4 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
5 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
17 #include <linux/slab.h>
18 #include <linux/mbus.h>
19 #include <linux/delay.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/soc.h>
23 #include <plat/audio.h>
26 #define DRV_NAME "kirkwood-i2s"
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)
36 static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
39 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
43 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
44 case SND_SOC_DAIFMT_RIGHT_J:
45 mask = KIRKWOOD_I2S_CTL_RJ;
47 case SND_SOC_DAIFMT_LEFT_J:
48 mask = KIRKWOOD_I2S_CTL_LJ;
50 case SND_SOC_DAIFMT_I2S:
51 mask = KIRKWOOD_I2S_CTL_I2S;
58 * Set same format for playback and record
59 * This avoids some troubles.
61 value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
62 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
64 writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
66 value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
67 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
69 writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
74 static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
78 value = KIRKWOOD_DCO_CTL_OFFSET_0;
82 value |= KIRKWOOD_DCO_CTL_FREQ_11;
85 value |= KIRKWOOD_DCO_CTL_FREQ_12;
88 value |= KIRKWOOD_DCO_CTL_FREQ_24;
91 writel(value, io + KIRKWOOD_DCO_CTL);
93 /* wait for dco locked */
96 value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
97 value &= KIRKWOOD_DCO_SPCR_STATUS;
101 static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
102 struct snd_soc_dai *dai)
104 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
106 snd_soc_dai_set_dma_data(dai, substream, priv);
110 static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
111 struct snd_pcm_hw_params *params,
112 struct snd_soc_dai *dai)
114 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
115 unsigned int i2s_reg, reg;
116 unsigned long i2s_value, value;
118 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
119 i2s_reg = KIRKWOOD_I2S_PLAYCTL;
120 reg = KIRKWOOD_PLAYCTL;
122 i2s_reg = KIRKWOOD_I2S_RECCTL;
123 reg = KIRKWOOD_RECCTL;
127 kirkwood_set_dco(priv->io, params_rate(params));
129 i2s_value = readl(priv->io+i2s_reg);
130 i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
132 value = readl(priv->io+reg);
133 value &= ~KIRKWOOD_PLAYCTL_SIZE_MASK;
136 * Size settings in play/rec i2s control regs and play/rec control
137 * regs must be the same.
139 switch (params_format(params)) {
140 case SNDRV_PCM_FORMAT_S16_LE:
141 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
142 value |= KIRKWOOD_PLAYCTL_SIZE_16_C;
145 * doesn't work... S20_3LE != kirkwood 20bit format ?
147 case SNDRV_PCM_FORMAT_S20_3LE:
148 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
149 value |= KIRKWOOD_PLAYCTL_SIZE_20;
152 case SNDRV_PCM_FORMAT_S24_LE:
153 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
154 value |= KIRKWOOD_PLAYCTL_SIZE_24;
156 case SNDRV_PCM_FORMAT_S32_LE:
157 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
158 value |= KIRKWOOD_PLAYCTL_SIZE_32;
164 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
165 value &= ~KIRKWOOD_PLAYCTL_MONO_MASK;
166 if (params_channels(params) == 1)
167 value |= KIRKWOOD_PLAYCTL_MONO_BOTH;
169 value |= KIRKWOOD_PLAYCTL_MONO_OFF;
172 writel(i2s_value, priv->io+i2s_reg);
173 writel(value, priv->io+reg);
178 static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
179 int cmd, struct snd_soc_dai *dai)
181 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
185 * specs says KIRKWOOD_PLAYCTL must be read 2 times before
186 * changing it. So read 1 time here and 1 later.
188 value = readl(priv->io + KIRKWOOD_PLAYCTL);
191 case SNDRV_PCM_TRIGGER_START:
192 /* stop audio, enable interrupts */
193 value = readl(priv->io + KIRKWOOD_PLAYCTL);
194 value |= KIRKWOOD_PLAYCTL_PAUSE;
195 writel(value, priv->io + KIRKWOOD_PLAYCTL);
197 value = readl(priv->io + KIRKWOOD_INT_MASK);
198 value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
199 writel(value, priv->io + KIRKWOOD_INT_MASK);
201 /* configure audio & enable i2s playback */
202 value = readl(priv->io + KIRKWOOD_PLAYCTL);
203 value &= ~KIRKWOOD_PLAYCTL_BURST_MASK;
204 value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE
205 | KIRKWOOD_PLAYCTL_SPDIF_EN);
207 if (priv->burst == 32)
208 value |= KIRKWOOD_PLAYCTL_BURST_32;
210 value |= KIRKWOOD_PLAYCTL_BURST_128;
211 value |= KIRKWOOD_PLAYCTL_I2S_EN;
212 writel(value, priv->io + KIRKWOOD_PLAYCTL);
215 case SNDRV_PCM_TRIGGER_STOP:
216 /* stop audio, disable interrupts */
217 value = readl(priv->io + KIRKWOOD_PLAYCTL);
218 value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
219 writel(value, priv->io + KIRKWOOD_PLAYCTL);
221 value = readl(priv->io + KIRKWOOD_INT_MASK);
222 value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
223 writel(value, priv->io + KIRKWOOD_INT_MASK);
225 /* disable all playbacks */
226 value = readl(priv->io + KIRKWOOD_PLAYCTL);
227 value &= ~(KIRKWOOD_PLAYCTL_I2S_EN | KIRKWOOD_PLAYCTL_SPDIF_EN);
228 writel(value, priv->io + KIRKWOOD_PLAYCTL);
231 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
232 case SNDRV_PCM_TRIGGER_SUSPEND:
233 value = readl(priv->io + KIRKWOOD_PLAYCTL);
234 value |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE;
235 writel(value, priv->io + KIRKWOOD_PLAYCTL);
238 case SNDRV_PCM_TRIGGER_RESUME:
239 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
240 value = readl(priv->io + KIRKWOOD_PLAYCTL);
241 value &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE);
242 writel(value, priv->io + KIRKWOOD_PLAYCTL);
252 static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
253 int cmd, struct snd_soc_dai *dai)
255 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
258 value = readl(priv->io + KIRKWOOD_RECCTL);
261 case SNDRV_PCM_TRIGGER_START:
262 /* stop audio, enable interrupts */
263 value = readl(priv->io + KIRKWOOD_RECCTL);
264 value |= KIRKWOOD_RECCTL_PAUSE;
265 writel(value, priv->io + KIRKWOOD_RECCTL);
267 value = readl(priv->io + KIRKWOOD_INT_MASK);
268 value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
269 writel(value, priv->io + KIRKWOOD_INT_MASK);
271 /* configure audio & enable i2s record */
272 value = readl(priv->io + KIRKWOOD_RECCTL);
273 value &= ~KIRKWOOD_RECCTL_BURST_MASK;
274 value &= ~KIRKWOOD_RECCTL_MONO;
275 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE
276 | KIRKWOOD_RECCTL_SPDIF_EN);
278 if (priv->burst == 32)
279 value |= KIRKWOOD_RECCTL_BURST_32;
281 value |= KIRKWOOD_RECCTL_BURST_128;
282 value |= KIRKWOOD_RECCTL_I2S_EN;
284 writel(value, priv->io + KIRKWOOD_RECCTL);
287 case SNDRV_PCM_TRIGGER_STOP:
288 /* stop audio, disable interrupts */
289 value = readl(priv->io + KIRKWOOD_RECCTL);
290 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
291 writel(value, priv->io + KIRKWOOD_RECCTL);
293 value = readl(priv->io + KIRKWOOD_INT_MASK);
294 value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
295 writel(value, priv->io + KIRKWOOD_INT_MASK);
297 /* disable all records */
298 value = readl(priv->io + KIRKWOOD_RECCTL);
299 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
300 writel(value, priv->io + KIRKWOOD_RECCTL);
303 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
304 case SNDRV_PCM_TRIGGER_SUSPEND:
305 value = readl(priv->io + KIRKWOOD_RECCTL);
306 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
307 writel(value, priv->io + KIRKWOOD_RECCTL);
310 case SNDRV_PCM_TRIGGER_RESUME:
311 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
312 value = readl(priv->io + KIRKWOOD_RECCTL);
313 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
314 writel(value, priv->io + KIRKWOOD_RECCTL);
324 static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
325 struct snd_soc_dai *dai)
327 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
328 return kirkwood_i2s_play_trigger(substream, cmd, dai);
330 return kirkwood_i2s_rec_trigger(substream, cmd, dai);
335 static int kirkwood_i2s_probe(struct snd_soc_dai *dai)
337 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
339 unsigned int reg_data;
341 /* put system in a "safe" state : */
342 /* disable audio interrupts */
343 writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
344 writel(0, priv->io + KIRKWOOD_INT_MASK);
346 reg_data = readl(priv->io + 0x1200);
347 reg_data &= (~(0x333FF8));
348 reg_data |= 0x111D18;
349 writel(reg_data, priv->io + 0x1200);
353 reg_data = readl(priv->io + 0x1200);
354 reg_data &= (~(0x333FF8));
355 reg_data |= 0x111D18;
356 writel(reg_data, priv->io + 0x1200);
358 /* disable playback/record */
359 value = readl(priv->io + KIRKWOOD_PLAYCTL);
360 value &= ~(KIRKWOOD_PLAYCTL_I2S_EN|KIRKWOOD_PLAYCTL_SPDIF_EN);
361 writel(value, priv->io + KIRKWOOD_PLAYCTL);
363 value = readl(priv->io + KIRKWOOD_RECCTL);
364 value &= ~(KIRKWOOD_RECCTL_I2S_EN | KIRKWOOD_RECCTL_SPDIF_EN);
365 writel(value, priv->io + KIRKWOOD_RECCTL);
371 static int kirkwood_i2s_remove(struct snd_soc_dai *dai)
376 static struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
377 .startup = kirkwood_i2s_startup,
378 .trigger = kirkwood_i2s_trigger,
379 .hw_params = kirkwood_i2s_hw_params,
380 .set_fmt = kirkwood_i2s_set_fmt,
384 static struct snd_soc_dai_driver kirkwood_i2s_dai = {
385 .probe = kirkwood_i2s_probe,
386 .remove = kirkwood_i2s_remove,
390 .rates = KIRKWOOD_I2S_RATES,
391 .formats = KIRKWOOD_I2S_FORMATS,},
395 .rates = KIRKWOOD_I2S_RATES,
396 .formats = KIRKWOOD_I2S_FORMATS,},
397 .ops = &kirkwood_i2s_dai_ops,
400 static __devinit int kirkwood_i2s_dev_probe(struct platform_device *pdev)
402 struct resource *mem;
403 struct kirkwood_asoc_platform_data *data =
404 pdev->dev.platform_data;
405 struct kirkwood_dma_data *priv;
408 priv = kzalloc(sizeof(struct kirkwood_dma_data), GFP_KERNEL);
410 dev_err(&pdev->dev, "allocation failed\n");
414 dev_set_drvdata(&pdev->dev, priv);
416 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
418 dev_err(&pdev->dev, "platform_get_resource failed\n");
423 priv->mem = request_mem_region(mem->start, SZ_16K, DRV_NAME);
425 dev_err(&pdev->dev, "request_mem_region failed\n");
430 priv->io = ioremap(priv->mem->start, SZ_16K);
432 dev_err(&pdev->dev, "ioremap failed\n");
437 priv->irq = platform_get_irq(pdev, 0);
438 if (priv->irq <= 0) {
439 dev_err(&pdev->dev, "platform_get_irq failed\n");
444 if (!data || !data->dram) {
445 dev_err(&pdev->dev, "no platform data ?!\n");
450 priv->dram = data->dram;
451 priv->burst = data->burst;
453 return snd_soc_register_dai(&pdev->dev, &kirkwood_i2s_dai);
458 release_mem_region(priv->mem->start, SZ_16K);
465 static __devexit int kirkwood_i2s_dev_remove(struct platform_device *pdev)
467 struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
469 snd_soc_unregister_dai(&pdev->dev);
471 release_mem_region(priv->mem->start, SZ_16K);
477 static struct platform_driver kirkwood_i2s_driver = {
478 .probe = kirkwood_i2s_dev_probe,
479 .remove = kirkwood_i2s_dev_remove,
482 .owner = THIS_MODULE,
486 static int __init kirkwood_i2s_init(void)
488 return platform_driver_register(&kirkwood_i2s_driver);
490 module_init(kirkwood_i2s_init);
492 static void __exit kirkwood_i2s_exit(void)
494 platform_driver_unregister(&kirkwood_i2s_driver);
496 module_exit(kirkwood_i2s_exit);
498 /* Module information */
499 MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
500 MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
501 MODULE_LICENSE("GPL");
502 MODULE_ALIAS("platform:kirkwood-i2s");