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 devclass_t smscphy_devclass; 71 72 static driver_t smscphy_driver = { 73 "smscphy", 74 smscphy_methods, 75 sizeof(struct mii_softc) 76 }; 77 78 DRIVER_MODULE(smscphy, miibus, smscphy_driver, smscphy_devclass, 0, 0); 79 80 static const struct mii_phydesc smscphys[] = { 81 MII_PHY_DESC(SMC, LAN8710A), 82 MII_PHY_DESC(SMC, LAN8700), 83 MII_PHY_END 84 }; 85 86 static const struct mii_phy_funcs smscphy_funcs = { 87 smscphy_service, 88 smscphy_status, 89 mii_phy_reset 90 }; 91 92 static int 93 smscphy_probe(device_t dev) 94 { 95 96 return (mii_phy_dev_probe(dev, smscphys, BUS_PROBE_DEFAULT)); 97 } 98 99 static int 100 smscphy_attach(device_t dev) 101 { 102 struct mii_softc *sc; 103 const struct mii_phy_funcs *mpf; 104 105 sc = device_get_softc(dev); 106 mpf = &smscphy_funcs; 107 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1); 108 mii_phy_setmedia(sc); 109 110 return (0); 111 } 112 113 static int 114 smscphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 115 { 116 struct ifmedia_entry *ife; 117 int reg; 118 119 ife = mii->mii_media.ifm_cur; 120 121 switch (cmd) { 122 case MII_POLLSTAT: 123 break; 124 125 case MII_MEDIACHG: 126 switch (IFM_SUBTYPE(ife->ifm_media)) { 127 case IFM_AUTO: 128 smscphy_auto(sc, ife->ifm_media); 129 break; 130 131 default: 132 mii_phy_setmedia(sc); 133 break; 134 } 135 136 break; 137 138 case MII_TICK: 139 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 140 break; 141 } 142 143 /* I have no idea why BMCR_ISO gets set. */ 144 reg = PHY_READ(sc, MII_BMCR); 145 if (reg & BMCR_ISO) { 146 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 147 } 148 149 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 150 if (reg & BMSR_LINK) { 151 sc->mii_ticks = 0; 152 break; 153 } 154 155 if (++sc->mii_ticks <= MII_ANEGTICKS) { 156 break; 157 } 158 159 sc->mii_ticks = 0; 160 PHY_RESET(sc); 161 smscphy_auto(sc, ife->ifm_media); 162 break; 163 } 164 165 /* Update the media status. */ 166 PHY_STATUS(sc); 167 168 /* Callback if something changed. */ 169 mii_phy_update(sc, cmd); 170 return (0); 171 } 172 173 static void 174 smscphy_auto(struct mii_softc *sc, int media) 175 { 176 uint16_t anar; 177 178 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 179 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 180 anar |= ANAR_FC; 181 PHY_WRITE(sc, MII_ANAR, anar); 182 /* Apparently this helps. */ 183 anar = PHY_READ(sc, MII_ANAR); 184 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 185 } 186 187 static void 188 smscphy_status(struct mii_softc *sc) 189 { 190 struct mii_data *mii; 191 uint32_t bmcr, bmsr, status; 192 193 mii = sc->mii_pdata; 194 mii->mii_media_status = IFM_AVALID; 195 mii->mii_media_active = IFM_ETHER; 196 197 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 198 if ((bmsr & BMSR_LINK) != 0) 199 mii->mii_media_status |= IFM_ACTIVE; 200 201 bmcr = PHY_READ(sc, MII_BMCR); 202 if ((bmcr & BMCR_ISO) != 0) { 203 mii->mii_media_active |= IFM_NONE; 204 mii->mii_media_status = 0; 205 return; 206 } 207 208 if ((bmcr & BMCR_LOOP) != 0) 209 mii->mii_media_active |= IFM_LOOP; 210 211 if ((bmcr & BMCR_AUTOEN) != 0) { 212 if ((bmsr & BMSR_ACOMP) == 0) { 213 /* Erg, still trying, I guess... */ 214 mii->mii_media_active |= IFM_NONE; 215 return; 216 } 217 } 218 219 status = PHY_READ(sc, 0x1F); 220 if (status & 0x0008) 221 mii->mii_media_active |= IFM_100_TX; 222 else 223 mii->mii_media_active |= IFM_10_T; 224 if (status & 0x0010) 225 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 226 else 227 mii->mii_media_active |= IFM_HDX; 228 } 229