116 lines
3.7 KiB
Groff
116 lines
3.7 KiB
Groff
.\" $NetBSD: atppc.4,v 1.16 2018/08/31 19:36:28 sevan Exp $
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.\"
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.\" Copyright (c) 1998, 1999, Nicolas Souchu
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.\" Copyright (c) 2003, 2004 Gary Thorpe <gathorpe@users.sourceforge.net>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd August 31, 2018
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.Dt ATPPC 4
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.Os
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.Sh NAME
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.Nm atppc
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.Nd driver for AT-style parallel port chip sets
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.Sh SYNOPSIS
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.Cd "atppc* at acpi?"
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.Cd "atppc* at isa? port 0x378 irq 7 drq 3 flags 0x00"
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.Cd "atppc* at isapnp?"
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.Cd "atppc* at ofisa?"
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.Cd "atppc* at pnpbios? index ?"
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.Cd "atppc* at puc? port ?"
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.Cd options ATPPC_VERBOSE
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.Cd options ATPPC_DEBUG
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.Sh DESCRIPTION
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.Nm
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supports parallel ports and provides the low level support needed
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by higher level drivers such as
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.Xr ppbus 4 .
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This driver attaches where the traditional
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.Nx
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.Xr lpt 4
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driver would ordinarily.
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It provides the data transport and chip set manipulation needed by
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higher driver layers, such as
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.Xr ppbus 4
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and
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.Xr lpt 4 .
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This driver is designed to be one of many possible implementations
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supporting machine independent parallel device support via
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.Xr ppbus 4 .
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.Ss IEEE 1284 support
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.Nm
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is intended to provide to data-link like services to higher level
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IEEE 1284 device drivers (such as
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.Xr ppbus 4 ) .
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.Nm
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does not directly support IEEE 1284 features such as mode negotiation
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but rather provides the necessary infrastructure to allow a higher
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level driver to provide these services.
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.Pp
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.Nm
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does provide chip set manipulation, device handshakes (where
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appropriate), low-level error detection, and data transfer.
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.Ss Supported data transfer modes
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.Nm
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supports the following data transfer modes: Centronics Compatible
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(Standard), Nibble, Byte (PS2), Fast Centronics, ECP, and EPP.
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Standard and Fast Centronics modes are write only, Nibble and Byte
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modes are read only, and ECP and EPP modes are bidirectional.
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.\" .Sh FILES
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.\" .Sh EXAMPLES
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.Sh SEE ALSO
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.Xr acpi 4 ,
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.Xr i386/pnpbios 4 ,
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.Xr isa 4 ,
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.Xr isapnp 4 ,
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.Xr lpt 4 ,
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.Xr ofisa 4 ,
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.Xr ppbus 4 ,
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.Xr puc 4
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.Sh HISTORY
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The
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.Nm
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driver is based on the
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.Nm ppc
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driver, which originally appeared in
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.Fx .
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The driver was ported over in
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.Nx 2.0 .
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.Sh AUTHORS
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This manual page is based on the
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.Fx
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.Nm ppc
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manual page.
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The information has been updated for the
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.Nx
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port by
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.An "Gary Thorpe" .
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.Sh BUGS
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The
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.Fx
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driver includes support for some specific chip sets, specifically
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detection of some non-standard device I/O locations on the ISA bus.
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This support was not ported over to the
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.Nx
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version of the driver yet.
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