micphy.c revision 1.1.6.2
1 /* $NetBSD: micphy.c,v 1.1.6.2 2014/05/22 11:40:23 yamt Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 9 * NASA Ames Research Center, and by Frank van der Linden. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1997 Manuel Bouyer. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 55 */ 56 57 /* 58 * Driver for Micrel KSZ9021RN PHYs 59 */ 60 61 #include <sys/cdefs.h> 62 __KERNEL_RCSID(0, "$NetBSD: micphy.c,v 1.1.6.2 2014/05/22 11:40:23 yamt Exp $"); 63 64 #include "opt_mii.h" 65 66 #include <sys/param.h> 67 #include <sys/systm.h> 68 #include <sys/kernel.h> 69 #include <sys/device.h> 70 #include <sys/socket.h> 71 #include <sys/errno.h> 72 73 #include <net/if.h> 74 #include <net/if_media.h> 75 76 #include <dev/mii/mii.h> 77 #include <dev/mii/miivar.h> 78 #include <dev/mii/miidevs.h> 79 80 static int micphymatch(device_t, cfdata_t, void *); 81 static void micphyattach(device_t, device_t, void *); 82 83 CFATTACH_DECL3_NEW(micphy, sizeof(struct mii_softc), 84 micphymatch, micphyattach, mii_phy_detach, mii_phy_activate, NULL, NULL, 85 DVF_DETACH_SHUTDOWN); 86 87 static int micphy_service(struct mii_softc *, struct mii_data *, int); 88 static void micphy_fixup(struct mii_softc *, int, int, device_t); 89 90 static const struct mii_phy_funcs micphy_funcs = { 91 micphy_service, ukphy_status, mii_phy_reset, 92 }; 93 94 static const struct mii_phydesc micphys[] = { 95 { MII_OUI_MICREL, MII_MODEL_MICREL_KSZ9021RNI, 96 MII_STR_MICREL_KSZ9021RNI }, 97 98 { 0, 0, 99 NULL }, 100 }; 101 102 static int 103 micphymatch(device_t parent, cfdata_t match, void *aux) 104 { 105 struct mii_attach_args *ma = aux; 106 107 if (mii_phy_match(ma, micphys) != NULL) 108 return 10; 109 110 return 1; 111 } 112 113 static void 114 micphyattach(device_t parent, device_t self, void *aux) 115 { 116 struct mii_softc *sc = device_private(self); 117 struct mii_attach_args *ma = aux; 118 struct mii_data *mii = ma->mii_data; 119 int model = MII_MODEL(ma->mii_id2); 120 int rev = MII_REV(ma->mii_id2); 121 const struct mii_phydesc *mpd; 122 123 mpd = mii_phy_match(ma, micphys); 124 aprint_naive(": Media interface\n"); 125 aprint_normal(": %s, rev. %d\n", mpd->mpd_name, rev); 126 127 sc->mii_dev = self; 128 sc->mii_inst = mii->mii_instance; 129 sc->mii_phy = ma->mii_phyno; 130 sc->mii_funcs = &micphy_funcs; 131 sc->mii_pdata = mii; 132 sc->mii_flags = ma->mii_flags; 133 sc->mii_anegticks = MII_ANEGTICKS; 134 135 PHY_RESET(sc); 136 137 micphy_fixup(sc, model, rev, parent); 138 139 sc->mii_capabilities = 140 PHY_READ(sc, MII_BMSR) & ma->mii_capmask; 141 if (sc->mii_capabilities & BMSR_EXTSTAT) 142 sc->mii_extcapabilities = PHY_READ(sc, MII_EXTSR); 143 aprint_normal_dev(self, ""); 144 if ((sc->mii_capabilities & BMSR_MEDIAMASK) == 0 && 145 (sc->mii_extcapabilities & EXTSR_MEDIAMASK) == 0) 146 aprint_error("no media present"); 147 else 148 mii_phy_add_media(sc); 149 aprint_normal("\n"); 150 } 151 152 static int 153 micphy_service(struct mii_softc *sc, struct mii_data *mii, int cmd) 154 { 155 struct ifmedia_entry *ife = mii->mii_media.ifm_cur; 156 int reg; 157 158 switch (cmd) { 159 case MII_POLLSTAT: 160 /* 161 * If we're not polling our PHY instance, just return. 162 */ 163 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 164 return 0; 165 break; 166 167 case MII_MEDIACHG: 168 /* 169 * If the media indicates a different PHY instance, 170 * isolate ourselves. 171 */ 172 if (IFM_INST(ife->ifm_media) != sc->mii_inst) { 173 reg = PHY_READ(sc, MII_BMCR); 174 PHY_WRITE(sc, MII_BMCR, reg | BMCR_ISO); 175 return 0; 176 } 177 178 /* 179 * If the interface is not up, don't do anything. 180 */ 181 if ((mii->mii_ifp->if_flags & IFF_UP) == 0) 182 break; 183 184 mii_phy_setmedia(sc); 185 break; 186 187 case MII_TICK: 188 /* 189 * If we're not currently selected, just return. 190 */ 191 if (IFM_INST(ife->ifm_media) != sc->mii_inst) 192 return 0; 193 194 if (mii_phy_tick(sc) == EJUSTRETURN) 195 return 0; 196 break; 197 198 case MII_DOWN: 199 mii_phy_down(sc); 200 return 0; 201 } 202 203 /* Update the media status. */ 204 mii_phy_status(sc); 205 206 /* Callback if something changed. */ 207 mii_phy_update(sc, cmd); 208 return 0; 209 } 210 211 #define XREG_CONTROL 0x0b 212 #define XREG_WRITE 0x0c 213 #define XREG_READ 0x0d 214 #define XREG_CTL_SEL_READ 0x0000 215 #define XREG_CTL_SEL_WRITE 0x8000 216 217 #define REG_RGMII_CLOCK_AND_CONTROL 0x104 218 #define REG_RGMII_RX_DATA 0x105 219 220 static void micphy_writexreg(struct mii_softc *sc, uint32_t reg, uint32_t wval) 221 { 222 int rval; 223 224 PHY_WRITE(sc, XREG_CONTROL, XREG_CTL_SEL_WRITE | reg); 225 PHY_WRITE(sc, XREG_WRITE, wval); 226 PHY_WRITE(sc, XREG_CONTROL, XREG_CTL_SEL_READ | reg); 227 rval = PHY_READ(sc, XREG_READ); 228 KDASSERT(wval == rval); 229 } 230 231 static void 232 micphy_fixup(struct mii_softc *sc, int model, int rev, device_t parent) 233 { 234 switch (model) { 235 case MII_MODEL_MICREL_KSZ9021RNI: 236 if (!device_is_a(parent, "cpsw")) 237 break; 238 239 aprint_normal_dev(sc->mii_dev, "adjusting RGMII signal timing for cpsw\n"); 240 241 // RGMII RX Data Pad Skew 242 micphy_writexreg(sc, REG_RGMII_RX_DATA, 0x0000); 243 244 // RGMII Clock and Control Pad Skew 245 micphy_writexreg(sc, REG_RGMII_CLOCK_AND_CONTROL, 0x9090); 246 247 break; 248 } 249 250 return; 251 } 252
Indexes created Wed Oct 15 16:09:53 GMT 2025