lxtphy.c revision 1.11.8.1
1 /* $NetBSD: lxtphy.c,v 1.11.8.1 1999/12/27 18:35:12 wrstuden Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Manuel Bouyer. 54 * 4. The name of the author may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 61 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 62 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 63 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 64 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 65 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 66 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 /* 70 * driver for Level One's LXT-970 ethernet 10/100 PHY 71 * datasheet from www.level1.com 72 */ 73 74 #include <sys/param.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/device.h> 78 #include <sys/malloc.h> 79 #include <sys/socket.h> 80 #include <sys/errno.h> 81 82 #include <net/if.h> 83 #include <net/if_media.h> 84 85 #include <dev/mii/mii.h> 86 #include <dev/mii/miivar.h> 87 #include <dev/mii/miidevs.h> 88 89 #include <dev/mii/lxtphyreg.h> 90 91 int lxtphymatch __P((struct device *, struct cfdata *, void *)); 92 void lxtphyattach __P((struct device *, struct device *, void *)); 93 94 struct cfattach lxtphy_ca = { 95 sizeof(struct mii_softc), lxtphymatch, lxtphyattach 96 }; 97 98 int lxtphy_service __P((struct mii_softc *, struct mii_data *, int)); 99 void lxtphy_status __P((struct mii_softc *)); 100 101 int 102 lxtphymatch(parent, match, aux) 103 struct device *parent; 104 struct cfdata *match; 105 void *aux; 106 { 107 struct mii_attach_args *ma = aux; 108 109 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1 && 110 MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1_LXT970) 111 return (10); 112 113 return (0); 114 } 115 116 void 117 lxtphyattach(parent, self, aux) 118 struct device *parent, *self; 119 void *aux; 120 { 121 struct mii_softc *sc = (struct mii_softc *)self; 122 struct mii_attach_args *ma = aux; 123 struct mii_data *mii = ma->mii_data; 124 125 printf(": %s, rev. %d\n", MII_STR_xxLEVEL1_LXT970, 126 MII_REV(ma->mii_id2)); 127 128 sc->mii_inst = mii->mii_instance; 129 sc->mii_phy = ma->mii_phyno; 130 sc->mii_service = lxtphy_service; 131 sc->mii_pdata = mii; 132 133 mii_phy_reset(sc); 134 135 sc->mii_capabilities = 136 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 137 printf("%s: ", sc->mii_dev.dv_xname); 138 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 139 printf("no media present"); 140 else 141 mii_add_media(sc); 142 printf("\n"); 143 } 144 145 int 146 lxtphy_service(sc, mii, cmd) 147 struct mii_softc *sc; 148 struct mii_data *mii; 149 int cmd; 150 { 151 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 152 int reg; 153 154 switch (cmd) { 155 case MII_POLLSTAT: 156 /* 157 * If we're not polling our PHY instance, just return. 158 */ 159 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 160 return (0); 161 break; 162 163 case MII_MEDIACHG: 164 /* 165 * If the media indicates a different PHY instance, 166 * isolate ourselves. 167 */ 168 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 169 reg = PHY_READ(sc, MII_BMCR); 170 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 171 return (0); 172 } 173 174 /* 175 * If the interface is not up, don't do anything. 176 */ 177 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 178 break; 179 180 switch (IFM_SUBTYPE(ife->ifm_media)) { 181 case IFM_AUTO: 182 /* 183 * If we're already in auto mode, just return. 184 */ 185 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 186 return (0); 187 (void) mii_phy_auto(sc, 1); 188 break; 189 default: 190 mii_phy_setmedia(sc); 191 } 192 break; 193 194 case MII_TICK: 195 /* 196 * If we're not currently selected, just return. 197 */ 198 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 199 return (0); 200 201 /* 202 * Only used for autonegotiation. 203 */ 204 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 205 return (0); 206 207 /* 208 * Is the interface even up? 209 */ 210 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 211 return (0); 212 213 /* 214 * Check to see if we have link. If we do, we don't 215 * need to restart the autonegotiation process. Use 216 * the LXT CSR instead of the BMSR, since the CSR's 217 * link indication is dynamic, not latched, so only 218 * one register read is required. 219 */ 220 reg = PHY_READ(sc, MII_LXTPHY_CSR); 221 if (reg & CSR_LINK) 222 return (0); 223 224 /* 225 * Only retry autonegotiation every 5 seconds. 226 */ 227 if (++sc->mii_ticks != 5) 228 return (0); 229 230 sc->mii_ticks = 0; 231 mii_phy_reset(sc); 232 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 233 return (0); 234 break; 235 236 case MII_DOWN: 237 mii_phy_down(sc); 238 return (0); 239 } 240 241 /* Update the media status. */ 242 lxtphy_status(sc); 243 244 /* Callback if something changed. */ 245 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 246 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 247 sc->mii_active = mii->mii_media_active; 248 } 249 return (0); 250 } 251 252 void 253 lxtphy_status(sc) 254 struct mii_softc *sc; 255 { 256 struct mii_data *mii = sc->mii_pdata; 257 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 258 int bmcr, bmsr, csr; 259 260 mii->mii_media_status = IFM_AVALID; 261 mii->mii_media_active = IFM_ETHER; 262 263 /* 264 * Get link status from the CSR; we need to read the CSR 265 * for media type anyhow, and the link status in the CSR 266 * doens't latch, so fewer register reads are required. 267 */ 268 csr = PHY_READ(sc, MII_LXTPHY_CSR); 269 if (csr & CSR_LINK) 270 mii->mii_media_status |= IFM_ACTIVE; 271 272 bmcr = PHY_READ(sc, MII_BMCR); 273 if (bmcr & BMCR_ISO) { 274 mii->mii_media_active |= IFM_NONE; 275 mii->mii_media_status = 0; 276 return; 277 } 278 279 if (bmcr & BMCR_LOOP) 280 mii->mii_media_active |= IFM_LOOP; 281 282 if (bmcr & BMCR_AUTOEN) { 283 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 284 if ((bmsr & BMSR_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
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