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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/* Framework for finding and configuring PHYs.
2 * Also contains generic PHY driver
3 *
4 * Author: Andy Fleming
5 *
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
12 *
13 */
14
15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16
17#include <linux/kernel.h>
18#include <linux/string.h>
19#include <linux/errno.h>
20#include <linux/unistd.h>
21#include <linux/slab.h>
22#include <linux/interrupt.h>
23#include <linux/init.h>
24#include <linux/delay.h>
25#include <linux/netdevice.h>
26#include <linux/etherdevice.h>
27#include <linux/skbuff.h>
28#include <linux/mm.h>
29#include <linux/module.h>
30#include <linux/mii.h>
31#include <linux/ethtool.h>
32#include <linux/phy.h>
33#include <linux/phy_led_triggers.h>
34#include <linux/mdio.h>
35#include <linux/io.h>
36#include <linux/uaccess.h>
37#include <linux/of.h>
38
39#include <asm/irq.h>
40
41MODULE_DESCRIPTION("PHY library");
42MODULE_AUTHOR("Andy Fleming");
43MODULE_LICENSE("GPL");
44
45void phy_device_free(struct phy_device *phydev)
46{
47 put_device(&phydev->mdio.dev);
48}
49EXPORT_SYMBOL(phy_device_free);
50
51static void phy_mdio_device_free(struct mdio_device *mdiodev)
52{
53 struct phy_device *phydev;
54
55 phydev = container_of(mdiodev, struct phy_device, mdio);
56 phy_device_free(phydev);
57}
58
59static void phy_device_release(struct device *dev)
60{
61 kfree(to_phy_device(dev));
62}
63
64static void phy_mdio_device_remove(struct mdio_device *mdiodev)
65{
66 struct phy_device *phydev;
67
68 phydev = container_of(mdiodev, struct phy_device, mdio);
69 phy_device_remove(phydev);
70}
71
72static struct phy_driver genphy_driver;
73extern struct phy_driver genphy_10g_driver;
74
75static LIST_HEAD(phy_fixup_list);
76static DEFINE_MUTEX(phy_fixup_lock);
77
78#ifdef CONFIG_PM
79static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
80{
81 struct device_driver *drv = phydev->mdio.dev.driver;
82 struct phy_driver *phydrv = to_phy_driver(drv);
83 struct net_device *netdev = phydev->attached_dev;
84
85 if (!drv || !phydrv->suspend)
86 return false;
87
88 /* PHY not attached? May suspend if the PHY has not already been
89 * suspended as part of a prior call to phy_disconnect() ->
90 * phy_detach() -> phy_suspend() because the parent netdev might be the
91 * MDIO bus driver and clock gated at this point.
92 */
93 if (!netdev)
94 return !phydev->suspended;
95
96 /* Don't suspend PHY if the attached netdev parent may wakeup.
97 * The parent may point to a PCI device, as in tg3 driver.
98 */
99 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
100 return false;
101
102 /* Also don't suspend PHY if the netdev itself may wakeup. This
103 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
104 * e.g. SoC devices.
105 */
106 if (device_may_wakeup(&netdev->dev))
107 return false;
108
109 return true;
110}
111
112static int mdio_bus_phy_suspend(struct device *dev)
113{
114 struct phy_device *phydev = to_phy_device(dev);
115
116 /* We must stop the state machine manually, otherwise it stops out of
117 * control, possibly with the phydev->lock held. Upon resume, netdev
118 * may call phy routines that try to grab the same lock, and that may
119 * lead to a deadlock.
120 */
121 if (phydev->attached_dev && phydev->adjust_link)
122 phy_stop_machine(phydev);
123
124 if (!mdio_bus_phy_may_suspend(phydev))
125 return 0;
126
127 return phy_suspend(phydev);
128}
129
130static int mdio_bus_phy_resume(struct device *dev)
131{
132 struct phy_device *phydev = to_phy_device(dev);
133 int ret;
134
135 if (!mdio_bus_phy_may_suspend(phydev))
136 goto no_resume;
137
138 ret = phy_resume(phydev);
139 if (ret < 0)
140 return ret;
141
142no_resume:
143 if (phydev->attached_dev && phydev->adjust_link)
144 phy_start_machine(phydev);
145
146 return 0;
147}
148
149static int mdio_bus_phy_restore(struct device *dev)
150{
151 struct phy_device *phydev = to_phy_device(dev);
152 struct net_device *netdev = phydev->attached_dev;
153 int ret;
154
155 if (!netdev)
156 return 0;
157
158 ret = phy_init_hw(phydev);
159 if (ret < 0)
160 return ret;
161
162 /* The PHY needs to renegotiate. */
163 phydev->link = 0;
164 phydev->state = PHY_UP;
165
166 phy_start_machine(phydev);
167
168 return 0;
169}
170
171static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
172 .suspend = mdio_bus_phy_suspend,
173 .resume = mdio_bus_phy_resume,
174 .freeze = mdio_bus_phy_suspend,
175 .thaw = mdio_bus_phy_resume,
176 .restore = mdio_bus_phy_restore,
177};
178
179#define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
180
181#else
182
183#define MDIO_BUS_PHY_PM_OPS NULL
184
185#endif /* CONFIG_PM */
186
187/**
188 * phy_register_fixup - creates a new phy_fixup and adds it to the list
189 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
190 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
191 * It can also be PHY_ANY_UID
192 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
193 * comparison
194 * @run: The actual code to be run when a matching PHY is found
195 */
196int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
197 int (*run)(struct phy_device *))
198{
199 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
200
201 if (!fixup)
202 return -ENOMEM;
203
204 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
205 fixup->phy_uid = phy_uid;
206 fixup->phy_uid_mask = phy_uid_mask;
207 fixup->run = run;
208
209 mutex_lock(&phy_fixup_lock);
210 list_add_tail(&fixup->list, &phy_fixup_list);
211 mutex_unlock(&phy_fixup_lock);
212
213 return 0;
214}
215EXPORT_SYMBOL(phy_register_fixup);
216
217/* Registers a fixup to be run on any PHY with the UID in phy_uid */
218int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
219 int (*run)(struct phy_device *))
220{
221 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
222}
223EXPORT_SYMBOL(phy_register_fixup_for_uid);
224
225/* Registers a fixup to be run on the PHY with id string bus_id */
226int phy_register_fixup_for_id(const char *bus_id,
227 int (*run)(struct phy_device *))
228{
229 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
230}
231EXPORT_SYMBOL(phy_register_fixup_for_id);
232
233/**
234 * phy_unregister_fixup - remove a phy_fixup from the list
235 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
236 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
237 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
238 */
239int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
240{
241 struct list_head *pos, *n;
242 struct phy_fixup *fixup;
243 int ret;
244
245 ret = -ENODEV;
246
247 mutex_lock(&phy_fixup_lock);
248 list_for_each_safe(pos, n, &phy_fixup_list) {
249 fixup = list_entry(pos, struct phy_fixup, list);
250
251 if ((!strcmp(fixup->bus_id, bus_id)) &&
252 ((fixup->phy_uid & phy_uid_mask) ==
253 (phy_uid & phy_uid_mask))) {
254 list_del(&fixup->list);
255 kfree(fixup);
256 ret = 0;
257 break;
258 }
259 }
260 mutex_unlock(&phy_fixup_lock);
261
262 return ret;
263}
264EXPORT_SYMBOL(phy_unregister_fixup);
265
266/* Unregisters a fixup of any PHY with the UID in phy_uid */
267int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
268{
269 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
270}
271EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
272
273/* Unregisters a fixup of the PHY with id string bus_id */
274int phy_unregister_fixup_for_id(const char *bus_id)
275{
276 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
277}
278EXPORT_SYMBOL(phy_unregister_fixup_for_id);
279
280/* Returns 1 if fixup matches phydev in bus_id and phy_uid.
281 * Fixups can be set to match any in one or more fields.
282 */
283static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
284{
285 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
286 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
287 return 0;
288
289 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
290 (phydev->phy_id & fixup->phy_uid_mask))
291 if (fixup->phy_uid != PHY_ANY_UID)
292 return 0;
293
294 return 1;
295}
296
297/* Runs any matching fixups for this phydev */
298static int phy_scan_fixups(struct phy_device *phydev)
299{
300 struct phy_fixup *fixup;
301
302 mutex_lock(&phy_fixup_lock);
303 list_for_each_entry(fixup, &phy_fixup_list, list) {
304 if (phy_needs_fixup(phydev, fixup)) {
305 int err = fixup->run(phydev);
306
307 if (err < 0) {
308 mutex_unlock(&phy_fixup_lock);
309 return err;
310 }
311 phydev->has_fixups = true;
312 }
313 }
314 mutex_unlock(&phy_fixup_lock);
315
316 return 0;
317}
318
319static int phy_bus_match(struct device *dev, struct device_driver *drv)
320{
321 struct phy_device *phydev = to_phy_device(dev);
322 struct phy_driver *phydrv = to_phy_driver(drv);
323 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
324 int i;
325
326 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
327 return 0;
328
329 if (phydrv->match_phy_device)
330 return phydrv->match_phy_device(phydev);
331
332 if (phydev->is_c45) {
333 for (i = 1; i < num_ids; i++) {
334 if (!(phydev->c45_ids.devices_in_package & (1 << i)))
335 continue;
336
337 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
338 (phydev->c45_ids.device_ids[i] &
339 phydrv->phy_id_mask))
340 return 1;
341 }
342 return 0;
343 } else {
344 return (phydrv->phy_id & phydrv->phy_id_mask) ==
345 (phydev->phy_id & phydrv->phy_id_mask);
346 }
347}
348
349struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
350 bool is_c45,
351 struct phy_c45_device_ids *c45_ids)
352{
353 struct phy_device *dev;
354 struct mdio_device *mdiodev;
355
356 /* We allocate the device, and initialize the default values */
357 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
358 if (!dev)
359 return ERR_PTR(-ENOMEM);
360
361 mdiodev = &dev->mdio;
362 mdiodev->dev.release = phy_device_release;
363 mdiodev->dev.parent = &bus->dev;
364 mdiodev->dev.bus = &mdio_bus_type;
365 mdiodev->bus = bus;
366 mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS;
367 mdiodev->bus_match = phy_bus_match;
368 mdiodev->addr = addr;
369 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
370 mdiodev->device_free = phy_mdio_device_free;
371 mdiodev->device_remove = phy_mdio_device_remove;
372
373 dev->speed = 0;
374 dev->duplex = -1;
375 dev->pause = 0;
376 dev->asym_pause = 0;
377 dev->link = 0;
378 dev->interface = PHY_INTERFACE_MODE_GMII;
379
380 dev->autoneg = AUTONEG_ENABLE;
381
382 dev->is_c45 = is_c45;
383 dev->phy_id = phy_id;
384 if (c45_ids)
385 dev->c45_ids = *c45_ids;
386 dev->irq = bus->irq[addr];
387 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
388
389 dev->state = PHY_DOWN;
390
391 mutex_init(&dev->lock);
392 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
393 INIT_WORK(&dev->phy_queue, phy_change_work);
394
395 /* Request the appropriate module unconditionally; don't
396 * bother trying to do so only if it isn't already loaded,
397 * because that gets complicated. A hotplug event would have
398 * done an unconditional modprobe anyway.
399 * We don't do normal hotplug because it won't work for MDIO
400 * -- because it relies on the device staying around for long
401 * enough for the driver to get loaded. With MDIO, the NIC
402 * driver will get bored and give up as soon as it finds that
403 * there's no driver _already_ loaded.
404 */
405 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
406
407 device_initialize(&mdiodev->dev);
408
409 return dev;
410}
411EXPORT_SYMBOL(phy_device_create);
412
413/* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
414 * @bus: the target MII bus
415 * @addr: PHY address on the MII bus
416 * @dev_addr: MMD address in the PHY.
417 * @devices_in_package: where to store the devices in package information.
418 *
419 * Description: reads devices in package registers of a MMD at @dev_addr
420 * from PHY at @addr on @bus.
421 *
422 * Returns: 0 on success, -EIO on failure.
423 */
424static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
425 u32 *devices_in_package)
426{
427 int phy_reg, reg_addr;
428
429 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
430 phy_reg = mdiobus_read(bus, addr, reg_addr);
431 if (phy_reg < 0)
432 return -EIO;
433 *devices_in_package = (phy_reg & 0xffff) << 16;
434
435 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
436 phy_reg = mdiobus_read(bus, addr, reg_addr);
437 if (phy_reg < 0)
438 return -EIO;
439 *devices_in_package |= (phy_reg & 0xffff);
440
441 return 0;
442}
443
444/**
445 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
446 * @bus: the target MII bus
447 * @addr: PHY address on the MII bus
448 * @phy_id: where to store the ID retrieved.
449 * @c45_ids: where to store the c45 ID information.
450 *
451 * If the PHY devices-in-package appears to be valid, it and the
452 * corresponding identifiers are stored in @c45_ids, zero is stored
453 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
454 * zero on success.
455 *
456 */
457static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
458 struct phy_c45_device_ids *c45_ids) {
459 int phy_reg;
460 int i, reg_addr;
461 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
462 u32 *devs = &c45_ids->devices_in_package;
463
464 /* Find first non-zero Devices In package. Device zero is reserved
465 * for 802.3 c45 complied PHYs, so don't probe it at first.
466 */
467 for (i = 1; i < num_ids && *devs == 0; i++) {
468 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
469 if (phy_reg < 0)
470 return -EIO;
471
472 if ((*devs & 0x1fffffff) == 0x1fffffff) {
473 /* If mostly Fs, there is no device there,
474 * then let's continue to probe more, as some
475 * 10G PHYs have zero Devices In package,
476 * e.g. Cortina CS4315/CS4340 PHY.
477 */
478 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
479 if (phy_reg < 0)
480 return -EIO;
481 /* no device there, let's get out of here */
482 if ((*devs & 0x1fffffff) == 0x1fffffff) {
483 *phy_id = 0xffffffff;
484 return 0;
485 } else {
486 break;
487 }
488 }
489 }
490
491 /* Now probe Device Identifiers for each device present. */
492 for (i = 1; i < num_ids; i++) {
493 if (!(c45_ids->devices_in_package & (1 << i)))
494 continue;
495
496 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
497 phy_reg = mdiobus_read(bus, addr, reg_addr);
498 if (phy_reg < 0)
499 return -EIO;
500 c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
501
502 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
503 phy_reg = mdiobus_read(bus, addr, reg_addr);
504 if (phy_reg < 0)
505 return -EIO;
506 c45_ids->device_ids[i] |= (phy_reg & 0xffff);
507 }
508 *phy_id = 0;
509 return 0;
510}
511
512/**
513 * get_phy_id - reads the specified addr for its ID.
514 * @bus: the target MII bus
515 * @addr: PHY address on the MII bus
516 * @phy_id: where to store the ID retrieved.
517 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
518 * @c45_ids: where to store the c45 ID information.
519 *
520 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
521 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
522 * zero on success.
523 *
524 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
525 * its return value is in turn returned.
526 *
527 */
528static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
529 bool is_c45, struct phy_c45_device_ids *c45_ids)
530{
531 int phy_reg;
532
533 if (is_c45)
534 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
535
536 /* Grab the bits from PHYIR1, and put them in the upper half */
537 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
538 if (phy_reg < 0) {
539 /* if there is no device, return without an error so scanning
540 * the bus works properly
541 */
542 if (phy_reg == -EIO || phy_reg == -ENODEV) {
543 *phy_id = 0xffffffff;
544 return 0;
545 }
546
547 return -EIO;
548 }
549
550 *phy_id = (phy_reg & 0xffff) << 16;
551
552 /* Grab the bits from PHYIR2, and put them in the lower half */
553 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
554 if (phy_reg < 0)
555 return -EIO;
556
557 *phy_id |= (phy_reg & 0xffff);
558
559 return 0;
560}
561
562/**
563 * get_phy_device - reads the specified PHY device and returns its @phy_device
564 * struct
565 * @bus: the target MII bus
566 * @addr: PHY address on the MII bus
567 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
568 *
569 * Description: Reads the ID registers of the PHY at @addr on the
570 * @bus, then allocates and returns the phy_device to represent it.
571 */
572struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
573{
574 struct phy_c45_device_ids c45_ids = {0};
575 u32 phy_id = 0;
576 int r;
577
578 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
579 if (r)
580 return ERR_PTR(r);
581
582 /* If the phy_id is mostly Fs, there is no device there */
583 if ((phy_id & 0x1fffffff) == 0x1fffffff)
584 return ERR_PTR(-ENODEV);
585
586 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
587}
588EXPORT_SYMBOL(get_phy_device);
589
590static ssize_t
591phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
592{
593 struct phy_device *phydev = to_phy_device(dev);
594
595 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
596}
597static DEVICE_ATTR_RO(phy_id);
598
599static ssize_t
600phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
601{
602 struct phy_device *phydev = to_phy_device(dev);
603 const char *mode = NULL;
604
605 if (phy_is_internal(phydev))
606 mode = "internal";
607 else
608 mode = phy_modes(phydev->interface);
609
610 return sprintf(buf, "%s\n", mode);
611}
612static DEVICE_ATTR_RO(phy_interface);
613
614static ssize_t
615phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
616 char *buf)
617{
618 struct phy_device *phydev = to_phy_device(dev);
619
620 return sprintf(buf, "%d\n", phydev->has_fixups);
621}
622static DEVICE_ATTR_RO(phy_has_fixups);
623
624static struct attribute *phy_dev_attrs[] = {
625 &dev_attr_phy_id.attr,
626 &dev_attr_phy_interface.attr,
627 &dev_attr_phy_has_fixups.attr,
628 NULL,
629};
630ATTRIBUTE_GROUPS(phy_dev);
631
632/**
633 * phy_device_register - Register the phy device on the MDIO bus
634 * @phydev: phy_device structure to be added to the MDIO bus
635 */
636int phy_device_register(struct phy_device *phydev)
637{
638 int err;
639
640 err = mdiobus_register_device(&phydev->mdio);
641 if (err)
642 return err;
643
644 /* Deassert the reset signal */
645 phy_device_reset(phydev, 0);
646
647 /* Run all of the fixups for this PHY */
648 err = phy_scan_fixups(phydev);
649 if (err) {
650 pr_err("PHY %d failed to initialize\n", phydev->mdio.addr);
651 goto out;
652 }
653
654 phydev->mdio.dev.groups = phy_dev_groups;
655
656 err = device_add(&phydev->mdio.dev);
657 if (err) {
658 pr_err("PHY %d failed to add\n", phydev->mdio.addr);
659 goto out;
660 }
661
662 return 0;
663
664 out:
665 /* Assert the reset signal */
666 phy_device_reset(phydev, 1);
667
668 mdiobus_unregister_device(&phydev->mdio);
669 return err;
670}
671EXPORT_SYMBOL(phy_device_register);
672
673/**
674 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
675 * @phydev: phy_device structure to remove
676 *
677 * This doesn't free the phy_device itself, it merely reverses the effects
678 * of phy_device_register(). Use phy_device_free() to free the device
679 * after calling this function.
680 */
681void phy_device_remove(struct phy_device *phydev)
682{
683 device_del(&phydev->mdio.dev);
684
685 /* Assert the reset signal */
686 phy_device_reset(phydev, 1);
687
688 mdiobus_unregister_device(&phydev->mdio);
689}
690EXPORT_SYMBOL(phy_device_remove);
691
692/**
693 * phy_find_first - finds the first PHY device on the bus
694 * @bus: the target MII bus
695 */
696struct phy_device *phy_find_first(struct mii_bus *bus)
697{
698 struct phy_device *phydev;
699 int addr;
700
701 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
702 phydev = mdiobus_get_phy(bus, addr);
703 if (phydev)
704 return phydev;
705 }
706 return NULL;
707}
708EXPORT_SYMBOL(phy_find_first);
709
710static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
711{
712 struct net_device *netdev = phydev->attached_dev;
713
714 if (do_carrier) {
715 if (up)
716 netif_carrier_on(netdev);
717 else
718 netif_carrier_off(netdev);
719 }
720 phydev->adjust_link(netdev);
721}
722
723/**
724 * phy_prepare_link - prepares the PHY layer to monitor link status
725 * @phydev: target phy_device struct
726 * @handler: callback function for link status change notifications
727 *
728 * Description: Tells the PHY infrastructure to handle the
729 * gory details on monitoring link status (whether through
730 * polling or an interrupt), and to call back to the
731 * connected device driver when the link status changes.
732 * If you want to monitor your own link state, don't call
733 * this function.
734 */
735static void phy_prepare_link(struct phy_device *phydev,
736 void (*handler)(struct net_device *))
737{
738 phydev->adjust_link = handler;
739}
740
741/**
742 * phy_connect_direct - connect an ethernet device to a specific phy_device
743 * @dev: the network device to connect
744 * @phydev: the pointer to the phy device
745 * @handler: callback function for state change notifications
746 * @interface: PHY device's interface
747 */
748int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
749 void (*handler)(struct net_device *),
750 phy_interface_t interface)
751{
752 int rc;
753
754 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
755 if (rc)
756 return rc;
757
758 phy_prepare_link(phydev, handler);
759 phy_start_machine(phydev);
760 if (phydev->irq > 0)
761 phy_start_interrupts(phydev);
762
763 return 0;
764}
765EXPORT_SYMBOL(phy_connect_direct);
766
767/**
768 * phy_connect - connect an ethernet device to a PHY device
769 * @dev: the network device to connect
770 * @bus_id: the id string of the PHY device to connect
771 * @handler: callback function for state change notifications
772 * @interface: PHY device's interface
773 *
774 * Description: Convenience function for connecting ethernet
775 * devices to PHY devices. The default behavior is for
776 * the PHY infrastructure to handle everything, and only notify
777 * the connected driver when the link status changes. If you
778 * don't want, or can't use the provided functionality, you may
779 * choose to call only the subset of functions which provide
780 * the desired functionality.
781 */
782struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
783 void (*handler)(struct net_device *),
784 phy_interface_t interface)
785{
786 struct phy_device *phydev;
787 struct device *d;
788 int rc;
789
790 /* Search the list of PHY devices on the mdio bus for the
791 * PHY with the requested name
792 */
793 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
794 if (!d) {
795 pr_err("PHY %s not found\n", bus_id);
796 return ERR_PTR(-ENODEV);
797 }
798 phydev = to_phy_device(d);
799
800 rc = phy_connect_direct(dev, phydev, handler, interface);
801 put_device(d);
802 if (rc)
803 return ERR_PTR(rc);
804
805 return phydev;
806}
807EXPORT_SYMBOL(phy_connect);
808
809/**
810 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
811 * device
812 * @phydev: target phy_device struct
813 */
814void phy_disconnect(struct phy_device *phydev)
815{
816 if (phydev->irq > 0)
817 phy_stop_interrupts(phydev);
818
819 phy_stop_machine(phydev);
820
821 phydev->adjust_link = NULL;
822
823 phy_detach(phydev);
824}
825EXPORT_SYMBOL(phy_disconnect);
826
827/**
828 * phy_poll_reset - Safely wait until a PHY reset has properly completed
829 * @phydev: The PHY device to poll
830 *
831 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
832 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
833 * register must be polled until the BMCR_RESET bit clears.
834 *
835 * Furthermore, any attempts to write to PHY registers may have no effect
836 * or even generate MDIO bus errors until this is complete.
837 *
838 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
839 * standard and do not fully reset after the BMCR_RESET bit is set, and may
840 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
841 * effort to support such broken PHYs, this function is separate from the
842 * standard phy_init_hw() which will zero all the other bits in the BMCR
843 * and reapply all driver-specific and board-specific fixups.
844 */
845static int phy_poll_reset(struct phy_device *phydev)
846{
847 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
848 unsigned int retries = 12;
849 int ret;
850
851 do {
852 msleep(50);
853 ret = phy_read(phydev, MII_BMCR);
854 if (ret < 0)
855 return ret;
856 } while (ret & BMCR_RESET && --retries);
857 if (ret & BMCR_RESET)
858 return -ETIMEDOUT;
859
860 /* Some chips (smsc911x) may still need up to another 1ms after the
861 * BMCR_RESET bit is cleared before they are usable.
862 */
863 msleep(1);
864 return 0;
865}
866
867int phy_init_hw(struct phy_device *phydev)
868{
869 int ret = 0;
870
871 /* Deassert the reset signal */
872 phy_device_reset(phydev, 0);
873
874 if (!phydev->drv || !phydev->drv->config_init)
875 return 0;
876
877 if (phydev->drv->soft_reset)
878 ret = phydev->drv->soft_reset(phydev);
879 else
880 ret = genphy_soft_reset(phydev);
881
882 if (ret < 0)
883 return ret;
884
885 ret = phy_scan_fixups(phydev);
886 if (ret < 0)
887 return ret;
888
889 return phydev->drv->config_init(phydev);
890}
891EXPORT_SYMBOL(phy_init_hw);
892
893void phy_attached_info(struct phy_device *phydev)
894{
895 phy_attached_print(phydev, NULL);
896}
897EXPORT_SYMBOL(phy_attached_info);
898
899#define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
900void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
901{
902 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
903 char *irq_str;
904 char irq_num[8];
905
906 switch(phydev->irq) {
907 case PHY_POLL:
908 irq_str = "POLL";
909 break;
910 case PHY_IGNORE_INTERRUPT:
911 irq_str = "IGNORE";
912 break;
913 default:
914 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
915 irq_str = irq_num;
916 break;
917 }
918
919
920 if (!fmt) {
921 dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n",
922 drv_name, phydev_name(phydev),
923 irq_str);
924 } else {
925 va_list ap;
926
927 dev_info(&phydev->mdio.dev, ATTACHED_FMT,
928 drv_name, phydev_name(phydev),
929 irq_str);
930
931 va_start(ap, fmt);
932 vprintk(fmt, ap);
933 va_end(ap);
934 }
935}
936EXPORT_SYMBOL(phy_attached_print);
937
938/**
939 * phy_attach_direct - attach a network device to a given PHY device pointer
940 * @dev: network device to attach
941 * @phydev: Pointer to phy_device to attach
942 * @flags: PHY device's dev_flags
943 * @interface: PHY device's interface
944 *
945 * Description: Called by drivers to attach to a particular PHY
946 * device. The phy_device is found, and properly hooked up
947 * to the phy_driver. If no driver is attached, then a
948 * generic driver is used. The phy_device is given a ptr to
949 * the attaching device, and given a callback for link status
950 * change. The phy_device is returned to the attaching driver.
951 * This function takes a reference on the phy device.
952 */
953int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
954 u32 flags, phy_interface_t interface)
955{
956 struct module *ndev_owner = dev->dev.parent->driver->owner;
957 struct mii_bus *bus = phydev->mdio.bus;
958 struct device *d = &phydev->mdio.dev;
959 bool using_genphy = false;
960 int err;
961
962 /* For Ethernet device drivers that register their own MDIO bus, we
963 * will have bus->owner match ndev_mod, so we do not want to increment
964 * our own module->refcnt here, otherwise we would not be able to
965 * unload later on.
966 */
967 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
968 dev_err(&dev->dev, "failed to get the bus module\n");
969 return -EIO;
970 }
971
972 get_device(d);
973
974 /* Assume that if there is no driver, that it doesn't
975 * exist, and we should use the genphy driver.
976 */
977 if (!d->driver) {
978 if (phydev->is_c45)
979 d->driver = &genphy_10g_driver.mdiodrv.driver;
980 else
981 d->driver = &genphy_driver.mdiodrv.driver;
982
983 using_genphy = true;
984 }
985
986 if (!try_module_get(d->driver->owner)) {
987 dev_err(&dev->dev, "failed to get the device driver module\n");
988 err = -EIO;
989 goto error_put_device;
990 }
991
992 if (using_genphy) {
993 err = d->driver->probe(d);
994 if (err >= 0)
995 err = device_bind_driver(d);
996
997 if (err)
998 goto error_module_put;
999 }
1000
1001 if (phydev->attached_dev) {
1002 dev_err(&dev->dev, "PHY already attached\n");
1003 err = -EBUSY;
1004 goto error;
1005 }
1006
1007 phydev->phy_link_change = phy_link_change;
1008 phydev->attached_dev = dev;
1009 dev->phydev = phydev;
1010
1011 /* Some Ethernet drivers try to connect to a PHY device before
1012 * calling register_netdevice() -> netdev_register_kobject() and
1013 * does the dev->dev.kobj initialization. Here we only check for
1014 * success which indicates that the network device kobject is
1015 * ready. Once we do that we still need to keep track of whether
1016 * links were successfully set up or not for phy_detach() to
1017 * remove them accordingly.
1018 */
1019 phydev->sysfs_links = false;
1020
1021 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1022 "attached_dev");
1023 if (!err) {
1024 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1025 &phydev->mdio.dev.kobj,
1026 "phydev");
1027 if (err) {
1028 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1029 kobject_name(&phydev->mdio.dev.kobj),
1030 err);
1031 /* non-fatal - some net drivers can use one netdevice
1032 * with more then one phy
1033 */
1034 }
1035
1036 phydev->sysfs_links = true;
1037 }
1038
1039 phydev->dev_flags = flags;
1040
1041 phydev->interface = interface;
1042
1043 phydev->state = PHY_READY;
1044
1045 /* Initial carrier state is off as the phy is about to be
1046 * (re)initialized.
1047 */
1048 netif_carrier_off(phydev->attached_dev);
1049
1050 /* Do initial configuration here, now that
1051 * we have certain key parameters
1052 * (dev_flags and interface)
1053 */
1054 err = phy_init_hw(phydev);
1055 if (err)
1056 goto error;
1057
1058 phy_resume(phydev);
1059 phy_led_triggers_register(phydev);
1060
1061 return err;
1062
1063error:
1064 /* phy_detach() does all of the cleanup below */
1065 phy_detach(phydev);
1066 return err;
1067
1068error_module_put:
1069 module_put(d->driver->owner);
1070error_put_device:
1071 put_device(d);
1072 if (ndev_owner != bus->owner)
1073 module_put(bus->owner);
1074 return err;
1075}
1076EXPORT_SYMBOL(phy_attach_direct);
1077
1078/**
1079 * phy_attach - attach a network device to a particular PHY device
1080 * @dev: network device to attach
1081 * @bus_id: Bus ID of PHY device to attach
1082 * @interface: PHY device's interface
1083 *
1084 * Description: Same as phy_attach_direct() except that a PHY bus_id
1085 * string is passed instead of a pointer to a struct phy_device.
1086 */
1087struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1088 phy_interface_t interface)
1089{
1090 struct bus_type *bus = &mdio_bus_type;
1091 struct phy_device *phydev;
1092 struct device *d;
1093 int rc;
1094
1095 /* Search the list of PHY devices on the mdio bus for the
1096 * PHY with the requested name
1097 */
1098 d = bus_find_device_by_name(bus, NULL, bus_id);
1099 if (!d) {
1100 pr_err("PHY %s not found\n", bus_id);
1101 return ERR_PTR(-ENODEV);
1102 }
1103 phydev = to_phy_device(d);
1104
1105 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1106 put_device(d);
1107 if (rc)
1108 return ERR_PTR(rc);
1109
1110 return phydev;
1111}
1112EXPORT_SYMBOL(phy_attach);
1113
1114/**
1115 * phy_detach - detach a PHY device from its network device
1116 * @phydev: target phy_device struct
1117 *
1118 * This detaches the phy device from its network device and the phy
1119 * driver, and drops the reference count taken in phy_attach_direct().
1120 */
1121void phy_detach(struct phy_device *phydev)
1122{
1123 struct net_device *dev = phydev->attached_dev;
1124 struct module *ndev_owner = dev->dev.parent->driver->owner;
1125 struct mii_bus *bus;
1126
1127 if (phydev->sysfs_links) {
1128 sysfs_remove_link(&dev->dev.kobj, "phydev");
1129 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1130 }
1131 phydev->attached_dev->phydev = NULL;
1132 phydev->attached_dev = NULL;
1133 phy_suspend(phydev);
1134 phydev->phylink = NULL;
1135
1136 phy_led_triggers_unregister(phydev);
1137
1138 module_put(phydev->mdio.dev.driver->owner);
1139
1140 /* If the device had no specific driver before (i.e. - it
1141 * was using the generic driver), we unbind the device
1142 * from the generic driver so that there's a chance a
1143 * real driver could be loaded
1144 */
1145 if (phydev->mdio.dev.driver == &genphy_10g_driver.mdiodrv.driver ||
1146 phydev->mdio.dev.driver == &genphy_driver.mdiodrv.driver)
1147 device_release_driver(&phydev->mdio.dev);
1148
1149 /*
1150 * The phydev might go away on the put_device() below, so avoid
1151 * a use-after-free bug by reading the underlying bus first.
1152 */
1153 bus = phydev->mdio.bus;
1154
1155 put_device(&phydev->mdio.dev);
1156 if (ndev_owner != bus->owner)
1157 module_put(bus->owner);
1158
1159 /* Assert the reset signal */
1160 phy_device_reset(phydev, 1);
1161}
1162EXPORT_SYMBOL(phy_detach);
1163
1164int phy_suspend(struct phy_device *phydev)
1165{
1166 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1167 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1168 int ret = 0;
1169
1170 /* If the device has WOL enabled, we cannot suspend the PHY */
1171 phy_ethtool_get_wol(phydev, &wol);
1172 if (wol.wolopts)
1173 return -EBUSY;
1174
1175 if (phydev->drv && phydrv->suspend)
1176 ret = phydrv->suspend(phydev);
1177
1178 if (ret)
1179 return ret;
1180
1181 phydev->suspended = true;
1182
1183 return ret;
1184}
1185EXPORT_SYMBOL(phy_suspend);
1186
1187int __phy_resume(struct phy_device *phydev)
1188{
1189 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1190 int ret = 0;
1191
1192 WARN_ON(!mutex_is_locked(&phydev->lock));
1193
1194 if (phydev->drv && phydrv->resume)
1195 ret = phydrv->resume(phydev);
1196
1197 if (ret)
1198 return ret;
1199
1200 phydev->suspended = false;
1201
1202 return ret;
1203}
1204EXPORT_SYMBOL(__phy_resume);
1205
1206int phy_resume(struct phy_device *phydev)
1207{
1208 int ret;
1209
1210 mutex_lock(&phydev->lock);
1211 ret = __phy_resume(phydev);
1212 mutex_unlock(&phydev->lock);
1213
1214 return ret;
1215}
1216EXPORT_SYMBOL(phy_resume);
1217
1218int phy_loopback(struct phy_device *phydev, bool enable)
1219{
1220 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1221 int ret = 0;
1222
1223 mutex_lock(&phydev->lock);
1224
1225 if (enable && phydev->loopback_enabled) {
1226 ret = -EBUSY;
1227 goto out;
1228 }
1229
1230 if (!enable && !phydev->loopback_enabled) {
1231 ret = -EINVAL;
1232 goto out;
1233 }
1234
1235 if (phydev->drv && phydrv->set_loopback)
1236 ret = phydrv->set_loopback(phydev, enable);
1237 else
1238 ret = -EOPNOTSUPP;
1239
1240 if (ret)
1241 goto out;
1242
1243 phydev->loopback_enabled = enable;
1244
1245out:
1246 mutex_unlock(&phydev->lock);
1247 return ret;
1248}
1249EXPORT_SYMBOL(phy_loopback);
1250
1251/**
1252 * phy_reset_after_clk_enable - perform a PHY reset if needed
1253 * @phydev: target phy_device struct
1254 *
1255 * Description: Some PHYs are known to need a reset after their refclk was
1256 * enabled. This function evaluates the flags and perform the reset if it's
1257 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1258 * was reset.
1259 */
1260int phy_reset_after_clk_enable(struct phy_device *phydev)
1261{
1262 if (!phydev || !phydev->drv)
1263 return -ENODEV;
1264
1265 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1266 phy_device_reset(phydev, 1);
1267 phy_device_reset(phydev, 0);
1268 return 1;
1269 }
1270
1271 return 0;
1272}
1273EXPORT_SYMBOL(phy_reset_after_clk_enable);
1274
1275/* Generic PHY support and helper functions */
1276
1277/**
1278 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1279 * @phydev: target phy_device struct
1280 *
1281 * Description: Writes MII_ADVERTISE with the appropriate values,
1282 * after sanitizing the values to make sure we only advertise
1283 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1284 * hasn't changed, and > 0 if it has changed.
1285 */
1286static int genphy_config_advert(struct phy_device *phydev)
1287{
1288 u32 advertise;
1289 int oldadv, adv, bmsr;
1290 int err, changed = 0;
1291
1292 /* Only allow advertising what this PHY supports */
1293 phydev->advertising &= phydev->supported;
1294 advertise = phydev->advertising;
1295
1296 /* Setup standard advertisement */
1297 adv = phy_read(phydev, MII_ADVERTISE);
1298 if (adv < 0)
1299 return adv;
1300
1301 oldadv = adv;
1302 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
1303 ADVERTISE_PAUSE_ASYM);
1304 adv |= ethtool_adv_to_mii_adv_t(advertise);
1305
1306 if (adv != oldadv) {
1307 err = phy_write(phydev, MII_ADVERTISE, adv);
1308
1309 if (err < 0)
1310 return err;
1311 changed = 1;
1312 }
1313
1314 bmsr = phy_read(phydev, MII_BMSR);
1315 if (bmsr < 0)
1316 return bmsr;
1317
1318 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1319 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1320 * logical 1.
1321 */
1322 if (!(bmsr & BMSR_ESTATEN))
1323 return changed;
1324
1325 /* Configure gigabit if it's supported */
1326 adv = phy_read(phydev, MII_CTRL1000);
1327 if (adv < 0)
1328 return adv;
1329
1330 oldadv = adv;
1331 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
1332
1333 if (phydev->supported & (SUPPORTED_1000baseT_Half |
1334 SUPPORTED_1000baseT_Full)) {
1335 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
1336 }
1337
1338 if (adv != oldadv)
1339 changed = 1;
1340
1341 err = phy_write(phydev, MII_CTRL1000, adv);
1342 if (err < 0)
1343 return err;
1344
1345 return changed;
1346}
1347
1348/**
1349 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1350 * @phydev: target phy_device struct
1351 *
1352 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1353 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1354 * changed, and 1 if it has changed.
1355 */
1356static int genphy_config_eee_advert(struct phy_device *phydev)
1357{
1358 int broken = phydev->eee_broken_modes;
1359 int old_adv, adv;
1360
1361 /* Nothing to disable */
1362 if (!broken)
1363 return 0;
1364
1365 /* If the following call fails, we assume that EEE is not
1366 * supported by the phy. If we read 0, EEE is not advertised
1367 * In both case, we don't need to continue
1368 */
1369 adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1370 if (adv <= 0)
1371 return 0;
1372
1373 old_adv = adv;
1374 adv &= ~broken;
1375
1376 /* Advertising remains unchanged with the broken mask */
1377 if (old_adv == adv)
1378 return 0;
1379
1380 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1381
1382 return 1;
1383}
1384
1385/**
1386 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1387 * @phydev: target phy_device struct
1388 *
1389 * Description: Configures MII_BMCR to force speed/duplex
1390 * to the values in phydev. Assumes that the values are valid.
1391 * Please see phy_sanitize_settings().
1392 */
1393int genphy_setup_forced(struct phy_device *phydev)
1394{
1395 u16 ctl = 0;
1396
1397 phydev->pause = 0;
1398 phydev->asym_pause = 0;
1399
1400 if (SPEED_1000 == phydev->speed)
1401 ctl |= BMCR_SPEED1000;
1402 else if (SPEED_100 == phydev->speed)
1403 ctl |= BMCR_SPEED100;
1404
1405 if (DUPLEX_FULL == phydev->duplex)
1406 ctl |= BMCR_FULLDPLX;
1407
1408 return phy_modify(phydev, MII_BMCR,
1409 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
1410}
1411EXPORT_SYMBOL(genphy_setup_forced);
1412
1413/**
1414 * genphy_restart_aneg - Enable and Restart Autonegotiation
1415 * @phydev: target phy_device struct
1416 */
1417int genphy_restart_aneg(struct phy_device *phydev)
1418{
1419 /* Don't isolate the PHY if we're negotiating */
1420 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
1421 BMCR_ANENABLE | BMCR_ANRESTART);
1422}
1423EXPORT_SYMBOL(genphy_restart_aneg);
1424
1425/**
1426 * genphy_config_aneg - restart auto-negotiation or write BMCR
1427 * @phydev: target phy_device struct
1428 *
1429 * Description: If auto-negotiation is enabled, we configure the
1430 * advertising, and then restart auto-negotiation. If it is not
1431 * enabled, then we write the BMCR.
1432 */
1433int genphy_config_aneg(struct phy_device *phydev)
1434{
1435 int err, changed;
1436
1437 changed = genphy_config_eee_advert(phydev);
1438
1439 if (AUTONEG_ENABLE != phydev->autoneg)
1440 return genphy_setup_forced(phydev);
1441
1442 err = genphy_config_advert(phydev);
1443 if (err < 0) /* error */
1444 return err;
1445
1446 changed |= err;
1447
1448 if (changed == 0) {
1449 /* Advertisement hasn't changed, but maybe aneg was never on to
1450 * begin with? Or maybe phy was isolated?
1451 */
1452 int ctl = phy_read(phydev, MII_BMCR);
1453
1454 if (ctl < 0)
1455 return ctl;
1456
1457 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1458 changed = 1; /* do restart aneg */
1459 }
1460
1461 /* Only restart aneg if we are advertising something different
1462 * than we were before.
1463 */
1464 if (changed > 0)
1465 return genphy_restart_aneg(phydev);
1466
1467 return 0;
1468}
1469EXPORT_SYMBOL(genphy_config_aneg);
1470
1471/**
1472 * genphy_aneg_done - return auto-negotiation status
1473 * @phydev: target phy_device struct
1474 *
1475 * Description: Reads the status register and returns 0 either if
1476 * auto-negotiation is incomplete, or if there was an error.
1477 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1478 */
1479int genphy_aneg_done(struct phy_device *phydev)
1480{
1481 int retval = phy_read(phydev, MII_BMSR);
1482
1483 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1484}
1485EXPORT_SYMBOL(genphy_aneg_done);
1486
1487/**
1488 * genphy_update_link - update link status in @phydev
1489 * @phydev: target phy_device struct
1490 *
1491 * Description: Update the value in phydev->link to reflect the
1492 * current link value. In order to do this, we need to read
1493 * the status register twice, keeping the second value.
1494 */
1495int genphy_update_link(struct phy_device *phydev)
1496{
1497 int status;
1498
1499 /* Do a fake read */
1500 status = phy_read(phydev, MII_BMSR);
1501 if (status < 0)
1502 return status;
1503
1504 /* Read link and autonegotiation status */
1505 status = phy_read(phydev, MII_BMSR);
1506 if (status < 0)
1507 return status;
1508
1509 if ((status & BMSR_LSTATUS) == 0)
1510 phydev->link = 0;
1511 else
1512 phydev->link = 1;
1513
1514 return 0;
1515}
1516EXPORT_SYMBOL(genphy_update_link);
1517
1518/**
1519 * genphy_read_status - check the link status and update current link state
1520 * @phydev: target phy_device struct
1521 *
1522 * Description: Check the link, then figure out the current state
1523 * by comparing what we advertise with what the link partner
1524 * advertises. Start by checking the gigabit possibilities,
1525 * then move on to 10/100.
1526 */
1527int genphy_read_status(struct phy_device *phydev)
1528{
1529 int adv;
1530 int err;
1531 int lpa;
1532 int lpagb = 0;
1533 int common_adv;
1534 int common_adv_gb = 0;
1535
1536 /* Update the link, but return if there was an error */
1537 err = genphy_update_link(phydev);
1538 if (err)
1539 return err;
1540
1541 phydev->lp_advertising = 0;
1542
1543 if (AUTONEG_ENABLE == phydev->autoneg) {
1544 if (phydev->supported & (SUPPORTED_1000baseT_Half
1545 | SUPPORTED_1000baseT_Full)) {
1546 lpagb = phy_read(phydev, MII_STAT1000);
1547 if (lpagb < 0)
1548 return lpagb;
1549
1550 adv = phy_read(phydev, MII_CTRL1000);
1551 if (adv < 0)
1552 return adv;
1553
1554 phydev->lp_advertising =
1555 mii_stat1000_to_ethtool_lpa_t(lpagb);
1556 common_adv_gb = lpagb & adv << 2;
1557 }
1558
1559 lpa = phy_read(phydev, MII_LPA);
1560 if (lpa < 0)
1561 return lpa;
1562
1563 phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
1564
1565 adv = phy_read(phydev, MII_ADVERTISE);
1566 if (adv < 0)
1567 return adv;
1568
1569 common_adv = lpa & adv;
1570
1571 phydev->speed = SPEED_10;
1572 phydev->duplex = DUPLEX_HALF;
1573 phydev->pause = 0;
1574 phydev->asym_pause = 0;
1575
1576 if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) {
1577 phydev->speed = SPEED_1000;
1578
1579 if (common_adv_gb & LPA_1000FULL)
1580 phydev->duplex = DUPLEX_FULL;
1581 } else if (common_adv & (LPA_100FULL | LPA_100HALF)) {
1582 phydev->speed = SPEED_100;
1583
1584 if (common_adv & LPA_100FULL)
1585 phydev->duplex = DUPLEX_FULL;
1586 } else
1587 if (common_adv & LPA_10FULL)
1588 phydev->duplex = DUPLEX_FULL;
1589
1590 if (phydev->duplex == DUPLEX_FULL) {
1591 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
1592 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
1593 }
1594 } else {
1595 int bmcr = phy_read(phydev, MII_BMCR);
1596
1597 if (bmcr < 0)
1598 return bmcr;
1599
1600 if (bmcr & BMCR_FULLDPLX)
1601 phydev->duplex = DUPLEX_FULL;
1602 else
1603 phydev->duplex = DUPLEX_HALF;
1604
1605 if (bmcr & BMCR_SPEED1000)
1606 phydev->speed = SPEED_1000;
1607 else if (bmcr & BMCR_SPEED100)
1608 phydev->speed = SPEED_100;
1609 else
1610 phydev->speed = SPEED_10;
1611
1612 phydev->pause = 0;
1613 phydev->asym_pause = 0;
1614 }
1615
1616 return 0;
1617}
1618EXPORT_SYMBOL(genphy_read_status);
1619
1620/**
1621 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1622 * @phydev: target phy_device struct
1623 *
1624 * Description: Perform a software PHY reset using the standard
1625 * BMCR_RESET bit and poll for the reset bit to be cleared.
1626 *
1627 * Returns: 0 on success, < 0 on failure
1628 */
1629int genphy_soft_reset(struct phy_device *phydev)
1630{
1631 int ret;
1632
1633 ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
1634 if (ret < 0)
1635 return ret;
1636
1637 return phy_poll_reset(phydev);
1638}
1639EXPORT_SYMBOL(genphy_soft_reset);
1640
1641int genphy_config_init(struct phy_device *phydev)
1642{
1643 int val;
1644 u32 features;
1645
1646 features = (SUPPORTED_TP | SUPPORTED_MII
1647 | SUPPORTED_AUI | SUPPORTED_FIBRE |
1648 SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1649
1650 /* Do we support autonegotiation? */
1651 val = phy_read(phydev, MII_BMSR);
1652 if (val < 0)
1653 return val;
1654
1655 if (val & BMSR_ANEGCAPABLE)
1656 features |= SUPPORTED_Autoneg;
1657
1658 if (val & BMSR_100FULL)
1659 features |= SUPPORTED_100baseT_Full;
1660 if (val & BMSR_100HALF)
1661 features |= SUPPORTED_100baseT_Half;
1662 if (val & BMSR_10FULL)
1663 features |= SUPPORTED_10baseT_Full;
1664 if (val & BMSR_10HALF)
1665 features |= SUPPORTED_10baseT_Half;
1666
1667 if (val & BMSR_ESTATEN) {
1668 val = phy_read(phydev, MII_ESTATUS);
1669 if (val < 0)
1670 return val;
1671
1672 if (val & ESTATUS_1000_TFULL)
1673 features |= SUPPORTED_1000baseT_Full;
1674 if (val & ESTATUS_1000_THALF)
1675 features |= SUPPORTED_1000baseT_Half;
1676 }
1677
1678 phydev->supported &= features;
1679 phydev->advertising &= features;
1680
1681 return 0;
1682}
1683EXPORT_SYMBOL(genphy_config_init);
1684
1685/* This is used for the phy device which doesn't support the MMD extended
1686 * register access, but it does have side effect when we are trying to access
1687 * the MMD register via indirect method.
1688 */
1689int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
1690{
1691 return -EOPNOTSUPP;
1692}
1693EXPORT_SYMBOL(genphy_read_mmd_unsupported);
1694
1695int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
1696 u16 regnum, u16 val)
1697{
1698 return -EOPNOTSUPP;
1699}
1700EXPORT_SYMBOL(genphy_write_mmd_unsupported);
1701
1702int genphy_suspend(struct phy_device *phydev)
1703{
1704 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
1705}
1706EXPORT_SYMBOL(genphy_suspend);
1707
1708int genphy_resume(struct phy_device *phydev)
1709{
1710 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
1711}
1712EXPORT_SYMBOL(genphy_resume);
1713
1714int genphy_loopback(struct phy_device *phydev, bool enable)
1715{
1716 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
1717 enable ? BMCR_LOOPBACK : 0);
1718}
1719EXPORT_SYMBOL(genphy_loopback);
1720
1721static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
1722{
1723 /* The default values for phydev->supported are provided by the PHY
1724 * driver "features" member, we want to reset to sane defaults first
1725 * before supporting higher speeds.
1726 */
1727 phydev->supported &= PHY_DEFAULT_FEATURES;
1728
1729 switch (max_speed) {
1730 default:
1731 return -ENOTSUPP;
1732 case SPEED_1000:
1733 phydev->supported |= PHY_1000BT_FEATURES;
1734 /* fall through */
1735 case SPEED_100:
1736 phydev->supported |= PHY_100BT_FEATURES;
1737 /* fall through */
1738 case SPEED_10:
1739 phydev->supported |= PHY_10BT_FEATURES;
1740 }
1741
1742 return 0;
1743}
1744
1745int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
1746{
1747 int err;
1748
1749 err = __set_phy_supported(phydev, max_speed);
1750 if (err)
1751 return err;
1752
1753 phydev->advertising = phydev->supported;
1754
1755 return 0;
1756}
1757EXPORT_SYMBOL(phy_set_max_speed);
1758
1759static void of_set_phy_supported(struct phy_device *phydev)
1760{
1761 struct device_node *node = phydev->mdio.dev.of_node;
1762 u32 max_speed;
1763
1764 if (!IS_ENABLED(CONFIG_OF_MDIO))
1765 return;
1766
1767 if (!node)
1768 return;
1769
1770 if (!of_property_read_u32(node, "max-speed", &max_speed))
1771 __set_phy_supported(phydev, max_speed);
1772}
1773
1774static void of_set_phy_eee_broken(struct phy_device *phydev)
1775{
1776 struct device_node *node = phydev->mdio.dev.of_node;
1777 u32 broken = 0;
1778
1779 if (!IS_ENABLED(CONFIG_OF_MDIO))
1780 return;
1781
1782 if (!node)
1783 return;
1784
1785 if (of_property_read_bool(node, "eee-broken-100tx"))
1786 broken |= MDIO_EEE_100TX;
1787 if (of_property_read_bool(node, "eee-broken-1000t"))
1788 broken |= MDIO_EEE_1000T;
1789 if (of_property_read_bool(node, "eee-broken-10gt"))
1790 broken |= MDIO_EEE_10GT;
1791 if (of_property_read_bool(node, "eee-broken-1000kx"))
1792 broken |= MDIO_EEE_1000KX;
1793 if (of_property_read_bool(node, "eee-broken-10gkx4"))
1794 broken |= MDIO_EEE_10GKX4;
1795 if (of_property_read_bool(node, "eee-broken-10gkr"))
1796 broken |= MDIO_EEE_10GKR;
1797
1798 phydev->eee_broken_modes = broken;
1799}
1800
1801/**
1802 * phy_probe - probe and init a PHY device
1803 * @dev: device to probe and init
1804 *
1805 * Description: Take care of setting up the phy_device structure,
1806 * set the state to READY (the driver's init function should
1807 * set it to STARTING if needed).
1808 */
1809static int phy_probe(struct device *dev)
1810{
1811 struct phy_device *phydev = to_phy_device(dev);
1812 struct device_driver *drv = phydev->mdio.dev.driver;
1813 struct phy_driver *phydrv = to_phy_driver(drv);
1814 int err = 0;
1815
1816 phydev->drv = phydrv;
1817
1818 /* Disable the interrupt if the PHY doesn't support it
1819 * but the interrupt is still a valid one
1820 */
1821 if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
1822 phy_interrupt_is_valid(phydev))
1823 phydev->irq = PHY_POLL;
1824
1825 if (phydrv->flags & PHY_IS_INTERNAL)
1826 phydev->is_internal = true;
1827
1828 mutex_lock(&phydev->lock);
1829
1830 /* Start out supporting everything. Eventually,
1831 * a controller will attach, and may modify one
1832 * or both of these values
1833 */
1834 phydev->supported = phydrv->features;
1835 of_set_phy_supported(phydev);
1836 phydev->advertising = phydev->supported;
1837
1838 /* Get the EEE modes we want to prohibit. We will ask
1839 * the PHY stop advertising these mode later on
1840 */
1841 of_set_phy_eee_broken(phydev);
1842
1843 /* The Pause Frame bits indicate that the PHY can support passing
1844 * pause frames. During autonegotiation, the PHYs will determine if
1845 * they should allow pause frames to pass. The MAC driver should then
1846 * use that result to determine whether to enable flow control via
1847 * pause frames.
1848 *
1849 * Normally, PHY drivers should not set the Pause bits, and instead
1850 * allow phylib to do that. However, there may be some situations
1851 * (e.g. hardware erratum) where the driver wants to set only one
1852 * of these bits.
1853 */
1854 if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) {
1855 phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1856 phydev->supported |= phydrv->features &
1857 (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1858 } else {
1859 phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
1860 }
1861
1862 /* Set the state to READY by default */
1863 phydev->state = PHY_READY;
1864
1865 if (phydev->drv->probe) {
1866 /* Deassert the reset signal */
1867 phy_device_reset(phydev, 0);
1868
1869 err = phydev->drv->probe(phydev);
1870 if (err) {
1871 /* Assert the reset signal */
1872 phy_device_reset(phydev, 1);
1873 }
1874 }
1875
1876 mutex_unlock(&phydev->lock);
1877
1878 return err;
1879}
1880
1881static int phy_remove(struct device *dev)
1882{
1883 struct phy_device *phydev = to_phy_device(dev);
1884
1885 cancel_delayed_work_sync(&phydev->state_queue);
1886
1887 mutex_lock(&phydev->lock);
1888 phydev->state = PHY_DOWN;
1889 mutex_unlock(&phydev->lock);
1890
1891 if (phydev->drv && phydev->drv->remove) {
1892 phydev->drv->remove(phydev);
1893
1894 /* Assert the reset signal */
1895 phy_device_reset(phydev, 1);
1896 }
1897 phydev->drv = NULL;
1898
1899 return 0;
1900}
1901
1902/**
1903 * phy_driver_register - register a phy_driver with the PHY layer
1904 * @new_driver: new phy_driver to register
1905 * @owner: module owning this PHY
1906 */
1907int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
1908{
1909 int retval;
1910
1911 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
1912 new_driver->mdiodrv.driver.name = new_driver->name;
1913 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
1914 new_driver->mdiodrv.driver.probe = phy_probe;
1915 new_driver->mdiodrv.driver.remove = phy_remove;
1916 new_driver->mdiodrv.driver.owner = owner;
1917
1918 retval = driver_register(&new_driver->mdiodrv.driver);
1919 if (retval) {
1920 pr_err("%s: Error %d in registering driver\n",
1921 new_driver->name, retval);
1922
1923 return retval;
1924 }
1925
1926 pr_debug("%s: Registered new driver\n", new_driver->name);
1927
1928 return 0;
1929}
1930EXPORT_SYMBOL(phy_driver_register);
1931
1932int phy_drivers_register(struct phy_driver *new_driver, int n,
1933 struct module *owner)
1934{
1935 int i, ret = 0;
1936
1937 for (i = 0; i < n; i++) {
1938 ret = phy_driver_register(new_driver + i, owner);
1939 if (ret) {
1940 while (i-- > 0)
1941 phy_driver_unregister(new_driver + i);
1942 break;
1943 }
1944 }
1945 return ret;
1946}
1947EXPORT_SYMBOL(phy_drivers_register);
1948
1949void phy_driver_unregister(struct phy_driver *drv)
1950{
1951 driver_unregister(&drv->mdiodrv.driver);
1952}
1953EXPORT_SYMBOL(phy_driver_unregister);
1954
1955void phy_drivers_unregister(struct phy_driver *drv, int n)
1956{
1957 int i;
1958
1959 for (i = 0; i < n; i++)
1960 phy_driver_unregister(drv + i);
1961}
1962EXPORT_SYMBOL(phy_drivers_unregister);
1963
1964static struct phy_driver genphy_driver = {
1965 .phy_id = 0xffffffff,
1966 .phy_id_mask = 0xffffffff,
1967 .name = "Generic PHY",
1968 .soft_reset = genphy_no_soft_reset,
1969 .config_init = genphy_config_init,
1970 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
1971 SUPPORTED_AUI | SUPPORTED_FIBRE |
1972 SUPPORTED_BNC,
1973 .aneg_done = genphy_aneg_done,
1974 .suspend = genphy_suspend,
1975 .resume = genphy_resume,
1976 .set_loopback = genphy_loopback,
1977};
1978
1979static int __init phy_init(void)
1980{
1981 int rc;
1982
1983 rc = mdio_bus_init();
1984 if (rc)
1985 return rc;
1986
1987 rc = phy_driver_register(&genphy_10g_driver, THIS_MODULE);
1988 if (rc)
1989 goto err_10g;
1990
1991 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
1992 if (rc) {
1993 phy_driver_unregister(&genphy_10g_driver);
1994err_10g:
1995 mdio_bus_exit();
1996 }
1997
1998 return rc;
1999}
2000
2001static void __exit phy_exit(void)
2002{
2003 phy_driver_unregister(&genphy_10g_driver);
2004 phy_driver_unregister(&genphy_driver);
2005 mdio_bus_exit();
2006}
2007
2008subsys_initcall(phy_init);
2009module_exit(phy_exit);