I thought about a tutorial or a step-by-step but EHCI controllers vary widely by platform, and going with the "least common denominator" means doing it for x86.

I thought about a tutorial or a step-by-step but EHCI controllers vary widely by platform, and going with the "least common denominator" means doing it for x86... I could never convince myself it was worth a blog post. Maybe if the RPi becomes a favorite for OS development, I might do it. You could always poke around on http://osdev.org http://osdev.org and see if you find some useful stuff there. :)