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/*
* flash_{lock,unlock}
*
* utilities for locking/unlocking sectors of flash devices
*/
#ifndef PROGRAM_NAME
#define PROGRAM_NAME "flash_unlock"
#define FLASH_MSG "unlock"
#define FLASH_UNLOCK 1
#else
#define FLASH_MSG "lock"
#define FLASH_UNLOCK 0
#endif
#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 "common.h"
#include <mtd/mtd-user.h>
static void usage(int status)
{
fprintf(status ? stderr : stdout,
"Usage: %s <mtd device> [offset] [block count]\n\n"
"If offset is not specified, it defaults to 0.\n"
"If block count is not specified, it defaults to all blocks.\n",
PROGRAM_NAME);
exit(status);
}
int main(int argc, char *argv[])
{
int fd, request;
struct mtd_info_user mtdInfo;
struct erase_info_user mtdLockInfo;
int count;
const char *dev;
/* Parse command line options */
if (argc < 2 || argc > 4)
usage(1);
if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
usage(0);
dev = argv[1];
/* Get the device info to compare to command line sizes */
fd = open(dev, O_RDWR);
if (fd < 0)
sys_errmsg_die("could not open: %s", dev);
if (ioctl(fd, MEMGETINFO, &mtdInfo))
sys_errmsg_die("could not get mtd info: %s", dev);
/* Make sure user options are valid */
if (argc > 2)
mtdLockInfo.start = strtol(argv[2], NULL, 0);
else
mtdLockInfo.start = 0;
if (mtdLockInfo.start > mtdInfo.size)
errmsg_die("%#x is beyond device size %#x",
mtdLockInfo.start, mtdInfo.size);
if (argc > 3) {
count = strtol(argv[3], NULL, 0);
if (count == -1)
mtdLockInfo.length = mtdInfo.size - mtdInfo.erasesize;
else
mtdLockInfo.length = mtdInfo.erasesize * count;
} else
mtdLockInfo.length = mtdInfo.size - mtdInfo.erasesize;
if (mtdLockInfo.start + mtdLockInfo.length > mtdInfo.size)
errmsg_die("range is more than device supports: %#x + %#x > %#x",
mtdLockInfo.start, mtdLockInfo.length, mtdInfo.size);
/* Finally do the operation */
request = FLASH_UNLOCK ? MEMUNLOCK : MEMLOCK;
if (ioctl(fd, request, &mtdLockInfo))
sys_errmsg_die("could not %s device: %s\n",
FLASH_MSG, dev);
return 0;
}
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