Add Magma SBus serial/parallel port manual page by Iain Hibbert.
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# $NetBSD: Makefile,v 1.11 1998/01/10 23:06:38 mikel Exp $
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# $NetBSD: Makefile,v 1.12 1998/05/20 00:10:40 pk Exp $
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# from: @(#)Makefile 8.2 (Berkeley) 2/16/94
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MAN= bwtwo.4 cgeight.4 cgfour.4 cgsix.4 cgthree.4 cgtwo.4 \
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fd.4 intro.4 kbd.4 le.4 mem.4 ms.4 openprom.4 tcx.4 cgfourteen.4
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MAN= bwtwo.4 cgeight.4 cgfour.4 cgfourteen.4 cgsix.4 cgthree.4 cgtwo.4 \
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fd.4 intro.4 kbd.4 le.4 magma.4 mem.4 ms.4 openprom.4 tcx.4
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MLINKS+=mem.4 kmem.4
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MLINKS+=fd.4 fdc.4
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MANSUBDIR=/sparc
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111
share/man/man4/man4.sparc/magma.4
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111
share/man/man4/man4.sparc/magma.4
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.\"
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.\" Copyright (c) 1998 Iain Hibbert
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.\" All rights reserved.
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Iain Hibbert
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd 21 April, 1998
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.Dt MAGMA 4 sparc
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.Sh NAME
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.Nm magma
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.Nd
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Magma Sp Serial/Parallel board device driver
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.Sh SYNOPSIS
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.Cd "magma? at sbus? slot ? offset ?"
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.Cd "mtty? at magma?"
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.Cd "mbpp? at magma?"
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.Sh DESCRIPTION
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This driver provides an interface to Magma LC2+1Sp, 2+1Sp, 4+1Sp, 8+2Sp,
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4Sp, 8Sp, 12Sp, 16Sp, 1P and 2P boards. These boards are based around
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the Cirrus Logic CD1400 serial/parallel communications engine and the
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Cirrus Logic CD1190 parallel communications engine.
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.Pp
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The device minor numbers for this driver are encoded as follows:
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.Pp
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.Bd -literal
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+---+---+---+---+---+---+---+---+
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| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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+---+---+---+---+---+---+---+---+
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| | | | | | | |
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| | | | +---+---+---+---> port number
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| | | |
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| | | +-------------------> dialout (on tty ports)
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| | |
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| | +-----------------------> unused
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| |
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+---+---------------------------> card number
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.Ed
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.Pp
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Up to four cards are supported in the system.
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.Pp
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All tty ports have full automatic hardware (RTS/CTS) flow control available
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and a 12 byte FIFO on the chip in each direction so errors should be minimal.
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.Sh DIAGNOSTICS
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.Bl -diag
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.It "mtty%d%x: ring buffer overflow"
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Incoming characters have been discarded due to a buffer overflow. This is
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caused by the process in control of the device not reading characters
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fast enough. If need be you can make the ring buffer bigger by changing the
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\fIMAGMA_RBUF_SIZE\fR #define to something bigger, but it should be a multiple
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of two.
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.It "mtty%d%x: fifo overflow"
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Incoming characters have been discarded due to a CD1400 channel overrun. This
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is caused by interrupts not being serviced sufficiently quickly to prevent
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the 12 byte receive FIFO on a serial channel from overflowing. Reducing
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the value of either the \fIMTTY_RX_FIFO_THRESHOLD\fR or \fIMTTY_RX_DTR_THRESHOLD\fR
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#define's to something smaller may help slow machines avoid this problem.
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.El
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.Sh FILES
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.Bl -tag -width /dev/bpp[0-3][0-1] -compact
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.It /dev/tty[0-3][0-a]
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Serial ports
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.It /dev/bpp[0-3][0-1]
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Parallel ports
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.El
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.Sh SEE ALSO
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.Xr read 2 ,
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.Xr termios 4 ,
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.Xr tty 4
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.Sh AUTHORS
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The driver was written by Iain Hibbert <plunky@skate.demon.co.uk>
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.Sh HISTORY
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The driver was loosely based upon the
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.Xr cy 4
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Cyclades Cyclom device driver written
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by Andrew Herbert and Timo Rossi.
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.Sh TODO
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CD1190 parallel support
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.Pp
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bpp input
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.Pp
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Dialout (cua) devices are not yet supported.
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.Pp
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mdmbuf is unsupported
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.Pp
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automatic XON/XOFF handshaking could be implemented fairly easily.
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.Pp
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it would be good if the tty port waited for the FIFO to empty before allowing
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a close, so that I could turn off the channel interrupts at that time. It can
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be done.
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