add a PHY driver for the Lucent LU6612 10/100 PHY used on PCI

quad port hme(4)'s and other newer Sun systems with hme(4)'s.

derived from a diff posted to freebsd-sparc64 by
Marius Strobl <marius at alchemy dot franken dot de>

ok mickey@

1 files changed, 175 insertions, 0 deletions

diff --git a/sys/dev/mii/luphy.c b/sys/dev/mii/luphy.c
new file mode 100644
index 00000000000..aba6aa2d766
--- /dev/null
+++ b/sys/dev/mii/luphy.c
@@ -0,0 +1,175 @@
+/*	$OpenBSD: luphy.c,v 1.1 2005/04/14 19:54:01 brad Exp $	*/
+
+/*-
+ * Copyright (c) 2004 Marius Strobl
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+
+/*
+ * Driver for the Lucent Technologies LU6612 Ethernet 10/100 PHY, which
+ * is pin-compatible to the Quality Semiconductor QS6612 but uses a
+ * different register layout. Sun Microsystems uses the LU6612 together
+ * with their HME chip on a couple of bords originally designed for the
+ * QS6612. At least on these boards none of the LU6612 must be isolated
+ * otherwise the MII bus wedges and the other one (there can be a maximum
+ * of two PHYs connected to the HME) no longer can communicate with the
+ * HME (powering down the unused PHY etc. also doesn't help). This is
+ * why we can't use the ukphy driver for the LU6612.
+ * The datasheet for the LU6612 is no longer available on lucent.com or
+ * www.agere.com (former Lucent Microelectronics Group) but you still
+ * should be able to find it when searching for DS00355.pdf or LU6612.pdf.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.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>
+
+int	luphymatch(struct device *, void *, void *);
+void	luphyattach(struct device *, struct device *, void *);
+
+struct cfattach luphy_ca = {
+	sizeof(struct mii_softc), luphymatch, luphyattach, mii_phy_detach,
+	    mii_phy_activate
+};
+
+struct cfdriver luphy_cd = {
+	NULL, "luphy", DV_DULL
+};
+
+int	luphy_service(struct mii_softc *, struct mii_data *, int);
+
+const struct mii_phy_funcs luphy_funcs = {
+	luphy_service, ukphy_status, mii_phy_reset,
+};
+
+static const struct mii_phydesc luphys[] = {
+	{ MII_OUI_LUCENT,		MII_MODEL_LUCENT_LU6612,
+          MII_STR_QUALSEMI_QS6612 },
+
+	{ 0,			0,
+	  NULL },
+};
+
+int
+qsphymatch(struct device *parent, void *match, void *aux)
+{
+	struct mii_attach_args *ma = aux;
+
+	if (mii_phy_match(ma, luphys) != NULL)
+		return (10);
+
+	return (0);
+}
+
+void
+luphyattach(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;
+	const struct mii_phydesc *mpd;
+
+	mpd = mii_phy_match(ma, luphys);
+	printf(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2));
+
+	sc->mii_inst = mii->mii_instance;
+	sc->mii_phy = ma->mii_phyno;
+	sc->mii_funcs = &luphy_funcs;
+	sc->mii_pdata = mii;
+	sc->mii_flags = ma->mii_flags;
+
+	sc->mii_flags |= MIIF_NOISOLATE;
+
+	PHY_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
+luphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
+{
+	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
+
+	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,
+		 * just return. Isolating unused PHYs from the bus
+		 * causes at least the MII bus of the HME to wedge.
+		 */
+		if (IFM_INST(ife->ifm_media) != sc->mii_inst)
+			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);
+
+		if (mii_phy_tick(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);
+}