USB device driver debugging

[Pierre Hébert]

On Thursday 31 January 2008, Jean-Michel Bouffard wrote:
> There is nothing else in "USB Support". I will try "USB Gadget" ->
> "Debugging information files" but I don't think this is what I am
> looking for.

The help for this kernel option is :
---------------
CONFIG_USB_MON:

If you say Y here, a component which captures the USB traffic
between peripheral-specific drivers and HC drivers will be built.
For more information, see <file:Documentation/usb/usbmon.txt>.

This is somewhat experimental at this time, but it should be safe.

If unsure, say Y.

Symbol: USB_MON [=y]
Prompt: USB Monitor
  Defined at drivers/usb/mon/Kconfig:5
  Depends on: HAS_IOMEM && USB
  Location:
    -> Device Drivers
      -> USB support
------------
(located between "Microtek X6USB scanner support" and "USB port drivers")

Isn't it what you are looking for ? Could it be that HAS_IOMEM is 
undefined ?