Merge branch 'for-2.6.29' into for-2.6.30
[linux-2.6] / sound / soc / davinci / davinci-i2s.c
1 /*
2  * ALSA SoC I2S (McBSP) Audio Layer for TI DAVINCI processor
3  *
4  * Author:      Vladimir Barinov, <vbarinov@embeddedalley.com>
5  * Copyright:   (C) 2007 MontaVista Software, Inc., <source@mvista.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/init.h>
13 #include <linux/module.h>
14 #include <linux/device.h>
15 #include <linux/delay.h>
16 #include <linux/io.h>
17 #include <linux/clk.h>
18
19 #include <sound/core.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/initval.h>
23 #include <sound/soc.h>
24
25 #include "davinci-pcm.h"
26
27 #define DAVINCI_MCBSP_DRR_REG   0x00
28 #define DAVINCI_MCBSP_DXR_REG   0x04
29 #define DAVINCI_MCBSP_SPCR_REG  0x08
30 #define DAVINCI_MCBSP_RCR_REG   0x0c
31 #define DAVINCI_MCBSP_XCR_REG   0x10
32 #define DAVINCI_MCBSP_SRGR_REG  0x14
33 #define DAVINCI_MCBSP_PCR_REG   0x24
34
35 #define DAVINCI_MCBSP_SPCR_RRST         (1 << 0)
36 #define DAVINCI_MCBSP_SPCR_RINTM(v)     ((v) << 4)
37 #define DAVINCI_MCBSP_SPCR_XRST         (1 << 16)
38 #define DAVINCI_MCBSP_SPCR_XINTM(v)     ((v) << 20)
39 #define DAVINCI_MCBSP_SPCR_GRST         (1 << 22)
40 #define DAVINCI_MCBSP_SPCR_FRST         (1 << 23)
41 #define DAVINCI_MCBSP_SPCR_FREE         (1 << 25)
42
43 #define DAVINCI_MCBSP_RCR_RWDLEN1(v)    ((v) << 5)
44 #define DAVINCI_MCBSP_RCR_RFRLEN1(v)    ((v) << 8)
45 #define DAVINCI_MCBSP_RCR_RDATDLY(v)    ((v) << 16)
46 #define DAVINCI_MCBSP_RCR_RWDLEN2(v)    ((v) << 21)
47
48 #define DAVINCI_MCBSP_XCR_XWDLEN1(v)    ((v) << 5)
49 #define DAVINCI_MCBSP_XCR_XFRLEN1(v)    ((v) << 8)
50 #define DAVINCI_MCBSP_XCR_XDATDLY(v)    ((v) << 16)
51 #define DAVINCI_MCBSP_XCR_XFIG          (1 << 18)
52 #define DAVINCI_MCBSP_XCR_XWDLEN2(v)    ((v) << 21)
53
54 #define DAVINCI_MCBSP_SRGR_FWID(v)      ((v) << 8)
55 #define DAVINCI_MCBSP_SRGR_FPER(v)      ((v) << 16)
56 #define DAVINCI_MCBSP_SRGR_FSGM         (1 << 28)
57
58 #define DAVINCI_MCBSP_PCR_CLKRP         (1 << 0)
59 #define DAVINCI_MCBSP_PCR_CLKXP         (1 << 1)
60 #define DAVINCI_MCBSP_PCR_FSRP          (1 << 2)
61 #define DAVINCI_MCBSP_PCR_FSXP          (1 << 3)
62 #define DAVINCI_MCBSP_PCR_SCLKME        (1 << 7)
63 #define DAVINCI_MCBSP_PCR_CLKRM         (1 << 8)
64 #define DAVINCI_MCBSP_PCR_CLKXM         (1 << 9)
65 #define DAVINCI_MCBSP_PCR_FSRM          (1 << 10)
66 #define DAVINCI_MCBSP_PCR_FSXM          (1 << 11)
67
68 #define MOD_REG_BIT(val, mask, set) do { \
69         if (set) { \
70                 val |= mask; \
71         } else { \
72                 val &= ~mask; \
73         } \
74 } while (0)
75
76 enum {
77         DAVINCI_MCBSP_WORD_8 = 0,
78         DAVINCI_MCBSP_WORD_12,
79         DAVINCI_MCBSP_WORD_16,
80         DAVINCI_MCBSP_WORD_20,
81         DAVINCI_MCBSP_WORD_24,
82         DAVINCI_MCBSP_WORD_32,
83 };
84
85 static struct davinci_pcm_dma_params davinci_i2s_pcm_out = {
86         .name = "I2S PCM Stereo out",
87 };
88
89 static struct davinci_pcm_dma_params davinci_i2s_pcm_in = {
90         .name = "I2S PCM Stereo in",
91 };
92
93 struct davinci_mcbsp_dev {
94         void __iomem                    *base;
95         struct clk                      *clk;
96         struct davinci_pcm_dma_params   *dma_params[2];
97 };
98
99 static inline void davinci_mcbsp_write_reg(struct davinci_mcbsp_dev *dev,
100                                            int reg, u32 val)
101 {
102         __raw_writel(val, dev->base + reg);
103 }
104
105 static inline u32 davinci_mcbsp_read_reg(struct davinci_mcbsp_dev *dev, int reg)
106 {
107         return __raw_readl(dev->base + reg);
108 }
109
110 static void davinci_mcbsp_start(struct snd_pcm_substream *substream)
111 {
112         struct snd_soc_pcm_runtime *rtd = substream->private_data;
113         struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
114         struct snd_soc_device *socdev = rtd->socdev;
115         struct snd_soc_platform *platform = socdev->card->platform;
116         u32 w;
117         int ret;
118
119         /* Start the sample generator and enable transmitter/receiver */
120         w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
121         MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST, 1);
122         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
123
124         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
125                 /* Stop the DMA to avoid data loss */
126                 /* while the transmitter is out of reset to handle XSYNCERR */
127                 if (platform->pcm_ops->trigger) {
128                         ret = platform->pcm_ops->trigger(substream,
129                                 SNDRV_PCM_TRIGGER_STOP);
130                         if (ret < 0)
131                                 printk(KERN_DEBUG "Playback DMA stop failed\n");
132                 }
133
134                 /* Enable the transmitter */
135                 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
136                 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1);
137                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
138
139                 /* wait for any unexpected frame sync error to occur */
140                 udelay(100);
141
142                 /* Disable the transmitter to clear any outstanding XSYNCERR */
143                 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
144                 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0);
145                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
146
147                 /* Restart the DMA */
148                 if (platform->pcm_ops->trigger) {
149                         ret = platform->pcm_ops->trigger(substream,
150                                 SNDRV_PCM_TRIGGER_START);
151                         if (ret < 0)
152                                 printk(KERN_DEBUG "Playback DMA start failed\n");
153                 }
154                 /* Enable the transmitter */
155                 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
156                 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 1);
157                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
158
159         } else {
160
161                 /* Enable the reciever */
162                 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
163                 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 1);
164                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
165         }
166
167
168         /* Start frame sync */
169         w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
170         MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_FRST, 1);
171         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
172 }
173
174 static void davinci_mcbsp_stop(struct snd_pcm_substream *substream)
175 {
176         struct snd_soc_pcm_runtime *rtd = substream->private_data;
177         struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
178         u32 w;
179
180         /* Reset transmitter/receiver and sample rate/frame sync generators */
181         w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
182         MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_GRST |
183                        DAVINCI_MCBSP_SPCR_FRST, 0);
184         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
185                 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_XRST, 0);
186         else
187                 MOD_REG_BIT(w, DAVINCI_MCBSP_SPCR_RRST, 0);
188         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
189 }
190
191 static int davinci_i2s_startup(struct snd_pcm_substream *substream,
192                                struct snd_soc_dai *dai)
193 {
194         struct snd_soc_pcm_runtime *rtd = substream->private_data;
195         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
196         struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
197
198         cpu_dai->dma_data = dev->dma_params[substream->stream];
199
200         return 0;
201 }
202
203 #define DEFAULT_BITPERSAMPLE    16
204
205 static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
206                                    unsigned int fmt)
207 {
208         struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
209         unsigned int pcr;
210         unsigned int srgr;
211         unsigned int rcr;
212         unsigned int xcr;
213         srgr = DAVINCI_MCBSP_SRGR_FSGM |
214                 DAVINCI_MCBSP_SRGR_FPER(DEFAULT_BITPERSAMPLE * 2 - 1) |
215                 DAVINCI_MCBSP_SRGR_FWID(DEFAULT_BITPERSAMPLE - 1);
216
217         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
218         case SND_SOC_DAIFMT_CBS_CFS:
219                 /* cpu is master */
220                 pcr = DAVINCI_MCBSP_PCR_FSXM |
221                         DAVINCI_MCBSP_PCR_FSRM |
222                         DAVINCI_MCBSP_PCR_CLKXM |
223                         DAVINCI_MCBSP_PCR_CLKRM;
224                 break;
225         case SND_SOC_DAIFMT_CBM_CFS:
226                 /* McBSP CLKR pin is the input for the Sample Rate Generator.
227                  * McBSP FSR and FSX are driven by the Sample Rate Generator. */
228                 pcr = DAVINCI_MCBSP_PCR_SCLKME |
229                         DAVINCI_MCBSP_PCR_FSXM |
230                         DAVINCI_MCBSP_PCR_FSRM;
231                 break;
232         case SND_SOC_DAIFMT_CBM_CFM:
233                 /* codec is master */
234                 pcr = 0;
235                 break;
236         default:
237                 printk(KERN_ERR "%s:bad master\n", __func__);
238                 return -EINVAL;
239         }
240
241         rcr = DAVINCI_MCBSP_RCR_RFRLEN1(1);
242         xcr = DAVINCI_MCBSP_XCR_XFIG | DAVINCI_MCBSP_XCR_XFRLEN1(1);
243         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
244         case SND_SOC_DAIFMT_DSP_B:
245                 break;
246         case SND_SOC_DAIFMT_I2S:
247                 /* Davinci doesn't support TRUE I2S, but some codecs will have
248                  * the left and right channels contiguous. This allows
249                  * dsp_a mode to be used with an inverted normal frame clk.
250                  * If your codec is master and does not have contiguous
251                  * channels, then you will have sound on only one channel.
252                  * Try using a different mode, or codec as slave.
253                  *
254                  * The TLV320AIC33 is an example of a codec where this works.
255                  * It has a variable bit clock frequency allowing it to have
256                  * valid data on every bit clock.
257                  *
258                  * The TLV320AIC23 is an example of a codec where this does not
259                  * work. It has a fixed bit clock frequency with progressively
260                  * more empty bit clock slots between channels as the sample
261                  * rate is lowered.
262                  */
263                 fmt ^= SND_SOC_DAIFMT_NB_IF;
264         case SND_SOC_DAIFMT_DSP_A:
265                 rcr |= DAVINCI_MCBSP_RCR_RDATDLY(1);
266                 xcr |= DAVINCI_MCBSP_XCR_XDATDLY(1);
267                 break;
268         default:
269                 printk(KERN_ERR "%s:bad format\n", __func__);
270                 return -EINVAL;
271         }
272
273         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
274         case SND_SOC_DAIFMT_NB_NF:
275                 /* CLKRP Receive clock polarity,
276                  *      1 - sampled on rising edge of CLKR
277                  *      valid on rising edge
278                  * CLKXP Transmit clock polarity,
279                  *      1 - clocked on falling edge of CLKX
280                  *      valid on rising edge
281                  * FSRP  Receive frame sync pol, 0 - active high
282                  * FSXP  Transmit frame sync pol, 0 - active high
283                  */
284                 pcr |= (DAVINCI_MCBSP_PCR_CLKXP | DAVINCI_MCBSP_PCR_CLKRP);
285                 break;
286         case SND_SOC_DAIFMT_IB_IF:
287                 /* CLKRP Receive clock polarity,
288                  *      0 - sampled on falling edge of CLKR
289                  *      valid on falling edge
290                  * CLKXP Transmit clock polarity,
291                  *      0 - clocked on rising edge of CLKX
292                  *      valid on falling edge
293                  * FSRP  Receive frame sync pol, 1 - active low
294                  * FSXP  Transmit frame sync pol, 1 - active low
295                  */
296                 pcr |= (DAVINCI_MCBSP_PCR_FSXP | DAVINCI_MCBSP_PCR_FSRP);
297                 break;
298         case SND_SOC_DAIFMT_NB_IF:
299                 /* CLKRP Receive clock polarity,
300                  *      1 - sampled on rising edge of CLKR
301                  *      valid on rising edge
302                  * CLKXP Transmit clock polarity,
303                  *      1 - clocked on falling edge of CLKX
304                  *      valid on rising edge
305                  * FSRP  Receive frame sync pol, 1 - active low
306                  * FSXP  Transmit frame sync pol, 1 - active low
307                  */
308                 pcr |= (DAVINCI_MCBSP_PCR_CLKXP | DAVINCI_MCBSP_PCR_CLKRP |
309                         DAVINCI_MCBSP_PCR_FSXP | DAVINCI_MCBSP_PCR_FSRP);
310                 break;
311         case SND_SOC_DAIFMT_IB_NF:
312                 /* CLKRP Receive clock polarity,
313                  *      0 - sampled on falling edge of CLKR
314                  *      valid on falling edge
315                  * CLKXP Transmit clock polarity,
316                  *      0 - clocked on rising edge of CLKX
317                  *      valid on falling edge
318                  * FSRP  Receive frame sync pol, 0 - active high
319                  * FSXP  Transmit frame sync pol, 0 - active high
320                  */
321                 break;
322         default:
323                 return -EINVAL;
324         }
325         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, srgr);
326         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_PCR_REG, pcr);
327         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, rcr);
328         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, xcr);
329         return 0;
330 }
331
332 static int davinci_i2s_hw_params(struct snd_pcm_substream *substream,
333                                  struct snd_pcm_hw_params *params,
334                                  struct snd_soc_dai *dai)
335 {
336         struct snd_soc_pcm_runtime *rtd = substream->private_data;
337         struct davinci_pcm_dma_params *dma_params = rtd->dai->cpu_dai->dma_data;
338         struct davinci_mcbsp_dev *dev = rtd->dai->cpu_dai->private_data;
339         struct snd_interval *i = NULL;
340         int mcbsp_word_length;
341         u32 w;
342
343         /* general line settings */
344         w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_SPCR_REG);
345         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
346                 w |= DAVINCI_MCBSP_SPCR_RINTM(3) | DAVINCI_MCBSP_SPCR_FREE;
347                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
348         } else {
349                 w |= DAVINCI_MCBSP_SPCR_XINTM(3) | DAVINCI_MCBSP_SPCR_FREE;
350                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SPCR_REG, w);
351         }
352
353         i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS);
354         w = DAVINCI_MCBSP_SRGR_FSGM;
355         MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FWID(snd_interval_value(i) - 1), 1);
356
357         i = hw_param_interval(params, SNDRV_PCM_HW_PARAM_FRAME_BITS);
358         MOD_REG_BIT(w, DAVINCI_MCBSP_SRGR_FPER(snd_interval_value(i) - 1), 1);
359         davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_SRGR_REG, w);
360
361         /* Determine xfer data type */
362         switch (params_format(params)) {
363         case SNDRV_PCM_FORMAT_S8:
364                 dma_params->data_type = 1;
365                 mcbsp_word_length = DAVINCI_MCBSP_WORD_8;
366                 break;
367         case SNDRV_PCM_FORMAT_S16_LE:
368                 dma_params->data_type = 2;
369                 mcbsp_word_length = DAVINCI_MCBSP_WORD_16;
370                 break;
371         case SNDRV_PCM_FORMAT_S32_LE:
372                 dma_params->data_type = 4;
373                 mcbsp_word_length = DAVINCI_MCBSP_WORD_32;
374                 break;
375         default:
376                 printk(KERN_WARNING "davinci-i2s: unsupported PCM format\n");
377                 return -EINVAL;
378         }
379
380         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
381                 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_RCR_REG);
382                 MOD_REG_BIT(w, DAVINCI_MCBSP_RCR_RWDLEN1(mcbsp_word_length) |
383                                DAVINCI_MCBSP_RCR_RWDLEN2(mcbsp_word_length), 1);
384                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_RCR_REG, w);
385
386         } else {
387                 w = davinci_mcbsp_read_reg(dev, DAVINCI_MCBSP_XCR_REG);
388                 MOD_REG_BIT(w, DAVINCI_MCBSP_XCR_XWDLEN1(mcbsp_word_length) |
389                                DAVINCI_MCBSP_XCR_XWDLEN2(mcbsp_word_length), 1);
390                 davinci_mcbsp_write_reg(dev, DAVINCI_MCBSP_XCR_REG, w);
391
392         }
393         return 0;
394 }
395
396 static int davinci_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
397                                struct snd_soc_dai *dai)
398 {
399         int ret = 0;
400
401         switch (cmd) {
402         case SNDRV_PCM_TRIGGER_START:
403         case SNDRV_PCM_TRIGGER_RESUME:
404         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
405                 davinci_mcbsp_start(substream);
406                 break;
407         case SNDRV_PCM_TRIGGER_STOP:
408         case SNDRV_PCM_TRIGGER_SUSPEND:
409         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
410                 davinci_mcbsp_stop(substream);
411                 break;
412         default:
413                 ret = -EINVAL;
414         }
415
416         return ret;
417 }
418
419 static int davinci_i2s_probe(struct platform_device *pdev,
420                              struct snd_soc_dai *dai)
421 {
422         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
423         struct snd_soc_card *card = socdev->card;
424         struct snd_soc_dai *cpu_dai = card->dai_link[pdev->id].cpu_dai;
425         struct davinci_mcbsp_dev *dev;
426         struct resource *mem, *ioarea;
427         struct evm_snd_platform_data *pdata;
428         int ret;
429
430         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
431         if (!mem) {
432                 dev_err(&pdev->dev, "no mem resource?\n");
433                 return -ENODEV;
434         }
435
436         ioarea = request_mem_region(mem->start, (mem->end - mem->start) + 1,
437                                     pdev->name);
438         if (!ioarea) {
439                 dev_err(&pdev->dev, "McBSP region already claimed\n");
440                 return -EBUSY;
441         }
442
443         dev = kzalloc(sizeof(struct davinci_mcbsp_dev), GFP_KERNEL);
444         if (!dev) {
445                 ret = -ENOMEM;
446                 goto err_release_region;
447         }
448
449         cpu_dai->private_data = dev;
450
451         dev->clk = clk_get(&pdev->dev, "McBSPCLK");
452         if (IS_ERR(dev->clk)) {
453                 ret = -ENODEV;
454                 goto err_free_mem;
455         }
456         clk_enable(dev->clk);
457
458         dev->base = (void __iomem *)IO_ADDRESS(mem->start);
459         pdata = pdev->dev.platform_data;
460
461         dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK] = &davinci_i2s_pcm_out;
462         dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->channel = pdata->tx_dma_ch;
463         dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK]->dma_addr =
464             (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DXR_REG);
465
466         dev->dma_params[SNDRV_PCM_STREAM_CAPTURE] = &davinci_i2s_pcm_in;
467         dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->channel = pdata->rx_dma_ch;
468         dev->dma_params[SNDRV_PCM_STREAM_CAPTURE]->dma_addr =
469             (dma_addr_t)(io_v2p(dev->base) + DAVINCI_MCBSP_DRR_REG);
470
471         return 0;
472
473 err_free_mem:
474         kfree(dev);
475 err_release_region:
476         release_mem_region(mem->start, (mem->end - mem->start) + 1);
477
478         return ret;
479 }
480
481 static void davinci_i2s_remove(struct platform_device *pdev,
482                                struct snd_soc_dai *dai)
483 {
484         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
485         struct snd_soc_card *card = socdev->card;
486         struct snd_soc_dai *cpu_dai = card->dai_link[pdev->id].cpu_dai;
487         struct davinci_mcbsp_dev *dev = cpu_dai->private_data;
488         struct resource *mem;
489
490         clk_disable(dev->clk);
491         clk_put(dev->clk);
492         dev->clk = NULL;
493
494         kfree(dev);
495
496         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
497         release_mem_region(mem->start, (mem->end - mem->start) + 1);
498 }
499
500 #define DAVINCI_I2S_RATES       SNDRV_PCM_RATE_8000_96000
501
502 struct snd_soc_dai davinci_i2s_dai = {
503         .name = "davinci-i2s",
504         .id = 0,
505         .probe = davinci_i2s_probe,
506         .remove = davinci_i2s_remove,
507         .playback = {
508                 .channels_min = 2,
509                 .channels_max = 2,
510                 .rates = DAVINCI_I2S_RATES,
511                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
512         .capture = {
513                 .channels_min = 2,
514                 .channels_max = 2,
515                 .rates = DAVINCI_I2S_RATES,
516                 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
517         .ops = {
518                 .startup = davinci_i2s_startup,
519                 .trigger = davinci_i2s_trigger,
520                 .hw_params = davinci_i2s_hw_params,
521                 .set_fmt = davinci_i2s_set_dai_fmt,
522         },
523 };
524 EXPORT_SYMBOL_GPL(davinci_i2s_dai);
525
526 static int __init davinci_i2s_init(void)
527 {
528         return snd_soc_register_dai(&davinci_i2s_dai);
529 }
530 module_init(davinci_i2s_init);
531
532 static void __exit davinci_i2s_exit(void)
533 {
534         snd_soc_unregister_dai(&davinci_i2s_dai);
535 }
536 module_exit(davinci_i2s_exit);
537
538 MODULE_AUTHOR("Vladimir Barinov");
539 MODULE_DESCRIPTION("TI DAVINCI I2S (McBSP) SoC Interface");
540 MODULE_LICENSE("GPL");