u-boot 2013.04-rc1移植（7）

DM9000网卡移植

u-boot默认的网卡是CS8900，而DM9000拥有高性价比，在嵌入式领域广泛被采用。uboot对DM9000支持的已经很完善，稍作修改，就可以使用。

1、修改：/home/eric/Documents/u-boot-2013.04-rc1/include/configs/smdk6410.h，屏蔽CS8900相关定义，增加DM9000支持

/* * Hardware drivers */#if 0       //eric++ 2017-11-12#define CONFIG_CS8900           /* we have a CS8900 on-board    */#define CONFIG_CS8900_BASE      0x18800300#define CONFIG_CS8900_BUS16     /* follow the Linux driver  */#endif#define CONFIG_DM9000           /* we have a DM9000 on-board    */#define CONFIG_DM9000_BASE      0x18800300#define CONFIG_DM9000_USE_16BIT     /* follow the Linux driver  */#define CONFIG_DM9000_NO_SROM       1#define CONFIG_DRIVER_DM9000    1#define DM9000_IO       CONFIG_DM9000_BASE#define DM9000_DATA     (CONFIG_DM9000_BASE+4)#define CONFIG_ETHADDR      00.20.40.80.0a.0b#define CONFIG_NET_MASK     255.255.255.0#define CONFIG_IPADDR       192.168.1.2#define CONFIG_SERVERIP     192.168.1.136#define CONFIG_GATEWAYIP    192.168.1.1

注意：其中服务器IP要为电脑的IP，因为稍后会用电脑模拟服务器，而本机IP要和服务器IP位于同一网段。这样才可以在局域网内进行通讯。

2、修改：/home/eric/Documents/u-boot-2013.04-rc1/board/samsung/smdk6410/smdk6410.c

int board_eth_init(bd_t *bis){    int rc = 0;#ifdef CONFIG_CS8900    rc = cs8900_initialize(0, CONFIG_CS8900_BASE);#endif#ifdef CONFIG_DM9000    //eric++ 2017-11-12    rc = dm9000_initialize( bis );#endif    return rc;}

3、编译启动！

U-Boot 2013.04-rc1 (Nov 12 2017 - 13:45:23) for SMDK6410

CPU:     S3C6410@533MHz         Fclk = 533MHz, Hclk = 133MHz, Pclk = 66MHz (ASYNC Mode) Board:   SMDK6410DRAM:  128 MiBWARNING: Caches not enabledFlash: *** failed ***NAND:  256 MiBMMC:   Samsung  Host Controller: 0,3.6 GiB*** Warning - bad CRC, using default environmentIn:    serialOut:   serialErr:   serialNet:   dm9000Hit any key to stop autoboot:  0 NAND read: device 0 offset 0x60000, size 0x1c0000 1835008 bytes read: OKWrong Image Format for bootm commandERROR: can't get kernel image!

网卡已成功切换成DM9000

4、设备接上网线，连接路由，保证和电脑在同一局域网内，用ping命令测试，是否连通：

SMDK6410 # ping 192.168.1.136dm9000 i/o: 0x18800300, id: 0x90000a46 DM9000: running in 16 bit modeMAC: 00:40:5c:26:0a:5boperating at 100M full duplex modeUsing dm9000 devicehost 192.168.1.136 is aliveSMDK6410 #  

如果网络配置不对,或者网络没有连接好，则会ping failed；

SMDK6410 # ping 192.168.1.136dm9000 i/o: 0x18800300, id: 0x90000a46 DM9000: running in 16 bit modeMAC: 00:40:5c:26:0a:5bcould not establish linkUsing dm9000 deviceping failed; host 192.168.1.136 is not aliveSMDK6410 # 

6、利用tftp进行下载u-boot到nand flash中，Linux配置tftp服务器，或者window开启tftp32；
原理：从tftp服务器下载u-boot-nand.bin到RAM中，再烧写nand flash。

开启windows中tftp32，模拟一个tftp服务器，Current Directory中放入u-boot-nand.bin文件。

执行如下命令：

SMDK6410 # tftp 50008000 u-boot-nand.bindm9000 i/o: 0x18800300, id: 0x90000a46DM9000: running in 16 bit modeMAC: 00:40:5c:26:0a:5boperating at 100M full duplex modeUsing dm9000 deviceTFTP from server 192.168.1.136; our IP address is 192.168.1.2Filename 'u-boot-nand.bin'.Load address: 0x50008000Loading: ####################         444.3 KiB/sdoneBytes transferred = 280712 (44888 hex)SMDK6410 #SMDK6410 # nand erase.chipNAND erase.chip: device 0 whole chipSkipping bad block at  0x02960000Skipping bad block at  0x06860000Skipping bad block at  0x07220000Skipping bad block at  0x08d00000Skipping bad block at  0x0df60000Skipping bad block at  0x0fc40000Erasing at 0xffe0000 -- 100% complete.OKSMDK6410 # nand write.uboot 50008000 0 0NAND write: device 0 offset 0x0, size 0x0 516096 bytes written: OKSMDK6410 #

经过以上三个命令顺利将服务器中的u-boot-nand.bin烧录至nand flash中。和用SD卡进行烧写nand相比，方便很多！