TI OMAP-L137 dsp程序列程

/* -------------------------------------------------------------------------- FILE : nand.c PURPOSE : NAND driver file PROJECT : DaVinci User Boot-Loader and Flasher AUTHOR : Daniel Allred DESC : Generic NAND driver file for DaVinci EMIFA peripheral -------------------------------------------------------------------------- */ // General type include #include "tistdtypes.h" // This module's header file #include "nand.h" // Device specific CSL #include "device.h" // Device NAND specific stuff #include "device_nand.h" // Misc. utility function include #include "util.h" // Project specific debug functionality #include "debug.h" /************************************************************ * Explicit External Declarations * ************************************************************/ // The device specific table of supported NAND devices extern NAND_CHIP_InfoObj DEVICE_NAND_CHIP_infoTable[]; // The device specific ECC info struct extern NAND_ECC_InfoObj DEVICE_NAND_ECC_info; // The device specific BB info struct extern NAND_BB_InfoObj DEVICE_NAND_BB_info; // The device specific PAGE layout structure extern NAND_PAGE_LayoutObj DEVICE_NAND_PAGE_layout; /************************************************************ * Local Macro Declarations * ************************************************************/ /************************************************************ * Local Function Declarations * ************************************************************/ // Low-level NAND functions read, write, and command functions static VUint8 *LOCAL_flashMakeAddr (Uint32 baseAddr, Uint32 offset); static void LOCAL_flashWriteData(NAND_InfoHandle hNandInfo, Uint32 offset, Uint32 data); static Uint32 LOCAL_flashReadData(NAND_InfoHandle hNandInfo); // Address byte write functions static void LOCAL_flashWriteColAddrBytes(NAND_InfoHandle hNandInfo, Uint32 offset); static void LOCAL_flashWriteRowAddrBytes(NAND_InfoHandle hNandInfo, Uint32 page); #ifndef USE_IN_ROM // Array data writing functions static void LOCAL_flashWriteBytes (NAND_InfoHandle hNandInfo, void *pSrc, Uint32 numBytes); // Function to erase a block static Uint32 LOCAL_eraseBlock(NAND_InfoHandle hNandInfo, Uint32 block, Bool force); #endif // Array data reading functions static void LOCAL_flashReadBytes(NAND_InfoHandle hNandInfo, void *pDest, Uint32 numBytes); // Wait for ready signal seen at NANDFSCR static Uint32 LOCAL_flashWaitForRdy(Uint32 timeout); // Wait for status result from device to read good static Uint32 LOCAL_flashWaitForStatus(NAND_InfoHandle hNandInfo, Uint32 timeout); // page Pointer set function static Uint32 LOCAL_setPagePtr(NAND_InfoHandle hNandInfo,NAND_RegionType regtionType, Uint32 opNum); // Get Chip details static Uint32 LOCAL_flashGetDetails(NAND_InfoHandle hNandInfo); // ONFI CRC check for Read Parameter Page command static Bool LOCAL_onfiParamPageCRCCheck(Uint8 *paramPageData); /************************************************************ * Local Variable Definitions * ************************************************************/ /************************************************************ * Global Variable Definitions * ************************************************************/ #ifdef USE_IN_ROM NAND_InfoObj gNandInfo; #endif /************************************************************ * Global Function Definitions * ************************************************************/ // Initialze NAND interface and find the details of the NAND used NAND_InfoHandle NAND_open(Uint32 baseCSAddr) { NAND_InfoHandle hNandInfo; // Set NandInfo handle #ifdef USE_IN_ROM hNandInfo = (NAND_InfoHandle) &gNandInfo; #else hNandInfo = (NAND_InfoHandle) UTIL_allocMem(sizeof(NAND_InfoObj)); #endif // Set NAND flash base address hNandInfo->flashBase = baseCSAddr; // Init the current block number and good flag hNandInfo->currBlock = -1; hNandInfo->isBlockGood = FALSE; // Use device specific page layout and ECC layout hNandInfo->hPageLayout = &DEVICE_NAND_PAGE_layout; hNandInfo->hEccInfo = &DEVICE_NAND_ECC_info; hNandInfo->hBbInfo = &DEVICE_NAND_BB_info; hNandInfo->hChipInfo = DEVICE_NAND_CHIP_infoTable; // Get the CSOffset ( can be 0 through (DEVICE_EMIF_NUMBER_CE_REGION -1) ) hNandInfo->CSOffset = 0; while (hNandInfo->CSOffset < DEVICE_EMIF_NUMBER_CE_REGION) { if ( hNandInfo->flashBase == (DEVICE_EMIF_FIRST_CE_START_ADDR + (DEVICE_EMIF_INTER_CE_REGION_SIZE * hNandInfo->CSOffset) ) ) { break; } hNandInfo->CSOffset++; } if (hNandInfo->CSOffset == DEVICE_EMIF_NUMBER_CE_REGION) return NULL; // Set EMIF bus width hNandInfo->busWidth = (Uint8) DEVICE_emifBusWidth(); // Setup AEMIF registers for NAND AEMIF->NANDFCR &= ~(3 << 4); AEMIF->NANDFCR |= hNandInfo->CSOffset << 4; AEMIF->NANDFCR |= (0x1 << (hNandInfo->CSOffset)); // NAND enable for CSx (*hNandInfo->hEccInfo->fxnEnable)(hNandInfo); // Send reset command to NAND if ( NAND_reset(hNandInfo) != E_PASS ) return NULL; // Get and set device details if ( LOCAL_flashGetDetails(hNandInfo) != E_PASS ) return NULL; // Send reset command to NAND if ( NAND_reset(hNandInfo) != E_PASS ) return NULL; return hNandInfo; } // Routine to check a particular block to see if it is good or bad Uint32 NAND_badBlockCheck(NAND_InfoHandle hNandInfo, Uint32 block) { Uint8 spareBytes[256]; if (!hNandInfo->hBbInfo->BBCheckEnable) { return E_PASS; } else if (hNandInfo->currBlock != block) { hNandInfo->currBlock = block; // Read and check spare bytes of first page of block (ONFI and normal) NAND_readSpareBytesOfPage(hNandInfo, block, 0, spareBytes); if ((*hNandInfo->hBbInfo->fxnBBCheck)(hNandInfo,spareBytes) != E_PASS) { hNandInfo->isBlockGood = FALSE; return E_FAIL; } // Read and check spare bytes of second page of block (normal) NAND_readSpareBytesOfPage(hNandInfo, block, 1, spareBytes); if ((*hNandInfo->hBbInfo->fxnBBCheck)(hNandInfo,spareBytes) != E_PASS) { hNandInfo->isBlockGood = FALSE; return E_FAIL; } if (hNandInfo->isONFI) { // Read and check spare bytes of last page of block (for ONFI) NAND_readSpareBytesOfPage(hNandInfo, block, (hNandInfo->pagesPerBlock - 1), spareBytes); if ((*hNandInfo->hBbInfo->fxnBBCheck)(hNandInfo,spareBytes) != E_PASS) { hNandInfo->isBlockGood = FALSE; return E_FAIL; } } hNandInfo->isBlockGood = TRUE; return E_PASS; } else if (hNandInfo->isBlockGood == FALSE) { return E_FAIL; } else { return E_PASS; } } // Routine to reset the NAND device Uint32 NAND_reset(NAND_InfoHandle hNandInfo) { // Send reset command to NAND LOCAL_flashWriteData(hNandInfo, DEVICE_NAND_CLE_OFFSET, NAND_RESET ); return LOCAL_flashWaitForRdy(NAND_TIMEOUT); } // Routine to read a page from NAND Uint32 NAND_readPage(NAND_InfoHandle hNandInfo, Uint32 block, Uint32 page, Uint8 *dest) { Uint32 i, currPagePtr, nextPagePtr; //FIXME: the size of this array should be determined by the calcECCByteCnt Uint8 readECC[16]; // This is enough to support 8 Kbyte page devices Uint8 spareBytes[256]; // Get spare bytes of page (includes all stored ECC data) NAND_readSpareBytesOfPage(hNandInfo,block,page,spareBytes); // Write read co