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一、在U-Boot中建立自己的开发板类型，并测试编译。
我的开发板取名为:mini2440.
1. 解压U-Boot1.3.1.
[xinli@localhost BootLoader]$ tar -jxvf u-boot-1.3.1.tar.bz2
2. 进入U-Boot目录,修改顶层Makefile.
在顶层Makefile中增加mini2440编译项(红色的是增加的部分):
smdk2410_config : unconfig
@$(MKCONFIG) $(@:_config=) arm arm920t smdk2410 NULL s3c24x0
mini2440_config : unconfig @$(MKCONFIG) $(@:_config=) arm arm920t mini2440 NULL s3c24x0
各项的意思如下:
arm: CPU的架构(ARCH).arm920t: CPU的类型(CPU)，其对应于cpu/arm920t子目录.mini2440: 开发板的型号(BOARD)，对应于board/mini2440目录.NULL: 开发者/或经销商(vender).s3c24x0: 片上系统(SOC).
接着,修改CROSS_COMPILE为自已的arm gcc编译器，我使用的是系统默认的arm-linux-gcc，故不必再修改相应的CROSS_COMPILE项。否则的话,要在“ifndef CROSS_COMPILE ”之前加上自己交叉编译器的路径，比如若使用crosstool-0.43制作的基于2.6.24内核和gcc-4.1.1-glibc-2.3.2的 ARM9TDMI交叉编译器，则：
CROSS_COMPILE=/home/tekkamanninja/working/gcc4.1.1/gcc-4.1.1-glibc-2.3.2/arm-9tdmi-linux-gnu/bin/arm-9tdmi-linux-gnu-
3. 在/board子目录中建立自己的开发板mini2440目录和相应文件
由于我在上一步板子的开发者/或经销商(vender)中填了NULL ，所以开发板mini2440目录要建在/board子目录 ，否则编译会出错。若开发者/或经销商(vender)中填了FriendlyARM(比如说),那麽开发板mini2440目录一定要建在/board/FriendlyARM目录下 ，否则编译会出错。
[xinli@localhost BootLoader]$ cd u-boot-1.3.1/board
[xinli@localhost board]$ cp -fr smdk2410 mini2440
[xinli@localhost board]$ cd ./mini2440
[xinli@localhost mini2440]$ mv smdk2410.c mini2440.c
然后在/board/mini2440/Makefile中进行如下修改:
COBJS := smdk2410.o flash.o
改为:
COBJS := mini2440.o flash.o
还要在/include/configs目录下建立一个配置文件mini2440.h:
[xinli@localhost board]$ cd /home/xinli/BootLoader/u-boot-1.3.1/include/configs
[xinli@localhost configs]$ cp smdk2410.h mini2440.h
4. 测试编译能否成功
[xinli@localhost u-boot-1.3.1]$ make mini2440_config
Configuring for mini2440 board...
[xinli@localhost u-boot-1.3.1]$ make
测试通过后进行下一步.
二、修改U－Boot中的文件，以同时匹配2440和2410.
1 修改/cpu/arm920t/start.S
#include
#include
#if defined(CONFIG_AT91RM9200DK)
#include /*这是针对AT91RM9200DK开发板的。对于SCB2440V4也有4个LED指示灯，我用来指示程序用行的进度。*/
#endif
......
/*
* the actual start code
*/
start_code:
/*
* set the cpu to SVC32 mode
*/
mrs r0,cpsr
bic r0,r0,#0x1f
orr r0,r0,#0xd3
msr cpsr,r0
#if defined(CONFIG_AT91RM9200DK)
bl coloured_LED_init
bl red_LED_on
#endif
(1) 修改寄存器地址定义
#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410) || defined(CONFIG_S3C2440)
/* turn off the watchdog */
#if defined(CONFIG_S3C2400)
#define pWTCON 0x15300000
#define INTMSK 0x14400008 /* Interupt-Controller base addresses */
#define CLKDIVN 0x14800014 /* clock divisor register */
#else
#define pWTCON 0x53000000
#define INTMSK 0x4A000008 /* Interupt-Controller base addresses */
#define INTSUBMSK 0x4A00001C
#define CLKDIVN 0x4C000014 /* clock divisor register */
#endif
#define CLK_CTL_BASE 0x4C000000 /* tekkaman */#define MDIV_405 0x7f #define PSDIV_405 0x21 /* tekkaman */#define MDIV_200 0xa1 #define PSDIV_200 0x31 /* tekkaman */
......
(2) 修改中断禁止部分
#if defined(CONFIG_S3C2410)
ldr r1, =0x7ff /*根据2410芯片手册，INTSUBMSK有11位可用，
vivi也是0x7ff，U－Boot一直没改过来。*/
ldr r0, =INTSUBMSK
str r1, [r0]
#endif
#if defined(CONFIG_S3C2440) ldr r1, =0x7fff /*根据2440芯片手册，INTSUBMSK有15位可用*/ ldr r0, =INTSUBMSK str r1, [r0]#endif
(3)修改时钟设置（2440的主频为405MHz）
# if defined(CONFIG_S3C2440) /* FCLK:HCLK:PCLK = 1:4:8 */ ldr r0, =CLKDIVN mov r1, #5 str r1, [r0] mrc p15, 0, r1, c1, c0, 0 /*read ctrl register tekkaman*/ orr r1, r1, #0xc0000000 /*Asynchronous tekkaman*/ mcr p15, 0, r1, c1, c0, 0 /*write ctrl register tekkaman*/ /*now, CPU clock is 405.00 Mhz tekkaman*/ mov r1, #CLK_CTL_BASE /* tekkaman*/ mov r2, #MDIV_405 /* mpll_405mhz tekkaman*/ add r2, r2, #PSDIV_405 /* mpll_405mhz tekkaman*/ str r2, [r1, #0x04] /* MPLLCON tekkaman */
#else
/* FCLK:HCLK:PCLK = 1:2:4 */
/* default FCLK is 12 MHz ! 在这里U－Boot有一个错误：以为默认时钟为120MHz。其实如果没有添加以下设置FCLK的语句，芯片内部的PLL是无效的，即FCLK为 12MHz。S3C24x0的芯片手册说得很明白。我一开始没有注意到这一点，是 CalmArrow提醒了我并和我讨论过，他也做过实验证实了这点。在这里对CalmArrow表示感谢和敬意！*/
ldr r0, =CLKDIVN
mov r1, #3
str r1, [r0]
mrc p15, 0, r1, c1, c0, 0 /*read ctrl register tekkaman*/ orr r1, r1, #0xc0000000 /*Asynchronous tekkaman*/ mcr p15, 0, r1, c1, c0, 0 /*write ctrl register tekkaman*/ /*now, CPU clock is 202.8 Mhz tekkaman*/ mov r1, #CLK_CTL_BASE /* tekkaman*/ mov r2, #MDIV_200 /* mpll_200mhz tekkaman*/ add r2, r2, #PSDIV_200 /* mpll_200mhz tekkaman*/ str r2, [r1, #0x04]
# endif#endif /* CONFIG_S3C2400 || CONFIG_S3C2410|| CONFIG_S3C2440 */
红色部分是我添加的，利用vivi的代码。
(4)将从Flash启动改成从NAND Flash启动.
在以下U－Boot的重定向语句段：
#ifdef CONFIG_AT91RM9200
#ifndef CONFIG_SKIP_RELOCATE_UBOOT
relocate: /* relocate U-Boot to RAM */
adr r0, _start /* r0
的后面加上:
#ifdef CONFIG_S3C2440_NAND_BOOT
@ reset NAND
mov r1, #NAND_CTL_BASE
ldr r2, =( (7
在“ldr pc, _start_armboot”之前加入：
#if defined(CONFIG_mini2440_LED)
@ LED1 on u-boot stage 1 is
mov r1, #GPIO_CTL_BASE
add r1, r1, #oGPIO_B
ldr r2,=0x155aa
str r2, [r1, #oGPIO_CON]
mov r2, #0xff
str r2, [r1, #oGPIO_UP]
mov r2, #0x1c0
str r2, [r1, #oGPIO_DAT]
#endif
修改目的：如果看到只有LED1亮了，说明U－Boot的第一阶段已完成！(针对友善之臂SBC2440，不是这块开发板的，必须修改或不添加).
在 “ _start_armboot: .word start_armboot ” 后加入：
.align 2
DW_STACK_START: .word STACK_BASE+STACK_SIZE-4
2 在board/mini2440加入NAND Flash读函数文件，拷贝vivi中的nand_read.c文件到此文件夹即可：
#include
#define __REGb(x) (*(volatile unsigned char *)(x))
#define __REGi(x) (*(volatile unsigned int *)(x))
#define NF_BASE 0x4e000000
#if 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 NFSTAT __REGb(NF_BASE + 0x20)
//#define GPDAT __REGi(GPIO_CTL_BASE+oGPIO_F+oGPIO_DAT)
#define NAND_CHIP_ENABLE (NFCONT &= ~(1> 9) & 0xff;
NFADDR = (i >> 17) & 0xff;
NFADDR = (i >> 25) & 0xff;
NAND_DETECT_RB;
for(j=0; j > 9) & 0xff;
NFADDR = (i >> 17) & 0xff;
NFADDR = (i >> 25) & 0xff;
wait_idle();
for(j=0; j
3 修改board/mini2440/Makefile文件
......
OBJS := mini2440.o nand_read.o flash.o
......
4 修改include/configs/mini2440.h文件，添加如下内容：
......
/*
* Nandflash Boot
*/
#define STACK_BASE 0x33f00000
#define STACK_SIZE 0x8000
//#define UBOOT_RAM_BASE 0x33f80000
/* NAND Flash Controller */
#define NAND_CTL_BASE 0x4E000000
#define bINT_CTL(Nb) __REG(INT_CTL_BASE + (Nb))
/* Offset */
#define oNFCONF 0x00
#if defined(CONFIG_S3C2440)
#define CONFIG_S3C2440_NAND_BOOT 1
/* Offset */
#define oNFCONT 0x04
#define oNFCMD 0x08
#define oNFADDR 0x0c
#define oNFDATA 0x10
#define oNFSTAT 0x20
#define oNFECC 0x2c
#define rNFCONF (*(volatile unsigned int *)0x4e000000)
#define rNFCONT (*(volatile unsigned int *)0x4e000004)
#define rNFCMD (*(volatile unsigned char *)0x4e000008)
#define rNFADDR (*(volatile unsigned char *)0x4e00000c)
#define rNFDATA (*(volatile unsigned char *)0x4e000010)
#define rNFSTAT (*(volatile unsigned int *)0x4e000020)
#define rNFECC (*(volatile unsigned int *)0x4e00002c)
#endif
#if defined(CONFIG_mini2440_LED)
/* GPIO */
#define GPIO_CTL_BASE 0x56000000
#define oGPIO_B 0x10
#define oGPIO_CON 0x0 /* R/W, Configures the pins of the port */
#define oGPIO_DAT 0x4 /* R/W, Data register for port */
#define oGPIO_UP 0x8 /* R/W, Pull-up disable register */
#endif
#if defined(CONFIG_S3C2410)
#define CONFIG_S3C2410_NAND_BOOT 1
/* Offset */
#define oNFCONF 0x00
#define oNFCMD 0x04
#define oNFADDR 0x08
#define oNFDATA 0x0c
#define oNFSTAT 0x10
#define oNFECC 0x14
#define rNFCONF (*(volatile unsigned int *)0x4e000000)
#define rNFCMD (*(volatile unsigned char *)0x4e000004)
#define rNFADDR (*(volatile unsigned char *)0x4e000008)
#define rNFDATA (*(volatile unsigned char *)0x4e00000c)
#define rNFSTAT (*(volatile unsigned int *)0x4e000010)
#define rNFECC (*(volatile unsigned int *)0x4e000014)
#define rNFECC0 (*(volatile unsigned char *)0x4e000014)
#define rNFECC1 (*(volatile unsigned char *)0x4e000015)
#define rNFECC2 (*(volatile unsigned char *)0x4e000016)
#endif
/*JFFS2 Support */
#undef CONFIG_JFFS2_CMDLINE
#define CONFIG_JFFS2_NAND 1
#define CONFIG_JFFS2_DEV "nand0"
#define CONFIG_JFFS2_PART_SIZE 0x4c0000
#define CONFIG_JFFS2_PART_OFFSET 0x40000
/*JFFS2 Support */
/* USB Support 080218 */
#define CONFIG_USB_OHCI
#define CONFIG_USB_STORAGE
#define CONFIG_USB_KEYBOARD
#define CONFIG_DOS_PARTITION
#define CFG_DEVICE_DEREGISTER
#define CONFIG_SUPPORT_VFAT
#define LITTLEENDIAN
/* USB Support 080218 */
...............
5 修改board/mini2440/lowlevel_init.S文件
依照开发板的内存区的配置情况, 修改board/mini2440/lowlevel_init.S文件，我利用友善之臂提供的vivi源码里的信息做了如下更改:
......
#define B1_BWSCON (DW16)
#if defined(CONFIG_DRIVER_NE2000)#define B2_BWSCON (DW16 + UBLB)#else#define B2_BWSCON (DW16)#endif
#define B3_BWSCON (DW16 + WAIT + UBLB)
#define B4_BWSCON (DW16)
#define B5_BWSCON (DW16)
#define B6_BWSCON (DW32)
#define B7_BWSCON (DW32)
......
#if defined(CONFIG_DRIVER_NE2000)#define B2_Tacs 0x3 /* 4clk tekkaman*/#define B2_Tcos 0x3 /* 4clk tekkaman*/#define B2_Tacc 0x7 /* 14clk */#define B2_Tcoh 0x3 /* 4clk tekkaman*/#define B2_Tah 0x3 /* 4clk tekkaman*/#define B2_Tacp 0x3 /* 6clk tekkaman*/#define B2_PMC 0x0 /* normal */
#else
#define B2_Tacs 0x0
#define B2_Tcos 0x0
#define B2_Tacc 0x7
#define B2_Tcoh 0x0
#define B2_Tah 0x0
#define B2_Tacp 0x0
#define B2_PMC 0x0
#endif
……
/* REFRESH parameter */
#define REFEN 0x1 /* Refresh enable */
#define TREFMD 0x0 /* CBR(CAS before RAS)/Auto refresh */
#define Trc 0x3 /* 7clk */
#define Tchr 0x2 /* 3clk */
#if defined(CONFIG_S3C2440)#define Trp 0x2 /* 4clk */#define REFCNT 1012#else#define Trp 0x0 /* 2clk */#define REFCNT 0x0459#endif
6 修改/board/mini2440/mini2440.c
修改其对GPIO和PLL的配置(请参阅开发板的硬件说明和芯片手册)：
......
#define FCLK_SPEED 1
#if FCLK_SPEED==0 /* Fout = 203MHz, Fin = 12MHz for Audio */
#define M_MDIV 0xC3
#define M_PDIV 0x4
#define M_SDIV 0x1
#elif FCLK_SPEED==1
#if defined(CONFIG_S3C2410)
/* Fout = 202.8MHz */
#define M_MDIV 0xA1
#define M_PDIV 0x3
#define M_SDIV 0x1
#endif
#if defined(CONFIG_S3C2440)/* Fout = 405MHz */#define M_MDIV 0x7f #define M_PDIV 0x2#define M_SDIV 0x1#endif
#define USB_CLOCK 1
#if USB_CLOCK==0
#define U_M_MDIV 0xA1
#define U_M_PDIV 0x3
#define U_M_SDIV 0x1
#elif USB_CLOCK==1
#if defined(CONFIG_S3C2410)
#define U_M_MDIV 0x48
#define U_M_PDIV 0x3
#endif
#if defined(CONFIG_S3C2440)#define U_M_MDIV 0x38#define U_M_PDIV 0x2#endif
#define U_M_SDIV 0x2
#endif
......
/* set up the I/O ports */
gpio->GPACON = 0x007FFFFF;
#if defined(CONFIG_mini2440_LED) gpio->GPBCON = 0x00055555; /* 原来是0x00055556,为了防止蜂鸣器响,改为0x00055555.李鑫 */#else gpio->GPBCON = 0x00044555;#endif
......
#if defined(CONFIG_S3C2410)
/* arch number of SMDK2410-Board */
gd->bd->bi_arch_number = MACH_TYPE_SMDK2410;
#endif
#if defined(CONFIG_S3C2440) /* arch number of S3C2440 -Board */ gd->bd->bi_arch_number = MACH_TYPE_S3C2440 ;#endif
/* adress of boot parameters */
gd->bd->bi_boot_params = 0x30000100;
icache_enable();
dcache_enable();
#if defined(CONFIG_mini2440_LED) gpio->GPBDAT = 0x180; //tekkamanninja //int board_init (void)设置完成后，LED1和LED2会亮起！#endif
return 0;
}
7 为了实现NAND Flash的读写，再次修改/include/configs/mini2440.h
(请格外注意：如果编译时报错，在Linux下用KWrite等有高亮显示的文本编辑器看看文件的注释是不是为注释应有的颜色（KWrite中为灰色），如果不是,则将注释删除。因为#define后面的注释被认为是程序的一部分。建议注释和#define分行写)
......
/*
* High Level Configuration Options
* (easy to change)
*/
#define CONFIG_ARM920T 1 /* This is an ARM920T Core */
//#define CONFIG_S3C2410 1 /* in a SAMSUNG S3C2410 SoC */
//#define CONFIG_SBC2410X 1 /* on a friendly-arm SBC-2410X Board */
#define CONFIG_S3C2440 1 /* in a SAMSUNG S3C2440 SoC */#define CONFIG_mini2440 1 /* on a SAMSUNG tekkaman2440 Board */#define CONFIG_mini2440_LED 1 /* Use the LED on Board */
......
/*
* Hardware drivers
*/
#if 0#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 */#endif#if !defined(CONFIG_DRIVER_CS8900)#define CONFIG_DRIVER_DM9000 1#define CONFIG_DM9000_USE_16BIT 1#define CONFIG_DM9000_BASE 0x20000000#define DM9000_IO 0x20000000 #define DM9000_DATA 0x20000004#endif
......
/*
* Command line configuration.
*/
#include
#define CONFIG_CMD_ASKENV
#define CONFIG_CMD_CACHE
#define CONFIG_CMD_DATE
#define CONFIG_CMD_DHCP
#define CONFIG_CMD_ELF
#define CONFIG_CMD_PING
#define CONFIG_CMD_NAND#define CONFIG_CMD_REGINFO
#define CONFIG_CMD_JFFS2 /* JFFS2 Support 080218 */#define CONFIG_CMD_USB /* USB Support 080218 */#define CONFIG_CMD_FAT /* FAT support 080218 */
......
#define CONFIG_ETHADDR 08:00:3e:26:0a:5b #define CONFIG_NETMASK 255.255.255.0#define CONFIG_IPADDR 192.168.1.230#define CONFIG_SERVERIP 192.168.1.5
......
#define CFG_LONGHELP
/* undef to save memory */
#define CFG_PROMPT "[MINI2440]#"
/*Monitor Command Prompt */
#define CFG_CBSIZE 256
/* Console I/O Buffer Size */
......
#define CFG_LOAD_ADDR 0x30008000 /* default load address */
......
/*-----------------------------------------------------------------------
* FLASH and environment organization
*/
#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 */
......
/* timeout values are in ticks */
#define CFG_FLASH_ERASE_TOUT (5*CFG_HZ) /* Timeout for Flash Erase */
#define CFG_FLASH_WRITE_TOUT (5*CFG_HZ) /* Timeout for Flash Write */
#define CFG_ENV_IS_IN_NAND 1#define CFG_ENV_OFFSET 0X30000#define CFG_NAND_LEGACY
//#define CFG_ENV_IS_IN_FLASH 1
#define CFG_ENV_SIZE 0x10000 /* Total Size of Environment Sector */
/*---------------------------------------------------------------------- * NAND flash settings */
#if defined(CONFIG_CMD_NAND)#define CFG_NAND_BASE 0x4E000000 /* NandFlash控制器在SFR区起始寄存器地址 */#define CFG_MAX_NAND_DEVICE 1 /* 支持的最在Nand Flash数据 */#define SECTORSIZE 512 /* 1页的大小 */#define NAND_SECTOR_SIZE SECTORSIZE#define NAND_BLOCK_MASK 511/* 页掩码 */#define ADDR_COLUMN 1 /* 一个字节的Column地址 */ #define ADDR_PAGE 3 /* 3字节的页块地址!!!!!*/#define ADDR_COLUMN_PAGE 4 /* 总共4字节的页块地址!!!!! */#define NAND_ChipID_UNKNOWN 0x00 /* 未知芯片的ID号 */#define NAND_MAX_FLOORS 1#define NAND_MAX_CHIPS 1/* Nand Flash命令层底层接口函数 */#define WRITE_NAND_ADDRESS(d, adr) {rNFADDR = d;}#define WRITE_NAND(d, adr) {rNFDATA = d;}#define READ_NAND(adr) (rNFDATA)#define NAND_WAIT_READY(nand) {while(!(rNFSTAT&(1#define WRITE_NAND_COMMAND(d, adr) {rNFCMD = d;}#define WRITE_NAND_COMMANDW(d, adr) NF_CmdW(d)#if defined(CONFIG_S3C2440)#define NAND_DISABLE_CE(nand) {rNFCONT |= (1#define NAND_ENABLE_CE(nand) {rNFCONT &= ~(1#endif# if defined(CONFIG_S3C2410)#define NAND_DISABLE_CE(nand) {rNFCONF |= (1#define NAND_ENABLE_CE(nand) {rNFCONF &= ~(1#endif/* the following functions are NOP's because S3C24X0 handles this in hardware */#define NAND_CTL_CLRALE(nandptr)#define NAND_CTL_SETALE(nandptr)#define NAND_CTL_CLRCLE(nandptr)#define NAND_CTL_SETCLE(nandptr)/* 允许Nand Flash写校验 */#define CONFIG_MTD_NAND_VERIFY_WRITE 1
#endif /* defined(CONFIG_CMD_NAND) */
......
8、在个文件中添加“CONFIG_S3C2440”，使得原来s3c2410的代码可以编译进来
（1）/include/common.h文件的第474行：
#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410) || defined(CONFIG_LH7A40X) || defined(CONFIG_S3C2440)
（2）/include/s3c24x0.h文件的第85、95、99、110、148、404行：
将“#ifdef CONFIG_S3C2410”改为
#if defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
顺便在其中加入2440 的NAND FLASH 寄存器定义（第160行附近）和CAMDIVN定义（第128行附近）：
......
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;
......
#if defined(CONFIG_S3C2410)
/* NAND FLASH (see S3C2410 manual chapter 6) */
typedef struct {
S3C24X0_REG32 NFCONF;
S3C24X0_REG32 NFCMD;
S3C24X0_REG32 NFADDR;
S3C24X0_REG32 NFDATA;
S3C24X0_REG32 NFSTAT;
S3C24X0_REG32 NFECC;
} /*__attribute__((__packed__))*/ S3C2410_NAND;
#endif
#if defined (CONFIG_S3C2440)/* 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 NFMECC0; S3C24X0_REG32 NFMECC1; S3C24X0_REG32 NFSECC; S3C24X0_REG32 NFSTAT; S3C24X0_REG32 NFESTAT0; S3C24X0_REG32 NFESTAT1; S3C24X0_REG32 NFECC;} /*__attribute__((__packed__))*/ S3C2410_NAND;#endif
（3）/cpu/arm920t/s3c24x0/interrupts.c文件的第33行：
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) || defined (CONFIG_S3C2440)
第38行：
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
在文件中添加“defined(CONFIG_mini2440)”，使得原来SBC2410X的代码可以编译进来。第181行:
#elif defined(CONFIG_SBC2410X) || \
defined(CONFIG_SMDK2410) || \
defined(CONFIG_VCMA9) || defined(CONFIG_mini2440)
（4）/cpu/arm920t/s3c24x0/serial.c文件的第22行：
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) || defined (CONFIG_S3C2440)
第26行：
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
（5）/cpu/arm920t/s3c24x0/speed.c文件的第33行：
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) || defined (CONFIG_S3C2440)
第37行：
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
顺便修改源代码，以匹配s3c2440：
#include
#if defined(CONFIG_S3C2400) || defined (CONFIG_S3C2410) || defined (CONFIG_TRAB) || defined (CONFIG_S3C2440)
#if defined(CONFIG_S3C2400)
#include
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
#include
#endif
DECLARE_GLOBAL_DATA_PTR;
#define MPLL 0
#define UPLL 1
......
static ulong get_PLLCLK(int pllreg)
{
......
m = ((r & 0xFF000) >> 12) + 8;
p = ((r & 0x003F0) >> 4) + 2;
s = r & 0x3;
//lixin
if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410)
return((CONFIG_SYS_CLK_FREQ * m) / (p
}
......
/* return FCLK frequency */
ulong get_FCLK(void)
{
return(get_PLLCLK(MPLL));
}
/* return HCLK frequency */
ulong get_HCLK(void)
{
S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
//tekkaman#if defined(CONFIG_S3C2440) 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());#else return((clk_power->CLKDIVN & 0x2) ? get_FCLK()/2 : get_FCLK());#endif//tekkaman
}
......
（6）/cpu/arm920t/s3c24x0/usb_ohci.c文件的第45行：
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
（7）drivers/rtc/s3c24x0_rtc.c文件的第35行：
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
（8）/cpu/arm920t/s3c24x0/usb.c文件的第27行,31行：
#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
（9）/cpu/arm920t/s3c24x0/i2c.c文件的第35行：
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
第66、85、142、150、174行：
将“#ifdef CONFIG_S3C2410”改为
#if defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
（10）drivers/usb/usb_ohci.c文件的第68行附近：
#if defined(CONFIG_ARM920T) || \
defined(CONFIG_S3C2400) || \
defined(CONFIG_S3C2410) || \
defined(CONFIG_S3C2440) || \
defined(CONFIG_440EP) || \
defined(CONFIG_PCI_OHCI) || \
defined(CONFIG_MPC5200)
9、在 include/linux/mtd/nand_ids.h的结构体nand_flash_ids加入
static struct nand_flash_dev nand_flash_ids[] = {
......
{"Samsung K9F1208U0B", NAND_MFR_SAMSUNG, 0x76, 26, 0, 3, 0x4000, 0},
{NULL,}
};
修改include/linux/mtd/nand.h
/*
* Constants for hardware specific CLE/ALE/NCE function
*/
#if 0
/* Select the chip by setting nCE to low */
#define NAND_CTL_SETNCE 1
/* Deselect the chip by setting nCE to high */
#define NAND_CTL_CLRNCE 2
/* Select the command latch by setting CLE to high */
#define NAND_CTL_SETCLE 3
/* Deselect the command latch by setting CLE to low */
#define NAND_CTL_CLRCLE 4
/* Select the address latch by setting ALE to high */
#define NAND_CTL_SETALE 5
/* Deselect the address latch by setting ALE to low */
#define NAND_CTL_CLRALE 6
/* Set write protection by setting WP to high. Not used! */
#define NAND_CTL_SETWP 7
/* Clear write protection by setting WP to low. Not used! */
#define NAND_CTL_CLRWP 8
#endif
10、修改/lib_arm中的board.c.
......
#include
#include
#include
#include
#include
#include
#include
......
static int display_banner (void)
{
#if defined(CONFIG_mini2440_LED) S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO(); gpio->GPBDAT = 0x100; //tekkamanninja//在串口初始化和console初始化完成，串口输出信息之前，LED1、LED2、LED3会亮起！#endif
printf ("\n\n%s\n\n", version_string);
debug ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
_armboot_start, _bss_start, _bss_end);
#ifdef CONFIG_MODEM_SUPPORT
debug ("Modem Support enabled\n");
#endif
#ifdef CONFIG_USE_IRQ
debug ("IRQ Stack: %08lx\n", IRQ_STACK_START);
debug ("FIQ Stack: %08lx\n", FIQ_STACK_START);
#endif
return (0);
}
......
void start_armboot (void)
{
init_fnc_t **init_fnc_ptr;
char *s;
#ifndef CFG_NO_FLASH
ulong size;
#endif
#if defined(CONFIG_VFD) || defined(CONFIG_LCD)
unsigned long addr;
#endif
/* 为什么放在这里 ? */
# if defined(CONFIG_mini2440_LED) S3C24X0_GPIO * const gpio = S3C24X0_GetBase_GPIO();#endif
......
# if defined(CONFIG_tekkaman2440_LED) gpio->GPBDAT = 0x0; //tekkamanninja//在进入命令提示符之前，四个LED会同时亮起！#endif
/* main_loop() can return to retry autoboot, if so just run it again. */
for (;;) {
main_loop ();
}
/* NOTREACHED - no way out of command loop except booting */
}
11、 修改common/env_nand.c
......
#ifdef CONFIG_INFERNO
#error CONFIG_INFERNO not supported yet
#endif
int nand_legacy_rw (struct nand_chip* nand, int cmd,
size_t start, size_t len,
size_t * retlen, u_char * buf);
extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];extern int nand_legacy_erase(struct nand_chip *nand, size_t ofs, size_t len, int clean);
/* info for NAND chips, defined in drivers/nand/nand.c */
extern nand_info_t nand_info[CFG_MAX_NAND_DEVICE];
......
#else /* ! CFG_ENV_OFFSET_REDUND */
int saveenv(void)
{
ulong total;
int ret = 0;
puts ("Erasing Nand...");
//if (nand_erase(&nand_info[0], CFG_ENV_OFFSET, CFG_ENV_SIZE))
if (nand_legacy_erase(nand_dev_desc + 0, CFG_ENV_OFFSET, CFG_ENV_SIZE, 0))
return 1;
puts ("Writing to Nand... ");
total = CFG_ENV_SIZE;
//ret = nand_write(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
ret = nand_legacy_rw(nand_dev_desc + 0,0x00 | 0x02, CFG_ENV_OFFSET, CFG_ENV_SIZE,&total, (u_char*)env_ptr);
if (ret || total != CFG_ENV_SIZE)
return 1;
puts ("done\n");
return ret;
......
#else /* ! CFG_ENV_OFFSET_REDUND */
/*
* The legacy NAND code saved the environment in the first NAND device i.e.,
* nand_dev_desc + 0. This is also the behaviour using the new NAND code.
*/
void env_relocate_spec (void)
{
#if !defined(ENV_IS_EMBEDDED)
ulong total;
int ret;
total = CFG_ENV_SIZE;
//ret = nand_read(&nand_info[0], CFG_ENV_OFFSET, &total, (u_char*)env_ptr);
ret = nand_legacy_rw(nand_dev_desc + 0, 0x01 | 0x02, CFG_ENV_OFFSET, CFG_ENV_SIZE, &total, (u_char*)env_ptr);
......
12、 在/board/mini2440/mini2440.c文件的末尾添加对Nand Flash 的初始化函数（在后面Nand Flash的操作都要用到）
u- boot运行至第二阶段进入start_armboot()函数。其中nand_init()函数是对nand flash的最初初始化函数。Nand_init()函数在两个文件中实现。其调用与CFG_NAND_LEGACY宏有关，如果没有定义这个宏，系统调用 drivers/nand/nand.c中的nand_init()；否则调用自己在/board/mini2440/mini2440.c中的nand_init()函数。这里我选择第二种方式。
#if defined(CONFIG_CMD_NAND)
typedef enum {
NFCE_LOW,
NFCE_HIGH
} NFCE_STATE;
static inline void NF_Conf(u16 conf)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
nand->NFCONF = conf;
}
static inline void NF_Cmd(u8 cmd)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
nand->NFCMD = cmd;
}
static inline void NF_CmdW(u8 cmd)
{
NF_Cmd(cmd);
udelay(1);
}
static inline void NF_Addr(u8 addr)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
nand->NFADDR = addr;
}
static inline void NF_WaitRB(void)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
while (!(nand->NFSTAT & (1NFDATA = data;
}
static inline u8 NF_Read(void)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
return(nand->NFDATA);
}
static inline u32 NF_Read_ECC(void)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
return(nand->NFECC);
}
#if defined(CONFIG_S3C2440)
static inline void NF_Cont(u16 cont)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
nand->NFCONT = cont;
}
static inline void NF_SetCE(NFCE_STATE s)
{
S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
switch (s) {
case NFCE_LOW:
nand->NFCONT &= ~(1NFCONT |= (1NFCONT |= (1NFCONF &= ~(1NFCONF |= (1NFCONF |= (1NFCONF = (1> 20);
}
#endif
三、交叉编译U－Boot。
在U－Boot的根目录下
$make
一阵English飘过～～～～～～～～～～～～～～～～～～～～～～～。tftp功能是可用的.
本文来自ChinaUnix博客，如果查看原文请点：http://blog.chinaunix.net/u3/93889/showart_1914561.html |
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发表于 2009-04-29 20:02