From d46e1313de834aa1c7b7d84f62008c7d642800f8 Mon Sep 17 00:00:00 2001
From: wpaul <wpaul@FreeBSD.org>
Date: Mon, 24 Jan 2000 17:19:37 +0000
Subject: Add support for DM9102A boards with Davicom DM9801 HomePNA PHYs.

---
 sys/pci/if_dc.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 77 insertions(+), 7 deletions(-)

(limited to 'sys/pci')

diff --git a/sys/pci/if_dc.c b/sys/pci/if_dc.c
index ccd6191..4e1c98b 100644
--- a/sys/pci/if_dc.c
+++ b/sys/pci/if_dc.c
@@ -233,6 +233,7 @@ static int dc_mii_writereg	__P((struct dc_softc *, struct dc_mii_frame *));
 static int dc_miibus_readreg	__P((device_t, int, int));
 static int dc_miibus_writereg	__P((device_t, int, int, int));
 static void dc_miibus_statchg	__P((device_t));
+static void dc_miibus_mediainit	__P((device_t));
 
 static void dc_setcfg		__P((struct dc_softc *, int));
 static u_int32_t dc_crc_le	__P((struct dc_softc *, caddr_t));
@@ -270,6 +271,7 @@ static device_method_t dc_methods[] = {
 	DEVMETHOD(miibus_readreg,	dc_miibus_readreg),
 	DEVMETHOD(miibus_writereg,	dc_miibus_writereg),
 	DEVMETHOD(miibus_statchg,	dc_miibus_statchg),
+	DEVMETHOD(miibus_mediainit,	dc_miibus_mediainit),
 
 	{ 0, 0 }
 };
@@ -761,9 +763,10 @@ static int dc_miibus_readreg(dev, phy, reg)
 
 	frame.mii_phyaddr = phy;
 	frame.mii_regaddr = reg;
-	DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+	phy_reg = CSR_READ_4(sc, DC_NETCFG);
+	CSR_WRITE_4(sc, DC_NETCFG, phy_reg & ~DC_NETCFG_PORTSEL);
 	dc_mii_readreg(sc, &frame);
-	DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+	CSR_WRITE_4(sc, DC_NETCFG, phy_reg);
 
 	return(frame.mii_data);
 }
@@ -830,9 +833,10 @@ static int dc_miibus_writereg(dev, phy, reg, data)
 	frame.mii_regaddr = reg;
 	frame.mii_data = data;
 
-	DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+	phy_reg = CSR_READ_4(sc, DC_NETCFG);
+	CSR_WRITE_4(sc, DC_NETCFG, phy_reg & ~DC_NETCFG_PORTSEL);
 	dc_mii_writereg(sc, &frame);
-	DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+	CSR_WRITE_4(sc, DC_NETCFG, phy_reg);
 
 	return(0);
 }
@@ -842,13 +846,49 @@ static void dc_miibus_statchg(dev)
 {
 	struct dc_softc		*sc;
 	struct mii_data		*mii;
+	struct ifmedia		*ifm;
 
 	sc = device_get_softc(dev);
 	if (DC_IS_ADMTEK(sc))
 		return;
 	mii = device_get_softc(sc->dc_miibus);
-	dc_setcfg(sc, mii->mii_media_active);
-	sc->dc_if_media = mii->mii_media_active;
+	ifm = &mii->mii_media;
+	if (DC_IS_DAVICOM(sc) &&
+	    IFM_SUBTYPE(ifm->ifm_media) == IFM_homePNA) {
+		dc_setcfg(sc, ifm->ifm_media);
+		sc->dc_if_media = ifm->ifm_media;
+	} else {
+		dc_setcfg(sc, mii->mii_media_active);
+		sc->dc_if_media = mii->mii_media_active;
+	}
+
+	return;
+}
+
+/*
+ * Special support for DM9102A cards with HomePNA PHYs. Note:
+ * with the Davicom DM9102A/DM9801 eval board that I have, it seems
+ * to be impossible to talk to the management interface of the DM9801
+ * PHY (its MDIO pin is not connected to anything). Consequently,
+ * the driver has to just 'know' about the additional mode and deal
+ * with it itself. *sigh*
+ */
+static void dc_miibus_mediainit(dev)
+	device_t		dev;
+{
+	struct dc_softc		*sc;
+	struct mii_data		*mii;
+	struct ifmedia		*ifm;
+	int			rev;
+
+	rev = pci_read_config(dev, DC_PCI_CFRV, 4) & 0xFF;
+
+	sc = device_get_softc(dev);
+	mii = device_get_softc(sc->dc_miibus);
+	ifm = &mii->mii_media;
+
+	if (DC_IS_DAVICOM(sc) && rev >= DC_REVISION_DM9102A)
+		ifmedia_add(ifm, IFM_ETHER|IFM_homePNA, 0, NULL);
 
 	return;
 }
@@ -1208,6 +1248,20 @@ static void dc_setcfg(sc, media)
 		}
 	}
 
+	/*
+	 * If this is a Davicom DM9102A card with a DM9801 HomePNA
+	 * PHY and we want HomePNA mode, set the portsel bit to turn
+	 * on the external MII port.
+	 */
+	if (DC_IS_DAVICOM(sc)) {
+		if (IFM_SUBTYPE(media) == IFM_homePNA) {
+			DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+			sc->dc_link = 1;
+		} else {
+			DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+		}
+	}
+
 	if ((media & IFM_GMASK) == IFM_FDX) {
 		DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX);
 		if (sc->dc_pmode == DC_PMODE_SYM && DC_IS_PNIC(sc))
@@ -2626,11 +2680,18 @@ static int dc_ifmedia_upd(ifp)
 {
 	struct dc_softc		*sc;
 	struct mii_data		*mii;
+	struct ifmedia		*ifm;
 
 	sc = ifp->if_softc;
 	mii = device_get_softc(sc->dc_miibus);
 	mii_mediachg(mii);
-	sc->dc_link = 0;
+	ifm = &mii->mii_media;
+
+	if (DC_IS_DAVICOM(sc) &&
+	    IFM_SUBTYPE(ifm->ifm_media) == IFM_homePNA)
+		dc_setcfg(sc, ifm->ifm_media);
+	else
+		sc->dc_link = 0;
 
 	return(0);
 }
@@ -2644,10 +2705,19 @@ static void dc_ifmedia_sts(ifp, ifmr)
 {
 	struct dc_softc		*sc;
 	struct mii_data		*mii;
+	struct ifmedia		*ifm;
 
 	sc = ifp->if_softc;
 	mii = device_get_softc(sc->dc_miibus);
 	mii_pollstat(mii);
+	ifm = &mii->mii_media;
+	if (DC_IS_DAVICOM(sc)) {
+		if (IFM_SUBTYPE(ifm->ifm_media) == IFM_homePNA) {
+			ifmr->ifm_active = ifm->ifm_media;
+			ifmr->ifm_status = 0;
+			return;
+		}
+	}
 	ifmr->ifm_active = mii->mii_media_active;
 	ifmr->ifm_status = mii->mii_media_status;
 
-- 
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