> Someone can give me a starting guide to porting driver or an a introduccion > to build a hello world usb driver??
Check out the Writing Device Drivers book: http://docs.sun.com/app/docs/doc/816-4854 It has a chapter on USB drivers, but you'll also need the overall Solaris driver knowledge, so the proper way to learn is to read the entire book and only skip chapters for the types of devices you don't need (e.g. SCSI). -Artem