From 1b5c7e39eb0b780c7c57a51fd857c951802d521f Mon Sep 17 00:00:00 2001
From: Brad Smith <brad@cvs.openbsd.org>
Date: Sun, 6 Nov 2005 07:25:06 +0000
Subject: re-merge old brgphy_mii_phy_auto().

---
 sys/dev/mii/brgphy.c | 73 +++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 52 insertions(+), 21 deletions(-)

diff --git a/sys/dev/mii/brgphy.c b/sys/dev/mii/brgphy.c
index 6122a882c90..4d22d1c1309 100644
--- a/sys/dev/mii/brgphy.c
+++ b/sys/dev/mii/brgphy.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: brgphy.c,v 1.39 2005/11/06 03:49:28 brad Exp $	*/
+/*	$OpenBSD: brgphy.c,v 1.40 2005/11/06 07:25:05 brad Exp $	*/
 
 /*
  * Copyright (c) 2000
@@ -80,7 +80,7 @@ struct cfdriver brgphy_cd = {
 
 int	brgphy_service(struct mii_softc *, struct mii_data *, int);
 void	brgphy_status(struct mii_softc *);
-int	brgphy_mii_phy_auto(struct mii_softc *);
+int	brgphy_mii_phy_auto(struct mii_softc *, int);
 void	brgphy_loop(struct mii_softc *);
 void	brgphy_reset(struct mii_softc *);
 void	brgphy_load_dspcode(struct mii_softc *);
@@ -217,7 +217,7 @@ brgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
 			if (PHY_READ(sc, BRGPHY_MII_BMCR) & BRGPHY_BMCR_AUTOEN)
 				return (0);
 #endif
-			(void) brgphy_mii_phy_auto(sc);
+			(void) brgphy_mii_phy_auto(sc, 1);
 			break;
 		case IFM_1000_T:
 			speed = BRGPHY_S1000;
@@ -309,8 +309,9 @@ setit:
 			break;
 
 		sc->mii_ticks = 0;
-		brgphy_mii_phy_auto(sc);
-		return (0);
+		if (brgphy_mii_phy_auto(sc, 0) == EJUSTRETURN)
+			return (0);
+		break;
 	}
 
 	/* Update the media status. */
@@ -397,24 +398,54 @@ brgphy_status(struct mii_softc *sc)
 
 
 int
-brgphy_mii_phy_auto(struct mii_softc *sc)
+brgphy_mii_phy_auto(struct mii_softc *sc, int waitfor)
 {
-	int ktcr = 0;
+	int bmsr, ktcr = 0, i;
+
+	if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
+		brgphy_loop(sc);
+		PHY_RESET(sc);
+		ktcr = BRGPHY_1000CTL_AFD|BRGPHY_1000CTL_AHD;
+		if (sc->mii_model == MII_MODEL_xxBROADCOM_BCM5701)
+			ktcr |= BRGPHY_1000CTL_MSE|BRGPHY_1000CTL_MSC;
+		PHY_WRITE(sc, BRGPHY_MII_1000CTL, ktcr);
+		ktcr = PHY_READ(sc, BRGPHY_MII_1000CTL);
+		DELAY(1000);
+		PHY_WRITE(sc, BRGPHY_MII_ANAR,
+		    BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA);
+		DELAY(1000);
+		PHY_WRITE(sc, BRGPHY_MII_BMCR,
+		    BRGPHY_BMCR_AUTOEN | BRGPHY_BMCR_STARTNEG);
+		PHY_WRITE(sc, BRGPHY_MII_IMR, 0xFF00);
+	}
 
-	brgphy_loop(sc);
-	PHY_RESET(sc);
-	ktcr = BRGPHY_1000CTL_AFD|BRGPHY_1000CTL_AHD;
-	if (sc->mii_model == MII_MODEL_xxBROADCOM_BCM5701)
-		ktcr |= BRGPHY_1000CTL_MSE|BRGPHY_1000CTL_MSC;
-	PHY_WRITE(sc, BRGPHY_MII_1000CTL, ktcr);
-	ktcr = PHY_READ(sc, BRGPHY_MII_1000CTL);
-	DELAY(1000);
-	PHY_WRITE(sc, BRGPHY_MII_ANAR,
-	    BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA);
-	DELAY(1000);
-	PHY_WRITE(sc, BRGPHY_MII_BMCR,
-	    BRGPHY_BMCR_AUTOEN | BRGPHY_BMCR_STARTNEG);
-	PHY_WRITE(sc, BRGPHY_MII_IMR, 0xFF00);
+	if (waitfor) {
+		/* Wait 500ms for it to complete. */
+		for (i = 0; i < 500; i++) {
+			if ((bmsr = PHY_READ(sc, BRGPHY_MII_BMSR)) &
+			    BRGPHY_BMSR_ACOMP)
+				return (0);
+			DELAY(1000);
+		}
+
+		/*
+		 * Don't need to worry about clearing MIIF_DOINGAUTO.
+		 * If that's set, a timeout is pending, and it will
+		 * clear the flag.
+		 */
+		return (EIO);
+	}
+
+	/*
+	 * Just let it finish asynchronously.  This is for the benefit of
+	 * the tick handler driving autonegotiation.  Don't want 500ms
+	 * delays all the time while the system is running!
+	 */
+	if ((sc->mii_flags & MIIF_DOINGAUTO) == 0) {
+		sc->mii_flags |= MIIF_DOINGAUTO;
+		timeout_set(&sc->mii_phy_timo, mii_phy_auto_timeout, sc);
+		timeout_add(&sc->mii_phy_timo, hz / 2);
+	}
 
 	return (EJUSTRETURN);
 }
-- 
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