323 lines
7.3 KiB
C
323 lines
7.3 KiB
C
/* $NetBSD: pcio.c,v 1.9 1999/04/14 11:17:05 drochner Exp $ */
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/*
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* Copyright (c) 1996, 1997
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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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/*
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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 <lib/libkern/libkern.h>
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#include "libi386.h"
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#include "bootinfo.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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struct btinfo_console btinfo_console;
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#ifdef SUPPORT_SERIAL
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static int iodev;
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#ifdef DIRECT_SERIAL
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#include "comio_direct.h"
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#define cominit cominit_d
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#define computc computc_d
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#define comgetc comgetc_d
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/* comstatus() is different */
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#define SERIAL_ARG btinfo_console.addr
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#else
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extern void cominit __P((int));
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extern int computc __P((int, int));
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extern int comgetc __P((int));
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extern int comstatus __P((int));
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#define SERIAL_ARG (iodev - CONSDEV_COM0)
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#endif /* DIRECT_SERIAL */
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static int getcomaddr __P((int));
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#endif /* SUPPORT_SERIAL */
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#define POLL_FREQ 10
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#ifdef SUPPORT_SERIAL
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static int
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getcomaddr(idx)
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int idx;
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{
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short addr;
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/* read in BIOS data area */
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pvbcopy((void *)(0x400 + 2 * idx), &addr, 2);
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return(addr);
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}
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#endif
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void
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initio(dev)
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int dev;
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{
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#ifdef SUPPORT_SERIAL
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int i;
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switch (dev) {
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case CONSDEV_AUTO:
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for(i = 0; i < 3; i++) {
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iodev = CONSDEV_COM0 + i;
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btinfo_console.addr = getcomaddr(i);
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if(!btinfo_console.addr) break;
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conputc('0' + i); /* to tell user what happens */
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cominit(SERIAL_ARG);
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#ifdef DIRECT_SERIAL
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/* check for:
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* 1. successful output
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* 2. optionally, keypress within 1s
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*/
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if ( computc(':', SERIAL_ARG) &&
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computc('-', SERIAL_ARG) &&
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computc('(', SERIAL_ARG)
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#ifdef COMCONS_KEYPRESS
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&& awaitkey(7, 0)
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#endif
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)
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goto ok;
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#else
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/*
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* serial console must have hardware handshake!
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* check:
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* 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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* 3. optionally, keypress within 1s
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*/
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if (!(computc('@', SERIAL_ARG) & 0x80)
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&& (comstatus(SERIAL_ARG) & 0x00b0)
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#ifdef COMCONS_KEYPRESS
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&& awaitkey(7, 0)
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#endif
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)
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goto ok;
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#endif
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}
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iodev = CONSDEV_PC;
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ok:
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break;
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case CONSDEV_COM0:
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case CONSDEV_COM1:
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case CONSDEV_COM2:
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case CONSDEV_COM3:
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iodev = dev;
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btinfo_console.addr = getcomaddr(iodev - CONSDEV_COM0);
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if(!btinfo_console.addr) goto nocom;
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cominit(SERIAL_ARG);
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break;
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case CONSDEV_COM0KBD:
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case CONSDEV_COM1KBD:
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case CONSDEV_COM2KBD:
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case CONSDEV_COM3KBD:
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iodev = dev - 4;
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i = iodev - CONSDEV_COM0;
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btinfo_console.addr = getcomaddr(i);
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if(!btinfo_console.addr) goto nocom;
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conputc('0' + i); /* to tell user what happens */
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cominit(SERIAL_ARG);
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#ifdef DIRECT_SERIAL
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/* check for:
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* 1. successful output
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* 2. optionally, keypress within 1s
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*/
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if ( computc(':', SERIAL_ARG) &&
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computc('-', SERIAL_ARG) &&
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computc('(', SERIAL_ARG)
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#ifdef COMCONS_KEYPRESS
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&& awaitkey(7, 0)
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#endif
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)
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break;
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#else
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/*
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* serial console must have hardware handshake!
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* check:
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* 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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* 3. optionally, keypress within 1s
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*/
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if (!(computc('@', SERIAL_ARG) & 0x80)
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&& (comstatus(SERIAL_ARG) & 0x00b0)
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#ifdef COMCONS_KEYPRESS
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&& awaitkey(7, 0)
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#endif
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)
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break;
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#endif
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default:
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nocom:
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iodev = CONSDEV_PC;
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break;
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}
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conputc('\015');
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conputc('\n');
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strncpy(btinfo_console.devname, iodev == CONSDEV_PC ? "pc" : "com", 16);
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#if defined(DIRECT_SERIAL) && defined(CONSPEED)
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btinfo_console.speed = CONSPEED;
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#else
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btinfo_console.speed = 9600;
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#endif
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#else /* !SUPPORT_SERIAL */
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strncpy(btinfo_console.devname, "pc", 16);
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#endif /* SUPPORT_SERIAL */
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}
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static inline void internal_putchar __P((int));
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static inline void
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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 CONSDEV_PC:
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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 CONSDEV_COM0:
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case CONSDEV_COM1:
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case CONSDEV_COM2:
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case CONSDEV_COM3:
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computc(c, SERIAL_ARG);
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break;
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}
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#endif
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}
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void
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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
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getchar()
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{
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#ifdef SUPPORT_SERIAL
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int c;
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switch (iodev) {
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default: /* to make gcc -Wall happy... */
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case CONSDEV_PC:
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#endif
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return (congetc());
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#ifdef SUPPORT_SERIAL
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case CONSDEV_COM0:
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case CONSDEV_COM1:
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case CONSDEV_COM2:
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case CONSDEV_COM3:
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#ifdef DIRECT_SERIAL
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c = comgetc(SERIAL_ARG);
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#else
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do {
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c = comgetc(SERIAL_ARG);
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} while ((c >> 8) == 0xe0); /* catch timeout */
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#ifdef COMDEBUG
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if (c & 0x8000) {
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printf("com input %x, status %x\n",
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c, comstatus(SERIAL_ARG));
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}
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#endif
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c &= 0xff;
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#endif /* DIRECT_SERIAL */
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return (c);
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}
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#endif /* SUPPORT_SERIAL */
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}
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int
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iskey()
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{
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#ifdef SUPPORT_SERIAL
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switch (iodev) {
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default: /* to make gcc -Wall happy... */
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case CONSDEV_PC:
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#endif
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return (coniskey());
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#ifdef SUPPORT_SERIAL
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case CONSDEV_COM0:
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case CONSDEV_COM1:
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case CONSDEV_COM2:
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case CONSDEV_COM3:
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#ifdef DIRECT_SERIAL
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return(!!comstatus_d(SERIAL_ARG));
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#else
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return (!!(comstatus(SERIAL_ARG) & 0x0100));
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#endif
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}
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#endif /* SUPPORT_SERIAL */
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}
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char
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awaitkey(timeout, tell)
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int timeout, tell;
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{
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int i;
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char c = 0;
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i = timeout * POLL_FREQ;
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while (i) {
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if (tell && (i % POLL_FREQ) == 0)
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printf("%d\b", i/POLL_FREQ);
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if (iskey()) {
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/* flush input buffer */
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while (iskey())
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c = getchar();
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goto out; /* XXX what happens if c == 0? */
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}
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delay(1000000 / POLL_FREQ);
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i--;
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}
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out:
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if (tell)
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printf("0\n");
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return(c);
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}
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