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| -rw-r--r-- | include/linux/mii.h | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/include/linux/mii.h b/include/linux/mii.h new file mode 100644 index 0000000..5b99168 --- /dev/null +++ b/include/linux/mii.h @@ -0,0 +1,158 @@ +/* + * linux/mii.h: definitions for MII-compatible transceivers + * Originally drivers/net/sunhme.h. + * + * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com) + */ + +#ifndef __LINUX_MII_H__ +#define __LINUX_MII_H__ + +/* Generic MII registers. */ + +#define MII_BMCR 0x00 /* Basic mode control register */ +#define MII_BMSR 0x01 /* Basic mode status register */ +#define MII_PHYSID1 0x02 /* PHYS ID 1 */ +#define MII_PHYSID2 0x03 /* PHYS ID 2 */ +#define MII_ADVERTISE 0x04 /* Advertisement control reg */ +#define MII_LPA 0x05 /* Link partner ability reg */ +#define MII_EXPANSION 0x06 /* Expansion register */ +#define MII_DCOUNTER 0x12 /* Disconnect counter */ +#define MII_FCSCOUNTER 0x13 /* False carrier counter */ +#define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */ +#define MII_RERRCOUNTER 0x15 /* Receive error counter */ +#define MII_SREVISION 0x16 /* Silicon revision */ +#define MII_RESV1 0x17 /* Reserved... */ +#define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */ +#define MII_PHYADDR 0x19 /* PHY address */ +#define MII_RESV2 0x1a /* Reserved... */ +#define MII_TPISTATUS 0x1b /* TPI status for 10mbps */ +#define MII_NCONFIG 0x1c /* Network interface config */ + +/* Basic mode control register. */ +#define BMCR_RESV 0x003f /* Unused... */ +#define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */ +#define BMCR_CTST 0x0080 /* Collision test */ +#define BMCR_FULLDPLX 0x0100 /* Full duplex */ +#define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */ +#define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */ +#define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */ +#define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */ +#define BMCR_SPEED100 0x2000 /* Select 100Mbps */ +#define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */ +#define BMCR_RESET 0x8000 /* Reset the DP83840 */ + +/* Basic mode status register. */ +#define BMSR_ERCAP 0x0001 /* Ext-reg capability */ +#define BMSR_JCD 0x0002 /* Jabber detected */ +#define BMSR_LSTATUS 0x0004 /* Link status */ +#define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */ +#define BMSR_RFAULT 0x0010 /* Remote fault detected */ +#define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */ +#define BMSR_RESV 0x07c0 /* Unused... */ +#define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */ +#define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */ +#define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */ +#define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */ +#define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */ + +/* Advertisement control register. */ +#define ADVERTISE_SLCT 0x001f /* Selector bits */ +#define ADVERTISE_CSMA 0x0001 /* Only selector supported */ +#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */ +#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */ +#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */ +#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */ +#define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */ +#define ADVERTISE_RESV 0x1c00 /* Unused... */ +#define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */ +#define ADVERTISE_LPACK 0x4000 /* Ack link partners response */ +#define ADVERTISE_NPAGE 0x8000 /* Next page bit */ + +#define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \ + ADVERTISE_CSMA) +#define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \ + ADVERTISE_100HALF | ADVERTISE_100FULL) + +/* Link partner ability register. */ +#define LPA_SLCT 0x001f /* Same as advertise selector */ +#define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */ +#define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */ +#define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */ +#define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */ +#define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */ +#define LPA_RESV 0x1c00 /* Unused... */ +#define LPA_RFAULT 0x2000 /* Link partner faulted */ +#define LPA_LPACK 0x4000 /* Link partner acked us */ +#define LPA_NPAGE 0x8000 /* Next page bit */ + +#define LPA_DUPLEX (LPA_10FULL | LPA_100FULL) +#define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4) + +/* Expansion register for auto-negotiation. */ +#define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */ +#define EXPANSION_LCWP 0x0002 /* Got new RX page code word */ +#define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */ +#define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */ +#define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */ +#define EXPANSION_RESV 0xffe0 /* Unused... */ + +/* N-way test register. */ +#define NWAYTEST_RESV1 0x00ff /* Unused... */ +#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */ +#define NWAYTEST_RESV2 0xfe00 /* Unused... */ + + +/** + * mii_nway_result + * @negotiated: value of MII ANAR and'd with ANLPAR + * + * Given a set of MII abilities, check each bit and returns the + * currently supported media, in the priority order defined by + * IEEE 802.3u. We use LPA_xxx constants but note this is not the + * value of LPA solely, as described above. + * + * The one exception to IEEE 802.3u is that 100baseT4 is placed + * between 100T-full and 100T-half. If your phy does not support + * 100T4 this is fine. If your phy places 100T4 elsewhere in the + * priority order, you will need to roll your own function. + */ +static inline unsigned int mii_nway_result (unsigned int negotiated) +{ + unsigned int ret; + + if (negotiated & LPA_100FULL) + ret = LPA_100FULL; + else if (negotiated & LPA_100BASE4) + ret = LPA_100BASE4; + else if (negotiated & LPA_100HALF) + ret = LPA_100HALF; + else if (negotiated & LPA_10FULL) + ret = LPA_10FULL; + else + ret = LPA_10HALF; + + return ret; +} + +/** + * mii_duplex + * @duplex_lock: Non-zero if duplex is locked at full + * @negotiated: value of MII ANAR and'd with ANLPAR + * + * A small helper function for a common case. Returns one + * if the media is operating or locked at full duplex, and + * returns zero otherwise. + */ +static inline unsigned int mii_duplex (unsigned int duplex_lock, + unsigned int negotiated) +{ + if (duplex_lock) + return 1; + if (mii_nway_result(negotiated) & LPA_DUPLEX) + return 1; + return 0; +} + + +#endif /* __LINUX_MII_H__ */ |