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 | |