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Commit 13b02fa0 authored by Michael Trimarchi's avatar Michael Trimarchi Committed by Mark Brown
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ASoC: Add PCM1792A spi mode codec support 



Add PCM1792A spi mode codec support. This version implements only
a subset of functionalities. Tested connect to a pandaboard ES
device and based on recently pcm1681 codec.

Signed-off-by: default avatarMichael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent c095ba72

Documentation/devicetree/bindings/sound/pcm1792a.txt

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Texas Instruments pcm1792a DT bindings



This driver supports the SPI bus.



Required properties:



 - compatible: "ti,pcm1792a"



For required properties on SPI, please consult

Documentation/devicetree/bindings/spi/spi-bus.txt



Examples:



	codec_spi: 1792a@0 {

		compatible = "ti,pcm1792a";

		spi-max-frequency = <600000>;

	};

sound/soc/codecs/Kconfig

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@@ -54,6 +54,7 @@ config SND_SOC_ALL_CODECS 
	select SND_SOC_MC13783 if MFD_MC13XXX

	select SND_SOC_ML26124 if I2C

	select SND_SOC_HDMI_CODEC

	select SND_SOC_PCM1792A if SPI_MASTER

	select SND_SOC_PCM3008

	select SND_SOC_RT5631 if I2C

	select SND_SOC_RT5640 if I2C
@@ -292,6 +293,9 @@ config SND_SOC_MAX9850 
config SND_SOC_HDMI_CODEC

       tristate



config SND_SOC_PCM1792A

       tristate



config SND_SOC_PCM3008

       tristate

sound/soc/codecs/Makefile

+2 −0
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@@ -42,6 +42,7 @@ snd-soc-max9850-objs := max9850.o 
snd-soc-mc13783-objs := mc13783.o

snd-soc-ml26124-objs := ml26124.o

snd-soc-hdmi-codec-objs := hdmi.o

snd-soc-pcm1792a-codec-objs := pcm1792a.o

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

snd-soc-rt5631-objs := rt5631.o

snd-soc-rt5640-objs := rt5640.o
@@ -171,6 +172,7 @@ obj-$(CONFIG_SND_SOC_MAX9850) += snd-soc-max9850.o 
obj-$(CONFIG_SND_SOC_MC13783)	+= snd-soc-mc13783.o

obj-$(CONFIG_SND_SOC_ML26124)	+= snd-soc-ml26124.o

obj-$(CONFIG_SND_SOC_HDMI_CODEC) += snd-soc-hdmi-codec.o

obj-$(CONFIG_SND_SOC_PCM1792A)	+= snd-soc-pcm1792a-codec.o

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

obj-$(CONFIG_SND_SOC_RT5631)	+= snd-soc-rt5631.o

obj-$(CONFIG_SND_SOC_RT5640)	+= snd-soc-rt5640.o

sound/soc/codecs/pcm1792a.c

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/*

 * PCM1792A ASoC codec driver

 *

 * Copyright (c) Amarula Solutions B.V. 2013

 *

 *     Michael Trimarchi <michael@amarulasolutions.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.

 *

 * 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.

 */



#include <linux/module.h>

#include <linux/slab.h>

#include <linux/kernel.h>

#include <linux/device.h>

#include <linux/spi/spi.h>



#include <sound/core.h>

#include <sound/pcm.h>

#include <sound/pcm_params.h>

#include <sound/initval.h>

#include <sound/soc.h>

#include <sound/tlv.h>

#include <linux/of_device.h>



#include "pcm1792a.h"



#define PCM1792A_DAC_VOL_LEFT	0x10

#define PCM1792A_DAC_VOL_RIGHT	0x11

#define PCM1792A_FMT_CONTROL	0x12

#define PCM1792A_SOFT_MUTE	PCM1792A_FMT_CONTROL



#define PCM1792A_FMT_MASK	0x70

#define PCM1792A_FMT_SHIFT	4

#define PCM1792A_MUTE_MASK	0x01

#define PCM1792A_MUTE_SHIFT	0

#define PCM1792A_ATLD_ENABLE	(1 << 7)



static const struct reg_default pcm1792a_reg_defaults[] = {

	{ 0x10, 0xff },

	{ 0x11, 0xff },

	{ 0x12, 0x50 },

	{ 0x13, 0x00 },

	{ 0x14, 0x00 },

	{ 0x15, 0x01 },

	{ 0x16, 0x00 },

	{ 0x17, 0x00 },

};



static bool pcm1792a_accessible_reg(struct device *dev, unsigned int reg)

{

	return reg >= 0x10 && reg <= 0x17;

}



static bool pcm1792a_writeable_reg(struct device *dev, unsigned register reg)

{

	bool accessible;



	accessible = pcm1792a_accessible_reg(dev, reg);



	return accessible && reg != 0x16 && reg != 0x17;

}



struct pcm1792a_private {

	struct regmap *regmap;

	unsigned int format;

	unsigned int rate;

};



static int pcm1792a_set_dai_fmt(struct snd_soc_dai *codec_dai,

                             unsigned int format)

{

	struct snd_soc_codec *codec = codec_dai->codec;

	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);



	priv->format = format;



	return 0;

}



static int pcm1792a_digital_mute(struct snd_soc_dai *dai, int mute)

{

	struct snd_soc_codec *codec = dai->codec;

	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);

	int ret;



	ret = regmap_update_bits(priv->regmap, PCM1792A_SOFT_MUTE,

				 PCM1792A_MUTE_MASK, !!mute);

	if (ret < 0)

		return ret;



	return 0;

}



static int pcm1792a_hw_params(struct snd_pcm_substream *substream,

			     struct snd_pcm_hw_params *params,

			     struct snd_soc_dai *dai)

{

	struct snd_soc_codec *codec = dai->codec;

	struct pcm1792a_private *priv = snd_soc_codec_get_drvdata(codec);

	int val = 0, ret;

	int pcm_format = params_format(params);



	priv->rate = params_rate(params);



	switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {

	case SND_SOC_DAIFMT_RIGHT_J:

		if (pcm_format == SNDRV_PCM_FORMAT_S24_LE ||

		    pcm_format == SNDRV_PCM_FORMAT_S32_LE)

			val = 0x02;

		else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE)

			val = 0x00;

		break;

	case SND_SOC_DAIFMT_I2S:

		if (pcm_format == SNDRV_PCM_FORMAT_S24_LE ||

		    pcm_format == SNDRV_PCM_FORMAT_S32_LE)

			val = 0x05;

		else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE)

			val = 0x04;

		break;

	default:

		dev_err(codec->dev, "Invalid DAI format\n");

		return -EINVAL;

	}



	val = val << PCM1792A_FMT_SHIFT | PCM1792A_ATLD_ENABLE;



	ret = regmap_update_bits(priv->regmap, PCM1792A_FMT_CONTROL,

				 PCM1792A_FMT_MASK | PCM1792A_ATLD_ENABLE, val);

	if (ret < 0)

		return ret;



	return 0;

}



static const struct snd_soc_dai_ops pcm1792a_dai_ops = {

	.set_fmt	= pcm1792a_set_dai_fmt,

	.hw_params	= pcm1792a_hw_params,

	.digital_mute	= pcm1792a_digital_mute,

};



static const DECLARE_TLV_DB_SCALE(pcm1792a_dac_tlv, -12000, 50, 1);



static const struct snd_kcontrol_new pcm1792a_controls[] = {

	SOC_DOUBLE_R_RANGE_TLV("DAC Playback Volume", PCM1792A_DAC_VOL_LEFT,

			 PCM1792A_DAC_VOL_RIGHT, 0, 0xf, 0xff, 0,

			 pcm1792a_dac_tlv),

};



static struct snd_soc_dai_driver pcm1792a_dai = {

	.name = "pcm1792a-hifi",

	.playback = {

		.stream_name = "Playback",

		.channels_min = 2,

		.channels_max = 2,

		.rates = PCM1792A_RATES,

		.formats = PCM1792A_FORMATS, },

	.capture = {

		.channels_min = 0,

		.channels_max = 0,

	},

	.ops = &pcm1792a_dai_ops,

};



#ifdef CONFIG_OF

static const struct of_device_id pcm1792a_of_match[] = {

	{ .compatible = "ti,pcm1792a", },

	{ }

};

MODULE_DEVICE_TABLE(of, pcm1792a_of_match);

#endif



static const struct regmap_config pcm1792a_regmap = {

	.reg_bits		= 8,

	.val_bits		= 8,

	.max_register		= 24,

	.reg_defaults		= pcm1792a_reg_defaults,

	.num_reg_defaults	= ARRAY_SIZE(pcm1792a_reg_defaults),

	.writeable_reg		= pcm1792a_writeable_reg,

	.readable_reg		= pcm1792a_accessible_reg,

};



static struct snd_soc_codec_driver soc_codec_dev_pcm1792a = {

	.controls		= pcm1792a_controls,

	.num_controls		= ARRAY_SIZE(pcm1792a_controls),

};



static int pcm1792a_spi_probe(struct spi_device *spi)

{

	struct pcm1792a_private *pcm1792a;

	int ret;



	pcm1792a = devm_kzalloc(&spi->dev, sizeof(struct pcm1792a_private),

				GFP_KERNEL);

	if (!pcm1792a)

		return -ENOMEM;



	spi_set_drvdata(spi, pcm1792a);



	pcm1792a->regmap = devm_regmap_init_spi(spi, &pcm1792a_regmap);

	if (IS_ERR(pcm1792a->regmap)) {

		ret = PTR_ERR(pcm1792a->regmap);

		dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);

		return ret;

	}



	return snd_soc_register_codec(&spi->dev,

			&soc_codec_dev_pcm1792a, &pcm1792a_dai, 1);

}



static int pcm1792a_spi_remove(struct spi_device *spi)

{

	snd_soc_unregister_codec(&spi->dev);

	return 0;

}



static const struct spi_device_id pcm1792a_spi_ids[] = {

	{ "pcm1792a", 0 },

	{ },

};

MODULE_DEVICE_TABLE(spi, pcm1792a_spi_ids);



static struct spi_driver pcm1792a_codec_driver = {

	.driver = {

		.name = "pcm1792a",

		.owner = THIS_MODULE,

		.of_match_table = pcm1792a_of_match,

	},

	.id_table = pcm1792a_spi_ids,

	.probe = pcm1792a_spi_probe,

	.remove = pcm1792a_spi_remove,

};



module_spi_driver(pcm1792a_codec_driver);



MODULE_DESCRIPTION("ASoC PCM1792A driver");

MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");

MODULE_LICENSE("GPL");

sound/soc/codecs/pcm1792a.h

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/*

 * definitions for PCM1792A

 *

 * Copyright 2013 Amarula Solutions

 *

  * 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.

 */



#ifndef __PCM1792A_H__

#define __PCM1792A_H__



#define PCM1792A_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_8000_48000 | \

			SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000)



#define PCM1792A_FORMATS (SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S24_LE | \

			  SNDRV_PCM_FMTBIT_S16_LE)



#endif