1 /* OpenBSD: lxtphy.c,v 1.5 2000/08/26 20:04:17 nate Exp */ 2 /* NetBSD: lxtphy.c,v 1.19 2000/02/02 23:34:57 thorpej 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 * $FreeBSD: src/sys/dev/mii/lxtphy.c,v 1.1.2.1 2001/06/08 19:58:33 semenu Exp $ 41 * $DragonFly: src/sys/dev/netif/mii_layer/lxtphy.c,v 1.5 2004/09/18 19:32:59 dillon Exp $ 42 */ 43 44 /* 45 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by Manuel Bouyer. 58 * 4. The name of the author may not be used to endorse or promote products 59 * derived from this software without specific prior written permission. 60 * 61 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 62 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 63 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 64 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 65 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 66 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 67 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 68 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 69 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 70 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 71 */ 72 73 /* 74 * driver for Level One's LXT-970 ethernet 10/100 PHY 75 * datasheet from www.level1.com 76 */ 77 78 #include <sys/param.h> 79 #include <sys/systm.h> 80 #include <sys/kernel.h> 81 #include <sys/socket.h> 82 #include <sys/errno.h> 83 #include <sys/module.h> 84 #include <sys/bus.h> 85 86 #include <net/if.h> 87 #include <net/if_media.h> 88 89 #include "mii.h" 90 #include "miivar.h" 91 #include "miidevs.h" 92 93 #include "lxtphyreg.h" 94 95 #include "miibus_if.h" 96 97 static int lxtphy_probe (device_t); 98 static int lxtphy_attach (device_t); 99 static int lxtphy_detach (device_t); 100 101 static device_method_t lxtphy_methods[] = { 102 /* device interface */ 103 DEVMETHOD(device_probe, lxtphy_probe), 104 DEVMETHOD(device_attach, lxtphy_attach), 105 DEVMETHOD(device_detach, lxtphy_detach), 106 DEVMETHOD(device_shutdown, bus_generic_shutdown), 107 { 0, 0 } 108 }; 109 110 static devclass_t lxtphy_devclass; 111 112 static driver_t lxtphy_driver = { 113 "lxtphy", 114 lxtphy_methods, 115 sizeof(struct mii_softc) 116 }; 117 118 DRIVER_MODULE(lxtphy, miibus, lxtphy_driver, lxtphy_devclass, 0, 0); 119 120 static int lxtphy_service (struct mii_softc *, struct mii_data *, int); 121 static void lxtphy_status (struct mii_softc *); 122 static void lxtphy_set_tp (struct mii_softc *); 123 static void lxtphy_set_fx (struct mii_softc *); 124 125 static int lxtphy_probe(dev) 126 device_t dev; 127 { 128 struct mii_attach_args *ma; 129 130 ma = device_get_ivars(dev); 131 132 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxLEVEL1 && 133 MII_MODEL(ma->mii_id2) == MII_MODEL_xxLEVEL1_LXT970) { 134 device_set_desc(dev, MII_STR_xxLEVEL1_LXT970); 135 } else 136 return (ENXIO); 137 138 return (0); 139 } 140 141 static int lxtphy_attach(dev) 142 device_t dev; 143 { 144 struct mii_softc *sc; 145 struct mii_attach_args *ma; 146 struct mii_data *mii; 147 148 sc = device_get_softc(dev); 149 ma = device_get_ivars(dev); 150 mii_softc_init(sc); 151 sc->mii_dev = device_get_parent(dev); 152 mii = device_get_softc(sc->mii_dev); 153 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 154 155 sc->mii_inst = mii->mii_instance; 156 sc->mii_phy = ma->mii_phyno; 157 sc->mii_service = lxtphy_service; 158 sc->mii_pdata = mii; 159 sc->mii_flags |= MIIF_NOISOLATE; 160 161 mii_phy_reset(sc); 162 163 mii->mii_instance++; 164 165 sc->mii_capabilities = 166 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 167 device_printf(dev, " "); 168 169 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 170 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 171 BMCR_ISO); 172 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, 0, sc->mii_inst), 173 BMCR_S100); 174 printf("100baseFX, "); 175 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_FX, IFM_FDX, sc->mii_inst), 176 BMCR_S100|BMCR_FDX); 177 printf("100baseFX-FDX, "); 178 #undef ADD 179 180 if (sc->mii_capabilities & BMSR_MEDIAMASK) 181 mii_add_media(mii, sc->mii_capabilities, 182 sc->mii_inst); 183 printf("\n"); 184 185 MIIBUS_MEDIAINIT(sc->mii_dev); 186 return(0); 187 } 188 189 190 static int lxtphy_detach(dev) 191 device_t dev; 192 { 193 struct mii_softc *sc; 194 struct mii_data *mii; 195 196 sc = device_get_softc(dev); 197 mii = device_get_softc(device_get_parent(dev)); 198 sc->mii_dev = NULL; 199 LIST_REMOVE(sc, mii_list); 200 201 return(0); 202 } 203 204 static int 205 lxtphy_service(sc, mii, cmd) 206 struct mii_softc *sc; 207 struct mii_data *mii; 208 int cmd; 209 { 210 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 211 int reg; 212 213 switch (cmd) { 214 case MII_POLLSTAT: 215 /* 216 * If we're not polling our PHY instance, just return. 217 */ 218 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 219 return (0); 220 break; 221 222 case MII_MEDIACHG: 223 /* 224 * If the media indicates a different PHY instance, 225 * isolate ourselves. 226 */ 227 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 228 reg = PHY_READ(sc, MII_BMCR); 229 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 230 return (0); 231 } 232 233 /* 234 * If the interface is not up, don't do anything. 235 */ 236 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 237 break; 238 239 switch (IFM_SUBTYPE(ife->ifm_media)) { 240 case IFM_AUTO: 241 /* 242 * If we're already in auto mode, just return. 243 */ 244 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 245 return (0); 246 247 lxtphy_set_tp(sc); 248 249 (void) mii_phy_auto(sc, 1); 250 break; 251 case IFM_100_T4: 252 /* 253 * XXX Not supported as a manual setting right now. 254 */ 255 return (EINVAL); 256 257 case IFM_100_FX: 258 lxtphy_set_fx(sc); 259 260 default: 261 /* 262 * BMCR data is stored in the ifmedia entry. 263 */ 264 PHY_WRITE(sc, MII_ANAR, 265 mii_anar(ife->ifm_media)); 266 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 267 } 268 break; 269 270 case MII_TICK: 271 /* 272 * If we're not currently selected, just return. 273 */ 274 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 275 return (0); 276 277 /* 278 * Only used for autonegotiation. 279 */ 280 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 281 return (0); 282 283 /* 284 * Is the interface even up? 285 */ 286 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 287 return (0); 288 289 /* 290 * Check to see if we have link. If we do, we don't 291 * need to restart the autonegotiation process. Read 292 * the BMSR twice in case it's latched. 293 */ 294 reg = PHY_READ(sc, MII_BMSR) | 295 PHY_READ(sc, MII_BMSR); 296 if (reg & BMSR_LINK) 297 return (0); 298 299 /* 300 * Only retry autonegotiation every 5 seconds. 301 */ 302 if (++sc->mii_ticks != 5) 303 return (0); 304 305 sc->mii_ticks = 0; 306 mii_phy_reset(sc); 307 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 308 return (0); 309 break; 310 } 311 312 /* Update the media status. */ 313 lxtphy_status(sc); 314 315 /* Callback if something changed. */ 316 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 317 MIIBUS_STATCHG(sc->mii_dev); 318 sc->mii_active = mii->mii_media_active; 319 } 320 return (0); 321 } 322 323 static void 324 lxtphy_status(sc) 325 struct mii_softc *sc; 326 { 327 struct mii_data *mii = sc->mii_pdata; 328 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 329 int bmcr, bmsr, csr; 330 331 mii->mii_media_status = IFM_AVALID; 332 mii->mii_media_active = IFM_ETHER; 333 334 /* 335 * Get link status from the CSR; we need to read the CSR 336 * for media type anyhow, and the link status in the CSR 337 * doens't latch, so fewer register reads are required. 338 */ 339 csr = PHY_READ(sc, MII_LXTPHY_CSR); 340 if (csr & CSR_LINK) 341 mii->mii_media_status |= IFM_ACTIVE; 342 343 bmcr = PHY_READ(sc, MII_BMCR); 344 if (bmcr & BMCR_ISO) { 345 mii->mii_media_active |= IFM_NONE; 346 mii->mii_media_status = 0; 347 return; 348 } 349 350 if (bmcr & BMCR_LOOP) 351 mii->mii_media_active |= IFM_LOOP; 352 353 if (bmcr & BMCR_AUTOEN) { 354 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 355 if ((bmsr & BMSR_ACOMP) == 0) { 356 /* Erg, still trying, I guess... */ 357 mii->mii_media_active |= IFM_NONE; 358 return; 359 } 360 if (csr & CSR_SPEED) 361 mii->mii_media_active |= IFM_100_TX; 362 else 363 mii->mii_media_active |= IFM_10_T; 364 if (csr & CSR_DUPLEX) 365 mii->mii_media_active |= IFM_FDX; 366 } else 367 mii->mii_media_active = ife->ifm_media; 368 } 369 370 static void 371 lxtphy_set_tp(sc) 372 struct mii_softc *sc; 373 { 374 int cfg; 375 376 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG); 377 cfg &= ~CONFIG_100BASEFX; 378 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg); 379 } 380 381 static void 382 lxtphy_set_fx(sc) 383 struct mii_softc *sc; 384 { 385 int cfg; 386 387 cfg = PHY_READ(sc, MII_LXTPHY_CONFIG); 388 cfg |= CONFIG_100BASEFX; 389 PHY_WRITE(sc, MII_LXTPHY_CONFIG, cfg); 390 } 391 392