1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2006 Benno Rice. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * Driver for the SEEQ 80220 and 84220. 32 * (Originally developed for the internal PHY on the SMSC LAN91C111.) 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/socket.h> 39 #include <sys/errno.h> 40 #include <sys/module.h> 41 #include <sys/bus.h> 42 #include <sys/malloc.h> 43 44 #include <machine/bus.h> 45 46 #include <net/if.h> 47 #include <net/if_media.h> 48 49 #include <dev/mii/mii.h> 50 #include <dev/mii/miivar.h> 51 #include "miidevs.h" 52 53 #include "miibus_if.h" 54 55 static int smcphy_probe(device_t); 56 static int smcphy_attach(device_t); 57 58 static int smcphy_service(struct mii_softc *, struct mii_data *, int); 59 static void smcphy_reset(struct mii_softc *); 60 static void smcphy_auto(struct mii_softc *, int); 61 static void smcphy_status(struct mii_softc *); 62 63 static device_method_t smcphy_methods[] = { 64 /* device interface */ 65 DEVMETHOD(device_probe, smcphy_probe), 66 DEVMETHOD(device_attach, smcphy_attach), 67 DEVMETHOD(device_detach, mii_phy_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 DEVMETHOD_END 70 }; 71 72 static driver_t smcphy_driver = { 73 "smcphy", 74 smcphy_methods, 75 sizeof(struct mii_softc) 76 }; 77 78 DRIVER_MODULE(smcphy, miibus, smcphy_driver, 0, 0); 79 80 static const struct mii_phydesc smcphys[] = { 81 MII_PHY_DESC(SEEQ, 80220), 82 MII_PHY_DESC(SEEQ, 84220), 83 MII_PHY_END 84 }; 85 86 static const struct mii_phy_funcs smcphy80220_funcs = { 87 smcphy_service, 88 smcphy_status, 89 mii_phy_reset 90 }; 91 92 static const struct mii_phy_funcs smcphy_funcs = { 93 smcphy_service, 94 smcphy_status, 95 smcphy_reset 96 }; 97 98 static int 99 smcphy_probe(device_t dev) 100 { 101 102 return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT)); 103 } 104 105 static int 106 smcphy_attach(device_t dev) 107 { 108 struct mii_softc *sc; 109 struct mii_attach_args *ma; 110 const struct mii_phy_funcs *mpf; 111 112 sc = device_get_softc(dev); 113 ma = device_get_ivars(dev); 114 if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220) 115 mpf = &smcphy80220_funcs; 116 else 117 mpf = &smcphy_funcs; 118 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1); 119 mii_phy_setmedia(sc); 120 121 return (0); 122 } 123 124 static int 125 smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 126 { 127 struct ifmedia_entry *ife; 128 int reg; 129 130 ife = mii->mii_media.ifm_cur; 131 132 switch (cmd) { 133 case MII_POLLSTAT: 134 break; 135 136 case MII_MEDIACHG: 137 switch (IFM_SUBTYPE(ife->ifm_media)) { 138 case IFM_AUTO: 139 smcphy_auto(sc, ife->ifm_media); 140 break; 141 142 default: 143 mii_phy_setmedia(sc); 144 break; 145 } 146 147 break; 148 149 case MII_TICK: 150 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 151 break; 152 } 153 154 /* I have no idea why BMCR_ISO gets set. */ 155 reg = PHY_READ(sc, MII_BMCR); 156 if (reg & BMCR_ISO) { 157 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 158 } 159 160 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 161 if (reg & BMSR_LINK) { 162 sc->mii_ticks = 0; 163 break; 164 } 165 166 if (++sc->mii_ticks <= MII_ANEGTICKS) { 167 break; 168 } 169 170 sc->mii_ticks = 0; 171 PHY_RESET(sc); 172 smcphy_auto(sc, ife->ifm_media); 173 break; 174 } 175 176 /* Update the media status. */ 177 PHY_STATUS(sc); 178 179 /* Callback if something changed. */ 180 mii_phy_update(sc, cmd); 181 return (0); 182 } 183 184 static void 185 smcphy_reset(struct mii_softc *sc) 186 { 187 u_int bmcr; 188 int timeout; 189 190 PHY_WRITE(sc, MII_BMCR, BMCR_RESET); 191 192 for (timeout = 2; timeout > 0; timeout--) { 193 DELAY(50000); 194 bmcr = PHY_READ(sc, MII_BMCR); 195 if ((bmcr & BMCR_RESET) == 0) 196 break; 197 } 198 199 if (bmcr & BMCR_RESET) 200 device_printf(sc->mii_dev, "reset failed\n"); 201 202 PHY_WRITE(sc, MII_BMCR, 0x3000); 203 204 /* Mask interrupts, we poll instead. */ 205 PHY_WRITE(sc, 0x1e, 0xffc0); 206 } 207 208 static void 209 smcphy_auto(struct mii_softc *sc, int media) 210 { 211 uint16_t anar; 212 213 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 214 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 215 anar |= ANAR_FC; 216 PHY_WRITE(sc, MII_ANAR, anar); 217 /* Apparently this helps. */ 218 anar = PHY_READ(sc, MII_ANAR); 219 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 220 } 221 222 static void 223 smcphy_status(struct mii_softc *sc) 224 { 225 struct mii_data *mii; 226 uint32_t bmcr, bmsr, status; 227 228 mii = sc->mii_pdata; 229 mii->mii_media_status = IFM_AVALID; 230 mii->mii_media_active = IFM_ETHER; 231 232 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 233 if ((bmsr & BMSR_LINK) != 0) 234 mii->mii_media_status |= IFM_ACTIVE; 235 236 bmcr = PHY_READ(sc, MII_BMCR); 237 if ((bmcr & BMCR_ISO) != 0) { 238 mii->mii_media_active |= IFM_NONE; 239 mii->mii_media_status = 0; 240 return; 241 } 242 243 if ((bmcr & BMCR_LOOP) != 0) 244 mii->mii_media_active |= IFM_LOOP; 245 246 if ((bmcr & BMCR_AUTOEN) != 0) { 247 if ((bmsr & BMSR_ACOMP) == 0) { 248 /* Erg, still trying, I guess... */ 249 mii->mii_media_active |= IFM_NONE; 250 return; 251 } 252 } 253 254 status = PHY_READ(sc, 0x12); 255 if (status & 0x0080) 256 mii->mii_media_active |= IFM_100_TX; 257 else 258 mii->mii_media_active |= IFM_10_T; 259 if (status & 0x0040) 260 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 261 else 262 mii->mii_media_active |= IFM_HDX; 263 } 264