/* $NetBSD: urlphy.c,v 1.39.4.1 2023/06/21 22:11:29 martin Exp $ */ /* * Copyright (c) 2001, 2002 * Shingo WATANABE . 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, 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. Neither the name of the author nor the names of any co-contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * 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. * */ /* * driver for Realtek RL8150L internal phy */ #include __KERNEL_RCSID(0, "$NetBSD: urlphy.c,v 1.39.4.1 2023/06/21 22:11:29 martin Exp $"); #include #include #include #include #include #include #include #include #include #include #include #ifdef URLPHY_DEBUG #define DPRINTF(x) if (urlphydebug) printf x #define DPRINTFN(n,x) if (urlphydebug>(n)) printf x int urlphydebug = URLPHY_DEBUG; #else #define DPRINTF(x) #define DPRINTFN(n,x) #endif static int urlphy_match(device_t, cfdata_t, void *); static void urlphy_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(urlphy, sizeof(struct mii_softc), urlphy_match, urlphy_attach, mii_phy_detach, mii_phy_activate); static int urlphy_service(struct mii_softc *, struct mii_data *, int); static void urlphy_status(struct mii_softc *); static const struct mii_phy_funcs urlphy_funcs = { urlphy_service, urlphy_status, mii_phy_reset, }; static int urlphy_match(device_t parent, cfdata_t match, void *aux) { struct mii_attach_args *ma = aux; /* RTL8150 reports OUI == 0, MODEL == 0 */ if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && MII_MODEL(ma->mii_id2) != 0) return 0; /* Make sure the parent is an 'url' device. */ if (!device_is_a(parent, "url")) return 0; return 10; } static void urlphy_attach(device_t parent, device_t self, void *aux) { struct mii_softc *sc = device_private(self); struct mii_attach_args *ma = aux; struct mii_data *mii = ma->mii_data; aprint_naive(": Media interface\n"); aprint_normal(": Realtek RTL8150L internal media interface\n"); DPRINTF(("%s: %s: enter\n", device_xname(self), __func__)); sc->mii_dev = self; sc->mii_inst = mii->mii_instance; sc->mii_phy = ma->mii_phyno; sc->mii_funcs = &urlphy_funcs; sc->mii_pdata = mii; sc->mii_flags = ma->mii_flags; /* Don't do loopback on this PHY. */ sc->mii_flags |= MIIF_NOLOOP; /* Don't do isolate on this PHY. */ sc->mii_flags |= MIIF_NOISOLATE; if (mii->mii_instance != 0) { aprint_error_dev(self, "ignoring this PHY, non-zero instance\n"); return; } mii_lock(mii); PHY_RESET(sc); PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); sc->mii_capabilities &= ma->mii_capmask; mii_unlock(mii); mii_phy_add_media(sc); } static int urlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) { struct ifmedia_entry *ife = mii->mii_media.ifm_cur; uint16_t reg; DPRINTF(("%s: %s: enter\n", device_xname(sc->mii_dev), __func__)); switch (cmd) { case MII_POLLSTAT: /* If we're not polling our PHY instance, just return. */ if (IFM_INST(ife->ifm_media) != sc->mii_inst) return 0; break; case MII_MEDIACHG: /* If we're not currently selected, just return. */ if (IFM_INST(ife->ifm_media) != sc->mii_inst) return 0; /* If the interface is not up, don't do anything. */ if ((mii->mii_ifp->if_flags & IFF_UP) == 0) break; mii_phy_setmedia(sc); break; case MII_TICK: /* If we're not currently selected, just return. */ if (IFM_INST(ife->ifm_media) != sc->mii_inst) return 0; /* Just bail now if the interface is down. */ if ((mii->mii_ifp->if_flags & IFF_UP) == 0) return 0; /* * If we're not doing autonegotiation, we don't need to do * any extra work here. However, we need to check the link * status so we can generate an announcement if the status * changes. */ if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) break; /* Read the status register twice; MSR_LINK is latch-low. */ PHY_READ(sc, URLPHY_MSR, ®); PHY_READ(sc, URLPHY_MSR, ®); if (reg & URLPHY_MSR_LINK) { /* * Reset autonegotiation timer to 0 in case the link * goes down in the next tick. */ sc->mii_ticks = 0; /* See above. */ break; } /* * mii_ticks == 0 means it's the first tick after changing the * media or the link became down since the last tick (see * above), so break to update the status. */ if (sc->mii_ticks++ == 0) break; /* Only retry autonegotiation every N seconds. */ KASSERT(sc->mii_anegticks != 0); if (sc->mii_ticks < sc->mii_anegticks) return 0; if (mii_phy_auto_restart(sc) == EJUSTRETURN) return 0; break; case MII_DOWN: mii_phy_down(sc); return 0; } /* Update the media status. */ mii_phy_status(sc); /* Callback if something changed. */ mii_phy_update(sc, cmd); return 0; } static void urlphy_status(struct mii_softc *sc) { struct mii_data *mii = sc->mii_pdata; struct ifmedia_entry *ife = mii->mii_media.ifm_cur; uint16_t msr, bmsr, bmcr; DPRINTF(("%s: %s: enter\n", device_xname(sc->mii_dev), __func__)); mii->mii_media_status = IFM_AVALID; mii->mii_media_active = IFM_ETHER; /* * The link status bit is not exist in the BMSR register, * so we need to read the MSR register to get link status. */ PHY_READ(sc, URLPHY_MSR, &msr); PHY_READ(sc, URLPHY_MSR, &msr); if (msr & URLPHY_MSR_LINK) mii->mii_media_status |= IFM_ACTIVE; DPRINTF(("%s: %s: link %s\n", device_xname(sc->mii_dev), __func__, mii->mii_media_status & IFM_ACTIVE ? "up" : "down")); PHY_READ(sc, MII_BMCR, &bmcr); if (bmcr & BMCR_AUTOEN) { PHY_READ(sc, MII_BMSR, &bmsr); PHY_READ(sc, MII_BMSR, &bmsr); if ((bmsr & BMSR_ACOMP) == 0) { /* Erg, still trying, I guess... */ mii->mii_media_active |= IFM_NONE; return; } if (msr & URLPHY_MSR_SPEED_100) mii->mii_media_active |= IFM_100_TX; else mii->mii_media_active |= IFM_10_T; if (msr & URLPHY_MSR_DUPLEX) mii->mii_media_active |= IFM_FDX; else mii->mii_media_active |= IFM_HDX; } else mii->mii_media_active = ife->ifm_media; }