1 /* $NetBSD: lxtphy.c,v 1.39 2006/10/12 01:31:25 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 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/cdefs.h> 75 __KERNEL_RCSID(0, "$NetBSD: lxtphy.c,v 1.39 2006/10/12 01:31:25 christos Exp $"); 76 77 #include <sys/param.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/device.h> 81 #include <sys/socket.h> 82 #include <sys/errno.h> 83 84 #include <net/if.h> 85 #include <net/if_media.h> 86 87 #include <dev/mii/mii.h> 88 #include <dev/mii/miivar.h> 89 #include <dev/mii/miidevs.h> 90 91 #include <dev/mii/lxtphyreg.h> 92 93 static int lxtphymatch(struct device *, struct cfdata *, void *); 94 static void lxtphyattach(struct device *, struct device *, void *); 95 96 CFATTACH_DECL(lxtphy, sizeof(struct mii_softc), 97 lxtphymatch, lxtphyattach, mii_phy_detach, mii_phy_activate); 98 99 static int lxtphy_service(struct mii_softc *, struct mii_data *, int); 100 static void lxtphy_status(struct mii_softc *); 101 static void lxtphy_reset(struct mii_softc *); 102 103 static void lxtphy_set_tp(struct mii_softc *); 104 static void lxtphy_set_fx(struct mii_softc *); 105 106 static const struct mii_phy_funcs lxtphy_funcs = { 107 lxtphy_service, lxtphy_status, lxtphy_reset, 108 }; 109 110 static const struct mii_phy_funcs lxtphy971_funcs = { 111 lxtphy_service, ukphy_status, lxtphy_reset, 112 }; 113 114 static const struct mii_phydesc lxtphys[] = { 115 { MII_OUI_xxLEVEL1, MII_MODEL_xxLEVEL1_LXT970, 116 MII_STR_xxLEVEL1_LXT970 }, 117 118 { MII_OUI_LEVEL1, MII_MODEL_LEVEL1_LXT971, 119 MII_STR_LEVEL1_LXT971 }, 120 121 { 0, 0, 122 NULL }, 123 }; 124 125 static int 126 lxtphymatch(struct device *parent __unused, struct cfdata *match __unused, 127 void *aux) 128 { 129 struct mii_attach_args *ma = aux; 130 131 if (mii_phy_match(ma, lxtphys) != NULL) 132 return (10); 133 134 return (0); 135 } 136 137 static void 138 lxtphyattach(struct device *parent __unused, struct device *self, void *aux) 139 { 140 struct mii_softc *sc = device_private(self); 141 struct mii_attach_args *ma = aux; 142 struct mii_data *mii = ma->mii_data; 143 const struct mii_phydesc *mpd; 144 145 mpd = mii_phy_match(ma, lxtphys); 146 aprint_naive(": Media interface\n"); 147 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 148 149 sc->mii_inst = mii->mii_instance; 150 sc->mii_phy = ma->mii_phyno; 151 if (mpd->mpd_model == MII_MODEL_LEVEL1_LXT971) 152 sc->mii_funcs = &lxtphy971_funcs; 153 else 154 sc->mii_funcs = &lxtphy_funcs; 155 sc->mii_pdata = mii; 156 sc->mii_flags = ma->mii_flags; 157 sc->mii_anegticks = 5; 158 159 PHY_RESET(sc); 160 161 sc->mii_capabilities = 162 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 163 aprint_normal("%s: ", sc->mii_dev.dv_xname); 164 165 if (sc->mii_flags & MIIF_HAVEFIBER) { 166 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 167 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst), 168 MII_MEDIA_100_TX); 169 aprint_normal("100baseFX, "); 170 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst), 171 MII_MEDIA_100_TX_FDX); 172 aprint_normal("100baseFX-FDX, "); 173 #undef ADD 174 } 175 176 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 177 aprint_error("no media present"); 178 else 179 mii_phy_add_media(sc); 180 aprint_normal("\n"); 181 } 182 183 static int 184 lxtphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 185 { 186 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 187 int reg; 188 189 if (!device_is_active(&sc->mii_dev)) 190 return (ENXIO); 191 192 switch (cmd) { 193 case MII_POLLSTAT: 194 /* 195 * If we're not polling our PHY instance, just return. 196 */ 197 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 198 return (0); 199 break; 200 201 case MII_MEDIACHG: 202 /* 203 * If the media indicates a different PHY instance, 204 * isolate ourselves. 205 */ 206 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 207 reg = PHY_READ(sc, MII_BMCR); 208 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 209 return (0); 210 } 211 212 /* 213 * If the interface is not up, don't do anything. 214 */ 215 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 216 break; 217 218 if (IFM_SUBTYPE(ife->ifm_media) == IFM_100_FX) 219 lxtphy_set_fx(sc); 220 else 221 lxtphy_set_tp(sc); 222 223 mii_phy_setmedia(sc); 224 break; 225 226 case MII_TICK: 227 /* 228 * If we're not currently selected, just return. 229 */ 230 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 231 return (0); 232 233 if (mii_phy_tick(sc) == 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 mii_phy_status(sc); 244 245 /* Callback if something changed. */ 246 mii_phy_update(sc, cmd); 247 return (0); 248 } 249 250 static void 251 lxtphy_status(struct mii_softc *sc) 252 { 253 struct mii_data *mii = sc->mii_pdata; 254 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 255 int bmcr, bmsr, csr; 256 257 mii->mii_media_status = IFM_AVALID; 258 mii->mii_media_active = IFM_ETHER; 259 260 /* 261 * Get link status from the CSR; we need to read the CSR 262 * for media type anyhow, and the link status in the CSR 263 * doens't latch, so fewer register reads are required. 264 */ 265 csr = PHY_READ(sc, MII_LXTPHY_CSR); 266 if (csr & CSR_LINK) 267 mii->mii_media_status |= IFM_ACTIVE; 268 269 bmcr = PHY_READ(sc, MII_BMCR); 270 if (bmcr & BMCR_ISO) { 271 mii->mii_media_active |= IFM_NONE; 272 mii->mii_media_status = 0; 273 return; 274 } 275 276 if (bmcr & BMCR_LOOP) 277 mii->mii_media_active |= IFM_LOOP; 278 279 if (bmcr & BMCR_AUTOEN) { 280 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 281 if ((bmsr & BMSR_ACOMP) == 0) { 282 /* Erg, still trying, I guess... */ 283 mii->mii_media_active |= IFM_NONE; 284 return; 285 } 286 if (csr & CSR_SPEED) 287 mii->mii_media_active |= IFM_100_TX; 288 else 289 mii->mii_media_active |= IFM_10_T; 290 if (csr & CSR_DUPLEX) 291 mii->mii_media_active |= IFM_FDX; 292 } else 293 mii->mii_media_active = ife->ifm_media; 294 } 295 296 static void 297 lxtphy_reset(struct mii_softc *sc) 298 { 299 300 mii_phy_reset(sc); 301 PHY_WRITE(sc, MII_LXTPHY_IER, 302 PHY_READ(sc, MII_LXTPHY_IER) & ~IER_INTEN); 303 } 304 305 static void 306 lxtphy_set_tp(struct mii_softc *sc) 307 { 308 int cfg; 309 310 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG); 311 cfg &= ~CONFIG_100BASEFX; 312 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg); 313 } 314 315 static void 316 lxtphy_set_fx(struct mii_softc *sc) 317 { 318 int cfg; 319 320 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG); 321 cfg |= CONFIG_100BASEFX; 322 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg); 323 } 324