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 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * driver for RealTek 8139 internal PHYs 38 */ 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/module.h> 44 #include <sys/socket.h> 45 #include <sys/bus.h> 46 47 #include <net/if.h> 48 #include <net/if_arp.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 <machine/bus.h> 56 #include <pci/if_rlreg.h> 57 58 #include "miibus_if.h" 59 60 static int rlphy_probe(device_t); 61 static int rlphy_attach(device_t); 62 63 static device_method_t rlphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, rlphy_probe), 66 DEVMETHOD(device_attach, rlphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 { 0, 0 } 70 }; 71 72 static devclass_t rlphy_devclass; 73 74 static driver_t rlphy_driver = { 75 "rlphy", 76 rlphy_methods, 77 sizeof(struct mii_softc) 78 }; 79 80 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 81 82 static int rlphy_service(struct mii_softc *, struct mii_data *, int); 83 static void rlphy_status(struct mii_softc *); 84 85 static const struct mii_phydesc rlphys[] = { 86 MII_PHY_DESC(REALTEK, RTL8201L), 87 MII_PHY_END 88 }; 89 90 static int 91 rlphy_probe(device_t dev) 92 { 93 struct mii_attach_args *ma; 94 const char *nic; 95 int rv; 96 97 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT); 98 if (rv <= 0) 99 return (rv); 100 101 /* 102 * RealTek interal PHYs don't have vendor/device ID registers; 103 * the `re' and `rl' drivers fake up a return value of all zeros. 104 */ 105 ma = device_get_ivars(dev); 106 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 || 107 MII_MODEL(ma->mii_id2) != 0) 108 return (ENXIO); 109 110 /* 111 * Make sure the parent is an `rl' or an `re'. 112 */ 113 nic = device_get_name(device_get_parent(device_get_parent(dev))); 114 if (strcmp(nic, "rl") != 0 && strcmp(nic, "re") != 0) 115 return (ENXIO); 116 117 device_set_desc(dev, "RealTek internal media interface"); 118 119 return (BUS_PROBE_DEFAULT); 120 } 121 122 static int 123 rlphy_attach(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 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 156 BMCR_LOOP|BMCR_S100); 157 158 mii_phy_reset(sc); 159 160 sc->mii_capabilities = 161 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 162 device_printf(dev, " "); 163 mii_phy_add_media(sc); 164 printf("\n"); 165 #undef ADD 166 MIIBUS_MEDIAINIT(sc->mii_dev); 167 return (0); 168 } 169 170 static int 171 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 172 { 173 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 174 175 /* 176 * We can't isolate the RealTek PHY, so it has to be the only one! 177 */ 178 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 179 panic("rlphy_service: can't isolate RealTek PHY"); 180 181 switch (cmd) { 182 case MII_POLLSTAT: 183 break; 184 185 case MII_MEDIACHG: 186 /* 187 * If the interface is not up, don't do anything. 188 */ 189 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 190 break; 191 192 mii_phy_setmedia(sc); 193 break; 194 195 case MII_TICK: 196 /* 197 * Is the interface even up? 198 */ 199 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 200 return (0); 201 202 /* 203 * The RealTek PHY's autonegotiation doesn't need to be 204 * kicked; it continues in the background. 205 */ 206 break; 207 } 208 209 /* Update the media status. */ 210 rlphy_status(sc); 211 212 /* Callback if something changed. */ 213 mii_phy_update(sc, cmd); 214 return (0); 215 } 216 217 static void 218 rlphy_status(struct mii_softc *phy) 219 { 220 struct mii_data *mii = phy->mii_pdata; 221 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 222 int bmsr, bmcr, anlpar; 223 224 mii->mii_media_status = IFM_AVALID; 225 mii->mii_media_active = IFM_ETHER; 226 227 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 228 if (bmsr & BMSR_LINK) 229 mii->mii_media_status |= IFM_ACTIVE; 230 231 bmcr = PHY_READ(phy, MII_BMCR); 232 if (bmcr & BMCR_ISO) { 233 mii->mii_media_active |= IFM_NONE; 234 mii->mii_media_status = 0; 235 return; 236 } 237 238 if (bmcr & BMCR_LOOP) 239 mii->mii_media_active |= IFM_LOOP; 240 241 if (bmcr & BMCR_AUTOEN) { 242 /* 243 * NWay autonegotiation takes the highest-order common 244 * bit of the ANAR and ANLPAR (i.e. best media advertised 245 * both by us and our link partner). 246 */ 247 if ((bmsr & BMSR_ACOMP) == 0) { 248 /* Erg, still trying, I guess... */ 249 mii->mii_media_active |= IFM_NONE; 250 return; 251 } 252 253 if ((anlpar = PHY_READ(phy, MII_ANAR) & 254 PHY_READ(phy, MII_ANLPAR))) { 255 if (anlpar & ANLPAR_T4) 256 mii->mii_media_active |= IFM_100_T4; 257 else if (anlpar & ANLPAR_TX_FD) 258 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 259 else if (anlpar & ANLPAR_TX) 260 mii->mii_media_active |= IFM_100_TX; 261 else if (anlpar & ANLPAR_10_FD) 262 mii->mii_media_active |= IFM_10_T|IFM_FDX; 263 else if (anlpar & ANLPAR_10) 264 mii->mii_media_active |= IFM_10_T; 265 else 266 mii->mii_media_active |= IFM_NONE; 267 return; 268 } 269 /* 270 * If the other side doesn't support NWAY, then the 271 * best we can do is determine if we have a 10Mbps or 272 * 100Mbps link. There's no way to know if the link 273 * is full or half duplex, so we default to half duplex 274 * and hope that the user is clever enough to manually 275 * change the media settings if we're wrong. 276 */ 277 278 /* 279 * The RealTek PHY supports non-NWAY link speed 280 * detection, however it does not report the link 281 * detection results via the ANLPAR or BMSR registers. 282 * (What? RealTek doesn't do things the way everyone 283 * else does? I'm just shocked, shocked I tell you.) 284 * To determine the link speed, we have to do one 285 * of two things: 286 * 287 * - If this is a standalone RealTek RTL8201(L) PHY, 288 * we can determine the link speed by testing bit 0 289 * in the magic, vendor-specific register at offset 290 * 0x19. 291 * 292 * - If this is a RealTek MAC with integrated PHY, we 293 * can test the 'SPEED10' bit of the MAC's media status 294 * register. 295 */ 296 if (strcmp(mii->mii_ifp->if_dname, "rl") != 0) { 297 if (PHY_READ(phy, 0x0019) & 0x01) 298 mii->mii_media_active |= IFM_100_TX; 299 else 300 mii->mii_media_active |= IFM_10_T; 301 } else { 302 if (PHY_READ(phy, RL_MEDIASTAT) & 303 RL_MEDIASTAT_SPEED10) 304 mii->mii_media_active |= IFM_10_T; 305 else 306 mii->mii_media_active |= IFM_100_TX; 307 } 308 } else 309 mii->mii_media_active = ife->ifm_media; 310 } 311