--- /dev/null
+/*
+ * 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;
+}
Code Review / kvmfornfv.git / blobdiff