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+.\"     $NetBSD: tcu.4,v 1.2 2016/08/18 19:22:45 wiz Exp $
+.\"
+.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Gregory McGarry.
+.\"
+.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+.\"
+.Dd August 9, 2016
+.Dt TCU 4
+.Os
+.Sh NAME
+.Nm tcu
+.Nd TURBOchannel USB host options
+.Sh SYNOPSIS
+.Cd "tcu*    at tc? slot ? offset ?"
+.Pp
+.Cd "slhci*  at tcu?"
+.Cd "usb*    at slhci?"
+.Pp
+.Cd "gpio*   at gpiobus?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the flxd TC-USB TURBOchannel USB host options based
+upon a Cypress SL811HST USB 1.1 host controller and a glue logic CPLD.
+USB is handled by the
+.Xr slhci 4
+driver.
+Eight GPIO pins provided by the CPLD can be accessed through the
+.Xr gpio 4
+driver.
+.Sh SEE ALSO
+.Xr gpio 4 ,
+.Xr slhci 4 ,
+.Xr tc 4 ,
+.Xr usb 4