Try this diff against -current. You'll have to apply
the patch from sys/dev/mii and run 'make' afterwards
to regenerate the headers.
Index: miidevs
===================================================================
RCS file: /cvs/src/sys/dev/mii/miidevs,v
retrieving revision 1.116
diff -u -p -r1.116 miidevs
--- miidevs 21 Jan 2011 09:46:13 -0000 1.116
+++ miidevs 19 Dec 2011 12:52:37 -0000
@@ -159,6 +159,7 @@ model xxBROADCOM2 BCM5709C 0x003c BCM570
model xxBROADCOM2 BCM5761 0x003d BCM5761 10/100/1000baseT PHY
model xxBROADCOM2 BCM5709S 0x003f BCM5709S 1000/2500baseSX PHY
model xxBROADCOM3 BCM57780 0x0019 BCM57780 10/100/1000baseT PHY
+model xxBROADCOM3 BCM57785 0x0024 BCM57785 10/100/1000baseT PHY
model BROADCOM BCM5400 0x0004 BCM5400 1000baseT PHY
model BROADCOM BCM5401 0x0005 BCM5401 1000baseT PHY
model BROADCOM BCM5411 0x0007 BCM5411 1000baseT PHY
Index: brgphy.c
===================================================================
RCS file: /cvs/src/sys/dev/mii/brgphy.c,v
retrieving revision 1.93
diff -u -p -r1.93 brgphy.c
--- brgphy.c 24 May 2010 21:23:23 -0000 1.93
+++ brgphy.c 19 Dec 2011 12:52:37 -0000
@@ -176,6 +176,8 @@ static const struct mii_phydesc brgphys[
MII_STR_xxBROADCOM2_BCM5709CAX },
{ MII_OUI_xxBROADCOM3, MII_MODEL_xxBROADCOM3_BCM57780,
MII_STR_xxBROADCOM3_BCM57780 },
+ { MII_OUI_xxBROADCOM3, MII_MODEL_xxBROADCOM3_BCM57785,
+ MII_STR_xxBROADCOM3_BCM57785 },
{ MII_OUI_BROADCOM2, MII_MODEL_BROADCOM2_BCM5906,
MII_STR_BROADCOM2_BCM5906 },
