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[karo-tx-uboot.git] / drivers / net / phy / phy.c
1 /*
2  * Generic PHY Management code
3  *
4  * SPDX-License-Identifier:     GPL-2.0+
5  *
6  * Copyright 2011 Freescale Semiconductor, Inc.
7  * author Andy Fleming
8  *
9  * Based loosely off of Linux's PHY Lib
10  */
11
12 #include <config.h>
13 #include <common.h>
14 #include <malloc.h>
15 #include <net.h>
16 #include <command.h>
17 #include <miiphy.h>
18 #include <phy.h>
19 #include <errno.h>
20 #include <linux/err.h>
21 #include <linux/compiler.h>
22
23 /* Generic PHY support and helper functions */
24
25 /**
26  * genphy_config_advert - sanitize and advertise auto-negotation parameters
27  * @phydev: target phy_device struct
28  *
29  * Description: Writes MII_ADVERTISE with the appropriate values,
30  *   after sanitizing the values to make sure we only advertise
31  *   what is supported.  Returns < 0 on error, 0 if the PHY's advertisement
32  *   hasn't changed, and > 0 if it has changed.
33  */
34 static int genphy_config_advert(struct phy_device *phydev)
35 {
36         u32 advertise;
37         int oldadv, adv;
38         int err, changed = 0;
39
40         /* Only allow advertising what
41          * this PHY supports */
42         phydev->advertising &= phydev->supported;
43         advertise = phydev->advertising;
44
45         /* Setup standard advertisement */
46         oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
47
48         if (adv < 0)
49                 return adv;
50
51         adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
52                  ADVERTISE_PAUSE_ASYM);
53         if (advertise & ADVERTISED_10baseT_Half)
54                 adv |= ADVERTISE_10HALF;
55         if (advertise & ADVERTISED_10baseT_Full)
56                 adv |= ADVERTISE_10FULL;
57         if (advertise & ADVERTISED_100baseT_Half)
58                 adv |= ADVERTISE_100HALF;
59         if (advertise & ADVERTISED_100baseT_Full)
60                 adv |= ADVERTISE_100FULL;
61         if (advertise & ADVERTISED_Pause)
62                 adv |= ADVERTISE_PAUSE_CAP;
63         if (advertise & ADVERTISED_Asym_Pause)
64                 adv |= ADVERTISE_PAUSE_ASYM;
65         if (advertise & ADVERTISED_1000baseX_Half)
66                 adv |= ADVERTISE_1000XHALF;
67         if (advertise & ADVERTISED_1000baseX_Full)
68                 adv |= ADVERTISE_1000XFULL;
69
70         if (adv != oldadv) {
71                 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
72
73                 if (err < 0)
74                         return err;
75                 changed = 1;
76         }
77
78         /* Configure gigabit if it's supported */
79         if (phydev->supported & (SUPPORTED_1000baseT_Half |
80                                 SUPPORTED_1000baseT_Full)) {
81                 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
82
83                 if (adv < 0)
84                         return adv;
85
86                 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
87                 if (advertise & SUPPORTED_1000baseT_Half)
88                         adv |= ADVERTISE_1000HALF;
89                 if (advertise & SUPPORTED_1000baseT_Full)
90                         adv |= ADVERTISE_1000FULL;
91
92                 if (adv != oldadv) {
93                         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
94                                         adv);
95
96                         if (err < 0)
97                                 return err;
98                         changed = 1;
99                 }
100         }
101
102         return changed;
103 }
104
105
106 /**
107  * genphy_setup_forced - configures/forces speed/duplex from @phydev
108  * @phydev: target phy_device struct
109  *
110  * Description: Configures MII_BMCR to force speed/duplex
111  *   to the values in phydev. Assumes that the values are valid.
112  */
113 static int genphy_setup_forced(struct phy_device *phydev)
114 {
115         int err;
116         int ctl = 0;
117
118         phydev->pause = phydev->asym_pause = 0;
119
120         if (SPEED_1000 == phydev->speed)
121                 ctl |= BMCR_SPEED1000;
122         else if (SPEED_100 == phydev->speed)
123                 ctl |= BMCR_SPEED100;
124
125         if (DUPLEX_FULL == phydev->duplex)
126                 ctl |= BMCR_FULLDPLX;
127
128         err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
129
130         return err;
131 }
132
133
134 /**
135  * genphy_restart_aneg - Enable and Restart Autonegotiation
136  * @phydev: target phy_device struct
137  */
138 int genphy_restart_aneg(struct phy_device *phydev)
139 {
140         int ctl;
141
142         ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
143
144         if (ctl < 0)
145                 return ctl;
146
147         ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
148
149         /* Don't isolate the PHY if we're negotiating */
150         ctl &= ~(BMCR_ISOLATE);
151
152         ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
153
154         return ctl;
155 }
156
157
158 /**
159  * genphy_config_aneg - restart auto-negotiation or write BMCR
160  * @phydev: target phy_device struct
161  *
162  * Description: If auto-negotiation is enabled, we configure the
163  *   advertising, and then restart auto-negotiation.  If it is not
164  *   enabled, then we write the BMCR.
165  */
166 int genphy_config_aneg(struct phy_device *phydev)
167 {
168         int result;
169
170         if (AUTONEG_ENABLE != phydev->autoneg)
171                 return genphy_setup_forced(phydev);
172
173         result = genphy_config_advert(phydev);
174
175         if (result < 0) /* error */
176                 return result;
177
178         if (result == 0) {
179                 /* Advertisment hasn't changed, but maybe aneg was never on to
180                  * begin with?  Or maybe phy was isolated? */
181                 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
182
183                 if (ctl < 0)
184                         return ctl;
185
186                 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
187                         result = 1; /* do restart aneg */
188         }
189
190         /* Only restart aneg if we are advertising something different
191          * than we were before.  */
192         if (result > 0)
193                 result = genphy_restart_aneg(phydev);
194
195         return result;
196 }
197
198 /**
199  * genphy_update_link - update link status in @phydev
200  * @phydev: target phy_device struct
201  *
202  * Description: Update the value in phydev->link to reflect the
203  *   current link value.  In order to do this, we need to read
204  *   the status register twice, keeping the second value.
205  */
206 int genphy_update_link(struct phy_device *phydev)
207 {
208         unsigned int mii_reg;
209
210         /*
211          * Wait if the link is up, and autonegotiation is in progress
212          * (ie - we're capable and it's not done)
213          */
214         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
215
216         /*
217          * If we already saw the link up, and it hasn't gone down, then
218          * we don't need to wait for autoneg again
219          */
220         if (phydev->link && mii_reg & BMSR_LSTATUS)
221                 return 0;
222
223         if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
224                 int i = 0;
225
226                 printf("%s Waiting for PHY auto negotiation to complete",
227                         phydev->dev->name);
228                 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
229                         /*
230                          * Timeout reached ?
231                          */
232                         if (i > PHY_ANEG_TIMEOUT) {
233                                 printf(" TIMEOUT !\n");
234                                 phydev->link = 0;
235                                 return 0;
236                         }
237
238                         if (ctrlc()) {
239                                 puts("user interrupt!\n");
240                                 phydev->link = 0;
241                                 return -EINTR;
242                         }
243
244                         if ((i++ % 500) == 0)
245                                 printf(".");
246
247                         udelay(1000);   /* 1 ms */
248                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
249                 }
250                 printf(" done\n");
251                 phydev->link = 1;
252         } else {
253                 /* Read the link a second time to clear the latched state */
254                 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
255
256                 if (mii_reg & BMSR_LSTATUS)
257                         phydev->link = 1;
258                 else
259                         phydev->link = 0;
260         }
261
262         return 0;
263 }
264
265 /*
266  * Generic function which updates the speed and duplex.  If
267  * autonegotiation is enabled, it uses the AND of the link
268  * partner's advertised capabilities and our advertised
269  * capabilities.  If autonegotiation is disabled, we use the
270  * appropriate bits in the control register.
271  *
272  * Stolen from Linux's mii.c and phy_device.c
273  */
274 int genphy_parse_link(struct phy_device *phydev)
275 {
276         int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
277
278         /* We're using autonegotiation */
279         if (phydev->supported & SUPPORTED_Autoneg) {
280                 u32 lpa = 0;
281                 int gblpa = 0;
282                 u32 estatus = 0;
283
284                 /* Check for gigabit capability */
285                 if (phydev->supported & (SUPPORTED_1000baseT_Full |
286                                         SUPPORTED_1000baseT_Half)) {
287                         /* We want a list of states supported by
288                          * both PHYs in the link
289                          */
290                         gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
291                         if (gblpa < 0) {
292                                 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
293                                 gblpa = 0;
294                         }
295                         gblpa &= phy_read(phydev,
296                                         MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
297                 }
298
299                 /* Set the baseline so we only have to set them
300                  * if they're different
301                  */
302                 phydev->speed = SPEED_10;
303                 phydev->duplex = DUPLEX_HALF;
304
305                 /* Check the gigabit fields */
306                 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
307                         phydev->speed = SPEED_1000;
308
309                         if (gblpa & PHY_1000BTSR_1000FD)
310                                 phydev->duplex = DUPLEX_FULL;
311
312                         /* We're done! */
313                         return 0;
314                 }
315
316                 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
317                 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
318
319                 if (lpa & (LPA_100FULL | LPA_100HALF)) {
320                         phydev->speed = SPEED_100;
321
322                         if (lpa & LPA_100FULL)
323                                 phydev->duplex = DUPLEX_FULL;
324
325                 } else if (lpa & LPA_10FULL)
326                         phydev->duplex = DUPLEX_FULL;
327
328                 /*
329                  * Extended status may indicate that the PHY supports
330                  * 1000BASE-T/X even though the 1000BASE-T registers
331                  * are missing. In this case we can't tell whether the
332                  * peer also supports it, so we only check extended
333                  * status if the 1000BASE-T registers are actually
334                  * missing.
335                  */
336                 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
337                         estatus = phy_read(phydev, MDIO_DEVAD_NONE,
338                                            MII_ESTATUS);
339
340                 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
341                                 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
342                         phydev->speed = SPEED_1000;
343                         if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
344                                 phydev->duplex = DUPLEX_FULL;
345                 }
346
347         } else {
348                 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
349
350                 phydev->speed = SPEED_10;
351                 phydev->duplex = DUPLEX_HALF;
352
353                 if (bmcr & BMCR_FULLDPLX)
354                         phydev->duplex = DUPLEX_FULL;
355
356                 if (bmcr & BMCR_SPEED1000)
357                         phydev->speed = SPEED_1000;
358                 else if (bmcr & BMCR_SPEED100)
359                         phydev->speed = SPEED_100;
360         }
361
362         return 0;
363 }
364
365 int genphy_config(struct phy_device *phydev)
366 {
367         int val;
368         u32 features;
369
370         /* For now, I'll claim that the generic driver supports
371          * all possible port types */
372         features = (SUPPORTED_TP | SUPPORTED_MII
373                         | SUPPORTED_AUI | SUPPORTED_FIBRE |
374                         SUPPORTED_BNC);
375
376         /* Do we support autonegotiation? */
377         val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
378
379         if (val < 0)
380                 return val;
381
382         if (val & BMSR_ANEGCAPABLE)
383                 features |= SUPPORTED_Autoneg;
384
385         if (val & BMSR_100FULL)
386                 features |= SUPPORTED_100baseT_Full;
387         if (val & BMSR_100HALF)
388                 features |= SUPPORTED_100baseT_Half;
389         if (val & BMSR_10FULL)
390                 features |= SUPPORTED_10baseT_Full;
391         if (val & BMSR_10HALF)
392                 features |= SUPPORTED_10baseT_Half;
393
394         if (val & BMSR_ESTATEN) {
395                 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
396
397                 if (val < 0)
398                         return val;
399
400                 if (val & ESTATUS_1000_TFULL)
401                         features |= SUPPORTED_1000baseT_Full;
402                 if (val & ESTATUS_1000_THALF)
403                         features |= SUPPORTED_1000baseT_Half;
404                 if (val & ESTATUS_1000_XFULL)
405                         features |= SUPPORTED_1000baseX_Full;
406                 if (val & ESTATUS_1000_XHALF)
407                         features |= SUPPORTED_1000baseX_Half;
408         }
409
410         phydev->supported = features;
411         phydev->advertising = features;
412
413         genphy_config_aneg(phydev);
414
415         return 0;
416 }
417
418 int genphy_startup(struct phy_device *phydev)
419 {
420         genphy_update_link(phydev);
421         genphy_parse_link(phydev);
422
423         return 0;
424 }
425
426 int genphy_shutdown(struct phy_device *phydev)
427 {
428         return 0;
429 }
430
431 static struct phy_driver genphy_driver = {
432         .uid            = 0xffffffff,
433         .mask           = 0xffffffff,
434         .name           = "Generic PHY",
435         .features       = 0,
436         .config         = genphy_config,
437         .startup        = genphy_startup,
438         .shutdown       = genphy_shutdown,
439 };
440
441 static LIST_HEAD(phy_drivers);
442
443 int phy_init(void)
444 {
445 #ifdef CONFIG_PHY_AQUANTIA
446         phy_aquantia_init();
447 #endif
448 #ifdef CONFIG_PHY_ATHEROS
449         phy_atheros_init();
450 #endif
451 #ifdef CONFIG_PHY_BROADCOM
452         phy_broadcom_init();
453 #endif
454 #ifdef CONFIG_PHY_CORTINA
455         phy_cortina_init();
456 #endif
457 #ifdef CONFIG_PHY_DAVICOM
458         phy_davicom_init();
459 #endif
460 #ifdef CONFIG_PHY_ET1011C
461         phy_et1011c_init();
462 #endif
463 #ifdef CONFIG_PHY_LXT
464         phy_lxt_init();
465 #endif
466 #ifdef CONFIG_PHY_MARVELL
467         phy_marvell_init();
468 #endif
469 #ifdef CONFIG_PHY_MICREL
470         phy_micrel_init();
471 #endif
472 #ifdef CONFIG_PHY_NATSEMI
473         phy_natsemi_init();
474 #endif
475 #ifdef CONFIG_PHY_REALTEK
476         phy_realtek_init();
477 #endif
478 #ifdef CONFIG_PHY_SMSC
479         phy_smsc_init();
480 #endif
481 #ifdef CONFIG_PHY_TERANETICS
482         phy_teranetics_init();
483 #endif
484 #ifdef CONFIG_PHY_VITESSE
485         phy_vitesse_init();
486 #endif
487
488         return 0;
489 }
490
491 int phy_register(struct phy_driver *drv)
492 {
493         INIT_LIST_HEAD(&drv->list);
494         list_add_tail(&drv->list, &phy_drivers);
495
496         return 0;
497 }
498
499 static int phy_probe(struct phy_device *phydev)
500 {
501         int err = 0;
502
503         phydev->advertising = phydev->supported = phydev->drv->features;
504         phydev->mmds = phydev->drv->mmds;
505
506         if (phydev->drv->probe)
507                 err = phydev->drv->probe(phydev);
508
509         return err;
510 }
511
512 static struct phy_driver *generic_for_interface(phy_interface_t interface)
513 {
514 #ifdef CONFIG_PHYLIB_10G
515         if (is_10g_interface(interface))
516                 return &gen10g_driver;
517 #endif
518
519         return &genphy_driver;
520 }
521
522 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
523                                 phy_interface_t interface)
524 {
525         struct list_head *entry;
526         int phy_id = phydev->phy_id;
527         struct phy_driver *drv = NULL;
528
529         list_for_each(entry, &phy_drivers) {
530                 drv = list_entry(entry, struct phy_driver, list);
531                 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
532                         return drv;
533         }
534
535         /* If we made it here, there's no driver for this PHY */
536         return generic_for_interface(interface);
537 }
538
539 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
540                                             int phy_id,
541                                             phy_interface_t interface)
542 {
543         struct phy_device *dev;
544
545         /* We allocate the device, and initialize the
546          * default values */
547         dev = malloc(sizeof(*dev));
548         if (!dev) {
549                 printf("Failed to allocate PHY device for %s:%d\n",
550                         bus->name, addr);
551                 return NULL;
552         }
553
554         memset(dev, 0, sizeof(*dev));
555
556         dev->duplex = -1;
557         dev->link = 1;
558         dev->interface = interface;
559
560         dev->autoneg = AUTONEG_ENABLE;
561
562         dev->addr = addr;
563         dev->phy_id = phy_id;
564         dev->bus = bus;
565
566         dev->drv = get_phy_driver(dev, interface);
567
568         phy_probe(dev);
569
570         bus->phymap[addr] = dev;
571
572         return dev;
573 }
574
575 /**
576  * get_phy_id - reads the specified addr for its ID.
577  * @bus: the target MII bus
578  * @addr: PHY address on the MII bus
579  * @phy_id: where to store the ID retrieved.
580  *
581  * Description: Reads the ID registers of the PHY at @addr on the
582  *   @bus, stores it in @phy_id and returns zero on success.
583  */
584 static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
585 {
586         int phy_reg;
587
588         /* Grab the bits from PHYIR1, and put them
589          * in the upper half */
590         phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
591
592         if (phy_reg < 0)
593                 return -EIO;
594
595         *phy_id = (phy_reg & 0xffff) << 16;
596
597         /* Grab the bits from PHYIR2, and put them in the lower half */
598         phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
599
600         if (phy_reg < 0)
601                 return -EIO;
602
603         *phy_id |= (phy_reg & 0xffff);
604
605         return 0;
606 }
607
608 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
609                 unsigned phy_mask, int devad, phy_interface_t interface)
610 {
611         u32 phy_id = 0xffffffff;
612         while (phy_mask) {
613                 int addr = ffs(phy_mask) - 1;
614                 int r = get_phy_id(bus, addr, devad, &phy_id);
615                 /* If the PHY ID is mostly f's, we didn't find anything */
616                 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
617                         return phy_device_create(bus, addr, phy_id, interface);
618                 phy_mask &= ~(1 << addr);
619         }
620         return NULL;
621 }
622
623 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
624                 unsigned phy_mask, phy_interface_t interface)
625 {
626         /* If we have one, return the existing device, with new interface */
627         while (phy_mask) {
628                 int addr = ffs(phy_mask) - 1;
629                 if (bus->phymap[addr]) {
630                         bus->phymap[addr]->interface = interface;
631                         return bus->phymap[addr];
632                 }
633                 phy_mask &= ~(1 << addr);
634         }
635         return NULL;
636 }
637
638 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
639                 unsigned phy_mask, phy_interface_t interface)
640 {
641         int i;
642         struct phy_device *phydev;
643
644         phydev = search_for_existing_phy(bus, phy_mask, interface);
645         if (phydev)
646                 return phydev;
647         /* Try Standard (ie Clause 22) access */
648         /* Otherwise we have to try Clause 45 */
649         for (i = 0; i < 5; i++) {
650                 phydev = create_phy_by_mask(bus, phy_mask,
651                                 i ? i : MDIO_DEVAD_NONE, interface);
652                 if (IS_ERR(phydev))
653                         return NULL;
654                 if (phydev)
655                         return phydev;
656         }
657         printf("Phy %d not found\n", ffs(phy_mask) - 1);
658         return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
659 }
660
661 /**
662  * get_phy_device - reads the specified PHY device and returns its @phy_device struct
663  * @bus: the target MII bus
664  * @addr: PHY address on the MII bus
665  *
666  * Description: Reads the ID registers of the PHY at @addr on the
667  *   @bus, then allocates and returns the phy_device to represent it.
668  */
669 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
670                                          phy_interface_t interface)
671 {
672         return get_phy_device_by_mask(bus, 1 << addr, interface);
673 }
674
675 int phy_reset(struct phy_device *phydev)
676 {
677         int reg;
678         int timeout = 500;
679         int devad = MDIO_DEVAD_NONE;
680
681 #ifdef CONFIG_PHYLIB_10G
682         /* If it's 10G, we need to issue reset through one of the MMDs */
683         if (is_10g_interface(phydev->interface)) {
684                 if (!phydev->mmds)
685                         gen10g_discover_mmds(phydev);
686
687                 devad = ffs(phydev->mmds) - 1;
688         }
689 #endif
690
691         reg = phy_read(phydev, devad, MII_BMCR);
692         if (reg < 0) {
693                 debug("PHY status read failed\n");
694                 return -1;
695         }
696
697         reg |= BMCR_RESET;
698
699         if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
700                 debug("PHY reset failed\n");
701                 return -1;
702         }
703
704 #ifdef CONFIG_PHY_RESET_DELAY
705         udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
706 #endif
707         /*
708          * Poll the control register for the reset bit to go to 0 (it is
709          * auto-clearing).  This should happen within 0.5 seconds per the
710          * IEEE spec.
711          */
712         while ((reg & BMCR_RESET) && timeout--) {
713                 reg = phy_read(phydev, devad, MII_BMCR);
714
715                 if (reg < 0) {
716                         debug("PHY status read failed\n");
717                         return -1;
718                 }
719                 udelay(1000);
720         }
721
722         if (reg & BMCR_RESET) {
723                 puts("PHY reset timed out\n");
724                 return -1;
725         }
726
727         return 0;
728 }
729
730 int miiphy_reset(const char *devname, unsigned char addr)
731 {
732         struct mii_dev *bus = miiphy_get_dev_by_name(devname);
733         struct phy_device *phydev;
734
735         /*
736          * miiphy_reset was only used on standard PHYs, so we'll fake it here.
737          * If later code tries to connect with the right interface, this will
738          * be corrected by get_phy_device in phy_connect()
739          */
740         phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
741
742         return phy_reset(phydev);
743 }
744
745 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
746                 phy_interface_t interface)
747 {
748         /* Reset the bus */
749         if (bus->reset)
750                 bus->reset(bus);
751
752         /* Wait 15ms to make sure the PHY has come out of hard reset */
753         udelay(15000);
754         return get_phy_device_by_mask(bus, phy_mask, interface);
755 }
756
757 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
758 {
759         /* Soft Reset the PHY */
760         phy_reset(phydev);
761         if (phydev->dev) {
762                 printf("%s:%d is connected to %s.  Reconnecting to %s\n",
763                                 phydev->bus->name, phydev->addr,
764                                 phydev->dev->name, dev->name);
765         }
766         phydev->dev = dev;
767         debug("%s connected to %s\n", dev->name, phydev->drv->name);
768 }
769
770 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
771                 struct eth_device *dev, phy_interface_t interface)
772 {
773         struct phy_device *phydev;
774
775         phydev = phy_find_by_mask(bus, 1 << addr, interface);
776         if (phydev)
777                 phy_connect_dev(phydev, dev);
778         else
779                 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
780         return phydev;
781 }
782
783 /*
784  * Start the PHY.  Returns 0 on success, or a negative error code.
785  */
786 int phy_startup(struct phy_device *phydev)
787 {
788         if (phydev->drv->startup)
789                 return phydev->drv->startup(phydev);
790
791         return 0;
792 }
793
794 __weak int board_phy_config(struct phy_device *phydev)
795 {
796         if (phydev->drv->config)
797                 return phydev->drv->config(phydev);
798         return 0;
799 }
800
801 int phy_config(struct phy_device *phydev)
802 {
803         /* Invoke an optional board-specific helper */
804         board_phy_config(phydev);
805
806         return 0;
807 }
808
809 int phy_shutdown(struct phy_device *phydev)
810 {
811         if (phydev->drv->shutdown)
812                 phydev->drv->shutdown(phydev);
813
814         return 0;
815 }