From 1e570a9288856bcd288a80115f2233c9c785706c Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sat, 18 Oct 2008 21:43:30 +0000 Subject: change the way ./files* and the generic kernel files are applied. ./files now applies to *ALL* kernel versions, and is copied along with ./files-* - this gets rid of quite a bit of redundancy in the extra kernel drivers. SVN-Revision: 13010 --- .../generic-2.6/files-2.6.23/fs/yaffs2/yaffs_ecc.h | 44 ++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 target/linux/generic-2.6/files-2.6.23/fs/yaffs2/yaffs_ecc.h (limited to 'target/linux/generic-2.6/files-2.6.23/fs/yaffs2/yaffs_ecc.h') diff --git a/target/linux/generic-2.6/files-2.6.23/fs/yaffs2/yaffs_ecc.h b/target/linux/generic-2.6/files-2.6.23/fs/yaffs2/yaffs_ecc.h new file mode 100644 index 0000000000..79bc3d1171 --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.23/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 + * + * 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 -- cgit v1.2.3