[linux-dvb] frontend-problem with TT DVB-C cards

Johannes Stezenbach js at linuxtv.org
Thu Feb 17 23:03:28 CET 2005

Armin Wies wrote:
> > > DVB: registering new adapter (Technotrend/Hauppauge WinTV DVB-C rev2.X).
> > > ves1820: ves1820_readreg(): readreg error (reg == 0x1a,ret == -121)
> > > dvb-ttpci: A frontend driver was not found for device 1131/7146 subsystem 13c2/0002
> Well ...
> frontend 1:
>    tin box: ALPS TDBE2-031A
>    frontend driver: ves1820
>    demodulator location: ??
>    demodulator: Philips VES1820 @0x09
>    PLL: Mitel sp5659 @ 0x62
> There's a TBE2-031A and a VES1820,

> but I can't find anything that sounds like "Mitel sp5659".
> I'm a boody greenhorn, I just don't know what to look for...

The pll is inside the tin-box, if it is an TDBE2-031A it will
have a mitel pll. Anyway, we can't talk to the ves1820
(-121 is EREMOTEIO, see ves1820.c), so maybe the demod address
is wrong for your card (I don't have a datasheet for the
ALPS TDBE2-031A so I don't know if that's possible). Does
the card work in Windoze?

Try to replace:

static struct ves1820_config alps_tdbe2_config = {
	        .demod_address = 0x09,

With values in range 0x08 ... 0x0f.

If that's not it, then maybe there's a GPIO that needs to be set
to wake up the ves1820? (That's why I asked if the card works for someone


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