125 lines
3.3 KiB
Groff
125 lines
3.3 KiB
Groff
.\"
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.\" Copyright (c) 2004 Tom Rhodes
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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 March 18, 2005
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.Dt RC 4
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.Os
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.Sh NAME
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.Nm rc
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.Nd RISCom/8 multiport card
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.Sh SYNOPSIS
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.Cd device isa
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.Cd device rc
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.Sh DESCRIPTION
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The
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.Tn RISCom/8
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is an eight port
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.Tn ISA
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.Tn RS-232C
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communications multiplexer with a built in
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.Tn RISC
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processor.
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It uses a block of sixteen
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.Tn I/O
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ports in the range 0x200 to 0x3f0 selectable by on-board
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switches or jumpers.
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The block must be aligned on a sixteen port boundary.
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The jumper-selectable hardware interrupt level may be set to
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be detected during system
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initialization using settings found in the
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.Pa /boot/device.hints
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file.
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.Pp
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This driver is mostly based on the Cirrus Logic CL-CD180 driver.
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.Sh HARDWARE
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The
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.Nm
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driver provides support for the
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.Tn SDL
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Communications
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.Tn RISCom/8
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boards.
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.Sh DIAGNOSTICS
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The following driver specific error messages
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may be reported:
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.Bl -diag
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.It "rc%d channel%d: interrupt-level buffer overflow"
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An internal buffer overflow error has occurred on
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the listed channel.
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The
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.Nm
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driver will need to be reloaded to correct this.
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.It "rc%d: Bad char chan %d"
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The channel has obtained a bad set of characters.
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.It "rc%d: Got extra chars chan %d"
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The
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.Nm
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driver got more characters than expected on the channel shown.
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.It "rc%d: data mismatch chan %d ptr %d (%d != %d)"
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Data sent from channel
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.Ar %d
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to the rx buffer was different then expected.
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.It "rc%d: channel %d command timeout, rc.c line: %d"
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A command timeout has occurred on the channel, the
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.Pa src/sys/dev/rc/rc.c
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file can be consulted for more information.
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.El
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.Sh SEE ALSO
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.Xr tty 1 ,
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.Xr ttyname 3 ,
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.Xr tty 4 ,
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.Xr device.hints 5 ,
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.Xr comcontrol 8 ,
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.Xr getty 8 ,
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.Xr mutex 9 ,
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.Xr splx 9
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.Pp
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.Pa http://www.sdlcomm.com
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 2.0.5 .
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This manual page first appeared in
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.Fx 5.3 .
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.Sh AUTHORS
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This manual page was written by
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.An Tom Rhodes Aq Mt trhodes@FreeBSD.org .
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.Sh BUGS
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The
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.Nm
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driver code still uses the
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.Xr spl 9
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functions.
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These should be replaced by
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.Xr mutex 9
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functions.
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.Pp
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The various
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.Fn ttyld_*
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functions should be documented.
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