Is FreeBSD-current XHCI 1.1 compliant?

Rajesh Kumar rajfbsd at
Thu Aug 9 08:42:27 UTC 2018

Ok Hans, I don't have any XHCI 1.1 device at this point. I raised the
question in general to know the state in FreeBSD.  If I come across any
inputs, I will definitely update the group.


On Thu, Aug 9, 2018 at 1:59 PM Hans Petter Selasky <hps at> wrote:

> On 08/09/18 10:25, Rajesh Kumar wrote:
> > No, I am not aware of any changes to be done specifically. But just
> wanted
> > to know whether the -CURRENT code is compliant to the latest standard.
> >
> > What I understand is, with XHCI 1.1, USB 3.1 is supported with speed of
> > upto 10Gbps. But freebsd xhci manpage says, it supports upto USB 3.0 with
> > speed upto 5Gbps. So, just wondering whether anything done in FreeBSD
> with
> > respect to XHCI 1.1 (or) any plans for the same?
> >
> > Anyway, Thanks for the quick turn-around.
> Hi,
> The FreeBSD XHCI driver does not use the speed information provided by
> the XHCI PCI descriptors currently nor any internal registers. Even if
> the device is 10Gbps capable it will be listed as 5Gbps. If you have an
> XHCI 1.1 device and the FreeBSD XHCI driver works, we might want to
> update the manual page.
> --HPS

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