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__FBSDID("$FreeBSD: releng/12.0/sys/dev/mii/amphy.c 325966 2017-11-18 14:26:50Z pfg $"); 37 38/* 39 * driver for AMD AM79c873 PHYs 40 * This driver also works for Davicom DM910{1,2} PHYs, which appear 41 * to be AM79c873 workalikes. 42 */ 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/kernel.h> 47#include <sys/module.h> 48#include <sys/socket.h> 49#include <sys/bus.h> 50 51#include <net/if.h> 52#include <net/if_media.h> 53 54#include <dev/mii/mii.h> 55#include <dev/mii/miivar.h> 56#include "miidevs.h" 57 58#include <dev/mii/amphyreg.h> 59 60#include "miibus_if.h" 61 62static int amphy_probe(device_t); 63static int amphy_attach(device_t); 64 65static device_method_t amphy_methods[] = { 66 /* device interface */ 67 DEVMETHOD(device_probe, amphy_probe), 68 DEVMETHOD(device_attach, amphy_attach), 69 DEVMETHOD(device_detach, mii_phy_detach), 70 DEVMETHOD(device_shutdown, bus_generic_shutdown), 71 DEVMETHOD_END 72}; 73 74static devclass_t amphy_devclass; 75 76static driver_t amphy_driver = { 77 "amphy", 78 amphy_methods, 79 sizeof(struct mii_softc) 80}; 81 82DRIVER_MODULE(amphy, miibus, amphy_driver, amphy_devclass, 0, 0); 83 84static int amphy_service(struct mii_softc *, struct mii_data *, int); 85static void amphy_status(struct mii_softc *); 86 87static const struct mii_phydesc amphys[] = { 88 MII_PHY_DESC(xxDAVICOM, DM9102), 89 MII_PHY_DESC(xxDAVICOM, DM9101), 90 MII_PHY_DESC(yyDAVICOM, DM9101), 91 MII_PHY_END 92}; 93 94static const struct mii_phy_funcs amphy_funcs = { 95 amphy_service, 96 amphy_status, 97 mii_phy_reset 98}; 99 100static int 101amphy_probe(device_t dev) 102{ 103 104 return (mii_phy_dev_probe(dev, amphys, BUS_PROBE_DEFAULT)); 105} 106 107static int 108amphy_attach(device_t dev) 109{ 110 111 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &hy_funcs, 1); 112 return (0); 113} 114 115static int 116amphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 117{ 118 119 switch (cmd) { 120 case MII_POLLSTAT: 121 break; 122 123 case MII_MEDIACHG: 124 mii_phy_setmedia(sc); 125 break; 126 127 case MII_TICK: 128 if (mii_phy_tick(sc) == EJUSTRETURN) 129 return (0); 130 break; 131 } 132 133 /* Update the media status. */ 134 PHY_STATUS(sc); 135 136 /* Callback if something changed. */ 137 mii_phy_update(sc, cmd); 138 return (0); 139} 140 141static void 142amphy_status(struct mii_softc *sc) 143{ 144 struct mii_data *mii = sc->mii_pdata; 145 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 146 int bmsr, bmcr, par, anlpar; 147 148 mii->mii_media_status = IFM_AVALID; 149 mii->mii_media_active = IFM_ETHER; 150 151 bmsr = PHY_READ(sc, MII_BMSR) | 152 PHY_READ(sc, MII_BMSR); 153 if (bmsr & BMSR_LINK) 154 mii->mii_media_status |= IFM_ACTIVE; 155 156 bmcr = PHY_READ(sc, MII_BMCR); 157 if (bmcr & BMCR_ISO) { 158 mii->mii_media_active |= IFM_NONE; 159 mii->mii_media_status = 0; 160 return; 161 } 162 163 if (bmcr & BMCR_LOOP) 164 mii->mii_media_active |= IFM_LOOP; 165 166 if (bmcr & BMCR_AUTOEN) { 167 /* 168 * The PAR status bits are only valid if autonegotiation 169 * has completed (or it's disabled). 170 */ 171 if ((bmsr & BMSR_ACOMP) == 0) { 172 /* Erg, still trying, I guess... */ 173 mii->mii_media_active |= IFM_NONE; 174 return; 175 } 176 177 if (PHY_READ(sc, MII_ANER) & ANER_LPAN) { 178 anlpar = PHY_READ(sc, MII_ANAR) & 179 PHY_READ(sc, MII_ANLPAR); 180 if (anlpar & ANLPAR_TX_FD) 181 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 182 else if (anlpar & ANLPAR_T4) 183 mii->mii_media_active |= IFM_100_T4|IFM_HDX; 184 else if (anlpar & ANLPAR_TX) 185 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 186 else if (anlpar & ANLPAR_10_FD) 187 mii->mii_media_active |= IFM_10_T|IFM_FDX; 188 else if (anlpar & ANLPAR_10) 189 mii->mii_media_active |= IFM_10_T|IFM_HDX; 190 else 191 mii->mii_media_active |= IFM_NONE; 192 return; 193 } 194 195 /* 196 * Link partner is not capable of autonegotiation. 197 */ 198 par = PHY_READ(sc, MII_AMPHY_DSCSR); 199 if (par & DSCSR_100FDX) 200 mii->mii_media_active |= IFM_100_TX|IFM_FDX; 201 else if (par & DSCSR_100HDX) 202 mii->mii_media_active |= IFM_100_TX|IFM_HDX; 203 else if (par & DSCSR_10FDX) 204 mii->mii_media_active |= IFM_10_T|IFM_HDX; 205 else if (par & DSCSR_10HDX) 206 mii->mii_media_active |= IFM_10_T|IFM_HDX; 207 if ((mii->mii_media_active & IFM_FDX) != 0) 208 mii->mii_media_active |= mii_phy_flowstatus(sc); 209 } else 210 mii->mii_media_active = ife->ifm_media; 211} 212