1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2006 Benno Rice. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * Driver for the SMSC LAN8710A 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/socket.h> 38 #include <sys/errno.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/malloc.h> 42 43 #include <machine/bus.h> 44 45 #include <net/if.h> 46 #include <net/if_media.h> 47 48 #include <dev/mii/mii.h> 49 #include <dev/mii/miivar.h> 50 #include "miidevs.h" 51 52 #include "miibus_if.h" 53 54 static int smscphy_probe(device_t); 55 static int smscphy_attach(device_t); 56 57 static int smscphy_service(struct mii_softc *, struct mii_data *, int); 58 static void smscphy_auto(struct mii_softc *, int); 59 static void smscphy_status(struct mii_softc *); 60 61 static device_method_t smscphy_methods[] = { 62 /* device interface */ 63 DEVMETHOD(device_probe, smscphy_probe), 64 DEVMETHOD(device_attach, smscphy_attach), 65 DEVMETHOD(device_detach, mii_phy_detach), 66 DEVMETHOD(device_shutdown, bus_generic_shutdown), 67 DEVMETHOD_END 68 }; 69 70 static driver_t smscphy_driver = { 71 "smscphy", 72 smscphy_methods, 73 sizeof(struct mii_softc) 74 }; 75 76 DRIVER_MODULE(smscphy, miibus, smscphy_driver, 0, 0); 77 78 static const struct mii_phydesc smscphys[] = { 79 MII_PHY_DESC(SMC, LAN8710A), 80 MII_PHY_DESC(SMC, LAN8700), 81 MII_PHY_END 82 }; 83 84 static const struct mii_phy_funcs smscphy_funcs = { 85 smscphy_service, 86 smscphy_status, 87 mii_phy_reset 88 }; 89 90 static int 91 smscphy_probe(device_t dev) 92 { 93 94 return (mii_phy_dev_probe(dev, smscphys, BUS_PROBE_DEFAULT)); 95 } 96 97 static int 98 smscphy_attach(device_t dev) 99 { 100 struct mii_softc *sc; 101 const struct mii_phy_funcs *mpf; 102 103 sc = device_get_softc(dev); 104 mpf = &smscphy_funcs; 105 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1); 106 mii_phy_setmedia(sc); 107 108 return (0); 109 } 110 111 static int 112 smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 113 { 114 struct ifmedia_entry *ife; 115 int reg; 116 117 ife = mii->mii_media.ifm_cur; 118 119 switch (cmd) { 120 case MII_POLLSTAT: 121 break; 122 123 case MII_MEDIACHG: 124 switch (IFM_SUBTYPE(ife->ifm_media)) { 125 case IFM_AUTO: 126 smscphy_auto(sc, ife->ifm_media); 127 break; 128 129 default: 130 mii_phy_setmedia(sc); 131 break; 132 } 133 134 break; 135 136 case MII_TICK: 137 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 138 break; 139 } 140 141 /* I have no idea why BMCR_ISO gets set. */ 142 reg = PHY_READ(sc, MII_BMCR); 143 if (reg & BMCR_ISO) { 144 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 145 } 146 147 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 148 if (reg & BMSR_LINK) { 149 sc->mii_ticks = 0; 150 break; 151 } 152 153 if (++sc->mii_ticks <= MII_ANEGTICKS) { 154 break; 155 } 156 157 sc->mii_ticks = 0; 158 PHY_RESET(sc); 159 smscphy_auto(sc, ife->ifm_media); 160 break; 161 } 162 163 /* Update the media status. */ 164 PHY_STATUS(sc); 165 166 /* Callback if something changed. */ 167 mii_phy_update(sc, cmd); 168 return (0); 169 } 170 171 static void 172 smscphy_auto(struct mii_softc *sc, int media) 173 { 174 uint16_t anar; 175 176 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 177 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 178 anar |= ANAR_FC; 179 PHY_WRITE(sc, MII_ANAR, anar); 180 /* Apparently this helps. */ 181 anar = PHY_READ(sc, MII_ANAR); 182 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 183 } 184 185 static void 186 smscphy_status(struct mii_softc *sc) 187 { 188 struct mii_data *mii; 189 uint32_t bmcr, bmsr, status; 190 191 mii = sc->mii_pdata; 192 mii->mii_media_status = IFM_AVALID; 193 mii->mii_media_active = IFM_ETHER; 194 195 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 196 if ((bmsr & BMSR_LINK) != 0) 197 mii->mii_media_status |= IFM_ACTIVE; 198 199 bmcr = PHY_READ(sc, MII_BMCR); 200 if ((bmcr & BMCR_ISO) != 0) { 201 mii->mii_media_active |= IFM_NONE; 202 mii->mii_media_status = 0; 203 return; 204 } 205 206 if ((bmcr & BMCR_LOOP) != 0) 207 mii->mii_media_active |= IFM_LOOP; 208 209 if ((bmcr & BMCR_AUTOEN) != 0) { 210 if ((bmsr & BMSR_ACOMP) == 0) { 211 /* Erg, still trying, I guess... */ 212 mii->mii_media_active |= IFM_NONE; 213 return; 214 } 215 } 216 217 status = PHY_READ(sc, 0x1F); 218 if (status & 0x0008) 219 mii->mii_media_active |= IFM_100_TX; 220 else 221 mii->mii_media_active |= IFM_10_T; 222 if (status & 0x0010) 223 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 224 else 225 mii->mii_media_active |= IFM_HDX; 226 } 227