Hi Krishna,
I am currently developing a USB DFU feature for at91sam9263 board. I have to develop the driver for USB device port. I looked the uboot-usb git cdc branch it has a at91_udc.c driver it doesnt contain the udc_* api implementations. I found a earlier post where it was discussed. http://www.mail-archive.com/u-boot@lists.denx.de/msg08709.html Can any point give me a pointer to implement it or the implementations if exist.
I'm currently busy posting the patches for DFU for the Atmel SAM9G45 and I hope to finish that by the end of today. I think it will be 3 patches in total. One for the Atmel_usba_udc, one for DFU and one to add my board which can be used as an example than.
Perhaps those will be helpful to you.
Best regards, Marcel