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mtd: add support for bad blocks in NAND flash

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NAND flash is very likely to contain bad blocks.

Currently, mtd and therefore sysupgrade fails when it encounters a single bad block, potentially leaving an unbootable system.

This patch allows the mtd utility to skip bad blocks in NAND flash and complete sysupgrade successfully.

Patch by: Matthew Redfearn <matt.redfearn@nxp.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 40021
This commit is contained in:
Felix Fietkau
2014-03-26 10:50:09 +00:00
parent 0555ebf66d
commit 608f4fe3b0
3 changed files with 56 additions and 5 deletions
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package/system/mtd/src/mtd.h
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@@ -15,6 +15,7 @@ extern int erasesize;
extern int mtd_open(const char *mtd, bool block);
extern int mtd_check_open(const char *mtd);
extern int mtd_block_is_bad(int fd, int offset);
extern int mtd_erase_block(int fd, int offset);
extern int mtd_write_buffer(int fd, const char *buf, int offset, int length);
extern int mtd_write_jffs2(const char *mtd, const char *filename, const char *dir);