Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mii/tlphy.c
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1 /* $NetBSD: tlphy.c,v 1.18 1999/05/14 11:40:28 drochner 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 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /*- 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 #include <sys/cdefs.h> 58 __FBSDID("$FreeBSD: releng/8.2/sys/dev/mii/tlphy.c 214929 2010-11-07 17:48:07Z marius $"); 59 60 /* 61 * Driver for Texas Instruments's ThunderLAN PHYs 62 */ 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/kernel.h> 67 #include <sys/socket.h> 68 #include <sys/errno.h> 69 #include <sys/module.h> 70 #include <sys/bus.h> 71 #include <sys/malloc.h> 72 73 #include <machine/bus.h> 74 75 #include <net/if.h> 76 #include <net/if_media.h> 77 78 #include <dev/mii/mii.h> 79 #include <dev/mii/miivar.h> 80 #include "miidevs.h" 81 82 #include <dev/mii/tlphyreg.h> 83 84 #include "miibus_if.h" 85 86 struct tlphy_softc { 87 struct mii_softc sc_mii; /* generic PHY */ 88 int sc_need_acomp; 89 }; 90 91 static int tlphy_probe(device_t); 92 static int tlphy_attach(device_t); 93 94 static device_method_t tlphy_methods[] = { 95 /* device interface */ 96 DEVMETHOD(device_probe, tlphy_probe), 97 DEVMETHOD(device_attach, tlphy_attach), 98 DEVMETHOD(device_detach, mii_phy_detach), 99 DEVMETHOD(device_shutdown, bus_generic_shutdown), 100 { 0, 0 } 101 }; 102 103 static devclass_t tlphy_devclass; 104 105 static driver_t tlphy_driver = { 106 "tlphy", 107 tlphy_methods, 108 sizeof(struct tlphy_softc) 109 }; 110 111 DRIVER_MODULE(tlphy, miibus, tlphy_driver, tlphy_devclass, 0, 0); 112 113 static int tlphy_service(struct mii_softc *, struct mii_data *, int); 114 static int tlphy_auto(struct tlphy_softc *); 115 static void tlphy_acomp(struct tlphy_softc *); 116 static void tlphy_status(struct tlphy_softc *); 117 118 static const struct mii_phydesc tlphys[] = { 119 MII_PHY_DESC(xxTI, TLAN10T), 120 MII_PHY_END 121 }; 122 123 static int 124 tlphy_probe(device_t dev) 125 { 126 127 if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))), 128 "tl") != 0) 129 return (ENXIO); 130 return (mii_phy_dev_probe(dev, tlphys, BUS_PROBE_DEFAULT)); 131 } 132 133 static int 134 tlphy_attach(device_t dev) 135 { 136 device_t *devlist; 137 struct tlphy_softc *sc; 138 struct mii_softc *other; 139 struct mii_attach_args *ma; 140 struct mii_data *mii; 141 const char *sep = ""; 142 int capmask, devs, i; 143 144 sc = device_get_softc(dev); 145 ma = device_get_ivars(dev); 146 sc->sc_mii.mii_dev = device_get_parent(dev); 147 mii = device_get_softc(sc->sc_mii.mii_dev); 148 LIST_INSERT_HEAD(&mii->mii_phys, &sc->sc_mii, mii_list); 149 150 sc->sc_mii.mii_flags = miibus_get_flags(dev); 151 sc->sc_mii.mii_inst = mii->mii_instance; 152 sc->sc_mii.mii_phy = ma->mii_phyno; 153 sc->sc_mii.mii_service = tlphy_service; 154 sc->sc_mii.mii_pdata = mii; 155 156 /* 157 * Note that if we're on a device that also supports 100baseTX, 158 * we are not going to want to use the built-in 10baseT port, 159 * since there will be another PHY on the MII wired up to the 160 * UTP connector. 161 */ 162 capmask = BMSR_DEFCAPMASK; 163 if (mii->mii_instance && 164 device_get_children(sc->sc_mii.mii_dev, &devlist, &devs) == 0) { 165 for (i = 0; i < devs; i++) { 166 if (devlist[i] != dev) { 167 other = device_get_softc(devlist[i]); 168 capmask &= ~other->mii_capabilities; 169 break; 170 } 171 } 172 free(devlist, M_TEMP); 173 } 174 175 mii->mii_instance++; 176 177 mii_phy_reset(&sc->sc_mii); 178 179 sc->sc_mii.mii_capabilities = 180 PHY_READ(&sc->sc_mii, MII_BMSR) & capmask; 181 182 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 183 184 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP, sc->sc_mii.mii_inst), 185 MII_MEDIA_100_TX); 186 187 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 188 189 if ((sc->sc_mii.mii_flags & (MIIF_MACPRIV0 | MIIF_MACPRIV1)) != 0 && 190 (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) != 0) 191 device_printf(dev, " "); 192 if ((sc->sc_mii.mii_flags & MIIF_MACPRIV0) != 0) { 193 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->sc_mii.mii_inst), 194 0); 195 PRINT("10base2/BNC"); 196 } 197 if ((sc->sc_mii.mii_flags & MIIF_MACPRIV1) != 0) { 198 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc->sc_mii.mii_inst), 199 0); 200 PRINT("10base5/AUI"); 201 } 202 if ((sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) != 0) { 203 printf("%s", sep); 204 mii_phy_add_media(&sc->sc_mii); 205 } 206 if ((sc->sc_mii.mii_flags & (MIIF_MACPRIV0 | MIIF_MACPRIV1)) != 0 && 207 (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) != 0) 208 printf("\n"); 209 #undef ADD 210 #undef PRINT 211 MIIBUS_MEDIAINIT(sc->sc_mii.mii_dev); 212 return (0); 213 } 214 215 static int 216 tlphy_service(struct mii_softc *self, struct mii_data *mii, int cmd) 217 { 218 struct tlphy_softc *sc = (struct tlphy_softc *)self; 219 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 220 int reg; 221 222 if (sc->sc_need_acomp) 223 tlphy_acomp(sc); 224 225 switch (cmd) { 226 case MII_POLLSTAT: 227 break; 228 229 case MII_MEDIACHG: 230 /* 231 * If the interface is not up, don't do anything. 232 */ 233 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 234 break; 235 236 switch (IFM_SUBTYPE(ife->ifm_media)) { 237 case IFM_AUTO: 238 /* 239 * The ThunderLAN PHY doesn't self-configure after 240 * an autonegotiation cycle, so there's no such 241 * thing as "already in auto mode". 242 */ 243 (void)tlphy_auto(sc); 244 break; 245 case IFM_10_2: 246 case IFM_10_5: 247 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 248 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, CTRL_AUISEL); 249 DELAY(100000); 250 break; 251 default: 252 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, 0); 253 DELAY(100000); 254 mii_phy_setmedia(&sc->sc_mii); 255 } 256 break; 257 258 case MII_TICK: 259 /* 260 * Is the interface even up? 261 */ 262 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 263 return (0); 264 265 /* 266 * Only used for autonegotiation. 267 */ 268 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 269 break; 270 271 /* 272 * Check to see if we have link. If we do, we don't 273 * need to restart the autonegotiation process. Read 274 * the BMSR twice in case it's latched. 275 * 276 * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?! 277 */ 278 reg = PHY_READ(&sc->sc_mii, MII_BMSR) | 279 PHY_READ(&sc->sc_mii, MII_BMSR); 280 if (reg & BMSR_LINK) 281 break; 282 283 /* 284 * Only retry autonegotiation every 5 seconds. 285 */ 286 if (++sc->sc_mii.mii_ticks <= MII_ANEGTICKS) 287 break; 288 289 sc->sc_mii.mii_ticks = 0; 290 mii_phy_reset(&sc->sc_mii); 291 (void)tlphy_auto(sc); 292 return (0); 293 } 294 295 /* Update the media status. */ 296 tlphy_status(sc); 297 298 /* Callback if something changed. */ 299 mii_phy_update(&sc->sc_mii, cmd); 300 return (0); 301 } 302 303 static void 304 tlphy_status(struct tlphy_softc *sc) 305 { 306 struct mii_data *mii = sc->sc_mii.mii_pdata; 307 int bmsr, bmcr, tlctrl; 308 309 mii->mii_media_status = IFM_AVALID; 310 mii->mii_media_active = IFM_ETHER; 311 312 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR); 313 if (bmcr & BMCR_ISO) { 314 mii->mii_media_active |= IFM_NONE; 315 mii->mii_media_status = 0; 316 return; 317 } 318 319 tlctrl = PHY_READ(&sc->sc_mii, MII_TLPHY_CTRL); 320 if (tlctrl & CTRL_AUISEL) { 321 mii->mii_media_status = 0; 322 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media; 323 return; 324 } 325 326 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) | 327 PHY_READ(&sc->sc_mii, MII_BMSR); 328 if (bmsr & BMSR_LINK) 329 mii->mii_media_status |= IFM_ACTIVE; 330 331 if (bmcr & BMCR_LOOP) 332 mii->mii_media_active |= IFM_LOOP; 333 334 /* 335 * Grr, braindead ThunderLAN PHY doesn't have any way to 336 * tell which media is actually active. (Note it also 337 * doesn't self-configure after autonegotiation.) We 338 * just have to report what's in the BMCR. 339 */ 340 if (bmcr & BMCR_FDX) 341 mii->mii_media_active |= IFM_FDX; 342 else 343 mii->mii_media_active |= IFM_HDX; 344 mii->mii_media_active |= IFM_10_T; 345 } 346 347 static int 348 tlphy_auto(struct tlphy_softc *sc) 349 { 350 int error; 351 352 switch ((error = mii_phy_auto(&sc->sc_mii))) { 353 case EIO: 354 /* 355 * Just assume we're not in full-duplex mode. 356 * XXX Check link and try AUI/BNC? 357 */ 358 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 359 break; 360 361 case EJUSTRETURN: 362 /* Flag that we need to program when it completes. */ 363 sc->sc_need_acomp = 1; 364 break; 365 366 default: 367 tlphy_acomp(sc); 368 } 369 370 return (error); 371 } 372 373 static void 374 tlphy_acomp(struct tlphy_softc *sc) 375 { 376 int aner, anlpar; 377 378 sc->sc_need_acomp = 0; 379 380 /* 381 * Grr, braindead ThunderLAN PHY doesn't self-configure 382 * after autonegotiation. We have to do it ourselves 383 * based on the link partner status. 384 */ 385 386 aner = PHY_READ(&sc->sc_mii, MII_ANER); 387 if (aner & ANER_LPAN) { 388 anlpar = PHY_READ(&sc->sc_mii, MII_ANLPAR) & 389 PHY_READ(&sc->sc_mii, MII_ANAR); 390 if (anlpar & ANAR_10_FD) { 391 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_FDX); 392 return; 393 } 394 } 395 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 396 }
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