JZ2440笔记：DM9000C网卡驱动

在厂家提供的dm9dev9000c.c上修改，

1、注释掉#ifdef MODULE  #endif

2、用模块化函数修饰入口出口函数

3、在dm9000c_init入口函数，增加iobase = (int)ioremap(0x20000000,1024);irq = IRQ_EINT7;

4、一路进入，在dmfe_probe1中注释掉if((db->chip_revision!=0x1A) || ((chip_info&(1<<5))!=0) || ((chip_info&(1<<2))!=1)) return -ENODEV;

5、dmfe_open中if (request_irq(dev->irq,&dmfe_interrupt,0,dev->name,dev))修改为if (request_irq(dev->irq,&dmfe_interrupt,IRQF_TRIGGER_RISING,dev->name,dev)) 

6、在出口函数dm9000c_exit中增加iounmap((void *)iobase);

7、增加头文件#include <asm/irq.h>
#include <asm/delay.h>
#include <asm/io.h>
#include <asm/arch-s3c2410/regs-mem.h>

编译通过。

8、在dm9000c_init入口函数里添加时序：volatile unsigned long bwscon;
    volatile unsigned long bankcon4;
    unsigned long val;
    bwscon   = ioremap(0x48000000,4);
    bankcon4 = ioremap(0x48000014,4);
    val = *bwscon;
    val &= ~(0xf<<16);
    val |= (1<<16);
    *bwscon = val;
    *bankcon4 = (1<<6);
    iounmap(bwscon);
    iounmap(bankcon4);

编译通过。

9、测试驱动：在内核/drivers/net中替换.c文档，修改makefile，编译新的uImage。烧写后，启动
# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:60:6E:33:44:55
          inet addr:192.168.42.222  Bcast:192.168.42.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:317012 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1239 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:32863664 (31.3 MiB)  TX bytes:191590 (187.0 KiB)
          Interrupt:51 Base address:0xa000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
# ping 192.168.42.144
PING 192.168.42.144 (192.168.42.144): 56 data bytes
64 bytes from 192.168.42.144: seq=0 ttl=64 time=0.865 ms
64 bytes from 192.168.42.144: seq=1 ttl=64 time=1.077 ms
64 bytes from 192.168.42.144: seq=2 ttl=64 time=1.047 ms

--- 192.168.42.144 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
round-trip min/avg/max = 0.865/0.996/1.077 ms