Re: Olimex ARM-USB-OCD and ftdi-sio driver

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On Tue, Mar 03, 2009 at 12:06:10AM -0500, Jon Smirl wrote:
> I have an Olimex ARM-USB-OCD which I haven't used in a while. I just
> got it out and tried using it on 2.6.28. I can't get the serial port
> and JTAG to work simultaneously. It appears to me that ftdi-sio is
> interfering with the user space jtag program. I get this in the log
> file when I use the user space program.
> 
> usb 7-2: usbfs: interface 1 claimed by ftdi_sio while 'jtag' sets config #1
> 
> If I unload ftdi-sio I can use the device.
> 
> 7-2:1.0 says its driver is usbfs
> 7-2:1.1 says its driver is ftdi_sio
> 
> I tried echo -n 7-2:1.0 >unbind on usbfs but it didn't help.

You need to unbind the ftdi_sio driver and then use the jtag userspace
program.

That program should be the one doing the unbinding, there's a usbfs
ioctl to do just that.

hope this helps,

greg k-h
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