2 * drivers/net/phy/phy_device.c
4 * Framework for finding and configuring PHYs.
5 * Also contains generic PHY driver
9 * Copyright (c) 2004 Freescale Semiconductor, Inc.
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
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>
36 #include <asm/uaccess.h>
38 MODULE_DESCRIPTION("PHY library");
39 MODULE_AUTHOR("Andy Fleming");
40 MODULE_LICENSE("GPL");
42 void phy_device_free(struct phy_device *phydev)
46 EXPORT_SYMBOL(phy_device_free);
48 static void phy_device_release(struct device *dev)
50 phy_device_free(to_phy_device(dev));
53 static struct phy_driver genphy_driver;
54 extern int mdio_bus_init(void);
55 extern void mdio_bus_exit(void);
57 static LIST_HEAD(phy_fixup_list);
58 static DEFINE_MUTEX(phy_fixup_lock);
61 * Creates a new phy_fixup and adds it to the list
62 * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID)
63 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
64 * It can also be PHY_ANY_UID
65 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
67 * @run: The actual code to be run when a matching PHY is found
69 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
70 int (*run)(struct phy_device *))
72 struct phy_fixup *fixup;
74 fixup = kzalloc(sizeof(struct phy_fixup), GFP_KERNEL);
78 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
79 fixup->phy_uid = phy_uid;
80 fixup->phy_uid_mask = phy_uid_mask;
83 mutex_lock(&phy_fixup_lock);
84 list_add_tail(&fixup->list, &phy_fixup_list);
85 mutex_unlock(&phy_fixup_lock);
89 EXPORT_SYMBOL(phy_register_fixup);
91 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
92 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
93 int (*run)(struct phy_device *))
95 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
97 EXPORT_SYMBOL(phy_register_fixup_for_uid);
99 /* Registers a fixup to be run on the PHY with id string bus_id */
100 int phy_register_fixup_for_id(const char *bus_id,
101 int (*run)(struct phy_device *))
103 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
105 EXPORT_SYMBOL(phy_register_fixup_for_id);
108 * Returns 1 if fixup matches phydev in bus_id and phy_uid.
109 * Fixups can be set to match any in one or more fields.
111 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
113 if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0)
114 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
117 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
118 (phydev->phy_id & fixup->phy_uid_mask))
119 if (fixup->phy_uid != PHY_ANY_UID)
125 /* Runs any matching fixups for this phydev */
126 int phy_scan_fixups(struct phy_device *phydev)
128 struct phy_fixup *fixup;
130 mutex_lock(&phy_fixup_lock);
131 list_for_each_entry(fixup, &phy_fixup_list, list) {
132 if (phy_needs_fixup(phydev, fixup)) {
135 err = fixup->run(phydev);
138 mutex_unlock(&phy_fixup_lock);
143 mutex_unlock(&phy_fixup_lock);
147 EXPORT_SYMBOL(phy_scan_fixups);
149 struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id)
151 struct phy_device *dev;
152 /* We allocate the device, and initialize the
154 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
157 return (struct phy_device*) PTR_ERR((void*)-ENOMEM);
159 dev->dev.release = phy_device_release;
163 dev->pause = dev->asym_pause = 0;
165 dev->interface = PHY_INTERFACE_MODE_GMII;
167 dev->autoneg = AUTONEG_ENABLE;
170 dev->phy_id = phy_id;
172 dev->dev.parent = bus->parent;
173 dev->dev.bus = &mdio_bus_type;
174 dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
175 dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr);
177 dev->state = PHY_DOWN;
179 mutex_init(&dev->lock);
180 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
184 EXPORT_SYMBOL(phy_device_create);
187 * get_phy_id - reads the specified addr for its ID.
188 * @bus: the target MII bus
189 * @addr: PHY address on the MII bus
190 * @phy_id: where to store the ID retrieved.
192 * Description: Reads the ID registers of the PHY at @addr on the
193 * @bus, stores it in @phy_id and returns zero on success.
195 int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id)
199 /* Grab the bits from PHYIR1, and put them
200 * in the upper half */
201 phy_reg = bus->read(bus, addr, MII_PHYSID1);
206 *phy_id = (phy_reg & 0xffff) << 16;
208 /* Grab the bits from PHYIR2, and put them in the lower half */
209 phy_reg = bus->read(bus, addr, MII_PHYSID2);
214 *phy_id |= (phy_reg & 0xffff);
218 EXPORT_SYMBOL(get_phy_id);
221 * get_phy_device - reads the specified PHY device and returns its @phy_device struct
222 * @bus: the target MII bus
223 * @addr: PHY address on the MII bus
225 * Description: Reads the ID registers of the PHY at @addr on the
226 * @bus, then allocates and returns the phy_device to represent it.
228 struct phy_device * get_phy_device(struct mii_bus *bus, int addr)
230 struct phy_device *dev = NULL;
234 r = get_phy_id(bus, addr, &phy_id);
238 /* If the phy_id is mostly Fs, there is no device there */
239 if ((phy_id & 0x1fffffff) == 0x1fffffff)
242 dev = phy_device_create(bus, addr, phy_id);
246 EXPORT_SYMBOL(get_phy_device);
249 * phy_device_register - Register the phy device on the MDIO bus
250 * @phydev: phy_device structure to be added to the MDIO bus
252 int phy_device_register(struct phy_device *phydev)
256 /* Don't register a phy if one is already registered at this
258 if (phydev->bus->phy_map[phydev->addr])
260 phydev->bus->phy_map[phydev->addr] = phydev;
262 /* Run all of the fixups for this PHY */
263 phy_scan_fixups(phydev);
265 err = device_register(&phydev->dev);
267 pr_err("phy %d failed to register\n", phydev->addr);
274 phydev->bus->phy_map[phydev->addr] = NULL;
277 EXPORT_SYMBOL(phy_device_register);
280 * phy_prepare_link - prepares the PHY layer to monitor link status
281 * @phydev: target phy_device struct
282 * @handler: callback function for link status change notifications
284 * Description: Tells the PHY infrastructure to handle the
285 * gory details on monitoring link status (whether through
286 * polling or an interrupt), and to call back to the
287 * connected device driver when the link status changes.
288 * If you want to monitor your own link state, don't call
291 void phy_prepare_link(struct phy_device *phydev,
292 void (*handler)(struct net_device *))
294 phydev->adjust_link = handler;
298 * phy_connect_direct - connect an ethernet device to a specific phy_device
299 * @dev: the network device to connect
300 * @phydev: the pointer to the phy device
301 * @handler: callback function for state change notifications
302 * @flags: PHY device's dev_flags
303 * @interface: PHY device's interface
305 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
306 void (*handler)(struct net_device *), u32 flags,
307 phy_interface_t interface)
311 rc = phy_attach_direct(dev, phydev, flags, interface);
315 phy_prepare_link(phydev, handler);
316 phy_start_machine(phydev, NULL);
318 phy_start_interrupts(phydev);
322 EXPORT_SYMBOL(phy_connect_direct);
325 * phy_connect - connect an ethernet device to a PHY device
326 * @dev: the network device to connect
327 * @bus_id: the id string of the PHY device to connect
328 * @handler: callback function for state change notifications
329 * @flags: PHY device's dev_flags
330 * @interface: PHY device's interface
332 * Description: Convenience function for connecting ethernet
333 * devices to PHY devices. The default behavior is for
334 * the PHY infrastructure to handle everything, and only notify
335 * the connected driver when the link status changes. If you
336 * don't want, or can't use the provided functionality, you may
337 * choose to call only the subset of functions which provide
338 * the desired functionality.
340 struct phy_device * phy_connect(struct net_device *dev, const char *bus_id,
341 void (*handler)(struct net_device *), u32 flags,
342 phy_interface_t interface)
344 struct phy_device *phydev;
348 /* Search the list of PHY devices on the mdio bus for the
349 * PHY with the requested name */
350 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
352 pr_err("PHY %s not found\n", bus_id);
353 return ERR_PTR(-ENODEV);
355 phydev = to_phy_device(d);
357 rc = phy_connect_direct(dev, phydev, handler, flags, interface);
363 EXPORT_SYMBOL(phy_connect);
366 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY device
367 * @phydev: target phy_device struct
369 void phy_disconnect(struct phy_device *phydev)
372 phy_stop_interrupts(phydev);
374 phy_stop_machine(phydev);
376 phydev->adjust_link = NULL;
380 EXPORT_SYMBOL(phy_disconnect);
382 int phy_init_hw(struct phy_device *phydev)
386 if (!phydev->drv || !phydev->drv->config_init)
389 ret = phy_scan_fixups(phydev);
393 return phydev->drv->config_init(phydev);
397 * phy_attach_direct - attach a network device to a given PHY device pointer
398 * @dev: network device to attach
399 * @phydev: Pointer to phy_device to attach
400 * @flags: PHY device's dev_flags
401 * @interface: PHY device's interface
403 * Description: Called by drivers to attach to a particular PHY
404 * device. The phy_device is found, and properly hooked up
405 * to the phy_driver. If no driver is attached, then the
406 * genphy_driver is used. The phy_device is given a ptr to
407 * the attaching device, and given a callback for link status
408 * change. The phy_device is returned to the attaching driver.
410 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
411 u32 flags, phy_interface_t interface)
413 struct device *d = &phydev->dev;
415 /* Assume that if there is no driver, that it doesn't
416 * exist, and we should use the genphy driver. */
417 if (NULL == d->driver) {
419 d->driver = &genphy_driver.driver;
421 err = d->driver->probe(d);
423 err = device_bind_driver(d);
429 if (phydev->attached_dev) {
430 dev_err(&dev->dev, "PHY already attached\n");
434 phydev->attached_dev = dev;
436 phydev->dev_flags = flags;
438 phydev->interface = interface;
440 /* Do initial configuration here, now that
441 * we have certain key parameters
442 * (dev_flags and interface) */
443 return phy_init_hw(phydev);
445 EXPORT_SYMBOL(phy_attach_direct);
448 * phy_attach - attach a network device to a particular PHY device
449 * @dev: network device to attach
450 * @bus_id: Bus ID of PHY device to attach
451 * @flags: PHY device's dev_flags
452 * @interface: PHY device's interface
454 * Description: Same as phy_attach_direct() except that a PHY bus_id
455 * string is passed instead of a pointer to a struct phy_device.
457 struct phy_device *phy_attach(struct net_device *dev,
458 const char *bus_id, u32 flags, phy_interface_t interface)
460 struct bus_type *bus = &mdio_bus_type;
461 struct phy_device *phydev;
465 /* Search the list of PHY devices on the mdio bus for the
466 * PHY with the requested name */
467 d = bus_find_device_by_name(bus, NULL, bus_id);
469 pr_err("PHY %s not found\n", bus_id);
470 return ERR_PTR(-ENODEV);
472 phydev = to_phy_device(d);
474 rc = phy_attach_direct(dev, phydev, flags, interface);
480 EXPORT_SYMBOL(phy_attach);
483 * phy_detach - detach a PHY device from its network device
484 * @phydev: target phy_device struct
486 void phy_detach(struct phy_device *phydev)
488 phydev->attached_dev = NULL;
490 /* If the device had no specific driver before (i.e. - it
491 * was using the generic driver), we unbind the device
492 * from the generic driver so that there's a chance a
493 * real driver could be loaded */
494 if (phydev->dev.driver == &genphy_driver.driver)
495 device_release_driver(&phydev->dev);
497 EXPORT_SYMBOL(phy_detach);
500 /* Generic PHY support and helper functions */
503 * genphy_config_advert - sanitize and advertise auto-negotation parameters
504 * @phydev: target phy_device struct
506 * Description: Writes MII_ADVERTISE with the appropriate values,
507 * after sanitizing the values to make sure we only advertise
508 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
509 * hasn't changed, and > 0 if it has changed.
511 int genphy_config_advert(struct phy_device *phydev)
515 int err, changed = 0;
517 /* Only allow advertising what
518 * this PHY supports */
519 phydev->advertising &= phydev->supported;
520 advertise = phydev->advertising;
522 /* Setup standard advertisement */
523 oldadv = adv = phy_read(phydev, MII_ADVERTISE);
528 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
529 ADVERTISE_PAUSE_ASYM);
530 if (advertise & ADVERTISED_10baseT_Half)
531 adv |= ADVERTISE_10HALF;
532 if (advertise & ADVERTISED_10baseT_Full)
533 adv |= ADVERTISE_10FULL;
534 if (advertise & ADVERTISED_100baseT_Half)
535 adv |= ADVERTISE_100HALF;
536 if (advertise & ADVERTISED_100baseT_Full)
537 adv |= ADVERTISE_100FULL;
538 if (advertise & ADVERTISED_Pause)
539 adv |= ADVERTISE_PAUSE_CAP;
540 if (advertise & ADVERTISED_Asym_Pause)
541 adv |= ADVERTISE_PAUSE_ASYM;
544 err = phy_write(phydev, MII_ADVERTISE, adv);
551 /* Configure gigabit if it's supported */
552 if (phydev->supported & (SUPPORTED_1000baseT_Half |
553 SUPPORTED_1000baseT_Full)) {
554 oldadv = adv = phy_read(phydev, MII_CTRL1000);
559 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
560 if (advertise & SUPPORTED_1000baseT_Half)
561 adv |= ADVERTISE_1000HALF;
562 if (advertise & SUPPORTED_1000baseT_Full)
563 adv |= ADVERTISE_1000FULL;
566 err = phy_write(phydev, MII_CTRL1000, adv);
576 EXPORT_SYMBOL(genphy_config_advert);
579 * genphy_setup_forced - configures/forces speed/duplex from @phydev
580 * @phydev: target phy_device struct
582 * Description: Configures MII_BMCR to force speed/duplex
583 * to the values in phydev. Assumes that the values are valid.
584 * Please see phy_sanitize_settings().
586 int genphy_setup_forced(struct phy_device *phydev)
591 phydev->pause = phydev->asym_pause = 0;
593 if (SPEED_1000 == phydev->speed)
594 ctl |= BMCR_SPEED1000;
595 else if (SPEED_100 == phydev->speed)
596 ctl |= BMCR_SPEED100;
598 if (DUPLEX_FULL == phydev->duplex)
599 ctl |= BMCR_FULLDPLX;
601 err = phy_write(phydev, MII_BMCR, ctl);
608 * genphy_restart_aneg - Enable and Restart Autonegotiation
609 * @phydev: target phy_device struct
611 int genphy_restart_aneg(struct phy_device *phydev)
615 ctl = phy_read(phydev, MII_BMCR);
620 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
622 /* Don't isolate the PHY if we're negotiating */
623 ctl &= ~(BMCR_ISOLATE);
625 ctl = phy_write(phydev, MII_BMCR, ctl);
629 EXPORT_SYMBOL(genphy_restart_aneg);
633 * genphy_config_aneg - restart auto-negotiation or write BMCR
634 * @phydev: target phy_device struct
636 * Description: If auto-negotiation is enabled, we configure the
637 * advertising, and then restart auto-negotiation. If it is not
638 * enabled, then we write the BMCR.
640 int genphy_config_aneg(struct phy_device *phydev)
644 if (AUTONEG_ENABLE != phydev->autoneg)
645 return genphy_setup_forced(phydev);
647 result = genphy_config_advert(phydev);
649 if (result < 0) /* error */
653 /* Advertisment hasn't changed, but maybe aneg was never on to
654 * begin with? Or maybe phy was isolated? */
655 int ctl = phy_read(phydev, MII_BMCR);
660 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
661 result = 1; /* do restart aneg */
664 /* Only restart aneg if we are advertising something different
665 * than we were before. */
667 result = genphy_restart_aneg(phydev);
671 EXPORT_SYMBOL(genphy_config_aneg);
674 * genphy_update_link - update link status in @phydev
675 * @phydev: target phy_device struct
677 * Description: Update the value in phydev->link to reflect the
678 * current link value. In order to do this, we need to read
679 * the status register twice, keeping the second value.
681 int genphy_update_link(struct phy_device *phydev)
686 status = phy_read(phydev, MII_BMSR);
691 /* Read link and autonegotiation status */
692 status = phy_read(phydev, MII_BMSR);
697 if ((status & BMSR_LSTATUS) == 0)
704 EXPORT_SYMBOL(genphy_update_link);
707 * genphy_read_status - check the link status and update current link state
708 * @phydev: target phy_device struct
710 * Description: Check the link, then figure out the current state
711 * by comparing what we advertise with what the link partner
712 * advertises. Start by checking the gigabit possibilities,
713 * then move on to 10/100.
715 int genphy_read_status(struct phy_device *phydev)
722 /* Update the link, but return if there
724 err = genphy_update_link(phydev);
728 if (AUTONEG_ENABLE == phydev->autoneg) {
729 if (phydev->supported & (SUPPORTED_1000baseT_Half
730 | SUPPORTED_1000baseT_Full)) {
731 lpagb = phy_read(phydev, MII_STAT1000);
736 adv = phy_read(phydev, MII_CTRL1000);
744 lpa = phy_read(phydev, MII_LPA);
749 adv = phy_read(phydev, MII_ADVERTISE);
756 phydev->speed = SPEED_10;
757 phydev->duplex = DUPLEX_HALF;
758 phydev->pause = phydev->asym_pause = 0;
760 if (lpagb & (LPA_1000FULL | LPA_1000HALF)) {
761 phydev->speed = SPEED_1000;
763 if (lpagb & LPA_1000FULL)
764 phydev->duplex = DUPLEX_FULL;
765 } else if (lpa & (LPA_100FULL | LPA_100HALF)) {
766 phydev->speed = SPEED_100;
768 if (lpa & LPA_100FULL)
769 phydev->duplex = DUPLEX_FULL;
771 if (lpa & LPA_10FULL)
772 phydev->duplex = DUPLEX_FULL;
774 if (phydev->duplex == DUPLEX_FULL){
775 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
776 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
779 int bmcr = phy_read(phydev, MII_BMCR);
783 if (bmcr & BMCR_FULLDPLX)
784 phydev->duplex = DUPLEX_FULL;
786 phydev->duplex = DUPLEX_HALF;
788 if (bmcr & BMCR_SPEED1000)
789 phydev->speed = SPEED_1000;
790 else if (bmcr & BMCR_SPEED100)
791 phydev->speed = SPEED_100;
793 phydev->speed = SPEED_10;
795 phydev->pause = phydev->asym_pause = 0;
800 EXPORT_SYMBOL(genphy_read_status);
802 static int genphy_config_init(struct phy_device *phydev)
807 /* For now, I'll claim that the generic driver supports
808 * all possible port types */
809 features = (SUPPORTED_TP | SUPPORTED_MII
810 | SUPPORTED_AUI | SUPPORTED_FIBRE |
813 /* Do we support autonegotiation? */
814 val = phy_read(phydev, MII_BMSR);
819 if (val & BMSR_ANEGCAPABLE)
820 features |= SUPPORTED_Autoneg;
822 if (val & BMSR_100FULL)
823 features |= SUPPORTED_100baseT_Full;
824 if (val & BMSR_100HALF)
825 features |= SUPPORTED_100baseT_Half;
826 if (val & BMSR_10FULL)
827 features |= SUPPORTED_10baseT_Full;
828 if (val & BMSR_10HALF)
829 features |= SUPPORTED_10baseT_Half;
831 if (val & BMSR_ESTATEN) {
832 val = phy_read(phydev, MII_ESTATUS);
837 if (val & ESTATUS_1000_TFULL)
838 features |= SUPPORTED_1000baseT_Full;
839 if (val & ESTATUS_1000_THALF)
840 features |= SUPPORTED_1000baseT_Half;
843 phydev->supported = features;
844 phydev->advertising = features;
848 int genphy_suspend(struct phy_device *phydev)
852 mutex_lock(&phydev->lock);
854 value = phy_read(phydev, MII_BMCR);
855 phy_write(phydev, MII_BMCR, (value | BMCR_PDOWN));
857 mutex_unlock(&phydev->lock);
861 EXPORT_SYMBOL(genphy_suspend);
863 int genphy_resume(struct phy_device *phydev)
867 mutex_lock(&phydev->lock);
869 value = phy_read(phydev, MII_BMCR);
870 phy_write(phydev, MII_BMCR, (value & ~BMCR_PDOWN));
872 mutex_unlock(&phydev->lock);
876 EXPORT_SYMBOL(genphy_resume);
879 * phy_probe - probe and init a PHY device
880 * @dev: device to probe and init
882 * Description: Take care of setting up the phy_device structure,
883 * set the state to READY (the driver's init function should
884 * set it to STARTING if needed).
886 static int phy_probe(struct device *dev)
888 struct phy_device *phydev;
889 struct phy_driver *phydrv;
890 struct device_driver *drv;
893 phydev = to_phy_device(dev);
895 /* Make sure the driver is held.
896 * XXX -- Is this correct? */
897 drv = get_driver(phydev->dev.driver);
898 phydrv = to_phy_driver(drv);
899 phydev->drv = phydrv;
901 /* Disable the interrupt if the PHY doesn't support it */
902 if (!(phydrv->flags & PHY_HAS_INTERRUPT))
903 phydev->irq = PHY_POLL;
905 mutex_lock(&phydev->lock);
907 /* Start out supporting everything. Eventually,
908 * a controller will attach, and may modify one
909 * or both of these values */
910 phydev->supported = phydrv->features;
911 phydev->advertising = phydrv->features;
913 /* Set the state to READY by default */
914 phydev->state = PHY_READY;
916 if (phydev->drv->probe)
917 err = phydev->drv->probe(phydev);
919 mutex_unlock(&phydev->lock);
925 static int phy_remove(struct device *dev)
927 struct phy_device *phydev;
929 phydev = to_phy_device(dev);
931 mutex_lock(&phydev->lock);
932 phydev->state = PHY_DOWN;
933 mutex_unlock(&phydev->lock);
935 if (phydev->drv->remove)
936 phydev->drv->remove(phydev);
938 put_driver(dev->driver);
945 * phy_driver_register - register a phy_driver with the PHY layer
946 * @new_driver: new phy_driver to register
948 int phy_driver_register(struct phy_driver *new_driver)
952 new_driver->driver.name = new_driver->name;
953 new_driver->driver.bus = &mdio_bus_type;
954 new_driver->driver.probe = phy_probe;
955 new_driver->driver.remove = phy_remove;
957 retval = driver_register(&new_driver->driver);
960 printk(KERN_ERR "%s: Error %d in registering driver\n",
961 new_driver->name, retval);
966 pr_debug("%s: Registered new driver\n", new_driver->name);
970 EXPORT_SYMBOL(phy_driver_register);
972 void phy_driver_unregister(struct phy_driver *drv)
974 driver_unregister(&drv->driver);
976 EXPORT_SYMBOL(phy_driver_unregister);
978 static struct phy_driver genphy_driver = {
979 .phy_id = 0xffffffff,
980 .phy_id_mask = 0xffffffff,
981 .name = "Generic PHY",
982 .config_init = genphy_config_init,
984 .config_aneg = genphy_config_aneg,
985 .read_status = genphy_read_status,
986 .suspend = genphy_suspend,
987 .resume = genphy_resume,
988 .driver = {.owner= THIS_MODULE, },
991 static int __init phy_init(void)
995 rc = mdio_bus_init();
999 rc = phy_driver_register(&genphy_driver);
1006 static void __exit phy_exit(void)
1008 phy_driver_unregister(&genphy_driver);
1012 subsys_initcall(phy_init);
1013 module_exit(phy_exit);