u-boot/fs/yaffs2/yaffs_nandif.c
Charles Manning 753ac61088 u-boot: Update yaffs2 file system
This patch updates the yaffs2 in u-boot to correspond to
git://www.aleph1.co.uk/yaffs2
commit id 9ee5d0643e559568dbe62215f76e0a7bd5a63d93

Signed-off-by: Charles Manning <cdhmanning@gmail.com>
2012-08-09 23:39:18 +02:00

252 lines
6.3 KiB
C

/*
* 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;
}