Date: Thu, 12 May 2011 14:16:07 +0000 (UTC) From: Marius Strobl <marius@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r221812 - head/sys/dev/mii Message-ID: <201105121416.p4CEG73V040260@svn.freebsd.org>
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Author: marius Date: Thu May 12 14:16:07 2011 New Revision: 221812 URL: http://svn.freebsd.org/changeset/base/221812 Log: Some PHYs like the Level One LXT970 optionally can default to isolation after rest, in which case we may need to deisolate it. Tested by: nwhitehorn MFC after 1 week Modified: head/sys/dev/mii/mii_physubr.c Modified: head/sys/dev/mii/mii_physubr.c ============================================================================== --- head/sys/dev/mii/mii_physubr.c Thu May 12 14:03:29 2011 (r221811) +++ head/sys/dev/mii/mii_physubr.c Thu May 12 14:16:07 2011 (r221812) @@ -257,7 +257,7 @@ void mii_phy_reset(struct mii_softc *sc) { struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur; - int reg, i; + int i, reg; if ((sc->mii_flags & MIIF_NOISOLATE) != 0) reg = BMCR_RESET; @@ -273,11 +273,14 @@ mii_phy_reset(struct mii_softc *sc) DELAY(1000); } - if ((sc->mii_flags & MIIF_NOISOLATE) == 0) { - if ((ife == NULL && sc->mii_inst != 0) || - (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst)) - PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); - } + /* NB: a PHY may default to isolation. */ + reg &= ~BMCR_ISO; + if ((sc->mii_flags & MIIF_NOISOLATE) == 0 && + ((ife == NULL && sc->mii_inst != 0) || + (ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst))) + reg |= BMCR_ISO; + if (PHY_READ(sc, MII_BMCR) != reg) + PHY_WRITE(sc, MII_BMCR, reg); } void
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