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 devclass_t ruephy_devclass; 70 71 static driver_t ruephy_driver = { 72 .name = "ruephy", 73 .methods = ruephy_methods, 74 .size = sizeof(struct mii_softc) 75 }; 76 77 DRIVER_MODULE(ruephy, miibus, ruephy_driver, ruephy_devclass, 0, 0); 78 79 static int ruephy_service(struct mii_softc *, struct mii_data *, int); 80 static void ruephy_reset(struct mii_softc *); 81 static void ruephy_status(struct mii_softc *); 82 83 /* 84 * The RealTek RTL8150 internal PHY doesn't have vendor/device ID 85 * registers; rue(4) fakes up a return value of all zeros. 86 */ 87 static const struct mii_phydesc ruephys[] = { 88 { 0, 0, "RealTek RTL8150 internal media interface" }, 89 MII_PHY_END 90 }; 91 92 static const struct mii_phy_funcs ruephy_funcs = { 93 ruephy_service, 94 ruephy_status, 95 ruephy_reset 96 }; 97 98 static int 99 ruephy_probe(device_t dev) 100 { 101 102 if (strcmp(device_get_name(device_get_parent(device_get_parent(dev))), 103 "rue") == 0) 104 return (mii_phy_dev_probe(dev, ruephys, BUS_PROBE_DEFAULT)); 105 return (ENXIO); 106 } 107 108 static int 109 ruephy_attach(device_t dev) 110 { 111 112 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 113 &ruephy_funcs, 1); 114 return (0); 115 } 116 117 static int 118 ruephy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 119 { 120 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 121 int reg; 122 123 switch (cmd) { 124 case MII_POLLSTAT: 125 break; 126 127 case MII_MEDIACHG: 128 mii_phy_setmedia(sc); 129 break; 130 131 case MII_TICK: 132 /* 133 * Only used for autonegotiation. 134 */ 135 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 136 break; 137 138 /* 139 * Check to see if we have link. If we do, we don't 140 * need to restart the autonegotiation process. Read 141 * the MSR twice in case it's latched. 142 */ 143 reg = PHY_READ(sc, RUEPHY_MII_MSR) | 144 PHY_READ(sc, RUEPHY_MII_MSR); 145 if (reg & RUEPHY_MSR_LINK) 146 break; 147 148 /* Only retry autonegotiation every mii_anegticks seconds. */ 149 if (sc->mii_ticks <= sc->mii_anegticks) 150 break; 151 152 sc->mii_ticks = 0; 153 PHY_RESET(sc); 154 if (mii_phy_auto(sc) == EJUSTRETURN) 155 return (0); 156 break; 157 } 158 159 /* Update the media status. */ 160 PHY_STATUS(sc); 161 162 /* Callback if something changed. */ 163 mii_phy_update(sc, cmd); 164 165 return (0); 166 } 167 168 static void 169 ruephy_reset(struct mii_softc *sc) 170 { 171 172 mii_phy_reset(sc); 173 174 /* 175 * XXX RealTek RTL8150 PHY doesn't set the BMCR properly after 176 * XXX reset, which breaks autonegotiation. 177 */ 178 PHY_WRITE(sc, MII_BMCR, (BMCR_S100 | BMCR_AUTOEN | BMCR_FDX)); 179 } 180 181 static void 182 ruephy_status(struct mii_softc *phy) 183 { 184 struct mii_data *mii = phy->mii_pdata; 185 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 186 int bmsr, bmcr, msr; 187 188 mii->mii_media_status = IFM_AVALID; 189 mii->mii_media_active = IFM_ETHER; 190 191 msr = PHY_READ(phy, RUEPHY_MII_MSR) | PHY_READ(phy, RUEPHY_MII_MSR); 192 if (msr & RUEPHY_MSR_LINK) 193 mii->mii_media_status |= IFM_ACTIVE; 194 195 bmcr = PHY_READ(phy, MII_BMCR); 196 if (bmcr & BMCR_ISO) { 197 mii->mii_media_active |= IFM_NONE; 198 mii->mii_media_status = 0; 199 return; 200 } 201 202 bmsr = PHY_READ(phy, MII_BMSR) | PHY_READ(phy, MII_BMSR); 203 if (bmcr & BMCR_AUTOEN) { 204 if ((bmsr & BMSR_ACOMP) == 0) { 205 /* Erg, still trying, I guess... */ 206 mii->mii_media_active |= IFM_NONE; 207 return; 208 } 209 210 if (msr & RUEPHY_MSR_SPEED100) 211 mii->mii_media_active |= IFM_100_TX; 212 else 213 mii->mii_media_active |= IFM_10_T; 214 215 if (msr & RUEPHY_MSR_DUPLEX) 216 mii->mii_media_active |= 217 IFM_FDX | mii_phy_flowstatus(phy); 218 else 219 mii->mii_media_active |= IFM_HDX; 220 } else 221 mii->mii_media_active = ife->ifm_media; 222 } 223