linux 系统下网卡phy读写程序

#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#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;
 
 
}
 

使用用法：

mdio:
read operation: mdio reg_addr
write operation: mdio reg_addr value
For example:
mdio eth0 1
mdio eth0 0 0x12