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 1.7 2005/02/21 18:40:36 joerg Exp $ 35 */ 36 37 /* 38 * driver for homePNA PHYs 39 * This is really just a stub that allows us to identify homePNA-based 40 * transceicers and display the link status. MII-based homePNA PHYs 41 * only support one media type and no autonegotiation. If we were 42 * really clever, we could tweak some of the vendor-specific registers 43 * to optimize the link. 44 */ 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/socket.h> 50 #include <sys/errno.h> 51 #include <sys/module.h> 52 #include <sys/bus.h> 53 54 #include <net/if.h> 55 #include <net/if_media.h> 56 57 #include <machine/clock.h> 58 59 #include "mii.h" 60 #include "miivar.h" 61 #include "miidevs.h" 62 63 #include "miibus_if.h" 64 65 static int pnaphy_probe (device_t); 66 static int pnaphy_attach (device_t); 67 static int pnaphy_detach (device_t); 68 69 static device_method_t pnaphy_methods[] = { 70 /* device interface */ 71 DEVMETHOD(device_probe, pnaphy_probe), 72 DEVMETHOD(device_attach, pnaphy_attach), 73 DEVMETHOD(device_detach, pnaphy_detach), 74 DEVMETHOD(device_shutdown, bus_generic_shutdown), 75 { 0, 0 } 76 }; 77 78 static devclass_t pnaphy_devclass; 79 80 static driver_t pnaphy_driver = { 81 "pnaphy", 82 pnaphy_methods, 83 sizeof(struct mii_softc) 84 }; 85 86 DRIVER_MODULE(pnaphy, miibus, pnaphy_driver, pnaphy_devclass, 0, 0); 87 88 int pnaphy_service (struct mii_softc *, struct mii_data *, int); 89 90 static int 91 pnaphy_probe(dev) 92 device_t dev; 93 { 94 95 struct mii_attach_args *ma; 96 97 ma = device_get_ivars(dev); 98 99 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_AMD && 100 MII_MODEL(ma->mii_id2) == MII_MODEL_AMD_79c978) { 101 device_set_desc(dev, MII_STR_AMD_79c978); 102 return(0); 103 } 104 105 return(ENXIO); 106 } 107 108 static int 109 pnaphy_attach(dev) 110 device_t dev; 111 { 112 struct mii_softc *sc; 113 struct mii_attach_args *ma; 114 struct mii_data *mii; 115 const char *sep = ""; 116 117 sc = device_get_softc(dev); 118 ma = device_get_ivars(dev); 119 mii_softc_init(sc); 120 sc->mii_dev = device_get_parent(dev); 121 mii = device_get_softc(sc->mii_dev); 122 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 123 124 sc->mii_inst = mii->mii_instance; 125 sc->mii_phy = ma->mii_phyno; 126 sc->mii_service = pnaphy_service; 127 sc->mii_pdata = mii; 128 129 mii->mii_instance++; 130 131 sc->mii_flags |= MIIF_NOISOLATE; 132 133 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 134 #define PRINT(s) printf("%s%s", sep, s); sep = ", " 135 136 mii_phy_reset(sc); 137 138 sc->mii_capabilities = 139 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 140 device_printf(dev, " "); 141 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 142 printf("no media present"); 143 else { 144 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_HPNA_1, 0, sc->mii_inst), 0); 145 PRINT("HomePNA"); 146 } 147 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 148 BMCR_ISO); 149 150 printf("\n"); 151 152 #undef ADD 153 #undef PRINT 154 155 MIIBUS_MEDIAINIT(sc->mii_dev); 156 157 return(0); 158 } 159 160 static int pnaphy_detach(dev) 161 device_t dev; 162 { 163 struct mii_softc *sc; 164 struct mii_data *mii; 165 166 sc = device_get_softc(dev); 167 mii = device_get_softc(device_get_parent(dev)); 168 mii_phy_auto_stop(sc); 169 sc->mii_dev = NULL; 170 LIST_REMOVE(sc, mii_list); 171 172 return(0); 173 } 174 175 int 176 pnaphy_service(sc, mii, cmd) 177 struct mii_softc *sc; 178 struct mii_data *mii; 179 int cmd; 180 { 181 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 182 int reg; 183 184 switch (cmd) { 185 case MII_POLLSTAT: 186 /* 187 * If we're not polling our PHY instance, just return. 188 */ 189 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 190 return (0); 191 break; 192 193 case MII_MEDIACHG: 194 /* 195 * If the media indicates a different PHY instance, 196 * isolate ourselves. 197 */ 198 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 199 reg = PHY_READ(sc, MII_BMCR); 200 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 201 return (0); 202 } 203 204 /* 205 * If the interface is not up, don't do anything. 206 */ 207 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 208 break; 209 210 switch (IFM_SUBTYPE(ife->ifm_media)) { 211 case IFM_AUTO: 212 case IFM_10_T: 213 case IFM_100_TX: 214 case IFM_100_T4: 215 return (EINVAL); 216 default: 217 /* 218 * BMCR data is stored in the ifmedia entry. 219 */ 220 PHY_WRITE(sc, MII_ANAR, 221 mii_anar(ife->ifm_media)); 222 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 223 } 224 break; 225 226 case MII_TICK: 227 /* 228 * If we're not currently selected, just return. 229 */ 230 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 231 return (0); 232 233 /* 234 * Only used for autonegotiation. 235 */ 236 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 237 return (0); 238 239 /* 240 * Is the interface even up? 241 */ 242 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 243 return (0); 244 245 /* 246 * Check to see if we have link. If we do, we don't 247 * need to restart the autonegotiation process. Read 248 * the BMSR twice in case it's latched. 249 */ 250 reg = PHY_READ(sc, MII_BMSR) | 251 PHY_READ(sc, MII_BMSR); 252 if (reg & BMSR_LINK) 253 return (0); 254 255 /* 256 * Only retry autonegotiation every 5 seconds. 257 */ 258 if (++sc->mii_ticks != 5) 259 return (0); 260 261 sc->mii_ticks = 0; 262 mii_phy_reset(sc); 263 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 264 return (0); 265 break; 266 } 267 268 /* Update the media status. */ 269 ukphy_status(sc); 270 if (IFM_SUBTYPE(mii->mii_media_active) == IFM_10_T) 271 mii->mii_media_active = IFM_ETHER | IFM_HPNA_1; 272 273 /* Callback if something changed. */ 274 if (sc->mii_active != mii->mii_media_active || cmd == MII_MEDIACHG) { 275 MIIBUS_STATCHG(sc->mii_dev); 276 sc->mii_active = mii->mii_media_active; 277 } 278 return (0); 279 } 280