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+.\" $OpenBSD: xhci.4,v 1.4 2021/12/29 18:44:52 patrick Exp $
+.\"
+.\" Copyright (c) 2014 Martin Pieuchot
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.Dd $Mdocdate: December 29 2021 $
+.Dt XHCI 4
+.Os
+.Sh NAME
+.Nm xhci
+.Nd USB eXtensible Host Controller Interface
+.Sh SYNOPSIS
+.Cd "xhci* at acpi?"
+.Cd "xhci* at fdt?"
+.Cd "xhci* at pci?"
+.Cd "usb* at xhci?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the USB eXtensible Host Controller Interface,
+which provides an interface to
+.Xr usb 4
+devices.
+.Pp
+xHCI controllers support all USB 3.0, 2.0 and 1.x device speeds.
+.Sh SEE ALSO
+.Xr acpi 4 ,
+.Xr pci 4 ,
+.Xr usb 4
+.Sh HISTORY
+The
+.Nm
+driver
+appeared in
+.Ox 5.6 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Martin Pieuchot Aq Mt mpi@openbsd.org .