/*- * Copyright (c) 2010, Pyun YongHyeon * 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 unmodified, 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 AUTHOR 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 AUTHOR 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("$FreeBSD$"); /* * Driver for the RDC Semiconductor R6040 10/100 PHY. */ #include #include #include #include #include #include #include #include #include #include #include "miidevs.h" #include #include "miibus_if.h" static device_probe_t rdcphy_probe; static device_attach_t rdcphy_attach; struct rdcphy_softc { struct mii_softc mii_sc; int mii_link_tick; #define RDCPHY_MANNEG_TICK 3 }; static device_method_t rdcphy_methods[] = { /* device interface */ DEVMETHOD(device_probe, rdcphy_probe), DEVMETHOD(device_attach, rdcphy_attach), DEVMETHOD(device_detach, mii_phy_detach), DEVMETHOD(device_shutdown, bus_generic_shutdown), DEVMETHOD_END }; static devclass_t rdcphy_devclass; static driver_t rdcphy_driver = { "rdcphy", rdcphy_methods, sizeof(struct rdcphy_softc) }; DRIVER_MODULE(rdcphy, miibus, rdcphy_driver, rdcphy_devclass, 0, 0); static int rdcphy_service(struct mii_softc *, struct mii_data *, int); static void rdcphy_status(struct mii_softc *); static const struct mii_phydesc rdcphys[] = { MII_PHY_DESC(RDC, R6040), MII_PHY_END }; static const struct mii_phy_funcs rdcphy_funcs = { rdcphy_service, rdcphy_status, mii_phy_reset }; static int rdcphy_probe(device_t dev) { return (mii_phy_dev_probe(dev, rdcphys, BUS_PROBE_DEFAULT)); } static int rdcphy_attach(device_t dev) { mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &rdcphy_funcs, 1); return (0); } static int rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { struct rdcphy_softc *rsc; struct ifmedia_entry *ife; rsc = (struct rdcphy_softc *)sc; ife = mii->mii_media.ifm_cur; switch (cmd) { case MII_POLLSTAT: break; case MII_MEDIACHG: /* * If the interface is not up, don't do anything. */ if ((mii->mii_ifp->if_flags & IFF_UP) == 0) break; mii_phy_setmedia(sc); switch (IFM_SUBTYPE(ife->ifm_media)) { case IFM_100_TX: case IFM_10_T: /* * Report fake lost link event to parent * driver. This will stop MAC of parent * driver and make it possible to reconfigure * MAC after completion of link establishment. * Note, the parent MAC seems to require * restarting MAC when underlying any PHY * configuration was changed even if the * resolved speed/duplex was not changed at * all. */ mii->mii_media_status = 0; mii->mii_media_active = IFM_ETHER | IFM_NONE; rsc->mii_link_tick = RDCPHY_MANNEG_TICK; /* Immediately report link down. */ mii_phy_update(sc, MII_MEDIACHG); return (0); default: break; } break; case MII_TICK: if (mii_phy_tick(sc) == EJUSTRETURN) return (0); if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { /* * It seems the PHY hardware does not correctly * report link status changes when manual link * configuration is in progress. It is also * possible for the PHY to complete establishing * a link within one second such that mii(4) * did not notice the link change. To workaround * the issue, emulate lost link event and wait * for 3 seconds when manual link configuration * is in progress. 3 seconds would be long * enough to absorb transient link flips. */ if (rsc->mii_link_tick > 0) { rsc->mii_link_tick--; return (0); } } break; } /* Update the media status. */ PHY_STATUS(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return (0); } static void rdcphy_status(struct mii_softc *sc) { struct mii_data *mii; struct ifmedia_entry *ife; int bmsr, bmcr, physts; mii = sc->mii_pdata; ife = mii->mii_media.ifm_cur; mii->mii_media_status = IFM_AVALID; mii->mii_media_active = IFM_ETHER; bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); physts = PHY_READ(sc, MII_RDCPHY_STATUS); if ((physts & STATUS_LINK_UP) != 0) mii->mii_media_status |= IFM_ACTIVE; bmcr = PHY_READ(sc, MII_BMCR); if ((bmcr & BMCR_ISO) != 0) { mii->mii_media_active |= IFM_NONE; mii->mii_media_status = 0; return; } if ((bmcr & BMCR_LOOP) != 0) mii->mii_media_active |= IFM_LOOP; if ((bmcr & BMCR_AUTOEN) != 0) { if ((bmsr & BMSR_ACOMP) == 0) { /* Erg, still trying, I guess... */ mii->mii_media_active |= IFM_NONE; return; } } switch (physts & STATUS_SPEED_MASK) { case STATUS_SPEED_100: mii->mii_media_active |= IFM_100_TX; break; case STATUS_SPEED_10: mii->mii_media_active |= IFM_10_T; break; default: mii->mii_media_active |= IFM_NONE; return; } if ((physts & STATUS_FULL_DUPLEX) != 0) mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); else mii->mii_media_active |= IFM_HDX; }