driver for the XAQTI XMACII phy from FreeBSD

1 files changed, 338 insertions, 0 deletions

diff --git a/sys/dev/mii/xmphy.c b/sys/dev/mii/xmphy.c
new file mode 100644
index 00000000000..264dd48956c
--- /dev/null
+++ b/sys/dev/mii/xmphy.c
@@ -0,0 +1,338 @@
+/*	$OpenBSD: xmphy.c,v 1.1 2000/08/28 13:40:23 jason Exp $	*/
+
+/*
+ * Copyright (c) 2000
+ *	Bill Paul <wpaul@ee.columbia.edu>.  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 Bill Paul.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
+ * 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.
+ *
+ * $FreeBSD: src/sys/dev/mii/xmphy.c,v 1.1 2000/04/22 01:58:18 wpaul Exp $
+ */
+
+/*
+ * driver for the XaQti XMAC II's internal PHY. This is sort of
+ * like a 10/100 PHY, except the only thing we're really autoselecting
+ * here is full/half duplex. Speed is always 1000mbps.
+ */
+
+#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/xmphyreg.h>
+
+int xmphy_probe __P((struct device *, void *, void *));
+void xmphy_attach __P((struct device *, struct device *, void *));
+
+struct cfattach xmphy_ca = {
+	sizeof(struct mii_softc), xmphy_probe, xmphy_attach, mii_phy_detach,
+	    mii_phy_activate
+};
+
+struct cfdriver xmphy_cd = {
+	NULL, "xmphy", DV_DULL
+};
+
+int	xmphy_service __P((struct mii_softc *, struct mii_data *, int));
+void	xmphy_status __P((struct mii_softc *));
+
+int	xmphy_mii_phy_auto __P((struct mii_softc *, int));
+extern void	mii_phy_auto_timeout __P((void *));
+
+int xmphy_probe(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct mii_attach_args *ma = aux;
+
+	if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxXAQTI &&
+	    MII_MODEL(ma->mii_id2) == MII_MODEL_XAQTI_XMACII)
+		return(10);
+
+	return(0);
+}
+
+void
+xmphy_attach(parent, self, aux)
+	struct device *parent, *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_XAQTI_XMACII, MII_REV(ma->mii_id2));
+
+	sc->mii_inst = mii->mii_instance;
+	sc->mii_phy = ma->mii_phyno;
+	sc->mii_service = xmphy_service;
+	sc->mii_status = xmphy_status;
+	sc->mii_pdata = mii;
+	sc->mii_flags |= MIIF_NOISOLATE;
+
+#define	ADD(m, c)	ifmedia_add(&mii->mii_media, (m), (c), NULL)
+
+	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst),
+	    BMCR_ISO);
+
+	mii_phy_reset(sc);
+
+	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, 0, sc->mii_inst),
+	    XMPHY_BMCR_FDX);
+	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_1000_SX, IFM_FDX, sc->mii_inst), 0);
+	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_AUTO, 0, sc->mii_inst), 0);
+
+#undef ADD
+}
+
+int
+xmphy_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;
+
+	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;
+
+		switch (IFM_SUBTYPE(ife->ifm_media)) {
+		case IFM_AUTO:
+			/*
+			 * If we're already in auto mode, just return.
+			 */
+			if (PHY_READ(sc, XMPHY_MII_BMCR) & XMPHY_BMCR_AUTOEN)
+				return (0);
+			(void) xmphy_mii_phy_auto(sc, 1);
+			break;
+		case IFM_1000_SX:
+			mii_phy_reset(sc);
+			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX) {
+				PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_FDX);
+				PHY_WRITE(sc, XMPHY_MII_BMCR, XMPHY_BMCR_FDX);
+			} else {
+				PHY_WRITE(sc, XMPHY_MII_ANAR, XMPHY_ANAR_HDX);
+				PHY_WRITE(sc, XMPHY_MII_BMCR, 0);
+			}
+			break;
+		case IFM_100_T4:
+		case IFM_100_TX:
+		case IFM_10_T:
+		default:
+			return (EINVAL);
+		}
+		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);
+
+		/*
+		 * Only retry autonegotiation every 5 seconds.
+		 */
+		if (++sc->mii_ticks != 5)
+			return (0);
+		
+		sc->mii_ticks = 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, XMPHY_MII_BMSR) |
+		    PHY_READ(sc, XMPHY_MII_BMSR);
+		if (reg & XMPHY_BMSR_LINK)
+			break;
+
+		mii_phy_reset(sc);
+		if (xmphy_mii_phy_auto(sc, 0) == EJUSTRETURN)
+			return(0);
+		break;
+	}
+
+	/* Update the media status. */
+	xmphy_status(sc);
+
+	/* Callback if something changed. */
+	mii_phy_update(sc, cmd);
+	return (0);
+}
+
+void
+xmphy_status(sc)
+	struct mii_softc *sc;
+{
+	struct mii_data *mii = sc->mii_pdata;
+	int bmsr, bmcr, anlpar;
+
+	mii->mii_media_status = IFM_AVALID;
+	mii->mii_media_active = IFM_ETHER;
+
+	bmsr = PHY_READ(sc, XMPHY_MII_BMSR) |
+	    PHY_READ(sc, XMPHY_MII_BMSR);
+	if (bmsr & XMPHY_BMSR_LINK)
+		mii->mii_media_status |= IFM_ACTIVE;
+
+	/* Do dummy read of extended status register. */
+	bmcr = PHY_READ(sc, XMPHY_MII_EXTSTS);
+
+	bmcr = PHY_READ(sc, XMPHY_MII_BMCR);
+
+	if (bmcr & XMPHY_BMCR_LOOP)
+		mii->mii_media_active |= IFM_LOOP;
+
+
+	if (bmcr & XMPHY_BMCR_AUTOEN) {
+		if ((bmsr & XMPHY_BMSR_ACOMP) == 0) {
+			if (bmsr & XMPHY_BMSR_LINK) {
+				mii->mii_media_active |= IFM_1000_SX|IFM_HDX;
+				return;
+			}
+			/* Erg, still trying, I guess... */
+			mii->mii_media_active |= IFM_NONE;
+			return;
+		}
+
+		mii->mii_media_active |= IFM_1000_SX;
+		anlpar = PHY_READ(sc, XMPHY_MII_ANAR) &
+		    PHY_READ(sc, XMPHY_MII_ANLPAR);
+		if (anlpar & XMPHY_ANLPAR_FDX)
+			mii->mii_media_active |= IFM_FDX;
+		else
+			mii->mii_media_active |= IFM_HDX;
+		return;
+	}
+
+	mii->mii_media_active |= IFM_1000_SX;
+	if (bmcr & XMPHY_BMCR_FDX)
+		mii->mii_media_active |= IFM_FDX;
+	else
+		mii->mii_media_active |= IFM_HDX;
+
+	return;
+}
+
+
+int
+xmphy_mii_phy_auto(mii, waitfor)
+	struct mii_softc *mii;
+	int waitfor;
+{
+	int bmsr, i;
+
+	if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
+		PHY_WRITE(mii, XMPHY_MII_ANAR,
+		    XMPHY_ANAR_FDX|XMPHY_ANAR_HDX);
+		PHY_WRITE(mii, XMPHY_MII_BMCR,
+		    XMPHY_BMCR_AUTOEN | XMPHY_BMCR_STARTNEG);
+	}
+
+	if (waitfor) {
+		/* Wait 500ms for it to complete. */
+		for (i = 0; i < 500; i++) {
+			if ((bmsr = PHY_READ(mii, XMPHY_MII_BMSR)) &
+			    XMPHY_BMSR_ACOMP)
+				return (0);
+			DELAY(1000);
+#if 0
+		if ((bmsr & BMSR_ACOMP) == 0)
+			printf("%s: autonegotiation failed to complete\n",
+			    mii->mii_dev.dv_xname);
+#endif
+		}
+
+		/*
+		 * Don't need to worry about clearing MIIF_DOINGAUTO.
+		 * If that's set, a timeout is pending, and it will
+		 * clear the flag.
+		 */
+		return (EIO);
+	}
+
+	/*
+	 * Just let it finish asynchronously.  This is for the benefit of
+	 * the tick handler driving autonegotiation.  Don't want 500ms
+	 * delays all the time while the system is running!
+	 */
+	if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
+		mii->mii_flags |= MIIF_DOINGAUTO;
+		timeout(mii_phy_auto_timeout, mii, hz >> 1);
+	}
+	return (EJUSTRETURN);
+}