| 1 | /* $NetBSD: pnaphy.c,v 1.21 2016/07/07 06:55:41 msaitoh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright 2001 Wasabi Systems, Inc. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Written by Jason R. Thorpe for Wasabi Systems, Inc. |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * 2. Redistributions in binary form must reproduce the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer in the |
| 16 | * documentation and/or other materials provided with the distribution. |
| 17 | * 3. All advertising materials mentioning features or use of this software |
| 18 | * must display the following acknowledgement: |
| 19 | * This product includes software developed for the NetBSD Project by |
| 20 | * Wasabi Systems, Inc. |
| 21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
| 22 | * or promote products derived from this software without specific prior |
| 23 | * written permission. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
| 26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
| 29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 35 | * POSSIBILITY OF SUCH DAMAGE. |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * Driver for generic HomePNA 1.0 PHYs. |
| 40 | * |
| 41 | * HomePNA 1.0 PHYs are pretty simple -- they support exactly one |
| 42 | * media type, and don't do autonegotiation. |
| 43 | * |
| 44 | * HomePNA PHYs often have vendor-specific registers for tuning |
| 45 | * the network connection, but we don't deal with any of that |
| 46 | * at all. |
| 47 | */ |
| 48 | |
| 49 | #include <sys/cdefs.h> |
| 50 | __KERNEL_RCSID(0, "$NetBSD: pnaphy.c,v 1.21 2016/07/07 06:55:41 msaitoh Exp $" ); |
| 51 | |
| 52 | #include <sys/param.h> |
| 53 | #include <sys/systm.h> |
| 54 | #include <sys/kernel.h> |
| 55 | #include <sys/device.h> |
| 56 | #include <sys/socket.h> |
| 57 | #include <sys/errno.h> |
| 58 | |
| 59 | #include <net/if.h> |
| 60 | #include <net/if_media.h> |
| 61 | |
| 62 | #include <dev/mii/mii.h> |
| 63 | #include <dev/mii/miivar.h> |
| 64 | #include <dev/mii/miidevs.h> |
| 65 | |
| 66 | static int pnaphymatch(device_t, cfdata_t, void *); |
| 67 | static void pnaphyattach(device_t, device_t, void *); |
| 68 | |
| 69 | CFATTACH_DECL_NEW(pnaphy, sizeof(struct mii_softc), |
| 70 | pnaphymatch, pnaphyattach, mii_phy_detach, mii_phy_activate); |
| 71 | |
| 72 | static int pnaphy_service(struct mii_softc *, struct mii_data *, int); |
| 73 | static void pnaphy_status(struct mii_softc *); |
| 74 | |
| 75 | static const struct mii_phy_funcs pnaphy_funcs = { |
| 76 | pnaphy_service, pnaphy_status, mii_phy_reset, |
| 77 | }; |
| 78 | |
| 79 | static const struct mii_phydesc pnaphys[] = { |
| 80 | { MII_OUI_yyAMD, MII_MODEL_yyAMD_79c901home, |
| 81 | MII_STR_yyAMD_79c901home }, |
| 82 | |
| 83 | { 0, 0, |
| 84 | NULL }, |
| 85 | }; |
| 86 | |
| 87 | static int |
| 88 | pnaphymatch(device_t parent, cfdata_t match, void *aux) |
| 89 | { |
| 90 | struct mii_attach_args *ma = aux; |
| 91 | |
| 92 | if (mii_phy_match(ma, pnaphys) != NULL) { |
| 93 | /* |
| 94 | * Match higher than ukphy, but lower than a specific |
| 95 | * driver would match. |
| 96 | */ |
| 97 | return (2); |
| 98 | } |
| 99 | |
| 100 | return (0); |
| 101 | } |
| 102 | |
| 103 | static void |
| 104 | pnaphyattach(device_t parent, device_t self, void *aux) |
| 105 | { |
| 106 | struct mii_softc *sc = device_private(self); |
| 107 | struct mii_attach_args *ma = aux; |
| 108 | struct mii_data *mii = ma->mii_data; |
| 109 | const struct mii_phydesc *mpd; |
| 110 | |
| 111 | mpd = mii_phy_match(ma, pnaphys); |
| 112 | aprint_naive(": Media interface\n" ); |
| 113 | aprint_normal(": %s, rev. %d\n" , mpd->mpd_name, MII_REV(ma->mii_id2)); |
| 114 | |
| 115 | sc->mii_dev = self; |
| 116 | sc->mii_inst = mii->mii_instance; |
| 117 | sc->mii_phy = ma->mii_phyno; |
| 118 | sc->mii_funcs = &pnaphy_funcs; |
| 119 | sc->mii_pdata = mii; |
| 120 | sc->mii_flags = ma->mii_flags | MIIF_IS_HPNA; /* force HomePNA */ |
| 121 | sc->mii_anegticks = MII_ANEGTICKS; |
| 122 | |
| 123 | PHY_RESET(sc); |
| 124 | |
| 125 | sc->mii_capabilities = PHY_READ(sc, MII_BMSR) & ma->mii_capmask; |
| 126 | aprint_normal_dev(self, "" ); |
| 127 | if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0) |
| 128 | aprint_error("no media present" ); |
| 129 | else |
| 130 | mii_phy_add_media(sc); |
| 131 | aprint_normal("\n" ); |
| 132 | } |
| 133 | |
| 134 | static int |
| 135 | pnaphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) |
| 136 | { |
| 137 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
| 138 | int reg; |
| 139 | |
| 140 | switch (cmd) { |
| 141 | case MII_POLLSTAT: |
| 142 | /* |
| 143 | * If we're not polling our PHY instance, just return. |
| 144 | */ |
| 145 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) |
| 146 | return (0); |
| 147 | break; |
| 148 | |
| 149 | case MII_MEDIACHG: |
| 150 | /* |
| 151 | * If the media indicates a different PHY instance, |
| 152 | * isolate ourselves. |
| 153 | */ |
| 154 | if (IFM_INST(ife->ifm_media) != sc->mii_inst) { |
| 155 | reg = PHY_READ(sc, MII_BMCR); |
| 156 | PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); |
| 157 | return (0); |
| 158 | } |
| 159 | |
| 160 | /* |
| 161 | * If the interface is not up, don't do anything. |
| 162 | */ |
| 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 | if (mii_phy_tick(sc) == EJUSTRETURN) |
| 177 | return (0); |
| 178 | break; |
| 179 | |
| 180 | case MII_DOWN: |
| 181 | mii_phy_down(sc); |
| 182 | return (0); |
| 183 | } |
| 184 | |
| 185 | /* Update the media status. */ |
| 186 | mii_phy_status(sc); |
| 187 | |
| 188 | /* Callback if something changed. */ |
| 189 | mii_phy_update(sc, cmd); |
| 190 | return (0); |
| 191 | } |
| 192 | |
| 193 | static void |
| 194 | pnaphy_status(struct mii_softc *sc) |
| 195 | { |
| 196 | struct mii_data *mii = sc->mii_pdata; |
| 197 | struct ifmedia_entry *ife = mii->mii_media.ifm_cur; |
| 198 | int bmsr, bmcr; |
| 199 | |
| 200 | mii->mii_media_status = IFM_AVALID; |
| 201 | mii->mii_media_active = IFM_ETHER; |
| 202 | |
| 203 | bmsr = PHY_READ(sc, MII_BMSR) | PHY_READ(sc, MII_BMSR); |
| 204 | |
| 205 | if (bmsr & BMSR_LINK) |
| 206 | mii->mii_media_status |= IFM_ACTIVE; |
| 207 | |
| 208 | bmcr = PHY_READ(sc, MII_BMCR); |
| 209 | if (bmcr & BMCR_ISO) { |
| 210 | mii->mii_media_active |= IFM_NONE; |
| 211 | mii->mii_media_status = 0; |
| 212 | return; |
| 213 | } |
| 214 | |
| 215 | if (bmcr & BMCR_LOOP) |
| 216 | mii->mii_media_active |= IFM_LOOP; |
| 217 | |
| 218 | /* |
| 219 | * On HomePNA PHYs, the current media is always the selected |
| 220 | * media. |
| 221 | * |
| 222 | * XXX May not be the case w/ HomePNA 2. |
| 223 | */ |
| 224 | mii->mii_media_active = ife->ifm_media; |
| 225 | } |
| 226 | |