+++ /dev/null
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2011 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@aleph1.co.uk>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/* mtd interface for YAFFS2 */
-
-#include "yportenv.h"
-#include "yaffs_trace.h"
-#include "yaffs_mtdif2.h"
-#include "yaffs_packedtags2.h"
-#include "yaffs_linux.h"
-#include "linux/mtd/mtd.h"
-#include "linux/types.h"
-#include "linux/time.h"
-#include "mtd/mtd-abi.h"
-
-
-/* NB For use with inband tags....
- * We assume that the data buffer is of size total_bytes_per_chunk so that
- * we can also use it to load the tags.
- */
-int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
- const u8 *data,
- const struct yaffs_ext_tags *tags)
-{
- struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
- struct mtd_oob_ops ops;
- int retval = 0;
- loff_t addr;
- struct yaffs_packed_tags2 pt;
- int packed_tags_size =
- dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
- void *packed_tags_ptr =
- dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-
- yaffs_trace(YAFFS_TRACE_MTD,
- "nandmtd2_write_chunk_tags chunk %d data %p tags %p",
- nand_chunk, data, tags);
-
- addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
-
- /* For yaffs2 writing there must be both data and tags.
- * If we're using inband tags, then the tags are stuffed into
- * the end of the data buffer.
- */
- if (!data || !tags)
- BUG();
- else if (dev->param.inband_tags) {
- struct yaffs_packed_tags2_tags_only *pt2tp;
-
- pt2tp =
- (struct yaffs_packed_tags2_tags_only *)
- (data + dev->data_bytes_per_chunk);
- yaffs_pack_tags2_tags_only(pt2tp, tags);
- } else {
- yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
- }
-
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size;
- ops.len = dev->param.total_bytes_per_chunk;
- ops.ooboffs = 0;
- ops.datbuf = (u8 *) data;
- ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
- retval = mtd->write_oob(mtd, addr, &ops);
-
- if (retval == 0)
- return YAFFS_OK;
-
- return YAFFS_FAIL;
-}
-
-int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
- u8 *data, struct yaffs_ext_tags *tags)
-{
- struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
- struct mtd_oob_ops ops;
- size_t dummy;
- int retval = 0;
- int local_data = 0;
- loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
- struct yaffs_packed_tags2 pt;
- int packed_tags_size =
- dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
- void *packed_tags_ptr =
- dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
-
- yaffs_trace(YAFFS_TRACE_MTD,
- "nandmtd2_read_chunk_tags chunk %d data %p tags %p",
- nand_chunk, data, tags);
-
- if (dev->param.inband_tags && !data) {
- local_data = 1;
- data = yaffs_get_temp_buffer(dev);
- }
-
- if (dev->param.inband_tags || (data && !tags)) {
- retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk,
- &dummy, data);
- } else if (tags) {
- ops.mode = MTD_OPS_AUTO_OOB;
- ops.ooblen = packed_tags_size;
- ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size;
- ops.ooboffs = 0;
- ops.datbuf = data;
- ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer;
- retval = mtd->read_oob(mtd, addr, &ops);
- }
-
- if (dev->param.inband_tags && tags) {
- struct yaffs_packed_tags2_tags_only *pt2tp;
-
- pt2tp =
- (struct yaffs_packed_tags2_tags_only *)
- &data[dev->data_bytes_per_chunk];
- yaffs_unpack_tags2_tags_only(tags, pt2tp);
- } else if (tags) {
- memcpy(packed_tags_ptr,
- yaffs_dev_to_lc(dev)->spare_buffer,
- packed_tags_size);
- yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
- }
-
- if (local_data)
- yaffs_release_temp_buffer(dev, data);
-
- if (tags && retval == -EBADMSG &&
- tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
- tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
- dev->n_ecc_unfixed++;
- }
- if (tags && retval == -EUCLEAN &&
- tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
- tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
- dev->n_ecc_fixed++;
- }
-
- if (retval == 0)
- return YAFFS_OK;
-
- return YAFFS_FAIL;
-}
-
-int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no)
-{
- struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
- int retval;
-
- yaffs_trace(YAFFS_TRACE_MTD,
- "nandmtd2_mark_block_bad %d", block_no);
-
- retval =
- mtd->block_markbad(mtd,
- block_no * dev->param.chunks_per_block *
- dev->param.total_bytes_per_chunk);
-
- if (retval == 0)
- return YAFFS_OK;
-
- return YAFFS_FAIL;
-}
-
-int nandmtd2_query_block(struct yaffs_dev *dev, int block_no,
- enum yaffs_block_state *state, u32 * seq_number)
-{
- struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
- int retval;
-
- yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no);
- retval =
- mtd->block_isbad(mtd,
- block_no * dev->param.chunks_per_block *
- dev->param.total_bytes_per_chunk);
-
- if (retval) {
- yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
-
- *state = YAFFS_BLOCK_STATE_DEAD;
- *seq_number = 0;
- } else {
- struct yaffs_ext_tags t;
-
- nandmtd2_read_chunk_tags(dev, block_no *
- dev->param.chunks_per_block, NULL, &t);
-
- if (t.chunk_used) {
- *seq_number = t.seq_number;
- *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
- } else {
- *seq_number = 0;
- *state = YAFFS_BLOCK_STATE_EMPTY;
- }
- }
- yaffs_trace(YAFFS_TRACE_MTD,
- "block is bad seq %d state %d", *seq_number, *state);
-
- if (retval == 0)
- return YAFFS_OK;
-
- return YAFFS_FAIL;
-}
projects / yaffs2.git / blobdiff