1/*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 * $FreeBSD$ 30 */ 31 32#include <sys/param.h> 33#include <sys/bus.h> 34#include <sys/errno.h> 35#include <sys/kernel.h> 36#include <sys/lock.h> 37#include <sys/module.h> 38#include <sys/mutex.h> 39#include <sys/socket.h> 40#include <sys/sockio.h> 41#include <sys/sysctl.h> 42#include <sys/systm.h> 43 44#include <net/if.h> 45#include <net/if_media.h> 46 47#include <machine/bus.h> 48#include <dev/iicbus/iic.h> 49#include <dev/iicbus/iiconf.h> 50#include <dev/iicbus/iicbus.h> 51#include <dev/mii/mii.h> 52#include <dev/mii/miivar.h> 53#include <dev/mdio/mdio.h> 54 55#include <dev/etherswitch/etherswitch.h> 56 57#include <dev/etherswitch/arswitch/arswitchreg.h> 58#include <dev/etherswitch/arswitch/arswitchvar.h> 59 60#include <dev/etherswitch/arswitch/arswitch_reg.h> 61#include <dev/etherswitch/arswitch/arswitch_phy.h> 62 63#include "mdio_if.h" 64#include "miibus_if.h" 65#include "etherswitch_if.h" 66 67/* 68 * Access PHYs integrated into the switch by going direct 69 * to the PHY space itself, rather than through the switch 70 * MDIO register. 71 */ 72int 73arswitch_readphy_external(device_t dev, int phy, int reg) 74{ 75 int ret; 76 struct arswitch_softc *sc; 77 78 sc = device_get_softc(dev); 79 80 ARSWITCH_LOCK(sc); 81 ret = (MDIO_READREG(device_get_parent(dev), phy, reg)); 82 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 83 "%s: phy=0x%08x, reg=0x%08x, ret=0x%08x\n", 84 __func__, phy, reg, ret); 85 ARSWITCH_UNLOCK(sc); 86 87 return (ret); 88} 89 90int 91arswitch_writephy_external(device_t dev, int phy, int reg, int data) 92{ 93 struct arswitch_softc *sc; 94 95 sc = device_get_softc(dev); 96 97 ARSWITCH_LOCK(sc); 98 (void) MDIO_WRITEREG(device_get_parent(dev), phy, 99 reg, data); 100 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 101 "%s: phy=0x%08x, reg=0x%08x, data=0x%08x\n", 102 __func__, phy, reg, data); 103 ARSWITCH_UNLOCK(sc); 104 105 return (0); 106} 107 108/* 109 * Access PHYs integrated into the switch chip through the switch's MDIO 110 * control register. 111 */ 112int 113arswitch_readphy_internal(device_t dev, int phy, int reg) 114{ 115 struct arswitch_softc *sc; 116 uint32_t data = 0, ctrl; 117 int err, timeout; 118 uint32_t a; 119 120 sc = device_get_softc(dev); 121 ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 122 123 if (phy < 0 || phy >= 32) 124 return (ENXIO); 125 if (reg < 0 || reg >= 32) 126 return (ENXIO); 127 128 if (AR8X16_IS_SWITCH(sc, AR8327)) 129 a = AR8327_REG_MDIO_CTRL; 130 else 131 a = AR8X16_REG_MDIO_CTRL; 132 133 ARSWITCH_LOCK(sc); 134 err = arswitch_writereg_msb(dev, a, 135 AR8X16_MDIO_CTRL_BUSY | AR8X16_MDIO_CTRL_MASTER_EN | 136 AR8X16_MDIO_CTRL_CMD_READ | 137 (phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) | 138 (reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT)); 139 DEVERR(dev, err, "arswitch_readphy()=%d: phy=%d.%02x\n", phy, reg); 140 if (err != 0) 141 goto fail; 142 for (timeout = 100; timeout--; ) { 143 ctrl = arswitch_readreg_msb(dev, a); 144 if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0) 145 break; 146 } 147 if (timeout < 0) { 148 DPRINTF(sc, ARSWITCH_DBG_ANY, 149 "arswitch_readphy(): phy=%d.%02x; timeout=%d\n", 150 phy, reg, timeout); 151 goto fail; 152 } 153 data = arswitch_readreg_lsb(dev, a) & 154 AR8X16_MDIO_CTRL_DATA_MASK; 155 ARSWITCH_UNLOCK(sc); 156 157 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 158 "%s: phy=0x%08x, reg=0x%08x, ret=0x%08x\n", 159 __func__, phy, reg, data); 160 161 return (data); 162 163fail: 164 ARSWITCH_UNLOCK(sc); 165 166 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 167 "%s: phy=0x%08x, reg=0x%08x, fail; err=%d\n", 168 __func__, phy, reg, err); 169 170 return (-1); 171} 172 173int 174arswitch_writephy_internal(device_t dev, int phy, int reg, int data) 175{ 176 struct arswitch_softc *sc; 177 uint32_t ctrl; 178 int err, timeout; 179 uint32_t a; 180 181 sc = device_get_softc(dev); 182 ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 183 184 if (reg < 0 || reg >= 32) 185 return (ENXIO); 186 187 if (AR8X16_IS_SWITCH(sc, AR8327)) 188 a = AR8327_REG_MDIO_CTRL; 189 else 190 a = AR8X16_REG_MDIO_CTRL; 191 192 ARSWITCH_LOCK(sc); 193 err = arswitch_writereg(dev, a, 194 AR8X16_MDIO_CTRL_BUSY | 195 AR8X16_MDIO_CTRL_MASTER_EN | 196 AR8X16_MDIO_CTRL_CMD_WRITE | 197 (phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) | 198 (reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT) | 199 (data & AR8X16_MDIO_CTRL_DATA_MASK)); 200 if (err != 0) 201 goto out; 202 for (timeout = 100; timeout--; ) { 203 ctrl = arswitch_readreg(dev, a); 204 if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0) 205 break; 206 } 207 if (timeout < 0) 208 err = EIO; 209 210 DPRINTF(sc, ARSWITCH_DBG_PHYIO, 211 "%s: phy=0x%08x, reg=0x%08x, data=0x%08x, err=%d\n", 212 __func__, phy, reg, data, err); 213 214out: 215 DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg); 216 ARSWITCH_UNLOCK(sc); 217 return (err); 218} 219