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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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