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Add a codec driver for SI476X MFD
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This commit add a sound codec driver for Silicon Laboratories 476x
series of AM/FM radio chips.

Signed-off-by: Andrey Smirnov <andrey.smirnov@convergeddevices.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
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Andrey Smirnov authored and Mark Brown committed Oct 15, 2012
1 parent ddffeb8 commit 330345e
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Showing 3 changed files with 261 additions and 0 deletions.
4 changes: 4 additions & 0 deletions sound/soc/codecs/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_PCM3008
select SND_SOC_RT5631 if I2C
select SND_SOC_SGTL5000 if I2C
select SND_SOC_SI476X if MFD_SI476X_CORE
select SND_SOC_SN95031 if INTEL_SCU_IPC
select SND_SOC_SPDIF
select SND_SOC_SSM2602 if SND_SOC_I2C_AND_SPI
Expand Down Expand Up @@ -277,6 +278,9 @@ config SND_SOC_RT5631
config SND_SOC_SGTL5000
tristate

config SND_SOC_SI476X
tristate

config SND_SOC_SIGMADSP
tristate
select CRC32
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2 changes: 2 additions & 0 deletions sound/soc/codecs/Makefile
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Expand Up @@ -45,6 +45,7 @@ snd-soc-sgtl5000-objs := sgtl5000.o
snd-soc-alc5623-objs := alc5623.o
snd-soc-alc5632-objs := alc5632.o
snd-soc-sigmadsp-objs := sigmadsp.o
snd-soc-si476x-objs := si476x.o
snd-soc-sn95031-objs := sn95031.o
snd-soc-spdif-tx-objs := spdif_transciever.o
snd-soc-spdif-rx-objs := spdif_receiver.o
Expand Down Expand Up @@ -164,6 +165,7 @@ obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o
obj-$(CONFIG_SND_SOC_RT5631) += snd-soc-rt5631.o
obj-$(CONFIG_SND_SOC_SGTL5000) += snd-soc-sgtl5000.o
obj-$(CONFIG_SND_SOC_SIGMADSP) += snd-soc-sigmadsp.o
obj-$(CONFIG_SND_SOC_SI476X) += snd-soc-si476x.o
obj-$(CONFIG_SND_SOC_SN95031) +=snd-soc-sn95031.o
obj-$(CONFIG_SND_SOC_SPDIF) += snd-soc-spdif-rx.o snd-soc-spdif-tx.o
obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
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255 changes: 255 additions & 0 deletions sound/soc/codecs/si476x.c
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@@ -0,0 +1,255 @@
#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;
struct si476x_core *core = codec->control_data;

si476x_core_lock(core);
err = si476x_core_cmd_get_property(core, reg);
si476x_core_unlock(core);

return err;
}

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);
err = si476x_core_cmd_set_property(core, reg, val);
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;
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 __devinit si476x_platform_probe(struct platform_device *pdev)
{
return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x,
&si476x_dai, 1);
}

static int __devexit 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 = __devexit_p(si476x_platform_remove),
};
module_platform_driver(si476x_platform_driver);

MODULE_AUTHOR("Andrey Smirnov <andrey.smirnov@convergeddevices.net>");
MODULE_DESCRIPTION("ASoC Si4761/64 codec driver");
MODULE_LICENSE("GPL");

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