Wolfgang Wegner wrote:
> On Mon, Sep 17, 2007 at 03:38:12PM +0400, Manu Abraham wrote:
>> Right.
>>
>> Do you think we can generalize it to a DUMMY frontend where some fields
>> are just queried ?
>>
>> If so it would be a matter of just defining a "dummy name" for the
>> general category of headless devices where some statistics can be
>> queried. Or do you think it would be right to have it called as DVB-ASI
>> frontend itself ?
>>
>> (In my thoughts it would be incorrect probably to call it DVB-ASI, since
>> DVB-ASI doesn't get specified as a delivery system as defined by a
>> frontend, but just as a transport method only)
>>
>> But in that case each of those headless devices will need to have a
>> specific name. Though not too many headless devices come to my mind though.
>
> Right, at the moment I can only think of the parallel (LVDS) interface
> and ASI, where the ASI "frontend" might have some more capabilities due
> to the encapsulation.
>
> Apart from that, i am totally fine with the dummy approach. And, as you
> mentioned, it is more in-line with the delivery system definition.
Ok, something like this would help ?
Regards,
Manu
/*
* Capability bit field for DVB-ASI
* References:
* Cenelec EN 50083-9
*/
enum dvbfe_dvbasi_transmission {
DVBFE_DVBASI_SERIAL = (1 << 31),
DVBFE_DVBASI_PARALLEL = (1 << 30)
};
struct dvbfe_dvbasi_info {
enum dvbfe_asi_transmission transmission;
__u8 pad[32];
};
/* DVB Frontend related Information */
struct dvbfe_info {
char name[128];
/* For Multi Standard tuners, set "delivery"
* to the relevant delivery system to retrieve the
* relevant delivery system related information.
*/
enum dvbfe_delsys delivery;
union {
struct dvbfe_dvbs_info dvbs;
struct dvbfe_dss_info dss;
struct dvbfe_dvbs2_info dvbs2;
struct dvbfe_dvbc_info dvbc;
struct dvbfe_dvbt_info dvbt;
struct dvbfe_dvbh_info dvbh;
struct dvbfe_atsc_info atsc;
struct dvbfe_dvbasi_info asi;
__u8 pad[128];
} delsys;
__u32 frequency_min;
__u32 frequency_max;
__u32 frequency_step;
__u32 frequency_tolerance;
__u32 symbol_rate_min;
__u32 symbol_rate_max;
__u32 symbol_rate_tolerance;
enum fe_spectral_inversion inversion;
__u8 pad[128];
};
#define DVBFE_GET_INFO _IOWR('o', 85, struct dvbfe_info)
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