drivers/media/dvb-frontends/au8522.h

Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/au8522.h

File Facts

System
Linux kernel
Corpus path
drivers/media/dvb-frontends/au8522.h
Extension
.h
Size
1621 bytes
Lines
80
Domain
Driver Families
Bucket
drivers/media
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 au8522_led_config {
	u16 vsb8_strong;
	u16 qam64_strong;
	u16 qam256_strong;

	u16 gpio_output;
	/* unset hi bits, set low bits */
	u16 gpio_output_enable;
	u16 gpio_output_disable;

	u16 gpio_leds;
	u8 *led_states;
	unsigned int num_led_states;
};

struct au8522_config {
	/* the demodulator's i2c address */
	u8 demod_address;

	/* Return lock status based on tuner lock, or demod lock */
#define AU8522_TUNERLOCKING 0
#define AU8522_DEMODLOCKING 1
	u8 status_mode;

	struct au8522_led_config *led_cfg;

	enum au8522_if_freq vsb_if;
	enum au8522_if_freq qam_if;
};

#if IS_REACHABLE(CONFIG_DVB_AU8522_DTV)
extern struct dvb_frontend *au8522_attach(const struct au8522_config *config,
					  struct i2c_adapter *i2c);
#else
static inline
struct dvb_frontend *au8522_attach(const struct au8522_config *config,
				   struct i2c_adapter *i2c)
{
	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
	return NULL;
}
#endif /* CONFIG_DVB_AU8522 */

/* Other modes may need to be added later */
enum au8522_video_input {
	AU8522_COMPOSITE_CH1 = 1,
	AU8522_COMPOSITE_CH2,
	AU8522_COMPOSITE_CH3,
	AU8522_COMPOSITE_CH4,
	AU8522_COMPOSITE_CH4_SIF,
	AU8522_SVIDEO_CH13,
	AU8522_SVIDEO_CH24,
};

enum au8522_audio_input {
	AU8522_AUDIO_NONE,
	AU8522_AUDIO_SIF,
};
#endif /* __AU8522_H__ */

Annotation

Implementation Notes