On Monday 10 March 2008, Vladimir Terziev wrote: > Hi, > > thanks, but i thought there is some userland-based solution ... > > If i remove the "clear stall" command from the kernel, how will this > affect the other USB devices ? Is there a guarantee they will continue to > function as normal ?
You might loose an USB packet if the Data-toggle is wrong. --HPS > > Vladimir > > > On Fri, 7 Mar 2008 18:55:46 +0100 > > Hans Petter Selasky <[EMAIL PROTECTED]> wrote: > > Hi, > > > > You could search in /sys/dev/usb for xxx_pipe_open() or something like > > that, and remove the clear stall command from that function and the > > recompile your kernel and modules. > > > > --HPS > > > > On Friday 07 March 2008, Vladimir Terziev wrote: > > > On Thu, 6 Mar 2008 18:07:44 +0100 > > > > > > Hans Petter Selasky <[EMAIL PROTECTED]> wrote: > > > > On Thursday 06 March 2008, Vladimir Terziev wrote: > > > > > Hi, > > > > > > > > > > i have ACS ACR38T Smart card reader/write device > > > > > (idVendor=0x072f, > > > > > idProduct=0x90cc), which is an USB stick. I try to make it to work > > > > > under FreeBSD (trys have been done on 5.4, 5.5 and 6.2). > > > > > > > > > > The device has 3 endpoints -- interrupt-in, configured as > > > > > /dev/ugenX.1 and bulk-in/bulk-out, configured as /dev/ugenX.2. > > > > > > > > > > Neither the driver from openct-0.6.14 port nor the driver from > > > > > ccid-1.3.5 port work for the device. > > > > > > > > > > The communication with the device gets stuck on BULK-OUT > > > > > operations. write(2) calls to /dev/ugenX.2 hang forever despite the > > > > > timeout set with USB_SET_TIMEOUT. > > > > > > > > > > The device has been tested to work under Windoze, so as general, > > > > > it's not broken, but just irresponsive. > > > > > > > > > > Could someone give me some clues about the nature of the > > > > > problem ? > > > > > > > > > > Thanks in advance! > > > > > > > > > > Vladimir > > > > > > > > Hi, > > > > > > > > Some USB devices have problems with Clear Stall. FreeBSD usually > > > > clears the stall on the endpoints before starting to use them. Some > > > > devices empty the fifo when receiving this clear stall, and does not > > > > requeue the data. That is why your device most likely does not work. > > > > > > > > --HPS > > > > > > Is there something i could do in order to workaround such a behaviour ? > > > > > > Vladimir _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-usb To unsubscribe, send any mail to "[EMAIL PROTECTED]"
