80 lines
2.3 KiB
Groff
80 lines
2.3 KiB
Groff
.\"
|
|
.\" Copyright (c) 2011 Hans Petter Selasky. All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd April 24, 2018
|
|
.Dt XHCI 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm xhci
|
|
.Nd USB eXtensible Host Controller driver
|
|
.Sh SYNOPSIS
|
|
.Cd "device xhci"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver provides support for the
|
|
.Tn USB
|
|
eXtensible Host Controller Interface,
|
|
which allows use of
|
|
.Tn USB
|
|
1.0, 2.0 and 3.0 devices on the same
|
|
.Tn USB
|
|
port.
|
|
.Pp
|
|
The
|
|
.Tn XHCI
|
|
controller supports
|
|
.Tn USB
|
|
connection speeds up to 5.0Gbps when using a USB 3.0 compliant device.
|
|
.Sh HARDWARE
|
|
The
|
|
.Nm
|
|
driver supports
|
|
.Tn XHCI
|
|
compatible controllers having PCI class 12 (serial bus),
|
|
subclass 3 (USB) and programming interface 48 (XHCI).
|
|
.Sh SYSCTL VARIABLES
|
|
The following variables are available as both
|
|
.Xr sysctl 8
|
|
variables and
|
|
.Xr loader 8
|
|
tunables:
|
|
.Bl -tag -width indent
|
|
.It Va hw.usb.xhci.debug
|
|
Debug output level, where 0 is debugging disabled and larger values increase
|
|
debug message verbosity.
|
|
Default is 0.
|
|
.Sh SEE ALSO
|
|
.Xr ehci 4 ,
|
|
.Xr ohci 4 ,
|
|
.Xr uhci 4 ,
|
|
.Xr usb 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device driver first appeared in
|
|
.Fx 8.2 .
|