATFORM_RUNNING;
490 break;
491 default:
492 return -EINVAL;
493 }
494 ret_val = stream->ops->device_control(str_cmd, &str_id);
495 if (!ret_val)
496 sst_set_stream_status(stream, status);
497
498 return ret_val;
499}
500
501
502static snd_pcm_uframes_t sst_platform_pcm_pointer
503 (struct snd_pcm_substream *substream)
504{
505 struct sst_runtime_stream *stream;
506 int ret_val, status;
507 struct pcm_stream_info *str_info;
508
509 stream = substream->runtime->private_data;
510 status = sst_get_stream_status(stream);
511 if (status == SST_PLATFORM_INIT)
512 return 0;
513 str_info = &stream->stream_info;
514 ret_val = stream->ops->device_control(
515 SST_SND_BUFFER_POINTER, str_info);
516 if (ret_val) {
517 pr_err("sst: error code = %d\n", ret_val);
518 return ret_val;
519 }
520 substream->runtime->delay = str_info->pcm_delay;
521 return str_info->buffer_ptr;
522}
523
524static struct snd_pcm_ops sst_platform_ops = {
525 .open = sst_platform_open,
526 .ioctl = snd_pcm_lib_ioctl,
527 .trigger = sst_platform_pcm_trigger,
528 .pointer = sst_platform_pcm_pointer,
529};
530
531static void sst_pcm_free(struct snd_pcm *pcm)
532{
533 pr_debug("sst_pcm_free called\n");
534 snd_pcm_lib_preallocate_free_for_all(pcm);
535}
536
537static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
538{
539 struct snd_soc_dai *dai = rtd->cpu_dai;
540 struct snd_pcm *pcm = rtd->pcm;
541 int retval = 0;
542
543 if (dai->driver->playback.channels_min ||
544 dai->driver->capture.channels_min) {
545 retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
546 SNDRV_DMA_TYPE_CONTINUOUS,
547 snd_dma_continuous_data(GFP_DMA),
548 SST_MIN_BUFFER, SST_MAX_BUFFER);
549 if (retval) {
550 pr_err("dma buffer allocationf fail\n");
551 return retval;
552 }
553 }
554 return retval;
555}
556
557static struct snd_soc_platform_driver sst_soc_platform_drv = {
558 .ops = &sst_platform_ops,
559 .compr_ops = &sst_platform_compr_ops,
560 .pcm_new = sst_pcm_new,
561 .pcm_free = sst_pcm_free,
562};
563
564static const struct snd_soc_component_driver sst_component = {
565 .name = "sst",
566};
567
568
569static int sst_platform_probe(struct platform_device *pdev)
570{
571 struct sst_data *drv;
572 int ret;
573 struct sst_platform_data *pdata;
574
575 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
576 if (drv == NULL) {
577 pr_err("kzalloc failed\n");
578 return -ENOMEM;
579 }
580
581 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
582 if (pdata == NULL) {
583 pr_err("kzalloc failed for pdata\n");
584 return -ENOMEM;
585 }
586
587 pdata->pdev_strm_map = dpcm_strm_map;
588 pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
589 drv->pdata = pdata;
590 mutex_init(&drv->lock);
591 dev_set_drvdata(&pdev->dev, drv);
592
593 ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
594 if (ret) {
595 pr_err("registering soc platform failed\n");
596 return ret;
597 }
598
599 ret = snd_soc_register_component(&pdev->dev, &sst_component,
600 sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
601 if (ret) {
602 pr_err("registering cpu dais failed\n");
603 snd_soc_unregister_platform(&pdev->dev);
604 }
605 return ret;
606}
607
608static int sst_platform_remove(struct platform_device *pdev)
609{
610
611 snd_soc_unregister_component(&pdev->dev);
612 snd_soc_unregister_platform(&pdev->dev);
613 pr_debug("sst_platform_remove success\n");
614 return 0;
615}
616
617static struct platform_driver sst_platform_driver = {
618 .driver = {
619 .name = "sst-mfld-platform",
620 .owner = THIS_MODULE,
621 },
622 .probe = sst_platform_probe,
623 .remove = sst_platform_remove,
624};
625
626module_platform_driver(sst_platform_driver);
627
628MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
629MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
630MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
631MODULE_LICENSE("GPL v2");
632MODULE_ALIAS("platform:sst-mfld-platform");
633
