lxtphy.c revision 1.17
1 /* $NetBSD: lxtphy.c,v 1.17 2000/02/02 17:09:44 thorpej 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, mii_phy_detach, 96 mii_phy_activate 97 }; 98 99 int lxtphy_service __P((struct mii_softc *, struct mii_data *, int)); 100 void lxtphy_status __P((struct mii_softc *)); 101 102 int 103 lxtphymatch(parent, match, aux) 104 struct device *parent; 105 struct cfdata *match; 106 void *aux; 107 { 108 struct mii_attach_args *ma = aux; 109 110 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1 && 111 MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1_LXT970) 112 return (10); 113 114 return (0); 115 } 116 117 void 118 lxtphyattach(parent, self, aux) 119 struct device *parent, *self; 120 void *aux; 121 { 122 struct mii_softc *sc = (struct mii_softc *)self; 123 struct mii_attach_args *ma = aux; 124 struct mii_data *mii = ma->mii_data; 125 126 printf(": %s, rev. %d\n", MII_STR_xxLEVEL1_LXT970, 127 MII_REV(ma->mii_id2)); 128 129 sc->mii_inst = mii->mii_instance; 130 sc->mii_phy = ma->mii_phyno; 131 sc->mii_service = lxtphy_service; 132 sc->mii_pdata = mii; 133 sc->mii_flags = mii->mii_flags; 134 135 mii_phy_reset(sc); 136 137 sc->mii_capabilities = 138 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 139 printf("%s: ", sc->mii_dev.dv_xname); 140 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 141 printf("no media present"); 142 else 143 mii_phy_add_media(sc); 144 printf("\n"); 145 } 146 147 int 148 lxtphy_service(sc, mii, cmd) 149 struct mii_softc *sc; 150 struct mii_data *mii; 151 int cmd; 152 { 153 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 154 int reg; 155 156 if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0) 157 return (ENXIO); 158 159 switch (cmd) { 160 case MII_POLLSTAT: 161 /* 162 * If we're not polling our PHY instance, just return. 163 */ 164 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 165 return (0); 166 break; 167 168 case MII_MEDIACHG: 169 /* 170 * If the media indicates a different PHY instance, 171 * isolate ourselves. 172 */ 173 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 174 reg = PHY_READ(sc, MII_BMCR); 175 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 176 return (0); 177 } 178 179 /* 180 * If the interface is not up, don't do anything. 181 */ 182 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 183 break; 184 185 switch (IFM_SUBTYPE(ife->ifm_media)) { 186 case IFM_AUTO: 187 /* 188 * If we're already in auto mode, just return. 189 */ 190 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 191 return (0); 192 (void) mii_phy_auto(sc, 1); 193 break; 194 default: 195 mii_phy_setmedia(sc); 196 } 197 break; 198 199 case MII_TICK: 200 /* 201 * If we're not currently selected, just return. 202 */ 203 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 204 return (0); 205 206 /* 207 * Only used for autonegotiation. 208 */ 209 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 210 return (0); 211 212 /* 213 * Is the interface even up? 214 */ 215 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 216 return (0); 217 218 /* 219 * Check to see if we have link. If we do, we don't 220 * need to restart the autonegotiation process. Use 221 * the LXT CSR instead of the BMSR, since the CSR's 222 * link indication is dynamic, not latched, so only 223 * one register read is required. 224 */ 225 reg = PHY_READ(sc, MII_LXTPHY_CSR); 226 if (reg & CSR_LINK) 227 return (0); 228 229 /* 230 * Only retry autonegotiation every 5 seconds. 231 */ 232 if (++sc->mii_ticks != 5) 233 return (0); 234 235 sc->mii_ticks = 0; 236 mii_phy_reset(sc); 237 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 238 return (0); 239 break; 240 241 case MII_DOWN: 242 mii_phy_down(sc); 243 return (0); 244 } 245 246 /* Update the media status. */ 247 lxtphy_status(sc); 248 249 /* Callback if something changed. */ 250 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 251 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 252 sc->mii_active = mii->mii_media_active; 253 } 254 return (0); 255 } 256 257 void 258 lxtphy_status(sc) 259 struct mii_softc *sc; 260 { 261 struct mii_data *mii = sc->mii_pdata; 262 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 263 int bmcr, bmsr, csr; 264 265 mii->mii_media_status = IFM_AVALID; 266 mii->mii_media_active = IFM_ETHER; 267 268 /* 269 * Get link status from the CSR; we need to read the CSR 270 * for media type anyhow, and the link status in the CSR 271 * doens't latch, so fewer register reads are required. 272 */ 273 csr = PHY_READ(sc, MII_LXTPHY_CSR); 274 if (csr & CSR_LINK) 275 mii->mii_media_status |= IFM_ACTIVE; 276 277 bmcr = PHY_READ(sc, MII_BMCR); 278 if (bmcr & BMCR_ISO) { 279 mii->mii_media_active |= IFM_NONE; 280 mii->mii_media_status = 0; 281 return; 282 } 283 284 if (bmcr & BMCR_LOOP) 285 mii->mii_media_active |= IFM_LOOP; 286 287 if (bmcr & BMCR_AUTOEN) { 288 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 289 if ((bmsr & BMSR_ACOMP) == 0) { 290 /* Erg, still trying, I guess... */ 291 mii->mii_media_active |= IFM_NONE; 292 return; 293 } 294 if (csr & CSR_SPEED) 295 mii->mii_media_active |= IFM_100_TX; 296 else 297 mii->mii_media_active |= IFM_10_T; 298 if (csr & CSR_DUPLEX) 299 mii->mii_media_active |= IFM_FDX; 300 } else 301 mii->mii_media_active = ife->ifm_media; 302 } 303
Indexes created Wed Oct 22 13:09:56 GMT 2025