On Tue, Jan 17, 2012 at 07:26:24PM +0530, Praveen kumar wrote:

Hi Greg,

What type of diagnostics are you trying to do?
?????????? I am trying to is to make communication to all the chips present on
board (from kernel) and make sure all the input/output lines are working on
that chip and the status of the configuration.
As I am doing with the other chips like video controller ,audio controller etc
,I want to make sure the working condition of the USB controller and some tests
to prove input and output lines are working and if possible loop back data
test.

Good luck with that, it might be hard to do from within the kernel :)

How can it not be configured correctly?

I am not sure in which condition the configuration of controller may fail but
just I want to make sure the controller is configured properly.

You have looked at the debugfs files for the usb controllers for this
type of thing already, right?

I have seen debugfs where I can dump all the configuration reg values ,but not
sure to see which reg values to confirm? controller is configured properly.

Also I was trying to get the linux-usb project (http://sourceforge.net/apps/
trac/sourceforge/wiki/Git) through git to make use of some code in there for
some of the tests but I am not able to get it.
Is there any alternative link from where I can get the code (like lsusb.c etc
)..

usbutils are on github, look in your distro for the location of the
source.

greg k-h