I would like to share my very basic usb driver that i had been working on.. i didnt got much time to complete it.. this driver supports my SAMSUNG S3310 usb mass storage device.. the driver dosent do much, it just detects when the device is attached and/or removed..
if anyone wants to continue working on it would be great for learning purposes..
most of my code is simple to understand i put a lot of comments along with the code..
Comments, Suggestions, criticism are always welcome.
If you dont find the link click on gotemp.
The next step could be data transfer using urb. 
CLICK ON GOTEMP .. that’s the link to the driver if you dont get it!!