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path: root/miscutils/flash_eraseall.c (plain)
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1/* vi: set sw=4 ts=4: */
2/* eraseall.c -- erase the whole of a MTD device
3 *
4 * Ported to busybox from mtd-utils.
5 *
6 * Copyright (C) 2000 Arcom Control System Ltd
7 *
8 * Renamed to flash_eraseall.c
9 *
10 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
11 */
12//config:config FLASH_ERASEALL
13//config: bool "flash_eraseall"
14//config: default n # doesn't build on Ubuntu 8.04
15//config: help
16//config: The flash_eraseall binary from mtd-utils as of git head c4c6a59eb.
17//config: This utility is used to erase the whole MTD device.
18
19//applet:IF_FLASH_ERASEALL(APPLET(flash_eraseall, BB_DIR_USR_SBIN, BB_SUID_DROP))
20
21//kbuild:lib-$(CONFIG_FLASH_ERASEALL) += flash_eraseall.o
22
23//usage:#define flash_eraseall_trivial_usage
24//usage: "[-jNq] MTD_DEVICE"
25//usage:#define flash_eraseall_full_usage "\n\n"
26//usage: "Erase an MTD device\n"
27//usage: "\n -j Format the device for jffs2"
28//usage: "\n -N Don't skip bad blocks"
29//usage: "\n -q Don't display progress messages"
30
31#include "libbb.h"
32#include <mtd/mtd-user.h>
33#include <linux/jffs2.h>
34
35#define OPTION_J (1 << 0)
36#define OPTION_N (1 << 1)
37#define OPTION_Q (1 << 2)
38#define IS_NAND (1 << 3)
39
40/* mtd/jffs2-user.h used to have this atrocity:
41extern int target_endian;
42
43#define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
44#define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
45
46#define cpu_to_je16(x) ((jint16_t){t16(x)})
47#define cpu_to_je32(x) ((jint32_t){t32(x)})
48#define cpu_to_jemode(x) ((jmode_t){t32(x)})
49
50#define je16_to_cpu(x) (t16((x).v16))
51#define je32_to_cpu(x) (t32((x).v32))
52#define jemode_to_cpu(x) (t32((x).m))
53
54but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
55*/
56
57/* We always use native endianness */
58#undef cpu_to_je16
59#undef cpu_to_je32
60#define cpu_to_je16(v) ((jint16_t){(v)})
61#define cpu_to_je32(v) ((jint32_t){(v)})
62
63static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
64{
65 printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
66 (unsigned)meminfo->erasesize / 1024,
67 erase->start,
68 (unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
69 );
70 fflush_all();
71}
72
73int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
74int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
75{
76 struct jffs2_unknown_node cleanmarker;
77 mtd_info_t meminfo;
78 int fd, clmpos, clmlen;
79 erase_info_t erase;
80 struct stat st;
81 unsigned int flags;
82 char *mtd_name;
83
84 opt_complementary = "=1";
85 flags = getopt32(argv, "jNq");
86
87 mtd_name = argv[optind];
88 fd = xopen(mtd_name, O_RDWR);
89 fstat(fd, &st);
90 if (!S_ISCHR(st.st_mode))
91 bb_error_msg_and_die("%s: not a char device", mtd_name);
92
93 xioctl(fd, MEMGETINFO, &meminfo);
94 erase.length = meminfo.erasesize;
95 if (meminfo.type == MTD_NANDFLASH)
96 flags |= IS_NAND;
97
98 clmpos = 0;
99 clmlen = 8;
100 if (flags & OPTION_J) {
101 uint32_t *crc32_table;
102
103 crc32_table = crc32_filltable(NULL, 0);
104
105 cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
106 cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
107 if (!(flags & IS_NAND))
108 cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
109 else {
110 struct nand_oobinfo oobinfo;
111
112 xioctl(fd, MEMGETOOBSEL, &oobinfo);
113
114 /* Check for autoplacement */
115 if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
116 /* Get the position of the free bytes */
117 clmpos = oobinfo.oobfree[0][0];
118 clmlen = oobinfo.oobfree[0][1];
119 if (clmlen > 8)
120 clmlen = 8;
121 if (clmlen == 0)
122 bb_error_msg_and_die("autoplacement selected and no empty space in oob");
123 } else {
124 /* Legacy mode */
125 switch (meminfo.oobsize) {
126 case 8:
127 clmpos = 6;
128 clmlen = 2;
129 break;
130 case 16:
131 clmpos = 8;
132 /*clmlen = 8;*/
133 break;
134 case 64:
135 clmpos = 16;
136 /*clmlen = 8;*/
137 break;
138 }
139 }
140 cleanmarker.totlen = cpu_to_je32(8);
141 }
142
143 cleanmarker.hdr_crc = cpu_to_je32(
144 crc32_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
145 );
146 }
147
148 /* Don't want to destroy progress indicator by bb_error_msg's */
149 applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
150
151 for (erase.start = 0; erase.start < meminfo.size;
152 erase.start += meminfo.erasesize) {
153 if (!(flags & OPTION_N)) {
154 int ret;
155 loff_t offset = erase.start;
156
157 ret = ioctl(fd, MEMGETBADBLOCK, &offset);
158 if (ret > 0) {
159 if (!(flags & OPTION_Q))
160 printf("\nSkipping bad block at 0x%08x\n", erase.start);
161 continue;
162 }
163 if (ret < 0) {
164 /* Black block table is not available on certain flash
165 * types e.g. NOR
166 */
167 if (errno == EOPNOTSUPP) {
168 flags |= OPTION_N;
169 if (flags & IS_NAND)
170 bb_error_msg_and_die("bad block check not available");
171 } else {
172 bb_perror_msg_and_die("MEMGETBADBLOCK error");
173 }
174 }
175 }
176
177 if (!(flags & OPTION_Q))
178 show_progress(&meminfo, &erase);
179
180 xioctl(fd, MEMERASE, &erase);
181
182 /* format for JFFS2 ? */
183 if (!(flags & OPTION_J))
184 continue;
185
186 /* write cleanmarker */
187 if (flags & IS_NAND) {
188 struct mtd_oob_buf oob;
189
190 oob.ptr = (unsigned char *) &cleanmarker;
191 oob.start = erase.start + clmpos;
192 oob.length = clmlen;
193 xioctl(fd, MEMWRITEOOB, &oob);
194 } else {
195 xlseek(fd, erase.start, SEEK_SET);
196 /* if (lseek(fd, erase.start, SEEK_SET) < 0) {
197 bb_perror_msg("MTD %s failure", "seek");
198 continue;
199 } */
200 xwrite(fd, &cleanmarker, sizeof(cleanmarker));
201 /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
202 bb_perror_msg("MTD %s failure", "write");
203 continue;
204 } */
205 }
206 if (!(flags & OPTION_Q))
207 printf(" Cleanmarker written at %x.", erase.start);
208 }
209 if (!(flags & OPTION_Q)) {
210 show_progress(&meminfo, &erase);
211 bb_putchar('\n');
212 }
213
214 if (ENABLE_FEATURE_CLEAN_UP)
215 close(fd);
216 return EXIT_SUCCESS;
217}
218
generated by cgit at 2024-05-15 05:04:30 (GMT)