1/* 2 * linux/mii.h: definitions for MII-compatible transceivers 3 * Originally drivers/net/sunhme.h. 4 * 5 * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com) 6 */ 7 8#ifndef __LINUX_MII_H__ 9#define __LINUX_MII_H__ 10 11/* Generic MII registers. */ 12 13#define MII_BMCR 0x00 /* Basic mode control register */ 14#define MII_BMSR 0x01 /* Basic mode status register */ 15#define MII_PHYSID1 0x02 /* PHYS ID 1 */ 16#define MII_PHYSID2 0x03 /* PHYS ID 2 */ 17#define MII_ADVERTISE 0x04 /* Advertisement control reg */ 18#define MII_LPA 0x05 /* Link partner ability reg */ 19#define MII_EXPANSION 0x06 /* Expansion register */ 20#define MII_CTRL1000 0x09 /* 1000BASE-T control */ 21#define MII_STAT1000 0x0a /* 1000BASE-T status */ 22#define MII_ESTATUS 0x0f /* Extended Status */ 23#define MII_DCOUNTER 0x12 /* Disconnect counter */ 24#define MII_FCSCOUNTER 0x13 /* False carrier counter */ 25#define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */ 26#define MII_RERRCOUNTER 0x15 /* Receive error counter */ 27#define MII_SREVISION 0x16 /* Silicon revision */ 28#define MII_RESV1 0x17 /* Reserved... */ 29#define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */ 30#define MII_PHYADDR 0x19 /* PHY address */ 31#define MII_RESV2 0x1a /* Reserved... */ 32#define MII_TPISTATUS 0x1b /* TPI status for 10mbps */ 33#define MII_NCONFIG 0x1c /* Network interface config */ 34 35/* Basic mode control register. */ 36#define BMCR_RESV 0x003f /* Unused... */ 37#define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */ 38#define BMCR_CTST 0x0080 /* Collision test */ 39#define BMCR_FULLDPLX 0x0100 /* Full duplex */ 40#define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */ 41#define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */ 42#define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */ 43#define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */ 44#define BMCR_SPEED100 0x2000 /* Select 100Mbps */ 45#define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */ 46#define BMCR_RESET 0x8000 /* Reset the DP83840 */ 47 48/* Basic mode status register. */ 49#define BMSR_ERCAP 0x0001 /* Ext-reg capability */ 50#define BMSR_JCD 0x0002 /* Jabber detected */ 51#define BMSR_LSTATUS 0x0004 /* Link status */ 52#define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */ 53#define BMSR_RFAULT 0x0010 /* Remote fault detected */ 54#define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */ 55#define BMSR_RESV 0x00c0 /* Unused... */ 56#define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */ 57#define BMSR_100HALF2 0x0200 /* Can do 100BASE-T2 HDX */ 58#define BMSR_100FULL2 0x0400 /* Can do 100BASE-T2 FDX */ 59#define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */ 60#define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */ 61#define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */ 62#define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */ 63#define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */ 64 65/* Advertisement control register. */ 66#define ADVERTISE_SLCT 0x001f /* Selector bits */ 67#define ADVERTISE_CSMA 0x0001 /* Only selector supported */ 68#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */ 69#define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */ 70#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */ 71#define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */ 72#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */ 73#define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */ 74#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */ 75#define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */ 76#define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */ 77#define ADVERTISE_PAUSE_CAP 0x0400 /* Try for pause */ 78#define ADVERTISE_PAUSE_ASYM 0x0800 /* Try for asymetric pause */ 79#define ADVERTISE_RESV 0x1000 /* Unused... */ 80#define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */ 81#define ADVERTISE_LPACK 0x4000 /* Ack link partners response */ 82#define ADVERTISE_NPAGE 0x8000 /* Next page bit */ 83 84#define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \ 85 ADVERTISE_CSMA) 86#define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \ 87 ADVERTISE_100HALF | ADVERTISE_100FULL) 88 89/* Link partner ability register. */ 90#define LPA_SLCT 0x001f /* Same as advertise selector */ 91#define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */ 92#define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */ 93#define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */ 94#define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */ 95#define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */ 96#define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */ 97#define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */ 98#define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/ 99#define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */ 100#define LPA_PAUSE_CAP 0x0400 /* Can pause */ 101#define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */ 102#define LPA_RESV 0x1000 /* Unused... */ 103#define LPA_RFAULT 0x2000 /* Link partner faulted */ 104#define LPA_LPACK 0x4000 /* Link partner acked us */ 105#define LPA_NPAGE 0x8000 /* Next page bit */ 106 107#define LPA_DUPLEX (LPA_10FULL | LPA_100FULL) 108#define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4) 109 110/* Expansion register for auto-negotiation. */ 111#define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */ 112#define EXPANSION_LCWP 0x0002 /* Got new RX page code word */ 113#define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */ 114#define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */ 115#define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */ 116#define EXPANSION_RESV 0xffe0 /* Unused... */ 117 118#define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */ 119#define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */ 120 121/* N-way test register. */ 122#define NWAYTEST_RESV1 0x00ff /* Unused... */ 123#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */ 124#define NWAYTEST_RESV2 0xfe00 /* Unused... */ 125 126/* 1000BASE-T Control register */ 127#define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */ 128#define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */ 129 130/* 1000BASE-T Status register */ 131#define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */ 132#define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */ 133#define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */ 134#define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */ 135 136/* Flow control flags */ 137#define FLOW_CTRL_TX 0x01 138#define FLOW_CTRL_RX 0x02 139 140/** 141 * mii_nway_result 142 * @negotiated: value of MII ANAR and'd with ANLPAR 143 * 144 * Given a set of MII abilities, check each bit and returns the 145 * currently supported media, in the priority order defined by 146 * IEEE 802.3u. We use LPA_xxx constants but note this is not the 147 * value of LPA solely, as described above. 148 * 149 * The one exception to IEEE 802.3u is that 100baseT4 is placed 150 * between 100T-full and 100T-half. If your phy does not support 151 * 100T4 this is fine. If your phy places 100T4 elsewhere in the 152 * priority order, you will need to roll your own function. 153 */ 154static inline unsigned int mii_nway_result (unsigned int negotiated) 155{ 156 unsigned int ret; 157 158 if (negotiated & LPA_100FULL) 159 ret = LPA_100FULL; 160 else if (negotiated & LPA_100BASE4) 161 ret = LPA_100BASE4; 162 else if (negotiated & LPA_100HALF) 163 ret = LPA_100HALF; 164 else if (negotiated & LPA_10FULL) 165 ret = LPA_10FULL; 166 else 167 ret = LPA_10HALF; 168 169 return ret; 170} 171 172/** 173 * mii_duplex 174 * @duplex_lock: Non-zero if duplex is locked at full 175 * @negotiated: value of MII ANAR and'd with ANLPAR 176 * 177 * A small helper function for a common case. Returns one 178 * if the media is operating or locked at full duplex, and 179 * returns zero otherwise. 180 */ 181static inline unsigned int mii_duplex (unsigned int duplex_lock, 182 unsigned int negotiated) 183{ 184 if (duplex_lock) 185 return 1; 186 if (mii_nway_result(negotiated) & LPA_DUPLEX) 187 return 1; 188 return 0; 189} 190 191#endif /* __LINUX_MII_H__ */ 192