lxtphy.c revision 1.8
1 /* $NetBSD: lxtphy.c,v 1.8 1998/11/05 04:01:32 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 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 81 #include <net/if.h> 82 #include <net/if_media.h> 83 84 #include <dev/mii/mii.h> 85 #include <dev/mii/miivar.h> 86 #include <dev/mii/miidevs.h> 87 88 #include <dev/mii/lxtphyreg.h> 89 90 int lxtphymatch __P((struct device *, struct cfdata *, void *)); 91 void lxtphyattach __P((struct device *, struct device *, void *)); 92 93 struct cfattach lxtphy_ca = { 94 sizeof(struct mii_softc), lxtphymatch, lxtphyattach 95 }; 96 97 int lxtphy_service __P((struct mii_softc *, struct mii_data *, int)); 98 void lxtphy_status __P((struct mii_softc *)); 99 100 int 101 lxtphymatch(parent, match, aux) 102 struct device *parent; 103 struct cfdata *match; 104 void *aux; 105 { 106 struct mii_attach_args *ma = aux; 107 108 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_LEVEL1 && 109 MII_MODEL(ma->mii_id2) == MII_MODEL_LEVEL1_LXT970) 110 return (10); 111 112 return (0); 113 } 114 115 void 116 lxtphyattach(parent, self, aux) 117 struct device *parent, *self; 118 void *aux; 119 { 120 struct mii_softc *sc = (struct mii_softc *)self; 121 struct mii_attach_args *ma = aux; 122 struct mii_data *mii = ma->mii_data; 123 124 printf(": %s, rev. %d\n", MII_STR_LEVEL1_LXT970, 125 MII_REV(ma->mii_id2)); 126 127 sc->mii_inst = mii->mii_instance; 128 sc->mii_phy = ma->mii_phyno; 129 sc->mii_service = lxtphy_service; 130 sc->mii_pdata = mii; 131 132 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 133 134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 135 BMCR_ISO); 136 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 137 BMCR_LOOP|BMCR_S100); 138 139 mii_phy_reset(sc); 140 141 sc->mii_capabilities = 142 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 143 printf("%s: ", sc->mii_dev.dv_xname); 144 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 145 printf("no media present"); 146 else 147 mii_add_media(mii, sc->mii_capabilities, 148 sc->mii_inst); 149 printf("\n"); 150 #undef ADD 151 } 152 153 int 154 lxtphy_service(sc, mii, cmd) 155 struct mii_softc *sc; 156 struct mii_data *mii; 157 int cmd; 158 { 159 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 160 int reg; 161 162 switch (cmd) { 163 case MII_POLLSTAT: 164 /* 165 * If we're not polling our PHY instance, just return. 166 */ 167 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 168 return (0); 169 break; 170 171 case MII_MEDIACHG: 172 /* 173 * If the media indicates a different PHY instance, 174 * isolate ourselves. 175 */ 176 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 177 reg = PHY_READ(sc, MII_BMCR); 178 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 179 return (0); 180 } 181 182 /* 183 * If the interface is not up, don't do anything. 184 */ 185 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 186 break; 187 188 switch (IFM_SUBTYPE(ife->ifm_media)) { 189 case IFM_AUTO: 190 /* 191 * If we're already in auto mode, just return. 192 */ 193 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 194 return (0); 195 (void) mii_phy_auto(sc); 196 break; 197 case IFM_100_T4: 198 /* 199 * XXX Not supported as a manual setting right now. 200 */ 201 return (EINVAL); 202 default: 203 /* 204 * BMCR data is stored in the ifmedia entry. 205 */ 206 PHY_WRITE(sc, MII_ANAR, 207 mii_anar(ife->ifm_media)); 208 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 209 } 210 break; 211 212 case MII_TICK: 213 /* 214 * If we're not currently selected, just return. 215 */ 216 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 217 return (0); 218 219 /* 220 * Only used for autonegotiation. 221 */ 222 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 223 return (0); 224 225 /* 226 * Is the interface even up? 227 */ 228 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 229 return (0); 230 231 /* 232 * Check to see if we have link. If we do, we don't 233 * need to restart the autonegotiation process. Use 234 * the LXT CSR instead of the BMSR, since the CSR's 235 * link indication is dynamic, not latched, so only 236 * one register read is required. 237 */ 238 reg = PHY_READ(sc, MII_LXTPHY_CSR); 239 if (reg & CSR_LINK) 240 return (0); 241 242 /* 243 * Only retry autonegotiation every 5 seconds. 244 */ 245 if (++sc->mii_ticks != 5) 246 return (0); 247 248 sc->mii_ticks = 0; 249 mii_phy_reset(sc); 250 (void) mii_phy_auto(sc); 251 break; 252 } 253 254 /* Update the media status. */ 255 lxtphy_status(sc); 256 257 /* Callback if something changed. */ 258 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 259 (*mii->mii_statchg)(sc->mii_dev.dv_parent); 260 sc->mii_active = mii->mii_media_active; 261 } 262 return (0); 263 } 264 265 void 266 lxtphy_status(sc) 267 struct mii_softc *sc; 268 { 269 struct mii_data *mii = sc->mii_pdata; 270 int bmcr, csr; 271 272 mii->mii_media_status = IFM_AVALID; 273 mii->mii_media_active = IFM_ETHER; 274 275 /* 276 * Get link status from the CSR; we need to read the CSR 277 * for media type anyhow, and the link status in the CSR 278 * doens't latch, so fewer register reads are required. 279 */ 280 csr = PHY_READ(sc, MII_LXTPHY_CSR); 281 if (csr & CSR_LINK) 282 mii->mii_media_status |= IFM_ACTIVE; 283 284 bmcr = PHY_READ(sc, MII_BMCR); 285 if (bmcr & BMCR_ISO) { 286 mii->mii_media_active |= IFM_NONE; 287 mii->mii_media_status = 0; 288 return; 289 } 290 291 if (bmcr & BMCR_LOOP) 292 mii->mii_media_active |= IFM_LOOP; 293 294 if (bmcr & BMCR_AUTOEN) { 295 if ((csr & CSR_ACOMP) == 0) { 296 /* Erg, still trying, I guess... */ 297 mii->mii_media_active |= IFM_NONE; 298 return; 299 } 300 if (csr & CSR_SPEED) 301 mii->mii_media_active |= IFM_100_TX; 302 else 303 mii->mii_media_active |= IFM_10_T; 304 if (csr & CSR_DUPLEX) 305 mii->mii_media_active |= IFM_FDX; 306 } else { 307 if (bmcr & BMCR_S100) 308 mii->mii_media_active |= IFM_100_TX; 309 else 310 mii->mii_media_active |= IFM_10_T; 311 if (bmcr & BMCR_FDX) 312 mii->mii_media_active |= IFM_FDX; 313 } 314 } 315
Indexes created Wed Oct 22 06:10:02 GMT 2025