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
HISTORY
The xhci device driver first appeared in
FreeBSD 8.2.