+/*
+ * YAFFS: Yet another FFS. A NAND-flash specific file system.
+ * yaffs_mtdif.c NAND mtd wrapper functions.
+ *
+ * Copyright (C) 2002 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 */
+
+const char *yaffs_mtdif2_c_version =
+ "$Id: yaffs_mtdif2.c,v 1.1 2006-05-25 01:37:27 charles Exp $";
+
+#include "yportenv.h"
+
+
+#include "yaffs_mtdif2.h"
+
+#include "linux/mtd/mtd.h"
+#include "linux/types.h"
+#include "linux/time.h"
+
+#include "yaffs_packedtags2.h"
+
+
+void nandmtd2_pt2buf(yaffs_Device *dev, yaffs_PackedTags2 *pt, int is_raw)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ __u8 *ptab = (__u8 *)pt; /* packed tags as bytes */
+
+ int i, j = 0, k, n;
+
+ /* Pack buffer with 0xff */
+ for (i = 0; i < mtd->oobsize; i++)
+ dev->spareBuffer[i] = 0xff;
+
+ if(!is_raw){
+ memcpy(dev->spareBuffer,pt,sizeof(yaffs_PackedTags2));
+ } else {
+ j = 0;
+ k = mtd->oobinfo.oobfree[j][0];
+ n = mtd->oobinfo.oobfree[j][1];
+
+ if (n == 0) {
+ T(YAFFS_TRACE_ERROR, (TSTR("No OOB space for tags" TENDSTR)));
+ YBUG();
+ }
+
+ for (i = 0; i < sizeof(yaffs_PackedTags2); i++) {
+ if (n == 0) {
+ j++;
+ k = mtd->oobinfo.oobfree[j][0];
+ n = mtd->oobinfo.oobfree[j][1];
+ if (n == 0) {
+ T(YAFFS_TRACE_ERROR, (TSTR("No OOB space for tags" TENDSTR)));
+ YBUG();
+ }
+ }
+ dev->spareBuffer[k] = ptab[i];
+ k++;
+ n--;
+ }
+ }
+
+}
+
+void nandmtd2_buf2pt(yaffs_Device *dev, yaffs_PackedTags2 *pt, int is_raw)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ int i, j = 0, k, n;
+ __u8 *ptab = (__u8 *)pt; /* packed tags as bytes */
+
+
+ if (!is_raw) {
+
+ memcpy(pt,dev->spareBuffer,sizeof(yaffs_PackedTags2));
+ } else {
+ j = 0;
+ k = mtd->oobinfo.oobfree[j][0];
+ n = mtd->oobinfo.oobfree[j][1];
+
+ if (n == 0) {
+ T(YAFFS_TRACE_ERROR, (TSTR("No space in OOB for tags" TENDSTR)));
+ YBUG();
+ }
+
+ for (i = 0; i < sizeof(yaffs_PackedTags2); i++) {
+ if (n == 0) {
+ j++;
+ k = mtd->oobinfo.oobfree[j][0];
+ n = mtd->oobinfo.oobfree[j][1];
+ if (n == 0) {
+ T(YAFFS_TRACE_ERROR, (TSTR("No space in OOB for tags" TENDSTR)));
+ YBUG();
+ }
+ }
+ ptab[i] = dev->spareBuffer[k];
+ k++;
+ n--;
+ }
+ }
+
+}
+
+int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
+ const __u8 * data,
+ const yaffs_ExtendedTags * tags)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ size_t dummy;
+ int retval = 0;
+
+ loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
+
+ yaffs_PackedTags2 pt;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
+ TENDSTR), chunkInNAND, data, tags));
+
+ if (tags) {
+ yaffs_PackTags2(&pt, tags);
+ }
+
+ if (data && tags) {
+ nandmtd2_pt2buf(dev, &pt, 0);
+ retval =
+ mtd->write_ecc(mtd, addr, dev->nBytesPerChunk,
+ &dummy, data, dev->spareBuffer,
+ NULL);
+
+ } else {
+
+ T(YAFFS_TRACE_ALWAYS,
+ (TSTR
+ ("Write chunk with null tags or data!" TENDSTR)));
+ YBUG();
+ }
+
+ 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 = (struct mtd_info *)(dev->genericDevice);
+ size_t dummy;
+ int retval = 0;
+
+ loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
+
+ yaffs_PackedTags2 pt;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_ReadChunkWithTagsToNAND chunk %d data %p tags %p"
+ TENDSTR), chunkInNAND, data, tags));
+
+ if (0 && data && tags) {
+ retval =
+ mtd->read_ecc(mtd, addr, dev->nBytesPerChunk,
+ &dummy, data, dev->spareBuffer,
+ NULL);
+ nandmtd2_buf2pt(dev, &pt, 0);
+ } else {
+ if (data)
+ retval =
+ mtd->read(mtd, addr, dev->nBytesPerChunk, &dummy,
+ data);
+ if (tags) {
+ retval =
+ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
+ dev->spareBuffer);
+ nandmtd2_buf2pt(dev, &pt, 1);
+ }
+ }
+
+ if (tags)
+ yaffs_UnpackTags2(tags, &pt);
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ int retval;
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
+
+ retval =
+ mtd->block_markbad(mtd,
+ blockNo * dev->nChunksPerBlock *
+ dev->nBytesPerChunk);
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+
+}
+
+int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
+ yaffs_BlockState * state, int *sequenceNumber)
+{
+ struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
+ int retval;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
+ retval =
+ mtd->block_isbad(mtd,
+ blockNo * dev->nChunksPerBlock *
+ dev->nBytesPerChunk);
+
+ 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->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 OK seq %d state %d" TENDSTR), *sequenceNumber,
+ *state));
+ }
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
projects / yaffs2.git / commitdiff