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 * $DragonFly: src/sys/dev/netif/mii_layer/pnaphy.c,v 1.5 2004/09/18 19:32:59 dillon Exp $ 35 * 36 * $FreeBSD: src/sys/dev/mii/pnaphy.c,v 1.1.2.3 2002/11/08 21:53:49 semenu Exp $ 37 */ 38 39 /* 40 * driver for homePNA PHYs 41 * This is really just a stub that allows us to identify homePNA-based 42 * transceicers and display the link status. MII-based homePNA PHYs 43 * only support one media type and no autonegotiation. If we were 44 * really clever, we could tweak some of the vendor-specific registers 45 * to optimize the link. 46 */ 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/socket.h> 52 #include <sys/errno.h> 53 #include <sys/module.h> 54 #include <sys/bus.h> 55 56 #include <net/if.h> 57 #include <net/if_media.h> 58 59 #include <machine/clock.h> 60 61 #include "mii.h" 62 #include "miivar.h" 63 #include "miidevs.h" 64 65 #include "miibus_if.h" 66 67 static int pnaphy_probe (device_t); 68 static int pnaphy_attach (device_t); 69 static int pnaphy_detach (device_t); 70 71 static device_method_t pnaphy_methods[] = { 72 /* device interface */ 73 DEVMETHOD(device_probe, pnaphy_probe), 74 DEVMETHOD(device_attach, pnaphy_attach), 75 DEVMETHOD(device_detach, pnaphy_detach), 76 DEVMETHOD(device_shutdown, bus_generic_shutdown), 77 { 0, 0 } 78 }; 79 80 static devclass_t pnaphy_devclass; 81 82 static driver_t pnaphy_driver = { 83 "pnaphy", 84 pnaphy_methods, 85 sizeof(struct mii_softc) 86 }; 87 88 DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0); 89 90 int pnaphy_service (struct mii_softc *, struct mii_data *, int); 91 92 static int 93 pnaphy_probe(dev) 94 device_t dev; 95 { 96 97 struct mii_attach_args *ma; 98 99 ma = device_get_ivars(dev); 100 101 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_AMD && 102 MII_MODEL(ma->mii_id2) == MII_MODEL_AMD_79c978) { 103 device_set_desc(dev, MII_STR_AMD_79c978); 104 return(0); 105 } 106 107 return(ENXIO); 108 } 109 110 static int 111 pnaphy_attach(dev) 112 device_t dev; 113 { 114 struct mii_softc *sc; 115 struct mii_attach_args *ma; 116 struct mii_data *mii; 117 const char *sep = ""; 118 119 sc = device_get_softc(dev); 120 ma = device_get_ivars(dev); 121 mii_softc_init(sc); 122 sc->mii_dev = device_get_parent(dev); 123 mii = device_get_softc(sc->mii_dev); 124 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 125 126 sc->mii_inst = mii->mii_instance; 127 sc->mii_phy = ma->mii_phyno; 128 sc->mii_service = pnaphy_service; 129 sc->mii_pdata = mii; 130 131 mii->mii_instance++; 132 133 sc->mii_flags |= MIIF_NOISOLATE; 134 135 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 136 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 137 138 mii_phy_reset(sc); 139 140 sc->mii_capabilities = 141 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 142 device_printf(dev, " "); 143 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 144 printf("no media present"); 145 else { 146 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_homePNA, 0, sc->mii_inst), 0); 147 PRINT("HomePNA"); 148 } 149 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 150 BMCR_ISO); 151 152 printf("\n"); 153 154 #undef ADD 155 #undef PRINT 156 157 MIIBUS_MEDIAINIT(sc->mii_dev); 158 159 return(0); 160 } 161 162 static int pnaphy_detach(dev) 163 device_t dev; 164 { 165 struct mii_softc *sc; 166 struct mii_data *mii; 167 168 sc = device_get_softc(dev); 169 mii = device_get_softc(device_get_parent(dev)); 170 mii_phy_auto_stop(sc); 171 sc->mii_dev = NULL; 172 LIST_REMOVE(sc, mii_list); 173 174 return(0); 175 } 176 177 int 178 pnaphy_service(sc, mii, cmd) 179 struct mii_softc *sc; 180 struct mii_data *mii; 181 int cmd; 182 { 183 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 184 int reg; 185 186 switch (cmd) { 187 case MII_POLLSTAT: 188 /* 189 * If we're not polling our PHY instance, just return. 190 */ 191 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 192 return (0); 193 break; 194 195 case MII_MEDIACHG: 196 /* 197 * If the media indicates a different PHY instance, 198 * isolate ourselves. 199 */ 200 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 201 reg = PHY_READ(sc, MII_BMCR); 202 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 203 return (0); 204 } 205 206 /* 207 * If the interface is not up, don't do anything. 208 */ 209 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 210 break; 211 212 switch (IFM_SUBTYPE(ife->ifm_media)) { 213 case IFM_AUTO: 214 case IFM_10_T: 215 case IFM_100_TX: 216 case IFM_100_T4: 217 return (EINVAL); 218 default: 219 /* 220 * BMCR data is stored in the ifmedia entry. 221 */ 222 PHY_WRITE(sc, MII_ANAR, 223 mii_anar(ife->ifm_media)); 224 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 225 } 226 break; 227 228 case MII_TICK: 229 /* 230 * If we're not currently selected, just return. 231 */ 232 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 233 return (0); 234 235 /* 236 * Only used for autonegotiation. 237 */ 238 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 239 return (0); 240 241 /* 242 * Is the interface even up? 243 */ 244 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 245 return (0); 246 247 /* 248 * Check to see if we have link. If we do, we don't 249 * need to restart the autonegotiation process. Read 250 * the BMSR twice in case it's latched. 251 */ 252 reg = PHY_READ(sc, MII_BMSR) | 253 PHY_READ(sc, MII_BMSR); 254 if (reg & BMSR_LINK) 255 return (0); 256 257 /* 258 * Only retry autonegotiation every 5 seconds. 259 */ 260 if (++sc->mii_ticks != 5) 261 return (0); 262 263 sc->mii_ticks = 0; 264 mii_phy_reset(sc); 265 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 266 return (0); 267 break; 268 } 269 270 /* Update the media status. */ 271 ukphy_status(sc); 272 if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) 273 mii->mii_media_active = IFM_ETHER|IFM_homePNA; 274 275 /* Callback if something changed. */ 276 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 277 MIIBUS_STATCHG(sc->mii_dev); 278 sc->mii_active = mii->mii_media_active; 279 } 280 return (0); 281 } 282