Index: brgphy.c
===================================================================
RCS file: /host/cvs/usr/cvs/src/sys/dev/mii/brgphy.c,v
retrieving revision 1.64
diff -u -r1.64 brgphy.c
--- brgphy.c	14 Feb 2007 18:21:32 -0000	1.64
+++ brgphy.c	16 Feb 2007 20:39:57 -0000
@@ -97,6 +97,7 @@
 static int	brgphy_mii_phy_auto(struct mii_softc *);
 static void	brgphy_reset(struct mii_softc *);
 static void	brgphy_loop(struct mii_softc *);
+static int	bcm5706_is_tbi(device_t);
 static void	bcm5401_load_dspcode(struct mii_softc *);
 static void	bcm5411_load_dspcode(struct mii_softc *);
 static void	brgphy_fixup_5704_a0_bug(struct mii_softc *);
@@ -122,6 +123,7 @@
 	MII_PHY_DESC(xxBROADCOM, BCM5752),
 	MII_PHY_DESC(xxBROADCOM, BCM5754),
 	MII_PHY_DESC(xxBROADCOM, BCM5780),
+	MII_PHY_DESC(xxBROADCOM, BCM5708C),
 	MII_PHY_DESC(xxBROADCOM_ALT1, BCM5787),
 	MII_PHY_END
 };
@@ -129,8 +131,29 @@
 static int
 brgphy_probe(device_t dev)
 {
+	struct mii_attach_args *ma;
+	int error;
 
-	return (mii_phy_dev_probe(dev, brgphys, BUS_PROBE_DEFAULT));
+	error = mii_phy_dev_probe(dev, brgphys, BUS_PROBE_DEFAULT);
+	if (error != BUS_PROBE_DEFAULT)
+		return (error);
+	
+	ma = device_get_ivars(dev);
+	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxBROADCOM &&
+	    MII_MODEL(ma->mii_id2) == MII_MODEL_xxBROADCOM_BCM5706C) {
+		/*
+		 * Broadcom uses the same MII model ID on two
+		 * different types of phys.  The first is found on the
+		 * BCM 5706 and is supported by this driver.  The
+		 * other is found on the BCM 5706S and 5708S and is
+		 * supported by the gentbi(4) driver, so we check to
+		 * see if this phy is supported by gentbi(4) and fail
+		 * the probe if so.
+		 */
+		if (bcm5706_is_tbi(dev))
+			return (ENXIO);
+	}
+	return (error);
 }
 
 static int
@@ -488,6 +511,34 @@
 	}
 }
 
+/*
+ * Check to see if a 5706 phy is really a SerDes phy.  Copied from
+ * gentbi_probe().
+ */
+static int
+bcm5706_is_tbi(device_t dev)
+{
+	device_t parent;
+	struct mii_attach_args *ma;
+	int bmsr, extsr;
+
+	parent = device_get_parent(dev);
+	ma = device_get_ivars(dev);
+
+	bmsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_BMSR);
+	if ((bmsr & BMSR_EXTSTAT) == 0 || (bmsr & BMSR_MEDIAMASK) != 0)
+		return (0);
+
+	extsr = MIIBUS_READREG(parent, ma->mii_phyno, MII_EXTSR);
+	if (extsr & (EXTSR_1000TFDX|EXTSR_1000THDX))
+		return (0);
+
+	if (extsr & (EXTSR_1000XFDX|EXTSR_1000XHDX))
+		return (1);
+
+	return (0);
+}
+
 /* Turn off tap power management on 5401. */
 static void
 bcm5401_load_dspcode(struct mii_softc *sc)
Index: miidevs
===================================================================
RCS file: /host/cvs/usr/cvs/src/sys/dev/mii/miidevs,v
retrieving revision 1.40
diff -u -r1.40 miidevs
--- miidevs	26 Jan 2007 17:05:24 -0000	1.40
+++ miidevs	16 Feb 2007 20:34:09 -0000
@@ -123,13 +123,14 @@
 model xxBROADCOM BCM5754	0x000e BCM5754 10/100/1000baseTX PHY
 model xxBROADCOM BCM5752	0x0010 BCM5752 10/100/1000baseTX PHY
 model xxBROADCOM BCM5701	0x0011 BCM5701 10/100/1000baseTX PHY
+model xxBROADCOM BCM5706C	0x0015 BCM5706C 10/100/1000baseTX PHY
 model xxBROADCOM BCM5703	0x0016 BCM5703 10/100/1000baseTX PHY
 model xxBROADCOM BCM5704	0x0019 BCM5704 10/100/1000baseTX PHY
 model xxBROADCOM BCM5705	0x001a BCM5705 10/100/1000baseTX PHY
 model xxBROADCOM BCM5750	0x0018 BCM5750 10/100/1000baseTX PHY
 model xxBROADCOM BCM5714	0x0034 BCM5714 10/100/1000baseTX PHY
 model xxBROADCOM BCM5780	0x0035 BCM5780 10/100/1000baseTX PHY
-model xxBROADCOM BCM5706C	0x0036 BCM5706C/5708C 10/100/1000baseTX PHY
+model xxBROADCOM BCM5708C	0x0036 BCM5708C 10/100/1000baseTX PHY
 model xxBROADCOM_ALT1 BCM5787	0x000e BCM5787 10/100/1000baseTX PHY
 
 /* Cicada Semiconductor PHYs (now owned by Vitesse?) */