1 /*- 2 * Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@FreeBSD.org>. 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * driver for RealTek RTL8150 internal PHY 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/socket.h> 41 #include <sys/bus.h> 42 43 #include <net/if.h> 44 #include <net/if_arp.h> 45 #include <net/if_media.h> 46 47 #include <dev/mii/mii.h> 48 #include <dev/mii/miivar.h> 49 #include "miidevs.h" 50 51 #include <dev/usb/net/ruephyreg.h> 52 53 #include "miibus_if.h" 54 55 static int ruephy_probe(device_t); 56 static int ruephy_attach(device_t); 57 58 static device_method_t ruephy_methods[] = { 59 /* device interface */ 60 DEVMETHOD(device_probe, ruephy_probe), 61 DEVMETHOD(device_attach, ruephy_attach), 62 DEVMETHOD(device_detach, mii_phy_detach), 63 DEVMETHOD(device_shutdown, bus_generic_shutdown), 64 DEVMETHOD_END 65 }; 66 67 static devclass_t ruephy_devclass; 68 69 static driver_t ruephy_driver = { 70 "ruephy", 71 ruephy_methods, 72 sizeof(struct mii_softc) 73 }; 74 75 DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, NULL, NULL); 76 77 static int ruephy_service(struct mii_softc *, struct mii_data *, int); 78 static void ruephy_reset(struct mii_softc *); 79 static void ruephy_status(struct mii_softc *); 80 81 /* 82 * The RealTek RTL8150 internal PHY doesn't have vendor/device ID 83 * registers; rue(4) fakes up a return value of all zeros. 84 */ 85 static const struct mii_phydesc ruephys[] = { 86 { 0, 0, "RealTek RTL8150 internal media interface" }, 87 MII_PHY_END 88 }; 89 90 static const struct mii_phy_funcs ruephy_funcs = { 91 ruephy_service, 92 ruephy_status, 93 ruephy_reset 94 }; 95 96 static int 97 ruephy_probe(device_t dev) 98 { 99 100 if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))), 101 "rue") == 0) 102 return (mii_phy_dev_probe(dev, ruephys, BUS_PROBE_DEFAULT)); 103 return (ENXIO); 104 } 105 106 static int 107 ruephy_attach(device_t dev) 108 { 109 110 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 111 &ruephy_funcs, 1); 112 return (0); 113 } 114 115 static int 116 ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 117 { 118 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 119 int reg; 120 121 switch (cmd) { 122 case MII_POLLSTAT: 123 break; 124 125 case MII_MEDIACHG: 126 /* 127 * If the interface is not up, don't do anything. 128 */ 129 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 130 break; 131 132 mii_phy_setmedia(sc); 133 break; 134 135 case MII_TICK: 136 /* 137 * Is the interface even up? 138 */ 139 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 140 return (0); 141 142 /* 143 * Only used for autonegotiation. 144 */ 145 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 146 break; 147 148 /* 149 * Check to see if we have link. If we do, we don't 150 * need to restart the autonegotiation process. Read 151 * the MSR twice in case it's latched. 152 */ 153 reg = PHY_READ(sc, RUEPHY_MII_MSR) | 154 PHY_READ(sc, RUEPHY_MII_MSR); 155 if (reg & RUEPHY_MSR_LINK) 156 break; 157 158 /* Only retry autonegotiation every mii_anegticks seconds. */ 159 if (sc->mii_ticks <= sc->mii_anegticks) 160 break; 161 162 sc->mii_ticks = 0; 163 PHY_RESET(sc); 164 if (mii_phy_auto(sc) == EJUSTRETURN) 165 return (0); 166 break; 167 } 168 169 /* Update the media status. */ 170 PHY_STATUS(sc); 171 172 /* Callback if something changed. */ 173 mii_phy_update(sc, cmd); 174 175 return (0); 176 } 177 178 static void 179 ruephy_reset(struct mii_softc *sc) 180 { 181 182 mii_phy_reset(sc); 183 184 /* 185 * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after 186 * XXX reset, which breaks autonegotiation. 187 */ 188 PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX)); 189 } 190 191 static void 192 ruephy_status(struct mii_softc *phy) 193 { 194 struct mii_data *mii = phy->mii_pdata; 195 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 196 int bmsr, bmcr, msr; 197 198 mii->mii_media_status = IFM_AVALID; 199 mii->mii_media_active = IFM_ETHER; 200 201 msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR); 202 if (msr & RUEPHY_MSR_LINK) 203 mii->mii_media_status |= IFM_ACTIVE; 204 205 bmcr = PHY_READ(phy, MII_BMCR); 206 if (bmcr & BMCR_ISO) { 207 mii->mii_media_active |= IFM_NONE; 208 mii->mii_media_status = 0; 209 return; 210 } 211 212 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 213 if (bmcr & BMCR_AUTOEN) { 214 if ((bmsr & BMSR_ACOMP) == 0) { 215 /* Erg, still trying, I guess... */ 216 mii->mii_media_active |= IFM_NONE; 217 return; 218 } 219 220 if (msr & RUEPHY_MSR_SPEED100) 221 mii->mii_media_active |= IFM_100_TX; 222 else 223 mii->mii_media_active |= IFM_10_T; 224 225 if (msr & RUEPHY_MSR_DUPLEX) 226 mii->mii_media_active |= 227 IFM_FDX | mii_phy_flowstatus(phy); 228 else 229 mii->mii_media_active |= IFM_HDX; 230 } else 231 mii->mii_media_active = ife->ifm_media; 232 } 233