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Commit 95169d08 authored by Marek Belisko's avatar Marek Belisko Committed by Mark Brown
Browse files

ASoC: Add PCM1681 codec driver. 



PCM1681 can be controlled via I2C, SPI or in bootstrap mode (no control mode). This code add
support only for I2C mode.

Signed-off-by: default avatarMarek Belisko <marek.belisko@streamunlimited.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 5ae90d8e

Documentation/devicetree/bindings/sound/ti,pcm1681.txt

0 → 100644
+15 −0
Original line number Diff line number Diff line 
Texas Instruments PCM1681 8-channel PWM Processor



Required properties:



 - compatible:		Should contain "ti,pcm1681".

 - reg:			The i2c address. Should contain <0x4c>.



Examples:



	i2c_bus {

		pcm1681@4c {

			compatible = "ti,pcm1681";

			reg = <0x4c>;

		};

	};

sound/soc/codecs/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -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_PCM1681 if I2C

	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_PCM1681

       tristate



config SND_SOC_PCM3008

       tristate

sound/soc/codecs/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -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-pcm1681-objs := pcm1681.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_PCM1681)	+= snd-soc-pcm1681.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/pcm1681.c

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+313 −0
Original line number Diff line number Diff line 
/*

 * PCM1681 ASoC codec driver

 *

 * Copyright (c) StreamUnlimited GmbH 2013

 *	Marek Belisko <marek.belisko@streamunlimited.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/delay.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/regmap.h>

#include <linux/of_device.h>

#include <linux/of_gpio.h>

#include <sound/pcm.h>

#include <sound/pcm_params.h>

#include <sound/soc.h>

#include <sound/tlv.h>



#define PCM1681_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE  |		\

			     SNDRV_PCM_FMTBIT_S24_LE)



#define PCM1681_PCM_RATES   (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | \

			     SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100  | \

			     SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200  | \

			     SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000)



#define PCM1681_SOFT_MUTE_ALL		0xff

#define PCM1681_DEEMPH_RATE_MASK	0x18

#define PCM1681_DEEMPH_MASK		0x01



#define PCM1681_ATT_CONTROL(X)	(X <= 6 ? X : X + 9) /* Attenuation level */

#define PCM1681_SOFT_MUTE	0x07	/* Soft mute control register */

#define PCM1681_DAC_CONTROL	0x08	/* DAC operation control */

#define PCM1681_FMT_CONTROL	0x09	/* Audio interface data format */

#define PCM1681_DEEMPH_CONTROL	0x0a	/* De-emphasis control */

#define PCM1681_ZERO_DETECT_STATUS	0x0e	/* Zero detect status reg */



static const struct reg_default pcm1681_reg_defaults[] = {

	{ 0x01,	0xff },

	{ 0x02,	0xff },

	{ 0x03,	0xff },

	{ 0x04,	0xff },

	{ 0x05,	0xff },

	{ 0x06,	0xff },

	{ 0x07,	0x00 },

	{ 0x08,	0x00 },

	{ 0x09,	0x06 },

	{ 0x0A,	0x00 },

	{ 0x0B,	0xff },

	{ 0x0C,	0x0f },

	{ 0x0D,	0x00 },

	{ 0x10,	0xff },

	{ 0x11,	0xff },

	{ 0x12,	0x00 },

	{ 0x13,	0x00 },

};



static bool pcm1681_accessible_reg(struct device *dev, unsigned int reg)

{

	return !((reg == 0x00) || (reg == 0x0f));

}



static bool pcm1681_writeable_reg(struct device *dev, unsigned register reg)

{

	return pcm1681_accessible_reg(dev, reg) &&

		(reg != PCM1681_ZERO_DETECT_STATUS);

}



struct pcm1681_private {

	struct regmap *regmap;

	unsigned int format;

	/* Current deemphasis status */

	unsigned int deemph;

	/* Current rate for deemphasis control */

	unsigned int rate;

};



static const int pcm1681_deemph[] = { 44100, 48000, 32000 };



static int pcm1681_set_deemph(struct snd_soc_codec *codec)

{

	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);

	int i = 0, val = -1, enable = 0;



	if (priv->deemph)

		for (i = 0; i < ARRAY_SIZE(pcm1681_deemph); i++)

			if (pcm1681_deemph[i] == priv->rate)

				val = i;



	if (val != -1) {

		regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,

					PCM1681_DEEMPH_RATE_MASK, val);

		enable = 1;

	} else

		enable = 0;



	/* enable/disable deemphasis functionality */

	return regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,

					PCM1681_DEEMPH_MASK, enable);

}



static int pcm1681_get_deemph(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);



	ucontrol->value.enumerated.item[0] = priv->deemph;



	return 0;

}



static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol,

			      struct snd_ctl_elem_value *ucontrol)

{

	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);

	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);



	priv->deemph = ucontrol->value.enumerated.item[0];



	return pcm1681_set_deemph(codec);

}



static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai,

			      unsigned int format)

{

	struct snd_soc_codec *codec = codec_dai->codec;

	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);



	/* The PCM1681 can only be slave to all clocks */

	if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {

		dev_err(codec->dev, "Invalid clocking mode\n");

		return -EINVAL;

	}



	priv->format = format;



	return 0;

}



static int pcm1681_digital_mute(struct snd_soc_dai *dai, int mute)

{

	struct snd_soc_codec *codec = dai->codec;

	struct pcm1681_private *priv = snd_soc_codec_get_drvdata(codec);

	int val;



	if (mute)

		val = PCM1681_SOFT_MUTE_ALL;

	else

		val = 0;



	return regmap_write(priv->regmap, PCM1681_SOFT_MUTE, val);

}



static int pcm1681_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 pcm1681_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)

			val = 0x00;

		else if (pcm_format == SNDRV_PCM_FORMAT_S16_LE)

			val = 0x03;

		break;

	case SND_SOC_DAIFMT_I2S:

		val = 0x04;

		break;

	case SND_SOC_DAIFMT_LEFT_J:

		val = 0x05;

		break;

	default:

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

		return -EINVAL;

	}



	ret = regmap_update_bits(priv->regmap, PCM1681_FMT_CONTROL, 0x0f, val);

	if (ret < 0)

		return ret;



	return pcm1681_set_deemph(codec);

}



static const struct snd_soc_dai_ops pcm1681_dai_ops = {

	.set_fmt	= pcm1681_set_dai_fmt,

	.hw_params	= pcm1681_hw_params,

	.digital_mute	= pcm1681_digital_mute,

};



static const DECLARE_TLV_DB_SCALE(pcm1681_dac_tlv, -6350, 50, 1);



static const struct snd_kcontrol_new pcm1681_controls[] = {

	SOC_DOUBLE_R_TLV("Channel 1/2 Playback Volume",

			PCM1681_ATT_CONTROL(1), PCM1681_ATT_CONTROL(2), 0,

			0x7f, 0, pcm1681_dac_tlv),

	SOC_DOUBLE_R_TLV("Channel 3/4 Playback Volume",

			PCM1681_ATT_CONTROL(3), PCM1681_ATT_CONTROL(4), 0,

			0x7f, 0, pcm1681_dac_tlv),

	SOC_DOUBLE_R_TLV("Channel 5/6 Playback Volume",

			PCM1681_ATT_CONTROL(5), PCM1681_ATT_CONTROL(6), 0,

			0x7f, 0, pcm1681_dac_tlv),

	SOC_DOUBLE_R_TLV("Channel 7/8 Playback Volume",

			PCM1681_ATT_CONTROL(7), PCM1681_ATT_CONTROL(8), 0,

			0x7f, 0, pcm1681_dac_tlv),

	SOC_SINGLE_BOOL_EXT("De-emphasis Switch", 0,

			    pcm1681_get_deemph, pcm1681_put_deemph),

};



struct snd_soc_dai_driver pcm1681_dai = {

	.name = "pcm1681-hifi",

	.playback = {

		.stream_name = "Playback",

		.channels_min = 2,

		.channels_max = 8,

		.rates = PCM1681_PCM_RATES,

		.formats = PCM1681_PCM_FORMATS,

	},

	.ops = &pcm1681_dai_ops,

};



#ifdef CONFIG_OF

static const struct of_device_id pcm1681_dt_ids[] = {

	{ .compatible = "ti,pcm1681", },

	{ }

};

MODULE_DEVICE_TABLE(of, pcm1681_dt_ids);

#endif



static const struct regmap_config pcm1681_regmap = {

	.reg_bits		= 8,

	.val_bits		= 8,

	.max_register		= ARRAY_SIZE(pcm1681_reg_defaults) + 1,

	.reg_defaults		= pcm1681_reg_defaults,

	.num_reg_defaults	= ARRAY_SIZE(pcm1681_reg_defaults),

	.writeable_reg		= pcm1681_writeable_reg,

	.readable_reg		= pcm1681_accessible_reg,

};



static struct snd_soc_codec_driver soc_codec_dev_pcm1681 = {

	.controls		= pcm1681_controls,

	.num_controls		= ARRAY_SIZE(pcm1681_controls),

};



static const struct i2c_device_id pcm1681_i2c_id[] = {

	{"pcm1681", 0},

	{}

};

MODULE_DEVICE_TABLE(i2c, pcm1681_i2c_id);



static int pcm1681_i2c_probe(struct i2c_client *client,

			      const struct i2c_device_id *id)

{

	int ret;

	struct pcm1681_private *priv;



	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	priv->regmap = devm_regmap_init_i2c(client, &pcm1681_regmap);

	if (IS_ERR(priv->regmap)) {

		ret = PTR_ERR(priv->regmap);

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

		return ret;

	}



	i2c_set_clientdata(client, priv);



	return snd_soc_register_codec(&client->dev, &soc_codec_dev_pcm1681,

		&pcm1681_dai, 1);

}



static int pcm1681_i2c_remove(struct i2c_client *client)

{

	snd_soc_unregister_codec(&client->dev);

	return 0;

}



static struct i2c_driver pcm1681_i2c_driver = {

	.driver = {

		.name	= "pcm1681",

		.owner	= THIS_MODULE,

		.of_match_table = of_match_ptr(pcm1681_dt_ids),

	},

	.id_table	= pcm1681_i2c_id,

	.probe		= pcm1681_i2c_probe,

	.remove		= pcm1681_i2c_remove,

};



module_i2c_driver(pcm1681_i2c_driver);



MODULE_DESCRIPTION("Texas Instruments PCM1681 ALSA SoC Codec Driver");

MODULE_AUTHOR("Marek Belisko <marek.belisko@streamunlimited.com>");

MODULE_LICENSE("GPL");