1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1997, 1998, 1999 5 * Bill Paul <wpaul@ctr.columbia.edu>. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 /* 37 * driver for RealTek 8139 internal PHYs 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/module.h> 44 #include <sys/socket.h> 45 #include <sys/bus.h> 46 #include <sys/taskqueue.h> /* XXXGL: if_rlreg.h contamination */ 47 48 #include <net/if.h> 49 #include <net/if_arp.h> 50 #include <net/if_media.h> 51 52 #include <dev/mii/mii.h> 53 #include <dev/mii/miivar.h> 54 #include "miidevs.h" 55 56 #include <machine/bus.h> 57 #include <dev/rl/if_rlreg.h> 58 59 #include "miibus_if.h" 60 61 static int rlphy_probe(device_t); 62 static int rlphy_attach(device_t); 63 64 static device_method_t rlphy_methods[] = { 65 /* device interface */ 66 DEVMETHOD(device_probe, rlphy_probe), 67 DEVMETHOD(device_attach, rlphy_attach), 68 DEVMETHOD(device_detach, mii_phy_detach), 69 DEVMETHOD(device_shutdown, bus_generic_shutdown), 70 DEVMETHOD_END 71 }; 72 73 static driver_t rlphy_driver = { 74 "rlphy", 75 rlphy_methods, 76 sizeof(struct mii_softc) 77 }; 78 79 DRIVER_MODULE(rlphy, miibus, rlphy_driver, 0, 0); 80 81 static int rlphy_service(struct mii_softc *, struct mii_data *, int); 82 static void rlphy_status(struct mii_softc *); 83 84 /* 85 * RealTek internal PHYs don't have vendor/device ID registers; 86 * re(4) and rl(4) fake up a return value of all zeros. 87 */ 88 static const struct mii_phydesc rlintphys[] = { 89 { 0, 0, "RealTek internal media interface" }, 90 MII_PHY_END 91 }; 92 93 static const struct mii_phydesc rlphys[] = { 94 MII_PHY_DESC(yyREALTEK, RTL8201L), 95 MII_PHY_DESC(REALTEK, RTL8201E), 96 MII_PHY_DESC(xxICPLUS, IP101), 97 MII_PHY_END 98 }; 99 100 static const struct mii_phy_funcs rlphy_funcs = { 101 rlphy_service, 102 rlphy_status, 103 mii_phy_reset 104 }; 105 106 static int 107 rlphy_probe(device_t dev) 108 { 109 int rv; 110 111 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT); 112 if (rv <= 0) 113 return (rv); 114 115 if (mii_dev_mac_match(dev, "rl") || mii_dev_mac_match(dev, "re")) 116 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT)); 117 return (ENXIO); 118 } 119 120 static int 121 rlphy_attach(device_t dev) 122 { 123 124 /* 125 * The RealTek PHY can never be isolated. 126 */ 127 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 128 &rlphy_funcs, 1); 129 return (0); 130 } 131 132 static int 133 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 134 { 135 136 switch (cmd) { 137 case MII_POLLSTAT: 138 break; 139 140 case MII_MEDIACHG: 141 mii_phy_setmedia(sc); 142 break; 143 144 case MII_TICK: 145 /* 146 * The RealTek PHY's autonegotiation doesn't need to be 147 * kicked; it continues in the background. 148 */ 149 break; 150 } 151 152 /* Update the media status. */ 153 PHY_STATUS(sc); 154 155 /* Callback if something changed. */ 156 mii_phy_update(sc, cmd); 157 return (0); 158 } 159 160 static void 161 rlphy_status(struct mii_softc *phy) 162 { 163 struct mii_data *mii = phy->mii_pdata; 164 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 165 int bmsr, bmcr, anlpar; 166 167 mii->mii_media_status = IFM_AVALID; 168 mii->mii_media_active = IFM_ETHER; 169 170 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 171 if (bmsr & BMSR_LINK) 172 mii->mii_media_status |= IFM_ACTIVE; 173 174 bmcr = PHY_READ(phy, MII_BMCR); 175 if (bmcr & BMCR_ISO) { 176 mii->mii_media_active |= IFM_NONE; 177 mii->mii_media_status = 0; 178 return; 179 } 180 181 if (bmcr & BMCR_LOOP) 182 mii->mii_media_active |= IFM_LOOP; 183 184 if (bmcr & BMCR_AUTOEN) { 185 /* 186 * NWay autonegotiation takes the highest-order common 187 * bit of the ANAR and ANLPAR (i.e. best media advertised 188 * both by us and our link partner). 189 */ 190 if ((bmsr & BMSR_ACOMP) == 0) { 191 /* Erg, still trying, I guess... */ 192 mii->mii_media_active |= IFM_NONE; 193 return; 194 } 195 196 if ((anlpar = PHY_READ(phy, MII_ANAR) & 197 PHY_READ(phy, MII_ANLPAR))) { 198 if (anlpar & ANLPAR_TX_FD) 199 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 200 else if (anlpar & ANLPAR_T4) 201 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 202 else if (anlpar & ANLPAR_TX) 203 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 204 else if (anlpar & ANLPAR_10_FD) 205 mii->mii_media_active |= IFM_10_T|IFM_FDX; 206 else if (anlpar & ANLPAR_10) 207 mii->mii_media_active |= IFM_10_T|IFM_HDX; 208 else 209 mii->mii_media_active |= IFM_NONE; 210 if ((mii->mii_media_active & IFM_FDX) != 0) 211 mii->mii_media_active |= 212 mii_phy_flowstatus(phy); 213 return; 214 } 215 /* 216 * If the other side doesn't support NWAY, then the 217 * best we can do is determine if we have a 10Mbps or 218 * 100Mbps link. There's no way to know if the link 219 * is full or half duplex, so we default to half duplex 220 * and hope that the user is clever enough to manually 221 * change the media settings if we're wrong. 222 */ 223 224 /* 225 * The RealTek PHY supports non-NWAY link speed 226 * detection, however it does not report the link 227 * detection results via the ANLPAR or BMSR registers. 228 * (What? RealTek doesn't do things the way everyone 229 * else does? I'm just shocked, shocked I tell you.) 230 * To determine the link speed, we have to do one 231 * of two things: 232 * 233 * - If this is a standalone RealTek RTL8201(L) or 234 * workalike PHY, we can determine the link speed by 235 * testing bit 0 in the magic, vendor-specific register 236 * at offset 0x19. 237 * 238 * - If this is a RealTek MAC with integrated PHY, we 239 * can test the 'SPEED10' bit of the MAC's media status 240 * register. 241 */ 242 if (!(phy->mii_mpd_model == 0 && phy->mii_mpd_rev == 0)) { 243 if (PHY_READ(phy, 0x0019) & 0x01) 244 mii->mii_media_active |= IFM_100_TX; 245 else 246 mii->mii_media_active |= IFM_10_T; 247 } else { 248 if (PHY_READ(phy, RL_MEDIASTAT) & 249 RL_MEDIASTAT_SPEED10) 250 mii->mii_media_active |= IFM_10_T; 251 else 252 mii->mii_media_active |= IFM_100_TX; 253 } 254 mii->mii_media_active |= IFM_HDX; 255 } else 256 mii->mii_media_active = ife->ifm_media; 257 } 258