1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2010, Pyun YongHyeon <yongari@FreeBSD.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice unmodified, this list of conditions, and the following 12 * disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * Driver for the RDC Semiconductor R6040 10/100 PHY. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 #include <sys/socket.h> 42 #include <sys/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 <dev/mii/rdcphyreg.h> 52 53 #include "miibus_if.h" 54 55 static device_probe_t rdcphy_probe; 56 static device_attach_t rdcphy_attach; 57 58 struct rdcphy_softc { 59 struct mii_softc mii_sc; 60 int mii_link_tick; 61 #define RDCPHY_MANNEG_TICK 3 62 }; 63 64 static device_method_t rdcphy_methods[] = { 65 /* device interface */ 66 DEVMETHOD(device_probe, rdcphy_probe), 67 DEVMETHOD(device_attach, rdcphy_attach), 68 DEVMETHOD(device_detach, mii_phy_detach), 69 DEVMETHOD(device_shutdown, bus_generic_shutdown), 70 DEVMETHOD_END 71 }; 72 73 static devclass_t rdcphy_devclass; 74 75 static driver_t rdcphy_driver = { 76 "rdcphy", 77 rdcphy_methods, 78 sizeof(struct rdcphy_softc) 79 }; 80 81 DRIVER_MODULE(rdcphy, miibus, rdcphy_driver, rdcphy_devclass, 0, 0); 82 83 static int rdcphy_service(struct mii_softc *, struct mii_data *, int); 84 static void rdcphy_status(struct mii_softc *); 85 86 static const struct mii_phydesc rdcphys[] = { 87 MII_PHY_DESC(RDC, R6040), 88 MII_PHY_END 89 }; 90 91 static const struct mii_phy_funcs rdcphy_funcs = { 92 rdcphy_service, 93 rdcphy_status, 94 mii_phy_reset 95 }; 96 97 static int 98 rdcphy_probe(device_t dev) 99 { 100 101 return (mii_phy_dev_probe(dev, rdcphys, BUS_PROBE_DEFAULT)); 102 } 103 104 static int 105 rdcphy_attach(device_t dev) 106 { 107 108 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &rdcphy_funcs, 1); 109 return (0); 110 } 111 112 static int 113 rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 114 { 115 struct rdcphy_softc *rsc; 116 struct ifmedia_entry *ife; 117 118 rsc = (struct rdcphy_softc *)sc; 119 ife = mii->mii_media.ifm_cur; 120 121 switch (cmd) { 122 case MII_POLLSTAT: 123 break; 124 125 case MII_MEDIACHG: 126 mii_phy_setmedia(sc); 127 switch (IFM_SUBTYPE(ife->ifm_media)) { 128 case IFM_100_TX: 129 case IFM_10_T: 130 /* 131 * Report fake lost link event to parent 132 * driver. This will stop MAC of parent 133 * driver and make it possible to reconfigure 134 * MAC after completion of link establishment. 135 * Note, the parent MAC seems to require 136 * restarting MAC when underlying any PHY 137 * configuration was changed even if the 138 * resolved speed/duplex was not changed at 139 * all. 140 */ 141 mii->mii_media_status = 0; 142 mii->mii_media_active = IFM_ETHER | IFM_NONE; 143 rsc->mii_link_tick = RDCPHY_MANNEG_TICK; 144 /* Immediately report link down. */ 145 mii_phy_update(sc, MII_MEDIACHG); 146 return (0); 147 default: 148 break; 149 } 150 break; 151 152 case MII_TICK: 153 if (mii_phy_tick(sc) == EJUSTRETURN) 154 return (0); 155 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 156 /* 157 * It seems the PHY hardware does not correctly 158 * report link status changes when manual link 159 * configuration is in progress. It is also 160 * possible for the PHY to complete establishing 161 * a link within one second such that mii(4) 162 * did not notice the link change. To workaround 163 * the issue, emulate lost link event and wait 164 * for 3 seconds when manual link configuration 165 * is in progress. 3 seconds would be long 166 * enough to absorb transient link flips. 167 */ 168 if (rsc->mii_link_tick > 0) { 169 rsc->mii_link_tick--; 170 return (0); 171 } 172 } 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 rdcphy_status(struct mii_softc *sc) 186 { 187 struct mii_data *mii; 188 int bmsr, bmcr, physts; 189 190 mii = sc->mii_pdata; 191 192 mii->mii_media_status = IFM_AVALID; 193 mii->mii_media_active = IFM_ETHER; 194 195 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 196 physts = PHY_READ(sc, MII_RDCPHY_STATUS); 197 198 if ((physts & STATUS_LINK_UP) != 0) 199 mii->mii_media_status |= IFM_ACTIVE; 200 201 bmcr = PHY_READ(sc, MII_BMCR); 202 if ((bmcr & BMCR_ISO) != 0) { 203 mii->mii_media_active |= IFM_NONE; 204 mii->mii_media_status = 0; 205 return; 206 } 207 208 if ((bmcr & BMCR_LOOP) != 0) 209 mii->mii_media_active |= IFM_LOOP; 210 211 if ((bmcr & BMCR_AUTOEN) != 0) { 212 if ((bmsr & BMSR_ACOMP) == 0) { 213 /* Erg, still trying, I guess... */ 214 mii->mii_media_active |= IFM_NONE; 215 return; 216 } 217 } 218 219 switch (physts & STATUS_SPEED_MASK) { 220 case STATUS_SPEED_100: 221 mii->mii_media_active |= IFM_100_TX; 222 break; 223 case STATUS_SPEED_10: 224 mii->mii_media_active |= IFM_10_T; 225 break; 226 default: 227 mii->mii_media_active |= IFM_NONE; 228 return; 229 } 230 if ((physts & STATUS_FULL_DUPLEX) != 0) 231 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 232 else 233 mii->mii_media_active |= IFM_HDX; 234 } 235