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 1.4 2003/08/27 09:38:31 rob 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 sc->mii_dev = device_get_parent(dev); 122 mii = device_get_softc(sc->mii_dev); 123 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 124 125 sc->mii_inst = mii->mii_instance; 126 sc->mii_phy = ma->mii_phyno; 127 sc->mii_service = pnaphy_service; 128 sc->mii_pdata = mii; 129 130 mii->mii_instance++; 131 132 sc->mii_flags |= MIIF_NOISOLATE; 133 134 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 135 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 136 137 mii_phy_reset(sc); 138 139 sc->mii_capabilities = 140 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 141 device_printf(dev, " "); 142 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 143 printf("no media present"); 144 else { 145 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_homePNA, 0, sc->mii_inst), 0); 146 PRINT("HomePNA"); 147 } 148 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 149 BMCR_ISO); 150 151 printf("\n"); 152 153 #undef ADD 154 #undef PRINT 155 156 MIIBUS_MEDIAINIT(sc->mii_dev); 157 158 return(0); 159 } 160 161 static int pnaphy_detach(dev) 162 device_t dev; 163 { 164 struct mii_softc *sc; 165 struct mii_data *mii; 166 167 sc = device_get_softc(dev); 168 mii = device_get_softc(device_get_parent(dev)); 169 mii_phy_auto_stop(sc); 170 sc->mii_dev = NULL; 171 LIST_REMOVE(sc, mii_list); 172 173 return(0); 174 } 175 176 int 177 pnaphy_service(sc, mii, cmd) 178 struct mii_softc *sc; 179 struct mii_data *mii; 180 int cmd; 181 { 182 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 183 int reg; 184 185 switch (cmd) { 186 case MII_POLLSTAT: 187 /* 188 * If we're not polling our PHY instance, just return. 189 */ 190 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 191 return (0); 192 break; 193 194 case MII_MEDIACHG: 195 /* 196 * If the media indicates a different PHY instance, 197 * isolate ourselves. 198 */ 199 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 200 reg = PHY_READ(sc, MII_BMCR); 201 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 202 return (0); 203 } 204 205 /* 206 * If the interface is not up, don't do anything. 207 */ 208 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 209 break; 210 211 switch (IFM_SUBTYPE(ife->ifm_media)) { 212 case IFM_AUTO: 213 case IFM_10_T: 214 case IFM_100_TX: 215 case IFM_100_T4: 216 return (EINVAL); 217 default: 218 /* 219 * BMCR data is stored in the ifmedia entry. 220 */ 221 PHY_WRITE(sc, MII_ANAR, 222 mii_anar(ife->ifm_media)); 223 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 224 } 225 break; 226 227 case MII_TICK: 228 /* 229 * If we're not currently selected, just return. 230 */ 231 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 232 return (0); 233 234 /* 235 * Only used for autonegotiation. 236 */ 237 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 238 return (0); 239 240 /* 241 * Is the interface even up? 242 */ 243 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 244 return (0); 245 246 /* 247 * Check to see if we have link. If we do, we don't 248 * need to restart the autonegotiation process. Read 249 * the BMSR twice in case it's latched. 250 */ 251 reg = PHY_READ(sc, MII_BMSR) | 252 PHY_READ(sc, MII_BMSR); 253 if (reg & BMSR_LINK) 254 return (0); 255 256 /* 257 * Only retry autonegotiation every 5 seconds. 258 */ 259 if (++sc->mii_ticks != 5) 260 return (0); 261 262 sc->mii_ticks = 0; 263 mii_phy_reset(sc); 264 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 265 return (0); 266 break; 267 } 268 269 /* Update the media status. */ 270 ukphy_status(sc); 271 if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) 272 mii->mii_media_active = IFM_ETHER|IFM_homePNA; 273 274 /* Callback if something changed. */ 275 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 276 MIIBUS_STATCHG(sc->mii_dev); 277 sc->mii_active = mii->mii_media_active; 278 } 279 return (0); 280 } 281