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/*
* sound/soc/codecs/si476x.c -- Codec driver for SI476X chips
*
* Copyright (C) 2012 Innovative Converged Devices(ICD)
* Copyright (C) 2013 Andrey Smirnov
*
* Author: Andrey Smirnov <andrew.smirnov@gmail.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; version 2 of the License.
*
* 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 <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <linux/i2c.h>
#include <linux/mfd/si476x-core.h>
enum si476x_audio_registers {
SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203,
SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202,
};
enum si476x_digital_io_output_format {
SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11,
SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8,
};
#define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0b111 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \
(0b111 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT))
#define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0b1111110)
enum si476x_daudio_formats {
SI476X_DAUDIO_MODE_I2S = (0x0 << 1),
SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1),
SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1),
SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1),
SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1),
SI476X_DAUDIO_MODE_IB = (1 << 5),
SI476X_DAUDIO_MODE_IF = (1 << 6),
};
enum si476x_pcm_format {
SI476X_PCM_FORMAT_S8 = 2,
SI476X_PCM_FORMAT_S16_LE = 4,
SI476X_PCM_FORMAT_S20_3LE = 5,
SI476X_PCM_FORMAT_S24_LE = 6,
};
static unsigned int si476x_codec_read(struct snd_soc_codec *codec,
unsigned int reg)
{
int err;
unsigned int val;
struct si476x_core *core = codec->control_data;
si476x_core_lock(core);
if (!si476x_core_is_powered_up(core))
regcache_cache_only(core->regmap, true);
err = regmap_read(core->regmap, reg, &val);
if (!si476x_core_is_powered_up(core))
regcache_cache_only(core->regmap, false);
si476x_core_unlock(core);
if (err < 0)
return err;
return val;
}
static int si476x_codec_write(struct snd_soc_codec *codec,
unsigned int reg, unsigned int val)
{
int err;
struct si476x_core *core = codec->control_data;
si476x_core_lock(core);
if (!si476x_core_is_powered_up(core))
regcache_cache_only(core->regmap, true);
err = regmap_write(core->regmap, reg, val);
if (!si476x_core_is_powered_up(core))
regcache_cache_only(core->regmap, false);
si476x_core_unlock(core);
return err;
}
static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
int err;
u16 format = 0;
if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
return -EINVAL;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_A:
format |= SI476X_DAUDIO_MODE_DSP_A;
break;
case SND_SOC_DAIFMT_DSP_B:
format |= SI476X_DAUDIO_MODE_DSP_B;
break;
case SND_SOC_DAIFMT_I2S:
format |= SI476X_DAUDIO_MODE_I2S;
break;
case SND_SOC_DAIFMT_RIGHT_J:
format |= SI476X_DAUDIO_MODE_RIGHT_J;
break;
case SND_SOC_DAIFMT_LEFT_J:
format |= SI476X_DAUDIO_MODE_LEFT_J;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_A:
case SND_SOC_DAIFMT_DSP_B:
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_NF:
format |= SI476X_DAUDIO_MODE_IB;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_RIGHT_J:
case SND_SOC_DAIFMT_LEFT_J:
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
format |= SI476X_DAUDIO_MODE_IB |
SI476X_DAUDIO_MODE_IF;
break;
case SND_SOC_DAIFMT_IB_NF:
format |= SI476X_DAUDIO_MODE_IB;
break;
case SND_SOC_DAIFMT_NB_IF:
format |= SI476X_DAUDIO_MODE_IF;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK,
format);
if (err < 0) {
dev_err(codec_dai->codec->dev, "Failed to set output format\n");
return err;
}
return 0;
}
static int si476x_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int rate, width, err;
rate = params_rate(params);
if (rate < 32000 || rate > 48000) {
dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate);
return -EINVAL;
}
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
width = SI476X_PCM_FORMAT_S8;
break;
case SNDRV_PCM_FORMAT_S16_LE:
width = SI476X_PCM_FORMAT_S16_LE;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
width = SI476X_PCM_FORMAT_S20_3LE;
break;
case SNDRV_PCM_FORMAT_S24_LE:
width = SI476X_PCM_FORMAT_S24_LE;
break;
default:
return -EINVAL;
}
err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE,
rate);
if (err < 0) {
dev_err(dai->codec->dev, "Failed to set sample rate\n");
return err;
}
err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT,
SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK,
(width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) |
(width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT));
if (err < 0) {
dev_err(dai->codec->dev, "Failed to set output width\n");
return err;
}
return 0;
}
static int si476x_codec_probe(struct snd_soc_codec *codec)
{
codec->control_data = i2c_mfd_cell_to_core(codec->dev);
return 0;
}
static struct snd_soc_dai_ops si476x_dai_ops = {
.hw_params = si476x_codec_hw_params,
.set_fmt = si476x_codec_set_dai_fmt,
};
static struct snd_soc_dai_driver si476x_dai = {
.name = "si476x-codec",
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S8 |
SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE
},
.ops = &si476x_dai_ops,
};
static struct snd_soc_codec_driver soc_codec_dev_si476x = {
.probe = si476x_codec_probe,
.read = si476x_codec_read,
.write = si476x_codec_write,
};
static int si476x_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x,
&si476x_dai, 1);
}
static int si476x_platform_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
MODULE_ALIAS("platform:si476x-codec");
static struct platform_driver si476x_platform_driver = {
.driver = {
.name = "si476x-codec",
.owner = THIS_MODULE,
},
.probe = si476x_platform_probe,
.remove = si476x_platform_remove,
};
module_platform_driver(si476x_platform_driver);
MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>");
MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
MODULE_LICENSE("GPL");
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