1.\" Copyright (c) 2002 John Hay. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.\" $FreeBSD: src/share/man/man4/puc.4,v 1.1.2.1 2002/03/07 17:48:38 jhay Exp $ 26.\" $DragonFly: src/share/man/man4/puc.4,v 1.4 2007/04/09 21:20:37 swildner Exp $ 27.\" 28.Dd February 7, 2002 29.Dt PUC 4 30.Os 31.Sh NAME 32.Nm puc 33.Nd PCI ``Universal'' Communications driver 34.Sh SYNOPSIS 35.Cd device pci 36.Cd device puc 37.Cd device sio 38.Cd options PUC_FASTINTR 39.Sh DESCRIPTION 40This driver acts as a shim to connect pci serial ports to the 41.Xr sio 4 42driver. 43.Pp 44The list of supported devices is in 45.Em src/sys/dev/puc/pucdata.c . 46Support for new cards should be added there. 47.Pp 48If the PUC_FASTINTR option is used the driver will try to use fast interrupts. 49This should lower the interrupt latency and should be used if the 50.Xr sio 4 51driver reports 52.Em silo overflow 53errors. 54It cannot be used if the interrupt is shared. 55.Sh SEE ALSO 56.Xr sio 4 57.Sh HISTORY 58This driver took the idea from the 59.Nx 60.Xr puc 4 61driver and still use the same structure to describe cards to ease exchanging 62card info. 63.Sh BUGS 64Only serial ports are supported through the 65.Xr sio 4 66driver at the moment. 67Someone should write support for parallel ports using the 68.Xr lpt 4 69driver. 70