sound/soc/codecs/wm8971.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/wm8971.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/wm8971.c
Extension
.c
Size
21134 bytes
Lines
713
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 wm8971_priv {
	unsigned int sysclk;
	struct delayed_work charge_work;
	struct regmap *regmap;
};

/*
 * wm8971 register cache
 * We can't read the WM8971 register space when we
 * are using 2 wire for device control, so we cache them instead.
 */
static const struct reg_default wm8971_reg_defaults[] = {
	{  0, 0x0097 },
	{  1, 0x0097 },
	{  2, 0x0079 },
	{  3, 0x0079 },
	{  4, 0x0000 },
	{  5, 0x0008 },
	{  6, 0x0000 },
	{  7, 0x000a },
	{  8, 0x0000 },
	{  9, 0x0000 },
	{ 10, 0x00ff },
	{ 11, 0x00ff },
	{ 12, 0x000f },
	{ 13, 0x000f },
	{ 14, 0x0000 },
	{ 15, 0x0000 },
	{ 16, 0x0000 },
	{ 17, 0x007b },
	{ 18, 0x0000 },
	{ 19, 0x0032 },
	{ 20, 0x0000 },
	{ 21, 0x00c3 },
	{ 22, 0x00c3 },
	{ 23, 0x00c0 },
	{ 24, 0x0000 },
	{ 25, 0x0000 },
	{ 26, 0x0000 },
	{ 27, 0x0000 },
	{ 28, 0x0000 },
	{ 29, 0x0000 },
	{ 30, 0x0000 },
	{ 31, 0x0000 },
	{ 32, 0x0000 },
	{ 33, 0x0000 },
	{ 34, 0x0050 },
	{ 35, 0x0050 },
	{ 36, 0x0050 },
	{ 37, 0x0050 },
	{ 38, 0x0050 },
	{ 39, 0x0050 },
	{ 40, 0x0079 },
	{ 41, 0x0079 },
	{ 42, 0x0079 },
};

#define wm8971_reset(c)	snd_soc_component_write(c, WM8971_RESET, 0)

/* WM8971 Controls */
static const char *wm8971_bass[] = { "Linear Control", "Adaptive Boost" };
static const char *wm8971_bass_filter[] = { "130Hz @ 48kHz",
	"200Hz @ 48kHz" };
static const char *wm8971_treble[] = { "8kHz", "4kHz" };
static const char *wm8971_alc_func[] = { "Off", "Right", "Left", "Stereo" };
static const char *wm8971_ng_type[] = { "Constant PGA Gain",
	"Mute ADC Output" };
static const char *wm8971_deemp[] = { "None", "32kHz", "44.1kHz", "48kHz" };
static const char *wm8971_mono_mux[] = {"Stereo", "Mono (Left)",
	"Mono (Right)", "Digital Mono"};
static const char *wm8971_dac_phase[] = { "Non Inverted", "Inverted" };
static const char *wm8971_lline_mux[] = {"Line", "NC", "NC", "PGA",
	"Differential"};
static const char *wm8971_rline_mux[] = {"Line", "Mic", "NC", "PGA",
	"Differential"};
static const char *wm8971_lpga_sel[] = {"Line", "NC", "NC", "Differential"};
static const char *wm8971_rpga_sel[] = {"Line", "Mic", "NC", "Differential"};
static const char *wm8971_adcpol[] = {"Normal", "L Invert", "R Invert",
	"L + R Invert"};

static const struct soc_enum wm8971_enum[] = {
	SOC_ENUM_SINGLE(WM8971_BASS, 7, 2, wm8971_bass),	/* 0 */
	SOC_ENUM_SINGLE(WM8971_BASS, 6, 2, wm8971_bass_filter),
	SOC_ENUM_SINGLE(WM8971_TREBLE, 6, 2, wm8971_treble),
	SOC_ENUM_SINGLE(WM8971_ALC1, 7, 4, wm8971_alc_func),
	SOC_ENUM_SINGLE(WM8971_NGATE, 1, 2, wm8971_ng_type),    /* 4 */
	SOC_ENUM_SINGLE(WM8971_ADCDAC, 1, 4, wm8971_deemp),
	SOC_ENUM_SINGLE(WM8971_ADCTL1, 4, 4, wm8971_mono_mux),
	SOC_ENUM_SINGLE(WM8971_ADCTL1, 1, 2, wm8971_dac_phase),
	SOC_ENUM_SINGLE(WM8971_LOUTM1, 0, 5, wm8971_lline_mux), /* 8 */

Annotation

Implementation Notes