mini2440移植uboot-2008.10 (二) DM9000网卡驱动移植

时间:2021-11-11 10:02:40

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-