Commit | Line | Data |
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4b166da9 DG |
1 | /* |
2 | * ALSA PCM interface for the Stetch s6000 family | |
3 | * | |
4 | * Author: Daniel Gloeckner, <dg@emlix.com> | |
5 | * Copyright: (C) 2009 emlix GmbH <info@emlix.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/dma-mapping.h> | |
17 | #include <linux/interrupt.h> | |
18 | ||
19 | #include <sound/core.h> | |
20 | #include <sound/pcm.h> | |
21 | #include <sound/pcm_params.h> | |
22 | #include <sound/soc.h> | |
23 | ||
24 | #include <asm/dma.h> | |
25 | #include <variant/dmac.h> | |
26 | ||
27 | #include "s6000-pcm.h" | |
28 | ||
29 | #define S6_PCM_PREALLOCATE_SIZE (96 * 1024) | |
30 | #define S6_PCM_PREALLOCATE_MAX (2048 * 1024) | |
31 | ||
32 | static struct snd_pcm_hardware s6000_pcm_hardware = { | |
33 | .info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER | | |
34 | SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | | |
35 | SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_JOINT_DUPLEX), | |
36 | .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE), | |
37 | .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_5512 | \ | |
38 | SNDRV_PCM_RATE_8000_192000), | |
39 | .rate_min = 0, | |
40 | .rate_max = 1562500, | |
41 | .channels_min = 2, | |
42 | .channels_max = 8, | |
43 | .buffer_bytes_max = 0x7ffffff0, | |
44 | .period_bytes_min = 16, | |
45 | .period_bytes_max = 0xfffff0, | |
46 | .periods_min = 2, | |
47 | .periods_max = 1024, /* no limit */ | |
48 | .fifo_size = 0, | |
49 | }; | |
50 | ||
51 | struct s6000_runtime_data { | |
52 | spinlock_t lock; | |
53 | int period; /* current DMA period */ | |
54 | }; | |
55 | ||
56 | static void s6000_pcm_enqueue_dma(struct snd_pcm_substream *substream) | |
57 | { | |
58 | struct snd_pcm_runtime *runtime = substream->runtime; | |
59 | struct s6000_runtime_data *prtd = runtime->private_data; | |
60 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b | 61 | struct s6000_pcm_dma_params *par; |
4b166da9 DG |
62 | int channel; |
63 | unsigned int period_size; | |
64 | unsigned int dma_offset; | |
65 | dma_addr_t dma_pos; | |
66 | dma_addr_t src, dst; | |
67 | ||
5f712b2b DM |
68 | par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
69 | ||
4b166da9 DG |
70 | period_size = snd_pcm_lib_period_bytes(substream); |
71 | dma_offset = prtd->period * period_size; | |
72 | dma_pos = runtime->dma_addr + dma_offset; | |
73 | ||
74 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
75 | src = dma_pos; | |
76 | dst = par->sif_out; | |
77 | channel = par->dma_out; | |
78 | } else { | |
79 | src = par->sif_in; | |
80 | dst = dma_pos; | |
81 | channel = par->dma_in; | |
82 | } | |
83 | ||
84 | if (!s6dmac_channel_enabled(DMA_MASK_DMAC(channel), | |
85 | DMA_INDEX_CHNL(channel))) | |
86 | return; | |
87 | ||
88 | if (s6dmac_fifo_full(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel))) { | |
89 | printk(KERN_ERR "s6000-pcm: fifo full\n"); | |
90 | return; | |
91 | } | |
92 | ||
93 | BUG_ON(period_size & 15); | |
94 | s6dmac_put_fifo(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel), | |
95 | src, dst, period_size); | |
96 | ||
97 | prtd->period++; | |
98 | if (unlikely(prtd->period >= runtime->periods)) | |
99 | prtd->period = 0; | |
100 | } | |
101 | ||
102 | static irqreturn_t s6000_pcm_irq(int irq, void *data) | |
103 | { | |
104 | struct snd_pcm *pcm = data; | |
105 | struct snd_soc_pcm_runtime *runtime = pcm->private_data; | |
5f712b2b DM |
106 | struct s6000_pcm_dma_params *params = |
107 | snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); | |
4b166da9 DG |
108 | struct s6000_runtime_data *prtd; |
109 | unsigned int has_xrun; | |
110 | int i, ret = IRQ_NONE; | |
111 | u32 channel[2] = { | |
112 | [SNDRV_PCM_STREAM_PLAYBACK] = params->dma_out, | |
113 | [SNDRV_PCM_STREAM_CAPTURE] = params->dma_in | |
114 | }; | |
115 | ||
116 | has_xrun = params->check_xrun(runtime->dai->cpu_dai); | |
117 | ||
118 | for (i = 0; i < ARRAY_SIZE(channel); ++i) { | |
119 | struct snd_pcm_substream *substream = pcm->streams[i].substream; | |
120 | unsigned int pending; | |
121 | ||
122 | if (!channel[i]) | |
123 | continue; | |
124 | ||
125 | if (unlikely(has_xrun & (1 << i)) && | |
126 | substream->runtime && | |
127 | snd_pcm_running(substream)) { | |
128 | dev_dbg(pcm->dev, "xrun\n"); | |
129 | snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN); | |
130 | ret = IRQ_HANDLED; | |
131 | } | |
132 | ||
133 | pending = s6dmac_int_sources(DMA_MASK_DMAC(channel[i]), | |
134 | DMA_INDEX_CHNL(channel[i])); | |
135 | ||
136 | if (pending & 1) { | |
137 | ret = IRQ_HANDLED; | |
138 | if (likely(substream->runtime && | |
139 | snd_pcm_running(substream))) { | |
140 | snd_pcm_period_elapsed(substream); | |
141 | dev_dbg(pcm->dev, "period elapsed %x %x\n", | |
142 | s6dmac_cur_src(DMA_MASK_DMAC(channel[i]), | |
143 | DMA_INDEX_CHNL(channel[i])), | |
144 | s6dmac_cur_dst(DMA_MASK_DMAC(channel[i]), | |
145 | DMA_INDEX_CHNL(channel[i]))); | |
146 | prtd = substream->runtime->private_data; | |
147 | spin_lock(&prtd->lock); | |
148 | s6000_pcm_enqueue_dma(substream); | |
149 | spin_unlock(&prtd->lock); | |
150 | } | |
151 | } | |
152 | ||
153 | if (unlikely(pending & ~7)) { | |
154 | if (pending & (1 << 3)) | |
155 | printk(KERN_WARNING | |
156 | "s6000-pcm: DMA %x Underflow\n", | |
157 | channel[i]); | |
158 | if (pending & (1 << 4)) | |
159 | printk(KERN_WARNING | |
160 | "s6000-pcm: DMA %x Overflow\n", | |
161 | channel[i]); | |
162 | if (pending & 0x1e0) | |
163 | printk(KERN_WARNING | |
164 | "s6000-pcm: DMA %x Master Error " | |
165 | "(mask %x)\n", | |
166 | channel[i], pending >> 5); | |
167 | ||
168 | } | |
169 | } | |
170 | ||
171 | return ret; | |
172 | } | |
173 | ||
174 | static int s6000_pcm_start(struct snd_pcm_substream *substream) | |
175 | { | |
176 | struct s6000_runtime_data *prtd = substream->runtime->private_data; | |
177 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b | 178 | struct s6000_pcm_dma_params *par; |
4b166da9 DG |
179 | unsigned long flags; |
180 | int srcinc; | |
181 | u32 dma; | |
182 | ||
5f712b2b DM |
183 | par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
184 | ||
4b166da9 DG |
185 | spin_lock_irqsave(&prtd->lock, flags); |
186 | ||
187 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { | |
188 | srcinc = 1; | |
189 | dma = par->dma_out; | |
190 | } else { | |
191 | srcinc = 0; | |
192 | dma = par->dma_in; | |
193 | } | |
194 | s6dmac_enable_chan(DMA_MASK_DMAC(dma), DMA_INDEX_CHNL(dma), | |
195 | 1 /* priority 1 (0 is max) */, | |
196 | 0 /* peripheral requests w/o xfer length mode */, | |
197 | srcinc /* source address increment */, | |
198 | srcinc^1 /* destination address increment */, | |
199 | 0 /* chunksize 0 (skip impossible on this dma) */, | |
200 | 0 /* source skip after chunk (impossible) */, | |
201 | 0 /* destination skip after chunk (impossible) */, | |
202 | 4 /* 16 byte burst size */, | |
203 | -1 /* don't conserve bandwidth */, | |
af901ca1 | 204 | 0 /* low watermark irq descriptor threshold */, |
4b166da9 DG |
205 | 0 /* disable hardware timestamps */, |
206 | 1 /* enable channel */); | |
207 | ||
208 | s6000_pcm_enqueue_dma(substream); | |
209 | s6000_pcm_enqueue_dma(substream); | |
210 | ||
211 | spin_unlock_irqrestore(&prtd->lock, flags); | |
212 | ||
213 | return 0; | |
214 | } | |
215 | ||
216 | static int s6000_pcm_stop(struct snd_pcm_substream *substream) | |
217 | { | |
218 | struct s6000_runtime_data *prtd = substream->runtime->private_data; | |
219 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b | 220 | struct s6000_pcm_dma_params *par; |
4b166da9 DG |
221 | unsigned long flags; |
222 | u32 channel; | |
223 | ||
5f712b2b DM |
224 | par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
225 | ||
4b166da9 DG |
226 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
227 | channel = par->dma_out; | |
228 | else | |
229 | channel = par->dma_in; | |
230 | ||
231 | s6dmac_set_terminal_count(DMA_MASK_DMAC(channel), | |
232 | DMA_INDEX_CHNL(channel), 0); | |
233 | ||
234 | spin_lock_irqsave(&prtd->lock, flags); | |
235 | ||
236 | s6dmac_disable_chan(DMA_MASK_DMAC(channel), DMA_INDEX_CHNL(channel)); | |
237 | ||
238 | spin_unlock_irqrestore(&prtd->lock, flags); | |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | static int s6000_pcm_trigger(struct snd_pcm_substream *substream, int cmd) | |
244 | { | |
245 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b | 246 | struct s6000_pcm_dma_params *par; |
4b166da9 DG |
247 | int ret; |
248 | ||
5f712b2b DM |
249 | par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
250 | ||
4b166da9 DG |
251 | ret = par->trigger(substream, cmd, 0); |
252 | if (ret < 0) | |
253 | return ret; | |
254 | ||
255 | switch (cmd) { | |
256 | case SNDRV_PCM_TRIGGER_START: | |
257 | case SNDRV_PCM_TRIGGER_RESUME: | |
258 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
259 | ret = s6000_pcm_start(substream); | |
260 | break; | |
261 | case SNDRV_PCM_TRIGGER_STOP: | |
262 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
263 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
264 | ret = s6000_pcm_stop(substream); | |
265 | break; | |
266 | default: | |
267 | ret = -EINVAL; | |
268 | } | |
269 | if (ret < 0) | |
270 | return ret; | |
271 | ||
272 | return par->trigger(substream, cmd, 1); | |
273 | } | |
274 | ||
275 | static int s6000_pcm_prepare(struct snd_pcm_substream *substream) | |
276 | { | |
277 | struct s6000_runtime_data *prtd = substream->runtime->private_data; | |
278 | ||
279 | prtd->period = 0; | |
280 | ||
281 | return 0; | |
282 | } | |
283 | ||
284 | static snd_pcm_uframes_t s6000_pcm_pointer(struct snd_pcm_substream *substream) | |
285 | { | |
286 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b | 287 | struct s6000_pcm_dma_params *par; |
4b166da9 DG |
288 | struct snd_pcm_runtime *runtime = substream->runtime; |
289 | struct s6000_runtime_data *prtd = runtime->private_data; | |
290 | unsigned long flags; | |
291 | unsigned int offset; | |
292 | dma_addr_t count; | |
293 | ||
5f712b2b DM |
294 | par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
295 | ||
4b166da9 DG |
296 | spin_lock_irqsave(&prtd->lock, flags); |
297 | ||
298 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) | |
299 | count = s6dmac_cur_src(DMA_MASK_DMAC(par->dma_out), | |
300 | DMA_INDEX_CHNL(par->dma_out)); | |
301 | else | |
302 | count = s6dmac_cur_dst(DMA_MASK_DMAC(par->dma_in), | |
303 | DMA_INDEX_CHNL(par->dma_in)); | |
304 | ||
305 | count -= runtime->dma_addr; | |
306 | ||
307 | spin_unlock_irqrestore(&prtd->lock, flags); | |
308 | ||
309 | offset = bytes_to_frames(runtime, count); | |
310 | if (unlikely(offset >= runtime->buffer_size)) | |
311 | offset = 0; | |
312 | ||
313 | return offset; | |
314 | } | |
315 | ||
316 | static int s6000_pcm_open(struct snd_pcm_substream *substream) | |
317 | { | |
318 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b | 319 | struct s6000_pcm_dma_params *par; |
4b166da9 DG |
320 | struct snd_pcm_runtime *runtime = substream->runtime; |
321 | struct s6000_runtime_data *prtd; | |
322 | int ret; | |
323 | ||
5f712b2b | 324 | par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
4b166da9 DG |
325 | snd_soc_set_runtime_hwparams(substream, &s6000_pcm_hardware); |
326 | ||
327 | ret = snd_pcm_hw_constraint_step(runtime, 0, | |
328 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 16); | |
329 | if (ret < 0) | |
330 | return ret; | |
331 | ret = snd_pcm_hw_constraint_step(runtime, 0, | |
332 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16); | |
333 | if (ret < 0) | |
334 | return ret; | |
335 | ret = snd_pcm_hw_constraint_integer(runtime, | |
336 | SNDRV_PCM_HW_PARAM_PERIODS); | |
337 | if (ret < 0) | |
338 | return ret; | |
339 | ||
340 | if (par->same_rate) { | |
341 | int rate; | |
342 | spin_lock(&par->lock); /* needed? */ | |
343 | rate = par->rate; | |
344 | spin_unlock(&par->lock); | |
345 | if (rate != -1) { | |
346 | ret = snd_pcm_hw_constraint_minmax(runtime, | |
347 | SNDRV_PCM_HW_PARAM_RATE, | |
348 | rate, rate); | |
349 | if (ret < 0) | |
350 | return ret; | |
351 | } | |
352 | } | |
353 | ||
354 | prtd = kzalloc(sizeof(struct s6000_runtime_data), GFP_KERNEL); | |
355 | if (prtd == NULL) | |
356 | return -ENOMEM; | |
357 | ||
358 | spin_lock_init(&prtd->lock); | |
359 | ||
360 | runtime->private_data = prtd; | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | static int s6000_pcm_close(struct snd_pcm_substream *substream) | |
366 | { | |
367 | struct snd_pcm_runtime *runtime = substream->runtime; | |
368 | struct s6000_runtime_data *prtd = runtime->private_data; | |
369 | ||
370 | kfree(prtd); | |
371 | ||
372 | return 0; | |
373 | } | |
374 | ||
375 | static int s6000_pcm_hw_params(struct snd_pcm_substream *substream, | |
376 | struct snd_pcm_hw_params *hw_params) | |
377 | { | |
378 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b | 379 | struct s6000_pcm_dma_params *par; |
4b166da9 DG |
380 | int ret; |
381 | ret = snd_pcm_lib_malloc_pages(substream, | |
382 | params_buffer_bytes(hw_params)); | |
383 | if (ret < 0) { | |
384 | printk(KERN_WARNING "s6000-pcm: allocation of memory failed\n"); | |
385 | return ret; | |
386 | } | |
387 | ||
5f712b2b DM |
388 | par = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
389 | ||
4b166da9 DG |
390 | if (par->same_rate) { |
391 | spin_lock(&par->lock); | |
392 | if (par->rate == -1 || | |
393 | !(par->in_use & ~(1 << substream->stream))) { | |
394 | par->rate = params_rate(hw_params); | |
395 | par->in_use |= 1 << substream->stream; | |
396 | } else if (params_rate(hw_params) != par->rate) { | |
397 | snd_pcm_lib_free_pages(substream); | |
398 | par->in_use &= ~(1 << substream->stream); | |
399 | ret = -EBUSY; | |
400 | } | |
401 | spin_unlock(&par->lock); | |
402 | } | |
403 | return ret; | |
404 | } | |
405 | ||
406 | static int s6000_pcm_hw_free(struct snd_pcm_substream *substream) | |
407 | { | |
408 | struct snd_soc_pcm_runtime *soc_runtime = substream->private_data; | |
5f712b2b DM |
409 | struct s6000_pcm_dma_params *par = |
410 | snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); | |
4b166da9 DG |
411 | |
412 | spin_lock(&par->lock); | |
413 | par->in_use &= ~(1 << substream->stream); | |
414 | if (!par->in_use) | |
415 | par->rate = -1; | |
416 | spin_unlock(&par->lock); | |
417 | ||
418 | return snd_pcm_lib_free_pages(substream); | |
419 | } | |
420 | ||
421 | static struct snd_pcm_ops s6000_pcm_ops = { | |
422 | .open = s6000_pcm_open, | |
423 | .close = s6000_pcm_close, | |
424 | .ioctl = snd_pcm_lib_ioctl, | |
425 | .hw_params = s6000_pcm_hw_params, | |
426 | .hw_free = s6000_pcm_hw_free, | |
427 | .trigger = s6000_pcm_trigger, | |
428 | .prepare = s6000_pcm_prepare, | |
429 | .pointer = s6000_pcm_pointer, | |
430 | }; | |
431 | ||
432 | static void s6000_pcm_free(struct snd_pcm *pcm) | |
433 | { | |
434 | struct snd_soc_pcm_runtime *runtime = pcm->private_data; | |
5f712b2b DM |
435 | struct s6000_pcm_dma_params *params = |
436 | snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); | |
4b166da9 DG |
437 | |
438 | free_irq(params->irq, pcm); | |
439 | snd_pcm_lib_preallocate_free_for_all(pcm); | |
440 | } | |
441 | ||
f9ede4ec | 442 | static u64 s6000_pcm_dmamask = DMA_BIT_MASK(32); |
4b166da9 DG |
443 | |
444 | static int s6000_pcm_new(struct snd_card *card, | |
445 | struct snd_soc_dai *dai, struct snd_pcm *pcm) | |
446 | { | |
447 | struct snd_soc_pcm_runtime *runtime = pcm->private_data; | |
5f712b2b | 448 | struct s6000_pcm_dma_params *params; |
4b166da9 DG |
449 | int res; |
450 | ||
5f712b2b DM |
451 | params = snd_soc_dai_get_dma_data(soc_runtime->dai->cpu_dai, substream); |
452 | ||
4b166da9 DG |
453 | if (!card->dev->dma_mask) |
454 | card->dev->dma_mask = &s6000_pcm_dmamask; | |
455 | if (!card->dev->coherent_dma_mask) | |
f9ede4ec | 456 | card->dev->coherent_dma_mask = DMA_BIT_MASK(32); |
4b166da9 DG |
457 | |
458 | if (params->dma_in) { | |
459 | s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_in), | |
460 | DMA_INDEX_CHNL(params->dma_in)); | |
461 | s6dmac_int_sources(DMA_MASK_DMAC(params->dma_in), | |
462 | DMA_INDEX_CHNL(params->dma_in)); | |
463 | } | |
464 | ||
465 | if (params->dma_out) { | |
466 | s6dmac_disable_chan(DMA_MASK_DMAC(params->dma_out), | |
467 | DMA_INDEX_CHNL(params->dma_out)); | |
468 | s6dmac_int_sources(DMA_MASK_DMAC(params->dma_out), | |
469 | DMA_INDEX_CHNL(params->dma_out)); | |
470 | } | |
471 | ||
472 | res = request_irq(params->irq, s6000_pcm_irq, IRQF_SHARED, | |
473 | s6000_soc_platform.name, pcm); | |
474 | if (res) { | |
475 | printk(KERN_ERR "s6000-pcm couldn't get IRQ\n"); | |
476 | return res; | |
477 | } | |
478 | ||
479 | res = snd_pcm_lib_preallocate_pages_for_all(pcm, | |
480 | SNDRV_DMA_TYPE_DEV, | |
481 | card->dev, | |
482 | S6_PCM_PREALLOCATE_SIZE, | |
483 | S6_PCM_PREALLOCATE_MAX); | |
484 | if (res) | |
485 | printk(KERN_WARNING "s6000-pcm: preallocation failed\n"); | |
486 | ||
487 | spin_lock_init(¶ms->lock); | |
488 | params->in_use = 0; | |
489 | params->rate = -1; | |
490 | return 0; | |
491 | } | |
492 | ||
493 | struct snd_soc_platform s6000_soc_platform = { | |
494 | .name = "s6000-audio", | |
495 | .pcm_ops = &s6000_pcm_ops, | |
496 | .pcm_new = s6000_pcm_new, | |
497 | .pcm_free = s6000_pcm_free, | |
498 | }; | |
499 | EXPORT_SYMBOL_GPL(s6000_soc_platform); | |
500 | ||
501 | static int __init s6000_pcm_init(void) | |
502 | { | |
503 | return snd_soc_register_platform(&s6000_soc_platform); | |
504 | } | |
505 | module_init(s6000_pcm_init); | |
506 | ||
507 | static void __exit s6000_pcm_exit(void) | |
508 | { | |
509 | snd_soc_unregister_platform(&s6000_soc_platform); | |
510 | } | |
511 | module_exit(s6000_pcm_exit); | |
512 | ||
513 | MODULE_AUTHOR("Daniel Gloeckner"); | |
514 | MODULE_DESCRIPTION("Stretch s6000 family PCM DMA module"); | |
515 | MODULE_LICENSE("GPL"); |