1 /* $NetBSD: tlphy.c,v 1.72 2023/02/22 08:09:09 msaitoh 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 * 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 /* 58 * Driver for Texas Instruments's ThunderLAN PHYs 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: tlphy.c,v 1.72 2023/02/22 08:09:09 msaitoh Exp $"); 63 64 #include <sys/param.h> 65 #include <sys/systm.h> 66 #include <sys/kernel.h> 67 #include <sys/device.h> 68 #include <sys/socket.h> 69 #include <sys/errno.h> 70 71 #include <sys/bus.h> 72 73 #include <net/if.h> 74 #include <net/if_media.h> 75 76 #include <net/if_ether.h> 77 78 #include <dev/mii/mii.h> 79 #include <dev/mii/miivar.h> 80 #include <dev/mii/miidevs.h> 81 82 #include <dev/mii/tlphyreg.h> 83 #include <dev/mii/tlphyvar.h> 84 85 /* ThunderLAN PHY can only be on a ThunderLAN */ 86 #include <dev/pci/if_tlvar.h> 87 88 struct tlphy_softc { 89 struct mii_softc sc_mii; /* generic PHY */ 90 int sc_tlphycap; 91 int sc_need_acomp; 92 }; 93 94 static int tlphymatch(device_t, cfdata_t, void *); 95 static void tlphyattach(device_t, device_t, void *); 96 97 CFATTACH_DECL_NEW(tlphy, sizeof(struct tlphy_softc), 98 tlphymatch, tlphyattach, mii_phy_detach, mii_phy_activate); 99 100 static int tlphy_service(struct mii_softc *, struct mii_data *, int); 101 static int tlphy_auto(struct tlphy_softc *); 102 static void tlphy_acomp(struct tlphy_softc *); 103 static void tlphy_status(struct mii_softc *); 104 105 static const struct mii_phy_funcs tlphy_funcs = { 106 tlphy_service, tlphy_status, mii_phy_reset, 107 }; 108 109 static const struct mii_phydesc tlphys[] = { 110 MII_PHY_DESC(TI, TLAN10T), 111 MII_PHY_END, 112 }; 113 114 static int 115 tlphymatch(device_t parent, cfdata_t match, void *aux) 116 { 117 struct mii_attach_args *ma = aux; 118 119 if (mii_phy_match(ma, tlphys) != NULL) 120 return 10; 121 122 return 0; 123 } 124 125 static void 126 tlphyattach(device_t parent, device_t self, void *aux) 127 { 128 struct tlphy_softc *tsc = device_private(self); 129 struct mii_softc *sc = &tsc->sc_mii; 130 struct tl_softc *tlsc = device_private(device_parent(self)); 131 struct mii_attach_args *ma = aux; 132 struct mii_data *mii = ma->mii_data; 133 const struct mii_phydesc *mpd; 134 const char *sep = ""; 135 136 mpd = mii_phy_match(ma, tlphys); 137 aprint_naive(": Media interface\n"); 138 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 139 140 sc->mii_dev = self; 141 sc->mii_inst = mii->mii_instance; 142 sc->mii_phy = ma->mii_phyno; 143 sc->mii_funcs = &tlphy_funcs; 144 sc->mii_pdata = mii; 145 sc->mii_flags = ma->mii_flags; 146 147 mii_lock(mii); 148 149 PHY_RESET(sc); 150 151 /* 152 * Note that if we're on a device that also supports 100baseTX, we are 153 * not going to want to use the built-in 10baseT port, since there will 154 * be another PHY on the MII wired up to the UTP connector. The parent 155 * indicates this to us by specifying the TLPHY_MEDIA_NO_10_T bit. 156 */ 157 tsc->sc_tlphycap = tlsc->tl_product->tp_tlphymedia; 158 if ((tsc->sc_tlphycap & TLPHY_MEDIA_NO_10_T) == 0) { 159 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 160 sc->mii_capabilities &= ma->mii_capmask; 161 } else 162 sc->mii_capabilities = 0; 163 164 mii_unlock(mii); 165 166 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 167 #define PRINT(str) \ 168 do { \ 169 aprint_normal("%s%s", sep, str); \ 170 sep = ", "; \ 171 } while (/* CONSTCOND */0) 172 173 if (tsc->sc_tlphycap) { 174 mii_lock(mii); 175 sc->mii_anegticks = MII_ANEGTICKS; 176 mii_unlock(mii); 177 aprint_normal_dev(self, ""); 178 if (tsc->sc_tlphycap & TLPHY_MEDIA_10_2) { 179 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_2, 0, sc->mii_inst), 180 0); 181 PRINT("10base2"); 182 } else if (tsc->sc_tlphycap & TLPHY_MEDIA_10_5) { 183 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_5, 0, sc->mii_inst), 184 0); 185 PRINT("10base5"); 186 } else 187 PRINT("no media present"); 188 aprint_normal("\n"); 189 } 190 if (sc->mii_capabilities & BMSR_MEDIAMASK) 191 mii_phy_add_media(sc); 192 else { 193 /* 194 * mii_phy_add_media() automatically install power handler, 195 * but if_media_add() doesn't. Do it now. 196 */ 197 if (!pmf_device_register(self, NULL, mii_phy_resume)) { 198 aprint_error_dev(self, 199 "couldn't establish power handler\n"); 200 } 201 } 202 #undef ADD 203 #undef PRINT 204 } 205 206 static int 207 tlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 208 { 209 struct tlphy_softc *tsc = (struct tlphy_softc *)sc; 210 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 211 uint16_t reg; 212 213 KASSERT(mii_locked(mii)); 214 215 if ((sc->mii_flags & MIIF_DOINGAUTO) == 0 && tsc->sc_need_acomp) 216 tlphy_acomp(tsc); 217 218 switch (cmd) { 219 case MII_POLLSTAT: 220 /* If we're not polling our PHY instance, just return. */ 221 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 222 return 0; 223 break; 224 225 case MII_MEDIACHG: 226 /* 227 * If the media indicates a different PHY instance, 228 * isolate ourselves. 229 */ 230 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 231 PHY_READ(sc, MII_BMCR, ®); 232 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 233 return 0; 234 } 235 236 /* If the interface is not up, don't do anything. */ 237 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 238 break; 239 240 switch (IFM_SUBTYPE(ife->ifm_media)) { 241 case IFM_AUTO: 242 (void) tlphy_auto(tsc); 243 break; 244 case IFM_10_2: 245 case IFM_10_5: 246 PHY_WRITE(sc, MII_BMCR, 0); 247 PHY_WRITE(sc, MII_TLPHY_CTRL, CTRL_AUISEL); 248 delay(100000); 249 break; 250 default: 251 PHY_WRITE(sc, MII_TLPHY_CTRL, 0); 252 delay(100000); 253 mii_phy_setmedia(sc); 254 } 255 break; 256 257 case MII_TICK: 258 /* If we're not currently selected, just return. */ 259 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 260 return 0; 261 262 /* 263 * XXX WHAT ABOUT CHECKING LINK ON THE BNC/AUI?! 264 */ 265 266 /* Only used for autonegotiation. */ 267 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 268 sc->mii_ticks = 0; 269 break; 270 } 271 272 /* 273 * Check for link. 274 * Read the status register twice; BMSR_LINK is latch-low. 275 */ 276 PHY_READ(sc, MII_BMSR, ®); 277 PHY_READ(sc, MII_BMSR, ®); 278 if (reg & BMSR_LINK) { 279 sc->mii_ticks = 0; 280 break; 281 } 282 283 /* 284 * mii_ticks == 0 means it's the first tick after changing the 285 * media or the link became down since the last tick 286 * (see above), so break to update the status. 287 */ 288 if (sc->mii_ticks++ == 0) 289 break; 290 291 /* Only retry autonegotiation every mii_anegticks seconds. */ 292 KASSERT(sc->mii_anegticks != 0); 293 if (sc->mii_ticks < sc->mii_anegticks) 294 break; 295 296 tlphy_auto(tsc); 297 break; 298 299 case MII_DOWN: 300 mii_phy_down(sc); 301 return 0; 302 } 303 304 /* Update the media status. */ 305 mii_phy_status(sc); 306 307 /* Callback if something changed. */ 308 mii_phy_update(sc, cmd); 309 return 0; 310 } 311 312 static void 313 tlphy_status(struct mii_softc *sc) 314 { 315 struct tlphy_softc *tsc = (struct tlphy_softc *)sc; 316 struct mii_data *mii = sc->mii_pdata; 317 uint16_t bmsr, bmcr, tlctrl; 318 319 KASSERT(mii_locked(mii)); 320 321 mii->mii_media_status = IFM_AVALID; 322 mii->mii_media_active = IFM_ETHER; 323 324 PHY_READ(sc, MII_BMCR, &bmcr); 325 if (bmcr & BMCR_ISO) { 326 mii->mii_media_active |= IFM_NONE; 327 mii->mii_media_status = 0; 328 return; 329 } 330 331 PHY_READ(sc, MII_TLPHY_CTRL, &tlctrl); 332 if (tlctrl & CTRL_AUISEL) { 333 if (tsc->sc_tlphycap & TLPHY_MEDIA_10_2) 334 mii->mii_media_active |= IFM_10_2; 335 else if (tsc->sc_tlphycap & TLPHY_MEDIA_10_5) 336 mii->mii_media_active |= IFM_10_5; 337 else 338 printf("%s: AUI selected with no matching media !\n", 339 device_xname(sc->mii_dev)); 340 mii->mii_media_status |= IFM_ACTIVE; 341 return; 342 } 343 344 PHY_READ(sc, MII_BMSR, &bmsr); 345 PHY_READ(sc, MII_BMSR, &bmsr); 346 if (bmsr & BMSR_LINK) 347 mii->mii_media_status |= IFM_ACTIVE; 348 349 if (bmcr & BMCR_LOOP) 350 mii->mii_media_active |= IFM_LOOP; 351 352 /* 353 * Grr, braindead ThunderLAN PHY doesn't have any way to tell which 354 * media is actually active. (Note it also doesn't self-configure 355 * after autonegotiation.) We just have to report what's in the BMCR. 356 */ 357 if (bmcr & BMCR_FDX) 358 mii->mii_media_active |= IFM_FDX; 359 else 360 mii->mii_media_active |= IFM_HDX; 361 mii->mii_media_active |= IFM_10_T; 362 } 363 364 static int 365 tlphy_auto(struct tlphy_softc *tsc) 366 { 367 struct mii_softc *sc = &tsc->sc_mii; 368 int error; 369 370 switch ((error = mii_phy_auto(sc))) { 371 case EJUSTRETURN: 372 /* Flag that we need to program when it completes. */ 373 tsc->sc_need_acomp = 1; 374 break; 375 376 default: 377 tlphy_acomp(tsc); 378 } 379 380 return error; 381 } 382 383 static void 384 tlphy_acomp(struct tlphy_softc *tsc) 385 { 386 struct mii_softc *sc = &tsc->sc_mii; 387 uint16_t aner, anar, anlpar, result; 388 389 tsc->sc_need_acomp = 0; 390 391 /* 392 * Grr, braindead ThunderLAN PHY doesn't self-configure 393 * after autonegotiation. We have to do it ourselves 394 * based on the link partner status. 395 */ 396 397 PHY_READ(sc, MII_ANER, &aner); 398 if (aner & ANER_LPAN) { 399 PHY_READ(sc, MII_ANAR, &anar); 400 PHY_READ(sc, MII_ANLPAR, &anlpar); 401 result = anar & anlpar; 402 if (result & ANAR_10_FD) { 403 PHY_WRITE(sc, MII_BMCR, BMCR_FDX); 404 return; 405 } 406 } 407 PHY_WRITE(sc, MII_BMCR, 0); 408 } 409
Indexes created Mon Sep 22 10:09:38 GMT 2025