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/*
* erase, protect, unprotect - FLASH support
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/**
* @file
* @brief Flash memory support: erase, protect, unprotect
*/
#include <common.h>
#include <command.h>
#include <cfi_flash.h>
#include <errno.h>
#include <getopt.h>
#include <fs.h>
#include <fcntl.h>
#include <linux/stat.h>
static int do_flerase (cmd_tbl_t *cmdtp, int argc, char *argv[])
{
int fd;
char *filename = NULL;
struct stat s;
unsigned long start = 0, size = ~0;
int ret = 0;
if (argc == 1)
return COMMAND_ERROR_USAGE;
filename = argv[1];
if (stat(filename, &s)) {
printf("stat %s: %s\n", filename, errno_str());
return 1;
}
size = s.st_size;
if (!filename) {
printf("missing filename\n");
return 1;
}
fd = open(filename, O_WRONLY);
if (fd < 0) {
printf("open %s:", filename, errno_str());
return 1;
}
if (argc == 3 && parse_area_spec(argv[2], &start, &size)) {
printf("could not parse: %s\n", argv[optind]);
ret = 1;
goto out;
}
if (erase(fd, size, start)) {
perror("erase");
ret = 1;
}
out:
close(fd);
return ret;
}
static const __maybe_unused char cmd_erase_help[] =
"Usage: Erase <device> [area]\n"
"Erase a flash device or parts of a device if an area specification\n"
"is given\n";
U_BOOT_CMD_START(erase)
.cmd = do_flerase,
.usage = "erase FLASH memory",
U_BOOT_CMD_HELP(cmd_erase_help)
U_BOOT_CMD_END
/** @page erase_command erase Erase flash memory
*
* Usage is: erase \<devicee>
*
* Erase the flash memory behind the device. It depends on the device given,
* what area will be erased. If the device represents the whole flash memory
* the whole memory will be erased. If the device represents a partition on
* a main flash memory, only this partition part will be erased.
*
* Refer \b addpart, \b delpart and \b devinfo for partition handling.
*/
static int do_protect (cmd_tbl_t *cmdtp, int argc, char *argv[])
{
int fd;
char *filename = NULL;
struct stat s;
int prot = 1;
unsigned long start = 0, size = ~0;
int ret = 0, err;
if (argc == 1)
return COMMAND_ERROR_USAGE;
filename = argv[1];
if (*argv[0] == 'u')
prot = 0;
if (stat(filename, &s)) {
printf("stat %s: %s\n", filename, errno_str());
return 1;
}
size = s.st_size;
if (!filename) {
printf("missing filename\n");
return 1;
}
fd = open(filename, O_WRONLY);
if (fd < 0) {
printf("open %s:", filename, errno_str());
return 1;
}
if (argc == 3)
if (parse_area_spec(argv[2], &start, &size)) {
printf("could not parse: %s\n", argv[optind]);
ret = 1;
goto out;
}
err = protect(fd, size, start, prot);
if (err && err != -ENOSYS) {
perror("protect");
ret = 1;
goto out;
}
out:
close(fd);
return ret;
}
static const __maybe_unused char cmd_protect_help[] =
"Usage: (un)protect <device> [area]\n"
"(un)protect a flash device or parts of a device if an area specification\n"
"is given\n";
U_BOOT_CMD_START(protect)
.cmd = do_protect,
.usage = "enable FLASH write protection",
U_BOOT_CMD_HELP(cmd_protect_help)
U_BOOT_CMD_END
U_BOOT_CMD_START(unprotect)
.cmd = do_protect,
.usage = "disable FLASH write protection",
U_BOOT_CMD_HELP(cmd_protect_help)
U_BOOT_CMD_END
/** @page protect_command protect Protect a flash memory
*
* Usage is: protect \<devicee>
*
* Protect the flash memory behind the device. It depends on the device given,
* what area will be protected. If the device represents the whole flash memory
* the whole memory will be protected. If the device represents a partition on
* a main flash memory, only this partition part will be protected.
*
* Refer \b addpart, \b delpart and \b devinfo for partition handling.
*/
/** @page unprotect_command unprotect Unprotect a flash memory
*
* Usage is: unprotect \<devicee>
*
* Unprotect the flash memory behind the device. It depends on the device given,
* what area will be unprotected. If the device represents the whole flash memory
* the whole memory will be unprotected. If the device represents a partition
* on a main flash memory, only this partition part will be unprotected.
*
* Refer \b addpart, \b delpart and \b devinfo for partition handling.
*/
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