fb58dc87ca
loopback to work PCnet chips additionally need to be placed into
external loopback mode which pcn(4) doesn't do so far.
- In nsphy_service() just use if_dname instead of determining the name
of the parent NIC via device_get_name(device_get_parent(sc->mii_dev)).
- Don't set MIIF_NOISOLATE, except for when used in combination with a
NIC that wedges when isolating the PHYs, so nsphy(4) can be used in
configurations with multiple PHYs.
- Use mii_phy_add_media() instead of mii_add_media() so the latter can
be eventually retired.
- Take advantage of mii_phy_setmedia() (requires the MIIF_FORCEANEG
added in sys/dev/mii/mii_physubr.c 1.26, sys/dev/mii/miivar.h 1.19).
- Implement a separate nsphy_reset(). There are two reasons for this:
1) This PHY can take an inordinate amount of time to reset if media
is attached; under fairly normal circumstances up to nearly one
second. This is because it appears to go through an implicit auto-
negotiation cycle as part of the reset.
2) During reset and auto-negotiation, the BMCR will clear the reset
bit before the process is complete. It will return 0 until the
process is complete and it's safe to access the PHY again.
This is the first of two changes required to make the combination of
Am79c971 and DP83840A found on certain HP cards and on-board in IBM
machines work.
- Fix some whitespace nits.
Based on: NetBSD (except for the first and second item)
MFC after: 2 weeks
411 lines
12 KiB
C
411 lines
12 KiB
C
/* $NetBSD: nsphy.c,v 1.18 1999/07/14 23:57:36 thorpej Exp $ */
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/*-
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* Copyright (c) 1998, 1999 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
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* NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1997 Manuel Bouyer. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Manuel Bouyer.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* driver for National Semiconductor's DP83840A ethernet 10/100 PHY
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* Data Sheet available from www.national.com
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/socket.h>
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#include <sys/errno.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <net/if.h>
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#include <net/if_media.h>
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#include <dev/mii/mii.h>
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#include <dev/mii/miivar.h>
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#include "miidevs.h"
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#include <dev/mii/nsphyreg.h>
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#include "miibus_if.h"
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static int nsphy_probe(device_t);
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static int nsphy_attach(device_t);
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static device_method_t nsphy_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, nsphy_probe),
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DEVMETHOD(device_attach, nsphy_attach),
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DEVMETHOD(device_detach, mii_phy_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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{ 0, 0 }
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};
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static devclass_t nsphy_devclass;
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static driver_t nsphy_driver = {
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"nsphy",
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nsphy_methods,
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sizeof(struct mii_softc)
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};
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DRIVER_MODULE(nsphy, miibus, nsphy_driver, nsphy_devclass, 0, 0);
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static int nsphy_service(struct mii_softc *, struct mii_data *, int);
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static void nsphy_status(struct mii_softc *);
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static void nsphy_reset(struct mii_softc *);
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static int
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nsphy_probe(device_t dev)
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{
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struct mii_attach_args *ma;
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ma = device_get_ivars(dev);
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if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_NATSEMI &&
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MII_MODEL(ma->mii_id2) == MII_MODEL_NATSEMI_DP83840) {
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device_set_desc(dev, MII_STR_NATSEMI_DP83840);
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} else
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return (ENXIO);
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return (BUS_PROBE_DEFAULT);
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}
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static int
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nsphy_attach(device_t dev)
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{
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struct mii_softc *sc;
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struct mii_attach_args *ma;
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struct mii_data *mii;
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const char *nic;
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sc = device_get_softc(dev);
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ma = device_get_ivars(dev);
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sc->mii_dev = device_get_parent(dev);
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mii = device_get_softc(sc->mii_dev);
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LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list);
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sc->mii_inst = mii->mii_instance;
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sc->mii_phy = ma->mii_phyno;
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sc->mii_service = nsphy_service;
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sc->mii_pdata = mii;
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mii->mii_instance++;
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nic = device_get_name(device_get_parent(sc->mii_dev));
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/*
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* Am79C971 and i82557 wedge when isolating all of their
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* (external) PHYs.
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*/
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if (strcmp(nic, "fxp") == 0 || strcmp(nic, "pcn") == 0)
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sc->mii_flags |= MIIF_NOISOLATE;
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/*
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* DP83840A used with HME chips don't advertise their media
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* capabilities themselves properly so force writing the ANAR
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* according to the BMSR in mii_phy_setmedia().
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*/
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if (strcmp(nic, "hme") == 0)
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sc->mii_flags |= MIIF_FORCEANEG;
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#define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL)
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/*
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* In order for MII loopback to work Am79C971 and greater PCnet
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* chips additionally need to be placed into external loopback
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* mode which pcn(4) doesn't do so far.
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*/
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if (strcmp(nic, "pcn") != 0)
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#if 1
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ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP,
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sc->mii_inst), BMCR_LOOP|BMCR_S100);
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#else
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if (strcmp(nic, "pcn") == 0)
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sc->mii_flags |= MIIF_NOLOOP;
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#endif
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nsphy_reset(sc);
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sc->mii_capabilities =
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PHY_READ(sc, MII_BMSR) & ma->mii_capmask;
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device_printf(dev, " ");
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mii_phy_add_media(sc);
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printf("\n");
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#undef ADD
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MIIBUS_MEDIAINIT(sc->mii_dev);
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return (0);
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}
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static int
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nsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd)
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{
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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int reg;
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switch (cmd) {
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case MII_POLLSTAT:
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/*
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* If we're not polling our PHY instance, just return.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst)
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return (0);
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break;
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case MII_MEDIACHG:
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/*
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* If the media indicates a different PHY instance,
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* isolate ourselves.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst) {
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reg = PHY_READ(sc, MII_BMCR);
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PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
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return (0);
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}
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/*
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* If the interface is not up, don't do anything.
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*/
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if ((mii->mii_ifp->if_flags & IFF_UP) == 0)
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break;
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reg = PHY_READ(sc, MII_NSPHY_PCR);
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/*
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* Set up the PCR to use LED4 to indicate full-duplex
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* in both 10baseT and 100baseTX modes.
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*/
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reg |= PCR_LED4MODE;
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/*
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* Make sure Carrier Integrity Monitor function is
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* disabled (normal for Node operation, but sometimes
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* it's not set?!)
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*/
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reg |= PCR_CIMDIS;
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/*
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* Make sure "force link good" is set to normal mode.
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* It's only intended for debugging.
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*/
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reg |= PCR_FLINK100;
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/*
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* Mystery bits which are supposedly `reserved',
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* but we seem to need to set them when the PHY
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* is connected to some interfaces:
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*
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* 0x0400 is needed for fxp
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* (Intel EtherExpress Pro 10+/100B, 82557 chip)
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* (nsphy with a DP83840 chip)
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* 0x0100 may be needed for some other card
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*/
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reg |= 0x0100 | 0x0400;
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if (strcmp(mii->mii_ifp->if_dname, "fxp") == 0)
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PHY_WRITE(sc, MII_NSPHY_PCR, reg);
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mii_phy_setmedia(sc);
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break;
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case MII_TICK:
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/*
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* If we're not currently selected, just return.
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*/
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if (IFM_INST(ife->ifm_media) != sc->mii_inst)
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return (0);
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if (mii_phy_tick(sc) == EJUSTRETURN)
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return (0);
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break;
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}
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/* Update the media status. */
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nsphy_status(sc);
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/* Callback if something changed. */
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mii_phy_update(sc, cmd);
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return (0);
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}
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static void
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nsphy_status(struct mii_softc *sc)
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{
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struct mii_data *mii = sc->mii_pdata;
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struct ifmedia_entry *ife = mii->mii_media.ifm_cur;
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int bmsr, bmcr, par, anlpar;
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mii->mii_media_status = IFM_AVALID;
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mii->mii_media_active = IFM_ETHER;
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bmsr = PHY_READ(sc, MII_BMSR) |
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PHY_READ(sc, MII_BMSR);
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if (bmsr & BMSR_LINK)
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mii->mii_media_status |= IFM_ACTIVE;
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bmcr = PHY_READ(sc, MII_BMCR);
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if (bmcr & BMCR_ISO) {
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mii->mii_media_active |= IFM_NONE;
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mii->mii_media_status = 0;
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return;
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}
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if (bmcr & BMCR_LOOP)
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mii->mii_media_active |= IFM_LOOP;
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if (bmcr & BMCR_AUTOEN) {
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/*
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* The PAR status bits are only valid of autonegotiation
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* has completed (or it's disabled).
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*/
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if ((bmsr & BMSR_ACOMP) == 0) {
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/* Erg, still trying, I guess... */
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mii->mii_media_active |= IFM_NONE;
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return;
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}
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/*
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* Argh. The PAR doesn't seem to indicate duplex mode
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* properly! Determine media based on link partner's
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* advertised capabilities.
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*/
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if (PHY_READ(sc, MII_ANER) & ANER_LPAN) {
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anlpar = PHY_READ(sc, MII_ANAR) &
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PHY_READ(sc, MII_ANLPAR);
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if (anlpar & ANLPAR_T4)
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mii->mii_media_active |= IFM_100_T4;
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else if (anlpar & ANLPAR_TX_FD)
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mii->mii_media_active |= IFM_100_TX|IFM_FDX;
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else if (anlpar & ANLPAR_TX)
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mii->mii_media_active |= IFM_100_TX;
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else if (anlpar & ANLPAR_10_FD)
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mii->mii_media_active |= IFM_10_T|IFM_FDX;
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else if (anlpar & ANLPAR_10)
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mii->mii_media_active |= IFM_10_T;
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else
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mii->mii_media_active |= IFM_NONE;
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return;
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}
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/*
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* Link partner is not capable of autonegotiation.
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* We will never be in full-duplex mode if this is
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* the case, so reading the PAR is OK.
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*/
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par = PHY_READ(sc, MII_NSPHY_PAR);
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if (par & PAR_10)
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mii->mii_media_active |= IFM_10_T;
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else
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mii->mii_media_active |= IFM_100_TX;
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#if 0
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if (par & PAR_FDX)
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mii->mii_media_active |= IFM_FDX;
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#endif
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} else
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mii->mii_media_active = ife->ifm_media;
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}
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static void
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nsphy_reset(struct mii_softc *sc)
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{
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struct ifmedia_entry *ife = sc->mii_pdata->mii_media.ifm_cur;
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int reg, i;
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if (sc->mii_flags & MIIF_NOISOLATE)
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reg = BMCR_RESET;
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else
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reg = BMCR_RESET | BMCR_ISO;
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PHY_WRITE(sc, MII_BMCR, reg);
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/*
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* Give it a little time to settle in case we just got power.
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* The DP83840A data sheet suggests that a soft reset should not
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* happen within 500us of power being applied. Be conservative.
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*/
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DELAY(1000);
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/*
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* Wait another 2s for it to complete.
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* This is only a little overkill as under normal circumstances
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* the PHY can take up to 1s to complete reset.
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* This is also a bit odd because after a reset, the BMCR will
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* clear the reset bit and simply reports 0 even though the reset
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* is not yet complete.
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*/
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for (i = 0; i < 1000; i++) {
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reg = PHY_READ(sc, MII_BMCR);
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if (reg != 0 && (reg & BMCR_RESET) == 0)
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break;
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DELAY(2000);
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}
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if ((sc->mii_flags & MIIF_NOISOLATE) == 0) {
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if ((ife == NULL && sc->mii_inst != 0) ||
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(ife != NULL && IFM_INST(ife->ifm_media) != sc->mii_inst))
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PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO);
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}
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}
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