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