XHCI(4)                FreeBSD Kernel Interfaces Manual                XHCI(4)

NAME
     xhci - USB eXtensible Host Controller driver

SYNOPSIS
     device xhci

DESCRIPTION
     The xhci driver provides support for the USB eXtensible Host Controller
     Interface, which allows use of USB 1.0, 2.0 and 3.0 devices on the same
     USB port.

     The XHCI controller supports USB connection speeds up to 5.0Gbps when
     using a USB 3.0 compliant device.

HARDWARE
     The xhci driver supports XHCI compatible controllers having PCI class 12
     (serial bus), subclass 3 (USB) and programming interface 48 (XHCI).

SYSCTL VARIABLES
     The following variables are available as both sysctl(8) variables and
     loader(8) tunables:

     hw.usb.xhci.debug
             Debug output level, where 0 is debugging disabled and larger
             values increase debug message verbosity.  Default is 0.

SEE ALSO
     ehci(4), ohci(4), uhci(4), usb(4)

HISTORY
     The xhci device driver first appeared in FreeBSD 8.2.

FreeBSD 13.1-RELEASE-p6         April 24, 2018         FreeBSD 13.1-RELEASE-p6