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_CTRL1000 0x09 /* 1000BASE-T control */
23 #define MII_STAT1000 0x0a /* 1000BASE-T status */
24 #define MII_ESTATUS 0x0f /* Extended Status */
25 #define MII_DCOUNTER 0x12 /* Disconnect counter */
26 #define MII_FCSCOUNTER 0x13 /* False carrier counter */
27 #define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */
28 #define MII_RERRCOUNTER 0x15 /* Receive error counter */
29 #define MII_SREVISION 0x16 /* Silicon revision */
30 #define MII_RESV1 0x17 /* Reserved... */
31 #define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */
32 #define MII_PHYADDR 0x19 /* PHY address */
33 #define MII_RESV2 0x1a /* Reserved... */
34 #define MII_TPISTATUS 0x1b /* TPI status for 10mbps */
35 #define MII_NCONFIG 0x1c /* Network interface config */
36
37 /* Basic mode control register. */
38 #define BMCR_RESV 0x003f /* Unused... */
39 #define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */
40 #define BMCR_CTST 0x0080 /* Collision test */
41 #define BMCR_FULLDPLX 0x0100 /* Full duplex */
42 #define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */
43 #define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */
44 #define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */
45 #define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */
46 #define BMCR_SPEED100 0x2000 /* Select 100Mbps */
47 #define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */
48 #define BMCR_RESET 0x8000 /* Reset the DP83840 */
49
50 /* Basic mode status register. */
51 #define BMSR_ERCAP 0x0001 /* Ext-reg capability */
52 #define BMSR_JCD 0x0002 /* Jabber detected */
53 #define BMSR_LSTATUS 0x0004 /* Link status */
54 #define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */
55 #define BMSR_RFAULT 0x0010 /* Remote fault detected */
56 #define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */
57 #define BMSR_RESV 0x00c0 /* Unused... */
58 #define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */
59 #define BMSR_100HALF2 0x0200 /* Can do 100BASE-T2 HDX */
60 #define BMSR_100FULL2 0x0400 /* Can do 100BASE-T2 FDX */
61 #define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */
62 #define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */
63 #define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */
64 #define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */
65 #define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */
66
67 /* Advertisement control register. */
68 #define ADVERTISE_SLCT 0x001f /* Selector bits */
69 #define ADVERTISE_CSMA 0x0001 /* Only selector supported */
70 #define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
71 #define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */
72 #define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
73 #define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */
74 #define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
75 #define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */
76 #define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
77 #define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */
78 #define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */
79 #define ADVERTISE_PAUSE_CAP 0x0400 /* Try for pause */
80 #define ADVERTISE_PAUSE_ASYM 0x0800 /* Try for asymetric pause */
81 #define ADVERTISE_RESV 0x1000 /* Unused... */
82 #define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */
83 #define ADVERTISE_LPACK 0x4000 /* Ack link partners response */
84 #define ADVERTISE_NPAGE 0x8000 /* Next page bit */
85
86 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
87 ADVERTISE_CSMA)
88 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
89 ADVERTISE_100HALF | ADVERTISE_100FULL)
90
91 /* Link partner ability register. */
92 #define LPA_SLCT 0x001f /* Same as advertise selector */
93 #define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */
94 #define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */
95 #define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
96 #define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */
97 #define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */
98 #define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */
99 #define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */
100 #define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/
101 #define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */
102 #define LPA_PAUSE_CAP 0x0400 /* Can pause */
103 #define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */
104 #define LPA_RESV 0x1000 /* Unused... */
105 #define LPA_RFAULT 0x2000 /* Link partner faulted */
106 #define LPA_LPACK 0x4000 /* Link partner acked us */
107 #define LPA_NPAGE 0x8000 /* Next page bit */
108
109 #define LPA_DUPLEX (LPA_10FULL | LPA_100FULL)
110 #define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
111
112 /* Expansion register for auto-negotiation. */
113 #define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */
114 #define EXPANSION_LCWP 0x0002 /* Got new RX page code word */
115 #define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */
116 #define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */
117 #define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */
118 #define EXPANSION_RESV 0xffe0 /* Unused... */
119
120 #define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */
121 #define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */
122
123 /* N-way test register. */
124 #define NWAYTEST_RESV1 0x00ff /* Unused... */
125 #define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
126 #define NWAYTEST_RESV2 0xfe00 /* Unused... */
127
128 /* 1000BASE-T Control register */
129 #define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */
130 #define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */
131
132 /* 1000BASE-T Status register */
133 #define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */
134 #define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */
135 #define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */
136 #define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */
137
138 /* This structure is used in all SIOCxMIIxxx ioctl calls */
139 struct mii_ioctl_data {
140 __u16 phy_id;
141 __u16 reg_num;
142 __u16 val_in;
143 __u16 val_out;
144 };
145
146 #ifdef __KERNEL__
147
148 #include <linux/if.h>
149
150 struct ethtool_cmd;
151
152 struct mii_if_info {
153 int phy_id;
154 int advertising;
155 int phy_id_mask;
156 int reg_num_mask;
157
158 unsigned int full_duplex : 1; /* is full duplex? */
159 unsigned int force_media : 1; /* is autoneg. disabled? */
160 unsigned int supports_gmii : 1; /* are GMII registers supported? */
161
162 struct net_device *dev;
163 int (*mdio_read) (struct net_device *dev, int phy_id, int location);
164 void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
165 };
166
167 extern int mii_link_ok (struct mii_if_info *mii);
168 extern int mii_nway_restart (struct mii_if_info *mii);
169 extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
170 extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
171 extern int mii_check_gmii_support(struct mii_if_info *mii);
172 extern void mii_check_link (struct mii_if_info *mii);
173 extern unsigned int mii_check_media (struct mii_if_info *mii,
174 unsigned int ok_to_print,
175 unsigned int init_media);
176 extern int generic_mii_ioctl(struct mii_if_info *mii_if,
177 struct mii_ioctl_data *mii_data, int cmd,
178 unsigned int *duplex_changed);
179
180
181 static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
182 {
183 return (struct mii_ioctl_data *) &rq->ifr_ifru;
184 }
185
186
187 /**
188 * mii_nway_result
189 * @negotiated: value of MII ANAR and'd with ANLPAR
190 *
191 * Given a set of MII abilities, check each bit and returns the
192 * currently supported media, in the priority order defined by
193 * IEEE 802.3u. We use LPA_xxx constants but note this is not the
194 * value of LPA solely, as described above.
195 *
196 * The one exception to IEEE 802.3u is that 100baseT4 is placed
197 * between 100T-full and 100T-half. If your phy does not support
198 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
199 * priority order, you will need to roll your own function.
200 */
201 static inline unsigned int mii_nway_result (unsigned int negotiated)
202 {
203 unsigned int ret;
204
205 if (negotiated & LPA_100FULL)
206 ret = LPA_100FULL;
207 else if (negotiated & LPA_100BASE4)
208 ret = LPA_100BASE4;
209 else if (negotiated & LPA_100HALF)
210 ret = LPA_100HALF;
211 else if (negotiated & LPA_10FULL)
212 ret = LPA_10FULL;
213 else
214 ret = LPA_10HALF;
215
216 return ret;
217 }
218
219 /**
220 * mii_duplex
221 * @duplex_lock: Non-zero if duplex is locked at full
222 * @negotiated: value of MII ANAR and'd with ANLPAR
223 *
224 * A small helper function for a common case. Returns one
225 * if the media is operating or locked at full duplex, and
226 * returns zero otherwise.
227 */
228 static inline unsigned int mii_duplex (unsigned int duplex_lock,
229 unsigned int negotiated)
230 {
231 if (duplex_lock)
232 return 1;
233 if (mii_nway_result(negotiated) & LPA_DUPLEX)
234 return 1;
235 return 0;
236 }
237
238 #endif /* __KERNEL__ */
239 #endif /* __LINUX_MII_H__ */
240
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