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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  * 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