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 /* XXX U-BOOT XXX */ 17 #include <common.h> 18 #include "asm/errno.h" 19 20 #include "yportenv.h" 21 #include "yaffs_trace.h" 22 23 #include "yaffs_mtdif2.h" 24 25 #include "linux/mtd/mtd.h" 26 #include "linux/types.h" 27 #include "linux/time.h" 28 29 #include "yaffs_trace.h" 30 #include "yaffs_packedtags2.h" 31 #include "string.h" 32 33 #define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context)) 34 #define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context)) 35 36 37 /* NB For use with inband tags.... 38 * We assume that the data buffer is of size total_bytes_per_chunk so 39 * that we can also use it to load the tags. 40 */ 41 int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, 42 const u8 *data, 43 const struct yaffs_ext_tags *tags) 44 { 45 struct mtd_info *mtd = yaffs_dev_to_mtd(dev); 46 struct mtd_oob_ops ops; 47 48 int retval = 0; 49 50 loff_t addr; 51 u8 local_spare[128]; 52 53 struct yaffs_packed_tags2 pt; 54 55 int packed_tags_size = 56 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); 57 void *packed_tags_ptr = 58 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; 59 60 yaffs_trace(YAFFS_TRACE_MTD, 61 "nandmtd2_write_chunk_tags chunk %d data %p tags %p", 62 nand_chunk, data, tags); 63 64 addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; 65 66 /* For yaffs2 writing there must be both data and tags. 67 * If we're using inband tags, then the tags are stuffed into 68 * the end of the data buffer. 69 */ 70 if (!data || !tags) 71 BUG(); 72 else if (dev->param.inband_tags) { 73 struct yaffs_packed_tags2_tags_only *pt2tp; 74 pt2tp = 75 (struct yaffs_packed_tags2_tags_only *)(data + 76 dev-> 77 data_bytes_per_chunk); 78 yaffs_pack_tags2_tags_only(pt2tp, tags); 79 } else { 80 yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); 81 } 82 83 ops.mode = MTD_OOB_AUTO; 84 ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size; 85 ops.len = dev->param.total_bytes_per_chunk; 86 ops.ooboffs = 0; 87 ops.datbuf = (u8 *) data; 88 ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr; 89 retval = mtd->write_oob(mtd, addr, &ops); 90 91 if (retval == 0) 92 return YAFFS_OK; 93 else 94 return YAFFS_FAIL; 95 } 96 97 int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, 98 u8 *data, struct yaffs_ext_tags *tags) 99 { 100 struct mtd_info *mtd = yaffs_dev_to_mtd(dev); 101 u8 local_spare[128]; 102 struct mtd_oob_ops ops; 103 size_t dummy; 104 int retval = 0; 105 int local_data = 0; 106 struct yaffs_packed_tags2 pt; 107 loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; 108 int packed_tags_size = 109 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); 110 void *packed_tags_ptr = 111 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; 112 113 yaffs_trace(YAFFS_TRACE_MTD, 114 "nandmtd2_read_chunk_tags chunk %d data %p tags %p", 115 nand_chunk, data, tags); 116 117 if (dev->param.inband_tags) { 118 119 if (!data) { 120 local_data = 1; 121 data = yaffs_get_temp_buffer(dev); 122 } 123 124 } 125 126 if (dev->param.inband_tags || (data && !tags)) 127 retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk, 128 &dummy, data); 129 else if (tags) { 130 ops.mode = MTD_OOB_AUTO; 131 ops.ooblen = packed_tags_size; 132 ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size; 133 ops.ooboffs = 0; 134 ops.datbuf = data; 135 ops.oobbuf = local_spare; 136 retval = mtd->read_oob(mtd, addr, &ops); 137 } 138 139 if (dev->param.inband_tags) { 140 if (tags) { 141 struct yaffs_packed_tags2_tags_only *pt2tp; 142 pt2tp = 143 (struct yaffs_packed_tags2_tags_only *) 144 &data[dev->data_bytes_per_chunk]; 145 yaffs_unpack_tags2_tags_only(tags, pt2tp); 146 } 147 } else { 148 if (tags) { 149 memcpy(packed_tags_ptr, 150 local_spare, 151 packed_tags_size); 152 yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); 153 } 154 } 155 156 if (local_data) 157 yaffs_release_temp_buffer(dev, data); 158 159 if (tags && retval == -EBADMSG 160 && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { 161 tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; 162 dev->n_ecc_unfixed++; 163 } 164 if (tags && retval == -EUCLEAN 165 && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { 166 tags->ecc_result = YAFFS_ECC_RESULT_FIXED; 167 dev->n_ecc_fixed++; 168 } 169 if (retval == 0) 170 return YAFFS_OK; 171 else 172 return YAFFS_FAIL; 173 } 174 175 176 int nandmtd2_MarkNANDBlockBad(struct yaffs_dev *dev, int blockNo) 177 { 178 struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); 179 int retval; 180 181 yaffs_trace(YAFFS_TRACE_MTD, 182 "nandmtd2_MarkNANDBlockBad %d", blockNo); 183 184 retval = 185 mtd->block_markbad(mtd, 186 blockNo * dev->param.chunks_per_block * 187 dev->data_bytes_per_chunk); 188 189 if (retval == 0) 190 return YAFFS_OK; 191 else 192 return YAFFS_FAIL; 193 194 } 195 196 int nandmtd2_QueryNANDBlock(struct yaffs_dev *dev, int blockNo, 197 enum yaffs_block_state *state, u32 *sequenceNumber) 198 { 199 struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context); 200 int retval; 201 202 yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_QueryNANDBlock %d", blockNo); 203 retval = 204 mtd->block_isbad(mtd, 205 blockNo * dev->param.chunks_per_block * 206 dev->data_bytes_per_chunk); 207 208 if (retval) { 209 yaffs_trace(YAFFS_TRACE_MTD, "block is bad"); 210 211 *state = YAFFS_BLOCK_STATE_DEAD; 212 *sequenceNumber = 0; 213 } else { 214 struct yaffs_ext_tags t; 215 nandmtd2_read_chunk_tags(dev, 216 blockNo * 217 dev->param.chunks_per_block, NULL, 218 &t); 219 220 if (t.chunk_used) { 221 *sequenceNumber = t.seq_number; 222 *state = YAFFS_BLOCK_STATE_NEEDS_SCAN; 223 } else { 224 *sequenceNumber = 0; 225 *state = YAFFS_BLOCK_STATE_EMPTY; 226 } 227 } 228 yaffs_trace(YAFFS_TRACE_MTD, "block is bad seq %d state %d", 229 *sequenceNumber, *state); 230 231 if (retval == 0) 232 return YAFFS_OK; 233 else 234 return YAFFS_FAIL; 235 } 236