1 // SPDX-License-Identifier: GPL-2.0+
2 /* Framework for finding and configuring PHYs.
3 * Also contains generic PHY driver
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
21 #include <linux/kernel.h>
22 #include <linux/mdio.h>
23 #include <linux/mii.h>
25 #include <linux/module.h>
26 #include <linux/netdevice.h>
27 #include <linux/phy.h>
28 #include <linux/phy_led_triggers.h>
29 #include <linux/pse-pd/pse.h>
30 #include <linux/property.h>
31 #include <linux/sfp.h>
32 #include <linux/skbuff.h>
33 #include <linux/slab.h>
34 #include <linux/string.h>
35 #include <linux/uaccess.h>
36 #include <linux/unistd.h>
38 MODULE_DESCRIPTION("PHY library");
39 MODULE_AUTHOR("Andy Fleming");
40 MODULE_LICENSE("GPL");
42 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
43 EXPORT_SYMBOL_GPL(phy_basic_features);
45 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
46 EXPORT_SYMBOL_GPL(phy_basic_t1_features);
48 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
49 EXPORT_SYMBOL_GPL(phy_gbit_features);
51 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
52 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
54 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
55 EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
57 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
58 EXPORT_SYMBOL_GPL(phy_10gbit_features);
60 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
61 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
63 const int phy_basic_ports_array[3] = {
64 ETHTOOL_LINK_MODE_Autoneg_BIT,
65 ETHTOOL_LINK_MODE_TP_BIT,
66 ETHTOOL_LINK_MODE_MII_BIT,
68 EXPORT_SYMBOL_GPL(phy_basic_ports_array);
70 const int phy_fibre_port_array[1] = {
71 ETHTOOL_LINK_MODE_FIBRE_BIT,
73 EXPORT_SYMBOL_GPL(phy_fibre_port_array);
75 const int phy_all_ports_features_array[7] = {
76 ETHTOOL_LINK_MODE_Autoneg_BIT,
77 ETHTOOL_LINK_MODE_TP_BIT,
78 ETHTOOL_LINK_MODE_MII_BIT,
79 ETHTOOL_LINK_MODE_FIBRE_BIT,
80 ETHTOOL_LINK_MODE_AUI_BIT,
81 ETHTOOL_LINK_MODE_BNC_BIT,
82 ETHTOOL_LINK_MODE_Backplane_BIT,
84 EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
86 const int phy_10_100_features_array[4] = {
87 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
88 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
89 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
90 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
92 EXPORT_SYMBOL_GPL(phy_10_100_features_array);
94 const int phy_basic_t1_features_array[3] = {
95 ETHTOOL_LINK_MODE_TP_BIT,
96 ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
97 ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
99 EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
101 const int phy_gbit_features_array[2] = {
102 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
103 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
105 EXPORT_SYMBOL_GPL(phy_gbit_features_array);
107 const int phy_10gbit_features_array[1] = {
108 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
110 EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
112 static const int phy_10gbit_fec_features_array[1] = {
113 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
116 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
117 EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
119 static const int phy_10gbit_full_features_array[] = {
120 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
121 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
122 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
123 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
126 static void features_init(void)
128 /* 10/100 half/full*/
129 linkmode_set_bit_array(phy_basic_ports_array,
130 ARRAY_SIZE(phy_basic_ports_array),
132 linkmode_set_bit_array(phy_10_100_features_array,
133 ARRAY_SIZE(phy_10_100_features_array),
137 linkmode_set_bit_array(phy_basic_t1_features_array,
138 ARRAY_SIZE(phy_basic_t1_features_array),
139 phy_basic_t1_features);
141 /* 10/100 half/full + 1000 half/full */
142 linkmode_set_bit_array(phy_basic_ports_array,
143 ARRAY_SIZE(phy_basic_ports_array),
145 linkmode_set_bit_array(phy_10_100_features_array,
146 ARRAY_SIZE(phy_10_100_features_array),
148 linkmode_set_bit_array(phy_gbit_features_array,
149 ARRAY_SIZE(phy_gbit_features_array),
152 /* 10/100 half/full + 1000 half/full + fibre*/
153 linkmode_set_bit_array(phy_basic_ports_array,
154 ARRAY_SIZE(phy_basic_ports_array),
155 phy_gbit_fibre_features);
156 linkmode_set_bit_array(phy_10_100_features_array,
157 ARRAY_SIZE(phy_10_100_features_array),
158 phy_gbit_fibre_features);
159 linkmode_set_bit_array(phy_gbit_features_array,
160 ARRAY_SIZE(phy_gbit_features_array),
161 phy_gbit_fibre_features);
162 linkmode_set_bit_array(phy_fibre_port_array,
163 ARRAY_SIZE(phy_fibre_port_array),
164 phy_gbit_fibre_features);
166 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
167 linkmode_set_bit_array(phy_all_ports_features_array,
168 ARRAY_SIZE(phy_all_ports_features_array),
169 phy_gbit_all_ports_features);
170 linkmode_set_bit_array(phy_10_100_features_array,
171 ARRAY_SIZE(phy_10_100_features_array),
172 phy_gbit_all_ports_features);
173 linkmode_set_bit_array(phy_gbit_features_array,
174 ARRAY_SIZE(phy_gbit_features_array),
175 phy_gbit_all_ports_features);
177 /* 10/100 half/full + 1000 half/full + 10G full*/
178 linkmode_set_bit_array(phy_all_ports_features_array,
179 ARRAY_SIZE(phy_all_ports_features_array),
180 phy_10gbit_features);
181 linkmode_set_bit_array(phy_10_100_features_array,
182 ARRAY_SIZE(phy_10_100_features_array),
183 phy_10gbit_features);
184 linkmode_set_bit_array(phy_gbit_features_array,
185 ARRAY_SIZE(phy_gbit_features_array),
186 phy_10gbit_features);
187 linkmode_set_bit_array(phy_10gbit_features_array,
188 ARRAY_SIZE(phy_10gbit_features_array),
189 phy_10gbit_features);
191 /* 10/100/1000/10G full */
192 linkmode_set_bit_array(phy_all_ports_features_array,
193 ARRAY_SIZE(phy_all_ports_features_array),
194 phy_10gbit_full_features);
195 linkmode_set_bit_array(phy_10gbit_full_features_array,
196 ARRAY_SIZE(phy_10gbit_full_features_array),
197 phy_10gbit_full_features);
199 linkmode_set_bit_array(phy_10gbit_fec_features_array,
200 ARRAY_SIZE(phy_10gbit_fec_features_array),
201 phy_10gbit_fec_features);
204 void phy_device_free(struct phy_device *phydev)
206 put_device(&phydev->mdio.dev);
208 EXPORT_SYMBOL(phy_device_free);
210 static void phy_mdio_device_free(struct mdio_device *mdiodev)
212 struct phy_device *phydev;
214 phydev = container_of(mdiodev, struct phy_device, mdio);
215 phy_device_free(phydev);
218 static void phy_device_release(struct device *dev)
220 fwnode_handle_put(dev->fwnode);
221 kfree(to_phy_device(dev));
224 static void phy_mdio_device_remove(struct mdio_device *mdiodev)
226 struct phy_device *phydev;
228 phydev = container_of(mdiodev, struct phy_device, mdio);
229 phy_device_remove(phydev);
232 static struct phy_driver genphy_driver;
234 static LIST_HEAD(phy_fixup_list);
235 static DEFINE_MUTEX(phy_fixup_lock);
237 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
239 struct device_driver *drv = phydev->mdio.dev.driver;
240 struct phy_driver *phydrv = to_phy_driver(drv);
241 struct net_device *netdev = phydev->attached_dev;
243 if (!drv || !phydrv->suspend)
246 /* PHY not attached? May suspend if the PHY has not already been
247 * suspended as part of a prior call to phy_disconnect() ->
248 * phy_detach() -> phy_suspend() because the parent netdev might be the
249 * MDIO bus driver and clock gated at this point.
254 if (netdev->wol_enabled)
257 /* As long as not all affected network drivers support the
258 * wol_enabled flag, let's check for hints that WoL is enabled.
259 * Don't suspend PHY if the attached netdev parent may wake up.
260 * The parent may point to a PCI device, as in tg3 driver.
262 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
265 /* Also don't suspend PHY if the netdev itself may wakeup. This
266 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
269 if (device_may_wakeup(&netdev->dev))
273 return !phydev->suspended;
276 static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
278 struct phy_device *phydev = to_phy_device(dev);
280 if (phydev->mac_managed_pm)
283 /* Wakeup interrupts may occur during the system sleep transition when
284 * the PHY is inaccessible. Set flag to postpone handling until the PHY
285 * has resumed. Wait for concurrent interrupt handler to complete.
287 if (phy_interrupt_is_valid(phydev)) {
288 phydev->irq_suspended = 1;
289 synchronize_irq(phydev->irq);
292 /* We must stop the state machine manually, otherwise it stops out of
293 * control, possibly with the phydev->lock held. Upon resume, netdev
294 * may call phy routines that try to grab the same lock, and that may
295 * lead to a deadlock.
297 if (phydev->attached_dev && phydev->adjust_link)
298 phy_stop_machine(phydev);
300 if (!mdio_bus_phy_may_suspend(phydev))
303 phydev->suspended_by_mdio_bus = 1;
305 return phy_suspend(phydev);
308 static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
310 struct phy_device *phydev = to_phy_device(dev);
313 if (phydev->mac_managed_pm)
316 if (!phydev->suspended_by_mdio_bus)
319 phydev->suspended_by_mdio_bus = 0;
321 /* If we managed to get here with the PHY state machine in a state
322 * neither PHY_HALTED, PHY_READY nor PHY_UP, this is an indication
323 * that something went wrong and we should most likely be using
324 * MAC managed PM, but we are not.
326 WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY &&
327 phydev->state != PHY_UP);
329 ret = phy_init_hw(phydev);
333 ret = phy_resume(phydev);
337 if (phy_interrupt_is_valid(phydev)) {
338 phydev->irq_suspended = 0;
339 synchronize_irq(phydev->irq);
341 /* Rerun interrupts which were postponed by phy_interrupt()
342 * because they occurred during the system sleep transition.
344 if (phydev->irq_rerun) {
345 phydev->irq_rerun = 0;
346 enable_irq(phydev->irq);
347 irq_wake_thread(phydev->irq, phydev);
351 if (phydev->attached_dev && phydev->adjust_link)
352 phy_start_machine(phydev);
357 static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend,
358 mdio_bus_phy_resume);
361 * phy_register_fixup - creates a new phy_fixup and adds it to the list
362 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
363 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
364 * It can also be PHY_ANY_UID
365 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
367 * @run: The actual code to be run when a matching PHY is found
369 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
370 int (*run)(struct phy_device *))
372 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
377 strscpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
378 fixup->phy_uid = phy_uid;
379 fixup->phy_uid_mask = phy_uid_mask;
382 mutex_lock(&phy_fixup_lock);
383 list_add_tail(&fixup->list, &phy_fixup_list);
384 mutex_unlock(&phy_fixup_lock);
388 EXPORT_SYMBOL(phy_register_fixup);
390 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
391 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
392 int (*run)(struct phy_device *))
394 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
396 EXPORT_SYMBOL(phy_register_fixup_for_uid);
398 /* Registers a fixup to be run on the PHY with id string bus_id */
399 int phy_register_fixup_for_id(const char *bus_id,
400 int (*run)(struct phy_device *))
402 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
404 EXPORT_SYMBOL(phy_register_fixup_for_id);
407 * phy_unregister_fixup - remove a phy_fixup from the list
408 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
409 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
410 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
412 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
414 struct list_head *pos, *n;
415 struct phy_fixup *fixup;
420 mutex_lock(&phy_fixup_lock);
421 list_for_each_safe(pos, n, &phy_fixup_list) {
422 fixup = list_entry(pos, struct phy_fixup, list);
424 if ((!strcmp(fixup->bus_id, bus_id)) &&
425 ((fixup->phy_uid & phy_uid_mask) ==
426 (phy_uid & phy_uid_mask))) {
427 list_del(&fixup->list);
433 mutex_unlock(&phy_fixup_lock);
437 EXPORT_SYMBOL(phy_unregister_fixup);
439 /* Unregisters a fixup of any PHY with the UID in phy_uid */
440 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
442 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
444 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
446 /* Unregisters a fixup of the PHY with id string bus_id */
447 int phy_unregister_fixup_for_id(const char *bus_id)
449 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
451 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
453 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
454 * Fixups can be set to match any in one or more fields.
456 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
458 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
459 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
462 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
463 (phydev->phy_id & fixup->phy_uid_mask))
464 if (fixup->phy_uid != PHY_ANY_UID)
470 /* Runs any matching fixups for this phydev */
471 static int phy_scan_fixups(struct phy_device *phydev)
473 struct phy_fixup *fixup;
475 mutex_lock(&phy_fixup_lock);
476 list_for_each_entry(fixup, &phy_fixup_list, list) {
477 if (phy_needs_fixup(phydev, fixup)) {
478 int err = fixup->run(phydev);
481 mutex_unlock(&phy_fixup_lock);
484 phydev->has_fixups = true;
487 mutex_unlock(&phy_fixup_lock);
492 static int phy_bus_match(struct device *dev, struct device_driver *drv)
494 struct phy_device *phydev = to_phy_device(dev);
495 struct phy_driver *phydrv = to_phy_driver(drv);
496 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
499 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
502 if (phydrv->match_phy_device)
503 return phydrv->match_phy_device(phydev);
505 if (phydev->is_c45) {
506 for (i = 1; i < num_ids; i++) {
507 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
510 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
511 (phydev->c45_ids.device_ids[i] &
512 phydrv->phy_id_mask))
517 return (phydrv->phy_id & phydrv->phy_id_mask) ==
518 (phydev->phy_id & phydrv->phy_id_mask);
523 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
525 struct phy_device *phydev = to_phy_device(dev);
527 return sysfs_emit(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
529 static DEVICE_ATTR_RO(phy_id);
532 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
534 struct phy_device *phydev = to_phy_device(dev);
535 const char *mode = NULL;
537 if (phy_is_internal(phydev))
540 mode = phy_modes(phydev->interface);
542 return sysfs_emit(buf, "%s\n", mode);
544 static DEVICE_ATTR_RO(phy_interface);
547 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
550 struct phy_device *phydev = to_phy_device(dev);
552 return sysfs_emit(buf, "%d\n", phydev->has_fixups);
554 static DEVICE_ATTR_RO(phy_has_fixups);
556 static ssize_t phy_dev_flags_show(struct device *dev,
557 struct device_attribute *attr,
560 struct phy_device *phydev = to_phy_device(dev);
562 return sysfs_emit(buf, "0x%08x\n", phydev->dev_flags);
564 static DEVICE_ATTR_RO(phy_dev_flags);
566 static struct attribute *phy_dev_attrs[] = {
567 &dev_attr_phy_id.attr,
568 &dev_attr_phy_interface.attr,
569 &dev_attr_phy_has_fixups.attr,
570 &dev_attr_phy_dev_flags.attr,
573 ATTRIBUTE_GROUPS(phy_dev);
575 static const struct device_type mdio_bus_phy_type = {
577 .groups = phy_dev_groups,
578 .release = phy_device_release,
579 .pm = pm_ptr(&mdio_bus_phy_pm_ops),
582 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
586 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
587 MDIO_ID_ARGS(phy_id));
588 /* We only check for failures in executing the usermode binary,
589 * not whether a PHY driver module exists for the PHY ID.
590 * Accept -ENOENT because this may occur in case no initramfs exists,
591 * then modprobe isn't available.
593 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
594 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
595 ret, (unsigned long)phy_id);
602 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
604 struct phy_c45_device_ids *c45_ids)
606 struct phy_device *dev;
607 struct mdio_device *mdiodev;
610 /* We allocate the device, and initialize the default values */
611 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
613 return ERR_PTR(-ENOMEM);
615 mdiodev = &dev->mdio;
616 mdiodev->dev.parent = &bus->dev;
617 mdiodev->dev.bus = &mdio_bus_type;
618 mdiodev->dev.type = &mdio_bus_phy_type;
620 mdiodev->bus_match = phy_bus_match;
621 mdiodev->addr = addr;
622 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
623 mdiodev->device_free = phy_mdio_device_free;
624 mdiodev->device_remove = phy_mdio_device_remove;
626 dev->speed = SPEED_UNKNOWN;
627 dev->duplex = DUPLEX_UNKNOWN;
632 dev->interface = PHY_INTERFACE_MODE_GMII;
634 dev->autoneg = AUTONEG_ENABLE;
636 dev->pma_extable = -ENODATA;
637 dev->is_c45 = is_c45;
638 dev->phy_id = phy_id;
640 dev->c45_ids = *c45_ids;
641 dev->irq = bus->irq[addr];
643 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
644 device_initialize(&mdiodev->dev);
646 dev->state = PHY_DOWN;
648 mutex_init(&dev->lock);
649 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
651 /* Request the appropriate module unconditionally; don't
652 * bother trying to do so only if it isn't already loaded,
653 * because that gets complicated. A hotplug event would have
654 * done an unconditional modprobe anyway.
655 * We don't do normal hotplug because it won't work for MDIO
656 * -- because it relies on the device staying around for long
657 * enough for the driver to get loaded. With MDIO, the NIC
658 * driver will get bored and give up as soon as it finds that
659 * there's no driver _already_ loaded.
661 if (is_c45 && c45_ids) {
662 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
665 for (i = 1; i < num_ids; i++) {
666 if (c45_ids->device_ids[i] == 0xffffffff)
669 ret = phy_request_driver_module(dev,
670 c45_ids->device_ids[i]);
675 ret = phy_request_driver_module(dev, phy_id);
679 put_device(&mdiodev->dev);
685 EXPORT_SYMBOL(phy_device_create);
687 /* phy_c45_probe_present - checks to see if a MMD is present in the package
688 * @bus: the target MII bus
689 * @prtad: PHY package address on the MII bus
690 * @devad: PHY device (MMD) address
692 * Read the MDIO_STAT2 register, and check whether a device is responding
695 * Returns: negative error number on bus access error, zero if no device
696 * is responding, or positive if a device is present.
698 static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad)
702 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2);
706 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL;
709 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
710 * @bus: the target MII bus
711 * @addr: PHY address on the MII bus
712 * @dev_addr: MMD address in the PHY.
713 * @devices_in_package: where to store the devices in package information.
715 * Description: reads devices in package registers of a MMD at @dev_addr
716 * from PHY at @addr on @bus.
718 * Returns: 0 on success, -EIO on failure.
720 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
721 u32 *devices_in_package)
725 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2);
728 *devices_in_package = phy_reg << 16;
730 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1);
733 *devices_in_package |= phy_reg;
739 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
740 * @bus: the target MII bus
741 * @addr: PHY address on the MII bus
742 * @c45_ids: where to store the c45 ID information.
744 * Read the PHY "devices in package". If this appears to be valid, read
745 * the PHY identifiers for each device. Return the "devices in package"
746 * and identifiers in @c45_ids.
748 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
749 * the "devices in package" is invalid.
751 static int get_phy_c45_ids(struct mii_bus *bus, int addr,
752 struct phy_c45_device_ids *c45_ids)
754 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
758 /* Find first non-zero Devices In package. Device zero is reserved
759 * for 802.3 c45 complied PHYs, so don't probe it at first.
761 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 ||
762 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) {
763 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
764 /* Check that there is a device present at this
765 * address before reading the devices-in-package
766 * register to avoid reading garbage from the PHY.
767 * Some PHYs (88x3310) vendor space is not IEEE802.3
770 ret = phy_c45_probe_present(bus, addr, i);
777 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg);
782 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) {
783 /* If mostly Fs, there is no device there, then let's probe
784 * MMD 0, as some 10G PHYs have zero Devices In package,
785 * e.g. Cortina CS4315/CS4340 PHY.
787 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg);
791 /* no device there, let's get out of here */
792 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff)
796 /* Now probe Device Identifiers for each device present. */
797 for (i = 1; i < num_ids; i++) {
798 if (!(devs_in_pkg & (1 << i)))
801 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
802 /* Probe the "Device Present" bits for the vendor MMDs
803 * to ignore these if they do not contain IEEE 802.3
806 ret = phy_c45_probe_present(bus, addr, i);
814 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1);
817 c45_ids->device_ids[i] = phy_reg << 16;
819 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2);
822 c45_ids->device_ids[i] |= phy_reg;
825 c45_ids->devices_in_package = devs_in_pkg;
826 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
827 c45_ids->mmds_present = devs_in_pkg & ~BIT(0);
833 * get_phy_c22_id - reads the specified addr for its clause 22 ID.
834 * @bus: the target MII bus
835 * @addr: PHY address on the MII bus
836 * @phy_id: where to store the ID retrieved.
838 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus,
839 * placing it in @phy_id. Return zero on successful read and the ID is
840 * valid, %-EIO on bus access error, or %-ENODEV if no device responds
843 static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
847 /* Grab the bits from PHYIR1, and put them in the upper half */
848 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
850 /* returning -ENODEV doesn't stop bus scanning */
851 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
854 *phy_id = phy_reg << 16;
856 /* Grab the bits from PHYIR2, and put them in the lower half */
857 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
859 /* returning -ENODEV doesn't stop bus scanning */
860 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
865 /* If the phy_id is mostly Fs, there is no device there */
866 if ((*phy_id & 0x1fffffff) == 0x1fffffff)
872 /* Extract the phy ID from the compatible string of the form
873 * ethernet-phy-idAAAA.BBBB.
875 int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
877 unsigned int upper, lower;
881 ret = fwnode_property_read_string(fwnode, "compatible", &cp);
885 if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
888 *phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
891 EXPORT_SYMBOL(fwnode_get_phy_id);
894 * get_phy_device - reads the specified PHY device and returns its @phy_device
896 * @bus: the target MII bus
897 * @addr: PHY address on the MII bus
898 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
900 * Probe for a PHY at @addr on @bus.
902 * When probing for a clause 22 PHY, then read the ID registers. If we find
903 * a valid ID, allocate and return a &struct phy_device.
905 * When probing for a clause 45 PHY, read the "devices in package" registers.
906 * If the "devices in package" appears valid, read the ID registers for each
907 * MMD, allocate and return a &struct phy_device.
909 * Returns an allocated &struct phy_device on success, %-ENODEV if there is
910 * no PHY present, or %-EIO on bus access error.
912 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
914 struct phy_c45_device_ids c45_ids;
918 c45_ids.devices_in_package = 0;
919 c45_ids.mmds_present = 0;
920 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
923 r = get_phy_c45_ids(bus, addr, &c45_ids);
925 r = get_phy_c22_id(bus, addr, &phy_id);
930 /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID
931 * of 0 when probed using get_phy_c22_id() with no error. Proceed to
932 * probe with C45 to see if we're able to get a valid PHY ID in the C45
933 * space, if successful, create the C45 PHY device.
935 if (!is_c45 && phy_id == 0 && bus->probe_capabilities >= MDIOBUS_C45) {
936 r = get_phy_c45_ids(bus, addr, &c45_ids);
938 return phy_device_create(bus, addr, phy_id,
942 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
944 EXPORT_SYMBOL(get_phy_device);
947 * phy_device_register - Register the phy device on the MDIO bus
948 * @phydev: phy_device structure to be added to the MDIO bus
950 int phy_device_register(struct phy_device *phydev)
954 err = mdiobus_register_device(&phydev->mdio);
958 /* Deassert the reset signal */
959 phy_device_reset(phydev, 0);
961 /* Run all of the fixups for this PHY */
962 err = phy_scan_fixups(phydev);
964 phydev_err(phydev, "failed to initialize\n");
968 err = device_add(&phydev->mdio.dev);
970 phydev_err(phydev, "failed to add\n");
977 /* Assert the reset signal */
978 phy_device_reset(phydev, 1);
980 mdiobus_unregister_device(&phydev->mdio);
983 EXPORT_SYMBOL(phy_device_register);
986 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
987 * @phydev: phy_device structure to remove
989 * This doesn't free the phy_device itself, it merely reverses the effects
990 * of phy_device_register(). Use phy_device_free() to free the device
991 * after calling this function.
993 void phy_device_remove(struct phy_device *phydev)
995 unregister_mii_timestamper(phydev->mii_ts);
996 pse_control_put(phydev->psec);
998 device_del(&phydev->mdio.dev);
1000 /* Assert the reset signal */
1001 phy_device_reset(phydev, 1);
1003 mdiobus_unregister_device(&phydev->mdio);
1005 EXPORT_SYMBOL(phy_device_remove);
1008 * phy_get_c45_ids - Read 802.3-c45 IDs for phy device.
1009 * @phydev: phy_device structure to read 802.3-c45 IDs
1011 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
1012 * the "devices in package" is invalid.
1014 int phy_get_c45_ids(struct phy_device *phydev)
1016 return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
1019 EXPORT_SYMBOL(phy_get_c45_ids);
1022 * phy_find_first - finds the first PHY device on the bus
1023 * @bus: the target MII bus
1025 struct phy_device *phy_find_first(struct mii_bus *bus)
1027 struct phy_device *phydev;
1030 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
1031 phydev = mdiobus_get_phy(bus, addr);
1037 EXPORT_SYMBOL(phy_find_first);
1039 static void phy_link_change(struct phy_device *phydev, bool up)
1041 struct net_device *netdev = phydev->attached_dev;
1044 netif_carrier_on(netdev);
1046 netif_carrier_off(netdev);
1047 phydev->adjust_link(netdev);
1048 if (phydev->mii_ts && phydev->mii_ts->link_state)
1049 phydev->mii_ts->link_state(phydev->mii_ts, phydev);
1053 * phy_prepare_link - prepares the PHY layer to monitor link status
1054 * @phydev: target phy_device struct
1055 * @handler: callback function for link status change notifications
1057 * Description: Tells the PHY infrastructure to handle the
1058 * gory details on monitoring link status (whether through
1059 * polling or an interrupt), and to call back to the
1060 * connected device driver when the link status changes.
1061 * If you want to monitor your own link state, don't call
1064 static void phy_prepare_link(struct phy_device *phydev,
1065 void (*handler)(struct net_device *))
1067 phydev->adjust_link = handler;
1071 * phy_connect_direct - connect an ethernet device to a specific phy_device
1072 * @dev: the network device to connect
1073 * @phydev: the pointer to the phy device
1074 * @handler: callback function for state change notifications
1075 * @interface: PHY device's interface
1077 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
1078 void (*handler)(struct net_device *),
1079 phy_interface_t interface)
1086 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1090 phy_prepare_link(phydev, handler);
1091 if (phy_interrupt_is_valid(phydev))
1092 phy_request_interrupt(phydev);
1096 EXPORT_SYMBOL(phy_connect_direct);
1099 * phy_connect - connect an ethernet device to a PHY device
1100 * @dev: the network device to connect
1101 * @bus_id: the id string of the PHY device to connect
1102 * @handler: callback function for state change notifications
1103 * @interface: PHY device's interface
1105 * Description: Convenience function for connecting ethernet
1106 * devices to PHY devices. The default behavior is for
1107 * the PHY infrastructure to handle everything, and only notify
1108 * the connected driver when the link status changes. If you
1109 * don't want, or can't use the provided functionality, you may
1110 * choose to call only the subset of functions which provide
1111 * the desired functionality.
1113 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
1114 void (*handler)(struct net_device *),
1115 phy_interface_t interface)
1117 struct phy_device *phydev;
1121 /* Search the list of PHY devices on the mdio bus for the
1122 * PHY with the requested name
1124 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1126 pr_err("PHY %s not found\n", bus_id);
1127 return ERR_PTR(-ENODEV);
1129 phydev = to_phy_device(d);
1131 rc = phy_connect_direct(dev, phydev, handler, interface);
1138 EXPORT_SYMBOL(phy_connect);
1141 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1143 * @phydev: target phy_device struct
1145 void phy_disconnect(struct phy_device *phydev)
1147 if (phy_is_started(phydev))
1150 if (phy_interrupt_is_valid(phydev))
1151 phy_free_interrupt(phydev);
1153 phydev->adjust_link = NULL;
1157 EXPORT_SYMBOL(phy_disconnect);
1160 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1161 * @phydev: The PHY device to poll
1163 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1164 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1165 * register must be polled until the BMCR_RESET bit clears.
1167 * Furthermore, any attempts to write to PHY registers may have no effect
1168 * or even generate MDIO bus errors until this is complete.
1170 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1171 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1172 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1173 * effort to support such broken PHYs, this function is separate from the
1174 * standard phy_init_hw() which will zero all the other bits in the BMCR
1175 * and reapply all driver-specific and board-specific fixups.
1177 static int phy_poll_reset(struct phy_device *phydev)
1179 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1182 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
1183 50000, 600000, true);
1186 /* Some chips (smsc911x) may still need up to another 1ms after the
1187 * BMCR_RESET bit is cleared before they are usable.
1193 int phy_init_hw(struct phy_device *phydev)
1197 /* Deassert the reset signal */
1198 phy_device_reset(phydev, 0);
1203 if (phydev->drv->soft_reset) {
1204 ret = phydev->drv->soft_reset(phydev);
1205 /* see comment in genphy_soft_reset for an explanation */
1207 phydev->suspended = 0;
1213 ret = phy_scan_fixups(phydev);
1217 if (phydev->drv->config_init) {
1218 ret = phydev->drv->config_init(phydev);
1223 if (phydev->drv->config_intr) {
1224 ret = phydev->drv->config_intr(phydev);
1231 EXPORT_SYMBOL(phy_init_hw);
1233 void phy_attached_info(struct phy_device *phydev)
1235 phy_attached_print(phydev, NULL);
1237 EXPORT_SYMBOL(phy_attached_info);
1239 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)"
1240 char *phy_attached_info_irq(struct phy_device *phydev)
1245 switch(phydev->irq) {
1249 case PHY_MAC_INTERRUPT:
1253 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1258 return kasprintf(GFP_KERNEL, "%s", irq_str);
1260 EXPORT_SYMBOL(phy_attached_info_irq);
1262 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1264 const char *unbound = phydev->drv ? "" : "[unbound] ";
1265 char *irq_str = phy_attached_info_irq(phydev);
1268 phydev_info(phydev, ATTACHED_FMT "\n", unbound,
1269 phydev_name(phydev), irq_str);
1273 phydev_info(phydev, ATTACHED_FMT, unbound,
1274 phydev_name(phydev), irq_str);
1282 EXPORT_SYMBOL(phy_attached_print);
1284 static void phy_sysfs_create_links(struct phy_device *phydev)
1286 struct net_device *dev = phydev->attached_dev;
1292 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1297 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1298 &phydev->mdio.dev.kobj,
1301 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1302 kobject_name(&phydev->mdio.dev.kobj),
1304 /* non-fatal - some net drivers can use one netdevice
1305 * with more then one phy
1309 phydev->sysfs_links = true;
1313 phy_standalone_show(struct device *dev, struct device_attribute *attr,
1316 struct phy_device *phydev = to_phy_device(dev);
1318 return sysfs_emit(buf, "%d\n", !phydev->attached_dev);
1320 static DEVICE_ATTR_RO(phy_standalone);
1323 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1324 * @upstream: pointer to the phy device
1325 * @bus: sfp bus representing cage being attached
1327 * This is used to fill in the sfp_upstream_ops .attach member.
1329 void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1331 struct phy_device *phydev = upstream;
1333 if (phydev->attached_dev)
1334 phydev->attached_dev->sfp_bus = bus;
1335 phydev->sfp_bus_attached = true;
1337 EXPORT_SYMBOL(phy_sfp_attach);
1340 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1341 * @upstream: pointer to the phy device
1342 * @bus: sfp bus representing cage being attached
1344 * This is used to fill in the sfp_upstream_ops .detach member.
1346 void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1348 struct phy_device *phydev = upstream;
1350 if (phydev->attached_dev)
1351 phydev->attached_dev->sfp_bus = NULL;
1352 phydev->sfp_bus_attached = false;
1354 EXPORT_SYMBOL(phy_sfp_detach);
1357 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1358 * @phydev: Pointer to phy_device
1359 * @ops: SFP's upstream operations
1361 int phy_sfp_probe(struct phy_device *phydev,
1362 const struct sfp_upstream_ops *ops)
1364 struct sfp_bus *bus;
1367 if (phydev->mdio.dev.fwnode) {
1368 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1370 return PTR_ERR(bus);
1372 phydev->sfp_bus = bus;
1374 ret = sfp_bus_add_upstream(bus, phydev, ops);
1379 EXPORT_SYMBOL(phy_sfp_probe);
1382 * phy_attach_direct - attach a network device to a given PHY device pointer
1383 * @dev: network device to attach
1384 * @phydev: Pointer to phy_device to attach
1385 * @flags: PHY device's dev_flags
1386 * @interface: PHY device's interface
1388 * Description: Called by drivers to attach to a particular PHY
1389 * device. The phy_device is found, and properly hooked up
1390 * to the phy_driver. If no driver is attached, then a
1391 * generic driver is used. The phy_device is given a ptr to
1392 * the attaching device, and given a callback for link status
1393 * change. The phy_device is returned to the attaching driver.
1394 * This function takes a reference on the phy device.
1396 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1397 u32 flags, phy_interface_t interface)
1399 struct mii_bus *bus = phydev->mdio.bus;
1400 struct device *d = &phydev->mdio.dev;
1401 struct module *ndev_owner = NULL;
1402 bool using_genphy = false;
1405 /* For Ethernet device drivers that register their own MDIO bus, we
1406 * will have bus->owner match ndev_mod, so we do not want to increment
1407 * our own module->refcnt here, otherwise we would not be able to
1411 ndev_owner = dev->dev.parent->driver->owner;
1412 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1413 phydev_err(phydev, "failed to get the bus module\n");
1419 /* Assume that if there is no driver, that it doesn't
1420 * exist, and we should use the genphy driver.
1424 d->driver = &genphy_c45_driver.mdiodrv.driver;
1426 d->driver = &genphy_driver.mdiodrv.driver;
1428 using_genphy = true;
1431 if (!try_module_get(d->driver->owner)) {
1432 phydev_err(phydev, "failed to get the device driver module\n");
1434 goto error_put_device;
1438 err = d->driver->probe(d);
1440 err = device_bind_driver(d);
1443 goto error_module_put;
1446 if (phydev->attached_dev) {
1447 dev_err(&dev->dev, "PHY already attached\n");
1452 phydev->phy_link_change = phy_link_change;
1454 phydev->attached_dev = dev;
1455 dev->phydev = phydev;
1457 if (phydev->sfp_bus_attached)
1458 dev->sfp_bus = phydev->sfp_bus;
1459 else if (dev->sfp_bus)
1460 phydev->is_on_sfp_module = true;
1463 /* Some Ethernet drivers try to connect to a PHY device before
1464 * calling register_netdevice() -> netdev_register_kobject() and
1465 * does the dev->dev.kobj initialization. Here we only check for
1466 * success which indicates that the network device kobject is
1467 * ready. Once we do that we still need to keep track of whether
1468 * links were successfully set up or not for phy_detach() to
1469 * remove them accordingly.
1471 phydev->sysfs_links = false;
1473 phy_sysfs_create_links(phydev);
1475 if (!phydev->attached_dev) {
1476 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1477 &dev_attr_phy_standalone.attr);
1479 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1482 phydev->dev_flags |= flags;
1484 phydev->interface = interface;
1486 phydev->state = PHY_READY;
1488 phydev->interrupts = PHY_INTERRUPT_DISABLED;
1490 /* Port is set to PORT_TP by default and the actual PHY driver will set
1491 * it to different value depending on the PHY configuration. If we have
1492 * the generic PHY driver we can't figure it out, thus set the old
1493 * legacy PORT_MII value.
1496 phydev->port = PORT_MII;
1498 /* Initial carrier state is off as the phy is about to be
1502 netif_carrier_off(phydev->attached_dev);
1504 /* Do initial configuration here, now that
1505 * we have certain key parameters
1506 * (dev_flags and interface)
1508 err = phy_init_hw(phydev);
1513 phy_led_triggers_register(phydev);
1516 * If the external phy used by current mac interface is managed by
1517 * another mac interface, so we should create a device link between
1518 * phy dev and mac dev.
1520 if (phydev->mdio.bus->parent && dev->dev.parent != phydev->mdio.bus->parent)
1521 phydev->devlink = device_link_add(dev->dev.parent, &phydev->mdio.dev,
1522 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
1527 /* phy_detach() does all of the cleanup below */
1532 module_put(d->driver->owner);
1536 if (ndev_owner != bus->owner)
1537 module_put(bus->owner);
1540 EXPORT_SYMBOL(phy_attach_direct);
1543 * phy_attach - attach a network device to a particular PHY device
1544 * @dev: network device to attach
1545 * @bus_id: Bus ID of PHY device to attach
1546 * @interface: PHY device's interface
1548 * Description: Same as phy_attach_direct() except that a PHY bus_id
1549 * string is passed instead of a pointer to a struct phy_device.
1551 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1552 phy_interface_t interface)
1554 struct bus_type *bus = &mdio_bus_type;
1555 struct phy_device *phydev;
1560 return ERR_PTR(-EINVAL);
1562 /* Search the list of PHY devices on the mdio bus for the
1563 * PHY with the requested name
1565 d = bus_find_device_by_name(bus, NULL, bus_id);
1567 pr_err("PHY %s not found\n", bus_id);
1568 return ERR_PTR(-ENODEV);
1570 phydev = to_phy_device(d);
1572 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1579 EXPORT_SYMBOL(phy_attach);
1581 static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1582 struct device_driver *driver)
1584 struct device *d = &phydev->mdio.dev;
1591 ret = d->driver == driver;
1597 bool phy_driver_is_genphy(struct phy_device *phydev)
1599 return phy_driver_is_genphy_kind(phydev,
1600 &genphy_driver.mdiodrv.driver);
1602 EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1604 bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1606 return phy_driver_is_genphy_kind(phydev,
1607 &genphy_c45_driver.mdiodrv.driver);
1609 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1612 * phy_package_join - join a common PHY group
1613 * @phydev: target phy_device struct
1614 * @addr: cookie and PHY address for global register access
1615 * @priv_size: if non-zero allocate this amount of bytes for private data
1617 * This joins a PHY group and provides a shared storage for all phydevs in
1618 * this group. This is intended to be used for packages which contain
1619 * more than one PHY, for example a quad PHY transceiver.
1621 * The addr parameter serves as a cookie which has to have the same value
1622 * for all members of one group and as a PHY address to access generic
1623 * registers of a PHY package. Usually, one of the PHY addresses of the
1624 * different PHYs in the package provides access to these global registers.
1625 * The address which is given here, will be used in the phy_package_read()
1626 * and phy_package_write() convenience functions. If your PHY doesn't have
1627 * global registers you can just pick any of the PHY addresses.
1629 * This will set the shared pointer of the phydev to the shared storage.
1630 * If this is the first call for a this cookie the shared storage will be
1631 * allocated. If priv_size is non-zero, the given amount of bytes are
1632 * allocated for the priv member.
1634 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join()
1635 * with the same cookie but a different priv_size is an error.
1637 int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size)
1639 struct mii_bus *bus = phydev->mdio.bus;
1640 struct phy_package_shared *shared;
1643 if (addr < 0 || addr >= PHY_MAX_ADDR)
1646 mutex_lock(&bus->shared_lock);
1647 shared = bus->shared[addr];
1650 shared = kzalloc(sizeof(*shared), GFP_KERNEL);
1654 shared->priv = kzalloc(priv_size, GFP_KERNEL);
1657 shared->priv_size = priv_size;
1659 shared->addr = addr;
1660 refcount_set(&shared->refcnt, 1);
1661 bus->shared[addr] = shared;
1664 if (priv_size && priv_size != shared->priv_size)
1666 refcount_inc(&shared->refcnt);
1668 mutex_unlock(&bus->shared_lock);
1670 phydev->shared = shared;
1677 mutex_unlock(&bus->shared_lock);
1680 EXPORT_SYMBOL_GPL(phy_package_join);
1683 * phy_package_leave - leave a common PHY group
1684 * @phydev: target phy_device struct
1686 * This leaves a PHY group created by phy_package_join(). If this phydev
1687 * was the last user of the shared data between the group, this data is
1688 * freed. Resets the phydev->shared pointer to NULL.
1690 void phy_package_leave(struct phy_device *phydev)
1692 struct phy_package_shared *shared = phydev->shared;
1693 struct mii_bus *bus = phydev->mdio.bus;
1698 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) {
1699 bus->shared[shared->addr] = NULL;
1700 mutex_unlock(&bus->shared_lock);
1701 kfree(shared->priv);
1705 phydev->shared = NULL;
1707 EXPORT_SYMBOL_GPL(phy_package_leave);
1709 static void devm_phy_package_leave(struct device *dev, void *res)
1711 phy_package_leave(*(struct phy_device **)res);
1715 * devm_phy_package_join - resource managed phy_package_join()
1716 * @dev: device that is registering this PHY package
1717 * @phydev: target phy_device struct
1718 * @addr: cookie and PHY address for global register access
1719 * @priv_size: if non-zero allocate this amount of bytes for private data
1721 * Managed phy_package_join(). Shared storage fetched by this function,
1722 * phy_package_leave() is automatically called on driver detach. See
1723 * phy_package_join() for more information.
1725 int devm_phy_package_join(struct device *dev, struct phy_device *phydev,
1726 int addr, size_t priv_size)
1728 struct phy_device **ptr;
1731 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
1736 ret = phy_package_join(phydev, addr, priv_size);
1740 devres_add(dev, ptr);
1747 EXPORT_SYMBOL_GPL(devm_phy_package_join);
1750 * phy_detach - detach a PHY device from its network device
1751 * @phydev: target phy_device struct
1753 * This detaches the phy device from its network device and the phy
1754 * driver, and drops the reference count taken in phy_attach_direct().
1756 void phy_detach(struct phy_device *phydev)
1758 struct net_device *dev = phydev->attached_dev;
1759 struct module *ndev_owner = NULL;
1760 struct mii_bus *bus;
1762 if (phydev->devlink)
1763 device_link_del(phydev->devlink);
1765 if (phydev->sysfs_links) {
1767 sysfs_remove_link(&dev->dev.kobj, "phydev");
1768 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1771 if (!phydev->attached_dev)
1772 sysfs_remove_file(&phydev->mdio.dev.kobj,
1773 &dev_attr_phy_standalone.attr);
1775 phy_suspend(phydev);
1777 phydev->attached_dev->phydev = NULL;
1778 phydev->attached_dev = NULL;
1780 phydev->phylink = NULL;
1782 phy_led_triggers_unregister(phydev);
1784 if (phydev->mdio.dev.driver)
1785 module_put(phydev->mdio.dev.driver->owner);
1787 /* If the device had no specific driver before (i.e. - it
1788 * was using the generic driver), we unbind the device
1789 * from the generic driver so that there's a chance a
1790 * real driver could be loaded
1792 if (phy_driver_is_genphy(phydev) ||
1793 phy_driver_is_genphy_10g(phydev))
1794 device_release_driver(&phydev->mdio.dev);
1796 /* Assert the reset signal */
1797 phy_device_reset(phydev, 1);
1800 * The phydev might go away on the put_device() below, so avoid
1801 * a use-after-free bug by reading the underlying bus first.
1803 bus = phydev->mdio.bus;
1805 put_device(&phydev->mdio.dev);
1807 ndev_owner = dev->dev.parent->driver->owner;
1808 if (ndev_owner != bus->owner)
1809 module_put(bus->owner);
1811 EXPORT_SYMBOL(phy_detach);
1813 int phy_suspend(struct phy_device *phydev)
1815 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1816 struct net_device *netdev = phydev->attached_dev;
1817 struct phy_driver *phydrv = phydev->drv;
1820 if (phydev->suspended)
1823 /* If the device has WOL enabled, we cannot suspend the PHY */
1824 phy_ethtool_get_wol(phydev, &wol);
1825 if (wol.wolopts || (netdev && netdev->wol_enabled))
1828 if (!phydrv || !phydrv->suspend)
1831 ret = phydrv->suspend(phydev);
1833 phydev->suspended = true;
1837 EXPORT_SYMBOL(phy_suspend);
1839 int __phy_resume(struct phy_device *phydev)
1841 struct phy_driver *phydrv = phydev->drv;
1844 lockdep_assert_held(&phydev->lock);
1846 if (!phydrv || !phydrv->resume)
1849 ret = phydrv->resume(phydev);
1851 phydev->suspended = false;
1855 EXPORT_SYMBOL(__phy_resume);
1857 int phy_resume(struct phy_device *phydev)
1861 mutex_lock(&phydev->lock);
1862 ret = __phy_resume(phydev);
1863 mutex_unlock(&phydev->lock);
1867 EXPORT_SYMBOL(phy_resume);
1869 int phy_loopback(struct phy_device *phydev, bool enable)
1876 mutex_lock(&phydev->lock);
1878 if (enable && phydev->loopback_enabled) {
1883 if (!enable && !phydev->loopback_enabled) {
1888 if (phydev->drv->set_loopback)
1889 ret = phydev->drv->set_loopback(phydev, enable);
1891 ret = genphy_loopback(phydev, enable);
1896 phydev->loopback_enabled = enable;
1899 mutex_unlock(&phydev->lock);
1902 EXPORT_SYMBOL(phy_loopback);
1905 * phy_reset_after_clk_enable - perform a PHY reset if needed
1906 * @phydev: target phy_device struct
1908 * Description: Some PHYs are known to need a reset after their refclk was
1909 * enabled. This function evaluates the flags and perform the reset if it's
1910 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1913 int phy_reset_after_clk_enable(struct phy_device *phydev)
1915 if (!phydev || !phydev->drv)
1918 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1919 phy_device_reset(phydev, 1);
1920 phy_device_reset(phydev, 0);
1926 EXPORT_SYMBOL(phy_reset_after_clk_enable);
1928 /* Generic PHY support and helper functions */
1931 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1932 * @phydev: target phy_device struct
1934 * Description: Writes MII_ADVERTISE with the appropriate values,
1935 * after sanitizing the values to make sure we only advertise
1936 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1937 * hasn't changed, and > 0 if it has changed.
1939 static int genphy_config_advert(struct phy_device *phydev)
1941 int err, bmsr, changed = 0;
1944 /* Only allow advertising what this PHY supports */
1945 linkmode_and(phydev->advertising, phydev->advertising,
1948 adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
1950 /* Setup standard advertisement */
1951 err = phy_modify_changed(phydev, MII_ADVERTISE,
1952 ADVERTISE_ALL | ADVERTISE_100BASE4 |
1953 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
1960 bmsr = phy_read(phydev, MII_BMSR);
1964 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1965 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1968 if (!(bmsr & BMSR_ESTATEN))
1971 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
1973 err = phy_modify_changed(phydev, MII_CTRL1000,
1974 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
1985 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
1986 * @phydev: target phy_device struct
1988 * Description: Writes MII_ADVERTISE with the appropriate values,
1989 * after sanitizing the values to make sure we only advertise
1990 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1991 * hasn't changed, and > 0 if it has changed. This function is intended
1992 * for Clause 37 1000Base-X mode.
1994 static int genphy_c37_config_advert(struct phy_device *phydev)
1998 /* Only allow advertising what this PHY supports */
1999 linkmode_and(phydev->advertising, phydev->advertising,
2002 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2003 phydev->advertising))
2004 adv |= ADVERTISE_1000XFULL;
2005 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2006 phydev->advertising))
2007 adv |= ADVERTISE_1000XPAUSE;
2008 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2009 phydev->advertising))
2010 adv |= ADVERTISE_1000XPSE_ASYM;
2012 return phy_modify_changed(phydev, MII_ADVERTISE,
2013 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
2014 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
2019 * genphy_config_eee_advert - disable unwanted eee mode advertisement
2020 * @phydev: target phy_device struct
2022 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
2023 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
2024 * changed, and 1 if it has changed.
2026 int genphy_config_eee_advert(struct phy_device *phydev)
2030 /* Nothing to disable */
2031 if (!phydev->eee_broken_modes)
2034 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
2035 phydev->eee_broken_modes, 0);
2036 /* If the call failed, we assume that EEE is not supported */
2037 return err < 0 ? 0 : err;
2039 EXPORT_SYMBOL(genphy_config_eee_advert);
2042 * genphy_setup_forced - configures/forces speed/duplex from @phydev
2043 * @phydev: target phy_device struct
2045 * Description: Configures MII_BMCR to force speed/duplex
2046 * to the values in phydev. Assumes that the values are valid.
2047 * Please see phy_sanitize_settings().
2049 int genphy_setup_forced(struct phy_device *phydev)
2054 phydev->asym_pause = 0;
2056 ctl = mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2058 return phy_modify(phydev, MII_BMCR,
2059 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
2061 EXPORT_SYMBOL(genphy_setup_forced);
2063 static int genphy_setup_master_slave(struct phy_device *phydev)
2067 if (!phydev->is_gigabit_capable)
2070 switch (phydev->master_slave_set) {
2071 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
2072 ctl |= CTL1000_PREFER_MASTER;
2074 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
2076 case MASTER_SLAVE_CFG_MASTER_FORCE:
2077 ctl |= CTL1000_AS_MASTER;
2079 case MASTER_SLAVE_CFG_SLAVE_FORCE:
2080 ctl |= CTL1000_ENABLE_MASTER;
2082 case MASTER_SLAVE_CFG_UNKNOWN:
2083 case MASTER_SLAVE_CFG_UNSUPPORTED:
2086 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
2090 return phy_modify_changed(phydev, MII_CTRL1000,
2091 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER |
2092 CTL1000_PREFER_MASTER), ctl);
2095 int genphy_read_master_slave(struct phy_device *phydev)
2100 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
2101 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
2103 val = phy_read(phydev, MII_CTRL1000);
2107 if (val & CTL1000_ENABLE_MASTER) {
2108 if (val & CTL1000_AS_MASTER)
2109 cfg = MASTER_SLAVE_CFG_MASTER_FORCE;
2111 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE;
2113 if (val & CTL1000_PREFER_MASTER)
2114 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED;
2116 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
2119 val = phy_read(phydev, MII_STAT1000);
2123 if (val & LPA_1000MSFAIL) {
2124 state = MASTER_SLAVE_STATE_ERR;
2125 } else if (phydev->link) {
2126 /* this bits are valid only for active link */
2127 if (val & LPA_1000MSRES)
2128 state = MASTER_SLAVE_STATE_MASTER;
2130 state = MASTER_SLAVE_STATE_SLAVE;
2132 state = MASTER_SLAVE_STATE_UNKNOWN;
2135 phydev->master_slave_get = cfg;
2136 phydev->master_slave_state = state;
2140 EXPORT_SYMBOL(genphy_read_master_slave);
2143 * genphy_restart_aneg - Enable and Restart Autonegotiation
2144 * @phydev: target phy_device struct
2146 int genphy_restart_aneg(struct phy_device *phydev)
2148 /* Don't isolate the PHY if we're negotiating */
2149 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
2150 BMCR_ANENABLE | BMCR_ANRESTART);
2152 EXPORT_SYMBOL(genphy_restart_aneg);
2155 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
2156 * @phydev: target phy_device struct
2157 * @restart: whether aneg restart is requested
2159 * Check, and restart auto-negotiation if needed.
2161 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
2166 /* Advertisement hasn't changed, but maybe aneg was never on to
2167 * begin with? Or maybe phy was isolated?
2169 ret = phy_read(phydev, MII_BMCR);
2173 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
2178 return genphy_restart_aneg(phydev);
2182 EXPORT_SYMBOL(genphy_check_and_restart_aneg);
2185 * __genphy_config_aneg - restart auto-negotiation or write BMCR
2186 * @phydev: target phy_device struct
2187 * @changed: whether autoneg is requested
2189 * Description: If auto-negotiation is enabled, we configure the
2190 * advertising, and then restart auto-negotiation. If it is not
2191 * enabled, then we write the BMCR.
2193 int __genphy_config_aneg(struct phy_device *phydev, bool changed)
2197 if (genphy_config_eee_advert(phydev))
2200 err = genphy_setup_master_slave(phydev);
2206 if (AUTONEG_ENABLE != phydev->autoneg)
2207 return genphy_setup_forced(phydev);
2209 err = genphy_config_advert(phydev);
2210 if (err < 0) /* error */
2215 return genphy_check_and_restart_aneg(phydev, changed);
2217 EXPORT_SYMBOL(__genphy_config_aneg);
2220 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
2221 * @phydev: target phy_device struct
2223 * Description: If auto-negotiation is enabled, we configure the
2224 * advertising, and then restart auto-negotiation. If it is not
2225 * enabled, then we write the BMCR. This function is intended
2226 * for use with Clause 37 1000Base-X mode.
2228 int genphy_c37_config_aneg(struct phy_device *phydev)
2232 if (phydev->autoneg != AUTONEG_ENABLE)
2233 return genphy_setup_forced(phydev);
2235 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
2240 changed = genphy_c37_config_advert(phydev);
2241 if (changed < 0) /* error */
2245 /* Advertisement hasn't changed, but maybe aneg was never on to
2246 * begin with? Or maybe phy was isolated?
2248 int ctl = phy_read(phydev, MII_BMCR);
2253 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
2254 changed = 1; /* do restart aneg */
2257 /* Only restart aneg if we are advertising something different
2258 * than we were before.
2261 return genphy_restart_aneg(phydev);
2265 EXPORT_SYMBOL(genphy_c37_config_aneg);
2268 * genphy_aneg_done - return auto-negotiation status
2269 * @phydev: target phy_device struct
2271 * Description: Reads the status register and returns 0 either if
2272 * auto-negotiation is incomplete, or if there was an error.
2273 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
2275 int genphy_aneg_done(struct phy_device *phydev)
2277 int retval = phy_read(phydev, MII_BMSR);
2279 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
2281 EXPORT_SYMBOL(genphy_aneg_done);
2284 * genphy_update_link - update link status in @phydev
2285 * @phydev: target phy_device struct
2287 * Description: Update the value in phydev->link to reflect the
2288 * current link value. In order to do this, we need to read
2289 * the status register twice, keeping the second value.
2291 int genphy_update_link(struct phy_device *phydev)
2293 int status = 0, bmcr;
2295 bmcr = phy_read(phydev, MII_BMCR);
2299 /* Autoneg is being started, therefore disregard BMSR value and
2300 * report link as down.
2302 if (bmcr & BMCR_ANRESTART)
2305 /* The link state is latched low so that momentary link
2306 * drops can be detected. Do not double-read the status
2307 * in polling mode to detect such short link drops except
2308 * the link was already down.
2310 if (!phy_polling_mode(phydev) || !phydev->link) {
2311 status = phy_read(phydev, MII_BMSR);
2314 else if (status & BMSR_LSTATUS)
2318 /* Read link and autonegotiation status */
2319 status = phy_read(phydev, MII_BMSR);
2323 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
2324 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
2326 /* Consider the case that autoneg was started and "aneg complete"
2327 * bit has been reset, but "link up" bit not yet.
2329 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
2334 EXPORT_SYMBOL(genphy_update_link);
2336 int genphy_read_lpa(struct phy_device *phydev)
2340 if (phydev->autoneg == AUTONEG_ENABLE) {
2341 if (!phydev->autoneg_complete) {
2342 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2344 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
2348 if (phydev->is_gigabit_capable) {
2349 lpagb = phy_read(phydev, MII_STAT1000);
2353 if (lpagb & LPA_1000MSFAIL) {
2354 int adv = phy_read(phydev, MII_CTRL1000);
2359 if (adv & CTL1000_ENABLE_MASTER)
2360 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
2362 phydev_err(phydev, "Master/Slave resolution failed\n");
2366 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2370 lpa = phy_read(phydev, MII_LPA);
2374 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
2376 linkmode_zero(phydev->lp_advertising);
2381 EXPORT_SYMBOL(genphy_read_lpa);
2384 * genphy_read_status_fixed - read the link parameters for !aneg mode
2385 * @phydev: target phy_device struct
2387 * Read the current duplex and speed state for a PHY operating with
2388 * autonegotiation disabled.
2390 int genphy_read_status_fixed(struct phy_device *phydev)
2392 int bmcr = phy_read(phydev, MII_BMCR);
2397 if (bmcr & BMCR_FULLDPLX)
2398 phydev->duplex = DUPLEX_FULL;
2400 phydev->duplex = DUPLEX_HALF;
2402 if (bmcr & BMCR_SPEED1000)
2403 phydev->speed = SPEED_1000;
2404 else if (bmcr & BMCR_SPEED100)
2405 phydev->speed = SPEED_100;
2407 phydev->speed = SPEED_10;
2411 EXPORT_SYMBOL(genphy_read_status_fixed);
2414 * genphy_read_status - check the link status and update current link state
2415 * @phydev: target phy_device struct
2417 * Description: Check the link, then figure out the current state
2418 * by comparing what we advertise with what the link partner
2419 * advertises. Start by checking the gigabit possibilities,
2420 * then move on to 10/100.
2422 int genphy_read_status(struct phy_device *phydev)
2424 int err, old_link = phydev->link;
2426 /* Update the link, but return if there was an error */
2427 err = genphy_update_link(phydev);
2431 /* why bother the PHY if nothing can have changed */
2432 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2435 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
2436 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
2437 phydev->speed = SPEED_UNKNOWN;
2438 phydev->duplex = DUPLEX_UNKNOWN;
2440 phydev->asym_pause = 0;
2442 if (phydev->is_gigabit_capable) {
2443 err = genphy_read_master_slave(phydev);
2448 err = genphy_read_lpa(phydev);
2452 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2453 phy_resolve_aneg_linkmode(phydev);
2454 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2455 err = genphy_read_status_fixed(phydev);
2462 EXPORT_SYMBOL(genphy_read_status);
2465 * genphy_c37_read_status - check the link status and update current link state
2466 * @phydev: target phy_device struct
2468 * Description: Check the link, then figure out the current state
2469 * by comparing what we advertise with what the link partner
2470 * advertises. This function is for Clause 37 1000Base-X mode.
2472 int genphy_c37_read_status(struct phy_device *phydev)
2474 int lpa, err, old_link = phydev->link;
2476 /* Update the link, but return if there was an error */
2477 err = genphy_update_link(phydev);
2481 /* why bother the PHY if nothing can have changed */
2482 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2485 phydev->duplex = DUPLEX_UNKNOWN;
2487 phydev->asym_pause = 0;
2489 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2490 lpa = phy_read(phydev, MII_LPA);
2494 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2495 phydev->lp_advertising, lpa & LPA_LPACK);
2496 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2497 phydev->lp_advertising, lpa & LPA_1000XFULL);
2498 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2499 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2500 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2501 phydev->lp_advertising,
2502 lpa & LPA_1000XPAUSE_ASYM);
2504 phy_resolve_aneg_linkmode(phydev);
2505 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2506 int bmcr = phy_read(phydev, MII_BMCR);
2511 if (bmcr & BMCR_FULLDPLX)
2512 phydev->duplex = DUPLEX_FULL;
2514 phydev->duplex = DUPLEX_HALF;
2519 EXPORT_SYMBOL(genphy_c37_read_status);
2522 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2523 * @phydev: target phy_device struct
2525 * Description: Perform a software PHY reset using the standard
2526 * BMCR_RESET bit and poll for the reset bit to be cleared.
2528 * Returns: 0 on success, < 0 on failure
2530 int genphy_soft_reset(struct phy_device *phydev)
2532 u16 res = BMCR_RESET;
2535 if (phydev->autoneg == AUTONEG_ENABLE)
2536 res |= BMCR_ANRESTART;
2538 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2542 /* Clause 22 states that setting bit BMCR_RESET sets control registers
2543 * to their default value. Therefore the POWER DOWN bit is supposed to
2544 * be cleared after soft reset.
2546 phydev->suspended = 0;
2548 ret = phy_poll_reset(phydev);
2552 /* BMCR may be reset to defaults */
2553 if (phydev->autoneg == AUTONEG_DISABLE)
2554 ret = genphy_setup_forced(phydev);
2558 EXPORT_SYMBOL(genphy_soft_reset);
2560 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev)
2562 /* It seems there are cases where the interrupts are handled by another
2563 * entity (ie an IRQ controller embedded inside the PHY) and do not
2564 * need any other interraction from phylib. In this case, just trigger
2565 * the state machine directly.
2567 phy_trigger_machine(phydev);
2571 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack);
2574 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2575 * @phydev: target phy_device struct
2577 * Description: Reads the PHY's abilities and populates
2578 * phydev->supported accordingly.
2580 * Returns: 0 on success, < 0 on failure
2582 int genphy_read_abilities(struct phy_device *phydev)
2586 linkmode_set_bit_array(phy_basic_ports_array,
2587 ARRAY_SIZE(phy_basic_ports_array),
2590 val = phy_read(phydev, MII_BMSR);
2594 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2595 val & BMSR_ANEGCAPABLE);
2597 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2598 val & BMSR_100FULL);
2599 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2600 val & BMSR_100HALF);
2601 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2603 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2606 if (val & BMSR_ESTATEN) {
2607 val = phy_read(phydev, MII_ESTATUS);
2611 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2612 phydev->supported, val & ESTATUS_1000_TFULL);
2613 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2614 phydev->supported, val & ESTATUS_1000_THALF);
2615 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2616 phydev->supported, val & ESTATUS_1000_XFULL);
2621 EXPORT_SYMBOL(genphy_read_abilities);
2623 /* This is used for the phy device which doesn't support the MMD extended
2624 * register access, but it does have side effect when we are trying to access
2625 * the MMD register via indirect method.
2627 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2631 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2633 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2634 u16 regnum, u16 val)
2638 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2640 int genphy_suspend(struct phy_device *phydev)
2642 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2644 EXPORT_SYMBOL(genphy_suspend);
2646 int genphy_resume(struct phy_device *phydev)
2648 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2650 EXPORT_SYMBOL(genphy_resume);
2652 int genphy_loopback(struct phy_device *phydev, bool enable)
2655 u16 val, ctl = BMCR_LOOPBACK;
2658 ctl |= mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2660 phy_modify(phydev, MII_BMCR, ~0, ctl);
2662 ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
2664 5000, 500000, true);
2668 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
2670 phy_config_aneg(phydev);
2675 EXPORT_SYMBOL(genphy_loopback);
2678 * phy_remove_link_mode - Remove a supported link mode
2679 * @phydev: phy_device structure to remove link mode from
2680 * @link_mode: Link mode to be removed
2682 * Description: Some MACs don't support all link modes which the PHY
2683 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2684 * to remove a link mode.
2686 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2688 linkmode_clear_bit(link_mode, phydev->supported);
2689 phy_advertise_supported(phydev);
2691 EXPORT_SYMBOL(phy_remove_link_mode);
2693 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2695 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2696 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2697 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2698 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2702 * phy_advertise_supported - Advertise all supported modes
2703 * @phydev: target phy_device struct
2705 * Description: Called to advertise all supported modes, doesn't touch
2706 * pause mode advertising.
2708 void phy_advertise_supported(struct phy_device *phydev)
2710 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2712 linkmode_copy(new, phydev->supported);
2713 phy_copy_pause_bits(new, phydev->advertising);
2714 linkmode_copy(phydev->advertising, new);
2716 EXPORT_SYMBOL(phy_advertise_supported);
2719 * phy_support_sym_pause - Enable support of symmetrical pause
2720 * @phydev: target phy_device struct
2722 * Description: Called by the MAC to indicate is supports symmetrical
2723 * Pause, but not asym pause.
2725 void phy_support_sym_pause(struct phy_device *phydev)
2727 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
2728 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2730 EXPORT_SYMBOL(phy_support_sym_pause);
2733 * phy_support_asym_pause - Enable support of asym pause
2734 * @phydev: target phy_device struct
2736 * Description: Called by the MAC to indicate is supports Asym Pause.
2738 void phy_support_asym_pause(struct phy_device *phydev)
2740 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2742 EXPORT_SYMBOL(phy_support_asym_pause);
2745 * phy_set_sym_pause - Configure symmetric Pause
2746 * @phydev: target phy_device struct
2747 * @rx: Receiver Pause is supported
2748 * @tx: Transmit Pause is supported
2749 * @autoneg: Auto neg should be used
2751 * Description: Configure advertised Pause support depending on if
2752 * receiver pause and pause auto neg is supported. Generally called
2753 * from the set_pauseparam .ndo.
2755 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
2758 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
2760 if (rx && tx && autoneg)
2761 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2764 linkmode_copy(phydev->advertising, phydev->supported);
2766 EXPORT_SYMBOL(phy_set_sym_pause);
2769 * phy_set_asym_pause - Configure Pause and Asym Pause
2770 * @phydev: target phy_device struct
2771 * @rx: Receiver Pause is supported
2772 * @tx: Transmit Pause is supported
2774 * Description: Configure advertised Pause support depending on if
2775 * transmit and receiver pause is supported. If there has been a
2776 * change in adverting, trigger a new autoneg. Generally called from
2777 * the set_pauseparam .ndo.
2779 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
2781 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
2783 linkmode_copy(oldadv, phydev->advertising);
2784 linkmode_set_pause(phydev->advertising, tx, rx);
2786 if (!linkmode_equal(oldadv, phydev->advertising) &&
2788 phy_start_aneg(phydev);
2790 EXPORT_SYMBOL(phy_set_asym_pause);
2793 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
2794 * @phydev: phy_device struct
2795 * @pp: requested pause configuration
2797 * Description: Test if the PHY/MAC combination supports the Pause
2798 * configuration the user is requesting. Returns True if it is
2799 * supported, false otherwise.
2801 bool phy_validate_pause(struct phy_device *phydev,
2802 struct ethtool_pauseparam *pp)
2804 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2805 phydev->supported) && pp->rx_pause)
2808 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2809 phydev->supported) &&
2810 pp->rx_pause != pp->tx_pause)
2815 EXPORT_SYMBOL(phy_validate_pause);
2818 * phy_get_pause - resolve negotiated pause modes
2819 * @phydev: phy_device struct
2820 * @tx_pause: pointer to bool to indicate whether transmit pause should be
2822 * @rx_pause: pointer to bool to indicate whether receive pause should be
2825 * Resolve and return the flow control modes according to the negotiation
2826 * result. This includes checking that we are operating in full duplex mode.
2827 * See linkmode_resolve_pause() for further details.
2829 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
2831 if (phydev->duplex != DUPLEX_FULL) {
2837 return linkmode_resolve_pause(phydev->advertising,
2838 phydev->lp_advertising,
2839 tx_pause, rx_pause);
2841 EXPORT_SYMBOL(phy_get_pause);
2843 #if IS_ENABLED(CONFIG_OF_MDIO)
2844 static int phy_get_int_delay_property(struct device *dev, const char *name)
2849 ret = device_property_read_u32(dev, name, &int_delay);
2856 static int phy_get_int_delay_property(struct device *dev, const char *name)
2863 * phy_get_internal_delay - returns the index of the internal delay
2864 * @phydev: phy_device struct
2865 * @dev: pointer to the devices device struct
2866 * @delay_values: array of delays the PHY supports
2867 * @size: the size of the delay array
2868 * @is_rx: boolean to indicate to get the rx internal delay
2870 * Returns the index within the array of internal delay passed in.
2871 * If the device property is not present then the interface type is checked
2872 * if the interface defines use of internal delay then a 1 is returned otherwise
2874 * The array must be in ascending order. If PHY does not have an ascending order
2875 * array then size = 0 and the value of the delay property is returned.
2876 * Return -EINVAL if the delay is invalid or cannot be found.
2878 s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
2879 const int *delay_values, int size, bool is_rx)
2885 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
2886 if (delay < 0 && size == 0) {
2887 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2888 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
2895 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
2896 if (delay < 0 && size == 0) {
2897 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2898 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
2908 if (delay && size == 0)
2911 if (delay < delay_values[0] || delay > delay_values[size - 1]) {
2912 phydev_err(phydev, "Delay %d is out of range\n", delay);
2916 if (delay == delay_values[0])
2919 for (i = 1; i < size; i++) {
2920 if (delay == delay_values[i])
2923 /* Find an approximate index by looking up the table */
2924 if (delay > delay_values[i - 1] &&
2925 delay < delay_values[i]) {
2926 if (delay - delay_values[i - 1] <
2927 delay_values[i] - delay)
2934 phydev_err(phydev, "error finding internal delay index for %d\n",
2939 EXPORT_SYMBOL(phy_get_internal_delay);
2941 static bool phy_drv_supports_irq(struct phy_driver *phydrv)
2943 return phydrv->config_intr && phydrv->handle_interrupt;
2947 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device
2948 * @fwnode: pointer to the mdio_device's fwnode
2950 * If successful, returns a pointer to the mdio_device with the embedded
2951 * struct device refcount incremented by one, or NULL on failure.
2952 * The caller should call put_device() on the mdio_device after its use.
2954 struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
2961 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode);
2965 return to_mdio_device(d);
2967 EXPORT_SYMBOL(fwnode_mdio_find_device);
2970 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.
2972 * @phy_fwnode: Pointer to the phy's fwnode.
2974 * If successful, returns a pointer to the phy_device with the embedded
2975 * struct device refcount incremented by one, or NULL on failure.
2977 struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
2979 struct mdio_device *mdiodev;
2981 mdiodev = fwnode_mdio_find_device(phy_fwnode);
2985 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
2986 return to_phy_device(&mdiodev->dev);
2988 put_device(&mdiodev->dev);
2992 EXPORT_SYMBOL(fwnode_phy_find_device);
2995 * device_phy_find_device - For the given device, get the phy_device
2996 * @dev: Pointer to the given device
2998 * Refer return conditions of fwnode_phy_find_device().
3000 struct phy_device *device_phy_find_device(struct device *dev)
3002 return fwnode_phy_find_device(dev_fwnode(dev));
3004 EXPORT_SYMBOL_GPL(device_phy_find_device);
3007 * fwnode_get_phy_node - Get the phy_node using the named reference.
3008 * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
3010 * Refer return conditions of fwnode_find_reference().
3011 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"
3012 * and "phy-device" are not supported in ACPI. DT supports all the three
3013 * named references to the phy node.
3015 struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
3017 struct fwnode_handle *phy_node;
3019 /* Only phy-handle is used for ACPI */
3020 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
3021 if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
3023 phy_node = fwnode_find_reference(fwnode, "phy", 0);
3024 if (IS_ERR(phy_node))
3025 phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
3028 EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
3031 * phy_probe - probe and init a PHY device
3032 * @dev: device to probe and init
3034 * Description: Take care of setting up the phy_device structure,
3035 * set the state to READY (the driver's init function should
3036 * set it to STARTING if needed).
3038 static int phy_probe(struct device *dev)
3040 struct phy_device *phydev = to_phy_device(dev);
3041 struct device_driver *drv = phydev->mdio.dev.driver;
3042 struct phy_driver *phydrv = to_phy_driver(drv);
3045 phydev->drv = phydrv;
3047 /* Disable the interrupt if the PHY doesn't support it
3048 * but the interrupt is still a valid one
3050 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
3051 phydev->irq = PHY_POLL;
3053 if (phydrv->flags & PHY_IS_INTERNAL)
3054 phydev->is_internal = true;
3056 mutex_lock(&phydev->lock);
3058 /* Deassert the reset signal */
3059 phy_device_reset(phydev, 0);
3061 if (phydev->drv->probe) {
3062 err = phydev->drv->probe(phydev);
3067 /* Start out supporting everything. Eventually,
3068 * a controller will attach, and may modify one
3069 * or both of these values
3071 if (phydrv->features)
3072 linkmode_copy(phydev->supported, phydrv->features);
3073 else if (phydrv->get_features)
3074 err = phydrv->get_features(phydev);
3075 else if (phydev->is_c45)
3076 err = genphy_c45_pma_read_abilities(phydev);
3078 err = genphy_read_abilities(phydev);
3083 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
3085 phydev->autoneg = 0;
3087 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
3089 phydev->is_gigabit_capable = 1;
3090 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
3092 phydev->is_gigabit_capable = 1;
3094 of_set_phy_supported(phydev);
3095 phy_advertise_supported(phydev);
3097 /* Get the EEE modes we want to prohibit. We will ask
3098 * the PHY stop advertising these mode later on
3100 of_set_phy_eee_broken(phydev);
3102 /* The Pause Frame bits indicate that the PHY can support passing
3103 * pause frames. During autonegotiation, the PHYs will determine if
3104 * they should allow pause frames to pass. The MAC driver should then
3105 * use that result to determine whether to enable flow control via
3108 * Normally, PHY drivers should not set the Pause bits, and instead
3109 * allow phylib to do that. However, there may be some situations
3110 * (e.g. hardware erratum) where the driver wants to set only one
3113 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
3114 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
3115 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3117 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3121 /* Set the state to READY by default */
3122 phydev->state = PHY_READY;
3125 /* Assert the reset signal */
3127 phy_device_reset(phydev, 1);
3129 mutex_unlock(&phydev->lock);
3134 static int phy_remove(struct device *dev)
3136 struct phy_device *phydev = to_phy_device(dev);
3138 cancel_delayed_work_sync(&phydev->state_queue);
3140 mutex_lock(&phydev->lock);
3141 phydev->state = PHY_DOWN;
3142 mutex_unlock(&phydev->lock);
3144 sfp_bus_del_upstream(phydev->sfp_bus);
3145 phydev->sfp_bus = NULL;
3147 if (phydev->drv && phydev->drv->remove)
3148 phydev->drv->remove(phydev);
3150 /* Assert the reset signal */
3151 phy_device_reset(phydev, 1);
3158 static void phy_shutdown(struct device *dev)
3160 struct phy_device *phydev = to_phy_device(dev);
3162 if (phydev->state == PHY_READY || !phydev->attached_dev)
3165 phy_disable_interrupts(phydev);
3169 * phy_driver_register - register a phy_driver with the PHY layer
3170 * @new_driver: new phy_driver to register
3171 * @owner: module owning this PHY
3173 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
3177 /* Either the features are hard coded, or dynamically
3178 * determined. It cannot be both.
3180 if (WARN_ON(new_driver->features && new_driver->get_features)) {
3181 pr_err("%s: features and get_features must not both be set\n",
3186 /* PHYLIB device drivers must not match using a DT compatible table
3187 * as this bypasses our checks that the mdiodev that is being matched
3188 * is backed by a struct phy_device. If such a case happens, we will
3189 * make out-of-bounds accesses and lockup in phydev->lock.
3191 if (WARN(new_driver->mdiodrv.driver.of_match_table,
3192 "%s: driver must not provide a DT match table\n",
3196 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
3197 new_driver->mdiodrv.driver.name = new_driver->name;
3198 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
3199 new_driver->mdiodrv.driver.probe = phy_probe;
3200 new_driver->mdiodrv.driver.remove = phy_remove;
3201 new_driver->mdiodrv.driver.shutdown = phy_shutdown;
3202 new_driver->mdiodrv.driver.owner = owner;
3203 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
3205 retval = driver_register(&new_driver->mdiodrv.driver);
3207 pr_err("%s: Error %d in registering driver\n",
3208 new_driver->name, retval);
3213 pr_debug("%s: Registered new driver\n", new_driver->name);
3217 EXPORT_SYMBOL(phy_driver_register);
3219 int phy_drivers_register(struct phy_driver *new_driver, int n,
3220 struct module *owner)
3224 for (i = 0; i < n; i++) {
3225 ret = phy_driver_register(new_driver + i, owner);
3228 phy_driver_unregister(new_driver + i);
3234 EXPORT_SYMBOL(phy_drivers_register);
3236 void phy_driver_unregister(struct phy_driver *drv)
3238 driver_unregister(&drv->mdiodrv.driver);
3240 EXPORT_SYMBOL(phy_driver_unregister);
3242 void phy_drivers_unregister(struct phy_driver *drv, int n)
3246 for (i = 0; i < n; i++)
3247 phy_driver_unregister(drv + i);
3249 EXPORT_SYMBOL(phy_drivers_unregister);
3251 static struct phy_driver genphy_driver = {
3252 .phy_id = 0xffffffff,
3253 .phy_id_mask = 0xffffffff,
3254 .name = "Generic PHY",
3255 .get_features = genphy_read_abilities,
3256 .suspend = genphy_suspend,
3257 .resume = genphy_resume,
3258 .set_loopback = genphy_loopback,
3261 static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
3262 .get_sset_count = phy_ethtool_get_sset_count,
3263 .get_strings = phy_ethtool_get_strings,
3264 .get_stats = phy_ethtool_get_stats,
3265 .start_cable_test = phy_start_cable_test,
3266 .start_cable_test_tdr = phy_start_cable_test_tdr,
3269 static int __init phy_init(void)
3273 rc = mdio_bus_init();
3277 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
3280 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
3284 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
3286 phy_driver_unregister(&genphy_c45_driver);
3294 static void __exit phy_exit(void)
3296 phy_driver_unregister(&genphy_c45_driver);
3297 phy_driver_unregister(&genphy_driver);
3299 ethtool_set_ethtool_phy_ops(NULL);
3302 subsys_initcall(phy_init);
3303 module_exit(phy_exit);