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/*
* cherry picked from mtd-utils
*
* Copyright (C) 2000 Arcom Control System Ltd
*
* 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
*
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <zlib.h>
#include <mtd/mtd-abi.h>
#include <mtd/jffs2-user.h>
#include "u_boot.h"
int target_endian = __BYTE_ORDER;
int mtd_erase_all(const char *mtd_device, int jffs2)
{
int fd;
struct mtd_info_user meminfo;
struct erase_info_user erase;
int clmpos = 0;
int clmlen = 8;
int isNAND;
int bbtest = 1;
struct jffs2_unknown_node cleanmarker;
if ((fd = open(mtd_device, O_RDWR)) < 0) {
error("%s: %s", mtd_device, strerror(errno));
close(fd);
return false;
}
if (ioctl(fd, MEMGETINFO, &meminfo) != 0) {
error("%s: unable to get MTD device info", mtd_device);
close(fd);
return false;
}
erase.length = meminfo.erasesize;
isNAND = meminfo.type == MTD_NANDFLASH ? 1 : 0;
if (jffs2) {
cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
if (!isNAND)
cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
else {
struct nand_oobinfo oobinfo;
if (ioctl(fd, MEMGETOOBSEL, &oobinfo) != 0) {
error("%s: unable to get NAND oobinfo", mtd_device);
close(fd);
return false;
}
/* Check for autoplacement */
if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
/* Get the position of the free bytes */
if (!oobinfo.oobfree[0][1]) {
error("Eeep. Autoplacement selected and no empty space in oob");
close(fd);
return false;
}
clmpos = oobinfo.oobfree[0][0];
clmlen = oobinfo.oobfree[0][1];
if (clmlen > 8)
clmlen = 8;
} else {
/* Legacy mode */
switch (meminfo.oobsize) {
case 8:
clmpos = 6;
clmlen = 2;
break;
case 16:
clmpos = 8;
clmlen = 8;
break;
case 64:
clmpos = 16;
clmlen = 8;
break;
}
}
cleanmarker.totlen = cpu_to_je32(8);
}
cleanmarker.hdr_crc= cpu_to_je32(crc32(0, (unsigned char *) &cleanmarker, sizeof(struct jffs2_unknown_node) - 4));
}
for (erase.start = 0; erase.start < meminfo.size; erase.start += meminfo.erasesize) {
if (bbtest) {
loff_t offset = erase.start;
int ret = ioctl(fd, MEMGETBADBLOCK, &offset);
if (ret > 0) {
dbg("Skipping bad block at 0x%08x", erase.start);
continue;
} else if (ret < 0) {
if (errno == EOPNOTSUPP) {
bbtest = 0;
if (isNAND) {
error("%s: Bad block check not available", mtd_device);
close(fd);
return false;
}
} else {
error("%s: MTD get bad block failed: %s", mtd_device, strerror(errno));
close(fd);
return false;
}
}
}
if (ioctl(fd, MEMERASE, &erase) != 0) {
error("%s: MTD Erase failure: %s", mtd_device, strerror(errno));
continue;
}
/* format for JFFS2 ? */
if (!jffs2)
continue;
/* write cleanmarker */
if (isNAND) {
struct mtd_oob_buf oob;
oob.ptr = (unsigned char *) &cleanmarker;
oob.start = erase.start + clmpos;
oob.length = clmlen;
if (ioctl(fd, MEMWRITEOOB, &oob) != 0) {
error("%s: MTD writeoob failure: %s", mtd_device, strerror(errno));
continue;
}
} else {
if (lseek(fd, erase.start, SEEK_SET) < 0) {
error("%s: MTD lseek failure: %s", mtd_device, strerror(errno));
continue;
}
if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
error("%s: MTD write failure: %s", mtd_device, strerror(errno));
continue;
}
}
dbg("Cleanmarker written at %x.", erase.start);
}
close(fd);
return true;
}
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