1 /* $NetBSD: icsphy.c,v 1.41 2006/11/16 21:24:07 christos Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 11 * NASA Ames Research Center. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 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 THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 47 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 51 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 52 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 53 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 54 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 55 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 56 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59 #include <sys/cdefs.h> 60 __FBSDID("$FreeBSD$"); 61 62 /* 63 * driver for Integrated Circuit Systems' ICS1889-1893 ethernet 10/100 PHY 64 * datasheet from www.icst.com 65 */ 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/kernel.h> 70 #include <sys/module.h> 71 #include <sys/socket.h> 72 #include <sys/bus.h> 73 74 #include <net/if.h> 75 #include <net/if_media.h> 76 77 #include <dev/mii/mii.h> 78 #include <dev/mii/miivar.h> 79 #include "miidevs.h" 80 81 #include <dev/mii/icsphyreg.h> 82 83 #include "miibus_if.h" 84 85 static int icsphy_probe(device_t dev); 86 static int icsphy_attach(device_t dev); 87 88 static device_method_t icsphy_methods[] = { 89 /* device interface */ 90 DEVMETHOD(device_probe, icsphy_probe), 91 DEVMETHOD(device_attach, icsphy_attach), 92 DEVMETHOD(device_detach, mii_phy_detach), 93 DEVMETHOD(device_shutdown, bus_generic_shutdown), 94 DEVMETHOD_END 95 }; 96 97 static devclass_t icsphy_devclass; 98 99 static driver_t icsphy_driver = { 100 "icsphy", 101 icsphy_methods, 102 sizeof(struct mii_softc) 103 }; 104 105 DRIVER_MODULE(icsphy, miibus, icsphy_driver, icsphy_devclass, 0, 0); 106 107 static int icsphy_service(struct mii_softc *, struct mii_data *, int); 108 static void icsphy_status(struct mii_softc *); 109 static void icsphy_reset(struct mii_softc *); 110 111 static const struct mii_phydesc icsphys[] = { 112 MII_PHY_DESC(ICS, 1889), 113 MII_PHY_DESC(ICS, 1890), 114 MII_PHY_DESC(ICS, 1892), 115 MII_PHY_DESC(ICS, 1893), 116 MII_PHY_END 117 }; 118 119 static const struct mii_phy_funcs icsphy_funcs = { 120 icsphy_service, 121 icsphy_status, 122 icsphy_reset 123 }; 124 125 static int 126 icsphy_probe(device_t dev) 127 { 128 129 return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT)); 130 } 131 132 static int 133 icsphy_attach(device_t dev) 134 { 135 136 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 137 &icsphy_funcs, 1); 138 return (0); 139 } 140 141 static int 142 icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 143 { 144 145 switch (cmd) { 146 case MII_POLLSTAT: 147 break; 148 149 case MII_MEDIACHG: 150 mii_phy_setmedia(sc); 151 break; 152 153 case MII_TICK: 154 if (mii_phy_tick(sc) == EJUSTRETURN) 155 return (0); 156 break; 157 } 158 159 /* Update the media status. */ 160 PHY_STATUS(sc); 161 162 /* Callback if something changed. */ 163 mii_phy_update(sc, cmd); 164 return (0); 165 } 166 167 static void 168 icsphy_status(struct mii_softc *sc) 169 { 170 struct mii_data *mii = sc->mii_pdata; 171 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 172 int bmcr, qpr; 173 174 mii->mii_media_status = IFM_AVALID; 175 mii->mii_media_active = IFM_ETHER; 176 177 /* 178 * Don't get link from the BMSR. It's available in the QPR, 179 * and we have to read it twice to unlatch it anyhow. This 180 * gives us fewer register reads. 181 */ 182 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* unlatch */ 183 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* real value */ 184 185 if (qpr & QPR_LINK) 186 mii->mii_media_status |= IFM_ACTIVE; 187 188 bmcr = PHY_READ(sc, MII_BMCR); 189 if (bmcr & BMCR_ISO) { 190 mii->mii_media_active |= IFM_NONE; 191 mii->mii_media_status = 0; 192 return; 193 } 194 195 if (bmcr & BMCR_LOOP) 196 mii->mii_media_active |= IFM_LOOP; 197 198 if (bmcr & BMCR_AUTOEN) { 199 if ((qpr & QPR_ACOMP) == 0) { 200 /* Erg, still trying, I guess... */ 201 mii->mii_media_active |= IFM_NONE; 202 return; 203 } 204 if (qpr & QPR_SPEED) 205 mii->mii_media_active |= IFM_100_TX; 206 else 207 mii->mii_media_active |= IFM_10_T; 208 if (qpr & QPR_FDX) 209 mii->mii_media_active |= 210 IFM_FDX | mii_phy_flowstatus(sc); 211 else 212 mii->mii_media_active |= IFM_HDX; 213 } else 214 mii->mii_media_active = ife->ifm_media; 215 } 216 217 static void 218 icsphy_reset(struct mii_softc *sc) 219 { 220 221 mii_phy_reset(sc); 222 /* set powerdown feature */ 223 switch (sc->mii_mpd_model) { 224 case MII_MODEL_ICS_1890: 225 case MII_MODEL_ICS_1893: 226 PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN); 227 break; 228 case MII_MODEL_ICS_1892: 229 PHY_WRITE(sc, MII_ICSPHY_ECR2, 230 ECR2_10AUTOPWRDN|ECR2_100AUTOPWRDN); 231 break; 232 default: 233 /* 1889 have no ECR2 */ 234 break; 235 } 236 /* 237 * There is no description that the reset do auto-negotiation in the 238 * data sheet. 239 */ 240 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_STARTNEG|BMCR_FDX); 241 } 242