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+.\" Copyright (c) 2014 Hans Petter Selasky <hselasky at freebsd dot org>.
+.\" 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 February 7, 2014
+.Dt WSP 4
+.Os
+.Sh NAME
+.Nm wsp
+.Nd Wellspring touchpad driver
+.Sh SYNOPSIS
+To compile this driver into the kernel, place the following lines into
+your kernel configuration file:
+.Bd -ragged -offset indent
+.Cd "device wsp"
+.Cd "device usb"
+.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
+wsp_load="YES"
+.Ed
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the Apple Internal Trackpad
+device found in many Apple laptops.
+.Pp
+The driver simulates a three-button mouse using multi-finger tap
+detection.
+A single-finger press generates a left button click. 
+A two-finger tap maps to the right button; whereas a three-finger tap
+gets treated as a middle button click.
+.Pp
+.Nm
+supports dynamic reconfiguration using
+.Xr sysctl 8
+through nodes under
+.Nm hw.usb.wsp .
+Pointer sensitivity can be controlled using the sysctl tunable
+.Nm hw.usb.wsp.scale_factor .
+.Sh FILES
+.Nm
+creates a blocking pseudo-device file,
+.Pa /dev/wsp0 ,
+which presents the mouse as a
+.Em sysmouse
+or
+.Em mousesystems
+type device--see
+.Xr moused 8
+for an explanation of these mouse
+types.
+.Sh SEE ALSO
+.Xr sysmouse 4 ,
+.Xr usb 4 ,
+.Xr loader.conf 5 ,
+.Xr xorg.conf 5 Pq Pa ports/x11/xorg ,
+.Xr moused 8 ,
+.Xr sysctl 8
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Huang Wen Hui Aq huanghwh@gmail.com