1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 /* 29 * Driver for the SMSC LAN8710A 30 */ 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/socket.h> 36 #include <sys/errno.h> 37 #include <sys/module.h> 38 #include <sys/bus.h> 39 #include <sys/malloc.h> 40 41 #include <machine/bus.h> 42 43 #include <net/if.h> 44 #include <net/if_media.h> 45 46 #include <dev/mii/mii.h> 47 #include <dev/mii/miivar.h> 48 #include "miidevs.h" 49 50 #include "miibus_if.h" 51 52 static int smscphy_probe(device_t); 53 static int smscphy_attach(device_t); 54 55 static int smscphy_service(struct mii_softc *, struct mii_data *, int); 56 static void smscphy_auto(struct mii_softc *, int); 57 static void smscphy_status(struct mii_softc *); 58 59 static device_method_t smscphy_methods[] = { 60 /* device interface */ 61 DEVMETHOD(device_probe, smscphy_probe), 62 DEVMETHOD(device_attach, smscphy_attach), 63 DEVMETHOD(device_detach, mii_phy_detach), 64 DEVMETHOD(device_shutdown, bus_generic_shutdown), 65 DEVMETHOD_END 66 }; 67 68 static driver_t smscphy_driver = { 69 "smscphy", 70 smscphy_methods, 71 sizeof(struct mii_softc) 72 }; 73 74 DRIVER_MODULE(smscphy, miibus, smscphy_driver, 0, 0); 75 76 static const struct mii_phydesc smscphys[] = { 77 MII_PHY_DESC(SMC, LAN8710A), 78 MII_PHY_DESC(SMC, LAN8700), 79 MII_PHY_END 80 }; 81 82 static const struct mii_phy_funcs smscphy_funcs = { 83 smscphy_service, 84 smscphy_status, 85 mii_phy_reset 86 }; 87 88 static int 89 smscphy_probe(device_t dev) 90 { 91 92 return (mii_phy_dev_probe(dev, smscphys, BUS_PROBE_DEFAULT)); 93 } 94 95 static int 96 smscphy_attach(device_t dev) 97 { 98 struct mii_softc *sc; 99 const struct mii_phy_funcs *mpf; 100 101 sc = device_get_softc(dev); 102 mpf = &smscphy_funcs; 103 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1); 104 mii_phy_setmedia(sc); 105 106 return (0); 107 } 108 109 static int 110 smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 111 { 112 struct ifmedia_entry *ife; 113 int reg; 114 115 ife = mii->mii_media.ifm_cur; 116 117 switch (cmd) { 118 case MII_POLLSTAT: 119 break; 120 121 case MII_MEDIACHG: 122 switch (IFM_SUBTYPE(ife->ifm_media)) { 123 case IFM_AUTO: 124 smscphy_auto(sc, ife->ifm_media); 125 break; 126 127 default: 128 mii_phy_setmedia(sc); 129 break; 130 } 131 132 break; 133 134 case MII_TICK: 135 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 136 break; 137 } 138 139 /* I have no idea why BMCR_ISO gets set. */ 140 reg = PHY_READ(sc, MII_BMCR); 141 if (reg & BMCR_ISO) { 142 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 143 } 144 145 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 146 if (reg & BMSR_LINK) { 147 sc->mii_ticks = 0; 148 break; 149 } 150 151 if (++sc->mii_ticks <= MII_ANEGTICKS) { 152 break; 153 } 154 155 sc->mii_ticks = 0; 156 PHY_RESET(sc); 157 smscphy_auto(sc, ife->ifm_media); 158 break; 159 } 160 161 /* Update the media status. */ 162 PHY_STATUS(sc); 163 164 /* Callback if something changed. */ 165 mii_phy_update(sc, cmd); 166 return (0); 167 } 168 169 static void 170 smscphy_auto(struct mii_softc *sc, int media) 171 { 172 uint16_t anar; 173 174 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 175 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 176 anar |= ANAR_FC; 177 PHY_WRITE(sc, MII_ANAR, anar); 178 /* Apparently this helps. */ 179 anar = PHY_READ(sc, MII_ANAR); 180 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 181 } 182 183 static void 184 smscphy_status(struct mii_softc *sc) 185 { 186 struct mii_data *mii; 187 uint32_t bmcr, bmsr, status; 188 189 mii = sc->mii_pdata; 190 mii->mii_media_status = IFM_AVALID; 191 mii->mii_media_active = IFM_ETHER; 192 193 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 194 if ((bmsr & BMSR_LINK) != 0) 195 mii->mii_media_status |= IFM_ACTIVE; 196 197 bmcr = PHY_READ(sc, MII_BMCR); 198 if ((bmcr & BMCR_ISO) != 0) { 199 mii->mii_media_active |= IFM_NONE; 200 mii->mii_media_status = 0; 201 return; 202 } 203 204 if ((bmcr & BMCR_LOOP) != 0) 205 mii->mii_media_active |= IFM_LOOP; 206 207 if ((bmcr & BMCR_AUTOEN) != 0) { 208 if ((bmsr & BMSR_ACOMP) == 0) { 209 /* Erg, still trying, I guess... */ 210 mii->mii_media_active |= IFM_NONE; 211 return; 212 } 213 } 214 215 status = PHY_READ(sc, 0x1F); 216 if (status & 0x0008) 217 mii->mii_media_active |= IFM_100_TX; 218 else 219 mii->mii_media_active |= IFM_10_T; 220 if (status & 0x0010) 221 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 222 else 223 mii->mii_media_active |= IFM_HDX; 224 } 225