/*
- * YAFFS: Yet another FFS. A NAND-flash specific file system.
- * yaffs_ramdisk.c: yaffs ram disk component
+ * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
*
- * Copyright (C) 2002 Aleph One Ltd.
+ * Copyright (C) 2002-2007 Aleph One Ltd.
+ * for Toby Churchill Ltd and Brightstar Engineering
*
* Created by Charles Manning <charles@aleph1.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
*/
-// This provides a YAFFS nand emulation on a file for emulating 2kB pages.
-// THis is only intended as test code to test persistence etc.
+/*
+ * 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 1.7 2006-10-13 08:52:49 charles Exp $";
+const char *yaffs_flashif_c_version = "$Id: yaffs_fileem2k.c,v 1.12 2007-02-14 01:09:06 wookey Exp $";
#include "yportenv.h"
#include "yaffs_fileem2k.h"
#include "yaffs_packedtags2.h"
-
+//#define SIMULATE_FAILURES
typedef struct
{
int yaffs_testPartialWrite = 0;
+
+
+static __u8 localBuffer[PAGE_SIZE];
+
static char *NToName(char *buf,int n)
{
sprintf(buf,"emfile%d",n);
int written;
int pos;
int h;
+ int i;
+ int nRead;
+ int error;
+ T(YAFFS_TRACE_MTD,(TSTR("write chunk %d data %x tags %x" TENDSTR),chunkInNAND,(unsigned)data, (unsigned)tags));
+
CheckInit();
h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
lseek(h,pos,SEEK_SET);
- written = write(h,data,dev->nDataBytesPerChunk);
+ nRead = read(h, localBuffer,dev->nDataBytesPerChunk);
+ for(i = error = 0; i < dev->nDataBytesPerChunk && !error; i++){
+ if(localBuffer[i] != 0xFF){
+ printf("nand simulation: chunk %d data byte %d was %0x2\n",
+ chunkInNAND,i,localBuffer[i]);
+ error = 1;
+ }
+ }
+
+ for(i = 0; i < dev->nDataBytesPerChunk; i++)
+ localBuffer[i] &= data[i];
+
+ if(memcmp(localBuffer,data,dev->nDataBytesPerChunk))
+ printf("nand simulator: data does not match\n");
+
+ lseek(h,pos,SEEK_SET);
+ written = write(h,localBuffer,dev->nDataBytesPerChunk);
if(yaffs_testPartialWrite){
close(h);
exit(1);
}
+#ifdef SIMULATE_FAILURES
+ if((chunkInNAND >> 6) == 100)
+ written = 0;
+
+ if((chunkInNAND >> 6) == 110)
+ written = 0;
+#endif
+
+
if(written != dev->nDataBytesPerChunk) return YAFFS_FAIL;
}
h = filedisk.handle[(chunkInNAND / (PAGES_PER_BLOCK * BLOCKS_PER_HANDLE))];
lseek(h,pos,SEEK_SET);
+
if( 0 && dev->isYaffs2)
{
{
yaffs_PackedTags2 pt;
yaffs_PackTags2(&pt,tags);
-
- written = write(h,&pt,sizeof(pt));
+ __u8 * ptab = (__u8 *)&pt;
+
+ nRead = read(h,localBuffer,sizeof(pt));
+ for(i = error = 0; i < sizeof(pt) && !error; i++){
+ if(localBuffer[i] != 0xFF){
+ printf("nand simulation: chunk %d oob byte %d was %0x2\n",
+ chunkInNAND,i,localBuffer[i]);
+ error = 1;
+ }
+ }
+
+ for(i = 0; i < sizeof(pt); i++)
+ localBuffer[i] &= ptab[i];
+
+ if(memcmp(localBuffer,&pt,sizeof(pt)))
+ printf("nand sim: tags corruption\n");
+
+ lseek(h,pos,SEEK_SET);
+
+ written = write(h,localBuffer,sizeof(pt));
if(written != sizeof(pt)) return YAFFS_FAIL;
}
}
static int fail300 = 1;
static int fail320 = 1;
+static int failRead10 = 2;
+
int yflash_ReadChunkWithTagsFromNAND(yaffs_Device *dev,int chunkInNAND, __u8 *data, yaffs_ExtendedTags *tags)
{
int nread;
int pos;
int h;
+ T(YAFFS_TRACE_MTD,(TSTR("read chunk %d data %x tags %x" TENDSTR),chunkInNAND,(unsigned)data, (unsigned)tags));
+
CheckInit();
lseek(h,pos,SEEK_SET);
nread = read(h,data,dev->nDataBytesPerChunk);
+
if(nread != dev->nDataBytesPerChunk) return YAFFS_FAIL;
}
yaffs_PackedTags2 pt;
nread= read(h,&pt,sizeof(pt));
yaffs_UnpackTags2(tags,&pt);
- if((chunkInNAND >> 6) == 300) {
+#ifdef SIMULATE_FAILURES
+ if((chunkInNAND >> 6) == 100) {
if(fail300 && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR){
tags->eccResult = YAFFS_ECC_RESULT_FIXED;
fail300 = 0;
}
}
- if((chunkInNAND >> 6) == 320) {
+ if((chunkInNAND >> 6) == 110) {
if(fail320 && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR){
tags->eccResult = YAFFS_ECC_RESULT_FIXED;
fail320 = 0;
}
}
+#endif
+ if(failRead10>0 && chunkInNAND == 10){
+ failRead10--;
+ nread = 0;
+ }
+
if(nread != sizeof(pt)) return YAFFS_FAIL;
}
}
CheckInit();
+ printf("erase block %d\n",blockNumber);
+
if(blockNumber == 320)
fail320 = 1;