source: MondoRescue/branches/3.3/mindi-busybox/miscutils/flash_eraseall.c@ 3621

Last change on this file since 3621 was 3621, checked in by Bruno Cornec, 7 years ago

New 3?3 banch for incorporation of latest busybox 1.25. Changing minor version to handle potential incompatibilities.
  • Property svn:eol-style set to native
File size: 5.3 KB
Line 
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
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"
20
21#include "libbb.h"
22#include <mtd/mtd-user.h>
23#include <linux/jffs2.h>
24
25#define OPTION_J (1 << 0)
26#define OPTION_N (1 << 1)
27#define OPTION_Q (1 << 2)
28#define IS_NAND (1 << 3)
29
30/* mtd/jffs2-user.h used to have this atrocity:
31extern int target_endian;
32
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); })
35
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)})
39
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))
43
44but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
45*/
46
47/* We always use native endianness */
48#undef cpu_to_je16
49#undef cpu_to_je32
50#define cpu_to_je16(v) ((jint16_t){(v)})
51#define cpu_to_je32(v) ((jint32_t){(v)})
52
53static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
54{
55 printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
56 (unsigned)meminfo->erasesize / 1024,
57 erase->start,
58 (unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
59 );
60 fflush_all();
61}
62
63int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
64int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
65{
66 struct jffs2_unknown_node cleanmarker;
67 mtd_info_t meminfo;
68 int fd, clmpos, clmlen;
69 erase_info_t erase;
70 struct stat st;
71 unsigned int flags;
72 char *mtd_name;
73
74 opt_complementary = "=1";
75 flags = getopt32(argv, "jNq");
76
77 mtd_name = argv[optind];
78 fd = xopen(mtd_name, O_RDWR);
79 fstat(fd, &st);
80 if (!S_ISCHR(st.st_mode))
81 bb_error_msg_and_die("%s: not a char device", mtd_name);
82
83 xioctl(fd, MEMGETINFO, &meminfo);
84 erase.length = meminfo.erasesize;
85 if (meminfo.type == MTD_NANDFLASH)
86 flags |= IS_NAND;
87
88 clmpos = 0;
89 clmlen = 8;
90 if (flags & OPTION_J) {
91 uint32_t *crc32_table;
92
93 crc32_table = crc32_filltable(NULL, 0);
94
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));
99 else {
100 struct nand_oobinfo oobinfo;
101
102 xioctl(fd, MEMGETOOBSEL, &oobinfo);
103
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];
109 if (clmlen > 8)
110 clmlen = 8;
111 if (clmlen == 0)
112 bb_error_msg_and_die("autoplacement selected and no empty space in oob");
113 } else {
114 /* Legacy mode */
115 switch (meminfo.oobsize) {
116 case 8:
117 clmpos = 6;
118 clmlen = 2;
119 break;
120 case 16:
121 clmpos = 8;
122 /*clmlen = 8;*/
123 break;
124 case 64:
125 clmpos = 16;
126 /*clmlen = 8;*/
127 break;
128 }
129 }
130 cleanmarker.totlen = cpu_to_je32(8);
131 }
132
133 cleanmarker.hdr_crc = cpu_to_je32(
134 crc32_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
135 );
136 }
137
138 /* Don't want to destroy progress indicator by bb_error_msg's */
139 applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
140
141 for (erase.start = 0; erase.start < meminfo.size;
142 erase.start += meminfo.erasesize) {
143 if (!(flags & OPTION_N)) {
144 int ret;
145 loff_t offset = erase.start;
146
147 ret = ioctl(fd, MEMGETBADBLOCK, &offset);
148 if (ret > 0) {
149 if (!(flags & OPTION_Q))
150 printf("\nSkipping bad block at 0x%08x\n", erase.start);
151 continue;
152 }
153 if (ret < 0) {
154 /* Black block table is not available on certain flash
155 * types e.g. NOR
156 */
157 if (errno == EOPNOTSUPP) {
158 flags |= OPTION_N;
159 if (flags & IS_NAND)
160 bb_error_msg_and_die("bad block check not available");
161 } else {
162 bb_perror_msg_and_die("MEMGETBADBLOCK error");
163 }
164 }
165 }
166
167 if (!(flags & OPTION_Q))
168 show_progress(&meminfo, &erase);
169
170 xioctl(fd, MEMERASE, &erase);
171
172 /* format for JFFS2 ? */
173 if (!(flags & OPTION_J))
174 continue;
175
176 /* write cleanmarker */
177 if (flags & IS_NAND) {
178 struct mtd_oob_buf oob;
179
180 oob.ptr = (unsigned char *) &cleanmarker;
181 oob.start = erase.start + clmpos;
182 oob.length = clmlen;
183 xioctl(fd, MEMWRITEOOB, &oob);
184 } else {
185 xlseek(fd, erase.start, SEEK_SET);
186 /* if (lseek(fd, erase.start, SEEK_SET) < 0) {
187 bb_perror_msg("MTD %s failure", "seek");
188 continue;
189 } */
190 xwrite(fd, &cleanmarker, sizeof(cleanmarker));
191 /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
192 bb_perror_msg("MTD %s failure", "write");
193 continue;
194 } */
195 }
196 if (!(flags & OPTION_Q))
197 printf(" Cleanmarker written at %x.", erase.start);
198 }
199 if (!(flags & OPTION_Q)) {
200 show_progress(&meminfo, &erase);
201 bb_putchar('\n');
202 }
203
204 if (ENABLE_FEATURE_CLEAN_UP)
205 close(fd);
206 return EXIT_SUCCESS;
207}
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