sound/soc/codecs/pcm512x.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/pcm512x.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/pcm512x.c
Extension
.c
Size
48070 bytes
Lines
1800
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: exported/initcall integration point
Status
integration 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 pcm512x_priv {
	struct regmap *regmap;
	struct clk *sclk;
	struct regulator_bulk_data supplies[PCM512x_NUM_SUPPLIES];
	struct notifier_block supply_nb[PCM512x_NUM_SUPPLIES];
	int fmt;
	int pll_in;
	int pll_out;
	int pll_r;
	int pll_j;
	int pll_d;
	int pll_p;
	unsigned long real_pll;
	unsigned long overclock_pll;
	unsigned long overclock_dac;
	unsigned long overclock_dsp;
	int mute;
	struct mutex mutex;
	unsigned int bclk_ratio;
	int force_pll_on;
};

/*
 * 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 PCM512x_REGULATOR_EVENT(n) \
static int pcm512x_regulator_event_##n(struct notifier_block *nb, \
				      unsigned long event, void *data)    \
{ \
	struct pcm512x_priv *pcm512x = container_of(nb, struct pcm512x_priv, \
						    supply_nb[n]); \
	if (event & REGULATOR_EVENT_DISABLE) { \
		regcache_mark_dirty(pcm512x->regmap);	\
		regcache_cache_only(pcm512x->regmap, true);	\
	} \
	return 0; \
}

PCM512x_REGULATOR_EVENT(0)
PCM512x_REGULATOR_EVENT(1)
PCM512x_REGULATOR_EVENT(2)

static const struct reg_default pcm512x_reg_defaults[] = {
	{ PCM512x_RESET,             0x00 },
	{ PCM512x_POWER,             0x00 },
	{ PCM512x_MUTE,              0x00 },
	{ PCM512x_DSP,               0x00 },
	{ PCM512x_PLL_REF,           0x00 },
	{ PCM512x_DAC_REF,           0x00 },
	{ PCM512x_DAC_ROUTING,       0x11 },
	{ PCM512x_DSP_PROGRAM,       0x01 },
	{ PCM512x_CLKDET,            0x00 },
	{ PCM512x_AUTO_MUTE,         0x00 },
	{ PCM512x_ERROR_DETECT,      0x00 },
	{ PCM512x_DIGITAL_VOLUME_1,  0x00 },
	{ PCM512x_DIGITAL_VOLUME_2,  0x30 },
	{ PCM512x_DIGITAL_VOLUME_3,  0x30 },
	{ PCM512x_DIGITAL_MUTE_1,    0x22 },
	{ PCM512x_DIGITAL_MUTE_2,    0x00 },
	{ PCM512x_DIGITAL_MUTE_3,    0x07 },
	{ PCM512x_OUTPUT_AMPLITUDE,  0x00 },
	{ PCM512x_ANALOG_GAIN_CTRL,  0x00 },
	{ PCM512x_UNDERVOLTAGE_PROT, 0x00 },
	{ PCM512x_ANALOG_MUTE_CTRL,  0x00 },
	{ PCM512x_ANALOG_GAIN_BOOST, 0x00 },
	{ PCM512x_VCOM_CTRL_1,       0x00 },
	{ PCM512x_VCOM_CTRL_2,       0x01 },
	{ PCM512x_BCLK_LRCLK_CFG,    0x00 },
	{ PCM512x_MASTER_MODE,       0x7c },
	{ PCM512x_GPIO_DACIN,        0x00 },
	{ PCM512x_GPIO_PLLIN,        0x00 },
	{ PCM512x_SYNCHRONIZE,       0x10 },
	{ PCM512x_PLL_COEFF_0,       0x00 },
	{ PCM512x_PLL_COEFF_1,       0x00 },
	{ PCM512x_PLL_COEFF_2,       0x00 },
	{ PCM512x_PLL_COEFF_3,       0x00 },
	{ PCM512x_PLL_COEFF_4,       0x00 },
	{ PCM512x_DSP_CLKDIV,        0x00 },
	{ PCM512x_DAC_CLKDIV,        0x00 },
	{ PCM512x_NCP_CLKDIV,        0x00 },
	{ PCM512x_OSR_CLKDIV,        0x00 },
	{ PCM512x_MASTER_CLKDIV_1,   0x00 },
	{ PCM512x_MASTER_CLKDIV_2,   0x00 },
	{ PCM512x_FS_SPEED_MODE,     0x00 },
	{ PCM512x_IDAC_1,            0x01 },
	{ PCM512x_IDAC_2,            0x00 },
	{ PCM512x_I2S_1,             0x02 },
	{ PCM512x_I2S_2,             0x00 },

Annotation

Implementation Notes