1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Generic PHY Management code
4 *
5 * Copyright 2011 Freescale Semiconductor, Inc.
6 * author Andy Fleming
7 *
8 * Based loosely off of Linux's PHY Lib
9 */
10
11 #include <config.h>
12 #include <common.h>
13 #include <console.h>
14 #include <dm.h>
15 #include <malloc.h>
16 #include <net.h>
17 #include <command.h>
18 #include <miiphy.h>
19 #include <phy.h>
20 #include <errno.h>
21 #include <linux/err.h>
22 #include <linux/compiler.h>
23
24 DECLARE_GLOBAL_DATA_PTR;
25
26 /* Generic PHY support and helper functions */
27
28 /**
29 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
30 * @phydev: target phy_device struct
31 *
32 * Description: Writes MII_ADVERTISE with the appropriate values,
33 * after sanitizing the values to make sure we only advertise
34 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
35 * hasn't changed, and > 0 if it has changed.
36 */
genphy_config_advert(struct phy_device * phydev)37 static int genphy_config_advert(struct phy_device *phydev)
38 {
39 u32 advertise;
40 int oldadv, adv, bmsr;
41 int err, changed = 0;
42
43 /* Only allow advertising what this PHY supports */
44 phydev->advertising &= phydev->supported;
45 advertise = phydev->advertising;
46
47 /* Setup standard advertisement */
48 adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
49 oldadv = adv;
50
51 if (adv < 0)
52 return adv;
53
54 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
55 ADVERTISE_PAUSE_ASYM);
56 if (advertise & ADVERTISED_10baseT_Half)
57 adv |= ADVERTISE_10HALF;
58 if (advertise & ADVERTISED_10baseT_Full)
59 adv |= ADVERTISE_10FULL;
60 if (advertise & ADVERTISED_100baseT_Half)
61 adv |= ADVERTISE_100HALF;
62 if (advertise & ADVERTISED_100baseT_Full)
63 adv |= ADVERTISE_100FULL;
64 if (advertise & ADVERTISED_Pause)
65 adv |= ADVERTISE_PAUSE_CAP;
66 if (advertise & ADVERTISED_Asym_Pause)
67 adv |= ADVERTISE_PAUSE_ASYM;
68 if (advertise & ADVERTISED_1000baseX_Half)
69 adv |= ADVERTISE_1000XHALF;
70 if (advertise & ADVERTISED_1000baseX_Full)
71 adv |= ADVERTISE_1000XFULL;
72
73 if (adv != oldadv) {
74 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
75
76 if (err < 0)
77 return err;
78 changed = 1;
79 }
80
81 bmsr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
82 if (bmsr < 0)
83 return bmsr;
84
85 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
86 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
87 * logical 1.
88 */
89 if (!(bmsr & BMSR_ESTATEN))
90 return changed;
91
92 /* Configure gigabit if it's supported */
93 adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
94 oldadv = adv;
95
96 if (adv < 0)
97 return adv;
98
99 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
100
101 if (phydev->supported & (SUPPORTED_1000baseT_Half |
102 SUPPORTED_1000baseT_Full)) {
103 if (advertise & SUPPORTED_1000baseT_Half)
104 adv |= ADVERTISE_1000HALF;
105 if (advertise & SUPPORTED_1000baseT_Full)
106 adv |= ADVERTISE_1000FULL;
107 }
108
109 if (adv != oldadv)
110 changed = 1;
111
112 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, adv);
113 if (err < 0)
114 return err;
115
116 return changed;
117 }
118
119 /**
120 * genphy_setup_forced - configures/forces speed/duplex from @phydev
121 * @phydev: target phy_device struct
122 *
123 * Description: Configures MII_BMCR to force speed/duplex
124 * to the values in phydev. Assumes that the values are valid.
125 */
genphy_setup_forced(struct phy_device * phydev)126 static int genphy_setup_forced(struct phy_device *phydev)
127 {
128 int err;
129 int ctl = BMCR_ANRESTART;
130
131 phydev->pause = 0;
132 phydev->asym_pause = 0;
133
134 if (phydev->speed == SPEED_1000)
135 ctl |= BMCR_SPEED1000;
136 else if (phydev->speed == SPEED_100)
137 ctl |= BMCR_SPEED100;
138
139 if (phydev->duplex == DUPLEX_FULL)
140 ctl |= BMCR_FULLDPLX;
141
142 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
143
144 return err;
145 }
146
147 /**
148 * genphy_restart_aneg - Enable and Restart Autonegotiation
149 * @phydev: target phy_device struct
150 */
genphy_restart_aneg(struct phy_device * phydev)151 int genphy_restart_aneg(struct phy_device *phydev)
152 {
153 int ctl;
154
155 ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
156
157 if (ctl < 0)
158 return ctl;
159
160 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
161
162 /* Don't isolate the PHY if we're negotiating */
163 ctl &= ~(BMCR_ISOLATE);
164
165 ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
166
167 return ctl;
168 }
169
170 /**
171 * genphy_config_aneg - restart auto-negotiation or write BMCR
172 * @phydev: target phy_device struct
173 *
174 * Description: If auto-negotiation is enabled, we configure the
175 * advertising, and then restart auto-negotiation. If it is not
176 * enabled, then we write the BMCR.
177 */
genphy_config_aneg(struct phy_device * phydev)178 int genphy_config_aneg(struct phy_device *phydev)
179 {
180 int result;
181
182 if (phydev->autoneg != AUTONEG_ENABLE)
183 return genphy_setup_forced(phydev);
184
185 result = genphy_config_advert(phydev);
186
187 if (result < 0) /* error */
188 return result;
189
190 if (result == 0) {
191 /*
192 * Advertisment hasn't changed, but maybe aneg was never on to
193 * begin with? Or maybe phy was isolated?
194 */
195 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
196
197 if (ctl < 0)
198 return ctl;
199
200 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
201 result = 1; /* do restart aneg */
202 }
203
204 /*
205 * Only restart aneg if we are advertising something different
206 * than we were before.
207 */
208 if (result > 0)
209 result = genphy_restart_aneg(phydev);
210
211 return result;
212 }
213
214 /**
215 * genphy_update_link - update link status in @phydev
216 * @phydev: target phy_device struct
217 *
218 * Description: Update the value in phydev->link to reflect the
219 * current link value. In order to do this, we need to read
220 * the status register twice, keeping the second value.
221 */
genphy_update_link(struct phy_device * phydev)222 int genphy_update_link(struct phy_device *phydev)
223 {
224 unsigned int mii_reg;
225
226 /*
227 * Wait if the link is up, and autonegotiation is in progress
228 * (ie - we're capable and it's not done)
229 */
230 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
231
232 /*
233 * If we already saw the link up, and it hasn't gone down, then
234 * we don't need to wait for autoneg again
235 */
236 if (phydev->link && mii_reg & BMSR_LSTATUS)
237 return 0;
238
239 if ((phydev->autoneg == AUTONEG_ENABLE) &&
240 !(mii_reg & BMSR_ANEGCOMPLETE)) {
241 int i = 0;
242
243 printf("%s Waiting for PHY auto negotiation to complete",
244 phydev->dev->name);
245 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
246 /*
247 * Timeout reached ?
248 */
249 if (i > PHY_ANEG_TIMEOUT) {
250 printf(" TIMEOUT !\n");
251 phydev->link = 0;
252 return -ETIMEDOUT;
253 }
254
255 if (ctrlc()) {
256 puts("user interrupt!\n");
257 phydev->link = 0;
258 return -EINTR;
259 }
260
261 if ((i++ % 500) == 0)
262 printf(".");
263
264 udelay(1000); /* 1 ms */
265 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
266 }
267 printf(" done\n");
268 phydev->link = 1;
269 } else {
270 /* Read the link a second time to clear the latched state */
271 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
272
273 if (mii_reg & BMSR_LSTATUS)
274 phydev->link = 1;
275 else
276 phydev->link = 0;
277 }
278
279 return 0;
280 }
281
282 /*
283 * Generic function which updates the speed and duplex. If
284 * autonegotiation is enabled, it uses the AND of the link
285 * partner's advertised capabilities and our advertised
286 * capabilities. If autonegotiation is disabled, we use the
287 * appropriate bits in the control register.
288 *
289 * Stolen from Linux's mii.c and phy_device.c
290 */
genphy_parse_link(struct phy_device * phydev)291 int genphy_parse_link(struct phy_device *phydev)
292 {
293 int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
294
295 /* We're using autonegotiation */
296 if (phydev->autoneg == AUTONEG_ENABLE) {
297 u32 lpa = 0;
298 int gblpa = 0;
299 u32 estatus = 0;
300
301 /* Check for gigabit capability */
302 if (phydev->supported & (SUPPORTED_1000baseT_Full |
303 SUPPORTED_1000baseT_Half)) {
304 /* We want a list of states supported by
305 * both PHYs in the link
306 */
307 gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
308 if (gblpa < 0) {
309 debug("Could not read MII_STAT1000. ");
310 debug("Ignoring gigabit capability\n");
311 gblpa = 0;
312 }
313 gblpa &= phy_read(phydev,
314 MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
315 }
316
317 /* Set the baseline so we only have to set them
318 * if they're different
319 */
320 phydev->speed = SPEED_10;
321 phydev->duplex = DUPLEX_HALF;
322
323 /* Check the gigabit fields */
324 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
325 phydev->speed = SPEED_1000;
326
327 if (gblpa & PHY_1000BTSR_1000FD)
328 phydev->duplex = DUPLEX_FULL;
329
330 /* We're done! */
331 return 0;
332 }
333
334 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
335 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
336
337 if (lpa & (LPA_100FULL | LPA_100HALF)) {
338 phydev->speed = SPEED_100;
339
340 if (lpa & LPA_100FULL)
341 phydev->duplex = DUPLEX_FULL;
342
343 } else if (lpa & LPA_10FULL) {
344 phydev->duplex = DUPLEX_FULL;
345 }
346
347 /*
348 * Extended status may indicate that the PHY supports
349 * 1000BASE-T/X even though the 1000BASE-T registers
350 * are missing. In this case we can't tell whether the
351 * peer also supports it, so we only check extended
352 * status if the 1000BASE-T registers are actually
353 * missing.
354 */
355 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
356 estatus = phy_read(phydev, MDIO_DEVAD_NONE,
357 MII_ESTATUS);
358
359 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
360 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
361 phydev->speed = SPEED_1000;
362 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
363 phydev->duplex = DUPLEX_FULL;
364 }
365
366 } else {
367 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
368
369 phydev->speed = SPEED_10;
370 phydev->duplex = DUPLEX_HALF;
371
372 if (bmcr & BMCR_FULLDPLX)
373 phydev->duplex = DUPLEX_FULL;
374
375 if (bmcr & BMCR_SPEED1000)
376 phydev->speed = SPEED_1000;
377 else if (bmcr & BMCR_SPEED100)
378 phydev->speed = SPEED_100;
379 }
380
381 return 0;
382 }
383
genphy_config(struct phy_device * phydev)384 int genphy_config(struct phy_device *phydev)
385 {
386 int val;
387 u32 features;
388
389 features = (SUPPORTED_TP | SUPPORTED_MII
390 | SUPPORTED_AUI | SUPPORTED_FIBRE |
391 SUPPORTED_BNC);
392
393 /* Do we support autonegotiation? */
394 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
395
396 if (val < 0)
397 return val;
398
399 if (val & BMSR_ANEGCAPABLE)
400 features |= SUPPORTED_Autoneg;
401
402 if (val & BMSR_100FULL)
403 features |= SUPPORTED_100baseT_Full;
404 if (val & BMSR_100HALF)
405 features |= SUPPORTED_100baseT_Half;
406 if (val & BMSR_10FULL)
407 features |= SUPPORTED_10baseT_Full;
408 if (val & BMSR_10HALF)
409 features |= SUPPORTED_10baseT_Half;
410
411 if (val & BMSR_ESTATEN) {
412 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
413
414 if (val < 0)
415 return val;
416
417 if (val & ESTATUS_1000_TFULL)
418 features |= SUPPORTED_1000baseT_Full;
419 if (val & ESTATUS_1000_THALF)
420 features |= SUPPORTED_1000baseT_Half;
421 if (val & ESTATUS_1000_XFULL)
422 features |= SUPPORTED_1000baseX_Full;
423 if (val & ESTATUS_1000_XHALF)
424 features |= SUPPORTED_1000baseX_Half;
425 }
426
427 phydev->supported &= features;
428 phydev->advertising &= features;
429
430 genphy_config_aneg(phydev);
431
432 return 0;
433 }
434
genphy_startup(struct phy_device * phydev)435 int genphy_startup(struct phy_device *phydev)
436 {
437 int ret;
438
439 ret = genphy_update_link(phydev);
440 if (ret)
441 return ret;
442
443 return genphy_parse_link(phydev);
444 }
445
genphy_shutdown(struct phy_device * phydev)446 int genphy_shutdown(struct phy_device *phydev)
447 {
448 return 0;
449 }
450
451 static struct phy_driver genphy_driver = {
452 .uid = 0xffffffff,
453 .mask = 0xffffffff,
454 .name = "Generic PHY",
455 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
456 SUPPORTED_AUI | SUPPORTED_FIBRE |
457 SUPPORTED_BNC,
458 .config = genphy_config,
459 .startup = genphy_startup,
460 .shutdown = genphy_shutdown,
461 };
462
463 static LIST_HEAD(phy_drivers);
464
phy_init(void)465 int phy_init(void)
466 {
467 #ifdef CONFIG_B53_SWITCH
468 phy_b53_init();
469 #endif
470 #ifdef CONFIG_MV88E61XX_SWITCH
471 phy_mv88e61xx_init();
472 #endif
473 #ifdef CONFIG_PHY_AQUANTIA
474 phy_aquantia_init();
475 #endif
476 #ifdef CONFIG_PHY_ATHEROS
477 phy_atheros_init();
478 #endif
479 #ifdef CONFIG_PHY_BROADCOM
480 phy_broadcom_init();
481 #endif
482 #ifdef CONFIG_PHY_CORTINA
483 phy_cortina_init();
484 #endif
485 #ifdef CONFIG_PHY_DAVICOM
486 phy_davicom_init();
487 #endif
488 #ifdef CONFIG_PHY_ET1011C
489 phy_et1011c_init();
490 #endif
491 #ifdef CONFIG_PHY_LXT
492 phy_lxt_init();
493 #endif
494 #ifdef CONFIG_PHY_MARVELL
495 phy_marvell_init();
496 #endif
497 #ifdef CONFIG_PHY_MICREL_KSZ8XXX
498 phy_micrel_ksz8xxx_init();
499 #endif
500 #ifdef CONFIG_PHY_MICREL_KSZ90X1
501 phy_micrel_ksz90x1_init();
502 #endif
503 #ifdef CONFIG_PHY_MESON_GXL
504 phy_meson_gxl_init();
505 #endif
506 #ifdef CONFIG_PHY_NATSEMI
507 phy_natsemi_init();
508 #endif
509 #ifdef CONFIG_PHY_REALTEK
510 phy_realtek_init();
511 #endif
512 #ifdef CONFIG_PHY_SMSC
513 phy_smsc_init();
514 #endif
515 #ifdef CONFIG_PHY_TERANETICS
516 phy_teranetics_init();
517 #endif
518 #ifdef CONFIG_PHY_TI
519 phy_ti_init();
520 #endif
521 #ifdef CONFIG_PHY_VITESSE
522 phy_vitesse_init();
523 #endif
524 #ifdef CONFIG_PHY_XILINX
525 phy_xilinx_init();
526 #endif
527 #ifdef CONFIG_PHY_MSCC
528 phy_mscc_init();
529 #endif
530 #ifdef CONFIG_PHY_FIXED
531 phy_fixed_init();
532 #endif
533 return 0;
534 }
535
phy_register(struct phy_driver * drv)536 int phy_register(struct phy_driver *drv)
537 {
538 INIT_LIST_HEAD(&drv->list);
539 list_add_tail(&drv->list, &phy_drivers);
540
541 #ifdef CONFIG_NEEDS_MANUAL_RELOC
542 if (drv->probe)
543 drv->probe += gd->reloc_off;
544 if (drv->config)
545 drv->config += gd->reloc_off;
546 if (drv->startup)
547 drv->startup += gd->reloc_off;
548 if (drv->shutdown)
549 drv->shutdown += gd->reloc_off;
550 if (drv->readext)
551 drv->readext += gd->reloc_off;
552 if (drv->writeext)
553 drv->writeext += gd->reloc_off;
554 #endif
555 return 0;
556 }
557
phy_set_supported(struct phy_device * phydev,u32 max_speed)558 int phy_set_supported(struct phy_device *phydev, u32 max_speed)
559 {
560 /* The default values for phydev->supported are provided by the PHY
561 * driver "features" member, we want to reset to sane defaults first
562 * before supporting higher speeds.
563 */
564 phydev->supported &= PHY_DEFAULT_FEATURES;
565
566 switch (max_speed) {
567 default:
568 return -ENOTSUPP;
569 case SPEED_1000:
570 phydev->supported |= PHY_1000BT_FEATURES;
571 /* fall through */
572 case SPEED_100:
573 phydev->supported |= PHY_100BT_FEATURES;
574 /* fall through */
575 case SPEED_10:
576 phydev->supported |= PHY_10BT_FEATURES;
577 }
578
579 return 0;
580 }
581
phy_probe(struct phy_device * phydev)582 static int phy_probe(struct phy_device *phydev)
583 {
584 int err = 0;
585
586 phydev->advertising = phydev->drv->features;
587 phydev->supported = phydev->drv->features;
588
589 phydev->mmds = phydev->drv->mmds;
590
591 if (phydev->drv->probe)
592 err = phydev->drv->probe(phydev);
593
594 return err;
595 }
596
generic_for_interface(phy_interface_t interface)597 static struct phy_driver *generic_for_interface(phy_interface_t interface)
598 {
599 #ifdef CONFIG_PHYLIB_10G
600 if (is_10g_interface(interface))
601 return &gen10g_driver;
602 #endif
603
604 return &genphy_driver;
605 }
606
get_phy_driver(struct phy_device * phydev,phy_interface_t interface)607 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
608 phy_interface_t interface)
609 {
610 struct list_head *entry;
611 int phy_id = phydev->phy_id;
612 struct phy_driver *drv = NULL;
613
614 list_for_each(entry, &phy_drivers) {
615 drv = list_entry(entry, struct phy_driver, list);
616 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
617 return drv;
618 }
619
620 /* If we made it here, there's no driver for this PHY */
621 return generic_for_interface(interface);
622 }
623
phy_device_create(struct mii_dev * bus,int addr,u32 phy_id,phy_interface_t interface)624 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
625 u32 phy_id,
626 phy_interface_t interface)
627 {
628 struct phy_device *dev;
629
630 /*
631 * We allocate the device, and initialize the
632 * default values
633 */
634 dev = malloc(sizeof(*dev));
635 if (!dev) {
636 printf("Failed to allocate PHY device for %s:%d\n",
637 bus->name, addr);
638 return NULL;
639 }
640
641 memset(dev, 0, sizeof(*dev));
642
643 dev->duplex = -1;
644 dev->link = 0;
645 dev->interface = interface;
646
647 dev->autoneg = AUTONEG_ENABLE;
648
649 dev->addr = addr;
650 dev->phy_id = phy_id;
651 dev->bus = bus;
652
653 dev->drv = get_phy_driver(dev, interface);
654
655 phy_probe(dev);
656
657 bus->phymap[addr] = dev;
658
659 return dev;
660 }
661
662 /**
663 * get_phy_id - reads the specified addr for its ID.
664 * @bus: the target MII bus
665 * @addr: PHY address on the MII bus
666 * @phy_id: where to store the ID retrieved.
667 *
668 * Description: Reads the ID registers of the PHY at @addr on the
669 * @bus, stores it in @phy_id and returns zero on success.
670 */
get_phy_id(struct mii_dev * bus,int addr,int devad,u32 * phy_id)671 int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
672 {
673 int phy_reg;
674
675 /*
676 * Grab the bits from PHYIR1, and put them
677 * in the upper half
678 */
679 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
680
681 if (phy_reg < 0)
682 return -EIO;
683
684 *phy_id = (phy_reg & 0xffff) << 16;
685
686 /* Grab the bits from PHYIR2, and put them in the lower half */
687 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
688
689 if (phy_reg < 0)
690 return -EIO;
691
692 *phy_id |= (phy_reg & 0xffff);
693
694 return 0;
695 }
696
create_phy_by_mask(struct mii_dev * bus,uint phy_mask,int devad,phy_interface_t interface)697 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
698 uint phy_mask, int devad,
699 phy_interface_t interface)
700 {
701 u32 phy_id = 0xffffffff;
702
703 while (phy_mask) {
704 int addr = ffs(phy_mask) - 1;
705 int r = get_phy_id(bus, addr, devad, &phy_id);
706 /* If the PHY ID is mostly f's, we didn't find anything */
707 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
708 return phy_device_create(bus, addr, phy_id, interface);
709 phy_mask &= ~(1 << addr);
710 }
711 return NULL;
712 }
713
search_for_existing_phy(struct mii_dev * bus,uint phy_mask,phy_interface_t interface)714 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
715 uint phy_mask,
716 phy_interface_t interface)
717 {
718 /* If we have one, return the existing device, with new interface */
719 while (phy_mask) {
720 int addr = ffs(phy_mask) - 1;
721
722 if (bus->phymap[addr]) {
723 bus->phymap[addr]->interface = interface;
724 return bus->phymap[addr];
725 }
726 phy_mask &= ~(1 << addr);
727 }
728 return NULL;
729 }
730
get_phy_device_by_mask(struct mii_dev * bus,uint phy_mask,phy_interface_t interface)731 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
732 uint phy_mask,
733 phy_interface_t interface)
734 {
735 int i;
736 struct phy_device *phydev;
737
738 phydev = search_for_existing_phy(bus, phy_mask, interface);
739 if (phydev)
740 return phydev;
741 /* Try Standard (ie Clause 22) access */
742 /* Otherwise we have to try Clause 45 */
743 for (i = 0; i < 5; i++) {
744 phydev = create_phy_by_mask(bus, phy_mask,
745 i ? i : MDIO_DEVAD_NONE, interface);
746 if (IS_ERR(phydev))
747 return NULL;
748 if (phydev)
749 return phydev;
750 }
751
752 debug("\n%s PHY: ", bus->name);
753 while (phy_mask) {
754 int addr = ffs(phy_mask) - 1;
755
756 debug("%d ", addr);
757 phy_mask &= ~(1 << addr);
758 }
759 debug("not found\n");
760
761 return NULL;
762 }
763
764 /**
765 * get_phy_device - reads the specified PHY device and returns its
766 * @phy_device struct
767 * @bus: the target MII bus
768 * @addr: PHY address on the MII bus
769 *
770 * Description: Reads the ID registers of the PHY at @addr on the
771 * @bus, then allocates and returns the phy_device to represent it.
772 */
get_phy_device(struct mii_dev * bus,int addr,phy_interface_t interface)773 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
774 phy_interface_t interface)
775 {
776 return get_phy_device_by_mask(bus, 1 << addr, interface);
777 }
778
phy_reset(struct phy_device * phydev)779 int phy_reset(struct phy_device *phydev)
780 {
781 int reg;
782 int timeout = 500;
783 int devad = MDIO_DEVAD_NONE;
784
785 if (phydev->flags & PHY_FLAG_BROKEN_RESET)
786 return 0;
787
788 #ifdef CONFIG_PHYLIB_10G
789 /* If it's 10G, we need to issue reset through one of the MMDs */
790 if (is_10g_interface(phydev->interface)) {
791 if (!phydev->mmds)
792 gen10g_discover_mmds(phydev);
793
794 devad = ffs(phydev->mmds) - 1;
795 }
796 #endif
797
798 if (phy_write(phydev, devad, MII_BMCR, BMCR_RESET) < 0) {
799 debug("PHY reset failed\n");
800 return -1;
801 }
802
803 #ifdef CONFIG_PHY_RESET_DELAY
804 udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
805 #endif
806 /*
807 * Poll the control register for the reset bit to go to 0 (it is
808 * auto-clearing). This should happen within 0.5 seconds per the
809 * IEEE spec.
810 */
811 reg = phy_read(phydev, devad, MII_BMCR);
812 while ((reg & BMCR_RESET) && timeout--) {
813 reg = phy_read(phydev, devad, MII_BMCR);
814
815 if (reg < 0) {
816 debug("PHY status read failed\n");
817 return -1;
818 }
819 udelay(1000);
820 }
821
822 if (reg & BMCR_RESET) {
823 puts("PHY reset timed out\n");
824 return -1;
825 }
826
827 return 0;
828 }
829
miiphy_reset(const char * devname,unsigned char addr)830 int miiphy_reset(const char *devname, unsigned char addr)
831 {
832 struct mii_dev *bus = miiphy_get_dev_by_name(devname);
833 struct phy_device *phydev;
834
835 /*
836 * miiphy_reset was only used on standard PHYs, so we'll fake it here.
837 * If later code tries to connect with the right interface, this will
838 * be corrected by get_phy_device in phy_connect()
839 */
840 phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
841
842 return phy_reset(phydev);
843 }
844
phy_find_by_mask(struct mii_dev * bus,uint phy_mask,phy_interface_t interface)845 struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask,
846 phy_interface_t interface)
847 {
848 /* Reset the bus */
849 if (bus->reset) {
850 bus->reset(bus);
851
852 /* Wait 15ms to make sure the PHY has come out of hard reset */
853 mdelay(15);
854 }
855
856 return get_phy_device_by_mask(bus, phy_mask, interface);
857 }
858
859 #ifdef CONFIG_DM_ETH
phy_connect_dev(struct phy_device * phydev,struct udevice * dev)860 void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
861 #else
862 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
863 #endif
864 {
865 /* Soft Reset the PHY */
866 phy_reset(phydev);
867 if (phydev->dev && phydev->dev != dev) {
868 printf("%s:%d is connected to %s. Reconnecting to %s\n",
869 phydev->bus->name, phydev->addr,
870 phydev->dev->name, dev->name);
871 }
872 phydev->dev = dev;
873 debug("%s connected to %s\n", dev->name, phydev->drv->name);
874 }
875
876 #ifdef CONFIG_DM_ETH
phy_connect(struct mii_dev * bus,int addr,struct udevice * dev,phy_interface_t interface)877 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
878 struct udevice *dev,
879 phy_interface_t interface)
880 #else
881 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
882 struct eth_device *dev,
883 phy_interface_t interface)
884 #endif
885 {
886 struct phy_device *phydev = NULL;
887 #ifdef CONFIG_PHY_FIXED
888 int sn;
889 const char *name;
890
891 sn = fdt_first_subnode(gd->fdt_blob, dev_of_offset(dev));
892 while (sn > 0) {
893 name = fdt_get_name(gd->fdt_blob, sn, NULL);
894 if (name && strcmp(name, "fixed-link") == 0) {
895 phydev = phy_device_create(bus,
896 sn, PHY_FIXED_ID, interface);
897 break;
898 }
899 sn = fdt_next_subnode(gd->fdt_blob, sn);
900 }
901 #endif
902 if (!phydev)
903 phydev = phy_find_by_mask(bus, 1 << addr, interface);
904
905 if (phydev)
906 phy_connect_dev(phydev, dev);
907 else
908 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
909 return phydev;
910 }
911
912 /*
913 * Start the PHY. Returns 0 on success, or a negative error code.
914 */
phy_startup(struct phy_device * phydev)915 int phy_startup(struct phy_device *phydev)
916 {
917 if (phydev->drv->startup)
918 return phydev->drv->startup(phydev);
919
920 return 0;
921 }
922
board_phy_config(struct phy_device * phydev)923 __weak int board_phy_config(struct phy_device *phydev)
924 {
925 if (phydev->drv->config)
926 return phydev->drv->config(phydev);
927 return 0;
928 }
929
phy_config(struct phy_device * phydev)930 int phy_config(struct phy_device *phydev)
931 {
932 /* Invoke an optional board-specific helper */
933 return board_phy_config(phydev);
934 }
935
phy_shutdown(struct phy_device * phydev)936 int phy_shutdown(struct phy_device *phydev)
937 {
938 if (phydev->drv->shutdown)
939 phydev->drv->shutdown(phydev);
940
941 return 0;
942 }
943
phy_get_interface_by_name(const char * str)944 int phy_get_interface_by_name(const char *str)
945 {
946 int i;
947
948 for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
949 if (!strcmp(str, phy_interface_strings[i]))
950 return i;
951 }
952
953 return -1;
954 }
955