原文链接:[url]
Http://blog.chinaunix
.net/u1/34474/showart.
PHP?id=487416[/url]
首先,U-Boot1.3.1还没有支持s3c2440,移植仍是用2410的文件稍作修改而成的。2440和2410的区别在我移植1.2.0的文章中已经写了,这里不再赘述。
对于1.3.1和1.2.0的差别,我初看了一下,(对于ARM920T内核)应该是增加了对ATMEL公司的AT91RM9200系列处理器的支持。至于S3C24X0系列的芯片,原理上并没有什么大的变化。
一、在U-Boot中建立自己的
开发板类型,并
测试编译。
我为开发板取名叫: tekkaman2440
0 在工作目录下解压U-Boot。
[tekkamanninja@ARM9-Host working]$ tar -xjvf u-boot-1.3.1.tar.bz2
1 进入U-Boot目录,修改Makefile(我在fedora 8 下,比较喜欢使用KWrite)
[tekkamanninja@ARM9-Host working]$ cd u-boot-1.3.1
[tekkamanninja@ARM9-Host u-boot-1.3.1]$ kwrite Makefile
#为tekkaman2440建立编译项
sbc2410x_config: unconfig
@$(MKCONFIG) $(@:_config=) arm arm920t sbc2410x NULL s3c24x0
tekkaman2440_config : unconfig
@$(MKCONFIG) $(@:_config=) arm arm920t tekkaman2440 tekkaman s3c24x0
各项的意思如下:
arm: CPU的
架构(ARCH)
arm920t: CPU的类型(CPU),其对应于cpu/arm920t子目录。
tekkaman2440: 开发板的型号(BOARD),对应于board/tekkaman/tekkaman2440目录。
tekkaman: 开发者/或经销商(vender)。
s3c24x0: 片上系统(SOC)。
同时在“ifndef CROSS_COMPILE ”之前加上自己交叉编译器的路径,比如我使用crosstool-0.43制作的基于2.6.24内核和
GCc-4.1.1-glibc-2.3.2的ARM9TDMI交叉编译器,则:
CROSS_COMPILE=/home/tekkamanninja/working/gcc4.1.1/gcc-4.1.1-glibc-2.3.2/arm-9tdmi-
linux-gnu/bin/arm-9tdmi-linux-gnu-
2 在/board子目录中建立自己的开发板tekkaman2440目录
由于我在上一步板子的开发者/或经销商(vender)中填了 tekkaman ,所以开发板tekkaman2440目录一定要建在/board子目录中的tekkaman目录下 ,否则编译会出错。
[tekkamanninja@ARM9-Host u-boot-1.3.1]$ cd board
[tekkamanninja@ARM9-Host board]$ mkdir tekkaman tekkaman/tekkaman2440
[tekkamanninja@ARM9-Host board]$ cp -arf sbc2410x
#endif
......
start_code:
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
(0)修改寄存器地址定义
#if defined(CONFIG_S3C2400) || defined(CONFIG_S3C2410)|| defined(CONFIG_S3C2440)
#if defined(CONFIG_S3C2400) #define pWTCON 0x15300000 #define INTMSK 0x14400008 #define CLKDIVN 0x14800014 #else #define pWTCON 0x53000000 #define INTMSK 0x4A000008 #define INTSUBMSK 0x4A00001C #define CLKDIVN 0x4C000014 #endif #define CLK_CTL_BASE 0x4C000000 #define MDIV_405 0x7f << 12 #define PSDIV_405 0x21 #define MDIV_200 0xa1 << 12 #define PSDIV_200 0x31 ......
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(1)修改中断禁止部分
#if defined(CONFIG_S3C2410) ldr r1, =0x7ff ldr r0, =INTSUBMSK str r1, [r0] #endif #if defined(CONFIG_S3C2440) ldr r1, =0x7fff ldr r0, =INTSUBMSK str r1, [r0] #endif
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(2)修改时钟设置(2440的主频为405MHz。)
# if defined(CONFIG_S3C2440) ldr r0, =CLKDIVN mov r1, #5 str r1, [r0] mrc p15, 0, r1, c1, c0, 0 orr r1, r1, #0xc0000000 mcr p15, 0, r1, c1, c0, 0
mov r1, #CLK_CTL_BASE mov r2, #MDIV_405 add r2, r2, #PSDIV_405 str r2, [r1, #0x04]
#else ldr r0, =CLKDIVN mov r1, #3 str r1, [r0]
mrc p15, 0, r1, c1, c0, 0 orr r1, r1, #0xc0000000 mcr p15, 0, r1, c1, c0, 0
mov r1, #CLK_CTL_BASE mov r2, #MDIV_200 add r2, r2, #PSDIV_200 str r2, [r1, #0x04]
# endif #endif
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红色部分是我添加的,利用vivi的代码。
(3)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: adr r0, _start ldr r1, _TEXT_BASE cmp r0, r1 beq stack_setup
ldr r2, _armboot_start ldr r3, _bss_start sub r2, r3, r2 add r2, r0, r2
copy_loop: ldmia {r3-r10} stmia {r3-r10} cmp r0, r2 ble copy_loop #endif #endif
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的后面添加上:
#ifdef CONFIG_S3C2440_NAND_BOOT @ reset NAND mov r1, #NAND_CTL_BASE ldr r2, =( (7<<12)|(7<<8)|(7<<4)|(0<<0) ) str r2, [r1, #oNFCONF] ldr r2, [r1, #oNFCONF]
ldr r2, =( (1<<4)|(0<<1)|(1<<0) ) @ Active low CE Control str r2, [r1, #oNFCONT] ldr r2, [r1, #oNFCONT]
ldr r2, =(0x6) @ RnB Clear str r2, [r1, #oNFSTAT] ldr r2, [r1, #oNFSTAT] mov r2, #0xff @ RESET command strb r2, [r1, #oNFCMD]
mov r3, #0 @ wait nand1: add r3, r3, #0x1 cmp r3, #0xa blt nand1
nand2: ldr r2, [r1, #oNFSTAT] @ wait ready tst r2, #0x4 beq nand2
ldr r2, [r1, #oNFCONT] orr r2, r2, #0x2 @ Flash Memory Chip Disable str r2, [r1, #oNFCONT]
@ get read to call C s (for nand_read()) ldr sp, DW_STACK_START @ setup stack pointer mov fp, #0 @ no previous , so fp=0
@ copy U-Boot to RAM ldr r0, =TEXT_BASE mov r1, #0x0 mov r2, #0x30000 bl nand_read_ll tst r0, #0x0 beq ok_nand_read
bad_nand_read: loop2: b loop2 @ infinite loop
ok_nand_read: @ verify mov r0, #0 ldr r1, =TEXT_BASE mov r2, #0x400 @ 4 bytes * 1024 = 4K-bytes Go_next: ldr r3, [r0], #4 ldr r4, [r1], #4 teq r3, r4 bne notmatch subs r2, r2, #4 beq stack_setup bne go_next
notmatch: loop3: b loop3 @ infinite loop
#endif @ CONFIG_S3C2440_NAND_BOOT
#ifdef CONFIG_S3C2410_NAND_BOOT @ reset NAND mov r1, #NAND_CTL_BASE ldr r2, =0xf830 @ initial value str r2, [r1, #oNFCONF] ldr r2, [r1, #oNFCONF] bic r2, r2, #0x800 @ enable chip str r2, [r1, #oNFCONF] mov r2, #0xff @ RESET command strb r2, [r1, #oNFCMD]
mov r3, #0 @ wait nand1: add r3, r3, #0x1 cmp r3, #0xa blt nand1
nand2: ldr r2, [r1, #oNFSTAT] @ wait ready tst r2, #0x1 beq nand2
ldr r2, [r1, #oNFCONF] orr r2, r2, #0x800 @ disable chip str r2, [r1, #oNFCONF]
@ get read to call C s (for nand_read()) ldr sp, DW_STACK_START @ setup stack pointer mov fp, #0 @ no previous , so fp=0
@ copy U-Boot to RAM ldr r0, =TEXT_BASE mov r1, #0x0 mov r2, #0x30000 bl nand_read_ll tst r0, #0x0 beq ok_nand_read
bad_nand_read: loop2: b loop2 @ infinite loop
ok_nand_read: @ verify mov r0, #0 ldr r1, =TEXT_BASE mov r2, #0x400 @ 4 bytes * 1024 = 4K-bytes go_next: ldr r3, [r0], #4 ldr r4, [r1], #4 teq r3, r4 bne notmatch subs r2, r2, #4 beq stack_setup bne go_next
notmatch: loop3: b loop3 @ infinite loop
#endif @ CONFIG_S3C2410_NAND_BOOT |
在“ldr pc, _start_armboot”之前加入:
# if defined(CONFIG_tekkaman2440_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
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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SBC2440V4,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
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2 在board/tekkaman/tekkaman2440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 <config.h>
#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<<1)) #define NAND_CHIP_DISABLE (NFCONT |= (1<<1)) #define NAND_CLEAR_RB (NFSTAT |= (1<<2)) #define NAND_DETECT_RB { while(! (NFSTAT&(1<<2)) );}
#define BUSY 4 inline void wait_idle(void) { while(!(NFSTAT & BUSY)); NFSTAT |= BUSY; }
#define NAND_SECTOR_SIZE 512 #define NAND_BLOCK_MASK (NAND_SECTOR_SIZE - 1)
int nand_read_ll(unsigned char *buf, unsigned long start_addr, int size) { int i, j;
if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)) { return -1; }
NAND_CHIP_ENABLE;
for(i=start_addr; i < (start_addr + size);) { NAND_CLEAR_RB; NFCMD = 0;
NFADDR = i & 0xff; NFADDR = (i >> 9) & 0xff; NFADDR = (i >> 17) & 0xff; NFADDR = (i >> 25) & 0xff;
NAND_DETECT_RB;
for(j=0; j < NAND_SECTOR_SIZE; j++, i++) { *buf = (NFDATA & 0xff); buf++; } } NAND_CHIP_DISABLE; return 0; } # endif
# 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 BUSY 1
inline void wait_idle(void) { int i; while(!(NFSTAT & BUSY)) for(i=0; i<10; i++); }
int nand_read_ll(unsigned char *buf, unsigned long start_addr, int size) { int i, j; if ((start_addr & NAND_BLOCK_MASK) || (size & NAND_BLOCK_MASK)) { return -1; } NFCONF &= ~0x800; for(i=0; i<10; i++); for(i=start_addr; i < (start_addr + size);) { NFCMD = 0; NFADDR = i & 0xff; NFADDR = (i >> 9) & 0xff; NFADDR = (i >> 17) & 0xff; NFADDR = (i >> 25) & 0xff; wait_idle(); for(j=0; j < NAND_SECTOR_SIZE; j++, i++) { *buf = (NFDATA & 0xff); buf++; } } NFCONF |= 0x800; return 0; } # endif
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3 修改board/tekkaman/tekkaman2440/Makefile文件
...... OBjs := tekkaman2440.o nand_read.o flash.o ...... |
4 修改include/configs/tekkaman2440.h文件,添加如下内容:
......
#define STACK_BASE 0x33f00000 #define STACK_SIZE 0x8000 //#define UBOOT_RAM_BASE 0x33f80000
#define NAND_CTL_BASE 0x4E000000 #define bINT_CTL(Nb) __REG(INT_CTL_BASE + (Nb))
#define oNFCONF 0x00
# if defined(CONFIG_S3C2440) #define CONFIG_S3C2440_NAND_BOOT 1
#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)
# if defined(CONFIG_tekkaman2440_LED)
#define GPIO_CTL_BASE 0x56000000 #define oGPIO_B 0x10 #define oGPIO_CON 0x0 #define oGPIO_DAT 0x4 #define oGPIO_UP 0x8
#endif
# if defined(CONFIG_S3C2410) #define CONFIG_S3C2410_NAND_BOOT 1
#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
#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
#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
#endif
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5 修改board/tekkaman/tekkaman2440/lowlevel_init.S文件
依照开发板的内存区的配置情况, 修改board/tekkaman/tekkaman2440/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 #define B2_Tcos 0x3 #define B2_Tacc 0x7 #define B2_Tcoh 0x3 #define B2_Tah 0x3 #define B2_Tacp 0x3 #define B2_PMC 0x0 #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 ……
#define REFEN 0x1 #define TREFMD 0x0 #define Trc 0x3 #define Tchr 0x2
# if defined(CONFIG_S3C2440) #define Trp 0x2 #define REFCNT 1012 #else #define Trp 0x0 #define REFCNT 0x0459 #endif
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6 修改/board/tekkaman/tekkaman2440/tekkaman2440.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 #define M_MDIV 0xC3 #define M_PDIV 0x4 #define M_SDIV 0x1 #elif FCLK_SPEED==1
#if defined(CONFIG_S3C2410)
#define M_MDIV 0xA1 #define M_PDIV 0x3 #define M_SDIV 0x1 #endif
#if defined(CONFIG_S3C2440)
#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 ......
gpio->GPACON = 0x007FFFFF; # if defined(CONFIG_tekkaman2440_LED) gpio->GPBCON = 0x00055556; #else gpio->GPBCON = 0x00044556; #endif ......
#if defined(CONFIG_S3C2410) gd->bd->bi_arch_number = MacH_TYPE_SMDK2410; #endif
#if defined(CONFIG_S3C2440) gd->bd->bi_arch_number = MACH_TYPE_S3C2440 ; #endif
gd->bd->bi_boot_params = 0x30000100; icache_enable(); dcache_enable(); # if defined(CONFIG_tekkaman2440_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/tekkaman2440.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)
......
#define CONFIG_ARM920T 1 //#define CONFIG_S3C2410 1
//#define CONFIG_SBC2410X 1
#define CONFIG_S3C2440 1 #define CONFIG_tekkaman2440 1 #define CONFIG_tekkaman2440_LED 1 ......
#include <config_cmd_default.h>
#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 CFG_LONGHELP
#define CFG_PROMPT "[Tekkaman2440]#"
#define CFG_CBSIZE 256
...... #define CFG_LOAD_ADDR 0x30008000
......
#define CFG_FLASH_ERASE_TOUT (5*CFG_HZ) #define CFG_FLASH_WRITE_TOUT (5*CFG_HZ)
#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
#if defined(CONFIG_CMD_NAND) #define CFG_NAND_BASE 0x4E000000
#define CFG_MAX_NAND_DEVICE 1 #define SECTORSIZE 512
#define NAND_SECTOR_SIZE SECTORSIZE #define NAND_BLOCK_MASK 511
#define ADDR_COLUMN 1 #define ADDR_PAGE 3
#define ADDR_COLUMN_PAGE 4
#define NAND_ChipID_UNKNOWN 0x00
#define NAND_MAX_FLOORS 1 #define NAND_MAX_CHIPS 1
#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<<0)));} #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<<1);} #define NAND_ENABLE_CE(nand) {rNFCONT &= ~(1<<1);} #endif # if defined(CONFIG_S3C2410) #define NAND_DISABLE_CE(nand) {rNFCONF |= (1<<11);} #define NAND_ENABLE_CE(nand) {rNFCONF &= ~(1<<11);} #endif
#define NAND_CTL_CLRALE(nandptr) #define NAND_CTL_SETALE(nandptr) #define NAND_CTL_CLRCLE(nandptr) #define NAND_CTL_SETCLE(nandptr)
#define CONFIG_MTD_NAND_VERIFY_WRITE 1 ...... #endif
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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)
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(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)
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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 } S3C24X0_CLOCK_POWER; ...... #if defined(CONFIG_S3C2410)
typedef struct { S3C24X0_REG32 NFCONF; S3C24X0_REG32 NFCMD; S3C24X0_REG32 NFADDR; S3C24X0_REG32 NFDATA; S3C24X0_REG32 NFSTAT; S3C24X0_REG32 NFECC; } S3C2410_NAND; #endif #if defined (CONFIG_S3C2440)
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; } S3C2410_NAND; #endif
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(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)
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第38行:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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在个文件中添加“defined(CONFIG_tekkaman2440)”,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_tekkaman2440)
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(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)
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第26行:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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(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)
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第37行:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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顺便修改源代码,以匹配s3c2440:
static ulong get_PLLCLK(int pllreg) { ......
m = ((r & 0xFF000) >> 12) + 8; p = ((r & 0x003F0) >> 4) + 2; s = r & 0x3; //tekkaman
#if defined(CONFIG_S3C2440) if (pllreg == MPLL) return((CONFIG_SYS_CLK_FREQ * m * 2) / (p << s)); else if (pllreg == UPLL) #endif //tekkaman
return((CONFIG_SYS_CLK_FREQ * m) / (p << s)); } ......
ulong get_FCLK(void) { return(get_PLLCLK(MPLL)); }
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
} ......
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(6)/cpu/arm920t/s3c24x0/usb_ohci.c文件的第45行:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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(7)drivers/rtc/s3c24x0_rtc.c文件的第35行:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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(8)/cpu/arm920t/s3c24x0/usb.c文件的第31行:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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(9)/cpu/arm920t/s3c24x0/i2c.c文件的第35行:
#elif defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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第66、85、142、150、174行:
将“#ifdef CONFIG_S3C2410”改为
#if defined(CONFIG_S3C2410) || defined (CONFIG_S3C2440)
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(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)
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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,} };
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修改include/linux/mtd/nand.h
#if 0
#define NAND_CTL_SETNCE 1
#define NAND_CTL_CLRNCE 2
#define NAND_CTL_SETCLE 3
#define NAND_CTL_CLRCLE 4
#define NAND_CTL_SETALE 5
#define NAND_CTL_CLRALE 6
#define NAND_CTL_SETWP 7
#define NAND_CTL_CLRWP 8 #endif
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10、修改/lib_arm中的board.c。
...... #include <common.h> #include <command.h> #include <malloc.h> #include <devices.h> #include <version.h> #include <net.h> #include <s3c2410.h> ...... static int display_banner (void) { # if defined(CONFIG_tekkaman2440_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 # if defined(CONFIG_tekkaman2440_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 for (;;) { main_loop (); } }
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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);
extern nand_info_t nand_info[CFG_MAX_NAND_DEVICE];
......
#else 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
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);
......
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12、 在/board/tekkaman/tekkaman2440/tekkaman2440.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/tekkaman/tekkaman2440/tekkaman2440.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 & (1<<0))); }
static inline void NF_Write(u8 data) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFDATA = 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 &= ~(1<<1); break; case NFCE_HIGH: nand->NFCONT |= (1<<1); break; } }
static inline void NF_Init_ECC(void) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFCONT |= (1<<4); }
#else static inline void NF_SetCE(NFCE_STATE s) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); switch (s) { case NFCE_LOW: nand->NFCONF &= ~(1<<11); break; case NFCE_HIGH: nand->NFCONF |= (1<<11); break; } }
static inline void NF_Init_ECC(void) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND(); nand->NFCONF |= (1<<12); } #endif
extern ulong nand_probe(ulong physadr);
static inline void NF_Reset(void) { int i;
NF_SetCE(NFCE_LOW); NF_Cmd(0xFF); for(i = 0; i < 10; i++); NF_WaitRB(); NF_SetCE(NFCE_HIGH); }
static inline void NF_Init(void) { #if 0 #define TACLS 0 #define TWRPH0 3 #define TWRPH1 0 #else #define TACLS 0 #define TWRPH0 4 #define TWRPH1 2 #endif
#if defined(CONFIG_S3C2440) NF_Conf((TACLS<<12)|(TWRPH0<<8)|(TWRPH1<<4)); NF_Cont((1<<6)|(1<<4)|(1<<1)|(1<<0)); #else NF_Conf((1<<15)|(0<<14)|(0<<13)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0)); #endif NF_Reset(); }
void nand_init(void) { S3C2410_NAND * const nand = S3C2410_GetBase_NAND();
NF_Init(); #ifdef DEBUG printf("NAND flash probing at 0x%.8lX\n", (ulong)nand); #endif printf ("%4lu MB\n", nand_probe((ulong)nand) >> 20); } #endif
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三、交叉编译U-Boot。
在U-Boot的根目录下
$make
一阵English飘过~~~~~~~~~~~~~~~~~~~~~~~
这篇文章的移植使用CS8900网卡。tftp功能是可用的.
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