aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/sfc/gmii.h
blob: d25bbd1297f40a240025d812fa8de8af8fa8ca1f (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
/****************************************************************************
 * Driver for Solarflare Solarstorm network controllers and boards
 * Copyright 2005-2006 Fen Systems Ltd.
 * Copyright 2006 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */

#ifndef EFX_GMII_H
#define EFX_GMII_H

/*
 * GMII interface
 */

#include <linux/mii.h>

/* GMII registers, excluding registers already defined as MII
 * registers in mii.h
 */
#define GMII_IER		0x12	/* Interrupt enable register */
#define GMII_ISR		0x13	/* Interrupt status register */

/* Interrupt enable register */
#define IER_ANEG_ERR		0x8000	/* Bit 15 - autonegotiation error */
#define IER_SPEED_CHG		0x4000	/* Bit 14 - speed changed */
#define IER_DUPLEX_CHG		0x2000	/* Bit 13 - duplex changed */
#define IER_PAGE_RCVD		0x1000	/* Bit 12 - page received */
#define IER_ANEG_DONE		0x0800	/* Bit 11 - autonegotiation complete */
#define IER_LINK_CHG		0x0400	/* Bit 10 - link status changed */
#define IER_SYM_ERR		0x0200	/* Bit 9 - symbol error */
#define IER_FALSE_CARRIER	0x0100	/* Bit 8 - false carrier */
#define IER_FIFO_ERR		0x0080	/* Bit 7 - FIFO over/underflow */
#define IER_MDIX_CHG		0x0040	/* Bit 6 - MDI crossover changed */
#define IER_DOWNSHIFT		0x0020	/* Bit 5 - downshift */
#define IER_ENERGY		0x0010	/* Bit 4 - energy detect */
#define IER_DTE_POWER		0x0004	/* Bit 2 - DTE power detect */
#define IER_POLARITY_CHG	0x0002	/* Bit 1 - polarity changed */
#define IER_JABBER		0x0001	/* Bit 0 - jabber */

/* Interrupt status register */
#define ISR_ANEG_ERR		0x8000	/* Bit 15 - autonegotiation error */
#define ISR_SPEED_CHG		0x4000	/* Bit 14 - speed changed */
#define ISR_DUPLEX_CHG		0x2000	/* Bit 13 - duplex changed */
#define ISR_PAGE_RCVD		0x1000	/* Bit 12 - page received */
#define ISR_ANEG_DONE		0x0800	/* Bit 11 - autonegotiation complete */
#define ISR_LINK_CHG		0x0400	/* Bit 10 - link status changed */
#define ISR_SYM_ERR		0x0200	/* Bit 9 - symbol error */
#define ISR_FALSE_CARRIER	0x0100	/* Bit 8 - false carrier */
#define ISR_FIFO_ERR		0x0080	/* Bit 7 - FIFO over/underflow */
#define ISR_MDIX_CHG		0x0040	/* Bit 6 - MDI crossover changed */
#define ISR_DOWNSHIFT		0x0020	/* Bit 5 - downshift */
#define ISR_ENERGY		0x0010	/* Bit 4 - energy detect */
#define ISR_DTE_POWER		0x0004	/* Bit 2 - DTE power detect */
#define ISR_POLARITY_CHG	0x0002	/* Bit 1 - polarity changed */
#define ISR_JABBER		0x0001	/* Bit 0 - jabber */

/* Logically extended advertisement register */
#define GM_ADVERTISE_SLCT		ADVERTISE_SLCT
#define GM_ADVERTISE_CSMA		ADVERTISE_CSMA
#define GM_ADVERTISE_10HALF		ADVERTISE_10HALF
#define GM_ADVERTISE_1000XFULL		ADVERTISE_1000XFULL
#define GM_ADVERTISE_10FULL		ADVERTISE_10FULL
#define GM_ADVERTISE_1000XHALF		ADVERTISE_1000XHALF
#define GM_ADVERTISE_100HALF		ADVERTISE_100HALF
#define GM_ADVERTISE_1000XPAUSE		ADVERTISE_1000XPAUSE
#define GM_ADVERTISE_100FULL		ADVERTISE_100FULL
#define GM_ADVERTISE_1000XPSE_ASYM	ADVERTISE_1000XPSE_ASYM
#define GM_ADVERTISE_100BASE4		ADVERTISE_100BASE4
#define GM_ADVERTISE_PAUSE_CAP		ADVERTISE_PAUSE_CAP
#define GM_ADVERTISE_PAUSE_ASYM		ADVERTISE_PAUSE_ASYM
#define GM_ADVERTISE_RESV		ADVERTISE_RESV
#define GM_ADVERTISE_RFAULT		ADVERTISE_RFAULT
#define GM_ADVERTISE_LPACK		ADVERTISE_LPACK
#define GM_ADVERTISE_NPAGE		ADVERTISE_NPAGE
#define GM_ADVERTISE_1000FULL		(ADVERTISE_1000FULL << 8)
#define GM_ADVERTISE_1000HALF		(ADVERTISE_1000HALF << 8)
#define GM_ADVERTISE_1000		(GM_ADVERTISE_1000FULL | \
					 GM_ADVERTISE_1000HALF)
#define GM_ADVERTISE_FULL		(GM_ADVERTISE_1000FULL | \
					 ADVERTISE_FULL)
#define GM_ADVERTISE_ALL		(GM_ADVERTISE_1000FULL | \
					 GM_ADVERTISE_1000HALF | \
					 ADVERTISE_ALL)

/* Logically extended link partner ability register */
#define GM_LPA_SLCT			LPA_SLCT
#define GM_LPA_10HALF			LPA_10HALF
#define GM_LPA_1000XFULL		LPA_1000XFULL
#define GM_LPA_10FULL			LPA_10FULL
#define GM_LPA_1000XHALF		LPA_1000XHALF
#define GM_LPA_100HALF			LPA_100HALF
#define GM_LPA_1000XPAUSE		LPA_1000XPAUSE
#define GM_LPA_100FULL			LPA_100FULL
#define GM_LPA_1000XPAUSE_ASYM		LPA_1000XPAUSE_ASYM
#define GM_LPA_100BASE4			LPA_100BASE4
#define GM_LPA_PAUSE_CAP		LPA_PAUSE_CAP
#define GM_LPA_PAUSE_ASYM		LPA_PAUSE_ASYM
#define GM_LPA_RESV			LPA_RESV
#define GM_LPA_RFAULT			LPA_RFAULT
#define GM_LPA_LPACK			LPA_LPACK
#define GM_LPA_NPAGE			LPA_NPAGE
#define GM_LPA_1000FULL			(LPA_1000FULL << 6)
#define GM_LPA_1000HALF			(LPA_1000HALF << 6)
#define GM_LPA_10000FULL		0x00040000
#define GM_LPA_10000HALF		0x00080000
#define GM_LPA_DUPLEX			(GM_LPA_1000FULL | GM_LPA_10000FULL \
					 | LPA_DUPLEX)
#define GM_LPA_10			(LPA_10FULL | LPA_10HALF)
#define GM_LPA_100			LPA_100
#define GM_LPA_1000			(GM_LPA_1000FULL | GM_LPA_1000HALF)
#define GM_LPA_10000			(GM_LPA_10000FULL | GM_LPA_10000HALF)

/* Retrieve GMII autonegotiation advertised abilities
 *
 * The MII advertisment register (MII_ADVERTISE) is logically extended
 * to include advertisement bits ADVERTISE_1000FULL and
 * ADVERTISE_1000HALF from MII_CTRL1000.  The result can be tested
 * against the GM_ADVERTISE_xxx constants.
 */
static inline unsigned int gmii_advertised(struct mii_if_info *gmii)
{
	unsigned int advertise;
	unsigned int ctrl1000;

	advertise = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_ADVERTISE);
	ctrl1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_CTRL1000);
	return (((ctrl1000 << 8) & GM_ADVERTISE_1000) | advertise);
}

/* Retrieve GMII autonegotiation link partner abilities
 *
 * The MII link partner ability register (MII_LPA) is logically
 * extended by adding bits LPA_1000HALF and LPA_1000FULL from
 * MII_STAT1000.  The result can be tested against the GM_LPA_xxx
 * constants.
 */
static inline unsigned int gmii_lpa(struct mii_if_info *gmii)
{
	unsigned int lpa;
	unsigned int stat1000;

	lpa = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_LPA);
	stat1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_STAT1000);
	return (((stat1000 << 6) & GM_LPA_1000) | lpa);
}

/* Calculate GMII autonegotiated link technology
 *
 * "negotiated" should be the result of gmii_advertised() logically
 * ANDed with the result of gmii_lpa().
 *
 * "tech" will be negotiated with the unused bits masked out.  For
 * example, if both ends of the link are capable of both
 * GM_LPA_1000FULL and GM_LPA_100FULL, GM_LPA_100FULL will be masked
 * out.
 */
static inline unsigned int gmii_nway_result(unsigned int negotiated)
{
	unsigned int other_bits;

	/* Mask out the speed and duplexity bits */
	other_bits = negotiated & ~(GM_LPA_10 | GM_LPA_100 | GM_LPA_1000);

	if (negotiated & GM_LPA_1000FULL)
		return (other_bits | GM_LPA_1000FULL);
	else if (negotiated & GM_LPA_1000HALF)
		return (other_bits | GM_LPA_1000HALF);
	else
		return (other_bits | mii_nway_result(negotiated));
}

/* Calculate GMII non-autonegotiated link technology
 *
 * This provides an equivalent to gmii_nway_result for the case when
 * autonegotiation is disabled.
 */
static inline unsigned int gmii_forced_result(unsigned int bmcr)
{
	unsigned int result;
	int full_duplex;

	full_duplex = bmcr & BMCR_FULLDPLX;
	if (bmcr & BMCR_SPEED1000)
		result = full_duplex ? GM_LPA_1000FULL : GM_LPA_1000HALF;
	else if (bmcr & BMCR_SPEED100)
		result = full_duplex ? GM_LPA_100FULL : GM_LPA_100HALF;
	else
		result = full_duplex ? GM_LPA_10FULL : GM_LPA_10HALF;
	return result;
}

#endif /* EFX_GMII_H */