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 <console.h>
15 #include <dm.h>
16 #include <malloc.h>
17 #include <net.h>
18 #include <command.h>
19 #include <miiphy.h>
20 #include <phy.h>
21 #include <errno.h>
22 #include <linux/err.h>
23 #include <linux/compiler.h>
24
25 DECLARE_GLOBAL_DATA_PTR;
26
27 /* Generic PHY support and helper functions */
28
29 /**
30 * genphy_config_advert - sanitize and advertise auto-negotation parameters
31 * @phydev: target phy_device struct
32 *
33 * Description: Writes MII_ADVERTISE with the appropriate values,
34 * after sanitizing the values to make sure we only advertise
35 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
36 * hasn't changed, and > 0 if it has changed.
37 */
genphy_config_advert(struct phy_device * phydev)38 static int genphy_config_advert(struct phy_device *phydev)
39 {
40 u32 advertise;
41 int oldadv, adv, bmsr;
42 int err, changed = 0;
43
44 /* Only allow advertising what this PHY supports */
45 phydev->advertising &= phydev->supported;
46 advertise = phydev->advertising;
47
48 /* Setup standard advertisement */
49 adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
50 oldadv = adv;
51
52 if (adv < 0)
53 return adv;
54
55 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
56 ADVERTISE_PAUSE_ASYM);
57 if (advertise & ADVERTISED_10baseT_Half)
58 adv |= ADVERTISE_10HALF;
59 if (advertise & ADVERTISED_10baseT_Full)
60 adv |= ADVERTISE_10FULL;
61 if (advertise & ADVERTISED_100baseT_Half)
62 adv |= ADVERTISE_100HALF;
63 if (advertise & ADVERTISED_100baseT_Full)
64 adv |= ADVERTISE_100FULL;
65 if (advertise & ADVERTISED_Pause)
66 adv |= ADVERTISE_PAUSE_CAP;
67 if (advertise & ADVERTISED_Asym_Pause)
68 adv |= ADVERTISE_PAUSE_ASYM;
69 if (advertise & ADVERTISED_1000baseX_Half)
70 adv |= ADVERTISE_1000XHALF;
71 if (advertise & ADVERTISED_1000baseX_Full)
72 adv |= ADVERTISE_1000XFULL;
73
74 if (adv != oldadv) {
75 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
76
77 if (err < 0)
78 return err;
79 changed = 1;
80 }
81
82 bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
83 if (bmsr < 0)
84 return bmsr;
85
86 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
87 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
88 * logical 1.
89 */
90 if (!(bmsr & BMSR_ESTATEN))
91 return changed;
92
93 /* Configure gigabit if it's supported */
94 adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
95 oldadv = adv;
96
97 if (adv < 0)
98 return adv;
99
100 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
101
102 if (phydev->supported & (SUPPORTED_1000baseT_Half |
103 SUPPORTED_1000baseT_Full)) {
104 if (advertise & SUPPORTED_1000baseT_Half)
105 adv |= ADVERTISE_1000HALF;
106 if (advertise & SUPPORTED_1000baseT_Full)
107 adv |= ADVERTISE_1000FULL;
108 }
109
110 if (adv != oldadv)
111 changed = 1;
112
113 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
114 if (err < 0)
115 return err;
116
117 return changed;
118 }
119
120
121 /**
122 * genphy_setup_forced - configures/forces speed/duplex from @phydev
123 * @phydev: target phy_device struct
124 *
125 * Description: Configures MII_BMCR to force speed/duplex
126 * to the values in phydev. Assumes that the values are valid.
127 */
genphy_setup_forced(struct phy_device * phydev)128 static int genphy_setup_forced(struct phy_device *phydev)
129 {
130 int err;
131 int ctl = BMCR_ANRESTART;
132
133 phydev->pause = phydev->asym_pause = 0;
134
135 if (SPEED_1000 == phydev->speed)
136 ctl |= BMCR_SPEED1000;
137 else if (SPEED_100 == phydev->speed)
138 ctl |= BMCR_SPEED100;
139
140 if (DUPLEX_FULL == phydev->duplex)
141 ctl |= BMCR_FULLDPLX;
142
143 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
144
145 return err;
146 }
147
148
149 /**
150 * genphy_restart_aneg - Enable and Restart Autonegotiation
151 * @phydev: target phy_device struct
152 */
genphy_restart_aneg(struct phy_device * phydev)153 int genphy_restart_aneg(struct phy_device *phydev)
154 {
155 int ctl;
156
157 ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
158
159 if (ctl < 0)
160 return ctl;
161
162 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
163
164 /* Don't isolate the PHY if we're negotiating */
165 ctl &= ~(BMCR_ISOLATE);
166
167 ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
168
169 return ctl;
170 }
171
172
173 /**
174 * genphy_config_aneg - restart auto-negotiation or write BMCR
175 * @phydev: target phy_device struct
176 *
177 * Description: If auto-negotiation is enabled, we configure the
178 * advertising, and then restart auto-negotiation. If it is not
179 * enabled, then we write the BMCR.
180 */
genphy_config_aneg(struct phy_device * phydev)181 int genphy_config_aneg(struct phy_device *phydev)
182 {
183 int result;
184
185 if (AUTONEG_ENABLE != phydev->autoneg)
186 return genphy_setup_forced(phydev);
187
188 result = genphy_config_advert(phydev);
189
190 if (result < 0) /* error */
191 return result;
192
193 if (result == 0) {
194 /* Advertisment hasn't changed, but maybe aneg was never on to
195 * begin with? Or maybe phy was isolated? */
196 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
197
198 if (ctl < 0)
199 return ctl;
200
201 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
202 result = 1; /* do restart aneg */
203 }
204
205 /* Only restart aneg if we are advertising something different
206 * than we were before. */
207 if (result > 0)
208 result = genphy_restart_aneg(phydev);
209
210 return result;
211 }
212
213 /**
214 * genphy_update_link - update link status in @phydev
215 * @phydev: target phy_device struct
216 *
217 * Description: Update the value in phydev->link to reflect the
218 * current link value. In order to do this, we need to read
219 * the status register twice, keeping the second value.
220 */
genphy_update_link(struct phy_device * phydev)221 int genphy_update_link(struct phy_device *phydev)
222 {
223 unsigned int mii_reg;
224
225 /*
226 * Wait if the link is up, and autonegotiation is in progress
227 * (ie - we're capable and it's not done)
228 */
229 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
230
231 /*
232 * If we already saw the link up, and it hasn't gone down, then
233 * we don't need to wait for autoneg again
234 */
235 if (phydev->link && mii_reg & BMSR_LSTATUS)
236 return 0;
237
238 if ((phydev->autoneg == AUTONEG_ENABLE) &&
239 !(mii_reg & BMSR_ANEGCOMPLETE)) {
240 int i = 0;
241
242 printf("%s Waiting for PHY auto negotiation to complete",
243 phydev->dev->name);
244 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
245 /*
246 * Timeout reached ?
247 */
248 if (i > PHY_ANEG_TIMEOUT) {
249 printf(" TIMEOUT !\n");
250 phydev->link = 0;
251 return -ETIMEDOUT;
252 }
253
254 if (ctrlc()) {
255 puts("user interrupt!\n");
256 phydev->link = 0;
257 return -EINTR;
258 }
259
260 if ((i++ % 500) == 0)
261 printf(".");
262
263 udelay(1000); /* 1 ms */
264 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
265 }
266 printf(" done\n");
267 phydev->link = 1;
268 } else {
269 /* Read the link a second time to clear the latched state */
270 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
271
272 if (mii_reg & BMSR_LSTATUS)
273 phydev->link = 1;
274 else
275 phydev->link = 0;
276 }
277
278 return 0;
279 }
280
281 /*
282 * Generic function which updates the speed and duplex. If
283 * autonegotiation is enabled, it uses the AND of the link
284 * partner's advertised capabilities and our advertised
285 * capabilities. If autonegotiation is disabled, we use the
286 * appropriate bits in the control register.
287 *
288 * Stolen from Linux's mii.c and phy_device.c
289 */
genphy_parse_link(struct phy_device * phydev)290 int genphy_parse_link(struct phy_device *phydev)
291 {
292 int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
293
294 /* We're using autonegotiation */
295 if (phydev->autoneg == AUTONEG_ENABLE) {
296 u32 lpa = 0;
297 int gblpa = 0;
298 u32 estatus = 0;
299
300 /* Check for gigabit capability */
301 if (phydev->supported & (SUPPORTED_1000baseT_Full |
302 SUPPORTED_1000baseT_Half)) {
303 /* We want a list of states supported by
304 * both PHYs in the link
305 */
306 gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
307 if (gblpa < 0) {
308 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
309 gblpa = 0;
310 }
311 gblpa &= phy_read(phydev,
312 MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
313 }
314
315 /* Set the baseline so we only have to set them
316 * if they're different
317 */
318 phydev->speed = SPEED_10;
319 phydev->duplex = DUPLEX_HALF;
320
321 /* Check the gigabit fields */
322 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
323 phydev->speed = SPEED_1000;
324
325 if (gblpa & PHY_1000BTSR_1000FD)
326 phydev->duplex = DUPLEX_FULL;
327
328 /* We're done! */
329 return 0;
330 }
331
332 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
333 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
334
335 if (lpa & (LPA_100FULL | LPA_100HALF)) {
336 phydev->speed = SPEED_100;
337
338 if (lpa & LPA_100FULL)
339 phydev->duplex = DUPLEX_FULL;
340
341 } else if (lpa & LPA_10FULL)
342 phydev->duplex = DUPLEX_FULL;
343
344 /*
345 * Extended status may indicate that the PHY supports
346 * 1000BASE-T/X even though the 1000BASE-T registers
347 * are missing. In this case we can't tell whether the
348 * peer also supports it, so we only check extended
349 * status if the 1000BASE-T registers are actually
350 * missing.
351 */
352 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
353 estatus = phy_read(phydev, MDIO_DEVAD_NONE,
354 MII_ESTATUS);
355
356 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
357 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
358 phydev->speed = SPEED_1000;
359 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
360 phydev->duplex = DUPLEX_FULL;
361 }
362
363 } else {
364 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
365
366 phydev->speed = SPEED_10;
367 phydev->duplex = DUPLEX_HALF;
368
369 if (bmcr & BMCR_FULLDPLX)
370 phydev->duplex = DUPLEX_FULL;
371
372 if (bmcr & BMCR_SPEED1000)
373 phydev->speed = SPEED_1000;
374 else if (bmcr & BMCR_SPEED100)
375 phydev->speed = SPEED_100;
376 }
377
378 return 0;
379 }
380
genphy_config(struct phy_device * phydev)381 int genphy_config(struct phy_device *phydev)
382 {
383 int val;
384 u32 features;
385
386 features = (SUPPORTED_TP | SUPPORTED_MII
387 | SUPPORTED_AUI | SUPPORTED_FIBRE |
388 SUPPORTED_BNC);
389
390 /* Do we support autonegotiation? */
391 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
392
393 if (val < 0)
394 return val;
395
396 if (val & BMSR_ANEGCAPABLE)
397 features |= SUPPORTED_Autoneg;
398
399 if (val & BMSR_100FULL)
400 features |= SUPPORTED_100baseT_Full;
401 if (val & BMSR_100HALF)
402 features |= SUPPORTED_100baseT_Half;
403 if (val & BMSR_10FULL)
404 features |= SUPPORTED_10baseT_Full;
405 if (val & BMSR_10HALF)
406 features |= SUPPORTED_10baseT_Half;
407
408 if (val & BMSR_ESTATEN) {
409 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
410
411 if (val < 0)
412 return val;
413
414 if (val & ESTATUS_1000_TFULL)
415 features |= SUPPORTED_1000baseT_Full;
416 if (val & ESTATUS_1000_THALF)
417 features |= SUPPORTED_1000baseT_Half;
418 if (val & ESTATUS_1000_XFULL)
419 features |= SUPPORTED_1000baseX_Full;
420 if (val & ESTATUS_1000_XHALF)
421 features |= SUPPORTED_1000baseX_Half;
422 }
423
424 phydev->supported &= features;
425 phydev->advertising &= features;
426
427 genphy_config_aneg(phydev);
428
429 return 0;
430 }
431
genphy_startup(struct phy_device * phydev)432 int genphy_startup(struct phy_device *phydev)
433 {
434 int ret;
435
436 ret = genphy_update_link(phydev);
437 if (ret)
438 return ret;
439
440 return genphy_parse_link(phydev);
441 }
442
genphy_shutdown(struct phy_device * phydev)443 int genphy_shutdown(struct phy_device *phydev)
444 {
445 return 0;
446 }
447
448 static struct phy_driver genphy_driver = {
449 .uid = 0xffffffff,
450 .mask = 0xffffffff,
451 .name = "Generic PHY",
452 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
453 SUPPORTED_AUI | SUPPORTED_FIBRE |
454 SUPPORTED_BNC,
455 .config = genphy_config,
456 .startup = genphy_startup,
457 .shutdown = genphy_shutdown,
458 };
459
460 static LIST_HEAD(phy_drivers);
461
phy_init(void)462 int phy_init(void)
463 {
464 #ifdef CONFIG_MV88E61XX_SWITCH
465 phy_mv88e61xx_init();
466 #endif
467 #ifdef CONFIG_PHY_AQUANTIA
468 phy_aquantia_init();
469 #endif
470 #ifdef CONFIG_PHY_ATHEROS
471 phy_atheros_init();
472 #endif
473 #ifdef CONFIG_PHY_BROADCOM
474 phy_broadcom_init();
475 #endif
476 #ifdef CONFIG_PHY_CORTINA
477 phy_cortina_init();
478 #endif
479 #ifdef CONFIG_PHY_DAVICOM
480 phy_davicom_init();
481 #endif
482 #ifdef CONFIG_PHY_ET1011C
483 phy_et1011c_init();
484 #endif
485 #ifdef CONFIG_PHY_LXT
486 phy_lxt_init();
487 #endif
488 #ifdef CONFIG_PHY_MARVELL
489 phy_marvell_init();
490 #endif
491 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
492 phy_micrel_ksz8xxx_init();
493 #endif
494 #ifdef CONFIG_PHY_MICREL_KSZ90X1
495 phy_micrel_ksz90x1_init();
496 #endif
497 #ifdef CONFIG_PHY_NATSEMI
498 phy_natsemi_init();
499 #endif
500 #ifdef CONFIG_PHY_REALTEK
501 phy_realtek_init();
502 #endif
503 #ifdef CONFIG_PHY_RK630
504 phy_rk630_init();
505 #endif
506 #ifdef CONFIG_PHY_SMSC
507 phy_smsc_init();
508 #endif
509 #ifdef CONFIG_PHY_TERANETICS
510 phy_teranetics_init();
511 #endif
512 #ifdef CONFIG_PHY_TI
513 phy_ti_init();
514 #endif
515 #ifdef CONFIG_PHY_VITESSE
516 phy_vitesse_init();
517 #endif
518 #ifdef CONFIG_PHY_XILINX
519 phy_xilinx_init();
520 #endif
521 #ifdef CONFIG_PHY_MSCC
522 phy_mscc_init();
523 #endif
524 #ifdef CONFIG_PHY_FIXED
525 phy_fixed_init();
526 #endif
527 return 0;
528 }
529
phy_register(struct phy_driver * drv)530 int phy_register(struct phy_driver *drv)
531 {
532 INIT_LIST_HEAD(&drv->list);
533 list_add_tail(&drv->list, &phy_drivers);
534
535 #ifdef CONFIG_NEEDS_MANUAL_RELOC
536 if (drv->probe)
537 drv->probe += gd->reloc_off;
538 if (drv->config)
539 drv->config += gd->reloc_off;
540 if (drv->startup)
541 drv->startup += gd->reloc_off;
542 if (drv->shutdown)
543 drv->shutdown += gd->reloc_off;
544 if (drv->readext)
545 drv->readext += gd->reloc_off;
546 if (drv->writeext)
547 drv->writeext += gd->reloc_off;
548 if (drv->read_mmd)
549 drv->read_mmd += gd->reloc_off;
550 if (drv->write_mmd)
551 drv->write_mmd += gd->reloc_off;
552 #endif
553 return 0;
554 }
555
phy_set_supported(struct phy_device * phydev,u32 max_speed)556 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
557 {
558 /* The default values for phydev->supported are provided by the PHY
559 * driver "features" member, we want to reset to sane defaults first
560 * before supporting higher speeds.
561 */
562 phydev->supported &= PHY_DEFAULT_FEATURES;
563
564 switch (max_speed) {
565 default:
566 return -ENOTSUPP;
567 case SPEED_1000:
568 phydev->supported |= PHY_1000BT_FEATURES;
569 /* fall through */
570 case SPEED_100:
571 phydev->supported |= PHY_100BT_FEATURES;
572 /* fall through */
573 case SPEED_10:
574 phydev->supported |= PHY_10BT_FEATURES;
575 }
576
577 return 0;
578 }
579
phy_probe(struct phy_device * phydev)580 static int phy_probe(struct phy_device *phydev)
581 {
582 int err = 0;
583
584 phydev->advertising = phydev->supported = phydev->drv->features;
585 phydev->mmds = phydev->drv->mmds;
586
587 if (phydev->drv->probe)
588 err = phydev->drv->probe(phydev);
589
590 return err;
591 }
592
generic_for_interface(phy_interface_t interface)593 static struct phy_driver *generic_for_interface(phy_interface_t interface)
594 {
595 #ifdef CONFIG_PHYLIB_10G
596 if (is_10g_interface(interface))
597 return &gen10g_driver;
598 #endif
599
600 return &genphy_driver;
601 }
602
get_phy_driver(struct phy_device * phydev,phy_interface_t interface)603 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
604 phy_interface_t interface)
605 {
606 struct list_head *entry;
607 int phy_id = phydev->phy_id;
608 struct phy_driver *drv = NULL;
609
610 list_for_each(entry, &phy_drivers) {
611 drv = list_entry(entry, struct phy_driver, list);
612 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
613 return drv;
614 }
615
616 /* If we made it here, there's no driver for this PHY */
617 return generic_for_interface(interface);
618 }
619
phy_device_create(struct mii_dev * bus,int addr,u32 phy_id,bool is_c45,phy_interface_t interface)620 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
621 u32 phy_id, bool is_c45,
622 phy_interface_t interface)
623 {
624 struct phy_device *dev;
625
626 /* We allocate the device, and initialize the
627 * default values */
628 dev = malloc(sizeof(*dev));
629 if (!dev) {
630 printf("Failed to allocate PHY device for %s:%d\n",
631 bus->name, addr);
632 return NULL;
633 }
634
635 memset(dev, 0, sizeof(*dev));
636
637 dev->duplex = -1;
638 dev->link = 0;
639 dev->interface = interface;
640
641 #ifdef CONFIG_DM_ETH
642 dev->node = ofnode_null();
643 #endif
644
645 dev->autoneg = AUTONEG_ENABLE;
646
647 dev->addr = addr;
648 dev->phy_id = phy_id;
649 dev->is_c45 = is_c45;
650 dev->bus = bus;
651
652 dev->drv = get_phy_driver(dev, interface);
653
654 phy_probe(dev);
655
656 bus->phymap[addr] = dev;
657
658 return dev;
659 }
660
661 /**
662 * get_phy_id - reads the specified addr for its ID.
663 * @bus: the target MII bus
664 * @addr: PHY address on the MII bus
665 * @phy_id: where to store the ID retrieved.
666 *
667 * Description: Reads the ID registers of the PHY at @addr on the
668 * @bus, stores it in @phy_id and returns zero on success.
669 */
get_phy_id(struct mii_dev * bus,int addr,int devad,u32 * phy_id)670 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
671 {
672 int phy_reg;
673
674 /* Grab the bits from PHYIR1, and put them
675 * in the upper half */
676 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
677
678 if (phy_reg < 0)
679 return -EIO;
680
681 *phy_id = (phy_reg & 0xffff) << 16;
682
683 /* Grab the bits from PHYIR2, and put them in the lower half */
684 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
685
686 if (phy_reg < 0)
687 return -EIO;
688
689 *phy_id |= (phy_reg & 0xffff);
690
691 return 0;
692 }
693
create_phy_by_mask(struct mii_dev * bus,unsigned phy_mask,int devad,phy_interface_t interface)694 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
695 unsigned phy_mask, int devad, phy_interface_t interface)
696 {
697 u32 phy_id = 0xffffffff;
698 bool is_c45;
699
700 while (phy_mask) {
701 int addr = ffs(phy_mask) - 1;
702 int r = get_phy_id(bus, addr, devad, &phy_id);
703 /* If the PHY ID is mostly f's, we didn't find anything */
704 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff) {
705 is_c45 = (devad == MDIO_DEVAD_NONE) ? false : true;
706 return phy_device_create(bus, addr, phy_id, is_c45,
707 interface);
708 }
709 phy_mask &= ~(1 << addr);
710 }
711 return NULL;
712 }
713
search_for_existing_phy(struct mii_dev * bus,unsigned phy_mask,phy_interface_t interface)714 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
715 unsigned phy_mask, phy_interface_t interface)
716 {
717 /* If we have one, return the existing device, with new interface */
718 while (phy_mask) {
719 int addr = ffs(phy_mask) - 1;
720 if (bus->phymap[addr]) {
721 bus->phymap[addr]->interface = interface;
722 return bus->phymap[addr];
723 }
724 phy_mask &= ~(1 << addr);
725 }
726 return NULL;
727 }
728
get_phy_device_by_mask(struct mii_dev * bus,unsigned phy_mask,phy_interface_t interface)729 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
730 unsigned phy_mask, phy_interface_t interface)
731 {
732 int i;
733 struct phy_device *phydev;
734
735 phydev = search_for_existing_phy(bus, phy_mask, interface);
736 if (phydev)
737 return phydev;
738 /* Try Standard (ie Clause 22) access */
739 /* Otherwise we have to try Clause 45 */
740 for (i = 0; i < 5; i++) {
741 phydev = create_phy_by_mask(bus, phy_mask,
742 i ? i : MDIO_DEVAD_NONE, interface);
743 if (IS_ERR(phydev))
744 return NULL;
745 if (phydev)
746 return phydev;
747 }
748
749 debug("\n%s PHY: ", bus->name);
750 while (phy_mask) {
751 int addr = ffs(phy_mask) - 1;
752 debug("%d ", addr);
753 phy_mask &= ~(1 << addr);
754 }
755 debug("not found\n");
756
757 return NULL;
758 }
759
760 /**
761 * get_phy_device - reads the specified PHY device and returns its @phy_device struct
762 * @bus: the target MII bus
763 * @addr: PHY address on the MII bus
764 *
765 * Description: Reads the ID registers of the PHY at @addr on the
766 * @bus, then allocates and returns the phy_device to represent it.
767 */
get_phy_device(struct mii_dev * bus,int addr,phy_interface_t interface)768 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
769 phy_interface_t interface)
770 {
771 return get_phy_device_by_mask(bus, 1 << addr, interface);
772 }
773
phy_reset(struct phy_device * phydev)774 int phy_reset(struct phy_device *phydev)
775 {
776 int reg;
777 int timeout = 500;
778 int devad = MDIO_DEVAD_NONE;
779
780 if (phydev->flags & PHY_FLAG_BROKEN_RESET)
781 return 0;
782
783 #ifdef CONFIG_PHYLIB_10G
784 /* If it's 10G, we need to issue reset through one of the MMDs */
785 if (is_10g_interface(phydev->interface)) {
786 if (!phydev->mmds)
787 gen10g_discover_mmds(phydev);
788
789 devad = ffs(phydev->mmds) - 1;
790 }
791 #endif
792
793 if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
794 debug("PHY reset failed\n");
795 return -1;
796 }
797
798 #ifdef CONFIG_PHY_RESET_DELAY
799 udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
800 #endif
801 /*
802 * Poll the control register for the reset bit to go to 0 (it is
803 * auto-clearing). This should happen within 0.5 seconds per the
804 * IEEE spec.
805 */
806 reg = phy_read(phydev, devad, MII_BMCR);
807 while ((reg & BMCR_RESET) && timeout--) {
808 reg = phy_read(phydev, devad, MII_BMCR);
809
810 if (reg < 0) {
811 debug("PHY status read failed\n");
812 return -1;
813 }
814 udelay(1000);
815 }
816
817 if (reg & BMCR_RESET) {
818 puts("PHY reset timed out\n");
819 return -1;
820 }
821
822 return 0;
823 }
824
miiphy_reset(const char * devname,unsigned char addr)825 int miiphy_reset(const char *devname, unsigned char addr)
826 {
827 struct mii_dev *bus = miiphy_get_dev_by_name(devname);
828 struct phy_device *phydev;
829
830 /*
831 * miiphy_reset was only used on standard PHYs, so we'll fake it here.
832 * If later code tries to connect with the right interface, this will
833 * be corrected by get_phy_device in phy_connect()
834 */
835 phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
836
837 return phy_reset(phydev);
838 }
839
phy_find_by_mask(struct mii_dev * bus,unsigned phy_mask,phy_interface_t interface)840 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
841 phy_interface_t interface)
842 {
843 /* Reset the bus */
844 if (bus->reset) {
845 bus->reset(bus);
846
847 /* Wait 15ms to make sure the PHY has come out of hard reset */
848 udelay(15000);
849 }
850
851 return get_phy_device_by_mask(bus, phy_mask, interface);
852 }
853
854 #ifdef CONFIG_DM_ETH
phy_connect_dev(struct phy_device * phydev,struct udevice * dev)855 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
856 #else
857 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
858 #endif
859 {
860 /* Soft Reset the PHY */
861 phy_reset(phydev);
862 if (phydev->dev && phydev->dev != dev) {
863 printf("%s:%d is connected to %s. Reconnecting to %s\n",
864 phydev->bus->name, phydev->addr,
865 phydev->dev->name, dev->name);
866 }
867 phydev->dev = dev;
868 debug("%s connected to %s\n", dev->name, phydev->drv->name);
869 }
870
871 #ifdef CONFIG_DM_ETH
phy_connect(struct mii_dev * bus,int addr,struct udevice * dev,phy_interface_t interface)872 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
873 struct udevice *dev, phy_interface_t interface)
874 #else
875 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
876 struct eth_device *dev, phy_interface_t interface)
877 #endif
878 {
879 struct phy_device *phydev = NULL;
880 #ifdef CONFIG_PHY_FIXED
881 int sn;
882 const char *name;
883 sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
884 while (sn > 0) {
885 name = fdt_get_name(gd->fdt_blob, sn, NULL);
886 if (name && strcmp(name, "fixed-link") == 0) {
887 phydev = phy_device_create(bus, sn, PHY_FIXED_ID, false,
888 interface);
889 break;
890 }
891 sn = fdt_next_subnode(gd->fdt_blob, sn);
892 }
893 #endif
894 if (phydev == NULL)
895 phydev = phy_find_by_mask(bus, 1 << addr, interface);
896
897 if (phydev)
898 phy_connect_dev(phydev, dev);
899 else
900 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
901 return phydev;
902 }
903
904 /*
905 * Start the PHY. Returns 0 on success, or a negative error code.
906 */
phy_startup(struct phy_device * phydev)907 int phy_startup(struct phy_device *phydev)
908 {
909 if (phydev->drv->startup)
910 return phydev->drv->startup(phydev);
911
912 return 0;
913 }
914
board_phy_config(struct phy_device * phydev)915 __weak int board_phy_config(struct phy_device *phydev)
916 {
917 if (phydev->drv->config)
918 return phydev->drv->config(phydev);
919 return 0;
920 }
921
phy_config(struct phy_device * phydev)922 int phy_config(struct phy_device *phydev)
923 {
924 /* Invoke an optional board-specific helper */
925 return board_phy_config(phydev);
926 }
927
phy_shutdown(struct phy_device * phydev)928 int phy_shutdown(struct phy_device *phydev)
929 {
930 if (phydev->drv->shutdown)
931 phydev->drv->shutdown(phydev);
932
933 return 0;
934 }
935
phy_get_interface_by_name(const char * str)936 int phy_get_interface_by_name(const char *str)
937 {
938 int i;
939
940 for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
941 if (!strcmp(str, phy_interface_strings[i]))
942 return i;
943 }
944
945 return -1;
946 }
947