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    Subject[PATCH 17/29] Staging: yaffs2: yaffs_nand: Add files
    Date
    Adding files to yaffs2 directory.

    Signed-off-by: Tracey Dent <tdent48227@gmail.com>
    ---
    drivers/staging/yaffs2/yaffs_nand.c | 140 +++++++++++++++++++++++++++++++++++
    drivers/staging/yaffs2/yaffs_nand.h | 44 +++++++++++
    2 files changed, 184 insertions(+), 0 deletions(-)
    create mode 100644 drivers/staging/yaffs2/yaffs_nand.c
    create mode 100644 drivers/staging/yaffs2/yaffs_nand.h

    diff --git a/drivers/staging/yaffs2/yaffs_nand.c b/drivers/staging/yaffs2/yaffs_nand.c
    new file mode 100644
    index 0000000..d721fa6
    --- /dev/null
    +++ b/drivers/staging/yaffs2/yaffs_nand.c
    @@ -0,0 +1,140 @@
    +/*
    + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
    + *
    + * Copyright (C) 2002-2010 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.
    + */
    +
    +#include "yaffs_nand.h"
    +#include "yaffs_tagscompat.h"
    +#include "yaffs_tagsvalidity.h"
    +
    +#include "yaffs_getblockinfo.h"
    +
    +int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk,
    + __u8 *buffer,
    + yaffs_ext_tags *tags)
    +{
    + int result;
    + yaffs_ext_tags local_tags;
    +
    + int realigned_chunk = nand_chunk - dev->chunk_offset;
    +
    + dev->n_page_reads++;
    +
    + /* If there are no tags provided, use local tags to get prioritised gc working */
    + if (!tags)
    + tags = &local_tags;
    +
    + if (dev->param.read_chunk_tags_fn)
    + result = dev->param.read_chunk_tags_fn(dev, realigned_chunk, buffer,
    + tags);
    + else
    + result = yaffs_tags_compat_rd(dev,
    + realigned_chunk,
    + buffer,
    + tags);
    + if (tags &&
    + tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) {
    +
    + yaffs_block_info_t *bi;
    + bi = yaffs_get_block_info(dev, nand_chunk/dev->param.chunks_per_block);
    + yaffs_handle_chunk_error(dev, bi);
    + }
    +
    + return result;
    +}
    +
    +int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev,
    + int nand_chunk,
    + const __u8 *buffer,
    + yaffs_ext_tags *tags)
    +{
    +
    + dev->n_page_writes++;
    +
    + nand_chunk -= dev->chunk_offset;
    +
    +
    + if (tags) {
    + tags->seq_number = dev->seq_number;
    + tags->chunk_used = 1;
    + if (!yaffs_validate_tags(tags)) {
    + T(YAFFS_TRACE_ERROR,
    + (TSTR("Writing uninitialised tags" TENDSTR)));
    + YBUG();
    + }
    + T(YAFFS_TRACE_WRITE,
    + (TSTR("Writing chunk %d tags %d %d" TENDSTR), nand_chunk,
    + tags->obj_id, tags->chunk_id));
    + } else {
    + T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR)));
    + YBUG();
    + }
    +
    + if (dev->param.write_chunk_tags_fn)
    + return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer,
    + tags);
    + else
    + return yaffs_tags_compat_wr(dev,
    + nand_chunk,
    + buffer,
    + tags);
    +}
    +
    +int yaffs_mark_bad(yaffs_dev_t *dev, int block_no)
    +{
    + block_no -= dev->block_offset;
    +
    +
    + if (dev->param.bad_block_fn)
    + return dev->param.bad_block_fn(dev, block_no);
    + else
    + return yaffs_tags_compat_mark_bad(dev, block_no);
    +}
    +
    +int yaffs_query_init_block_state(yaffs_dev_t *dev,
    + int block_no,
    + yaffs_block_state_t *state,
    + __u32 *seq_number)
    +{
    + block_no -= dev->block_offset;
    +
    + if (dev->param.query_block_fn)
    + return dev->param.query_block_fn(dev, block_no, state, seq_number);
    + else
    + return yaffs_tags_compat_query_block(dev, block_no,
    + state,
    + seq_number);
    +}
    +
    +
    +int yaffs_erase_block(struct yaffs_dev_s *dev,
    + int flash_block)
    +{
    + int result;
    +
    + flash_block -= dev->block_offset;
    +
    + dev->n_erasures++;
    +
    + result = dev->param.erase_fn(dev, flash_block);
    +
    + return result;
    +}
    +
    +int yaffs_init_nand(struct yaffs_dev_s *dev)
    +{
    + if(dev->param.initialise_flash_fn)
    + return dev->param.initialise_flash_fn(dev);
    + return YAFFS_OK;
    +}
    +
    +
    +
    diff --git a/drivers/staging/yaffs2/yaffs_nand.h b/drivers/staging/yaffs2/yaffs_nand.h
    new file mode 100644
    index 0000000..24cd147
    --- /dev/null
    +++ b/drivers/staging/yaffs2/yaffs_nand.h
    @@ -0,0 +1,44 @@
    +/*
    + * YAFFS: Yet another Flash File System . A NAND-flash specific file system.
    + *
    + * Copyright (C) 2002-2010 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 Lesser General Public License version 2.1 as
    + * published by the Free Software Foundation.
    + *
    + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL.
    + */
    +
    +#ifndef __YAFFS_NAND_H__
    +#define __YAFFS_NAND_H__
    +#include "yaffs_guts.h"
    +
    +
    +
    +int yaffs_rd_chunk_tags_nand(yaffs_dev_t *dev, int nand_chunk,
    + __u8 *buffer,
    + yaffs_ext_tags *tags);
    +
    +int yaffs_wr_chunk_tags_nand(yaffs_dev_t *dev,
    + int nand_chunk,
    + const __u8 *buffer,
    + yaffs_ext_tags *tags);
    +
    +int yaffs_mark_bad(yaffs_dev_t *dev, int block_no);
    +
    +int yaffs_query_init_block_state(yaffs_dev_t *dev,
    + int block_no,
    + yaffs_block_state_t *state,
    + unsigned *seq_number);
    +
    +int yaffs_erase_block(struct yaffs_dev_s *dev,
    + int flash_block);
    +
    +int yaffs_init_nand(struct yaffs_dev_s *dev);
    +
    +#endif
    +
    --
    1.7.3.2.146.gca209


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