Re: [Discuss-gnuradio] usrper fails in usb_claim_interface

[Eric Blossom]

On Tue, Apr 05, 2005 at 12:03:00PM -0700, Larry Doolittle wrote:
> Hi -
> 
> I have an Avnet Virtex 4 evaluation board, intended for
> projects similar in concept to GNU Radio.  It uses the
> same CY7C68013 chip as USRP.
> 
> I used USRP as a software reference design, and started
> splicing in some code of my own.  I think that part is
> in good shape, after coming up to speed on SDCC etc.
> 
> When I go to download my .ihx file, usrper says:
> 
> # usrper -x load_firmware ${FOO}/usrp_main.ihx
> lt-usrper: found unconfigured FX2; needs firmware.
> usrp_open_interface:usb_claim_interface: failed interface 0
> could not claim interface 0: Device or resource busy
> lt-usrper: failed to open_cmd_interface
> # 
> 
> I am running this as root, to avoid possible permissions
> problems.  The Linux kernel is 2.6.10-9-amd64-k8, base
> distribution is debian sid.

I suspect that you may have the usbtest module loaded.
If so it grab the FX2 interface.

Try this:

# lsmod
# rmmod usbtest

> The curious thing is that both fxload and fx2_programmer
> seem to work; with fxload, I have even confirmed (by watching
> I/O pins with a scope) that my .ihx file loads and runs.

Not sure about those...

> strace shows a non-surprising:
> 
> open("/proc/bus/usb/005/005", O_RDWR)   = 3
> ioctl(3, USBDEVFS_SETCONFIGURATION, 0x7fbffffb2c) = 0
> ioctl(3, USBDEVFS_CLAIMINTERFACE, 0x7fbffffb2c) = -1 EBUSY (Device or 
> resource busy)
> write(2, 
> "usrp_open_interface:usb_claim_in"...,60usrp_open_interface:usb_claim_interface:
>  failed interface 0
> ) = 60
> 
> I found http://comsec.com/wiki?UsrpInstall, where this message
> is listed, and it says to use USB 2.0 instead of USB 1.1.
> If I read my kernel logs correctly, I _do_ have USB 2.0 active:
> 
> 2005-04-05 11:20:16.200324500 <6>usb 5-1: new high speed USB device using 
> ehci_hcd and address 6
> 2005-04-05 11:20:16.264596500 <6>usbtest 5-1:1.0: FX2 device
> 2005-04-05 11:20:16.264640500 <6>usbtest 5-1:1.0: high speed {control bulk-in 
> bulk-out} tests (+alt)
----------------------------------^^^^^^^

You have the usbtest module loaded.
rmmod it.

> 2005-04-05 11:20:45.881313500 <4>usb 5-1: usbfs: interface 0 claimed while 
> 'lt-usrper' sets config #1
> 2005-04-05 11:35:07.626327500 <4>usb 5-1: usbfs: interface 0 claimed while 
> 'lt-usrper' sets config #1
> 
> Anybody have a clue they can share with me?
> 
>     - Larry

Eric