1 /*- 2 * Copyright (c) 2011-2012 Stefan Bethke. 3 * Copyright (c) 2012 Adrian Chadd. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 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/module.h> 35 #include <sys/socket.h> 36 #include <sys/sockio.h> 37 #include <sys/sysctl.h> 38 #include <sys/systm.h> 39 40 #include <net/if.h> 41 #include <net/if_arp.h> 42 #include <net/ethernet.h> 43 #include <net/if_dl.h> 44 #include <net/if_media.h> 45 #include <net/if_types.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/etherswitch/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 #if defined(DEBUG) 68 static SYSCTL_NODE(_debug, OID_AUTO, arswitch, CTLFLAG_RD, 0, "arswitch"); 69 #endif 70 71 /* 72 * access PHYs integrated into the switch chip through the switch's MDIO 73 * control register. 74 */ 75 int 76 arswitch_readphy(device_t dev, int phy, int reg) 77 { 78 struct arswitch_softc *sc; 79 uint32_t data = 0, ctrl; 80 int err, timeout; 81 82 sc = device_get_softc(dev); 83 ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 84 85 if (phy < 0 || phy >= 32) 86 return (ENXIO); 87 if (reg < 0 || reg >= 32) 88 return (ENXIO); 89 90 ARSWITCH_LOCK(sc); 91 err = arswitch_writereg_msb(dev, AR8X16_REG_MDIO_CTRL, 92 AR8X16_MDIO_CTRL_BUSY | AR8X16_MDIO_CTRL_MASTER_EN | 93 AR8X16_MDIO_CTRL_CMD_READ | 94 (phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) | 95 (reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT)); 96 DEVERR(dev, err, "arswitch_readphy()=%d: phy=%d.%02x\n", phy, reg); 97 if (err != 0) 98 goto fail; 99 for (timeout = 100; timeout--; ) { 100 ctrl = arswitch_readreg_msb(dev, AR8X16_REG_MDIO_CTRL); 101 if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0) 102 break; 103 } 104 if (timeout < 0) 105 goto fail; 106 data = arswitch_readreg_lsb(dev, AR8X16_REG_MDIO_CTRL) & 107 AR8X16_MDIO_CTRL_DATA_MASK; 108 ARSWITCH_UNLOCK(sc); 109 return (data); 110 111 fail: 112 ARSWITCH_UNLOCK(sc); 113 return (-1); 114 } 115 116 int 117 arswitch_writephy(device_t dev, int phy, int reg, int data) 118 { 119 struct arswitch_softc *sc; 120 uint32_t ctrl; 121 int err, timeout; 122 123 sc = device_get_softc(dev); 124 ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 125 126 if (reg < 0 || reg >= 32) 127 return (ENXIO); 128 129 ARSWITCH_LOCK(sc); 130 err = arswitch_writereg_lsb(dev, AR8X16_REG_MDIO_CTRL, 131 (data & AR8X16_MDIO_CTRL_DATA_MASK)); 132 if (err != 0) 133 goto out; 134 err = arswitch_writereg_msb(dev, AR8X16_REG_MDIO_CTRL, 135 AR8X16_MDIO_CTRL_BUSY | 136 AR8X16_MDIO_CTRL_MASTER_EN | 137 AR8X16_MDIO_CTRL_CMD_WRITE | 138 (phy << AR8X16_MDIO_CTRL_PHY_ADDR_SHIFT) | 139 (reg << AR8X16_MDIO_CTRL_REG_ADDR_SHIFT)); 140 if (err != 0) 141 goto out; 142 for (timeout = 100; timeout--; ) { 143 ctrl = arswitch_readreg(dev, AR8X16_REG_MDIO_CTRL); 144 if ((ctrl & AR8X16_MDIO_CTRL_BUSY) == 0) 145 break; 146 } 147 if (timeout < 0) 148 err = EIO; 149 out: 150 DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg); 151 ARSWITCH_UNLOCK(sc); 152 return (err); 153 } 154