sound/soc/codecs/ad1836.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/ad1836.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/ad1836.c
Extension
.c
Size
10718 bytes
Lines
410
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 ad1836_priv {
	enum ad1836_type type;
	struct regmap *regmap;
};

/*
 * AD1836 volume/mute/de-emphasis etc. controls
 */
static const char *ad1836_deemp[] = {"None", "44.1kHz", "32kHz", "48kHz"};

static SOC_ENUM_SINGLE_DECL(ad1836_deemp_enum,
			    AD1836_DAC_CTRL1, 8, ad1836_deemp);

#define AD1836_DAC_VOLUME(x) \
	SOC_DOUBLE_R("DAC" #x " Playback Volume", AD1836_DAC_L_VOL(x), \
			AD1836_DAC_R_VOL(x), 0, 0x3FF, 0)

#define AD1836_DAC_SWITCH(x) \
	SOC_DOUBLE("DAC" #x " Playback Switch", AD1836_DAC_CTRL2, \
			AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)

#define AD1836_ADC_SWITCH(x) \
	SOC_DOUBLE("ADC" #x " Capture Switch", AD1836_ADC_CTRL2, \
		AD1836_MUTE_LEFT(x), AD1836_MUTE_RIGHT(x), 1, 1)

static const struct snd_kcontrol_new ad183x_dac_controls[] = {
	AD1836_DAC_VOLUME(1),
	AD1836_DAC_SWITCH(1),
	AD1836_DAC_VOLUME(2),
	AD1836_DAC_SWITCH(2),
	AD1836_DAC_VOLUME(3),
	AD1836_DAC_SWITCH(3),
	AD1836_DAC_VOLUME(4),
	AD1836_DAC_SWITCH(4),
};

static const struct snd_soc_dapm_widget ad183x_dac_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("DAC1OUT"),
	SND_SOC_DAPM_OUTPUT("DAC2OUT"),
	SND_SOC_DAPM_OUTPUT("DAC3OUT"),
	SND_SOC_DAPM_OUTPUT("DAC4OUT"),
};

static const struct snd_soc_dapm_route ad183x_dac_routes[] = {
	{ "DAC1OUT", NULL, "DAC" },
	{ "DAC2OUT", NULL, "DAC" },
	{ "DAC3OUT", NULL, "DAC" },
	{ "DAC4OUT", NULL, "DAC" },
};

static const struct snd_kcontrol_new ad183x_adc_controls[] = {
	AD1836_ADC_SWITCH(1),
	AD1836_ADC_SWITCH(2),
	AD1836_ADC_SWITCH(3),
};

static const struct snd_soc_dapm_widget ad183x_adc_dapm_widgets[] = {
	SND_SOC_DAPM_INPUT("ADC1IN"),
	SND_SOC_DAPM_INPUT("ADC2IN"),
};

static const struct snd_soc_dapm_route ad183x_adc_routes[] = {
	{ "ADC", NULL, "ADC1IN" },
	{ "ADC", NULL, "ADC2IN" },
};

static const struct snd_kcontrol_new ad183x_controls[] = {
	/* ADC high-pass filter */
	SOC_SINGLE("ADC High Pass Filter Switch", AD1836_ADC_CTRL1,
			AD1836_ADC_HIGHPASS_FILTER, 1, 0),

	/* DAC de-emphasis */
	SOC_ENUM("Playback Deemphasis", ad1836_deemp_enum),
};

static const struct snd_soc_dapm_widget ad183x_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC", "Playback", AD1836_DAC_CTRL1,
				AD1836_DAC_POWERDOWN, 1),
	SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_SUPPLY("ADC_PWR", AD1836_ADC_CTRL1,
				AD1836_ADC_POWERDOWN, 1, NULL, 0),
};

static const struct snd_soc_dapm_route ad183x_dapm_routes[] = {
	{ "DAC", NULL, "ADC_PWR" },
	{ "ADC", NULL, "ADC_PWR" },
};

static const DECLARE_TLV_DB_SCALE(ad1836_in_tlv, 0, 300, 0);

Annotation

Implementation Notes