所属类别：Linux

文章作者：yanys113

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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.o3、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 #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 e000030apgd = c0004000[e000030a] *pgd=00000000Internal error: Oops: 805 [#1]Modules linked in:CPU: 0PC is at cs8900_probe+0x10c/0x304LR is at 0xe0000300pc : [] lr : [] Not taintedsp : c02cbf60 ip : c01ca51c fp : c02cbf84r10: 00000000 r9 : 00000000 r8 : 00000000r7 : 00000002 r6 : 00000000 r5 : c01d5e3c r4 : c021d2b8r3 : e000030a r2 : 00000000 r1 : c3ceea80 r0 : e000030aFlags: NzCv IRQs on FIQs on Mode SVC_32 Segment kernelControl: 717F Table: 30004000 DAC: 00000017Process swapper (pid: 1, stack limit = 0xc02ca198)Stack: (0xc02cbf60 to 0xc02cc000)bf60: c02cbfa4 c02cbf70 c01d5e3c 00000000 00000000 c001c2d8 c02cbfa4 c02cbf88bf80: c01391fc c00182d4 c01d5e3c 00000000 c01d5e3c 00000000 c02cbfbc c02cbfa8bfa0: c0139544 c013912c c01d5e3c c02ca000 c02cbfd0 c02cbfc0 c00185ec c01394ecbfc0: c001c278 c02cbff4 c02cbfd4 c001f0f4 c00185d8 00000001 00000000 00000000bfe0: 00000000 00000000 00000000 c02cbff8 c0038084 c001f068 0000006f 5f6f6962Backtrace:[] (cs8900_probe+0x0/0x304) from [] (register_netdevice+0xe)r7 = C001C2D8 r6 = 00000000 r5 = 00000000 r4 = C01D5E3C[] (register_netdevice+0x0/0x3c0) from [] (register_netdev+)r6 = 00000000 r5 = C01D5E3C r4 = 00000000[] (register_netdev+0x0/0x7c) from [] (cs8900_init+0x24/0x3)r5 = C02CA000 r4 = C01D5E3C[] (cs8900_init+0x0/0x30) from [] (init+0x9c/0x220)r4 = C001C278[] (init+0x0/0x220) from [] (do_exit+0x0/0x714)r7 = 00000000 r6 = 00000000 r5 = 00000000 r4 = 00000000Code: 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。打开/arch/arm/mach-s3c2410/mach-smdk2410.c在开始处加入：#include /* ++ */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 Support7、保存，进行编译。make zImage8、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 bytes64 bytes from 202.198.137.100: seq=0 ttl=64 time=1.504 ms64 bytes from 202.198.137.100: seq=1 ttl=64 time=1.194 ms64 bytes from 202.198.137.100: seq=2 ttl=64 time=1.043 ms64 bytes from 202.198.137.100: seq=3 ttl=64 time=1.025 ms移植完成，表明成功。增加与 文件:file.rar大小:11KB下载:下载修改的一些文件我将上传上来。

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