Annotation of sys/dev/mii/mii_physubr.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: mii_physubr.c,v 1.32 2007/02/10 22:36:18 kettenis Exp $ */
! 2: /* $NetBSD: mii_physubr.c,v 1.20 2001/04/13 23:30:09 thorpej Exp $ */
! 3:
! 4: /*-
! 5: * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
! 6: * All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to The NetBSD Foundation
! 9: * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
! 10: * NASA Ames Research Center.
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. All advertising materials mentioning features or use of this software
! 21: * must display the following acknowledgement:
! 22: * This product includes software developed by the NetBSD
! 23: * Foundation, Inc. and its contributors.
! 24: * 4. Neither the name of The NetBSD Foundation nor the names of its
! 25: * contributors may be used to endorse or promote products derived
! 26: * from this software without specific prior written permission.
! 27: *
! 28: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 29: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 30: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 31: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 32: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 33: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 34: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 35: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 36: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 37: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 38: * POSSIBILITY OF SUCH DAMAGE.
! 39: */
! 40:
! 41: /*
! 42: * Subroutines common to all PHYs.
! 43: */
! 44:
! 45: #include <sys/param.h>
! 46: #include <sys/device.h>
! 47: #include <sys/systm.h>
! 48: #include <sys/kernel.h>
! 49: #include <sys/socket.h>
! 50: #include <sys/errno.h>
! 51: #include <sys/proc.h>
! 52:
! 53: #include <net/if.h>
! 54: #include <net/if_media.h>
! 55:
! 56: #include <dev/mii/mii.h>
! 57: #include <dev/mii/miivar.h>
! 58:
! 59: /*
! 60: * Media to register setting conversion table. Order matters.
! 61: * XXX 802.3 doesn't specify ANAR or ANLPAR bits for 1000base.
! 62: */
! 63: const struct mii_media mii_media_table[] = {
! 64: /* None */
! 65: { BMCR_ISO, ANAR_CSMA, 0 },
! 66: /* 10baseT */
! 67: { BMCR_S10, ANAR_CSMA|ANAR_10, 0 },
! 68: /* 10baseT-FDX */
! 69: { BMCR_S10|BMCR_FDX, ANAR_CSMA|ANAR_10_FD, 0 },
! 70: /* 100baseT4 */
! 71: { BMCR_S100, ANAR_CSMA|ANAR_T4, 0 },
! 72: /* 100baseTX */
! 73: { BMCR_S100, ANAR_CSMA|ANAR_TX, 0 },
! 74: /* 100baseTX-FDX */
! 75: { BMCR_S100|BMCR_FDX, ANAR_CSMA|ANAR_TX_FD, 0 },
! 76: /* 1000baseX */
! 77: { BMCR_S1000, ANAR_CSMA, 0 },
! 78: /* 1000baseX-FDX */
! 79: { BMCR_S1000|BMCR_FDX, ANAR_CSMA, 0 },
! 80: /* 1000baseT */
! 81: { BMCR_S1000, ANAR_CSMA, GTCR_ADV_1000THDX },
! 82: /* 1000baseT-FDX */
! 83: { BMCR_S1000|BMCR_FDX, ANAR_CSMA, GTCR_ADV_1000TFDX },
! 84: };
! 85:
! 86: void
! 87: mii_phy_setmedia(struct mii_softc *sc)
! 88: {
! 89: struct mii_data *mii = sc->mii_pdata;
! 90: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 91: int bmcr, anar, gtcr;
! 92:
! 93: if (IFM_SUBTYPE(ife->ifm_media) == IFM_AUTO) {
! 94: if ((PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) == 0 ||
! 95: (sc->mii_flags & MIIF_FORCEANEG))
! 96: (void) mii_phy_auto(sc, 1);
! 97: return;
! 98: }
! 99:
! 100: /*
! 101: * Table index is stored in the media entry.
! 102: */
! 103: #ifdef DIAGNOSTIC
! 104: if (ife->ifm_data < 0 || ife->ifm_data >= MII_NMEDIA)
! 105: panic("mii_phy_setmedia");
! 106: #endif
! 107:
! 108: anar = mii_media_table[ife->ifm_data].mm_anar;
! 109: bmcr = mii_media_table[ife->ifm_data].mm_bmcr;
! 110: gtcr = mii_media_table[ife->ifm_data].mm_gtcr;
! 111:
! 112: if (mii->mii_media.ifm_media & IFM_ETH_MASTER) {
! 113: switch (IFM_SUBTYPE(ife->ifm_media)) {
! 114: case IFM_1000_T:
! 115: gtcr |= GTCR_MAN_MS|GTCR_ADV_MS;
! 116: break;
! 117:
! 118: default:
! 119: panic("mii_phy_setmedia: MASTER on wrong media");
! 120: }
! 121: }
! 122:
! 123: if (ife->ifm_media & IFM_LOOP)
! 124: bmcr |= BMCR_LOOP;
! 125:
! 126: PHY_WRITE(sc, MII_ANAR, anar);
! 127: PHY_WRITE(sc, MII_BMCR, bmcr);
! 128: if (sc->mii_flags & MIIF_HAVE_GTCR)
! 129: PHY_WRITE(sc, MII_100T2CR, gtcr);
! 130: }
! 131:
! 132: int
! 133: mii_phy_auto(struct mii_softc *sc, int waitfor)
! 134: {
! 135: int bmsr, i;
! 136:
! 137: if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
! 138: /*
! 139: * Check for 1000BASE-X. Autonegotiation is a bit
! 140: * different on such devices.
! 141: */
! 142: if (sc->mii_flags & MIIF_IS_1000X) {
! 143: uint16_t anar = 0;
! 144:
! 145: if (sc->mii_extcapabilities & EXTSR_1000XFDX)
! 146: anar |= ANAR_X_FD;
! 147: if (sc->mii_extcapabilities & EXTSR_1000XHDX)
! 148: anar |= ANAR_X_HD;
! 149:
! 150: if (sc->mii_flags & MIIF_DOPAUSE &&
! 151: sc->mii_extcapabilities & EXTSR_1000XFDX)
! 152: anar |= ANAR_X_PAUSE_TOWARDS;
! 153:
! 154: PHY_WRITE(sc, MII_ANAR, anar);
! 155: } else {
! 156: uint16_t anar;
! 157:
! 158: anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) |
! 159: ANAR_CSMA;
! 160: /*
! 161: * Most 100baseTX PHY's only support symmetric
! 162: * PAUSE, so we don't advertise asymmetric
! 163: * PAUSE unless we also have 1000baseT capability.
! 164: */
! 165: if (sc->mii_flags & MIIF_DOPAUSE) {
! 166: if (sc->mii_capabilities & BMSR_100TXFDX)
! 167: anar |= ANAR_FC;
! 168: if (sc->mii_extcapabilities & EXTSR_1000TFDX)
! 169: anar |= ANAR_PAUSE_TOWARDS;
! 170: }
! 171: PHY_WRITE(sc, MII_ANAR, anar);
! 172: if (sc->mii_flags & MIIF_HAVE_GTCR) {
! 173: uint16_t gtcr = 0;
! 174:
! 175: if (sc->mii_extcapabilities & EXTSR_1000TFDX)
! 176: gtcr |= GTCR_ADV_1000TFDX;
! 177: if (sc->mii_extcapabilities & EXTSR_1000THDX)
! 178: gtcr |= GTCR_ADV_1000THDX;
! 179:
! 180: PHY_WRITE(sc, MII_100T2CR, gtcr);
! 181: }
! 182: }
! 183: PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
! 184: }
! 185:
! 186: if (waitfor) {
! 187: /* Wait 500ms for it to complete. */
! 188: for (i = 0; i < 500; i++) {
! 189: if ((bmsr = PHY_READ(sc, MII_BMSR)) & BMSR_ACOMP)
! 190: return (0);
! 191: delay(1000);
! 192: }
! 193:
! 194: /*
! 195: * Don't need to worry about clearing MIIF_DOINGAUTO.
! 196: * If that's set, a timeout is pending, and it will
! 197: * clear the flag.
! 198: */
! 199: return (EIO);
! 200: }
! 201:
! 202: /*
! 203: * Just let it finish asynchronously. This is for the benefit of
! 204: * the tick handler driving autonegotiation. Don't want 500ms
! 205: * delays all the time while the system is running!
! 206: */
! 207: if (sc->mii_flags & MIIF_AUTOTSLEEP) {
! 208: sc->mii_flags |= MIIF_DOINGAUTO;
! 209: tsleep(&sc->mii_flags, PZERO, "miiaut", hz >> 1);
! 210: mii_phy_auto_timeout(sc);
! 211: } else if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
! 212: sc->mii_flags |= MIIF_DOINGAUTO;
! 213: timeout_set(&sc->mii_phy_timo, mii_phy_auto_timeout, sc);
! 214: timeout_add(&sc->mii_phy_timo, hz / 2);
! 215: }
! 216: return (EJUSTRETURN);
! 217: }
! 218:
! 219: void
! 220: mii_phy_auto_timeout(void *arg)
! 221: {
! 222: struct mii_softc *sc = arg;
! 223: int s, bmsr;
! 224:
! 225: if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
! 226: return;
! 227:
! 228: s = splnet();
! 229: sc->mii_flags &= ~MIIF_DOINGAUTO;
! 230: bmsr = PHY_READ(sc, MII_BMSR);
! 231:
! 232: /* Update the media status. */
! 233: (void) PHY_SERVICE(sc, sc->mii_pdata, MII_POLLSTAT);
! 234: splx(s);
! 235: }
! 236:
! 237: int
! 238: mii_phy_tick(struct mii_softc *sc)
! 239: {
! 240: struct mii_data *mii = sc->mii_pdata;
! 241: struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
! 242: int reg;
! 243:
! 244: /* Just bail now if the interface is down. */
! 245: if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
! 246: return (EJUSTRETURN);
! 247:
! 248: /*
! 249: * If we're not doing autonegotiation, we don't need to do
! 250: * any extra work here. However, we need to check the link
! 251: * status so we can generate an announcement if the status
! 252: * changes.
! 253: */
! 254: if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
! 255: return (0);
! 256:
! 257: /* Read the status register twice; BMSR_LINK is latch-low. */
! 258: reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR);
! 259: if (reg & BMSR_LINK) {
! 260: /*
! 261: * See above.
! 262: */
! 263: return (0);
! 264: }
! 265:
! 266: /*
! 267: * Only retry autonegotiation every mii_anegticks seconds.
! 268: */
! 269: if (!sc->mii_anegticks)
! 270: sc->mii_anegticks = MII_ANEGTICKS;
! 271:
! 272: if (++sc->mii_ticks <= sc->mii_anegticks)
! 273: return (EJUSTRETURN);
! 274:
! 275: sc->mii_ticks = 0;
! 276: PHY_RESET(sc);
! 277:
! 278: if (mii_phy_auto(sc, 0) == EJUSTRETURN)
! 279: return (EJUSTRETURN);
! 280:
! 281: /*
! 282: * Might need to generate a status message if autonegotiation
! 283: * failed.
! 284: */
! 285: return (0);
! 286: }
! 287:
! 288: void
! 289: mii_phy_reset(struct mii_softc *sc)
! 290: {
! 291: int reg, i;
! 292:
! 293: if (sc->mii_flags & MIIF_NOISOLATE)
! 294: reg = BMCR_RESET;
! 295: else
! 296: reg = BMCR_RESET | BMCR_ISO;
! 297: PHY_WRITE(sc, MII_BMCR, reg);
! 298:
! 299: /*
! 300: * It is best to allow a little time for the reset to settle
! 301: * in before we start polling the BMCR again. Notably, the
! 302: * DP83840A manual states that there should be a 500us delay
! 303: * between asserting software reset and attempting MII serial
! 304: * operations. Also, a DP83815 can get into a bad state on
! 305: * cable removal and reinsertion if we do not delay here.
! 306: */
! 307: delay(500);
! 308:
! 309: /* Wait another 100ms for it to complete. */
! 310: for (i = 0; i < 100; i++) {
! 311: reg = PHY_READ(sc, MII_BMCR);
! 312: if ((reg & BMCR_RESET) == 0)
! 313: break;
! 314: delay(1000);
! 315: }
! 316:
! 317: if (sc->mii_inst != 0 && ((sc->mii_flags & MIIF_NOISOLATE) == 0))
! 318: PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
! 319: }
! 320:
! 321: void
! 322: mii_phy_down(struct mii_softc *sc)
! 323: {
! 324: if (sc->mii_flags & MIIF_DOINGAUTO) {
! 325: sc->mii_flags &= ~MIIF_DOINGAUTO;
! 326: timeout_del(&sc->mii_phy_timo);
! 327: }
! 328: }
! 329:
! 330:
! 331: void
! 332: mii_phy_status(struct mii_softc *sc)
! 333: {
! 334: PHY_STATUS(sc);
! 335: }
! 336:
! 337: void
! 338: mii_phy_update(struct mii_softc *sc, int cmd)
! 339: {
! 340: struct mii_data *mii = sc->mii_pdata;
! 341: struct ifnet *ifp = mii->mii_ifp;
! 342: int announce, s;
! 343:
! 344: if (sc->mii_media_active != mii->mii_media_active ||
! 345: sc->mii_media_status != mii->mii_media_status ||
! 346: cmd == MII_MEDIACHG) {
! 347: announce = mii_phy_statusmsg(sc);
! 348: (*mii->mii_statchg)(sc->mii_dev.dv_parent);
! 349: sc->mii_media_active = mii->mii_media_active;
! 350: sc->mii_media_status = mii->mii_media_status;
! 351:
! 352: if (announce) {
! 353: s = splnet();
! 354: if_link_state_change(ifp);
! 355: splx(s);
! 356: }
! 357: }
! 358: }
! 359:
! 360: int
! 361: mii_phy_statusmsg(struct mii_softc *sc)
! 362: {
! 363: struct mii_data *mii = sc->mii_pdata;
! 364: struct ifnet *ifp = mii->mii_ifp;
! 365: int baudrate, link_state, announce = 0;
! 366:
! 367: if (mii->mii_media_status & IFM_AVALID) {
! 368: if (mii->mii_media_status & IFM_ACTIVE) {
! 369: if (mii->mii_media_active & IFM_FDX)
! 370: link_state = LINK_STATE_FULL_DUPLEX;
! 371: else if (mii->mii_media_active & IFM_HDX)
! 372: link_state = LINK_STATE_HALF_DUPLEX;
! 373: else
! 374: link_state = LINK_STATE_UP;
! 375: } else
! 376: link_state = LINK_STATE_DOWN;
! 377: } else
! 378: link_state = LINK_STATE_UNKNOWN;
! 379:
! 380: baudrate = ifmedia_baudrate(mii->mii_media_active);
! 381:
! 382: if (link_state != ifp->if_link_state) {
! 383: ifp->if_link_state = link_state;
! 384: /*
! 385: * XXX Right here we'd like to notify protocols
! 386: * XXX that the link status has changed, so that
! 387: * XXX e.g. Duplicate Address Detection can restart.
! 388: */
! 389: announce = 1;
! 390: }
! 391:
! 392: if (baudrate != ifp->if_baudrate) {
! 393: ifp->if_baudrate = baudrate;
! 394: announce = 1;
! 395: }
! 396:
! 397: return (announce);
! 398: }
! 399:
! 400: /*
! 401: * Initialize generic PHY media based on BMSR, called when a PHY is
! 402: * attached. We expect to be set up to print a comma-separated list
! 403: * of media names. Does not print a newline.
! 404: */
! 405: void
! 406: mii_phy_add_media(struct mii_softc *sc)
! 407: {
! 408: struct mii_data *mii = sc->mii_pdata;
! 409:
! 410: #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
! 411:
! 412: if ((sc->mii_flags & MIIF_NOISOLATE) == 0)
! 413: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
! 414: MII_MEDIA_NONE);
! 415:
! 416: if (sc->mii_capabilities & BMSR_10THDX) {
! 417: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst),
! 418: MII_MEDIA_10_T);
! 419: }
! 420: if (sc->mii_capabilities & BMSR_10TFDX) {
! 421: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst),
! 422: MII_MEDIA_10_T_FDX);
! 423: }
! 424: if (sc->mii_capabilities & BMSR_100TXHDX) {
! 425: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst),
! 426: MII_MEDIA_100_TX);
! 427: }
! 428: if (sc->mii_capabilities & BMSR_100TXFDX) {
! 429: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst),
! 430: MII_MEDIA_100_TX_FDX);
! 431: }
! 432: if (sc->mii_capabilities & BMSR_100T4) {
! 433: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_T4, 0, sc->mii_inst),
! 434: MII_MEDIA_100_T4);
! 435: }
! 436: if (sc->mii_extcapabilities & EXTSR_MEDIAMASK) {
! 437: /*
! 438: * XXX Right now only handle 1000SX and 1000TX. Need
! 439: * XXX to handle 1000LX and 1000CX some how.
! 440: */
! 441: if (sc->mii_extcapabilities & EXTSR_1000XHDX) {
! 442: sc->mii_anegticks = MII_ANEGTICKS_GIGE;
! 443: sc->mii_flags |= MIIF_IS_1000X;
! 444: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0,
! 445: sc->mii_inst), MII_MEDIA_1000_X);
! 446: }
! 447: if (sc->mii_extcapabilities & EXTSR_1000XFDX) {
! 448: sc->mii_anegticks = MII_ANEGTICKS_GIGE;
! 449: sc->mii_flags |= MIIF_IS_1000X;
! 450: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX,
! 451: sc->mii_inst), MII_MEDIA_1000_X_FDX);
! 452: }
! 453:
! 454: /*
! 455: * 1000baseT media needs to be able to manipulate
! 456: * master/slave mode. We set IFM_ETH_MASTER in
! 457: * the "don't care mask" and filter it out when
! 458: * the media is set.
! 459: *
! 460: * All 1000baseT PHYs have a 1000baseT control register.
! 461: */
! 462: if (sc->mii_extcapabilities & EXTSR_1000THDX) {
! 463: sc->mii_anegticks = MII_ANEGTICKS_GIGE;
! 464: sc->mii_flags |= MIIF_HAVE_GTCR;
! 465: mii->mii_media.ifm_mask |= IFM_ETH_MASTER;
! 466: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, 0,
! 467: sc->mii_inst), MII_MEDIA_1000_T);
! 468: }
! 469: if (sc->mii_extcapabilities & EXTSR_1000TFDX) {
! 470: sc->mii_anegticks = MII_ANEGTICKS_GIGE;
! 471: sc->mii_flags |= MIIF_HAVE_GTCR;
! 472: mii->mii_media.ifm_mask |= IFM_ETH_MASTER;
! 473: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_T, IFM_FDX,
! 474: sc->mii_inst), MII_MEDIA_1000_T_FDX);
! 475: }
! 476: }
! 477:
! 478: if (sc->mii_capabilities & BMSR_ANEG) {
! 479: ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst),
! 480: MII_NMEDIA); /* intentionally invalid index */
! 481: }
! 482: #undef ADD
! 483: }
! 484:
! 485: void
! 486: mii_phy_delete_media(struct mii_softc *sc)
! 487: {
! 488: struct mii_data *mii = sc->mii_pdata;
! 489:
! 490: ifmedia_delete_instance(&mii->mii_media, sc->mii_inst);
! 491: }
! 492:
! 493: int
! 494: mii_phy_activate(struct device *self, enum devact act)
! 495: {
! 496: int rv = 0;
! 497:
! 498: switch (act) {
! 499: case DVACT_ACTIVATE:
! 500: rv = EOPNOTSUPP;
! 501: break;
! 502:
! 503: case DVACT_DEACTIVATE:
! 504: /* Nothing special to do. */
! 505: break;
! 506: }
! 507:
! 508: return (rv);
! 509: }
! 510:
! 511: int
! 512: mii_phy_detach(struct device *self, int flags)
! 513: {
! 514: struct mii_softc *sc = (void *) self;
! 515:
! 516: if (sc->mii_flags & MIIF_DOINGAUTO)
! 517: timeout_del(&sc->mii_phy_timo);
! 518:
! 519: mii_phy_delete_media(sc);
! 520:
! 521: return (0);
! 522: }
! 523:
! 524: const struct mii_phydesc *
! 525: mii_phy_match(const struct mii_attach_args *ma, const struct mii_phydesc *mpd)
! 526: {
! 527:
! 528: for (; mpd->mpd_name != NULL; mpd++) {
! 529: if (MII_OUI(ma->mii_id1, ma->mii_id2) == mpd->mpd_oui &&
! 530: MII_MODEL(ma->mii_id2) == mpd->mpd_model)
! 531: return (mpd);
! 532: }
! 533: return (NULL);
! 534: }
! 535:
! 536: /*
! 537: * Return the flow control status flag from MII_ANAR & MII_ANLPAR.
! 538: */
! 539: int
! 540: mii_phy_flowstatus(struct mii_softc *sc)
! 541: {
! 542: int anar, anlpar;
! 543:
! 544: if ((sc->mii_flags & MIIF_DOPAUSE) == 0)
! 545: return (0);
! 546:
! 547: anar = PHY_READ(sc, MII_ANAR);
! 548: anlpar = PHY_READ(sc, MII_ANLPAR);
! 549:
! 550: /* For 1000baseX, the bits are in a different location. */
! 551: if (sc->mii_flags & MIIF_IS_1000X) {
! 552: anar <<= 3;
! 553: anlpar <<= 3;
! 554: }
! 555:
! 556: if ((anar & ANAR_PAUSE_SYM) & (anlpar & ANLPAR_PAUSE_SYM))
! 557: return (IFM_FLOW|IFM_ETH_TXPAUSE|IFM_ETH_RXPAUSE);
! 558:
! 559: if ((anar & ANAR_PAUSE_SYM) == 0) {
! 560: if ((anar & ANAR_PAUSE_ASYM) &&
! 561: ((anlpar & ANLPAR_PAUSE_TOWARDS) == ANLPAR_PAUSE_TOWARDS))
! 562: return (IFM_FLOW|IFM_ETH_TXPAUSE);
! 563: else
! 564: return (0);
! 565: }
! 566:
! 567: if ((anar & ANAR_PAUSE_ASYM) == 0) {
! 568: if (anlpar & ANLPAR_PAUSE_SYM)
! 569: return (IFM_FLOW|IFM_ETH_TXPAUSE|IFM_ETH_RXPAUSE);
! 570: else
! 571: return (0);
! 572: }
! 573:
! 574: switch ((anlpar & ANLPAR_PAUSE_TOWARDS)) {
! 575: case ANLPAR_PAUSE_NONE:
! 576: return (0);
! 577:
! 578: case ANLPAR_PAUSE_ASYM:
! 579: return (IFM_FLOW|IFM_ETH_RXPAUSE);
! 580:
! 581: default:
! 582: return (IFM_FLOW|IFM_ETH_RXPAUSE|IFM_ETH_TXPAUSE);
! 583: }
! 584: /* NOTREACHED */
! 585: }
! 586:
! 587: /*
! 588: * Given an ifmedia word, return the corresponding ANAR value.
! 589: */
! 590: int
! 591: mii_anar(int media)
! 592: {
! 593: int rv;
! 594:
! 595: switch (media & (IFM_TMASK|IFM_NMASK|IFM_FDX)) {
! 596: case IFM_ETHER|IFM_10_T:
! 597: rv = ANAR_10|ANAR_CSMA;
! 598: break;
! 599: case IFM_ETHER|IFM_10_T|IFM_FDX:
! 600: rv = ANAR_10_FD|ANAR_CSMA;
! 601: break;
! 602: case IFM_ETHER|IFM_100_TX:
! 603: rv = ANAR_TX|ANAR_CSMA;
! 604: break;
! 605: case IFM_ETHER|IFM_100_TX|IFM_FDX:
! 606: rv = ANAR_TX_FD|ANAR_CSMA;
! 607: break;
! 608: case IFM_ETHER|IFM_100_T4:
! 609: rv = ANAR_T4|ANAR_CSMA;
! 610: break;
! 611: default:
! 612: rv = 0;
! 613: break;
! 614: }
! 615:
! 616: return (rv);
! 617: }
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