Re: Still cant talk to USD ports

[Todd Gruhn <tgruhn2%gmail.com@localhost>]

Has anyone done this? Is there a way to do this in any form with NetBSD
(in the kernel?) .

On Tue, Jul 20, 2021 at 1:44 AM Michael van Elst <mlelstv%serpens.de@localhost> wrote:
>
> tgruhn2%gmail.com@localhost (Todd Gruhn) writes:
>
> >Is it possible to tell the system to access port-x as a USB-3 or USB-2  port ?
>
> You could probably add a feature to disable USB-3 functionality for a port.
>
> On older systems the xhci controller only supports USB-3 and the USB-2 functionality
> is provided by a separate ehci controller. Shouldn't be difficult to disable USB-3
> there.
>
> On newer systems the xhci controller learned to talk USB-2 as well. I'm not sure
> if you can disable USB-3 there without disabling USB-2 at the same time.
>