1.\" $NetBSD: clmpcc.4,v 1.3 2002/01/15 01:49:30 wiz Exp $ 2.\" 3.\" Copyright (c) 1999 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Steve C. Woodford. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35.\" POSSIBILITY OF SUCH DAMAGE. 36.\" 37.Dd November 28, 1999 38.Dt CLMPCC 4 mvme68k 39.Os 40.Sh NAME 41.Nm clmpcc 42.Nd Cirrus Logic CD2400/CD2401 serial communications controller 43.Sh SYNOPSIS 44.Cd "clmpcc0 at pcctwo? ipl 4" 45.Sh DESCRIPTION 46The 47.Nm 48driver provides support for the Cirrus Logic CD2401 Multi-protocol 49Communications Controller found on Motorola MVME167 and MVME177 50single-board computers. 51.Pp 52The chip integrates four serial channels in one package, 53with each channel being completely independent and capable of 54running in Async (with optional DMA control), Bisync, HDLC/SDLC and 55X.21 modes. Each channel has 32 bytes of FIFO, split into 16 bytes 56for the Tx side and 16 bytes for the Rx side. 57.Pp 58At the present time, the 59.Nm 60driver supports the non-DMA Async mode of operation, utilising the 61channel FIFOs to maximize throughput with minimal interrupt overhead. 62.Pp 63The Motorola MVME1x7 boards provide a 20MHz master clock to the device, 64which allows the Tx and Rx side to be independently set to any 65baud rate in the range 50 to 57600. 66The device should be capable of running at 67a baud rate of 115200, however it is not a rate documented in the 68device's datasheet for Async. mode so is not recommended. 69.Sh FILES 70.Bl -tag -width Pa 71.It Pa /dev/console 72.It Pa /dev/ttyC1 73.It Pa /dev/ttyC2 74.It Pa /dev/ttyC3 75.El 76.Sh DIAGNOSTICS 77.Bl -diag 78.It clmpcc%d: channel %d command timeout (idle) 79The chip failed to acknowledge a command sent to the specified 80channel. 81.It clmpcc%d: Failed to reset chip 82The 83.Nm 84driver was unable to determine if the chip completed 85it's RESET processing. 86.El 87.Sh SEE ALSO 88.Xr pcctwo 4 , 89.Xr tty 4 90.Sh HISTORY 91The 92.Nm 93driver first appeared in 94.Nx 1.4 95and is 96.Ud 97.Sh BUGS 98The hardware flow control features of the chip are not yet fully 99supported. 100