2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2010 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
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.
14 /* mtd interface for YAFFS2 */
17 #include "yaffs_trace.h"
19 #include "yaffs_mtdif2.h"
21 #include "linux/mtd/mtd.h"
22 #include "linux/types.h"
23 #include "linux/time.h"
25 #include "yaffs_packedtags2.h"
27 #include "yaffs_linux.h"
29 /* NB For use with inband tags....
30 * We assume that the data buffer is of size total_bytes_per_chunk so that we can also
31 * use it to load the tags.
33 int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
35 const struct yaffs_ext_tags *tags)
37 struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
38 #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
39 struct mtd_oob_ops ops;
47 struct yaffs_packed_tags2 pt;
49 int packed_tags_size =
50 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
51 void *packed_tags_ptr =
52 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
54 yaffs_trace(YAFFS_TRACE_MTD,
55 "nandmtd2_write_chunk_tags chunk %d data %p tags %p",
56 nand_chunk, data, tags);
58 addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
60 /* For yaffs2 writing there must be both data and tags.
61 * If we're using inband tags, then the tags are stuffed into
62 * the end of the data buffer.
66 else if (dev->param.inband_tags) {
67 struct yaffs_packed_tags2_tags_only *pt2tp;
69 (struct yaffs_packed_tags2_tags_only *)(data +
71 data_bytes_per_chunk);
72 yaffs_pack_tags2_tags_only(pt2tp, tags);
74 yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
77 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
78 ops.mode = MTD_OOB_AUTO;
79 ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size;
80 ops.len = dev->param.total_bytes_per_chunk;
82 ops.datbuf = (u8 *) data;
83 ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
84 retval = mtd->write_oob(mtd, addr, &ops);
87 if (!dev->param.inband_tags) {
89 mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk,
90 &dummy, data, (u8 *) packed_tags_ptr, NULL);
93 mtd->write(mtd, addr, dev->param.total_bytes_per_chunk,
104 int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
105 u8 * data, struct yaffs_ext_tags *tags)
107 struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
108 #if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
109 struct mtd_oob_ops ops;
115 loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
117 struct yaffs_packed_tags2 pt;
119 int packed_tags_size =
120 dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
121 void *packed_tags_ptr =
122 dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
124 yaffs_trace(YAFFS_TRACE_MTD,
125 "nandmtd2_read_chunk_tags chunk %d data %p tags %p",
126 nand_chunk, data, tags);
128 if (dev->param.inband_tags) {
132 data = yaffs_get_temp_buffer(dev, __LINE__);
137 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
138 if (dev->param.inband_tags || (data && !tags))
139 retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk,
142 ops.mode = MTD_OOB_AUTO;
143 ops.ooblen = packed_tags_size;
144 ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size;
147 ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer;
148 retval = mtd->read_oob(mtd, addr, &ops);
151 if (!dev->param.inband_tags && data && tags) {
153 retval = mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk,
154 &dummy, data, dev->spare_buffer, NULL);
158 mtd->read(mtd, addr, dev->data_bytes_per_chunk,
160 if (!dev->param.inband_tags && tags)
162 mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
167 if (dev->param.inband_tags) {
169 struct yaffs_packed_tags2_tags_only *pt2tp;
171 (struct yaffs_packed_tags2_tags_only *)
172 &data[dev->data_bytes_per_chunk];
173 yaffs_unpack_tags2_tags_only(tags, pt2tp);
177 memcpy(packed_tags_ptr,
178 yaffs_dev_to_lc(dev)->spare_buffer,
180 yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
185 yaffs_release_temp_buffer(dev, data, __LINE__);
187 if (tags && retval == -EBADMSG
188 && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
189 tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
190 dev->n_ecc_unfixed++;
192 if (tags && retval == -EUCLEAN
193 && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
194 tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
203 int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no)
205 struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
207 yaffs_trace(YAFFS_TRACE_MTD,
208 "nandmtd2_mark_block_bad %d",
212 mtd->block_markbad(mtd,
213 block_no * dev->param.chunks_per_block *
214 dev->param.total_bytes_per_chunk);
223 int nandmtd2_query_block(struct yaffs_dev *dev, int block_no,
224 enum yaffs_block_state *state, u32 * seq_number)
226 struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
229 yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no);
231 mtd->block_isbad(mtd,
232 block_no * dev->param.chunks_per_block *
233 dev->param.total_bytes_per_chunk);
236 yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
238 *state = YAFFS_BLOCK_STATE_DEAD;
241 struct yaffs_ext_tags t;
242 nandmtd2_read_chunk_tags(dev, block_no *
243 dev->param.chunks_per_block, NULL, &t);
246 *seq_number = t.seq_number;
247 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
250 *state = YAFFS_BLOCK_STATE_EMPTY;
253 yaffs_trace(YAFFS_TRACE_MTD,
254 "block is bad seq %d state %d",
255 *seq_number, *state);