[linux-dvb] Suggestions for T750

Markus Rechberger mrechberger at gmail.com
Tue Apr 24 13:04:08 CEST 2007


On 4/24/07, Markus Rechberger <mrechberger at gmail.com> wrote:
> On 4/24/07, John Newbigin <jnewbigin at optusnet.com.au> wrote:
> > Markus Rechberger wrote:
> > > Hi,
> > >
> > > did you see the existing xc3028 driver on mcentral.de?
> > >
> > > http://mcentral.de/hg/~mrec/v4l-dvb-experimental/
> > > xc3028-tuner.c (it's implemented in the em28xx, saa7134 and cx88 there)
> > I xc3028 code I have seen is tied to the em28xx driver.  Are there any
> > instructions for using this experimental code?  I am currently working off
> >
> > http://linuxtv.org/hg/v4l-dvb
>
> the experimental tree is just the same as
> http://linuxtv.org/hg/v4l-dvb it just includes support for around 60
> more devices
>
> http://linuxtv.org/repo/
>
> (just replace http://linuxtv.org/hg/v4l-dvb with
> http://linuxtv.org/hg/v4l-dvb-experimental)

this was too fast it should be:
http://mcentral.de/hg/~mrec/v4l-dvb-experimental

>
> The code isn't tied to the em28xx in the experimental tree (it's used
> with cx88, saa7134 and em28xx)
>
> Best would be to look at em2880-dvb how it's implemented there.
>
> http://mcentral.de/wiki/index.php/Em2880#Installation
>
> the installation instruction for em28xx based devices should also
> apply for your version.
>
> best regards,
>
> Markus
>
> >
> >
> > I have the correct firmware for this card but I don't know how to
> > 'package' it to work with the 3028 driver.
> >
> > Where possible I certainly want to use reuse the existing code.
> >
> > The T750 is a SAA7134(5) based PCI card.  The card also has digital
> > based on the XL10353 and QT1010.
> >
> > John.
> > >
> > > That driver supports xc3028, xc2028, xc3018 chips, you might have some
> > > issues with the firmwares, best would be to try existing packages.
> > >
> > > What kind of device is that?
> > > PCI/Conexant, or something else?
> > >
> > > Markus
> > >
> > > On 4/23/07, John Newbigin <jnewbigin at optusnet.com.au> wrote:
> > >> Here I go replying to myself again.
> > >>
> > >> I have had some success with loading the firmware.  I has a suspicion
> > >> that I needed to twiddle the GPIO pins but could not get it to work.
> > >> Studying the xc3028 driver showed me the way.  The GPIO needs to be
> > >> first cleared and then set before continuing.
> > >>
> > >> The xc3028 is very similar to the xc2028 and they could use a common
> > >> driver.  I don't understand how the firmware file is stored for the
> > >> xc3028 though.  I assume that multiple chunks are encoded into one file
> > >> somehow.
> > >>
> > >> There is also another firmware chunk which is needed for FM radio
> > >> support so I don't know how that would be added.
> > >>
> > >> Anyway, I have loading firmware but still no TV.  I think I am close
> > >> though.
> > >>
> > >> i2c traces and firmware can be downloaded from here
> > >> http://www.chrysocome.net/downloads/t750-logs-0.1.tar.gz
> > >>
> > >> I'll try and clean up my code and post a patch tomorrow.
> > >>
> > >> John.
> > >>
> > >> John Newbigin wrote:
> > >> > I have made some slow progress with the T750.  I have implemented
> > >> > loading the firmware for the CX2028 but I have hit a problem.
> > >> >
> > >> > After loading the firmware, there are some commands (known as the
> > >> > 'MAGIC VALUES') which need to be issued.  These are the same as for
> > >> > the CX3028.  After this final write, my card does another write and
> > >> > then a read, but when I attempt the final read command the chip locks
> > >> > up and returns BUSY.
> > >> >
> > >> > Once this happens, the card has to be powered off to reset
> everything.
> > >> >
> > >> > Can anyone offer some suggestions of things to try.  I have the
> > >> > feeling I am very close.
> > >> >
> > >> > I have i2c traces if anyone wants to see them but they are quite
> > >> large.
> > >> >
> > >> > John.
> > >> >
> > >> > _______________________________________________
> > >> > linux-dvb mailing list
> > >> > linux-dvb at linuxtv.org
> > >> > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> > >> >
> > >>
> > >>
> > >> _______________________________________________
> > >> linux-dvb mailing list
> > >> linux-dvb at linuxtv.org
> > >> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
> > >>
> > >
> > >
> >
> >
>
>
> --
> Markus Rechberger
>


-- 
Markus Rechberger



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