[linux-dvb] WinTV-CI from Hauppauge

Steven Toth stoth at linuxtv.org
Sun Dec 23 17:53:00 CET 2007

Luc Brosens wrote:
> Steven Toth wrote:
>> Luc Brosens wrote:
>>> all,
>>> so I got the WinTV-CI from Hauppauge.  Nice little thing, powered
>>> through the USB(2)-port.
>>> On the box, is says "Common-Interface extension over USB".
>> Cool.
>>> There's software with it, but of course only XP and Vista... which are
>>> out of the question ;-)
>>> I'm contacting Hauppauge's tech support for specs, let's hope they're
>>> responsive.
>> They won't be able to help, I can - but not for a few weeks.
>> I'm expecting to release public USB protocol information during Jan 08
>> which would allow a GPL driver to be written. Right now I have nothing
>> to give you.
>> If you feel adventurous, feel free to start now by reverse engineering
>> the protocol with a windows software USB sniffer, it won't be wasted
>> work. The device is Cypress FX2 based (which Linux has lots of examples
>> for) and it loads custom firmware (which Linux has lots of examples of)
>> apart from that I think the protocol is very simple.
>> How to integrate it with the kernel s/w demux would be an interesting
>> debate.
>> Let me know if I can help.
>> Regards,
>> - Steve
> Steve,
> thanx for the reply. Looking forward to your USB information next month.
> The initial response from Hauppauge is somewhat promising : UK tech support told me to contact US tech support, let's see how it evolves.

They may give you the stock answer, or they may just not push this 
request into engineering. Most likely their request will land on my 
desk, in which case I tend to give them a stock answer.... 'Nothing Yet, 
nothing announced'.

I will publish the CI doc here as soon as it's available though.

> Reverse engineering the protocol was on my todo list, XP here I come...
> If you have a specific USB sniffer software in mind, I'd be interested to get a reference from you.

Nothing specific springs to mind although I suspect many other members 
can recommend something. Way back, I used a USB Sniffer and it's name 
escapes me. It was a free tool. try googling for USB sniffer, Sniff USB, 
USB logger etc.

> As for integrating with the demux interface, I would initially be happy implementing a command line utility that descrambles stored recordings
> (something I've been bugging this list with for weeks now ..) The idea is to have MythTV record multiple streams using multiple cards and do the
> descrambling in the postprocessing tasks. Live-viewing (which is where the demux-integration comes into play) is less important to me.

Ok, sounds good.

> Your help in this endeavor will be very much appreciated, let me know how you'd like to organize things.

Great. Let me push internally for the document to be released to the 
public, feel free to ping me privately at my stoth at hauppauge.com 
account mid-to-late Jan if nothing has been published.



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