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