On 2021/2/27 11:38, liulongfang wrote: > On 2021/2/27 0:30, Alan Stern wrote: >> On Fri, Feb 26, 2021 at 04:21:37PM +0800, Longfang Liu wrote: >>> Our current XHCI hardware controller has been customized to only >>> support USB 2.0 ports. When using the current xhci driver, an xhci >>> controller device and an ehci controller device will be created >>> automatically. >> >> That sentence makes no sense at all. An EHCI controller device is a >> piece of hardware. How can an xHCI driver, which is a piece of >> software, create a piece of hardware? >> >> Alan Stern >> . >> > The hardware device is a complete USB3.0 controller, On the hardware, only the hardware connection of the USB2.0 port has been opened > but I hope to support a USB2.0-only mode through software configuration. > Thanks. > Longfang Liu > . > Thanks. Longfang Liu
