fl2440 --------添加网卡驱动

（仅仅是添加网卡，相关的内容，不做说明）

1.修改内核代码：

vim arch/arm/mach-s3c2440/mach-smdk2440.c
#include<linux/dm9000.h>                   //添加网卡头文件

添加如下代码：

/*Add DM9000 ethernet drivers*/
#define DM9000_BASE    (S3C2410_CS4 + 0x300)
static struct resource s3c_dm9000_resource[] = {
     [0] = {
        .start = DM9000_BASE,
        .end   = DM9000_BASE + 3,
        .flags = IORESOURCE_MEM
    },
    [1] = {
        .start = DM9000_BASE + 4,
        .end   = DM9000_BASE + 7,
        .flags = IORESOURCE_MEM
    },
    [2] = {
        .start = IRQ_EINT7,
        .end   = IRQ_EINT7,
        .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
    }
};

/*        
 * The DM9000 has no eeprom, and it's MAC address is set by
 * the bootloader before starting the kernel.
 */
static struct dm9000_plat_data s3c_dm9000_pdata = {
    .flags      = (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),
};
static struct platform_device s3c_device_dm9000 = {
    .name       = "dm9000",
    .id     = -1,
    .num_resources  = ARRAY_SIZE(s3c_dm9000_resource),
    .resource   = s3c_dm9000_resource,
    .dev        = {
        .platform_data  = &s3c_dm9000_pdata,
    },
};

2、在platform_device *smdk2440_devices[] __initdata结构体添加启动DM9000

static struct platform_device *smdk2440_devices[] __initdata = {
    &s3c_device_ohci,
    &s3c_device_lcd,
    &s3c_device_wdt,
    &s3c_device_i2c0,
    &s3c_device_iis,
    &s3c_device_dm9000,
};

3.在头文件dm9000.h中添加头文件

vi include/linux/dm9000.h
#include <linux/io.h>

重新编译后就可以使能网卡了。
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