79 lines
3.0 KiB
C
79 lines
3.0 KiB
C
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/* $NetBSD: ns16550.h,v 1.1 2003/06/25 17:24:22 cdi Exp $ */
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/*-
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* Copyright (C) 1995-1997 Gary Thomas (gdt@linuxppc.org)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Gary Thomas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* NS16550 Serial Port
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*/
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struct NS16550
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{
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volatile unsigned char rbr; /* 0 */
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volatile unsigned char ier; /* 1 */
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volatile unsigned char fcr; /* 2 */
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volatile unsigned char lcr; /* 3 */
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volatile unsigned char mcr; /* 4 */
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volatile unsigned char lsr; /* 5 */
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volatile unsigned char msr; /* 6 */
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volatile unsigned char scr; /* 7 */
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};
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#define thr rbr
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#define iir fcr
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#define dll rbr
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#define dlm ier
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#define LSR_DR 0x01 /* Data ready */
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#define LSR_OE 0x02 /* Overrun */
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#define LSR_PE 0x04 /* Parity error */
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#define LSR_FE 0x08 /* Framing error */
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#define LSR_BI 0x10 /* Break */
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#define LSR_THRE 0x20 /* Xmit holding register empty */
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#define LSR_TEMT 0x40 /* Xmitter empty */
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#define LSR_ERR 0x80 /* Error */
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#define LCR_EERS 0xBF /* Enable access to Enhanced Register Set */
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#define LCR_DLAB 0x80 /* Divisor latch access enable */
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#ifndef COMBASE
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#define COMBASE 0x80000000
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#endif
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#ifndef COMPROBE
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#define COMPROBE 0xa020001c
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#endif
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extern volatile struct NS16550 *NS16550_init __P((int, int));
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extern void NS16550_putc __P((volatile struct NS16550 *, int));
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extern int NS16550_getc __P((volatile struct NS16550 *));
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extern int NS16550_scankbd __P((volatile struct NS16550 *));
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extern int NS16550_test __P((volatile struct NS16550 *));
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