DM9000A驱动在FL2440的移植(2.6.33.7内核)

iletlet

一、移植环境

    主  机：Fedora 14 （kernel-2.6.33.7）
    开发板：FL2440(nandflash:K9F1G08 128MB)

    编译器：arm-linux-gcc-4.3.2

 

二、移植步骤

    1. 在没有移植驱动之前，从系统的启动信息我们可以看到，开发板无法检测到网卡的存在。

1. init started: BusyBox v1.6.0 (2008-01-09 17:10:28 CST) multi-call binary
   
2. starting pid 940, tty '': '/etc/init.d/rcS'
   
3. mount: mounting none on /dev/pts failed
   
4. mount: mounting tmpfs on /dev/shm failed
   
5. ifconfig: SIOCSIFADDR: No such device
   
6. ifconfig: SIOCSIFADDR: No such device

  2. FL2440开发板采用的是DM9000网络适配卡，linux-2.6.33.7内核中已经同样对D9000网卡有了很好的支持，我所要做的就是对驱动进行必要的修改和配置。首先增加DM9000的基地址和虚拟地址的定义。

1. #vim arch/arm/mach-s3c2410/include/mach/map.h
   
2. #define S3C24XX_PA_DM9000 (0x20000300)
   
3. #define S3C24XX_VA_DM9000 (0xE0000000)

  3. 创建DM9000设备IO资源到内核虚拟地址的映射，如下。

1. #vim arch/arm/mach/s3c2410/mach-smdk2410.c
2. (这次我直接修改mach-smdk2410.c而不是mach-smdk2440.c了，mach-smdk2440.c的修改总是不起作用，
3. 而要去修改mach-smdk2410.c，原因还没找到。)
   
4. 
   
5. static struct map_desc smdk2410_iodesc[] __initdata = {
6.   /* nothing here yet */
7.         [0] = {
8.                 .virtual = (unsigned long)S3C24XX_VA_DM9000,
9.                 .pfn = __phys_to_pfn(S3C24XX_PA_DM9000),
10.                 .length = SZ_1M,
11.                 .type = MT_DEVICE,
12.         },
13. };

  4. 在设备初始化中添加对DM9000设备的支持。

1. #vim arch/arm/mach/s3c2410/mach-smdk2410.c
   
2. static struct platform_device *smdk2410_devices[] __initdata = {
   
3.         &s3c_device_usb,
   
4.         &s3c_device_lcd,
   
5.         &s3c_device_wdt,
   
6.         &s3c_device_i2c0,
   
7.         &s3c_device_iis,
   
8.         &s3c_device_rtc,
   
9.         &s3c24xx_uda134x, //uda
   
10.         &s3c_device_dm9000,
    
11. };

  5. 在内核中注册DM9000设备，添加如下内容。

1. //添加头文件：
   
2. #vim arch/arm/plat-s3c24xx/devs.c
   
3. #include <linux/dm9000.h>
   
4. //注册DM9000:
   
5. static struct resource s3c_dm9000_resource[] = {
   
6.         [0] = {
   
7.                 .start = S3C24XX_PA_DM9000,
   
8.                 .end = S3C24XX_PA_DM9000+ 0x3,
   
9.                 .flags = IORESOURCE_MEM
   
10.         },
    
11.         [1] = {
    
12.                 .start = S3C24XX_PA_DM9000 + 0x4, //CMD pin is A2
    
13.                 .end = S3C24XX_PA_DM9000 + 0x4 + 0x7c,
    
14.                 .flags = IORESOURCE_MEM
    
15.         },
    
16.         [2] = {
    
17.                 .start = IRQ_EINT7,
    
18.                 .end = IRQ_EINT7,
    
19.                 .flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHLEVEL//IRQF_TRIGGER_RISING
    
20.         },
    
21. };
    
22. 
    
23. static struct dm9000_plat_data s3c_device_dm9000_platdata = {
    
24.         .flags= DM9000_PLATF_16BITONLY | DM9000_PLATF_NO_EEPROM,
    
25. };
    
26. 
    
27. struct platform_device s3c_device_dm9000 = {
    
28.         .name= "dm9000",
    
29.         .id= 0,
    
30.         .num_resources= ARRAY_SIZE(s3c_dm9000_resource),
    
31.         .resource= s3c_dm9000_resource,
    
32.         .dev= {
    
33.                .platform_data = &s3c_device_dm9000_platdata,
    
34.         }
    
35. 
    
36. };
    
37. EXPORT_SYMBOL(s3c_device_dm9000);

  6. 在头文件中声明第三步中定义的s3c_device_dm9000

1. # vi arch/arm/plat-s3c/include/plat/devs.h
   
2. extern struct platform_device s3c_device_rtc;
   
3. extern struct platform_device s3c_device_adc;
   
4. extern struct platform_device s3c_device_sdi;
   
5. extern struct platform_device s3c_device_iis;
   
6. extern struct platform_device s3c_device_dm9000;

  7. 修改DM9000驱动源码，主要是dm9000_probe函数。

1. //增加头文件:
   
2. #include <mach/regs-gpio.h>
   
3. #include <mach/irqs.h>
   
4. #include <mach/hardware.h>
   
5. //在dm9000_probe 函数开始:
   
6. static int __devinit
   
7. dm9000_probe(struct platform_device *pdev)
   
8. {
   
9.         unsigned char ne_def_eth_mac_addr[] = {
   
10.                 0x00,0x12,0x34,0x56,0x80,0x49
    
11.         };
    
12.         static void *bwscon;
    
13.         static void *gpfcon;
    
14.         static void *extint0;
    
15.         static void *intmsk;
    
16. 
    
17.         #define BWSCON 0x48000000
    
18.         #define GPFCON 0x56000050
    
19.         #define EXTINT0 0x56000088
    
20.         #define INTMSK 0x4A000008
    
21. 
    
22.         bwscon = ioremap_nocache(BWSCON,0x00000004);
    
23.         gpfcon = ioremap_nocache(GPFCON,0x00000004);
    
24.         extint0 = ioremap_nocache(EXTINT0,0x00000004);
    
25.         intmsk = ioremap_nocache(INTMSK,0x00000004);
    
26. 
    
27.         writel(readl(bwscon)|0xc0000,bwscon);
    
28.         writel((readl(gpfcon)&~(0x3<<4))|(0x2<<4),gpfcon);
    
29.         writel(readl(gpfcon)|(0x1<<7),gpfcon); //disable pull-up
    
30.         writel((readl(extint0)&~(0xf<<28))|(0x4<<28),extint0);//rising edge
    
31.         writel((readl(intmsk)) & ~0x80,intmsk);
    
32. //在这个函数最后修改以下位置
    
33.     if (!is_valid_ether_addr(ndev->dev_addr)) {
    
34.                 /* try reading from mac */
    
35.                 
    
36.                 mac_src = "chip";
    
37.                 for (i = 0; i < 6; i++)
    
38.                         //ndev->dev_addr[i] = ior(db, i+DM9000_PAR);
    
39.                         ndev->dev_addr[i] = ne_def_eth_mac_addr[i];//修改这里
    
40.         }

  8. 编译生成zImage文件，下载到开发板，从启动信息中可以看到，开发板已经可以检测到DM9000网卡驱动：至于“ifconfig: SIOCSIFADDR: No such device”这个信息，我还没有找到原因和解决办法。

1. starting pid 942, tty '': '/etc/init.d/rcS'
2. mount: mounting none on /dev/pts failed
3. mount: mounting tmpfs on /dev/shm failed
4. dm9000 dm9000.0: WARNING: no IRQ resource flags set.
5. eth0: link down
6. ifconfig: SIOCSIFADDR: No such device

  然后就是我们平时熟悉的操作了:

1. #ifconfig lo 127.0.0.1
2. #ifconfig eth0 169.254.244.205
3. # ping 169.254.244.206(我主机的IP)
4. 
   
5. PING 169.254.244.206 (169.254.244.206): 56 data bytes
6. 64 bytes from 169.254.244.206: seq=0 ttl=40 time=5.9 ms
7. 64 bytes from 169.254.244.206: seq=1 ttl=40 time=1.2 ms
8. 64 bytes from 169.254.244.206: seq=2 ttl=40 time=1.3 ms
9. 64 bytes from 169.254.244.206: seq=3 ttl=40 time=1.2 ms
10. 64 bytes from 169.254.244.206: seq=4 ttl=40 time=1.2 ms
11. 64 bytes from 169.254.244.206: seq=5 ttl=40 time=1.3 ms
12. 64 bytes from 169.254.244.206: seq=6 ttl=40 time=1.3 ms
13. 64 bytes from 169.254.244.206: seq=7 ttl=40 time=1.3 ms
14. 64 bytes from 169.254.244.206: seq=8 ttl=40 time=1.3 ms
15. 64 bytes from 169.254.244.206: seq=9 ttl=40 time=1.2 ms
16. 64 bytes from 169.254.244.206: seq=10 ttl=40 time=1.3 ms
17. ^C
18. --- 169.254.244.206 ping statistics ---
    
19. 11 packets transmitted, 11 packets received, 000000000acket loss
20. round-trip min/avg/max = 1.2/1.6/5.9 ms

OK，网卡驱动也终于搞掂了。。

2011-01-27