259 lines
5.6 KiB
C
259 lines
5.6 KiB
C
/*
|
|
* 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;
|
|
}
|
|
|