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Commit 86c33041 authored by Alexander Sverdlin's avatar Alexander Sverdlin Committed by Mark Brown
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ASoC: EDB93xx machine sound driver with CS4271 



Added support for EDB93xx sound with CS4271 CODEC.
Features:
- Playback, Capture
- Sample rates from 8kHz to 96kHz tested

Signed-off-by: default avatarAlexander Sverdlin <subaparts@yandex.ru>
Acked-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 4d805f7b

sound/soc/ep93xx/Kconfig

+9 −0
Original line number Original line Diff line number Diff line
@@ -30,3 +30,12 @@ config SND_EP93XX_SOC_SIMONE 
	help

	help

	  Say Y or M here if you want to add support for AC97 audio on the

	  Say Y or M here if you want to add support for AC97 audio on the

	  Simplemachines Sim.One board.

	  Simplemachines Sim.One board.



config SND_EP93XX_SOC_EDB93XX

	tristate "SoC Audio support for Cirrus Logic EDB93xx boards"

	depends on SND_EP93XX_SOC && (MACH_EDB9301 || MACH_EDB9302 || MACH_EDB9302A || MACH_EDB9307A || MACH_EDB9315A)

	select SND_EP93XX_SOC_I2S

	select SND_SOC_CS4271

	help

	  Say Y or M here if you want to add support for I2S audio on the

	  Cirrus Logic EDB93xx boards.

sound/soc/ep93xx/Makefile

+2 −0
Original line number Original line Diff line number Diff line
@@ -10,6 +10,8 @@ obj-$(CONFIG_SND_EP93XX_SOC_AC97) += snd-soc-ep93xx-ac97.o 
# EP93XX Machine Support

# EP93XX Machine Support

snd-soc-snappercl15-objs			:= snappercl15.o

snd-soc-snappercl15-objs			:= snappercl15.o

snd-soc-simone-objs				:= simone.o

snd-soc-simone-objs				:= simone.o

snd-soc-edb93xx-objs				:= edb93xx.o





obj-$(CONFIG_SND_EP93XX_SOC_SNAPPERCL15)	+= snd-soc-snappercl15.o

obj-$(CONFIG_SND_EP93XX_SOC_SNAPPERCL15)	+= snd-soc-snappercl15.o

obj-$(CONFIG_SND_EP93XX_SOC_SIMONE)		+= snd-soc-simone.o

obj-$(CONFIG_SND_EP93XX_SOC_SIMONE)		+= snd-soc-simone.o

obj-$(CONFIG_SND_EP93XX_SOC_EDB93XX)		+= snd-soc-edb93xx.o

sound/soc/ep93xx/edb93xx.c

0 → 100644
+142 −0
Original line number Original line Diff line number Diff line 
/*

 * 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 rate = params_rate(params);

	/*

	 * We set LRCLK equal to `rate' and SCLK = LRCLK * 64,

	 * because our sample size is 32 bit * 2 channels.

	 * I2S standard permits us to transmit more bits than

	 * the codec uses.

	 * MCLK = SCLK * 4 is the best recommended value,

	 * but we have to fall back to ratio 2 for higher

	 * sample rates.

	 */

	unsigned int mclk_rate = rate * 64 * ((rate <= 48000) ? 4 : 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");