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/*
* YAFFS: Yet another FFS. A NAND-flash specific file system.
*
* Copyright (C) 2002 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.
*/
/* mtd interface for YAFFS2 */
const char *yaffs_mtdif2_c_version =
"$Id: yaffs_mtdif2.c,v 1.2 2007/03/07 08:05:58 colin Exp $";
#include "yportenv.h"
#include "yaffs_mtdif2.h"
#include "linux/mtd/mtd.h"
#include "linux/types.h"
#include "linux/time.h"
#include "yaffs_packedtags2.h"
void nandmtd2_pt2buf(yaffs_Device *dev, yaffs_PackedTags2 *pt, int is_raw)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
__u8 *ptab = (__u8 *)pt; /* packed tags as bytes */
int i, j = 0, k, n;
/* Pack buffer with 0xff */
for (i = 0; i < mtd->oobsize; i++)
dev->spareBuffer[i] = 0xff;
if(!is_raw){
memcpy(dev->spareBuffer,pt,sizeof(yaffs_PackedTags2));
} else {
j = 0;
k = mtd->oobinfo.oobfree[j][0];
n = mtd->oobinfo.oobfree[j][1];
if (n == 0) {
T(YAFFS_TRACE_ERROR, (TSTR("No OOB space for tags" TENDSTR)));
YBUG();
}
for (i = 0; i < sizeof(yaffs_PackedTags2); i++) {
if (n == 0) {
j++;
k = mtd->oobinfo.oobfree[j][0];
n = mtd->oobinfo.oobfree[j][1];
if (n == 0) {
T(YAFFS_TRACE_ERROR, (TSTR("No OOB space for tags" TENDSTR)));
YBUG();
}
}
dev->spareBuffer[k] = ptab[i];
k++;
n--;
}
}
}
void nandmtd2_buf2pt(yaffs_Device *dev, yaffs_PackedTags2 *pt, int is_raw)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
int i, j = 0, k, n;
__u8 *ptab = (__u8 *)pt; /* packed tags as bytes */
if (!is_raw) {
memcpy(pt,dev->spareBuffer,sizeof(yaffs_PackedTags2));
} else {
j = 0;
k = mtd->oobinfo.oobfree[j][0];
n = mtd->oobinfo.oobfree[j][1];
if (n == 0) {
T(YAFFS_TRACE_ERROR, (TSTR("No space in OOB for tags" TENDSTR)));
YBUG();
}
for (i = 0; i < sizeof(yaffs_PackedTags2); i++) {
if (n == 0) {
j++;
k = mtd->oobinfo.oobfree[j][0];
n = mtd->oobinfo.oobfree[j][1];
if (n == 0) {
T(YAFFS_TRACE_ERROR, (TSTR("No space in OOB for tags" TENDSTR)));
YBUG();
}
}
ptab[i] = dev->spareBuffer[k];
k++;
n--;
}
}
}
int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
const __u8 * data,
const yaffs_ExtendedTags * tags)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
size_t dummy;
int retval = 0;
loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
yaffs_PackedTags2 pt;
T(YAFFS_TRACE_MTD,
(TSTR
("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
TENDSTR), chunkInNAND, data, tags));
if (tags) {
yaffs_PackTags2(&pt, tags);
}
if (data && tags) {
nandmtd2_pt2buf(dev, &pt, 0);
retval =
mtd->write_ecc(mtd, addr, dev->nBytesPerChunk,
&dummy, data, dev->spareBuffer,
NULL);
} else {
T(YAFFS_TRACE_ALWAYS,
(TSTR
("Write chunk with null tags or data!" TENDSTR)));
YBUG();
}
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
__u8 * data, yaffs_ExtendedTags * tags)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
size_t dummy;
int retval = 0;
loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
yaffs_PackedTags2 pt;
T(YAFFS_TRACE_MTD,
(TSTR
("nandmtd2_ReadChunkWithTagsToNAND chunk %d data %p tags %p"
TENDSTR), chunkInNAND, data, tags));
if (0 && data && tags) {
retval =
mtd->read_ecc(mtd, addr, dev->nBytesPerChunk,
&dummy, data, dev->spareBuffer,
NULL);
nandmtd2_buf2pt(dev, &pt, 0);
} else {
if (data)
retval =
mtd->read(mtd, addr, dev->nBytesPerChunk, &dummy,
data);
if (tags) {
retval =
mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
dev->spareBuffer);
nandmtd2_buf2pt(dev, &pt, 1);
}
}
if (tags)
yaffs_UnpackTags2(tags, &pt);
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
int retval;
T(YAFFS_TRACE_MTD,
(TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
retval =
mtd->block_markbad(mtd,
blockNo * dev->nChunksPerBlock *
dev->nBytesPerChunk);
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
yaffs_BlockState * state, int *sequenceNumber)
{
struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
int retval;
T(YAFFS_TRACE_MTD,
(TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
retval =
mtd->block_isbad(mtd,
blockNo * dev->nChunksPerBlock *
dev->nBytesPerChunk);
if (retval) {
T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
*state = YAFFS_BLOCK_STATE_DEAD;
*sequenceNumber = 0;
} else {
yaffs_ExtendedTags t;
nandmtd2_ReadChunkWithTagsFromNAND(dev,
blockNo *
dev->nChunksPerBlock, NULL,
&t);
if (t.chunkUsed) {
*sequenceNumber = t.sequenceNumber;
*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
} else {
*sequenceNumber = 0;
*state = YAFFS_BLOCK_STATE_EMPTY;
}
T(YAFFS_TRACE_MTD,
(TSTR("block is OK seq %d state %d" TENDSTR), *sequenceNumber,
*state));
}
if (retval == 0)
return YAFFS_OK;
else
return YAFFS_FAIL;
}
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