Skip site navigation (1)Skip section navigation (2)
Date:      Tue, 10 Sep 2002 16:41:12 +0100
From:      Andrew Boothman <andrew@cream.org>
To:        Andrew Boothman <andrew@cream.org>
Cc:        questions@freebsd.org
Subject:   Re: Problem with USB Webcam under OHCI?
Message-ID:  <3D7E1298.1050205@cream.org>
References:  <3D7A9E77.9040104@cream.org>

next in thread | previous in thread | raw e-mail | index | archive | help
Andrew Boothman wrote:

>
> But when I try to use vid to take an image I get :
>
> ohci_device_isoc_start: not implemented
>
> on the console. Worse, the vid process hangs and if I try to kill it 
> (but not before then) the whole machine hangs!
>
> I searched the archives and googled but I couldn't see anything 
> relevent. I do note that the controller that the cam worked on was 
> UHCI, but failed on an OHCI one. I've no idea if that's relevent though.

I'm going to answer my own question, so that the answer is in the 
-questions archive should anyone else need it again.

After reading the FreeBSD USB Page - http://www.etla.net/~n_hibma/usb/ - 
and reading the archives of the bsd-usb mailing archive contained on 
that site, it appears that isochronous transfers on OHCI controllers are 
only supported on -current at present not on -stable and hence not in 
any -releases. Isochronous transfers on UHCI controllers are supported 
on all versions of FreeBSD.

It appears that we'll have to wait until there is an MFC of the relevent 
code before this will work on -stable.

I hope this helps someone in the future.

Andrew.



To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message




Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3D7E1298.1050205>