int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev,
int blockNo, yaffs_BlockState *
state,
int *sequenceNumber)
{
yaffs_Spare spare0, spare1;
static yaffs_Spare spareFF;
static int init;
yaffs_ECCResult dummy;
if (!init) {
memset(&spareFF, 0xFF, sizeof(spareFF));
init = 1;
}
*sequenceNumber = 0;
yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock, NULL,
&spare0, &dummy, 1);
yaffs_ReadChunkFromNAND(dev, blockNo * dev->nChunksPerBlock + 1, NULL,
&spare1, &dummy, 1);
if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7)
*state = YAFFS_BLOCK_STATE_DEAD;
else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0)
*state = YAFFS_BLOCK_STATE_EMPTY;
else
*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
return YAFFS_OK;
}
int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device * dev,
int chunkInNAND,
__u8 * data,
yaffs_ExtendedTags * eTags)
{
#ifdef DEBUG_YAFFS2
printk("yaffs_TagsCompatabilityReadChunkWithTagsFromNAND\n");
#endif
yaffs_Spare spare;
yaffs_Tags tags;
yaffs_ECCResult eccResult;
static yaffs_Spare spareFF;
static int init;
if (!init) {
memset(&spareFF, 0xFF, sizeof(spareFF));
init = 1;
}
if (yaffs_ReadChunkFromNAND
(dev, chunkInNAND, data, &spare, &eccResult, 1)) {
/* eTags may be NULL */
if (eTags) {
int deleted =
(yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0;
eTags->chunkDeleted = deleted;
eTags->eccResult = eccResult;
eTags->blockBad = 0; /* We're reading it */
/* therefore it is not a bad block */
eTags->chunkUsed =
(memcmp(&spareFF, &spare, sizeof(spareFF)) !=
0) ? 1 : 0;
if (eTags->chunkUsed) {
yaffs_GetTagsFromSpare(dev, &spare, &tags);
eTags->objectId = tags.objectId;
eTags->chunkId = tags.chunkId;
eTags->byteCount = tags.byteCount;
eTags->serialNumber = tags.serialNumber;
}
}
return YAFFS_OK;
} else {
return YAFFS_FAIL;
}
}
