/* $NetBSD: mii.c,v 1.12 1999/08/03 19:41:49 drochner Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * 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 the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * MII bus layer, glues MII-capable network interface drivers to sharable * PHY drivers. This exports an interface compatible with BSD/OS 3.0's, * plus some NetBSD extensions. */ #include #include #include #include #include #include #include #include #include #include MODULE_VERSION(miibus, 1); #include "miibus_if.h" #if !defined(lint) static const char rcsid[] = "$FreeBSD: head/sys/dev/mii/mii.c 101492 2002-08-07 22:18:33Z ambrisko $"; #endif static int miibus_readreg (device_t, int, int); static int miibus_writereg (device_t, int, int, int); static void miibus_statchg (device_t); static void miibus_linkchg (device_t); static void miibus_mediainit (device_t); static device_method_t miibus_methods[] = { /* device interface */ DEVMETHOD(device_probe, miibus_probe), DEVMETHOD(device_attach, miibus_attach), DEVMETHOD(device_detach, miibus_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), /* bus interface */ DEVMETHOD(bus_print_child, bus_generic_print_child), DEVMETHOD(bus_driver_added, bus_generic_driver_added), /* MII interface */ DEVMETHOD(miibus_readreg, miibus_readreg), DEVMETHOD(miibus_writereg, miibus_writereg), DEVMETHOD(miibus_statchg, miibus_statchg), DEVMETHOD(miibus_linkchg, miibus_linkchg), DEVMETHOD(miibus_mediainit, miibus_mediainit), { 0, 0 } }; devclass_t miibus_devclass; driver_t miibus_driver = { "miibus", miibus_methods, sizeof(struct mii_data) }; /* * Helper function used by network interface drivers, attaches PHYs * to the network interface driver parent. */ int miibus_probe(dev) device_t dev; { struct mii_attach_args ma, *args; struct mii_data *mii; device_t child = NULL, parent, *children; int bmsr, capmask = 0xFFFFFFFF, nchildren; mii = device_get_softc(dev); parent = device_get_parent(dev); LIST_INIT(&mii->mii_phys); for (ma.mii_phyno = 0; ma.mii_phyno < MII_NPHY; ma.mii_phyno++) { device_get_children(dev, &children, &nchildren); if (nchildren) break; /* * Check to see if there is a PHY at this address. Note, * many braindead PHYs report 0/0 in their ID registers, * so we test for media in the BMSR. */ bmsr = MIIBUS_READREG(parent, ma.mii_phyno, MII_BMSR); if (bmsr == 0 || bmsr == 0xffff || (bmsr & BMSR_MEDIAMASK) == 0) { /* Assume no PHY at this address. */ continue; } /* * Extract the IDs. Braindead PHYs will be handled by * the `ukphy' driver, as we have no ID information to * match on. */ ma.mii_id1 = MIIBUS_READREG(parent, ma.mii_phyno, MII_PHYIDR1); ma.mii_id2 = MIIBUS_READREG(parent, ma.mii_phyno, MII_PHYIDR2); ma.mii_data = mii; ma.mii_capmask = capmask; args = malloc(sizeof(struct mii_attach_args), M_DEVBUF, M_NOWAIT); bcopy((char *)&ma, (char *)args, sizeof(ma)); child = device_add_child(dev, NULL, -1); device_set_ivars(child, args); } if (child == NULL) return(ENXIO); device_set_desc(dev, "MII bus"); return(0); } int miibus_attach(dev) device_t dev; { void **v; ifm_change_cb_t ifmedia_upd; ifm_stat_cb_t ifmedia_sts; struct mii_data *mii; mii = device_get_softc(dev); /* * Note that each NIC's softc must start with an ifnet structure. */ mii->mii_ifp = device_get_softc(device_get_parent(dev)); v = device_get_ivars(dev); ifmedia_upd = v[0]; ifmedia_sts = v[1]; ifmedia_init(&mii->mii_media, IFM_IMASK, ifmedia_upd, ifmedia_sts); bus_generic_attach(dev); return(0); } int miibus_detach(dev) device_t dev; { struct mii_data *mii; bus_generic_detach(dev); mii = device_get_softc(dev); ifmedia_removeall(&mii->mii_media); mii->mii_ifp = NULL; return(0); } static int miibus_readreg(dev, phy, reg) device_t dev; int phy, reg; { device_t parent; parent = device_get_parent(dev); return(MIIBUS_READREG(parent, phy, reg)); } static int miibus_writereg(dev, phy, reg, data) device_t dev; int phy, reg, data; { device_t parent; parent = device_get_parent(dev); return(MIIBUS_WRITEREG(parent, phy, reg, data)); } static void miibus_statchg(dev) device_t dev; { device_t parent; parent = device_get_parent(dev); MIIBUS_STATCHG(parent); return; } static void miibus_linkchg(dev) device_t dev; { struct mii_data *mii; struct ifnet *ifp; device_t parent; int link; parent = device_get_parent(dev); MIIBUS_LINKCHG(parent); mii = device_get_softc(dev); /* * Note that each NIC's softc must start with an ifnet structure. */ ifp = device_get_softc(parent); if (mii->mii_media_status & IFM_AVALID) { if (mii->mii_media_status & IFM_ACTIVE) link = NOTE_LINKUP; else link = NOTE_LINKDOWN; } else { link = NOTE_LINKINV; } KNOTE(&ifp->if_klist, link); } static void miibus_mediainit(dev) device_t dev; { struct mii_data *mii; struct ifmedia_entry *m; int media = 0; /* Poke the parent in case it has any media of its own to add. */ MIIBUS_MEDIAINIT(device_get_parent(dev)); mii = device_get_softc(dev); LIST_FOREACH(m, &mii->mii_media.ifm_list, ifm_list) { media = m->ifm_media; if (media == (IFM_ETHER|IFM_AUTO)) break; } ifmedia_set(&mii->mii_media, media); return; } int mii_phy_probe(dev, child, ifmedia_upd, ifmedia_sts) device_t dev; device_t *child; ifm_change_cb_t ifmedia_upd; ifm_stat_cb_t ifmedia_sts; { void **v; int bmsr, i; v = malloc(sizeof(vm_offset_t) * 2, M_DEVBUF, M_NOWAIT); if (v == 0) { return (ENOMEM); } v[0] = ifmedia_upd; v[1] = ifmedia_sts; *child = device_add_child(dev, "miibus", -1); device_set_ivars(*child, v); for (i = 0; i < MII_NPHY; i++) { bmsr = MIIBUS_READREG(dev, i, MII_BMSR); if (bmsr == 0 || bmsr == 0xffff || (bmsr & BMSR_MEDIAMASK) == 0) { /* Assume no PHY at this address. */ continue; } else break; } if (i == MII_NPHY) { device_delete_child(dev, *child); *child = NULL; return(ENXIO); } bus_generic_attach(dev); return(0); } /* * Media changed; notify all PHYs. */ int mii_mediachg(mii) struct mii_data *mii; { struct mii_softc *child; int rv; mii->mii_media_status = 0; mii->mii_media_active = IFM_NONE; LIST_FOREACH(child, &mii->mii_phys, mii_list) { rv = (*child->mii_service)(child, mii, MII_MEDIACHG); if (rv) return (rv); } return (0); } /* * Call the PHY tick routines, used during autonegotiation. */ void mii_tick(mii) struct mii_data *mii; { struct mii_softc *child; LIST_FOREACH(child, &mii->mii_phys, mii_list) (void) (*child->mii_service)(child, mii, MII_TICK); } /* * Get media status from PHYs. */ void mii_pollstat(mii) struct mii_data *mii; { struct mii_softc *child; mii->mii_media_status = 0; mii->mii_media_active = IFM_NONE; LIST_FOREACH(child, &mii->mii_phys, mii_list) (void) (*child->mii_service)(child, mii, MII_POLLSTAT); } /* * Inform the PHYs that the interface is down. */ void mii_down(struct mii_data *mii) { struct mii_softc *child; LIST_FOREACH(child, &mii->mii_phys, mii_list) mii_phy_down(child); }