sound/soc/codecs/ssm2518.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/ssm2518.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/ssm2518.c
Extension
.c
Size
22828 bytes
Lines
815
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 ssm2518 {
	struct regmap *regmap;
	bool right_j;

	unsigned int sysclk;
	const struct snd_pcm_hw_constraint_list *constraints;

	struct gpio_desc *enable_gpio;
};

static const struct reg_default ssm2518_reg_defaults[] = {
	{ 0x00, 0x05 },
	{ 0x01, 0x00 },
	{ 0x02, 0x02 },
	{ 0x03, 0x00 },
	{ 0x04, 0x10 },
	{ 0x05, 0x40 },
	{ 0x06, 0x40 },
	{ 0x07, 0x81 },
	{ 0x08, 0x0c },
	{ 0x09, 0x99 },
	{ 0x0a, 0x7c },
	{ 0x0b, 0x5b },
	{ 0x0c, 0x57 },
	{ 0x0d, 0x89 },
	{ 0x0e, 0x8c },
	{ 0x0f, 0x77 },
	{ 0x10, 0x26 },
	{ 0x11, 0x1c },
	{ 0x12, 0x97 },
};

static const DECLARE_TLV_DB_MINMAX_MUTE(ssm2518_vol_tlv, -7125, 2400);
static const DECLARE_TLV_DB_SCALE(ssm2518_compressor_tlv, -3400, 200, 0);
static const DECLARE_TLV_DB_SCALE(ssm2518_expander_tlv, -8100, 300, 0);
static const DECLARE_TLV_DB_SCALE(ssm2518_noise_gate_tlv, -9600, 300, 0);
static const DECLARE_TLV_DB_SCALE(ssm2518_post_drc_tlv, -2400, 300, 0);

static const DECLARE_TLV_DB_RANGE(ssm2518_limiter_tlv,
	0, 7, TLV_DB_SCALE_ITEM(-2200, 200, 0),
	7, 15, TLV_DB_SCALE_ITEM(-800, 100, 0),
);

static const char * const ssm2518_drc_peak_detector_attack_time_text[] = {
	"0 ms", "0.1 ms", "0.19 ms", "0.37 ms", "0.75 ms", "1.5 ms", "3 ms",
	"6 ms", "12 ms", "24 ms", "48 ms", "96 ms", "192 ms", "384 ms",
	"768 ms", "1536 ms",
};

static const char * const ssm2518_drc_peak_detector_release_time_text[] = {
	"0 ms", "1.5 ms", "3 ms", "6 ms", "12 ms", "24 ms", "48 ms", "96 ms",
	"192 ms", "384 ms", "768 ms", "1536 ms", "3072 ms", "6144 ms",
	"12288 ms", "24576 ms"
};

static const char * const ssm2518_drc_hold_time_text[] = {
	"0 ms", "0.67 ms", "1.33 ms", "2.67 ms", "5.33 ms", "10.66 ms",
	"21.32 ms", "42.64 ms", "85.28 ms", "170.56 ms", "341.12 ms",
	"682.24 ms", "1364 ms",
};

static SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_attack_time_enum,
	SSM2518_REG_DRC_2, 4, ssm2518_drc_peak_detector_attack_time_text);
static SOC_ENUM_SINGLE_DECL(ssm2518_drc_peak_detector_release_time_enum,
	SSM2518_REG_DRC_2, 0, ssm2518_drc_peak_detector_release_time_text);
static SOC_ENUM_SINGLE_DECL(ssm2518_drc_attack_time_enum,
	SSM2518_REG_DRC_6, 4, ssm2518_drc_peak_detector_attack_time_text);
static SOC_ENUM_SINGLE_DECL(ssm2518_drc_decay_time_enum,
	SSM2518_REG_DRC_6, 0, ssm2518_drc_peak_detector_release_time_text);
static SOC_ENUM_SINGLE_DECL(ssm2518_drc_hold_time_enum,
	SSM2518_REG_DRC_7, 4, ssm2518_drc_hold_time_text);
static SOC_ENUM_SINGLE_DECL(ssm2518_drc_noise_gate_hold_time_enum,
	SSM2518_REG_DRC_7, 0, ssm2518_drc_hold_time_text);
static SOC_ENUM_SINGLE_DECL(ssm2518_drc_rms_averaging_time_enum,
	SSM2518_REG_DRC_9, 0, ssm2518_drc_peak_detector_release_time_text);

static const struct snd_kcontrol_new ssm2518_snd_controls[] = {
	SOC_SINGLE("Playback De-emphasis Switch", SSM2518_REG_MUTE_CTRL,
			4, 1, 0),
	SOC_DOUBLE_R_TLV("Master Playback Volume", SSM2518_REG_LEFT_VOL,
			SSM2518_REG_RIGHT_VOL, 0, 0xff, 1, ssm2518_vol_tlv),
	SOC_DOUBLE("Master Playback Switch", SSM2518_REG_MUTE_CTRL, 2, 1, 1, 1),

	SOC_SINGLE("Amp Low Power Mode Switch", SSM2518_REG_POWER2, 4, 1, 0),
	SOC_SINGLE("DAC Low Power Mode Switch", SSM2518_REG_POWER2, 3, 1, 0),

	SOC_SINGLE("DRC Limiter Switch", SSM2518_REG_DRC_1, 5, 1, 0),
	SOC_SINGLE("DRC Compressor Switch", SSM2518_REG_DRC_1, 4, 1, 0),
	SOC_SINGLE("DRC Expander Switch", SSM2518_REG_DRC_1, 3, 1, 0),
	SOC_SINGLE("DRC Noise Gate Switch", SSM2518_REG_DRC_1, 2, 1, 0),

Annotation

Implementation Notes