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authorapatard@mandriva.com <apatard@mandriva.com>2010-05-31 07:49:14 -0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2010-05-31 08:16:37 -0400
commitf9b95980f87f021f8c69646738929189838ad035 (patch)
tree99ea04355647ccf423786804ddb56131d618c448 /sound/soc/kirkwood/kirkwood-i2s.c
parent492e2bf141478e2c1ce3abfda381f73d1f2108f5 (diff)
ASoC: kirkwood: Add i2s support
This patch enables support for the i2s controller available on kirkwood platforms Signed-off-by: Arnaud Patard <apatard@mandriva.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/kirkwood/kirkwood-i2s.c')
-rw-r--r--sound/soc/kirkwood/kirkwood-i2s.c485
1 files changed, 485 insertions, 0 deletions
diff --git a/sound/soc/kirkwood/kirkwood-i2s.c b/sound/soc/kirkwood/kirkwood-i2s.c
new file mode 100644
index 000000000000..0adc59778d5a
--- /dev/null
+++ b/sound/soc/kirkwood/kirkwood-i2s.c
@@ -0,0 +1,485 @@
1/*
2 * kirkwood-i2s.c
3 *
4 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 */
11
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/platform_device.h>
15#include <linux/io.h>
16#include <linux/slab.h>
17#include <linux/mbus.h>
18#include <linux/delay.h>
19#include <sound/pcm.h>
20#include <sound/pcm_params.h>
21#include <sound/soc.h>
22#include <plat/audio.h>
23#include "kirkwood-i2s.h"
24#include "kirkwood.h"
25
26#define DRV_NAME "kirkwood-i2s"
27
28#define KIRKWOOD_I2S_RATES \
29 (SNDRV_PCM_RATE_44100 | \
30 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000)
31#define KIRKWOOD_I2S_FORMATS \
32 (SNDRV_PCM_FMTBIT_S16_LE | \
33 SNDRV_PCM_FMTBIT_S24_LE | \
34 SNDRV_PCM_FMTBIT_S32_LE)
35
36
37struct snd_soc_dai kirkwood_i2s_dai;
38static struct kirkwood_dma_data *priv;
39
40static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
41 unsigned int fmt)
42{
43 unsigned long mask;
44 unsigned long value;
45
46 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
47 case SND_SOC_DAIFMT_RIGHT_J:
48 mask = KIRKWOOD_I2S_CTL_RJ;
49 break;
50 case SND_SOC_DAIFMT_LEFT_J:
51 mask = KIRKWOOD_I2S_CTL_LJ;
52 break;
53 case SND_SOC_DAIFMT_I2S:
54 mask = KIRKWOOD_I2S_CTL_I2S;
55 break;
56 default:
57 return -EINVAL;
58 }
59
60 /*
61 * Set same format for playback and record
62 * This avoids some troubles.
63 */
64 value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
65 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
66 value |= mask;
67 writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
68
69 value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
70 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
71 value |= mask;
72 writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
73
74 return 0;
75}
76
77static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
78{
79 unsigned long value;
80
81 value = KIRKWOOD_DCO_CTL_OFFSET_0;
82 switch (rate) {
83 default:
84 case 44100:
85 value |= KIRKWOOD_DCO_CTL_FREQ_11;
86 break;
87 case 48000:
88 value |= KIRKWOOD_DCO_CTL_FREQ_12;
89 break;
90 case 96000:
91 value |= KIRKWOOD_DCO_CTL_FREQ_24;
92 break;
93 }
94 writel(value, io + KIRKWOOD_DCO_CTL);
95
96 /* wait for dco locked */
97 do {
98 cpu_relax();
99 value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
100 value &= KIRKWOOD_DCO_SPCR_STATUS;
101 } while (value == 0);
102}
103
104static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
105 struct snd_pcm_hw_params *params,
106 struct snd_soc_dai *dai)
107{
108 unsigned int i2s_reg, reg;
109 unsigned long i2s_value, value;
110
111 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
112 i2s_reg = KIRKWOOD_I2S_PLAYCTL;
113 reg = KIRKWOOD_PLAYCTL;
114 } else {
115 i2s_reg = KIRKWOOD_I2S_RECCTL;
116 reg = KIRKWOOD_RECCTL;
117 }
118
119 /* set dco conf */
120 kirkwood_set_dco(priv->io, params_rate(params));
121
122 i2s_value = readl(priv->io+i2s_reg);
123 i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
124
125 value = readl(priv->io+reg);
126 value &= ~KIRKWOOD_PLAYCTL_SIZE_MASK;
127
128 /*
129 * Size settings in play/rec i2s control regs and play/rec control
130 * regs must be the same.
131 */
132 switch (params_format(params)) {
133 case SNDRV_PCM_FORMAT_S16_LE:
134 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
135 value |= KIRKWOOD_PLAYCTL_SIZE_16_C;
136 break;
137 /*
138 * doesn't work... S20_3LE != kirkwood 20bit format ?
139 *
140 case SNDRV_PCM_FORMAT_S20_3LE:
141 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
142 value |= KIRKWOOD_PLAYCTL_SIZE_20;
143 break;
144 */
145 case SNDRV_PCM_FORMAT_S24_LE:
146 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
147 value |= KIRKWOOD_PLAYCTL_SIZE_24;
148 break;
149 case SNDRV_PCM_FORMAT_S32_LE:
150 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
151 value |= KIRKWOOD_PLAYCTL_SIZE_32;
152 break;
153 default:
154 return -EINVAL;
155 }
156 writel(i2s_value, priv->io+i2s_reg);
157 writel(value, priv->io+reg);
158
159 return 0;
160}
161
162static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
163 int cmd, struct snd_soc_dai *dai)
164{
165 unsigned long value;
166
167 /*
168 * specs says KIRKWOOD_PLAYCTL must be read 2 times before
169 * changing it. So read 1 time here and 1 later.
170 */
171 value = readl(priv->io + KIRKWOOD_PLAYCTL);
172
173 switch (cmd) {
174 case SNDRV_PCM_TRIGGER_START:
175 /* stop audio, enable interrupts */
176 value = readl(priv->io + KIRKWOOD_PLAYCTL);
177 value |= KIRKWOOD_PLAYCTL_PAUSE;
178 writel(value, priv->io + KIRKWOOD_PLAYCTL);
179
180 value = readl(priv->io + KIRKWOOD_INT_MASK);
181 value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
182 writel(value, priv->io + KIRKWOOD_INT_MASK);
183
184 /* configure audio & enable i2s playback */
185 value = readl(priv->io + KIRKWOOD_PLAYCTL);
186 value &= ~KIRKWOOD_PLAYCTL_BURST_MASK;
187 value &= ~(KIRKWOOD_PLAYCTL_PAUSE|KIRKWOOD_PLAYCTL_SPDIF_EN);
188
189 if (priv->burst == 32)
190 value |= KIRKWOOD_PLAYCTL_BURST_32;
191 else
192 value |= KIRKWOOD_PLAYCTL_BURST_128;
193 value |= KIRKWOOD_PLAYCTL_I2S_EN;
194 writel(value, priv->io + KIRKWOOD_PLAYCTL);
195 break;
196
197 case SNDRV_PCM_TRIGGER_STOP:
198 /* stop audio, disable interrupts */
199 value = readl(priv->io + KIRKWOOD_PLAYCTL);
200 value |= KIRKWOOD_PLAYCTL_PAUSE;
201 writel(value, priv->io + KIRKWOOD_PLAYCTL);
202
203 value = readl(priv->io + KIRKWOOD_INT_MASK);
204 value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
205 writel(value, priv->io + KIRKWOOD_INT_MASK);
206
207 /* disable all playbacks */
208 value = readl(priv->io + KIRKWOOD_PLAYCTL);
209 value &= ~(KIRKWOOD_PLAYCTL_I2S_EN | KIRKWOOD_PLAYCTL_SPDIF_EN);
210 writel(value, priv->io + KIRKWOOD_PLAYCTL);
211 break;
212
213 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
214 case SNDRV_PCM_TRIGGER_SUSPEND:
215 value = readl(priv->io + KIRKWOOD_PLAYCTL);
216 value |= KIRKWOOD_PLAYCTL_PAUSE;
217 writel(value, priv->io + KIRKWOOD_PLAYCTL);
218 break;
219
220 case SNDRV_PCM_TRIGGER_RESUME:
221 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
222 value = readl(priv->io + KIRKWOOD_PLAYCTL);
223 value &= ~KIRKWOOD_PLAYCTL_PAUSE;
224 writel(value, priv->io + KIRKWOOD_PLAYCTL);
225 break;
226
227 default:
228 return -EINVAL;
229 }
230
231 return 0;
232}
233
234static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
235 int cmd, struct snd_soc_dai *dai)
236{
237 unsigned long value;
238
239 value = readl(priv->io + KIRKWOOD_RECCTL);
240
241 switch (cmd) {
242 case SNDRV_PCM_TRIGGER_START:
243 /* stop audio, enable interrupts */
244 value = readl(priv->io + KIRKWOOD_RECCTL);
245 value |= KIRKWOOD_RECCTL_PAUSE;
246 writel(value, priv->io + KIRKWOOD_RECCTL);
247
248 value = readl(priv->io + KIRKWOOD_INT_MASK);
249 value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
250 writel(value, priv->io + KIRKWOOD_INT_MASK);
251
252 /* configure audio & enable i2s record */
253 value = readl(priv->io + KIRKWOOD_RECCTL);
254 value &= ~KIRKWOOD_RECCTL_BURST_MASK;
255 value &= ~KIRKWOOD_RECCTL_MONO;
256 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_SPDIF_EN);
257
258 if (priv->burst == 32)
259 value |= KIRKWOOD_RECCTL_BURST_32;
260 else
261 value |= KIRKWOOD_RECCTL_BURST_128;
262 value |= KIRKWOOD_RECCTL_I2S_EN;
263
264 writel(value, priv->io + KIRKWOOD_RECCTL);
265 break;
266
267 case SNDRV_PCM_TRIGGER_STOP:
268 /* stop audio, disable interrupts */
269 value = readl(priv->io + KIRKWOOD_RECCTL);
270 value |= KIRKWOOD_RECCTL_PAUSE;
271 writel(value, priv->io + KIRKWOOD_RECCTL);
272
273 value = readl(priv->io + KIRKWOOD_INT_MASK);
274 value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
275 writel(value, priv->io + KIRKWOOD_INT_MASK);
276
277 /* disable all records */
278 value = readl(priv->io + KIRKWOOD_RECCTL);
279 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
280 writel(value, priv->io + KIRKWOOD_RECCTL);
281 break;
282
283 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
284 case SNDRV_PCM_TRIGGER_SUSPEND:
285 value = readl(priv->io + KIRKWOOD_RECCTL);
286 value |= KIRKWOOD_RECCTL_PAUSE;
287 writel(value, priv->io + KIRKWOOD_RECCTL);
288 break;
289
290 case SNDRV_PCM_TRIGGER_RESUME:
291 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
292 value = readl(priv->io + KIRKWOOD_RECCTL);
293 value &= ~KIRKWOOD_RECCTL_PAUSE;
294 writel(value, priv->io + KIRKWOOD_RECCTL);
295 break;
296
297 default:
298 return -EINVAL;
299 break;
300 }
301
302 return 0;
303}
304
305static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
306 struct snd_soc_dai *dai)
307{
308 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
309 return kirkwood_i2s_play_trigger(substream, cmd, dai);
310 else
311 return kirkwood_i2s_rec_trigger(substream, cmd, dai);
312
313 return 0;
314}
315
316static int kirkwood_i2s_probe(struct platform_device *pdev,
317 struct snd_soc_dai *dai)
318{
319 unsigned long value;
320 unsigned int reg_data;
321
322 /* put system in a "safe" state : */
323 /* disable audio interrupts */
324 writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
325 writel(0, priv->io + KIRKWOOD_INT_MASK);
326
327 reg_data = readl(priv->io + 0x1200);
328 reg_data &= (~(0x333FF8));
329 reg_data |= 0x111D18;
330 writel(reg_data, priv->io + 0x1200);
331
332 msleep(500);
333
334 reg_data = readl(priv->io + 0x1200);
335 reg_data &= (~(0x333FF8));
336 reg_data |= 0x111D18;
337 writel(reg_data, priv->io + 0x1200);
338
339 /* disable playback/record */
340 value = readl(priv->io + KIRKWOOD_PLAYCTL);
341 value &= ~(KIRKWOOD_PLAYCTL_I2S_EN|KIRKWOOD_PLAYCTL_SPDIF_EN);
342 writel(value, priv->io + KIRKWOOD_PLAYCTL);
343
344 value = readl(priv->io + KIRKWOOD_RECCTL);
345 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
346 writel(value, priv->io + KIRKWOOD_RECCTL);
347
348 return 0;
349
350}
351
352static void kirkwood_i2s_remove(struct platform_device *pdev,
353 struct snd_soc_dai *dai)
354{
355}
356
357static struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
358 .trigger = kirkwood_i2s_trigger,
359 .hw_params = kirkwood_i2s_hw_params,
360 .set_fmt = kirkwood_i2s_set_fmt,
361};
362
363
364struct snd_soc_dai kirkwood_i2s_dai = {
365 .name = DRV_NAME,
366 .id = 0,
367 .probe = kirkwood_i2s_probe,
368 .remove = kirkwood_i2s_remove,
369 .playback = {
370 .channels_min = 1,
371 .channels_max = 2,
372 .rates = KIRKWOOD_I2S_RATES,
373 .formats = KIRKWOOD_I2S_FORMATS,},
374 .capture = {
375 .channels_min = 1,
376 .channels_max = 2,
377 .rates = KIRKWOOD_I2S_RATES,
378 .formats = KIRKWOOD_I2S_FORMATS,},
379 .ops = &kirkwood_i2s_dai_ops,
380};
381EXPORT_SYMBOL_GPL(kirkwood_i2s_dai);
382
383static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
384{
385 struct resource *mem;
386 struct kirkwood_asoc_platform_data *data =
387 pdev->dev.platform_data;
388 int err;
389
390 priv = kzalloc(sizeof(struct kirkwood_dma_data), GFP_KERNEL);
391 if (!priv) {
392 dev_err(&pdev->dev, "allocation failed\n");
393 err = -ENOMEM;
394 goto error;
395 }
396
397 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
398 if (!mem) {
399 dev_err(&pdev->dev, "platform_get_resource failed\n");
400 err = -ENXIO;
401 goto err_alloc;
402 }
403
404 priv->mem = request_mem_region(mem->start, SZ_16K, DRV_NAME);
405 if (!priv->mem) {
406 dev_err(&pdev->dev, "request_mem_region failed\n");
407 err = -EBUSY;
408 goto error;
409 }
410
411 priv->io = ioremap(priv->mem->start, SZ_16K);
412 if (!priv->io) {
413 dev_err(&pdev->dev, "ioremap failed\n");
414 err = -ENOMEM;
415 goto err_iomem;
416 }
417
418 priv->irq = platform_get_irq(pdev, 0);
419 if (priv->irq <= 0) {
420 dev_err(&pdev->dev, "platform_get_irq failed\n");
421 err = -ENXIO;
422 goto err_ioremap;
423 }
424
425 if (!data || !data->dram) {
426 dev_err(&pdev->dev, "no platform data ?!\n");
427 err = -EINVAL;
428 goto err_ioremap;
429 }
430
431 priv->dram = data->dram;
432 priv->burst = data->burst;
433
434 kirkwood_i2s_dai.capture.dma_data = priv;
435 kirkwood_i2s_dai.playback.dma_data = priv;
436
437 return snd_soc_register_dai(&kirkwood_i2s_dai);
438
439err_ioremap:
440 iounmap(priv->io);
441err_iomem:
442 release_mem_region(priv->mem->start, SZ_16K);
443err_alloc:
444 kfree(priv);
445error:
446 return err;
447}
448
449static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev)
450{
451 if (priv) {
452 iounmap(priv->io);
453 release_mem_region(priv->mem->start, SZ_16K);
454 kfree(priv);
455 }
456 snd_soc_unregister_dai(&kirkwood_i2s_dai);
457 return 0;
458}
459
460static struct platform_driver kirkwood_i2s_driver = {
461 .probe = kirkwood_i2s_dev_probe,
462 .remove = kirkwood_i2s_dev_remove,
463 .driver = {
464 .name = DRV_NAME,
465 .owner = THIS_MODULE,
466 },
467};
468
469static int __init kirkwood_i2s_init(void)
470{
471 return platform_driver_register(&kirkwood_i2s_driver);
472}
473module_init(kirkwood_i2s_init);
474
475static void __exit kirkwood_i2s_exit(void)
476{
477 platform_driver_unregister(&kirkwood_i2s_driver);
478}
479module_exit(kirkwood_i2s_exit);
480
481/* Module information */
482MODULE_AUTHOR("Arnaud Patard, <apatard@mandriva.com>");
483MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
484MODULE_LICENSE("GPL");
485MODULE_ALIAS("platform:kirkwood-i2s");
generated by cgit v1.2.2 (git 2.25.0) at 2025-02-11 07:40:37 -0500