MDK下2440测试程序

/***********************************************************************/ /* */ /* FlashHW.C: Hardware Layer of NAND Flash Programming Functions */ /* adapted for the Samsung S3C2440 Controller */ /***********************************************************************/ #include "NAND_Error.h" // Error definitions // Register and bit definitions #define NFCONF (*(volatile unsigned long *) (0x4E000000)) #define NFCONT (*(volatile unsigned long *) (0x4E000004)) #define NFCMMD (*(volatile unsigned long *) (0x4E000008)) #define NFADDR (*(volatile unsigned long *) (0x4E00000C)) #define NFDATA (*(volatile unsigned long *) (0x4E000010)) #define NFDATA_C (*(volatile unsigned char *) (0x4E000010)) #define NFMECCD0 (*(volatile unsigned long *) (0x4E000014)) #define NFMECCD1 (*(volatile unsigned long *) (0x4E000018)) #define NFSECCD (*(volatile unsigned long *) (0x4E00001C)) #define NFSTAT (*(volatile unsigned long *) (0x4E000020)) #define NFESTAT0 (*(volatile unsigned long *) (0x4E000024)) #define NFESTAT1 (*(volatile unsigned long *) (0x4E000028)) #define NFMECC0 (*(volatile unsigned long *) (0x4E00002C)) #define NFMECC1 (*(volatile unsigned long *) (0x4E000030)) #define NFSECC (*(volatile unsigned long *) (0x4E000034)) #define NFSBLK (*(volatile unsigned long *) (0x4E000038)) #define NFEBLK (*(volatile unsigned long *) (0x4E00003C)) #define CLKCON (*(volatile unsigned long *) (0x4C00000C)) #define CLKSLOW (*(volatile unsigned long *) (0x4C000010)) #define CLKDIVN (*(volatile unsigned long *) (0x4C000014)) #define INTMSK (*(volatile unsigned long *) (0x4A000008)) #define GPACON (*(volatile unsigned long *) (0x56000000)) #define GPADAT (*(volatile unsigned long *) (0x56000004)) #define GPBCON (*(volatile unsigned long *) (0x56000010)) #define GPBDAT (*(volatile unsigned long *) (0x56000014)) #define GPBUP (*(volatile unsigned long *) (0x56000018)) // NAND Flash Commands #define NAND_CMD_READ0 0x00 // Read mode (1) command #define NAND_CMD_READ1 0x01 // Read mode (2) command #define NAND_CMD_PAGEPROG 0x10 // Auto program command #define NAND_CMD_READSTART 0x30 // Read start command #define NAND_CMD_READ2 0x50 // Read mode (3) command #define NAND_CMD_ERASE1ST 0x60 // Auto block erase 1-st command #define NAND_CMD_STATUS 0x70 // Status read (1) command #define NAND_CMD_STATUS_MULTI 0x71 // Status read (2) command #define NAND_CMD_SDIN 0x80 // Serial data input command #define NAND_CMD_READID 0x90 // ID read (1) command #define NAND_CMD_ERASE2ND 0xD0 // Auto block erase 2-nd command #define NAND_CMD_RESET 0xFF // Reset command // Module's local functions prototypes static int SetAddress_HW (unsigned long adr); static int SetBlockAddress_HW (unsigned long adr); // Buffer for spare area reading or writing unsigned char spare_buf[16]; /************************* Module Exported Functions ***************************/ /*- InitFlashController_HW (...) ----------------------------------------------- * * Initialize Flash Controller * Parameter: bus_width: Bus Width (8, 16 bit) * adr_cycles: Addressing Cycles (3, 4, 5) * page_type: Page Type (0 - Small Page, 1 - Large Page) * clk: Clock Frequency (Hz) * Return Value: NAND_ERROR */ int InitFlashController_HW (void) { // Set important registers to reset values as hardware reset is not functional // through JTAG reset pin INTMSK = 0xFFFFFFFF; CLKCON = 0x001FFFF0; GPACON = 0xFFFFFFFF; // Disable Write Protect, drive nFWP pin high GPBUP |= 0x0080; GPBCON |= 0x4000; GPBDAT |= 0x0080; // Set: TACLS = 3, TWRPH0 = 7, TWRPH1 = 7 NFCONF = (3 << 12) | (7 << 8) | (7 << 4); // Set: Lock spare ECC generation, Lock main data area ECC generation, // Initialize ECC encoder/decoder, NAND flash controller enable NFCONT = (1 << 6) | (1 << 5) | (1 << 4) | (1 << 0); while (!(NFSTAT & 0x01)); // Wait while controller busy NFCMMD = NAND_CMD_RESET; // Reset NAND flash while (!(NFSTAT & 0x01)); // Wait while controller busy NFSBLK = (0x00000000 >> 9); // NAND Flash prog start block address NFEBLK = (0x08000000 >> 9); // NAND Flash prog end block address return (NAND_OK); } /*- ReadPage_HW (...) ---------------------------------------------------------- * * Initialize Flash Programming Functions * Parameter: adr: Page Start Address * sz: Page Size * buf: Page Data * Return Value: NAND_ERROR */ int ReadPage_HW (unsigned long adr, unsigned long sz, unsigned char *buf) { int i; unsigned long *ptr_ul = (unsigned long *)buf; while (!(NFSTAT & 0x01)); // Wait while controller busy NFCMMD = NAND_CMD_READ0; SetAddress_HW(adr); while (!(NFSTAT & 0x01)); // Wait while controller busy for (i = 0; i < ((sz+3)>>2); i++) { // Read requested number of bytes *ptr_ul++ = NFDATA; } while (i < (528>>2)) { // Read remaining bytes to the end of page NFDATA; i++; } while (!(NFSTAT & 0x01)); // Wait while controller busy return (NAND_OK); } /*- CheckBlock_HW (...) -------------------------------------------------------- * * Check if block at requested address is valid * Parameter: adr: Block Start Address * Return Value: NAND_ERROR */ int CheckBlock_HW (unsigned long adr) { int i; unsigned long *ptr_ul = (unsigned long *)spare_buf; while (!(NFSTAT & 0x01)); // Wait while controller busy NFCMMD = NAND_CMD_READ2; SetAddress_HW(adr); while (!(NFSTAT & 0x01)); // Wait while controller busy for (i = 0; i < (16 >> 2); i++) { // Read 16 spare area bytes *ptr_ul++ = NFDATA; } while (!(NFSTAT & 0x01)); // Wait while controller busy NFCMMD = NAND_CMD_READ0; //????? while (!(NFSTAT & 0x01)); // Wait while controller busy // If 6-th byte in spare area is != 0xFF then the block is bad if (spare_buf[5] != 0xFF) return 1; return (NAND_OK); } /*- SetAddress_HW (...) -------------------------------------------------------- * * Set the address according to address word count * Parameter: adr: Address Requested for Setting * adr_type: Address Word Count * page_type: Size of Page * Return Value: NAND_ERROR */ static int SetAddress_HW (unsigned long adr) { NFADDR = adr & 0xFF; // Address word 1st SetBlockAddress_HW(adr); return (NAND_OK); } /*- SetBlockAddress_HW (...) -------------------------------------------------------- * * Set the block address according to address word count * Parameter: adr: Address Requested for Setting * adr_type: Address Word Count * page_type: Size of Page * Return Value: NAND_ERROR */ static int SetBlockAddress_HW (unsigned long adr) { NFADDR = (adr >> 9) & 0xFF; // Address word 1st NFADDR = (