S3C2440启动代码的实现

//============================================================================= // FILE: DEV_NAND.C // DESC: // HIST: //============================================================================= #include "OS_ARCH.H" #include "S3C2440.H" #include "DEV_NAND.H" //============================================================================= // K9F1G08U0C寄存器 //============================================================================= #define rNFCONF (*(U32*)(&S3C2440_GETBASE_NAND->NFCONF)) #define rNFCONT (*(U32*)(&S3C2440_GETBASE_NAND->NFCONT)) #define rNFCMD (*(U32*)(&S3C2440_GETBASE_NAND->NFCMD)) #define rNFADDR (*(U32*)(&S3C2440_GETBASE_NAND->NFADDR)) #define rNFDATA (*(U32*)(&S3C2440_GETBASE_NAND->NFDATA)) #define rNFDATA8 (*(U8 *)(&S3C2440_GETBASE_NAND->NFDATA)) #define rNFECCD0 (*(U32*)(&S3C2440_GETBASE_NAND->NFECCD0)) #define rNFECCD1 (*(U32*)(&S3C2440_GETBASE_NAND->NFECCD1)) #define rNFECCD (*(U32*)(&S3C2440_GETBASE_NAND->NFECCD)) #define rNFSTAT (*(U32*)(&S3C2440_GETBASE_NAND->NFSTAT)) #define rNFSTAT0 (*(U32*)(&S3C2440_GETBASE_NAND->NFSTAT0)) #define rNFSTAT1 (*(U32*)(&S3C2440_GETBASE_NAND->NFSTAT1)) //============================================================================= // K9F1G08U0C命令字 //============================================================================= #define K9F1G_CMD_READID 0x90 // 读器件ID #define K9F1G_CMD_RESET 0xFF // 复位芯片 #define K9F1G_CMD_PAGE_READ1 0x00 // 页读命令周期1 #define K9F1G_CMD_PAGE_READ2 0x30 // 页读命令周期2 #define K9F1G_CMD_RANDOM_DATA_OUTPUT1 0x05 // 随意读命令周期1 #define K9F1G_CMD_RANDOM_DATA_OUTPUT2 0xE0 // 随意读命令周期2 #define K9F1G_CMD_PAGE_PROGRAM1 0x80 // 页编程指令1 #define K9F1G_CMD_PAGE_PROGRAM2 0x10 // 页编程指令2 #define K9F1G_CMD_RANDOM_DATA_INPUT 0x85 // 页内随机编程 #define K9F1G_CMD_BLOCK_ERASE1 0x60 // 块擦除指令1 #define K9F1G_CMD_BLOCK_ERASE2 0xD0 // 块擦除指令2 #define K9F1G_CMD_READ_STATUS 0x70 // 读器件状态 #define K9F1G_CMD_CACHE_PROGRAM1 0x80 // Cache编程周期1 #define K9F1G_CMD_CACHE_PROGRAM2 0x15 // Cache编程周期2 #define K9F1G_CMD_COPY_BACK_READ1 0x00 // 芯片内页拷贝读周期1 #define K9F1G_CMD_COPY_BACK_READ2 0x35 // 芯片内页拷贝读周期2 #define K9F1G_CMD_COPY_BACK_PROGRAM1 0x85 // 芯片内页拷贝编程周期1 #define K9F1G_CMD_COPY_BACK_PROGRAM2 0x10 // 芯片内页拷贝编程周期2 //============================================================================= // K9F1G08U0C基本控制位 //============================================================================= #define NF_CMD(cmd) { rNFCMD = (cmd); } // 传输命令 #define NF_ADDR(addr) { rNFADDR = (addr); } // 传输地址 #define NF_CE_L { rNFCONT &=~(1<<1); } // 打开nandflash片选 #define NF_CE_H { rNFCONT |= (1<<1); } // 关闭nandflash片选 #define NF_RSTECC { rNFCONT |= (1<<4); } // 复位ECC #define NF_MECC_LOCK { rNFCONT |= (1<<5); } // 锁定main区ECC #define NF_MECC_UNLOCK { rNFCONT &=~(1<<5); } // 解锁main区ECC #define NF_SECC_LOCK { rNFCONT |= (1<<6); } // 锁定spare区ECC #define NF_SECC_UNLOCK { rNFCONT &=~(1<<6); } // 解锁spare区ECC #define NF_WAIT_RB { while (!(rNFSTAT & (1<<0))); } // 等待NAND Flash运行就绪 #define NF_DETECT_RB { while (!(rNFSTAT & (1<<2))); } // 等待RnB变高, 发生传输 #define NF_CLEAR_RB { rNFCONT |= (1<<2); } // 清除RnB信号, 检测RnB传输 #define NF_CHECK_BUSY(stat) ((stat)&(1<<6)) #define NF_CHECK_OK(stat) ((stat)&(1<<0)) #define NF_BAD_BLOCK (0xFF) //============================================================================= // 初始化芯片 //============================================================================= void eNandInit(void) { S3C2440_GPIO *gpio = S3C2440_GETBASE_GPIO; S3C2440_NAND *nand = S3C2440_GETBASE_NAND; #define TACLS 1 // 1-clk(0ns) #define TWRPH0 6 // 3-clk(25ns) #define TWRPH1 2 // 1-clk(10ns) gpio->GPACON = (gpio->GPACON & ~(0x3F<<17)) | (0x3F<<17); nand->NFCONF = (TACLS<<12)|(TWRPH0<<8)|(TWRPH1<<4)|(0<<0); nand->NFCONT = (0<<13)|(0<<12)|(0<<10)|(0<<9)|(0<<8)|(1<<6)|(1<<5)|(1<<4)|(1<<1)|(1<<0); } //============================================================================= // 重置芯片 //============================================================================= void eNandReset(void) { NF_CE_L; NF_CLEAR_RB; NF_CMD(K9F1G_CMD_RESET); NF_DETECT_RB; NF_CE_H; } //============================================================================= // 读芯片ID // 返回: ret[31:24]=MID // ret[23:16]=DID // ret[15: 8]=ID3rd // ret[ 7: 0]=ID4th //============================================================================= U32 eNandReadID(void) { U32 id1; U32 id2; U32 id3; U32 id4; NF_CE_L; NF_CLEAR_RB; NF_CMD(K9F1G_CMD_READID); NF_ADDR(0x00); id1 = rNFDATA8; id2 = rNFDATA8; id3 = rNFDATA8; id4 = rNFDATA8; NF_CE_H; return (id1<<24|id2<<16|id3<<8|id4); } //============================================================================= // 随机读数据 // 参数: size: 读取大小, 小于(NAND_BYTES_PER_PAGE * NAND_PAGE_PER_BLOCK * NAND_BLOCK_PER_CHIP) - start // startAddr: 起始地址, 范围[0, NAND_BYTES_PER_PAGE * NAND_PAGE_PER_BLOCK * NAND_BLOCK_PER_CHIP) //============================================================================= U32 eNandRead(U8 *buf, U32 size, U32 startAddr, BOOL skipBadBlock) { U32 pageIndex; U32 pageOffset; U32 pageCount; U32 pageBlock; U32 readBytes; U32 totalSize; pageIndex = startAddr / NAND_BYTES_PER_PAGE; pageOffset= startAddr % NAND_BYTES_PER_PAGE; readBytes = NAND_BYTES_PER_PAGE - pageOffset; readBytes = readBytes < size ? readBytes : size; pageCount = NAND_PAGE_PER_BLOCK * NAND_BLOCK_PER_CHIP; pageBlock = 0; totalSize = 0; while ((pageIndex < pageCount) && (totalSize < size)) { if (pageIndex >= (pageBlock * NAND_PAGE_PER_BLOCK)) { pageBlock++; if (!eNandCheckBlock(pageBlock-1)) { if (skipBadBlock) { pageIndex = pageBlock * NAND_PAGE_PER_BLOCK; continue; } else { return totalSize; } } } if (eNandReadPage(buf, readBytes, pageIndex, pageOffset)) { buf += readBytes; totalSize += readBytes; } pageOffset = 0; readBytes = size - totalSize; if (readBytes > NAND_BYTES_PER_PAGE) readBytes = NAND_BYTES_PER_PAGE; pageIndex++; } return totalSize; } //============================================================================= // 随机读页数据 // 参数: size: 读取大小, 小于(NAND_BYTES_PER_PAGE + NAND_BYTES_PER_PAGE_SPARE) - start // pageIndex: 页索引, 范围[0, NAND_PAGE_PER_BLOCK * NAND_BLOCK_PER_CHIP) // start: 页起始位置, 范围[0, NAND_BYTES_PER_PAGE + NAND_BYTES_PER_PAGE_SPARE) //============================================================================= BOOL eNandReadPage(U8 *buf, U32 size, U32 pageIndex, U32 start) { U32 index; if (pageIndex >= (NAND_PAGE_PER_BLOCK * NAND_BLOCK_PER_CHIP)) return FALSE; if ((start + size) > (NAND_BYTES_P