ASoC: core: Remove useless kfree
[linux-3.10.git] / sound / soc / s6000 / s6000-i2s.c
1 /*
2  * ALSA SoC I2S Audio Layer for the Stretch 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/init.h>
13 #include <linux/module.h>
14 #include <linux/device.h>
15 #include <linux/delay.h>
16 #include <linux/clk.h>
17 #include <linux/interrupt.h>
18 #include <linux/io.h>
19 #include <linux/slab.h>
20
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/initval.h>
25 #include <sound/soc.h>
26
27 #include "s6000-i2s.h"
28 #include "s6000-pcm.h"
29
30 struct s6000_i2s_dev {
31         dma_addr_t sifbase;
32         u8 __iomem *scbbase;
33         unsigned int wide;
34         unsigned int channel_in;
35         unsigned int channel_out;
36         unsigned int lines_in;
37         unsigned int lines_out;
38         struct s6000_pcm_dma_params dma_params;
39 };
40
41 #define S6_I2S_INTERRUPT_STATUS 0x00
42 #define   S6_I2S_INT_OVERRUN    1
43 #define   S6_I2S_INT_UNDERRUN   2
44 #define   S6_I2S_INT_ALIGNMENT  4
45 #define S6_I2S_INTERRUPT_ENABLE 0x04
46 #define S6_I2S_INTERRUPT_RAW    0x08
47 #define S6_I2S_INTERRUPT_CLEAR  0x0C
48 #define S6_I2S_INTERRUPT_SET    0x10
49 #define S6_I2S_MODE             0x20
50 #define   S6_I2S_DUAL           0
51 #define   S6_I2S_WIDE           1
52 #define S6_I2S_TX_DEFAULT       0x24
53 #define S6_I2S_DATA_CFG(c)      (0x40 + 0x10 * (c))
54 #define   S6_I2S_IN             0
55 #define   S6_I2S_OUT            1
56 #define   S6_I2S_UNUSED         2
57 #define S6_I2S_INTERFACE_CFG(c) (0x44 + 0x10 * (c))
58 #define   S6_I2S_DIV_MASK       0x001fff
59 #define   S6_I2S_16BIT          0x000000
60 #define   S6_I2S_20BIT          0x002000
61 #define   S6_I2S_24BIT          0x004000
62 #define   S6_I2S_32BIT          0x006000
63 #define   S6_I2S_BITS_MASK      0x006000
64 #define   S6_I2S_MEM_16BIT      0x000000
65 #define   S6_I2S_MEM_32BIT      0x008000
66 #define   S6_I2S_MEM_MASK       0x008000
67 #define   S6_I2S_CHANNELS_SHIFT 16
68 #define   S6_I2S_CHANNELS_MASK  0x030000
69 #define   S6_I2S_SCK_IN         0x000000
70 #define   S6_I2S_SCK_OUT        0x040000
71 #define   S6_I2S_SCK_DIR        0x040000
72 #define   S6_I2S_WS_IN          0x000000
73 #define   S6_I2S_WS_OUT         0x080000
74 #define   S6_I2S_WS_DIR         0x080000
75 #define   S6_I2S_LEFT_FIRST     0x000000
76 #define   S6_I2S_RIGHT_FIRST    0x100000
77 #define   S6_I2S_FIRST          0x100000
78 #define   S6_I2S_CUR_SCK        0x200000
79 #define   S6_I2S_CUR_WS         0x400000
80 #define S6_I2S_ENABLE(c)        (0x48 + 0x10 * (c))
81 #define   S6_I2S_DISABLE_IF     0x02
82 #define   S6_I2S_ENABLE_IF      0x03
83 #define   S6_I2S_IS_BUSY        0x04
84 #define   S6_I2S_DMA_ACTIVE     0x08
85 #define   S6_I2S_IS_ENABLED     0x10
86
87 #define S6_I2S_NUM_LINES        4
88
89 #define S6_I2S_SIF_PORT0        0x0000000
90 #define S6_I2S_SIF_PORT1        0x0000080 /* docs say 0x0000010 */
91
92 static inline void s6_i2s_write_reg(struct s6000_i2s_dev *dev, int reg, u32 val)
93 {
94         writel(val, dev->scbbase + reg);
95 }
96
97 static inline u32 s6_i2s_read_reg(struct s6000_i2s_dev *dev, int reg)
98 {
99         return readl(dev->scbbase + reg);
100 }
101
102 static inline void s6_i2s_mod_reg(struct s6000_i2s_dev *dev, int reg,
103                                   u32 mask, u32 val)
104 {
105         val ^= s6_i2s_read_reg(dev, reg) & ~mask;
106         s6_i2s_write_reg(dev, reg, val);
107 }
108
109 static void s6000_i2s_start_channel(struct s6000_i2s_dev *dev, int channel)
110 {
111         int i, j, cur, prev;
112
113         /*
114          * Wait for WCLK to toggle 5 times before enabling the channel
115          * s6000 Family Datasheet 3.6.4:
116          *   "At least two cycles of WS must occur between commands
117          *    to disable or enable the interface"
118          */
119         j = 0;
120         prev = ~S6_I2S_CUR_WS;
121         for (i = 1000000; --i && j < 6; ) {
122                 cur = s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(channel))
123                        & S6_I2S_CUR_WS;
124                 if (prev != cur) {
125                         prev = cur;
126                         j++;
127                 }
128         }
129         if (j < 6)
130                 printk(KERN_WARNING "s6000-i2s: timeout waiting for WCLK\n");
131
132         s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_ENABLE_IF);
133 }
134
135 static void s6000_i2s_stop_channel(struct s6000_i2s_dev *dev, int channel)
136 {
137         s6_i2s_write_reg(dev, S6_I2S_ENABLE(channel), S6_I2S_DISABLE_IF);
138 }
139
140 static void s6000_i2s_start(struct snd_pcm_substream *substream)
141 {
142         struct snd_soc_pcm_runtime *rtd = substream->private_data;
143         struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
144         int channel;
145
146         channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
147                         dev->channel_out : dev->channel_in;
148
149         s6000_i2s_start_channel(dev, channel);
150 }
151
152 static void s6000_i2s_stop(struct snd_pcm_substream *substream)
153 {
154         struct snd_soc_pcm_runtime *rtd = substream->private_data;
155         struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(rtd->cpu_dai);
156         int channel;
157
158         channel = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
159                         dev->channel_out : dev->channel_in;
160
161         s6000_i2s_stop_channel(dev, channel);
162 }
163
164 static int s6000_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
165                              int after)
166 {
167         switch (cmd) {
168         case SNDRV_PCM_TRIGGER_START:
169         case SNDRV_PCM_TRIGGER_RESUME:
170         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
171                 if ((substream->stream == SNDRV_PCM_STREAM_CAPTURE) ^ !after)
172                         s6000_i2s_start(substream);
173                 break;
174         case SNDRV_PCM_TRIGGER_STOP:
175         case SNDRV_PCM_TRIGGER_SUSPEND:
176         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
177                 if (!after)
178                         s6000_i2s_stop(substream);
179         }
180         return 0;
181 }
182
183 static unsigned int s6000_i2s_int_sources(struct s6000_i2s_dev *dev)
184 {
185         unsigned int pending;
186         pending = s6_i2s_read_reg(dev, S6_I2S_INTERRUPT_RAW);
187         pending &= S6_I2S_INT_ALIGNMENT |
188                    S6_I2S_INT_UNDERRUN |
189                    S6_I2S_INT_OVERRUN;
190         s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR, pending);
191
192         return pending;
193 }
194
195 static unsigned int s6000_i2s_check_xrun(struct snd_soc_dai *cpu_dai)
196 {
197         struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
198         unsigned int errors;
199         unsigned int ret;
200
201         errors = s6000_i2s_int_sources(dev);
202         if (likely(!errors))
203                 return 0;
204
205         ret = 0;
206         if (errors & S6_I2S_INT_ALIGNMENT)
207                 printk(KERN_ERR "s6000-i2s: WCLK misaligned\n");
208         if (errors & S6_I2S_INT_UNDERRUN)
209                 ret |= 1 << SNDRV_PCM_STREAM_PLAYBACK;
210         if (errors & S6_I2S_INT_OVERRUN)
211                 ret |= 1 << SNDRV_PCM_STREAM_CAPTURE;
212         return ret;
213 }
214
215 static void s6000_i2s_wait_disabled(struct s6000_i2s_dev *dev)
216 {
217         int channel;
218         int n = 50;
219         for (channel = 0; channel < 2; channel++) {
220                 while (--n >= 0) {
221                         int v = s6_i2s_read_reg(dev, S6_I2S_ENABLE(channel));
222                         if ((v & S6_I2S_IS_ENABLED)
223                             || !(v & (S6_I2S_DMA_ACTIVE | S6_I2S_IS_BUSY)))
224                                 break;
225                         udelay(20);
226                 }
227         }
228         if (n < 0)
229                 printk(KERN_WARNING "s6000-i2s: timeout disabling interfaces");
230 }
231
232 static int s6000_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
233                                    unsigned int fmt)
234 {
235         struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
236         u32 w;
237
238         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
239         case SND_SOC_DAIFMT_CBM_CFM:
240                 w = S6_I2S_SCK_IN | S6_I2S_WS_IN;
241                 break;
242         case SND_SOC_DAIFMT_CBS_CFM:
243                 w = S6_I2S_SCK_OUT | S6_I2S_WS_IN;
244                 break;
245         case SND_SOC_DAIFMT_CBM_CFS:
246                 w = S6_I2S_SCK_IN | S6_I2S_WS_OUT;
247                 break;
248         case SND_SOC_DAIFMT_CBS_CFS:
249                 w = S6_I2S_SCK_OUT | S6_I2S_WS_OUT;
250                 break;
251         default:
252                 return -EINVAL;
253         }
254
255         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
256         case SND_SOC_DAIFMT_NB_NF:
257                 w |= S6_I2S_LEFT_FIRST;
258                 break;
259         case SND_SOC_DAIFMT_NB_IF:
260                 w |= S6_I2S_RIGHT_FIRST;
261                 break;
262         default:
263                 return -EINVAL;
264         }
265
266         s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(0),
267                        S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w);
268         s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(1),
269                        S6_I2S_FIRST | S6_I2S_WS_DIR | S6_I2S_SCK_DIR, w);
270
271         return 0;
272 }
273
274 static int s6000_i2s_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
275 {
276         struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
277
278         if (!div || (div & 1) || div > (S6_I2S_DIV_MASK + 1) * 2)
279                 return -EINVAL;
280
281         s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(div_id),
282                        S6_I2S_DIV_MASK, div / 2 - 1);
283         return 0;
284 }
285
286 static int s6000_i2s_hw_params(struct snd_pcm_substream *substream,
287                                struct snd_pcm_hw_params *params,
288                                struct snd_soc_dai *dai)
289 {
290         struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
291         int interf;
292         u32 w = 0;
293
294         if (dev->wide)
295                 interf = 0;
296         else {
297                 w |= (((params_channels(params) - 2) / 2)
298                       << S6_I2S_CHANNELS_SHIFT) & S6_I2S_CHANNELS_MASK;
299                 interf = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
300                                 ? dev->channel_out : dev->channel_in;
301         }
302
303         switch (params_format(params)) {
304         case SNDRV_PCM_FORMAT_S16_LE:
305                 w |= S6_I2S_16BIT | S6_I2S_MEM_16BIT;
306                 break;
307         case SNDRV_PCM_FORMAT_S32_LE:
308                 w |= S6_I2S_32BIT | S6_I2S_MEM_32BIT;
309                 break;
310         default:
311                 printk(KERN_WARNING "s6000-i2s: unsupported PCM format %x\n",
312                        params_format(params));
313                 return -EINVAL;
314         }
315
316         if (s6_i2s_read_reg(dev, S6_I2S_INTERFACE_CFG(interf))
317              & S6_I2S_IS_ENABLED) {
318                 printk(KERN_ERR "s6000-i2s: interface already enabled\n");
319                 return -EBUSY;
320         }
321
322         s6_i2s_mod_reg(dev, S6_I2S_INTERFACE_CFG(interf),
323                        S6_I2S_CHANNELS_MASK|S6_I2S_MEM_MASK|S6_I2S_BITS_MASK,
324                        w);
325
326         return 0;
327 }
328
329 static int s6000_i2s_dai_probe(struct snd_soc_dai *dai)
330 {
331         struct s6000_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
332         struct s6000_snd_platform_data *pdata = dai->dev->platform_data;
333
334         if (!pdata)
335                 return -EINVAL;
336
337         dai->capture_dma_data = &dev->dma_params;
338         dai->playback_dma_data = &dev->dma_params;
339
340         dev->wide = pdata->wide;
341         dev->channel_in = pdata->channel_in;
342         dev->channel_out = pdata->channel_out;
343         dev->lines_in = pdata->lines_in;
344         dev->lines_out = pdata->lines_out;
345
346         s6_i2s_write_reg(dev, S6_I2S_MODE,
347                          dev->wide ? S6_I2S_WIDE : S6_I2S_DUAL);
348
349         if (dev->wide) {
350                 int i;
351
352                 if (dev->lines_in + dev->lines_out > S6_I2S_NUM_LINES)
353                         return -EINVAL;
354
355                 dev->channel_in = 0;
356                 dev->channel_out = 1;
357                 dai->driver->capture.channels_min = 2 * dev->lines_in;
358                 dai->driver->capture.channels_max = dai->driver->capture.channels_min;
359                 dai->driver->playback.channels_min = 2 * dev->lines_out;
360                 dai->driver->playback.channels_max = dai->driver->playback.channels_min;
361
362                 for (i = 0; i < dev->lines_out; i++)
363                         s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_OUT);
364
365                 for (; i < S6_I2S_NUM_LINES - dev->lines_in; i++)
366                         s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i),
367                                          S6_I2S_UNUSED);
368
369                 for (; i < S6_I2S_NUM_LINES; i++)
370                         s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(i), S6_I2S_IN);
371         } else {
372                 unsigned int cfg[2] = {S6_I2S_UNUSED, S6_I2S_UNUSED};
373
374                 if (dev->lines_in > 1 || dev->lines_out > 1)
375                         return -EINVAL;
376
377                 dai->driver->capture.channels_min = 2 * dev->lines_in;
378                 dai->driver->capture.channels_max = 8 * dev->lines_in;
379                 dai->driver->playback.channels_min = 2 * dev->lines_out;
380                 dai->driver->playback.channels_max = 8 * dev->lines_out;
381
382                 if (dev->lines_in)
383                         cfg[dev->channel_in] = S6_I2S_IN;
384                 if (dev->lines_out)
385                         cfg[dev->channel_out] = S6_I2S_OUT;
386
387                 s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(0), cfg[0]);
388                 s6_i2s_write_reg(dev, S6_I2S_DATA_CFG(1), cfg[1]);
389         }
390
391         if (dev->lines_out) {
392                 if (dev->lines_in) {
393                         if (!dev->dma_params.dma_out)
394                                 return -ENODEV;
395                 } else {
396                         dev->dma_params.dma_out = dev->dma_params.dma_in;
397                         dev->dma_params.dma_in = 0;
398                 }
399         }
400         dev->dma_params.sif_in = dev->sifbase + (dev->channel_in ?
401                                         S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0);
402         dev->dma_params.sif_out = dev->sifbase + (dev->channel_out ?
403                                         S6_I2S_SIF_PORT1 : S6_I2S_SIF_PORT0);
404         dev->dma_params.same_rate = pdata->same_rate | pdata->wide;
405         return 0;
406 }
407
408 #define S6000_I2S_RATES (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_5512 | \
409                          SNDRV_PCM_RATE_8000_192000)
410 #define S6000_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
411
412 static const struct snd_soc_dai_ops s6000_i2s_dai_ops = {
413         .set_fmt = s6000_i2s_set_dai_fmt,
414         .set_clkdiv = s6000_i2s_set_clkdiv,
415         .hw_params = s6000_i2s_hw_params,
416 };
417
418 static struct snd_soc_dai_driver s6000_i2s_dai = {
419         .probe = s6000_i2s_dai_probe,
420         .playback = {
421                 .channels_min = 2,
422                 .channels_max = 8,
423                 .formats = S6000_I2S_FORMATS,
424                 .rates = S6000_I2S_RATES,
425                 .rate_min = 0,
426                 .rate_max = 1562500,
427         },
428         .capture = {
429                 .channels_min = 2,
430                 .channels_max = 8,
431                 .formats = S6000_I2S_FORMATS,
432                 .rates = S6000_I2S_RATES,
433                 .rate_min = 0,
434                 .rate_max = 1562500,
435         },
436         .ops = &s6000_i2s_dai_ops,
437 };
438
439 static int __devinit s6000_i2s_probe(struct platform_device *pdev)
440 {
441         struct s6000_i2s_dev *dev;
442         struct resource *scbmem, *sifmem, *region, *dma1, *dma2;
443         u8 __iomem *mmio;
444         int ret;
445
446         scbmem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
447         if (!scbmem) {
448                 dev_err(&pdev->dev, "no mem resource?\n");
449                 ret = -ENODEV;
450                 goto err_release_none;
451         }
452
453         region = request_mem_region(scbmem->start, resource_size(scbmem),
454                                                                 pdev->name);
455         if (!region) {
456                 dev_err(&pdev->dev, "I2S SCB region already claimed\n");
457                 ret = -EBUSY;
458                 goto err_release_none;
459         }
460
461         mmio = ioremap(scbmem->start, resource_size(scbmem));
462         if (!mmio) {
463                 dev_err(&pdev->dev, "can't ioremap SCB region\n");
464                 ret = -ENOMEM;
465                 goto err_release_scb;
466         }
467
468         sifmem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
469         if (!sifmem) {
470                 dev_err(&pdev->dev, "no second mem resource?\n");
471                 ret = -ENODEV;
472                 goto err_release_map;
473         }
474
475         region = request_mem_region(sifmem->start, resource_size(sifmem),
476                                                                 pdev->name);
477         if (!region) {
478                 dev_err(&pdev->dev, "I2S SIF region already claimed\n");
479                 ret = -EBUSY;
480                 goto err_release_map;
481         }
482
483         dma1 = platform_get_resource(pdev, IORESOURCE_DMA, 0);
484         if (!dma1) {
485                 dev_err(&pdev->dev, "no dma resource?\n");
486                 ret = -ENODEV;
487                 goto err_release_sif;
488         }
489
490         region = request_mem_region(dma1->start, resource_size(dma1),
491                                                                 pdev->name);
492         if (!region) {
493                 dev_err(&pdev->dev, "I2S DMA region already claimed\n");
494                 ret = -EBUSY;
495                 goto err_release_sif;
496         }
497
498         dma2 = platform_get_resource(pdev, IORESOURCE_DMA, 1);
499         if (dma2) {
500                 region = request_mem_region(dma2->start, resource_size(dma2),
501                                                                 pdev->name);
502                 if (!region) {
503                         dev_err(&pdev->dev,
504                                 "I2S DMA region already claimed\n");
505                         ret = -EBUSY;
506                         goto err_release_dma1;
507                 }
508         }
509
510         dev = kzalloc(sizeof(struct s6000_i2s_dev), GFP_KERNEL);
511         if (!dev) {
512                 ret = -ENOMEM;
513                 goto err_release_dma2;
514         }
515         dev_set_drvdata(&pdev->dev, dev);
516
517         dev->sifbase = sifmem->start;
518         dev->scbbase = mmio;
519
520         s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0);
521         s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_CLEAR,
522                          S6_I2S_INT_ALIGNMENT |
523                          S6_I2S_INT_UNDERRUN |
524                          S6_I2S_INT_OVERRUN);
525
526         s6000_i2s_stop_channel(dev, 0);
527         s6000_i2s_stop_channel(dev, 1);
528         s6000_i2s_wait_disabled(dev);
529
530         dev->dma_params.check_xrun = s6000_i2s_check_xrun;
531         dev->dma_params.trigger = s6000_i2s_trigger;
532         dev->dma_params.dma_in = dma1->start;
533         dev->dma_params.dma_out = dma2 ? dma2->start : 0;
534         dev->dma_params.irq = platform_get_irq(pdev, 0);
535         if (dev->dma_params.irq < 0) {
536                 dev_err(&pdev->dev, "no irq resource?\n");
537                 ret = -ENODEV;
538                 goto err_release_dev;
539         }
540
541         s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE,
542                          S6_I2S_INT_ALIGNMENT |
543                          S6_I2S_INT_UNDERRUN |
544                          S6_I2S_INT_OVERRUN);
545
546         ret = snd_soc_register_dai(&pdev->dev, &s6000_i2s_dai);
547         if (ret)
548                 goto err_release_dev;
549
550         return 0;
551
552 err_release_dev:
553         kfree(dev);
554 err_release_dma2:
555         if (dma2)
556                 release_mem_region(dma2->start, resource_size(dma2));
557 err_release_dma1:
558         release_mem_region(dma1->start, resource_size(dma1));
559 err_release_sif:
560         release_mem_region(sifmem->start, resource_size(sifmem));
561 err_release_map:
562         iounmap(mmio);
563 err_release_scb:
564         release_mem_region(scbmem->start, resource_size(scbmem));
565 err_release_none:
566         return ret;
567 }
568
569 static void __devexit s6000_i2s_remove(struct platform_device *pdev)
570 {
571         struct s6000_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
572         struct resource *region;
573         void __iomem *mmio = dev->scbbase;
574
575         snd_soc_unregister_dai(&pdev->dev);
576
577         s6000_i2s_stop_channel(dev, 0);
578         s6000_i2s_stop_channel(dev, 1);
579
580         s6_i2s_write_reg(dev, S6_I2S_INTERRUPT_ENABLE, 0);
581         kfree(dev);
582
583         region = platform_get_resource(pdev, IORESOURCE_DMA, 0);
584         release_mem_region(region->start, resource_size(region));
585
586         region = platform_get_resource(pdev, IORESOURCE_DMA, 1);
587         if (region)
588                 release_mem_region(region->start, resource_size(region));
589
590         region = platform_get_resource(pdev, IORESOURCE_MEM, 0);
591         release_mem_region(region->start, resource_size(region));
592
593         iounmap(mmio);
594         region = platform_get_resource(pdev, IORESOURCE_IO, 0);
595         release_mem_region(region->start, resource_size(region));
596 }
597
598 static struct platform_driver s6000_i2s_driver = {
599         .probe  = s6000_i2s_probe,
600         .remove = __devexit_p(s6000_i2s_remove),
601         .driver = {
602                 .name   = "s6000-i2s",
603                 .owner  = THIS_MODULE,
604         },
605 };
606
607 module_platform_driver(s6000_i2s_driver);
608
609 MODULE_AUTHOR("Daniel Gloeckner");
610 MODULE_DESCRIPTION("Stretch s6000 family I2S SoC Interface");
611 MODULE_LICENSE("GPL");