OpenBSD gets sys/dev/mii layer from NetBSD

1 files changed, 397 insertions, 0 deletions

diff --git a/sys/dev/mii/inphy.c b/sys/dev/mii/inphy.c
new file mode 100644
index 00000000000..70cedb54345
--- /dev/null
+++ b/sys/dev/mii/inphy.c
@@ -0,0 +1,397 @@
+/*	$OpenBSD: inphy.c,v 1.1 1998/09/10 17:17:33 jason Exp $	*/
+/*	$NetBSD: inphy.c,v 1.3 1998/08/12 20:56:35 thorpej Exp $	*/
+
+/*-
+ * Copyright (c) 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
+ * NASA Ames Research Center.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the NetBSD
+ *	Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Copyright (c) 1997 Manuel Bouyer.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Manuel Bouyer.
+ * 4. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * driver for Intel's i82555 ethernet 10/100 PHY
+ * Data Sheet available from www.intel.com
+ */
+
+#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 <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/inphyreg.h>
+
+struct inphy_softc {
+	struct mii_softc sc_mii;		/* generic PHY */
+	int sc_capabilities;
+	int sc_ticks;
+	int sc_active;
+};
+
+#ifdef __NetBSD__
+int	inphymatch __P((struct device *, struct cfdata *, void *));
+#else
+int	inphymatch __P((struct device *, void *, void *));
+#endif
+void	inphyattach __P((struct device *, struct device *, void *));
+
+struct cfattach inphy_ca = {
+	sizeof(struct inphy_softc), inphymatch, inphyattach
+};
+
+#ifdef __OpenBSD__
+struct cfdriver inphy_cd = {
+	NULL, "inphy", DV_DULL
+};
+#endif
+
+#define	INPHY_READ(sc, reg) \
+    (*(sc)->sc_mii.mii_pdata->mii_readreg)((sc)->sc_mii.mii_dev.dv_parent, \
+	(sc)->sc_mii.mii_phy, (reg))
+
+#define	INPHY_WRITE(sc, reg, val) \
+    (*(sc)->sc_mii.mii_pdata->mii_writereg)((sc)->sc_mii.mii_dev.dv_parent, \
+	(sc)->sc_mii.mii_phy, (reg), (val))
+
+int	inphy_service __P((struct mii_softc *, struct mii_data *, int));
+void	inphy_reset __P((struct inphy_softc *));
+void	inphy_auto __P((struct inphy_softc *));
+void	inphy_status __P((struct inphy_softc *));
+
+int
+inphymatch(parent, match, aux)
+	struct device *parent;
+#ifdef __NetBSD__
+	struct cfdata *match;
+#else
+	void *match;
+#endif
+	void *aux;
+{
+	struct mii_attach_args *ma = aux;
+
+	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_INTEL &&
+	    MII_MODEL(ma->mii_id2) == MII_MODEL_INTEL_I82555)
+		return (1);
+
+	return (0);
+}
+
+void
+inphyattach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct inphy_softc *sc = (struct inphy_softc *)self;
+	struct mii_attach_args *ma = aux;
+	struct mii_data *mii = ma->mii_data;
+
+	printf(": %s, rev. %d\n", MII_STR_INTEL_I82555,
+	    MII_REV(ma->mii_id2));
+
+	sc->sc_mii.mii_inst = mii->mii_instance;
+	sc->sc_mii.mii_phy = ma->mii_phyno;
+	sc->sc_mii.mii_service = inphy_service;
+	sc->sc_mii.mii_pdata = mii;
+
+#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
+
+#if 0
+	/* Can't do this on the i82557! */
+	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->sc_mii.mii_inst),
+	    BMCR_ISO);
+#endif
+	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->sc_mii.mii_inst),
+	    BMCR_LOOP|BMCR_S100);
+
+	inphy_reset(sc);
+
+	sc->sc_capabilities = INPHY_READ(sc, MII_BMSR) & ma->mii_capmask;
+	printf("%s: ", sc->sc_mii.mii_dev.dv_xname);
+	if ((sc->sc_capabilities & BMSR_MEDIAMASK) == 0)
+		printf("no media present");
+	else
+		mii_add_media(mii, sc->sc_capabilities, sc->sc_mii.mii_inst);
+	printf("\n");
+#undef ADD
+}
+
+int
+inphy_service(self, mii, cmd)
+	struct mii_softc *self;
+	struct mii_data *mii;
+	int cmd;
+{
+	struct inphy_softc *sc = (struct inphy_softc *)self;
+	int reg;
+
+	switch (cmd) {
+	case MII_POLLSTAT:
+		/*
+		 * If we're not polling our PHY instance, just return.
+		 */
+		if (IFM_INST(mii->mii_media.ifm_media) !=
+		    sc->sc_mii.mii_inst)
+			return (0);
+		break;
+
+	case MII_MEDIACHG:
+		/*
+		 * If the media indicates a different PHY instance,
+		 * isolate ourselves.
+		 */
+		if (IFM_INST(mii->mii_media.ifm_media) !=
+		    sc->sc_mii.mii_inst) {
+			reg = INPHY_READ(sc, MII_BMCR);
+			INPHY_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;
+
+		switch (IFM_SUBTYPE(mii->mii_media.ifm_media)) {
+		case IFM_AUTO:
+			/*
+			 * If we're already in auto mode, just return.
+			 */
+			if (INPHY_READ(sc, MII_BMCR) & BMCR_AUTOEN)
+				return (0);
+			inphy_auto(sc);
+			break;
+		case IFM_100_T4:
+			/*
+			 * XXX Not supported as a manual setting right now.
+			 */
+			return (EINVAL);
+		default:
+			/*
+			 * BMCR data is stored in the ifmedia entry.
+			 */
+			INPHY_WRITE(sc, MII_ANAR,
+			    mii_anar(mii->mii_media.ifm_media));
+			INPHY_WRITE(sc, MII_BMCR,
+			    mii->mii_media.ifm_cur->ifm_data);
+		}
+		break;
+
+	case MII_TICK:
+		/*
+		 * If we're not currently selected, just return.
+		 */
+		if (IFM_INST(mii->mii_media.ifm_media) !=
+		    sc->sc_mii.mii_inst)
+			return (0);
+
+		/*
+		 * Only used for autonegotiation.
+		 */
+		if (IFM_SUBTYPE(mii->mii_media.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 = INPHY_READ(sc, MII_BMSR) | INPHY_READ(sc, MII_BMSR);
+		if (reg & BMSR_LINK)
+			return (0);
+
+		/*
+		 * Only retry autonegotiation every 5 seconds.
+		 */
+		if (++sc->sc_ticks != 5)
+			return (0);
+
+		sc->sc_ticks = 0;
+		inphy_reset(sc);
+		inphy_auto(sc);
+		break;
+	}
+
+	/* Update the media status. */
+	inphy_status(sc);
+
+	/* Callback if something changed. */
+	if (sc->sc_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
+		(*mii->mii_statchg)(sc->sc_mii.mii_dev.dv_parent);
+		sc->sc_active = mii->mii_media_active;
+	}
+	return (0);
+}
+
+void
+inphy_status(sc)
+	struct inphy_softc *sc;
+{
+	struct mii_data *mii = sc->sc_mii.mii_pdata;
+	int bmsr, bmcr, scr;
+
+	mii->mii_media_status = IFM_AVALID;
+	mii->mii_media_active = IFM_ETHER;
+
+	bmsr = INPHY_READ(sc, MII_BMSR) | INPHY_READ(sc, MII_BMSR);
+	if (bmsr & BMSR_LINK)
+		mii->mii_media_status |= IFM_ACTIVE;
+
+	bmcr = INPHY_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) {
+		if ((bmsr & BMSR_ACOMP) == 0) {
+			/* Erg, still trying, I guess... */
+			mii->mii_media_active |= IFM_NONE;
+			return;
+		}
+		scr = INPHY_READ(sc, MII_INPHY_SCR);
+		if (scr & SCR_T4)
+			mii->mii_media_active |= IFM_100_T4;
+		else if (scr & SCR_S100)
+			mii->mii_media_active |= IFM_100_TX;
+		else
+			mii->mii_media_active |= IFM_10_T;
+		if (scr & SCR_FDX)
+			mii->mii_media_active |= IFM_FDX;
+	} else {
+		if (bmcr & BMCR_S100)
+			mii->mii_media_active |= IFM_100_TX;
+		else
+			mii->mii_media_active |= IFM_10_T;
+		if (bmcr & BMCR_FDX)
+			mii->mii_media_active |= IFM_FDX;
+	}
+}
+
+void
+inphy_auto(sc)
+	struct inphy_softc *sc;
+{
+	int bmsr, i;
+
+	INPHY_WRITE(sc, MII_ANAR,
+	    BMSR_MEDIA_TO_ANAR(sc->sc_capabilities) | ANAR_CSMA);
+	INPHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG);
+
+	/* Wait 500ms for it to complete. */
+	for (i = 0; i < 500; i++) {
+		if ((bmsr = INPHY_READ(sc, MII_BMSR)) & BMSR_ACOMP)
+			return;
+		delay(1000);
+	}
+#if 0
+	if ((bmsr & BMSR_ACOMP) == 0)
+		printf("%s: autonegotiation failed to complete\n",
+		    sc->sc_mii.mii_dev.dv_xname);
+#endif
+}
+
+void
+inphy_reset(sc)
+	struct inphy_softc *sc;
+{
+	int reg, i;
+
+	/*
+	 * The i82557 wedges if we isolate all of its PHYs!
+	 */
+	if (sc->sc_mii.mii_inst == 0)
+		INPHY_WRITE(sc, MII_BMCR, BMCR_RESET);
+	else
+		INPHY_WRITE(sc, MII_BMCR, BMCR_RESET|BMCR_ISO);
+
+	/* Wait 100ms for it to complete. */
+	for (i = 0; i < 100; i++) {
+		reg = INPHY_READ(sc, MII_BMCR);
+		if ((reg & BMCR_RESET) == 0)
+			break;
+		delay(1000);
+	}
+
+	/* Make sure the PHY is isolated. */
+	if (sc->sc_mii.mii_inst != 0)
+		INPHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
+}