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Diffstat (limited to 'fs/yaffs2/yaffs_mtdif2.c')
-rw-r--r--fs/yaffs2/yaffs_mtdif2.c257
1 files changed, 257 insertions, 0 deletions
diff --git a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c
new file mode 100644
index 000000000000..c1d447819970
--- /dev/null
+++ b/fs/yaffs2/yaffs_mtdif2.c
@@ -0,0 +1,257 @@
+/*
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
+ *
+ * Copyright (C) 2002-2010 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.
+ */
+
+/* mtd interface for YAFFS2 */
+
+#include "yportenv.h"
+#include "yaffs_trace.h"
+
+#include "yaffs_mtdif2.h"
+
+#include "linux/mtd/mtd.h"
+#include "linux/types.h"
+#include "linux/time.h"
+
+#include "yaffs_packedtags2.h"
+
+#include "yaffs_linux.h"
+
+/* NB For use with inband tags....
+ * We assume that the data buffer is of size totalBytersPerChunk so that we can also
+ * use it to load the tags.
+ */
+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND,
+ const __u8 *data,
+ const yaffs_ExtendedTags *tags)
+{
+ struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ struct mtd_oob_ops ops;
+#else
+ size_t dummy;
+#endif
+ int retval = 0;
+
+ loff_t addr;
+
+ yaffs_PackedTags2 pt;
+
+ int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
+ void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t : (void *)&pt;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
+ TENDSTR), chunkInNAND, data, tags));
+
+
+ addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
+
+ /* For yaffs2 writing there must be both data and tags.
+ * If we're using inband tags, then the tags are stuffed into
+ * the end of the data buffer.
+ */
+ if (!data || !tags)
+ BUG();
+ else if (dev->param.inbandTags) {
+ yaffs_PackedTags2TagsPart *pt2tp;
+ pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
+ yaffs_PackTags2TagsPart(pt2tp, tags);
+ } else
+ yaffs_PackTags2(&pt, tags, !dev->param.noTagsECC);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooblen = (dev->param.inbandTags) ? 0 : packed_tags_size;
+ ops.len = dev->param.totalBytesPerChunk;
+ ops.ooboffs = 0;
+ ops.datbuf = (__u8 *)data;
+ ops.oobbuf = (dev->param.inbandTags) ? NULL : packed_tags_ptr;
+ retval = mtd->write_oob(mtd, addr, &ops);
+
+#else
+ if (!dev->param.inbandTags) {
+ retval =
+ mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
+ &dummy, data, (__u8 *) packed_tags_ptr, NULL);
+ } else {
+ retval =
+ mtd->write(mtd, addr, dev->param.totalBytesPerChunk, &dummy,
+ data);
+ }
+#endif
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND,
+ __u8 *data, yaffs_ExtendedTags *tags)
+{
+ struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ struct mtd_oob_ops ops;
+#endif
+ size_t dummy;
+ int retval = 0;
+ int localData = 0;
+
+ loff_t addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk;
+
+ yaffs_PackedTags2 pt;
+
+ int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt);
+ void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t: (void *)&pt;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
+ TENDSTR), chunkInNAND, data, tags));
+
+ if (dev->param.inbandTags) {
+
+ if (!data) {
+ localData = 1;
+ data = yaffs_GetTempBuffer(dev, __LINE__);
+ }
+
+
+ }
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ if (dev->param.inbandTags || (data && !tags))
+ retval = mtd->read(mtd, addr, dev->param.totalBytesPerChunk,
+ &dummy, data);
+ else if (tags) {
+ ops.mode = MTD_OOB_AUTO;
+ ops.ooblen = packed_tags_size;
+ ops.len = data ? dev->nDataBytesPerChunk : packed_tags_size;
+ ops.ooboffs = 0;
+ ops.datbuf = data;
+ ops.oobbuf = yaffs_DeviceToContext(dev)->spareBuffer;
+ retval = mtd->read_oob(mtd, addr, &ops);
+ }
+#else
+ if (!dev->param.inbandTags && data && tags) {
+
+ retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
+ &dummy, data, dev->spareBuffer,
+ NULL);
+ } else {
+ if (data)
+ retval =
+ mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
+ data);
+ if (!dev->param.inbandTags && tags)
+ retval =
+ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
+ dev->spareBuffer);
+ }
+#endif
+
+
+ if (dev->param.inbandTags) {
+ if (tags) {
+ yaffs_PackedTags2TagsPart *pt2tp;
+ pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
+ yaffs_UnpackTags2TagsPart(tags, pt2tp);
+ }
+ } else {
+ if (tags) {
+ memcpy(packed_tags_ptr, yaffs_DeviceToContext(dev)->spareBuffer, packed_tags_size);
+ yaffs_UnpackTags2(tags, &pt, !dev->param.noTagsECC);
+ }
+ }
+
+ if (localData)
+ yaffs_ReleaseTempBuffer(dev, data, __LINE__);
+
+ if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
+ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
+ dev->eccUnfixed++;
+ }
+ if(tags && retval == -EUCLEAN && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) {
+ tags->eccResult = YAFFS_ECC_RESULT_FIXED;
+ dev->eccFixed++;
+ }
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+{
+ struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
+ int retval;
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
+
+ retval =
+ mtd->block_markbad(mtd,
+ blockNo * dev->param.nChunksPerBlock *
+ dev->param.totalBytesPerChunk);
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+
+}
+
+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+ yaffs_BlockState *state, __u32 *sequenceNumber)
+{
+ struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd;
+ int retval;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
+ retval =
+ mtd->block_isbad(mtd,
+ blockNo * dev->param.nChunksPerBlock *
+ dev->param.totalBytesPerChunk);
+
+ if (retval) {
+ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
+
+ *state = YAFFS_BLOCK_STATE_DEAD;
+ *sequenceNumber = 0;
+ } else {
+ yaffs_ExtendedTags t;
+ nandmtd2_ReadChunkWithTagsFromNAND(dev,
+ blockNo *
+ dev->param.nChunksPerBlock, NULL,
+ &t);
+
+ if (t.chunkUsed) {
+ *sequenceNumber = t.sequenceNumber;
+ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
+ } else {
+ *sequenceNumber = 0;
+ *state = YAFFS_BLOCK_STATE_EMPTY;
+ }
+ }
+ T(YAFFS_TRACE_MTD,
+ (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
+ *state));
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-03 14:09:00 +0000