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Haavard Skinnemoen91975b02006-12-17 15:46:02 +01001/*
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
Wolfgang Denkb99c1e62007-04-18 16:53:52 +020013#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 */
Haavard Skinnemoen91975b02006-12-17 15:46:02 +010031
32/* Basic mode control register. */
Wolfgang Denkb99c1e62007-04-18 16:53:52 +020033#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 */
Haavard Skinnemoen91975b02006-12-17 15:46:02 +010044
45/* Basic mode status register. */
Wolfgang Denkb99c1e62007-04-18 16:53:52 +020046#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 */
Haavard Skinnemoen91975b02006-12-17 15:46:02 +010058
59/* Advertisement control register. */
Wolfgang Denkb99c1e62007-04-18 16:53:52 +020060#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 */
Haavard Skinnemoen91975b02006-12-17 15:46:02 +010071
72#define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
73 ADVERTISE_CSMA)
74#define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
Wolfgang Denkb99c1e62007-04-18 16:53:52 +020075 ADVERTISE_100HALF | ADVERTISE_100FULL)
Haavard Skinnemoen91975b02006-12-17 15:46:02 +010076
77/* Link partner ability register. */
Wolfgang Denkb99c1e62007-04-18 16:53:52 +020078#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 */
Haavard Skinnemoen91975b02006-12-17 15:46:02 +010088
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. */
Wolfgang Denkb99c1e62007-04-18 16:53:52 +020093#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... */
Haavard Skinnemoen91975b02006-12-17 15:46:02 +010099
100/* N-way test register. */
Wolfgang Denkb99c1e62007-04-18 16:53:52 +0200101#define NWAYTEST_RESV1 0x00ff /* Unused... */
102#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
103#define NWAYTEST_RESV2 0xfe00 /* Unused... */
Haavard Skinnemoen91975b02006-12-17 15:46:02 +0100104
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
Wolfgang Denkb99c1e62007-04-18 16:53:52 +0200117 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
Haavard Skinnemoen91975b02006-12-17 15:46:02 +0100118 * priority order, you will need to roll your own function.
119 */
120static 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 */
147static 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__ */