| 1 | /* |
| 2 | * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. |
| 3 | * |
| 4 | * Copyright (C) 2002-2007 Aleph One Ltd. |
| 5 | * for Toby Churchill Ltd and Brightstar Engineering |
| 6 | * |
| 7 | * Created by Charles Manning <charles@aleph1.co.uk> |
| 8 | * |
| 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. |
| 12 | */ |
| 13 | |
| 14 | /* mtd interface for YAFFS2 */ |
| 15 | |
| 16 | const char *yaffs_mtdif2_c_version = |
| 17 | "$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $"; |
| 18 | |
| 19 | #include "yportenv.h" |
| 20 | |
| 21 | |
| 22 | #include "yaffs_mtdif2.h" |
| 23 | |
| 24 | #include "linux/mtd/mtd.h" |
| 25 | #include "linux/types.h" |
| 26 | #include "linux/time.h" |
| 27 | |
| 28 | #include "yaffs_packedtags2.h" |
| 29 | |
| 30 | int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND, |
| 31 | const __u8 * data, |
| 32 | const yaffs_ExtendedTags * tags) |
| 33 | { |
| 34 | struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); |
| 35 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) |
| 36 | struct mtd_oob_ops ops; |
| 37 | #else |
| 38 | size_t dummy; |
| 39 | #endif |
| 40 | int retval = 0; |
| 41 | |
| 42 | loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; |
| 43 | |
| 44 | yaffs_PackedTags2 pt; |
| 45 | |
| 46 | T(YAFFS_TRACE_MTD, |
| 47 | (TSTR |
| 48 | ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p" |
| 49 | TENDSTR), chunkInNAND, data, tags)); |
| 50 | |
| 51 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) |
| 52 | if (tags) |
| 53 | yaffs_PackTags2(&pt, tags); |
| 54 | else |
| 55 | BUG(); /* both tags and data should always be present */ |
| 56 | |
| 57 | if (data) { |
| 58 | ops.mode = MTD_OOB_AUTO; |
| 59 | ops.ooblen = sizeof(pt); |
| 60 | ops.len = dev->nDataBytesPerChunk; |
| 61 | ops.ooboffs = 0; |
| 62 | ops.datbuf = (__u8 *)data; |
| 63 | ops.oobbuf = (void *)&pt; |
| 64 | retval = mtd->write_oob(mtd, addr, &ops); |
| 65 | } else |
| 66 | BUG(); /* both tags and data should always be present */ |
| 67 | #else |
| 68 | if (tags) { |
| 69 | yaffs_PackTags2(&pt, tags); |
| 70 | } |
| 71 | |
| 72 | if (data && tags) { |
| 73 | if (dev->useNANDECC) |
| 74 | retval = |
| 75 | mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, |
| 76 | &dummy, data, (__u8 *) & pt, NULL); |
| 77 | else |
| 78 | retval = |
| 79 | mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, |
| 80 | &dummy, data, (__u8 *) & pt, NULL); |
| 81 | } else { |
| 82 | if (data) |
| 83 | retval = |
| 84 | mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy, |
| 85 | data); |
| 86 | if (tags) |
| 87 | retval = |
| 88 | mtd->write_oob(mtd, addr, mtd->oobsize, &dummy, |
| 89 | (__u8 *) & pt); |
| 90 | |
| 91 | } |
| 92 | #endif |
| 93 | |
| 94 | if (retval == 0) |
| 95 | return YAFFS_OK; |
| 96 | else |
| 97 | return YAFFS_FAIL; |
| 98 | } |
| 99 | |
| 100 | int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND, |
| 101 | __u8 * data, yaffs_ExtendedTags * tags) |
| 102 | { |
| 103 | struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); |
| 104 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) |
| 105 | struct mtd_oob_ops ops; |
| 106 | #endif |
| 107 | size_t dummy; |
| 108 | int retval = 0; |
| 109 | |
| 110 | loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk; |
| 111 | |
| 112 | yaffs_PackedTags2 pt; |
| 113 | |
| 114 | T(YAFFS_TRACE_MTD, |
| 115 | (TSTR |
| 116 | ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p" |
| 117 | TENDSTR), chunkInNAND, data, tags)); |
| 118 | |
| 119 | #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17)) |
| 120 | if (data && !tags) |
| 121 | retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk, |
| 122 | &dummy, data); |
| 123 | else if (tags) { |
| 124 | ops.mode = MTD_OOB_AUTO; |
| 125 | ops.ooblen = sizeof(pt); |
| 126 | ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt); |
| 127 | ops.ooboffs = 0; |
| 128 | ops.datbuf = data; |
| 129 | ops.oobbuf = dev->spareBuffer; |
| 130 | retval = mtd->read_oob(mtd, addr, &ops); |
| 131 | } |
| 132 | #else |
| 133 | if (data && tags) { |
| 134 | if (dev->useNANDECC) { |
| 135 | retval = |
| 136 | mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, |
| 137 | &dummy, data, dev->spareBuffer, |
| 138 | NULL); |
| 139 | } else { |
| 140 | retval = |
| 141 | mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, |
| 142 | &dummy, data, dev->spareBuffer, |
| 143 | NULL); |
| 144 | } |
| 145 | } else { |
| 146 | if (data) |
| 147 | retval = |
| 148 | mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, |
| 149 | data); |
| 150 | if (tags) |
| 151 | retval = |
| 152 | mtd->read_oob(mtd, addr, mtd->oobsize, &dummy, |
| 153 | dev->spareBuffer); |
| 154 | } |
| 155 | #endif |
| 156 | |
| 157 | memcpy(&pt, dev->spareBuffer, sizeof(pt)); |
| 158 | |
| 159 | if (tags) |
| 160 | yaffs_UnpackTags2(tags, &pt); |
| 161 | |
| 162 | if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) |
| 163 | tags->eccResult = YAFFS_ECC_RESULT_UNFIXED; |
| 164 | |
| 165 | if (retval == 0) |
| 166 | return YAFFS_OK; |
| 167 | else |
| 168 | return YAFFS_FAIL; |
| 169 | } |
| 170 | |
| 171 | int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) |
| 172 | { |
| 173 | struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); |
| 174 | int retval; |
| 175 | T(YAFFS_TRACE_MTD, |
| 176 | (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo)); |
| 177 | |
| 178 | retval = |
| 179 | mtd->block_markbad(mtd, |
| 180 | blockNo * dev->nChunksPerBlock * |
| 181 | dev->nDataBytesPerChunk); |
| 182 | |
| 183 | if (retval == 0) |
| 184 | return YAFFS_OK; |
| 185 | else |
| 186 | return YAFFS_FAIL; |
| 187 | |
| 188 | } |
| 189 | |
| 190 | int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, |
| 191 | yaffs_BlockState * state, int *sequenceNumber) |
| 192 | { |
| 193 | struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice); |
| 194 | int retval; |
| 195 | |
| 196 | T(YAFFS_TRACE_MTD, |
| 197 | (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo)); |
| 198 | retval = |
| 199 | mtd->block_isbad(mtd, |
| 200 | blockNo * dev->nChunksPerBlock * |
| 201 | dev->nDataBytesPerChunk); |
| 202 | |
| 203 | if (retval) { |
| 204 | T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR))); |
| 205 | |
| 206 | *state = YAFFS_BLOCK_STATE_DEAD; |
| 207 | *sequenceNumber = 0; |
| 208 | } else { |
| 209 | yaffs_ExtendedTags t; |
| 210 | nandmtd2_ReadChunkWithTagsFromNAND(dev, |
| 211 | blockNo * |
| 212 | dev->nChunksPerBlock, NULL, |
| 213 | &t); |
| 214 | |
| 215 | if (t.chunkUsed) { |
| 216 | *sequenceNumber = t.sequenceNumber; |
| 217 | *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; |
| 218 | } else { |
| 219 | *sequenceNumber = 0; |
| 220 | *state = YAFFS_BLOCK_STATE_EMPTY; |
| 221 | } |
| 222 | } |
| 223 | T(YAFFS_TRACE_MTD, |
| 224 | (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber, |
| 225 | *state)); |
| 226 | |
| 227 | if (retval == 0) |
| 228 | return YAFFS_OK; |
| 229 | else |
| 230 | return YAFFS_FAIL; |
| 231 | } |
| 232 | |
| 233 | |
