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ASoC: codecs: aw87390: Add Anbernic RG-DS amp driver

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Add support for Anbernic's RG-DS audio amplifiers, powered by
Awinic AW87391 amplifier ICs. These chips typically require an
init sequence provided by firmware, but the manufacturer did not
provide firmware in this case. As a result we had to hard-code
the init sequence and use a device specific binding (rather than
a binding just for the aw87391).

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://patch.msgid.link/20260128174608.1498-3-macroalpha82@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Chris Morgan
2026-01-28 11:46:07 -06:00
committed by Mark Brown
parent c26d6cdade
commit a145cfd0ff
2 changed files with 253 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

175
sound/soc/codecs/aw87390.c
View File

@@ -314,6 +314,45 @@ static int aw87390_drv_event(struct snd_soc_dapm_widget *w,
return ret;
}
static int aw87391_rgds_drv_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
struct aw87390 *aw87390 = snd_soc_component_get_drvdata(component);
struct aw_device *aw_dev = aw87390->aw_pa;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
if (!IS_ERR(aw87390->vdd_reg)) {
if (regulator_enable(aw87390->vdd_reg))
dev_warn(aw_dev->dev, "Failed to enable vdd\n");
}
break;
case SND_SOC_DAPM_POST_PMU:
regmap_write(aw_dev->regmap, AW87391_SYSCTRL_REG,
AW87391_REG_VER_SEL_LOW | AW87391_REG_EN_ADAP |
AW87391_REG_EN_2X | AW87391_EN_SPK |
AW87391_EN_PA | AW87391_REG_EN_CP |
AW87391_EN_SW);
break;
case SND_SOC_DAPM_PRE_PMD:
regmap_write(aw_dev->regmap, AW87390_SYSCTRL_REG,
AW87390_POWER_DOWN_VALUE);
break;
case SND_SOC_DAPM_POST_PMD:
if (!IS_ERR(aw87390->vdd_reg)) {
if (regulator_disable(aw87390->vdd_reg))
dev_warn(aw_dev->dev, "Failed to disable vdd\n");
}
break;
default:
dev_err(aw_dev->dev, "%s: invalid event %d\n", __func__, event);
return -EINVAL;
}
return 0;
}
static const struct snd_soc_dapm_widget aw87390_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("IN"),
SND_SOC_DAPM_PGA_E("SPK PA", SND_SOC_NOPM, 0, 0, NULL, 0, aw87390_drv_event,
@@ -321,6 +360,14 @@ static const struct snd_soc_dapm_widget aw87390_dapm_widgets[] = {
SND_SOC_DAPM_OUTPUT("OUT"),
};
static const struct snd_soc_dapm_widget aw87391_rgds_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("IN"),
SND_SOC_DAPM_PGA_E("SPK PA", SND_SOC_NOPM, 0, 0, NULL, 0, aw87391_rgds_drv_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_OUTPUT("OUT"),
};
static const struct snd_soc_dapm_route aw87390_dapm_routes[] = {
{ "SPK PA", NULL, "IN" },
{ "OUT", NULL, "SPK PA" },
@@ -339,6 +386,80 @@ static int aw87390_codec_probe(struct snd_soc_component *component)
return 0;
}
/*
* Firmware typically is used to load the sequence of init commands,
* however for the Anbernic RG-DS we don't have a firmware file just
* a list of registers and values. Most of these values are undocumented
* in the AW87391 datasheet.
*/
static void aw87391_rgds_codec_init(struct aw87390 *aw87390)
{
struct aw_device *aw_dev = aw87390->aw_pa;
/* Undocumented command per datasheet. */
regmap_write(aw_dev->regmap, 0x64, 0x3a);
/* Bits 7:4 are undocumented but provided by manufacturer. */
regmap_write(aw_dev->regmap, AW87391_CP_REG,
(5 << 4) | AW87391_REG_CP_OVP_8_50V);
regmap_write(aw_dev->regmap, AW87391_AGCPO_REG,
AW87391_AK1_S_016 | AW87391_AGC2PO_MW(500));
regmap_write(aw_dev->regmap, AW87391_AGC2PA_REG,
AW87391_RK_S_20_48 | AW87391_AK2_S_41 | AW87391_AK2F_S_41);
/* Undocumented commands per datasheet. */
regmap_write(aw_dev->regmap, 0x5d, 0x00);
regmap_write(aw_dev->regmap, 0x5e, 0xb4);
regmap_write(aw_dev->regmap, 0x5f, 0x30);
regmap_write(aw_dev->regmap, 0x60, 0x39);
regmap_write(aw_dev->regmap, 0x61, 0x10);
regmap_write(aw_dev->regmap, 0x62, 0x03);
regmap_write(aw_dev->regmap, 0x63, 0x7d);
regmap_write(aw_dev->regmap, 0x65, 0xa0);
regmap_write(aw_dev->regmap, 0x66, 0x21);
regmap_write(aw_dev->regmap, 0x67, 0x41);
regmap_write(aw_dev->regmap, 0x68, 0x3b);
regmap_write(aw_dev->regmap, 0x6e, 0x00);
regmap_write(aw_dev->regmap, 0x6f, 0x00);
regmap_write(aw_dev->regmap, 0x70, 0x00);
regmap_write(aw_dev->regmap, 0x71, 0x00);
regmap_write(aw_dev->regmap, 0x72, 0x34);
regmap_write(aw_dev->regmap, 0x73, 0x06);
regmap_write(aw_dev->regmap, 0x74, 0x10);
regmap_write(aw_dev->regmap, 0x75, 0x00);
regmap_write(aw_dev->regmap, 0x7a, 0x00);
regmap_write(aw_dev->regmap, 0x7b, 0x00);
regmap_write(aw_dev->regmap, 0x7c, 0x00);
regmap_write(aw_dev->regmap, 0x7d, 0x00);
regmap_write(aw_dev->regmap, AW87391_PAG_REG, AW87391_GAIN_12DB);
regmap_write(aw_dev->regmap, AW87391_SYSCTRL_REG,
AW87391_EN_PA | AW87391_REG_EN_CP | AW87391_EN_SW);
regmap_write(aw_dev->regmap, AW87391_SYSCTRL_REG,
AW87391_REG_VER_SEL_LOW | AW87391_REG_EN_ADAP |
AW87391_REG_EN_2X | AW87391_EN_SPK | AW87391_EN_PA |
AW87391_REG_EN_CP | AW87391_EN_SW);
regmap_write(aw_dev->regmap, AW87391_PAG_REG, AW87391_GAIN_15DB);
}
static int aw87391_rgds_codec_probe(struct snd_soc_component *component)
{
struct aw87390 *aw87390 = snd_soc_component_get_drvdata(component);
aw87390->vdd_reg = devm_regulator_get_optional(aw87390->aw_pa->dev,
"vdd");
if (IS_ERR(aw87390->vdd_reg) && PTR_ERR(aw87390->vdd_reg) != -ENODEV)
return dev_err_probe(aw87390->aw_pa->dev,
PTR_ERR(aw87390->vdd_reg),
"Could not get vdd regulator\n");
aw87391_rgds_codec_init(aw87390);
return 0;
}
static const struct snd_soc_component_driver soc_codec_dev_aw87390 = {
.probe = aw87390_codec_probe,
.dapm_widgets = aw87390_dapm_widgets,
@@ -349,6 +470,14 @@ static const struct snd_soc_component_driver soc_codec_dev_aw87390 = {
.num_controls = ARRAY_SIZE(aw87390_controls),
};
static const struct snd_soc_component_driver soc_codec_dev_anbernic_rgds = {
.probe = aw87391_rgds_codec_probe,
.dapm_widgets = aw87391_rgds_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(aw87391_rgds_dapm_widgets),
.dapm_routes = aw87390_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(aw87390_dapm_routes),
};
static void aw87390_parse_channel_dt(struct aw87390 *aw87390)
{
struct aw_device *aw_dev = aw87390->aw_pa;
@@ -366,6 +495,10 @@ static int aw87390_init(struct aw87390 *aw87390, struct i2c_client *i2c, struct
unsigned int chip_id;
int ret;
aw_dev = devm_kzalloc(&i2c->dev, sizeof(*aw_dev), GFP_KERNEL);
if (!aw_dev)
return -ENOMEM;
/* read chip id */
ret = regmap_read(regmap, AW87390_ID_REG, &chip_id);
if (ret) {
@@ -373,22 +506,24 @@ static int aw87390_init(struct aw87390 *aw87390, struct i2c_client *i2c, struct
return ret;
}
if (chip_id != AW87390_CHIP_ID) {
switch (chip_id) {
case AW87390_CHIP_ID:
aw_dev->chip_id = AW87390_CHIP_ID;
break;
case AW87391_CHIP_ID:
aw_dev->chip_id = AW87391_CHIP_ID;
break;
default:
dev_err(&i2c->dev, "unsupported device\n");
return -ENXIO;
}
dev_dbg(&i2c->dev, "chip id = 0x%x\n", chip_id);
aw_dev = devm_kzalloc(&i2c->dev, sizeof(*aw_dev), GFP_KERNEL);
if (!aw_dev)
return -ENOMEM;
aw87390->aw_pa = aw_dev;
aw_dev->i2c = i2c;
aw_dev->regmap = regmap;
aw_dev->dev = &i2c->dev;
aw_dev->chip_id = AW87390_CHIP_ID;
aw_dev->acf = NULL;
aw_dev->prof_info.prof_desc = NULL;
aw_dev->prof_info.count = 0;
@@ -406,6 +541,7 @@ static int aw87390_init(struct aw87390 *aw87390, struct i2c_client *i2c, struct
static int aw87390_i2c_probe(struct i2c_client *i2c)
{
struct aw87390 *aw87390;
const struct snd_soc_component_driver *priv;
int ret;
ret = i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C);
@@ -434,16 +570,38 @@ static int aw87390_i2c_probe(struct i2c_client *i2c)
if (ret)
return ret;
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_codec_dev_aw87390, NULL, 0);
switch (aw87390->aw_pa->chip_id) {
case AW87390_CHIP_ID:
ret = devm_snd_soc_register_component(&i2c->dev,
&soc_codec_dev_aw87390, NULL, 0);
break;
case AW87391_CHIP_ID:
priv = of_device_get_match_data(&i2c->dev);
if (!priv)
return dev_err_probe(&i2c->dev, -EINVAL,
"aw87391 not currently supported\n");
ret = devm_snd_soc_register_component(&i2c->dev, priv, NULL, 0);
break;
default:
return -ENXIO;
}
if (ret)
dev_err(&i2c->dev, "failed to register aw87390: %d\n", ret);
return ret;
}
static const struct of_device_id aw87390_of_match[] = {
{ .compatible = "awinic,aw87390" },
{ .compatible = "anbernic,rgds-amp", .data = &soc_codec_dev_anbernic_rgds },
{},
};
MODULE_DEVICE_TABLE(of, aw87390_of_match);
static const struct i2c_device_id aw87390_i2c_id[] = {
{ AW87390_I2C_NAME },
{ AW87391_I2C_NAME },
{ }
};
MODULE_DEVICE_TABLE(i2c, aw87390_i2c_id);
@@ -451,6 +609,7 @@ MODULE_DEVICE_TABLE(i2c, aw87390_i2c_id);
static struct i2c_driver aw87390_i2c_driver = {
.driver = {
.name = AW87390_I2C_NAME,
.of_match_table = of_match_ptr(aw87390_of_match),
},
.probe = aw87390_i2c_probe,
.id_table = aw87390_i2c_id,

86
sound/soc/codecs/aw87390.h
View File

@@ -52,6 +52,90 @@
#define AW87390_I2C_NAME "aw87390"
#define AW87390_ACF_FILE "aw87390_acf.bin"
#define AW87391_SYSCTRL_REG (0x01)
#define AW87391_REG_VER_SEL_LOW (0 << 6)
#define AW87391_REG_VER_SEL_NORMAL (1 << 6)
#define AW87391_REG_VER_SEL_SUPER (2 << 6)
#define AW87391_REG_EN_ADAP BIT(5)
#define AW87391_REG_EN_2X BIT(4)
#define AW87391_EN_SPK BIT(3)
#define AW87391_EN_PA BIT(2)
#define AW87391_REG_EN_CP BIT(1)
#define AW87391_EN_SW BIT(0)
#define AW87391_CP_REG (0x02)
#define AW87391_REG_CP_OVP_6_50V 0
#define AW87391_REG_CP_OVP_6_75V 1
#define AW87391_REG_CP_OVP_7_00V 2
#define AW87391_REG_CP_OVP_7_25V 3
#define AW87391_REG_CP_OVP_7_50V 4
#define AW87391_REG_CP_OVP_7_75V 5
#define AW87391_REG_CP_OVP_8_00V 6
#define AW87391_REG_CP_OVP_8_25V 7
#define AW87391_REG_CP_OVP_8_50V 8
#define AW87391_PAG_REG (0x03)
#define AW87391_GAIN_12DB 0
#define AW87391_GAIN_15DB 1
#define AW87391_GAIN_18DB 2
#define AW87391_GAIN_21DB 3
#define AW87391_GAIN_24DB 4
#define AW87391_AGCPO_REG (0x04)
#define AW87391_AK1_S_016 (2 << 5)
#define AW87391_AK1_S_032 (3 << 5)
#define AW87391_PD_AGC1_PWRDN BIT(4)
/* AGC2PO supports values between 500mW (0000) to 1600mW (1011) */
#define AW87391_AGC2PO_MW(n) ((n / 100) - 5)
#define AW87391_AGC2PA_REG (0x05)
#define AW87391_RK_S_5_12 (0 << 5)
#define AW87391_RK_S_10_24 (1 << 5)
#define AW87391_RK_S_20_48 (2 << 5)
#define AW87391_RK_S_41 (3 << 5)
#define AW87391_RK_S_82 (4 << 5)
#define AW87391_RK_S_164 (5 << 5)
#define AW87391_RK_S_328 (6 << 5)
#define AW87391_RK_S_656 (7 << 5)
#define AW87391_AK2_S_1_28 (0 << 2)
#define AW87391_AK2_S_2_56 (1 << 2)
#define AW87391_AK2_S_10_24 (2 << 2)
#define AW87391_AK2_S_41 (3 << 2)
#define AW87391_AK2_S_82 (4 << 2)
#define AW87391_AK2_S_164 (5 << 2)
#define AW87391_AK2_S_328 (6 << 2)
#define AW87391_AK2_S_656 (7 << 2)
#define AW87391_AK2F_S_10_24 0
#define AW87391_AK2F_S_20_48 1
#define AW87391_AK2F_S_41 2
#define AW87391_AK2F_S_82 3
#define AW87391_SYSST_REG (0x06)
#define AW87391_UVLO BIT(7)
#define AW87391_OTN BIT(6)
#define AW87391_OC_FLAG BIT(5)
#define AW87391_ADAP_CP BIT(4)
#define AW87391_STARTOK BIT(3)
#define AW87391_CP_OVP BIT(2)
#define AW87391_PORN BIT(1)
#define AW87391_SYSINT_REG (0x07)
#define AW87391_UVLOI BIT(7)
#define AW87391_ONTI BIT(6)
#define AW87391_OC_FLAGI BIT(5)
#define AW87391_ADAP_CPI BIT(4)
#define AW87391_STARTOKI BIT(3)
#define AW87391_CP_OVPI BIT(2)
#define AW87391_PORNI BIT(1)
#define AW87391_DFT_THGEN0_REG (0x63)
#define AW87391_ADAPVTH_01W (0 << 2)
#define AW87391_ADAPVTH_02W (1 << 2)
#define AW87391_ADAPVTH_03W (2 << 2)
#define AW87391_ADAPVTH_04W (3 << 2)
#define AW87391_I2C_NAME "aw87391"
#define AW87390_PROFILE_EXT(xname, profile_info, profile_get, profile_set) \
{ \
.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
@@ -63,6 +147,7 @@
enum aw87390_id {
AW87390_CHIP_ID = 0x76,
AW87391_CHIP_ID = 0xc1,
};
enum {
@@ -80,6 +165,7 @@ struct aw87390 {
struct mutex lock;
struct regmap *regmap;
struct aw_container *aw_cfg;
struct regulator *vdd_reg;
};
#endif