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+.\" $NetBSD: uchcom.4,v 1.2 2008/04/30 13:10:54 martin Exp $
+.\"
+.\" Copyright (c) 2007 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by Takuya SHIOZAKI (tshiozak@netbsd.org).
+.\"
+.\" 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd November 20, 2011
+.Dt UCHCOM 4
+.Os
+.Sh NAME
+.Nm uchcom
+.Nd WinChipHead CH341/CH340 serial adapter driver
+.Sh SYNOPSIS
+To compile this driver into the kernel,
+place the following lines in your
+kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device usb"
+.Cd "device ucom"
+.Cd "device uchcom"
+.Ed
+.Pp
+Alternatively, to load the driver as a
+module at boot time, place the following line in
+.Xr loader.conf 5 :
+.Bd -literal -offset indent
+uchcom_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the WinChipHead CH341/CH340 USB-to-RS-232
+Bridge chip.
+.Pp
+The device is accessed through the
+.Xr ucom 4
+driver which makes it behave like a
+.Xr tty 4 .
+.Sh HARDWARE
+The
+.Nm
+driver supports the following adapters:
+.Pp
+.Bl -bullet -compact
+.It
+HL USB-RS232
+.El
+.Sh SEE ALSO
+.Xr tty 4 ,
+.Xr ucom 4 ,
+.Xr usb 4
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Nx .
+The first
+.Fx
+release to include it was
+.Fx 8.0 .
+.Sh BUGS
+Actually, this chip seems unable to drive other than 8 data bits and
+1 stop bit line.