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 /* 29 * Driver for the SEEQ 80220 and 84220. 30 * (Originally developed for the internal PHY on the SMSC LAN91C111.) 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/socket.h> 37 #include <sys/errno.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/malloc.h> 41 42 #include <machine/bus.h> 43 44 #include <net/if.h> 45 #include <net/if_media.h> 46 47 #include <dev/mii/mii.h> 48 #include <dev/mii/miivar.h> 49 #include "miidevs.h" 50 51 #include "miibus_if.h" 52 53 static int smcphy_probe(device_t); 54 static int smcphy_attach(device_t); 55 56 static int smcphy_service(struct mii_softc *, struct mii_data *, int); 57 static void smcphy_reset(struct mii_softc *); 58 static void smcphy_auto(struct mii_softc *, int); 59 static void smcphy_status(struct mii_softc *); 60 61 static device_method_t smcphy_methods[] = { 62 /* device interface */ 63 DEVMETHOD(device_probe, smcphy_probe), 64 DEVMETHOD(device_attach, smcphy_attach), 65 DEVMETHOD(device_detach, mii_phy_detach), 66 DEVMETHOD(device_shutdown, bus_generic_shutdown), 67 DEVMETHOD_END 68 }; 69 70 static driver_t smcphy_driver = { 71 "smcphy", 72 smcphy_methods, 73 sizeof(struct mii_softc) 74 }; 75 76 DRIVER_MODULE(smcphy, miibus, smcphy_driver, 0, 0); 77 78 static const struct mii_phydesc smcphys[] = { 79 MII_PHY_DESC(SEEQ, 80220), 80 MII_PHY_DESC(SEEQ, 84220), 81 MII_PHY_END 82 }; 83 84 static const struct mii_phy_funcs smcphy80220_funcs = { 85 smcphy_service, 86 smcphy_status, 87 mii_phy_reset 88 }; 89 90 static const struct mii_phy_funcs smcphy_funcs = { 91 smcphy_service, 92 smcphy_status, 93 smcphy_reset 94 }; 95 96 static int 97 smcphy_probe(device_t dev) 98 { 99 100 return (mii_phy_dev_probe(dev, smcphys, BUS_PROBE_DEFAULT)); 101 } 102 103 static int 104 smcphy_attach(device_t dev) 105 { 106 struct mii_softc *sc; 107 struct mii_attach_args *ma; 108 const struct mii_phy_funcs *mpf; 109 110 sc = device_get_softc(dev); 111 ma = device_get_ivars(dev); 112 if (MII_MODEL(ma->mii_id2) == MII_MODEL_SEEQ_80220) 113 mpf = &smcphy80220_funcs; 114 else 115 mpf = &smcphy_funcs; 116 mii_phy_dev_attach(dev, MIIF_NOISOLATE | MIIF_NOMANPAUSE, mpf, 1); 117 mii_phy_setmedia(sc); 118 119 return (0); 120 } 121 122 static int 123 smcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 124 { 125 struct ifmedia_entry *ife; 126 int reg; 127 128 ife = mii->mii_media.ifm_cur; 129 130 switch (cmd) { 131 case MII_POLLSTAT: 132 break; 133 134 case MII_MEDIACHG: 135 switch (IFM_SUBTYPE(ife->ifm_media)) { 136 case IFM_AUTO: 137 smcphy_auto(sc, ife->ifm_media); 138 break; 139 140 default: 141 mii_phy_setmedia(sc); 142 break; 143 } 144 145 break; 146 147 case MII_TICK: 148 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 149 break; 150 } 151 152 /* I have no idea why BMCR_ISO gets set. */ 153 reg = PHY_READ(sc, MII_BMCR); 154 if (reg & BMCR_ISO) { 155 PHY_WRITE(sc, MII_BMCR, reg & ~BMCR_ISO); 156 } 157 158 reg = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 159 if (reg & BMSR_LINK) { 160 sc->mii_ticks = 0; 161 break; 162 } 163 164 if (++sc->mii_ticks <= MII_ANEGTICKS) { 165 break; 166 } 167 168 sc->mii_ticks = 0; 169 PHY_RESET(sc); 170 smcphy_auto(sc, ife->ifm_media); 171 break; 172 } 173 174 /* Update the media status. */ 175 PHY_STATUS(sc); 176 177 /* Callback if something changed. */ 178 mii_phy_update(sc, cmd); 179 return (0); 180 } 181 182 static void 183 smcphy_reset(struct mii_softc *sc) 184 { 185 u_int bmcr; 186 int timeout; 187 188 PHY_WRITE(sc, MII_BMCR, BMCR_RESET); 189 190 for (timeout = 2; timeout > 0; timeout--) { 191 DELAY(50000); 192 bmcr = PHY_READ(sc, MII_BMCR); 193 if ((bmcr & BMCR_RESET) == 0) 194 break; 195 } 196 197 if (bmcr & BMCR_RESET) 198 device_printf(sc->mii_dev, "reset failed\n"); 199 200 PHY_WRITE(sc, MII_BMCR, 0x3000); 201 202 /* Mask interrupts, we poll instead. */ 203 PHY_WRITE(sc, 0x1e, 0xffc0); 204 } 205 206 static void 207 smcphy_auto(struct mii_softc *sc, int media) 208 { 209 uint16_t anar; 210 211 anar = BMSR_MEDIA_TO_ANAR(sc->mii_capabilities) | ANAR_CSMA; 212 if ((media & IFM_FLOW) != 0 || (sc->mii_flags & MIIF_FORCEPAUSE) != 0) 213 anar |= ANAR_FC; 214 PHY_WRITE(sc, MII_ANAR, anar); 215 /* Apparently this helps. */ 216 anar = PHY_READ(sc, MII_ANAR); 217 PHY_WRITE(sc, MII_BMCR, BMCR_AUTOEN | BMCR_STARTNEG); 218 } 219 220 static void 221 smcphy_status(struct mii_softc *sc) 222 { 223 struct mii_data *mii; 224 uint32_t bmcr, bmsr, status; 225 226 mii = sc->mii_pdata; 227 mii->mii_media_status = IFM_AVALID; 228 mii->mii_media_active = IFM_ETHER; 229 230 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 231 if ((bmsr & BMSR_LINK) != 0) 232 mii->mii_media_status |= IFM_ACTIVE; 233 234 bmcr = PHY_READ(sc, MII_BMCR); 235 if ((bmcr & BMCR_ISO) != 0) { 236 mii->mii_media_active |= IFM_NONE; 237 mii->mii_media_status = 0; 238 return; 239 } 240 241 if ((bmcr & BMCR_LOOP) != 0) 242 mii->mii_media_active |= IFM_LOOP; 243 244 if ((bmcr & BMCR_AUTOEN) != 0) { 245 if ((bmsr & BMSR_ACOMP) == 0) { 246 /* Erg, still trying, I guess... */ 247 mii->mii_media_active |= IFM_NONE; 248 return; 249 } 250 } 251 252 status = PHY_READ(sc, 0x12); 253 if (status & 0x0080) 254 mii->mii_media_active |= IFM_100_TX; 255 else 256 mii->mii_media_active |= IFM_10_T; 257 if (status & 0x0040) 258 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 259 else 260 mii->mii_media_active |= IFM_HDX; 261 } 262