标签：address fine 启动参数 reg 位置 config res ESS fun
在smdk2440.h里面加上NAND的配置选项
#define CONFIG_CMD_NAND
编译出错
drivers/mtd/nand/s3c2410_nand.c: In function ‘s3c2410_hwcontrol‘: drivers/mtd/nand/s3c2410_nand.c:44: warning: implicit declaration of function ‘s3c2410_get_base_nand‘ drivers/mtd/nand/s3c2410_nand.c:44: warning: initialization makes pointer from integer without a cast drivers/mtd/nand/s3c2410_nand.c:59: error: dereferencing pointer to incomplete type drivers/mtd/nand/s3c2410_nand.c:59: error: dereferencing pointer to incomplete type drivers/mtd/nand/s3c2410_nand.c:62: error: dereferencing pointer to incomplete type
cp drivers/mtd/nand/s3c2410_nand.c drivers/mtd/nand/s3c2440_nand.c
在drivers/mtd/nand/Makefile添加
COBJS-$(CONFIG_NAND_S3C2410) += s3c2410_nand.o
COBJS-$(CONFIG_NAND_S3C2440) += s3c2440_nand.o
同时需要修改配置文件smdk2440.h
/* * NAND configuration */ #ifdef CONFIG_CMD_NAND #define CONFIG_NAND_S3C2410 == >#define CONFIG_NAND_S3C2440 #define CONFIG_SYS_S3C2410_NAND_HWECC ==>#define CONFIG_SYS_S3C2440_NAND_HWECC
在drivers/mtd/nand/s3c2440_nand.c
nt board_nand_init(struct nand_chip *nand) #if 0 cfg = S3C2440_NFCONF_EN; cfg |= S3C2440_NFCONF_TACLS(tacls - 1); cfg |= S3C2440_NFCONF_TWRPH0(twrph0 - 1); cfg |= S3C2440_NFCONF_TWRPH1(twrph1 - 1); #endif cfg = ((tacls-1)<<12)|((twrph0-1)<<8)|((twrph1-1)<<4); writel(cfg, &nand_reg->nfconf); writel((1<<4)|(1<<1)|(1<<0),&nand_reg->nfcont); 。。。 nand->select_chip = s3c2440_nand_select;
添加
static void s3c2440_nand_select(struct mtd_info *mtd, int chipnr) { struct s3c2440_nand *nand = s3c2440_get_base_nand(); switch (chipnr) { case -1: nand->nfcont |= (1<<1); break; case 0: nand->nfcont &= ~(1<<1); break; default: BUG(); } }
重写
static void s3c2440_hwcontrol(struct mtd_info *mtd, int dat, unsigned int ctrl) { struct s3c2440_nand *nand = s3c2440_get_base_nand(); if (ctrl & NAND_CLE) { writeb(dat, &nand->nfcmd); } else if(ctrl & NAND_ALE) { writeb(dat, &nand->nfaddr); } }
重写编译烧录
U-Boot 2014.10 (Nov 01 2018 - 14:26:34) CPUID: 32440001 FCLK: 400 MHz HCLK: 100 MHz PCLK: 50 MHz DRAM: 64 MiB WARNING: Caches not enabled Flash: 2 MiB NAND: 256 MiB *** Warning - bad CRC, using default environment In: serial Out: serial Err: serial Net: dm9000 Warning: dm9000 MAC addresses don‘t match: Address in SROM is ff:ff:ff:ff:ff:ff Address in environment is 00:0c:29:45:c4:c3
增加启动参数
在smdk2440.h里面添加宏
#define CONFIG_BOOTCOMMAND "nand read.jffs2 0x30007FC0 0x60000 0x200000; bootm 0x30007FC0"
如果以前烧写过内核到0x60000的位置，那么现在可以顺利从nor flash启动内核
标签：address fine 启动参数 reg 位置 config res ESS fun
原文地址：https://www.cnblogs.com/hulig7/p/9902129.html
