USB設備驅動整體結構

http://book.51cto.com/art/200811/96174.htm

linux usb 詳解

http://book.51cto.com/art/200811/96183.htm

USB 講座

http://chamberplus.myweb.hinet.net/usb_diy1.htm

ehci sample code for NetBSD

http://orange.kame.net/dev/cvsweb.cgi/kame/netbsd/sys/dev/usb/ehci.c?rev=1.1.1.2

window usb struct

http://www.eetop.cn/blog/html/97/24597-1390.html
http://www.eetop.cn/blog/html/97/24597-1391.html
http://www.eetop.cn/blog/html/97/24597-1392.html

FreeBSD ehci source code

http://fxr.watson.org/fxr/source/pc/usbehci.c?v=PLAN9

The USB DOC

http://www.lrr.in.tum.de/Par/arch/usb/usbdoc/node4.html