How to disable xhci controller on armbian

[Darknight]

Hi all,

 

We have an issue about xhci controller, the armbian on the S905W will throw there are not enough resource controller when using hub usb 3.0 (dmess).

On ubuntu, we can disable xhci by command follow on this topic https://www.systutorials.com/how-to-force-a-usb-3-0-port-to-work-in-usb-2-0-mode-in-linux/

 

lspci -nn | grep USB \
| cut -d '[' -f3 | cut -d ']' -f1 \
| xargs -I@ setpci -H1 -d @ d0.l=0

This command will executed and xhci controller will switched to ehci controller, this function useful for us since ehci controller can be handled a lot of resource.

 

Another solution to disable xhci here: https://askubuntu.com/questions/1198528/blacklist-xhci-hcd

 

The question is: how to switch the xhci controller to ehci controller on the armbian (s905w board)