X-Git-Url: http://www.aleph1.co.uk/gitweb/?a=blobdiff_plain;f=yaffs_fileem.c;h=dd77b37fca0fd0ab946a6b241c2ff5abce38b1af;hb=e7944bf67d156b9ecb1c8cdf9223dfb0e3154ba4;hp=dbbe5f8b3a4d593d68f767e82a3ffad5fbc9094e;hpb=aa39fbf7616e8b26833a09cb64c6a40859494599;p=yaffs%2F.git

diff --git a/yaffs_fileem.c b/yaffs_fileem.c
index dbbe5f8..dd77b37 100644
--- a/yaffs_fileem.c
+++ b/yaffs_fileem.c
@@ -54,6 +54,62 @@ static int IsAMarkedBadBlock(int blk)
 }
 
 
+static __u8 yaffs_WriteFailCorruption(int chunkInNAND)
+{
+	switch(chunkInNAND)
+	{
+		case 2000:
+		case 2003:
+		case 3000:
+		case 3001:
+					return 3;// ding two bits
+		case 2001:
+		case 3003:
+		case 3004:
+		case 3005:
+		case 3006:
+		case 3007:  return 1;// ding one bit
+		
+		default: return 0;
+		
+	}
+}
+
+static void yaffs_ModifyWriteData(int chunkInNAND,__u8 *data)
+{
+	if(data)
+	{
+		*data ^= yaffs_WriteFailCorruption(chunkInNAND);	
+	}
+}
+
+static __u8 yaffs_ReadFailCorruption(int chunkInNAND)
+{
+	switch(chunkInNAND)
+	{
+		case 500:
+					return 3;// ding two bits
+		case 700:
+		case 750:
+					return 1;// ding one bit
+		
+		default: return 0;
+		
+	}
+}
+
+static void yaffs_ModifyReadData(int chunkInNAND,__u8 *data)
+{
+	if(data)
+	{
+		*data ^= yaffs_ReadFailCorruption(chunkInNAND);	
+	}
+}
+
+
+
+
+
 static void  CheckInit(yaffs_Device *dev)
 {
 	static int initialised = 0;
@@ -100,6 +156,8 @@ static void  CheckInit(yaffs_Device *dev)
 
 int yaffs_FEWriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_Spare *spare)
 {
+	__u8 localData[512];
+	
 	int pos;
 	
 	pos = chunkInNAND * 528;
@@ -109,8 +167,10 @@ int yaffs_FEWriteChunkToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data,
 	
 	if(data)
 	{
+		memcpy(localData,data,512);
+		yaffs_ModifyWriteData(chunkInNAND,localData);
 		lseek(h,pos,SEEK_SET);
-		write(h,data,512);
+		write(h,localData,512);
 	}
 	
 	pos += 512;
@@ -138,6 +198,7 @@ int yaffs_FEReadChunkFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaf
 	{
 		lseek(h,pos,SEEK_SET);
 		read(h,data,512);
+		yaffs_ModifyReadData(chunkInNAND,data);
 	}
 	
 	pos += 512;
@@ -168,6 +229,13 @@ int yaffs_FEEraseBlockInNAND(yaffs_Device *dev,int blockInNAND)
 	{
 		write(h,ffChunk,528);
 	}
+	
+	switch(blockInNAND)
+	{
+		case 10: 
+		case 15: return YAFFS_FAIL;
+		
+	}
 	return YAFFS_OK;
 }