1 /*- 2 * Copyright (c) 2000,2001 Jonathan Chen. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions, and the following disclaimer, 10 * without modification, immediately at the beginning of the file. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in 13 * the documentation and/or other materials provided with the 14 * distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 /* 33 * Driver for the TDK 78Q2120 MII 34 * 35 * References: 36 * Datasheet for the 78Q2120 - http://www.tsc.tdk.com/lan/78q2120.pdf 37 * Most of this code stolen from ukphy.c 38 */ 39 40 /* 41 * The TDK 78Q2120 is found on some Xircom X3201 based CardBus cards, 42 * also spotted on some 3C575 cards. It's just like any other normal 43 * phy, except it does auto negotiation in a different way. 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/socket.h> 50 #include <sys/errno.h> 51 #include <sys/module.h> 52 #include <sys/bus.h> 53 54 #include <net/if.h> 55 #include <net/if_media.h> 56 57 #include <dev/mii/mii.h> 58 #include <dev/mii/miivar.h> 59 #include "miidevs.h" 60 61 #include <dev/mii/tdkphyreg.h> 62 63 #include "miibus_if.h" 64 65 static int tdkphy_probe(device_t); 66 static int tdkphy_attach(device_t); 67 68 static device_method_t tdkphy_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, tdkphy_probe), 71 DEVMETHOD(device_attach, tdkphy_attach), 72 DEVMETHOD(device_detach, mii_phy_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 { 0, 0 } 75 }; 76 77 static devclass_t tdkphy_devclass; 78 79 static driver_t tdkphy_driver = { 80 "tdkphy", 81 tdkphy_methods, 82 sizeof(struct mii_softc) 83 }; 84 85 DRIVER_MODULE(tdkphy, miibus, tdkphy_driver, tdkphy_devclass, 0, 0); 86 87 static int tdkphy_service(struct mii_softc *, struct mii_data *, int); 88 static void tdkphy_status(struct mii_softc *); 89 90 static const struct mii_phydesc tdkphys[] = { 91 MII_PHY_DESC(TDK, 78Q2120), 92 MII_PHY_END 93 }; 94 95 static int 96 tdkphy_probe(device_t dev) 97 { 98 99 return (mii_phy_dev_probe(dev, tdkphys, BUS_PROBE_DEFAULT)); 100 } 101 102 static int 103 tdkphy_attach(device_t dev) 104 { 105 struct mii_softc *sc; 106 struct mii_attach_args *ma; 107 struct mii_data *mii; 108 sc = device_get_softc(dev); 109 ma = device_get_ivars(dev); 110 sc->mii_dev = device_get_parent(dev); 111 mii = ma->mii_data; 112 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 113 114 if (bootverbose) 115 device_printf(dev, "OUI 0x%06x, model 0x%04x, rev. %d\n", 116 MII_OUI(ma->mii_id1, ma->mii_id2), 117 MII_MODEL(ma->mii_id2), MII_REV(ma->mii_id2)); 118 119 sc->mii_flags = miibus_get_flags(dev); 120 sc->mii_inst = mii->mii_instance++; 121 sc->mii_phy = ma->mii_phyno; 122 sc->mii_service = tdkphy_service; 123 sc->mii_pdata = mii; 124 125 /* 126 * Apparently, we can't do loopback on this PHY. 127 */ 128 sc->mii_flags |= MIIF_NOLOOP; 129 130 mii_phy_reset(sc); 131 132 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 133 device_printf(dev, " "); 134 mii_phy_add_media(sc); 135 printf("\n"); 136 137 MIIBUS_MEDIAINIT(sc->mii_dev); 138 return (0); 139 } 140 141 static int 142 tdkphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 143 { 144 145 switch (cmd) { 146 case MII_POLLSTAT: 147 break; 148 149 case MII_MEDIACHG: 150 /* 151 * If the interface is not up, don't do anything. 152 */ 153 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 154 break; 155 156 mii_phy_setmedia(sc); 157 break; 158 159 case MII_TICK: 160 if (mii_phy_tick(sc) == EJUSTRETURN) 161 return (0); 162 break; 163 } 164 165 /* Update the media status. */ 166 tdkphy_status(sc); 167 if (sc->mii_pdata->mii_media_active & IFM_FDX) 168 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) | BMCR_FDX); 169 else 170 PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) & ~BMCR_FDX); 171 172 /* Callback if something changed. */ 173 mii_phy_update(sc, cmd); 174 return (0); 175 } 176 177 static void 178 tdkphy_status(struct mii_softc *phy) 179 { 180 struct mii_data *mii = phy->mii_pdata; 181 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 182 int bmsr, bmcr, anlpar, diag; 183 184 mii->mii_media_status = IFM_AVALID; 185 mii->mii_media_active = IFM_ETHER; 186 187 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 188 if (bmsr & BMSR_LINK) 189 mii->mii_media_status |= IFM_ACTIVE; 190 191 bmcr = PHY_READ(phy, MII_BMCR); 192 if (bmcr & BMCR_ISO) { 193 mii->mii_media_active |= IFM_NONE; 194 mii->mii_media_status = 0; 195 return; 196 } 197 198 if (bmcr & BMCR_LOOP) 199 mii->mii_media_active |= IFM_LOOP; 200 201 if (bmcr & BMCR_AUTOEN) { 202 /* 203 * NWay autonegotiation takes the highest-order common 204 * bit of the ANAR and ANLPAR (i.e. best media advertised 205 * both by us and our link partner). 206 */ 207 if ((bmsr & BMSR_ACOMP) == 0) { 208 /* Erg, still trying, I guess... */ 209 mii->mii_media_active |= IFM_NONE; 210 return; 211 } 212 213 anlpar = PHY_READ(phy, MII_ANAR) & PHY_READ(phy, MII_ANLPAR); 214 /* 215 * ANLPAR doesn't get set on my card, but we check it anyway, 216 * since it is mentioned in the 78Q2120 specs. 217 */ 218 if (anlpar & ANLPAR_TX_FD) 219 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 220 else if (anlpar & ANLPAR_T4) 221 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 222 else if (anlpar & ANLPAR_TX) 223 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 224 else if (anlpar & ANLPAR_10_FD) 225 mii->mii_media_active |= IFM_10_T|IFM_FDX; 226 else if (anlpar & ANLPAR_10) 227 mii->mii_media_active |= IFM_10_T|IFM_HDX; 228 else { 229 /* 230 * ANLPAR isn't set, which leaves two possibilities: 231 * 1) Auto negotiation failed 232 * 2) Auto negotiation completed, but the card forgot 233 * to set ANLPAR. 234 * So we check the MII_DIAG(18) register... 235 */ 236 diag = PHY_READ(phy, MII_DIAG); 237 if (diag & DIAG_NEGFAIL) /* assume 10baseT if no neg */ 238 mii->mii_media_active |= IFM_10_T|IFM_HDX; 239 else { 240 if (diag & DIAG_DUPLEX) 241 mii->mii_media_active |= IFM_FDX; 242 else 243 mii->mii_media_active |= IFM_HDX; 244 if (diag & DIAG_RATE_100) 245 mii->mii_media_active |= IFM_100_TX; 246 else 247 mii->mii_media_active |= IFM_10_T; 248 } 249 } 250 } else 251 mii->mii_media_active = ife->ifm_media; 252 } 253