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This change retains "or later" state! No licensing _changes_ here, only form is adjusted (article, space between "GPL" and "v2" and so on). Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
208 lines
5.2 KiB
C
208 lines
5.2 KiB
C
/* vi: set sw=4 ts=4: */
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/* eraseall.c -- erase the whole of a MTD device
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*
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* Ported to busybox from mtd-utils.
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*
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* Copyright (C) 2000 Arcom Control System Ltd
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*
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* Renamed to flash_eraseall.c
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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#include <mtd/mtd-user.h>
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#include <linux/jffs2.h>
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#define OPTION_J (1 << 0)
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#define OPTION_Q (1 << 1)
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#define IS_NAND (1 << 2)
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#define BBTEST (1 << 3)
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/* mtd/jffs2-user.h used to have this atrocity:
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extern int target_endian;
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#define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
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#define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
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#define cpu_to_je16(x) ((jint16_t){t16(x)})
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#define cpu_to_je32(x) ((jint32_t){t32(x)})
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#define cpu_to_jemode(x) ((jmode_t){t32(x)})
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#define je16_to_cpu(x) (t16((x).v16))
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#define je32_to_cpu(x) (t32((x).v32))
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#define jemode_to_cpu(x) (t32((x).m))
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but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
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*/
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/* We always use native endianness */
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#undef cpu_to_je16
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#undef cpu_to_je32
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#define cpu_to_je16(v) ((jint16_t){(v)})
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#define cpu_to_je32(v) ((jint32_t){(v)})
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static uint32_t crc32(uint32_t val, const void *ss, int len,
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uint32_t *crc32_table)
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{
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const unsigned char *s = ss;
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while (--len >= 0)
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val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
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return val;
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}
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static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
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{
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printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
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(unsigned)meminfo->erasesize / 1024,
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erase->start,
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(unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
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);
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fflush_all();
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}
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int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
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{
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struct jffs2_unknown_node cleanmarker;
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mtd_info_t meminfo;
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int fd, clmpos, clmlen;
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erase_info_t erase;
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struct stat st;
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unsigned int flags;
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char *mtd_name;
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opt_complementary = "=1";
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flags = BBTEST | getopt32(argv, "jq");
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mtd_name = argv[optind];
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fd = xopen(mtd_name, O_RDWR);
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fstat(fd, &st);
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if (!S_ISCHR(st.st_mode))
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bb_error_msg_and_die("%s: not a char device", mtd_name);
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xioctl(fd, MEMGETINFO, &meminfo);
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erase.length = meminfo.erasesize;
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if (meminfo.type == MTD_NANDFLASH)
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flags |= IS_NAND;
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clmpos = 0;
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clmlen = 8;
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if (flags & OPTION_J) {
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uint32_t *crc32_table;
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crc32_table = crc32_filltable(NULL, 0);
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cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
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cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
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if (!(flags & IS_NAND))
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cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
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else {
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struct nand_oobinfo oobinfo;
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xioctl(fd, MEMGETOOBSEL, &oobinfo);
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/* Check for autoplacement */
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if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
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/* Get the position of the free bytes */
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clmpos = oobinfo.oobfree[0][0];
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clmlen = oobinfo.oobfree[0][1];
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if (clmlen > 8)
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clmlen = 8;
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if (clmlen == 0)
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bb_error_msg_and_die("autoplacement selected and no empty space in oob");
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} else {
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/* Legacy mode */
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switch (meminfo.oobsize) {
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case 8:
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clmpos = 6;
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clmlen = 2;
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break;
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case 16:
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clmpos = 8;
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/*clmlen = 8;*/
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break;
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case 64:
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clmpos = 16;
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/*clmlen = 8;*/
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break;
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}
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}
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cleanmarker.totlen = cpu_to_je32(8);
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}
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cleanmarker.hdr_crc = cpu_to_je32(crc32(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4,
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crc32_table));
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}
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/* Don't want to destroy progress indicator by bb_error_msg's */
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applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
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for (erase.start = 0; erase.start < meminfo.size;
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erase.start += meminfo.erasesize) {
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if (flags & BBTEST) {
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int ret;
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loff_t offset = erase.start;
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ret = ioctl(fd, MEMGETBADBLOCK, &offset);
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if (ret > 0) {
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if (!(flags & OPTION_Q))
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bb_info_msg("\nSkipping bad block at 0x%08x", erase.start);
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continue;
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}
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if (ret < 0) {
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/* Black block table is not available on certain flash
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* types e.g. NOR
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*/
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if (errno == EOPNOTSUPP) {
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flags &= ~BBTEST;
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if (flags & IS_NAND)
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bb_error_msg_and_die("bad block check not available");
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} else {
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bb_perror_msg_and_die("MEMGETBADBLOCK error");
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}
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}
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}
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if (!(flags & OPTION_Q))
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show_progress(&meminfo, &erase);
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xioctl(fd, MEMERASE, &erase);
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/* format for JFFS2 ? */
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if (!(flags & OPTION_J))
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continue;
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/* write cleanmarker */
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if (flags & IS_NAND) {
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struct mtd_oob_buf oob;
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oob.ptr = (unsigned char *) &cleanmarker;
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oob.start = erase.start + clmpos;
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oob.length = clmlen;
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xioctl(fd, MEMWRITEOOB, &oob);
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} else {
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xlseek(fd, erase.start, SEEK_SET);
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/* if (lseek(fd, erase.start, SEEK_SET) < 0) {
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bb_perror_msg("MTD %s failure", "seek");
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continue;
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} */
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xwrite(fd, &cleanmarker, sizeof(cleanmarker));
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/* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
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bb_perror_msg("MTD %s failure", "write");
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continue;
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} */
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}
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if (!(flags & OPTION_Q))
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printf(" Cleanmarker written at %x.", erase.start);
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}
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if (!(flags & OPTION_Q)) {
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show_progress(&meminfo, &erase);
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bb_putchar('\n');
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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close(fd);
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return EXIT_SUCCESS;
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}
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