SYNOPSIS

struct dvb_tuner_ops {
struct dvb_tuner_info info;
int (* release) (struct dvb_frontend *fe);
int (* init) (struct dvb_frontend *fe);
int (* sleep) (struct dvb_frontend *fe);
int (* suspend) (struct dvb_frontend *fe);
int (* resume) (struct dvb_frontend *fe);
int (* set_params) (struct dvb_frontend *fe);
int (* set_analog_params) (struct dvb_frontend *fe, struct analog_parameters *p);
int (* set_config) (struct dvb_frontend *fe, void *priv_cfg);
int (* get_frequency) (struct dvb_frontend *fe, u32 *frequency);
int (* get_bandwidth) (struct dvb_frontend *fe, u32 *bandwidth);
int (* get_if_frequency) (struct dvb_frontend *fe, u32 *frequency);
#define TUNER_STATUS_LOCKED 1
#define TUNER_STATUS_STEREO 2
int (* get_status) (struct dvb_frontend *fe, u32 *status);
int (* get_rf_strength) (struct dvb_frontend *fe, u16 *strength);
int (* get_afc) (struct dvb_frontend *fe, s32 *afc);
int (* calc_regs) (struct dvb_frontend *fe, u8 *buf, int buf_len);
int (* set_frequency) (struct dvb_frontend *fe, u32 frequency);
int (* set_bandwidth) (struct dvb_frontend *fe, u32 bandwidth);
};

MEMBERS

info

embedded struct dvb_tuner_info with tuner properties

release

callback function called when frontend is dettached. drivers should free any allocated memory.

init

callback function used to initialize the tuner device.

sleep

callback function used to put the tuner to sleep.

suspend

callback function used to inform that the Kernel will suspend.

resume

callback function used to inform that the Kernel is resuming from suspend.

set_params

callback function used to inform the tuner to tune into a digital TV channel. The properties to be used are stored at dvb_frontend.dtv_property_cache;. The tuner demod can change the parameters to reflect the changes needed for the channel to be tuned, and update statistics. This is the recommended way to set the tuner parameters and should be used on newer drivers.

set_analog_params

callback function used to tune into an analog TV channel on hybrid tuners. It passes analog_parameters; to the driver.

set_config

callback function used to send some tuner-specific parameters.

get_frequency

get the actual tuned frequency

get_bandwidth

get the bandwitdh used by the low pass filters

get_if_frequency

get the Intermediate Frequency, in Hz. For baseband, should return 0.

get_status

returns the frontend lock status

get_rf_strength

returns the RF signal strengh. Used mostly to support analog TV and radio. Digital TV should report, instead, via DVBv5 API (dvb_frontend.dtv_property_cache;).

get_afc

Used only by analog TV core. Reports the frequency drift due to AFC.

calc_regs

callback function used to pass register data settings for simple tuners. Shouldn't be used on newer drivers.

set_frequency

Set a new frequency. Shouldn't be used on newer drivers.

set_bandwidth

Set a new frequency. Shouldn't be used on newer drivers.

NOTE

frequencies used on get_frequency and set_frequency are in Hz for terrestrial/cable or kHz for satellite.

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