1 /* 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ee.columbia.edu>. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Bill Paul. 16 * 4. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 30 * THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * driver for AMD AM79c873 PHYs 35 * This driver also works for the Davicom DM9101 PHY, which appears to 36 * be an AM79c873 workalike. 37 */ 38 39 #include <sys/cdefs.h> 40 __FBSDID("$FreeBSD$"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/socket.h> 46 #include <sys/bus.h> 47 48 #include <net/if.h> 49 #include <net/if_media.h> 50 51 #include <dev/mii/mii.h> 52 #include <dev/mii/miivar.h> 53 #include "miidevs.h" 54 55 #include <dev/mii/amphyreg.h> 56 57 #include "miibus_if.h" 58 59 static int amphy_probe(device_t); 60 static int amphy_attach(device_t); 61 62 static device_method_t amphy_methods[] = { 63 /* device interface */ 64 DEVMETHOD(device_probe, amphy_probe), 65 DEVMETHOD(device_attach, amphy_attach), 66 DEVMETHOD(device_detach, mii_phy_detach), 67 DEVMETHOD(device_shutdown, bus_generic_shutdown), 68 { 0, 0 } 69 }; 70 71 static devclass_t amphy_devclass; 72 73 static driver_t amphy_driver = { 74 "amphy", 75 amphy_methods, 76 sizeof(struct mii_softc) 77 }; 78 79 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 80 81 static int amphy_service(struct mii_softc *, struct mii_data *, int); 82 static void amphy_status(struct mii_softc *); 83 84 static int 85 amphy_probe(dev) 86 device_t dev; 87 { 88 struct mii_attach_args *ma; 89 90 ma = device_get_ivars(dev); 91 92 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 93 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 94 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 95 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 96 return(ENXIO); 97 98 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 99 device_set_desc(dev, MII_STR_xxAMD_79C873); 100 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 101 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 102 103 return(0); 104 } 105 106 static int 107 amphy_attach(dev) 108 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 sc->mii_dev = device_get_parent(dev); 117 mii = device_get_softc(sc->mii_dev); 118 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 119 120 sc->mii_inst = mii->mii_instance; 121 sc->mii_phy = ma->mii_phyno; 122 sc->mii_service = amphy_service; 123 sc->mii_pdata = mii; 124 125 sc->mii_flags |= MIIF_NOISOLATE; 126 mii->mii_instance++; 127 128 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 129 130 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 131 BMCR_ISO); 132 #if 0 133 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 134 BMCR_LOOP|BMCR_S100); 135 #endif 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 mii_add_media(sc); 143 printf("\n"); 144 #undef ADD 145 MIIBUS_MEDIAINIT(sc->mii_dev); 146 return(0); 147 } 148 149 static int 150 amphy_service(sc, mii, cmd) 151 struct mii_softc *sc; 152 struct mii_data *mii; 153 int cmd; 154 { 155 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 156 int reg; 157 158 switch (cmd) { 159 case MII_POLLSTAT: 160 /* 161 * If we're not polling our PHY instance, just return. 162 */ 163 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 164 return (0); 165 break; 166 167 case MII_MEDIACHG: 168 /* 169 * If the media indicates a different PHY instance, 170 * isolate ourselves. 171 */ 172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 173 reg = PHY_READ(sc, MII_BMCR); 174 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 175 return (0); 176 } 177 178 /* 179 * If the interface is not up, don't do anything. 180 */ 181 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 182 break; 183 184 switch (IFM_SUBTYPE(ife->ifm_media)) { 185 case IFM_AUTO: 186 /* 187 * If we're already in auto mode, just return. 188 */ 189 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 190 return (0); 191 (void) mii_phy_auto(sc); 192 break; 193 case IFM_100_T4: 194 /* 195 * XXX Not supported as a manual setting right now. 196 */ 197 return (EINVAL); 198 default: 199 /* 200 * BMCR data is stored in the ifmedia entry. 201 */ 202 PHY_WRITE(sc, MII_ANAR, 203 mii_anar(ife->ifm_media)); 204 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 205 } 206 break; 207 208 case MII_TICK: 209 /* 210 * If we're not currently selected, just return. 211 */ 212 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 213 return (0); 214 if (mii_phy_tick(sc) == EJUSTRETURN) 215 return (0); 216 break; 217 } 218 219 /* Update the media status. */ 220 amphy_status(sc); 221 222 /* Callback if something changed. */ 223 mii_phy_update(sc, cmd); 224 return (0); 225 } 226 227 static void 228 amphy_status(sc) 229 struct mii_softc *sc; 230 { 231 struct mii_data *mii = sc->mii_pdata; 232 int bmsr, bmcr, par, anlpar; 233 234 mii->mii_media_status = IFM_AVALID; 235 mii->mii_media_active = IFM_ETHER; 236 237 bmsr = PHY_READ(sc, MII_BMSR) | 238 PHY_READ(sc, MII_BMSR); 239 if (bmsr & BMSR_LINK) 240 mii->mii_media_status |= IFM_ACTIVE; 241 242 bmcr = PHY_READ(sc, MII_BMCR); 243 if (bmcr & BMCR_ISO) { 244 mii->mii_media_active |= IFM_NONE; 245 mii->mii_media_status = 0; 246 return; 247 } 248 249 if (bmcr & BMCR_LOOP) 250 mii->mii_media_active |= IFM_LOOP; 251 252 if (bmcr & BMCR_AUTOEN) { 253 /* 254 * The PAR status bits are only valid of autonegotiation 255 * has completed (or it's disabled). 256 */ 257 if ((bmsr & BMSR_ACOMP) == 0) { 258 /* Erg, still trying, I guess... */ 259 mii->mii_media_active |= IFM_NONE; 260 return; 261 } 262 263 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 264 anlpar = PHY_READ(sc, MII_ANAR) & 265 PHY_READ(sc, MII_ANLPAR); 266 if (anlpar & ANLPAR_T4) 267 mii->mii_media_active |= IFM_100_T4; 268 else if (anlpar & ANLPAR_TX_FD) 269 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 270 else if (anlpar & ANLPAR_TX) 271 mii->mii_media_active |= IFM_100_TX; 272 else if (anlpar & ANLPAR_10_FD) 273 mii->mii_media_active |= IFM_10_T|IFM_FDX; 274 else if (anlpar & ANLPAR_10) 275 mii->mii_media_active |= IFM_10_T; 276 else 277 mii->mii_media_active |= IFM_NONE; 278 return; 279 } 280 281 /* 282 * Link partner is not capable of autonegotiation. 283 */ 284 par = PHY_READ(sc, MII_AMPHY_DSCSR); 285 if (par & DSCSR_100FDX) 286 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 287 else if (par & DSCSR_100HDX) 288 mii->mii_media_active |= IFM_100_TX; 289 else if (par & DSCSR_10FDX) 290 mii->mii_media_active |= IFM_10_T|IFM_HDX; 291 else if (par & DSCSR_10HDX) 292 mii->mii_media_active |= IFM_10_T; 293 } else 294 mii->mii_media_active = mii_media_from_bmcr(bmcr); 295 } 296