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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>
Matt Carlson28011cf2011-11-16 18:36:59 -050012#include <linux/ethtool.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14/* Generic MII registers. */
Mark Einonc44f7eb2011-08-31 23:22:16 +000015#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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
37/* Basic mode control register. */
Mark Einonc44f7eb2011-08-31 23:22:16 +000038#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 */
Mark Einone8aaebc2011-08-31 23:22:17 +000043#define BMCR_ISOLATE 0x0400 /* Isolate data paths from MII */
44#define BMCR_PDOWN 0x0800 /* Enable low power state */
Mark Einonc44f7eb2011-08-31 23:22:16 +000045#define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */
46#define BMCR_SPEED100 0x2000 /* Select 100Mbps */
47#define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */
Mark Einone8aaebc2011-08-31 23:22:17 +000048#define BMCR_RESET 0x8000 /* Reset to default state */
Linus Torvalds1da177e2005-04-16 15:20:36 -070049
50/* Basic mode status register. */
Mark Einonc44f7eb2011-08-31 23:22:16 +000051#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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67/* Advertisement control register. */
Mark Einonc44f7eb2011-08-31 23:22:16 +000068#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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
Mark Einonc44f7eb2011-08-31 23:22:16 +000086#define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
87 ADVERTISE_CSMA)
88#define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
89 ADVERTISE_100HALF | ADVERTISE_100FULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91/* Link partner ability register. */
Mark Einonc44f7eb2011-08-31 23:22:16 +000092#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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
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. */
Mark Einonc44f7eb2011-08-31 23:22:16 +0000113#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... */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Mark Einonc44f7eb2011-08-31 23:22:16 +0000120#define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */
121#define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */
Andy Fleming00db8182005-07-30 19:31:23 -0400122
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123/* N-way test register. */
Mark Einonc44f7eb2011-08-31 23:22:16 +0000124#define NWAYTEST_RESV1 0x00ff /* Unused... */
125#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
126#define NWAYTEST_RESV2 0xfe00 /* Unused... */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128/* 1000BASE-T Control register */
Mark Einonc44f7eb2011-08-31 23:22:16 +0000129#define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */
130#define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */
Matt Carlson221c5632011-06-13 13:39:01 +0000131#define CTL1000_AS_MASTER 0x0800
132#define CTL1000_ENABLE_MASTER 0x1000
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
134/* 1000BASE-T Status register */
Mark Einonc44f7eb2011-08-31 23:22:16 +0000135#define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */
136#define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */
137#define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */
138#define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Steve Glendinninge18ce342008-12-16 02:00:00 -0800140/* Flow control flags */
141#define FLOW_CTRL_TX 0x01
142#define FLOW_CTRL_RX 0x02
143
David Woodhousec3ce7e22006-04-29 01:53:47 +0100144/* This structure is used in all SIOCxMIIxxx ioctl calls */
145struct mii_ioctl_data {
146 __u16 phy_id;
147 __u16 reg_num;
148 __u16 val_in;
149 __u16 val_out;
150};
151
Mark Einonc44f7eb2011-08-31 23:22:16 +0000152#ifdef __KERNEL__
David Woodhousec3ce7e22006-04-29 01:53:47 +0100153
154#include <linux/if.h>
155
156struct ethtool_cmd;
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158struct mii_if_info {
159 int phy_id;
160 int advertising;
161 int phy_id_mask;
162 int reg_num_mask;
163
164 unsigned int full_duplex : 1; /* is full duplex? */
165 unsigned int force_media : 1; /* is autoneg. disabled? */
166 unsigned int supports_gmii : 1; /* are GMII registers supported? */
167
168 struct net_device *dev;
169 int (*mdio_read) (struct net_device *dev, int phy_id, int location);
170 void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
171};
172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173extern int mii_link_ok (struct mii_if_info *mii);
174extern int mii_nway_restart (struct mii_if_info *mii);
175extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
176extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
Dale Farnsworth43ec6e92005-08-23 10:30:29 -0700177extern int mii_check_gmii_support(struct mii_if_info *mii);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178extern void mii_check_link (struct mii_if_info *mii);
179extern unsigned int mii_check_media (struct mii_if_info *mii,
180 unsigned int ok_to_print,
181 unsigned int init_media);
182extern int generic_mii_ioctl(struct mii_if_info *mii_if,
Mark Einonc44f7eb2011-08-31 23:22:16 +0000183 struct mii_ioctl_data *mii_data, int cmd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 unsigned int *duplex_changed);
185
186
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
188{
189 return (struct mii_ioctl_data *) &rq->ifr_ifru;
190}
191
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192/**
193 * mii_nway_result
194 * @negotiated: value of MII ANAR and'd with ANLPAR
195 *
196 * Given a set of MII abilities, check each bit and returns the
197 * currently supported media, in the priority order defined by
198 * IEEE 802.3u. We use LPA_xxx constants but note this is not the
199 * value of LPA solely, as described above.
200 *
201 * The one exception to IEEE 802.3u is that 100baseT4 is placed
202 * between 100T-full and 100T-half. If your phy does not support
203 * 100T4 this is fine. If your phy places 100T4 elsewhere in the
204 * priority order, you will need to roll your own function.
205 */
206static inline unsigned int mii_nway_result (unsigned int negotiated)
207{
208 unsigned int ret;
209
210 if (negotiated & LPA_100FULL)
211 ret = LPA_100FULL;
212 else if (negotiated & LPA_100BASE4)
213 ret = LPA_100BASE4;
214 else if (negotiated & LPA_100HALF)
215 ret = LPA_100HALF;
216 else if (negotiated & LPA_10FULL)
217 ret = LPA_10FULL;
218 else
219 ret = LPA_10HALF;
220
221 return ret;
222}
223
224/**
225 * mii_duplex
226 * @duplex_lock: Non-zero if duplex is locked at full
227 * @negotiated: value of MII ANAR and'd with ANLPAR
228 *
229 * A small helper function for a common case. Returns one
230 * if the media is operating or locked at full duplex, and
231 * returns zero otherwise.
232 */
233static inline unsigned int mii_duplex (unsigned int duplex_lock,
234 unsigned int negotiated)
235{
236 if (duplex_lock)
237 return 1;
238 if (mii_nway_result(negotiated) & LPA_DUPLEX)
239 return 1;
240 return 0;
241}
242
Steve Glendinningbc02ff92008-12-16 02:00:48 -0800243/**
Matt Carlson37f07022011-11-17 14:30:55 +0000244 * ethtool_adv_to_mii_adv_t
Matt Carlson28011cf2011-11-16 18:36:59 -0500245 * @ethadv: the ethtool advertisement settings
246 *
247 * A small helper function that translates ethtool advertisement
248 * settings to phy autonegotiation advertisements for the
249 * MII_ADVERTISE register.
250 */
Matt Carlson37f07022011-11-17 14:30:55 +0000251static inline u32 ethtool_adv_to_mii_adv_t(u32 ethadv)
Matt Carlson28011cf2011-11-16 18:36:59 -0500252{
253 u32 result = 0;
254
255 if (ethadv & ADVERTISED_10baseT_Half)
256 result |= ADVERTISE_10HALF;
257 if (ethadv & ADVERTISED_10baseT_Full)
258 result |= ADVERTISE_10FULL;
259 if (ethadv & ADVERTISED_100baseT_Half)
260 result |= ADVERTISE_100HALF;
261 if (ethadv & ADVERTISED_100baseT_Full)
262 result |= ADVERTISE_100FULL;
263 if (ethadv & ADVERTISED_Pause)
264 result |= ADVERTISE_PAUSE_CAP;
265 if (ethadv & ADVERTISED_Asym_Pause)
266 result |= ADVERTISE_PAUSE_ASYM;
267
268 return result;
269}
270
271/**
Matt Carlson37f07022011-11-17 14:30:55 +0000272 * mii_adv_to_ethtool_adv_t
Matt Carlson28011cf2011-11-16 18:36:59 -0500273 * @adv: value of the MII_ADVERTISE register
274 *
275 * A small helper function that translates MII_ADVERTISE bits
276 * to ethtool advertisement settings.
277 */
Matt Carlson37f07022011-11-17 14:30:55 +0000278static inline u32 mii_adv_to_ethtool_adv_t(u32 adv)
Matt Carlson28011cf2011-11-16 18:36:59 -0500279{
280 u32 result = 0;
281
282 if (adv & ADVERTISE_10HALF)
283 result |= ADVERTISED_10baseT_Half;
284 if (adv & ADVERTISE_10FULL)
285 result |= ADVERTISED_10baseT_Full;
286 if (adv & ADVERTISE_100HALF)
287 result |= ADVERTISED_100baseT_Half;
288 if (adv & ADVERTISE_100FULL)
289 result |= ADVERTISED_100baseT_Full;
290 if (adv & ADVERTISE_PAUSE_CAP)
291 result |= ADVERTISED_Pause;
292 if (adv & ADVERTISE_PAUSE_ASYM)
293 result |= ADVERTISED_Asym_Pause;
294
295 return result;
296}
297
298/**
Matt Carlson37f07022011-11-17 14:30:55 +0000299 * ethtool_adv_to_mii_ctrl1000_t
Matt Carlson28011cf2011-11-16 18:36:59 -0500300 * @ethadv: the ethtool advertisement settings
301 *
302 * A small helper function that translates ethtool advertisement
303 * settings to phy autonegotiation advertisements for the
304 * MII_CTRL1000 register when in 1000T mode.
305 */
Matt Carlson37f07022011-11-17 14:30:55 +0000306static inline u32 ethtool_adv_to_mii_ctrl1000_t(u32 ethadv)
Matt Carlson28011cf2011-11-16 18:36:59 -0500307{
308 u32 result = 0;
309
310 if (ethadv & ADVERTISED_1000baseT_Half)
311 result |= ADVERTISE_1000HALF;
312 if (ethadv & ADVERTISED_1000baseT_Full)
313 result |= ADVERTISE_1000FULL;
314
315 return result;
316}
317
318/**
Matt Carlson37f07022011-11-17 14:30:55 +0000319 * mii_ctrl1000_to_ethtool_adv_t
Matt Carlson28011cf2011-11-16 18:36:59 -0500320 * @adv: value of the MII_CTRL1000 register
321 *
322 * A small helper function that translates MII_CTRL1000
323 * bits, when in 1000Base-T mode, to ethtool
324 * advertisement settings.
325 */
Matt Carlson37f07022011-11-17 14:30:55 +0000326static inline u32 mii_ctrl1000_to_ethtool_adv_t(u32 adv)
Matt Carlson28011cf2011-11-16 18:36:59 -0500327{
328 u32 result = 0;
329
330 if (adv & ADVERTISE_1000HALF)
331 result |= ADVERTISED_1000baseT_Half;
332 if (adv & ADVERTISE_1000FULL)
333 result |= ADVERTISED_1000baseT_Full;
334
335 return result;
336}
337
Matt Carlson37f07022011-11-17 14:30:55 +0000338/**
339 * mii_lpa_to_ethtool_lpa_t
340 * @adv: value of the MII_LPA register
341 *
342 * A small helper function that translates MII_LPA
343 * bits, when in 1000Base-T mode, to ethtool
344 * LP advertisement settings.
345 */
346static inline u32 mii_lpa_to_ethtool_lpa_t(u32 lpa)
347{
348 u32 result = 0;
349
350 if (lpa & LPA_LPACK)
351 result |= ADVERTISED_Autoneg;
352
353 return result | mii_adv_to_ethtool_adv_t(lpa);
354}
Matt Carlson28011cf2011-11-16 18:36:59 -0500355
356/**
Matt Carlson37f07022011-11-17 14:30:55 +0000357 * mii_stat1000_to_ethtool_lpa_t
Matt Carlson28011cf2011-11-16 18:36:59 -0500358 * @adv: value of the MII_STAT1000 register
359 *
360 * A small helper function that translates MII_STAT1000
361 * bits, when in 1000Base-T mode, to ethtool
362 * advertisement settings.
363 */
Matt Carlson37f07022011-11-17 14:30:55 +0000364static inline u32 mii_stat1000_to_ethtool_lpa_t(u32 lpa)
Matt Carlson28011cf2011-11-16 18:36:59 -0500365{
366 u32 result = 0;
367
368 if (lpa & LPA_1000HALF)
369 result |= ADVERTISED_1000baseT_Half;
370 if (lpa & LPA_1000FULL)
371 result |= ADVERTISED_1000baseT_Full;
372
373 return result;
374}
375
376/**
Matt Carlson37f07022011-11-17 14:30:55 +0000377 * ethtool_adv_to_mii_adv_x
Matt Carlson28011cf2011-11-16 18:36:59 -0500378 * @ethadv: the ethtool advertisement settings
379 *
380 * A small helper function that translates ethtool advertisement
381 * settings to phy autonegotiation advertisements for the
382 * MII_CTRL1000 register when in 1000Base-X mode.
383 */
Matt Carlson37f07022011-11-17 14:30:55 +0000384static inline u32 ethtool_adv_to_mii_adv_x(u32 ethadv)
Matt Carlson28011cf2011-11-16 18:36:59 -0500385{
386 u32 result = 0;
387
388 if (ethadv & ADVERTISED_1000baseT_Half)
389 result |= ADVERTISE_1000XHALF;
390 if (ethadv & ADVERTISED_1000baseT_Full)
391 result |= ADVERTISE_1000XFULL;
392 if (ethadv & ADVERTISED_Pause)
393 result |= ADVERTISE_1000XPAUSE;
394 if (ethadv & ADVERTISED_Asym_Pause)
395 result |= ADVERTISE_1000XPSE_ASYM;
396
397 return result;
398}
399
400/**
Matt Carlson37f07022011-11-17 14:30:55 +0000401 * mii_adv_to_ethtool_adv_x
Matt Carlson28011cf2011-11-16 18:36:59 -0500402 * @adv: value of the MII_CTRL1000 register
403 *
404 * A small helper function that translates MII_CTRL1000
405 * bits, when in 1000Base-X mode, to ethtool
406 * advertisement settings.
407 */
Matt Carlson37f07022011-11-17 14:30:55 +0000408static inline u32 mii_adv_to_ethtool_adv_x(u32 adv)
Matt Carlson28011cf2011-11-16 18:36:59 -0500409{
410 u32 result = 0;
411
412 if (adv & ADVERTISE_1000XHALF)
413 result |= ADVERTISED_1000baseT_Half;
414 if (adv & ADVERTISE_1000XFULL)
415 result |= ADVERTISED_1000baseT_Full;
416 if (adv & ADVERTISE_1000XPAUSE)
417 result |= ADVERTISED_Pause;
418 if (adv & ADVERTISE_1000XPSE_ASYM)
419 result |= ADVERTISED_Asym_Pause;
420
421 return result;
422}
423
424/**
Matt Carlson37f07022011-11-17 14:30:55 +0000425 * mii_lpa_to_ethtool_lpa_x
426 * @adv: value of the MII_LPA register
427 *
428 * A small helper function that translates MII_LPA
429 * bits, when in 1000Base-X mode, to ethtool
430 * LP advertisement settings.
431 */
432static inline u32 mii_lpa_to_ethtool_lpa_x(u32 lpa)
433{
434 u32 result = 0;
435
436 if (lpa & LPA_LPACK)
437 result |= ADVERTISED_Autoneg;
438
439 return result | mii_adv_to_ethtool_adv_x(lpa);
440}
441
442/**
Ben Hutchingsa8c30832009-04-29 08:19:03 +0000443 * mii_advertise_flowctrl - get flow control advertisement flags
444 * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
445 */
446static inline u16 mii_advertise_flowctrl(int cap)
447{
448 u16 adv = 0;
449
450 if (cap & FLOW_CTRL_RX)
451 adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
452 if (cap & FLOW_CTRL_TX)
453 adv ^= ADVERTISE_PAUSE_ASYM;
454
455 return adv;
456}
457
458/**
Steve Glendinningbc02ff92008-12-16 02:00:48 -0800459 * mii_resolve_flowctrl_fdx
460 * @lcladv: value of MII ADVERTISE register
461 * @rmtadv: value of MII LPA register
462 *
463 * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
464 */
465static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
466{
467 u8 cap = 0;
468
Ben Hutchings44c22ee2009-04-29 08:15:05 +0000469 if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
470 cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
471 } else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
472 if (lcladv & ADVERTISE_PAUSE_CAP)
473 cap = FLOW_CTRL_RX;
474 else if (rmtadv & ADVERTISE_PAUSE_CAP)
Steve Glendinningbc02ff92008-12-16 02:00:48 -0800475 cap = FLOW_CTRL_TX;
476 }
477
478 return cap;
479}
480
David Woodhousec3ce7e22006-04-29 01:53:47 +0100481#endif /* __KERNEL__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482#endif /* __LINUX_MII_H__ */