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14
15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17#include <linux/kernel.h>
18#include <linux/string.h>
19#include <linux/errno.h>
20#include <linux/unistd.h>
21#include <linux/slab.h>
22#include <linux/interrupt.h>
23#include <linux/init.h>
24#include <linux/delay.h>
25#include <linux/netdevice.h>
26#include <linux/etherdevice.h>
27#include <linux/skbuff.h>
28#include <linux/mm.h>
29#include <linux/module.h>
30#include <linux/mii.h>
31#include <linux/ethtool.h>
32#include <linux/phy.h>
33#include <linux/mdio.h>
34#include <linux/io.h>
35#include <linux/uaccess.h>
36#include <linux/of.h>
37
38#include <asm/irq.h>
39
40MODULE_DESCRIPTION("PHY library");
41MODULE_AUTHOR("Andy Fleming");
42MODULE_LICENSE("GPL");
43
44void phy_device_free(struct phy_device *phydev)
45{
46 put_device(&phydev->mdio.dev);
47}
48EXPORT_SYMBOL(phy_device_free);
49
50static void phy_mdio_device_free(struct mdio_device *mdiodev)
51{
52 struct phy_device *phydev;
53
54 phydev = container_of(mdiodev, struct phy_device, mdio);
55 phy_device_free(phydev);
56}
57
58static void phy_device_release(struct device *dev)
59{
60 kfree(to_phy_device(dev));
61}
62
63static void phy_mdio_device_remove(struct mdio_device *mdiodev)
64{
65 struct phy_device *phydev;
66
67 phydev = container_of(mdiodev, struct phy_device, mdio);
68 phy_device_remove(phydev);
69}
70
71enum genphy_driver {
72 GENPHY_DRV_1G,
73 GENPHY_DRV_10G,
74 GENPHY_DRV_MAX
75};
76
77static struct phy_driver genphy_driver[GENPHY_DRV_MAX];
78
79static LIST_HEAD(phy_fixup_list);
80static DEFINE_MUTEX(phy_fixup_lock);
81
82#ifdef CONFIG_PM
83static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
84{
85 struct device_driver *drv = phydev->mdio.dev.driver;
86 struct phy_driver *phydrv = to_phy_driver(drv);
87 struct net_device *netdev = phydev->attached_dev;
88
89 if (!drv || !phydrv->suspend)
90 return false;
91
92
93
94
95
96
97 if (!netdev)
98 return !phydev->suspended;
99
100
101
102
103 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
104 return false;
105
106
107
108
109
110 if (device_may_wakeup(&netdev->dev))
111 return false;
112
113 return true;
114}
115
116static int mdio_bus_phy_suspend(struct device *dev)
117{
118 struct phy_device *phydev = to_phy_device(dev);
119
120
121
122
123
124
125 if (phydev->attached_dev && phydev->adjust_link)
126 phy_stop_machine(phydev);
127
128 if (!mdio_bus_phy_may_suspend(phydev))
129 return 0;
130
131 return phy_suspend(phydev);
132}
133
134static int mdio_bus_phy_resume(struct device *dev)
135{
136 struct phy_device *phydev = to_phy_device(dev);
137 int ret;
138
139 if (!mdio_bus_phy_may_suspend(phydev))
140 goto no_resume;
141
142 ret = phy_resume(phydev);
143 if (ret < 0)
144 return ret;
145
146no_resume:
147 if (phydev->attached_dev && phydev->adjust_link)
148 phy_start_machine(phydev);
149
150 return 0;
151}
152
153static int mdio_bus_phy_restore(struct device *dev)
154{
155 struct phy_device *phydev = to_phy_device(dev);
156 struct net_device *netdev = phydev->attached_dev;
157 int ret;
158
159 if (!netdev)
160 return 0;
161
162 ret = phy_init_hw(phydev);
163 if (ret < 0)
164 return ret;
165
166
167 phydev->link = 0;
168 phydev->state = PHY_UP;
169
170 phy_start_machine(phydev);
171
172 return 0;
173}
174
175static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
176 .suspend = mdio_bus_phy_suspend,
177 .resume = mdio_bus_phy_resume,
178 .freeze = mdio_bus_phy_suspend,
179 .thaw = mdio_bus_phy_resume,
180 .restore = mdio_bus_phy_restore,
181};
182
183#define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
184
185#else
186
187#define MDIO_BUS_PHY_PM_OPS NULL
188
189#endif
190
191
192
193
194
195
196
197
198
199
200int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
201 int (*run)(struct phy_device *))
202{
203 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
204
205 if (!fixup)
206 return -ENOMEM;
207
208 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
209 fixup->phy_uid = phy_uid;
210 fixup->phy_uid_mask = phy_uid_mask;
211 fixup->run = run;
212
213 mutex_lock(&phy_fixup_lock);
214 list_add_tail(&fixup->list, &phy_fixup_list);
215 mutex_unlock(&phy_fixup_lock);
216
217 return 0;
218}
219EXPORT_SYMBOL(phy_register_fixup);
220
221
222int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
223 int (*run)(struct phy_device *))
224{
225 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
226}
227EXPORT_SYMBOL(phy_register_fixup_for_uid);
228
229
230int phy_register_fixup_for_id(const char *bus_id,
231 int (*run)(struct phy_device *))
232{
233 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
234}
235EXPORT_SYMBOL(phy_register_fixup_for_id);
236
237
238
239
240static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
241{
242 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
243 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
244 return 0;
245
246 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
247 (phydev->phy_id & fixup->phy_uid_mask))
248 if (fixup->phy_uid != PHY_ANY_UID)
249 return 0;
250
251 return 1;
252}
253
254
255static int phy_scan_fixups(struct phy_device *phydev)
256{
257 struct phy_fixup *fixup;
258
259 mutex_lock(&phy_fixup_lock);
260 list_for_each_entry(fixup, &phy_fixup_list, list) {
261 if (phy_needs_fixup(phydev, fixup)) {
262 int err = fixup->run(phydev);
263
264 if (err < 0) {
265 mutex_unlock(&phy_fixup_lock);
266 return err;
267 }
268 phydev->has_fixups = true;
269 }
270 }
271 mutex_unlock(&phy_fixup_lock);
272
273 return 0;
274}
275
276static int phy_bus_match(struct device *dev, struct device_driver *drv)
277{
278 struct phy_device *phydev = to_phy_device(dev);
279 struct phy_driver *phydrv = to_phy_driver(drv);
280 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
281 int i;
282
283 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
284 return 0;
285
286 if (phydrv->match_phy_device)
287 return phydrv->match_phy_device(phydev);
288
289 if (phydev->is_c45) {
290 for (i = 1; i < num_ids; i++) {
291 if (!(phydev->c45_ids.devices_in_package & (1 << i)))
292 continue;
293
294 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
295 (phydev->c45_ids.device_ids[i] &
296 phydrv->phy_id_mask))
297 return 1;
298 }
299 return 0;
300 } else {
301 return (phydrv->phy_id & phydrv->phy_id_mask) ==
302 (phydev->phy_id & phydrv->phy_id_mask);
303 }
304}
305
306struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
307 bool is_c45,
308 struct phy_c45_device_ids *c45_ids)
309{
310 struct phy_device *dev;
311 struct mdio_device *mdiodev;
312
313
314 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
315 if (!dev)
316 return ERR_PTR(-ENOMEM);
317
318 mdiodev = &dev->mdio;
319 mdiodev->dev.release = phy_device_release;
320 mdiodev->dev.parent = &bus->dev;
321 mdiodev->dev.bus = &mdio_bus_type;
322 mdiodev->bus = bus;
323 mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS;
324 mdiodev->bus_match = phy_bus_match;
325 mdiodev->addr = addr;
326 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
327 mdiodev->device_free = phy_mdio_device_free;
328 mdiodev->device_remove = phy_mdio_device_remove;
329
330 dev->speed = 0;
331 dev->duplex = -1;
332 dev->pause = 0;
333 dev->asym_pause = 0;
334 dev->link = 1;
335 dev->interface = PHY_INTERFACE_MODE_GMII;
336
337 dev->autoneg = AUTONEG_ENABLE;
338
339 dev->is_c45 = is_c45;
340 dev->phy_id = phy_id;
341 if (c45_ids)
342 dev->c45_ids = *c45_ids;
343 dev->irq = bus->irq[addr];
344 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
345
346 dev->state = PHY_DOWN;
347
348 mutex_init(&dev->lock);
349 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
350 INIT_WORK(&dev->phy_queue, phy_change);
351
352
353
354
355
356
357
358
359
360
361
362 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
363
364 device_initialize(&mdiodev->dev);
365
366 return dev;
367}
368EXPORT_SYMBOL(phy_device_create);
369
370
371
372
373
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377
378
379
380
381static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
382 u32 *devices_in_package)
383{
384 int phy_reg, reg_addr;
385
386 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
387 phy_reg = mdiobus_read(bus, addr, reg_addr);
388 if (phy_reg < 0)
389 return -EIO;
390 *devices_in_package = (phy_reg & 0xffff) << 16;
391
392 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
393 phy_reg = mdiobus_read(bus, addr, reg_addr);
394 if (phy_reg < 0)
395 return -EIO;
396 *devices_in_package |= (phy_reg & 0xffff);
397
398 return 0;
399}
400
401
402
403
404
405
406
407
408
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411
412
413
414static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
415 struct phy_c45_device_ids *c45_ids) {
416 int phy_reg;
417 int i, reg_addr;
418 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
419 u32 *devs = &c45_ids->devices_in_package;
420
421
422
423
424 for (i = 1; i < num_ids && *devs == 0; i++) {
425 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
426 if (phy_reg < 0)
427 return -EIO;
428
429 if ((*devs & 0x1fffffff) == 0x1fffffff) {
430
431
432
433
434
435 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
436 if (phy_reg < 0)
437 return -EIO;
438
439 if ((*devs & 0x1fffffff) == 0x1fffffff) {
440 *phy_id = 0xffffffff;
441 return 0;
442 } else {
443 break;
444 }
445 }
446 }
447
448
449 for (i = 1; i < num_ids; i++) {
450 if (!(c45_ids->devices_in_package & (1 << i)))
451 continue;
452
453 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
454 phy_reg = mdiobus_read(bus, addr, reg_addr);
455 if (phy_reg < 0)
456 return -EIO;
457 c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
458
459 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
460 phy_reg = mdiobus_read(bus, addr, reg_addr);
461 if (phy_reg < 0)
462 return -EIO;
463 c45_ids->device_ids[i] |= (phy_reg & 0xffff);
464 }
465 *phy_id = 0;
466 return 0;
467}
468
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483
484
485static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
486 bool is_c45, struct phy_c45_device_ids *c45_ids)
487{
488 int phy_reg;
489
490 if (is_c45)
491 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
492
493
494 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
495 if (phy_reg < 0)
496 return -EIO;
497
498 *phy_id = (phy_reg & 0xffff) << 16;
499
500
501 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
502 if (phy_reg < 0)
503 return -EIO;
504
505 *phy_id |= (phy_reg & 0xffff);
506
507 return 0;
508}
509
510
511
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515
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517
518
519
520struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
521{
522 struct phy_c45_device_ids c45_ids = {0};
523 u32 phy_id = 0;
524 int r;
525
526 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
527 if (r)
528 return ERR_PTR(r);
529
530
531 if ((phy_id & 0x1fffffff) == 0x1fffffff)
532 return ERR_PTR(-ENODEV);
533
534 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
535}
536EXPORT_SYMBOL(get_phy_device);
537
538static ssize_t
539phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
540{
541 struct phy_device *phydev = to_phy_device(dev);
542
543 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
544}
545static DEVICE_ATTR_RO(phy_id);
546
547static ssize_t
548phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
549{
550 struct phy_device *phydev = to_phy_device(dev);
551 const char *mode = NULL;
552
553 if (phy_is_internal(phydev))
554 mode = "internal";
555 else
556 mode = phy_modes(phydev->interface);
557
558 return sprintf(buf, "%s\n", mode);
559}
560static DEVICE_ATTR_RO(phy_interface);
561
562static ssize_t
563phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
564 char *buf)
565{
566 struct phy_device *phydev = to_phy_device(dev);
567
568 return sprintf(buf, "%d\n", phydev->has_fixups);
569}
570static DEVICE_ATTR_RO(phy_has_fixups);
571
572static struct attribute *phy_dev_attrs[] = {
573 &dev_attr_phy_id.attr,
574 &dev_attr_phy_interface.attr,
575 &dev_attr_phy_has_fixups.attr,
576 NULL,
577};
578ATTRIBUTE_GROUPS(phy_dev);
579
580
581
582
583
584int phy_device_register(struct phy_device *phydev)
585{
586 int err;
587
588 err = mdiobus_register_device(&phydev->mdio);
589 if (err)
590 return err;
591
592
593 err = phy_scan_fixups(phydev);
594 if (err) {
595 pr_err("PHY %d failed to initialize\n", phydev->mdio.addr);
596 goto out;
597 }
598
599 phydev->mdio.dev.groups = phy_dev_groups;
600
601 err = device_add(&phydev->mdio.dev);
602 if (err) {
603 pr_err("PHY %d failed to add\n", phydev->mdio.addr);
604 goto out;
605 }
606
607 return 0;
608
609 out:
610 mdiobus_unregister_device(&phydev->mdio);
611 return err;
612}
613EXPORT_SYMBOL(phy_device_register);
614
615
616
617
618
619
620
621
622
623void phy_device_remove(struct phy_device *phydev)
624{
625 device_del(&phydev->mdio.dev);
626 mdiobus_unregister_device(&phydev->mdio);
627}
628EXPORT_SYMBOL(phy_device_remove);
629
630
631
632
633
634struct phy_device *phy_find_first(struct mii_bus *bus)
635{
636 struct phy_device *phydev;
637 int addr;
638
639 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
640 phydev = mdiobus_get_phy(bus, addr);
641 if (phydev)
642 return phydev;
643 }
644 return NULL;
645}
646EXPORT_SYMBOL(phy_find_first);
647
648
649
650
651
652
653
654
655
656
657
658
659
660static void phy_prepare_link(struct phy_device *phydev,
661 void (*handler)(struct net_device *))
662{
663 phydev->adjust_link = handler;
664}
665
666
667
668
669
670
671
672
673int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
674 void (*handler)(struct net_device *),
675 phy_interface_t interface)
676{
677 int rc;
678
679 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
680 if (rc)
681 return rc;
682
683 phy_prepare_link(phydev, handler);
684 phy_start_machine(phydev);
685 if (phydev->irq > 0)
686 phy_start_interrupts(phydev);
687
688 return 0;
689}
690EXPORT_SYMBOL(phy_connect_direct);
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
708 void (*handler)(struct net_device *),
709 phy_interface_t interface)
710{
711 struct phy_device *phydev;
712 struct device *d;
713 int rc;
714
715
716
717
718 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
719 if (!d) {
720 pr_err("PHY %s not found\n", bus_id);
721 return ERR_PTR(-ENODEV);
722 }
723 phydev = to_phy_device(d);
724
725 rc = phy_connect_direct(dev, phydev, handler, interface);
726 if (rc)
727 return ERR_PTR(rc);
728
729 return phydev;
730}
731EXPORT_SYMBOL(phy_connect);
732
733
734
735
736
737
738void phy_disconnect(struct phy_device *phydev)
739{
740 if (phydev->irq > 0)
741 phy_stop_interrupts(phydev);
742
743 phy_stop_machine(phydev);
744
745 phydev->adjust_link = NULL;
746
747 phy_detach(phydev);
748}
749EXPORT_SYMBOL(phy_disconnect);
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769static int phy_poll_reset(struct phy_device *phydev)
770{
771
772 unsigned int retries = 12;
773 int ret;
774
775 do {
776 msleep(50);
777 ret = phy_read(phydev, MII_BMCR);
778 if (ret < 0)
779 return ret;
780 } while (ret & BMCR_RESET && --retries);
781 if (ret & BMCR_RESET)
782 return -ETIMEDOUT;
783
784
785
786
787 msleep(1);
788 return 0;
789}
790
791int phy_init_hw(struct phy_device *phydev)
792{
793 int ret = 0;
794
795 if (!phydev->drv || !phydev->drv->config_init)
796 return 0;
797
798 if (phydev->drv->soft_reset)
799 ret = phydev->drv->soft_reset(phydev);
800 else
801 ret = genphy_soft_reset(phydev);
802
803 if (ret < 0)
804 return ret;
805
806 ret = phy_scan_fixups(phydev);
807 if (ret < 0)
808 return ret;
809
810 return phydev->drv->config_init(phydev);
811}
812EXPORT_SYMBOL(phy_init_hw);
813
814void phy_attached_info(struct phy_device *phydev)
815{
816 phy_attached_print(phydev, NULL);
817}
818EXPORT_SYMBOL(phy_attached_info);
819
820#define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)"
821void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
822{
823 if (!fmt) {
824 dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n",
825 phydev->drv->name, phydev_name(phydev),
826 phydev->irq);
827 } else {
828 va_list ap;
829
830 dev_info(&phydev->mdio.dev, ATTACHED_FMT,
831 phydev->drv->name, phydev_name(phydev),
832 phydev->irq);
833
834 va_start(ap, fmt);
835 vprintk(fmt, ap);
836 va_end(ap);
837 }
838}
839EXPORT_SYMBOL(phy_attached_print);
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
857 u32 flags, phy_interface_t interface)
858{
859 struct mii_bus *bus = phydev->mdio.bus;
860 struct device *d = &phydev->mdio.dev;
861 int err;
862
863 if (!try_module_get(bus->owner)) {
864 dev_err(&dev->dev, "failed to get the bus module\n");
865 return -EIO;
866 }
867
868 get_device(d);
869
870
871
872
873 if (!d->driver) {
874 if (phydev->is_c45)
875 d->driver =
876 &genphy_driver[GENPHY_DRV_10G].mdiodrv.driver;
877 else
878 d->driver =
879 &genphy_driver[GENPHY_DRV_1G].mdiodrv.driver;
880
881 err = d->driver->probe(d);
882 if (err >= 0)
883 err = device_bind_driver(d);
884
885 if (err)
886 goto error;
887 }
888
889 if (phydev->attached_dev) {
890 dev_err(&dev->dev, "PHY already attached\n");
891 err = -EBUSY;
892 goto error;
893 }
894
895 phydev->attached_dev = dev;
896 dev->phydev = phydev;
897
898 phydev->dev_flags = flags;
899
900 phydev->interface = interface;
901
902 phydev->state = PHY_READY;
903
904
905
906
907 netif_carrier_off(phydev->attached_dev);
908
909
910
911
912
913 err = phy_init_hw(phydev);
914 if (err)
915 phy_detach(phydev);
916 else
917 phy_resume(phydev);
918
919 return err;
920
921error:
922 put_device(d);
923 module_put(bus->owner);
924 return err;
925}
926EXPORT_SYMBOL(phy_attach_direct);
927
928
929
930
931
932
933
934
935
936
937struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
938 phy_interface_t interface)
939{
940 struct bus_type *bus = &mdio_bus_type;
941 struct phy_device *phydev;
942 struct device *d;
943 int rc;
944
945
946
947
948 d = bus_find_device_by_name(bus, NULL, bus_id);
949 if (!d) {
950 pr_err("PHY %s not found\n", bus_id);
951 return ERR_PTR(-ENODEV);
952 }
953 phydev = to_phy_device(d);
954
955 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
956 if (rc)
957 return ERR_PTR(rc);
958
959 return phydev;
960}
961EXPORT_SYMBOL(phy_attach);
962
963
964
965
966
967
968
969
970void phy_detach(struct phy_device *phydev)
971{
972 struct mii_bus *bus;
973 int i;
974
975 phydev->attached_dev->phydev = NULL;
976 phydev->attached_dev = NULL;
977 phy_suspend(phydev);
978
979
980
981
982
983
984 for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) {
985 if (phydev->mdio.dev.driver ==
986 &genphy_driver[i].mdiodrv.driver) {
987 device_release_driver(&phydev->mdio.dev);
988 break;
989 }
990 }
991
992
993
994
995
996 bus = phydev->mdio.bus;
997
998 put_device(&phydev->mdio.dev);
999 module_put(bus->owner);
1000}
1001EXPORT_SYMBOL(phy_detach);
1002
1003int phy_suspend(struct phy_device *phydev)
1004{
1005 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1006 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1007 int ret = 0;
1008
1009
1010 phy_ethtool_get_wol(phydev, &wol);
1011 if (wol.wolopts)
1012 return -EBUSY;
1013
1014 if (phydrv->suspend)
1015 ret = phydrv->suspend(phydev);
1016
1017 if (ret)
1018 return ret;
1019
1020 phydev->suspended = true;
1021
1022 return ret;
1023}
1024EXPORT_SYMBOL(phy_suspend);
1025
1026int phy_resume(struct phy_device *phydev)
1027{
1028 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1029 int ret = 0;
1030
1031 if (phydrv->resume)
1032 ret = phydrv->resume(phydev);
1033
1034 if (ret)
1035 return ret;
1036
1037 phydev->suspended = false;
1038
1039 return ret;
1040}
1041EXPORT_SYMBOL(phy_resume);
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054static int genphy_config_advert(struct phy_device *phydev)
1055{
1056 u32 advertise;
1057 int oldadv, adv, bmsr;
1058 int err, changed = 0;
1059
1060
1061 phydev->advertising &= phydev->supported;
1062 advertise = phydev->advertising;
1063
1064
1065 adv = phy_read(phydev, MII_ADVERTISE);
1066 if (adv < 0)
1067 return adv;
1068
1069 oldadv = adv;
1070 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
1071 ADVERTISE_PAUSE_ASYM);
1072 adv |= ethtool_adv_to_mii_adv_t(advertise);
1073
1074 if (adv != oldadv) {
1075 err = phy_write(phydev, MII_ADVERTISE, adv);
1076
1077 if (err < 0)
1078 return err;
1079 changed = 1;
1080 }
1081
1082 bmsr = phy_read(phydev, MII_BMSR);
1083 if (bmsr < 0)
1084 return bmsr;
1085
1086
1087
1088
1089
1090 if (!(bmsr & BMSR_ESTATEN))
1091 return changed;
1092
1093
1094 adv = phy_read(phydev, MII_CTRL1000);
1095 if (adv < 0)
1096 return adv;
1097
1098 oldadv = adv;
1099 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
1100
1101 if (phydev->supported & (SUPPORTED_1000baseT_Half |
1102 SUPPORTED_1000baseT_Full)) {
1103 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
1104 }
1105
1106 if (adv != oldadv)
1107 changed = 1;
1108
1109 err = phy_write(phydev, MII_CTRL1000, adv);
1110 if (err < 0)
1111 return err;
1112
1113 return changed;
1114}
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124int genphy_setup_forced(struct phy_device *phydev)
1125{
1126 int ctl = phy_read(phydev, MII_BMCR);
1127
1128 ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN;
1129 phydev->pause = 0;
1130 phydev->asym_pause = 0;
1131
1132 if (SPEED_1000 == phydev->speed)
1133 ctl |= BMCR_SPEED1000;
1134 else if (SPEED_100 == phydev->speed)
1135 ctl |= BMCR_SPEED100;
1136
1137 if (DUPLEX_FULL == phydev->duplex)
1138 ctl |= BMCR_FULLDPLX;
1139
1140 return phy_write(phydev, MII_BMCR, ctl);
1141}
1142EXPORT_SYMBOL(genphy_setup_forced);
1143
1144
1145
1146
1147
1148int genphy_restart_aneg(struct phy_device *phydev)
1149{
1150 int ctl = phy_read(phydev, MII_BMCR);
1151
1152 if (ctl < 0)
1153 return ctl;
1154
1155 ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
1156
1157
1158 ctl &= ~BMCR_ISOLATE;
1159
1160 return phy_write(phydev, MII_BMCR, ctl);
1161}
1162EXPORT_SYMBOL(genphy_restart_aneg);
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172int genphy_config_aneg(struct phy_device *phydev)
1173{
1174 int result;
1175
1176 if (AUTONEG_ENABLE != phydev->autoneg)
1177 return genphy_setup_forced(phydev);
1178
1179 result = genphy_config_advert(phydev);
1180 if (result < 0)
1181 return result;
1182 if (result == 0) {
1183
1184
1185
1186 int ctl = phy_read(phydev, MII_BMCR);
1187
1188 if (ctl < 0)
1189 return ctl;
1190
1191 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1192 result = 1;
1193 }
1194
1195
1196
1197
1198 if (result > 0)
1199 result = genphy_restart_aneg(phydev);
1200
1201 return result;
1202}
1203EXPORT_SYMBOL(genphy_config_aneg);
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213int genphy_aneg_done(struct phy_device *phydev)
1214{
1215 int retval = phy_read(phydev, MII_BMSR);
1216
1217 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1218}
1219EXPORT_SYMBOL(genphy_aneg_done);
1220
1221static int gen10g_config_aneg(struct phy_device *phydev)
1222{
1223 return 0;
1224}
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234int genphy_update_link(struct phy_device *phydev)
1235{
1236 int status;
1237
1238
1239 status = phy_read(phydev, MII_BMSR);
1240 if (status < 0)
1241 return status;
1242
1243
1244 status = phy_read(phydev, MII_BMSR);
1245 if (status < 0)
1246 return status;
1247
1248 if ((status & BMSR_LSTATUS) == 0)
1249 phydev->link = 0;
1250 else
1251 phydev->link = 1;
1252
1253 return 0;
1254}
1255EXPORT_SYMBOL(genphy_update_link);
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266int genphy_read_status(struct phy_device *phydev)
1267{
1268 int adv;
1269 int err;
1270 int lpa;
1271 int lpagb = 0;
1272 int common_adv;
1273 int common_adv_gb = 0;
1274
1275
1276 err = genphy_update_link(phydev);
1277 if (err)
1278 return err;
1279
1280 phydev->lp_advertising = 0;
1281
1282 if (AUTONEG_ENABLE == phydev->autoneg) {
1283 if (phydev->supported & (SUPPORTED_1000baseT_Half
1284 | SUPPORTED_1000baseT_Full)) {
1285 lpagb = phy_read(phydev, MII_STAT1000);
1286 if (lpagb < 0)
1287 return lpagb;
1288
1289 adv = phy_read(phydev, MII_CTRL1000);
1290 if (adv < 0)
1291 return adv;
1292
1293 phydev->lp_advertising =
1294 mii_stat1000_to_ethtool_lpa_t(lpagb);
1295 common_adv_gb = lpagb & adv << 2;
1296 }
1297
1298 lpa = phy_read(phydev, MII_LPA);
1299 if (lpa < 0)
1300 return lpa;
1301
1302 phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
1303
1304 adv = phy_read(phydev, MII_ADVERTISE);
1305 if (adv < 0)
1306 return adv;
1307
1308 common_adv = lpa & adv;
1309
1310 phydev->speed = SPEED_10;
1311 phydev->duplex = DUPLEX_HALF;
1312 phydev->pause = 0;
1313 phydev->asym_pause = 0;
1314
1315 if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) {
1316 phydev->speed = SPEED_1000;
1317
1318 if (common_adv_gb & LPA_1000FULL)
1319 phydev->duplex = DUPLEX_FULL;
1320 } else if (common_adv & (LPA_100FULL | LPA_100HALF)) {
1321 phydev->speed = SPEED_100;
1322
1323 if (common_adv & LPA_100FULL)
1324 phydev->duplex = DUPLEX_FULL;
1325 } else
1326 if (common_adv & LPA_10FULL)
1327 phydev->duplex = DUPLEX_FULL;
1328
1329 if (phydev->duplex == DUPLEX_FULL) {
1330 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
1331 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
1332 }
1333 } else {
1334 int bmcr = phy_read(phydev, MII_BMCR);
1335
1336 if (bmcr < 0)
1337 return bmcr;
1338
1339 if (bmcr & BMCR_FULLDPLX)
1340 phydev->duplex = DUPLEX_FULL;
1341 else
1342 phydev->duplex = DUPLEX_HALF;
1343
1344 if (bmcr & BMCR_SPEED1000)
1345 phydev->speed = SPEED_1000;
1346 else if (bmcr & BMCR_SPEED100)
1347 phydev->speed = SPEED_100;
1348 else
1349 phydev->speed = SPEED_10;
1350
1351 phydev->pause = 0;
1352 phydev->asym_pause = 0;
1353 }
1354
1355 return 0;
1356}
1357EXPORT_SYMBOL(genphy_read_status);
1358
1359static int gen10g_read_status(struct phy_device *phydev)
1360{
1361 int devad, reg;
1362 u32 mmd_mask = phydev->c45_ids.devices_in_package;
1363
1364 phydev->link = 1;
1365
1366
1367 phydev->speed = SPEED_10000;
1368 phydev->duplex = DUPLEX_FULL;
1369
1370 for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) {
1371 if (!(mmd_mask & 1))
1372 continue;
1373
1374
1375
1376
1377 phy_read_mmd(phydev, devad, MDIO_STAT1);
1378 reg = phy_read_mmd(phydev, devad, MDIO_STAT1);
1379 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
1380 phydev->link = 0;
1381 }
1382
1383 return 0;
1384}
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395int genphy_soft_reset(struct phy_device *phydev)
1396{
1397 int ret;
1398
1399 ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
1400 if (ret < 0)
1401 return ret;
1402
1403 return phy_poll_reset(phydev);
1404}
1405EXPORT_SYMBOL(genphy_soft_reset);
1406
1407int genphy_config_init(struct phy_device *phydev)
1408{
1409 int val;
1410 u32 features;
1411
1412 features = (SUPPORTED_TP | SUPPORTED_MII
1413 | SUPPORTED_AUI | SUPPORTED_FIBRE |
1414 SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1415
1416
1417 val = phy_read(phydev, MII_BMSR);
1418 if (val < 0)
1419 return val;
1420
1421 if (val & BMSR_ANEGCAPABLE)
1422 features |= SUPPORTED_Autoneg;
1423
1424 if (val & BMSR_100FULL)
1425 features |= SUPPORTED_100baseT_Full;
1426 if (val & BMSR_100HALF)
1427 features |= SUPPORTED_100baseT_Half;
1428 if (val & BMSR_10FULL)
1429 features |= SUPPORTED_10baseT_Full;
1430 if (val & BMSR_10HALF)
1431 features |= SUPPORTED_10baseT_Half;
1432
1433 if (val & BMSR_ESTATEN) {
1434 val = phy_read(phydev, MII_ESTATUS);
1435 if (val < 0)
1436 return val;
1437
1438 if (val & ESTATUS_1000_TFULL)
1439 features |= SUPPORTED_1000baseT_Full;
1440 if (val & ESTATUS_1000_THALF)
1441 features |= SUPPORTED_1000baseT_Half;
1442 }
1443
1444 phydev->supported &= features;
1445 phydev->advertising &= features;
1446
1447 return 0;
1448}
1449
1450static int gen10g_soft_reset(struct phy_device *phydev)
1451{
1452
1453 return 0;
1454}
1455EXPORT_SYMBOL(genphy_config_init);
1456
1457static int gen10g_config_init(struct phy_device *phydev)
1458{
1459
1460 phydev->supported = SUPPORTED_10000baseT_Full;
1461 phydev->advertising = SUPPORTED_10000baseT_Full;
1462
1463 return 0;
1464}
1465
1466int genphy_suspend(struct phy_device *phydev)
1467{
1468 int value;
1469
1470 mutex_lock(&phydev->lock);
1471
1472 value = phy_read(phydev, MII_BMCR);
1473 phy_write(phydev, MII_BMCR, value | BMCR_PDOWN);
1474
1475 mutex_unlock(&phydev->lock);
1476
1477 return 0;
1478}
1479EXPORT_SYMBOL(genphy_suspend);
1480
1481static int gen10g_suspend(struct phy_device *phydev)
1482{
1483 return 0;
1484}
1485
1486int genphy_resume(struct phy_device *phydev)
1487{
1488 int value;
1489
1490 mutex_lock(&phydev->lock);
1491
1492 value = phy_read(phydev, MII_BMCR);
1493 phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN);
1494
1495 mutex_unlock(&phydev->lock);
1496
1497 return 0;
1498}
1499EXPORT_SYMBOL(genphy_resume);
1500
1501static int gen10g_resume(struct phy_device *phydev)
1502{
1503 return 0;
1504}
1505
1506static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
1507{
1508
1509
1510
1511
1512 phydev->supported &= PHY_DEFAULT_FEATURES;
1513
1514 switch (max_speed) {
1515 default:
1516 return -ENOTSUPP;
1517 case SPEED_1000:
1518 phydev->supported |= PHY_1000BT_FEATURES;
1519
1520 case SPEED_100:
1521 phydev->supported |= PHY_100BT_FEATURES;
1522
1523 case SPEED_10:
1524 phydev->supported |= PHY_10BT_FEATURES;
1525 }
1526
1527 return 0;
1528}
1529
1530int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
1531{
1532 int err;
1533
1534 err = __set_phy_supported(phydev, max_speed);
1535 if (err)
1536 return err;
1537
1538 phydev->advertising = phydev->supported;
1539
1540 return 0;
1541}
1542EXPORT_SYMBOL(phy_set_max_speed);
1543
1544static void of_set_phy_supported(struct phy_device *phydev)
1545{
1546 struct device_node *node = phydev->mdio.dev.of_node;
1547 u32 max_speed;
1548
1549 if (!IS_ENABLED(CONFIG_OF_MDIO))
1550 return;
1551
1552 if (!node)
1553 return;
1554
1555 if (!of_property_read_u32(node, "max-speed", &max_speed))
1556 __set_phy_supported(phydev, max_speed);
1557}
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567static int phy_probe(struct device *dev)
1568{
1569 struct phy_device *phydev = to_phy_device(dev);
1570 struct device_driver *drv = phydev->mdio.dev.driver;
1571 struct phy_driver *phydrv = to_phy_driver(drv);
1572 int err = 0;
1573
1574 phydev->drv = phydrv;
1575
1576
1577
1578
1579 if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
1580 phy_interrupt_is_valid(phydev))
1581 phydev->irq = PHY_POLL;
1582
1583 if (phydrv->flags & PHY_IS_INTERNAL)
1584 phydev->is_internal = true;
1585
1586 mutex_lock(&phydev->lock);
1587
1588
1589
1590
1591
1592 phydev->supported = phydrv->features;
1593 of_set_phy_supported(phydev);
1594 phydev->advertising = phydev->supported;
1595
1596
1597 phydev->state = PHY_READY;
1598
1599 if (phydev->drv->probe)
1600 err = phydev->drv->probe(phydev);
1601
1602 mutex_unlock(&phydev->lock);
1603
1604 return err;
1605}
1606
1607static int phy_remove(struct device *dev)
1608{
1609 struct phy_device *phydev = to_phy_device(dev);
1610
1611 mutex_lock(&phydev->lock);
1612 phydev->state = PHY_DOWN;
1613 mutex_unlock(&phydev->lock);
1614
1615 if (phydev->drv->remove)
1616 phydev->drv->remove(phydev);
1617 phydev->drv = NULL;
1618
1619 return 0;
1620}
1621
1622
1623
1624
1625
1626
1627int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
1628{
1629 int retval;
1630
1631 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
1632 new_driver->mdiodrv.driver.name = new_driver->name;
1633 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
1634 new_driver->mdiodrv.driver.probe = phy_probe;
1635 new_driver->mdiodrv.driver.remove = phy_remove;
1636 new_driver->mdiodrv.driver.owner = owner;
1637
1638 retval = driver_register(&new_driver->mdiodrv.driver);
1639 if (retval) {
1640 pr_err("%s: Error %d in registering driver\n",
1641 new_driver->name, retval);
1642
1643 return retval;
1644 }
1645
1646 pr_debug("%s: Registered new driver\n", new_driver->name);
1647
1648 return 0;
1649}
1650EXPORT_SYMBOL(phy_driver_register);
1651
1652int phy_drivers_register(struct phy_driver *new_driver, int n,
1653 struct module *owner)
1654{
1655 int i, ret = 0;
1656
1657 for (i = 0; i < n; i++) {
1658 ret = phy_driver_register(new_driver + i, owner);
1659 if (ret) {
1660 while (i-- > 0)
1661 phy_driver_unregister(new_driver + i);
1662 break;
1663 }
1664 }
1665 return ret;
1666}
1667EXPORT_SYMBOL(phy_drivers_register);
1668
1669void phy_driver_unregister(struct phy_driver *drv)
1670{
1671 driver_unregister(&drv->mdiodrv.driver);
1672}
1673EXPORT_SYMBOL(phy_driver_unregister);
1674
1675void phy_drivers_unregister(struct phy_driver *drv, int n)
1676{
1677 int i;
1678
1679 for (i = 0; i < n; i++)
1680 phy_driver_unregister(drv + i);
1681}
1682EXPORT_SYMBOL(phy_drivers_unregister);
1683
1684static struct phy_driver genphy_driver[] = {
1685{
1686 .phy_id = 0xffffffff,
1687 .phy_id_mask = 0xffffffff,
1688 .name = "Generic PHY",
1689 .soft_reset = genphy_soft_reset,
1690 .config_init = genphy_config_init,
1691 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
1692 SUPPORTED_AUI | SUPPORTED_FIBRE |
1693 SUPPORTED_BNC,
1694 .config_aneg = genphy_config_aneg,
1695 .aneg_done = genphy_aneg_done,
1696 .read_status = genphy_read_status,
1697 .suspend = genphy_suspend,
1698 .resume = genphy_resume,
1699}, {
1700 .phy_id = 0xffffffff,
1701 .phy_id_mask = 0xffffffff,
1702 .name = "Generic 10G PHY",
1703 .soft_reset = gen10g_soft_reset,
1704 .config_init = gen10g_config_init,
1705 .features = 0,
1706 .config_aneg = gen10g_config_aneg,
1707 .read_status = gen10g_read_status,
1708 .suspend = gen10g_suspend,
1709 .resume = gen10g_resume,
1710} };
1711
1712static int __init phy_init(void)
1713{
1714 int rc;
1715
1716 rc = mdio_bus_init();
1717 if (rc)
1718 return rc;
1719
1720 rc = phy_drivers_register(genphy_driver,
1721 ARRAY_SIZE(genphy_driver), THIS_MODULE);
1722 if (rc)
1723 mdio_bus_exit();
1724
1725 return rc;
1726}
1727
1728static void __exit phy_exit(void)
1729{
1730 phy_drivers_unregister(genphy_driver,
1731 ARRAY_SIZE(genphy_driver));
1732 mdio_bus_exit();
1733}
1734
1735subsys_initcall(phy_init);
1736module_exit(phy_exit);
1737