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/*
slbl backlight utility for Sharp Zaurus
version 1.0
Copyright 2004 Michael 'Mickey' Lauer <mickey@Vanille.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <string.h>
#define SHARP_FL_IOCTL_DEVICE "/dev/sharp_fl"
#define SHARP_FL_IOCTL_ON 1
#define SHARP_FL_IOCTL_OFF 2
#define SHARP_FL_IOCTL_STEP_CONTRAST 100
#define SHARP_FL_IOCTL_GET_STEP_CONTRAST 101
#define SHARP_FL_IOCTL_GET_STEP 102
int main(int argc, char *argv[])
{
int fd;
int steps;
int current;
int new;
fd = open( SHARP_FL_IOCTL_DEVICE, O_RDWR );
steps = ioctl( fd, SHARP_FL_IOCTL_GET_STEP, 0 );
if ( steps < 1 )
{
perror( "SHARP_FL_IOCTL_GET_STEP: ");
close( fd );
exit( 1 );
}
current = ioctl( fd, SHARP_FL_IOCTL_GET_STEP_CONTRAST, 0 );
if (argc < 2)
{
printf( "Current backlight setting = %d / %d\n", current, steps-1 );
}
else if (strcmp(argv[1], "on") == 0)
{
ioctl( fd, SHARP_FL_IOCTL_ON, 0 );
}
else if (strcmp(argv[1], "off") == 0)
{
ioctl( fd, SHARP_FL_IOCTL_OFF, 0 );
}
else if (sscanf(argv[1], "%d", &new) == 1)
{
printf( "Setting backlight to %d\n", new );
ioctl( fd, SHARP_FL_IOCTL_STEP_CONTRAST, new );
}
else
{
printf( "Usage:\n%s [on|off|<num>]\n", argv[0]);
exit(1);
}
close( fd );
return 0;
}
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