xref: /openbmc/u-boot/fs/yaffs2/yaffs_nand.c (revision 607232e4)
1 /*
2  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
3  *
4  * Copyright (C) 2002-2011 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 
17 #include "yaffs_getblockinfo.h"
18 #include "yaffs_summary.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 	int flash_chunk = nand_chunk - dev->chunk_offset;
26 
27 	dev->n_page_reads++;
28 
29 	/* If there are no tags provided use local tags. */
30 	if (!tags)
31 		tags = &local_tags;
32 
33 	if (dev->param.read_chunk_tags_fn)
34 		result =
35 		    dev->param.read_chunk_tags_fn(dev, flash_chunk, buffer,
36 						  tags);
37 	else
38 		result = yaffs_tags_compat_rd(dev,
39 					      flash_chunk, buffer, tags);
40 	if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
41 
42 		struct yaffs_block_info *bi;
43 		bi = yaffs_get_block_info(dev,
44 					  nand_chunk /
45 					  dev->param.chunks_per_block);
46 		yaffs_handle_chunk_error(dev, bi);
47 	}
48 	return result;
49 }
50 
51 int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev,
52 				int nand_chunk,
53 				const u8 *buffer, struct yaffs_ext_tags *tags)
54 {
55 	int result;
56 	int flash_chunk = nand_chunk - dev->chunk_offset;
57 
58 	dev->n_page_writes++;
59 
60 	if (tags) {
61 		tags->seq_number = dev->seq_number;
62 		tags->chunk_used = 1;
63 		yaffs_trace(YAFFS_TRACE_WRITE,
64 			"Writing chunk %d tags %d %d",
65 			nand_chunk, tags->obj_id, tags->chunk_id);
66 	} else {
67 		yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags");
68 		BUG();
69 		return YAFFS_FAIL;
70 	}
71 
72 	if (dev->param.write_chunk_tags_fn)
73 		result = dev->param.write_chunk_tags_fn(dev, flash_chunk,
74 							buffer, tags);
75 	else
76 		result = yaffs_tags_compat_wr(dev, flash_chunk, buffer, tags);
77 
78 	yaffs_summary_add(dev, tags, nand_chunk);
79 
80 	return result;
81 }
82 
83 int yaffs_mark_bad(struct yaffs_dev *dev, int block_no)
84 {
85 	block_no -= dev->block_offset;
86 	if (dev->param.bad_block_fn)
87 		return dev->param.bad_block_fn(dev, block_no);
88 
89 	return yaffs_tags_compat_mark_bad(dev, block_no);
90 }
91 
92 int yaffs_query_init_block_state(struct yaffs_dev *dev,
93 				 int block_no,
94 				 enum yaffs_block_state *state,
95 				 u32 *seq_number)
96 {
97 	block_no -= dev->block_offset;
98 	if (dev->param.query_block_fn)
99 		return dev->param.query_block_fn(dev, block_no, state,
100 						 seq_number);
101 
102 	return yaffs_tags_compat_query_block(dev, block_no, state, seq_number);
103 }
104 
105 int yaffs_erase_block(struct yaffs_dev *dev, int flash_block)
106 {
107 	int result;
108 
109 	flash_block -= dev->block_offset;
110 	dev->n_erasures++;
111 	result = dev->param.erase_fn(dev, flash_block);
112 	return result;
113 }
114 
115 int yaffs_init_nand(struct yaffs_dev *dev)
116 {
117 	if (dev->param.initialise_flash_fn)
118 		return dev->param.initialise_flash_fn(dev);
119 	return YAFFS_OK;
120 }
121