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