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 1.11 2005/12/11 01:54:08 swildner 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(struct mii_softc *mii, int waitfor) 78 { 79 int bmsr, i; 80 81 if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 82 PHY_WRITE(mii, MII_ANAR, mii_bmsr_media_to_anar(mii)); 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(struct mii_softc *sc) 122 { 123 if (sc->mii_flags & MIIF_DOINGAUTO) { 124 sc->mii_flags &= ~MIIF_DOINGAUTO; 125 callout_stop(&sc->mii_auto_ch); 126 } 127 } 128 129 void 130 mii_phy_auto_timeout(void *arg) 131 { 132 struct mii_softc *mii = arg; 133 int bmsr; 134 135 crit_enter(); 136 137 mii->mii_flags &= ~MIIF_DOINGAUTO; 138 bmsr = PHY_READ(mii, MII_BMSR); 139 #if 0 140 if ((bmsr & BMSR_ACOMP) == 0) 141 printf("%s: autonegotiation failed to complete\n", 142 sc->sc_dev.dv_xname); 143 #endif 144 145 /* Update the media status. */ 146 (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); 147 148 crit_exit(); 149 } 150 151 void 152 mii_phy_reset(struct mii_softc *mii) 153 { 154 int reg, i; 155 156 if (mii->mii_flags & MIIF_NOISOLATE) 157 reg = BMCR_RESET; 158 else 159 reg = BMCR_RESET | BMCR_ISO; 160 PHY_WRITE(mii, MII_BMCR, reg); 161 162 /* Wait 100ms for it to complete. */ 163 for (i = 0; i < 100; i++) { 164 reg = PHY_READ(mii, MII_BMCR); 165 if ((reg & BMCR_RESET) == 0) 166 break; 167 DELAY(1000); 168 } 169 170 if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) 171 PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); 172 } 173 174 /* 175 * Given an ifmedia word, return the corresponding ANAR value. 176 */ 177 int 178 mii_anar(int media) 179 { 180 int rv; 181 182 rv = ANAR_CSMA; 183 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 184 case IFM_ETHER|IFM_1000_T: 185 rv |= ANAR_1000; 186 break; 187 case IFM_ETHER|IFM_1000_T|IFM_FDX: 188 rv |= ANAR_1000_FD; 189 break; 190 case IFM_ETHER|IFM_10_T: 191 rv |= ANAR_10; 192 break; 193 case IFM_ETHER|IFM_10_T|IFM_FDX: 194 rv |= ANAR_10_FD; 195 break; 196 case IFM_ETHER|IFM_100_TX: 197 rv |= ANAR_TX; 198 break; 199 case IFM_ETHER|IFM_100_TX|IFM_FDX: 200 rv |= ANAR_TX_FD; 201 break; 202 case IFM_ETHER|IFM_100_T4: 203 rv |= ANAR_T4; 204 break; 205 default: 206 rv = 0; 207 break; 208 } 209 return (rv); 210 } 211 212 /* 213 * Given a BMCR value, return the corresponding ifmedia word. 214 */ 215 int 216 mii_media_from_bmcr(int bmcr) 217 { 218 int rv = IFM_ETHER; 219 220 if (bmcr & BMCR_S100) 221 rv |= IFM_100_TX; 222 else 223 rv |= IFM_10_T; 224 if (bmcr & BMCR_FDX) 225 rv |= IFM_FDX; 226 227 return (rv); 228 } 229 230 /* 231 * Initialize generic PHY media based on BMSR, called when a PHY is 232 * attached. We expect to be set up to print a comma-separated list 233 * of media names. Does not print a newline. 234 */ 235 void 236 mii_add_media(struct mii_softc *sc, int bmsr) 237 { 238 struct mii_data *mii = sc->mii_pdata; 239 int instance = sc->mii_inst; 240 const char *sep = ""; 241 242 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 243 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 244 245 if (bmsr & BMSR_10THDX) { 246 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 247 PRINT("10baseT"); 248 } 249 if (bmsr & BMSR_10TFDX) { 250 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 251 BMCR_FDX); 252 PRINT("10baseT-FDX"); 253 } 254 if (bmsr & BMSR_100TXHDX) { 255 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 256 BMCR_S100); 257 PRINT("100baseTX"); 258 } 259 if (bmsr & BMSR_100TXFDX) { 260 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 261 BMCR_S100|BMCR_FDX); 262 PRINT("100baseTX-FDX"); 263 } 264 if (bmsr & BMSR_100T4) { 265 /* 266 * XXX How do you enable 100baseT4? I assume we set 267 * XXX BMCR_S100 and then assume the PHYs will take 268 * XXX watever action is necessary to switch themselves 269 * XXX into T4 mode. 270 */ 271 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 272 BMCR_S100); 273 PRINT("100baseT4"); 274 } 275 if (sc->mii_flags & MIIF_IS_1000X) { 276 if (bmsr & BMSR_1000) { 277 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX, 278 instance), BMCR_S1000); 279 PRINT("1000baseT-FDX"); 280 } 281 } 282 if (bmsr & BMSR_ANEG) { 283 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 284 BMCR_AUTOEN); 285 PRINT("auto"); 286 } 287 #undef ADD 288 #undef PRINT 289 } 290 291 int 292 mii_bmsr_media_to_anar(struct mii_softc *mii) 293 { 294 int bmsr = mii->mii_capabilities; 295 int res = ANAR_CSMA; 296 297 if (bmsr & BMSR_100T4) 298 res |= ANAR_T4; 299 if (bmsr & BMSR_100TXFDX) 300 res |= ANAR_TX_FD; 301 if (bmsr & BMSR_100TXHDX) 302 res |= ANAR_TX; 303 if (bmsr & BMSR_10TFDX) 304 res |= ANAR_10_FD; 305 if (bmsr & BMSR_10THDX) 306 res |= ANAR_10; 307 if (mii->mii_flags & MIIF_IS_1000X) { 308 if (bmsr & BMSR_1000) 309 res |= ANAR_1000_FD; 310 } 311 return (res); 312 } 313