2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2007 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 /* mtd interface for YAFFS2 */
16 const char *yaffs_mtdif2_c_version =
17 "$Id: yaffs_mtdif2.c,v 1.22 2008-11-02 22:47:13 charles Exp $";
22 #include "yaffs_mtdif2.h"
24 #include "linux/mtd/mtd.h"
25 #include "linux/types.h"
26 #include "linux/time.h"
28 #include "yaffs_packedtags2.h"
30 /* NB For use with inband tags....
31 * We assume that the data buffer is of size totalBytersPerChunk so that we can also
32 * use it to load the tags.
34 int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
36 const yaffs_ExtendedTags * tags)
38 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
39 #if (MTD_VERSION_CODE > MTD_VERSION(2,6,17))
40 struct mtd_oob_ops ops;
52 ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
53 TENDSTR), chunkInNAND, data, tags));
56 addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
58 /* For yaffs2 writing there must be both data and tags.
59 * If we're using inband tags, then the tags are stuffed into
60 * the end of the data buffer.
64 else if(dev->inbandTags){
65 yaffs_PackedTags2TagsPart *pt2tp;
66 pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
67 yaffs_PackTags2TagsPart(pt2tp,tags);
70 yaffs_PackTags2(&pt, tags);
72 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
73 ops.mode = MTD_OOB_AUTO;
74 ops.ooblen = (dev->inbandTags) ? 0 : sizeof(pt);
75 ops.len = dev->totalBytesPerChunk;
77 ops.datbuf = (__u8 *)data;
78 ops.oobbuf = (dev->inbandTags) ? NULL : (void *)&pt;
79 retval = mtd->write_oob(mtd, addr, &ops);
82 if (!dev->inbandTags) {
84 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
85 &dummy, data, (__u8 *) & pt, NULL);
88 mtd->write(mtd, addr, dev->totalBytesPerChunk, &dummy,
99 int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
100 __u8 * data, yaffs_ExtendedTags * tags)
102 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
103 #if (MTD_VERSION_CODE > MTD_VERSION(2,6,17))
104 struct mtd_oob_ops ops;
110 loff_t addr = ((loff_t) chunkInNAND) * dev->totalBytesPerChunk;
112 yaffs_PackedTags2 pt;
116 ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
117 TENDSTR), chunkInNAND, data, tags));
123 data = yaffs_GetTempBuffer(dev,__LINE__);
130 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
131 if (dev->inbandTags || (data && !tags))
132 retval = mtd->read(mtd, addr, dev->totalBytesPerChunk,
135 ops.mode = MTD_OOB_AUTO;
136 ops.ooblen = sizeof(pt);
137 ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
140 ops.oobbuf = dev->spareBuffer;
141 retval = mtd->read_oob(mtd, addr, &ops);
144 if (!dev->inbandTags && data && tags) {
146 retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
147 &dummy, data, dev->spareBuffer,
152 mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
154 if (!dev->inbandTags && tags)
156 mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
164 yaffs_PackedTags2TagsPart * pt2tp;
165 pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
166 yaffs_UnpackTags2TagsPart(tags,pt2tp);
171 memcpy(&pt, dev->spareBuffer, sizeof(pt));
172 yaffs_UnpackTags2(tags, &pt);
177 yaffs_ReleaseTempBuffer(dev,data,__LINE__);
179 if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
180 tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
187 int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
189 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
192 (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
195 mtd->block_markbad(mtd,
196 blockNo * dev->nChunksPerBlock *
197 dev->totalBytesPerChunk);
206 int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
207 yaffs_BlockState * state, __u32 *sequenceNumber)
209 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
213 (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
215 mtd->block_isbad(mtd,
216 blockNo * dev->nChunksPerBlock *
217 dev->totalBytesPerChunk);
220 T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
222 *state = YAFFS_BLOCK_STATE_DEAD;
225 yaffs_ExtendedTags t;
226 nandmtd2_ReadChunkWithTagsFromNAND(dev,
228 dev->nChunksPerBlock, NULL,
232 *sequenceNumber = t.sequenceNumber;
233 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
236 *state = YAFFS_BLOCK_STATE_EMPTY;
240 (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,