Date: Fri, 7 Mar 2008 18:55:46 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: Vladimir Terziev <vlady@gbservices.biz> Cc: freebsd-usb@freebsd.org Subject: Re: USB Smart card reader/writer problem Message-ID: <200803071855.47520.hselasky@c2i.net> In-Reply-To: <20080307103546.799d3e0d.vlady@gbservices.biz> References: <20080306183641.c941b83a.vlady@gbservices.biz> <200803061807.46113.hselasky@c2i.net> <20080307103546.799d3e0d.vlady@gbservices.biz>
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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 <hselasky@c2i.net> 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
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