105 строки
2.2 KiB
C
105 строки
2.2 KiB
C
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#include <linux/module.h>
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#include <sound/soc.h>
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#include <asm/mach-types.h>
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#include "../codecs/wm8940.h"
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#include "pxa2xx-i2s.h"
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static int imote2_asoc_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned int clk = 0;
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int ret;
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switch (params_rate(params)) {
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case 8000:
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case 16000:
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case 48000:
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case 96000:
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clk = 12288000;
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break;
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case 11025:
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case 22050:
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case 44100:
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clk = 11289600;
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break;
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}
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
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SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* set the I2S system clock as input (unused) */
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ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
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SND_SOC_CLOCK_OUT);
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return ret;
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}
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static struct snd_soc_ops imote2_asoc_ops = {
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.hw_params = imote2_asoc_hw_params,
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};
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static struct snd_soc_dai_link imote2_dai = {
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.name = "WM8940",
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.stream_name = "WM8940",
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.cpu_dai_name = "pxa2xx-i2s",
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.codec_dai_name = "wm8940-hifi",
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.platform_name = "pxa-pcm-audio",
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.codec_name = "wm8940-codec.0-0034",
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.ops = &imote2_asoc_ops,
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};
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static struct snd_soc_card imote2 = {
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.name = "Imote2",
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.owner = THIS_MODULE,
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.dai_link = &imote2_dai,
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.num_links = 1,
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};
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static int __devinit imote2_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &imote2;
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int ret;
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card->dev = &pdev->dev;
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ret = snd_soc_register_card(card);
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if (ret)
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dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
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ret);
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return ret;
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}
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static int __devexit imote2_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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snd_soc_unregister_card(card);
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return 0;
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}
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static struct platform_driver imote2_driver = {
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.driver = {
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.name = "imote2-audio",
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.owner = THIS_MODULE,
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},
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.probe = imote2_probe,
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.remove = __devexit_p(imote2_remove),
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};
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module_platform_driver(imote2_driver);
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MODULE_AUTHOR("Jonathan Cameron");
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MODULE_DESCRIPTION("ALSA SoC Imote 2");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:imote2-audio");
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