Date: Sat, 17 Mar 2012 09:58:53 +0100 From: Holm Tiffe <holm@freibergnet.de> To: freebsd-usb@freebsd.org Subject: Re: USB UHCI Problems on 8-Stable Message-ID: <20120317085853.GA53895@beast.freibergnet.de>
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>Hi,
>
>The BULK transfer stops by a stall. I suspect the UHCI is receiving more data
>than it can, and is hardware programmed to stop it looks like. I can't change
>that behaviour. It is not a bug in the FreeBSD USB driver I think.
>
>Try this patch to /usr/ports/devel/openocd/
>
>make extract patch
>
>ee ./work/openocd-0.5.0/src/jtag/drivers/jlink.c
Uhh, may I use Vi? :-)
>
>Change:
>
>result = jlink_usb_read(jlink, in_length);
>
>Into:
>
>/* must read at least one packet at a time! */
>result = jlink_usb_read(jlink, in_length + ((-in_length) & 63));
>
>Then re-compile and try again!
>
>--HPS
Ok, I'll try that patch(~ sunday eavening, I'm out of town currntly),
but it adresses the problem with openocd. ( which is good anyways).
I is still a bug in FreeBSD's driver that there is now way to
wake up the controller again and I think that should be changed.
(please remember, most Kerenels are running with compiled in drivers, so
thie singe solution is a reboot to reactivate the controller.
I dont know that much about USB, but I sure that FreeBSDs behavior in this
case isn't that what we really want. I think usbconfig -d ugen1.1 reset
schould be made working..
Regards,
Holm
--
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