Add the if_dc driver and remove all of the al, ax, dm, pn and mx drivers

which it replaces. The new driver supports all of the chips supported
by the ones it replaces, as well as many DEC/Intel 21143 10/100 cards.

This also completes my quest to convert things to miibus and add
Alpha support.

1 files changed, 528 insertions, 0 deletions

diff --git a/sys/dev/mii/dcphy.c b/sys/dev/mii/dcphy.c
new file mode 100644
index 0000000..2543e87
--- /dev/null
+++ b/sys/dev/mii/dcphy.c
@@ -0,0 +1,528 @@
+/*
+ * Copyright (c) 1997, 1998, 1999
+ *	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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Pseudo-driver for internal NWAY support on DEC 21143 and workalike
+ * controllers. Technically we're abusing the miibus code to handle
+ * media selection and NWAY support here since there is no MII
+ * interface. However the logical operations are roughly the same,
+ * and the alternative is to create a fake MII interface in the driver,
+ * which is harder to do.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/socket.h>
+#include <sys/errno.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <net/if_media.h>
+
+#include <dev/mii/mii.h>
+#include <dev/mii/miivar.h>
+#include <dev/mii/miidevs.h>
+
+#include <machine/clock.h>
+#include <machine/bus_pio.h>
+#include <machine/bus_memio.h>
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/bus.h>
+
+#include <pci/pcivar.h>
+
+#include <pci/if_dcreg.h>
+
+#include "miibus_if.h"
+
+#if !defined(lint)
+static const char rcsid[] =
+  "$FreeBSD$";
+#endif
+
+#define DC_SETBIT(sc, reg, x)                           \
+        CSR_WRITE_4(sc, reg,                            \
+                CSR_READ_4(sc, reg) | x)
+
+#define DC_CLRBIT(sc, reg, x)                           \
+        CSR_WRITE_4(sc, reg,                            \
+                CSR_READ_4(sc, reg) & ~x)
+
+#define MIIF_AUTOTIMEOUT	0x0004
+
+static int dcphy_probe		__P((device_t));
+static int dcphy_attach		__P((device_t));
+static int dcphy_detach		__P((device_t));
+
+static device_method_t dcphy_methods[] = {
+	/* device interface */
+	DEVMETHOD(device_probe,		dcphy_probe),
+	DEVMETHOD(device_attach,	dcphy_attach),
+	DEVMETHOD(device_detach,	dcphy_detach),
+	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
+	{ 0, 0 }
+};
+
+static devclass_t dcphy_devclass;
+
+static driver_t dcphy_driver = {
+	"dcphy",
+	dcphy_methods,
+	sizeof(struct mii_softc)
+};
+
+DRIVER_MODULE(dcphy, miibus, dcphy_driver, dcphy_devclass, 0, 0);
+
+int	dcphy_service __P((struct mii_softc *, struct mii_data *, int));
+void	dcphy_status __P((struct mii_softc *));
+static int dcphy_auto		__P((struct mii_softc *, int));
+static void dcphy_reset		__P((struct mii_softc *));
+
+static int dcphy_probe(dev)
+	device_t		dev;
+{
+	struct mii_attach_args *ma;
+
+	ma = device_get_ivars(dev);
+
+	/*
+	 * The dc driver will report the 21143 vendor and device
+	 * ID to let us know that it wants us to attach.
+	 */
+	if (ma->mii_id1 != DC_VENDORID_DEC ||
+	    ma->mii_id2 != DC_DEVICEID_21143)
+		return(ENXIO);
+
+	device_set_desc(dev, "Intel 21143 NWAY media interface");
+
+	return (0);
+}
+
+static int dcphy_attach(dev)
+	device_t		dev;
+{
+	struct mii_softc *sc;
+	struct mii_attach_args *ma;
+	struct mii_data *mii;
+	struct dc_softc		*dc_sc;
+
+	sc = device_get_softc(dev);
+	ma = device_get_ivars(dev);
+	sc->mii_dev = device_get_parent(dev);
+	mii = device_get_softc(sc->mii_dev);
+	LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
+
+	sc->mii_inst = mii->mii_instance;
+	sc->mii_phy = ma->mii_phyno;
+	sc->mii_service = dcphy_service;
+	sc->mii_pdata = mii;
+
+	sc->mii_flags |= MIIF_NOISOLATE;
+	mii->mii_instance++;
+
+#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);
+
+	ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst),
+	    BMCR_LOOP|BMCR_S100);
+
+	/*dcphy_reset(sc);*/
+	dc_sc = mii->mii_ifp->if_softc;
+	CSR_WRITE_4(dc_sc, DC_10BTSTAT, 0);
+	CSR_WRITE_4(dc_sc, DC_10BTCTRL, 0);
+
+	switch(pci_read_config(device_get_parent(sc->mii_dev),
+	    DC_PCI_CSID, 4)) {
+	case 0x99999999:
+		/* Example of how to only allow 10Mbps modes. */
+		sc->mii_capabilities = BMSR_10TFDX|BMSR_10THDX;
+		break;
+	default:
+		sc->mii_capabilities =
+		    BMSR_ANEG|BMSR_100TXFDX|BMSR_100TXHDX|
+		    BMSR_10TFDX|BMSR_10THDX;
+		break;
+	}
+
+	sc->mii_capabilities &= ma->mii_capmask;
+	device_printf(dev, " ");
+	if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0)
+		printf("no media present");
+	else
+		mii_add_media(mii, sc->mii_capabilities, sc->mii_inst);
+	printf("\n");
+#undef ADD
+
+	MIIBUS_MEDIAINIT(sc->mii_dev);
+	return(0);
+}
+
+static int dcphy_detach(dev)
+	device_t		dev;
+{
+	struct mii_softc *sc;
+	struct mii_data *mii;
+
+	sc = device_get_softc(dev);
+	mii = device_get_softc(device_get_parent(dev));
+	sc->mii_dev = NULL;
+	LIST_REMOVE(sc, mii_list);
+
+	return(0);
+}
+
+int
+dcphy_service(sc, mii, cmd)
+	struct mii_softc *sc;
+	struct mii_data *mii;
+	int cmd;
+{
+	struct dc_softc		*dc_sc;
+	struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
+	int reg;
+	u_int32_t		mode;
+
+	dc_sc = mii->mii_ifp->if_softc;
+
+	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) {
+			return (0);
+		}
+
+		/*
+		 * If the interface is not up, don't do anything.
+		 */
+		if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
+			break;
+
+		sc->mii_flags = 0;
+		mii->mii_media_active = IFM_NONE;
+		mode = CSR_READ_4(dc_sc, DC_NETCFG);
+		mode &= ~(DC_NETCFG_FULLDUPLEX|DC_NETCFG_PORTSEL|
+		    DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER|DC_NETCFG_SPEEDSEL);
+
+		switch (IFM_SUBTYPE(ife->ifm_media)) {
+		case IFM_AUTO:
+			/*dcphy_reset(sc);*/
+			(void) dcphy_auto(sc, 0);
+			break;
+		case IFM_100_T4:
+			/*
+			 * XXX Not supported as a manual setting right now.
+			 */
+			return (EINVAL);
+		case IFM_100_TX:
+			dcphy_reset(sc);
+			DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
+			mode |= DC_NETCFG_PORTSEL|DC_NETCFG_PCS|
+			    DC_NETCFG_SCRAMBLER;
+			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
+				mode |= DC_NETCFG_FULLDUPLEX;
+			else
+				mode &= ~DC_NETCFG_FULLDUPLEX;
+			CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
+			break;
+		case IFM_10_T:
+			DC_CLRBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
+			DC_CLRBIT(dc_sc, DC_10BTCTRL, 0xFFFF);
+			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
+				DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3D);
+			else
+				DC_SETBIT(dc_sc, DC_10BTCTRL, 0x7F3F);
+			DC_SETBIT(dc_sc, DC_SIARESET, DC_SIA_RESET);
+			DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
+			mode &= ~DC_NETCFG_PORTSEL;
+			mode |= DC_NETCFG_SPEEDSEL;
+			if ((ife->ifm_media & IFM_GMASK) == IFM_FDX)
+				mode |= DC_NETCFG_FULLDUPLEX;
+			else
+				mode &= ~DC_NETCFG_FULLDUPLEX;
+			CSR_WRITE_4(dc_sc, DC_NETCFG, mode);
+			break;
+		default:
+			return(EINVAL);
+			break;
+		}
+		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);
+
+		if (sc->mii_flags & MIIF_DOINGAUTO) {
+			if (++sc->mii_ticks != 5)
+				return(0);
+			else {
+				sc->mii_ticks = 0;
+				sc->mii_flags &= ~MIIF_DOINGAUTO;
+				sc->mii_flags |= MIIF_AUTOTIMEOUT;
+			}
+		}
+
+		sc->mii_flags &= ~MIIF_DOINGAUTO;
+
+		/*
+		 * 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 = CSR_READ_4(dc_sc, DC_10BTSTAT) &
+		    (DC_TSTAT_LS10|DC_TSTAT_LS100);
+
+		if (IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX &&
+		    !(reg & DC_TSTAT_LS100)) {
+			if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
+				sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
+				break;
+			} else
+				return(0);
+		} else if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T &&
+		    !(reg & DC_TSTAT_LS10)) {
+			if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
+				sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
+				break;
+			} else
+				return(0);
+		} else if (IFM_SUBTYPE(mii->mii_media_active) == IFM_NONE &&
+		    (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))) {
+			if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
+				sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
+				break;
+			} else
+				return(0);
+		} else if (CSR_READ_4(dc_sc, DC_ISR) & DC_ISR_LINKGOOD) {
+			if (sc->mii_flags & MIIF_AUTOTIMEOUT) {
+				sc->mii_flags &= ~MIIF_AUTOTIMEOUT;
+				break;
+			} else
+				return(0);
+		}
+
+		sc->mii_ticks = 0;
+		/*dcphy_reset(sc);*/
+		dcphy_auto(sc, 0);
+
+		break;
+	}
+
+	/* Update the media status. */
+	dcphy_status(sc);
+
+	/* Callback if something changed. */
+	if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) {
+		MIIBUS_STATCHG(sc->mii_dev);
+		sc->mii_active = mii->mii_media_active;
+	}
+	return (0);
+}
+
+void
+dcphy_status(sc)
+	struct mii_softc *sc;
+{
+	struct mii_data *mii = sc->mii_pdata;
+	int reg, anlpar;
+	struct dc_softc		*dc_sc;
+
+	dc_sc = mii->mii_ifp->if_softc;
+
+	mii->mii_media_status = IFM_AVALID;
+	mii->mii_media_active = IFM_ETHER;
+
+	reg = CSR_READ_4(dc_sc, DC_10BTSTAT) &
+	     (DC_TSTAT_LS10|DC_TSTAT_LS100);
+
+	if (!(reg & DC_TSTAT_LS10) || !(reg & DC_TSTAT_LS100))
+		mii->mii_media_status |= IFM_ACTIVE;
+
+	if (sc->mii_flags & MIIF_DOINGAUTO) {
+		mii->mii_media_active |= IFM_NONE;
+		return;
+	}
+
+	if (CSR_READ_4(dc_sc, DC_10BTCTRL) & DC_TCTL_AUTONEGENBL &&
+	    CSR_READ_4(dc_sc, DC_10BTSTAT) & DC_TSTAT_ANEGSTAT) {
+		/* Erg, still trying, I guess... */
+		if ((CSR_READ_4(dc_sc, DC_10BTSTAT) &
+		    DC_ASTAT_AUTONEGCMP) != DC_ASTAT_AUTONEGCMP) {
+			mii->mii_media_active |= IFM_NONE;
+			return;
+		}
+
+		if (CSR_READ_4(dc_sc, DC_10BTSTAT) & DC_TSTAT_LP_CAN_NWAY) {
+			anlpar = CSR_READ_4(dc_sc, DC_10BTSTAT) >> 16;
+			if (anlpar & ANLPAR_T4)
+				mii->mii_media_active |= IFM_100_T4;
+			else if (anlpar & ANLPAR_TX_FD)
+				mii->mii_media_active |= IFM_100_TX|IFM_FDX;
+			else if (anlpar & ANLPAR_TX)
+				mii->mii_media_active |= IFM_100_TX;
+			else if (anlpar & ANLPAR_10_FD)
+				mii->mii_media_active |= IFM_10_T|IFM_FDX;
+			else if (anlpar & ANLPAR_10)
+				mii->mii_media_active |= IFM_10_T;
+			else
+				mii->mii_media_active |= IFM_NONE;
+			if (DC_IS_INTEL(dc_sc))
+				DC_CLRBIT(dc_sc, DC_10BTCTRL,
+				    DC_TCTL_AUTONEGENBL);
+			return;
+		}
+		/*
+		 * If the other side doesn't support NWAY, then the
+		 * best we can do is determine if we have a 10Mbps or
+		 * 100Mbps link. There's no way to know if the link 
+		 * is full or half duplex, so we default to half duplex
+		 * and hope that the user is clever enough to manually
+		 * change the media settings if we're wrong.
+		 */
+		if (!(reg & DC_TSTAT_LS100))
+			mii->mii_media_active |= IFM_100_TX;
+		else if (!(reg & DC_TSTAT_LS10))
+			mii->mii_media_active |= IFM_10_T;
+		else
+			mii->mii_media_active |= IFM_NONE;
+		if (DC_IS_INTEL(dc_sc))
+			DC_CLRBIT(dc_sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
+		return;
+	}
+
+	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_SCRAMBLER)
+		mii->mii_media_active |= IFM_100_TX;
+	else
+		mii->mii_media_active |= IFM_10_T;
+	if (CSR_READ_4(dc_sc, DC_NETCFG) & DC_NETCFG_FULLDUPLEX)
+		mii->mii_media_active |= IFM_FDX;
+
+	return;
+}
+
+static int
+dcphy_auto(mii, waitfor)
+	struct mii_softc	*mii;
+	int			waitfor;
+{
+	int			i;
+	struct dc_softc		*sc;
+
+	sc = mii->mii_pdata->mii_ifp->if_softc;
+
+	if ((mii->mii_flags & MIIF_DOINGAUTO) == 0) {
+		DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+		DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX);
+		DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET);
+		CSR_WRITE_4(sc, DC_10BTCTRL, 0x3FFFF);
+		DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET);
+		DC_SETBIT(sc, DC_10BTCTRL, DC_TCTL_AUTONEGENBL);
+		DC_SETBIT(sc, DC_10BTSTAT, DC_ASTAT_TXDISABLE);
+	}
+
+	if (waitfor) {
+		/* Wait 500ms for it to complete. */
+		for (i = 0; i < 500; i++) {
+			if ((CSR_READ_4(sc, DC_10BTSTAT) & DC_TSTAT_ANEGSTAT)
+			    == DC_ASTAT_AUTONEGCMP)
+				return(0);
+			DELAY(1000);
+		}
+		/*
+		 * 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;
+
+	return(EJUSTRETURN);
+}
+
+static void
+dcphy_reset(mii)
+	struct mii_softc	*mii;
+{
+	struct dc_softc		*sc;
+
+	sc = mii->mii_pdata->mii_ifp->if_softc;
+
+	DC_CLRBIT(sc, DC_SIARESET, DC_SIA_RESET);
+	DELAY(1000);
+	DC_SETBIT(sc, DC_SIARESET, DC_SIA_RESET);
+
+	return;
+}
+