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#include <linux/module.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include "../codecs/wm8940.h"
#include "pxa2xx-i2s.h"
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->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
unsigned int clk = 0;
int ret;
switch (params_rate(params)) {
case 8000:
case 16000:
case 48000:
case 96000:
clk = 12288000;
break;
case 11025:
case 22050:
case 44100:
clk = 11289600;
break;
}
/* 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;
/* 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;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set the I2S system clock as input (unused) */
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
SND_SOC_CLOCK_OUT);
return ret;
}
static struct snd_soc_ops imote2_asoc_ops = {
.hw_params = imote2_asoc_hw_params,
};
static struct snd_soc_dai_link imote2_dai = {
.name = "WM8940",
.stream_name = "WM8940",
.cpu_dai_name = "pxa2xx-i2s",
.codec_dai_name = "wm8940-hifi",
.platform_name = "pxa-pcm-audio",
.codec_name = "wm8940-codec.0-0034",
.ops = &imote2_asoc_ops,
};
static struct snd_soc_card snd_soc_imote2 = {
.name = "Imote2",
.dai_link = &imote2_dai,
.num_links = 1,
};
static struct platform_device *imote2_snd_device;
static int __init imote2_asoc_init(void)
{
int ret;
if (!machine_is_intelmote2())
return -ENODEV;
imote2_snd_device = platform_device_alloc("soc-audio", -1);
if (!imote2_snd_device)
return -ENOMEM;
platform_set_drvdata(imote2_snd_device, &snd_soc_imote2);
ret = platform_device_add(imote2_snd_device);
if (ret)
platform_device_put(imote2_snd_device);
return ret;
}
module_init(imote2_asoc_init);
static void __exit imote2_asoc_exit(void)
{
platform_device_unregister(imote2_snd_device);
}
module_exit(imote2_asoc_exit);
MODULE_AUTHOR("Jonathan Cameron");
MODULE_DESCRIPTION("ALSA SoC Imote 2");
MODULE_LICENSE("GPL");
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