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ASoC: ak4118: Add support for AK4118 S/PDIF transceiver 

The AK4118A is a digital audio transceiver supporting 8 input channels
at 192kHz and with 24bits resolution.
It converts the S/PDIF signal to I2S format and is configurable over I2C.

This driver introduce a minimal support of the AK4118, like selecting the
input channel, reading input frequency and detecting some errors.

Datasheet is available here:
https://www.akm.com/akm/en/file/datasheet/AK4118AEQ.pdf

Signed-off-by: Adrien Charruel <adrien.charruel@devialet.com>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Adrien Charruel 2018-11-14 13:16:41 +01:00 committed by Mark Brown
parent 8076de2244
commit bf897b441b
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 446 additions and 0 deletions
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6
sound/soc/codecs/Kconfig
View File

@ -35,6 +35,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_ADAU7002
select SND_SOC_ADS117X
select SND_SOC_AK4104 if SPI_MASTER
select SND_SOC_AK4118 if I2C
select SND_SOC_AK4458 if I2C
select SND_SOC_AK4535 if I2C
select SND_SOC_AK4554
@ -392,6 +393,11 @@ config SND_SOC_AK4104
tristate "AKM AK4104 CODEC"
depends on SPI_MASTER
config SND_SOC_AK4118
tristate "AKM AK4118 CODEC"
depends on I2C
select REGMAP_I2C
config SND_SOC_AK4458
tristate "AKM AK4458 CODEC"
depends on I2C

2
sound/soc/codecs/Makefile
View File

@ -27,6 +27,7 @@ snd-soc-adav801-objs := adav801.o
snd-soc-adav803-objs := adav803.o
snd-soc-ads117x-objs := ads117x.o
snd-soc-ak4104-objs := ak4104.o
snd-soc-ak4118-objs := ak4118.o
snd-soc-ak4458-objs := ak4458.o
snd-soc-ak4535-objs := ak4535.o
snd-soc-ak4554-objs := ak4554.o
@ -290,6 +291,7 @@ obj-$(CONFIG_SND_SOC_ADAV801) += snd-soc-adav801.o
obj-$(CONFIG_SND_SOC_ADAV803) += snd-soc-adav803.o
obj-$(CONFIG_SND_SOC_ADS117X) += snd-soc-ads117x.o
obj-$(CONFIG_SND_SOC_AK4104) += snd-soc-ak4104.o
obj-$(CONFIG_SND_SOC_AK4118) += snd-soc-ak4118.o
obj-$(CONFIG_SND_SOC_AK4458) += snd-soc-ak4458.o
obj-$(CONFIG_SND_SOC_AK4535) += snd-soc-ak4535.o
obj-$(CONFIG_SND_SOC_AK4554) += snd-soc-ak4554.o

438
sound/soc/codecs/ak4118.c Normal file
View File

@ -0,0 +1,438 @@
// SPDX-License-Identifier: GPL-2.0
/*
* ak4118.c -- Asahi Kasei ALSA Soc Audio driver
*
* Copyright 2018 DEVIALET
*/
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/asoundef.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/soc.h>
#define AK4118_REG_CLK_PWR_CTL 0x00
#define AK4118_REG_FORMAT_CTL 0x01
#define AK4118_REG_IO_CTL0 0x02
#define AK4118_REG_IO_CTL1 0x03
#define AK4118_REG_INT0_MASK 0x04
#define AK4118_REG_INT1_MASK 0x05
#define AK4118_REG_RCV_STATUS0 0x06
#define AK4118_REG_RCV_STATUS1 0x07
#define AK4118_REG_RXCHAN_STATUS0 0x08
#define AK4118_REG_RXCHAN_STATUS1 0x09
#define AK4118_REG_RXCHAN_STATUS2 0x0a
#define AK4118_REG_RXCHAN_STATUS3 0x0b
#define AK4118_REG_RXCHAN_STATUS4 0x0c
#define AK4118_REG_TXCHAN_STATUS0 0x0d
#define AK4118_REG_TXCHAN_STATUS1 0x0e
#define AK4118_REG_TXCHAN_STATUS2 0x0f
#define AK4118_REG_TXCHAN_STATUS3 0x10
#define AK4118_REG_TXCHAN_STATUS4 0x11
#define AK4118_REG_BURST_PREAMB_PC0 0x12
#define AK4118_REG_BURST_PREAMB_PC1 0x13
#define AK4118_REG_BURST_PREAMB_PD0 0x14
#define AK4118_REG_BURST_PREAMB_PD1 0x15
#define AK4118_REG_QSUB_CTL 0x16
#define AK4118_REG_QSUB_TRACK 0x17
#define AK4118_REG_QSUB_INDEX 0x18
#define AK4118_REG_QSUB_MIN 0x19
#define AK4118_REG_QSUB_SEC 0x1a
#define AK4118_REG_QSUB_FRAME 0x1b
#define AK4118_REG_QSUB_ZERO 0x1c
#define AK4118_REG_QSUB_ABS_MIN 0x1d
#define AK4118_REG_QSUB_ABS_SEC 0x1e
#define AK4118_REG_QSUB_ABS_FRAME 0x1f
#define AK4118_REG_GPE 0x20
#define AK4118_REG_GPDR 0x21
#define AK4118_REG_GPSCR 0x22
#define AK4118_REG_GPLR 0x23
#define AK4118_REG_DAT_MASK_DTS 0x24
#define AK4118_REG_RX_DETECT 0x25
#define AK4118_REG_STC_DAT_DETECT 0x26
#define AK4118_REG_RXCHAN_STATUS5 0x27
#define AK4118_REG_TXCHAN_STATUS5 0x28
#define AK4118_REG_MAX 0x29
#define AK4118_REG_FORMAT_CTL_DIF0 (1 << 4)
#define AK4118_REG_FORMAT_CTL_DIF1 (1 << 5)
#define AK4118_REG_FORMAT_CTL_DIF2 (1 << 6)
struct ak4118_priv {
struct regmap *regmap;
struct gpio_desc *reset;
struct gpio_desc *irq;
struct snd_soc_component *component;
};
static const struct reg_default ak4118_reg_defaults[] = {
{AK4118_REG_CLK_PWR_CTL, 0x43},
{AK4118_REG_FORMAT_CTL, 0x6a},
{AK4118_REG_IO_CTL0, 0x88},
{AK4118_REG_IO_CTL1, 0x48},
{AK4118_REG_INT0_MASK, 0xee},
{AK4118_REG_INT1_MASK, 0xb5},
{AK4118_REG_RCV_STATUS0, 0x00},
{AK4118_REG_RCV_STATUS1, 0x10},
{AK4118_REG_TXCHAN_STATUS0, 0x00},
{AK4118_REG_TXCHAN_STATUS1, 0x00},
{AK4118_REG_TXCHAN_STATUS2, 0x00},
{AK4118_REG_TXCHAN_STATUS3, 0x00},
{AK4118_REG_TXCHAN_STATUS4, 0x00},
{AK4118_REG_GPE, 0x77},
{AK4118_REG_GPDR, 0x00},
{AK4118_REG_GPSCR, 0x00},
{AK4118_REG_GPLR, 0x00},
{AK4118_REG_DAT_MASK_DTS, 0x3f},
{AK4118_REG_RX_DETECT, 0x00},
{AK4118_REG_STC_DAT_DETECT, 0x00},
{AK4118_REG_TXCHAN_STATUS5, 0x00},
};
static const char * const ak4118_input_select_txt[] = {
"RX0", "RX1", "RX2", "RX3", "RX4", "RX5", "RX6", "RX7",
};
static SOC_ENUM_SINGLE_DECL(ak4118_insel_enum, AK4118_REG_IO_CTL1, 0x0,
ak4118_input_select_txt);
static const struct snd_kcontrol_new ak4118_input_mux_controls =
SOC_DAPM_ENUM("Input Select", ak4118_insel_enum);
static const char * const ak4118_iec958_fs_txt[] = {
"44100", "48000", "32000", "22050", "11025", "24000", "16000", "88200",
"8000", "96000", "64000", "176400", "192000",
};
static const int ak4118_iec958_fs_val[] = {
0x0, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0xE,
};
static SOC_VALUE_ENUM_SINGLE_DECL(ak4118_iec958_fs_enum, AK4118_REG_RCV_STATUS1,
0x4, 0x4, ak4118_iec958_fs_txt,
ak4118_iec958_fs_val);
static struct snd_kcontrol_new ak4118_iec958_controls[] = {
SOC_SINGLE("IEC958 Parity Errors", AK4118_REG_RCV_STATUS0, 0, 1, 0),
SOC_SINGLE("IEC958 No Audio", AK4118_REG_RCV_STATUS0, 1, 1, 0),
SOC_SINGLE("IEC958 PLL Lock", AK4118_REG_RCV_STATUS0, 4, 1, 1),
SOC_SINGLE("IEC958 Non PCM", AK4118_REG_RCV_STATUS0, 6, 1, 0),
SOC_ENUM("IEC958 Sampling Freq", ak4118_iec958_fs_enum),
};
static const struct snd_soc_dapm_widget ak4118_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("INRX0"),
SND_SOC_DAPM_INPUT("INRX1"),
SND_SOC_DAPM_INPUT("INRX2"),
SND_SOC_DAPM_INPUT("INRX3"),
SND_SOC_DAPM_INPUT("INRX4"),
SND_SOC_DAPM_INPUT("INRX5"),
SND_SOC_DAPM_INPUT("INRX6"),
SND_SOC_DAPM_INPUT("INRX7"),
SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
&ak4118_input_mux_controls),
};
static const struct snd_soc_dapm_route ak4118_dapm_routes[] = {
{"Input Mux", "RX0", "INRX0"},
{"Input Mux", "RX1", "INRX1"},
{"Input Mux", "RX2", "INRX2"},
{"Input Mux", "RX3", "INRX3"},
{"Input Mux", "RX4", "INRX4"},
{"Input Mux", "RX5", "INRX5"},
{"Input Mux", "RX6", "INRX6"},
{"Input Mux", "RX7", "INRX7"},
};
static int ak4118_set_dai_fmt_master(struct ak4118_priv *ak4118,
unsigned int format)
{
int dif;
switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF2;
break;
case SND_SOC_DAIFMT_RIGHT_J:
dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1;
break;
case SND_SOC_DAIFMT_LEFT_J:
dif = AK4118_REG_FORMAT_CTL_DIF2;
break;
default:
return -ENOTSUPP;
}
return dif;
}
static int ak4118_set_dai_fmt_slave(struct ak4118_priv *ak4118,
unsigned int format)
{
int dif;
switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
dif = AK4118_REG_FORMAT_CTL_DIF0 | AK4118_REG_FORMAT_CTL_DIF1 |
AK4118_REG_FORMAT_CTL_DIF2;
break;
case SND_SOC_DAIFMT_LEFT_J:
dif = AK4118_REG_FORMAT_CTL_DIF1 | AK4118_REG_FORMAT_CTL_DIF2;
break;
default:
return -ENOTSUPP;
}
return dif;
}
static int ak4118_set_dai_fmt(struct snd_soc_dai *dai,
unsigned int format)
{
struct snd_soc_component *component = dai->component;
struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
int dif;
int ret = 0;
switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
/* component is master */
dif = ak4118_set_dai_fmt_master(ak4118, format);
break;
case SND_SOC_DAIFMT_CBS_CFS:
/*component is slave */
dif = ak4118_set_dai_fmt_slave(ak4118, format);
break;
default:
ret = -ENOTSUPP;
goto exit;
}
/* format not supported */
if (dif < 0) {
ret = dif;
goto exit;
}
ret = regmap_update_bits(ak4118->regmap, AK4118_REG_FORMAT_CTL,
AK4118_REG_FORMAT_CTL_DIF0 |
AK4118_REG_FORMAT_CTL_DIF1 |
AK4118_REG_FORMAT_CTL_DIF2, dif);
if (ret < 0)
goto exit;
exit:
return ret;
}
static int ak4118_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
return 0;
}
static const struct snd_soc_dai_ops ak4118_dai_ops = {
.hw_params = ak4118_hw_params,
.set_fmt = ak4118_set_dai_fmt,
};
static struct snd_soc_dai_driver ak4118_dai = {
.name = "ak4118-hifi",
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_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_S24_3LE |
SNDRV_PCM_FMTBIT_S24_LE
},
.ops = &ak4118_dai_ops,
};
static irqreturn_t ak4118_irq_handler(int irq, void *data)
{
struct ak4118_priv *ak4118 = data;
struct snd_soc_component *component = ak4118->component;
struct snd_kcontrol_new *kctl_new;
struct snd_kcontrol *kctl;
struct snd_ctl_elem_id *id;
unsigned int i;
if (!component)
return IRQ_NONE;
for (i = 0; i < ARRAY_SIZE(ak4118_iec958_controls); i++) {
kctl_new = &ak4118_iec958_controls[i];
kctl = snd_soc_card_get_kcontrol(component->card,
kctl_new->name);
if (!kctl)
continue;
id = &kctl->id;
snd_ctl_notify(component->card->snd_card,
SNDRV_CTL_EVENT_MASK_VALUE, id);
}
return IRQ_HANDLED;
}
static int ak4118_probe(struct snd_soc_component *component)
{
struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
int ret = 0;
ak4118->component = component;
/* release reset */
gpiod_set_value(ak4118->reset, 0);
/* unmask all int1 sources */
ret = regmap_write(ak4118->regmap, AK4118_REG_INT1_MASK, 0x00);
if (ret < 0) {
dev_err(component->dev,
"failed to write regmap 0x%x 0x%x: %d\n",
AK4118_REG_INT1_MASK, 0x00, ret);
return ret;
}
/* rx detect enable on all channels */
ret = regmap_write(ak4118->regmap, AK4118_REG_RX_DETECT, 0xff);
if (ret < 0) {
dev_err(component->dev,
"failed to write regmap 0x%x 0x%x: %d\n",
AK4118_REG_RX_DETECT, 0xff, ret);
return ret;
}
ret = snd_soc_add_component_controls(component, ak4118_iec958_controls,
ARRAY_SIZE(ak4118_iec958_controls));
if (ret) {
dev_err(component->dev,
"failed to add component kcontrols: %d\n", ret);
return ret;
}
return 0;
}
static void ak4118_remove(struct snd_soc_component *component)
{
struct ak4118_priv *ak4118 = snd_soc_component_get_drvdata(component);
/* hold reset */
gpiod_set_value(ak4118->reset, 1);
}
static const struct snd_soc_component_driver soc_component_drv_ak4118 = {
.probe = ak4118_probe,
.remove = ak4118_remove,
.dapm_widgets = ak4118_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ak4118_dapm_widgets),
.dapm_routes = ak4118_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(ak4118_dapm_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
.non_legacy_dai_naming = 1,
};
static const struct regmap_config ak4118_regmap = {
.reg_bits = 8,
.val_bits = 8,
.reg_defaults = ak4118_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(ak4118_reg_defaults),
.cache_type = REGCACHE_NONE,
.max_register = AK4118_REG_MAX - 1,
};
static int ak4118_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct ak4118_priv *ak4118;
int ret;
ak4118 = devm_kzalloc(&i2c->dev, sizeof(struct ak4118_priv),
GFP_KERNEL);
if (ak4118 == NULL)
return -ENOMEM;
ak4118->regmap = devm_regmap_init_i2c(i2c, &ak4118_regmap);
if (IS_ERR(ak4118->regmap))
return PTR_ERR(ak4118->regmap);
i2c_set_clientdata(i2c, ak4118);
ak4118->reset = devm_gpiod_get(&i2c->dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ak4118->reset)) {
ret = PTR_ERR(ak4118->reset);
if (ret != -EPROBE_DEFER)
dev_err(&i2c->dev, "Failed to get reset: %d\n", ret);
return ret;
}
ak4118->irq = devm_gpiod_get(&i2c->dev, "irq", GPIOD_IN);
if (IS_ERR(ak4118->irq)) {
ret = PTR_ERR(ak4118->irq);
if (ret != -EPROBE_DEFER)
dev_err(&i2c->dev, "Failed to get IRQ: %d\n", ret);
return ret;
}
ret = devm_request_threaded_irq(&i2c->dev, gpiod_to_irq(ak4118->irq),
NULL, ak4118_irq_handler,
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
"ak4118-irq", ak4118);
if (ret < 0) {
dev_err(&i2c->dev, "Fail to request_irq: %d\n", ret);
return ret;
}
return snd_soc_register_component(&i2c->dev, &soc_component_drv_ak4118,
&ak4118_dai, 1);
}
static int ak4118_i2c_remove(struct i2c_client *i2c)
{
snd_soc_unregister_component(&i2c->dev);
return 0;
}
static const struct of_device_id ak4118_of_match[] = {
{ .compatible = "asahi-kasei,ak4118", },
{}
};
MODULE_DEVICE_TABLE(of, ak4118_of_match);
static const struct i2c_device_id ak4118_id_table[] = {
{ "ak4118", 0 },
{}
};
MODULE_DEVICE_TABLE(i2c, ak4118_id_table);
static struct i2c_driver ak4118_i2c_driver = {
.driver = {
.name = "ak4118",
.of_match_table = of_match_ptr(ak4118_of_match),
},
.id_table = ak4118_id_table,
.probe = ak4118_i2c_probe,
.remove = ak4118_i2c_remove,
};
module_i2c_driver(ak4118_i2c_driver);
MODULE_DESCRIPTION("Asahi Kasei AK4118 ALSA SoC driver");
MODULE_AUTHOR("Adrien Charruel <adrien.charruel@devialet.com>");
MODULE_LICENSE("GPL");