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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.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;
priv->rate = params_rate(params);
switch (priv->format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_RIGHT_J:
switch (params_width(params)) {
case 24:
case 32:
val = 2;
break;
case 16:
val = 0;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
switch (params_width(params)) {
case 24:
case 32:
val = 5;
break;
case 16:
val = 4;
break;
default:
return -EINVAL;
}
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 const struct snd_soc_dapm_widget pcm1792a_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("IOUTL+"),
SND_SOC_DAPM_OUTPUT("IOUTL-"),
SND_SOC_DAPM_OUTPUT("IOUTR+"),
SND_SOC_DAPM_OUTPUT("IOUTR-"),
};
static const struct snd_soc_dapm_route pcm1792a_dapm_routes[] = {
{ "IOUTL+", NULL, "Playback" },
{ "IOUTL-", NULL, "Playback" },
{ "IOUTR+", NULL, "Playback" },
{ "IOUTR-", NULL, "Playback" },
};
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, },
.ops = &pcm1792a_dai_ops,
};
static const struct of_device_id pcm1792a_of_match[] = {
{ .compatible = "ti,pcm1792a", },
{ }
};
MODULE_DEVICE_TABLE(of, pcm1792a_of_match);
static const struct regmap_config pcm1792a_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 23,
.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),
.dapm_widgets = pcm1792a_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(pcm1792a_dapm_widgets),
.dapm_routes = pcm1792a_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(pcm1792a_dapm_routes),
};
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 = of_match_ptr(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");
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