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 1.5 2004/09/18 19:32:59 dillon 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 void 68 mii_softc_init(struct mii_softc *mii) 69 { 70 callout_init(&mii->mii_auto_ch); 71 } 72 73 int 74 mii_phy_auto(mii, waitfor) 75 struct mii_softc *mii; 76 int waitfor; 77 { 78 int bmsr, i; 79 80 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 81 PHY_WRITE(mii, MII_ANAR, 82 BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA); 83 PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 84 } 85 86 if (waitfor) { 87 /* Wait 500ms for it to complete. */ 88 for (i = 0; i < 500; i++) { 89 if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP) 90 return (0); 91 DELAY(1000); 92 #if 0 93 if ((bmsr & BMSR_ACOMP) == 0) 94 printf("%s: autonegotiation failed to complete\n", 95 mii->mii_dev.dv_xname); 96 #endif 97 } 98 99 /* 100 * Don't need to worry about clearing MIIF_DOINGAUTO. 101 * If that's set, a timeout is pending, and it will 102 * clear the flag. 103 */ 104 return (EIO); 105 } 106 107 /* 108 * Just let it finish asynchronously. This is for the benefit of 109 * the tick handler driving autonegotiation. Don't want 500ms 110 * delays all the time while the system is running! 111 */ 112 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 113 mii->mii_flags |= MIIF_DOINGAUTO; 114 callout_reset(&mii->mii_auto_ch, hz >> 1, 115 mii_phy_auto_timeout, mii); 116 } 117 return (EJUSTRETURN); 118 } 119 120 void 121 mii_phy_auto_stop(sc) 122 struct mii_softc *sc; 123 { 124 if (sc->mii_flags & MIIF_DOINGAUTO) { 125 sc->mii_flags &= ~MIIF_DOINGAUTO; 126 callout_stop(&sc->mii_auto_ch); 127 } 128 } 129 130 void 131 mii_phy_auto_timeout(arg) 132 void *arg; 133 { 134 struct mii_softc *mii = arg; 135 int s, bmsr; 136 137 s = splnet(); 138 mii->mii_flags &= ~MIIF_DOINGAUTO; 139 bmsr = PHY_READ(mii, MII_BMSR); 140 #if 0 141 if ((bmsr & BMSR_ACOMP) == 0) 142 printf("%s: autonegotiation failed to complete\n", 143 sc->sc_dev.dv_xname); 144 #endif 145 146 /* Update the media status. */ 147 (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); 148 splx(s); 149 } 150 151 void 152 mii_phy_reset(mii) 153 struct mii_softc *mii; 154 { 155 int reg, i; 156 157 if (mii->mii_flags & MIIF_NOISOLATE) 158 reg = BMCR_RESET; 159 else 160 reg = BMCR_RESET | BMCR_ISO; 161 PHY_WRITE(mii, MII_BMCR, reg); 162 163 /* Wait 100ms for it to complete. */ 164 for (i = 0; i < 100; i++) { 165 reg = PHY_READ(mii, MII_BMCR); 166 if ((reg & BMCR_RESET) == 0) 167 break; 168 DELAY(1000); 169 } 170 171 if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) 172 PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); 173 } 174 175 /* 176 * Given an ifmedia word, return the corresponding ANAR value. 177 */ 178 int 179 mii_anar(media) 180 int media; 181 { 182 int rv; 183 184 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 185 case IFM_ETHER|IFM_10_T: 186 rv = ANAR_10|ANAR_CSMA; 187 break; 188 case IFM_ETHER|IFM_10_T|IFM_FDX: 189 rv = ANAR_10_FD|ANAR_CSMA; 190 break; 191 case IFM_ETHER|IFM_100_TX: 192 rv = ANAR_TX|ANAR_CSMA; 193 break; 194 case IFM_ETHER|IFM_100_TX|IFM_FDX: 195 rv = ANAR_TX_FD|ANAR_CSMA; 196 break; 197 case IFM_ETHER|IFM_100_T4: 198 rv = ANAR_T4|ANAR_CSMA; 199 break; 200 default: 201 rv = 0; 202 break; 203 } 204 205 return (rv); 206 } 207 208 /* 209 * Given a BMCR value, return the corresponding ifmedia word. 210 */ 211 int 212 mii_media_from_bmcr(bmcr) 213 int bmcr; 214 { 215 int rv = IFM_ETHER; 216 217 if (bmcr & BMCR_S100) 218 rv |= IFM_100_TX; 219 else 220 rv |= IFM_10_T; 221 if (bmcr & BMCR_FDX) 222 rv |= IFM_FDX; 223 224 return (rv); 225 } 226 227 /* 228 * Initialize generic PHY media based on BMSR, called when a PHY is 229 * attached. We expect to be set up to print a comma-separated list 230 * of media names. Does not print a newline. 231 */ 232 void 233 mii_add_media(mii, bmsr, instance) 234 struct mii_data *mii; 235 int bmsr, instance; 236 { 237 const char *sep = ""; 238 239 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 240 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 241 242 if (bmsr & BMSR_10THDX) { 243 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 244 PRINT("10baseT"); 245 } 246 if (bmsr & BMSR_10TFDX) { 247 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 248 BMCR_FDX); 249 PRINT("10baseT-FDX"); 250 } 251 if (bmsr & BMSR_100TXHDX) { 252 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 253 BMCR_S100); 254 PRINT("100baseTX"); 255 } 256 if (bmsr & BMSR_100TXFDX) { 257 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 258 BMCR_S100|BMCR_FDX); 259 PRINT("100baseTX-FDX"); 260 } 261 if (bmsr & BMSR_100T4) { 262 /* 263 * XXX How do you enable 100baseT4? I assume we set 264 * XXX BMCR_S100 and then assume the PHYs will take 265 * XXX watever action is necessary to switch themselves 266 * XXX into T4 mode. 267 */ 268 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 269 BMCR_S100); 270 PRINT("100baseT4"); 271 } 272 if (bmsr & BMSR_ANEG) { 273 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 274 BMCR_AUTOEN); 275 PRINT("auto"); 276 } 277 #undef ADD 278 #undef PRINT 279 } 280