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 phydev
->dev_flags
= flags
;
966 phydev
->interface
= interface
;
968 phydev
->state
= PHY_READY
;
970 /* Initial carrier state is off as the phy is about to be
973 netif_carrier_off(phydev
->attached_dev
);
975 /* Do initial configuration here, now that
976 * we have certain key parameters
977 * (dev_flags and interface)
979 err
= phy_init_hw(phydev
);
984 phy_led_triggers_register(phydev
);
989 /* phy_detach() does all of the cleanup below */
994 module_put(d
->driver
->owner
);
997 if (ndev_owner
!= bus
->owner
)
998 module_put(bus
->owner
);
1001 EXPORT_SYMBOL(phy_attach_direct
);
1004 * phy_attach - attach a network device to a particular PHY device
1005 * @dev: network device to attach
1006 * @bus_id: Bus ID of PHY device to attach
1007 * @interface: PHY device's interface
1009 * Description: Same as phy_attach_direct() except that a PHY bus_id
1010 * string is passed instead of a pointer to a struct phy_device.
1012 struct phy_device
*phy_attach(struct net_device
*dev
, const char *bus_id
,
1013 phy_interface_t interface
)
1015 struct bus_type
*bus
= &mdio_bus_type
;
1016 struct phy_device
*phydev
;
1020 /* Search the list of PHY devices on the mdio bus for the
1021 * PHY with the requested name
1023 d
= bus_find_device_by_name(bus
, NULL
, bus_id
);
1025 pr_err("PHY %s not found\n", bus_id
);
1026 return ERR_PTR(-ENODEV
);
1028 phydev
= to_phy_device(d
);
1030 rc
= phy_attach_direct(dev
, phydev
, phydev
->dev_flags
, interface
);
1037 EXPORT_SYMBOL(phy_attach
);
1040 * phy_detach - detach a PHY device from its network device
1041 * @phydev: target phy_device struct
1043 * This detaches the phy device from its network device and the phy
1044 * driver, and drops the reference count taken in phy_attach_direct().
1046 void phy_detach(struct phy_device
*phydev
)
1048 struct net_device
*dev
= phydev
->attached_dev
;
1049 struct module
*ndev_owner
= dev
->dev
.parent
->driver
->owner
;
1050 struct mii_bus
*bus
;
1053 phydev
->attached_dev
->phydev
= NULL
;
1054 phydev
->attached_dev
= NULL
;
1055 phy_suspend(phydev
);
1057 phy_led_triggers_unregister(phydev
);
1059 module_put(phydev
->mdio
.dev
.driver
->owner
);
1061 /* If the device had no specific driver before (i.e. - it
1062 * was using the generic driver), we unbind the device
1063 * from the generic driver so that there's a chance a
1064 * real driver could be loaded
1066 for (i
= 0; i
< ARRAY_SIZE(genphy_driver
); i
++) {
1067 if (phydev
->mdio
.dev
.driver
==
1068 &genphy_driver
[i
].mdiodrv
.driver
) {
1069 device_release_driver(&phydev
->mdio
.dev
);
1075 * The phydev might go away on the put_device() below, so avoid
1076 * a use-after-free bug by reading the underlying bus first.
1078 bus
= phydev
->mdio
.bus
;
1080 put_device(&phydev
->mdio
.dev
);
1081 if (ndev_owner
!= bus
->owner
)
1082 module_put(bus
->owner
);
1084 EXPORT_SYMBOL(phy_detach
);
1086 int phy_suspend(struct phy_device
*phydev
)
1088 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1089 struct ethtool_wolinfo wol
= { .cmd
= ETHTOOL_GWOL
};
1092 /* If the device has WOL enabled, we cannot suspend the PHY */
1093 phy_ethtool_get_wol(phydev
, &wol
);
1097 if (phydev
->drv
&& phydrv
->suspend
)
1098 ret
= phydrv
->suspend(phydev
);
1103 phydev
->suspended
= true;
1107 EXPORT_SYMBOL(phy_suspend
);
1109 int phy_resume(struct phy_device
*phydev
)
1111 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1114 if (phydev
->drv
&& phydrv
->resume
)
1115 ret
= phydrv
->resume(phydev
);
1120 phydev
->suspended
= false;
1124 EXPORT_SYMBOL(phy_resume
);
1126 /* Generic PHY support and helper functions */
1129 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1130 * @phydev: target phy_device struct
1132 * Description: Writes MII_ADVERTISE with the appropriate values,
1133 * after sanitizing the values to make sure we only advertise
1134 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1135 * hasn't changed, and > 0 if it has changed.
1137 static int genphy_config_advert(struct phy_device
*phydev
)
1140 int oldadv
, adv
, bmsr
;
1141 int err
, changed
= 0;
1143 /* Only allow advertising what this PHY supports */
1144 phydev
->advertising
&= phydev
->supported
;
1145 advertise
= phydev
->advertising
;
1147 /* Setup standard advertisement */
1148 adv
= phy_read(phydev
, MII_ADVERTISE
);
1153 adv
&= ~(ADVERTISE_ALL
| ADVERTISE_100BASE4
| ADVERTISE_PAUSE_CAP
|
1154 ADVERTISE_PAUSE_ASYM
);
1155 adv
|= ethtool_adv_to_mii_adv_t(advertise
);
1157 if (adv
!= oldadv
) {
1158 err
= phy_write(phydev
, MII_ADVERTISE
, adv
);
1165 bmsr
= phy_read(phydev
, MII_BMSR
);
1169 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1170 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1173 if (!(bmsr
& BMSR_ESTATEN
))
1176 /* Configure gigabit if it's supported */
1177 adv
= phy_read(phydev
, MII_CTRL1000
);
1182 adv
&= ~(ADVERTISE_1000FULL
| ADVERTISE_1000HALF
);
1184 if (phydev
->supported
& (SUPPORTED_1000baseT_Half
|
1185 SUPPORTED_1000baseT_Full
)) {
1186 adv
|= ethtool_adv_to_mii_ctrl1000_t(advertise
);
1192 err
= phy_write(phydev
, MII_CTRL1000
, adv
);
1200 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1201 * @phydev: target phy_device struct
1203 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1204 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1205 * changed, and 1 if it has changed.
1207 static int genphy_config_eee_advert(struct phy_device
*phydev
)
1209 int broken
= phydev
->eee_broken_modes
;
1212 /* Nothing to disable */
1216 /* If the following call fails, we assume that EEE is not
1217 * supported by the phy. If we read 0, EEE is not advertised
1218 * In both case, we don't need to continue
1220 adv
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
, MDIO_MMD_AN
);
1227 /* Advertising remains unchanged with the broken mask */
1231 phy_write_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
, MDIO_MMD_AN
, adv
);
1237 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1238 * @phydev: target phy_device struct
1240 * Description: Configures MII_BMCR to force speed/duplex
1241 * to the values in phydev. Assumes that the values are valid.
1242 * Please see phy_sanitize_settings().
1244 int genphy_setup_forced(struct phy_device
*phydev
)
1246 int ctl
= phy_read(phydev
, MII_BMCR
);
1248 ctl
&= BMCR_LOOPBACK
| BMCR_ISOLATE
| BMCR_PDOWN
;
1250 phydev
->asym_pause
= 0;
1252 if (SPEED_1000
== phydev
->speed
)
1253 ctl
|= BMCR_SPEED1000
;
1254 else if (SPEED_100
== phydev
->speed
)
1255 ctl
|= BMCR_SPEED100
;
1257 if (DUPLEX_FULL
== phydev
->duplex
)
1258 ctl
|= BMCR_FULLDPLX
;
1260 return phy_write(phydev
, MII_BMCR
, ctl
);
1262 EXPORT_SYMBOL(genphy_setup_forced
);
1265 * genphy_restart_aneg - Enable and Restart Autonegotiation
1266 * @phydev: target phy_device struct
1268 int genphy_restart_aneg(struct phy_device
*phydev
)
1270 int ctl
= phy_read(phydev
, MII_BMCR
);
1275 ctl
|= BMCR_ANENABLE
| BMCR_ANRESTART
;
1277 /* Don't isolate the PHY if we're negotiating */
1278 ctl
&= ~BMCR_ISOLATE
;
1280 return phy_write(phydev
, MII_BMCR
, ctl
);
1282 EXPORT_SYMBOL(genphy_restart_aneg
);
1285 * genphy_config_aneg - restart auto-negotiation or write BMCR
1286 * @phydev: target phy_device struct
1288 * Description: If auto-negotiation is enabled, we configure the
1289 * advertising, and then restart auto-negotiation. If it is not
1290 * enabled, then we write the BMCR.
1292 int genphy_config_aneg(struct phy_device
*phydev
)
1296 changed
= genphy_config_eee_advert(phydev
);
1298 if (AUTONEG_ENABLE
!= phydev
->autoneg
)
1299 return genphy_setup_forced(phydev
);
1301 err
= genphy_config_advert(phydev
);
1302 if (err
< 0) /* error */
1308 /* Advertisement hasn't changed, but maybe aneg was never on to
1309 * begin with? Or maybe phy was isolated?
1311 int ctl
= phy_read(phydev
, MII_BMCR
);
1316 if (!(ctl
& BMCR_ANENABLE
) || (ctl
& BMCR_ISOLATE
))
1317 changed
= 1; /* do restart aneg */
1320 /* Only restart aneg if we are advertising something different
1321 * than we were before.
1324 return genphy_restart_aneg(phydev
);
1328 EXPORT_SYMBOL(genphy_config_aneg
);
1331 * genphy_aneg_done - return auto-negotiation status
1332 * @phydev: target phy_device struct
1334 * Description: Reads the status register and returns 0 either if
1335 * auto-negotiation is incomplete, or if there was an error.
1336 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1338 int genphy_aneg_done(struct phy_device
*phydev
)
1340 int retval
= phy_read(phydev
, MII_BMSR
);
1342 return (retval
< 0) ? retval
: (retval
& BMSR_ANEGCOMPLETE
);
1344 EXPORT_SYMBOL(genphy_aneg_done
);
1346 static int gen10g_config_aneg(struct phy_device
*phydev
)
1352 * genphy_update_link - update link status in @phydev
1353 * @phydev: target phy_device struct
1355 * Description: Update the value in phydev->link to reflect the
1356 * current link value. In order to do this, we need to read
1357 * the status register twice, keeping the second value.
1359 int genphy_update_link(struct phy_device
*phydev
)
1363 /* Do a fake read */
1364 status
= phy_read(phydev
, MII_BMSR
);
1368 /* Read link and autonegotiation status */
1369 status
= phy_read(phydev
, MII_BMSR
);
1373 if ((status
& BMSR_LSTATUS
) == 0)
1380 EXPORT_SYMBOL(genphy_update_link
);
1383 * genphy_read_status - check the link status and update current link state
1384 * @phydev: target phy_device struct
1386 * Description: Check the link, then figure out the current state
1387 * by comparing what we advertise with what the link partner
1388 * advertises. Start by checking the gigabit possibilities,
1389 * then move on to 10/100.
1391 int genphy_read_status(struct phy_device
*phydev
)
1398 int common_adv_gb
= 0;
1400 /* Update the link, but return if there was an error */
1401 err
= genphy_update_link(phydev
);
1405 phydev
->lp_advertising
= 0;
1407 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
1408 if (phydev
->supported
& (SUPPORTED_1000baseT_Half
1409 | SUPPORTED_1000baseT_Full
)) {
1410 lpagb
= phy_read(phydev
, MII_STAT1000
);
1414 adv
= phy_read(phydev
, MII_CTRL1000
);
1418 phydev
->lp_advertising
=
1419 mii_stat1000_to_ethtool_lpa_t(lpagb
);
1420 common_adv_gb
= lpagb
& adv
<< 2;
1423 lpa
= phy_read(phydev
, MII_LPA
);
1427 phydev
->lp_advertising
|= mii_lpa_to_ethtool_lpa_t(lpa
);
1429 adv
= phy_read(phydev
, MII_ADVERTISE
);
1433 common_adv
= lpa
& adv
;
1435 phydev
->speed
= SPEED_10
;
1436 phydev
->duplex
= DUPLEX_HALF
;
1438 phydev
->asym_pause
= 0;
1440 if (common_adv_gb
& (LPA_1000FULL
| LPA_1000HALF
)) {
1441 phydev
->speed
= SPEED_1000
;
1443 if (common_adv_gb
& LPA_1000FULL
)
1444 phydev
->duplex
= DUPLEX_FULL
;
1445 } else if (common_adv
& (LPA_100FULL
| LPA_100HALF
)) {
1446 phydev
->speed
= SPEED_100
;
1448 if (common_adv
& LPA_100FULL
)
1449 phydev
->duplex
= DUPLEX_FULL
;
1451 if (common_adv
& LPA_10FULL
)
1452 phydev
->duplex
= DUPLEX_FULL
;
1454 if (phydev
->duplex
== DUPLEX_FULL
) {
1455 phydev
->pause
= lpa
& LPA_PAUSE_CAP
? 1 : 0;
1456 phydev
->asym_pause
= lpa
& LPA_PAUSE_ASYM
? 1 : 0;
1459 int bmcr
= phy_read(phydev
, MII_BMCR
);
1464 if (bmcr
& BMCR_FULLDPLX
)
1465 phydev
->duplex
= DUPLEX_FULL
;
1467 phydev
->duplex
= DUPLEX_HALF
;
1469 if (bmcr
& BMCR_SPEED1000
)
1470 phydev
->speed
= SPEED_1000
;
1471 else if (bmcr
& BMCR_SPEED100
)
1472 phydev
->speed
= SPEED_100
;
1474 phydev
->speed
= SPEED_10
;
1477 phydev
->asym_pause
= 0;
1482 EXPORT_SYMBOL(genphy_read_status
);
1484 static int gen10g_read_status(struct phy_device
*phydev
)
1487 u32 mmd_mask
= phydev
->c45_ids
.devices_in_package
;
1491 /* For now just lie and say it's 10G all the time */
1492 phydev
->speed
= SPEED_10000
;
1493 phydev
->duplex
= DUPLEX_FULL
;
1495 for (devad
= 0; mmd_mask
; devad
++, mmd_mask
= mmd_mask
>> 1) {
1496 if (!(mmd_mask
& 1))
1499 /* Read twice because link state is latched and a
1500 * read moves the current state into the register
1502 phy_read_mmd(phydev
, devad
, MDIO_STAT1
);
1503 reg
= phy_read_mmd(phydev
, devad
, MDIO_STAT1
);
1504 if (reg
< 0 || !(reg
& MDIO_STAT1_LSTATUS
))
1512 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1513 * @phydev: target phy_device struct
1515 * Description: Perform a software PHY reset using the standard
1516 * BMCR_RESET bit and poll for the reset bit to be cleared.
1518 * Returns: 0 on success, < 0 on failure
1520 int genphy_soft_reset(struct phy_device
*phydev
)
1524 ret
= phy_write(phydev
, MII_BMCR
, BMCR_RESET
);
1528 return phy_poll_reset(phydev
);
1530 EXPORT_SYMBOL(genphy_soft_reset
);
1532 int genphy_config_init(struct phy_device
*phydev
)
1537 features
= (SUPPORTED_TP
| SUPPORTED_MII
1538 | SUPPORTED_AUI
| SUPPORTED_FIBRE
|
1539 SUPPORTED_BNC
| SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1541 /* Do we support autonegotiation? */
1542 val
= phy_read(phydev
, MII_BMSR
);
1546 if (val
& BMSR_ANEGCAPABLE
)
1547 features
|= SUPPORTED_Autoneg
;
1549 if (val
& BMSR_100FULL
)
1550 features
|= SUPPORTED_100baseT_Full
;
1551 if (val
& BMSR_100HALF
)
1552 features
|= SUPPORTED_100baseT_Half
;
1553 if (val
& BMSR_10FULL
)
1554 features
|= SUPPORTED_10baseT_Full
;
1555 if (val
& BMSR_10HALF
)
1556 features
|= SUPPORTED_10baseT_Half
;
1558 if (val
& BMSR_ESTATEN
) {
1559 val
= phy_read(phydev
, MII_ESTATUS
);
1563 if (val
& ESTATUS_1000_TFULL
)
1564 features
|= SUPPORTED_1000baseT_Full
;
1565 if (val
& ESTATUS_1000_THALF
)
1566 features
|= SUPPORTED_1000baseT_Half
;
1569 phydev
->supported
&= features
;
1570 phydev
->advertising
&= features
;
1575 static int gen10g_soft_reset(struct phy_device
*phydev
)
1577 /* Do nothing for now */
1580 EXPORT_SYMBOL(genphy_config_init
);
1582 static int gen10g_config_init(struct phy_device
*phydev
)
1584 /* Temporarily just say we support everything */
1585 phydev
->supported
= SUPPORTED_10000baseT_Full
;
1586 phydev
->advertising
= SUPPORTED_10000baseT_Full
;
1591 int genphy_suspend(struct phy_device
*phydev
)
1595 mutex_lock(&phydev
->lock
);
1597 value
= phy_read(phydev
, MII_BMCR
);
1598 phy_write(phydev
, MII_BMCR
, value
| BMCR_PDOWN
);
1600 mutex_unlock(&phydev
->lock
);
1604 EXPORT_SYMBOL(genphy_suspend
);
1606 static int gen10g_suspend(struct phy_device
*phydev
)
1611 int genphy_resume(struct phy_device
*phydev
)
1615 mutex_lock(&phydev
->lock
);
1617 value
= phy_read(phydev
, MII_BMCR
);
1618 phy_write(phydev
, MII_BMCR
, value
& ~BMCR_PDOWN
);
1620 mutex_unlock(&phydev
->lock
);
1624 EXPORT_SYMBOL(genphy_resume
);
1626 static int gen10g_resume(struct phy_device
*phydev
)
1631 static int __set_phy_supported(struct phy_device
*phydev
, u32 max_speed
)
1633 /* The default values for phydev->supported are provided by the PHY
1634 * driver "features" member, we want to reset to sane defaults first
1635 * before supporting higher speeds.
1637 phydev
->supported
&= PHY_DEFAULT_FEATURES
;
1639 switch (max_speed
) {
1643 phydev
->supported
|= PHY_1000BT_FEATURES
;
1646 phydev
->supported
|= PHY_100BT_FEATURES
;
1649 phydev
->supported
|= PHY_10BT_FEATURES
;
1655 int phy_set_max_speed(struct phy_device
*phydev
, u32 max_speed
)
1659 err
= __set_phy_supported(phydev
, max_speed
);
1663 phydev
->advertising
= phydev
->supported
;
1667 EXPORT_SYMBOL(phy_set_max_speed
);
1669 static void of_set_phy_supported(struct phy_device
*phydev
)
1671 struct device_node
*node
= phydev
->mdio
.dev
.of_node
;
1674 if (!IS_ENABLED(CONFIG_OF_MDIO
))
1680 if (!of_property_read_u32(node
, "max-speed", &max_speed
))
1681 __set_phy_supported(phydev
, max_speed
);
1684 static void of_set_phy_eee_broken(struct phy_device
*phydev
)
1686 struct device_node
*node
= phydev
->mdio
.dev
.of_node
;
1689 if (!IS_ENABLED(CONFIG_OF_MDIO
))
1695 if (of_property_read_bool(node
, "eee-broken-100tx"))
1696 broken
|= MDIO_EEE_100TX
;
1697 if (of_property_read_bool(node
, "eee-broken-1000t"))
1698 broken
|= MDIO_EEE_1000T
;
1699 if (of_property_read_bool(node
, "eee-broken-10gt"))
1700 broken
|= MDIO_EEE_10GT
;
1701 if (of_property_read_bool(node
, "eee-broken-1000kx"))
1702 broken
|= MDIO_EEE_1000KX
;
1703 if (of_property_read_bool(node
, "eee-broken-10gkx4"))
1704 broken
|= MDIO_EEE_10GKX4
;
1705 if (of_property_read_bool(node
, "eee-broken-10gkr"))
1706 broken
|= MDIO_EEE_10GKR
;
1708 phydev
->eee_broken_modes
= broken
;
1712 * phy_probe - probe and init a PHY device
1713 * @dev: device to probe and init
1715 * Description: Take care of setting up the phy_device structure,
1716 * set the state to READY (the driver's init function should
1717 * set it to STARTING if needed).
1719 static int phy_probe(struct device
*dev
)
1721 struct phy_device
*phydev
= to_phy_device(dev
);
1722 struct device_driver
*drv
= phydev
->mdio
.dev
.driver
;
1723 struct phy_driver
*phydrv
= to_phy_driver(drv
);
1726 phydev
->drv
= phydrv
;
1728 /* Disable the interrupt if the PHY doesn't support it
1729 * but the interrupt is still a valid one
1731 if (!(phydrv
->flags
& PHY_HAS_INTERRUPT
) &&
1732 phy_interrupt_is_valid(phydev
))
1733 phydev
->irq
= PHY_POLL
;
1735 if (phydrv
->flags
& PHY_IS_INTERNAL
)
1736 phydev
->is_internal
= true;
1738 mutex_lock(&phydev
->lock
);
1740 /* Start out supporting everything. Eventually,
1741 * a controller will attach, and may modify one
1742 * or both of these values
1744 phydev
->supported
= phydrv
->features
;
1745 of_set_phy_supported(phydev
);
1746 phydev
->advertising
= phydev
->supported
;
1748 /* Get the EEE modes we want to prohibit. We will ask
1749 * the PHY stop advertising these mode later on
1751 of_set_phy_eee_broken(phydev
);
1753 /* The Pause Frame bits indicate that the PHY can support passing
1754 * pause frames. During autonegotiation, the PHYs will determine if
1755 * they should allow pause frames to pass. The MAC driver should then
1756 * use that result to determine whether to enable flow control via
1759 * Normally, PHY drivers should not set the Pause bits, and instead
1760 * allow phylib to do that. However, there may be some situations
1761 * (e.g. hardware erratum) where the driver wants to set only one
1764 if (phydrv
->features
& (SUPPORTED_Pause
| SUPPORTED_Asym_Pause
)) {
1765 phydev
->supported
&= ~(SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1766 phydev
->supported
|= phydrv
->features
&
1767 (SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1769 phydev
->supported
|= SUPPORTED_Pause
| SUPPORTED_Asym_Pause
;
1772 /* Set the state to READY by default */
1773 phydev
->state
= PHY_READY
;
1775 if (phydev
->drv
->probe
)
1776 err
= phydev
->drv
->probe(phydev
);
1778 mutex_unlock(&phydev
->lock
);
1783 static int phy_remove(struct device
*dev
)
1785 struct phy_device
*phydev
= to_phy_device(dev
);
1787 cancel_delayed_work_sync(&phydev
->state_queue
);
1789 mutex_lock(&phydev
->lock
);
1790 phydev
->state
= PHY_DOWN
;
1791 mutex_unlock(&phydev
->lock
);
1793 if (phydev
->drv
&& phydev
->drv
->remove
)
1794 phydev
->drv
->remove(phydev
);
1801 * phy_driver_register - register a phy_driver with the PHY layer
1802 * @new_driver: new phy_driver to register
1803 * @owner: module owning this PHY
1805 int phy_driver_register(struct phy_driver
*new_driver
, struct module
*owner
)
1809 new_driver
->mdiodrv
.flags
|= MDIO_DEVICE_IS_PHY
;
1810 new_driver
->mdiodrv
.driver
.name
= new_driver
->name
;
1811 new_driver
->mdiodrv
.driver
.bus
= &mdio_bus_type
;
1812 new_driver
->mdiodrv
.driver
.probe
= phy_probe
;
1813 new_driver
->mdiodrv
.driver
.remove
= phy_remove
;
1814 new_driver
->mdiodrv
.driver
.owner
= owner
;
1816 retval
= driver_register(&new_driver
->mdiodrv
.driver
);
1818 pr_err("%s: Error %d in registering driver\n",
1819 new_driver
->name
, retval
);
1824 pr_debug("%s: Registered new driver\n", new_driver
->name
);
1828 EXPORT_SYMBOL(phy_driver_register
);
1830 int phy_drivers_register(struct phy_driver
*new_driver
, int n
,
1831 struct module
*owner
)
1835 for (i
= 0; i
< n
; i
++) {
1836 ret
= phy_driver_register(new_driver
+ i
, owner
);
1839 phy_driver_unregister(new_driver
+ i
);
1845 EXPORT_SYMBOL(phy_drivers_register
);
1847 void phy_driver_unregister(struct phy_driver
*drv
)
1849 driver_unregister(&drv
->mdiodrv
.driver
);
1851 EXPORT_SYMBOL(phy_driver_unregister
);
1853 void phy_drivers_unregister(struct phy_driver
*drv
, int n
)
1857 for (i
= 0; i
< n
; i
++)
1858 phy_driver_unregister(drv
+ i
);
1860 EXPORT_SYMBOL(phy_drivers_unregister
);
1862 static struct phy_driver genphy_driver
[] = {
1864 .phy_id
= 0xffffffff,
1865 .phy_id_mask
= 0xffffffff,
1866 .name
= "Generic PHY",
1867 .soft_reset
= genphy_no_soft_reset
,
1868 .config_init
= genphy_config_init
,
1869 .features
= PHY_GBIT_FEATURES
| SUPPORTED_MII
|
1870 SUPPORTED_AUI
| SUPPORTED_FIBRE
|
1872 .config_aneg
= genphy_config_aneg
,
1873 .aneg_done
= genphy_aneg_done
,
1874 .read_status
= genphy_read_status
,
1875 .suspend
= genphy_suspend
,
1876 .resume
= genphy_resume
,
1878 .phy_id
= 0xffffffff,
1879 .phy_id_mask
= 0xffffffff,
1880 .name
= "Generic 10G PHY",
1881 .soft_reset
= gen10g_soft_reset
,
1882 .config_init
= gen10g_config_init
,
1884 .config_aneg
= gen10g_config_aneg
,
1885 .read_status
= gen10g_read_status
,
1886 .suspend
= gen10g_suspend
,
1887 .resume
= gen10g_resume
,
1890 static int __init
phy_init(void)
1894 rc
= mdio_bus_init();
1898 rc
= phy_drivers_register(genphy_driver
,
1899 ARRAY_SIZE(genphy_driver
), THIS_MODULE
);
1906 static void __exit
phy_exit(void)
1908 phy_drivers_unregister(genphy_driver
,
1909 ARRAY_SIZE(genphy_driver
));
1913 subsys_initcall(phy_init
);
1914 module_exit(phy_exit
);