nsgphy.c revision 194134
1/*- 2 * Copyright (c) 2001 Wind River Systems 3 * Copyright (c) 2001 4 * Bill Paul <wpaul@bsdi.com>. All rights reserved. 5 * Copyright (c) 1998, 1999, 2000, 2001 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 10 * NASA Ames Research Center. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by Bill Paul. 23 * 4. Neither the name of the author nor the names of any co-contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 37 * THE POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40#include <sys/cdefs.h> 41__FBSDID("$FreeBSD: head/sys/dev/mii/nsgphy.c 194134 2009-06-13 23:27:04Z marius $"); 42 43/* 44 * Driver for the National Semiconductor DP83861, DP83865 and DP83891 45 * 10/100/1000 PHYs. 46 * Datasheet available at: http://www.national.com/ds/DP/DP83861.pdf 47 * and at: http://www.national.com/ds/DP/DP83865.pdf 48 * 49 * The DP83891 is the older NS GigE PHY which isn't being sold 50 * anymore. The DP83861 is its replacement, which is an 'enhanced' 51 * firmware driven component. The major difference between the 52 * two is that the DP83891 can't generate interrupts, while the 53 * 83861 can (probably it wasn't originally designed to do this, but 54 * it can now thanks to firmware updates). The DP83861 also allows 55 * access to its internal RAM via indirect register access. The 56 * DP83865 is an ultra low power version of the DP83861 and DP83891. 57 */ 58 59#include <sys/param.h> 60#include <sys/systm.h> 61#include <sys/kernel.h> 62#include <sys/module.h> 63#include <sys/socket.h> 64#include <sys/bus.h> 65 66#include <net/if.h> 67#include <net/if_media.h> 68 69#include <dev/mii/mii.h> 70#include <dev/mii/miivar.h> 71#include "miidevs.h" 72 73#include <dev/mii/nsgphyreg.h> 74 75#include "miibus_if.h" 76 77static int nsgphy_probe(device_t); 78static int nsgphy_attach(device_t); 79 80static device_method_t nsgphy_methods[] = { 81 /* device interface */ 82 DEVMETHOD(device_probe, nsgphy_probe), 83 DEVMETHOD(device_attach, nsgphy_attach), 84 DEVMETHOD(device_detach, mii_phy_detach), 85 DEVMETHOD(device_shutdown, bus_generic_shutdown), 86 { 0, 0 } 87}; 88 89static devclass_t nsgphy_devclass; 90 91static driver_t nsgphy_driver = { 92 "nsgphy", 93 nsgphy_methods, 94 sizeof(struct mii_softc) 95}; 96 97DRIVER_MODULE(nsgphy, miibus, nsgphy_driver, nsgphy_devclass, 0, 0); 98 99static int nsgphy_service(struct mii_softc *, struct mii_data *,int); 100static void nsgphy_status(struct mii_softc *); 101 102static const struct mii_phydesc nsgphys[] = { 103 MII_PHY_DESC(NATSEMI, DP83861), 104 MII_PHY_DESC(NATSEMI, DP83865), 105 MII_PHY_DESC(NATSEMI, DP83891), 106 MII_PHY_END 107}; 108 109static int 110nsgphy_probe(device_t dev) 111{ 112 113 return (mii_phy_dev_probe(dev, nsgphys, BUS_PROBE_DEFAULT)); 114} 115 116static int 117nsgphy_attach(device_t dev) 118{ 119 struct mii_softc *sc; 120 struct mii_attach_args *ma; 121 struct mii_data *mii; 122 123 sc = device_get_softc(dev); 124 ma = device_get_ivars(dev); 125 if (bootverbose) 126 device_printf(dev, "<rev. %d>\n", MII_REV(ma->mii_id2)); 127 device_printf(dev, " "); 128 sc->mii_dev = device_get_parent(dev); 129 mii = device_get_softc(sc->mii_dev); 130 LIST_INSERT_HEAD(&mii->mii_phys, sc, mii_list); 131 132 sc->mii_inst = mii->mii_instance; 133 sc->mii_phy = ma->mii_phyno; 134 sc->mii_service = nsgphy_service; 135 sc->mii_pdata = mii; 136 137 mii->mii_instance++; 138 139 mii_phy_reset(sc); 140 141 /* 142 * NB: the PHY has the 10baseT BMSR bits hard-wired to 0, 143 * even though it supports 10baseT. 144 */ 145 sc->mii_capabilities = (PHY_READ(sc, MII_BMSR) | 146 (BMSR_10TFDX | BMSR_10THDX)) & ma->mii_capmask; 147 if (sc->mii_capabilities & BMSR_EXTSTAT) 148 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 149 150 mii_phy_add_media(sc); 151 printf("\n"); 152 153 MIIBUS_MEDIAINIT(sc->mii_dev); 154 return (0); 155} 156 157static int 158nsgphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 159{ 160 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 161 int reg; 162 163 switch (cmd) { 164 case MII_POLLSTAT: 165 /* 166 * If we're not polling our PHY instance, just return. 167 */ 168 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 169 return (0); 170 break; 171 172 case MII_MEDIACHG: 173 /* 174 * If the media indicates a different PHY instance, 175 * isolate ourselves. 176 */ 177 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 178 reg = PHY_READ(sc, MII_BMCR); 179 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 180 return (0); 181 } 182 183 /* 184 * If the interface is not up, don't do anything. 185 */ 186 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 187 break; 188 189 mii_phy_setmedia(sc); 190 break; 191 192 case MII_TICK: 193 /* 194 * If we're not currently selected, just return. 195 */ 196 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 197 return (0); 198 199 if (mii_phy_tick(sc) == EJUSTRETURN) 200 return (0); 201 break; 202 } 203 204 /* Update the media status. */ 205 nsgphy_status(sc); 206 207 /* Callback if something changed. */ 208 mii_phy_update(sc, cmd); 209 return (0); 210} 211 212static void 213nsgphy_status(struct mii_softc *sc) 214{ 215 struct mii_data *mii = sc->mii_pdata; 216 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 217 int bmsr, bmcr, physup, gtsr; 218 219 mii->mii_media_status = IFM_AVALID; 220 mii->mii_media_active = IFM_ETHER; 221 222 bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); 223 224 physup = PHY_READ(sc, NSGPHY_MII_PHYSUP); 225 226 if (physup & PHY_SUP_LINK) 227 mii->mii_media_status |= IFM_ACTIVE; 228 229 bmcr = PHY_READ(sc, MII_BMCR); 230 if (bmcr & BMCR_ISO) { 231 mii->mii_media_active |= IFM_NONE; 232 mii->mii_media_status = 0; 233 return; 234 } 235 236 if (bmcr & BMCR_LOOP) 237 mii->mii_media_active |= IFM_LOOP; 238 239 if (bmcr & BMCR_AUTOEN) { 240 /* 241 * The media status bits are only valid if autonegotiation 242 * has completed (or it's disabled). 243 */ 244 if ((bmsr & BMSR_ACOMP) == 0) { 245 /* Erg, still trying, I guess... */ 246 mii->mii_media_active |= IFM_NONE; 247 return; 248 } 249 250 switch (physup & (PHY_SUP_SPEED1 | PHY_SUP_SPEED0)) { 251 case PHY_SUP_SPEED1: 252 mii->mii_media_active |= IFM_1000_T; 253 gtsr = PHY_READ(sc, MII_100T2SR); 254 if (gtsr & GTSR_MS_RES) 255 mii->mii_media_active |= IFM_ETH_MASTER; 256 break; 257 258 case PHY_SUP_SPEED0: 259 mii->mii_media_active |= IFM_100_TX; 260 break; 261 262 case 0: 263 mii->mii_media_active |= IFM_10_T; 264 break; 265 266 default: 267 mii->mii_media_active |= IFM_NONE; 268 mii->mii_media_status = 0; 269 return; 270 } 271 272 if (physup & PHY_SUP_DUPLEX) 273 mii->mii_media_active |= IFM_FDX; 274 else 275 mii->mii_media_active |= IFM_HDX; 276 } else 277 mii->mii_media_active = ife->ifm_media; 278} 279