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/8.4/sys/dev/mii/tlphy.c 230718 2012-01-29 01:35:14Z 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 DEVMETHOD_END 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 sc->sc_mii.mii_flags |= MIIF_NOMANPAUSE; 157 158 /* 159 * Note that if we're on a device that also supports 100baseTX, 160 * we are not going to want to use the built-in 10baseT port, 161 * since there will be another PHY on the MII wired up to the 162 * UTP connector. 163 */ 164 capmask = BMSR_DEFCAPMASK; 165 if (mii->mii_instance && 166 device_get_children(sc->sc_mii.mii_dev, &devlist, &devs) == 0) { 167 for (i = 0; i < devs; i++) { 168 if (devlist[i] != dev) { 169 other = device_get_softc(devlist[i]); 170 capmask &= ~other->mii_capabilities; 171 break; 172 } 173 } 174 free(devlist, M_TEMP); 175 } 176 177 mii->mii_instance++; 178 179 mii_phy_reset(&sc->sc_mii); 180 181 sc->sc_mii.mii_capabilities = 182 PHY_READ(&sc->sc_mii, MII_BMSR) & capmask; 183 184 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 185 186 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_LOOP, sc->sc_mii.mii_inst), 187 MII_MEDIA_100_TX); 188 189 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 190 191 if ((sc->sc_mii.mii_flags & (MIIF_MACPRIV0 | MIIF_MACPRIV1)) != 0 && 192 (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) != 0) 193 device_printf(dev, " "); 194 if ((sc->sc_mii.mii_flags & MIIF_MACPRIV0) != 0) { 195 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->sc_mii.mii_inst), 196 0); 197 PRINT("10base2/BNC"); 198 } 199 if ((sc->sc_mii.mii_flags & MIIF_MACPRIV1) != 0) { 200 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc->sc_mii.mii_inst), 201 0); 202 PRINT("10base5/AUI"); 203 } 204 if ((sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) != 0) { 205 printf("%s", sep); 206 mii_phy_add_media(&sc->sc_mii); 207 } 208 if ((sc->sc_mii.mii_flags & (MIIF_MACPRIV0 | MIIF_MACPRIV1)) != 0 && 209 (sc->sc_mii.mii_capabilities & BMSR_MEDIAMASK) != 0) 210 printf("\n"); 211 #undef ADD 212 #undef PRINT 213 MIIBUS_MEDIAINIT(sc->sc_mii.mii_dev); 214 return (0); 215 } 216 217 static int 218 tlphy_service(struct mii_softc *self, struct mii_data *mii, int cmd) 219 { 220 struct tlphy_softc *sc = (struct tlphy_softc *)self; 221 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 222 int reg; 223 224 if (sc->sc_need_acomp) 225 tlphy_acomp(sc); 226 227 switch (cmd) { 228 case MII_POLLSTAT: 229 break; 230 231 case MII_MEDIACHG: 232 /* 233 * If the interface is not up, don't do anything. 234 */ 235 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 236 break; 237 238 switch (IFM_SUBTYPE(ife->ifm_media)) { 239 case IFM_AUTO: 240 /* 241 * The ThunderLAN PHY doesn't self-configure after 242 * an autonegotiation cycle, so there's no such 243 * thing as "already in auto mode". 244 */ 245 (void)tlphy_auto(sc); 246 break; 247 case IFM_10_2: 248 case IFM_10_5: 249 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 250 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, CTRL_AUISEL); 251 DELAY(100000); 252 break; 253 default: 254 PHY_WRITE(&sc->sc_mii, MII_TLPHY_CTRL, 0); 255 DELAY(100000); 256 mii_phy_setmedia(&sc->sc_mii); 257 } 258 break; 259 260 case MII_TICK: 261 /* 262 * Is the interface even up? 263 */ 264 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 265 return (0); 266 267 /* 268 * Only used for autonegotiation. 269 */ 270 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 271 break; 272 273 /* 274 * Check to see if we have link. If we do, we don't 275 * need to restart the autonegotiation process. Read 276 * the BMSR twice in case it's latched. 277 * 278 * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?! 279 */ 280 reg = PHY_READ(&sc->sc_mii, MII_BMSR) | 281 PHY_READ(&sc->sc_mii, MII_BMSR); 282 if (reg & BMSR_LINK) 283 break; 284 285 /* 286 * Only retry autonegotiation every 5 seconds. 287 */ 288 if (++sc->sc_mii.mii_ticks <= MII_ANEGTICKS) 289 break; 290 291 sc->sc_mii.mii_ticks = 0; 292 mii_phy_reset(&sc->sc_mii); 293 (void)tlphy_auto(sc); 294 return (0); 295 } 296 297 /* Update the media status. */ 298 tlphy_status(sc); 299 300 /* Callback if something changed. */ 301 mii_phy_update(&sc->sc_mii, cmd); 302 return (0); 303 } 304 305 static void 306 tlphy_status(struct tlphy_softc *sc) 307 { 308 struct mii_data *mii = sc->sc_mii.mii_pdata; 309 int bmsr, bmcr, tlctrl; 310 311 mii->mii_media_status = IFM_AVALID; 312 mii->mii_media_active = IFM_ETHER; 313 314 bmcr = PHY_READ(&sc->sc_mii, MII_BMCR); 315 if (bmcr & BMCR_ISO) { 316 mii->mii_media_active |= IFM_NONE; 317 mii->mii_media_status = 0; 318 return; 319 } 320 321 tlctrl = PHY_READ(&sc->sc_mii, MII_TLPHY_CTRL); 322 if (tlctrl & CTRL_AUISEL) { 323 mii->mii_media_status = 0; 324 mii->mii_media_active = mii->mii_media.ifm_cur->ifm_media; 325 return; 326 } 327 328 bmsr = PHY_READ(&sc->sc_mii, MII_BMSR) | 329 PHY_READ(&sc->sc_mii, MII_BMSR); 330 if (bmsr & BMSR_LINK) 331 mii->mii_media_status |= IFM_ACTIVE; 332 333 if (bmcr & BMCR_LOOP) 334 mii->mii_media_active |= IFM_LOOP; 335 336 /* 337 * Grr, braindead ThunderLAN PHY doesn't have any way to 338 * tell which media is actually active. (Note it also 339 * doesn't self-configure after autonegotiation.) We 340 * just have to report what's in the BMCR. 341 */ 342 if (bmcr & BMCR_FDX) 343 mii->mii_media_active |= 344 IFM_FDX | mii_phy_flowstatus(&sc->sc_mii); 345 else 346 mii->mii_media_active |= IFM_HDX; 347 mii->mii_media_active |= IFM_10_T; 348 } 349 350 static int 351 tlphy_auto(struct tlphy_softc *sc) 352 { 353 int error; 354 355 switch ((error = mii_phy_auto(&sc->sc_mii))) { 356 case EIO: 357 /* 358 * Just assume we're not in full-duplex mode. 359 * XXX Check link and try AUI/BNC? 360 */ 361 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 362 break; 363 364 case EJUSTRETURN: 365 /* Flag that we need to program when it completes. */ 366 sc->sc_need_acomp = 1; 367 break; 368 369 default: 370 tlphy_acomp(sc); 371 } 372 373 return (error); 374 } 375 376 static void 377 tlphy_acomp(struct tlphy_softc *sc) 378 { 379 int aner, anlpar; 380 381 sc->sc_need_acomp = 0; 382 383 /* 384 * Grr, braindead ThunderLAN PHY doesn't self-configure 385 * after autonegotiation. We have to do it ourselves 386 * based on the link partner status. 387 */ 388 389 aner = PHY_READ(&sc->sc_mii, MII_ANER); 390 if (aner & ANER_LPAN) { 391 anlpar = PHY_READ(&sc->sc_mii, MII_ANLPAR) & 392 PHY_READ(&sc->sc_mii, MII_ANAR); 393 if (anlpar & ANAR_10_FD) { 394 PHY_WRITE(&sc->sc_mii, MII_BMCR, BMCR_FDX); 395 return; 396 } 397 } 398 PHY_WRITE(&sc->sc_mii, MII_BMCR, 0); 399 }
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