+\r
+/*\r
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.\r
+ *\r
+ * Copyright (C) 2002-2007 Aleph One Ltd.\r
+ * for Toby Churchill Ltd and Brightstar Engineering\r
+ *\r
+ * Created by Charles Manning <charles@aleph1.co.uk>\r
+ *\r
+ * This program is free software; you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License version 2 as\r
+ * published by the Free Software Foundation.\r
+ */\r
+\r
+\r
+\r
+\r
+#include "yportenv.h"\r
+#include "yaffs_guts.h"\r
+#include "devextras.h"\r
+\r
+\r
+#include "yaffs_nandif.h"\r
+#include "yaffs_packedtags2.h"\r
+\r
+\r
+#if 0\r
+\r
+\r
+static unsigned char *DevBufferIn(yaffs_Device *dev)\r
+{\r
+ yfsd_WinCEDevice *cedev = (yfsd_WinCEDevice *)(dev->genericDevice);\r
+ return cedev->bufferIn;\r
+}\r
+static unsigned char *DevBufferOut(yaffs_Device *dev)\r
+{\r
+ yfsd_WinCEDevice *cedev = (yfsd_WinCEDevice *)(dev->genericDevice);\r
+ return cedev->bufferOut;\r
+}\r
+\r
+static unsigned DevBufferSize(yaffs_Device *dev)\r
+{\r
+ yfsd_WinCEDevice *cedev = (yfsd_WinCEDevice *)(dev->genericDevice);\r
+ return cedev->bufferSize;\r
+}\r
+\r
+#endif\r
+\r
+/* NB For use with inband tags....\r
+ * We assume that the data buffer is of size totalBytersPerChunk so that we can also\r
+ * use it to load the tags.\r
+ */\r
+int ynandif_WriteChunkWithTagsToNAND(yaffs_Device * dev, int chunkInNAND,\r
+ const __u8 * data,\r
+ const yaffs_ExtendedTags * tags)\r
+{\r
+\r
+ int retval = 0;\r
+ yaffs_PackedTags2 pt;\r
+ void *spare;\r
+ unsigned spareSize = 0;\r
+\r
+ unsigned char *bufferIn = DevBufferIn(dev);\r
+ unsigned char *bufferOut = DevBufferOut(dev);\r
+ unsigned bufferSize = DevBufferSize(dev);\r
+\r
+ T(YAFFS_TRACE_MTD,\r
+ (TSTR\r
+ ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p"\r
+ TENDSTR), chunkInNAND, data, tags));\r
+ \r
+\r
+ /* For yaffs2 writing there must be both data and tags.\r
+ * If we're using inband tags, then the tags are stuffed into\r
+ * the end of the data buffer.\r
+ */\r
+\r
+ if(dev->inbandTags){\r
+ yaffs_PackedTags2TagsPart *pt2tp;\r
+ pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk);\r
+ yaffs_PackTags2TagsPart(pt2tp,tags);\r
+ spare = NULL;\r
+ spareSize = 0;\r
+ }\r
+ else{\r
+ yaffs_PackTags2(&pt, tags);\r
+ spare = &pt;\r
+ spareSize = sizeof(yaffs_PackedTags2);\r
+ }\r
+ \r
+ yramsim_WritePage(chunkInNAND,\r
+ data, dev->totalBytesPerChunk, spare, spareSize);\r
+\r
+ return YAFFS_OK;\r
+}\r
+\r
+int ynandif_ReadChunkWithTagsFromNAND(yaffs_Device * dev, int chunkInNAND,\r
+ __u8 * data, yaffs_ExtendedTags * tags)\r
+{\r
+ yaffs_PackedTags2 pt;\r
+ int localData = 0;\r
+ void *spare = NULL;\r
+ unsigned spareSize;\r
+ int eccStatus; //0 = ok, 1 = fixed, -1 = unfixed\r
+\r
+ unsigned char *bufferIn = DevBufferIn(dev);\r
+ unsigned char *bufferOut = DevBufferOut(dev);\r
+ unsigned bufferSize = DevBufferSize(dev);\r
+\r
+ T(YAFFS_TRACE_MTD,\r
+ (TSTR\r
+ ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p"\r
+ TENDSTR), chunkInNAND, data, tags));\r
+ \r
+ if(!tags){\r
+ spare = NULL;\r
+ spareSize = 0;\r
+ }else if(dev->inbandTags){\r
+ \r
+ if(!data) {\r
+ localData = 1;\r
+ data = yaffs_GetTempBuffer(dev,__LINE__);\r
+ }\r
+ spare = NULL;\r
+ spareSize = 0;\r
+ }\r
+ else {\r
+ spare = &pt;\r
+ spareSize = sizeof(yaffs_PackedTags2);\r
+ }\r
+\r
+ yramsim_ReadPage(chunkInNAND,\r
+ data,data ? dev->totalBytesPerChunk : 0,\r
+ spare,spareSize,\r
+ &eccStatus);\r
+\r
+\r
+\r
+ if(dev->inbandTags){\r
+ if(tags){\r
+ yaffs_PackedTags2TagsPart * pt2tp;\r
+ pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk]; \r
+ yaffs_UnpackTags2TagsPart(tags,pt2tp);\r
+ }\r
+ }\r
+ else {\r
+ if (tags){\r
+ yaffs_UnpackTags2(tags, &pt);\r
+ }\r
+ }\r
+\r
+ if(tags && tags->chunkUsed){\r
+ if(eccStatus == 0)\r
+ tags->eccResult = YAFFS_ECC_RESULT_NO_ERROR;\r
+ else if(eccStatus < 0)\r
+ tags->eccResult = YAFFS_ECC_RESULT_UNFIXED;\r
+ else\r
+ tags->eccResult = YAFFS_ECC_RESULT_FIXED;\r
+ }\r
+\r
+ if(localData)\r
+ yaffs_ReleaseTempBuffer(dev,data,__LINE__);\r
+ \r
+ return YAFFS_OK;\r
+}\r
+\r
+int ynandif_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockId)\r
+{\r
+\r
+ yramsim_MarkBlockBad(blockId);\r
+\r
+ return YAFFS_OK;\r
+}\r
+\r
+int ynandif_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, int blockId)\r
+{\r
+\r
+ yramsim_EraseBlock(blockId);\r
+\r
+ return YAFFS_OK;\r
+}\r
+\r
+\r
+static int ynandif_IsBlockOk(struct yaffs_DeviceStruct *dev, int blockId)\r
+{\r
+ return yramsim_CheckBlockOk(blockId);\r
+}\r
+\r
+int ynandif_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockId, yaffs_BlockState *state, __u32 *sequenceNumber)\r
+{\r
+ unsigned chunkNo;\r
+ yaffs_ExtendedTags tags;\r
+\r
+ *sequenceNumber = 0;\r
+ \r
+ chunkNo = blockId * dev->nChunksPerBlock;\r
+ \r
+ if(!ynandif_IsBlockOk(dev,blockId)){\r
+ *state = YAFFS_BLOCK_STATE_DEAD;\r
+ } \r
+ else \r
+ {\r
+ ynandif_ReadChunkWithTagsFromNAND(dev,chunkNo,NULL,&tags);\r
+\r
+ if(!tags.chunkUsed)\r
+ {\r
+ *state = YAFFS_BLOCK_STATE_EMPTY;\r
+ }\r
+ else \r
+ {\r
+ *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING;\r
+ *sequenceNumber = tags.sequenceNumber;\r
+ }\r
+ }\r
+\r
+ return YAFFS_OK;\r
+}\r
+\r
+\r
+int ynandif_GetGeometry(yaffs_Device *dev, ynandif_Geometry *geometry)\r
+{\r
+\r
+ yramsim_Geometry g;\r
+\r
+ yramsim_GetGeometry(&g);\r
+ geometry->startBlock = g.startBlock;\r
+ geometry->endBlock = g.endBlock;\r
+ geometry->dataSize = g.dataSize;\r
+ geometry->spareSize = g.spareSize;\r
+ geometry->pagesPerBlock = g.pagesPerBlock;\r
+ geometry->hasECC = g.hasECC;\r
+ geometry->inbandTags = g.inbandTags;\r
+ geometry->useYaffs2 = g.useYaffs2;\r
+\r
+ return YAFFS_OK;\r
+\r
+}\r
+\r
+int ynandif_InitialiseNAND(yaffs_Device *dev)\r
+{\r
+\r
+ yramsim_Initialise();\r
+\r
+ return YAFFS_OK;\r
+}\r