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119 lines
2.8 KiB
119 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* SoC audio for EDB93xx |
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* |
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* Copyright (c) 2010 Alexander Sverdlin <[email protected]> |
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* |
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* This driver support CS4271 codec being master or slave, working |
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* in control port mode, connected either via SPI or I2C. |
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* The data format accepted is I2S or left-justified. |
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* DAPM support not implemented. |
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*/ |
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#include <linux/platform_device.h> |
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#include <linux/gpio.h> |
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#include <linux/module.h> |
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#include <linux/soc/cirrus/ep93xx.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/soc.h> |
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#include <asm/mach-types.h> |
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static int edb93xx_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 = asoc_substream_to_rtd(substream); |
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struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
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struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
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int err; |
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unsigned int mclk_rate; |
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unsigned int rate = params_rate(params); |
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/* |
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* According to CS4271 datasheet we use MCLK/LRCK=256 for |
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* rates below 50kHz and 128 for higher sample rates |
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*/ |
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if (rate < 50000) |
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mclk_rate = rate * 64 * 4; |
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else |
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mclk_rate = rate * 64 * 2; |
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err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, |
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SND_SOC_CLOCK_IN); |
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if (err) |
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return err; |
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return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, |
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SND_SOC_CLOCK_OUT); |
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} |
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static const struct snd_soc_ops edb93xx_ops = { |
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.hw_params = edb93xx_hw_params, |
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}; |
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SND_SOC_DAILINK_DEFS(hifi, |
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DAILINK_COMP_ARRAY(COMP_CPU("ep93xx-i2s")), |
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DAILINK_COMP_ARRAY(COMP_CODEC("spi0.0", "cs4271-hifi")), |
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DAILINK_COMP_ARRAY(COMP_PLATFORM("ep93xx-i2s"))); |
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static struct snd_soc_dai_link edb93xx_dai = { |
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.name = "CS4271", |
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.stream_name = "CS4271 HiFi", |
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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 = &edb93xx_ops, |
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SND_SOC_DAILINK_REG(hifi), |
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}; |
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static struct snd_soc_card snd_soc_edb93xx = { |
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.name = "EDB93XX", |
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.owner = THIS_MODULE, |
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.dai_link = &edb93xx_dai, |
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.num_links = 1, |
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}; |
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static int edb93xx_probe(struct platform_device *pdev) |
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{ |
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struct snd_soc_card *card = &snd_soc_edb93xx; |
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int ret; |
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ret = ep93xx_i2s_acquire(); |
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if (ret) |
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return 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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ep93xx_i2s_release(); |
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} |
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return ret; |
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} |
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static int edb93xx_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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ep93xx_i2s_release(); |
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return 0; |
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} |
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static struct platform_driver edb93xx_driver = { |
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.driver = { |
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.name = "edb93xx-audio", |
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}, |
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.probe = edb93xx_probe, |
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.remove = edb93xx_remove, |
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}; |
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module_platform_driver(edb93xx_driver); |
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MODULE_AUTHOR("Alexander Sverdlin <[email protected]>"); |
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MODULE_DESCRIPTION("ALSA SoC EDB93xx"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:edb93xx-audio");
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