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 =
21 #include "yaffs_mtdif2.h"
23 #include "linux/mtd/mtd.h"
24 #include "linux/types.h"
25 #include "linux/time.h"
27 #include "yaffs_packedtags2.h"
29 int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
31 const yaffs_ExtendedTags * tags)
33 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
34 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
35 struct mtd_oob_ops ops;
41 loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
47 ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
48 TENDSTR), chunkInNAND, data, tags));
50 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
52 yaffs_PackTags2(&pt, tags);
54 BUG(); /* both tags and data should always be present */
57 ops.mode = MTD_OOB_AUTO;
58 ops.ooblen = sizeof(pt);
59 ops.len = dev->nDataBytesPerChunk;
61 ops.datbuf = (__u8 *)data;
62 ops.oobbuf = (void *)&pt;
63 retval = mtd->write_oob(mtd, addr, &ops);
65 BUG(); /* both tags and data should always be present */
68 yaffs_PackTags2(&pt, tags);
74 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
75 &dummy, data, (__u8 *) & pt, NULL);
78 mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
79 &dummy, data, (__u8 *) & pt, NULL);
83 mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
87 mtd->write_oob(mtd, addr, mtd->oobsize, &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 (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
104 struct mtd_oob_ops ops;
109 loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
111 yaffs_PackedTags2 pt;
115 ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
116 TENDSTR), chunkInNAND, data, tags));
118 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
120 retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
123 ops.mode = MTD_OOB_AUTO;
124 ops.ooblen = sizeof(pt);
125 ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
128 ops.oobbuf = dev->spareBuffer;
129 retval = mtd->read_oob(mtd, addr, &ops);
133 if (dev->useNANDECC) {
135 mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
136 &dummy, data, dev->spareBuffer,
140 mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
141 &dummy, data, dev->spareBuffer,
147 mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
151 mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
156 memcpy(&pt, dev->spareBuffer, sizeof(pt));
159 yaffs_UnpackTags2(tags, &pt);
161 if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
162 tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
170 int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
172 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
175 (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
178 mtd->block_markbad(mtd,
179 blockNo * dev->nChunksPerBlock *
180 dev->nDataBytesPerChunk);
189 int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
190 yaffs_BlockState * state, int *sequenceNumber)
192 struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
196 (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
198 mtd->block_isbad(mtd,
199 blockNo * dev->nChunksPerBlock *
200 dev->nDataBytesPerChunk);
203 T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
205 *state = YAFFS_BLOCK_STATE_DEAD;
208 yaffs_ExtendedTags t;
209 nandmtd2_ReadChunkWithTagsFromNAND(dev,
211 dev->nChunksPerBlock, NULL,
215 *sequenceNumber = t.sequenceNumber;
216 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
219 *state = YAFFS_BLOCK_STATE_EMPTY;
223 (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,