driver for BCM5201/5202 PHY

1 files changed, 244 insertions, 0 deletions

diff --git a/sys/dev/mii/bmtphy.c b/sys/dev/mii/bmtphy.c
new file mode 100644
index 00000000000..7a3a86a77bf
--- /dev/null
+++ b/sys/dev/mii/bmtphy.c
@@ -0,0 +1,244 @@
+/*	$OpenBSD: bmtphy.c,v 1.1 2001/04/11 06:47:31 deraadt Exp $	*/
+/*	$NetBSD: nsphy.c,v 1.25 2000/02/02 23:34:57 thorpej Exp $	*/
+
+/*
+ * driver for Broadcom BCM5201/5202 Mini-Theta ethernet 10/100 PHY
+ * Data Sheet available from Broadcom
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+
+#include <net/if.h>
+#include <net/if_media.h>
+
+#include <dev/mii/mii.h>
+#include <dev/mii/miivar.h>
+#include <dev/mii/miidevs.h>
+
+#include <dev/mii/bmtphyreg.h>
+
+int	bmtphymatch __P((struct device *, void *, void *));
+void	bmtphyattach __P((struct device *, struct device *, void *));
+
+struct cfattach bmtphy_ca = {
+	sizeof(struct mii_softc), bmtphymatch, bmtphyattach, mii_phy_detach,
+	    mii_phy_activate
+};
+
+struct cfdriver bmtphy_cd = {
+	NULL, "bmtphy", DV_DULL
+};
+
+int	bmtphy_service __P((struct mii_softc *, struct mii_data *, int));
+void	bmtphy_status __P((struct mii_softc *));
+void	bmtphy_reset __P((struct mii_softc *));
+
+int
+bmtphymatch(parent, match, aux)
+	struct device *parent;
+	void *match;
+	void *aux;
+{
+	struct mii_attach_args *ma = aux;
+
+	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_BROADCOM &&
+	    MII_MODEL(ma->mii_id2) == MII_MODEL_BROADCOM_BCM5201)
+		return (10);
+
+	return (0);
+}
+
+void
+bmtphyattach(parent, self, aux)
+	struct device *parent;
+	struct device *self;
+	void *aux;
+{
+	struct mii_softc *sc = (struct mii_softc *)self;
+	struct mii_attach_args *ma = aux;
+	struct mii_data *mii = ma->mii_data;
+
+	printf(": %s, rev. %d\n", MII_STR_BROADCOM_BCM5201,
+	    MII_REV(ma->mii_id2));
+
+	sc->mii_inst = mii->mii_instance;
+	sc->mii_phy = ma->mii_phyno;
+	sc->mii_service = bmtphy_service;
+	sc->mii_status = bmtphy_status;
+	sc->mii_pdata = mii;
+	sc->mii_flags = mii->mii_flags;
+
+	bmtphy_reset(sc);
+
+	sc->mii_capabilities =
+	    PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
+	if (sc->mii_capabilities & BMSR_MEDIAMASK)
+		mii_phy_add_media(sc);
+}
+
+int
+bmtphy_service(sc, mii, cmd)
+	struct mii_softc *sc;
+	struct mii_data *mii;
+	int cmd;
+{
+	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
+	int reg;
+
+	if ((sc->mii_dev.dv_flags & DVF_ACTIVE) == 0)
+		return (ENXIO);
+
+	switch (cmd) {
+	case MII_POLLSTAT:
+		/*
+		 * If we're not polling our PHY instance, just return.
+		 */
+		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
+			return (0);
+		break;
+
+	case MII_MEDIACHG:
+		/*
+		 * If the media indicates a different PHY instance,
+		 * isolate ourselves.
+		 */
+		if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
+			reg = PHY_READ(sc, MII_BMCR);
+			PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
+			return (0);
+		}
+
+		/*
+		 * If the interface is not up, don't do anything.
+		 */
+		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
+			break;
+
+		mii_phy_setmedia(sc);
+		break;
+
+	case MII_TICK:
+		/*
+		 * If we're not currently selected, just return.
+		 */
+		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
+			return (0);
+
+		/*
+		 * Only used for autonegotiation.
+		 */
+		if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO)
+			return (0);
+
+		/*
+		 * Is the interface even up?
+		 */
+		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
+			return (0);
+
+		/*
+		 * Check to see if we have link.  If we do, we don't
+		 * need to restart the autonegotiation process.  Read
+		 * the BMSR twice in case it's latched.
+		 */
+		reg = PHY_READ(sc, MII_BMSR) |
+		    PHY_READ(sc, MII_BMSR);
+		if (reg & BMSR_LINK)
+			return (0);
+
+		/*
+		 * Only retry autonegotiation every 5 seconds.
+		 */
+		if (++sc->mii_ticks != 5)
+			return (0);
+
+		sc->mii_ticks = 0;
+		bmtphy_reset(sc);
+		if (mii_phy_auto(sc, 0) == EJUSTRETURN)
+			return (0);
+		break;
+
+	case MII_DOWN:
+		mii_phy_down(sc);
+		return (0);
+	}
+
+	/* Update the media status. */
+	mii_phy_status(sc);
+
+	/* Callback if something changed. */
+	mii_phy_update(sc, cmd);
+	return (0);
+}
+
+void
+bmtphy_status(sc)
+	struct mii_softc *sc;
+{
+	struct mii_data *mii = sc->mii_pdata;
+	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
+	int bmsr, bmcr, auxc;
+
+	mii->mii_media_status = IFM_AVALID;
+	mii->mii_media_active = IFM_ETHER;
+
+	bmsr = PHY_READ(sc, MII_BMSR) |
+	    PHY_READ(sc, MII_BMSR);
+	if (bmsr & BMSR_LINK)
+		mii->mii_media_status |= IFM_ACTIVE;
+
+	bmcr = PHY_READ(sc, MII_BMCR);
+	if (bmcr & BMCR_ISO) {
+		mii->mii_media_active |= IFM_NONE;
+		mii->mii_media_status = 0;
+		return;
+	}
+
+	if (bmcr & BMCR_LOOP)
+		mii->mii_media_active |= IFM_LOOP;
+
+	if (bmcr & BMCR_AUTOEN) {
+		/*
+		 * The later are only valid if autonegotiation
+		 * has completed (or it's disabled).
+		 */
+		if ((bmsr & BMSR_ACOMP) == 0) {
+			/* Erg, still trying, I guess... */
+			mii->mii_media_active |= IFM_NONE;
+			return;
+		}
+
+		auxc = PHY_READ(sc, MII_BMTPHY_AUXC);
+		if (auxc & AUXC_SP100)
+			mii->mii_media_active |= IFM_100_TX;
+		else
+			mii->mii_media_active |= IFM_10_T;
+		if (auxc & AUXC_FDX)
+			mii->mii_media_active |= IFM_FDX;
+
+	} else
+		mii->mii_media_active = ife->ifm_media;
+}
+
+void
+bmtphy_reset(sc)
+	struct mii_softc *sc;
+{
+	int anar;
+
+	mii_phy_reset(sc);
+
+	anar = PHY_READ(sc, MII_ANAR);
+	anar |= BMSR_MEDIA_TO_ANAR(PHY_READ(sc, MII_BMSR));
+	PHY_WRITE(sc, MII_ANAR, anar);
+
+        /* Chip resets with FDX bit not set */
+        PHY_WRITE(sc, MII_BMCR, PHY_READ(sc, MII_BMCR) |
+	    BMCR_S100|BMCR_AUTOEN|BMCR_STARTNEG|BMCR_FDX);
+}