169 lines
3.9 KiB
C
169 lines
3.9 KiB
C
/*
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* sound\soc\sunxi\audiocodec\sunxi_sndcodec.c
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* (C) Copyright 2010-2016
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* Reuuimlla Technology Co., Ltd. <www.reuuimllatech.com>
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* huangxin <huangxin@Reuuimllatech.com>
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*
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* some simple description for this code
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/clk.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <sound/soc-dapm.h>
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#include <linux/io.h>
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#if defined CONFIG_ARCH_SUN8IW5 || defined CONFIG_ARCH_SUN8IW9
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static int sunxi_sndpcm_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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int ret = 0;
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u32 freq = 22579200;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned long sample_rate = params_rate(params);
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switch (sample_rate) {
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case 8000:
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case 16000:
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case 32000:
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case 64000:
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case 128000:
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case 12000:
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case 24000:
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case 48000:
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case 96000:
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case 192000:
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freq = 24576000;
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break;
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}
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/*set system clock source freq */
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ret = snd_soc_dai_set_sysclk(cpu_dai, 0 , freq, 0);
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if (ret < 0)
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return ret;
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/*set system fmt:api2s:master aif1:slave*/
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ret = snd_soc_dai_set_fmt(cpu_dai, 0);
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if (ret < 0) {
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pr_err("%s, line:%d\n", __func__, __LINE__);
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return ret;
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}
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ret = snd_soc_dai_set_clkdiv(cpu_dai, 0, sample_rate);
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if (ret < 0) {
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pr_err("%s, line:%d\n", __func__, __LINE__);
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return ret;
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}
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return 0;
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}
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static struct snd_soc_ops sunxi_sndpcm_ops = {
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.hw_params = sunxi_sndpcm_hw_params,
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};
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#endif
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static struct snd_soc_dai_link sunxi_sndpcm_dai_link = {
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.name = "audiocodec",
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.stream_name = "SUNXI-CODEC",
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.cpu_dai_name = "sunxi-codec",
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.codec_dai_name = "sndcodec",
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.platform_name = "sunxi-pcm-codec-audio",
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.codec_name = "sunxi-pcm-codec",
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#if defined CONFIG_ARCH_SUN8IW5 || defined CONFIG_ARCH_SUN8IW9
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.ops = &sunxi_sndpcm_ops,
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#endif
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};
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static struct snd_soc_card snd_soc_sunxi_sndpcm = {
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.name = "audiocodec",
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.owner = THIS_MODULE,
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.dai_link = &sunxi_sndpcm_dai_link,
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.num_links = 1,
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};
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static int sunxi_sndpcm_dev_probe(struct platform_device *pdev)
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{
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int ret = 0;
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struct snd_soc_card *card = &snd_soc_sunxi_sndpcm;
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card->dev = &pdev->dev;
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/* codec_of_node */
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sunxi_sndpcm_dai_link.codec_name = NULL;
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sunxi_sndpcm_dai_link.codec_of_node =
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of_find_compatible_node(NULL, NULL,
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"allwinner,sunxi-internal-codec");
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if (!sunxi_sndpcm_dai_link.codec_of_node) {
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dev_err(&pdev->dev, "codec_of_node missing or invalid\n");
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ret = -EINVAL;
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}
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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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}
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return ret;
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}
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static int __exit sunxi_sndpcm_dev_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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/*data relating*/
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static struct platform_device sunxi_sndpcm_device = {
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.name = "audiocodec",
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.id = PLATFORM_DEVID_NONE,
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};
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/*method relating*/
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static struct platform_driver sunxi_sndpcm_driver = {
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.probe = sunxi_sndpcm_dev_probe,
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.remove = sunxi_sndpcm_dev_remove,
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.driver = {
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.name = "audiocodec",
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.owner = THIS_MODULE,
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.pm = &snd_soc_pm_ops,
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},
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};
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static int __init sunxi_sndpcm_init(void)
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{
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int err = 0;
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err = platform_device_register(&sunxi_sndpcm_device);
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if (err < 0)
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return err;
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err = platform_driver_register(&sunxi_sndpcm_driver);
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if (err < 0)
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return err;
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return 0;
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}
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module_init(sunxi_sndpcm_init);
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static void __exit sunxi_sndpcm_exit(void)
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{
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platform_driver_unregister(&sunxi_sndpcm_driver);
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}
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module_exit(sunxi_sndpcm_exit);
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MODULE_AUTHOR("huangxin");
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MODULE_DESCRIPTION("SUNXI_sndpcm ALSA SoC audio driver");
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MODULE_LICENSE("GPL");
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