TQ2440 u-boot-2012.04.01移植六完善u-boot

经过上面的移植u-boot基本上能用了，但仍有很多要完善的地方，继续修改使u-boot更好用

开发环境：
系统：ubuntu 10.04.4
单板：tq2440
NAND FLASH：K9F1216U0A 256MB
NOR Flash：EN29LV160AB 2MB
SDRAM：HY57V561620 x2 64MB
NET：DM9000AEP
编译器：arm-linux-gcc-4.3.2

搭建开发环境详见ubuntu 10.04.4开发环境配置。
目标：
1.支持NOR Flash启动，串口正常输出
2.支持NAND启动
3.支持DM9000网卡
4.裁剪u-boot及制作补丁

1.环境变量存放修改

change@change:~$ cd Si/TQ2440/u-boot-2012.04.01/
change@change:~/Si/TQ2440/u-boot-2012.04.01$ grep "default environment" * -nR

common/env_common.c:175:                                "using default environment\n\n",

找到默认环境变量common/env_common.c:43:再根据它再配置文件TQ2440.h设置

#define CONFIG_BOOTARGS "console=ttySAC0 root=/dev/mtdblock3"
#define CONFIG_BOOTCOMMAND "nand read 30000000 kernel;bootm 30000000 "      //设置bootcmd就会有倒数计时

#define CONFIG_NETMASK 255.255.255.0
#define CONFIG_IPADDR 172.16.1.111
#define CONFIG_SERVERIP       172.16.1.132
#define CONFIG_ETHADDR 00:0c:29:4d:e4:f4

修改分区TQ2440.h

#if 0
#define CONFIG_ENV_ADDR (CONFIG_SYS_FLASH_BASE + 0x070000)
#define CONFIG_ENV_IS_IN_FLASH
#define CONFIG_ENV_SIZE 0x10000
/* allow to overwrite serial and ethaddr */
#define CONFIG_ENV_OVERWRITE
#endif
#define CONFIG_ENV_IS_IN_NAND
#define CONFIG_ENV_OFFSET 0x00040000
#define CONFIG_ENV_SIZE 0x20000
#define CONFIG_ENV_RANGE CONFIG_ENV_SIZE

2.裁剪u-boot

同样修改配置文件TQ2440.h

/************************************************************
 * USB support (currently only works with D-cache off)
 ************************************************************/
//#define CONFIG_USB_OHCI
//#define CONFIG_USB_KEYBOARD
//#define CONFIG_USB_STORAGE
//#define CONFIG_DOS_PARTITION

//#define CONFIG_RTC_S3C24X0

/*
 * BOOTP options
 */
//#define CONFIG_BOOTP_BOOTFILESIZE
//#define CONFIG_BOOTP_BOOTPATH
//#define CONFIG_BOOTP_GATEWAY
//#define CONFIG_BOOTP_HOSTNAME

#define CONFIG_CMD_BSP
#define CONFIG_CMD_CACHE
//#define CONFIG_CMD_DATE
//#define CONFIG_CMD_DHCP
#define CONFIG_CMD_ELF
#define CONFIG_CMD_NAND
#define CONFIG_CMD_PING
#define CONFIG_CMD_REGINFO
//#define CONFIG_CMD_USB

/*
 * File system
 */
//#define CONFIG_CMD_FAT
//#define CONFIG_CMD_EXT2
//#define CONFIG_CMD_UBI
//#define CONFIG_CMD_UBIFS
//#define CONFIG_CMD_MTDPARTS
//#define CONFIG_MTD_DEVICE
//#define CONFIG_MTD_PARTITIONS
//#define CONFIG_YAFFS2
//#define CONFIG_RBTREE

3.定义宏支持mtdpart

在配置文件TQ2440.h增加

#define CONFIG_CMD_MTDPARTS
#define CONFIG_MTD_DEVICE
#define MTDIDS_DEFAULT "nand0=TQ2440-0"
#define MTDPARTS_DEFAULT "mtdparts=TQ2440-0:256k(u-boot),"\
"128k(params),"\
"2M(kernel)," \
"-(rootfs)"

在arch/arm/lib/board.c增加mtdpart_init初始化函数

run_command("mtdparts default", 0);//***add
//mtdparts_init();//***add
/* main_loop() can return to retry autoboot, if so just run it again. */
for (;;) {
main_loop();
}

编译、烧写、测试

change@change:~/Si/TQ2440/u-boot-2012.04.01$ make distclean 
change@change:~/Si/TQ2440/u-boot-2012.04.01$ make TQ2440_config 
Configuring for TQ2440 board...
change@change:~/Si/TQ2440/u-boot-2012.04.01$ make

编译成功，看看经过裁剪的u-boot大小

change@change:~/Si/TQ2440/u-boot-2012.04.01$ ls u-boot.bin -l
-rwxr-xr-x 1 change change 216852 2013-05-03 20:05 u-boot.bin
change@change:~/Si/TQ2440/u-boot-2012.04.01$ cp u-boot.bin /home/change/work/tftpboot/

现在直接用移植的u-boot烧写新的u-boot,单板拨到NAND启动

U-Boot 2012.04.01 (May 03 2013 - 17:33:12)


CPUID: 32440001
FCLK:      400 MHz
HCLK:      100 MHz
PCLK:       50 MHz
DRAM:  64 MiB
WARNING: Caches not enabled
Flash: 2 MiB
NAND:  256 MiB
*** Warning - bad CRC, using default environment


In:    serial
Out:   serial
Err:   serial
Net:   dm9000
TQ2440 # set ipaddr 172.16.1.111
TQ2440 # set gatewayip 172.16.1.1
TQ2440 # set serverip 172.16.1.132
TQ2440 # tftp 0x32000000 u-boot.bin
dm9000 i/o: 0x20000000, id: 0x90000a46 
DM9000: running in 16 bit mode
MAC: 00:00:00:00:00:00
could not establish link
*** ERROR: `ethaddr' not set
dm9000 i/o: 0x20000000, id: 0x90000a46 
DM9000: running in 16 bit mode
MAC: 00:00:00:00:00:00
could not establish link
TQ2440 # set ethaddr 00:0c:29:4d:e4:f4
TQ2440 #tftp 0x32000000 u-boot.bin    
dm9000 i/o: 0x20000000, id: 0x90000a46 
DM9000: running in 16 bit mode
MAC: 00:00:0c:29:4d:e4
could not establish link
Using dm9000 device
TFTP from server 172.16.1.132; our IP address is 172.16.1.111
Filename 'u-boot.bin'.
Load address: 0x32000000
Loading: ###############
done
Bytes transferred = 216852 (34f14 hex)
TQ2440 # nand erase 0 0x80000


NAND erase: device 0 offset 0x0, size 0x80000
Erasing at 0x60000 -- 100% complete.
OK
TQ2440 # nand write 0x32000000 0 0x40000


NAND write: device 0 offset 0x0, size 0x40000
 262144 bytes written: OK
TQ2440 # 

烧写成功，现在重启，仍是NAND启动，串口115200 8 n 1

 U-Boot 2012.04.01 (May 03 2013 - 20:04:26)


CPUID: 32440001
FCLK:      400 MHz
HCLK:      100 MHz
PCLK:       50 MHz
DRAM:  64 MiB
WARNING: Caches not enabled
Flash: 2 MiB
NAND:  256 MiB
*** Warning - bad CRC, using default environment


In:    serial
Out:   serial
Err:   serial
Net:   dm9000
Hit any key to stop autoboot:  0 
TQ2440 # m<INTERRUPT>
TQ2440 # mtdpart


device nand0 <TQ2440-0>, # parts = 4
 #: name                size            offset          mask_flags
 0: u-boot              0x00040000      0x00000000      0
 1: params              0x00020000      0x00040000      0
 2: kernel              0x00200000      0x00060000      0
 3: rootfs              0x0fda0000      0x00260000      0


active partition: nand0,0 - (u-boot) 0x00040000 @ 0x00000000


defaults:
mtdids  : nand0=TQ2440-0
mtdparts: mtdparts=TQ2440-0:256k(u-boot),128k(params),2M(kernel),-(rootfs)
TQ2440 # ping 172.16.1.132
dm9000 i/o: 0x20000000, id: 0x90000a46 
DM9000: running in 16 bit mode
MAC: 00:0c:29:4d:e4:f4
could not establish link
Using dm9000 device
host 172.16.1.132 is alive
TQ2440 # save
Saving Environment to NAND...
Erasing Nand...
Erasing at 0x40000 -- 100% complete.
Writing to Nand... done
TQ2440 # 

移植的u-boot基本正常，暂时还没发现其它问题，可以跑了。还有micro2440单板与TQ2440移植过程类似，参考这个移植就行。