diff options
author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2008-09-29 01:08:17 +0000 |
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committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2008-09-29 01:08:17 +0000 |
commit | 5951d03bc4e55cc541795c60c10ee6be6eec4f23 (patch) | |
tree | cd04d6e88ffc7cca75a9ad1040caa9417253b4f7 /target/linux/generic-2.6/files-2.6.27/fs/yaffs2/yaffs_ecc.h | |
parent | a440b7b65593aaa45b388546baa88db842f33a92 (diff) |
port generic and ixp4xx kernel patches to 2.6.27 (compiles except for iptables, but otherwise completely untested)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12790 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/generic-2.6/files-2.6.27/fs/yaffs2/yaffs_ecc.h')
-rw-r--r-- | target/linux/generic-2.6/files-2.6.27/fs/yaffs2/yaffs_ecc.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/files-2.6.27/fs/yaffs2/yaffs_ecc.h b/target/linux/generic-2.6/files-2.6.27/fs/yaffs2/yaffs_ecc.h new file mode 100644 index 000000000..79bc3d117 --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.27/fs/yaffs2/yaffs_ecc.h @@ -0,0 +1,44 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2007 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + + /* + * This code implements the ECC algorithm used in SmartMedia. + * + * The ECC comprises 22 bits of parity information and is stuffed into 3 bytes. + * The two unused bit are set to 1. + * The ECC can correct single bit errors in a 256-byte page of data. Thus, two such ECC + * blocks are used on a 512-byte NAND page. + * + */ + +#ifndef __YAFFS_ECC_H__ +#define __YAFFS_ECC_H__ + +typedef struct { + unsigned char colParity; + unsigned lineParity; + unsigned lineParityPrime; +} yaffs_ECCOther; + +void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc); +int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, + const unsigned char *test_ecc); + +void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, + yaffs_ECCOther * ecc); +int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, + yaffs_ECCOther * read_ecc, + const yaffs_ECCOther * test_ecc); +#endif |