+++ /dev/null
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2007 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 1.17 2007-02-14 01:09:06 wookey 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"
-
-int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
- const __u8 * data,
- const yaffs_ExtendedTags * tags)
-{
- struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
- struct mtd_oob_ops ops;
-#else
- size_t dummy;
-#endif
- int retval = 0;
-
- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-
- yaffs_PackedTags2 pt;
-
- T(YAFFS_TRACE_MTD,
- (TSTR
- ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
- TENDSTR), chunkInNAND, data, tags));
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
- if (tags)
- yaffs_PackTags2(&pt, tags);
- else
- BUG(); /* both tags and data should always be present */
-
- if (data) {
- ops.mode = MTD_OOB_AUTO;
- ops.ooblen = sizeof(pt);
- ops.len = dev->nDataBytesPerChunk;
- ops.ooboffs = 0;
- ops.datbuf = (__u8 *)data;
- ops.oobbuf = (void *)&pt;
- retval = mtd->write_oob(mtd, addr, &ops);
- } else
- BUG(); /* both tags and data should always be present */
-#else
- if (tags) {
- yaffs_PackTags2(&pt, tags);
- }
-
- if (data && tags) {
- if (dev->useNANDECC)
- retval =
- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, (__u8 *) & pt, NULL);
- else
- retval =
- mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, (__u8 *) & pt, NULL);
- } else {
- if (data)
- retval =
- mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
- data);
- if (tags)
- retval =
- mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
- (__u8 *) & pt);
-
- }
-#endif
-
- 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);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
- struct mtd_oob_ops ops;
-#endif
- size_t dummy;
- int retval = 0;
-
- loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
-
- yaffs_PackedTags2 pt;
-
- T(YAFFS_TRACE_MTD,
- (TSTR
- ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
- TENDSTR), chunkInNAND, data, tags));
-
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
- if (data && !tags)
- retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data);
- else if (tags) {
- ops.mode = MTD_OOB_AUTO;
- ops.ooblen = sizeof(pt);
- ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
- ops.ooboffs = 0;
- ops.datbuf = data;
- ops.oobbuf = dev->spareBuffer;
- retval = mtd->read_oob(mtd, addr, &ops);
- }
-#else
- if (data && tags) {
- if (dev->useNANDECC) {
- retval =
- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, dev->spareBuffer,
- NULL);
- } else {
- retval =
- mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
- &dummy, data, dev->spareBuffer,
- NULL);
- }
- } else {
- if (data)
- retval =
- mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
- data);
- if (tags)
- retval =
- mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
- dev->spareBuffer);
- }
-#endif
-
- memcpy(&pt, dev->spareBuffer, sizeof(pt));
-
- if (tags)
- yaffs_UnpackTags2(tags, &pt);
-
- if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
- tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
-
- 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->nDataBytesPerChunk);
-
- 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->nDataBytesPerChunk);
-
- 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 bad seq %d state %d" TENDSTR), *sequenceNumber,
- *state));
-
- if (retval == 0)
- return YAFFS_OK;
- else
- return YAFFS_FAIL;
-}
-
projects / openwrt / openwrt.git / blobdiff