原文地址：http://liu1227787871.blog.163.com/blog/static/205363197201272611483434/
一、参考mach-mini2440.c文件，在mach-smdk2440.c文件里面添加如下内容：
#define MACH_SMDK2440_DM9K_BASE (S3C2410_CS4 + 0x300)
static struct resource smdk2440_dm9k_resource[] = {
[0] = {
.start = MACH_SMDK2440_DM9K_BASE,
.end = MACH_SMDK2440_DM9K_BASE + 3,
.flags = IORESOURCE_MEM
},
[1] = {
.start = MACH_SMDK2440_DM9K_BASE + 4,
.end = MACH_SMDK2440_DM9K_BASE + 7,
.flags = IORESOURCE_MEM
},
[2] = {
.start = IRQ_EINT7,
.end = IRQ_EINT7,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
}
};
static struct dm9000_plat_data smdk2440_dm9k_pdata = {
.flags = (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),
};
static struct platform_device smdk2440_device_eth = {
.name = "dm9000",
.id = -1,
.num_resources = ARRAY_SIZE(smdk2440_dm9k_resource),
.resource = smdk2440_dm9k_resource,
.dev = {
.platform_data = &smdk2440_dm9k_pdata,
},
};
二、在mach-smdk2440.c文件的smdk2440_devices里添加：&smdk2440_device_eth,
static struct platform_device *smdk2440_devices[] __initdata = {
&s3c_device_ohci,
&s3c_device_lcd,
&s3c_device_wdt,
&s3c_device_i2c0,
&s3c_device_iis,
&smdk2440_device_eth, //新加
};
三、在mach-smdk2440.c文件里添加头文件：#include
四、实验：
用新内核启动开发板
ping 192.168.183.128 ：可以ping通
mount -t nfs -o nolock,vers=2 192.168.183.128:/home/share /mnt ：也是成功的！
五、优化
如果想使用较新版本的dm9000.c文件，我们需要修改厂家提供的dm9000.c文件，之前我们在dm9000驱动的时候曾经将厂家提供的网卡驱动修改好了，包括Makefile、dm9dev9000c.c两个文件。先见Makefile文件的内核目录改成：dm9dev9000c.c。之后编译！
我们的任务就是修改错误！
302行：添加头文件：#include
358行：注释掉： SET_MODULE_OWNER(dev);
409、410行：注释掉，并替换为：db = netdev_priv(dev);
memset(db, 0, sizeof(struct board_info));
并将所有的：board_info_t *db = (board_info_t *)dev->priv;
替换为：
board_info_t *db = netdev_priv(dev) ;
将所有的：db = (board_info_t *)dev->priv;
替换为：db = netdev_priv(dev);
重新编译，并修改错误：
426行：在419行左右添加：dev->netdev_ops = &dm9k_netdev_ops;
并在dm9dev9000c.c文件里面添加如下代码：
static const struct net_device_ops dm9k_netdev_ops = {
.ndo_open = dmfe_open,
.ndo_stop = dmfe_stop,
.ndo_start_xmit = dmfe_start_xmit,
.ndo_tx_timeout = dmfe_timeout,
.ndo_set_rx_mode = dm9000_hash_table,
.ndo_do_ioctl = dmfe_do_ioctl,
.ndo_get_stats = &dmfe_get_stats,
.ndo_change_mtu = eth_change_mtu,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = dm9000_poll_controller,
#endif
};
并将下列代码注释掉：
dev->open = &dmfe_open;
dev->hard_start_xmit = &dmfe_start_xmit;
dev->tx_timeout = dmfe_timeout;
dev->stop = &dmfe_stop;
dev->set_multicast_list = &dm9000_hash_table;
dev->do_ioctl = &dmfe_do_ioctl;
dev->get_stats = &dmfe_get_stats;
重新编译，并修改错误：
1400行：将dm9000_hash_table函数替换成如下代码：
static void
dm9000_hash_table_unlocked(struct net_device *dev)
{
board_info_t *db = netdev_priv(dev);
struct netdev_hw_addr *ha;
int i, oft;
u32 hash_val;
u16 hash_table[4];
u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
dm9000_dbg(db, 1, "entering %s\n", __func__);
for (i = 0, oft = DM9000_PAR; i < 6; i++, oft++)
iow(db, oft, dev->dev_addr[i]);
/* Clear Hash Table */
for (i = 0; i < 4; i++)
hash_table[i] = 0x0;
/* broadcast address */
hash_table[3] = 0x8000;
if (dev->flags & IFF_PROMISC)
rcr |= RCR_PRMSC;
if (dev->flags & IFF_ALLMULTI)
rcr |= RCR_ALL;
/* the multicast address in Hash Table : 64 bits */
netdev_for_each_mc_addr(ha, dev) {
hash_val = ether_crc_le(6, ha->addr) & 0x3f;
hash_table[hash_val / 16] |= (u16) 1 << (hash_val % 16);
}
/* Write the hash table to MAC MD table */
for (i = 0, oft = DM9000_MAR; i < 4; i++) {
iow(db, oft++, hash_table[i]);
iow(db, oft++, hash_table[i] >> 8);
}
iow(db, DM9000_RCR, rcr);
}
static void
dm9000_hash_table(struct net_device *dev)
{
board_info_t *db = netdev_priv(dev);
unsigned long flags;
spin_lock_irqsave(&db->lock, flags);
dm9000_hash_table_unlocked(dev);
spin_unlock_irqrestore(&db->lock, flags);
}
重新编译：
1405行：缺少头文件dm9000.h，我们可以将内核自带的dm9000.h拷贝过来，并在：dm9dev9000c.c文件里添加头文件：#include “dm9000.h”
重新编译：
1408行：将下列代码注释掉：
.get_rx_csum = dmfe_get_rx_csum,
.set_rx_csum = dmfe_set_rx_csum,
.get_tx_csum = dmfe_get_tx_csum,
.set_tx_csum = dmfe_set_tx_csum,
error: implicit declaration of function 'dm9000_dbg'
没有错误了，我们需要将dm9dev9000c.c编译进内核，方法如下：
1、cp dm9dev9000c.c /home/share/jz2440/source/kernel/linux-3.4.2/drivers/net/ethernet/davicom/
2、cd /home/share/jz2440/source/kernel/linux-3.4.2/drivers/net/ethernet/davicom/
vi Makefile
将：obj-$(CONFIG_DM9000) += dm9000.o
修改为：obj-$(CONFIG_DM9000) += dm9dev9000c.o
cd /home/share/jz2440/source/kernel/linux-3.4.2
make uImage
使用新内核：
nfs 30000000 192.168.183.128:/home/share/jz2440/source/kernel/linux-3.4.2/arch/arm/boot/uImage
bootm 30000000
ping 192.168.183.128 ：可以ping通
mount -t nfs -o nolock,vers=2 192.168.183.128:/home/share /mnt ：也是成功的！
六、使用nfs文件系统
set bootargs console=ttySAC0,115200 root=/dev/nfs nfsroot=192.168.183.128:/home/share/jz2440/source/other/fs_mini_mdev_new ip=192.168.183.127:192.168.183.128:192.168.183.225:225.225.225.0::eth0:off
nfs 30000000 192.168.183.128:/home/share/jz2440/source/kernel/linux-3.4.2/arch/arm/boot/uImage
bootm 30000000
成功！！！
最后我们可以将：
*bankcon4 = (1<<8)|(1<<6);
//*bankcon4 = (7<<8)|(1<<6);
改为：
//*bankcon4 = (1<<8)|(1<<6);
*bankcon4 = (7<<8)|(1<<6);
速度会快一点点！
七、制作补丁
cd linux-3.4.2
cp .config config.ko
make distclean
cd ..
mv linux-3.4.2 linux-3.4.2_lht
tar xvf linux-3.4.2.tar.bz2
diff -urN linux-3.4.2 linux-3.4.2_lht > linux-3.4.2_lht.patch
八、使用补丁
cd linux-3.4.2
patch -p1 < ../linux-3.4.2_lht.patch
cp ../config.ok .
cp config.ok .config
make uImage
