From 6e1aa6e45c847913adc75b4b9f4625534418b519 Mon Sep 17 00:00:00 2001 From: Mirko Vogt Date: Tue, 18 Aug 2009 18:17:43 +0200 Subject: [PATCH] the forgotten one :) --- .../files-2.6.27/drivers/mtd/udc_cache.c | 531 ------------------ 1 file changed, 531 deletions(-) delete mode 100644 target/linux/xburst/files-2.6.27/drivers/mtd/udc_cache.c 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#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);