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add generic 2.6.26 patches/files
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11323 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
kaloz
232
target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_mtdif2.c
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232
target/linux/generic-2.6/files-2.6.26/fs/yaffs2/yaffs_mtdif2.c
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@@ -0,0 +1,232 @@
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/*
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* YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
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*
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* Copyright (C) 2002-2007 Aleph One Ltd.
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* for Toby Churchill Ltd and Brightstar Engineering
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*
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* Created by Charles Manning <charles@aleph1.co.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* mtd interface for YAFFS2 */
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const char *yaffs_mtdif2_c_version =
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"$Id: yaffs_mtdif2.c,v 1.17 2007-02-14 01:09:06 wookey Exp $";
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#include "yportenv.h"
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#include "yaffs_mtdif2.h"
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#include "linux/mtd/mtd.h"
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#include "linux/types.h"
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#include "linux/time.h"
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#include "yaffs_packedtags2.h"
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int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
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const __u8 * data,
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const yaffs_ExtendedTags * tags)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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struct mtd_oob_ops ops;
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#else
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size_t dummy;
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#endif
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int retval = 0;
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loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
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yaffs_PackedTags2 pt;
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T(YAFFS_TRACE_MTD,
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(TSTR
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("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
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TENDSTR), chunkInNAND, data, tags));
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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if (tags)
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yaffs_PackTags2(&pt, tags);
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else
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BUG(); /* both tags and data should always be present */
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if (data) {
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ops.mode = MTD_OOB_AUTO;
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ops.ooblen = sizeof(pt);
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ops.len = dev->nDataBytesPerChunk;
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ops.ooboffs = 0;
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ops.datbuf = (__u8 *)data;
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ops.oobbuf = (void *)&pt;
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retval = mtd->write_oob(mtd, addr, &ops);
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} else
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BUG(); /* both tags and data should always be present */
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#else
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if (tags) {
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yaffs_PackTags2(&pt, tags);
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}
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if (data && tags) {
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if (dev->useNANDECC)
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retval =
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mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
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&dummy, data, (__u8 *) & pt, NULL);
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else
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retval =
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mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk,
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&dummy, data, (__u8 *) & pt, NULL);
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} else {
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if (data)
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retval =
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mtd->write(mtd, addr, dev->nDataBytesPerChunk, &dummy,
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data);
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if (tags)
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retval =
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mtd->write_oob(mtd, addr, mtd->oobsize, &dummy,
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(__u8 *) & pt);
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}
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#endif
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
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__u8 * data, yaffs_ExtendedTags * tags)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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struct mtd_oob_ops ops;
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#endif
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size_t dummy;
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int retval = 0;
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loff_t addr = ((loff_t) chunkInNAND) * dev->nDataBytesPerChunk;
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yaffs_PackedTags2 pt;
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T(YAFFS_TRACE_MTD,
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(TSTR
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("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
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TENDSTR), chunkInNAND, data, tags));
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#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,17))
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if (data && !tags)
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retval = mtd->read(mtd, addr, dev->nDataBytesPerChunk,
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&dummy, data);
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else if (tags) {
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ops.mode = MTD_OOB_AUTO;
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ops.ooblen = sizeof(pt);
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ops.len = data ? dev->nDataBytesPerChunk : sizeof(pt);
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ops.ooboffs = 0;
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ops.datbuf = data;
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ops.oobbuf = dev->spareBuffer;
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retval = mtd->read_oob(mtd, addr, &ops);
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}
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#else
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if (data && tags) {
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if (dev->useNANDECC) {
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retval =
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mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
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&dummy, data, dev->spareBuffer,
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NULL);
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} else {
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retval =
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mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk,
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&dummy, data, dev->spareBuffer,
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NULL);
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}
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} else {
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if (data)
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retval =
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mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy,
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data);
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if (tags)
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retval =
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mtd->read_oob(mtd, addr, mtd->oobsize, &dummy,
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dev->spareBuffer);
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}
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#endif
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memcpy(&pt, dev->spareBuffer, sizeof(pt));
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if (tags)
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yaffs_UnpackTags2(tags, &pt);
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if(tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR)
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tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
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int retval;
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T(YAFFS_TRACE_MTD,
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(TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo));
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retval =
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mtd->block_markbad(mtd,
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blockNo * dev->nChunksPerBlock *
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dev->nDataBytesPerChunk);
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo,
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yaffs_BlockState * state, int *sequenceNumber)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
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int retval;
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T(YAFFS_TRACE_MTD,
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(TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo));
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retval =
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mtd->block_isbad(mtd,
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blockNo * dev->nChunksPerBlock *
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dev->nDataBytesPerChunk);
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if (retval) {
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T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR)));
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*state = YAFFS_BLOCK_STATE_DEAD;
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*sequenceNumber = 0;
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} else {
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yaffs_ExtendedTags t;
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nandmtd2_ReadChunkWithTagsFromNAND(dev,
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blockNo *
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dev->nChunksPerBlock, NULL,
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&t);
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if (t.chunkUsed) {
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*sequenceNumber = t.sequenceNumber;
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*state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
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} else {
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*sequenceNumber = 0;
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*state = YAFFS_BLOCK_STATE_EMPTY;
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}
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}
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T(YAFFS_TRACE_MTD,
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(TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber,
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*state));
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if (retval == 0)
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return YAFFS_OK;
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else
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return YAFFS_FAIL;
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}
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