Line data Source code
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 : #include <linux/types.h>
12 :
13 : /* Generic MII registers. */
14 :
15 : #define MII_BMCR 0x00 /* Basic mode control register */
16 : #define MII_BMSR 0x01 /* Basic mode status register */
17 : #define MII_PHYSID1 0x02 /* PHYS ID 1 */
18 : #define MII_PHYSID2 0x03 /* PHYS ID 2 */
19 : #define MII_ADVERTISE 0x04 /* Advertisement control reg */
20 : #define MII_LPA 0x05 /* Link partner ability reg */
21 : #define MII_EXPANSION 0x06 /* Expansion register */
22 : #define MII_CTRL1000 0x09 /* 1000BASE-T control */
23 : #define MII_STAT1000 0x0a /* 1000BASE-T status */
24 : #define MII_ESTATUS 0x0f /* Extended Status */
25 : #define MII_DCOUNTER 0x12 /* Disconnect counter */
26 : #define MII_FCSCOUNTER 0x13 /* False carrier counter */
27 : #define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */
28 : #define MII_RERRCOUNTER 0x15 /* Receive error counter */
29 : #define MII_SREVISION 0x16 /* Silicon revision */
30 : #define MII_RESV1 0x17 /* Reserved... */
31 : #define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */
32 : #define MII_PHYADDR 0x19 /* PHY address */
33 : #define MII_RESV2 0x1a /* Reserved... */
34 : #define MII_TPISTATUS 0x1b /* TPI status for 10mbps */
35 : #define MII_NCONFIG 0x1c /* Network interface config */
36 :
37 : /* Basic mode control register. */
38 : #define BMCR_RESV 0x003f /* Unused... */
39 : #define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */
40 : #define BMCR_CTST 0x0080 /* Collision test */
41 : #define BMCR_FULLDPLX 0x0100 /* Full duplex */
42 : #define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */
43 : #define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */
44 : #define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */
45 : #define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */
46 : #define BMCR_SPEED100 0x2000 /* Select 100Mbps */
47 : #define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */
48 : #define BMCR_RESET 0x8000 /* Reset the DP83840 */
49 :
50 : /* Basic mode status register. */
51 : #define BMSR_ERCAP 0x0001 /* Ext-reg capability */
52 : #define BMSR_JCD 0x0002 /* Jabber detected */
53 : #define BMSR_LSTATUS 0x0004 /* Link status */
54 : #define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */
55 : #define BMSR_RFAULT 0x0010 /* Remote fault detected */
56 : #define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */
57 : #define BMSR_RESV 0x00c0 /* Unused... */
58 : #define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */
59 : #define BMSR_100HALF2 0x0200 /* Can do 100BASE-T2 HDX */
60 : #define BMSR_100FULL2 0x0400 /* Can do 100BASE-T2 FDX */
61 : #define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */
62 : #define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */
63 : #define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */
64 : #define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */
65 : #define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */
66 :
67 : /* Advertisement control register. */
68 : #define ADVERTISE_SLCT 0x001f /* Selector bits */
69 : #define ADVERTISE_CSMA 0x0001 /* Only selector supported */
70 : #define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
71 : #define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */
72 : #define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
73 : #define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */
74 : #define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
75 : #define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */
76 : #define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
77 : #define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */
78 : #define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */
79 : #define ADVERTISE_PAUSE_CAP 0x0400 /* Try for pause */
80 : #define ADVERTISE_PAUSE_ASYM 0x0800 /* Try for asymetric pause */
81 : #define ADVERTISE_RESV 0x1000 /* Unused... */
82 : #define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */
83 : #define ADVERTISE_LPACK 0x4000 /* Ack link partners response */
84 : #define ADVERTISE_NPAGE 0x8000 /* Next page bit */
85 :
86 : #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
87 : ADVERTISE_CSMA)
88 : #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
89 : ADVERTISE_100HALF | ADVERTISE_100FULL)
90 :
91 : /* Link partner ability register. */
92 : #define LPA_SLCT 0x001f /* Same as advertise selector */
93 : #define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */
94 : #define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */
95 : #define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
96 : #define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */
97 : #define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */
98 : #define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */
99 : #define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */
100 : #define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/
101 : #define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */
102 : #define LPA_PAUSE_CAP 0x0400 /* Can pause */
103 : #define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */
104 : #define LPA_RESV 0x1000 /* Unused... */
105 : #define LPA_RFAULT 0x2000 /* Link partner faulted */
106 : #define LPA_LPACK 0x4000 /* Link partner acked us */
107 : #define LPA_NPAGE 0x8000 /* Next page bit */
108 :
109 : #define LPA_DUPLEX (LPA_10FULL | LPA_100FULL)
110 : #define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
111 :
112 : /* Expansion register for auto-negotiation. */
113 : #define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */
114 : #define EXPANSION_LCWP 0x0002 /* Got new RX page code word */
115 : #define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */
116 : #define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */
117 : #define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */
118 : #define EXPANSION_RESV 0xffe0 /* Unused... */
119 :
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 : /* This structure is used in all SIOCxMIIxxx ioctl calls */
143 : struct mii_ioctl_data {
144 : __u16 phy_id;
145 : __u16 reg_num;
146 : __u16 val_in;
147 : __u16 val_out;
148 : };
149 1 :
150 : #ifdef __KERNEL__
151 :
152 : #include <linux/if.h>
153 :
154 : struct ethtool_cmd;
155 :
156 : struct mii_if_info {
157 : int phy_id;
158 : int advertising;
159 : int phy_id_mask;
160 : int reg_num_mask;
161 :
162 : unsigned int full_duplex : 1; /* is full duplex? */
163 : unsigned int force_media : 1; /* is autoneg. disabled? */
164 : unsigned int supports_gmii : 1; /* are GMII registers supported? */
165 :
166 : struct net_device *dev;
167 : int (*mdio_read) (struct net_device *dev, int phy_id, int location);
168 : void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
169 : };
170 :
171 : extern int mii_link_ok (struct mii_if_info *mii);
172 : extern int mii_nway_restart (struct mii_if_info *mii);
173 : extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
174 : extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
175 : extern int mii_check_gmii_support(struct mii_if_info *mii);
176 : extern void mii_check_link (struct mii_if_info *mii);
177 : extern unsigned int mii_check_media (struct mii_if_info *mii,
178 : unsigned int ok_to_print,
179 : unsigned int init_media);
180 : extern int generic_mii_ioctl(struct mii_if_info *mii_if,
181 : struct mii_ioctl_data *mii_data, int cmd,
182 : unsigned int *duplex_changed);
183 :
184 :
185 : static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
186 : {
187 10 : return (struct mii_ioctl_data *) &rq->ifr_ifru;
188 : }
189 :
190 :
191 : /**
192 : * mii_nway_result
193 : * @negotiated: value of MII ANAR and'd with ANLPAR
194 : *
195 : * Given a set of MII abilities, check each bit and returns the
196 : * currently supported media, in the priority order defined by
197 : * IEEE 802.3u. We use LPA_xxx constants but note this is not the
198 : * value of LPA solely, as described above.
199 : *
200 : * The one exception to IEEE 802.3u is that 100baseT4 is placed
201 : * between 100T-full and 100T-half. If your phy does not support
202 : * 100T4 this is fine. If your phy places 100T4 elsewhere in the
203 : * priority order, you will need to roll your own function.
204 : */
205 : static inline unsigned int mii_nway_result (unsigned int negotiated)
206 : {
207 : unsigned int ret;
208 :
209 : if (negotiated & LPA_100FULL)
210 : ret = LPA_100FULL;
211 : else if (negotiated & LPA_100BASE4)
212 : ret = LPA_100BASE4;
213 : else if (negotiated & LPA_100HALF)
214 : ret = LPA_100HALF;
215 : else if (negotiated & LPA_10FULL)
216 : ret = LPA_10FULL;
217 : else
218 : ret = LPA_10HALF;
219 :
220 : return ret;
221 : }
222 :
223 : /**
224 : * mii_duplex
225 : * @duplex_lock: Non-zero if duplex is locked at full
226 : * @negotiated: value of MII ANAR and'd with ANLPAR
227 : *
228 : * A small helper function for a common case. Returns one
229 : * if the media is operating or locked at full duplex, and
230 : * returns zero otherwise.
231 : */
232 : static inline unsigned int mii_duplex (unsigned int duplex_lock,
233 : unsigned int negotiated)
234 : {
235 : if (duplex_lock)
236 : return 1;
237 : if (mii_nway_result(negotiated) & LPA_DUPLEX)
238 : return 1;
239 : return 0;
240 : }
241 :
242 : /**
243 : * mii_advertise_flowctrl - get flow control advertisement flags
244 : * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
245 : */
246 : static inline u16 mii_advertise_flowctrl(int cap)
247 : {
248 : u16 adv = 0;
249 :
250 : if (cap & FLOW_CTRL_RX)
251 : adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
252 : if (cap & FLOW_CTRL_TX)
253 : adv ^= ADVERTISE_PAUSE_ASYM;
254 :
255 : return adv;
256 : }
257 :
258 : /**
259 : * mii_resolve_flowctrl_fdx
260 : * @lcladv: value of MII ADVERTISE register
261 : * @rmtadv: value of MII LPA register
262 : *
263 : * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
264 : */
265 : static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
266 : {
267 : u8 cap = 0;
268 :
269 : if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
270 : cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
271 : } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
272 : if (lcladv & ADVERTISE_PAUSE_CAP)
273 : cap = FLOW_CTRL_RX;
274 : else if (rmtadv & ADVERTISE_PAUSE_CAP)
275 : cap = FLOW_CTRL_TX;
276 : }
277 :
278 : return cap;
279 : }
280 :
281 : #endif /* __KERNEL__ */
282 : #endif /* __LINUX_MII_H__ */
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