233 lines
5.8 KiB
C
233 lines
5.8 KiB
C
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/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* mtd interface for YAFFS2 */
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/* XXX U-BOOT XXX */
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#include <common.h>
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#include "asm/errno.h"
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#include "yportenv.h"
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#include "yaffs_trace.h"
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#include "yaffs_mtdif2.h"
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#include "linux/mtd/mtd.h"
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#include "linux/types.h"
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#include "linux/time.h"
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#include "yaffs_trace.h"
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#include "yaffs_packedtags2.h"
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#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context))
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#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context))
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/* NB For use with inband tags....
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* We assume that the data buffer is of size total_bytes_per_chunk so
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* that we can also use it to load the tags.
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*/
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int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
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const u8 *data,
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const struct yaffs_ext_tags *tags)
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{
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struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
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struct mtd_oob_ops ops;
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int retval = 0;
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loff_t addr;
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struct yaffs_packed_tags2 pt;
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int packed_tags_size =
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dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
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void *packed_tags_ptr =
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dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
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yaffs_trace(YAFFS_TRACE_MTD,
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"nandmtd2_write_chunk_tags chunk %d data %p tags %p",
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nand_chunk, data, tags);
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addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
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/* For yaffs2 writing there must be both data and tags.
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* If we're using inband tags, then the tags are stuffed into
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* the end of the data buffer.
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*/
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if (!data || !tags)
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BUG();
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else if (dev->param.inband_tags) {
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struct yaffs_packed_tags2_tags_only *pt2tp;
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pt2tp =
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(struct yaffs_packed_tags2_tags_only *)(data +
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dev->
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data_bytes_per_chunk);
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yaffs_pack_tags2_tags_only(pt2tp, tags);
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} else {
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yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
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}
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ops.mode = MTD_OPS_AUTO_OOB;
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ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size;
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ops.len = dev->param.total_bytes_per_chunk;
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ops.ooboffs = 0;
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ops.datbuf = (u8 *) data;
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ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr;
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retval = mtd_write_oob(mtd, addr, &ops);
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk,
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u8 *data, struct yaffs_ext_tags *tags)
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{
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struct mtd_info *mtd = yaffs_dev_to_mtd(dev);
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u8 local_spare[128];
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struct mtd_oob_ops ops;
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size_t dummy;
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int retval = 0;
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int local_data = 0;
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struct yaffs_packed_tags2 pt;
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loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk;
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int packed_tags_size =
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dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt);
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void *packed_tags_ptr =
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dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt;
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yaffs_trace(YAFFS_TRACE_MTD,
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"nandmtd2_read_chunk_tags chunk %d data %p tags %p",
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nand_chunk, data, tags);
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if (dev->param.inband_tags) {
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if (!data) {
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local_data = 1;
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data = yaffs_get_temp_buffer(dev);
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}
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}
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if (dev->param.inband_tags || (data && !tags))
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retval = mtd_read(mtd, addr, dev->param.total_bytes_per_chunk,
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&dummy, data);
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else if (tags) {
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ops.mode = MTD_OPS_AUTO_OOB;
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ops.ooblen = packed_tags_size;
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ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size;
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ops.ooboffs = 0;
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ops.datbuf = data;
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ops.oobbuf = local_spare;
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retval = mtd_read_oob(mtd, addr, &ops);
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}
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if (dev->param.inband_tags) {
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if (tags) {
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struct yaffs_packed_tags2_tags_only *pt2tp;
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pt2tp =
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(struct yaffs_packed_tags2_tags_only *)
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&data[dev->data_bytes_per_chunk];
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yaffs_unpack_tags2_tags_only(tags, pt2tp);
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}
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} else {
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if (tags) {
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memcpy(packed_tags_ptr,
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local_spare,
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packed_tags_size);
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yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
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}
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}
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if (local_data)
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yaffs_release_temp_buffer(dev, data);
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if (tags && retval == -EBADMSG
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&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
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tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
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dev->n_ecc_unfixed++;
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}
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if (tags && retval == -EUCLEAN
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&& tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) {
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tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
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dev->n_ecc_fixed++;
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}
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_MarkNANDBlockBad(struct yaffs_dev *dev, int blockNo)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
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int retval;
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yaffs_trace(YAFFS_TRACE_MTD,
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"nandmtd2_MarkNANDBlockBad %d", blockNo);
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retval =
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mtd_block_markbad(mtd,
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blockNo * dev->param.chunks_per_block *
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dev->data_bytes_per_chunk);
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_QueryNANDBlock(struct yaffs_dev *dev, int blockNo,
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enum yaffs_block_state *state, u32 *sequenceNumber)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->driver_context);
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int retval;
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yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_QueryNANDBlock %d", blockNo);
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retval =
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mtd_block_isbad(mtd,
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blockNo * dev->param.chunks_per_block *
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dev->data_bytes_per_chunk);
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if (retval) {
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yaffs_trace(YAFFS_TRACE_MTD, "block is bad");
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*state = YAFFS_BLOCK_STATE_DEAD;
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*sequenceNumber = 0;
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} else {
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struct yaffs_ext_tags t;
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nandmtd2_read_chunk_tags(dev,
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blockNo *
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dev->param.chunks_per_block, NULL,
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&t);
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if (t.chunk_used) {
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*sequenceNumber = t.seq_number;
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*state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
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} else {
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*sequenceNumber = 0;
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*state = YAFFS_BLOCK_STATE_EMPTY;
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}
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}
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yaffs_trace(YAFFS_TRACE_MTD, "block is bad seq %d state %d",
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*sequenceNumber, *state);
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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