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 * Copied Form Linux 2.4.25 an unneeded items removed by:
8 * Timothy Legge (timlegge at etherboot dot org)
9 *
10 * 03/26/2004
11 */
12
13 FILE_LICENCE ( GPL2_ONLY );
14
15 #ifndef _MII_H_
16 #define _MII_H_
17
18 /* Generic MII registers. */
19
20 #define MII_BMCR 0x00 /* Basic mode control register */
21 #define MII_BMSR 0x01 /* Basic mode status register */
22 #define MII_PHYSID1 0x02 /* PHYS ID 1 */
23 #define MII_PHYSID2 0x03 /* PHYS ID 2 */
24 #define MII_ADVERTISE 0x04 /* Advertisement control reg */
25 #define MII_LPA 0x05 /* Link partner ability reg */
26 #define MII_EXPANSION 0x06 /* Expansion register */
27 #define MII_CTRL1000 0x09 /* 1000BASE-T control */
28 #define MII_STAT1000 0x0a /* 1000BASE-T status */
29 #define MII_ESTATUS 0x0f /* Extended Status */
30 #define MII_DCOUNTER 0x12 /* Disconnect counter */
31 #define MII_FCSCOUNTER 0x13 /* False carrier counter */
32 #define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */
33 #define MII_RERRCOUNTER 0x15 /* Receive error counter */
34 #define MII_SREVISION 0x16 /* Silicon revision */
35 #define MII_RESV1 0x17 /* Reserved... */
36 #define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */
37 #define MII_PHYADDR 0x19 /* PHY address */
38 #define MII_RESV2 0x1a /* Reserved... */
39 #define MII_TPISTATUS 0x1b /* TPI status for 10mbps */
40 #define MII_NCONFIG 0x1c /* Network interface config */
41
42 /* Basic mode control register. */
43 #define BMCR_RESV 0x003f /* Unused... */
44 #define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */
45 #define BMCR_CTST 0x0080 /* Collision test */
46 #define BMCR_FULLDPLX 0x0100 /* Full duplex */
47 #define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */
48 #define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */
49 #define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */
50 #define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */
51 #define BMCR_SPEED100 0x2000 /* Select 100Mbps */
52 #define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */
53 #define BMCR_RESET 0x8000 /* Reset the DP83840 */
54
55 /* Basic mode status register. */
56 #define BMSR_ERCAP 0x0001 /* Ext-reg capability */
57 #define BMSR_JCD 0x0002 /* Jabber detected */
58 #define BMSR_LSTATUS 0x0004 /* Link status */
59 #define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */
60 #define BMSR_RFAULT 0x0010 /* Remote fault detected */
61 #define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */
62 #define BMSR_RESV 0x00c0 /* Unused... */
63 #define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */
64 #define BMSR_100HALF2 0x0200 /* Can do 100BASE-T2 HDX */
65 #define BMSR_100FULL2 0x0400 /* Can do 100BASE-T2 FDX */
66 #define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */
67 #define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */
68 #define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */
69 #define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */
70 #define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */
71
72 /* Advertisement control register. */
73 #define ADVERTISE_SLCT 0x001f /* Selector bits */
74 #define ADVERTISE_CSMA 0x0001 /* Only selector supported */
75 #define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
76 #define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */
77 #define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
78 #define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */
79 #define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
80 #define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */
81 #define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
82 #define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */
83 #define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */
84 #define ADVERTISE_PAUSE_CAP 0x0400 /* Try for pause */
85 #define ADVERTISE_PAUSE_ASYM 0x0800 /* Try for asymetric pause */
86 #define ADVERTISE_RESV 0x1000 /* Unused... */
87 #define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */
88 #define ADVERTISE_LPACK 0x4000 /* Ack link partners response */
89 #define ADVERTISE_NPAGE 0x8000 /* Next page bit */
90
91 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
92 ADVERTISE_CSMA)
93 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
94 ADVERTISE_100HALF | ADVERTISE_100FULL)
95
96 /* Link partner ability register. */
97 #define LPA_SLCT 0x001f /* Same as advertise selector */
98 #define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */
99 #define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */
100 #define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
101 #define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */
102 #define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */
103 #define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */
104 #define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */
105 #define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/
106 #define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */
107 #define LPA_PAUSE_CAP 0x0400 /* Can pause */
108 #define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */
109 #define LPA_RESV 0x1000 /* Unused... */
110 #define LPA_RFAULT 0x2000 /* Link partner faulted */
111 #define LPA_LPACK 0x4000 /* Link partner acked us */
112 #define LPA_NPAGE 0x8000 /* Next page bit */
113
114 #define LPA_DUPLEX (LPA_10FULL | LPA_100FULL)
115 #define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
116
117 /* Expansion register for auto-negotiation. */
118 #define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */
119 #define EXPANSION_LCWP 0x0002 /* Got new RX page code word */
120 #define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */
121 #define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */
122 #define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */
123 #define EXPANSION_RESV 0xffe0 /* Unused... */
124
125 #define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */
126 #define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */
127
128 /* N-way test register. */
129 #define NWAYTEST_RESV1 0x00ff /* Unused... */
130 #define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
131 #define NWAYTEST_RESV2 0xfe00 /* Unused... */
132
133 /* 1000BASE-T Control register */
134 #define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */
135 #define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */
136
137 /* 1000BASE-T Status register */
138 #define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */
139 #define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */
140 #define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */
141 #define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */
142
143 #include <gpxe/netdevice.h>
144
145 struct mii_if_info {
146 int phy_id;
147 int advertising;
148 int phy_id_mask;
149 int reg_num_mask;
150
151 unsigned int full_duplex : 1; /* is full duplex? */
152 unsigned int force_media : 1; /* is autoneg. disabled? */
153 unsigned int supports_gmii : 1; /* are GMII registers supported? */
154
155 struct net_device *dev;
156 int (*mdio_read) (struct net_device *dev, int phy_id, int location);
157 void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
158 };
159
160
161 extern int mii_link_ok (struct mii_if_info *mii);
162 extern void mii_check_link (struct mii_if_info *mii);
163 extern unsigned int mii_check_media (struct mii_if_info *mii,
164 unsigned int ok_to_print,
165 unsigned int init_media);
166
167
168 /**
169 * mii_nway_result
170 * @negotiated: value of MII ANAR and'd with ANLPAR
171 *
172 * Given a set of MII abilities, check each bit and returns the
173 * currently supported media, in the priority order defined by
174 * IEEE 802.3u. We use LPA_xxx constants but note this is not the
175 * value of LPA solely, as described above.
176 *
177 * The one exception to IEEE 802.3u is that 100baseT4 is placed
178 * between 100T-full and 100T-half. If your phy does not support
179 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
180 * priority order, you will need to roll your own function.
181 */
mii_nway_result(unsigned int negotiated)182 static inline unsigned int mii_nway_result (unsigned int negotiated)
183 {
184 unsigned int ret;
185
186 if (negotiated & LPA_100FULL)
187 ret = LPA_100FULL;
188 else if (negotiated & LPA_100BASE4)
189 ret = LPA_100BASE4;
190 else if (negotiated & LPA_100HALF)
191 ret = LPA_100HALF;
192 else if (negotiated & LPA_10FULL)
193 ret = LPA_10FULL;
194 else
195 ret = LPA_10HALF;
196
197 return ret;
198 }
199
200 /**
201 * mii_duplex
202 * @duplex_lock: Non-zero if duplex is locked at full
203 * @negotiated: value of MII ANAR and'd with ANLPAR
204 *
205 * A small helper function for a common case. Returns one
206 * if the media is operating or locked at full duplex, and
207 * returns zero otherwise.
208 */
mii_duplex(unsigned int duplex_lock,unsigned int negotiated)209 static inline unsigned int mii_duplex (unsigned int duplex_lock,
210 unsigned int negotiated)
211 {
212 if (duplex_lock)
213 return 1;
214 if (mii_nway_result(negotiated) & LPA_DUPLEX)
215 return 1;
216 return 0;
217 }
218
219 #endif
220