// SPDX-License-Identifier: GPL-2.0-only
//
// uda1334.c -- UDA1334 ALSA SoC Audio driver
//
// Based on WM8523 ALSA SoC Audio driver written by Mark Brown
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/gpio/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#define UDA1334_NUM_RATES 6
/* codec private data */
struct uda1334_priv {
struct gpio_desc *mute;
struct gpio_desc *deemph;
unsigned int sysclk;
unsigned int rate_constraint_list[UDA1334_NUM_RATES];
struct snd_pcm_hw_constraint_list rate_constraint;
};
static const struct snd_soc_dapm_widget uda1334_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
};
static const struct snd_soc_dapm_route uda1334_dapm_routes[] = {
{ "LINEVOUTL", NULL, "DAC" },
{ "LINEVOUTR", NULL, "DAC" },
};
static int uda1334_put_deemph(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
int deemph = ucontrol->value.integer.value[0];
if (deemph > 1)
return -EINVAL;
gpiod_set_value_cansleep(uda1334->deemph, deemph);
return 0;
};
static int uda1334_get_deemph(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
int ret;
ret = gpiod_get_value_cansleep(uda1334->deemph);
if (ret < 0)
return -EINVAL;
ucontrol->value.integer.value[0] = ret;
return 0;
};
static const struct snd_kcontrol_new uda1334_snd_controls[] = {
SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
uda1334_get_deemph, uda1334_put_deemph),
};
static const struct {
int value;
int ratio;
} lrclk_ratios[UDA1334_NUM_RATES] = {
{ 1, 128 },
{ 2, 192 },
{ 3, 256 },
{ 4, 384 },
{ 5, 512 },
{ 6, 768 },
};
static int uda1334_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
/*
* The set of sample rates that can be supported depends on the
* MCLK supplied to the CODEC - enforce this.
*/
if (!uda1334->sysclk) {
dev_err(component->dev,
"No MCLK configured, call set_sysclk() on init\n");
return -EINVAL;
}
snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&uda1334->rate_constraint);
gpiod_set_value_cansleep(uda1334->mute, 1);
return 0;
}
static void uda1334_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *component = dai->component;
struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
gpiod_set_value_cansleep(uda1334->mute, 0);
}
static int uda1334_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_component *component = codec_dai->component;
struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
unsigned int val;
int i, j = 0;
uda1334->sysclk = freq;
uda1334->rate_constraint.count = 0;
for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
val = freq / lrclk_ratios[i].ratio;
/*
* Check that it's a standard rate since core can't
* cope with others and having the odd rates confuses
* constraint matching.
*/
switch (val) {
case 8000:
case 32000:
case 44100:
case 48000:
case 64000:
case 88200:
case 96000:
dev_dbg(component->dev, "Supported sample rate: %dHz\n",
val);
uda1334->rate_constraint_list[j++] = val;
uda1334->rate_constraint.count++;
break;
default:
dev_dbg(component->dev, "Skipping sample rate: %dHz\n",
val);
}
}
/* Need at least one supported rate... */
if (uda1334->rate_constraint.count == 0)
return -EINVAL;
return 0;
}
static int uda1334_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
{
fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK);
if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBC_CFC)) {
dev_err(codec_dai->dev, "Invalid DAI format\n");
return -EINVAL;
}
return 0;
}
static int uda1334_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
{
struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(dai->component);
if (uda1334->mute)
gpiod_set_value_cansleep(uda1334->mute, mute);
return 0;
}
#define UDA1334_RATES SNDRV_PCM_RATE_8000_96000
#define UDA1334_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
static const struct snd_soc_dai_ops uda1334_dai_ops = {
.startup = uda1334_startup,
.shutdown = uda1334_shutdown,
.set_sysclk = uda1334_set_dai_sysclk,
.set_fmt = uda1334_set_fmt,
.mute_stream = uda1334_mute_stream,
};
static struct snd_soc_dai_driver uda1334_dai = {
.name = "uda1334-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = UDA1334_RATES,
.formats = UDA1334_FORMATS,
},
.ops = &uda1334_dai_ops,
};
static int uda1334_probe(struct snd_soc_component *component)
{
struct uda1334_priv *uda1334 = snd_soc_component_get_drvdata(component);
uda1334->rate_constraint.list = &uda1334->rate_constraint_list[0];
uda1334->rate_constraint.count =
ARRAY_SIZE(uda1334->rate_constraint_list);
return 0;
}
static const struct snd_soc_component_driver soc_component_dev_uda1334 = {
.probe = uda1334_probe,
.controls = uda1334_snd_controls,
.num_controls = ARRAY_SIZE(uda1334_snd_controls),
.dapm_widgets = uda1334_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(uda1334_dapm_widgets),
.dapm_routes = uda1334_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(uda1334_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static const struct of_device_id uda1334_of_match[] = {
{ .compatible = "nxp,uda1334" },
{ /* sentinel*/ }
};
MODULE_DEVICE_TABLE(of, uda1334_of_match);
static int uda1334_codec_probe(struct platform_device *pdev)
{
struct uda1334_priv *uda1334;
int ret;
uda1334 = devm_kzalloc(&pdev->dev, sizeof(struct uda1334_priv),
GFP_KERNEL);
if (!uda1334)
return -ENOMEM;
platform_set_drvdata(pdev, uda1334);
uda1334->mute = devm_gpiod_get(&pdev->dev, "nxp,mute", GPIOD_OUT_LOW);
if (IS_ERR(uda1334->mute)) {
ret = PTR_ERR(uda1334->mute);
dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret);
return ret;
}
uda1334->deemph = devm_gpiod_get(&pdev->dev, "nxp,deemph", GPIOD_OUT_LOW);
if (IS_ERR(uda1334->deemph)) {
ret = PTR_ERR(uda1334->deemph);
dev_err(&pdev->dev, "Failed to get deemph line: %d\n", ret);
return ret;
}
ret = devm_snd_soc_register_component(&pdev->dev,
&soc_component_dev_uda1334,
&uda1334_dai, 1);
if (ret < 0)
dev_err(&pdev->dev, "Failed to register component: %d\n", ret);
return ret;
}
static struct platform_driver uda1334_codec_driver = {
.probe = uda1334_codec_probe,
.driver = {
.name = "uda1334-codec",
.of_match_table = uda1334_of_match,
},
};
module_platform_driver(uda1334_codec_driver);
MODULE_DESCRIPTION("ASoC UDA1334 driver");
MODULE_AUTHOR("Andra Danciu <[email protected]>");
MODULE_ALIAS("platform:uda1334-codec");
MODULE_LICENSE("GPL v2");
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