对于一款芯片,经常要适配不同的板卡,适配不同的phy,前期为了确认phy是否工作正常,需要和硬件一起排查硬件,调试驱动,耗费较多软件工程师的时间。
本文可以提供一个mdio工具,由硬件工程师先确认phy硬件工作正常。
如下代码,使用相应的工具链编译生成可执行文件即可。
#include <stdio.h> #include <stdlib.h> #include <string.h> #include <linux/mii.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <net/if.h> #include <linux/sockios.h> #include <linux/types.h> #include <netinet/in.h> #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); if(mii->reg_num == 1) { if(mii->val_out&0x0004){ printf("100M link up\n"); }else{ printf("100M link down\n"); } } }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; }