[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"

#define edb93xx_has_audio() (machine_is_edb9301() ||	\
			     machine_is_edb9302() ||	\
			     machine_is_edb9302a() ||	\
			     machine_is_edb9307a() ||	\
			     machine_is_edb9315a())

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 struct platform_device *edb93xx_snd_device;

static int __init edb93xx_init(void)
{
	int ret;

	if (!edb93xx_has_audio())
		return -ENODEV;

	ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
				 EP93XX_SYSCON_I2SCLKDIV_ORIDE |
				 EP93XX_SYSCON_I2SCLKDIV_SPOL);
	if (ret)
		return ret;

	edb93xx_snd_device = platform_device_alloc("soc-audio", -1);
	if (!edb93xx_snd_device) {
		ret = -ENOMEM;
		goto free_i2s;
	}

	platform_set_drvdata(edb93xx_snd_device, &snd_soc_edb93xx);
	ret = platform_device_add(edb93xx_snd_device);
	if (ret)
		goto device_put;

	return 0;

device_put:
	platform_device_put(edb93xx_snd_device);
free_i2s:
	ep93xx_i2s_release();
	return ret;
}
module_init(edb93xx_init);

static void __exit edb93xx_exit(void)
{
	platform_device_unregister(edb93xx_snd_device);
	ep93xx_i2s_release();
}
module_exit(edb93xx_exit);

MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
MODULE_DESCRIPTION("ALSA SoC EDB93xx");
MODULE_LICENSE("GPL");
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
	31	#define edb93xx_has_audio() (machine_is_edb9301() \|\| \
	32	machine_is_edb9302() \|\| \
	33	machine_is_edb9302a() \|\| \
	34	machine_is_edb9307a() \|\| \
	35	machine_is_edb9315a())
	36
	37	static int edb93xx_hw_params(struct snd_pcm_substream *substream,
	38	struct snd_pcm_hw_params *params)
	39	{
	40	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	41	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	42	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	43	int err;
6d33cd77	44	unsigned int mclk_rate;
86c33041	45	unsigned int rate = params_rate(params);
6d33cd77	46
86c33041	47	/*
6d33cd77 AS	48	* According to CS4271 datasheet we use MCLK/LRCK=256 for
6d33cd77 AS	49	* rates below 50kHz and 128 for higher sample rates
86c33041	50	*/
6d33cd77 AS	51	if (rate < 50000)
	52	mclk_rate = rate * 64 * 4;
	53	else
	54	mclk_rate = rate * 64 * 2;
86c33041 AS	55
	56	err = snd_soc_dai_set_fmt(codec_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_fmt(cpu_dai, SND_SOC_DAIFMT_I2S \|
	63	SND_SOC_DAIFMT_NB_IF \|
	64	SND_SOC_DAIFMT_CBS_CFS);
	65	if (err)
	66	return err;
	67
	68	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
	69	SND_SOC_CLOCK_IN);
	70	if (err)
	71	return err;
	72
	73	return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
	74	SND_SOC_CLOCK_OUT);
	75	}
	76
	77	static struct snd_soc_ops edb93xx_ops = {
	78	.hw_params = edb93xx_hw_params,
	79	};
	80
	81	static struct snd_soc_dai_link edb93xx_dai = {
	82	.name = "CS4271",
	83	.stream_name = "CS4271 HiFi",
	84	.platform_name = "ep93xx-pcm-audio",
	85	.cpu_dai_name = "ep93xx-i2s",
	86	.codec_name = "spi0.0",
	87	.codec_dai_name = "cs4271-hifi",
	88	.ops = &edb93xx_ops,
	89	};
	90
	91	static struct snd_soc_card snd_soc_edb93xx = {
	92	.name = "EDB93XX",
	93	.dai_link = &edb93xx_dai,
	94	.num_links = 1,
	95	};
	96
	97	static struct platform_device *edb93xx_snd_device;
	98
	99	static int __init edb93xx_init(void)
	100	{
	101	int ret;
	102
	103	if (!edb93xx_has_audio())
	104	return -ENODEV;
	105
	106	ret = ep93xx_i2s_acquire(EP93XX_SYSCON_DEVCFG_I2SONAC97,
	107	EP93XX_SYSCON_I2SCLKDIV_ORIDE \|
	108	EP93XX_SYSCON_I2SCLKDIV_SPOL);
	109	if (ret)
	110	return ret;
	111
	112	edb93xx_snd_device = platform_device_alloc("soc-audio", -1);
	113	if (!edb93xx_snd_device) {
	114	ret = -ENOMEM;
	115	goto free_i2s;
	116	}
	117
	118	platform_set_drvdata(edb93xx_snd_device, &snd_soc_edb93xx);
119	ret = platform_device_add(edb93xx_snd_device);
120	if (ret)
121	goto device_put;
122
123	return 0;
124
125	device_put:
126	platform_device_put(edb93xx_snd_device);
127	free_i2s:
128	ep93xx_i2s_release();
129	return ret;
130	}
131	module_init(edb93xx_init);
132
133	static void __exit edb93xx_exit(void)
134	{
135	platform_device_unregister(edb93xx_snd_device);
136	ep93xx_i2s_release();
137	}
138	module_exit(edb93xx_exit);
139
140	MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
141	MODULE_DESCRIPTION("ALSA SoC EDB93xx");
142	MODULE_LICENSE("GPL");