2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2010 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 #include "yaffs_guts.h"
16 #include "devextras.h"
19 #include "yaffs_nandif.h"
20 #include "yaffs_packedtags2.h"
24 #include "yaffs_trace.h"
28 /* NB For use with inband tags....
29 * We assume that the data buffer is of size totalBytersPerChunk so that we can also
30 * use it to load the tags.
32 int ynandif_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,
34 const yaffs_ExtendedTags * tags)
40 unsigned spareSize = 0;
41 ynandif_Geometry *geometry = (ynandif_Geometry *)(dev->driverContext);
45 ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"
46 TENDSTR), chunkInNAND, data, tags));
49 /* For yaffs2 writing there must be both data and tags.
50 * If we're using inband tags, then the tags are stuffed into
51 * the end of the data buffer.
54 if(dev->param.inbandTags){
55 yaffs_PackedTags2TagsPart *pt2tp;
56 pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);
57 yaffs_PackTags2TagsPart(pt2tp,tags);
62 yaffs_PackTags2(&pt, tags,!dev->param.noTagsECC);
64 spareSize = sizeof(yaffs_PackedTags2);
67 retval = geometry->writeChunk(dev,chunkInNAND,
68 data, dev->param.totalBytesPerChunk, spare, spareSize);
73 int ynandif_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,
74 __u8 * data, yaffs_ExtendedTags * tags)
81 int eccStatus; //0 = ok, 1 = fixed, -1 = unfixed
82 ynandif_Geometry *geometry = (ynandif_Geometry *)(dev->driverContext);
86 ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"
87 TENDSTR), chunkInNAND, data, tags));
92 }else if(dev->param.inbandTags){
96 data = yaffs_GetTempBuffer(dev,__LINE__);
103 spareSize = sizeof(yaffs_PackedTags2);
106 retval = geometry->readChunk(dev,chunkInNAND,
108 data ? dev->param.totalBytesPerChunk : 0,
112 if(dev->param.inbandTags){
114 yaffs_PackedTags2TagsPart * pt2tp;
115 pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];
116 yaffs_UnpackTags2TagsPart(tags,pt2tp);
121 yaffs_UnpackTags2(tags, &pt,!dev->param.noTagsECC);
125 if(tags && tags->chunkUsed){
127 tags->eccResult == YAFFS_ECC_RESULT_UNFIXED)
128 tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;
129 else if(eccStatus > 0 ||
130 tags->eccResult == YAFFS_ECC_RESULT_FIXED)
131 tags->eccResult = YAFFS_ECC_RESULT_FIXED;
133 tags->eccResult = YAFFS_ECC_RESULT_NO_ERROR;
137 yaffs_ReleaseTempBuffer(dev,data,__LINE__);
142 int ynandif_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockId)
144 ynandif_Geometry *geometry = (ynandif_Geometry *)(dev->driverContext);
146 return geometry->markBlockBad(dev,blockId);
149 int ynandif_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, int blockId)
151 ynandif_Geometry *geometry = (ynandif_Geometry *)(dev->driverContext);
153 return geometry->eraseBlock(dev,blockId);
158 static int ynandif_IsBlockOk(struct yaffs_DeviceStruct *dev, int blockId)
160 ynandif_Geometry *geometry = (ynandif_Geometry *)(dev->driverContext);
162 return geometry->checkBlockOk(dev,blockId);
165 int ynandif_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockId, yaffs_BlockState *state, __u32 *sequenceNumber)
168 yaffs_ExtendedTags tags;
172 chunkNo = blockId * dev->param.nChunksPerBlock;
174 if(!ynandif_IsBlockOk(dev,blockId)){
175 *state = YAFFS_BLOCK_STATE_DEAD;
179 ynandif_ReadChunkWithTagsFromNAND(dev,chunkNo,NULL,&tags);
183 *state = YAFFS_BLOCK_STATE_EMPTY;
187 *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;
188 *sequenceNumber = tags.sequenceNumber;
196 int ynandif_InitialiseNAND(yaffs_Device *dev)
198 ynandif_Geometry *geometry = (ynandif_Geometry *)(dev->driverContext);
200 geometry->initialise(dev);
205 int ynandif_DeinitialiseNAND(yaffs_Device *dev)
207 ynandif_Geometry *geometry = (ynandif_Geometry *)(dev->driverContext);
209 geometry->deinitialise(dev);
215 struct yaffs_DeviceStruct *
216 yaffs_AddDeviceFromGeometry(const YCHAR *name,
217 const ynandif_Geometry *geometry)
219 YCHAR *clonedName = YMALLOC(sizeof(YCHAR) * (yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH)+1));
220 struct yaffs_DeviceStruct *dev = YMALLOC(sizeof(struct yaffs_DeviceStruct));
222 if(dev && clonedName){
223 memset(dev,0,sizeof(struct yaffs_DeviceStruct));
224 yaffs_strcpy(clonedName,name);
226 dev->param.name = clonedName;
227 dev->param.writeChunkWithTagsToNAND = ynandif_WriteChunkWithTagsToNAND;
228 dev->param.readChunkWithTagsFromNAND = ynandif_ReadChunkWithTagsFromNAND;
229 dev->param.eraseBlockInNAND = ynandif_EraseBlockInNAND;
230 dev->param.initialiseNAND = ynandif_InitialiseNAND;
231 dev->param.queryNANDBlock = ynandif_QueryNANDBlock;
232 dev->param.markNANDBlockBad = ynandif_MarkNANDBlockBad;
233 dev->param.nShortOpCaches = 20;
234 dev->param.startBlock = geometry->startBlock;
235 dev->param.endBlock = geometry->endBlock;
236 dev->param.totalBytesPerChunk = geometry->dataSize;
237 dev->param.spareBytesPerChunk = geometry->spareSize;
238 dev->param.inbandTags = geometry->inbandTags;
239 dev->param.nChunksPerBlock = geometry->pagesPerBlock;
240 dev->param.useNANDECC = geometry->hasECC;
241 dev->param.isYaffs2 = geometry->useYaffs2;
242 dev->param.nReservedBlocks = 5;
243 dev->driverContext = (void *)geometry;
245 yaffs_AddDevice(dev);