e1000phy.c revision 84145
175353Smjacob/* $FreeBSD: head/sys/dev/mii/e1000phy.c 84145 2001-09-29 19:18:52Z jlemon $ */ 275353Smjacob/* 375353Smjacob * Principal Author: Parag Patel 475353Smjacob * Copyright (c) 2001 575353Smjacob * All rights reserved. 675353Smjacob * 775353Smjacob * Redistribution and use in source and binary forms, with or without 875353Smjacob * modification, are permitted provided that the following conditions 975353Smjacob * are met: 1075353Smjacob * 1. Redistributions of source code must retain the above copyright 1175353Smjacob * notice unmodified, this list of conditions, and the following 1275353Smjacob * disclaimer. 1375353Smjacob * 2. Redistributions in binary form must reproduce the above copyright 1475353Smjacob * notice, this list of conditions and the following disclaimer in the 1575353Smjacob * documentation and/or other materials provided with the distribution. 1675353Smjacob * 1775353Smjacob * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1875353Smjacob * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1975353Smjacob * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2075353Smjacob * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2175353Smjacob * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2275353Smjacob * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2375353Smjacob * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2475353Smjacob * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2575353Smjacob * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2675353Smjacob * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2775353Smjacob * SUCH DAMAGE. 2875353Smjacob * 2975353Smjacob * Additonal Copyright (c) 2001 by Traakan Software under same licence. 3075353Smjacob * Secondary Author: Matthew Jacob 3175353Smjacob */ 3275353Smjacob 3375353Smjacob/* 3475353Smjacob * driver for the Marvell 88E1000 series external 1000/100/10-BT PHY. 3575353Smjacob */ 3675353Smjacob 3775353Smjacob#include <sys/param.h> 3875353Smjacob#include <sys/systm.h> 3975353Smjacob#include <sys/kernel.h> 4075353Smjacob#include <sys/malloc.h> 4175353Smjacob#include <sys/socket.h> 4275353Smjacob#include <sys/bus.h> 4375353Smjacob 4475353Smjacob#include <machine/clock.h> 4575353Smjacob 4675353Smjacob#include <net/if.h> 4775353Smjacob#include <net/if_media.h> 4875353Smjacob 4975353Smjacob#include <dev/mii/mii.h> 5075353Smjacob#include <dev/mii/miivar.h> 5175353Smjacob#include <dev/mii/miidevs.h> 5275353Smjacob 5375353Smjacob#include <dev/mii/e1000phyreg.h> 5475353Smjacob 5575353Smjacob#include "miibus_if.h" 5675353Smjacob 5775353Smjacobstatic int e1000phy_probe(device_t); 5875353Smjacobstatic int e1000phy_attach(device_t); 5975353Smjacobstatic int e1000phy_detach(device_t); 6075353Smjacob 6175353Smjacobstatic device_method_t e1000phy_methods[] = { 6275353Smjacob /* device interface */ 6375353Smjacob DEVMETHOD(device_probe, e1000phy_probe), 6475353Smjacob DEVMETHOD(device_attach, e1000phy_attach), 6575353Smjacob DEVMETHOD(device_detach, e1000phy_detach), 6675353Smjacob DEVMETHOD(device_shutdown, bus_generic_shutdown), 6775353Smjacob { 0, 0 } 6875353Smjacob}; 6975353Smjacob 7075353Smjacobstatic devclass_t e1000phy_devclass; 7175353Smjacobstatic driver_t e1000phy_driver = { 7275353Smjacob "e1000phy", e1000phy_methods, sizeof (struct mii_softc) 7375353Smjacob}; 7475353SmjacobDRIVER_MODULE(e1000phy, miibus, e1000phy_driver, e1000phy_devclass, 0, 0); 7575353Smjacob 7684145Sjlemonstatic int e1000phy_service(struct mii_softc *, struct mii_data *, int); 7784145Sjlemonstatic void e1000phy_status(struct mii_softc *); 7884145Sjlemonstatic void e1000phy_reset(struct mii_softc *); 7984145Sjlemonstatic int e1000phy_mii_phy_auto(struct mii_softc *, int); 8075353Smjacob 8175353Smjacobextern void mii_phy_auto_timeout(void *); 8275353Smjacob 8375353Smjacobstatic int e1000phy_debug = 0; 8475353Smjacob 8575353Smjacobstatic int 8675353Smjacobe1000phy_probe(device_t dev) 8775353Smjacob{ 8875353Smjacob struct mii_attach_args *ma; 8975353Smjacob u_int32_t id; 9075353Smjacob 9175353Smjacob ma = device_get_ivars(dev); 9275353Smjacob id = ((ma->mii_id1 << 16) | ma->mii_id2) & E1000_ID_MASK; 9375353Smjacob 9475353Smjacob if (id != E1000_ID_88E1000 && id != E1000_ID_88E1000S) { 9575353Smjacob return ENXIO; 9675353Smjacob } 9775353Smjacob 9875353Smjacob device_set_desc(dev, MII_STR_MARVELL_E1000); 9975353Smjacob return 0; 10075353Smjacob} 10175353Smjacob 10275353Smjacobstatic int 10375353Smjacobe1000phy_attach(device_t dev) 10475353Smjacob{ 10575353Smjacob struct mii_softc *sc; 10675353Smjacob struct mii_attach_args *ma; 10775353Smjacob struct mii_data *mii; 10875353Smjacob 10975353Smjacob getenv_int("e1000phy_debug", &e1000phy_debug); 11075353Smjacob 11175353Smjacob sc = device_get_softc(dev); 11275353Smjacob ma = device_get_ivars(dev); 11375353Smjacob sc->mii_dev = device_get_parent(dev); 11475353Smjacob mii = device_get_softc(sc->mii_dev); 11575353Smjacob LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 11675353Smjacob 11775353Smjacob sc->mii_inst = mii->mii_instance; 11875353Smjacob sc->mii_phy = ma->mii_phyno; 11975353Smjacob sc->mii_service = e1000phy_service; 12075353Smjacob sc->mii_pdata = mii; 12175353Smjacob 12275353Smjacob sc->mii_flags |= MIIF_NOISOLATE; 12375353Smjacob mii->mii_instance++; 12475353Smjacob e1000phy_reset(sc); 12575353Smjacob 12684144Sjlemon device_printf(dev, " "); 12784144Sjlemon 12875353Smjacob#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 12984144Sjlemon/* 13075353Smjacob ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 13175353Smjacob E1000_CR_ISOLATE); 13284144Sjlemon*/ 13384144Sjlemon ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, 0, sc->mii_inst), 13484144Sjlemon E1000_CR_SPEED_10); 13584144Sjlemon printf("10baseT, "); 13684144Sjlemon ADD(IFM_MAKEWORD(IFM_ETHER, IFM_10_T, IFM_FDX, sc->mii_inst), 13784144Sjlemon E1000_CR_SPEED_10 | E1000_CR_FULL_DUPLEX); 13884144Sjlemon printf("10baseT-FDX, "); 13984144Sjlemon ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, 0, sc->mii_inst), 14084144Sjlemon E1000_CR_SPEED_100); 14184144Sjlemon printf("100baseTX, "); 14284144Sjlemon ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_FDX, sc->mii_inst), 14384144Sjlemon E1000_CR_SPEED_100 | E1000_CR_FULL_DUPLEX); 14484144Sjlemon printf("100baseTX-FDX, "); 14575353Smjacob /* 14684144Sjlemon * 1000BT-simplex not supported; driver must ignore this entry, 14784144Sjlemon * but it must be present in order to manually set full-duplex. 14884144Sjlemon */ 14975353Smjacob ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, 0, sc->mii_inst), 15084144Sjlemon E1000_CR_SPEED_1000); 15184144Sjlemon ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, IFM_FDX, sc->mii_inst), 15284144Sjlemon E1000_CR_SPEED_1000 | E1000_CR_FULL_DUPLEX); 15384144Sjlemon printf("1000baseTX-FDX, "); 15475353Smjacob ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0); 15584144Sjlemon printf("auto\n"); 15675353Smjacob#undef ADD 15775353Smjacob 15875353Smjacob MIIBUS_MEDIAINIT(sc->mii_dev); 15975353Smjacob return(0); 16075353Smjacob} 16175353Smjacob 16275353Smjacobstatic int 16375353Smjacobe1000phy_detach(device_t dev) 16475353Smjacob{ 16575353Smjacob struct mii_softc *sc; 16675353Smjacob struct mii_data *mii; 16775353Smjacob 16875353Smjacob sc = device_get_softc(dev); 16975353Smjacob mii = device_get_softc(device_get_parent(dev)); 17075353Smjacob 17175353Smjacob if (sc->mii_flags & MIIF_DOINGAUTO) 17275353Smjacob untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch); 17375353Smjacob 17475353Smjacob sc->mii_dev = NULL; 17575353Smjacob LIST_REMOVE(sc, mii_list); 17675353Smjacob 17775353Smjacob return 0; 17875353Smjacob} 17975353Smjacob 18075353Smjacobstatic void 18175353Smjacobe1000phy_reset(struct mii_softc *sc) 18275353Smjacob{ 18375353Smjacob u_int32_t reg; 18475353Smjacob int i; 18575353Smjacob 18675353Smjacob /* initialize custom E1000 registers to magic values */ 18775353Smjacob reg = PHY_READ(sc, E1000_SCR); 18875353Smjacob reg &= ~E1000_SCR_AUTO_X_MODE; 18975353Smjacob PHY_WRITE(sc, E1000_SCR, reg); 19075353Smjacob 19175353Smjacob /* normal PHY reset */ 19275353Smjacob /*mii_phy_reset(sc);*/ 19375353Smjacob reg = PHY_READ(sc, E1000_CR); 19475353Smjacob reg |= E1000_CR_RESET; 19575353Smjacob PHY_WRITE(sc, E1000_CR, reg); 19675353Smjacob 19775353Smjacob for (i = 0; i < 500; i++) { 19875353Smjacob DELAY(1); 19975353Smjacob reg = PHY_READ(sc, E1000_CR); 20075353Smjacob if (!(reg & E1000_CR_RESET)) 20175353Smjacob break; 20275353Smjacob } 20375353Smjacob 20475353Smjacob /* set more custom E1000 registers to magic values */ 20575353Smjacob reg = PHY_READ(sc, E1000_SCR); 20675353Smjacob reg |= E1000_SCR_ASSERT_CRS_ON_TX; 20775353Smjacob PHY_WRITE(sc, E1000_SCR, reg); 20875353Smjacob 20975353Smjacob reg = PHY_READ(sc, E1000_ESCR); 21075353Smjacob reg |= E1000_ESCR_TX_CLK_25; 21175353Smjacob PHY_WRITE(sc, E1000_ESCR, reg); 21275353Smjacob 21375353Smjacob /* even more magic to reset DSP? */ 21475353Smjacob PHY_WRITE(sc, 29, 0x1d); 21575353Smjacob PHY_WRITE(sc, 30, 0xc1); 21675353Smjacob PHY_WRITE(sc, 30, 0x00); 21775353Smjacob} 21875353Smjacob 21984145Sjlemonstatic int 22075353Smjacobe1000phy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 22175353Smjacob{ 22275353Smjacob struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 22375353Smjacob int reg; 22475353Smjacob 22575353Smjacob switch (cmd) { 22675353Smjacob case MII_POLLSTAT: 22775353Smjacob /* 22875353Smjacob * If we're not polling our PHY instance, just return. 22975353Smjacob */ 23075353Smjacob if (IFM_INST(ife->ifm_media) != sc->mii_inst) 23175353Smjacob return (0); 23275353Smjacob break; 23375353Smjacob 23475353Smjacob case MII_MEDIACHG: 23575353Smjacob /* 23675353Smjacob * If the media indicates a different PHY instance, 23775353Smjacob * isolate ourselves. 23875353Smjacob */ 23975353Smjacob if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 24075353Smjacob reg = PHY_READ(sc, E1000_CR); 24175353Smjacob PHY_WRITE(sc, E1000_CR, reg | E1000_CR_ISOLATE); 24275353Smjacob return (0); 24375353Smjacob } 24475353Smjacob 24575353Smjacob /* 24675353Smjacob * If the interface is not up, don't do anything. 24775353Smjacob */ 24875353Smjacob if ((mii->mii_ifp->if_flags & IFF_UP) == 0) { 24975353Smjacob break; 25075353Smjacob } 25175353Smjacob 25275353Smjacob switch (IFM_SUBTYPE(ife->ifm_media)) { 25375353Smjacob case IFM_AUTO: 25475353Smjacob /* 25575353Smjacob * If we're already in auto mode, just return. 25675353Smjacob */ 25775353Smjacob if (sc->mii_flags & MIIF_DOINGAUTO) { 25875353Smjacob return (0); 25975353Smjacob } 26075353Smjacob e1000phy_reset(sc); 26175353Smjacob (void)e1000phy_mii_phy_auto(sc, 1); 26275353Smjacob break; 26375353Smjacob 26475353Smjacob case IFM_1000_TX: 26575353Smjacob if (sc->mii_flags & MIIF_DOINGAUTO) 26675353Smjacob return (0); 26775353Smjacob 26875353Smjacob e1000phy_reset(sc); 26975353Smjacob 27075353Smjacob /* TODO - any other way to force 1000BT? */ 27175353Smjacob (void)e1000phy_mii_phy_auto(sc, 1); 27275353Smjacob break; 27375353Smjacob 27475353Smjacob case IFM_100_TX: 27575353Smjacob e1000phy_reset(sc); 27675353Smjacob 27775353Smjacob if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) { 27875353Smjacob PHY_WRITE(sc, E1000_CR, 27975353Smjacob E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_100); 28075353Smjacob PHY_WRITE(sc, E1000_AR, E1000_AR_100TX_FD); 28175353Smjacob } else { 28275353Smjacob PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_100); 28375353Smjacob PHY_WRITE(sc, E1000_AR, E1000_AR_100TX); 28475353Smjacob } 28575353Smjacob break; 28675353Smjacob 28775353Smjacob case IFM_10_T: 28875353Smjacob e1000phy_reset(sc); 28975353Smjacob 29075353Smjacob if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) { 29175353Smjacob PHY_WRITE(sc, E1000_CR, 29275353Smjacob E1000_CR_FULL_DUPLEX | E1000_CR_SPEED_10); 29375353Smjacob PHY_WRITE(sc, E1000_AR, E1000_AR_10T_FD); 29475353Smjacob } else { 29575353Smjacob PHY_WRITE(sc, E1000_CR, E1000_CR_SPEED_10); 29675353Smjacob PHY_WRITE(sc, E1000_AR, E1000_AR_10T); 29775353Smjacob } 29875353Smjacob 29975353Smjacob break; 30075353Smjacob 30175353Smjacob default: 30275353Smjacob return (EINVAL); 30375353Smjacob } 30475353Smjacob 30575353Smjacob break; 30675353Smjacob 30775353Smjacob case MII_TICK: 30875353Smjacob /* 30975353Smjacob * If we're not currently selected, just return. 31075353Smjacob */ 31175353Smjacob if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 31275353Smjacob return (0); 31375353Smjacob } 31475353Smjacob 31575353Smjacob /* 31684145Sjlemon * Is the interface even up? 31775353Smjacob */ 31884145Sjlemon if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 31975353Smjacob return (0); 32075353Smjacob 32175353Smjacob /* 32284145Sjlemon * Only used for autonegotiation. 32375353Smjacob */ 32484145Sjlemon if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 32584145Sjlemon break; 32675353Smjacob 32775353Smjacob /* 32884145Sjlemon * check for link. 32984145Sjlemon * Read the status register twice; BMSR_LINK is latch-low. 33075353Smjacob */ 33184145Sjlemon reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 33284145Sjlemon if (reg & BMSR_LINK) 33384145Sjlemon break; 33475353Smjacob 33575353Smjacob /* 33684145Sjlemon * Only retry autonegotiation every 5 seconds. 33775353Smjacob */ 33884145Sjlemon if (++sc->mii_ticks != 5) 33984145Sjlemon return (0); 34075353Smjacob 34184145Sjlemon sc->mii_ticks = 0; 34275353Smjacob e1000phy_reset(sc); 34384145Sjlemon if (e1000phy_mii_phy_auto(sc, 0) == EJUSTRETURN) 34484145Sjlemon return (0); 34575353Smjacob break; 34675353Smjacob } 34775353Smjacob 34875353Smjacob /* Update the media status. */ 34975353Smjacob e1000phy_status(sc); 35075353Smjacob 35175353Smjacob /* Callback if something changed. */ 35284145Sjlemon mii_phy_update(sc, cmd); 35375353Smjacob return (0); 35475353Smjacob} 35575353Smjacob 35684145Sjlemonstatic void 35775353Smjacobe1000phy_status(struct mii_softc *sc) 35875353Smjacob{ 35975353Smjacob struct mii_data *mii = sc->mii_pdata; 36075353Smjacob int bmsr, bmcr, esr, ssr, isr, ar, lpar; 36175353Smjacob 36275353Smjacob mii->mii_media_status = IFM_AVALID; 36375353Smjacob mii->mii_media_active = IFM_ETHER; 36475353Smjacob 36575353Smjacob bmsr = PHY_READ(sc, E1000_SR) | PHY_READ(sc, E1000_SR); 36675353Smjacob esr = PHY_READ(sc, E1000_ESR); 36775353Smjacob bmcr = PHY_READ(sc, E1000_CR); 36875353Smjacob ssr = PHY_READ(sc, E1000_SSR); 36975353Smjacob isr = PHY_READ(sc, E1000_ISR); 37075353Smjacob ar = PHY_READ(sc, E1000_AR); 37175353Smjacob lpar = PHY_READ(sc, E1000_LPAR); 37275353Smjacob 37375353Smjacob if (bmsr & E1000_SR_LINK_STATUS) 37475353Smjacob mii->mii_media_status |= IFM_ACTIVE; 37575353Smjacob 37675353Smjacob if (bmcr & E1000_CR_LOOPBACK) 37775353Smjacob mii->mii_media_active |= IFM_LOOP; 37875353Smjacob 37975353Smjacob if ((sc->mii_flags & MIIF_DOINGAUTO) && 38075353Smjacob (!(bmsr & E1000_SR_AUTO_NEG_COMPLETE) || !(ssr & E1000_SSR_LINK) || 38175353Smjacob !(ssr & E1000_SSR_SPD_DPLX_RESOLVED))) { 38275353Smjacob /* Erg, still trying, I guess... */ 38375353Smjacob mii->mii_media_active |= IFM_NONE; 38475353Smjacob return; 38575353Smjacob } 38675353Smjacob 38775353Smjacob if (ssr & E1000_SSR_1000MBS) 38875353Smjacob mii->mii_media_active |= IFM_1000_TX; 38975353Smjacob else if (ssr & E1000_SSR_100MBS) 39075353Smjacob mii->mii_media_active |= IFM_100_TX; 39175353Smjacob else 39275353Smjacob mii->mii_media_active |= IFM_10_T; 39375353Smjacob 39475353Smjacob if (ssr & E1000_SSR_DUPLEX) 39575353Smjacob mii->mii_media_active |= IFM_FDX; 39675353Smjacob else 39775353Smjacob mii->mii_media_active |= IFM_HDX; 39875353Smjacob 39975353Smjacob /* FLAG0==rx-flow-control FLAG1==tx-flow-control */ 40075353Smjacob if ((ar & E1000_AR_PAUSE) && (lpar & E1000_LPAR_PAUSE)) { 40175353Smjacob mii->mii_media_active |= IFM_FLAG0 | IFM_FLAG1; 40275353Smjacob } else if (!(ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) && 40375353Smjacob (lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) { 40475353Smjacob mii->mii_media_active |= IFM_FLAG1; 40575353Smjacob } else if ((ar & E1000_AR_PAUSE) && (ar & E1000_AR_ASM_DIR) && 40675353Smjacob !(lpar & E1000_LPAR_PAUSE) && (lpar & E1000_LPAR_ASM_DIR)) { 40775353Smjacob mii->mii_media_active |= IFM_FLAG0; 40875353Smjacob } 40975353Smjacob} 41075353Smjacob 41175353Smjacobstatic int 41275353Smjacobe1000phy_mii_phy_auto(struct mii_softc *mii, int waitfor) 41375353Smjacob{ 41475353Smjacob int bmsr, i; 41575353Smjacob 41675353Smjacob if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 41775353Smjacob PHY_WRITE(mii, E1000_AR, E1000_AR_10T | E1000_AR_10T_FD | 41875353Smjacob E1000_AR_100TX | E1000_AR_100TX_FD | 41975353Smjacob E1000_AR_PAUSE | E1000_AR_ASM_DIR); 42075353Smjacob PHY_WRITE(mii, E1000_1GCR, E1000_1GCR_1000T_FD); 42175353Smjacob PHY_WRITE(mii, E1000_CR, 42275353Smjacob E1000_CR_AUTO_NEG_ENABLE | E1000_CR_RESTART_AUTO_NEG); 42375353Smjacob } 42475353Smjacob 42575353Smjacob if (waitfor) { 42675353Smjacob /* Wait 500ms for it to complete. */ 42775353Smjacob for (i = 0; i < 500; i++) { 42875353Smjacob bmsr = 42975353Smjacob PHY_READ(mii, E1000_SR) | PHY_READ(mii, E1000_SR); 43075353Smjacob 43175353Smjacob if (bmsr & E1000_SR_AUTO_NEG_COMPLETE) { 43275353Smjacob return (0); 43375353Smjacob } 43475353Smjacob DELAY(1000); 43575353Smjacob } 43675353Smjacob 43775353Smjacob /* 43875353Smjacob * Don't need to worry about clearing MIIF_DOINGAUTO. 43975353Smjacob * If that's set, a timeout is pending, and it will 44075353Smjacob * clear the flag. [do it anyway] 44175353Smjacob */ 44275353Smjacob } 44375353Smjacob 44475353Smjacob /* 44575353Smjacob * Just let it finish asynchronously. This is for the benefit of 44675353Smjacob * the tick handler driving autonegotiation. Don't want 500ms 44775353Smjacob * delays all the time while the system is running! 44875353Smjacob */ 44975353Smjacob if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 45075353Smjacob mii->mii_flags |= MIIF_DOINGAUTO; 45175353Smjacob mii->mii_ticks = 0; 45275353Smjacob mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1); 45375353Smjacob } 45475353Smjacob return (EJUSTRETURN); 45575353Smjacob} 456