OpenUSB for FreeBSD?
xiaofanc at gmail.com
Sat Nov 17 05:32:01 PST 2007
On Nov 17, 2007 7:31 PM, Hans Petter Selasky <hselasky at c2i.net> wrote:
> On Saturday 17 November 2007, Xiaofan Chen wrote:
> > On Nov 17, 2007 4:38 PM, Hans Petter Selasky <hselasky at c2i.net> wrote:
> > > > 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.htm
> > > >l 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!
> > Sorry but that problem does not occur using the HPS stack but the stock
> > FreeBSD 7 Current kernel (actually in FreeBSD 6.1 and 6.2 as well
> > last time I tried it). Under HPS stack, it works.
> > And I remember that Warner said that the Current kernel does not clear
> > stall. Quote from
> > http://lists.freebsd.org/pipermail/freebsd-usb/2007-July/003751.html Warner
> > Losh wrote:
> > "Remind me when is this clear endpoint stall sent? In 7.x we don't
> > send one on pipe open unless the device is quirked to require one. On
> > RELENG_6, at least as of today, we never send one on the open."
> Ok, but is that with or without that patch I sent you for Ugen ?
I need the single line patch for ugen. I understand that the
firmware may still have the bug dealing with clear endpoint stall.
It is documented here:
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