312 lines
7.3 KiB
C
312 lines
7.3 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
|
|
//
|
|
// Copyright (c) 2018 BayLibre, SAS.
|
|
// Author: Jerome Brunet <jbrunet@baylibre.com>
|
|
|
|
#include <linux/gpio/consumer.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/module.h>
|
|
#include <sound/soc.h>
|
|
|
|
struct es7241_clock_mode {
|
|
unsigned int rate_min;
|
|
unsigned int rate_max;
|
|
unsigned int *slv_mfs;
|
|
unsigned int slv_mfs_num;
|
|
unsigned int mst_mfs;
|
|
unsigned int mst_m0:1;
|
|
unsigned int mst_m1:1;
|
|
};
|
|
|
|
struct es7241_chip {
|
|
const struct es7241_clock_mode *modes;
|
|
unsigned int mode_num;
|
|
};
|
|
|
|
struct es7241_data {
|
|
struct gpio_desc *reset;
|
|
struct gpio_desc *m0;
|
|
struct gpio_desc *m1;
|
|
unsigned int fmt;
|
|
unsigned int mclk;
|
|
bool is_consumer;
|
|
const struct es7241_chip *chip;
|
|
};
|
|
|
|
static void es7241_set_mode(struct es7241_data *priv, int m0, int m1)
|
|
{
|
|
/* put the device in reset */
|
|
gpiod_set_value_cansleep(priv->reset, 0);
|
|
|
|
/* set the mode */
|
|
gpiod_set_value_cansleep(priv->m0, m0);
|
|
gpiod_set_value_cansleep(priv->m1, m1);
|
|
|
|
/* take the device out of reset - datasheet does not specify a delay */
|
|
gpiod_set_value_cansleep(priv->reset, 1);
|
|
}
|
|
|
|
static int es7241_set_consumer_mode(struct es7241_data *priv,
|
|
const struct es7241_clock_mode *mode,
|
|
unsigned int mfs)
|
|
{
|
|
int j;
|
|
|
|
if (!mfs)
|
|
goto out_ok;
|
|
|
|
for (j = 0; j < mode->slv_mfs_num; j++) {
|
|
if (mode->slv_mfs[j] == mfs)
|
|
goto out_ok;
|
|
}
|
|
|
|
return -EINVAL;
|
|
|
|
out_ok:
|
|
es7241_set_mode(priv, 1, 1);
|
|
return 0;
|
|
}
|
|
|
|
static int es7241_set_provider_mode(struct es7241_data *priv,
|
|
const struct es7241_clock_mode *mode,
|
|
unsigned int mfs)
|
|
{
|
|
/*
|
|
* We can't really set clock ratio, if the mclk/lrclk is different
|
|
* from what we provide, then error out
|
|
*/
|
|
if (mfs && mfs != mode->mst_mfs)
|
|
return -EINVAL;
|
|
|
|
es7241_set_mode(priv, mode->mst_m0, mode->mst_m1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int es7241_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct es7241_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
unsigned int rate = params_rate(params);
|
|
unsigned int mfs = priv->mclk / rate;
|
|
int i;
|
|
|
|
for (i = 0; i < priv->chip->mode_num; i++) {
|
|
const struct es7241_clock_mode *mode = &priv->chip->modes[i];
|
|
|
|
if (rate < mode->rate_min || rate >= mode->rate_max)
|
|
continue;
|
|
|
|
if (priv->is_consumer)
|
|
return es7241_set_consumer_mode(priv, mode, mfs);
|
|
else
|
|
return es7241_set_provider_mode(priv, mode, mfs);
|
|
}
|
|
|
|
/* should not happen */
|
|
dev_err(dai->dev, "unsupported rate: %u\n", rate);
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int es7241_set_sysclk(struct snd_soc_dai *dai, int clk_id,
|
|
unsigned int freq, int dir)
|
|
{
|
|
struct es7241_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
|
|
if (dir == SND_SOC_CLOCK_IN && clk_id == 0) {
|
|
priv->mclk = freq;
|
|
return 0;
|
|
}
|
|
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static int es7241_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
|
|
{
|
|
struct es7241_data *priv = snd_soc_dai_get_drvdata(dai);
|
|
|
|
if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
|
|
dev_err(dai->dev, "Unsupported dai clock inversion\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != priv->fmt) {
|
|
dev_err(dai->dev, "Invalid dai format\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
|
|
case SND_SOC_DAIFMT_CBC_CFC:
|
|
priv->is_consumer = true;
|
|
break;
|
|
case SND_SOC_DAIFMT_CBP_CFP:
|
|
priv->is_consumer = false;
|
|
break;
|
|
|
|
default:
|
|
dev_err(dai->dev, "Unsupported clock configuration\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops es7241_dai_ops = {
|
|
.set_fmt = es7241_set_fmt,
|
|
.hw_params = es7241_hw_params,
|
|
.set_sysclk = es7241_set_sysclk,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver es7241_dai = {
|
|
.name = "es7241-hifi",
|
|
.capture = {
|
|
.stream_name = "Capture",
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = SNDRV_PCM_RATE_8000_192000,
|
|
.formats = (SNDRV_PCM_FMTBIT_S16_LE |
|
|
SNDRV_PCM_FMTBIT_S24_3LE |
|
|
SNDRV_PCM_FMTBIT_S24_LE),
|
|
},
|
|
.ops = &es7241_dai_ops,
|
|
};
|
|
|
|
static const struct es7241_clock_mode es7241_modes[] = {
|
|
{
|
|
/* Single speed mode */
|
|
.rate_min = 8000,
|
|
.rate_max = 50000,
|
|
.slv_mfs = (unsigned int[]) { 256, 384, 512, 768, 1024 },
|
|
.slv_mfs_num = 5,
|
|
.mst_mfs = 256,
|
|
.mst_m0 = 0,
|
|
.mst_m1 = 0,
|
|
}, {
|
|
/* Double speed mode */
|
|
.rate_min = 50000,
|
|
.rate_max = 100000,
|
|
.slv_mfs = (unsigned int[]) { 128, 192 },
|
|
.slv_mfs_num = 2,
|
|
.mst_mfs = 128,
|
|
.mst_m0 = 1,
|
|
.mst_m1 = 0,
|
|
}, {
|
|
/* Quad speed mode */
|
|
.rate_min = 100000,
|
|
.rate_max = 200000,
|
|
.slv_mfs = (unsigned int[]) { 64 },
|
|
.slv_mfs_num = 1,
|
|
.mst_mfs = 64,
|
|
.mst_m0 = 0,
|
|
.mst_m1 = 1,
|
|
},
|
|
};
|
|
|
|
static const struct es7241_chip es7241_chip __maybe_unused = {
|
|
.modes = es7241_modes,
|
|
.mode_num = ARRAY_SIZE(es7241_modes),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_widget es7241_dapm_widgets[] = {
|
|
SND_SOC_DAPM_INPUT("AINL"),
|
|
SND_SOC_DAPM_INPUT("AINR"),
|
|
SND_SOC_DAPM_DAC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
|
|
SND_SOC_DAPM_REGULATOR_SUPPLY("VDDP", 0, 0),
|
|
SND_SOC_DAPM_REGULATOR_SUPPLY("VDDD", 0, 0),
|
|
SND_SOC_DAPM_REGULATOR_SUPPLY("VDDA", 0, 0),
|
|
};
|
|
|
|
static const struct snd_soc_dapm_route es7241_dapm_routes[] = {
|
|
{ "ADC", NULL, "AINL", },
|
|
{ "ADC", NULL, "AINR", },
|
|
{ "ADC", NULL, "VDDA", },
|
|
{ "Capture", NULL, "VDDP", },
|
|
{ "Capture", NULL, "VDDD", },
|
|
};
|
|
|
|
static const struct snd_soc_component_driver es7241_component_driver = {
|
|
.dapm_widgets = es7241_dapm_widgets,
|
|
.num_dapm_widgets = ARRAY_SIZE(es7241_dapm_widgets),
|
|
.dapm_routes = es7241_dapm_routes,
|
|
.num_dapm_routes = ARRAY_SIZE(es7241_dapm_routes),
|
|
.idle_bias_on = 1,
|
|
.endianness = 1,
|
|
};
|
|
|
|
static void es7241_parse_fmt(struct device *dev, struct es7241_data *priv)
|
|
{
|
|
bool is_leftj;
|
|
|
|
/*
|
|
* The format is given by a pull resistor on the SDOUT pin:
|
|
* pull-up for i2s, pull-down for left justified.
|
|
*/
|
|
is_leftj = of_property_read_bool(dev->of_node,
|
|
"everest,sdout-pull-down");
|
|
if (is_leftj)
|
|
priv->fmt = SND_SOC_DAIFMT_LEFT_J;
|
|
else
|
|
priv->fmt = SND_SOC_DAIFMT_I2S;
|
|
}
|
|
|
|
static int es7241_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct es7241_data *priv;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
platform_set_drvdata(pdev, priv);
|
|
|
|
priv->chip = of_device_get_match_data(dev);
|
|
if (!priv->chip) {
|
|
dev_err(dev, "failed to match device\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
es7241_parse_fmt(dev, priv);
|
|
|
|
priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
|
|
if (IS_ERR(priv->reset))
|
|
return dev_err_probe(dev, PTR_ERR(priv->reset),
|
|
"Failed to get 'reset' gpio");
|
|
|
|
priv->m0 = devm_gpiod_get_optional(dev, "m0", GPIOD_OUT_LOW);
|
|
if (IS_ERR(priv->m0))
|
|
return dev_err_probe(dev, PTR_ERR(priv->m0),
|
|
"Failed to get 'm0' gpio");
|
|
|
|
priv->m1 = devm_gpiod_get_optional(dev, "m1", GPIOD_OUT_LOW);
|
|
if (IS_ERR(priv->m1))
|
|
return dev_err_probe(dev, PTR_ERR(priv->m1),
|
|
"Failed to get 'm1' gpio");
|
|
|
|
return devm_snd_soc_register_component(&pdev->dev,
|
|
&es7241_component_driver,
|
|
&es7241_dai, 1);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id es7241_ids[] = {
|
|
{ .compatible = "everest,es7241", .data = &es7241_chip },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, es7241_ids);
|
|
#endif
|
|
|
|
static struct platform_driver es7241_driver = {
|
|
.driver = {
|
|
.name = "es7241",
|
|
.of_match_table = of_match_ptr(es7241_ids),
|
|
},
|
|
.probe = es7241_probe,
|
|
};
|
|
|
|
module_platform_driver(es7241_driver);
|
|
|
|
MODULE_DESCRIPTION("ASoC ES7241 audio codec driver");
|
|
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
|
|
MODULE_LICENSE("GPL");
|