[linux-dvb] Re: driver ioctl CA_SET_DESCR

[Johannes Stezenbach <js@convergence.de>]

On Mon, Feb 24, 2003 at 12:03:46PM +0000, Steven Toth wrote:
> >>Using the linuxtv-dvb-1.0.0-pre1 driver, I'm trying to pass valid CWs to
> >>the ioctl but the card is refusing to decrypt the stream.
> >>
> >>I can do this successfully using earlier version of the driver and a
> >>'special' version of the firmware.
> >>
> >>Can anyone confirm whether this functionality is/should be working with
> >>the latest driver release.
> >
> >
> >If this would work, it would mean that the DVB card would decrypt without
> >a CAM - that's not how it's supposed to work ;-) The new Link Layer
> >CAM interface definitely need a _real_ CAM to work.

The CA_SET_DESCR ioctl is there because it is necessary for implementing
software based CA. It is not implemented in the public
firmware for exactly the same reason ;-(

> Another question on a related subject. The firmware currently in the 
> av7100 card... this is obviously changing and evolving over time.
> 
> I'm interested (maybe) in changing the firmware for my own needs. How 
> does the linuxtv development team manage changes to the firmware, do 
> they use specific tools and are their any documentation on the firmware 
> specifics?

That's a difficult topic.

Regards,
Johannes


-- 
Info:
To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe linux-dvb" as subject.