1 /* $NetBSD: icsphy.c,v 1.41 2006/11/16 21:24:07 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 #include <sys/cdefs.h> 58 __FBSDID("$FreeBSD$"); 59 60 /* 61 * driver for Integrated Circuit Systems' ICS1889-1893 ethernet 10/100 PHY 62 * datasheet from www.icst.com 63 */ 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/module.h> 69 #include <sys/socket.h> 70 #include <sys/bus.h> 71 72 #include <net/if.h> 73 #include <net/if_media.h> 74 75 #include <dev/mii/mii.h> 76 #include <dev/mii/miivar.h> 77 #include "miidevs.h" 78 79 #include <dev/mii/icsphyreg.h> 80 81 #include "miibus_if.h" 82 83 static int icsphy_probe(device_t dev); 84 static int icsphy_attach(device_t dev); 85 86 static device_method_t icsphy_methods[] = { 87 /* device interface */ 88 DEVMETHOD(device_probe, icsphy_probe), 89 DEVMETHOD(device_attach, icsphy_attach), 90 DEVMETHOD(device_detach, mii_phy_detach), 91 DEVMETHOD(device_shutdown, bus_generic_shutdown), 92 DEVMETHOD_END 93 }; 94 95 static devclass_t icsphy_devclass; 96 97 static driver_t icsphy_driver = { 98 "icsphy", 99 icsphy_methods, 100 sizeof(struct mii_softc) 101 }; 102 103 DRIVER_MODULE(icsphy, miibus, icsphy_driver, icsphy_devclass, 0, 0); 104 105 static int icsphy_service(struct mii_softc *, struct mii_data *, int); 106 static void icsphy_status(struct mii_softc *); 107 static void icsphy_reset(struct mii_softc *); 108 109 static const struct mii_phydesc icsphys[] = { 110 MII_PHY_DESC(ICS, 1889), 111 MII_PHY_DESC(ICS, 1890), 112 MII_PHY_DESC(ICS, 1892), 113 MII_PHY_DESC(ICS, 1893), 114 MII_PHY_END 115 }; 116 117 static const struct mii_phy_funcs icsphy_funcs = { 118 icsphy_service, 119 icsphy_status, 120 icsphy_reset 121 }; 122 123 static int 124 icsphy_probe(device_t dev) 125 { 126 127 return (mii_phy_dev_probe(dev, icsphys, BUS_PROBE_DEFAULT)); 128 } 129 130 static int 131 icsphy_attach(device_t dev) 132 { 133 134 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, 135 &icsphy_funcs, 1); 136 return (0); 137 } 138 139 static int 140 icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 141 { 142 143 switch (cmd) { 144 case MII_POLLSTAT: 145 break; 146 147 case MII_MEDIACHG: 148 /* 149 * If the interface is not up, don't do anything. 150 */ 151 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 152 break; 153 154 mii_phy_setmedia(sc); 155 break; 156 157 case MII_TICK: 158 if (mii_phy_tick(sc) == EJUSTRETURN) 159 return (0); 160 break; 161 } 162 163 /* Update the media status. */ 164 PHY_STATUS(sc); 165 166 /* Callback if something changed. */ 167 mii_phy_update(sc, cmd); 168 return (0); 169 } 170 171 static void 172 icsphy_status(struct mii_softc *sc) 173 { 174 struct mii_data *mii = sc->mii_pdata; 175 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 176 int bmcr, qpr; 177 178 mii->mii_media_status = IFM_AVALID; 179 mii->mii_media_active = IFM_ETHER; 180 181 /* 182 * Don't get link from the BMSR. It's available in the QPR, 183 * and we have to read it twice to unlatch it anyhow. This 184 * gives us fewer register reads. 185 */ 186 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* unlatch */ 187 qpr = PHY_READ(sc, MII_ICSPHY_QPR); /* real value */ 188 189 if (qpr & QPR_LINK) 190 mii->mii_media_status |= IFM_ACTIVE; 191 192 bmcr = PHY_READ(sc, MII_BMCR); 193 if (bmcr & BMCR_ISO) { 194 mii->mii_media_active |= IFM_NONE; 195 mii->mii_media_status = 0; 196 return; 197 } 198 199 if (bmcr & BMCR_LOOP) 200 mii->mii_media_active |= IFM_LOOP; 201 202 if (bmcr & BMCR_AUTOEN) { 203 if ((qpr & QPR_ACOMP) == 0) { 204 /* Erg, still trying, I guess... */ 205 mii->mii_media_active |= IFM_NONE; 206 return; 207 } 208 if (qpr & QPR_SPEED) 209 mii->mii_media_active |= IFM_100_TX; 210 else 211 mii->mii_media_active |= IFM_10_T; 212 if (qpr & QPR_FDX) 213 mii->mii_media_active |= 214 IFM_FDX | mii_phy_flowstatus(sc); 215 else 216 mii->mii_media_active |= IFM_HDX; 217 } else 218 mii->mii_media_active = ife->ifm_media; 219 } 220 221 static void 222 icsphy_reset(struct mii_softc *sc) 223 { 224 225 mii_phy_reset(sc); 226 /* set powerdown feature */ 227 switch (sc->mii_mpd_model) { 228 case MII_MODEL_ICS_1890: 229 case MII_MODEL_ICS_1893: 230 PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN); 231 break; 232 case MII_MODEL_ICS_1892: 233 PHY_WRITE(sc, MII_ICSPHY_ECR2, 234 ECR2_10AUTOPWRDN|ECR2_100AUTOPWRDN); 235 break; 236 default: 237 /* 1889 have no ECR2 */ 238 break; 239 } 240 /* 241 * There is no description that the reset do auto-negotiation in the 242 * data sheet. 243 */ 244 PHY_WRITE(sc, MII_BMCR, BMCR_S100|BMCR_STARTNEG|BMCR_FDX); 245 } 246