brgphy.c revision 84145
159477Swpaul/* 259477Swpaul * Copyright (c) 2000 359477Swpaul * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved. 459477Swpaul * 559477Swpaul * Redistribution and use in source and binary forms, with or without 659477Swpaul * modification, are permitted provided that the following conditions 759477Swpaul * are met: 859477Swpaul * 1. Redistributions of source code must retain the above copyright 959477Swpaul * notice, this list of conditions and the following disclaimer. 1059477Swpaul * 2. Redistributions in binary form must reproduce the above copyright 1159477Swpaul * notice, this list of conditions and the following disclaimer in the 1259477Swpaul * documentation and/or other materials provided with the distribution. 1359477Swpaul * 3. All advertising materials mentioning features or use of this software 1459477Swpaul * must display the following acknowledgement: 1559477Swpaul * This product includes software developed by Bill Paul. 1659477Swpaul * 4. Neither the name of the author nor the names of any co-contributors 1759477Swpaul * may be used to endorse or promote products derived from this software 1859477Swpaul * without specific prior written permission. 1959477Swpaul * 2059477Swpaul * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 2159477Swpaul * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2259477Swpaul * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2359477Swpaul * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 2459477Swpaul * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2559477Swpaul * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 2659477Swpaul * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 2759477Swpaul * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 2859477Swpaul * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 2959477Swpaul * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 3059477Swpaul * THE POSSIBILITY OF SUCH DAMAGE. 3159477Swpaul * 3259477Swpaul * $FreeBSD: head/sys/dev/mii/brgphy.c 84145 2001-09-29 19:18:52Z jlemon $ 3359477Swpaul */ 3459477Swpaul 3559477Swpaul/* 3659477Swpaul * Driver for the Broadcom BCR5400 1000baseTX PHY. Speed is always 3759477Swpaul * 1000mbps; all we need to negotiate here is full or half duplex. 3859477Swpaul */ 3959477Swpaul 4059477Swpaul#include <sys/param.h> 4159477Swpaul#include <sys/systm.h> 4259477Swpaul#include <sys/kernel.h> 4359477Swpaul#include <sys/malloc.h> 4459477Swpaul#include <sys/socket.h> 4559477Swpaul#include <sys/bus.h> 4659477Swpaul 4783029Swpaul#include <machine/clock.h> 4859477Swpaul 4959477Swpaul#include <net/if.h> 5059477Swpaul#include <net/if_media.h> 5159477Swpaul 5259477Swpaul#include <dev/mii/mii.h> 5359477Swpaul#include <dev/mii/miivar.h> 5459477Swpaul#include <dev/mii/miidevs.h> 5559477Swpaul 5659477Swpaul#include <dev/mii/brgphyreg.h> 5759477Swpaul 5859477Swpaul#include "miibus_if.h" 5959477Swpaul 6059477Swpaul#if !defined(lint) 6159477Swpaulstatic const char rcsid[] = 6259477Swpaul "$FreeBSD: head/sys/dev/mii/brgphy.c 84145 2001-09-29 19:18:52Z jlemon $"; 6359477Swpaul#endif 6459477Swpaul 6559477Swpaulstatic int brgphy_probe __P((device_t)); 6659477Swpaulstatic int brgphy_attach __P((device_t)); 6759477Swpaulstatic int brgphy_detach __P((device_t)); 6859477Swpaul 6959477Swpaulstatic device_method_t brgphy_methods[] = { 7059477Swpaul /* device interface */ 7159477Swpaul DEVMETHOD(device_probe, brgphy_probe), 7259477Swpaul DEVMETHOD(device_attach, brgphy_attach), 7359477Swpaul DEVMETHOD(device_detach, brgphy_detach), 7459477Swpaul DEVMETHOD(device_shutdown, bus_generic_shutdown), 7559477Swpaul { 0, 0 } 7659477Swpaul}; 7759477Swpaul 7859477Swpaulstatic devclass_t brgphy_devclass; 7959477Swpaul 8059477Swpaulstatic driver_t brgphy_driver = { 8159477Swpaul "brgphy", 8259477Swpaul brgphy_methods, 8359477Swpaul sizeof(struct mii_softc) 8459477Swpaul}; 8559477Swpaul 8659477SwpaulDRIVER_MODULE(brgphy, miibus, brgphy_driver, brgphy_devclass, 0, 0); 8759477Swpaul 8884145Sjlemonstatic int brgphy_service(struct mii_softc *, struct mii_data *, int); 8984145Sjlemonstatic void brgphy_status(struct mii_softc *); 9059477Swpaulstatic int brgphy_mii_phy_auto __P((struct mii_softc *, int)); 9159477Swpaulextern void mii_phy_auto_timeout __P((void *)); 9259477Swpaul 9359477Swpaulstatic int brgphy_probe(dev) 9459477Swpaul device_t dev; 9559477Swpaul{ 9659477Swpaul struct mii_attach_args *ma; 9759477Swpaul 9859477Swpaul ma = device_get_ivars(dev); 9959477Swpaul 10083029Swpaul if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxBROADCOM && 10183029Swpaul MII_MODEL(ma->mii_id2) == MII_MODEL_xxBROADCOM_BCM5400) { 10283029Swpaul device_set_desc(dev, MII_STR_xxBROADCOM_BCM5400); 10383029Swpaul return(0); 10483029Swpaul } 10559477Swpaul 10683029Swpaul if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxBROADCOM && 10783029Swpaul MII_MODEL(ma->mii_id2) == MII_MODEL_xxBROADCOM_BCM5401) { 10883029Swpaul device_set_desc(dev, MII_STR_xxBROADCOM_BCM5401); 10983029Swpaul return(0); 11083029Swpaul } 11159477Swpaul 11283029Swpaul if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxBROADCOM && 11383029Swpaul MII_MODEL(ma->mii_id2) == MII_MODEL_xxBROADCOM_BCM5411) { 11483029Swpaul device_set_desc(dev, MII_STR_xxBROADCOM_BCM5411); 11583029Swpaul return(0); 11683029Swpaul } 11783029Swpaul 11883029Swpaul return(ENXIO); 11959477Swpaul} 12059477Swpaul 12159477Swpaulstatic int brgphy_attach(dev) 12259477Swpaul device_t dev; 12359477Swpaul{ 12459477Swpaul struct mii_softc *sc; 12559477Swpaul struct mii_attach_args *ma; 12659477Swpaul struct mii_data *mii; 12759477Swpaul const char *sep = ""; 12859477Swpaul 12959477Swpaul sc = device_get_softc(dev); 13059477Swpaul ma = device_get_ivars(dev); 13159477Swpaul sc->mii_dev = device_get_parent(dev); 13259477Swpaul mii = device_get_softc(sc->mii_dev); 13359477Swpaul LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 13459477Swpaul 13559477Swpaul sc->mii_inst = mii->mii_instance; 13659477Swpaul sc->mii_phy = ma->mii_phyno; 13759477Swpaul sc->mii_service = brgphy_service; 13859477Swpaul sc->mii_pdata = mii; 13959477Swpaul 14059477Swpaul sc->mii_flags |= MIIF_NOISOLATE; 14159477Swpaul mii->mii_instance++; 14259477Swpaul 14359477Swpaul#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 14459477Swpaul#define PRINT(s) printf("%s%s", sep, s); sep = ", " 14559477Swpaul 14659477Swpaul ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 14759477Swpaul BMCR_ISO); 14859477Swpaul#if 0 14959477Swpaul ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 15059477Swpaul BMCR_LOOP|BMCR_S100); 15159477Swpaul#endif 15259477Swpaul 15359477Swpaul mii_phy_reset(sc); 15459477Swpaul 15583029Swpaul 15683029Swpaul sc->mii_capabilities = 15783029Swpaul PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 15859477Swpaul device_printf(dev, " "); 15983029Swpaul if (sc->mii_capabilities & BMSR_MEDIAMASK) 16083029Swpaul mii_add_media(mii, (sc->mii_capabilities & ~BMSR_ANEG), 16183029Swpaul sc->mii_inst); 16259477Swpaul ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, 0, sc->mii_inst), 16359477Swpaul BRGPHY_BMCR_FDX); 16483029Swpaul PRINT(", 1000baseTX"); 16559477Swpaul ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_TX, IFM_FDX, sc->mii_inst), 0); 16659477Swpaul PRINT("1000baseTX-FDX"); 16759477Swpaul ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0); 16859477Swpaul PRINT("auto"); 16959477Swpaul 17059477Swpaul printf("\n"); 17159477Swpaul#undef ADD 17259477Swpaul#undef PRINT 17359477Swpaul 17459477Swpaul MIIBUS_MEDIAINIT(sc->mii_dev); 17559477Swpaul return(0); 17659477Swpaul} 17759477Swpaul 17859477Swpaulstatic int brgphy_detach(dev) 17959477Swpaul device_t dev; 18059477Swpaul{ 18159477Swpaul struct mii_softc *sc; 18259477Swpaul struct mii_data *mii; 18359477Swpaul 18459477Swpaul sc = device_get_softc(dev); 18559477Swpaul mii = device_get_softc(device_get_parent(dev)); 18669925Swpaul if (sc->mii_flags & MIIF_DOINGAUTO) 18769925Swpaul untimeout(mii_phy_auto_timeout, sc, sc->mii_auto_ch); 18883029Swpaul 18959477Swpaul sc->mii_dev = NULL; 19059477Swpaul LIST_REMOVE(sc, mii_list); 19159477Swpaul 19259477Swpaul return(0); 19359477Swpaul} 19484145Sjlemon 19584145Sjlemonstatic int 19659477Swpaulbrgphy_service(sc, mii, cmd) 19759477Swpaul struct mii_softc *sc; 19859477Swpaul struct mii_data *mii; 19959477Swpaul int cmd; 20059477Swpaul{ 20159477Swpaul struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 20283029Swpaul int reg, speed; 20359477Swpaul 20459477Swpaul switch (cmd) { 20559477Swpaul case MII_POLLSTAT: 20659477Swpaul /* 20759477Swpaul * If we're not polling our PHY instance, just return. 20859477Swpaul */ 20959477Swpaul if (IFM_INST(ife->ifm_media) != sc->mii_inst) 21059477Swpaul return (0); 21159477Swpaul break; 21259477Swpaul 21359477Swpaul case MII_MEDIACHG: 21459477Swpaul /* 21559477Swpaul * If the media indicates a different PHY instance, 21659477Swpaul * isolate ourselves. 21759477Swpaul */ 21859477Swpaul if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 21959477Swpaul reg = PHY_READ(sc, MII_BMCR); 22059477Swpaul PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 22159477Swpaul return (0); 22259477Swpaul } 22359477Swpaul 22459477Swpaul /* 22559477Swpaul * If the interface is not up, don't do anything. 22659477Swpaul */ 22759477Swpaul if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 22859477Swpaul break; 22959477Swpaul 23059477Swpaul PHY_WRITE(sc, BRGPHY_MII_PHY_EXTCTL, 23159477Swpaul BRGPHY_PHY_EXTCTL_HIGH_LA|BRGPHY_PHY_EXTCTL_EN_LTR); 23259477Swpaul PHY_WRITE(sc, BRGPHY_MII_AUXCTL, 23359477Swpaul BRGPHY_AUXCTL_LONG_PKT|BRGPHY_AUXCTL_TX_TST); 23459477Swpaul PHY_WRITE(sc, BRGPHY_MII_IMR, 0xFF00); 23559477Swpaul 23659477Swpaul switch (IFM_SUBTYPE(ife->ifm_media)) { 23759477Swpaul case IFM_AUTO: 23859477Swpaul#ifdef foo 23959477Swpaul /* 24059477Swpaul * If we're already in auto mode, just return. 24159477Swpaul */ 24259477Swpaul if (PHY_READ(sc, BRGPHY_MII_BMCR) & BRGPHY_BMCR_AUTOEN) 24359477Swpaul return (0); 24459477Swpaul#endif 24559477Swpaul (void) brgphy_mii_phy_auto(sc, 1); 24659477Swpaul break; 24759477Swpaul case IFM_1000_TX: 24883029Swpaul speed = BRGPHY_S1000; 24983029Swpaul goto setit; 25083029Swpaul case IFM_100_TX: 25183029Swpaul speed = BRGPHY_S100; 25283029Swpaul goto setit; 25383029Swpaul case IFM_10_T: 25483029Swpaul speed = BRGPHY_S10; 25583029Swpaulsetit: 25659477Swpaul if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) { 25759477Swpaul PHY_WRITE(sc, BRGPHY_MII_BMCR, 25883029Swpaul BRGPHY_BMCR_FDX|speed); 25959477Swpaul } else { 26083029Swpaul PHY_WRITE(sc, BRGPHY_MII_BMCR, speed); 26159477Swpaul } 26259477Swpaul PHY_WRITE(sc, BRGPHY_MII_ANAR, BRGPHY_SEL_TYPE); 26359477Swpaul 26483029Swpaul if (IFM_SUBTYPE(ife->ifm_media) != IFM_1000_TX) 26583029Swpaul break; 26683029Swpaul 26759477Swpaul /* 26859477Swpaul * When settning the link manually, one side must 26959477Swpaul * be the master and the other the slave. However 27059477Swpaul * ifmedia doesn't give us a good way to specify 27159477Swpaul * this, so we fake it by using one of the LINK 27259477Swpaul * flags. If LINK0 is set, we program the PHY to 27359477Swpaul * be a master, otherwise it's a slave. 27459477Swpaul */ 27559477Swpaul if ((mii->mii_ifp->if_flags & IFF_LINK0)) { 27659477Swpaul PHY_WRITE(sc, BRGPHY_MII_1000CTL, 27759477Swpaul BRGPHY_1000CTL_MSE|BRGPHY_1000CTL_MSC); 27859477Swpaul } else { 27959477Swpaul PHY_WRITE(sc, BRGPHY_MII_1000CTL, 28059477Swpaul BRGPHY_1000CTL_MSE); 28159477Swpaul } 28259477Swpaul break; 28383597Swpaul#ifdef foo 28483597Swpaul case IFM_NONE: 28583597Swpaul PHY_WRITE(sc, MII_BMCR, BMCR_ISO|BMCR_PDOWN); 28683597Swpaul break; 28783597Swpaul#endif 28859477Swpaul case IFM_100_T4: 28959477Swpaul default: 29059477Swpaul return (EINVAL); 29159477Swpaul } 29259477Swpaul break; 29359477Swpaul 29459477Swpaul case MII_TICK: 29559477Swpaul /* 29659477Swpaul * If we're not currently selected, just return. 29759477Swpaul */ 29859477Swpaul if (IFM_INST(ife->ifm_media) != sc->mii_inst) 29959477Swpaul return (0); 30059477Swpaul 30159477Swpaul /* 30259477Swpaul * Is the interface even up? 30359477Swpaul */ 30459477Swpaul if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 30559477Swpaul return (0); 30659477Swpaul 30759477Swpaul /* 30884145Sjlemon * Only used for autonegotiation. 30959477Swpaul */ 31084145Sjlemon if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 31184145Sjlemon break; 31259477Swpaul 31359477Swpaul /* 31459477Swpaul * Check to see if we have link. If we do, we don't 31559477Swpaul * need to restart the autonegotiation process. Read 31659477Swpaul * the BMSR twice in case it's latched. 31759477Swpaul */ 31859477Swpaul reg = PHY_READ(sc, BRGPHY_MII_AUXSTS); 31959477Swpaul if (reg & BRGPHY_AUXSTS_LINK) 32059477Swpaul break; 32159477Swpaul 32284145Sjlemon /* 32384145Sjlemon * Only retry autonegotiation every 5 seconds. 32484145Sjlemon */ 32584145Sjlemon if (++sc->mii_ticks != 5) 32684145Sjlemon return (0); 32784145Sjlemon 32884145Sjlemon sc->mii_ticks = 0; 32959477Swpaul mii_phy_reset(sc); 33059477Swpaul if (brgphy_mii_phy_auto(sc, 0) == EJUSTRETURN) 33184145Sjlemon return (0); 33259477Swpaul break; 33359477Swpaul } 33459477Swpaul 33559477Swpaul /* Update the media status. */ 33659477Swpaul brgphy_status(sc); 33759477Swpaul 33859477Swpaul /* Callback if something changed. */ 33984145Sjlemon mii_phy_update(sc, cmd); 34059477Swpaul return (0); 34159477Swpaul} 34259477Swpaul 34384145Sjlemonstatic void 34459477Swpaulbrgphy_status(sc) 34559477Swpaul struct mii_softc *sc; 34659477Swpaul{ 34759477Swpaul struct mii_data *mii = sc->mii_pdata; 34883029Swpaul struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 34983029Swpaul int bmsr, bmcr; 35059477Swpaul 35159477Swpaul mii->mii_media_status = IFM_AVALID; 35259477Swpaul mii->mii_media_active = IFM_ETHER; 35359477Swpaul 35459477Swpaul bmsr = PHY_READ(sc, BRGPHY_MII_BMSR); 35559477Swpaul if (PHY_READ(sc, BRGPHY_MII_AUXSTS) & BRGPHY_AUXSTS_LINK) 35659477Swpaul mii->mii_media_status |= IFM_ACTIVE; 35759477Swpaul 35859477Swpaul bmcr = PHY_READ(sc, BRGPHY_MII_BMCR); 35959477Swpaul 36059477Swpaul if (bmcr & BRGPHY_BMCR_LOOP) 36159477Swpaul mii->mii_media_active |= IFM_LOOP; 36259477Swpaul 36359477Swpaul if (bmcr & BRGPHY_BMCR_AUTOEN) { 36459477Swpaul if ((bmsr & BRGPHY_BMSR_ACOMP) == 0) { 36559477Swpaul /* Erg, still trying, I guess... */ 36659477Swpaul mii->mii_media_active |= IFM_NONE; 36759477Swpaul return; 36859477Swpaul } 36959477Swpaul 37083029Swpaul switch (PHY_READ(sc, BRGPHY_MII_AUXSTS) & 37183029Swpaul BRGPHY_AUXSTS_AN_RES) { 37283029Swpaul case BRGPHY_RES_1000FD: 37383029Swpaul mii->mii_media_active |= IFM_1000_TX | IFM_FDX; 37483029Swpaul break; 37583029Swpaul case BRGPHY_RES_1000HD: 37683029Swpaul mii->mii_media_active |= IFM_1000_TX | IFM_HDX; 37783029Swpaul break; 37883029Swpaul case BRGPHY_RES_100FD: 37983029Swpaul mii->mii_media_active |= IFM_100_TX | IFM_FDX; 38083029Swpaul break; 38183029Swpaul case BRGPHY_RES_100T4: 38283029Swpaul mii->mii_media_active |= IFM_100_T4; 38383029Swpaul break; 38483029Swpaul case BRGPHY_RES_100HD: 38583029Swpaul mii->mii_media_active |= IFM_100_TX | IFM_HDX; 38683029Swpaul break; 38783029Swpaul case BRGPHY_RES_10FD: 38883029Swpaul mii->mii_media_active |= IFM_10_T | IFM_FDX; 38983029Swpaul break; 39083029Swpaul case BRGPHY_RES_10HD: 39183029Swpaul mii->mii_media_active |= IFM_10_T | IFM_HDX; 39283029Swpaul break; 39383029Swpaul default: 39483029Swpaul mii->mii_media_active |= IFM_NONE; 39583029Swpaul break; 39683029Swpaul } 39759477Swpaul return; 39859477Swpaul } 39959477Swpaul 40083029Swpaul mii->mii_media_active = ife->ifm_media; 40159477Swpaul 40259477Swpaul return; 40359477Swpaul} 40459477Swpaul 40559477Swpaul 40659477Swpaulstatic int 40759477Swpaulbrgphy_mii_phy_auto(mii, waitfor) 40859477Swpaul struct mii_softc *mii; 40959477Swpaul int waitfor; 41059477Swpaul{ 41183597Swpaul int bmsr, ktcr = 0, i; 41259477Swpaul 41359477Swpaul if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 41483597Swpaul mii_phy_reset(mii); 41583597Swpaul PHY_WRITE(mii, BRGPHY_MII_BMCR, 0); 41683597Swpaul DELAY(1000); 41783597Swpaul ktcr = PHY_READ(mii, BRGPHY_MII_1000CTL); 41883597Swpaul PHY_WRITE(mii, BRGPHY_MII_1000CTL, ktcr | 41959477Swpaul BRGPHY_1000CTL_AFD|BRGPHY_1000CTL_AHD); 42083597Swpaul ktcr = PHY_READ(mii, BRGPHY_MII_1000CTL); 42183597Swpaul DELAY(1000); 42283597Swpaul PHY_WRITE(mii, BRGPHY_MII_ANAR, 42383597Swpaul BMSR_MEDIA_TO_ANAR(mii->mii_capabilities) | ANAR_CSMA); 42483597Swpaul DELAY(1000); 42559477Swpaul PHY_WRITE(mii, BRGPHY_MII_BMCR, 42659477Swpaul BRGPHY_BMCR_AUTOEN | BRGPHY_BMCR_STARTNEG); 42759477Swpaul PHY_WRITE(mii, BRGPHY_MII_IMR, 0xFF00); 42859477Swpaul } 42959477Swpaul 43059477Swpaul if (waitfor) { 43159477Swpaul /* Wait 500ms for it to complete. */ 43259477Swpaul for (i = 0; i < 500; i++) { 43359477Swpaul if ((bmsr = PHY_READ(mii, BRGPHY_MII_BMSR)) & 43459477Swpaul BRGPHY_BMSR_ACOMP) 43559477Swpaul return (0); 43659477Swpaul DELAY(1000); 43759477Swpaul#if 0 43859477Swpaul if ((bmsr & BMSR_ACOMP) == 0) 43959477Swpaul printf("%s: autonegotiation failed to complete\n", 44059477Swpaul mii->mii_dev.dv_xname); 44159477Swpaul#endif 44259477Swpaul } 44359477Swpaul 44459477Swpaul /* 44559477Swpaul * Don't need to worry about clearing MIIF_DOINGAUTO. 44659477Swpaul * If that's set, a timeout is pending, and it will 44759477Swpaul * clear the flag. 44859477Swpaul */ 44959477Swpaul return (EIO); 45059477Swpaul } 45159477Swpaul 45259477Swpaul /* 45359477Swpaul * Just let it finish asynchronously. This is for the benefit of 45459477Swpaul * the tick handler driving autonegotiation. Don't want 500ms 45559477Swpaul * delays all the time while the system is running! 45659477Swpaul */ 45759477Swpaul if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) { 45859477Swpaul mii->mii_flags |= MIIF_DOINGAUTO; 45969925Swpaul mii->mii_auto_ch = timeout(mii_phy_auto_timeout, mii, hz >> 1); 46059477Swpaul } 46159477Swpaul return (EJUSTRETURN); 46259477Swpaul} 463