#include #define reteck(ret) \

if(ret < 0){ \

printf("%m! \"%s\" : line: %d\n", __func__, __LINE__); \

goto lab; \

}

#define help() \

printf("mdio:\n"); \

printf("read operation: mdio reg_addr\n"); \

printf("write operation: mdio reg_addr value\n"); \

printf("For example:\n"); \

printf("mdio eth0 1\n"); \

printf("mdio eth0 0 0x12\n\n"); \

exit(0);

int sockfd;

int main(int argc, char *argv[]){

if(argc == 1 || !strcmp(argv[1], "-h")){

help();

}

struct mii_ioctl_data *mii = NULL;

struct ifreq ifr;

int ret;

memset(&ifr, 0, sizeof(ifr));

strncpy(ifr.ifr_name, argv[1], IFNAMSIZ - 1);

sockfd = socket(PF_LOCAL, SOCK_DGRAM, 0);

reteck(sockfd);

//get phy address in smi bus

ret = ioctl(sockfd, SIOCGMIIPHY, &ifr);

reteck(ret);

mii = (struct mii_ioctl_data*)&ifr.ifr_data;

if(argc == 3){

mii->reg_num = (uint16_t)strtoul(argv[2], NULL, 0);

ret = ioctl(sockfd, SIOCGMIIREG, &ifr);

reteck(ret);

printf("read phy addr: 0x%x reg: 0x%x value : 0x%x\n\n", mii->phy_id, mii->reg_num, mii->val_out);

}else if(argc == 4){

mii->reg_num = (uint16_t)strtoul(argv[2], NULL, 0);

mii->val_in = (uint16_t)strtoul(argv[3], NULL, 0);

ret = ioctl(sockfd, SIOCSMIIREG, &ifr);

reteck(ret);

printf("write phy addr: 0x%x reg: 0x%x value : 0x%x\n\n", mii->phy_id, mii->reg_num, mii->val_in);

}

lab:

close(sockfd);

return 0;

}