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Commit 74d04c3e authored by Thomas Petazzoni's avatar Thomas Petazzoni Committed by Mark Brown
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sound: ASoC: add ASoC board driver for Armada 370 DB 



This commit adds a simple ASoC board driver fo the Armada 370
Development Board, which connects the audio unit of the Armada 370 SoC
to the I2C-based CS42L51.

For now, only the analog audio input and output through the CS42L51
are supported, but a followup patch adds S/PDIF support to this
driver.

Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 9a0d5113

Documentation/devicetree/bindings/sound/armada-370db-audio.txt

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Device Tree bindings for the Armada 370 DB audio

================================================



These Device Tree bindings are used to describe the audio complex

found on the Armada 370 DB platform.



Mandatory properties:



 * compatible: must be "marvell,a370db-audio"



 * marvell,audio-controller: a phandle that points to the audio

   controller of the Armada 370 SoC.



 * marvell,audio-codec: a phandle that points to the analog audio

   codec connected to the Armada 370 SoC.



Example:



	sound {

	      compatible = "marvell,a370db-audio";

	      marvell,audio-controller = <&audio_controller>;

	      marvell,audio-codec = <&audio_codec>;

	      status = "okay";

	};

sound/soc/kirkwood/Kconfig

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@@ -6,6 +6,14 @@ config SND_KIRKWOOD_SOC 
	  the Kirkwood I2S interface. You will also need to select the

	  audio interfaces to support below.



config SND_KIRKWOOD_SOC_ARMADA370_DB

	tristate "SoC Audio support for Armada 370 DB"

	depends on SND_KIRKWOOD_SOC && (ARCH_MVEBU || COMPILE_TEST) && I2C

	select SND_SOC_CS42L51

	help

	  Say Y if you want to add support for SoC audio on

	  the Armada 370 Development Board.



config SND_KIRKWOOD_SOC_OPENRD

	tristate "SoC Audio support for Kirkwood Openrd Client"

	depends on SND_KIRKWOOD_SOC && (MACH_OPENRD_CLIENT || MACH_OPENRD_ULTIMATE || COMPILE_TEST)

sound/soc/kirkwood/Makefile

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@@ -4,6 +4,8 @@ obj-$(CONFIG_SND_KIRKWOOD_SOC) += snd-soc-kirkwood.o 


snd-soc-openrd-objs := kirkwood-openrd.o

snd-soc-t5325-objs := kirkwood-t5325.o

snd-soc-armada-370-db-objs := armada-370-db.o



obj-$(CONFIG_SND_KIRKWOOD_SOC_ARMADA370_DB) += snd-soc-armada-370-db.o

obj-$(CONFIG_SND_KIRKWOOD_SOC_OPENRD) += snd-soc-openrd.o

obj-$(CONFIG_SND_KIRKWOOD_SOC_T5325) += snd-soc-t5325.o

sound/soc/kirkwood/armada-370-db.c

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/*

 * Copyright (C) 2014 Marvell

 *

 * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

 *

 * 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.

 */



#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <sound/soc.h>

#include <linux/of.h>

#include <linux/platform_data/asoc-kirkwood.h>

#include "../codecs/cs42l51.h"



static int a370db_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;

	unsigned int freq;



	switch (params_rate(params)) {

	default:

	case 44100:

		freq = 11289600;

		break;

	case 48000:

		freq = 12288000;

		break;

	case 96000:

		freq = 24576000;

		break;

	}



	return snd_soc_dai_set_sysclk(codec_dai, 0, freq, SND_SOC_CLOCK_IN);

}



static struct snd_soc_ops a370db_ops = {

	.hw_params = a370db_hw_params,

};



static const struct snd_soc_dapm_widget a370db_dapm_widgets[] = {

	SND_SOC_DAPM_HP("Out Jack", NULL),

	SND_SOC_DAPM_LINE("In Jack", NULL),

};



static const struct snd_soc_dapm_route a370db_route[] = {

	{ "Out Jack",	NULL,	"HPL" },

	{ "Out Jack",	NULL,	"HPR" },

	{ "AIN1L",	NULL,	"In Jack" },

	{ "AIN1L",	NULL,	"In Jack" },

};



static struct snd_soc_dai_link a370db_dai[] = {

{

	.name = "CS42L51",

	.stream_name = "analog",

	.cpu_dai_name = "i2s",

	.codec_dai_name = "cs42l51-hifi",

	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS,

	.ops = &a370db_ops,

},

};



static struct snd_soc_card a370db = {

	.name = "a370db",

	.owner = THIS_MODULE,

	.dai_link = a370db_dai,

	.num_links = ARRAY_SIZE(a370db_dai),

	.dapm_widgets = a370db_dapm_widgets,

	.num_dapm_widgets = ARRAY_SIZE(a370db_dapm_widgets),

	.dapm_routes = a370db_route,

	.num_dapm_routes = ARRAY_SIZE(a370db_route),

};



static int a370db_probe(struct platform_device *pdev)

{

	struct snd_soc_card *card = &a370db;



	card->dev = &pdev->dev;



	a370db_dai[0].cpu_of_node =

		of_parse_phandle(pdev->dev.of_node,

				 "marvell,audio-controller", 0);

	a370db_dai[0].platform_of_node = a370db_dai[0].cpu_of_node;



	a370db_dai[0].codec_of_node =

		of_parse_phandle(pdev->dev.of_node,

				 "marvell,audio-codec", 0);



	return devm_snd_soc_register_card(card->dev, card);

}



static const struct of_device_id a370db_dt_ids[] = {

	{ .compatible = "marvell,a370db-audio" },

	{ },

};



static struct platform_driver a370db_driver = {

	.driver		= {

		.name	= "a370db-audio",

		.owner	= THIS_MODULE,

		.of_match_table = of_match_ptr(a370db_dt_ids),

	},

	.probe		= a370db_probe,

};



module_platform_driver(a370db_driver);



MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>");

MODULE_DESCRIPTION("ALSA SoC a370db audio client");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:a370db-audio");