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

时间：2021-12-23 09:16:15

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_MDIV	0xC3
#define M_PDIV	0x4
#define M_SDIV	0x1
#elif FCLK_SPEED==1		

#if defined(CONFIG_S3C2410)     /* Fout = 202.8MHz */
#define M_MDIV	0xA1
#define M_PDIV	0x3
#define M_SDIV	0x1
#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_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
#define U_M_SDIV	0x2
#endif

#if defined(CONFIG_S3C2440)/*见S3C2440数据手册P227*/
#define U_M_MDIV	0x38
#define U_M_PDIV	0x2
#define U_M_SDIV	0x2
#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_NET
int board_eth_init(bd_t *bis)
{
	int rc = 0;
#ifdef CONFIG_CS8900
	rc = cs8900_initialize(0, CONFIG_CS8900_BASE);
#endif

#ifdef CONFIG_DRIVER_DM9000
	rc = dm9000_initialize(bis);
#endif
	return 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_BASE	0x19000300
#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_ETHADDR	08:00:3e:26:0a:5b */
#define CONFIG_NETMASK          255.255.255.0
#define CONFIG_IPADDR		10.0.0.110
#define CONFIG_SERVERIP		10.0.0.1

修改为：

#define CONFIG_ETHADDR	08:00:3e:26:0a:5b 
#define CONFIG_NETMASK          255.255.255.0
#define CONFIG_IPADDR		192.168.1.4
#define CONFIG_SERVERIP		192.168.1.1

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
}
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