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yaml --- r: 148247 b: refs/heads/master c: a195b51 h: refs/heads/master i: 148245: 40d1fe7 148243: 75e793e 148239: 1e55560 v: v3
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Jonathan Cameron
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Mark Brown
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May 5, 2009
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refs/heads/master: ee8f6894f358b6a04d8190fd78990749de98a498 | ||
refs/heads/master: a195b51bc5abc745f12b7b2fe0e3422f55c1953f |
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#include <linux/module.h> | ||
#include <sound/soc.h> | ||
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#include <asm/mach-types.h> | ||
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#include "../codecs/wm8940.h" | ||
#include "pxa2xx-i2s.h" | ||
#include "pxa2xx-pcm.h" | ||
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static int imote2_asoc_hw_params(struct snd_pcm_substream *substream, | ||
struct snd_pcm_hw_params *params) | ||
{ | ||
struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | ||
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | ||
unsigned int clk = 0; | ||
int ret; | ||
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switch (params_rate(params)) { | ||
case 8000: | ||
case 16000: | ||
case 48000: | ||
case 96000: | ||
clk = 12288000; | ||
break; | ||
case 11025: | ||
case 22050: | ||
case 44100: | ||
clk = 11289600; | ||
break; | ||
} | ||
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/* set codec DAI configuration */ | ||
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | ||
| SND_SOC_DAIFMT_NB_NF | ||
| SND_SOC_DAIFMT_CBS_CFS); | ||
if (ret < 0) | ||
return ret; | ||
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/* CPU should be clock master */ | ||
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | ||
| SND_SOC_DAIFMT_NB_NF | ||
| SND_SOC_DAIFMT_CBS_CFS); | ||
if (ret < 0) | ||
return ret; | ||
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, | ||
SND_SOC_CLOCK_IN); | ||
if (ret < 0) | ||
return ret; | ||
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/* set the I2S system clock as input (unused) */ | ||
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk, | ||
SND_SOC_CLOCK_OUT); | ||
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return ret; | ||
} | ||
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static struct snd_soc_ops imote2_asoc_ops = { | ||
.hw_params = imote2_asoc_hw_params, | ||
}; | ||
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static struct snd_soc_dai_link imote2_dai = { | ||
.name = "WM8940", | ||
.stream_name = "WM8940", | ||
.cpu_dai = &pxa_i2s_dai, | ||
.codec_dai = &wm8940_dai, | ||
.ops = &imote2_asoc_ops, | ||
}; | ||
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static struct snd_soc_card snd_soc_imote2 = { | ||
.name = "Imote2", | ||
.platform = &pxa2xx_soc_platform, | ||
.dai_link = &imote2_dai, | ||
.num_links = 1, | ||
}; | ||
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static struct snd_soc_device imote2_snd_devdata = { | ||
.card = &snd_soc_imote2, | ||
.codec_dev = &soc_codec_dev_wm8940, | ||
}; | ||
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static struct platform_device *imote2_snd_device; | ||
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static int __init imote2_asoc_init(void) | ||
{ | ||
int ret; | ||
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if (!machine_is_intelmote2()) | ||
return -ENODEV; | ||
imote2_snd_device = platform_device_alloc("soc-audio", -1); | ||
if (!imote2_snd_device) | ||
return -ENOMEM; | ||
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platform_set_drvdata(imote2_snd_device, &imote2_snd_devdata); | ||
imote2_snd_devdata.dev = &imote2_snd_device->dev; | ||
ret = platform_device_add(imote2_snd_device); | ||
if (ret) | ||
platform_device_put(imote2_snd_device); | ||
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return ret; | ||
} | ||
module_init(imote2_asoc_init); | ||
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static void __exit imote2_asoc_exit(void) | ||
{ | ||
platform_device_unregister(imote2_snd_device); | ||
} | ||
module_exit(imote2_asoc_exit); | ||
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MODULE_AUTHOR("Jonathan Cameron"); | ||
MODULE_DESCRIPTION("ALSA SoC Imote 2"); | ||
MODULE_LICENSE("GPL"); |