sound/soc/codecs/tfa989x.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/tfa989x.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/tfa989x.c
Extension
.c
Size
12543 bytes
Lines
426
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct tfa989x_rev {
	unsigned int rev;
	int (*init)(struct regmap *regmap);
};

struct tfa989x {
	const struct tfa989x_rev *rev;
	struct regulator *vddd_supply;
	struct gpio_desc *rcv_gpiod;
};

static bool tfa989x_writeable_reg(struct device *dev, unsigned int reg)
{
	return reg > TFA989X_REVISIONNUMBER;
}

static bool tfa989x_volatile_reg(struct device *dev, unsigned int reg)
{
	return reg < TFA989X_REVISIONNUMBER;
}

static const struct regmap_config tfa989x_regmap = {
	.reg_bits = 8,
	.val_bits = 16,

	.writeable_reg	= tfa989x_writeable_reg,
	.volatile_reg	= tfa989x_volatile_reg,
	.cache_type	= REGCACHE_RBTREE,
};

static const char * const chsa_text[] = { "Left", "Right", /* "DSP" */ };
static SOC_ENUM_SINGLE_DECL(chsa_enum, TFA989X_I2SREG, TFA989X_I2SREG_CHSA, chsa_text);
static const struct snd_kcontrol_new chsa_mux = SOC_DAPM_ENUM("Amp Input", chsa_enum);

static const struct snd_soc_dapm_widget tfa989x_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("OUT"),
	SND_SOC_DAPM_SUPPLY("POWER", TFA989X_SYS_CTRL, TFA989X_SYS_CTRL_PWDN, 1, NULL, 0),
	SND_SOC_DAPM_OUT_DRV("AMPE", TFA989X_SYS_CTRL, TFA989X_SYS_CTRL_AMPE, 0, NULL, 0),

	SND_SOC_DAPM_MUX("Amp Input", SND_SOC_NOPM, 0, 0, &chsa_mux),
	SND_SOC_DAPM_AIF_IN("AIFINL", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_AIF_IN("AIFINR", "HiFi Playback", 1, SND_SOC_NOPM, 0, 0),
};

static const struct snd_soc_dapm_route tfa989x_dapm_routes[] = {
	{"OUT", NULL, "AMPE"},
	{"AMPE", NULL, "POWER"},
	{"AMPE", NULL, "Amp Input"},
	{"Amp Input", "Left", "AIFINL"},
	{"Amp Input", "Right", "AIFINR"},
};

static int tfa989x_put_mode(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
	struct tfa989x *tfa989x = snd_soc_component_get_drvdata(component);

	gpiod_set_value_cansleep(tfa989x->rcv_gpiod, ucontrol->value.enumerated.item[0]);

	return snd_soc_put_enum_double(kcontrol, ucontrol);
}

static const char * const mode_text[] = { "Speaker", "Receiver" };
static SOC_ENUM_SINGLE_DECL(mode_enum, TFA989X_I2SREG, TFA989X_I2SREG_RCV, mode_text);
static const struct snd_kcontrol_new tfa989x_mode_controls[] = {
	SOC_ENUM_EXT("Mode", mode_enum, snd_soc_get_enum_double, tfa989x_put_mode),
};

static int tfa989x_probe(struct snd_soc_component *component)
{
	struct tfa989x *tfa989x = snd_soc_component_get_drvdata(component);

	if (tfa989x->rev->rev == TFA9897_REVISION)
		return snd_soc_add_component_controls(component, tfa989x_mode_controls,
						      ARRAY_SIZE(tfa989x_mode_controls));

	return 0;
}

static const struct snd_soc_component_driver tfa989x_component = {
	.probe			= tfa989x_probe,
	.dapm_widgets		= tfa989x_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(tfa989x_dapm_widgets),
	.dapm_routes		= tfa989x_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(tfa989x_dapm_routes),
	.use_pmdown_time	= 1,
	.endianness		= 1,
};

static const unsigned int tfa989x_rates[] = {

Annotation

Implementation Notes