1 | /* Simple (default) implementation for SIOCGIFMEDIA/SIOCSIFMEDIA |
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2 | * to be used by ethernet drivers [from their ioctl]. |
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3 | * |
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4 | * KERNEL PART (support for drivers) |
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5 | * |
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6 | * NOTE: This much simpler than the BSD ifmedia API |
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7 | */ |
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8 | |
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9 | /* |
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10 | * Authorship |
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11 | * ---------- |
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12 | * This software was created by |
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13 | * Till Straumann <strauman@slac.stanford.edu>, 2005, |
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14 | * Stanford Linear Accelerator Center, Stanford University. |
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15 | * |
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16 | * Acknowledgement of sponsorship |
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17 | * ------------------------------ |
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18 | * This software was produced by |
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19 | * the Stanford Linear Accelerator Center, Stanford University, |
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20 | * under Contract DE-AC03-76SFO0515 with the Department of Energy. |
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21 | * |
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22 | * Government disclaimer of liability |
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23 | * ---------------------------------- |
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24 | * Neither the United States nor the United States Department of Energy, |
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25 | * nor any of their employees, makes any warranty, express or implied, or |
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26 | * assumes any legal liability or responsibility for the accuracy, |
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27 | * completeness, or usefulness of any data, apparatus, product, or process |
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28 | * disclosed, or represents that its use would not infringe privately owned |
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29 | * rights. |
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30 | * |
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31 | * Stanford disclaimer of liability |
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32 | * -------------------------------- |
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33 | * Stanford University makes no representations or warranties, express or |
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34 | * implied, nor assumes any liability for the use of this software. |
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35 | * |
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36 | * Stanford disclaimer of copyright |
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37 | * -------------------------------- |
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38 | * Stanford University, owner of the copyright, hereby disclaims its |
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39 | * copyright and all other rights in this software. Hence, anyone may |
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40 | * freely use it for any purpose without restriction. |
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41 | * |
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42 | * Maintenance of notices |
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43 | * ---------------------- |
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44 | * In the interest of clarity regarding the origin and status of this |
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45 | * SLAC software, this and all the preceding Stanford University notices |
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46 | * are to remain affixed to any copy or derivative of this software made |
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47 | * or distributed by the recipient and are to be affixed to any copy of |
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48 | * software made or distributed by the recipient that contains a copy or |
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49 | * derivative of this software. |
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50 | * |
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51 | * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03 |
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52 | */ |
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53 | |
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54 | /* include first to avoid 'malloc' clash with rtems_bsdnet_malloc() hack */ |
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55 | |
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56 | #include <machine/rtems-bsd-kernel-space.h> |
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57 | |
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58 | #include <rtems/bsd/sys/param.h> |
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59 | #include <sys/mbuf.h> |
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60 | #include <sys/socket.h> |
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61 | #include <sys/sockio.h> |
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62 | #include <net/ethernet.h> |
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63 | #include <net/if.h> |
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64 | |
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65 | #include <rtems/rtems_mii_ioctl.h> |
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66 | |
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67 | #include <errno.h> |
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68 | |
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69 | |
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70 | #define DEBUG |
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71 | |
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72 | |
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73 | #ifndef MII_1000TCR |
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74 | #define MII_1000TCR MII_100T2CR |
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75 | #endif |
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76 | |
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77 | #ifndef MII_1000TSR |
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78 | #define MII_1000TSR MII_100T2SR |
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79 | #endif |
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80 | |
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81 | int |
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82 | rtems_mii_ioctl (struct rtems_mdio_info *info, void *uarg, uint32_t cmd, |
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83 | int *media) |
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84 | { |
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85 | uint32_t bmcr, bmsr, aner, bmcr2 = 0, bmsr2 = 0, anar, lpar; |
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86 | int phy = IFM_INST (*media); |
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87 | uint32_t tmp; |
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88 | int subtype = 0, options = 0; |
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89 | |
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90 | switch (cmd) { |
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91 | default: |
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92 | return EINVAL; |
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93 | |
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94 | #ifdef DEBUG |
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95 | case 0: |
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96 | #endif |
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97 | case SIOCGIFMEDIA: |
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98 | if (info->mdio_r (phy, uarg, MII_BMCR, &bmcr)) |
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99 | return EINVAL; |
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100 | /* read BMSR twice to clear latched link status low */ |
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101 | if (info->mdio_r (phy, uarg, MII_BMSR, &bmsr)) |
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102 | return EINVAL; |
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103 | if (info->mdio_r (phy, uarg, MII_BMSR, &bmsr)) |
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104 | return EINVAL; |
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105 | if (info->mdio_r (phy, uarg, MII_ANER, &aner)) |
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106 | return EINVAL; |
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107 | if (info->has_gmii) { |
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108 | if (info->mdio_r (phy, uarg, MII_1000TCR, &bmcr2)) |
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109 | return EINVAL; |
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110 | if (info->mdio_r (phy, uarg, MII_1000TSR, &bmsr2)) |
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111 | return EINVAL; |
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112 | } |
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113 | |
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114 | /* link status */ |
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115 | if (BMSR_LINK & bmsr) |
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116 | options |= IFM_LINK_OK; |
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117 | |
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118 | /* do we have autonegotiation disabled ? */ |
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119 | if (!(BMCR_AUTOEN & bmcr)) { |
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120 | options |= IFM_ANEG_DIS; |
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121 | |
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122 | /* duplex is enforced */ |
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123 | options |= BMCR_FDX & bmcr ? IFM_FDX : IFM_HDX; |
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124 | |
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125 | /* determine speed */ |
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126 | switch (BMCR_SPEED (bmcr)) { |
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127 | case BMCR_S10: |
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128 | subtype = IFM_10_T; |
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129 | break; |
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130 | case BMCR_S100: |
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131 | subtype = IFM_100_TX; |
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132 | break; |
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133 | case BMCR_S1000: |
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134 | subtype = IFM_1000_T; |
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135 | break; |
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136 | default: |
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137 | return ENOTSUP; /* ?? */ |
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138 | } |
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139 | } else if (!(BMSR_LINK & bmsr) || !(BMSR_ACOMP & bmsr)) { |
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140 | subtype = IFM_NONE; |
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141 | } else { |
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142 | /* everything ok on our side */ |
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143 | |
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144 | if ( ! (ANER_LPAN & aner) ) { |
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145 | /* Link partner doesn't autonegotiate --> our settings are the |
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146 | * result of 'parallel detect' (in particular: duplex status is HALF |
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147 | * according to the standard!). |
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148 | * Let them know that something's fishy... |
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149 | */ |
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150 | options |= IFM_ANEG_DIS; |
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151 | } |
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152 | |
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153 | tmp = ((bmcr2 << 2) & bmsr2) & (GTSR_LP_1000THDX | GTSR_LP_1000TFDX); |
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154 | if (tmp) { |
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155 | if (GTSR_LP_1000TFDX & tmp) |
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156 | options |= IFM_FDX; |
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157 | subtype = IFM_1000_T; |
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158 | } else { |
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159 | if (info->mdio_r (phy, uarg, MII_ANAR, &anar)) |
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160 | return EINVAL; |
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161 | if (info->mdio_r (phy, uarg, MII_ANLPAR, &lpar)) |
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162 | return EINVAL; |
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163 | if (ANLPAR_ACK & lpar) { |
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164 | /* this is a negotiated link; otherwise we merely detect the partner's ability */ |
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165 | } |
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166 | tmp = anar & lpar; |
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167 | if (ANLPAR_TX_FD & tmp) { |
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168 | options |= IFM_FDX; |
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169 | subtype = IFM_100_TX; |
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170 | } else if (ANLPAR_T4 & tmp) { |
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171 | subtype = IFM_100_T4; |
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172 | } else if (ANLPAR_TX & tmp) { |
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173 | subtype = IFM_100_TX; |
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174 | } else if (ANLPAR_10_FD & tmp) { |
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175 | options |= IFM_FDX; |
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176 | subtype = IFM_10_T; |
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177 | } else { |
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178 | subtype = IFM_10_T; |
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179 | } |
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180 | } |
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181 | } |
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182 | |
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183 | *media = IFM_MAKEWORD (IFM_ETHER, subtype, options, phy); |
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184 | |
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185 | break; |
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186 | |
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187 | #ifdef DEBUG |
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188 | case 1: |
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189 | #endif |
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190 | case SIOCSIFMEDIA: |
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191 | if (IFM_ETHER != IFM_TYPE (*media)) |
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192 | return EINVAL; |
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193 | |
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194 | if (info->mdio_r (phy, uarg, MII_BMSR, &bmsr)) |
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195 | return EINVAL; |
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196 | |
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197 | tmp = (IFM_FDX & *media); |
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198 | |
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199 | switch (IFM_SUBTYPE (*media)) { |
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200 | default: |
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201 | return ENOTSUP; |
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202 | |
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203 | case IFM_AUTO: |
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204 | bmcr = BMCR_AUTOEN | BMCR_STARTNEG; |
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205 | tmp = 0; |
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206 | break; |
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207 | |
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208 | case IFM_1000_T: |
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209 | if (!info->has_gmii) |
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210 | return ENOTSUP; |
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211 | |
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212 | if (info->mdio_r (phy, uarg, MII_EXTSR, &bmsr2)) |
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213 | return EINVAL; |
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214 | |
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215 | if (!(bmsr2 & (tmp ? EXTSR_1000TFDX : EXTSR_1000THDX))) |
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216 | return EOPNOTSUPP; |
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217 | |
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218 | /* NOTE: gige standard demands auto-negotiation for gige links. |
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219 | * Disabling autoneg did NOT work on the PHYs I tried |
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220 | * (BCM5421S, intel 82540). |
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221 | * I've seen drivers that simply change what they advertise |
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222 | * to the desired gig mode and re-negotiate. |
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223 | * We could do that here, too, but we don't see the point - |
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224 | * If autoneg works fine then we can as well use it. |
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225 | */ |
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226 | bmcr = BMCR_S1000; |
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227 | break; |
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228 | |
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229 | case IFM_100_TX: |
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230 | if (!(bmsr & (tmp ? BMSR_100TXFDX : BMSR_100TXHDX))) |
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231 | return EOPNOTSUPP; |
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232 | bmcr = BMCR_S100; |
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233 | break; |
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234 | |
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235 | case IFM_10_T: |
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236 | if (!(bmsr & (tmp ? BMSR_10TFDX : BMSR_10THDX))) |
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237 | return EOPNOTSUPP; |
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238 | bmcr = BMCR_S10; |
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239 | break; |
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240 | } |
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241 | |
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242 | if (tmp) |
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243 | bmcr |= BMCR_FDX; |
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244 | |
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245 | if (info->mdio_w (phy, uarg, MII_BMCR, bmcr)) |
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246 | return EINVAL; |
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247 | |
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248 | /* TODO: should we adapt advertised capabilites ? */ |
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249 | |
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250 | break; |
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251 | } |
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252 | |
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253 | return 0; |
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254 | } |
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