[deliverable/linux.git] / sound / soc / cirrus / edb93xx.c

/*
 * SoC audio for EDB93xx
 *
 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * 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 <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>

static int edb93xx_hw_params(struct snd_pcm_substream *substream,
			     struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	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 struct snd_soc_ops edb93xx_ops = {
	.hw_params	= edb93xx_hw_params,
};

static struct snd_soc_dai_link edb93xx_dai = {
	.name		= "CS4271",
	.stream_name	= "CS4271 HiFi",
	.platform_name	= "ep93xx-i2s",
	.cpu_dai_name	= "ep93xx-i2s",
	.codec_name	= "spi0.0",
	.codec_dai_name	= "cs4271-hifi",
	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
			  SND_SOC_DAIFMT_CBS_CFS,
	.ops		= &edb93xx_ops,
};

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 <subaparts@yandex.ru>");
MODULE_DESCRIPTION("ALSA SoC EDB93xx");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:edb93xx-audio");
Commit	Line	Data
86c33041 AS	1	/*
	2	* SoC audio for EDB93xx
	3	*
	4	* Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
	5	*
	6	* This program is free software; you can redistribute it and/or
	7	* modify it under the terms of the GNU General Public License
	8	* as published by the Free Software Foundation; either version 2
	9	* of the License, or (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* This driver support CS4271 codec being master or slave, working
	17	* in control port mode, connected either via SPI or I2C.
	18	* The data format accepted is I2S or left-justified.
	19	* DAPM support not implemented.
	20	*/
	21
	22	#include <linux/platform_device.h>
	23	#include <linux/gpio.h>
da155d5b	24	#include <linux/module.h>
86c33041 AS	25	#include <sound/core.h>
	26	#include <sound/pcm.h>
	27	#include <sound/soc.h>
	28	#include <asm/mach-types.h>
	29	#include <mach/hardware.h>
86c33041	30
86c33041 AS	31	static int edb93xx_hw_params(struct snd_pcm_substream *substream,
	32	struct snd_pcm_hw_params *params)
	33	{
	34	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	35	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	36	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	37	int err;
6d33cd77	38	unsigned int mclk_rate;
86c33041	39	unsigned int rate = params_rate(params);
6d33cd77	40
86c33041	41	/*
6d33cd77 AS	42	* According to CS4271 datasheet we use MCLK/LRCK=256 for
6d33cd77 AS	43	* rates below 50kHz and 128 for higher sample rates
86c33041	44	*/
6d33cd77 AS	45	if (rate < 50000)
	46	mclk_rate = rate * 64 * 4;
	47	else
	48	mclk_rate = rate * 64 * 2;
86c33041	49
86c33041 AS	50	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
	51	SND_SOC_CLOCK_IN);
	52	if (err)
	53	return err;
	54
	55	return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
	56	SND_SOC_CLOCK_OUT);
	57	}
	58
	59	static struct snd_soc_ops edb93xx_ops = {
	60	.hw_params = edb93xx_hw_params,
	61	};
	62
	63	static struct snd_soc_dai_link edb93xx_dai = {
	64	.name = "CS4271",
	65	.stream_name = "CS4271 HiFi",
6f2032a1	66	.platform_name = "ep93xx-i2s",
86c33041 AS	67	.cpu_dai_name = "ep93xx-i2s",
	68	.codec_name = "spi0.0",
	69	.codec_dai_name = "cs4271-hifi",
f521812b AL	70	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_IF \|
f521812b AL	71	SND_SOC_DAIFMT_CBS_CFS,
86c33041 AS	72	.ops = &edb93xx_ops,
	73	};
	74
	75	static struct snd_soc_card snd_soc_edb93xx = {
	76	.name = "EDB93XX",
a76a7023	77	.owner = THIS_MODULE,
86c33041 AS	78	.dai_link = &edb93xx_dai,
	79	.num_links = 1,
	80	};
	81
145e2879	82	static int edb93xx_probe(struct platform_device *pdev)
86c33041	83	{
8a386ca2	84	struct snd_soc_card *card = &snd_soc_edb93xx;
86c33041 AS	85	int ret;
86c33041 AS	86
44fb864b	87	ret = ep93xx_i2s_acquire();
86c33041 AS	88	if (ret)
	89	return ret;
	90
8a386ca2 MW	91	card->dev = &pdev->dev;
	92
	93	ret = snd_soc_register_card(card);
	94	if (ret) {
	95	dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
	96	ret);
	97	ep93xx_i2s_release();
86c33041 AS	98	}
86c33041 AS	99
8a386ca2 MW	100	return ret;
8a386ca2 MW	101	}
86c33041	102
145e2879	103	static int edb93xx_remove(struct platform_device *pdev)
8a386ca2 MW	104	{
8a386ca2 MW	105	struct snd_soc_card *card = platform_get_drvdata(pdev);
86c33041	106
8a386ca2	107	snd_soc_unregister_card(card);
86c33041	108	ep93xx_i2s_release();
8a386ca2 MW	109
	110	return 0;
	111	}
	112
	113	static struct platform_driver edb93xx_driver = {
	114	.driver = {
	115	.name = "edb93xx-audio",
8a386ca2 MW	116	},
8a386ca2 MW	117	.probe = edb93xx_probe,
145e2879	118	.remove = edb93xx_remove,
8a386ca2 MW	119	};
8a386ca2 MW	120
ee18f631	121	module_platform_driver(edb93xx_driver);
86c33041 AS	122
	123	MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
	124	MODULE_DESCRIPTION("ALSA SoC EDB93xx");
	125	MODULE_LICENSE("GPL");
8a386ca2	126	MODULE_ALIAS("platform:edb93xx-audio");