134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/*
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* ASoC machine driver for Snow boards
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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
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <sound/soc.h>
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#include "i2s.h"
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#define FIN_PLL_RATE 24000000
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static struct snd_soc_dai_link snow_dai[] = {
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{
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.name = "Primary",
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.stream_name = "Primary",
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.codec_dai_name = "HiFi",
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.dai_fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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},
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};
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static int snow_late_probe(struct snd_soc_card *card)
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{
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struct snd_soc_pcm_runtime *rtd;
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struct snd_soc_dai *codec_dai;
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struct snd_soc_dai *cpu_dai;
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int ret;
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rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
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codec_dai = rtd->codec_dai;
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cpu_dai = rtd->cpu_dai;
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/* Set the MCLK rate for the codec */
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ret = snd_soc_dai_set_sysclk(codec_dai, 0,
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FIN_PLL_RATE, SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* Select I2S Bus clock to set RCLK and BCLK */
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ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
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0, SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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return 0;
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}
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static struct snd_soc_card snow_snd = {
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.name = "Snow-I2S",
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.owner = THIS_MODULE,
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.dai_link = snow_dai,
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.num_links = ARRAY_SIZE(snow_dai),
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.late_probe = snow_late_probe,
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};
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static int snow_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &snow_snd;
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struct device_node *i2s_node, *codec_node;
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int i, ret;
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i2s_node = of_parse_phandle(pdev->dev.of_node,
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"samsung,i2s-controller", 0);
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if (!i2s_node) {
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dev_err(&pdev->dev,
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"Property 'i2s-controller' missing or invalid\n");
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return -EINVAL;
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}
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codec_node = of_parse_phandle(pdev->dev.of_node,
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"samsung,audio-codec", 0);
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if (!codec_node) {
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dev_err(&pdev->dev,
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"Property 'audio-codec' missing or invalid\n");
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return -EINVAL;
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}
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for (i = 0; i < ARRAY_SIZE(snow_dai); i++) {
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snow_dai[i].codec_of_node = codec_node;
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snow_dai[i].cpu_of_node = i2s_node;
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snow_dai[i].platform_of_node = i2s_node;
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}
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card->dev = &pdev->dev;
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/* Update card-name if provided through DT, else use default name */
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snd_soc_of_parse_card_name(card, "samsung,model");
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ret = devm_snd_soc_register_card(&pdev->dev, card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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return ret;
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}
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return ret;
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}
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static const struct of_device_id snow_of_match[] = {
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{ .compatible = "google,snow-audio-max98090", },
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{ .compatible = "google,snow-audio-max98091", },
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{ .compatible = "google,snow-audio-max98095", },
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{},
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};
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MODULE_DEVICE_TABLE(of, snow_of_match);
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static struct platform_driver snow_driver = {
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.driver = {
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.name = "snow-audio",
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.pm = &snd_soc_pm_ops,
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.of_match_table = snow_of_match,
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},
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.probe = snow_probe,
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};
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module_platform_driver(snow_driver);
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MODULE_DESCRIPTION("ALSA SoC Audio machine driver for Snow");
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MODULE_LICENSE("GPL");
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