[deliverable/linux.git] / sound / soc / ep93xx / 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 <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include "ep93xx-pcm.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_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
				  SND_SOC_DAIFMT_NB_IF |
				  SND_SOC_DAIFMT_CBS_CFS);
	if (err)
		return err;

	err = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
				  SND_SOC_DAIFMT_NB_IF |
				  SND_SOC_DAIFMT_CBS_CFS);
	if (err)
		return err;

	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-pcm-audio",
	.cpu_dai_name	= "ep93xx-i2s",
	.codec_name	= "spi0.0",
	.codec_dai_name	= "cs4271-hifi",
	.ops		= &edb93xx_ops,
};

static struct snd_soc_card snd_soc_edb93xx = {
	.name		= "EDB93XX",
	.dai_link	= &edb93xx_dai,
	.num_links	= 1,
};

static int __devinit edb93xx_probe(struct platform_device *pdev)
{
	struct snd_soc_card *card = &snd_soc_edb93xx;
	int ret;

	ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
				 EP93XX_SYSCON_I2SCLKDIV_ORIDE |
				 EP93XX_SYSCON_I2SCLKDIV_SPOL);
	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 __devexit 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",
		.owner	= THIS_MODULE,
	},
	.probe		= edb93xx_probe,
	.remove		= __devexit_p(edb93xx_remove),
};

static int __init edb93xx_init(void)
{
	return platform_driver_register(&edb93xx_driver);
}
module_init(edb93xx_init);

static void __exit edb93xx_exit(void)
{
	platform_driver_unregister(&edb93xx_driver);
}
module_exit(edb93xx_exit);

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>
	24	#include <sound/core.h>
	25	#include <sound/pcm.h>
	26	#include <sound/soc.h>
	27	#include <asm/mach-types.h>
	28	#include <mach/hardware.h>
	29	#include "ep93xx-pcm.h"
	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 AS	49
	50	err = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S \|
	51	SND_SOC_DAIFMT_NB_IF \|
	52	SND_SOC_DAIFMT_CBS_CFS);
	53	if (err)
	54	return err;
	55
	56	err = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S \|
	57	SND_SOC_DAIFMT_NB_IF \|
	58	SND_SOC_DAIFMT_CBS_CFS);
	59	if (err)
	60	return err;
	61
	62	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
	63	SND_SOC_CLOCK_IN);
	64	if (err)
	65	return err;
	66
	67	return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
	68	SND_SOC_CLOCK_OUT);
	69	}
	70
	71	static struct snd_soc_ops edb93xx_ops = {
	72	.hw_params = edb93xx_hw_params,
	73	};
	74
	75	static struct snd_soc_dai_link edb93xx_dai = {
	76	.name = "CS4271",
	77	.stream_name = "CS4271 HiFi",
	78	.platform_name = "ep93xx-pcm-audio",
	79	.cpu_dai_name = "ep93xx-i2s",
	80	.codec_name = "spi0.0",
	81	.codec_dai_name = "cs4271-hifi",
	82	.ops = &edb93xx_ops,
	83	};
	84
	85	static struct snd_soc_card snd_soc_edb93xx = {
	86	.name = "EDB93XX",
	87	.dai_link = &edb93xx_dai,
	88	.num_links = 1,
	89	};
	90
8a386ca2	91	static int __devinit edb93xx_probe(struct platform_device *pdev)
86c33041	92	{
8a386ca2	93	struct snd_soc_card *card = &snd_soc_edb93xx;
86c33041 AS	94	int ret;
86c33041 AS	95
86c33041 AS	96	ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
	97	EP93XX_SYSCON_I2SCLKDIV_ORIDE \|
	98	EP93XX_SYSCON_I2SCLKDIV_SPOL);
	99	if (ret)
	100	return ret;
	101
8a386ca2 MW	102	card->dev = &pdev->dev;
	103
	104	ret = snd_soc_register_card(card);
	105	if (ret) {
	106	dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
	107	ret);
	108	ep93xx_i2s_release();
86c33041 AS	109	}
86c33041 AS	110
8a386ca2 MW	111	return ret;
8a386ca2 MW	112	}
86c33041	113
8a386ca2 MW	114	static int __devexit edb93xx_remove(struct platform_device *pdev)
	115	{
	116	struct snd_soc_card *card = platform_get_drvdata(pdev);
86c33041	117
8a386ca2	118	snd_soc_unregister_card(card);
86c33041	119	ep93xx_i2s_release();
8a386ca2 MW	120
	121	return 0;
	122	}
	123
	124	static struct platform_driver edb93xx_driver = {
	125	.driver = {
	126	.name = "edb93xx-audio",
	127	.owner = THIS_MODULE,
	128	},
	129	.probe = edb93xx_probe,
	130	.remove = __devexit_p(edb93xx_remove),
	131	};
	132
	133	static int __init edb93xx_init(void)
	134	{
	135	return platform_driver_register(&edb93xx_driver);
86c33041 AS	136	}
	137	module_init(edb93xx_init);
	138
	139	static void __exit edb93xx_exit(void)
	140	{
8a386ca2	141	platform_driver_unregister(&edb93xx_driver);
86c33041 AS	142	}
	143	module_exit(edb93xx_exit);
	144
	145	MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
	146	MODULE_DESCRIPTION("ALSA SoC EDB93xx");
	147	MODULE_LICENSE("GPL");
8a386ca2	148	MODULE_ALIAS("platform:edb93xx-audio");