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Andy Fleming5f184712011-04-08 02:10:27 -05001/*
2 * Generic PHY Management code
3 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02004 * SPDX-License-Identifier: GPL-2.0+
Andy Fleming5f184712011-04-08 02:10:27 -05005 *
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>
Troy Kisky1adb4062012-10-22 16:40:43 +000020#include <linux/err.h>
Andy Fleming5f184712011-04-08 02:10:27 -050021
22/* Generic PHY support and helper functions */
23
24/**
25 * genphy_config_advert - sanitize and advertise auto-negotation parameters
26 * @phydev: target phy_device struct
27 *
28 * Description: Writes MII_ADVERTISE with the appropriate values,
29 * after sanitizing the values to make sure we only advertise
30 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
31 * hasn't changed, and > 0 if it has changed.
32 */
Kim Phillips960d70c2012-10-29 13:34:34 +000033static int genphy_config_advert(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -050034{
35 u32 advertise;
36 int oldadv, adv;
37 int err, changed = 0;
38
39 /* Only allow advertising what
40 * this PHY supports */
41 phydev->advertising &= phydev->supported;
42 advertise = phydev->advertising;
43
44 /* Setup standard advertisement */
45 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
46
47 if (adv < 0)
48 return adv;
49
50 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
51 ADVERTISE_PAUSE_ASYM);
52 if (advertise & ADVERTISED_10baseT_Half)
53 adv |= ADVERTISE_10HALF;
54 if (advertise & ADVERTISED_10baseT_Full)
55 adv |= ADVERTISE_10FULL;
56 if (advertise & ADVERTISED_100baseT_Half)
57 adv |= ADVERTISE_100HALF;
58 if (advertise & ADVERTISED_100baseT_Full)
59 adv |= ADVERTISE_100FULL;
60 if (advertise & ADVERTISED_Pause)
61 adv |= ADVERTISE_PAUSE_CAP;
62 if (advertise & ADVERTISED_Asym_Pause)
63 adv |= ADVERTISE_PAUSE_ASYM;
Charles Coldwellde1d7862013-02-21 08:25:52 -050064 if (advertise & ADVERTISED_1000baseX_Half)
65 adv |= ADVERTISE_1000XHALF;
66 if (advertise & ADVERTISED_1000baseX_Full)
67 adv |= ADVERTISE_1000XFULL;
Andy Fleming5f184712011-04-08 02:10:27 -050068
69 if (adv != oldadv) {
70 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
71
72 if (err < 0)
73 return err;
74 changed = 1;
75 }
76
77 /* Configure gigabit if it's supported */
78 if (phydev->supported & (SUPPORTED_1000baseT_Half |
79 SUPPORTED_1000baseT_Full)) {
80 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
81
82 if (adv < 0)
83 return adv;
84
85 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
86 if (advertise & SUPPORTED_1000baseT_Half)
87 adv |= ADVERTISE_1000HALF;
88 if (advertise & SUPPORTED_1000baseT_Full)
89 adv |= ADVERTISE_1000FULL;
90
91 if (adv != oldadv) {
92 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
93 adv);
94
95 if (err < 0)
96 return err;
97 changed = 1;
98 }
99 }
100
101 return changed;
102}
103
104
105/**
106 * genphy_setup_forced - configures/forces speed/duplex from @phydev
107 * @phydev: target phy_device struct
108 *
109 * Description: Configures MII_BMCR to force speed/duplex
110 * to the values in phydev. Assumes that the values are valid.
111 */
Kim Phillips960d70c2012-10-29 13:34:34 +0000112static int genphy_setup_forced(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -0500113{
114 int err;
115 int ctl = 0;
116
117 phydev->pause = phydev->asym_pause = 0;
118
119 if (SPEED_1000 == phydev->speed)
120 ctl |= BMCR_SPEED1000;
121 else if (SPEED_100 == phydev->speed)
122 ctl |= BMCR_SPEED100;
123
124 if (DUPLEX_FULL == phydev->duplex)
125 ctl |= BMCR_FULLDPLX;
126
127 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
128
129 return err;
130}
131
132
133/**
134 * genphy_restart_aneg - Enable and Restart Autonegotiation
135 * @phydev: target phy_device struct
136 */
137int genphy_restart_aneg(struct phy_device *phydev)
138{
139 int ctl;
140
141 ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
142
143 if (ctl < 0)
144 return ctl;
145
146 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
147
148 /* Don't isolate the PHY if we're negotiating */
149 ctl &= ~(BMCR_ISOLATE);
150
151 ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
152
153 return ctl;
154}
155
156
157/**
158 * genphy_config_aneg - restart auto-negotiation or write BMCR
159 * @phydev: target phy_device struct
160 *
161 * Description: If auto-negotiation is enabled, we configure the
162 * advertising, and then restart auto-negotiation. If it is not
163 * enabled, then we write the BMCR.
164 */
165int genphy_config_aneg(struct phy_device *phydev)
166{
167 int result;
168
169 if (AUTONEG_ENABLE != phydev->autoneg)
170 return genphy_setup_forced(phydev);
171
172 result = genphy_config_advert(phydev);
173
174 if (result < 0) /* error */
175 return result;
176
177 if (result == 0) {
178 /* Advertisment hasn't changed, but maybe aneg was never on to
179 * begin with? Or maybe phy was isolated? */
180 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
181
182 if (ctl < 0)
183 return ctl;
184
185 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
186 result = 1; /* do restart aneg */
187 }
188
189 /* Only restart aneg if we are advertising something different
190 * than we were before. */
191 if (result > 0)
192 result = genphy_restart_aneg(phydev);
193
194 return result;
195}
196
197/**
198 * genphy_update_link - update link status in @phydev
199 * @phydev: target phy_device struct
200 *
201 * Description: Update the value in phydev->link to reflect the
202 * current link value. In order to do this, we need to read
203 * the status register twice, keeping the second value.
204 */
205int genphy_update_link(struct phy_device *phydev)
206{
207 unsigned int mii_reg;
208
209 /*
210 * Wait if the link is up, and autonegotiation is in progress
211 * (ie - we're capable and it's not done)
212 */
213 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
214
215 /*
216 * If we already saw the link up, and it hasn't gone down, then
217 * we don't need to wait for autoneg again
218 */
219 if (phydev->link && mii_reg & BMSR_LSTATUS)
220 return 0;
221
222 if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
223 int i = 0;
224
225 printf("%s Waiting for PHY auto negotiation to complete",
226 phydev->dev->name);
227 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
228 /*
229 * Timeout reached ?
230 */
231 if (i > PHY_ANEG_TIMEOUT) {
232 printf(" TIMEOUT !\n");
233 phydev->link = 0;
234 return 0;
235 }
236
237 if (ctrlc()) {
238 puts("user interrupt!\n");
239 phydev->link = 0;
240 return -EINTR;
241 }
242
243 if ((i++ % 500) == 0)
244 printf(".");
245
246 udelay(1000); /* 1 ms */
247 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
248 }
249 printf(" done\n");
250 phydev->link = 1;
251 } else {
252 /* Read the link a second time to clear the latched state */
253 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
254
255 if (mii_reg & BMSR_LSTATUS)
256 phydev->link = 1;
257 else
258 phydev->link = 0;
259 }
260
261 return 0;
262}
263
264/*
265 * Generic function which updates the speed and duplex. If
266 * autonegotiation is enabled, it uses the AND of the link
267 * partner's advertised capabilities and our advertised
268 * capabilities. If autonegotiation is disabled, we use the
269 * appropriate bits in the control register.
270 *
271 * Stolen from Linux's mii.c and phy_device.c
272 */
Yegor Yefremove2043f52012-11-28 11:15:17 +0100273int genphy_parse_link(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -0500274{
275 int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
276
277 /* We're using autonegotiation */
278 if (mii_reg & BMSR_ANEGCAPABLE) {
279 u32 lpa = 0;
280 u32 gblpa = 0;
Charles Coldwellde1d7862013-02-21 08:25:52 -0500281 u32 estatus = 0;
Andy Fleming5f184712011-04-08 02:10:27 -0500282
283 /* Check for gigabit capability */
284 if (mii_reg & BMSR_ERCAP) {
285 /* We want a list of states supported by
286 * both PHYs in the link
287 */
288 gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
289 gblpa &= phy_read(phydev,
290 MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
291 }
292
293 /* Set the baseline so we only have to set them
294 * if they're different
295 */
296 phydev->speed = SPEED_10;
297 phydev->duplex = DUPLEX_HALF;
298
299 /* Check the gigabit fields */
300 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
301 phydev->speed = SPEED_1000;
302
303 if (gblpa & PHY_1000BTSR_1000FD)
304 phydev->duplex = DUPLEX_FULL;
305
306 /* We're done! */
307 return 0;
308 }
309
310 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
311 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
312
Wolfgang Denk0dcfb0f2011-09-28 21:02:43 +0200313 if (lpa & (LPA_100FULL | LPA_100HALF)) {
Andy Fleming5f184712011-04-08 02:10:27 -0500314 phydev->speed = SPEED_100;
315
Wolfgang Denk0dcfb0f2011-09-28 21:02:43 +0200316 if (lpa & LPA_100FULL)
317 phydev->duplex = DUPLEX_FULL;
318
319 } else if (lpa & LPA_10FULL)
Andy Fleming5f184712011-04-08 02:10:27 -0500320 phydev->duplex = DUPLEX_FULL;
Charles Coldwellde1d7862013-02-21 08:25:52 -0500321
Sascha Silbe9ba30f62013-07-19 12:25:10 +0200322 /*
323 * Extended status may indicate that the PHY supports
324 * 1000BASE-T/X even though the 1000BASE-T registers
325 * are missing. In this case we can't tell whether the
326 * peer also supports it, so we only check extended
327 * status if the 1000BASE-T registers are actually
328 * missing.
329 */
330 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
Charles Coldwellde1d7862013-02-21 08:25:52 -0500331 estatus = phy_read(phydev, MDIO_DEVAD_NONE,
332 MII_ESTATUS);
333
334 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
335 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
336 phydev->speed = SPEED_1000;
337 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
338 phydev->duplex = DUPLEX_FULL;
339 }
340
Andy Fleming5f184712011-04-08 02:10:27 -0500341 } else {
342 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
343
344 phydev->speed = SPEED_10;
345 phydev->duplex = DUPLEX_HALF;
346
347 if (bmcr & BMCR_FULLDPLX)
348 phydev->duplex = DUPLEX_FULL;
349
350 if (bmcr & BMCR_SPEED1000)
351 phydev->speed = SPEED_1000;
352 else if (bmcr & BMCR_SPEED100)
353 phydev->speed = SPEED_100;
354 }
355
356 return 0;
357}
358
359int genphy_config(struct phy_device *phydev)
360{
361 int val;
362 u32 features;
363
364 /* For now, I'll claim that the generic driver supports
365 * all possible port types */
366 features = (SUPPORTED_TP | SUPPORTED_MII
367 | SUPPORTED_AUI | SUPPORTED_FIBRE |
368 SUPPORTED_BNC);
369
370 /* Do we support autonegotiation? */
371 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
372
373 if (val < 0)
374 return val;
375
376 if (val & BMSR_ANEGCAPABLE)
377 features |= SUPPORTED_Autoneg;
378
379 if (val & BMSR_100FULL)
380 features |= SUPPORTED_100baseT_Full;
381 if (val & BMSR_100HALF)
382 features |= SUPPORTED_100baseT_Half;
383 if (val & BMSR_10FULL)
384 features |= SUPPORTED_10baseT_Full;
385 if (val & BMSR_10HALF)
386 features |= SUPPORTED_10baseT_Half;
387
388 if (val & BMSR_ESTATEN) {
389 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
390
391 if (val < 0)
392 return val;
393
394 if (val & ESTATUS_1000_TFULL)
395 features |= SUPPORTED_1000baseT_Full;
396 if (val & ESTATUS_1000_THALF)
397 features |= SUPPORTED_1000baseT_Half;
Charles Coldwellde1d7862013-02-21 08:25:52 -0500398 if (val & ESTATUS_1000_XFULL)
399 features |= SUPPORTED_1000baseX_Full;
400 if (val & ESTATUS_1000_XHALF)
Fabio Estevam9a5dad22013-07-19 10:01:34 -0300401 features |= SUPPORTED_1000baseX_Half;
Andy Fleming5f184712011-04-08 02:10:27 -0500402 }
403
404 phydev->supported = features;
405 phydev->advertising = features;
406
407 genphy_config_aneg(phydev);
408
409 return 0;
410}
411
412int genphy_startup(struct phy_device *phydev)
413{
414 genphy_update_link(phydev);
415 genphy_parse_link(phydev);
416
417 return 0;
418}
419
420int genphy_shutdown(struct phy_device *phydev)
421{
422 return 0;
423}
424
425static struct phy_driver genphy_driver = {
426 .uid = 0xffffffff,
427 .mask = 0xffffffff,
428 .name = "Generic PHY",
429 .features = 0,
430 .config = genphy_config,
431 .startup = genphy_startup,
432 .shutdown = genphy_shutdown,
433};
434
435static LIST_HEAD(phy_drivers);
436
437int phy_init(void)
438{
Andy Fleming9082eea2011-04-07 21:56:05 -0500439#ifdef CONFIG_PHY_ATHEROS
440 phy_atheros_init();
441#endif
442#ifdef CONFIG_PHY_BROADCOM
443 phy_broadcom_init();
444#endif
445#ifdef CONFIG_PHY_DAVICOM
446 phy_davicom_init();
447#endif
Matt Porterf485c8a2013-03-20 05:38:13 +0000448#ifdef CONFIG_PHY_ET1011C
449 phy_et1011c_init();
450#endif
Yegor Yefremov0fae2502012-11-28 11:15:18 +0100451#ifdef CONFIG_PHY_ICPLUS
452 phy_icplus_init();
453#endif
Andy Fleming9082eea2011-04-07 21:56:05 -0500454#ifdef CONFIG_PHY_LXT
455 phy_lxt_init();
456#endif
457#ifdef CONFIG_PHY_MARVELL
458 phy_marvell_init();
459#endif
460#ifdef CONFIG_PHY_MICREL
461 phy_micrel_init();
462#endif
463#ifdef CONFIG_PHY_NATSEMI
464 phy_natsemi_init();
465#endif
466#ifdef CONFIG_PHY_REALTEK
467 phy_realtek_init();
468#endif
Nobuhiro Iwamatsu5751aa22011-11-23 21:24:15 +0000469#ifdef CONFIG_PHY_SMSC
470 phy_smsc_init();
471#endif
Andy Fleming9082eea2011-04-07 21:56:05 -0500472#ifdef CONFIG_PHY_TERANETICS
473 phy_teranetics_init();
474#endif
475#ifdef CONFIG_PHY_VITESSE
476 phy_vitesse_init();
477#endif
478
Andy Fleming5f184712011-04-08 02:10:27 -0500479 return 0;
480}
481
482int phy_register(struct phy_driver *drv)
483{
484 INIT_LIST_HEAD(&drv->list);
485 list_add_tail(&drv->list, &phy_drivers);
486
487 return 0;
488}
489
Kim Phillips960d70c2012-10-29 13:34:34 +0000490static int phy_probe(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -0500491{
492 int err = 0;
493
494 phydev->advertising = phydev->supported = phydev->drv->features;
495 phydev->mmds = phydev->drv->mmds;
496
497 if (phydev->drv->probe)
498 err = phydev->drv->probe(phydev);
499
500 return err;
501}
502
503static struct phy_driver *generic_for_interface(phy_interface_t interface)
504{
505#ifdef CONFIG_PHYLIB_10G
506 if (is_10g_interface(interface))
507 return &gen10g_driver;
508#endif
509
510 return &genphy_driver;
511}
512
Kim Phillips960d70c2012-10-29 13:34:34 +0000513static struct phy_driver *get_phy_driver(struct phy_device *phydev,
Andy Fleming5f184712011-04-08 02:10:27 -0500514 phy_interface_t interface)
515{
516 struct list_head *entry;
517 int phy_id = phydev->phy_id;
518 struct phy_driver *drv = NULL;
519
520 list_for_each(entry, &phy_drivers) {
521 drv = list_entry(entry, struct phy_driver, list);
522 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
523 return drv;
524 }
525
526 /* If we made it here, there's no driver for this PHY */
527 return generic_for_interface(interface);
528}
529
Kim Phillips960d70c2012-10-29 13:34:34 +0000530static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
531 int phy_id,
532 phy_interface_t interface)
Andy Fleming5f184712011-04-08 02:10:27 -0500533{
534 struct phy_device *dev;
535
536 /* We allocate the device, and initialize the
537 * default values */
538 dev = malloc(sizeof(*dev));
539 if (!dev) {
540 printf("Failed to allocate PHY device for %s:%d\n",
541 bus->name, addr);
542 return NULL;
543 }
544
545 memset(dev, 0, sizeof(*dev));
546
547 dev->duplex = -1;
548 dev->link = 1;
549 dev->interface = interface;
550
551 dev->autoneg = AUTONEG_ENABLE;
552
553 dev->addr = addr;
554 dev->phy_id = phy_id;
555 dev->bus = bus;
556
557 dev->drv = get_phy_driver(dev, interface);
558
559 phy_probe(dev);
560
561 bus->phymap[addr] = dev;
562
563 return dev;
564}
565
566/**
567 * get_phy_id - reads the specified addr for its ID.
568 * @bus: the target MII bus
569 * @addr: PHY address on the MII bus
570 * @phy_id: where to store the ID retrieved.
571 *
572 * Description: Reads the ID registers of the PHY at @addr on the
573 * @bus, stores it in @phy_id and returns zero on success.
574 */
Kim Phillips960d70c2012-10-29 13:34:34 +0000575static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
Andy Fleming5f184712011-04-08 02:10:27 -0500576{
577 int phy_reg;
578
579 /* Grab the bits from PHYIR1, and put them
580 * in the upper half */
581 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
582
583 if (phy_reg < 0)
584 return -EIO;
585
586 *phy_id = (phy_reg & 0xffff) << 16;
587
588 /* Grab the bits from PHYIR2, and put them in the lower half */
589 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
590
591 if (phy_reg < 0)
592 return -EIO;
593
594 *phy_id |= (phy_reg & 0xffff);
595
596 return 0;
597}
598
Troy Kisky1adb4062012-10-22 16:40:43 +0000599static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
600 unsigned phy_mask, int devad, phy_interface_t interface)
601{
602 u32 phy_id = 0xffffffff;
603 while (phy_mask) {
604 int addr = ffs(phy_mask) - 1;
605 int r = get_phy_id(bus, addr, devad, &phy_id);
606 if (r < 0)
607 return ERR_PTR(r);
608 /* If the PHY ID is mostly f's, we didn't find anything */
609 if ((phy_id & 0x1fffffff) != 0x1fffffff)
610 return phy_device_create(bus, addr, phy_id, interface);
611 phy_mask &= ~(1 << addr);
612 }
613 return NULL;
614}
615
616static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
617 unsigned phy_mask, phy_interface_t interface)
618{
619 /* If we have one, return the existing device, with new interface */
620 while (phy_mask) {
621 int addr = ffs(phy_mask) - 1;
622 if (bus->phymap[addr]) {
623 bus->phymap[addr]->interface = interface;
624 return bus->phymap[addr];
625 }
626 phy_mask &= ~(1 << addr);
627 }
628 return NULL;
629}
630
631static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
632 unsigned phy_mask, phy_interface_t interface)
633{
634 int i;
635 struct phy_device *phydev;
636
637 phydev = search_for_existing_phy(bus, phy_mask, interface);
638 if (phydev)
639 return phydev;
640 /* Try Standard (ie Clause 22) access */
641 /* Otherwise we have to try Clause 45 */
642 for (i = 0; i < 5; i++) {
643 phydev = create_phy_by_mask(bus, phy_mask,
644 i ? i : MDIO_DEVAD_NONE, interface);
645 if (IS_ERR(phydev))
646 return NULL;
647 if (phydev)
648 return phydev;
649 }
650 printf("Phy not found\n");
651 return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
652}
653
Andy Fleming5f184712011-04-08 02:10:27 -0500654/**
655 * get_phy_device - reads the specified PHY device and returns its @phy_device struct
656 * @bus: the target MII bus
657 * @addr: PHY address on the MII bus
658 *
659 * Description: Reads the ID registers of the PHY at @addr on the
660 * @bus, then allocates and returns the phy_device to represent it.
661 */
Kim Phillips960d70c2012-10-29 13:34:34 +0000662static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
663 phy_interface_t interface)
Andy Fleming5f184712011-04-08 02:10:27 -0500664{
Troy Kisky1adb4062012-10-22 16:40:43 +0000665 return get_phy_device_by_mask(bus, 1 << addr, interface);
Andy Fleming5f184712011-04-08 02:10:27 -0500666}
667
668int phy_reset(struct phy_device *phydev)
669{
670 int reg;
671 int timeout = 500;
672 int devad = MDIO_DEVAD_NONE;
673
674#ifdef CONFIG_PHYLIB_10G
675 /* If it's 10G, we need to issue reset through one of the MMDs */
676 if (is_10g_interface(phydev->interface)) {
677 if (!phydev->mmds)
678 gen10g_discover_mmds(phydev);
679
680 devad = ffs(phydev->mmds) - 1;
681 }
682#endif
683
684 reg = phy_read(phydev, devad, MII_BMCR);
685 if (reg < 0) {
686 debug("PHY status read failed\n");
687 return -1;
688 }
689
690 reg |= BMCR_RESET;
691
692 if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
693 debug("PHY reset failed\n");
694 return -1;
695 }
696
697#ifdef CONFIG_PHY_RESET_DELAY
698 udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
699#endif
700 /*
701 * Poll the control register for the reset bit to go to 0 (it is
702 * auto-clearing). This should happen within 0.5 seconds per the
703 * IEEE spec.
704 */
705 while ((reg & BMCR_RESET) && timeout--) {
706 reg = phy_read(phydev, devad, MII_BMCR);
707
708 if (reg < 0) {
709 debug("PHY status read failed\n");
710 return -1;
711 }
712 udelay(1000);
713 }
714
715 if (reg & BMCR_RESET) {
716 puts("PHY reset timed out\n");
717 return -1;
718 }
719
720 return 0;
721}
722
723int miiphy_reset(const char *devname, unsigned char addr)
724{
725 struct mii_dev *bus = miiphy_get_dev_by_name(devname);
726 struct phy_device *phydev;
727
728 /*
729 * miiphy_reset was only used on standard PHYs, so we'll fake it here.
730 * If later code tries to connect with the right interface, this will
731 * be corrected by get_phy_device in phy_connect()
732 */
733 phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
734
735 return phy_reset(phydev);
736}
737
Troy Kisky1adb4062012-10-22 16:40:43 +0000738struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
739 phy_interface_t interface)
Andy Fleming5f184712011-04-08 02:10:27 -0500740{
Andy Fleming5f184712011-04-08 02:10:27 -0500741 /* Reset the bus */
Vladimir Zapolskiye3a77212011-09-05 07:24:07 +0000742 if (bus->reset)
743 bus->reset(bus);
Andy Fleming5f184712011-04-08 02:10:27 -0500744
745 /* Wait 15ms to make sure the PHY has come out of hard reset */
746 udelay(15000);
Troy Kisky1adb4062012-10-22 16:40:43 +0000747 return get_phy_device_by_mask(bus, phy_mask, interface);
748}
Andy Fleming5f184712011-04-08 02:10:27 -0500749
Troy Kisky1adb4062012-10-22 16:40:43 +0000750void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
751{
Andy Fleming5f184712011-04-08 02:10:27 -0500752 /* Soft Reset the PHY */
753 phy_reset(phydev);
Troy Kisky1adb4062012-10-22 16:40:43 +0000754 if (phydev->dev) {
Andy Fleming5f184712011-04-08 02:10:27 -0500755 printf("%s:%d is connected to %s. Reconnecting to %s\n",
Troy Kisky1adb4062012-10-22 16:40:43 +0000756 phydev->bus->name, phydev->addr,
757 phydev->dev->name, dev->name);
758 }
Andy Fleming5f184712011-04-08 02:10:27 -0500759 phydev->dev = dev;
Wolfgang Denkb91a9d92011-07-24 21:39:10 +0000760 debug("%s connected to %s\n", dev->name, phydev->drv->name);
Troy Kisky1adb4062012-10-22 16:40:43 +0000761}
Andy Fleming5f184712011-04-08 02:10:27 -0500762
Troy Kisky1adb4062012-10-22 16:40:43 +0000763struct phy_device *phy_connect(struct mii_dev *bus, int addr,
764 struct eth_device *dev, phy_interface_t interface)
765{
766 struct phy_device *phydev;
767
768 phydev = phy_find_by_mask(bus, 1 << addr, interface);
769 if (phydev)
770 phy_connect_dev(phydev, dev);
771 else
772 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
Andy Fleming5f184712011-04-08 02:10:27 -0500773 return phydev;
774}
775
Timur Tabi6e5b9ac2012-07-05 10:33:18 +0000776/*
777 * Start the PHY. Returns 0 on success, or a negative error code.
778 */
Andy Fleming5f184712011-04-08 02:10:27 -0500779int phy_startup(struct phy_device *phydev)
780{
781 if (phydev->drv->startup)
Timur Tabi6e5b9ac2012-07-05 10:33:18 +0000782 return phydev->drv->startup(phydev);
Andy Fleming5f184712011-04-08 02:10:27 -0500783
784 return 0;
785}
786
787static int __board_phy_config(struct phy_device *phydev)
788{
Troy Kisky9fafe7d2012-02-07 14:08:49 +0000789 if (phydev->drv->config)
790 return phydev->drv->config(phydev);
Andy Fleming5f184712011-04-08 02:10:27 -0500791 return 0;
792}
793
794int board_phy_config(struct phy_device *phydev)
795 __attribute__((weak, alias("__board_phy_config")));
796
797int phy_config(struct phy_device *phydev)
798{
Andy Fleming5f184712011-04-08 02:10:27 -0500799 /* Invoke an optional board-specific helper */
800 board_phy_config(phydev);
801
802 return 0;
803}
804
805int phy_shutdown(struct phy_device *phydev)
806{
807 if (phydev->drv->shutdown)
808 phydev->drv->shutdown(phydev);
809
810 return 0;
811}