http://u-boot.10912.n7.nabble.com/U-Boot-patch-0-3-Improve-stability-USB-memory-sticks-for-the-common-OHCI-USB-layer-tc45868.html#none

OHCI HCD (Host Controller Driver) for USB.

本文主要介绍了USB协议的基础知识，包括USB协议的来龙去脉，OHCI/UHCI/EHCI/xHCI之间的区别和联 系，USB的firmware，以及USB 2.0协议的概览，USB的枚举的详细过程，OHCI的一些特点(This article mainly introduces the basic knowledge of USB protocol, including the ins and outs of the USB protocol, the difference and conn