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/property.h>
30 #include <linux/sfp.h>
31 #include <linux/skbuff.h>
32 #include <linux/slab.h>
33 #include <linux/string.h>
34 #include <linux/uaccess.h>
35 #include <linux/unistd.h>
37 MODULE_DESCRIPTION("PHY library");
38 MODULE_AUTHOR("Andy Fleming");
39 MODULE_LICENSE("GPL");
41 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
42 EXPORT_SYMBOL_GPL(phy_basic_features);
44 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
45 EXPORT_SYMBOL_GPL(phy_basic_t1_features);
47 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
48 EXPORT_SYMBOL_GPL(phy_gbit_features);
50 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
51 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
53 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
54 EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
56 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
57 EXPORT_SYMBOL_GPL(phy_10gbit_features);
59 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
60 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
62 const int phy_basic_ports_array[3] = {
63 ETHTOOL_LINK_MODE_Autoneg_BIT,
64 ETHTOOL_LINK_MODE_TP_BIT,
65 ETHTOOL_LINK_MODE_MII_BIT,
67 EXPORT_SYMBOL_GPL(phy_basic_ports_array);
69 const int phy_fibre_port_array[1] = {
70 ETHTOOL_LINK_MODE_FIBRE_BIT,
72 EXPORT_SYMBOL_GPL(phy_fibre_port_array);
74 const int phy_all_ports_features_array[7] = {
75 ETHTOOL_LINK_MODE_Autoneg_BIT,
76 ETHTOOL_LINK_MODE_TP_BIT,
77 ETHTOOL_LINK_MODE_MII_BIT,
78 ETHTOOL_LINK_MODE_FIBRE_BIT,
79 ETHTOOL_LINK_MODE_AUI_BIT,
80 ETHTOOL_LINK_MODE_BNC_BIT,
81 ETHTOOL_LINK_MODE_Backplane_BIT,
83 EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
85 const int phy_10_100_features_array[4] = {
86 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
87 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
88 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
89 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
91 EXPORT_SYMBOL_GPL(phy_10_100_features_array);
93 const int phy_basic_t1_features_array[2] = {
94 ETHTOOL_LINK_MODE_TP_BIT,
95 ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
97 EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
99 const int phy_gbit_features_array[2] = {
100 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
101 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
103 EXPORT_SYMBOL_GPL(phy_gbit_features_array);
105 const int phy_10gbit_features_array[1] = {
106 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
108 EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
110 static const int phy_10gbit_fec_features_array[1] = {
111 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
114 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
115 EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
117 static const int phy_10gbit_full_features_array[] = {
118 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
119 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
120 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
121 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
124 static void features_init(void)
126 /* 10/100 half/full*/
127 linkmode_set_bit_array(phy_basic_ports_array,
128 ARRAY_SIZE(phy_basic_ports_array),
130 linkmode_set_bit_array(phy_10_100_features_array,
131 ARRAY_SIZE(phy_10_100_features_array),
135 linkmode_set_bit_array(phy_basic_t1_features_array,
136 ARRAY_SIZE(phy_basic_t1_features_array),
137 phy_basic_t1_features);
139 /* 10/100 half/full + 1000 half/full */
140 linkmode_set_bit_array(phy_basic_ports_array,
141 ARRAY_SIZE(phy_basic_ports_array),
143 linkmode_set_bit_array(phy_10_100_features_array,
144 ARRAY_SIZE(phy_10_100_features_array),
146 linkmode_set_bit_array(phy_gbit_features_array,
147 ARRAY_SIZE(phy_gbit_features_array),
150 /* 10/100 half/full + 1000 half/full + fibre*/
151 linkmode_set_bit_array(phy_basic_ports_array,
152 ARRAY_SIZE(phy_basic_ports_array),
153 phy_gbit_fibre_features);
154 linkmode_set_bit_array(phy_10_100_features_array,
155 ARRAY_SIZE(phy_10_100_features_array),
156 phy_gbit_fibre_features);
157 linkmode_set_bit_array(phy_gbit_features_array,
158 ARRAY_SIZE(phy_gbit_features_array),
159 phy_gbit_fibre_features);
160 linkmode_set_bit_array(phy_fibre_port_array,
161 ARRAY_SIZE(phy_fibre_port_array),
162 phy_gbit_fibre_features);
164 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
165 linkmode_set_bit_array(phy_all_ports_features_array,
166 ARRAY_SIZE(phy_all_ports_features_array),
167 phy_gbit_all_ports_features);
168 linkmode_set_bit_array(phy_10_100_features_array,
169 ARRAY_SIZE(phy_10_100_features_array),
170 phy_gbit_all_ports_features);
171 linkmode_set_bit_array(phy_gbit_features_array,
172 ARRAY_SIZE(phy_gbit_features_array),
173 phy_gbit_all_ports_features);
175 /* 10/100 half/full + 1000 half/full + 10G full*/
176 linkmode_set_bit_array(phy_all_ports_features_array,
177 ARRAY_SIZE(phy_all_ports_features_array),
178 phy_10gbit_features);
179 linkmode_set_bit_array(phy_10_100_features_array,
180 ARRAY_SIZE(phy_10_100_features_array),
181 phy_10gbit_features);
182 linkmode_set_bit_array(phy_gbit_features_array,
183 ARRAY_SIZE(phy_gbit_features_array),
184 phy_10gbit_features);
185 linkmode_set_bit_array(phy_10gbit_features_array,
186 ARRAY_SIZE(phy_10gbit_features_array),
187 phy_10gbit_features);
189 /* 10/100/1000/10G full */
190 linkmode_set_bit_array(phy_all_ports_features_array,
191 ARRAY_SIZE(phy_all_ports_features_array),
192 phy_10gbit_full_features);
193 linkmode_set_bit_array(phy_10gbit_full_features_array,
194 ARRAY_SIZE(phy_10gbit_full_features_array),
195 phy_10gbit_full_features);
197 linkmode_set_bit_array(phy_10gbit_fec_features_array,
198 ARRAY_SIZE(phy_10gbit_fec_features_array),
199 phy_10gbit_fec_features);
202 void phy_device_free(struct phy_device *phydev)
204 put_device(&phydev->mdio.dev);
206 EXPORT_SYMBOL(phy_device_free);
208 static void phy_mdio_device_free(struct mdio_device *mdiodev)
210 struct phy_device *phydev;
212 phydev = container_of(mdiodev, struct phy_device, mdio);
213 phy_device_free(phydev);
216 static void phy_device_release(struct device *dev)
218 kfree(to_phy_device(dev));
221 static void phy_mdio_device_remove(struct mdio_device *mdiodev)
223 struct phy_device *phydev;
225 phydev = container_of(mdiodev, struct phy_device, mdio);
226 phy_device_remove(phydev);
229 static struct phy_driver genphy_driver;
231 static LIST_HEAD(phy_fixup_list);
232 static DEFINE_MUTEX(phy_fixup_lock);
234 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
236 struct device_driver *drv = phydev->mdio.dev.driver;
237 struct phy_driver *phydrv = to_phy_driver(drv);
238 struct net_device *netdev = phydev->attached_dev;
240 if (!drv || !phydrv->suspend)
243 /* PHY not attached? May suspend if the PHY has not already been
244 * suspended as part of a prior call to phy_disconnect() ->
245 * phy_detach() -> phy_suspend() because the parent netdev might be the
246 * MDIO bus driver and clock gated at this point.
251 if (netdev->wol_enabled)
254 /* As long as not all affected network drivers support the
255 * wol_enabled flag, let's check for hints that WoL is enabled.
256 * Don't suspend PHY if the attached netdev parent may wake up.
257 * The parent may point to a PCI device, as in tg3 driver.
259 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
262 /* Also don't suspend PHY if the netdev itself may wakeup. This
263 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
266 if (device_may_wakeup(&netdev->dev))
270 return !phydev->suspended;
273 static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
275 struct phy_device *phydev = to_phy_device(dev);
277 if (phydev->mac_managed_pm)
280 /* Wakeup interrupts may occur during the system sleep transition when
281 * the PHY is inaccessible. Set flag to postpone handling until the PHY
282 * has resumed. Wait for concurrent interrupt handler to complete.
284 if (phy_interrupt_is_valid(phydev)) {
285 phydev->irq_suspended = 1;
286 synchronize_irq(phydev->irq);
289 /* We must stop the state machine manually, otherwise it stops out of
290 * control, possibly with the phydev->lock held. Upon resume, netdev
291 * may call phy routines that try to grab the same lock, and that may
292 * lead to a deadlock.
294 if (phydev->attached_dev && phydev->adjust_link)
295 phy_stop_machine(phydev);
297 if (!mdio_bus_phy_may_suspend(phydev))
300 phydev->suspended_by_mdio_bus = 1;
302 return phy_suspend(phydev);
305 static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
307 struct phy_device *phydev = to_phy_device(dev);
310 if (phydev->mac_managed_pm)
313 if (!phydev->suspended_by_mdio_bus)
316 phydev->suspended_by_mdio_bus = 0;
318 ret = phy_init_hw(phydev);
322 ret = phy_resume(phydev);
326 if (phy_interrupt_is_valid(phydev)) {
327 phydev->irq_suspended = 0;
328 synchronize_irq(phydev->irq);
330 /* Rerun interrupts which were postponed by phy_interrupt()
331 * because they occurred during the system sleep transition.
333 if (phydev->irq_rerun) {
334 phydev->irq_rerun = 0;
335 enable_irq(phydev->irq);
336 irq_wake_thread(phydev->irq, phydev);
340 if (phydev->attached_dev && phydev->adjust_link)
341 phy_start_machine(phydev);
346 static SIMPLE_DEV_PM_OPS(mdio_bus_phy_pm_ops, mdio_bus_phy_suspend,
347 mdio_bus_phy_resume);
350 * phy_register_fixup - creates a new phy_fixup and adds it to the list
351 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
352 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
353 * It can also be PHY_ANY_UID
354 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
356 * @run: The actual code to be run when a matching PHY is found
358 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
359 int (*run)(struct phy_device *))
361 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
366 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
367 fixup->phy_uid = phy_uid;
368 fixup->phy_uid_mask = phy_uid_mask;
371 mutex_lock(&phy_fixup_lock);
372 list_add_tail(&fixup->list, &phy_fixup_list);
373 mutex_unlock(&phy_fixup_lock);
377 EXPORT_SYMBOL(phy_register_fixup);
379 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
380 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
381 int (*run)(struct phy_device *))
383 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
385 EXPORT_SYMBOL(phy_register_fixup_for_uid);
387 /* Registers a fixup to be run on the PHY with id string bus_id */
388 int phy_register_fixup_for_id(const char *bus_id,
389 int (*run)(struct phy_device *))
391 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
393 EXPORT_SYMBOL(phy_register_fixup_for_id);
396 * phy_unregister_fixup - remove a phy_fixup from the list
397 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
398 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
399 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
401 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
403 struct list_head *pos, *n;
404 struct phy_fixup *fixup;
409 mutex_lock(&phy_fixup_lock);
410 list_for_each_safe(pos, n, &phy_fixup_list) {
411 fixup = list_entry(pos, struct phy_fixup, list);
413 if ((!strcmp(fixup->bus_id, bus_id)) &&
414 ((fixup->phy_uid & phy_uid_mask) ==
415 (phy_uid & phy_uid_mask))) {
416 list_del(&fixup->list);
422 mutex_unlock(&phy_fixup_lock);
426 EXPORT_SYMBOL(phy_unregister_fixup);
428 /* Unregisters a fixup of any PHY with the UID in phy_uid */
429 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
431 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
433 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
435 /* Unregisters a fixup of the PHY with id string bus_id */
436 int phy_unregister_fixup_for_id(const char *bus_id)
438 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
440 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
442 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
443 * Fixups can be set to match any in one or more fields.
445 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
447 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
448 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
451 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
452 (phydev->phy_id & fixup->phy_uid_mask))
453 if (fixup->phy_uid != PHY_ANY_UID)
459 /* Runs any matching fixups for this phydev */
460 static int phy_scan_fixups(struct phy_device *phydev)
462 struct phy_fixup *fixup;
464 mutex_lock(&phy_fixup_lock);
465 list_for_each_entry(fixup, &phy_fixup_list, list) {
466 if (phy_needs_fixup(phydev, fixup)) {
467 int err = fixup->run(phydev);
470 mutex_unlock(&phy_fixup_lock);
473 phydev->has_fixups = true;
476 mutex_unlock(&phy_fixup_lock);
481 static int phy_bus_match(struct device *dev, struct device_driver *drv)
483 struct phy_device *phydev = to_phy_device(dev);
484 struct phy_driver *phydrv = to_phy_driver(drv);
485 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
488 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
491 if (phydrv->match_phy_device)
492 return phydrv->match_phy_device(phydev);
494 if (phydev->is_c45) {
495 for (i = 1; i < num_ids; i++) {
496 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
499 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
500 (phydev->c45_ids.device_ids[i] &
501 phydrv->phy_id_mask))
506 return (phydrv->phy_id & phydrv->phy_id_mask) ==
507 (phydev->phy_id & phydrv->phy_id_mask);
512 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
514 struct phy_device *phydev = to_phy_device(dev);
516 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
518 static DEVICE_ATTR_RO(phy_id);
521 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
523 struct phy_device *phydev = to_phy_device(dev);
524 const char *mode = NULL;
526 if (phy_is_internal(phydev))
529 mode = phy_modes(phydev->interface);
531 return sprintf(buf, "%s\n", mode);
533 static DEVICE_ATTR_RO(phy_interface);
536 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
539 struct phy_device *phydev = to_phy_device(dev);
541 return sprintf(buf, "%d\n", phydev->has_fixups);
543 static DEVICE_ATTR_RO(phy_has_fixups);
545 static ssize_t phy_dev_flags_show(struct device *dev,
546 struct device_attribute *attr,
549 struct phy_device *phydev = to_phy_device(dev);
551 return sprintf(buf, "0x%08x\n", phydev->dev_flags);
553 static DEVICE_ATTR_RO(phy_dev_flags);
555 static struct attribute *phy_dev_attrs[] = {
556 &dev_attr_phy_id.attr,
557 &dev_attr_phy_interface.attr,
558 &dev_attr_phy_has_fixups.attr,
559 &dev_attr_phy_dev_flags.attr,
562 ATTRIBUTE_GROUPS(phy_dev);
564 static const struct device_type mdio_bus_phy_type = {
566 .groups = phy_dev_groups,
567 .release = phy_device_release,
568 .pm = pm_ptr(&mdio_bus_phy_pm_ops),
571 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
575 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
576 MDIO_ID_ARGS(phy_id));
577 /* We only check for failures in executing the usermode binary,
578 * not whether a PHY driver module exists for the PHY ID.
579 * Accept -ENOENT because this may occur in case no initramfs exists,
580 * then modprobe isn't available.
582 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
583 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
584 ret, (unsigned long)phy_id);
591 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
593 struct phy_c45_device_ids *c45_ids)
595 struct phy_device *dev;
596 struct mdio_device *mdiodev;
599 /* We allocate the device, and initialize the default values */
600 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
602 return ERR_PTR(-ENOMEM);
604 mdiodev = &dev->mdio;
605 mdiodev->dev.parent = &bus->dev;
606 mdiodev->dev.bus = &mdio_bus_type;
607 mdiodev->dev.type = &mdio_bus_phy_type;
609 mdiodev->bus_match = phy_bus_match;
610 mdiodev->addr = addr;
611 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
612 mdiodev->device_free = phy_mdio_device_free;
613 mdiodev->device_remove = phy_mdio_device_remove;
615 dev->speed = SPEED_UNKNOWN;
616 dev->duplex = DUPLEX_UNKNOWN;
621 dev->interface = PHY_INTERFACE_MODE_GMII;
623 dev->autoneg = AUTONEG_ENABLE;
625 dev->is_c45 = is_c45;
626 dev->phy_id = phy_id;
628 dev->c45_ids = *c45_ids;
629 dev->irq = bus->irq[addr];
631 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
632 device_initialize(&mdiodev->dev);
634 dev->state = PHY_DOWN;
636 mutex_init(&dev->lock);
637 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
639 /* Request the appropriate module unconditionally; don't
640 * bother trying to do so only if it isn't already loaded,
641 * because that gets complicated. A hotplug event would have
642 * done an unconditional modprobe anyway.
643 * We don't do normal hotplug because it won't work for MDIO
644 * -- because it relies on the device staying around for long
645 * enough for the driver to get loaded. With MDIO, the NIC
646 * driver will get bored and give up as soon as it finds that
647 * there's no driver _already_ loaded.
649 if (is_c45 && c45_ids) {
650 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
653 for (i = 1; i < num_ids; i++) {
654 if (c45_ids->device_ids[i] == 0xffffffff)
657 ret = phy_request_driver_module(dev,
658 c45_ids->device_ids[i]);
663 ret = phy_request_driver_module(dev, phy_id);
667 put_device(&mdiodev->dev);
673 EXPORT_SYMBOL(phy_device_create);
675 /* phy_c45_probe_present - checks to see if a MMD is present in the package
676 * @bus: the target MII bus
677 * @prtad: PHY package address on the MII bus
678 * @devad: PHY device (MMD) address
680 * Read the MDIO_STAT2 register, and check whether a device is responding
683 * Returns: negative error number on bus access error, zero if no device
684 * is responding, or positive if a device is present.
686 static int phy_c45_probe_present(struct mii_bus *bus, int prtad, int devad)
690 stat2 = mdiobus_c45_read(bus, prtad, devad, MDIO_STAT2);
694 return (stat2 & MDIO_STAT2_DEVPRST) == MDIO_STAT2_DEVPRST_VAL;
697 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
698 * @bus: the target MII bus
699 * @addr: PHY address on the MII bus
700 * @dev_addr: MMD address in the PHY.
701 * @devices_in_package: where to store the devices in package information.
703 * Description: reads devices in package registers of a MMD at @dev_addr
704 * from PHY at @addr on @bus.
706 * Returns: 0 on success, -EIO on failure.
708 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
709 u32 *devices_in_package)
713 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS2);
716 *devices_in_package = phy_reg << 16;
718 phy_reg = mdiobus_c45_read(bus, addr, dev_addr, MDIO_DEVS1);
721 *devices_in_package |= phy_reg;
727 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
728 * @bus: the target MII bus
729 * @addr: PHY address on the MII bus
730 * @c45_ids: where to store the c45 ID information.
732 * Read the PHY "devices in package". If this appears to be valid, read
733 * the PHY identifiers for each device. Return the "devices in package"
734 * and identifiers in @c45_ids.
736 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
737 * the "devices in package" is invalid.
739 static int get_phy_c45_ids(struct mii_bus *bus, int addr,
740 struct phy_c45_device_ids *c45_ids)
742 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
746 /* Find first non-zero Devices In package. Device zero is reserved
747 * for 802.3 c45 complied PHYs, so don't probe it at first.
749 for (i = 1; i < MDIO_MMD_NUM && (devs_in_pkg == 0 ||
750 (devs_in_pkg & 0x1fffffff) == 0x1fffffff); i++) {
751 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
752 /* Check that there is a device present at this
753 * address before reading the devices-in-package
754 * register to avoid reading garbage from the PHY.
755 * Some PHYs (88x3310) vendor space is not IEEE802.3
758 ret = phy_c45_probe_present(bus, addr, i);
765 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, &devs_in_pkg);
770 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff) {
771 /* If mostly Fs, there is no device there, then let's probe
772 * MMD 0, as some 10G PHYs have zero Devices In package,
773 * e.g. Cortina CS4315/CS4340 PHY.
775 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, &devs_in_pkg);
779 /* no device there, let's get out of here */
780 if ((devs_in_pkg & 0x1fffffff) == 0x1fffffff)
784 /* Now probe Device Identifiers for each device present. */
785 for (i = 1; i < num_ids; i++) {
786 if (!(devs_in_pkg & (1 << i)))
789 if (i == MDIO_MMD_VEND1 || i == MDIO_MMD_VEND2) {
790 /* Probe the "Device Present" bits for the vendor MMDs
791 * to ignore these if they do not contain IEEE 802.3
794 ret = phy_c45_probe_present(bus, addr, i);
802 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID1);
805 c45_ids->device_ids[i] = phy_reg << 16;
807 phy_reg = mdiobus_c45_read(bus, addr, i, MII_PHYSID2);
810 c45_ids->device_ids[i] |= phy_reg;
813 c45_ids->devices_in_package = devs_in_pkg;
814 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
815 c45_ids->mmds_present = devs_in_pkg & ~BIT(0);
821 * get_phy_c22_id - reads the specified addr for its clause 22 ID.
822 * @bus: the target MII bus
823 * @addr: PHY address on the MII bus
824 * @phy_id: where to store the ID retrieved.
826 * Read the 802.3 clause 22 PHY ID from the PHY at @addr on the @bus,
827 * placing it in @phy_id. Return zero on successful read and the ID is
828 * valid, %-EIO on bus access error, or %-ENODEV if no device responds
831 static int get_phy_c22_id(struct mii_bus *bus, int addr, u32 *phy_id)
835 /* Grab the bits from PHYIR1, and put them in the upper half */
836 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
838 /* returning -ENODEV doesn't stop bus scanning */
839 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
842 *phy_id = phy_reg << 16;
844 /* Grab the bits from PHYIR2, and put them in the lower half */
845 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
847 /* returning -ENODEV doesn't stop bus scanning */
848 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
853 /* If the phy_id is mostly Fs, there is no device there */
854 if ((*phy_id & 0x1fffffff) == 0x1fffffff)
860 /* Extract the phy ID from the compatible string of the form
861 * ethernet-phy-idAAAA.BBBB.
863 int fwnode_get_phy_id(struct fwnode_handle *fwnode, u32 *phy_id)
865 unsigned int upper, lower;
869 ret = fwnode_property_read_string(fwnode, "compatible", &cp);
873 if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
876 *phy_id = ((upper & GENMASK(15, 0)) << 16) | (lower & GENMASK(15, 0));
879 EXPORT_SYMBOL(fwnode_get_phy_id);
882 * get_phy_device - reads the specified PHY device and returns its @phy_device
884 * @bus: the target MII bus
885 * @addr: PHY address on the MII bus
886 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
888 * Probe for a PHY at @addr on @bus.
890 * When probing for a clause 22 PHY, then read the ID registers. If we find
891 * a valid ID, allocate and return a &struct phy_device.
893 * When probing for a clause 45 PHY, read the "devices in package" registers.
894 * If the "devices in package" appears valid, read the ID registers for each
895 * MMD, allocate and return a &struct phy_device.
897 * Returns an allocated &struct phy_device on success, %-ENODEV if there is
898 * no PHY present, or %-EIO on bus access error.
900 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
902 struct phy_c45_device_ids c45_ids;
906 c45_ids.devices_in_package = 0;
907 c45_ids.mmds_present = 0;
908 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
911 r = get_phy_c45_ids(bus, addr, &c45_ids);
913 r = get_phy_c22_id(bus, addr, &phy_id);
918 /* PHY device such as the Marvell Alaska 88E2110 will return a PHY ID
919 * of 0 when probed using get_phy_c22_id() with no error. Proceed to
920 * probe with C45 to see if we're able to get a valid PHY ID in the C45
921 * space, if successful, create the C45 PHY device.
923 if (!is_c45 && phy_id == 0 && bus->probe_capabilities >= MDIOBUS_C45) {
924 r = get_phy_c45_ids(bus, addr, &c45_ids);
926 return phy_device_create(bus, addr, phy_id,
930 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
932 EXPORT_SYMBOL(get_phy_device);
935 * phy_device_register - Register the phy device on the MDIO bus
936 * @phydev: phy_device structure to be added to the MDIO bus
938 int phy_device_register(struct phy_device *phydev)
942 err = mdiobus_register_device(&phydev->mdio);
946 /* Deassert the reset signal */
947 phy_device_reset(phydev, 0);
949 /* Run all of the fixups for this PHY */
950 err = phy_scan_fixups(phydev);
952 phydev_err(phydev, "failed to initialize\n");
956 err = device_add(&phydev->mdio.dev);
958 phydev_err(phydev, "failed to add\n");
965 /* Assert the reset signal */
966 phy_device_reset(phydev, 1);
968 mdiobus_unregister_device(&phydev->mdio);
971 EXPORT_SYMBOL(phy_device_register);
974 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
975 * @phydev: phy_device structure to remove
977 * This doesn't free the phy_device itself, it merely reverses the effects
978 * of phy_device_register(). Use phy_device_free() to free the device
979 * after calling this function.
981 void phy_device_remove(struct phy_device *phydev)
983 unregister_mii_timestamper(phydev->mii_ts);
985 device_del(&phydev->mdio.dev);
987 /* Assert the reset signal */
988 phy_device_reset(phydev, 1);
990 mdiobus_unregister_device(&phydev->mdio);
992 EXPORT_SYMBOL(phy_device_remove);
995 * phy_get_c45_ids - Read 802.3-c45 IDs for phy device.
996 * @phydev: phy_device structure to read 802.3-c45 IDs
998 * Returns zero on success, %-EIO on bus access error, or %-ENODEV if
999 * the "devices in package" is invalid.
1001 int phy_get_c45_ids(struct phy_device *phydev)
1003 return get_phy_c45_ids(phydev->mdio.bus, phydev->mdio.addr,
1006 EXPORT_SYMBOL(phy_get_c45_ids);
1009 * phy_find_first - finds the first PHY device on the bus
1010 * @bus: the target MII bus
1012 struct phy_device *phy_find_first(struct mii_bus *bus)
1014 struct phy_device *phydev;
1017 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
1018 phydev = mdiobus_get_phy(bus, addr);
1024 EXPORT_SYMBOL(phy_find_first);
1026 static void phy_link_change(struct phy_device *phydev, bool up)
1028 struct net_device *netdev = phydev->attached_dev;
1031 netif_carrier_on(netdev);
1033 netif_carrier_off(netdev);
1034 phydev->adjust_link(netdev);
1035 if (phydev->mii_ts && phydev->mii_ts->link_state)
1036 phydev->mii_ts->link_state(phydev->mii_ts, phydev);
1040 * phy_prepare_link - prepares the PHY layer to monitor link status
1041 * @phydev: target phy_device struct
1042 * @handler: callback function for link status change notifications
1044 * Description: Tells the PHY infrastructure to handle the
1045 * gory details on monitoring link status (whether through
1046 * polling or an interrupt), and to call back to the
1047 * connected device driver when the link status changes.
1048 * If you want to monitor your own link state, don't call
1051 static void phy_prepare_link(struct phy_device *phydev,
1052 void (*handler)(struct net_device *))
1054 phydev->adjust_link = handler;
1058 * phy_connect_direct - connect an ethernet device to a specific phy_device
1059 * @dev: the network device to connect
1060 * @phydev: the pointer to the phy device
1061 * @handler: callback function for state change notifications
1062 * @interface: PHY device's interface
1064 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
1065 void (*handler)(struct net_device *),
1066 phy_interface_t interface)
1073 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1077 phy_prepare_link(phydev, handler);
1078 if (phy_interrupt_is_valid(phydev))
1079 phy_request_interrupt(phydev);
1083 EXPORT_SYMBOL(phy_connect_direct);
1086 * phy_connect - connect an ethernet device to a PHY device
1087 * @dev: the network device to connect
1088 * @bus_id: the id string of the PHY device to connect
1089 * @handler: callback function for state change notifications
1090 * @interface: PHY device's interface
1092 * Description: Convenience function for connecting ethernet
1093 * devices to PHY devices. The default behavior is for
1094 * the PHY infrastructure to handle everything, and only notify
1095 * the connected driver when the link status changes. If you
1096 * don't want, or can't use the provided functionality, you may
1097 * choose to call only the subset of functions which provide
1098 * the desired functionality.
1100 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
1101 void (*handler)(struct net_device *),
1102 phy_interface_t interface)
1104 struct phy_device *phydev;
1108 /* Search the list of PHY devices on the mdio bus for the
1109 * PHY with the requested name
1111 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1113 pr_err("PHY %s not found\n", bus_id);
1114 return ERR_PTR(-ENODEV);
1116 phydev = to_phy_device(d);
1118 rc = phy_connect_direct(dev, phydev, handler, interface);
1125 EXPORT_SYMBOL(phy_connect);
1128 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1130 * @phydev: target phy_device struct
1132 void phy_disconnect(struct phy_device *phydev)
1134 if (phy_is_started(phydev))
1137 if (phy_interrupt_is_valid(phydev))
1138 phy_free_interrupt(phydev);
1140 phydev->adjust_link = NULL;
1144 EXPORT_SYMBOL(phy_disconnect);
1147 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1148 * @phydev: The PHY device to poll
1150 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1151 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1152 * register must be polled until the BMCR_RESET bit clears.
1154 * Furthermore, any attempts to write to PHY registers may have no effect
1155 * or even generate MDIO bus errors until this is complete.
1157 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1158 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1159 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1160 * effort to support such broken PHYs, this function is separate from the
1161 * standard phy_init_hw() which will zero all the other bits in the BMCR
1162 * and reapply all driver-specific and board-specific fixups.
1164 static int phy_poll_reset(struct phy_device *phydev)
1166 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1169 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
1170 50000, 600000, true);
1173 /* Some chips (smsc911x) may still need up to another 1ms after the
1174 * BMCR_RESET bit is cleared before they are usable.
1180 int phy_init_hw(struct phy_device *phydev)
1184 /* Deassert the reset signal */
1185 phy_device_reset(phydev, 0);
1190 if (phydev->drv->soft_reset) {
1191 ret = phydev->drv->soft_reset(phydev);
1192 /* see comment in genphy_soft_reset for an explanation */
1194 phydev->suspended = 0;
1200 ret = phy_scan_fixups(phydev);
1204 if (phydev->drv->config_init) {
1205 ret = phydev->drv->config_init(phydev);
1210 if (phydev->drv->config_intr) {
1211 ret = phydev->drv->config_intr(phydev);
1218 EXPORT_SYMBOL(phy_init_hw);
1220 void phy_attached_info(struct phy_device *phydev)
1222 phy_attached_print(phydev, NULL);
1224 EXPORT_SYMBOL(phy_attached_info);
1226 #define ATTACHED_FMT "attached PHY driver %s(mii_bus:phy_addr=%s, irq=%s)"
1227 char *phy_attached_info_irq(struct phy_device *phydev)
1232 switch(phydev->irq) {
1236 case PHY_MAC_INTERRUPT:
1240 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1245 return kasprintf(GFP_KERNEL, "%s", irq_str);
1247 EXPORT_SYMBOL(phy_attached_info_irq);
1249 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1251 const char *unbound = phydev->drv ? "" : "[unbound] ";
1252 char *irq_str = phy_attached_info_irq(phydev);
1255 phydev_info(phydev, ATTACHED_FMT "\n", unbound,
1256 phydev_name(phydev), irq_str);
1260 phydev_info(phydev, ATTACHED_FMT, unbound,
1261 phydev_name(phydev), irq_str);
1269 EXPORT_SYMBOL(phy_attached_print);
1271 static void phy_sysfs_create_links(struct phy_device *phydev)
1273 struct net_device *dev = phydev->attached_dev;
1279 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1284 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1285 &phydev->mdio.dev.kobj,
1288 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1289 kobject_name(&phydev->mdio.dev.kobj),
1291 /* non-fatal - some net drivers can use one netdevice
1292 * with more then one phy
1296 phydev->sysfs_links = true;
1300 phy_standalone_show(struct device *dev, struct device_attribute *attr,
1303 struct phy_device *phydev = to_phy_device(dev);
1305 return sprintf(buf, "%d\n", !phydev->attached_dev);
1307 static DEVICE_ATTR_RO(phy_standalone);
1310 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1311 * @upstream: pointer to the phy device
1312 * @bus: sfp bus representing cage being attached
1314 * This is used to fill in the sfp_upstream_ops .attach member.
1316 void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1318 struct phy_device *phydev = upstream;
1320 if (phydev->attached_dev)
1321 phydev->attached_dev->sfp_bus = bus;
1322 phydev->sfp_bus_attached = true;
1324 EXPORT_SYMBOL(phy_sfp_attach);
1327 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1328 * @upstream: pointer to the phy device
1329 * @bus: sfp bus representing cage being attached
1331 * This is used to fill in the sfp_upstream_ops .detach member.
1333 void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1335 struct phy_device *phydev = upstream;
1337 if (phydev->attached_dev)
1338 phydev->attached_dev->sfp_bus = NULL;
1339 phydev->sfp_bus_attached = false;
1341 EXPORT_SYMBOL(phy_sfp_detach);
1344 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1345 * @phydev: Pointer to phy_device
1346 * @ops: SFP's upstream operations
1348 int phy_sfp_probe(struct phy_device *phydev,
1349 const struct sfp_upstream_ops *ops)
1351 struct sfp_bus *bus;
1354 if (phydev->mdio.dev.fwnode) {
1355 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1357 return PTR_ERR(bus);
1359 phydev->sfp_bus = bus;
1361 ret = sfp_bus_add_upstream(bus, phydev, ops);
1366 EXPORT_SYMBOL(phy_sfp_probe);
1369 * phy_attach_direct - attach a network device to a given PHY device pointer
1370 * @dev: network device to attach
1371 * @phydev: Pointer to phy_device to attach
1372 * @flags: PHY device's dev_flags
1373 * @interface: PHY device's interface
1375 * Description: Called by drivers to attach to a particular PHY
1376 * device. The phy_device is found, and properly hooked up
1377 * to the phy_driver. If no driver is attached, then a
1378 * generic driver is used. The phy_device is given a ptr to
1379 * the attaching device, and given a callback for link status
1380 * change. The phy_device is returned to the attaching driver.
1381 * This function takes a reference on the phy device.
1383 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1384 u32 flags, phy_interface_t interface)
1386 struct mii_bus *bus = phydev->mdio.bus;
1387 struct device *d = &phydev->mdio.dev;
1388 struct module *ndev_owner = NULL;
1389 bool using_genphy = false;
1392 /* For Ethernet device drivers that register their own MDIO bus, we
1393 * will have bus->owner match ndev_mod, so we do not want to increment
1394 * our own module->refcnt here, otherwise we would not be able to
1398 ndev_owner = dev->dev.parent->driver->owner;
1399 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1400 phydev_err(phydev, "failed to get the bus module\n");
1406 /* Assume that if there is no driver, that it doesn't
1407 * exist, and we should use the genphy driver.
1411 d->driver = &genphy_c45_driver.mdiodrv.driver;
1413 d->driver = &genphy_driver.mdiodrv.driver;
1415 using_genphy = true;
1418 if (!try_module_get(d->driver->owner)) {
1419 phydev_err(phydev, "failed to get the device driver module\n");
1421 goto error_put_device;
1425 err = d->driver->probe(d);
1427 err = device_bind_driver(d);
1430 goto error_module_put;
1433 if (phydev->attached_dev) {
1434 dev_err(&dev->dev, "PHY already attached\n");
1439 phydev->phy_link_change = phy_link_change;
1441 phydev->attached_dev = dev;
1442 dev->phydev = phydev;
1444 if (phydev->sfp_bus_attached)
1445 dev->sfp_bus = phydev->sfp_bus;
1446 else if (dev->sfp_bus)
1447 phydev->is_on_sfp_module = true;
1450 /* Some Ethernet drivers try to connect to a PHY device before
1451 * calling register_netdevice() -> netdev_register_kobject() and
1452 * does the dev->dev.kobj initialization. Here we only check for
1453 * success which indicates that the network device kobject is
1454 * ready. Once we do that we still need to keep track of whether
1455 * links were successfully set up or not for phy_detach() to
1456 * remove them accordingly.
1458 phydev->sysfs_links = false;
1460 phy_sysfs_create_links(phydev);
1462 if (!phydev->attached_dev) {
1463 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1464 &dev_attr_phy_standalone.attr);
1466 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1469 phydev->dev_flags |= flags;
1471 phydev->interface = interface;
1473 phydev->state = PHY_READY;
1475 /* Port is set to PORT_TP by default and the actual PHY driver will set
1476 * it to different value depending on the PHY configuration. If we have
1477 * the generic PHY driver we can't figure it out, thus set the old
1478 * legacy PORT_MII value.
1481 phydev->port = PORT_MII;
1483 /* Initial carrier state is off as the phy is about to be
1487 netif_carrier_off(phydev->attached_dev);
1489 /* Do initial configuration here, now that
1490 * we have certain key parameters
1491 * (dev_flags and interface)
1493 err = phy_init_hw(phydev);
1497 err = phy_disable_interrupts(phydev);
1502 phy_led_triggers_register(phydev);
1507 /* phy_detach() does all of the cleanup below */
1512 module_put(d->driver->owner);
1515 if (ndev_owner != bus->owner)
1516 module_put(bus->owner);
1519 EXPORT_SYMBOL(phy_attach_direct);
1522 * phy_attach - attach a network device to a particular PHY device
1523 * @dev: network device to attach
1524 * @bus_id: Bus ID of PHY device to attach
1525 * @interface: PHY device's interface
1527 * Description: Same as phy_attach_direct() except that a PHY bus_id
1528 * string is passed instead of a pointer to a struct phy_device.
1530 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1531 phy_interface_t interface)
1533 struct bus_type *bus = &mdio_bus_type;
1534 struct phy_device *phydev;
1539 return ERR_PTR(-EINVAL);
1541 /* Search the list of PHY devices on the mdio bus for the
1542 * PHY with the requested name
1544 d = bus_find_device_by_name(bus, NULL, bus_id);
1546 pr_err("PHY %s not found\n", bus_id);
1547 return ERR_PTR(-ENODEV);
1549 phydev = to_phy_device(d);
1551 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1558 EXPORT_SYMBOL(phy_attach);
1560 static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1561 struct device_driver *driver)
1563 struct device *d = &phydev->mdio.dev;
1570 ret = d->driver == driver;
1576 bool phy_driver_is_genphy(struct phy_device *phydev)
1578 return phy_driver_is_genphy_kind(phydev,
1579 &genphy_driver.mdiodrv.driver);
1581 EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1583 bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1585 return phy_driver_is_genphy_kind(phydev,
1586 &genphy_c45_driver.mdiodrv.driver);
1588 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1591 * phy_package_join - join a common PHY group
1592 * @phydev: target phy_device struct
1593 * @addr: cookie and PHY address for global register access
1594 * @priv_size: if non-zero allocate this amount of bytes for private data
1596 * This joins a PHY group and provides a shared storage for all phydevs in
1597 * this group. This is intended to be used for packages which contain
1598 * more than one PHY, for example a quad PHY transceiver.
1600 * The addr parameter serves as a cookie which has to have the same value
1601 * for all members of one group and as a PHY address to access generic
1602 * registers of a PHY package. Usually, one of the PHY addresses of the
1603 * different PHYs in the package provides access to these global registers.
1604 * The address which is given here, will be used in the phy_package_read()
1605 * and phy_package_write() convenience functions. If your PHY doesn't have
1606 * global registers you can just pick any of the PHY addresses.
1608 * This will set the shared pointer of the phydev to the shared storage.
1609 * If this is the first call for a this cookie the shared storage will be
1610 * allocated. If priv_size is non-zero, the given amount of bytes are
1611 * allocated for the priv member.
1613 * Returns < 1 on error, 0 on success. Esp. calling phy_package_join()
1614 * with the same cookie but a different priv_size is an error.
1616 int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size)
1618 struct mii_bus *bus = phydev->mdio.bus;
1619 struct phy_package_shared *shared;
1622 if (addr < 0 || addr >= PHY_MAX_ADDR)
1625 mutex_lock(&bus->shared_lock);
1626 shared = bus->shared[addr];
1629 shared = kzalloc(sizeof(*shared), GFP_KERNEL);
1633 shared->priv = kzalloc(priv_size, GFP_KERNEL);
1636 shared->priv_size = priv_size;
1638 shared->addr = addr;
1639 refcount_set(&shared->refcnt, 1);
1640 bus->shared[addr] = shared;
1643 if (priv_size && priv_size != shared->priv_size)
1645 refcount_inc(&shared->refcnt);
1647 mutex_unlock(&bus->shared_lock);
1649 phydev->shared = shared;
1656 mutex_unlock(&bus->shared_lock);
1659 EXPORT_SYMBOL_GPL(phy_package_join);
1662 * phy_package_leave - leave a common PHY group
1663 * @phydev: target phy_device struct
1665 * This leaves a PHY group created by phy_package_join(). If this phydev
1666 * was the last user of the shared data between the group, this data is
1667 * freed. Resets the phydev->shared pointer to NULL.
1669 void phy_package_leave(struct phy_device *phydev)
1671 struct phy_package_shared *shared = phydev->shared;
1672 struct mii_bus *bus = phydev->mdio.bus;
1677 if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) {
1678 bus->shared[shared->addr] = NULL;
1679 mutex_unlock(&bus->shared_lock);
1680 kfree(shared->priv);
1684 phydev->shared = NULL;
1686 EXPORT_SYMBOL_GPL(phy_package_leave);
1688 static void devm_phy_package_leave(struct device *dev, void *res)
1690 phy_package_leave(*(struct phy_device **)res);
1694 * devm_phy_package_join - resource managed phy_package_join()
1695 * @dev: device that is registering this PHY package
1696 * @phydev: target phy_device struct
1697 * @addr: cookie and PHY address for global register access
1698 * @priv_size: if non-zero allocate this amount of bytes for private data
1700 * Managed phy_package_join(). Shared storage fetched by this function,
1701 * phy_package_leave() is automatically called on driver detach. See
1702 * phy_package_join() for more information.
1704 int devm_phy_package_join(struct device *dev, struct phy_device *phydev,
1705 int addr, size_t priv_size)
1707 struct phy_device **ptr;
1710 ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr),
1715 ret = phy_package_join(phydev, addr, priv_size);
1719 devres_add(dev, ptr);
1726 EXPORT_SYMBOL_GPL(devm_phy_package_join);
1729 * phy_detach - detach a PHY device from its network device
1730 * @phydev: target phy_device struct
1732 * This detaches the phy device from its network device and the phy
1733 * driver, and drops the reference count taken in phy_attach_direct().
1735 void phy_detach(struct phy_device *phydev)
1737 struct net_device *dev = phydev->attached_dev;
1738 struct module *ndev_owner = NULL;
1739 struct mii_bus *bus;
1741 if (phydev->sysfs_links) {
1743 sysfs_remove_link(&dev->dev.kobj, "phydev");
1744 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1747 if (!phydev->attached_dev)
1748 sysfs_remove_file(&phydev->mdio.dev.kobj,
1749 &dev_attr_phy_standalone.attr);
1751 phy_suspend(phydev);
1753 phydev->attached_dev->phydev = NULL;
1754 phydev->attached_dev = NULL;
1756 phydev->phylink = NULL;
1758 phy_led_triggers_unregister(phydev);
1760 if (phydev->mdio.dev.driver)
1761 module_put(phydev->mdio.dev.driver->owner);
1763 /* If the device had no specific driver before (i.e. - it
1764 * was using the generic driver), we unbind the device
1765 * from the generic driver so that there's a chance a
1766 * real driver could be loaded
1768 if (phy_driver_is_genphy(phydev) ||
1769 phy_driver_is_genphy_10g(phydev))
1770 device_release_driver(&phydev->mdio.dev);
1772 /* Assert the reset signal */
1773 phy_device_reset(phydev, 1);
1776 * The phydev might go away on the put_device() below, so avoid
1777 * a use-after-free bug by reading the underlying bus first.
1779 bus = phydev->mdio.bus;
1781 put_device(&phydev->mdio.dev);
1783 ndev_owner = dev->dev.parent->driver->owner;
1784 if (ndev_owner != bus->owner)
1785 module_put(bus->owner);
1787 EXPORT_SYMBOL(phy_detach);
1789 int phy_suspend(struct phy_device *phydev)
1791 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1792 struct net_device *netdev = phydev->attached_dev;
1793 struct phy_driver *phydrv = phydev->drv;
1796 if (phydev->suspended)
1799 /* If the device has WOL enabled, we cannot suspend the PHY */
1800 phy_ethtool_get_wol(phydev, &wol);
1801 if (wol.wolopts || (netdev && netdev->wol_enabled))
1804 if (!phydrv || !phydrv->suspend)
1807 ret = phydrv->suspend(phydev);
1809 phydev->suspended = true;
1813 EXPORT_SYMBOL(phy_suspend);
1815 int __phy_resume(struct phy_device *phydev)
1817 struct phy_driver *phydrv = phydev->drv;
1820 lockdep_assert_held(&phydev->lock);
1822 if (!phydrv || !phydrv->resume)
1825 ret = phydrv->resume(phydev);
1827 phydev->suspended = false;
1831 EXPORT_SYMBOL(__phy_resume);
1833 int phy_resume(struct phy_device *phydev)
1837 mutex_lock(&phydev->lock);
1838 ret = __phy_resume(phydev);
1839 mutex_unlock(&phydev->lock);
1843 EXPORT_SYMBOL(phy_resume);
1845 int phy_loopback(struct phy_device *phydev, bool enable)
1852 mutex_lock(&phydev->lock);
1854 if (enable && phydev->loopback_enabled) {
1859 if (!enable && !phydev->loopback_enabled) {
1864 if (phydev->drv->set_loopback)
1865 ret = phydev->drv->set_loopback(phydev, enable);
1867 ret = genphy_loopback(phydev, enable);
1872 phydev->loopback_enabled = enable;
1875 mutex_unlock(&phydev->lock);
1878 EXPORT_SYMBOL(phy_loopback);
1881 * phy_reset_after_clk_enable - perform a PHY reset if needed
1882 * @phydev: target phy_device struct
1884 * Description: Some PHYs are known to need a reset after their refclk was
1885 * enabled. This function evaluates the flags and perform the reset if it's
1886 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1889 int phy_reset_after_clk_enable(struct phy_device *phydev)
1891 if (!phydev || !phydev->drv)
1894 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1895 phy_device_reset(phydev, 1);
1896 phy_device_reset(phydev, 0);
1902 EXPORT_SYMBOL(phy_reset_after_clk_enable);
1904 /* Generic PHY support and helper functions */
1907 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1908 * @phydev: target phy_device struct
1910 * Description: Writes MII_ADVERTISE with the appropriate values,
1911 * after sanitizing the values to make sure we only advertise
1912 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1913 * hasn't changed, and > 0 if it has changed.
1915 static int genphy_config_advert(struct phy_device *phydev)
1917 int err, bmsr, changed = 0;
1920 /* Only allow advertising what this PHY supports */
1921 linkmode_and(phydev->advertising, phydev->advertising,
1924 adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
1926 /* Setup standard advertisement */
1927 err = phy_modify_changed(phydev, MII_ADVERTISE,
1928 ADVERTISE_ALL | ADVERTISE_100BASE4 |
1929 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
1936 bmsr = phy_read(phydev, MII_BMSR);
1940 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1941 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1944 if (!(bmsr & BMSR_ESTATEN))
1947 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
1949 err = phy_modify_changed(phydev, MII_CTRL1000,
1950 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
1961 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
1962 * @phydev: target phy_device struct
1964 * Description: Writes MII_ADVERTISE with the appropriate values,
1965 * after sanitizing the values to make sure we only advertise
1966 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1967 * hasn't changed, and > 0 if it has changed. This function is intended
1968 * for Clause 37 1000Base-X mode.
1970 static int genphy_c37_config_advert(struct phy_device *phydev)
1974 /* Only allow advertising what this PHY supports */
1975 linkmode_and(phydev->advertising, phydev->advertising,
1978 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
1979 phydev->advertising))
1980 adv |= ADVERTISE_1000XFULL;
1981 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
1982 phydev->advertising))
1983 adv |= ADVERTISE_1000XPAUSE;
1984 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
1985 phydev->advertising))
1986 adv |= ADVERTISE_1000XPSE_ASYM;
1988 return phy_modify_changed(phydev, MII_ADVERTISE,
1989 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1990 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
1995 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1996 * @phydev: target phy_device struct
1998 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1999 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
2000 * changed, and 1 if it has changed.
2002 int genphy_config_eee_advert(struct phy_device *phydev)
2006 /* Nothing to disable */
2007 if (!phydev->eee_broken_modes)
2010 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
2011 phydev->eee_broken_modes, 0);
2012 /* If the call failed, we assume that EEE is not supported */
2013 return err < 0 ? 0 : err;
2015 EXPORT_SYMBOL(genphy_config_eee_advert);
2018 * genphy_setup_forced - configures/forces speed/duplex from @phydev
2019 * @phydev: target phy_device struct
2021 * Description: Configures MII_BMCR to force speed/duplex
2022 * to the values in phydev. Assumes that the values are valid.
2023 * Please see phy_sanitize_settings().
2025 int genphy_setup_forced(struct phy_device *phydev)
2030 phydev->asym_pause = 0;
2032 if (SPEED_1000 == phydev->speed)
2033 ctl |= BMCR_SPEED1000;
2034 else if (SPEED_100 == phydev->speed)
2035 ctl |= BMCR_SPEED100;
2037 if (DUPLEX_FULL == phydev->duplex)
2038 ctl |= BMCR_FULLDPLX;
2040 return phy_modify(phydev, MII_BMCR,
2041 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
2043 EXPORT_SYMBOL(genphy_setup_forced);
2045 static int genphy_setup_master_slave(struct phy_device *phydev)
2049 if (!phydev->is_gigabit_capable)
2052 switch (phydev->master_slave_set) {
2053 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
2054 ctl |= CTL1000_PREFER_MASTER;
2056 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
2058 case MASTER_SLAVE_CFG_MASTER_FORCE:
2059 ctl |= CTL1000_AS_MASTER;
2061 case MASTER_SLAVE_CFG_SLAVE_FORCE:
2062 ctl |= CTL1000_ENABLE_MASTER;
2064 case MASTER_SLAVE_CFG_UNKNOWN:
2065 case MASTER_SLAVE_CFG_UNSUPPORTED:
2068 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
2072 return phy_modify_changed(phydev, MII_CTRL1000,
2073 (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER |
2074 CTL1000_PREFER_MASTER), ctl);
2077 static int genphy_read_master_slave(struct phy_device *phydev)
2082 if (!phydev->is_gigabit_capable) {
2083 phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED;
2084 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
2088 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
2089 phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
2091 val = phy_read(phydev, MII_CTRL1000);
2095 if (val & CTL1000_ENABLE_MASTER) {
2096 if (val & CTL1000_AS_MASTER)
2097 cfg = MASTER_SLAVE_CFG_MASTER_FORCE;
2099 cfg = MASTER_SLAVE_CFG_SLAVE_FORCE;
2101 if (val & CTL1000_PREFER_MASTER)
2102 cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED;
2104 cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
2107 val = phy_read(phydev, MII_STAT1000);
2111 if (val & LPA_1000MSFAIL) {
2112 state = MASTER_SLAVE_STATE_ERR;
2113 } else if (phydev->link) {
2114 /* this bits are valid only for active link */
2115 if (val & LPA_1000MSRES)
2116 state = MASTER_SLAVE_STATE_MASTER;
2118 state = MASTER_SLAVE_STATE_SLAVE;
2120 state = MASTER_SLAVE_STATE_UNKNOWN;
2123 phydev->master_slave_get = cfg;
2124 phydev->master_slave_state = state;
2130 * genphy_restart_aneg - Enable and Restart Autonegotiation
2131 * @phydev: target phy_device struct
2133 int genphy_restart_aneg(struct phy_device *phydev)
2135 /* Don't isolate the PHY if we're negotiating */
2136 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
2137 BMCR_ANENABLE | BMCR_ANRESTART);
2139 EXPORT_SYMBOL(genphy_restart_aneg);
2142 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
2143 * @phydev: target phy_device struct
2144 * @restart: whether aneg restart is requested
2146 * Check, and restart auto-negotiation if needed.
2148 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
2153 /* Advertisement hasn't changed, but maybe aneg was never on to
2154 * begin with? Or maybe phy was isolated?
2156 ret = phy_read(phydev, MII_BMCR);
2160 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
2165 return genphy_restart_aneg(phydev);
2169 EXPORT_SYMBOL(genphy_check_and_restart_aneg);
2172 * __genphy_config_aneg - restart auto-negotiation or write BMCR
2173 * @phydev: target phy_device struct
2174 * @changed: whether autoneg is requested
2176 * Description: If auto-negotiation is enabled, we configure the
2177 * advertising, and then restart auto-negotiation. If it is not
2178 * enabled, then we write the BMCR.
2180 int __genphy_config_aneg(struct phy_device *phydev, bool changed)
2184 if (genphy_config_eee_advert(phydev))
2187 err = genphy_setup_master_slave(phydev);
2193 if (AUTONEG_ENABLE != phydev->autoneg)
2194 return genphy_setup_forced(phydev);
2196 err = genphy_config_advert(phydev);
2197 if (err < 0) /* error */
2202 return genphy_check_and_restart_aneg(phydev, changed);
2204 EXPORT_SYMBOL(__genphy_config_aneg);
2207 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
2208 * @phydev: target phy_device struct
2210 * Description: If auto-negotiation is enabled, we configure the
2211 * advertising, and then restart auto-negotiation. If it is not
2212 * enabled, then we write the BMCR. This function is intended
2213 * for use with Clause 37 1000Base-X mode.
2215 int genphy_c37_config_aneg(struct phy_device *phydev)
2219 if (phydev->autoneg != AUTONEG_ENABLE)
2220 return genphy_setup_forced(phydev);
2222 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
2227 changed = genphy_c37_config_advert(phydev);
2228 if (changed < 0) /* error */
2232 /* Advertisement hasn't changed, but maybe aneg was never on to
2233 * begin with? Or maybe phy was isolated?
2235 int ctl = phy_read(phydev, MII_BMCR);
2240 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
2241 changed = 1; /* do restart aneg */
2244 /* Only restart aneg if we are advertising something different
2245 * than we were before.
2248 return genphy_restart_aneg(phydev);
2252 EXPORT_SYMBOL(genphy_c37_config_aneg);
2255 * genphy_aneg_done - return auto-negotiation status
2256 * @phydev: target phy_device struct
2258 * Description: Reads the status register and returns 0 either if
2259 * auto-negotiation is incomplete, or if there was an error.
2260 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
2262 int genphy_aneg_done(struct phy_device *phydev)
2264 int retval = phy_read(phydev, MII_BMSR);
2266 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
2268 EXPORT_SYMBOL(genphy_aneg_done);
2271 * genphy_update_link - update link status in @phydev
2272 * @phydev: target phy_device struct
2274 * Description: Update the value in phydev->link to reflect the
2275 * current link value. In order to do this, we need to read
2276 * the status register twice, keeping the second value.
2278 int genphy_update_link(struct phy_device *phydev)
2280 int status = 0, bmcr;
2282 bmcr = phy_read(phydev, MII_BMCR);
2286 /* Autoneg is being started, therefore disregard BMSR value and
2287 * report link as down.
2289 if (bmcr & BMCR_ANRESTART)
2292 /* The link state is latched low so that momentary link
2293 * drops can be detected. Do not double-read the status
2294 * in polling mode to detect such short link drops except
2295 * the link was already down.
2297 if (!phy_polling_mode(phydev) || !phydev->link) {
2298 status = phy_read(phydev, MII_BMSR);
2301 else if (status & BMSR_LSTATUS)
2305 /* Read link and autonegotiation status */
2306 status = phy_read(phydev, MII_BMSR);
2310 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
2311 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
2313 /* Consider the case that autoneg was started and "aneg complete"
2314 * bit has been reset, but "link up" bit not yet.
2316 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
2321 EXPORT_SYMBOL(genphy_update_link);
2323 int genphy_read_lpa(struct phy_device *phydev)
2327 if (phydev->autoneg == AUTONEG_ENABLE) {
2328 if (!phydev->autoneg_complete) {
2329 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2331 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
2335 if (phydev->is_gigabit_capable) {
2336 lpagb = phy_read(phydev, MII_STAT1000);
2340 if (lpagb & LPA_1000MSFAIL) {
2341 int adv = phy_read(phydev, MII_CTRL1000);
2346 if (adv & CTL1000_ENABLE_MASTER)
2347 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
2349 phydev_err(phydev, "Master/Slave resolution failed\n");
2353 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
2357 lpa = phy_read(phydev, MII_LPA);
2361 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
2363 linkmode_zero(phydev->lp_advertising);
2368 EXPORT_SYMBOL(genphy_read_lpa);
2371 * genphy_read_status_fixed - read the link parameters for !aneg mode
2372 * @phydev: target phy_device struct
2374 * Read the current duplex and speed state for a PHY operating with
2375 * autonegotiation disabled.
2377 int genphy_read_status_fixed(struct phy_device *phydev)
2379 int bmcr = phy_read(phydev, MII_BMCR);
2384 if (bmcr & BMCR_FULLDPLX)
2385 phydev->duplex = DUPLEX_FULL;
2387 phydev->duplex = DUPLEX_HALF;
2389 if (bmcr & BMCR_SPEED1000)
2390 phydev->speed = SPEED_1000;
2391 else if (bmcr & BMCR_SPEED100)
2392 phydev->speed = SPEED_100;
2394 phydev->speed = SPEED_10;
2398 EXPORT_SYMBOL(genphy_read_status_fixed);
2401 * genphy_read_status - check the link status and update current link state
2402 * @phydev: target phy_device struct
2404 * Description: Check the link, then figure out the current state
2405 * by comparing what we advertise with what the link partner
2406 * advertises. Start by checking the gigabit possibilities,
2407 * then move on to 10/100.
2409 int genphy_read_status(struct phy_device *phydev)
2411 int err, old_link = phydev->link;
2413 /* Update the link, but return if there was an error */
2414 err = genphy_update_link(phydev);
2418 /* why bother the PHY if nothing can have changed */
2419 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2422 phydev->speed = SPEED_UNKNOWN;
2423 phydev->duplex = DUPLEX_UNKNOWN;
2425 phydev->asym_pause = 0;
2427 err = genphy_read_master_slave(phydev);
2431 err = genphy_read_lpa(phydev);
2435 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2436 phy_resolve_aneg_linkmode(phydev);
2437 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2438 err = genphy_read_status_fixed(phydev);
2445 EXPORT_SYMBOL(genphy_read_status);
2448 * genphy_c37_read_status - check the link status and update current link state
2449 * @phydev: target phy_device struct
2451 * Description: Check the link, then figure out the current state
2452 * by comparing what we advertise with what the link partner
2453 * advertises. This function is for Clause 37 1000Base-X mode.
2455 int genphy_c37_read_status(struct phy_device *phydev)
2457 int lpa, err, old_link = phydev->link;
2459 /* Update the link, but return if there was an error */
2460 err = genphy_update_link(phydev);
2464 /* why bother the PHY if nothing can have changed */
2465 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2468 phydev->duplex = DUPLEX_UNKNOWN;
2470 phydev->asym_pause = 0;
2472 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2473 lpa = phy_read(phydev, MII_LPA);
2477 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2478 phydev->lp_advertising, lpa & LPA_LPACK);
2479 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2480 phydev->lp_advertising, lpa & LPA_1000XFULL);
2481 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2482 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2483 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2484 phydev->lp_advertising,
2485 lpa & LPA_1000XPAUSE_ASYM);
2487 phy_resolve_aneg_linkmode(phydev);
2488 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2489 int bmcr = phy_read(phydev, MII_BMCR);
2494 if (bmcr & BMCR_FULLDPLX)
2495 phydev->duplex = DUPLEX_FULL;
2497 phydev->duplex = DUPLEX_HALF;
2502 EXPORT_SYMBOL(genphy_c37_read_status);
2505 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2506 * @phydev: target phy_device struct
2508 * Description: Perform a software PHY reset using the standard
2509 * BMCR_RESET bit and poll for the reset bit to be cleared.
2511 * Returns: 0 on success, < 0 on failure
2513 int genphy_soft_reset(struct phy_device *phydev)
2515 u16 res = BMCR_RESET;
2518 if (phydev->autoneg == AUTONEG_ENABLE)
2519 res |= BMCR_ANRESTART;
2521 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2525 /* Clause 22 states that setting bit BMCR_RESET sets control registers
2526 * to their default value. Therefore the POWER DOWN bit is supposed to
2527 * be cleared after soft reset.
2529 phydev->suspended = 0;
2531 ret = phy_poll_reset(phydev);
2535 /* BMCR may be reset to defaults */
2536 if (phydev->autoneg == AUTONEG_DISABLE)
2537 ret = genphy_setup_forced(phydev);
2541 EXPORT_SYMBOL(genphy_soft_reset);
2543 irqreturn_t genphy_handle_interrupt_no_ack(struct phy_device *phydev)
2545 /* It seems there are cases where the interrupts are handled by another
2546 * entity (ie an IRQ controller embedded inside the PHY) and do not
2547 * need any other interraction from phylib. In this case, just trigger
2548 * the state machine directly.
2550 phy_trigger_machine(phydev);
2554 EXPORT_SYMBOL(genphy_handle_interrupt_no_ack);
2557 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2558 * @phydev: target phy_device struct
2560 * Description: Reads the PHY's abilities and populates
2561 * phydev->supported accordingly.
2563 * Returns: 0 on success, < 0 on failure
2565 int genphy_read_abilities(struct phy_device *phydev)
2569 linkmode_set_bit_array(phy_basic_ports_array,
2570 ARRAY_SIZE(phy_basic_ports_array),
2573 val = phy_read(phydev, MII_BMSR);
2577 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2578 val & BMSR_ANEGCAPABLE);
2580 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2581 val & BMSR_100FULL);
2582 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2583 val & BMSR_100HALF);
2584 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2586 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2589 if (val & BMSR_ESTATEN) {
2590 val = phy_read(phydev, MII_ESTATUS);
2594 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2595 phydev->supported, val & ESTATUS_1000_TFULL);
2596 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2597 phydev->supported, val & ESTATUS_1000_THALF);
2598 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2599 phydev->supported, val & ESTATUS_1000_XFULL);
2604 EXPORT_SYMBOL(genphy_read_abilities);
2606 /* This is used for the phy device which doesn't support the MMD extended
2607 * register access, but it does have side effect when we are trying to access
2608 * the MMD register via indirect method.
2610 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2614 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2616 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2617 u16 regnum, u16 val)
2621 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2623 int genphy_suspend(struct phy_device *phydev)
2625 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2627 EXPORT_SYMBOL(genphy_suspend);
2629 int genphy_resume(struct phy_device *phydev)
2631 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2633 EXPORT_SYMBOL(genphy_resume);
2635 int genphy_loopback(struct phy_device *phydev, bool enable)
2638 u16 val, ctl = BMCR_LOOPBACK;
2641 if (phydev->speed == SPEED_1000)
2642 ctl |= BMCR_SPEED1000;
2643 else if (phydev->speed == SPEED_100)
2644 ctl |= BMCR_SPEED100;
2646 if (phydev->duplex == DUPLEX_FULL)
2647 ctl |= BMCR_FULLDPLX;
2649 phy_modify(phydev, MII_BMCR, ~0, ctl);
2651 ret = phy_read_poll_timeout(phydev, MII_BMSR, val,
2653 5000, 500000, true);
2657 phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK, 0);
2659 phy_config_aneg(phydev);
2664 EXPORT_SYMBOL(genphy_loopback);
2667 * phy_remove_link_mode - Remove a supported link mode
2668 * @phydev: phy_device structure to remove link mode from
2669 * @link_mode: Link mode to be removed
2671 * Description: Some MACs don't support all link modes which the PHY
2672 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2673 * to remove a link mode.
2675 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2677 linkmode_clear_bit(link_mode, phydev->supported);
2678 phy_advertise_supported(phydev);
2680 EXPORT_SYMBOL(phy_remove_link_mode);
2682 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2684 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2685 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2686 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2687 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2691 * phy_advertise_supported - Advertise all supported modes
2692 * @phydev: target phy_device struct
2694 * Description: Called to advertise all supported modes, doesn't touch
2695 * pause mode advertising.
2697 void phy_advertise_supported(struct phy_device *phydev)
2699 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2701 linkmode_copy(new, phydev->supported);
2702 phy_copy_pause_bits(new, phydev->advertising);
2703 linkmode_copy(phydev->advertising, new);
2705 EXPORT_SYMBOL(phy_advertise_supported);
2708 * phy_support_sym_pause - Enable support of symmetrical pause
2709 * @phydev: target phy_device struct
2711 * Description: Called by the MAC to indicate is supports symmetrical
2712 * Pause, but not asym pause.
2714 void phy_support_sym_pause(struct phy_device *phydev)
2716 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
2717 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2719 EXPORT_SYMBOL(phy_support_sym_pause);
2722 * phy_support_asym_pause - Enable support of asym pause
2723 * @phydev: target phy_device struct
2725 * Description: Called by the MAC to indicate is supports Asym Pause.
2727 void phy_support_asym_pause(struct phy_device *phydev)
2729 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2731 EXPORT_SYMBOL(phy_support_asym_pause);
2734 * phy_set_sym_pause - Configure symmetric Pause
2735 * @phydev: target phy_device struct
2736 * @rx: Receiver Pause is supported
2737 * @tx: Transmit Pause is supported
2738 * @autoneg: Auto neg should be used
2740 * Description: Configure advertised Pause support depending on if
2741 * receiver pause and pause auto neg is supported. Generally called
2742 * from the set_pauseparam .ndo.
2744 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
2747 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
2749 if (rx && tx && autoneg)
2750 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2753 linkmode_copy(phydev->advertising, phydev->supported);
2755 EXPORT_SYMBOL(phy_set_sym_pause);
2758 * phy_set_asym_pause - Configure Pause and Asym Pause
2759 * @phydev: target phy_device struct
2760 * @rx: Receiver Pause is supported
2761 * @tx: Transmit Pause is supported
2763 * Description: Configure advertised Pause support depending on if
2764 * transmit and receiver pause is supported. If there has been a
2765 * change in adverting, trigger a new autoneg. Generally called from
2766 * the set_pauseparam .ndo.
2768 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
2770 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
2772 linkmode_copy(oldadv, phydev->advertising);
2773 linkmode_set_pause(phydev->advertising, tx, rx);
2775 if (!linkmode_equal(oldadv, phydev->advertising) &&
2777 phy_start_aneg(phydev);
2779 EXPORT_SYMBOL(phy_set_asym_pause);
2782 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
2783 * @phydev: phy_device struct
2784 * @pp: requested pause configuration
2786 * Description: Test if the PHY/MAC combination supports the Pause
2787 * configuration the user is requesting. Returns True if it is
2788 * supported, false otherwise.
2790 bool phy_validate_pause(struct phy_device *phydev,
2791 struct ethtool_pauseparam *pp)
2793 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2794 phydev->supported) && pp->rx_pause)
2797 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2798 phydev->supported) &&
2799 pp->rx_pause != pp->tx_pause)
2804 EXPORT_SYMBOL(phy_validate_pause);
2807 * phy_get_pause - resolve negotiated pause modes
2808 * @phydev: phy_device struct
2809 * @tx_pause: pointer to bool to indicate whether transmit pause should be
2811 * @rx_pause: pointer to bool to indicate whether receive pause should be
2814 * Resolve and return the flow control modes according to the negotiation
2815 * result. This includes checking that we are operating in full duplex mode.
2816 * See linkmode_resolve_pause() for further details.
2818 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
2820 if (phydev->duplex != DUPLEX_FULL) {
2826 return linkmode_resolve_pause(phydev->advertising,
2827 phydev->lp_advertising,
2828 tx_pause, rx_pause);
2830 EXPORT_SYMBOL(phy_get_pause);
2832 #if IS_ENABLED(CONFIG_OF_MDIO)
2833 static int phy_get_int_delay_property(struct device *dev, const char *name)
2838 ret = device_property_read_u32(dev, name, &int_delay);
2845 static int phy_get_int_delay_property(struct device *dev, const char *name)
2852 * phy_get_internal_delay - returns the index of the internal delay
2853 * @phydev: phy_device struct
2854 * @dev: pointer to the devices device struct
2855 * @delay_values: array of delays the PHY supports
2856 * @size: the size of the delay array
2857 * @is_rx: boolean to indicate to get the rx internal delay
2859 * Returns the index within the array of internal delay passed in.
2860 * If the device property is not present then the interface type is checked
2861 * if the interface defines use of internal delay then a 1 is returned otherwise
2863 * The array must be in ascending order. If PHY does not have an ascending order
2864 * array then size = 0 and the value of the delay property is returned.
2865 * Return -EINVAL if the delay is invalid or cannot be found.
2867 s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
2868 const int *delay_values, int size, bool is_rx)
2874 delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
2875 if (delay < 0 && size == 0) {
2876 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2877 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
2884 delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
2885 if (delay < 0 && size == 0) {
2886 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
2887 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
2897 if (delay && size == 0)
2900 if (delay < delay_values[0] || delay > delay_values[size - 1]) {
2901 phydev_err(phydev, "Delay %d is out of range\n", delay);
2905 if (delay == delay_values[0])
2908 for (i = 1; i < size; i++) {
2909 if (delay == delay_values[i])
2912 /* Find an approximate index by looking up the table */
2913 if (delay > delay_values[i - 1] &&
2914 delay < delay_values[i]) {
2915 if (delay - delay_values[i - 1] <
2916 delay_values[i] - delay)
2923 phydev_err(phydev, "error finding internal delay index for %d\n",
2928 EXPORT_SYMBOL(phy_get_internal_delay);
2930 static bool phy_drv_supports_irq(struct phy_driver *phydrv)
2932 return phydrv->config_intr && phydrv->handle_interrupt;
2936 * fwnode_mdio_find_device - Given a fwnode, find the mdio_device
2937 * @fwnode: pointer to the mdio_device's fwnode
2939 * If successful, returns a pointer to the mdio_device with the embedded
2940 * struct device refcount incremented by one, or NULL on failure.
2941 * The caller should call put_device() on the mdio_device after its use.
2943 struct mdio_device *fwnode_mdio_find_device(struct fwnode_handle *fwnode)
2950 d = bus_find_device_by_fwnode(&mdio_bus_type, fwnode);
2954 return to_mdio_device(d);
2956 EXPORT_SYMBOL(fwnode_mdio_find_device);
2959 * fwnode_phy_find_device - For provided phy_fwnode, find phy_device.
2961 * @phy_fwnode: Pointer to the phy's fwnode.
2963 * If successful, returns a pointer to the phy_device with the embedded
2964 * struct device refcount incremented by one, or NULL on failure.
2966 struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode)
2968 struct mdio_device *mdiodev;
2970 mdiodev = fwnode_mdio_find_device(phy_fwnode);
2974 if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY)
2975 return to_phy_device(&mdiodev->dev);
2977 put_device(&mdiodev->dev);
2981 EXPORT_SYMBOL(fwnode_phy_find_device);
2984 * device_phy_find_device - For the given device, get the phy_device
2985 * @dev: Pointer to the given device
2987 * Refer return conditions of fwnode_phy_find_device().
2989 struct phy_device *device_phy_find_device(struct device *dev)
2991 return fwnode_phy_find_device(dev_fwnode(dev));
2993 EXPORT_SYMBOL_GPL(device_phy_find_device);
2996 * fwnode_get_phy_node - Get the phy_node using the named reference.
2997 * @fwnode: Pointer to fwnode from which phy_node has to be obtained.
2999 * Refer return conditions of fwnode_find_reference().
3000 * For ACPI, only "phy-handle" is supported. Legacy DT properties "phy"
3001 * and "phy-device" are not supported in ACPI. DT supports all the three
3002 * named references to the phy node.
3004 struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
3006 struct fwnode_handle *phy_node;
3008 /* Only phy-handle is used for ACPI */
3009 phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
3010 if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
3012 phy_node = fwnode_find_reference(fwnode, "phy", 0);
3013 if (IS_ERR(phy_node))
3014 phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
3017 EXPORT_SYMBOL_GPL(fwnode_get_phy_node);
3020 * phy_probe - probe and init a PHY device
3021 * @dev: device to probe and init
3023 * Description: Take care of setting up the phy_device structure,
3024 * set the state to READY (the driver's init function should
3025 * set it to STARTING if needed).
3027 static int phy_probe(struct device *dev)
3029 struct phy_device *phydev = to_phy_device(dev);
3030 struct device_driver *drv = phydev->mdio.dev.driver;
3031 struct phy_driver *phydrv = to_phy_driver(drv);
3034 phydev->drv = phydrv;
3036 /* Disable the interrupt if the PHY doesn't support it
3037 * but the interrupt is still a valid one
3039 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
3040 phydev->irq = PHY_POLL;
3042 if (phydrv->flags & PHY_IS_INTERNAL)
3043 phydev->is_internal = true;
3045 mutex_lock(&phydev->lock);
3047 /* Deassert the reset signal */
3048 phy_device_reset(phydev, 0);
3050 if (phydev->drv->probe) {
3051 err = phydev->drv->probe(phydev);
3056 /* Start out supporting everything. Eventually,
3057 * a controller will attach, and may modify one
3058 * or both of these values
3060 if (phydrv->features)
3061 linkmode_copy(phydev->supported, phydrv->features);
3062 else if (phydrv->get_features)
3063 err = phydrv->get_features(phydev);
3064 else if (phydev->is_c45)
3065 err = genphy_c45_pma_read_abilities(phydev);
3067 err = genphy_read_abilities(phydev);
3072 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
3074 phydev->autoneg = 0;
3076 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
3078 phydev->is_gigabit_capable = 1;
3079 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
3081 phydev->is_gigabit_capable = 1;
3083 of_set_phy_supported(phydev);
3084 phy_advertise_supported(phydev);
3086 /* Get the EEE modes we want to prohibit. We will ask
3087 * the PHY stop advertising these mode later on
3089 of_set_phy_eee_broken(phydev);
3091 /* The Pause Frame bits indicate that the PHY can support passing
3092 * pause frames. During autonegotiation, the PHYs will determine if
3093 * they should allow pause frames to pass. The MAC driver should then
3094 * use that result to determine whether to enable flow control via
3097 * Normally, PHY drivers should not set the Pause bits, and instead
3098 * allow phylib to do that. However, there may be some situations
3099 * (e.g. hardware erratum) where the driver wants to set only one
3102 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
3103 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
3104 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
3106 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
3110 /* Set the state to READY by default */
3111 phydev->state = PHY_READY;
3114 /* Assert the reset signal */
3116 phy_device_reset(phydev, 1);
3118 mutex_unlock(&phydev->lock);
3123 static int phy_remove(struct device *dev)
3125 struct phy_device *phydev = to_phy_device(dev);
3127 cancel_delayed_work_sync(&phydev->state_queue);
3129 mutex_lock(&phydev->lock);
3130 phydev->state = PHY_DOWN;
3131 mutex_unlock(&phydev->lock);
3133 sfp_bus_del_upstream(phydev->sfp_bus);
3134 phydev->sfp_bus = NULL;
3136 if (phydev->drv && phydev->drv->remove)
3137 phydev->drv->remove(phydev);
3139 /* Assert the reset signal */
3140 phy_device_reset(phydev, 1);
3147 static void phy_shutdown(struct device *dev)
3149 struct phy_device *phydev = to_phy_device(dev);
3151 if (phydev->state == PHY_READY || !phydev->attached_dev)
3154 phy_disable_interrupts(phydev);
3158 * phy_driver_register - register a phy_driver with the PHY layer
3159 * @new_driver: new phy_driver to register
3160 * @owner: module owning this PHY
3162 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
3166 /* Either the features are hard coded, or dynamically
3167 * determined. It cannot be both.
3169 if (WARN_ON(new_driver->features && new_driver->get_features)) {
3170 pr_err("%s: features and get_features must not both be set\n",
3175 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
3176 new_driver->mdiodrv.driver.name = new_driver->name;
3177 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
3178 new_driver->mdiodrv.driver.probe = phy_probe;
3179 new_driver->mdiodrv.driver.remove = phy_remove;
3180 new_driver->mdiodrv.driver.shutdown = phy_shutdown;
3181 new_driver->mdiodrv.driver.owner = owner;
3182 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
3184 retval = driver_register(&new_driver->mdiodrv.driver);
3186 pr_err("%s: Error %d in registering driver\n",
3187 new_driver->name, retval);
3192 pr_debug("%s: Registered new driver\n", new_driver->name);
3196 EXPORT_SYMBOL(phy_driver_register);
3198 int phy_drivers_register(struct phy_driver *new_driver, int n,
3199 struct module *owner)
3203 for (i = 0; i < n; i++) {
3204 ret = phy_driver_register(new_driver + i, owner);
3207 phy_driver_unregister(new_driver + i);
3213 EXPORT_SYMBOL(phy_drivers_register);
3215 void phy_driver_unregister(struct phy_driver *drv)
3217 driver_unregister(&drv->mdiodrv.driver);
3219 EXPORT_SYMBOL(phy_driver_unregister);
3221 void phy_drivers_unregister(struct phy_driver *drv, int n)
3225 for (i = 0; i < n; i++)
3226 phy_driver_unregister(drv + i);
3228 EXPORT_SYMBOL(phy_drivers_unregister);
3230 static struct phy_driver genphy_driver = {
3231 .phy_id = 0xffffffff,
3232 .phy_id_mask = 0xffffffff,
3233 .name = "Generic PHY",
3234 .get_features = genphy_read_abilities,
3235 .suspend = genphy_suspend,
3236 .resume = genphy_resume,
3237 .set_loopback = genphy_loopback,
3240 static const struct ethtool_phy_ops phy_ethtool_phy_ops = {
3241 .get_sset_count = phy_ethtool_get_sset_count,
3242 .get_strings = phy_ethtool_get_strings,
3243 .get_stats = phy_ethtool_get_stats,
3244 .start_cable_test = phy_start_cable_test,
3245 .start_cable_test_tdr = phy_start_cable_test_tdr,
3248 static int __init phy_init(void)
3252 rc = mdio_bus_init();
3256 ethtool_set_ethtool_phy_ops(&phy_ethtool_phy_ops);
3259 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
3263 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
3265 phy_driver_unregister(&genphy_c45_driver);
3273 static void __exit phy_exit(void)
3275 phy_driver_unregister(&genphy_c45_driver);
3276 phy_driver_unregister(&genphy_driver);
3278 ethtool_set_ethtool_phy_ops(NULL);
3281 subsys_initcall(phy_init);
3282 module_exit(phy_exit);