1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1995 Sean Eric Fagan.
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 author nor the names of 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 AUTHOR 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 AUTHOR 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 * $FreeBSD$
32 */
33
34#ifndef _IC_ESP_H_
35#define	_IC_ESP_H_
36
37/*
38 * Definitions for Hayes ESP serial cards.
39 */
40
41/*
42 * CMD1 and CMD2 are the command ports, offsets from <esp_iobase>.
43 */
44#define	ESP_CMD1	4
45#define	ESP_CMD2	5
46
47/*
48 * STAT1 and STAT2 are to get return values and status bytes;
49 * they overload CMD1 and CMD2.
50 */
51#define	ESP_STATUS1	ESP_CMD1
52#define	ESP_STATUS2	ESP_CMD2
53
54/*
55 * Commands.  Commands are given by writing the command value to
56 * ESP_CMD1 and then writing or reading some number of bytes from
57 * ESP_CMD2 or ESP_STATUS2.
58 */
59#define	ESP_GETTEST	0x01	/* self-test command (1 byte + extras) */
60#define	ESP_GETDIPS	0x02	/* get on-board DIP switches (1 byte) */
61#define	ESP_SETFLOWTYPE	0x08	/* set type of flow-control (2 bytes) */
62#define	ESP_SETRXFLOW	0x0a	/* set Rx FIFO flow control levels (4 bytes) */
63#define	ESP_SETMODE	0x10	/* set board mode (1 byte) */
64#define	ESP_SETCLOCK	0x23	/* set UART clock prescaler */
65
66/* Mode bits (ESP_SETMODE). */
67#define	ESP_MODE_FIFO	0x02	/* act like a 16550 (compatibility mode) */
68#define	ESP_MODE_RTS	0x04	/* use RTS hardware flow control */
69#define	ESP_MODE_SCALE	0x80	/* scale FIFO trigger levels */
70
71/* Flow control type bits (ESP_SETFLOWTYPE). */
72#define	ESP_FLOW_RTS	0x04	/* cmd1: local Rx sends RTS flow control */
73#define	ESP_FLOW_CTS	0x10	/* cmd2: local transmitter responds to CTS */
74
75/* Used by ESP_SETRXFLOW. */
76#define	HIBYTE(w)	(((w) >> 8) & 0xff)
77#define	LOBYTE(w)	((w) & 0xff)
78
79#endif /* !_IC_ESP_H_ */
80