ns16550.h revision 4
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 * 334Srgrimes * @(#)ns16550.h 7.1 (Berkeley) 5/9/91 344Srgrimes */ 354Srgrimes 364Srgrimes/* 374Srgrimes * NS16550 UART registers 384Srgrimes */ 394Srgrimes 404Srgrimes#define com_data 0 /* data register (R/W) */ 414Srgrimes#define com_dlbl 0 /* divisor latch low (W) */ 424Srgrimes#define com_dlbh 1 /* divisor latch high (W) */ 434Srgrimes#define com_ier 1 /* interrupt enable (W) */ 444Srgrimes#define com_iir 2 /* interrupt identification (R) */ 454Srgrimes#define com_fifo 2 /* FIFO control (W) */ 464Srgrimes#define com_lctl 3 /* line control register (R/W) */ 474Srgrimes#define com_cfcr 3 /* line control register (R/W) */ 484Srgrimes#define com_mcr 4 /* modem control register (R/W) */ 494Srgrimes#define com_lsr 5 /* line status register (R/W) */ 504Srgrimes#define com_msr 6 /* modem status register (R/W) */ 51