// This provides a YAFFS nand emulation on a file for emulating 2kB pages.
// THis is only intended as test code to test persistence etc.
-const char *yaffs_flashif_c_version = "$Id: yaffs_fileem2k.c,v 1.3 2005-07-03 05:48:11 charles Exp $";
+const char *yaffs_flashif_c_version = "$Id: yaffs_fileem2k.c,v 1.7 2006-10-13 08:52:49 charles Exp $";
#include "yportenv.h"
+#define MAX_HANDLES 20
+#define BLOCKS_PER_HANDLE 8000
+
typedef struct
{
- int handle;
+ int handle[MAX_HANDLES];
int nBlocks;
} yflash_Device;
static yflash_Device filedisk;
-static int CheckInit(yaffs_Device *dev)
+int yaffs_testPartialWrite = 0;
+
+
+static char *NToName(char *buf,int n)
{
- static int initialised = 0;
+ sprintf(buf,"emfile%d",n);
+ return buf;
+}
+
+static char dummyBuffer[BLOCK_SIZE];
+
+static int GetBlockFileHandle(int n)
+{
+ int h;
+ int requiredSize;
+ char name[40];
+ NToName(name,n);
+ int fSize;
+ int i;
+
+ h = open(name, O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
+ if(h >= 0){
+ fSize = lseek(h,0,SEEK_END);
+ requiredSize = BLOCKS_PER_HANDLE * BLOCK_SIZE;
+ if(fSize < requiredSize){
+ for(i = 0; i < BLOCKS_PER_HANDLE; i++)
+ if(write(h,dummyBuffer,BLOCK_SIZE) != BLOCK_SIZE)
+ return -1;
+
+ }
+ }
+
+ return h;
+
+}
+
+static int CheckInit(void)
+{
+ static int initialised = 0;
+ int h;
int i;
- int fSize;
+ off_t fSize;
+ off_t requiredSize;
int written;
+ int blk;
yflash_Page p;
initialised = 1;
+ memset(dummyBuffer,0xff,sizeof(dummyBuffer));
- filedisk.nBlocks = SIZE_IN_MB * BLOCKS_PER_MB;
-
- filedisk.handle = open("yaffsemfile2k", O_RDWR | O_CREAT, S_IREAD | S_IWRITE);
-
- if(filedisk.handle < 0)
- {
- perror("Failed to open yaffs emulation file");
- return YAFFS_FAIL;
- }
+ filedisk.nBlocks = SIZE_IN_MB * BLOCKS_PER_MB;
+
+ for(i = 0; i < MAX_HANDLES; i++)
+ filedisk.handle[i] = -1;
- fSize = lseek(filedisk.handle,0,SEEK_END);
+ for(i = 0,blk = 0; blk < filedisk.nBlocks; blk+=BLOCKS_PER_HANDLE,i++)
+ filedisk.handle[i] = GetBlockFileHandle(i);
- if(fSize < filedisk.nBlocks * BLOCK_SIZE)
- {
- printf("Creating yaffs emulation file\n");
-
- lseek(filedisk.handle,0,SEEK_SET);
-
- memset(&p,0xff,sizeof(yflash_Page));
-
- for(i = 0; i < filedisk.nBlocks * BLOCK_SIZE; i+= PAGE_SIZE)
- {
- written = write(filedisk.handle,&p,sizeof(yflash_Page));
-
- if(written != sizeof(yflash_Page))
- {
- printf("Write failed\n");
- return YAFFS_FAIL;
- }
- }
- }
return 1;
}
+
+int yflash_GetNumberOfBlocks(void)
+{
+ CheckInit();
+
+ return filedisk.nBlocks;
+}
+
int yflash_WriteChunkWithTagsToNAND(yaffs_Device *dev,int chunkInNAND,const __u8 *data, yaffs_ExtendedTags *tags)
{
int written;
int pos;
-
- CheckInit(dev);
+ int h;
+
+ CheckInit();
if(data)
{
- pos = chunkInNAND * PAGE_SIZE;
- lseek(filedisk.handle,pos,SEEK_SET);
- written = write(filedisk.handle,data,dev->nBytesPerChunk);
+ pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
+ h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
+
+ lseek(h,pos,SEEK_SET);
+ written = write(h,data,dev->nDataBytesPerChunk);
- if(written != dev->nBytesPerChunk) return YAFFS_FAIL;
+ if(yaffs_testPartialWrite){
+ close(h);
+ exit(1);
+ }
+
+ if(written != dev->nDataBytesPerChunk) return YAFFS_FAIL;
}
if(tags)
{
- pos = chunkInNAND * PAGE_SIZE + PAGE_DATA_SIZE;
- lseek(filedisk.handle,pos,SEEK_SET);
+ pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE ;
+ h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
+
+ lseek(h,pos,SEEK_SET);
if( 0 && dev->isYaffs2)
{
- written = write(filedisk.handle,tags,sizeof(yaffs_ExtendedTags));
+ written = write(h,tags,sizeof(yaffs_ExtendedTags));
if(written != sizeof(yaffs_ExtendedTags)) return YAFFS_FAIL;
}
else
yaffs_PackedTags2 pt;
yaffs_PackTags2(&pt,tags);
- written = write(filedisk.handle,&pt,sizeof(pt));
+ written = write(h,&pt,sizeof(pt));
if(written != sizeof(pt)) return YAFFS_FAIL;
}
}
}
-int yflash_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
-{
- int written;
-
- yaffs_PackedTags2 pt;
-
- CheckInit(dev);
-
- memset(&pt,0,sizeof(pt));
- lseek(filedisk.handle,(blockNo * dev->nChunksPerBlock) * PAGE_SIZE + PAGE_DATA_SIZE,SEEK_SET);
- written = write(filedisk.handle,&pt,sizeof(pt));
-
- if(written != sizeof(pt)) return YAFFS_FAIL;
-
-
- return YAFFS_OK;
-
-}
-
int yaffs_CheckAllFF(const __u8 *ptr, int n)
{
while(n)
}
+static int fail300 = 1;
+static int fail320 = 1;
+
int yflash_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags)
{
int nread;
int pos;
-
- CheckInit(dev);
+ int h;
+
+ CheckInit();
if(data)
{
- pos = chunkInNAND * PAGE_SIZE;
- lseek(filedisk.handle,pos,SEEK_SET);
- nread = read(filedisk.handle,data,dev->nBytesPerChunk);
+
+ pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE;
+ h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
+ lseek(h,pos,SEEK_SET);
+ nread = read(h,data,dev->nDataBytesPerChunk);
- if(nread != dev->nBytesPerChunk) return YAFFS_FAIL;
+ if(nread != dev->nDataBytesPerChunk) return YAFFS_FAIL;
}
if(tags)
{
- pos = chunkInNAND * PAGE_SIZE + PAGE_DATA_SIZE;
- lseek(filedisk.handle,pos,SEEK_SET);
+ pos = (chunkInNAND % (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE)) * PAGE_SIZE + PAGE_DATA_SIZE;
+ h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
+ lseek(h,pos,SEEK_SET);
+
if(0 && dev->isYaffs2)
{
- nread= read(filedisk.handle,tags,sizeof(yaffs_ExtendedTags));
+ nread= read(h,tags,sizeof(yaffs_ExtendedTags));
if(nread != sizeof(yaffs_ExtendedTags)) return YAFFS_FAIL;
if(yaffs_CheckAllFF((__u8 *)tags,sizeof(yaffs_ExtendedTags)))
{
else
{
yaffs_PackedTags2 pt;
- nread= read(filedisk.handle,&pt,sizeof(pt));
+ nread= read(h,&pt,sizeof(pt));
yaffs_UnpackTags2(tags,&pt);
+ if((chunkInNAND >> 6) == 300) {
+ if(fail300 && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR){
+ tags->eccResult = YAFFS_ECC_RESULT_FIXED;
+ fail300 = 0;
+ }
+
+ }
+ if((chunkInNAND >> 6) == 320) {
+ if(fail320 && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR){
+ tags->eccResult = YAFFS_ECC_RESULT_FIXED;
+ fail320 = 0;
+ }
+ }
if(nread != sizeof(pt)) return YAFFS_FAIL;
}
}
}
+int yflash_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo)
+{
+ int written;
+ int h;
+
+ yaffs_PackedTags2 pt;
+
+ CheckInit();
+
+ memset(&pt,0,sizeof(pt));
+ h = filedisk.handle[(blockNo / ( BLOCKS_PER_HANDLE))];
+ lseek(h,((blockNo % BLOCKS_PER_HANDLE) * dev->nChunksPerBlock) * PAGE_SIZE + PAGE_DATA_SIZE,SEEK_SET);
+ written = write(h,&pt,sizeof(pt));
+
+ if(written != sizeof(pt)) return YAFFS_FAIL;
+
+
+ return YAFFS_OK;
+
+}
+
int yflash_EraseBlockInNAND(yaffs_Device *dev, int blockNumber)
{
int i;
+ int h;
- CheckInit(dev);
+ CheckInit();
+
+ if(blockNumber == 320)
+ fail320 = 1;
if(blockNumber < 0 || blockNumber >= filedisk.nBlocks)
{
memset(pg,0xff,syz);
- pos = lseek(filedisk.handle, blockNumber * dev->nChunksPerBlock * PAGE_SIZE, SEEK_SET);
-
+
+ h = filedisk.handle[(blockNumber / ( BLOCKS_PER_HANDLE))];
+ lseek(h,((blockNumber % BLOCKS_PER_HANDLE) * dev->nChunksPerBlock) * PAGE_SIZE,SEEK_SET);
for(i = 0; i < dev->nChunksPerBlock; i++)
{
- write(filedisk.handle,pg,PAGE_SIZE);
+ write(h,pg,PAGE_SIZE);
}
- pos = lseek(filedisk.handle, 0,SEEK_CUR);
+ pos = lseek(h, 0,SEEK_CUR);
return YAFFS_OK;
}
int yflash_InitialiseNAND(yaffs_Device *dev)
{
- CheckInit(dev);
+ CheckInit();
return YAFFS_OK;
}
projects / yaffs2.git / blobdiff