1 /* vi: set sw=4 ts=4: */
2 /* eraseall.c -- erase the whole of a MTD device
4 * Ported to busybox from mtd-utils.
6 * Copyright (C) 2000 Arcom Control System Ltd
8 * Renamed to flash_eraseall.c
10 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
14 #include <mtd/mtd-user.h>
15 #include <mtd/jffs2-user.h>
17 #define OPTION_J (1 << 0)
18 #define OPTION_Q (1 << 1)
19 #define IS_NAND (1 << 2)
20 #define BBTEST (1 << 3)
23 /* This is used in the cpu_to_je/je_to_cpu macros in jffs2_user.h */
26 #define G (*(struct globals*)&bb_common_bufsiz1)
27 #define target_endian (G.tgt_endian)
28 #define INIT_G() do { \
29 target_endian = __BYTE_ORDER; \
32 static uint32_t crc32(uint32_t val, const void *ss, int len,
33 uint32_t *crc32_table)
35 const unsigned char *s = ss;
37 val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
41 static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
43 printf("\rErasing %d Kibyte @ %x -- %2llu %% complete.",
44 (unsigned)meminfo->erasesize / 1024, erase->start,
45 (unsigned long long) erase->start * 100 / meminfo->size);
49 int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
50 int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
52 struct jffs2_unknown_node cleanmarker;
54 int fd, clmpos, clmlen;
61 opt_complementary = "=1";
62 flags = BBTEST | getopt32(argv, "jq");
64 mtd_name = argv[optind];
66 if (!S_ISCHR(st.st_mode))
67 bb_error_msg_and_die("%s: not a char device", mtd_name);
69 fd = xopen(mtd_name, O_RDWR);
71 xioctl(fd, MEMGETINFO, &meminfo);
72 erase.length = meminfo.erasesize;
73 if (meminfo.type == MTD_NANDFLASH)
78 if (flags & OPTION_J) {
79 uint32_t *crc32_table;
81 crc32_table = crc32_filltable(NULL, 0);
83 cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
84 cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
85 if (!(flags & IS_NAND))
86 cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
88 struct nand_oobinfo oobinfo;
90 xioctl(fd, MEMGETOOBSEL, &oobinfo);
92 /* Check for autoplacement */
93 if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
94 /* Get the position of the free bytes */
95 clmpos = oobinfo.oobfree[0][0];
96 clmlen = oobinfo.oobfree[0][1];
100 bb_error_msg_and_die("autoplacement selected and no empty space in oob");
103 switch (meminfo.oobsize) {
118 cleanmarker.totlen = cpu_to_je32(8);
121 cleanmarker.hdr_crc = cpu_to_je32(crc32(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4,
125 /* Don't want to destroy progress indicator by bb_error_msg's */
126 applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
128 for (erase.start = 0; erase.start < meminfo.size;
129 erase.start += meminfo.erasesize) {
130 if (flags & BBTEST) {
132 loff_t offset = erase.start;
134 ret = ioctl(fd, MEMGETBADBLOCK, &offset);
136 if (!(flags & OPTION_Q))
137 bb_info_msg("\nSkipping bad block at 0x%08x", erase.start);
141 /* Black block table is not available on certain flash
144 if (errno == EOPNOTSUPP) {
147 bb_error_msg_and_die("bad block check not available");
149 bb_perror_msg_and_die("MEMGETBADBLOCK error");
154 if (!(flags & OPTION_Q))
155 show_progress(&meminfo, &erase);
157 xioctl(fd, MEMERASE, &erase);
159 /* format for JFFS2 ? */
160 if (!(flags & OPTION_J))
163 /* write cleanmarker */
164 if (flags & IS_NAND) {
165 struct mtd_oob_buf oob;
167 oob.ptr = (unsigned char *) &cleanmarker;
168 oob.start = erase.start + clmpos;
170 xioctl(fd, MEMWRITEOOB, &oob);
172 xlseek(fd, erase.start, SEEK_SET);
173 /* if (lseek(fd, erase.start, SEEK_SET) < 0) {
174 bb_perror_msg("MTD %s failure", "seek");
177 xwrite(fd, &cleanmarker, sizeof(cleanmarker));
178 /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
179 bb_perror_msg("MTD %s failure", "write");
183 if (!(flags & OPTION_Q))
184 printf(" Cleanmarker written at %x.", erase.start);
186 if (!(flags & OPTION_Q)) {
187 show_progress(&meminfo, &erase);
191 if (ENABLE_FEATURE_CLEAN_UP)