1 /* $NetBSD: mii_physubr.c,v 1.5 1999/08/03 19:41:49 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 * 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 * Subroutines common to all PHYs. 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/socket.h> 48 #include <sys/errno.h> 49 #include <sys/module.h> 50 #include <sys/bus.h> 51 52 53 #include <net/if.h> 54 #include <net/if_media.h> 55 56 #include <dev/mii/mii.h> 57 #include <dev/mii/miivar.h> 58 59 #include "miibus_if.h" 60 61 #if !defined(lint) 62 static const char rcsid[] = 63 "$FreeBSD$"; 64 #endif 65 66 void mii_phy_auto_timeout __P((void *)); 67 68 int 69 mii_phy_auto(mii, waitfor) 70 struct mii_softc *mii; 71 int waitfor; 72 { 73 int bmsr, i; 74 75 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 76 PHY_WRITE(mii, MII_ANAR, 77 BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA); 78 PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 79 } 80 81 if (waitfor) { 82 /* Wait 500ms for it to complete. */ 83 for (i = 0; i < 500; i++) { 84 if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP) 85 return (0); 86 DELAY(1000); 87 #if 0 88 if ((bmsr & BMSR_ACOMP) == 0) 89 printf("%s: autonegotiation failed to complete\n", 90 mii->mii_dev.dv_xname); 91 #endif 92 } 93 94 /* 95 * Don't need to worry about clearing MIIF_DOINGAUTO. 96 * If that's set, a timeout is pending, and it will 97 * clear the flag. 98 */ 99 return (EIO); 100 } 101 102 /* 103 * Just let it finish asynchronously. This is for the benefit of 104 * the tick handler driving autonegotiation. Don't want 500ms 105 * delays all the time while the system is running! 106 */ 107 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 108 mii->mii_flags |= MIIF_DOINGAUTO; 109 mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1); 110 } 111 return (EJUSTRETURN); 112 } 113 114 void 115 mii_phy_auto_stop(sc) 116 struct mii_softc *sc; 117 { 118 if (sc->mii_flags & MIIF_DOINGAUTO) { 119 sc->mii_flags &= ~MIIF_DOINGAUTO; 120 untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch); 121 } 122 } 123 124 void 125 mii_phy_auto_timeout(arg) 126 void *arg; 127 { 128 struct mii_softc *mii = arg; 129 int s, bmsr; 130 131 s = splnet(); 132 mii->mii_flags &= ~MIIF_DOINGAUTO; 133 bmsr = PHY_READ(mii, MII_BMSR); 134 #if 0 135 if ((bmsr & BMSR_ACOMP) == 0) 136 printf("%s: autonegotiation failed to complete\n", 137 sc->sc_dev.dv_xname); 138 #endif 139 140 /* Update the media status. */ 141 (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); 142 splx(s); 143 } 144 145 int 146 mii_phy_tick(sc) 147 struct mii_softc *sc; 148 { 149 struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; 150 struct ifnet *ifp = sc->mii_pdata->mii_ifp; 151 int reg; 152 153 /* 154 * Is the interface even up? 155 */ 156 if ((ifp->if_flags & IFF_UP) == 0) 157 return (EJUSTRETURN); 158 159 /* 160 * If we're not doing autonegotiation, we don't need to do 161 * any extra work here. However, we need to check the link 162 * status so we can generate an announcement if the status 163 * changes. 164 */ 165 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 166 return (0); 167 168 /* 169 * check for link. 170 * Read the status register twice; BMSR_LINK is latch-low. 171 */ 172 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 173 if (reg & BMSR_LINK) 174 return (0); 175 176 /* 177 * Only retry autonegotiation every 5 seconds. 178 */ 179 if (++sc->mii_ticks != 5) 180 return (EJUSTRETURN); 181 182 sc->mii_ticks = 0; 183 mii_phy_reset(sc); 184 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 185 return (EJUSTRETURN); 186 187 /* 188 * Might need to generate a status message if autonegotiation 189 * failed. 190 */ 191 return (0); 192 } 193 194 void 195 mii_phy_reset(mii) 196 struct mii_softc *mii; 197 { 198 int reg, i; 199 200 if (mii->mii_flags & MIIF_NOISOLATE) 201 reg = BMCR_RESET; 202 else 203 reg = BMCR_RESET | BMCR_ISO; 204 PHY_WRITE(mii, MII_BMCR, reg); 205 206 /* Wait 100ms for it to complete. */ 207 for (i = 0; i < 100; i++) { 208 reg = PHY_READ(mii, MII_BMCR); 209 if ((reg & BMCR_RESET) == 0) 210 break; 211 DELAY(1000); 212 } 213 214 if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) 215 PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); 216 } 217 218 void 219 mii_phy_update(sc, cmd) 220 struct mii_softc *sc; 221 int cmd; 222 { 223 struct mii_data *mii = sc->mii_pdata; 224 225 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 226 MIIBUS_STATCHG(sc->mii_dev); 227 sc->mii_active = mii->mii_media_active; 228 } 229 if (sc->mii_status != mii->mii_media_status) { 230 MIIBUS_LINKCHG(sc->mii_dev); 231 sc->mii_status = mii->mii_media_status; 232 } 233 } 234 235 /* 236 * Given an ifmedia word, return the corresponding ANAR value. 237 */ 238 int 239 mii_anar(media) 240 int media; 241 { 242 int rv; 243 244 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 245 case IFM_ETHER|IFM_10_T: 246 rv = ANAR_10|ANAR_CSMA; 247 break; 248 case IFM_ETHER|IFM_10_T|IFM_FDX: 249 rv = ANAR_10_FD|ANAR_CSMA; 250 break; 251 case IFM_ETHER|IFM_100_TX: 252 rv = ANAR_TX|ANAR_CSMA; 253 break; 254 case IFM_ETHER|IFM_100_TX|IFM_FDX: 255 rv = ANAR_TX_FD|ANAR_CSMA; 256 break; 257 case IFM_ETHER|IFM_100_T4: 258 rv = ANAR_T4|ANAR_CSMA; 259 break; 260 default: 261 rv = 0; 262 break; 263 } 264 265 return (rv); 266 } 267 268 /* 269 * Given a BMCR value, return the corresponding ifmedia word. 270 */ 271 int 272 mii_media_from_bmcr(bmcr) 273 int bmcr; 274 { 275 int rv = IFM_ETHER; 276 277 if (bmcr & BMCR_S100) 278 rv |= IFM_100_TX; 279 else 280 rv |= IFM_10_T; 281 if (bmcr & BMCR_FDX) 282 rv |= IFM_FDX; 283 284 return (rv); 285 } 286 287 /* 288 * Initialize generic PHY media based on BMSR, called when a PHY is 289 * attached. We expect to be set up to print a comma-separated list 290 * of media names. Does not print a newline. 291 */ 292 void 293 mii_add_media(mii, bmsr, instance) 294 struct mii_data *mii; 295 int bmsr, instance; 296 { 297 const char *sep = ""; 298 299 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 300 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 301 302 if (bmsr & BMSR_10THDX) { 303 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 304 PRINT("10baseT"); 305 } 306 if (bmsr & BMSR_10TFDX) { 307 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 308 BMCR_FDX); 309 PRINT("10baseT-FDX"); 310 } 311 if (bmsr & BMSR_100TXHDX) { 312 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 313 BMCR_S100); 314 PRINT("100baseTX"); 315 } 316 if (bmsr & BMSR_100TXFDX) { 317 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 318 BMCR_S100|BMCR_FDX); 319 PRINT("100baseTX-FDX"); 320 } 321 if (bmsr & BMSR_100T4) { 322 /* 323 * XXX How do you enable 100baseT4? I assume we set 324 * XXX BMCR_S100 and then assume the PHYs will take 325 * XXX watever action is necessary to switch themselves 326 * XXX into T4 mode. 327 */ 328 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 329 BMCR_S100); 330 PRINT("100baseT4"); 331 } 332 if (bmsr & BMSR_ANEG) { 333 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 334 BMCR_AUTOEN); 335 PRINT("auto"); 336 } 337 #undef ADD 338 #undef PRINT 339 } 340