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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <errno.h>
#include "flashlogo.h"
int flashsize(void)
{
int fd = 0;
int size = 0;
fd = open("/dev/nwflash", O_RDONLY);
if (fd <= 0)
return FLASH_EACCES;
if (lseek(fd, 4*1024*1024, SEEK_SET) > 0)
size = 4*1024*1024;
else if (lseek(fd, 1024*1024, SEEK_SET) > 0)
size = 1024*1024;
else size = FLASH_EBADSIZE;
close(fd);
return size;
}
int flashread(char *buffer, int offset, int size)
{
int fd = 0;
int ret;
fd = open("/dev/nwflash", O_RDONLY);
if (fd <= 0)
return FLASH_EACCES;
if (lseek(fd, offset, SEEK_SET) < 0)
return FLASH_EBADOFF;
ret = read(fd, buffer, size);
close(fd);
return ret;
}
int flashwrite(char *buffer, int offset, int size)
{
int fd = 0;
int ret;
fd = open("/dev/nwflash", O_RDWR);
if (fd <= 0)
return FLASH_EACCES;
if (lseek(fd, offset, SEEK_SET) < 0)
return FLASH_EBADOFF;
ioctl(fd, CMD_WRITE_ENABLE);
ret = write(fd, buffer, size);
ioctl(fd, CMD_WRITE_DISABLE);
close(fd);
return ret;
}
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