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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2024 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <string.h>
#include <errno.h>
#ifdef HAVE_SYS_IO_H
#include <sys/io.h>
#endif /* HAVE_SYS_IO_H */
#include "log.h"
#include "ports.h"
int
enablePorts (int errorLevel, unsigned short int base, unsigned short int count) {
#ifdef HAVE_SYS_IO_H
if (ioperm(base, count, 1) != -1) return 1;
logMessage(errorLevel, "Port enable error: %u.%u: %s", base, count, strerror(errno));
#else /* HAVE_SYS_IO_H */
logMessage(errorLevel, "I/O ports not supported.");
#endif /* HAVE_SYS_IO_H */
return 0;
}
int
disablePorts (unsigned short int base, unsigned short int count) {
#ifdef HAVE_SYS_IO_H
if (ioperm(base, count, 0) != -1) return 1;
logMessage(LOG_ERR, "Port disable error: %u.%u: %s", base, count, strerror(errno));
#endif /* HAVE_SYS_IO_H */
return 0;
}
unsigned char
readPort1 (unsigned short int port) {
#ifdef HAVE_SYS_IO_H
return inb(port);
#else /* HAVE_SYS_IO_H */
return 0;
#endif /* HAVE_SYS_IO_H */
}
void
writePort1 (unsigned short int port, unsigned char value) {
#ifdef HAVE_SYS_IO_H
outb(value, port);
#endif /* HAVE_SYS_IO_H */
}
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