k9s1208.c

USB_ON_s3c2410 USB_ON_s3c2410

		{
			Uart_Printf("Block Erase Error in %d\n",i);
		}
	}

	//program test
	for(i=0;i<512;i++)
	{
		buf[i]=i%256;
	}
	memset(&spare,0xff,16);

	page=23;
	retVal=k9_WriteChunkToNAND(&dev,page,buf,&spare);
	if(retVal!=YAFFS_OK)
	{
		Uart_Printf("Program Error in page %d\n",page);
	}

	retVal=k9_ReadChunkFromNAND(&dev,page,buf,&spare);
	if(retVal!=YAFFS_OK)
	{
		Uart_Printf("Read Error in page %d\n",page);
	}

	for(i=0;i<512;i++)
	{
		if(!(i%16))Uart_Printf("\n%3xh",i);
		Uart_Printf("%02X ",buf[i]);
	}
	Uart_Printf("\nSpare \n");
	for(i=0;i<16;i++)
	{
		Uart_Printf("%02X ",sp[i]);
	}
	Uart_Printf("\n");

	return 0;

}
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 int NF_EraseBlock(U32 block)
{
    U32 blockPage=(block<<5);
    int i;

#if BAD_CHECK
    if(NF_IsBadBlock(block))
	return 0;
#endif

    NF_nFCE_L();
    
    NF_CMD(0x60);   // Erase one block 1st command

    NF_ADDR(blockPage&0xff);	    // Page number=0
    NF_ADDR((blockPage>>8)&0xff);   
    NF_ADDR((blockPage>>16)&0xff);

    NF_CMD(0xd0);   // Erase one blcok 2nd command
    
   for(i=0;i<10;i++); //wait tWB(100ns)//??????

    NF_WAITRB();    // Wait tBERS max 3ms.
    NF_CMD(0x70);   // Read status command

    if (NF_RDDATA()&0x1) // Erase error
    {	
    	NF_nFCE_H();
	Uart_Printf("[ERASE_ERROR:block#=%d]\n",block);
	NF_MarkBadBlock(block);
	return 0;
    }
    else 
    {
    	NF_nFCE_H();
        return 1;
    }
}


static int NF_IsBadBlock(U32 block)
{
    int i;
    unsigned int blockPage;
    U8 data;
    
    
    blockPage=(block<<5);	// For 2'nd cycle I/O[7:5] 
    
    NF_nFCE_L();    
    NF_CMD(0x50);		// Spare array read command
    NF_ADDR(517&0xf);		// Read the mark of bad block in spare array(M addr=5) 
    NF_ADDR(blockPage&0xff);	// The mark of bad block is in 0 page
    NF_ADDR((blockPage>>8)&0xff);   // For block number A[24:17]
    NF_ADDR((blockPage>>16)&0xff);  // For block number A[25]

   for(i=0;i<10;i++);	// wait tWB(100ns) //?????
    
    NF_WAITRB();	// Wait tR(max 12us)
    
    data=NF_RDDATA();

    NF_nFCE_H();    

    if(data!=0xff)
    {
    	Uart_Printf("[block %d has been marked as a bad block(%x)]\n",block,data);
    	return 1;
    }
    else
    {
    	return 0;
    }
}


static int NF_MarkBadBlock(U32 block)
{
    int i;
    U32 blockPage=(block<<5);
 
    seBuf[0]=0xff;
    seBuf[1]=0xff;    
    seBuf[2]=0xff;    
    seBuf[5]=0x01;   // Bad blcok mark=0
    
    NF_nFCE_L(); 
    NF_CMD(0x50);   //????
    NF_CMD(0x80);   // Write 1st command
    
    NF_ADDR(0x0);		    // The mark of bad block is 
    NF_ADDR(blockPage&0xff);	    // marked 5th spare array 
    NF_ADDR((blockPage>>8)&0xff);   // in the 1st page.
    NF_ADDR((blockPage>>16)&0xff);  //
    
    for(i=0;i<16;i++)
    {
	NF_WRDATA(seBuf[i]);	// Write spare array
    }

    NF_CMD(0x10);   // Write 2nd command
    
    for(i=0;i<10;i++);  //tWB = 100ns. ///???????

    NF_WAITRB();      // Wait tPROG(200~500us)
  
    NF_CMD(0x70);
    
    for(i=0;i<3;i++);  //twhr=60ns////??????
    
    if (NF_RDDATA()&0x1) // Spare arrray write error
    {	
    	NF_nFCE_H();
    	Uart_Printf("[Program error is occurred but ignored]\n");
    }
    else 
    {
    	NF_nFCE_H();
    }

    Uart_Printf("[block #%d is marked as a bad block]\n",block);
    return 1;
}


int NF_ReadPage(U32 block,U32 page,U8 *buffer)
{
    int i;
    unsigned int blockPage;
    U8 ecc0,ecc1,ecc2;
    U8 *bufPt=buffer;
    U8 se[16];	   
    
    page=page&0x1f;
    blockPage=(block<<5)+page;
    NF_RSTECC();    // Initialize ECC
    
    NF_nFCE_L();    
    NF_CMD(0x00);   // Read command
    NF_ADDR(0);	    // Column = 0
    NF_ADDR(blockPage&0xff);	    //
    NF_ADDR((blockPage>>8)&0xff);   // Block & Page num.
    NF_ADDR((blockPage>>16)&0xff);  //

    for(i=0;i<10;i++); //wait tWB(100ns)/////??????
    
    NF_WAITRB();    // Wait tR(max 12us)
    for(i=0;i<512;i++)
    {
    	*bufPt++=NF_RDDATA();	// Read one page
    }
    ecc0=rNFECC0;
    ecc1=rNFECC1;
    ecc2=rNFECC2;
    for(i=0;i<16;i++)
    {
    	se[i]=NF_RDDATA();	// Read spare array
    }
    
    //__RdPage528(pPage);
    NF_nFCE_H();    

    if(ecc0==se[0] && ecc1==se[1] && ecc2==se[2])
    {
	Uart_Printf("[ECC OK:%x,%x,%x]\n",se[0],se[1],se[2]);
    	return 1;
    }
    else
    {
	Uart_Printf("[ECC ERROR(RD):read:%x,%x,%x, reg:%x,%x,%x]\n",
		se[0],se[1],se[2],ecc0,ecc1,ecc2);
    	return 0;
    }    	
}


int NF_WritePage(U32 block,U32 page,U8 *buffer)
{
    int i;
    U32 blockPage=(block<<5)+page;
    U8 *bufPt=buffer;

    NF_RSTECC();    // Initialize ECC
    
    NF_nFCE_L(); 
    NF_CMD(0x0);//??????
    NF_CMD(0x80);   // Write 1st command
    NF_ADDR(0);			    // Column 0
    NF_ADDR(blockPage&0xff);	    //
    NF_ADDR((blockPage>>8)&0xff);   // Block & page num.
    NF_ADDR((blockPage>>16)&0xff);  //

    for(i=0;i<512;i++)
    {
	NF_WRDATA(*bufPt++);	// Write one page to NFM from buffer
    }  
    
    seBuf[0]=rNFECC0;
    seBuf[1]=rNFECC1;
    seBuf[2]=rNFECC2;
    seBuf[5]=0xff;		// Marking good block
    
    for(i=0;i<16;i++)
    {
	NF_WRDATA(seBuf[i]);	// Write spare array(ECC and Mark)
    }  

    NF_CMD(0x10);   // Write 2nd command
    
    for(i=0;i<10;i++);  //tWB = 100ns. ////??????

    NF_WAITRB();    //wait tPROG 200~500us;
 
    NF_CMD(0x70);   // Read status command   
    
    for(i=0;i<3;i++);  //twhr=60ns
    
    if (NF_RDDATA()&0x1) // Page write error
    {	
    	NF_nFCE_H();
	Uart_Printf("[PROGRAM_ERROR:block#=%d]\n",block);
	NF_MarkBadBlock(block);
	return 0;
    }
    else 
    {
    	NF_nFCE_H();
    #if (WRITEVERIFY==1)
	//return NF_VerifyPage(block,page,pPage);	
    #else
	return 1;
    #endif
    }
}



static U16 NF_CheckId(void)
{
    int i;
    U16 id;
    
    NF_nFCE_L();
    
    NF_CMD(0x90);
    NF_ADDR(0x0);
    
    for(i=0;i<10;i++); //wait tWB(100ns)////?????
    
    id=NF_RDDATA()<<8;	// Maker code(K9S1208V:0xec)
    id|=NF_RDDATA();	// Devide code(K9S1208V:0x76)
    
    NF_nFCE_H();
    
    return id;
}


static void NF_Reset(void)
{
    int i;
    U16 id;
    
    
    NF_nFCE_L();

    NF_CMD(0xFF);	//reset command

    for(i=0;i<10;i++);  //tWB = 100ns. //??????

    NF_WAITRB();      //wait 200~500us;
     
    NF_nFCE_H();
}


void NF_Init(void)
{
    //rNFCONF=(1<<15)|(1<<14)|(1<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0);	
    // 1  1    1     1,   1      xxx,  r xxx,   r xxx        
    // En 512B 4step ECCR nFCE=H tACLS   tWRPH0   tWRPH1
    
	rNFCONF=(1<<15)|(1<<14)|(1<<13)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0);	
	// without ECC

    NF_Reset();
}

char Check10(int data, char seq) // Check '10' pattern
{
    if(data & (0x2<< seq*2) )
	return 1;
    else
	return 0;
}