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 /* 86 * RealTek internal PHYs don't have vendor/device ID registers; 87 * re(4) and rl(4) fake up a return value of all zeros. 88 */ 89 static const struct mii_phydesc rlintphys[] = { 90 { 0, 0, "RealTek internal media interface" }, 91 MII_PHY_END 92 }; 93 94 static const struct mii_phydesc rlphys[] = { 95 MII_PHY_DESC(REALTEK, RTL8201L), 96 MII_PHY_END 97 }; 98 99 static int 100 rlphy_probe(device_t dev) 101 { 102 const char *nic; 103 int rv; 104 105 rv = mii_phy_dev_probe(dev, rlphys, BUS_PROBE_DEFAULT); 106 if (rv <= 0) 107 return (rv); 108 109 nic = device_get_name(device_get_parent(device_get_parent(dev))); 110 if (strcmp(nic, "rl") == 0 || strcmp(nic, "re") == 0) 111 return (mii_phy_dev_probe(dev, rlintphys, BUS_PROBE_DEFAULT)); 112 return (ENXIO); 113 } 114 115 static int 116 rlphy_attach(device_t dev) 117 { 118 struct mii_softc *sc; 119 struct mii_attach_args *ma; 120 struct mii_data *mii; 121 122 sc = device_get_softc(dev); 123 ma = device_get_ivars(dev); 124 sc->mii_dev = device_get_parent(dev); 125 mii = device_get_softc(sc->mii_dev); 126 127 /* 128 * The RealTek PHY can never be isolated, so never allow non-zero 129 * instances! 130 */ 131 if (mii->mii_instance != 0) { 132 device_printf(dev, "ignoring this PHY, non-zero instance\n"); 133 return (ENXIO); 134 } 135 136 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 137 138 sc->mii_inst = mii->mii_instance; 139 sc->mii_phy = ma->mii_phyno; 140 sc->mii_service = rlphy_service; 141 sc->mii_pdata = mii; 142 mii->mii_instance++; 143 144 sc->mii_flags |= MIIF_NOISOLATE; 145 146 #define ADD(m, c) ifmedia_add(&mii->mii_media, (m), (c), NULL) 147 148 ADD(IFM_MAKEWORD(IFM_ETHER, IFM_100_TX, IFM_LOOP, sc->mii_inst), 149 MII_MEDIA_100_TX); 150 151 mii_phy_reset(sc); 152 153 sc->mii_capabilities = 154 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 155 device_printf(dev, " "); 156 mii_phy_add_media(sc); 157 printf("\n"); 158 #undef ADD 159 MIIBUS_MEDIAINIT(sc->mii_dev); 160 return (0); 161 } 162 163 static int 164 rlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 165 { 166 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 167 168 /* 169 * We can't isolate the RealTek PHY, so it has to be the only one! 170 */ 171 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 172 panic("rlphy_service: can't isolate RealTek PHY"); 173 174 switch (cmd) { 175 case MII_POLLSTAT: 176 break; 177 178 case MII_MEDIACHG: 179 /* 180 * If the interface is not up, don't do anything. 181 */ 182 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 183 break; 184 185 mii_phy_setmedia(sc); 186 break; 187 188 case MII_TICK: 189 /* 190 * Is the interface even up? 191 */ 192 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 193 return (0); 194 195 /* 196 * The RealTek PHY's autonegotiation doesn't need to be 197 * kicked; it continues in the background. 198 */ 199 break; 200 } 201 202 /* Update the media status. */ 203 rlphy_status(sc); 204 205 /* Callback if something changed. */ 206 mii_phy_update(sc, cmd); 207 return (0); 208 } 209 210 static void 211 rlphy_status(struct mii_softc *phy) 212 { 213 struct mii_data *mii = phy->mii_pdata; 214 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 215 int bmsr, bmcr, anlpar; 216 217 mii->mii_media_status = IFM_AVALID; 218 mii->mii_media_active = IFM_ETHER; 219 220 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 221 if (bmsr & BMSR_LINK) 222 mii->mii_media_status |= IFM_ACTIVE; 223 224 bmcr = PHY_READ(phy, MII_BMCR); 225 if (bmcr & BMCR_ISO) { 226 mii->mii_media_active |= IFM_NONE; 227 mii->mii_media_status = 0; 228 return; 229 } 230 231 if (bmcr & BMCR_LOOP) 232 mii->mii_media_active |= IFM_LOOP; 233 234 if (bmcr & BMCR_AUTOEN) { 235 /* 236 * NWay autonegotiation takes the highest-order common 237 * bit of the ANAR and ANLPAR (i.e. best media advertised 238 * both by us and our link partner). 239 */ 240 if ((bmsr & BMSR_ACOMP) == 0) { 241 /* Erg, still trying, I guess... */ 242 mii->mii_media_active |= IFM_NONE; 243 return; 244 } 245 246 if ((anlpar = PHY_READ(phy, MII_ANAR) & 247 PHY_READ(phy, MII_ANLPAR))) { 248 if (anlpar & ANLPAR_T4) 249 mii->mii_media_active |= IFM_100_T4; 250 else if (anlpar & ANLPAR_TX_FD) 251 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 252 else if (anlpar & ANLPAR_TX) 253 mii->mii_media_active |= IFM_100_TX; 254 else if (anlpar & ANLPAR_10_FD) 255 mii->mii_media_active |= IFM_10_T|IFM_FDX; 256 else if (anlpar & ANLPAR_10) 257 mii->mii_media_active |= IFM_10_T; 258 else 259 mii->mii_media_active |= IFM_NONE; 260 return; 261 } 262 /* 263 * If the other side doesn't support NWAY, then the 264 * best we can do is determine if we have a 10Mbps or 265 * 100Mbps link. There's no way to know if the link 266 * is full or half duplex, so we default to half duplex 267 * and hope that the user is clever enough to manually 268 * change the media settings if we're wrong. 269 */ 270 271 /* 272 * The RealTek PHY supports non-NWAY link speed 273 * detection, however it does not report the link 274 * detection results via the ANLPAR or BMSR registers. 275 * (What? RealTek doesn't do things the way everyone 276 * else does? I'm just shocked, shocked I tell you.) 277 * To determine the link speed, we have to do one 278 * of two things: 279 * 280 * - If this is a standalone RealTek RTL8201(L) PHY, 281 * we can determine the link speed by testing bit 0 282 * in the magic, vendor-specific register at offset 283 * 0x19. 284 * 285 * - If this is a RealTek MAC with integrated PHY, we 286 * can test the 'SPEED10' bit of the MAC's media status 287 * register. 288 */ 289 if (strcmp(mii->mii_ifp->if_dname, "rl") != 0) { 290 if (PHY_READ(phy, 0x0019) & 0x01) 291 mii->mii_media_active |= IFM_100_TX; 292 else 293 mii->mii_media_active |= IFM_10_T; 294 } else { 295 if (PHY_READ(phy, RL_MEDIASTAT) & 296 RL_MEDIASTAT_SPEED10) 297 mii->mii_media_active |= IFM_10_T; 298 else 299 mii->mii_media_active |= IFM_100_TX; 300 } 301 } else 302 mii->mii_media_active = ife->ifm_media; 303 } 304