123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119 |
- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * SoC audio for EDB93xx
- *
- * Copyright (c) 2010 Alexander Sverdlin <[email protected]>
- *
- * This driver support CS4271 codec being master or slave, working
- * in control port mode, connected either via SPI or I2C.
- * The data format accepted is I2S or left-justified.
- * DAPM support not implemented.
- */
- #include <linux/platform_device.h>
- #include <linux/gpio.h>
- #include <linux/module.h>
- #include <linux/soc/cirrus/ep93xx.h>
- #include <sound/core.h>
- #include <sound/pcm.h>
- #include <sound/soc.h>
- #include <asm/mach-types.h>
- static int edb93xx_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
- {
- struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
- struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
- struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
- int err;
- unsigned int mclk_rate;
- unsigned int rate = params_rate(params);
- /*
- * According to CS4271 datasheet we use MCLK/LRCK=256 for
- * rates below 50kHz and 128 for higher sample rates
- */
- if (rate < 50000)
- mclk_rate = rate * 64 * 4;
- else
- mclk_rate = rate * 64 * 2;
- err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
- SND_SOC_CLOCK_IN);
- if (err)
- return err;
- return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
- SND_SOC_CLOCK_OUT);
- }
- static const struct snd_soc_ops edb93xx_ops = {
- .hw_params = edb93xx_hw_params,
- };
- SND_SOC_DAILINK_DEFS(hifi,
- DAILINK_COMP_ARRAY(COMP_CPU("ep93xx-i2s")),
- DAILINK_COMP_ARRAY(COMP_CODEC("spi0.0", "cs4271-hifi")),
- DAILINK_COMP_ARRAY(COMP_PLATFORM("ep93xx-i2s")));
- static struct snd_soc_dai_link edb93xx_dai = {
- .name = "CS4271",
- .stream_name = "CS4271 HiFi",
- .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
- SND_SOC_DAIFMT_CBC_CFC,
- .ops = &edb93xx_ops,
- SND_SOC_DAILINK_REG(hifi),
- };
- static struct snd_soc_card snd_soc_edb93xx = {
- .name = "EDB93XX",
- .owner = THIS_MODULE,
- .dai_link = &edb93xx_dai,
- .num_links = 1,
- };
- static int edb93xx_probe(struct platform_device *pdev)
- {
- struct snd_soc_card *card = &snd_soc_edb93xx;
- int ret;
- ret = ep93xx_i2s_acquire();
- if (ret)
- return ret;
- card->dev = &pdev->dev;
- ret = snd_soc_register_card(card);
- if (ret) {
- dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
- ret);
- ep93xx_i2s_release();
- }
- return ret;
- }
- static int edb93xx_remove(struct platform_device *pdev)
- {
- struct snd_soc_card *card = platform_get_drvdata(pdev);
- snd_soc_unregister_card(card);
- ep93xx_i2s_release();
- return 0;
- }
- static struct platform_driver edb93xx_driver = {
- .driver = {
- .name = "edb93xx-audio",
- },
- .probe = edb93xx_probe,
- .remove = edb93xx_remove,
- };
- module_platform_driver(edb93xx_driver);
- MODULE_AUTHOR("Alexander Sverdlin <[email protected]>");
- MODULE_DESCRIPTION("ALSA SoC EDB93xx");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:edb93xx-audio");
|