diff options
Diffstat (limited to 'release/src/router/busybox/miscutils/flash_eraseall.c')
| -rw-r--r-- | release/src/router/busybox/miscutils/flash_eraseall.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/release/src/router/busybox/miscutils/flash_eraseall.c b/release/src/router/busybox/miscutils/flash_eraseall.c new file mode 100644 index 00000000..3e0c06ff --- /dev/null +++ b/release/src/router/busybox/miscutils/flash_eraseall.c @@ -0,0 +1,194 @@ +/* vi: set sw=4 ts=4: */ +/* eraseall.c -- erase the whole of a MTD device + * + * Ported to busybox from mtd-utils. + * + * Copyright (C) 2000 Arcom Control System Ltd + * + * Renamed to flash_eraseall.c + * + * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. + */ + +#include "libbb.h" +#include <mtd/mtd-user.h> +#include <mtd/jffs2-user.h> + +#define OPTION_J (1 << 0) +#define OPTION_Q (1 << 1) +#define IS_NAND (1 << 2) +#define BBTEST (1 << 3) + +struct globals { + /* This is used in the cpu_to_je/je_to_cpu macros in jffs2_user.h */ + int tgt_endian; +}; +#define G (*(struct globals*)&bb_common_bufsiz1) +#define target_endian (G.tgt_endian) +#define INIT_G() do { \ + target_endian = __BYTE_ORDER; \ +} while (0) + +static uint32_t crc32(uint32_t val, const void *ss, int len, + uint32_t *crc32_table) +{ + const unsigned char *s = ss; + while (--len >= 0) + val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8); + return val; +} + +static void show_progress(mtd_info_t *meminfo, erase_info_t *erase) +{ + printf("\rErasing %d Kibyte @ %x -- %2llu %% complete.", + (unsigned)meminfo->erasesize / 1024, erase->start, + (unsigned long long) erase->start * 100 / meminfo->size); + fflush(stdout); +} + +int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int flash_eraseall_main(int argc UNUSED_PARAM, char **argv) +{ + struct jffs2_unknown_node cleanmarker; + mtd_info_t meminfo; + int fd, clmpos, clmlen; + erase_info_t erase; + struct stat st; + unsigned int flags; + char *mtd_name; + + INIT_G(); + opt_complementary = "=1"; + flags = BBTEST | getopt32(argv, "jq"); + + mtd_name = argv[optind]; + xstat(mtd_name, &st); + if (!S_ISCHR(st.st_mode)) + bb_error_msg_and_die("%s: not a char device", mtd_name); + + fd = xopen(mtd_name, O_RDWR); + + xioctl(fd, MEMGETINFO, &meminfo); + erase.length = meminfo.erasesize; + if (meminfo.type == MTD_NANDFLASH) + flags |= IS_NAND; + + clmpos = 0; + clmlen = 8; + if (flags & OPTION_J) { + uint32_t *crc32_table; + + crc32_table = crc32_filltable(NULL, 0); + + cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); + cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER); + if (!(flags & IS_NAND)) + cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node)); + else { + struct nand_oobinfo oobinfo; + + xioctl(fd, MEMGETOOBSEL, &oobinfo); + + /* Check for autoplacement */ + if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) { + /* Get the position of the free bytes */ + clmpos = oobinfo.oobfree[0][0]; + clmlen = oobinfo.oobfree[0][1]; + if (clmlen > 8) + clmlen = 8; + if (clmlen == 0) + bb_error_msg_and_die("Autoplacement selected and no empty space in oob"); + } else { + /* Legacy mode */ + switch (meminfo.oobsize) { + case 8: + clmpos = 6; + clmlen = 2; + break; + case 16: + clmpos = 8; + /*clmlen = 8;*/ + break; + case 64: + clmpos = 16; + /*clmlen = 8;*/ + break; + } + } + cleanmarker.totlen = cpu_to_je32(8); + } + + cleanmarker.hdr_crc = cpu_to_je32(crc32(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, + crc32_table)); + } + + /* Don't want to destroy progress indicator by bb_error_msg's */ + applet_name = xasprintf("\n%s: %s", applet_name, mtd_name); + + for (erase.start = 0; erase.start < meminfo.size; + erase.start += meminfo.erasesize) { + if (flags & BBTEST) { + int ret; + loff_t offset = erase.start; + + ret = ioctl(fd, MEMGETBADBLOCK, &offset); + if (ret > 0) { + if (!(flags & OPTION_Q)) + bb_info_msg("\nSkipping bad block at 0x%08x", erase.start); + continue; + } + if (ret < 0) { + /* Black block table is not available on certain flash + * types e.g. NOR + */ + if (errno == EOPNOTSUPP) { + flags &= ~BBTEST; + if (flags & IS_NAND) + bb_error_msg_and_die("bad block check not available"); + } else { + bb_perror_msg_and_die("MEMGETBADBLOCK error"); + } + } + } + + if (!(flags & OPTION_Q)) + show_progress(&meminfo, &erase); + + xioctl(fd, MEMERASE, &erase); + + /* format for JFFS2 ? */ + if (!(flags & OPTION_J)) + continue; + + /* write cleanmarker */ + if (flags & IS_NAND) { + struct mtd_oob_buf oob; + + oob.ptr = (unsigned char *) &cleanmarker; + oob.start = erase.start + clmpos; + oob.length = clmlen; + xioctl(fd, MEMWRITEOOB, &oob); + } else { + xlseek(fd, erase.start, SEEK_SET); + /* if (lseek(fd, erase.start, SEEK_SET) < 0) { + bb_perror_msg("MTD %s failure", "seek"); + continue; + } */ + xwrite(fd, &cleanmarker, sizeof(cleanmarker)); + /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) { + bb_perror_msg("MTD %s failure", "write"); + continue; + } */ + } + if (!(flags & OPTION_Q)) + printf(" Cleanmarker written at %x.", erase.start); + } + if (!(flags & OPTION_Q)) { + show_progress(&meminfo, &erase); + bb_putchar('\n'); + } + + if (ENABLE_FEATURE_CLEAN_UP) + close(fd); + return EXIT_SUCCESS; +} |