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#include <linux/types.h> 12 13/* Generic MII registers. */ 14 15#define MII_BMCR 0x00 /* Basic mode control register */ 16#define MII_BMSR 0x01 /* Basic mode status register */ 17#define MII_PHYSID1 0x02 /* PHYS ID 1 */ 18#define MII_PHYSID2 0x03 /* PHYS ID 2 */ 19#define MII_ADVERTISE 0x04 /* Advertisement control reg */ 20#define MII_LPA 0x05 /* Link partner ability reg */ 21#define MII_EXPANSION 0x06 /* Expansion register */ 22#define MII_DCOUNTER 0x12 /* Disconnect counter */ 23#define MII_FCSCOUNTER 0x13 /* False carrier counter */ 24#define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */ 25#define MII_RERRCOUNTER 0x15 /* Receive error counter */ 26#define MII_SREVISION 0x16 /* Silicon revision */ 27#define MII_RESV1 0x17 /* Reserved... */ 28#define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */ 29#define MII_PHYADDR 0x19 /* PHY address */ 30#define MII_RESV2 0x1a /* Reserved... */ 31#define MII_TPISTATUS 0x1b /* TPI status for 10mbps */ 32#define MII_NCONFIG 0x1c /* Network interface config */ 33 34/* Basic mode control register. */ 35#define BMCR_RESV 0x007f /* Unused... */ 36#define BMCR_CTST 0x0080 /* Collision test */ 37#define BMCR_FULLDPLX 0x0100 /* Full duplex */ 38#define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */ 39#define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */ 40#define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */ 41#define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */ 42#define BMCR_SPEED100 0x2000 /* Select 100Mbps */ 43#define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */ 44#define BMCR_RESET 0x8000 /* Reset the DP83840 */ 45 46/* Basic mode status register. */ 47#define BMSR_ERCAP 0x0001 /* Ext-reg capability */ 48#define BMSR_JCD 0x0002 /* Jabber detected */ 49#define BMSR_LSTATUS 0x0004 /* Link status */ 50#define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */ 51#define BMSR_RFAULT 0x0010 /* Remote fault detected */ 52#define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */ 53#define BMSR_RESV 0x07c0 /* Unused... */ 54#define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */ 55#define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */ 56#define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */ 57#define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */ 58#define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */ 59 60/* Advertisement control register. */ 61#define ADVERTISE_SLCT 0x001f /* Selector bits */ 62#define ADVERTISE_CSMA 0x0001 /* Only selector supported */ 63#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */ 64#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */ 65#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */ 66#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */ 67#define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */ 68#define ADVERTISE_RESV 0x1c00 /* Unused... */ 69#define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */ 70#define ADVERTISE_LPACK 0x4000 /* Ack link partners response */ 71#define ADVERTISE_NPAGE 0x8000 /* Next page bit */ 72 73#define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \ 74 ADVERTISE_CSMA) 75#define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \ 76 ADVERTISE_100HALF | ADVERTISE_100FULL) 77 78/* Link partner ability register. */ 79#define LPA_SLCT 0x001f /* Same as advertise selector */ 80#define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */ 81#define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */ 82#define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */ 83#define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */ 84#define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */ 85#define LPA_RESV 0x1c00 /* Unused... */ 86#define LPA_RFAULT 0x2000 /* Link partner faulted */ 87#define LPA_LPACK 0x4000 /* Link partner acked us */ 88#define LPA_NPAGE 0x8000 /* Next page bit */ 89 90#define LPA_DUPLEX (LPA_10FULL | LPA_100FULL) 91#define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4) 92 93/* Expansion register for auto-negotiation. */ 94#define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */ 95#define EXPANSION_LCWP 0x0002 /* Got new RX page code word */ 96#define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */ 97#define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */ 98#define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */ 99#define EXPANSION_RESV 0xffe0 /* Unused... */ 100 101/* N-way test register. */ 102#define NWAYTEST_RESV1 0x00ff /* Unused... */ 103#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */ 104#define NWAYTEST_RESV2 0xfe00 /* Unused... */ 105 106 107struct mii_if_info { 108 int phy_id; 109 int advertising; 110 int phy_id_mask; 111 int reg_num_mask; 112 113 unsigned int full_duplex : 1; /* is full duplex? */ 114 unsigned int force_media : 1; /* is autoneg. disabled? */ 115 116 struct net_device *dev; 117 int (*mdio_read) (struct net_device *dev, int phy_id, int location); 118 void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val); 119}; 120 121struct ethtool_cmd; 122struct mii_ioctl_data; 123 124extern int mii_link_ok (struct mii_if_info *mii); 125extern int mii_nway_restart (struct mii_if_info *mii); 126extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd); 127extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd); 128extern void mii_check_link (struct mii_if_info *mii); 129extern unsigned int mii_check_media (struct mii_if_info *mii, 130 unsigned int ok_to_print, 131 unsigned int init_media); 132extern int generic_mii_ioctl(struct mii_if_info *mii_if, 133 struct mii_ioctl_data *mii_data, int cmd, 134 unsigned int *duplex_changed); 135 136 137 138/* This structure is used in all SIOCxMIIxxx ioctl calls */ 139struct mii_ioctl_data { 140 u16 phy_id; 141 u16 reg_num; 142 u16 val_in; 143 u16 val_out; 144}; 145 146 147/** 148 * mii_nway_result 149 * @negotiated: value of MII ANAR and'd with ANLPAR 150 * 151 * Given a set of MII abilities, check each bit and returns the 152 * currently supported media, in the priority order defined by 153 * IEEE 802.3u. We use LPA_xxx constants but note this is not the 154 * value of LPA solely, as described above. 155 * 156 * The one exception to IEEE 802.3u is that 100baseT4 is placed 157 * between 100T-full and 100T-half. If your phy does not support 158 * 100T4 this is fine. If your phy places 100T4 elsewhere in the 159 * priority order, you will need to roll your own function. 160 */ 161static inline unsigned int mii_nway_result (unsigned int negotiated) 162{ 163 unsigned int ret; 164 165 if (negotiated & LPA_100FULL) 166 ret = LPA_100FULL; 167 else if (negotiated & LPA_100BASE4) 168 ret = LPA_100BASE4; 169 else if (negotiated & LPA_100HALF) 170 ret = LPA_100HALF; 171 else if (negotiated & LPA_10FULL) 172 ret = LPA_10FULL; 173 else 174 ret = LPA_10HALF; 175 176 return ret; 177} 178 179/** 180 * mii_duplex 181 * @duplex_lock: Non-zero if duplex is locked at full 182 * @negotiated: value of MII ANAR and'd with ANLPAR 183 * 184 * A small helper function for a common case. Returns one 185 * if the media is operating or locked at full duplex, and 186 * returns zero otherwise. 187 */ 188static inline unsigned int mii_duplex (unsigned int duplex_lock, 189 unsigned int negotiated) 190{ 191 if (duplex_lock) 192 return 1; 193 if (mii_nway_result(negotiated) & LPA_DUPLEX) 194 return 1; 195 return 0; 196} 197 198 199#endif /* __LINUX_MII_H__ */ 200