1 /* $NetBSD: icsphy.c,v 1.56 2020/03/15 23:04:50 thorpej 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 /* 58 * driver for Integrated Circuit Systems' ICS1889-1893 ethernet 10/100 PHY 59 * datasheet from www.icst.com 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: icsphy.c,v 1.56 2020/03/15 23:04:50 thorpej Exp $"); 64 65 #include <sys/param.h> 66 #include <sys/systm.h> 67 #include <sys/kernel.h> 68 #include <sys/device.h> 69 #include <sys/socket.h> 70 71 #include <net/if.h> 72 #include <net/if_media.h> 73 74 #include <dev/mii/mii.h> 75 #include <dev/mii/miivar.h> 76 #include <dev/mii/miidevs.h> 77 78 #include <dev/mii/icsphyreg.h> 79 80 static int icsphymatch(device_t, cfdata_t, void *); 81 static void icsphyattach(device_t, device_t, void *); 82 83 CFATTACH_DECL_NEW(icsphy, sizeof(struct mii_softc), 84 icsphymatch, icsphyattach, mii_phy_detach, mii_phy_activate); 85 86 static int icsphy_service(struct mii_softc *, struct mii_data *, int); 87 static void icsphy_status(struct mii_softc *); 88 static void icsphy_reset(struct mii_softc *); 89 90 static const struct mii_phy_funcs icsphy_funcs = { 91 icsphy_service, icsphy_status, icsphy_reset, 92 }; 93 94 static const struct mii_phydesc icsphys[] = { 95 MII_PHY_DESC(ICS, 1889), 96 MII_PHY_DESC(ICS, 1890), 97 MII_PHY_DESC(ICS, 1892), 98 MII_PHY_DESC(ICS, 1893), 99 MII_PHY_DESC(ICS, 1893C), 100 MII_PHY_END, 101 }; 102 103 static int 104 icsphymatch(device_t parent, cfdata_t match, void *aux) 105 { 106 struct mii_attach_args *ma = aux; 107 108 if (mii_phy_match(ma, icsphys) != NULL) 109 return 10; 110 111 return 0; 112 } 113 114 static void 115 icsphyattach(device_t parent, device_t self, void *aux) 116 { 117 struct mii_softc *sc = device_private(self); 118 struct mii_attach_args *ma = aux; 119 struct mii_data *mii = ma->mii_data; 120 const struct mii_phydesc *mpd; 121 122 mpd = mii_phy_match(ma, icsphys); 123 aprint_naive(": Media interface\n"); 124 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 125 126 sc->mii_dev = self; 127 sc->mii_mpd_model = MII_MODEL(ma->mii_id2); 128 sc->mii_inst = mii->mii_instance; 129 sc->mii_phy = ma->mii_phyno; 130 sc->mii_funcs = &icsphy_funcs; 131 sc->mii_pdata = mii; 132 sc->mii_flags = ma->mii_flags; 133 134 mii_lock(mii); 135 136 PHY_RESET(sc); 137 138 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 139 sc->mii_capabilities &= ma->mii_capmask; 140 141 mii_unlock(mii); 142 143 mii_phy_add_media(sc); 144 } 145 146 static int 147 icsphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 148 { 149 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 150 uint16_t reg; 151 152 KASSERT(mii_locked(mii)); 153 154 switch (cmd) { 155 case MII_POLLSTAT: 156 /* If we're not polling our PHY instance, just return. */ 157 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 158 return 0; 159 break; 160 161 case MII_MEDIACHG: 162 /* 163 * If the media indicates a different PHY instance, 164 * isolate ourselves. 165 */ 166 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 167 PHY_READ(sc, MII_BMCR, ®); 168 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 169 return 0; 170 } 171 172 /* If the interface is not up, don't do anything. */ 173 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 174 break; 175 176 mii_phy_setmedia(sc); 177 break; 178 179 case MII_TICK: 180 /* If we're not currently selected, just return. */ 181 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 182 return 0; 183 184 if (mii_phy_tick(sc) == EJUSTRETURN) 185 return 0; 186 break; 187 188 case MII_DOWN: 189 mii_phy_down(sc); 190 return 0; 191 } 192 193 /* Update the media status. */ 194 mii_phy_status(sc); 195 196 /* Callback if something changed. */ 197 mii_phy_update(sc, cmd); 198 return 0; 199 } 200 201 static void 202 icsphy_status(struct mii_softc *sc) 203 { 204 struct mii_data *mii = sc->mii_pdata; 205 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 206 uint16_t bmcr, qpr; 207 208 KASSERT(mii_locked(mii)); 209 210 mii->mii_media_status = IFM_AVALID; 211 mii->mii_media_active = IFM_ETHER; 212 213 /* 214 * Don't get link from the BMSR. It's available in the QPR, 215 * and we have to read it twice to unlatch it anyhow. This 216 * gives us fewer register reads. 217 */ 218 PHY_READ(sc, MII_ICSPHY_QPR, &qpr); /* unlatch */ 219 PHY_READ(sc, MII_ICSPHY_QPR, &qpr); /* real value */ 220 221 if (qpr & QPR_LINK) 222 mii->mii_media_status |= IFM_ACTIVE; 223 224 PHY_READ(sc, MII_BMCR, &bmcr); 225 if (bmcr & BMCR_ISO) { 226 mii->mii_media_active |= IFM_NONE; 227 mii->mii_media_status = 0; 228 return; 229 } 230 231 if (bmcr & BMCR_LOOP) 232 mii->mii_media_active |= IFM_LOOP; 233 234 if (bmcr & BMCR_AUTOEN) { 235 if ((qpr & QPR_ACOMP) == 0) { 236 /* Erg, still trying, I guess... */ 237 mii->mii_media_active |= IFM_NONE; 238 return; 239 } 240 if (qpr & QPR_SPEED) 241 mii->mii_media_active |= IFM_100_TX; 242 else 243 mii->mii_media_active |= IFM_10_T; 244 245 if (qpr & QPR_FDX) 246 mii->mii_media_active |= IFM_FDX; 247 else 248 mii->mii_media_active |= IFM_HDX; 249 } else 250 mii->mii_media_active = ife->ifm_media; 251 } 252 253 static void 254 icsphy_reset(struct mii_softc *sc) 255 { 256 257 KASSERT(mii_locked(sc->mii_pdata)); 258 259 mii_phy_reset(sc); 260 /* Set powerdown feature */ 261 switch (sc->mii_mpd_model) { 262 case MII_MODEL_ICS_1890: 263 case MII_MODEL_ICS_1893: 264 PHY_WRITE(sc, MII_ICSPHY_ECR2, ECR2_100AUTOPWRDN); 265 break; 266 case MII_MODEL_ICS_1892: 267 PHY_WRITE(sc, MII_ICSPHY_ECR2, 268 ECR2_10AUTOPWRDN | ECR2_100AUTOPWRDN); 269 break; 270 default: 271 /* 1889 have no ECR2 */ 272 break; 273 } 274 /* 275 * There is no description that the reset do auto-negotiation in the 276 * data sheet. 277 */ 278 PHY_WRITE(sc, MII_BMCR, BMCR_S100 | BMCR_STARTNEG | BMCR_FDX); 279 } 280
Indexes created Mon Sep 22 13:09:51 GMT 2025