1 | /* |
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2 | * mii-reg.c - Tim Harvey <tharvey@gateworks.com> |
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3 | * |
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4 | * Simple example of how to read/write MII registers using |
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5 | * SIOCGMIIREG/SIOCSMIIREG ioctl |
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6 | * |
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7 | * Note that your network device driver must support mdio_read/mdio_write |
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8 | * |
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9 | * Usage: |
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10 | * mii-reg <iface> <reg> [<value>] |
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11 | * |
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12 | */ |
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13 | |
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14 | #include <errno.h> |
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15 | #include <stdio.h> |
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16 | #include <stdlib.h> |
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17 | #include <string.h> |
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18 | #include <unistd.h> |
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19 | |
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20 | #include <sys/socket.h> |
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21 | #include <sys/ioctl.h> |
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22 | #include <net/if.h> |
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23 | #include <linux/mii.h> |
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24 | #include <linux/sockios.h> |
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25 | |
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26 | int main(int argc, char **argv) |
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27 | { |
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28 | char *iface; |
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29 | int sock; |
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30 | struct ifreq ifr; |
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31 | struct mii_ioctl_data *mii = (struct mii_ioctl_data*)(&ifr.ifr_data); |
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32 | int reg; |
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33 | |
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34 | if (argc < 3) { |
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35 | fprintf(stderr, "Usage: %s <iface> <reg> [<value>]\n", |
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36 | argv[0]); |
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37 | exit(1); |
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38 | } |
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39 | iface = argv[1]; |
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40 | reg = strtol(argv[2], NULL, 0); |
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41 | |
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42 | /* open socket */ |
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43 | sock = socket(AF_INET, SOCK_DGRAM, 0); |
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44 | if (sock < 0) { |
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45 | perror("socket"); |
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46 | exit(1); |
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47 | } |
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48 | |
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49 | /* get the details of the iface */ |
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50 | memset(&ifr, 0, sizeof(ifr)); |
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51 | strncpy(ifr.ifr_name, iface, IFNAMSIZ); |
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52 | if (ioctl(sock, SIOCGMIIPHY, &ifr) < 0) { |
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53 | perror("SIOCGMIIPHY"); |
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54 | exit(1); |
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55 | } |
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56 | |
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57 | mii->reg_num = reg; |
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58 | if (argc > 3) { |
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59 | mii->val_in = strtol(argv[3], NULL, 0); |
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60 | if (ioctl(sock, SIOCSMIIREG, &ifr) < 0) { |
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61 | perror("SIOCSMIIREG"); |
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62 | exit(1); |
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63 | } |
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64 | } |
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65 | mii->val_in = 0; |
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66 | mii->val_out = 0; |
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67 | if (ioctl(sock, SIOCGMIIREG, &ifr) < 0) { |
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68 | perror("SIOCGMIIREG"); |
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69 | exit(1); |
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70 | } |
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71 | printf("%s phyid=0x%02x reg=0x%02x val=0x%04x\n", |
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72 | iface, mii->phy_id, mii->reg_num, mii->val_out); |
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73 | |
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74 | /* read */ |
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75 | close(sock); |
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76 | |
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77 | return 0; |
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78 | } |
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