xref: /openbmc/u-boot/include/linux/mii.h (revision a79854a9)
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  
8  #ifndef __LINUX_MII_H__
9  #define __LINUX_MII_H__
10  
11  /* Generic MII registers. */
12  
13  #define MII_BMCR	    0x00	/* Basic mode control register */
14  #define MII_BMSR	    0x01	/* Basic mode status register  */
15  #define MII_PHYSID1	    0x02	/* PHYS ID 1		       */
16  #define MII_PHYSID2	    0x03	/* PHYS ID 2		       */
17  #define MII_ADVERTISE	    0x04	/* Advertisement control reg   */
18  #define MII_LPA		    0x05	/* Link partner ability reg    */
19  #define MII_EXPANSION	    0x06	/* Expansion register	       */
20  #define MII_CTRL1000	    0x09	/* 1000BASE-T control	       */
21  #define MII_STAT1000	    0x0a	/* 1000BASE-T status	       */
22  #define MII_ESTATUS	    0x0f	/* Extended Status */
23  #define MII_DCOUNTER	    0x12	/* Disconnect counter	       */
24  #define MII_FCSCOUNTER	    0x13	/* False carrier counter       */
25  #define MII_NWAYTEST	    0x14	/* N-way auto-neg test reg     */
26  #define MII_RERRCOUNTER     0x15	/* Receive error counter       */
27  #define MII_SREVISION	    0x16	/* Silicon revision	       */
28  #define MII_RESV1	    0x17	/* Reserved...		       */
29  #define MII_LBRERROR	    0x18	/* Lpback, rx, bypass error    */
30  #define MII_PHYADDR	    0x19	/* PHY address		       */
31  #define MII_RESV2	    0x1a	/* Reserved...		       */
32  #define MII_TPISTATUS	    0x1b	/* TPI status for 10mbps       */
33  #define MII_NCONFIG	    0x1c	/* Network interface config    */
34  
35  /* Basic mode control register. */
36  #define BMCR_RESV		0x003f	/* Unused...		       */
37  #define BMCR_SPEED1000		0x0040	/* MSB of Speed (1000)	       */
38  #define BMCR_CTST		0x0080	/* Collision test	       */
39  #define BMCR_FULLDPLX		0x0100	/* Full duplex		       */
40  #define BMCR_ANRESTART		0x0200	/* Auto negotiation restart    */
41  #define BMCR_ISOLATE		0x0400	/* Disconnect DP83840 from MII */
42  #define BMCR_PDOWN		0x0800	/* Powerdown the DP83840       */
43  #define BMCR_ANENABLE		0x1000	/* Enable auto negotiation     */
44  #define BMCR_SPEED100		0x2000	/* Select 100Mbps	       */
45  #define BMCR_LOOPBACK		0x4000	/* TXD loopback bits	       */
46  #define BMCR_RESET		0x8000	/* Reset the DP83840	       */
47  
48  /* Basic mode status register. */
49  #define BMSR_ERCAP		0x0001	/* Ext-reg capability	       */
50  #define BMSR_JCD		0x0002	/* Jabber detected	       */
51  #define BMSR_LSTATUS		0x0004	/* Link status		       */
52  #define BMSR_ANEGCAPABLE	0x0008	/* Able to do auto-negotiation */
53  #define BMSR_RFAULT		0x0010	/* Remote fault detected       */
54  #define BMSR_ANEGCOMPLETE	0x0020	/* Auto-negotiation complete   */
55  #define BMSR_RESV		0x00c0	/* Unused...		       */
56  #define BMSR_ESTATEN		0x0100	/* Extended Status in R15 */
57  #define BMSR_100HALF2		0x0200	/* Can do 100BASE-T2 HDX */
58  #define BMSR_100FULL2		0x0400	/* Can do 100BASE-T2 FDX */
59  #define BMSR_10HALF		0x0800	/* Can do 10mbps, half-duplex  */
60  #define BMSR_10FULL		0x1000	/* Can do 10mbps, full-duplex  */
61  #define BMSR_100HALF		0x2000	/* Can do 100mbps, half-duplex */
62  #define BMSR_100FULL		0x4000	/* Can do 100mbps, full-duplex */
63  #define BMSR_100BASE4		0x8000	/* Can do 100mbps, 4k packets  */
64  
65  /* Advertisement control register. */
66  #define ADVERTISE_SLCT		0x001f	/* Selector bits	       */
67  #define ADVERTISE_CSMA		0x0001	/* Only selector supported     */
68  #define ADVERTISE_10HALF	0x0020	/* Try for 10mbps half-duplex  */
69  #define ADVERTISE_1000XFULL	0x0020	/* Try for 1000BASE-X full-duplex */
70  #define ADVERTISE_10FULL	0x0040	/* Try for 10mbps full-duplex  */
71  #define ADVERTISE_1000XHALF	0x0040	/* Try for 1000BASE-X half-duplex */
72  #define ADVERTISE_100HALF	0x0080	/* Try for 100mbps half-duplex */
73  #define ADVERTISE_1000XPAUSE	0x0080	/* Try for 1000BASE-X pause    */
74  #define ADVERTISE_100FULL	0x0100	/* Try for 100mbps full-duplex */
75  #define ADVERTISE_1000XPSE_ASYM 0x0100	/* Try for 1000BASE-X asym pause */
76  #define ADVERTISE_100BASE4	0x0200	/* Try for 100mbps 4k packets  */
77  #define ADVERTISE_PAUSE_CAP	0x0400	/* Try for pause	       */
78  #define ADVERTISE_PAUSE_ASYM	0x0800	/* Try for asymetric pause     */
79  #define ADVERTISE_RESV		0x1000	/* Unused...		       */
80  #define ADVERTISE_RFAULT	0x2000	/* Say we can detect faults    */
81  #define ADVERTISE_LPACK		0x4000	/* Ack link partners response  */
82  #define ADVERTISE_NPAGE		0x8000	/* Next page bit	       */
83  
84  #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
85  			ADVERTISE_CSMA)
86  #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
87  		       ADVERTISE_100HALF | ADVERTISE_100FULL)
88  
89  /* Link partner ability register. */
90  #define LPA_SLCT		0x001f	/* Same as advertise selector  */
91  #define LPA_10HALF		0x0020	/* Can do 10mbps half-duplex   */
92  #define LPA_1000XFULL		0x0020	/* Can do 1000BASE-X full-duplex */
93  #define LPA_10FULL		0x0040	/* Can do 10mbps full-duplex   */
94  #define LPA_1000XHALF		0x0040	/* Can do 1000BASE-X half-duplex */
95  #define LPA_100HALF		0x0080	/* Can do 100mbps half-duplex  */
96  #define LPA_1000XPAUSE		0x0080	/* Can do 1000BASE-X pause     */
97  #define LPA_100FULL		0x0100	/* Can do 100mbps full-duplex  */
98  #define LPA_1000XPAUSE_ASYM	0x0100	/* Can do 1000BASE-X pause asym*/
99  #define LPA_100BASE4		0x0200	/* Can do 100mbps 4k packets   */
100  #define LPA_PAUSE_CAP		0x0400	/* Can pause		       */
101  #define LPA_PAUSE_ASYM		0x0800	/* Can pause asymetrically     */
102  #define LPA_RESV		0x1000	/* Unused...		       */
103  #define LPA_RFAULT		0x2000	/* Link partner faulted        */
104  #define LPA_LPACK		0x4000	/* Link partner acked us       */
105  #define LPA_NPAGE		0x8000	/* Next page bit	       */
106  
107  #define LPA_DUPLEX		(LPA_10FULL | LPA_100FULL)
108  #define LPA_100			(LPA_100FULL | LPA_100HALF | LPA_100BASE4)
109  
110  /* Expansion register for auto-negotiation. */
111  #define EXPANSION_NWAY		0x0001	/* Can do N-way auto-nego      */
112  #define EXPANSION_LCWP		0x0002	/* Got new RX page code word   */
113  #define EXPANSION_ENABLENPAGE	0x0004	/* This enables npage words    */
114  #define EXPANSION_NPCAPABLE	0x0008	/* Link partner supports npage */
115  #define EXPANSION_MFAULTS	0x0010	/* Multiple faults detected    */
116  #define EXPANSION_RESV		0xffe0	/* Unused...		       */
117  
118  #define ESTATUS_1000_XFULL	0x8000	/* Can do 1000BX Full */
119  #define ESTATUS_1000_XHALF	0x4000	/* Can do 1000BX Half */
120  #define ESTATUS_1000_TFULL	0x2000	/* Can do 1000BT Full */
121  #define ESTATUS_1000_THALF	0x1000	/* Can do 1000BT Half */
122  
123  /* N-way test register. */
124  #define NWAYTEST_RESV1		0x00ff	/* Unused...		       */
125  #define NWAYTEST_LOOPBACK	0x0100	/* Enable loopback for N-way   */
126  #define NWAYTEST_RESV2		0xfe00	/* Unused...		       */
127  
128  /* 1000BASE-T Control register */
129  #define ADVERTISE_1000FULL	0x0200	/* Advertise 1000BASE-T full duplex */
130  #define ADVERTISE_1000HALF	0x0100	/* Advertise 1000BASE-T half duplex */
131  
132  /* 1000BASE-T Status register */
133  #define LPA_1000LOCALRXOK	0x2000	/* Link partner local receiver status */
134  #define LPA_1000REMRXOK		0x1000	/* Link partner remote receiver status */
135  #define LPA_1000FULL		0x0800	/* Link partner 1000BASE-T full duplex */
136  #define LPA_1000HALF		0x0400	/* Link partner 1000BASE-T half duplex */
137  
138  /* Flow control flags */
139  #define FLOW_CTRL_TX		0x01
140  #define FLOW_CTRL_RX		0x02
141  
142  /**
143   * mii_nway_result
144   * @negotiated: value of MII ANAR and'd with ANLPAR
145   *
146   * Given a set of MII abilities, check each bit and returns the
147   * currently supported media, in the priority order defined by
148   * IEEE 802.3u.  We use LPA_xxx constants but note this is not the
149   * value of LPA solely, as described above.
150   *
151   * The one exception to IEEE 802.3u is that 100baseT4 is placed
152   * between 100T-full and 100T-half.  If your phy does not support
153   * 100T4 this is fine. If your phy places 100T4 elsewhere in the
154   * priority order, you will need to roll your own function.
155   */
156  static inline unsigned int mii_nway_result (unsigned int negotiated)
157  {
158  	unsigned int ret;
159  
160  	if (negotiated & LPA_100FULL)
161  		ret = LPA_100FULL;
162  	else if (negotiated & LPA_100BASE4)
163  		ret = LPA_100BASE4;
164  	else if (negotiated & LPA_100HALF)
165  		ret = LPA_100HALF;
166  	else if (negotiated & LPA_10FULL)
167  		ret = LPA_10FULL;
168  	else
169  		ret = LPA_10HALF;
170  
171  	return ret;
172  }
173  
174  /**
175   * mii_duplex
176   * @duplex_lock: Non-zero if duplex is locked at full
177   * @negotiated: value of MII ANAR and'd with ANLPAR
178   *
179   * A small helper function for a common case.  Returns one
180   * if the media is operating or locked at full duplex, and
181   * returns zero otherwise.
182   */
183  static inline unsigned int mii_duplex (unsigned int duplex_lock,
184  				       unsigned int negotiated)
185  {
186  	if (duplex_lock)
187  		return 1;
188  	if (mii_nway_result(negotiated) & LPA_DUPLEX)
189  		return 1;
190  	return 0;
191  }
192  
193  #endif /* __LINUX_MII_H__ */
194