Commit | Line | Data |
---|---|---|
c0f41bb1 | 1 | /* |
4b640cf3 | 2 | * dma.c -- ALSA Soc Audio Layer |
c0f41bb1 BD |
3 | * |
4 | * (c) 2006 Wolfson Microelectronics PLC. | |
5 | * Graeme Gregory graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com | |
6 | * | |
c8efef17 | 7 | * Copyright 2004-2005 Simtec Electronics |
c0f41bb1 BD |
8 | * http://armlinux.simtec.co.uk/ |
9 | * Ben Dooks <ben@simtec.co.uk> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
c0f41bb1 BD |
15 | */ |
16 | ||
c0f41bb1 BD |
17 | #include <linux/slab.h> |
18 | #include <linux/dma-mapping.h> | |
19 | ||
c0f41bb1 | 20 | #include <sound/soc.h> |
0378b6ac | 21 | #include <sound/pcm_params.h> |
c0f41bb1 BD |
22 | |
23 | #include <asm/dma.h> | |
a09e64fb RK |
24 | #include <mach/hardware.h> |
25 | #include <mach/dma.h> | |
c0f41bb1 | 26 | |
4b640cf3 | 27 | #include "dma.h" |
c0f41bb1 | 28 | |
f7f74181 SY |
29 | #define ST_RUNNING (1<<0) |
30 | #define ST_OPENED (1<<1) | |
31 | ||
c3f2028b | 32 | static const struct snd_pcm_hardware dma_hardware = { |
c0f41bb1 BD |
33 | .info = SNDRV_PCM_INFO_INTERLEAVED | |
34 | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
35 | SNDRV_PCM_INFO_MMAP | | |
96d90e19 GG |
36 | SNDRV_PCM_INFO_MMAP_VALID | |
37 | SNDRV_PCM_INFO_PAUSE | | |
38 | SNDRV_PCM_INFO_RESUME, | |
c0f41bb1 BD |
39 | .formats = SNDRV_PCM_FMTBIT_S16_LE | |
40 | SNDRV_PCM_FMTBIT_U16_LE | | |
41 | SNDRV_PCM_FMTBIT_U8 | | |
42 | SNDRV_PCM_FMTBIT_S8, | |
43 | .channels_min = 2, | |
44 | .channels_max = 2, | |
45 | .buffer_bytes_max = 128*1024, | |
46 | .period_bytes_min = PAGE_SIZE, | |
47 | .period_bytes_max = PAGE_SIZE*2, | |
48 | .periods_min = 2, | |
49 | .periods_max = 128, | |
50 | .fifo_size = 32, | |
51 | }; | |
52 | ||
c3f2028b | 53 | struct runtime_data { |
c0f41bb1 BD |
54 | spinlock_t lock; |
55 | int state; | |
56 | unsigned int dma_loaded; | |
c0f41bb1 BD |
57 | unsigned int dma_period; |
58 | dma_addr_t dma_start; | |
59 | dma_addr_t dma_pos; | |
60 | dma_addr_t dma_end; | |
faa31776 | 61 | struct s3c_dma_params *params; |
c0f41bb1 BD |
62 | }; |
63 | ||
344b4c48 BK |
64 | static void audio_buffdone(void *data); |
65 | ||
c3f2028b | 66 | /* dma_enqueue |
c0f41bb1 BD |
67 | * |
68 | * place a dma buffer onto the queue for the dma system | |
69 | * to handle. | |
344b4c48 | 70 | */ |
c3f2028b | 71 | static void dma_enqueue(struct snd_pcm_substream *substream) |
c0f41bb1 | 72 | { |
c3f2028b | 73 | struct runtime_data *prtd = substream->runtime->private_data; |
c0f41bb1 | 74 | dma_addr_t pos = prtd->dma_pos; |
e3d80248 | 75 | unsigned int limit; |
344b4c48 | 76 | struct samsung_dma_prep_info dma_info; |
c0f41bb1 | 77 | |
ee7d4767 | 78 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 | 79 | |
344b4c48 | 80 | limit = (prtd->dma_end - prtd->dma_start) / prtd->dma_period; |
e3d80248 | 81 | |
d3ff5a3e JB |
82 | pr_debug("%s: loaded %d, limit %d\n", |
83 | __func__, prtd->dma_loaded, limit); | |
e3d80248 | 84 | |
344b4c48 BK |
85 | dma_info.cap = (samsung_dma_has_circular() ? DMA_CYCLIC : DMA_SLAVE); |
86 | dma_info.direction = | |
87 | (substream->stream == SNDRV_PCM_STREAM_PLAYBACK | |
88 | ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
89 | dma_info.fp = audio_buffdone; | |
90 | dma_info.fp_param = substream; | |
91 | dma_info.period = prtd->dma_period; | |
92 | dma_info.len = prtd->dma_period*limit; | |
c0f41bb1 | 93 | |
344b4c48 | 94 | while (prtd->dma_loaded < limit) { |
ee7d4767 | 95 | pr_debug("dma_loaded: %d\n", prtd->dma_loaded); |
c0f41bb1 | 96 | |
344b4c48 BK |
97 | if ((pos + dma_info.period) > prtd->dma_end) { |
98 | dma_info.period = prtd->dma_end - pos; | |
99 | pr_debug("%s: corrected dma len %ld\n", | |
100 | __func__, dma_info.period); | |
c0f41bb1 BD |
101 | } |
102 | ||
344b4c48 BK |
103 | dma_info.buf = pos; |
104 | prtd->params->ops->prepare(prtd->params->ch, &dma_info); | |
c0f41bb1 | 105 | |
344b4c48 BK |
106 | prtd->dma_loaded++; |
107 | pos += prtd->dma_period; | |
108 | if (pos >= prtd->dma_end) | |
109 | pos = prtd->dma_start; | |
c0f41bb1 BD |
110 | } |
111 | ||
112 | prtd->dma_pos = pos; | |
113 | } | |
114 | ||
344b4c48 | 115 | static void audio_buffdone(void *data) |
c0f41bb1 | 116 | { |
344b4c48 BK |
117 | struct snd_pcm_substream *substream = data; |
118 | struct runtime_data *prtd = substream->runtime->private_data; | |
c0f41bb1 | 119 | |
ee7d4767 | 120 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 | 121 | |
344b4c48 BK |
122 | if (prtd->state & ST_RUNNING) { |
123 | prtd->dma_pos += prtd->dma_period; | |
124 | if (prtd->dma_pos >= prtd->dma_end) | |
125 | prtd->dma_pos = prtd->dma_start; | |
5111c075 | 126 | |
344b4c48 BK |
127 | if (substream) |
128 | snd_pcm_period_elapsed(substream); | |
c0f41bb1 | 129 | |
344b4c48 BK |
130 | spin_lock(&prtd->lock); |
131 | if (!samsung_dma_has_circular()) { | |
132 | prtd->dma_loaded--; | |
133 | dma_enqueue(substream); | |
134 | } | |
135 | spin_unlock(&prtd->lock); | |
c0f41bb1 | 136 | } |
c0f41bb1 BD |
137 | } |
138 | ||
c3f2028b | 139 | static int dma_hw_params(struct snd_pcm_substream *substream, |
c0f41bb1 BD |
140 | struct snd_pcm_hw_params *params) |
141 | { | |
142 | struct snd_pcm_runtime *runtime = substream->runtime; | |
c3f2028b | 143 | struct runtime_data *prtd = runtime->private_data; |
c0f41bb1 | 144 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
c0f41bb1 | 145 | unsigned long totbytes = params_buffer_bytes(params); |
5f712b2b | 146 | struct s3c_dma_params *dma = |
f0fba2ad | 147 | snd_soc_dai_get_dma_data(rtd->cpu_dai, substream); |
344b4c48 | 148 | struct samsung_dma_info dma_info; |
5f712b2b | 149 | |
ee7d4767 | 150 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 BD |
151 | |
152 | /* return if this is a bufferless transfer e.g. | |
153 | * codec <--> BT codec or GSM modem -- lg FIXME */ | |
154 | if (!dma) | |
155 | return 0; | |
156 | ||
646ab160 HW |
157 | /* this may get called several times by oss emulation |
158 | * with different params -HW */ | |
159 | if (prtd->params == NULL) { | |
160 | /* prepare DMA */ | |
161 | prtd->params = dma; | |
c0f41bb1 | 162 | |
ee7d4767 | 163 | pr_debug("params %p, client %p, channel %d\n", prtd->params, |
646ab160 | 164 | prtd->params->client, prtd->params->channel); |
c0f41bb1 | 165 | |
344b4c48 BK |
166 | prtd->params->ops = samsung_dma_get_ops(); |
167 | ||
168 | dma_info.cap = (samsung_dma_has_circular() ? | |
169 | DMA_CYCLIC : DMA_SLAVE); | |
170 | dma_info.client = prtd->params->client; | |
171 | dma_info.direction = | |
172 | (substream->stream == SNDRV_PCM_STREAM_PLAYBACK | |
173 | ? DMA_TO_DEVICE : DMA_FROM_DEVICE); | |
174 | dma_info.width = prtd->params->dma_size; | |
175 | dma_info.fifo = prtd->params->dma_addr; | |
176 | prtd->params->ch = prtd->params->ops->request( | |
177 | prtd->params->channel, &dma_info); | |
c0f41bb1 BD |
178 | } |
179 | ||
c0f41bb1 BD |
180 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
181 | ||
182 | runtime->dma_bytes = totbytes; | |
183 | ||
184 | spin_lock_irq(&prtd->lock); | |
185 | prtd->dma_loaded = 0; | |
c0f41bb1 BD |
186 | prtd->dma_period = params_period_bytes(params); |
187 | prtd->dma_start = runtime->dma_addr; | |
188 | prtd->dma_pos = prtd->dma_start; | |
189 | prtd->dma_end = prtd->dma_start + totbytes; | |
190 | spin_unlock_irq(&prtd->lock); | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
c3f2028b | 195 | static int dma_hw_free(struct snd_pcm_substream *substream) |
c0f41bb1 | 196 | { |
c3f2028b | 197 | struct runtime_data *prtd = substream->runtime->private_data; |
c0f41bb1 | 198 | |
ee7d4767 | 199 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 | 200 | |
c0f41bb1 BD |
201 | snd_pcm_set_runtime_buffer(substream, NULL); |
202 | ||
7f1bc26e | 203 | if (prtd->params) { |
2ca95769 | 204 | prtd->params->ops->flush(prtd->params->ch); |
344b4c48 BK |
205 | prtd->params->ops->release(prtd->params->ch, |
206 | prtd->params->client); | |
c0f41bb1 BD |
207 | prtd->params = NULL; |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
c3f2028b | 213 | static int dma_prepare(struct snd_pcm_substream *substream) |
c0f41bb1 | 214 | { |
c3f2028b | 215 | struct runtime_data *prtd = substream->runtime->private_data; |
c0f41bb1 BD |
216 | int ret = 0; |
217 | ||
ee7d4767 | 218 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 BD |
219 | |
220 | /* return if this is a bufferless transfer e.g. | |
221 | * codec <--> BT codec or GSM modem -- lg FIXME */ | |
222 | if (!prtd->params) | |
5111c075 | 223 | return 0; |
c0f41bb1 BD |
224 | |
225 | /* flush the DMA channel */ | |
344b4c48 BK |
226 | prtd->params->ops->flush(prtd->params->ch); |
227 | ||
c0f41bb1 BD |
228 | prtd->dma_loaded = 0; |
229 | prtd->dma_pos = prtd->dma_start; | |
230 | ||
231 | /* enqueue dma buffers */ | |
c3f2028b | 232 | dma_enqueue(substream); |
c0f41bb1 BD |
233 | |
234 | return ret; | |
235 | } | |
236 | ||
c3f2028b | 237 | static int dma_trigger(struct snd_pcm_substream *substream, int cmd) |
c0f41bb1 | 238 | { |
c3f2028b | 239 | struct runtime_data *prtd = substream->runtime->private_data; |
c0f41bb1 BD |
240 | int ret = 0; |
241 | ||
ee7d4767 | 242 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 BD |
243 | |
244 | spin_lock(&prtd->lock); | |
245 | ||
246 | switch (cmd) { | |
247 | case SNDRV_PCM_TRIGGER_START: | |
248 | case SNDRV_PCM_TRIGGER_RESUME: | |
249 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
250 | prtd->state |= ST_RUNNING; | |
344b4c48 | 251 | prtd->params->ops->trigger(prtd->params->ch); |
c0f41bb1 BD |
252 | break; |
253 | ||
254 | case SNDRV_PCM_TRIGGER_STOP: | |
255 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
256 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
257 | prtd->state &= ~ST_RUNNING; | |
344b4c48 | 258 | prtd->params->ops->stop(prtd->params->ch); |
c0f41bb1 BD |
259 | break; |
260 | ||
261 | default: | |
262 | ret = -EINVAL; | |
263 | break; | |
264 | } | |
265 | ||
266 | spin_unlock(&prtd->lock); | |
267 | ||
268 | return ret; | |
269 | } | |
270 | ||
5111c075 | 271 | static snd_pcm_uframes_t |
c3f2028b | 272 | dma_pointer(struct snd_pcm_substream *substream) |
c0f41bb1 BD |
273 | { |
274 | struct snd_pcm_runtime *runtime = substream->runtime; | |
c3f2028b | 275 | struct runtime_data *prtd = runtime->private_data; |
c0f41bb1 | 276 | unsigned long res; |
c0f41bb1 | 277 | |
ee7d4767 | 278 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 | 279 | |
344b4c48 | 280 | res = prtd->dma_pos - prtd->dma_start; |
c0f41bb1 | 281 | |
344b4c48 | 282 | pr_debug("Pointer offset: %lu\n", res); |
c0f41bb1 BD |
283 | |
284 | /* we seem to be getting the odd error from the pcm library due | |
285 | * to out-of-bounds pointers. this is maybe due to the dma engine | |
286 | * not having loaded the new values for the channel before being | |
ceade6c8 | 287 | * called... (todo - fix ) |
c0f41bb1 BD |
288 | */ |
289 | ||
290 | if (res >= snd_pcm_lib_buffer_bytes(substream)) { | |
291 | if (res == snd_pcm_lib_buffer_bytes(substream)) | |
292 | res = 0; | |
293 | } | |
294 | ||
295 | return bytes_to_frames(substream->runtime, res); | |
296 | } | |
297 | ||
c3f2028b | 298 | static int dma_open(struct snd_pcm_substream *substream) |
c0f41bb1 BD |
299 | { |
300 | struct snd_pcm_runtime *runtime = substream->runtime; | |
c3f2028b | 301 | struct runtime_data *prtd; |
c0f41bb1 | 302 | |
ee7d4767 | 303 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 | 304 | |
f61c890e | 305 | snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); |
c3f2028b | 306 | snd_soc_set_runtime_hwparams(substream, &dma_hardware); |
c0f41bb1 | 307 | |
c3f2028b | 308 | prtd = kzalloc(sizeof(struct runtime_data), GFP_KERNEL); |
c0f41bb1 BD |
309 | if (prtd == NULL) |
310 | return -ENOMEM; | |
311 | ||
c72816b7 ZD |
312 | spin_lock_init(&prtd->lock); |
313 | ||
c0f41bb1 BD |
314 | runtime->private_data = prtd; |
315 | return 0; | |
316 | } | |
317 | ||
c3f2028b | 318 | static int dma_close(struct snd_pcm_substream *substream) |
c0f41bb1 BD |
319 | { |
320 | struct snd_pcm_runtime *runtime = substream->runtime; | |
c3f2028b | 321 | struct runtime_data *prtd = runtime->private_data; |
c0f41bb1 | 322 | |
ee7d4767 | 323 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 | 324 | |
5111c075 | 325 | if (!prtd) |
c3f2028b | 326 | pr_debug("dma_close called with prtd == NULL\n"); |
c0f41bb1 | 327 | |
5111c075 MB |
328 | kfree(prtd); |
329 | ||
c0f41bb1 BD |
330 | return 0; |
331 | } | |
332 | ||
c3f2028b | 333 | static int dma_mmap(struct snd_pcm_substream *substream, |
c0f41bb1 BD |
334 | struct vm_area_struct *vma) |
335 | { | |
336 | struct snd_pcm_runtime *runtime = substream->runtime; | |
337 | ||
ee7d4767 | 338 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 BD |
339 | |
340 | return dma_mmap_writecombine(substream->pcm->card->dev, vma, | |
5111c075 MB |
341 | runtime->dma_area, |
342 | runtime->dma_addr, | |
343 | runtime->dma_bytes); | |
c0f41bb1 BD |
344 | } |
345 | ||
c3f2028b JB |
346 | static struct snd_pcm_ops dma_ops = { |
347 | .open = dma_open, | |
348 | .close = dma_close, | |
c0f41bb1 | 349 | .ioctl = snd_pcm_lib_ioctl, |
c3f2028b JB |
350 | .hw_params = dma_hw_params, |
351 | .hw_free = dma_hw_free, | |
352 | .prepare = dma_prepare, | |
353 | .trigger = dma_trigger, | |
354 | .pointer = dma_pointer, | |
355 | .mmap = dma_mmap, | |
c0f41bb1 BD |
356 | }; |
357 | ||
c3f2028b | 358 | static int preallocate_dma_buffer(struct snd_pcm *pcm, int stream) |
c0f41bb1 BD |
359 | { |
360 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | |
361 | struct snd_dma_buffer *buf = &substream->dma_buffer; | |
c3f2028b | 362 | size_t size = dma_hardware.buffer_bytes_max; |
c0f41bb1 | 363 | |
ee7d4767 | 364 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 BD |
365 | |
366 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
367 | buf->dev.dev = pcm->card->dev; | |
368 | buf->private_data = NULL; | |
369 | buf->area = dma_alloc_writecombine(pcm->card->dev, size, | |
370 | &buf->addr, GFP_KERNEL); | |
371 | if (!buf->area) | |
372 | return -ENOMEM; | |
373 | buf->bytes = size; | |
374 | return 0; | |
375 | } | |
376 | ||
c3f2028b | 377 | static void dma_free_dma_buffers(struct snd_pcm *pcm) |
c0f41bb1 BD |
378 | { |
379 | struct snd_pcm_substream *substream; | |
380 | struct snd_dma_buffer *buf; | |
381 | int stream; | |
382 | ||
ee7d4767 | 383 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 BD |
384 | |
385 | for (stream = 0; stream < 2; stream++) { | |
386 | substream = pcm->streams[stream].substream; | |
387 | if (!substream) | |
388 | continue; | |
389 | ||
390 | buf = &substream->dma_buffer; | |
391 | if (!buf->area) | |
392 | continue; | |
393 | ||
394 | dma_free_writecombine(pcm->card->dev, buf->bytes, | |
395 | buf->area, buf->addr); | |
396 | buf->area = NULL; | |
397 | } | |
398 | } | |
399 | ||
c3f2028b | 400 | static u64 dma_mask = DMA_BIT_MASK(32); |
c0f41bb1 | 401 | |
552d1ef6 | 402 | static int dma_new(struct snd_soc_pcm_runtime *rtd) |
c0f41bb1 | 403 | { |
552d1ef6 LG |
404 | struct snd_card *card = rtd->card->snd_card; |
405 | struct snd_soc_dai *dai = rtd->cpu_dai; | |
406 | struct snd_pcm *pcm = rtd->pcm; | |
c0f41bb1 BD |
407 | int ret = 0; |
408 | ||
ee7d4767 | 409 | pr_debug("Entered %s\n", __func__); |
c0f41bb1 BD |
410 | |
411 | if (!card->dev->dma_mask) | |
c3f2028b | 412 | card->dev->dma_mask = &dma_mask; |
c0f41bb1 BD |
413 | if (!card->dev->coherent_dma_mask) |
414 | card->dev->coherent_dma_mask = 0xffffffff; | |
415 | ||
f0fba2ad | 416 | if (dai->driver->playback.channels_min) { |
c3f2028b | 417 | ret = preallocate_dma_buffer(pcm, |
c0f41bb1 BD |
418 | SNDRV_PCM_STREAM_PLAYBACK); |
419 | if (ret) | |
420 | goto out; | |
421 | } | |
422 | ||
f0fba2ad | 423 | if (dai->driver->capture.channels_min) { |
c3f2028b | 424 | ret = preallocate_dma_buffer(pcm, |
c0f41bb1 BD |
425 | SNDRV_PCM_STREAM_CAPTURE); |
426 | if (ret) | |
427 | goto out; | |
428 | } | |
4b640cf3 | 429 | out: |
c0f41bb1 BD |
430 | return ret; |
431 | } | |
432 | ||
c3f2028b JB |
433 | static struct snd_soc_platform_driver samsung_asoc_platform = { |
434 | .ops = &dma_ops, | |
435 | .pcm_new = dma_new, | |
436 | .pcm_free = dma_free_dma_buffers, | |
c0f41bb1 | 437 | }; |
c0f41bb1 | 438 | |
c3f2028b | 439 | static int __devinit samsung_asoc_platform_probe(struct platform_device *pdev) |
958e792c | 440 | { |
c3f2028b | 441 | return snd_soc_register_platform(&pdev->dev, &samsung_asoc_platform); |
958e792c | 442 | } |
958e792c | 443 | |
c3f2028b | 444 | static int __devexit samsung_asoc_platform_remove(struct platform_device *pdev) |
958e792c | 445 | { |
f0fba2ad LG |
446 | snd_soc_unregister_platform(&pdev->dev); |
447 | return 0; | |
448 | } | |
449 | ||
c3f2028b | 450 | static struct platform_driver asoc_dma_driver = { |
f0fba2ad | 451 | .driver = { |
58bb4072 | 452 | .name = "samsung-audio", |
f0fba2ad LG |
453 | .owner = THIS_MODULE, |
454 | }, | |
455 | ||
c3f2028b JB |
456 | .probe = samsung_asoc_platform_probe, |
457 | .remove = __devexit_p(samsung_asoc_platform_remove), | |
f0fba2ad LG |
458 | }; |
459 | ||
c3f2028b | 460 | static int __init samsung_asoc_init(void) |
f0fba2ad | 461 | { |
c3f2028b | 462 | return platform_driver_register(&asoc_dma_driver); |
f0fba2ad | 463 | } |
c3f2028b | 464 | module_init(samsung_asoc_init); |
f0fba2ad | 465 | |
c3f2028b | 466 | static void __exit samsung_asoc_exit(void) |
f0fba2ad | 467 | { |
c3f2028b | 468 | platform_driver_unregister(&asoc_dma_driver); |
958e792c | 469 | } |
c3f2028b | 470 | module_exit(samsung_asoc_exit); |
958e792c | 471 | |
c0f41bb1 | 472 | MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); |
c3f2028b | 473 | MODULE_DESCRIPTION("Samsung ASoC DMA Driver"); |
c0f41bb1 | 474 | MODULE_LICENSE("GPL"); |
58bb4072 | 475 | MODULE_ALIAS("platform:samsung-audio"); |