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 33 /* 34 * driver for RealTek 8139 internal PHYs 35 */ 36 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/socket.h> 44 #include <sys/bus.h> 45 46 #include <net/if.h> 47 #include <net/if_arp.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 <machine/bus.h> 55 #include <pci/if_rlreg.h> 56 57 #include "miibus_if.h" 58 59 static int rlphy_probe(device_t); 60 static int rlphy_attach(device_t); 61 62 static device_method_t rlphy_methods[] = { 63 /* device interface */ 64 DEVMETHOD(device_probe, rlphy_probe), 65 DEVMETHOD(device_attach, rlphy_attach), 66 DEVMETHOD(device_detach, mii_phy_detach), 67 DEVMETHOD(device_shutdown, bus_generic_shutdown), 68 { 0, 0 } 69 }; 70 71 static devclass_t rlphy_devclass; 72 73 static driver_t rlphy_driver = { 74 "rlphy", 75 rlphy_methods, 76 sizeof(struct mii_softc) 77 }; 78 79 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 80 81 static int rlphy_service(struct mii_softc *, struct mii_data *, int); 82 static void rlphy_status(struct mii_softc *); 83 84 static int 85 rlphy_probe(dev) 86 device_t dev; 87 { 88 struct mii_attach_args *ma; 89 device_t parent; 90 91 ma = device_get_ivars(dev); 92 parent = device_get_parent(device_get_parent(dev)); 93 94 /* Test for RealTek 8201L PHY */ 95 if (MII_OUI(ma->mii_id1, ma->mii_id2) == MII_OUI_REALTEK && 96 MII_MODEL(ma->mii_id2) == MII_MODEL_REALTEK_RTL8201L) { 97 device_set_desc(dev, MII_STR_REALTEK_RTL8201L); 98 return(0); 99 } 100 101 /* 102 * RealTek PHY doesn't have vendor/device ID registers: 103 * the rl driver fakes up a return value of all zeros. 104 */ 105 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 106 MII_MODEL(ma->mii_id2) != 0) 107 return (ENXIO); 108 109 /* 110 * Make sure the parent is an `rl'. 111 */ 112 if (strcmp(device_get_name(parent), "rl") != 0) 113 return (ENXIO); 114 115 device_set_desc(dev, "RealTek internal media interface"); 116 117 return (0); 118 } 119 120 static int 121 rlphy_attach(dev) 122 device_t dev; 123 { 124 struct mii_softc *sc; 125 struct mii_attach_args *ma; 126 struct mii_data *mii; 127 128 sc = device_get_softc(dev); 129 ma = device_get_ivars(dev); 130 sc->mii_dev = device_get_parent(dev); 131 mii = device_get_softc(sc->mii_dev); 132 133 /* 134 * The RealTek PHY can never be isolated, so never allow non-zero 135 * instances! 136 */ 137 if (mii->mii_instance != 0) { 138 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 139 return(ENXIO); 140 } 141 142 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 143 144 sc->mii_inst = mii->mii_instance; 145 sc->mii_phy = ma->mii_phyno; 146 sc->mii_service = rlphy_service; 147 sc->mii_pdata = mii; 148 mii->mii_instance++; 149 150 sc->mii_flags |= MIIF_NOISOLATE; 151 152 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 153 154 #if 0 /* See above. */ 155 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_NONE, 0, sc->mii_inst), 156 BMCR_ISO); 157 #endif 158 159 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 160 BMCR_LOOP|BMCR_S100); 161 162 mii_phy_reset(sc); 163 164 sc->mii_capabilities = 165 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 166 device_printf(dev, " "); 167 mii_add_media(sc); 168 printf("\n"); 169 #undef ADD 170 MIIBUS_MEDIAINIT(sc->mii_dev); 171 return(0); 172 } 173 174 static int 175 rlphy_service(sc, mii, cmd) 176 struct mii_softc *sc; 177 struct mii_data *mii; 178 int cmd; 179 { 180 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 181 182 /* 183 * We can't isolate the RealTek PHY, so it has to be the only one! 184 */ 185 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 186 panic("rlphy_service: can't isolate RealTek PHY"); 187 188 switch (cmd) { 189 case MII_POLLSTAT: 190 break; 191 192 case MII_MEDIACHG: 193 /* 194 * If the interface is not up, don't do anything. 195 */ 196 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 197 break; 198 199 switch (IFM_SUBTYPE(ife->ifm_media)) { 200 case IFM_AUTO: 201 /* 202 * If we're already in auto mode, just return. 203 */ 204 if (PHY_READ(sc, MII_BMCR) & BMCR_AUTOEN) 205 return (0); 206 (void) mii_phy_auto(sc); 207 break; 208 case IFM_100_T4: 209 /* 210 * XXX Not supported as a manual setting right now. 211 */ 212 return (EINVAL); 213 default: 214 /* 215 * BMCR data is stored in the ifmedia entry. 216 */ 217 PHY_WRITE(sc, MII_ANAR, 218 mii_anar(ife->ifm_media)); 219 PHY_WRITE(sc, MII_BMCR, ife->ifm_data); 220 } 221 break; 222 223 case MII_TICK: 224 /* 225 * Is the interface even up? 226 */ 227 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 228 return (0); 229 230 /* 231 * Only used for autonegotiation. 232 */ 233 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 234 break; 235 236 /* 237 * The RealTek PHY's autonegotiation doesn't need to be 238 * kicked; it continues in the background. 239 */ 240 break; 241 } 242 243 /* Update the media status. */ 244 rlphy_status(sc); 245 246 /* Callback if something changed. */ 247 mii_phy_update(sc, cmd); 248 return (0); 249 } 250 251 static void 252 rlphy_status(phy) 253 struct mii_softc *phy; 254 { 255 struct mii_data *mii = phy->mii_pdata; 256 int bmsr, bmcr, anlpar; 257 device_t parent; 258 259 mii->mii_media_status = IFM_AVALID; 260 mii->mii_media_active = IFM_ETHER; 261 262 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 263 if (bmsr & BMSR_LINK) 264 mii->mii_media_status |= IFM_ACTIVE; 265 266 bmcr = PHY_READ(phy, MII_BMCR); 267 if (bmcr & BMCR_ISO) { 268 mii->mii_media_active |= IFM_NONE; 269 mii->mii_media_status = 0; 270 return; 271 } 272 273 if (bmcr & BMCR_LOOP) 274 mii->mii_media_active |= IFM_LOOP; 275 276 if (bmcr & BMCR_AUTOEN) { 277 /* 278 * NWay autonegotiation takes the highest-order common 279 * bit of the ANAR and ANLPAR (i.e. best media advertised 280 * both by us and our link partner). 281 */ 282 if ((bmsr & BMSR_ACOMP) == 0) { 283 /* Erg, still trying, I guess... */ 284 mii->mii_media_active |= IFM_NONE; 285 return; 286 } 287 288 if ((anlpar = PHY_READ(phy, MII_ANAR) & 289 PHY_READ(phy, MII_ANLPAR))) { 290 if (anlpar & ANLPAR_T4) 291 mii->mii_media_active |= IFM_100_T4; 292 else if (anlpar & ANLPAR_TX_FD) 293 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 294 else if (anlpar & ANLPAR_TX) 295 mii->mii_media_active |= IFM_100_TX; 296 else if (anlpar & ANLPAR_10_FD) 297 mii->mii_media_active |= IFM_10_T|IFM_FDX; 298 else if (anlpar & ANLPAR_10) 299 mii->mii_media_active |= IFM_10_T; 300 else 301 mii->mii_media_active |= IFM_NONE; 302 return; 303 } 304 /* 305 * If the other side doesn't support NWAY, then the 306 * best we can do is determine if we have a 10Mbps or 307 * 100Mbps link. There's no way to know if the link 308 * is full or half duplex, so we default to half duplex 309 * and hope that the user is clever enough to manually 310 * change the media settings if we're wrong. 311 */ 312 313 314 /* 315 * The RealTek PHY supports non-NWAY link speed 316 * detection, however it does not report the link 317 * detection results via the ANLPAR or BMSR registers. 318 * (What? RealTek doesn't do things the way everyone 319 * else does? I'm just shocked, shocked I tell you.) 320 * To determine the link speed, we have to do one 321 * of two things: 322 * 323 * - If this is a standalone RealTek RTL8201(L) PHY, 324 * we can determine the link speed by testing bit 0 325 * in the magic, vendor-specific register at offset 326 * 0x19. 327 * 328 * - If this is a RealTek MAC with integrated PHY, we 329 * can test the 'SPEED10' bit of the MAC's media status 330 * register. 331 */ 332 parent = device_get_parent(phy->mii_dev); 333 if (strcmp(device_get_name(parent), "rl") != 0) { 334 if (PHY_READ(phy, 0x0019) & 0x01) 335 mii->mii_media_active |= IFM_100_TX; 336 else 337 mii->mii_media_active |= IFM_10_T; 338 } else { 339 if (PHY_READ(phy, RL_MEDIASTAT) & 340 RL_MEDIASTAT_SPEED10) 341 mii->mii_media_active |= IFM_10_T; 342 else 343 mii->mii_media_active |= IFM_100_TX; 344 } 345 346 } else 347 mii->mii_media_active = mii_media_from_bmcr(bmcr); 348 } 349