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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id: lcd-bitmap.c 29248 2011-02-08 20:05:25Z thomasjfox $
*
* Copyright (C) 2011 Lorenzo Miori, Thomas Martitz
*
* 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
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include "string.h"
#include <linux/fb.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include "file.h"
#include "debug.h"
#include "system.h"
#include "screendump.h"
#include "lcd.h"
static int dev_fd = 0;
fb_data *dev_fb = 0;
void lcd_shutdown(void)
{
printf("FB closed.");
munmap(dev_fb, sizeof(lcd_framebuffer));
close(dev_fd);
}
void lcd_init_device(void)
{
size_t screensize;
struct fb_var_screeninfo vinfo;
struct fb_fix_screeninfo finfo;
/* Open the framebuffer device */
dev_fd = open("/dev/fb0", O_RDWR);
if (dev_fd == -1) {
perror("Error: cannot open framebuffer device");
exit(1);
}
printf("The framebuffer device was opened successfully.\n");
/* Get the fixed properties */
if (ioctl(dev_fd, FBIOGET_FSCREENINFO, &finfo) == -1) {
perror("Error reading fixed information");
exit(2);
}
/* Now we get the settable settings, and we set 16 bit bpp */
if (ioctl(dev_fd, FBIOGET_VSCREENINFO, &vinfo) == -1) {
perror("Error reading variable information");
exit(3);
}
vinfo.bits_per_pixel = 16;
if (ioctl(dev_fd, FBIOPUT_VSCREENINFO, &vinfo)) {
perror("fbset(ioctl)");
exit(4);
}
printf("%dx%d, %dbpp\n", vinfo.xres, vinfo.yres, vinfo.bits_per_pixel);
/* Figure out the size of the screen in bytes */
screensize = vinfo.xres * vinfo.yres * vinfo.bits_per_pixel / 8;
if (screensize != sizeof(lcd_framebuffer))
{
exit(4);
perror("Display and framebuffer mismatch!\n");
}
/* Map the device to memory */
dev_fb = mmap(0, screensize, PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, 0);
if ((int)dev_fb == -1) {
perror("Error: failed to map framebuffer device to memory");
exit(4);
}
printf("The framebuffer device was mapped to memory successfully.\n");
}
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