/* $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. * * 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. */ #include __FBSDID("$FreeBSD$"); /* * 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 #include MODULE_VERSION(miibus, 1); #include "miibus_if.h" static int miibus_print_child(device_t dev, device_t child); static int miibus_child_location_str(device_t bus, device_t child, char *buf, size_t buflen); static int miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf, size_t buflen); 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, miibus_print_child), DEVMETHOD(bus_driver_added, bus_generic_driver_added), DEVMETHOD(bus_child_pnpinfo_str, miibus_child_pnpinfo_str), DEVMETHOD(bus_child_location_str, miibus_child_location_str), /* 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) }; struct miibus_ivars { ifm_change_cb_t ifmedia_upd; ifm_stat_cb_t ifmedia_sts; }; /* * Helper function used by network interface drivers, attaches PHYs * to the network interface driver parent. */ int miibus_probe(device_t dev) { struct mii_attach_args ma, *args; struct mii_data *mii; device_t child = NULL, parent; int bmsr, capmask = 0xFFFFFFFF; 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++) { /* * 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_EXTSTAT|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(device_t dev) { struct miibus_ivars *ivars; struct mii_data *mii; mii = device_get_softc(dev); /* * Note that each NIC's softc must start with an ifnet pointer. * XXX: EVIL HACK! */ mii->mii_ifp = *(struct ifnet**)device_get_softc(device_get_parent(dev)); ivars = device_get_ivars(dev); ifmedia_init(&mii->mii_media, IFM_IMASK, ivars->ifmedia_upd, ivars->ifmedia_sts); bus_generic_attach(dev); return(0); } int miibus_detach(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_print_child(device_t dev, device_t child) { struct mii_attach_args *ma; int retval; ma = device_get_ivars(child); retval = bus_print_child_header(dev, child); retval += printf(" PHY %d", ma->mii_phyno); retval += bus_print_child_footer(dev, child); return (retval); } static int miibus_child_pnpinfo_str(device_t bus, device_t child, char *buf, size_t buflen) { struct mii_attach_args *maa = device_get_ivars(child); snprintf(buf, buflen, "oui=0x%x model=0x%x rev=0x%x", MII_OUI(maa->mii_id1, maa->mii_id2), MII_MODEL(maa->mii_id2), MII_REV(maa->mii_id2)); return (0); } static int miibus_child_location_str(device_t bus, device_t child, char *buf, size_t buflen) { struct mii_attach_args *maa = device_get_ivars(child); snprintf(buf, buflen, "phyno=%d", maa->mii_phyno); return (0); } static int miibus_readreg(device_t dev, int phy, int reg) { device_t parent; parent = device_get_parent(dev); return(MIIBUS_READREG(parent, phy, reg)); } static int miibus_writereg(device_t dev, int phy, int reg, int data) { device_t parent; parent = device_get_parent(dev); return(MIIBUS_WRITEREG(parent, phy, reg, data)); } static void miibus_statchg(device_t dev) { device_t parent; struct mii_data *mii; struct ifnet *ifp; parent = device_get_parent(dev); MIIBUS_STATCHG(parent); mii = device_get_softc(dev); /* * Note that each NIC's softc must start with an ifnet pointer. * XXX: EVIL HACK! */ ifp = *(struct ifnet **)device_get_softc(parent); ifp->if_baudrate = ifmedia_baudrate(mii->mii_media_active); return; } static void miibus_linkchg(device_t dev) { struct mii_data *mii; device_t parent; int link_state; parent = device_get_parent(dev); MIIBUS_LINKCHG(parent); mii = device_get_softc(dev); if (mii->mii_media_status & IFM_AVALID) { if (mii->mii_media_status & IFM_ACTIVE) link_state = LINK_STATE_UP; else link_state = LINK_STATE_DOWN; } else link_state = LINK_STATE_UNKNOWN; /* * Note that each NIC's softc must start with an ifnet pointer. * XXX: EVIL HACK! */ if_link_state_change(*(struct ifnet**)device_get_softc(parent), link_state); } static void miibus_mediainit(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(device_t dev, device_t *child, ifm_change_cb_t ifmedia_upd, ifm_stat_cb_t ifmedia_sts) { struct miibus_ivars *ivars; int bmsr, i; ivars = malloc(sizeof(*ivars), M_DEVBUF, M_NOWAIT); if (ivars == NULL) return (ENOMEM); ivars->ifmedia_upd = ifmedia_upd; ivars->ifmedia_sts = ifmedia_sts; *child = device_add_child(dev, "miibus", -1); device_set_ivars(*child, ivars); for (i = 0; i < MII_NPHY; i++) { bmsr = MIIBUS_READREG(dev, i, MII_BMSR); if (bmsr == 0 || bmsr == 0xffff || (bmsr & (BMSR_EXTSTAT|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(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(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(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); }