1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 /* 32 * Driver for the RDC Semiconductor R6040 10/100 PHY. 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/socket.h> 40 #include <sys/bus.h> 41 42 #include <net/if.h> 43 #include <net/if_media.h> 44 45 #include <dev/mii/mii.h> 46 #include <dev/mii/miivar.h> 47 #include "miidevs.h" 48 49 #include <dev/mii/rdcphyreg.h> 50 51 #include "miibus_if.h" 52 53 static device_probe_t rdcphy_probe; 54 static device_attach_t rdcphy_attach; 55 56 struct rdcphy_softc { 57 struct mii_softc mii_sc; 58 int mii_link_tick; 59 #define RDCPHY_MANNEG_TICK 3 60 }; 61 62 static device_method_t rdcphy_methods[] = { 63 /* device interface */ 64 DEVMETHOD(device_probe, rdcphy_probe), 65 DEVMETHOD(device_attach, rdcphy_attach), 66 DEVMETHOD(device_detach, mii_phy_detach), 67 DEVMETHOD(device_shutdown, bus_generic_shutdown), 68 DEVMETHOD_END 69 }; 70 71 static driver_t rdcphy_driver = { 72 "rdcphy", 73 rdcphy_methods, 74 sizeof(struct rdcphy_softc) 75 }; 76 77 DRIVER_MODULE(rdcphy, miibus, rdcphy_driver, 0, 0); 78 79 static int rdcphy_service(struct mii_softc *, struct mii_data *, int); 80 static void rdcphy_status(struct mii_softc *); 81 82 static const struct mii_phydesc rdcphys[] = { 83 MII_PHY_DESC(RDC, R6040), 84 MII_PHY_DESC(RDC, R6040_2), 85 MII_PHY_END 86 }; 87 88 static const struct mii_phy_funcs rdcphy_funcs = { 89 rdcphy_service, 90 rdcphy_status, 91 mii_phy_reset 92 }; 93 94 static int 95 rdcphy_probe(device_t dev) 96 { 97 98 return (mii_phy_dev_probe(dev, rdcphys, BUS_PROBE_DEFAULT)); 99 } 100 101 static int 102 rdcphy_attach(device_t dev) 103 { 104 105 mii_phy_dev_attach(dev, MIIF_NOMANPAUSE, &rdcphy_funcs, 1); 106 return (0); 107 } 108 109 static int 110 rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 111 { 112 struct rdcphy_softc *rsc; 113 struct ifmedia_entry *ife; 114 115 rsc = (struct rdcphy_softc *)sc; 116 ife = mii->mii_media.ifm_cur; 117 118 switch (cmd) { 119 case MII_POLLSTAT: 120 break; 121 122 case MII_MEDIACHG: 123 mii_phy_setmedia(sc); 124 switch (IFM_SUBTYPE(ife->ifm_media)) { 125 case IFM_100_TX: 126 case IFM_10_T: 127 /* 128 * Report fake lost link event to parent 129 * driver. This will stop MAC of parent 130 * driver and make it possible to reconfigure 131 * MAC after completion of link establishment. 132 * Note, the parent MAC seems to require 133 * restarting MAC when underlying any PHY 134 * configuration was changed even if the 135 * resolved speed/duplex was not changed at 136 * all. 137 */ 138 mii->mii_media_status = 0; 139 mii->mii_media_active = IFM_ETHER | IFM_NONE; 140 rsc->mii_link_tick = RDCPHY_MANNEG_TICK; 141 /* Immediately report link down. */ 142 mii_phy_update(sc, MII_MEDIACHG); 143 return (0); 144 default: 145 break; 146 } 147 break; 148 149 case MII_TICK: 150 if (mii_phy_tick(sc) == EJUSTRETURN) 151 return (0); 152 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 153 /* 154 * It seems the PHY hardware does not correctly 155 * report link status changes when manual link 156 * configuration is in progress. It is also 157 * possible for the PHY to complete establishing 158 * a link within one second such that mii(4) 159 * did not notice the link change. To workaround 160 * the issue, emulate lost link event and wait 161 * for 3 seconds when manual link configuration 162 * is in progress. 3 seconds would be long 163 * enough to absorb transient link flips. 164 */ 165 if (rsc->mii_link_tick > 0) { 166 rsc->mii_link_tick--; 167 return (0); 168 } 169 } 170 break; 171 } 172 173 /* Update the media status. */ 174 PHY_STATUS(sc); 175 176 /* Callback if something changed. */ 177 mii_phy_update(sc, cmd); 178 return (0); 179 } 180 181 static void 182 rdcphy_status(struct mii_softc *sc) 183 { 184 struct mii_data *mii; 185 int bmsr, bmcr, physts; 186 187 mii = sc->mii_pdata; 188 189 mii->mii_media_status = IFM_AVALID; 190 mii->mii_media_active = IFM_ETHER; 191 192 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 193 physts = PHY_READ(sc, MII_RDCPHY_STATUS); 194 195 if ((physts & STATUS_LINK_UP) != 0) 196 mii->mii_media_status |= IFM_ACTIVE; 197 198 bmcr = PHY_READ(sc, MII_BMCR); 199 if ((bmcr & BMCR_ISO) != 0) { 200 mii->mii_media_active |= IFM_NONE; 201 mii->mii_media_status = 0; 202 return; 203 } 204 205 if ((bmcr & BMCR_LOOP) != 0) 206 mii->mii_media_active |= IFM_LOOP; 207 208 if ((bmcr & BMCR_AUTOEN) != 0) { 209 if ((bmsr & BMSR_ACOMP) == 0) { 210 /* Erg, still trying, I guess... */ 211 mii->mii_media_active |= IFM_NONE; 212 return; 213 } 214 } 215 216 switch (physts & STATUS_SPEED_MASK) { 217 case STATUS_SPEED_100: 218 mii->mii_media_active |= IFM_100_TX; 219 break; 220 case STATUS_SPEED_10: 221 mii->mii_media_active |= IFM_10_T; 222 break; 223 default: 224 mii->mii_media_active |= IFM_NONE; 225 return; 226 } 227 if ((physts & STATUS_FULL_DUPLEX) != 0) 228 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 229 else 230 mii->mii_media_active |= IFM_HDX; 231 } 232