The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/esp.h

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    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: releng/11.0/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_ */

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