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.

HISTORY

The xhci device driver first appeared in FreeBSD 8.2.