From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- sound/soc/cirrus/edb93xx.c | 117 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 sound/soc/cirrus/edb93xx.c (limited to 'sound/soc/cirrus/edb93xx.c') diff --git a/sound/soc/cirrus/edb93xx.c b/sound/soc/cirrus/edb93xx.c new file mode 100644 index 0000000000..f49caab21a --- /dev/null +++ b/sound/soc/cirrus/edb93xx.c @@ -0,0 +1,117 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * SoC audio for EDB93xx + * + * Copyright (c) 2010 Alexander Sverdlin + * + * 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 +#include +#include +#include +#include +#include +#include +#include + +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 void edb93xx_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + snd_soc_unregister_card(card); + ep93xx_i2s_release(); +} + +static struct platform_driver edb93xx_driver = { + .driver = { + .name = "edb93xx-audio", + }, + .probe = edb93xx_probe, + .remove_new = edb93xx_remove, +}; + +module_platform_driver(edb93xx_driver); + +MODULE_AUTHOR("Alexander Sverdlin "); +MODULE_DESCRIPTION("ALSA SoC EDB93xx"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:edb93xx-audio"); -- cgit v1.2.3