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authorPeter Denison <openwrt@marshadder.org>2008-05-16 19:25:20 +0000
committerPeter Denison <openwrt@marshadder.org>2008-05-16 19:25:20 +0000
commit79aed699d71b9f583762a4b184bb7a68521dccb9 (patch)
tree74aaab10bc8d14ea76857a0ea17fc31419d255e9 /target/linux/generic-2.6/files-2.6.25/fs/yaffs2/yaffs_ecc.h
parent9788ab458ceb294131f6145eba79dfd01e380ffc (diff)
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Remove files now present upstream in files-2.6.25 (This is mostly just drivers/ssb and include/linux/ssb) [brcm47xx] Regenerate patches against 2.6.25.1 kernel+files set Default is still to build against 2.6.23.16
SVN-Revision: 11155
Diffstat (limited to 'target/linux/generic-2.6/files-2.6.25/fs/yaffs2/yaffs_ecc.h')
-rw-r--r--target/linux/generic-2.6/files-2.6.25/fs/yaffs2/yaffs_ecc.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/files-2.6.25/fs/yaffs2/yaffs_ecc.h b/target/linux/generic-2.6/files-2.6.25/fs/yaffs2/yaffs_ecc.h
new file mode 100644
index 0000000..40fd02b
--- /dev/null
+++ b/target/linux/generic-2.6/files-2.6.25/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