Nandflash 驱动移植 （六）
Nandflash驱动移植系列文章导航：
Nandflash 驱动移植 （一）
Nandflash 驱动移植 （二）
Nandflash 驱动移植 （三）
Nandflash 驱动移植 （四）
Nandflash 驱动移植 （五）
Nandflash 驱动移植 （六）
一共六篇
近段时间比较忙，接着上一篇，这篇主要介绍到写的部分
1、FMD_LB_WriteSector() MLC写sector
BOOL FMD_LB_WriteSector(SECTOR_ADDR startSectorAddr, LPBYTE pSectorBuff, PSectorInfo pSectorInfoBuff, DWORD dwNumSectors)
{
DWORD i;
BOOL bRet = TRUE;
volatile DWORD wrdata;
DWORD MECCBuf[16]; // 16 gjl
UINT16 nSectorLoop;
int NewSpareAddr = 4096; // 2048 gjl
int NewDataAddr = 0;
int NewSectorAddr = startSectorAddr;
#if CHECK_SPAREECC
DWORD SECCBuf[4]; // 2 gjl
#endif
#if (NAND_DEBUG)
RETAILMSG(1, (TEXT("FMD::FMD_LB_WriteSector 0x%x \n"), startSectorAddr));
#endif
if (!pSectorBuff && !pSectorInfoBuff)
return(FALSE);
if ( dwNumSectors > 1 )
{
RETAILMSG(1, (TEXT("######## FATAL ERROR => FMD::FMD_WriteSector->dwNumsectors is bigger than 1. \n")));
return FALSE;
}
if (!pSectorBuff)
{
NAND_LB_WriteSectorInfo(startSectorAddr, pSectorInfoBuff);
return TRUE;
}
// Enable Chip
NF_nFCE_L();
NF_CLEAR_RB();
// Issue command
NF_CMD(CMD_WRITE);
// Setup address
NF_ADDR((NewDataAddr)&0xff);
NF_ADDR((NewDataAddr>>8)&0xff);
NF_ADDR((NewSectorAddr)&0xff);
NF_ADDR((NewSectorAddr>>8)&0xff);
#if LB_NEED_EXT_ADDR
NF_ADDR((NewSectorAddr>>16)&0xff);
#endif
for (nSectorLoop = 0; nSectorLoop < SECTORS_PER_PAGE; nSectorLoop++)
{
// Initialize ECC register
NF_MSGLENGTH_512();
NF_ECCTYPE_4BIT();
NF_RSTECC();
NF_MECC_UnLock();
// Special case to handle un-aligned buffer pointer.
//
if( ((DWORD) (pSectorBuff+nSectorLoop*SECTOR_SIZE)) & 0x3)
{
// Write the data
for(i=0; i<SECTOR_SIZE/sizeof(DWORD); i++)
{
wrdata = (pSectorBuff+nSectorLoop*SECTOR_SIZE)[i*4+0];
wrdata |= (pSectorBuff+nSectorLoop*SECTOR_SIZE)[i*4+1]<<8;
wrdata |= (pSectorBuff+nSectorLoop*SECTOR_SIZE)[i*4+2]<<16;
wrdata |= (pSectorBuff+nSectorLoop*SECTOR_SIZE)[i*4+3]<<24;
NF_WRDATA_WORD(wrdata);
}
}
else
{
WrPage512(pSectorBuff+nSectorLoop*SECTOR_SIZE);
}
// Read out the ECC value generated by HW
NF_MECC_Lock();
//encode done
while (!(NF_RDSTAT & (1<<7)));
MECCBuf[2*nSectorLoop] = NF_RDMECC0();
MECCBuf[2*nSectorLoop+1] = NF_RDMECC1();
#if DEBUG_WRITE_READ_EQUAL
g_MECCBuf[2*nSectorLoop] = MECCBuf[2*nSectorLoop];
g_MECCBuf[2*nSectorLoop+1] = MECCBuf[2*nSectorLoop+1];
#endif
}
NF_CMD(CMD_RDI);
NF_ADDR((NewSpareAddr)&0xff);
NF_ADDR((NewSpareAddr>>8)&0xff);
// Write the SectorInfo data to the media
// NOTE: This hardware is odd: only a byte can be written at a time and it must reside in the
// upper byte of a USHORT.
if(pSectorInfoBuff)
{
// Write the first reserved field (DWORD)
NF_WRDATA_BYTE(pSectorInfoBuff->bBadBlock);
NF_WRDATA_WORD(pSectorInfoBuff->dwReserved1);
NF_WRDATA_BYTE(pSectorInfoBuff->bOEMReserved);
NF_WRDATA_BYTE(pSectorInfoBuff->wReserved2&0xff);
NF_WRDATA_BYTE((pSectorInfoBuff->wReserved2>>8)&0xff);
}
else
{
// Make sure we advance the Flash's write pointer (even though we aren't writing the SectorInfo data)
for(i=0; i<sizeof(SectorInfo)/sizeof(DWORD); i++)
{
NF_WRDATA_WORD(0xffffffff);
}
}
// Write the ECC value to the flash
for (nSectorLoop = 0; nSectorLoop < SECTORS_PER_PAGE*2; nSectorLoop++)
NF_WRDATA_WORD(MECCBuf[nSectorLoop]);
// Finish up the write operation
NF_CMD(CMD_WRITE2);
// Wait for RB
NF_DETECT_RB(); // Wait tR(max 12us)
if ( NF_RDSTAT & STATUS_ILLACC )
{
RETAILMSG(1, (TEXT("FMD_WriteSector() ######## Error Programming page (Illigar Access) %d!\n"), startSectorAddr));
g_pNFConReg->NFSTAT = STATUS_ILLACC; // Write 1 to clear.
bRet = FALSE;
}
else
{
// Check the status
NF_CMD(CMD_STATUS);
if(NF_RDDATA_BYTE() & STATUS_ERROR)
{
RETAILMSG(1, (TEXT("FMD_WriteSector() ######## Error Programming page %d!\n"), startSectorAddr));
bRet = FALSE;
}
}
// Disable the chip
NF_nFCE_H();
return bRet;
}
这个是飞凌的源码，这里需要修改成8bit的ECC。
变量定义这里需要把 DWORD MECCBuf[16]; 修改成：
DWORD MECCBuf[32];
在
if (!pSectorBuff)
{
NAND_LB_WriteSectorInfo(startSectorAddr, pSectorInfoBuff);
return TRUE;
}
操作之前，添加使能中断的操作：
g_pNFConReg->NFCONT |= (1<<10); // Enable illegal access interrupt control g_pNFConReg->NFCONT |= (1<<9); // Enable RnB interrupt
for (nSectorLoop = 0; nSectorLoop < SECTORS_PER_PAGE; nSectorLoop++)这里是循环写一个block的页数据。
把
NF_MSGLENGTH_512();
NF_ECCTYPE_4BIT();
中的 NF_ECCTYPE_4BIT(); 修改成：
NF_ECCTYPE_8BIT(); NF_ECC_8BIT_STOP(); NF_ECC_DIRECTION_OUT();
在
//encode done
while (!(NF_RDSTAT & (1<<7)));
处理的后面，把
MECCBuf[2*nSectorLoop] = NF_RDMECC0();
MECCBuf[2*nSectorLoop+1] = NF_RDMECC1();
修改成：
MECCBuf[4*nSectorLoop] = NF_RDM8ECC0(); MECCBuf[4*nSectorLoop+1] = NF_RDM8ECC1(); MECCBuf[4*nSectorLoop+2] = NF_RDM8ECC2(); MECCBuf[4*nSectorLoop+3] = NF_RDM8ECC3() & 0xff;
在for (nSectorLoop = 0; nSectorLoop < SECTORS_PER_PAGE; nSectorLoop++)循环结束的后面，
NF_CMD(CMD_RDI);
NF_ADDR((NewSpareAddr)&0xff);
NF_ADDR((NewSpareAddr>>8)&0xff);
操作之前，添加：
NF_ECCTYPE_8BIT(); NF_ECC_8BIT_STOP();
看到写入ECC数据部分：
// Write the ECC value to the flash
for (nSectorLoop = 0; nSectorLoop < SECTORS_PER_PAGE*2; nSectorLoop++)
NF_WRDATA_WORD(MECCBuf[nSectorLoop]);
这里需要把for修改成：
for (nSectorLoop = 0; nSectorLoop < SECTORS_PER_PAGE*4; nSectorLoop++)
在片选操作
// Disable the chip
NF_nFCE_H();
之前添加：
g_pNFConReg->NFCONT &= ~(1<<10); // Disable illegal access interrupt control g_pNFConReg->NFCONT &= ~(1<<9); // Disable RnB interrupt
到此，写入部分修改完毕
2、NAND_LB_WriteSectorInfo() 写sector信息
BOOL NAND_LB_WriteSectorInfo(SECTOR_ADDR sectorAddr, PSectorInfo pInfo)
{
BOOL bRet = TRUE;
int NewSpareAddr = 4096; // gjl 2048
int NewSectorAddr = sectorAddr;
#if CHECK_SPAREECC
DWORD SECCBuf[4]; // gjl 2
#endif
// Chip enable
NF_nFCE_L();
NF_CLEAR_RB();
// Write the command
// First, let's point to the spare area
NF_CMD(CMD_WRITE);
// Write the address
NF_ADDR((NewSpareAddr)&0xff);
NF_ADDR((NewSpareAddr>>8)&0xff);
NF_ADDR((NewSectorAddr)&0xff);
NF_ADDR((NewSectorAddr>>8)&0xff);
#if LB_NEED_EXT_ADDR
NF_ADDR((NewSectorAddr>>16)&0xff);
#endif
NF_MSGLENGTH_512();
NF_ECCTYPE_4BIT();
// Now let's write the SectorInfo data
//
// Write the first reserved field (DWORD)
NF_WRDATA_BYTE(pInfo->bBadBlock);
NF_WRDATA_WORD(pInfo->dwReserved1);
NF_WRDATA_BYTE(pInfo->bOEMReserved);
NF_WRDATA_BYTE(pInfo->wReserved2&0xff);
NF_WRDATA_BYTE((pInfo->wReserved2>>8)&0xff);
NF_WRDATA_WORD(0xffffffff); // Mecc[0]
NF_WRDATA_WORD(0xffffffff); // Mecc[1]
NF_WRDATA_WORD(0xffffffff); // Mecc[2]
NF_WRDATA_WORD(0xffffffff); // Mecc[3]
NF_WRDATA_WORD(0xffffffff); // Mecc[4]
NF_WRDATA_WORD(0xffffffff); // Mecc[5]
NF_WRDATA_WORD(0xffffffff); // Mecc[6]
NF_WRDATA_WORD(0xffffffff); // Mecc[7]
// Issue the write complete command
NF_CMD(CMD_WRITE2);
// Check ready bit
NF_DETECT_RB(); // Wait tR(max 12us)
if ( NF_RDSTAT & STATUS_ILLACC )
{
RETAILMSG(1, (TEXT("NAND_LB_WriteSectorInfo() ######## Error Programming page (Illigar Access) %d!\n"), sectorAddr));
g_pNFConReg->NFSTAT = STATUS_ILLACC; // Write 1 to clear.
bRet = FALSE;
}
else
{
// Check the status of program
NF_CMD(CMD_STATUS);
if( NF_RDDATA_BYTE() & STATUS_ERROR) {
RETAILMSG(1, (TEXT("NAND_LB_WriteSectorInfo() ######## Error Programming page %d!\n"), sectorAddr));
bRet = FALSE;
}
}
NF_nFCE_H();
return bRet;
}
这个是飞凌给的源码，从上面可以看出也是只用到了4bit的ECC。下面我们将其改成8bit的ECC：
看到
NF_MSGLENGTH_512();
NF_ECCTYPE_4BIT();
这两个处理，我们把其中的 NF_ECCTYPE_4BIT(); 修改成
NF_ECCTYPE_8BIT(); // use 8bit ECC type NF_ECC_8BIT_STOP(); // init 8bit ECC decoding
然后，就开始写入sector的信息数据了，这里主要看写入主ECC数据部分，原文的是
NF_WRDATA_WORD(0xffffffff); // Mecc[0]
NF_WRDATA_WORD(0xffffffff); // Mecc[1]
NF_WRDATA_WORD(0xffffffff); // Mecc[2]
NF_WRDATA_WORD(0xffffffff); // Mecc[3]
NF_WRDATA_WORD(0xffffffff); // Mecc[4]
NF_WRDATA_WORD(0xffffffff); // Mecc[5]
NF_WRDATA_WORD(0xffffffff); // Mecc[6]
NF_WRDATA_WORD(0xffffffff); // Mecc[7]
这里需要修改成：
// 16 byte Sector0 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[0]
NF_WRDATA_WORD(0xffffffff); // Mecc[1]
NF_WRDATA_WORD(0xffffffff); // Mecc[2]
NF_WRDATA_WORD(0xffffffff); // Mecc[3]
// 16 byte Sector1 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[4]
NF_WRDATA_WORD(0xffffffff); // Mecc[5]
NF_WRDATA_WORD(0xffffffff); // Mecc[6]
NF_WRDATA_WORD(0xffffffff); // Mecc[7]
// 16 byte Sector2 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[8]
NF_WRDATA_WORD(0xffffffff); // Mecc[9]
NF_WRDATA_WORD(0xffffffff); // Mecc[10]
NF_WRDATA_WORD(0xffffffff); // Mecc[11]
// 16 byte Sector3 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[12]
NF_WRDATA_WORD(0xffffffff); // Mecc[13]
NF_WRDATA_WORD(0xffffffff); // Mecc[14]
NF_WRDATA_WORD(0xffffffff); // Mecc[15]
// 16 byte Sector4 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[16]
NF_WRDATA_WORD(0xffffffff); // Mecc[17]
NF_WRDATA_WORD(0xffffffff); // Mecc[18]
NF_WRDATA_WORD(0xffffffff); // Mecc[19]
// 16 byte Sector5 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[20]
NF_WRDATA_WORD(0xffffffff); // Mecc[21]
NF_WRDATA_WORD(0xffffffff); // Mecc[22]
NF_WRDATA_WORD(0xffffffff); // Mecc[23]
// 16 byte Sector6 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[24]
NF_WRDATA_WORD(0xffffffff); // Mecc[25]
NF_WRDATA_WORD(0xffffffff); // Mecc[26]
NF_WRDATA_WORD(0xffffffff); // Mecc[27]
// 16 byte Sector7 ECC data
NF_WRDATA_WORD(0xffffffff); // Mecc[28]
NF_WRDATA_WORD(0xffffffff); // Mecc[29]
NF_WRDATA_WORD(0xffffffff); // Mecc[30]
NF_WRDATA_WORD(0xffffffff); // Mecc[31]
该函数中剩余的部分就不需要修改了。
这里之所以这样修改，是因为每512字节的主数据就产生4*4字节的ECC，而我们这里每个block有4096字节，即8个512字节，也就是8 * 16个字节的ECC数据。
3、FMD_SB_WriteSector()
BOOL FMD_SB_WriteSector(SECTOR_ADDR startSectorAddr, LPBYTE pSectorBuff, PSectorInfo pSectorInfoBuff, DWORD dwNumSectors)
{
BYTE Status;
ULONG SectorAddr = (ULONG)startSectorAddr;
ULONG MECC;
if (!pSectorBuff && !pSectorInfoBuff)
return(FALSE);
#if (NAND_DEBUG)
RETAILMSG(1,(TEXT("#### FMD_DRIVER:::FMD_sbwrite \n")));
#endif
NF_nFCE_L(); // Select the flash chip.
while (dwNumSectors--)
{
if (!pSectorBuff) // Only spare area
{
// If we are asked just to write the SectorInfo, we will do that separately
NF_CMD(CMD_READ2); // Send read command.
NF_CMD(CMD_WRITE); // Send write command.
NF_ADDR(0); // Column = 0.
NF_ADDR(SectorAddr & 0xff); // Page address.
NF_ADDR((SectorAddr >> 8) & 0xff);
#if SB_NEED_EXT_ADDR
NF_ADDR((SectorAddr >> 16) & 0xff);
#endif
// Write the SectorInfo data to the media.
// Spare area[7:0]
WrPageInfo((PBYTE)pSectorInfoBuff);
NF_CLEAR_RB();
NF_CMD(CMD_WRITE2); // Send write confirm command.
NF_DETECT_RB();
NF_CMD(CMD_STATUS);
Status = NF_RDDATA_BYTE(); // Read command status.
if (Status & STATUS_ERROR)
{
NF_nFCE_H(); // Deselect the flash chip.
//SetKMode (bLastMode);
return(FALSE);
}
pSectorInfoBuff++;
}
else // Main area+Spare area.
{
NF_CMD(CMD_READ); // Send read command.
NF_CMD(CMD_WRITE); // Send write command.
NF_ADDR(0); // Column = 0.
NF_ADDR(SectorAddr & 0xff); // Page address.
NF_ADDR((SectorAddr >> 8) & 0xff);
#if SB_NEED_EXT_ADDR
NF_ADDR((SectorAddr >> 16) & 0xff);
#endif
// Special case to handle un-aligned buffer pointer.
NF_RSTECC();
NF_MECC_UnLock();
if( ((DWORD) pSectorBuff) & 0x3)
{
WrPage512Unalign (pSectorBuff);
}
else
{
WrPage512(pSectorBuff); // Write page/sector data.
}
NF_MECC_Lock();
// Write the SectorInfo data to the media.
// Spare area[7:0]
if(pSectorInfoBuff)
{
WrPageInfo((PBYTE)pSectorInfoBuff);
pSectorInfoBuff++;
}
else // Make sure we advance the Flash's write pointer (even though we aren't writing the SectorInfo data)
{
BYTE TempInfo[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
WrPageInfo(TempInfo);
}
// Write the SectorInfo data to the media.
// Spare area[11:8]
// Get the ECC data from status register.
MECC = NF_RDMECC0();
// Now, Write the ECC data to Spare area[11:8]
NF_WRDATA_BYTE((UCHAR)((MECC ) & 0xff)); // Spare area offset 8
NF_WRDATA_BYTE((UCHAR)((MECC >> 8) & 0xff)); // Spare area offset 9
NF_WRDATA_BYTE((UCHAR)((MECC >> 16) & 0xff)); // Spare area offset 10
NF_WRDATA_BYTE((UCHAR)((MECC >> 24) & 0xff)); // Spare area offset 11
NF_CLEAR_RB();
NF_CMD(CMD_WRITE2); // Send write confirm command.
NF_DETECT_RB();
do
{
NF_CMD(CMD_STATUS);
Status = NF_RDDATA_BYTE(); // Read command status.
}while(!(Status & STATUS_READY));
if (Status & STATUS_ERROR)
{
NF_nFCE_H(); // Deselect the flash chip.
return(FALSE);
}
pSectorBuff += NAND_SECTOR_SIZE;
}
++SectorAddr;
}
NF_nFCE_H(); // Deselect the flash chip.
return(TRUE);
}
这部分就不需要修改了，上面的代码是处理SLC部分的
4、FMD_LB_EraseBlock() 擦出块
BOOL FMD_LB_EraseBlock(BLOCK_ID blockID)
{
BOOL bRet = TRUE;
DWORD dwPageID = blockID << LB_NAND_LOG_2_PAGES_PER_BLOCK;
#if (NAND_DEBUG)
RETAILMSG(1, (TEXT("FMD_LB_EraseBlock 0x%x \n"), blockID));
#endif
// Enable the chip
NF_nFCE_L(); // Select the flash chip.
NF_CLEAR_RB();
NF_MSGLENGTH_512();
// Issue command
NF_CMD(CMD_ERASE);
// Set up address
NF_ADDR((dwPageID) & 0xff);
NF_ADDR((dwPageID >> 8) & 0xff);
#if LB_NEED_EXT_ADDR
NF_ADDR((dwPageID >> 16) & 0xff);
#endif
// Complete erase operation
NF_CMD(CMD_ERASE2);
// Wait for ready bit
NF_DETECT_RB(); // Wait tR(max 12us)
if ( NF_RDSTAT & STATUS_ILLACC )
{
RETAILMSG(1, (TEXT("LB######## Error Erasing block (Illigar Access) %d!\n"), blockID));
g_pNFConReg->NFSTAT = STATUS_ILLACC; // Write 1 to clear.
bRet = FALSE;
}
else
{
// Check the status
NF_CMD(CMD_STATUS);
if( NF_RDDATA_BYTE() & STATUS_ERROR)
{
RETAILMSG(1, (TEXT("LB######## Error Erasing block %d!\n"), blockID));
bRet = FALSE;
}
}
NF_nFCE_H(); // Select the flash chip.
return bRet;
}
上述是飞凌的源码，这里我们需要稍作修改。
在使能片选 NF_nFCE_L(); 之前，我们需要使能一些中断：
g_pNFConReg->NFCONT |= (1<<10); // Enable illegal access interrupt control g_pNFConReg->NFCONT |= (1<<9); // Enable RnB interrupt
擦除操作处理完之后，在 NF_nFCE_H(); 之前，需要关闭前面使能的中断：
g_pNFConReg->NFCONT &= ~(1<<10); // Disable illegal access interrupt control g_pNFConReg->NFCONT &= ~(1<<9); // Disable RnB interrupt
5、FMD_SB_EraseBlock()
BOOL FMD_SB_EraseBlock(BLOCK_ID blockID)
{
BOOL bRet = TRUE;
DWORD dwPageID = blockID << SB_NAND_LOG_2_PAGES_PER_BLOCK;
// Enable the chip
NF_nFCE_L(); // Select the flash chip.
// Issue command
NF_CMD(CMD_ERASE);
// Set up address
NF_ADDR((dwPageID) & 0xff);
NF_ADDR((dwPageID >> 8) & 0xff);
#if SB_NEED_EXT_ADDR
NF_ADDR((dwPageID >> 16) & 0xff);
#endif
NF_CLEAR_RB();
// Complete erase operation
NF_CMD(CMD_ERASE2);
// Wait for ready bit
NF_DETECT_RB(); // Wait tR(max 12us)
if ( NF_RDSTAT & STATUS_ILLACC )
{
RETAILMSG(1, (TEXT("SB######## Error Erasing block (Illigar Access) %d!\n"), blockID));
g_pNFConReg->NFSTAT = STATUS_ILLACC; // Write 1 to clear.
bRet = FALSE;
}
else
{
// Check the status
NF_CMD(CMD_STATUS);
if( NF_RDDATA_BYTE() & STATUS_ERROR)
{
RETAILMSG(1, (TEXT("SB######## Error Erasing block %d!\n"), blockID));
bRet = FALSE;
}
}
NF_nFCE_H(); // Select the flash chip.
return bRet;
}
SLC擦除块操作，这里不需要修改
6、FMD_LB_GetBlockStatus() MLC获取块的状态
DWORD FMD_LB_GetBlockStatus(BLOCK_ID blockID)
{
BLOCK_ID blockID_bad = blockID + 1;
SECTOR_ADDR sectorAddr = (blockID_bad << LB_NAND_LOG_2_PAGES_PER_BLOCK) - 1;
SectorInfo SI;
DWORD dwResult = 0;
//RETAILMSG(1, (TEXT("FMD_LB_GetBlockStatus (0x%x)0x%x \n"), blockID, sectorAddr));
if(!FMD_LB_ReadSector(sectorAddr, NULL, &SI, 1))
{
return BLOCK_STATUS_UNKNOWN;
}
if(!(SI.bOEMReserved & OEM_BLOCK_READONLY))
{
dwResult |= BLOCK_STATUS_READONLY;
}
if (!(SI.bOEMReserved & OEM_BLOCK_RESERVED))
{
dwResult |= BLOCK_STATUS_RESERVED;
}
if(SI.bBadBlock != 0xFF)
{
dwResult |= BLOCK_STATUS_BAD;
}
return dwResult;
}
7、FMD_SB_GetBlockStatus() SLC读取块状态
DWORD FMD_SB_GetBlockStatus(BLOCK_ID blockID)
{
SECTOR_ADDR sectorAddr = blockID << SB_NAND_LOG_2_PAGES_PER_BLOCK;
SectorInfo SI;
DWORD dwResult = 0;
//RETAILMSG(1, (TEXT("FMD_SB_GetBlockStatus (0x%x)0x%x \n"), blockID, sectorAddr));
if(!FMD_SB_ReadSector(sectorAddr, NULL, &SI, 1))
{
return BLOCK_STATUS_UNKNOWN;
}
if(!(SI.bOEMReserved & OEM_BLOCK_READONLY))
{
dwResult |= BLOCK_STATUS_READONLY;
}
if(SI.bBadBlock != 0xFF)
{
dwResult |= BLOCK_STATUS_BAD;
}
return dwResult;
}
8、FMD_LB_SetBlockStatus()、FMD_SB_SetBlockStatus() 设置块的状态
BOOL FMD_LB_SetBlockStatus(BLOCK_ID blockID, DWORD dwStatus)
{
BYTE bStatus = 0;
if(dwStatus & BLOCK_STATUS_BAD)
{
if(!LB_MarkBlockBad (blockID))
{
return FALSE;
}
}
// We don't currently support setting a block to read-only, so fail if request is
// for read-only and block is not currently read-only.
if(dwStatus & BLOCK_STATUS_READONLY)
{
if(!(FMD_LB_GetBlockStatus(blockID) & BLOCK_STATUS_READONLY))
{
return FALSE;
}
}
return TRUE;
}
BOOL FMD_SB_SetBlockStatus(BLOCK_ID blockID, DWORD dwStatus)
{
SECTOR_ADDR sectorAddr = blockID << SB_NAND_LOG_2_PAGES_PER_BLOCK;
BYTE bStatus = 0;
//RETAILMSG(1,(TEXT("#### FMD_DRIVER:::FMD_sbsetblock \n")));
if(dwStatus & BLOCK_STATUS_BAD)
{
if(!SB_MarkBlockBad (blockID))
{
return FALSE;
}
}
// We don't currently support setting a block to read-only, so fail if request is
// for read-only and block is not currently read-only.
if(dwStatus & BLOCK_STATUS_READONLY)
{
if(!(FMD_SB_GetBlockStatus(blockID) & BLOCK_STATUS_READONLY))
{
return FALSE;
}
}
return TRUE;
}
9、LB_MarkBlockBad()、SB_MarkBlockBad() 标记坏块
BOOL LB_MarkBlockBad(BLOCK_ID blockID)
{
BLOCK_ID blockID_bad = blockID + 1;
DWORD dwStartPage = (blockID_bad << LB_NAND_LOG_2_PAGES_PER_BLOCK) - 1;
BOOL bRet = TRUE;
// RETAILMSG(1, (TEXT("LB_MarkBlockBad 0x%x \n"), dwStartPage));
// Enable chip
NF_nFCE_L();
NF_CLEAR_RB();
NF_MSGLENGTH_512();
// Issue command
// We are dealing with spare area
NF_CMD(CMD_WRITE);
// Set up address
NF_ADDR((4096+LB_POS_BADBLOCK)&0xff); // gjl 2048
NF_ADDR(((4096+LB_POS_BADBLOCK)>>8)&0xff); // gjl 2048
NF_ADDR((dwStartPage) & 0xff);
NF_ADDR((dwStartPage >> 8) & 0xff);
#if LB_NEED_EXT_ADDR
NF_ADDR((dwStartPage >> 16) & 0xff);
#endif
NF_WRDATA_BYTE(BADBLOCKMARK);
// Copmlete the write
NF_CMD(CMD_WRITE2);
// Wait for RB
NF_DETECT_RB(); // Wait tR(max 12us)
if ( NF_RDSTAT & STATUS_ILLACC )
{
RETAILMSG(1, (TEXT("NAND_LB_WriteSectorInfo() ######## Error Programming page (Illigar Access) %d!\n")));
g_pNFConReg->NFSTAT = STATUS_ILLACC; // Write 1 to clear.
bRet = FALSE;
}
else
{
// Check the status of program
NF_CMD(CMD_STATUS);
if( NF_RDDATA_BYTE() & STATUS_ERROR)
{
RETAILMSG(1, (TEXT("NAND_LB_WriteSectorInfo() ######## Error Programming page %d!\n")));
bRet = FALSE;
}
}
// Disable chip select
NF_nFCE_H();
return bRet;
}
BOOL SB_MarkBlockBad(BLOCK_ID blockID)
{
DWORD dwStartPage = blockID << SB_NAND_LOG_2_PAGES_PER_BLOCK;
BOOL bRet = TRUE;
//RETAILMSG(1, (TEXT("SB_MarkBlockBad 0x%x \n"), dwStartPage));
// Enable chip
NF_nFCE_L();
NF_CLEAR_RB();
// Issue command
// We are dealing with spare area
NF_CMD(CMD_READ2);
NF_CMD(CMD_WRITE);
// Set up address
NF_ADDR(SB_POS_BADBLOCK);
NF_ADDR((dwStartPage) & 0xff);
NF_ADDR((dwStartPage >> 8) & 0xff);
#if SB_NEED_EXT_ADDR
NF_ADDR((dwStartPage >> 16) & 0xff);
#endif
NF_WRDATA_BYTE(BADBLOCKMARK);
// Copmlete the write
NF_CMD(CMD_WRITE2);
// Wait for RB
NF_DETECT_RB(); // Wait tR(max 12us)
if ( NF_RDSTAT & STATUS_ILLACC )
{
RETAILMSG(1, (TEXT("NAND_LB_WriteSectorInfo() ######## Error Programming page (Illigar Access) %d!\n")));
g_pNFConReg->NFSTAT = STATUS_ILLACC; // Write 1 to clear.
bRet = FALSE;
}
else
{
// Check the status of program
NF_CMD(CMD_STATUS);
if( NF_RDDATA_BYTE() & STATUS_ERROR)
{
RETAILMSG(1, (TEXT("NAND_LB_WriteSectorInfo() ######## Error Programming page %d!\n")));
bRet = FALSE;
}
}
// Disable chip select
NF_nFCE_H();
return bRet;
}
10、LB_IsBlockBad()、SB_IsBlockBad() 判断是否为坏块
BOOL LB_IsBlockBad(BLOCK_ID blockID)
{
BLOCK_ID blockID_bad = blockID + 1;
DWORD dwPageID = (blockID_bad << LB_NAND_LOG_2_PAGES_PER_BLOCK) - 1;
BOOL bRet = FALSE;
BYTE wFlag;
// Enable the chip
NF_nFCE_L();
NF_CLEAR_RB();
NF_MSGLENGTH_512();
// Issue the command
NF_CMD(CMD_READ);
// Set up address
NF_ADDR((4096+LB_POS_BADBLOCK)&0xff); //gjl 2048
NF_ADDR(((4096+LB_POS_BADBLOCK)>>8)&0xff); // gjl 2048
NF_ADDR((dwPageID) & 0xff);
NF_ADDR((dwPageID >> 8) & 0xff);
#if LB_NEED_EXT_ADDR
NF_ADDR((dwPageID >> 16) & 0xff);
#endif
NF_CMD(CMD_READ3);
// Wait for Ready bit
NF_DETECT_RB(); // Wait tR(max 12us)
// Now get the byte we want
wFlag = (BYTE)(NF_RDDATA_BYTE()&0xff);
if(wFlag != 0xff)
{
RETAILMSG(1, (TEXT("FMDLB: IsBlockBad - Page #: 0x%x \n"), dwPageID));
bRet = TRUE;
}
// Disable the chip
NF_nFCE_H();
return bRet;
}
BOOL SB_IsBlockBad(BLOCK_ID blockID)
{
DWORD dwPageID = blockID << SB_NAND_LOG_2_PAGES_PER_BLOCK;
BOOL bRet = FALSE;
BYTE wFlag;
//RETAILMSG(1,(TEXT("#### FMD_DRIVER:::FMD_sbisblockbad \n")));
// Enable the chip
NF_nFCE_L();
NF_CLEAR_RB();
// Issue the command
NF_CMD(CMD_READ2);
// Set up address
NF_ADDR(SB_POS_BADBLOCK);
NF_ADDR((dwPageID) & 0xff);
NF_ADDR((dwPageID >> 8) & 0xff);
#if SB_NEED_EXT_ADDR
NF_ADDR((dwPageID >> 16) & 0xff);
#endif
// Wait for Ready bit
NF_DETECT_RB(); // Wait tR(max 12us)
// Now get the byte we want
wFlag = (BYTE) NF_RDDATA_BYTE();
if(wFlag != 0xff)
{
RETAILMSG(1, (TEXT("FMDSB: IsBlockBad - Page #: 0x%x \n"), dwPageID));
bRet = TRUE;
}
// Disable the chip
NF_nFCE_H();
return bRet;
}
时间比较仓促，这个Nandflash移植系列的就到这里结束了。