1.\" $NetBSD: clmpcc.4,v 1.2 1999/12/15 23:44:53 abs 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.Pp 46.Sh DESCRIPTION 47The 48.Nm 49driver provides support for the Cirrus Logic CD2401 Multi-protocol 50Communications Controller found on Motorola MVME167 and MVME177 51single-board computers. 52.Pp 53The chip integrates four serial channels in one package, 54with each channel being completely independent and capable of 55running in Async (with optional DMA control), Bisync, HDLC/SDLC and 56X.21 modes. Each channel has 32 bytes of FIFO, split into 16 bytes 57for the Tx side and 16 bytes for the Rx side. 58.Pp 59At the present time, the 60.Nm 61driver supports the non-DMA Async mode of operation, utilising the 62channel FIFOs to maximize throughput with minimal interrupt overhead. 63.Pp 64The Motorola MVME1x7 boards provide a 20MHz master clock to the device, 65which allows the Tx and Rx side to be independently set to any 66baud rate in the range 50 to 57600. 67The device should be capable of running at 68a baud rate of 115200, however it is not a rate documented in the 69device's datasheet for Async. mode so is not recommended. 70.Sh FILES 71.Bl -tag -width Pa 72.It Pa /dev/console 73.It Pa /dev/ttyC1 74.It Pa /dev/ttyC2 75.It Pa /dev/ttyC3 76.El 77.Sh DIAGNOSTICS 78.Bl -diag 79.It clmpcc%d: channel %d command timeout (idle) 80The chip failed to acknowledge a command sent to the specified 81channel. 82.It clmpcc%d: Failed to reset chip 83The 84.Nm 85driver was unable to determine if the chip completed 86it's RESET processing. 87.El 88.Sh SEE ALSO 89.Xr pcctwo 4 , 90.Xr tty 4 91.Sh HISTORY 92The 93.Nm 94driver first appeared in 95.Nx 1.4 96and is 97.Ud 98.Sh BUGS 99The hardware flow control features of the chip are not yet fully 100supported. 101