OpenUSB for FreeBSD?

[Hans Petter Selasky]

On Saturday 17 November 2007, Julian Elischer wrote:
> Hans Petter Selasky wrote:
> > Hi,
> >
> > On Thursday 15 November 2007, Xiaofan Chen wrote:
> >> On 11/12/07, Henrik Brix Andersen <brix at freebsd.org> wrote:
> >>>> Is it possible for some people here to implement a backend
> >>>> (based on ugen?) for FreeBSD?
> >>>
> >>> Interesting - definitely something I will take a look at. Thank you
> >>> for the pointer.
> >>>
> >>>> Or maybe at least improve the current libusb-0.1.x implemenation
> >>>> for FreeBSD.
> >>>
> >>> Yeah, I was looking at backporting some of the features from libusb
> >>> CVS HEAD to libusb-0.1 on FreeBSD a while back and improving FreeBSD
> >>> compatability as well for an application, I work on - but we ended up
> >>> making FreeBSD specific work-arounds in the application instead.
> >>
> >> Could you be a bit more specific? I know there are some missing calls
> >> in FreeBSD. And I have problems with libusb interrupt write with the
> >> default kernel (hangs). It is documented here.
> >> http://lists.freebsd.org/pipermail/freebsd-usb/2007-November/004128.html
> >> But I am not so sure if it is a libusb problem or the kernel USB driver
> >> problem.
> >
> > The problem about clear stall on the interrupt endpoint is a pure device
> > problem. Your USB device must re-queue any lost interrupt packets after
> > clear stall!
> >
> >> The HPS stack seems to be better in this aspect and I got
> >> some libusb application ported from Linux/Windows to
> >> FreeBSD thanks to the help from Hans.
> >>
> >>> The current stable version of libusb certainly makes a lot to wish for
> >>> on FreeBSD.
> >
> > I haven't got time yet to look at the latest version of libusb. I have
> > some plans to make a replacement for /dev/ugen, that can interact on USB
> > interfaces that already have drivers on them. Currently I'm very busy
> > with other USB stuff.
>
> like, err documentation maybe?

Including that :-)

--HPS