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![William Juul](/assets/img/avatar_default.png)
Direct import of yaffs as a tarball as of 20071113 from their public CVS-web at http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs2/ The code can also be imported on the command line with: export CVSROOT=:pserver:anonymous@cvs.aleph1.co.uk:/home/aleph1/cvs cvs logon (Hit return when asked for a password) cvs checkout yaffs2 Signed-off-by: William Juul <william.juul@tandberg.com> Signed-off-by: Stig Olsen <stig.olsen@tandberg.com>
259 lines
5.6 KiB
C
259 lines
5.6 KiB
C
/*
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* YAFFS: Yet another FFS. A NAND-flash specific file system.
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*
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* Copyright (C) 2002 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 1.2 2007/03/07 08:05:58 colin 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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void nandmtd2_pt2buf(yaffs_Device *dev, yaffs_PackedTags2 *pt, int is_raw)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
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__u8 *ptab = (__u8 *)pt; /* packed tags as bytes */
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int i, j = 0, k, n;
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/* Pack buffer with 0xff */
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for (i = 0; i < mtd->oobsize; i++)
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dev->spareBuffer[i] = 0xff;
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if(!is_raw){
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memcpy(dev->spareBuffer,pt,sizeof(yaffs_PackedTags2));
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} else {
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j = 0;
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k = mtd->oobinfo.oobfree[j][0];
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n = mtd->oobinfo.oobfree[j][1];
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if (n == 0) {
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T(YAFFS_TRACE_ERROR, (TSTR("No OOB space for tags" TENDSTR)));
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YBUG();
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}
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for (i = 0; i < sizeof(yaffs_PackedTags2); i++) {
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if (n == 0) {
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j++;
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k = mtd->oobinfo.oobfree[j][0];
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n = mtd->oobinfo.oobfree[j][1];
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if (n == 0) {
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T(YAFFS_TRACE_ERROR, (TSTR("No OOB space for tags" TENDSTR)));
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YBUG();
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}
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}
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dev->spareBuffer[k] = ptab[i];
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k++;
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n--;
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}
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}
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}
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void nandmtd2_buf2pt(yaffs_Device *dev, yaffs_PackedTags2 *pt, int is_raw)
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{
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struct mtd_info *mtd = (struct mtd_info *)(dev->genericDevice);
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int i, j = 0, k, n;
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__u8 *ptab = (__u8 *)pt; /* packed tags as bytes */
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if (!is_raw) {
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memcpy(pt,dev->spareBuffer,sizeof(yaffs_PackedTags2));
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} else {
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j = 0;
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k = mtd->oobinfo.oobfree[j][0];
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n = mtd->oobinfo.oobfree[j][1];
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if (n == 0) {
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T(YAFFS_TRACE_ERROR, (TSTR("No space in OOB for tags" TENDSTR)));
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YBUG();
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}
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for (i = 0; i < sizeof(yaffs_PackedTags2); i++) {
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if (n == 0) {
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j++;
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k = mtd->oobinfo.oobfree[j][0];
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n = mtd->oobinfo.oobfree[j][1];
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if (n == 0) {
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T(YAFFS_TRACE_ERROR, (TSTR("No space in OOB for tags" TENDSTR)));
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YBUG();
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}
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}
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ptab[i] = dev->spareBuffer[k];
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k++;
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n--;
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}
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}
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}
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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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size_t dummy;
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int retval = 0;
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loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
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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 (tags) {
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yaffs_PackTags2(&pt, tags);
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}
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if (data && tags) {
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nandmtd2_pt2buf(dev, &pt, 0);
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retval =
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mtd->write_ecc(mtd, addr, dev->nBytesPerChunk,
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&dummy, data, dev->spareBuffer,
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NULL);
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} else {
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T(YAFFS_TRACE_ALWAYS,
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(TSTR
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("Write chunk with null tags or data!" TENDSTR)));
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YBUG();
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}
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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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size_t dummy;
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int retval = 0;
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loff_t addr = ((loff_t) chunkInNAND) * dev->nBytesPerChunk;
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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_ReadChunkWithTagsToNAND chunk %d data %p tags %p"
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TENDSTR), chunkInNAND, data, tags));
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if (0 && data && tags) {
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retval =
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mtd->read_ecc(mtd, addr, dev->nBytesPerChunk,
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&dummy, data, dev->spareBuffer,
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NULL);
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nandmtd2_buf2pt(dev, &pt, 0);
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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->nBytesPerChunk, &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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nandmtd2_buf2pt(dev, &pt, 1);
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}
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}
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if (tags)
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yaffs_UnpackTags2(tags, &pt);
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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->nBytesPerChunk);
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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->nBytesPerChunk);
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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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T(YAFFS_TRACE_MTD,
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(TSTR("block is OK seq %d state %d" TENDSTR), *sequenceNumber,
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*state));
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}
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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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