1 /* $NetBSD: sqphy.c,v 1.56 2020/03/15 23:04:50 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000, 2001 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 Seeq 80220/80221, 80223, and 80225 10/100 ethernet PHYs 59 * datasheet from www.seeq.com 60 */ 61 62 #include <sys/cdefs.h> 63 __KERNEL_RCSID(0, "$NetBSD: sqphy.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 #include <sys/errno.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 <dev/mii/miidevs.h> 78 79 #include <dev/mii/sqphyreg.h> 80 81 static int sqphymatch(device_t, cfdata_t, void *); 82 static void sqphyattach(device_t, device_t, void *); 83 84 CFATTACH_DECL_NEW(sqphy, sizeof(struct mii_softc), 85 sqphymatch, sqphyattach, mii_phy_detach, mii_phy_activate); 86 87 static int sqphy_service(struct mii_softc *, struct mii_data *, int); 88 static void sqphy_status(struct mii_softc *); 89 static void sqphy_84220_reset(struct mii_softc *); 90 91 static const struct mii_phy_funcs sqphy_funcs = { 92 sqphy_service, sqphy_status, mii_phy_reset, 93 }; 94 95 static const struct mii_phy_funcs sqphy_84220_funcs = { 96 sqphy_service, sqphy_status, sqphy_84220_reset, 97 }; 98 99 static const struct mii_phydesc sqphys[] = { 100 MII_PHY_DESC(SEEQ, 80220), 101 MII_PHY_DESC(SEEQ, 80225), 102 MII_PHY_DESC(SEEQ, 84220), 103 MII_PHY_END, 104 }; 105 106 static int 107 sqphymatch(device_t parent, cfdata_t match, void *aux) 108 { 109 struct mii_attach_args *ma = aux; 110 111 if (mii_phy_match(ma, sqphys) != NULL) 112 return 10; 113 114 return 0; 115 } 116 117 static void 118 sqphyattach(device_t parent, device_t self, void *aux) 119 { 120 struct mii_softc *sc = device_private(self); 121 struct mii_attach_args *ma = aux; 122 struct mii_data *mii = ma->mii_data; 123 const struct mii_phydesc *mpd; 124 125 mpd = mii_phy_match(ma, sqphys); 126 aprint_naive(": Media interface\n"); 127 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 128 129 sc->mii_dev = self; 130 sc->mii_inst = mii->mii_instance; 131 sc->mii_phy = ma->mii_phyno; 132 sc->mii_pdata = mii; 133 sc->mii_flags = ma->mii_flags; 134 135 switch (MII_MODEL(ma->mii_id2)) { 136 case MII_MODEL_SEEQ_84220: 137 sc->mii_funcs = &sqphy_84220_funcs; 138 aprint_normal_dev(self, 139 "using Seeq 84220 isolate/reset hack\n"); 140 break; 141 142 default: 143 sc->mii_funcs = &sqphy_funcs; 144 } 145 146 mii_lock(mii); 147 148 PHY_RESET(sc); 149 150 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 151 sc->mii_capabilities &= ma->mii_capmask; 152 153 mii_unlock(mii); 154 155 mii_phy_add_media(sc); 156 } 157 158 static int 159 sqphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 160 { 161 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 162 uint16_t reg; 163 164 KASSERT(mii_locked(mii)); 165 166 switch (cmd) { 167 case MII_POLLSTAT: 168 /* If we're not polling our PHY instance, just return. */ 169 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 170 return 0; 171 break; 172 173 case MII_MEDIACHG: 174 /* 175 * If the media indicates a different PHY instance, 176 * isolate ourselves. 177 */ 178 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 179 PHY_READ(sc, MII_BMCR, ®); 180 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 181 return 0; 182 } 183 184 /* If the interface is not up, don't do anything. */ 185 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 186 break; 187 188 mii_phy_setmedia(sc); 189 break; 190 191 case MII_TICK: 192 /* If we're not currently selected, just return. */ 193 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 194 return 0; 195 196 if (mii_phy_tick(sc) == EJUSTRETURN) 197 return 0; 198 break; 199 200 case MII_DOWN: 201 mii_phy_down(sc); 202 return 0; 203 } 204 205 /* Update the media status. */ 206 mii_phy_status(sc); 207 208 /* Callback if something changed. */ 209 mii_phy_update(sc, cmd); 210 return 0; 211 } 212 213 static void 214 sqphy_status(struct mii_softc *sc) 215 { 216 struct mii_data *mii = sc->mii_pdata; 217 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 218 uint16_t bmsr, bmcr, status; 219 220 KASSERT(mii_locked(mii)); 221 222 mii->mii_media_status = IFM_AVALID; 223 mii->mii_media_active = IFM_ETHER; 224 225 PHY_READ(sc, MII_BMSR, &bmsr); 226 PHY_READ(sc, MII_BMSR, &bmsr); 227 if (bmsr & BMSR_LINK) 228 mii->mii_media_status |= IFM_ACTIVE; 229 230 PHY_READ(sc, MII_BMCR, &bmcr); 231 if (bmcr & BMCR_ISO) { 232 mii->mii_media_active |= IFM_NONE; 233 mii->mii_media_status = 0; 234 return; 235 } 236 237 if (bmcr & BMCR_LOOP) 238 mii->mii_media_active |= IFM_LOOP; 239 240 if (bmcr & BMCR_AUTOEN) { 241 if ((bmsr & BMSR_ACOMP) == 0) { 242 /* Erg, still trying, I guess... */ 243 mii->mii_media_active |= IFM_NONE; 244 return; 245 } 246 /* 247 * Note: don't get fancy here -- the 80225 only supports the 248 * SPD_DET and DPLX_DET bits in the STATUS register. 249 */ 250 PHY_READ(sc, MII_SQPHY_STATUS, &status); 251 if (status & STATUS_SPD_DET) 252 mii->mii_media_active |= IFM_100_TX; 253 else 254 mii->mii_media_active |= IFM_10_T; 255 if (status & STATUS_DPLX_DET) 256 mii->mii_media_active |= IFM_FDX; 257 else 258 mii->mii_media_active |= IFM_HDX; 259 } else 260 mii->mii_media_active = ife->ifm_media; 261 } 262 263 static void 264 sqphy_84220_reset(struct mii_softc *sc) 265 { 266 uint16_t reg; 267 268 KASSERT(mii_locked(sc->mii_pdata)); 269 270 mii_phy_reset(sc); 271 272 /* 273 * This PHY sometimes insists on coming out of reset isolated, 274 * even when the MDA[0-3] pins are pulled high (to indicate 275 * PHY address 0), contrary to the device's datasheet. 276 * 277 * Morever, simply clearing BMCR_ISO here isn't enough; the 278 * change won't stick until about 30mS *after* the PHY has 279 * been reset. 280 * 281 * This sucks. 282 */ 283 if ((sc->mii_inst != 0) && ((sc->mii_flags & MIIF_NOISOLATE) == 0)) 284 return; 285 286 PHY_READ(sc, MII_BMCR, ®); 287 while ((reg & BMCR_ISO) != 0) { 288 delay(35000); 289 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 290 delay(35000); 291 PHY_READ(sc, MII_BMCR, ®); 292 } 293 } 294
Indexes created Sun Sep 21 20:09:37 GMT 2025