source: MondoRescue/branches/3.2/mindi-busybox/miscutils/flash_eraseall.c

Last change on this file was 3232, checked in by Bruno Cornec, 10 years ago
  • Update mindi-busybox to 1.21.1
  • 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: "[-jq] 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 -q Don't display progress messages"
19
20#include "libbb.h"
21#include <mtd/mtd-user.h>
22#include <linux/jffs2.h>
23
24#define OPTION_J (1 << 0)
25#define OPTION_Q (1 << 1)
26#define IS_NAND (1 << 2)
27#define BBTEST (1 << 3)
28
29/* mtd/jffs2-user.h used to have this atrocity:
30extern int target_endian;
31
32#define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
33#define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
34
35#define cpu_to_je16(x) ((jint16_t){t16(x)})
36#define cpu_to_je32(x) ((jint32_t){t32(x)})
37#define cpu_to_jemode(x) ((jmode_t){t32(x)})
38
39#define je16_to_cpu(x) (t16((x).v16))
40#define je32_to_cpu(x) (t32((x).v32))
41#define jemode_to_cpu(x) (t32((x).m))
42
43but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
44*/
45
46/* We always use native endianness */
47#undef cpu_to_je16
48#undef cpu_to_je32
49#define cpu_to_je16(v) ((jint16_t){(v)})
50#define cpu_to_je32(v) ((jint32_t){(v)})
51
52static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
53{
54 printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
55 (unsigned)meminfo->erasesize / 1024,
56 erase->start,
57 (unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
58 );
59 fflush_all();
60}
61
62int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
63int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
64{
65 struct jffs2_unknown_node cleanmarker;
66 mtd_info_t meminfo;
67 int fd, clmpos, clmlen;
68 erase_info_t erase;
69 struct stat st;
70 unsigned int flags;
71 char *mtd_name;
72
73 opt_complementary = "=1";
74 flags = BBTEST | getopt32(argv, "jq");
75
76 mtd_name = argv[optind];
77 fd = xopen(mtd_name, O_RDWR);
78 fstat(fd, &st);
79 if (!S_ISCHR(st.st_mode))
80 bb_error_msg_and_die("%s: not a char device", mtd_name);
81
82 xioctl(fd, MEMGETINFO, &meminfo);
83 erase.length = meminfo.erasesize;
84 if (meminfo.type == MTD_NANDFLASH)
85 flags |= IS_NAND;
86
87 clmpos = 0;
88 clmlen = 8;
89 if (flags & OPTION_J) {
90 uint32_t *crc32_table;
91
92 crc32_table = crc32_filltable(NULL, 0);
93
94 cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
95 cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
96 if (!(flags & IS_NAND))
97 cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
98 else {
99 struct nand_oobinfo oobinfo;
100
101 xioctl(fd, MEMGETOOBSEL, &oobinfo);
102
103 /* Check for autoplacement */
104 if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
105 /* Get the position of the free bytes */
106 clmpos = oobinfo.oobfree[0][0];
107 clmlen = oobinfo.oobfree[0][1];
108 if (clmlen > 8)
109 clmlen = 8;
110 if (clmlen == 0)
111 bb_error_msg_and_die("autoplacement selected and no empty space in oob");
112 } else {
113 /* Legacy mode */
114 switch (meminfo.oobsize) {
115 case 8:
116 clmpos = 6;
117 clmlen = 2;
118 break;
119 case 16:
120 clmpos = 8;
121 /*clmlen = 8;*/
122 break;
123 case 64:
124 clmpos = 16;
125 /*clmlen = 8;*/
126 break;
127 }
128 }
129 cleanmarker.totlen = cpu_to_je32(8);
130 }
131
132 cleanmarker.hdr_crc = cpu_to_je32(
133 crc32_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
134 );
135 }
136
137 /* Don't want to destroy progress indicator by bb_error_msg's */
138 applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
139
140 for (erase.start = 0; erase.start < meminfo.size;
141 erase.start += meminfo.erasesize) {
142 if (flags & BBTEST) {
143 int ret;
144 loff_t offset = erase.start;
145
146 ret = ioctl(fd, MEMGETBADBLOCK, &offset);
147 if (ret > 0) {
148 if (!(flags & OPTION_Q))
149 bb_info_msg("\nSkipping bad block at 0x%08x", erase.start);
150 continue;
151 }
152 if (ret < 0) {
153 /* Black block table is not available on certain flash
154 * types e.g. NOR
155 */
156 if (errno == EOPNOTSUPP) {
157 flags &= ~BBTEST;
158 if (flags & IS_NAND)
159 bb_error_msg_and_die("bad block check not available");
160 } else {
161 bb_perror_msg_and_die("MEMGETBADBLOCK error");
162 }
163 }
164 }
165
166 if (!(flags & OPTION_Q))
167 show_progress(&meminfo, &erase);
168
169 xioctl(fd, MEMERASE, &erase);
170
171 /* format for JFFS2 ? */
172 if (!(flags & OPTION_J))
173 continue;
174
175 /* write cleanmarker */
176 if (flags & IS_NAND) {
177 struct mtd_oob_buf oob;
178
179 oob.ptr = (unsigned char *) &cleanmarker;
180 oob.start = erase.start + clmpos;
181 oob.length = clmlen;
182 xioctl(fd, MEMWRITEOOB, &oob);
183 } else {
184 xlseek(fd, erase.start, SEEK_SET);
185 /* if (lseek(fd, erase.start, SEEK_SET) < 0) {
186 bb_perror_msg("MTD %s failure", "seek");
187 continue;
188 } */
189 xwrite(fd, &cleanmarker, sizeof(cleanmarker));
190 /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
191 bb_perror_msg("MTD %s failure", "write");
192 continue;
193 } */
194 }
195 if (!(flags & OPTION_Q))
196 printf(" Cleanmarker written at %x.", erase.start);
197 }
198 if (!(flags & OPTION_Q)) {
199 show_progress(&meminfo, &erase);
200 bb_putchar('\n');
201 }
202
203 if (ENABLE_FEATURE_CLEAN_UP)
204 close(fd);
205 return EXIT_SUCCESS;
206}
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