static int NAND_ReadPage(unsigned long block,unsigned long page,unsigned char *buffer) //?Flash
{
int i;
unsigned int blockPage;
unsigned volatile short *NFCONF;
unsigned volatile short *NFCMD;
unsigned volatile short *NFSTAT;
unsigned volatile short *NFADDR;
unsigned volatile short *NFDATA;
NFCONF=(unsigned short *)0x4e000000;
NFCMD=(unsigned short *)0x4e000004;
NFSTAT=(unsigned short *)0x4e000010;
NFDATA=(unsigned short *)0x4e00000C;
NFADDR=(unsigned short *)0x4e000008;
page=page&0x1f;
blockPage=(block<<5)+page; //1Bolck¥]§t32page
//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++)
{
*buffer++=NF_RDDATA(); // Read one page
}
NF_nFCE_H();
}
static int NF_ReadPage(U32 block,U32 page,U8 *buffer,U8 *spareBuf)
{
int i;
unsigned int blockPage;
U8 *bufPt=buffer;
page=page&0x1f;
blockPage=(block<<5)+page;
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); //
Delay(1); //wait tWB(100ns)/////??????
NF_WAITRB(); // Wait tR(max 12us)
for(i=0;i<(512);i++)
{
*bufPt++=NF_RDDATA(); // Read one page
}
if(spareBuf!=NULL)
{
for(i=0;i<16;i++)
spareBuf[i]=NF_RDDATA(); // Read spare array
}
NF_nFCE_H();
return 1;
}
static int NF_IsBadBlock(U32 block)
{
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]
Delay(1); // wait tWB(100ns)
NF_WAITRB(); // Wait tR(max 12us)
data=NF_RDDATA();
NF_nFCE_H();
if(data!=0xff)
{
printf("[block %d:bad block(%x)]\n",block,data);
return 1;
}
else
{
printf(".");
return 0;
}
}
static int NAND_WritePage(unsigned long block,unsigned long page,unsigned char *buffer) //?Flash
{
int i;
unsigned long blockPage=(block<<5)+page;
//NF_RSTECC(); // Initialize ECC
unsigned volatile short *NFCONF;
unsigned volatile short *NFCMD;
unsigned volatile short *NFSTAT;
unsigned volatile short *NFADDR;
unsigned volatile short *NFDATA;
NFCONF=(unsigned short *)0x4e000000;
NFCMD=(unsigned short *)0x4e000004;
NFSTAT=(unsigned short *)0x4e000010;
NFDATA=(unsigned short *)0x4e00000C;
NFADDR=(unsigned short *)0x4e000008;
NF_nFCE_L();
NF_CMD(0x0); //?????\\Read Mode 1
NF_CMD(0x80); // Write 1st command,?Õu?¤J
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(*buffer++); // Write one page to NFM from buffer
}
#if 0
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)
#endif
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)
{
NF_nFCE_H();
return 0;
}//error }
else
{
NF_nFCE_H();
return 1;
}
}
static int NF_WritePage(U32 block,U32 page,U8 *buffer,U8 *spareBuf)
{
int i;
U32 blockPage=(block<<5)+page;
U8 *bufPt=buffer;
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
}
if(spareBuf!=NULL)
{
for(i=0;i<16;i++)
{
NF_WRDATA(spareBuf[i]); // Write spare array(ECC and Mark)
}
}
NF_CMD(0x10); // Write 2nd command
Delay(1); //tWB = 100ns.
NF_WAITRB(); //wait tPROG 200~500us;
NF_CMD(0x70); // Read status command
Delay(1); //twhr=60ns
if (NF_RDDATA()&0x1) // Page write error
{
NF_nFCE_H();
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 void NF_Reset(void)
{
NF_nFCE_L();
NF_CMD(0xFF); //reset command
Delay(1); //tWB = 100ns.
NF_WAITRB(); //wait 200~500us;
NF_nFCE_H();
}
static int NF_MarkBadBlock(U32 block)
{
int i;
U32 blockPage=(block<<5);
seBuf[0]=0xff;
seBuf[1]=0xff;
seBuf[2]=0xff;
seBuf[5]=0x44; // 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
Delay(1); //tWB = 100ns.
NF_WAITRB(); // Wait tPROG(200~500us)
NF_CMD(0x70);
Delay(1); //twhr=60ns//
if (NF_RDDATA()&0x1) // Spare arrray write error
{
NF_nFCE_H();
printf("[Program error is occurred but ignored]\n");
}
else
{
NF_nFCE_H();
}
printf("[block #%d is marked as a bad block]\n",block);
return 1;
}
void enable_nand() {
unsigned volatile short *NFCONF;
unsigned volatile short *NFCMD;
unsigned volatile short *NFSTAT;
unsigned int i;
NFCONF=(unsigned short *)0x4e000000;
NFCMD=(unsigned short *)0x4e000004;
NFSTAT=(unsigned short *)0x4e000010;
//*NFCONF=(1<<15|1<<14|1<<13|1<<12|TACLS<<8|TWRPH0<<4|TWRPH1); /*Setup NFCONF */
*NFCONF=0xf842;
NF_nFCE_L(); /*enable nand chip */
*NFCMD=(unsigned char )RESET;
NF_WAITRB();
NF_nFCE_H(); /*disable nand chip */
}
static int NF_EraseBlock(U32 block)
{
U32 blockPage=(block<<5);
#if BAD_CHECK
if(NF_IsBadBlock(block) && block!=0) //block #0 can't be bad block for NAND boot
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
Delay(1); //wait tWB(100ns)
NF_WAITRB(); // Wait tBERS max 3ms.
NF_CMD(0x70); // Read status command
if (NF_RDDATA()&0x1) // Erase error
{
NF_nFCE_H();
printf("[ERASE_ERROR:block#=%d]\n",block);
NF_MarkBadBlock(block);
return 0;
}
else
{
NF_nFCE_H();
return 1;
}
}
