1 /* $NetBSD: rdcphy.c,v 1.4 2019/03/25 09:20:46 msaitoh Exp $ */ 2 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 /* FreeBSD: src/sys/dev/mii/rdcphy.c,v 1.1 2010/12/30 23:50:25 yongari Exp */ 31 32 /* 33 * Driver for the RDC Semiconductor R6040 10/100 PHY. 34 */ 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: rdcphy.c,v 1.4 2019/03/25 09:20:46 msaitoh Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <sys/socket.h> 43 #include <sys/errno.h> 44 45 #include <sys/bus.h> 46 47 #include <net/if.h> 48 #include <net/if_media.h> 49 50 #include <dev/mii/mii.h> 51 #include <dev/mii/miivar.h> 52 #include <dev/mii/miidevs.h> 53 54 #include <dev/mii/rdcphyreg.h> 55 56 struct rdcphy_softc { 57 struct mii_softc sc_mii; 58 int sc_mii_link_tick; 59 #define RDCPHY_MANNEG_TICK 3 60 }; 61 62 static int rdcphymatch(device_t, cfdata_t, void *); 63 static void rdcphyattach(device_t, device_t, void *); 64 65 CFATTACH_DECL_NEW(rdcphy, sizeof(struct rdcphy_softc), 66 rdcphymatch, rdcphyattach, mii_phy_detach, mii_phy_activate); 67 68 69 static int rdcphy_service(struct mii_softc *, struct mii_data *, int); 70 static void rdcphy_status(struct mii_softc *); 71 72 static const struct mii_phy_funcs rdcphy_funcs = { 73 rdcphy_service, rdcphy_status, mii_phy_reset, 74 }; 75 76 static const struct mii_phydesc rdcphys[] = { 77 MII_PHY_DESC(RDC, R6040), 78 MII_PHY_END, 79 }; 80 81 static int 82 rdcphymatch(device_t parent, cfdata_t match, void *aux) 83 { 84 struct mii_attach_args *ma = aux; 85 86 if (mii_phy_match(ma, rdcphys) != NULL) 87 return 10; 88 89 return 0; 90 } 91 92 static void 93 rdcphyattach(device_t parent, device_t self, void *aux) 94 { 95 struct rdcphy_softc *rsc = device_private(self); 96 struct mii_softc *sc = &rsc->sc_mii; 97 struct mii_attach_args *ma = aux; 98 struct mii_data *mii = ma->mii_data; 99 100 const struct mii_phydesc *mpd; 101 102 mpd = mii_phy_match(ma, rdcphys); 103 aprint_naive(": Media interface\n"); 104 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, MII_REV(ma->mii_id2)); 105 106 sc->mii_dev = self; 107 sc->mii_inst = mii->mii_instance; 108 sc->mii_phy = ma->mii_phyno; 109 sc->mii_funcs = &rdcphy_funcs; 110 sc->mii_pdata = mii; 111 sc->mii_flags = ma->mii_flags; 112 sc->mii_anegticks = MII_ANEGTICKS; 113 114 PHY_RESET(sc); 115 116 PHY_READ(sc, MII_BMSR, &sc->mii_capabilities); 117 sc->mii_capabilities &= ma->mii_capmask; 118 if (sc->mii_capabilities & BMSR_EXTSTAT) 119 PHY_READ(sc, MII_EXTSR, &sc->mii_extcapabilities); 120 aprint_normal_dev(self, ""); 121 mii_phy_add_media(sc); 122 aprint_normal("\n"); 123 124 if (!pmf_device_register(self, NULL, mii_phy_resume)) 125 aprint_error_dev(self, "couldn't establish power handler\n"); 126 127 } 128 129 static int 130 rdcphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 131 { 132 struct rdcphy_softc *rsc = (struct rdcphy_softc *)sc; 133 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 134 135 switch (cmd) { 136 case MII_POLLSTAT: 137 break; 138 139 case MII_MEDIACHG: 140 /* If the interface is not up, don't do anything. */ 141 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 142 break; 143 144 mii_phy_setmedia(sc); 145 switch (IFM_SUBTYPE(ife->ifm_media)) { 146 case IFM_100_TX: 147 case IFM_10_T: 148 /* 149 * Report fake lost link event to parent driver. This 150 * will stop MAC of parent driver and make it possible 151 * to reconfigure MAC after completion of link 152 * establishment. 153 * Note, the parent MAC seems to require restarting MAC 154 * when underlying any PHY configuration was changed 155 * even if the resolved speed/duplex was not changed at 156 * all. 157 */ 158 mii->mii_media_status = 0; 159 mii->mii_media_active = IFM_ETHER | IFM_NONE; 160 rsc->sc_mii_link_tick = RDCPHY_MANNEG_TICK; 161 /* Immediately report link down. */ 162 mii_phy_update(sc, MII_MEDIACHG); 163 return 0; 164 default: 165 break; 166 } 167 break; 168 169 case MII_TICK: 170 if (mii_phy_tick(sc) == EJUSTRETURN) 171 return 0; 172 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) { 173 /* 174 * It seems the PHY hardware does not correctly report 175 * link status changes when manual link configuration 176 * is in progress. It is also possible for the PHY to 177 * complete establishing a link within one second such 178 * that mii(4) did not notice the link change. 179 * To workaround the issue, emulate lost link event and 180 * wait for 3 seconds when manual link configuration 181 * is in progress. 3 seconds would be long enough to 182 * absorb transient link flips. 183 */ 184 if (rsc->sc_mii_link_tick > 0) { 185 rsc->sc_mii_link_tick--; 186 return 0; 187 } 188 } 189 break; 190 } 191 192 /* Update the media status. */ 193 rdcphy_status(sc); 194 195 /* Callback if something changed. */ 196 mii_phy_update(sc, cmd); 197 return 0; 198 } 199 200 static void 201 rdcphy_status(struct mii_softc *sc) 202 { 203 struct mii_data *mii = sc->mii_pdata; 204 uint16_t bmsr, bmcr, physts; 205 206 mii->mii_media_status = IFM_AVALID; 207 mii->mii_media_active = IFM_ETHER; 208 209 PHY_READ(sc, MII_BMSR, &bmsr); 210 PHY_READ(sc, MII_BMSR, &bmsr); 211 PHY_READ(sc, MII_RDCPHY_STATUS, &physts); 212 213 if ((physts & STATUS_LINK_UP) != 0) 214 mii->mii_media_status |= IFM_ACTIVE; 215 216 PHY_READ(sc, MII_BMCR, &bmcr); 217 if ((bmcr & BMCR_ISO) != 0) { 218 mii->mii_media_active |= IFM_NONE; 219 mii->mii_media_status = 0; 220 return; 221 } 222 223 if ((bmcr & BMCR_LOOP) != 0) 224 mii->mii_media_active |= IFM_LOOP; 225 226 if ((bmcr & BMCR_AUTOEN) != 0) { 227 if ((bmsr & BMSR_ACOMP) == 0) { 228 /* Erg, still trying, I guess... */ 229 mii->mii_media_active |= IFM_NONE; 230 return; 231 } 232 } 233 234 switch (physts & STATUS_SPEED_MASK) { 235 case STATUS_SPEED_100: 236 mii->mii_media_active |= IFM_100_TX; 237 break; 238 case STATUS_SPEED_10: 239 mii->mii_media_active |= IFM_10_T; 240 break; 241 default: 242 mii->mii_media_active |= IFM_NONE; 243 return; 244 } 245 if ((physts & STATUS_FULL_DUPLEX) != 0) 246 mii->mii_media_active |= IFM_FDX | mii_phy_flowstatus(sc); 247 else 248 mii->mii_media_active |= IFM_HDX; 249 } 250