1 /* $OpenBSD: espreg.h,v 1.2 1996/10/31 01:01:30 niklas Exp $ */
2
3 /*-
4 * Copyright (c) 1995 Sean E. Fagin, John M Vinopal.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the names of contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #ifndef _ESPREG_H_
32 #define _ESPREG_H_
33
34 /*
35 * Definitions for Hayes ESP serial cards.
36 */
37
38 /*
39 * CMD1 and CMD2 are the command ports, offsets from <esp_iobase>.
40 */
41 #define ESP_CMD1 4
42 #define ESP_CMD2 5
43
44 /*
45 * STAT1 and STAT2 are to get return values and status bytes
46 */
47 #define ESP_STATUS1 ESP_CMD1
48 #define ESP_STATUS2 ESP_CMD2
49
50 /*
51 * Commands. Commands are given by writing the command value to
52 * ESP_CMD1 and then writing or reading some number of bytes from
53 * ESP_CMD2 or ESP_STATUS2.
54 */
55 #define ESP_GETTEST 0x01 /* self-test command (1 byte + extras) */
56 #define ESP_GETDIPS 0x02 /* get on-board DIP switches (1 byte) */
57 #define ESP_SETFLOWTYPE 0x08 /* set type of flow-control (2 bytes) */
58 #define ESP_SETRXFLOW 0x0a /* set Rx FIFO flow control levels (4 bytes) */
59 #define ESP_SETMODE 0x10 /* set board mode (1 byte) */
60
61 /* Mode bits (ESP_SETMODE). */
62 #define ESP_MODE_FIFO 0x02 /* act like a 16550 (compatibility mode) */
63 #define ESP_MODE_RTS 0x04 /* use RTS hardware flow control */
64 #define ESP_MODE_SCALE 0x80 /* scale FIFO trigger levels */
65
66 /* Flow control type bits (ESP_SETFLOWTYPE). */
67 #define ESP_FLOW_RTS 0x04 /* cmd1: local Rx sends RTS flow control */
68 #define ESP_FLOW_CTS 0x10 /* cmd2: local transmitter responds to CTS */
69
70 /* Used by ESP_SETRXFLOW. */
71 #define RXHIGHWATER 768
72 #define RXLOWWATER 512
73 #define HIBYTE(w) (((w) >> 8) & 0xff)
74 #define LOBYTE(w) ((w) & 0xff)
75
76 #endif /* !_ESPREG_H_ */