ns16550.h revision 50477
14Srgrimes/*- 24Srgrimes * Copyright (c) 1991 The Regents of the University of California. 34Srgrimes * All rights reserved. 44Srgrimes * 54Srgrimes * Redistribution and use in source and binary forms, with or without 64Srgrimes * modification, are permitted provided that the following conditions 74Srgrimes * are met: 84Srgrimes * 1. Redistributions of source code must retain the above copyright 94Srgrimes * notice, this list of conditions and the following disclaimer. 104Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 114Srgrimes * notice, this list of conditions and the following disclaimer in the 124Srgrimes * documentation and/or other materials provided with the distribution. 134Srgrimes * 3. All advertising materials mentioning features or use of this software 144Srgrimes * must display the following acknowledgement: 154Srgrimes * This product includes software developed by the University of 164Srgrimes * California, Berkeley and its contributors. 174Srgrimes * 4. Neither the name of the University nor the names of its contributors 184Srgrimes * may be used to endorse or promote products derived from this software 194Srgrimes * without specific prior written permission. 204Srgrimes * 214Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 224Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 234Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 244Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 254Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 264Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 274Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 284Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 294Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 304Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 314Srgrimes * SUCH DAMAGE. 324Srgrimes * 33619Srgrimes * from: @(#)ns16550.h 7.1 (Berkeley) 5/9/91 3450477Speter * $FreeBSD: head/sys/dev/ic/ns16550.h 50477 1999-08-28 01:08:13Z peter $ 354Srgrimes */ 364Srgrimes 374Srgrimes/* 384Srgrimes * NS16550 UART registers 394Srgrimes */ 4018265Sasami#ifdef PC98 4118265Sasami#define com_data 0x000 /* data register (R/W) */ 4218265Sasami#define com_dlbl 0x000 /* divisor latch low (W) */ 4318265Sasami#define com_dlbh 0x100 /* divisor latch high (W) */ 4418265Sasami#define com_ier 0x100 /* interrupt enable (W) */ 4518265Sasami#define com_iir 0x200 /* interrupt identification (R) */ 4618265Sasami#define com_fifo 0x200 /* FIFO control (W) */ 4718265Sasami#define com_lctl 0x300 /* line control register (R/W) */ 4818265Sasami#define com_cfcr 0x300 /* line control register (R/W) */ 4918265Sasami#define com_mcr 0x400 /* modem control register (R/W) */ 5018265Sasami#define com_lsr 0x500 /* line status register (R/W) */ 5118265Sasami#define com_msr 0x600 /* modem status register (R/W) */ 5218265Sasami#else /* IBM-PC */ 534Srgrimes#define com_data 0 /* data register (R/W) */ 544Srgrimes#define com_dlbl 0 /* divisor latch low (W) */ 554Srgrimes#define com_dlbh 1 /* divisor latch high (W) */ 564Srgrimes#define com_ier 1 /* interrupt enable (W) */ 574Srgrimes#define com_iir 2 /* interrupt identification (R) */ 584Srgrimes#define com_fifo 2 /* FIFO control (W) */ 594Srgrimes#define com_lctl 3 /* line control register (R/W) */ 604Srgrimes#define com_cfcr 3 /* line control register (R/W) */ 614Srgrimes#define com_mcr 4 /* modem control register (R/W) */ 624Srgrimes#define com_lsr 5 /* line status register (R/W) */ 634Srgrimes#define com_msr 6 /* modem status register (R/W) */ 6418265Sasami#endif /* PC98 */ 65