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/*
* FILE flash_lock.c
*
* This utility locks one or more sectors of flash device.
*
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <time.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <string.h>
#include <mtd/mtd-user.h>
int main(int argc, char *argv[])
{
int fd;
struct mtd_info_user mtdInfo;
struct erase_info_user mtdLockInfo;
int num_sectors;
int ofs;
/*
* Parse command line options
*/
if(argc != 4)
{
fprintf(stderr, "USAGE: %s <mtd device> <ofs in hex> <num of sectors in decimal or -1 for all sectors>\n", argv[0]);
exit(1);
}
else if(strncmp(argv[1], "/dev/mtd", 8) != 0)
{
fprintf(stderr, "'%s' is not a MTD device. Must specify mtd device: /dev/mtd?\n", argv[1]);
exit(1);
}
fd = open(argv[1], O_RDWR);
if(fd < 0)
{
fprintf(stderr, "Could not open mtd device: %s\n", argv[1]);
exit(1);
}
if(ioctl(fd, MEMGETINFO, &mtdInfo))
{
fprintf(stderr, "Could not get MTD device info from %s\n", argv[1]);
close(fd);
exit(1);
}
sscanf(argv[2], "%x",&ofs);
sscanf(argv[3], "%d",&num_sectors);
if(ofs > mtdInfo.size - mtdInfo.erasesize)
{
fprintf(stderr, "%x is beyond device size %x\n",ofs,(unsigned int)(mtdInfo.size - mtdInfo.erasesize));
exit(1);
}
if (num_sectors == -1) {
num_sectors = mtdInfo.size/mtdInfo.erasesize;
}
else {
if(num_sectors > mtdInfo.size/mtdInfo.erasesize)
{
fprintf(stderr, "%d are too many sectors, device only has %d\n",num_sectors,(int)(mtdInfo.size/mtdInfo.erasesize));
exit(1);
}
}
mtdLockInfo.start = ofs;
mtdLockInfo.length = (num_sectors - 1) * mtdInfo.erasesize;
if(ioctl(fd, MEMLOCK, &mtdLockInfo))
{
fprintf(stderr, "Could not lock MTD device: %s\n", argv[1]);
close(fd);
exit(1);
}
return 0;
}
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