1/* $NetBSD: ns16550reg.h,v 1.11 2016/05/27 20:01:49 bouyer 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. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)ns16550.h 7.1 (Berkeley) 5/9/91
32 */
33
34/*
35 * NS16550 UART registers
36 */
37
38#define com_data 0 /* data register (R/W) */
39#define com_dlbl 0 /* divisor latch low (W) */
40#define com_dlbh 1 /* divisor latch high (W) */
41#define com_ier 1 /* interrupt enable (W) */
42#define com_iir 2 /* interrupt identification (R) */
43#define com_fifo 2 /* FIFO control (W) */
44#define com_lctl 3 /* line control register (R/W) */
45#define com_cfcr 3 /* line control register (R/W) */
46#define com_mcr 4 /* modem control register (R/W) */
47#define com_lsr 5 /* line status register (R/W) */
48#define com_msr 6 /* modem status register (R/W) */
49#define com_scratch 7 /* scratch register (R/W) */
50
51/*
52 * Additional register present in NS16750
53 */
54#ifdef COM_16750
55#define com_usr 31 /* status register (R) */
56#endif
57#ifdef COM_AWIN
58#define com_usr 31 /* status register (R) */
59#define com_tfl 32 /* transmit fifo level (R) */
60#define com_rfl 33 /* receive fifo level (R) */
61#define com_halt 41 /* halt tx (R/W) */
62#endif
63