4阶段 修改适合S3C2440的程序
 
1)、修改include/configs/2440.h

#define CONFIG_S3C2410  1 /* in a SAMSUNG S3C2410 SoC     */
改为:
#define CONFIG_S3C2440

2)、将/include/common.h中的
#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410) || defined(CONFIG_LH7A40X)
改为:
#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410) || defined(CONFIG_LH7A40X) || defined(CONFIG_S3C2440)
3
)、修改/include/s3c24x0.h,将文件中所有的
#ifdef CONFIG_S3C2410
改为:
#if defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
还有nand 的处理:
/* NAND FLASH (see S3C2410 manual chapter 6) */
typedef struct {
 S3C24X0_REG32 NFCONF;
#if defined(CONFIG_S3C2440) //modified for 2440
 S3C24X0_REG32 NFCONT;
#endif
 S3C24X0_REG32 NFCMD;
 S3C24X0_REG32 NFADDR;
 S3C24X0_REG32 NFDATA;
 S3C24X0_REG32 NFSTAT;
 S3C24X0_REG32 NFECC;
} /*__attribute__((__packed__))*/ S3C2410_NAND;

4)、将/cpu/arm920t/s3c24x0/interrupts.c中的
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB)
修改为:
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) || defined (CONFIG_S3C2440)

#elif defined(CONFIG_S3C2410)
改为:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
5
)、将/cpu/arm920t/s3c24x0/serial.c文件中的
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB)
改为:
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) || defined (CONFIG_S3C2440)

#elif defined(CONFIG_S3C2410)
改为:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
将函数static int serial_init_dev(const int dev_index)中的
 uart->UFCON = 0x07;
改为:
 uart->UFCON = 0x00;
6
)、将/cpu/arm920t/s3c24x0/speed.c中的
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB)
改为:
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) || defined (CONFIG_S3C2440)

#elif defined(CONFIG_S3C2410)
改为:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
static ulong get_PLLCLK(int pllreg)中的
    m = ((r & 0xFF000) >> 12) + 8;
    p = ((r & 0x003F0) >> 4) + 2;
    s = r & 0x3;
后面加上:
#if defined(CONFIG_S3C2440)
   if (pllreg == MPLL)
    return((CONFIG_SYS_CLK_FREQ * m * 2) / (p << s));
    else if (pllreg == UPLL)
#endif

/* return HCLK frequency */
ulong get_HCLK(void)
{
    S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
    return((clk_power->CLKDIVN & 0x2) ? get_FCLK()/2 : get_FCLK());
}
改为:
/* return HCLK frequency */
ulong get_HCLK(void)
{
    S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
    if (clk_power->CLKDIVN & 0x6)  
    {
       if ((clk_power->CLKDIVN & 0x6)==2)        return(get_FCLK()/2);
       if ((clk_power->CLKDIVN & 0x6)==6)        return((clk_power->CAMDIVN & 0x100) ? get_FCLK()/6 : get_FCLK()/3);       
       if ((clk_power->CLKDIVN & 0x6)==4)        return((clk_power->CAMDIVN & 0x200) ? get_FCLK()/8 : get_FCLK()/4);       
      
       return(get_FCLK());
    }
    else
        return(get_FCLK());
}
7
)、/cpu/arm920t/s3c24x0/usb_ohci.c中的
#elif defined(CONFIG_S3C2410)
改为:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
8
)、将drivers/rtc/s3c24x0_rtc.c中的
#elif defined(CONFIG_S3C2410)
改为:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
9)、需要在/include/s3c24x0.h文件中添加CAMDIVN定义,将
/* CLOCK & POWER MANAGEMENT (see S3C2400 manual chapter 6) */
/*                          (see S3C2410 manual chapter 7) */
typedef struct {
 S3C24X0_REG32 LOCKTIME;
 S3C24X0_REG32 MPLLCON;
 S3C24X0_REG32 UPLLCON;
 S3C24X0_REG32 CLKCON;
 S3C24X0_REG32 CLKSLOW;
 S3C24X0_REG32 CLKDIVN;
} /*__attribute__((__packed__))*/ S3C24X0_CLOCK_POWER;
改为:
/* CLOCK & POWER MANAGEMENT (see S3C2400 manual chapter 6) */
/*                          (see S3C2410 manual chapter 7) */
typedef struct {
 S3C24X0_REG32 LOCKTIME;
 S3C24X0_REG32 MPLLCON;
 S3C24X0_REG32 UPLLCON;
 S3C24X0_REG32 CLKCON;
 S3C24X0_REG32 CLKSLOW;
 S3C24X0_REG32 CLKDIVN;
#if defined (CONFIG_S3C2440)
         S3C24X0_REG32 CAMDIVN;
#endif
} /*__attribute__((__packed__))*/ S3C24X0_CLOCK_POWER;
 
 
到这里,make一下,把u-boot.bin烧到nand flash,重新启动,在串口工具上应该可以看到熟悉的
U-Boot 1.3.4 (Oct  9 2009 - 07:34:33)

DRAM:  64 MB
NAND:
 
5阶段 修改nand和支持网口芯片DM9000等的驱动
 
1)对cpu\arm920t\s3c24x0里的nand.c进行如下修改:
#include <common.h>
#if 0
#define DEBUGN printf
#else
#define DEBUGN(x, args ...) {}
#endif
#if defined(CONFIG_CMD_NAND)
#if !defined(CFG_NAND_LEGACY)
#include <nand.h>
#include <s3c2410.h>
#define __REGb(x) (*(volatile unsigned char *)(x))
#define __REGi(x) (*(volatile unsigned int *)(x))
#define NF_BASE  0x4e000000
#if defined(CONFIG_S3C2410)
#define NFCONF  __REGi(NF_BASE + 0x0)
#define NFCMD  __REGb(NF_BASE + 0x4)
#define NFADDR  __REGb(NF_BASE + 0x8)
#define NFDATA  __REGb(NF_BASE + 0xc)
#define NFSTAT  __REGb(NF_BASE + 0x10)
#define NFECC0  __REGb(NF_BASE + 0x14)
#define NFECC1  __REGb(NF_BASE + 0x15)
#define NFECC2  __REGb(NF_BASE + 0x16)
#define S3C2410_NFCONF_EN          (1<<15)
#define S3C2410_NFCONF_512BYTE     (1<<14)
#define S3C2410_NFCONF_4STEP       (1<<13)
#define S3C2410_NFCONF_INITECC     (1<<12)
#define S3C2410_NFCONF_nFCE        (1<<11)
#define S3C2410_NFCONF_TACLS(x)    ((x)<<8)
#define S3C2410_NFCONF_TWRPH0(x)   ((x)<<4)
#define S3C2410_NFCONF_TWRPH1(x)   ((x)<<0)
#elif defined(CONFIG_S3C2440)
#define NFCONF  __REGi(NF_BASE + 0x0)
#define NFCONT  __REGi(NF_BASE + 0x4)
#define NFCMD  __REGb(NF_BASE + 0x8)
#define NFADDR  __REGb(NF_BASE + 0xc)
#define NFDATA  __REGb(NF_BASE + 0x10)
#define NFMECCD0 __REGi(NF_BASE + 0x14)
#define NFMECCD1 __REGi(NF_BASE + 0x18)
#define NFSECCD  __REGi(NF_BASE + 0x1C)
#define NFSTAT  __REGb(NF_BASE + 0x20)
#define NFSTAT0  __REGi(NF_BASE + 0x24)
#define NFSTAT1  __REGi(NF_BASE + 0x28)
#define NFMECC0  __REGi(NF_BASE + 0x2C)
#define NFMECC1  __REGi(NF_BASE + 0x30)
#define NFSECC  __REGi(NF_BASE + 0x34)
#define NFSBLK  __REGi(NF_BASE + 0x38)
#define NFEBLK  __REGi(NF_BASE + 0x3c)
#define S3C2440_NFCONT_nCE (1<<1)
#define S3C2440_ADDR_NALE 0x0c
#define S3C2440_ADDR_NCLE 0x08
#endif
static void s3c2410_hwcontrol(struct mtd_info *mtd, int cmd)
{
 struct nand_chip *chip = mtd->priv;
 DEBUGN("hwcontrol(): 0x%02x: ", cmd);
#if defined(CONFIG_S3C2410)
 switch (cmd) {
 case NAND_CTL_SETNCE:
  NFCONF &= ~S3C2410_NFCONF_nFCE;
  DEBUGN("NFCONF=0x%08x\n", NFCONF);
  break;
 case NAND_CTL_CLRNCE:
  NFCONF |= S3C2410_NFCONF_nFCE;
  DEBUGN("NFCONF=0x%08x\n", NFCONF);
  break;
 case NAND_CTL_SETALE:
  chip->IO_ADDR_W = NF_BASE + 0x8;
  DEBUGN("SETALE\n");
  break;
 case NAND_CTL_SETCLE:
  chip->IO_ADDR_W = NF_BASE + 0x4;
  DEBUGN("SETCLE\n");
  break;
 default:
  chip->IO_ADDR_W = NF_BASE + 0xc;
  break;
 }
#elif defined(CONFIG_S3C2440)
 switch (cmd) {
 case NAND_CTL_SETNCE:
  NFCONF &= ~S3C2440_NFCONT_nCE;
  DEBUGN("NFCONF=0x%08x\n", NFCONF);
  break;
 case NAND_CTL_CLRNCE:
  NFCONF |= S3C2440_NFCONT_nCE;
  DEBUGN("NFCONF=0x%08x\n", NFCONF);
  break;
 case NAND_CTL_SETALE:
  chip->IO_ADDR_W = NF_BASE + S3C2440_ADDR_NALE;
  DEBUGN("SETALE\n");
  break;
 case NAND_CTL_SETCLE:
  chip->IO_ADDR_W = NF_BASE + S3C2440_ADDR_NCLE;
  DEBUGN("SETCLE\n");
  break;
 default:
  chip->IO_ADDR_W = NF_BASE + 0x10; //注意是0x10
  break;
 }
#endif
 return;
}
static int s3c2410_dev_ready(struct mtd_info *mtd)
{
 DEBUGN("dev_ready\n");
 return (NFSTAT & 0x01);
}
#ifdef CONFIG_S3C2410_NAND_HWECC
void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode)
{
 DEBUGN("s3c2410_nand_enable_hwecc(%p, %d)\n", mtd ,mode);
 NFCONF |= S3C2410_NFCONF_INITECC;
}
static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
          u_char *ecc_code)
{
 ecc_code[0] = NFECC0;
 ecc_code[1] = NFECC1;
 ecc_code[2] = NFECC2;
 DEBUGN("s3c2410_nand_calculate_hwecc(%p,): 0x%02x 0x%02x 0x%02x\n",
  mtd , ecc_code[0], ecc_code[1], ecc_code[2]);
 return 0;
}
static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
         u_char *read_ecc, u_char *calc_ecc)
{
 if (read_ecc[0] == calc_ecc[0] &&
     read_ecc[1] == calc_ecc[1] &&
     read_ecc[2] == calc_ecc[2])
  return 0;
 printf("s3c2410_nand_correct_data: not implemented\n");
 return -1;
}
#endif
int board_nand_init(struct nand_chip *nand)
{
 u_int32_t cfg;
 u_int8_t tacls, twrph0, twrph1;
 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
 DEBUGN("board_nand_init()\n");
 clk_power->CLKCON |= (1 << 4);
#if defined(CONFIG_S3C2410)
 /* initialize hardware */
 twrph0 = 3; twrph1 = 0; tacls = 0;
 cfg = S3C2410_NFCONF_EN;
 cfg |= S3C2410_NFCONF_TACLS(tacls - 1);
 cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1);
 cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1);
 NFCONF = cfg;
 /* initialize nand_chip data structure */
 nand->IO_ADDR_R = nand->IO_ADDR_W = 0x4e00000c;
 /* read_buf and write_buf are default */
 /* read_byte and write_byte are default */
 /* hwcontrol always must be implemented */
 nand->hwcontrol = s3c2410_hwcontrol;
 nand->dev_ready = s3c2410_dev_ready;
#ifdef CONFIG_S3C2410_NAND_HWECC
 nand->enable_hwecc = s3c2410_nand_enable_hwecc;
 nand->calculate_ecc = s3c2410_nand_calculate_ecc;
 nand->correct_data = s3c2410_nand_correct_data;
 nand->eccmode = NAND_ECC_HW3_512;
#else
 //nand->eccmode = NAND_ECC_SOFT;
nand->eccmode = NAND_ECC_NONE;  /*这个ECC先去掉,否则你使用nand write命令和nand read会boot 不起内核*/
#endif
#ifdef CONFIG_S3C2410_NAND_BBT
 nand->options = NAND_USE_FLASH_BBT;
#else
 nand->options = 0;
#endif
#elif defined(CONFIG_S3C2440)
    twrph0 = 6; twrph1 = 2; tacls = 0;
 cfg = (tacls<<12)|(twrph0<<8)|(twrph1<<4);
 NFCONF = cfg;
 cfg = (1<<6)|(1<<4)|(0<<1)|(1<<0);
 NFCONT = cfg;
/* initialize nand_chip data structure */
 nand->IO_ADDR_R = nand->IO_ADDR_W = (void *)0x4e000010;
 /* read_buf and write_buf are default */
 /* read_byte and write_byte are default */
 /* hwcontrol always must be implemented */
 nand->hwcontrol = s3c2410_hwcontrol;
 
 nand->dev_ready = s3c2410_dev_ready;
 
#ifdef CONFIG_S3C2440_NAND_HWECC
 nand->enable_hwecc = s3c2410_nand_enable_hwecc;
 nand->calculate_ecc = s3c2410_nand_calculate_ecc;
 nand->correct_data = s3c2410_nand_correct_data;
 nand->eccmode = NAND_ECC_HW3_512;
#else
// nand->eccmode = NAND_ECC_SOFT;
nand->eccmode = NAND_ECC_NONE;  /*这个ECC先去掉,否则你使用nand write命令和nand read会boot 不起内核*/
#endif
#ifdef CONFIG_S3C2440_NAND_BBT
 nand->options = NAND_USE_FLASH_BBT;
#else
 nand->options = 0;
#endif
#endif
 DEBUGN("end of nand_init\n");
 return 0;
}
#else
 #error "U-Boot legacy NAND support not available for S3C2410"
#endif
#endif
 
2)对include\configs、mini2440.h进行如下修改:
增加
#define CONFIG_CMD_NAND  /* NAND support   */
#define CFG_ENV_IS_IN_NAND  1    /*  */
#define CFG_ENV_OFFSET   0X40000   
/* u-boot:0x00000--0x40000,param:0x40000--0x60000,kernel:0x60000--0x260000 128K block*/
#define CFG_ENV_SIZE  0x10000 /* Total Size of Environment Sector */

//#define CONFIG_SETUP_MEMORY_TAGS 1
//#define CONFIG_CMDLINE_TAG 1
/*nand flash define*/
#if defined(CONFIG_CMD_NAND)
#define CFG_MAX_NAND_DEVICE 1           //just one nand flash chip on board
#define CFG_NAND_BASE      0x4e000000   //nand flash base address
#define SECTORSIZE 2048
/* one page size*/
#define NAND_SECTOR_SIZE SECTORSIZE
#define NAND_BLOCK_MASK (SECTORSIZE - 1)
/*
 * Nandflash Boot
 */
#define CONFIG_S3C2440_NAND_BOOT 1
#endif
3)增加对网口芯片的支持:
 
同在mini2440.h里,修改Hardware drivers的定义:
/*
 * Hardware drivers
 */
//#define CONFIG_DRIVER_CS8900 1 /* we have a CS8900 on-board */
//#define CS8900_BASE  0x19000300
//#define CS8900_BUS16  1 /* the Linux driver does accesses as shorts */
#define CONFIG_DRIVER_DM9000 1
#define CONFIG_DM9000_BASE 0x20000300
#define DM9000_IO CONFIG_DM9000_BASE
#define DM9000_DATA (CONFIG_DM9000_BASE+4)
#define CONFIG_DM9000_USE_16BIT
 
并确保#define CONFIG_CMD_NET  /* bootp, tftpboot, rarpboot */打开,设置相关TFTP操作的定义,如下:
 
#define CONFIG_BOOTDELAY 3
#define CONFIG_BOOTARGS "root=ramfs devfs=mount console=ttySA0,115200n81"
#define CONFIG_ETHADDR 08:00:3e:26:0a:5b
#define CONFIG_NETMASK          255.255.255.0
#define CONFIG_IPADDR  192.168.1.250
#define CONFIG_SERVERIP  192.168.1.100
#define CONFIG_BOOTFILE "zImage.img"
/*#define CONFIG_BOOTCOMMAND "tftp; bootm"*/
#define CONFIG_BOOTCOMMAND "tftp 0x30008000 zImage.img\; bootm 30008000"
 
到这里,make一下,你可以把zImage通过TFTP给BOOT 起来了。
注意zImage必须使用u-boot-1.3.4\toolsl里的mkp_w_picpath加上文件头才能被u-boot boot起来,本人写了一个sh文件:
#!/bin/sh
mkp_w_picpath -n 'linux-2.6.31' -A arm -O linux -T kernel -C none -a 0x30008000 -e 0x30008040 -d zImage zImage.img
#=================================================
 
(未完,待续)