本文詳細介紹了新版本的u-boot-2014_04在tq2440平臺上的移植過程，期間參考了網上的其他移植文檔，還有韋東山的移植uboot視頻，講的很好。下面是共享鏈接，歡迎下載，一同學習。其中有移植文檔和patch。
http://pan.baidu.com/s/1jGxEYQQ
作者:彭東林
郵箱：pengdonglin137@163.com
QQ：405728433
一、首先建立自己的開發板
二、 配置時鐘三、 移植NOR Flash四、 移植網卡DM9000五、 支持NAND FLASH讀寫六、 修改代碼支持NOR FLASH啟動七、 保存環境變量到NAND FLASH并添加分區八、 支持NAND FLASH啟動九、 支持燒寫yaffs文件系統十、 添加NAND FLASH 硬件ECC十一、 最后十二、 制作補丁十三、 用到的一些命令：
到官網http://ftp.denx.de/pub/u-boot/下載u-boot-2014.04.tar.bz2
解壓后在board/samsung/目錄下仍然沒有2440,雖然沒有直接支持2440開發板,但其代碼已經支持,只需添加相關配置即可。
一、首先建立自己的開發板
拷貝board/samsung/smdk2410/目錄到board/tq2440
pengdl@debian:~/work/tq2440/u-boot-2014.04$cp-aboard/samsung/smdk2410/board/tq2440
進入board/tq2440目錄修改
pengdl@debian:~/work/tq2440/u-boot-2014.04/board/tq2440$mvsmdk2410.ctq2440.c
修改該目錄下的Makefile
obj-y :=tq2440.o
拷貝配置文件(使用相似的smdk2410開發板的配置文件)
pengdl@debian:~/work/tq2440/u-boot-2014.04$cpinclude/configs/smdk2410.hinclude/configs/tq2440.h
增加開發板配置選項
在頂層目錄下的Makefile中搜索不到smdk2410
在頂層目錄執行如下命令
pengdl@debian:~/work/tq2440/u-boot-2014.04$grep"smdk2410"*-nR
./boards.cfg:74:
smdk2410armarm920t-samsungs3c24x0
./MAINTAINERS:774: smdk2410 ARM920T
./board/samsung/smdk2410/Makefile:28:COBJS :=smdk2410.o
./board/tq2440/Makefile:28:COBJS :=smdk2410.o
./arch/arm/include/asm/mach-types.h:1646:#definemachine_is_smdk2410() (machine_arch_type==MACH_TYPE_SMDK2410)
./arch/arm/include/asm/mach-types.h:1648:#definemachine_is_smdk2410() (0)
從這里知道在頂層目錄下的boards.cfg文件中定義了smdk2410開發板的配置選項，仿照它定義TQ2440開發板的配置選項
##Status,Arch,CPU:SPLCPU,SoC,Vendor,Boardname,Target,Options,Maintainers
###########################################################################################################
Activearmarm920ts3c24x0-tq2440tq2440--
由于我在board目錄下創建開發板目錄，所以Vendor指定為空
二、配置時鐘
先大致看一下配置文件include/configs/tq2440.h
/*
*HighLevelConfigurationOptions
*(easytochange)
*/
#defineCONFIG_ARM920T /*ThisisanARM920TCore*/
#defineCONFIG_S3C24X0 /*inaSAMSUNGS3C24x0-typeSoC*/
#defineCONFIG_S3C2410 /*specificallyaSAMSUNGS3C2410SoC*/
#defineCONFIG_SMDK2410 /*onaSAMSUNGSMDK2410Board*/
這里是高級別的一些配置，配置了S3C2410SoC和SMDK2410Board，跟我使用的開發板不一致
根據我自己的開發板tq2440進行如下配置
//#defineCONFIG_S3C2410/*specificallyaSAMSUNGS3C2410SoC*/
#defineCONFIG_S3C2440
//#defineCONFIG_SMDK2410/*onaSAMSUNGSMDK2410Board*/
#defineCONFIG_AUTO_COMPLETE//開啟命令自動補全
#defineCONFIG_SYS_PROMPT "TQ2440#" //命令提示符
屏蔽一些暫時不用的支持，用的時候再加上
#if0
#defineCONFIG_CS8900 /*wehaveaCS8900on-board*/
#defineCONFIG_CS8900_BASE 0x19000300
#defineCONFIG_CS8900_BUS16 /*thelinuxdriverdoesaccessesasshorts*/
#endif
#if0
#defineCONFIG_USB_OHCI
#defineCONFIG_USB_KEYBOARD
#defineCONFIG_USB_STORAGE
#defineCONFIG_DOS_PARTITION
#endif
//#defineCONFIG_CMD_DHCP
//#defineCONFIG_CMD_NAND
//#defineCONFIG_CMD_PING
//#defineCONFIG_CMD_REGINFO
//#defineCONFIG_CMD_USB
#if0
#defineCONFIG_CMD_FAT
#defineCONFIG_CMD_EXT2
#defineCONFIG_CMD_UBI
#defineCONFIG_CMD_UBIFS
#defineCONFIG_CMD_MTDPARTS
#defineCONFIG_MTD_DEVICE
#defineCONFIG_MTD_PARTITIONS
#defineCONFIG_YAFFS2
#defineCONFIG_RBTREE
#endif
看下鏈接腳本arch/arm/cpu/u-boot.lds
CPUDIR/start.o(.text*)
從這里可以知道u-boot執行的第一個文件是arch/arm/cpu/arm920t/start.S
/*FCLK:HCLK:PCLK=1:2:4*/
/*defaultFCLKis120MHz!*/
ldr r0,=CLKDIVN
mov r1,#3
str r1,[r0]
上面幾行代碼是針對S3C2410的
添加時鐘初始化代碼如下
#ifdefined(CONFIG_S3C2410)
ldr r1,=0x3ff
ldr r0,=INTSUBMSK
str r1,[r0]
#endif
#ifdefined(CONFIG_S3C2440)
ldr r1,=0x7fff
ldr r0,=INTSUBMSK //屏蔽子中斷
str r1,[r0]
#endif/*CONFIG_S3C2440*/
#ifdefined(CONFIG_S3C2440)
#defineMPLLCON 0x4C000004 //系統主頻配置寄存器
#defineUPLLCON 0x4C000008//USB頻率配置寄存器
#defineCAMDIVN 0x4C000018//照相機時鐘分頻寄存器
ldrr0,=CAMDIVN
movr1,#0
strr1,[r0]
ldrr0,=CLKDIVN
movr1,#0x05
strr1,[r0]
/*如果HDIVN不等于0，CPU必須設置為異步總線模式*/
mrcp15,0,r0,c1,c0,0
orrr0,r0,#0xc0000000
mcrp15,0,r0,c1,c0,0
ldrr0,=UPLLCON
ldrr1,=0x38022//USB時鐘48MHZ
strr1,[r0]
/*
**WhenyousetMPLL&UPLLvalues,youhavetosettheUPLL
**valuefirstandthentheMPLLvalue.(Needsintervals
**approximately7NOP)
*/
nop
nop
nop
nop
nop
nop
nop
ldrr0,=MPLLCON
ldrr1,=0x5c011//CPU時鐘400MHZ
strr1,[r0]
#else
/*FCLK:HCLK:PCLK=1:2:4*/
/*defaultFCLKis120MHz!*/
ldr r0,=CLKDIVN
mov r1,#3
str r1,[r0]
#endif/*CONFIG_S3C2440*/
#endif /*CONFIG_S3C24X0*/
board/tq2440/tq2440.c中board_early_init_f()函數也初始化了時鐘，因為我在start.S中已初始化了時鐘，所以屏蔽掉board_early_init_f()中對時鐘的初始化代碼
// structs3c24x0_clock_power*constclk_power=
// s3c24x0_get_base_clock_power();
structs3c24x0_gpio*constgpio=s3c24x0_get_base_gpio();
#if0
/*toreducePLLlocktime,adjusttheLOCKTIMEregister*/
writel(0xFFFFFF,&clk_power->locktime);
/*configureMPLL*/
writel((M_MDIV<<12)+(M_PDIV<<4)+M_SDIV,
&clk_power->mpllcon);
/*somedelaybetweenMPLLandUPLL*/
pll_delay(4000);
/*configureUPLL*/
writel((U_M_MDIV<<12)+(U_M_PDIV<<4)+U_M_SDIV,
&clk_power->upllcon);
/*somedelaybetweenMPLLandUPLL*/
pll_delay(8000);
#endif
可以先配置u-boot支持直接燒寫進內存SDRAM運行
修改配置文件tq2440.h
#defineCONFIG_SYS_TEXT_BASE 0x32000000
CONFIG_SYS_TEXT_BASE指定了代碼的加載地址，待會編譯好后生成可執行二進制文件u—boot.bin，就要把u-boot.bin下載到該地址
我們現在需要直接燒寫進內存運行，而底層初始化代碼還沒移植，所以我們需要跳過底層初始化
查看arch/arm/cpu/arm920t/start.S
#ifndefCONFIG_SKip_LOWLEVEL_INIT
bl cpu_init_crit
#endif
如果沒有定義CONFIG_SKIP_LOWLEVEL_INIT就跳轉cpu_init_crit函數執行，該函數進行了一些底層的初始化，比如內存。因為下面我們直接將u-boot下載到內存中運行，如果在內存中運行的同時再初始化內存，那么內存中的數據代碼會遭到破壞。
所以我們在配置文件tq2440.h中定義該宏
#defineCONFIG_SKIP_LOWLEVEL_INIT
修改一下頂層Makefile：
202CROSS_COMPILE?=arm-linux-
ARCH就不用我們手動配置了，因為在執行maketq2440_config時，會解析boards.cfg文件，得到ARCH的值。
pengdl@debian:~/work/tq2440/u-boot-2014.04$maketq2440_config
編譯完成生成可執行二進制文件u—boot.bin,開發板啟動原有好的u-boot
將u-boot.bin下載到SDRAM的0x32000000地址，然后go0x32000000運行
EmbedSky>tftp0x32000000u-boot.bin
(注意：在新版本的u-boot中，進行代碼重定位relocate之前就已經在board_init_f中調用了全局性的代碼，這些全局性的代碼并不是位置無關的，所以這里需要將u-boot直接下載到它的鏈接地址處，防止程序跑飛)
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T###########
done
Bytestransferred=153844(258f4hex)
EmbedSky>go0x32000000
（注意：必須與剛才tftp下載到的地址相同）
##Startingapplicationat0x32000000...¡ø
U-Boot2014.04(Jun282014-23:11:32)
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
DRAM:64MiB
WARNING:Cachesnotenabled
在tq2440.h中定義DEBUG宏
#defineDEBUG
EmbedSky>tftp0x32000000u-boot.bin;go0x32000000
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T############
done
Bytestransferred=168860(2939chex)
##Startingapplicationat0x32000000...¡ø
U-Boot2014.04(Jun292014-02:51:27)
U-Bootcode:32000000->320246BCBSS:->3202A0A4
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
monitorlen:0002A0A4
ramsize:04000000
TLBtablefrom33ff0000to33ff4000
TopofRAMusableforU-Bootat:33ff0000
Reserving168kforU-Bootat:33fc5000
Reserving4160kformalloc()at:33bb5000
Reserving32BytesforBoardInfoat:33bb4fe0
Reserving160BytesforGlobalDataat:33bb4f40
NewStackPointeris:33bb4f30
RAMConfiguration:
Bank#0:3000000064MiB
relocationOffsetis:01fc5000
WARNING:Cachesnotenabled
monitorflashlen:0002939C
NowrunninginRAM-U-Bootat:33fc5000
經過加打印，問題定位在board.c中的board_init_r在調用mem_malloc_init函數時出了問題，他完成的操作是將malloc_start標識的malloc區域清零，這里malloc區域的大小是4MB+160KB，發現在清除到2MB多的時候程序就掛了。
這個問題的原因好沒有找到，等待解決。目前臨時的解決辦法是將malloc區域的大小減小為2MB+160KB，做法是修改tq2440.h中，將
#defineCONFIG_SYS_MALLOC_LEN (4*1024*1024)
改為：
#defineCONFIG_SYS_MALLOC_LEN (2*1024*1024)
然后編譯運行，打印信息如下：
U-Bootcode:32000000->320246BCBSS:->3202A0A4
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
monitorlen:0002A0A4
ramsize:04000000
TLBtablefrom33ff0000to33ff4000
TopofRAMusableforU-Bootat:33ff0000
Reserving168kforU-Bootat:33fc5000
Reserving2112kformalloc()at:33db5000
Reserving32BytesforBoardInfoat:33db4fe0
Reserving160BytesforGlobalDataat:33db4f40
NewStackPointeris:33db4f30
RAMConfiguration:
Bank#0:3000000064MiB
relocationOffsetis:01fc5000
WARNING:Cachesnotenabled
monitorflashlen:0002939C
NowrunninginRAM-U-Bootat:33fc5000
Flash:fwcaddr00000000cmdf000f016bitx16bit
fwcaddr0000aaaacmdaa00aa16bitx16bit
fwcaddr00005554cmd55005516bitx16bit
fwcaddr0000aaaacmd90009016bitx16bit
fwcaddr00000000cmdf000f016bitx16bit
JEDECPROBE:ID1c22490
fwcaddr00000000cmdff00ff16bitx16bit
fwcaddr00000000cmd90009016bitx16bit
fwcaddr00000000cmdff00ff16bitx16bit
JEDECPROBE:ID16ea000
***failed***
###ERROR###PleaseRESETtheboard###
三、移植NORFLASH
第二步Flash:***failed***
###ERROR###PleaseRESETtheboard###
卡在這里不動了
搜索“Flash:”
pengdl@debian:~/work/tq2440/u-boot-2014.04$grep"Flash:"*-nR
......
arch/arm/lib/board.c:557:puts("Flash:");
.....
進入查看
puts("Flash:");
flash_size=flash_init();
if(flash_size>0){
#ifdefCONFIG_SYS_FLASH_CHECKSUM
print_size(flash_size,"");
/*
*ComputeandprintflashCRCifflashchecksumissetto'y'
*
*NOTE:MaybeweshouldaddsomeWATCHDOG_RESET()?XXX
*/
if(getenv_yesno("flashchecksum")==1){
printf("CRC:%08X",crc32(0,
(constunsignedchar*)CONFIG_SYS_FLASH_BASE,
flash_size));
}
putc('/n');
#else /*!CONFIG_SYS_FLASH_CHECKSUM*/
print_size(flash_size,"/n");
#endif/*CONFIG_SYS_FLASH_CHECKSUM*/
}else{
puts(failed);
hang();
}
failed在該文件中的定義如下
staticchar*failed="***failed***/n";
函數hang()在該文件中的定義如下
voidhang(void)
{
puts("###ERROR###PleaseRESETtheboard###/n");
for(;;);
}
說明是flash初始化失敗
進入drivers/mtd/cfi_flash.c：flash_init函數
if(!flash_detect_legacy(cfi_flash_bank_addr(i),i))
flash_detect_legacy函數去探測flash
進入flash_detect_legacy函數
flash_read_jedec_ids(info);
debug("JEDECPROBE:ID%x%x%x/n",
info->manufacturer_id,
info->device_id,
info->device_id2);
if(jedec_flash_match(info,info->start[0]))
break;
else
unmap_physmem((void*)info->start[0],MAP_NOCACHE);
jedec_flash_match函數將讀取到的flash信息與jedec_table進行匹配，如果匹配成功則填充flash_info，否則返回1，看來這里沒有匹配成功，在drivers/mtd/cfi_flash.c：flash_detect_legacy函數去探測開發板的flash，打開調試信息的宏，將探測到的flash信息打印出來
#defineDEBUG(也可以加載tq2440.h中)
重新編譯，開發板從NORFLASH啟動，
EmbedSky>tftp0x32000000u-boot.bin;go0x32000000
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T############
done
Bytestransferred=168860(2939chex)
##Startingapplicationat0x32000000...
U-Boot2014.04(Jun292014-02:57:57)
U-Bootcode:32000000->320246BCBSS:->3202A0A4
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
monitorlen:0002A0A4
ramsize:04000000
TLBtablefrom33ff0000to33ff4000
TopofRAMusableforU-Bootat:33ff0000
Reserving168kforU-Bootat:33fc5000
Reserving2112kformalloc()at:33db5000
Reserving32BytesforBoardInfoat:33db4fe0
Reserving160BytesforGlobalDataat:33db4f40
NewStackPointeris:33db4f30
RAMConfiguration:
Bank#0:3000000064MiB
relocationOffsetis:01fc5000
WARNING:Cachesnotenabled
monitorflashlen:0002939C
NowrunninginRAM-U-Bootat:33fc5000
Flash:fwcaddr00000000cmdf000f016bitx16bit
fwcaddr0000aaaacmdaa00aa16bitx16bit
fwcaddr00005554cmd55005516bitx16bit
fwcaddr0000aaaacmd90009016bitx16bit
fwcaddr00000000cmdf000f016bitx16bit
JEDECPROBE:ID1c22490
fwcaddr00000000cmdff00ff16bitx16bit
fwcaddr00000000cmd90009016bitx16bit
fwcaddr00000000cmdff00ff16bitx16bit
JEDECPROBE:ID16ea000
***failed***
###ERROR###PleaseRESETtheboard###
根據debug("JEDECPROBE:ID%x%x%x/n",
info->manufacturer_id,
info->device_id,
info->device_id2);
可以知道已經探測到開發板的flash的廠家ID為0x1c，設備ID為0x2249
在jedec_table表中增加TQ2440開發板的NORFLASH(EN29LV160AB)內容
#ifdefCONFIG_SYS_FLASH_LEGACY_1024Kx16
{/*TQ2440EN29LV160AB*/
.mfr_id=0x1c, /*manufacturer_id*/
.dev_id=0x2249,/*device_id*/
.name="EONEN29LV160AB",
.uaddr={/*因為NORFLASH的ADDR0接到了S3C2440的ADDR1*/
[1]=MTD_UADDR_0x0555_0x02AA/*x16*/
},
.DevSize=SIZE_2MiB,
.CmdSet=P_ID_AMD_STD,
.NumEraseRegions=4,
.regions={
ERASEINFO(0x04000,1),
ERASEINFO(0x02000,2),
ERASEINFO(0x08000,1),
ERASEINFO(0x10000,31),
}
},
#endif
注釋掉剛才打開的宏
drivers/mtd/cfi_flash.c
//#defineDEBUG
并在tq2440.h中定義CONFIG_SYS_FLASH_LEGACY_1024Kx16
//#defineCONFIG_SYS_FLASH_LEGACY_512Kx16
#defineCONFIG_SYS_FLASH_LEGACY_1024Kx16
重新編譯u-boot，從NORFLASH啟動開發板
EmbedSky>tftp0x32000000u-boot.bin;go0x32000000
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T###########
done
Bytestransferred=153568(257e0hex)
##Startingapplicationat0x32000000...¡ø
U-Boot2014.04(Jun292014-03:10:56)
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
DRAM:64MiB
WARNING:Cachesnotenabled
Flash:ERROR:toomanyflashsectors
2MiB
***Warning-badCRC,usingdefaultenvironment
In:serial
Out:serial
Err:serial
Net:Noethernetfound.
TQ2440#
出現一個錯誤toomanyflashsectors
搜索toomanyflashsectors
pengdl@debian:~/work/tq2440/u-boot-2014.04$grep"toomanyflashsectors"*-nR
./drivers/mtd/jedec_flash.c:444: printf("ERROR:toomanyflashsectors/n");
查看代碼
if(sect_cnt>=CONFIG_SYS_MAX_FLASH_SECT){
printf("ERROR:toomanyflashsectors/n");
break;
}
說明CONFIG_SYS_MAX_FLASH_SECT的值太小了，在配置文件tq2440.h修改該宏
#defineCONFIG_SYS_MAX_FLASH_SECT (35) //根據EN29LV160AB芯片手冊
重新編譯，從NORFLASH啟動開發板
EmbedSky>tftp0x32000000u-boot.bin;go0x32000000
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T###########
done
Bytestransferred=153568(257e0hex)
##Startingapplicationat0x32000000...¡ø
U-Boot2014.04(Jun292014-03:12:36)
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
DRAM:64MiB
WARNING:Cachesnotenabled
Flash:2MiB
***Warning-badCRC,usingdefaultenvironment
In:serial
Out:serial
Err:serial
Net:Noethernetfound.
TQ2440#
TQ2440#flinfo
Bank#1:EONEN29LV160ABflash(16x16)Size:2MBin35Sectors
AMDLegacycommandset,ManufacturerID:0x1C,DeviceID:0x2249
Erasetimeout:30000ms,writetimeout:100ms
SectorStartAddresses:
00000000RO00004000RO00006000RO00008000RO00010000RO
00020000RO00030000000400000005000000060000
00070000RO0008000000090000000A0000000B0000
000C0000000D0000000E0000000F000000100000
0011000000120000001300000014000000150000
00160000001700000018000000190000001A0000
001B0000001C0000001D0000001E0000001F0000
測試flash讀寫是否正常
讀取0x32000000地址的0x10字節數據到0x0地址，然后比較兩份數據是否相等
注意：從flinfo中可以看出0地址所在扇區是RO，要先解保護
TQ2440#protectoffall
Un-ProtectFlashBank#1
TQ2440#cp.b32000000010
CopytoFlash...done
TQ2440#cmp.b03200000010
Totalof16byte(s)werethesame
再來讀
TQ2440#md.b3200000010
32000000:130000ea14f09fe514f09fe514f09fe5................
TQ2440#md.b010
00000000:130000ea14f09fe514f09fe514f09fe5................
讀出的兩份數據一樣
至此NORFLASH移植完畢
四、移植網卡DM9000
網卡DM9000的驅動為drivers/net/dm9000x.c，我們需要將它編譯進u-boot，查看drivers/net/Makefile
38COBJS-$(CONFIG_DRIVER_DM9000)+=dm9000x.o
如果定義了CONFIG_DRIVER_DM9000就將dm9000x.o編譯進u-boot，在配置文件tq2440.h中定義該宏
#defineCONFIG_DRIVER_DM9000
在第一步已經經網卡CS8900的相關配置注釋掉了
重新編譯出錯
dm9000x.c:Infunction'dm9000_outblk_8bit':
dm9000x.c:156:error:'DM9000_DATA'undeclared(firstuseinthisfunction)
DM9000_DATA沒有定義，參考mini2440.h的配置如下
#defineCONFIG_DRIVER_DM9000
#defineCONFIG_DM9000_NO_SROM
（如果不設置這個宏，uboot會打印類似：
Warning:dm9000MACaddressesdon'tmatch:
AddressinSROMisff:ff:ff:ff:ff:ff
Addressinenvironmentis00:0c:29:2a:5c:a5
的信息）
#defineCONFIG_DM9000_BASE 0x20000000 //tq2440開發板的網卡dm9000接在S3C2440的bank4#defineDM9000_IO CONFIG_DM9000_BASE
#defineDM9000_DATA (CONFIG_DM9000_BASE+4) //tq2440開發板的網卡dm9000的cmd引腳接在S3C2440的ADDR2
打開之前第一步暫時注釋掉的宏
#defineCONFIG_CMD_PING
重新編譯，從NORFLASH啟動u-boot
EmbedSky>tftp0x32000000u-boot.bin;go0x32000000
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T###########
done
Bytestransferred=154592(25be0hex)
##Startingapplicationat0x32000000...¡ø
U-Boot2014.04(Jun292014-03:16:30)
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
DRAM:64MiB
WARNING:Cachesnotenabled
Flash:2MiB
***Warning-badCRC,usingdefaultenvironment
In:serial
Out:serial
Err:serial
Net:Noethernetfound.
TQ2440#
沒有找到網路
搜索Net：
pengdl@debian:~/work/tq2440/u-boot-2014.04$grep"Net:"*-nR
......
arch/arm/lib/board.c:662:puts("Net:");
......
查看單板文件board.c
puts("Net:");
eth_initialize(gd->bd);
進入net/eth.c:eth_initialize函數
if(board_eth_init(bis)<0)
進入board/tq2440/tq2440.c:board_eth_init函數
修改如下
intboard_eth_init(bd_t*bis)
{
intrc=0;
#ifdefCONFIG_CS8900
rc=cs8900_initialize(0,CONFIG_CS8900_BASE);
#endif
#ifdefCONFIG_DRIVER_DM9000
rc=dm9000_initialize(bis);
#endif
returnrc;
}
重新編譯，從NORFLASH啟動u-boot
EmbedSky>tftp0x32000000u-boot.bin;go0x32000000
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T###########
done
Bytestransferred=160268(2720chex)
##Startingapplicationat0x32000000...¡ø
U-Boot2014.04(Jun292014-03:20:16)
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
DRAM:64MiB
WARNING:Cachesnotenabled
Flash:2MiB
***Warning-badCRC,usingdefaultenvironment
In:serial
Out:serial
Err:serial
Net:dm9000
TQ2440#setethaddr00:12:34:56:ab:cd 設置mac地址
TQ2440#setipaddr192.168.1.6 設置開發板IP地址
TQ2440#setserverip192.168.1.8 設置tftp服務器IP地址
TQ2440#ping192.168.1.8 ping主機
dm9000i/o:0x20000000,id:0x90000a46
DM9000:runningin16bitmode
MAC:00:12:34:56:ab:cd
couldnotestablishlink
Usingdm9000device
host192.168.1.8isalive
TQ2440#tftpboot31000000u-boot.bin 下載文件
dm9000i/o:0x20000000,id:0x90000a46
DM9000:runningin16bitmode
MAC:00:12:34:56:ab:cd
couldnotestablishlink
Usingdm9000device
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x31000000
Loading:##############
1.8MiB/s
done
Bytestransferred=198364(306dchex)
注意到新版u-boot在用tftp下載時會打印出下載速度，另外上面出現了一個錯誤couldnotestablishlink
pengdl@debian:~/work/tq2440/u-boot-2014.04$grep"couldnotestablishlink"*-nR
./drivers/net/dm9000x.c:376: printf("couldnotestablishlink/n");
查看代碼并修改
#if0
i=0;
while(!(dm9000_phy_read(1)&0x20)){ /*autonegationcompletebit*/
udelay(1000);
i++;
if(i==10000){
printf("couldnotestablishlink/n");
return0;
}
}
#endif
重新編譯，從NORFLASH重啟開發板
EmbedSky>tftp0x32000000u-boot.bin;go0x32000000
dm9000i/o:0x20000300,id:0x90000a46
MAC:0a:1b:2c:3d:4e:5f
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x32000000
Loading:checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
checksumbad
T###########
done
Bytestransferred=160140(2718chex)
##Startingapplicationat0x32000000...¡ø
U-Boot2014.04(Jun292014-03:25:30)
CPUID:32440001
FCLK:400MHz
HCLK:100MHz
PCLK:50MHz
DRAM:64MiB
WARNING:Cachesnotenabled
Flash:2MiB
***Warning-badCRC,usingdefaultenvironment
In:serial
Out:serial
Err:serial
Net:dm9000
現在重新下載剛才的u-boot.bin
TQ2440#tftp0x30000000u-boot.bin
dm9000i/o:0x20000000,id:0x90000a46
DM9000:runningin16bitmode
MAC:ff:ff:ff:ff:ff:ff
WARNING:BadMACaddress(uninitializedEEPROM?)
Operatingat100Mfullduplexmode
Usingdm9000device
TFTPfromserver192.168.1.8;ourIPaddressis192.168.1.6
Filename'u-boot.bin'.
Loadaddress:0x30000000
Loading:T###########
30.3KiB/s
done
Bytestransferred=160140(2718chex)
剛才的錯誤解決了
至此網卡DM9000移植完畢
五、支持NANDFLASH讀寫
修改配置文件include/configs/tq2440.h打開之前注釋掉的NAND相關的宏
#defineCONFIG_CMD_NAND
編譯出錯
s3c2410_nand.c:Infunction's3c2410_hwcontrol':
s3c2410_nand.c:57:warning:implicitdeclarationoffunction's3c2410_get_base_nand'
s3c2410_nand.c:57:warning:initializationmakespointerfromintegerwithoutacast
s3c2410_nand.c:72:error:dereferencingpointertoincompletetype
s3c2410_nand.c:72:error:dereferencingpointertoincompletetype
s3c2410_nand.c:75:error:dereferencingpointertoincompletetype
s3c2410_nand.c:75:error:dereferencingpointertoincompletetype
查看代碼
structs3c2410_nand*nand=s3c2410_get_base_nand();
structs3c2410_nand的定義
#ifdefCONFIG_S3C2410
/*NANDFLASH(seeS3C24
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