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79a79ad9b8
with an ifnet structure (so device_get_softc will get one). If memory allocation fails in mii_phy_probe, don't just march ahead into a panic- return ENOMEM. MFC after: 1 week
366 lines
8.7 KiB
C
366 lines
8.7 KiB
C
/* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */
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/*-
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* Copyright (c) 1998 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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* MII bus layer, glues MII-capable network interface drivers to sharable
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* PHY drivers. This exports an interface compatible with BSD/OS 3.0's,
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* plus some NetBSD extensions.
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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/socket.h>
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#include <sys/malloc.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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MODULE_VERSION(miibus, 1);
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#include "miibus_if.h"
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#if !defined(lint)
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static const char rcsid[] =
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"$FreeBSD$";
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#endif
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static int miibus_readreg __P((device_t, int, int));
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static int miibus_writereg __P((device_t, int, int, int));
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static void miibus_statchg __P((device_t));
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static void miibus_linkchg __P((device_t));
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static void miibus_mediainit __P((device_t));
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static device_method_t miibus_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, miibus_probe),
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DEVMETHOD(device_attach, miibus_attach),
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DEVMETHOD(device_detach, miibus_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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/* bus interface */
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DEVMETHOD(bus_print_child, bus_generic_print_child),
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DEVMETHOD(bus_driver_added, bus_generic_driver_added),
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/* MII interface */
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DEVMETHOD(miibus_readreg, miibus_readreg),
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DEVMETHOD(miibus_writereg, miibus_writereg),
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DEVMETHOD(miibus_statchg, miibus_statchg),
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DEVMETHOD(miibus_linkchg, miibus_linkchg),
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DEVMETHOD(miibus_mediainit, miibus_mediainit),
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{ 0, 0 }
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};
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devclass_t miibus_devclass;
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driver_t miibus_driver = {
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"miibus",
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miibus_methods,
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sizeof(struct mii_data)
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};
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/*
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* Helper function used by network interface drivers, attaches PHYs
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* to the network interface driver parent.
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*/
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int miibus_probe(dev)
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device_t dev;
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{
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struct mii_attach_args ma, *args;
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struct mii_data *mii;
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device_t child = NULL, parent;
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int bmsr, capmask = 0xFFFFFFFF;
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mii = device_get_softc(dev);
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parent = device_get_parent(dev);
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LIST_INIT(&mii->mii_phys);
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for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) {
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/*
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* Check to see if there is a PHY at this address. Note,
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* many braindead PHYs report 0/0 in their ID registers,
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* so we test for media in the BMSR.
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*/
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bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR);
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if (bmsr == 0 || bmsr == 0xffff ||
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(bmsr & BMSR_MEDIAMASK) == 0) {
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/* Assume no PHY at this address. */
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continue;
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}
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/*
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* Extract the IDs. Braindead PHYs will be handled by
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* the `ukphy' driver, as we have no ID information to
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* match on.
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*/
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ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno,
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MII_PHYIDR1);
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ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno,
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MII_PHYIDR2);
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ma.mii_data = mii;
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ma.mii_capmask = capmask;
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args = malloc(sizeof(struct mii_attach_args),
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M_DEVBUF, M_NOWAIT);
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bcopy((char *)&ma, (char *)args, sizeof(ma));
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child = device_add_child(dev, NULL, -1);
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device_set_ivars(child, args);
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}
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if (child == NULL)
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return(ENXIO);
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device_set_desc(dev, "MII bus");
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return(0);
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}
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int miibus_attach(dev)
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device_t dev;
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{
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void **v;
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ifm_change_cb_t ifmedia_upd;
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ifm_stat_cb_t ifmedia_sts;
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struct mii_data *mii;
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mii = device_get_softc(dev);
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/*
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* Note that each NIC's softc must start with an ifnet structure.
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*/
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mii->mii_ifp = device_get_softc(device_get_parent(dev));
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v = device_get_ivars(dev);
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ifmedia_upd = v[0];
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ifmedia_sts = v[1];
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ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts);
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bus_generic_attach(dev);
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return(0);
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}
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int miibus_detach(dev)
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device_t dev;
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{
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struct mii_data *mii;
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bus_generic_detach(dev);
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mii = device_get_softc(dev);
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ifmedia_removeall(&mii->mii_media);
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mii->mii_ifp = NULL;
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return(0);
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}
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static int miibus_readreg(dev, phy, reg)
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device_t dev;
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int phy, reg;
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{
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device_t parent;
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parent = device_get_parent(dev);
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return(MIIBUS_READREG(parent, phy, reg));
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}
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static int miibus_writereg(dev, phy, reg, data)
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device_t dev;
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int phy, reg, data;
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{
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device_t parent;
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parent = device_get_parent(dev);
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return(MIIBUS_WRITEREG(parent, phy, reg, data));
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}
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static void miibus_statchg(dev)
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device_t dev;
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{
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device_t parent;
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parent = device_get_parent(dev);
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MIIBUS_STATCHG(parent);
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return;
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}
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static void
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miibus_linkchg(dev)
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device_t dev;
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{
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struct mii_data *mii;
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struct ifnet *ifp;
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device_t parent;
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int link;
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parent = device_get_parent(dev);
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MIIBUS_LINKCHG(parent);
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mii = device_get_softc(dev);
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/*
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* Note that each NIC's softc must start with an ifnet structure.
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*/
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ifp = device_get_softc(parent);
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if (mii->mii_media_status & IFM_AVALID) {
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if (mii->mii_media_status & IFM_ACTIVE)
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link = NOTE_LINKUP;
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else
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link = NOTE_LINKDOWN;
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} else {
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link = NOTE_LINKINV;
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}
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KNOTE(&ifp->if_klist, link);
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}
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static void miibus_mediainit(dev)
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device_t dev;
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{
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struct mii_data *mii;
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struct ifmedia_entry *m;
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int media = 0;
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/* Poke the parent in case it has any media of its own to add. */
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MIIBUS_MEDIAINIT(device_get_parent(dev));
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mii = device_get_softc(dev);
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LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) {
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media = m->ifm_media;
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if (media == (IFM_ETHER|IFM_AUTO))
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break;
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}
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ifmedia_set(&mii->mii_media, media);
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return;
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}
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int mii_phy_probe(dev, child, ifmedia_upd, ifmedia_sts)
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device_t dev;
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device_t *child;
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ifm_change_cb_t ifmedia_upd;
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ifm_stat_cb_t ifmedia_sts;
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{
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void **v;
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int bmsr, i;
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v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT);
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if (v == 0) {
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return (ENOMEM);
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}
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v[0] = ifmedia_upd;
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v[1] = ifmedia_sts;
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*child = device_add_child(dev, "miibus", -1);
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device_set_ivars(*child, v);
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for (i = 0; i < MII_NPHY; i++) {
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bmsr = MIIBUS_READREG(dev, i, MII_BMSR);
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if (bmsr == 0 || bmsr == 0xffff ||
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(bmsr & BMSR_MEDIAMASK) == 0) {
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/* Assume no PHY at this address. */
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continue;
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} else
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break;
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}
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if (i == MII_NPHY) {
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device_delete_child(dev, *child);
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*child = NULL;
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return(ENXIO);
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}
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bus_generic_attach(dev);
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return(0);
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}
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/*
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* Media changed; notify all PHYs.
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*/
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int
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mii_mediachg(mii)
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struct mii_data *mii;
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{
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struct mii_softc *child;
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int rv;
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mii->mii_media_status = 0;
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mii->mii_media_active = IFM_NONE;
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LIST_FOREACH(child, &mii->mii_phys, mii_list) {
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rv = (*child->mii_service)(child, mii, MII_MEDIACHG);
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if (rv)
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return (rv);
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}
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return (0);
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}
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/*
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* Call the PHY tick routines, used during autonegotiation.
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*/
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void
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mii_tick(mii)
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struct mii_data *mii;
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{
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struct mii_softc *child;
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LIST_FOREACH(child, &mii->mii_phys, mii_list)
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(void) (*child->mii_service)(child, mii, MII_TICK);
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}
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/*
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* Get media status from PHYs.
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*/
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void
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mii_pollstat(mii)
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struct mii_data *mii;
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{
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struct mii_softc *child;
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mii->mii_media_status = 0;
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mii->mii_media_active = IFM_NONE;
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LIST_FOREACH(child, &mii->mii_phys, mii_list)
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(void) (*child->mii_service)(child, mii, MII_POLLSTAT);
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}
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