nandflash.c

启动代码

  Nand_SysInfo.Nand_LogPerPhy = chipInfo.phy_page_size/NFC_LOG_PAGE_SIZE;
  Nand_SysInfo.log_spare_size = NFC_LOG_SPARE_SIZE;
  Nand_SysInfo.Fs_Info_size = NFC_FS_INFO_SIZE;
  Nand_SysInfo.log_page_size = NFC_LOG_PAGE_SIZE;
 
  Nand_SysInfo.log_page_per_blk = Nand_SysInfo.Nand_LogPerPhy * chipInfo.phy_page_per_blk;
  Nand_SysInfo.log_page_per_blk_shift = getShiftNum(Nand_SysInfo.log_page_per_blk);
  Nand_SysInfo.phypage_per_chip = chipInfo.phy_page_per_blk * chipInfo.chip_blk_num;
  Nand_SysInfo.phypage_shift_num = getShiftNum(Nand_SysInfo.phypage_per_chip);
  Nand_SysInfo.chip_logpage_num = chipInfo.chip_blk_num*Nand_SysInfo.log_page_per_blk;
  Nand_SysInfo.total_blk_num = chipInfo.chip_blk_num * chipInfo.count;
  Nand_SysInfo.total_group_num = Nand_SysInfo.total_blk_num / chipInfo.group_blk_num;
  Nand_SysInfo.total_phypage_num = Nand_SysInfo.total_blk_num * chipInfo.phy_page_per_blk;
  Nand_SysInfo.total_logpage_num = Nand_SysInfo.log_page_per_blk * Nand_SysInfo.total_blk_num;

//  bNandInit = AK_TRUE;
  return NF_SUCCESS;
}



/**
* @BRIEF read one logic page to nandflash with ECC.
*   total 518B valide data: incude 512Byte data and 6Byte file system information.
*   hardware check ECC code.
* @AUTHOR dengjian
* @DATE 2006-1-4
* @PARAM LogPage:logic page number.
*  *data:pointer of data buffer
   *FS_info:pointer of fs information
* @RETURN
* @RETVAL
*/
//***********************************************************************************
//tip:chip select by mtd manager, this driver just read current chip page data
//***********************************************************************************
T_S16 nf_read_frame(T_U32 frame,T_U8 *data,T_U8 *fs_info)
{
  T_U8 chip;
  T_U32 status;
  T_U16 j;
  T_U32 columnAddr, rowAddr;

  if( (data == AK_NULL) && (fs_info == AK_NULL))
  {
    printf("\r\nnand dirver read:all of fs_info and data is AK_NULL\r\n");
    return NF_SUCCESS;//because mtd would handle error block,just alert,only write faile return falsereturn AK_FALSE;
    }

  if( frame >= Nand_SysInfo.total_logpage_num )
  {
    printf("\r\n nand read addr error, frame(%d)/total(%d)\r\n",frame,Nand_SysInfo.total_logpage_num);
    //memset(data, 0xFF, Nand_frameSize);
    return NF_SUCCESS;//because mtd would handle error block,just alert,only write faile return false
    }

  //calculate column address and row address
  chip = (T_U8)(frame/Nand_SysInfo.chip_logpage_num);
  rowAddr = (frame%Nand_SysInfo.chip_logpage_num) / Nand_SysInfo.Nand_LogPerPhy;
  columnAddr = ( frame % Nand_SysInfo.Nand_LogPerPhy ) *  (Nand_SysInfo.log_page_size + Nand_SysInfo.log_spare_size) ;

  //read data and do ecc check
  if( data != AK_NULL )
  {
    T_S16 ret;
    
    ret = nf_read_page(chip,rowAddr,columnAddr,data,Nand_SysInfo.log_page_size + Nand_SysInfo.log_spare_size,AK_TRUE);

    if(ret==NF_SUCCESS && fs_info != AK_NULL)
    {
      // 读出文件系统信息

      HAL_READ_UINT32(FLASH_DMA_REG2, status);  // low 4Byte
      memcpy(fs_info,&status,4);
      //HAL_READ_UINT16(FLASH_DMA_REG3, status);  // high 2Byte
      HAL_READ_UINT32(FLASH_DMA_REG3, status);  // high 2Byte
      memcpy(fs_info+4,&status,2);
      return ECC_Check(data,(T_U8 *)fs_info,(T_U16)(status & 0xFFFF));
    }
        return ret;
  }

  //*****************************ONLY READ FS INFORMATION
  else//only read fs information
  {
    #ifdef STORE_ALL_INT
    store_all_int();//need or not?
    #endif

    //***************************push nandflash command,if need,make next code be a function*************************//
    {
      // execute FIFO to FLASH read sequence(because data is sequence, can only use NFLASH_READ1(0x00) command)
      T_U32 *reg_addr = (T_U32 *) FLASH_CTRL_REG0;

      // sta_clr = 0,
      HAL_WRITE_UINT32(FLASH_CTRL_REG22, 0x00);

      //nandflash read1 command
      HAL_WRITE_UINT32(reg_addr++, (NFLASH_READ1 << 11) | COMMAND_CYCLES_CONF);

      //nandflash byte offset in physic page
      HAL_WRITE_UINT32(reg_addr++, (((columnAddr + NFC_FS_INFO_OFFSET) & 0xff) << 11) | ADDRESS_CYCLES_CONF);
      HAL_WRITE_UINT32(reg_addr++, ((((columnAddr+ NFC_FS_INFO_OFFSET) & 0xff00)>>8) << 11) | ADDRESS_CYCLES_CONF);

      //nandflash physic page address
      HAL_WRITE_UINT32(reg_addr++, ((rowAddr & 0xff) << 11) | ADDRESS_CYCLES_CONF);
      HAL_WRITE_UINT32(reg_addr++, (((rowAddr & 0xff00)>>8) << 11) | ADDRESS_CYCLES_CONF);

      //*******if nand flash >= 256M, this address seek would send******//
      if(3==chipInfo.row_cycle)
      {
        HAL_WRITE_UINT32(reg_addr++, (((rowAddr & 0xff0000)>>16) << 11) | ADDRESS_CYCLES_CONF);
      }


      //nandflash read2 command,this is a wait command
      HAL_WRITE_UINT32(reg_addr++, (NFLASH_READ2 << 11) | COMMAND_CYCLES_CONF|(1 << 10));


      HAL_WRITE_UINT32(reg_addr++, WAIT_JUMP_CONF);// wait R/B rising edge
      //HAL_WRITE_UINT32(reg_addr++, (BASIC_DLYCNT << 11) | DELAY_CNT_CONF);

      //******************read data to status register ***********//
      HAL_WRITE_UINT32(reg_addr, ((NFC_FS_INFO_SIZE-1) << 11) | READ_INFO_CONF | LAST_CMD_FLAG);
      //HAL_WRITE_UINT32(reg_addr,  (7<<11) | READ_INFO_CONF | LAST_CMD_FLAG);

    }

    // excute operation, CE1, enable power saving, CE# keep LOW wait R/B
    //HAL_WRITE_UINT32(FLASH_CTRL_REG22, NCHIP_SELECT(rowAddr%NFLASH_PAGE_SIZE)|DEFAULT_GO|SAVE_MODE_FLAG);
    //HAL_WRITE_UINT32(FLASH_CTRL_REG22, NCHIP_SELECT(0)|DEFAULT_GO|SAVE_MODE_FLAG);
    HAL_WRITE_UINT32(FLASH_CTRL_REG22, NCHIP_SELECT(chip)|DEFAULT_GO);

    // wait reg22 fifo command send done
    while(!check_cmd_done());

    //从reg20中读出fs信息
    HAL_READ_UINT32(FLASH_CTRL_REG20, status);  // low 4Byte
    memcpy(fs_info,&status,4);
    HAL_READ_UINT32(FLASH_CTRL_REG21, status);  // high 2Byte
    memcpy(fs_info+4,&status,2);

    #ifdef STORE_ALL_INT
    restore_all_int(); //need or not??
    #endif//need or not??
    return NF_SUCCESS;
  }

}

/**
* @BRIEF read a block data
* @AUTHOR qxj
* @DATE 2006-7-17
* @PARAM 
  BlockNO: block number
  pData:   point to buffer to store data, 
           the buffer size is Nand_SysInfo.log_page_size * Nand_SysInfo.log_page_per_blk
* @RETURN
* @RETVAL
  return next valid block number, if return 0 indicate read this block fail
*/
static T_U16 nf_read_block(T_U32 BlockNO, T_U8 *pData)
{
    
    T_U32 i = 0, j = 0;
    T_U32 StartLogPageNO = 0;
    T_U8 spare[NFC_FS_INFO_SIZE];
  
  
    if(BlockNO >= Nand_SysInfo.total_blk_num || pData == AK_NULL)
        return 0;
  
    StartLogPageNO = BlockNO * Nand_SysInfo.log_page_per_blk;
    
  
    //printf("StartLogPageNO %d\n", StartLogPageNO);
    #ifdef BAD_BLOCK_TEST
    if(if_write_read_bad_block(BlockNO))
        return 0;
    #endif
    
    if( !nf_read_frame(StartLogPageNO , AK_NULL, spare) )
    {
        printf("read this block the first logpage 0x%x fail\n", StartLogPageNO);
        return 0;
    }
    
    if(spare[AVAILABLE_FLAG_OFFSET] != AVAILABLE_FLAG)
    {
        printf("this block the first page 0x%x, error available flag 0x%x\n", StartLogPageNO, spare[AVAILABLE_FLAG_OFFSET]);
        return 0;
    }
    
    if( (spare[BLOCK_INDEX_OFFSET] == 0xff)
	     &&(spare[BLOCK_INDEX_OFFSET + 1] == 0xff)
	     &&(spare[AVAILABLE_FLAG_OFFSET] == 0xff))//this block is a empty blk
    {
        printf("this is a empty block 0x%x, 0x%x 0x%x 0x%x\n", 
            StartLogPageNO + (i * Nand_SysInfo.Nand_LogPerPhy) + j, spare[BLOCK_INDEX_OFFSET],
            spare[BLOCK_INDEX_OFFSET + 1], spare[AVAILABLE_FLAG_OFFSET]);
        return 0;
    }
    
    
    for(i = 0; i < chipInfo.phy_page_per_blk; i++)
    {
        for(j = 0; j < Nand_SysInfo.Nand_LogPerPhy; j++)
        {
            //printf("read page %d\n", StartLogPageNO + (i * NFLASH_LOG_PER_PHY) + j);
      
            if( nf_read_frame(StartLogPageNO + (i * Nand_SysInfo.Nand_LogPerPhy) + j,
                              (T_U8 *)(pData + ((i * Nand_SysInfo.Nand_LogPerPhy) + j) * Nand_SysInfo.log_page_size),
                              spare) != AK_TRUE)
            {
                printf("read logpage %x fail\n", StartLogPageNO + (i * Nand_SysInfo.Nand_LogPerPhy) + j);
                return 0;
            }
        }
    }
    //printf("read block success\n");
  
    return *(T_S16 *)(spare + BLOCK_INDEX_OFFSET);
}

/**
* @BRIEF read data from flash in chain
in this chain,each item is a block.each block's the last spare area store a index which indicate
next valid block.
    CAUTION: must read all chain, because static value BlockIndex
* @AUTHOR qxj
* @DATE 2006-7-17
* @PARAM
  StartAddress : start address,this value will be change to next read block address
  EndAddress   : the chain last block address
  pData        : read data
  ReadLength   : read data length
  BackupMapAddress: backup chain store address

* @RETURN
* @RETVAL
  return AK_TRUE : success AK_FAIL: unsucess
*/
T_BOOL nf_force_read(T_U32 *StartAddress, T_U32 EndAddress, 
                     T_U8 *pData, T_U32 ReadLength, 
                     T_U32 BackupMapAddress)
{
    
    T_S32 readlen = (T_S32)ReadLength;
    T_U32 Offset = 0;
    T_U16 BackupBlockMap[NFC_LOG_PAGE_SIZE / 2];
    T_U32 MapBlockPage = 0, preMapBlockPage = 0;
    
    T_U32 StartBlockNumber;
    T_U32 EndBlockNumber;
    T_U32 CurrentBlockNumber;
    
    
    T_U32 StartLogicPageNumber = 0;
    T_U32 EndLogicPageNumber = 0;
    T_U8 chip;
    
    static T_U16 BlockIndex = 0;
    
    if(StartAddress == AK_NULL || pData == AK_NULL)
        return AK_FALSE;

    if(*StartAddress < (Nand_SysInfo.log_page_size * Nand_SysInfo.log_page_per_blk))//the first block
    {
        StartLogicPageNumber = *StartAddress / Nand_SysInfo.log_page_size;
        EndLogicPageNumber = EndAddress / Nand_SysInfo.log_page_size;
        
        printf("read from 0 block\n");
        printf("Start logic page 0x%x End logic page 0x%x data length 0x%x\n", 
                StartLogicPageNumber, EndLogicPageNumber, readlen);
        
        while((StartLogicPageNumber < EndLogicPageNumber) && readlen > 0)
    	{
    	    chip = (T_U8)(StartLogicPageNumber / Nand_SysInfo.chip_logpage_num);
            
            if(nf_read_page(chip, StartLogicPageNumber / Nand_SysInfo.Nand_LogPerPhy,
            (StartLogicPageNumber % Nand_SysInfo.Nand_LogPerPhy) * Nand_SysInfo.log_page_size,\
                pData,Nand_SysInfo.log_page_size, AK_FALSE) == AK_FALSE)
            {
                printf("read failed!\n");
                break;
            }
            //printf("successful!\n");
            pData += Nand_SysInfo.log_page_size;
            readlen -= Nand_SysInfo.log_page_size;
            StartLogicPageNumber++;
            *StartAddress += Nand_SysInfo.log_page_size;
    	}
    	
    	if(readlen <= 0)
            return AK_TRUE;
        else
        {
            printf("not all data read\n");
            return AK_FALSE;
        }
    }
    
    StartBlockNumber = (*StartAddress) / 
                       (Nand_SysInfo.log_page_size * Nand_SysInfo.log_page_per_blk);
                       
    EndBlockNumber = EndAddress / 
                     (Nand_SysInfo.log_page_size * Nand_SysInfo.log_page_per_blk);
    
    printf("StartBlockNumber 0x%x EndBlockNumber 0x%x readlen 0x%x\n", 
            StartBlockNumber, EndBlockNumber, readlen);
    
    for(CurrentBlockNumber = StartBlockNumber;
        CurrentBlockNumber <= EndBlockNumber && readlen > 0;)
    {
        //read ECC ok
        printf("read block 0x%x\n", CurrentBlockNumber);
        
        T_U32 tmp_block;
        if((tmp_block = nf_read_block(CurrentBlockNumber, pData)) == 0)
        {
            printf("read block fail\n");
            
            if(BackupMapAddress == 0)
            {
                printf("no backup data\n");
                //return AK_FALSE;
                CurrentBlockNumber++;
                continue;
            }
      
            //read the backup page
            MapBlockPage = BackupMapAddress / Nand_SysInfo.log_page_size;
            MapBlockPage += (BlockIndex / (Nand_SysInfo.log_page_size / 2));
            Offset = BlockIndex % (Nand_SysInfo.log_page_size / 2);
            
            printf("backup map page 0x%x offset 0x%x\n", MapBlockPage, Offset);

            if(MapBlockPage != preMapBlockPage)
            {
                preMapBlockPage = MapBlockPage;
        
                chip = (T_U8)(MapBlockPage / Nand_SysInfo.chip_logpage_num);
        
                if(nf_read_page(chip, MapBlockPage / Nand_SysInfo.Nand_LogPerPhy, 
                    (MapBlockPage % Nand_SysInfo.Nand_LogPerPhy) * Nand_SysInfo.log_page_size,
                    (T_U8 *)BackupBlockMap, Nand_SysInfo.log_page_size, AK_FALSE) == AK_FALSE)
                {
                    printf("read backup map false\n");
                    return AK_FALSE;
                }
                /*
                T_U32 i;
    
                for(i = 0; i < 512 / 2; i++)
                {
                  if(i != 0 && i % 8 == 0)
                    printf("\n");
                  
                  printf(" 0x%x ", BackupBlockMap[i]);
                }
                */
            }
      
            printf("read backup block 0x%x\n", BackupBlockMap[Offset]);
      
            if((tmp_block = nf_read_block((T_U32)(BackupBlockMap[Offset]),pData)) == 0)
            {
                printf("read backup data false\n");
                return AK_FALSE;
            }
        }
        CurrentBlockNumber = tmp_block;
        
        printf("success, next block 0x%x\n", CurrentBlockNumber);

        //Block is OK
  
        //printf("BlockNO %d\n", BlockNO);
  
        //to read the specified next Block        
        pData += (Nand_SysInfo.log_page_size * Nand_SysInfo.log_page_per_blk);
        readlen -= (Nand_SysInfo.log_page_size * Nand_SysInfo.log_page_per_blk);

        //the last block, all data be readed
        if(CurrentBlockNumber == LAST_BLOCK_FLAG)
        {
            printf("last block flag\n");
            readlen = 0;
            BlockIndex = 0;
            break;
        }
        
        printf("readlen 0x%x\n", readlen);
        BlockIndex++;
    }
  
    *StartAddress = CurrentBlockNumber * (Nand_SysInfo.log_page_size * Nand_SysInfo.log_page_per_blk);

    //force read ok
    if (readlen <= 0)
        return AK_TRUE;
    else 
        return AK_FALSE;
}


#endif//OS_ANYKA