1 /* $NetBSD: tqphy.c,v 1.36 2008/05/04 17:06:10 xtraeme 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 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by Manuel Bouyer. 47 * 4. The name of the author may not be used to endorse or promote products 48 * derived from this software without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 51 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 52 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 53 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 54 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 55 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 56 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 57 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 58 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 59 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 60 */ 61 62 /* 63 * TDK TSC78Q2120 PHY driver 64 * 65 * Documentation available at http://www.tsc.tdk.com/lan/78Q2120.pdf . 66 */ 67 68 #include <sys/cdefs.h> 69 __KERNEL_RCSID(0, "$NetBSD: tqphy.c,v 1.36 2008/05/04 17:06:10 xtraeme Exp $"); 70 71 #include <sys/param.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/device.h> 75 #include <sys/socket.h> 76 77 #include <net/if.h> 78 #include <net/if_media.h> 79 80 #include <dev/mii/mii.h> 81 #include <dev/mii/miivar.h> 82 #include <dev/mii/miidevs.h> 83 84 #include <dev/mii/tqphyreg.h> 85 86 static int tqphymatch(device_t, cfdata_t, void *); 87 static void tqphyattach(device_t, device_t, void *); 88 89 CFATTACH_DECL_NEW(tqphy, sizeof(struct mii_softc), 90 tqphymatch, tqphyattach, mii_phy_detach, mii_phy_activate); 91 92 static int tqphy_service(struct mii_softc *, struct mii_data *, int); 93 static void tqphy_status(struct mii_softc *); 94 95 static const struct mii_phy_funcs tqphy_funcs = { 96 tqphy_service, tqphy_status, mii_phy_reset, 97 }; 98 99 static const struct mii_phydesc tqphys[] = { 100 { MII_OUI_xxTSC, MII_MODEL_xxTSC_78Q2120, 101 MII_STR_xxTSC_78Q2120 }, 102 #if 0 103 { MII_OUI_xxTSC, MII_MODEL_TSC_78Q2121, 104 MII_STR_TSC_78Q2121 }, 105 #endif 106 { 0, 0, 107 NULL }, 108 }; 109 110 static int 111 tqphymatch(device_t parent, cfdata_t match, void *aux) 112 { 113 struct mii_attach_args *ma = aux; 114 115 if (mii_phy_match(ma, tqphys) != NULL) { 116 /* The DIAG register is unreliable on early revisions. */ 117 if (MII_MODEL(ma->mii_id2) == MII_MODEL_xxTSC_78Q2120 && 118 MII_REV(ma->mii_id2) <= 3) 119 return (0); 120 return (10); 121 } 122 123 return (0); 124 } 125 126 static void 127 tqphyattach(device_t parent, device_t self, void *aux) 128 { 129 struct mii_softc *sc = device_private(self); 130 struct mii_attach_args *ma = aux; 131 struct mii_data *mii = ma->mii_data; 132 const struct mii_phydesc *mpd; 133 134 mpd = mii_phy_match(ma, tqphys); 135 aprint_naive(": Media interface\n"); 136 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 137 138 sc->mii_dev = self; 139 sc->mii_inst = mii->mii_instance; 140 sc->mii_phy = ma->mii_phyno; 141 sc->mii_funcs = &tqphy_funcs; 142 sc->mii_pdata = mii; 143 sc->mii_flags = ma->mii_flags; 144 sc->mii_anegticks = MII_ANEGTICKS; 145 146 /* 147 * Apparently, we can't do loopback on this PHY. 148 */ 149 sc->mii_flags |= MIIF_NOLOOP; 150 151 PHY_RESET(sc); 152 153 sc->mii_capabilities = 154 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 155 aprint_normal_dev(self, ""); 156 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 157 aprint_error("no media present"); 158 else 159 mii_phy_add_media(sc); 160 aprint_normal("\n"); 161 162 if (!pmf_device_register(self, NULL, mii_phy_resume)) 163 aprint_error_dev(self, "couldn't establish power handler\n"); 164 } 165 166 static int 167 tqphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 168 { 169 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 170 int reg; 171 172 switch (cmd) { 173 case MII_POLLSTAT: 174 /* 175 * If we're not polling our PHY instance, just return. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 178 return (0); 179 break; 180 181 case MII_MEDIACHG: 182 /* 183 * If the media indicates a different PHY instance, 184 * isolate ourselves. 185 */ 186 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 187 reg = PHY_READ(sc, MII_BMCR); 188 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 189 return (0); 190 } 191 192 /* 193 * If the interface is not up, don't do anything. 194 */ 195 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 196 break; 197 198 mii_phy_setmedia(sc); 199 break; 200 201 case MII_TICK: 202 /* 203 * If we're not currently selected, just return. 204 */ 205 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 206 return (0); 207 208 if (mii_phy_tick(sc) == EJUSTRETURN) 209 return (0); 210 break; 211 212 case MII_DOWN: 213 mii_phy_down(sc); 214 return (0); 215 } 216 217 /* Update the media status. */ 218 mii_phy_status(sc); 219 220 /* Callback if something changed. */ 221 mii_phy_update(sc, cmd); 222 return (0); 223 } 224 225 static void 226 tqphy_status(struct mii_softc *sc) 227 { 228 struct mii_data *mii = sc->mii_pdata; 229 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 230 int bmsr, bmcr, diag; 231 232 mii->mii_media_status = IFM_AVALID; 233 mii->mii_media_active = IFM_ETHER; 234 235 bmsr = PHY_READ(sc, MII_BMSR) | 236 PHY_READ(sc, MII_BMSR); 237 if (bmsr & BMSR_LINK) 238 mii->mii_media_status |= IFM_ACTIVE; 239 240 bmcr = PHY_READ(sc, MII_BMCR); 241 if (bmcr & BMCR_ISO) { 242 mii->mii_media_active |= IFM_NONE; 243 mii->mii_media_status = 0; 244 return; 245 } 246 247 if (bmcr & BMCR_LOOP) 248 mii->mii_media_active |= IFM_LOOP; 249 250 if (bmcr & BMCR_AUTOEN) { 251 if ((bmsr & BMSR_ACOMP) == 0) { 252 /* Erg, still trying, I guess... */ 253 mii->mii_media_active |= IFM_NONE; 254 return; 255 } 256 diag = PHY_READ(sc, MII_TQPHY_DIAG); 257 if (diag & DIAG_RATE) 258 mii->mii_media_active |= IFM_100_TX; 259 else 260 mii->mii_media_active |= IFM_10_T; 261 if (diag & DIAG_DPLX) 262 mii->mii_media_active |= IFM_FDX; 263 } else 264 mii->mii_media_active = ife->ifm_media; 265 } 266