| Haavard Skinnemoen | 91975b0 | 2006-12-17 15:46:02 +0100 | [diff] [blame^] | 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__ */ |