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 /* Generic MII registers. */
12
13 #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 */
31
32 /* Basic mode control register. */
33 #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 */
44
45 /* Basic mode status register. */
46 #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 */
58
59 /* Advertisement control register. */
60 #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 */
71
72 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
73 ADVERTISE_CSMA)
74 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
75 ADVERTISE_100HALF | ADVERTISE_100FULL)
76
77 /* Link partner ability register. */
78 #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 */
88
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. */
93 #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... */
99
100 /* N-way test register. */
101 #define NWAYTEST_RESV1 0x00ff /* Unused... */
102 #define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
103 #define NWAYTEST_RESV2 0xfe00 /* Unused... */
104
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
117 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
118 * priority order, you will need to roll your own function.
119 */
mii_nway_result(unsigned int negotiated)120 static 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 */
mii_duplex(unsigned int duplex_lock,unsigned int negotiated)147 static 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__ */
159