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 #include <machine/clock.h> 53 54 #include <net/if.h> 55 #include <net/if_media.h> 56 57 #include <dev/mii/mii.h> 58 #include <dev/mii/miivar.h> 59 60 #include "miibus_if.h" 61 62 #if !defined(lint) 63 static const char rcsid[] = 64 "$FreeBSD: src/sys/dev/mii/mii_physubr.c,v 1.2.2.1 2000/12/12 19:29:14 wpaul Exp $"; 65 #endif 66 67 void mii_phy_auto_timeout __P((void *)); 68 69 int 70 mii_phy_auto(mii, waitfor) 71 struct mii_softc *mii; 72 int waitfor; 73 { 74 int bmsr, i; 75 76 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 77 PHY_WRITE(mii, MII_ANAR, 78 BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA); 79 PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 80 } 81 82 if (waitfor) { 83 /* Wait 500ms for it to complete. */ 84 for (i = 0; i < 500; i++) { 85 if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP) 86 return (0); 87 DELAY(1000); 88 #if 0 89 if ((bmsr & BMSR_ACOMP) == 0) 90 printf("%s: autonegotiation failed to complete\n", 91 mii->mii_dev.dv_xname); 92 #endif 93 } 94 95 /* 96 * Don't need to worry about clearing MIIF_DOINGAUTO. 97 * If that's set, a timeout is pending, and it will 98 * clear the flag. 99 */ 100 return (EIO); 101 } 102 103 /* 104 * Just let it finish asynchronously. This is for the benefit of 105 * the tick handler driving autonegotiation. Don't want 500ms 106 * delays all the time while the system is running! 107 */ 108 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 109 mii->mii_flags |= MIIF_DOINGAUTO; 110 mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1); 111 } 112 return (EJUSTRETURN); 113 } 114 115 void 116 mii_phy_auto_stop(sc) 117 struct mii_softc *sc; 118 { 119 if (sc->mii_flags & MIIF_DOINGAUTO) { 120 sc->mii_flags &= ~MIIF_DOINGAUTO; 121 untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch); 122 } 123 } 124 125 void 126 mii_phy_auto_timeout(arg) 127 void *arg; 128 { 129 struct mii_softc *mii = arg; 130 int s, bmsr; 131 132 s = splnet(); 133 mii->mii_flags &= ~MIIF_DOINGAUTO; 134 bmsr = PHY_READ(mii, MII_BMSR); 135 #if 0 136 if ((bmsr & BMSR_ACOMP) == 0) 137 printf("%s: autonegotiation failed to complete\n", 138 sc->sc_dev.dv_xname); 139 #endif 140 141 /* Update the media status. */ 142 (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); 143 splx(s); 144 } 145 146 void 147 mii_phy_reset(mii) 148 struct mii_softc *mii; 149 { 150 int reg, i; 151 152 if (mii->mii_flags & MIIF_NOISOLATE) 153 reg = BMCR_RESET; 154 else 155 reg = BMCR_RESET | BMCR_ISO; 156 PHY_WRITE(mii, MII_BMCR, reg); 157 158 /* Wait 100ms for it to complete. */ 159 for (i = 0; i < 100; i++) { 160 reg = PHY_READ(mii, MII_BMCR); 161 if ((reg & BMCR_RESET) == 0) 162 break; 163 DELAY(1000); 164 } 165 166 if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) 167 PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); 168 } 169 170 /* 171 * Given an ifmedia word, return the corresponding ANAR value. 172 */ 173 int 174 mii_anar(media) 175 int media; 176 { 177 int rv; 178 179 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 180 case IFM_ETHER|IFM_10_T: 181 rv = ANAR_10|ANAR_CSMA; 182 break; 183 case IFM_ETHER|IFM_10_T|IFM_FDX: 184 rv = ANAR_10_FD|ANAR_CSMA; 185 break; 186 case IFM_ETHER|IFM_100_TX: 187 rv = ANAR_TX|ANAR_CSMA; 188 break; 189 case IFM_ETHER|IFM_100_TX|IFM_FDX: 190 rv = ANAR_TX_FD|ANAR_CSMA; 191 break; 192 case IFM_ETHER|IFM_100_T4: 193 rv = ANAR_T4|ANAR_CSMA; 194 break; 195 default: 196 rv = 0; 197 break; 198 } 199 200 return (rv); 201 } 202 203 /* 204 * Given a BMCR value, return the corresponding ifmedia word. 205 */ 206 int 207 mii_media_from_bmcr(bmcr) 208 int bmcr; 209 { 210 int rv = IFM_ETHER; 211 212 if (bmcr & BMCR_S100) 213 rv |= IFM_100_TX; 214 else 215 rv |= IFM_10_T; 216 if (bmcr & BMCR_FDX) 217 rv |= IFM_FDX; 218 219 return (rv); 220 } 221 222 /* 223 * Initialize generic PHY media based on BMSR, called when a PHY is 224 * attached. We expect to be set up to print a comma-separated list 225 * of media names. Does not print a newline. 226 */ 227 void 228 mii_add_media(mii, bmsr, instance) 229 struct mii_data *mii; 230 int bmsr, instance; 231 { 232 const char *sep = ""; 233 234 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 235 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 236 237 if (bmsr & BMSR_10THDX) { 238 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 239 PRINT("10baseT"); 240 } 241 if (bmsr & BMSR_10TFDX) { 242 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 243 BMCR_FDX); 244 PRINT("10baseT-FDX"); 245 } 246 if (bmsr & BMSR_100TXHDX) { 247 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 248 BMCR_S100); 249 PRINT("100baseTX"); 250 } 251 if (bmsr & BMSR_100TXFDX) { 252 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 253 BMCR_S100|BMCR_FDX); 254 PRINT("100baseTX-FDX"); 255 } 256 if (bmsr & BMSR_100T4) { 257 /* 258 * XXX How do you enable 100baseT4? I assume we set 259 * XXX BMCR_S100 and then assume the PHYs will take 260 * XXX watever action is necessary to switch themselves 261 * XXX into T4 mode. 262 */ 263 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 264 BMCR_S100); 265 PRINT("100baseT4"); 266 } 267 if (bmsr & BMSR_ANEG) { 268 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 269 BMCR_AUTOEN); 270 PRINT("auto"); 271 } 272 #undef ADD 273 #undef PRINT 274 } 275