USB Smart card reader/writer problem

[Vladimir Terziev]

	I think, that's the real problem, since i made the change, proposed by you, in the kernel code, but this didn't help the device to start interoperate with the OS.

	Thanks for your time!

		Vladimir


On Mon, 10 Mar 2008 17:48:48 +0100
Hans Petter Selasky <hselasky at c2i.net> wrote:

> 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 <hselasky at c2i.net> 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 <hselasky at 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
> 
>