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 source tree.
14 #include <mtd/mtd-user.h>
15 #include <linux/jffs2.h>
17 #define OPTION_J (1 << 0)
18 #define OPTION_Q (1 << 1)
19 #define IS_NAND (1 << 2)
20 #define BBTEST (1 << 3)
22 /* mtd/jffs2-user.h used to have this atrocity:
23 extern int target_endian;
25 #define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
26 #define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
28 #define cpu_to_je16(x) ((jint16_t){t16(x)})
29 #define cpu_to_je32(x) ((jint32_t){t32(x)})
30 #define cpu_to_jemode(x) ((jmode_t){t32(x)})
32 #define je16_to_cpu(x) (t16((x).v16))
33 #define je32_to_cpu(x) (t32((x).v32))
34 #define jemode_to_cpu(x) (t32((x).m))
36 but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
39 /* We always use native endianness */
42 #define cpu_to_je16(v) ((jint16_t){(v)})
43 #define cpu_to_je32(v) ((jint32_t){(v)})
45 static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
47 printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
48 (unsigned)meminfo->erasesize / 1024,
50 (unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
55 int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
56 int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
58 struct jffs2_unknown_node cleanmarker;
60 int fd, clmpos, clmlen;
66 opt_complementary = "=1";
67 flags = BBTEST | getopt32(argv, "jq");
69 mtd_name = argv[optind];
70 fd = xopen(mtd_name, O_RDWR);
72 if (!S_ISCHR(st.st_mode))
73 bb_error_msg_and_die("%s: not a char device", mtd_name);
75 xioctl(fd, MEMGETINFO, &meminfo);
76 erase.length = meminfo.erasesize;
77 if (meminfo.type == MTD_NANDFLASH)
82 if (flags & OPTION_J) {
83 uint32_t *crc32_table;
85 crc32_table = crc32_filltable(NULL, 0);
87 cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
88 cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
89 if (!(flags & IS_NAND))
90 cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
92 struct nand_oobinfo oobinfo;
94 xioctl(fd, MEMGETOOBSEL, &oobinfo);
96 /* Check for autoplacement */
97 if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
98 /* Get the position of the free bytes */
99 clmpos = oobinfo.oobfree[0][0];
100 clmlen = oobinfo.oobfree[0][1];
104 bb_error_msg_and_die("autoplacement selected and no empty space in oob");
107 switch (meminfo.oobsize) {
122 cleanmarker.totlen = cpu_to_je32(8);
125 cleanmarker.hdr_crc = cpu_to_je32(
126 crc32_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
130 /* Don't want to destroy progress indicator by bb_error_msg's */
131 applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
133 for (erase.start = 0; erase.start < meminfo.size;
134 erase.start += meminfo.erasesize) {
135 if (flags & BBTEST) {
137 loff_t offset = erase.start;
139 ret = ioctl(fd, MEMGETBADBLOCK, &offset);
141 if (!(flags & OPTION_Q))
142 bb_info_msg("\nSkipping bad block at 0x%08x", erase.start);
146 /* Black block table is not available on certain flash
149 if (errno == EOPNOTSUPP) {
152 bb_error_msg_and_die("bad block check not available");
154 bb_perror_msg_and_die("MEMGETBADBLOCK error");
159 if (!(flags & OPTION_Q))
160 show_progress(&meminfo, &erase);
162 xioctl(fd, MEMERASE, &erase);
164 /* format for JFFS2 ? */
165 if (!(flags & OPTION_J))
168 /* write cleanmarker */
169 if (flags & IS_NAND) {
170 struct mtd_oob_buf oob;
172 oob.ptr = (unsigned char *) &cleanmarker;
173 oob.start = erase.start + clmpos;
175 xioctl(fd, MEMWRITEOOB, &oob);
177 xlseek(fd, erase.start, SEEK_SET);
178 /* if (lseek(fd, erase.start, SEEK_SET) < 0) {
179 bb_perror_msg("MTD %s failure", "seek");
182 xwrite(fd, &cleanmarker, sizeof(cleanmarker));
183 /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
184 bb_perror_msg("MTD %s failure", "write");
188 if (!(flags & OPTION_Q))
189 printf(" Cleanmarker written at %x.", erase.start);
191 if (!(flags & OPTION_Q)) {
192 show_progress(&meminfo, &erase);
196 if (ENABLE_FEATURE_CLEAN_UP)