1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2001-2003, Shunsuke Akiyama <akiyama@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * driver for RealTek RTL8150 internal PHY 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/malloc.h> 41 #include <sys/module.h> 42 #include <sys/socket.h> 43 #include <sys/bus.h> 44 45 #include <net/if.h> 46 #include <net/if_arp.h> 47 #include <net/if_media.h> 48 49 #include <dev/mii/mii.h> 50 #include <dev/mii/miivar.h> 51 #include "miidevs.h" 52 53 #include <dev/usb/net/ruephyreg.h> 54 55 #include "miibus_if.h" 56 57 static int ruephy_probe(device_t); 58 static int ruephy_attach(device_t); 59 60 static device_method_t ruephy_methods[] = { 61 /* device interface */ 62 DEVMETHOD(device_probe, ruephy_probe), 63 DEVMETHOD(device_attach, ruephy_attach), 64 DEVMETHOD(device_detach, mii_phy_detach), 65 DEVMETHOD(device_shutdown, bus_generic_shutdown), 66 DEVMETHOD_END 67 }; 68 69 static driver_t ruephy_driver = { 70 .name = "ruephy", 71 .methods = ruephy_methods, 72 .size = sizeof(struct mii_softc) 73 }; 74 75 DRIVER_MODULE(ruephy, miibus, ruephy_driver, 0, 0); 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 mii_phy_setmedia(sc); 127 break; 128 129 case MII_TICK: 130 /* 131 * Only used for autonegotiation. 132 */ 133 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 134 break; 135 136 /* 137 * Check to see if we have link. If we do, we don't 138 * need to restart the autonegotiation process. Read 139 * the MSR twice in case it's latched. 140 */ 141 reg = PHY_READ(sc, RUEPHY_MII_MSR) | 142 PHY_READ(sc, RUEPHY_MII_MSR); 143 if (reg & RUEPHY_MSR_LINK) 144 break; 145 146 /* Only retry autonegotiation every mii_anegticks seconds. */ 147 if (sc->mii_ticks <= sc->mii_anegticks) 148 break; 149 150 sc->mii_ticks = 0; 151 PHY_RESET(sc); 152 if (mii_phy_auto(sc) == EJUSTRETURN) 153 return (0); 154 break; 155 } 156 157 /* Update the media status. */ 158 PHY_STATUS(sc); 159 160 /* Callback if something changed. */ 161 mii_phy_update(sc, cmd); 162 163 return (0); 164 } 165 166 static void 167 ruephy_reset(struct mii_softc *sc) 168 { 169 170 mii_phy_reset(sc); 171 172 /* 173 * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after 174 * XXX reset, which breaks autonegotiation. 175 */ 176 PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX)); 177 } 178 179 static void 180 ruephy_status(struct mii_softc *phy) 181 { 182 struct mii_data *mii = phy->mii_pdata; 183 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 184 int bmsr, bmcr, msr; 185 186 mii->mii_media_status = IFM_AVALID; 187 mii->mii_media_active = IFM_ETHER; 188 189 msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR); 190 if (msr & RUEPHY_MSR_LINK) 191 mii->mii_media_status |= IFM_ACTIVE; 192 193 bmcr = PHY_READ(phy, MII_BMCR); 194 if (bmcr & BMCR_ISO) { 195 mii->mii_media_active |= IFM_NONE; 196 mii->mii_media_status = 0; 197 return; 198 } 199 200 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 201 if (bmcr & BMCR_AUTOEN) { 202 if ((bmsr & BMSR_ACOMP) == 0) { 203 /* Erg, still trying, I guess... */ 204 mii->mii_media_active |= IFM_NONE; 205 return; 206 } 207 208 if (msr & RUEPHY_MSR_SPEED100) 209 mii->mii_media_active |= IFM_100_TX; 210 else 211 mii->mii_media_active |= IFM_10_T; 212 213 if (msr & RUEPHY_MSR_DUPLEX) 214 mii->mii_media_active |= 215 IFM_FDX | mii_phy_flowstatus(phy); 216 else 217 mii->mii_media_active |= IFM_HDX; 218 } else 219 mii->mii_media_active = ife->ifm_media; 220 } 221