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);
78 static struct phy_driver genphy_driver[GENPHY_DRV_MAX];
80 static LIST_HEAD(phy_fixup_list);
81 static DEFINE_MUTEX(phy_fixup_lock);
84 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
86 struct device_driver *drv = phydev->mdio.dev.driver;
87 struct phy_driver *phydrv = to_phy_driver(drv);
88 struct net_device *netdev = phydev->attached_dev;
90 if (!drv || !phydrv->suspend)
93 /* PHY not attached? May suspend if the PHY has not already been
94 * suspended as part of a prior call to phy_disconnect() ->
95 * phy_detach() -> phy_suspend() because the parent netdev might be the
96 * MDIO bus driver and clock gated at this point.
99 return !phydev->suspended;
101 /* Don't suspend PHY if the attached netdev parent may wakeup.
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);
354 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
356 struct phy_c45_device_ids *c45_ids)
358 struct phy_device *dev;
359 struct mdio_device *mdiodev;
361 /* We allocate the device, and initialize the default values */
362 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
364 return ERR_PTR(-ENOMEM);
366 mdiodev = &dev->mdio;
367 mdiodev->dev.release = phy_device_release;
368 mdiodev->dev.parent = &bus->dev;
369 mdiodev->dev.bus = &mdio_bus_type;
371 mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS;
372 mdiodev->bus_match = phy_bus_match;
373 mdiodev->addr = addr;
374 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
375 mdiodev->device_free = phy_mdio_device_free;
376 mdiodev->device_remove = phy_mdio_device_remove;
383 dev->interface = PHY_INTERFACE_MODE_GMII;
385 dev->autoneg = AUTONEG_ENABLE;
387 dev->is_c45 = is_c45;
388 dev->phy_id = phy_id;
390 dev->c45_ids = *c45_ids;
391 dev->irq = bus->irq[addr];
392 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
394 dev->state = PHY_DOWN;
396 mutex_init(&dev->lock);
397 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
398 INIT_WORK(&dev->phy_queue, phy_change_work);
400 /* Request the appropriate module unconditionally; don't
401 * bother trying to do so only if it isn't already loaded,
402 * because that gets complicated. A hotplug event would have
403 * done an unconditional modprobe anyway.
404 * We don't do normal hotplug because it won't work for MDIO
405 * -- because it relies on the device staying around for long
406 * enough for the driver to get loaded. With MDIO, the NIC
407 * driver will get bored and give up as soon as it finds that
408 * there's no driver _already_ loaded.
410 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
412 device_initialize(&mdiodev->dev);
416 EXPORT_SYMBOL(phy_device_create);
418 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
419 * @bus: the target MII bus
420 * @addr: PHY address on the MII bus
421 * @dev_addr: MMD address in the PHY.
422 * @devices_in_package: where to store the devices in package information.
424 * Description: reads devices in package registers of a MMD at @dev_addr
425 * from PHY at @addr on @bus.
427 * Returns: 0 on success, -EIO on failure.
429 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
430 u32 *devices_in_package)
432 int phy_reg, reg_addr;
434 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
435 phy_reg = mdiobus_read(bus, addr, reg_addr);
438 *devices_in_package = (phy_reg & 0xffff) << 16;
440 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
441 phy_reg = mdiobus_read(bus, addr, reg_addr);
444 *devices_in_package |= (phy_reg & 0xffff);
450 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
451 * @bus: the target MII bus
452 * @addr: PHY address on the MII bus
453 * @phy_id: where to store the ID retrieved.
454 * @c45_ids: where to store the c45 ID information.
456 * If the PHY devices-in-package appears to be valid, it and the
457 * corresponding identifiers are stored in @c45_ids, zero is stored
458 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
462 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
463 struct phy_c45_device_ids *c45_ids) {
466 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
467 u32 *devs = &c45_ids->devices_in_package;
469 /* Find first non-zero Devices In package. Device zero is reserved
470 * for 802.3 c45 complied PHYs, so don't probe it at first.
472 for (i = 1; i < num_ids && *devs == 0; i++) {
473 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
477 if ((*devs & 0x1fffffff) == 0x1fffffff) {
478 /* If mostly Fs, there is no device there,
479 * then let's continue to probe more, as some
480 * 10G PHYs have zero Devices In package,
481 * e.g. Cortina CS4315/CS4340 PHY.
483 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
486 /* no device there, let's get out of here */
487 if ((*devs & 0x1fffffff) == 0x1fffffff) {
488 *phy_id = 0xffffffff;
496 /* Now probe Device Identifiers for each device present. */
497 for (i = 1; i < num_ids; i++) {
498 if (!(c45_ids->devices_in_package & (1 << i)))
501 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
502 phy_reg = mdiobus_read(bus, addr, reg_addr);
505 c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
507 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
508 phy_reg = mdiobus_read(bus, addr, reg_addr);
511 c45_ids->device_ids[i] |= (phy_reg & 0xffff);
518 * get_phy_id - reads the specified addr for its ID.
519 * @bus: the target MII bus
520 * @addr: PHY address on the MII bus
521 * @phy_id: where to store the ID retrieved.
522 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
523 * @c45_ids: where to store the c45 ID information.
525 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
526 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
529 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
530 * its return value is in turn returned.
533 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
534 bool is_c45, struct phy_c45_device_ids *c45_ids)
539 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
541 /* Grab the bits from PHYIR1, and put them in the upper half */
542 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
546 *phy_id = (phy_reg & 0xffff) << 16;
548 /* Grab the bits from PHYIR2, and put them in the lower half */
549 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
553 *phy_id |= (phy_reg & 0xffff);
559 * get_phy_device - reads the specified PHY device and returns its @phy_device
561 * @bus: the target MII bus
562 * @addr: PHY address on the MII bus
563 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
565 * Description: Reads the ID registers of the PHY at @addr on the
566 * @bus, then allocates and returns the phy_device to represent it.
568 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
570 struct phy_c45_device_ids c45_ids = {0};
574 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
578 /* If the phy_id is mostly Fs, there is no device there */
579 if ((phy_id & 0x1fffffff) == 0x1fffffff)
580 return ERR_PTR(-ENODEV);
582 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
584 EXPORT_SYMBOL(get_phy_device);
587 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
589 struct phy_device *phydev = to_phy_device(dev);
591 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
593 static DEVICE_ATTR_RO(phy_id);
596 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
598 struct phy_device *phydev = to_phy_device(dev);
599 const char *mode = NULL;
601 if (phy_is_internal(phydev))
604 mode = phy_modes(phydev->interface);
606 return sprintf(buf, "%s\n", mode);
608 static DEVICE_ATTR_RO(phy_interface);
611 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
614 struct phy_device *phydev = to_phy_device(dev);
616 return sprintf(buf, "%d\n", phydev->has_fixups);
618 static DEVICE_ATTR_RO(phy_has_fixups);
620 static struct attribute *phy_dev_attrs[] = {
621 &dev_attr_phy_id.attr,
622 &dev_attr_phy_interface.attr,
623 &dev_attr_phy_has_fixups.attr,
626 ATTRIBUTE_GROUPS(phy_dev);
629 * phy_device_register - Register the phy device on the MDIO bus
630 * @phydev: phy_device structure to be added to the MDIO bus
632 int phy_device_register(struct phy_device *phydev)
636 err = mdiobus_register_device(&phydev->mdio);
640 /* Run all of the fixups for this PHY */
641 err = phy_scan_fixups(phydev);
643 pr_err("PHY %d failed to initialize\n", phydev->mdio.addr);
647 phydev->mdio.dev.groups = phy_dev_groups;
649 err = device_add(&phydev->mdio.dev);
651 pr_err("PHY %d failed to add\n", phydev->mdio.addr);
658 mdiobus_unregister_device(&phydev->mdio);
661 EXPORT_SYMBOL(phy_device_register);
664 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
665 * @phydev: phy_device structure to remove
667 * This doesn't free the phy_device itself, it merely reverses the effects
668 * of phy_device_register(). Use phy_device_free() to free the device
669 * after calling this function.
671 void phy_device_remove(struct phy_device *phydev)
673 device_del(&phydev->mdio.dev);
674 mdiobus_unregister_device(&phydev->mdio);
676 EXPORT_SYMBOL(phy_device_remove);
679 * phy_find_first - finds the first PHY device on the bus
680 * @bus: the target MII bus
682 struct phy_device *phy_find_first(struct mii_bus *bus)
684 struct phy_device *phydev;
687 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
688 phydev = mdiobus_get_phy(bus, addr);
694 EXPORT_SYMBOL(phy_find_first);
697 * phy_prepare_link - prepares the PHY layer to monitor link status
698 * @phydev: target phy_device struct
699 * @handler: callback function for link status change notifications
701 * Description: Tells the PHY infrastructure to handle the
702 * gory details on monitoring link status (whether through
703 * polling or an interrupt), and to call back to the
704 * connected device driver when the link status changes.
705 * If you want to monitor your own link state, don't call
708 static void phy_prepare_link(struct phy_device *phydev,
709 void (*handler)(struct net_device *))
711 phydev->adjust_link = handler;
715 * phy_connect_direct - connect an ethernet device to a specific phy_device
716 * @dev: the network device to connect
717 * @phydev: the pointer to the phy device
718 * @handler: callback function for state change notifications
719 * @interface: PHY device's interface
721 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
722 void (*handler)(struct net_device *),
723 phy_interface_t interface)
727 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
731 phy_prepare_link(phydev, handler);
732 phy_start_machine(phydev);
734 phy_start_interrupts(phydev);
738 EXPORT_SYMBOL(phy_connect_direct);
741 * phy_connect - connect an ethernet device to a PHY device
742 * @dev: the network device to connect
743 * @bus_id: the id string of the PHY device to connect
744 * @handler: callback function for state change notifications
745 * @interface: PHY device's interface
747 * Description: Convenience function for connecting ethernet
748 * devices to PHY devices. The default behavior is for
749 * the PHY infrastructure to handle everything, and only notify
750 * the connected driver when the link status changes. If you
751 * don't want, or can't use the provided functionality, you may
752 * choose to call only the subset of functions which provide
753 * the desired functionality.
755 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
756 void (*handler)(struct net_device *),
757 phy_interface_t interface)
759 struct phy_device *phydev;
763 /* Search the list of PHY devices on the mdio bus for the
764 * PHY with the requested name
766 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
768 pr_err("PHY %s not found\n", bus_id);
769 return ERR_PTR(-ENODEV);
771 phydev = to_phy_device(d);
773 rc = phy_connect_direct(dev, phydev, handler, interface);
780 EXPORT_SYMBOL(phy_connect);
783 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
785 * @phydev: target phy_device struct
787 void phy_disconnect(struct phy_device *phydev)
790 phy_stop_interrupts(phydev);
792 phy_stop_machine(phydev);
794 phydev->adjust_link = NULL;
798 EXPORT_SYMBOL(phy_disconnect);
801 * phy_poll_reset - Safely wait until a PHY reset has properly completed
802 * @phydev: The PHY device to poll
804 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
805 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
806 * register must be polled until the BMCR_RESET bit clears.
808 * Furthermore, any attempts to write to PHY registers may have no effect
809 * or even generate MDIO bus errors until this is complete.
811 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
812 * standard and do not fully reset after the BMCR_RESET bit is set, and may
813 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
814 * effort to support such broken PHYs, this function is separate from the
815 * standard phy_init_hw() which will zero all the other bits in the BMCR
816 * and reapply all driver-specific and board-specific fixups.
818 static int phy_poll_reset(struct phy_device *phydev)
820 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
821 unsigned int retries = 12;
826 ret = phy_read(phydev, MII_BMCR);
829 } while (ret & BMCR_RESET && --retries);
830 if (ret & BMCR_RESET)
833 /* Some chips (smsc911x) may still need up to another 1ms after the
834 * BMCR_RESET bit is cleared before they are usable.
840 int phy_init_hw(struct phy_device *phydev)
844 if (!phydev->drv || !phydev->drv->config_init)
847 if (phydev->drv->soft_reset)
848 ret = phydev->drv->soft_reset(phydev);
850 ret = genphy_soft_reset(phydev);
855 ret = phy_scan_fixups(phydev);
859 return phydev->drv->config_init(phydev);
861 EXPORT_SYMBOL(phy_init_hw);
863 void phy_attached_info(struct phy_device *phydev)
865 phy_attached_print(phydev, NULL);
867 EXPORT_SYMBOL(phy_attached_info);
869 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)"
870 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
873 dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n",
874 phydev->drv->name, phydev_name(phydev),
879 dev_info(&phydev->mdio.dev, ATTACHED_FMT,
880 phydev->drv->name, phydev_name(phydev),
888 EXPORT_SYMBOL(phy_attached_print);
891 * phy_attach_direct - attach a network device to a given PHY device pointer
892 * @dev: network device to attach
893 * @phydev: Pointer to phy_device to attach
894 * @flags: PHY device's dev_flags
895 * @interface: PHY device's interface
897 * Description: Called by drivers to attach to a particular PHY
898 * device. The phy_device is found, and properly hooked up
899 * to the phy_driver. If no driver is attached, then a
900 * generic driver is used. The phy_device is given a ptr to
901 * the attaching device, and given a callback for link status
902 * change. The phy_device is returned to the attaching driver.
903 * This function takes a reference on the phy device.
905 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
906 u32 flags, phy_interface_t interface)
908 struct module *ndev_owner = dev->dev.parent->driver->owner;
909 struct mii_bus *bus = phydev->mdio.bus;
910 struct device *d = &phydev->mdio.dev;
913 /* For Ethernet device drivers that register their own MDIO bus, we
914 * will have bus->owner match ndev_mod, so we do not want to increment
915 * our own module->refcnt here, otherwise we would not be able to
918 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
919 dev_err(&dev->dev, "failed to get the bus module\n");
925 /* Assume that if there is no driver, that it doesn't
926 * exist, and we should use the genphy driver.
931 &genphy_driver[GENPHY_DRV_10G].mdiodrv.driver;
934 &genphy_driver[GENPHY_DRV_1G].mdiodrv.driver;
936 err = d->driver->probe(d);
938 err = device_bind_driver(d);
944 if (phydev->attached_dev) {
945 dev_err(&dev->dev, "PHY already attached\n");
950 phydev->attached_dev = dev;
951 dev->phydev = phydev;
953 phydev->dev_flags = flags;
955 phydev->interface = interface;
957 phydev->state = PHY_READY;
959 /* Initial carrier state is off as the phy is about to be
962 netif_carrier_off(phydev->attached_dev);
964 /* Do initial configuration here, now that
965 * we have certain key parameters
966 * (dev_flags and interface)
968 err = phy_init_hw(phydev);
973 phy_led_triggers_register(phydev);
980 if (ndev_owner != bus->owner)
981 module_put(bus->owner);
984 EXPORT_SYMBOL(phy_attach_direct);
987 * phy_attach - attach a network device to a particular PHY device
988 * @dev: network device to attach
989 * @bus_id: Bus ID of PHY device to attach
990 * @interface: PHY device's interface
992 * Description: Same as phy_attach_direct() except that a PHY bus_id
993 * string is passed instead of a pointer to a struct phy_device.
995 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
996 phy_interface_t interface)
998 struct bus_type *bus = &mdio_bus_type;
999 struct phy_device *phydev;
1003 /* Search the list of PHY devices on the mdio bus for the
1004 * PHY with the requested name
1006 d = bus_find_device_by_name(bus, NULL, bus_id);
1008 pr_err("PHY %s not found\n", bus_id);
1009 return ERR_PTR(-ENODEV);
1011 phydev = to_phy_device(d);
1013 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1020 EXPORT_SYMBOL(phy_attach);
1023 * phy_detach - detach a PHY device from its network device
1024 * @phydev: target phy_device struct
1026 * This detaches the phy device from its network device and the phy
1027 * driver, and drops the reference count taken in phy_attach_direct().
1029 void phy_detach(struct phy_device *phydev)
1031 struct net_device *dev = phydev->attached_dev;
1032 struct module *ndev_owner = dev->dev.parent->driver->owner;
1033 struct mii_bus *bus;
1036 phydev->attached_dev->phydev = NULL;
1037 phydev->attached_dev = NULL;
1038 phy_suspend(phydev);
1040 phy_led_triggers_unregister(phydev);
1042 /* If the device had no specific driver before (i.e. - it
1043 * was using the generic driver), we unbind the device
1044 * from the generic driver so that there's a chance a
1045 * real driver could be loaded
1047 for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) {
1048 if (phydev->mdio.dev.driver ==
1049 &genphy_driver[i].mdiodrv.driver) {
1050 device_release_driver(&phydev->mdio.dev);
1056 * The phydev might go away on the put_device() below, so avoid
1057 * a use-after-free bug by reading the underlying bus first.
1059 bus = phydev->mdio.bus;
1061 put_device(&phydev->mdio.dev);
1062 if (ndev_owner != bus->owner)
1063 module_put(bus->owner);
1065 EXPORT_SYMBOL(phy_detach);
1067 int phy_suspend(struct phy_device *phydev)
1069 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1070 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1073 /* If the device has WOL enabled, we cannot suspend the PHY */
1074 phy_ethtool_get_wol(phydev, &wol);
1078 if (phydrv->suspend)
1079 ret = phydrv->suspend(phydev);
1084 phydev->suspended = true;
1088 EXPORT_SYMBOL(phy_suspend);
1090 int phy_resume(struct phy_device *phydev)
1092 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1096 ret = phydrv->resume(phydev);
1101 phydev->suspended = false;
1105 EXPORT_SYMBOL(phy_resume);
1107 /* Generic PHY support and helper functions */
1110 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1111 * @phydev: target phy_device struct
1113 * Description: Writes MII_ADVERTISE with the appropriate values,
1114 * after sanitizing the values to make sure we only advertise
1115 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1116 * hasn't changed, and > 0 if it has changed.
1118 static int genphy_config_advert(struct phy_device *phydev)
1121 int oldadv, adv, bmsr;
1122 int err, changed = 0;
1124 /* Only allow advertising what this PHY supports */
1125 phydev->advertising &= phydev->supported;
1126 advertise = phydev->advertising;
1128 /* Setup standard advertisement */
1129 adv = phy_read(phydev, MII_ADVERTISE);
1134 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
1135 ADVERTISE_PAUSE_ASYM);
1136 adv |= ethtool_adv_to_mii_adv_t(advertise);
1138 if (adv != oldadv) {
1139 err = phy_write(phydev, MII_ADVERTISE, adv);
1146 bmsr = phy_read(phydev, MII_BMSR);
1150 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1151 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1154 if (!(bmsr & BMSR_ESTATEN))
1157 /* Configure gigabit if it's supported */
1158 adv = phy_read(phydev, MII_CTRL1000);
1163 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
1165 if (phydev->supported & (SUPPORTED_1000baseT_Half |
1166 SUPPORTED_1000baseT_Full)) {
1167 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
1173 err = phy_write(phydev, MII_CTRL1000, adv);
1181 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1182 * @phydev: target phy_device struct
1184 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1185 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1186 * changed, and 1 if it has changed.
1188 static int genphy_config_eee_advert(struct phy_device *phydev)
1190 int broken = phydev->eee_broken_modes;
1193 /* Nothing to disable */
1197 /* If the following call fails, we assume that EEE is not
1198 * supported by the phy. If we read 0, EEE is not advertised
1199 * In both case, we don't need to continue
1201 adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
1208 /* Advertising remains unchanged with the broken mask */
1212 phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, adv);
1218 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1219 * @phydev: target phy_device struct
1221 * Description: Configures MII_BMCR to force speed/duplex
1222 * to the values in phydev. Assumes that the values are valid.
1223 * Please see phy_sanitize_settings().
1225 int genphy_setup_forced(struct phy_device *phydev)
1227 int ctl = phy_read(phydev, MII_BMCR);
1229 ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN;
1231 phydev->asym_pause = 0;
1233 if (SPEED_1000 == phydev->speed)
1234 ctl |= BMCR_SPEED1000;
1235 else if (SPEED_100 == phydev->speed)
1236 ctl |= BMCR_SPEED100;
1238 if (DUPLEX_FULL == phydev->duplex)
1239 ctl |= BMCR_FULLDPLX;
1241 return phy_write(phydev, MII_BMCR, ctl);
1243 EXPORT_SYMBOL(genphy_setup_forced);
1246 * genphy_restart_aneg - Enable and Restart Autonegotiation
1247 * @phydev: target phy_device struct
1249 int genphy_restart_aneg(struct phy_device *phydev)
1251 int ctl = phy_read(phydev, MII_BMCR);
1256 ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
1258 /* Don't isolate the PHY if we're negotiating */
1259 ctl &= ~BMCR_ISOLATE;
1261 return phy_write(phydev, MII_BMCR, ctl);
1263 EXPORT_SYMBOL(genphy_restart_aneg);
1266 * genphy_config_aneg - restart auto-negotiation or write BMCR
1267 * @phydev: target phy_device struct
1269 * Description: If auto-negotiation is enabled, we configure the
1270 * advertising, and then restart auto-negotiation. If it is not
1271 * enabled, then we write the BMCR.
1273 int genphy_config_aneg(struct phy_device *phydev)
1277 changed = genphy_config_eee_advert(phydev);
1279 if (AUTONEG_ENABLE != phydev->autoneg)
1280 return genphy_setup_forced(phydev);
1282 err = genphy_config_advert(phydev);
1283 if (err < 0) /* error */
1289 /* Advertisement hasn't changed, but maybe aneg was never on to
1290 * begin with? Or maybe phy was isolated?
1292 int ctl = phy_read(phydev, MII_BMCR);
1297 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1298 changed = 1; /* do restart aneg */
1301 /* Only restart aneg if we are advertising something different
1302 * than we were before.
1305 return genphy_restart_aneg(phydev);
1309 EXPORT_SYMBOL(genphy_config_aneg);
1312 * genphy_aneg_done - return auto-negotiation status
1313 * @phydev: target phy_device struct
1315 * Description: Reads the status register and returns 0 either if
1316 * auto-negotiation is incomplete, or if there was an error.
1317 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1319 int genphy_aneg_done(struct phy_device *phydev)
1321 int retval = phy_read(phydev, MII_BMSR);
1323 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1325 EXPORT_SYMBOL(genphy_aneg_done);
1327 static int gen10g_config_aneg(struct phy_device *phydev)
1333 * genphy_update_link - update link status in @phydev
1334 * @phydev: target phy_device struct
1336 * Description: Update the value in phydev->link to reflect the
1337 * current link value. In order to do this, we need to read
1338 * the status register twice, keeping the second value.
1340 int genphy_update_link(struct phy_device *phydev)
1344 /* Do a fake read */
1345 status = phy_read(phydev, MII_BMSR);
1349 /* Read link and autonegotiation status */
1350 status = phy_read(phydev, MII_BMSR);
1354 if ((status & BMSR_LSTATUS) == 0)
1361 EXPORT_SYMBOL(genphy_update_link);
1364 * genphy_read_status - check the link status and update current link state
1365 * @phydev: target phy_device struct
1367 * Description: Check the link, then figure out the current state
1368 * by comparing what we advertise with what the link partner
1369 * advertises. Start by checking the gigabit possibilities,
1370 * then move on to 10/100.
1372 int genphy_read_status(struct phy_device *phydev)
1379 int common_adv_gb = 0;
1381 /* Update the link, but return if there was an error */
1382 err = genphy_update_link(phydev);
1386 phydev->lp_advertising = 0;
1388 if (AUTONEG_ENABLE == phydev->autoneg) {
1389 if (phydev->supported & (SUPPORTED_1000baseT_Half
1390 | SUPPORTED_1000baseT_Full)) {
1391 lpagb = phy_read(phydev, MII_STAT1000);
1395 adv = phy_read(phydev, MII_CTRL1000);
1399 phydev->lp_advertising =
1400 mii_stat1000_to_ethtool_lpa_t(lpagb);
1401 common_adv_gb = lpagb & adv << 2;
1404 lpa = phy_read(phydev, MII_LPA);
1408 phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
1410 adv = phy_read(phydev, MII_ADVERTISE);
1414 common_adv = lpa & adv;
1416 phydev->speed = SPEED_10;
1417 phydev->duplex = DUPLEX_HALF;
1419 phydev->asym_pause = 0;
1421 if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) {
1422 phydev->speed = SPEED_1000;
1424 if (common_adv_gb & LPA_1000FULL)
1425 phydev->duplex = DUPLEX_FULL;
1426 } else if (common_adv & (LPA_100FULL | LPA_100HALF)) {
1427 phydev->speed = SPEED_100;
1429 if (common_adv & LPA_100FULL)
1430 phydev->duplex = DUPLEX_FULL;
1432 if (common_adv & LPA_10FULL)
1433 phydev->duplex = DUPLEX_FULL;
1435 if (phydev->duplex == DUPLEX_FULL) {
1436 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
1437 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
1440 int bmcr = phy_read(phydev, MII_BMCR);
1445 if (bmcr & BMCR_FULLDPLX)
1446 phydev->duplex = DUPLEX_FULL;
1448 phydev->duplex = DUPLEX_HALF;
1450 if (bmcr & BMCR_SPEED1000)
1451 phydev->speed = SPEED_1000;
1452 else if (bmcr & BMCR_SPEED100)
1453 phydev->speed = SPEED_100;
1455 phydev->speed = SPEED_10;
1458 phydev->asym_pause = 0;
1463 EXPORT_SYMBOL(genphy_read_status);
1465 static int gen10g_read_status(struct phy_device *phydev)
1468 u32 mmd_mask = phydev->c45_ids.devices_in_package;
1472 /* For now just lie and say it's 10G all the time */
1473 phydev->speed = SPEED_10000;
1474 phydev->duplex = DUPLEX_FULL;
1476 for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) {
1477 if (!(mmd_mask & 1))
1480 /* Read twice because link state is latched and a
1481 * read moves the current state into the register
1483 phy_read_mmd(phydev, devad, MDIO_STAT1);
1484 reg = phy_read_mmd(phydev, devad, MDIO_STAT1);
1485 if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
1493 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1494 * @phydev: target phy_device struct
1496 * Description: Perform a software PHY reset using the standard
1497 * BMCR_RESET bit and poll for the reset bit to be cleared.
1499 * Returns: 0 on success, < 0 on failure
1501 int genphy_soft_reset(struct phy_device *phydev)
1505 ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
1509 return phy_poll_reset(phydev);
1511 EXPORT_SYMBOL(genphy_soft_reset);
1513 int genphy_config_init(struct phy_device *phydev)
1518 features = (SUPPORTED_TP | SUPPORTED_MII
1519 | SUPPORTED_AUI | SUPPORTED_FIBRE |
1520 SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1522 /* Do we support autonegotiation? */
1523 val = phy_read(phydev, MII_BMSR);
1527 if (val & BMSR_ANEGCAPABLE)
1528 features |= SUPPORTED_Autoneg;
1530 if (val & BMSR_100FULL)
1531 features |= SUPPORTED_100baseT_Full;
1532 if (val & BMSR_100HALF)
1533 features |= SUPPORTED_100baseT_Half;
1534 if (val & BMSR_10FULL)
1535 features |= SUPPORTED_10baseT_Full;
1536 if (val & BMSR_10HALF)
1537 features |= SUPPORTED_10baseT_Half;
1539 if (val & BMSR_ESTATEN) {
1540 val = phy_read(phydev, MII_ESTATUS);
1544 if (val & ESTATUS_1000_TFULL)
1545 features |= SUPPORTED_1000baseT_Full;
1546 if (val & ESTATUS_1000_THALF)
1547 features |= SUPPORTED_1000baseT_Half;
1550 phydev->supported &= features;
1551 phydev->advertising &= features;
1556 static int gen10g_soft_reset(struct phy_device *phydev)
1558 /* Do nothing for now */
1561 EXPORT_SYMBOL(genphy_config_init);
1563 static int gen10g_config_init(struct phy_device *phydev)
1565 /* Temporarily just say we support everything */
1566 phydev->supported = SUPPORTED_10000baseT_Full;
1567 phydev->advertising = SUPPORTED_10000baseT_Full;
1572 int genphy_suspend(struct phy_device *phydev)
1576 mutex_lock(&phydev->lock);
1578 value = phy_read(phydev, MII_BMCR);
1579 phy_write(phydev, MII_BMCR, value | BMCR_PDOWN);
1581 mutex_unlock(&phydev->lock);
1585 EXPORT_SYMBOL(genphy_suspend);
1587 static int gen10g_suspend(struct phy_device *phydev)
1592 int genphy_resume(struct phy_device *phydev)
1596 mutex_lock(&phydev->lock);
1598 value = phy_read(phydev, MII_BMCR);
1599 phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN);
1601 mutex_unlock(&phydev->lock);
1605 EXPORT_SYMBOL(genphy_resume);
1607 static int gen10g_resume(struct phy_device *phydev)
1612 static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
1614 /* The default values for phydev->supported are provided by the PHY
1615 * driver "features" member, we want to reset to sane defaults first
1616 * before supporting higher speeds.
1618 phydev->supported &= PHY_DEFAULT_FEATURES;
1620 switch (max_speed) {
1624 phydev->supported |= PHY_1000BT_FEATURES;
1627 phydev->supported |= PHY_100BT_FEATURES;
1630 phydev->supported |= PHY_10BT_FEATURES;
1636 int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
1640 err = __set_phy_supported(phydev, max_speed);
1644 phydev->advertising = phydev->supported;
1648 EXPORT_SYMBOL(phy_set_max_speed);
1650 static void of_set_phy_supported(struct phy_device *phydev)
1652 struct device_node *node = phydev->mdio.dev.of_node;
1655 if (!IS_ENABLED(CONFIG_OF_MDIO))
1661 if (!of_property_read_u32(node, "max-speed", &max_speed))
1662 __set_phy_supported(phydev, max_speed);
1665 static void of_set_phy_eee_broken(struct phy_device *phydev)
1667 struct device_node *node = phydev->mdio.dev.of_node;
1670 if (!IS_ENABLED(CONFIG_OF_MDIO))
1676 if (of_property_read_bool(node, "eee-broken-100tx"))
1677 broken |= MDIO_EEE_100TX;
1678 if (of_property_read_bool(node, "eee-broken-1000t"))
1679 broken |= MDIO_EEE_1000T;
1680 if (of_property_read_bool(node, "eee-broken-10gt"))
1681 broken |= MDIO_EEE_10GT;
1682 if (of_property_read_bool(node, "eee-broken-1000kx"))
1683 broken |= MDIO_EEE_1000KX;
1684 if (of_property_read_bool(node, "eee-broken-10gkx4"))
1685 broken |= MDIO_EEE_10GKX4;
1686 if (of_property_read_bool(node, "eee-broken-10gkr"))
1687 broken |= MDIO_EEE_10GKR;
1689 phydev->eee_broken_modes = broken;
1693 * phy_probe - probe and init a PHY device
1694 * @dev: device to probe and init
1696 * Description: Take care of setting up the phy_device structure,
1697 * set the state to READY (the driver's init function should
1698 * set it to STARTING if needed).
1700 static int phy_probe(struct device *dev)
1702 struct phy_device *phydev = to_phy_device(dev);
1703 struct device_driver *drv = phydev->mdio.dev.driver;
1704 struct phy_driver *phydrv = to_phy_driver(drv);
1707 phydev->drv = phydrv;
1709 /* Disable the interrupt if the PHY doesn't support it
1710 * but the interrupt is still a valid one
1712 if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
1713 phy_interrupt_is_valid(phydev))
1714 phydev->irq = PHY_POLL;
1716 if (phydrv->flags & PHY_IS_INTERNAL)
1717 phydev->is_internal = true;
1719 mutex_lock(&phydev->lock);
1721 /* Start out supporting everything. Eventually,
1722 * a controller will attach, and may modify one
1723 * or both of these values
1725 phydev->supported = phydrv->features;
1726 of_set_phy_supported(phydev);
1727 phydev->advertising = phydev->supported;
1729 /* Get the EEE modes we want to prohibit. We will ask
1730 * the PHY stop advertising these mode later on
1732 of_set_phy_eee_broken(phydev);
1734 /* The Pause Frame bits indicate that the PHY can support passing
1735 * pause frames. During autonegotiation, the PHYs will determine if
1736 * they should allow pause frames to pass. The MAC driver should then
1737 * use that result to determine whether to enable flow control via
1740 * Normally, PHY drivers should not set the Pause bits, and instead
1741 * allow phylib to do that. However, there may be some situations
1742 * (e.g. hardware erratum) where the driver wants to set only one
1745 if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) {
1746 phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1747 phydev->supported |= phydrv->features &
1748 (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1750 phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
1753 /* Set the state to READY by default */
1754 phydev->state = PHY_READY;
1756 if (phydev->drv->probe)
1757 err = phydev->drv->probe(phydev);
1759 mutex_unlock(&phydev->lock);
1764 static int phy_remove(struct device *dev)
1766 struct phy_device *phydev = to_phy_device(dev);
1768 mutex_lock(&phydev->lock);
1769 phydev->state = PHY_DOWN;
1770 mutex_unlock(&phydev->lock);
1772 if (phydev->drv->remove)
1773 phydev->drv->remove(phydev);
1780 * phy_driver_register - register a phy_driver with the PHY layer
1781 * @new_driver: new phy_driver to register
1782 * @owner: module owning this PHY
1784 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
1788 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
1789 new_driver->mdiodrv.driver.name = new_driver->name;
1790 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
1791 new_driver->mdiodrv.driver.probe = phy_probe;
1792 new_driver->mdiodrv.driver.remove = phy_remove;
1793 new_driver->mdiodrv.driver.owner = owner;
1795 retval = driver_register(&new_driver->mdiodrv.driver);
1797 pr_err("%s: Error %d in registering driver\n",
1798 new_driver->name, retval);
1803 pr_debug("%s: Registered new driver\n", new_driver->name);
1807 EXPORT_SYMBOL(phy_driver_register);
1809 int phy_drivers_register(struct phy_driver *new_driver, int n,
1810 struct module *owner)
1814 for (i = 0; i < n; i++) {
1815 ret = phy_driver_register(new_driver + i, owner);
1818 phy_driver_unregister(new_driver + i);
1824 EXPORT_SYMBOL(phy_drivers_register);
1826 void phy_driver_unregister(struct phy_driver *drv)
1828 driver_unregister(&drv->mdiodrv.driver);
1830 EXPORT_SYMBOL(phy_driver_unregister);
1832 void phy_drivers_unregister(struct phy_driver *drv, int n)
1836 for (i = 0; i < n; i++)
1837 phy_driver_unregister(drv + i);
1839 EXPORT_SYMBOL(phy_drivers_unregister);
1841 static struct phy_driver genphy_driver[] = {
1843 .phy_id = 0xffffffff,
1844 .phy_id_mask = 0xffffffff,
1845 .name = "Generic PHY",
1846 .soft_reset = genphy_soft_reset,
1847 .config_init = genphy_config_init,
1848 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
1849 SUPPORTED_AUI | SUPPORTED_FIBRE |
1851 .config_aneg = genphy_config_aneg,
1852 .aneg_done = genphy_aneg_done,
1853 .read_status = genphy_read_status,
1854 .suspend = genphy_suspend,
1855 .resume = genphy_resume,
1857 .phy_id = 0xffffffff,
1858 .phy_id_mask = 0xffffffff,
1859 .name = "Generic 10G PHY",
1860 .soft_reset = gen10g_soft_reset,
1861 .config_init = gen10g_config_init,
1863 .config_aneg = gen10g_config_aneg,
1864 .read_status = gen10g_read_status,
1865 .suspend = gen10g_suspend,
1866 .resume = gen10g_resume,
1869 static int __init phy_init(void)
1873 rc = mdio_bus_init();
1877 rc = phy_drivers_register(genphy_driver,
1878 ARRAY_SIZE(genphy_driver), THIS_MODULE);
1885 static void __exit phy_exit(void)
1887 phy_drivers_unregister(genphy_driver,
1888 ARRAY_SIZE(genphy_driver));
1892 subsys_initcall(phy_init);
1893 module_exit(phy_exit);