--- /dev/null
+/* eraseall.c -- erase the whole of a MTD device
+
+ Ported to busybox from mtd-utils.
+
+ Copyright (C) 2000 Arcom Control System Ltd
+
+ Renamed to flash_eraseall.c
+
+ 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 "libbb.h"
+
+#include <mtd/mtd-user.h>
+#include <mtd/jffs2-user.h>
+
+#define OPTION_J (1 << 0)
+#define OPTION_Q (1 << 1)
+
+int target_endian = __BYTE_ORDER;
+
+static uint32_t crc32(uint32_t val, const void *ss, int len,
+ uint32_t *crc32_table)
+{
+ const unsigned char *s = ss;
+ while (--len >= 0)
+ val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
+ return val;
+}
+
+static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
+{
+ printf("\rErasing %d Kibyte @ %x -- %2llu %% complete.",
+ meminfo->erasesize / 1024, erase->start,
+ (unsigned long long) erase->start * 100 / meminfo->size);
+ fflush(stdout);
+}
+
+int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int flash_eraseall_main(int argc, char **argv)
+{
+ struct jffs2_unknown_node cleanmarker;
+ mtd_info_t meminfo;
+ int fd, clmpos = 0, clmlen = 8;
+ erase_info_t erase;
+ struct stat st;
+ int isNAND, bbtest = 1;
+ unsigned int flags;
+ char *mtd_name;
+
+ opt_complementary = "=1";
+ flags = getopt32(argv, "jq");
+
+ mtd_name = *(argv + optind);
+ xstat(mtd_name, &st);
+ if (!S_ISCHR(st.st_mode))
+ bb_error_msg_and_die("%s: not a char device", mtd_name);
+
+ fd = xopen(mtd_name, O_RDWR);
+
+ xioctl(fd, MEMGETINFO, &meminfo);
+
+ erase.length = meminfo.erasesize;
+ isNAND = meminfo.type == MTD_NANDFLASH ? 1 : 0;
+
+ if (flags & OPTION_J) {
+ uint32_t *crc32_table;
+
+ crc32_table = crc32_filltable(NULL, 0);
+
+ 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;
+
+ xioctl(fd, MEMGETOOBSEL, &oobinfo);
+
+ /* Check for autoplacement */
+ if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
+ /* Get the position of the free bytes */
+ if (!oobinfo.oobfree[0][1])
+ bb_error_msg_and_die("Autoplacement selected and no empty space in oob");
+
+ 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, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4,
+ crc32_table));
+ }
+
+ for (erase.start = 0; erase.start < meminfo.size;
+ erase.start += meminfo.erasesize) {
+ if (bbtest) {
+ int ret;
+
+ loff_t offset = erase.start;
+ ret = ioctl(fd, MEMGETBADBLOCK, &offset);
+ if (ret > 0) {
+ if (!(flags & OPTION_Q))
+ bb_info_msg("\nSkipping bad block at 0x%08x", erase.start);
+ continue;
+ } else if (ret < 0) {
+ /* Black block table is not available on certain flash
+ * types e.g. NOR
+ */
+ if (errno == EOPNOTSUPP) {
+ bbtest = 0;
+ if (isNAND)
+ bb_error_msg_and_die("%s: Bad block check not available",
+ mtd_name);
+ } else {
+ bb_error_msg_and_die("\n%s: MTD get bad block failed: %s",
+ mtd_name, strerror(errno));
+ }
+ }
+ }
+
+ if (!(flags & OPTION_Q))
+ show_progress(&meminfo, &erase);
+
+ xioctl(fd, MEMERASE, &erase);
+
+ /* format for JFFS2 ? */
+ if (!(flags & OPTION_J))
+ continue;
+
+ /* write cleanmarker */
+ if (isNAND) {
+ struct mtd_oob_buf oob;
+ oob.ptr = (unsigned char *) &cleanmarker;
+ oob.start = erase.start + clmpos;
+ oob.length = clmlen;
+ xioctl (fd, MEMWRITEOOB, &oob);
+ } else {
+ if (lseek (fd, erase.start, SEEK_SET) < 0) {
+ bb_error_msg("\n%s: MTD lseek failure: %s", mtd_name, strerror(errno));
+ continue;
+ }
+ if (write (fd , &cleanmarker, sizeof (cleanmarker)) != sizeof (cleanmarker)) {
+ bb_error_msg("\n%s: MTD write failure: %s", mtd_name, strerror(errno));
+ continue;
+ }
+ }
+ if (!(flags & OPTION_Q))
+ printf(" Cleanmarker written at %x.", erase.start);
+ }
+ if (!(flags & OPTION_Q)) {
+ show_progress(&meminfo, &erase);
+ printf("\n");
+ }
+
+ return EXIT_SUCCESS;
+}
projects / platform / upstream / busybox.git / commitdiff