1 /* $OpenBSD: lxtphy.c,v 1.4 1999/12/07 22:01:31 jason Exp $ */ 2 /* $NetBSD: lxtphy.c,v 1.9.6.1 1999/04/23 15:41:43 perry Exp $ */ 3 4 /*- 5 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the NetBSD 23 * Foundation, Inc. and its contributors. 24 * 4. Neither the name of The NetBSD Foundation nor the names of its 25 * contributors may be used to endorse or promote products derived 26 * from this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 29 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 30 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 31 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 32 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 33 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 34 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 35 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 36 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 37 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 */ 40 41 /* 42 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Manuel Bouyer. 55 * 4. The name of the author may not be used to endorse or promote products 56 * derived from this software without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 61 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 62 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 63 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 64 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 65 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 66 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 67 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 /* 71 * driver for Level One's LXT-970 ethernet 10/100 PHY 72 * datasheet from www.level1.com 73 */ 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/kernel.h> 78 #include <sys/device.h> 79 #include <sys/malloc.h> 80 #include <sys/socket.h> 81 #include <sys/errno.h> 82 83 #include <net/if.h> 84 #include <net/if_media.h> 85 86 #include <dev/mii/mii.h> 87 #include <dev/mii/miivar.h> 88 #include <dev/mii/miidevs.h> 89 90 #include <dev/mii/lxtphyreg.h> 91 92 int lxtphymatch __P((struct device *, void *, void *)); 93 void lxtphyattach __P((struct device *, struct device *, void *)); 94 95 struct cfattach lxtphy_ca = { 96 sizeof(struct mii_softc), lxtphymatch, lxtphyattach 97 }; 98 99 struct cfdriver lxtphy_cd = { 100 NULL, "lxtphy", DV_DULL 101 }; 102 103 int lxtphy_service __P((struct mii_softc *, struct mii_data *, int)); 104 void lxtphy_status __P((struct mii_softc *)); 105 106 int 107 lxtphymatch(parent, match, aux) 108 struct device *parent; 109 void *match; 110 void *aux; 111 { 112 struct mii_attach_args *ma = aux; 113 114 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1 && 115 MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1_LXT970) 116 return (10); 117 118 return (0); 119 } 120 121 void 122 lxtphyattach(parent, self, aux) 123 struct device *parent, *self; 124 void *aux; 125 { 126 struct mii_softc *sc = (struct mii_softc *)self; 127 struct mii_attach_args *ma = aux; 128 struct mii_data *mii = ma->mii_data; 129 130 printf(": %s, rev. %d\n", MII_STR_xxLEVEL1_LXT970, 131 MII_REV(ma->mii_id2)); 132 133 sc->mii_inst = mii->mii_instance; 134 sc->mii_phy = ma->mii_phyno; 135 sc->mii_service = lxtphy_service; 136 sc->mii_pdata = mii; 137 138 mii_phy_reset(sc); 139 140 sc->mii_capabilities = 141 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 142 if (sc->mii_capabilities & BMSR_MEDIAMASK) 143 mii_add_media(sc); 144 } 145 146 int 147 lxtphy_service(sc, mii, cmd) 148 struct mii_softc *sc; 149 struct mii_data *mii; 150 int cmd; 151 { 152 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 153 int reg; 154 155 switch (cmd) { 156 case MII_POLLSTAT: 157 /* 158 * If we're not polling our PHY instance, just return. 159 */ 160 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 161 return (0); 162 break; 163 164 case MII_MEDIACHG: 165 /* 166 * If the media indicates a different PHY instance, 167 * isolate ourselves. 168 */ 169 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 170 reg = PHY_READ(sc, MII_BMCR); 171 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 172 return (0); 173 } 174 175 /* 176 * If the interface is not up, don't do anything. 177 */ 178 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 179 break; 180 181 switch (IFM_SUBTYPE(ife->ifm_media)) { 182 case IFM_AUTO: 183 /* 184 * If we're already in auto mode, just return. 185 */ 186 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 187 return (0); 188 (void) mii_phy_auto(sc, 1); 189 break; 190 default: 191 mii_phy_setmedia(sc); 192 } 193 break; 194 195 case MII_TICK: 196 /* 197 * If we're not currently selected, just return. 198 */ 199 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 200 return (0); 201 202 /* 203 * Only used for autonegotiation. 204 */ 205 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 206 return (0); 207 208 /* 209 * Is the interface even up? 210 */ 211 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 212 return (0); 213 214 /* 215 * Check to see if we have link. If we do, we don't 216 * need to restart the autonegotiation process. Use 217 * the LXT CSR instead of the BMSR, since the CSR's 218 * link indication is dynamic, not latched, so only 219 * one register read is required. 220 */ 221 reg = PHY_READ(sc, MII_LXTPHY_CSR); 222 if (reg & CSR_LINK) 223 return (0); 224 225 /* 226 * Only retry autonegotiation every 5 seconds. 227 */ 228 if (++sc->mii_ticks != 5) 229 return (0); 230 231 sc->mii_ticks = 0; 232 mii_phy_reset(sc); 233 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 234 return (0); 235 break; 236 237 case MII_DOWN: 238 mii_phy_down(sc); 239 return (0); 240 } 241 242 /* Update the media status. */ 243 lxtphy_status(sc); 244 245 /* Callback if something changed. */ 246 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 247 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 248 sc->mii_active = mii->mii_media_active; 249 } 250 return (0); 251 } 252 253 void 254 lxtphy_status(sc) 255 struct mii_softc *sc; 256 { 257 struct mii_data *mii = sc->mii_pdata; 258 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 259 int bmcr, csr; 260 261 mii->mii_media_status = IFM_AVALID; 262 mii->mii_media_active = IFM_ETHER; 263 264 /* 265 * Get link status from the CSR; we need to read the CSR 266 * for media type anyhow, and the link status in the CSR 267 * doens't latch, so fewer register reads are required. 268 */ 269 csr = PHY_READ(sc, MII_LXTPHY_CSR); 270 if (csr & CSR_LINK) 271 mii->mii_media_status |= IFM_ACTIVE; 272 273 bmcr = PHY_READ(sc, MII_BMCR); 274 if (bmcr & BMCR_ISO) { 275 mii->mii_media_active |= IFM_NONE; 276 mii->mii_media_status = 0; 277 return; 278 } 279 280 if (bmcr & BMCR_LOOP) 281 mii->mii_media_active |= IFM_LOOP; 282 283 if (bmcr & BMCR_AUTOEN) { 284 if ((csr & CSR_ACOMP) == 0) { 285 /* Erg, still trying, I guess... */ 286 mii->mii_media_active |= IFM_NONE; 287 return; 288 } 289 if (csr & CSR_SPEED) 290 mii->mii_media_active |= IFM_100_TX; 291 else 292 mii->mii_media_active |= IFM_10_T; 293 if (csr & CSR_DUPLEX) 294 mii->mii_media_active |= IFM_FDX; 295 } else 296 mii->mii_media_active = ife->ifm_media; 297 } 298