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U-BOOT移植 (转)

分类： LINUX

2009-04-25 23:13:12

一.U-BOOT板本为U-BOOT-1.1.6

二.新建开发板的目录

1.在board目录下将smdk2410复制为ckz24x0目录

2.将board/ckz24x0/smdk2410.c改名为ckz24x0.c

3.将include/configs/smdk2410.h复制为ckz24x0.h

4.修改顶层Makefile,添加:

Ckz24x0_config : unconfig

       @$(MKCONFIG) $(@:_config=) arm arm920t ckz24x0 NULL  s3c24x0

5.修改board/ckz24x0/Makefile:

COBJS := smdk2410.o flash.o

改为:

COBJS := ckz24x0.o flash.o

 

二.修改SDRAM的配置

 1.根据HCLK设置SDRAM的刷新参数,主要是REFCNT寄存器,修改board/ckz24x0/lowlevel_init.S

#define REFCNT 1113 

改为

#define REFCNT 0x4f4    /*period=7.8125us , HCLK=100MHZ, (2048+1-7.8125*100)*/

 

三.修改board_init函数

1.修改board/ckz24x0/ckz24x0.c中的board_init函数,修改为:

#define S3C2440_MPLL_400MHZ   ((0x5c<<12) | (0x01<<4) | (0x01))

       #define S3C2440_UPLL_48MHZ    ((0x38<<12) | (0x02<<4) | (0x02))

       #define S3C2440_CLKDIV        0x05

 

       #define S3C2410_MPLL_220MHZ   ((0x5c<<12) | (0x04<<4) | (0x00))

       #define S3C2410_UPLL_48MHZ    ((0x28<<12) | (0x01<<4) | (0x02))

       #define S3C2410_CLKDIV        0x03

 

int board_init (void)

{

       S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();

       S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();

 

       /* set up the I/O ports */

       gpio->GPACON = 0x007FFFFF;

       gpio->GPBCON = 0x00044555;

       gpio->GPBUP = 0x000007FF;

       gpio->GPCCON = 0xAAAAAAAA;

       gpio->GPCUP = 0x0000FFFF;

       gpio->GPDCON = 0xAAAAAAAA;

       gpio->GPDUP = 0x0000FFFF;

       gpio->GPECON = 0xAAAAAAAA;

       gpio->GPEUP = 0x0000FFFF;

       gpio->GPFCON = 0x000055AA;

       gpio->GPFUP = 0x000000FF;

       gpio->GPGCON = 0xFF95FFBA;

       gpio->GPGUP = 0x0000FFFF;

       gpio->GPHCON = 0x002AFAAA;

       gpio->GPHUP = 0x000007FF;

 

       if ((gpio->GSTATUS1 == 0x32410000) || (gpio->GSTATUS1 == 0x32410002) ) {

      

       } else {

              /* FCLK:HCLK:PCLK = 1:4:8 */

              clk_power->CLKDIVN = S3C2440_CLKDIV;

 

            __asm__(     "mrc p15,0,r1,c1,c0,0\n"

                          "orr r1,r1,#0xc0000000\n"

                          "mcr p15,0,r1,c1,c0,0\n"

                          :::"r1"

                       );

 

              /* to reduce PLL lock time, adjust the LOCKTIME register */

              clk_power->LOCKTIME = 0xFFFFFF;

 

              /* configure MPLL */

              clk_power->MPLLCON = S3C2440_MPLL_400MHZ;

 

               /* some delay between MPLL and UPLL */

               delay (4000);

 

               /* configure UPLL */

               clk_power->UPLLCON = S3C2440_UPLL_48MHZ;

 

               /* some delay between MPLL and UPLL */

               delay (8000);

 

               /* arch number of SMDK2410-Board */

               gd->bd->bi_arch_number = MACH_TYPE_SMDK2440;

       }

 

       /* adress of boot parameters */

       gd->bd->bi_boot_params = 0x30000100;

 

       icache_enable();

       dcache_enable();

 

       return 0;

}

 

四.在/include/s3c24x0.h中加入2440 的CAMDIVN定义：

typedef struct {

         S3C24X0_REG32   LOCKTIME;

         S3C24X0_REG32   MPLLCON;

         S3C24X0_REG32   UPLLCON;

         S3C24X0_REG32   CLKCON;

         S3C24X0_REG32   CLKSLOW;

         S3C24X0_REG32   CLKDIVN;

         S3C24X0_REG32   CAMDIVN;

} S3C24X0_CLOCK_POWER;

 

五.修改cpu/arm920t/s3c24x0/speed.c,首先要在程序的开头增加如下一行,才可以使用gd变量:

  DECLARE_GLOBAL_DATA_PTR;

 

#define S3C2440_CLKDIVN_PDIVN                  (1<<0)

#define S3C2440_CLKDIVN_HDIVN_MASK             (3<<1)

#define S3C2440_CLKDIVN_HDIVN_1                (0<<1)

#define S3C2440_CLKDIVN_HDIVN_2                (1<<1)

#define S3C2440_CLKDIVN_HDIVN_4_8              (2<<1)

#define S3C2440_CLKDIVN_HDIVN_3_6              (3<<1)

#define S3C2440_CLKDIVN_UCLK                   (1<<3)

 

#define S3C2440_CAMDIVN_CAMCLK_MASK            (0xf<<0)

#define S3C2440_CAMDIVN_CAMCLK_SEL             (1<<4)

#define S3C2440_CAMDIVN_HCLK3_HALF             (1<<8)

#define S3C2440_CAMDIVN_HCLK4_HALF             (1<<9)

#define S3C2440_CAMDIVN_DVSEN                  (1<<12)

 

1.       修改get_PLLCLK()

DECLARE_GLOBAL_DATA_PTR;

static ulong get_PLLCLK(int pllreg)

{

    S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();

    ulong r, m, p, s;

 

    if (pllreg == MPLL)

       r = clk_power->MPLLCON;

    else if (pllreg == UPLL)

       r = clk_power->UPLLCON;

    else

       hang();

 

    m = ((r & 0xFF000) >> 12) + 8;

    p = ((r & 0x003F0) >> 4) + 2;

    s = r & 0x3;

 

    if(gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) {

        return((CONFIG_SYS_CLK_FREQ * m) / (p << s));

    } else {

        return ((CONFIG_SYS_CLK_FREQ*m*2) / (p<

    }

}

 

2.       修改get_HCLK()

/* return HCLK frequency */

ulong get_HCLK(void)

{

    S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();

    unsigned long clkdiv;

    unsigned long camdiv;

    int hdiv = 1;

 

    if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410)

        return((clk_power->CLKDIVN & 0x2) ? get_FCLK()/2 : get_FCLK());

    else {

        clkdiv = clk_power->CLKDIVN;

        camdiv = clk_power->CAMDIVN;

 

        switch(clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {

            case S3C2440_CLKDIVN_HDIVN_1:

                 hdiv = 1;

                 break;

            case S3C2440_CLKDIVN_HDIVN_2:

                 hdiv = 2;

                 break;

            case S3C2440_CLKDIVN_HDIVN_4_8:

                 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;

                 break;

            case S3C2440_CLKDIVN_HDIVN_3_6:

                 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;

                 break;

        }

 

        return get_FCLK() / hdiv;

    }

}

 

 

3.       修改get_PCLK()

/* return PCLK frequency */

ulong get_PCLK(void)

{

    S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();

    unsigned long clkdiv;

    unsigned long camdiv;

    int hdiv = 1;

 

    if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410)

        return((clk_power->CLKDIVN & 0x1) ? get_HCLK()/2 : get_HCLK());

    else {

        clkdiv = clk_power->CLKDIVN;

        camdiv = clk_power->CAMDIVN;

 

        switch(clkdiv & S3C2440_CLKDIVN_HDIVN_MASK) {

            case S3C2440_CLKDIVN_HDIVN_1:

                 hdiv = 1;

                 break;

            case S3C2440_CLKDIVN_HDIVN_2:

                 hdiv = 2;

                 break;

            case S3C2440_CLKDIVN_HDIVN_4_8:

                 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK4_HALF) ? 8 : 4;

                 break;

            case S3C2440_CLKDIVN_HDIVN_3_6:

                 hdiv = (camdiv & S3C2440_CAMDIVN_HCLK3_HALF) ? 6 : 3;

                 break;

        }

 

        return get_FCLK() / hdiv / ((clkdiv & S3C2440_CLKDIVN_PDIVN) ? 2 : 1);

    }

}

 

六.选择 NOR FLASH 型号

1.修改include/configs/ckz24x0.h 把型号改成开发板中的NOR flash型号 AM29LV800

#if 0

#define CONFIG_AMD_LV400    1     /* uncomment this if you have a LV400 flash */

#endif

#define CONFIG_AMD_LV800    1     /* uncomment this if you have a LV800 flash */

重新编译

 

七.配置include/configs/ckz24x0.h中定义CS8900的各个默认地址,如IP,MAC等

   #define CONFIG_ETHADDR        08:00:3e:26:0a:5b

#define CONFIG_NETMASK     255.255.255.0

#define CONFIG_IPADDR            192.168.6.239

#define CONFIG_SERVERIP         192.168.6.15

 

八.添加include/configs/ckz24x0.h

#define CONFIG_SETUP_MEMORY_TAGS  1

#define CONFIG_CMD_LINE_TAG       1

#define CONFIG_BOOTDELAY       3

#define CONFIG_BOOTARGS      "noinitrd console=ttSAC0 root=/dev/mtdblock1 rootfstype=jffs2"

#define CONFIG_BOOTCOMMAND      "nboot 0x32000000 0 0; bootm 0x32000000"

 

九.添加PING命令

修改include/configs/ckz24x0.h:

#define CONFIG_COMMANDS \

                  (CONFIG_CMD_DFL   | \

                  CFG_CMD_CACHE      | \

          CFG_CMD_PING     | \

                  CFG_CMD_REGINFO  | \

                  CFG_CMD_DATE  | \

                  CFG_CMD_ELF)

 

十.修改提示符

修改include/configs/ckz24x0.h:

#define       CFG_PROMPT             "ckz24x0> "    /* Monitor Command Prompt       */

 

十一.支持NAND FLASH

1.       修改配置文件include/configs/ckz24x0.h的宏定义

 

#define CONFIG_COMMANDS \

                  (CONFIG_CMD_DFL   | \

                  CFG_CMD_CACHE      | \

          CFG_CMD_PING     | \

                  CFG_CMD_NAND       | \

                  /*CFG_CMD_EEPROM |*/ \

                  /*CFG_CMD_I2C  |*/ \

                  /*CFG_CMD_USB |*/ \

                  CFG_CMD_REGINFO  | \

                  CFG_CMD_DATE  | \

                  CFG_CMD_ELF)

 

2.       在include/configs/ckz24x0.h中添加三个跟NAND 有关的宏定义

#define CFG_NAND_BASE           0

#define CFG_MAX_NAND_DEVICE     1

#define NAND_MAX_CHIPS          1

 

3.       在include/s3c24x0.h中添加S3C2440_NAND数据结构

/* NAND FLASH (see S3C2440 manual chapter 6) */

typedef struct {

    S3C24X0_REG32  NFCONF;

S3C24X0_REG32  NFCONT;

    S3C24X0_REG32  NFCMD;

    S3C24X0_REG32  NFADDR;

    S3C24X0_REG32  NFDATA;

    S3C24X0_REG32  NFMECCD0;

    S3C24X0_REG32  NFMECCD1;

    S3C24X0_REG32  NFSECCD;    

    S3C24X0_REG32  NFSTAT;

    S3C24X0_REG32  NFESTAT0;

    S3C24X0_REG32  NFESTAT1;

    S3C24X0_REG32  NFMECC0;

    S3C24X0_REG32  NFMECC1;

    S3C24X0_REG32  NFSECC;

    S3C24X0_REG32  NFSBLK;

    S3C24X0_REG32  NFEBLK;

} /*__attribute__((__packed__))*/ S3C2440_NAND;

 

4.       在include/s3c2410.h文件中仿照S3C2410_GetBase_NAND函数定义S3C2440_GetBase_NAND函数

static inline S3C2440_NAND * const S3C2440_GetBase_NAND(void)

{

    return (S3C2440_NAND * const)S3C2410_NAND_BASE;

}

 

5.新建cpu/arm920t/s3c24x0/nand_flash.c

#include

 

#if (CONFIG_COMMANDS & CFG_CMD_NAND) && !defined(CFG_NAND_LEGACY)

#include3c2410.h>

#include

 

DECLARE_GLOBAL_DATA_PTR;

 

#define S3C2440_NFSTAT_READY    (1<<0)

#define S3C2440_NFCONT_nFCE     (1<<1)

 

static void s3c2440_nand_select_chip(struct mtd_info *mtd, int chip)

{

    S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND();

 

    if(chip == -1) {

        s3c2440nand->NFCONT |= S3C2440_NFCONT_nFCE;

    } else {

        s3c2440nand->NFCONT &= ~S3C2440_NFCONT_nFCE;

    }

}

 

static void s3c2440_nand_hwcontrol(struct mtd_info *mtd, int cmd)

{

    S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND();

    struct nand_chip *chip = mtd->priv;

 

    switch (cmd) {

        case NAND_CTL_SETNCE:

        case NAND_CTL_CLRNCE:

             printf("%s: called for NCE\n", __FUNCTION__);

             break;

        case NAND_CTL_SETCLE:

             chip->IO_ADDR_W = (void *) &s3c2440nand->NFCMD;

             break;

        case NAND_CTL_SETALE:

             chip->IO_ADDR_W = (void *) &s3c2440nand->NFADDR;

             break;

        default:

             chip->IO_ADDR_W = (void *) &s3c2440nand->NFDATA;

             break;

    }

}

 

static int s3c2440_nand_devready(struct mtd_info *mtd)

{

    S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND();

 

    return (s3c2440nand->NFSTAT & S3C2440_NFSTAT_READY);

}

 

static void s3c24x0_nand_inithw(void)

{

    S3C2440_NAND *const s3c2440nand = S3C2440_GetBase_NAND();

 

    #define TACLS   0

    #define TWRPH0  4

    #define TWRPH1  2

 

    s3c2440nand->NFCONF = (TACLS<<12) | (TWRPH0<<8) | (TWRPH1<<4);

    s3c2440nand->NFCONT = (1<<4) | (0<<1) | (1<<0);

}

 

void board_nand_init(struct nand_chip *chip)

{

    S3C2440_NAND * const s3c2440nand = S3C2440_GetBase_NAND();

 

    s3c24x0_nand_inithw();

 

    chip->IO_ADDR_R = (void *)&s3c2440nand->NFDATA;

    chip->IO_ADDR_W = (void *)&s3c2440nand->NFDATA;

    chip->hwcontrol = s3c2440_nand_hwcontrol;

    chip->dev_ready = s3c2440_nand_devready;

    chip->select_chip = s3c2440_nand_select_chip;

    chip->options = 0;

  

    chip->eccmode = NAND_ECC_SOFT;

}

 

#endif

 

6.修改cpu/arm920t/s3c24x0/Makefile:

COBJS       = i2c.o interrupts.o serial.o speed.o \

      usb_ohci.o nand_flash.o

 

十二.修改完,已经可以编译U-BOOT

   Make ckz24x0_config

   Make all

   生成u-boot.bin,用HJTAG下载到板上运行

 

八.测试网络

1.把开发板连上网络

2.配置开发板的IP地址:

SMDK2410 # setenv ipaddr 192.168.6.239

SMDK2410 # setenv ethaddr 08:00:3e:26:0a:5b

SMDK2410 # setenv serverip 192.168.6.15

SMDK2410 # saveenv

3.打开电脑的tftp-server

tftp 0x30000000 u-boot.bin

4.       烧写U-BOOT

SMDK2410 #  protect off all

   SMDK2410 #  erase all

   SMDK2410 #  tftp 0x30000000 u-boot.bin

SMDK2410 #  cp.b 0x30000000 0x0 0x1ffff

SMDK2410 #  protect on all

 

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