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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#include <linux/if.h>
13
14/* Generic MII registers. */
15
16#define MII_BMCR 0x00 /* Basic mode control register */
17#define MII_BMSR 0x01 /* Basic mode status register */
18#define MII_PHYSID1 0x02 /* PHYS ID 1 */
19#define MII_PHYSID2 0x03 /* PHYS ID 2 */
20#define MII_ADVERTISE 0x04 /* Advertisement control reg */
21#define MII_LPA 0x05 /* Link partner ability reg */
22#define MII_EXPANSION 0x06 /* Expansion register */
23#define MII_CTRL1000 0x09 /* 1000BASE-T control */
24#define MII_STAT1000 0x0a /* 1000BASE-T 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 0x07c0 /* Unused... */
58#define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */
59#define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */
60#define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */
61#define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */
62#define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */
63
64/* Advertisement control register. */
65#define ADVERTISE_SLCT 0x001f /* Selector bits */
66#define ADVERTISE_CSMA 0x0001 /* Only selector supported */
67#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
68#define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */
69#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
70#define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */
71#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
72#define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */
73#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
74#define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */
75#define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */
76#define ADVERTISE_PAUSE_CAP 0x0400 /* Try for pause */
77#define ADVERTISE_PAUSE_ASYM 0x0800 /* Try for asymetric pause */
78#define ADVERTISE_RESV 0x1000 /* Unused... */
79#define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */
80#define ADVERTISE_LPACK 0x4000 /* Ack link partners response */
81#define ADVERTISE_NPAGE 0x8000 /* Next page bit */
82
83#define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
84 ADVERTISE_CSMA)
85#define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
86 ADVERTISE_100HALF | ADVERTISE_100FULL)
87
88/* Link partner ability register. */
89#define LPA_SLCT 0x001f /* Same as advertise selector */
90#define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */
91#define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */
92#define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
93#define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */
94#define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */
95#define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */
96#define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */
97#define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/
98#define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */
99#define LPA_PAUSE_CAP 0x0400 /* Can pause */
100#define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */
101#define LPA_RESV 0x1000 /* Unused... */
102#define LPA_RFAULT 0x2000 /* Link partner faulted */
103#define LPA_LPACK 0x4000 /* Link partner acked us */
104#define LPA_NPAGE 0x8000 /* Next page bit */
105
106#define LPA_DUPLEX (LPA_10FULL | LPA_100FULL)
107#define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
108
109/* Expansion register for auto-negotiation. */
110#define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */
111#define EXPANSION_LCWP 0x0002 /* Got new RX page code word */
112#define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */
113#define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */
114#define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */
115#define EXPANSION_RESV 0xffe0 /* Unused... */
116
117/* N-way test register. */
118#define NWAYTEST_RESV1 0x00ff /* Unused... */
119#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
120#define NWAYTEST_RESV2 0xfe00 /* Unused... */
121
122/* 1000BASE-T Control register */
123#define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */
124#define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */
125
126/* 1000BASE-T Status register */
127#define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */
128#define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */
129#define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */
130#define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */
131
132struct mii_if_info {
133 int phy_id;
134 int advertising;
135 int phy_id_mask;
136 int reg_num_mask;
137
138 unsigned int full_duplex : 1; /* is full duplex? */
139 unsigned int force_media : 1; /* is autoneg. disabled? */
140 unsigned int supports_gmii : 1; /* are GMII registers supported? */
141
142 struct net_device *dev;
143 int (*mdio_read) (struct net_device *dev, int phy_id, int location);
144 void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
145};
146
147struct ethtool_cmd;
148struct mii_ioctl_data;
149
150extern int mii_link_ok (struct mii_if_info *mii);
151extern int mii_nway_restart (struct mii_if_info *mii);
152extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
153extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
154extern void mii_check_link (struct mii_if_info *mii);
155extern unsigned int mii_check_media (struct mii_if_info *mii,
156 unsigned int ok_to_print,
157 unsigned int init_media);
158extern int generic_mii_ioctl(struct mii_if_info *mii_if,
159 struct mii_ioctl_data *mii_data, int cmd,
160 unsigned int *duplex_changed);
161
162
163
164/* This structure is used in all SIOCxMIIxxx ioctl calls */
165struct mii_ioctl_data {
166 u16 phy_id;
167 u16 reg_num;
168 u16 val_in;
169 u16 val_out;
170};
171
172
173static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
174{
175 return (struct mii_ioctl_data *) &rq->ifr_ifru;
176}
177
178
179/**
180 * mii_nway_result
181 * @negotiated: value of MII ANAR and'd with ANLPAR
182 *
183 * Given a set of MII abilities, check each bit and returns the
184 * currently supported media, in the priority order defined by
185 * IEEE 802.3u. We use LPA_xxx constants but note this is not the
186 * value of LPA solely, as described above.
187 *
188 * The one exception to IEEE 802.3u is that 100baseT4 is placed
189 * between 100T-full and 100T-half. If your phy does not support
190 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
191 * priority order, you will need to roll your own function.
192 */
193static inline unsigned int mii_nway_result (unsigned int negotiated)
194{
195 unsigned int ret;
196
197 if (negotiated & LPA_100FULL)
198 ret = LPA_100FULL;
199 else if (negotiated & LPA_100BASE4)
200 ret = LPA_100BASE4;
201 else if (negotiated & LPA_100HALF)
202 ret = LPA_100HALF;
203 else if (negotiated & LPA_10FULL)
204 ret = LPA_10FULL;
205 else
206 ret = LPA_10HALF;
207
208 return ret;
209}
210
211/**
212 * mii_duplex
213 * @duplex_lock: Non-zero if duplex is locked at full
214 * @negotiated: value of MII ANAR and'd with ANLPAR
215 *
216 * A small helper function for a common case. Returns one
217 * if the media is operating or locked at full duplex, and
218 * returns zero otherwise.
219 */
220static inline unsigned int mii_duplex (unsigned int duplex_lock,
221 unsigned int negotiated)
222{
223 if (duplex_lock)
224 return 1;
225 if (mii_nway_result(negotiated) & LPA_DUPLEX)
226 return 1;
227 return 0;
228}
229
230
231#endif /* __LINUX_MII_H__ */