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 __FBSDID("$FreeBSD$"); 37 38 /* 39 * driver for RealTek 8139 internal PHYs 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/module.h> 46 #include <sys/socket.h> 47 #include <sys/bus.h> 48 #include <sys/taskqueue.h> /* XXXGL: if_rlreg.h contamination */ 49 50 #include <net/if.h> 51 #include <net/if_arp.h> 52 #include <net/if_media.h> 53 54 #include <dev/mii/mii.h> 55 #include <dev/mii/miivar.h> 56 #include "miidevs.h" 57 58 #include <machine/bus.h> 59 #include <dev/rl/if_rlreg.h> 60 61 #include "miibus_if.h" 62 63 static int rlphy_probe(device_t); 64 static int rlphy_attach(device_t); 65 66 static device_method_t rlphy_methods[] = { 67 /* device interface */ 68 DEVMETHOD(device_probe, rlphy_probe), 69 DEVMETHOD(device_attach, rlphy_attach), 70 DEVMETHOD(device_detach, mii_phy_detach), 71 DEVMETHOD(device_shutdown, bus_generic_shutdown), 72 DEVMETHOD_END 73 }; 74 75 static driver_t rlphy_driver = { 76 "rlphy", 77 rlphy_methods, 78 sizeof(struct mii_softc) 79 }; 80 81 DRIVER_MODULE(rlphy, miibus, rlphy_driver, 0, 0); 82 83 static int rlphy_service(struct mii_softc *, struct mii_data *, int); 84 static void rlphy_status(struct mii_softc *); 85 86 /* 87 * RealTek internal PHYs don't have vendor/device ID registers; 88 * re(4) and rl(4) fake up a return value of all zeros. 89 */ 90 static const struct mii_phydesc rlintphys[] = { 91 { 0, 0, "RealTek internal media interface" }, 92 MII_PHY_END 93 }; 94 95 static const struct mii_phydesc rlphys[] = { 96 MII_PHY_DESC(yyREALTEK, RTL8201L), 97 MII_PHY_DESC(REALTEK, RTL8201E), 98 MII_PHY_DESC(xxICPLUS, IP101), 99 MII_PHY_END 100 }; 101 102 static const struct mii_phy_funcs rlphy_funcs = { 103 rlphy_service, 104 rlphy_status, 105 mii_phy_reset 106 }; 107 108 static int 109 rlphy_probe(device_t dev) 110 { 111 int rv; 112 113 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT); 114 if (rv <= 0) 115 return (rv); 116 117 if (mii_dev_mac_match(dev, "rl") || mii_dev_mac_match(dev, "re")) 118 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT)); 119 return (ENXIO); 120 } 121 122 static int 123 rlphy_attach(device_t dev) 124 { 125 126 /* 127 * The RealTek PHY can never be isolated. 128 */ 129 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 130 &rlphy_funcs, 1); 131 return (0); 132 } 133 134 static int 135 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 136 { 137 138 switch (cmd) { 139 case MII_POLLSTAT: 140 break; 141 142 case MII_MEDIACHG: 143 mii_phy_setmedia(sc); 144 break; 145 146 case MII_TICK: 147 /* 148 * The RealTek PHY's autonegotiation doesn't need to be 149 * kicked; it continues in the background. 150 */ 151 break; 152 } 153 154 /* Update the media status. */ 155 PHY_STATUS(sc); 156 157 /* Callback if something changed. */ 158 mii_phy_update(sc, cmd); 159 return (0); 160 } 161 162 static void 163 rlphy_status(struct mii_softc *phy) 164 { 165 struct mii_data *mii = phy->mii_pdata; 166 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 167 int bmsr, bmcr, anlpar; 168 169 mii->mii_media_status = IFM_AVALID; 170 mii->mii_media_active = IFM_ETHER; 171 172 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 173 if (bmsr & BMSR_LINK) 174 mii->mii_media_status |= IFM_ACTIVE; 175 176 bmcr = PHY_READ(phy, MII_BMCR); 177 if (bmcr & BMCR_ISO) { 178 mii->mii_media_active |= IFM_NONE; 179 mii->mii_media_status = 0; 180 return; 181 } 182 183 if (bmcr & BMCR_LOOP) 184 mii->mii_media_active |= IFM_LOOP; 185 186 if (bmcr & BMCR_AUTOEN) { 187 /* 188 * NWay autonegotiation takes the highest-order common 189 * bit of the ANAR and ANLPAR (i.e. best media advertised 190 * both by us and our link partner). 191 */ 192 if ((bmsr & BMSR_ACOMP) == 0) { 193 /* Erg, still trying, I guess... */ 194 mii->mii_media_active |= IFM_NONE; 195 return; 196 } 197 198 if ((anlpar = PHY_READ(phy, MII_ANAR) & 199 PHY_READ(phy, MII_ANLPAR))) { 200 if (anlpar & ANLPAR_TX_FD) 201 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 202 else if (anlpar & ANLPAR_T4) 203 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 204 else if (anlpar & ANLPAR_TX) 205 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 206 else if (anlpar & ANLPAR_10_FD) 207 mii->mii_media_active |= IFM_10_T|IFM_FDX; 208 else if (anlpar & ANLPAR_10) 209 mii->mii_media_active |= IFM_10_T|IFM_HDX; 210 else 211 mii->mii_media_active |= IFM_NONE; 212 if ((mii->mii_media_active & IFM_FDX) != 0) 213 mii->mii_media_active |= 214 mii_phy_flowstatus(phy); 215 return; 216 } 217 /* 218 * If the other side doesn't support NWAY, then the 219 * best we can do is determine if we have a 10Mbps or 220 * 100Mbps link. There's no way to know if the link 221 * is full or half duplex, so we default to half duplex 222 * and hope that the user is clever enough to manually 223 * change the media settings if we're wrong. 224 */ 225 226 /* 227 * The RealTek PHY supports non-NWAY link speed 228 * detection, however it does not report the link 229 * detection results via the ANLPAR or BMSR registers. 230 * (What? RealTek doesn't do things the way everyone 231 * else does? I'm just shocked, shocked I tell you.) 232 * To determine the link speed, we have to do one 233 * of two things: 234 * 235 * - If this is a standalone RealTek RTL8201(L) or 236 * workalike PHY, we can determine the link speed by 237 * testing bit 0 in the magic, vendor-specific register 238 * at offset 0x19. 239 * 240 * - If this is a RealTek MAC with integrated PHY, we 241 * can test the 'SPEED10' bit of the MAC's media status 242 * register. 243 */ 244 if (!(phy->mii_mpd_model == 0 && phy->mii_mpd_rev == 0)) { 245 if (PHY_READ(phy, 0x0019) & 0x01) 246 mii->mii_media_active |= IFM_100_TX; 247 else 248 mii->mii_media_active |= IFM_10_T; 249 } else { 250 if (PHY_READ(phy, RL_MEDIASTAT) & 251 RL_MEDIASTAT_SPEED10) 252 mii->mii_media_active |= IFM_10_T; 253 else 254 mii->mii_media_active |= IFM_100_TX; 255 } 256 mii->mii_media_active |= IFM_HDX; 257 } else 258 mii->mii_media_active = ife->ifm_media; 259 } 260