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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>
Simon Glassc74c8e62015-04-05 16:07:39 -060014#include <dm.h>
Andy Fleming5f184712011-04-08 02:10:27 -050015#include <malloc.h>
16#include <net.h>
17#include <command.h>
18#include <miiphy.h>
19#include <phy.h>
20#include <errno.h>
Troy Kisky1adb4062012-10-22 16:40:43 +000021#include <linux/err.h>
Shengzhou Liu597fe042014-04-11 16:14:17 +080022#include <linux/compiler.h>
Andy Fleming5f184712011-04-08 02:10:27 -050023
Michal Simekabbfcbe2015-05-13 13:40:40 +020024DECLARE_GLOBAL_DATA_PTR;
25
Andy Fleming5f184712011-04-08 02:10:27 -050026/* Generic PHY support and helper functions */
27
28/**
29 * genphy_config_advert - sanitize and advertise auto-negotation 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 */
Kim Phillips960d70c2012-10-29 13:34:34 +000037static int genphy_config_advert(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -050038{
39 u32 advertise;
40 int oldadv, adv;
41 int err, changed = 0;
42
43 /* Only allow advertising what
44 * this PHY supports */
45 phydev->advertising &= phydev->supported;
46 advertise = phydev->advertising;
47
48 /* Setup standard advertisement */
49 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
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;
Charles Coldwellde1d7862013-02-21 08:25:52 -050068 if (advertise & ADVERTISED_1000baseX_Half)
69 adv |= ADVERTISE_1000XHALF;
70 if (advertise & ADVERTISED_1000baseX_Full)
71 adv |= ADVERTISE_1000XFULL;
Andy Fleming5f184712011-04-08 02:10:27 -050072
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 /* Configure gigabit if it's supported */
82 if (phydev->supported & (SUPPORTED_1000baseT_Half |
83 SUPPORTED_1000baseT_Full)) {
84 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
85
86 if (adv < 0)
87 return adv;
88
89 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
90 if (advertise & SUPPORTED_1000baseT_Half)
91 adv |= ADVERTISE_1000HALF;
92 if (advertise & SUPPORTED_1000baseT_Full)
93 adv |= ADVERTISE_1000FULL;
94
95 if (adv != oldadv) {
96 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
97 adv);
98
99 if (err < 0)
100 return err;
101 changed = 1;
102 }
103 }
104
105 return changed;
106}
107
108
109/**
110 * genphy_setup_forced - configures/forces speed/duplex from @phydev
111 * @phydev: target phy_device struct
112 *
113 * Description: Configures MII_BMCR to force speed/duplex
114 * to the values in phydev. Assumes that the values are valid.
115 */
Kim Phillips960d70c2012-10-29 13:34:34 +0000116static int genphy_setup_forced(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -0500117{
118 int err;
119 int ctl = 0;
120
121 phydev->pause = phydev->asym_pause = 0;
122
123 if (SPEED_1000 == phydev->speed)
124 ctl |= BMCR_SPEED1000;
125 else if (SPEED_100 == phydev->speed)
126 ctl |= BMCR_SPEED100;
127
128 if (DUPLEX_FULL == phydev->duplex)
129 ctl |= BMCR_FULLDPLX;
130
131 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
132
133 return err;
134}
135
136
137/**
138 * genphy_restart_aneg - Enable and Restart Autonegotiation
139 * @phydev: target phy_device struct
140 */
141int genphy_restart_aneg(struct phy_device *phydev)
142{
143 int ctl;
144
145 ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
146
147 if (ctl < 0)
148 return ctl;
149
150 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
151
152 /* Don't isolate the PHY if we're negotiating */
153 ctl &= ~(BMCR_ISOLATE);
154
155 ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
156
157 return ctl;
158}
159
160
161/**
162 * genphy_config_aneg - restart auto-negotiation or write BMCR
163 * @phydev: target phy_device struct
164 *
165 * Description: If auto-negotiation is enabled, we configure the
166 * advertising, and then restart auto-negotiation. If it is not
167 * enabled, then we write the BMCR.
168 */
169int genphy_config_aneg(struct phy_device *phydev)
170{
171 int result;
172
173 if (AUTONEG_ENABLE != phydev->autoneg)
174 return genphy_setup_forced(phydev);
175
176 result = genphy_config_advert(phydev);
177
178 if (result < 0) /* error */
179 return result;
180
181 if (result == 0) {
182 /* Advertisment hasn't changed, but maybe aneg was never on to
183 * begin with? Or maybe phy was isolated? */
184 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
185
186 if (ctl < 0)
187 return ctl;
188
189 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
190 result = 1; /* do restart aneg */
191 }
192
193 /* Only restart aneg if we are advertising something different
194 * than we were before. */
195 if (result > 0)
196 result = genphy_restart_aneg(phydev);
197
198 return result;
199}
200
201/**
202 * genphy_update_link - update link status in @phydev
203 * @phydev: target phy_device struct
204 *
205 * Description: Update the value in phydev->link to reflect the
206 * current link value. In order to do this, we need to read
207 * the status register twice, keeping the second value.
208 */
209int genphy_update_link(struct phy_device *phydev)
210{
211 unsigned int mii_reg;
212
213 /*
214 * Wait if the link is up, and autonegotiation is in progress
215 * (ie - we're capable and it's not done)
216 */
217 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
218
219 /*
220 * If we already saw the link up, and it hasn't gone down, then
221 * we don't need to wait for autoneg again
222 */
223 if (phydev->link && mii_reg & BMSR_LSTATUS)
224 return 0;
225
226 if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
227 int i = 0;
228
229 printf("%s Waiting for PHY auto negotiation to complete",
230 phydev->dev->name);
231 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
232 /*
233 * Timeout reached ?
234 */
235 if (i > PHY_ANEG_TIMEOUT) {
236 printf(" TIMEOUT !\n");
237 phydev->link = 0;
238 return 0;
239 }
240
241 if (ctrlc()) {
242 puts("user interrupt!\n");
243 phydev->link = 0;
244 return -EINTR;
245 }
246
247 if ((i++ % 500) == 0)
248 printf(".");
249
250 udelay(1000); /* 1 ms */
251 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
252 }
253 printf(" done\n");
254 phydev->link = 1;
255 } else {
256 /* Read the link a second time to clear the latched state */
257 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
258
259 if (mii_reg & BMSR_LSTATUS)
260 phydev->link = 1;
261 else
262 phydev->link = 0;
263 }
264
265 return 0;
266}
267
268/*
269 * Generic function which updates the speed and duplex. If
270 * autonegotiation is enabled, it uses the AND of the link
271 * partner's advertised capabilities and our advertised
272 * capabilities. If autonegotiation is disabled, we use the
273 * appropriate bits in the control register.
274 *
275 * Stolen from Linux's mii.c and phy_device.c
276 */
Yegor Yefremove2043f52012-11-28 11:15:17 +0100277int genphy_parse_link(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -0500278{
279 int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
280
281 /* We're using autonegotiation */
David Dueck3a530d12013-11-05 17:23:02 +0100282 if (phydev->supported & SUPPORTED_Autoneg) {
Andy Fleming5f184712011-04-08 02:10:27 -0500283 u32 lpa = 0;
Heiko Schocherf6d1f6e2013-07-23 15:32:36 +0200284 int gblpa = 0;
Charles Coldwellde1d7862013-02-21 08:25:52 -0500285 u32 estatus = 0;
Andy Fleming5f184712011-04-08 02:10:27 -0500286
287 /* Check for gigabit capability */
David Dueck3a530d12013-11-05 17:23:02 +0100288 if (phydev->supported & (SUPPORTED_1000baseT_Full |
289 SUPPORTED_1000baseT_Half)) {
Andy Fleming5f184712011-04-08 02:10:27 -0500290 /* We want a list of states supported by
291 * both PHYs in the link
292 */
293 gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
Heiko Schocherf6d1f6e2013-07-23 15:32:36 +0200294 if (gblpa < 0) {
295 debug("Could not read MII_STAT1000. Ignoring gigabit capability\n");
296 gblpa = 0;
297 }
Andy Fleming5f184712011-04-08 02:10:27 -0500298 gblpa &= phy_read(phydev,
299 MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
300 }
301
302 /* Set the baseline so we only have to set them
303 * if they're different
304 */
305 phydev->speed = SPEED_10;
306 phydev->duplex = DUPLEX_HALF;
307
308 /* Check the gigabit fields */
309 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
310 phydev->speed = SPEED_1000;
311
312 if (gblpa & PHY_1000BTSR_1000FD)
313 phydev->duplex = DUPLEX_FULL;
314
315 /* We're done! */
316 return 0;
317 }
318
319 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
320 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
321
Wolfgang Denk0dcfb0f2011-09-28 21:02:43 +0200322 if (lpa & (LPA_100FULL | LPA_100HALF)) {
Andy Fleming5f184712011-04-08 02:10:27 -0500323 phydev->speed = SPEED_100;
324
Wolfgang Denk0dcfb0f2011-09-28 21:02:43 +0200325 if (lpa & LPA_100FULL)
326 phydev->duplex = DUPLEX_FULL;
327
328 } else if (lpa & LPA_10FULL)
Andy Fleming5f184712011-04-08 02:10:27 -0500329 phydev->duplex = DUPLEX_FULL;
Charles Coldwellde1d7862013-02-21 08:25:52 -0500330
Sascha Silbe9ba30f62013-07-19 12:25:10 +0200331 /*
332 * Extended status may indicate that the PHY supports
333 * 1000BASE-T/X even though the 1000BASE-T registers
334 * are missing. In this case we can't tell whether the
335 * peer also supports it, so we only check extended
336 * status if the 1000BASE-T registers are actually
337 * missing.
338 */
339 if ((mii_reg & BMSR_ESTATEN) && !(mii_reg & BMSR_ERCAP))
Charles Coldwellde1d7862013-02-21 08:25:52 -0500340 estatus = phy_read(phydev, MDIO_DEVAD_NONE,
341 MII_ESTATUS);
342
343 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_XHALF |
344 ESTATUS_1000_TFULL | ESTATUS_1000_THALF)) {
345 phydev->speed = SPEED_1000;
346 if (estatus & (ESTATUS_1000_XFULL | ESTATUS_1000_TFULL))
347 phydev->duplex = DUPLEX_FULL;
348 }
349
Andy Fleming5f184712011-04-08 02:10:27 -0500350 } else {
351 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
352
353 phydev->speed = SPEED_10;
354 phydev->duplex = DUPLEX_HALF;
355
356 if (bmcr & BMCR_FULLDPLX)
357 phydev->duplex = DUPLEX_FULL;
358
359 if (bmcr & BMCR_SPEED1000)
360 phydev->speed = SPEED_1000;
361 else if (bmcr & BMCR_SPEED100)
362 phydev->speed = SPEED_100;
363 }
364
365 return 0;
366}
367
368int genphy_config(struct phy_device *phydev)
369{
370 int val;
371 u32 features;
372
373 /* For now, I'll claim that the generic driver supports
374 * all possible port types */
375 features = (SUPPORTED_TP | SUPPORTED_MII
376 | SUPPORTED_AUI | SUPPORTED_FIBRE |
377 SUPPORTED_BNC);
378
379 /* Do we support autonegotiation? */
380 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
381
382 if (val < 0)
383 return val;
384
385 if (val & BMSR_ANEGCAPABLE)
386 features |= SUPPORTED_Autoneg;
387
388 if (val & BMSR_100FULL)
389 features |= SUPPORTED_100baseT_Full;
390 if (val & BMSR_100HALF)
391 features |= SUPPORTED_100baseT_Half;
392 if (val & BMSR_10FULL)
393 features |= SUPPORTED_10baseT_Full;
394 if (val & BMSR_10HALF)
395 features |= SUPPORTED_10baseT_Half;
396
397 if (val & BMSR_ESTATEN) {
398 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
399
400 if (val < 0)
401 return val;
402
403 if (val & ESTATUS_1000_TFULL)
404 features |= SUPPORTED_1000baseT_Full;
405 if (val & ESTATUS_1000_THALF)
406 features |= SUPPORTED_1000baseT_Half;
Charles Coldwellde1d7862013-02-21 08:25:52 -0500407 if (val & ESTATUS_1000_XFULL)
408 features |= SUPPORTED_1000baseX_Full;
409 if (val & ESTATUS_1000_XHALF)
Fabio Estevam9a5dad22013-07-19 10:01:34 -0300410 features |= SUPPORTED_1000baseX_Half;
Andy Fleming5f184712011-04-08 02:10:27 -0500411 }
412
413 phydev->supported = features;
414 phydev->advertising = features;
415
416 genphy_config_aneg(phydev);
417
418 return 0;
419}
420
421int genphy_startup(struct phy_device *phydev)
422{
423 genphy_update_link(phydev);
424 genphy_parse_link(phydev);
425
426 return 0;
427}
428
429int genphy_shutdown(struct phy_device *phydev)
430{
431 return 0;
432}
433
434static struct phy_driver genphy_driver = {
435 .uid = 0xffffffff,
436 .mask = 0xffffffff,
437 .name = "Generic PHY",
438 .features = 0,
439 .config = genphy_config,
440 .startup = genphy_startup,
441 .shutdown = genphy_shutdown,
442};
443
444static LIST_HEAD(phy_drivers);
445
446int phy_init(void)
447{
Shaohui Xief7c38cf2014-12-30 18:32:04 +0800448#ifdef CONFIG_PHY_AQUANTIA
449 phy_aquantia_init();
450#endif
Andy Fleming9082eea2011-04-07 21:56:05 -0500451#ifdef CONFIG_PHY_ATHEROS
452 phy_atheros_init();
453#endif
454#ifdef CONFIG_PHY_BROADCOM
455 phy_broadcom_init();
456#endif
Shengzhou Liu9b18e512014-11-10 18:32:29 +0800457#ifdef CONFIG_PHY_CORTINA
458 phy_cortina_init();
459#endif
Andy Fleming9082eea2011-04-07 21:56:05 -0500460#ifdef CONFIG_PHY_DAVICOM
461 phy_davicom_init();
462#endif
Matt Porterf485c8a2013-03-20 05:38:13 +0000463#ifdef CONFIG_PHY_ET1011C
464 phy_et1011c_init();
465#endif
Andy Fleming9082eea2011-04-07 21:56:05 -0500466#ifdef CONFIG_PHY_LXT
467 phy_lxt_init();
468#endif
469#ifdef CONFIG_PHY_MARVELL
470 phy_marvell_init();
471#endif
472#ifdef CONFIG_PHY_MICREL
473 phy_micrel_init();
474#endif
475#ifdef CONFIG_PHY_NATSEMI
476 phy_natsemi_init();
477#endif
478#ifdef CONFIG_PHY_REALTEK
479 phy_realtek_init();
480#endif
Nobuhiro Iwamatsu5751aa22011-11-23 21:24:15 +0000481#ifdef CONFIG_PHY_SMSC
482 phy_smsc_init();
483#endif
Andy Fleming9082eea2011-04-07 21:56:05 -0500484#ifdef CONFIG_PHY_TERANETICS
485 phy_teranetics_init();
486#endif
487#ifdef CONFIG_PHY_VITESSE
488 phy_vitesse_init();
489#endif
490
Andy Fleming5f184712011-04-08 02:10:27 -0500491 return 0;
492}
493
494int phy_register(struct phy_driver *drv)
495{
496 INIT_LIST_HEAD(&drv->list);
497 list_add_tail(&drv->list, &phy_drivers);
498
Michal Simekabbfcbe2015-05-13 13:40:40 +0200499#ifdef CONFIG_NEEDS_MANUAL_RELOC
500 if (drv->probe)
501 drv->probe += gd->reloc_off;
502 if (drv->config)
503 drv->config += gd->reloc_off;
504 if (drv->startup)
505 drv->startup += gd->reloc_off;
506 if (drv->shutdown)
507 drv->shutdown += gd->reloc_off;
508 if (drv->readext)
509 drv->readext += gd->reloc_off;
510 if (drv->writeext)
511 drv->writeext += gd->reloc_off;
512#endif
Andy Fleming5f184712011-04-08 02:10:27 -0500513 return 0;
514}
515
Kim Phillips960d70c2012-10-29 13:34:34 +0000516static int phy_probe(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -0500517{
518 int err = 0;
519
520 phydev->advertising = phydev->supported = phydev->drv->features;
521 phydev->mmds = phydev->drv->mmds;
522
523 if (phydev->drv->probe)
524 err = phydev->drv->probe(phydev);
525
526 return err;
527}
528
529static struct phy_driver *generic_for_interface(phy_interface_t interface)
530{
531#ifdef CONFIG_PHYLIB_10G
532 if (is_10g_interface(interface))
533 return &gen10g_driver;
534#endif
535
536 return &genphy_driver;
537}
538
Kim Phillips960d70c2012-10-29 13:34:34 +0000539static struct phy_driver *get_phy_driver(struct phy_device *phydev,
Andy Fleming5f184712011-04-08 02:10:27 -0500540 phy_interface_t interface)
541{
542 struct list_head *entry;
543 int phy_id = phydev->phy_id;
544 struct phy_driver *drv = NULL;
545
546 list_for_each(entry, &phy_drivers) {
547 drv = list_entry(entry, struct phy_driver, list);
548 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
549 return drv;
550 }
551
552 /* If we made it here, there's no driver for this PHY */
553 return generic_for_interface(interface);
554}
555
Kim Phillips960d70c2012-10-29 13:34:34 +0000556static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
557 int phy_id,
558 phy_interface_t interface)
Andy Fleming5f184712011-04-08 02:10:27 -0500559{
560 struct phy_device *dev;
561
562 /* We allocate the device, and initialize the
563 * default values */
564 dev = malloc(sizeof(*dev));
565 if (!dev) {
566 printf("Failed to allocate PHY device for %s:%d\n",
567 bus->name, addr);
568 return NULL;
569 }
570
571 memset(dev, 0, sizeof(*dev));
572
573 dev->duplex = -1;
574 dev->link = 1;
575 dev->interface = interface;
576
577 dev->autoneg = AUTONEG_ENABLE;
578
579 dev->addr = addr;
580 dev->phy_id = phy_id;
581 dev->bus = bus;
582
583 dev->drv = get_phy_driver(dev, interface);
584
585 phy_probe(dev);
586
587 bus->phymap[addr] = dev;
588
589 return dev;
590}
591
592/**
593 * get_phy_id - reads the specified addr for its ID.
594 * @bus: the target MII bus
595 * @addr: PHY address on the MII bus
596 * @phy_id: where to store the ID retrieved.
597 *
598 * Description: Reads the ID registers of the PHY at @addr on the
599 * @bus, stores it in @phy_id and returns zero on success.
600 */
Shengzhou Liu5707d5f2015-04-07 18:46:32 +0800601int __weak get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
Andy Fleming5f184712011-04-08 02:10:27 -0500602{
603 int phy_reg;
604
605 /* Grab the bits from PHYIR1, and put them
606 * in the upper half */
607 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
608
609 if (phy_reg < 0)
610 return -EIO;
611
612 *phy_id = (phy_reg & 0xffff) << 16;
613
614 /* Grab the bits from PHYIR2, and put them in the lower half */
615 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
616
617 if (phy_reg < 0)
618 return -EIO;
619
620 *phy_id |= (phy_reg & 0xffff);
621
622 return 0;
623}
624
Troy Kisky1adb4062012-10-22 16:40:43 +0000625static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
626 unsigned phy_mask, int devad, phy_interface_t interface)
627{
628 u32 phy_id = 0xffffffff;
629 while (phy_mask) {
630 int addr = ffs(phy_mask) - 1;
631 int r = get_phy_id(bus, addr, devad, &phy_id);
Troy Kisky1adb4062012-10-22 16:40:43 +0000632 /* If the PHY ID is mostly f's, we didn't find anything */
Cormier, Jonathan08be2832014-05-21 13:08:52 -0400633 if (r == 0 && (phy_id & 0x1fffffff) != 0x1fffffff)
Troy Kisky1adb4062012-10-22 16:40:43 +0000634 return phy_device_create(bus, addr, phy_id, interface);
635 phy_mask &= ~(1 << addr);
636 }
637 return NULL;
638}
639
640static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
641 unsigned phy_mask, phy_interface_t interface)
642{
643 /* If we have one, return the existing device, with new interface */
644 while (phy_mask) {
645 int addr = ffs(phy_mask) - 1;
646 if (bus->phymap[addr]) {
647 bus->phymap[addr]->interface = interface;
648 return bus->phymap[addr];
649 }
650 phy_mask &= ~(1 << addr);
651 }
652 return NULL;
653}
654
655static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
656 unsigned phy_mask, phy_interface_t interface)
657{
658 int i;
659 struct phy_device *phydev;
660
661 phydev = search_for_existing_phy(bus, phy_mask, interface);
662 if (phydev)
663 return phydev;
664 /* Try Standard (ie Clause 22) access */
665 /* Otherwise we have to try Clause 45 */
666 for (i = 0; i < 5; i++) {
667 phydev = create_phy_by_mask(bus, phy_mask,
668 i ? i : MDIO_DEVAD_NONE, interface);
669 if (IS_ERR(phydev))
670 return NULL;
671 if (phydev)
672 return phydev;
673 }
Khoronzhuk, Ivanadc9a792014-10-17 20:44:32 +0300674 printf("Phy %d not found\n", ffs(phy_mask) - 1);
Troy Kisky1adb4062012-10-22 16:40:43 +0000675 return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
676}
677
Andy Fleming5f184712011-04-08 02:10:27 -0500678/**
679 * get_phy_device - reads the specified PHY device and returns its @phy_device struct
680 * @bus: the target MII bus
681 * @addr: PHY address on the MII bus
682 *
683 * Description: Reads the ID registers of the PHY at @addr on the
684 * @bus, then allocates and returns the phy_device to represent it.
685 */
Kim Phillips960d70c2012-10-29 13:34:34 +0000686static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
687 phy_interface_t interface)
Andy Fleming5f184712011-04-08 02:10:27 -0500688{
Troy Kisky1adb4062012-10-22 16:40:43 +0000689 return get_phy_device_by_mask(bus, 1 << addr, interface);
Andy Fleming5f184712011-04-08 02:10:27 -0500690}
691
692int phy_reset(struct phy_device *phydev)
693{
694 int reg;
695 int timeout = 500;
696 int devad = MDIO_DEVAD_NONE;
697
698#ifdef CONFIG_PHYLIB_10G
699 /* If it's 10G, we need to issue reset through one of the MMDs */
700 if (is_10g_interface(phydev->interface)) {
701 if (!phydev->mmds)
702 gen10g_discover_mmds(phydev);
703
704 devad = ffs(phydev->mmds) - 1;
705 }
706#endif
707
708 reg = phy_read(phydev, devad, MII_BMCR);
709 if (reg < 0) {
710 debug("PHY status read failed\n");
711 return -1;
712 }
713
714 reg |= BMCR_RESET;
715
716 if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
717 debug("PHY reset failed\n");
718 return -1;
719 }
720
721#ifdef CONFIG_PHY_RESET_DELAY
722 udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
723#endif
724 /*
725 * Poll the control register for the reset bit to go to 0 (it is
726 * auto-clearing). This should happen within 0.5 seconds per the
727 * IEEE spec.
728 */
729 while ((reg & BMCR_RESET) && timeout--) {
730 reg = phy_read(phydev, devad, MII_BMCR);
731
732 if (reg < 0) {
733 debug("PHY status read failed\n");
734 return -1;
735 }
736 udelay(1000);
737 }
738
739 if (reg & BMCR_RESET) {
740 puts("PHY reset timed out\n");
741 return -1;
742 }
743
744 return 0;
745}
746
747int miiphy_reset(const char *devname, unsigned char addr)
748{
749 struct mii_dev *bus = miiphy_get_dev_by_name(devname);
750 struct phy_device *phydev;
751
752 /*
753 * miiphy_reset was only used on standard PHYs, so we'll fake it here.
754 * If later code tries to connect with the right interface, this will
755 * be corrected by get_phy_device in phy_connect()
756 */
757 phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
758
759 return phy_reset(phydev);
760}
761
Troy Kisky1adb4062012-10-22 16:40:43 +0000762struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
763 phy_interface_t interface)
Andy Fleming5f184712011-04-08 02:10:27 -0500764{
Andy Fleming5f184712011-04-08 02:10:27 -0500765 /* Reset the bus */
Vladimir Zapolskiye3a77212011-09-05 07:24:07 +0000766 if (bus->reset)
767 bus->reset(bus);
Andy Fleming5f184712011-04-08 02:10:27 -0500768
769 /* Wait 15ms to make sure the PHY has come out of hard reset */
770 udelay(15000);
Troy Kisky1adb4062012-10-22 16:40:43 +0000771 return get_phy_device_by_mask(bus, phy_mask, interface);
772}
Andy Fleming5f184712011-04-08 02:10:27 -0500773
Simon Glassc74c8e62015-04-05 16:07:39 -0600774#ifdef CONFIG_DM_ETH
775void phy_connect_dev(struct phy_device *phydev, struct udevice *dev)
776#else
Troy Kisky1adb4062012-10-22 16:40:43 +0000777void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
Simon Glassc74c8e62015-04-05 16:07:39 -0600778#endif
Troy Kisky1adb4062012-10-22 16:40:43 +0000779{
Andy Fleming5f184712011-04-08 02:10:27 -0500780 /* Soft Reset the PHY */
781 phy_reset(phydev);
Troy Kisky1adb4062012-10-22 16:40:43 +0000782 if (phydev->dev) {
Andy Fleming5f184712011-04-08 02:10:27 -0500783 printf("%s:%d is connected to %s. Reconnecting to %s\n",
Troy Kisky1adb4062012-10-22 16:40:43 +0000784 phydev->bus->name, phydev->addr,
785 phydev->dev->name, dev->name);
786 }
Andy Fleming5f184712011-04-08 02:10:27 -0500787 phydev->dev = dev;
Wolfgang Denkb91a9d92011-07-24 21:39:10 +0000788 debug("%s connected to %s\n", dev->name, phydev->drv->name);
Troy Kisky1adb4062012-10-22 16:40:43 +0000789}
Andy Fleming5f184712011-04-08 02:10:27 -0500790
Simon Glassc74c8e62015-04-05 16:07:39 -0600791#ifdef CONFIG_DM_ETH
792struct phy_device *phy_connect(struct mii_dev *bus, int addr,
793 struct udevice *dev, phy_interface_t interface)
794#else
Troy Kisky1adb4062012-10-22 16:40:43 +0000795struct phy_device *phy_connect(struct mii_dev *bus, int addr,
796 struct eth_device *dev, phy_interface_t interface)
Simon Glassc74c8e62015-04-05 16:07:39 -0600797#endif
Troy Kisky1adb4062012-10-22 16:40:43 +0000798{
799 struct phy_device *phydev;
800
801 phydev = phy_find_by_mask(bus, 1 << addr, interface);
802 if (phydev)
803 phy_connect_dev(phydev, dev);
804 else
805 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
Andy Fleming5f184712011-04-08 02:10:27 -0500806 return phydev;
807}
808
Timur Tabi6e5b9ac2012-07-05 10:33:18 +0000809/*
810 * Start the PHY. Returns 0 on success, or a negative error code.
811 */
Andy Fleming5f184712011-04-08 02:10:27 -0500812int phy_startup(struct phy_device *phydev)
813{
814 if (phydev->drv->startup)
Timur Tabi6e5b9ac2012-07-05 10:33:18 +0000815 return phydev->drv->startup(phydev);
Andy Fleming5f184712011-04-08 02:10:27 -0500816
817 return 0;
818}
819
Jeroen Hofstee3c6928f2014-10-08 22:57:26 +0200820__weak int board_phy_config(struct phy_device *phydev)
Andy Fleming5f184712011-04-08 02:10:27 -0500821{
Troy Kisky9fafe7d2012-02-07 14:08:49 +0000822 if (phydev->drv->config)
823 return phydev->drv->config(phydev);
Andy Fleming5f184712011-04-08 02:10:27 -0500824 return 0;
825}
826
Andy Fleming5f184712011-04-08 02:10:27 -0500827int phy_config(struct phy_device *phydev)
828{
Andy Fleming5f184712011-04-08 02:10:27 -0500829 /* Invoke an optional board-specific helper */
830 board_phy_config(phydev);
831
832 return 0;
833}
834
835int phy_shutdown(struct phy_device *phydev)
836{
837 if (phydev->drv->shutdown)
838 phydev->drv->shutdown(phydev);
839
840 return 0;
841}
Simon Glassc74c8e62015-04-05 16:07:39 -0600842
843int phy_get_interface_by_name(const char *str)
844{
845 int i;
846
847 for (i = 0; i < PHY_INTERFACE_MODE_COUNT; i++) {
848 if (!strcmp(str, phy_interface_strings[i]))
849 return i;
850 }
851
852 return -1;
853}