1 /* $NetBSD: urlphy.c,v 1.22 2008/04/08 20:10:20 cegger Exp $ */ 2 /* 3 * Copyright (c) 2001, 2002 4 * Shingo WATANABE <nabe@nabechan.org>. 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 * 3. Neither the name of the author nor the names of any co-contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 */ 31 32 /* 33 * driver for Realtek RL8150L internal phy 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: urlphy.c,v 1.22 2008/04/08 20:10:20 cegger Exp $"); 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/device.h> 43 #include <sys/socket.h> 44 45 #include <net/if.h> 46 #include <net/if_media.h> 47 48 #include <dev/mii/mii.h> 49 #include <dev/mii/miivar.h> 50 #include <dev/mii/miidevs.h> 51 #include <dev/mii/urlphyreg.h> 52 53 #ifdef URLPHY_DEBUG 54 #define DPRINTF(x) if (urlphydebug) printf x 55 #define DPRINTFN(n,x) if (urlphydebug>(n)) printf x 56 int urlphydebug = URLPHY_DEBUG; 57 #else 58 #define DPRINTF(x) 59 #define DPRINTFN(n,x) 60 #endif 61 62 static int urlphy_match(struct device *, struct cfdata *, void *); 63 static void urlphy_attach(struct device *, struct device *, void *); 64 65 CFATTACH_DECL(urlphy, sizeof(struct mii_softc), 66 urlphy_match, urlphy_attach, mii_phy_detach, mii_phy_activate); 67 68 static int urlphy_service(struct mii_softc *, struct mii_data *, int); 69 static void urlphy_status(struct mii_softc *); 70 71 static const struct mii_phy_funcs urlphy_funcs = { 72 urlphy_service, urlphy_status, mii_phy_reset, 73 }; 74 75 static int 76 urlphy_match(struct device *parent, struct cfdata *match, void *aux) 77 { 78 struct mii_attach_args *ma = aux; 79 80 /* 81 * RTL8150 reports OUT == 0, MODEL == 0 82 */ 83 if (MII_OUI(ma->mii_id1, ma->mii_id2) != 0 && 84 MII_MODEL(ma->mii_id2) != 0) 85 return (0); 86 87 /* 88 * Make sure the parent is an 'url' device. 89 */ 90 if (!device_is_a(parent, "url")) 91 return(0); 92 93 return (10); 94 } 95 96 static void 97 urlphy_attach(struct device *parent, struct device *self, void *aux) 98 { 99 struct mii_softc *sc = device_private(self); 100 struct mii_attach_args *ma = aux; 101 struct mii_data *mii = ma->mii_data; 102 103 aprint_naive(": Media interface\n"); 104 aprint_normal(": Realtek RTL8150L internal media interface\n"); 105 106 DPRINTF(("%s: %s: enter\n", device_xname(&sc->mii_dev), __func__)); 107 108 sc->mii_inst = mii->mii_instance; 109 sc->mii_phy = ma->mii_phyno; 110 sc->mii_funcs = &urlphy_funcs; 111 sc->mii_pdata = mii; 112 sc->mii_flags = mii->mii_flags; 113 sc->mii_anegticks = MII_ANEGTICKS_GIGE; 114 115 /* Don't do loopback on this PHY. */ 116 sc->mii_flags |= MIIF_NOLOOP; 117 /* Don't do isolate on this PHY. */ 118 sc->mii_flags |= MIIF_NOISOLATE; 119 120 if (mii->mii_instance != 0) { 121 aprint_error_dev(&sc->mii_dev, "ignoring this PHY, non-zero instance\n"); 122 return; 123 } 124 PHY_RESET(sc); 125 126 sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 127 aprint_normal_dev(&sc->mii_dev, ""); 128 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) 129 aprint_error("no media present"); 130 else 131 mii_phy_add_media(sc); 132 aprint_normal("\n"); 133 134 if (!pmf_device_register(self, NULL, mii_phy_resume)) 135 aprint_error_dev(self, "couldn't establish power handler\n"); 136 } 137 138 static int 139 urlphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 140 { 141 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 142 int reg; 143 144 DPRINTF(("%s: %s: enter\n", device_xname(&sc->mii_dev), __func__)); 145 146 switch (cmd) { 147 case MII_POLLSTAT: 148 /* 149 * If we're not polling our PHY instance, just return. 150 */ 151 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 152 return (0); 153 break; 154 155 case MII_MEDIACHG: 156 /* 157 * If we're not currently selected, just return. 158 */ 159 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 160 return (0); 161 162 /* If the interface is not up, don't do anything. */ 163 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 164 break; 165 166 mii_phy_setmedia(sc); 167 break; 168 169 case MII_TICK: 170 /* 171 * If we're not currently selected, just return. 172 */ 173 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 174 return (0); 175 176 /* Just bail now if the interface is down. */ 177 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 178 return (0); 179 180 /* 181 * If we're not doing autonegotiation, we don't need to do 182 * any extra work here. However, we need to check the link 183 * status so we can generate an announcement if the status 184 * changes. 185 */ 186 if (IFM_SUBTYPE(ife->ifm_media) != IFM_AUTO) 187 return (0); 188 189 /* Read the status register twice; MSR_LINK is latch-low. */ 190 reg = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR); 191 if (reg & URLPHY_MSR_LINK) 192 return (0); 193 194 /* 195 * Only retry autonegotiation every N seconds. 196 */ 197 KASSERT(sc->mii_anegticks != 0); 198 if (++sc->mii_ticks <= sc->mii_anegticks) 199 return (0); 200 201 sc->mii_ticks = 0; 202 PHY_RESET(sc); 203 204 if (mii_phy_auto(sc, 0) == EJUSTRETURN) 205 return (0); 206 207 break; 208 209 case MII_DOWN: 210 mii_phy_down(sc); 211 return (0); 212 } 213 214 /* Update the media status. */ 215 mii_phy_status(sc); 216 217 /* Callback if something changed. */ 218 mii_phy_update(sc, cmd); 219 220 return (0); 221 } 222 223 static void 224 urlphy_status(struct mii_softc *sc) 225 { 226 struct mii_data *mii = sc->mii_pdata; 227 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 228 int msr, bmsr, bmcr; 229 230 DPRINTF(("%s: %s: enter\n", device_xname(&sc->mii_dev), __func__)); 231 232 mii->mii_media_status = IFM_AVALID; 233 mii->mii_media_active = IFM_ETHER; 234 235 /* 236 * The link status bit is not exist in the BMSR register, 237 * so we need to read the MSR register to get link status. 238 */ 239 msr = PHY_READ(sc, URLPHY_MSR) | PHY_READ(sc, URLPHY_MSR); 240 if (msr & URLPHY_MSR_LINK) 241 mii->mii_media_status |= IFM_ACTIVE; 242 243 DPRINTF(("%s: %s: link %s\n", device_xname(&sc->mii_dev), __func__, 244 mii->mii_media_status & IFM_ACTIVE ? "up" : "down")); 245 246 bmcr = PHY_READ(sc, MII_BMCR); 247 if (bmcr & BMCR_AUTOEN) { 248 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 249 if ((bmsr & BMSR_ACOMP) == 0) { 250 /* Erg, still trying, I guess... */ 251 mii->mii_media_active |= IFM_NONE; 252 return; 253 } 254 255 if (msr & URLPHY_MSR_SPEED_100) 256 mii->mii_media_active |= IFM_100_TX; 257 else 258 mii->mii_media_active |= IFM_10_T; 259 if (msr & URLPHY_MSR_DUPLEX) 260 mii->mii_media_active |= IFM_FDX; 261 } else 262 mii->mii_media_active = ife->ifm_media; 263 } 264