在这里我看到的信息. http://linux-sunxi.org/A10/USB
USB OTG
All Allwinner A-series SoCs come with one USB OTG controller. The controller has been identified as a Mentor Graphics Inventra HDRC (High-speed Dual Role Controller), which is supported by the "musb" driver. However, the register addresses are scrambled.
The A20 manual lists the following features
Complies with USB 2.0 specification
Supports high-speed, full-speed, and low-speed in host mode
Supports high-speed and full-speed in device mode
64 byte endpoint 0 for control transfer
Supports up to 5 user configurable endpoints for bulk, isochronous, control, and interrupt bi-directional transfers
The USB OTG controller is connected to a port controller. Only the data pins are exported from the SoC. The port controller is also used to control or tune the USB PHYs for the other USB host controllers.
我的debian怎么连上usb线就说是 Full speed的呢? 是我哪儿整差了? |