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.
13 //usage:#define flash_eraseall_trivial_usage
14 //usage: "[-jNq] MTD_DEVICE"
15 //usage:#define flash_eraseall_full_usage "\n\n"
16 //usage: "Erase an MTD device\n"
17 //usage: "\n -j Format the device for jffs2"
18 //usage: "\n -N Don't skip bad blocks"
19 //usage: "\n -q Don't display progress messages"
22 #include <mtd/mtd-user.h>
23 #include <linux/jffs2.h>
25 #define OPTION_J (1 << 0)
26 #define OPTION_N (1 << 1)
27 #define OPTION_Q (1 << 2)
28 #define IS_NAND (1 << 3)
30 /* mtd/jffs2-user.h used to have this atrocity:
31 extern int target_endian;
33 #define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
34 #define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
36 #define cpu_to_je16(x) ((jint16_t){t16(x)})
37 #define cpu_to_je32(x) ((jint32_t){t32(x)})
38 #define cpu_to_jemode(x) ((jmode_t){t32(x)})
40 #define je16_to_cpu(x) (t16((x).v16))
41 #define je32_to_cpu(x) (t32((x).v32))
42 #define jemode_to_cpu(x) (t32((x).m))
44 but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
47 /* We always use native endianness */
50 #define cpu_to_je16(v) ((jint16_t){(v)})
51 #define cpu_to_je32(v) ((jint32_t){(v)})
53 static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
55 printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
56 (unsigned)meminfo->erasesize / 1024,
58 (unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
63 int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
64 int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
66 struct jffs2_unknown_node cleanmarker;
68 int fd, clmpos, clmlen;
74 opt_complementary = "=1";
75 flags = getopt32(argv, "jNq");
77 mtd_name = argv[optind];
78 fd = xopen(mtd_name, O_RDWR);
80 if (!S_ISCHR(st.st_mode))
81 bb_error_msg_and_die("%s: not a char device", mtd_name);
83 xioctl(fd, MEMGETINFO, &meminfo);
84 erase.length = meminfo.erasesize;
85 if (meminfo.type == MTD_NANDFLASH)
90 if (flags & OPTION_J) {
91 uint32_t *crc32_table;
93 crc32_table = crc32_filltable(NULL, 0);
95 cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
96 cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
97 if (!(flags & IS_NAND))
98 cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
100 struct nand_oobinfo oobinfo;
102 xioctl(fd, MEMGETOOBSEL, &oobinfo);
104 /* Check for autoplacement */
105 if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
106 /* Get the position of the free bytes */
107 clmpos = oobinfo.oobfree[0][0];
108 clmlen = oobinfo.oobfree[0][1];
112 bb_error_msg_and_die("autoplacement selected and no empty space in oob");
115 switch (meminfo.oobsize) {
130 cleanmarker.totlen = cpu_to_je32(8);
133 cleanmarker.hdr_crc = cpu_to_je32(
134 crc32_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
138 /* Don't want to destroy progress indicator by bb_error_msg's */
139 applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
141 for (erase.start = 0; erase.start < meminfo.size;
142 erase.start += meminfo.erasesize) {
143 if (!(flags & OPTION_N)) {
145 loff_t offset = erase.start;
147 ret = ioctl(fd, MEMGETBADBLOCK, &offset);
149 if (!(flags & OPTION_Q))
150 printf("\nSkipping bad block at 0x%08x\n", erase.start);
154 /* Black block table is not available on certain flash
157 if (errno == EOPNOTSUPP) {
160 bb_error_msg_and_die("bad block check not available");
162 bb_perror_msg_and_die("MEMGETBADBLOCK error");
167 if (!(flags & OPTION_Q))
168 show_progress(&meminfo, &erase);
170 xioctl(fd, MEMERASE, &erase);
172 /* format for JFFS2 ? */
173 if (!(flags & OPTION_J))
176 /* write cleanmarker */
177 if (flags & IS_NAND) {
178 struct mtd_oob_buf oob;
180 oob.ptr = (unsigned char *) &cleanmarker;
181 oob.start = erase.start + clmpos;
183 xioctl(fd, MEMWRITEOOB, &oob);
185 xlseek(fd, erase.start, SEEK_SET);
186 /* if (lseek(fd, erase.start, SEEK_SET) < 0) {
187 bb_perror_msg("MTD %s failure", "seek");
190 xwrite(fd, &cleanmarker, sizeof(cleanmarker));
191 /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
192 bb_perror_msg("MTD %s failure", "write");
196 if (!(flags & OPTION_Q))
197 printf(" Cleanmarker written at %x.", erase.start);
199 if (!(flags & OPTION_Q)) {
200 show_progress(&meminfo, &erase);
204 if (ENABLE_FEATURE_CLEAN_UP)