1 /* 2 * Copyright (c) 2000 Berkeley Software Design, Inc. 3 * Copyright (c) 1997, 1998, 1999, 2000 4 * Bill Paul <wpaul@osd.bsdi.com>. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Bill Paul. 17 * 4. Neither the name of the author nor the names of any co-contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 31 * THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 * $FreeBSD: src/sys/dev/mii/pnaphy.c,v 1.1.2.3 2002/11/08 21:53:49 semenu Exp $ 34 */ 35 36 /* 37 * driver for homePNA PHYs 38 * This is really just a stub that allows us to identify homePNA-based 39 * transceicers and display the link status. MII-based homePNA PHYs 40 * only support one media type and no autonegotiation. If we were 41 * really clever, we could tweak some of the vendor-specific registers 42 * to optimize the link. 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/kernel.h> 48 #include <sys/socket.h> 49 #include <sys/errno.h> 50 #include <sys/module.h> 51 #include <sys/bus.h> 52 53 #include <net/if.h> 54 #include <net/if_media.h> 55 56 #include <machine/clock.h> 57 58 #include "mii.h" 59 #include "miivar.h" 60 #include "miidevs.h" 61 62 #include "miibus_if.h" 63 64 static int pnaphy_probe (device_t); 65 static int pnaphy_attach (device_t); 66 67 static device_method_t pnaphy_methods[] = { 68 /* device interface */ 69 DEVMETHOD(device_probe, pnaphy_probe), 70 DEVMETHOD(device_attach, pnaphy_attach), 71 DEVMETHOD(device_detach, ukphy_detach), 72 DEVMETHOD(device_shutdown, bus_generic_shutdown), 73 DEVMETHOD_END 74 }; 75 76 static const struct mii_phydesc pnaphys[] = { 77 MII_PHYDESC(AMD, 79c978), 78 MII_PHYDESC_NULL 79 }; 80 81 static devclass_t pnaphy_devclass; 82 83 static driver_t pnaphy_driver = { 84 "pnaphy", 85 pnaphy_methods, 86 sizeof(struct mii_softc) 87 }; 88 89 DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, NULL, NULL); 90 91 static int pnaphy_service(struct mii_softc *, struct mii_data *, int); 92 93 static int 94 pnaphy_probe(device_t dev) 95 { 96 struct mii_attach_args *ma = device_get_ivars(dev); 97 const struct mii_phydesc *mpd; 98 99 mpd = mii_phy_match(ma, pnaphys); 100 if (mpd != NULL) { 101 device_set_desc(dev, mpd->mpd_name); 102 return (0); 103 } 104 return(ENXIO); 105 } 106 107 static int 108 pnaphy_attach(device_t dev) 109 { 110 struct mii_softc *sc; 111 struct mii_attach_args *ma; 112 struct mii_data *mii; 113 114 sc = device_get_softc(dev); 115 ma = device_get_ivars(dev); 116 mii_softc_init(sc, ma); 117 sc->mii_dev = device_get_parent(dev); 118 mii = device_get_softc(sc->mii_dev); 119 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 120 121 sc->mii_inst = mii->mii_instance; 122 sc->mii_service = pnaphy_service; 123 sc->mii_pdata = mii; 124 125 mii->mii_instance++; 126 127 sc->mii_flags |= MIIF_NOISOLATE | 128 MIIF_IS_HPNA; /* force HomePNA */ 129 130 mii_phy_reset(sc); 131 132 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 133 134 device_printf(dev, " "); 135 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 136 kprintf("no media present"); 137 else 138 mii_phy_add_media(sc); 139 kprintf("\n"); 140 141 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 142 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 143 MII_MEDIA_NONE); 144 #undef ADD 145 146 MIIBUS_MEDIAINIT(sc->mii_dev); 147 return(0); 148 } 149 150 static int 151 pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 152 { 153 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 154 int reg; 155 156 switch (cmd) { 157 case MII_POLLSTAT: 158 /* 159 * If we're not polling our PHY instance, just return. 160 */ 161 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 162 return (0); 163 break; 164 165 case MII_MEDIACHG: 166 /* 167 * If the media indicates a different PHY instance, 168 * isolate ourselves. 169 */ 170 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 171 reg = PHY_READ(sc, MII_BMCR); 172 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 173 return (0); 174 } 175 176 /* 177 * If the interface is not up, don't do anything. 178 */ 179 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 180 break; 181 182 switch (IFM_SUBTYPE(ife->ifm_media)) { 183 case IFM_AUTO: 184 case IFM_10_T: 185 case IFM_100_TX: 186 case IFM_100_T4: 187 return (EINVAL); 188 default: 189 mii_phy_set_media(sc); 190 } 191 break; 192 193 case MII_TICK: 194 /* 195 * If we're not currently selected, just return. 196 */ 197 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 198 return (0); 199 200 if (mii_phy_tick(sc) == EJUSTRETURN) 201 return (0); 202 break; 203 } 204 205 /* Update the media status. */ 206 ukphy_status(sc); 207 if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) 208 mii->mii_media_active = IFM_ETHER | IFM_HPNA_1; 209 210 /* Callback if something changed. */ 211 mii_phy_update(sc, cmd); 212 return (0); 213 } 214