Commit | Line | Data |
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6c742509 SG |
1 | /* |
2 | * atmel-pcm.c -- ALSA PCM interface for the Atmel atmel SoC. | |
9aaca968 | 3 | * |
6c742509 SG |
4 | * Copyright (C) 2005 SAN People |
5 | * Copyright (C) 2008 Atmel | |
6 | * | |
7 | * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com> | |
8 | * | |
9 | * Based on at91-pcm. by: | |
10 | * Frank Mandarino <fmandarino@endrelia.com> | |
11 | * Copyright 2006 Endrelia Technologies Inc. | |
12 | * | |
13 | * Based on pxa2xx-pcm.c by: | |
14 | * | |
15 | * Author: Nicolas Pitre | |
16 | * Created: Nov 30, 2004 | |
17 | * Copyright: (C) 2004 MontaVista Software, Inc. | |
9aaca968 GW |
18 | * |
19 | * This program is free software; you can redistribute it and/or modify | |
6c742509 SG |
20 | * it under the terms of the GNU General Public License as published by |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
9aaca968 | 23 | * |
6c742509 SG |
24 | * This program is distributed in the hope that it will be useful, |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
28 | * | |
29 | * You should have received a copy of the GNU General Public License | |
30 | * along with this program; if not, write to the Free Software | |
31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
9aaca968 GW |
32 | */ |
33 | ||
34 | #include <linux/module.h> | |
35 | #include <linux/init.h> | |
36 | #include <linux/platform_device.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/dma-mapping.h> | |
39 | #include <linux/atmel_pdc.h> | |
6c742509 | 40 | #include <linux/atmel-ssc.h> |
9aaca968 GW |
41 | |
42 | #include <sound/core.h> | |
43 | #include <sound/pcm.h> | |
44 | #include <sound/pcm_params.h> | |
45 | #include <sound/soc.h> | |
46 | ||
6c742509 | 47 | #include "atmel-pcm.h" |
9aaca968 GW |
48 | |
49 | ||
50 | /*--------------------------------------------------------------------------*\ | |
51 | * Hardware definition | |
52 | \*--------------------------------------------------------------------------*/ | |
53 | /* TODO: These values were taken from the AT91 platform driver, check | |
54 | * them against real values for AT32 | |
55 | */ | |
6c742509 SG |
56 | static const struct snd_pcm_hardware atmel_pcm_hardware = { |
57 | .info = SNDRV_PCM_INFO_MMAP | | |
58 | SNDRV_PCM_INFO_MMAP_VALID | | |
59 | SNDRV_PCM_INFO_INTERLEAVED | | |
60 | SNDRV_PCM_INFO_PAUSE, | |
61 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
62 | .period_bytes_min = 32, | |
63 | .period_bytes_max = 8192, | |
64 | .periods_min = 2, | |
65 | .periods_max = 1024, | |
66 | .buffer_bytes_max = 32 * 1024, | |
9aaca968 GW |
67 | }; |
68 | ||
69 | ||
9aaca968 GW |
70 | /*--------------------------------------------------------------------------*\ |
71 | * Data types | |
72 | \*--------------------------------------------------------------------------*/ | |
6c742509 SG |
73 | struct atmel_runtime_data { |
74 | struct atmel_pcm_dma_params *params; | |
75 | dma_addr_t dma_buffer; /* physical address of dma buffer */ | |
76 | dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */ | |
9aaca968 GW |
77 | size_t period_size; |
78 | ||
6c742509 SG |
79 | dma_addr_t period_ptr; /* physical address of next period */ |
80 | int periods; /* period index of period_ptr */ | |
9aaca968 | 81 | |
6c742509 | 82 | /* PDC register save */ |
9aaca968 GW |
83 | u32 pdc_xpr_save; |
84 | u32 pdc_xcr_save; | |
85 | u32 pdc_xnpr_save; | |
86 | u32 pdc_xncr_save; | |
87 | }; | |
88 | ||
89 | ||
9aaca968 GW |
90 | /*--------------------------------------------------------------------------*\ |
91 | * Helper functions | |
92 | \*--------------------------------------------------------------------------*/ | |
6c742509 SG |
93 | static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, |
94 | int stream) | |
9aaca968 GW |
95 | { |
96 | struct snd_pcm_substream *substream = pcm->streams[stream].substream; | |
6c742509 SG |
97 | struct snd_dma_buffer *buf = &substream->dma_buffer; |
98 | size_t size = atmel_pcm_hardware.buffer_bytes_max; | |
99 | ||
100 | buf->dev.type = SNDRV_DMA_TYPE_DEV; | |
101 | buf->dev.dev = pcm->card->dev; | |
102 | buf->private_data = NULL; | |
103 | buf->area = dma_alloc_coherent(pcm->card->dev, size, | |
104 | &buf->addr, GFP_KERNEL); | |
105 | pr_debug("atmel-pcm:" | |
106 | "preallocate_dma_buffer: area=%p, addr=%p, size=%d\n", | |
107 | (void *) buf->area, | |
108 | (void *) buf->addr, | |
109 | size); | |
110 | ||
111 | if (!buf->area) | |
9aaca968 GW |
112 | return -ENOMEM; |
113 | ||
6c742509 | 114 | buf->bytes = size; |
9aaca968 GW |
115 | return 0; |
116 | } | |
9aaca968 GW |
117 | /*--------------------------------------------------------------------------*\ |
118 | * ISR | |
119 | \*--------------------------------------------------------------------------*/ | |
6c742509 SG |
120 | static void atmel_pcm_dma_irq(u32 ssc_sr, |
121 | struct snd_pcm_substream *substream) | |
9aaca968 | 122 | { |
6c742509 SG |
123 | struct atmel_runtime_data *prtd = substream->runtime->private_data; |
124 | struct atmel_pcm_dma_params *params = prtd->params; | |
9aaca968 GW |
125 | static int count; |
126 | ||
127 | count++; | |
6c742509 | 128 | |
9aaca968 | 129 | if (ssc_sr & params->mask->ssc_endbuf) { |
6c742509 SG |
130 | pr_warning("atmel-pcm: buffer %s on %s" |
131 | " (SSC_SR=%#x, count=%d)\n", | |
132 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK | |
133 | ? "underrun" : "overrun", | |
134 | params->name, ssc_sr, count); | |
9aaca968 GW |
135 | |
136 | /* re-start the PDC */ | |
137 | ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, | |
138 | params->mask->pdc_disable); | |
139 | prtd->period_ptr += prtd->period_size; | |
140 | if (prtd->period_ptr >= prtd->dma_buffer_end) | |
141 | prtd->period_ptr = prtd->dma_buffer; | |
142 | ||
9aaca968 GW |
143 | ssc_writex(params->ssc->regs, params->pdc->xpr, |
144 | prtd->period_ptr); | |
145 | ssc_writex(params->ssc->regs, params->pdc->xcr, | |
146 | prtd->period_size / params->pdc_xfer_size); | |
147 | ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, | |
148 | params->mask->pdc_enable); | |
149 | } | |
150 | ||
9aaca968 GW |
151 | if (ssc_sr & params->mask->ssc_endx) { |
152 | /* Load the PDC next pointer and counter registers */ | |
153 | prtd->period_ptr += prtd->period_size; | |
154 | if (prtd->period_ptr >= prtd->dma_buffer_end) | |
155 | prtd->period_ptr = prtd->dma_buffer; | |
6c742509 | 156 | |
9aaca968 GW |
157 | ssc_writex(params->ssc->regs, params->pdc->xnpr, |
158 | prtd->period_ptr); | |
159 | ssc_writex(params->ssc->regs, params->pdc->xncr, | |
160 | prtd->period_size / params->pdc_xfer_size); | |
161 | } | |
162 | ||
9aaca968 GW |
163 | snd_pcm_period_elapsed(substream); |
164 | } | |
165 | ||
166 | ||
9aaca968 GW |
167 | /*--------------------------------------------------------------------------*\ |
168 | * PCM operations | |
169 | \*--------------------------------------------------------------------------*/ | |
6c742509 SG |
170 | static int atmel_pcm_hw_params(struct snd_pcm_substream *substream, |
171 | struct snd_pcm_hw_params *params) | |
9aaca968 GW |
172 | { |
173 | struct snd_pcm_runtime *runtime = substream->runtime; | |
6c742509 | 174 | struct atmel_runtime_data *prtd = runtime->private_data; |
9aaca968 GW |
175 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
176 | ||
177 | /* this may get called several times by oss emulation | |
6c742509 SG |
178 | * with different params */ |
179 | ||
9aaca968 GW |
180 | snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer); |
181 | runtime->dma_bytes = params_buffer_bytes(params); | |
182 | ||
183 | prtd->params = rtd->dai->cpu_dai->dma_data; | |
6c742509 | 184 | prtd->params->dma_intr_handler = atmel_pcm_dma_irq; |
9aaca968 GW |
185 | |
186 | prtd->dma_buffer = runtime->dma_addr; | |
187 | prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes; | |
188 | prtd->period_size = params_period_bytes(params); | |
189 | ||
6c742509 SG |
190 | pr_debug("atmel-pcm: " |
191 | "hw_params: DMA for %s initialized " | |
192 | "(dma_bytes=%u, period_size=%u)\n", | |
193 | prtd->params->name, | |
194 | runtime->dma_bytes, | |
195 | prtd->period_size); | |
9aaca968 GW |
196 | return 0; |
197 | } | |
198 | ||
6c742509 | 199 | static int atmel_pcm_hw_free(struct snd_pcm_substream *substream) |
9aaca968 | 200 | { |
6c742509 SG |
201 | struct atmel_runtime_data *prtd = substream->runtime->private_data; |
202 | struct atmel_pcm_dma_params *params = prtd->params; | |
9aaca968 GW |
203 | |
204 | if (params != NULL) { | |
205 | ssc_writex(params->ssc->regs, SSC_PDC_PTCR, | |
206 | params->mask->pdc_disable); | |
207 | prtd->params->dma_intr_handler = NULL; | |
208 | } | |
209 | ||
210 | return 0; | |
211 | } | |
212 | ||
6c742509 | 213 | static int atmel_pcm_prepare(struct snd_pcm_substream *substream) |
9aaca968 | 214 | { |
6c742509 SG |
215 | struct atmel_runtime_data *prtd = substream->runtime->private_data; |
216 | struct atmel_pcm_dma_params *params = prtd->params; | |
9aaca968 GW |
217 | |
218 | ssc_writex(params->ssc->regs, SSC_IDR, | |
219 | params->mask->ssc_endx | params->mask->ssc_endbuf); | |
220 | ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, | |
221 | params->mask->pdc_disable); | |
9aaca968 GW |
222 | return 0; |
223 | } | |
224 | ||
6c742509 SG |
225 | static int atmel_pcm_trigger(struct snd_pcm_substream *substream, |
226 | int cmd) | |
9aaca968 GW |
227 | { |
228 | struct snd_pcm_runtime *rtd = substream->runtime; | |
6c742509 SG |
229 | struct atmel_runtime_data *prtd = rtd->private_data; |
230 | struct atmel_pcm_dma_params *params = prtd->params; | |
9aaca968 GW |
231 | int ret = 0; |
232 | ||
6c742509 SG |
233 | pr_debug("atmel-pcm:buffer_size = %ld," |
234 | "dma_area = %p, dma_bytes = %u\n", | |
235 | rtd->buffer_size, rtd->dma_area, rtd->dma_bytes); | |
9aaca968 GW |
236 | |
237 | switch (cmd) { | |
238 | case SNDRV_PCM_TRIGGER_START: | |
239 | prtd->period_ptr = prtd->dma_buffer; | |
240 | ||
241 | ssc_writex(params->ssc->regs, params->pdc->xpr, | |
242 | prtd->period_ptr); | |
243 | ssc_writex(params->ssc->regs, params->pdc->xcr, | |
244 | prtd->period_size / params->pdc_xfer_size); | |
245 | ||
246 | prtd->period_ptr += prtd->period_size; | |
247 | ssc_writex(params->ssc->regs, params->pdc->xnpr, | |
248 | prtd->period_ptr); | |
249 | ssc_writex(params->ssc->regs, params->pdc->xncr, | |
250 | prtd->period_size / params->pdc_xfer_size); | |
251 | ||
6c742509 SG |
252 | pr_debug("atmel-pcm: trigger: " |
253 | "period_ptr=%lx, xpr=%u, " | |
254 | "xcr=%u, xnpr=%u, xncr=%u\n", | |
255 | (unsigned long)prtd->period_ptr, | |
256 | ssc_readx(params->ssc->regs, params->pdc->xpr), | |
257 | ssc_readx(params->ssc->regs, params->pdc->xcr), | |
258 | ssc_readx(params->ssc->regs, params->pdc->xnpr), | |
259 | ssc_readx(params->ssc->regs, params->pdc->xncr)); | |
9aaca968 GW |
260 | |
261 | ssc_writex(params->ssc->regs, SSC_IER, | |
262 | params->mask->ssc_endx | params->mask->ssc_endbuf); | |
263 | ssc_writex(params->ssc->regs, SSC_PDC_PTCR, | |
264 | params->mask->pdc_enable); | |
265 | ||
6c742509 SG |
266 | pr_debug("sr=%u imr=%u\n", |
267 | ssc_readx(params->ssc->regs, SSC_SR), | |
268 | ssc_readx(params->ssc->regs, SSC_IER)); | |
9aaca968 GW |
269 | break; /* SNDRV_PCM_TRIGGER_START */ |
270 | ||
9aaca968 GW |
271 | case SNDRV_PCM_TRIGGER_STOP: |
272 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
273 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
274 | ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, | |
275 | params->mask->pdc_disable); | |
276 | break; | |
277 | ||
9aaca968 GW |
278 | case SNDRV_PCM_TRIGGER_RESUME: |
279 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
280 | ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR, | |
281 | params->mask->pdc_enable); | |
282 | break; | |
283 | ||
284 | default: | |
285 | ret = -EINVAL; | |
286 | } | |
287 | ||
288 | return ret; | |
289 | } | |
290 | ||
6c742509 SG |
291 | static snd_pcm_uframes_t atmel_pcm_pointer( |
292 | struct snd_pcm_substream *substream) | |
9aaca968 GW |
293 | { |
294 | struct snd_pcm_runtime *runtime = substream->runtime; | |
6c742509 SG |
295 | struct atmel_runtime_data *prtd = runtime->private_data; |
296 | struct atmel_pcm_dma_params *params = prtd->params; | |
9aaca968 GW |
297 | dma_addr_t ptr; |
298 | snd_pcm_uframes_t x; | |
299 | ||
300 | ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr); | |
301 | x = bytes_to_frames(runtime, ptr - prtd->dma_buffer); | |
302 | ||
303 | if (x == runtime->buffer_size) | |
304 | x = 0; | |
305 | ||
306 | return x; | |
307 | } | |
308 | ||
6c742509 | 309 | static int atmel_pcm_open(struct snd_pcm_substream *substream) |
9aaca968 GW |
310 | { |
311 | struct snd_pcm_runtime *runtime = substream->runtime; | |
6c742509 | 312 | struct atmel_runtime_data *prtd; |
9aaca968 GW |
313 | int ret = 0; |
314 | ||
6c742509 | 315 | snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware); |
9aaca968 GW |
316 | |
317 | /* ensure that buffer size is a multiple of period size */ | |
318 | ret = snd_pcm_hw_constraint_integer(runtime, | |
6c742509 | 319 | SNDRV_PCM_HW_PARAM_PERIODS); |
9aaca968 GW |
320 | if (ret < 0) |
321 | goto out; | |
322 | ||
6c742509 | 323 | prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL); |
9aaca968 GW |
324 | if (prtd == NULL) { |
325 | ret = -ENOMEM; | |
326 | goto out; | |
327 | } | |
328 | runtime->private_data = prtd; | |
329 | ||
6c742509 | 330 | out: |
9aaca968 GW |
331 | return ret; |
332 | } | |
333 | ||
6c742509 | 334 | static int atmel_pcm_close(struct snd_pcm_substream *substream) |
9aaca968 | 335 | { |
6c742509 | 336 | struct atmel_runtime_data *prtd = substream->runtime->private_data; |
9aaca968 GW |
337 | |
338 | kfree(prtd); | |
339 | return 0; | |
340 | } | |
341 | ||
6c742509 SG |
342 | static int atmel_pcm_mmap(struct snd_pcm_substream *substream, |
343 | struct vm_area_struct *vma) | |
9aaca968 GW |
344 | { |
345 | return remap_pfn_range(vma, vma->vm_start, | |
6c742509 SG |
346 | substream->dma_buffer.addr >> PAGE_SHIFT, |
347 | vma->vm_end - vma->vm_start, vma->vm_page_prot); | |
9aaca968 GW |
348 | } |
349 | ||
b2a19d02 | 350 | static struct snd_pcm_ops atmel_pcm_ops = { |
6c742509 SG |
351 | .open = atmel_pcm_open, |
352 | .close = atmel_pcm_close, | |
353 | .ioctl = snd_pcm_lib_ioctl, | |
354 | .hw_params = atmel_pcm_hw_params, | |
355 | .hw_free = atmel_pcm_hw_free, | |
356 | .prepare = atmel_pcm_prepare, | |
357 | .trigger = atmel_pcm_trigger, | |
358 | .pointer = atmel_pcm_pointer, | |
359 | .mmap = atmel_pcm_mmap, | |
9aaca968 GW |
360 | }; |
361 | ||
362 | ||
9aaca968 GW |
363 | /*--------------------------------------------------------------------------*\ |
364 | * ASoC platform driver | |
365 | \*--------------------------------------------------------------------------*/ | |
6c742509 | 366 | static u64 atmel_pcm_dmamask = 0xffffffff; |
9aaca968 | 367 | |
6c742509 SG |
368 | static int atmel_pcm_new(struct snd_card *card, |
369 | struct snd_soc_dai *dai, struct snd_pcm *pcm) | |
9aaca968 GW |
370 | { |
371 | int ret = 0; | |
372 | ||
373 | if (!card->dev->dma_mask) | |
6c742509 | 374 | card->dev->dma_mask = &atmel_pcm_dmamask; |
9aaca968 GW |
375 | if (!card->dev->coherent_dma_mask) |
376 | card->dev->coherent_dma_mask = 0xffffffff; | |
377 | ||
378 | if (dai->playback.channels_min) { | |
6c742509 SG |
379 | ret = atmel_pcm_preallocate_dma_buffer(pcm, |
380 | SNDRV_PCM_STREAM_PLAYBACK); | |
9aaca968 GW |
381 | if (ret) |
382 | goto out; | |
383 | } | |
384 | ||
385 | if (dai->capture.channels_min) { | |
6c742509 SG |
386 | pr_debug("at32-pcm:" |
387 | "Allocating PCM capture DMA buffer\n"); | |
388 | ret = atmel_pcm_preallocate_dma_buffer(pcm, | |
389 | SNDRV_PCM_STREAM_CAPTURE); | |
9aaca968 GW |
390 | if (ret) |
391 | goto out; | |
392 | } | |
6c742509 | 393 | out: |
9aaca968 GW |
394 | return ret; |
395 | } | |
396 | ||
6c742509 | 397 | static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm) |
9aaca968 GW |
398 | { |
399 | struct snd_pcm_substream *substream; | |
400 | struct snd_dma_buffer *buf; | |
401 | int stream; | |
402 | ||
403 | for (stream = 0; stream < 2; stream++) { | |
404 | substream = pcm->streams[stream].substream; | |
6c742509 | 405 | if (!substream) |
9aaca968 GW |
406 | continue; |
407 | ||
408 | buf = &substream->dma_buffer; | |
409 | if (!buf->area) | |
410 | continue; | |
411 | dma_free_coherent(pcm->card->dev, buf->bytes, | |
412 | buf->area, buf->addr); | |
413 | buf->area = NULL; | |
414 | } | |
415 | } | |
416 | ||
9aaca968 | 417 | #ifdef CONFIG_PM |
07c84d04 | 418 | static int atmel_pcm_suspend(struct snd_soc_dai *dai) |
9aaca968 GW |
419 | { |
420 | struct snd_pcm_runtime *runtime = dai->runtime; | |
6c742509 SG |
421 | struct atmel_runtime_data *prtd; |
422 | struct atmel_pcm_dma_params *params; | |
9aaca968 | 423 | |
6c742509 | 424 | if (!runtime) |
9aaca968 | 425 | return 0; |
6c742509 | 426 | |
9aaca968 GW |
427 | prtd = runtime->private_data; |
428 | params = prtd->params; | |
429 | ||
6c742509 SG |
430 | /* disable the PDC and save the PDC registers */ |
431 | ||
432 | ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable); | |
9aaca968 GW |
433 | |
434 | prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr); | |
435 | prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr); | |
436 | prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr); | |
437 | prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr); | |
438 | ||
439 | return 0; | |
440 | } | |
441 | ||
07c84d04 | 442 | static int atmel_pcm_resume(struct snd_soc_dai *dai) |
9aaca968 GW |
443 | { |
444 | struct snd_pcm_runtime *runtime = dai->runtime; | |
6c742509 SG |
445 | struct atmel_runtime_data *prtd; |
446 | struct atmel_pcm_dma_params *params; | |
9aaca968 | 447 | |
6c742509 | 448 | if (!runtime) |
9aaca968 | 449 | return 0; |
6c742509 | 450 | |
9aaca968 GW |
451 | prtd = runtime->private_data; |
452 | params = prtd->params; | |
453 | ||
6c742509 | 454 | /* restore the PDC registers and enable the PDC */ |
9aaca968 GW |
455 | ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save); |
456 | ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save); | |
457 | ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save); | |
458 | ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save); | |
459 | ||
6c742509 | 460 | ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable); |
9aaca968 GW |
461 | return 0; |
462 | } | |
6c742509 SG |
463 | #else |
464 | #define atmel_pcm_suspend NULL | |
465 | #define atmel_pcm_resume NULL | |
466 | #endif | |
467 | ||
468 | struct snd_soc_platform atmel_soc_platform = { | |
469 | .name = "atmel-audio", | |
470 | .pcm_ops = &atmel_pcm_ops, | |
471 | .pcm_new = atmel_pcm_new, | |
472 | .pcm_free = atmel_pcm_free_dma_buffers, | |
473 | .suspend = atmel_pcm_suspend, | |
474 | .resume = atmel_pcm_resume, | |
9aaca968 | 475 | }; |
6c742509 | 476 | EXPORT_SYMBOL_GPL(atmel_soc_platform); |
9aaca968 | 477 | |
c9b3a40f | 478 | static int __init atmel_pcm_modinit(void) |
958e792c MB |
479 | { |
480 | return snd_soc_register_platform(&atmel_soc_platform); | |
481 | } | |
482 | module_init(atmel_pcm_modinit); | |
483 | ||
471716f7 | 484 | static void __exit atmel_pcm_modexit(void) |
958e792c MB |
485 | { |
486 | snd_soc_unregister_platform(&atmel_soc_platform); | |
487 | } | |
488 | module_exit(atmel_pcm_modexit); | |
489 | ||
6c742509 SG |
490 | MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>"); |
491 | MODULE_DESCRIPTION("Atmel PCM module"); | |
9aaca968 | 492 | MODULE_LICENSE("GPL"); |