1 /* $NetBSD: comreg.h,v 1.4 1994/10/27 04:17:02 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1991 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)comreg.h 7.2 (Berkeley) 5/9/91 36 */ 37 38 #include <i386/isa/ic/ns16550.h> 39 40 #define COM_FREQ 1843200 /* 16-bit baud rate divisor */ 41 #define COM_TOLERANCE 30 /* baud rate tolerance, in 0.1% units */ 42 43 /* interrupt enable register */ 44 #define IER_ERXRDY 0x1 45 #define IER_ETXRDY 0x2 46 #define IER_ERLS 0x4 47 #define IER_EMSC 0x8 48 49 /* interrupt identification register */ 50 #define IIR_IMASK 0xf 51 #define IIR_RXTOUT 0xc 52 #define IIR_RLS 0x6 53 #define IIR_RXRDY 0x4 54 #define IIR_TXRDY 0x2 55 #define IIR_NOPEND 0x1 56 #define IIR_MLSC 0x0 57 #define IIR_FIFO_MASK 0xc0 /* set if FIFOs are enabled */ 58 59 /* fifo control register */ 60 #define FIFO_ENABLE 0x01 61 #define FIFO_RCV_RST 0x02 62 #define FIFO_XMT_RST 0x04 63 #define FIFO_DMA_MODE 0x08 64 #define FIFO_TRIGGER_1 0x00 65 #define FIFO_TRIGGER_4 0x40 66 #define FIFO_TRIGGER_8 0x80 67 #define FIFO_TRIGGER_14 0xc0 68 69 /* character format control register */ 70 #define CFCR_DLAB 0x80 71 #define CFCR_SBREAK 0x40 72 #define CFCR_PZERO 0x30 73 #define CFCR_PONE 0x20 74 #define CFCR_PEVEN 0x10 75 #define CFCR_PODD 0x00 76 #define CFCR_PENAB 0x08 77 #define CFCR_STOPB 0x04 78 #define CFCR_8BITS 0x03 79 #define CFCR_7BITS 0x02 80 #define CFCR_6BITS 0x01 81 #define CFCR_5BITS 0x00 82 83 /* modem control register */ 84 #define MCR_LOOPBACK 0x10 85 #define MCR_IENABLE 0x08 86 #define MCR_DRS 0x04 87 #define MCR_RTS 0x02 88 #define MCR_DTR 0x01 89 90 /* line status register */ 91 #define LSR_RCV_FIFO 0x80 92 #define LSR_TSRE 0x40 93 #define LSR_TXRDY 0x20 94 #define LSR_BI 0x10 95 #define LSR_FE 0x08 96 #define LSR_PE 0x04 97 #define LSR_OE 0x02 98 #define LSR_RXRDY 0x01 99 #define LSR_RCV_MASK 0x1f 100 101 /* modem status register */ 102 #define MSR_DCD 0x80 103 #define MSR_RI 0x40 104 #define MSR_DSR 0x20 105 #define MSR_CTS 0x10 106 #define MSR_DDCD 0x08 107 #define MSR_TERI 0x04 108 #define MSR_DDSR 0x02 109 #define MSR_DCTS 0x01 110 111 #define COM_NPORTS 8 112 113 /* 114 * WARNING: Serial console is assumed to be at COM1 address 115 * and CONUNIT must be 0. 116 */ 117 #define CONADDR (0x3f8) 118 #define CONUNIT (0) 119