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 ret
= phy_resume(phydev
);
143 if (phydev
->attached_dev
&& phydev
->adjust_link
)
144 phy_start_machine(phydev
);
149 static int mdio_bus_phy_restore(struct device
*dev
)
151 struct phy_device
*phydev
= to_phy_device(dev
);
152 struct net_device
*netdev
= phydev
->attached_dev
;
158 ret
= phy_init_hw(phydev
);
162 /* The PHY needs to renegotiate. */
164 phydev
->state
= PHY_UP
;
166 phy_start_machine(phydev
);
171 static const struct dev_pm_ops mdio_bus_phy_pm_ops
= {
172 .suspend
= mdio_bus_phy_suspend
,
173 .resume
= mdio_bus_phy_resume
,
174 .freeze
= mdio_bus_phy_suspend
,
175 .thaw
= mdio_bus_phy_resume
,
176 .restore
= mdio_bus_phy_restore
,
179 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
183 #define MDIO_BUS_PHY_PM_OPS NULL
185 #endif /* CONFIG_PM */
188 * phy_register_fixup - creates a new phy_fixup and adds it to the list
189 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
190 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
191 * It can also be PHY_ANY_UID
192 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
194 * @run: The actual code to be run when a matching PHY is found
196 int phy_register_fixup(const char *bus_id
, u32 phy_uid
, u32 phy_uid_mask
,
197 int (*run
)(struct phy_device
*))
199 struct phy_fixup
*fixup
= kzalloc(sizeof(*fixup
), GFP_KERNEL
);
204 strlcpy(fixup
->bus_id
, bus_id
, sizeof(fixup
->bus_id
));
205 fixup
->phy_uid
= phy_uid
;
206 fixup
->phy_uid_mask
= phy_uid_mask
;
209 mutex_lock(&phy_fixup_lock
);
210 list_add_tail(&fixup
->list
, &phy_fixup_list
);
211 mutex_unlock(&phy_fixup_lock
);
215 EXPORT_SYMBOL(phy_register_fixup
);
217 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
218 int phy_register_fixup_for_uid(u32 phy_uid
, u32 phy_uid_mask
,
219 int (*run
)(struct phy_device
*))
221 return phy_register_fixup(PHY_ANY_ID
, phy_uid
, phy_uid_mask
, run
);
223 EXPORT_SYMBOL(phy_register_fixup_for_uid
);
225 /* Registers a fixup to be run on the PHY with id string bus_id */
226 int phy_register_fixup_for_id(const char *bus_id
,
227 int (*run
)(struct phy_device
*))
229 return phy_register_fixup(bus_id
, PHY_ANY_UID
, 0xffffffff, run
);
231 EXPORT_SYMBOL(phy_register_fixup_for_id
);
234 * phy_unregister_fixup - remove a phy_fixup from the list
235 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
236 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
237 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
239 int phy_unregister_fixup(const char *bus_id
, u32 phy_uid
, u32 phy_uid_mask
)
241 struct list_head
*pos
, *n
;
242 struct phy_fixup
*fixup
;
247 mutex_lock(&phy_fixup_lock
);
248 list_for_each_safe(pos
, n
, &phy_fixup_list
) {
249 fixup
= list_entry(pos
, struct phy_fixup
, list
);
251 if ((!strcmp(fixup
->bus_id
, bus_id
)) &&
252 ((fixup
->phy_uid
& phy_uid_mask
) ==
253 (phy_uid
& phy_uid_mask
))) {
254 list_del(&fixup
->list
);
260 mutex_unlock(&phy_fixup_lock
);
264 EXPORT_SYMBOL(phy_unregister_fixup
);
266 /* Unregisters a fixup of any PHY with the UID in phy_uid */
267 int phy_unregister_fixup_for_uid(u32 phy_uid
, u32 phy_uid_mask
)
269 return phy_unregister_fixup(PHY_ANY_ID
, phy_uid
, phy_uid_mask
);
271 EXPORT_SYMBOL(phy_unregister_fixup_for_uid
);
273 /* Unregisters a fixup of the PHY with id string bus_id */
274 int phy_unregister_fixup_for_id(const char *bus_id
)
276 return phy_unregister_fixup(bus_id
, PHY_ANY_UID
, 0xffffffff);
278 EXPORT_SYMBOL(phy_unregister_fixup_for_id
);
280 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
281 * Fixups can be set to match any in one or more fields.
283 static int phy_needs_fixup(struct phy_device
*phydev
, struct phy_fixup
*fixup
)
285 if (strcmp(fixup
->bus_id
, phydev_name(phydev
)) != 0)
286 if (strcmp(fixup
->bus_id
, PHY_ANY_ID
) != 0)
289 if ((fixup
->phy_uid
& fixup
->phy_uid_mask
) !=
290 (phydev
->phy_id
& fixup
->phy_uid_mask
))
291 if (fixup
->phy_uid
!= PHY_ANY_UID
)
297 /* Runs any matching fixups for this phydev */
298 static int phy_scan_fixups(struct phy_device
*phydev
)
300 struct phy_fixup
*fixup
;
302 mutex_lock(&phy_fixup_lock
);
303 list_for_each_entry(fixup
, &phy_fixup_list
, list
) {
304 if (phy_needs_fixup(phydev
, fixup
)) {
305 int err
= fixup
->run(phydev
);
308 mutex_unlock(&phy_fixup_lock
);
311 phydev
->has_fixups
= true;
314 mutex_unlock(&phy_fixup_lock
);
319 static int phy_bus_match(struct device
*dev
, struct device_driver
*drv
)
321 struct phy_device
*phydev
= to_phy_device(dev
);
322 struct phy_driver
*phydrv
= to_phy_driver(drv
);
323 const int num_ids
= ARRAY_SIZE(phydev
->c45_ids
.device_ids
);
326 if (!(phydrv
->mdiodrv
.flags
& MDIO_DEVICE_IS_PHY
))
329 if (phydrv
->match_phy_device
)
330 return phydrv
->match_phy_device(phydev
);
332 if (phydev
->is_c45
) {
333 for (i
= 1; i
< num_ids
; i
++) {
334 if (!(phydev
->c45_ids
.devices_in_package
& (1 << i
)))
337 if ((phydrv
->phy_id
& phydrv
->phy_id_mask
) ==
338 (phydev
->c45_ids
.device_ids
[i
] &
339 phydrv
->phy_id_mask
))
344 return (phydrv
->phy_id
& phydrv
->phy_id_mask
) ==
345 (phydev
->phy_id
& phydrv
->phy_id_mask
);
349 struct phy_device
*phy_device_create(struct mii_bus
*bus
, int addr
, int phy_id
,
351 struct phy_c45_device_ids
*c45_ids
)
353 struct phy_device
*dev
;
354 struct mdio_device
*mdiodev
;
356 /* We allocate the device, and initialize the default values */
357 dev
= kzalloc(sizeof(*dev
), GFP_KERNEL
);
359 return ERR_PTR(-ENOMEM
);
361 mdiodev
= &dev
->mdio
;
362 mdiodev
->dev
.release
= phy_device_release
;
363 mdiodev
->dev
.parent
= &bus
->dev
;
364 mdiodev
->dev
.bus
= &mdio_bus_type
;
366 mdiodev
->pm_ops
= MDIO_BUS_PHY_PM_OPS
;
367 mdiodev
->bus_match
= phy_bus_match
;
368 mdiodev
->addr
= addr
;
369 mdiodev
->flags
= MDIO_DEVICE_FLAG_PHY
;
370 mdiodev
->device_free
= phy_mdio_device_free
;
371 mdiodev
->device_remove
= phy_mdio_device_remove
;
378 dev
->interface
= PHY_INTERFACE_MODE_GMII
;
380 dev
->autoneg
= AUTONEG_ENABLE
;
382 dev
->is_c45
= is_c45
;
383 dev
->phy_id
= phy_id
;
385 dev
->c45_ids
= *c45_ids
;
386 dev
->irq
= bus
->irq
[addr
];
387 dev_set_name(&mdiodev
->dev
, PHY_ID_FMT
, bus
->id
, addr
);
389 dev
->state
= PHY_DOWN
;
391 mutex_init(&dev
->lock
);
392 INIT_DELAYED_WORK(&dev
->state_queue
, phy_state_machine
);
393 INIT_WORK(&dev
->phy_queue
, phy_change_work
);
395 /* Request the appropriate module unconditionally; don't
396 * bother trying to do so only if it isn't already loaded,
397 * because that gets complicated. A hotplug event would have
398 * done an unconditional modprobe anyway.
399 * We don't do normal hotplug because it won't work for MDIO
400 * -- because it relies on the device staying around for long
401 * enough for the driver to get loaded. With MDIO, the NIC
402 * driver will get bored and give up as soon as it finds that
403 * there's no driver _already_ loaded.
405 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT
, MDIO_ID_ARGS(phy_id
));
407 device_initialize(&mdiodev
->dev
);
411 EXPORT_SYMBOL(phy_device_create
);
413 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
414 * @bus: the target MII bus
415 * @addr: PHY address on the MII bus
416 * @dev_addr: MMD address in the PHY.
417 * @devices_in_package: where to store the devices in package information.
419 * Description: reads devices in package registers of a MMD at @dev_addr
420 * from PHY at @addr on @bus.
422 * Returns: 0 on success, -EIO on failure.
424 static int get_phy_c45_devs_in_pkg(struct mii_bus
*bus
, int addr
, int dev_addr
,
425 u32
*devices_in_package
)
427 int phy_reg
, reg_addr
;
429 reg_addr
= MII_ADDR_C45
| dev_addr
<< 16 | MDIO_DEVS2
;
430 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
433 *devices_in_package
= (phy_reg
& 0xffff) << 16;
435 reg_addr
= MII_ADDR_C45
| dev_addr
<< 16 | MDIO_DEVS1
;
436 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
439 *devices_in_package
|= (phy_reg
& 0xffff);
445 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
446 * @bus: the target MII bus
447 * @addr: PHY address on the MII bus
448 * @phy_id: where to store the ID retrieved.
449 * @c45_ids: where to store the c45 ID information.
451 * If the PHY devices-in-package appears to be valid, it and the
452 * corresponding identifiers are stored in @c45_ids, zero is stored
453 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
457 static int get_phy_c45_ids(struct mii_bus
*bus
, int addr
, u32
*phy_id
,
458 struct phy_c45_device_ids
*c45_ids
) {
461 const int num_ids
= ARRAY_SIZE(c45_ids
->device_ids
);
462 u32
*devs
= &c45_ids
->devices_in_package
;
464 /* Find first non-zero Devices In package. Device zero is reserved
465 * for 802.3 c45 complied PHYs, so don't probe it at first.
467 for (i
= 1; i
< num_ids
&& *devs
== 0; i
++) {
468 phy_reg
= get_phy_c45_devs_in_pkg(bus
, addr
, i
, devs
);
472 if ((*devs
& 0x1fffffff) == 0x1fffffff) {
473 /* If mostly Fs, there is no device there,
474 * then let's continue to probe more, as some
475 * 10G PHYs have zero Devices In package,
476 * e.g. Cortina CS4315/CS4340 PHY.
478 phy_reg
= get_phy_c45_devs_in_pkg(bus
, addr
, 0, devs
);
481 /* no device there, let's get out of here */
482 if ((*devs
& 0x1fffffff) == 0x1fffffff) {
483 *phy_id
= 0xffffffff;
491 /* Now probe Device Identifiers for each device present. */
492 for (i
= 1; i
< num_ids
; i
++) {
493 if (!(c45_ids
->devices_in_package
& (1 << i
)))
496 reg_addr
= MII_ADDR_C45
| i
<< 16 | MII_PHYSID1
;
497 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
500 c45_ids
->device_ids
[i
] = (phy_reg
& 0xffff) << 16;
502 reg_addr
= MII_ADDR_C45
| i
<< 16 | MII_PHYSID2
;
503 phy_reg
= mdiobus_read(bus
, addr
, reg_addr
);
506 c45_ids
->device_ids
[i
] |= (phy_reg
& 0xffff);
513 * get_phy_id - reads the specified addr for its ID.
514 * @bus: the target MII bus
515 * @addr: PHY address on the MII bus
516 * @phy_id: where to store the ID retrieved.
517 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
518 * @c45_ids: where to store the c45 ID information.
520 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
521 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
524 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
525 * its return value is in turn returned.
528 static int get_phy_id(struct mii_bus
*bus
, int addr
, u32
*phy_id
,
529 bool is_c45
, struct phy_c45_device_ids
*c45_ids
)
534 return get_phy_c45_ids(bus
, addr
, phy_id
, c45_ids
);
536 /* Grab the bits from PHYIR1, and put them in the upper half */
537 phy_reg
= mdiobus_read(bus
, addr
, MII_PHYSID1
);
541 *phy_id
= (phy_reg
& 0xffff) << 16;
543 /* Grab the bits from PHYIR2, and put them in the lower half */
544 phy_reg
= mdiobus_read(bus
, addr
, MII_PHYSID2
);
548 *phy_id
|= (phy_reg
& 0xffff);
554 * get_phy_device - reads the specified PHY device and returns its @phy_device
556 * @bus: the target MII bus
557 * @addr: PHY address on the MII bus
558 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
560 * Description: Reads the ID registers of the PHY at @addr on the
561 * @bus, then allocates and returns the phy_device to represent it.
563 struct phy_device
*get_phy_device(struct mii_bus
*bus
, int addr
, bool is_c45
)
565 struct phy_c45_device_ids c45_ids
= {0};
569 r
= get_phy_id(bus
, addr
, &phy_id
, is_c45
, &c45_ids
);
573 /* If the phy_id is mostly Fs, there is no device there */
574 if ((phy_id
& 0x1fffffff) == 0x1fffffff)
575 return ERR_PTR(-ENODEV
);
577 return phy_device_create(bus
, addr
, phy_id
, is_c45
, &c45_ids
);
579 EXPORT_SYMBOL(get_phy_device
);
582 phy_id_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
584 struct phy_device
*phydev
= to_phy_device(dev
);
586 return sprintf(buf
, "0x%.8lx\n", (unsigned long)phydev
->phy_id
);
588 static DEVICE_ATTR_RO(phy_id
);
591 phy_interface_show(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
593 struct phy_device
*phydev
= to_phy_device(dev
);
594 const char *mode
= NULL
;
596 if (phy_is_internal(phydev
))
599 mode
= phy_modes(phydev
->interface
);
601 return sprintf(buf
, "%s\n", mode
);
603 static DEVICE_ATTR_RO(phy_interface
);
606 phy_has_fixups_show(struct device
*dev
, struct device_attribute
*attr
,
609 struct phy_device
*phydev
= to_phy_device(dev
);
611 return sprintf(buf
, "%d\n", phydev
->has_fixups
);
613 static DEVICE_ATTR_RO(phy_has_fixups
);
615 static struct attribute
*phy_dev_attrs
[] = {
616 &dev_attr_phy_id
.attr
,
617 &dev_attr_phy_interface
.attr
,
618 &dev_attr_phy_has_fixups
.attr
,
621 ATTRIBUTE_GROUPS(phy_dev
);
624 * phy_device_register - Register the phy device on the MDIO bus
625 * @phydev: phy_device structure to be added to the MDIO bus
627 int phy_device_register(struct phy_device
*phydev
)
631 err
= mdiobus_register_device(&phydev
->mdio
);
635 /* Deassert the reset signal */
636 phy_device_reset(phydev
, 0);
638 /* Run all of the fixups for this PHY */
639 err
= phy_scan_fixups(phydev
);
641 pr_err("PHY %d failed to initialize\n", phydev
->mdio
.addr
);
645 phydev
->mdio
.dev
.groups
= phy_dev_groups
;
647 err
= device_add(&phydev
->mdio
.dev
);
649 pr_err("PHY %d failed to add\n", phydev
->mdio
.addr
);
656 /* Assert the reset signal */
657 phy_device_reset(phydev
, 1);
659 mdiobus_unregister_device(&phydev
->mdio
);
662 EXPORT_SYMBOL(phy_device_register
);
665 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
666 * @phydev: phy_device structure to remove
668 * This doesn't free the phy_device itself, it merely reverses the effects
669 * of phy_device_register(). Use phy_device_free() to free the device
670 * after calling this function.
672 void phy_device_remove(struct phy_device
*phydev
)
674 device_del(&phydev
->mdio
.dev
);
676 /* Assert the reset signal */
677 phy_device_reset(phydev
, 1);
679 mdiobus_unregister_device(&phydev
->mdio
);
681 EXPORT_SYMBOL(phy_device_remove
);
684 * phy_find_first - finds the first PHY device on the bus
685 * @bus: the target MII bus
687 struct phy_device
*phy_find_first(struct mii_bus
*bus
)
689 struct phy_device
*phydev
;
692 for (addr
= 0; addr
< PHY_MAX_ADDR
; addr
++) {
693 phydev
= mdiobus_get_phy(bus
, addr
);
699 EXPORT_SYMBOL(phy_find_first
);
701 static void phy_link_change(struct phy_device
*phydev
, bool up
, bool do_carrier
)
703 struct net_device
*netdev
= phydev
->attached_dev
;
707 netif_carrier_on(netdev
);
709 netif_carrier_off(netdev
);
711 phydev
->adjust_link(netdev
);
715 * phy_prepare_link - prepares the PHY layer to monitor link status
716 * @phydev: target phy_device struct
717 * @handler: callback function for link status change notifications
719 * Description: Tells the PHY infrastructure to handle the
720 * gory details on monitoring link status (whether through
721 * polling or an interrupt), and to call back to the
722 * connected device driver when the link status changes.
723 * If you want to monitor your own link state, don't call
726 static void phy_prepare_link(struct phy_device
*phydev
,
727 void (*handler
)(struct net_device
*))
729 phydev
->adjust_link
= handler
;
733 * phy_connect_direct - connect an ethernet device to a specific phy_device
734 * @dev: the network device to connect
735 * @phydev: the pointer to the phy device
736 * @handler: callback function for state change notifications
737 * @interface: PHY device's interface
739 int phy_connect_direct(struct net_device
*dev
, struct phy_device
*phydev
,
740 void (*handler
)(struct net_device
*),
741 phy_interface_t interface
)
745 rc
= phy_attach_direct(dev
, phydev
, phydev
->dev_flags
, interface
);
749 phy_prepare_link(phydev
, handler
);
750 phy_start_machine(phydev
);
752 phy_start_interrupts(phydev
);
756 EXPORT_SYMBOL(phy_connect_direct
);
759 * phy_connect - connect an ethernet device to a PHY device
760 * @dev: the network device to connect
761 * @bus_id: the id string of the PHY device to connect
762 * @handler: callback function for state change notifications
763 * @interface: PHY device's interface
765 * Description: Convenience function for connecting ethernet
766 * devices to PHY devices. The default behavior is for
767 * the PHY infrastructure to handle everything, and only notify
768 * the connected driver when the link status changes. If you
769 * don't want, or can't use the provided functionality, you may
770 * choose to call only the subset of functions which provide
771 * the desired functionality.
773 struct phy_device
*phy_connect(struct net_device
*dev
, const char *bus_id
,
774 void (*handler
)(struct net_device
*),
775 phy_interface_t interface
)
777 struct phy_device
*phydev
;
781 /* Search the list of PHY devices on the mdio bus for the
782 * PHY with the requested name
784 d
= bus_find_device_by_name(&mdio_bus_type
, NULL
, bus_id
);
786 pr_err("PHY %s not found\n", bus_id
);
787 return ERR_PTR(-ENODEV
);
789 phydev
= to_phy_device(d
);
791 rc
= phy_connect_direct(dev
, phydev
, handler
, interface
);
798 EXPORT_SYMBOL(phy_connect
);
801 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
803 * @phydev: target phy_device struct
805 void phy_disconnect(struct phy_device
*phydev
)
808 phy_stop_interrupts(phydev
);
810 phy_stop_machine(phydev
);
812 phydev
->adjust_link
= NULL
;
816 EXPORT_SYMBOL(phy_disconnect
);
819 * phy_poll_reset - Safely wait until a PHY reset has properly completed
820 * @phydev: The PHY device to poll
822 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
823 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
824 * register must be polled until the BMCR_RESET bit clears.
826 * Furthermore, any attempts to write to PHY registers may have no effect
827 * or even generate MDIO bus errors until this is complete.
829 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
830 * standard and do not fully reset after the BMCR_RESET bit is set, and may
831 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
832 * effort to support such broken PHYs, this function is separate from the
833 * standard phy_init_hw() which will zero all the other bits in the BMCR
834 * and reapply all driver-specific and board-specific fixups.
836 static int phy_poll_reset(struct phy_device
*phydev
)
838 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
839 unsigned int retries
= 12;
844 ret
= phy_read(phydev
, MII_BMCR
);
847 } while (ret
& BMCR_RESET
&& --retries
);
848 if (ret
& BMCR_RESET
)
851 /* Some chips (smsc911x) may still need up to another 1ms after the
852 * BMCR_RESET bit is cleared before they are usable.
858 int phy_init_hw(struct phy_device
*phydev
)
862 /* Deassert the reset signal */
863 phy_device_reset(phydev
, 0);
865 if (!phydev
->drv
|| !phydev
->drv
->config_init
)
868 if (phydev
->drv
->soft_reset
)
869 ret
= phydev
->drv
->soft_reset(phydev
);
871 ret
= genphy_soft_reset(phydev
);
876 ret
= phy_scan_fixups(phydev
);
880 return phydev
->drv
->config_init(phydev
);
882 EXPORT_SYMBOL(phy_init_hw
);
884 void phy_attached_info(struct phy_device
*phydev
)
886 phy_attached_print(phydev
, NULL
);
888 EXPORT_SYMBOL(phy_attached_info
);
890 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
891 void phy_attached_print(struct phy_device
*phydev
, const char *fmt
, ...)
893 const char *drv_name
= phydev
->drv
? phydev
->drv
->name
: "unbound";
897 switch(phydev
->irq
) {
901 case PHY_IGNORE_INTERRUPT
:
905 snprintf(irq_num
, sizeof(irq_num
), "%d", phydev
->irq
);
912 dev_info(&phydev
->mdio
.dev
, ATTACHED_FMT
"\n",
913 drv_name
, phydev_name(phydev
),
918 dev_info(&phydev
->mdio
.dev
, ATTACHED_FMT
,
919 drv_name
, phydev_name(phydev
),
927 EXPORT_SYMBOL(phy_attached_print
);
930 * phy_attach_direct - attach a network device to a given PHY device pointer
931 * @dev: network device to attach
932 * @phydev: Pointer to phy_device to attach
933 * @flags: PHY device's dev_flags
934 * @interface: PHY device's interface
936 * Description: Called by drivers to attach to a particular PHY
937 * device. The phy_device is found, and properly hooked up
938 * to the phy_driver. If no driver is attached, then a
939 * generic driver is used. The phy_device is given a ptr to
940 * the attaching device, and given a callback for link status
941 * change. The phy_device is returned to the attaching driver.
942 * This function takes a reference on the phy device.
944 int phy_attach_direct(struct net_device
*dev
, struct phy_device
*phydev
,
945 u32 flags
, phy_interface_t interface
)
947 struct module
*ndev_owner
= dev
->dev
.parent
->driver
->owner
;
948 struct mii_bus
*bus
= phydev
->mdio
.bus
;
949 struct device
*d
= &phydev
->mdio
.dev
;
950 bool using_genphy
= false;
953 /* For Ethernet device drivers that register their own MDIO bus, we
954 * will have bus->owner match ndev_mod, so we do not want to increment
955 * our own module->refcnt here, otherwise we would not be able to
958 if (ndev_owner
!= bus
->owner
&& !try_module_get(bus
->owner
)) {
959 dev_err(&dev
->dev
, "failed to get the bus module\n");
965 /* Assume that if there is no driver, that it doesn't
966 * exist, and we should use the genphy driver.
970 d
->driver
= &genphy_10g_driver
.mdiodrv
.driver
;
972 d
->driver
= &genphy_driver
.mdiodrv
.driver
;
977 if (!try_module_get(d
->driver
->owner
)) {
978 dev_err(&dev
->dev
, "failed to get the device driver module\n");
980 goto error_put_device
;
984 err
= d
->driver
->probe(d
);
986 err
= device_bind_driver(d
);
989 goto error_module_put
;
992 if (phydev
->attached_dev
) {
993 dev_err(&dev
->dev
, "PHY already attached\n");
998 phydev
->phy_link_change
= phy_link_change
;
999 phydev
->attached_dev
= dev
;
1000 dev
->phydev
= phydev
;
1002 /* Some Ethernet drivers try to connect to a PHY device before
1003 * calling register_netdevice() -> netdev_register_kobject() and
1004 * does the dev->dev.kobj initialization. Here we only check for
1005 * success which indicates that the network device kobject is
1006 * ready. Once we do that we still need to keep track of whether
1007 * links were successfully set up or not for phy_detach() to
1008 * remove them accordingly.
1010 phydev
->sysfs_links
= false;
1012 err
= sysfs_create_link(&phydev
->mdio
.dev
.kobj
, &dev
->dev
.kobj
,
1015 err
= sysfs_create_link(&dev
->dev
.kobj
, &phydev
->mdio
.dev
.kobj
,
1020 phydev
->sysfs_links
= true;
1023 phydev
->dev_flags
= flags
;
1025 phydev
->interface
= interface
;
1027 phydev
->state
= PHY_READY
;
1029 /* Initial carrier state is off as the phy is about to be
1032 netif_carrier_off(phydev
->attached_dev
);
1034 /* Do initial configuration here, now that
1035 * we have certain key parameters
1036 * (dev_flags and interface)
1038 err
= phy_init_hw(phydev
);
1043 phy_led_triggers_register(phydev
);
1048 /* phy_detach() does all of the cleanup below */
1053 module_put(d
->driver
->owner
);
1056 if (ndev_owner
!= bus
->owner
)
1057 module_put(bus
->owner
);
1060 EXPORT_SYMBOL(phy_attach_direct
);
1063 * phy_attach - attach a network device to a particular PHY device
1064 * @dev: network device to attach
1065 * @bus_id: Bus ID of PHY device to attach
1066 * @interface: PHY device's interface
1068 * Description: Same as phy_attach_direct() except that a PHY bus_id
1069 * string is passed instead of a pointer to a struct phy_device.
1071 struct phy_device
*phy_attach(struct net_device
*dev
, const char *bus_id
,
1072 phy_interface_t interface
)
1074 struct bus_type
*bus
= &mdio_bus_type
;
1075 struct phy_device
*phydev
;
1079 /* Search the list of PHY devices on the mdio bus for the
1080 * PHY with the requested name
1082 d
= bus_find_device_by_name(bus
, NULL
, bus_id
);
1084 pr_err("PHY %s not found\n", bus_id
);
1085 return ERR_PTR(-ENODEV
);
1087 phydev
= to_phy_device(d
);
1089 rc
= phy_attach_direct(dev
, phydev
, phydev
->dev_flags
, interface
);
1096 EXPORT_SYMBOL(phy_attach
);
1099 * phy_detach - detach a PHY device from its network device
1100 * @phydev: target phy_device struct
1102 * This detaches the phy device from its network device and the phy
1103 * driver, and drops the reference count taken in phy_attach_direct().
1105 void phy_detach(struct phy_device
*phydev
)
1107 struct net_device
*dev
= phydev
->attached_dev
;
1108 struct module
*ndev_owner
= dev
->dev
.parent
->driver
->owner
;
1109 struct mii_bus
*bus
;
1111 if (phydev
->sysfs_links
) {
1112 sysfs_remove_link(&dev
->dev
.kobj
, "phydev");
1113 sysfs_remove_link(&phydev
->mdio
.dev
.kobj
, "attached_dev");
1115 phydev
->attached_dev
->phydev
= NULL
;
1116 phydev
->attached_dev
= NULL
;
1117 phy_suspend(phydev
);
1118 phydev
->phylink
= NULL
;
1120 phy_led_triggers_unregister(phydev
);
1122 module_put(phydev
->mdio
.dev
.driver
->owner
);
1124 /* If the device had no specific driver before (i.e. - it
1125 * was using the generic driver), we unbind the device
1126 * from the generic driver so that there's a chance a
1127 * real driver could be loaded
1129 if (phydev
->mdio
.dev
.driver
== &genphy_10g_driver
.mdiodrv
.driver
||
1130 phydev
->mdio
.dev
.driver
== &genphy_driver
.mdiodrv
.driver
)
1131 device_release_driver(&phydev
->mdio
.dev
);
1134 * The phydev might go away on the put_device() below, so avoid
1135 * a use-after-free bug by reading the underlying bus first.
1137 bus
= phydev
->mdio
.bus
;
1139 put_device(&phydev
->mdio
.dev
);
1140 if (ndev_owner
!= bus
->owner
)
1141 module_put(bus
->owner
);
1143 /* Assert the reset signal */
1144 phy_device_reset(phydev
, 1);
1146 EXPORT_SYMBOL(phy_detach
);
1148 int phy_suspend(struct phy_device
*phydev
)
1150 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1151 struct ethtool_wolinfo wol
= { .cmd
= ETHTOOL_GWOL
};
1154 /* If the device has WOL enabled, we cannot suspend the PHY */
1155 phy_ethtool_get_wol(phydev
, &wol
);
1159 if (phydev
->drv
&& phydrv
->suspend
)
1160 ret
= phydrv
->suspend(phydev
);
1165 phydev
->suspended
= true;
1169 EXPORT_SYMBOL(phy_suspend
);
1171 int __phy_resume(struct phy_device
*phydev
)
1173 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1176 WARN_ON(!mutex_is_locked(&phydev
->lock
));
1178 if (phydev
->drv
&& phydrv
->resume
)
1179 ret
= phydrv
->resume(phydev
);
1184 phydev
->suspended
= false;
1188 EXPORT_SYMBOL(__phy_resume
);
1190 int phy_resume(struct phy_device
*phydev
)
1194 mutex_lock(&phydev
->lock
);
1195 ret
= __phy_resume(phydev
);
1196 mutex_unlock(&phydev
->lock
);
1200 EXPORT_SYMBOL(phy_resume
);
1202 int phy_loopback(struct phy_device
*phydev
, bool enable
)
1204 struct phy_driver
*phydrv
= to_phy_driver(phydev
->mdio
.dev
.driver
);
1207 mutex_lock(&phydev
->lock
);
1209 if (enable
&& phydev
->loopback_enabled
) {
1214 if (!enable
&& !phydev
->loopback_enabled
) {
1219 if (phydev
->drv
&& phydrv
->set_loopback
)
1220 ret
= phydrv
->set_loopback(phydev
, enable
);
1227 phydev
->loopback_enabled
= enable
;
1230 mutex_unlock(&phydev
->lock
);
1233 EXPORT_SYMBOL(phy_loopback
);
1236 * phy_reset_after_clk_enable - perform a PHY reset if needed
1237 * @phydev: target phy_device struct
1239 * Description: Some PHYs are known to need a reset after their refclk was
1240 * enabled. This function evaluates the flags and perform the reset if it's
1241 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1244 int phy_reset_after_clk_enable(struct phy_device
*phydev
)
1246 if (!phydev
|| !phydev
->drv
)
1249 if (phydev
->drv
->flags
& PHY_RST_AFTER_CLK_EN
) {
1250 phy_device_reset(phydev
, 1);
1251 phy_device_reset(phydev
, 0);
1257 EXPORT_SYMBOL(phy_reset_after_clk_enable
);
1259 /* Generic PHY support and helper functions */
1262 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1263 * @phydev: target phy_device struct
1265 * Description: Writes MII_ADVERTISE with the appropriate values,
1266 * after sanitizing the values to make sure we only advertise
1267 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1268 * hasn't changed, and > 0 if it has changed.
1270 static int genphy_config_advert(struct phy_device
*phydev
)
1273 int oldadv
, adv
, bmsr
;
1274 int err
, changed
= 0;
1276 /* Only allow advertising what this PHY supports */
1277 phydev
->advertising
&= phydev
->supported
;
1278 advertise
= phydev
->advertising
;
1280 /* Setup standard advertisement */
1281 adv
= phy_read(phydev
, MII_ADVERTISE
);
1286 adv
&= ~(ADVERTISE_ALL
| ADVERTISE_100BASE4
| ADVERTISE_PAUSE_CAP
|
1287 ADVERTISE_PAUSE_ASYM
);
1288 adv
|= ethtool_adv_to_mii_adv_t(advertise
);
1290 if (adv
!= oldadv
) {
1291 err
= phy_write(phydev
, MII_ADVERTISE
, adv
);
1298 bmsr
= phy_read(phydev
, MII_BMSR
);
1302 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1303 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1306 if (!(bmsr
& BMSR_ESTATEN
))
1309 /* Configure gigabit if it's supported */
1310 adv
= phy_read(phydev
, MII_CTRL1000
);
1315 adv
&= ~(ADVERTISE_1000FULL
| ADVERTISE_1000HALF
);
1317 if (phydev
->supported
& (SUPPORTED_1000baseT_Half
|
1318 SUPPORTED_1000baseT_Full
)) {
1319 adv
|= ethtool_adv_to_mii_ctrl1000_t(advertise
);
1325 err
= phy_write(phydev
, MII_CTRL1000
, adv
);
1333 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1334 * @phydev: target phy_device struct
1336 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1337 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1338 * changed, and 1 if it has changed.
1340 static int genphy_config_eee_advert(struct phy_device
*phydev
)
1342 int broken
= phydev
->eee_broken_modes
;
1345 /* Nothing to disable */
1349 /* If the following call fails, we assume that EEE is not
1350 * supported by the phy. If we read 0, EEE is not advertised
1351 * In both case, we don't need to continue
1353 adv
= phy_read_mmd(phydev
, MDIO_MMD_AN
, MDIO_AN_EEE_ADV
);
1360 /* Advertising remains unchanged with the broken mask */
1364 phy_write_mmd(phydev
, MDIO_MMD_AN
, MDIO_AN_EEE_ADV
, adv
);
1370 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1371 * @phydev: target phy_device struct
1373 * Description: Configures MII_BMCR to force speed/duplex
1374 * to the values in phydev. Assumes that the values are valid.
1375 * Please see phy_sanitize_settings().
1377 int genphy_setup_forced(struct phy_device
*phydev
)
1382 phydev
->asym_pause
= 0;
1384 if (SPEED_1000
== phydev
->speed
)
1385 ctl
|= BMCR_SPEED1000
;
1386 else if (SPEED_100
== phydev
->speed
)
1387 ctl
|= BMCR_SPEED100
;
1389 if (DUPLEX_FULL
== phydev
->duplex
)
1390 ctl
|= BMCR_FULLDPLX
;
1392 return phy_modify(phydev
, MII_BMCR
,
1393 ~(BMCR_LOOPBACK
| BMCR_ISOLATE
| BMCR_PDOWN
), ctl
);
1395 EXPORT_SYMBOL(genphy_setup_forced
);
1398 * genphy_restart_aneg - Enable and Restart Autonegotiation
1399 * @phydev: target phy_device struct
1401 int genphy_restart_aneg(struct phy_device
*phydev
)
1403 /* Don't isolate the PHY if we're negotiating */
1404 return phy_modify(phydev
, MII_BMCR
, BMCR_ISOLATE
,
1405 BMCR_ANENABLE
| BMCR_ANRESTART
);
1407 EXPORT_SYMBOL(genphy_restart_aneg
);
1410 * genphy_config_aneg - restart auto-negotiation or write BMCR
1411 * @phydev: target phy_device struct
1413 * Description: If auto-negotiation is enabled, we configure the
1414 * advertising, and then restart auto-negotiation. If it is not
1415 * enabled, then we write the BMCR.
1417 int genphy_config_aneg(struct phy_device
*phydev
)
1421 changed
= genphy_config_eee_advert(phydev
);
1423 if (AUTONEG_ENABLE
!= phydev
->autoneg
)
1424 return genphy_setup_forced(phydev
);
1426 err
= genphy_config_advert(phydev
);
1427 if (err
< 0) /* error */
1433 /* Advertisement hasn't changed, but maybe aneg was never on to
1434 * begin with? Or maybe phy was isolated?
1436 int ctl
= phy_read(phydev
, MII_BMCR
);
1441 if (!(ctl
& BMCR_ANENABLE
) || (ctl
& BMCR_ISOLATE
))
1442 changed
= 1; /* do restart aneg */
1445 /* Only restart aneg if we are advertising something different
1446 * than we were before.
1449 return genphy_restart_aneg(phydev
);
1453 EXPORT_SYMBOL(genphy_config_aneg
);
1456 * genphy_aneg_done - return auto-negotiation status
1457 * @phydev: target phy_device struct
1459 * Description: Reads the status register and returns 0 either if
1460 * auto-negotiation is incomplete, or if there was an error.
1461 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1463 int genphy_aneg_done(struct phy_device
*phydev
)
1465 int retval
= phy_read(phydev
, MII_BMSR
);
1467 return (retval
< 0) ? retval
: (retval
& BMSR_ANEGCOMPLETE
);
1469 EXPORT_SYMBOL(genphy_aneg_done
);
1472 * genphy_update_link - update link status in @phydev
1473 * @phydev: target phy_device struct
1475 * Description: Update the value in phydev->link to reflect the
1476 * current link value. In order to do this, we need to read
1477 * the status register twice, keeping the second value.
1479 int genphy_update_link(struct phy_device
*phydev
)
1483 /* Do a fake read */
1484 status
= phy_read(phydev
, MII_BMSR
);
1488 /* Read link and autonegotiation status */
1489 status
= phy_read(phydev
, MII_BMSR
);
1493 if ((status
& BMSR_LSTATUS
) == 0)
1500 EXPORT_SYMBOL(genphy_update_link
);
1503 * genphy_read_status - check the link status and update current link state
1504 * @phydev: target phy_device struct
1506 * Description: Check the link, then figure out the current state
1507 * by comparing what we advertise with what the link partner
1508 * advertises. Start by checking the gigabit possibilities,
1509 * then move on to 10/100.
1511 int genphy_read_status(struct phy_device
*phydev
)
1518 int common_adv_gb
= 0;
1520 /* Update the link, but return if there was an error */
1521 err
= genphy_update_link(phydev
);
1525 phydev
->lp_advertising
= 0;
1527 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
1528 if (phydev
->supported
& (SUPPORTED_1000baseT_Half
1529 | SUPPORTED_1000baseT_Full
)) {
1530 lpagb
= phy_read(phydev
, MII_STAT1000
);
1534 adv
= phy_read(phydev
, MII_CTRL1000
);
1538 phydev
->lp_advertising
=
1539 mii_stat1000_to_ethtool_lpa_t(lpagb
);
1540 common_adv_gb
= lpagb
& adv
<< 2;
1543 lpa
= phy_read(phydev
, MII_LPA
);
1547 phydev
->lp_advertising
|= mii_lpa_to_ethtool_lpa_t(lpa
);
1549 adv
= phy_read(phydev
, MII_ADVERTISE
);
1553 common_adv
= lpa
& adv
;
1555 phydev
->speed
= SPEED_10
;
1556 phydev
->duplex
= DUPLEX_HALF
;
1558 phydev
->asym_pause
= 0;
1560 if (common_adv_gb
& (LPA_1000FULL
| LPA_1000HALF
)) {
1561 phydev
->speed
= SPEED_1000
;
1563 if (common_adv_gb
& LPA_1000FULL
)
1564 phydev
->duplex
= DUPLEX_FULL
;
1565 } else if (common_adv
& (LPA_100FULL
| LPA_100HALF
)) {
1566 phydev
->speed
= SPEED_100
;
1568 if (common_adv
& LPA_100FULL
)
1569 phydev
->duplex
= DUPLEX_FULL
;
1571 if (common_adv
& LPA_10FULL
)
1572 phydev
->duplex
= DUPLEX_FULL
;
1574 if (phydev
->duplex
== DUPLEX_FULL
) {
1575 phydev
->pause
= lpa
& LPA_PAUSE_CAP
? 1 : 0;
1576 phydev
->asym_pause
= lpa
& LPA_PAUSE_ASYM
? 1 : 0;
1579 int bmcr
= phy_read(phydev
, MII_BMCR
);
1584 if (bmcr
& BMCR_FULLDPLX
)
1585 phydev
->duplex
= DUPLEX_FULL
;
1587 phydev
->duplex
= DUPLEX_HALF
;
1589 if (bmcr
& BMCR_SPEED1000
)
1590 phydev
->speed
= SPEED_1000
;
1591 else if (bmcr
& BMCR_SPEED100
)
1592 phydev
->speed
= SPEED_100
;
1594 phydev
->speed
= SPEED_10
;
1597 phydev
->asym_pause
= 0;
1602 EXPORT_SYMBOL(genphy_read_status
);
1605 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
1606 * @phydev: target phy_device struct
1608 * Description: Perform a software PHY reset using the standard
1609 * BMCR_RESET bit and poll for the reset bit to be cleared.
1611 * Returns: 0 on success, < 0 on failure
1613 int genphy_soft_reset(struct phy_device
*phydev
)
1617 ret
= phy_write(phydev
, MII_BMCR
, BMCR_RESET
);
1621 return phy_poll_reset(phydev
);
1623 EXPORT_SYMBOL(genphy_soft_reset
);
1625 int genphy_config_init(struct phy_device
*phydev
)
1630 features
= (SUPPORTED_TP
| SUPPORTED_MII
1631 | SUPPORTED_AUI
| SUPPORTED_FIBRE
|
1632 SUPPORTED_BNC
| SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1634 /* Do we support autonegotiation? */
1635 val
= phy_read(phydev
, MII_BMSR
);
1639 if (val
& BMSR_ANEGCAPABLE
)
1640 features
|= SUPPORTED_Autoneg
;
1642 if (val
& BMSR_100FULL
)
1643 features
|= SUPPORTED_100baseT_Full
;
1644 if (val
& BMSR_100HALF
)
1645 features
|= SUPPORTED_100baseT_Half
;
1646 if (val
& BMSR_10FULL
)
1647 features
|= SUPPORTED_10baseT_Full
;
1648 if (val
& BMSR_10HALF
)
1649 features
|= SUPPORTED_10baseT_Half
;
1651 if (val
& BMSR_ESTATEN
) {
1652 val
= phy_read(phydev
, MII_ESTATUS
);
1656 if (val
& ESTATUS_1000_TFULL
)
1657 features
|= SUPPORTED_1000baseT_Full
;
1658 if (val
& ESTATUS_1000_THALF
)
1659 features
|= SUPPORTED_1000baseT_Half
;
1662 phydev
->supported
&= features
;
1663 phydev
->advertising
&= features
;
1667 EXPORT_SYMBOL(genphy_config_init
);
1669 int genphy_suspend(struct phy_device
*phydev
)
1671 return phy_set_bits(phydev
, MII_BMCR
, BMCR_PDOWN
);
1673 EXPORT_SYMBOL(genphy_suspend
);
1675 int genphy_resume(struct phy_device
*phydev
)
1677 return phy_clear_bits(phydev
, MII_BMCR
, BMCR_PDOWN
);
1679 EXPORT_SYMBOL(genphy_resume
);
1681 int genphy_loopback(struct phy_device
*phydev
, bool enable
)
1683 return phy_modify(phydev
, MII_BMCR
, BMCR_LOOPBACK
,
1684 enable
? BMCR_LOOPBACK
: 0);
1686 EXPORT_SYMBOL(genphy_loopback
);
1688 static int __set_phy_supported(struct phy_device
*phydev
, u32 max_speed
)
1690 /* The default values for phydev->supported are provided by the PHY
1691 * driver "features" member, we want to reset to sane defaults first
1692 * before supporting higher speeds.
1694 phydev
->supported
&= PHY_DEFAULT_FEATURES
;
1696 switch (max_speed
) {
1700 phydev
->supported
|= PHY_1000BT_FEATURES
;
1703 phydev
->supported
|= PHY_100BT_FEATURES
;
1706 phydev
->supported
|= PHY_10BT_FEATURES
;
1712 int phy_set_max_speed(struct phy_device
*phydev
, u32 max_speed
)
1716 err
= __set_phy_supported(phydev
, max_speed
);
1720 phydev
->advertising
= phydev
->supported
;
1724 EXPORT_SYMBOL(phy_set_max_speed
);
1726 static void of_set_phy_supported(struct phy_device
*phydev
)
1728 struct device_node
*node
= phydev
->mdio
.dev
.of_node
;
1731 if (!IS_ENABLED(CONFIG_OF_MDIO
))
1737 if (!of_property_read_u32(node
, "max-speed", &max_speed
))
1738 __set_phy_supported(phydev
, max_speed
);
1741 static void of_set_phy_eee_broken(struct phy_device
*phydev
)
1743 struct device_node
*node
= phydev
->mdio
.dev
.of_node
;
1746 if (!IS_ENABLED(CONFIG_OF_MDIO
))
1752 if (of_property_read_bool(node
, "eee-broken-100tx"))
1753 broken
|= MDIO_EEE_100TX
;
1754 if (of_property_read_bool(node
, "eee-broken-1000t"))
1755 broken
|= MDIO_EEE_1000T
;
1756 if (of_property_read_bool(node
, "eee-broken-10gt"))
1757 broken
|= MDIO_EEE_10GT
;
1758 if (of_property_read_bool(node
, "eee-broken-1000kx"))
1759 broken
|= MDIO_EEE_1000KX
;
1760 if (of_property_read_bool(node
, "eee-broken-10gkx4"))
1761 broken
|= MDIO_EEE_10GKX4
;
1762 if (of_property_read_bool(node
, "eee-broken-10gkr"))
1763 broken
|= MDIO_EEE_10GKR
;
1765 phydev
->eee_broken_modes
= broken
;
1769 * phy_probe - probe and init a PHY device
1770 * @dev: device to probe and init
1772 * Description: Take care of setting up the phy_device structure,
1773 * set the state to READY (the driver's init function should
1774 * set it to STARTING if needed).
1776 static int phy_probe(struct device
*dev
)
1778 struct phy_device
*phydev
= to_phy_device(dev
);
1779 struct device_driver
*drv
= phydev
->mdio
.dev
.driver
;
1780 struct phy_driver
*phydrv
= to_phy_driver(drv
);
1783 phydev
->drv
= phydrv
;
1785 /* Disable the interrupt if the PHY doesn't support it
1786 * but the interrupt is still a valid one
1788 if (!(phydrv
->flags
& PHY_HAS_INTERRUPT
) &&
1789 phy_interrupt_is_valid(phydev
))
1790 phydev
->irq
= PHY_POLL
;
1792 if (phydrv
->flags
& PHY_IS_INTERNAL
)
1793 phydev
->is_internal
= true;
1795 mutex_lock(&phydev
->lock
);
1797 /* Start out supporting everything. Eventually,
1798 * a controller will attach, and may modify one
1799 * or both of these values
1801 phydev
->supported
= phydrv
->features
;
1802 of_set_phy_supported(phydev
);
1803 phydev
->advertising
= phydev
->supported
;
1805 /* Get the EEE modes we want to prohibit. We will ask
1806 * the PHY stop advertising these mode later on
1808 of_set_phy_eee_broken(phydev
);
1810 /* The Pause Frame bits indicate that the PHY can support passing
1811 * pause frames. During autonegotiation, the PHYs will determine if
1812 * they should allow pause frames to pass. The MAC driver should then
1813 * use that result to determine whether to enable flow control via
1816 * Normally, PHY drivers should not set the Pause bits, and instead
1817 * allow phylib to do that. However, there may be some situations
1818 * (e.g. hardware erratum) where the driver wants to set only one
1821 if (phydrv
->features
& (SUPPORTED_Pause
| SUPPORTED_Asym_Pause
)) {
1822 phydev
->supported
&= ~(SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1823 phydev
->supported
|= phydrv
->features
&
1824 (SUPPORTED_Pause
| SUPPORTED_Asym_Pause
);
1826 phydev
->supported
|= SUPPORTED_Pause
| SUPPORTED_Asym_Pause
;
1829 /* Set the state to READY by default */
1830 phydev
->state
= PHY_READY
;
1832 if (phydev
->drv
->probe
) {
1833 /* Deassert the reset signal */
1834 phy_device_reset(phydev
, 0);
1836 err
= phydev
->drv
->probe(phydev
);
1838 /* Assert the reset signal */
1839 phy_device_reset(phydev
, 1);
1843 mutex_unlock(&phydev
->lock
);
1848 static int phy_remove(struct device
*dev
)
1850 struct phy_device
*phydev
= to_phy_device(dev
);
1852 cancel_delayed_work_sync(&phydev
->state_queue
);
1854 mutex_lock(&phydev
->lock
);
1855 phydev
->state
= PHY_DOWN
;
1856 mutex_unlock(&phydev
->lock
);
1858 if (phydev
->drv
&& phydev
->drv
->remove
) {
1859 phydev
->drv
->remove(phydev
);
1861 /* Assert the reset signal */
1862 phy_device_reset(phydev
, 1);
1870 * phy_driver_register - register a phy_driver with the PHY layer
1871 * @new_driver: new phy_driver to register
1872 * @owner: module owning this PHY
1874 int phy_driver_register(struct phy_driver
*new_driver
, struct module
*owner
)
1878 new_driver
->mdiodrv
.flags
|= MDIO_DEVICE_IS_PHY
;
1879 new_driver
->mdiodrv
.driver
.name
= new_driver
->name
;
1880 new_driver
->mdiodrv
.driver
.bus
= &mdio_bus_type
;
1881 new_driver
->mdiodrv
.driver
.probe
= phy_probe
;
1882 new_driver
->mdiodrv
.driver
.remove
= phy_remove
;
1883 new_driver
->mdiodrv
.driver
.owner
= owner
;
1885 retval
= driver_register(&new_driver
->mdiodrv
.driver
);
1887 pr_err("%s: Error %d in registering driver\n",
1888 new_driver
->name
, retval
);
1893 pr_debug("%s: Registered new driver\n", new_driver
->name
);
1897 EXPORT_SYMBOL(phy_driver_register
);
1899 int phy_drivers_register(struct phy_driver
*new_driver
, int n
,
1900 struct module
*owner
)
1904 for (i
= 0; i
< n
; i
++) {
1905 ret
= phy_driver_register(new_driver
+ i
, owner
);
1908 phy_driver_unregister(new_driver
+ i
);
1914 EXPORT_SYMBOL(phy_drivers_register
);
1916 void phy_driver_unregister(struct phy_driver
*drv
)
1918 driver_unregister(&drv
->mdiodrv
.driver
);
1920 EXPORT_SYMBOL(phy_driver_unregister
);
1922 void phy_drivers_unregister(struct phy_driver
*drv
, int n
)
1926 for (i
= 0; i
< n
; i
++)
1927 phy_driver_unregister(drv
+ i
);
1929 EXPORT_SYMBOL(phy_drivers_unregister
);
1931 static struct phy_driver genphy_driver
= {
1932 .phy_id
= 0xffffffff,
1933 .phy_id_mask
= 0xffffffff,
1934 .name
= "Generic PHY",
1935 .soft_reset
= genphy_no_soft_reset
,
1936 .config_init
= genphy_config_init
,
1937 .features
= PHY_GBIT_FEATURES
| SUPPORTED_MII
|
1938 SUPPORTED_AUI
| SUPPORTED_FIBRE
|
1940 .aneg_done
= genphy_aneg_done
,
1941 .suspend
= genphy_suspend
,
1942 .resume
= genphy_resume
,
1943 .set_loopback
= genphy_loopback
,
1946 static int __init
phy_init(void)
1950 rc
= mdio_bus_init();
1954 rc
= phy_driver_register(&genphy_10g_driver
, THIS_MODULE
);
1958 rc
= phy_driver_register(&genphy_driver
, THIS_MODULE
);
1960 phy_driver_unregister(&genphy_10g_driver
);
1968 static void __exit
phy_exit(void)
1970 phy_driver_unregister(&genphy_10g_driver
);
1971 phy_driver_unregister(&genphy_driver
);
1975 subsys_initcall(phy_init
);
1976 module_exit(phy_exit
);