fl2440的U-boot-2010.09移植（三）DM9000网卡及开发板相关配置

一、在board/fl2440/fl2440.c 中对GPIO和PLL的配置进行修改
（1）修改GPIO和PLL的配置（36行附近）为：

#if FCLK_SPEED==0/* Fout = 203MHz, Fin = 12MHz for Audio */#define M_MDIV0xC3#define M_PDIV0x4#define M_SDIV0x1#elif FCLK_SPEED==1#if defined(CONFIG_S3C2410)     /* Fout = 202.8MHz */#define M_MDIV0xA1#define M_PDIV0x3#define M_SDIV0x1#endif#if defined(CONFIG_S3C2440)     /* Fout = 405MHZ */#define M_MDIV 0x7f#define M_PDIV 0x2#define M_SDIV 0x1#endif#endif#define USB_CLOCK 1#if USB_CLOCK==0#define U_M_MDIV0xA1#define U_M_PDIV0x3#define U_M_SDIV0x1#elif USB_CLOCK==1#if defined(CONFIG_S3C2410)#define U_M_MDIV0x48#define U_M_PDIV0x3#define U_M_SDIV0x2#endif#if defined(CONFIG_S3C2440)/*见S3C2440数据手册P227*/#define U_M_MDIV0x38#define U_M_PDIV0x2#define U_M_SDIV0x2#endif#endif

（2）修改board_init函数中的LED和蜂鸣器的GPIO寄存器配置：

#if defined(CONFIG_S3C2440)       gpio->GPBCON = 0x001dd7fc;//初始化相应的GPB 口为输出口,为显示LED作准备,之前忘了改导致灯不亮#else        gpio->GPBCON = 0x00044555;#endif  ……          gpio->GPCCON =  0xAAAA56A9;        gpio->GPCUP = 0xFFFFFFFF;……         gpio->GPDUP = 0xFFFFFFFF;

 （3）为引导linux 内核，修改开发板的类型代码

#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 fl2440-Board */ gd->bd->bi_arch_number = MACH_TYPE_S3C2440;#endif

（4）为使int board_init (void)设置完成后，为了测试Uboot第二阶段工作完成，我加入了LED灯亮起显示，在int board_init (void)的最后添加：

        icache_enable();        dcache_enable();#if defined(CONFIG_FL2440)        gpio->GPBDAT = ((1<<5) | (1<<6) | (1<<8) | (1<<10));//使LED全部熄灭        gpio->GPBDAT &= 0xffe;  /*添加关闭蜂鸣器语句*/        gpio->GPBDAT = ~(3<<5);        #endif        return 0;

二、添加DM9000网卡的支持

（5）在board/fl2440/fl2440.c 中board_eth_init函数添加对dm9000的支持

#ifdef CONFIG_CMD_NETint board_eth_init(bd_t *bis){int rc = 0;#ifdef CONFIG_CS8900rc = cs8900_initialize(0, CONFIG_CS8900_BASE);#endif#ifdef CONFIG_DRIVER_DM9000rc = dm9000_initialize(bis);#endifreturn rc;}#endif

（6）然后修改include/configs/fl2440.h文件中关于网卡的宏定义，将原来的：

#define CONFIG_NET_MULTI#define CONFIG_CS8900/* we have a CS8900 on-board */#define CONFIG_CS8900_BASE0x19000300#define CONFIG_CS8900_BUS16/* the Linux driver does accesses as shorts */

修改为：

#define CONFIG_NET_MULTI                 1#define CONFIG_DRIVER_DM9000             1#define CONFIG_DM9000_USE_16BIT          1#define CONFIG_DM9000_BASE               0x20000300#define DM9000_IO                        CONFIG_DM9000_BASE#define DM9000_DATA                      (CONFIG_DM9000_BASE + 4)#define CONFIG_DM9000_NO_SROM            1 //防止dm9000去从srom中读取物理地址信息

并在98行附近添加

#define CONFIG_CMD_DHCP#define CONFIG_CMD_PING   /*****add by yanghao*****/#define CONFIG_CMD_NET    /*add by yanghao*/

并将104行附近

/*#define CONFIG_ETHADDR08:00:3e:26:0a:5b */#define CONFIG_NETMASK          255.255.255.0#define CONFIG_IPADDR10.0.0.110#define CONFIG_SERVERIP10.0.0.1

修改为：

#define CONFIG_ETHADDR08:00:3e:26:0a:5b #define CONFIG_NETMASK          255.255.255.0#define CONFIG_IPADDR192.168.1.4#define CONFIG_SERVERIP192.168.1.1

这里是修改开发板的IP地址和主机地址，需要将主机地址修改成“192.168.1.1”

 （7）打开driver/net/dm9000x.c文件，修改函数dm9000_halt，防止uboot在ping通主机后又马上断开连接的问题

static void dm9000_halt(struct eth_device *netdev){DM9000_DBG("%s\n", __func__);#if 0    //为了防止dm9000建立连接后又马上断开的情况/* RESET devie */phy_write(0, 0x8000);/* PHY RESET */DM9000_iow(DM9000_GPR, 0x01);/* Power-Down PHY */DM9000_iow(DM9000_IMR, 0x80);/* Disable all interrupt */DM9000_iow(DM9000_RCR, 0x00);/* Disable RX */#endif}