1 /* Framework for configuring and reading PHY devices
2 * Based on code in sungem_phy.c and gianfar_phy.c
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
7 * Copyright (c) 2006, 2007 Maciej W. Rozycki
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/unistd.h>
22 #include <linux/interrupt.h>
23 #include <linux/delay.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/skbuff.h>
28 #include <linux/module.h>
29 #include <linux/mii.h>
30 #include <linux/ethtool.h>
31 #include <linux/phy.h>
32 #include <linux/timer.h>
33 #include <linux/workqueue.h>
34 #include <linux/mdio.h>
36 #include <linux/uaccess.h>
37 #include <linux/atomic.h>
41 static const char *phy_speed_to_str(int speed
)
57 return "Unsupported (update phy.c)";
61 #define PHY_STATE_STR(_state) \
63 return __stringify(_state); \
65 static const char *phy_state_to_str(enum phy_state st)
69 PHY_STATE_STR(STARTING
)
71 PHY_STATE_STR(PENDING
)
74 PHY_STATE_STR(RUNNING
)
76 PHY_STATE_STR(FORCING
)
77 PHY_STATE_STR(CHANGELINK
)
79 PHY_STATE_STR(RESUMING
)
87 * phy_print_status - Convenience function to print out the current phy status
88 * @phydev: the phy_device struct
90 void phy_print_status(struct phy_device
*phydev
)
93 netdev_info(phydev
->attached_dev
,
94 "Link is Up - %s/%s - flow control %s\n",
95 phy_speed_to_str(phydev
->speed
),
96 DUPLEX_FULL
== phydev
->duplex
? "Full" : "Half",
97 phydev
->pause
? "rx/tx" : "off");
99 netdev_info(phydev
->attached_dev
, "Link is Down\n");
102 EXPORT_SYMBOL(phy_print_status
);
105 * phy_clear_interrupt - Ack the phy device's interrupt
106 * @phydev: the phy_device struct
108 * If the @phydev driver has an ack_interrupt function, call it to
109 * ack and clear the phy device's interrupt.
111 * Returns 0 on success or < 0 on error.
113 static int phy_clear_interrupt(struct phy_device
*phydev
)
115 if (phydev
->drv
->ack_interrupt
)
116 return phydev
->drv
->ack_interrupt(phydev
);
122 * phy_config_interrupt - configure the PHY device for the requested interrupts
123 * @phydev: the phy_device struct
124 * @interrupts: interrupt flags to configure for this @phydev
126 * Returns 0 on success or < 0 on error.
128 static int phy_config_interrupt(struct phy_device
*phydev
, u32 interrupts
)
130 phydev
->interrupts
= interrupts
;
131 if (phydev
->drv
->config_intr
)
132 return phydev
->drv
->config_intr(phydev
);
139 * phy_aneg_done - return auto-negotiation status
140 * @phydev: target phy_device struct
142 * Description: Return the auto-negotiation status from this @phydev
143 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
146 static inline int phy_aneg_done(struct phy_device
*phydev
)
148 if (phydev
->drv
->aneg_done
)
149 return phydev
->drv
->aneg_done(phydev
);
151 return genphy_aneg_done(phydev
);
154 /* A structure for mapping a particular speed and duplex
155 * combination to a particular SUPPORTED and ADVERTISED value
163 /* A mapping of all SUPPORTED settings to speed/duplex */
164 static const struct phy_setting settings
[] = {
166 .speed
= SPEED_10000
,
167 .duplex
= DUPLEX_FULL
,
168 .setting
= SUPPORTED_10000baseKR_Full
,
171 .speed
= SPEED_10000
,
172 .duplex
= DUPLEX_FULL
,
173 .setting
= SUPPORTED_10000baseKX4_Full
,
176 .speed
= SPEED_10000
,
177 .duplex
= DUPLEX_FULL
,
178 .setting
= SUPPORTED_10000baseT_Full
,
182 .duplex
= DUPLEX_FULL
,
183 .setting
= SUPPORTED_2500baseX_Full
,
187 .duplex
= DUPLEX_FULL
,
188 .setting
= SUPPORTED_1000baseKX_Full
,
192 .duplex
= DUPLEX_FULL
,
193 .setting
= SUPPORTED_1000baseT_Full
,
197 .duplex
= DUPLEX_HALF
,
198 .setting
= SUPPORTED_1000baseT_Half
,
202 .duplex
= DUPLEX_FULL
,
203 .setting
= SUPPORTED_100baseT_Full
,
207 .duplex
= DUPLEX_HALF
,
208 .setting
= SUPPORTED_100baseT_Half
,
212 .duplex
= DUPLEX_FULL
,
213 .setting
= SUPPORTED_10baseT_Full
,
217 .duplex
= DUPLEX_HALF
,
218 .setting
= SUPPORTED_10baseT_Half
,
222 #define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
225 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
226 * @speed: speed to match
227 * @duplex: duplex to match
229 * Description: Searches the settings array for the setting which
230 * matches the desired speed and duplex, and returns the index
231 * of that setting. Returns the index of the last setting if
232 * none of the others match.
234 static inline unsigned int phy_find_setting(int speed
, int duplex
)
236 unsigned int idx
= 0;
238 while (idx
< ARRAY_SIZE(settings
) &&
239 (settings
[idx
].speed
!= speed
|| settings
[idx
].duplex
!= duplex
))
242 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
246 * phy_find_valid - find a PHY setting that matches the requested features mask
247 * @idx: The first index in settings[] to search
248 * @features: A mask of the valid settings
250 * Description: Returns the index of the first valid setting less
251 * than or equal to the one pointed to by idx, as determined by
252 * the mask in features. Returns the index of the last setting
253 * if nothing else matches.
255 static inline unsigned int phy_find_valid(unsigned int idx
, u32 features
)
257 while (idx
< MAX_NUM_SETTINGS
&& !(settings
[idx
].setting
& features
))
260 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
264 * phy_check_valid - check if there is a valid PHY setting which matches
265 * speed, duplex, and feature mask
266 * @speed: speed to match
267 * @duplex: duplex to match
268 * @features: A mask of the valid settings
270 * Description: Returns true if there is a valid setting, false otherwise.
272 static inline bool phy_check_valid(int speed
, int duplex
, u32 features
)
276 idx
= phy_find_valid(phy_find_setting(speed
, duplex
), features
);
278 return settings
[idx
].speed
== speed
&& settings
[idx
].duplex
== duplex
&&
279 (settings
[idx
].setting
& features
);
283 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
284 * @phydev: the target phy_device struct
286 * Description: Make sure the PHY is set to supported speeds and
287 * duplexes. Drop down by one in this order: 1000/FULL,
288 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
290 static void phy_sanitize_settings(struct phy_device
*phydev
)
292 u32 features
= phydev
->supported
;
295 /* Sanitize settings based on PHY capabilities */
296 if ((features
& SUPPORTED_Autoneg
) == 0)
297 phydev
->autoneg
= AUTONEG_DISABLE
;
299 idx
= phy_find_valid(phy_find_setting(phydev
->speed
, phydev
->duplex
),
302 phydev
->speed
= settings
[idx
].speed
;
303 phydev
->duplex
= settings
[idx
].duplex
;
307 * phy_ethtool_sset - generic ethtool sset function, handles all the details
308 * @phydev: target phy_device struct
311 * A few notes about parameter checking:
312 * - We don't set port or transceiver, so we don't care what they
314 * - phy_start_aneg() will make sure forced settings are sane, and
315 * choose the next best ones from the ones selected, so we don't
316 * care if ethtool tries to give us bad values.
318 int phy_ethtool_sset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
320 u32 speed
= ethtool_cmd_speed(cmd
);
322 if (cmd
->phy_address
!= phydev
->addr
)
325 /* We make sure that we don't pass unsupported values in to the PHY */
326 cmd
->advertising
&= phydev
->supported
;
328 /* Verify the settings we care about. */
329 if (cmd
->autoneg
!= AUTONEG_ENABLE
&& cmd
->autoneg
!= AUTONEG_DISABLE
)
332 if (cmd
->autoneg
== AUTONEG_ENABLE
&& cmd
->advertising
== 0)
335 if (cmd
->autoneg
== AUTONEG_DISABLE
&&
336 ((speed
!= SPEED_1000
&&
337 speed
!= SPEED_100
&&
338 speed
!= SPEED_10
) ||
339 (cmd
->duplex
!= DUPLEX_HALF
&&
340 cmd
->duplex
!= DUPLEX_FULL
)))
343 phydev
->autoneg
= cmd
->autoneg
;
345 phydev
->speed
= speed
;
347 phydev
->advertising
= cmd
->advertising
;
349 if (AUTONEG_ENABLE
== cmd
->autoneg
)
350 phydev
->advertising
|= ADVERTISED_Autoneg
;
352 phydev
->advertising
&= ~ADVERTISED_Autoneg
;
354 phydev
->duplex
= cmd
->duplex
;
356 /* Restart the PHY */
357 phy_start_aneg(phydev
);
361 EXPORT_SYMBOL(phy_ethtool_sset
);
363 int phy_ethtool_gset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
365 cmd
->supported
= phydev
->supported
;
367 cmd
->advertising
= phydev
->advertising
;
368 cmd
->lp_advertising
= phydev
->lp_advertising
;
370 ethtool_cmd_speed_set(cmd
, phydev
->speed
);
371 cmd
->duplex
= phydev
->duplex
;
372 if (phydev
->interface
== PHY_INTERFACE_MODE_MOCA
)
373 cmd
->port
= PORT_BNC
;
375 cmd
->port
= PORT_MII
;
376 cmd
->phy_address
= phydev
->addr
;
377 cmd
->transceiver
= phy_is_internal(phydev
) ?
378 XCVR_INTERNAL
: XCVR_EXTERNAL
;
379 cmd
->autoneg
= phydev
->autoneg
;
383 EXPORT_SYMBOL(phy_ethtool_gset
);
386 * phy_mii_ioctl - generic PHY MII ioctl interface
387 * @phydev: the phy_device struct
388 * @ifr: &struct ifreq for socket ioctl's
389 * @cmd: ioctl cmd to execute
391 * Note that this function is currently incompatible with the
392 * PHYCONTROL layer. It changes registers without regard to
393 * current state. Use at own risk.
395 int phy_mii_ioctl(struct phy_device
*phydev
, struct ifreq
*ifr
, int cmd
)
397 struct mii_ioctl_data
*mii_data
= if_mii(ifr
);
398 u16 val
= mii_data
->val_in
;
399 bool change_autoneg
= false;
403 mii_data
->phy_id
= phydev
->addr
;
407 mii_data
->val_out
= mdiobus_read(phydev
->bus
, mii_data
->phy_id
,
412 if (mii_data
->phy_id
== phydev
->addr
) {
413 switch (mii_data
->reg_num
) {
415 if ((val
& (BMCR_RESET
| BMCR_ANENABLE
)) == 0) {
416 if (phydev
->autoneg
== AUTONEG_ENABLE
)
417 change_autoneg
= true;
418 phydev
->autoneg
= AUTONEG_DISABLE
;
419 if (val
& BMCR_FULLDPLX
)
420 phydev
->duplex
= DUPLEX_FULL
;
422 phydev
->duplex
= DUPLEX_HALF
;
423 if (val
& BMCR_SPEED1000
)
424 phydev
->speed
= SPEED_1000
;
425 else if (val
& BMCR_SPEED100
)
426 phydev
->speed
= SPEED_100
;
427 else phydev
->speed
= SPEED_10
;
430 if (phydev
->autoneg
== AUTONEG_DISABLE
)
431 change_autoneg
= true;
432 phydev
->autoneg
= AUTONEG_ENABLE
;
436 phydev
->advertising
= mii_adv_to_ethtool_adv_t(val
);
437 change_autoneg
= true;
445 mdiobus_write(phydev
->bus
, mii_data
->phy_id
,
446 mii_data
->reg_num
, val
);
448 if (mii_data
->reg_num
== MII_BMCR
&&
450 return phy_init_hw(phydev
);
453 return phy_start_aneg(phydev
);
458 if (phydev
->drv
->hwtstamp
)
459 return phydev
->drv
->hwtstamp(phydev
, ifr
);
466 EXPORT_SYMBOL(phy_mii_ioctl
);
469 * phy_start_aneg - start auto-negotiation for this PHY device
470 * @phydev: the phy_device struct
472 * Description: Sanitizes the settings (if we're not autonegotiating
473 * them), and then calls the driver's config_aneg function.
474 * If the PHYCONTROL Layer is operating, we change the state to
475 * reflect the beginning of Auto-negotiation or forcing.
477 int phy_start_aneg(struct phy_device
*phydev
)
481 mutex_lock(&phydev
->lock
);
483 if (AUTONEG_DISABLE
== phydev
->autoneg
)
484 phy_sanitize_settings(phydev
);
486 /* Invalidate LP advertising flags */
487 phydev
->lp_advertising
= 0;
489 err
= phydev
->drv
->config_aneg(phydev
);
493 if (phydev
->state
!= PHY_HALTED
) {
494 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
495 phydev
->state
= PHY_AN
;
496 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
498 phydev
->state
= PHY_FORCING
;
499 phydev
->link_timeout
= PHY_FORCE_TIMEOUT
;
504 mutex_unlock(&phydev
->lock
);
507 EXPORT_SYMBOL(phy_start_aneg
);
510 * phy_start_machine - start PHY state machine tracking
511 * @phydev: the phy_device struct
513 * Description: The PHY infrastructure can run a state machine
514 * which tracks whether the PHY is starting up, negotiating,
515 * etc. This function starts the timer which tracks the state
516 * of the PHY. If you want to maintain your own state machine,
517 * do not call this function.
519 void phy_start_machine(struct phy_device
*phydev
)
521 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, HZ
);
525 * phy_stop_machine - stop the PHY state machine tracking
526 * @phydev: target phy_device struct
528 * Description: Stops the state machine timer, sets the state to UP
529 * (unless it wasn't up yet). This function must be called BEFORE
532 void phy_stop_machine(struct phy_device
*phydev
)
534 cancel_delayed_work_sync(&phydev
->state_queue
);
536 mutex_lock(&phydev
->lock
);
537 if (phydev
->state
> PHY_UP
)
538 phydev
->state
= PHY_UP
;
539 mutex_unlock(&phydev
->lock
);
543 * phy_error - enter HALTED state for this PHY device
544 * @phydev: target phy_device struct
546 * Moves the PHY to the HALTED state in response to a read
547 * or write error, and tells the controller the link is down.
548 * Must not be called from interrupt context, or while the
549 * phydev->lock is held.
551 static void phy_error(struct phy_device
*phydev
)
553 mutex_lock(&phydev
->lock
);
554 phydev
->state
= PHY_HALTED
;
555 mutex_unlock(&phydev
->lock
);
559 * phy_interrupt - PHY interrupt handler
560 * @irq: interrupt line
561 * @phy_dat: phy_device pointer
563 * Description: When a PHY interrupt occurs, the handler disables
564 * interrupts, and schedules a work task to clear the interrupt.
566 static irqreturn_t
phy_interrupt(int irq
, void *phy_dat
)
568 struct phy_device
*phydev
= phy_dat
;
570 if (PHY_HALTED
== phydev
->state
)
571 return IRQ_NONE
; /* It can't be ours. */
573 /* The MDIO bus is not allowed to be written in interrupt
574 * context, so we need to disable the irq here. A work
575 * queue will write the PHY to disable and clear the
576 * interrupt, and then reenable the irq line.
578 disable_irq_nosync(irq
);
579 atomic_inc(&phydev
->irq_disable
);
581 queue_work(system_power_efficient_wq
, &phydev
->phy_queue
);
587 * phy_enable_interrupts - Enable the interrupts from the PHY side
588 * @phydev: target phy_device struct
590 static int phy_enable_interrupts(struct phy_device
*phydev
)
592 int err
= phy_clear_interrupt(phydev
);
597 return phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
601 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
602 * @phydev: target phy_device struct
604 static int phy_disable_interrupts(struct phy_device
*phydev
)
608 /* Disable PHY interrupts */
609 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
613 /* Clear the interrupt */
614 err
= phy_clear_interrupt(phydev
);
627 * phy_start_interrupts - request and enable interrupts for a PHY device
628 * @phydev: target phy_device struct
630 * Description: Request the interrupt for the given PHY.
631 * If this fails, then we set irq to PHY_POLL.
632 * Otherwise, we enable the interrupts in the PHY.
633 * This should only be called with a valid IRQ number.
634 * Returns 0 on success or < 0 on error.
636 int phy_start_interrupts(struct phy_device
*phydev
)
638 atomic_set(&phydev
->irq_disable
, 0);
639 if (request_irq(phydev
->irq
, phy_interrupt
, 0, "phy_interrupt",
641 pr_warn("%s: Can't get IRQ %d (PHY)\n",
642 phydev
->bus
->name
, phydev
->irq
);
643 phydev
->irq
= PHY_POLL
;
647 return phy_enable_interrupts(phydev
);
649 EXPORT_SYMBOL(phy_start_interrupts
);
652 * phy_stop_interrupts - disable interrupts from a PHY device
653 * @phydev: target phy_device struct
655 int phy_stop_interrupts(struct phy_device
*phydev
)
657 int err
= phy_disable_interrupts(phydev
);
662 free_irq(phydev
->irq
, phydev
);
664 /* Cannot call flush_scheduled_work() here as desired because
665 * of rtnl_lock(), but we do not really care about what would
666 * be done, except from enable_irq(), so cancel any work
667 * possibly pending and take care of the matter below.
669 cancel_work_sync(&phydev
->phy_queue
);
670 /* If work indeed has been cancelled, disable_irq() will have
671 * been left unbalanced from phy_interrupt() and enable_irq()
672 * has to be called so that other devices on the line work.
674 while (atomic_dec_return(&phydev
->irq_disable
) >= 0)
675 enable_irq(phydev
->irq
);
679 EXPORT_SYMBOL(phy_stop_interrupts
);
682 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
683 * @work: work_struct that describes the work to be done
685 void phy_change(struct work_struct
*work
)
687 struct phy_device
*phydev
=
688 container_of(work
, struct phy_device
, phy_queue
);
690 if (phydev
->drv
->did_interrupt
&&
691 !phydev
->drv
->did_interrupt(phydev
))
694 if (phy_disable_interrupts(phydev
))
697 mutex_lock(&phydev
->lock
);
698 if ((PHY_RUNNING
== phydev
->state
) || (PHY_NOLINK
== phydev
->state
))
699 phydev
->state
= PHY_CHANGELINK
;
700 mutex_unlock(&phydev
->lock
);
702 atomic_dec(&phydev
->irq_disable
);
703 enable_irq(phydev
->irq
);
705 /* Reenable interrupts */
706 if (PHY_HALTED
!= phydev
->state
&&
707 phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
))
710 /* reschedule state queue work to run as soon as possible */
711 cancel_delayed_work_sync(&phydev
->state_queue
);
712 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, 0);
716 atomic_dec(&phydev
->irq_disable
);
717 enable_irq(phydev
->irq
);
721 disable_irq(phydev
->irq
);
722 atomic_inc(&phydev
->irq_disable
);
728 * phy_stop - Bring down the PHY link, and stop checking the status
729 * @phydev: target phy_device struct
731 void phy_stop(struct phy_device
*phydev
)
733 mutex_lock(&phydev
->lock
);
735 if (PHY_HALTED
== phydev
->state
)
738 if (phy_interrupt_is_valid(phydev
)) {
739 /* Disable PHY Interrupts */
740 phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
742 /* Clear any pending interrupts */
743 phy_clear_interrupt(phydev
);
746 phydev
->state
= PHY_HALTED
;
749 mutex_unlock(&phydev
->lock
);
751 /* Cannot call flush_scheduled_work() here as desired because
752 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
753 * will not reenable interrupts.
756 EXPORT_SYMBOL(phy_stop
);
759 * phy_start - start or restart a PHY device
760 * @phydev: target phy_device struct
762 * Description: Indicates the attached device's readiness to
763 * handle PHY-related work. Used during startup to start the
764 * PHY, and after a call to phy_stop() to resume operation.
765 * Also used to indicate the MDIO bus has cleared an error
768 void phy_start(struct phy_device
*phydev
)
770 bool do_resume
= false;
773 mutex_lock(&phydev
->lock
);
775 switch (phydev
->state
) {
777 phydev
->state
= PHY_PENDING
;
780 phydev
->state
= PHY_UP
;
783 /* make sure interrupts are re-enabled for the PHY */
784 err
= phy_enable_interrupts(phydev
);
788 phydev
->state
= PHY_RESUMING
;
794 mutex_unlock(&phydev
->lock
);
796 /* if phy was suspended, bring the physical link up again */
800 EXPORT_SYMBOL(phy_start
);
803 * phy_state_machine - Handle the state machine
804 * @work: work_struct that describes the work to be done
806 void phy_state_machine(struct work_struct
*work
)
808 struct delayed_work
*dwork
= to_delayed_work(work
);
809 struct phy_device
*phydev
=
810 container_of(dwork
, struct phy_device
, state_queue
);
811 bool needs_aneg
= false, do_suspend
= false;
812 enum phy_state old_state
;
815 mutex_lock(&phydev
->lock
);
817 old_state
= phydev
->state
;
819 if (phydev
->drv
->link_change_notify
)
820 phydev
->drv
->link_change_notify(phydev
);
822 switch (phydev
->state
) {
831 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
835 err
= phy_read_status(phydev
);
839 /* If the link is down, give up on negotiation for now */
841 phydev
->state
= PHY_NOLINK
;
842 netif_carrier_off(phydev
->attached_dev
);
843 phydev
->adjust_link(phydev
->attached_dev
);
847 /* Check if negotiation is done. Break if there's an error */
848 err
= phy_aneg_done(phydev
);
852 /* If AN is done, we're running */
854 phydev
->state
= PHY_RUNNING
;
855 netif_carrier_on(phydev
->attached_dev
);
856 phydev
->adjust_link(phydev
->attached_dev
);
858 } else if (0 == phydev
->link_timeout
--)
862 err
= phy_read_status(phydev
);
867 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
868 err
= phy_aneg_done(phydev
);
873 phydev
->state
= PHY_AN
;
874 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
878 phydev
->state
= PHY_RUNNING
;
879 netif_carrier_on(phydev
->attached_dev
);
880 phydev
->adjust_link(phydev
->attached_dev
);
884 err
= genphy_update_link(phydev
);
889 phydev
->state
= PHY_RUNNING
;
890 netif_carrier_on(phydev
->attached_dev
);
892 if (0 == phydev
->link_timeout
--)
896 phydev
->adjust_link(phydev
->attached_dev
);
899 /* Only register a CHANGE if we are
900 * polling or ignoring interrupts
902 if (!phy_interrupt_is_valid(phydev
))
903 phydev
->state
= PHY_CHANGELINK
;
906 err
= phy_read_status(phydev
);
911 phydev
->state
= PHY_RUNNING
;
912 netif_carrier_on(phydev
->attached_dev
);
914 phydev
->state
= PHY_NOLINK
;
915 netif_carrier_off(phydev
->attached_dev
);
918 phydev
->adjust_link(phydev
->attached_dev
);
920 if (phy_interrupt_is_valid(phydev
))
921 err
= phy_config_interrupt(phydev
,
922 PHY_INTERRUPT_ENABLED
);
927 netif_carrier_off(phydev
->attached_dev
);
928 phydev
->adjust_link(phydev
->attached_dev
);
933 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
934 err
= phy_aneg_done(phydev
);
938 /* err > 0 if AN is done.
939 * Otherwise, it's 0, and we're still waiting for AN
942 err
= phy_read_status(phydev
);
947 phydev
->state
= PHY_RUNNING
;
948 netif_carrier_on(phydev
->attached_dev
);
950 phydev
->state
= PHY_NOLINK
;
952 phydev
->adjust_link(phydev
->attached_dev
);
954 phydev
->state
= PHY_AN
;
955 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
958 err
= phy_read_status(phydev
);
963 phydev
->state
= PHY_RUNNING
;
964 netif_carrier_on(phydev
->attached_dev
);
966 phydev
->state
= PHY_NOLINK
;
968 phydev
->adjust_link(phydev
->attached_dev
);
973 mutex_unlock(&phydev
->lock
);
976 err
= phy_start_aneg(phydev
);
983 dev_dbg(&phydev
->dev
, "PHY state change %s -> %s\n",
984 phy_state_to_str(old_state
), phy_state_to_str(phydev
->state
));
986 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
,
987 PHY_STATE_TIME
* HZ
);
990 void phy_mac_interrupt(struct phy_device
*phydev
, int new_link
)
992 cancel_work_sync(&phydev
->phy_queue
);
993 phydev
->link
= new_link
;
994 schedule_work(&phydev
->phy_queue
);
996 EXPORT_SYMBOL(phy_mac_interrupt
);
998 static inline void mmd_phy_indirect(struct mii_bus
*bus
, int prtad
, int devad
,
1001 /* Write the desired MMD Devad */
1002 bus
->write(bus
, addr
, MII_MMD_CTRL
, devad
);
1004 /* Write the desired MMD register address */
1005 bus
->write(bus
, addr
, MII_MMD_DATA
, prtad
);
1007 /* Select the Function : DATA with no post increment */
1008 bus
->write(bus
, addr
, MII_MMD_CTRL
, (devad
| MII_MMD_CTRL_NOINCR
));
1012 * phy_read_mmd_indirect - reads data from the MMD registers
1013 * @phydev: The PHY device bus
1014 * @prtad: MMD Address
1016 * @addr: PHY address on the MII bus
1018 * Description: it reads data from the MMD registers (clause 22 to access to
1019 * clause 45) of the specified phy address.
1020 * To read these register we have:
1021 * 1) Write reg 13 // DEVAD
1022 * 2) Write reg 14 // MMD Address
1023 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1024 * 3) Read reg 14 // Read MMD data
1026 int phy_read_mmd_indirect(struct phy_device
*phydev
, int prtad
,
1027 int devad
, int addr
)
1029 struct phy_driver
*phydrv
= phydev
->drv
;
1032 if (phydrv
->read_mmd_indirect
== NULL
) {
1033 mmd_phy_indirect(phydev
->bus
, prtad
, devad
, addr
);
1035 /* Read the content of the MMD's selected register */
1036 value
= phydev
->bus
->read(phydev
->bus
, addr
, MII_MMD_DATA
);
1038 value
= phydrv
->read_mmd_indirect(phydev
, prtad
, devad
, addr
);
1042 EXPORT_SYMBOL(phy_read_mmd_indirect
);
1045 * phy_write_mmd_indirect - writes data to the MMD registers
1046 * @phydev: The PHY device
1047 * @prtad: MMD Address
1049 * @addr: PHY address on the MII bus
1050 * @data: data to write in the MMD register
1052 * Description: Write data from the MMD registers of the specified
1054 * To write these register we have:
1055 * 1) Write reg 13 // DEVAD
1056 * 2) Write reg 14 // MMD Address
1057 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1058 * 3) Write reg 14 // Write MMD data
1060 void phy_write_mmd_indirect(struct phy_device
*phydev
, int prtad
,
1061 int devad
, int addr
, u32 data
)
1063 struct phy_driver
*phydrv
= phydev
->drv
;
1065 if (phydrv
->write_mmd_indirect
== NULL
) {
1066 mmd_phy_indirect(phydev
->bus
, prtad
, devad
, addr
);
1068 /* Write the data into MMD's selected register */
1069 phydev
->bus
->write(phydev
->bus
, addr
, MII_MMD_DATA
, data
);
1071 phydrv
->write_mmd_indirect(phydev
, prtad
, devad
, addr
, data
);
1074 EXPORT_SYMBOL(phy_write_mmd_indirect
);
1077 * phy_init_eee - init and check the EEE feature
1078 * @phydev: target phy_device struct
1079 * @clk_stop_enable: PHY may stop the clock during LPI
1081 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1082 * is supported by looking at the MMD registers 3.20 and 7.60/61
1083 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1086 int phy_init_eee(struct phy_device
*phydev
, bool clk_stop_enable
)
1088 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1089 * Also EEE feature is active when core is operating with MII, GMII
1090 * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1091 * should return an error if they do not support EEE.
1093 if ((phydev
->duplex
== DUPLEX_FULL
) &&
1094 ((phydev
->interface
== PHY_INTERFACE_MODE_MII
) ||
1095 (phydev
->interface
== PHY_INTERFACE_MODE_GMII
) ||
1096 phy_interface_is_rgmii(phydev
) ||
1097 phy_is_internal(phydev
))) {
1098 int eee_lp
, eee_cap
, eee_adv
;
1102 /* Read phy status to properly get the right settings */
1103 status
= phy_read_status(phydev
);
1107 /* First check if the EEE ability is supported */
1108 eee_cap
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1109 MDIO_MMD_PCS
, phydev
->addr
);
1113 cap
= mmd_eee_cap_to_ethtool_sup_t(eee_cap
);
1117 /* Check which link settings negotiated and verify it in
1118 * the EEE advertising registers.
1120 eee_lp
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1121 MDIO_MMD_AN
, phydev
->addr
);
1125 eee_adv
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1126 MDIO_MMD_AN
, phydev
->addr
);
1130 adv
= mmd_eee_adv_to_ethtool_adv_t(eee_adv
);
1131 lp
= mmd_eee_adv_to_ethtool_adv_t(eee_lp
);
1132 if (!phy_check_valid(phydev
->speed
, phydev
->duplex
, lp
& adv
))
1135 if (clk_stop_enable
) {
1136 /* Configure the PHY to stop receiving xMII
1137 * clock while it is signaling LPI.
1139 int val
= phy_read_mmd_indirect(phydev
, MDIO_CTRL1
,
1145 val
|= MDIO_PCS_CTRL1_CLKSTOP_EN
;
1146 phy_write_mmd_indirect(phydev
, MDIO_CTRL1
,
1147 MDIO_MMD_PCS
, phydev
->addr
,
1151 return 0; /* EEE supported */
1154 return -EPROTONOSUPPORT
;
1156 EXPORT_SYMBOL(phy_init_eee
);
1159 * phy_get_eee_err - report the EEE wake error count
1160 * @phydev: target phy_device struct
1162 * Description: it is to report the number of time where the PHY
1163 * failed to complete its normal wake sequence.
1165 int phy_get_eee_err(struct phy_device
*phydev
)
1167 return phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_WK_ERR
,
1168 MDIO_MMD_PCS
, phydev
->addr
);
1170 EXPORT_SYMBOL(phy_get_eee_err
);
1173 * phy_ethtool_get_eee - get EEE supported and status
1174 * @phydev: target phy_device struct
1175 * @data: ethtool_eee data
1177 * Description: it reportes the Supported/Advertisement/LP Advertisement
1180 int phy_ethtool_get_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1184 /* Get Supported EEE */
1185 val
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1186 MDIO_MMD_PCS
, phydev
->addr
);
1189 data
->supported
= mmd_eee_cap_to_ethtool_sup_t(val
);
1191 /* Get advertisement EEE */
1192 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1193 MDIO_MMD_AN
, phydev
->addr
);
1196 data
->advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1198 /* Get LP advertisement EEE */
1199 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1200 MDIO_MMD_AN
, phydev
->addr
);
1203 data
->lp_advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1207 EXPORT_SYMBOL(phy_ethtool_get_eee
);
1210 * phy_ethtool_set_eee - set EEE supported and status
1211 * @phydev: target phy_device struct
1212 * @data: ethtool_eee data
1214 * Description: it is to program the Advertisement EEE register.
1216 int phy_ethtool_set_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1218 int val
= ethtool_adv_to_mmd_eee_adv_t(data
->advertised
);
1220 phy_write_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
, MDIO_MMD_AN
,
1225 EXPORT_SYMBOL(phy_ethtool_set_eee
);
1227 int phy_ethtool_set_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1229 if (phydev
->drv
->set_wol
)
1230 return phydev
->drv
->set_wol(phydev
, wol
);
1234 EXPORT_SYMBOL(phy_ethtool_set_wol
);
1236 void phy_ethtool_get_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1238 if (phydev
->drv
->get_wol
)
1239 phydev
->drv
->get_wol(phydev
, wol
);
1241 EXPORT_SYMBOL(phy_ethtool_get_wol
);