struct dvb_frontend

struct dvb_frontend_ops
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Name

struct dvb_frontend_ops — Demodulation information and callbacks for ditialt TV

Synopsis

struct dvb_frontend_ops {
  struct dvb_frontend_info info;
  u8 delsys[MAX_DELSYS];
  void (* release) (struct dvb_frontend* fe);
  void (* release_sec) (struct dvb_frontend* fe);
  int (* init) (struct dvb_frontend* fe);
  int (* sleep) (struct dvb_frontend* fe);
  int (* write) (struct dvb_frontend* fe, const u8 buf[], int len);
  int (* tune) (struct dvb_frontend* fe,bool re_tune,unsigned int mode_flags,unsigned int *delay,enum fe_status *status);
  enum dvbfe_algo (* get_frontend_algo) (struct dvb_frontend *fe);
  int (* set_frontend) (struct dvb_frontend *fe);
  int (* get_tune_settings) (struct dvb_frontend* fe, struct dvb_frontend_tune_settings* settings);
  int (* get_frontend) (struct dvb_frontend *fe,struct dtv_frontend_properties *props);
  int (* read_status) (struct dvb_frontend *fe, enum fe_status *status);
  int (* read_ber) (struct dvb_frontend* fe, u32* ber);
  int (* read_signal_strength) (struct dvb_frontend* fe, u16* strength);
  int (* read_snr) (struct dvb_frontend* fe, u16* snr);
  int (* read_ucblocks) (struct dvb_frontend* fe, u32* ucblocks);
  int (* diseqc_reset_overload) (struct dvb_frontend* fe);
  int (* diseqc_send_master_cmd) (struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd);
  int (* diseqc_recv_slave_reply) (struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply);
  int (* diseqc_send_burst) (struct dvb_frontend *fe,enum fe_sec_mini_cmd minicmd);
  int (* set_tone) (struct dvb_frontend *fe, enum fe_sec_tone_mode tone);
  int (* set_voltage) (struct dvb_frontend *fe,enum fe_sec_voltage voltage);
  int (* enable_high_lnb_voltage) (struct dvb_frontend* fe, long arg);
  int (* dishnetwork_send_legacy_command) (struct dvb_frontend* fe, unsigned long cmd);
  int (* i2c_gate_ctrl) (struct dvb_frontend* fe, int enable);
  int (* ts_bus_ctrl) (struct dvb_frontend* fe, int acquire);
  int (* set_lna) (struct dvb_frontend *);
  enum dvbfe_search (* search) (struct dvb_frontend *fe);
  struct dvb_tuner_ops tuner_ops;
  struct analog_demod_ops analog_ops;
  int (* set_property) (struct dvb_frontend* fe, struct dtv_property* tvp);
  int (* get_property) (struct dvb_frontend* fe, struct dtv_property* tvp);
};

Members

info: embedded struct dvb_tuner_info with tuner properties
delsys[MAX_DELSYS]: Delivery systems supported by the frontend
release: callback function called when frontend is dettached. drivers should free any allocated memory.
release_sec: callback function requesting that the Satelite Equipment Control (SEC) driver to release and free any memory allocated by the driver.
init: callback function used to initialize the tuner device.
sleep: callback function used to put the tuner to sleep.
write: callback function used by some demod legacy drivers to allow other drivers to write data into their registers. Should not be used on new drivers.
tune: callback function used by demod drivers that use DVBFE_ALGO_HW; to tune into a frequency.
get_frontend_algo: returns the desired hardware algorithm.
set_frontend: callback function used to inform the demod to set the parameters for demodulating a digital TV channel. The properties to be used are stored at dvb_frontend.dtv_property_cache;. The demod can change the parameters to reflect the changes needed for the channel to be decoded, and update statistics.
get_tune_settings: callback function
get_frontend: callback function used to inform the parameters actuall in use. The properties to be used are stored at dvb_frontend.dtv_property_cache; and update statistics. Please notice that it should not return an error code if the statistics are not available because the demog is not locked.
read_status: returns the locking status of the frontend.
read_ber: legacy callback function to return the bit error rate. Newer drivers should provide such info via DVBv5 API, e. g. set_frontend;/get_frontend;, implementing this callback only if DVBv3 API compatibility is wanted.
read_signal_strength: legacy callback function to return the signal strength. Newer drivers should provide such info via DVBv5 API, e. g. set_frontend;/get_frontend;, implementing this callback only if DVBv3 API compatibility is wanted.
read_snr: legacy callback function to return the Signal/Noise rate. Newer drivers should provide such info via DVBv5 API, e. g. set_frontend;/get_frontend;, implementing this callback only if DVBv3 API compatibility is wanted.
read_ucblocks: legacy callback function to return the Uncorrected Error Blocks. Newer drivers should provide such info via DVBv5 API, e. g. set_frontend;/get_frontend;, implementing this callback only if DVBv3 API compatibility is wanted.
diseqc_reset_overload: callback function to implement the FE_DISEQC_RESET_OVERLOAD ioctl (only Satellite)
diseqc_send_master_cmd: callback function to implement the FE_DISEQC_SEND_MASTER_CMD ioctl (only Satellite).
diseqc_recv_slave_reply: callback function to implement the FE_DISEQC_RECV_SLAVE_REPLY ioctl (only Satellite)
diseqc_send_burst: callback function to implement the FE_DISEQC_SEND_BURST ioctl (only Satellite).
set_tone: callback function to implement the FE_SET_TONE ioctl (only Satellite).
set_voltage: callback function to implement the FE_SET_VOLTAGE ioctl (only Satellite).
enable_high_lnb_voltage: callback function to implement the FE_ENABLE_HIGH_LNB_VOLTAGE ioctl (only Satellite).
dishnetwork_send_legacy_command: callback function to implement the FE_DISHNETWORK_SEND_LEGACY_CMD ioctl (only Satellite). Drivers should not use this, except when the DVB core emulation fails to provide proper support (e.g. if set_voltage takes more than 8ms to work), and when backward compatibility with this legacy API is required.
i2c_gate_ctrl: controls the I2C gate. Newer drivers should use I2C mux support instead.
ts_bus_ctrl: callback function used to take control of the TS bus.
set_lna: callback function to power on/off/auto the LNA.
search: callback function used on some custom algo search algos.
tuner_ops: pointer to struct dvb_tuner_ops
analog_ops: pointer to struct analog_demod_ops
set_property: callback function to allow the frontend to validade incoming properties. Should not be used on new drivers.
get_property: callback function to allow the frontend to override outcoming properties. Should not be used on new drivers.

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