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[media] dvb_frontend.h: Document struct dvb_tuner_ops

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The struct dvb_tuner_ops contains lots of callbacks used
by tuners. Document them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab 2015-08-22 11:13:37 -03:00
parent 1a77763428
commit 465291a0eb
1 changed files with 47 additions and 1 deletions
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48
drivers/media/dvb-core/dvb_frontend.h
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@ -192,7 +192,53 @@ enum dvbfe_search {
DVBFE_ALGO_SEARCH_ERROR = (1 << 31),
};
/**
* struct dvb_tuner_ops - Tuner information and callbacks
*
* @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;.
* @set_analog_params: callback function used to tune into an analog TV
* channel on hybrid tuners. It passes @analog_parameters;
* to the driver.
* @calc_regs: callback function used to pass register data settings
* for simple tuners.
* @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.
* @set_frequency: Set a new frequency. Please notice that using
* set_params is preferred.
* @set_bandwidth: Set a new frequency. Please notice that using
* set_params is preferred.
* @set_state: callback function used on some legacy drivers that
* don't implement set_params in order to set properties.
* Shouldn't be used on new drivers.
* @get_state: callback function used to get properties by some
* legacy drivers that don't implement set_params.
* Shouldn't be used on new drivers.
*
* NOTE: frequencies used on get_frequency and set_frequency are in Hz for
* terrestrial/cable or kHz for satellite.
*
*/
struct dvb_tuner_ops {
struct dvb_tuner_info info;