drivers/media/dvb-frontends/dib8000.c

Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/dib8000.c

File Facts

System
Linux kernel
Corpus path
drivers/media/dvb-frontends/dib8000.c
Extension
.c
Size
136491 bytes
Lines
4539
Domain
Driver Families
Bucket
drivers/media
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 i2c_device {
	struct i2c_adapter *adap;
	u8 addr;
	u8 *i2c_write_buffer;
	u8 *i2c_read_buffer;
	struct mutex *i2c_buffer_lock;
};

enum param_loop_step {
	LOOP_TUNE_1,
	LOOP_TUNE_2
};

enum dib8000_autosearch_step {
	AS_START = 0,
	AS_SEARCHING_FFT,
	AS_SEARCHING_GUARD,
	AS_DONE = 100,
};

enum timeout_mode {
	SYMBOL_DEPENDENT_OFF = 0,
	SYMBOL_DEPENDENT_ON,
};

struct dib8000_state {
	struct dib8000_config cfg;

	struct i2c_device i2c;

	struct dibx000_i2c_master i2c_master;

	u16 wbd_ref;

	u8 current_band;
	u32 current_bandwidth;
	struct dibx000_agc_config *current_agc;
	u32 timf;
	u32 timf_default;

	u8 div_force_off:1;
	u8 div_state:1;
	u16 div_sync_wait;

	u8 agc_state;
	u8 differential_constellation;
	u8 diversity_onoff;

	s16 ber_monitored_layer;
	u16 gpio_dir;
	u16 gpio_val;

	u16 revision;
	u8 isdbt_cfg_loaded;
	enum frontend_tune_state tune_state;
	s32 status;

	struct dvb_frontend *fe[MAX_NUMBER_OF_FRONTENDS];

	/* for the I2C transfer */
	struct i2c_msg msg[2];
	u8 i2c_write_buffer[4];
	u8 i2c_read_buffer[2];
	struct mutex i2c_buffer_lock;
	u8 input_mode_mpeg;

	u16 tuner_enable;
	struct i2c_adapter dib8096p_tuner_adap;
	u16 current_demod_bw;

	u16 seg_mask;
	u16 seg_diff_mask;
	u16 mode;
	u8 layer_b_nb_seg;
	u8 layer_c_nb_seg;

	u8 channel_parameters_set;
	u16 autosearch_state;
	u16 found_nfft;
	u16 found_guard;
	u8 subchannel;
	u8 symbol_duration;
	unsigned long timeout;
	u8 longest_intlv_layer;
	u16 output_mode;

	/* for DVBv5 stats */
	s64 init_ucb;
	unsigned long per_jiffies_stats;
	unsigned long ber_jiffies_stats;

Annotation

Implementation Notes