1 /* 2 * Copyright (c) 1997, 1998, 1999 3 * Bill Paul <wpaul@ctr.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: src/sys/dev/mii/rlphy.c,v 1.2.2.4 2002/11/08 21:53:49 semenu Exp $ 33 * $DragonFly: src/sys/dev/netif/mii_layer/rlphy.c,v 1.4 2003/08/27 09:38:31 rob Exp $ 34 * 35 * $FreeBSD: src/sys/dev/mii/rlphy.c,v 1.2.2.4 2002/11/08 21:53:49 semenu Exp $ 36 */ 37 38 /* 39 * driver for RealTek 8139 internal PHYs 40 */ 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_arp.h> 50 #include <net/if_media.h> 51 52 #include "mii.h" 53 #include "miivar.h" 54 #include "miidevs.h" 55 56 #include <machine/bus.h> 57 #include "../rl/if_rlreg.h" 58 59 #include "miibus_if.h" 60 61 static int rlphy_probe (device_t); 62 static int rlphy_attach (device_t); 63 static int rlphy_detach (device_t); 64 65 static device_method_t rlphy_methods[] = { 66 /* device interface */ 67 DEVMETHOD(device_probe, rlphy_probe), 68 DEVMETHOD(device_attach, rlphy_attach), 69 DEVMETHOD(device_detach, rlphy_detach), 70 DEVMETHOD(device_shutdown, bus_generic_shutdown), 71 { 0, 0 } 72 }; 73 74 static devclass_t rlphy_devclass; 75 76 static driver_t rlphy_driver = { 77 "rlphy", 78 rlphy_methods, 79 sizeof(struct mii_softc) 80 }; 81 82 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 83 84 int rlphy_service (struct mii_softc *, struct mii_data *, int); 85 void rlphy_status (struct mii_softc *); 86 87 static int rlphy_probe(dev) 88 device_t dev; 89 { 90 struct mii_attach_args *ma; 91 device_t parent; 92 93 ma = device_get_ivars(dev); 94 parent = device_get_parent(device_get_parent(dev)); 95 96 /* Test for RealTek 8201L PHY */ 97 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_REALTEK && 98 MII_MODEL(ma->mii_id2) == MII_MODEL_REALTEK_RTL8201L) { 99 device_set_desc(dev, MII_STR_REALTEK_RTL8201L); 100 return(0); 101 } 102 103 /* 104 * RealTek PHY doesn't have vendor/device ID registers: 105 * the rl driver fakes up a return value of all zeros. 106 */ 107 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 108 MII_MODEL(ma->mii_id2) != 0) 109 return (ENXIO); 110 111 /* 112 * Make sure the parent is an `rl'. 113 */ 114 if (strcmp(device_get_name(parent), "rl") != 0) 115 return (ENXIO); 116 117 device_set_desc(dev, "RealTek internal media interface"); 118 119 return (0); 120 } 121 122 static int rlphy_attach(dev) 123 device_t dev; 124 { 125 struct mii_softc *sc; 126 struct mii_attach_args *ma; 127 struct mii_data *mii; 128 129 sc = device_get_softc(dev); 130 ma = device_get_ivars(dev); 131 sc->mii_dev = device_get_parent(dev); 132 mii = device_get_softc(sc->mii_dev); 133 134 /* 135 * The RealTek PHY can never be isolated, so never allow non-zero 136 * instances! 137 */ 138 if (mii->mii_instance != 0) { 139 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 140 return(ENXIO); 141 } 142 143 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 144 145 sc->mii_inst = mii->mii_instance; 146 sc->mii_phy = ma->mii_phyno; 147 sc->mii_service = rlphy_service; 148 sc->mii_pdata = mii; 149 mii->mii_instance++; 150 151 sc->mii_flags |= MIIF_NOISOLATE; 152 153 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 154 155 #if 0 /* See above. */ 156 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 157 BMCR_ISO); 158 #endif 159 160 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 161 BMCR_LOOP|BMCR_S100); 162 163 mii_phy_reset(sc); 164 165 sc->mii_capabilities = 166 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 167 device_printf(dev, " "); 168 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 169 printf("no media present"); 170 else 171 mii_add_media(mii, sc->mii_capabilities, 172 sc->mii_inst); 173 printf("\n"); 174 #undef ADD 175 MIIBUS_MEDIAINIT(sc->mii_dev); 176 return(0); 177 } 178 179 static int rlphy_detach(dev) 180 device_t dev; 181 { 182 struct mii_softc *sc; 183 struct mii_data *mii; 184 185 sc = device_get_softc(dev); 186 mii = device_get_softc(device_get_softc(dev)); 187 mii_phy_auto_stop(sc); 188 sc->mii_dev = NULL; 189 LIST_REMOVE(sc, mii_list); 190 191 return(0); 192 } 193 194 int 195 rlphy_service(sc, mii, cmd) 196 struct mii_softc *sc; 197 struct mii_data *mii; 198 int cmd; 199 { 200 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 201 202 /* 203 * We can't isolate the RealTek PHY, so it has to be the only one! 204 */ 205 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 206 panic("rlphy_service: can't isolate RealTek PHY"); 207 208 switch (cmd) { 209 case MII_POLLSTAT: 210 break; 211 212 case MII_MEDIACHG: 213 /* 214 * If the interface is not up, don't do anything. 215 */ 216 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 217 break; 218 219 switch (IFM_SUBTYPE(ife->ifm_media)) { 220 case IFM_AUTO: 221 /* 222 * If we're already in auto mode, just return. 223 */ 224 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 225 return (0); 226 (void) mii_phy_auto(sc, 0); 227 break; 228 case IFM_100_T4: 229 /* 230 * XXX Not supported as a manual setting right now. 231 */ 232 return (EINVAL); 233 default: 234 /* 235 * BMCR data is stored in the ifmedia entry. 236 */ 237 PHY_WRITE(sc, MII_ANAR, 238 mii_anar(ife->ifm_media)); 239 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 240 } 241 break; 242 243 case MII_TICK: 244 /* 245 * Only used for autonegotiation. 246 */ 247 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 248 return (0); 249 250 /* 251 * Is the interface even up? 252 */ 253 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 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; 263 264 /* 265 * The RealTek PHY's autonegotiation doesn't need to be 266 * kicked; it continues in the background. 267 */ 268 break; 269 } 270 271 /* Update the media status. */ 272 rlphy_status(sc); 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 } 281 282 void 283 rlphy_status(phy) 284 struct mii_softc *phy; 285 { 286 struct mii_data *mii = phy->mii_pdata; 287 int bmsr, bmcr, anlpar; 288 device_t parent; 289 290 mii->mii_media_status = IFM_AVALID; 291 mii->mii_media_active = IFM_ETHER; 292 293 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 294 if (bmsr & BMSR_LINK) 295 mii->mii_media_status |= IFM_ACTIVE; 296 297 bmcr = PHY_READ(phy, MII_BMCR); 298 if (bmcr & BMCR_ISO) { 299 mii->mii_media_active |= IFM_NONE; 300 mii->mii_media_status = 0; 301 return; 302 } 303 304 if (bmcr & BMCR_LOOP) 305 mii->mii_media_active |= IFM_LOOP; 306 307 if (bmcr & BMCR_AUTOEN) { 308 /* 309 * NWay autonegotiation takes the highest-order common 310 * bit of the ANAR and ANLPAR (i.e. best media advertised 311 * both by us and our link partner). 312 */ 313 if ((bmsr & BMSR_ACOMP) == 0) { 314 /* Erg, still trying, I guess... */ 315 mii->mii_media_active |= IFM_NONE; 316 return; 317 } 318 319 if ((anlpar = PHY_READ(phy, MII_ANAR) & 320 PHY_READ(phy, MII_ANLPAR))) { 321 if (anlpar & ANLPAR_T4) 322 mii->mii_media_active |= IFM_100_T4; 323 else if (anlpar & ANLPAR_TX_FD) 324 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 325 else if (anlpar & ANLPAR_TX) 326 mii->mii_media_active |= IFM_100_TX; 327 else if (anlpar & ANLPAR_10_FD) 328 mii->mii_media_active |= IFM_10_T|IFM_FDX; 329 else if (anlpar & ANLPAR_10) 330 mii->mii_media_active |= IFM_10_T; 331 else 332 mii->mii_media_active |= IFM_NONE; 333 return; 334 } 335 /* 336 * If the other side doesn't support NWAY, then the 337 * best we can do is determine if we have a 10Mbps or 338 * 100Mbps link. There's no way to know if the link 339 * is full or half duplex, so we default to half duplex 340 * and hope that the user is clever enough to manually 341 * change the media settings if we're wrong. 342 */ 343 344 345 /* 346 * The RealTek PHY supports non-NWAY link speed 347 * detection, however it does not report the link 348 * detection results via the ANLPAR or BMSR registers. 349 * (What? RealTek doesn't do things the way everyone 350 * else does? I'm just shocked, shocked I tell you.) 351 * To determine the link speed, we have to do one 352 * of two things: 353 * 354 * - If this is a standalone RealTek RTL8201(L) PHY, 355 * we can determine the link speed by testing bit 0 356 * in the magic, vendor-specific register at offset 357 * 0x19. 358 * 359 * - If this is a RealTek MAC with integrated PHY, we 360 * can test the 'SPEED10' bit of the MAC's media status 361 * register. 362 */ 363 parent = device_get_parent(phy->mii_dev); 364 if (strcmp(device_get_name(parent), "rl") != 0) { 365 if (PHY_READ(phy, 0x0019) & 0x01) 366 mii->mii_media_active |= IFM_100_TX; 367 else 368 mii->mii_media_active |= IFM_10_T; 369 } else { 370 if (PHY_READ(phy, RL_MEDIASTAT) & 371 RL_MEDIASTAT_SPEED10) 372 mii->mii_media_active |= IFM_10_T; 373 else 374 mii->mii_media_active |= IFM_100_TX; 375 } 376 377 } else 378 mii->mii_media_active = mii_media_from_bmcr(bmcr); 379 } 380