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 * $FreeBSD$ 33 */ 34 35 /* 36 * driver for AMD AM79c873 PHYs 37 * This driver also works for the Davicom DM9101 PHY, which appears to 38 * be an AM79c873 workalike. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/kernel.h> 44 #include <sys/socket.h> 45 #include <sys/bus.h> 46 47 #include <net/if.h> 48 #include <net/if_media.h> 49 50 #include <dev/mii/mii.h> 51 #include <dev/mii/miivar.h> 52 #include "miidevs.h" 53 54 #include <dev/mii/amphyreg.h> 55 56 #include "miibus_if.h" 57 58 #if !defined(lint) 59 static const char rcsid[] = 60 "$FreeBSD$"; 61 #endif 62 63 static int amphy_probe(device_t); 64 static int amphy_attach(device_t); 65 66 static device_method_t amphy_methods[] = { 67 /* device interface */ 68 DEVMETHOD(device_probe, amphy_probe), 69 DEVMETHOD(device_attach, amphy_attach), 70 DEVMETHOD(device_detach, mii_phy_detach), 71 DEVMETHOD(device_shutdown, bus_generic_shutdown), 72 { 0, 0 } 73 }; 74 75 static devclass_t amphy_devclass; 76 77 static driver_t amphy_driver = { 78 "amphy", 79 amphy_methods, 80 sizeof(struct mii_softc) 81 }; 82 83 DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 84 85 static int amphy_service(struct mii_softc *, struct mii_data *, int); 86 static void amphy_status(struct mii_softc *); 87 88 static int 89 amphy_probe(dev) 90 device_t dev; 91 { 92 struct mii_attach_args *ma; 93 94 ma = device_get_ivars(dev); 95 96 if ((MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxAMD || 97 MII_MODEL(ma->mii_id2) != MII_MODEL_xxAMD_79C873) && 98 (MII_OUI(ma->mii_id1, ma->mii_id2) != MII_OUI_xxDAVICOM || 99 MII_MODEL(ma->mii_id2) != MII_MODEL_xxDAVICOM_DM9101)) 100 return(ENXIO); 101 102 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxAMD) 103 device_set_desc(dev, MII_STR_xxAMD_79C873); 104 else if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_xxDAVICOM) 105 device_set_desc(dev, MII_STR_xxDAVICOM_DM9101); 106 107 return(0); 108 } 109 110 static int 111 amphy_attach(dev) 112 device_t dev; 113 { 114 struct mii_softc *sc; 115 struct mii_attach_args *ma; 116 struct mii_data *mii; 117 118 sc = device_get_softc(dev); 119 ma = device_get_ivars(dev); 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 = amphy_service; 127 sc->mii_pdata = mii; 128 129 sc->mii_flags |= MIIF_NOISOLATE; 130 mii->mii_instance++; 131 132 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 133 134 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 135 BMCR_ISO); 136 #if 0 137 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 138 BMCR_LOOP|BMCR_S100); 139 #endif 140 141 mii_phy_reset(sc); 142 143 sc->mii_capabilities = 144 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 145 device_printf(dev, " "); 146 mii_add_media(sc); 147 printf("\n"); 148 #undef ADD 149 MIIBUS_MEDIAINIT(sc->mii_dev); 150 return(0); 151 } 152 153 static int 154 amphy_service(sc, mii, cmd) 155 struct mii_softc *sc; 156 struct mii_data *mii; 157 int cmd; 158 { 159 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 160 int reg; 161 162 switch (cmd) { 163 case MII_POLLSTAT: 164 /* 165 * If we're not polling our PHY instance, just return. 166 */ 167 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 168 return (0); 169 break; 170 171 case MII_MEDIACHG: 172 /* 173 * If the media indicates a different PHY instance, 174 * isolate ourselves. 175 */ 176 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 177 reg = PHY_READ(sc, MII_BMCR); 178 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 179 return (0); 180 } 181 182 /* 183 * If the interface is not up, don't do anything. 184 */ 185 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 186 break; 187 188 switch (IFM_SUBTYPE(ife->ifm_media)) { 189 case IFM_AUTO: 190 /* 191 * If we're already in auto mode, just return. 192 */ 193 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 194 return (0); 195 (void) mii_phy_auto(sc); 196 break; 197 case IFM_100_T4: 198 /* 199 * XXX Not supported as a manual setting right now. 200 */ 201 return (EINVAL); 202 default: 203 /* 204 * BMCR data is stored in the ifmedia entry. 205 */ 206 PHY_WRITE(sc, MII_ANAR, 207 mii_anar(ife->ifm_media)); 208 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 209 } 210 break; 211 212 case MII_TICK: 213 /* 214 * If we're not currently selected, just return. 215 */ 216 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 217 return (0); 218 if (mii_phy_tick(sc) == EJUSTRETURN) 219 return (0); 220 break; 221 } 222 223 /* Update the media status. */ 224 amphy_status(sc); 225 226 /* Callback if something changed. */ 227 mii_phy_update(sc, cmd); 228 return (0); 229 } 230 231 static void 232 amphy_status(sc) 233 struct mii_softc *sc; 234 { 235 struct mii_data *mii = sc->mii_pdata; 236 int bmsr, bmcr, par, anlpar; 237 238 mii->mii_media_status = IFM_AVALID; 239 mii->mii_media_active = IFM_ETHER; 240 241 bmsr = PHY_READ(sc, MII_BMSR) | 242 PHY_READ(sc, MII_BMSR); 243 if (bmsr & BMSR_LINK) 244 mii->mii_media_status |= IFM_ACTIVE; 245 246 bmcr = PHY_READ(sc, MII_BMCR); 247 if (bmcr & BMCR_ISO) { 248 mii->mii_media_active |= IFM_NONE; 249 mii->mii_media_status = 0; 250 return; 251 } 252 253 if (bmcr & BMCR_LOOP) 254 mii->mii_media_active |= IFM_LOOP; 255 256 if (bmcr & BMCR_AUTOEN) { 257 /* 258 * The PAR status bits are only valid of autonegotiation 259 * has completed (or it's disabled). 260 */ 261 if ((bmsr & BMSR_ACOMP) == 0) { 262 /* Erg, still trying, I guess... */ 263 mii->mii_media_active |= IFM_NONE; 264 return; 265 } 266 267 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 268 anlpar = PHY_READ(sc, MII_ANAR) & 269 PHY_READ(sc, MII_ANLPAR); 270 if (anlpar & ANLPAR_T4) 271 mii->mii_media_active |= IFM_100_T4; 272 else if (anlpar & ANLPAR_TX_FD) 273 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 274 else if (anlpar & ANLPAR_TX) 275 mii->mii_media_active |= IFM_100_TX; 276 else if (anlpar & ANLPAR_10_FD) 277 mii->mii_media_active |= IFM_10_T|IFM_FDX; 278 else if (anlpar & ANLPAR_10) 279 mii->mii_media_active |= IFM_10_T; 280 else 281 mii->mii_media_active |= IFM_NONE; 282 return; 283 } 284 285 /* 286 * Link partner is not capable of autonegotiation. 287 */ 288 par = PHY_READ(sc, MII_AMPHY_DSCSR); 289 if (par & DSCSR_100FDX) 290 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 291 else if (par & DSCSR_100HDX) 292 mii->mii_media_active |= IFM_100_TX; 293 else if (par & DSCSR_10FDX) 294 mii->mii_media_active |= IFM_10_T|IFM_HDX; 295 else if (par & DSCSR_10HDX) 296 mii->mii_media_active |= IFM_10_T; 297 } else 298 mii->mii_media_active = mii_media_from_bmcr(bmcr); 299 } 300