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/*
* Copyright (c) 2017 BayLibre, SAS.
* Author: Jerome Brunet <jbrunet@baylibre.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
* The full GNU General Public License is included in this distribution
* in the file called COPYING.
*/
#include <linux/of_platform.h>
#include <linux/module.h>
#include <sound/soc.h>
/*
* The everest 7134 is a very simple DA converter with no register
*/
struct es7134_clock_mode {
unsigned int rate_min;
unsigned int rate_max;
unsigned int *mclk_fs;
unsigned int mclk_fs_num;
};
struct es7134_chip {
const struct es7134_clock_mode *modes;
unsigned int mode_num;
};
struct es7134_data {
unsigned int mclk;
const struct es7134_chip *chip;
};
static int es7134_check_mclk(struct snd_soc_dai *dai,
struct es7134_data *priv,
unsigned int rate)
{
unsigned int mfs = priv->mclk / rate;
int i, j;
for (i = 0; i < priv->chip->mode_num; i++) {
const struct es7134_clock_mode *mode = &priv->chip->modes[i];
if (rate < mode->rate_min || rate > mode->rate_max)
continue;
for (j = 0; j < mode->mclk_fs_num; j++) {
if (mode->mclk_fs[j] == mfs)
return 0;
}
dev_err(dai->dev, "unsupported mclk_fs %u for rate %u\n",
mfs, rate);
return -EINVAL;
}
/* should not happen */
dev_err(dai->dev, "unsupported rate: %u\n", rate);
return -EINVAL;
}
static int es7134_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct es7134_data *priv = snd_soc_dai_get_drvdata(dai);
/* mclk has not been provided, assume it is OK */
if (!priv->mclk)
return 0;
return es7134_check_mclk(dai, priv, params_rate(params));
}
static int es7134_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct es7134_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 es7134_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_MASTER_MASK);
if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS)) {
dev_err(codec_dai->dev, "Invalid DAI format\n");
return -EINVAL;
}
return 0;
}
static const struct snd_soc_dai_ops es7134_dai_ops = {
.set_fmt = es7134_set_fmt,
.hw_params = es7134_hw_params,
.set_sysclk = es7134_set_sysclk,
};
static struct snd_soc_dai_driver es7134_dai = {
.name = "es7134-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = (SNDRV_PCM_RATE_8000_48000 |
SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000 |
SNDRV_PCM_RATE_176400 |
SNDRV_PCM_RATE_192000),
.formats = (SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S18_3LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_3LE |
SNDRV_PCM_FMTBIT_S24_LE),
},
.ops = &es7134_dai_ops,
};
static const struct es7134_clock_mode es7134_modes[] = {
{
/* Single speed mode */
.rate_min = 8000,
.rate_max = 50000,
.mclk_fs = (unsigned int[]) { 256, 384, 512, 768, 1024 },
.mclk_fs_num = 5,
}, {
/* Double speed mode */
.rate_min = 84000,
.rate_max = 100000,
.mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512 },
.mclk_fs_num = 5,
}, {
/* Quad speed mode */
.rate_min = 167000,
.rate_max = 192000,
.mclk_fs = (unsigned int[]) { 128, 192, 256 },
.mclk_fs_num = 3,
},
};
static const struct es7134_chip es7134_chip = {
.modes = es7134_modes,
.mode_num = ARRAY_SIZE(es7134_modes),
};
static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("AOUTL"),
SND_SOC_DAPM_OUTPUT("AOUTR"),
SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_REGULATOR_SUPPLY("VDD", 0, 0),
SND_SOC_DAPM_REGULATOR_SUPPLY("AVDD", 0, 0),
};
static const struct snd_soc_dapm_route es7134_dapm_routes[] = {
{ "AOUTL", NULL, "DAC" },
{ "AOUTR", NULL, "DAC" },
{ "Playback", NULL, "VDD" },
{ "DAC", NULL, "AVDD" },
};
static const struct snd_soc_component_driver es7134_component_driver = {
.dapm_widgets = es7134_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(es7134_dapm_widgets),
.dapm_routes = es7134_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(es7134_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static int es7134_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct es7134_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;
}
return devm_snd_soc_register_component(&pdev->dev,
&es7134_component_driver,
&es7134_dai, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id es7134_ids[] = {
{ .compatible = "everest,es7134", .data = &es7134_chip },
{ .compatible = "everest,es7144", .data = &es7134_chip },
{ }
};
MODULE_DEVICE_TABLE(of, es7134_ids);
#endif
static struct platform_driver es7134_driver = {
.driver = {
.name = "es7134",
.of_match_table = of_match_ptr(es7134_ids),
},
.probe = es7134_probe,
};
module_platform_driver(es7134_driver);
MODULE_DESCRIPTION("ASoC ES7134 audio codec driver");
MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
MODULE_LICENSE("GPL");
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