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 #include <linux/types.h>
12
13 /* Generic MII registers. */
14
15 #define MII_BMCR 0x00 /* Basic mode control register */
16 #define MII_BMSR 0x01 /* Basic mode status register */
17 #define MII_PHYSID1 0x02 /* PHYS ID 1 */
18 #define MII_PHYSID2 0x03 /* PHYS ID 2 */
19 #define MII_ADVERTISE 0x04 /* Advertisement control reg */
20 #define MII_LPA 0x05 /* Link partner ability reg */
21 #define MII_EXPANSION 0x06 /* Expansion register */
22 #define MII_DCOUNTER 0x12 /* Disconnect counter */
23 #define MII_FCSCOUNTER 0x13 /* False carrier counter */
24 #define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */
25 #define MII_RERRCOUNTER 0x15 /* Receive error counter */
26 #define MII_SREVISION 0x16 /* Silicon revision */
27 #define MII_RESV1 0x17 /* Reserved... */
28 #define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */
29 #define MII_PHYADDR 0x19 /* PHY address */
30 #define MII_RESV2 0x1a /* Reserved... */
31 #define MII_TPISTATUS 0x1b /* TPI status for 10mbps */
32 #define MII_NCONFIG 0x1c /* Network interface config */
33
34 /* Basic mode control register. */
35 #define BMCR_RESV 0x007f /* Unused... */
36 #define BMCR_CTST 0x0080 /* Collision test */
37 #define BMCR_FULLDPLX 0x0100 /* Full duplex */
38 #define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */
39 #define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */
40 #define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */
41 #define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */
42 #define BMCR_SPEED100 0x2000 /* Select 100Mbps */
43 #define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */
44 #define BMCR_RESET 0x8000 /* Reset the DP83840 */
45
46 /* Basic mode status register. */
47 #define BMSR_ERCAP 0x0001 /* Ext-reg capability */
48 #define BMSR_JCD 0x0002 /* Jabber detected */
49 #define BMSR_LSTATUS 0x0004 /* Link status */
50 #define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */
51 #define BMSR_RFAULT 0x0010 /* Remote fault detected */
52 #define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */
53 #define BMSR_RESV 0x07c0 /* Unused... */
54 #define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */
55 #define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */
56 #define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */
57 #define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */
58 #define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */
59
60 /* Advertisement control register. */
61 #define ADVERTISE_SLCT 0x001f /* Selector bits */
62 #define ADVERTISE_CSMA 0x0001 /* Only selector supported */
63 #define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
64 #define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
65 #define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
66 #define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
67 #define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */
68 #define ADVERTISE_RESV 0x1c00 /* Unused... */
69 #define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */
70 #define ADVERTISE_LPACK 0x4000 /* Ack link partners response */
71 #define ADVERTISE_NPAGE 0x8000 /* Next page bit */
72
73 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
74 ADVERTISE_CSMA)
75 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
76 ADVERTISE_100HALF | ADVERTISE_100FULL)
77
78 /* Link partner ability register. */
79 #define LPA_SLCT 0x001f /* Same as advertise selector */
80 #define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */
81 #define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
82 #define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */
83 #define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */
84 #define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */
85 #define LPA_RESV 0x1c00 /* Unused... */
86 #define LPA_RFAULT 0x2000 /* Link partner faulted */
87 #define LPA_LPACK 0x4000 /* Link partner acked us */
88 #define LPA_NPAGE 0x8000 /* Next page bit */
89
90 #define LPA_DUPLEX (LPA_10FULL | LPA_100FULL)
91 #define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
92
93 /* Expansion register for auto-negotiation. */
94 #define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */
95 #define EXPANSION_LCWP 0x0002 /* Got new RX page code word */
96 #define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */
97 #define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */
98 #define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */
99 #define EXPANSION_RESV 0xffe0 /* Unused... */
100
101 /* N-way test register. */
102 #define NWAYTEST_RESV1 0x00ff /* Unused... */
103 #define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
104 #define NWAYTEST_RESV2 0xfe00 /* Unused... */
105
106 /* This structure is used in all SIOCxMIIxxx ioctl calls */
107 struct mii_ioctl_data {
108 __u16 phy_id;
109 __u16 reg_num;
110 __u16 val_in;
111 __u16 val_out;
112 };
113
114 #ifdef __KERNEL__
115
116 #include <linux/if.h>
117
118 struct ethtool_cmd;
119
120 struct mii_if_info {
121 int phy_id;
122 int advertising;
123 int phy_id_mask;
124 int reg_num_mask;
125
126 unsigned int full_duplex : 1; /* is full duplex? */
127 unsigned int force_media : 1; /* is autoneg. disabled? */
128
129 struct net_device *dev;
130 int (*mdio_read) (struct net_device *dev, int phy_id, int location);
131 void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
132 };
133
134 extern int mii_link_ok (struct mii_if_info *mii);
135 extern int mii_nway_restart (struct mii_if_info *mii);
136 extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
137 extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
138 extern void mii_check_link (struct mii_if_info *mii);
139 extern unsigned int mii_check_media (struct mii_if_info *mii,
140 unsigned int ok_to_print,
141 unsigned int init_media);
142 extern int generic_mii_ioctl(struct mii_if_info *mii_if,
143 struct mii_ioctl_data *mii_data, int cmd,
144 unsigned int *duplex_changed);
145
146
if_mii(struct ifreq * rq)147 static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
148 {
149 return (struct mii_ioctl_data *) &rq->ifr_ifru;
150 }
151
152
153 /**
154 * mii_nway_result
155 * @negotiated: value of MII ANAR and'd with ANLPAR
156 *
157 * Given a set of MII abilities, check each bit and returns the
158 * currently supported media, in the priority order defined by
159 * IEEE 802.3u. We use LPA_xxx constants but note this is not the
160 * value of LPA solely, as described above.
161 *
162 * The one exception to IEEE 802.3u is that 100baseT4 is placed
163 * between 100T-full and 100T-half. If your phy does not support
164 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
165 * priority order, you will need to roll your own function.
166 */
mii_nway_result(unsigned int negotiated)167 static inline unsigned int mii_nway_result (unsigned int negotiated)
168 {
169 unsigned int ret;
170
171 if (negotiated & LPA_100FULL)
172 ret = LPA_100FULL;
173 else if (negotiated & LPA_100BASE4)
174 ret = LPA_100BASE4;
175 else if (negotiated & LPA_100HALF)
176 ret = LPA_100HALF;
177 else if (negotiated & LPA_10FULL)
178 ret = LPA_10FULL;
179 else
180 ret = LPA_10HALF;
181
182 return ret;
183 }
184
185 /**
186 * mii_duplex
187 * @duplex_lock: Non-zero if duplex is locked at full
188 * @negotiated: value of MII ANAR and'd with ANLPAR
189 *
190 * A small helper function for a common case. Returns one
191 * if the media is operating or locked at full duplex, and
192 * returns zero otherwise.
193 */
mii_duplex(unsigned int duplex_lock,unsigned int negotiated)194 static inline unsigned int mii_duplex (unsigned int duplex_lock,
195 unsigned int negotiated)
196 {
197 if (duplex_lock)
198 return 1;
199 if (mii_nway_result(negotiated) & LPA_DUPLEX)
200 return 1;
201 return 0;
202 }
203
204 #endif /* __KERNEL__ */
205 #endif /* __LINUX_MII_H__ */
206