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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) 1995-2014 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version. Please see the file LICENSE-GPL for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <sys/ioctl.h>
#include <linux/kd.h>
#include "log.h"
#include "device.h"
#include "beep.h"
#include "system_linux.h"
#define BEEP_DIVIDEND 1193180
static void
enableBeeps (void) {
static unsigned char status = 0;
installKernelModule("pcspkr", &status);
}
int
canBeep (void) {
enableBeeps();
return !!getConsole();
}
int
synchronousBeep (unsigned short frequency, unsigned short milliseconds) {
return 0;
}
int
asynchronousBeep (unsigned short frequency, unsigned short milliseconds) {
FILE *console = getConsole();
if (console) {
if (ioctl(fileno(console), KDMKTONE, ((milliseconds << 0X10) | (BEEP_DIVIDEND / frequency))) != -1) return 1;
logSystemError("ioctl KDMKTONE");
}
return 0;
}
int
startBeep (unsigned short frequency) {
FILE *console = getConsole();
if (console) {
if (ioctl(fileno(console), KIOCSOUND, BEEP_DIVIDEND/frequency) != -1) return 1;
logSystemError("ioctl KIOCSOUND");
}
return 0;
}
int
stopBeep (void) {
FILE *console = getConsole();
if (console) {
if (ioctl(fileno(console), KIOCSOUND, 0) != -1) return 1;
logSystemError("ioctl KIOCSOUND");
}
return 0;
}
void
endBeep (void) {
}
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