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 1.10 2005/10/31 12:49:05 sephe 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 #include <sys/thread2.h> 55 56 #include <machine/clock.h> 57 58 #include <net/if.h> 59 #include <net/if_media.h> 60 61 #include "mii.h" 62 #include "miivar.h" 63 64 #include "miibus_if.h" 65 66 void mii_phy_auto_timeout (void *); 67 68 void 69 mii_softc_init(struct mii_softc *mii, struct mii_attach_args *ma) 70 { 71 callout_init(&mii->mii_auto_ch); 72 mii->mii_phy = ma->mii_phyno; 73 mii->mii_flags |= ma->mii_flags; 74 } 75 76 int 77 mii_phy_auto(mii, waitfor) 78 struct mii_softc *mii; 79 int waitfor; 80 { 81 int bmsr, i; 82 83 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 84 PHY_WRITE(mii, MII_ANAR, mii_bmsr_media_to_anar(mii)); 85 PHY_WRITE(mii, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 86 } 87 88 if (waitfor) { 89 /* Wait 500ms for it to complete. */ 90 for (i = 0; i < 500; i++) { 91 if ((bmsr = PHY_READ(mii, MII_BMSR)) & BMSR_ACOMP) 92 return (0); 93 DELAY(1000); 94 #if 0 95 if ((bmsr & BMSR_ACOMP) == 0) 96 printf("%s: autonegotiation failed to complete\n", 97 mii->mii_dev.dv_xname); 98 #endif 99 } 100 101 /* 102 * Don't need to worry about clearing MIIF_DOINGAUTO. 103 * If that's set, a timeout is pending, and it will 104 * clear the flag. 105 */ 106 return (EIO); 107 } 108 109 /* 110 * Just let it finish asynchronously. This is for the benefit of 111 * the tick handler driving autonegotiation. Don't want 500ms 112 * delays all the time while the system is running! 113 */ 114 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 115 mii->mii_flags |= MIIF_DOINGAUTO; 116 callout_reset(&mii->mii_auto_ch, hz >> 1, 117 mii_phy_auto_timeout, mii); 118 } 119 return (EJUSTRETURN); 120 } 121 122 void 123 mii_phy_auto_stop(sc) 124 struct mii_softc *sc; 125 { 126 if (sc->mii_flags & MIIF_DOINGAUTO) { 127 sc->mii_flags &= ~MIIF_DOINGAUTO; 128 callout_stop(&sc->mii_auto_ch); 129 } 130 } 131 132 void 133 mii_phy_auto_timeout(arg) 134 void *arg; 135 { 136 struct mii_softc *mii = arg; 137 int bmsr; 138 139 crit_enter(); 140 141 mii->mii_flags &= ~MIIF_DOINGAUTO; 142 bmsr = PHY_READ(mii, MII_BMSR); 143 #if 0 144 if ((bmsr & BMSR_ACOMP) == 0) 145 printf("%s: autonegotiation failed to complete\n", 146 sc->sc_dev.dv_xname); 147 #endif 148 149 /* Update the media status. */ 150 (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); 151 152 crit_exit(); 153 } 154 155 void 156 mii_phy_reset(mii) 157 struct mii_softc *mii; 158 { 159 int reg, i; 160 161 if (mii->mii_flags & MIIF_NOISOLATE) 162 reg = BMCR_RESET; 163 else 164 reg = BMCR_RESET | BMCR_ISO; 165 PHY_WRITE(mii, MII_BMCR, reg); 166 167 /* Wait 100ms for it to complete. */ 168 for (i = 0; i < 100; i++) { 169 reg = PHY_READ(mii, MII_BMCR); 170 if ((reg & BMCR_RESET) == 0) 171 break; 172 DELAY(1000); 173 } 174 175 if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) 176 PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); 177 } 178 179 /* 180 * Given an ifmedia word, return the corresponding ANAR value. 181 */ 182 int 183 mii_anar(int media) 184 { 185 int rv; 186 187 rv = ANAR_CSMA; 188 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 189 case IFM_ETHER|IFM_1000_T: 190 rv |= ANAR_1000; 191 break; 192 case IFM_ETHER|IFM_1000_T|IFM_FDX: 193 rv |= ANAR_1000_FD; 194 break; 195 case IFM_ETHER|IFM_10_T: 196 rv |= ANAR_10; 197 break; 198 case IFM_ETHER|IFM_10_T|IFM_FDX: 199 rv |= ANAR_10_FD; 200 break; 201 case IFM_ETHER|IFM_100_TX: 202 rv |= ANAR_TX; 203 break; 204 case IFM_ETHER|IFM_100_TX|IFM_FDX: 205 rv |= ANAR_TX_FD; 206 break; 207 case IFM_ETHER|IFM_100_T4: 208 rv |= ANAR_T4; 209 break; 210 default: 211 rv = 0; 212 break; 213 } 214 return (rv); 215 } 216 217 /* 218 * Given a BMCR value, return the corresponding ifmedia word. 219 */ 220 int 221 mii_media_from_bmcr(bmcr) 222 int bmcr; 223 { 224 int rv = IFM_ETHER; 225 226 if (bmcr & BMCR_S100) 227 rv |= IFM_100_TX; 228 else 229 rv |= IFM_10_T; 230 if (bmcr & BMCR_FDX) 231 rv |= IFM_FDX; 232 233 return (rv); 234 } 235 236 /* 237 * Initialize generic PHY media based on BMSR, called when a PHY is 238 * attached. We expect to be set up to print a comma-separated list 239 * of media names. Does not print a newline. 240 */ 241 void 242 mii_add_media(struct mii_softc *sc, int bmsr) 243 { 244 struct mii_data *mii = sc->mii_pdata; 245 int instance = sc->mii_inst; 246 const char *sep = ""; 247 248 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 249 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 250 251 if (bmsr & BMSR_10THDX) { 252 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 253 PRINT("10baseT"); 254 } 255 if (bmsr & BMSR_10TFDX) { 256 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 257 BMCR_FDX); 258 PRINT("10baseT-FDX"); 259 } 260 if (bmsr & BMSR_100TXHDX) { 261 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 262 BMCR_S100); 263 PRINT("100baseTX"); 264 } 265 if (bmsr & BMSR_100TXFDX) { 266 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 267 BMCR_S100|BMCR_FDX); 268 PRINT("100baseTX-FDX"); 269 } 270 if (bmsr & BMSR_100T4) { 271 /* 272 * XXX How do you enable 100baseT4? I assume we set 273 * XXX BMCR_S100 and then assume the PHYs will take 274 * XXX watever action is necessary to switch themselves 275 * XXX into T4 mode. 276 */ 277 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 278 BMCR_S100); 279 PRINT("100baseT4"); 280 } 281 if (sc->mii_flags & MIIF_IS_1000X) { 282 if (bmsr & BMSR_1000) { 283 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 284 instance), BMCR_S1000); 285 PRINT("1000baseT-FDX"); 286 } 287 } 288 if (bmsr & BMSR_ANEG) { 289 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 290 BMCR_AUTOEN); 291 PRINT("auto"); 292 } 293 #undef ADD 294 #undef PRINT 295 } 296 297 int 298 mii_bmsr_media_to_anar(struct mii_softc *mii) 299 { 300 int bmsr = mii->mii_capabilities; 301 int res = ANAR_CSMA; 302 303 if (bmsr & BMSR_100T4) 304 res |= ANAR_T4; 305 if (bmsr & BMSR_100TXFDX) 306 res |= ANAR_TX_FD; 307 if (bmsr & BMSR_100TXHDX) 308 res |= ANAR_TX; 309 if (bmsr & BMSR_10TFDX) 310 res |= ANAR_10_FD; 311 if (bmsr & BMSR_10THDX) 312 res |= ANAR_10; 313 if (mii->mii_flags & MIIF_IS_1000X) { 314 if (bmsr & BMSR_1000) 315 res |= ANAR_1000_FD; 316 } 317 return (res); 318 } 319