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 * $FreeBSD: src/sys/dev/mii/mii_physubr.c,v 1.2.2.1 2000/12/12 19:29:14 wpaul Exp $ 40 * $DragonFly: src/sys/dev/netif/mii_layer/mii_physubr.c,v 1.4 2003/08/27 09:38:31 rob Exp $ 41 */ 42 43 /* 44 * Subroutines common to all PHYs. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/kernel.h> 50 #include <sys/socket.h> 51 #include <sys/errno.h> 52 #include <sys/module.h> 53 #include <sys/bus.h> 54 55 #include <machine/clock.h> 56 57 #include <net/if.h> 58 #include <net/if_media.h> 59 60 #include "mii.h" 61 #include "miivar.h" 62 63 #include "miibus_if.h" 64 65 void mii_phy_auto_timeout (void *); 66 67 int 68 mii_phy_auto(mii, waitfor) 69 struct mii_softc *mii; 70 int waitfor; 71 { 72 int bmsr, i; 73 74 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 75 PHY_WRITE(mii, MII_ANAR, 76 BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA); 77 PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 78 } 79 80 if (waitfor) { 81 /* Wait 500ms for it to complete. */ 82 for (i = 0; i < 500; i++) { 83 if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP) 84 return (0); 85 DELAY(1000); 86 #if 0 87 if ((bmsr & BMSR_ACOMP) == 0) 88 printf("%s: autonegotiation failed to complete\n", 89 mii->mii_dev.dv_xname); 90 #endif 91 } 92 93 /* 94 * Don't need to worry about clearing MIIF_DOINGAUTO. 95 * If that's set, a timeout is pending, and it will 96 * clear the flag. 97 */ 98 return (EIO); 99 } 100 101 /* 102 * Just let it finish asynchronously. This is for the benefit of 103 * the tick handler driving autonegotiation. Don't want 500ms 104 * delays all the time while the system is running! 105 */ 106 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 107 mii->mii_flags |= MIIF_DOINGAUTO; 108 mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1); 109 } 110 return (EJUSTRETURN); 111 } 112 113 void 114 mii_phy_auto_stop(sc) 115 struct mii_softc *sc; 116 { 117 if (sc->mii_flags & MIIF_DOINGAUTO) { 118 sc->mii_flags &= ~MIIF_DOINGAUTO; 119 untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch); 120 } 121 } 122 123 void 124 mii_phy_auto_timeout(arg) 125 void *arg; 126 { 127 struct mii_softc *mii = arg; 128 int s, bmsr; 129 130 s = splnet(); 131 mii->mii_flags &= ~MIIF_DOINGAUTO; 132 bmsr = PHY_READ(mii, MII_BMSR); 133 #if 0 134 if ((bmsr & BMSR_ACOMP) == 0) 135 printf("%s: autonegotiation failed to complete\n", 136 sc->sc_dev.dv_xname); 137 #endif 138 139 /* Update the media status. */ 140 (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); 141 splx(s); 142 } 143 144 void 145 mii_phy_reset(mii) 146 struct mii_softc *mii; 147 { 148 int reg, i; 149 150 if (mii->mii_flags & MIIF_NOISOLATE) 151 reg = BMCR_RESET; 152 else 153 reg = BMCR_RESET | BMCR_ISO; 154 PHY_WRITE(mii, MII_BMCR, reg); 155 156 /* Wait 100ms for it to complete. */ 157 for (i = 0; i < 100; i++) { 158 reg = PHY_READ(mii, MII_BMCR); 159 if ((reg & BMCR_RESET) == 0) 160 break; 161 DELAY(1000); 162 } 163 164 if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) 165 PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); 166 } 167 168 /* 169 * Given an ifmedia word, return the corresponding ANAR value. 170 */ 171 int 172 mii_anar(media) 173 int media; 174 { 175 int rv; 176 177 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 178 case IFM_ETHER|IFM_10_T: 179 rv = ANAR_10|ANAR_CSMA; 180 break; 181 case IFM_ETHER|IFM_10_T|IFM_FDX: 182 rv = ANAR_10_FD|ANAR_CSMA; 183 break; 184 case IFM_ETHER|IFM_100_TX: 185 rv = ANAR_TX|ANAR_CSMA; 186 break; 187 case IFM_ETHER|IFM_100_TX|IFM_FDX: 188 rv = ANAR_TX_FD|ANAR_CSMA; 189 break; 190 case IFM_ETHER|IFM_100_T4: 191 rv = ANAR_T4|ANAR_CSMA; 192 break; 193 default: 194 rv = 0; 195 break; 196 } 197 198 return (rv); 199 } 200 201 /* 202 * Given a BMCR value, return the corresponding ifmedia word. 203 */ 204 int 205 mii_media_from_bmcr(bmcr) 206 int bmcr; 207 { 208 int rv = IFM_ETHER; 209 210 if (bmcr & BMCR_S100) 211 rv |= IFM_100_TX; 212 else 213 rv |= IFM_10_T; 214 if (bmcr & BMCR_FDX) 215 rv |= IFM_FDX; 216 217 return (rv); 218 } 219 220 /* 221 * Initialize generic PHY media based on BMSR, called when a PHY is 222 * attached. We expect to be set up to print a comma-separated list 223 * of media names. Does not print a newline. 224 */ 225 void 226 mii_add_media(mii, bmsr, instance) 227 struct mii_data *mii; 228 int bmsr, instance; 229 { 230 const char *sep = ""; 231 232 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 233 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 234 235 if (bmsr & BMSR_10THDX) { 236 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 237 PRINT("10baseT"); 238 } 239 if (bmsr & BMSR_10TFDX) { 240 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 241 BMCR_FDX); 242 PRINT("10baseT-FDX"); 243 } 244 if (bmsr & BMSR_100TXHDX) { 245 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 246 BMCR_S100); 247 PRINT("100baseTX"); 248 } 249 if (bmsr & BMSR_100TXFDX) { 250 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 251 BMCR_S100|BMCR_FDX); 252 PRINT("100baseTX-FDX"); 253 } 254 if (bmsr & BMSR_100T4) { 255 /* 256 * XXX How do you enable 100baseT4? I assume we set 257 * XXX BMCR_S100 and then assume the PHYs will take 258 * XXX watever action is necessary to switch themselves 259 * XXX into T4 mode. 260 */ 261 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 262 BMCR_S100); 263 PRINT("100baseT4"); 264 } 265 if (bmsr & BMSR_ANEG) { 266 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 267 BMCR_AUTOEN); 268 PRINT("auto"); 269 } 270 #undef ADD 271 #undef PRINT 272 } 273