tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005-2006 Fen Systems Ltd.
4 * Copyright 2006 Solarflare Communications Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
9 */
10
11#ifndef EFX_GMII_H
12#define EFX_GMII_H
13
14/*
15 * GMII interface
16 */
17
18#include <linux/mii.h>
19
20/* GMII registers, excluding registers already defined as MII
21 * registers in mii.h
22 */
23#define GMII_IER 0x12 /* Interrupt enable register */
24#define GMII_ISR 0x13 /* Interrupt status register */
25
26/* Interrupt enable register */
27#define IER_ANEG_ERR 0x8000 /* Bit 15 - autonegotiation error */
28#define IER_SPEED_CHG 0x4000 /* Bit 14 - speed changed */
29#define IER_DUPLEX_CHG 0x2000 /* Bit 13 - duplex changed */
30#define IER_PAGE_RCVD 0x1000 /* Bit 12 - page received */
31#define IER_ANEG_DONE 0x0800 /* Bit 11 - autonegotiation complete */
32#define IER_LINK_CHG 0x0400 /* Bit 10 - link status changed */
33#define IER_SYM_ERR 0x0200 /* Bit 9 - symbol error */
34#define IER_FALSE_CARRIER 0x0100 /* Bit 8 - false carrier */
35#define IER_FIFO_ERR 0x0080 /* Bit 7 - FIFO over/underflow */
36#define IER_MDIX_CHG 0x0040 /* Bit 6 - MDI crossover changed */
37#define IER_DOWNSHIFT 0x0020 /* Bit 5 - downshift */
38#define IER_ENERGY 0x0010 /* Bit 4 - energy detect */
39#define IER_DTE_POWER 0x0004 /* Bit 2 - DTE power detect */
40#define IER_POLARITY_CHG 0x0002 /* Bit 1 - polarity changed */
41#define IER_JABBER 0x0001 /* Bit 0 - jabber */
42
43/* Interrupt status register */
44#define ISR_ANEG_ERR 0x8000 /* Bit 15 - autonegotiation error */
45#define ISR_SPEED_CHG 0x4000 /* Bit 14 - speed changed */
46#define ISR_DUPLEX_CHG 0x2000 /* Bit 13 - duplex changed */
47#define ISR_PAGE_RCVD 0x1000 /* Bit 12 - page received */
48#define ISR_ANEG_DONE 0x0800 /* Bit 11 - autonegotiation complete */
49#define ISR_LINK_CHG 0x0400 /* Bit 10 - link status changed */
50#define ISR_SYM_ERR 0x0200 /* Bit 9 - symbol error */
51#define ISR_FALSE_CARRIER 0x0100 /* Bit 8 - false carrier */
52#define ISR_FIFO_ERR 0x0080 /* Bit 7 - FIFO over/underflow */
53#define ISR_MDIX_CHG 0x0040 /* Bit 6 - MDI crossover changed */
54#define ISR_DOWNSHIFT 0x0020 /* Bit 5 - downshift */
55#define ISR_ENERGY 0x0010 /* Bit 4 - energy detect */
56#define ISR_DTE_POWER 0x0004 /* Bit 2 - DTE power detect */
57#define ISR_POLARITY_CHG 0x0002 /* Bit 1 - polarity changed */
58#define ISR_JABBER 0x0001 /* Bit 0 - jabber */
59
60/* Logically extended advertisement register */
61#define GM_ADVERTISE_SLCT ADVERTISE_SLCT
62#define GM_ADVERTISE_CSMA ADVERTISE_CSMA
63#define GM_ADVERTISE_10HALF ADVERTISE_10HALF
64#define GM_ADVERTISE_1000XFULL ADVERTISE_1000XFULL
65#define GM_ADVERTISE_10FULL ADVERTISE_10FULL
66#define GM_ADVERTISE_1000XHALF ADVERTISE_1000XHALF
67#define GM_ADVERTISE_100HALF ADVERTISE_100HALF
68#define GM_ADVERTISE_1000XPAUSE ADVERTISE_1000XPAUSE
69#define GM_ADVERTISE_100FULL ADVERTISE_100FULL
70#define GM_ADVERTISE_1000XPSE_ASYM ADVERTISE_1000XPSE_ASYM
71#define GM_ADVERTISE_100BASE4 ADVERTISE_100BASE4
72#define GM_ADVERTISE_PAUSE_CAP ADVERTISE_PAUSE_CAP
73#define GM_ADVERTISE_PAUSE_ASYM ADVERTISE_PAUSE_ASYM
74#define GM_ADVERTISE_RESV ADVERTISE_RESV
75#define GM_ADVERTISE_RFAULT ADVERTISE_RFAULT
76#define GM_ADVERTISE_LPACK ADVERTISE_LPACK
77#define GM_ADVERTISE_NPAGE ADVERTISE_NPAGE
78#define GM_ADVERTISE_1000FULL (ADVERTISE_1000FULL << 8)
79#define GM_ADVERTISE_1000HALF (ADVERTISE_1000HALF << 8)
80#define GM_ADVERTISE_1000 (GM_ADVERTISE_1000FULL | \
81 GM_ADVERTISE_1000HALF)
82#define GM_ADVERTISE_FULL (GM_ADVERTISE_1000FULL | \
83 ADVERTISE_FULL)
84#define GM_ADVERTISE_ALL (GM_ADVERTISE_1000FULL | \
85 GM_ADVERTISE_1000HALF | \
86 ADVERTISE_ALL)
87
88/* Logically extended link partner ability register */
89#define GM_LPA_SLCT LPA_SLCT
90#define GM_LPA_10HALF LPA_10HALF
91#define GM_LPA_1000XFULL LPA_1000XFULL
92#define GM_LPA_10FULL LPA_10FULL
93#define GM_LPA_1000XHALF LPA_1000XHALF
94#define GM_LPA_100HALF LPA_100HALF
95#define GM_LPA_1000XPAUSE LPA_1000XPAUSE
96#define GM_LPA_100FULL LPA_100FULL
97#define GM_LPA_1000XPAUSE_ASYM LPA_1000XPAUSE_ASYM
98#define GM_LPA_100BASE4 LPA_100BASE4
99#define GM_LPA_PAUSE_CAP LPA_PAUSE_CAP
100#define GM_LPA_PAUSE_ASYM LPA_PAUSE_ASYM
101#define GM_LPA_RESV LPA_RESV
102#define GM_LPA_RFAULT LPA_RFAULT
103#define GM_LPA_LPACK LPA_LPACK
104#define GM_LPA_NPAGE LPA_NPAGE
105#define GM_LPA_1000FULL (LPA_1000FULL << 6)
106#define GM_LPA_1000HALF (LPA_1000HALF << 6)
107#define GM_LPA_10000FULL 0x00040000
108#define GM_LPA_10000HALF 0x00080000
109#define GM_LPA_DUPLEX (GM_LPA_1000FULL | GM_LPA_10000FULL \
110 | LPA_DUPLEX)
111#define GM_LPA_10 (LPA_10FULL | LPA_10HALF)
112#define GM_LPA_100 LPA_100
113#define GM_LPA_1000 (GM_LPA_1000FULL | GM_LPA_1000HALF)
114#define GM_LPA_10000 (GM_LPA_10000FULL | GM_LPA_10000HALF)
115
116/* Retrieve GMII autonegotiation advertised abilities
117 *
118 * The MII advertisment register (MII_ADVERTISE) is logically extended
119 * to include advertisement bits ADVERTISE_1000FULL and
120 * ADVERTISE_1000HALF from MII_CTRL1000. The result can be tested
121 * against the GM_ADVERTISE_xxx constants.
122 */
123static inline unsigned int gmii_advertised(struct mii_if_info *gmii)
124{
125 unsigned int advertise;
126 unsigned int ctrl1000;
127
128 advertise = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_ADVERTISE);
129 ctrl1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_CTRL1000);
130 return (((ctrl1000 << 8) & GM_ADVERTISE_1000) | advertise);
131}
132
133/* Retrieve GMII autonegotiation link partner abilities
134 *
135 * The MII link partner ability register (MII_LPA) is logically
136 * extended by adding bits LPA_1000HALF and LPA_1000FULL from
137 * MII_STAT1000. The result can be tested against the GM_LPA_xxx
138 * constants.
139 */
140static inline unsigned int gmii_lpa(struct mii_if_info *gmii)
141{
142 unsigned int lpa;
143 unsigned int stat1000;
144
145 lpa = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_LPA);
146 stat1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_STAT1000);
147 return (((stat1000 << 6) & GM_LPA_1000) | lpa);
148}
149
150/* Calculate GMII autonegotiated link technology
151 *
152 * "negotiated" should be the result of gmii_advertised() logically
153 * ANDed with the result of gmii_lpa().
154 *
155 * "tech" will be negotiated with the unused bits masked out. For
156 * example, if both ends of the link are capable of both
157 * GM_LPA_1000FULL and GM_LPA_100FULL, GM_LPA_100FULL will be masked
158 * out.
159 */
160static inline unsigned int gmii_nway_result(unsigned int negotiated)
161{
162 unsigned int other_bits;
163
164 /* Mask out the speed and duplexity bits */
165 other_bits = negotiated & ~(GM_LPA_10 | GM_LPA_100 | GM_LPA_1000);
166
167 if (negotiated & GM_LPA_1000FULL)
168 return (other_bits | GM_LPA_1000FULL);
169 else if (negotiated & GM_LPA_1000HALF)
170 return (other_bits | GM_LPA_1000HALF);
171 else
172 return (other_bits | mii_nway_result(negotiated));
173}
174
175/* Calculate GMII non-autonegotiated link technology
176 *
177 * This provides an equivalent to gmii_nway_result for the case when
178 * autonegotiation is disabled.
179 */
180static inline unsigned int gmii_forced_result(unsigned int bmcr)
181{
182 unsigned int result;
183 int full_duplex;
184
185 full_duplex = bmcr & BMCR_FULLDPLX;
186 if (bmcr & BMCR_SPEED1000)
187 result = full_duplex ? GM_LPA_1000FULL : GM_LPA_1000HALF;
188 else if (bmcr & BMCR_SPEED100)
189 result = full_duplex ? GM_LPA_100FULL : GM_LPA_100HALF;
190 else
191 result = full_duplex ? GM_LPA_10FULL : GM_LPA_10HALF;
192 return result;
193}
194
195#endif /* EFX_GMII_H */