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Date: Mon, 1 Nov 2010 14:41:03 -0400
From: Tracey Dent <tdent48227@...il.com>
To: greg@...ah.com
Cc: manningc2@...rix.gen.nz, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org, Tracey Dent <tdent48227@...il.com>
Subject: [PATCH 15/29] Staging: yaffs2: yaffs_mtdif2: Add files
Adding files to yaffs2 directory.
Signed-off-by: Tracey Dent <tdent48227@...il.com>
---
drivers/staging/yaffs2/yaffs_mtdif2.c | 256 +++++++++++++++++++++++++++++++++
drivers/staging/yaffs2/yaffs_mtdif2.h | 29 ++++
2 files changed, 285 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/yaffs2/yaffs_mtdif2.c
create mode 100644 drivers/staging/yaffs2/yaffs_mtdif2.h
diff --git a/drivers/staging/yaffs2/yaffs_mtdif2.c b/drivers/staging/yaffs2/yaffs_mtdif2.c
new file mode 100644
index 0000000..1c60a44
--- /dev/null
+++ b/drivers/staging/yaffs2/yaffs_mtdif2.c
@@ -0,0 +1,256 @@
+/*
+ * 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@...ph1.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 "linux/mtd/mtd.h"
+#include "linux/types.h"
+#include "linux/time.h"
+
+#include "yaffs_packedtags2.h"
+
+#include "yaffs_linux.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(yaffs_dev_t *dev, int nand_chunk,
+ const __u8 *data,
+ const yaffs_ext_tags *tags)
+{
+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ struct mtd_oob_ops ops;
+#else
+ size_t dummy;
+#endif
+ int retval = 0;
+
+ loff_t addr;
+
+ 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;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_write_chunk_tags chunk %d data %p tags %p"
+ TENDSTR), 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) {
+ yaffs_packed_tags2_tags_only *pt2tp;
+ pt2tp = (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);
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ ops.mode = MTD_OOB_AUTO;
+ 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);
+
+#else
+ if (!dev->param.inband_tags) {
+ retval =
+ mtd->write_ecc(mtd, addr, dev->data_bytes_per_chunk,
+ &dummy, data, (__u8 *) packed_tags_ptr, NULL);
+ } else {
+ retval =
+ mtd->write(mtd, addr, dev->param.total_bytes_per_chunk, &dummy,
+ data);
+ }
+#endif
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd2_read_chunk_tags(yaffs_dev_t *dev, int nand_chunk,
+ __u8 *data, yaffs_ext_tags *tags)
+{
+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17))
+ struct mtd_oob_ops ops;
+#endif
+ size_t dummy;
+ int retval = 0;
+ int local_data = 0;
+
+ loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
+
+ 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;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR
+ ("nandmtd2_read_chunk_tags chunk %d data %p tags %p"
+ TENDSTR), nand_chunk, data, tags));
+
+ if (dev->param.inband_tags) {
+
+ if (!data) {
+ local_data = 1;
+ data = yaffs_get_temp_buffer(dev, __LINE__);
+ }
+
+
+ }
+
+
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17))
+ 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_OOB_AUTO;
+ 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);
+ }
+#else
+ if (!dev->param.inband_tags && data && tags) {
+
+ retval = mtd->read_ecc(mtd, addr, dev->data_bytes_per_chunk,
+ &dummy, data, dev->spare_buffer,
+ NULL);
+ } else {
+ if (data)
+ retval =
+ mtd->read(mtd, addr, dev->data_bytes_per_chunk, &dummy,
+ data);
+ if (!dev->param.inband_tags && tags)
+ retval =
+ mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
+ dev->spare_buffer);
+ }
+#endif
+
+
+ if (dev->param.inband_tags) {
+ if (tags) {
+ yaffs_packed_tags2_tags_only *pt2tp;
+ pt2tp = (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, __LINE__);
+
+ 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;
+ else
+ return YAFFS_FAIL;
+}
+
+int nandmtd2_mark_block_bad(struct yaffs_dev_s *dev, int block_no)
+{
+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+ int retval;
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_mark_block_bad %d" TENDSTR), 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;
+ else
+ return YAFFS_FAIL;
+
+}
+
+int nandmtd2_query_block(struct yaffs_dev_s *dev, int block_no,
+ yaffs_block_state_t *state, __u32 *seq_number)
+{
+ struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
+ int retval;
+
+ T(YAFFS_TRACE_MTD,
+ (TSTR("nandmtd2_query_block %d" TENDSTR), block_no));
+ retval =
+ mtd->block_isbad(mtd,
+ block_no * dev->param.chunks_per_block *
+ dev->param.total_bytes_per_chunk);
+
+ if (retval) {
+ T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
+
+ *state = YAFFS_BLOCK_STATE_DEAD;
+ *seq_number = 0;
+ } else {
+ 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_SCANNING;
+ } else {
+ *seq_number = 0;
+ *state = YAFFS_BLOCK_STATE_EMPTY;
+ }
+ }
+ T(YAFFS_TRACE_MTD,
+ (TSTR("block is bad seq %d state %d" TENDSTR), *seq_number,
+ *state));
+
+ if (retval == 0)
+ return YAFFS_OK;
+ else
+ return YAFFS_FAIL;
+}
+
diff --git a/drivers/staging/yaffs2/yaffs_mtdif2.h b/drivers/staging/yaffs2/yaffs_mtdif2.h
new file mode 100644
index 0000000..b33b84d
--- /dev/null
+++ b/drivers/staging/yaffs2/yaffs_mtdif2.h
@@ -0,0 +1,29 @@
+/*
+ * 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@...ph1.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_MTDIF2_H__
+#define __YAFFS_MTDIF2_H__
+
+#include "yaffs_guts.h"
+int nandmtd2_write_chunk_tags(yaffs_dev_t *dev, int nand_chunk,
+ const __u8 *data,
+ const yaffs_ext_tags *tags);
+int nandmtd2_read_chunk_tags(yaffs_dev_t *dev, int nand_chunk,
+ __u8 *data, yaffs_ext_tags *tags);
+int nandmtd2_mark_block_bad(struct yaffs_dev_s *dev, int block_no);
+int nandmtd2_query_block(struct yaffs_dev_s *dev, int block_no,
+ yaffs_block_state_t *state, __u32 *seq_number);
+
+#endif
--
1.7.3.2.146.gca209
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