blob: 56780206c000be484f2f9651e6be53158794cc7d [file] [log] [blame]
Jassi Brar5033f432010-11-22 15:37:25 +09001/* sound/soc/samsung/pcm.c
Jassi Brar357a1db2009-11-17 16:54:03 +09002 *
3 * ALSA SoC Audio Layer - S3C PCM-Controller driver
4 *
5 * Copyright (c) 2009 Samsung Electronics Co. Ltd
6 * Author: Jaswinder Singh <jassi.brar@samsung.com>
7 * based upon I2S drivers by Ben Dooks.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
Jassi Brar357a1db2009-11-17 16:54:03 +090014#include <linux/clk.h>
Jassi Brar357a1db2009-11-17 16:54:03 +090015#include <linux/io.h>
Paul Gortmakerda155d52011-07-15 12:38:28 -040016#include <linux/module.h>
Mark Brownc5cf4db2011-12-08 16:45:03 +080017#include <linux/pm_runtime.h>
Jassi Brar357a1db2009-11-17 16:54:03 +090018
Jassi Brar357a1db2009-11-17 16:54:03 +090019#include <sound/soc.h>
Seungwhan Youn0378b6a2011-01-11 07:26:06 +090020#include <sound/pcm_params.h>
Jassi Brar357a1db2009-11-17 16:54:03 +090021
22#include <plat/audio.h>
23#include <plat/dma.h>
24
Jassi Brar4b640cf2010-11-22 15:35:57 +090025#include "dma.h"
Jassi Brar158a78282010-11-22 15:36:44 +090026#include "pcm.h"
Jassi Brar357a1db2009-11-17 16:54:03 +090027
Seungwhan Youn9c6df192011-01-07 13:57:23 +090028/*Register Offsets */
29#define S3C_PCM_CTL 0x00
30#define S3C_PCM_CLKCTL 0x04
31#define S3C_PCM_TXFIFO 0x08
32#define S3C_PCM_RXFIFO 0x0C
33#define S3C_PCM_IRQCTL 0x10
34#define S3C_PCM_IRQSTAT 0x14
35#define S3C_PCM_FIFOSTAT 0x18
36#define S3C_PCM_CLRINT 0x20
37
38/* PCM_CTL Bit-Fields */
39#define S3C_PCM_CTL_TXDIPSTICK_MASK 0x3f
40#define S3C_PCM_CTL_TXDIPSTICK_SHIFT 13
41#define S3C_PCM_CTL_RXDIPSTICK_MASK 0x3f
42#define S3C_PCM_CTL_RXDIPSTICK_SHIFT 7
43#define S3C_PCM_CTL_TXDMA_EN (0x1 << 6)
44#define S3C_PCM_CTL_RXDMA_EN (0x1 << 5)
45#define S3C_PCM_CTL_TXMSB_AFTER_FSYNC (0x1 << 4)
46#define S3C_PCM_CTL_RXMSB_AFTER_FSYNC (0x1 << 3)
47#define S3C_PCM_CTL_TXFIFO_EN (0x1 << 2)
48#define S3C_PCM_CTL_RXFIFO_EN (0x1 << 1)
49#define S3C_PCM_CTL_ENABLE (0x1 << 0)
50
51/* PCM_CLKCTL Bit-Fields */
52#define S3C_PCM_CLKCTL_SERCLK_EN (0x1 << 19)
53#define S3C_PCM_CLKCTL_SERCLKSEL_PCLK (0x1 << 18)
54#define S3C_PCM_CLKCTL_SCLKDIV_MASK 0x1ff
55#define S3C_PCM_CLKCTL_SYNCDIV_MASK 0x1ff
56#define S3C_PCM_CLKCTL_SCLKDIV_SHIFT 9
57#define S3C_PCM_CLKCTL_SYNCDIV_SHIFT 0
58
59/* PCM_TXFIFO Bit-Fields */
60#define S3C_PCM_TXFIFO_DVALID (0x1 << 16)
61#define S3C_PCM_TXFIFO_DATA_MSK (0xffff << 0)
62
63/* PCM_RXFIFO Bit-Fields */
64#define S3C_PCM_RXFIFO_DVALID (0x1 << 16)
65#define S3C_PCM_RXFIFO_DATA_MSK (0xffff << 0)
66
67/* PCM_IRQCTL Bit-Fields */
68#define S3C_PCM_IRQCTL_IRQEN (0x1 << 14)
69#define S3C_PCM_IRQCTL_WRDEN (0x1 << 12)
70#define S3C_PCM_IRQCTL_TXEMPTYEN (0x1 << 11)
71#define S3C_PCM_IRQCTL_TXALMSTEMPTYEN (0x1 << 10)
72#define S3C_PCM_IRQCTL_TXFULLEN (0x1 << 9)
73#define S3C_PCM_IRQCTL_TXALMSTFULLEN (0x1 << 8)
74#define S3C_PCM_IRQCTL_TXSTARVEN (0x1 << 7)
75#define S3C_PCM_IRQCTL_TXERROVRFLEN (0x1 << 6)
76#define S3C_PCM_IRQCTL_RXEMPTEN (0x1 << 5)
77#define S3C_PCM_IRQCTL_RXALMSTEMPTEN (0x1 << 4)
78#define S3C_PCM_IRQCTL_RXFULLEN (0x1 << 3)
79#define S3C_PCM_IRQCTL_RXALMSTFULLEN (0x1 << 2)
80#define S3C_PCM_IRQCTL_RXSTARVEN (0x1 << 1)
81#define S3C_PCM_IRQCTL_RXERROVRFLEN (0x1 << 0)
82
83/* PCM_IRQSTAT Bit-Fields */
84#define S3C_PCM_IRQSTAT_IRQPND (0x1 << 13)
85#define S3C_PCM_IRQSTAT_WRD_XFER (0x1 << 12)
86#define S3C_PCM_IRQSTAT_TXEMPTY (0x1 << 11)
87#define S3C_PCM_IRQSTAT_TXALMSTEMPTY (0x1 << 10)
88#define S3C_PCM_IRQSTAT_TXFULL (0x1 << 9)
89#define S3C_PCM_IRQSTAT_TXALMSTFULL (0x1 << 8)
90#define S3C_PCM_IRQSTAT_TXSTARV (0x1 << 7)
91#define S3C_PCM_IRQSTAT_TXERROVRFL (0x1 << 6)
92#define S3C_PCM_IRQSTAT_RXEMPT (0x1 << 5)
93#define S3C_PCM_IRQSTAT_RXALMSTEMPT (0x1 << 4)
94#define S3C_PCM_IRQSTAT_RXFULL (0x1 << 3)
95#define S3C_PCM_IRQSTAT_RXALMSTFULL (0x1 << 2)
96#define S3C_PCM_IRQSTAT_RXSTARV (0x1 << 1)
97#define S3C_PCM_IRQSTAT_RXERROVRFL (0x1 << 0)
98
99/* PCM_FIFOSTAT Bit-Fields */
100#define S3C_PCM_FIFOSTAT_TXCNT_MSK (0x3f << 14)
101#define S3C_PCM_FIFOSTAT_TXFIFOEMPTY (0x1 << 13)
102#define S3C_PCM_FIFOSTAT_TXFIFOALMSTEMPTY (0x1 << 12)
103#define S3C_PCM_FIFOSTAT_TXFIFOFULL (0x1 << 11)
104#define S3C_PCM_FIFOSTAT_TXFIFOALMSTFULL (0x1 << 10)
105#define S3C_PCM_FIFOSTAT_RXCNT_MSK (0x3f << 4)
106#define S3C_PCM_FIFOSTAT_RXFIFOEMPTY (0x1 << 3)
107#define S3C_PCM_FIFOSTAT_RXFIFOALMSTEMPTY (0x1 << 2)
108#define S3C_PCM_FIFOSTAT_RXFIFOFULL (0x1 << 1)
109#define S3C_PCM_FIFOSTAT_RXFIFOALMSTFULL (0x1 << 0)
110
111/**
112 * struct s3c_pcm_info - S3C PCM Controller information
113 * @dev: The parent device passed to use from the probe.
114 * @regs: The pointer to the device register block.
115 * @dma_playback: DMA information for playback channel.
116 * @dma_capture: DMA information for capture channel.
117 */
118struct s3c_pcm_info {
119 spinlock_t lock;
120 struct device *dev;
121 void __iomem *regs;
122
123 unsigned int sclk_per_fs;
124
125 /* Whether to keep PCMSCLK enabled even when idle(no active xfer) */
126 unsigned int idleclk;
127
128 struct clk *pclk;
129 struct clk *cclk;
130
131 struct s3c_dma_params *dma_playback;
132 struct s3c_dma_params *dma_capture;
133};
134
Jassi Brar357a1db2009-11-17 16:54:03 +0900135static struct s3c2410_dma_client s3c_pcm_dma_client_out = {
136 .name = "PCM Stereo out"
137};
138
139static struct s3c2410_dma_client s3c_pcm_dma_client_in = {
140 .name = "PCM Stereo in"
141};
142
143static struct s3c_dma_params s3c_pcm_stereo_out[] = {
144 [0] = {
145 .client = &s3c_pcm_dma_client_out,
146 .dma_size = 4,
147 },
148 [1] = {
149 .client = &s3c_pcm_dma_client_out,
150 .dma_size = 4,
151 },
152};
153
154static struct s3c_dma_params s3c_pcm_stereo_in[] = {
155 [0] = {
156 .client = &s3c_pcm_dma_client_in,
157 .dma_size = 4,
158 },
159 [1] = {
160 .client = &s3c_pcm_dma_client_in,
161 .dma_size = 4,
162 },
163};
164
165static struct s3c_pcm_info s3c_pcm[2];
166
Jassi Brar357a1db2009-11-17 16:54:03 +0900167static void s3c_pcm_snd_txctrl(struct s3c_pcm_info *pcm, int on)
168{
169 void __iomem *regs = pcm->regs;
170 u32 ctl, clkctl;
171
172 clkctl = readl(regs + S3C_PCM_CLKCTL);
173 ctl = readl(regs + S3C_PCM_CTL);
174 ctl &= ~(S3C_PCM_CTL_TXDIPSTICK_MASK
175 << S3C_PCM_CTL_TXDIPSTICK_SHIFT);
176
177 if (on) {
178 ctl |= S3C_PCM_CTL_TXDMA_EN;
179 ctl |= S3C_PCM_CTL_TXFIFO_EN;
180 ctl |= S3C_PCM_CTL_ENABLE;
Seungwhan Youn29f9e392010-09-10 17:20:45 +0900181 ctl |= (0x4<<S3C_PCM_CTL_TXDIPSTICK_SHIFT);
Jassi Brar357a1db2009-11-17 16:54:03 +0900182 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
183 } else {
184 ctl &= ~S3C_PCM_CTL_TXDMA_EN;
185 ctl &= ~S3C_PCM_CTL_TXFIFO_EN;
186
187 if (!(ctl & S3C_PCM_CTL_RXFIFO_EN)) {
188 ctl &= ~S3C_PCM_CTL_ENABLE;
189 if (!pcm->idleclk)
190 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
191 }
192 }
193
194 writel(clkctl, regs + S3C_PCM_CLKCTL);
195 writel(ctl, regs + S3C_PCM_CTL);
196}
197
198static void s3c_pcm_snd_rxctrl(struct s3c_pcm_info *pcm, int on)
199{
200 void __iomem *regs = pcm->regs;
201 u32 ctl, clkctl;
202
203 ctl = readl(regs + S3C_PCM_CTL);
204 clkctl = readl(regs + S3C_PCM_CLKCTL);
Seungwhan Youn0cca9012010-09-10 17:20:00 +0900205 ctl &= ~(S3C_PCM_CTL_RXDIPSTICK_MASK
206 << S3C_PCM_CTL_RXDIPSTICK_SHIFT);
Jassi Brar357a1db2009-11-17 16:54:03 +0900207
208 if (on) {
209 ctl |= S3C_PCM_CTL_RXDMA_EN;
210 ctl |= S3C_PCM_CTL_RXFIFO_EN;
211 ctl |= S3C_PCM_CTL_ENABLE;
Seungwhan Youn0cca9012010-09-10 17:20:00 +0900212 ctl |= (0x20<<S3C_PCM_CTL_RXDIPSTICK_SHIFT);
Jassi Brar357a1db2009-11-17 16:54:03 +0900213 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
214 } else {
215 ctl &= ~S3C_PCM_CTL_RXDMA_EN;
216 ctl &= ~S3C_PCM_CTL_RXFIFO_EN;
217
218 if (!(ctl & S3C_PCM_CTL_TXFIFO_EN)) {
219 ctl &= ~S3C_PCM_CTL_ENABLE;
220 if (!pcm->idleclk)
221 clkctl |= S3C_PCM_CLKCTL_SERCLK_EN;
222 }
223 }
224
225 writel(clkctl, regs + S3C_PCM_CLKCTL);
226 writel(ctl, regs + S3C_PCM_CTL);
227}
228
229static int s3c_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
230 struct snd_soc_dai *dai)
231{
232 struct snd_soc_pcm_runtime *rtd = substream->private_data;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000233 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(rtd->cpu_dai);
Jassi Brar357a1db2009-11-17 16:54:03 +0900234 unsigned long flags;
235
236 dev_dbg(pcm->dev, "Entered %s\n", __func__);
237
238 switch (cmd) {
239 case SNDRV_PCM_TRIGGER_START:
240 case SNDRV_PCM_TRIGGER_RESUME:
241 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
242 spin_lock_irqsave(&pcm->lock, flags);
243
244 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
245 s3c_pcm_snd_rxctrl(pcm, 1);
246 else
247 s3c_pcm_snd_txctrl(pcm, 1);
248
249 spin_unlock_irqrestore(&pcm->lock, flags);
250 break;
251
252 case SNDRV_PCM_TRIGGER_STOP:
253 case SNDRV_PCM_TRIGGER_SUSPEND:
254 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
255 spin_lock_irqsave(&pcm->lock, flags);
256
257 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
258 s3c_pcm_snd_rxctrl(pcm, 0);
259 else
260 s3c_pcm_snd_txctrl(pcm, 0);
261
262 spin_unlock_irqrestore(&pcm->lock, flags);
263 break;
264
265 default:
266 return -EINVAL;
267 }
268
269 return 0;
270}
271
272static int s3c_pcm_hw_params(struct snd_pcm_substream *substream,
273 struct snd_pcm_hw_params *params,
274 struct snd_soc_dai *socdai)
275{
276 struct snd_soc_pcm_runtime *rtd = substream->private_data;
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000277 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(rtd->cpu_dai);
Daniel Mack5f712b22010-03-22 10:11:15 +0100278 struct s3c_dma_params *dma_data;
Jassi Brar357a1db2009-11-17 16:54:03 +0900279 void __iomem *regs = pcm->regs;
280 struct clk *clk;
281 int sclk_div, sync_div;
282 unsigned long flags;
283 u32 clkctl;
284
285 dev_dbg(pcm->dev, "Entered %s\n", __func__);
286
287 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
Daniel Mack5f712b22010-03-22 10:11:15 +0100288 dma_data = pcm->dma_playback;
Jassi Brar357a1db2009-11-17 16:54:03 +0900289 else
Daniel Mack5f712b22010-03-22 10:11:15 +0100290 dma_data = pcm->dma_capture;
291
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000292 snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_data);
Jassi Brar357a1db2009-11-17 16:54:03 +0900293
294 /* Strictly check for sample size */
295 switch (params_format(params)) {
296 case SNDRV_PCM_FORMAT_S16_LE:
297 break;
298 default:
299 return -EINVAL;
300 }
301
302 spin_lock_irqsave(&pcm->lock, flags);
303
304 /* Get hold of the PCMSOURCE_CLK */
305 clkctl = readl(regs + S3C_PCM_CLKCTL);
306 if (clkctl & S3C_PCM_CLKCTL_SERCLKSEL_PCLK)
307 clk = pcm->pclk;
308 else
309 clk = pcm->cclk;
310
311 /* Set the SCLK divider */
312 sclk_div = clk_get_rate(clk) / pcm->sclk_per_fs /
313 params_rate(params) / 2 - 1;
314
315 clkctl &= ~(S3C_PCM_CLKCTL_SCLKDIV_MASK
316 << S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
317 clkctl |= ((sclk_div & S3C_PCM_CLKCTL_SCLKDIV_MASK)
318 << S3C_PCM_CLKCTL_SCLKDIV_SHIFT);
319
320 /* Set the SYNC divider */
321 sync_div = pcm->sclk_per_fs - 1;
322
323 clkctl &= ~(S3C_PCM_CLKCTL_SYNCDIV_MASK
324 << S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
325 clkctl |= ((sync_div & S3C_PCM_CLKCTL_SYNCDIV_MASK)
326 << S3C_PCM_CLKCTL_SYNCDIV_SHIFT);
327
328 writel(clkctl, regs + S3C_PCM_CLKCTL);
329
330 spin_unlock_irqrestore(&pcm->lock, flags);
331
Joe Perches59cdd9b2010-02-01 23:22:16 -0800332 dev_dbg(pcm->dev, "PCMSOURCE_CLK-%lu SCLK=%ufs SCLK_DIV=%d SYNC_DIV=%d\n",
Jassi Brar357a1db2009-11-17 16:54:03 +0900333 clk_get_rate(clk), pcm->sclk_per_fs,
334 sclk_div, sync_div);
335
336 return 0;
337}
338
339static int s3c_pcm_set_fmt(struct snd_soc_dai *cpu_dai,
340 unsigned int fmt)
341{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000342 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai);
Jassi Brar357a1db2009-11-17 16:54:03 +0900343 void __iomem *regs = pcm->regs;
344 unsigned long flags;
345 int ret = 0;
346 u32 ctl;
347
348 dev_dbg(pcm->dev, "Entered %s\n", __func__);
349
350 spin_lock_irqsave(&pcm->lock, flags);
351
352 ctl = readl(regs + S3C_PCM_CTL);
353
354 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
Sangbeom Kim68e0c662011-04-09 10:53:58 +0900355 case SND_SOC_DAIFMT_IB_NF:
356 /* Nothing to do, IB_NF by default */
Jassi Brar357a1db2009-11-17 16:54:03 +0900357 break;
358 default:
359 dev_err(pcm->dev, "Unsupported clock inversion!\n");
360 ret = -EINVAL;
361 goto exit;
362 }
363
364 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
365 case SND_SOC_DAIFMT_CBS_CFS:
366 /* Nothing to do, Master by default */
367 break;
368 default:
369 dev_err(pcm->dev, "Unsupported master/slave format!\n");
370 ret = -EINVAL;
371 goto exit;
372 }
373
374 switch (fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
375 case SND_SOC_DAIFMT_CONT:
376 pcm->idleclk = 1;
377 break;
378 case SND_SOC_DAIFMT_GATED:
379 pcm->idleclk = 0;
380 break;
381 default:
382 dev_err(pcm->dev, "Invalid Clock gating request!\n");
383 ret = -EINVAL;
384 goto exit;
385 }
386
387 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
388 case SND_SOC_DAIFMT_DSP_A:
389 ctl |= S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
390 ctl |= S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
391 break;
392 case SND_SOC_DAIFMT_DSP_B:
393 ctl &= ~S3C_PCM_CTL_TXMSB_AFTER_FSYNC;
394 ctl &= ~S3C_PCM_CTL_RXMSB_AFTER_FSYNC;
395 break;
396 default:
397 dev_err(pcm->dev, "Unsupported data format!\n");
398 ret = -EINVAL;
399 goto exit;
400 }
401
402 writel(ctl, regs + S3C_PCM_CTL);
403
404exit:
405 spin_unlock_irqrestore(&pcm->lock, flags);
406
407 return ret;
408}
409
410static int s3c_pcm_set_clkdiv(struct snd_soc_dai *cpu_dai,
411 int div_id, int div)
412{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000413 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai);
Jassi Brar357a1db2009-11-17 16:54:03 +0900414
415 switch (div_id) {
416 case S3C_PCM_SCLK_PER_FS:
417 pcm->sclk_per_fs = div;
418 break;
419
420 default:
421 return -EINVAL;
422 }
423
424 return 0;
425}
426
427static int s3c_pcm_set_sysclk(struct snd_soc_dai *cpu_dai,
428 int clk_id, unsigned int freq, int dir)
429{
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000430 struct s3c_pcm_info *pcm = snd_soc_dai_get_drvdata(cpu_dai);
Jassi Brar357a1db2009-11-17 16:54:03 +0900431 void __iomem *regs = pcm->regs;
432 u32 clkctl = readl(regs + S3C_PCM_CLKCTL);
433
434 switch (clk_id) {
435 case S3C_PCM_CLKSRC_PCLK:
436 clkctl |= S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
437 break;
438
439 case S3C_PCM_CLKSRC_MUX:
440 clkctl &= ~S3C_PCM_CLKCTL_SERCLKSEL_PCLK;
441
442 if (clk_get_rate(pcm->cclk) != freq)
443 clk_set_rate(pcm->cclk, freq);
444
445 break;
446
447 default:
448 return -EINVAL;
449 }
450
451 writel(clkctl, regs + S3C_PCM_CLKCTL);
452
453 return 0;
454}
455
Lars-Peter Clausen85e76522011-11-23 11:40:40 +0100456static const struct snd_soc_dai_ops s3c_pcm_dai_ops = {
Jassi Brar357a1db2009-11-17 16:54:03 +0900457 .set_sysclk = s3c_pcm_set_sysclk,
458 .set_clkdiv = s3c_pcm_set_clkdiv,
459 .trigger = s3c_pcm_trigger,
460 .hw_params = s3c_pcm_hw_params,
461 .set_fmt = s3c_pcm_set_fmt,
462};
463
464#define S3C_PCM_RATES SNDRV_PCM_RATE_8000_96000
465
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000466#define S3C_PCM_DAI_DECLARE \
Jassi Brar357a1db2009-11-17 16:54:03 +0900467 .symmetric_rates = 1, \
468 .ops = &s3c_pcm_dai_ops, \
469 .playback = { \
470 .channels_min = 2, \
471 .channels_max = 2, \
472 .rates = S3C_PCM_RATES, \
473 .formats = SNDRV_PCM_FMTBIT_S16_LE, \
474 }, \
475 .capture = { \
476 .channels_min = 2, \
477 .channels_max = 2, \
478 .rates = S3C_PCM_RATES, \
479 .formats = SNDRV_PCM_FMTBIT_S16_LE, \
Jassi Brar12280fa2010-09-10 16:41:05 +0900480 }
Jassi Brar357a1db2009-11-17 16:54:03 +0900481
Axel Lin5ab2ab62011-12-14 19:13:26 +0800482static struct snd_soc_dai_driver s3c_pcm_dai[] = {
Jassi Brar12280fa2010-09-10 16:41:05 +0900483 [0] = {
484 .name = "samsung-pcm.0",
485 S3C_PCM_DAI_DECLARE,
486 },
487 [1] = {
488 .name = "samsung-pcm.1",
489 S3C_PCM_DAI_DECLARE,
490 },
Jassi Brar357a1db2009-11-17 16:54:03 +0900491};
Jassi Brar357a1db2009-11-17 16:54:03 +0900492
493static __devinit int s3c_pcm_dev_probe(struct platform_device *pdev)
494{
495 struct s3c_pcm_info *pcm;
Jassi Brar357a1db2009-11-17 16:54:03 +0900496 struct resource *mem_res, *dmatx_res, *dmarx_res;
497 struct s3c_audio_pdata *pcm_pdata;
498 int ret;
499
500 /* Check for valid device index */
501 if ((pdev->id < 0) || pdev->id >= ARRAY_SIZE(s3c_pcm)) {
502 dev_err(&pdev->dev, "id %d out of range\n", pdev->id);
503 return -EINVAL;
504 }
505
506 pcm_pdata = pdev->dev.platform_data;
507
508 /* Check for availability of necessary resource */
509 dmatx_res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
510 if (!dmatx_res) {
511 dev_err(&pdev->dev, "Unable to get PCM-TX dma resource\n");
512 return -ENXIO;
513 }
514
515 dmarx_res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
516 if (!dmarx_res) {
517 dev_err(&pdev->dev, "Unable to get PCM-RX dma resource\n");
518 return -ENXIO;
519 }
520
521 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
522 if (!mem_res) {
523 dev_err(&pdev->dev, "Unable to get register resource\n");
524 return -ENXIO;
525 }
526
527 if (pcm_pdata && pcm_pdata->cfg_gpio && pcm_pdata->cfg_gpio(pdev)) {
528 dev_err(&pdev->dev, "Unable to configure gpio\n");
529 return -EINVAL;
530 }
531
532 pcm = &s3c_pcm[pdev->id];
533 pcm->dev = &pdev->dev;
534
535 spin_lock_init(&pcm->lock);
536
Jassi Brar357a1db2009-11-17 16:54:03 +0900537 /* Default is 128fs */
538 pcm->sclk_per_fs = 128;
539
540 pcm->cclk = clk_get(&pdev->dev, "audio-bus");
541 if (IS_ERR(pcm->cclk)) {
542 dev_err(&pdev->dev, "failed to get audio-bus\n");
543 ret = PTR_ERR(pcm->cclk);
544 goto err1;
545 }
546 clk_enable(pcm->cclk);
547
548 /* record our pcm structure for later use in the callbacks */
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000549 dev_set_drvdata(&pdev->dev, pcm);
Jassi Brar357a1db2009-11-17 16:54:03 +0900550
551 if (!request_mem_region(mem_res->start,
552 resource_size(mem_res), "samsung-pcm")) {
553 dev_err(&pdev->dev, "Unable to request register region\n");
554 ret = -EBUSY;
555 goto err2;
556 }
557
558 pcm->regs = ioremap(mem_res->start, 0x100);
559 if (pcm->regs == NULL) {
560 dev_err(&pdev->dev, "cannot ioremap registers\n");
561 ret = -ENXIO;
562 goto err3;
563 }
564
565 pcm->pclk = clk_get(&pdev->dev, "pcm");
566 if (IS_ERR(pcm->pclk)) {
567 dev_err(&pdev->dev, "failed to get pcm_clock\n");
568 ret = -ENOENT;
569 goto err4;
570 }
571 clk_enable(pcm->pclk);
572
Jassi Brar357a1db2009-11-17 16:54:03 +0900573 s3c_pcm_stereo_in[pdev->id].dma_addr = mem_res->start
574 + S3C_PCM_RXFIFO;
575 s3c_pcm_stereo_out[pdev->id].dma_addr = mem_res->start
576 + S3C_PCM_TXFIFO;
577
578 s3c_pcm_stereo_in[pdev->id].channel = dmarx_res->start;
579 s3c_pcm_stereo_out[pdev->id].channel = dmatx_res->start;
580
581 pcm->dma_capture = &s3c_pcm_stereo_in[pdev->id];
582 pcm->dma_playback = &s3c_pcm_stereo_out[pdev->id];
583
Mark Brownc5cf4db2011-12-08 16:45:03 +0800584 pm_runtime_enable(&pdev->dev);
585
Mark Brown0c9f1102011-12-12 19:05:58 +0800586 ret = snd_soc_register_dai(&pdev->dev, &s3c_pcm_dai[pdev->id]);
587 if (ret != 0) {
588 dev_err(&pdev->dev, "failed to get register DAI: %d\n", ret);
589 goto err5;
590 }
591
Jassi Brar357a1db2009-11-17 16:54:03 +0900592 return 0;
593
594err5:
595 clk_disable(pcm->pclk);
596 clk_put(pcm->pclk);
597err4:
598 iounmap(pcm->regs);
599err3:
600 release_mem_region(mem_res->start, resource_size(mem_res));
601err2:
602 clk_disable(pcm->cclk);
603 clk_put(pcm->cclk);
604err1:
605 return ret;
606}
607
608static __devexit int s3c_pcm_dev_remove(struct platform_device *pdev)
609{
610 struct s3c_pcm_info *pcm = &s3c_pcm[pdev->id];
611 struct resource *mem_res;
612
Liam Girdwoodf0fba2a2010-03-17 20:15:21 +0000613 snd_soc_unregister_dai(&pdev->dev);
614
Mark Brownc5cf4db2011-12-08 16:45:03 +0800615 pm_runtime_disable(&pdev->dev);
616
Jassi Brar357a1db2009-11-17 16:54:03 +0900617 iounmap(pcm->regs);
618
619 mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
620 release_mem_region(mem_res->start, resource_size(mem_res));
621
622 clk_disable(pcm->cclk);
623 clk_disable(pcm->pclk);
624 clk_put(pcm->pclk);
625 clk_put(pcm->cclk);
626
627 return 0;
628}
629
630static struct platform_driver s3c_pcm_driver = {
631 .probe = s3c_pcm_dev_probe,
Axel Linc4c58392011-10-02 11:20:13 +0800632 .remove = __devexit_p(s3c_pcm_dev_remove),
Jassi Brar357a1db2009-11-17 16:54:03 +0900633 .driver = {
Jassi Brar5fbdedf2010-09-10 16:41:17 +0900634 .name = "samsung-pcm",
Jassi Brar357a1db2009-11-17 16:54:03 +0900635 .owner = THIS_MODULE,
636 },
637};
638
Mark Browne00c3f52011-11-23 15:20:13 +0000639module_platform_driver(s3c_pcm_driver);
Jassi Brar357a1db2009-11-17 16:54:03 +0900640
641/* Module information */
642MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
643MODULE_DESCRIPTION("S3C PCM Controller Driver");
644MODULE_LICENSE("GPL");
Jassi Brar5fbdedf2010-09-10 16:41:17 +0900645MODULE_ALIAS("platform:samsung-pcm");