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