/*
* 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.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 int 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_component *component)
{
struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
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;
break;
}
}
}
if (val != -1) {
regmap_update_bits(priv->regmap, PCM1681_DEEMPH_CONTROL,
PCM1681_DEEMPH_RATE_MASK, val << 3);
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_component *component = snd_soc_kcontrol_component(kcontrol);
struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
ucontrol->value.integer.value[0] = priv->deemph;
return 0;
}
static int pcm1681_put_deemph(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
priv->deemph = ucontrol->value.integer.value[0];
return pcm1681_set_deemph(component);
}
static int pcm1681_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_component *component = codec_dai->component;
struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
/* The PCM1681 can only be slave to all clocks */
if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) {
dev_err(component->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_component *component = dai->component;
struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
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_component *component = dai->component;
struct pcm1681_private *priv = snd_soc_component_get_drvdata(component);
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:
val = 0;
break;
case 16:
val = 3;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
val = 0x04;
break;
case SND_SOC_DAIFMT_LEFT_J:
val = 0x05;
break;
default:
dev_err(component->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(component);
}
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 struct snd_soc_dapm_widget pcm1681_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("VOUT1"),
SND_SOC_DAPM_OUTPUT("VOUT2"),
SND_SOC_DAPM_OUTPUT("VOUT3"),
SND_SOC_DAPM_OUTPUT("VOUT4"),
SND_SOC_DAPM_OUTPUT("VOUT5"),
SND_SOC_DAPM_OUTPUT("VOUT6"),
SND_SOC_DAPM_OUTPUT("VOUT7"),
SND_SOC_DAPM_OUTPUT("VOUT8"),
};
static const struct snd_soc_dapm_route pcm1681_dapm_routes[] = {
{ "VOUT1", NULL, "Playback" },
{ "VOUT2", NULL, "Playback" },
{ "VOUT3", NULL, "Playback" },
{ "VOUT4", NULL, "Playback" },
{ "VOUT5", NULL, "Playback" },
{ "VOUT6", NULL, "Playback" },
{ "VOUT7", NULL, "Playback" },
{ "VOUT8", NULL, "Playback" },
};
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),
};
static 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 = 0x13,
.reg_defaults = pcm1681_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(pcm1681_reg_defaults),
.writeable_reg = pcm1681_writeable_reg,
.readable_reg = pcm1681_accessible_reg,
};
static const struct snd_soc_component_driver soc_component_dev_pcm1681 = {
.controls = pcm1681_controls,
.num_controls = ARRAY_SIZE(pcm1681_controls),
.dapm_widgets = pcm1681_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(pcm1681_dapm_widgets),
.dapm_routes = pcm1681_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(pcm1681_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
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 devm_snd_soc_register_component(&client->dev,
&soc_component_dev_pcm1681,
&pcm1681_dai, 1);
}
static struct i2c_driver pcm1681_i2c_driver = {
.driver = {
.name = "pcm1681",
.of_match_table = of_match_ptr(pcm1681_dt_ids),
},
.id_table = pcm1681_i2c_id,
.probe = pcm1681_i2c_probe,
};
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");
