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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_sset - set settings that are specified in @ecmd
139 * @mii: MII interface
140 * @ecmd: requested ethtool_cmd
141 *
142 * Returns 0 for success, negative on error.
143 */
144int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
145{
146 struct net_device *dev = mii->dev;
147 u32 speed = ethtool_cmd_speed(ecmd);
148
149 if (speed != SPEED_10 &&
150 speed != SPEED_100 &&
151 speed != SPEED_1000)
152 return -EINVAL;
153 if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
154 return -EINVAL;
155 if (ecmd->port != PORT_MII)
156 return -EINVAL;
157 if (ecmd->transceiver != XCVR_INTERNAL)
158 return -EINVAL;
159 if (ecmd->phy_address != mii->phy_id)
160 return -EINVAL;
161 if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
162 return -EINVAL;
163 if ((speed == SPEED_1000) && (!mii->supports_gmii))
164 return -EINVAL;
165
166 /* ignore supported, maxtxpkt, maxrxpkt */
167
168 if (ecmd->autoneg == AUTONEG_ENABLE) {
169 u32 bmcr, advert, tmp;
170 u32 advert2 = 0, tmp2 = 0;
171
172 if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
173 ADVERTISED_10baseT_Full |
174 ADVERTISED_100baseT_Half |
175 ADVERTISED_100baseT_Full |
176 ADVERTISED_1000baseT_Half |
177 ADVERTISED_1000baseT_Full)) == 0)
178 return -EINVAL;
179
180 /* advertise only what has been requested */
181 advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
182 tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
183 if (mii->supports_gmii) {
184 advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
185 tmp2 = advert2 & ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
186 }
187 tmp |= ethtool_adv_to_mii_adv_t(ecmd->advertising);
188
189 if (mii->supports_gmii)
190 tmp2 |=
191 ethtool_adv_to_mii_ctrl1000_t(ecmd->advertising);
192 if (advert != tmp) {
193 mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
194 mii->advertising = tmp;
195 }
196 if ((mii->supports_gmii) && (advert2 != tmp2))
197 mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
198
199 /* turn on autonegotiation, and force a renegotiate */
200 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
201 bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
202 mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
203
204 mii->force_media = 0;
205 } else {
206 u32 bmcr, tmp;
207
208 /* turn off auto negotiation, set speed and duplexity */
209 bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
210 tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
211 BMCR_SPEED1000 | BMCR_FULLDPLX);
212 if (speed == SPEED_1000)
213 tmp |= BMCR_SPEED1000;
214 else if (speed == SPEED_100)
215 tmp |= BMCR_SPEED100;
216 if (ecmd->duplex == DUPLEX_FULL) {
217 tmp |= BMCR_FULLDPLX;
218 mii->full_duplex = 1;
219 } else
220 mii->full_duplex = 0;
221 if (bmcr != tmp)
222 mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
223
224 mii->force_media = 1;
225 }
226 return 0;
227}
228
229/**
230 * mii_check_gmii_support - check if the MII supports Gb interfaces
231 * @mii: the MII interface
232 */
233int mii_check_gmii_support(struct mii_if_info *mii)
234{
235 int reg;
236
237 reg = mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
238 if (reg & BMSR_ESTATEN) {
239 reg = mii->mdio_read(mii->dev, mii->phy_id, MII_ESTATUS);
240 if (reg & (ESTATUS_1000_TFULL | ESTATUS_1000_THALF))
241 return 1;
242 }
243
244 return 0;
245}
246
247/**
248 * mii_link_ok - is link status up/ok
249 * @mii: the MII interface
250 *
251 * Returns 1 if the MII reports link status up/ok, 0 otherwise.
252 */
253int mii_link_ok (struct mii_if_info *mii)
254{
255 /* first, a dummy read, needed to latch some MII phys */
256 mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
257 if (mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR) & BMSR_LSTATUS)
258 return 1;
259 return 0;
260}
261
262/**
263 * mii_nway_restart - restart NWay (autonegotiation) for this interface
264 * @mii: the MII interface
265 *
266 * Returns 0 on success, negative on error.
267 */
268int mii_nway_restart (struct mii_if_info *mii)
269{
270 int bmcr;
271 int r = -EINVAL;
272
273 /* if autoneg is off, it's an error */
274 bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR);
275
276 if (bmcr & BMCR_ANENABLE) {
277 bmcr |= BMCR_ANRESTART;
278 mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, bmcr);
279 r = 0;
280 }
281
282 return r;
283}
284
285/**
286 * mii_check_link - check MII link status
287 * @mii: MII interface
288 *
289 * If the link status changed (previous != current), call
290 * netif_carrier_on() if current link status is Up or call
291 * netif_carrier_off() if current link status is Down.
292 */
293void mii_check_link (struct mii_if_info *mii)
294{
295 int cur_link = mii_link_ok(mii);
296 int prev_link = netif_carrier_ok(mii->dev);
297
298 if (cur_link && !prev_link)
299 netif_carrier_on(mii->dev);
300 else if (prev_link && !cur_link)
301 netif_carrier_off(mii->dev);
302}
303
304/**
305 * mii_check_media - check the MII interface for a duplex change
306 * @mii: the MII interface
307 * @ok_to_print: OK to print link up/down messages
308 * @init_media: OK to save duplex mode in @mii
309 *
310 * Returns 1 if the duplex mode changed, 0 if not.
311 * If the media type is forced, always returns 0.
312 */
313unsigned int mii_check_media (struct mii_if_info *mii,
314 unsigned int ok_to_print,
315 unsigned int init_media)
316{
317 unsigned int old_carrier, new_carrier;
318 int advertise, lpa, media, duplex;
319 int lpa2 = 0;
320
321 /* if forced media, go no further */
322 if (mii->force_media)
323 return 0; /* duplex did not change */
324
325 /* check current and old link status */
326 old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
327 new_carrier = (unsigned int) mii_link_ok(mii);
328
329 /* if carrier state did not change, this is a "bounce",
330 * just exit as everything is already set correctly
331 */
332 if ((!init_media) && (old_carrier == new_carrier))
333 return 0; /* duplex did not change */
334
335 /* no carrier, nothing much to do */
336 if (!new_carrier) {
337 netif_carrier_off(mii->dev);
338 if (ok_to_print)
339 netdev_info(mii->dev, "link down\n");
340 return 0; /* duplex did not change */
341 }
342
343 /*
344 * we have carrier, see who's on the other end
345 */
346 netif_carrier_on(mii->dev);
347
348 /* get MII advertise and LPA values */
349 if ((!init_media) && (mii->advertising))
350 advertise = mii->advertising;
351 else {
352 advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE);
353 mii->advertising = advertise;
354 }
355 lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
356 if (mii->supports_gmii)
357 lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
358
359 /* figure out media and duplex from advertise and LPA values */
360 media = mii_nway_result(lpa & advertise);
361 duplex = (media & ADVERTISE_FULL) ? 1 : 0;
362 if (lpa2 & LPA_1000FULL)
363 duplex = 1;
364
365 if (ok_to_print)
366 netdev_info(mii->dev, "link up, %uMbps, %s-duplex, lpa 0x%04X\n",
367 lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
368 media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ?
369 100 : 10,
370 duplex ? "full" : "half",
371 lpa);
372
373 if ((init_media) || (mii->full_duplex != duplex)) {
374 mii->full_duplex = duplex;
375 return 1; /* duplex changed */
376 }
377
378 return 0; /* duplex did not change */
379}
380
381/**
382 * generic_mii_ioctl - main MII ioctl interface
383 * @mii_if: the MII interface
384 * @mii_data: MII ioctl data structure
385 * @cmd: MII ioctl command
386 * @duplex_chg_out: pointer to @duplex_changed status if there was no
387 * ioctl error
388 *
389 * Returns 0 on success, negative on error.
390 */
391int generic_mii_ioctl(struct mii_if_info *mii_if,
392 struct mii_ioctl_data *mii_data, int cmd,
393 unsigned int *duplex_chg_out)
394{
395 int rc = 0;
396 unsigned int duplex_changed = 0;
397
398 if (duplex_chg_out)
399 *duplex_chg_out = 0;
400
401 mii_data->phy_id &= mii_if->phy_id_mask;
402 mii_data->reg_num &= mii_if->reg_num_mask;
403
404 switch(cmd) {
405 case SIOCGMIIPHY:
406 mii_data->phy_id = mii_if->phy_id;
407 /* fall through */
408
409 case SIOCGMIIREG:
410 mii_data->val_out =
411 mii_if->mdio_read(mii_if->dev, mii_data->phy_id,
412 mii_data->reg_num);
413 break;
414
415 case SIOCSMIIREG: {
416 u16 val = mii_data->val_in;
417
418 if (mii_data->phy_id == mii_if->phy_id) {
419 switch(mii_data->reg_num) {
420 case MII_BMCR: {
421 unsigned int new_duplex = 0;
422 if (val & (BMCR_RESET|BMCR_ANENABLE))
423 mii_if->force_media = 0;
424 else
425 mii_if->force_media = 1;
426 if (mii_if->force_media &&
427 (val & BMCR_FULLDPLX))
428 new_duplex = 1;
429 if (mii_if->full_duplex != new_duplex) {
430 duplex_changed = 1;
431 mii_if->full_duplex = new_duplex;
432 }
433 break;
434 }
435 case MII_ADVERTISE:
436 mii_if->advertising = val;
437 break;
438 default:
439 /* do nothing */
440 break;
441 }
442 }
443
444 mii_if->mdio_write(mii_if->dev, mii_data->phy_id,
445 mii_data->reg_num, val);
446 break;
447 }
448
449 default:
450 rc = -EOPNOTSUPP;
451 break;
452 }
453
454 if ((rc == 0) && (duplex_chg_out) && (duplex_changed))
455 *duplex_chg_out = 1;
456
457 return rc;
458}
459
460MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
461MODULE_DESCRIPTION ("MII hardware support library");
462MODULE_LICENSE("GPL");
463
464EXPORT_SYMBOL(mii_link_ok);
465EXPORT_SYMBOL(mii_nway_restart);
466EXPORT_SYMBOL(mii_ethtool_gset);
467EXPORT_SYMBOL(mii_ethtool_sset);
468EXPORT_SYMBOL(mii_check_link);
469EXPORT_SYMBOL(mii_check_media);
470EXPORT_SYMBOL(mii_check_gmii_support);
471EXPORT_SYMBOL(generic_mii_ioctl);
472
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