1 /* Framework for finding and configuring PHYs.
2 * Also contains generic PHY driver
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17 #include <linux/kernel.h>
18 #include <linux/string.h>
19 #include <linux/errno.h>
20 #include <linux/unistd.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/skbuff.h>
29 #include <linux/module.h>
30 #include <linux/mii.h>
31 #include <linux/ethtool.h>
32 #include <linux/phy.h>
33 #include <linux/phy_led_triggers.h>
34 #include <linux/mdio.h>
36 #include <linux/uaccess.h>
41 MODULE_DESCRIPTION("PHY library");
42 MODULE_AUTHOR("Andy Fleming");
43 MODULE_LICENSE("GPL");
45 void phy_device_free(struct phy_device *phydev)
47 put_device(&phydev->mdio.dev);
49 EXPORT_SYMBOL(phy_device_free);
51 static void phy_mdio_device_free(struct mdio_device *mdiodev)
53 struct phy_device *phydev;
55 phydev = container_of(mdiodev, struct phy_device, mdio);
56 phy_device_free(phydev);
59 static void phy_device_release(struct device *dev)
61 kfree(to_phy_device(dev));
64 static void phy_mdio_device_remove(struct mdio_device *mdiodev)
66 struct phy_device *phydev;
68 phydev = container_of(mdiodev, struct phy_device, mdio);
69 phy_device_remove(phydev);
72 static struct phy_driver genphy_driver;
73 extern struct phy_driver genphy_10g_driver;
75 static LIST_HEAD(phy_fixup_list);
76 static DEFINE_MUTEX(phy_fixup_lock);
79 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
81 struct device_driver *drv = phydev->mdio.dev.driver;
82 struct phy_driver *phydrv = to_phy_driver(drv);
83 struct net_device *netdev = phydev->attached_dev;
85 if (!drv || !phydrv->suspend)
88 /* PHY not attached? May suspend if the PHY has not already been
89 * suspended as part of a prior call to phy_disconnect() ->
90 * phy_detach() -> phy_suspend() because the parent netdev might be the
91 * MDIO bus driver and clock gated at this point.
96 /* Don't suspend PHY if the attached netdev parent may wakeup.
97 * The parent may point to a PCI device, as in tg3 driver.
99 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
102 /* Also don't suspend PHY if the netdev itself may wakeup. This
103 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
106 if (device_may_wakeup(&netdev->dev))
110 return !phydev->suspended;
113 static int mdio_bus_phy_suspend(struct device *dev)
115 struct phy_device *phydev = to_phy_device(dev);
117 /* We must stop the state machine manually, otherwise it stops out of
118 * control, possibly with the phydev->lock held. Upon resume, netdev
119 * may call phy routines that try to grab the same lock, and that may
120 * lead to a deadlock.
122 if (phydev->attached_dev && phydev->adjust_link)
123 phy_stop_machine(phydev);
125 if (!mdio_bus_phy_may_suspend(phydev))
128 phydev->suspended_by_mdio_bus = true;
130 return phy_suspend(phydev);
133 static int mdio_bus_phy_resume(struct device *dev)
135 struct phy_device *phydev = to_phy_device(dev);
138 if (!phydev->suspended_by_mdio_bus)
141 phydev->suspended_by_mdio_bus = false;
143 ret = phy_resume(phydev);
148 if (phydev->attached_dev && phydev->adjust_link)
149 phy_start_machine(phydev);
154 static int mdio_bus_phy_restore(struct device *dev)
156 struct phy_device *phydev = to_phy_device(dev);
157 struct net_device *netdev = phydev->attached_dev;
163 ret = phy_init_hw(phydev);
167 if (phydev->attached_dev && phydev->adjust_link)
168 phy_start_machine(phydev);
173 static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
174 .suspend = mdio_bus_phy_suspend,
175 .resume = mdio_bus_phy_resume,
176 .freeze = mdio_bus_phy_suspend,
177 .thaw = mdio_bus_phy_resume,
178 .restore = mdio_bus_phy_restore,
181 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
185 #define MDIO_BUS_PHY_PM_OPS NULL
187 #endif /* CONFIG_PM */
190 * phy_register_fixup - creates a new phy_fixup and adds it to the list
191 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
192 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
193 * It can also be PHY_ANY_UID
194 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
196 * @run: The actual code to be run when a matching PHY is found
198 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
199 int (*run)(struct phy_device *))
201 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
206 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
207 fixup->phy_uid = phy_uid;
208 fixup->phy_uid_mask = phy_uid_mask;
211 mutex_lock(&phy_fixup_lock);
212 list_add_tail(&fixup->list, &phy_fixup_list);
213 mutex_unlock(&phy_fixup_lock);
217 EXPORT_SYMBOL(phy_register_fixup);
219 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
220 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
221 int (*run)(struct phy_device *))
223 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
225 EXPORT_SYMBOL(phy_register_fixup_for_uid);
227 /* Registers a fixup to be run on the PHY with id string bus_id */
228 int phy_register_fixup_for_id(const char *bus_id,
229 int (*run)(struct phy_device *))
231 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
233 EXPORT_SYMBOL(phy_register_fixup_for_id);
236 * phy_unregister_fixup - remove a phy_fixup from the list
237 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
238 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
239 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
241 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
243 struct list_head *pos, *n;
244 struct phy_fixup *fixup;
249 mutex_lock(&phy_fixup_lock);
250 list_for_each_safe(pos, n, &phy_fixup_list) {
251 fixup = list_entry(pos, struct phy_fixup, list);
253 if ((!strcmp(fixup->bus_id, bus_id)) &&
254 ((fixup->phy_uid & phy_uid_mask) ==
255 (phy_uid & phy_uid_mask))) {
256 list_del(&fixup->list);
262 mutex_unlock(&phy_fixup_lock);
266 EXPORT_SYMBOL(phy_unregister_fixup);
268 /* Unregisters a fixup of any PHY with the UID in phy_uid */
269 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
271 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
273 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
275 /* Unregisters a fixup of the PHY with id string bus_id */
276 int phy_unregister_fixup_for_id(const char *bus_id)
278 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
280 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
282 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
283 * Fixups can be set to match any in one or more fields.
285 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
287 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
288 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
291 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
292 (phydev->phy_id & fixup->phy_uid_mask))
293 if (fixup->phy_uid != PHY_ANY_UID)
299 /* Runs any matching fixups for this phydev */
300 static int phy_scan_fixups(struct phy_device *phydev)
302 struct phy_fixup *fixup;
304 mutex_lock(&phy_fixup_lock);
305 list_for_each_entry(fixup, &phy_fixup_list, list) {
306 if (phy_needs_fixup(phydev, fixup)) {
307 int err = fixup->run(phydev);
310 mutex_unlock(&phy_fixup_lock);
313 phydev->has_fixups = true;
316 mutex_unlock(&phy_fixup_lock);
321 static int phy_bus_match(struct device *dev, struct device_driver *drv)
323 struct phy_device *phydev = to_phy_device(dev);
324 struct phy_driver *phydrv = to_phy_driver(drv);
325 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
328 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
331 if (phydrv->match_phy_device)
332 return phydrv->match_phy_device(phydev);
334 if (phydev->is_c45) {
335 for (i = 1; i < num_ids; i++) {
336 if (!(phydev->c45_ids.devices_in_package & (1 << i)))
339 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
340 (phydev->c45_ids.device_ids[i] &
341 phydrv->phy_id_mask))
346 return (phydrv->phy_id & phydrv->phy_id_mask) ==
347 (phydev->phy_id & phydrv->phy_id_mask);
351 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
353 struct phy_c45_device_ids *c45_ids)
355 struct phy_device *dev;
356 struct mdio_device *mdiodev;
358 /* We allocate the device, and initialize the default values */
359 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
361 return ERR_PTR(-ENOMEM);
363 mdiodev = &dev->mdio;
364 mdiodev->dev.release = phy_device_release;
365 mdiodev->dev.parent = &bus->dev;
366 mdiodev->dev.bus = &mdio_bus_type;
368 mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS;
369 mdiodev->bus_match = phy_bus_match;
370 mdiodev->addr = addr;
371 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
372 mdiodev->device_free = phy_mdio_device_free;
373 mdiodev->device_remove = phy_mdio_device_remove;
375 dev->speed = SPEED_UNKNOWN;
376 dev->duplex = DUPLEX_UNKNOWN;
380 dev->interface = PHY_INTERFACE_MODE_GMII;
382 dev->autoneg = AUTONEG_ENABLE;
384 dev->is_c45 = is_c45;
385 dev->phy_id = phy_id;
387 dev->c45_ids = *c45_ids;
388 dev->irq = bus->irq[addr];
389 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
391 dev->state = PHY_DOWN;
393 mutex_init(&dev->lock);
394 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
395 INIT_WORK(&dev->phy_queue, phy_change_work);
397 /* Request the appropriate module unconditionally; don't
398 * bother trying to do so only if it isn't already loaded,
399 * because that gets complicated. A hotplug event would have
400 * done an unconditional modprobe anyway.
401 * We don't do normal hotplug because it won't work for MDIO
402 * -- because it relies on the device staying around for long
403 * enough for the driver to get loaded. With MDIO, the NIC
404 * driver will get bored and give up as soon as it finds that
405 * there's no driver _already_ loaded.
407 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
409 device_initialize(&mdiodev->dev);
413 EXPORT_SYMBOL(phy_device_create);
415 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
416 * @bus: the target MII bus
417 * @addr: PHY address on the MII bus
418 * @dev_addr: MMD address in the PHY.
419 * @devices_in_package: where to store the devices in package information.
421 * Description: reads devices in package registers of a MMD at @dev_addr
422 * from PHY at @addr on @bus.
424 * Returns: 0 on success, -EIO on failure.
426 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
427 u32 *devices_in_package)
429 int phy_reg, reg_addr;
431 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
432 phy_reg = mdiobus_read(bus, addr, reg_addr);
435 *devices_in_package = (phy_reg & 0xffff) << 16;
437 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
438 phy_reg = mdiobus_read(bus, addr, reg_addr);
441 *devices_in_package |= (phy_reg & 0xffff);
447 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
448 * @bus: the target MII bus
449 * @addr: PHY address on the MII bus
450 * @phy_id: where to store the ID retrieved.
451 * @c45_ids: where to store the c45 ID information.
453 * If the PHY devices-in-package appears to be valid, it and the
454 * corresponding identifiers are stored in @c45_ids, zero is stored
455 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
459 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
460 struct phy_c45_device_ids *c45_ids) {
463 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
464 u32 *devs = &c45_ids->devices_in_package;
466 /* Find first non-zero Devices In package. Device zero is reserved
467 * for 802.3 c45 complied PHYs, so don't probe it at first.
469 for (i = 1; i < num_ids && *devs == 0; i++) {
470 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
474 if ((*devs & 0x1fffffff) == 0x1fffffff) {
475 /* If mostly Fs, there is no device there,
476 * then let's continue to probe more, as some
477 * 10G PHYs have zero Devices In package,
478 * e.g. Cortina CS4315/CS4340 PHY.
480 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
483 /* no device there, let's get out of here */
484 if ((*devs & 0x1fffffff) == 0x1fffffff) {
485 *phy_id = 0xffffffff;
493 /* Now probe Device Identifiers for each device present. */
494 for (i = 1; i < num_ids; i++) {
495 if (!(c45_ids->devices_in_package & (1 << i)))
498 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
499 phy_reg = mdiobus_read(bus, addr, reg_addr);
502 c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
504 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
505 phy_reg = mdiobus_read(bus, addr, reg_addr);
508 c45_ids->device_ids[i] |= (phy_reg & 0xffff);
515 * get_phy_id - reads the specified addr for its ID.
516 * @bus: the target MII bus
517 * @addr: PHY address on the MII bus
518 * @phy_id: where to store the ID retrieved.
519 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
520 * @c45_ids: where to store the c45 ID information.
522 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
523 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
526 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
527 * its return value is in turn returned.
530 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
531 bool is_c45, struct phy_c45_device_ids *c45_ids)
536 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
538 /* Grab the bits from PHYIR1, and put them in the upper half */
539 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
543 *phy_id = (phy_reg & 0xffff) << 16;
545 /* Grab the bits from PHYIR2, and put them in the lower half */
546 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
550 *phy_id |= (phy_reg & 0xffff);
556 * get_phy_device - reads the specified PHY device and returns its @phy_device
558 * @bus: the target MII bus
559 * @addr: PHY address on the MII bus
560 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
562 * Description: Reads the ID registers of the PHY at @addr on the
563 * @bus, then allocates and returns the phy_device to represent it.
565 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
567 struct phy_c45_device_ids c45_ids = {0};
571 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
575 /* If the phy_id is mostly Fs, there is no device there */
576 if ((phy_id & 0x1fffffff) == 0x1fffffff)
577 return ERR_PTR(-ENODEV);
579 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
581 EXPORT_SYMBOL(get_phy_device);
584 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
586 struct phy_device *phydev = to_phy_device(dev);
588 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
590 static DEVICE_ATTR_RO(phy_id);
593 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
595 struct phy_device *phydev = to_phy_device(dev);
596 const char *mode = NULL;
598 if (phy_is_internal(phydev))
601 mode = phy_modes(phydev->interface);
603 return sprintf(buf, "%s\n", mode);
605 static DEVICE_ATTR_RO(phy_interface);
608 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
611 struct phy_device *phydev = to_phy_device(dev);
613 return sprintf(buf, "%d\n", phydev->has_fixups);
615 static DEVICE_ATTR_RO(phy_has_fixups);
617 static struct attribute *phy_dev_attrs[] = {
618 &dev_attr_phy_id.attr,
619 &dev_attr_phy_interface.attr,
620 &dev_attr_phy_has_fixups.attr,
623 ATTRIBUTE_GROUPS(phy_dev);
626 * phy_device_register - Register the phy device on the MDIO bus
627 * @phydev: phy_device structure to be added to the MDIO bus
629 int phy_device_register(struct phy_device *phydev)
633 err = mdiobus_register_device(&phydev->mdio);
637 /* Run all of the fixups for this PHY */
638 err = phy_scan_fixups(phydev);
640 pr_err("PHY %d failed to initialize\n", phydev->mdio.addr);
644 phydev->mdio.dev.groups = phy_dev_groups;
646 err = device_add(&phydev->mdio.dev);
648 pr_err("PHY %d failed to add\n", phydev->mdio.addr);
655 mdiobus_unregister_device(&phydev->mdio);
658 EXPORT_SYMBOL(phy_device_register);
661 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
662 * @phydev: phy_device structure to remove
664 * This doesn't free the phy_device itself, it merely reverses the effects
665 * of phy_device_register(). Use phy_device_free() to free the device
666 * after calling this function.
668 void phy_device_remove(struct phy_device *phydev)
670 device_del(&phydev->mdio.dev);
671 mdiobus_unregister_device(&phydev->mdio);
673 EXPORT_SYMBOL(phy_device_remove);
676 * phy_find_first - finds the first PHY device on the bus
677 * @bus: the target MII bus
679 struct phy_device *phy_find_first(struct mii_bus *bus)
681 struct phy_device *phydev;
684 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
685 phydev = mdiobus_get_phy(bus, addr);
691 EXPORT_SYMBOL(phy_find_first);
693 static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
695 struct net_device *netdev = phydev->attached_dev;
699 netif_carrier_on(netdev);
701 netif_carrier_off(netdev);
703 phydev->adjust_link(netdev);
707 * phy_prepare_link - prepares the PHY layer to monitor link status
708 * @phydev: target phy_device struct
709 * @handler: callback function for link status change notifications
711 * Description: Tells the PHY infrastructure to handle the
712 * gory details on monitoring link status (whether through
713 * polling or an interrupt), and to call back to the
714 * connected device driver when the link status changes.
715 * If you want to monitor your own link state, don't call
718 static void phy_prepare_link(struct phy_device *phydev,
719 void (*handler)(struct net_device *))
721 phydev->adjust_link = handler;
725 * phy_connect_direct - connect an ethernet device to a specific phy_device
726 * @dev: the network device to connect
727 * @phydev: the pointer to the phy device
728 * @handler: callback function for state change notifications
729 * @interface: PHY device's interface
731 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
732 void (*handler)(struct net_device *),
733 phy_interface_t interface)
740 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
744 phy_prepare_link(phydev, handler);
745 phy_start_machine(phydev);
747 phy_start_interrupts(phydev);
751 EXPORT_SYMBOL(phy_connect_direct);
754 * phy_connect - connect an ethernet device to a PHY device
755 * @dev: the network device to connect
756 * @bus_id: the id string of the PHY device to connect
757 * @handler: callback function for state change notifications
758 * @interface: PHY device's interface
760 * Description: Convenience function for connecting ethernet
761 * devices to PHY devices. The default behavior is for
762 * the PHY infrastructure to handle everything, and only notify
763 * the connected driver when the link status changes. If you
764 * don't want, or can't use the provided functionality, you may
765 * choose to call only the subset of functions which provide
766 * the desired functionality.
768 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
769 void (*handler)(struct net_device *),
770 phy_interface_t interface)
772 struct phy_device *phydev;
776 /* Search the list of PHY devices on the mdio bus for the
777 * PHY with the requested name
779 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
781 pr_err("PHY %s not found\n", bus_id);
782 return ERR_PTR(-ENODEV);
784 phydev = to_phy_device(d);
786 rc = phy_connect_direct(dev, phydev, handler, interface);
793 EXPORT_SYMBOL(phy_connect);
796 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
798 * @phydev: target phy_device struct
800 void phy_disconnect(struct phy_device *phydev)
803 phy_stop_interrupts(phydev);
805 phy_stop_machine(phydev);
807 phydev->adjust_link = NULL;
811 EXPORT_SYMBOL(phy_disconnect);
814 * phy_poll_reset - Safely wait until a PHY reset has properly completed
815 * @phydev: The PHY device to poll
817 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
818 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
819 * register must be polled until the BMCR_RESET bit clears.
821 * Furthermore, any attempts to write to PHY registers may have no effect
822 * or even generate MDIO bus errors until this is complete.
824 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
825 * standard and do not fully reset after the BMCR_RESET bit is set, and may
826 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
827 * effort to support such broken PHYs, this function is separate from the
828 * standard phy_init_hw() which will zero all the other bits in the BMCR
829 * and reapply all driver-specific and board-specific fixups.
831 static int phy_poll_reset(struct phy_device *phydev)
833 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
834 unsigned int retries = 12;
839 ret = phy_read(phydev, MII_BMCR);
842 } while (ret & BMCR_RESET && --retries);
843 if (ret & BMCR_RESET)
846 /* Some chips (smsc911x) may still need up to another 1ms after the
847 * BMCR_RESET bit is cleared before they are usable.
853 int phy_init_hw(struct phy_device *phydev)
857 if (!phydev->drv || !phydev->drv->config_init)
860 if (phydev->drv->soft_reset)
861 ret = phydev->drv->soft_reset(phydev);
863 ret = genphy_soft_reset(phydev);
868 ret = phy_scan_fixups(phydev);
872 return phydev->drv->config_init(phydev);
874 EXPORT_SYMBOL(phy_init_hw);
876 void phy_attached_info(struct phy_device *phydev)
878 phy_attached_print(phydev, NULL);
880 EXPORT_SYMBOL(phy_attached_info);
882 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
883 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
885 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
889 switch(phydev->irq) {
893 case PHY_IGNORE_INTERRUPT:
897 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
904 dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n",
905 drv_name, phydev_name(phydev),
910 dev_info(&phydev->mdio.dev, ATTACHED_FMT,
911 drv_name, phydev_name(phydev),
919 EXPORT_SYMBOL(phy_attached_print);
922 * phy_attach_direct - attach a network device to a given PHY device pointer
923 * @dev: network device to attach
924 * @phydev: Pointer to phy_device to attach
925 * @flags: PHY device's dev_flags
926 * @interface: PHY device's interface
928 * Description: Called by drivers to attach to a particular PHY
929 * device. The phy_device is found, and properly hooked up
930 * to the phy_driver. If no driver is attached, then a
931 * generic driver is used. The phy_device is given a ptr to
932 * the attaching device, and given a callback for link status
933 * change. The phy_device is returned to the attaching driver.
934 * This function takes a reference on the phy device.
936 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
937 u32 flags, phy_interface_t interface)
939 struct module *ndev_owner = dev->dev.parent->driver->owner;
940 struct mii_bus *bus = phydev->mdio.bus;
941 struct device *d = &phydev->mdio.dev;
942 bool using_genphy = false;
945 /* For Ethernet device drivers that register their own MDIO bus, we
946 * will have bus->owner match ndev_mod, so we do not want to increment
947 * our own module->refcnt here, otherwise we would not be able to
950 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
951 dev_err(&dev->dev, "failed to get the bus module\n");
957 /* Assume that if there is no driver, that it doesn't
958 * exist, and we should use the genphy driver.
962 d->driver = &genphy_10g_driver.mdiodrv.driver;
964 d->driver = &genphy_driver.mdiodrv.driver;
969 if (!try_module_get(d->driver->owner)) {
970 dev_err(&dev->dev, "failed to get the device driver module\n");
972 goto error_put_device;
976 err = d->driver->probe(d);
978 err = device_bind_driver(d);
981 goto error_module_put;
984 if (phydev->attached_dev) {
985 dev_err(&dev->dev, "PHY already attached\n");
990 phydev->phy_link_change = phy_link_change;
991 phydev->attached_dev = dev;
992 dev->phydev = phydev;
994 /* Some Ethernet drivers try to connect to a PHY device before
995 * calling register_netdevice() -> netdev_register_kobject() and
996 * does the dev->dev.kobj initialization. Here we only check for
997 * success which indicates that the network device kobject is
998 * ready. Once we do that we still need to keep track of whether
999 * links were successfully set up or not for phy_detach() to
1000 * remove them accordingly.
1002 phydev->sysfs_links = false;
1004 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1007 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1008 &phydev->mdio.dev.kobj,
1011 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1012 kobject_name(&phydev->mdio.dev.kobj),
1014 /* non-fatal - some net drivers can use one netdevice
1015 * with more then one phy
1019 phydev->sysfs_links = true;
1022 phydev->dev_flags = flags;
1024 phydev->interface = interface;
1026 phydev->state = PHY_READY;
1028 /* Initial carrier state is off as the phy is about to be
1031 netif_carrier_off(phydev->attached_dev);
1033 /* Do initial configuration here, now that
1034 * we have certain key parameters
1035 * (dev_flags and interface)
1037 err = phy_init_hw(phydev);
1042 phy_led_triggers_register(phydev);
1047 /* phy_detach() does all of the cleanup below */
1052 module_put(d->driver->owner);
1055 if (ndev_owner != bus->owner)
1056 module_put(bus->owner);
1059 EXPORT_SYMBOL(phy_attach_direct);
1062 * phy_attach - attach a network device to a particular PHY device
1063 * @dev: network device to attach
1064 * @bus_id: Bus ID of PHY device to attach
1065 * @interface: PHY device's interface
1067 * Description: Same as phy_attach_direct() except that a PHY bus_id
1068 * string is passed instead of a pointer to a struct phy_device.
1070 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1071 phy_interface_t interface)
1073 struct bus_type *bus = &mdio_bus_type;
1074 struct phy_device *phydev;
1079 return ERR_PTR(-EINVAL);
1081 /* Search the list of PHY devices on the mdio bus for the
1082 * PHY with the requested name
1084 d = bus_find_device_by_name(bus, NULL, bus_id);
1086 pr_err("PHY %s not found\n", bus_id);
1087 return ERR_PTR(-ENODEV);
1089 phydev = to_phy_device(d);
1091 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1098 EXPORT_SYMBOL(phy_attach);
1101 * phy_detach - detach a PHY device from its network device
1102 * @phydev: target phy_device struct
1104 * This detaches the phy device from its network device and the phy
1105 * driver, and drops the reference count taken in phy_attach_direct().
1107 void phy_detach(struct phy_device *phydev)
1109 struct net_device *dev = phydev->attached_dev;
1110 struct module *ndev_owner = dev->dev.parent->driver->owner;
1111 struct mii_bus *bus;
1113 if (phydev->sysfs_links) {
1114 sysfs_remove_link(&dev->dev.kobj, "phydev");
1115 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1117 phydev->attached_dev->phydev = NULL;
1118 phydev->attached_dev = NULL;
1119 phy_suspend(phydev);
1120 phydev->phylink = NULL;
1122 phy_led_triggers_unregister(phydev);
1124 if (phydev->mdio.dev.driver)
1125 module_put(phydev->mdio.dev.driver->owner);
1127 /* If the device had no specific driver before (i.e. - it
1128 * was using the generic driver), we unbind the device
1129 * from the generic driver so that there's a chance a
1130 * real driver could be loaded
1132 if (phydev->mdio.dev.driver == &genphy_10g_driver.mdiodrv.driver ||
1133 phydev->mdio.dev.driver == &genphy_driver.mdiodrv.driver)
1134 device_release_driver(&phydev->mdio.dev);
1137 * The phydev might go away on the put_device() below, so avoid
1138 * a use-after-free bug by reading the underlying bus first.
1140 bus = phydev->mdio.bus;
1142 put_device(&phydev->mdio.dev);
1143 if (ndev_owner != bus->owner)
1144 module_put(bus->owner);
1146 EXPORT_SYMBOL(phy_detach);
1148 int phy_suspend(struct phy_device *phydev)
1150 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1151 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1154 /* If the device has WOL enabled, we cannot suspend the PHY */
1155 phy_ethtool_get_wol(phydev, &wol);
1159 if (phydev->drv && phydrv->suspend)
1160 ret = phydrv->suspend(phydev);
1165 phydev->suspended = true;
1169 EXPORT_SYMBOL(phy_suspend);
1171 int __phy_resume(struct phy_device *phydev)
1173 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1176 WARN_ON(!mutex_is_locked(&phydev->lock));
1178 if (phydev->drv && phydrv->resume)
1179 ret = phydrv->resume(phydev);
1184 phydev->suspended = false;
1188 EXPORT_SYMBOL(__phy_resume);
1190 int phy_resume(struct phy_device *phydev)
1194 mutex_lock(&phydev->lock);
1195 ret = __phy_resume(phydev);
1196 mutex_unlock(&phydev->lock);
1200 EXPORT_SYMBOL(phy_resume);
1202 int phy_loopback(struct phy_device *phydev, bool enable)
1204 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1207 mutex_lock(&phydev->lock);
1209 if (enable && phydev->loopback_enabled) {
1214 if (!enable && !phydev->loopback_enabled) {
1219 if (phydev->drv && phydrv->set_loopback)
1220 ret = phydrv->set_loopback(phydev, enable);
1227 phydev->loopback_enabled = enable;
1230 mutex_unlock(&phydev->lock);
1233 EXPORT_SYMBOL(phy_loopback);
1235 /* Generic PHY support and helper functions */
1238 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1239 * @phydev: target phy_device struct
1241 * Description: Writes MII_ADVERTISE with the appropriate values,
1242 * after sanitizing the values to make sure we only advertise
1243 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1244 * hasn't changed, and > 0 if it has changed.
1246 static int genphy_config_advert(struct phy_device *phydev)
1249 int oldadv, adv, bmsr;
1250 int err, changed = 0;
1252 /* Only allow advertising what this PHY supports */
1253 phydev->advertising &= phydev->supported;
1254 advertise = phydev->advertising;
1256 /* Setup standard advertisement */
1257 adv = phy_read(phydev, MII_ADVERTISE);
1262 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
1263 ADVERTISE_PAUSE_ASYM);
1264 adv |= ethtool_adv_to_mii_adv_t(advertise);
1266 if (adv != oldadv) {
1267 err = phy_write(phydev, MII_ADVERTISE, adv);
1274 bmsr = phy_read(phydev, MII_BMSR);
1278 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1279 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1282 if (!(bmsr & BMSR_ESTATEN))
1285 /* Configure gigabit if it's supported */
1286 adv = phy_read(phydev, MII_CTRL1000);
1291 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
1293 if (phydev->supported & (SUPPORTED_1000baseT_Half |
1294 SUPPORTED_1000baseT_Full)) {
1295 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
1301 err = phy_write(phydev, MII_CTRL1000, adv);
1309 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1310 * @phydev: target phy_device struct
1312 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1313 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1314 * changed, and 1 if it has changed.
1316 static int genphy_config_eee_advert(struct phy_device *phydev)
1318 int broken = phydev->eee_broken_modes;
1321 /* Nothing to disable */
1325 /* If the following call fails, we assume that EEE is not
1326 * supported by the phy. If we read 0, EEE is not advertised
1327 * In both case, we don't need to continue
1329 adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1336 /* Advertising remains unchanged with the broken mask */
1340 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1346 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1347 * @phydev: target phy_device struct
1349 * Description: Configures MII_BMCR to force speed/duplex
1350 * to the values in phydev. Assumes that the values are valid.
1351 * Please see phy_sanitize_settings().
1353 int genphy_setup_forced(struct phy_device *phydev)
1355 int ctl = phy_read(phydev, MII_BMCR);
1357 ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN;
1359 phydev->asym_pause = 0;
1361 if (SPEED_1000 == phydev->speed)
1362 ctl |= BMCR_SPEED1000;
1363 else if (SPEED_100 == phydev->speed)
1364 ctl |= BMCR_SPEED100;
1366 if (DUPLEX_FULL == phydev->duplex)
1367 ctl |= BMCR_FULLDPLX;
1369 return phy_write(phydev, MII_BMCR, ctl);
1371 EXPORT_SYMBOL(genphy_setup_forced);
1374 * genphy_restart_aneg - Enable and Restart Autonegotiation
1375 * @phydev: target phy_device struct
1377 int genphy_restart_aneg(struct phy_device *phydev)
1379 int ctl = phy_read(phydev, MII_BMCR);
1384 ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
1386 /* Don't isolate the PHY if we're negotiating */
1387 ctl &= ~BMCR_ISOLATE;
1389 return phy_write(phydev, MII_BMCR, ctl);
1391 EXPORT_SYMBOL(genphy_restart_aneg);
1394 * genphy_config_aneg - restart auto-negotiation or write BMCR
1395 * @phydev: target phy_device struct
1397 * Description: If auto-negotiation is enabled, we configure the
1398 * advertising, and then restart auto-negotiation. If it is not
1399 * enabled, then we write the BMCR.
1401 int genphy_config_aneg(struct phy_device *phydev)
1405 changed = genphy_config_eee_advert(phydev);
1407 if (AUTONEG_ENABLE != phydev->autoneg)
1408 return genphy_setup_forced(phydev);
1410 err = genphy_config_advert(phydev);
1411 if (err < 0) /* error */
1417 /* Advertisement hasn't changed, but maybe aneg was never on to
1418 * begin with? Or maybe phy was isolated?
1420 int ctl = phy_read(phydev, MII_BMCR);
1425 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1426 changed = 1; /* do restart aneg */
1429 /* Only restart aneg if we are advertising something different
1430 * than we were before.
1433 return genphy_restart_aneg(phydev);
1437 EXPORT_SYMBOL(genphy_config_aneg);
1440 * genphy_aneg_done - return auto-negotiation status
1441 * @phydev: target phy_device struct
1443 * Description: Reads the status register and returns 0 either if
1444 * auto-negotiation is incomplete, or if there was an error.
1445 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1447 int genphy_aneg_done(struct phy_device *phydev)
1449 int retval = phy_read(phydev, MII_BMSR);
1451 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1453 EXPORT_SYMBOL(genphy_aneg_done);
1456 * genphy_update_link - update link status in @phydev
1457 * @phydev: target phy_device struct
1459 * Description: Update the value in phydev->link to reflect the
1460 * current link value. In order to do this, we need to read
1461 * the status register twice, keeping the second value.
1463 int genphy_update_link(struct phy_device *phydev)
1467 /* Do a fake read */
1468 status = phy_read(phydev, MII_BMSR);
1472 /* Read link and autonegotiation status */
1473 status = phy_read(phydev, MII_BMSR);
1477 if ((status & BMSR_LSTATUS) == 0)
1484 EXPORT_SYMBOL(genphy_update_link);
1487 * genphy_read_status - check the link status and update current link state
1488 * @phydev: target phy_device struct
1490 * Description: Check the link, then figure out the current state
1491 * by comparing what we advertise with what the link partner
1492 * advertises. Start by checking the gigabit possibilities,
1493 * then move on to 10/100.
1495 int genphy_read_status(struct phy_device *phydev)
1502 int common_adv_gb = 0;
1504 /* Update the link, but return if there was an error */
1505 err = genphy_update_link(phydev);
1509 phydev->lp_advertising = 0;
1511 if (AUTONEG_ENABLE == phydev->autoneg) {
1512 if (phydev->supported & (SUPPORTED_1000baseT_Half
1513 | SUPPORTED_1000baseT_Full)) {
1514 lpagb = phy_read(phydev, MII_STAT1000);
1518 adv = phy_read(phydev, MII_CTRL1000);
1522 phydev->lp_advertising =
1523 mii_stat1000_to_ethtool_lpa_t(lpagb);
1524 common_adv_gb = lpagb & adv << 2;
1527 lpa = phy_read(phydev, MII_LPA);
1531 phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
1533 adv = phy_read(phydev, MII_ADVERTISE);
1537 common_adv = lpa & adv;
1539 phydev->speed = SPEED_10;
1540 phydev->duplex = DUPLEX_HALF;
1542 phydev->asym_pause = 0;
1544 if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) {
1545 phydev->speed = SPEED_1000;
1547 if (common_adv_gb & LPA_1000FULL)
1548 phydev->duplex = DUPLEX_FULL;
1549 } else if (common_adv & (LPA_100FULL | LPA_100HALF)) {
1550 phydev->speed = SPEED_100;
1552 if (common_adv & LPA_100FULL)
1553 phydev->duplex = DUPLEX_FULL;
1555 if (common_adv & LPA_10FULL)
1556 phydev->duplex = DUPLEX_FULL;
1558 if (phydev->duplex == DUPLEX_FULL) {
1559 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
1560 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
1563 int bmcr = phy_read(phydev, MII_BMCR);
1568 if (bmcr & BMCR_FULLDPLX)
1569 phydev->duplex = DUPLEX_FULL;
1571 phydev->duplex = DUPLEX_HALF;
1573 if (bmcr & BMCR_SPEED1000)
1574 phydev->speed = SPEED_1000;
1575 else if (bmcr & BMCR_SPEED100)
1576 phydev->speed = SPEED_100;
1578 phydev->speed = SPEED_10;
1581 phydev->asym_pause = 0;
1586 EXPORT_SYMBOL(genphy_read_status);
1589 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1590 * @phydev: target phy_device struct
1592 * Description: Perform a software PHY reset using the standard
1593 * BMCR_RESET bit and poll for the reset bit to be cleared.
1595 * Returns: 0 on success, < 0 on failure
1597 int genphy_soft_reset(struct phy_device *phydev)
1601 ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
1605 return phy_poll_reset(phydev);
1607 EXPORT_SYMBOL(genphy_soft_reset);
1609 int genphy_config_init(struct phy_device *phydev)
1614 features = (SUPPORTED_TP | SUPPORTED_MII
1615 | SUPPORTED_AUI | SUPPORTED_FIBRE |
1616 SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1618 /* Do we support autonegotiation? */
1619 val = phy_read(phydev, MII_BMSR);
1623 if (val & BMSR_ANEGCAPABLE)
1624 features |= SUPPORTED_Autoneg;
1626 if (val & BMSR_100FULL)
1627 features |= SUPPORTED_100baseT_Full;
1628 if (val & BMSR_100HALF)
1629 features |= SUPPORTED_100baseT_Half;
1630 if (val & BMSR_10FULL)
1631 features |= SUPPORTED_10baseT_Full;
1632 if (val & BMSR_10HALF)
1633 features |= SUPPORTED_10baseT_Half;
1635 if (val & BMSR_ESTATEN) {
1636 val = phy_read(phydev, MII_ESTATUS);
1640 if (val & ESTATUS_1000_TFULL)
1641 features |= SUPPORTED_1000baseT_Full;
1642 if (val & ESTATUS_1000_THALF)
1643 features |= SUPPORTED_1000baseT_Half;
1646 phydev->supported &= features;
1647 phydev->advertising &= features;
1651 EXPORT_SYMBOL(genphy_config_init);
1653 /* This is used for the phy device which doesn't support the MMD extended
1654 * register access, but it does have side effect when we are trying to access
1655 * the MMD register via indirect method.
1657 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
1661 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
1663 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
1664 u16 regnum, u16 val)
1668 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
1670 int genphy_suspend(struct phy_device *phydev)
1674 mutex_lock(&phydev->lock);
1676 value = phy_read(phydev, MII_BMCR);
1677 phy_write(phydev, MII_BMCR, value | BMCR_PDOWN);
1679 mutex_unlock(&phydev->lock);
1683 EXPORT_SYMBOL(genphy_suspend);
1685 int genphy_resume(struct phy_device *phydev)
1689 value = phy_read(phydev, MII_BMCR);
1690 phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN);
1694 EXPORT_SYMBOL(genphy_resume);
1696 int genphy_loopback(struct phy_device *phydev, bool enable)
1700 value = phy_read(phydev, MII_BMCR);
1705 value |= BMCR_LOOPBACK;
1707 value &= ~BMCR_LOOPBACK;
1709 return phy_write(phydev, MII_BMCR, value);
1711 EXPORT_SYMBOL(genphy_loopback);
1713 static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
1715 switch (max_speed) {
1717 phydev->supported &= ~PHY_100BT_FEATURES;
1720 phydev->supported &= ~PHY_1000BT_FEATURES;
1731 int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
1735 err = __set_phy_supported(phydev, max_speed);
1739 phydev->advertising = phydev->supported;
1743 EXPORT_SYMBOL(phy_set_max_speed);
1745 static void of_set_phy_supported(struct phy_device *phydev)
1747 struct device_node *node = phydev->mdio.dev.of_node;
1750 if (!IS_ENABLED(CONFIG_OF_MDIO))
1756 if (!of_property_read_u32(node, "max-speed", &max_speed))
1757 __set_phy_supported(phydev, max_speed);
1760 static void of_set_phy_eee_broken(struct phy_device *phydev)
1762 struct device_node *node = phydev->mdio.dev.of_node;
1765 if (!IS_ENABLED(CONFIG_OF_MDIO))
1771 if (of_property_read_bool(node, "eee-broken-100tx"))
1772 broken |= MDIO_EEE_100TX;
1773 if (of_property_read_bool(node, "eee-broken-1000t"))
1774 broken |= MDIO_EEE_1000T;
1775 if (of_property_read_bool(node, "eee-broken-10gt"))
1776 broken |= MDIO_EEE_10GT;
1777 if (of_property_read_bool(node, "eee-broken-1000kx"))
1778 broken |= MDIO_EEE_1000KX;
1779 if (of_property_read_bool(node, "eee-broken-10gkx4"))
1780 broken |= MDIO_EEE_10GKX4;
1781 if (of_property_read_bool(node, "eee-broken-10gkr"))
1782 broken |= MDIO_EEE_10GKR;
1784 phydev->eee_broken_modes = broken;
1788 * phy_probe - probe and init a PHY device
1789 * @dev: device to probe and init
1791 * Description: Take care of setting up the phy_device structure,
1792 * set the state to READY (the driver's init function should
1793 * set it to STARTING if needed).
1795 static int phy_probe(struct device *dev)
1797 struct phy_device *phydev = to_phy_device(dev);
1798 struct device_driver *drv = phydev->mdio.dev.driver;
1799 struct phy_driver *phydrv = to_phy_driver(drv);
1802 phydev->drv = phydrv;
1804 /* Disable the interrupt if the PHY doesn't support it
1805 * but the interrupt is still a valid one
1807 if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
1808 phy_interrupt_is_valid(phydev))
1809 phydev->irq = PHY_POLL;
1811 if (phydrv->flags & PHY_IS_INTERNAL)
1812 phydev->is_internal = true;
1814 mutex_lock(&phydev->lock);
1816 /* Start out supporting everything. Eventually,
1817 * a controller will attach, and may modify one
1818 * or both of these values
1820 phydev->supported = phydrv->features;
1821 of_set_phy_supported(phydev);
1822 phydev->advertising = phydev->supported;
1824 /* Get the EEE modes we want to prohibit. We will ask
1825 * the PHY stop advertising these mode later on
1827 of_set_phy_eee_broken(phydev);
1829 /* The Pause Frame bits indicate that the PHY can support passing
1830 * pause frames. During autonegotiation, the PHYs will determine if
1831 * they should allow pause frames to pass. The MAC driver should then
1832 * use that result to determine whether to enable flow control via
1835 * Normally, PHY drivers should not set the Pause bits, and instead
1836 * allow phylib to do that. However, there may be some situations
1837 * (e.g. hardware erratum) where the driver wants to set only one
1840 if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) {
1841 phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1842 phydev->supported |= phydrv->features &
1843 (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1845 phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
1848 /* Set the state to READY by default */
1849 phydev->state = PHY_READY;
1851 if (phydev->drv->probe)
1852 err = phydev->drv->probe(phydev);
1854 mutex_unlock(&phydev->lock);
1859 static int phy_remove(struct device *dev)
1861 struct phy_device *phydev = to_phy_device(dev);
1863 cancel_delayed_work_sync(&phydev->state_queue);
1865 mutex_lock(&phydev->lock);
1866 phydev->state = PHY_DOWN;
1867 mutex_unlock(&phydev->lock);
1869 if (phydev->drv && phydev->drv->remove)
1870 phydev->drv->remove(phydev);
1877 * phy_driver_register - register a phy_driver with the PHY layer
1878 * @new_driver: new phy_driver to register
1879 * @owner: module owning this PHY
1881 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
1885 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
1886 new_driver->mdiodrv.driver.name = new_driver->name;
1887 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
1888 new_driver->mdiodrv.driver.probe = phy_probe;
1889 new_driver->mdiodrv.driver.remove = phy_remove;
1890 new_driver->mdiodrv.driver.owner = owner;
1892 retval = driver_register(&new_driver->mdiodrv.driver);
1894 pr_err("%s: Error %d in registering driver\n",
1895 new_driver->name, retval);
1900 pr_debug("%s: Registered new driver\n", new_driver->name);
1904 EXPORT_SYMBOL(phy_driver_register);
1906 int phy_drivers_register(struct phy_driver *new_driver, int n,
1907 struct module *owner)
1911 for (i = 0; i < n; i++) {
1912 ret = phy_driver_register(new_driver + i, owner);
1915 phy_driver_unregister(new_driver + i);
1921 EXPORT_SYMBOL(phy_drivers_register);
1923 void phy_driver_unregister(struct phy_driver *drv)
1925 driver_unregister(&drv->mdiodrv.driver);
1927 EXPORT_SYMBOL(phy_driver_unregister);
1929 void phy_drivers_unregister(struct phy_driver *drv, int n)
1933 for (i = 0; i < n; i++)
1934 phy_driver_unregister(drv + i);
1936 EXPORT_SYMBOL(phy_drivers_unregister);
1938 static struct phy_driver genphy_driver = {
1939 .phy_id = 0xffffffff,
1940 .phy_id_mask = 0xffffffff,
1941 .name = "Generic PHY",
1942 .soft_reset = genphy_no_soft_reset,
1943 .config_init = genphy_config_init,
1944 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
1945 SUPPORTED_AUI | SUPPORTED_FIBRE |
1947 .config_aneg = genphy_config_aneg,
1948 .aneg_done = genphy_aneg_done,
1949 .read_status = genphy_read_status,
1950 .suspend = genphy_suspend,
1951 .resume = genphy_resume,
1952 .set_loopback = genphy_loopback,
1955 static int __init phy_init(void)
1959 rc = mdio_bus_init();
1963 rc = phy_driver_register(&genphy_10g_driver, THIS_MODULE);
1967 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
1969 phy_driver_unregister(&genphy_10g_driver);
1977 static void __exit phy_exit(void)
1979 phy_driver_unregister(&genphy_10g_driver);
1980 phy_driver_unregister(&genphy_driver);
1984 subsys_initcall(phy_init);
1985 module_exit(phy_exit);