1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2011-2012 Stefan Bethke. 5 * Copyright (c) 2012 Adrian Chadd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following 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 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/errno.h> 33 #include <sys/kernel.h> 34 #include <sys/lock.h> 35 #include <sys/module.h> 36 #include <sys/mutex.h> 37 #include <sys/socket.h> 38 #include <sys/sockio.h> 39 #include <sys/sysctl.h> 40 #include <sys/systm.h> 41 42 #include <net/if.h> 43 #include <net/if_media.h> 44 45 #include <machine/bus.h> 46 #include <dev/iicbus/iic.h> 47 #include <dev/iicbus/iiconf.h> 48 #include <dev/iicbus/iicbus.h> 49 #include <dev/mii/mii.h> 50 #include <dev/mii/miivar.h> 51 #include <dev/mdio/mdio.h> 52 53 #include <dev/etherswitch/etherswitch.h> 54 55 #include <dev/etherswitch/arswitch/arswitchreg.h> 56 #include <dev/etherswitch/arswitch/arswitchvar.h> 57 58 #include <dev/etherswitch/arswitch/arswitch_reg.h> 59 #include <dev/etherswitch/arswitch/arswitch_phy.h> 60 61 #include "mdio_if.h" 62 #include "miibus_if.h" 63 #include "etherswitch_if.h" 64 65 /* 66 * Access PHYs integrated into the switch by going direct 67 * to the PHY space itself, rather than through the switch 68 * MDIO register. 69 */ 70 int 71 arswitch_readphy_external(device_t dev, int phy, int reg) 72 { 73 int ret; 74 struct arswitch_softc *sc; 75 76 sc = device_get_softc(dev); 77 78 ARSWITCH_LOCK(sc); 79 ret = (MDIO_READREG(device_get_parent(dev), phy, reg)); 80 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 81 "%s: phy=0x%08x, reg=0x%08x, ret=0x%08x\n", 82 __func__, phy, reg, ret); 83 ARSWITCH_UNLOCK(sc); 84 85 return (ret); 86 } 87 88 int 89 arswitch_writephy_external(device_t dev, int phy, int reg, int data) 90 { 91 struct arswitch_softc *sc; 92 93 sc = device_get_softc(dev); 94 95 ARSWITCH_LOCK(sc); 96 (void) MDIO_WRITEREG(device_get_parent(dev), phy, 97 reg, data); 98 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 99 "%s: phy=0x%08x, reg=0x%08x, data=0x%08x\n", 100 __func__, phy, reg, data); 101 ARSWITCH_UNLOCK(sc); 102 103 return (0); 104 } 105 106 /* 107 * Access PHYs integrated into the switch chip through the switch's MDIO 108 * control register. 109 */ 110 int 111 arswitch_readphy_internal(device_t dev, int phy, int reg) 112 { 113 struct arswitch_softc *sc; 114 uint32_t data = 0, ctrl; 115 int err, timeout; 116 uint32_t a; 117 118 sc = device_get_softc(dev); 119 ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 120 121 if (phy < 0 || phy >= 32) 122 return (ENXIO); 123 if (reg < 0 || reg >= 32) 124 return (ENXIO); 125 126 if (AR8X16_IS_SWITCH(sc, AR8327)) 127 a = AR8327_REG_MDIO_CTRL; 128 else 129 a = AR8X16_REG_MDIO_CTRL; 130 131 ARSWITCH_LOCK(sc); 132 err = arswitch_writereg_msb(dev, a, 133 AR8X16_MDIO_CTRL_BUSY | AR8X16_MDIO_CTRL_MASTER_EN | 134 AR8X16_MDIO_CTRL_CMD_READ | 135 (phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) | 136 (reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT)); 137 DEVERR(dev, err, "arswitch_readphy()=%d: phy=%d.%02x\n", phy, reg); 138 if (err != 0) 139 goto fail; 140 for (timeout = 100; timeout--; ) { 141 ctrl = arswitch_readreg_msb(dev, a); 142 if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0) 143 break; 144 } 145 if (timeout < 0) { 146 DPRINTF(sc, ARSWITCH_DBG_ANY, 147 "arswitch_readphy(): phy=%d.%02x; timeout=%d\n", 148 phy, reg, timeout); 149 goto fail; 150 } 151 data = arswitch_readreg_lsb(dev, a) & 152 AR8X16_MDIO_CTRL_DATA_MASK; 153 ARSWITCH_UNLOCK(sc); 154 155 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 156 "%s: phy=0x%08x, reg=0x%08x, ret=0x%08x\n", 157 __func__, phy, reg, data); 158 159 return (data); 160 161 fail: 162 ARSWITCH_UNLOCK(sc); 163 164 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 165 "%s: phy=0x%08x, reg=0x%08x, fail; err=%d\n", 166 __func__, phy, reg, err); 167 168 return (-1); 169 } 170 171 int 172 arswitch_writephy_internal(device_t dev, int phy, int reg, int data) 173 { 174 struct arswitch_softc *sc; 175 uint32_t ctrl; 176 int err, timeout; 177 uint32_t a; 178 179 sc = device_get_softc(dev); 180 ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 181 182 if (reg < 0 || reg >= 32) 183 return (ENXIO); 184 185 if (AR8X16_IS_SWITCH(sc, AR8327)) 186 a = AR8327_REG_MDIO_CTRL; 187 else 188 a = AR8X16_REG_MDIO_CTRL; 189 190 ARSWITCH_LOCK(sc); 191 err = arswitch_writereg(dev, a, 192 AR8X16_MDIO_CTRL_BUSY | 193 AR8X16_MDIO_CTRL_MASTER_EN | 194 AR8X16_MDIO_CTRL_CMD_WRITE | 195 (phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) | 196 (reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT) | 197 (data & AR8X16_MDIO_CTRL_DATA_MASK)); 198 if (err != 0) 199 goto out; 200 for (timeout = 100; timeout--; ) { 201 ctrl = arswitch_readreg(dev, a); 202 if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0) 203 break; 204 } 205 if (timeout < 0) 206 err = EIO; 207 208 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 209 "%s: phy=0x%08x, reg=0x%08x, data=0x%08x, err=%d\n", 210 __func__, phy, reg, data, err); 211 212 out: 213 DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg); 214 ARSWITCH_UNLOCK(sc); 215 return (err); 216 } 217