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/*
* 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__ */
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