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;
911 bool using_genphy = false;
914 /* For Ethernet device drivers that register their own MDIO bus, we
915 * will have bus->owner match ndev_mod, so we do not want to increment
916 * our own module->refcnt here, otherwise we would not be able to
919 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
920 dev_err(&dev->dev, "failed to get the bus module\n");
926 /* Assume that if there is no driver, that it doesn't
927 * exist, and we should use the genphy driver.
932 &genphy_driver[GENPHY_DRV_10G].mdiodrv.driver;
935 &genphy_driver[GENPHY_DRV_1G].mdiodrv.driver;
940 if (!try_module_get(d->driver->owner)) {
941 dev_err(&dev->dev, "failed to get the device driver module\n");
943 goto error_put_device;
947 err = d->driver->probe(d);
949 err = device_bind_driver(d);
952 goto error_module_put;
955 if (phydev->attached_dev) {
956 dev_err(&dev->dev, "PHY already attached\n");
961 phydev->attached_dev = dev;
962 dev->phydev = phydev;
964 /* Some Ethernet drivers try to connect to a PHY device before
965 * calling register_netdevice() -> netdev_register_kobject() and
966 * does the dev->dev.kobj initialization. Here we only check for
967 * success which indicates that the network device kobject is
968 * ready. Once we do that we still need to keep track of whether
969 * links were successfully set up or not for phy_detach() to
970 * remove them accordingly.
972 phydev->sysfs_links = false;
974 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
977 err = sysfs_create_link(&dev->dev.kobj, &phydev->mdio.dev.kobj,
982 phydev->sysfs_links = true;
985 phydev->dev_flags = flags;
987 phydev->interface = interface;
989 phydev->state = PHY_READY;
991 /* Initial carrier state is off as the phy is about to be
994 netif_carrier_off(phydev->attached_dev);
996 /* Do initial configuration here, now that
997 * we have certain key parameters
998 * (dev_flags and interface)
1000 err = phy_init_hw(phydev);
1005 phy_led_triggers_register(phydev);
1010 /* phy_detach() does all of the cleanup below */
1015 module_put(d->driver->owner);
1018 if (ndev_owner != bus->owner)
1019 module_put(bus->owner);
1022 EXPORT_SYMBOL(phy_attach_direct);
1025 * phy_attach - attach a network device to a particular PHY device
1026 * @dev: network device to attach
1027 * @bus_id: Bus ID of PHY device to attach
1028 * @interface: PHY device's interface
1030 * Description: Same as phy_attach_direct() except that a PHY bus_id
1031 * string is passed instead of a pointer to a struct phy_device.
1033 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1034 phy_interface_t interface)
1036 struct bus_type *bus = &mdio_bus_type;
1037 struct phy_device *phydev;
1041 /* Search the list of PHY devices on the mdio bus for the
1042 * PHY with the requested name
1044 d = bus_find_device_by_name(bus, NULL, bus_id);
1046 pr_err("PHY %s not found\n", bus_id);
1047 return ERR_PTR(-ENODEV);
1049 phydev = to_phy_device(d);
1051 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1058 EXPORT_SYMBOL(phy_attach);
1061 * phy_detach - detach a PHY device from its network device
1062 * @phydev: target phy_device struct
1064 * This detaches the phy device from its network device and the phy
1065 * driver, and drops the reference count taken in phy_attach_direct().
1067 void phy_detach(struct phy_device *phydev)
1069 struct net_device *dev = phydev->attached_dev;
1070 struct module *ndev_owner = dev->dev.parent->driver->owner;
1071 struct mii_bus *bus;
1074 if (phydev->sysfs_links) {
1075 sysfs_remove_link(&dev->dev.kobj, "phydev");
1076 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1078 phydev->attached_dev->phydev = NULL;
1079 phydev->attached_dev = NULL;
1080 phy_suspend(phydev);
1082 phy_led_triggers_unregister(phydev);
1084 module_put(phydev->mdio.dev.driver->owner);
1086 /* If the device had no specific driver before (i.e. - it
1087 * was using the generic driver), we unbind the device
1088 * from the generic driver so that there's a chance a
1089 * real driver could be loaded
1091 for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) {
1092 if (phydev->mdio.dev.driver ==
1093 &genphy_driver[i].mdiodrv.driver) {
1094 device_release_driver(&phydev->mdio.dev);
1100 * The phydev might go away on the put_device() below, so avoid
1101 * a use-after-free bug by reading the underlying bus first.
1103 bus = phydev->mdio.bus;
1105 put_device(&phydev->mdio.dev);
1106 if (ndev_owner != bus->owner)
1107 module_put(bus->owner);
1109 EXPORT_SYMBOL(phy_detach);
1111 int phy_suspend(struct phy_device *phydev)
1113 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1114 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1117 /* If the device has WOL enabled, we cannot suspend the PHY */
1118 phy_ethtool_get_wol(phydev, &wol);
1122 if (phydev->drv && phydrv->suspend)
1123 ret = phydrv->suspend(phydev);
1128 phydev->suspended = true;
1132 EXPORT_SYMBOL(phy_suspend);
1134 int phy_resume(struct phy_device *phydev)
1136 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1139 if (phydev->drv && phydrv->resume)
1140 ret = phydrv->resume(phydev);
1145 phydev->suspended = false;
1149 EXPORT_SYMBOL(phy_resume);
1151 /* Generic PHY support and helper functions */
1154 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1155 * @phydev: target phy_device struct
1157 * Description: Writes MII_ADVERTISE with the appropriate values,
1158 * after sanitizing the values to make sure we only advertise
1159 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1160 * hasn't changed, and > 0 if it has changed.
1162 static int genphy_config_advert(struct phy_device *phydev)
1165 int oldadv, adv, bmsr;
1166 int err, changed = 0;
1168 /* Only allow advertising what this PHY supports */
1169 phydev->advertising &= phydev->supported;
1170 advertise = phydev->advertising;
1172 /* Setup standard advertisement */
1173 adv = phy_read(phydev, MII_ADVERTISE);
1178 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
1179 ADVERTISE_PAUSE_ASYM);
1180 adv |= ethtool_adv_to_mii_adv_t(advertise);
1182 if (adv != oldadv) {
1183 err = phy_write(phydev, MII_ADVERTISE, adv);
1190 bmsr = phy_read(phydev, MII_BMSR);
1194 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1195 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1198 if (!(bmsr & BMSR_ESTATEN))
1201 /* Configure gigabit if it's supported */
1202 adv = phy_read(phydev, MII_CTRL1000);
1207 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
1209 if (phydev->supported & (SUPPORTED_1000baseT_Half |
1210 SUPPORTED_1000baseT_Full)) {
1211 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
1217 err = phy_write(phydev, MII_CTRL1000, adv);
1225 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1226 * @phydev: target phy_device struct
1228 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1229 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1230 * changed, and 1 if it has changed.
1232 static int genphy_config_eee_advert(struct phy_device *phydev)
1234 int broken = phydev->eee_broken_modes;
1237 /* Nothing to disable */
1241 /* If the following call fails, we assume that EEE is not
1242 * supported by the phy. If we read 0, EEE is not advertised
1243 * In both case, we don't need to continue
1245 adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1252 /* Advertising remains unchanged with the broken mask */
1256 phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1262 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1263 * @phydev: target phy_device struct
1265 * Description: Configures MII_BMCR to force speed/duplex
1266 * to the values in phydev. Assumes that the values are valid.
1267 * Please see phy_sanitize_settings().
1269 int genphy_setup_forced(struct phy_device *phydev)
1271 int ctl = phy_read(phydev, MII_BMCR);
1273 ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN;
1275 phydev->asym_pause = 0;
1277 if (SPEED_1000 == phydev->speed)
1278 ctl |= BMCR_SPEED1000;
1279 else if (SPEED_100 == phydev->speed)
1280 ctl |= BMCR_SPEED100;
1282 if (DUPLEX_FULL == phydev->duplex)
1283 ctl |= BMCR_FULLDPLX;
1285 return phy_write(phydev, MII_BMCR, ctl);
1287 EXPORT_SYMBOL(genphy_setup_forced);
1290 * genphy_restart_aneg - Enable and Restart Autonegotiation
1291 * @phydev: target phy_device struct
1293 int genphy_restart_aneg(struct phy_device *phydev)
1295 int ctl = phy_read(phydev, MII_BMCR);
1300 ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
1302 /* Don't isolate the PHY if we're negotiating */
1303 ctl &= ~BMCR_ISOLATE;
1305 return phy_write(phydev, MII_BMCR, ctl);
1307 EXPORT_SYMBOL(genphy_restart_aneg);
1310 * genphy_config_aneg - restart auto-negotiation or write BMCR
1311 * @phydev: target phy_device struct
1313 * Description: If auto-negotiation is enabled, we configure the
1314 * advertising, and then restart auto-negotiation. If it is not
1315 * enabled, then we write the BMCR.
1317 int genphy_config_aneg(struct phy_device *phydev)
1321 changed = genphy_config_eee_advert(phydev);
1323 if (AUTONEG_ENABLE != phydev->autoneg)
1324 return genphy_setup_forced(phydev);
1326 err = genphy_config_advert(phydev);
1327 if (err < 0) /* error */
1333 /* Advertisement hasn't changed, but maybe aneg was never on to
1334 * begin with? Or maybe phy was isolated?
1336 int ctl = phy_read(phydev, MII_BMCR);
1341 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1342 changed = 1; /* do restart aneg */
1345 /* Only restart aneg if we are advertising something different
1346 * than we were before.
1349 return genphy_restart_aneg(phydev);
1353 EXPORT_SYMBOL(genphy_config_aneg);
1356 * genphy_aneg_done - return auto-negotiation status
1357 * @phydev: target phy_device struct
1359 * Description: Reads the status register and returns 0 either if
1360 * auto-negotiation is incomplete, or if there was an error.
1361 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1363 int genphy_aneg_done(struct phy_device *phydev)
1365 int retval = phy_read(phydev, MII_BMSR);
1367 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1369 EXPORT_SYMBOL(genphy_aneg_done);
1371 static int gen10g_config_aneg(struct phy_device *phydev)
1377 * genphy_update_link - update link status in @phydev
1378 * @phydev: target phy_device struct
1380 * Description: Update the value in phydev->link to reflect the
1381 * current link value. In order to do this, we need to read
1382 * the status register twice, keeping the second value.
1384 int genphy_update_link(struct phy_device *phydev)
1388 /* Do a fake read */
1389 status = phy_read(phydev, MII_BMSR);
1393 /* Read link and autonegotiation status */
1394 status = phy_read(phydev, MII_BMSR);
1398 if ((status & BMSR_LSTATUS) == 0)
1405 EXPORT_SYMBOL(genphy_update_link);
1408 * genphy_read_status - check the link status and update current link state
1409 * @phydev: target phy_device struct
1411 * Description: Check the link, then figure out the current state
1412 * by comparing what we advertise with what the link partner
1413 * advertises. Start by checking the gigabit possibilities,
1414 * then move on to 10/100.
1416 int genphy_read_status(struct phy_device *phydev)
1423 int common_adv_gb = 0;
1425 /* Update the link, but return if there was an error */
1426 err = genphy_update_link(phydev);
1430 phydev->lp_advertising = 0;
1432 if (AUTONEG_ENABLE == phydev->autoneg) {
1433 if (phydev->supported & (SUPPORTED_1000baseT_Half
1434 | SUPPORTED_1000baseT_Full)) {
1435 lpagb = phy_read(phydev, MII_STAT1000);
1439 adv = phy_read(phydev, MII_CTRL1000);
1443 phydev->lp_advertising =
1444 mii_stat1000_to_ethtool_lpa_t(lpagb);
1445 common_adv_gb = lpagb & adv << 2;
1448 lpa = phy_read(phydev, MII_LPA);
1452 phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
1454 adv = phy_read(phydev, MII_ADVERTISE);
1458 common_adv = lpa & adv;
1460 phydev->speed = SPEED_10;
1461 phydev->duplex = DUPLEX_HALF;
1463 phydev->asym_pause = 0;
1465 if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) {
1466 phydev->speed = SPEED_1000;
1468 if (common_adv_gb & LPA_1000FULL)
1469 phydev->duplex = DUPLEX_FULL;
1470 } else if (common_adv & (LPA_100FULL | LPA_100HALF)) {
1471 phydev->speed = SPEED_100;
1473 if (common_adv & LPA_100FULL)
1474 phydev->duplex = DUPLEX_FULL;
1476 if (common_adv & LPA_10FULL)
1477 phydev->duplex = DUPLEX_FULL;
1479 if (phydev->duplex == DUPLEX_FULL) {
1480 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
1481 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
1484 int bmcr = phy_read(phydev, MII_BMCR);
1489 if (bmcr & BMCR_FULLDPLX)
1490 phydev->duplex = DUPLEX_FULL;
1492 phydev->duplex = DUPLEX_HALF;
1494 if (bmcr & BMCR_SPEED1000)
1495 phydev->speed = SPEED_1000;
1496 else if (bmcr & BMCR_SPEED100)
1497 phydev->speed = SPEED_100;
1499 phydev->speed = SPEED_10;
1502 phydev->asym_pause = 0;
1507 EXPORT_SYMBOL(genphy_read_status);
1509 static int gen10g_read_status(struct phy_device *phydev)
1511 u32 mmd_mask = phydev->c45_ids.devices_in_package;
1514 /* For now just lie and say it's 10G all the time */
1515 phydev->speed = SPEED_10000;
1516 phydev->duplex = DUPLEX_FULL;
1518 /* Avoid reading the vendor MMDs */
1519 mmd_mask &= ~(BIT(MDIO_MMD_VEND1) | BIT(MDIO_MMD_VEND2));
1521 ret = genphy_c45_read_link(phydev, mmd_mask);
1523 phydev->link = ret > 0 ? 1 : 0;
1529 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1530 * @phydev: target phy_device struct
1532 * Description: Perform a software PHY reset using the standard
1533 * BMCR_RESET bit and poll for the reset bit to be cleared.
1535 * Returns: 0 on success, < 0 on failure
1537 int genphy_soft_reset(struct phy_device *phydev)
1541 ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
1545 return phy_poll_reset(phydev);
1547 EXPORT_SYMBOL(genphy_soft_reset);
1549 int genphy_config_init(struct phy_device *phydev)
1554 features = (SUPPORTED_TP | SUPPORTED_MII
1555 | SUPPORTED_AUI | SUPPORTED_FIBRE |
1556 SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1558 /* Do we support autonegotiation? */
1559 val = phy_read(phydev, MII_BMSR);
1563 if (val & BMSR_ANEGCAPABLE)
1564 features |= SUPPORTED_Autoneg;
1566 if (val & BMSR_100FULL)
1567 features |= SUPPORTED_100baseT_Full;
1568 if (val & BMSR_100HALF)
1569 features |= SUPPORTED_100baseT_Half;
1570 if (val & BMSR_10FULL)
1571 features |= SUPPORTED_10baseT_Full;
1572 if (val & BMSR_10HALF)
1573 features |= SUPPORTED_10baseT_Half;
1575 if (val & BMSR_ESTATEN) {
1576 val = phy_read(phydev, MII_ESTATUS);
1580 if (val & ESTATUS_1000_TFULL)
1581 features |= SUPPORTED_1000baseT_Full;
1582 if (val & ESTATUS_1000_THALF)
1583 features |= SUPPORTED_1000baseT_Half;
1586 phydev->supported &= features;
1587 phydev->advertising &= features;
1591 EXPORT_SYMBOL(genphy_config_init);
1593 static int gen10g_soft_reset(struct phy_device *phydev)
1595 /* Do nothing for now */
1599 static int gen10g_config_init(struct phy_device *phydev)
1601 /* Temporarily just say we support everything */
1602 phydev->supported = SUPPORTED_10000baseT_Full;
1603 phydev->advertising = SUPPORTED_10000baseT_Full;
1608 int genphy_suspend(struct phy_device *phydev)
1612 mutex_lock(&phydev->lock);
1614 value = phy_read(phydev, MII_BMCR);
1615 phy_write(phydev, MII_BMCR, value | BMCR_PDOWN);
1617 mutex_unlock(&phydev->lock);
1621 EXPORT_SYMBOL(genphy_suspend);
1623 static int gen10g_suspend(struct phy_device *phydev)
1628 int genphy_resume(struct phy_device *phydev)
1632 mutex_lock(&phydev->lock);
1634 value = phy_read(phydev, MII_BMCR);
1635 phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN);
1637 mutex_unlock(&phydev->lock);
1641 EXPORT_SYMBOL(genphy_resume);
1643 static int gen10g_resume(struct phy_device *phydev)
1648 static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
1650 /* The default values for phydev->supported are provided by the PHY
1651 * driver "features" member, we want to reset to sane defaults first
1652 * before supporting higher speeds.
1654 phydev->supported &= PHY_DEFAULT_FEATURES;
1656 switch (max_speed) {
1660 phydev->supported |= PHY_1000BT_FEATURES;
1663 phydev->supported |= PHY_100BT_FEATURES;
1666 phydev->supported |= PHY_10BT_FEATURES;
1672 int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
1676 err = __set_phy_supported(phydev, max_speed);
1680 phydev->advertising = phydev->supported;
1684 EXPORT_SYMBOL(phy_set_max_speed);
1686 static void of_set_phy_supported(struct phy_device *phydev)
1688 struct device_node *node = phydev->mdio.dev.of_node;
1691 if (!IS_ENABLED(CONFIG_OF_MDIO))
1697 if (!of_property_read_u32(node, "max-speed", &max_speed))
1698 __set_phy_supported(phydev, max_speed);
1701 static void of_set_phy_eee_broken(struct phy_device *phydev)
1703 struct device_node *node = phydev->mdio.dev.of_node;
1706 if (!IS_ENABLED(CONFIG_OF_MDIO))
1712 if (of_property_read_bool(node, "eee-broken-100tx"))
1713 broken |= MDIO_EEE_100TX;
1714 if (of_property_read_bool(node, "eee-broken-1000t"))
1715 broken |= MDIO_EEE_1000T;
1716 if (of_property_read_bool(node, "eee-broken-10gt"))
1717 broken |= MDIO_EEE_10GT;
1718 if (of_property_read_bool(node, "eee-broken-1000kx"))
1719 broken |= MDIO_EEE_1000KX;
1720 if (of_property_read_bool(node, "eee-broken-10gkx4"))
1721 broken |= MDIO_EEE_10GKX4;
1722 if (of_property_read_bool(node, "eee-broken-10gkr"))
1723 broken |= MDIO_EEE_10GKR;
1725 phydev->eee_broken_modes = broken;
1729 * phy_probe - probe and init a PHY device
1730 * @dev: device to probe and init
1732 * Description: Take care of setting up the phy_device structure,
1733 * set the state to READY (the driver's init function should
1734 * set it to STARTING if needed).
1736 static int phy_probe(struct device *dev)
1738 struct phy_device *phydev = to_phy_device(dev);
1739 struct device_driver *drv = phydev->mdio.dev.driver;
1740 struct phy_driver *phydrv = to_phy_driver(drv);
1743 phydev->drv = phydrv;
1745 /* Disable the interrupt if the PHY doesn't support it
1746 * but the interrupt is still a valid one
1748 if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
1749 phy_interrupt_is_valid(phydev))
1750 phydev->irq = PHY_POLL;
1752 if (phydrv->flags & PHY_IS_INTERNAL)
1753 phydev->is_internal = true;
1755 mutex_lock(&phydev->lock);
1757 /* Start out supporting everything. Eventually,
1758 * a controller will attach, and may modify one
1759 * or both of these values
1761 phydev->supported = phydrv->features;
1762 of_set_phy_supported(phydev);
1763 phydev->advertising = phydev->supported;
1765 /* Get the EEE modes we want to prohibit. We will ask
1766 * the PHY stop advertising these mode later on
1768 of_set_phy_eee_broken(phydev);
1770 /* The Pause Frame bits indicate that the PHY can support passing
1771 * pause frames. During autonegotiation, the PHYs will determine if
1772 * they should allow pause frames to pass. The MAC driver should then
1773 * use that result to determine whether to enable flow control via
1776 * Normally, PHY drivers should not set the Pause bits, and instead
1777 * allow phylib to do that. However, there may be some situations
1778 * (e.g. hardware erratum) where the driver wants to set only one
1781 if (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) {
1782 phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1783 phydev->supported |= phydrv->features &
1784 (SUPPORTED_Pause | SUPPORTED_Asym_Pause);
1786 phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
1789 /* Set the state to READY by default */
1790 phydev->state = PHY_READY;
1792 if (phydev->drv->probe)
1793 err = phydev->drv->probe(phydev);
1795 mutex_unlock(&phydev->lock);
1800 static int phy_remove(struct device *dev)
1802 struct phy_device *phydev = to_phy_device(dev);
1804 cancel_delayed_work_sync(&phydev->state_queue);
1806 mutex_lock(&phydev->lock);
1807 phydev->state = PHY_DOWN;
1808 mutex_unlock(&phydev->lock);
1810 if (phydev->drv && phydev->drv->remove)
1811 phydev->drv->remove(phydev);
1818 * phy_driver_register - register a phy_driver with the PHY layer
1819 * @new_driver: new phy_driver to register
1820 * @owner: module owning this PHY
1822 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
1826 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
1827 new_driver->mdiodrv.driver.name = new_driver->name;
1828 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
1829 new_driver->mdiodrv.driver.probe = phy_probe;
1830 new_driver->mdiodrv.driver.remove = phy_remove;
1831 new_driver->mdiodrv.driver.owner = owner;
1833 retval = driver_register(&new_driver->mdiodrv.driver);
1835 pr_err("%s: Error %d in registering driver\n",
1836 new_driver->name, retval);
1841 pr_debug("%s: Registered new driver\n", new_driver->name);
1845 EXPORT_SYMBOL(phy_driver_register);
1847 int phy_drivers_register(struct phy_driver *new_driver, int n,
1848 struct module *owner)
1852 for (i = 0; i < n; i++) {
1853 ret = phy_driver_register(new_driver + i, owner);
1856 phy_driver_unregister(new_driver + i);
1862 EXPORT_SYMBOL(phy_drivers_register);
1864 void phy_driver_unregister(struct phy_driver *drv)
1866 driver_unregister(&drv->mdiodrv.driver);
1868 EXPORT_SYMBOL(phy_driver_unregister);
1870 void phy_drivers_unregister(struct phy_driver *drv, int n)
1874 for (i = 0; i < n; i++)
1875 phy_driver_unregister(drv + i);
1877 EXPORT_SYMBOL(phy_drivers_unregister);
1879 static struct phy_driver genphy_driver[] = {
1881 .phy_id = 0xffffffff,
1882 .phy_id_mask = 0xffffffff,
1883 .name = "Generic PHY",
1884 .soft_reset = genphy_no_soft_reset,
1885 .config_init = genphy_config_init,
1886 .features = PHY_GBIT_FEATURES | SUPPORTED_MII |
1887 SUPPORTED_AUI | SUPPORTED_FIBRE |
1889 .config_aneg = genphy_config_aneg,
1890 .aneg_done = genphy_aneg_done,
1891 .read_status = genphy_read_status,
1892 .suspend = genphy_suspend,
1893 .resume = genphy_resume,
1895 .phy_id = 0xffffffff,
1896 .phy_id_mask = 0xffffffff,
1897 .name = "Generic 10G PHY",
1898 .soft_reset = gen10g_soft_reset,
1899 .config_init = gen10g_config_init,
1901 .config_aneg = gen10g_config_aneg,
1902 .read_status = gen10g_read_status,
1903 .suspend = gen10g_suspend,
1904 .resume = gen10g_resume,
1907 static int __init phy_init(void)
1911 rc = mdio_bus_init();
1915 rc = phy_drivers_register(genphy_driver,
1916 ARRAY_SIZE(genphy_driver), THIS_MODULE);
1923 static void __exit phy_exit(void)
1925 phy_drivers_unregister(genphy_driver,
1926 ARRAY_SIZE(genphy_driver));
1930 subsys_initcall(phy_init);
1931 module_exit(phy_exit);