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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 <getopt.h>
#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 [options] [--] <mtd device> [offset [block count]]\n"
"\n"
"Options:\n"
" -h --help Display this help and exit\n"
" --version Display version information and exit\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);
}
static const char short_opts[] = "h";
static const struct option long_opts[] = {
{ "help", no_argument, 0, 'h' },
{ "version", no_argument, 0, 'v' },
{ NULL, 0, 0, 0 },
};
/* Program arguments */
static const char *dev, *offs_s, *count_s;
static void process_args(int argc, char *argv[])
{
int arg_idx;
for (;;) {
int c;
c = getopt_long(argc, argv, short_opts, long_opts, NULL);
if (c == EOF)
break;
switch (c) {
case 'h':
usage(0);
break;
case 'v':
common_print_version();
exit(0);
default:
usage(1);
break;
}
}
arg_idx = optind;
/* Sanity checks */
if (argc - arg_idx < 1) {
errmsg("too few arguments");
usage(1);
} else if (argc - arg_idx > 3) {
errmsg("too many arguments");
usage(1);
}
/* First non-option argument */
dev = argv[arg_idx++];
/* Second non-option argument */
if (arg_idx < argc)
offs_s = argv[arg_idx++];
else
offs_s = NULL;
/* Third non-option argument */
if (arg_idx < argc)
count_s = argv[arg_idx++];
else
count_s = NULL;
}
int main(int argc, char *argv[])
{
int fd, request;
struct mtd_info_user mtdInfo;
struct erase_info_user mtdLockInfo;
int count;
process_args(argc, argv);
/* 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 (offs_s)
mtdLockInfo.start = strtol(offs_s, NULL, 0);
else
mtdLockInfo.start = 0;
if (mtdLockInfo.start > mtdInfo.size)
errmsg_die("%#x is beyond device size %#x",
mtdLockInfo.start, mtdInfo.size);
if (count_s) {
count = strtol(count_s, NULL, 0);
if (count == -1)
mtdLockInfo.length = mtdInfo.size;
else
mtdLockInfo.length = mtdInfo.erasesize * count;
} else
mtdLockInfo.length = mtdInfo.size;
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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