diff --git a/target/linux/xburst/files-2.6.27/drivers/mtd/udc_cache.c b/target/linux/xburst/files-2.6.27/drivers/mtd/udc_cache.c
deleted file mode 100644
index 6cb5eb416..000000000
--- a/target/linux/xburst/files-2.6.27/drivers/mtd/udc_cache.c
+++ /dev/null
@@ -1,531 +0,0 @@
-#include <linux/fs.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/vmalloc.h>
-#include <linux/hdreg.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/blktrans.h>
-#include <linux/mutex.h>
-#include <asm/jzsoc.h>
-
-#define CACHE_MAX_NUM 256
-#define SECTOR_SIZE 512
-
-//#define UDC_CACHE_DEBUG
-
-#ifdef UDC_CACHE_DEBUG
-#define dprintk(a...)   printk(a)
-#else
-#define dprintk(a...)   while(0){}
-#endif
-
-typedef struct {
-	unsigned short  CacheState;
-	unsigned short  UseCount;
-	unsigned short  CacheChange;
-	unsigned short  CacheReserve;	
-	unsigned int BlockId;
-	unsigned char   *aBlockData;
-} SSFDC__LB_CACHE;
-
-#define FREE_CACHE 0
-#define PREWRITE_CACHE 2
-#define OFTEN_USE_CACHE 3
-#define SECTOR_SHIFT          9
-
-#define CACHE_TO_UNCATCH(x) ((unsigned int)x | 0xa0000000)
-static unsigned int __aBlockData[SECTOR_SIZE * CACHE_MAX_NUM / 4] __attribute__ ((aligned (32)));
-static SSFDC__LB_CACHE ssfdc_cache[CACHE_MAX_NUM];
-static unsigned short Cur_CacheCount = 0;
-int FlushDataState = 0;
-static struct mtdblk_dev *g_udc_mtdblk;
-static struct mtd_info *g_udc_mtd;
-
-extern int udc_mtdblock_readsect(struct mtdblk_dev *, unsigned long, char *, int);
-extern int udc_mtdblock_writesect(struct mtdblk_dev *, unsigned long, char *);
-extern struct mtdblk_dev *udc_get_mtdblk(void);
-extern struct mtd_info *udc_get_mtd(void);
-extern void udc_flush_cache(struct mtdblk_dev *mtdblk);
-
-#define _NAND_LB_Write(pCache) udc_mtdblock_writesect(g_udc_mtdblk, pCache->BlockId,pCache->aBlockData)
-#define _NAND_LB_Read(Sector,pBuffer)  udc_mtdblock_readsect(g_udc_mtdblk, Sector, pBuffer, SECTOR_SIZE);
-
-#define DMA_ENABLE 0
-
-#if DMA_ENABLE
-#define DMA_CHANNEL 5
-#define PHYSADDR(x) virt_to_phys((void *)x)
-#else
-#define lb_memcpy memcpy
-#endif
-
-#if DMA_ENABLE
-static void lb_memcpy(void *target,void* source,unsigned int len)
-{
-	int ch = DMA_CHANNEL;
-	if(((unsigned int)source < 0xa0000000) && len)
-		dma_cache_wback_inv((unsigned long)source, len);
-	if(((unsigned int)target < 0xa0000000) && len)
-		dma_cache_wback_inv((unsigned long)target, len);
-
-	REG_DMAC_DSAR(ch) = PHYSADDR((unsigned long)source);       
-	REG_DMAC_DTAR(ch) = PHYSADDR((unsigned long)target);       
-	REG_DMAC_DTCR(ch) = len / 32;	            	    
-	REG_DMAC_DRSR(ch) = DMAC_DRSR_RS_AUTO;	        	
-	REG_DMAC_DCMD(ch) = DMAC_DCMD_SAI| DMAC_DCMD_DAI | DMAC_DCMD_SWDH_32 | DMAC_DCMD_DWDH_32|DMAC_DCMD_DS_32BYTE;
-	REG_DMAC_DCCSR(ch) = DMAC_DCCSR_EN | DMAC_DCCSR_NDES;
-	while (	REG_DMAC_DTCR(ch) );
-}
-#endif
-
-static void _NAND_LB_InitCache(void)
-{
-	int i;
-	SSFDC__LB_CACHE *pCache = ssfdc_cache;
-#if DMA_ENABLE
-	unsigned char * ptr = (unsigned char *)CACHE_TO_UNCATCH(__aBlockData);
-#else
-	unsigned char * ptr = (unsigned char *)(__aBlockData);
-#endif
-	for(i = 0;i < CACHE_MAX_NUM;i++)
-	{
-		pCache->CacheState = FREE_CACHE;
-		pCache->UseCount = 0;
-		pCache->CacheChange = 0;
-		pCache->aBlockData = ptr;
-		ptr+=SECTOR_SIZE;
-		pCache++;
-	}
-	Cur_CacheCount = 0;
-}
-
-static  SSFDC__LB_CACHE * _NAND_LB_GetFreeCache(void)
-{
-	int ret = 0;
-	SSFDC__LB_CACHE *pCacheInfo = &ssfdc_cache[Cur_CacheCount];
-	while(1)
-	{
-		if(ret >= CACHE_MAX_NUM)
-			return 0;
-		if(pCacheInfo >= &ssfdc_cache[CACHE_MAX_NUM])
-		{
-			pCacheInfo = ssfdc_cache;
-			Cur_CacheCount = 0;
-		}
-		
-		if(pCacheInfo->CacheState == FREE_CACHE)
-		{
-			return pCacheInfo;
-		}
-		pCacheInfo++;
-		Cur_CacheCount++;
-		ret++;
-	}
-	return 0;
-}
-
-static void _NAND_LB_CloseCACHES(unsigned int sectorstart,unsigned int sectorend)
-{
-	unsigned int i;
-	SSFDC__LB_CACHE *pCache = ssfdc_cache;
-	for( i = 0;i < CACHE_MAX_NUM;i++){
-		if((pCache->CacheState != FREE_CACHE) && (pCache->BlockId >= sectorstart) && (pCache->BlockId < sectorend)){
-			pCache->CacheChange = 0;
-			pCache->CacheState = FREE_CACHE;			    
-			pCache->UseCount = 0;
-		}
-		pCache++;
-	}
-}
-
-static void _NAND_LB_FLUSHCACHES(unsigned int sectorstart,unsigned int sectorend)
-{
-	unsigned int i;
-	SSFDC__LB_CACHE *pCache = ssfdc_cache;
-	for( i = 0;i < CACHE_MAX_NUM;i++){
-		if((pCache->CacheState != FREE_CACHE) && (pCache->BlockId >= sectorstart) && (pCache->BlockId < sectorend)){
-			if(pCache->CacheChange)
-				_NAND_LB_Write(pCache);
-			pCache->CacheChange = 0;
-			pCache->CacheState = FREE_CACHE;			    
-			pCache->UseCount = 0;
-		}
-		pCache++;
-		
-	}
-}
-
-inline static int Get_NAND_CacheFreeCount(void)
-{
-	SSFDC__LB_CACHE *pCache = ssfdc_cache;
-	SSFDC__LB_CACHE *pEndCache = &ssfdc_cache[CACHE_MAX_NUM];
-	unsigned int count = 0;
-	while(pCache < pEndCache)
-	{
-		if(pCache->CacheState == FREE_CACHE)
-			count++;
-		pCache++;
-	}
-	return count;
-	
-}
-
-static unsigned int _NAND_LB_PreWiteToNand(SSFDC__LB_CACHE *pCache,unsigned short *count,unsigned int update)
-{
-	SSFDC__LB_CACHE *pWriteCache;
-	SSFDC__LB_CACHE *pEndCache = &ssfdc_cache[CACHE_MAX_NUM];
-	unsigned int sector = -1;
-	unsigned int flag;
-	while(1)
-	{
-		sector = -1;
-		flag = 0;
-		pWriteCache = ssfdc_cache;
-		while(pWriteCache < pEndCache)
-		{
-			if(pWriteCache->CacheState == update) //PREWRITE_CACHE
-			{
-				if(pWriteCache->BlockId < sector)
-				{
-						sector = pWriteCache->BlockId;
-						pCache = pWriteCache;
-				}
-			}else
-				flag++;
-			pWriteCache++;
-		}
-		
-		if(flag < CACHE_MAX_NUM)
-		{	
-			if(pCache->CacheChange)
-			{
-				_NAND_LB_Write(pCache);
-				pCache->CacheChange = 0;
-			}
-			pCache->CacheState = FREE_CACHE;			    
-			pCache->UseCount = 0;
-			(*count)++;
-		}else
-			break;		
-	}
-	return 0;
-}
-
-static void _NAND_LB_OftenToNand(SSFDC__LB_CACHE *pCache,unsigned short *count,unsigned int update)
-{
-	SSFDC__LB_CACHE *pWriteCache = pCache;
-	SSFDC__LB_CACHE *pOldCache = pCache;
-	SSFDC__LB_CACHE *pEndCache = &ssfdc_cache[CACHE_MAX_NUM];
-
-	dprintk("%s!\n",__FUNCTION__);
-	while(pCache)
-	{
-		if(pCache->CacheState == OFTEN_USE_CACHE)
-		{
-			if(pWriteCache->CacheState != OFTEN_USE_CACHE)
-				pWriteCache = pCache;
-			else if(pWriteCache->UseCount > pCache->UseCount)
-			{
-				pWriteCache = pCache;
-			}
-		}
-		pCache++;
-		if(pCache >= pEndCache)
-			break;
-	}
-	if(pWriteCache->CacheState == OFTEN_USE_CACHE)
-	{
-		(*count)++;
-		if(pWriteCache->CacheChange)
-			_NAND_LB_Write(pWriteCache);
-		pWriteCache->CacheState = FREE_CACHE;			    
-		
-		pWriteCache->UseCount = 0;
-		pWriteCache->CacheChange = 0;
-		if(update != -1)
-			update--;
-		if(update != 0)
-			_NAND_LB_OftenToNand(pOldCache,count,update);
-	}
-}
-
-static int _NAND_LB_FreeCache(unsigned int update)
-{
-	unsigned short freecount = 0,totalfree = 0;
-	
-	freecount = 0;
-	_NAND_LB_PreWiteToNand(ssfdc_cache,&freecount,PREWRITE_CACHE);
-	
-	totalfree += freecount;
-	dprintk("free count = %d\n",freecount);
-	if(freecount == 0)
-	{
-		freecount = 0;	
-		_NAND_LB_PreWiteToNand(ssfdc_cache,&freecount,OFTEN_USE_CACHE);
-		totalfree += freecount;
-		update = 0;
-	}	
-	if(update)
-	{	
-		if(Get_NAND_CacheFreeCount() < CACHE_MAX_NUM * 1 / 4) // because fat is 4 sector
-		{
-			freecount = 0;	
-			_NAND_LB_PreWiteToNand(ssfdc_cache,&freecount,OFTEN_USE_CACHE);
-			totalfree += freecount;
-		}
-	}
-	
-	dprintk("Free = %d\r\n",totalfree);
-	return totalfree;
-}
-
-static int _NAND_LB_GetFromCache(unsigned int Sector, void *pBuffer) {
-
-	SSFDC__LB_CACHE *pCache = &ssfdc_cache[Cur_CacheCount];
-	SSFDC__LB_CACHE *pUseCache = 0;
-	unsigned short i;
-	dprintk("sector = %x pBuffer = %x\n",Sector,pBuffer);
-	if(pCache >= &ssfdc_cache[CACHE_MAX_NUM])
-		pCache = ssfdc_cache;
-	
-	i = 0;
-	while (1) {
-		if(pCache->CacheState != FREE_CACHE)
-		{
-			if (Sector == pCache->BlockId)  {
-				dprintk("Cache is use = %d\r\n",pCache->BlockId);
-				pUseCache = pCache;
-				pCache->UseCount++;
-				if(pCache->UseCount == 0)
-					pCache->UseCount = -1;
-				pCache->CacheState = OFTEN_USE_CACHE;
-			}
-		}
-		pCache--;
-		if(pCache < ssfdc_cache)
-			pCache = &ssfdc_cache[CACHE_MAX_NUM - 1];
-		
-		i++;
-		if (i >= CACHE_MAX_NUM) {
-			break;  /* Sector not in cache */
-		}
-	}
-	if (pUseCache) {
-		dprintk("From Cache %d\r\n",Sector);
-		lb_memcpy(pBuffer, pUseCache->aBlockData, SECTOR_SIZE);
-		return 0;
-	}
-	return -1;  
-}
-
-static void _NAND_LB_ClearCache(void) {
-	
-	unsigned short freecount = 0;
-	dprintk("Clear Cache\r\n");
-	
-	_NAND_LB_PreWiteToNand(ssfdc_cache,&freecount,PREWRITE_CACHE);
-	_NAND_LB_PreWiteToNand(ssfdc_cache,&freecount,OFTEN_USE_CACHE);
-}
-
-static void _NAND_LB_CopyToCache(unsigned int Sector, void *pBuffer,unsigned short rw) 
-{
-	SSFDC__LB_CACHE *pCache = _NAND_LB_GetFreeCache();
-	dprintk("Copy to Cache = 0x%08x 0x%08x\r\n",pCache,ssfdc_cache);
-	
-	if(!pCache)
-	{
-		_NAND_LB_FreeCache(rw);
-		
-		pCache = _NAND_LB_GetFreeCache();
-	}
-	pCache->BlockId = Sector;
-	pCache->CacheState = PREWRITE_CACHE;
-	pCache->UseCount = 0;
-	pCache->CacheChange = rw;
-	
-	lb_memcpy(pCache->aBlockData,pBuffer,SECTOR_SIZE);
-}
-
-
-static int _NAND_LB_UpdateInCache(unsigned int Sector, void *pBuffer) {
-	short i,ret = 0;
-	i =  Cur_CacheCount;
-	if(Cur_CacheCount > CACHE_MAX_NUM)
-		i = 0;
-	while(1)
-	{
-		if(ret >= CACHE_MAX_NUM)
-			return -1;
-		if(ssfdc_cache[i].CacheState != FREE_CACHE)
-		{
-			
-			if(ssfdc_cache[i].BlockId == Sector)
-			{
-				dprintk("UpdateInCache = %d\r\n",Sector);
-				ssfdc_cache[i].CacheState = OFTEN_USE_CACHE;
-				ssfdc_cache[i].UseCount++;
-				ssfdc_cache[i].CacheChange = 1;
-				lb_memcpy(ssfdc_cache[i].aBlockData,pBuffer,SECTOR_SIZE);
-				return 0;
-			}
-		}
-		i--;
-		if(i < 0)
-			i = CACHE_MAX_NUM - 1;
-		ret++;
-	}
-	return -1;
-}
-
-static int NAND_LB_MultiRead(unsigned int Sector, void *pBuffer,unsigned int SectorCount) 
-{
-	int i,ret,end;
-	void *p;
-
-	dprintk("NAND_LB_MultiRead = %d %d \n",Sector,SectorCount);
-	end = Sector + SectorCount;
-	_NAND_LB_FLUSHCACHES(Sector,end);
-
-	p = pBuffer;
-	for (i = Sector; i < end; i ++)
-	{
-		ret = udc_mtdblock_readsect(g_udc_mtdblk, i, p, SECTOR_SIZE);
-		p += SECTOR_SIZE;
-	}
-	return ret;
-}
-
-static int NAND_LB_Read(unsigned int Sector, void *pBuffer) 
-{
-	int x;
-#if DMA_ENABLE
-	unsigned char *ptr = (unsigned char *)CACHE_TO_UNCATCH(pBuffer);
-	dma_cache_wback_inv(pBuffer,SECTOR_SIZE);
-#else
-	unsigned char *ptr = (unsigned char *)pBuffer;
-#endif
-	dprintk("LB_Read = %d \n",Sector);
-	if(_NAND_LB_GetFromCache(Sector,ptr))
-	{
-		x =  _NAND_LB_Read(Sector,ptr);
-		_NAND_LB_CopyToCache(Sector,ptr,0);
-	}
-	return 512;
-}
-
-static int NAND_LB_MultiWrite(unsigned int Sector, void *pBuffer,unsigned int SectorCount) 
-{
-	int i,ret;
-	unsigned char *p;
-
-	_NAND_LB_CloseCACHES(Sector,Sector + SectorCount);
-	p = (unsigned char *)pBuffer;
-	for (i = Sector; i < Sector + SectorCount; i ++)
-	{
-		ret = udc_mtdblock_writesect(g_udc_mtdblk, i, p);
-		p += 512;
-	}
-	return ret;
-}
-
-static int NAND_LB_Write(unsigned int Sector, void *pBuffer) 
-{
-#if DMA_ENABLE
-	unsigned char *ptr = (unsigned char *)CACHE_TO_UNCATCH(pBuffer);
-	dma_cache_wback_inv(pBuffer,SECTOR_SIZE);
-#else
-	unsigned char *ptr = (unsigned char *)pBuffer;
-#endif
-	dprintk("LB_Write = %x %x\r\n",Sector,pBuffer);
-	if(_NAND_LB_UpdateInCache(Sector,ptr))
-	{
-		_NAND_LB_CopyToCache(Sector,ptr,1);
-	}
-	return 512;
-}
-/*********************************************************************
-*
-*             Global functions
-*
-***********************************************************************/
-
-int NAND_LB_Init(void) 
-{
-	dprintk("UDC CACHE Init \n");
-	_NAND_LB_InitCache();	
-	g_udc_mtdblk = udc_get_mtdblk();
-	g_udc_mtd = udc_get_mtd();
-	return 0;
-}
-
-int NAND_LB_FLASHCACHE(void) 
-{
-	dprintk("Flush lb cache !\n");
-	_NAND_LB_ClearCache();
-//	dprintk("Flush mtd cache !\n");
-//	udc_flush_cache(g_udc_mtdblk);
-	return 0;
-}
-
-int NAND_MTD_FLASHCACHE(void) 
-{
-	dprintk("Flush mtd cache !\n");
-	udc_flush_cache(g_udc_mtdblk);
-	return 0;
-}
-
-int udc_read(unsigned int offset, unsigned int len, unsigned char *buf)
-{
-	unsigned long block,sector,i;
-
-	block = offset >> SECTOR_SHIFT;
-	sector = len >> SECTOR_SHIFT;
-	dprintk("read dev = ia:%x, s:%d c:%d\r\n",buf,block,sector);
-
-	if (sector <= 8)
-	{
-		for(i = 0;i < sector; i++)
-		{
-			NAND_LB_Read(block + i,(void *)(buf));
-			buf += 512;
-		}
-	}
-	else
-		NAND_LB_MultiRead(block, buf, sector);
-
-	return len;
-}
-
-int udc_write(unsigned int offset, unsigned int len, unsigned char *buf)
-{
-	unsigned long block,sector,i;
-
-	block = offset >> SECTOR_SHIFT;
-	sector = len >> SECTOR_SHIFT;
-	dprintk("write dev s:%d c:%d\r\n",block,sector);
-
-	if(sector <= 8)
-	{
-		for(i = 0;i < sector; i++)		
-		{
-			NAND_LB_Write(block + i,(void *)(buf));
-			buf += 512;
-			FlushDataState = 1;
-		}
-	}else
-		NAND_LB_MultiWrite(block,(void *)(buf),sector);
-	
-	return len;
-}
-
-EXPORT_SYMBOL_GPL(udc_write);
-EXPORT_SYMBOL_GPL(udc_read);
-EXPORT_SYMBOL_GPL(NAND_LB_Init);
-EXPORT_SYMBOL_GPL(NAND_LB_FLASHCACHE);
-EXPORT_SYMBOL_GPL(FlushDataState);
-EXPORT_SYMBOL_GPL(NAND_MTD_FLASHCACHE);