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1/*
2
3 mii.c: MII interface library
4
5 Maintained by Jeff Garzik <jgarzik@pobox.com>
6 Copyright 2001,2002 Jeff Garzik
7
8 Various code came from myson803.c and other files by
9 Donald Becker. Copyright:
10
11 Written 1998-2002 by Donald Becker.
12
13 This software may be used and distributed according
14 to the terms of the GNU General Public License (GPL),
15 incorporated herein by reference. Drivers based on
16 or derived from this code fall under the GPL and must
17 retain the authorship, copyright and license notice.
18 This file is not a complete program and may only be
19 used when the entire operating system is licensed
20 under the GPL.
21
22 The author may be reached as becker@scyld.com, or C/O
23 Scyld Computing Corporation
24 410 Severn Ave., Suite 210
25 Annapolis MD 21403
26
27
28 */
29
30#include <linux/kernel.h>
31#include <linux/module.h>
32#include <linux/netdevice.h>
33#include <linux/ethtool.h>
34#include <linux/mii.h>
35
36static u32 mii_get_an(struct mii_if_info *mii, u16 addr)
37{
38 int advert;
39
40 advert = mii->mdio_read(mii->dev, mii->phy_id, addr);
41
42 return mii_lpa_to_ethtool_lpa_t(advert);
43}
44
45/**
46 * mii_ethtool_gset - get settings that are specified in @ecmd
47 * @mii: MII interface
48 * @ecmd: requested ethtool_cmd
49 *
50 * The @ecmd parameter is expected to have been cleared before calling
51 * mii_ethtool_gset().
52 *
53 * Returns 0 for success, negative on error.
54 */
55int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
56{
57 struct net_device *dev = mii->dev;
58 u16 bmcr, bmsr, ctrl1000 = 0, stat1000 = 0;
59 u32 nego;
60
61 ecmd->supported =
62 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
63 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
64 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
65 if (mii->supports_gmii)
66 ecmd->supported |= SUPPORTED_1000baseT_Half |
67 SUPPORTED_1000baseT_Full;
68
69 /* only supports twisted-pair */
70 ecmd->port = PORT_MII;
71
72 /* only supports internal transceiver */
73 ecmd->transceiver = XCVR_INTERNAL;
74
75 /* this isn't fully supported at higher layers */
76 ecmd->phy_address = mii->phy_id;
77 ecmd->mdio_support = ETH_MDIO_SUPPORTS_C22;
78
79 ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
80
81 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
82 bmsr = mii->mdio_read(dev, mii->phy_id, MII_BMSR);
83 if (mii->supports_gmii) {
84 ctrl1000 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
85 stat1000 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000);
86 }
87 if (bmcr & BMCR_ANENABLE) {
88 ecmd->advertising |= ADVERTISED_Autoneg;
89 ecmd->autoneg = AUTONEG_ENABLE;
90
91 ecmd->advertising |= mii_get_an(mii, MII_ADVERTISE);
92 if (mii->supports_gmii)
93 ecmd->advertising |=
94 mii_ctrl1000_to_ethtool_adv_t(ctrl1000);
95
96 if (bmsr & BMSR_ANEGCOMPLETE) {
97 ecmd->lp_advertising = mii_get_an(mii, MII_LPA);
98 ecmd->lp_advertising |=
99 mii_stat1000_to_ethtool_lpa_t(stat1000);
100 } else {
101 ecmd->lp_advertising = 0;
102 }
103
104 nego = ecmd->advertising & ecmd->lp_advertising;
105
106 if (nego & (ADVERTISED_1000baseT_Full |
107 ADVERTISED_1000baseT_Half)) {
108 ethtool_cmd_speed_set(ecmd, SPEED_1000);
109 ecmd->duplex = !!(nego & ADVERTISED_1000baseT_Full);
110 } else if (nego & (ADVERTISED_100baseT_Full |
111 ADVERTISED_100baseT_Half)) {
112 ethtool_cmd_speed_set(ecmd, SPEED_100);
113 ecmd->duplex = !!(nego & ADVERTISED_100baseT_Full);
114 } else {
115 ethtool_cmd_speed_set(ecmd, SPEED_10);
116 ecmd->duplex = !!(nego & ADVERTISED_10baseT_Full);
117 }
118 } else {
119 ecmd->autoneg = AUTONEG_DISABLE;
120
121 ethtool_cmd_speed_set(ecmd,
122 ((bmcr & BMCR_SPEED1000 &&
123 (bmcr & BMCR_SPEED100) == 0) ?
124 SPEED_1000 :
125 ((bmcr & BMCR_SPEED100) ?
126 SPEED_100 : SPEED_10)));
127 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
128 }
129
130 mii->full_duplex = ecmd->duplex;
131
132 /* ignore maxtxpkt, maxrxpkt for now */
133
134 return 0;
135}
136
137/**
138 * mii_ethtool_get_link_ksettings - get settings that are specified in @cmd
139 * @mii: MII interface
140 * @cmd: requested ethtool_link_ksettings
141 *
142 * The @cmd parameter is expected to have been cleared before calling
143 * mii_ethtool_get_link_ksettings().
144 */
145void mii_ethtool_get_link_ksettings(struct mii_if_info *mii,
146 struct ethtool_link_ksettings *cmd)
147{
148 struct net_device *dev = mii->dev;
149 u16 bmcr, bmsr, ctrl1000 = 0, stat1000 = 0;
150 u32 nego, supported, advertising, lp_advertising;
151
152 supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
153 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
154 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
155 if (mii->supports_gmii)
156 supported |= SUPPORTED_1000baseT_Half |
157 SUPPORTED_1000baseT_Full;
158
159 /* only supports twisted-pair */
160 cmd->base.port = PORT_MII;
161
162 /* this isn't fully supported at higher layers */
163 cmd->base.phy_address = mii->phy_id;
164 cmd->base.mdio_support = ETH_MDIO_SUPPORTS_C22;
165
166 advertising = ADVERTISED_TP | ADVERTISED_MII;
167
168 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
169 bmsr = mii->mdio_read(dev, mii->phy_id, MII_BMSR);
170 if (mii->supports_gmii) {
171 ctrl1000 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
172 stat1000 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000);
173 }
174 if (bmcr & BMCR_ANENABLE) {
175 advertising |= ADVERTISED_Autoneg;
176 cmd->base.autoneg = AUTONEG_ENABLE;
177
178 advertising |= mii_get_an(mii, MII_ADVERTISE);
179 if (mii->supports_gmii)
180 advertising |= mii_ctrl1000_to_ethtool_adv_t(ctrl1000);
181
182 if (bmsr & BMSR_ANEGCOMPLETE) {
183 lp_advertising = mii_get_an(mii, MII_LPA);
184 lp_advertising |=
185 mii_stat1000_to_ethtool_lpa_t(stat1000);
186 } else {
187 lp_advertising = 0;
188 }
189
190 nego = advertising & lp_advertising;
191
192 if (nego & (ADVERTISED_1000baseT_Full |
193 ADVERTISED_1000baseT_Half)) {
194 cmd->base.speed = SPEED_1000;
195 cmd->base.duplex = !!(nego & ADVERTISED_1000baseT_Full);
196 } else if (nego & (ADVERTISED_100baseT_Full |
197 ADVERTISED_100baseT_Half)) {
198 cmd->base.speed = SPEED_100;
199 cmd->base.duplex = !!(nego & ADVERTISED_100baseT_Full);
200 } else {
201 cmd->base.speed = SPEED_10;
202 cmd->base.duplex = !!(nego & ADVERTISED_10baseT_Full);
203 }
204 } else {
205 cmd->base.autoneg = AUTONEG_DISABLE;
206
207 cmd->base.speed = ((bmcr & BMCR_SPEED1000 &&
208 (bmcr & BMCR_SPEED100) == 0) ?
209 SPEED_1000 :
210 ((bmcr & BMCR_SPEED100) ?
211 SPEED_100 : SPEED_10));
212 cmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
213 DUPLEX_FULL : DUPLEX_HALF;
214
215 lp_advertising = 0;
216 }
217
218 mii->full_duplex = cmd->base.duplex;
219
220 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
221 supported);
222 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
223 advertising);
224 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
225 lp_advertising);
226
227 /* ignore maxtxpkt, maxrxpkt for now */
228}
229
230/**
231 * mii_ethtool_sset - set settings that are specified in @ecmd
232 * @mii: MII interface
233 * @ecmd: requested ethtool_cmd
234 *
235 * Returns 0 for success, negative on error.
236 */
237int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
238{
239 struct net_device *dev = mii->dev;
240 u32 speed = ethtool_cmd_speed(ecmd);
241
242 if (speed != SPEED_10 &&
243 speed != SPEED_100 &&
244 speed != SPEED_1000)
245 return -EINVAL;
246 if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
247 return -EINVAL;
248 if (ecmd->port != PORT_MII)
249 return -EINVAL;
250 if (ecmd->transceiver != XCVR_INTERNAL)
251 return -EINVAL;
252 if (ecmd->phy_address != mii->phy_id)
253 return -EINVAL;
254 if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
255 return -EINVAL;
256 if ((speed == SPEED_1000) && (!mii->supports_gmii))
257 return -EINVAL;
258
259 /* ignore supported, maxtxpkt, maxrxpkt */
260
261 if (ecmd->autoneg == AUTONEG_ENABLE) {
262 u32 bmcr, advert, tmp;
263 u32 advert2 = 0, tmp2 = 0;
264
265 if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
266 ADVERTISED_10baseT_Full |
267 ADVERTISED_100baseT_Half |
268 ADVERTISED_100baseT_Full |
269 ADVERTISED_1000baseT_Half |
270 ADVERTISED_1000baseT_Full)) == 0)
271 return -EINVAL;
272
273 /* advertise only what has been requested */
274 advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
275 tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
276 if (mii->supports_gmii) {
277 advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
278 tmp2 = advert2 & ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
279 }
280 tmp |= ethtool_adv_to_mii_adv_t(ecmd->advertising);
281
282 if (mii->supports_gmii)
283 tmp2 |=
284 ethtool_adv_to_mii_ctrl1000_t(ecmd->advertising);
285 if (advert != tmp) {
286 mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
287 mii->advertising = tmp;
288 }
289 if ((mii->supports_gmii) && (advert2 != tmp2))
290 mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
291
292 /* turn on autonegotiation, and force a renegotiate */
293 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
294 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
295 mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
296
297 mii->force_media = 0;
298 } else {
299 u32 bmcr, tmp;
300
301 /* turn off auto negotiation, set speed and duplexity */
302 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
303 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
304 BMCR_SPEED1000 | BMCR_FULLDPLX);
305 if (speed == SPEED_1000)
306 tmp |= BMCR_SPEED1000;
307 else if (speed == SPEED_100)
308 tmp |= BMCR_SPEED100;
309 if (ecmd->duplex == DUPLEX_FULL) {
310 tmp |= BMCR_FULLDPLX;
311 mii->full_duplex = 1;
312 } else
313 mii->full_duplex = 0;
314 if (bmcr != tmp)
315 mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
316
317 mii->force_media = 1;
318 }
319 return 0;
320}
321
322/**
323 * mii_ethtool_set_link_ksettings - set settings that are specified in @cmd
324 * @mii: MII interfaces
325 * @cmd: requested ethtool_link_ksettings
326 *
327 * Returns 0 for success, negative on error.
328 */
329int mii_ethtool_set_link_ksettings(struct mii_if_info *mii,
330 const struct ethtool_link_ksettings *cmd)
331{
332 struct net_device *dev = mii->dev;
333 u32 speed = cmd->base.speed;
334
335 if (speed != SPEED_10 &&
336 speed != SPEED_100 &&
337 speed != SPEED_1000)
338 return -EINVAL;
339 if (cmd->base.duplex != DUPLEX_HALF && cmd->base.duplex != DUPLEX_FULL)
340 return -EINVAL;
341 if (cmd->base.port != PORT_MII)
342 return -EINVAL;
343 if (cmd->base.phy_address != mii->phy_id)
344 return -EINVAL;
345 if (cmd->base.autoneg != AUTONEG_DISABLE &&
346 cmd->base.autoneg != AUTONEG_ENABLE)
347 return -EINVAL;
348 if ((speed == SPEED_1000) && (!mii->supports_gmii))
349 return -EINVAL;
350
351 /* ignore supported, maxtxpkt, maxrxpkt */
352
353 if (cmd->base.autoneg == AUTONEG_ENABLE) {
354 u32 bmcr, advert, tmp;
355 u32 advert2 = 0, tmp2 = 0;
356 u32 advertising;
357
358 ethtool_convert_link_mode_to_legacy_u32(
359 &advertising, cmd->link_modes.advertising);
360
361 if ((advertising & (ADVERTISED_10baseT_Half |
362 ADVERTISED_10baseT_Full |
363 ADVERTISED_100baseT_Half |
364 ADVERTISED_100baseT_Full |
365 ADVERTISED_1000baseT_Half |
366 ADVERTISED_1000baseT_Full)) == 0)
367 return -EINVAL;
368
369 /* advertise only what has been requested */
370 advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
371 tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
372 if (mii->supports_gmii) {
373 advert2 = mii->mdio_read(dev, mii->phy_id,
374 MII_CTRL1000);
375 tmp2 = advert2 &
376 ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
377 }
378 tmp |= ethtool_adv_to_mii_adv_t(advertising);
379
380 if (mii->supports_gmii)
381 tmp2 |= ethtool_adv_to_mii_ctrl1000_t(advertising);
382 if (advert != tmp) {
383 mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
384 mii->advertising = tmp;
385 }
386 if ((mii->supports_gmii) && (advert2 != tmp2))
387 mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
388
389 /* turn on autonegotiation, and force a renegotiate */
390 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
391 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
392 mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
393
394 mii->force_media = 0;
395 } else {
396 u32 bmcr, tmp;
397
398 /* turn off auto negotiation, set speed and duplexity */
399 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
400 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
401 BMCR_SPEED1000 | BMCR_FULLDPLX);
402 if (speed == SPEED_1000)
403 tmp |= BMCR_SPEED1000;
404 else if (speed == SPEED_100)
405 tmp |= BMCR_SPEED100;
406 if (cmd->base.duplex == DUPLEX_FULL) {
407 tmp |= BMCR_FULLDPLX;
408 mii->full_duplex = 1;
409 } else {
410 mii->full_duplex = 0;
411 }
412 if (bmcr != tmp)
413 mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
414
415 mii->force_media = 1;
416 }
417 return 0;
418}
419
420/**
421 * mii_check_gmii_support - check if the MII supports Gb interfaces
422 * @mii: the MII interface
423 */
424int mii_check_gmii_support(struct mii_if_info *mii)
425{
426 int reg;
427
428 reg = mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
429 if (reg & BMSR_ESTATEN) {
430 reg = mii->mdio_read(mii->dev, mii->phy_id, MII_ESTATUS);
431 if (reg & (ESTATUS_1000_TFULL | ESTATUS_1000_THALF))
432 return 1;
433 }
434
435 return 0;
436}
437
438/**
439 * mii_link_ok - is link status up/ok
440 * @mii: the MII interface
441 *
442 * Returns 1 if the MII reports link status up/ok, 0 otherwise.
443 */
444int mii_link_ok (struct mii_if_info *mii)
445{
446 /* first, a dummy read, needed to latch some MII phys */
447 mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
448 if (mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR) & BMSR_LSTATUS)
449 return 1;
450 return 0;
451}
452
453/**
454 * mii_nway_restart - restart NWay (autonegotiation) for this interface
455 * @mii: the MII interface
456 *
457 * Returns 0 on success, negative on error.
458 */
459int mii_nway_restart (struct mii_if_info *mii)
460{
461 int bmcr;
462 int r = -EINVAL;
463
464 /* if autoneg is off, it's an error */
465 bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR);
466
467 if (bmcr & BMCR_ANENABLE) {
468 bmcr |= BMCR_ANRESTART;
469 mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, bmcr);
470 r = 0;
471 }
472
473 return r;
474}
475
476/**
477 * mii_check_link - check MII link status
478 * @mii: MII interface
479 *
480 * If the link status changed (previous != current), call
481 * netif_carrier_on() if current link status is Up or call
482 * netif_carrier_off() if current link status is Down.
483 */
484void mii_check_link (struct mii_if_info *mii)
485{
486 int cur_link = mii_link_ok(mii);
487 int prev_link = netif_carrier_ok(mii->dev);
488
489 if (cur_link && !prev_link)
490 netif_carrier_on(mii->dev);
491 else if (prev_link && !cur_link)
492 netif_carrier_off(mii->dev);
493}
494
495/**
496 * mii_check_media - check the MII interface for a carrier/speed/duplex change
497 * @mii: the MII interface
498 * @ok_to_print: OK to print link up/down messages
499 * @init_media: OK to save duplex mode in @mii
500 *
501 * Returns 1 if the duplex mode changed, 0 if not.
502 * If the media type is forced, always returns 0.
503 */
504unsigned int mii_check_media (struct mii_if_info *mii,
505 unsigned int ok_to_print,
506 unsigned int init_media)
507{
508 unsigned int old_carrier, new_carrier;
509 int advertise, lpa, media, duplex;
510 int lpa2 = 0;
511
512 /* check current and old link status */
513 old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
514 new_carrier = (unsigned int) mii_link_ok(mii);
515
516 /* if carrier state did not change, this is a "bounce",
517 * just exit as everything is already set correctly
518 */
519 if ((!init_media) && (old_carrier == new_carrier))
520 return 0; /* duplex did not change */
521
522 /* no carrier, nothing much to do */
523 if (!new_carrier) {
524 netif_carrier_off(mii->dev);
525 if (ok_to_print)
526 netdev_info(mii->dev, "link down\n");
527 return 0; /* duplex did not change */
528 }
529
530 /*
531 * we have carrier, see who's on the other end
532 */
533 netif_carrier_on(mii->dev);
534
535 if (mii->force_media) {
536 if (ok_to_print)
537 netdev_info(mii->dev, "link up\n");
538 return 0; /* duplex did not change */
539 }
540
541 /* get MII advertise and LPA values */
542 if ((!init_media) && (mii->advertising))
543 advertise = mii->advertising;
544 else {
545 advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE);
546 mii->advertising = advertise;
547 }
548 lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
549 if (mii->supports_gmii)
550 lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
551
552 /* figure out media and duplex from advertise and LPA values */
553 media = mii_nway_result(lpa & advertise);
554 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
555 if (lpa2 & LPA_1000FULL)
556 duplex = 1;
557
558 if (ok_to_print)
559 netdev_info(mii->dev, "link up, %uMbps, %s-duplex, lpa 0x%04X\n",
560 lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
561 media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ?
562 100 : 10,
563 duplex ? "full" : "half",
564 lpa);
565
566 if ((init_media) || (mii->full_duplex != duplex)) {
567 mii->full_duplex = duplex;
568 return 1; /* duplex changed */
569 }
570
571 return 0; /* duplex did not change */
572}
573
574/**
575 * generic_mii_ioctl - main MII ioctl interface
576 * @mii_if: the MII interface
577 * @mii_data: MII ioctl data structure
578 * @cmd: MII ioctl command
579 * @duplex_chg_out: pointer to @duplex_changed status if there was no
580 * ioctl error
581 *
582 * Returns 0 on success, negative on error.
583 */
584int generic_mii_ioctl(struct mii_if_info *mii_if,
585 struct mii_ioctl_data *mii_data, int cmd,
586 unsigned int *duplex_chg_out)
587{
588 int rc = 0;
589 unsigned int duplex_changed = 0;
590
591 if (duplex_chg_out)
592 *duplex_chg_out = 0;
593
594 mii_data->phy_id &= mii_if->phy_id_mask;
595 mii_data->reg_num &= mii_if->reg_num_mask;
596
597 switch(cmd) {
598 case SIOCGMIIPHY:
599 mii_data->phy_id = mii_if->phy_id;
600 /* fall through */
601
602 case SIOCGMIIREG:
603 mii_data->val_out =
604 mii_if->mdio_read(mii_if->dev, mii_data->phy_id,
605 mii_data->reg_num);
606 break;
607
608 case SIOCSMIIREG: {
609 u16 val = mii_data->val_in;
610
611 if (mii_data->phy_id == mii_if->phy_id) {
612 switch(mii_data->reg_num) {
613 case MII_BMCR: {
614 unsigned int new_duplex = 0;
615 if (val & (BMCR_RESET|BMCR_ANENABLE))
616 mii_if->force_media = 0;
617 else
618 mii_if->force_media = 1;
619 if (mii_if->force_media &&
620 (val & BMCR_FULLDPLX))
621 new_duplex = 1;
622 if (mii_if->full_duplex != new_duplex) {
623 duplex_changed = 1;
624 mii_if->full_duplex = new_duplex;
625 }
626 break;
627 }
628 case MII_ADVERTISE:
629 mii_if->advertising = val;
630 break;
631 default:
632 /* do nothing */
633 break;
634 }
635 }
636
637 mii_if->mdio_write(mii_if->dev, mii_data->phy_id,
638 mii_data->reg_num, val);
639 break;
640 }
641
642 default:
643 rc = -EOPNOTSUPP;
644 break;
645 }
646
647 if ((rc == 0) && (duplex_chg_out) && (duplex_changed))
648 *duplex_chg_out = 1;
649
650 return rc;
651}
652
653MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
654MODULE_DESCRIPTION ("MII hardware support library");
655MODULE_LICENSE("GPL");
656
657EXPORT_SYMBOL(mii_link_ok);
658EXPORT_SYMBOL(mii_nway_restart);
659EXPORT_SYMBOL(mii_ethtool_gset);
660EXPORT_SYMBOL(mii_ethtool_get_link_ksettings);
661EXPORT_SYMBOL(mii_ethtool_sset);
662EXPORT_SYMBOL(mii_ethtool_set_link_ksettings);
663EXPORT_SYMBOL(mii_check_link);
664EXPORT_SYMBOL(mii_check_media);
665EXPORT_SYMBOL(mii_check_gmii_support);
666EXPORT_SYMBOL(generic_mii_ioctl);
667
1/*
2
3 mii.c: MII interface library
4
5 Maintained by Jeff Garzik <jgarzik@pobox.com>
6 Copyright 2001,2002 Jeff Garzik
7
8 Various code came from myson803.c and other files by
9 Donald Becker. Copyright:
10
11 Written 1998-2002 by Donald Becker.
12
13 This software may be used and distributed according
14 to the terms of the GNU General Public License (GPL),
15 incorporated herein by reference. Drivers based on
16 or derived from this code fall under the GPL and must
17 retain the authorship, copyright and license notice.
18 This file is not a complete program and may only be
19 used when the entire operating system is licensed
20 under the GPL.
21
22 The author may be reached as becker@scyld.com, or C/O
23 Scyld Computing Corporation
24 410 Severn Ave., Suite 210
25 Annapolis MD 21403
26
27
28 */
29
30#include <linux/kernel.h>
31#include <linux/module.h>
32#include <linux/netdevice.h>
33#include <linux/ethtool.h>
34#include <linux/mii.h>
35
36static u32 mii_get_an(struct mii_if_info *mii, u16 addr)
37{
38 int advert;
39
40 advert = mii->mdio_read(mii->dev, mii->phy_id, addr);
41
42 return mii_lpa_to_ethtool_lpa_t(advert);
43}
44
45/**
46 * mii_ethtool_gset - get settings that are specified in @ecmd
47 * @mii: MII interface
48 * @ecmd: requested ethtool_cmd
49 *
50 * The @ecmd parameter is expected to have been cleared before calling
51 * mii_ethtool_gset().
52 *
53 * Returns 0 for success, negative on error.
54 */
55int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
56{
57 struct net_device *dev = mii->dev;
58 u16 bmcr, bmsr, ctrl1000 = 0, stat1000 = 0;
59 u32 nego;
60
61 ecmd->supported =
62 (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
63 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
64 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
65 if (mii->supports_gmii)
66 ecmd->supported |= SUPPORTED_1000baseT_Half |
67 SUPPORTED_1000baseT_Full;
68
69 /* only supports twisted-pair */
70 ecmd->port = PORT_MII;
71
72 /* only supports internal transceiver */
73 ecmd->transceiver = XCVR_INTERNAL;
74
75 /* this isn't fully supported at higher layers */
76 ecmd->phy_address = mii->phy_id;
77 ecmd->mdio_support = ETH_MDIO_SUPPORTS_C22;
78
79 ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
80
81 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
82 bmsr = mii->mdio_read(dev, mii->phy_id, MII_BMSR);
83 if (mii->supports_gmii) {
84 ctrl1000 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
85 stat1000 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000);
86 }
87
88 ecmd->advertising |= mii_get_an(mii, MII_ADVERTISE);
89 if (mii->supports_gmii)
90 ecmd->advertising |=
91 mii_ctrl1000_to_ethtool_adv_t(ctrl1000);
92
93 if (bmcr & BMCR_ANENABLE) {
94 ecmd->advertising |= ADVERTISED_Autoneg;
95 ecmd->autoneg = AUTONEG_ENABLE;
96
97 if (bmsr & BMSR_ANEGCOMPLETE) {
98 ecmd->lp_advertising = mii_get_an(mii, MII_LPA);
99 ecmd->lp_advertising |=
100 mii_stat1000_to_ethtool_lpa_t(stat1000);
101 } else {
102 ecmd->lp_advertising = 0;
103 }
104
105 nego = ecmd->advertising & ecmd->lp_advertising;
106
107 if (nego & (ADVERTISED_1000baseT_Full |
108 ADVERTISED_1000baseT_Half)) {
109 ethtool_cmd_speed_set(ecmd, SPEED_1000);
110 ecmd->duplex = !!(nego & ADVERTISED_1000baseT_Full);
111 } else if (nego & (ADVERTISED_100baseT_Full |
112 ADVERTISED_100baseT_Half)) {
113 ethtool_cmd_speed_set(ecmd, SPEED_100);
114 ecmd->duplex = !!(nego & ADVERTISED_100baseT_Full);
115 } else {
116 ethtool_cmd_speed_set(ecmd, SPEED_10);
117 ecmd->duplex = !!(nego & ADVERTISED_10baseT_Full);
118 }
119 } else {
120 ecmd->autoneg = AUTONEG_DISABLE;
121
122 ethtool_cmd_speed_set(ecmd,
123 ((bmcr & BMCR_SPEED1000 &&
124 (bmcr & BMCR_SPEED100) == 0) ?
125 SPEED_1000 :
126 ((bmcr & BMCR_SPEED100) ?
127 SPEED_100 : SPEED_10)));
128 ecmd->duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
129 }
130
131 mii->full_duplex = ecmd->duplex;
132
133 /* ignore maxtxpkt, maxrxpkt for now */
134
135 return 0;
136}
137
138/**
139 * mii_ethtool_get_link_ksettings - get settings that are specified in @cmd
140 * @mii: MII interface
141 * @cmd: requested ethtool_link_ksettings
142 *
143 * The @cmd parameter is expected to have been cleared before calling
144 * mii_ethtool_get_link_ksettings().
145 */
146void mii_ethtool_get_link_ksettings(struct mii_if_info *mii,
147 struct ethtool_link_ksettings *cmd)
148{
149 struct net_device *dev = mii->dev;
150 u16 bmcr, bmsr, ctrl1000 = 0, stat1000 = 0;
151 u32 nego, supported, advertising, lp_advertising;
152
153 supported = (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
154 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
155 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
156 if (mii->supports_gmii)
157 supported |= SUPPORTED_1000baseT_Half |
158 SUPPORTED_1000baseT_Full;
159
160 /* only supports twisted-pair */
161 cmd->base.port = PORT_MII;
162
163 /* this isn't fully supported at higher layers */
164 cmd->base.phy_address = mii->phy_id;
165 cmd->base.mdio_support = ETH_MDIO_SUPPORTS_C22;
166
167 advertising = ADVERTISED_TP | ADVERTISED_MII;
168
169 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
170 bmsr = mii->mdio_read(dev, mii->phy_id, MII_BMSR);
171 if (mii->supports_gmii) {
172 ctrl1000 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
173 stat1000 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000);
174 }
175
176 advertising |= mii_get_an(mii, MII_ADVERTISE);
177 if (mii->supports_gmii)
178 advertising |= mii_ctrl1000_to_ethtool_adv_t(ctrl1000);
179
180 if (bmcr & BMCR_ANENABLE) {
181 advertising |= ADVERTISED_Autoneg;
182 cmd->base.autoneg = AUTONEG_ENABLE;
183
184 if (bmsr & BMSR_ANEGCOMPLETE) {
185 lp_advertising = mii_get_an(mii, MII_LPA);
186 lp_advertising |=
187 mii_stat1000_to_ethtool_lpa_t(stat1000);
188 } else {
189 lp_advertising = 0;
190 }
191
192 nego = advertising & lp_advertising;
193
194 if (nego & (ADVERTISED_1000baseT_Full |
195 ADVERTISED_1000baseT_Half)) {
196 cmd->base.speed = SPEED_1000;
197 cmd->base.duplex = !!(nego & ADVERTISED_1000baseT_Full);
198 } else if (nego & (ADVERTISED_100baseT_Full |
199 ADVERTISED_100baseT_Half)) {
200 cmd->base.speed = SPEED_100;
201 cmd->base.duplex = !!(nego & ADVERTISED_100baseT_Full);
202 } else {
203 cmd->base.speed = SPEED_10;
204 cmd->base.duplex = !!(nego & ADVERTISED_10baseT_Full);
205 }
206 } else {
207 cmd->base.autoneg = AUTONEG_DISABLE;
208
209 cmd->base.speed = ((bmcr & BMCR_SPEED1000 &&
210 (bmcr & BMCR_SPEED100) == 0) ?
211 SPEED_1000 :
212 ((bmcr & BMCR_SPEED100) ?
213 SPEED_100 : SPEED_10));
214 cmd->base.duplex = (bmcr & BMCR_FULLDPLX) ?
215 DUPLEX_FULL : DUPLEX_HALF;
216
217 lp_advertising = 0;
218 }
219
220 mii->full_duplex = cmd->base.duplex;
221
222 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
223 supported);
224 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
225 advertising);
226 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
227 lp_advertising);
228
229 /* ignore maxtxpkt, maxrxpkt for now */
230}
231
232/**
233 * mii_ethtool_sset - set settings that are specified in @ecmd
234 * @mii: MII interface
235 * @ecmd: requested ethtool_cmd
236 *
237 * Returns 0 for success, negative on error.
238 */
239int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
240{
241 struct net_device *dev = mii->dev;
242 u32 speed = ethtool_cmd_speed(ecmd);
243
244 if (speed != SPEED_10 &&
245 speed != SPEED_100 &&
246 speed != SPEED_1000)
247 return -EINVAL;
248 if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
249 return -EINVAL;
250 if (ecmd->port != PORT_MII)
251 return -EINVAL;
252 if (ecmd->transceiver != XCVR_INTERNAL)
253 return -EINVAL;
254 if (ecmd->phy_address != mii->phy_id)
255 return -EINVAL;
256 if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
257 return -EINVAL;
258 if ((speed == SPEED_1000) && (!mii->supports_gmii))
259 return -EINVAL;
260
261 /* ignore supported, maxtxpkt, maxrxpkt */
262
263 if (ecmd->autoneg == AUTONEG_ENABLE) {
264 u32 bmcr, advert, tmp;
265 u32 advert2 = 0, tmp2 = 0;
266
267 if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
268 ADVERTISED_10baseT_Full |
269 ADVERTISED_100baseT_Half |
270 ADVERTISED_100baseT_Full |
271 ADVERTISED_1000baseT_Half |
272 ADVERTISED_1000baseT_Full)) == 0)
273 return -EINVAL;
274
275 /* advertise only what has been requested */
276 advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
277 tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
278 if (mii->supports_gmii) {
279 advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
280 tmp2 = advert2 & ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
281 }
282 tmp |= ethtool_adv_to_mii_adv_t(ecmd->advertising);
283
284 if (mii->supports_gmii)
285 tmp2 |=
286 ethtool_adv_to_mii_ctrl1000_t(ecmd->advertising);
287 if (advert != tmp) {
288 mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
289 mii->advertising = tmp;
290 }
291 if ((mii->supports_gmii) && (advert2 != tmp2))
292 mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
293
294 /* turn on autonegotiation, and force a renegotiate */
295 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
296 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
297 mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
298
299 mii->force_media = 0;
300 } else {
301 u32 bmcr, tmp;
302
303 /* turn off auto negotiation, set speed and duplexity */
304 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
305 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
306 BMCR_SPEED1000 | BMCR_FULLDPLX);
307 if (speed == SPEED_1000)
308 tmp |= BMCR_SPEED1000;
309 else if (speed == SPEED_100)
310 tmp |= BMCR_SPEED100;
311 if (ecmd->duplex == DUPLEX_FULL) {
312 tmp |= BMCR_FULLDPLX;
313 mii->full_duplex = 1;
314 } else
315 mii->full_duplex = 0;
316 if (bmcr != tmp)
317 mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
318
319 mii->force_media = 1;
320 }
321 return 0;
322}
323
324/**
325 * mii_ethtool_set_link_ksettings - set settings that are specified in @cmd
326 * @mii: MII interfaces
327 * @cmd: requested ethtool_link_ksettings
328 *
329 * Returns 0 for success, negative on error.
330 */
331int mii_ethtool_set_link_ksettings(struct mii_if_info *mii,
332 const struct ethtool_link_ksettings *cmd)
333{
334 struct net_device *dev = mii->dev;
335 u32 speed = cmd->base.speed;
336
337 if (speed != SPEED_10 &&
338 speed != SPEED_100 &&
339 speed != SPEED_1000)
340 return -EINVAL;
341 if (cmd->base.duplex != DUPLEX_HALF && cmd->base.duplex != DUPLEX_FULL)
342 return -EINVAL;
343 if (cmd->base.port != PORT_MII)
344 return -EINVAL;
345 if (cmd->base.phy_address != mii->phy_id)
346 return -EINVAL;
347 if (cmd->base.autoneg != AUTONEG_DISABLE &&
348 cmd->base.autoneg != AUTONEG_ENABLE)
349 return -EINVAL;
350 if ((speed == SPEED_1000) && (!mii->supports_gmii))
351 return -EINVAL;
352
353 /* ignore supported, maxtxpkt, maxrxpkt */
354
355 if (cmd->base.autoneg == AUTONEG_ENABLE) {
356 u32 bmcr, advert, tmp;
357 u32 advert2 = 0, tmp2 = 0;
358 u32 advertising;
359
360 ethtool_convert_link_mode_to_legacy_u32(
361 &advertising, cmd->link_modes.advertising);
362
363 if ((advertising & (ADVERTISED_10baseT_Half |
364 ADVERTISED_10baseT_Full |
365 ADVERTISED_100baseT_Half |
366 ADVERTISED_100baseT_Full |
367 ADVERTISED_1000baseT_Half |
368 ADVERTISED_1000baseT_Full)) == 0)
369 return -EINVAL;
370
371 /* advertise only what has been requested */
372 advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
373 tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
374 if (mii->supports_gmii) {
375 advert2 = mii->mdio_read(dev, mii->phy_id,
376 MII_CTRL1000);
377 tmp2 = advert2 &
378 ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
379 }
380 tmp |= ethtool_adv_to_mii_adv_t(advertising);
381
382 if (mii->supports_gmii)
383 tmp2 |= ethtool_adv_to_mii_ctrl1000_t(advertising);
384 if (advert != tmp) {
385 mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
386 mii->advertising = tmp;
387 }
388 if ((mii->supports_gmii) && (advert2 != tmp2))
389 mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
390
391 /* turn on autonegotiation, and force a renegotiate */
392 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
393 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
394 mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
395
396 mii->force_media = 0;
397 } else {
398 u32 bmcr, tmp;
399
400 /* turn off auto negotiation, set speed and duplexity */
401 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
402 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
403 BMCR_SPEED1000 | BMCR_FULLDPLX);
404 if (speed == SPEED_1000)
405 tmp |= BMCR_SPEED1000;
406 else if (speed == SPEED_100)
407 tmp |= BMCR_SPEED100;
408 if (cmd->base.duplex == DUPLEX_FULL) {
409 tmp |= BMCR_FULLDPLX;
410 mii->full_duplex = 1;
411 } else {
412 mii->full_duplex = 0;
413 }
414 if (bmcr != tmp)
415 mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
416
417 mii->force_media = 1;
418 }
419 return 0;
420}
421
422/**
423 * mii_check_gmii_support - check if the MII supports Gb interfaces
424 * @mii: the MII interface
425 */
426int mii_check_gmii_support(struct mii_if_info *mii)
427{
428 int reg;
429
430 reg = mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
431 if (reg & BMSR_ESTATEN) {
432 reg = mii->mdio_read(mii->dev, mii->phy_id, MII_ESTATUS);
433 if (reg & (ESTATUS_1000_TFULL | ESTATUS_1000_THALF))
434 return 1;
435 }
436
437 return 0;
438}
439
440/**
441 * mii_link_ok - is link status up/ok
442 * @mii: the MII interface
443 *
444 * Returns 1 if the MII reports link status up/ok, 0 otherwise.
445 */
446int mii_link_ok (struct mii_if_info *mii)
447{
448 /* first, a dummy read, needed to latch some MII phys */
449 mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
450 if (mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR) & BMSR_LSTATUS)
451 return 1;
452 return 0;
453}
454
455/**
456 * mii_nway_restart - restart NWay (autonegotiation) for this interface
457 * @mii: the MII interface
458 *
459 * Returns 0 on success, negative on error.
460 */
461int mii_nway_restart (struct mii_if_info *mii)
462{
463 int bmcr;
464 int r = -EINVAL;
465
466 /* if autoneg is off, it's an error */
467 bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR);
468
469 if (bmcr & BMCR_ANENABLE) {
470 bmcr |= BMCR_ANRESTART;
471 mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, bmcr);
472 r = 0;
473 }
474
475 return r;
476}
477
478/**
479 * mii_check_link - check MII link status
480 * @mii: MII interface
481 *
482 * If the link status changed (previous != current), call
483 * netif_carrier_on() if current link status is Up or call
484 * netif_carrier_off() if current link status is Down.
485 */
486void mii_check_link (struct mii_if_info *mii)
487{
488 int cur_link = mii_link_ok(mii);
489 int prev_link = netif_carrier_ok(mii->dev);
490
491 if (cur_link && !prev_link)
492 netif_carrier_on(mii->dev);
493 else if (prev_link && !cur_link)
494 netif_carrier_off(mii->dev);
495}
496
497/**
498 * mii_check_media - check the MII interface for a carrier/speed/duplex change
499 * @mii: the MII interface
500 * @ok_to_print: OK to print link up/down messages
501 * @init_media: OK to save duplex mode in @mii
502 *
503 * Returns 1 if the duplex mode changed, 0 if not.
504 * If the media type is forced, always returns 0.
505 */
506unsigned int mii_check_media (struct mii_if_info *mii,
507 unsigned int ok_to_print,
508 unsigned int init_media)
509{
510 unsigned int old_carrier, new_carrier;
511 int advertise, lpa, media, duplex;
512 int lpa2 = 0;
513
514 /* check current and old link status */
515 old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
516 new_carrier = (unsigned int) mii_link_ok(mii);
517
518 /* if carrier state did not change, this is a "bounce",
519 * just exit as everything is already set correctly
520 */
521 if ((!init_media) && (old_carrier == new_carrier))
522 return 0; /* duplex did not change */
523
524 /* no carrier, nothing much to do */
525 if (!new_carrier) {
526 netif_carrier_off(mii->dev);
527 if (ok_to_print)
528 netdev_info(mii->dev, "link down\n");
529 return 0; /* duplex did not change */
530 }
531
532 /*
533 * we have carrier, see who's on the other end
534 */
535 netif_carrier_on(mii->dev);
536
537 if (mii->force_media) {
538 if (ok_to_print)
539 netdev_info(mii->dev, "link up\n");
540 return 0; /* duplex did not change */
541 }
542
543 /* get MII advertise and LPA values */
544 if ((!init_media) && (mii->advertising))
545 advertise = mii->advertising;
546 else {
547 advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE);
548 mii->advertising = advertise;
549 }
550 lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
551 if (mii->supports_gmii)
552 lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
553
554 /* figure out media and duplex from advertise and LPA values */
555 media = mii_nway_result(lpa & advertise);
556 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
557 if (lpa2 & LPA_1000FULL)
558 duplex = 1;
559
560 if (ok_to_print)
561 netdev_info(mii->dev, "link up, %uMbps, %s-duplex, lpa 0x%04X\n",
562 lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
563 media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ?
564 100 : 10,
565 duplex ? "full" : "half",
566 lpa);
567
568 if ((init_media) || (mii->full_duplex != duplex)) {
569 mii->full_duplex = duplex;
570 return 1; /* duplex changed */
571 }
572
573 return 0; /* duplex did not change */
574}
575
576/**
577 * generic_mii_ioctl - main MII ioctl interface
578 * @mii_if: the MII interface
579 * @mii_data: MII ioctl data structure
580 * @cmd: MII ioctl command
581 * @duplex_chg_out: pointer to @duplex_changed status if there was no
582 * ioctl error
583 *
584 * Returns 0 on success, negative on error.
585 */
586int generic_mii_ioctl(struct mii_if_info *mii_if,
587 struct mii_ioctl_data *mii_data, int cmd,
588 unsigned int *duplex_chg_out)
589{
590 int rc = 0;
591 unsigned int duplex_changed = 0;
592
593 if (duplex_chg_out)
594 *duplex_chg_out = 0;
595
596 mii_data->phy_id &= mii_if->phy_id_mask;
597 mii_data->reg_num &= mii_if->reg_num_mask;
598
599 switch(cmd) {
600 case SIOCGMIIPHY:
601 mii_data->phy_id = mii_if->phy_id;
602 fallthrough;
603
604 case SIOCGMIIREG:
605 mii_data->val_out =
606 mii_if->mdio_read(mii_if->dev, mii_data->phy_id,
607 mii_data->reg_num);
608 break;
609
610 case SIOCSMIIREG: {
611 u16 val = mii_data->val_in;
612
613 if (mii_data->phy_id == mii_if->phy_id) {
614 switch(mii_data->reg_num) {
615 case MII_BMCR: {
616 unsigned int new_duplex = 0;
617 if (val & (BMCR_RESET|BMCR_ANENABLE))
618 mii_if->force_media = 0;
619 else
620 mii_if->force_media = 1;
621 if (mii_if->force_media &&
622 (val & BMCR_FULLDPLX))
623 new_duplex = 1;
624 if (mii_if->full_duplex != new_duplex) {
625 duplex_changed = 1;
626 mii_if->full_duplex = new_duplex;
627 }
628 break;
629 }
630 case MII_ADVERTISE:
631 mii_if->advertising = val;
632 break;
633 default:
634 /* do nothing */
635 break;
636 }
637 }
638
639 mii_if->mdio_write(mii_if->dev, mii_data->phy_id,
640 mii_data->reg_num, val);
641 break;
642 }
643
644 default:
645 rc = -EOPNOTSUPP;
646 break;
647 }
648
649 if ((rc == 0) && (duplex_chg_out) && (duplex_changed))
650 *duplex_chg_out = 1;
651
652 return rc;
653}
654
655MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
656MODULE_DESCRIPTION ("MII hardware support library");
657MODULE_LICENSE("GPL");
658
659EXPORT_SYMBOL(mii_link_ok);
660EXPORT_SYMBOL(mii_nway_restart);
661EXPORT_SYMBOL(mii_ethtool_gset);
662EXPORT_SYMBOL(mii_ethtool_get_link_ksettings);
663EXPORT_SYMBOL(mii_ethtool_sset);
664EXPORT_SYMBOL(mii_ethtool_set_link_ksettings);
665EXPORT_SYMBOL(mii_check_link);
666EXPORT_SYMBOL(mii_check_media);
667EXPORT_SYMBOL(mii_check_gmii_support);
668EXPORT_SYMBOL(generic_mii_ioctl);
669