2 * drivers/net/phy/phy.c
4 * Framework for configuring and reading PHY devices
5 * Based on code in sungem_phy.c and gianfar_phy.c
9 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 * Copyright (c) 2006 Maciej W. Rozycki
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/unistd.h>
22 #include <linux/slab.h>
23 #include <linux/interrupt.h>
24 #include <linux/init.h>
25 #include <linux/delay.h>
26 #include <linux/netdevice.h>
27 #include <linux/etherdevice.h>
28 #include <linux/skbuff.h>
29 #include <linux/spinlock.h>
31 #include <linux/module.h>
32 #include <linux/mii.h>
33 #include <linux/ethtool.h>
34 #include <linux/phy.h>
35 #include <linux/timer.h>
36 #include <linux/workqueue.h>
40 #include <asm/uaccess.h>
43 * phy_print_status - Convenience function to print out the current phy status
44 * @phydev: the phy_device struct
46 void phy_print_status(struct phy_device
*phydev
)
48 pr_info("PHY: %s - Link is %s", phydev
->dev
.bus_id
,
49 phydev
->link
? "Up" : "Down");
51 printk(" - %d/%s", phydev
->speed
,
52 DUPLEX_FULL
== phydev
->duplex
?
57 EXPORT_SYMBOL(phy_print_status
);
61 * phy_read - Convenience function for reading a given PHY register
62 * @phydev: the phy_device struct
63 * @regnum: register number to read
65 * NOTE: MUST NOT be called from interrupt context,
66 * because the bus read/write functions may wait for an interrupt
67 * to conclude the operation.
69 int phy_read(struct phy_device
*phydev
, u16 regnum
)
72 struct mii_bus
*bus
= phydev
->bus
;
74 spin_lock_bh(&bus
->mdio_lock
);
75 retval
= bus
->read(bus
, phydev
->addr
, regnum
);
76 spin_unlock_bh(&bus
->mdio_lock
);
80 EXPORT_SYMBOL(phy_read
);
83 * phy_write - Convenience function for writing a given PHY register
84 * @phydev: the phy_device struct
85 * @regnum: register number to write
86 * @val: value to write to @regnum
88 * NOTE: MUST NOT be called from interrupt context,
89 * because the bus read/write functions may wait for an interrupt
90 * to conclude the operation.
92 int phy_write(struct phy_device
*phydev
, u16 regnum
, u16 val
)
95 struct mii_bus
*bus
= phydev
->bus
;
97 spin_lock_bh(&bus
->mdio_lock
);
98 err
= bus
->write(bus
, phydev
->addr
, regnum
, val
);
99 spin_unlock_bh(&bus
->mdio_lock
);
103 EXPORT_SYMBOL(phy_write
);
106 * phy_clear_interrupt - Ack the phy device's interrupt
107 * @phydev: the phy_device struct
109 * If the @phydev driver has an ack_interrupt function, call it to
110 * ack and clear the phy device's interrupt.
112 * Returns 0 on success on < 0 on error.
114 int phy_clear_interrupt(struct phy_device
*phydev
)
118 if (phydev
->drv
->ack_interrupt
)
119 err
= phydev
->drv
->ack_interrupt(phydev
);
125 * phy_config_interrupt - configure the PHY device for the requested interrupts
126 * @phydev: the phy_device struct
127 * @interrupts: interrupt flags to configure for this @phydev
129 * Returns 0 on success on < 0 on error.
131 int phy_config_interrupt(struct phy_device
*phydev
, u32 interrupts
)
135 phydev
->interrupts
= interrupts
;
136 if (phydev
->drv
->config_intr
)
137 err
= phydev
->drv
->config_intr(phydev
);
144 * phy_aneg_done - return auto-negotiation status
145 * @phydev: target phy_device struct
147 * Description: Reads the status register and returns 0 either if
148 * auto-negotiation is incomplete, or if there was an error.
149 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
151 static inline int phy_aneg_done(struct phy_device
*phydev
)
155 retval
= phy_read(phydev
, MII_BMSR
);
157 return (retval
< 0) ? retval
: (retval
& BMSR_ANEGCOMPLETE
);
160 /* A structure for mapping a particular speed and duplex
161 * combination to a particular SUPPORTED and ADVERTISED value */
168 /* A mapping of all SUPPORTED settings to speed/duplex */
169 static const struct phy_setting settings
[] = {
172 .duplex
= DUPLEX_FULL
,
173 .setting
= SUPPORTED_10000baseT_Full
,
177 .duplex
= DUPLEX_FULL
,
178 .setting
= SUPPORTED_1000baseT_Full
,
182 .duplex
= DUPLEX_HALF
,
183 .setting
= SUPPORTED_1000baseT_Half
,
187 .duplex
= DUPLEX_FULL
,
188 .setting
= SUPPORTED_100baseT_Full
,
192 .duplex
= DUPLEX_HALF
,
193 .setting
= SUPPORTED_100baseT_Half
,
197 .duplex
= DUPLEX_FULL
,
198 .setting
= SUPPORTED_10baseT_Full
,
202 .duplex
= DUPLEX_HALF
,
203 .setting
= SUPPORTED_10baseT_Half
,
207 #define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting))
210 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
211 * @speed: speed to match
212 * @duplex: duplex to match
214 * Description: Searches the settings array for the setting which
215 * matches the desired speed and duplex, and returns the index
216 * of that setting. Returns the index of the last setting if
217 * none of the others match.
219 static inline int phy_find_setting(int speed
, int duplex
)
223 while (idx
< ARRAY_SIZE(settings
) &&
224 (settings
[idx
].speed
!= speed
||
225 settings
[idx
].duplex
!= duplex
))
228 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
232 * phy_find_valid - find a PHY setting that matches the requested features mask
233 * @idx: The first index in settings[] to search
234 * @features: A mask of the valid settings
236 * Description: Returns the index of the first valid setting less
237 * than or equal to the one pointed to by idx, as determined by
238 * the mask in features. Returns the index of the last setting
239 * if nothing else matches.
241 static inline int phy_find_valid(int idx
, u32 features
)
243 while (idx
< MAX_NUM_SETTINGS
&& !(settings
[idx
].setting
& features
))
246 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
250 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
251 * @phydev: the target phy_device struct
253 * Description: Make sure the PHY is set to supported speeds and
254 * duplexes. Drop down by one in this order: 1000/FULL,
255 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
257 void phy_sanitize_settings(struct phy_device
*phydev
)
259 u32 features
= phydev
->supported
;
262 /* Sanitize settings based on PHY capabilities */
263 if ((features
& SUPPORTED_Autoneg
) == 0)
264 phydev
->autoneg
= AUTONEG_DISABLE
;
266 idx
= phy_find_valid(phy_find_setting(phydev
->speed
, phydev
->duplex
),
269 phydev
->speed
= settings
[idx
].speed
;
270 phydev
->duplex
= settings
[idx
].duplex
;
272 EXPORT_SYMBOL(phy_sanitize_settings
);
275 * phy_ethtool_sset - generic ethtool sset function, handles all the details
276 * @phydev: target phy_device struct
279 * A few notes about parameter checking:
280 * - We don't set port or transceiver, so we don't care what they
282 * - phy_start_aneg() will make sure forced settings are sane, and
283 * choose the next best ones from the ones selected, so we don't
284 * care if ethtool tries to give us bad values.
286 int phy_ethtool_sset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
288 if (cmd
->phy_address
!= phydev
->addr
)
291 /* We make sure that we don't pass unsupported
292 * values in to the PHY */
293 cmd
->advertising
&= phydev
->supported
;
295 /* Verify the settings we care about. */
296 if (cmd
->autoneg
!= AUTONEG_ENABLE
&& cmd
->autoneg
!= AUTONEG_DISABLE
)
299 if (cmd
->autoneg
== AUTONEG_ENABLE
&& cmd
->advertising
== 0)
302 if (cmd
->autoneg
== AUTONEG_DISABLE
303 && ((cmd
->speed
!= SPEED_1000
304 && cmd
->speed
!= SPEED_100
305 && cmd
->speed
!= SPEED_10
)
306 || (cmd
->duplex
!= DUPLEX_HALF
307 && cmd
->duplex
!= DUPLEX_FULL
)))
310 phydev
->autoneg
= cmd
->autoneg
;
312 phydev
->speed
= cmd
->speed
;
314 phydev
->advertising
= cmd
->advertising
;
316 if (AUTONEG_ENABLE
== cmd
->autoneg
)
317 phydev
->advertising
|= ADVERTISED_Autoneg
;
319 phydev
->advertising
&= ~ADVERTISED_Autoneg
;
321 phydev
->duplex
= cmd
->duplex
;
323 /* Restart the PHY */
324 phy_start_aneg(phydev
);
328 EXPORT_SYMBOL(phy_ethtool_sset
);
330 int phy_ethtool_gset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
332 cmd
->supported
= phydev
->supported
;
334 cmd
->advertising
= phydev
->advertising
;
336 cmd
->speed
= phydev
->speed
;
337 cmd
->duplex
= phydev
->duplex
;
338 cmd
->port
= PORT_MII
;
339 cmd
->phy_address
= phydev
->addr
;
340 cmd
->transceiver
= XCVR_EXTERNAL
;
341 cmd
->autoneg
= phydev
->autoneg
;
345 EXPORT_SYMBOL(phy_ethtool_gset
);
348 * phy_mii_ioctl - generic PHY MII ioctl interface
349 * @phydev: the phy_device struct
350 * @mii_data: MII ioctl data
351 * @cmd: ioctl cmd to execute
353 * Note that this function is currently incompatible with the
354 * PHYCONTROL layer. It changes registers without regard to
355 * current state. Use at own risk.
357 int phy_mii_ioctl(struct phy_device
*phydev
,
358 struct mii_ioctl_data
*mii_data
, int cmd
)
360 u16 val
= mii_data
->val_in
;
364 mii_data
->phy_id
= phydev
->addr
;
367 mii_data
->val_out
= phy_read(phydev
, mii_data
->reg_num
);
371 if (!capable(CAP_NET_ADMIN
))
374 if (mii_data
->phy_id
== phydev
->addr
) {
375 switch(mii_data
->reg_num
) {
377 if ((val
& (BMCR_RESET
|BMCR_ANENABLE
)) == 0)
378 phydev
->autoneg
= AUTONEG_DISABLE
;
380 phydev
->autoneg
= AUTONEG_ENABLE
;
381 if ((!phydev
->autoneg
) && (val
& BMCR_FULLDPLX
))
382 phydev
->duplex
= DUPLEX_FULL
;
384 phydev
->duplex
= DUPLEX_HALF
;
385 if ((!phydev
->autoneg
) &&
386 (val
& BMCR_SPEED1000
))
387 phydev
->speed
= SPEED_1000
;
388 else if ((!phydev
->autoneg
) &&
389 (val
& BMCR_SPEED100
))
390 phydev
->speed
= SPEED_100
;
393 phydev
->advertising
= val
;
401 phy_write(phydev
, mii_data
->reg_num
, val
);
403 if (mii_data
->reg_num
== MII_BMCR
405 && phydev
->drv
->config_init
)
406 phydev
->drv
->config_init(phydev
);
412 EXPORT_SYMBOL(phy_mii_ioctl
);
415 * phy_start_aneg - start auto-negotiation for this PHY device
416 * @phydev: the phy_device struct
418 * Description: Sanitizes the settings (if we're not autonegotiating
419 * them), and then calls the driver's config_aneg function.
420 * If the PHYCONTROL Layer is operating, we change the state to
421 * reflect the beginning of Auto-negotiation or forcing.
423 int phy_start_aneg(struct phy_device
*phydev
)
427 spin_lock(&phydev
->lock
);
429 if (AUTONEG_DISABLE
== phydev
->autoneg
)
430 phy_sanitize_settings(phydev
);
432 err
= phydev
->drv
->config_aneg(phydev
);
437 if (phydev
->state
!= PHY_HALTED
) {
438 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
439 phydev
->state
= PHY_AN
;
440 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
442 phydev
->state
= PHY_FORCING
;
443 phydev
->link_timeout
= PHY_FORCE_TIMEOUT
;
448 spin_unlock(&phydev
->lock
);
451 EXPORT_SYMBOL(phy_start_aneg
);
454 static void phy_change(struct work_struct
*work
);
455 static void phy_timer(unsigned long data
);
458 * phy_start_machine - start PHY state machine tracking
459 * @phydev: the phy_device struct
460 * @handler: callback function for state change notifications
462 * Description: The PHY infrastructure can run a state machine
463 * which tracks whether the PHY is starting up, negotiating,
464 * etc. This function starts the timer which tracks the state
465 * of the PHY. If you want to be notified when the state changes,
466 * pass in the callback @handler, otherwise, pass NULL. If you
467 * want to maintain your own state machine, do not call this
470 void phy_start_machine(struct phy_device
*phydev
,
471 void (*handler
)(struct net_device
*))
473 phydev
->adjust_state
= handler
;
475 init_timer(&phydev
->phy_timer
);
476 phydev
->phy_timer
.function
= &phy_timer
;
477 phydev
->phy_timer
.data
= (unsigned long) phydev
;
478 mod_timer(&phydev
->phy_timer
, jiffies
+ HZ
);
482 * phy_stop_machine - stop the PHY state machine tracking
483 * @phydev: target phy_device struct
485 * Description: Stops the state machine timer, sets the state to UP
486 * (unless it wasn't up yet). This function must be called BEFORE
489 void phy_stop_machine(struct phy_device
*phydev
)
491 del_timer_sync(&phydev
->phy_timer
);
493 spin_lock(&phydev
->lock
);
494 if (phydev
->state
> PHY_UP
)
495 phydev
->state
= PHY_UP
;
496 spin_unlock(&phydev
->lock
);
498 phydev
->adjust_state
= NULL
;
502 * phy_force_reduction - reduce PHY speed/duplex settings by one step
503 * @phydev: target phy_device struct
505 * Description: Reduces the speed/duplex settings by one notch,
507 * 1000/FULL, 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
508 * The function bottoms out at 10/HALF.
510 static void phy_force_reduction(struct phy_device
*phydev
)
514 idx
= phy_find_setting(phydev
->speed
, phydev
->duplex
);
518 idx
= phy_find_valid(idx
, phydev
->supported
);
520 phydev
->speed
= settings
[idx
].speed
;
521 phydev
->duplex
= settings
[idx
].duplex
;
523 pr_info("Trying %d/%s\n", phydev
->speed
,
524 DUPLEX_FULL
== phydev
->duplex
?
530 * phy_error - enter HALTED state for this PHY device
531 * @phydev: target phy_device struct
533 * Moves the PHY to the HALTED state in response to a read
534 * or write error, and tells the controller the link is down.
535 * Must not be called from interrupt context, or while the
536 * phydev->lock is held.
538 void phy_error(struct phy_device
*phydev
)
540 spin_lock(&phydev
->lock
);
541 phydev
->state
= PHY_HALTED
;
542 spin_unlock(&phydev
->lock
);
546 * phy_interrupt - PHY interrupt handler
547 * @irq: interrupt line
548 * @phy_dat: phy_device pointer
550 * Description: When a PHY interrupt occurs, the handler disables
551 * interrupts, and schedules a work task to clear the interrupt.
553 static irqreturn_t
phy_interrupt(int irq
, void *phy_dat
)
555 struct phy_device
*phydev
= phy_dat
;
557 if (PHY_HALTED
== phydev
->state
)
558 return IRQ_NONE
; /* It can't be ours. */
560 /* The MDIO bus is not allowed to be written in interrupt
561 * context, so we need to disable the irq here. A work
562 * queue will write the PHY to disable and clear the
563 * interrupt, and then reenable the irq line. */
564 disable_irq_nosync(irq
);
566 schedule_work(&phydev
->phy_queue
);
572 * phy_enable_interrupts - Enable the interrupts from the PHY side
573 * @phydev: target phy_device struct
575 int phy_enable_interrupts(struct phy_device
*phydev
)
579 err
= phy_clear_interrupt(phydev
);
584 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
588 EXPORT_SYMBOL(phy_enable_interrupts
);
591 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
592 * @phydev: target phy_device struct
594 int phy_disable_interrupts(struct phy_device
*phydev
)
598 /* Disable PHY interrupts */
599 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
604 /* Clear the interrupt */
605 err
= phy_clear_interrupt(phydev
);
617 EXPORT_SYMBOL(phy_disable_interrupts
);
620 * phy_start_interrupts - request and enable interrupts for a PHY device
621 * @phydev: target phy_device struct
623 * Description: Request the interrupt for the given PHY.
624 * If this fails, then we set irq to PHY_POLL.
625 * Otherwise, we enable the interrupts in the PHY.
626 * This should only be called with a valid IRQ number.
627 * Returns 0 on success or < 0 on error.
629 int phy_start_interrupts(struct phy_device
*phydev
)
633 INIT_WORK(&phydev
->phy_queue
, phy_change
);
635 if (request_irq(phydev
->irq
, phy_interrupt
,
639 printk(KERN_WARNING
"%s: Can't get IRQ %d (PHY)\n",
642 phydev
->irq
= PHY_POLL
;
646 err
= phy_enable_interrupts(phydev
);
650 EXPORT_SYMBOL(phy_start_interrupts
);
653 * phy_stop_interrupts - disable interrupts from a PHY device
654 * @phydev: target phy_device struct
656 int phy_stop_interrupts(struct phy_device
*phydev
)
660 err
= phy_disable_interrupts(phydev
);
666 * Finish any pending work; we might have been scheduled to be called
667 * from keventd ourselves, but cancel_work_sync() handles that.
669 cancel_work_sync(&phydev
->phy_queue
);
671 free_irq(phydev
->irq
, phydev
);
675 EXPORT_SYMBOL(phy_stop_interrupts
);
679 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
680 * @work: work_struct that describes the work to be done
682 static void phy_change(struct work_struct
*work
)
685 struct phy_device
*phydev
=
686 container_of(work
, struct phy_device
, phy_queue
);
688 err
= phy_disable_interrupts(phydev
);
693 spin_lock(&phydev
->lock
);
694 if ((PHY_RUNNING
== phydev
->state
) || (PHY_NOLINK
== phydev
->state
))
695 phydev
->state
= PHY_CHANGELINK
;
696 spin_unlock(&phydev
->lock
);
698 enable_irq(phydev
->irq
);
700 /* Reenable interrupts */
701 if (PHY_HALTED
!= phydev
->state
)
702 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
710 disable_irq(phydev
->irq
);
716 * phy_stop - Bring down the PHY link, and stop checking the status
717 * @phydev: target phy_device struct
719 void phy_stop(struct phy_device
*phydev
)
721 spin_lock(&phydev
->lock
);
723 if (PHY_HALTED
== phydev
->state
)
726 phydev
->state
= PHY_HALTED
;
728 if (phydev
->irq
!= PHY_POLL
) {
729 /* Disable PHY Interrupts */
730 phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
732 /* Clear any pending interrupts */
733 phy_clear_interrupt(phydev
);
737 spin_unlock(&phydev
->lock
);
740 * Cannot call flush_scheduled_work() here as desired because
741 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
742 * will not reenable interrupts.
748 * phy_start - start or restart a PHY device
749 * @phydev: target phy_device struct
751 * Description: Indicates the attached device's readiness to
752 * handle PHY-related work. Used during startup to start the
753 * PHY, and after a call to phy_stop() to resume operation.
754 * Also used to indicate the MDIO bus has cleared an error
757 void phy_start(struct phy_device
*phydev
)
759 spin_lock_bh(&phydev
->lock
);
761 switch (phydev
->state
) {
763 phydev
->state
= PHY_PENDING
;
766 phydev
->state
= PHY_UP
;
769 phydev
->state
= PHY_RESUMING
;
773 spin_unlock_bh(&phydev
->lock
);
775 EXPORT_SYMBOL(phy_stop
);
776 EXPORT_SYMBOL(phy_start
);
778 /* PHY timer which handles the state machine */
779 static void phy_timer(unsigned long data
)
781 struct phy_device
*phydev
= (struct phy_device
*)data
;
785 spin_lock(&phydev
->lock
);
787 if (phydev
->adjust_state
)
788 phydev
->adjust_state(phydev
->attached_dev
);
790 switch(phydev
->state
) {
799 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
803 err
= phy_read_status(phydev
);
808 /* If the link is down, give up on
809 * negotiation for now */
811 phydev
->state
= PHY_NOLINK
;
812 netif_carrier_off(phydev
->attached_dev
);
813 phydev
->adjust_link(phydev
->attached_dev
);
817 /* Check if negotiation is done. Break
818 * if there's an error */
819 err
= phy_aneg_done(phydev
);
823 /* If AN is done, we're running */
825 phydev
->state
= PHY_RUNNING
;
826 netif_carrier_on(phydev
->attached_dev
);
827 phydev
->adjust_link(phydev
->attached_dev
);
829 } else if (0 == phydev
->link_timeout
--) {
833 /* If we have the magic_aneg bit,
835 if (phydev
->drv
->flags
& PHY_HAS_MAGICANEG
)
838 /* The timer expired, and we still
839 * don't have a setting, so we try
840 * forcing it until we find one that
841 * works, starting from the fastest speed,
842 * and working our way down */
843 idx
= phy_find_valid(0, phydev
->supported
);
845 phydev
->speed
= settings
[idx
].speed
;
846 phydev
->duplex
= settings
[idx
].duplex
;
848 phydev
->autoneg
= AUTONEG_DISABLE
;
850 pr_info("Trying %d/%s\n", phydev
->speed
,
857 err
= phy_read_status(phydev
);
863 phydev
->state
= PHY_RUNNING
;
864 netif_carrier_on(phydev
->attached_dev
);
865 phydev
->adjust_link(phydev
->attached_dev
);
869 err
= genphy_update_link(phydev
);
875 phydev
->state
= PHY_RUNNING
;
876 netif_carrier_on(phydev
->attached_dev
);
878 if (0 == phydev
->link_timeout
--) {
879 phy_force_reduction(phydev
);
884 phydev
->adjust_link(phydev
->attached_dev
);
887 /* Only register a CHANGE if we are
889 if (PHY_POLL
== phydev
->irq
)
890 phydev
->state
= PHY_CHANGELINK
;
893 err
= phy_read_status(phydev
);
899 phydev
->state
= PHY_RUNNING
;
900 netif_carrier_on(phydev
->attached_dev
);
902 phydev
->state
= PHY_NOLINK
;
903 netif_carrier_off(phydev
->attached_dev
);
906 phydev
->adjust_link(phydev
->attached_dev
);
908 if (PHY_POLL
!= phydev
->irq
)
909 err
= phy_config_interrupt(phydev
,
910 PHY_INTERRUPT_ENABLED
);
915 netif_carrier_off(phydev
->attached_dev
);
916 phydev
->adjust_link(phydev
->attached_dev
);
921 err
= phy_clear_interrupt(phydev
);
926 err
= phy_config_interrupt(phydev
,
927 PHY_INTERRUPT_ENABLED
);
932 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
933 err
= phy_aneg_done(phydev
);
937 /* err > 0 if AN is done.
938 * Otherwise, it's 0, and we're
939 * still waiting for AN */
941 phydev
->state
= PHY_RUNNING
;
943 phydev
->state
= PHY_AN
;
944 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
947 phydev
->state
= PHY_RUNNING
;
951 spin_unlock(&phydev
->lock
);
954 err
= phy_start_aneg(phydev
);
959 mod_timer(&phydev
->phy_timer
, jiffies
+ PHY_STATE_TIME
* HZ
);