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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
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 */
Andy Fleming00db8182005-07-30 19:31:23 -040024#define MII_ESTATUS 0x0f /* Extended Status */
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#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 */
Andy Fleming00db8182005-07-30 19:31:23 -040057#define BMSR_RESV 0x00c0 /* Unused... */
58#define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */
David S. Miller689d7942007-05-16 00:30:09 -070059#define BMSR_100HALF2 0x0200 /* Can do 100BASE-T2 HDX */
60#define BMSR_100FULL2 0x0400 /* Can do 100BASE-T2 FDX */
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#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 */
Michael Chanb6016b72005-05-26 13:03:09 -070071#define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
Michael Chanb6016b72005-05-26 13:03:09 -070073#define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -070074#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
Michael Chanb6016b72005-05-26 13:03:09 -070075#define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
Michael Chanb6016b72005-05-26 13:03:09 -070077#define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#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 */
Michael Chanb6016b72005-05-26 13:03:09 -070094#define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -070095#define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
Michael Chanb6016b72005-05-26 13:03:09 -070096#define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */
Michael Chanb6016b72005-05-26 13:03:09 -070098#define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */
Linus Torvalds1da177e2005-04-16 15:20:36 -070099#define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */
Michael Chanb6016b72005-05-26 13:03:09 -0700100#define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101#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
Andy Fleming00db8182005-07-30 19:31:23 -0400120#define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */
121#define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */
122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123/* 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
Steve Glendinninge18ce342008-12-16 02:00:00 -0800138/* Flow control flags */
139#define FLOW_CTRL_TX 0x01
140#define FLOW_CTRL_RX 0x02
141
David Woodhousec3ce7e22006-04-29 01:53:47 +0100142/* This structure is used in all SIOCxMIIxxx ioctl calls */
143struct mii_ioctl_data {
144 __u16 phy_id;
145 __u16 reg_num;
146 __u16 val_in;
147 __u16 val_out;
148};
149
150#ifdef __KERNEL__
151
152#include <linux/if.h>
153
154struct ethtool_cmd;
155
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156struct 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171extern int mii_link_ok (struct mii_if_info *mii);
172extern int mii_nway_restart (struct mii_if_info *mii);
173extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
174extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
Dale Farnsworth43ec6e92005-08-23 10:30:29 -0700175extern int mii_check_gmii_support(struct mii_if_info *mii);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176extern void mii_check_link (struct mii_if_info *mii);
177extern unsigned int mii_check_media (struct mii_if_info *mii,
178 unsigned int ok_to_print,
179 unsigned int init_media);
180extern 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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
186{
187 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 */
205static 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 */
232static 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
Steve Glendinningbc02ff92008-12-16 02:00:48 -0800242/**
243 * mii_resolve_flowctrl_fdx
244 * @lcladv: value of MII ADVERTISE register
245 * @rmtadv: value of MII LPA register
246 *
247 * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
248 */
249static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
250{
251 u8 cap = 0;
252
253 if (lcladv & ADVERTISE_PAUSE_CAP) {
254 if (lcladv & ADVERTISE_PAUSE_ASYM) {
255 if (rmtadv & LPA_PAUSE_CAP)
256 cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
257 else if (rmtadv & LPA_PAUSE_ASYM)
258 cap = FLOW_CTRL_RX;
259 } else {
260 if (rmtadv & LPA_PAUSE_CAP)
261 cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
262 }
263 } else if (lcladv & ADVERTISE_PAUSE_ASYM) {
264 if ((rmtadv & LPA_PAUSE_CAP) && (rmtadv & LPA_PAUSE_ASYM))
265 cap = FLOW_CTRL_TX;
266 }
267
268 return cap;
269}
270
David Woodhousec3ce7e22006-04-29 01:53:47 +0100271#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272#endif /* __LINUX_MII_H__ */