s5pv210 uboot-2012-10移植(五) 之支持LAN9220网卡
我的s5pv210开发板是100M的LAN9220网卡芯片，通过CS5的总线连接的，对应的地址空间是0xA8000000，16位的。
1.跟踪代码发现在smc9115_pre_init里配置总线，board/samsung/smdkv210/smdkc100.c +36
/*
* Miscellaneous platform dependent initialisations
*/
static void smc9115_pre_init(void)
{
#define SROM_BW (*(volatile unsigned int *)0xE8000000)
#define SROM_BC5 (*(volatile unsigned int *)0xE8000018)
#define MP0_1CON (*(volatile unsigned int *)0xE02002E0)
#if 0
u32 smc_bw_conf, smc_bc_conf;
struct s5pc100_gpio *const gpio =
(struct s5pc100_gpio *)samsung_get_base_gpio();
/* gpio configuration GPK0CON */
s5p_gpio_cfg_pin(&gpio->k0, CONFIG_ENV_SROM_BANK, GPIO_FUNC(2));
/* Ethernet needs bus width of 16 bits */
smc_bw_conf = SMC_DATA16_WIDTH(CONFIG_ENV_SROM_BANK);
smc_bc_conf = SMC_BC_TACS(0x0) | SMC_BC_TCOS(0x4) | SMC_BC_TACC(0xe)
| SMC_BC_TCOH(0x1) | SMC_BC_TAH(0x4)
| SMC_BC_TACP(0x6) | SMC_BC_PMC(0x0);
/* Select and configure the SROMC bank */
s5p_config_sromc(CONFIG_ENV_SROM_BANK, smc_bw_conf, smc_bc_conf);
#endif
unsigned int tmp;
SROM_BW &= ~((0xf<<20));
SROM_BW |= ((3<<20));
tmp = MP0_1CON;
tmp &= ~((0xf<<20)|(0xf<<12));
tmp |= ((0x2<<20)|(0x2<<12));
MP0_1CON = tmp;
}
2.跟踪代码，在board_eth_init函数里，初始化LAN9220网卡，需要传入CONFIG_SMC911X_BASE基地址
int board_eth_init(bd_t *bis)
{
int rc = 0;
#ifdef CONFIG_SMC911X
rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
//printf ("rc: %d\n", rc);
#endif
return rc;
}
修改include/configs/smdkv210.h +241
/* * Ethernet Contoller driver */ #ifdef CONFIG_CMD_NET #define CONFIG_SMC911X 1 /* we have a SMC9115 on-board */ #define CONFIG_SMC911X_16_BIT 1 /* SMC911X_16_BIT Mode */ #define CONFIG_SMC911X_BASE 0xA8000000 /* SMC911X Drive Base */ #define CONFIG_ENV_SROM_BANK 3 /* Select SROM Bank-3 for Ethernet*/ #endif /* CONFIG_CMD_NET */
3.make，把BL1和UBOOT烧写到SD卡里，启动，可以识别网卡芯片，使用ping 192.168.0.1会发现不支持ping命令
4.搜索代码，发现需要配置CONFIG_CMD_PING，include/configs/smdkv210.h +246
#ifdef CONFIG_CMD_NET #define CONFIG_SMC911X 1 /* we have a SMC9115 on-board */ #define CONFIG_SMC911X_16_BIT 1 /* SMC911X_16_BIT Mode */ #define CONFIG_SMC911X_BASE 0xA8000000 /* SMC911X Drive Base */ #define CONFIG_ENV_SROM_BANK 3 /* Select SROM Bank-3 for Ethernet*/ #define CONFIG_CMD_PING #endif /* CONFIG_CMD_NET */
5.make，把BL1和UBOOT烧写到SD卡里，启动，可以识别网卡芯片，使用ping 192.168.0.1会发先错误，没有设置网卡物理地址和板子的ip地址
6.设置环境变量，ping
7.每次重启后都需要重新配置，很麻烦的， include/configs/smdkv210.h +248
#define CONFIG_NETMASK 255.255.255.0 #define CONFIG_IPADDR 192.168.0.89 #define CONFIG_SERVERIP 192.168.0.88 #define CONFIG_ETHADDR 00:40:5c:26:0a:5b #define CONFIG_GATEWAYIP 192.168.0.1
8.make,烧写到SD卡中，上电，ping可以从控制台里看到，在通过tftp命令从服务器端下载uImage，或者可以printenv看看有没有在环境变量里设定。
