| 1 | /* |
| 2 | * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. |
| 3 | * |
| 4 | * Copyright (C) 2002-2010 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 | #include "yaffs_nand.h" |
| 15 | #include "yaffs_tagscompat.h" |
| 16 | #include "yaffs_tagsvalidity.h" |
| 17 | |
| 18 | #include "yaffs_getblockinfo.h" |
| 19 | |
| 20 | int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk, |
| 21 | __u8 *buffer, |
| 22 | yaffs_ext_tags *tags) |
| 23 | { |
| 24 | int result; |
| 25 | yaffs_ext_tags localTags; |
| 26 | |
| 27 | int realignedChunkInNAND = nand_chunk - dev->chunk_offset; |
| 28 | |
| 29 | dev->n_page_reads++; |
| 30 | |
| 31 | /* If there are no tags provided, use local tags to get prioritised gc working */ |
| 32 | if (!tags) |
| 33 | tags = &localTags; |
| 34 | |
| 35 | if (dev->param.read_chunk_tags_fn) |
| 36 | result = dev->param.read_chunk_tags_fn(dev, realignedChunkInNAND, buffer, |
| 37 | tags); |
| 38 | else |
| 39 | result = yaffs_tags_compat_rd(dev, |
| 40 | realignedChunkInNAND, |
| 41 | buffer, |
| 42 | tags); |
| 43 | if (tags && |
| 44 | tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) { |
| 45 | |
| 46 | yaffs_block_info_t *bi; |
| 47 | bi = yaffs_get_block_info(dev, nand_chunk/dev->param.chunks_per_block); |
| 48 | yaffs_handle_chunk_error(dev, bi); |
| 49 | } |
| 50 | |
| 51 | return result; |
| 52 | } |
| 53 | |
| 54 | int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev, |
| 55 | int nand_chunk, |
| 56 | const __u8 *buffer, |
| 57 | yaffs_ext_tags *tags) |
| 58 | { |
| 59 | |
| 60 | dev->n_page_writes++; |
| 61 | |
| 62 | nand_chunk -= dev->chunk_offset; |
| 63 | |
| 64 | |
| 65 | if (tags) { |
| 66 | tags->seq_number = dev->seq_number; |
| 67 | tags->chunk_used = 1; |
| 68 | if (!yaffs_validate_tags(tags)) { |
| 69 | T(YAFFS_TRACE_ERROR, |
| 70 | (TSTR("Writing uninitialised tags" TENDSTR))); |
| 71 | YBUG(); |
| 72 | } |
| 73 | T(YAFFS_TRACE_WRITE, |
| 74 | (TSTR("Writing chunk %d tags %d %d" TENDSTR), nand_chunk, |
| 75 | tags->obj_id, tags->chunk_id)); |
| 76 | } else { |
| 77 | T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR))); |
| 78 | YBUG(); |
| 79 | } |
| 80 | |
| 81 | if (dev->param.write_chunk_tags_fn) |
| 82 | return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer, |
| 83 | tags); |
| 84 | else |
| 85 | return yaffs_tags_compat_wr(dev, |
| 86 | nand_chunk, |
| 87 | buffer, |
| 88 | tags); |
| 89 | } |
| 90 | |
| 91 | int yaffs_mark_bad(yaffs_dev_t *dev, int block_no) |
| 92 | { |
| 93 | block_no -= dev->block_offset; |
| 94 | |
| 95 | |
| 96 | if (dev->param.bad_block_fn) |
| 97 | return dev->param.bad_block_fn(dev, block_no); |
| 98 | else |
| 99 | return yaffs_tags_compat_mark_bad(dev, block_no); |
| 100 | } |
| 101 | |
| 102 | int yaffs_query_init_block_state(yaffs_dev_t *dev, |
| 103 | int block_no, |
| 104 | yaffs_block_state_t *state, |
| 105 | __u32 *seq_number) |
| 106 | { |
| 107 | block_no -= dev->block_offset; |
| 108 | |
| 109 | if (dev->param.query_block_fn) |
| 110 | return dev->param.query_block_fn(dev, block_no, state, seq_number); |
| 111 | else |
| 112 | return yaffs_tags_compat_query_block(dev, block_no, |
| 113 | state, |
| 114 | seq_number); |
| 115 | } |
| 116 | |
| 117 | |
| 118 | int yaffs_erase_block(struct yaffs_dev_s *dev, |
| 119 | int flash_block) |
| 120 | { |
| 121 | int result; |
| 122 | |
| 123 | flash_block -= dev->block_offset; |
| 124 | |
| 125 | dev->n_erasures++; |
| 126 | |
| 127 | result = dev->param.erase_fn(dev, flash_block); |
| 128 | |
| 129 | return result; |
| 130 | } |
| 131 | |
| 132 | int yaffs_init_nand(struct yaffs_dev_s *dev) |
| 133 | { |
| 134 | if(dev->param.initialise_flash_fn) |
| 135 | return dev->param.initialise_flash_fn(dev); |
| 136 | return YAFFS_OK; |
| 137 | } |
| 138 | |
| 139 | |
| 140 | |
| 141 | |
