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 kfree(to_phy_device(dev));
223 static void phy_mdio_device_remove(struct mdio_device *mdiodev)
225 struct phy_device *phydev;
227 phydev = container_of(mdiodev, struct phy_device, mdio);
228 phy_device_remove(phydev);
231 static struct phy_driver genphy_driver;
233 static LIST_HEAD(phy_fixup_list);
234 static DEFINE_MUTEX(phy_fixup_lock);
236 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
238 struct device_driver *drv = phydev->mdio.dev.driver;
239 struct phy_driver *phydrv = to_phy_driver(drv);
240 struct net_device *netdev = phydev->attached_dev;
242 if (!drv || !phydrv->suspend)
245 /* PHY not attached? May suspend if the PHY has not already been
246 * suspended as part of a prior call to phy_disconnect() ->
247 * phy_detach() -> phy_suspend() because the parent netdev might be the
248 * MDIO bus driver and clock gated at this point.
253 if (netdev->wol_enabled)
256 /* As long as not all affected network drivers support the
257 * wol_enabled flag, let's check for hints that WoL is enabled.
258 * Don't suspend PHY if the attached netdev parent may wake up.
259 * The parent may point to a PCI device, as in tg3 driver.
261 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
264 /* Also don't suspend PHY if the netdev itself may wakeup. This
265 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
268 if (device_may_wakeup(&netdev->dev))
272 return !phydev->suspended;
275 static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
277 struct phy_device *phydev = to_phy_device(dev);
279 if (phydev->mac_managed_pm)
282 /* Wakeup interrupts may occur during the system sleep transition when
283 * the PHY is inaccessible. Set flag to postpone handling until the PHY
284 * has resumed. Wait for concurrent interrupt handler to complete.
286 if (phy_interrupt_is_valid(phydev)) {
287 phydev->irq_suspended = 1;
288 synchronize_irq(phydev->irq);
291 /* We must stop the state machine manually, otherwise it stops out of
292 * control, possibly with the phydev->lock held. Upon resume, netdev
293 * may call phy routines that try to grab the same lock, and that may
294 * lead to a deadlock.
296 if (phydev->attached_dev && phydev->adjust_link)
297 phy_stop_machine(phydev);
299 if (!mdio_bus_phy_may_suspend(phydev))
302 phydev->suspended_by_mdio_bus = 1;
304 return phy_suspend(phydev);
307 static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
309 struct phy_device *phydev = to_phy_device(dev);
312 if (phydev->mac_managed_pm)
315 if (!phydev->suspended_by_mdio_bus)
318 phydev->suspended_by_mdio_bus = 0;
320 /* If we managed to get here with the PHY state machine in a state
321 * neither PHY_HALTED, PHY_READY nor PHY_UP, this is an indication
322 * that something went wrong and we should most likely be using
323 * MAC managed PM, but we are not.
325 WARN_ON(phydev->state != PHY_HALTED && phydev->state != PHY_READY &&
326 phydev->state != PHY_UP);
328 ret = phy_init_hw(phydev);
332 ret = phy_resume(phydev);
336 if (phy_interrupt_is_valid(phydev)) {
337 phydev->irq_suspended = 0;
338 synchronize_irq(phydev->irq);
340 /* Rerun interrupts which were postponed by phy_interrupt()
341 * because they occurred during the system sleep transition.
343 if (phydev->irq_rerun) {
344 phydev->irq_rerun = 0;
345 enable_irq(phydev->irq);
346 irq_wake_thread(phydev->irq, phydev);
350 if (phydev->attached_dev && phydev->adjust_link)
351 phy_start_machine(phydev);
356 static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend,
357 mdio_bus_phy_resume);
360 * phy_register_fixup - creates a new phy_fixup and adds it to the list
361 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
362 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
363 * It can also be PHY_ANY_UID
364 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
366 * @run: The actual code to be run when a matching PHY is found
368 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
369 int (*run)(struct phy_device *))
371 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
376 strscpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
377 fixup->phy_uid = phy_uid;
378 fixup->phy_uid_mask = phy_uid_mask;
381 mutex_lock(&phy_fixup_lock);
382 list_add_tail(&fixup->list, &phy_fixup_list);
383 mutex_unlock(&phy_fixup_lock);
387 EXPORT_SYMBOL(phy_register_fixup);
389 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
390 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
391 int (*run)(struct phy_device *))
393 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
395 EXPORT_SYMBOL(phy_register_fixup_for_uid);
397 /* Registers a fixup to be run on the PHY with id string bus_id */
398 int phy_register_fixup_for_id(const char *bus_id,
399 int (*run)(struct phy_device *))
401 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
403 EXPORT_SYMBOL(phy_register_fixup_for_id);
406 * phy_unregister_fixup - remove a phy_fixup from the list
407 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
408 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
409 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
411 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
413 struct list_head *pos, *n;
414 struct phy_fixup *fixup;
419 mutex_lock(&phy_fixup_lock);
420 list_for_each_safe(pos, n, &phy_fixup_list) {
421 fixup = list_entry(pos, struct phy_fixup, list);
423 if ((!strcmp(fixup->bus_id, bus_id)) &&
424 ((fixup->phy_uid & phy_uid_mask) ==
425 (phy_uid & phy_uid_mask))) {
426 list_del(&fixup->list);
432 mutex_unlock(&phy_fixup_lock);
436 EXPORT_SYMBOL(phy_unregister_fixup);
438 /* Unregisters a fixup of any PHY with the UID in phy_uid */
439 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
441 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
443 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
445 /* Unregisters a fixup of the PHY with id string bus_id */
446 int phy_unregister_fixup_for_id(const char *bus_id)
448 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
450 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
452 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
453 * Fixups can be set to match any in one or more fields.
455 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
457 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
458 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
461 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
462 (phydev->phy_id & fixup->phy_uid_mask))
463 if (fixup->phy_uid != PHY_ANY_UID)
469 /* Runs any matching fixups for this phydev */
470 static int phy_scan_fixups(struct phy_device *phydev)
472 struct phy_fixup *fixup;
474 mutex_lock(&phy_fixup_lock);
475 list_for_each_entry(fixup, &phy_fixup_list, list) {
476 if (phy_needs_fixup(phydev, fixup)) {
477 int err = fixup->run(phydev);
480 mutex_unlock(&phy_fixup_lock);
483 phydev->has_fixups = true;
486 mutex_unlock(&phy_fixup_lock);
491 static int phy_bus_match(struct device *dev, struct device_driver *drv)
493 struct phy_device *phydev = to_phy_device(dev);
494 struct phy_driver *phydrv = to_phy_driver(drv);
495 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
498 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
501 if (phydrv->match_phy_device)
502 return phydrv->match_phy_device(phydev);
504 if (phydev->is_c45) {
505 for (i = 1; i < num_ids; i++) {
506 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
509 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
510 (phydev->c45_ids.device_ids[i] &
511 phydrv->phy_id_mask))
516 return (phydrv->phy_id & phydrv->phy_id_mask) ==
517 (phydev->phy_id & phydrv->phy_id_mask);
522 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
524 struct phy_device *phydev = to_phy_device(dev);
526 return sysfs_emit(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
528 static DEVICE_ATTR_RO(phy_id);
531 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
533 struct phy_device *phydev = to_phy_device(dev);
534 const char *mode = NULL;
536 if (phy_is_internal(phydev))
539 mode = phy_modes(phydev->interface);
541 return sysfs_emit(buf, "%s\n", mode);
543 static DEVICE_ATTR_RO(phy_interface);
546 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
549 struct phy_device *phydev = to_phy_device(dev);
551 return sysfs_emit(buf, "%d\n", phydev->has_fixups);
553 static DEVICE_ATTR_RO(phy_has_fixups);
555 static ssize_t phy_dev_flags_show(struct device *dev,
556 struct device_attribute *attr,
559 struct phy_device *phydev = to_phy_device(dev);
561 return sysfs_emit(buf, "0x%08x\n", phydev->dev_flags);
563 static DEVICE_ATTR_RO(phy_dev_flags);
565 static struct attribute *phy_dev_attrs[] = {
566 &dev_attr_phy_id.attr,
567 &dev_attr_phy_interface.attr,
568 &dev_attr_phy_has_fixups.attr,
569 &dev_attr_phy_dev_flags.attr,
572 ATTRIBUTE_GROUPS(phy_dev);
574 static const struct device_type mdio_bus_phy_type = {
576 .groups = phy_dev_groups,
577 .release = phy_device_release,
578 .pm = pm_ptr(&mdio_bus_phy_pm_ops),
581 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
585 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
586 MDIO_ID_ARGS(phy_id));
587 /* We only check for failures in executing the usermode binary,
588 * not whether a PHY driver module exists for the PHY ID.
589 * Accept -ENOENT because this may occur in case no initramfs exists,
590 * then modprobe isn't available.
592 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
593 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
594 ret, (unsigned long)phy_id);
601 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
603 struct phy_c45_device_ids *c45_ids)
605 struct phy_device *dev;
606 struct mdio_device *mdiodev;
609 /* We allocate the device, and initialize the default values */
610 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
612 return ERR_PTR(-ENOMEM);
614 mdiodev = &dev->mdio;
615 mdiodev->dev.parent = &bus->dev;
616 mdiodev->dev.bus = &mdio_bus_type;
617 mdiodev->dev.type = &mdio_bus_phy_type;
619 mdiodev->bus_match = phy_bus_match;
620 mdiodev->addr = addr;
621 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
622 mdiodev->device_free = phy_mdio_device_free;
623 mdiodev->device_remove = phy_mdio_device_remove;
625 dev->speed = SPEED_UNKNOWN;
626 dev->duplex = DUPLEX_UNKNOWN;
631 dev->interface = PHY_INTERFACE_MODE_GMII;
633 dev->autoneg = AUTONEG_ENABLE;
635 dev->pma_extable = -ENODATA;
636 dev->is_c45 = is_c45;
637 dev->phy_id = phy_id;
639 dev->c45_ids = *c45_ids;
640 dev->irq = bus->irq[addr];
642 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
643 device_initialize(&mdiodev->dev);
645 dev->state = PHY_DOWN;
647 mutex_init(&dev->lock);
648 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
650 /* Request the appropriate module unconditionally; don't
651 * bother trying to do so only if it isn't already loaded,
652 * because that gets complicated. A hotplug event would have
653 * done an unconditional modprobe anyway.
654 * We don't do normal hotplug because it won't work for MDIO
655 * -- because it relies on the device staying around for long
656 * enough for the driver to get loaded. With MDIO, the NIC
657 * driver will get bored and give up as soon as it finds that
658 * there's no driver _already_ loaded.
660 if (is_c45 && c45_ids) {
661 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
664 for (i = 1; i < num_ids; i++) {
665 if (c45_ids->device_ids[i] == 0xffffffff)
668 ret = phy_request_driver_module(dev,
669 c45_ids->device_ids[i]);
674 ret = phy_request_driver_module(dev, phy_id);
678 put_device(&mdiodev->dev);
684 EXPORT_SYMBOL(phy_device_create);
686 /* phy_c45_probe_present - checks to see if a MMD is present in the package
687 * @bus: the target MII bus
688 * @prtad: PHY package address on the MII bus
689 * @devad: PHY device (MMD) address
691 * Read the MDIO_STAT2 register, and check whether a device is responding
694 * Returns: negative error number on bus access error, zero if no device
695 * is responding, or positive if a device is present.
697 static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad)
701 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2);
705 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL;
708 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
709 * @bus: the target MII bus
710 * @addr: PHY address on the MII bus
711 * @dev_addr: MMD address in the PHY.
712 * @devices_in_package: where to store the devices in package information.
714 * Description: reads devices in package registers of a MMD at @dev_addr
715 * from PHY at @addr on @bus.
717 * Returns: 0 on success, -EIO on failure.
719 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
720 u32 *devices_in_package)
724 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2);
727 *devices_in_package = phy_reg << 16;
729 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1);
732 *devices_in_package |= phy_reg;
738 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
739 * @bus: the target MII bus
740 * @addr: PHY address on the MII bus
741 * @c45_ids: where to store the c45 ID information.
743 * Read the PHY "devices in package". If this appears to be valid, read
744 * the PHY identifiers for each device. Return the "devices in package"
745 * and identifiers in @c45_ids.
747 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
748 * the "devices in package" is invalid.
750 static int get_phy_c45_ids(struct mii_bus *bus, int addr,
751 struct phy_c45_device_ids *c45_ids)
753 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
757 /* Find first non-zero Devices In package. Device zero is reserved
758 * for 802.3 c45 complied PHYs, so don't probe it at first.
760 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 ||
761 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) {
762 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
763 /* Check that there is a device present at this
764 * address before reading the devices-in-package
765 * register to avoid reading garbage from the PHY.
766 * Some PHYs (88x3310) vendor space is not IEEE802.3
769 ret = phy_c45_probe_present(bus, addr, i);
776 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg);
781 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) {
782 /* If mostly Fs, there is no device there, then let's probe
783 * MMD 0, as some 10G PHYs have zero Devices In package,
784 * e.g. Cortina CS4315/CS4340 PHY.
786 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg);
790 /* no device there, let's get out of here */
791 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff)
795 /* Now probe Device Identifiers for each device present. */
796 for (i = 1; i < num_ids; i++) {
797 if (!(devs_in_pkg & (1 << i)))
800 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
801 /* Probe the "Device Present" bits for the vendor MMDs
802 * to ignore these if they do not contain IEEE 802.3
805 ret = phy_c45_probe_present(bus, addr, i);
813 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1);
816 c45_ids->device_ids[i] = phy_reg << 16;
818 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2);
821 c45_ids->device_ids[i] |= phy_reg;
824 c45_ids->devices_in_package = devs_in_pkg;
825 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
826 c45_ids->mmds_present = devs_in_pkg & ~BIT(0);
832 * get_phy_c22_id - reads the specified addr for its clause 22 ID.
833 * @bus: the target MII bus
834 * @addr: PHY address on the MII bus
835 * @phy_id: where to store the ID retrieved.
837 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus,
838 * placing it in @phy_id. Return zero on successful read and the ID is
839 * valid, %-EIO on bus access error, or %-ENODEV if no device responds
842 static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
846 /* Grab the bits from PHYIR1, and put them in the upper half */
847 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
849 /* returning -ENODEV doesn't stop bus scanning */
850 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
853 *phy_id = phy_reg << 16;
855 /* Grab the bits from PHYIR2, and put them in the lower half */
856 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
858 /* returning -ENODEV doesn't stop bus scanning */
859 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
864 /* If the phy_id is mostly Fs, there is no device there */
865 if ((*phy_id & 0x1fffffff) == 0x1fffffff)
871 /* Extract the phy ID from the compatible string of the form
872 * ethernet-phy-idAAAA.BBBB.
874 int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
876 unsigned int upper, lower;
880 ret = fwnode_property_read_string(fwnode, "compatible", &cp);
884 if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
887 *phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
890 EXPORT_SYMBOL(fwnode_get_phy_id);
893 * get_phy_device - reads the specified PHY device and returns its @phy_device
895 * @bus: the target MII bus
896 * @addr: PHY address on the MII bus
897 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
899 * Probe for a PHY at @addr on @bus.
901 * When probing for a clause 22 PHY, then read the ID registers. If we find
902 * a valid ID, allocate and return a &struct phy_device.
904 * When probing for a clause 45 PHY, read the "devices in package" registers.
905 * If the "devices in package" appears valid, read the ID registers for each
906 * MMD, allocate and return a &struct phy_device.
908 * Returns an allocated &struct phy_device on success, %-ENODEV if there is
909 * no PHY present, or %-EIO on bus access error.
911 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
913 struct phy_c45_device_ids c45_ids;
917 c45_ids.devices_in_package = 0;
918 c45_ids.mmds_present = 0;
919 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
922 r = get_phy_c45_ids(bus, addr, &c45_ids);
924 r = get_phy_c22_id(bus, addr, &phy_id);
929 /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID
930 * of 0 when probed using get_phy_c22_id() with no error. Proceed to
931 * probe with C45 to see if we're able to get a valid PHY ID in the C45
932 * space, if successful, create the C45 PHY device.
934 if (!is_c45 && phy_id == 0 && bus->probe_capabilities >= MDIOBUS_C45) {
935 r = get_phy_c45_ids(bus, addr, &c45_ids);
937 return phy_device_create(bus, addr, phy_id,
941 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
943 EXPORT_SYMBOL(get_phy_device);
946 * phy_device_register - Register the phy device on the MDIO bus
947 * @phydev: phy_device structure to be added to the MDIO bus
949 int phy_device_register(struct phy_device *phydev)
953 err = mdiobus_register_device(&phydev->mdio);
957 /* Deassert the reset signal */
958 phy_device_reset(phydev, 0);
960 /* Run all of the fixups for this PHY */
961 err = phy_scan_fixups(phydev);
963 phydev_err(phydev, "failed to initialize\n");
967 err = device_add(&phydev->mdio.dev);
969 phydev_err(phydev, "failed to add\n");
976 /* Assert the reset signal */
977 phy_device_reset(phydev, 1);
979 mdiobus_unregister_device(&phydev->mdio);
982 EXPORT_SYMBOL(phy_device_register);
985 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
986 * @phydev: phy_device structure to remove
988 * This doesn't free the phy_device itself, it merely reverses the effects
989 * of phy_device_register(). Use phy_device_free() to free the device
990 * after calling this function.
992 void phy_device_remove(struct phy_device *phydev)
994 unregister_mii_timestamper(phydev->mii_ts);
995 pse_control_put(phydev->psec);
997 device_del(&phydev->mdio.dev);
999 /* Assert the reset signal */
1000 phy_device_reset(phydev, 1);
1002 mdiobus_unregister_device(&phydev->mdio);
1004 EXPORT_SYMBOL(phy_device_remove);
1007 * phy_get_c45_ids - Read 802.3-c45 IDs for phy device.
1008 * @phydev: phy_device structure to read 802.3-c45 IDs
1010 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
1011 * the "devices in package" is invalid.
1013 int phy_get_c45_ids(struct phy_device *phydev)
1015 return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
1018 EXPORT_SYMBOL(phy_get_c45_ids);
1021 * phy_find_first - finds the first PHY device on the bus
1022 * @bus: the target MII bus
1024 struct phy_device *phy_find_first(struct mii_bus *bus)
1026 struct phy_device *phydev;
1029 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
1030 phydev = mdiobus_get_phy(bus, addr);
1036 EXPORT_SYMBOL(phy_find_first);
1038 static void phy_link_change(struct phy_device *phydev, bool up)
1040 struct net_device *netdev = phydev->attached_dev;
1043 netif_carrier_on(netdev);
1045 netif_carrier_off(netdev);
1046 phydev->adjust_link(netdev);
1047 if (phydev->mii_ts && phydev->mii_ts->link_state)
1048 phydev->mii_ts->link_state(phydev->mii_ts, phydev);
1052 * phy_prepare_link - prepares the PHY layer to monitor link status
1053 * @phydev: target phy_device struct
1054 * @handler: callback function for link status change notifications
1056 * Description: Tells the PHY infrastructure to handle the
1057 * gory details on monitoring link status (whether through
1058 * polling or an interrupt), and to call back to the
1059 * connected device driver when the link status changes.
1060 * If you want to monitor your own link state, don't call
1063 static void phy_prepare_link(struct phy_device *phydev,
1064 void (*handler)(struct net_device *))
1066 phydev->adjust_link = handler;
1070 * phy_connect_direct - connect an ethernet device to a specific phy_device
1071 * @dev: the network device to connect
1072 * @phydev: the pointer to the phy device
1073 * @handler: callback function for state change notifications
1074 * @interface: PHY device's interface
1076 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
1077 void (*handler)(struct net_device *),
1078 phy_interface_t interface)
1085 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1089 phy_prepare_link(phydev, handler);
1090 if (phy_interrupt_is_valid(phydev))
1091 phy_request_interrupt(phydev);
1095 EXPORT_SYMBOL(phy_connect_direct);
1098 * phy_connect - connect an ethernet device to a PHY device
1099 * @dev: the network device to connect
1100 * @bus_id: the id string of the PHY device to connect
1101 * @handler: callback function for state change notifications
1102 * @interface: PHY device's interface
1104 * Description: Convenience function for connecting ethernet
1105 * devices to PHY devices. The default behavior is for
1106 * the PHY infrastructure to handle everything, and only notify
1107 * the connected driver when the link status changes. If you
1108 * don't want, or can't use the provided functionality, you may
1109 * choose to call only the subset of functions which provide
1110 * the desired functionality.
1112 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
1113 void (*handler)(struct net_device *),
1114 phy_interface_t interface)
1116 struct phy_device *phydev;
1120 /* Search the list of PHY devices on the mdio bus for the
1121 * PHY with the requested name
1123 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1125 pr_err("PHY %s not found\n", bus_id);
1126 return ERR_PTR(-ENODEV);
1128 phydev = to_phy_device(d);
1130 rc = phy_connect_direct(dev, phydev, handler, interface);
1137 EXPORT_SYMBOL(phy_connect);
1140 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1142 * @phydev: target phy_device struct
1144 void phy_disconnect(struct phy_device *phydev)
1146 if (phy_is_started(phydev))
1149 if (phy_interrupt_is_valid(phydev))
1150 phy_free_interrupt(phydev);
1152 phydev->adjust_link = NULL;
1156 EXPORT_SYMBOL(phy_disconnect);
1159 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1160 * @phydev: The PHY device to poll
1162 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1163 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1164 * register must be polled until the BMCR_RESET bit clears.
1166 * Furthermore, any attempts to write to PHY registers may have no effect
1167 * or even generate MDIO bus errors until this is complete.
1169 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1170 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1171 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1172 * effort to support such broken PHYs, this function is separate from the
1173 * standard phy_init_hw() which will zero all the other bits in the BMCR
1174 * and reapply all driver-specific and board-specific fixups.
1176 static int phy_poll_reset(struct phy_device *phydev)
1178 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1181 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
1182 50000, 600000, true);
1185 /* Some chips (smsc911x) may still need up to another 1ms after the
1186 * BMCR_RESET bit is cleared before they are usable.
1192 int phy_init_hw(struct phy_device *phydev)
1196 /* Deassert the reset signal */
1197 phy_device_reset(phydev, 0);
1202 if (phydev->drv->soft_reset) {
1203 ret = phydev->drv->soft_reset(phydev);
1204 /* see comment in genphy_soft_reset for an explanation */
1206 phydev->suspended = 0;
1212 ret = phy_scan_fixups(phydev);
1216 if (phydev->drv->config_init) {
1217 ret = phydev->drv->config_init(phydev);
1222 if (phydev->drv->config_intr) {
1223 ret = phydev->drv->config_intr(phydev);
1230 EXPORT_SYMBOL(phy_init_hw);
1232 void phy_attached_info(struct phy_device *phydev)
1234 phy_attached_print(phydev, NULL);
1236 EXPORT_SYMBOL(phy_attached_info);
1238 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)"
1239 char *phy_attached_info_irq(struct phy_device *phydev)
1244 switch(phydev->irq) {
1248 case PHY_MAC_INTERRUPT:
1252 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1257 return kasprintf(GFP_KERNEL, "%s", irq_str);
1259 EXPORT_SYMBOL(phy_attached_info_irq);
1261 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1263 const char *unbound = phydev->drv ? "" : "[unbound] ";
1264 char *irq_str = phy_attached_info_irq(phydev);
1267 phydev_info(phydev, ATTACHED_FMT "\n", unbound,
1268 phydev_name(phydev), irq_str);
1272 phydev_info(phydev, ATTACHED_FMT, unbound,
1273 phydev_name(phydev), irq_str);
1281 EXPORT_SYMBOL(phy_attached_print);
1283 static void phy_sysfs_create_links(struct phy_device *phydev)
1285 struct net_device *dev = phydev->attached_dev;
1291 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1296 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1297 &phydev->mdio.dev.kobj,
1300 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1301 kobject_name(&phydev->mdio.dev.kobj),
1303 /* non-fatal - some net drivers can use one netdevice
1304 * with more then one phy
1308 phydev->sysfs_links = true;
1312 phy_standalone_show(struct device *dev, struct device_attribute *attr,
1315 struct phy_device *phydev = to_phy_device(dev);
1317 return sysfs_emit(buf, "%d\n", !phydev->attached_dev);
1319 static DEVICE_ATTR_RO(phy_standalone);
1322 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1323 * @upstream: pointer to the phy device
1324 * @bus: sfp bus representing cage being attached
1326 * This is used to fill in the sfp_upstream_ops .attach member.
1328 void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1330 struct phy_device *phydev = upstream;
1332 if (phydev->attached_dev)
1333 phydev->attached_dev->sfp_bus = bus;
1334 phydev->sfp_bus_attached = true;
1336 EXPORT_SYMBOL(phy_sfp_attach);
1339 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1340 * @upstream: pointer to the phy device
1341 * @bus: sfp bus representing cage being attached
1343 * This is used to fill in the sfp_upstream_ops .detach member.
1345 void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1347 struct phy_device *phydev = upstream;
1349 if (phydev->attached_dev)
1350 phydev->attached_dev->sfp_bus = NULL;
1351 phydev->sfp_bus_attached = false;
1353 EXPORT_SYMBOL(phy_sfp_detach);
1356 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1357 * @phydev: Pointer to phy_device
1358 * @ops: SFP's upstream operations
1360 int phy_sfp_probe(struct phy_device *phydev,
1361 const struct sfp_upstream_ops *ops)
1363 struct sfp_bus *bus;
1366 if (phydev->mdio.dev.fwnode) {
1367 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1369 return PTR_ERR(bus);
1371 phydev->sfp_bus = bus;
1373 ret = sfp_bus_add_upstream(bus, phydev, ops);
1378 EXPORT_SYMBOL(phy_sfp_probe);
1381 * phy_attach_direct - attach a network device to a given PHY device pointer
1382 * @dev: network device to attach
1383 * @phydev: Pointer to phy_device to attach
1384 * @flags: PHY device's dev_flags
1385 * @interface: PHY device's interface
1387 * Description: Called by drivers to attach to a particular PHY
1388 * device. The phy_device is found, and properly hooked up
1389 * to the phy_driver. If no driver is attached, then a
1390 * generic driver is used. The phy_device is given a ptr to
1391 * the attaching device, and given a callback for link status
1392 * change. The phy_device is returned to the attaching driver.
1393 * This function takes a reference on the phy device.
1395 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1396 u32 flags, phy_interface_t interface)
1398 struct mii_bus *bus = phydev->mdio.bus;
1399 struct device *d = &phydev->mdio.dev;
1400 struct module *ndev_owner = NULL;
1401 bool using_genphy = false;
1404 /* For Ethernet device drivers that register their own MDIO bus, we
1405 * will have bus->owner match ndev_mod, so we do not want to increment
1406 * our own module->refcnt here, otherwise we would not be able to
1410 ndev_owner = dev->dev.parent->driver->owner;
1411 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1412 phydev_err(phydev, "failed to get the bus module\n");
1418 /* Assume that if there is no driver, that it doesn't
1419 * exist, and we should use the genphy driver.
1423 d->driver = &genphy_c45_driver.mdiodrv.driver;
1425 d->driver = &genphy_driver.mdiodrv.driver;
1427 using_genphy = true;
1430 if (!try_module_get(d->driver->owner)) {
1431 phydev_err(phydev, "failed to get the device driver module\n");
1433 goto error_put_device;
1437 err = d->driver->probe(d);
1439 err = device_bind_driver(d);
1442 goto error_module_put;
1445 if (phydev->attached_dev) {
1446 dev_err(&dev->dev, "PHY already attached\n");
1451 phydev->phy_link_change = phy_link_change;
1453 phydev->attached_dev = dev;
1454 dev->phydev = phydev;
1456 if (phydev->sfp_bus_attached)
1457 dev->sfp_bus = phydev->sfp_bus;
1458 else if (dev->sfp_bus)
1459 phydev->is_on_sfp_module = true;
1462 /* Some Ethernet drivers try to connect to a PHY device before
1463 * calling register_netdevice() -> netdev_register_kobject() and
1464 * does the dev->dev.kobj initialization. Here we only check for
1465 * success which indicates that the network device kobject is
1466 * ready. Once we do that we still need to keep track of whether
1467 * links were successfully set up or not for phy_detach() to
1468 * remove them accordingly.
1470 phydev->sysfs_links = false;
1472 phy_sysfs_create_links(phydev);
1474 if (!phydev->attached_dev) {
1475 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1476 &dev_attr_phy_standalone.attr);
1478 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1481 phydev->dev_flags |= flags;
1483 phydev->interface = interface;
1485 phydev->state = PHY_READY;
1487 phydev->interrupts = PHY_INTERRUPT_DISABLED;
1489 /* Port is set to PORT_TP by default and the actual PHY driver will set
1490 * it to different value depending on the PHY configuration. If we have
1491 * the generic PHY driver we can't figure it out, thus set the old
1492 * legacy PORT_MII value.
1495 phydev->port = PORT_MII;
1497 /* Initial carrier state is off as the phy is about to be
1501 netif_carrier_off(phydev->attached_dev);
1503 /* Do initial configuration here, now that
1504 * we have certain key parameters
1505 * (dev_flags and interface)
1507 err = phy_init_hw(phydev);
1512 phy_led_triggers_register(phydev);
1517 /* phy_detach() does all of the cleanup below */
1522 module_put(d->driver->owner);
1525 if (ndev_owner != bus->owner)
1526 module_put(bus->owner);
1529 EXPORT_SYMBOL(phy_attach_direct);
1532 * phy_attach - attach a network device to a particular PHY device
1533 * @dev: network device to attach
1534 * @bus_id: Bus ID of PHY device to attach
1535 * @interface: PHY device's interface
1537 * Description: Same as phy_attach_direct() except that a PHY bus_id
1538 * string is passed instead of a pointer to a struct phy_device.
1540 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1541 phy_interface_t interface)
1543 struct bus_type *bus = &mdio_bus_type;
1544 struct phy_device *phydev;
1549 return ERR_PTR(-EINVAL);
1551 /* Search the list of PHY devices on the mdio bus for the
1552 * PHY with the requested name
1554 d = bus_find_device_by_name(bus, NULL, bus_id);
1556 pr_err("PHY %s not found\n", bus_id);
1557 return ERR_PTR(-ENODEV);
1559 phydev = to_phy_device(d);
1561 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1568 EXPORT_SYMBOL(phy_attach);
1570 static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1571 struct device_driver *driver)
1573 struct device *d = &phydev->mdio.dev;
1580 ret = d->driver == driver;
1586 bool phy_driver_is_genphy(struct phy_device *phydev)
1588 return phy_driver_is_genphy_kind(phydev,
1589 &genphy_driver.mdiodrv.driver);
1591 EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1593 bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1595 return phy_driver_is_genphy_kind(phydev,
1596 &genphy_c45_driver.mdiodrv.driver);
1598 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1601 * phy_package_join - join a common PHY group
1602 * @phydev: target phy_device struct
1603 * @addr: cookie and PHY address for global register access
1604 * @priv_size: if non-zero allocate this amount of bytes for private data
1606 * This joins a PHY group and provides a shared storage for all phydevs in
1607 * this group. This is intended to be used for packages which contain
1608 * more than one PHY, for example a quad PHY transceiver.
1610 * The addr parameter serves as a cookie which has to have the same value
1611 * for all members of one group and as a PHY address to access generic
1612 * registers of a PHY package. Usually, one of the PHY addresses of the
1613 * different PHYs in the package provides access to these global registers.
1614 * The address which is given here, will be used in the phy_package_read()
1615 * and phy_package_write() convenience functions. If your PHY doesn't have
1616 * global registers you can just pick any of the PHY addresses.
1618 * This will set the shared pointer of the phydev to the shared storage.
1619 * If this is the first call for a this cookie the shared storage will be
1620 * allocated. If priv_size is non-zero, the given amount of bytes are
1621 * allocated for the priv member.
1623 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join()
1624 * with the same cookie but a different priv_size is an error.
1626 int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size)
1628 struct mii_bus *bus = phydev->mdio.bus;
1629 struct phy_package_shared *shared;
1632 if (addr < 0 || addr >= PHY_MAX_ADDR)
1635 mutex_lock(&bus->shared_lock);
1636 shared = bus->shared[addr];
1639 shared = kzalloc(sizeof(*shared), GFP_KERNEL);
1643 shared->priv = kzalloc(priv_size, GFP_KERNEL);
1646 shared->priv_size = priv_size;
1648 shared->addr = addr;
1649 refcount_set(&shared->refcnt, 1);
1650 bus->shared[addr] = shared;
1653 if (priv_size && priv_size != shared->priv_size)
1655 refcount_inc(&shared->refcnt);
1657 mutex_unlock(&bus->shared_lock);
1659 phydev->shared = shared;
1666 mutex_unlock(&bus->shared_lock);
1669 EXPORT_SYMBOL_GPL(phy_package_join);
1672 * phy_package_leave - leave a common PHY group
1673 * @phydev: target phy_device struct
1675 * This leaves a PHY group created by phy_package_join(). If this phydev
1676 * was the last user of the shared data between the group, this data is
1677 * freed. Resets the phydev->shared pointer to NULL.
1679 void phy_package_leave(struct phy_device *phydev)
1681 struct phy_package_shared *shared = phydev->shared;
1682 struct mii_bus *bus = phydev->mdio.bus;
1687 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) {
1688 bus->shared[shared->addr] = NULL;
1689 mutex_unlock(&bus->shared_lock);
1690 kfree(shared->priv);
1694 phydev->shared = NULL;
1696 EXPORT_SYMBOL_GPL(phy_package_leave);
1698 static void devm_phy_package_leave(struct device *dev, void *res)
1700 phy_package_leave(*(struct phy_device **)res);
1704 * devm_phy_package_join - resource managed phy_package_join()
1705 * @dev: device that is registering this PHY package
1706 * @phydev: target phy_device struct
1707 * @addr: cookie and PHY address for global register access
1708 * @priv_size: if non-zero allocate this amount of bytes for private data
1710 * Managed phy_package_join(). Shared storage fetched by this function,
1711 * phy_package_leave() is automatically called on driver detach. See
1712 * phy_package_join() for more information.
1714 int devm_phy_package_join(struct device *dev, struct phy_device *phydev,
1715 int addr, size_t priv_size)
1717 struct phy_device **ptr;
1720 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
1725 ret = phy_package_join(phydev, addr, priv_size);
1729 devres_add(dev, ptr);
1736 EXPORT_SYMBOL_GPL(devm_phy_package_join);
1739 * phy_detach - detach a PHY device from its network device
1740 * @phydev: target phy_device struct
1742 * This detaches the phy device from its network device and the phy
1743 * driver, and drops the reference count taken in phy_attach_direct().
1745 void phy_detach(struct phy_device *phydev)
1747 struct net_device *dev = phydev->attached_dev;
1748 struct module *ndev_owner = NULL;
1749 struct mii_bus *bus;
1751 if (phydev->sysfs_links) {
1753 sysfs_remove_link(&dev->dev.kobj, "phydev");
1754 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1757 if (!phydev->attached_dev)
1758 sysfs_remove_file(&phydev->mdio.dev.kobj,
1759 &dev_attr_phy_standalone.attr);
1761 phy_suspend(phydev);
1763 phydev->attached_dev->phydev = NULL;
1764 phydev->attached_dev = NULL;
1766 phydev->phylink = NULL;
1768 phy_led_triggers_unregister(phydev);
1770 if (phydev->mdio.dev.driver)
1771 module_put(phydev->mdio.dev.driver->owner);
1773 /* If the device had no specific driver before (i.e. - it
1774 * was using the generic driver), we unbind the device
1775 * from the generic driver so that there's a chance a
1776 * real driver could be loaded
1778 if (phy_driver_is_genphy(phydev) ||
1779 phy_driver_is_genphy_10g(phydev))
1780 device_release_driver(&phydev->mdio.dev);
1782 /* Assert the reset signal */
1783 phy_device_reset(phydev, 1);
1786 * The phydev might go away on the put_device() below, so avoid
1787 * a use-after-free bug by reading the underlying bus first.
1789 bus = phydev->mdio.bus;
1791 put_device(&phydev->mdio.dev);
1793 ndev_owner = dev->dev.parent->driver->owner;
1794 if (ndev_owner != bus->owner)
1795 module_put(bus->owner);
1797 EXPORT_SYMBOL(phy_detach);
1799 int phy_suspend(struct phy_device *phydev)
1801 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1802 struct net_device *netdev = phydev->attached_dev;
1803 struct phy_driver *phydrv = phydev->drv;
1806 if (phydev->suspended)
1809 /* If the device has WOL enabled, we cannot suspend the PHY */
1810 phy_ethtool_get_wol(phydev, &wol);
1811 if (wol.wolopts || (netdev && netdev->wol_enabled))
1814 if (!phydrv || !phydrv->suspend)
1817 ret = phydrv->suspend(phydev);
1819 phydev->suspended = true;
1823 EXPORT_SYMBOL(phy_suspend);
1825 int __phy_resume(struct phy_device *phydev)
1827 struct phy_driver *phydrv = phydev->drv;
1830 lockdep_assert_held(&phydev->lock);
1832 if (!phydrv || !phydrv->resume)
1835 ret = phydrv->resume(phydev);
1837 phydev->suspended = false;
1841 EXPORT_SYMBOL(__phy_resume);
1843 int phy_resume(struct phy_device *phydev)
1847 mutex_lock(&phydev->lock);
1848 ret = __phy_resume(phydev);
1849 mutex_unlock(&phydev->lock);
1853 EXPORT_SYMBOL(phy_resume);
1855 int phy_loopback(struct phy_device *phydev, bool enable)
1862 mutex_lock(&phydev->lock);
1864 if (enable && phydev->loopback_enabled) {
1869 if (!enable && !phydev->loopback_enabled) {
1874 if (phydev->drv->set_loopback)
1875 ret = phydev->drv->set_loopback(phydev, enable);
1877 ret = genphy_loopback(phydev, enable);
1882 phydev->loopback_enabled = enable;
1885 mutex_unlock(&phydev->lock);
1888 EXPORT_SYMBOL(phy_loopback);
1891 * phy_reset_after_clk_enable - perform a PHY reset if needed
1892 * @phydev: target phy_device struct
1894 * Description: Some PHYs are known to need a reset after their refclk was
1895 * enabled. This function evaluates the flags and perform the reset if it's
1896 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1899 int phy_reset_after_clk_enable(struct phy_device *phydev)
1901 if (!phydev || !phydev->drv)
1904 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1905 phy_device_reset(phydev, 1);
1906 phy_device_reset(phydev, 0);
1912 EXPORT_SYMBOL(phy_reset_after_clk_enable);
1914 /* Generic PHY support and helper functions */
1917 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1918 * @phydev: target phy_device struct
1920 * Description: Writes MII_ADVERTISE with the appropriate values,
1921 * after sanitizing the values to make sure we only advertise
1922 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1923 * hasn't changed, and > 0 if it has changed.
1925 static int genphy_config_advert(struct phy_device *phydev)
1927 int err, bmsr, changed = 0;
1930 /* Only allow advertising what this PHY supports */
1931 linkmode_and(phydev->advertising, phydev->advertising,
1934 adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
1936 /* Setup standard advertisement */
1937 err = phy_modify_changed(phydev, MII_ADVERTISE,
1938 ADVERTISE_ALL | ADVERTISE_100BASE4 |
1939 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
1946 bmsr = phy_read(phydev, MII_BMSR);
1950 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1951 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1954 if (!(bmsr & BMSR_ESTATEN))
1957 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
1959 err = phy_modify_changed(phydev, MII_CTRL1000,
1960 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
1971 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
1972 * @phydev: target phy_device struct
1974 * Description: Writes MII_ADVERTISE with the appropriate values,
1975 * after sanitizing the values to make sure we only advertise
1976 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1977 * hasn't changed, and > 0 if it has changed. This function is intended
1978 * for Clause 37 1000Base-X mode.
1980 static int genphy_c37_config_advert(struct phy_device *phydev)
1984 /* Only allow advertising what this PHY supports */
1985 linkmode_and(phydev->advertising, phydev->advertising,
1988 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
1989 phydev->advertising))
1990 adv |= ADVERTISE_1000XFULL;
1991 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
1992 phydev->advertising))
1993 adv |= ADVERTISE_1000XPAUSE;
1994 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
1995 phydev->advertising))
1996 adv |= ADVERTISE_1000XPSE_ASYM;
1998 return phy_modify_changed(phydev, MII_ADVERTISE,
1999 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
2000 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
2005 * genphy_config_eee_advert - disable unwanted eee mode advertisement
2006 * @phydev: target phy_device struct
2008 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
2009 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
2010 * changed, and 1 if it has changed.
2012 int genphy_config_eee_advert(struct phy_device *phydev)
2016 /* Nothing to disable */
2017 if (!phydev->eee_broken_modes)
2020 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
2021 phydev->eee_broken_modes, 0);
2022 /* If the call failed, we assume that EEE is not supported */
2023 return err < 0 ? 0 : err;
2025 EXPORT_SYMBOL(genphy_config_eee_advert);
2028 * genphy_setup_forced - configures/forces speed/duplex from @phydev
2029 * @phydev: target phy_device struct
2031 * Description: Configures MII_BMCR to force speed/duplex
2032 * to the values in phydev. Assumes that the values are valid.
2033 * Please see phy_sanitize_settings().
2035 int genphy_setup_forced(struct phy_device *phydev)
2040 phydev->asym_pause = 0;
2042 ctl = mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2044 return phy_modify(phydev, MII_BMCR,
2045 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
2047 EXPORT_SYMBOL(genphy_setup_forced);
2049 static int genphy_setup_master_slave(struct phy_device *phydev)
2053 if (!phydev->is_gigabit_capable)
2056 switch (phydev->master_slave_set) {
2057 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
2058 ctl |= CTL1000_PREFER_MASTER;
2060 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
2062 case MASTER_SLAVE_CFG_MASTER_FORCE:
2063 ctl |= CTL1000_AS_MASTER;
2065 case MASTER_SLAVE_CFG_SLAVE_FORCE:
2066 ctl |= CTL1000_ENABLE_MASTER;
2068 case MASTER_SLAVE_CFG_UNKNOWN:
2069 case MASTER_SLAVE_CFG_UNSUPPORTED:
2072 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
2076 return phy_modify_changed(phydev, MII_CTRL1000,
2077 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER |
2078 CTL1000_PREFER_MASTER), ctl);
2081 int genphy_read_master_slave(struct phy_device *phydev)
2086 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
2087 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
2089 val = phy_read(phydev, MII_CTRL1000);
2093 if (val & CTL1000_ENABLE_MASTER) {
2094 if (val & CTL1000_AS_MASTER)
2095 cfg = MASTER_SLAVE_CFG_MASTER_FORCE;
2097 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE;
2099 if (val & CTL1000_PREFER_MASTER)
2100 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED;
2102 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
2105 val = phy_read(phydev, MII_STAT1000);
2109 if (val & LPA_1000MSFAIL) {
2110 state = MASTER_SLAVE_STATE_ERR;
2111 } else if (phydev->link) {
2112 /* this bits are valid only for active link */
2113 if (val & LPA_1000MSRES)
2114 state = MASTER_SLAVE_STATE_MASTER;
2116 state = MASTER_SLAVE_STATE_SLAVE;
2118 state = MASTER_SLAVE_STATE_UNKNOWN;
2121 phydev->master_slave_get = cfg;
2122 phydev->master_slave_state = state;
2126 EXPORT_SYMBOL(genphy_read_master_slave);
2129 * genphy_restart_aneg - Enable and Restart Autonegotiation
2130 * @phydev: target phy_device struct
2132 int genphy_restart_aneg(struct phy_device *phydev)
2134 /* Don't isolate the PHY if we're negotiating */
2135 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
2136 BMCR_ANENABLE | BMCR_ANRESTART);
2138 EXPORT_SYMBOL(genphy_restart_aneg);
2141 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
2142 * @phydev: target phy_device struct
2143 * @restart: whether aneg restart is requested
2145 * Check, and restart auto-negotiation if needed.
2147 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
2152 /* Advertisement hasn't changed, but maybe aneg was never on to
2153 * begin with? Or maybe phy was isolated?
2155 ret = phy_read(phydev, MII_BMCR);
2159 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
2164 return genphy_restart_aneg(phydev);
2168 EXPORT_SYMBOL(genphy_check_and_restart_aneg);
2171 * __genphy_config_aneg - restart auto-negotiation or write BMCR
2172 * @phydev: target phy_device struct
2173 * @changed: whether autoneg is requested
2175 * Description: If auto-negotiation is enabled, we configure the
2176 * advertising, and then restart auto-negotiation. If it is not
2177 * enabled, then we write the BMCR.
2179 int __genphy_config_aneg(struct phy_device *phydev, bool changed)
2183 if (genphy_config_eee_advert(phydev))
2186 err = genphy_setup_master_slave(phydev);
2192 if (AUTONEG_ENABLE != phydev->autoneg)
2193 return genphy_setup_forced(phydev);
2195 err = genphy_config_advert(phydev);
2196 if (err < 0) /* error */
2201 return genphy_check_and_restart_aneg(phydev, changed);
2203 EXPORT_SYMBOL(__genphy_config_aneg);
2206 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
2207 * @phydev: target phy_device struct
2209 * Description: If auto-negotiation is enabled, we configure the
2210 * advertising, and then restart auto-negotiation. If it is not
2211 * enabled, then we write the BMCR. This function is intended
2212 * for use with Clause 37 1000Base-X mode.
2214 int genphy_c37_config_aneg(struct phy_device *phydev)
2218 if (phydev->autoneg != AUTONEG_ENABLE)
2219 return genphy_setup_forced(phydev);
2221 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
2226 changed = genphy_c37_config_advert(phydev);
2227 if (changed < 0) /* error */
2231 /* Advertisement hasn't changed, but maybe aneg was never on to
2232 * begin with? Or maybe phy was isolated?
2234 int ctl = phy_read(phydev, MII_BMCR);
2239 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
2240 changed = 1; /* do restart aneg */
2243 /* Only restart aneg if we are advertising something different
2244 * than we were before.
2247 return genphy_restart_aneg(phydev);
2251 EXPORT_SYMBOL(genphy_c37_config_aneg);
2254 * genphy_aneg_done - return auto-negotiation status
2255 * @phydev: target phy_device struct
2257 * Description: Reads the status register and returns 0 either if
2258 * auto-negotiation is incomplete, or if there was an error.
2259 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
2261 int genphy_aneg_done(struct phy_device *phydev)
2263 int retval = phy_read(phydev, MII_BMSR);
2265 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
2267 EXPORT_SYMBOL(genphy_aneg_done);
2270 * genphy_update_link - update link status in @phydev
2271 * @phydev: target phy_device struct
2273 * Description: Update the value in phydev->link to reflect the
2274 * current link value. In order to do this, we need to read
2275 * the status register twice, keeping the second value.
2277 int genphy_update_link(struct phy_device *phydev)
2279 int status = 0, bmcr;
2281 bmcr = phy_read(phydev, MII_BMCR);
2285 /* Autoneg is being started, therefore disregard BMSR value and
2286 * report link as down.
2288 if (bmcr & BMCR_ANRESTART)
2291 /* The link state is latched low so that momentary link
2292 * drops can be detected. Do not double-read the status
2293 * in polling mode to detect such short link drops except
2294 * the link was already down.
2296 if (!phy_polling_mode(phydev) || !phydev->link) {
2297 status = phy_read(phydev, MII_BMSR);
2300 else if (status & BMSR_LSTATUS)
2304 /* Read link and autonegotiation status */
2305 status = phy_read(phydev, MII_BMSR);
2309 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
2310 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
2312 /* Consider the case that autoneg was started and "aneg complete"
2313 * bit has been reset, but "link up" bit not yet.
2315 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
2320 EXPORT_SYMBOL(genphy_update_link);
2322 int genphy_read_lpa(struct phy_device *phydev)
2326 if (phydev->autoneg == AUTONEG_ENABLE) {
2327 if (!phydev->autoneg_complete) {
2328 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2330 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
2334 if (phydev->is_gigabit_capable) {
2335 lpagb = phy_read(phydev, MII_STAT1000);
2339 if (lpagb & LPA_1000MSFAIL) {
2340 int adv = phy_read(phydev, MII_CTRL1000);
2345 if (adv & CTL1000_ENABLE_MASTER)
2346 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
2348 phydev_err(phydev, "Master/Slave resolution failed\n");
2352 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2356 lpa = phy_read(phydev, MII_LPA);
2360 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
2362 linkmode_zero(phydev->lp_advertising);
2367 EXPORT_SYMBOL(genphy_read_lpa);
2370 * genphy_read_status_fixed - read the link parameters for !aneg mode
2371 * @phydev: target phy_device struct
2373 * Read the current duplex and speed state for a PHY operating with
2374 * autonegotiation disabled.
2376 int genphy_read_status_fixed(struct phy_device *phydev)
2378 int bmcr = phy_read(phydev, MII_BMCR);
2383 if (bmcr & BMCR_FULLDPLX)
2384 phydev->duplex = DUPLEX_FULL;
2386 phydev->duplex = DUPLEX_HALF;
2388 if (bmcr & BMCR_SPEED1000)
2389 phydev->speed = SPEED_1000;
2390 else if (bmcr & BMCR_SPEED100)
2391 phydev->speed = SPEED_100;
2393 phydev->speed = SPEED_10;
2397 EXPORT_SYMBOL(genphy_read_status_fixed);
2400 * genphy_read_status - check the link status and update current link state
2401 * @phydev: target phy_device struct
2403 * Description: Check the link, then figure out the current state
2404 * by comparing what we advertise with what the link partner
2405 * advertises. Start by checking the gigabit possibilities,
2406 * then move on to 10/100.
2408 int genphy_read_status(struct phy_device *phydev)
2410 int err, old_link = phydev->link;
2412 /* Update the link, but return if there was an error */
2413 err = genphy_update_link(phydev);
2417 /* why bother the PHY if nothing can have changed */
2418 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2421 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
2422 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
2423 phydev->speed = SPEED_UNKNOWN;
2424 phydev->duplex = DUPLEX_UNKNOWN;
2426 phydev->asym_pause = 0;
2428 if (phydev->is_gigabit_capable) {
2429 err = genphy_read_master_slave(phydev);
2434 err = genphy_read_lpa(phydev);
2438 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2439 phy_resolve_aneg_linkmode(phydev);
2440 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2441 err = genphy_read_status_fixed(phydev);
2448 EXPORT_SYMBOL(genphy_read_status);
2451 * genphy_c37_read_status - check the link status and update current link state
2452 * @phydev: target phy_device struct
2454 * Description: Check the link, then figure out the current state
2455 * by comparing what we advertise with what the link partner
2456 * advertises. This function is for Clause 37 1000Base-X mode.
2458 int genphy_c37_read_status(struct phy_device *phydev)
2460 int lpa, err, old_link = phydev->link;
2462 /* Update the link, but return if there was an error */
2463 err = genphy_update_link(phydev);
2467 /* why bother the PHY if nothing can have changed */
2468 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2471 phydev->duplex = DUPLEX_UNKNOWN;
2473 phydev->asym_pause = 0;
2475 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2476 lpa = phy_read(phydev, MII_LPA);
2480 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2481 phydev->lp_advertising, lpa & LPA_LPACK);
2482 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2483 phydev->lp_advertising, lpa & LPA_1000XFULL);
2484 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2485 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2486 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2487 phydev->lp_advertising,
2488 lpa & LPA_1000XPAUSE_ASYM);
2490 phy_resolve_aneg_linkmode(phydev);
2491 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2492 int bmcr = phy_read(phydev, MII_BMCR);
2497 if (bmcr & BMCR_FULLDPLX)
2498 phydev->duplex = DUPLEX_FULL;
2500 phydev->duplex = DUPLEX_HALF;
2505 EXPORT_SYMBOL(genphy_c37_read_status);
2508 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2509 * @phydev: target phy_device struct
2511 * Description: Perform a software PHY reset using the standard
2512 * BMCR_RESET bit and poll for the reset bit to be cleared.
2514 * Returns: 0 on success, < 0 on failure
2516 int genphy_soft_reset(struct phy_device *phydev)
2518 u16 res = BMCR_RESET;
2521 if (phydev->autoneg == AUTONEG_ENABLE)
2522 res |= BMCR_ANRESTART;
2524 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2528 /* Clause 22 states that setting bit BMCR_RESET sets control registers
2529 * to their default value. Therefore the POWER DOWN bit is supposed to
2530 * be cleared after soft reset.
2532 phydev->suspended = 0;
2534 ret = phy_poll_reset(phydev);
2538 /* BMCR may be reset to defaults */
2539 if (phydev->autoneg == AUTONEG_DISABLE)
2540 ret = genphy_setup_forced(phydev);
2544 EXPORT_SYMBOL(genphy_soft_reset);
2546 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev)
2548 /* It seems there are cases where the interrupts are handled by another
2549 * entity (ie an IRQ controller embedded inside the PHY) and do not
2550 * need any other interraction from phylib. In this case, just trigger
2551 * the state machine directly.
2553 phy_trigger_machine(phydev);
2557 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack);
2560 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2561 * @phydev: target phy_device struct
2563 * Description: Reads the PHY's abilities and populates
2564 * phydev->supported accordingly.
2566 * Returns: 0 on success, < 0 on failure
2568 int genphy_read_abilities(struct phy_device *phydev)
2572 linkmode_set_bit_array(phy_basic_ports_array,
2573 ARRAY_SIZE(phy_basic_ports_array),
2576 val = phy_read(phydev, MII_BMSR);
2580 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2581 val & BMSR_ANEGCAPABLE);
2583 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2584 val & BMSR_100FULL);
2585 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2586 val & BMSR_100HALF);
2587 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2589 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2592 if (val & BMSR_ESTATEN) {
2593 val = phy_read(phydev, MII_ESTATUS);
2597 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2598 phydev->supported, val & ESTATUS_1000_TFULL);
2599 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2600 phydev->supported, val & ESTATUS_1000_THALF);
2601 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2602 phydev->supported, val & ESTATUS_1000_XFULL);
2607 EXPORT_SYMBOL(genphy_read_abilities);
2609 /* This is used for the phy device which doesn't support the MMD extended
2610 * register access, but it does have side effect when we are trying to access
2611 * the MMD register via indirect method.
2613 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2617 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2619 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2620 u16 regnum, u16 val)
2624 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2626 int genphy_suspend(struct phy_device *phydev)
2628 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2630 EXPORT_SYMBOL(genphy_suspend);
2632 int genphy_resume(struct phy_device *phydev)
2634 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2636 EXPORT_SYMBOL(genphy_resume);
2638 int genphy_loopback(struct phy_device *phydev, bool enable)
2641 u16 val, ctl = BMCR_LOOPBACK;
2644 ctl |= mii_bmcr_encode_fixed(phydev->speed, phydev->duplex);
2646 phy_modify(phydev, MII_BMCR, ~0, ctl);
2648 ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
2650 5000, 500000, true);
2654 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
2656 phy_config_aneg(phydev);
2661 EXPORT_SYMBOL(genphy_loopback);
2664 * phy_remove_link_mode - Remove a supported link mode
2665 * @phydev: phy_device structure to remove link mode from
2666 * @link_mode: Link mode to be removed
2668 * Description: Some MACs don't support all link modes which the PHY
2669 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2670 * to remove a link mode.
2672 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2674 linkmode_clear_bit(link_mode, phydev->supported);
2675 phy_advertise_supported(phydev);
2677 EXPORT_SYMBOL(phy_remove_link_mode);
2679 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2681 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2682 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2683 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2684 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2688 * phy_advertise_supported - Advertise all supported modes
2689 * @phydev: target phy_device struct
2691 * Description: Called to advertise all supported modes, doesn't touch
2692 * pause mode advertising.
2694 void phy_advertise_supported(struct phy_device *phydev)
2696 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2698 linkmode_copy(new, phydev->supported);
2699 phy_copy_pause_bits(new, phydev->advertising);
2700 linkmode_copy(phydev->advertising, new);
2702 EXPORT_SYMBOL(phy_advertise_supported);
2705 * phy_support_sym_pause - Enable support of symmetrical pause
2706 * @phydev: target phy_device struct
2708 * Description: Called by the MAC to indicate is supports symmetrical
2709 * Pause, but not asym pause.
2711 void phy_support_sym_pause(struct phy_device *phydev)
2713 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
2714 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2716 EXPORT_SYMBOL(phy_support_sym_pause);
2719 * phy_support_asym_pause - Enable support of asym pause
2720 * @phydev: target phy_device struct
2722 * Description: Called by the MAC to indicate is supports Asym Pause.
2724 void phy_support_asym_pause(struct phy_device *phydev)
2726 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2728 EXPORT_SYMBOL(phy_support_asym_pause);
2731 * phy_set_sym_pause - Configure symmetric Pause
2732 * @phydev: target phy_device struct
2733 * @rx: Receiver Pause is supported
2734 * @tx: Transmit Pause is supported
2735 * @autoneg: Auto neg should be used
2737 * Description: Configure advertised Pause support depending on if
2738 * receiver pause and pause auto neg is supported. Generally called
2739 * from the set_pauseparam .ndo.
2741 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
2744 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
2746 if (rx && tx && autoneg)
2747 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2750 linkmode_copy(phydev->advertising, phydev->supported);
2752 EXPORT_SYMBOL(phy_set_sym_pause);
2755 * phy_set_asym_pause - Configure Pause and Asym Pause
2756 * @phydev: target phy_device struct
2757 * @rx: Receiver Pause is supported
2758 * @tx: Transmit Pause is supported
2760 * Description: Configure advertised Pause support depending on if
2761 * transmit and receiver pause is supported. If there has been a
2762 * change in adverting, trigger a new autoneg. Generally called from
2763 * the set_pauseparam .ndo.
2765 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
2767 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
2769 linkmode_copy(oldadv, phydev->advertising);
2770 linkmode_set_pause(phydev->advertising, tx, rx);
2772 if (!linkmode_equal(oldadv, phydev->advertising) &&
2774 phy_start_aneg(phydev);
2776 EXPORT_SYMBOL(phy_set_asym_pause);
2779 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
2780 * @phydev: phy_device struct
2781 * @pp: requested pause configuration
2783 * Description: Test if the PHY/MAC combination supports the Pause
2784 * configuration the user is requesting. Returns True if it is
2785 * supported, false otherwise.
2787 bool phy_validate_pause(struct phy_device *phydev,
2788 struct ethtool_pauseparam *pp)
2790 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2791 phydev->supported) && pp->rx_pause)
2794 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2795 phydev->supported) &&
2796 pp->rx_pause != pp->tx_pause)
2801 EXPORT_SYMBOL(phy_validate_pause);
2804 * phy_get_pause - resolve negotiated pause modes
2805 * @phydev: phy_device struct
2806 * @tx_pause: pointer to bool to indicate whether transmit pause should be
2808 * @rx_pause: pointer to bool to indicate whether receive pause should be
2811 * Resolve and return the flow control modes according to the negotiation
2812 * result. This includes checking that we are operating in full duplex mode.
2813 * See linkmode_resolve_pause() for further details.
2815 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
2817 if (phydev->duplex != DUPLEX_FULL) {
2823 return linkmode_resolve_pause(phydev->advertising,
2824 phydev->lp_advertising,
2825 tx_pause, rx_pause);
2827 EXPORT_SYMBOL(phy_get_pause);
2829 #if IS_ENABLED(CONFIG_OF_MDIO)
2830 static int phy_get_int_delay_property(struct device *dev, const char *name)
2835 ret = device_property_read_u32(dev, name, &int_delay);
2842 static int phy_get_int_delay_property(struct device *dev, const char *name)
2849 * phy_get_internal_delay - returns the index of the internal delay
2850 * @phydev: phy_device struct
2851 * @dev: pointer to the devices device struct
2852 * @delay_values: array of delays the PHY supports
2853 * @size: the size of the delay array
2854 * @is_rx: boolean to indicate to get the rx internal delay
2856 * Returns the index within the array of internal delay passed in.
2857 * If the device property is not present then the interface type is checked
2858 * if the interface defines use of internal delay then a 1 is returned otherwise
2860 * The array must be in ascending order. If PHY does not have an ascending order
2861 * array then size = 0 and the value of the delay property is returned.
2862 * Return -EINVAL if the delay is invalid or cannot be found.
2864 s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
2865 const int *delay_values, int size, bool is_rx)
2871 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
2872 if (delay < 0 && size == 0) {
2873 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2874 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
2881 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
2882 if (delay < 0 && size == 0) {
2883 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2884 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
2894 if (delay && size == 0)
2897 if (delay < delay_values[0] || delay > delay_values[size - 1]) {
2898 phydev_err(phydev, "Delay %d is out of range\n", delay);
2902 if (delay == delay_values[0])
2905 for (i = 1; i < size; i++) {
2906 if (delay == delay_values[i])
2909 /* Find an approximate index by looking up the table */
2910 if (delay > delay_values[i - 1] &&
2911 delay < delay_values[i]) {
2912 if (delay - delay_values[i - 1] <
2913 delay_values[i] - delay)
2920 phydev_err(phydev, "error finding internal delay index for %d\n",
2925 EXPORT_SYMBOL(phy_get_internal_delay);
2927 static bool phy_drv_supports_irq(struct phy_driver *phydrv)
2929 return phydrv->config_intr && phydrv->handle_interrupt;
2933 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device
2934 * @fwnode: pointer to the mdio_device's fwnode
2936 * If successful, returns a pointer to the mdio_device with the embedded
2937 * struct device refcount incremented by one, or NULL on failure.
2938 * The caller should call put_device() on the mdio_device after its use.
2940 struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
2947 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode);
2951 return to_mdio_device(d);
2953 EXPORT_SYMBOL(fwnode_mdio_find_device);
2956 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.
2958 * @phy_fwnode: Pointer to the phy's fwnode.
2960 * If successful, returns a pointer to the phy_device with the embedded
2961 * struct device refcount incremented by one, or NULL on failure.
2963 struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
2965 struct mdio_device *mdiodev;
2967 mdiodev = fwnode_mdio_find_device(phy_fwnode);
2971 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
2972 return to_phy_device(&mdiodev->dev);
2974 put_device(&mdiodev->dev);
2978 EXPORT_SYMBOL(fwnode_phy_find_device);
2981 * device_phy_find_device - For the given device, get the phy_device
2982 * @dev: Pointer to the given device
2984 * Refer return conditions of fwnode_phy_find_device().
2986 struct phy_device *device_phy_find_device(struct device *dev)
2988 return fwnode_phy_find_device(dev_fwnode(dev));
2990 EXPORT_SYMBOL_GPL(device_phy_find_device);
2993 * fwnode_get_phy_node - Get the phy_node using the named reference.
2994 * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
2996 * Refer return conditions of fwnode_find_reference().
2997 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"
2998 * and "phy-device" are not supported in ACPI. DT supports all the three
2999 * named references to the phy node.
3001 struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
3003 struct fwnode_handle *phy_node;
3005 /* Only phy-handle is used for ACPI */
3006 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
3007 if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
3009 phy_node = fwnode_find_reference(fwnode, "phy", 0);
3010 if (IS_ERR(phy_node))
3011 phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
3014 EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
3017 * phy_probe - probe and init a PHY device
3018 * @dev: device to probe and init
3020 * Description: Take care of setting up the phy_device structure,
3021 * set the state to READY (the driver's init function should
3022 * set it to STARTING if needed).
3024 static int phy_probe(struct device *dev)
3026 struct phy_device *phydev = to_phy_device(dev);
3027 struct device_driver *drv = phydev->mdio.dev.driver;
3028 struct phy_driver *phydrv = to_phy_driver(drv);
3031 phydev->drv = phydrv;
3033 /* Disable the interrupt if the PHY doesn't support it
3034 * but the interrupt is still a valid one
3036 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
3037 phydev->irq = PHY_POLL;
3039 if (phydrv->flags & PHY_IS_INTERNAL)
3040 phydev->is_internal = true;
3042 mutex_lock(&phydev->lock);
3044 /* Deassert the reset signal */
3045 phy_device_reset(phydev, 0);
3047 if (phydev->drv->probe) {
3048 err = phydev->drv->probe(phydev);
3053 /* Start out supporting everything. Eventually,
3054 * a controller will attach, and may modify one
3055 * or both of these values
3057 if (phydrv->features)
3058 linkmode_copy(phydev->supported, phydrv->features);
3059 else if (phydrv->get_features)
3060 err = phydrv->get_features(phydev);
3061 else if (phydev->is_c45)
3062 err = genphy_c45_pma_read_abilities(phydev);
3064 err = genphy_read_abilities(phydev);
3069 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
3071 phydev->autoneg = 0;
3073 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
3075 phydev->is_gigabit_capable = 1;
3076 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
3078 phydev->is_gigabit_capable = 1;
3080 of_set_phy_supported(phydev);
3081 phy_advertise_supported(phydev);
3083 /* Get the EEE modes we want to prohibit. We will ask
3084 * the PHY stop advertising these mode later on
3086 of_set_phy_eee_broken(phydev);
3088 /* The Pause Frame bits indicate that the PHY can support passing
3089 * pause frames. During autonegotiation, the PHYs will determine if
3090 * they should allow pause frames to pass. The MAC driver should then
3091 * use that result to determine whether to enable flow control via
3094 * Normally, PHY drivers should not set the Pause bits, and instead
3095 * allow phylib to do that. However, there may be some situations
3096 * (e.g. hardware erratum) where the driver wants to set only one
3099 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
3100 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
3101 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3103 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3107 /* Set the state to READY by default */
3108 phydev->state = PHY_READY;
3111 /* Assert the reset signal */
3113 phy_device_reset(phydev, 1);
3115 mutex_unlock(&phydev->lock);
3120 static int phy_remove(struct device *dev)
3122 struct phy_device *phydev = to_phy_device(dev);
3124 cancel_delayed_work_sync(&phydev->state_queue);
3126 mutex_lock(&phydev->lock);
3127 phydev->state = PHY_DOWN;
3128 mutex_unlock(&phydev->lock);
3130 sfp_bus_del_upstream(phydev->sfp_bus);
3131 phydev->sfp_bus = NULL;
3133 if (phydev->drv && phydev->drv->remove)
3134 phydev->drv->remove(phydev);
3136 /* Assert the reset signal */
3137 phy_device_reset(phydev, 1);
3144 static void phy_shutdown(struct device *dev)
3146 struct phy_device *phydev = to_phy_device(dev);
3148 if (phydev->state == PHY_READY || !phydev->attached_dev)
3151 phy_disable_interrupts(phydev);
3155 * phy_driver_register - register a phy_driver with the PHY layer
3156 * @new_driver: new phy_driver to register
3157 * @owner: module owning this PHY
3159 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
3163 /* Either the features are hard coded, or dynamically
3164 * determined. It cannot be both.
3166 if (WARN_ON(new_driver->features && new_driver->get_features)) {
3167 pr_err("%s: features and get_features must not both be set\n",
3172 /* PHYLIB device drivers must not match using a DT compatible table
3173 * as this bypasses our checks that the mdiodev that is being matched
3174 * is backed by a struct phy_device. If such a case happens, we will
3175 * make out-of-bounds accesses and lockup in phydev->lock.
3177 if (WARN(new_driver->mdiodrv.driver.of_match_table,
3178 "%s: driver must not provide a DT match table\n",
3182 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
3183 new_driver->mdiodrv.driver.name = new_driver->name;
3184 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
3185 new_driver->mdiodrv.driver.probe = phy_probe;
3186 new_driver->mdiodrv.driver.remove = phy_remove;
3187 new_driver->mdiodrv.driver.shutdown = phy_shutdown;
3188 new_driver->mdiodrv.driver.owner = owner;
3189 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
3191 retval = driver_register(&new_driver->mdiodrv.driver);
3193 pr_err("%s: Error %d in registering driver\n",
3194 new_driver->name, retval);
3199 pr_debug("%s: Registered new driver\n", new_driver->name);
3203 EXPORT_SYMBOL(phy_driver_register);
3205 int phy_drivers_register(struct phy_driver *new_driver, int n,
3206 struct module *owner)
3210 for (i = 0; i < n; i++) {
3211 ret = phy_driver_register(new_driver + i, owner);
3214 phy_driver_unregister(new_driver + i);
3220 EXPORT_SYMBOL(phy_drivers_register);
3222 void phy_driver_unregister(struct phy_driver *drv)
3224 driver_unregister(&drv->mdiodrv.driver);
3226 EXPORT_SYMBOL(phy_driver_unregister);
3228 void phy_drivers_unregister(struct phy_driver *drv, int n)
3232 for (i = 0; i < n; i++)
3233 phy_driver_unregister(drv + i);
3235 EXPORT_SYMBOL(phy_drivers_unregister);
3237 static struct phy_driver genphy_driver = {
3238 .phy_id = 0xffffffff,
3239 .phy_id_mask = 0xffffffff,
3240 .name = "Generic PHY",
3241 .get_features = genphy_read_abilities,
3242 .suspend = genphy_suspend,
3243 .resume = genphy_resume,
3244 .set_loopback = genphy_loopback,
3247 static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
3248 .get_sset_count = phy_ethtool_get_sset_count,
3249 .get_strings = phy_ethtool_get_strings,
3250 .get_stats = phy_ethtool_get_stats,
3251 .start_cable_test = phy_start_cable_test,
3252 .start_cable_test_tdr = phy_start_cable_test_tdr,
3255 static int __init phy_init(void)
3259 rc = mdio_bus_init();
3263 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
3266 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
3270 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
3272 phy_driver_unregister(&genphy_c45_driver);
3280 static void __exit phy_exit(void)
3282 phy_driver_unregister(&genphy_c45_driver);
3283 phy_driver_unregister(&genphy_driver);
3285 ethtool_set_ethtool_phy_ops(NULL);
3288 subsys_initcall(phy_init);
3289 module_exit(phy_exit);