DM9000网卡驱动的移植

DM9000网卡驱动的移植

修改arch/arm/mach-s3c2440/mach-smdk2440.c 160行

Platform_device结构体中，加入：

&s3c_device_dm9000,

修改arch/arm/plat-s3c24xx/devs.c 在最前面38行加入：

#include //别忘加这个头文件

/*DM9000*/

static struct resource s3c_dm9000_resource[] = {

[0] = {

.start = S3C2410_CS4,

.end = S3C2410_CS4 + 3,

.flags = IORESOURCE_MEM,

},

[1] = {

.start = S3C2410_CS4 + 4,

.end = S3C2410_CS4 + 4 + 3,

.flags = IORESOURCE_MEM,

},

[2] = {

.start = IRQ_EINT18, /*use eint18 GPG10*/

.end = IRQ_EINT18,

.flags = IORESOURCE_IRQ,

}

};

static struct dm9000_plat_data s3c_dm9000_platdata = {

.flags = DM9000_PLATF_16BITONLY,

};

static struct platform_device s3c_device_dm9000 = {

.name = "dm9000",

.id = 0,

.num_resources = ARRAY_SIZE(s3c_dm9000_resource),

.resource = s3c_dm9000_resource,

.dev = {

.platform_data = &s3c_dm9000_platdata,

}

};

EXPORT_SYMBOL(s3c_device_dm9000);

在arch/arm/plat-s3c/include/plat/devs.h中加入一行：

extern struct platform_device s3c_device_dm9000;

编译时出现一个奇怪的错误：

arch/arm/plat-s3c24xx/devs.c:63: error: static declaration of 's3c_device_dm9000' follows non-static declaration

arch/arm/plat-s3c/include/plat/devs.h:27: error: previous declaration of 's3c_device_dm9000' was here

s3c_device_dm9000首先在devs.c中定义，在devs.h中声明，在mach-s3c2440.c中使用，看了好几遍代码，应该没什么问题。查不到什么原因，我觉得是跟编译器有关，在devs.c中做了一下修改，问题解决，编译时只出现一个warning

把devs.c中的这句：

static struct platform_device s3c_device_dm9000 = {

的static改成extern,就可以了

下面修改dm9000.c源码，在drivers/net/dm9000.c中

1. 添加头文件，在第43行加入：

 

#if defined(CONFIG_ARCH_S3C2410)

#include

#endif

2.指定注册时的中断触发方式，在第1019行加入：

static int dm9000_open(struct net_device *dev)

{

…………

irqflags |= IRQF_SHARED;

#if defined (CONFIG_ARCH_S3C2410)

if(request_irq(dev->irq,&dm9000_interrupt,IRQF_SHARED|IRQF_TRIGGER_RISING,dev->name,dev))

#else

if(request_irq(dev->irq,&dm9000_interrupt,IRQF_SHARED,dev->name,dev))

#endif

（不要忘了将这行注释掉）//if (request_irq(dev->irq, &dm9000_interrupt, irqflags, dev->name, dev))

return -EAGAIN;

…………

}

3. 设置BANK4, 设置MAC地址，在1215行，dm9000_probe函数中加入：

 

int ret = 0;

int iosize;

int i;

u32 id_val;

#if defined(CONFIG_ARCH_S3C2410)

unsigned int oldval_bwscon = *(volatile unsigned int *)S3C2410_BWSCON;

unsigned int oldval_bankcon4 = *(volatile unsigned int *)S3C2410_BANKCON4;

#endif

/* Init network device */

ndev = alloc_etherdev(sizeof(struct board_info));

if (!ndev) {

dev_err(&pdev->dev, "could not allocate device.\n");

return -ENOMEM;

}

在1231行加入：

SET_NETDEV_DEV(ndev, &pdev->dev);

dev_dbg(&pdev->dev, "dm9000_probe()\n");

#if defined(CONFIG_ARCH_S3C2410)

*((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1390行加入：

db->mii.mdio_read = dm9000_phy_read;

db->mii.mdio_write = dm9000_phy_write;

#if defined(CONFIG_ARCH_S3C2410)

printk("Now use the default MAC address: 08:90:90:90:90:90 ");

mac_src = "www.txmcu.com";

ndev->dev_addr[0] = 0x08;

ndev->dev_addr[1] = 0x90;

ndev->dev_addr[2] = 0x90;

ndev->dev_addr[3] = 0x90;

ndev->dev_addr[4] = 0x90;

ndev->dev_addr[5] = 0x90;

#else

mac_src = "eeprom";

/* try reading the node address from the attached EEPROM */

for (i = 0; i < 6; i += 2)

dm9000_read_eeprom(db, i / 2, ndev->dev_addr+i);

if (!is_valid_ether_addr(ndev->dev_addr) && pdata != NULL) {

mac_src = "platform data";

memcpy(ndev->dev_addr, pdata->dev_addr, 6);

}

if (!is_valid_ether_addr(ndev->dev_addr)) {

/* try reading from mac */

mac_src = "chip";

for (i = 0; i < 6; i++)

ndev->dev_addr[i] = ior(db, i+DM9000_PAR);

}

if (!is_valid_ether_addr(ndev->dev_addr))

dev_warn(db->dev, "%s: Invalid ethernet MAC address. Please "

"set using ifconfig\n", ndev->name);

#endif

platform_set_drvdata(pdev, ndev);

ret = register_netdev(ndev);

if (ret == 0)

printk(KERN_INFO "%s: dm9000%c at %p,%p IRQ %d MAC: %pM (%s)\n",

ndev->name, dm9000_type_to_char(db->type),

db->io_addr, db->io_data, ndev->irq,

ndev->dev_addr, mac_src);

return 0;

out:

#if defined(CONFIG_ARCH_S3C2410)

*(volatile unsigned int *)S3C2410_BWSCON = oldval_bwscon;

*(volatile unsigned int *)S3C2410_BANKCON4 = oldval_bankcon4;

#endif

配置内核，支持网卡：

Device Drivers --->

[*] Network device support --->

[*] Ethernet(10 or 100 Mbit) --->

<*> DM9000 support

(4) DM9000 maximum debug level

启动时输出：

dm9000 Ethernet Driver, V1.31

Now use the default MAC address: 08:90:90:90:90:90

eth0: dm9000e at c881c000,c8820004 IRQ 62 MAC: 08:90:90:90:90:90