This source file includes following definitions.
- sst_byt_pcm_hw_params
- sst_byt_pcm_hw_free
- sst_byt_pcm_restore_stream_context
- sst_byt_pcm_work
- sst_byt_pcm_trigger
- byt_notify_pointer
- sst_byt_pcm_pointer
- sst_byt_pcm_open
- sst_byt_pcm_close
- sst_byt_pcm_mmap
- sst_byt_pcm_new
- sst_byt_pcm_probe
- sst_byt_pcm_dev_suspend_late
- sst_byt_pcm_dev_resume_early
- sst_byt_pcm_dev_probe
- sst_byt_pcm_dev_remove
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6
7 #include <linux/module.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/slab.h>
10 #include <sound/core.h>
11 #include <sound/pcm.h>
12 #include <sound/pcm_params.h>
13 #include <sound/soc.h>
14 #include "sst-baytrail-ipc.h"
15 #include "../common/sst-dsp-priv.h"
16 #include "../common/sst-dsp.h"
17
18 #define DRV_NAME "byt-dai"
19 #define BYT_PCM_COUNT 2
20
21 static const struct snd_pcm_hardware sst_byt_pcm_hardware = {
22 .info = SNDRV_PCM_INFO_MMAP |
23 SNDRV_PCM_INFO_MMAP_VALID |
24 SNDRV_PCM_INFO_INTERLEAVED |
25 SNDRV_PCM_INFO_PAUSE |
26 SNDRV_PCM_INFO_RESUME,
27 .formats = SNDRV_PCM_FMTBIT_S16_LE |
28 SNDRV_PCM_FMTBIT_S24_LE,
29 .period_bytes_min = 384,
30 .period_bytes_max = 48000,
31 .periods_min = 2,
32 .periods_max = 250,
33 .buffer_bytes_max = 96000,
34 };
35
36
37 struct sst_byt_pcm_data {
38 struct sst_byt_stream *stream;
39 struct snd_pcm_substream *substream;
40 struct mutex mutex;
41
42
43 u32 hw_ptr;
44
45 struct work_struct work;
46 };
47
48
49 struct sst_byt_priv_data {
50
51 struct sst_byt *byt;
52
53
54 struct sst_byt_pcm_data pcm[BYT_PCM_COUNT];
55
56
57 bool restore_stream;
58 };
59
60
61 static int sst_byt_pcm_hw_params(struct snd_pcm_substream *substream,
62 struct snd_pcm_hw_params *params)
63 {
64 struct snd_soc_pcm_runtime *rtd = substream->private_data;
65 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
66 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
67 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
68 struct sst_byt *byt = pdata->byt;
69 u32 rate, bits;
70 u8 channels;
71 int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
72
73 dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data);
74
75 ret = sst_byt_stream_type(byt, pcm_data->stream,
76 1, 1, !playback);
77 if (ret < 0) {
78 dev_err(rtd->dev, "failed to set stream format %d\n", ret);
79 return ret;
80 }
81
82 rate = params_rate(params);
83 ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate);
84 if (ret < 0) {
85 dev_err(rtd->dev, "could not set rate %d\n", rate);
86 return ret;
87 }
88
89 bits = snd_pcm_format_width(params_format(params));
90 ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits);
91 if (ret < 0) {
92 dev_err(rtd->dev, "could not set formats %d\n",
93 params_rate(params));
94 return ret;
95 }
96
97 channels = (u8)(params_channels(params) & 0xF);
98 ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels);
99 if (ret < 0) {
100 dev_err(rtd->dev, "could not set channels %d\n",
101 params_rate(params));
102 return ret;
103 }
104
105 snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
106
107 ret = sst_byt_stream_buffer(byt, pcm_data->stream,
108 substream->dma_buffer.addr,
109 params_buffer_bytes(params));
110 if (ret < 0) {
111 dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret);
112 return ret;
113 }
114
115 ret = sst_byt_stream_commit(byt, pcm_data->stream);
116 if (ret < 0) {
117 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
118 return ret;
119 }
120
121 return 0;
122 }
123
124 static int sst_byt_pcm_hw_free(struct snd_pcm_substream *substream)
125 {
126 struct snd_soc_pcm_runtime *rtd = substream->private_data;
127
128 dev_dbg(rtd->dev, "PCM: hw_free\n");
129 snd_pcm_lib_free_pages(substream);
130
131 return 0;
132 }
133
134 static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream)
135 {
136 struct snd_soc_pcm_runtime *rtd = substream->private_data;
137 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
138 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
139 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
140 struct sst_byt *byt = pdata->byt;
141 int ret;
142
143
144 ret = sst_byt_stream_commit(byt, pcm_data->stream);
145 if (ret < 0) {
146 dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret);
147 return ret;
148 }
149
150 sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr);
151
152 dev_dbg(rtd->dev, "stream context restored at offset %d\n",
153 pcm_data->hw_ptr);
154
155 return 0;
156 }
157
158 static void sst_byt_pcm_work(struct work_struct *work)
159 {
160 struct sst_byt_pcm_data *pcm_data =
161 container_of(work, struct sst_byt_pcm_data, work);
162
163 if (snd_pcm_running(pcm_data->substream))
164 sst_byt_pcm_restore_stream_context(pcm_data->substream);
165 }
166
167 static int sst_byt_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
168 {
169 struct snd_soc_pcm_runtime *rtd = substream->private_data;
170 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
171 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
172 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
173 struct sst_byt *byt = pdata->byt;
174
175 dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd);
176
177 switch (cmd) {
178 case SNDRV_PCM_TRIGGER_START:
179 pcm_data->hw_ptr = 0;
180 sst_byt_stream_start(byt, pcm_data->stream, 0);
181 break;
182 case SNDRV_PCM_TRIGGER_RESUME:
183 if (pdata->restore_stream)
184 schedule_work(&pcm_data->work);
185 else
186 sst_byt_stream_resume(byt, pcm_data->stream);
187 break;
188 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
189 sst_byt_stream_resume(byt, pcm_data->stream);
190 break;
191 case SNDRV_PCM_TRIGGER_STOP:
192 sst_byt_stream_stop(byt, pcm_data->stream);
193 break;
194 case SNDRV_PCM_TRIGGER_SUSPEND:
195 pdata->restore_stream = false;
196
197 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
198 sst_byt_stream_pause(byt, pcm_data->stream);
199 break;
200 default:
201 break;
202 }
203
204 return 0;
205 }
206
207 static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data)
208 {
209 struct sst_byt_pcm_data *pcm_data = data;
210 struct snd_pcm_substream *substream = pcm_data->substream;
211 struct snd_pcm_runtime *runtime = substream->runtime;
212 struct snd_soc_pcm_runtime *rtd = substream->private_data;
213 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
214 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
215 struct sst_byt *byt = pdata->byt;
216 u32 pos, hw_pos;
217
218 hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream,
219 snd_pcm_lib_buffer_bytes(substream));
220 pcm_data->hw_ptr = hw_pos;
221 pos = frames_to_bytes(runtime,
222 (runtime->control->appl_ptr %
223 runtime->buffer_size));
224
225 dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos);
226
227 snd_pcm_period_elapsed(substream);
228 return pos;
229 }
230
231 static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream)
232 {
233 struct snd_soc_pcm_runtime *rtd = substream->private_data;
234 struct snd_pcm_runtime *runtime = substream->runtime;
235 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
236 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
237 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
238
239 dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr);
240
241 return bytes_to_frames(runtime, pcm_data->hw_ptr);
242 }
243
244 static int sst_byt_pcm_open(struct snd_pcm_substream *substream)
245 {
246 struct snd_soc_pcm_runtime *rtd = substream->private_data;
247 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
248 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
249 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
250 struct sst_byt *byt = pdata->byt;
251
252 dev_dbg(rtd->dev, "PCM: open\n");
253
254 mutex_lock(&pcm_data->mutex);
255
256 pcm_data->substream = substream;
257
258 snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware);
259
260 pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1,
261 byt_notify_pointer, pcm_data);
262 if (pcm_data->stream == NULL) {
263 dev_err(rtd->dev, "failed to create stream\n");
264 mutex_unlock(&pcm_data->mutex);
265 return -EINVAL;
266 }
267
268 mutex_unlock(&pcm_data->mutex);
269 return 0;
270 }
271
272 static int sst_byt_pcm_close(struct snd_pcm_substream *substream)
273 {
274 struct snd_soc_pcm_runtime *rtd = substream->private_data;
275 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
276 struct sst_byt_priv_data *pdata = snd_soc_component_get_drvdata(component);
277 struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream];
278 struct sst_byt *byt = pdata->byt;
279 int ret;
280
281 dev_dbg(rtd->dev, "PCM: close\n");
282
283 cancel_work_sync(&pcm_data->work);
284 mutex_lock(&pcm_data->mutex);
285 ret = sst_byt_stream_free(byt, pcm_data->stream);
286 if (ret < 0) {
287 dev_dbg(rtd->dev, "Free stream fail\n");
288 goto out;
289 }
290 pcm_data->stream = NULL;
291
292 out:
293 mutex_unlock(&pcm_data->mutex);
294 return ret;
295 }
296
297 static int sst_byt_pcm_mmap(struct snd_pcm_substream *substream,
298 struct vm_area_struct *vma)
299 {
300 struct snd_soc_pcm_runtime *rtd = substream->private_data;
301
302 dev_dbg(rtd->dev, "PCM: mmap\n");
303 return snd_pcm_lib_default_mmap(substream, vma);
304 }
305
306 static const struct snd_pcm_ops sst_byt_pcm_ops = {
307 .open = sst_byt_pcm_open,
308 .close = sst_byt_pcm_close,
309 .ioctl = snd_pcm_lib_ioctl,
310 .hw_params = sst_byt_pcm_hw_params,
311 .hw_free = sst_byt_pcm_hw_free,
312 .trigger = sst_byt_pcm_trigger,
313 .pointer = sst_byt_pcm_pointer,
314 .mmap = sst_byt_pcm_mmap,
315 };
316
317 static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd)
318 {
319 struct snd_pcm *pcm = rtd->pcm;
320 size_t size;
321 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
322 struct sst_pdata *pdata = dev_get_platdata(component->dev);
323
324 if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
325 pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
326 size = sst_byt_pcm_hardware.buffer_bytes_max;
327 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
328 pdata->dma_dev,
329 size, size);
330 }
331
332 return 0;
333 }
334
335 static struct snd_soc_dai_driver byt_dais[] = {
336 {
337 .name = "Baytrail PCM",
338 .playback = {
339 .stream_name = "System Playback",
340 .channels_min = 2,
341 .channels_max = 2,
342 .rates = SNDRV_PCM_RATE_48000,
343 .formats = SNDRV_PCM_FMTBIT_S24_3LE |
344 SNDRV_PCM_FMTBIT_S16_LE,
345 },
346 .capture = {
347 .stream_name = "Analog Capture",
348 .channels_min = 2,
349 .channels_max = 2,
350 .rates = SNDRV_PCM_RATE_48000,
351 .formats = SNDRV_PCM_FMTBIT_S16_LE,
352 },
353 },
354 };
355
356 static int sst_byt_pcm_probe(struct snd_soc_component *component)
357 {
358 struct sst_pdata *plat_data = dev_get_platdata(component->dev);
359 struct sst_byt_priv_data *priv_data;
360 int i;
361
362 if (!plat_data)
363 return -ENODEV;
364
365 priv_data = devm_kzalloc(component->dev, sizeof(*priv_data),
366 GFP_KERNEL);
367 if (!priv_data)
368 return -ENOMEM;
369 priv_data->byt = plat_data->dsp;
370 snd_soc_component_set_drvdata(component, priv_data);
371
372 for (i = 0; i < BYT_PCM_COUNT; i++) {
373 mutex_init(&priv_data->pcm[i].mutex);
374 INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work);
375 }
376
377 return 0;
378 }
379
380 static const struct snd_soc_component_driver byt_dai_component = {
381 .name = DRV_NAME,
382 .probe = sst_byt_pcm_probe,
383 .ops = &sst_byt_pcm_ops,
384 .pcm_new = sst_byt_pcm_new,
385 };
386
387 #ifdef CONFIG_PM
388 static int sst_byt_pcm_dev_suspend_late(struct device *dev)
389 {
390 struct sst_pdata *sst_pdata = dev_get_platdata(dev);
391 struct sst_byt_priv_data *priv_data = dev_get_drvdata(dev);
392 int ret;
393
394 dev_dbg(dev, "suspending late\n");
395
396 ret = sst_byt_dsp_suspend_late(dev, sst_pdata);
397 if (ret < 0) {
398 dev_err(dev, "failed to suspend %d\n", ret);
399 return ret;
400 }
401
402 priv_data->restore_stream = true;
403
404 return ret;
405 }
406
407 static int sst_byt_pcm_dev_resume_early(struct device *dev)
408 {
409 struct sst_pdata *sst_pdata = dev_get_platdata(dev);
410 int ret;
411
412 dev_dbg(dev, "resume early\n");
413
414
415 ret = sst_byt_dsp_boot(dev, sst_pdata);
416 if (ret)
417 return ret;
418
419
420 return sst_byt_dsp_wait_for_ready(dev, sst_pdata);
421 }
422
423 static const struct dev_pm_ops sst_byt_pm_ops = {
424 .suspend_late = sst_byt_pcm_dev_suspend_late,
425 .resume_early = sst_byt_pcm_dev_resume_early,
426 };
427
428 #define SST_BYT_PM_OPS (&sst_byt_pm_ops)
429 #else
430 #define SST_BYT_PM_OPS NULL
431 #endif
432
433 static int sst_byt_pcm_dev_probe(struct platform_device *pdev)
434 {
435 struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
436 int ret;
437
438 ret = sst_byt_dsp_init(&pdev->dev, sst_pdata);
439 if (ret < 0)
440 return -ENODEV;
441
442 ret = devm_snd_soc_register_component(&pdev->dev, &byt_dai_component,
443 byt_dais, ARRAY_SIZE(byt_dais));
444 if (ret < 0)
445 goto err_plat;
446
447 return 0;
448
449 err_plat:
450 sst_byt_dsp_free(&pdev->dev, sst_pdata);
451 return ret;
452 }
453
454 static int sst_byt_pcm_dev_remove(struct platform_device *pdev)
455 {
456 struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev);
457
458 sst_byt_dsp_free(&pdev->dev, sst_pdata);
459
460 return 0;
461 }
462
463 static struct platform_driver sst_byt_pcm_driver = {
464 .driver = {
465 .name = "baytrail-pcm-audio",
466 .pm = SST_BYT_PM_OPS,
467 },
468
469 .probe = sst_byt_pcm_dev_probe,
470 .remove = sst_byt_pcm_dev_remove,
471 };
472 module_platform_driver(sst_byt_pcm_driver);
473
474 MODULE_AUTHOR("Jarkko Nikula");
475 MODULE_DESCRIPTION("Baytrail PCM");
476 MODULE_LICENSE("GPL v2");
477 MODULE_ALIAS("platform:baytrail-pcm-audio");