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a4b12990 MB |
1 | /* |
2 | * Intel Baytrail SST PCM Support | |
3 | * Copyright (c) 2014, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | */ | |
14 | ||
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 "sst-dsp-priv.h" | |
24 | #include "sst-dsp.h" | |
25 | ||
26 | #define BYT_PCM_COUNT 2 | |
27 | ||
28 | static const struct snd_pcm_hardware sst_byt_pcm_hardware = { | |
29 | .info = SNDRV_PCM_INFO_MMAP | | |
30 | SNDRV_PCM_INFO_MMAP_VALID | | |
31 | SNDRV_PCM_INFO_INTERLEAVED | | |
32 | SNDRV_PCM_INFO_PAUSE | | |
33 | SNDRV_PCM_INFO_RESUME, | |
34 | .formats = SNDRV_PCM_FMTBIT_S16_LE | | |
8e897618 | 35 | SNDRV_PCM_FMTBIT_S24_LE, |
a4b12990 MB |
36 | .period_bytes_min = 384, |
37 | .period_bytes_max = 48000, | |
38 | .periods_min = 2, | |
39 | .periods_max = 250, | |
40 | .buffer_bytes_max = 96000, | |
41 | }; | |
42 | ||
43 | /* private data for each PCM DSP stream */ | |
44 | struct sst_byt_pcm_data { | |
45 | struct sst_byt_stream *stream; | |
46 | struct snd_pcm_substream *substream; | |
47 | struct mutex mutex; | |
c83649e3 JN |
48 | |
49 | /* latest DSP DMA hw pointer */ | |
50 | u32 hw_ptr; | |
af94aa55 LG |
51 | |
52 | struct work_struct work; | |
a4b12990 MB |
53 | }; |
54 | ||
55 | /* private data for the driver */ | |
56 | struct sst_byt_priv_data { | |
57 | /* runtime DSP */ | |
58 | struct sst_byt *byt; | |
59 | ||
60 | /* DAI data */ | |
61 | struct sst_byt_pcm_data pcm[BYT_PCM_COUNT]; | |
62 | }; | |
63 | ||
64 | /* this may get called several times by oss emulation */ | |
65 | static int sst_byt_pcm_hw_params(struct snd_pcm_substream *substream, | |
66 | struct snd_pcm_hw_params *params) | |
67 | { | |
68 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
69 | struct sst_byt_priv_data *pdata = | |
70 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 71 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
72 | struct sst_byt *byt = pdata->byt; |
73 | u32 rate, bits; | |
74 | u8 channels; | |
75 | int ret, playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK); | |
76 | ||
77 | dev_dbg(rtd->dev, "PCM: hw_params, pcm_data %p\n", pcm_data); | |
78 | ||
79 | ret = sst_byt_stream_type(byt, pcm_data->stream, | |
80 | 1, 1, !playback); | |
81 | if (ret < 0) { | |
82 | dev_err(rtd->dev, "failed to set stream format %d\n", ret); | |
83 | return ret; | |
84 | } | |
85 | ||
86 | rate = params_rate(params); | |
87 | ret = sst_byt_stream_set_rate(byt, pcm_data->stream, rate); | |
88 | if (ret < 0) { | |
89 | dev_err(rtd->dev, "could not set rate %d\n", rate); | |
90 | return ret; | |
91 | } | |
92 | ||
93 | bits = snd_pcm_format_width(params_format(params)); | |
94 | ret = sst_byt_stream_set_bits(byt, pcm_data->stream, bits); | |
95 | if (ret < 0) { | |
96 | dev_err(rtd->dev, "could not set formats %d\n", | |
97 | params_rate(params)); | |
98 | return ret; | |
99 | } | |
100 | ||
101 | channels = (u8)(params_channels(params) & 0xF); | |
102 | ret = sst_byt_stream_set_channels(byt, pcm_data->stream, channels); | |
103 | if (ret < 0) { | |
104 | dev_err(rtd->dev, "could not set channels %d\n", | |
105 | params_rate(params)); | |
106 | return ret; | |
107 | } | |
108 | ||
109 | snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); | |
110 | ||
111 | ret = sst_byt_stream_buffer(byt, pcm_data->stream, | |
112 | substream->dma_buffer.addr, | |
113 | params_buffer_bytes(params)); | |
114 | if (ret < 0) { | |
115 | dev_err(rtd->dev, "PCM: failed to set DMA buffer %d\n", ret); | |
116 | return ret; | |
117 | } | |
118 | ||
119 | ret = sst_byt_stream_commit(byt, pcm_data->stream); | |
120 | if (ret < 0) { | |
121 | dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret); | |
122 | return ret; | |
123 | } | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | static int sst_byt_pcm_hw_free(struct snd_pcm_substream *substream) | |
129 | { | |
130 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
131 | ||
132 | dev_dbg(rtd->dev, "PCM: hw_free\n"); | |
133 | snd_pcm_lib_free_pages(substream); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
af94aa55 LG |
138 | static int sst_byt_pcm_restore_stream_context(struct snd_pcm_substream *substream) |
139 | { | |
140 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
141 | struct sst_byt_priv_data *pdata = | |
142 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 143 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
af94aa55 LG |
144 | struct sst_byt *byt = pdata->byt; |
145 | int ret; | |
146 | ||
147 | /* commit stream using existing stream params */ | |
148 | ret = sst_byt_stream_commit(byt, pcm_data->stream); | |
149 | if (ret < 0) { | |
150 | dev_err(rtd->dev, "PCM: failed stream commit %d\n", ret); | |
151 | return ret; | |
152 | } | |
153 | ||
154 | sst_byt_stream_start(byt, pcm_data->stream, pcm_data->hw_ptr); | |
155 | ||
156 | dev_dbg(rtd->dev, "stream context restored at offset %d\n", | |
157 | pcm_data->hw_ptr); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
162 | static void sst_byt_pcm_work(struct work_struct *work) | |
163 | { | |
164 | struct sst_byt_pcm_data *pcm_data = | |
165 | container_of(work, struct sst_byt_pcm_data, work); | |
166 | ||
2fa190ce KS |
167 | if (snd_pcm_running(pcm_data->substream)) |
168 | sst_byt_pcm_restore_stream_context(pcm_data->substream); | |
af94aa55 LG |
169 | } |
170 | ||
a4b12990 MB |
171 | static int sst_byt_pcm_trigger(struct snd_pcm_substream *substream, int cmd) |
172 | { | |
173 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
174 | struct sst_byt_priv_data *pdata = | |
175 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 176 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
177 | struct sst_byt *byt = pdata->byt; |
178 | ||
179 | dev_dbg(rtd->dev, "PCM: trigger %d\n", cmd); | |
180 | ||
181 | switch (cmd) { | |
182 | case SNDRV_PCM_TRIGGER_START: | |
58dcc488 | 183 | pcm_data->hw_ptr = 0; |
a6686ed5 | 184 | sst_byt_stream_start(byt, pcm_data->stream, 0); |
a4b12990 MB |
185 | break; |
186 | case SNDRV_PCM_TRIGGER_RESUME: | |
af94aa55 LG |
187 | schedule_work(&pcm_data->work); |
188 | break; | |
a4b12990 MB |
189 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
190 | sst_byt_stream_resume(byt, pcm_data->stream); | |
191 | break; | |
192 | case SNDRV_PCM_TRIGGER_STOP: | |
193 | sst_byt_stream_stop(byt, pcm_data->stream); | |
194 | break; | |
195 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
196 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
197 | sst_byt_stream_pause(byt, pcm_data->stream); | |
198 | break; | |
199 | default: | |
200 | break; | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static u32 byt_notify_pointer(struct sst_byt_stream *stream, void *data) | |
207 | { | |
208 | struct sst_byt_pcm_data *pcm_data = data; | |
209 | struct snd_pcm_substream *substream = pcm_data->substream; | |
210 | struct snd_pcm_runtime *runtime = substream->runtime; | |
211 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
c83649e3 JN |
212 | struct sst_byt_priv_data *pdata = |
213 | snd_soc_platform_get_drvdata(rtd->platform); | |
214 | struct sst_byt *byt = pdata->byt; | |
215 | u32 pos, hw_pos; | |
a4b12990 | 216 | |
c83649e3 JN |
217 | hw_pos = sst_byt_get_dsp_position(byt, pcm_data->stream, |
218 | snd_pcm_lib_buffer_bytes(substream)); | |
219 | pcm_data->hw_ptr = hw_pos; | |
a4b12990 MB |
220 | pos = frames_to_bytes(runtime, |
221 | (runtime->control->appl_ptr % | |
222 | runtime->buffer_size)); | |
223 | ||
c83649e3 | 224 | dev_dbg(rtd->dev, "PCM: App/DMA pointer %u/%u bytes\n", pos, hw_pos); |
a4b12990 MB |
225 | |
226 | snd_pcm_period_elapsed(substream); | |
227 | return pos; | |
228 | } | |
229 | ||
230 | static snd_pcm_uframes_t sst_byt_pcm_pointer(struct snd_pcm_substream *substream) | |
231 | { | |
232 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
233 | struct snd_pcm_runtime *runtime = substream->runtime; | |
3a46c7b7 LG |
234 | struct sst_byt_priv_data *pdata = |
235 | snd_soc_platform_get_drvdata(rtd->platform); | |
236 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; | |
a4b12990 | 237 | |
c83649e3 | 238 | dev_dbg(rtd->dev, "PCM: DMA pointer %u bytes\n", pcm_data->hw_ptr); |
a4b12990 | 239 | |
c83649e3 | 240 | return bytes_to_frames(runtime, pcm_data->hw_ptr); |
a4b12990 MB |
241 | } |
242 | ||
243 | static int sst_byt_pcm_open(struct snd_pcm_substream *substream) | |
244 | { | |
245 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
246 | struct sst_byt_priv_data *pdata = | |
247 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 248 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
249 | struct sst_byt *byt = pdata->byt; |
250 | ||
251 | dev_dbg(rtd->dev, "PCM: open\n"); | |
252 | ||
a4b12990 MB |
253 | mutex_lock(&pcm_data->mutex); |
254 | ||
a4b12990 MB |
255 | pcm_data->substream = substream; |
256 | ||
257 | snd_soc_set_runtime_hwparams(substream, &sst_byt_pcm_hardware); | |
258 | ||
8c44b2b1 | 259 | pcm_data->stream = sst_byt_stream_new(byt, substream->stream + 1, |
a4b12990 MB |
260 | byt_notify_pointer, pcm_data); |
261 | if (pcm_data->stream == NULL) { | |
262 | dev_err(rtd->dev, "failed to create stream\n"); | |
263 | mutex_unlock(&pcm_data->mutex); | |
264 | return -EINVAL; | |
265 | } | |
266 | ||
267 | mutex_unlock(&pcm_data->mutex); | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int sst_byt_pcm_close(struct snd_pcm_substream *substream) | |
272 | { | |
273 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
274 | struct sst_byt_priv_data *pdata = | |
275 | snd_soc_platform_get_drvdata(rtd->platform); | |
3a46c7b7 | 276 | struct sst_byt_pcm_data *pcm_data = &pdata->pcm[substream->stream]; |
a4b12990 MB |
277 | struct sst_byt *byt = pdata->byt; |
278 | int ret; | |
279 | ||
280 | dev_dbg(rtd->dev, "PCM: close\n"); | |
281 | ||
2fa190ce | 282 | cancel_work_sync(&pcm_data->work); |
a4b12990 MB |
283 | mutex_lock(&pcm_data->mutex); |
284 | ret = sst_byt_stream_free(byt, pcm_data->stream); | |
285 | if (ret < 0) { | |
286 | dev_dbg(rtd->dev, "Free stream fail\n"); | |
287 | goto out; | |
288 | } | |
289 | pcm_data->stream = NULL; | |
290 | ||
291 | out: | |
292 | mutex_unlock(&pcm_data->mutex); | |
293 | return ret; | |
294 | } | |
295 | ||
296 | static int sst_byt_pcm_mmap(struct snd_pcm_substream *substream, | |
297 | struct vm_area_struct *vma) | |
298 | { | |
299 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
300 | ||
301 | dev_dbg(rtd->dev, "PCM: mmap\n"); | |
302 | return snd_pcm_lib_default_mmap(substream, vma); | |
303 | } | |
304 | ||
305 | static struct snd_pcm_ops sst_byt_pcm_ops = { | |
306 | .open = sst_byt_pcm_open, | |
307 | .close = sst_byt_pcm_close, | |
308 | .ioctl = snd_pcm_lib_ioctl, | |
309 | .hw_params = sst_byt_pcm_hw_params, | |
310 | .hw_free = sst_byt_pcm_hw_free, | |
311 | .trigger = sst_byt_pcm_trigger, | |
312 | .pointer = sst_byt_pcm_pointer, | |
313 | .mmap = sst_byt_pcm_mmap, | |
314 | }; | |
315 | ||
316 | static void sst_byt_pcm_free(struct snd_pcm *pcm) | |
317 | { | |
318 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
319 | } | |
320 | ||
321 | static int sst_byt_pcm_new(struct snd_soc_pcm_runtime *rtd) | |
322 | { | |
323 | struct snd_pcm *pcm = rtd->pcm; | |
324 | size_t size; | |
dfe1951b JN |
325 | struct snd_soc_platform *platform = rtd->platform; |
326 | struct sst_pdata *pdata = dev_get_platdata(platform->dev); | |
a4b12990 MB |
327 | int ret = 0; |
328 | ||
a4b12990 MB |
329 | if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream || |
330 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { | |
331 | size = sst_byt_pcm_hardware.buffer_bytes_max; | |
332 | ret = snd_pcm_lib_preallocate_pages_for_all(pcm, | |
333 | SNDRV_DMA_TYPE_DEV, | |
dfe1951b | 334 | pdata->dma_dev, |
a4b12990 MB |
335 | size, size); |
336 | if (ret) { | |
337 | dev_err(rtd->dev, "dma buffer allocation failed %d\n", | |
338 | ret); | |
339 | return ret; | |
340 | } | |
341 | } | |
342 | ||
343 | return ret; | |
344 | } | |
345 | ||
346 | static struct snd_soc_dai_driver byt_dais[] = { | |
347 | { | |
49fee178 | 348 | .name = "Baytrail PCM", |
a4b12990 MB |
349 | .playback = { |
350 | .stream_name = "System Playback", | |
351 | .channels_min = 2, | |
352 | .channels_max = 2, | |
353 | .rates = SNDRV_PCM_RATE_48000, | |
354 | .formats = SNDRV_PCM_FMTBIT_S24_3LE | | |
355 | SNDRV_PCM_FMTBIT_S16_LE, | |
356 | }, | |
a4b12990 MB |
357 | .capture = { |
358 | .stream_name = "Analog Capture", | |
359 | .channels_min = 2, | |
360 | .channels_max = 2, | |
361 | .rates = SNDRV_PCM_RATE_48000, | |
362 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
363 | }, | |
364 | }, | |
365 | }; | |
366 | ||
367 | static int sst_byt_pcm_probe(struct snd_soc_platform *platform) | |
368 | { | |
369 | struct sst_pdata *plat_data = dev_get_platdata(platform->dev); | |
370 | struct sst_byt_priv_data *priv_data; | |
371 | int i; | |
372 | ||
373 | if (!plat_data) | |
374 | return -ENODEV; | |
375 | ||
376 | priv_data = devm_kzalloc(platform->dev, sizeof(*priv_data), | |
377 | GFP_KERNEL); | |
378 | priv_data->byt = plat_data->dsp; | |
379 | snd_soc_platform_set_drvdata(platform, priv_data); | |
380 | ||
49fee178 | 381 | for (i = 0; i < BYT_PCM_COUNT; i++) { |
a4b12990 | 382 | mutex_init(&priv_data->pcm[i].mutex); |
af94aa55 LG |
383 | INIT_WORK(&priv_data->pcm[i].work, sst_byt_pcm_work); |
384 | } | |
a4b12990 MB |
385 | |
386 | return 0; | |
387 | } | |
388 | ||
389 | static int sst_byt_pcm_remove(struct snd_soc_platform *platform) | |
390 | { | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static struct snd_soc_platform_driver byt_soc_platform = { | |
395 | .probe = sst_byt_pcm_probe, | |
396 | .remove = sst_byt_pcm_remove, | |
397 | .ops = &sst_byt_pcm_ops, | |
398 | .pcm_new = sst_byt_pcm_new, | |
399 | .pcm_free = sst_byt_pcm_free, | |
400 | }; | |
401 | ||
402 | static const struct snd_soc_component_driver byt_dai_component = { | |
403 | .name = "byt-dai", | |
404 | }; | |
405 | ||
af94aa55 LG |
406 | #ifdef CONFIG_PM |
407 | static int sst_byt_pcm_dev_suspend_noirq(struct device *dev) | |
408 | { | |
409 | struct sst_pdata *sst_pdata = dev_get_platdata(dev); | |
410 | int ret; | |
411 | ||
412 | dev_dbg(dev, "suspending noirq\n"); | |
413 | ||
414 | /* at this point all streams will be stopped and context saved */ | |
415 | ret = sst_byt_dsp_suspend_noirq(dev, sst_pdata); | |
416 | if (ret < 0) { | |
417 | dev_err(dev, "failed to suspend %d\n", ret); | |
418 | return ret; | |
419 | } | |
420 | ||
421 | return ret; | |
422 | } | |
423 | ||
424 | static int sst_byt_pcm_dev_suspend_late(struct device *dev) | |
425 | { | |
426 | struct sst_pdata *sst_pdata = dev_get_platdata(dev); | |
427 | int ret; | |
428 | ||
429 | dev_dbg(dev, "suspending late\n"); | |
430 | ||
431 | ret = sst_byt_dsp_suspend_late(dev, sst_pdata); | |
432 | if (ret < 0) { | |
433 | dev_err(dev, "failed to suspend %d\n", ret); | |
434 | return ret; | |
435 | } | |
436 | ||
437 | return ret; | |
438 | } | |
439 | ||
440 | static int sst_byt_pcm_dev_resume_early(struct device *dev) | |
441 | { | |
442 | struct sst_pdata *sst_pdata = dev_get_platdata(dev); | |
443 | ||
444 | dev_dbg(dev, "resume early\n"); | |
445 | ||
446 | /* load fw and boot DSP */ | |
447 | return sst_byt_dsp_boot(dev, sst_pdata); | |
448 | } | |
449 | ||
450 | static int sst_byt_pcm_dev_resume(struct device *dev) | |
451 | { | |
452 | struct sst_pdata *sst_pdata = dev_get_platdata(dev); | |
453 | ||
454 | dev_dbg(dev, "resume\n"); | |
455 | ||
456 | /* wait for FW to finish booting */ | |
457 | return sst_byt_dsp_wait_for_ready(dev, sst_pdata); | |
458 | } | |
459 | ||
460 | static const struct dev_pm_ops sst_byt_pm_ops = { | |
461 | .suspend_noirq = sst_byt_pcm_dev_suspend_noirq, | |
462 | .suspend_late = sst_byt_pcm_dev_suspend_late, | |
463 | .resume_early = sst_byt_pcm_dev_resume_early, | |
464 | .resume = sst_byt_pcm_dev_resume, | |
465 | }; | |
466 | ||
467 | #define SST_BYT_PM_OPS (&sst_byt_pm_ops) | |
468 | #else | |
469 | #define SST_BYT_PM_OPS NULL | |
470 | #endif | |
471 | ||
a4b12990 MB |
472 | static int sst_byt_pcm_dev_probe(struct platform_device *pdev) |
473 | { | |
474 | struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev); | |
475 | int ret; | |
476 | ||
477 | ret = sst_byt_dsp_init(&pdev->dev, sst_pdata); | |
478 | if (ret < 0) | |
479 | return -ENODEV; | |
480 | ||
481 | ret = snd_soc_register_platform(&pdev->dev, &byt_soc_platform); | |
482 | if (ret < 0) | |
483 | goto err_plat; | |
484 | ||
485 | ret = snd_soc_register_component(&pdev->dev, &byt_dai_component, | |
486 | byt_dais, ARRAY_SIZE(byt_dais)); | |
487 | if (ret < 0) | |
488 | goto err_comp; | |
489 | ||
490 | return 0; | |
491 | ||
492 | err_comp: | |
493 | snd_soc_unregister_platform(&pdev->dev); | |
494 | err_plat: | |
495 | sst_byt_dsp_free(&pdev->dev, sst_pdata); | |
496 | return ret; | |
497 | } | |
498 | ||
499 | static int sst_byt_pcm_dev_remove(struct platform_device *pdev) | |
500 | { | |
501 | struct sst_pdata *sst_pdata = dev_get_platdata(&pdev->dev); | |
502 | ||
503 | snd_soc_unregister_platform(&pdev->dev); | |
504 | snd_soc_unregister_component(&pdev->dev); | |
505 | sst_byt_dsp_free(&pdev->dev, sst_pdata); | |
506 | ||
507 | return 0; | |
508 | } | |
509 | ||
510 | static struct platform_driver sst_byt_pcm_driver = { | |
511 | .driver = { | |
512 | .name = "baytrail-pcm-audio", | |
513 | .owner = THIS_MODULE, | |
af94aa55 | 514 | .pm = SST_BYT_PM_OPS, |
a4b12990 MB |
515 | }, |
516 | ||
517 | .probe = sst_byt_pcm_dev_probe, | |
518 | .remove = sst_byt_pcm_dev_remove, | |
519 | }; | |
520 | module_platform_driver(sst_byt_pcm_driver); | |
521 | ||
522 | MODULE_AUTHOR("Jarkko Nikula"); | |
523 | MODULE_DESCRIPTION("Baytrail PCM"); | |
524 | MODULE_LICENSE("GPL v2"); | |
525 | MODULE_ALIAS("platform:baytrail-pcm-audio"); |