mii_physubr.c revision 50120
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) 63static const char rcsid[] = 64 "$Id$"; 65#endif 66 67void mii_phy_auto_timeout __P((void *)); 68 69int 70mii_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 timeout(mii_phy_auto_timeout, mii, hz >> 1); 111 } 112 return (EJUSTRETURN); 113} 114 115void 116mii_phy_auto_timeout(arg) 117 void *arg; 118{ 119 struct mii_softc *mii = arg; 120 int s, bmsr; 121 122 s = splnet(); 123 mii->mii_flags &= ~MIIF_DOINGAUTO; 124 bmsr = PHY_READ(mii, MII_BMSR); 125#if 0 126 if ((bmsr & BMSR_ACOMP) == 0) 127 printf("%s: autonegotiation failed to complete\n", 128 sc->sc_dev.dv_xname); 129#endif 130 131 /* Update the media status. */ 132 (void) (*mii->mii_service)(mii, mii->mii_pdata, MII_POLLSTAT); 133 splx(s); 134} 135 136void 137mii_phy_reset(mii) 138 struct mii_softc *mii; 139{ 140 int reg, i; 141 142 if (mii->mii_flags & MIIF_NOISOLATE) 143 reg = BMCR_RESET; 144 else 145 reg = BMCR_RESET | BMCR_ISO; 146 PHY_WRITE(mii, MII_BMCR, reg); 147 148 /* Wait 100ms for it to complete. */ 149 for (i = 0; i < 100; i++) { 150 reg = PHY_READ(mii, MII_BMCR); 151 if ((reg & BMCR_RESET) == 0) 152 break; 153 DELAY(1000); 154 } 155 156 if (mii->mii_inst != 0 && ((mii->mii_flags & MIIF_NOISOLATE) == 0)) 157 PHY_WRITE(mii, MII_BMCR, reg | BMCR_ISO); 158} 159 160/* 161 * Given an ifmedia word, return the corresponding ANAR value. 162 */ 163int 164mii_anar(media) 165 int media; 166{ 167 int rv; 168 169 switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) { 170 case IFM_ETHER|IFM_10_T: 171 rv = ANAR_10|ANAR_CSMA; 172 break; 173 case IFM_ETHER|IFM_10_T|IFM_FDX: 174 rv = ANAR_10_FD|ANAR_CSMA; 175 break; 176 case IFM_ETHER|IFM_100_TX: 177 rv = ANAR_TX|ANAR_CSMA; 178 break; 179 case IFM_ETHER|IFM_100_TX|IFM_FDX: 180 rv = ANAR_TX_FD|ANAR_CSMA; 181 break; 182 case IFM_ETHER|IFM_100_T4: 183 rv = ANAR_T4|ANAR_CSMA; 184 break; 185 default: 186 rv = 0; 187 break; 188 } 189 190 return (rv); 191} 192 193/* 194 * Given a BMCR value, return the corresponding ifmedia word. 195 */ 196int 197mii_media_from_bmcr(bmcr) 198 int bmcr; 199{ 200 int rv = IFM_ETHER; 201 202 if (bmcr & BMCR_S100) 203 rv |= IFM_100_TX; 204 else 205 rv |= IFM_10_T; 206 if (bmcr & BMCR_FDX) 207 rv |= IFM_FDX; 208 209 return (rv); 210} 211 212/* 213 * Initialize generic PHY media based on BMSR, called when a PHY is 214 * attached. We expect to be set up to print a comma-separated list 215 * of media names. Does not print a newline. 216 */ 217void 218mii_add_media(mii, bmsr, instance) 219 struct mii_data *mii; 220 int bmsr, instance; 221{ 222 const char *sep = ""; 223 224#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 225#define PRINT(s) printf("%s%s", sep, s); sep = ", " 226 227 if (bmsr & BMSR_10THDX) { 228 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, instance), 0); 229 PRINT("10baseT"); 230 } 231 if (bmsr & BMSR_10TFDX) { 232 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, instance), 233 BMCR_FDX); 234 PRINT("10baseT-FDX"); 235 } 236 if (bmsr & BMSR_100TXHDX) { 237 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, instance), 238 BMCR_S100); 239 PRINT("100baseTX"); 240 } 241 if (bmsr & BMSR_100TXFDX) { 242 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, instance), 243 BMCR_S100|BMCR_FDX); 244 PRINT("100baseTX-FDX"); 245 } 246 if (bmsr & BMSR_100T4) { 247 /* 248 * XXX How do you enable 100baseT4? I assume we set 249 * XXX BMCR_S100 and then assume the PHYs will take 250 * XXX watever action is necessary to switch themselves 251 * XXX into T4 mode. 252 */ 253 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, instance), 254 BMCR_S100); 255 PRINT("100baseT4"); 256 } 257 if (bmsr & BMSR_ANEG) { 258 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, instance), 259 BMCR_AUTOEN); 260 PRINT("auto"); 261 } 262#undef ADD 263#undef PRINT 264} 265