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 *
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27 * $FreeBSD: head/sys/dev/etherswitch/arswitch/arswitch_phy.c 235288 2012-05-11 20:53:20Z adrian $
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27 * $FreeBSD: head/sys/dev/etherswitch/arswitch/arswitch_phy.c 241578 2012-10-15 12:20:40Z ray $ |
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) 68static 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 */ 75int 76arswitch_readphy(device_t dev, int phy, int reg) 77{
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78 struct arswitch_softc *sc; |
79 uint32_t data = 0, ctrl; 80 int err, timeout; 81
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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);
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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)
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92 return (-1);
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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)
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99 err = EIO;
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105 goto fail; |
106 data = arswitch_readreg_lsb(dev, AR8X16_REG_MDIO_CTRL) & 107 AR8X16_MDIO_CTRL_DATA_MASK;
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108 ARSWITCH_UNLOCK(sc); |
109 return (data);
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110 111fail: 112 ARSWITCH_UNLOCK(sc); 113 return (-1); |
114} 115 116int 117arswitch_writephy(device_t dev, int phy, int reg, int data) 118{
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119 struct arswitch_softc *sc; |
120 uint32_t ctrl; 121 int err, timeout;
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110
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122 123 sc = device_get_softc(dev); 124 ARSWITCH_LOCK_ASSERT(sc, MA_NOTOWNED); 125 |
126 if (reg < 0 || reg >= 32) 127 return (ENXIO);
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128 129 ARSWITCH_LOCK(sc); |
130 err = arswitch_writereg_lsb(dev, AR8X16_REG_MDIO_CTRL, 131 (data & AR8X16_MDIO_CTRL_DATA_MASK));
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115 DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg);
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132 if (err != 0)
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117 return (err);
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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));
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124 DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg);
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140 if (err != 0)
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126 return (err);
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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;
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149out: |
150 DEVERR(dev, err, "arswitch_writephy()=%d: phy=%d.%02x\n", phy, reg);
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151 ARSWITCH_UNLOCK(sc); |
152 return (err); 153}
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