1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1997, 1998, 1999 5 * Bill Paul <wpaul@ee.columbia.edu>. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Bill Paul. 18 * 4. Neither the name of the author nor the names of any co-contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 32 * THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 /* 37 * driver for AMD AM79c873 PHYs 38 * This driver also works for Davicom DM910{1,2} PHYs, which appear 39 * to be AM79c873 workalikes. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/kernel.h> 45 #include <sys/module.h> 46 #include <sys/socket.h> 47 #include <sys/bus.h> 48 49 #include <net/if.h> 50 #include <net/if_media.h> 51 52 #include <dev/mii/mii.h> 53 #include <dev/mii/miivar.h> 54 #include "miidevs.h" 55 56 #include <dev/mii/amphyreg.h> 57 58 #include "miibus_if.h" 59 60 static int amphy_probe(device_t); 61 static int amphy_attach(device_t); 62 63 static device_method_t amphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, amphy_probe), 66 DEVMETHOD(device_attach, amphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 DEVMETHOD_END 70 }; 71 72 static driver_t amphy_driver = { 73 "amphy", 74 amphy_methods, 75 sizeof(struct mii_softc) 76 }; 77 78 DRIVER_MODULE(amphy, miibus, amphy_driver, 0, 0); 79 80 static int amphy_service(struct mii_softc *, struct mii_data *, int); 81 static void amphy_status(struct mii_softc *); 82 83 static const struct mii_phydesc amphys[] = { 84 MII_PHY_DESC(xxDAVICOM, DM9102), 85 MII_PHY_DESC(xxDAVICOM, DM9101), 86 MII_PHY_DESC(yyDAVICOM, DM9101), 87 MII_PHY_END 88 }; 89 90 static const struct mii_phy_funcs amphy_funcs = { 91 amphy_service, 92 amphy_status, 93 mii_phy_reset 94 }; 95 96 static int 97 amphy_probe(device_t dev) 98 { 99 100 return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT)); 101 } 102 103 static int 104 amphy_attach(device_t dev) 105 { 106 107 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &hy_funcs, 1); 108 return (0); 109 } 110 111 static int 112 amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 113 { 114 115 switch (cmd) { 116 case MII_POLLSTAT: 117 break; 118 119 case MII_MEDIACHG: 120 mii_phy_setmedia(sc); 121 break; 122 123 case MII_TICK: 124 if (mii_phy_tick(sc) == EJUSTRETURN) 125 return (0); 126 break; 127 } 128 129 /* Update the media status. */ 130 PHY_STATUS(sc); 131 132 /* Callback if something changed. */ 133 mii_phy_update(sc, cmd); 134 return (0); 135 } 136 137 static void 138 amphy_status(struct mii_softc *sc) 139 { 140 struct mii_data *mii = sc->mii_pdata; 141 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 142 int bmsr, bmcr, par, anlpar; 143 144 mii->mii_media_status = IFM_AVALID; 145 mii->mii_media_active = IFM_ETHER; 146 147 bmsr = PHY_READ(sc, MII_BMSR) | 148 PHY_READ(sc, MII_BMSR); 149 if (bmsr & BMSR_LINK) 150 mii->mii_media_status |= IFM_ACTIVE; 151 152 bmcr = PHY_READ(sc, MII_BMCR); 153 if (bmcr & BMCR_ISO) { 154 mii->mii_media_active |= IFM_NONE; 155 mii->mii_media_status = 0; 156 return; 157 } 158 159 if (bmcr & BMCR_LOOP) 160 mii->mii_media_active |= IFM_LOOP; 161 162 if (bmcr & BMCR_AUTOEN) { 163 /* 164 * The PAR status bits are only valid if autonegotiation 165 * has completed (or it's disabled). 166 */ 167 if ((bmsr & BMSR_ACOMP) == 0) { 168 /* Erg, still trying, I guess... */ 169 mii->mii_media_active |= IFM_NONE; 170 return; 171 } 172 173 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 174 anlpar = PHY_READ(sc, MII_ANAR) & 175 PHY_READ(sc, MII_ANLPAR); 176 if (anlpar & ANLPAR_TX_FD) 177 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 178 else if (anlpar & ANLPAR_T4) 179 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 180 else if (anlpar & ANLPAR_TX) 181 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 182 else if (anlpar & ANLPAR_10_FD) 183 mii->mii_media_active |= IFM_10_T|IFM_FDX; 184 else if (anlpar & ANLPAR_10) 185 mii->mii_media_active |= IFM_10_T|IFM_HDX; 186 else 187 mii->mii_media_active |= IFM_NONE; 188 return; 189 } 190 191 /* 192 * Link partner is not capable of autonegotiation. 193 */ 194 par = PHY_READ(sc, MII_AMPHY_DSCSR); 195 if (par & DSCSR_100FDX) 196 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 197 else if (par & DSCSR_100HDX) 198 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 199 else if (par & DSCSR_10FDX) 200 mii->mii_media_active |= IFM_10_T|IFM_HDX; 201 else if (par & DSCSR_10HDX) 202 mii->mii_media_active |= IFM_10_T|IFM_HDX; 203 if ((mii->mii_media_active & IFM_FDX) != 0) 204 mii->mii_media_active |= mii_phy_flowstatus(sc); 205 } else 206 mii->mii_media_active = ife->ifm_media; 207 } 208