NetBSD/sys/arch/i386/stand/lib/pcio.c

332 lines
7.4 KiB
C

/* $NetBSD: pcio.c,v 1.10 1999/09/10 16:23:55 drochner Exp $ */
/*
* Copyright (c) 1996, 1997
* Matthias Drochner. All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project
* by Matthias Drochner.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
*/
/*
* console I/O
* needs lowlevel routines from conio.S and comio.S
*/
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>
#include "libi386.h"
#include "bootinfo.h"
extern void conputc __P((int));
extern int congetc __P((void));
extern int coniskey __P((void));
struct btinfo_console btinfo_console;
#ifdef SUPPORT_SERIAL
static int iodev;
#ifdef DIRECT_SERIAL
#include "comio_direct.h"
#define cominit cominit_d
#define computc computc_d
#define comgetc comgetc_d
/* comstatus() is different */
#define SERIAL_ARG btinfo_console.addr
#else
extern void cominit __P((int));
extern int computc __P((int, int));
extern int comgetc __P((int));
extern int comstatus __P((int));
#define SERIAL_ARG (iodev - CONSDEV_COM0)
#endif /* DIRECT_SERIAL */
static int getcomaddr __P((int));
#endif /* SUPPORT_SERIAL */
#define POLL_FREQ 10
#ifdef SUPPORT_SERIAL
static int
getcomaddr(idx)
int idx;
{
short addr;
/* read in BIOS data area */
pvbcopy((void *)(0x400 + 2 * idx), &addr, 2);
return(addr);
}
#endif
void
initio(dev)
int dev;
{
#ifdef SUPPORT_SERIAL
int i;
switch (dev) {
case CONSDEV_AUTO:
for(i = 0; i < 3; i++) {
iodev = CONSDEV_COM0 + i;
btinfo_console.addr = getcomaddr(i);
if(!btinfo_console.addr) break;
conputc('0' + i); /* to tell user what happens */
cominit(SERIAL_ARG);
#ifdef DIRECT_SERIAL
/* check for:
* 1. successful output
* 2. optionally, keypress within 1s
*/
if ( computc(':', SERIAL_ARG) &&
computc('-', SERIAL_ARG) &&
computc('(', SERIAL_ARG)
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
goto ok;
#else
/*
* serial console must have hardware handshake!
* check:
* 1. character output without error
* 2. status bits for modem ready set
* (status seems only useful after character output)
* 3. optionally, keypress within 1s
*/
if (!(computc('@', SERIAL_ARG) & 0x80)
&& (comstatus(SERIAL_ARG) & 0x00b0)
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
goto ok;
#endif
}
iodev = CONSDEV_PC;
ok:
break;
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
iodev = dev;
btinfo_console.addr = getcomaddr(iodev - CONSDEV_COM0);
if(!btinfo_console.addr) goto nocom;
cominit(SERIAL_ARG);
break;
case CONSDEV_COM0KBD:
case CONSDEV_COM1KBD:
case CONSDEV_COM2KBD:
case CONSDEV_COM3KBD:
iodev = dev - 4;
i = iodev - CONSDEV_COM0;
btinfo_console.addr = getcomaddr(i);
if(!btinfo_console.addr) goto nocom;
conputc('0' + i); /* to tell user what happens */
cominit(SERIAL_ARG);
#ifdef DIRECT_SERIAL
/* check for:
* 1. successful output
* 2. optionally, keypress within 1s
*/
if ( computc(':', SERIAL_ARG) &&
computc('-', SERIAL_ARG) &&
computc('(', SERIAL_ARG)
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
break;
#else
/*
* serial console must have hardware handshake!
* check:
* 1. character output without error
* 2. status bits for modem ready set
* (status seems only useful after character output)
* 3. optionally, keypress within 1s
*/
if (!(computc('@', SERIAL_ARG) & 0x80)
&& (comstatus(SERIAL_ARG) & 0x00b0)
#ifdef COMCONS_KEYPRESS
&& awaitkey(7, 0)
#endif
)
break;
#endif
default:
nocom:
iodev = CONSDEV_PC;
break;
}
conputc('\015');
conputc('\n');
strncpy(btinfo_console.devname, iodev == CONSDEV_PC ? "pc" : "com", 16);
#if defined(DIRECT_SERIAL) && defined(CONSPEED)
btinfo_console.speed = CONSPEED;
#else
btinfo_console.speed = 9600;
#endif
#else /* !SUPPORT_SERIAL */
strncpy(btinfo_console.devname, "pc", 16);
#endif /* SUPPORT_SERIAL */
}
static inline void internal_putchar __P((int));
static inline void
internal_putchar(c)
int c;
{
#ifdef SUPPORT_SERIAL
switch (iodev) {
case CONSDEV_PC:
#endif
conputc(c);
#ifdef SUPPORT_SERIAL
break;
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
computc(c, SERIAL_ARG);
break;
}
#endif
}
void
putchar(c)
int c;
{
if (c == '\n')
internal_putchar('\r');
internal_putchar(c);
}
int
getchar()
{
#ifdef SUPPORT_SERIAL
int c;
switch (iodev) {
default: /* to make gcc -Wall happy... */
case CONSDEV_PC:
#endif
return (congetc());
#ifdef SUPPORT_SERIAL
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
#ifdef DIRECT_SERIAL
c = comgetc(SERIAL_ARG);
#else
do {
c = comgetc(SERIAL_ARG);
} while ((c >> 8) == 0xe0); /* catch timeout */
#ifdef COMDEBUG
if (c & 0x8000) {
printf("com input %x, status %x\n",
c, comstatus(SERIAL_ARG));
}
#endif
c &= 0xff;
#endif /* DIRECT_SERIAL */
return (c);
}
#endif /* SUPPORT_SERIAL */
}
int
iskey()
{
#ifdef SUPPORT_SERIAL
switch (iodev) {
default: /* to make gcc -Wall happy... */
case CONSDEV_PC:
#endif
return (coniskey());
#ifdef SUPPORT_SERIAL
case CONSDEV_COM0:
case CONSDEV_COM1:
case CONSDEV_COM2:
case CONSDEV_COM3:
#ifdef DIRECT_SERIAL
return(!!comstatus_d(SERIAL_ARG));
#else
return (!!(comstatus(SERIAL_ARG) & 0x0100));
#endif
}
#endif /* SUPPORT_SERIAL */
}
char
awaitkey(timeout, tell)
int timeout, tell;
{
int i;
char c = 0;
i = timeout * POLL_FREQ;
while (i) {
if (tell && (i % POLL_FREQ) == 0) {
char numbuf[20];
int len, j;
sprintf(numbuf, "%d ", i/POLL_FREQ);
len = strlen(numbuf);
for (j = 0; j < len; j++)
numbuf[len + j] = '\b';
numbuf[len + j] = '\0';
printf(numbuf);
}
if (iskey()) {
/* flush input buffer */
while (iskey())
c = getchar();
goto out; /* XXX what happens if c == 0? */
}
delay(1000000 / POLL_FREQ);
i--;
}
out:
if (tell)
printf("0\n");
return(c);
}