125 lines
3.1 KiB
Groff
125 lines
3.1 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 June 21, 2004
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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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.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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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 multiplexor 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 Cirrus Logic CL-CD180 driver.
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.Sh ERRORS
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The following driver specific error messages
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may be reported:
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.Bl -tag -width Er
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.It Bq Er EBUSY
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May be returned if the device was busy when a
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request to access its resources was made by
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.Nm
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and was denied.
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.It Bq Er ENOMEM
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May be returned if the
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.Nm
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driver was unable to obtain the
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.Tn IOBASE
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addresses.
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.It Bq Er ENXIO
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May be returned if the device cannot obtain a valid
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.Tn IO
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port through
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.Fn isa_get_port .
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This error may also be returned if the
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.Fn isa_get_irq
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function cannot obtain a valid
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.Tn IRQ .
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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 sio 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 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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.Fn splx
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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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