?? k9f2808u0c.c
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#include "tffs/flflash.h"#include "tffs/reedsol.h"/*PIO pins & reg used*/#define AT91C_PIO_PC1 ((unsigned int) 1 << 1) /* Pin Controlled by PC1 */#define AT91C_PC1_BFRDY_SMOE ((unsigned int) AT91C_PIO_PC1) /* SmartMedia Output Enable */#define AT91C_PIO_PC3 ((unsigned int) 1 << 3) /* Pin Controlled by PC13 */#define AT91C_PC3_BFBAA_SMWE ((unsigned int) AT91C_PIO_PC3) /* SmartMedia Write Enable */#define AT91C_PIO_PC14 ((unsigned int) 1 << 14) /* Pin Controlled by PC14 */#define AT91C_PIO_PC15 ((unsigned int) 1 << 15) /* Pin Controlled by PC15 *//* registers */#define AT91C_EBI_CSA 0xFFFFFF60 /* (EBI) Chip Select Assignment Register */#define AT91C_SMC_CSR3 0xFFFFFF7C /*CS3 for nand flash*/ #define AT91C_SMC_CSR4 0xFFFFFF80 /*CS4 for nand flash*/ #define AT91C_PIOC_PER 0xFFFFF800 /* (PIOC) PIO Enable Register */#define AT91C_PIOC_PDR 0xFFFFF804 /* (PIOC) PIO Disable Register */#define AT91C_PIOC_OER 0xFFFFF810 /* (PIOC) Output Enable Register */#define AT91C_PIOC_ODR 0xFFFFF814 /* (PIOC) Output Disable Register */#define AT91C_PIOC_SODR 0xFFFFF830 /* (PIOC) Set Output Data Register */#define AT91C_PIOC_CODR 0xFFFFF834 /* (PIOC) Clear Output Data Register */#define AT91C_PIOC_PDSR 0xFFFFF83C /* (PIOC) Pin Data Status Register */#define AT91C_PIOC_ASR 0xFFFFF870 /* (PIOC) Select A Register */#define NAND_EN() (*(volatile UINT32 *)AT91C_PIOC_CODR = AT91C_PIO_PC15) #define NAND_DIS() (*(volatile UINT32 *)AT91C_PIOC_SODR = AT91C_PIO_PC15)#define READ_REG(val) ((int)(val) = (*(volatile UINT32 *)AT91C_PIOC_PDSR) & AT91C_PIO_PC14)#define WRITE_COMMAND(val) (*(volatile char *)0x50000080 = (char)(val)) /* CLE = A7 */#define WRITE_ADDRESS(val) (*(volatile char *)0x50000040 = (char)(val)) /* ALE = A6 */#define WRITE_DATA(val) (*(volatile char *)0x50000000 = (char)(val)) /* CE = 0 CLE = 0 ALE = 0 */#define READ_DATA(val) ((char)(val) = *(volatile char *)0x50000000) /* CE = 0 CLE = 0 ALE = 0 */#define PAGES_PER_BLOCK 32 /* 32 pages per block on a single chip*//* Flash ID*/#define K9F2808U0C_FLASH 0xEC73/* Flash commands:*/#define SERIAL_DATA_INPUT 0x80#define READ_MODE 0x00#define READ_MODE_2 0x50#define RESET_FLASH 0xff#define SETUP_WRITE 0x10#define SETUP_ERASE 0x60#define CONFIRM_ERASE 0xd0#define READ_STATUS 0x70#define READ_ID 0x90#define FAIL 0x01#define RB 0x40/*for debug*/#undef DEBUG_PRINT printf/* commands for moving flash pointer to areeas A,B or C of page*/typedef enum { AREA_A = READ_MODE, AREA_B = 0x1, AREA_C = READ_MODE_2 } PointerOp;/* customization for this MTD*/typedef struct { unsigned short vendorID; unsigned short chipID; unsigned short pageSize ; /* all....................*/ unsigned short pageMask ; /* ...these...............*/ unsigned short pageAreaSize ; /* .......variables.......*/ unsigned short tailSize ; /* .............interleave*/ unsigned short noOfBlocks ; /* total erasable blocks in flash device*/ FLBuffer *buffer; /* buffer for map through buffer */} Vars;static Vars mtdVars[DRIVES];#define thisVars ((Vars *) vol.mtdVars)#define thisBuffer (thisVars->buffer->data)/*添加*/UINT8 mapBuffer1[600];UINT8 mapBuffer2[600];UINT8 mapBuffer3[600];UINT8 bufferPtr=0;UINT8 *ptr;/*---------------------------------------------------------------------- * flashInit * * initalize PIOC pins & SmartMedia Logic.* *----------------------------------------------------------------------*/void flashInit(){ *(volatile UINT32 *)AT91C_EBI_CSA |= (1<<3); /*SmartMedia Logic*/ *(volatile UINT32 *)AT91C_SMC_CSR4 = 0x22004787; /*CS4*/ *(volatile UINT32 *)AT91C_PIOC_PDR = AT91C_PIO_PC1 | AT91C_PIO_PC3; *(volatile UINT32 *)AT91C_PIOC_ASR = AT91C_PC1_BFRDY_SMOE | AT91C_PC3_BFBAA_SMWE; /* PC14 used for R/#B--input, PC15 used for #CE--output*/ *(volatile UINT32 *)AT91C_PIOC_PER = AT91C_PIO_PC14 | AT91C_PIO_PC15; *(volatile UINT32 *)AT91C_PIOC_OER = AT91C_PIO_PC15; *(volatile UINT32 *)AT91C_PIOC_ODR = AT91C_PIO_PC14;}#if 0/*---------------------------------------------------------------------- * t f f s c p y 1 6 * * Move data in 16-bit words. * * Parameters: * dst : destination buffer * src : source buffer * len : bytes to move * *----------------------------------------------------------------------*/static void tffscpy16 (unsigned char FAR0 *dst, const unsigned char FAR0 *src, int len){ register int i = 0; /* move data in 16-bit words */ for (i = 0; i < (len >> 1); i++) *((unsigned short *) dst + i) = *((unsigned short *) src + i); /* move last byte (if any) */ if (len & 1) *(dst + len-1) = *(src + len-1);}/*---------------------------------------------------------------------- * t f f s s e t 1 6 * * Set data buffer in 16-bit words. * * Parameters: * dst : destination buffer * val : byte value tofill the buffer * len : setination buffer size in bytes * *----------------------------------------------------------------------*/static void tffsset16 (unsigned char FAR0 *dst, unsigned char val, int len){ register unsigned short wval = ((unsigned short)val << 8) | val; register int i = 0; /* set data in 16-bit words */ for (i = 0; i < (len >> 1); i++) *((unsigned short *) dst + i) = wval; /* set last byte (if any) */ if (len & 1) *(dst + len-1) = val;}#endif/*---------------------------------------------------------------------- * w a i t F o r R e a d y * * Wait for the selected device to be ready. * * * Parameters: * void * * Returns: * TRUE if device is ready * *----------------------------------------------------------------------*/FLBoolean waitForReady (void){ int val; do { READ_REG(val); /* R/#B 接PC14，讀R/B狀態(tài)判斷設(shè)備狀態(tài) */ } while(val == 0); return TRUE; }/*---------------------------------------------------------------------- * m a k e C o m m a n d * * Set Page Pointer to Area A, B or C in page. * * * Parameters: * cmd : receives command relevant to area * addr : receives the address to the right area. * modes : mode of operation (EXTRA ...) * *----------------------------------------------------------------------*/static void makeCommand (PointerOp *cmd, CardAddress address, int modes){ int bit8; if (modes & EXTRA) *cmd = AREA_C; else { bit8 = (unsigned short)address & 0x100; if(bit8 == 0) *cmd = AREA_A; else *cmd = AREA_B; }}/*---------------------------------------------------------------------- * s e t A d d r e s s * * Latch address to selected flash device. * * Parameters: * address : address to set. * *----------------------------------------------------------------------*/static void setAddress(CardAddress address ){ WRITE_ADDRESS((unsigned char)address); WRITE_ADDRESS((unsigned char)(address >> 9)); WRITE_ADDRESS((unsigned char)(address >> 17));}/*---------------------------------------------------------------------- * r e a d C o m m a n d * * Issue read command. * * Parametes: * cmd : Command to issue (according to area). * address : address to read from. * *----------------------------------------------------------------------*/static void readCommand (PointerOp cmd, CardAddress address){ WRITE_COMMAND (cmd); /* move flash pointer to respective area of the page*/ setAddress (address); waitForReady();}/*---------------------------------------------------------------------- * w r i t e C o m m a n d * * Issue write command. * * Parametes: * cmd : Command to issue (according to area). * address : address to write to. * *----------------------------------------------------------------------*/static void writeCommand (PointerOp cmd, CardAddress address){ WRITE_COMMAND(cmd); /* move flash pointer to respective area of the page */ WRITE_COMMAND(SERIAL_DATA_INPUT); /* start data loading for write */ setAddress (address);}/*---------------------------------------------------------------------- * r e a d S t a t u s * * Read status of selected flash device. * * Parameters: * * Returns: * Chip status. * *----------------------------------------------------------------------*/unsigned char readStatus(void){ unsigned char chipStatus ; WRITE_COMMAND(READ_STATUS); READ_DATA(chipStatus); return chipStatus;}/*---------------------------------------------------------------------- * w r i t e E x e c u t e * * Execute write. * * Parametes: * Returns: * FLStatus : 0 on success, otherwise failed. * *----------------------------------------------------------------------*/static FLStatus writeExecute (void){ WRITE_COMMAND(SETUP_WRITE); /* execute page program*/ waitForReady(); if(readStatus() & FAIL) return flWriteFault ; return flOK ;}/*---------------------------------------------------------------------- * r e a d O n e S e c t o r * * Read up to one 512-byte block from flash. * * Parameters: * vol : Pointer identifying drive * address : Address to read from. * buffer : buffer to read to. * length : number of bytes to read (up to sector size). * modes : EDC flag etc. * * Returns: * FLStatus: 0 on success, otherwise failed. * *----------------------------------------------------------------------*/static FLStatus readOnePage (FLFlash vol, CardAddress address, /* starting flash address*/ char FAR1 *buffer, /* target buffer */ int length, /* bytes to read */ int modes) /* EDC flag etc.*/{ FLStatus status = flOK; PointerOp cmd; int bit8; /* move flash pointer to areas A,B or C of page*/ makeCommand (&cmd, address, modes); NAND_EN(); readCommand (cmd, address); while(length-->0) { READ_DATA(*(buffer++)); } /*tffscpy16((unsigned char*)buffer, (const unsigned char *) 0x40000000, length );*/ return status;}/*---------------------------------------------------------------------- * w r i t e O n e S e c t o r * * Write data in one 512-byte block to flash. * Assuming that EDC mode never requested on partial block writes. * * Parameters: * vol : Pointer identifying drive * address : Address of sector to write to. * buffer : buffer to write from. * length : number of bytes to write (up to sector size). * modes : OVERWRITE, EDC flags etc. * * Returns: * FLStatus: 0 on success, otherwise failed. * *----------------------------------------------------------------------*/static FLStatus writeOnePage(FLFlash vol, CardAddress address, /* target flash addres */ const char FAR1 *buffer, /* source RAM buffer */ int length, /* bytes to write (up to BLOCK) */ int modes) /* OVERWRITE, EDC flags etc. */{ FLStatus status; PointerOp cmd; int bit8; if (flWriteProtected(vol.socket)) return flWriteProtect; /* move flash pointer to areas A,B or C of page */ makeCommand (&cmd, address, modes); NAND_EN(); writeCommand (cmd, address); /* load data and syndrom*/ while(length-->0) { WRITE_DATA(*(buffer++)); } /* tffscpy16((unsigned char FAR0 *) 0x40000000, (const unsigned char *)buffer, length ); */ status = writeExecute(); #ifdef DEBUG_PRINT DEBUG_PRINT("WRITE: address = 0x%x, length = 0x%x, mode = %d\n", address, length, modes);#endif return status;} /* Core MTD methods - read, write and erase */ /*---------------------------------------------------------------------- * n a n d R e a d * * Read some data from the flash. This routine will be registered as * the read routine for this MTD.* * Parameters: * vol : Pointer identifying drive * address : Address to read from. * buffer : buffer to read to. * length : number of bytes to read (up to sector size). ?? 快捷鍵說明
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