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 phydev
->mdix
= cmd
->eth_tp_mdix_ctrl
;
358 /* Restart the PHY */
359 phy_start_aneg(phydev
);
363 EXPORT_SYMBOL(phy_ethtool_sset
);
365 int phy_ethtool_gset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
367 cmd
->supported
= phydev
->supported
;
369 cmd
->advertising
= phydev
->advertising
;
370 cmd
->lp_advertising
= phydev
->lp_advertising
;
372 ethtool_cmd_speed_set(cmd
, phydev
->speed
);
373 cmd
->duplex
= phydev
->duplex
;
374 if (phydev
->interface
== PHY_INTERFACE_MODE_MOCA
)
375 cmd
->port
= PORT_BNC
;
377 cmd
->port
= PORT_MII
;
378 cmd
->phy_address
= phydev
->addr
;
379 cmd
->transceiver
= phy_is_internal(phydev
) ?
380 XCVR_INTERNAL
: XCVR_EXTERNAL
;
381 cmd
->autoneg
= phydev
->autoneg
;
382 cmd
->eth_tp_mdix_ctrl
= phydev
->mdix
;
386 EXPORT_SYMBOL(phy_ethtool_gset
);
389 * phy_mii_ioctl - generic PHY MII ioctl interface
390 * @phydev: the phy_device struct
391 * @ifr: &struct ifreq for socket ioctl's
392 * @cmd: ioctl cmd to execute
394 * Note that this function is currently incompatible with the
395 * PHYCONTROL layer. It changes registers without regard to
396 * current state. Use at own risk.
398 int phy_mii_ioctl(struct phy_device
*phydev
, struct ifreq
*ifr
, int cmd
)
400 struct mii_ioctl_data
*mii_data
= if_mii(ifr
);
401 u16 val
= mii_data
->val_in
;
402 bool change_autoneg
= false;
406 mii_data
->phy_id
= phydev
->addr
;
410 mii_data
->val_out
= mdiobus_read(phydev
->bus
, mii_data
->phy_id
,
415 if (mii_data
->phy_id
== phydev
->addr
) {
416 switch (mii_data
->reg_num
) {
418 if ((val
& (BMCR_RESET
| BMCR_ANENABLE
)) == 0) {
419 if (phydev
->autoneg
== AUTONEG_ENABLE
)
420 change_autoneg
= true;
421 phydev
->autoneg
= AUTONEG_DISABLE
;
422 if (val
& BMCR_FULLDPLX
)
423 phydev
->duplex
= DUPLEX_FULL
;
425 phydev
->duplex
= DUPLEX_HALF
;
426 if (val
& BMCR_SPEED1000
)
427 phydev
->speed
= SPEED_1000
;
428 else if (val
& BMCR_SPEED100
)
429 phydev
->speed
= SPEED_100
;
430 else phydev
->speed
= SPEED_10
;
433 if (phydev
->autoneg
== AUTONEG_DISABLE
)
434 change_autoneg
= true;
435 phydev
->autoneg
= AUTONEG_ENABLE
;
439 phydev
->advertising
= mii_adv_to_ethtool_adv_t(val
);
440 change_autoneg
= true;
448 mdiobus_write(phydev
->bus
, mii_data
->phy_id
,
449 mii_data
->reg_num
, val
);
451 if (mii_data
->reg_num
== MII_BMCR
&&
453 return phy_init_hw(phydev
);
456 return phy_start_aneg(phydev
);
461 if (phydev
->drv
->hwtstamp
)
462 return phydev
->drv
->hwtstamp(phydev
, ifr
);
469 EXPORT_SYMBOL(phy_mii_ioctl
);
472 * phy_start_aneg - start auto-negotiation for this PHY device
473 * @phydev: the phy_device struct
475 * Description: Sanitizes the settings (if we're not autonegotiating
476 * them), and then calls the driver's config_aneg function.
477 * If the PHYCONTROL Layer is operating, we change the state to
478 * reflect the beginning of Auto-negotiation or forcing.
480 int phy_start_aneg(struct phy_device
*phydev
)
484 mutex_lock(&phydev
->lock
);
486 if (AUTONEG_DISABLE
== phydev
->autoneg
)
487 phy_sanitize_settings(phydev
);
489 /* Invalidate LP advertising flags */
490 phydev
->lp_advertising
= 0;
492 err
= phydev
->drv
->config_aneg(phydev
);
496 if (phydev
->state
!= PHY_HALTED
) {
497 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
498 phydev
->state
= PHY_AN
;
499 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
501 phydev
->state
= PHY_FORCING
;
502 phydev
->link_timeout
= PHY_FORCE_TIMEOUT
;
507 mutex_unlock(&phydev
->lock
);
510 EXPORT_SYMBOL(phy_start_aneg
);
513 * phy_start_machine - start PHY state machine tracking
514 * @phydev: the phy_device struct
516 * Description: The PHY infrastructure can run a state machine
517 * which tracks whether the PHY is starting up, negotiating,
518 * etc. This function starts the timer which tracks the state
519 * of the PHY. If you want to maintain your own state machine,
520 * do not call this function.
522 void phy_start_machine(struct phy_device
*phydev
)
524 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, HZ
);
528 * phy_stop_machine - stop the PHY state machine tracking
529 * @phydev: target phy_device struct
531 * Description: Stops the state machine timer, sets the state to UP
532 * (unless it wasn't up yet). This function must be called BEFORE
535 void phy_stop_machine(struct phy_device
*phydev
)
537 cancel_delayed_work_sync(&phydev
->state_queue
);
539 mutex_lock(&phydev
->lock
);
540 if (phydev
->state
> PHY_UP
)
541 phydev
->state
= PHY_UP
;
542 mutex_unlock(&phydev
->lock
);
546 * phy_error - enter HALTED state for this PHY device
547 * @phydev: target phy_device struct
549 * Moves the PHY to the HALTED state in response to a read
550 * or write error, and tells the controller the link is down.
551 * Must not be called from interrupt context, or while the
552 * phydev->lock is held.
554 static void phy_error(struct phy_device
*phydev
)
556 mutex_lock(&phydev
->lock
);
557 phydev
->state
= PHY_HALTED
;
558 mutex_unlock(&phydev
->lock
);
562 * phy_interrupt - PHY interrupt handler
563 * @irq: interrupt line
564 * @phy_dat: phy_device pointer
566 * Description: When a PHY interrupt occurs, the handler disables
567 * interrupts, and schedules a work task to clear the interrupt.
569 static irqreturn_t
phy_interrupt(int irq
, void *phy_dat
)
571 struct phy_device
*phydev
= phy_dat
;
573 if (PHY_HALTED
== phydev
->state
)
574 return IRQ_NONE
; /* It can't be ours. */
576 /* The MDIO bus is not allowed to be written in interrupt
577 * context, so we need to disable the irq here. A work
578 * queue will write the PHY to disable and clear the
579 * interrupt, and then reenable the irq line.
581 disable_irq_nosync(irq
);
582 atomic_inc(&phydev
->irq_disable
);
584 queue_work(system_power_efficient_wq
, &phydev
->phy_queue
);
590 * phy_enable_interrupts - Enable the interrupts from the PHY side
591 * @phydev: target phy_device struct
593 static int phy_enable_interrupts(struct phy_device
*phydev
)
595 int err
= phy_clear_interrupt(phydev
);
600 return phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
604 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
605 * @phydev: target phy_device struct
607 static int phy_disable_interrupts(struct phy_device
*phydev
)
611 /* Disable PHY interrupts */
612 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
616 /* Clear the interrupt */
617 err
= phy_clear_interrupt(phydev
);
630 * phy_start_interrupts - request and enable interrupts for a PHY device
631 * @phydev: target phy_device struct
633 * Description: Request the interrupt for the given PHY.
634 * If this fails, then we set irq to PHY_POLL.
635 * Otherwise, we enable the interrupts in the PHY.
636 * This should only be called with a valid IRQ number.
637 * Returns 0 on success or < 0 on error.
639 int phy_start_interrupts(struct phy_device
*phydev
)
641 atomic_set(&phydev
->irq_disable
, 0);
642 if (request_irq(phydev
->irq
, phy_interrupt
, 0, "phy_interrupt",
644 pr_warn("%s: Can't get IRQ %d (PHY)\n",
645 phydev
->bus
->name
, phydev
->irq
);
646 phydev
->irq
= PHY_POLL
;
650 return phy_enable_interrupts(phydev
);
652 EXPORT_SYMBOL(phy_start_interrupts
);
655 * phy_stop_interrupts - disable interrupts from a PHY device
656 * @phydev: target phy_device struct
658 int phy_stop_interrupts(struct phy_device
*phydev
)
660 int err
= phy_disable_interrupts(phydev
);
665 free_irq(phydev
->irq
, phydev
);
667 /* Cannot call flush_scheduled_work() here as desired because
668 * of rtnl_lock(), but we do not really care about what would
669 * be done, except from enable_irq(), so cancel any work
670 * possibly pending and take care of the matter below.
672 cancel_work_sync(&phydev
->phy_queue
);
673 /* If work indeed has been cancelled, disable_irq() will have
674 * been left unbalanced from phy_interrupt() and enable_irq()
675 * has to be called so that other devices on the line work.
677 while (atomic_dec_return(&phydev
->irq_disable
) >= 0)
678 enable_irq(phydev
->irq
);
682 EXPORT_SYMBOL(phy_stop_interrupts
);
685 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
686 * @work: work_struct that describes the work to be done
688 void phy_change(struct work_struct
*work
)
690 struct phy_device
*phydev
=
691 container_of(work
, struct phy_device
, phy_queue
);
693 if (phydev
->drv
->did_interrupt
&&
694 !phydev
->drv
->did_interrupt(phydev
))
697 if (phy_disable_interrupts(phydev
))
700 mutex_lock(&phydev
->lock
);
701 if ((PHY_RUNNING
== phydev
->state
) || (PHY_NOLINK
== phydev
->state
))
702 phydev
->state
= PHY_CHANGELINK
;
703 mutex_unlock(&phydev
->lock
);
705 atomic_dec(&phydev
->irq_disable
);
706 enable_irq(phydev
->irq
);
708 /* Reenable interrupts */
709 if (PHY_HALTED
!= phydev
->state
&&
710 phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
))
713 /* reschedule state queue work to run as soon as possible */
714 cancel_delayed_work_sync(&phydev
->state_queue
);
715 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, 0);
719 atomic_dec(&phydev
->irq_disable
);
720 enable_irq(phydev
->irq
);
724 disable_irq(phydev
->irq
);
725 atomic_inc(&phydev
->irq_disable
);
731 * phy_stop - Bring down the PHY link, and stop checking the status
732 * @phydev: target phy_device struct
734 void phy_stop(struct phy_device
*phydev
)
736 mutex_lock(&phydev
->lock
);
738 if (PHY_HALTED
== phydev
->state
)
741 if (phy_interrupt_is_valid(phydev
)) {
742 /* Disable PHY Interrupts */
743 phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
745 /* Clear any pending interrupts */
746 phy_clear_interrupt(phydev
);
749 phydev
->state
= PHY_HALTED
;
752 mutex_unlock(&phydev
->lock
);
754 /* Cannot call flush_scheduled_work() here as desired because
755 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
756 * will not reenable interrupts.
759 EXPORT_SYMBOL(phy_stop
);
762 * phy_start - start or restart a PHY device
763 * @phydev: target phy_device struct
765 * Description: Indicates the attached device's readiness to
766 * handle PHY-related work. Used during startup to start the
767 * PHY, and after a call to phy_stop() to resume operation.
768 * Also used to indicate the MDIO bus has cleared an error
771 void phy_start(struct phy_device
*phydev
)
773 bool do_resume
= false;
776 mutex_lock(&phydev
->lock
);
778 switch (phydev
->state
) {
780 phydev
->state
= PHY_PENDING
;
783 phydev
->state
= PHY_UP
;
786 /* make sure interrupts are re-enabled for the PHY */
787 err
= phy_enable_interrupts(phydev
);
791 phydev
->state
= PHY_RESUMING
;
797 mutex_unlock(&phydev
->lock
);
799 /* if phy was suspended, bring the physical link up again */
803 EXPORT_SYMBOL(phy_start
);
806 * phy_state_machine - Handle the state machine
807 * @work: work_struct that describes the work to be done
809 void phy_state_machine(struct work_struct
*work
)
811 struct delayed_work
*dwork
= to_delayed_work(work
);
812 struct phy_device
*phydev
=
813 container_of(dwork
, struct phy_device
, state_queue
);
814 bool needs_aneg
= false, do_suspend
= false;
815 enum phy_state old_state
;
819 mutex_lock(&phydev
->lock
);
821 old_state
= phydev
->state
;
823 if (phydev
->drv
->link_change_notify
)
824 phydev
->drv
->link_change_notify(phydev
);
826 switch (phydev
->state
) {
835 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
839 err
= phy_read_status(phydev
);
843 /* If the link is down, give up on negotiation for now */
845 phydev
->state
= PHY_NOLINK
;
846 netif_carrier_off(phydev
->attached_dev
);
847 phydev
->adjust_link(phydev
->attached_dev
);
851 /* Check if negotiation is done. Break if there's an error */
852 err
= phy_aneg_done(phydev
);
856 /* If AN is done, we're running */
858 phydev
->state
= PHY_RUNNING
;
859 netif_carrier_on(phydev
->attached_dev
);
860 phydev
->adjust_link(phydev
->attached_dev
);
862 } else if (0 == phydev
->link_timeout
--)
866 err
= phy_read_status(phydev
);
871 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
872 err
= phy_aneg_done(phydev
);
877 phydev
->state
= PHY_AN
;
878 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
882 phydev
->state
= PHY_RUNNING
;
883 netif_carrier_on(phydev
->attached_dev
);
884 phydev
->adjust_link(phydev
->attached_dev
);
888 err
= genphy_update_link(phydev
);
893 phydev
->state
= PHY_RUNNING
;
894 netif_carrier_on(phydev
->attached_dev
);
896 if (0 == phydev
->link_timeout
--)
900 phydev
->adjust_link(phydev
->attached_dev
);
903 /* Only register a CHANGE if we are polling or ignoring
904 * interrupts and link changed since latest checking.
906 if (!phy_interrupt_is_valid(phydev
)) {
907 old_link
= phydev
->link
;
908 err
= phy_read_status(phydev
);
912 if (old_link
!= phydev
->link
)
913 phydev
->state
= PHY_CHANGELINK
;
917 err
= phy_read_status(phydev
);
922 phydev
->state
= PHY_RUNNING
;
923 netif_carrier_on(phydev
->attached_dev
);
925 phydev
->state
= PHY_NOLINK
;
926 netif_carrier_off(phydev
->attached_dev
);
929 phydev
->adjust_link(phydev
->attached_dev
);
931 if (phy_interrupt_is_valid(phydev
))
932 err
= phy_config_interrupt(phydev
,
933 PHY_INTERRUPT_ENABLED
);
938 netif_carrier_off(phydev
->attached_dev
);
939 phydev
->adjust_link(phydev
->attached_dev
);
944 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
945 err
= phy_aneg_done(phydev
);
949 /* err > 0 if AN is done.
950 * Otherwise, it's 0, and we're still waiting for AN
953 err
= phy_read_status(phydev
);
958 phydev
->state
= PHY_RUNNING
;
959 netif_carrier_on(phydev
->attached_dev
);
961 phydev
->state
= PHY_NOLINK
;
963 phydev
->adjust_link(phydev
->attached_dev
);
965 phydev
->state
= PHY_AN
;
966 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
969 err
= phy_read_status(phydev
);
974 phydev
->state
= PHY_RUNNING
;
975 netif_carrier_on(phydev
->attached_dev
);
977 phydev
->state
= PHY_NOLINK
;
979 phydev
->adjust_link(phydev
->attached_dev
);
984 mutex_unlock(&phydev
->lock
);
987 err
= phy_start_aneg(phydev
);
994 dev_dbg(&phydev
->dev
, "PHY state change %s -> %s\n",
995 phy_state_to_str(old_state
), phy_state_to_str(phydev
->state
));
997 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
,
998 PHY_STATE_TIME
* HZ
);
1001 void phy_mac_interrupt(struct phy_device
*phydev
, int new_link
)
1003 cancel_work_sync(&phydev
->phy_queue
);
1004 phydev
->link
= new_link
;
1005 schedule_work(&phydev
->phy_queue
);
1007 EXPORT_SYMBOL(phy_mac_interrupt
);
1009 static inline void mmd_phy_indirect(struct mii_bus
*bus
, int prtad
, int devad
,
1012 /* Write the desired MMD Devad */
1013 bus
->write(bus
, addr
, MII_MMD_CTRL
, devad
);
1015 /* Write the desired MMD register address */
1016 bus
->write(bus
, addr
, MII_MMD_DATA
, prtad
);
1018 /* Select the Function : DATA with no post increment */
1019 bus
->write(bus
, addr
, MII_MMD_CTRL
, (devad
| MII_MMD_CTRL_NOINCR
));
1023 * phy_read_mmd_indirect - reads data from the MMD registers
1024 * @phydev: The PHY device bus
1025 * @prtad: MMD Address
1027 * @addr: PHY address on the MII bus
1029 * Description: it reads data from the MMD registers (clause 22 to access to
1030 * clause 45) of the specified phy address.
1031 * To read these register we have:
1032 * 1) Write reg 13 // DEVAD
1033 * 2) Write reg 14 // MMD Address
1034 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1035 * 3) Read reg 14 // Read MMD data
1037 int phy_read_mmd_indirect(struct phy_device
*phydev
, int prtad
,
1038 int devad
, int addr
)
1040 struct phy_driver
*phydrv
= phydev
->drv
;
1043 if (!phydrv
->read_mmd_indirect
) {
1044 struct mii_bus
*bus
= phydev
->bus
;
1046 mutex_lock(&bus
->mdio_lock
);
1047 mmd_phy_indirect(bus
, prtad
, devad
, addr
);
1049 /* Read the content of the MMD's selected register */
1050 value
= bus
->read(bus
, addr
, MII_MMD_DATA
);
1051 mutex_unlock(&bus
->mdio_lock
);
1053 value
= phydrv
->read_mmd_indirect(phydev
, prtad
, devad
, addr
);
1057 EXPORT_SYMBOL(phy_read_mmd_indirect
);
1060 * phy_write_mmd_indirect - writes data to the MMD registers
1061 * @phydev: The PHY device
1062 * @prtad: MMD Address
1064 * @addr: PHY address on the MII bus
1065 * @data: data to write in the MMD register
1067 * Description: Write data from the MMD registers of the specified
1069 * To write these register we have:
1070 * 1) Write reg 13 // DEVAD
1071 * 2) Write reg 14 // MMD Address
1072 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1073 * 3) Write reg 14 // Write MMD data
1075 void phy_write_mmd_indirect(struct phy_device
*phydev
, int prtad
,
1076 int devad
, int addr
, u32 data
)
1078 struct phy_driver
*phydrv
= phydev
->drv
;
1080 if (!phydrv
->write_mmd_indirect
) {
1081 struct mii_bus
*bus
= phydev
->bus
;
1083 mutex_lock(&bus
->mdio_lock
);
1084 mmd_phy_indirect(bus
, prtad
, devad
, addr
);
1086 /* Write the data into MMD's selected register */
1087 bus
->write(bus
, addr
, MII_MMD_DATA
, data
);
1088 mutex_unlock(&bus
->mdio_lock
);
1090 phydrv
->write_mmd_indirect(phydev
, prtad
, devad
, addr
, data
);
1093 EXPORT_SYMBOL(phy_write_mmd_indirect
);
1096 * phy_init_eee - init and check the EEE feature
1097 * @phydev: target phy_device struct
1098 * @clk_stop_enable: PHY may stop the clock during LPI
1100 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1101 * is supported by looking at the MMD registers 3.20 and 7.60/61
1102 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1105 int phy_init_eee(struct phy_device
*phydev
, bool clk_stop_enable
)
1107 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1108 * Also EEE feature is active when core is operating with MII, GMII
1109 * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1110 * should return an error if they do not support EEE.
1112 if ((phydev
->duplex
== DUPLEX_FULL
) &&
1113 ((phydev
->interface
== PHY_INTERFACE_MODE_MII
) ||
1114 (phydev
->interface
== PHY_INTERFACE_MODE_GMII
) ||
1115 phy_interface_is_rgmii(phydev
) ||
1116 phy_is_internal(phydev
))) {
1117 int eee_lp
, eee_cap
, eee_adv
;
1121 /* Read phy status to properly get the right settings */
1122 status
= phy_read_status(phydev
);
1126 /* First check if the EEE ability is supported */
1127 eee_cap
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1128 MDIO_MMD_PCS
, phydev
->addr
);
1132 cap
= mmd_eee_cap_to_ethtool_sup_t(eee_cap
);
1136 /* Check which link settings negotiated and verify it in
1137 * the EEE advertising registers.
1139 eee_lp
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1140 MDIO_MMD_AN
, phydev
->addr
);
1144 eee_adv
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1145 MDIO_MMD_AN
, phydev
->addr
);
1149 adv
= mmd_eee_adv_to_ethtool_adv_t(eee_adv
);
1150 lp
= mmd_eee_adv_to_ethtool_adv_t(eee_lp
);
1151 if (!phy_check_valid(phydev
->speed
, phydev
->duplex
, lp
& adv
))
1154 if (clk_stop_enable
) {
1155 /* Configure the PHY to stop receiving xMII
1156 * clock while it is signaling LPI.
1158 int val
= phy_read_mmd_indirect(phydev
, MDIO_CTRL1
,
1164 val
|= MDIO_PCS_CTRL1_CLKSTOP_EN
;
1165 phy_write_mmd_indirect(phydev
, MDIO_CTRL1
,
1166 MDIO_MMD_PCS
, phydev
->addr
,
1170 return 0; /* EEE supported */
1173 return -EPROTONOSUPPORT
;
1175 EXPORT_SYMBOL(phy_init_eee
);
1178 * phy_get_eee_err - report the EEE wake error count
1179 * @phydev: target phy_device struct
1181 * Description: it is to report the number of time where the PHY
1182 * failed to complete its normal wake sequence.
1184 int phy_get_eee_err(struct phy_device
*phydev
)
1186 return phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_WK_ERR
,
1187 MDIO_MMD_PCS
, phydev
->addr
);
1189 EXPORT_SYMBOL(phy_get_eee_err
);
1192 * phy_ethtool_get_eee - get EEE supported and status
1193 * @phydev: target phy_device struct
1194 * @data: ethtool_eee data
1196 * Description: it reportes the Supported/Advertisement/LP Advertisement
1199 int phy_ethtool_get_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1203 /* Get Supported EEE */
1204 val
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1205 MDIO_MMD_PCS
, phydev
->addr
);
1208 data
->supported
= mmd_eee_cap_to_ethtool_sup_t(val
);
1210 /* Get advertisement EEE */
1211 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1212 MDIO_MMD_AN
, phydev
->addr
);
1215 data
->advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1217 /* Get LP advertisement EEE */
1218 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1219 MDIO_MMD_AN
, phydev
->addr
);
1222 data
->lp_advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1226 EXPORT_SYMBOL(phy_ethtool_get_eee
);
1229 * phy_ethtool_set_eee - set EEE supported and status
1230 * @phydev: target phy_device struct
1231 * @data: ethtool_eee data
1233 * Description: it is to program the Advertisement EEE register.
1235 int phy_ethtool_set_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1237 int val
= ethtool_adv_to_mmd_eee_adv_t(data
->advertised
);
1239 phy_write_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
, MDIO_MMD_AN
,
1244 EXPORT_SYMBOL(phy_ethtool_set_eee
);
1246 int phy_ethtool_set_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1248 if (phydev
->drv
->set_wol
)
1249 return phydev
->drv
->set_wol(phydev
, wol
);
1253 EXPORT_SYMBOL(phy_ethtool_set_wol
);
1255 void phy_ethtool_get_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1257 if (phydev
->drv
->get_wol
)
1258 phydev
->drv
->get_wol(phydev
, wol
);
1260 EXPORT_SYMBOL(phy_ethtool_get_wol
);