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15#include <linux/module.h>
16#include <linux/dma-mapping.h>
17#include <linux/slab.h>
18#include <sound/core.h>
19#include <sound/pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/soc.h>
22#include "sst-baytrail-ipc.h"
23#include "../common/sst-dsp-priv.h"
24#include "../common/sst-dsp.h"
25
26#define DRV_NAME "byt-dai"
27#define BYT_PCM_COUNT 2
28
29static const struct snd_pcm_hardware sst_byt_pcm_hardware = {
30 .info = SNDRV_PCM_INFO_MMAP |
31 SNDRV_PCM_INFO_MMAP_VALID |
32 SNDRV_PCM_INFO_INTERLEAVED |
33 SNDRV_PCM_INFO_PAUSE |
34 SNDRV_PCM_INFO_RESUME,
35 .formats = SNDRV_PCM_FMTBIT_S16_LE |
36 SNDRV_PCM_FMTBIT_S24_LE,
37 .period_bytes_min = 384,
38 .period_bytes_max = 48000,
39 .periods_min = 2,
40 .periods_max = 250,
41 .buffer_bytes_max = 96000,
42};
43
44
45struct sst_byt_pcm_data {
46 struct sst_byt_stream *stream;
47 struct snd_pcm_substream *substream;
48 struct mutex mutex;
49
50
51 u32 hw_ptr;
52
53 struct work_struct work;
54};
55
56
57struct sst_byt_priv_data {
58
59 struct sst_byt *byt;
60
61
62 struct sst_byt_pcm_data pcm[BYT_PCM_COUNT];
63
64
65 bool restore_stream;
66};
67
68
69static int sst_byt_pcm_hw_params(struct snd_pcm_substream *substream,
70 struct snd_pcm_hw_params *params)
71{
72 struct snd_soc_pcm_runtime *rtd = substream->private_data;
73 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
74 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
75 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
76 struct sst_byt *byt = pdata->byt;
77 u32 rate, bits;
78 u8 channels;
79 int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
80
81 dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data);
82
83 ret = sst_byt_stream_type(byt, pcm_data->stream,
84 1, 1, !playback);
85 if (ret < 0) {
86 dev_err(rtd->dev, "failed to set stream format %d\n", ret);
87 return ret;
88 }
89
90 rate = params_rate(params);
91 ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate);
92 if (ret < 0) {
93 dev_err(rtd->dev, "could not set rate %d\n", rate);
94 return ret;
95 }
96
97 bits = snd_pcm_format_width(params_format(params));
98 ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits);
99 if (ret < 0) {
100 dev_err(rtd->dev, "could not set formats %d\n",
101 params_rate(params));
102 return ret;
103 }
104
105 channels = (u8)(params_channels(params) & 0xF);
106 ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels);
107 if (ret < 0) {
108 dev_err(rtd->dev, "could not set channels %d\n",
109 params_rate(params));
110 return ret;
111 }
112
113 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
114
115 ret = sst_byt_stream_buffer(byt, pcm_data->stream,
116 substream->dma_buffer.addr,
117 params_buffer_bytes(params));
118 if (ret < 0) {
119 dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret);
120 return ret;
121 }
122
123 ret = sst_byt_stream_commit(byt, pcm_data->stream);
124 if (ret < 0) {
125 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
126 return ret;
127 }
128
129 return 0;
130}
131
132static int sst_byt_pcm_hw_free(struct snd_pcm_substream *substream)
133{
134 struct snd_soc_pcm_runtime *rtd = substream->private_data;
135
136 dev_dbg(rtd->dev, "PCM: hw_free\n");
137 snd_pcm_lib_free_pages(substream);
138
139 return 0;
140}
141
142static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream)
143{
144 struct snd_soc_pcm_runtime *rtd = substream->private_data;
145 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
146 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
147 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
148 struct sst_byt *byt = pdata->byt;
149 int ret;
150
151
152 ret = sst_byt_stream_commit(byt, pcm_data->stream);
153 if (ret < 0) {
154 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
155 return ret;
156 }
157
158 sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr);
159
160 dev_dbg(rtd->dev, "stream context restored at offset %d\n",
161 pcm_data->hw_ptr);
162
163 return 0;
164}
165
166static void sst_byt_pcm_work(struct work_struct *work)
167{
168 struct sst_byt_pcm_data *pcm_data =
169 container_of(work, struct sst_byt_pcm_data, work);
170
171 if (snd_pcm_running(pcm_data->substream))
172 sst_byt_pcm_restore_stream_context(pcm_data->substream);
173}
174
175static int sst_byt_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
176{
177 struct snd_soc_pcm_runtime *rtd = substream->private_data;
178 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
179 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
180 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
181 struct sst_byt *byt = pdata->byt;
182
183 dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd);
184
185 switch (cmd) {
186 case SNDRV_PCM_TRIGGER_START:
187 pcm_data->hw_ptr = 0;
188 sst_byt_stream_start(byt, pcm_data->stream, 0);
189 break;
190 case SNDRV_PCM_TRIGGER_RESUME:
191 if (pdata->restore_stream == true)
192 schedule_work(&pcm_data->work);
193 else
194 sst_byt_stream_resume(byt, pcm_data->stream);
195 break;
196 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
197 sst_byt_stream_resume(byt, pcm_data->stream);
198 break;
199 case SNDRV_PCM_TRIGGER_STOP:
200 sst_byt_stream_stop(byt, pcm_data->stream);
201 break;
202 case SNDRV_PCM_TRIGGER_SUSPEND:
203 pdata->restore_stream = false;
204 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
205 sst_byt_stream_pause(byt, pcm_data->stream);
206 break;
207 default:
208 break;
209 }
210
211 return 0;
212}
213
214static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
215{
216 struct sst_byt_pcm_data *pcm_data = data;
217 struct snd_pcm_substream *substream = pcm_data->substream;
218 struct snd_pcm_runtime *runtime = substream->runtime;
219 struct snd_soc_pcm_runtime *rtd = substream->private_data;
220 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
221 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
222 struct sst_byt *byt = pdata->byt;
223 u32 pos, hw_pos;
224
225 hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
226 snd_pcm_lib_buffer_bytes(substream));
227 pcm_data->hw_ptr = hw_pos;
228 pos = frames_to_bytes(runtime,
229 (runtime->control->appl_ptr %
230 runtime->buffer_size));
231
232 dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos);
233
234 snd_pcm_period_elapsed(substream);
235 return pos;
236}
237
238static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream)
239{
240 struct snd_soc_pcm_runtime *rtd = substream->private_data;
241 struct snd_pcm_runtime *runtime = substream->runtime;
242 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
243 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
244 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
245
246 dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr);
247
248 return bytes_to_frames(runtime, pcm_data->hw_ptr);
249}
250
251static int sst_byt_pcm_open(struct snd_pcm_substream *substream)
252{
253 struct snd_soc_pcm_runtime *rtd = substream->private_data;
254 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
255 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
256 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
257 struct sst_byt *byt = pdata->byt;
258
259 dev_dbg(rtd->dev, "PCM: open\n");
260
261 mutex_lock(&pcm_data->mutex);
262
263 pcm_data->substream = substream;
264
265 snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware);
266
267 pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1,
268 byt_notify_pointer, pcm_data);
269 if (pcm_data->stream == NULL) {
270 dev_err(rtd->dev, "failed to create stream\n");
271 mutex_unlock(&pcm_data->mutex);
272 return -EINVAL;
273 }
274
275 mutex_unlock(&pcm_data->mutex);
276 return 0;
277}
278
279static int sst_byt_pcm_close(struct snd_pcm_substream *substream)
280{
281 struct snd_soc_pcm_runtime *rtd = substream->private_data;
282 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
283 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
284 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
285 struct sst_byt *byt = pdata->byt;
286 int ret;
287
288 dev_dbg(rtd->dev, "PCM: close\n");
289
290 cancel_work_sync(&pcm_data->work);
291 mutex_lock(&pcm_data->mutex);
292 ret = sst_byt_stream_free(byt, pcm_data->stream);
293 if (ret < 0) {
294 dev_dbg(rtd->dev, "Free stream fail\n");
295 goto out;
296 }
297 pcm_data->stream = NULL;
298
299out:
300 mutex_unlock(&pcm_data->mutex);
301 return ret;
302}
303
304static int sst_byt_pcm_mmap(struct snd_pcm_substream *substream,
305 struct vm_area_struct *vma)
306{
307 struct snd_soc_pcm_runtime *rtd = substream->private_data;
308
309 dev_dbg(rtd->dev, "PCM: mmap\n");
310 return snd_pcm_lib_default_mmap(substream, vma);
311}
312
313static const struct snd_pcm_ops sst_byt_pcm_ops = {
314 .open = sst_byt_pcm_open,
315 .close = sst_byt_pcm_close,
316 .ioctl = snd_pcm_lib_ioctl,
317 .hw_params = sst_byt_pcm_hw_params,
318 .hw_free = sst_byt_pcm_hw_free,
319 .trigger = sst_byt_pcm_trigger,
320 .pointer = sst_byt_pcm_pointer,
321 .mmap = sst_byt_pcm_mmap,
322};
323
324static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd)
325{
326 struct snd_pcm *pcm = rtd->pcm;
327 size_t size;
328 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
329 struct sst_pdata *pdata = dev_get_platdata(component->dev);
330
331 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
332 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
333 size = sst_byt_pcm_hardware.buffer_bytes_max;
334 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
335 pdata->dma_dev,
336 size, size);
337 }
338
339 return 0;
340}
341
342static struct snd_soc_dai_driver byt_dais[] = {
343 {
344 .name = "Baytrail PCM",
345 .playback = {
346 .stream_name = "System Playback",
347 .channels_min = 2,
348 .channels_max = 2,
349 .rates = SNDRV_PCM_RATE_48000,
350 .formats = SNDRV_PCM_FMTBIT_S24_3LE |
351 SNDRV_PCM_FMTBIT_S16_LE,
352 },
353 .capture = {
354 .stream_name = "Analog Capture",
355 .channels_min = 2,
356 .channels_max = 2,
357 .rates = SNDRV_PCM_RATE_48000,
358 .formats = SNDRV_PCM_FMTBIT_S16_LE,
359 },
360 },
361};
362
363static int sst_byt_pcm_probe(struct snd_soc_component *component)
364{
365 struct sst_pdata *plat_data = dev_get_platdata(component->dev);
366 struct sst_byt_priv_data *priv_data;
367 int i;
368
369 if (!plat_data)
370 return -ENODEV;
371
372 priv_data = devm_kzalloc(component->dev, sizeof(*priv_data),
373 GFP_KERNEL);
374 if (!priv_data)
375 return -ENOMEM;
376 priv_data->byt = plat_data->dsp;
377 snd_soc_component_set_drvdata(component, priv_data);
378
379 for (i = 0; i < BYT_PCM_COUNT; i++) {
380 mutex_init(&priv_data->pcm[i].mutex);
381 INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work);
382 }
383
384 return 0;
385}
386
387static const struct snd_soc_component_driver byt_dai_component = {
388 .name = DRV_NAME,
389 .probe = sst_byt_pcm_probe,
390 .ops = &sst_byt_pcm_ops,
391 .pcm_new = sst_byt_pcm_new,
392};
393
394#ifdef CONFIG_PM
395static int sst_byt_pcm_dev_suspend_late(struct device *dev)
396{
397 struct sst_pdata *sst_pdata = dev_get_platdata(dev);
398 struct sst_byt_priv_data *priv_data = dev_get_drvdata(dev);
399 int ret;
400
401 dev_dbg(dev, "suspending late\n");
402
403 ret = sst_byt_dsp_suspend_late(dev, sst_pdata);
404 if (ret < 0) {
405 dev_err(dev, "failed to suspend %d\n", ret);
406 return ret;
407 }
408
409 priv_data->restore_stream = true;
410
411 return ret;
412}
413
414static int sst_byt_pcm_dev_resume_early(struct device *dev)
415{
416 struct sst_pdata *sst_pdata = dev_get_platdata(dev);
417 int ret;
418
419 dev_dbg(dev, "resume early\n");
420
421
422 ret = sst_byt_dsp_boot(dev, sst_pdata);
423 if (ret)
424 return ret;
425
426
427 return sst_byt_dsp_wait_for_ready(dev, sst_pdata);
428}
429
430static const struct dev_pm_ops sst_byt_pm_ops = {
431 .suspend_late = sst_byt_pcm_dev_suspend_late,
432 .resume_early = sst_byt_pcm_dev_resume_early,
433};
434
435#define SST_BYT_PM_OPS (&sst_byt_pm_ops)
436#else
437#define SST_BYT_PM_OPS NULL
438#endif
439
440static int sst_byt_pcm_dev_probe(struct platform_device *pdev)
441{
442 struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
443 int ret;
444
445 ret = sst_byt_dsp_init(&pdev->dev, sst_pdata);
446 if (ret < 0)
447 return -ENODEV;
448
449 ret = devm_snd_soc_register_component(&pdev->dev, &byt_dai_component,
450 byt_dais, ARRAY_SIZE(byt_dais));
451 if (ret < 0)
452 goto err_plat;
453
454 return 0;
455
456err_plat:
457 sst_byt_dsp_free(&pdev->dev, sst_pdata);
458 return ret;
459}
460
461static int sst_byt_pcm_dev_remove(struct platform_device *pdev)
462{
463 struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
464
465 sst_byt_dsp_free(&pdev->dev, sst_pdata);
466
467 return 0;
468}
469
470static struct platform_driver sst_byt_pcm_driver = {
471 .driver = {
472 .name = "baytrail-pcm-audio",
473 .pm = SST_BYT_PM_OPS,
474 },
475
476 .probe = sst_byt_pcm_dev_probe,
477 .remove = sst_byt_pcm_dev_remove,
478};
479module_platform_driver(sst_byt_pcm_driver);
480
481MODULE_AUTHOR("Jarkko Nikula");
482MODULE_DESCRIPTION("Baytrail PCM");
483MODULE_LICENSE("GPL v2");
484MODULE_ALIAS("platform:baytrail-pcm-audio");
485
