1 /* Framework for finding and configuring PHYs.
2 * Also contains generic PHY driver
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17 #include <linux/kernel.h>
18 #include <linux/string.h>
19 #include <linux/errno.h>
20 #include <linux/unistd.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/skbuff.h>
29 #include <linux/module.h>
30 #include <linux/mii.h>
31 #include <linux/ethtool.h>
32 #include <linux/phy.h>
33 #include <linux/phy_led_triggers.h>
34 #include <linux/mdio.h>
36 #include <linux/uaccess.h>
41 MODULE_DESCRIPTION("PHY library");
42 MODULE_AUTHOR("Andy Fleming");
43 MODULE_LICENSE("GPL");
45 void phy_device_free(struct phy_device
*phydev
)
47 put_device(&phydev
->mdio
.dev
);
49 EXPORT_SYMBOL(phy_device_free
);
51 static void phy_mdio_device_free(struct mdio_device
*mdiodev
)
53 struct phy_device
*phydev
;
55 phydev
= container_of(mdiodev
, struct phy_device
, mdio
);
56 phy_device_free(phydev
);
59 static void phy_device_release(struct device
*dev
)
61 kfree(to_phy_device(dev
));
64 static void phy_mdio_device_remove(struct mdio_device
*mdiodev
)
66 struct phy_device
*phydev
;
68 phydev
= container_of(mdiodev
, struct phy_device
, mdio
);
69 phy_device_remove(phydev
);
72 static struct phy_driver genphy_driver
;
73 extern struct phy_driver genphy_10g_driver
;
75 static LIST_HEAD(phy_fixup_list
);
76 static DEFINE_MUTEX(phy_fixup_lock
);
79 static bool mdio_bus_phy_may_suspend(struct phy_device
*phydev
)
81 struct device_driver
*drv
= phydev
->mdio
.dev
.driver
;
82 struct phy_driver
*phydrv
= to_phy_driver(drv
);
83 struct net_device
*netdev
= phydev
->attached_dev
;
85 if (!drv
|| !phydrv
->suspend
)
88 /* PHY not attached? May suspend if the PHY has not already been
89 * suspended as part of a prior call to phy_disconnect() ->
90 * phy_detach() -> phy_suspend() because the parent netdev might be the
91 * MDIO bus driver and clock gated at this point.
94 return !phydev
->suspended
;
96 /* Don't suspend PHY if the attached netdev parent may wakeup.
97 * The parent may point to a PCI device, as in tg3 driver.
99 if (netdev
->dev
.parent
&& device_may_wakeup(netdev
->dev
.parent
))
102 /* Also don't suspend PHY if the netdev itself may wakeup. This
103 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
106 if (device_may_wakeup(&netdev
->dev
))
112 static int mdio_bus_phy_suspend(struct device
*dev
)
114 struct phy_device
*phydev
= to_phy_device(dev
);
116 /* We must stop the state machine manually, otherwise it stops out of
117 * control, possibly with the phydev->lock held. Upon resume, netdev
118 * may call phy routines that try to grab the same lock, and that may
119 * lead to a deadlock.
121 if (phydev
->attached_dev
&& phydev
->adjust_link
)
122 phy_stop_machine(phydev
);
124 if (!mdio_bus_phy_may_suspend(phydev
))
127 return phy_suspend(phydev
);
130 static int mdio_bus_phy_resume(struct device
*dev
)
132 struct phy_device
*phydev
= to_phy_device(dev
);
135 if (!mdio_bus_phy_may_suspend(phydev
))
138 mutex_lock(&phydev
->lock
);
139 ret
= phy_resume(phydev
);
140 mutex_unlock(&phydev
->lock
);
145 if (phydev
->attached_dev
&& phydev
->adjust_link
)
146 phy_start_machine(phydev
);
151 static int mdio_bus_phy_restore(struct device
*dev
)
153 struct phy_device
*phydev
= to_phy_device(dev
);
154 struct net_device
*netdev
= phydev
->attached_dev
;
160 ret
= phy_init_hw(phydev
);
164 /* The PHY needs to renegotiate. */
166 phydev
->state
= PHY_UP
;
168 phy_start_machine(phydev
);
173 static const struct dev_pm_ops mdio_bus_phy_pm_ops
= {
174 .suspend
= mdio_bus_phy_suspend
,
175 .resume
= mdio_bus_phy_resume
,
176 .freeze
= mdio_bus_phy_suspend
,
177 .thaw
= mdio_bus_phy_resume
,
178 .restore
= mdio_bus_phy_restore
,
181 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
185 #define MDIO_BUS_PHY_PM_OPS NULL
187 #endif /* CONFIG_PM */
190 * phy_register_fixup - creates a new phy_fixup and adds it to the list
191 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
192 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
193 * It can also be PHY_ANY_UID
194 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
196 * @run: The actual code to be run when a matching PHY is found
198 int phy_register_fixup(const char *bus_id
, u32 phy_uid
, u32 phy_uid_mask
,
199 int (*run
)(struct phy_device
*))
201 struct phy_fixup
*fixup
= kzalloc(sizeof(*fixup
), GFP_KERNEL
);
206 strlcpy(fixup
->bus_id
, bus_id
, sizeof(fixup
->bus_id
));
207 fixup
->phy_uid
= phy_uid
;
208 fixup
->phy_uid_mask
= phy_uid_mask
;
211 mutex_lock(&phy_fixup_lock
);
212 list_add_tail(&fixup
->list
, &phy_fixup_list
);
213 mutex_unlock(&phy_fixup_lock
);
217 EXPORT_SYMBOL(phy_register_fixup
);
219 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
220 int phy_register_fixup_for_uid(u32 phy_uid
, u32 phy_uid_mask
,
221 int (*run
)(struct phy_device
*))
223 return phy_register_fixup(PHY_ANY_ID
, phy_uid
, phy_uid_mask
, run
);
225 EXPORT_SYMBOL(phy_register_fixup_for_uid
);
227 /* Registers a fixup to be run on the PHY with id string bus_id */
228 int phy_register_fixup_for_id(const char *bus_id
,
229 int (*run
)(struct phy_device
*))
231 return phy_register_fixup(bus_id
, PHY_ANY_UID
, 0xffffffff, run
);
233 EXPORT_SYMBOL(phy_register_fixup_for_id
);
236 * phy_unregister_fixup - remove a phy_fixup from the list
237 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
238 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
239 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
241 int phy_unregister_fixup(const char *bus_id
, u32 phy_uid
, u32 phy_uid_mask
)
243 struct list_head
*pos
, *n
;
244 struct phy_fixup
*fixup
;
249 mutex_lock(&phy_fixup_lock
);
250 list_for_each_safe(pos
, n
, &phy_fixup_list
) {
251 fixup
= list_entry(pos
, struct phy_fixup
, list
);
253 if ((!strcmp(fixup
->bus_id
, bus_id
)) &&
254 ((fixup
->phy_uid
& phy_uid_mask
) ==
255 (phy_uid
& phy_uid_mask
))) {
256 list_del(&fixup
->list
);
262 mutex_unlock(&phy_fixup_lock
);
266 EXPORT_SYMBOL(phy_unregister_fixup
);
268 /* Unregisters a fixup of any PHY with the UID in phy_uid */
269 int phy_unregister_fixup_for_uid(u32 phy_uid
, u32 phy_uid_mask
)
271 return phy_unregister_fixup(PHY_ANY_ID
, phy_uid
, phy_uid_mask
);
273 EXPORT_SYMBOL(phy_unregister_fixup_for_uid
);
275 /* Unregisters a fixup of the PHY with id string bus_id */
276 int phy_unregister_fixup_for_id(const char *bus_id
)
278 return phy_unregister_fixup(bus_id
, PHY_ANY_UID
, 0xffffffff);
280 EXPORT_SYMBOL(phy_unregister_fixup_for_id
);
282 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
283 * Fixups can be set to match any in one or more fields.
285 static int phy_needs_fixup(struct phy_device
*phydev
, struct phy_fixup
*fixup
)
287 if (strcmp(fixup
->bus_id
, phydev_name(phydev
)) != 0)
288 if (strcmp(fixup
->bus_id
, PHY_ANY_ID
) != 0)
291 if ((fixup
->phy_uid
& fixup
->phy_uid_mask
) !=
292 (phydev
->phy_id
& fixup
->phy_uid_mask
))
293 if (fixup
->phy_uid
!= PHY_ANY_UID
)
299 /* Runs any matching fixups for this phydev */
300 static int phy_scan_fixups(struct phy_device
*phydev
)
302 struct phy_fixup
*fixup
;
304 mutex_lock(&phy_fixup_lock
);
305 list_for_each_entry(fixup
, &phy_fixup_list
, list
) {
306 if (phy_needs_fixup(phydev
, fixup
)) {
307 int err
= fixup
->run(phydev
);
310 mutex_unlock(&phy_fixup_lock
);
313 phydev
->has_fixups
= true;
316 mutex_unlock(&phy_fixup_lock
);
321 static int phy_bus_match(struct device
*dev
, struct device_driver
*drv
)
323 struct phy_device
*phydev
= to_phy_device(dev
);
324 struct phy_driver
*phydrv
= to_phy_driver(drv
);
325 const int num_ids
= ARRAY_SIZE(phydev
->c45_ids
.device_ids
);
328 if (!(phydrv
->mdiodrv
.flags
& MDIO_DEVICE_IS_PHY
))
331 if (phydrv
->match_phy_device
)
332 return phydrv
->match_phy_device(phydev
);
334 if (phydev
->is_c45
) {
335 for (i
= 1; i
< num_ids
; i
++) {
336 if (!(phydev
->c45_ids
.devices_in_package
& (1 << i
)))
339 if ((phydrv
->phy_id
& phydrv
->phy_id_mask
) ==
340 (phydev
->c45_ids
.device_ids
[i
] &
341 phydrv
->phy_id_mask
))
346 return (phydrv
->phy_id
& phydrv
->phy_id_mask
) ==
347 (phydev
->phy_id
& phydrv
->phy_id_mask
);
351 struct phy_device
*phy_device_create(struct mii_bus
*bus
, int addr
, int phy_id
,
353 struct phy_c45_device_ids
*c45_ids
)
355 struct phy_device
*dev
;
356 struct mdio_device
*mdiodev
;
358 /* We allocate the device, and initialize the default values */
359 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
361 return ERR_PTR(-ENOMEM
);
363 mdiodev
= &dev
->mdio
;
364 mdiodev
->dev
.release
= phy_device_release
;
365 mdiodev
->dev
.parent
= &bus
->dev
;
366 mdiodev
->dev
.bus
= &mdio_bus_type
;
368 mdiodev
->pm_ops
= MDIO_BUS_PHY_PM_OPS
;
369 mdiodev
->bus_match
= phy_bus_match
;
370 mdiodev
->addr
= addr
;
371 mdiodev
->flags
= MDIO_DEVICE_FLAG_PHY
;
372 mdiodev
->device_free
= phy_mdio_device_free
;
373 mdiodev
->device_remove
= phy_mdio_device_remove
;
380 dev
->interface
= PHY_INTERFACE_MODE_GMII
;
382 dev
->autoneg
= AUTONEG_ENABLE
;
384 dev
->is_c45
= is_c45
;
385 dev
->phy_id
= phy_id
;
387 dev
->c45_ids
= *c45_ids
;
388 dev
->irq
= bus
->irq
[addr
];
389 dev_set_name(&mdiodev
->dev
, PHY_ID_FMT
, bus
->id
, addr
);
391 dev
->state
= PHY_DOWN
;
393 mutex_init(&dev
->lock
);
394 INIT_DELAYED_WORK(&dev
->state_queue
, phy_state_machine
);
395 INIT_WORK(&dev
->phy_queue
, phy_change_work
);
397 /* Request the appropriate module unconditionally; don't
398 * bother trying to do so only if it isn't already loaded,
399 * because that gets complicated. A hotplug event would have
400 * done an unconditional modprobe anyway.
401 * We don't do normal hotplug because it won't work for MDIO
402 * -- because it relies on the device staying around for long
403 * enough for the driver to get loaded. With MDIO, the NIC
404 * driver will get bored and give up as soon as it finds that
405 * there's no driver _already_ loaded.
407 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT
, MDIO_ID_ARGS(phy_id
));
409 device_initialize(&mdiodev
->dev
);
413 EXPORT_SYMBOL(phy_device_create
);
415 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
416 * @bus: the target MII bus
417 * @addr: PHY address on the MII bus
418 * @dev_addr: MMD address in the PHY.
419 * @devices_in_package: where to store the devices in package information.
421 * Description: reads devices in package registers of a MMD at @dev_addr
422 * from PHY at @addr on @bus.
424 * Returns: 0 on success, -EIO on failure.
426 static int get_phy_c45_devs_in_pkg(struct mii_bus
*bus
, int addr
, int dev_addr
,
427 u32
*devices_in_package
)
429 int phy_reg
, reg_addr
;
431 reg_addr
= MII_ADDR_C45
| dev_addr
<< 16 | MDIO_DEVS2
;
432 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
435 *devices_in_package
= (phy_reg
& 0xffff) << 16;
437 reg_addr
= MII_ADDR_C45
| dev_addr
<< 16 | MDIO_DEVS1
;
438 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
441 *devices_in_package
|= (phy_reg
& 0xffff);
447 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
448 * @bus: the target MII bus
449 * @addr: PHY address on the MII bus
450 * @phy_id: where to store the ID retrieved.
451 * @c45_ids: where to store the c45 ID information.
453 * If the PHY devices-in-package appears to be valid, it and the
454 * corresponding identifiers are stored in @c45_ids, zero is stored
455 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
459 static int get_phy_c45_ids(struct mii_bus
*bus
, int addr
, u32
*phy_id
,
460 struct phy_c45_device_ids
*c45_ids
) {
463 const int num_ids
= ARRAY_SIZE(c45_ids
->device_ids
);
464 u32
*devs
= &c45_ids
->devices_in_package
;
466 /* Find first non-zero Devices In package. Device zero is reserved
467 * for 802.3 c45 complied PHYs, so don't probe it at first.
469 for (i
= 1; i
< num_ids
&& *devs
== 0; i
++) {
470 phy_reg
= get_phy_c45_devs_in_pkg(bus
, addr
, i
, devs
);
474 if ((*devs
& 0x1fffffff) == 0x1fffffff) {
475 /* If mostly Fs, there is no device there,
476 * then let's continue to probe more, as some
477 * 10G PHYs have zero Devices In package,
478 * e.g. Cortina CS4315/CS4340 PHY.
480 phy_reg
= get_phy_c45_devs_in_pkg(bus
, addr
, 0, devs
);
483 /* no device there, let's get out of here */
484 if ((*devs
& 0x1fffffff) == 0x1fffffff) {
485 *phy_id
= 0xffffffff;
493 /* Now probe Device Identifiers for each device present. */
494 for (i
= 1; i
< num_ids
; i
++) {
495 if (!(c45_ids
->devices_in_package
& (1 << i
)))
498 reg_addr
= MII_ADDR_C45
| i
<< 16 | MII_PHYSID1
;
499 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
502 c45_ids
->device_ids
[i
] = (phy_reg
& 0xffff) << 16;
504 reg_addr
= MII_ADDR_C45
| i
<< 16 | MII_PHYSID2
;
505 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
508 c45_ids
->device_ids
[i
] |= (phy_reg
& 0xffff);
515 * get_phy_id - reads the specified addr for its ID.
516 * @bus: the target MII bus
517 * @addr: PHY address on the MII bus
518 * @phy_id: where to store the ID retrieved.
519 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
520 * @c45_ids: where to store the c45 ID information.
522 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
523 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
526 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
527 * its return value is in turn returned.
530 static int get_phy_id(struct mii_bus
*bus
, int addr
, u32
*phy_id
,
531 bool is_c45
, struct phy_c45_device_ids
*c45_ids
)
536 return get_phy_c45_ids(bus
, addr
, phy_id
, c45_ids
);
538 /* Grab the bits from PHYIR1, and put them in the upper half */
539 phy_reg
= mdiobus_read(bus
, addr
, MII_PHYSID1
);
543 *phy_id
= (phy_reg
& 0xffff) << 16;
545 /* Grab the bits from PHYIR2, and put them in the lower half */
546 phy_reg
= mdiobus_read(bus
, addr
, MII_PHYSID2
);
550 *phy_id
|= (phy_reg
& 0xffff);
556 * get_phy_device - reads the specified PHY device and returns its @phy_device
558 * @bus: the target MII bus
559 * @addr: PHY address on the MII bus
560 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
562 * Description: Reads the ID registers of the PHY at @addr on the
563 * @bus, then allocates and returns the phy_device to represent it.
565 struct phy_device
*get_phy_device(struct mii_bus
*bus
, int addr
, bool is_c45
)
567 struct phy_c45_device_ids c45_ids
= {0};
571 r
= get_phy_id(bus
, addr
, &phy_id
, is_c45
, &c45_ids
);
575 /* If the phy_id is mostly Fs, there is no device there */
576 if ((phy_id
& 0x1fffffff) == 0x1fffffff)
577 return ERR_PTR(-ENODEV
);
579 return phy_device_create(bus
, addr
, phy_id
, is_c45
, &c45_ids
);
581 EXPORT_SYMBOL(get_phy_device
);
584 phy_id_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
586 struct phy_device
*phydev
= to_phy_device(dev
);
588 return sprintf(buf
, "0x%.8lx\n", (unsigned long)phydev
->phy_id
);
590 static DEVICE_ATTR_RO(phy_id
);
593 phy_interface_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
595 struct phy_device
*phydev
= to_phy_device(dev
);
596 const char *mode
= NULL
;
598 if (phy_is_internal(phydev
))
601 mode
= phy_modes(phydev
->interface
);
603 return sprintf(buf
, "%s\n", mode
);
605 static DEVICE_ATTR_RO(phy_interface
);
608 phy_has_fixups_show(struct device
*dev
, struct device_attribute
*attr
,
611 struct phy_device
*phydev
= to_phy_device(dev
);
613 return sprintf(buf
, "%d\n", phydev
->has_fixups
);
615 static DEVICE_ATTR_RO(phy_has_fixups
);
617 static struct attribute
*phy_dev_attrs
[] = {
618 &dev_attr_phy_id
.attr
,
619 &dev_attr_phy_interface
.attr
,
620 &dev_attr_phy_has_fixups
.attr
,
623 ATTRIBUTE_GROUPS(phy_dev
);
626 * phy_device_register - Register the phy device on the MDIO bus
627 * @phydev: phy_device structure to be added to the MDIO bus
629 int phy_device_register(struct phy_device
*phydev
)
633 err
= mdiobus_register_device(&phydev
->mdio
);
637 /* Run all of the fixups for this PHY */
638 err
= phy_scan_fixups(phydev
);
640 pr_err("PHY %d failed to initialize\n", phydev
->mdio
.addr
);
644 phydev
->mdio
.dev
.groups
= phy_dev_groups
;
646 err
= device_add(&phydev
->mdio
.dev
);
648 pr_err("PHY %d failed to add\n", phydev
->mdio
.addr
);
655 mdiobus_unregister_device(&phydev
->mdio
);
658 EXPORT_SYMBOL(phy_device_register
);
661 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
662 * @phydev: phy_device structure to remove
664 * This doesn't free the phy_device itself, it merely reverses the effects
665 * of phy_device_register(). Use phy_device_free() to free the device
666 * after calling this function.
668 void phy_device_remove(struct phy_device
*phydev
)
670 device_del(&phydev
->mdio
.dev
);
671 mdiobus_unregister_device(&phydev
->mdio
);
673 EXPORT_SYMBOL(phy_device_remove
);
676 * phy_find_first - finds the first PHY device on the bus
677 * @bus: the target MII bus
679 struct phy_device
*phy_find_first(struct mii_bus
*bus
)
681 struct phy_device
*phydev
;
684 for (addr
= 0; addr
< PHY_MAX_ADDR
; addr
++) {
685 phydev
= mdiobus_get_phy(bus
, addr
);
691 EXPORT_SYMBOL(phy_find_first
);
693 static void phy_link_change(struct phy_device
*phydev
, bool up
, bool do_carrier
)
695 struct net_device
*netdev
= phydev
->attached_dev
;
699 netif_carrier_on(netdev
);
701 netif_carrier_off(netdev
);
703 phydev
->adjust_link(netdev
);
707 * phy_prepare_link - prepares the PHY layer to monitor link status
708 * @phydev: target phy_device struct
709 * @handler: callback function for link status change notifications
711 * Description: Tells the PHY infrastructure to handle the
712 * gory details on monitoring link status (whether through
713 * polling or an interrupt), and to call back to the
714 * connected device driver when the link status changes.
715 * If you want to monitor your own link state, don't call
718 static void phy_prepare_link(struct phy_device
*phydev
,
719 void (*handler
)(struct net_device
*))
721 phydev
->adjust_link
= handler
;
725 * phy_connect_direct - connect an ethernet device to a specific phy_device
726 * @dev: the network device to connect
727 * @phydev: the pointer to the phy device
728 * @handler: callback function for state change notifications
729 * @interface: PHY device's interface
731 int phy_connect_direct(struct net_device
*dev
, struct phy_device
*phydev
,
732 void (*handler
)(struct net_device
*),
733 phy_interface_t interface
)
737 rc
= phy_attach_direct(dev
, phydev
, phydev
->dev_flags
, interface
);
741 phy_prepare_link(phydev
, handler
);
742 phy_start_machine(phydev
);
744 phy_start_interrupts(phydev
);
748 EXPORT_SYMBOL(phy_connect_direct
);
751 * phy_connect - connect an ethernet device to a PHY device
752 * @dev: the network device to connect
753 * @bus_id: the id string of the PHY device to connect
754 * @handler: callback function for state change notifications
755 * @interface: PHY device's interface
757 * Description: Convenience function for connecting ethernet
758 * devices to PHY devices. The default behavior is for
759 * the PHY infrastructure to handle everything, and only notify
760 * the connected driver when the link status changes. If you
761 * don't want, or can't use the provided functionality, you may
762 * choose to call only the subset of functions which provide
763 * the desired functionality.
765 struct phy_device
*phy_connect(struct net_device
*dev
, const char *bus_id
,
766 void (*handler
)(struct net_device
*),
767 phy_interface_t interface
)
769 struct phy_device
*phydev
;
773 /* Search the list of PHY devices on the mdio bus for the
774 * PHY with the requested name
776 d
= bus_find_device_by_name(&mdio_bus_type
, NULL
, bus_id
);
778 pr_err("PHY %s not found\n", bus_id
);
779 return ERR_PTR(-ENODEV
);
781 phydev
= to_phy_device(d
);
783 rc
= phy_connect_direct(dev
, phydev
, handler
, interface
);
790 EXPORT_SYMBOL(phy_connect
);
793 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
795 * @phydev: target phy_device struct
797 void phy_disconnect(struct phy_device
*phydev
)
800 phy_stop_interrupts(phydev
);
802 phy_stop_machine(phydev
);
804 phydev
->adjust_link
= NULL
;
808 EXPORT_SYMBOL(phy_disconnect
);
811 * phy_poll_reset - Safely wait until a PHY reset has properly completed
812 * @phydev: The PHY device to poll
814 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
815 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
816 * register must be polled until the BMCR_RESET bit clears.
818 * Furthermore, any attempts to write to PHY registers may have no effect
819 * or even generate MDIO bus errors until this is complete.
821 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
822 * standard and do not fully reset after the BMCR_RESET bit is set, and may
823 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
824 * effort to support such broken PHYs, this function is separate from the
825 * standard phy_init_hw() which will zero all the other bits in the BMCR
826 * and reapply all driver-specific and board-specific fixups.
828 static int phy_poll_reset(struct phy_device
*phydev
)
830 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
831 unsigned int retries
= 12;
836 ret
= phy_read(phydev
, MII_BMCR
);
839 } while (ret
& BMCR_RESET
&& --retries
);
840 if (ret
& BMCR_RESET
)
843 /* Some chips (smsc911x) may still need up to another 1ms after the
844 * BMCR_RESET bit is cleared before they are usable.
850 int phy_init_hw(struct phy_device
*phydev
)
854 if (!phydev
->drv
|| !phydev
->drv
->config_init
)
857 if (phydev
->drv
->soft_reset
)
858 ret
= phydev
->drv
->soft_reset(phydev
);
860 ret
= genphy_soft_reset(phydev
);
865 ret
= phy_scan_fixups(phydev
);
869 return phydev
->drv
->config_init(phydev
);
871 EXPORT_SYMBOL(phy_init_hw
);
873 void phy_attached_info(struct phy_device
*phydev
)
875 phy_attached_print(phydev
, NULL
);
877 EXPORT_SYMBOL(phy_attached_info
);
879 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
880 void phy_attached_print(struct phy_device
*phydev
, const char *fmt
, ...)
882 const char *drv_name
= phydev
->drv
? phydev
->drv
->name
: "unbound";
886 switch(phydev
->irq
) {
890 case PHY_IGNORE_INTERRUPT
:
894 snprintf(irq_num
, sizeof(irq_num
), "%d", phydev
->irq
);
901 dev_info(&phydev
->mdio
.dev
, ATTACHED_FMT
"\n",
902 drv_name
, phydev_name(phydev
),
907 dev_info(&phydev
->mdio
.dev
, ATTACHED_FMT
,
908 drv_name
, phydev_name(phydev
),
916 EXPORT_SYMBOL(phy_attached_print
);
919 * phy_attach_direct - attach a network device to a given PHY device pointer
920 * @dev: network device to attach
921 * @phydev: Pointer to phy_device to attach
922 * @flags: PHY device's dev_flags
923 * @interface: PHY device's interface
925 * Description: Called by drivers to attach to a particular PHY
926 * device. The phy_device is found, and properly hooked up
927 * to the phy_driver. If no driver is attached, then a
928 * generic driver is used. The phy_device is given a ptr to
929 * the attaching device, and given a callback for link status
930 * change. The phy_device is returned to the attaching driver.
931 * This function takes a reference on the phy device.
933 int phy_attach_direct(struct net_device
*dev
, struct phy_device
*phydev
,
934 u32 flags
, phy_interface_t interface
)
936 struct module
*ndev_owner
= dev
->dev
.parent
->driver
->owner
;
937 struct mii_bus
*bus
= phydev
->mdio
.bus
;
938 struct device
*d
= &phydev
->mdio
.dev
;
939 bool using_genphy
= false;
942 /* For Ethernet device drivers that register their own MDIO bus, we
943 * will have bus->owner match ndev_mod, so we do not want to increment
944 * our own module->refcnt here, otherwise we would not be able to
947 if (ndev_owner
!= bus
->owner
&& !try_module_get(bus
->owner
)) {
948 dev_err(&dev
->dev
, "failed to get the bus module\n");
954 /* Assume that if there is no driver, that it doesn't
955 * exist, and we should use the genphy driver.
959 d
->driver
= &genphy_10g_driver
.mdiodrv
.driver
;
961 d
->driver
= &genphy_driver
.mdiodrv
.driver
;
966 if (!try_module_get(d
->driver
->owner
)) {
967 dev_err(&dev
->dev
, "failed to get the device driver module\n");
969 goto error_put_device
;
973 err
= d
->driver
->probe(d
);
975 err
= device_bind_driver(d
);
978 goto error_module_put
;
981 if (phydev
->attached_dev
) {
982 dev_err(&dev
->dev
, "PHY already attached\n");
987 phydev
->phy_link_change
= phy_link_change
;
988 phydev
->attached_dev
= dev
;
989 dev
->phydev
= phydev
;
991 /* Some Ethernet drivers try to connect to a PHY device before
992 * calling register_netdevice() -> netdev_register_kobject() and
993 * does the dev->dev.kobj initialization. Here we only check for
994 * success which indicates that the network device kobject is
995 * ready. Once we do that we still need to keep track of whether
996 * links were successfully set up or not for phy_detach() to
997 * remove them accordingly.
999 phydev
->sysfs_links
= false;
1001 err
= sysfs_create_link(&phydev
->mdio
.dev
.kobj
, &dev
->dev
.kobj
,
1004 err
= sysfs_create_link(&dev
->dev
.kobj
, &phydev
->mdio
.dev
.kobj
,
1009 phydev
->sysfs_links
= true;
1012 phydev
->dev_flags
= flags
;
1014 phydev
->interface
= interface
;
1016 phydev
->state
= PHY_READY
;
1018 /* Initial carrier state is off as the phy is about to be
1021 netif_carrier_off(phydev
->attached_dev
);
1023 /* Do initial configuration here, now that
1024 * we have certain key parameters
1025 * (dev_flags and interface)
1027 err
= phy_init_hw(phydev
);
1031 mutex_lock(&phydev
->lock
);
1033 mutex_unlock(&phydev
->lock
);
1034 phy_led_triggers_register(phydev
);
1039 /* phy_detach() does all of the cleanup below */
1044 module_put(d
->driver
->owner
);
1047 if (ndev_owner
!= bus
->owner
)
1048 module_put(bus
->owner
);
1051 EXPORT_SYMBOL(phy_attach_direct
);
1054 * phy_attach - attach a network device to a particular PHY device
1055 * @dev: network device to attach
1056 * @bus_id: Bus ID of PHY device to attach
1057 * @interface: PHY device's interface
1059 * Description: Same as phy_attach_direct() except that a PHY bus_id
1060 * string is passed instead of a pointer to a struct phy_device.
1062 struct phy_device
*phy_attach(struct net_device
*dev
, const char *bus_id
,
1063 phy_interface_t interface
)
1065 struct bus_type
*bus
= &mdio_bus_type
;
1066 struct phy_device
*phydev
;
1070 /* Search the list of PHY devices on the mdio bus for the
1071 * PHY with the requested name
1073 d
= bus_find_device_by_name(bus
, NULL
, bus_id
);
1075 pr_err("PHY %s not found\n", bus_id
);
1076 return ERR_PTR(-ENODEV
);
1078 phydev
= to_phy_device(d
);
1080 rc
= phy_attach_direct(dev
, phydev
, phydev
->dev_flags
, interface
);
1087 EXPORT_SYMBOL(phy_attach
);
1090 * phy_detach - detach a PHY device from its network device
1091 * @phydev: target phy_device struct
1093 * This detaches the phy device from its network device and the phy
1094 * driver, and drops the reference count taken in phy_attach_direct().
1096 void phy_detach(struct phy_device
*phydev
)
1098 struct net_device
*dev
= phydev
->attached_dev
;
1099 struct module
*ndev_owner
= dev
->dev
.parent
->driver
->owner
;
1100 struct mii_bus
*bus
;
1102 if (phydev
->sysfs_links
) {
1103 sysfs_remove_link(&dev
->dev
.kobj
, "phydev");
1104 sysfs_remove_link(&phydev
->mdio
.dev
.kobj
, "attached_dev");
1106 phydev
->attached_dev
->phydev
= NULL
;
1107 phydev
->attached_dev
= NULL
;
1108 phy_suspend(phydev
);
1109 phydev
->phylink
= NULL
;
1111 phy_led_triggers_unregister(phydev
);
1113 module_put(phydev
->mdio
.dev
.driver
->owner
);
1115 /* If the device had no specific driver before (i.e. - it
1116 * was using the generic driver), we unbind the device
1117 * from the generic driver so that there's a chance a
1118 * real driver could be loaded
1120 if (phydev
->mdio
.dev
.driver
== &genphy_10g_driver
.mdiodrv
.driver
||
1121 phydev
->mdio
.dev
.driver
== &genphy_driver
.mdiodrv
.driver
)
1122 device_release_driver(&phydev
->mdio
.dev
);
1125 * The phydev might go away on the put_device() below, so avoid
1126 * a use-after-free bug by reading the underlying bus first.
1128 bus
= phydev
->mdio
.bus
;
1130 put_device(&phydev
->mdio
.dev
);
1131 if (ndev_owner
!= bus
->owner
)
1132 module_put(bus
->owner
);
1134 EXPORT_SYMBOL(phy_detach
);
1136 int phy_suspend(struct phy_device
*phydev
)
1138 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1139 struct ethtool_wolinfo wol
= { .cmd
= ETHTOOL_GWOL
};
1142 /* If the device has WOL enabled, we cannot suspend the PHY */
1143 phy_ethtool_get_wol(phydev
, &wol
);
1147 if (phydev
->drv
&& phydrv
->suspend
)
1148 ret
= phydrv
->suspend(phydev
);
1153 phydev
->suspended
= true;
1157 EXPORT_SYMBOL(phy_suspend
);
1159 int phy_resume(struct phy_device
*phydev
)
1161 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1164 WARN_ON(!mutex_is_locked(&phydev
->lock
));
1166 if (phydev
->drv
&& phydrv
->resume
)
1167 ret
= phydrv
->resume(phydev
);
1172 phydev
->suspended
= false;
1176 EXPORT_SYMBOL(phy_resume
);
1178 int phy_loopback(struct phy_device
*phydev
, bool enable
)
1180 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1183 mutex_lock(&phydev
->lock
);
1185 if (enable
&& phydev
->loopback_enabled
) {
1190 if (!enable
&& !phydev
->loopback_enabled
) {
1195 if (phydev
->drv
&& phydrv
->set_loopback
)
1196 ret
= phydrv
->set_loopback(phydev
, enable
);
1203 phydev
->loopback_enabled
= enable
;
1206 mutex_unlock(&phydev
->lock
);
1209 EXPORT_SYMBOL(phy_loopback
);
1211 /* Generic PHY support and helper functions */
1214 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1215 * @phydev: target phy_device struct
1217 * Description: Writes MII_ADVERTISE with the appropriate values,
1218 * after sanitizing the values to make sure we only advertise
1219 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1220 * hasn't changed, and > 0 if it has changed.
1222 static int genphy_config_advert(struct phy_device
*phydev
)
1225 int oldadv
, adv
, bmsr
;
1226 int err
, changed
= 0;
1228 /* Only allow advertising what this PHY supports */
1229 phydev
->advertising
&= phydev
->supported
;
1230 advertise
= phydev
->advertising
;
1232 /* Setup standard advertisement */
1233 adv
= phy_read(phydev
, MII_ADVERTISE
);
1238 adv
&= ~(ADVERTISE_ALL
| ADVERTISE_100BASE4
| ADVERTISE_PAUSE_CAP
|
1239 ADVERTISE_PAUSE_ASYM
);
1240 adv
|= ethtool_adv_to_mii_adv_t(advertise
);
1242 if (adv
!= oldadv
) {
1243 err
= phy_write(phydev
, MII_ADVERTISE
, adv
);
1250 bmsr
= phy_read(phydev
, MII_BMSR
);
1254 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1255 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1258 if (!(bmsr
& BMSR_ESTATEN
))
1261 /* Configure gigabit if it's supported */
1262 adv
= phy_read(phydev
, MII_CTRL1000
);
1267 adv
&= ~(ADVERTISE_1000FULL
| ADVERTISE_1000HALF
);
1269 if (phydev
->supported
& (SUPPORTED_1000baseT_Half
|
1270 SUPPORTED_1000baseT_Full
)) {
1271 adv
|= ethtool_adv_to_mii_ctrl1000_t(advertise
);
1277 err
= phy_write(phydev
, MII_CTRL1000
, adv
);
1285 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1286 * @phydev: target phy_device struct
1288 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1289 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1290 * changed, and 1 if it has changed.
1292 static int genphy_config_eee_advert(struct phy_device
*phydev
)
1294 int broken
= phydev
->eee_broken_modes
;
1297 /* Nothing to disable */
1301 /* If the following call fails, we assume that EEE is not
1302 * supported by the phy. If we read 0, EEE is not advertised
1303 * In both case, we don't need to continue
1305 adv
= phy_read_mmd(phydev
, MDIO_MMD_AN
, MDIO_AN_EEE_ADV
);
1312 /* Advertising remains unchanged with the broken mask */
1316 phy_write_mmd(phydev
, MDIO_MMD_AN
, MDIO_AN_EEE_ADV
, adv
);
1322 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1323 * @phydev: target phy_device struct
1325 * Description: Configures MII_BMCR to force speed/duplex
1326 * to the values in phydev. Assumes that the values are valid.
1327 * Please see phy_sanitize_settings().
1329 int genphy_setup_forced(struct phy_device
*phydev
)
1331 int ctl
= phy_read(phydev
, MII_BMCR
);
1333 ctl
&= BMCR_LOOPBACK
| BMCR_ISOLATE
| BMCR_PDOWN
;
1335 phydev
->asym_pause
= 0;
1337 if (SPEED_1000
== phydev
->speed
)
1338 ctl
|= BMCR_SPEED1000
;
1339 else if (SPEED_100
== phydev
->speed
)
1340 ctl
|= BMCR_SPEED100
;
1342 if (DUPLEX_FULL
== phydev
->duplex
)
1343 ctl
|= BMCR_FULLDPLX
;
1345 return phy_write(phydev
, MII_BMCR
, ctl
);
1347 EXPORT_SYMBOL(genphy_setup_forced
);
1350 * genphy_restart_aneg - Enable and Restart Autonegotiation
1351 * @phydev: target phy_device struct
1353 int genphy_restart_aneg(struct phy_device
*phydev
)
1355 int ctl
= phy_read(phydev
, MII_BMCR
);
1360 ctl
|= BMCR_ANENABLE
| BMCR_ANRESTART
;
1362 /* Don't isolate the PHY if we're negotiating */
1363 ctl
&= ~BMCR_ISOLATE
;
1365 return phy_write(phydev
, MII_BMCR
, ctl
);
1367 EXPORT_SYMBOL(genphy_restart_aneg
);
1370 * genphy_config_aneg - restart auto-negotiation or write BMCR
1371 * @phydev: target phy_device struct
1373 * Description: If auto-negotiation is enabled, we configure the
1374 * advertising, and then restart auto-negotiation. If it is not
1375 * enabled, then we write the BMCR.
1377 int genphy_config_aneg(struct phy_device
*phydev
)
1381 changed
= genphy_config_eee_advert(phydev
);
1383 if (AUTONEG_ENABLE
!= phydev
->autoneg
)
1384 return genphy_setup_forced(phydev
);
1386 err
= genphy_config_advert(phydev
);
1387 if (err
< 0) /* error */
1393 /* Advertisement hasn't changed, but maybe aneg was never on to
1394 * begin with? Or maybe phy was isolated?
1396 int ctl
= phy_read(phydev
, MII_BMCR
);
1401 if (!(ctl
& BMCR_ANENABLE
) || (ctl
& BMCR_ISOLATE
))
1402 changed
= 1; /* do restart aneg */
1405 /* Only restart aneg if we are advertising something different
1406 * than we were before.
1409 return genphy_restart_aneg(phydev
);
1413 EXPORT_SYMBOL(genphy_config_aneg
);
1416 * genphy_aneg_done - return auto-negotiation status
1417 * @phydev: target phy_device struct
1419 * Description: Reads the status register and returns 0 either if
1420 * auto-negotiation is incomplete, or if there was an error.
1421 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1423 int genphy_aneg_done(struct phy_device
*phydev
)
1425 int retval
= phy_read(phydev
, MII_BMSR
);
1427 return (retval
< 0) ? retval
: (retval
& BMSR_ANEGCOMPLETE
);
1429 EXPORT_SYMBOL(genphy_aneg_done
);
1432 * genphy_update_link - update link status in @phydev
1433 * @phydev: target phy_device struct
1435 * Description: Update the value in phydev->link to reflect the
1436 * current link value. In order to do this, we need to read
1437 * the status register twice, keeping the second value.
1439 int genphy_update_link(struct phy_device
*phydev
)
1443 /* Do a fake read */
1444 status
= phy_read(phydev
, MII_BMSR
);
1448 /* Read link and autonegotiation status */
1449 status
= phy_read(phydev
, MII_BMSR
);
1453 if ((status
& BMSR_LSTATUS
) == 0)
1460 EXPORT_SYMBOL(genphy_update_link
);
1463 * genphy_read_status - check the link status and update current link state
1464 * @phydev: target phy_device struct
1466 * Description: Check the link, then figure out the current state
1467 * by comparing what we advertise with what the link partner
1468 * advertises. Start by checking the gigabit possibilities,
1469 * then move on to 10/100.
1471 int genphy_read_status(struct phy_device
*phydev
)
1478 int common_adv_gb
= 0;
1480 /* Update the link, but return if there was an error */
1481 err
= genphy_update_link(phydev
);
1485 phydev
->lp_advertising
= 0;
1487 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
1488 if (phydev
->supported
& (SUPPORTED_1000baseT_Half
1489 | SUPPORTED_1000baseT_Full
)) {
1490 lpagb
= phy_read(phydev
, MII_STAT1000
);
1494 adv
= phy_read(phydev
, MII_CTRL1000
);
1498 phydev
->lp_advertising
=
1499 mii_stat1000_to_ethtool_lpa_t(lpagb
);
1500 common_adv_gb
= lpagb
& adv
<< 2;
1503 lpa
= phy_read(phydev
, MII_LPA
);
1507 phydev
->lp_advertising
|= mii_lpa_to_ethtool_lpa_t(lpa
);
1509 adv
= phy_read(phydev
, MII_ADVERTISE
);
1513 common_adv
= lpa
& adv
;
1515 phydev
->speed
= SPEED_10
;
1516 phydev
->duplex
= DUPLEX_HALF
;
1518 phydev
->asym_pause
= 0;
1520 if (common_adv_gb
& (LPA_1000FULL
| LPA_1000HALF
)) {
1521 phydev
->speed
= SPEED_1000
;
1523 if (common_adv_gb
& LPA_1000FULL
)
1524 phydev
->duplex
= DUPLEX_FULL
;
1525 } else if (common_adv
& (LPA_100FULL
| LPA_100HALF
)) {
1526 phydev
->speed
= SPEED_100
;
1528 if (common_adv
& LPA_100FULL
)
1529 phydev
->duplex
= DUPLEX_FULL
;
1531 if (common_adv
& LPA_10FULL
)
1532 phydev
->duplex
= DUPLEX_FULL
;
1534 if (phydev
->duplex
== DUPLEX_FULL
) {
1535 phydev
->pause
= lpa
& LPA_PAUSE_CAP
? 1 : 0;
1536 phydev
->asym_pause
= lpa
& LPA_PAUSE_ASYM
? 1 : 0;
1539 int bmcr
= phy_read(phydev
, MII_BMCR
);
1544 if (bmcr
& BMCR_FULLDPLX
)
1545 phydev
->duplex
= DUPLEX_FULL
;
1547 phydev
->duplex
= DUPLEX_HALF
;
1549 if (bmcr
& BMCR_SPEED1000
)
1550 phydev
->speed
= SPEED_1000
;
1551 else if (bmcr
& BMCR_SPEED100
)
1552 phydev
->speed
= SPEED_100
;
1554 phydev
->speed
= SPEED_10
;
1557 phydev
->asym_pause
= 0;
1562 EXPORT_SYMBOL(genphy_read_status
);
1565 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1566 * @phydev: target phy_device struct
1568 * Description: Perform a software PHY reset using the standard
1569 * BMCR_RESET bit and poll for the reset bit to be cleared.
1571 * Returns: 0 on success, < 0 on failure
1573 int genphy_soft_reset(struct phy_device
*phydev
)
1577 ret
= phy_write(phydev
, MII_BMCR
, BMCR_RESET
);
1581 return phy_poll_reset(phydev
);
1583 EXPORT_SYMBOL(genphy_soft_reset
);
1585 int genphy_config_init(struct phy_device
*phydev
)
1590 features
= (SUPPORTED_TP
| SUPPORTED_MII
1591 | SUPPORTED_AUI
| SUPPORTED_FIBRE
|
1592 SUPPORTED_BNC
| SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1594 /* Do we support autonegotiation? */
1595 val
= phy_read(phydev
, MII_BMSR
);
1599 if (val
& BMSR_ANEGCAPABLE
)
1600 features
|= SUPPORTED_Autoneg
;
1602 if (val
& BMSR_100FULL
)
1603 features
|= SUPPORTED_100baseT_Full
;
1604 if (val
& BMSR_100HALF
)
1605 features
|= SUPPORTED_100baseT_Half
;
1606 if (val
& BMSR_10FULL
)
1607 features
|= SUPPORTED_10baseT_Full
;
1608 if (val
& BMSR_10HALF
)
1609 features
|= SUPPORTED_10baseT_Half
;
1611 if (val
& BMSR_ESTATEN
) {
1612 val
= phy_read(phydev
, MII_ESTATUS
);
1616 if (val
& ESTATUS_1000_TFULL
)
1617 features
|= SUPPORTED_1000baseT_Full
;
1618 if (val
& ESTATUS_1000_THALF
)
1619 features
|= SUPPORTED_1000baseT_Half
;
1622 phydev
->supported
&= features
;
1623 phydev
->advertising
&= features
;
1627 EXPORT_SYMBOL(genphy_config_init
);
1629 int genphy_suspend(struct phy_device
*phydev
)
1633 mutex_lock(&phydev
->lock
);
1635 value
= phy_read(phydev
, MII_BMCR
);
1636 phy_write(phydev
, MII_BMCR
, value
| BMCR_PDOWN
);
1638 mutex_unlock(&phydev
->lock
);
1642 EXPORT_SYMBOL(genphy_suspend
);
1644 int genphy_resume(struct phy_device
*phydev
)
1648 value
= phy_read(phydev
, MII_BMCR
);
1649 phy_write(phydev
, MII_BMCR
, value
& ~BMCR_PDOWN
);
1653 EXPORT_SYMBOL(genphy_resume
);
1655 int genphy_loopback(struct phy_device
*phydev
, bool enable
)
1659 value
= phy_read(phydev
, MII_BMCR
);
1664 value
|= BMCR_LOOPBACK
;
1666 value
&= ~BMCR_LOOPBACK
;
1668 return phy_write(phydev
, MII_BMCR
, value
);
1670 EXPORT_SYMBOL(genphy_loopback
);
1672 static int __set_phy_supported(struct phy_device
*phydev
, u32 max_speed
)
1674 /* The default values for phydev->supported are provided by the PHY
1675 * driver "features" member, we want to reset to sane defaults first
1676 * before supporting higher speeds.
1678 phydev
->supported
&= PHY_DEFAULT_FEATURES
;
1680 switch (max_speed
) {
1684 phydev
->supported
|= PHY_1000BT_FEATURES
;
1687 phydev
->supported
|= PHY_100BT_FEATURES
;
1690 phydev
->supported
|= PHY_10BT_FEATURES
;
1696 int phy_set_max_speed(struct phy_device
*phydev
, u32 max_speed
)
1700 err
= __set_phy_supported(phydev
, max_speed
);
1704 phydev
->advertising
= phydev
->supported
;
1708 EXPORT_SYMBOL(phy_set_max_speed
);
1710 static void of_set_phy_supported(struct phy_device
*phydev
)
1712 struct device_node
*node
= phydev
->mdio
.dev
.of_node
;
1715 if (!IS_ENABLED(CONFIG_OF_MDIO
))
1721 if (!of_property_read_u32(node
, "max-speed", &max_speed
))
1722 __set_phy_supported(phydev
, max_speed
);
1725 static void of_set_phy_eee_broken(struct phy_device
*phydev
)
1727 struct device_node
*node
= phydev
->mdio
.dev
.of_node
;
1730 if (!IS_ENABLED(CONFIG_OF_MDIO
))
1736 if (of_property_read_bool(node
, "eee-broken-100tx"))
1737 broken
|= MDIO_EEE_100TX
;
1738 if (of_property_read_bool(node
, "eee-broken-1000t"))
1739 broken
|= MDIO_EEE_1000T
;
1740 if (of_property_read_bool(node
, "eee-broken-10gt"))
1741 broken
|= MDIO_EEE_10GT
;
1742 if (of_property_read_bool(node
, "eee-broken-1000kx"))
1743 broken
|= MDIO_EEE_1000KX
;
1744 if (of_property_read_bool(node
, "eee-broken-10gkx4"))
1745 broken
|= MDIO_EEE_10GKX4
;
1746 if (of_property_read_bool(node
, "eee-broken-10gkr"))
1747 broken
|= MDIO_EEE_10GKR
;
1749 phydev
->eee_broken_modes
= broken
;
1753 * phy_probe - probe and init a PHY device
1754 * @dev: device to probe and init
1756 * Description: Take care of setting up the phy_device structure,
1757 * set the state to READY (the driver's init function should
1758 * set it to STARTING if needed).
1760 static int phy_probe(struct device
*dev
)
1762 struct phy_device
*phydev
= to_phy_device(dev
);
1763 struct device_driver
*drv
= phydev
->mdio
.dev
.driver
;
1764 struct phy_driver
*phydrv
= to_phy_driver(drv
);
1767 phydev
->drv
= phydrv
;
1769 /* Disable the interrupt if the PHY doesn't support it
1770 * but the interrupt is still a valid one
1772 if (!(phydrv
->flags
& PHY_HAS_INTERRUPT
) &&
1773 phy_interrupt_is_valid(phydev
))
1774 phydev
->irq
= PHY_POLL
;
1776 if (phydrv
->flags
& PHY_IS_INTERNAL
)
1777 phydev
->is_internal
= true;
1779 mutex_lock(&phydev
->lock
);
1781 /* Start out supporting everything. Eventually,
1782 * a controller will attach, and may modify one
1783 * or both of these values
1785 phydev
->supported
= phydrv
->features
;
1786 of_set_phy_supported(phydev
);
1787 phydev
->advertising
= phydev
->supported
;
1789 /* Get the EEE modes we want to prohibit. We will ask
1790 * the PHY stop advertising these mode later on
1792 of_set_phy_eee_broken(phydev
);
1794 /* The Pause Frame bits indicate that the PHY can support passing
1795 * pause frames. During autonegotiation, the PHYs will determine if
1796 * they should allow pause frames to pass. The MAC driver should then
1797 * use that result to determine whether to enable flow control via
1800 * Normally, PHY drivers should not set the Pause bits, and instead
1801 * allow phylib to do that. However, there may be some situations
1802 * (e.g. hardware erratum) where the driver wants to set only one
1805 if (phydrv
->features
& (SUPPORTED_Pause
| SUPPORTED_Asym_Pause
)) {
1806 phydev
->supported
&= ~(SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1807 phydev
->supported
|= phydrv
->features
&
1808 (SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1810 phydev
->supported
|= SUPPORTED_Pause
| SUPPORTED_Asym_Pause
;
1813 /* Set the state to READY by default */
1814 phydev
->state
= PHY_READY
;
1816 if (phydev
->drv
->probe
)
1817 err
= phydev
->drv
->probe(phydev
);
1819 mutex_unlock(&phydev
->lock
);
1824 static int phy_remove(struct device
*dev
)
1826 struct phy_device
*phydev
= to_phy_device(dev
);
1828 cancel_delayed_work_sync(&phydev
->state_queue
);
1830 mutex_lock(&phydev
->lock
);
1831 phydev
->state
= PHY_DOWN
;
1832 mutex_unlock(&phydev
->lock
);
1834 if (phydev
->drv
&& phydev
->drv
->remove
)
1835 phydev
->drv
->remove(phydev
);
1842 * phy_driver_register - register a phy_driver with the PHY layer
1843 * @new_driver: new phy_driver to register
1844 * @owner: module owning this PHY
1846 int phy_driver_register(struct phy_driver
*new_driver
, struct module
*owner
)
1850 new_driver
->mdiodrv
.flags
|= MDIO_DEVICE_IS_PHY
;
1851 new_driver
->mdiodrv
.driver
.name
= new_driver
->name
;
1852 new_driver
->mdiodrv
.driver
.bus
= &mdio_bus_type
;
1853 new_driver
->mdiodrv
.driver
.probe
= phy_probe
;
1854 new_driver
->mdiodrv
.driver
.remove
= phy_remove
;
1855 new_driver
->mdiodrv
.driver
.owner
= owner
;
1857 retval
= driver_register(&new_driver
->mdiodrv
.driver
);
1859 pr_err("%s: Error %d in registering driver\n",
1860 new_driver
->name
, retval
);
1865 pr_debug("%s: Registered new driver\n", new_driver
->name
);
1869 EXPORT_SYMBOL(phy_driver_register
);
1871 int phy_drivers_register(struct phy_driver
*new_driver
, int n
,
1872 struct module
*owner
)
1876 for (i
= 0; i
< n
; i
++) {
1877 ret
= phy_driver_register(new_driver
+ i
, owner
);
1880 phy_driver_unregister(new_driver
+ i
);
1886 EXPORT_SYMBOL(phy_drivers_register
);
1888 void phy_driver_unregister(struct phy_driver
*drv
)
1890 driver_unregister(&drv
->mdiodrv
.driver
);
1892 EXPORT_SYMBOL(phy_driver_unregister
);
1894 void phy_drivers_unregister(struct phy_driver
*drv
, int n
)
1898 for (i
= 0; i
< n
; i
++)
1899 phy_driver_unregister(drv
+ i
);
1901 EXPORT_SYMBOL(phy_drivers_unregister
);
1903 static struct phy_driver genphy_driver
= {
1904 .phy_id
= 0xffffffff,
1905 .phy_id_mask
= 0xffffffff,
1906 .name
= "Generic PHY",
1907 .soft_reset
= genphy_no_soft_reset
,
1908 .config_init
= genphy_config_init
,
1909 .features
= PHY_GBIT_FEATURES
| SUPPORTED_MII
|
1910 SUPPORTED_AUI
| SUPPORTED_FIBRE
|
1912 .config_aneg
= genphy_config_aneg
,
1913 .aneg_done
= genphy_aneg_done
,
1914 .read_status
= genphy_read_status
,
1915 .suspend
= genphy_suspend
,
1916 .resume
= genphy_resume
,
1917 .set_loopback
= genphy_loopback
,
1920 static int __init
phy_init(void)
1924 rc
= mdio_bus_init();
1928 rc
= phy_driver_register(&genphy_10g_driver
, THIS_MODULE
);
1932 rc
= phy_driver_register(&genphy_driver
, THIS_MODULE
);
1934 phy_driver_unregister(&genphy_10g_driver
);
1942 static void __exit
phy_exit(void)
1944 phy_driver_unregister(&genphy_10g_driver
);
1945 phy_driver_unregister(&genphy_driver
);
1949 subsys_initcall(phy_init
);
1950 module_exit(phy_exit
);