esp.h revision 77961 
1/*-
2 * Copyright (c) 1995 Sean Eric Fagan.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/sys/dev/ic/esp.h 77961 2001-06-10 04:20:37Z nyan $
30 */
31
32#ifndef _IC_ESP_H_
33#define	_IC_ESP_H_
34
35/*
36 * Definitions for Hayes ESP serial cards.
37 */
38
39/*
40 * CMD1 and CMD2 are the command ports, offsets from <esp_iobase>.
41 */
42#define	ESP_CMD1	4
43#define	ESP_CMD2	5
44
45/*
46 * STAT1 and STAT2 are to get return values and status bytes;
47 * they overload CMD1 and CMD2.
48 */
49#define	ESP_STATUS1	ESP_CMD1
50#define	ESP_STATUS2	ESP_CMD2
51
52/*
53 * Commands.  Commands are given by writing the command value to
54 * ESP_CMD1 and then writing or reading some number of bytes from
55 * ESP_CMD2 or ESP_STATUS2.
56 */
57#define	ESP_GETTEST	0x01	/* self-test command (1 byte + extras) */
58#define	ESP_GETDIPS	0x02	/* get on-board DIP switches (1 byte) */
59#define	ESP_SETFLOWTYPE	0x08	/* set type of flow-control (2 bytes) */
60#define	ESP_SETRXFLOW	0x0a	/* set Rx FIFO flow control levels (4 bytes) */
61#define	ESP_SETMODE	0x10	/* set board mode (1 byte) */
62#define	ESP_SETCLOCK	0x23	/* set UART clock prescaler */
63
64/* Mode bits (ESP_SETMODE). */
65#define	ESP_MODE_FIFO	0x02	/* act like a 16550 (compatibility mode) */
66#define	ESP_MODE_RTS	0x04	/* use RTS hardware flow control */
67#define	ESP_MODE_SCALE	0x80	/* scale FIFO trigger levels */
68
69/* Flow control type bits (ESP_SETFLOWTYPE). */
70#define	ESP_FLOW_RTS	0x04	/* cmd1: local Rx sends RTS flow control */
71#define	ESP_FLOW_CTS	0x10	/* cmd2: local transmitter responds to CTS */
72
73/* Used by ESP_SETRXFLOW. */
74#define	HIBYTE(w)	(((w) >> 8) & 0xff)
75#define	LOBYTE(w)	((w) & 0xff)
76
77#endif /* !_IC_ESP_H_ */
78