73 lines
2.3 KiB
Groff
73 lines
2.3 KiB
Groff
.\" Copyright (c) 2002 John Hay.
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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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.\" $FreeBSD$
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.\"
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.Dd February 7, 2002
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.Dt PUC 4
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.Os
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.Sh NAME
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.Nm puc
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.Nd PCI
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.Dq Universal
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Communications driver
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.Sh SYNOPSIS
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.Cd "device pci"
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.Cd "device puc"
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.Cd "device sio"
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.Cd "options PUC_FASTINTR"
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.Sh DESCRIPTION
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This driver acts as a shim to connect PCI serial ports to the
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.Xr sio 4
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driver.
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.Pp
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The list of supported devices is in
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.Pa sys/dev/puc/pucdata.c .
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Support for new cards should be added there.
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.Pp
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If the
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.Dv PUC_FASTINTR
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option is used, the driver will try to use fast interrupts.
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This should lower the interrupt latency and should be used if the
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.Xr sio 4
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driver reports
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.Sy "silo overflow"
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errors.
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It cannot be used if the interrupt is shared.
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.Sh SEE ALSO
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.Xr sio 4
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.Sh HISTORY
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This driver took the idea from the
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.Nx
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.Xr puc 4
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driver and still uses the same structure to describe cards, to ease exchanging
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card info.
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.Sh BUGS
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Only serial ports are supported through the
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.Xr sio 4
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driver at the moment.
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Someone should write support for parallel ports using the
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.Xr lpt 4
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driver.
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