6733c8990f
MFC after: 3 days
132 lines
4.1 KiB
Groff
132 lines
4.1 KiB
Groff
.\"-
|
|
.\" Copyright (c) 2012 Robert N. M. Watson
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This software was developed by SRI International and the University of
|
|
.\" Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
|
|
.\" ("CTSRD"), as part of the DARPA CRASH research programme.
|
|
.\"
|
|
.\" 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 August 18, 2012
|
|
.Dt TERASIC_MTL 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm terasic_mtl
|
|
.Nd driver for the Terasic/Cambridge Multi-Touch LCD device
|
|
.Sh SYNOPSIS
|
|
.Cd "device terasic_mtl"
|
|
.Pp
|
|
In
|
|
.Pa /boot/device.hints :
|
|
.Cd hint.terasic_mtl.0.at="nexus0"
|
|
.Cd hint.terasic_mtl.0.reg_maddr=0x70400000
|
|
.Cd hint.terasic_mtl.0.reg_msize=0x1000
|
|
.Cd hint.terasic_mtl.0.pixel_maddr=0x70000000
|
|
.Cd hint.terasic_mtl.0.pixel_msize=0x177000
|
|
.Cd hint.terasic_mtl.0.text_maddr=0x70177000
|
|
.Cd hint.terasic_mtl.0.text_msize=0x2000
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
device driver provides support for the Terasic Multi-Touch LCD combined as
|
|
controlled by a University of Cambridge's IP Core.
|
|
Three device nodes are instantiated, representing various services supported
|
|
by the device:
|
|
.Bl -tag -width terasic_pixelX
|
|
.It terasic_regX
|
|
Memory-mapped register interface, including touch screen input.
|
|
.It terasic_pixelX
|
|
Memory-mapped pixel-oriented frame buffer.
|
|
.It terasic_textX
|
|
Memory-mapped text-oriented frame buffer.
|
|
.El
|
|
.Pp
|
|
.Nm
|
|
devices are also attached to the
|
|
.Xr syscons 4
|
|
framework, which implements a VT-compatible terminal connected to the
|
|
.Xr tty 4
|
|
framework.
|
|
.Li ttyvX
|
|
device nodes may be added to
|
|
.Xr ttys 5
|
|
in order to launch
|
|
.Xr login 1
|
|
sessions at boot.
|
|
.Pp
|
|
Register, text, and pixel devices may be accessed using
|
|
.Xr read 2
|
|
and
|
|
.Xr write 2
|
|
system calls, and also memory mapped using
|
|
.Xr mmap 2 .
|
|
.Sh SEE ALSO
|
|
.Xr login 1 ,
|
|
.Xr ioctl 2 ,
|
|
.Xr mmap 2 ,
|
|
.Xr poll 2 ,
|
|
.Xr read 2 ,
|
|
.Xr write 2 ,
|
|
.Xr syscons 4 ,
|
|
.Xr tty 4 ,
|
|
.Xr ttys 5
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
device driver first appeared in
|
|
.Fx 10.0 .
|
|
.Sh AUTHORS
|
|
The
|
|
.Nm
|
|
device driver and this manual page were
|
|
developed by SRI International and the University of Cambridge Computer
|
|
Laboratory under DARPA/AFRL contract
|
|
.Pq FA8750-10-C-0237
|
|
.Pq Do CTSRD Dc ,
|
|
as part of the DARPA CRASH research programme.
|
|
This device driver was written by
|
|
.An Robert N. M. Watson .
|
|
.Sh BUGS
|
|
The
|
|
.Xr syscons 4
|
|
attachment does not support the hardware cursor feature.
|
|
.Pp
|
|
A more structured interface to control registers using the
|
|
.Xr ioctl 2
|
|
system call, would sometimes be preferable to memory mapping.
|
|
For touch screen input, it would be highly desirable to offer a streaming
|
|
interface whose events can be managed using
|
|
.Xr poll 2
|
|
and related system calls, with the kernel performing polling rather than the
|
|
userspace application.
|
|
.Pp
|
|
.Nm
|
|
supports only a
|
|
.Li nexus
|
|
bus attachment, which is appropriate for system-on-chip busses such as
|
|
Altera's Avalon bus.
|
|
If the IP core is configured off of another bus type, then additional bus
|
|
attachments will be required.
|