[mythtv-users] Report: Watch out! UB435-Q V2 is NOT the same as UB435-Q

[Jarod Wilson]

On Apr 29, 2011, at 3:11 PM, Martin, Charles wrote:

> Hi all –
>  
>    So what’s going on with this?  I actually need to get this going.  Jarod, Devin, any further news?
> I’m also willing to help, if you want to collaborate.

I've been quite tied up with other things[*] and mostly forgot about this, as I
don't have the affected hardware. Last I talked to Devin, he hadn't had time to
work on it either, and various other higher-priority tasks had taken precedence.

If you need it going soon, Devin and KernelLabs' services may be for hire:
    http://www.kernellabs.com/blog/?page_id=156

[*] read: IR device drivers


> On Oct 29, 2010, at 2:37 PM, Devin Heitmueller wrote:
>  
> > On Fri, Oct 29, 2010 at 2:04 PM, Jarod Wilson <jarod at wilsonet.com> wrote:
> >> On Oct 15, 2010, at 6:07 PM, Jarod Wilson wrote:
...
> >> So a spot of bad news here... I've been poking at one of Gavin's sticks inside a VM he set up for me, simultaneous with talking to one of the upstream em28xx driver authors. We now have a very good understanding of why the stick isn't working.
> >> 
> >> All known prior em28xx-based tuner sticks have had at least one isochronous usb endpoint, with a max packet size of 940 bytes, typically. This stick only has bulk usb endpoints and a max packet size of 512. Supporting this stick is actually going to require a fair bit of work in the em28xx driver core to support using bulk transfer instead of isochronous transfer.
> >> 
> >> Short version: don't buy this stick right now, its going to be a little while before its actually supported.
> > 
> > Jarod,
> > 
> > Just an FYI:  bulk support for em2874/em2884 is on my todo list for
> > the near future.
>  
> Ah, very cool. I'm inclined to wait and let you do that part, since you know em28xx much better than I do, and I'll just focus on the device-specific implementation details (gpio settings, wiring up tuner and demod, etc). I'm assuming you have some other manufacturer's em2874/em2884 based devices to work on this for... :)


-- 
Jarod Wilson
jarod at wilsonet.com