summaryrefslogtreecommitdiffstats
path: root/include/linux/mii.h
blob: 103113a2fd187df38ee8362c6a720a2ab8c6f170 (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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
/*
 * 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__

#include <linux/types.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_CTRL1000        0x09        /* 1000BASE-T control          */
#define MII_STAT1000        0x0a        /* 1000BASE-T status           */
#define MII_ESTATUS	    0x0f	/* Extended Status */
#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               0x00c0  /* Unused...                   */
#define BMSR_ESTATEN		0x0100	/* Extended Status in R15 */
#define BMSR_100HALF2           0x0200  /* Can do 100BASE-T2 HDX */
#define BMSR_100FULL2           0x0400  /* Can do 100BASE-T2 FDX */
#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_1000XFULL     0x0020  /* Try for 1000BASE-X full-duplex */
#define ADVERTISE_10FULL        0x0040  /* Try for 10mbps full-duplex  */
#define ADVERTISE_1000XHALF     0x0040  /* Try for 1000BASE-X half-duplex */
#define ADVERTISE_100HALF       0x0080  /* Try for 100mbps half-duplex */
#define ADVERTISE_1000XPAUSE    0x0080  /* Try for 1000BASE-X pause    */
#define ADVERTISE_100FULL       0x0100  /* Try for 100mbps full-duplex */
#define ADVERTISE_1000XPSE_ASYM 0x0100  /* Try for 1000BASE-X asym pause */
#define ADVERTISE_100BASE4      0x0200  /* Try for 100mbps 4k packets  */
#define ADVERTISE_PAUSE_CAP     0x0400  /* Try for pause               */
#define ADVERTISE_PAUSE_ASYM    0x0800  /* Try for asymetric pause     */
#define ADVERTISE_RESV          0x1000  /* 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_1000XFULL           0x0020  /* Can do 1000BASE-X full-duplex */
#define LPA_10FULL              0x0040  /* Can do 10mbps full-duplex   */
#define LPA_1000XHALF           0x0040  /* Can do 1000BASE-X half-duplex */
#define LPA_100HALF             0x0080  /* Can do 100mbps half-duplex  */
#define LPA_1000XPAUSE          0x0080  /* Can do 1000BASE-X pause     */
#define LPA_100FULL             0x0100  /* Can do 100mbps full-duplex  */
#define LPA_1000XPAUSE_ASYM     0x0100  /* Can do 1000BASE-X pause asym*/
#define LPA_100BASE4            0x0200  /* Can do 100mbps 4k packets   */
#define LPA_PAUSE_CAP           0x0400  /* Can pause                   */
#define LPA_PAUSE_ASYM          0x0800  /* Can pause asymetrically     */
#define LPA_RESV                0x1000  /* 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...                   */

#define ESTATUS_1000_TFULL	0x2000	/* Can do 1000BT Full */
#define ESTATUS_1000_THALF	0x1000	/* Can do 1000BT Half */

/* N-way test register. */
#define NWAYTEST_RESV1          0x00ff  /* Unused...                   */
#define NWAYTEST_LOOPBACK       0x0100  /* Enable loopback for N-way   */
#define NWAYTEST_RESV2          0xfe00  /* Unused...                   */

/* 1000BASE-T Control register */
#define ADVERTISE_1000FULL      0x0200  /* Advertise 1000BASE-T full duplex */
#define ADVERTISE_1000HALF      0x0100  /* Advertise 1000BASE-T half duplex */
#define CTL1000_AS_MASTER	0x0800
#define CTL1000_ENABLE_MASTER	0x1000

/* 1000BASE-T Status register */
#define LPA_1000LOCALRXOK       0x2000  /* Link partner local receiver status */
#define LPA_1000REMRXOK         0x1000  /* Link partner remote receiver status */
#define LPA_1000FULL            0x0800  /* Link partner 1000BASE-T full duplex */
#define LPA_1000HALF            0x0400  /* Link partner 1000BASE-T half duplex */

/* Flow control flags */
#define FLOW_CTRL_TX		0x01
#define FLOW_CTRL_RX		0x02

/* This structure is used in all SIOCxMIIxxx ioctl calls */
struct mii_ioctl_data {
	__u16		phy_id;
	__u16		reg_num;
	__u16		val_in;
	__u16		val_out;
};

#ifdef __KERNEL__ 

#include <linux/if.h>

struct ethtool_cmd;

struct mii_if_info {
	int phy_id;
	int advertising;
	int phy_id_mask;
	int reg_num_mask;

	unsigned int full_duplex : 1;	/* is full duplex? */
	unsigned int force_media : 1;	/* is autoneg. disabled? */
	unsigned int supports_gmii : 1; /* are GMII registers supported? */

	struct net_device *dev;
	int (*mdio_read) (struct net_device *dev, int phy_id, int location);
	void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
};

extern int mii_link_ok (struct mii_if_info *mii);
extern int mii_nway_restart (struct mii_if_info *mii);
extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
extern int mii_check_gmii_support(struct mii_if_info *mii);
extern void mii_check_link (struct mii_if_info *mii);
extern unsigned int mii_check_media (struct mii_if_info *mii,
				     unsigned int ok_to_print,
				     unsigned int init_media);
extern int generic_mii_ioctl(struct mii_if_info *mii_if,
                      	     struct mii_ioctl_data *mii_data, int cmd,
			     unsigned int *duplex_changed);


static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
{
	return (struct mii_ioctl_data *) &rq->ifr_ifru;
}


/**
 * 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;
}

/**
 * mii_advertise_flowctrl - get flow control advertisement flags
 * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
 */
static inline u16 mii_advertise_flowctrl(int cap)
{
	u16 adv = 0;

	if (cap & FLOW_CTRL_RX)
		adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
	if (cap & FLOW_CTRL_TX)
		adv ^= ADVERTISE_PAUSE_ASYM;

	return adv;
}

/**
 * mii_resolve_flowctrl_fdx
 * @lcladv: value of MII ADVERTISE register
 * @rmtadv: value of MII LPA register
 *
 * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
 */
static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
{
	u8 cap = 0;

	if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
		cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
	} else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
		if (lcladv & ADVERTISE_PAUSE_CAP)
			cap = FLOW_CTRL_RX;
		else if (rmtadv & ADVERTISE_PAUSE_CAP)
			cap = FLOW_CTRL_TX;
	}

	return cap;
}

#endif /* __KERNEL__ */
#endif /* __LINUX_MII_H__ */
OpenPOWER on IntegriCloud