144 lines
3.6 KiB
C
144 lines
3.6 KiB
C
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/* $NetBSD: pcio.c,v 1.1.1.1 1997/03/14 02:40:33 perry Exp $ */
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/*
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* Copyright (c) 1996
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* Matthias Drochner. 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 for the NetBSD Project
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* by Matthias Drochner.
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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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/* console I/O
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needs lowlevel routines from conio.S and comio.S
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*/
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#include <lib/libsa/stand.h>
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#include "libi386.h"
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extern void conputc __P((int));
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extern int congetc __P((void));
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extern int coniskey __P((void));
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#ifdef SUPPORT_SERIAL
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extern void computc __P((int));
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extern int comgetc __P((void));
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extern int comiskey __P((void));
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static int iodev;
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#endif
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static char *iodevname[] = {
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"pc",
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#ifdef SUPPORT_SERIAL
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"com0",
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"com1"
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#endif
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};
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char *initio(dev)
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int dev;
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{
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#ifdef SUPPORT_SERIAL
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switch(dev){
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case CONSDEV_AUTO:
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/* serial console must have hardware handshake!
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check: 1. character output without error
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2. status bits for modem ready set
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(status seems only useful after character output)
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*/
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cominit(0);
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if(!(computc(' ', 0) & 0x80) && (comstatus(0) & 0x00b0))
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dev = 1;
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else {
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cominit(1);
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if(!(computc(' ', 1) & 0x80) && (comstatus(1) & 0x00b0))
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dev = 2;
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else
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dev = 0;
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}
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break;
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case CONSDEV_COM0: cominit(0); break;
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case CONSDEV_COM1: cominit(1); break;
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default: dev = 0; break;
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}
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return(iodevname[iodev = dev]);
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#else
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return(iodevname[0]);
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#endif
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}
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static inline void internal_putchar(c)
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int c;
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{
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#ifdef SUPPORT_SERIAL
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switch(iodev){
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case 0:
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#endif
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conputc(c);
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#ifdef SUPPORT_SERIAL
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break;
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case 1: computc(c, 0); break;
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case 2: computc(c, 1); break;
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}
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#endif
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}
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void putchar(c)
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int c;
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{
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if(c=='\n')
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internal_putchar('\r');
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internal_putchar(c);
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}
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int getchar(){
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#ifdef SUPPORT_SERIAL
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switch(iodev){
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case 0:
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#endif
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return(congetc());
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#ifdef SUPPORT_SERIAL
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case 1: return(comgetc(0));
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case 2: return(comgetc(1));
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}
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#endif
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}
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int iskey(){
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#ifdef SUPPORT_SERIAL
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switch(iodev){
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case 0:
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#endif
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return(coniskey());
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#ifdef SUPPORT_SERIAL
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case 1: return(!!(comstatus(0) & 0x0100));
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case 2: return(!!(comstatus(1) & 0x0100));
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}
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#endif
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}
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