| Arve Hjønnevåg | 8237911 | 2010-05-18 20:35:30 -0700 | [diff] [blame] | 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(struct yaffs_dev *dev, int nand_chunk, |
| 21 | u8 * buffer, struct yaffs_ext_tags *tags) |
| 22 | { |
| 23 | int result; |
| 24 | struct yaffs_ext_tags local_tags; |
| 25 | |
| 26 | int realigned_chunk = nand_chunk - dev->chunk_offset; |
| 27 | |
| 28 | dev->n_page_reads++; |
| 29 | |
| 30 | /* If there are no tags provided, use local tags to get prioritised gc working */ |
| 31 | if (!tags) |
| 32 | tags = &local_tags; |
| 33 | |
| 34 | if (dev->param.read_chunk_tags_fn) |
| 35 | result = |
| 36 | dev->param.read_chunk_tags_fn(dev, realigned_chunk, buffer, |
| 37 | tags); |
| 38 | else |
| 39 | result = yaffs_tags_compat_rd(dev, |
| 40 | realigned_chunk, buffer, tags); |
| 41 | if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) { |
| 42 | |
| 43 | struct yaffs_block_info *bi; |
| 44 | bi = yaffs_get_block_info(dev, |
| 45 | nand_chunk / |
| 46 | dev->param.chunks_per_block); |
| 47 | yaffs_handle_chunk_error(dev, bi); |
| 48 | } |
| 49 | |
| 50 | return result; |
| 51 | } |
| 52 | |
| 53 | int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, |
| 54 | int nand_chunk, |
| 55 | const u8 * buffer, struct yaffs_ext_tags *tags) |
| 56 | { |
| 57 | |
| 58 | dev->n_page_writes++; |
| 59 | |
| 60 | nand_chunk -= dev->chunk_offset; |
| 61 | |
| 62 | if (tags) { |
| 63 | tags->seq_number = dev->seq_number; |
| 64 | tags->chunk_used = 1; |
| 65 | if (!yaffs_validate_tags(tags)) { |
| 66 | yaffs_trace(YAFFS_TRACE_ERROR, "Writing uninitialised tags"); |
| 67 | YBUG(); |
| 68 | } |
| 69 | yaffs_trace(YAFFS_TRACE_WRITE, |
| 70 | "Writing chunk %d tags %d %d", |
| 71 | nand_chunk, tags->obj_id, tags->chunk_id); |
| 72 | } else { |
| 73 | yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags"); |
| 74 | YBUG(); |
| 75 | } |
| 76 | |
| 77 | if (dev->param.write_chunk_tags_fn) |
| 78 | return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer, |
| 79 | tags); |
| 80 | else |
| 81 | return yaffs_tags_compat_wr(dev, nand_chunk, buffer, tags); |
| 82 | } |
| 83 | |
| 84 | int yaffs_mark_bad(struct yaffs_dev *dev, int block_no) |
| 85 | { |
| 86 | block_no -= dev->block_offset; |
| 87 | |
| 88 | if (dev->param.bad_block_fn) |
| 89 | return dev->param.bad_block_fn(dev, block_no); |
| 90 | else |
| 91 | return yaffs_tags_compat_mark_bad(dev, block_no); |
| 92 | } |
| 93 | |
| 94 | int yaffs_query_init_block_state(struct yaffs_dev *dev, |
| 95 | int block_no, |
| 96 | enum yaffs_block_state *state, |
| 97 | u32 * seq_number) |
| 98 | { |
| 99 | block_no -= dev->block_offset; |
| 100 | |
| 101 | if (dev->param.query_block_fn) |
| 102 | return dev->param.query_block_fn(dev, block_no, state, |
| 103 | seq_number); |
| 104 | else |
| 105 | return yaffs_tags_compat_query_block(dev, block_no, |
| 106 | state, seq_number); |
| 107 | } |
| 108 | |
| 109 | int yaffs_erase_block(struct yaffs_dev *dev, int flash_block) |
| 110 | { |
| 111 | int result; |
| 112 | |
| 113 | flash_block -= dev->block_offset; |
| 114 | |
| 115 | dev->n_erasures++; |
| 116 | |
| 117 | result = dev->param.erase_fn(dev, flash_block); |
| 118 | |
| 119 | return result; |
| 120 | } |
| 121 | |
| 122 | int yaffs_init_nand(struct yaffs_dev *dev) |
| 123 | { |
| 124 | if (dev->param.initialise_flash_fn) |
| 125 | return dev->param.initialise_flash_fn(dev); |
| 126 | return YAFFS_OK; |
| 127 | } |