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.
15 /* mtd interface for YAFFS2 */
17 const char *yaffs_mtdif2_c_version =
18 "$Id: yaffs_mtdif2.c,v 1.16 2007-02-12 16:55:26 wookey Exp $";
23 #include "yaffs_mtdif2.h"
25 #include "linux/mtd/mtd.h"
26 #include "linux/types.h"
27 #include "linux/time.h"
29 #include "yaffs_packedtags2.h"
31 int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
33 const yaffs_ExtendedTags * tags)
35 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
36 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
37 struct mtd_oob_ops ops;
43 loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
49 ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
50 TENDSTR), chunkInNAND, data, tags));
52 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
54 yaffs_PackTags2(&pt, tags);
56 BUG(); /* both tags and data should always be present */
59 ops.mode = MTD_OOB_AUTO;
60 ops.ooblen = sizeof(pt);
61 ops.len = dev->nDataBytesPerChunk;
63 ops.datbuf = (__u8 *)data;
64 ops.oobbuf = (void *)&pt;
65 retval = mtd->write_oob(mtd, addr, &ops);
67 BUG(); /* both tags and data should always be present */
70 yaffs_PackTags2(&pt, tags);
76 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
77 &dummy, data, (__u8 *) & pt, NULL);
80 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
81 &dummy, data, (__u8 *) & pt, NULL);
85 mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
89 mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
101 int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
102 __u8 * data, yaffs_ExtendedTags * tags)
104 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
105 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
106 struct mtd_oob_ops ops;
111 loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
113 yaffs_PackedTags2 pt;
117 ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
118 TENDSTR), chunkInNAND, data, tags));
120 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
122 retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
125 ops.mode = MTD_OOB_AUTO;
126 ops.ooblen = sizeof(pt);
127 ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
130 ops.oobbuf = dev->spareBuffer;
131 retval = mtd->read_oob(mtd, addr, &ops);
135 if (dev->useNANDECC) {
137 mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
138 &dummy, data, dev->spareBuffer,
142 mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
143 &dummy, data, dev->spareBuffer,
149 mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
153 mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
158 memcpy(&pt, dev->spareBuffer, sizeof(pt));
161 yaffs_UnpackTags2(tags, &pt);
163 if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
164 tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
172 int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
174 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
177 (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
180 mtd->block_markbad(mtd,
181 blockNo * dev->nChunksPerBlock *
182 dev->nDataBytesPerChunk);
191 int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
192 yaffs_BlockState * state, int *sequenceNumber)
194 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
198 (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
200 mtd->block_isbad(mtd,
201 blockNo * dev->nChunksPerBlock *
202 dev->nDataBytesPerChunk);
205 T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
207 *state = YAFFS_BLOCK_STATE_DEAD;
210 yaffs_ExtendedTags t;
211 nandmtd2_ReadChunkWithTagsFromNAND(dev,
213 dev->nChunksPerBlock, NULL,
217 *sequenceNumber = t.sequenceNumber;
218 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
221 *state = YAFFS_BLOCK_STATE_EMPTY;
225 (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,