aboutsummaryrefslogtreecommitdiff
path: root/include/linux/mii.h
blob: 7c63095fd4331e66107b5ea1b3c835c213df1ec1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
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__ */