This source file includes following definitions.
- s3c_pcm_snd_txctrl
- s3c_pcm_snd_rxctrl
- s3c_pcm_trigger
- s3c_pcm_hw_params
- s3c_pcm_set_fmt
- s3c_pcm_set_clkdiv
- s3c_pcm_set_sysclk
- s3c_pcm_dai_probe
- s3c_pcm_dev_probe
- s3c_pcm_dev_remove
1
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7
8
9 #include <linux/clk.h>
10 #include <linux/io.h>
11 #include <linux/module.h>
12 #include <linux/pm_runtime.h>
13
14 #include <sound/soc.h>
15 #include <sound/pcm_params.h>
16
17 #include <linux/platform_data/asoc-s3c.h>
18
19 #include "dma.h"
20 #include "pcm.h"
21
22
23 #define S3C_PCM_CTL 0x00
24 #define S3C_PCM_CLKCTL 0x04
25 #define S3C_PCM_TXFIFO 0x08
26 #define S3C_PCM_RXFIFO 0x0C
27 #define S3C_PCM_IRQCTL 0x10
28 #define S3C_PCM_IRQSTAT 0x14
29 #define S3C_PCM_FIFOSTAT 0x18
30 #define S3C_PCM_CLRINT 0x20
31
32
33 #define S3C_PCM_CTL_TXDIPSTICK_MASK 0x3f
34 #define S3C_PCM_CTL_TXDIPSTICK_SHIFT 13
35 #define S3C_PCM_CTL_RXDIPSTICK_MASK 0x3f
36 #define S3C_PCM_CTL_RXDIPSTICK_SHIFT 7
37 #define S3C_PCM_CTL_TXDMA_EN (0x1 << 6)
38 #define S3C_PCM_CTL_RXDMA_EN (0x1 << 5)
39 #define S3C_PCM_CTL_TXMSB_AFTER_FSYNC (0x1 << 4)
40 #define S3C_PCM_CTL_RXMSB_AFTER_FSYNC (0x1 << 3)
41 #define S3C_PCM_CTL_TXFIFO_EN (0x1 << 2)
42 #define S3C_PCM_CTL_RXFIFO_EN (0x1 << 1)
43 #define S3C_PCM_CTL_ENABLE (0x1 << 0)
44
45
46 #define S3C_PCM_CLKCTL_SERCLK_EN (0x1 << 19)
47 #define S3C_PCM_CLKCTL_SERCLKSEL_PCLK (0x1 << 18)
48 #define S3C_PCM_CLKCTL_SCLKDIV_MASK 0x1ff
49 #define S3C_PCM_CLKCTL_SYNCDIV_MASK 0x1ff
50 #define S3C_PCM_CLKCTL_SCLKDIV_SHIFT 9
51 #define S3C_PCM_CLKCTL_SYNCDIV_SHIFT 0
52
53
54 #define S3C_PCM_TXFIFO_DVALID (0x1 << 16)
55 #define S3C_PCM_TXFIFO_DATA_MSK (0xffff << 0)
56
57
58 #define S3C_PCM_RXFIFO_DVALID (0x1 << 16)
59 #define S3C_PCM_RXFIFO_DATA_MSK (0xffff << 0)
60
61
62 #define S3C_PCM_IRQCTL_IRQEN (0x1 << 14)
63 #define S3C_PCM_IRQCTL_WRDEN (0x1 << 12)
64 #define S3C_PCM_IRQCTL_TXEMPTYEN (0x1 << 11)
65 #define S3C_PCM_IRQCTL_TXALMSTEMPTYEN (0x1 << 10)
66 #define S3C_PCM_IRQCTL_TXFULLEN (0x1 << 9)
67 #define S3C_PCM_IRQCTL_TXALMSTFULLEN (0x1 << 8)
68 #define S3C_PCM_IRQCTL_TXSTARVEN (0x1 << 7)
69 #define S3C_PCM_IRQCTL_TXERROVRFLEN (0x1 << 6)
70 #define S3C_PCM_IRQCTL_RXEMPTEN (0x1 << 5)
71 #define S3C_PCM_IRQCTL_RXALMSTEMPTEN (0x1 << 4)
72 #define S3C_PCM_IRQCTL_RXFULLEN (0x1 << 3)
73 #define S3C_PCM_IRQCTL_RXALMSTFULLEN (0x1 << 2)
74 #define S3C_PCM_IRQCTL_RXSTARVEN (0x1 << 1)
75 #define S3C_PCM_IRQCTL_RXERROVRFLEN (0x1 << 0)
76
77
78 #define S3C_PCM_IRQSTAT_IRQPND (0x1 << 13)
79 #define S3C_PCM_IRQSTAT_WRD_XFER (0x1 << 12)
80 #define S3C_PCM_IRQSTAT_TXEMPTY (0x1 << 11)
81 #define S3C_PCM_IRQSTAT_TXALMSTEMPTY (0x1 << 10)
82 #define S3C_PCM_IRQSTAT_TXFULL (0x1 << 9)
83 #define S3C_PCM_IRQSTAT_TXALMSTFULL (0x1 << 8)
84 #define S3C_PCM_IRQSTAT_TXSTARV (0x1 << 7)
85 #define S3C_PCM_IRQSTAT_TXERROVRFL (0x1 << 6)
86 #define S3C_PCM_IRQSTAT_RXEMPT (0x1 << 5)
87 #define S3C_PCM_IRQSTAT_RXALMSTEMPT (0x1 << 4)
88 #define S3C_PCM_IRQSTAT_RXFULL (0x1 << 3)
89 #define S3C_PCM_IRQSTAT_RXALMSTFULL (0x1 << 2)
90 #define S3C_PCM_IRQSTAT_RXSTARV (0x1 << 1)
91 #define S3C_PCM_IRQSTAT_RXERROVRFL (0x1 << 0)
92
93
94 #define S3C_PCM_FIFOSTAT_TXCNT_MSK (0x3f << 14)
95 #define S3C_PCM_FIFOSTAT_TXFIFOEMPTY (0x1 << 13)
96 #define S3C_PCM_FIFOSTAT_TXFIFOALMSTEMPTY (0x1 << 12)
97 #define S3C_PCM_FIFOSTAT_TXFIFOFULL (0x1 << 11)
98 #define S3C_PCM_FIFOSTAT_TXFIFOALMSTFULL (0x1 << 10)
99 #define S3C_PCM_FIFOSTAT_RXCNT_MSK (0x3f << 4)
100 #define S3C_PCM_FIFOSTAT_RXFIFOEMPTY (0x1 << 3)
101 #define S3C_PCM_FIFOSTAT_RXFIFOALMSTEMPTY (0x1 << 2)
102 #define S3C_PCM_FIFOSTAT_RXFIFOFULL (0x1 << 1)
103 #define S3C_PCM_FIFOSTAT_RXFIFOALMSTFULL (0x1 << 0)
104
105
106
107
108
109
110
111
112 struct s3c_pcm_info {
113 spinlock_t lock;
114 struct device *dev;
115 void __iomem *regs;
116
117 unsigned int sclk_per_fs;
118
119
120 unsigned int idleclk;
121
122 struct clk *pclk;
123 struct clk *cclk;
124
125 struct snd_dmaengine_dai_dma_data *dma_playback;
126 struct snd_dmaengine_dai_dma_data *dma_capture;
127 };
128
129 static struct snd_dmaengine_dai_dma_data s3c_pcm_stereo_out[] = {
130 [0] = {
131 .addr_width = 4,
132 },
133 [1] = {
134 .addr_width = 4,
135 },
136 };
137
138 static struct snd_dmaengine_dai_dma_data s3c_pcm_stereo_in[] = {
139 [0] = {
140 .addr_width = 4,
141 },
142 [1] = {
143 .addr_width = 4,
144 },
145 };
146
147 static struct s3c_pcm_info s3c_pcm[2];
148
149 static void s3c_pcm_snd_txctrl(struct s3c_pcm_info *pcm, int on)
150 {
151 void __iomem *regs = pcm->regs;
152 u32 ctl, clkctl;
153
154 clkctl = readl(regs + S3C_PCM_CLKCTL);
155 ctl = readl(regs + S3C_PCM_CTL);
156 ctl &= ~(S3C_PCM_CTL_TXDIPSTICK_MASK
157 << S3C_PCM_CTL_TXDIPSTICK_SHIFT);
158
159 if (on) {
160 ctl |= S3C_PCM_CTL_TXDMA_EN;
161 ctl |= S3C_PCM_CTL_TXFIFO_EN;
162 ctl |= S3C_PCM_CTL_ENABLE;
163 ctl |= (0x4<<S3C_PCM_CTL_TXDIPSTICK_SHIFT);
164 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
165 } else {
166 ctl &= ~S3C_PCM_CTL_TXDMA_EN;
167 ctl &= ~S3C_PCM_CTL_TXFIFO_EN;
168
169 if (!(ctl & S3C_PCM_CTL_RXFIFO_EN)) {
170 ctl &= ~S3C_PCM_CTL_ENABLE;
171 if (!pcm->idleclk)
172 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
173 }
174 }
175
176 writel(clkctl, regs + S3C_PCM_CLKCTL);
177 writel(ctl, regs + S3C_PCM_CTL);
178 }
179
180 static void s3c_pcm_snd_rxctrl(struct s3c_pcm_info *pcm, int on)
181 {
182 void __iomem *regs = pcm->regs;
183 u32 ctl, clkctl;
184
185 ctl = readl(regs + S3C_PCM_CTL);
186 clkctl = readl(regs + S3C_PCM_CLKCTL);
187 ctl &= ~(S3C_PCM_CTL_RXDIPSTICK_MASK
188 << S3C_PCM_CTL_RXDIPSTICK_SHIFT);
189
190 if (on) {
191 ctl |= S3C_PCM_CTL_RXDMA_EN;
192 ctl |= S3C_PCM_CTL_RXFIFO_EN;
193 ctl |= S3C_PCM_CTL_ENABLE;
194 ctl |= (0x20<<S3C_PCM_CTL_RXDIPSTICK_SHIFT);
195 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
196 } else {
197 ctl &= ~S3C_PCM_CTL_RXDMA_EN;
198 ctl &= ~S3C_PCM_CTL_RXFIFO_EN;
199
200 if (!(ctl & S3C_PCM_CTL_TXFIFO_EN)) {
201 ctl &= ~S3C_PCM_CTL_ENABLE;
202 if (!pcm->idleclk)
203 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
204 }
205 }
206
207 writel(clkctl, regs + S3C_PCM_CLKCTL);
208 writel(ctl, regs + S3C_PCM_CTL);
209 }
210
211 static int s3c_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
212 struct snd_soc_dai *dai)
213 {
214 struct snd_soc_pcm_runtime *rtd = substream->private_data;
215 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(rtd->cpu_dai);
216 unsigned long flags;
217
218 dev_dbg(pcm->dev, "Entered %s\n", __func__);
219
220 switch (cmd) {
221 case SNDRV_PCM_TRIGGER_START:
222 case SNDRV_PCM_TRIGGER_RESUME:
223 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
224 spin_lock_irqsave(&pcm->lock, flags);
225
226 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
227 s3c_pcm_snd_rxctrl(pcm, 1);
228 else
229 s3c_pcm_snd_txctrl(pcm, 1);
230
231 spin_unlock_irqrestore(&pcm->lock, flags);
232 break;
233
234 case SNDRV_PCM_TRIGGER_STOP:
235 case SNDRV_PCM_TRIGGER_SUSPEND:
236 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
237 spin_lock_irqsave(&pcm->lock, flags);
238
239 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
240 s3c_pcm_snd_rxctrl(pcm, 0);
241 else
242 s3c_pcm_snd_txctrl(pcm, 0);
243
244 spin_unlock_irqrestore(&pcm->lock, flags);
245 break;
246
247 default:
248 return -EINVAL;
249 }
250
251 return 0;
252 }
253
254 static int s3c_pcm_hw_params(struct snd_pcm_substream *substream,
255 struct snd_pcm_hw_params *params,
256 struct snd_soc_dai *socdai)
257 {
258 struct snd_soc_pcm_runtime *rtd = substream->private_data;
259 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(rtd->cpu_dai);
260 void __iomem *regs = pcm->regs;
261 struct clk *clk;
262 int sclk_div, sync_div;
263 unsigned long flags;
264 u32 clkctl;
265
266 dev_dbg(pcm->dev, "Entered %s\n", __func__);
267
268
269 switch (params_width(params)) {
270 case 16:
271 break;
272 default:
273 return -EINVAL;
274 }
275
276 spin_lock_irqsave(&pcm->lock, flags);
277
278
279 clkctl = readl(regs + S3C_PCM_CLKCTL);
280 if (clkctl & S3C_PCM_CLKCTL_SERCLKSEL_PCLK)
281 clk = pcm->pclk;
282 else
283 clk = pcm->cclk;
284
285
286 sclk_div = clk_get_rate(clk) / pcm->sclk_per_fs /
287 params_rate(params) / 2 - 1;
288
289 clkctl &= ~(S3C_PCM_CLKCTL_SCLKDIV_MASK
290 << S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
291 clkctl |= ((sclk_div & S3C_PCM_CLKCTL_SCLKDIV_MASK)
292 << S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
293
294
295 sync_div = pcm->sclk_per_fs - 1;
296
297 clkctl &= ~(S3C_PCM_CLKCTL_SYNCDIV_MASK
298 << S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
299 clkctl |= ((sync_div & S3C_PCM_CLKCTL_SYNCDIV_MASK)
300 << S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
301
302 writel(clkctl, regs + S3C_PCM_CLKCTL);
303
304 spin_unlock_irqrestore(&pcm->lock, flags);
305
306 dev_dbg(pcm->dev, "PCMSOURCE_CLK-%lu SCLK=%ufs SCLK_DIV=%d SYNC_DIV=%d\n",
307 clk_get_rate(clk), pcm->sclk_per_fs,
308 sclk_div, sync_div);
309
310 return 0;
311 }
312
313 static int s3c_pcm_set_fmt(struct snd_soc_dai *cpu_dai,
314 unsigned int fmt)
315 {
316 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai);
317 void __iomem *regs = pcm->regs;
318 unsigned long flags;
319 int ret = 0;
320 u32 ctl;
321
322 dev_dbg(pcm->dev, "Entered %s\n", __func__);
323
324 spin_lock_irqsave(&pcm->lock, flags);
325
326 ctl = readl(regs + S3C_PCM_CTL);
327
328 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
329 case SND_SOC_DAIFMT_IB_NF:
330
331 break;
332 default:
333 dev_err(pcm->dev, "Unsupported clock inversion!\n");
334 ret = -EINVAL;
335 goto exit;
336 }
337
338 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
339 case SND_SOC_DAIFMT_CBS_CFS:
340
341 break;
342 default:
343 dev_err(pcm->dev, "Unsupported master/slave format!\n");
344 ret = -EINVAL;
345 goto exit;
346 }
347
348 switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
349 case SND_SOC_DAIFMT_CONT:
350 pcm->idleclk = 1;
351 break;
352 case SND_SOC_DAIFMT_GATED:
353 pcm->idleclk = 0;
354 break;
355 default:
356 dev_err(pcm->dev, "Invalid Clock gating request!\n");
357 ret = -EINVAL;
358 goto exit;
359 }
360
361 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
362 case SND_SOC_DAIFMT_DSP_A:
363 ctl |= S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
364 ctl |= S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
365 break;
366 case SND_SOC_DAIFMT_DSP_B:
367 ctl &= ~S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
368 ctl &= ~S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
369 break;
370 default:
371 dev_err(pcm->dev, "Unsupported data format!\n");
372 ret = -EINVAL;
373 goto exit;
374 }
375
376 writel(ctl, regs + S3C_PCM_CTL);
377
378 exit:
379 spin_unlock_irqrestore(&pcm->lock, flags);
380
381 return ret;
382 }
383
384 static int s3c_pcm_set_clkdiv(struct snd_soc_dai *cpu_dai,
385 int div_id, int div)
386 {
387 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai);
388
389 switch (div_id) {
390 case S3C_PCM_SCLK_PER_FS:
391 pcm->sclk_per_fs = div;
392 break;
393
394 default:
395 return -EINVAL;
396 }
397
398 return 0;
399 }
400
401 static int s3c_pcm_set_sysclk(struct snd_soc_dai *cpu_dai,
402 int clk_id, unsigned int freq, int dir)
403 {
404 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai);
405 void __iomem *regs = pcm->regs;
406 u32 clkctl = readl(regs + S3C_PCM_CLKCTL);
407
408 switch (clk_id) {
409 case S3C_PCM_CLKSRC_PCLK:
410 clkctl |= S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
411 break;
412
413 case S3C_PCM_CLKSRC_MUX:
414 clkctl &= ~S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
415
416 if (clk_get_rate(pcm->cclk) != freq)
417 clk_set_rate(pcm->cclk, freq);
418
419 break;
420
421 default:
422 return -EINVAL;
423 }
424
425 writel(clkctl, regs + S3C_PCM_CLKCTL);
426
427 return 0;
428 }
429
430 static const struct snd_soc_dai_ops s3c_pcm_dai_ops = {
431 .set_sysclk = s3c_pcm_set_sysclk,
432 .set_clkdiv = s3c_pcm_set_clkdiv,
433 .trigger = s3c_pcm_trigger,
434 .hw_params = s3c_pcm_hw_params,
435 .set_fmt = s3c_pcm_set_fmt,
436 };
437
438 static int s3c_pcm_dai_probe(struct snd_soc_dai *dai)
439 {
440 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(dai);
441
442 snd_soc_dai_init_dma_data(dai, pcm->dma_playback, pcm->dma_capture);
443
444 return 0;
445 }
446
447 #define S3C_PCM_RATES SNDRV_PCM_RATE_8000_96000
448
449 #define S3C_PCM_DAI_DECLARE \
450 .symmetric_rates = 1, \
451 .probe = s3c_pcm_dai_probe, \
452 .ops = &s3c_pcm_dai_ops, \
453 .playback = { \
454 .channels_min = 2, \
455 .channels_max = 2, \
456 .rates = S3C_PCM_RATES, \
457 .formats = SNDRV_PCM_FMTBIT_S16_LE, \
458 }, \
459 .capture = { \
460 .channels_min = 2, \
461 .channels_max = 2, \
462 .rates = S3C_PCM_RATES, \
463 .formats = SNDRV_PCM_FMTBIT_S16_LE, \
464 }
465
466 static struct snd_soc_dai_driver s3c_pcm_dai[] = {
467 [0] = {
468 .name = "samsung-pcm.0",
469 S3C_PCM_DAI_DECLARE,
470 },
471 [1] = {
472 .name = "samsung-pcm.1",
473 S3C_PCM_DAI_DECLARE,
474 },
475 };
476
477 static const struct snd_soc_component_driver s3c_pcm_component = {
478 .name = "s3c-pcm",
479 };
480
481 static int s3c_pcm_dev_probe(struct platform_device *pdev)
482 {
483 struct s3c_pcm_info *pcm;
484 struct resource *mem_res;
485 struct s3c_audio_pdata *pcm_pdata;
486 dma_filter_fn filter;
487 int ret;
488
489
490 if ((pdev->id < 0) || pdev->id >= ARRAY_SIZE(s3c_pcm)) {
491 dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
492 return -EINVAL;
493 }
494
495 pcm_pdata = pdev->dev.platform_data;
496
497 if (pcm_pdata && pcm_pdata->cfg_gpio && pcm_pdata->cfg_gpio(pdev)) {
498 dev_err(&pdev->dev, "Unable to configure gpio\n");
499 return -EINVAL;
500 }
501
502 pcm = &s3c_pcm[pdev->id];
503 pcm->dev = &pdev->dev;
504
505 spin_lock_init(&pcm->lock);
506
507
508 pcm->sclk_per_fs = 128;
509
510 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
511 pcm->regs = devm_ioremap_resource(&pdev->dev, mem_res);
512 if (IS_ERR(pcm->regs))
513 return PTR_ERR(pcm->regs);
514
515 pcm->cclk = devm_clk_get(&pdev->dev, "audio-bus");
516 if (IS_ERR(pcm->cclk)) {
517 dev_err(&pdev->dev, "failed to get audio-bus clock\n");
518 return PTR_ERR(pcm->cclk);
519 }
520 ret = clk_prepare_enable(pcm->cclk);
521 if (ret)
522 return ret;
523
524
525 dev_set_drvdata(&pdev->dev, pcm);
526
527 pcm->pclk = devm_clk_get(&pdev->dev, "pcm");
528 if (IS_ERR(pcm->pclk)) {
529 dev_err(&pdev->dev, "failed to get pcm clock\n");
530 ret = PTR_ERR(pcm->pclk);
531 goto err_dis_cclk;
532 }
533 ret = clk_prepare_enable(pcm->pclk);
534 if (ret)
535 goto err_dis_cclk;
536
537 s3c_pcm_stereo_in[pdev->id].addr = mem_res->start + S3C_PCM_RXFIFO;
538 s3c_pcm_stereo_out[pdev->id].addr = mem_res->start + S3C_PCM_TXFIFO;
539
540 filter = NULL;
541 if (pcm_pdata) {
542 s3c_pcm_stereo_in[pdev->id].filter_data = pcm_pdata->dma_capture;
543 s3c_pcm_stereo_out[pdev->id].filter_data = pcm_pdata->dma_playback;
544 filter = pcm_pdata->dma_filter;
545 }
546
547 pcm->dma_capture = &s3c_pcm_stereo_in[pdev->id];
548 pcm->dma_playback = &s3c_pcm_stereo_out[pdev->id];
549
550 ret = samsung_asoc_dma_platform_register(&pdev->dev, filter,
551 NULL, NULL, NULL);
552 if (ret) {
553 dev_err(&pdev->dev, "failed to get register DMA: %d\n", ret);
554 goto err_dis_pclk;
555 }
556
557 pm_runtime_enable(&pdev->dev);
558
559 ret = devm_snd_soc_register_component(&pdev->dev, &s3c_pcm_component,
560 &s3c_pcm_dai[pdev->id], 1);
561 if (ret != 0) {
562 dev_err(&pdev->dev, "failed to get register DAI: %d\n", ret);
563 goto err_dis_pm;
564 }
565
566 return 0;
567
568 err_dis_pm:
569 pm_runtime_disable(&pdev->dev);
570 err_dis_pclk:
571 clk_disable_unprepare(pcm->pclk);
572 err_dis_cclk:
573 clk_disable_unprepare(pcm->cclk);
574 return ret;
575 }
576
577 static int s3c_pcm_dev_remove(struct platform_device *pdev)
578 {
579 struct s3c_pcm_info *pcm = &s3c_pcm[pdev->id];
580
581 pm_runtime_disable(&pdev->dev);
582 clk_disable_unprepare(pcm->cclk);
583 clk_disable_unprepare(pcm->pclk);
584
585 return 0;
586 }
587
588 static struct platform_driver s3c_pcm_driver = {
589 .probe = s3c_pcm_dev_probe,
590 .remove = s3c_pcm_dev_remove,
591 .driver = {
592 .name = "samsung-pcm",
593 },
594 };
595
596 module_platform_driver(s3c_pcm_driver);
597
598
599 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
600 MODULE_DESCRIPTION("S3C PCM Controller Driver");
601 MODULE_LICENSE("GPL");
602 MODULE_ALIAS("platform:samsung-pcm");