1c942fddfSThomas Gleixner // SPDX-License-Identifier: GPL-2.0-or-later
20ed275efSAlexander Shiyan /*
30ed275efSAlexander Shiyan * SoC audio for EDB93xx
40ed275efSAlexander Shiyan *
50ed275efSAlexander Shiyan * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
60ed275efSAlexander Shiyan *
70ed275efSAlexander Shiyan * This driver support CS4271 codec being master or slave, working
80ed275efSAlexander Shiyan * in control port mode, connected either via SPI or I2C.
90ed275efSAlexander Shiyan * The data format accepted is I2S or left-justified.
100ed275efSAlexander Shiyan * DAPM support not implemented.
110ed275efSAlexander Shiyan */
120ed275efSAlexander Shiyan
130ed275efSAlexander Shiyan #include <linux/platform_device.h>
140ed275efSAlexander Shiyan #include <linux/gpio.h>
150ed275efSAlexander Shiyan #include <linux/module.h>
1667e38f57SArnd Bergmann #include <linux/soc/cirrus/ep93xx.h>
170ed275efSAlexander Shiyan #include <sound/core.h>
180ed275efSAlexander Shiyan #include <sound/pcm.h>
190ed275efSAlexander Shiyan #include <sound/soc.h>
200ed275efSAlexander Shiyan #include <asm/mach-types.h>
210ed275efSAlexander Shiyan
edb93xx_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)220ed275efSAlexander Shiyan static int edb93xx_hw_params(struct snd_pcm_substream *substream,
230ed275efSAlexander Shiyan struct snd_pcm_hw_params *params)
240ed275efSAlexander Shiyan {
25d42df940SKuninori Morimoto struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
2607c497a6SKuninori Morimoto struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
2707c497a6SKuninori Morimoto struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
280ed275efSAlexander Shiyan int err;
290ed275efSAlexander Shiyan unsigned int mclk_rate;
300ed275efSAlexander Shiyan unsigned int rate = params_rate(params);
310ed275efSAlexander Shiyan
320ed275efSAlexander Shiyan /*
330ed275efSAlexander Shiyan * According to CS4271 datasheet we use MCLK/LRCK=256 for
340ed275efSAlexander Shiyan * rates below 50kHz and 128 for higher sample rates
350ed275efSAlexander Shiyan */
360ed275efSAlexander Shiyan if (rate < 50000)
370ed275efSAlexander Shiyan mclk_rate = rate * 64 * 4;
380ed275efSAlexander Shiyan else
390ed275efSAlexander Shiyan mclk_rate = rate * 64 * 2;
400ed275efSAlexander Shiyan
410ed275efSAlexander Shiyan err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
420ed275efSAlexander Shiyan SND_SOC_CLOCK_IN);
430ed275efSAlexander Shiyan if (err)
440ed275efSAlexander Shiyan return err;
450ed275efSAlexander Shiyan
460ed275efSAlexander Shiyan return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
470ed275efSAlexander Shiyan SND_SOC_CLOCK_OUT);
480ed275efSAlexander Shiyan }
490ed275efSAlexander Shiyan
507f8159acSBhumika Goyal static const struct snd_soc_ops edb93xx_ops = {
510ed275efSAlexander Shiyan .hw_params = edb93xx_hw_params,
520ed275efSAlexander Shiyan };
530ed275efSAlexander Shiyan
545e883ff1SKuninori Morimoto SND_SOC_DAILINK_DEFS(hifi,
555e883ff1SKuninori Morimoto DAILINK_COMP_ARRAY(COMP_CPU("ep93xx-i2s")),
565e883ff1SKuninori Morimoto DAILINK_COMP_ARRAY(COMP_CODEC("spi0.0", "cs4271-hifi")),
575e883ff1SKuninori Morimoto DAILINK_COMP_ARRAY(COMP_PLATFORM("ep93xx-i2s")));
585e883ff1SKuninori Morimoto
590ed275efSAlexander Shiyan static struct snd_soc_dai_link edb93xx_dai = {
600ed275efSAlexander Shiyan .name = "CS4271",
610ed275efSAlexander Shiyan .stream_name = "CS4271 HiFi",
622d534113SAlexander Sverdlin .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
63c7801a3cSMark Brown SND_SOC_DAIFMT_CBC_CFC,
640ed275efSAlexander Shiyan .ops = &edb93xx_ops,
655e883ff1SKuninori Morimoto SND_SOC_DAILINK_REG(hifi),
660ed275efSAlexander Shiyan };
670ed275efSAlexander Shiyan
680ed275efSAlexander Shiyan static struct snd_soc_card snd_soc_edb93xx = {
690ed275efSAlexander Shiyan .name = "EDB93XX",
700ed275efSAlexander Shiyan .owner = THIS_MODULE,
710ed275efSAlexander Shiyan .dai_link = &edb93xx_dai,
720ed275efSAlexander Shiyan .num_links = 1,
730ed275efSAlexander Shiyan };
740ed275efSAlexander Shiyan
edb93xx_probe(struct platform_device * pdev)75145e2879SBill Pemberton static int edb93xx_probe(struct platform_device *pdev)
760ed275efSAlexander Shiyan {
770ed275efSAlexander Shiyan struct snd_soc_card *card = &snd_soc_edb93xx;
780ed275efSAlexander Shiyan int ret;
790ed275efSAlexander Shiyan
800ed275efSAlexander Shiyan ret = ep93xx_i2s_acquire();
810ed275efSAlexander Shiyan if (ret)
820ed275efSAlexander Shiyan return ret;
830ed275efSAlexander Shiyan
840ed275efSAlexander Shiyan card->dev = &pdev->dev;
850ed275efSAlexander Shiyan
860ed275efSAlexander Shiyan ret = snd_soc_register_card(card);
870ed275efSAlexander Shiyan if (ret) {
880ed275efSAlexander Shiyan dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
890ed275efSAlexander Shiyan ret);
900ed275efSAlexander Shiyan ep93xx_i2s_release();
910ed275efSAlexander Shiyan }
920ed275efSAlexander Shiyan
930ed275efSAlexander Shiyan return ret;
940ed275efSAlexander Shiyan }
950ed275efSAlexander Shiyan
edb93xx_remove(struct platform_device * pdev)96*e711b0fdSUwe Kleine-König static void edb93xx_remove(struct platform_device *pdev)
970ed275efSAlexander Shiyan {
980ed275efSAlexander Shiyan struct snd_soc_card *card = platform_get_drvdata(pdev);
990ed275efSAlexander Shiyan
1000ed275efSAlexander Shiyan snd_soc_unregister_card(card);
1010ed275efSAlexander Shiyan ep93xx_i2s_release();
1020ed275efSAlexander Shiyan }
1030ed275efSAlexander Shiyan
1040ed275efSAlexander Shiyan static struct platform_driver edb93xx_driver = {
1050ed275efSAlexander Shiyan .driver = {
1060ed275efSAlexander Shiyan .name = "edb93xx-audio",
1070ed275efSAlexander Shiyan },
1080ed275efSAlexander Shiyan .probe = edb93xx_probe,
109*e711b0fdSUwe Kleine-König .remove_new = edb93xx_remove,
1100ed275efSAlexander Shiyan };
1110ed275efSAlexander Shiyan
1120ed275efSAlexander Shiyan module_platform_driver(edb93xx_driver);
1130ed275efSAlexander Shiyan
1140ed275efSAlexander Shiyan MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
1150ed275efSAlexander Shiyan MODULE_DESCRIPTION("ALSA SoC EDB93xx");
1160ed275efSAlexander Shiyan MODULE_LICENSE("GPL");
1170ed275efSAlexander Shiyan MODULE_ALIAS("platform:edb93xx-audio");
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