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Commit 1c0090c2 authored by Hugo Villeneuve's avatar Hugo Villeneuve Committed by Mark Brown
Browse files

ASoC: Add PCM3008 ALSA SoC driver 



The PCM3008 is a 16-bit stereo audio codec. It accepts
left-justified format for ADC, and right-justified format
for DAC. Independent power-down modes for ADC and DAC are
provided, as well as a digital de-emphasis filter (4 modes).

[Merged Makefile & Kconfig, changed asm/gpio.h to linux/gpio.h -- broonie]

Signed-off-by: default avatarHugo Villeneuve <hugo@hugovil.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent ca3ea02e

sound/soc/codecs/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_AD73311 if I2C

	select SND_SOC_AK4535 if I2C

	select SND_SOC_CS4270 if I2C

	select SND_SOC_PCM3008

	select SND_SOC_SSM2602 if I2C

	select SND_SOC_TLV320AIC23 if I2C

	select SND_SOC_TLV320AIC26 if SPI_MASTER
@@ -70,6 +71,9 @@ config SND_SOC_CS4270_VD33_ERRATA 
config SND_SOC_L3

       tristate



config SND_SOC_PCM3008

       tristate



config SND_SOC_SSM2602

	tristate

sound/soc/codecs/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ snd-soc-ad73311-objs := ad73311.o 
snd-soc-ak4535-objs := ak4535.o

snd-soc-cs4270-objs := cs4270.o

snd-soc-l3-objs := l3.o

snd-soc-pcm3008-objs := pcm3008.o

snd-soc-ssm2602-objs := ssm2602.o

snd-soc-tlv320aic23-objs := tlv320aic23.o

snd-soc-tlv320aic26-objs := tlv320aic26.o
@@ -30,6 +31,7 @@ obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o 
obj-$(CONFIG_SND_SOC_AK4535)	+= snd-soc-ak4535.o

obj-$(CONFIG_SND_SOC_CS4270)	+= snd-soc-cs4270.o

obj-$(CONFIG_SND_SOC_L3)	+= snd-soc-l3.o

obj-$(CONFIG_SND_SOC_PCM3008)	+= snd-soc-pcm3008.o

obj-$(CONFIG_SND_SOC_SSM2602)	+= snd-soc-ssm2602.o

obj-$(CONFIG_SND_SOC_TLV320AIC23)	+= snd-soc-tlv320aic23.o

obj-$(CONFIG_SND_SOC_TLV320AIC26)	+= snd-soc-tlv320aic26.o

sound/soc/codecs/pcm3008.c

0 → 100644
+201 −0
Original line number Diff line number Diff line 
/*

 * ALSA Soc PCM3008 codec support

 *

 * Author:	Hugo Villeneuve

 * Copyright (C) 2008 Lyrtech inc

 *

 * Based on AC97 Soc codec, original copyright follow:

 * Copyright 2005 Wolfson Microelectronics PLC.

 *

 *  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.

 *

 * Generic PCM3008 support.

 */



#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/device.h>

#include <linux/gpio.h>

#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/initval.h>

#include <sound/soc.h>



#include "pcm3008.h"



#define PCM3008_VERSION "0.2"



#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |	\

		       SNDRV_PCM_RATE_48000)



struct snd_soc_dai pcm3008_dai = {

	.name = "PCM3008 HiFi",

	.type = SND_SOC_DAI_I2S,

	.playback = {

		.stream_name = "PCM3008 Playback",

		.channels_min = 1,

		.channels_max = 2,

		.rates = PCM3008_RATES,

		.formats = SNDRV_PCM_FMTBIT_S16_LE,

	},

	.capture = {

		.stream_name = "PCM3008 Capture",

		.channels_min = 1,

		.channels_max = 2,

		.rates = PCM3008_RATES,

		.formats = SNDRV_PCM_FMTBIT_S16_LE,

	},

};

EXPORT_SYMBOL_GPL(pcm3008_dai);



static void pcm3008_gpio_free(struct pcm3008_setup_data *setup)

{

	gpio_free(setup->dem0_pin);

	gpio_free(setup->dem1_pin);

	gpio_free(setup->pdad_pin);

	gpio_free(setup->pdda_pin);

}



static int pcm3008_soc_probe(struct platform_device *pdev)

{

	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	struct snd_soc_codec *codec;

	struct pcm3008_setup_data *setup = socdev->codec_data;

	int ret = 0;



	printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);



	socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);

	if (!socdev->codec)

		return -ENOMEM;



	codec = socdev->codec;

	mutex_init(&codec->mutex);



	codec->name = "PCM3008";

	codec->owner = THIS_MODULE;

	codec->dai = &pcm3008_dai;

	codec->num_dai = 1;

	codec->write = NULL;

	codec->read = NULL;

	INIT_LIST_HEAD(&codec->dapm_widgets);

	INIT_LIST_HEAD(&codec->dapm_paths);



	/* Register PCMs. */

	ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);

	if (ret < 0) {

		printk(KERN_ERR "pcm3008: failed to create pcms\n");

		goto pcm_err;

	}



	/* Register Card. */

	ret = snd_soc_register_card(socdev);

	if (ret < 0) {

		printk(KERN_ERR "pcm3008: failed to register card\n");

		goto card_err;

	}



	/* DEM1  DEM0  DE-EMPHASIS_MODE

	 * Low   Low   De-emphasis 44.1 kHz ON

	 * Low   High  De-emphasis OFF

	 * High  Low   De-emphasis 48 kHz ON

	 * High  High  De-emphasis 32 kHz ON

	 */



	/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */

	ret = gpio_request(setup->dem0_pin, "codec_dem0");

	if (ret == 0)

		ret = gpio_direction_output(setup->dem0_pin, 1);

	if (ret != 0)

		goto gpio_err;



	/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */

	ret = gpio_request(setup->dem1_pin, "codec_dem1");

	if (ret == 0)

		ret = gpio_direction_output(setup->dem1_pin, 0);

	if (ret != 0)

		goto gpio_err;



	/* Configure PDAD GPIO. */

	ret = gpio_request(setup->pdad_pin, "codec_pdad");

	if (ret == 0)

		ret = gpio_direction_output(setup->pdad_pin, 1);

	if (ret != 0)

		goto gpio_err;



	/* Configure PDDA GPIO. */

	ret = gpio_request(setup->pdda_pin, "codec_pdda");

	if (ret == 0)

		ret = gpio_direction_output(setup->pdda_pin, 1);

	if (ret != 0)

		goto gpio_err;



	return ret;



gpio_err:

	pcm3008_gpio_free(setup);

card_err:

	snd_soc_free_pcms(socdev);

pcm_err:

	kfree(socdev->codec);



	return ret;

}



static int pcm3008_soc_remove(struct platform_device *pdev)

{

	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	struct snd_soc_codec *codec = socdev->codec;

	struct pcm3008_setup_data *setup = socdev->codec_data;



	if (!codec)

		return 0;



	pcm3008_gpio_free(setup);

	snd_soc_free_pcms(socdev);

	kfree(socdev->codec);



	return 0;

}



#ifdef CONFIG_PM

static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg)

{

	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	struct pcm3008_setup_data *setup = socdev->codec_data;



	gpio_set_value(setup->pdad_pin, 0);

	gpio_set_value(setup->pdda_pin, 0);



	return 0;

}



static int pcm3008_soc_resume(struct platform_device *pdev)

{

	struct snd_soc_device *socdev = platform_get_drvdata(pdev);

	struct pcm3008_setup_data *setup = socdev->codec_data;



	gpio_set_value(setup->pdad_pin, 1);

	gpio_set_value(setup->pdda_pin, 1);



	return 0;

}

#else

#define pcm3008_soc_suspend NULL

#define pcm3008_soc_resume NULL

#endif



struct snd_soc_codec_device soc_codec_dev_pcm3008 = {

	.probe = 	pcm3008_soc_probe,

	.remove = 	pcm3008_soc_remove,

	.suspend =	pcm3008_soc_suspend,

	.resume =	pcm3008_soc_resume,

};

EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008);



MODULE_DESCRIPTION("Soc PCM3008 driver");

MODULE_AUTHOR("Hugo Villeneuve");

MODULE_LICENSE("GPL");

sound/soc/codecs/pcm3008.h

0 → 100644
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/*

 * PCM3008 ALSA SoC Layer

 *

 * Author:	Hugo Villeneuve

 * Copyright (C) 2008 Lyrtech inc

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */



#ifndef __LINUX_SND_SOC_PCM3008_H

#define __LINUX_SND_SOC_PCM3008_H



struct pcm3008_setup_data {

	unsigned dem0_pin;

	unsigned dem1_pin;

	unsigned pdad_pin;

	unsigned pdda_pin;

};



extern struct snd_soc_codec_device soc_codec_dev_pcm3008;

extern struct snd_soc_dai pcm3008_dai;



#endif