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 struct rlphy_softc { 61 struct mii_softc sc_mii; /* generic PHY */ 62 int sc_is_RTL8201L; /* is an external RTL8201L PHY */ 63 }; 64 65 static int rlphy_probe(device_t); 66 static int rlphy_attach(device_t); 67 68 static device_method_t rlphy_methods[] = { 69 /* device interface */ 70 DEVMETHOD(device_probe, rlphy_probe), 71 DEVMETHOD(device_attach, rlphy_attach), 72 DEVMETHOD(device_detach, mii_phy_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 { 0, 0 } 75 }; 76 77 static devclass_t rlphy_devclass; 78 79 static driver_t rlphy_driver = { 80 "rlphy", 81 rlphy_methods, 82 sizeof(struct rlphy_softc) 83 }; 84 85 DRIVER_MODULE(rlphy, miibus, rlphy_driver, rlphy_devclass, 0, 0); 86 87 static int rlphy_service(struct mii_softc *, struct mii_data *, int); 88 static void rlphy_status(struct mii_softc *); 89 90 /* 91 * RealTek internal PHYs don't have vendor/device ID registers; 92 * re(4) and rl(4) fake up a return value of all zeros. 93 */ 94 static const struct mii_phydesc rlintphys[] = { 95 { 0, 0, "RealTek internal media interface" }, 96 MII_PHY_END 97 }; 98 99 static const struct mii_phydesc rlphys[] = { 100 MII_PHY_DESC(REALTEK, RTL8201L), 101 MII_PHY_DESC(ICPLUS, IP101), 102 MII_PHY_END 103 }; 104 105 static int 106 rlphy_probe(device_t dev) 107 { 108 const char *nic; 109 int rv; 110 111 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT); 112 if (rv <= 0) 113 return (rv); 114 115 nic = device_get_name(device_get_parent(device_get_parent(dev))); 116 if (strcmp(nic, "rl") == 0 || strcmp(nic, "re") == 0) 117 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT)); 118 return (ENXIO); 119 } 120 121 static int 122 rlphy_attach(device_t dev) 123 { 124 struct mii_softc *sc; 125 struct mii_attach_args *ma; 126 struct mii_data *mii; 127 struct rlphy_softc *rsc; 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 * Check whether we're the RTL8201L PHY and remember so the status 136 * routine can query the proper register for speed detection. 137 */ 138 rsc = (struct rlphy_softc *)sc; 139 if (mii_phy_dev_probe(dev, rlphys, 0) == 0) 140 rsc->sc_is_RTL8201L++; 141 142 /* 143 * The RealTek PHY can never be isolated, so never allow non-zero 144 * instances! 145 */ 146 if (mii->mii_instance != 0) { 147 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 148 return (ENXIO); 149 } 150 151 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 152 153 sc->mii_inst = mii->mii_instance; 154 sc->mii_phy = ma->mii_phyno; 155 sc->mii_service = rlphy_service; 156 sc->mii_pdata = mii; 157 mii->mii_instance++; 158 159 sc->mii_flags |= MIIF_NOISOLATE; 160 161 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 162 163 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 164 MII_MEDIA_100_TX); 165 166 mii_phy_reset(sc); 167 168 sc->mii_capabilities = 169 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 170 device_printf(dev, " "); 171 mii_phy_add_media(sc); 172 printf("\n"); 173 #undef ADD 174 MIIBUS_MEDIAINIT(sc->mii_dev); 175 return (0); 176 } 177 178 static int 179 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 180 { 181 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 182 183 /* 184 * We can't isolate the RealTek PHY, so it has to be the only one! 185 */ 186 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 187 panic("rlphy_service: can't isolate RealTek PHY"); 188 189 switch (cmd) { 190 case MII_POLLSTAT: 191 break; 192 193 case MII_MEDIACHG: 194 /* 195 * If the interface is not up, don't do anything. 196 */ 197 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 198 break; 199 200 mii_phy_setmedia(sc); 201 break; 202 203 case MII_TICK: 204 /* 205 * Is the interface even up? 206 */ 207 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 208 return (0); 209 210 /* 211 * The RealTek PHY's autonegotiation doesn't need to be 212 * kicked; it continues in the background. 213 */ 214 break; 215 } 216 217 /* Update the media status. */ 218 rlphy_status(sc); 219 220 /* Callback if something changed. */ 221 mii_phy_update(sc, cmd); 222 return (0); 223 } 224 225 static void 226 rlphy_status(struct mii_softc *phy) 227 { 228 struct rlphy_softc *rsc =(struct rlphy_softc *)phy; 229 struct mii_data *mii = phy->mii_pdata; 230 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 231 int bmsr, bmcr, anlpar; 232 233 mii->mii_media_status = IFM_AVALID; 234 mii->mii_media_active = IFM_ETHER; 235 236 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 237 if (bmsr & BMSR_LINK) 238 mii->mii_media_status |= IFM_ACTIVE; 239 240 bmcr = PHY_READ(phy, MII_BMCR); 241 if (bmcr & BMCR_ISO) { 242 mii->mii_media_active |= IFM_NONE; 243 mii->mii_media_status = 0; 244 return; 245 } 246 247 if (bmcr & BMCR_LOOP) 248 mii->mii_media_active |= IFM_LOOP; 249 250 if (bmcr & BMCR_AUTOEN) { 251 /* 252 * NWay autonegotiation takes the highest-order common 253 * bit of the ANAR and ANLPAR (i.e. best media advertised 254 * both by us and our link partner). 255 */ 256 if ((bmsr & BMSR_ACOMP) == 0) { 257 /* Erg, still trying, I guess... */ 258 mii->mii_media_active |= IFM_NONE; 259 return; 260 } 261 262 if ((anlpar = PHY_READ(phy, MII_ANAR) & 263 PHY_READ(phy, MII_ANLPAR))) { 264 if (anlpar & ANLPAR_TX_FD) 265 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 266 else if (anlpar & ANLPAR_T4) 267 mii->mii_media_active |= IFM_100_T4; 268 else if (anlpar & ANLPAR_TX) 269 mii->mii_media_active |= IFM_100_TX; 270 else if (anlpar & ANLPAR_10_FD) 271 mii->mii_media_active |= IFM_10_T|IFM_FDX; 272 else if (anlpar & ANLPAR_10) 273 mii->mii_media_active |= IFM_10_T; 274 else 275 mii->mii_media_active |= IFM_NONE; 276 return; 277 } 278 /* 279 * If the other side doesn't support NWAY, then the 280 * best we can do is determine if we have a 10Mbps or 281 * 100Mbps link. There's no way to know if the link 282 * is full or half duplex, so we default to half duplex 283 * and hope that the user is clever enough to manually 284 * change the media settings if we're wrong. 285 */ 286 287 /* 288 * The RealTek PHY supports non-NWAY link speed 289 * detection, however it does not report the link 290 * detection results via the ANLPAR or BMSR registers. 291 * (What? RealTek doesn't do things the way everyone 292 * else does? I'm just shocked, shocked I tell you.) 293 * To determine the link speed, we have to do one 294 * of two things: 295 * 296 * - If this is a standalone RealTek RTL8201(L) PHY, 297 * we can determine the link speed by testing bit 0 298 * in the magic, vendor-specific register at offset 299 * 0x19. 300 * 301 * - If this is a RealTek MAC with integrated PHY, we 302 * can test the 'SPEED10' bit of the MAC's media status 303 * register. 304 */ 305 if (rsc->sc_is_RTL8201L) { 306 if (PHY_READ(phy, 0x0019) & 0x01) 307 mii->mii_media_active |= IFM_100_TX; 308 else 309 mii->mii_media_active |= IFM_10_T; 310 } else { 311 if (PHY_READ(phy, RL_MEDIASTAT) & 312 RL_MEDIASTAT_SPEED10) 313 mii->mii_media_active |= IFM_10_T; 314 else 315 mii->mii_media_active |= IFM_100_TX; 316 } 317 } else 318 mii->mii_media_active = ife->ifm_media; 319 } 320