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- /* 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 source tree.
- */
- //usage:#define flash_eraseall_trivial_usage
- //usage: "[-jNq] MTD_DEVICE"
- //usage:#define flash_eraseall_full_usage "\n\n"
- //usage: "Erase an MTD device\n"
- //usage: "\n -j Format the device for jffs2"
- //usage: "\n -N Don't skip bad blocks"
- //usage: "\n -q Don't display progress messages"
- #include "libbb.h"
- #include <mtd/mtd-user.h>
- #include <linux/jffs2.h>
- #define OPTION_J (1 << 0)
- #define OPTION_N (1 << 1)
- #define OPTION_Q (1 << 2)
- #define IS_NAND (1 << 3)
- /* mtd/jffs2-user.h used to have this atrocity:
- extern int target_endian;
- #define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
- #define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
- #define cpu_to_je16(x) ((jint16_t){t16(x)})
- #define cpu_to_je32(x) ((jint32_t){t32(x)})
- #define cpu_to_jemode(x) ((jmode_t){t32(x)})
- #define je16_to_cpu(x) (t16((x).v16))
- #define je32_to_cpu(x) (t32((x).v32))
- #define jemode_to_cpu(x) (t32((x).m))
- but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
- */
- /* We always use native endianness */
- #undef cpu_to_je16
- #undef cpu_to_je32
- #define cpu_to_je16(v) ((jint16_t){(v)})
- #define cpu_to_je32(v) ((jint32_t){(v)})
- static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
- {
- printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
- (unsigned)meminfo->erasesize / 1024,
- erase->start,
- (unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
- );
- fflush_all();
- }
- 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;
- opt_complementary = "=1";
- flags = getopt32(argv, "jNq");
- mtd_name = argv[optind];
- fd = xopen(mtd_name, O_RDWR);
- fstat(fd, &st);
- if (!S_ISCHR(st.st_mode))
- bb_error_msg_and_die("%s: not a char device", mtd_name);
- 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_block_endian0(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 & OPTION_N)) {
- int ret;
- loff_t offset = erase.start;
- ret = ioctl(fd, MEMGETBADBLOCK, &offset);
- if (ret > 0) {
- if (!(flags & OPTION_Q))
- printf("\nSkipping bad block at 0x%08x\n", erase.start);
- continue;
- }
- if (ret < 0) {
- /* Black block table is not available on certain flash
- * types e.g. NOR
- */
- if (errno == EOPNOTSUPP) {
- flags |= OPTION_N;
- 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;
- }
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