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Diffstat (limited to 'sound/soc/kirkwood/kirkwood-i2s.c')
-rw-r--r--sound/soc/kirkwood/kirkwood-i2s.c495
1 files changed, 495 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..981ffc2a13c8
--- /dev/null
+++ b/sound/soc/kirkwood/kirkwood-i2s.c
@@ -0,0 +1,495 @@
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
157 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
158 value &= ~KIRKWOOD_PLAYCTL_MONO_MASK;
159 if (params_channels(params) == 1)
160 value |= KIRKWOOD_PLAYCTL_MONO_BOTH;
161 else
162 value |= KIRKWOOD_PLAYCTL_MONO_OFF;
163 }
164
165 writel(i2s_value, priv->io+i2s_reg);
166 writel(value, priv->io+reg);
167
168 return 0;
169}
170
171static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
172 int cmd, struct snd_soc_dai *dai)
173{
174 unsigned long value;
175
176 /*
177 * specs says KIRKWOOD_PLAYCTL must be read 2 times before
178 * changing it. So read 1 time here and 1 later.
179 */
180 value = readl(priv->io + KIRKWOOD_PLAYCTL);
181
182 switch (cmd) {
183 case SNDRV_PCM_TRIGGER_START:
184 /* stop audio, enable interrupts */
185 value = readl(priv->io + KIRKWOOD_PLAYCTL);
186 value |= KIRKWOOD_PLAYCTL_PAUSE;
187 writel(value, priv->io + KIRKWOOD_PLAYCTL);
188
189 value = readl(priv->io + KIRKWOOD_INT_MASK);
190 value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
191 writel(value, priv->io + KIRKWOOD_INT_MASK);
192
193 /* configure audio & enable i2s playback */
194 value = readl(priv->io + KIRKWOOD_PLAYCTL);
195 value &= ~KIRKWOOD_PLAYCTL_BURST_MASK;
196 value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE
197 | KIRKWOOD_PLAYCTL_SPDIF_EN);
198
199 if (priv->burst == 32)
200 value |= KIRKWOOD_PLAYCTL_BURST_32;
201 else
202 value |= KIRKWOOD_PLAYCTL_BURST_128;
203 value |= KIRKWOOD_PLAYCTL_I2S_EN;
204 writel(value, priv->io + KIRKWOOD_PLAYCTL);
205 break;
206
207 case SNDRV_PCM_TRIGGER_STOP:
208 /* stop audio, disable interrupts */
209 value = readl(priv->io + KIRKWOOD_PLAYCTL);
210 value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
211 writel(value, priv->io + KIRKWOOD_PLAYCTL);
212
213 value = readl(priv->io + KIRKWOOD_INT_MASK);
214 value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
215 writel(value, priv->io + KIRKWOOD_INT_MASK);
216
217 /* disable all playbacks */
218 value = readl(priv->io + KIRKWOOD_PLAYCTL);
219 value &= ~(KIRKWOOD_PLAYCTL_I2S_EN | KIRKWOOD_PLAYCTL_SPDIF_EN);
220 writel(value, priv->io + KIRKWOOD_PLAYCTL);
221 break;
222
223 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
224 case SNDRV_PCM_TRIGGER_SUSPEND:
225 value = readl(priv->io + KIRKWOOD_PLAYCTL);
226 value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
227 writel(value, priv->io + KIRKWOOD_PLAYCTL);
228 break;
229
230 case SNDRV_PCM_TRIGGER_RESUME:
231 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
232 value = readl(priv->io + KIRKWOOD_PLAYCTL);
233 value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE);
234 writel(value, priv->io + KIRKWOOD_PLAYCTL);
235 break;
236
237 default:
238 return -EINVAL;
239 }
240
241 return 0;
242}
243
244static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
245 int cmd, struct snd_soc_dai *dai)
246{
247 unsigned long value;
248
249 value = readl(priv->io + KIRKWOOD_RECCTL);
250
251 switch (cmd) {
252 case SNDRV_PCM_TRIGGER_START:
253 /* stop audio, enable interrupts */
254 value = readl(priv->io + KIRKWOOD_RECCTL);
255 value |= KIRKWOOD_RECCTL_PAUSE;
256 writel(value, priv->io + KIRKWOOD_RECCTL);
257
258 value = readl(priv->io + KIRKWOOD_INT_MASK);
259 value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
260 writel(value, priv->io + KIRKWOOD_INT_MASK);
261
262 /* configure audio & enable i2s record */
263 value = readl(priv->io + KIRKWOOD_RECCTL);
264 value &= ~KIRKWOOD_RECCTL_BURST_MASK;
265 value &= ~KIRKWOOD_RECCTL_MONO;
266 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE
267 | KIRKWOOD_RECCTL_SPDIF_EN);
268
269 if (priv->burst == 32)
270 value |= KIRKWOOD_RECCTL_BURST_32;
271 else
272 value |= KIRKWOOD_RECCTL_BURST_128;
273 value |= KIRKWOOD_RECCTL_I2S_EN;
274
275 writel(value, priv->io + KIRKWOOD_RECCTL);
276 break;
277
278 case SNDRV_PCM_TRIGGER_STOP:
279 /* stop audio, disable interrupts */
280 value = readl(priv->io + KIRKWOOD_RECCTL);
281 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
282 writel(value, priv->io + KIRKWOOD_RECCTL);
283
284 value = readl(priv->io + KIRKWOOD_INT_MASK);
285 value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
286 writel(value, priv->io + KIRKWOOD_INT_MASK);
287
288 /* disable all records */
289 value = readl(priv->io + KIRKWOOD_RECCTL);
290 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
291 writel(value, priv->io + KIRKWOOD_RECCTL);
292 break;
293
294 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
295 case SNDRV_PCM_TRIGGER_SUSPEND:
296 value = readl(priv->io + KIRKWOOD_RECCTL);
297 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
298 writel(value, priv->io + KIRKWOOD_RECCTL);
299 break;
300
301 case SNDRV_PCM_TRIGGER_RESUME:
302 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
303 value = readl(priv->io + KIRKWOOD_RECCTL);
304 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
305 writel(value, priv->io + KIRKWOOD_RECCTL);
306 break;
307
308 default:
309 return -EINVAL;
310 }
311
312 return 0;
313}
314
315static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
316 struct snd_soc_dai *dai)
317{
318 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
319 return kirkwood_i2s_play_trigger(substream, cmd, dai);
320 else
321 return kirkwood_i2s_rec_trigger(substream, cmd, dai);
322
323 return 0;
324}
325
326static int kirkwood_i2s_probe(struct platform_device *pdev,
327 struct snd_soc_dai *dai)
328{
329 unsigned long value;
330 unsigned int reg_data;
331
332 /* put system in a "safe" state : */
333 /* disable audio interrupts */
334 writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
335 writel(0, priv->io + KIRKWOOD_INT_MASK);
336
337 reg_data = readl(priv->io + 0x1200);
338 reg_data &= (~(0x333FF8));
339 reg_data |= 0x111D18;
340 writel(reg_data, priv->io + 0x1200);
341
342 msleep(500);
343
344 reg_data = readl(priv->io + 0x1200);
345 reg_data &= (~(0x333FF8));
346 reg_data |= 0x111D18;
347 writel(reg_data, priv->io + 0x1200);
348
349 /* disable playback/record */
350 value = readl(priv->io + KIRKWOOD_PLAYCTL);
351 value &= ~(KIRKWOOD_PLAYCTL_I2S_EN|KIRKWOOD_PLAYCTL_SPDIF_EN);
352 writel(value, priv->io + KIRKWOOD_PLAYCTL);
353
354 value = readl(priv->io + KIRKWOOD_RECCTL);
355 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
356 writel(value, priv->io + KIRKWOOD_RECCTL);
357
358 return 0;
359
360}
361
362static void kirkwood_i2s_remove(struct platform_device *pdev,
363 struct snd_soc_dai *dai)
364{
365}
366
367static struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
368 .trigger = kirkwood_i2s_trigger,
369 .hw_params = kirkwood_i2s_hw_params,
370 .set_fmt = kirkwood_i2s_set_fmt,
371};
372
373
374struct snd_soc_dai kirkwood_i2s_dai = {
375 .name = DRV_NAME,
376 .id = 0,
377 .probe = kirkwood_i2s_probe,
378 .remove = kirkwood_i2s_remove,
379 .playback = {
380 .channels_min = 1,
381 .channels_max = 2,
382 .rates = KIRKWOOD_I2S_RATES,
383 .formats = KIRKWOOD_I2S_FORMATS,},
384 .capture = {
385 .channels_min = 1,
386 .channels_max = 2,
387 .rates = KIRKWOOD_I2S_RATES,
388 .formats = KIRKWOOD_I2S_FORMATS,},
389 .ops = &kirkwood_i2s_dai_ops,
390};
391EXPORT_SYMBOL_GPL(kirkwood_i2s_dai);
392
393static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
394{
395 struct resource *mem;
396 struct kirkwood_asoc_platform_data *data =
397 pdev->dev.platform_data;
398 int err;
399
400 priv = kzalloc(sizeof(struct kirkwood_dma_data), GFP_KERNEL);
401 if (!priv) {
402 dev_err(&pdev->dev, "allocation failed\n");
403 err = -ENOMEM;
404 goto error;
405 }
406
407 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
408 if (!mem) {
409 dev_err(&pdev->dev, "platform_get_resource failed\n");
410 err = -ENXIO;
411 goto err_alloc;
412 }
413
414 priv->mem = request_mem_region(mem->start, SZ_16K, DRV_NAME);
415 if (!priv->mem) {
416 dev_err(&pdev->dev, "request_mem_region failed\n");
417 err = -EBUSY;
418 goto error;
419 }
420
421 priv->io = ioremap(priv->mem->start, SZ_16K);
422 if (!priv->io) {
423 dev_err(&pdev->dev, "ioremap failed\n");
424 err = -ENOMEM;
425 goto err_iomem;
426 }
427
428 priv->irq = platform_get_irq(pdev, 0);
429 if (priv->irq <= 0) {
430 dev_err(&pdev->dev, "platform_get_irq failed\n");
431 err = -ENXIO;
432 goto err_ioremap;
433 }
434
435 if (!data || !data->dram) {
436 dev_err(&pdev->dev, "no platform data ?!\n");
437 err = -EINVAL;
438 goto err_ioremap;
439 }
440
441 priv->dram = data->dram;
442 priv->burst = data->burst;
443
444 kirkwood_i2s_dai.capture.dma_data = priv;
445 kirkwood_i2s_dai.playback.dma_data = priv;
446
447 return snd_soc_register_dai(&kirkwood_i2s_dai);
448
449err_ioremap:
450 iounmap(priv->io);
451err_iomem:
452 release_mem_region(priv->mem->start, SZ_16K);
453err_alloc:
454 kfree(priv);
455error:
456 return err;
457}
458
459static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev)
460{
461 if (priv) {
462 iounmap(priv->io);
463 release_mem_region(priv->mem->start, SZ_16K);
464 kfree(priv);
465 }
466 snd_soc_unregister_dai(&kirkwood_i2s_dai);
467 return 0;
468}
469
470static struct platform_driver kirkwood_i2s_driver = {
471 .probe = kirkwood_i2s_dev_probe,
472 .remove = kirkwood_i2s_dev_remove,
473 .driver = {
474 .name = DRV_NAME,
475 .owner = THIS_MODULE,
476 },
477};
478
479static int __init kirkwood_i2s_init(void)
480{
481 return platform_driver_register(&kirkwood_i2s_driver);
482}
483module_init(kirkwood_i2s_init);
484
485static void __exit kirkwood_i2s_exit(void)
486{
487 platform_driver_unregister(&kirkwood_i2s_driver);
488}
489module_exit(kirkwood_i2s_exit);
490
491/* Module information */
492MODULE_AUTHOR("Arnaud Patard, <apatard@mandriva.com>");
493MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
494MODULE_LICENSE("GPL");
495MODULE_ALIAS("platform:kirkwood-i2s");
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-18 09:49:04 -0500