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_DCOUNTER 0x12 /* Disconnect counter */ 21 #define MII_FCSCOUNTER 0x13 /* False carrier counter */ 22 #define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */ 23 #define MII_RERRCOUNTER 0x15 /* Receive error counter */ 24 #define MII_SREVISION 0x16 /* Silicon revision */ 25 #define MII_RESV1 0x17 /* Reserved... */ 26 #define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */ 27 #define MII_PHYADDR 0x19 /* PHY address */ 28 #define MII_RESV2 0x1a /* Reserved... */ 29 #define MII_TPISTATUS 0x1b /* TPI status for 10mbps */ 30 #define MII_NCONFIG 0x1c /* Network interface config */ 31 32 /* Basic mode control register. */ 33 #define BMCR_RESV 0x003f /* Unused... */ 34 #define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */ 35 #define BMCR_CTST 0x0080 /* Collision test */ 36 #define BMCR_FULLDPLX 0x0100 /* Full duplex */ 37 #define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */ 38 #define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */ 39 #define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */ 40 #define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */ 41 #define BMCR_SPEED100 0x2000 /* Select 100Mbps */ 42 #define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */ 43 #define BMCR_RESET 0x8000 /* Reset the DP83840 */ 44 45 /* Basic mode status register. */ 46 #define BMSR_ERCAP 0x0001 /* Ext-reg capability */ 47 #define BMSR_JCD 0x0002 /* Jabber detected */ 48 #define BMSR_LSTATUS 0x0004 /* Link status */ 49 #define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */ 50 #define BMSR_RFAULT 0x0010 /* Remote fault detected */ 51 #define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */ 52 #define BMSR_RESV 0x07c0 /* Unused... */ 53 #define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */ 54 #define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */ 55 #define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */ 56 #define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */ 57 #define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */ 58 59 /* Advertisement control register. */ 60 #define ADVERTISE_SLCT 0x001f /* Selector bits */ 61 #define ADVERTISE_CSMA 0x0001 /* Only selector supported */ 62 #define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */ 63 #define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */ 64 #define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */ 65 #define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */ 66 #define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */ 67 #define ADVERTISE_RESV 0x1c00 /* Unused... */ 68 #define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */ 69 #define ADVERTISE_LPACK 0x4000 /* Ack link partners response */ 70 #define ADVERTISE_NPAGE 0x8000 /* Next page bit */ 71 72 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \ 73 ADVERTISE_CSMA) 74 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \ 75 ADVERTISE_100HALF | ADVERTISE_100FULL) 76 77 /* Link partner ability register. */ 78 #define LPA_SLCT 0x001f /* Same as advertise selector */ 79 #define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */ 80 #define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */ 81 #define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */ 82 #define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */ 83 #define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */ 84 #define LPA_RESV 0x1c00 /* Unused... */ 85 #define LPA_RFAULT 0x2000 /* Link partner faulted */ 86 #define LPA_LPACK 0x4000 /* Link partner acked us */ 87 #define LPA_NPAGE 0x8000 /* Next page bit */ 88 89 #define LPA_DUPLEX (LPA_10FULL | LPA_100FULL) 90 #define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4) 91 92 /* Expansion register for auto-negotiation. */ 93 #define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */ 94 #define EXPANSION_LCWP 0x0002 /* Got new RX page code word */ 95 #define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */ 96 #define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */ 97 #define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */ 98 #define EXPANSION_RESV 0xffe0 /* Unused... */ 99 100 /* N-way test register. */ 101 #define NWAYTEST_RESV1 0x00ff /* Unused... */ 102 #define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */ 103 #define NWAYTEST_RESV2 0xfe00 /* Unused... */ 104 105 106 /** 107 * mii_nway_result 108 * @negotiated: value of MII ANAR and'd with ANLPAR 109 * 110 * Given a set of MII abilities, check each bit and returns the 111 * currently supported media, in the priority order defined by 112 * IEEE 802.3u. We use LPA_xxx constants but note this is not the 113 * value of LPA solely, as described above. 114 * 115 * The one exception to IEEE 802.3u is that 100baseT4 is placed 116 * between 100T-full and 100T-half. If your phy does not support 117 * 100T4 this is fine. If your phy places 100T4 elsewhere in the 118 * priority order, you will need to roll your own function. 119 */ 120 static inline unsigned int mii_nway_result (unsigned int negotiated) 121 { 122 unsigned int ret; 123 124 if (negotiated & LPA_100FULL) 125 ret = LPA_100FULL; 126 else if (negotiated & LPA_100BASE4) 127 ret = LPA_100BASE4; 128 else if (negotiated & LPA_100HALF) 129 ret = LPA_100HALF; 130 else if (negotiated & LPA_10FULL) 131 ret = LPA_10FULL; 132 else 133 ret = LPA_10HALF; 134 135 return ret; 136 } 137 138 /** 139 * mii_duplex 140 * @duplex_lock: Non-zero if duplex is locked at full 141 * @negotiated: value of MII ANAR and'd with ANLPAR 142 * 143 * A small helper function for a common case. Returns one 144 * if the media is operating or locked at full duplex, and 145 * returns zero otherwise. 146 */ 147 static inline unsigned int mii_duplex (unsigned int duplex_lock, 148 unsigned int negotiated) 149 { 150 if (duplex_lock) 151 return 1; 152 if (mii_nway_result(negotiated) & LPA_DUPLEX) 153 return 1; 154 return 0; 155 } 156 157 158 #endif /* __LINUX_MII_H__ */ 159