[linux-dvb] Re: Is DVB the right place for FusionHDTV card driver?

[Holger Waechtler <holger@qanu.de>]

John Dalgliesh wrote:
> On Tue, 27 Jul 2004, Holger Waechtler wrote:
>
> > Mac Michaels wrote:
> >
> > > I own a  DViCO FusionHDTV 3 Gold card and am writing a
> > > driver for it. I have modified the cx88 V4L2 driver to
> > > almost work for NTSC-M. All video and tuner functions work,
> > > no sound yet.
> > >
> > > I want to write a driver for the ATSC transport stream. Is
> > > DVB or V4L2 the best place to implement a driver for DViCO
> > > FusionHDTV?
> > It would be nice to see theDVB frontend API extended so that it
> > seamlessly supports all digital TV frontends including ATSC.
>
> So, basically, is that a yes?
yes.

> I would have thought linux-dvb was the
> perfect place for it ... it's all MPEG-2 TS data, whether it's DVB or
> ATSC. Initially you may have to reinterpret some of the frontend
> tuning parameters for the different modulation scheme in 8VSB, but after
> that linux-dvb has all the framework to get the transport stream into user
> space, and most likely some apps will work with it unmodified (i.e. as
> long as they don't look for DVB specifics).
right...


> When that all works then the frontend struct/API could be extended if
> necessary (unless all params are always 'auto' in 8VSB :)
you only need to add a new enum fe_type FE_ATSC or FE_8VSB, a new enum 
fe_modulation, and then add your parameter struct to the union u in 
struct dvb_frontend_parameters.


> > > The card uses a Microtune 4042 FI5 tuner, LG DT3302
> > > receiver, and CX23881 to interface to the PCI bus among
> > > other things. Is there already DVB code to handle any of
> > > these chips?
> > as far I know, not. But the SAA7146 and the bt8xx DVB drivers are based
> > on the corresponding V4L drivers, too.
>
> I don't know if it has made it into CVS yet, but there is a driver for the
> digital stream from the CX23883 that has recently been written by Chris
> Pascoe to get the DVB-T version of the Fusion HDTV running. It may be a
> good starting point! See <http://www.itee.uq.edu.au/~chrisp/DVICO-Linux/>
Would you please be so kind and take care about this code so that it 
will make it into CVS? Maybe you need to contact the original author and 
ask if it's ok for him and he wants to continue development in the 
linuxtv CVS tree.

Please let us know whom of you needs a r/w CVS access and send us 
(off-list) your public ssh2 keys so that we can create your account.


> Also, I wrote a driver for the Microtune 4042 myself as part of a project
> to support the DVICO FusionHDTV II card on the Mac. (This stopped when the
> guy testing it discovered he wasn't in a place that could receive ATSC :)
> So I have no idea if it actually works but it might do ... and also I
> think I remember that tuner being mentioned on this list at some stage...?
:)

Holger