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_XFULL 0x8000 /* Can do 1000BX Full */ 119 #define ESTATUS_1000_XHALF 0x4000 /* Can do 1000BX Half */ 120 #define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */ 121 #define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */ 122 123 /* N-way test register. */ 124 #define NWAYTEST_RESV1 0x00ff /* Unused... */ 125 #define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */ 126 #define NWAYTEST_RESV2 0xfe00 /* Unused... */ 127 128 /* 1000BASE-T Control register */ 129 #define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */ 130 #define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */ 131 132 /* 1000BASE-T Status register */ 133 #define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */ 134 #define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */ 135 #define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */ 136 #define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */ 137 138 /* Flow control flags */ 139 #define FLOW_CTRL_TX 0x01 140 #define FLOW_CTRL_RX 0x02 141 142 /** 143 * mii_nway_result 144 * @negotiated: value of MII ANAR and'd with ANLPAR 145 * 146 * Given a set of MII abilities, check each bit and returns the 147 * currently supported media, in the priority order defined by 148 * IEEE 802.3u. We use LPA_xxx constants but note this is not the 149 * value of LPA solely, as described above. 150 * 151 * The one exception to IEEE 802.3u is that 100baseT4 is placed 152 * between 100T-full and 100T-half. If your phy does not support 153 * 100T4 this is fine. If your phy places 100T4 elsewhere in the 154 * priority order, you will need to roll your own function. 155 */ 156 static inline unsigned int mii_nway_result (unsigned int negotiated) 157 { 158 unsigned int ret; 159 160 if (negotiated & LPA_100FULL) 161 ret = LPA_100FULL; 162 else if (negotiated & LPA_100BASE4) 163 ret = LPA_100BASE4; 164 else if (negotiated & LPA_100HALF) 165 ret = LPA_100HALF; 166 else if (negotiated & LPA_10FULL) 167 ret = LPA_10FULL; 168 else 169 ret = LPA_10HALF; 170 171 return ret; 172 } 173 174 /** 175 * mii_duplex 176 * @duplex_lock: Non-zero if duplex is locked at full 177 * @negotiated: value of MII ANAR and'd with ANLPAR 178 * 179 * A small helper function for a common case. Returns one 180 * if the media is operating or locked at full duplex, and 181 * returns zero otherwise. 182 */ 183 static inline unsigned int mii_duplex (unsigned int duplex_lock, 184 unsigned int negotiated) 185 { 186 if (duplex_lock) 187 return 1; 188 if (mii_nway_result(negotiated) & LPA_DUPLEX) 189 return 1; 190 return 0; 191 } 192 193 /** 194 * mii_resolve_flowctrl_fdx 195 * @lcladv: value of MII ADVERTISE register 196 * @rmtadv: value of MII LPA register 197 * 198 * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3 199 */ 200 static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv) 201 { 202 u8 cap = 0; 203 204 if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) { 205 cap = FLOW_CTRL_TX | FLOW_CTRL_RX; 206 } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) { 207 if (lcladv & ADVERTISE_PAUSE_CAP) 208 cap = FLOW_CTRL_RX; 209 else if (rmtadv & ADVERTISE_PAUSE_CAP) 210 cap = FLOW_CTRL_TX; 211 } 212 213 return cap; 214 } 215 216 #endif /* __LINUX_MII_H__ */ 217