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freebsd/usr.bin/doscmd/port.c
Warner Losh 6d54a68468 Add support for accessing ports. This was done to access parallel
ports, but should work for others as well.

Submitted by:  Parag Patel <parag@cgt.com>
1999-01-20 17:55:22 +00:00

421 lines
9.1 KiB
C

/*
* Copyright (c) 1992, 1993, 1996
* Berkeley Software Design, Inc. 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 by Berkeley Software
* Design, Inc.
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``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 Berkeley Software Design, Inc. 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.
*
* BSDI port.c,v 2.2 1996/04/08 19:33:03 bostic Exp
*
* $Id: port.c,v 1.1 1997/08/09 01:42:54 dyson Exp $
*/
#include "doscmd.h"
#define MINPORT 0x000
#define MAXPORT_MASK (MAXPORT - 1)
#include <sys/ioctl.h>
#include <machine/sysarch.h>
static int consfd = -1;
#define in(port) \
({ \
register int _inb_result; \
\
asm volatile ("xorl %%eax,%%eax; inb %%dx,%%al" : \
"=a" (_inb_result) : "d" (port)); \
_inb_result; \
})
#define out(port, data) \
asm volatile ("outb %%al,%%dx" : : "a" (data), "d" (port))
FILE *iolog = 0;
u_long ioports[MAXPORT/32];
#ifdef __FreeBSD__
static void
iomap(int port, int cnt)
{
if (port + cnt >= MAXPORT) {
errno = ERANGE;
goto bad;
}
if (i386_set_ioperm(port, cnt, 1) < 0) {
bad:
perror("iomap");
quit(1);
}
}
static void
iounmap(int port, int cnt)
{
if (port + cnt >= MAXPORT) {
errno = ERANGE;
goto bad;
}
if (i386_set_ioperm(port, cnt, 0) < 0) {
bad:
perror("iounmap");
quit(1);
}
}
#else
static void
iomap(int port, int cnt)
{
if (port + cnt >= MAXPORT) {
errno = ERANGE;
goto bad;
}
while (cnt--) {
ioports[port/32] |= (1 << (port%32));
port++;
}
if (i386_set_ioperm(ioports) < 0) {
bad:
perror("iomap");
quit(1);
}
}
static void
iounmap(int port, int cnt)
{
if (port + cnt >= MAXPORT) {
errno = ERANGE;
goto bad;
}
while (cnt--) {
ioports[port/32] &= ~(1 << (port%32));
port++;
}
if (i386_set_ioperm(ioports) < 0) {
bad:
perror("iounmap");
quit(1);
}
}
#endif
void
outb_traceport(int port, unsigned char byte)
{
/*
if (!iolog && !(iolog = fopen("/tmp/iolog", "a")))
iolog = stderr;
fprintf(iolog, "0x%03X -> %02X\n", port, byte);
*/
iomap(port, 1);
out(port, byte);
iounmap(port, 1);
}
unsigned char
inb_traceport(int port)
{
unsigned char byte;
/*
if (!iolog && !(iolog = fopen("/tmp/iolog", "a")))
iolog = stderr;
*/
iomap(port, 1);
byte = in(port);
iounmap(port, 1);
/*
fprintf(iolog, "0x%03X <- %02X\n", port, byte);
fflush(iolog);
*/
return(byte);
}
/*
* Fake input/output ports
*/
static void
outb_nullport(int port, unsigned char byte)
{
/*
debug(D_PORT, "outb_nullport called for port 0x%03X = 0x%02X.\n",
port, byte);
*/
}
static unsigned char
inb_nullport(int port)
{
/*
debug(D_PORT, "inb_nullport called for port 0x%03X.\n", port);
*/
return(0xff);
}
/*
* configuration table for ports' emulators
*/
struct portsw {
unsigned char (*p_inb)(int port);
void (*p_outb)(int port, unsigned char byte);
} portsw[MAXPORT];
void
init_io_port_handlers(void)
{
int i;
for (i = 0; i < MAXPORT; i++) {
if (portsw[i].p_inb == 0)
portsw[i].p_inb = inb_nullport;
if (portsw[i].p_outb == 0)
portsw[i].p_outb = outb_nullport;
}
}
void
define_input_port_handler(int port, unsigned char (*p_inb)(int port))
{
if ((port >= MINPORT) && (port < MAXPORT)) {
portsw[port].p_inb = p_inb;
} else
fprintf (stderr, "attempt to handle invalid port 0x%04x", port);
}
void
define_output_port_handler(int port, void (*p_outb)(int port, unsigned char byte))
{
if ((port >= MINPORT) && (port < MAXPORT)) {
portsw[port].p_outb = p_outb;
} else
fprintf (stderr, "attempt to handle invalid port 0x%04x", port);
}
void
inb(regcontext_t *REGS, int port)
{
unsigned char (*in_handler)(int);
if ((port >= MINPORT) && (port < MAXPORT))
in_handler = portsw[port].p_inb;
else
in_handler = inb_nullport;
R_AL = (*in_handler)(port);
debug(D_PORT, "IN on port %02x -> %02x\n", port, R_AL);
}
void
insb(regcontext_t *REGS, int port)
{
unsigned char (*in_handler)(int);
unsigned char data;
if ((port >= MINPORT) && (port < MAXPORT))
in_handler = portsw[port].p_inb;
else
in_handler = inb_nullport;
data = (*in_handler)(port);
*(u_char *)N_GETPTR(R_ES, R_DI) = data;
debug(D_PORT, "INS on port %02x -> %02x\n", port, data);
if (R_FLAGS & PSL_D)
R_DI--;
else
R_DI++;
}
void
inx(regcontext_t *REGS, int port)
{
unsigned char (*in_handler)(int);
if ((port >= MINPORT) && (port < MAXPORT))
in_handler = portsw[port].p_inb;
else
in_handler = inb_nullport;
R_AL = (*in_handler)(port);
if ((port >= MINPORT) && (port < MAXPORT))
in_handler = portsw[port + 1].p_inb;
else
in_handler = inb_nullport;
R_AH = (*in_handler)(port + 1);
debug(D_PORT, "IN on port %02x -> %04x\n", port, R_AX);
}
void
insx(regcontext_t *REGS, int port)
{
unsigned char (*in_handler)(int);
unsigned char data;
if ((port >= MINPORT) && (port < MAXPORT))
in_handler = portsw[port].p_inb;
else
in_handler = inb_nullport;
data = (*in_handler)(port);
*(u_char *)N_GETPTR(R_ES, R_DI) = data;
debug(D_PORT, "INS on port %02x -> %02x\n", port, data);
if ((port >= MINPORT) && (port < MAXPORT))
in_handler = portsw[port + 1].p_inb;
else
in_handler = inb_nullport;
data = (*in_handler)(port + 1);
((u_char *)N_GETPTR(R_ES, R_DI))[1] = data;
debug(D_PORT, "INS on port %02x -> %02x\n", port, data);
if (R_FLAGS & PSL_D)
R_DI -= 2;
else
R_DI += 2;
}
void
outb(regcontext_t *REGS, int port)
{
void (*out_handler)(int, unsigned char);
if ((port >= MINPORT) && (port < MAXPORT))
out_handler = portsw[port].p_outb;
else
out_handler = outb_nullport;
(*out_handler)(port, R_AL);
debug(D_PORT, "OUT on port %02x <- %02x\n", port, R_AL);
/*
if (port == 0x3bc && R_AL == 0x55)
tmode = 1;
*/
}
void
outx(regcontext_t *REGS, int port)
{
void (*out_handler)(int, unsigned char);
if ((port >= MINPORT) && (port < MAXPORT))
out_handler = portsw[port].p_outb;
else
out_handler = outb_nullport;
(*out_handler)(port, R_AL);
debug(D_PORT, "OUT on port %02x <- %02x\n", port, R_AL);
if ((port >= MINPORT) && (port < MAXPORT))
out_handler = portsw[port + 1].p_outb;
else
out_handler = outb_nullport;
(*out_handler)(port + 1, R_AH);
debug(D_PORT, "OUT on port %02x <- %02x\n", port + 1, R_AH);
}
void
outsb(regcontext_t *REGS, int port)
{
void (*out_handler)(int, unsigned char);
unsigned char value;
if ((port >= MINPORT) && (port < MAXPORT))
out_handler = portsw[port].p_outb;
else
out_handler = outb_nullport;
value = *(u_char *)N_GETPTR(R_ES, R_DI);
debug(D_PORT, "OUT on port %02x <- %02x\n", port, value);
(*out_handler)(port, value);
if (R_FLAGS & PSL_D)
R_DI--;
else
R_DI++;
}
void
outsx(regcontext_t *REGS, int port)
{
void (*out_handler)(int, unsigned char);
unsigned char value;
if ((port >= MINPORT) && (port < MAXPORT))
out_handler = portsw[port].p_outb;
else
out_handler = outb_nullport;
value = *(u_char *)N_GETPTR(R_ES, R_DI);
debug(D_PORT, "OUT on port %02x <- %02x\n", port, value);
(*out_handler)(port, value);
if ((port >= MINPORT) && (port < MAXPORT))
out_handler = portsw[port + 1].p_outb;
else
out_handler = outb_nullport;
value = ((u_char *)N_GETPTR(R_ES, R_DI))[1];
debug(D_PORT, "OUT on port %02x <- %02x\n", port+1, value);
(*out_handler)(port + 1, value);
if (R_FLAGS & PSL_D)
R_DI -= 2;
else
R_DI += 2;
}
unsigned char port_61 = 0x10;
int sound_on = 1;
int sound_freq = 1000;
void
outb_speaker(int port, unsigned char byte)
{
#if 0 /*XXXXX*/
if (raw_kbd) {
if ((port_61 & 3) != 3) {
if ((byte & 3) == 3 && /* prtim[2].gate && */ sound_on)
ioctl(kbd_fd, PCCONIOCSTARTBEEP, &sound_freq);
} else if ((byte & 3) != 3)
ioctl(kbd_fd, PCCONIOCSTOPBEEP);
}
#endif
port_61 = byte;
}
unsigned char
inb_speaker(int port)
{
/* port_61 = (port_61 + 1) & 0xff; */
return(port_61);
}
void
speaker_init()
{
define_input_port_handler(0x61, inb_speaker);
define_output_port_handler(0x61, outb_speaker);
}