Loading...
1// SPDX-License-Identifier: GPL-2.0+
2/* Framework for finding and configuring PHYs.
3 * Also contains generic PHY driver
4 *
5 * Author: Andy Fleming
6 *
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/acpi.h>
13#include <linux/bitmap.h>
14#include <linux/delay.h>
15#include <linux/errno.h>
16#include <linux/etherdevice.h>
17#include <linux/ethtool.h>
18#include <linux/init.h>
19#include <linux/interrupt.h>
20#include <linux/io.h>
21#include <linux/kernel.h>
22#include <linux/list.h>
23#include <linux/mdio.h>
24#include <linux/mii.h>
25#include <linux/mm.h>
26#include <linux/module.h>
27#include <linux/of.h>
28#include <linux/netdevice.h>
29#include <linux/phy.h>
30#include <linux/phylib_stubs.h>
31#include <linux/phy_led_triggers.h>
32#include <linux/phy_link_topology.h>
33#include <linux/pse-pd/pse.h>
34#include <linux/property.h>
35#include <linux/rtnetlink.h>
36#include <linux/sfp.h>
37#include <linux/skbuff.h>
38#include <linux/slab.h>
39#include <linux/string.h>
40#include <linux/uaccess.h>
41#include <linux/unistd.h>
42
43MODULE_DESCRIPTION("PHY library");
44MODULE_AUTHOR("Andy Fleming");
45MODULE_LICENSE("GPL");
46
47__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
48EXPORT_SYMBOL_GPL(phy_basic_features);
49
50__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
51EXPORT_SYMBOL_GPL(phy_basic_t1_features);
52
53__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1s_p2mp_features) __ro_after_init;
54EXPORT_SYMBOL_GPL(phy_basic_t1s_p2mp_features);
55
56__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
57EXPORT_SYMBOL_GPL(phy_gbit_features);
58
59__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
60EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
61
62__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
63EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
64
65__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
66EXPORT_SYMBOL_GPL(phy_10gbit_features);
67
68__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
69EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
70
71const int phy_basic_ports_array[3] = {
72 ETHTOOL_LINK_MODE_Autoneg_BIT,
73 ETHTOOL_LINK_MODE_TP_BIT,
74 ETHTOOL_LINK_MODE_MII_BIT,
75};
76EXPORT_SYMBOL_GPL(phy_basic_ports_array);
77
78const int phy_fibre_port_array[1] = {
79 ETHTOOL_LINK_MODE_FIBRE_BIT,
80};
81EXPORT_SYMBOL_GPL(phy_fibre_port_array);
82
83const int phy_all_ports_features_array[7] = {
84 ETHTOOL_LINK_MODE_Autoneg_BIT,
85 ETHTOOL_LINK_MODE_TP_BIT,
86 ETHTOOL_LINK_MODE_MII_BIT,
87 ETHTOOL_LINK_MODE_FIBRE_BIT,
88 ETHTOOL_LINK_MODE_AUI_BIT,
89 ETHTOOL_LINK_MODE_BNC_BIT,
90 ETHTOOL_LINK_MODE_Backplane_BIT,
91};
92EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
93
94const int phy_10_100_features_array[4] = {
95 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
96 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
97 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
98 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
99};
100EXPORT_SYMBOL_GPL(phy_10_100_features_array);
101
102const int phy_basic_t1_features_array[3] = {
103 ETHTOOL_LINK_MODE_TP_BIT,
104 ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
105 ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
106};
107EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
108
109const int phy_basic_t1s_p2mp_features_array[2] = {
110 ETHTOOL_LINK_MODE_TP_BIT,
111 ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
112};
113EXPORT_SYMBOL_GPL(phy_basic_t1s_p2mp_features_array);
114
115const int phy_gbit_features_array[2] = {
116 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
117 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
118};
119EXPORT_SYMBOL_GPL(phy_gbit_features_array);
120
121const int phy_10gbit_features_array[1] = {
122 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
123};
124EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
125
126static const int phy_10gbit_fec_features_array[1] = {
127 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
128};
129
130__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
131EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
132
133static const int phy_10gbit_full_features_array[] = {
134 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
135 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
136 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
137 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
138};
139
140static const int phy_eee_cap1_features_array[] = {
141 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
142 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
143 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
144 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
145 ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
146 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
147};
148
149__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_eee_cap1_features) __ro_after_init;
150EXPORT_SYMBOL_GPL(phy_eee_cap1_features);
151
152static const int phy_eee_cap2_features_array[] = {
153 ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
154 ETHTOOL_LINK_MODE_5000baseT_Full_BIT,
155};
156
157__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_eee_cap2_features) __ro_after_init;
158EXPORT_SYMBOL_GPL(phy_eee_cap2_features);
159
160static void features_init(void)
161{
162 /* 10/100 half/full*/
163 linkmode_set_bit_array(phy_basic_ports_array,
164 ARRAY_SIZE(phy_basic_ports_array),
165 phy_basic_features);
166 linkmode_set_bit_array(phy_10_100_features_array,
167 ARRAY_SIZE(phy_10_100_features_array),
168 phy_basic_features);
169
170 /* 100 full, TP */
171 linkmode_set_bit_array(phy_basic_t1_features_array,
172 ARRAY_SIZE(phy_basic_t1_features_array),
173 phy_basic_t1_features);
174
175 /* 10 half, P2MP, TP */
176 linkmode_set_bit_array(phy_basic_t1s_p2mp_features_array,
177 ARRAY_SIZE(phy_basic_t1s_p2mp_features_array),
178 phy_basic_t1s_p2mp_features);
179
180 /* 10/100 half/full + 1000 half/full */
181 linkmode_set_bit_array(phy_basic_ports_array,
182 ARRAY_SIZE(phy_basic_ports_array),
183 phy_gbit_features);
184 linkmode_set_bit_array(phy_10_100_features_array,
185 ARRAY_SIZE(phy_10_100_features_array),
186 phy_gbit_features);
187 linkmode_set_bit_array(phy_gbit_features_array,
188 ARRAY_SIZE(phy_gbit_features_array),
189 phy_gbit_features);
190
191 /* 10/100 half/full + 1000 half/full + fibre*/
192 linkmode_set_bit_array(phy_basic_ports_array,
193 ARRAY_SIZE(phy_basic_ports_array),
194 phy_gbit_fibre_features);
195 linkmode_set_bit_array(phy_10_100_features_array,
196 ARRAY_SIZE(phy_10_100_features_array),
197 phy_gbit_fibre_features);
198 linkmode_set_bit_array(phy_gbit_features_array,
199 ARRAY_SIZE(phy_gbit_features_array),
200 phy_gbit_fibre_features);
201 linkmode_set_bit_array(phy_fibre_port_array,
202 ARRAY_SIZE(phy_fibre_port_array),
203 phy_gbit_fibre_features);
204
205 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
206 linkmode_set_bit_array(phy_all_ports_features_array,
207 ARRAY_SIZE(phy_all_ports_features_array),
208 phy_gbit_all_ports_features);
209 linkmode_set_bit_array(phy_10_100_features_array,
210 ARRAY_SIZE(phy_10_100_features_array),
211 phy_gbit_all_ports_features);
212 linkmode_set_bit_array(phy_gbit_features_array,
213 ARRAY_SIZE(phy_gbit_features_array),
214 phy_gbit_all_ports_features);
215
216 /* 10/100 half/full + 1000 half/full + 10G full*/
217 linkmode_set_bit_array(phy_all_ports_features_array,
218 ARRAY_SIZE(phy_all_ports_features_array),
219 phy_10gbit_features);
220 linkmode_set_bit_array(phy_10_100_features_array,
221 ARRAY_SIZE(phy_10_100_features_array),
222 phy_10gbit_features);
223 linkmode_set_bit_array(phy_gbit_features_array,
224 ARRAY_SIZE(phy_gbit_features_array),
225 phy_10gbit_features);
226 linkmode_set_bit_array(phy_10gbit_features_array,
227 ARRAY_SIZE(phy_10gbit_features_array),
228 phy_10gbit_features);
229
230 /* 10/100/1000/10G full */
231 linkmode_set_bit_array(phy_all_ports_features_array,
232 ARRAY_SIZE(phy_all_ports_features_array),
233 phy_10gbit_full_features);
234 linkmode_set_bit_array(phy_10gbit_full_features_array,
235 ARRAY_SIZE(phy_10gbit_full_features_array),
236 phy_10gbit_full_features);
237 /* 10G FEC only */
238 linkmode_set_bit_array(phy_10gbit_fec_features_array,
239 ARRAY_SIZE(phy_10gbit_fec_features_array),
240 phy_10gbit_fec_features);
241 linkmode_set_bit_array(phy_eee_cap1_features_array,
242 ARRAY_SIZE(phy_eee_cap1_features_array),
243 phy_eee_cap1_features);
244 linkmode_set_bit_array(phy_eee_cap2_features_array,
245 ARRAY_SIZE(phy_eee_cap2_features_array),
246 phy_eee_cap2_features);
247
248}
249
250void phy_device_free(struct phy_device *phydev)
251{
252 put_device(&phydev->mdio.dev);
253}
254EXPORT_SYMBOL(phy_device_free);
255
256static void phy_mdio_device_free(struct mdio_device *mdiodev)
257{
258 struct phy_device *phydev;
259
260 phydev = container_of(mdiodev, struct phy_device, mdio);
261 phy_device_free(phydev);
262}
263
264static void phy_device_release(struct device *dev)
265{
266 fwnode_handle_put(dev->fwnode);
267 kfree(to_phy_device(dev));
268}
269
270static void phy_mdio_device_remove(struct mdio_device *mdiodev)
271{
272 struct phy_device *phydev;
273
274 phydev = container_of(mdiodev, struct phy_device, mdio);
275 phy_device_remove(phydev);
276}
277
278static struct phy_driver genphy_driver;
279
280static LIST_HEAD(phy_fixup_list);
281static DEFINE_MUTEX(phy_fixup_lock);
282
283static bool phy_drv_wol_enabled(struct phy_device *phydev)
284{
285 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
286
287 phy_ethtool_get_wol(phydev, &wol);
288
289 return wol.wolopts != 0;
290}
291
292static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
293{
294 struct device_driver *drv = phydev->mdio.dev.driver;
295 struct phy_driver *phydrv = to_phy_driver(drv);
296 struct net_device *netdev = phydev->attached_dev;
297
298 if (!drv || !phydrv->suspend)
299 return false;
300
301 /* If the PHY on the mido bus is not attached but has WOL enabled
302 * we cannot suspend the PHY.
303 */
304 if (!netdev && phy_drv_wol_enabled(phydev))
305 return false;
306
307 /* PHY not attached? May suspend if the PHY has not already been
308 * suspended as part of a prior call to phy_disconnect() ->
309 * phy_detach() -> phy_suspend() because the parent netdev might be the
310 * MDIO bus driver and clock gated at this point.
311 */
312 if (!netdev)
313 goto out;
314
315 if (netdev->ethtool->wol_enabled)
316 return false;
317
318 /* As long as not all affected network drivers support the
319 * wol_enabled flag, let's check for hints that WoL is enabled.
320 * Don't suspend PHY if the attached netdev parent may wake up.
321 * The parent may point to a PCI device, as in tg3 driver.
322 */
323 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
324 return false;
325
326 /* Also don't suspend PHY if the netdev itself may wakeup. This
327 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
328 * e.g. SoC devices.
329 */
330 if (device_may_wakeup(&netdev->dev))
331 return false;
332
333out:
334 return !phydev->suspended;
335}
336
337static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
338{
339 struct phy_device *phydev = to_phy_device(dev);
340
341 if (phydev->mac_managed_pm)
342 return 0;
343
344 /* Wakeup interrupts may occur during the system sleep transition when
345 * the PHY is inaccessible. Set flag to postpone handling until the PHY
346 * has resumed. Wait for concurrent interrupt handler to complete.
347 */
348 if (phy_interrupt_is_valid(phydev)) {
349 phydev->irq_suspended = 1;
350 synchronize_irq(phydev->irq);
351 }
352
353 /* We must stop the state machine manually, otherwise it stops out of
354 * control, possibly with the phydev->lock held. Upon resume, netdev
355 * may call phy routines that try to grab the same lock, and that may
356 * lead to a deadlock.
357 */
358 if (phydev->attached_dev && phydev->adjust_link)
359 phy_stop_machine(phydev);
360
361 if (!mdio_bus_phy_may_suspend(phydev))
362 return 0;
363
364 phydev->suspended_by_mdio_bus = 1;
365
366 return phy_suspend(phydev);
367}
368
369static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
370{
371 struct phy_device *phydev = to_phy_device(dev);
372 int ret;
373
374 if (phydev->mac_managed_pm)
375 return 0;
376
377 if (!phydev->suspended_by_mdio_bus)
378 goto no_resume;
379
380 phydev->suspended_by_mdio_bus = 0;
381
382 /* If we managed to get here with the PHY state machine in a state
383 * neither PHY_HALTED, PHY_READY nor PHY_UP, this is an indication
384 * that something went wrong and we should most likely be using
385 * MAC managed PM, but we are not.
386 */
387 WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY &&
388 phydev->state != PHY_UP);
389
390 ret = phy_init_hw(phydev);
391 if (ret < 0)
392 return ret;
393
394 ret = phy_resume(phydev);
395 if (ret < 0)
396 return ret;
397no_resume:
398 if (phy_interrupt_is_valid(phydev)) {
399 phydev->irq_suspended = 0;
400 synchronize_irq(phydev->irq);
401
402 /* Rerun interrupts which were postponed by phy_interrupt()
403 * because they occurred during the system sleep transition.
404 */
405 if (phydev->irq_rerun) {
406 phydev->irq_rerun = 0;
407 enable_irq(phydev->irq);
408 irq_wake_thread(phydev->irq, phydev);
409 }
410 }
411
412 if (phydev->attached_dev && phydev->adjust_link)
413 phy_start_machine(phydev);
414
415 return 0;
416}
417
418static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend,
419 mdio_bus_phy_resume);
420
421/**
422 * phy_register_fixup - creates a new phy_fixup and adds it to the list
423 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
424 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
425 * It can also be PHY_ANY_UID
426 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
427 * comparison
428 * @run: The actual code to be run when a matching PHY is found
429 */
430int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
431 int (*run)(struct phy_device *))
432{
433 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
434
435 if (!fixup)
436 return -ENOMEM;
437
438 strscpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
439 fixup->phy_uid = phy_uid;
440 fixup->phy_uid_mask = phy_uid_mask;
441 fixup->run = run;
442
443 mutex_lock(&phy_fixup_lock);
444 list_add_tail(&fixup->list, &phy_fixup_list);
445 mutex_unlock(&phy_fixup_lock);
446
447 return 0;
448}
449EXPORT_SYMBOL(phy_register_fixup);
450
451/* Registers a fixup to be run on any PHY with the UID in phy_uid */
452int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
453 int (*run)(struct phy_device *))
454{
455 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
456}
457EXPORT_SYMBOL(phy_register_fixup_for_uid);
458
459/* Registers a fixup to be run on the PHY with id string bus_id */
460int phy_register_fixup_for_id(const char *bus_id,
461 int (*run)(struct phy_device *))
462{
463 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
464}
465EXPORT_SYMBOL(phy_register_fixup_for_id);
466
467/**
468 * phy_unregister_fixup - remove a phy_fixup from the list
469 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
470 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
471 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
472 */
473int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
474{
475 struct list_head *pos, *n;
476 struct phy_fixup *fixup;
477 int ret;
478
479 ret = -ENODEV;
480
481 mutex_lock(&phy_fixup_lock);
482 list_for_each_safe(pos, n, &phy_fixup_list) {
483 fixup = list_entry(pos, struct phy_fixup, list);
484
485 if ((!strcmp(fixup->bus_id, bus_id)) &&
486 phy_id_compare(fixup->phy_uid, phy_uid, phy_uid_mask)) {
487 list_del(&fixup->list);
488 kfree(fixup);
489 ret = 0;
490 break;
491 }
492 }
493 mutex_unlock(&phy_fixup_lock);
494
495 return ret;
496}
497EXPORT_SYMBOL(phy_unregister_fixup);
498
499/* Unregisters a fixup of any PHY with the UID in phy_uid */
500int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
501{
502 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
503}
504EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
505
506/* Unregisters a fixup of the PHY with id string bus_id */
507int phy_unregister_fixup_for_id(const char *bus_id)
508{
509 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
510}
511EXPORT_SYMBOL(phy_unregister_fixup_for_id);
512
513/* Returns 1 if fixup matches phydev in bus_id and phy_uid.
514 * Fixups can be set to match any in one or more fields.
515 */
516static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
517{
518 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
519 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
520 return 0;
521
522 if (!phy_id_compare(phydev->phy_id, fixup->phy_uid,
523 fixup->phy_uid_mask))
524 if (fixup->phy_uid != PHY_ANY_UID)
525 return 0;
526
527 return 1;
528}
529
530/* Runs any matching fixups for this phydev */
531static int phy_scan_fixups(struct phy_device *phydev)
532{
533 struct phy_fixup *fixup;
534
535 mutex_lock(&phy_fixup_lock);
536 list_for_each_entry(fixup, &phy_fixup_list, list) {
537 if (phy_needs_fixup(phydev, fixup)) {
538 int err = fixup->run(phydev);
539
540 if (err < 0) {
541 mutex_unlock(&phy_fixup_lock);
542 return err;
543 }
544 phydev->has_fixups = true;
545 }
546 }
547 mutex_unlock(&phy_fixup_lock);
548
549 return 0;
550}
551
552static int phy_bus_match(struct device *dev, const struct device_driver *drv)
553{
554 struct phy_device *phydev = to_phy_device(dev);
555 const struct phy_driver *phydrv = to_phy_driver(drv);
556 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
557 int i;
558
559 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
560 return 0;
561
562 if (phydrv->match_phy_device)
563 return phydrv->match_phy_device(phydev);
564
565 if (phydev->is_c45) {
566 for (i = 1; i < num_ids; i++) {
567 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
568 continue;
569
570 if (phy_id_compare(phydev->c45_ids.device_ids[i],
571 phydrv->phy_id, phydrv->phy_id_mask))
572 return 1;
573 }
574 return 0;
575 } else {
576 return phy_id_compare(phydev->phy_id, phydrv->phy_id,
577 phydrv->phy_id_mask);
578 }
579}
580
581static ssize_t
582phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
583{
584 struct phy_device *phydev = to_phy_device(dev);
585
586 return sysfs_emit(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
587}
588static DEVICE_ATTR_RO(phy_id);
589
590static ssize_t
591phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
592{
593 struct phy_device *phydev = to_phy_device(dev);
594 const char *mode = NULL;
595
596 if (phy_is_internal(phydev))
597 mode = "internal";
598 else
599 mode = phy_modes(phydev->interface);
600
601 return sysfs_emit(buf, "%s\n", mode);
602}
603static DEVICE_ATTR_RO(phy_interface);
604
605static ssize_t
606phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
607 char *buf)
608{
609 struct phy_device *phydev = to_phy_device(dev);
610
611 return sysfs_emit(buf, "%d\n", phydev->has_fixups);
612}
613static DEVICE_ATTR_RO(phy_has_fixups);
614
615static ssize_t phy_dev_flags_show(struct device *dev,
616 struct device_attribute *attr,
617 char *buf)
618{
619 struct phy_device *phydev = to_phy_device(dev);
620
621 return sysfs_emit(buf, "0x%08x\n", phydev->dev_flags);
622}
623static DEVICE_ATTR_RO(phy_dev_flags);
624
625static struct attribute *phy_dev_attrs[] = {
626 &dev_attr_phy_id.attr,
627 &dev_attr_phy_interface.attr,
628 &dev_attr_phy_has_fixups.attr,
629 &dev_attr_phy_dev_flags.attr,
630 NULL,
631};
632ATTRIBUTE_GROUPS(phy_dev);
633
634static const struct device_type mdio_bus_phy_type = {
635 .name = "PHY",
636 .groups = phy_dev_groups,
637 .release = phy_device_release,
638 .pm = pm_ptr(&mdio_bus_phy_pm_ops),
639};
640
641static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
642{
643 int ret;
644
645 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
646 MDIO_ID_ARGS(phy_id));
647 /* We only check for failures in executing the usermode binary,
648 * not whether a PHY driver module exists for the PHY ID.
649 * Accept -ENOENT because this may occur in case no initramfs exists,
650 * then modprobe isn't available.
651 */
652 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
653 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
654 ret, (unsigned long)phy_id);
655 return ret;
656 }
657
658 return 0;
659}
660
661struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
662 bool is_c45,
663 struct phy_c45_device_ids *c45_ids)
664{
665 struct phy_device *dev;
666 struct mdio_device *mdiodev;
667 int ret = 0;
668
669 /* We allocate the device, and initialize the default values */
670 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
671 if (!dev)
672 return ERR_PTR(-ENOMEM);
673
674 mdiodev = &dev->mdio;
675 mdiodev->dev.parent = &bus->dev;
676 mdiodev->dev.bus = &mdio_bus_type;
677 mdiodev->dev.type = &mdio_bus_phy_type;
678 mdiodev->bus = bus;
679 mdiodev->bus_match = phy_bus_match;
680 mdiodev->addr = addr;
681 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
682 mdiodev->device_free = phy_mdio_device_free;
683 mdiodev->device_remove = phy_mdio_device_remove;
684 mdiodev->reset_state = -1;
685
686 dev->speed = SPEED_UNKNOWN;
687 dev->duplex = DUPLEX_UNKNOWN;
688 dev->pause = 0;
689 dev->asym_pause = 0;
690 dev->link = 0;
691 dev->port = PORT_TP;
692 dev->interface = PHY_INTERFACE_MODE_GMII;
693
694 dev->autoneg = AUTONEG_ENABLE;
695
696 dev->pma_extable = -ENODATA;
697 dev->is_c45 = is_c45;
698 dev->phy_id = phy_id;
699 if (c45_ids)
700 dev->c45_ids = *c45_ids;
701 dev->irq = bus->irq[addr];
702
703 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
704 device_initialize(&mdiodev->dev);
705
706 dev->state = PHY_DOWN;
707 INIT_LIST_HEAD(&dev->leds);
708
709 mutex_init(&dev->lock);
710 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
711
712 /* Request the appropriate module unconditionally; don't
713 * bother trying to do so only if it isn't already loaded,
714 * because that gets complicated. A hotplug event would have
715 * done an unconditional modprobe anyway.
716 * We don't do normal hotplug because it won't work for MDIO
717 * -- because it relies on the device staying around for long
718 * enough for the driver to get loaded. With MDIO, the NIC
719 * driver will get bored and give up as soon as it finds that
720 * there's no driver _already_ loaded.
721 */
722 if (is_c45 && c45_ids) {
723 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
724 int i;
725
726 for (i = 1; i < num_ids; i++) {
727 if (c45_ids->device_ids[i] == 0xffffffff)
728 continue;
729
730 ret = phy_request_driver_module(dev,
731 c45_ids->device_ids[i]);
732 if (ret)
733 break;
734 }
735 } else {
736 ret = phy_request_driver_module(dev, phy_id);
737 }
738
739 if (ret) {
740 put_device(&mdiodev->dev);
741 dev = ERR_PTR(ret);
742 }
743
744 return dev;
745}
746EXPORT_SYMBOL(phy_device_create);
747
748/* phy_c45_probe_present - checks to see if a MMD is present in the package
749 * @bus: the target MII bus
750 * @prtad: PHY package address on the MII bus
751 * @devad: PHY device (MMD) address
752 *
753 * Read the MDIO_STAT2 register, and check whether a device is responding
754 * at this address.
755 *
756 * Returns: negative error number on bus access error, zero if no device
757 * is responding, or positive if a device is present.
758 */
759static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad)
760{
761 int stat2;
762
763 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2);
764 if (stat2 < 0)
765 return stat2;
766
767 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL;
768}
769
770/* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
771 * @bus: the target MII bus
772 * @addr: PHY address on the MII bus
773 * @dev_addr: MMD address in the PHY.
774 * @devices_in_package: where to store the devices in package information.
775 *
776 * Description: reads devices in package registers of a MMD at @dev_addr
777 * from PHY at @addr on @bus.
778 *
779 * Returns: 0 on success, -EIO on failure.
780 */
781static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
782 u32 *devices_in_package)
783{
784 int phy_reg;
785
786 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2);
787 if (phy_reg < 0)
788 return -EIO;
789 *devices_in_package = phy_reg << 16;
790
791 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1);
792 if (phy_reg < 0)
793 return -EIO;
794 *devices_in_package |= phy_reg;
795
796 return 0;
797}
798
799/**
800 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
801 * @bus: the target MII bus
802 * @addr: PHY address on the MII bus
803 * @c45_ids: where to store the c45 ID information.
804 *
805 * Read the PHY "devices in package". If this appears to be valid, read
806 * the PHY identifiers for each device. Return the "devices in package"
807 * and identifiers in @c45_ids.
808 *
809 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
810 * the "devices in package" is invalid or no device responds.
811 */
812static int get_phy_c45_ids(struct mii_bus *bus, int addr,
813 struct phy_c45_device_ids *c45_ids)
814{
815 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
816 u32 devs_in_pkg = 0;
817 int i, ret, phy_reg;
818
819 /* Find first non-zero Devices In package. Device zero is reserved
820 * for 802.3 c45 complied PHYs, so don't probe it at first.
821 */
822 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 ||
823 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) {
824 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
825 /* Check that there is a device present at this
826 * address before reading the devices-in-package
827 * register to avoid reading garbage from the PHY.
828 * Some PHYs (88x3310) vendor space is not IEEE802.3
829 * compliant.
830 */
831 ret = phy_c45_probe_present(bus, addr, i);
832 if (ret < 0)
833 /* returning -ENODEV doesn't stop bus
834 * scanning
835 */
836 return (phy_reg == -EIO ||
837 phy_reg == -ENODEV) ? -ENODEV : -EIO;
838
839 if (!ret)
840 continue;
841 }
842 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg);
843 if (phy_reg < 0)
844 return -EIO;
845 }
846
847 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) {
848 /* If mostly Fs, there is no device there, then let's probe
849 * MMD 0, as some 10G PHYs have zero Devices In package,
850 * e.g. Cortina CS4315/CS4340 PHY.
851 */
852 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg);
853 if (phy_reg < 0)
854 return -EIO;
855
856 /* no device there, let's get out of here */
857 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff)
858 return -ENODEV;
859 }
860
861 /* Now probe Device Identifiers for each device present. */
862 for (i = 1; i < num_ids; i++) {
863 if (!(devs_in_pkg & (1 << i)))
864 continue;
865
866 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
867 /* Probe the "Device Present" bits for the vendor MMDs
868 * to ignore these if they do not contain IEEE 802.3
869 * registers.
870 */
871 ret = phy_c45_probe_present(bus, addr, i);
872 if (ret < 0)
873 return ret;
874
875 if (!ret)
876 continue;
877 }
878
879 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1);
880 if (phy_reg < 0)
881 return -EIO;
882 c45_ids->device_ids[i] = phy_reg << 16;
883
884 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2);
885 if (phy_reg < 0)
886 return -EIO;
887 c45_ids->device_ids[i] |= phy_reg;
888 }
889
890 c45_ids->devices_in_package = devs_in_pkg;
891 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
892 c45_ids->mmds_present = devs_in_pkg & ~BIT(0);
893
894 return 0;
895}
896
897/**
898 * get_phy_c22_id - reads the specified addr for its clause 22 ID.
899 * @bus: the target MII bus
900 * @addr: PHY address on the MII bus
901 * @phy_id: where to store the ID retrieved.
902 *
903 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus,
904 * placing it in @phy_id. Return zero on successful read and the ID is
905 * valid, %-EIO on bus access error, or %-ENODEV if no device responds
906 * or invalid ID.
907 */
908static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
909{
910 int phy_reg;
911
912 /* Grab the bits from PHYIR1, and put them in the upper half */
913 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
914 if (phy_reg < 0) {
915 /* returning -ENODEV doesn't stop bus scanning */
916 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
917 }
918
919 *phy_id = phy_reg << 16;
920
921 /* Grab the bits from PHYIR2, and put them in the lower half */
922 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
923 if (phy_reg < 0) {
924 /* returning -ENODEV doesn't stop bus scanning */
925 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
926 }
927
928 *phy_id |= phy_reg;
929
930 /* If the phy_id is mostly Fs, there is no device there */
931 if ((*phy_id & 0x1fffffff) == 0x1fffffff)
932 return -ENODEV;
933
934 return 0;
935}
936
937/* Extract the phy ID from the compatible string of the form
938 * ethernet-phy-idAAAA.BBBB.
939 */
940int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
941{
942 unsigned int upper, lower;
943 const char *cp;
944 int ret;
945
946 ret = fwnode_property_read_string(fwnode, "compatible", &cp);
947 if (ret)
948 return ret;
949
950 if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
951 return -EINVAL;
952
953 *phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
954 return 0;
955}
956EXPORT_SYMBOL(fwnode_get_phy_id);
957
958/**
959 * get_phy_device - reads the specified PHY device and returns its @phy_device
960 * struct
961 * @bus: the target MII bus
962 * @addr: PHY address on the MII bus
963 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
964 *
965 * Probe for a PHY at @addr on @bus.
966 *
967 * When probing for a clause 22 PHY, then read the ID registers. If we find
968 * a valid ID, allocate and return a &struct phy_device.
969 *
970 * When probing for a clause 45 PHY, read the "devices in package" registers.
971 * If the "devices in package" appears valid, read the ID registers for each
972 * MMD, allocate and return a &struct phy_device.
973 *
974 * Returns an allocated &struct phy_device on success, %-ENODEV if there is
975 * no PHY present, or %-EIO on bus access error.
976 */
977struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
978{
979 struct phy_c45_device_ids c45_ids;
980 u32 phy_id = 0;
981 int r;
982
983 c45_ids.devices_in_package = 0;
984 c45_ids.mmds_present = 0;
985 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
986
987 if (is_c45)
988 r = get_phy_c45_ids(bus, addr, &c45_ids);
989 else
990 r = get_phy_c22_id(bus, addr, &phy_id);
991
992 if (r)
993 return ERR_PTR(r);
994
995 /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID
996 * of 0 when probed using get_phy_c22_id() with no error. Proceed to
997 * probe with C45 to see if we're able to get a valid PHY ID in the C45
998 * space, if successful, create the C45 PHY device.
999 */
1000 if (!is_c45 && phy_id == 0 && bus->read_c45) {
1001 r = get_phy_c45_ids(bus, addr, &c45_ids);
1002 if (!r)
1003 return phy_device_create(bus, addr, phy_id,
1004 true, &c45_ids);
1005 }
1006
1007 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
1008}
1009EXPORT_SYMBOL(get_phy_device);
1010
1011/**
1012 * phy_device_register - Register the phy device on the MDIO bus
1013 * @phydev: phy_device structure to be added to the MDIO bus
1014 */
1015int phy_device_register(struct phy_device *phydev)
1016{
1017 int err;
1018
1019 err = mdiobus_register_device(&phydev->mdio);
1020 if (err)
1021 return err;
1022
1023 /* Deassert the reset signal */
1024 phy_device_reset(phydev, 0);
1025
1026 /* Run all of the fixups for this PHY */
1027 err = phy_scan_fixups(phydev);
1028 if (err) {
1029 phydev_err(phydev, "failed to initialize\n");
1030 goto out;
1031 }
1032
1033 err = device_add(&phydev->mdio.dev);
1034 if (err) {
1035 phydev_err(phydev, "failed to add\n");
1036 goto out;
1037 }
1038
1039 return 0;
1040
1041 out:
1042 /* Assert the reset signal */
1043 phy_device_reset(phydev, 1);
1044
1045 mdiobus_unregister_device(&phydev->mdio);
1046 return err;
1047}
1048EXPORT_SYMBOL(phy_device_register);
1049
1050/**
1051 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
1052 * @phydev: phy_device structure to remove
1053 *
1054 * This doesn't free the phy_device itself, it merely reverses the effects
1055 * of phy_device_register(). Use phy_device_free() to free the device
1056 * after calling this function.
1057 */
1058void phy_device_remove(struct phy_device *phydev)
1059{
1060 unregister_mii_timestamper(phydev->mii_ts);
1061 pse_control_put(phydev->psec);
1062
1063 device_del(&phydev->mdio.dev);
1064
1065 /* Assert the reset signal */
1066 phy_device_reset(phydev, 1);
1067
1068 mdiobus_unregister_device(&phydev->mdio);
1069}
1070EXPORT_SYMBOL(phy_device_remove);
1071
1072/**
1073 * phy_get_c45_ids - Read 802.3-c45 IDs for phy device.
1074 * @phydev: phy_device structure to read 802.3-c45 IDs
1075 *
1076 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
1077 * the "devices in package" is invalid.
1078 */
1079int phy_get_c45_ids(struct phy_device *phydev)
1080{
1081 return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
1082 &phydev->c45_ids);
1083}
1084EXPORT_SYMBOL(phy_get_c45_ids);
1085
1086/**
1087 * phy_find_first - finds the first PHY device on the bus
1088 * @bus: the target MII bus
1089 */
1090struct phy_device *phy_find_first(struct mii_bus *bus)
1091{
1092 struct phy_device *phydev;
1093 int addr;
1094
1095 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
1096 phydev = mdiobus_get_phy(bus, addr);
1097 if (phydev)
1098 return phydev;
1099 }
1100 return NULL;
1101}
1102EXPORT_SYMBOL(phy_find_first);
1103
1104static void phy_link_change(struct phy_device *phydev, bool up)
1105{
1106 struct net_device *netdev = phydev->attached_dev;
1107
1108 if (up)
1109 netif_carrier_on(netdev);
1110 else
1111 netif_carrier_off(netdev);
1112 phydev->adjust_link(netdev);
1113 if (phydev->mii_ts && phydev->mii_ts->link_state)
1114 phydev->mii_ts->link_state(phydev->mii_ts, phydev);
1115}
1116
1117/**
1118 * phy_prepare_link - prepares the PHY layer to monitor link status
1119 * @phydev: target phy_device struct
1120 * @handler: callback function for link status change notifications
1121 *
1122 * Description: Tells the PHY infrastructure to handle the
1123 * gory details on monitoring link status (whether through
1124 * polling or an interrupt), and to call back to the
1125 * connected device driver when the link status changes.
1126 * If you want to monitor your own link state, don't call
1127 * this function.
1128 */
1129static void phy_prepare_link(struct phy_device *phydev,
1130 void (*handler)(struct net_device *))
1131{
1132 phydev->adjust_link = handler;
1133}
1134
1135/**
1136 * phy_connect_direct - connect an ethernet device to a specific phy_device
1137 * @dev: the network device to connect
1138 * @phydev: the pointer to the phy device
1139 * @handler: callback function for state change notifications
1140 * @interface: PHY device's interface
1141 */
1142int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
1143 void (*handler)(struct net_device *),
1144 phy_interface_t interface)
1145{
1146 int rc;
1147
1148 if (!dev)
1149 return -EINVAL;
1150
1151 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1152 if (rc)
1153 return rc;
1154
1155 phy_prepare_link(phydev, handler);
1156 if (phy_interrupt_is_valid(phydev))
1157 phy_request_interrupt(phydev);
1158
1159 return 0;
1160}
1161EXPORT_SYMBOL(phy_connect_direct);
1162
1163/**
1164 * phy_connect - connect an ethernet device to a PHY device
1165 * @dev: the network device to connect
1166 * @bus_id: the id string of the PHY device to connect
1167 * @handler: callback function for state change notifications
1168 * @interface: PHY device's interface
1169 *
1170 * Description: Convenience function for connecting ethernet
1171 * devices to PHY devices. The default behavior is for
1172 * the PHY infrastructure to handle everything, and only notify
1173 * the connected driver when the link status changes. If you
1174 * don't want, or can't use the provided functionality, you may
1175 * choose to call only the subset of functions which provide
1176 * the desired functionality.
1177 */
1178struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
1179 void (*handler)(struct net_device *),
1180 phy_interface_t interface)
1181{
1182 struct phy_device *phydev;
1183 struct device *d;
1184 int rc;
1185
1186 /* Search the list of PHY devices on the mdio bus for the
1187 * PHY with the requested name
1188 */
1189 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1190 if (!d) {
1191 pr_err("PHY %s not found\n", bus_id);
1192 return ERR_PTR(-ENODEV);
1193 }
1194 phydev = to_phy_device(d);
1195
1196 rc = phy_connect_direct(dev, phydev, handler, interface);
1197 put_device(d);
1198 if (rc)
1199 return ERR_PTR(rc);
1200
1201 return phydev;
1202}
1203EXPORT_SYMBOL(phy_connect);
1204
1205/**
1206 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1207 * device
1208 * @phydev: target phy_device struct
1209 */
1210void phy_disconnect(struct phy_device *phydev)
1211{
1212 if (phy_is_started(phydev))
1213 phy_stop(phydev);
1214
1215 if (phy_interrupt_is_valid(phydev))
1216 phy_free_interrupt(phydev);
1217
1218 phydev->adjust_link = NULL;
1219
1220 phy_detach(phydev);
1221}
1222EXPORT_SYMBOL(phy_disconnect);
1223
1224/**
1225 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1226 * @phydev: The PHY device to poll
1227 *
1228 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1229 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1230 * register must be polled until the BMCR_RESET bit clears.
1231 *
1232 * Furthermore, any attempts to write to PHY registers may have no effect
1233 * or even generate MDIO bus errors until this is complete.
1234 *
1235 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1236 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1237 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1238 * effort to support such broken PHYs, this function is separate from the
1239 * standard phy_init_hw() which will zero all the other bits in the BMCR
1240 * and reapply all driver-specific and board-specific fixups.
1241 */
1242static int phy_poll_reset(struct phy_device *phydev)
1243{
1244 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1245 int ret, val;
1246
1247 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
1248 50000, 600000, true);
1249 if (ret)
1250 return ret;
1251 /* Some chips (smsc911x) may still need up to another 1ms after the
1252 * BMCR_RESET bit is cleared before they are usable.
1253 */
1254 msleep(1);
1255 return 0;
1256}
1257
1258int phy_init_hw(struct phy_device *phydev)
1259{
1260 int ret = 0;
1261
1262 /* Deassert the reset signal */
1263 phy_device_reset(phydev, 0);
1264
1265 if (!phydev->drv)
1266 return 0;
1267
1268 if (phydev->drv->soft_reset) {
1269 ret = phydev->drv->soft_reset(phydev);
1270 if (ret < 0)
1271 return ret;
1272
1273 /* see comment in genphy_soft_reset for an explanation */
1274 phydev->suspended = 0;
1275 }
1276
1277 ret = phy_scan_fixups(phydev);
1278 if (ret < 0)
1279 return ret;
1280
1281 phy_interface_zero(phydev->possible_interfaces);
1282
1283 if (phydev->drv->config_init) {
1284 ret = phydev->drv->config_init(phydev);
1285 if (ret < 0)
1286 return ret;
1287 }
1288
1289 if (phydev->drv->config_intr) {
1290 ret = phydev->drv->config_intr(phydev);
1291 if (ret < 0)
1292 return ret;
1293 }
1294
1295 return 0;
1296}
1297EXPORT_SYMBOL(phy_init_hw);
1298
1299void phy_attached_info(struct phy_device *phydev)
1300{
1301 phy_attached_print(phydev, NULL);
1302}
1303EXPORT_SYMBOL(phy_attached_info);
1304
1305#define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)"
1306char *phy_attached_info_irq(struct phy_device *phydev)
1307{
1308 char *irq_str;
1309 char irq_num[8];
1310
1311 switch(phydev->irq) {
1312 case PHY_POLL:
1313 irq_str = "POLL";
1314 break;
1315 case PHY_MAC_INTERRUPT:
1316 irq_str = "MAC";
1317 break;
1318 default:
1319 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1320 irq_str = irq_num;
1321 break;
1322 }
1323
1324 return kasprintf(GFP_KERNEL, "%s", irq_str);
1325}
1326EXPORT_SYMBOL(phy_attached_info_irq);
1327
1328void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1329{
1330 const char *unbound = phydev->drv ? "" : "[unbound] ";
1331 char *irq_str = phy_attached_info_irq(phydev);
1332
1333 if (!fmt) {
1334 phydev_info(phydev, ATTACHED_FMT "\n", unbound,
1335 phydev_name(phydev), irq_str);
1336 } else {
1337 va_list ap;
1338
1339 phydev_info(phydev, ATTACHED_FMT, unbound,
1340 phydev_name(phydev), irq_str);
1341
1342 va_start(ap, fmt);
1343 vprintk(fmt, ap);
1344 va_end(ap);
1345 }
1346 kfree(irq_str);
1347}
1348EXPORT_SYMBOL(phy_attached_print);
1349
1350static void phy_sysfs_create_links(struct phy_device *phydev)
1351{
1352 struct net_device *dev = phydev->attached_dev;
1353 int err;
1354
1355 if (!dev)
1356 return;
1357
1358 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1359 "attached_dev");
1360 if (err)
1361 return;
1362
1363 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1364 &phydev->mdio.dev.kobj,
1365 "phydev");
1366 if (err) {
1367 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1368 kobject_name(&phydev->mdio.dev.kobj),
1369 err);
1370 /* non-fatal - some net drivers can use one netdevice
1371 * with more then one phy
1372 */
1373 }
1374
1375 phydev->sysfs_links = true;
1376}
1377
1378static ssize_t
1379phy_standalone_show(struct device *dev, struct device_attribute *attr,
1380 char *buf)
1381{
1382 struct phy_device *phydev = to_phy_device(dev);
1383
1384 return sysfs_emit(buf, "%d\n", !phydev->attached_dev);
1385}
1386static DEVICE_ATTR_RO(phy_standalone);
1387
1388/**
1389 * phy_sfp_connect_phy - Connect the SFP module's PHY to the upstream PHY
1390 * @upstream: pointer to the upstream phy device
1391 * @phy: pointer to the SFP module's phy device
1392 *
1393 * This helper allows keeping track of PHY devices on the link. It adds the
1394 * SFP module's phy to the phy namespace of the upstream phy
1395 *
1396 * Return: 0 on success, otherwise a negative error code.
1397 */
1398int phy_sfp_connect_phy(void *upstream, struct phy_device *phy)
1399{
1400 struct phy_device *phydev = upstream;
1401 struct net_device *dev = phydev->attached_dev;
1402
1403 if (dev)
1404 return phy_link_topo_add_phy(dev, phy, PHY_UPSTREAM_PHY, phydev);
1405
1406 return 0;
1407}
1408EXPORT_SYMBOL(phy_sfp_connect_phy);
1409
1410/**
1411 * phy_sfp_disconnect_phy - Disconnect the SFP module's PHY from the upstream PHY
1412 * @upstream: pointer to the upstream phy device
1413 * @phy: pointer to the SFP module's phy device
1414 *
1415 * This helper allows keeping track of PHY devices on the link. It removes the
1416 * SFP module's phy to the phy namespace of the upstream phy. As the module phy
1417 * will be destroyed, re-inserting the same module will add a new phy with a
1418 * new index.
1419 */
1420void phy_sfp_disconnect_phy(void *upstream, struct phy_device *phy)
1421{
1422 struct phy_device *phydev = upstream;
1423 struct net_device *dev = phydev->attached_dev;
1424
1425 if (dev)
1426 phy_link_topo_del_phy(dev, phy);
1427}
1428EXPORT_SYMBOL(phy_sfp_disconnect_phy);
1429
1430/**
1431 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1432 * @upstream: pointer to the phy device
1433 * @bus: sfp bus representing cage being attached
1434 *
1435 * This is used to fill in the sfp_upstream_ops .attach member.
1436 */
1437void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1438{
1439 struct phy_device *phydev = upstream;
1440
1441 if (phydev->attached_dev)
1442 phydev->attached_dev->sfp_bus = bus;
1443 phydev->sfp_bus_attached = true;
1444}
1445EXPORT_SYMBOL(phy_sfp_attach);
1446
1447/**
1448 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1449 * @upstream: pointer to the phy device
1450 * @bus: sfp bus representing cage being attached
1451 *
1452 * This is used to fill in the sfp_upstream_ops .detach member.
1453 */
1454void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1455{
1456 struct phy_device *phydev = upstream;
1457
1458 if (phydev->attached_dev)
1459 phydev->attached_dev->sfp_bus = NULL;
1460 phydev->sfp_bus_attached = false;
1461}
1462EXPORT_SYMBOL(phy_sfp_detach);
1463
1464/**
1465 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1466 * @phydev: Pointer to phy_device
1467 * @ops: SFP's upstream operations
1468 */
1469int phy_sfp_probe(struct phy_device *phydev,
1470 const struct sfp_upstream_ops *ops)
1471{
1472 struct sfp_bus *bus;
1473 int ret = 0;
1474
1475 if (phydev->mdio.dev.fwnode) {
1476 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1477 if (IS_ERR(bus))
1478 return PTR_ERR(bus);
1479
1480 phydev->sfp_bus = bus;
1481
1482 ret = sfp_bus_add_upstream(bus, phydev, ops);
1483 sfp_bus_put(bus);
1484 }
1485 return ret;
1486}
1487EXPORT_SYMBOL(phy_sfp_probe);
1488
1489static bool phy_drv_supports_irq(const struct phy_driver *phydrv)
1490{
1491 return phydrv->config_intr && phydrv->handle_interrupt;
1492}
1493
1494/**
1495 * phy_attach_direct - attach a network device to a given PHY device pointer
1496 * @dev: network device to attach
1497 * @phydev: Pointer to phy_device to attach
1498 * @flags: PHY device's dev_flags
1499 * @interface: PHY device's interface
1500 *
1501 * Description: Called by drivers to attach to a particular PHY
1502 * device. The phy_device is found, and properly hooked up
1503 * to the phy_driver. If no driver is attached, then a
1504 * generic driver is used. The phy_device is given a ptr to
1505 * the attaching device, and given a callback for link status
1506 * change. The phy_device is returned to the attaching driver.
1507 * This function takes a reference on the phy device.
1508 */
1509int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1510 u32 flags, phy_interface_t interface)
1511{
1512 struct mii_bus *bus = phydev->mdio.bus;
1513 struct device *d = &phydev->mdio.dev;
1514 struct module *ndev_owner = NULL;
1515 bool using_genphy = false;
1516 int err;
1517
1518 /* For Ethernet device drivers that register their own MDIO bus, we
1519 * will have bus->owner match ndev_mod, so we do not want to increment
1520 * our own module->refcnt here, otherwise we would not be able to
1521 * unload later on.
1522 */
1523 if (dev)
1524 ndev_owner = dev->dev.parent->driver->owner;
1525 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1526 phydev_err(phydev, "failed to get the bus module\n");
1527 return -EIO;
1528 }
1529
1530 get_device(d);
1531
1532 /* Assume that if there is no driver, that it doesn't
1533 * exist, and we should use the genphy driver.
1534 */
1535 if (!d->driver) {
1536 if (phydev->is_c45)
1537 d->driver = &genphy_c45_driver.mdiodrv.driver;
1538 else
1539 d->driver = &genphy_driver.mdiodrv.driver;
1540
1541 using_genphy = true;
1542 }
1543
1544 if (!try_module_get(d->driver->owner)) {
1545 phydev_err(phydev, "failed to get the device driver module\n");
1546 err = -EIO;
1547 goto error_put_device;
1548 }
1549
1550 if (using_genphy) {
1551 err = d->driver->probe(d);
1552 if (err >= 0)
1553 err = device_bind_driver(d);
1554
1555 if (err)
1556 goto error_module_put;
1557 }
1558
1559 if (phydev->attached_dev) {
1560 dev_err(&dev->dev, "PHY already attached\n");
1561 err = -EBUSY;
1562 goto error;
1563 }
1564
1565 phydev->phy_link_change = phy_link_change;
1566 if (dev) {
1567 phydev->attached_dev = dev;
1568 dev->phydev = phydev;
1569
1570 if (phydev->sfp_bus_attached)
1571 dev->sfp_bus = phydev->sfp_bus;
1572
1573 err = phy_link_topo_add_phy(dev, phydev, PHY_UPSTREAM_MAC, dev);
1574 if (err)
1575 goto error;
1576 }
1577
1578 /* Some Ethernet drivers try to connect to a PHY device before
1579 * calling register_netdevice() -> netdev_register_kobject() and
1580 * does the dev->dev.kobj initialization. Here we only check for
1581 * success which indicates that the network device kobject is
1582 * ready. Once we do that we still need to keep track of whether
1583 * links were successfully set up or not for phy_detach() to
1584 * remove them accordingly.
1585 */
1586 phydev->sysfs_links = false;
1587
1588 phy_sysfs_create_links(phydev);
1589
1590 if (!phydev->attached_dev) {
1591 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1592 &dev_attr_phy_standalone.attr);
1593 if (err)
1594 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1595 }
1596
1597 phydev->dev_flags |= flags;
1598
1599 phydev->interface = interface;
1600
1601 phydev->state = PHY_READY;
1602
1603 phydev->interrupts = PHY_INTERRUPT_DISABLED;
1604
1605 /* PHYs can request to use poll mode even though they have an
1606 * associated interrupt line. This could be the case if they
1607 * detect a broken interrupt handling.
1608 */
1609 if (phydev->dev_flags & PHY_F_NO_IRQ)
1610 phydev->irq = PHY_POLL;
1611
1612 if (!phy_drv_supports_irq(phydev->drv) && phy_interrupt_is_valid(phydev))
1613 phydev->irq = PHY_POLL;
1614
1615 /* Port is set to PORT_TP by default and the actual PHY driver will set
1616 * it to different value depending on the PHY configuration. If we have
1617 * the generic PHY driver we can't figure it out, thus set the old
1618 * legacy PORT_MII value.
1619 */
1620 if (using_genphy)
1621 phydev->port = PORT_MII;
1622
1623 /* Initial carrier state is off as the phy is about to be
1624 * (re)initialized.
1625 */
1626 if (dev)
1627 netif_carrier_off(phydev->attached_dev);
1628
1629 /* Do initial configuration here, now that
1630 * we have certain key parameters
1631 * (dev_flags and interface)
1632 */
1633 err = phy_init_hw(phydev);
1634 if (err)
1635 goto error;
1636
1637 phy_resume(phydev);
1638 if (!phydev->is_on_sfp_module)
1639 phy_led_triggers_register(phydev);
1640
1641 /**
1642 * If the external phy used by current mac interface is managed by
1643 * another mac interface, so we should create a device link between
1644 * phy dev and mac dev.
1645 */
1646 if (dev && phydev->mdio.bus->parent && dev->dev.parent != phydev->mdio.bus->parent)
1647 phydev->devlink = device_link_add(dev->dev.parent, &phydev->mdio.dev,
1648 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
1649
1650 return err;
1651
1652error:
1653 /* phy_detach() does all of the cleanup below */
1654 phy_detach(phydev);
1655 return err;
1656
1657error_module_put:
1658 module_put(d->driver->owner);
1659 d->driver = NULL;
1660error_put_device:
1661 put_device(d);
1662 if (ndev_owner != bus->owner)
1663 module_put(bus->owner);
1664 return err;
1665}
1666EXPORT_SYMBOL(phy_attach_direct);
1667
1668/**
1669 * phy_attach - attach a network device to a particular PHY device
1670 * @dev: network device to attach
1671 * @bus_id: Bus ID of PHY device to attach
1672 * @interface: PHY device's interface
1673 *
1674 * Description: Same as phy_attach_direct() except that a PHY bus_id
1675 * string is passed instead of a pointer to a struct phy_device.
1676 */
1677struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1678 phy_interface_t interface)
1679{
1680 struct phy_device *phydev;
1681 struct device *d;
1682 int rc;
1683
1684 if (!dev)
1685 return ERR_PTR(-EINVAL);
1686
1687 /* Search the list of PHY devices on the mdio bus for the
1688 * PHY with the requested name
1689 */
1690 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1691 if (!d) {
1692 pr_err("PHY %s not found\n", bus_id);
1693 return ERR_PTR(-ENODEV);
1694 }
1695 phydev = to_phy_device(d);
1696
1697 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1698 put_device(d);
1699 if (rc)
1700 return ERR_PTR(rc);
1701
1702 return phydev;
1703}
1704EXPORT_SYMBOL(phy_attach);
1705
1706static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1707 struct device_driver *driver)
1708{
1709 struct device *d = &phydev->mdio.dev;
1710 bool ret = false;
1711
1712 if (!phydev->drv)
1713 return ret;
1714
1715 get_device(d);
1716 ret = d->driver == driver;
1717 put_device(d);
1718
1719 return ret;
1720}
1721
1722bool phy_driver_is_genphy(struct phy_device *phydev)
1723{
1724 return phy_driver_is_genphy_kind(phydev,
1725 &genphy_driver.mdiodrv.driver);
1726}
1727EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1728
1729bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1730{
1731 return phy_driver_is_genphy_kind(phydev,
1732 &genphy_c45_driver.mdiodrv.driver);
1733}
1734EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1735
1736/**
1737 * phy_package_join - join a common PHY group
1738 * @phydev: target phy_device struct
1739 * @base_addr: cookie and base PHY address of PHY package for offset
1740 * calculation of global register access
1741 * @priv_size: if non-zero allocate this amount of bytes for private data
1742 *
1743 * This joins a PHY group and provides a shared storage for all phydevs in
1744 * this group. This is intended to be used for packages which contain
1745 * more than one PHY, for example a quad PHY transceiver.
1746 *
1747 * The base_addr parameter serves as cookie which has to have the same values
1748 * for all members of one group and as the base PHY address of the PHY package
1749 * for offset calculation to access generic registers of a PHY package.
1750 * Usually, one of the PHY addresses of the different PHYs in the package
1751 * provides access to these global registers.
1752 * The address which is given here, will be used in the phy_package_read()
1753 * and phy_package_write() convenience functions as base and added to the
1754 * passed offset in those functions.
1755 *
1756 * This will set the shared pointer of the phydev to the shared storage.
1757 * If this is the first call for a this cookie the shared storage will be
1758 * allocated. If priv_size is non-zero, the given amount of bytes are
1759 * allocated for the priv member.
1760 *
1761 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join()
1762 * with the same cookie but a different priv_size is an error.
1763 */
1764int phy_package_join(struct phy_device *phydev, int base_addr, size_t priv_size)
1765{
1766 struct mii_bus *bus = phydev->mdio.bus;
1767 struct phy_package_shared *shared;
1768 int ret;
1769
1770 if (base_addr < 0 || base_addr >= PHY_MAX_ADDR)
1771 return -EINVAL;
1772
1773 mutex_lock(&bus->shared_lock);
1774 shared = bus->shared[base_addr];
1775 if (!shared) {
1776 ret = -ENOMEM;
1777 shared = kzalloc(sizeof(*shared), GFP_KERNEL);
1778 if (!shared)
1779 goto err_unlock;
1780 if (priv_size) {
1781 shared->priv = kzalloc(priv_size, GFP_KERNEL);
1782 if (!shared->priv)
1783 goto err_free;
1784 shared->priv_size = priv_size;
1785 }
1786 shared->base_addr = base_addr;
1787 shared->np = NULL;
1788 refcount_set(&shared->refcnt, 1);
1789 bus->shared[base_addr] = shared;
1790 } else {
1791 ret = -EINVAL;
1792 if (priv_size && priv_size != shared->priv_size)
1793 goto err_unlock;
1794 refcount_inc(&shared->refcnt);
1795 }
1796 mutex_unlock(&bus->shared_lock);
1797
1798 phydev->shared = shared;
1799
1800 return 0;
1801
1802err_free:
1803 kfree(shared);
1804err_unlock:
1805 mutex_unlock(&bus->shared_lock);
1806 return ret;
1807}
1808EXPORT_SYMBOL_GPL(phy_package_join);
1809
1810/**
1811 * of_phy_package_join - join a common PHY group in PHY package
1812 * @phydev: target phy_device struct
1813 * @priv_size: if non-zero allocate this amount of bytes for private data
1814 *
1815 * This is a variant of phy_package_join for PHY package defined in DT.
1816 *
1817 * The parent node of the @phydev is checked as a valid PHY package node
1818 * structure (by matching the node name "ethernet-phy-package") and the
1819 * base_addr for the PHY package is passed to phy_package_join.
1820 *
1821 * With this configuration the shared struct will also have the np value
1822 * filled to use additional DT defined properties in PHY specific
1823 * probe_once and config_init_once PHY package OPs.
1824 *
1825 * Returns < 0 on error, 0 on success. Esp. calling phy_package_join()
1826 * with the same cookie but a different priv_size is an error. Or a parent
1827 * node is not detected or is not valid or doesn't match the expected node
1828 * name for PHY package.
1829 */
1830int of_phy_package_join(struct phy_device *phydev, size_t priv_size)
1831{
1832 struct device_node *node = phydev->mdio.dev.of_node;
1833 struct device_node *package_node;
1834 u32 base_addr;
1835 int ret;
1836
1837 if (!node)
1838 return -EINVAL;
1839
1840 package_node = of_get_parent(node);
1841 if (!package_node)
1842 return -EINVAL;
1843
1844 if (!of_node_name_eq(package_node, "ethernet-phy-package")) {
1845 ret = -EINVAL;
1846 goto exit;
1847 }
1848
1849 if (of_property_read_u32(package_node, "reg", &base_addr)) {
1850 ret = -EINVAL;
1851 goto exit;
1852 }
1853
1854 ret = phy_package_join(phydev, base_addr, priv_size);
1855 if (ret)
1856 goto exit;
1857
1858 phydev->shared->np = package_node;
1859
1860 return 0;
1861exit:
1862 of_node_put(package_node);
1863 return ret;
1864}
1865EXPORT_SYMBOL_GPL(of_phy_package_join);
1866
1867/**
1868 * phy_package_leave - leave a common PHY group
1869 * @phydev: target phy_device struct
1870 *
1871 * This leaves a PHY group created by phy_package_join(). If this phydev
1872 * was the last user of the shared data between the group, this data is
1873 * freed. Resets the phydev->shared pointer to NULL.
1874 */
1875void phy_package_leave(struct phy_device *phydev)
1876{
1877 struct phy_package_shared *shared = phydev->shared;
1878 struct mii_bus *bus = phydev->mdio.bus;
1879
1880 if (!shared)
1881 return;
1882
1883 /* Decrease the node refcount on leave if present */
1884 if (shared->np)
1885 of_node_put(shared->np);
1886
1887 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) {
1888 bus->shared[shared->base_addr] = NULL;
1889 mutex_unlock(&bus->shared_lock);
1890 kfree(shared->priv);
1891 kfree(shared);
1892 }
1893
1894 phydev->shared = NULL;
1895}
1896EXPORT_SYMBOL_GPL(phy_package_leave);
1897
1898static void devm_phy_package_leave(struct device *dev, void *res)
1899{
1900 phy_package_leave(*(struct phy_device **)res);
1901}
1902
1903/**
1904 * devm_phy_package_join - resource managed phy_package_join()
1905 * @dev: device that is registering this PHY package
1906 * @phydev: target phy_device struct
1907 * @base_addr: cookie and base PHY address of PHY package for offset
1908 * calculation of global register access
1909 * @priv_size: if non-zero allocate this amount of bytes for private data
1910 *
1911 * Managed phy_package_join(). Shared storage fetched by this function,
1912 * phy_package_leave() is automatically called on driver detach. See
1913 * phy_package_join() for more information.
1914 */
1915int devm_phy_package_join(struct device *dev, struct phy_device *phydev,
1916 int base_addr, size_t priv_size)
1917{
1918 struct phy_device **ptr;
1919 int ret;
1920
1921 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
1922 GFP_KERNEL);
1923 if (!ptr)
1924 return -ENOMEM;
1925
1926 ret = phy_package_join(phydev, base_addr, priv_size);
1927
1928 if (!ret) {
1929 *ptr = phydev;
1930 devres_add(dev, ptr);
1931 } else {
1932 devres_free(ptr);
1933 }
1934
1935 return ret;
1936}
1937EXPORT_SYMBOL_GPL(devm_phy_package_join);
1938
1939/**
1940 * devm_of_phy_package_join - resource managed of_phy_package_join()
1941 * @dev: device that is registering this PHY package
1942 * @phydev: target phy_device struct
1943 * @priv_size: if non-zero allocate this amount of bytes for private data
1944 *
1945 * Managed of_phy_package_join(). Shared storage fetched by this function,
1946 * phy_package_leave() is automatically called on driver detach. See
1947 * of_phy_package_join() for more information.
1948 */
1949int devm_of_phy_package_join(struct device *dev, struct phy_device *phydev,
1950 size_t priv_size)
1951{
1952 struct phy_device **ptr;
1953 int ret;
1954
1955 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
1956 GFP_KERNEL);
1957 if (!ptr)
1958 return -ENOMEM;
1959
1960 ret = of_phy_package_join(phydev, priv_size);
1961
1962 if (!ret) {
1963 *ptr = phydev;
1964 devres_add(dev, ptr);
1965 } else {
1966 devres_free(ptr);
1967 }
1968
1969 return ret;
1970}
1971EXPORT_SYMBOL_GPL(devm_of_phy_package_join);
1972
1973/**
1974 * phy_detach - detach a PHY device from its network device
1975 * @phydev: target phy_device struct
1976 *
1977 * This detaches the phy device from its network device and the phy
1978 * driver, and drops the reference count taken in phy_attach_direct().
1979 */
1980void phy_detach(struct phy_device *phydev)
1981{
1982 struct net_device *dev = phydev->attached_dev;
1983 struct module *ndev_owner = NULL;
1984 struct mii_bus *bus;
1985
1986 if (phydev->devlink)
1987 device_link_del(phydev->devlink);
1988
1989 if (phydev->sysfs_links) {
1990 if (dev)
1991 sysfs_remove_link(&dev->dev.kobj, "phydev");
1992 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1993 }
1994
1995 if (!phydev->attached_dev)
1996 sysfs_remove_file(&phydev->mdio.dev.kobj,
1997 &dev_attr_phy_standalone.attr);
1998
1999 phy_suspend(phydev);
2000 if (dev) {
2001 phydev->attached_dev->phydev = NULL;
2002 phydev->attached_dev = NULL;
2003 phy_link_topo_del_phy(dev, phydev);
2004 }
2005 phydev->phylink = NULL;
2006
2007 if (!phydev->is_on_sfp_module)
2008 phy_led_triggers_unregister(phydev);
2009
2010 if (phydev->mdio.dev.driver)
2011 module_put(phydev->mdio.dev.driver->owner);
2012
2013 /* If the device had no specific driver before (i.e. - it
2014 * was using the generic driver), we unbind the device
2015 * from the generic driver so that there's a chance a
2016 * real driver could be loaded
2017 */
2018 if (phy_driver_is_genphy(phydev) ||
2019 phy_driver_is_genphy_10g(phydev))
2020 device_release_driver(&phydev->mdio.dev);
2021
2022 /* Assert the reset signal */
2023 phy_device_reset(phydev, 1);
2024
2025 /*
2026 * The phydev might go away on the put_device() below, so avoid
2027 * a use-after-free bug by reading the underlying bus first.
2028 */
2029 bus = phydev->mdio.bus;
2030
2031 put_device(&phydev->mdio.dev);
2032 if (dev)
2033 ndev_owner = dev->dev.parent->driver->owner;
2034 if (ndev_owner != bus->owner)
2035 module_put(bus->owner);
2036}
2037EXPORT_SYMBOL(phy_detach);
2038
2039int phy_suspend(struct phy_device *phydev)
2040{
2041 struct net_device *netdev = phydev->attached_dev;
2042 const struct phy_driver *phydrv = phydev->drv;
2043 int ret;
2044
2045 if (phydev->suspended || !phydrv)
2046 return 0;
2047
2048 phydev->wol_enabled = phy_drv_wol_enabled(phydev) ||
2049 (netdev && netdev->ethtool->wol_enabled);
2050 /* If the device has WOL enabled, we cannot suspend the PHY */
2051 if (phydev->wol_enabled && !(phydrv->flags & PHY_ALWAYS_CALL_SUSPEND))
2052 return -EBUSY;
2053
2054 if (!phydrv->suspend)
2055 return 0;
2056
2057 ret = phydrv->suspend(phydev);
2058 if (!ret)
2059 phydev->suspended = true;
2060
2061 return ret;
2062}
2063EXPORT_SYMBOL(phy_suspend);
2064
2065int __phy_resume(struct phy_device *phydev)
2066{
2067 const struct phy_driver *phydrv = phydev->drv;
2068 int ret;
2069
2070 lockdep_assert_held(&phydev->lock);
2071
2072 if (!phydrv || !phydrv->resume)
2073 return 0;
2074
2075 ret = phydrv->resume(phydev);
2076 if (!ret)
2077 phydev->suspended = false;
2078
2079 return ret;
2080}
2081EXPORT_SYMBOL(__phy_resume);
2082
2083int phy_resume(struct phy_device *phydev)
2084{
2085 int ret;
2086
2087 mutex_lock(&phydev->lock);
2088 ret = __phy_resume(phydev);
2089 mutex_unlock(&phydev->lock);
2090
2091 return ret;
2092}
2093EXPORT_SYMBOL(phy_resume);
2094
2095int phy_loopback(struct phy_device *phydev, bool enable)
2096{
2097 int ret = 0;
2098
2099 if (!phydev->drv)
2100 return -EIO;
2101
2102 mutex_lock(&phydev->lock);
2103
2104 if (enable && phydev->loopback_enabled) {
2105 ret = -EBUSY;
2106 goto out;
2107 }
2108
2109 if (!enable && !phydev->loopback_enabled) {
2110 ret = -EINVAL;
2111 goto out;
2112 }
2113
2114 if (phydev->drv->set_loopback)
2115 ret = phydev->drv->set_loopback(phydev, enable);
2116 else
2117 ret = genphy_loopback(phydev, enable);
2118
2119 if (ret)
2120 goto out;
2121
2122 phydev->loopback_enabled = enable;
2123
2124out:
2125 mutex_unlock(&phydev->lock);
2126 return ret;
2127}
2128EXPORT_SYMBOL(phy_loopback);
2129
2130/**
2131 * phy_reset_after_clk_enable - perform a PHY reset if needed
2132 * @phydev: target phy_device struct
2133 *
2134 * Description: Some PHYs are known to need a reset after their refclk was
2135 * enabled. This function evaluates the flags and perform the reset if it's
2136 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
2137 * was reset.
2138 */
2139int phy_reset_after_clk_enable(struct phy_device *phydev)
2140{
2141 if (!phydev || !phydev->drv)
2142 return -ENODEV;
2143
2144 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
2145 phy_device_reset(phydev, 1);
2146 phy_device_reset(phydev, 0);
2147 return 1;
2148 }
2149
2150 return 0;
2151}
2152EXPORT_SYMBOL(phy_reset_after_clk_enable);
2153
2154/* Generic PHY support and helper functions */
2155
2156/**
2157 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
2158 * @phydev: target phy_device struct
2159 * @advert: auto-negotiation parameters to advertise
2160 *
2161 * Description: Writes MII_ADVERTISE with the appropriate values,
2162 * after sanitizing the values to make sure we only advertise
2163 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
2164 * hasn't changed, and > 0 if it has changed.
2165 */
2166static int genphy_config_advert(struct phy_device *phydev,
2167 const unsigned long *advert)
2168{
2169 int err, bmsr, changed = 0;
2170 u32 adv;
2171
2172 adv = linkmode_adv_to_mii_adv_t(advert);
2173
2174 /* Setup standard advertisement */
2175 err = phy_modify_changed(phydev, MII_ADVERTISE,
2176 ADVERTISE_ALL | ADVERTISE_100BASE4 |
2177 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
2178 adv);
2179 if (err < 0)
2180 return err;
2181 if (err > 0)
2182 changed = 1;
2183
2184 bmsr = phy_read(phydev, MII_BMSR);
2185 if (bmsr < 0)
2186 return bmsr;
2187
2188 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
2189 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
2190 * logical 1.
2191 */
2192 if (!(bmsr & BMSR_ESTATEN))
2193 return changed;
2194
2195 adv = linkmode_adv_to_mii_ctrl1000_t(advert);
2196
2197 err = phy_modify_changed(phydev, MII_CTRL1000,
2198 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
2199 adv);
2200 if (err < 0)
2201 return err;
2202 if (err > 0)
2203 changed = 1;
2204
2205 return changed;
2206}
2207
2208/**
2209 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
2210 * @phydev: target phy_device struct
2211 *
2212 * Description: Writes MII_ADVERTISE with the appropriate values,
2213 * after sanitizing the values to make sure we only advertise
2214 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
2215 * hasn't changed, and > 0 if it has changed. This function is intended
2216 * for Clause 37 1000Base-X mode.
2217 */
2218static int genphy_c37_config_advert(struct phy_device *phydev)
2219{
2220 u16 adv = 0;
2221
2222 /* Only allow advertising what this PHY supports */
2223 linkmode_and(phydev->advertising, phydev->advertising,
2224 phydev->supported);
2225
2226 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2227 phydev->advertising))
2228 adv |= ADVERTISE_1000XFULL;
2229 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2230 phydev->advertising))
2231 adv |= ADVERTISE_1000XPAUSE;
2232 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2233 phydev->advertising))
2234 adv |= ADVERTISE_1000XPSE_ASYM;
2235
2236 return phy_modify_changed(phydev, MII_ADVERTISE,
2237 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
2238 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
2239 adv);
2240}
2241
2242/**
2243 * genphy_setup_forced - configures/forces speed/duplex from @phydev
2244 * @phydev: target phy_device struct
2245 *
2246 * Description: Configures MII_BMCR to force speed/duplex
2247 * to the values in phydev. Assumes that the values are valid.
2248 * Please see phy_sanitize_settings().
2249 */
2250int genphy_setup_forced(struct phy_device *phydev)
2251{
2252 u16 ctl;
2253
2254 phydev->pause = 0;
2255 phydev->asym_pause = 0;
2256
2257 ctl = mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2258
2259 return phy_modify(phydev, MII_BMCR,
2260 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
2261}
2262EXPORT_SYMBOL(genphy_setup_forced);
2263
2264static int genphy_setup_master_slave(struct phy_device *phydev)
2265{
2266 u16 ctl = 0;
2267
2268 if (!phydev->is_gigabit_capable)
2269 return 0;
2270
2271 switch (phydev->master_slave_set) {
2272 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
2273 ctl |= CTL1000_PREFER_MASTER;
2274 break;
2275 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
2276 break;
2277 case MASTER_SLAVE_CFG_MASTER_FORCE:
2278 ctl |= CTL1000_AS_MASTER;
2279 fallthrough;
2280 case MASTER_SLAVE_CFG_SLAVE_FORCE:
2281 ctl |= CTL1000_ENABLE_MASTER;
2282 break;
2283 case MASTER_SLAVE_CFG_UNKNOWN:
2284 case MASTER_SLAVE_CFG_UNSUPPORTED:
2285 return 0;
2286 default:
2287 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
2288 return -EOPNOTSUPP;
2289 }
2290
2291 return phy_modify_changed(phydev, MII_CTRL1000,
2292 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER |
2293 CTL1000_PREFER_MASTER), ctl);
2294}
2295
2296int genphy_read_master_slave(struct phy_device *phydev)
2297{
2298 int cfg, state;
2299 int val;
2300
2301 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
2302 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
2303
2304 val = phy_read(phydev, MII_CTRL1000);
2305 if (val < 0)
2306 return val;
2307
2308 if (val & CTL1000_ENABLE_MASTER) {
2309 if (val & CTL1000_AS_MASTER)
2310 cfg = MASTER_SLAVE_CFG_MASTER_FORCE;
2311 else
2312 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE;
2313 } else {
2314 if (val & CTL1000_PREFER_MASTER)
2315 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED;
2316 else
2317 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
2318 }
2319
2320 val = phy_read(phydev, MII_STAT1000);
2321 if (val < 0)
2322 return val;
2323
2324 if (val & LPA_1000MSFAIL) {
2325 state = MASTER_SLAVE_STATE_ERR;
2326 } else if (phydev->link) {
2327 /* this bits are valid only for active link */
2328 if (val & LPA_1000MSRES)
2329 state = MASTER_SLAVE_STATE_MASTER;
2330 else
2331 state = MASTER_SLAVE_STATE_SLAVE;
2332 } else {
2333 state = MASTER_SLAVE_STATE_UNKNOWN;
2334 }
2335
2336 phydev->master_slave_get = cfg;
2337 phydev->master_slave_state = state;
2338
2339 return 0;
2340}
2341EXPORT_SYMBOL(genphy_read_master_slave);
2342
2343/**
2344 * genphy_restart_aneg - Enable and Restart Autonegotiation
2345 * @phydev: target phy_device struct
2346 */
2347int genphy_restart_aneg(struct phy_device *phydev)
2348{
2349 /* Don't isolate the PHY if we're negotiating */
2350 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
2351 BMCR_ANENABLE | BMCR_ANRESTART);
2352}
2353EXPORT_SYMBOL(genphy_restart_aneg);
2354
2355/**
2356 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
2357 * @phydev: target phy_device struct
2358 * @restart: whether aneg restart is requested
2359 *
2360 * Check, and restart auto-negotiation if needed.
2361 */
2362int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
2363{
2364 int ret;
2365
2366 if (!restart) {
2367 /* Advertisement hasn't changed, but maybe aneg was never on to
2368 * begin with? Or maybe phy was isolated?
2369 */
2370 ret = phy_read(phydev, MII_BMCR);
2371 if (ret < 0)
2372 return ret;
2373
2374 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
2375 restart = true;
2376 }
2377
2378 if (restart)
2379 return genphy_restart_aneg(phydev);
2380
2381 return 0;
2382}
2383EXPORT_SYMBOL(genphy_check_and_restart_aneg);
2384
2385/**
2386 * __genphy_config_aneg - restart auto-negotiation or write BMCR
2387 * @phydev: target phy_device struct
2388 * @changed: whether autoneg is requested
2389 *
2390 * Description: If auto-negotiation is enabled, we configure the
2391 * advertising, and then restart auto-negotiation. If it is not
2392 * enabled, then we write the BMCR.
2393 */
2394int __genphy_config_aneg(struct phy_device *phydev, bool changed)
2395{
2396 __ETHTOOL_DECLARE_LINK_MODE_MASK(fixed_advert);
2397 const struct phy_setting *set;
2398 unsigned long *advert;
2399 int err;
2400
2401 err = genphy_c45_an_config_eee_aneg(phydev);
2402 if (err < 0)
2403 return err;
2404 else if (err)
2405 changed = true;
2406
2407 err = genphy_setup_master_slave(phydev);
2408 if (err < 0)
2409 return err;
2410 else if (err)
2411 changed = true;
2412
2413 if (phydev->autoneg == AUTONEG_ENABLE) {
2414 /* Only allow advertising what this PHY supports */
2415 linkmode_and(phydev->advertising, phydev->advertising,
2416 phydev->supported);
2417 advert = phydev->advertising;
2418 } else if (phydev->speed < SPEED_1000) {
2419 return genphy_setup_forced(phydev);
2420 } else {
2421 linkmode_zero(fixed_advert);
2422
2423 set = phy_lookup_setting(phydev->speed, phydev->duplex,
2424 phydev->supported, true);
2425 if (set)
2426 linkmode_set_bit(set->bit, fixed_advert);
2427
2428 advert = fixed_advert;
2429 }
2430
2431 err = genphy_config_advert(phydev, advert);
2432 if (err < 0) /* error */
2433 return err;
2434 else if (err)
2435 changed = true;
2436
2437 return genphy_check_and_restart_aneg(phydev, changed);
2438}
2439EXPORT_SYMBOL(__genphy_config_aneg);
2440
2441/**
2442 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
2443 * @phydev: target phy_device struct
2444 *
2445 * Description: If auto-negotiation is enabled, we configure the
2446 * advertising, and then restart auto-negotiation. If it is not
2447 * enabled, then we write the BMCR. This function is intended
2448 * for use with Clause 37 1000Base-X mode.
2449 */
2450int genphy_c37_config_aneg(struct phy_device *phydev)
2451{
2452 int err, changed;
2453
2454 if (phydev->autoneg != AUTONEG_ENABLE)
2455 return genphy_setup_forced(phydev);
2456
2457 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
2458 BMCR_SPEED1000);
2459 if (err)
2460 return err;
2461
2462 changed = genphy_c37_config_advert(phydev);
2463 if (changed < 0) /* error */
2464 return changed;
2465
2466 if (!changed) {
2467 /* Advertisement hasn't changed, but maybe aneg was never on to
2468 * begin with? Or maybe phy was isolated?
2469 */
2470 int ctl = phy_read(phydev, MII_BMCR);
2471
2472 if (ctl < 0)
2473 return ctl;
2474
2475 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
2476 changed = 1; /* do restart aneg */
2477 }
2478
2479 /* Only restart aneg if we are advertising something different
2480 * than we were before.
2481 */
2482 if (changed > 0)
2483 return genphy_restart_aneg(phydev);
2484
2485 return 0;
2486}
2487EXPORT_SYMBOL(genphy_c37_config_aneg);
2488
2489/**
2490 * genphy_aneg_done - return auto-negotiation status
2491 * @phydev: target phy_device struct
2492 *
2493 * Description: Reads the status register and returns 0 either if
2494 * auto-negotiation is incomplete, or if there was an error.
2495 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
2496 */
2497int genphy_aneg_done(struct phy_device *phydev)
2498{
2499 int retval = phy_read(phydev, MII_BMSR);
2500
2501 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
2502}
2503EXPORT_SYMBOL(genphy_aneg_done);
2504
2505/**
2506 * genphy_update_link - update link status in @phydev
2507 * @phydev: target phy_device struct
2508 *
2509 * Description: Update the value in phydev->link to reflect the
2510 * current link value. In order to do this, we need to read
2511 * the status register twice, keeping the second value.
2512 */
2513int genphy_update_link(struct phy_device *phydev)
2514{
2515 int status = 0, bmcr;
2516
2517 bmcr = phy_read(phydev, MII_BMCR);
2518 if (bmcr < 0)
2519 return bmcr;
2520
2521 /* Autoneg is being started, therefore disregard BMSR value and
2522 * report link as down.
2523 */
2524 if (bmcr & BMCR_ANRESTART)
2525 goto done;
2526
2527 /* The link state is latched low so that momentary link
2528 * drops can be detected. Do not double-read the status
2529 * in polling mode to detect such short link drops except
2530 * the link was already down.
2531 */
2532 if (!phy_polling_mode(phydev) || !phydev->link) {
2533 status = phy_read(phydev, MII_BMSR);
2534 if (status < 0)
2535 return status;
2536 else if (status & BMSR_LSTATUS)
2537 goto done;
2538 }
2539
2540 /* Read link and autonegotiation status */
2541 status = phy_read(phydev, MII_BMSR);
2542 if (status < 0)
2543 return status;
2544done:
2545 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
2546 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
2547
2548 /* Consider the case that autoneg was started and "aneg complete"
2549 * bit has been reset, but "link up" bit not yet.
2550 */
2551 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
2552 phydev->link = 0;
2553
2554 return 0;
2555}
2556EXPORT_SYMBOL(genphy_update_link);
2557
2558int genphy_read_lpa(struct phy_device *phydev)
2559{
2560 int lpa, lpagb;
2561
2562 if (phydev->autoneg == AUTONEG_ENABLE) {
2563 if (!phydev->autoneg_complete) {
2564 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2565 0);
2566 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
2567 return 0;
2568 }
2569
2570 if (phydev->is_gigabit_capable) {
2571 lpagb = phy_read(phydev, MII_STAT1000);
2572 if (lpagb < 0)
2573 return lpagb;
2574
2575 if (lpagb & LPA_1000MSFAIL) {
2576 int adv = phy_read(phydev, MII_CTRL1000);
2577
2578 if (adv < 0)
2579 return adv;
2580
2581 if (adv & CTL1000_ENABLE_MASTER)
2582 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
2583 else
2584 phydev_err(phydev, "Master/Slave resolution failed\n");
2585 return -ENOLINK;
2586 }
2587
2588 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2589 lpagb);
2590 }
2591
2592 lpa = phy_read(phydev, MII_LPA);
2593 if (lpa < 0)
2594 return lpa;
2595
2596 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
2597 } else {
2598 linkmode_zero(phydev->lp_advertising);
2599 }
2600
2601 return 0;
2602}
2603EXPORT_SYMBOL(genphy_read_lpa);
2604
2605/**
2606 * genphy_read_status_fixed - read the link parameters for !aneg mode
2607 * @phydev: target phy_device struct
2608 *
2609 * Read the current duplex and speed state for a PHY operating with
2610 * autonegotiation disabled.
2611 */
2612int genphy_read_status_fixed(struct phy_device *phydev)
2613{
2614 int bmcr = phy_read(phydev, MII_BMCR);
2615
2616 if (bmcr < 0)
2617 return bmcr;
2618
2619 if (bmcr & BMCR_FULLDPLX)
2620 phydev->duplex = DUPLEX_FULL;
2621 else
2622 phydev->duplex = DUPLEX_HALF;
2623
2624 if (bmcr & BMCR_SPEED1000)
2625 phydev->speed = SPEED_1000;
2626 else if (bmcr & BMCR_SPEED100)
2627 phydev->speed = SPEED_100;
2628 else
2629 phydev->speed = SPEED_10;
2630
2631 return 0;
2632}
2633EXPORT_SYMBOL(genphy_read_status_fixed);
2634
2635/**
2636 * genphy_read_status - check the link status and update current link state
2637 * @phydev: target phy_device struct
2638 *
2639 * Description: Check the link, then figure out the current state
2640 * by comparing what we advertise with what the link partner
2641 * advertises. Start by checking the gigabit possibilities,
2642 * then move on to 10/100.
2643 */
2644int genphy_read_status(struct phy_device *phydev)
2645{
2646 int err, old_link = phydev->link;
2647
2648 /* Update the link, but return if there was an error */
2649 err = genphy_update_link(phydev);
2650 if (err)
2651 return err;
2652
2653 /* why bother the PHY if nothing can have changed */
2654 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2655 return 0;
2656
2657 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
2658 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
2659 phydev->speed = SPEED_UNKNOWN;
2660 phydev->duplex = DUPLEX_UNKNOWN;
2661 phydev->pause = 0;
2662 phydev->asym_pause = 0;
2663
2664 if (phydev->is_gigabit_capable) {
2665 err = genphy_read_master_slave(phydev);
2666 if (err < 0)
2667 return err;
2668 }
2669
2670 err = genphy_read_lpa(phydev);
2671 if (err < 0)
2672 return err;
2673
2674 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2675 phy_resolve_aneg_linkmode(phydev);
2676 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2677 err = genphy_read_status_fixed(phydev);
2678 if (err < 0)
2679 return err;
2680 }
2681
2682 return 0;
2683}
2684EXPORT_SYMBOL(genphy_read_status);
2685
2686/**
2687 * genphy_c37_read_status - check the link status and update current link state
2688 * @phydev: target phy_device struct
2689 * @changed: pointer where to store if link changed
2690 *
2691 * Description: Check the link, then figure out the current state
2692 * by comparing what we advertise with what the link partner
2693 * advertises. This function is for Clause 37 1000Base-X mode.
2694 *
2695 * If link has changed, @changed is set to true, false otherwise.
2696 */
2697int genphy_c37_read_status(struct phy_device *phydev, bool *changed)
2698{
2699 int lpa, err, old_link = phydev->link;
2700
2701 /* Update the link, but return if there was an error */
2702 err = genphy_update_link(phydev);
2703 if (err)
2704 return err;
2705
2706 /* why bother the PHY if nothing can have changed */
2707 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link) {
2708 *changed = false;
2709 return 0;
2710 }
2711
2712 /* Signal link has changed */
2713 *changed = true;
2714 phydev->duplex = DUPLEX_UNKNOWN;
2715 phydev->pause = 0;
2716 phydev->asym_pause = 0;
2717
2718 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2719 lpa = phy_read(phydev, MII_LPA);
2720 if (lpa < 0)
2721 return lpa;
2722
2723 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2724 phydev->lp_advertising, lpa & LPA_LPACK);
2725 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2726 phydev->lp_advertising, lpa & LPA_1000XFULL);
2727 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2728 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2729 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2730 phydev->lp_advertising,
2731 lpa & LPA_1000XPAUSE_ASYM);
2732
2733 phy_resolve_aneg_linkmode(phydev);
2734 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2735 int bmcr = phy_read(phydev, MII_BMCR);
2736
2737 if (bmcr < 0)
2738 return bmcr;
2739
2740 if (bmcr & BMCR_FULLDPLX)
2741 phydev->duplex = DUPLEX_FULL;
2742 else
2743 phydev->duplex = DUPLEX_HALF;
2744 }
2745
2746 return 0;
2747}
2748EXPORT_SYMBOL(genphy_c37_read_status);
2749
2750/**
2751 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2752 * @phydev: target phy_device struct
2753 *
2754 * Description: Perform a software PHY reset using the standard
2755 * BMCR_RESET bit and poll for the reset bit to be cleared.
2756 *
2757 * Returns: 0 on success, < 0 on failure
2758 */
2759int genphy_soft_reset(struct phy_device *phydev)
2760{
2761 u16 res = BMCR_RESET;
2762 int ret;
2763
2764 if (phydev->autoneg == AUTONEG_ENABLE)
2765 res |= BMCR_ANRESTART;
2766
2767 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2768 if (ret < 0)
2769 return ret;
2770
2771 /* Clause 22 states that setting bit BMCR_RESET sets control registers
2772 * to their default value. Therefore the POWER DOWN bit is supposed to
2773 * be cleared after soft reset.
2774 */
2775 phydev->suspended = 0;
2776
2777 ret = phy_poll_reset(phydev);
2778 if (ret)
2779 return ret;
2780
2781 /* BMCR may be reset to defaults */
2782 if (phydev->autoneg == AUTONEG_DISABLE)
2783 ret = genphy_setup_forced(phydev);
2784
2785 return ret;
2786}
2787EXPORT_SYMBOL(genphy_soft_reset);
2788
2789irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev)
2790{
2791 /* It seems there are cases where the interrupts are handled by another
2792 * entity (ie an IRQ controller embedded inside the PHY) and do not
2793 * need any other interraction from phylib. In this case, just trigger
2794 * the state machine directly.
2795 */
2796 phy_trigger_machine(phydev);
2797
2798 return 0;
2799}
2800EXPORT_SYMBOL(genphy_handle_interrupt_no_ack);
2801
2802/**
2803 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2804 * @phydev: target phy_device struct
2805 *
2806 * Description: Reads the PHY's abilities and populates
2807 * phydev->supported accordingly.
2808 *
2809 * Returns: 0 on success, < 0 on failure
2810 */
2811int genphy_read_abilities(struct phy_device *phydev)
2812{
2813 int val;
2814
2815 linkmode_set_bit_array(phy_basic_ports_array,
2816 ARRAY_SIZE(phy_basic_ports_array),
2817 phydev->supported);
2818
2819 val = phy_read(phydev, MII_BMSR);
2820 if (val < 0)
2821 return val;
2822
2823 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2824 val & BMSR_ANEGCAPABLE);
2825
2826 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2827 val & BMSR_100FULL);
2828 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2829 val & BMSR_100HALF);
2830 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2831 val & BMSR_10FULL);
2832 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2833 val & BMSR_10HALF);
2834
2835 if (val & BMSR_ESTATEN) {
2836 val = phy_read(phydev, MII_ESTATUS);
2837 if (val < 0)
2838 return val;
2839
2840 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2841 phydev->supported, val & ESTATUS_1000_TFULL);
2842 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2843 phydev->supported, val & ESTATUS_1000_THALF);
2844 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2845 phydev->supported, val & ESTATUS_1000_XFULL);
2846 }
2847
2848 /* This is optional functionality. If not supported, we may get an error
2849 * which should be ignored.
2850 */
2851 genphy_c45_read_eee_abilities(phydev);
2852
2853 return 0;
2854}
2855EXPORT_SYMBOL(genphy_read_abilities);
2856
2857/* This is used for the phy device which doesn't support the MMD extended
2858 * register access, but it does have side effect when we are trying to access
2859 * the MMD register via indirect method.
2860 */
2861int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2862{
2863 return -EOPNOTSUPP;
2864}
2865EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2866
2867int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2868 u16 regnum, u16 val)
2869{
2870 return -EOPNOTSUPP;
2871}
2872EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2873
2874int genphy_suspend(struct phy_device *phydev)
2875{
2876 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2877}
2878EXPORT_SYMBOL(genphy_suspend);
2879
2880int genphy_resume(struct phy_device *phydev)
2881{
2882 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2883}
2884EXPORT_SYMBOL(genphy_resume);
2885
2886int genphy_loopback(struct phy_device *phydev, bool enable)
2887{
2888 if (enable) {
2889 u16 ctl = BMCR_LOOPBACK;
2890 int ret, val;
2891
2892 ctl |= mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2893
2894 phy_modify(phydev, MII_BMCR, ~0, ctl);
2895
2896 ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
2897 val & BMSR_LSTATUS,
2898 5000, 500000, true);
2899 if (ret)
2900 return ret;
2901 } else {
2902 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
2903
2904 phy_config_aneg(phydev);
2905 }
2906
2907 return 0;
2908}
2909EXPORT_SYMBOL(genphy_loopback);
2910
2911/**
2912 * phy_remove_link_mode - Remove a supported link mode
2913 * @phydev: phy_device structure to remove link mode from
2914 * @link_mode: Link mode to be removed
2915 *
2916 * Description: Some MACs don't support all link modes which the PHY
2917 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2918 * to remove a link mode.
2919 */
2920void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2921{
2922 linkmode_clear_bit(link_mode, phydev->supported);
2923 phy_advertise_supported(phydev);
2924}
2925EXPORT_SYMBOL(phy_remove_link_mode);
2926
2927static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2928{
2929 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2930 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2931 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2932 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2933}
2934
2935/**
2936 * phy_advertise_supported - Advertise all supported modes
2937 * @phydev: target phy_device struct
2938 *
2939 * Description: Called to advertise all supported modes, doesn't touch
2940 * pause mode advertising.
2941 */
2942void phy_advertise_supported(struct phy_device *phydev)
2943{
2944 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2945
2946 linkmode_copy(new, phydev->supported);
2947 phy_copy_pause_bits(new, phydev->advertising);
2948 linkmode_copy(phydev->advertising, new);
2949}
2950EXPORT_SYMBOL(phy_advertise_supported);
2951
2952/**
2953 * phy_advertise_eee_all - Advertise all supported EEE modes
2954 * @phydev: target phy_device struct
2955 *
2956 * Description: Per default phylib preserves the EEE advertising at the time of
2957 * phy probing, which might be a subset of the supported EEE modes. Use this
2958 * function when all supported EEE modes should be advertised. This does not
2959 * trigger auto-negotiation, so must be called before phy_start()/
2960 * phylink_start() which will start auto-negotiation.
2961 */
2962void phy_advertise_eee_all(struct phy_device *phydev)
2963{
2964 linkmode_copy(phydev->advertising_eee, phydev->supported_eee);
2965}
2966EXPORT_SYMBOL_GPL(phy_advertise_eee_all);
2967
2968/**
2969 * phy_support_eee - Set initial EEE policy configuration
2970 * @phydev: Target phy_device struct
2971 *
2972 * This function configures the initial policy for Energy Efficient Ethernet
2973 * (EEE) on the specified PHY device, influencing that EEE capabilities are
2974 * advertised before the link is established. It should be called during PHY
2975 * registration by the MAC driver and/or the PHY driver (for SmartEEE PHYs)
2976 * if MAC supports LPI or PHY is capable to compensate missing LPI functionality
2977 * of the MAC.
2978 *
2979 * The function sets default EEE policy parameters, including preparing the PHY
2980 * to advertise EEE capabilities based on hardware support.
2981 *
2982 * It also sets the expected configuration for Low Power Idle (LPI) in the MAC
2983 * driver. If the PHY framework determines that both local and remote
2984 * advertisements support EEE, and the negotiated link mode is compatible with
2985 * EEE, it will set enable_tx_lpi = true. The MAC driver is expected to act on
2986 * this setting by enabling the LPI timer if enable_tx_lpi is set.
2987 */
2988void phy_support_eee(struct phy_device *phydev)
2989{
2990 linkmode_copy(phydev->advertising_eee, phydev->supported_eee);
2991 phydev->eee_cfg.tx_lpi_enabled = true;
2992 phydev->eee_cfg.eee_enabled = true;
2993}
2994EXPORT_SYMBOL(phy_support_eee);
2995
2996/**
2997 * phy_support_sym_pause - Enable support of symmetrical pause
2998 * @phydev: target phy_device struct
2999 *
3000 * Description: Called by the MAC to indicate is supports symmetrical
3001 * Pause, but not asym pause.
3002 */
3003void phy_support_sym_pause(struct phy_device *phydev)
3004{
3005 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
3006 phy_copy_pause_bits(phydev->advertising, phydev->supported);
3007}
3008EXPORT_SYMBOL(phy_support_sym_pause);
3009
3010/**
3011 * phy_support_asym_pause - Enable support of asym pause
3012 * @phydev: target phy_device struct
3013 *
3014 * Description: Called by the MAC to indicate is supports Asym Pause.
3015 */
3016void phy_support_asym_pause(struct phy_device *phydev)
3017{
3018 phy_copy_pause_bits(phydev->advertising, phydev->supported);
3019}
3020EXPORT_SYMBOL(phy_support_asym_pause);
3021
3022/**
3023 * phy_set_sym_pause - Configure symmetric Pause
3024 * @phydev: target phy_device struct
3025 * @rx: Receiver Pause is supported
3026 * @tx: Transmit Pause is supported
3027 * @autoneg: Auto neg should be used
3028 *
3029 * Description: Configure advertised Pause support depending on if
3030 * receiver pause and pause auto neg is supported. Generally called
3031 * from the set_pauseparam .ndo.
3032 */
3033void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
3034 bool autoneg)
3035{
3036 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
3037
3038 if (rx && tx && autoneg)
3039 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3040 phydev->supported);
3041
3042 linkmode_copy(phydev->advertising, phydev->supported);
3043}
3044EXPORT_SYMBOL(phy_set_sym_pause);
3045
3046/**
3047 * phy_set_asym_pause - Configure Pause and Asym Pause
3048 * @phydev: target phy_device struct
3049 * @rx: Receiver Pause is supported
3050 * @tx: Transmit Pause is supported
3051 *
3052 * Description: Configure advertised Pause support depending on if
3053 * transmit and receiver pause is supported. If there has been a
3054 * change in adverting, trigger a new autoneg. Generally called from
3055 * the set_pauseparam .ndo.
3056 */
3057void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
3058{
3059 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
3060
3061 linkmode_copy(oldadv, phydev->advertising);
3062 linkmode_set_pause(phydev->advertising, tx, rx);
3063
3064 if (!linkmode_equal(oldadv, phydev->advertising) &&
3065 phydev->autoneg)
3066 phy_start_aneg(phydev);
3067}
3068EXPORT_SYMBOL(phy_set_asym_pause);
3069
3070/**
3071 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
3072 * @phydev: phy_device struct
3073 * @pp: requested pause configuration
3074 *
3075 * Description: Test if the PHY/MAC combination supports the Pause
3076 * configuration the user is requesting. Returns True if it is
3077 * supported, false otherwise.
3078 */
3079bool phy_validate_pause(struct phy_device *phydev,
3080 struct ethtool_pauseparam *pp)
3081{
3082 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3083 phydev->supported) && pp->rx_pause)
3084 return false;
3085
3086 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3087 phydev->supported) &&
3088 pp->rx_pause != pp->tx_pause)
3089 return false;
3090
3091 return true;
3092}
3093EXPORT_SYMBOL(phy_validate_pause);
3094
3095/**
3096 * phy_get_pause - resolve negotiated pause modes
3097 * @phydev: phy_device struct
3098 * @tx_pause: pointer to bool to indicate whether transmit pause should be
3099 * enabled.
3100 * @rx_pause: pointer to bool to indicate whether receive pause should be
3101 * enabled.
3102 *
3103 * Resolve and return the flow control modes according to the negotiation
3104 * result. This includes checking that we are operating in full duplex mode.
3105 * See linkmode_resolve_pause() for further details.
3106 */
3107void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
3108{
3109 if (phydev->duplex != DUPLEX_FULL) {
3110 *tx_pause = false;
3111 *rx_pause = false;
3112 return;
3113 }
3114
3115 return linkmode_resolve_pause(phydev->advertising,
3116 phydev->lp_advertising,
3117 tx_pause, rx_pause);
3118}
3119EXPORT_SYMBOL(phy_get_pause);
3120
3121#if IS_ENABLED(CONFIG_OF_MDIO)
3122static int phy_get_int_delay_property(struct device *dev, const char *name)
3123{
3124 s32 int_delay;
3125 int ret;
3126
3127 ret = device_property_read_u32(dev, name, &int_delay);
3128 if (ret)
3129 return ret;
3130
3131 return int_delay;
3132}
3133#else
3134static int phy_get_int_delay_property(struct device *dev, const char *name)
3135{
3136 return -EINVAL;
3137}
3138#endif
3139
3140/**
3141 * phy_get_internal_delay - returns the index of the internal delay
3142 * @phydev: phy_device struct
3143 * @dev: pointer to the devices device struct
3144 * @delay_values: array of delays the PHY supports
3145 * @size: the size of the delay array
3146 * @is_rx: boolean to indicate to get the rx internal delay
3147 *
3148 * Returns the index within the array of internal delay passed in.
3149 * If the device property is not present then the interface type is checked
3150 * if the interface defines use of internal delay then a 1 is returned otherwise
3151 * a 0 is returned.
3152 * The array must be in ascending order. If PHY does not have an ascending order
3153 * array then size = 0 and the value of the delay property is returned.
3154 * Return -EINVAL if the delay is invalid or cannot be found.
3155 */
3156s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
3157 const int *delay_values, int size, bool is_rx)
3158{
3159 s32 delay;
3160 int i;
3161
3162 if (is_rx) {
3163 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
3164 if (delay < 0 && size == 0) {
3165 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
3166 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
3167 return 1;
3168 else
3169 return 0;
3170 }
3171
3172 } else {
3173 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
3174 if (delay < 0 && size == 0) {
3175 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
3176 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
3177 return 1;
3178 else
3179 return 0;
3180 }
3181 }
3182
3183 if (delay < 0)
3184 return delay;
3185
3186 if (size == 0)
3187 return delay;
3188
3189 if (delay < delay_values[0] || delay > delay_values[size - 1]) {
3190 phydev_err(phydev, "Delay %d is out of range\n", delay);
3191 return -EINVAL;
3192 }
3193
3194 if (delay == delay_values[0])
3195 return 0;
3196
3197 for (i = 1; i < size; i++) {
3198 if (delay == delay_values[i])
3199 return i;
3200
3201 /* Find an approximate index by looking up the table */
3202 if (delay > delay_values[i - 1] &&
3203 delay < delay_values[i]) {
3204 if (delay - delay_values[i - 1] <
3205 delay_values[i] - delay)
3206 return i - 1;
3207 else
3208 return i;
3209 }
3210 }
3211
3212 phydev_err(phydev, "error finding internal delay index for %d\n",
3213 delay);
3214
3215 return -EINVAL;
3216}
3217EXPORT_SYMBOL(phy_get_internal_delay);
3218
3219static int phy_led_set_brightness(struct led_classdev *led_cdev,
3220 enum led_brightness value)
3221{
3222 struct phy_led *phyled = to_phy_led(led_cdev);
3223 struct phy_device *phydev = phyled->phydev;
3224 int err;
3225
3226 mutex_lock(&phydev->lock);
3227 err = phydev->drv->led_brightness_set(phydev, phyled->index, value);
3228 mutex_unlock(&phydev->lock);
3229
3230 return err;
3231}
3232
3233static int phy_led_blink_set(struct led_classdev *led_cdev,
3234 unsigned long *delay_on,
3235 unsigned long *delay_off)
3236{
3237 struct phy_led *phyled = to_phy_led(led_cdev);
3238 struct phy_device *phydev = phyled->phydev;
3239 int err;
3240
3241 mutex_lock(&phydev->lock);
3242 err = phydev->drv->led_blink_set(phydev, phyled->index,
3243 delay_on, delay_off);
3244 mutex_unlock(&phydev->lock);
3245
3246 return err;
3247}
3248
3249static __maybe_unused struct device *
3250phy_led_hw_control_get_device(struct led_classdev *led_cdev)
3251{
3252 struct phy_led *phyled = to_phy_led(led_cdev);
3253 struct phy_device *phydev = phyled->phydev;
3254
3255 if (phydev->attached_dev)
3256 return &phydev->attached_dev->dev;
3257 return NULL;
3258}
3259
3260static int __maybe_unused
3261phy_led_hw_control_get(struct led_classdev *led_cdev,
3262 unsigned long *rules)
3263{
3264 struct phy_led *phyled = to_phy_led(led_cdev);
3265 struct phy_device *phydev = phyled->phydev;
3266 int err;
3267
3268 mutex_lock(&phydev->lock);
3269 err = phydev->drv->led_hw_control_get(phydev, phyled->index, rules);
3270 mutex_unlock(&phydev->lock);
3271
3272 return err;
3273}
3274
3275static int __maybe_unused
3276phy_led_hw_control_set(struct led_classdev *led_cdev,
3277 unsigned long rules)
3278{
3279 struct phy_led *phyled = to_phy_led(led_cdev);
3280 struct phy_device *phydev = phyled->phydev;
3281 int err;
3282
3283 mutex_lock(&phydev->lock);
3284 err = phydev->drv->led_hw_control_set(phydev, phyled->index, rules);
3285 mutex_unlock(&phydev->lock);
3286
3287 return err;
3288}
3289
3290static __maybe_unused int phy_led_hw_is_supported(struct led_classdev *led_cdev,
3291 unsigned long rules)
3292{
3293 struct phy_led *phyled = to_phy_led(led_cdev);
3294 struct phy_device *phydev = phyled->phydev;
3295 int err;
3296
3297 mutex_lock(&phydev->lock);
3298 err = phydev->drv->led_hw_is_supported(phydev, phyled->index, rules);
3299 mutex_unlock(&phydev->lock);
3300
3301 return err;
3302}
3303
3304static void phy_leds_unregister(struct phy_device *phydev)
3305{
3306 struct phy_led *phyled, *tmp;
3307
3308 list_for_each_entry_safe(phyled, tmp, &phydev->leds, list) {
3309 led_classdev_unregister(&phyled->led_cdev);
3310 list_del(&phyled->list);
3311 }
3312}
3313
3314static int of_phy_led(struct phy_device *phydev,
3315 struct device_node *led)
3316{
3317 struct device *dev = &phydev->mdio.dev;
3318 struct led_init_data init_data = {};
3319 struct led_classdev *cdev;
3320 unsigned long modes = 0;
3321 struct phy_led *phyled;
3322 u32 index;
3323 int err;
3324
3325 phyled = devm_kzalloc(dev, sizeof(*phyled), GFP_KERNEL);
3326 if (!phyled)
3327 return -ENOMEM;
3328
3329 cdev = &phyled->led_cdev;
3330 phyled->phydev = phydev;
3331
3332 err = of_property_read_u32(led, "reg", &index);
3333 if (err)
3334 return err;
3335 if (index > U8_MAX)
3336 return -EINVAL;
3337
3338 if (of_property_read_bool(led, "active-high"))
3339 set_bit(PHY_LED_ACTIVE_HIGH, &modes);
3340 if (of_property_read_bool(led, "active-low"))
3341 set_bit(PHY_LED_ACTIVE_LOW, &modes);
3342 if (of_property_read_bool(led, "inactive-high-impedance"))
3343 set_bit(PHY_LED_INACTIVE_HIGH_IMPEDANCE, &modes);
3344
3345 if (WARN_ON(modes & BIT(PHY_LED_ACTIVE_LOW) &&
3346 modes & BIT(PHY_LED_ACTIVE_HIGH)))
3347 return -EINVAL;
3348
3349 if (modes) {
3350 /* Return error if asked to set polarity modes but not supported */
3351 if (!phydev->drv->led_polarity_set)
3352 return -EINVAL;
3353
3354 err = phydev->drv->led_polarity_set(phydev, index, modes);
3355 if (err)
3356 return err;
3357 }
3358
3359 phyled->index = index;
3360 if (phydev->drv->led_brightness_set)
3361 cdev->brightness_set_blocking = phy_led_set_brightness;
3362 if (phydev->drv->led_blink_set)
3363 cdev->blink_set = phy_led_blink_set;
3364
3365#ifdef CONFIG_LEDS_TRIGGERS
3366 if (phydev->drv->led_hw_is_supported &&
3367 phydev->drv->led_hw_control_set &&
3368 phydev->drv->led_hw_control_get) {
3369 cdev->hw_control_is_supported = phy_led_hw_is_supported;
3370 cdev->hw_control_set = phy_led_hw_control_set;
3371 cdev->hw_control_get = phy_led_hw_control_get;
3372 cdev->hw_control_trigger = "netdev";
3373 }
3374
3375 cdev->hw_control_get_device = phy_led_hw_control_get_device;
3376#endif
3377 cdev->max_brightness = 1;
3378 init_data.devicename = dev_name(&phydev->mdio.dev);
3379 init_data.fwnode = of_fwnode_handle(led);
3380 init_data.devname_mandatory = true;
3381
3382 err = led_classdev_register_ext(dev, cdev, &init_data);
3383 if (err)
3384 return err;
3385
3386 list_add(&phyled->list, &phydev->leds);
3387
3388 return 0;
3389}
3390
3391static int of_phy_leds(struct phy_device *phydev)
3392{
3393 struct device_node *node = phydev->mdio.dev.of_node;
3394 struct device_node *leds;
3395 int err;
3396
3397 if (!IS_ENABLED(CONFIG_OF_MDIO))
3398 return 0;
3399
3400 if (!node)
3401 return 0;
3402
3403 leds = of_get_child_by_name(node, "leds");
3404 if (!leds)
3405 return 0;
3406
3407 /* Check if the PHY driver have at least an OP to
3408 * set the LEDs.
3409 */
3410 if (!(phydev->drv->led_brightness_set ||
3411 phydev->drv->led_blink_set ||
3412 phydev->drv->led_hw_control_set)) {
3413 phydev_dbg(phydev, "ignoring leds node defined with no PHY driver support\n");
3414 goto exit;
3415 }
3416
3417 for_each_available_child_of_node_scoped(leds, led) {
3418 err = of_phy_led(phydev, led);
3419 if (err) {
3420 of_node_put(leds);
3421 phy_leds_unregister(phydev);
3422 return err;
3423 }
3424 }
3425
3426exit:
3427 of_node_put(leds);
3428 return 0;
3429}
3430
3431/**
3432 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device
3433 * @fwnode: pointer to the mdio_device's fwnode
3434 *
3435 * If successful, returns a pointer to the mdio_device with the embedded
3436 * struct device refcount incremented by one, or NULL on failure.
3437 * The caller should call put_device() on the mdio_device after its use.
3438 */
3439struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
3440{
3441 struct device *d;
3442
3443 if (!fwnode)
3444 return NULL;
3445
3446 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode);
3447 if (!d)
3448 return NULL;
3449
3450 return to_mdio_device(d);
3451}
3452EXPORT_SYMBOL(fwnode_mdio_find_device);
3453
3454/**
3455 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.
3456 *
3457 * @phy_fwnode: Pointer to the phy's fwnode.
3458 *
3459 * If successful, returns a pointer to the phy_device with the embedded
3460 * struct device refcount incremented by one, or NULL on failure.
3461 */
3462struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
3463{
3464 struct mdio_device *mdiodev;
3465
3466 mdiodev = fwnode_mdio_find_device(phy_fwnode);
3467 if (!mdiodev)
3468 return NULL;
3469
3470 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
3471 return to_phy_device(&mdiodev->dev);
3472
3473 put_device(&mdiodev->dev);
3474
3475 return NULL;
3476}
3477EXPORT_SYMBOL(fwnode_phy_find_device);
3478
3479/**
3480 * device_phy_find_device - For the given device, get the phy_device
3481 * @dev: Pointer to the given device
3482 *
3483 * Refer return conditions of fwnode_phy_find_device().
3484 */
3485struct phy_device *device_phy_find_device(struct device *dev)
3486{
3487 return fwnode_phy_find_device(dev_fwnode(dev));
3488}
3489EXPORT_SYMBOL_GPL(device_phy_find_device);
3490
3491/**
3492 * fwnode_get_phy_node - Get the phy_node using the named reference.
3493 * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
3494 *
3495 * Refer return conditions of fwnode_find_reference().
3496 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"
3497 * and "phy-device" are not supported in ACPI. DT supports all the three
3498 * named references to the phy node.
3499 */
3500struct fwnode_handle *fwnode_get_phy_node(const struct fwnode_handle *fwnode)
3501{
3502 struct fwnode_handle *phy_node;
3503
3504 /* Only phy-handle is used for ACPI */
3505 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
3506 if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
3507 return phy_node;
3508 phy_node = fwnode_find_reference(fwnode, "phy", 0);
3509 if (IS_ERR(phy_node))
3510 phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
3511 return phy_node;
3512}
3513EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
3514
3515/**
3516 * phy_probe - probe and init a PHY device
3517 * @dev: device to probe and init
3518 *
3519 * Take care of setting up the phy_device structure, set the state to READY.
3520 */
3521static int phy_probe(struct device *dev)
3522{
3523 struct phy_device *phydev = to_phy_device(dev);
3524 struct device_driver *drv = phydev->mdio.dev.driver;
3525 struct phy_driver *phydrv = to_phy_driver(drv);
3526 int err = 0;
3527
3528 phydev->drv = phydrv;
3529
3530 /* Disable the interrupt if the PHY doesn't support it
3531 * but the interrupt is still a valid one
3532 */
3533 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
3534 phydev->irq = PHY_POLL;
3535
3536 if (phydrv->flags & PHY_IS_INTERNAL)
3537 phydev->is_internal = true;
3538
3539 /* Deassert the reset signal */
3540 phy_device_reset(phydev, 0);
3541
3542 if (phydev->drv->probe) {
3543 err = phydev->drv->probe(phydev);
3544 if (err)
3545 goto out;
3546 }
3547
3548 phy_disable_interrupts(phydev);
3549
3550 /* Start out supporting everything. Eventually,
3551 * a controller will attach, and may modify one
3552 * or both of these values
3553 */
3554 if (phydrv->features) {
3555 linkmode_copy(phydev->supported, phydrv->features);
3556 genphy_c45_read_eee_abilities(phydev);
3557 }
3558 else if (phydrv->get_features)
3559 err = phydrv->get_features(phydev);
3560 else if (phydev->is_c45)
3561 err = genphy_c45_pma_read_abilities(phydev);
3562 else
3563 err = genphy_read_abilities(phydev);
3564
3565 if (err)
3566 goto out;
3567
3568 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
3569 phydev->supported))
3570 phydev->autoneg = 0;
3571
3572 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
3573 phydev->supported))
3574 phydev->is_gigabit_capable = 1;
3575 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
3576 phydev->supported))
3577 phydev->is_gigabit_capable = 1;
3578
3579 of_set_phy_supported(phydev);
3580 phy_advertise_supported(phydev);
3581
3582 /* Get PHY default EEE advertising modes and handle them as potentially
3583 * safe initial configuration.
3584 */
3585 err = genphy_c45_read_eee_adv(phydev, phydev->advertising_eee);
3586 if (err)
3587 goto out;
3588
3589 /* There is no "enabled" flag. If PHY is advertising, assume it is
3590 * kind of enabled.
3591 */
3592 phydev->eee_cfg.eee_enabled = !linkmode_empty(phydev->advertising_eee);
3593
3594 /* Some PHYs may advertise, by default, not support EEE modes. So,
3595 * we need to clean them.
3596 */
3597 if (phydev->eee_cfg.eee_enabled)
3598 linkmode_and(phydev->advertising_eee, phydev->supported_eee,
3599 phydev->advertising_eee);
3600
3601 /* Get the EEE modes we want to prohibit. We will ask
3602 * the PHY stop advertising these mode later on
3603 */
3604 of_set_phy_eee_broken(phydev);
3605
3606 /* Get master/slave strap overrides */
3607 of_set_phy_timing_role(phydev);
3608
3609 /* The Pause Frame bits indicate that the PHY can support passing
3610 * pause frames. During autonegotiation, the PHYs will determine if
3611 * they should allow pause frames to pass. The MAC driver should then
3612 * use that result to determine whether to enable flow control via
3613 * pause frames.
3614 *
3615 * Normally, PHY drivers should not set the Pause bits, and instead
3616 * allow phylib to do that. However, there may be some situations
3617 * (e.g. hardware erratum) where the driver wants to set only one
3618 * of these bits.
3619 */
3620 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
3621 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
3622 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3623 phydev->supported);
3624 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3625 phydev->supported);
3626 }
3627
3628 /* Set the state to READY by default */
3629 phydev->state = PHY_READY;
3630
3631 /* Get the LEDs from the device tree, and instantiate standard
3632 * LEDs for them.
3633 */
3634 if (IS_ENABLED(CONFIG_PHYLIB_LEDS))
3635 err = of_phy_leds(phydev);
3636
3637out:
3638 /* Re-assert the reset signal on error */
3639 if (err)
3640 phy_device_reset(phydev, 1);
3641
3642 return err;
3643}
3644
3645static int phy_remove(struct device *dev)
3646{
3647 struct phy_device *phydev = to_phy_device(dev);
3648
3649 cancel_delayed_work_sync(&phydev->state_queue);
3650
3651 if (IS_ENABLED(CONFIG_PHYLIB_LEDS))
3652 phy_leds_unregister(phydev);
3653
3654 phydev->state = PHY_DOWN;
3655
3656 sfp_bus_del_upstream(phydev->sfp_bus);
3657 phydev->sfp_bus = NULL;
3658
3659 if (phydev->drv && phydev->drv->remove)
3660 phydev->drv->remove(phydev);
3661
3662 /* Assert the reset signal */
3663 phy_device_reset(phydev, 1);
3664
3665 phydev->drv = NULL;
3666
3667 return 0;
3668}
3669
3670/**
3671 * phy_driver_register - register a phy_driver with the PHY layer
3672 * @new_driver: new phy_driver to register
3673 * @owner: module owning this PHY
3674 */
3675int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
3676{
3677 int retval;
3678
3679 /* Either the features are hard coded, or dynamically
3680 * determined. It cannot be both.
3681 */
3682 if (WARN_ON(new_driver->features && new_driver->get_features)) {
3683 pr_err("%s: features and get_features must not both be set\n",
3684 new_driver->name);
3685 return -EINVAL;
3686 }
3687
3688 /* PHYLIB device drivers must not match using a DT compatible table
3689 * as this bypasses our checks that the mdiodev that is being matched
3690 * is backed by a struct phy_device. If such a case happens, we will
3691 * make out-of-bounds accesses and lockup in phydev->lock.
3692 */
3693 if (WARN(new_driver->mdiodrv.driver.of_match_table,
3694 "%s: driver must not provide a DT match table\n",
3695 new_driver->name))
3696 return -EINVAL;
3697
3698 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
3699 new_driver->mdiodrv.driver.name = new_driver->name;
3700 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
3701 new_driver->mdiodrv.driver.probe = phy_probe;
3702 new_driver->mdiodrv.driver.remove = phy_remove;
3703 new_driver->mdiodrv.driver.owner = owner;
3704 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
3705
3706 retval = driver_register(&new_driver->mdiodrv.driver);
3707 if (retval) {
3708 pr_err("%s: Error %d in registering driver\n",
3709 new_driver->name, retval);
3710
3711 return retval;
3712 }
3713
3714 pr_debug("%s: Registered new driver\n", new_driver->name);
3715
3716 return 0;
3717}
3718EXPORT_SYMBOL(phy_driver_register);
3719
3720int phy_drivers_register(struct phy_driver *new_driver, int n,
3721 struct module *owner)
3722{
3723 int i, ret = 0;
3724
3725 for (i = 0; i < n; i++) {
3726 ret = phy_driver_register(new_driver + i, owner);
3727 if (ret) {
3728 while (i-- > 0)
3729 phy_driver_unregister(new_driver + i);
3730 break;
3731 }
3732 }
3733 return ret;
3734}
3735EXPORT_SYMBOL(phy_drivers_register);
3736
3737void phy_driver_unregister(struct phy_driver *drv)
3738{
3739 driver_unregister(&drv->mdiodrv.driver);
3740}
3741EXPORT_SYMBOL(phy_driver_unregister);
3742
3743void phy_drivers_unregister(struct phy_driver *drv, int n)
3744{
3745 int i;
3746
3747 for (i = 0; i < n; i++)
3748 phy_driver_unregister(drv + i);
3749}
3750EXPORT_SYMBOL(phy_drivers_unregister);
3751
3752static struct phy_driver genphy_driver = {
3753 .phy_id = 0xffffffff,
3754 .phy_id_mask = 0xffffffff,
3755 .name = "Generic PHY",
3756 .get_features = genphy_read_abilities,
3757 .suspend = genphy_suspend,
3758 .resume = genphy_resume,
3759 .set_loopback = genphy_loopback,
3760};
3761
3762static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
3763 .get_sset_count = phy_ethtool_get_sset_count,
3764 .get_strings = phy_ethtool_get_strings,
3765 .get_stats = phy_ethtool_get_stats,
3766 .get_plca_cfg = phy_ethtool_get_plca_cfg,
3767 .set_plca_cfg = phy_ethtool_set_plca_cfg,
3768 .get_plca_status = phy_ethtool_get_plca_status,
3769 .start_cable_test = phy_start_cable_test,
3770 .start_cable_test_tdr = phy_start_cable_test_tdr,
3771};
3772
3773static const struct phylib_stubs __phylib_stubs = {
3774 .hwtstamp_get = __phy_hwtstamp_get,
3775 .hwtstamp_set = __phy_hwtstamp_set,
3776 .get_phy_stats = __phy_ethtool_get_phy_stats,
3777 .get_link_ext_stats = __phy_ethtool_get_link_ext_stats,
3778};
3779
3780static void phylib_register_stubs(void)
3781{
3782 phylib_stubs = &__phylib_stubs;
3783}
3784
3785static void phylib_unregister_stubs(void)
3786{
3787 phylib_stubs = NULL;
3788}
3789
3790static int __init phy_init(void)
3791{
3792 int rc;
3793
3794 rtnl_lock();
3795 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
3796 phylib_register_stubs();
3797 rtnl_unlock();
3798
3799 rc = mdio_bus_init();
3800 if (rc)
3801 goto err_ethtool_phy_ops;
3802
3803 features_init();
3804
3805 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
3806 if (rc)
3807 goto err_mdio_bus;
3808
3809 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
3810 if (rc)
3811 goto err_c45;
3812
3813 return 0;
3814
3815err_c45:
3816 phy_driver_unregister(&genphy_c45_driver);
3817err_mdio_bus:
3818 mdio_bus_exit();
3819err_ethtool_phy_ops:
3820 rtnl_lock();
3821 phylib_unregister_stubs();
3822 ethtool_set_ethtool_phy_ops(NULL);
3823 rtnl_unlock();
3824
3825 return rc;
3826}
3827
3828static void __exit phy_exit(void)
3829{
3830 phy_driver_unregister(&genphy_c45_driver);
3831 phy_driver_unregister(&genphy_driver);
3832 mdio_bus_exit();
3833 rtnl_lock();
3834 phylib_unregister_stubs();
3835 ethtool_set_ethtool_phy_ops(NULL);
3836 rtnl_unlock();
3837}
3838
3839subsys_initcall(phy_init);
3840module_exit(phy_exit);
1// SPDX-License-Identifier: GPL-2.0+
2/* Framework for finding and configuring PHYs.
3 * Also contains generic PHY driver
4 *
5 * Author: Andy Fleming
6 *
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/acpi.h>
13#include <linux/bitmap.h>
14#include <linux/delay.h>
15#include <linux/errno.h>
16#include <linux/etherdevice.h>
17#include <linux/ethtool.h>
18#include <linux/init.h>
19#include <linux/interrupt.h>
20#include <linux/io.h>
21#include <linux/kernel.h>
22#include <linux/list.h>
23#include <linux/mdio.h>
24#include <linux/mii.h>
25#include <linux/mm.h>
26#include <linux/module.h>
27#include <linux/of.h>
28#include <linux/netdevice.h>
29#include <linux/phy.h>
30#include <linux/phylib_stubs.h>
31#include <linux/phy_led_triggers.h>
32#include <linux/pse-pd/pse.h>
33#include <linux/property.h>
34#include <linux/rtnetlink.h>
35#include <linux/sfp.h>
36#include <linux/skbuff.h>
37#include <linux/slab.h>
38#include <linux/string.h>
39#include <linux/uaccess.h>
40#include <linux/unistd.h>
41
42MODULE_DESCRIPTION("PHY library");
43MODULE_AUTHOR("Andy Fleming");
44MODULE_LICENSE("GPL");
45
46__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
47EXPORT_SYMBOL_GPL(phy_basic_features);
48
49__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
50EXPORT_SYMBOL_GPL(phy_basic_t1_features);
51
52__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1s_p2mp_features) __ro_after_init;
53EXPORT_SYMBOL_GPL(phy_basic_t1s_p2mp_features);
54
55__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
56EXPORT_SYMBOL_GPL(phy_gbit_features);
57
58__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
59EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
60
61__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
62EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
63
64__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
65EXPORT_SYMBOL_GPL(phy_10gbit_features);
66
67__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
68EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
69
70const int phy_basic_ports_array[3] = {
71 ETHTOOL_LINK_MODE_Autoneg_BIT,
72 ETHTOOL_LINK_MODE_TP_BIT,
73 ETHTOOL_LINK_MODE_MII_BIT,
74};
75EXPORT_SYMBOL_GPL(phy_basic_ports_array);
76
77const int phy_fibre_port_array[1] = {
78 ETHTOOL_LINK_MODE_FIBRE_BIT,
79};
80EXPORT_SYMBOL_GPL(phy_fibre_port_array);
81
82const int phy_all_ports_features_array[7] = {
83 ETHTOOL_LINK_MODE_Autoneg_BIT,
84 ETHTOOL_LINK_MODE_TP_BIT,
85 ETHTOOL_LINK_MODE_MII_BIT,
86 ETHTOOL_LINK_MODE_FIBRE_BIT,
87 ETHTOOL_LINK_MODE_AUI_BIT,
88 ETHTOOL_LINK_MODE_BNC_BIT,
89 ETHTOOL_LINK_MODE_Backplane_BIT,
90};
91EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
92
93const int phy_10_100_features_array[4] = {
94 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
95 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
96 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
97 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
98};
99EXPORT_SYMBOL_GPL(phy_10_100_features_array);
100
101const int phy_basic_t1_features_array[3] = {
102 ETHTOOL_LINK_MODE_TP_BIT,
103 ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
104 ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
105};
106EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
107
108const int phy_basic_t1s_p2mp_features_array[2] = {
109 ETHTOOL_LINK_MODE_TP_BIT,
110 ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half_BIT,
111};
112EXPORT_SYMBOL_GPL(phy_basic_t1s_p2mp_features_array);
113
114const int phy_gbit_features_array[2] = {
115 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
116 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
117};
118EXPORT_SYMBOL_GPL(phy_gbit_features_array);
119
120const int phy_10gbit_features_array[1] = {
121 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
122};
123EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
124
125static const int phy_10gbit_fec_features_array[1] = {
126 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
127};
128
129__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
130EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
131
132static const int phy_10gbit_full_features_array[] = {
133 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
134 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
135 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
136 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
137};
138
139static const int phy_eee_cap1_features_array[] = {
140 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
141 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
142 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
143 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
144 ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
145 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
146};
147
148__ETHTOOL_DECLARE_LINK_MODE_MASK(phy_eee_cap1_features) __ro_after_init;
149EXPORT_SYMBOL_GPL(phy_eee_cap1_features);
150
151static void features_init(void)
152{
153 /* 10/100 half/full*/
154 linkmode_set_bit_array(phy_basic_ports_array,
155 ARRAY_SIZE(phy_basic_ports_array),
156 phy_basic_features);
157 linkmode_set_bit_array(phy_10_100_features_array,
158 ARRAY_SIZE(phy_10_100_features_array),
159 phy_basic_features);
160
161 /* 100 full, TP */
162 linkmode_set_bit_array(phy_basic_t1_features_array,
163 ARRAY_SIZE(phy_basic_t1_features_array),
164 phy_basic_t1_features);
165
166 /* 10 half, P2MP, TP */
167 linkmode_set_bit_array(phy_basic_t1s_p2mp_features_array,
168 ARRAY_SIZE(phy_basic_t1s_p2mp_features_array),
169 phy_basic_t1s_p2mp_features);
170
171 /* 10/100 half/full + 1000 half/full */
172 linkmode_set_bit_array(phy_basic_ports_array,
173 ARRAY_SIZE(phy_basic_ports_array),
174 phy_gbit_features);
175 linkmode_set_bit_array(phy_10_100_features_array,
176 ARRAY_SIZE(phy_10_100_features_array),
177 phy_gbit_features);
178 linkmode_set_bit_array(phy_gbit_features_array,
179 ARRAY_SIZE(phy_gbit_features_array),
180 phy_gbit_features);
181
182 /* 10/100 half/full + 1000 half/full + fibre*/
183 linkmode_set_bit_array(phy_basic_ports_array,
184 ARRAY_SIZE(phy_basic_ports_array),
185 phy_gbit_fibre_features);
186 linkmode_set_bit_array(phy_10_100_features_array,
187 ARRAY_SIZE(phy_10_100_features_array),
188 phy_gbit_fibre_features);
189 linkmode_set_bit_array(phy_gbit_features_array,
190 ARRAY_SIZE(phy_gbit_features_array),
191 phy_gbit_fibre_features);
192 linkmode_set_bit_array(phy_fibre_port_array,
193 ARRAY_SIZE(phy_fibre_port_array),
194 phy_gbit_fibre_features);
195
196 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
197 linkmode_set_bit_array(phy_all_ports_features_array,
198 ARRAY_SIZE(phy_all_ports_features_array),
199 phy_gbit_all_ports_features);
200 linkmode_set_bit_array(phy_10_100_features_array,
201 ARRAY_SIZE(phy_10_100_features_array),
202 phy_gbit_all_ports_features);
203 linkmode_set_bit_array(phy_gbit_features_array,
204 ARRAY_SIZE(phy_gbit_features_array),
205 phy_gbit_all_ports_features);
206
207 /* 10/100 half/full + 1000 half/full + 10G full*/
208 linkmode_set_bit_array(phy_all_ports_features_array,
209 ARRAY_SIZE(phy_all_ports_features_array),
210 phy_10gbit_features);
211 linkmode_set_bit_array(phy_10_100_features_array,
212 ARRAY_SIZE(phy_10_100_features_array),
213 phy_10gbit_features);
214 linkmode_set_bit_array(phy_gbit_features_array,
215 ARRAY_SIZE(phy_gbit_features_array),
216 phy_10gbit_features);
217 linkmode_set_bit_array(phy_10gbit_features_array,
218 ARRAY_SIZE(phy_10gbit_features_array),
219 phy_10gbit_features);
220
221 /* 10/100/1000/10G full */
222 linkmode_set_bit_array(phy_all_ports_features_array,
223 ARRAY_SIZE(phy_all_ports_features_array),
224 phy_10gbit_full_features);
225 linkmode_set_bit_array(phy_10gbit_full_features_array,
226 ARRAY_SIZE(phy_10gbit_full_features_array),
227 phy_10gbit_full_features);
228 /* 10G FEC only */
229 linkmode_set_bit_array(phy_10gbit_fec_features_array,
230 ARRAY_SIZE(phy_10gbit_fec_features_array),
231 phy_10gbit_fec_features);
232 linkmode_set_bit_array(phy_eee_cap1_features_array,
233 ARRAY_SIZE(phy_eee_cap1_features_array),
234 phy_eee_cap1_features);
235
236}
237
238void phy_device_free(struct phy_device *phydev)
239{
240 put_device(&phydev->mdio.dev);
241}
242EXPORT_SYMBOL(phy_device_free);
243
244static void phy_mdio_device_free(struct mdio_device *mdiodev)
245{
246 struct phy_device *phydev;
247
248 phydev = container_of(mdiodev, struct phy_device, mdio);
249 phy_device_free(phydev);
250}
251
252static void phy_device_release(struct device *dev)
253{
254 fwnode_handle_put(dev->fwnode);
255 kfree(to_phy_device(dev));
256}
257
258static void phy_mdio_device_remove(struct mdio_device *mdiodev)
259{
260 struct phy_device *phydev;
261
262 phydev = container_of(mdiodev, struct phy_device, mdio);
263 phy_device_remove(phydev);
264}
265
266static struct phy_driver genphy_driver;
267
268static LIST_HEAD(phy_fixup_list);
269static DEFINE_MUTEX(phy_fixup_lock);
270
271static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
272{
273 struct device_driver *drv = phydev->mdio.dev.driver;
274 struct phy_driver *phydrv = to_phy_driver(drv);
275 struct net_device *netdev = phydev->attached_dev;
276
277 if (!drv || !phydrv->suspend)
278 return false;
279
280 /* PHY not attached? May suspend if the PHY has not already been
281 * suspended as part of a prior call to phy_disconnect() ->
282 * phy_detach() -> phy_suspend() because the parent netdev might be the
283 * MDIO bus driver and clock gated at this point.
284 */
285 if (!netdev)
286 goto out;
287
288 if (netdev->wol_enabled)
289 return false;
290
291 /* As long as not all affected network drivers support the
292 * wol_enabled flag, let's check for hints that WoL is enabled.
293 * Don't suspend PHY if the attached netdev parent may wake up.
294 * The parent may point to a PCI device, as in tg3 driver.
295 */
296 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
297 return false;
298
299 /* Also don't suspend PHY if the netdev itself may wakeup. This
300 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
301 * e.g. SoC devices.
302 */
303 if (device_may_wakeup(&netdev->dev))
304 return false;
305
306out:
307 return !phydev->suspended;
308}
309
310static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
311{
312 struct phy_device *phydev = to_phy_device(dev);
313
314 if (phydev->mac_managed_pm)
315 return 0;
316
317 /* Wakeup interrupts may occur during the system sleep transition when
318 * the PHY is inaccessible. Set flag to postpone handling until the PHY
319 * has resumed. Wait for concurrent interrupt handler to complete.
320 */
321 if (phy_interrupt_is_valid(phydev)) {
322 phydev->irq_suspended = 1;
323 synchronize_irq(phydev->irq);
324 }
325
326 /* We must stop the state machine manually, otherwise it stops out of
327 * control, possibly with the phydev->lock held. Upon resume, netdev
328 * may call phy routines that try to grab the same lock, and that may
329 * lead to a deadlock.
330 */
331 if (phydev->attached_dev && phydev->adjust_link)
332 phy_stop_machine(phydev);
333
334 if (!mdio_bus_phy_may_suspend(phydev))
335 return 0;
336
337 phydev->suspended_by_mdio_bus = 1;
338
339 return phy_suspend(phydev);
340}
341
342static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
343{
344 struct phy_device *phydev = to_phy_device(dev);
345 int ret;
346
347 if (phydev->mac_managed_pm)
348 return 0;
349
350 if (!phydev->suspended_by_mdio_bus)
351 goto no_resume;
352
353 phydev->suspended_by_mdio_bus = 0;
354
355 /* If we managed to get here with the PHY state machine in a state
356 * neither PHY_HALTED, PHY_READY nor PHY_UP, this is an indication
357 * that something went wrong and we should most likely be using
358 * MAC managed PM, but we are not.
359 */
360 WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY &&
361 phydev->state != PHY_UP);
362
363 ret = phy_init_hw(phydev);
364 if (ret < 0)
365 return ret;
366
367 ret = phy_resume(phydev);
368 if (ret < 0)
369 return ret;
370no_resume:
371 if (phy_interrupt_is_valid(phydev)) {
372 phydev->irq_suspended = 0;
373 synchronize_irq(phydev->irq);
374
375 /* Rerun interrupts which were postponed by phy_interrupt()
376 * because they occurred during the system sleep transition.
377 */
378 if (phydev->irq_rerun) {
379 phydev->irq_rerun = 0;
380 enable_irq(phydev->irq);
381 irq_wake_thread(phydev->irq, phydev);
382 }
383 }
384
385 if (phydev->attached_dev && phydev->adjust_link)
386 phy_start_machine(phydev);
387
388 return 0;
389}
390
391static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend,
392 mdio_bus_phy_resume);
393
394/**
395 * phy_register_fixup - creates a new phy_fixup and adds it to the list
396 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
397 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
398 * It can also be PHY_ANY_UID
399 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
400 * comparison
401 * @run: The actual code to be run when a matching PHY is found
402 */
403int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
404 int (*run)(struct phy_device *))
405{
406 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
407
408 if (!fixup)
409 return -ENOMEM;
410
411 strscpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
412 fixup->phy_uid = phy_uid;
413 fixup->phy_uid_mask = phy_uid_mask;
414 fixup->run = run;
415
416 mutex_lock(&phy_fixup_lock);
417 list_add_tail(&fixup->list, &phy_fixup_list);
418 mutex_unlock(&phy_fixup_lock);
419
420 return 0;
421}
422EXPORT_SYMBOL(phy_register_fixup);
423
424/* Registers a fixup to be run on any PHY with the UID in phy_uid */
425int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
426 int (*run)(struct phy_device *))
427{
428 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
429}
430EXPORT_SYMBOL(phy_register_fixup_for_uid);
431
432/* Registers a fixup to be run on the PHY with id string bus_id */
433int phy_register_fixup_for_id(const char *bus_id,
434 int (*run)(struct phy_device *))
435{
436 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
437}
438EXPORT_SYMBOL(phy_register_fixup_for_id);
439
440/**
441 * phy_unregister_fixup - remove a phy_fixup from the list
442 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
443 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
444 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
445 */
446int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
447{
448 struct list_head *pos, *n;
449 struct phy_fixup *fixup;
450 int ret;
451
452 ret = -ENODEV;
453
454 mutex_lock(&phy_fixup_lock);
455 list_for_each_safe(pos, n, &phy_fixup_list) {
456 fixup = list_entry(pos, struct phy_fixup, list);
457
458 if ((!strcmp(fixup->bus_id, bus_id)) &&
459 phy_id_compare(fixup->phy_uid, phy_uid, phy_uid_mask)) {
460 list_del(&fixup->list);
461 kfree(fixup);
462 ret = 0;
463 break;
464 }
465 }
466 mutex_unlock(&phy_fixup_lock);
467
468 return ret;
469}
470EXPORT_SYMBOL(phy_unregister_fixup);
471
472/* Unregisters a fixup of any PHY with the UID in phy_uid */
473int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
474{
475 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
476}
477EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
478
479/* Unregisters a fixup of the PHY with id string bus_id */
480int phy_unregister_fixup_for_id(const char *bus_id)
481{
482 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
483}
484EXPORT_SYMBOL(phy_unregister_fixup_for_id);
485
486/* Returns 1 if fixup matches phydev in bus_id and phy_uid.
487 * Fixups can be set to match any in one or more fields.
488 */
489static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
490{
491 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
492 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
493 return 0;
494
495 if (!phy_id_compare(phydev->phy_id, fixup->phy_uid,
496 fixup->phy_uid_mask))
497 if (fixup->phy_uid != PHY_ANY_UID)
498 return 0;
499
500 return 1;
501}
502
503/* Runs any matching fixups for this phydev */
504static int phy_scan_fixups(struct phy_device *phydev)
505{
506 struct phy_fixup *fixup;
507
508 mutex_lock(&phy_fixup_lock);
509 list_for_each_entry(fixup, &phy_fixup_list, list) {
510 if (phy_needs_fixup(phydev, fixup)) {
511 int err = fixup->run(phydev);
512
513 if (err < 0) {
514 mutex_unlock(&phy_fixup_lock);
515 return err;
516 }
517 phydev->has_fixups = true;
518 }
519 }
520 mutex_unlock(&phy_fixup_lock);
521
522 return 0;
523}
524
525static int phy_bus_match(struct device *dev, struct device_driver *drv)
526{
527 struct phy_device *phydev = to_phy_device(dev);
528 struct phy_driver *phydrv = to_phy_driver(drv);
529 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
530 int i;
531
532 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
533 return 0;
534
535 if (phydrv->match_phy_device)
536 return phydrv->match_phy_device(phydev);
537
538 if (phydev->is_c45) {
539 for (i = 1; i < num_ids; i++) {
540 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
541 continue;
542
543 if (phy_id_compare(phydev->c45_ids.device_ids[i],
544 phydrv->phy_id, phydrv->phy_id_mask))
545 return 1;
546 }
547 return 0;
548 } else {
549 return phy_id_compare(phydev->phy_id, phydrv->phy_id,
550 phydrv->phy_id_mask);
551 }
552}
553
554static ssize_t
555phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
556{
557 struct phy_device *phydev = to_phy_device(dev);
558
559 return sysfs_emit(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
560}
561static DEVICE_ATTR_RO(phy_id);
562
563static ssize_t
564phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
565{
566 struct phy_device *phydev = to_phy_device(dev);
567 const char *mode = NULL;
568
569 if (phy_is_internal(phydev))
570 mode = "internal";
571 else
572 mode = phy_modes(phydev->interface);
573
574 return sysfs_emit(buf, "%s\n", mode);
575}
576static DEVICE_ATTR_RO(phy_interface);
577
578static ssize_t
579phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
580 char *buf)
581{
582 struct phy_device *phydev = to_phy_device(dev);
583
584 return sysfs_emit(buf, "%d\n", phydev->has_fixups);
585}
586static DEVICE_ATTR_RO(phy_has_fixups);
587
588static ssize_t phy_dev_flags_show(struct device *dev,
589 struct device_attribute *attr,
590 char *buf)
591{
592 struct phy_device *phydev = to_phy_device(dev);
593
594 return sysfs_emit(buf, "0x%08x\n", phydev->dev_flags);
595}
596static DEVICE_ATTR_RO(phy_dev_flags);
597
598static struct attribute *phy_dev_attrs[] = {
599 &dev_attr_phy_id.attr,
600 &dev_attr_phy_interface.attr,
601 &dev_attr_phy_has_fixups.attr,
602 &dev_attr_phy_dev_flags.attr,
603 NULL,
604};
605ATTRIBUTE_GROUPS(phy_dev);
606
607static const struct device_type mdio_bus_phy_type = {
608 .name = "PHY",
609 .groups = phy_dev_groups,
610 .release = phy_device_release,
611 .pm = pm_ptr(&mdio_bus_phy_pm_ops),
612};
613
614static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
615{
616 int ret;
617
618 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
619 MDIO_ID_ARGS(phy_id));
620 /* We only check for failures in executing the usermode binary,
621 * not whether a PHY driver module exists for the PHY ID.
622 * Accept -ENOENT because this may occur in case no initramfs exists,
623 * then modprobe isn't available.
624 */
625 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
626 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
627 ret, (unsigned long)phy_id);
628 return ret;
629 }
630
631 return 0;
632}
633
634struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
635 bool is_c45,
636 struct phy_c45_device_ids *c45_ids)
637{
638 struct phy_device *dev;
639 struct mdio_device *mdiodev;
640 int ret = 0;
641
642 /* We allocate the device, and initialize the default values */
643 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
644 if (!dev)
645 return ERR_PTR(-ENOMEM);
646
647 mdiodev = &dev->mdio;
648 mdiodev->dev.parent = &bus->dev;
649 mdiodev->dev.bus = &mdio_bus_type;
650 mdiodev->dev.type = &mdio_bus_phy_type;
651 mdiodev->bus = bus;
652 mdiodev->bus_match = phy_bus_match;
653 mdiodev->addr = addr;
654 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
655 mdiodev->device_free = phy_mdio_device_free;
656 mdiodev->device_remove = phy_mdio_device_remove;
657 mdiodev->reset_state = -1;
658
659 dev->speed = SPEED_UNKNOWN;
660 dev->duplex = DUPLEX_UNKNOWN;
661 dev->pause = 0;
662 dev->asym_pause = 0;
663 dev->link = 0;
664 dev->port = PORT_TP;
665 dev->interface = PHY_INTERFACE_MODE_GMII;
666
667 dev->autoneg = AUTONEG_ENABLE;
668
669 dev->pma_extable = -ENODATA;
670 dev->is_c45 = is_c45;
671 dev->phy_id = phy_id;
672 if (c45_ids)
673 dev->c45_ids = *c45_ids;
674 dev->irq = bus->irq[addr];
675
676 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
677 device_initialize(&mdiodev->dev);
678
679 dev->state = PHY_DOWN;
680 INIT_LIST_HEAD(&dev->leds);
681
682 mutex_init(&dev->lock);
683 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
684
685 /* Request the appropriate module unconditionally; don't
686 * bother trying to do so only if it isn't already loaded,
687 * because that gets complicated. A hotplug event would have
688 * done an unconditional modprobe anyway.
689 * We don't do normal hotplug because it won't work for MDIO
690 * -- because it relies on the device staying around for long
691 * enough for the driver to get loaded. With MDIO, the NIC
692 * driver will get bored and give up as soon as it finds that
693 * there's no driver _already_ loaded.
694 */
695 if (is_c45 && c45_ids) {
696 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
697 int i;
698
699 for (i = 1; i < num_ids; i++) {
700 if (c45_ids->device_ids[i] == 0xffffffff)
701 continue;
702
703 ret = phy_request_driver_module(dev,
704 c45_ids->device_ids[i]);
705 if (ret)
706 break;
707 }
708 } else {
709 ret = phy_request_driver_module(dev, phy_id);
710 }
711
712 if (ret) {
713 put_device(&mdiodev->dev);
714 dev = ERR_PTR(ret);
715 }
716
717 return dev;
718}
719EXPORT_SYMBOL(phy_device_create);
720
721/* phy_c45_probe_present - checks to see if a MMD is present in the package
722 * @bus: the target MII bus
723 * @prtad: PHY package address on the MII bus
724 * @devad: PHY device (MMD) address
725 *
726 * Read the MDIO_STAT2 register, and check whether a device is responding
727 * at this address.
728 *
729 * Returns: negative error number on bus access error, zero if no device
730 * is responding, or positive if a device is present.
731 */
732static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad)
733{
734 int stat2;
735
736 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2);
737 if (stat2 < 0)
738 return stat2;
739
740 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL;
741}
742
743/* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
744 * @bus: the target MII bus
745 * @addr: PHY address on the MII bus
746 * @dev_addr: MMD address in the PHY.
747 * @devices_in_package: where to store the devices in package information.
748 *
749 * Description: reads devices in package registers of a MMD at @dev_addr
750 * from PHY at @addr on @bus.
751 *
752 * Returns: 0 on success, -EIO on failure.
753 */
754static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
755 u32 *devices_in_package)
756{
757 int phy_reg;
758
759 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2);
760 if (phy_reg < 0)
761 return -EIO;
762 *devices_in_package = phy_reg << 16;
763
764 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1);
765 if (phy_reg < 0)
766 return -EIO;
767 *devices_in_package |= phy_reg;
768
769 return 0;
770}
771
772/**
773 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
774 * @bus: the target MII bus
775 * @addr: PHY address on the MII bus
776 * @c45_ids: where to store the c45 ID information.
777 *
778 * Read the PHY "devices in package". If this appears to be valid, read
779 * the PHY identifiers for each device. Return the "devices in package"
780 * and identifiers in @c45_ids.
781 *
782 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
783 * the "devices in package" is invalid.
784 */
785static int get_phy_c45_ids(struct mii_bus *bus, int addr,
786 struct phy_c45_device_ids *c45_ids)
787{
788 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
789 u32 devs_in_pkg = 0;
790 int i, ret, phy_reg;
791
792 /* Find first non-zero Devices In package. Device zero is reserved
793 * for 802.3 c45 complied PHYs, so don't probe it at first.
794 */
795 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 ||
796 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) {
797 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
798 /* Check that there is a device present at this
799 * address before reading the devices-in-package
800 * register to avoid reading garbage from the PHY.
801 * Some PHYs (88x3310) vendor space is not IEEE802.3
802 * compliant.
803 */
804 ret = phy_c45_probe_present(bus, addr, i);
805 if (ret < 0)
806 return -EIO;
807
808 if (!ret)
809 continue;
810 }
811 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg);
812 if (phy_reg < 0)
813 return -EIO;
814 }
815
816 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) {
817 /* If mostly Fs, there is no device there, then let's probe
818 * MMD 0, as some 10G PHYs have zero Devices In package,
819 * e.g. Cortina CS4315/CS4340 PHY.
820 */
821 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg);
822 if (phy_reg < 0)
823 return -EIO;
824
825 /* no device there, let's get out of here */
826 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff)
827 return -ENODEV;
828 }
829
830 /* Now probe Device Identifiers for each device present. */
831 for (i = 1; i < num_ids; i++) {
832 if (!(devs_in_pkg & (1 << i)))
833 continue;
834
835 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
836 /* Probe the "Device Present" bits for the vendor MMDs
837 * to ignore these if they do not contain IEEE 802.3
838 * registers.
839 */
840 ret = phy_c45_probe_present(bus, addr, i);
841 if (ret < 0)
842 return ret;
843
844 if (!ret)
845 continue;
846 }
847
848 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1);
849 if (phy_reg < 0)
850 return -EIO;
851 c45_ids->device_ids[i] = phy_reg << 16;
852
853 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2);
854 if (phy_reg < 0)
855 return -EIO;
856 c45_ids->device_ids[i] |= phy_reg;
857 }
858
859 c45_ids->devices_in_package = devs_in_pkg;
860 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
861 c45_ids->mmds_present = devs_in_pkg & ~BIT(0);
862
863 return 0;
864}
865
866/**
867 * get_phy_c22_id - reads the specified addr for its clause 22 ID.
868 * @bus: the target MII bus
869 * @addr: PHY address on the MII bus
870 * @phy_id: where to store the ID retrieved.
871 *
872 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus,
873 * placing it in @phy_id. Return zero on successful read and the ID is
874 * valid, %-EIO on bus access error, or %-ENODEV if no device responds
875 * or invalid ID.
876 */
877static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
878{
879 int phy_reg;
880
881 /* Grab the bits from PHYIR1, and put them in the upper half */
882 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
883 if (phy_reg < 0) {
884 /* returning -ENODEV doesn't stop bus scanning */
885 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
886 }
887
888 *phy_id = phy_reg << 16;
889
890 /* Grab the bits from PHYIR2, and put them in the lower half */
891 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
892 if (phy_reg < 0) {
893 /* returning -ENODEV doesn't stop bus scanning */
894 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
895 }
896
897 *phy_id |= phy_reg;
898
899 /* If the phy_id is mostly Fs, there is no device there */
900 if ((*phy_id & 0x1fffffff) == 0x1fffffff)
901 return -ENODEV;
902
903 return 0;
904}
905
906/* Extract the phy ID from the compatible string of the form
907 * ethernet-phy-idAAAA.BBBB.
908 */
909int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
910{
911 unsigned int upper, lower;
912 const char *cp;
913 int ret;
914
915 ret = fwnode_property_read_string(fwnode, "compatible", &cp);
916 if (ret)
917 return ret;
918
919 if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
920 return -EINVAL;
921
922 *phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
923 return 0;
924}
925EXPORT_SYMBOL(fwnode_get_phy_id);
926
927/**
928 * get_phy_device - reads the specified PHY device and returns its @phy_device
929 * struct
930 * @bus: the target MII bus
931 * @addr: PHY address on the MII bus
932 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
933 *
934 * Probe for a PHY at @addr on @bus.
935 *
936 * When probing for a clause 22 PHY, then read the ID registers. If we find
937 * a valid ID, allocate and return a &struct phy_device.
938 *
939 * When probing for a clause 45 PHY, read the "devices in package" registers.
940 * If the "devices in package" appears valid, read the ID registers for each
941 * MMD, allocate and return a &struct phy_device.
942 *
943 * Returns an allocated &struct phy_device on success, %-ENODEV if there is
944 * no PHY present, or %-EIO on bus access error.
945 */
946struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
947{
948 struct phy_c45_device_ids c45_ids;
949 u32 phy_id = 0;
950 int r;
951
952 c45_ids.devices_in_package = 0;
953 c45_ids.mmds_present = 0;
954 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
955
956 if (is_c45)
957 r = get_phy_c45_ids(bus, addr, &c45_ids);
958 else
959 r = get_phy_c22_id(bus, addr, &phy_id);
960
961 if (r)
962 return ERR_PTR(r);
963
964 /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID
965 * of 0 when probed using get_phy_c22_id() with no error. Proceed to
966 * probe with C45 to see if we're able to get a valid PHY ID in the C45
967 * space, if successful, create the C45 PHY device.
968 */
969 if (!is_c45 && phy_id == 0 && bus->read_c45) {
970 r = get_phy_c45_ids(bus, addr, &c45_ids);
971 if (!r)
972 return phy_device_create(bus, addr, phy_id,
973 true, &c45_ids);
974 }
975
976 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
977}
978EXPORT_SYMBOL(get_phy_device);
979
980/**
981 * phy_device_register - Register the phy device on the MDIO bus
982 * @phydev: phy_device structure to be added to the MDIO bus
983 */
984int phy_device_register(struct phy_device *phydev)
985{
986 int err;
987
988 err = mdiobus_register_device(&phydev->mdio);
989 if (err)
990 return err;
991
992 /* Deassert the reset signal */
993 phy_device_reset(phydev, 0);
994
995 /* Run all of the fixups for this PHY */
996 err = phy_scan_fixups(phydev);
997 if (err) {
998 phydev_err(phydev, "failed to initialize\n");
999 goto out;
1000 }
1001
1002 err = device_add(&phydev->mdio.dev);
1003 if (err) {
1004 phydev_err(phydev, "failed to add\n");
1005 goto out;
1006 }
1007
1008 return 0;
1009
1010 out:
1011 /* Assert the reset signal */
1012 phy_device_reset(phydev, 1);
1013
1014 mdiobus_unregister_device(&phydev->mdio);
1015 return err;
1016}
1017EXPORT_SYMBOL(phy_device_register);
1018
1019/**
1020 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
1021 * @phydev: phy_device structure to remove
1022 *
1023 * This doesn't free the phy_device itself, it merely reverses the effects
1024 * of phy_device_register(). Use phy_device_free() to free the device
1025 * after calling this function.
1026 */
1027void phy_device_remove(struct phy_device *phydev)
1028{
1029 unregister_mii_timestamper(phydev->mii_ts);
1030 pse_control_put(phydev->psec);
1031
1032 device_del(&phydev->mdio.dev);
1033
1034 /* Assert the reset signal */
1035 phy_device_reset(phydev, 1);
1036
1037 mdiobus_unregister_device(&phydev->mdio);
1038}
1039EXPORT_SYMBOL(phy_device_remove);
1040
1041/**
1042 * phy_get_c45_ids - Read 802.3-c45 IDs for phy device.
1043 * @phydev: phy_device structure to read 802.3-c45 IDs
1044 *
1045 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
1046 * the "devices in package" is invalid.
1047 */
1048int phy_get_c45_ids(struct phy_device *phydev)
1049{
1050 return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
1051 &phydev->c45_ids);
1052}
1053EXPORT_SYMBOL(phy_get_c45_ids);
1054
1055/**
1056 * phy_find_first - finds the first PHY device on the bus
1057 * @bus: the target MII bus
1058 */
1059struct phy_device *phy_find_first(struct mii_bus *bus)
1060{
1061 struct phy_device *phydev;
1062 int addr;
1063
1064 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
1065 phydev = mdiobus_get_phy(bus, addr);
1066 if (phydev)
1067 return phydev;
1068 }
1069 return NULL;
1070}
1071EXPORT_SYMBOL(phy_find_first);
1072
1073static void phy_link_change(struct phy_device *phydev, bool up)
1074{
1075 struct net_device *netdev = phydev->attached_dev;
1076
1077 if (up)
1078 netif_carrier_on(netdev);
1079 else
1080 netif_carrier_off(netdev);
1081 phydev->adjust_link(netdev);
1082 if (phydev->mii_ts && phydev->mii_ts->link_state)
1083 phydev->mii_ts->link_state(phydev->mii_ts, phydev);
1084}
1085
1086/**
1087 * phy_prepare_link - prepares the PHY layer to monitor link status
1088 * @phydev: target phy_device struct
1089 * @handler: callback function for link status change notifications
1090 *
1091 * Description: Tells the PHY infrastructure to handle the
1092 * gory details on monitoring link status (whether through
1093 * polling or an interrupt), and to call back to the
1094 * connected device driver when the link status changes.
1095 * If you want to monitor your own link state, don't call
1096 * this function.
1097 */
1098static void phy_prepare_link(struct phy_device *phydev,
1099 void (*handler)(struct net_device *))
1100{
1101 phydev->adjust_link = handler;
1102}
1103
1104/**
1105 * phy_connect_direct - connect an ethernet device to a specific phy_device
1106 * @dev: the network device to connect
1107 * @phydev: the pointer to the phy device
1108 * @handler: callback function for state change notifications
1109 * @interface: PHY device's interface
1110 */
1111int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
1112 void (*handler)(struct net_device *),
1113 phy_interface_t interface)
1114{
1115 int rc;
1116
1117 if (!dev)
1118 return -EINVAL;
1119
1120 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1121 if (rc)
1122 return rc;
1123
1124 phy_prepare_link(phydev, handler);
1125 if (phy_interrupt_is_valid(phydev))
1126 phy_request_interrupt(phydev);
1127
1128 return 0;
1129}
1130EXPORT_SYMBOL(phy_connect_direct);
1131
1132/**
1133 * phy_connect - connect an ethernet device to a PHY device
1134 * @dev: the network device to connect
1135 * @bus_id: the id string of the PHY device to connect
1136 * @handler: callback function for state change notifications
1137 * @interface: PHY device's interface
1138 *
1139 * Description: Convenience function for connecting ethernet
1140 * devices to PHY devices. The default behavior is for
1141 * the PHY infrastructure to handle everything, and only notify
1142 * the connected driver when the link status changes. If you
1143 * don't want, or can't use the provided functionality, you may
1144 * choose to call only the subset of functions which provide
1145 * the desired functionality.
1146 */
1147struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
1148 void (*handler)(struct net_device *),
1149 phy_interface_t interface)
1150{
1151 struct phy_device *phydev;
1152 struct device *d;
1153 int rc;
1154
1155 /* Search the list of PHY devices on the mdio bus for the
1156 * PHY with the requested name
1157 */
1158 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1159 if (!d) {
1160 pr_err("PHY %s not found\n", bus_id);
1161 return ERR_PTR(-ENODEV);
1162 }
1163 phydev = to_phy_device(d);
1164
1165 rc = phy_connect_direct(dev, phydev, handler, interface);
1166 put_device(d);
1167 if (rc)
1168 return ERR_PTR(rc);
1169
1170 return phydev;
1171}
1172EXPORT_SYMBOL(phy_connect);
1173
1174/**
1175 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1176 * device
1177 * @phydev: target phy_device struct
1178 */
1179void phy_disconnect(struct phy_device *phydev)
1180{
1181 if (phy_is_started(phydev))
1182 phy_stop(phydev);
1183
1184 if (phy_interrupt_is_valid(phydev))
1185 phy_free_interrupt(phydev);
1186
1187 phydev->adjust_link = NULL;
1188
1189 phy_detach(phydev);
1190}
1191EXPORT_SYMBOL(phy_disconnect);
1192
1193/**
1194 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1195 * @phydev: The PHY device to poll
1196 *
1197 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1198 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1199 * register must be polled until the BMCR_RESET bit clears.
1200 *
1201 * Furthermore, any attempts to write to PHY registers may have no effect
1202 * or even generate MDIO bus errors until this is complete.
1203 *
1204 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1205 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1206 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1207 * effort to support such broken PHYs, this function is separate from the
1208 * standard phy_init_hw() which will zero all the other bits in the BMCR
1209 * and reapply all driver-specific and board-specific fixups.
1210 */
1211static int phy_poll_reset(struct phy_device *phydev)
1212{
1213 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1214 int ret, val;
1215
1216 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
1217 50000, 600000, true);
1218 if (ret)
1219 return ret;
1220 /* Some chips (smsc911x) may still need up to another 1ms after the
1221 * BMCR_RESET bit is cleared before they are usable.
1222 */
1223 msleep(1);
1224 return 0;
1225}
1226
1227int phy_init_hw(struct phy_device *phydev)
1228{
1229 int ret = 0;
1230
1231 /* Deassert the reset signal */
1232 phy_device_reset(phydev, 0);
1233
1234 if (!phydev->drv)
1235 return 0;
1236
1237 if (phydev->drv->soft_reset) {
1238 ret = phydev->drv->soft_reset(phydev);
1239 if (ret < 0)
1240 return ret;
1241
1242 /* see comment in genphy_soft_reset for an explanation */
1243 phydev->suspended = 0;
1244 }
1245
1246 ret = phy_scan_fixups(phydev);
1247 if (ret < 0)
1248 return ret;
1249
1250 phy_interface_zero(phydev->possible_interfaces);
1251
1252 if (phydev->drv->config_init) {
1253 ret = phydev->drv->config_init(phydev);
1254 if (ret < 0)
1255 return ret;
1256 }
1257
1258 if (phydev->drv->config_intr) {
1259 ret = phydev->drv->config_intr(phydev);
1260 if (ret < 0)
1261 return ret;
1262 }
1263
1264 return 0;
1265}
1266EXPORT_SYMBOL(phy_init_hw);
1267
1268void phy_attached_info(struct phy_device *phydev)
1269{
1270 phy_attached_print(phydev, NULL);
1271}
1272EXPORT_SYMBOL(phy_attached_info);
1273
1274#define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)"
1275char *phy_attached_info_irq(struct phy_device *phydev)
1276{
1277 char *irq_str;
1278 char irq_num[8];
1279
1280 switch(phydev->irq) {
1281 case PHY_POLL:
1282 irq_str = "POLL";
1283 break;
1284 case PHY_MAC_INTERRUPT:
1285 irq_str = "MAC";
1286 break;
1287 default:
1288 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1289 irq_str = irq_num;
1290 break;
1291 }
1292
1293 return kasprintf(GFP_KERNEL, "%s", irq_str);
1294}
1295EXPORT_SYMBOL(phy_attached_info_irq);
1296
1297void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1298{
1299 const char *unbound = phydev->drv ? "" : "[unbound] ";
1300 char *irq_str = phy_attached_info_irq(phydev);
1301
1302 if (!fmt) {
1303 phydev_info(phydev, ATTACHED_FMT "\n", unbound,
1304 phydev_name(phydev), irq_str);
1305 } else {
1306 va_list ap;
1307
1308 phydev_info(phydev, ATTACHED_FMT, unbound,
1309 phydev_name(phydev), irq_str);
1310
1311 va_start(ap, fmt);
1312 vprintk(fmt, ap);
1313 va_end(ap);
1314 }
1315 kfree(irq_str);
1316}
1317EXPORT_SYMBOL(phy_attached_print);
1318
1319static void phy_sysfs_create_links(struct phy_device *phydev)
1320{
1321 struct net_device *dev = phydev->attached_dev;
1322 int err;
1323
1324 if (!dev)
1325 return;
1326
1327 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1328 "attached_dev");
1329 if (err)
1330 return;
1331
1332 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1333 &phydev->mdio.dev.kobj,
1334 "phydev");
1335 if (err) {
1336 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1337 kobject_name(&phydev->mdio.dev.kobj),
1338 err);
1339 /* non-fatal - some net drivers can use one netdevice
1340 * with more then one phy
1341 */
1342 }
1343
1344 phydev->sysfs_links = true;
1345}
1346
1347static ssize_t
1348phy_standalone_show(struct device *dev, struct device_attribute *attr,
1349 char *buf)
1350{
1351 struct phy_device *phydev = to_phy_device(dev);
1352
1353 return sysfs_emit(buf, "%d\n", !phydev->attached_dev);
1354}
1355static DEVICE_ATTR_RO(phy_standalone);
1356
1357/**
1358 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1359 * @upstream: pointer to the phy device
1360 * @bus: sfp bus representing cage being attached
1361 *
1362 * This is used to fill in the sfp_upstream_ops .attach member.
1363 */
1364void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1365{
1366 struct phy_device *phydev = upstream;
1367
1368 if (phydev->attached_dev)
1369 phydev->attached_dev->sfp_bus = bus;
1370 phydev->sfp_bus_attached = true;
1371}
1372EXPORT_SYMBOL(phy_sfp_attach);
1373
1374/**
1375 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1376 * @upstream: pointer to the phy device
1377 * @bus: sfp bus representing cage being attached
1378 *
1379 * This is used to fill in the sfp_upstream_ops .detach member.
1380 */
1381void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1382{
1383 struct phy_device *phydev = upstream;
1384
1385 if (phydev->attached_dev)
1386 phydev->attached_dev->sfp_bus = NULL;
1387 phydev->sfp_bus_attached = false;
1388}
1389EXPORT_SYMBOL(phy_sfp_detach);
1390
1391/**
1392 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1393 * @phydev: Pointer to phy_device
1394 * @ops: SFP's upstream operations
1395 */
1396int phy_sfp_probe(struct phy_device *phydev,
1397 const struct sfp_upstream_ops *ops)
1398{
1399 struct sfp_bus *bus;
1400 int ret = 0;
1401
1402 if (phydev->mdio.dev.fwnode) {
1403 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1404 if (IS_ERR(bus))
1405 return PTR_ERR(bus);
1406
1407 phydev->sfp_bus = bus;
1408
1409 ret = sfp_bus_add_upstream(bus, phydev, ops);
1410 sfp_bus_put(bus);
1411 }
1412 return ret;
1413}
1414EXPORT_SYMBOL(phy_sfp_probe);
1415
1416/**
1417 * phy_attach_direct - attach a network device to a given PHY device pointer
1418 * @dev: network device to attach
1419 * @phydev: Pointer to phy_device to attach
1420 * @flags: PHY device's dev_flags
1421 * @interface: PHY device's interface
1422 *
1423 * Description: Called by drivers to attach to a particular PHY
1424 * device. The phy_device is found, and properly hooked up
1425 * to the phy_driver. If no driver is attached, then a
1426 * generic driver is used. The phy_device is given a ptr to
1427 * the attaching device, and given a callback for link status
1428 * change. The phy_device is returned to the attaching driver.
1429 * This function takes a reference on the phy device.
1430 */
1431int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1432 u32 flags, phy_interface_t interface)
1433{
1434 struct mii_bus *bus = phydev->mdio.bus;
1435 struct device *d = &phydev->mdio.dev;
1436 struct module *ndev_owner = NULL;
1437 bool using_genphy = false;
1438 int err;
1439
1440 /* For Ethernet device drivers that register their own MDIO bus, we
1441 * will have bus->owner match ndev_mod, so we do not want to increment
1442 * our own module->refcnt here, otherwise we would not be able to
1443 * unload later on.
1444 */
1445 if (dev)
1446 ndev_owner = dev->dev.parent->driver->owner;
1447 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1448 phydev_err(phydev, "failed to get the bus module\n");
1449 return -EIO;
1450 }
1451
1452 get_device(d);
1453
1454 /* Assume that if there is no driver, that it doesn't
1455 * exist, and we should use the genphy driver.
1456 */
1457 if (!d->driver) {
1458 if (phydev->is_c45)
1459 d->driver = &genphy_c45_driver.mdiodrv.driver;
1460 else
1461 d->driver = &genphy_driver.mdiodrv.driver;
1462
1463 using_genphy = true;
1464 }
1465
1466 if (!try_module_get(d->driver->owner)) {
1467 phydev_err(phydev, "failed to get the device driver module\n");
1468 err = -EIO;
1469 goto error_put_device;
1470 }
1471
1472 if (using_genphy) {
1473 err = d->driver->probe(d);
1474 if (err >= 0)
1475 err = device_bind_driver(d);
1476
1477 if (err)
1478 goto error_module_put;
1479 }
1480
1481 if (phydev->attached_dev) {
1482 dev_err(&dev->dev, "PHY already attached\n");
1483 err = -EBUSY;
1484 goto error;
1485 }
1486
1487 phydev->phy_link_change = phy_link_change;
1488 if (dev) {
1489 phydev->attached_dev = dev;
1490 dev->phydev = phydev;
1491
1492 if (phydev->sfp_bus_attached)
1493 dev->sfp_bus = phydev->sfp_bus;
1494 }
1495
1496 /* Some Ethernet drivers try to connect to a PHY device before
1497 * calling register_netdevice() -> netdev_register_kobject() and
1498 * does the dev->dev.kobj initialization. Here we only check for
1499 * success which indicates that the network device kobject is
1500 * ready. Once we do that we still need to keep track of whether
1501 * links were successfully set up or not for phy_detach() to
1502 * remove them accordingly.
1503 */
1504 phydev->sysfs_links = false;
1505
1506 phy_sysfs_create_links(phydev);
1507
1508 if (!phydev->attached_dev) {
1509 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1510 &dev_attr_phy_standalone.attr);
1511 if (err)
1512 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1513 }
1514
1515 phydev->dev_flags |= flags;
1516
1517 phydev->interface = interface;
1518
1519 phydev->state = PHY_READY;
1520
1521 phydev->interrupts = PHY_INTERRUPT_DISABLED;
1522
1523 /* PHYs can request to use poll mode even though they have an
1524 * associated interrupt line. This could be the case if they
1525 * detect a broken interrupt handling.
1526 */
1527 if (phydev->dev_flags & PHY_F_NO_IRQ)
1528 phydev->irq = PHY_POLL;
1529
1530 /* Port is set to PORT_TP by default and the actual PHY driver will set
1531 * it to different value depending on the PHY configuration. If we have
1532 * the generic PHY driver we can't figure it out, thus set the old
1533 * legacy PORT_MII value.
1534 */
1535 if (using_genphy)
1536 phydev->port = PORT_MII;
1537
1538 /* Initial carrier state is off as the phy is about to be
1539 * (re)initialized.
1540 */
1541 if (dev)
1542 netif_carrier_off(phydev->attached_dev);
1543
1544 /* Do initial configuration here, now that
1545 * we have certain key parameters
1546 * (dev_flags and interface)
1547 */
1548 err = phy_init_hw(phydev);
1549 if (err)
1550 goto error;
1551
1552 phy_resume(phydev);
1553 if (!phydev->is_on_sfp_module)
1554 phy_led_triggers_register(phydev);
1555
1556 /**
1557 * If the external phy used by current mac interface is managed by
1558 * another mac interface, so we should create a device link between
1559 * phy dev and mac dev.
1560 */
1561 if (dev && phydev->mdio.bus->parent && dev->dev.parent != phydev->mdio.bus->parent)
1562 phydev->devlink = device_link_add(dev->dev.parent, &phydev->mdio.dev,
1563 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
1564
1565 return err;
1566
1567error:
1568 /* phy_detach() does all of the cleanup below */
1569 phy_detach(phydev);
1570 return err;
1571
1572error_module_put:
1573 module_put(d->driver->owner);
1574 d->driver = NULL;
1575error_put_device:
1576 put_device(d);
1577 if (ndev_owner != bus->owner)
1578 module_put(bus->owner);
1579 return err;
1580}
1581EXPORT_SYMBOL(phy_attach_direct);
1582
1583/**
1584 * phy_attach - attach a network device to a particular PHY device
1585 * @dev: network device to attach
1586 * @bus_id: Bus ID of PHY device to attach
1587 * @interface: PHY device's interface
1588 *
1589 * Description: Same as phy_attach_direct() except that a PHY bus_id
1590 * string is passed instead of a pointer to a struct phy_device.
1591 */
1592struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1593 phy_interface_t interface)
1594{
1595 struct bus_type *bus = &mdio_bus_type;
1596 struct phy_device *phydev;
1597 struct device *d;
1598 int rc;
1599
1600 if (!dev)
1601 return ERR_PTR(-EINVAL);
1602
1603 /* Search the list of PHY devices on the mdio bus for the
1604 * PHY with the requested name
1605 */
1606 d = bus_find_device_by_name(bus, NULL, bus_id);
1607 if (!d) {
1608 pr_err("PHY %s not found\n", bus_id);
1609 return ERR_PTR(-ENODEV);
1610 }
1611 phydev = to_phy_device(d);
1612
1613 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1614 put_device(d);
1615 if (rc)
1616 return ERR_PTR(rc);
1617
1618 return phydev;
1619}
1620EXPORT_SYMBOL(phy_attach);
1621
1622static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1623 struct device_driver *driver)
1624{
1625 struct device *d = &phydev->mdio.dev;
1626 bool ret = false;
1627
1628 if (!phydev->drv)
1629 return ret;
1630
1631 get_device(d);
1632 ret = d->driver == driver;
1633 put_device(d);
1634
1635 return ret;
1636}
1637
1638bool phy_driver_is_genphy(struct phy_device *phydev)
1639{
1640 return phy_driver_is_genphy_kind(phydev,
1641 &genphy_driver.mdiodrv.driver);
1642}
1643EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1644
1645bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1646{
1647 return phy_driver_is_genphy_kind(phydev,
1648 &genphy_c45_driver.mdiodrv.driver);
1649}
1650EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1651
1652/**
1653 * phy_package_join - join a common PHY group
1654 * @phydev: target phy_device struct
1655 * @base_addr: cookie and base PHY address of PHY package for offset
1656 * calculation of global register access
1657 * @priv_size: if non-zero allocate this amount of bytes for private data
1658 *
1659 * This joins a PHY group and provides a shared storage for all phydevs in
1660 * this group. This is intended to be used for packages which contain
1661 * more than one PHY, for example a quad PHY transceiver.
1662 *
1663 * The base_addr parameter serves as cookie which has to have the same values
1664 * for all members of one group and as the base PHY address of the PHY package
1665 * for offset calculation to access generic registers of a PHY package.
1666 * Usually, one of the PHY addresses of the different PHYs in the package
1667 * provides access to these global registers.
1668 * The address which is given here, will be used in the phy_package_read()
1669 * and phy_package_write() convenience functions as base and added to the
1670 * passed offset in those functions.
1671 *
1672 * This will set the shared pointer of the phydev to the shared storage.
1673 * If this is the first call for a this cookie the shared storage will be
1674 * allocated. If priv_size is non-zero, the given amount of bytes are
1675 * allocated for the priv member.
1676 *
1677 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join()
1678 * with the same cookie but a different priv_size is an error.
1679 */
1680int phy_package_join(struct phy_device *phydev, int base_addr, size_t priv_size)
1681{
1682 struct mii_bus *bus = phydev->mdio.bus;
1683 struct phy_package_shared *shared;
1684 int ret;
1685
1686 if (base_addr < 0 || base_addr >= PHY_MAX_ADDR)
1687 return -EINVAL;
1688
1689 mutex_lock(&bus->shared_lock);
1690 shared = bus->shared[base_addr];
1691 if (!shared) {
1692 ret = -ENOMEM;
1693 shared = kzalloc(sizeof(*shared), GFP_KERNEL);
1694 if (!shared)
1695 goto err_unlock;
1696 if (priv_size) {
1697 shared->priv = kzalloc(priv_size, GFP_KERNEL);
1698 if (!shared->priv)
1699 goto err_free;
1700 shared->priv_size = priv_size;
1701 }
1702 shared->base_addr = base_addr;
1703 refcount_set(&shared->refcnt, 1);
1704 bus->shared[base_addr] = shared;
1705 } else {
1706 ret = -EINVAL;
1707 if (priv_size && priv_size != shared->priv_size)
1708 goto err_unlock;
1709 refcount_inc(&shared->refcnt);
1710 }
1711 mutex_unlock(&bus->shared_lock);
1712
1713 phydev->shared = shared;
1714
1715 return 0;
1716
1717err_free:
1718 kfree(shared);
1719err_unlock:
1720 mutex_unlock(&bus->shared_lock);
1721 return ret;
1722}
1723EXPORT_SYMBOL_GPL(phy_package_join);
1724
1725/**
1726 * phy_package_leave - leave a common PHY group
1727 * @phydev: target phy_device struct
1728 *
1729 * This leaves a PHY group created by phy_package_join(). If this phydev
1730 * was the last user of the shared data between the group, this data is
1731 * freed. Resets the phydev->shared pointer to NULL.
1732 */
1733void phy_package_leave(struct phy_device *phydev)
1734{
1735 struct phy_package_shared *shared = phydev->shared;
1736 struct mii_bus *bus = phydev->mdio.bus;
1737
1738 if (!shared)
1739 return;
1740
1741 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) {
1742 bus->shared[shared->base_addr] = NULL;
1743 mutex_unlock(&bus->shared_lock);
1744 kfree(shared->priv);
1745 kfree(shared);
1746 }
1747
1748 phydev->shared = NULL;
1749}
1750EXPORT_SYMBOL_GPL(phy_package_leave);
1751
1752static void devm_phy_package_leave(struct device *dev, void *res)
1753{
1754 phy_package_leave(*(struct phy_device **)res);
1755}
1756
1757/**
1758 * devm_phy_package_join - resource managed phy_package_join()
1759 * @dev: device that is registering this PHY package
1760 * @phydev: target phy_device struct
1761 * @base_addr: cookie and base PHY address of PHY package for offset
1762 * calculation of global register access
1763 * @priv_size: if non-zero allocate this amount of bytes for private data
1764 *
1765 * Managed phy_package_join(). Shared storage fetched by this function,
1766 * phy_package_leave() is automatically called on driver detach. See
1767 * phy_package_join() for more information.
1768 */
1769int devm_phy_package_join(struct device *dev, struct phy_device *phydev,
1770 int base_addr, size_t priv_size)
1771{
1772 struct phy_device **ptr;
1773 int ret;
1774
1775 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
1776 GFP_KERNEL);
1777 if (!ptr)
1778 return -ENOMEM;
1779
1780 ret = phy_package_join(phydev, base_addr, priv_size);
1781
1782 if (!ret) {
1783 *ptr = phydev;
1784 devres_add(dev, ptr);
1785 } else {
1786 devres_free(ptr);
1787 }
1788
1789 return ret;
1790}
1791EXPORT_SYMBOL_GPL(devm_phy_package_join);
1792
1793/**
1794 * phy_detach - detach a PHY device from its network device
1795 * @phydev: target phy_device struct
1796 *
1797 * This detaches the phy device from its network device and the phy
1798 * driver, and drops the reference count taken in phy_attach_direct().
1799 */
1800void phy_detach(struct phy_device *phydev)
1801{
1802 struct net_device *dev = phydev->attached_dev;
1803 struct module *ndev_owner = NULL;
1804 struct mii_bus *bus;
1805
1806 if (phydev->devlink)
1807 device_link_del(phydev->devlink);
1808
1809 if (phydev->sysfs_links) {
1810 if (dev)
1811 sysfs_remove_link(&dev->dev.kobj, "phydev");
1812 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1813 }
1814
1815 if (!phydev->attached_dev)
1816 sysfs_remove_file(&phydev->mdio.dev.kobj,
1817 &dev_attr_phy_standalone.attr);
1818
1819 phy_suspend(phydev);
1820 if (dev) {
1821 phydev->attached_dev->phydev = NULL;
1822 phydev->attached_dev = NULL;
1823 }
1824 phydev->phylink = NULL;
1825
1826 if (!phydev->is_on_sfp_module)
1827 phy_led_triggers_unregister(phydev);
1828
1829 if (phydev->mdio.dev.driver)
1830 module_put(phydev->mdio.dev.driver->owner);
1831
1832 /* If the device had no specific driver before (i.e. - it
1833 * was using the generic driver), we unbind the device
1834 * from the generic driver so that there's a chance a
1835 * real driver could be loaded
1836 */
1837 if (phy_driver_is_genphy(phydev) ||
1838 phy_driver_is_genphy_10g(phydev))
1839 device_release_driver(&phydev->mdio.dev);
1840
1841 /* Assert the reset signal */
1842 phy_device_reset(phydev, 1);
1843
1844 /*
1845 * The phydev might go away on the put_device() below, so avoid
1846 * a use-after-free bug by reading the underlying bus first.
1847 */
1848 bus = phydev->mdio.bus;
1849
1850 put_device(&phydev->mdio.dev);
1851 if (dev)
1852 ndev_owner = dev->dev.parent->driver->owner;
1853 if (ndev_owner != bus->owner)
1854 module_put(bus->owner);
1855}
1856EXPORT_SYMBOL(phy_detach);
1857
1858int phy_suspend(struct phy_device *phydev)
1859{
1860 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1861 struct net_device *netdev = phydev->attached_dev;
1862 struct phy_driver *phydrv = phydev->drv;
1863 int ret;
1864
1865 if (phydev->suspended)
1866 return 0;
1867
1868 phy_ethtool_get_wol(phydev, &wol);
1869 phydev->wol_enabled = wol.wolopts || (netdev && netdev->wol_enabled);
1870 /* If the device has WOL enabled, we cannot suspend the PHY */
1871 if (phydev->wol_enabled && !(phydrv->flags & PHY_ALWAYS_CALL_SUSPEND))
1872 return -EBUSY;
1873
1874 if (!phydrv || !phydrv->suspend)
1875 return 0;
1876
1877 ret = phydrv->suspend(phydev);
1878 if (!ret)
1879 phydev->suspended = true;
1880
1881 return ret;
1882}
1883EXPORT_SYMBOL(phy_suspend);
1884
1885int __phy_resume(struct phy_device *phydev)
1886{
1887 struct phy_driver *phydrv = phydev->drv;
1888 int ret;
1889
1890 lockdep_assert_held(&phydev->lock);
1891
1892 if (!phydrv || !phydrv->resume)
1893 return 0;
1894
1895 ret = phydrv->resume(phydev);
1896 if (!ret)
1897 phydev->suspended = false;
1898
1899 return ret;
1900}
1901EXPORT_SYMBOL(__phy_resume);
1902
1903int phy_resume(struct phy_device *phydev)
1904{
1905 int ret;
1906
1907 mutex_lock(&phydev->lock);
1908 ret = __phy_resume(phydev);
1909 mutex_unlock(&phydev->lock);
1910
1911 return ret;
1912}
1913EXPORT_SYMBOL(phy_resume);
1914
1915int phy_loopback(struct phy_device *phydev, bool enable)
1916{
1917 int ret = 0;
1918
1919 if (!phydev->drv)
1920 return -EIO;
1921
1922 mutex_lock(&phydev->lock);
1923
1924 if (enable && phydev->loopback_enabled) {
1925 ret = -EBUSY;
1926 goto out;
1927 }
1928
1929 if (!enable && !phydev->loopback_enabled) {
1930 ret = -EINVAL;
1931 goto out;
1932 }
1933
1934 if (phydev->drv->set_loopback)
1935 ret = phydev->drv->set_loopback(phydev, enable);
1936 else
1937 ret = genphy_loopback(phydev, enable);
1938
1939 if (ret)
1940 goto out;
1941
1942 phydev->loopback_enabled = enable;
1943
1944out:
1945 mutex_unlock(&phydev->lock);
1946 return ret;
1947}
1948EXPORT_SYMBOL(phy_loopback);
1949
1950/**
1951 * phy_reset_after_clk_enable - perform a PHY reset if needed
1952 * @phydev: target phy_device struct
1953 *
1954 * Description: Some PHYs are known to need a reset after their refclk was
1955 * enabled. This function evaluates the flags and perform the reset if it's
1956 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1957 * was reset.
1958 */
1959int phy_reset_after_clk_enable(struct phy_device *phydev)
1960{
1961 if (!phydev || !phydev->drv)
1962 return -ENODEV;
1963
1964 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1965 phy_device_reset(phydev, 1);
1966 phy_device_reset(phydev, 0);
1967 return 1;
1968 }
1969
1970 return 0;
1971}
1972EXPORT_SYMBOL(phy_reset_after_clk_enable);
1973
1974/* Generic PHY support and helper functions */
1975
1976/**
1977 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1978 * @phydev: target phy_device struct
1979 *
1980 * Description: Writes MII_ADVERTISE with the appropriate values,
1981 * after sanitizing the values to make sure we only advertise
1982 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1983 * hasn't changed, and > 0 if it has changed.
1984 */
1985static int genphy_config_advert(struct phy_device *phydev)
1986{
1987 int err, bmsr, changed = 0;
1988 u32 adv;
1989
1990 /* Only allow advertising what this PHY supports */
1991 linkmode_and(phydev->advertising, phydev->advertising,
1992 phydev->supported);
1993
1994 adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
1995
1996 /* Setup standard advertisement */
1997 err = phy_modify_changed(phydev, MII_ADVERTISE,
1998 ADVERTISE_ALL | ADVERTISE_100BASE4 |
1999 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
2000 adv);
2001 if (err < 0)
2002 return err;
2003 if (err > 0)
2004 changed = 1;
2005
2006 bmsr = phy_read(phydev, MII_BMSR);
2007 if (bmsr < 0)
2008 return bmsr;
2009
2010 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
2011 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
2012 * logical 1.
2013 */
2014 if (!(bmsr & BMSR_ESTATEN))
2015 return changed;
2016
2017 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
2018
2019 err = phy_modify_changed(phydev, MII_CTRL1000,
2020 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
2021 adv);
2022 if (err < 0)
2023 return err;
2024 if (err > 0)
2025 changed = 1;
2026
2027 return changed;
2028}
2029
2030/**
2031 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
2032 * @phydev: target phy_device struct
2033 *
2034 * Description: Writes MII_ADVERTISE with the appropriate values,
2035 * after sanitizing the values to make sure we only advertise
2036 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
2037 * hasn't changed, and > 0 if it has changed. This function is intended
2038 * for Clause 37 1000Base-X mode.
2039 */
2040static int genphy_c37_config_advert(struct phy_device *phydev)
2041{
2042 u16 adv = 0;
2043
2044 /* Only allow advertising what this PHY supports */
2045 linkmode_and(phydev->advertising, phydev->advertising,
2046 phydev->supported);
2047
2048 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2049 phydev->advertising))
2050 adv |= ADVERTISE_1000XFULL;
2051 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2052 phydev->advertising))
2053 adv |= ADVERTISE_1000XPAUSE;
2054 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2055 phydev->advertising))
2056 adv |= ADVERTISE_1000XPSE_ASYM;
2057
2058 return phy_modify_changed(phydev, MII_ADVERTISE,
2059 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
2060 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
2061 adv);
2062}
2063
2064/**
2065 * genphy_config_eee_advert - disable unwanted eee mode advertisement
2066 * @phydev: target phy_device struct
2067 *
2068 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
2069 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
2070 * changed, and 1 if it has changed.
2071 */
2072int genphy_config_eee_advert(struct phy_device *phydev)
2073{
2074 int err;
2075
2076 /* Nothing to disable */
2077 if (!phydev->eee_broken_modes)
2078 return 0;
2079
2080 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
2081 phydev->eee_broken_modes, 0);
2082 /* If the call failed, we assume that EEE is not supported */
2083 return err < 0 ? 0 : err;
2084}
2085EXPORT_SYMBOL(genphy_config_eee_advert);
2086
2087/**
2088 * genphy_setup_forced - configures/forces speed/duplex from @phydev
2089 * @phydev: target phy_device struct
2090 *
2091 * Description: Configures MII_BMCR to force speed/duplex
2092 * to the values in phydev. Assumes that the values are valid.
2093 * Please see phy_sanitize_settings().
2094 */
2095int genphy_setup_forced(struct phy_device *phydev)
2096{
2097 u16 ctl;
2098
2099 phydev->pause = 0;
2100 phydev->asym_pause = 0;
2101
2102 ctl = mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2103
2104 return phy_modify(phydev, MII_BMCR,
2105 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
2106}
2107EXPORT_SYMBOL(genphy_setup_forced);
2108
2109static int genphy_setup_master_slave(struct phy_device *phydev)
2110{
2111 u16 ctl = 0;
2112
2113 if (!phydev->is_gigabit_capable)
2114 return 0;
2115
2116 switch (phydev->master_slave_set) {
2117 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
2118 ctl |= CTL1000_PREFER_MASTER;
2119 break;
2120 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
2121 break;
2122 case MASTER_SLAVE_CFG_MASTER_FORCE:
2123 ctl |= CTL1000_AS_MASTER;
2124 fallthrough;
2125 case MASTER_SLAVE_CFG_SLAVE_FORCE:
2126 ctl |= CTL1000_ENABLE_MASTER;
2127 break;
2128 case MASTER_SLAVE_CFG_UNKNOWN:
2129 case MASTER_SLAVE_CFG_UNSUPPORTED:
2130 return 0;
2131 default:
2132 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
2133 return -EOPNOTSUPP;
2134 }
2135
2136 return phy_modify_changed(phydev, MII_CTRL1000,
2137 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER |
2138 CTL1000_PREFER_MASTER), ctl);
2139}
2140
2141int genphy_read_master_slave(struct phy_device *phydev)
2142{
2143 int cfg, state;
2144 int val;
2145
2146 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
2147 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
2148
2149 val = phy_read(phydev, MII_CTRL1000);
2150 if (val < 0)
2151 return val;
2152
2153 if (val & CTL1000_ENABLE_MASTER) {
2154 if (val & CTL1000_AS_MASTER)
2155 cfg = MASTER_SLAVE_CFG_MASTER_FORCE;
2156 else
2157 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE;
2158 } else {
2159 if (val & CTL1000_PREFER_MASTER)
2160 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED;
2161 else
2162 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
2163 }
2164
2165 val = phy_read(phydev, MII_STAT1000);
2166 if (val < 0)
2167 return val;
2168
2169 if (val & LPA_1000MSFAIL) {
2170 state = MASTER_SLAVE_STATE_ERR;
2171 } else if (phydev->link) {
2172 /* this bits are valid only for active link */
2173 if (val & LPA_1000MSRES)
2174 state = MASTER_SLAVE_STATE_MASTER;
2175 else
2176 state = MASTER_SLAVE_STATE_SLAVE;
2177 } else {
2178 state = MASTER_SLAVE_STATE_UNKNOWN;
2179 }
2180
2181 phydev->master_slave_get = cfg;
2182 phydev->master_slave_state = state;
2183
2184 return 0;
2185}
2186EXPORT_SYMBOL(genphy_read_master_slave);
2187
2188/**
2189 * genphy_restart_aneg - Enable and Restart Autonegotiation
2190 * @phydev: target phy_device struct
2191 */
2192int genphy_restart_aneg(struct phy_device *phydev)
2193{
2194 /* Don't isolate the PHY if we're negotiating */
2195 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
2196 BMCR_ANENABLE | BMCR_ANRESTART);
2197}
2198EXPORT_SYMBOL(genphy_restart_aneg);
2199
2200/**
2201 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
2202 * @phydev: target phy_device struct
2203 * @restart: whether aneg restart is requested
2204 *
2205 * Check, and restart auto-negotiation if needed.
2206 */
2207int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
2208{
2209 int ret;
2210
2211 if (!restart) {
2212 /* Advertisement hasn't changed, but maybe aneg was never on to
2213 * begin with? Or maybe phy was isolated?
2214 */
2215 ret = phy_read(phydev, MII_BMCR);
2216 if (ret < 0)
2217 return ret;
2218
2219 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
2220 restart = true;
2221 }
2222
2223 if (restart)
2224 return genphy_restart_aneg(phydev);
2225
2226 return 0;
2227}
2228EXPORT_SYMBOL(genphy_check_and_restart_aneg);
2229
2230/**
2231 * __genphy_config_aneg - restart auto-negotiation or write BMCR
2232 * @phydev: target phy_device struct
2233 * @changed: whether autoneg is requested
2234 *
2235 * Description: If auto-negotiation is enabled, we configure the
2236 * advertising, and then restart auto-negotiation. If it is not
2237 * enabled, then we write the BMCR.
2238 */
2239int __genphy_config_aneg(struct phy_device *phydev, bool changed)
2240{
2241 int err;
2242
2243 err = genphy_c45_an_config_eee_aneg(phydev);
2244 if (err < 0)
2245 return err;
2246 else if (err)
2247 changed = true;
2248
2249 err = genphy_setup_master_slave(phydev);
2250 if (err < 0)
2251 return err;
2252 else if (err)
2253 changed = true;
2254
2255 if (AUTONEG_ENABLE != phydev->autoneg)
2256 return genphy_setup_forced(phydev);
2257
2258 err = genphy_config_advert(phydev);
2259 if (err < 0) /* error */
2260 return err;
2261 else if (err)
2262 changed = true;
2263
2264 return genphy_check_and_restart_aneg(phydev, changed);
2265}
2266EXPORT_SYMBOL(__genphy_config_aneg);
2267
2268/**
2269 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
2270 * @phydev: target phy_device struct
2271 *
2272 * Description: If auto-negotiation is enabled, we configure the
2273 * advertising, and then restart auto-negotiation. If it is not
2274 * enabled, then we write the BMCR. This function is intended
2275 * for use with Clause 37 1000Base-X mode.
2276 */
2277int genphy_c37_config_aneg(struct phy_device *phydev)
2278{
2279 int err, changed;
2280
2281 if (phydev->autoneg != AUTONEG_ENABLE)
2282 return genphy_setup_forced(phydev);
2283
2284 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
2285 BMCR_SPEED1000);
2286 if (err)
2287 return err;
2288
2289 changed = genphy_c37_config_advert(phydev);
2290 if (changed < 0) /* error */
2291 return changed;
2292
2293 if (!changed) {
2294 /* Advertisement hasn't changed, but maybe aneg was never on to
2295 * begin with? Or maybe phy was isolated?
2296 */
2297 int ctl = phy_read(phydev, MII_BMCR);
2298
2299 if (ctl < 0)
2300 return ctl;
2301
2302 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
2303 changed = 1; /* do restart aneg */
2304 }
2305
2306 /* Only restart aneg if we are advertising something different
2307 * than we were before.
2308 */
2309 if (changed > 0)
2310 return genphy_restart_aneg(phydev);
2311
2312 return 0;
2313}
2314EXPORT_SYMBOL(genphy_c37_config_aneg);
2315
2316/**
2317 * genphy_aneg_done - return auto-negotiation status
2318 * @phydev: target phy_device struct
2319 *
2320 * Description: Reads the status register and returns 0 either if
2321 * auto-negotiation is incomplete, or if there was an error.
2322 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
2323 */
2324int genphy_aneg_done(struct phy_device *phydev)
2325{
2326 int retval = phy_read(phydev, MII_BMSR);
2327
2328 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
2329}
2330EXPORT_SYMBOL(genphy_aneg_done);
2331
2332/**
2333 * genphy_update_link - update link status in @phydev
2334 * @phydev: target phy_device struct
2335 *
2336 * Description: Update the value in phydev->link to reflect the
2337 * current link value. In order to do this, we need to read
2338 * the status register twice, keeping the second value.
2339 */
2340int genphy_update_link(struct phy_device *phydev)
2341{
2342 int status = 0, bmcr;
2343
2344 bmcr = phy_read(phydev, MII_BMCR);
2345 if (bmcr < 0)
2346 return bmcr;
2347
2348 /* Autoneg is being started, therefore disregard BMSR value and
2349 * report link as down.
2350 */
2351 if (bmcr & BMCR_ANRESTART)
2352 goto done;
2353
2354 /* The link state is latched low so that momentary link
2355 * drops can be detected. Do not double-read the status
2356 * in polling mode to detect such short link drops except
2357 * the link was already down.
2358 */
2359 if (!phy_polling_mode(phydev) || !phydev->link) {
2360 status = phy_read(phydev, MII_BMSR);
2361 if (status < 0)
2362 return status;
2363 else if (status & BMSR_LSTATUS)
2364 goto done;
2365 }
2366
2367 /* Read link and autonegotiation status */
2368 status = phy_read(phydev, MII_BMSR);
2369 if (status < 0)
2370 return status;
2371done:
2372 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
2373 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
2374
2375 /* Consider the case that autoneg was started and "aneg complete"
2376 * bit has been reset, but "link up" bit not yet.
2377 */
2378 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
2379 phydev->link = 0;
2380
2381 return 0;
2382}
2383EXPORT_SYMBOL(genphy_update_link);
2384
2385int genphy_read_lpa(struct phy_device *phydev)
2386{
2387 int lpa, lpagb;
2388
2389 if (phydev->autoneg == AUTONEG_ENABLE) {
2390 if (!phydev->autoneg_complete) {
2391 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2392 0);
2393 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
2394 return 0;
2395 }
2396
2397 if (phydev->is_gigabit_capable) {
2398 lpagb = phy_read(phydev, MII_STAT1000);
2399 if (lpagb < 0)
2400 return lpagb;
2401
2402 if (lpagb & LPA_1000MSFAIL) {
2403 int adv = phy_read(phydev, MII_CTRL1000);
2404
2405 if (adv < 0)
2406 return adv;
2407
2408 if (adv & CTL1000_ENABLE_MASTER)
2409 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
2410 else
2411 phydev_err(phydev, "Master/Slave resolution failed\n");
2412 return -ENOLINK;
2413 }
2414
2415 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2416 lpagb);
2417 }
2418
2419 lpa = phy_read(phydev, MII_LPA);
2420 if (lpa < 0)
2421 return lpa;
2422
2423 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
2424 } else {
2425 linkmode_zero(phydev->lp_advertising);
2426 }
2427
2428 return 0;
2429}
2430EXPORT_SYMBOL(genphy_read_lpa);
2431
2432/**
2433 * genphy_read_status_fixed - read the link parameters for !aneg mode
2434 * @phydev: target phy_device struct
2435 *
2436 * Read the current duplex and speed state for a PHY operating with
2437 * autonegotiation disabled.
2438 */
2439int genphy_read_status_fixed(struct phy_device *phydev)
2440{
2441 int bmcr = phy_read(phydev, MII_BMCR);
2442
2443 if (bmcr < 0)
2444 return bmcr;
2445
2446 if (bmcr & BMCR_FULLDPLX)
2447 phydev->duplex = DUPLEX_FULL;
2448 else
2449 phydev->duplex = DUPLEX_HALF;
2450
2451 if (bmcr & BMCR_SPEED1000)
2452 phydev->speed = SPEED_1000;
2453 else if (bmcr & BMCR_SPEED100)
2454 phydev->speed = SPEED_100;
2455 else
2456 phydev->speed = SPEED_10;
2457
2458 return 0;
2459}
2460EXPORT_SYMBOL(genphy_read_status_fixed);
2461
2462/**
2463 * genphy_read_status - check the link status and update current link state
2464 * @phydev: target phy_device struct
2465 *
2466 * Description: Check the link, then figure out the current state
2467 * by comparing what we advertise with what the link partner
2468 * advertises. Start by checking the gigabit possibilities,
2469 * then move on to 10/100.
2470 */
2471int genphy_read_status(struct phy_device *phydev)
2472{
2473 int err, old_link = phydev->link;
2474
2475 /* Update the link, but return if there was an error */
2476 err = genphy_update_link(phydev);
2477 if (err)
2478 return err;
2479
2480 /* why bother the PHY if nothing can have changed */
2481 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2482 return 0;
2483
2484 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
2485 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
2486 phydev->speed = SPEED_UNKNOWN;
2487 phydev->duplex = DUPLEX_UNKNOWN;
2488 phydev->pause = 0;
2489 phydev->asym_pause = 0;
2490
2491 if (phydev->is_gigabit_capable) {
2492 err = genphy_read_master_slave(phydev);
2493 if (err < 0)
2494 return err;
2495 }
2496
2497 err = genphy_read_lpa(phydev);
2498 if (err < 0)
2499 return err;
2500
2501 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2502 phy_resolve_aneg_linkmode(phydev);
2503 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2504 err = genphy_read_status_fixed(phydev);
2505 if (err < 0)
2506 return err;
2507 }
2508
2509 return 0;
2510}
2511EXPORT_SYMBOL(genphy_read_status);
2512
2513/**
2514 * genphy_c37_read_status - check the link status and update current link state
2515 * @phydev: target phy_device struct
2516 *
2517 * Description: Check the link, then figure out the current state
2518 * by comparing what we advertise with what the link partner
2519 * advertises. This function is for Clause 37 1000Base-X mode.
2520 */
2521int genphy_c37_read_status(struct phy_device *phydev)
2522{
2523 int lpa, err, old_link = phydev->link;
2524
2525 /* Update the link, but return if there was an error */
2526 err = genphy_update_link(phydev);
2527 if (err)
2528 return err;
2529
2530 /* why bother the PHY if nothing can have changed */
2531 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2532 return 0;
2533
2534 phydev->duplex = DUPLEX_UNKNOWN;
2535 phydev->pause = 0;
2536 phydev->asym_pause = 0;
2537
2538 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2539 lpa = phy_read(phydev, MII_LPA);
2540 if (lpa < 0)
2541 return lpa;
2542
2543 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2544 phydev->lp_advertising, lpa & LPA_LPACK);
2545 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2546 phydev->lp_advertising, lpa & LPA_1000XFULL);
2547 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2548 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2549 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2550 phydev->lp_advertising,
2551 lpa & LPA_1000XPAUSE_ASYM);
2552
2553 phy_resolve_aneg_linkmode(phydev);
2554 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2555 int bmcr = phy_read(phydev, MII_BMCR);
2556
2557 if (bmcr < 0)
2558 return bmcr;
2559
2560 if (bmcr & BMCR_FULLDPLX)
2561 phydev->duplex = DUPLEX_FULL;
2562 else
2563 phydev->duplex = DUPLEX_HALF;
2564 }
2565
2566 return 0;
2567}
2568EXPORT_SYMBOL(genphy_c37_read_status);
2569
2570/**
2571 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2572 * @phydev: target phy_device struct
2573 *
2574 * Description: Perform a software PHY reset using the standard
2575 * BMCR_RESET bit and poll for the reset bit to be cleared.
2576 *
2577 * Returns: 0 on success, < 0 on failure
2578 */
2579int genphy_soft_reset(struct phy_device *phydev)
2580{
2581 u16 res = BMCR_RESET;
2582 int ret;
2583
2584 if (phydev->autoneg == AUTONEG_ENABLE)
2585 res |= BMCR_ANRESTART;
2586
2587 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2588 if (ret < 0)
2589 return ret;
2590
2591 /* Clause 22 states that setting bit BMCR_RESET sets control registers
2592 * to their default value. Therefore the POWER DOWN bit is supposed to
2593 * be cleared after soft reset.
2594 */
2595 phydev->suspended = 0;
2596
2597 ret = phy_poll_reset(phydev);
2598 if (ret)
2599 return ret;
2600
2601 /* BMCR may be reset to defaults */
2602 if (phydev->autoneg == AUTONEG_DISABLE)
2603 ret = genphy_setup_forced(phydev);
2604
2605 return ret;
2606}
2607EXPORT_SYMBOL(genphy_soft_reset);
2608
2609irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev)
2610{
2611 /* It seems there are cases where the interrupts are handled by another
2612 * entity (ie an IRQ controller embedded inside the PHY) and do not
2613 * need any other interraction from phylib. In this case, just trigger
2614 * the state machine directly.
2615 */
2616 phy_trigger_machine(phydev);
2617
2618 return 0;
2619}
2620EXPORT_SYMBOL(genphy_handle_interrupt_no_ack);
2621
2622/**
2623 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2624 * @phydev: target phy_device struct
2625 *
2626 * Description: Reads the PHY's abilities and populates
2627 * phydev->supported accordingly.
2628 *
2629 * Returns: 0 on success, < 0 on failure
2630 */
2631int genphy_read_abilities(struct phy_device *phydev)
2632{
2633 int val;
2634
2635 linkmode_set_bit_array(phy_basic_ports_array,
2636 ARRAY_SIZE(phy_basic_ports_array),
2637 phydev->supported);
2638
2639 val = phy_read(phydev, MII_BMSR);
2640 if (val < 0)
2641 return val;
2642
2643 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2644 val & BMSR_ANEGCAPABLE);
2645
2646 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2647 val & BMSR_100FULL);
2648 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2649 val & BMSR_100HALF);
2650 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2651 val & BMSR_10FULL);
2652 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2653 val & BMSR_10HALF);
2654
2655 if (val & BMSR_ESTATEN) {
2656 val = phy_read(phydev, MII_ESTATUS);
2657 if (val < 0)
2658 return val;
2659
2660 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2661 phydev->supported, val & ESTATUS_1000_TFULL);
2662 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2663 phydev->supported, val & ESTATUS_1000_THALF);
2664 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2665 phydev->supported, val & ESTATUS_1000_XFULL);
2666 }
2667
2668 /* This is optional functionality. If not supported, we may get an error
2669 * which should be ignored.
2670 */
2671 genphy_c45_read_eee_abilities(phydev);
2672
2673 return 0;
2674}
2675EXPORT_SYMBOL(genphy_read_abilities);
2676
2677/* This is used for the phy device which doesn't support the MMD extended
2678 * register access, but it does have side effect when we are trying to access
2679 * the MMD register via indirect method.
2680 */
2681int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2682{
2683 return -EOPNOTSUPP;
2684}
2685EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2686
2687int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2688 u16 regnum, u16 val)
2689{
2690 return -EOPNOTSUPP;
2691}
2692EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2693
2694int genphy_suspend(struct phy_device *phydev)
2695{
2696 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2697}
2698EXPORT_SYMBOL(genphy_suspend);
2699
2700int genphy_resume(struct phy_device *phydev)
2701{
2702 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2703}
2704EXPORT_SYMBOL(genphy_resume);
2705
2706int genphy_loopback(struct phy_device *phydev, bool enable)
2707{
2708 if (enable) {
2709 u16 val, ctl = BMCR_LOOPBACK;
2710 int ret;
2711
2712 ctl |= mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2713
2714 phy_modify(phydev, MII_BMCR, ~0, ctl);
2715
2716 ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
2717 val & BMSR_LSTATUS,
2718 5000, 500000, true);
2719 if (ret)
2720 return ret;
2721 } else {
2722 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
2723
2724 phy_config_aneg(phydev);
2725 }
2726
2727 return 0;
2728}
2729EXPORT_SYMBOL(genphy_loopback);
2730
2731/**
2732 * phy_remove_link_mode - Remove a supported link mode
2733 * @phydev: phy_device structure to remove link mode from
2734 * @link_mode: Link mode to be removed
2735 *
2736 * Description: Some MACs don't support all link modes which the PHY
2737 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2738 * to remove a link mode.
2739 */
2740void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2741{
2742 linkmode_clear_bit(link_mode, phydev->supported);
2743 phy_advertise_supported(phydev);
2744}
2745EXPORT_SYMBOL(phy_remove_link_mode);
2746
2747static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2748{
2749 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2750 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2751 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2752 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2753}
2754
2755/**
2756 * phy_advertise_supported - Advertise all supported modes
2757 * @phydev: target phy_device struct
2758 *
2759 * Description: Called to advertise all supported modes, doesn't touch
2760 * pause mode advertising.
2761 */
2762void phy_advertise_supported(struct phy_device *phydev)
2763{
2764 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2765
2766 linkmode_copy(new, phydev->supported);
2767 phy_copy_pause_bits(new, phydev->advertising);
2768 linkmode_copy(phydev->advertising, new);
2769}
2770EXPORT_SYMBOL(phy_advertise_supported);
2771
2772/**
2773 * phy_support_sym_pause - Enable support of symmetrical pause
2774 * @phydev: target phy_device struct
2775 *
2776 * Description: Called by the MAC to indicate is supports symmetrical
2777 * Pause, but not asym pause.
2778 */
2779void phy_support_sym_pause(struct phy_device *phydev)
2780{
2781 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
2782 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2783}
2784EXPORT_SYMBOL(phy_support_sym_pause);
2785
2786/**
2787 * phy_support_asym_pause - Enable support of asym pause
2788 * @phydev: target phy_device struct
2789 *
2790 * Description: Called by the MAC to indicate is supports Asym Pause.
2791 */
2792void phy_support_asym_pause(struct phy_device *phydev)
2793{
2794 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2795}
2796EXPORT_SYMBOL(phy_support_asym_pause);
2797
2798/**
2799 * phy_set_sym_pause - Configure symmetric Pause
2800 * @phydev: target phy_device struct
2801 * @rx: Receiver Pause is supported
2802 * @tx: Transmit Pause is supported
2803 * @autoneg: Auto neg should be used
2804 *
2805 * Description: Configure advertised Pause support depending on if
2806 * receiver pause and pause auto neg is supported. Generally called
2807 * from the set_pauseparam .ndo.
2808 */
2809void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
2810 bool autoneg)
2811{
2812 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
2813
2814 if (rx && tx && autoneg)
2815 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2816 phydev->supported);
2817
2818 linkmode_copy(phydev->advertising, phydev->supported);
2819}
2820EXPORT_SYMBOL(phy_set_sym_pause);
2821
2822/**
2823 * phy_set_asym_pause - Configure Pause and Asym Pause
2824 * @phydev: target phy_device struct
2825 * @rx: Receiver Pause is supported
2826 * @tx: Transmit Pause is supported
2827 *
2828 * Description: Configure advertised Pause support depending on if
2829 * transmit and receiver pause is supported. If there has been a
2830 * change in adverting, trigger a new autoneg. Generally called from
2831 * the set_pauseparam .ndo.
2832 */
2833void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
2834{
2835 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
2836
2837 linkmode_copy(oldadv, phydev->advertising);
2838 linkmode_set_pause(phydev->advertising, tx, rx);
2839
2840 if (!linkmode_equal(oldadv, phydev->advertising) &&
2841 phydev->autoneg)
2842 phy_start_aneg(phydev);
2843}
2844EXPORT_SYMBOL(phy_set_asym_pause);
2845
2846/**
2847 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
2848 * @phydev: phy_device struct
2849 * @pp: requested pause configuration
2850 *
2851 * Description: Test if the PHY/MAC combination supports the Pause
2852 * configuration the user is requesting. Returns True if it is
2853 * supported, false otherwise.
2854 */
2855bool phy_validate_pause(struct phy_device *phydev,
2856 struct ethtool_pauseparam *pp)
2857{
2858 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2859 phydev->supported) && pp->rx_pause)
2860 return false;
2861
2862 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2863 phydev->supported) &&
2864 pp->rx_pause != pp->tx_pause)
2865 return false;
2866
2867 return true;
2868}
2869EXPORT_SYMBOL(phy_validate_pause);
2870
2871/**
2872 * phy_get_pause - resolve negotiated pause modes
2873 * @phydev: phy_device struct
2874 * @tx_pause: pointer to bool to indicate whether transmit pause should be
2875 * enabled.
2876 * @rx_pause: pointer to bool to indicate whether receive pause should be
2877 * enabled.
2878 *
2879 * Resolve and return the flow control modes according to the negotiation
2880 * result. This includes checking that we are operating in full duplex mode.
2881 * See linkmode_resolve_pause() for further details.
2882 */
2883void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
2884{
2885 if (phydev->duplex != DUPLEX_FULL) {
2886 *tx_pause = false;
2887 *rx_pause = false;
2888 return;
2889 }
2890
2891 return linkmode_resolve_pause(phydev->advertising,
2892 phydev->lp_advertising,
2893 tx_pause, rx_pause);
2894}
2895EXPORT_SYMBOL(phy_get_pause);
2896
2897#if IS_ENABLED(CONFIG_OF_MDIO)
2898static int phy_get_int_delay_property(struct device *dev, const char *name)
2899{
2900 s32 int_delay;
2901 int ret;
2902
2903 ret = device_property_read_u32(dev, name, &int_delay);
2904 if (ret)
2905 return ret;
2906
2907 return int_delay;
2908}
2909#else
2910static int phy_get_int_delay_property(struct device *dev, const char *name)
2911{
2912 return -EINVAL;
2913}
2914#endif
2915
2916/**
2917 * phy_get_internal_delay - returns the index of the internal delay
2918 * @phydev: phy_device struct
2919 * @dev: pointer to the devices device struct
2920 * @delay_values: array of delays the PHY supports
2921 * @size: the size of the delay array
2922 * @is_rx: boolean to indicate to get the rx internal delay
2923 *
2924 * Returns the index within the array of internal delay passed in.
2925 * If the device property is not present then the interface type is checked
2926 * if the interface defines use of internal delay then a 1 is returned otherwise
2927 * a 0 is returned.
2928 * The array must be in ascending order. If PHY does not have an ascending order
2929 * array then size = 0 and the value of the delay property is returned.
2930 * Return -EINVAL if the delay is invalid or cannot be found.
2931 */
2932s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
2933 const int *delay_values, int size, bool is_rx)
2934{
2935 s32 delay;
2936 int i;
2937
2938 if (is_rx) {
2939 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
2940 if (delay < 0 && size == 0) {
2941 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2942 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
2943 return 1;
2944 else
2945 return 0;
2946 }
2947
2948 } else {
2949 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
2950 if (delay < 0 && size == 0) {
2951 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2952 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
2953 return 1;
2954 else
2955 return 0;
2956 }
2957 }
2958
2959 if (delay < 0)
2960 return delay;
2961
2962 if (delay && size == 0)
2963 return delay;
2964
2965 if (delay < delay_values[0] || delay > delay_values[size - 1]) {
2966 phydev_err(phydev, "Delay %d is out of range\n", delay);
2967 return -EINVAL;
2968 }
2969
2970 if (delay == delay_values[0])
2971 return 0;
2972
2973 for (i = 1; i < size; i++) {
2974 if (delay == delay_values[i])
2975 return i;
2976
2977 /* Find an approximate index by looking up the table */
2978 if (delay > delay_values[i - 1] &&
2979 delay < delay_values[i]) {
2980 if (delay - delay_values[i - 1] <
2981 delay_values[i] - delay)
2982 return i - 1;
2983 else
2984 return i;
2985 }
2986 }
2987
2988 phydev_err(phydev, "error finding internal delay index for %d\n",
2989 delay);
2990
2991 return -EINVAL;
2992}
2993EXPORT_SYMBOL(phy_get_internal_delay);
2994
2995static bool phy_drv_supports_irq(struct phy_driver *phydrv)
2996{
2997 return phydrv->config_intr && phydrv->handle_interrupt;
2998}
2999
3000static int phy_led_set_brightness(struct led_classdev *led_cdev,
3001 enum led_brightness value)
3002{
3003 struct phy_led *phyled = to_phy_led(led_cdev);
3004 struct phy_device *phydev = phyled->phydev;
3005 int err;
3006
3007 mutex_lock(&phydev->lock);
3008 err = phydev->drv->led_brightness_set(phydev, phyled->index, value);
3009 mutex_unlock(&phydev->lock);
3010
3011 return err;
3012}
3013
3014static int phy_led_blink_set(struct led_classdev *led_cdev,
3015 unsigned long *delay_on,
3016 unsigned long *delay_off)
3017{
3018 struct phy_led *phyled = to_phy_led(led_cdev);
3019 struct phy_device *phydev = phyled->phydev;
3020 int err;
3021
3022 mutex_lock(&phydev->lock);
3023 err = phydev->drv->led_blink_set(phydev, phyled->index,
3024 delay_on, delay_off);
3025 mutex_unlock(&phydev->lock);
3026
3027 return err;
3028}
3029
3030static __maybe_unused struct device *
3031phy_led_hw_control_get_device(struct led_classdev *led_cdev)
3032{
3033 struct phy_led *phyled = to_phy_led(led_cdev);
3034 struct phy_device *phydev = phyled->phydev;
3035
3036 if (phydev->attached_dev)
3037 return &phydev->attached_dev->dev;
3038 return NULL;
3039}
3040
3041static int __maybe_unused
3042phy_led_hw_control_get(struct led_classdev *led_cdev,
3043 unsigned long *rules)
3044{
3045 struct phy_led *phyled = to_phy_led(led_cdev);
3046 struct phy_device *phydev = phyled->phydev;
3047 int err;
3048
3049 mutex_lock(&phydev->lock);
3050 err = phydev->drv->led_hw_control_get(phydev, phyled->index, rules);
3051 mutex_unlock(&phydev->lock);
3052
3053 return err;
3054}
3055
3056static int __maybe_unused
3057phy_led_hw_control_set(struct led_classdev *led_cdev,
3058 unsigned long rules)
3059{
3060 struct phy_led *phyled = to_phy_led(led_cdev);
3061 struct phy_device *phydev = phyled->phydev;
3062 int err;
3063
3064 mutex_lock(&phydev->lock);
3065 err = phydev->drv->led_hw_control_set(phydev, phyled->index, rules);
3066 mutex_unlock(&phydev->lock);
3067
3068 return err;
3069}
3070
3071static __maybe_unused int phy_led_hw_is_supported(struct led_classdev *led_cdev,
3072 unsigned long rules)
3073{
3074 struct phy_led *phyled = to_phy_led(led_cdev);
3075 struct phy_device *phydev = phyled->phydev;
3076 int err;
3077
3078 mutex_lock(&phydev->lock);
3079 err = phydev->drv->led_hw_is_supported(phydev, phyled->index, rules);
3080 mutex_unlock(&phydev->lock);
3081
3082 return err;
3083}
3084
3085static void phy_leds_unregister(struct phy_device *phydev)
3086{
3087 struct phy_led *phyled;
3088
3089 list_for_each_entry(phyled, &phydev->leds, list) {
3090 led_classdev_unregister(&phyled->led_cdev);
3091 }
3092}
3093
3094static int of_phy_led(struct phy_device *phydev,
3095 struct device_node *led)
3096{
3097 struct device *dev = &phydev->mdio.dev;
3098 struct led_init_data init_data = {};
3099 struct led_classdev *cdev;
3100 struct phy_led *phyled;
3101 u32 index;
3102 int err;
3103
3104 phyled = devm_kzalloc(dev, sizeof(*phyled), GFP_KERNEL);
3105 if (!phyled)
3106 return -ENOMEM;
3107
3108 cdev = &phyled->led_cdev;
3109 phyled->phydev = phydev;
3110
3111 err = of_property_read_u32(led, "reg", &index);
3112 if (err)
3113 return err;
3114 if (index > U8_MAX)
3115 return -EINVAL;
3116
3117 phyled->index = index;
3118 if (phydev->drv->led_brightness_set)
3119 cdev->brightness_set_blocking = phy_led_set_brightness;
3120 if (phydev->drv->led_blink_set)
3121 cdev->blink_set = phy_led_blink_set;
3122
3123#ifdef CONFIG_LEDS_TRIGGERS
3124 if (phydev->drv->led_hw_is_supported &&
3125 phydev->drv->led_hw_control_set &&
3126 phydev->drv->led_hw_control_get) {
3127 cdev->hw_control_is_supported = phy_led_hw_is_supported;
3128 cdev->hw_control_set = phy_led_hw_control_set;
3129 cdev->hw_control_get = phy_led_hw_control_get;
3130 cdev->hw_control_trigger = "netdev";
3131 }
3132
3133 cdev->hw_control_get_device = phy_led_hw_control_get_device;
3134#endif
3135 cdev->max_brightness = 1;
3136 init_data.devicename = dev_name(&phydev->mdio.dev);
3137 init_data.fwnode = of_fwnode_handle(led);
3138 init_data.devname_mandatory = true;
3139
3140 err = led_classdev_register_ext(dev, cdev, &init_data);
3141 if (err)
3142 return err;
3143
3144 list_add(&phyled->list, &phydev->leds);
3145
3146 return 0;
3147}
3148
3149static int of_phy_leds(struct phy_device *phydev)
3150{
3151 struct device_node *node = phydev->mdio.dev.of_node;
3152 struct device_node *leds, *led;
3153 int err;
3154
3155 if (!IS_ENABLED(CONFIG_OF_MDIO))
3156 return 0;
3157
3158 if (!node)
3159 return 0;
3160
3161 leds = of_get_child_by_name(node, "leds");
3162 if (!leds)
3163 return 0;
3164
3165 for_each_available_child_of_node(leds, led) {
3166 err = of_phy_led(phydev, led);
3167 if (err) {
3168 of_node_put(led);
3169 phy_leds_unregister(phydev);
3170 return err;
3171 }
3172 }
3173
3174 return 0;
3175}
3176
3177/**
3178 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device
3179 * @fwnode: pointer to the mdio_device's fwnode
3180 *
3181 * If successful, returns a pointer to the mdio_device with the embedded
3182 * struct device refcount incremented by one, or NULL on failure.
3183 * The caller should call put_device() on the mdio_device after its use.
3184 */
3185struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
3186{
3187 struct device *d;
3188
3189 if (!fwnode)
3190 return NULL;
3191
3192 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode);
3193 if (!d)
3194 return NULL;
3195
3196 return to_mdio_device(d);
3197}
3198EXPORT_SYMBOL(fwnode_mdio_find_device);
3199
3200/**
3201 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.
3202 *
3203 * @phy_fwnode: Pointer to the phy's fwnode.
3204 *
3205 * If successful, returns a pointer to the phy_device with the embedded
3206 * struct device refcount incremented by one, or NULL on failure.
3207 */
3208struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
3209{
3210 struct mdio_device *mdiodev;
3211
3212 mdiodev = fwnode_mdio_find_device(phy_fwnode);
3213 if (!mdiodev)
3214 return NULL;
3215
3216 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
3217 return to_phy_device(&mdiodev->dev);
3218
3219 put_device(&mdiodev->dev);
3220
3221 return NULL;
3222}
3223EXPORT_SYMBOL(fwnode_phy_find_device);
3224
3225/**
3226 * device_phy_find_device - For the given device, get the phy_device
3227 * @dev: Pointer to the given device
3228 *
3229 * Refer return conditions of fwnode_phy_find_device().
3230 */
3231struct phy_device *device_phy_find_device(struct device *dev)
3232{
3233 return fwnode_phy_find_device(dev_fwnode(dev));
3234}
3235EXPORT_SYMBOL_GPL(device_phy_find_device);
3236
3237/**
3238 * fwnode_get_phy_node - Get the phy_node using the named reference.
3239 * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
3240 *
3241 * Refer return conditions of fwnode_find_reference().
3242 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"
3243 * and "phy-device" are not supported in ACPI. DT supports all the three
3244 * named references to the phy node.
3245 */
3246struct fwnode_handle *fwnode_get_phy_node(const struct fwnode_handle *fwnode)
3247{
3248 struct fwnode_handle *phy_node;
3249
3250 /* Only phy-handle is used for ACPI */
3251 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
3252 if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
3253 return phy_node;
3254 phy_node = fwnode_find_reference(fwnode, "phy", 0);
3255 if (IS_ERR(phy_node))
3256 phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
3257 return phy_node;
3258}
3259EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
3260
3261/**
3262 * phy_probe - probe and init a PHY device
3263 * @dev: device to probe and init
3264 *
3265 * Take care of setting up the phy_device structure, set the state to READY.
3266 */
3267static int phy_probe(struct device *dev)
3268{
3269 struct phy_device *phydev = to_phy_device(dev);
3270 struct device_driver *drv = phydev->mdio.dev.driver;
3271 struct phy_driver *phydrv = to_phy_driver(drv);
3272 int err = 0;
3273
3274 phydev->drv = phydrv;
3275
3276 /* Disable the interrupt if the PHY doesn't support it
3277 * but the interrupt is still a valid one
3278 */
3279 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
3280 phydev->irq = PHY_POLL;
3281
3282 if (phydrv->flags & PHY_IS_INTERNAL)
3283 phydev->is_internal = true;
3284
3285 /* Deassert the reset signal */
3286 phy_device_reset(phydev, 0);
3287
3288 if (phydev->drv->probe) {
3289 err = phydev->drv->probe(phydev);
3290 if (err)
3291 goto out;
3292 }
3293
3294 phy_disable_interrupts(phydev);
3295
3296 /* Start out supporting everything. Eventually,
3297 * a controller will attach, and may modify one
3298 * or both of these values
3299 */
3300 if (phydrv->features) {
3301 linkmode_copy(phydev->supported, phydrv->features);
3302 genphy_c45_read_eee_abilities(phydev);
3303 }
3304 else if (phydrv->get_features)
3305 err = phydrv->get_features(phydev);
3306 else if (phydev->is_c45)
3307 err = genphy_c45_pma_read_abilities(phydev);
3308 else
3309 err = genphy_read_abilities(phydev);
3310
3311 if (err)
3312 goto out;
3313
3314 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
3315 phydev->supported))
3316 phydev->autoneg = 0;
3317
3318 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
3319 phydev->supported))
3320 phydev->is_gigabit_capable = 1;
3321 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
3322 phydev->supported))
3323 phydev->is_gigabit_capable = 1;
3324
3325 of_set_phy_supported(phydev);
3326 phy_advertise_supported(phydev);
3327
3328 /* Get PHY default EEE advertising modes and handle them as potentially
3329 * safe initial configuration.
3330 */
3331 err = genphy_c45_read_eee_adv(phydev, phydev->advertising_eee);
3332 if (err)
3333 goto out;
3334
3335 /* There is no "enabled" flag. If PHY is advertising, assume it is
3336 * kind of enabled.
3337 */
3338 phydev->eee_enabled = !linkmode_empty(phydev->advertising_eee);
3339
3340 /* Some PHYs may advertise, by default, not support EEE modes. So,
3341 * we need to clean them.
3342 */
3343 if (phydev->eee_enabled)
3344 linkmode_and(phydev->advertising_eee, phydev->supported_eee,
3345 phydev->advertising_eee);
3346
3347 /* Get the EEE modes we want to prohibit. We will ask
3348 * the PHY stop advertising these mode later on
3349 */
3350 of_set_phy_eee_broken(phydev);
3351
3352 /* The Pause Frame bits indicate that the PHY can support passing
3353 * pause frames. During autonegotiation, the PHYs will determine if
3354 * they should allow pause frames to pass. The MAC driver should then
3355 * use that result to determine whether to enable flow control via
3356 * pause frames.
3357 *
3358 * Normally, PHY drivers should not set the Pause bits, and instead
3359 * allow phylib to do that. However, there may be some situations
3360 * (e.g. hardware erratum) where the driver wants to set only one
3361 * of these bits.
3362 */
3363 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
3364 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
3365 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3366 phydev->supported);
3367 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3368 phydev->supported);
3369 }
3370
3371 /* Set the state to READY by default */
3372 phydev->state = PHY_READY;
3373
3374 /* Get the LEDs from the device tree, and instantiate standard
3375 * LEDs for them.
3376 */
3377 if (IS_ENABLED(CONFIG_PHYLIB_LEDS))
3378 err = of_phy_leds(phydev);
3379
3380out:
3381 /* Re-assert the reset signal on error */
3382 if (err)
3383 phy_device_reset(phydev, 1);
3384
3385 return err;
3386}
3387
3388static int phy_remove(struct device *dev)
3389{
3390 struct phy_device *phydev = to_phy_device(dev);
3391
3392 cancel_delayed_work_sync(&phydev->state_queue);
3393
3394 if (IS_ENABLED(CONFIG_PHYLIB_LEDS))
3395 phy_leds_unregister(phydev);
3396
3397 phydev->state = PHY_DOWN;
3398
3399 sfp_bus_del_upstream(phydev->sfp_bus);
3400 phydev->sfp_bus = NULL;
3401
3402 if (phydev->drv && phydev->drv->remove)
3403 phydev->drv->remove(phydev);
3404
3405 /* Assert the reset signal */
3406 phy_device_reset(phydev, 1);
3407
3408 phydev->drv = NULL;
3409
3410 return 0;
3411}
3412
3413/**
3414 * phy_driver_register - register a phy_driver with the PHY layer
3415 * @new_driver: new phy_driver to register
3416 * @owner: module owning this PHY
3417 */
3418int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
3419{
3420 int retval;
3421
3422 /* Either the features are hard coded, or dynamically
3423 * determined. It cannot be both.
3424 */
3425 if (WARN_ON(new_driver->features && new_driver->get_features)) {
3426 pr_err("%s: features and get_features must not both be set\n",
3427 new_driver->name);
3428 return -EINVAL;
3429 }
3430
3431 /* PHYLIB device drivers must not match using a DT compatible table
3432 * as this bypasses our checks that the mdiodev that is being matched
3433 * is backed by a struct phy_device. If such a case happens, we will
3434 * make out-of-bounds accesses and lockup in phydev->lock.
3435 */
3436 if (WARN(new_driver->mdiodrv.driver.of_match_table,
3437 "%s: driver must not provide a DT match table\n",
3438 new_driver->name))
3439 return -EINVAL;
3440
3441 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
3442 new_driver->mdiodrv.driver.name = new_driver->name;
3443 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
3444 new_driver->mdiodrv.driver.probe = phy_probe;
3445 new_driver->mdiodrv.driver.remove = phy_remove;
3446 new_driver->mdiodrv.driver.owner = owner;
3447 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
3448
3449 retval = driver_register(&new_driver->mdiodrv.driver);
3450 if (retval) {
3451 pr_err("%s: Error %d in registering driver\n",
3452 new_driver->name, retval);
3453
3454 return retval;
3455 }
3456
3457 pr_debug("%s: Registered new driver\n", new_driver->name);
3458
3459 return 0;
3460}
3461EXPORT_SYMBOL(phy_driver_register);
3462
3463int phy_drivers_register(struct phy_driver *new_driver, int n,
3464 struct module *owner)
3465{
3466 int i, ret = 0;
3467
3468 for (i = 0; i < n; i++) {
3469 ret = phy_driver_register(new_driver + i, owner);
3470 if (ret) {
3471 while (i-- > 0)
3472 phy_driver_unregister(new_driver + i);
3473 break;
3474 }
3475 }
3476 return ret;
3477}
3478EXPORT_SYMBOL(phy_drivers_register);
3479
3480void phy_driver_unregister(struct phy_driver *drv)
3481{
3482 driver_unregister(&drv->mdiodrv.driver);
3483}
3484EXPORT_SYMBOL(phy_driver_unregister);
3485
3486void phy_drivers_unregister(struct phy_driver *drv, int n)
3487{
3488 int i;
3489
3490 for (i = 0; i < n; i++)
3491 phy_driver_unregister(drv + i);
3492}
3493EXPORT_SYMBOL(phy_drivers_unregister);
3494
3495static struct phy_driver genphy_driver = {
3496 .phy_id = 0xffffffff,
3497 .phy_id_mask = 0xffffffff,
3498 .name = "Generic PHY",
3499 .get_features = genphy_read_abilities,
3500 .suspend = genphy_suspend,
3501 .resume = genphy_resume,
3502 .set_loopback = genphy_loopback,
3503};
3504
3505static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
3506 .get_sset_count = phy_ethtool_get_sset_count,
3507 .get_strings = phy_ethtool_get_strings,
3508 .get_stats = phy_ethtool_get_stats,
3509 .get_plca_cfg = phy_ethtool_get_plca_cfg,
3510 .set_plca_cfg = phy_ethtool_set_plca_cfg,
3511 .get_plca_status = phy_ethtool_get_plca_status,
3512 .start_cable_test = phy_start_cable_test,
3513 .start_cable_test_tdr = phy_start_cable_test_tdr,
3514};
3515
3516static const struct phylib_stubs __phylib_stubs = {
3517 .hwtstamp_get = __phy_hwtstamp_get,
3518 .hwtstamp_set = __phy_hwtstamp_set,
3519};
3520
3521static void phylib_register_stubs(void)
3522{
3523 phylib_stubs = &__phylib_stubs;
3524}
3525
3526static void phylib_unregister_stubs(void)
3527{
3528 phylib_stubs = NULL;
3529}
3530
3531static int __init phy_init(void)
3532{
3533 int rc;
3534
3535 rtnl_lock();
3536 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
3537 phylib_register_stubs();
3538 rtnl_unlock();
3539
3540 rc = mdio_bus_init();
3541 if (rc)
3542 goto err_ethtool_phy_ops;
3543
3544 features_init();
3545
3546 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
3547 if (rc)
3548 goto err_mdio_bus;
3549
3550 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
3551 if (rc)
3552 goto err_c45;
3553
3554 return 0;
3555
3556err_c45:
3557 phy_driver_unregister(&genphy_c45_driver);
3558err_mdio_bus:
3559 mdio_bus_exit();
3560err_ethtool_phy_ops:
3561 rtnl_lock();
3562 phylib_unregister_stubs();
3563 ethtool_set_ethtool_phy_ops(NULL);
3564 rtnl_unlock();
3565
3566 return rc;
3567}
3568
3569static void __exit phy_exit(void)
3570{
3571 phy_driver_unregister(&genphy_c45_driver);
3572 phy_driver_unregister(&genphy_driver);
3573 mdio_bus_exit();
3574 rtnl_lock();
3575 phylib_unregister_stubs();
3576 ethtool_set_ethtool_phy_ops(NULL);
3577 rtnl_unlock();
3578}
3579
3580subsys_initcall(phy_init);
3581module_exit(phy_exit);