由于这块网卡芯片的应用很广泛，在linux下的移植的文档相当多，我们要做的也就是只是稍作改以便适合我们的自己的系统。 昨天的进展比较快，把内核弄好了。整个移植过程参考了网上一些同行的笔记。在网上找到了网卡的驱动程序文件，cs8900.h与cs8900.c这两个。 先说一下我的编译环境：

linux系统：ubuntu8.04

编译器版本：arm-linux-3.4.1 glibc-2.2.3

目前网上的移植主要有两种思路，一种是在drivers/net/arm目录下进行相关文件的添加与修改、另一种是在drivers/net下进行相关的文件的添加与修改。我用的是第一种：

下面是整个过程：

1、

将cs8900.h与cs8900.c拷贝到drivers/net/arm目录下。

2、

修改drivers/net/arm目录下的Makefile，以使其对网卡程序进行编译

emacs Makefile

在后面加上这一句：obj-$(CONFIG_ARM_CS8900)    += cs8900.o

3、

为网卡驱动程序中用到的一些宏定义添加一个头文件：

打开目录include/asm-arm/arch-s3c2410/

新建文件smdk2410.h

加入以下内容：

#ifndef _INCLUDE_SMDK2410_H_
#define _INCLUDE_SMDK2410_H_
#include <linux/config.h>
#define pSMDK2410_ETH_IO __phys_to_pfn(0x19000000)
#define vSMDK2410_ETH_IO 0xE0000000
#define SMDK2410_ETH_IRQ IRQ_EINT9
#endif // _INCLUDE_SMDK2410_H_
注意红色部分，我原来是用#define pSMDK2410_ETH_IO 0x19000000这样的一句代替它，但是编译通过后网络不通,串口显示是了错误：

Cirrus Logic CS8900A driver for Linux (Modified for SMDK2410)                  
Unable to handle kernel paging request at virtual address e000030a             
pgd = c0004000                                                                 
[e000030a] *pgd=00000000                                                       
Internal error: Oops: 805 [#1]                                                 
Modules linked in:                                                             
CPU: 0                                                                         
PC is at cs8900_probe+0x10c/0x304                                              
LR is at 0xe0000300                                                            
pc : [<c00183d0>]    lr : [<e0000300>]    Not tainted                          
sp : c02cbf60 ip : c01ca51c fp : c02cbf84                                    
r10: 00000000 r9 : 00000000 r8 : 00000000                                    
r7 : 00000002 r6 : 00000000 r5 : c01d5e3c r4 : c021d2b8                     
r3 : e000030a r2 : 00000000 r1 : c3ceea80 r0 : e000030a                     
Flags: NzCv IRQs on FIQs on Mode SVC_32 Segment kernel                     
Control: 717F Table: 30004000 DAC: 00000017                                  
Process swapper (pid: 1, stack limit = 0xc02ca198)                             
Stack: (0xc02cbf60 to 0xc02cc000)                                              
bf60: c02cbfa4 c02cbf70 c01d5e3c 00000000 00000000 c001c2d8 c02cbfa4 c02cbf88  
bf80: c01391fc c00182d4 c01d5e3c 00000000 c01d5e3c 00000000 c02cbfbc c02cbfa8  
bfa0: c0139544 c013912c c01d5e3c c02ca000 c02cbfd0 c02cbfc0 c00185ec c01394ec  
bfc0: c001c278 c02cbff4 c02cbfd4 c001f0f4 c00185d8 00000001 00000000 00000000  
bfe0: 00000000 00000000 00000000 c02cbff8 c0038084 c001f068 0000006f 5f6f6962  
Backtrace:                                                                     
[<c00182c4>] (cs8900_probe+0x0/0x304) from [<c01391fc>] (register_netdevice+0xe)
r7 = C001C2D8 r6 = 00000000 r5 = 00000000 r4 = C01D5E3C                    
[<c013911c>] (register_netdevice+0x0/0x3c0) from [<c0139544>] (register_netdev+)
r6 = 00000000 r5 = C01D5E3C r4 = 00000000                                   
[<c01394dc>] (register_netdev+0x0/0x7c) from [<c00185ec>] (cs8900_init+0x24/0x3)
r5 = C02CA000 r4 = C01D5E3C                                                  
[<c00185c8>] (cs8900_init+0x0/0x30) from [<c001f0f4>] (init+0x9c/0x220)        
r4 = C001C278                                                                 
[<c001f058>] (init+0x0/0x220) from [<c0038084>] (do_exit+0x0/0x714)            
r7 = 00000000 r6 = 00000000 r5 = 00000000 r4 = 00000000                    
Code: e28e000a e3500201 e1a03000 328334f2 (e1c360b0)                           
<0>Kernel panic - not syncing: Attempted to kill init!

应该是虚拟地址问题。

4、

为cs8900a芯片增加物理地址到虚拟地址的映射并把刚才建的头文件加进来：

打开/arch/arm/mach-s3c2410/mach-smdk2410.c

在smdk2410_iodesc[]数组内加入

{vSMDK2410_ETH_IO, pSMDK2410_ETH_IO, SZ_1M, MT_DEVICE}

加入之后的内容应该是：

static struct map_desc smdk2410_iodesc[] __initdata = {
       /* nothing here yet */
        /* Map the ethernet controller CS8900A */        {vSMDK2410_ETH_IO, pSMDK2410_ETH_IO, SZ_1M, MT_DEVICE}
};

加入刚才的头文件，不加头文件过来将显示几个宏定的变量没有定义，编译通不过。

#include <asm-arm/arch-s3c2410/smdk2410.h>/* ++ */

5、

在配置选项中加入配置CS8900的选项

打开drivers/net/arm/Kconfig文件，在后面加入:

Config ARM_CS8900
   tristate "CS8900 support"
   depends on NET_ETHERNET && ARM && ARCH_SMDK2410
   help
   Support for CS8900A chipset based Ethernet cards. If you have a   network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from as well as .
   To compile this driver as a module, choose M here and read
. The module will be
   called cs8900.o.

(后面这些帮助信息你自己随便加了，无所谓的，这个我也是抄网上的)

6、

进行配置

make menuconfig

出现配置界面进行配置:

选中如下的选项：

Device drivers ---->

         Network device support --->

         Ethernet (10 or 100 Mbit)----->

                     CS8900 Support

7、保存，进行编译。

make zImage

8、生成uImage通过tftp下载。

启动后挂载NFS文件系统后进行ping测试：

PING 202.198.137.100 (202.198.137.100): 56 data bytes                          
64 bytes from 202.198.137.100: seq=0 ttl=64 time=1.504 ms                      
64 bytes from 202.198.137.100: seq=1 ttl=64 time=1.194 ms                      
64 bytes from 202.198.137.100: seq=2 ttl=64 time=1.043 ms                      
64 bytes from 202.198.137.100: seq=3 ttl=64 time=1.025 ms

移植完成，表明成功。