2 * YAFFS: Yet another FFS. A NAND-flash specific file system.
3 * yaffs_mtdif.c NAND mtd wrapper functions.
5 * Copyright (C) 2002 Aleph One Ltd.
6 * for Toby Churchill Ltd and Brightstar Engineering
8 * Created by Charles Manning <charles@aleph1.co.uk>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
16 /* mtd interface for YAFFS2 */
18 const char *yaffs_mtdif2_c_version =
19 "$Id: yaffs_mtdif2.c,v 1.10 2005-12-07 22:00:38 charles Exp $";
24 #include "yaffs_mtdif2.h"
26 #include "linux/mtd/mtd.h"
27 #include "linux/types.h"
28 #include "linux/time.h"
30 #include "yaffs_packedtags2.h"
32 int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
34 const yaffs_ExtendedTags * tags)
36 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
40 loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
46 ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
47 TENDSTR), chunkInNAND, data, tags));
50 yaffs_PackTags2(&pt, tags);
56 mtd->write_ecc(mtd, addr, dev->nBytesPerChunk,
57 &dummy, data, (__u8 *) & pt, NULL);
60 mtd->write_ecc(mtd, addr, dev->nBytesPerChunk,
61 &dummy, data, (__u8 *) & pt, NULL);
65 mtd->write(mtd, addr, dev->nBytesPerChunk, &dummy,
69 mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
80 int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
81 __u8 * data, yaffs_ExtendedTags * tags)
83 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
87 loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
93 ("nandmtd2_ReadChunkWithTagsToNAND chunk %d data %p tags %p"
94 TENDSTR), chunkInNAND, data, tags));
97 if (dev->useNANDECC) {
99 mtd->read_ecc(mtd, addr, dev->nBytesPerChunk,
100 &dummy, data, dev->spareBuffer,
104 mtd->read_ecc(mtd, addr, dev->nBytesPerChunk,
105 &dummy, data, dev->spareBuffer,
111 mtd->read(mtd, addr, dev->nBytesPerChunk, &dummy,
115 mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
119 memcpy(&pt, dev->spareBuffer, sizeof(pt));
122 yaffs_UnpackTags2(tags, &pt);
130 int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
132 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
135 (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
138 mtd->block_markbad(mtd,
139 blockNo * dev->nChunksPerBlock *
140 dev->nBytesPerChunk);
149 int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
150 yaffs_BlockState * state, int *sequenceNumber)
152 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
156 (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
158 mtd->block_isbad(mtd,
159 blockNo * dev->nChunksPerBlock *
160 dev->nBytesPerChunk);
163 T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
165 *state = YAFFS_BLOCK_STATE_DEAD;
168 yaffs_ExtendedTags t;
169 nandmtd2_ReadChunkWithTagsFromNAND(dev,
171 dev->nChunksPerBlock, NULL,
175 *sequenceNumber = t.sequenceNumber;
176 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
179 *state = YAFFS_BLOCK_STATE_EMPTY;
183 (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,