还是利用 mini2440移植uboot-2008.10 (一) 修改好的代码
通过观察可以发现,mini2400使用的网卡芯片是DM9000,在uboot-2008.10源码中已经支持该芯片的驱动(drivers/net/dm9000.c),但是并不完善
具体原理还不是很清楚,现在只是做一下移植步骤的记录
1、修改uboot配置文件(include/configs/mini2440.h)
53 /*
54 * Hardware drivers
55 */
56 #if 0
57 #define CONFIG_DRIVER_CS8900 1 /* we have a CS8900 on-board */
58 #define CS8900_BASE 0x19000300
59 #define CS8900_BUS16 1 /* the Linux driver does accesses as shorts */
60 #endif
61
62 #define CONFIG_DRIVER_DM9000 1
63 #define CONFIG_DM9000_USE_16BIT 1
64 #define CONFIG_DM9000_BASE 0x20000300
65 #define DM9000_IO 0x20000300
66 #define DM9000_DATA 0x20000304
2、添加对ping命令的支持
98 #define CONFIG_CMD_CACHE
99 #define CONFIG_CMD_DATE
100 #define CONFIG_CMD_ELF
101 #define CONFIG_CMD_PING //此为添加的代码
3、修改网卡驱动
在网卡驱动drivers/net/dm9000x.c中,有一段程序试图连接网卡MII接口,而实际上此接口未使用,会有10s钟等待然后报错,可以将此注释掉
282 /* Initilize dm9000 board
283 */
284 int
285 eth_init(bd_t * bd)
286 {
287 int i, oft, lnk;
288 u8 io_mode;
289 struct board_info *db = &dm9000_info;
.................................
385 /* Enable TX/RX interrupt mask */
386 DM9000_iow(DM9000_IMR, IMR_PAR);
387 //注释开始
388 #if 0
389 i = 0;
390 while (!(phy_read(1) & 0x20)) { /* autonegation complete bit */
391 udelay(1000);
392 i++;
393 if (i == 10000) {
394 printf("could not establish link\n");
395 return 0;
396 }
397 }
398
399 /* see what we've got */
400 lnk = phy_read(17) >> 12;
401 printf("operating at ");
402 switch (lnk) {
403 case 1:
404 printf("10M half duplex ");
405 break;
406 case 2:
407 printf("10M full duplex ");
408 break;
409 case 4:
410 printf("100M half duplex ");
411 break;
412 case 8:
413 printf("100M full duplex ");
414 break;
415 default:
416 printf("unknown: %d ", lnk);
417 break;
418 }
419 printf("mode\n");
420 #endif //注释结束
421 return 0;
422 }
4、至此网卡修改完成,最近进行编译
#make clean
#make mini2440_config
#make CROSS_COMPILE=arm-linux-