sound/soc/codecs/wm8770.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/wm8770.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/wm8770.c
Extension
.c
Size
19503 bytes
Lines
702
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 wm8770_priv {
	struct regmap *regmap;
	struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
	struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
	struct snd_soc_component *component;
	int sysclk;
};

static int vout12supply_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event);
static int vout34supply_event(struct snd_soc_dapm_widget *w,
	struct snd_kcontrol *kcontrol, int event);

/*
 * We can't use the same notifier block for more than one supply and
 * there's no way I can see to get from a callback to the caller
 * except container_of().
 */
#define WM8770_REGULATOR_EVENT(n) \
static int wm8770_regulator_event_##n(struct notifier_block *nb, \
				      unsigned long event, void *data)    \
{ \
	struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
				     disable_nb[n]); \
	if (event & REGULATOR_EVENT_DISABLE) { \
		regcache_mark_dirty(wm8770->regmap);	\
	} \
	return 0; \
}

WM8770_REGULATOR_EVENT(0)
WM8770_REGULATOR_EVENT(1)
WM8770_REGULATOR_EVENT(2)

static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);

static const char *dac_phase_text[][2] = {
	{ "DAC1 Normal", "DAC1 Inverted" },
	{ "DAC2 Normal", "DAC2 Inverted" },
	{ "DAC3 Normal", "DAC3 Inverted" },
	{ "DAC4 Normal", "DAC4 Inverted" },
};

static const struct soc_enum dac_phase[] = {
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
	SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
};

static const struct snd_kcontrol_new wm8770_snd_controls[] = {
	/* global DAC playback controls */
	SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
		dac_dig_tlv),
	SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
	SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),

	/* global VOUT playback controls */
	SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
		dac_alg_tlv),
	SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),

	/* VOUT1/2/3/4 specific controls */
	SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
		WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
		WM8770_VOUT1RVOL, 7, 1, 0),
	SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
		WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
		WM8770_VOUT2RVOL, 7, 1, 0),
	SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
		WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
		WM8770_VOUT3RVOL, 7, 1, 0),
	SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
		WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
	SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
		WM8770_VOUT4RVOL, 7, 1, 0),

	/* DAC1/2/3/4 specific controls */
	SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
		WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
	SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
	SOC_ENUM("DAC1 Phase", dac_phase[0]),
	SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
		WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
	SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),

Annotation

Implementation Notes