mini2440 dm9000网卡驱动移植
内核版本：linux-2.6.32.2 实验平台：mini2440
1. 添加平台设备支持
首先需要在mach-mini2440.c中包含头文件<linux/dm9000.h>，dm9000平台设备定义如下：
/* DM9000AEP 10/100 ethernet controller */
#define MACH_MINI2440_DM9000_BASE (S3C2410_CS4 + 0x300)
static struct resource mini2440_dm9000_resource[] = {
[0] = {
.start = MACH_MINI2440_DM9000_BASE,
.end = MACH_MINI2440_DM9000_BASE + 3,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = MACH_MINI2440_DM9000_BASE + 4,
.end = MACH_MINI2440_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 mini2440_dm9000_platdata = {
.flags = (DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM),
};
static struct platform_device mini2440_device_eth = {
.name = "dm9000",
.id = -1,
.num_resources = ARRAY_SIZE(mini2440_dm9000_resource),
.resource = mini2440_dm9000_resource,
.dev = {
.platform_data = &mini2440_dm9000_platdata,
},
};最后需要将dm9000这个平台设备添加到mini2440_devices这个平台设备数组里面，这样才能完成平台设备的注册。
static struct platform_device *mini2440_devices[] __initdata = {
/* ... */
&mini2440_device_eth,
};
2. dm9000驱动修改
drivers/net/dm9000.c这个驱动并不是为mini2440做准备的，需要做一些修改。
包含相关头文件：
#if defined(CONFIG_ARCH_S3C2410) #include <mach/regs-mem.h> #endif修改dm9000片选总线时序：
static int __init
dm9000_init(void)
{
#if defined(CONFIG_ARCH_S3C2410)
unsigned int oldval_bwscon = *(volatile unsigned int *)S3C2410_BWSCON;
unsigned int oldval_bankcon4 = *(volatile unsigned int *)S3C2410_BANKCON4;
*((volatile unsigned int *)S3C2410_BWSCON) =
(oldval_bwscon & ~(3<<16)) | S3C2410_BWSCON_DW4_16 | S3C2410_BWSCON_WS4 | S3C2410_BWSCON_ST4;
*((volatile unsigned int *)S3C2410_BANKCON4) = 0x1f7c;
#endif
/* ... */
}
在dm9000_probe函数中还需要给dm9000设置一个mac地址。
static int __devinit
dm9000_probe(struct platform_device *pdev)
{
/* ... */
memcpy(ndev->dev_addr, "\x08\x90\x90\x90\x90\x90", 6);
if (!is_valid_ether_addr(ndev->dev_addr))
dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "
"set using ifconfig\n", ndev->name);
/* ... */
}
Device Drivers ---> [*] Network device support ---> [*] Ethernet (10 or 100Mbit) ---> <*> DM9000 support (4) DM9000 maximum debug level
4. 启动网络设备
内核配置好之后，需要手动启动网络设备，使用如下命令：
ifconfig eth0 192.168.1.109 netmask 255.255.255.0 up
或者将上面的命令写入到启动脚本中，还可以使用ifconfig命令来停止网络设备：
ifconfig eth0 down
输入ifconfig命令得到如下结果：
eth0 Link encap:Ethernet HWaddr 08:90:90:90:90:90 inet addr:192.168.1.109 Bcast:192.168.1.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:21 errors:0 dropped:0 overruns:0 frame:0 TX packets:4 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2455 (2.3 KiB) TX bytes:280 (280.0 B) Interrupt:51 Base address:0x8300