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Diffstat (limited to 'fs/yaffs2/yaffs_nand.c')
-rw-r--r--fs/yaffs2/yaffs_nand.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c
new file mode 100644
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+++ b/fs/yaffs2/yaffs_nand.c
@@ -0,0 +1,134 @@
+/*
+ * 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 General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+const char *yaffs_nand_c_version =
+ "$Id: yaffs_nand.c,v 1.7 2007/02/14 01:09:06 wookey Exp $";
+
+#include "yaffs_nand.h"
+#include "yaffs_tagscompat.h"
+#include "yaffs_tagsvalidity.h"
+
+
+int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
+ __u8 * buffer,
+ yaffs_ExtendedTags * tags)
+{
+ int result;
+ yaffs_ExtendedTags localTags;
+
+ int realignedChunkInNAND = chunkInNAND - dev->chunkOffset;
+
+ /* If there are no tags provided, use local tags to get prioritised gc working */
+ if(!tags)
+ tags = &localTags;
+
+ if (dev->readChunkWithTagsFromNAND)
+ result = dev->readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer,
+ tags);
+ else
+ result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev,
+ realignedChunkInNAND,
+ buffer,
+ tags);
+ if(tags &&
+ tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR){
+
+ yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->nChunksPerBlock);
+ yaffs_HandleChunkError(dev,bi);
+ }
+
+ return result;
+}
+
+int yaffs_WriteChunkWithTagsToNAND(yaffs_Device * dev,
+ int chunkInNAND,
+ const __u8 * buffer,
+ yaffs_ExtendedTags * tags)
+{
+ chunkInNAND -= dev->chunkOffset;
+
+
+ if (tags) {
+ tags->sequenceNumber = dev->sequenceNumber;
+ tags->chunkUsed = 1;
+ if (!yaffs_ValidateTags(tags)) {
+ T(YAFFS_TRACE_ERROR,
+ (TSTR("Writing uninitialised tags" TENDSTR)));
+ YBUG();
+ }
+ T(YAFFS_TRACE_WRITE,
+ (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND,
+ tags->objectId, tags->chunkId));
+ } else {
+ T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
+ YBUG();
+ }
+
+ if (dev->writeChunkWithTagsToNAND)
+ return dev->writeChunkWithTagsToNAND(dev, chunkInNAND, buffer,
+ tags);
+ else
+ return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev,
+ chunkInNAND,
+ buffer,
+ tags);
+}
+
+int yaffs_MarkBlockBad(yaffs_Device * dev, int blockNo)
+{
+ blockNo -= dev->blockOffset;
+
+;
+ if (dev->markNANDBlockBad)
+ return dev->markNANDBlockBad(dev, blockNo);
+ else
+ return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo);
+}
+
+int yaffs_QueryInitialBlockState(yaffs_Device * dev,
+ int blockNo,
+ yaffs_BlockState * state,
+ unsigned *sequenceNumber)
+{
+ blockNo -= dev->blockOffset;
+
+ if (dev->queryNANDBlock)
+ return dev->queryNANDBlock(dev, blockNo, state, sequenceNumber);
+ else
+ return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo,
+ state,
+ sequenceNumber);
+}
+
+
+int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev,
+ int blockInNAND)
+{
+ int result;
+
+ blockInNAND -= dev->blockOffset;
+
+
+ dev->nBlockErasures++;
+ result = dev->eraseBlockInNAND(dev, blockInNAND);
+
+ return result;
+}
+
+int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev)
+{
+ return dev->initialiseNAND(dev);
+}
+
+
+