rename target/linux/generic-2.6 to generic

[15.05/openwrt.git] / target / linux / generic / files / fs / yaffs2 / yaffs_nand.c

diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_nand.c b/target/linux/generic/files/fs/yaffs2/yaffs_nand.c
new file mode 100644 (file)
index 0000000..4e25033
--- /dev/null
+++ b/target/linux/generic/files/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);
+}
+
+
+