-/*
- * 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.
- */
-
-#include "yportenv.h"
-#include "yaffs_guts.h"
-
-
-#include "yaffs_nandif.h"
-#include "yaffs_packedtags2.h"
-
-#include "yramsim.h"
-
-#include "yaffs_trace.h"
-#include "yaffsfs.h"
-
-
-/* NB For use with inband tags....
- * We assume that the data buffer is of size totalBytersPerChunk so that
- * we can also use it to load the tags.
- */
-int ynandif_WriteChunkWithTagsToNAND(struct yaffs_dev *dev, int nand_chunk,
- const u8 *data,
- const struct yaffs_ext_tags *tags)
-{
-
- int retval = 0;
- struct yaffs_packed_tags2 pt;
- void *spare;
- unsigned spareSize = 0;
- struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
-
- yaffs_trace(YAFFS_TRACE_MTD,
- "nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p",
- nand_chunk, data, tags);
-
-
- /* 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 (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);
- spare = NULL;
- spareSize = 0;
- } else {
- yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc);
- spare = &pt;
- spareSize = sizeof(struct yaffs_packed_tags2);
- }
-
- retval = geometry->writeChunk(dev, nand_chunk,
- data, dev->param.total_bytes_per_chunk,
- spare, spareSize);
-
- return retval;
-}
-
-int ynandif_ReadChunkWithTagsFromNAND(struct yaffs_dev *dev, int nand_chunk,
- u8 *data, struct yaffs_ext_tags *tags)
-{
- struct yaffs_packed_tags2 pt;
- int localData = 0;
- void *spare = NULL;
- unsigned spareSize;
- int retval = 0;
- int eccStatus; /* 0 = ok, 1 = fixed, -1 = unfixed */
- struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
-
- yaffs_trace(YAFFS_TRACE_MTD,
- "nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p",
- nand_chunk, data, tags);
-
- if (!tags) {
- spare = NULL;
- spareSize = 0;
- } else if (dev->param.inband_tags) {
-
- if (!data) {
- localData = 1;
- data = yaffs_get_temp_buffer(dev);
- }
- spare = NULL;
- spareSize = 0;
- } else {
- spare = &pt;
- spareSize = sizeof(struct yaffs_packed_tags2);
- }
-
- retval = geometry->readChunk(dev, nand_chunk,
- data,
- data ? dev->param.total_bytes_per_chunk : 0,
- spare, spareSize,
- &eccStatus);
-
- if (dev->param.inband_tags) {
- if (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)
- yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc);
- }
-
- if (tags && tags->chunk_used) {
- if (eccStatus < 0 ||
- tags->ecc_result == YAFFS_ECC_RESULT_UNFIXED)
- tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED;
- else if (eccStatus > 0 ||
- tags->ecc_result == YAFFS_ECC_RESULT_FIXED)
- tags->ecc_result = YAFFS_ECC_RESULT_FIXED;
- else
- tags->ecc_result = YAFFS_ECC_RESULT_NO_ERROR;
- }
-
- if (localData)
- yaffs_release_temp_buffer(dev, data);
-
- return retval;
-}
-
-int ynandif_MarkNANDBlockBad(struct yaffs_dev *dev, int blockId)
-{
- struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
-
- return geometry->markBlockBad(dev, blockId);
-}
-
-int ynandif_EraseBlockInNAND(struct yaffs_dev *dev, int blockId)
-{
- struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
-
- return geometry->eraseBlock(dev, blockId);
-
-}
-
-
-static int ynandif_IsBlockOk(struct yaffs_dev *dev, int blockId)
-{
- struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
-
- return geometry->checkBlockOk(dev, blockId);
-}
-
-int ynandif_QueryNANDBlock(struct yaffs_dev *dev, int blockId,
- enum yaffs_block_state *state, u32 *seq_number)
-{
- unsigned chunkNo;
- struct yaffs_ext_tags tags;
-
- *seq_number = 0;
-
- chunkNo = blockId * dev->param.chunks_per_block;
-
- if (!ynandif_IsBlockOk(dev, blockId)) {
- *state = YAFFS_BLOCK_STATE_DEAD;
- } else {
- ynandif_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &tags);
-
- if (!tags.chunk_used) {
- *state = YAFFS_BLOCK_STATE_EMPTY;
- } else {
- *state = YAFFS_BLOCK_STATE_NEEDS_SCAN;
- *seq_number = tags.seq_number;
- }
- }
-
- return YAFFS_OK;
-}
-
-
-int ynandif_InitialiseNAND(struct yaffs_dev *dev)
-{
- struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
-
- geometry->initialise(dev);
-
- return YAFFS_OK;
-}
-
-int ynandif_Deinitialise_flash_fn(struct yaffs_dev *dev)
-{
- struct ynandif_Geometry *geometry = (struct ynandif_Geometry *)(dev->driver_context);
-
- geometry->deinitialise(dev);
-
- return YAFFS_OK;
-}
-
-
-struct yaffs_dev *
- yaffs_add_dev_from_geometry(const YCHAR *name,
- const struct ynandif_Geometry *geometry)
-{
- YCHAR *clonedName = malloc(sizeof(YCHAR) *
- (strnlen(name, YAFFS_MAX_NAME_LENGTH)+1));
- struct yaffs_dev *dev = malloc(sizeof(struct yaffs_dev));
- struct yaffs_param *param;
-
- if (dev && clonedName) {
- memset(dev, 0, sizeof(struct yaffs_dev));
- strcpy(clonedName, name);
-
- param = &dev->param;
-
- param->name = clonedName;
- param->write_chunk_tags_fn = ynandif_WriteChunkWithTagsToNAND;
- param->read_chunk_tags_fn = ynandif_ReadChunkWithTagsFromNAND;
- param->erase_fn = ynandif_EraseBlockInNAND;
- param->initialise_flash_fn = ynandif_InitialiseNAND;
- param->query_block_fn = ynandif_QueryNANDBlock;
- param->bad_block_fn = ynandif_MarkNANDBlockBad;
- param->n_caches = 20;
- param->start_block = geometry->start_block;
- param->end_block = geometry->end_block;
- param->total_bytes_per_chunk = geometry->dataSize;
- param->spare_bytes_per_chunk = geometry->spareSize;
- param->inband_tags = geometry->inband_tags;
- param->chunks_per_block = geometry->pagesPerBlock;
- param->use_nand_ecc = geometry->hasECC;
- param->is_yaffs2 = geometry->useYaffs2;
- param->n_reserved_blocks = 5;
- dev->driver_context = (void *)geometry;
-
- yaffs_add_device(dev);
-
- return dev;
- }
-
- free(dev);
- free(clonedName);
-
- return NULL;
-}
-
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