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.
94 return !phydev->suspended;
96 if (netdev->wol_enabled)
99 /* As long as not all affected network drivers support the
100 * wol_enabled flag, let's check for hints that WoL is enabled.
101 * Don't suspend PHY if the attached netdev parent may wake up.
102 * The parent may point to a PCI device, as in tg3 driver.
104 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
107 /* Also don't suspend PHY if the netdev itself may wakeup. This
108 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
111 if (device_may_wakeup(&netdev->dev))
117 static int mdio_bus_phy_suspend(struct device *dev)
119 struct phy_device *phydev = to_phy_device(dev);
121 /* We must stop the state machine manually, otherwise it stops out of
122 * control, possibly with the phydev->lock held. Upon resume, netdev
123 * may call phy routines that try to grab the same lock, and that may
124 * lead to a deadlock.
126 if (phydev->attached_dev && phydev->adjust_link)
127 phy_stop_machine(phydev);
129 if (!mdio_bus_phy_may_suspend(phydev))
132 return phy_suspend(phydev);
135 static int mdio_bus_phy_resume(struct device *dev)
137 struct phy_device *phydev = to_phy_device(dev);
140 if (!mdio_bus_phy_may_suspend(phydev))
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 /* The PHY needs to renegotiate. */
169 phydev->state = PHY_UP;
171 phy_start_machine(phydev);
176 static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
177 .suspend = mdio_bus_phy_suspend,
178 .resume = mdio_bus_phy_resume,
179 .freeze = mdio_bus_phy_suspend,
180 .thaw = mdio_bus_phy_resume,
181 .restore = mdio_bus_phy_restore,
184 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
188 #define MDIO_BUS_PHY_PM_OPS NULL
190 #endif /* CONFIG_PM */
193 * phy_register_fixup - creates a new phy_fixup and adds it to the list
194 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
195 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
196 * It can also be PHY_ANY_UID
197 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
199 * @run: The actual code to be run when a matching PHY is found
201 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
202 int (*run)(struct phy_device *))
204 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
209 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
210 fixup->phy_uid = phy_uid;
211 fixup->phy_uid_mask = phy_uid_mask;
214 mutex_lock(&phy_fixup_lock);
215 list_add_tail(&fixup->list, &phy_fixup_list);
216 mutex_unlock(&phy_fixup_lock);
220 EXPORT_SYMBOL(phy_register_fixup);
222 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
223 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
224 int (*run)(struct phy_device *))
226 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
228 EXPORT_SYMBOL(phy_register_fixup_for_uid);
230 /* Registers a fixup to be run on the PHY with id string bus_id */
231 int phy_register_fixup_for_id(const char *bus_id,
232 int (*run)(struct phy_device *))
234 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
236 EXPORT_SYMBOL(phy_register_fixup_for_id);
239 * phy_unregister_fixup - remove a phy_fixup from the list
240 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
241 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
242 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
244 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
246 struct list_head *pos, *n;
247 struct phy_fixup *fixup;
252 mutex_lock(&phy_fixup_lock);
253 list_for_each_safe(pos, n, &phy_fixup_list) {
254 fixup = list_entry(pos, struct phy_fixup, list);
256 if ((!strcmp(fixup->bus_id, bus_id)) &&
257 ((fixup->phy_uid & phy_uid_mask) ==
258 (phy_uid & phy_uid_mask))) {
259 list_del(&fixup->list);
265 mutex_unlock(&phy_fixup_lock);
269 EXPORT_SYMBOL(phy_unregister_fixup);
271 /* Unregisters a fixup of any PHY with the UID in phy_uid */
272 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
274 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
276 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
278 /* Unregisters a fixup of the PHY with id string bus_id */
279 int phy_unregister_fixup_for_id(const char *bus_id)
281 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
283 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
285 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
286 * Fixups can be set to match any in one or more fields.
288 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
290 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
291 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
294 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
295 (phydev->phy_id & fixup->phy_uid_mask))
296 if (fixup->phy_uid != PHY_ANY_UID)
302 /* Runs any matching fixups for this phydev */
303 static int phy_scan_fixups(struct phy_device *phydev)
305 struct phy_fixup *fixup;
307 mutex_lock(&phy_fixup_lock);
308 list_for_each_entry(fixup, &phy_fixup_list, list) {
309 if (phy_needs_fixup(phydev, fixup)) {
310 int err = fixup->run(phydev);
313 mutex_unlock(&phy_fixup_lock);
316 phydev->has_fixups = true;
319 mutex_unlock(&phy_fixup_lock);
324 static int phy_bus_match(struct device *dev, struct device_driver *drv)
326 struct phy_device *phydev = to_phy_device(dev);
327 struct phy_driver *phydrv = to_phy_driver(drv);
328 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
331 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
334 if (phydrv->match_phy_device)
335 return phydrv->match_phy_device(phydev);
337 if (phydev->is_c45) {
338 for (i = 1; i < num_ids; i++) {
339 if (!(phydev->c45_ids.devices_in_package & (1 << i)))
342 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
343 (phydev->c45_ids.device_ids[i] &
344 phydrv->phy_id_mask))
349 return (phydrv->phy_id & phydrv->phy_id_mask) ==
350 (phydev->phy_id & phydrv->phy_id_mask);
355 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
357 struct phy_device *phydev = to_phy_device(dev);
359 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
361 static DEVICE_ATTR_RO(phy_id);
364 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
366 struct phy_device *phydev = to_phy_device(dev);
367 const char *mode = NULL;
369 if (phy_is_internal(phydev))
372 mode = phy_modes(phydev->interface);
374 return sprintf(buf, "%s\n", mode);
376 static DEVICE_ATTR_RO(phy_interface);
379 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
382 struct phy_device *phydev = to_phy_device(dev);
384 return sprintf(buf, "%d\n", phydev->has_fixups);
386 static DEVICE_ATTR_RO(phy_has_fixups);
388 static struct attribute *phy_dev_attrs[] = {
389 &dev_attr_phy_id.attr,
390 &dev_attr_phy_interface.attr,
391 &dev_attr_phy_has_fixups.attr,
394 ATTRIBUTE_GROUPS(phy_dev);
396 static const struct device_type mdio_bus_phy_type = {
398 .groups = phy_dev_groups,
399 .release = phy_device_release,
400 .pm = MDIO_BUS_PHY_PM_OPS,
403 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
405 struct phy_c45_device_ids *c45_ids)
407 struct phy_device *dev;
408 struct mdio_device *mdiodev;
410 /* We allocate the device, and initialize the default values */
411 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
413 return ERR_PTR(-ENOMEM);
415 mdiodev = &dev->mdio;
416 mdiodev->dev.parent = &bus->dev;
417 mdiodev->dev.bus = &mdio_bus_type;
418 mdiodev->dev.type = &mdio_bus_phy_type;
420 mdiodev->bus_match = phy_bus_match;
421 mdiodev->addr = addr;
422 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
423 mdiodev->device_free = phy_mdio_device_free;
424 mdiodev->device_remove = phy_mdio_device_remove;
431 dev->interface = PHY_INTERFACE_MODE_GMII;
433 dev->autoneg = AUTONEG_ENABLE;
435 dev->is_c45 = is_c45;
436 dev->phy_id = phy_id;
438 dev->c45_ids = *c45_ids;
439 dev->irq = bus->irq[addr];
440 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
442 dev->state = PHY_DOWN;
444 mutex_init(&dev->lock);
445 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
446 INIT_WORK(&dev->phy_queue, phy_change_work);
448 /* Request the appropriate module unconditionally; don't
449 * bother trying to do so only if it isn't already loaded,
450 * because that gets complicated. A hotplug event would have
451 * done an unconditional modprobe anyway.
452 * We don't do normal hotplug because it won't work for MDIO
453 * -- because it relies on the device staying around for long
454 * enough for the driver to get loaded. With MDIO, the NIC
455 * driver will get bored and give up as soon as it finds that
456 * there's no driver _already_ loaded.
458 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
460 device_initialize(&mdiodev->dev);
464 EXPORT_SYMBOL(phy_device_create);
466 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
467 * @bus: the target MII bus
468 * @addr: PHY address on the MII bus
469 * @dev_addr: MMD address in the PHY.
470 * @devices_in_package: where to store the devices in package information.
472 * Description: reads devices in package registers of a MMD at @dev_addr
473 * from PHY at @addr on @bus.
475 * Returns: 0 on success, -EIO on failure.
477 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
478 u32 *devices_in_package)
480 int phy_reg, reg_addr;
482 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
483 phy_reg = mdiobus_read(bus, addr, reg_addr);
486 *devices_in_package = (phy_reg & 0xffff) << 16;
488 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
489 phy_reg = mdiobus_read(bus, addr, reg_addr);
492 *devices_in_package |= (phy_reg & 0xffff);
498 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
499 * @bus: the target MII bus
500 * @addr: PHY address on the MII bus
501 * @phy_id: where to store the ID retrieved.
502 * @c45_ids: where to store the c45 ID information.
504 * If the PHY devices-in-package appears to be valid, it and the
505 * corresponding identifiers are stored in @c45_ids, zero is stored
506 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
510 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
511 struct phy_c45_device_ids *c45_ids) {
514 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
515 u32 *devs = &c45_ids->devices_in_package;
517 /* Find first non-zero Devices In package. Device zero is reserved
518 * for 802.3 c45 complied PHYs, so don't probe it at first.
520 for (i = 1; i < num_ids && *devs == 0; i++) {
521 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
525 if ((*devs & 0x1fffffff) == 0x1fffffff) {
526 /* If mostly Fs, there is no device there,
527 * then let's continue to probe more, as some
528 * 10G PHYs have zero Devices In package,
529 * e.g. Cortina CS4315/CS4340 PHY.
531 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
534 /* no device there, let's get out of here */
535 if ((*devs & 0x1fffffff) == 0x1fffffff) {
536 *phy_id = 0xffffffff;
544 /* Now probe Device Identifiers for each device present. */
545 for (i = 1; i < num_ids; i++) {
546 if (!(c45_ids->devices_in_package & (1 << i)))
549 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
550 phy_reg = mdiobus_read(bus, addr, reg_addr);
553 c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
555 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
556 phy_reg = mdiobus_read(bus, addr, reg_addr);
559 c45_ids->device_ids[i] |= (phy_reg & 0xffff);
566 * get_phy_id - reads the specified addr for its ID.
567 * @bus: the target MII bus
568 * @addr: PHY address on the MII bus
569 * @phy_id: where to store the ID retrieved.
570 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
571 * @c45_ids: where to store the c45 ID information.
573 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
574 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
577 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
578 * its return value is in turn returned.
581 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
582 bool is_c45, struct phy_c45_device_ids *c45_ids)
587 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
589 /* Grab the bits from PHYIR1, and put them in the upper half */
590 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
592 /* if there is no device, return without an error so scanning
593 * the bus works properly
595 if (phy_reg == -EIO || phy_reg == -ENODEV) {
596 *phy_id = 0xffffffff;
603 *phy_id = (phy_reg & 0xffff) << 16;
605 /* Grab the bits from PHYIR2, and put them in the lower half */
606 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
610 *phy_id |= (phy_reg & 0xffff);
616 * get_phy_device - reads the specified PHY device and returns its @phy_device
618 * @bus: the target MII bus
619 * @addr: PHY address on the MII bus
620 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
622 * Description: Reads the ID registers of the PHY at @addr on the
623 * @bus, then allocates and returns the phy_device to represent it.
625 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
627 struct phy_c45_device_ids c45_ids = {0};
631 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
635 /* If the phy_id is mostly Fs, there is no device there */
636 if ((phy_id & 0x1fffffff) == 0x1fffffff)
637 return ERR_PTR(-ENODEV);
639 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
641 EXPORT_SYMBOL(get_phy_device);
644 * phy_device_register - Register the phy device on the MDIO bus
645 * @phydev: phy_device structure to be added to the MDIO bus
647 int phy_device_register(struct phy_device *phydev)
651 err = mdiobus_register_device(&phydev->mdio);
655 /* Deassert the reset signal */
656 phy_device_reset(phydev, 0);
658 /* Run all of the fixups for this PHY */
659 err = phy_scan_fixups(phydev);
661 pr_err("PHY %d failed to initialize\n", phydev->mdio.addr);
665 err = device_add(&phydev->mdio.dev);
667 pr_err("PHY %d failed to add\n", phydev->mdio.addr);
674 /* Assert the reset signal */
675 phy_device_reset(phydev, 1);
677 mdiobus_unregister_device(&phydev->mdio);
680 EXPORT_SYMBOL(phy_device_register);
683 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
684 * @phydev: phy_device structure to remove
686 * This doesn't free the phy_device itself, it merely reverses the effects
687 * of phy_device_register(). Use phy_device_free() to free the device
688 * after calling this function.
690 void phy_device_remove(struct phy_device *phydev)
692 device_del(&phydev->mdio.dev);
694 /* Assert the reset signal */
695 phy_device_reset(phydev, 1);
697 mdiobus_unregister_device(&phydev->mdio);
699 EXPORT_SYMBOL(phy_device_remove);
702 * phy_find_first - finds the first PHY device on the bus
703 * @bus: the target MII bus
705 struct phy_device *phy_find_first(struct mii_bus *bus)
707 struct phy_device *phydev;
710 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
711 phydev = mdiobus_get_phy(bus, addr);
717 EXPORT_SYMBOL(phy_find_first);
719 static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
721 struct net_device *netdev = phydev->attached_dev;
725 netif_carrier_on(netdev);
727 netif_carrier_off(netdev);
729 phydev->adjust_link(netdev);
733 * phy_prepare_link - prepares the PHY layer to monitor link status
734 * @phydev: target phy_device struct
735 * @handler: callback function for link status change notifications
737 * Description: Tells the PHY infrastructure to handle the
738 * gory details on monitoring link status (whether through
739 * polling or an interrupt), and to call back to the
740 * connected device driver when the link status changes.
741 * If you want to monitor your own link state, don't call
744 static void phy_prepare_link(struct phy_device *phydev,
745 void (*handler)(struct net_device *))
747 phydev->adjust_link = handler;
751 * phy_connect_direct - connect an ethernet device to a specific phy_device
752 * @dev: the network device to connect
753 * @phydev: the pointer to the phy device
754 * @handler: callback function for state change notifications
755 * @interface: PHY device's interface
757 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
758 void (*handler)(struct net_device *),
759 phy_interface_t interface)
763 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
767 phy_prepare_link(phydev, handler);
768 phy_start_machine(phydev);
770 phy_start_interrupts(phydev);
774 EXPORT_SYMBOL(phy_connect_direct);
777 * phy_connect - connect an ethernet device to a PHY device
778 * @dev: the network device to connect
779 * @bus_id: the id string of the PHY device to connect
780 * @handler: callback function for state change notifications
781 * @interface: PHY device's interface
783 * Description: Convenience function for connecting ethernet
784 * devices to PHY devices. The default behavior is for
785 * the PHY infrastructure to handle everything, and only notify
786 * the connected driver when the link status changes. If you
787 * don't want, or can't use the provided functionality, you may
788 * choose to call only the subset of functions which provide
789 * the desired functionality.
791 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
792 void (*handler)(struct net_device *),
793 phy_interface_t interface)
795 struct phy_device *phydev;
799 /* Search the list of PHY devices on the mdio bus for the
800 * PHY with the requested name
802 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
804 pr_err("PHY %s not found\n", bus_id);
805 return ERR_PTR(-ENODEV);
807 phydev = to_phy_device(d);
809 rc = phy_connect_direct(dev, phydev, handler, interface);
816 EXPORT_SYMBOL(phy_connect);
819 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
821 * @phydev: target phy_device struct
823 void phy_disconnect(struct phy_device *phydev)
826 phy_stop_interrupts(phydev);
828 phy_stop_machine(phydev);
830 phydev->adjust_link = NULL;
834 EXPORT_SYMBOL(phy_disconnect);
837 * phy_poll_reset - Safely wait until a PHY reset has properly completed
838 * @phydev: The PHY device to poll
840 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
841 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
842 * register must be polled until the BMCR_RESET bit clears.
844 * Furthermore, any attempts to write to PHY registers may have no effect
845 * or even generate MDIO bus errors until this is complete.
847 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
848 * standard and do not fully reset after the BMCR_RESET bit is set, and may
849 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
850 * effort to support such broken PHYs, this function is separate from the
851 * standard phy_init_hw() which will zero all the other bits in the BMCR
852 * and reapply all driver-specific and board-specific fixups.
854 static int phy_poll_reset(struct phy_device *phydev)
856 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
857 unsigned int retries = 12;
862 ret = phy_read(phydev, MII_BMCR);
865 } while (ret & BMCR_RESET && --retries);
866 if (ret & BMCR_RESET)
869 /* Some chips (smsc911x) may still need up to another 1ms after the
870 * BMCR_RESET bit is cleared before they are usable.
876 int phy_init_hw(struct phy_device *phydev)
880 /* Deassert the reset signal */
881 phy_device_reset(phydev, 0);
883 if (!phydev->drv || !phydev->drv->config_init)
886 if (phydev->drv->soft_reset)
887 ret = phydev->drv->soft_reset(phydev);
889 ret = genphy_soft_reset(phydev);
894 ret = phy_scan_fixups(phydev);
898 return phydev->drv->config_init(phydev);
900 EXPORT_SYMBOL(phy_init_hw);
902 void phy_attached_info(struct phy_device *phydev)
904 phy_attached_print(phydev, NULL);
906 EXPORT_SYMBOL(phy_attached_info);
908 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
909 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
911 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
915 switch(phydev->irq) {
919 case PHY_IGNORE_INTERRUPT:
923 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
930 dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n",
931 drv_name, phydev_name(phydev),
936 dev_info(&phydev->mdio.dev, ATTACHED_FMT,
937 drv_name, phydev_name(phydev),
945 EXPORT_SYMBOL(phy_attached_print);
948 * phy_attach_direct - attach a network device to a given PHY device pointer
949 * @dev: network device to attach
950 * @phydev: Pointer to phy_device to attach
951 * @flags: PHY device's dev_flags
952 * @interface: PHY device's interface
954 * Description: Called by drivers to attach to a particular PHY
955 * device. The phy_device is found, and properly hooked up
956 * to the phy_driver. If no driver is attached, then a
957 * generic driver is used. The phy_device is given a ptr to
958 * the attaching device, and given a callback for link status
959 * change. The phy_device is returned to the attaching driver.
960 * This function takes a reference on the phy device.
962 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
963 u32 flags, phy_interface_t interface)
965 struct module *ndev_owner = dev->dev.parent->driver->owner;
966 struct mii_bus *bus = phydev->mdio.bus;
967 struct device *d = &phydev->mdio.dev;
968 bool using_genphy = false;
971 /* For Ethernet device drivers that register their own MDIO bus, we
972 * will have bus->owner match ndev_mod, so we do not want to increment
973 * our own module->refcnt here, otherwise we would not be able to
976 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
977 dev_err(&dev->dev, "failed to get the bus module\n");
983 /* Assume that if there is no driver, that it doesn't
984 * exist, and we should use the genphy driver.
988 d->driver = &genphy_10g_driver.mdiodrv.driver;
990 d->driver = &genphy_driver.mdiodrv.driver;
995 if (!try_module_get(d->driver->owner)) {
996 dev_err(&dev->dev, "failed to get the device driver module\n");
998 goto error_put_device;
1002 err = d->driver->probe(d);
1004 err = device_bind_driver(d);
1007 goto error_module_put;
1010 if (phydev->attached_dev) {
1011 dev_err(&dev->dev, "PHY already attached\n");
1016 phydev->phy_link_change = phy_link_change;
1017 phydev->attached_dev = dev;
1018 dev->phydev = phydev;
1020 /* Some Ethernet drivers try to connect to a PHY device before
1021 * calling register_netdevice() -> netdev_register_kobject() and
1022 * does the dev->dev.kobj initialization. Here we only check for
1023 * success which indicates that the network device kobject is
1024 * ready. Once we do that we still need to keep track of whether
1025 * links were successfully set up or not for phy_detach() to
1026 * remove them accordingly.
1028 phydev->sysfs_links = false;
1030 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1033 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1034 &phydev->mdio.dev.kobj,
1037 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1038 kobject_name(&phydev->mdio.dev.kobj),
1040 /* non-fatal - some net drivers can use one netdevice
1041 * with more then one phy
1045 phydev->sysfs_links = true;
1048 phydev->dev_flags = flags;
1050 phydev->interface = interface;
1052 phydev->state = PHY_READY;
1054 /* Initial carrier state is off as the phy is about to be
1057 netif_carrier_off(phydev->attached_dev);
1059 /* Do initial configuration here, now that
1060 * we have certain key parameters
1061 * (dev_flags and interface)
1063 err = phy_init_hw(phydev);
1068 phy_led_triggers_register(phydev);
1073 /* phy_detach() does all of the cleanup below */
1078 module_put(d->driver->owner);
1081 if (ndev_owner != bus->owner)
1082 module_put(bus->owner);
1085 EXPORT_SYMBOL(phy_attach_direct);
1088 * phy_attach - attach a network device to a particular PHY device
1089 * @dev: network device to attach
1090 * @bus_id: Bus ID of PHY device to attach
1091 * @interface: PHY device's interface
1093 * Description: Same as phy_attach_direct() except that a PHY bus_id
1094 * string is passed instead of a pointer to a struct phy_device.
1096 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1097 phy_interface_t interface)
1099 struct bus_type *bus = &mdio_bus_type;
1100 struct phy_device *phydev;
1104 /* Search the list of PHY devices on the mdio bus for the
1105 * PHY with the requested name
1107 d = bus_find_device_by_name(bus, NULL, bus_id);
1109 pr_err("PHY %s not found\n", bus_id);
1110 return ERR_PTR(-ENODEV);
1112 phydev = to_phy_device(d);
1114 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1121 EXPORT_SYMBOL(phy_attach);
1124 * phy_detach - detach a PHY device from its network device
1125 * @phydev: target phy_device struct
1127 * This detaches the phy device from its network device and the phy
1128 * driver, and drops the reference count taken in phy_attach_direct().
1130 void phy_detach(struct phy_device *phydev)
1132 struct net_device *dev = phydev->attached_dev;
1133 struct module *ndev_owner = dev->dev.parent->driver->owner;
1134 struct mii_bus *bus;
1136 if (phydev->sysfs_links) {
1137 sysfs_remove_link(&dev->dev.kobj, "phydev");
1138 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1140 phy_suspend(phydev);
1141 phydev->attached_dev->phydev = NULL;
1142 phydev->attached_dev = NULL;
1143 phydev->phylink = NULL;
1145 phy_led_triggers_unregister(phydev);
1147 module_put(phydev->mdio.dev.driver->owner);
1149 /* If the device had no specific driver before (i.e. - it
1150 * was using the generic driver), we unbind the device
1151 * from the generic driver so that there's a chance a
1152 * real driver could be loaded
1154 if (phydev->mdio.dev.driver == &genphy_10g_driver.mdiodrv.driver ||
1155 phydev->mdio.dev.driver == &genphy_driver.mdiodrv.driver)
1156 device_release_driver(&phydev->mdio.dev);
1159 * The phydev might go away on the put_device() below, so avoid
1160 * a use-after-free bug by reading the underlying bus first.
1162 bus = phydev->mdio.bus;
1164 put_device(&phydev->mdio.dev);
1165 if (ndev_owner != bus->owner)
1166 module_put(bus->owner);
1168 /* Assert the reset signal */
1169 phy_device_reset(phydev, 1);
1171 EXPORT_SYMBOL(phy_detach);
1173 int phy_suspend(struct phy_device *phydev)
1175 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1176 struct net_device *netdev = phydev->attached_dev;
1177 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1180 /* If the device has WOL enabled, we cannot suspend the PHY */
1181 phy_ethtool_get_wol(phydev, &wol);
1182 if (wol.wolopts || (netdev && netdev->wol_enabled))
1185 if (phydev->drv && phydrv->suspend)
1186 ret = phydrv->suspend(phydev);
1191 phydev->suspended = true;
1195 EXPORT_SYMBOL(phy_suspend);
1197 int __phy_resume(struct phy_device *phydev)
1199 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1202 WARN_ON(!mutex_is_locked(&phydev->lock));
1204 if (phydev->drv && phydrv->resume)
1205 ret = phydrv->resume(phydev);
1210 phydev->suspended = false;
1214 EXPORT_SYMBOL(__phy_resume);
1216 int phy_resume(struct phy_device *phydev)
1220 mutex_lock(&phydev->lock);
1221 ret = __phy_resume(phydev);
1222 mutex_unlock(&phydev->lock);
1226 EXPORT_SYMBOL(phy_resume);
1228 int phy_loopback(struct phy_device *phydev, bool enable)
1230 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1233 mutex_lock(&phydev->lock);
1235 if (enable && phydev->loopback_enabled) {
1240 if (!enable && !phydev->loopback_enabled) {
1245 if (phydev->drv && phydrv->set_loopback)
1246 ret = phydrv->set_loopback(phydev, enable);
1253 phydev->loopback_enabled = enable;
1256 mutex_unlock(&phydev->lock);
1259 EXPORT_SYMBOL(phy_loopback);
1262 * phy_reset_after_clk_enable - perform a PHY reset if needed
1263 * @phydev: target phy_device struct
1265 * Description: Some PHYs are known to need a reset after their refclk was
1266 * enabled. This function evaluates the flags and perform the reset if it's
1267 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1270 int phy_reset_after_clk_enable(struct phy_device *phydev)
1272 if (!phydev || !phydev->drv)
1275 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1276 phy_device_reset(phydev, 1);
1277 phy_device_reset(phydev, 0);
1283 EXPORT_SYMBOL(phy_reset_after_clk_enable);
1285 /* Generic PHY support and helper functions */
1288 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1289 * @phydev: target phy_device struct
1291 * Description: Writes MII_ADVERTISE with the appropriate values,
1292 * after sanitizing the values to make sure we only advertise
1293 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1294 * hasn't changed, and > 0 if it has changed.
1296 static int genphy_config_advert(struct phy_device *phydev)
1299 int oldadv, adv, bmsr;
1300 int err, changed = 0;
1302 /* Only allow advertising what this PHY supports */
1303 phydev->advertising &= phydev->supported;
1304 advertise = phydev->advertising;
1306 /* Setup standard advertisement */
1307 adv = phy_read(phydev, MII_ADVERTISE);
1312 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
1313 ADVERTISE_PAUSE_ASYM);
1314 adv |= ethtool_adv_to_mii_adv_t(advertise);
1316 if (adv != oldadv) {
1317 err = phy_write(phydev, MII_ADVERTISE, adv);
1324 bmsr = phy_read(phydev, MII_BMSR);
1328 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1329 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1332 if (!(bmsr & BMSR_ESTATEN))
1335 /* Configure gigabit if it's supported */
1336 adv = phy_read(phydev, MII_CTRL1000);
1341 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
1343 if (phydev->supported & (SUPPORTED_1000baseT_Half |
1344 SUPPORTED_1000baseT_Full)) {
1345 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
1351 err = phy_write(phydev, MII_CTRL1000, adv);
1359 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1360 * @phydev: target phy_device struct
1362 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1363 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1364 * changed, and 1 if it has changed.
1366 static int genphy_config_eee_advert(struct phy_device *phydev)
1368 int broken = phydev->eee_broken_modes;
1371 /* Nothing to disable */
1375 /* If the following call fails, we assume that EEE is not
1376 * supported by the phy. If we read 0, EEE is not advertised
1377 * In both case, we don't need to continue
1379 adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1386 /* Advertising remains unchanged with the broken mask */
1390 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1396 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1397 * @phydev: target phy_device struct
1399 * Description: Configures MII_BMCR to force speed/duplex
1400 * to the values in phydev. Assumes that the values are valid.
1401 * Please see phy_sanitize_settings().
1403 int genphy_setup_forced(struct phy_device *phydev)
1408 phydev->asym_pause = 0;
1410 if (SPEED_1000 == phydev->speed)
1411 ctl |= BMCR_SPEED1000;
1412 else if (SPEED_100 == phydev->speed)
1413 ctl |= BMCR_SPEED100;
1415 if (DUPLEX_FULL == phydev->duplex)
1416 ctl |= BMCR_FULLDPLX;
1418 return phy_modify(phydev, MII_BMCR,
1419 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
1421 EXPORT_SYMBOL(genphy_setup_forced);
1424 * genphy_restart_aneg - Enable and Restart Autonegotiation
1425 * @phydev: target phy_device struct
1427 int genphy_restart_aneg(struct phy_device *phydev)
1429 /* Don't isolate the PHY if we're negotiating */
1430 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
1431 BMCR_ANENABLE | BMCR_ANRESTART);
1433 EXPORT_SYMBOL(genphy_restart_aneg);
1436 * genphy_config_aneg - restart auto-negotiation or write BMCR
1437 * @phydev: target phy_device struct
1439 * Description: If auto-negotiation is enabled, we configure the
1440 * advertising, and then restart auto-negotiation. If it is not
1441 * enabled, then we write the BMCR.
1443 int genphy_config_aneg(struct phy_device *phydev)
1447 changed = genphy_config_eee_advert(phydev);
1449 if (AUTONEG_ENABLE != phydev->autoneg)
1450 return genphy_setup_forced(phydev);
1452 err = genphy_config_advert(phydev);
1453 if (err < 0) /* error */
1459 /* Advertisement hasn't changed, but maybe aneg was never on to
1460 * begin with? Or maybe phy was isolated?
1462 int ctl = phy_read(phydev, MII_BMCR);
1467 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1468 changed = 1; /* do restart aneg */
1471 /* Only restart aneg if we are advertising something different
1472 * than we were before.
1475 return genphy_restart_aneg(phydev);
1479 EXPORT_SYMBOL(genphy_config_aneg);
1482 * genphy_aneg_done - return auto-negotiation status
1483 * @phydev: target phy_device struct
1485 * Description: Reads the status register and returns 0 either if
1486 * auto-negotiation is incomplete, or if there was an error.
1487 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1489 int genphy_aneg_done(struct phy_device *phydev)
1491 int retval = phy_read(phydev, MII_BMSR);
1493 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1495 EXPORT_SYMBOL(genphy_aneg_done);
1498 * genphy_update_link - update link status in @phydev
1499 * @phydev: target phy_device struct
1501 * Description: Update the value in phydev->link to reflect the
1502 * current link value. In order to do this, we need to read
1503 * the status register twice, keeping the second value.
1505 int genphy_update_link(struct phy_device *phydev)
1509 /* Do a fake read */
1510 status = phy_read(phydev, MII_BMSR);
1514 /* Read link and autonegotiation status */
1515 status = phy_read(phydev, MII_BMSR);
1519 if ((status & BMSR_LSTATUS) == 0)
1526 EXPORT_SYMBOL(genphy_update_link);
1529 * genphy_read_status - check the link status and update current link state
1530 * @phydev: target phy_device struct
1532 * Description: Check the link, then figure out the current state
1533 * by comparing what we advertise with what the link partner
1534 * advertises. Start by checking the gigabit possibilities,
1535 * then move on to 10/100.
1537 int genphy_read_status(struct phy_device *phydev)
1544 int common_adv_gb = 0;
1546 /* Update the link, but return if there was an error */
1547 err = genphy_update_link(phydev);
1551 phydev->lp_advertising = 0;
1553 if (AUTONEG_ENABLE == phydev->autoneg) {
1554 if (phydev->supported & (SUPPORTED_1000baseT_Half
1555 | SUPPORTED_1000baseT_Full)) {
1556 lpagb = phy_read(phydev, MII_STAT1000);
1560 adv = phy_read(phydev, MII_CTRL1000);
1564 if (lpagb & LPA_1000MSFAIL) {
1565 if (adv & CTL1000_ENABLE_MASTER)
1566 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
1568 phydev_err(phydev, "Master/Slave resolution failed\n");
1572 phydev->lp_advertising =
1573 mii_stat1000_to_ethtool_lpa_t(lpagb);
1574 common_adv_gb = lpagb & adv << 2;
1577 lpa = phy_read(phydev, MII_LPA);
1581 phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
1583 adv = phy_read(phydev, MII_ADVERTISE);
1587 common_adv = lpa & adv;
1589 phydev->speed = SPEED_10;
1590 phydev->duplex = DUPLEX_HALF;
1592 phydev->asym_pause = 0;
1594 if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) {
1595 phydev->speed = SPEED_1000;
1597 if (common_adv_gb & LPA_1000FULL)
1598 phydev->duplex = DUPLEX_FULL;
1599 } else if (common_adv & (LPA_100FULL | LPA_100HALF)) {
1600 phydev->speed = SPEED_100;
1602 if (common_adv & LPA_100FULL)
1603 phydev->duplex = DUPLEX_FULL;
1605 if (common_adv & LPA_10FULL)
1606 phydev->duplex = DUPLEX_FULL;
1608 if (phydev->duplex == DUPLEX_FULL) {
1609 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
1610 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
1613 int bmcr = phy_read(phydev, MII_BMCR);
1618 if (bmcr & BMCR_FULLDPLX)
1619 phydev->duplex = DUPLEX_FULL;
1621 phydev->duplex = DUPLEX_HALF;
1623 if (bmcr & BMCR_SPEED1000)
1624 phydev->speed = SPEED_1000;
1625 else if (bmcr & BMCR_SPEED100)
1626 phydev->speed = SPEED_100;
1628 phydev->speed = SPEED_10;
1631 phydev->asym_pause = 0;
1636 EXPORT_SYMBOL(genphy_read_status);
1639 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1640 * @phydev: target phy_device struct
1642 * Description: Perform a software PHY reset using the standard
1643 * BMCR_RESET bit and poll for the reset bit to be cleared.
1645 * Returns: 0 on success, < 0 on failure
1647 int genphy_soft_reset(struct phy_device *phydev)
1651 ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
1655 return phy_poll_reset(phydev);
1657 EXPORT_SYMBOL(genphy_soft_reset);
1659 int genphy_config_init(struct phy_device *phydev)
1664 features = (SUPPORTED_TP | SUPPORTED_MII
1665 | SUPPORTED_AUI | SUPPORTED_FIBRE |
1666 SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1668 /* Do we support autonegotiation? */
1669 val = phy_read(phydev, MII_BMSR);
1673 if (val & BMSR_ANEGCAPABLE)
1674 features |= SUPPORTED_Autoneg;
1676 if (val & BMSR_100FULL)
1677 features |= SUPPORTED_100baseT_Full;
1678 if (val & BMSR_100HALF)
1679 features |= SUPPORTED_100baseT_Half;
1680 if (val & BMSR_10FULL)
1681 features |= SUPPORTED_10baseT_Full;
1682 if (val & BMSR_10HALF)
1683 features |= SUPPORTED_10baseT_Half;
1685 if (val & BMSR_ESTATEN) {
1686 val = phy_read(phydev, MII_ESTATUS);
1690 if (val & ESTATUS_1000_TFULL)
1691 features |= SUPPORTED_1000baseT_Full;
1692 if (val & ESTATUS_1000_THALF)
1693 features |= SUPPORTED_1000baseT_Half;
1696 phydev->supported &= features;
1697 phydev->advertising &= features;
1701 EXPORT_SYMBOL(genphy_config_init);
1703 /* This is used for the phy device which doesn't support the MMD extended
1704 * register access, but it does have side effect when we are trying to access
1705 * the MMD register via indirect method.
1707 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
1711 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
1713 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
1714 u16 regnum, u16 val)
1718 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
1720 int genphy_suspend(struct phy_device *phydev)
1722 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
1724 EXPORT_SYMBOL(genphy_suspend);
1726 int genphy_resume(struct phy_device *phydev)
1728 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
1730 EXPORT_SYMBOL(genphy_resume);
1732 int genphy_loopback(struct phy_device *phydev, bool enable)
1734 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
1735 enable ? BMCR_LOOPBACK : 0);
1737 EXPORT_SYMBOL(genphy_loopback);
1739 static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
1741 phydev->supported &= ~(PHY_1000BT_FEATURES | PHY_100BT_FEATURES |
1744 switch (max_speed) {
1748 phydev->supported |= PHY_1000BT_FEATURES;
1751 phydev->supported |= PHY_100BT_FEATURES;
1754 phydev->supported |= PHY_10BT_FEATURES;
1760 int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
1764 err = __set_phy_supported(phydev, max_speed);
1768 phydev->advertising = phydev->supported;
1772 EXPORT_SYMBOL(phy_set_max_speed);
1774 static void of_set_phy_supported(struct phy_device *phydev)
1776 struct device_node *node = phydev->mdio.dev.of_node;
1779 if (!IS_ENABLED(CONFIG_OF_MDIO))
1785 if (!of_property_read_u32(node, "max-speed", &max_speed))
1786 __set_phy_supported(phydev, max_speed);
1789 static void of_set_phy_eee_broken(struct phy_device *phydev)
1791 struct device_node *node = phydev->mdio.dev.of_node;
1794 if (!IS_ENABLED(CONFIG_OF_MDIO))
1800 if (of_property_read_bool(node, "eee-broken-100tx"))
1801 broken |= MDIO_EEE_100TX;
1802 if (of_property_read_bool(node, "eee-broken-1000t"))
1803 broken |= MDIO_EEE_1000T;
1804 if (of_property_read_bool(node, "eee-broken-10gt"))
1805 broken |= MDIO_EEE_10GT;
1806 if (of_property_read_bool(node, "eee-broken-1000kx"))
1807 broken |= MDIO_EEE_1000KX;
1808 if (of_property_read_bool(node, "eee-broken-10gkx4"))
1809 broken |= MDIO_EEE_10GKX4;
1810 if (of_property_read_bool(node, "eee-broken-10gkr"))
1811 broken |= MDIO_EEE_10GKR;
1813 phydev->eee_broken_modes = broken;
1817 * phy_probe - probe and init a PHY device
1818 * @dev: device to probe and init
1820 * Description: Take care of setting up the phy_device structure,
1821 * set the state to READY (the driver's init function should
1822 * set it to STARTING if needed).
1824 static int phy_probe(struct device *dev)
1826 struct phy_device *phydev = to_phy_device(dev);
1827 struct device_driver *drv = phydev->mdio.dev.driver;
1828 struct phy_driver *phydrv = to_phy_driver(drv);
1831 phydev->drv = phydrv;
1833 /* Disable the interrupt if the PHY doesn't support it
1834 * but the interrupt is still a valid one
1836 if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
1837 phy_interrupt_is_valid(phydev))
1838 phydev->irq = PHY_POLL;
1840 if (phydrv->flags & PHY_IS_INTERNAL)
1841 phydev->is_internal = true;
1843 mutex_lock(&phydev->lock);
1845 /* Start out supporting everything. Eventually,
1846 * a controller will attach, and may modify one
1847 * or both of these values
1849 phydev->supported = phydrv->features;
1850 of_set_phy_supported(phydev);
1851 phydev->advertising = phydev->supported;
1853 /* Get the EEE modes we want to prohibit. We will ask
1854 * the PHY stop advertising these mode later on
1856 of_set_phy_eee_broken(phydev);
1858 /* The Pause Frame bits indicate that the PHY can support passing
1859 * pause frames. During autonegotiation, the PHYs will determine if
1860 * they should allow pause frames to pass. The MAC driver should then
1861 * use that result to determine whether to enable flow control via
1864 * Normally, PHY drivers should not set the Pause bits, and instead
1865 * allow phylib to do that. However, there may be some situations
1866 * (e.g. hardware erratum) where the driver wants to set only one
1869 if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) {
1870 phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1871 phydev->supported |= phydrv->features &
1872 (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1874 phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
1877 /* Set the state to READY by default */
1878 phydev->state = PHY_READY;
1880 if (phydev->drv->probe) {
1881 /* Deassert the reset signal */
1882 phy_device_reset(phydev, 0);
1884 err = phydev->drv->probe(phydev);
1886 /* Assert the reset signal */
1887 phy_device_reset(phydev, 1);
1891 mutex_unlock(&phydev->lock);
1896 static int phy_remove(struct device *dev)
1898 struct phy_device *phydev = to_phy_device(dev);
1900 cancel_delayed_work_sync(&phydev->state_queue);
1902 mutex_lock(&phydev->lock);
1903 phydev->state = PHY_DOWN;
1904 mutex_unlock(&phydev->lock);
1906 if (phydev->drv && phydev->drv->remove) {
1907 phydev->drv->remove(phydev);
1909 /* Assert the reset signal */
1910 phy_device_reset(phydev, 1);
1918 * phy_driver_register - register a phy_driver with the PHY layer
1919 * @new_driver: new phy_driver to register
1920 * @owner: module owning this PHY
1922 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
1926 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
1927 new_driver->mdiodrv.driver.name = new_driver->name;
1928 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
1929 new_driver->mdiodrv.driver.probe = phy_probe;
1930 new_driver->mdiodrv.driver.remove = phy_remove;
1931 new_driver->mdiodrv.driver.owner = owner;
1933 retval = driver_register(&new_driver->mdiodrv.driver);
1935 pr_err("%s: Error %d in registering driver\n",
1936 new_driver->name, retval);
1941 pr_debug("%s: Registered new driver\n", new_driver->name);
1945 EXPORT_SYMBOL(phy_driver_register);
1947 int phy_drivers_register(struct phy_driver *new_driver, int n,
1948 struct module *owner)
1952 for (i = 0; i < n; i++) {
1953 ret = phy_driver_register(new_driver + i, owner);
1956 phy_driver_unregister(new_driver + i);
1962 EXPORT_SYMBOL(phy_drivers_register);
1964 void phy_driver_unregister(struct phy_driver *drv)
1966 driver_unregister(&drv->mdiodrv.driver);
1968 EXPORT_SYMBOL(phy_driver_unregister);
1970 void phy_drivers_unregister(struct phy_driver *drv, int n)
1974 for (i = 0; i < n; i++)
1975 phy_driver_unregister(drv + i);
1977 EXPORT_SYMBOL(phy_drivers_unregister);
1979 static struct phy_driver genphy_driver = {
1980 .phy_id = 0xffffffff,
1981 .phy_id_mask = 0xffffffff,
1982 .name = "Generic PHY",
1983 .soft_reset = genphy_no_soft_reset,
1984 .config_init = genphy_config_init,
1985 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
1986 SUPPORTED_AUI | SUPPORTED_FIBRE |
1988 .aneg_done = genphy_aneg_done,
1989 .suspend = genphy_suspend,
1990 .resume = genphy_resume,
1991 .set_loopback = genphy_loopback,
1994 static int __init phy_init(void)
1998 rc = mdio_bus_init();
2002 rc = phy_driver_register(&genphy_10g_driver, THIS_MODULE);
2006 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
2008 phy_driver_unregister(&genphy_10g_driver);
2016 static void __exit phy_exit(void)
2018 phy_driver_unregister(&genphy_10g_driver);
2019 phy_driver_unregister(&genphy_driver);
2023 subsys_initcall(phy_init);
2024 module_exit(phy_exit);