[U-Boot] Atmel AT91 USB Device Controller Driver

Hi all,

I would like to use an USB Console with an AT91SAM9260 microcontroller, so I've read that the usb device driver and the serial over usb driver should be enabled:

#define CONFIG_USB_DEVICE #define CONFIG_USB_TTY #define CFG_CONSOLE_IS_IN_ENV

the support for the Serial over USB is already present (/drivers/serial/usbtty.c), but i need the USB Device Controller Driver for the Atmel AT91 family, a sort of /drivers/usb/usbdcore_at91.c...

Before starting to write (or to port from linux) the driver on my own, I ask you if someone has already done this kind of work.

Thanks in advance