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)";
62 * phy_print_status - Convenience function to print out the current phy status
63 * @phydev: the phy_device struct
65 void phy_print_status(struct phy_device
*phydev
)
68 netdev_info(phydev
->attached_dev
,
69 "Link is Up - %s/%s - flow control %s\n",
70 phy_speed_to_str(phydev
->speed
),
71 DUPLEX_FULL
== phydev
->duplex
? "Full" : "Half",
72 phydev
->pause
? "rx/tx" : "off");
74 netdev_info(phydev
->attached_dev
, "Link is Down\n");
77 EXPORT_SYMBOL(phy_print_status
);
80 * phy_clear_interrupt - Ack the phy device's interrupt
81 * @phydev: the phy_device struct
83 * If the @phydev driver has an ack_interrupt function, call it to
84 * ack and clear the phy device's interrupt.
86 * Returns 0 on success or < 0 on error.
88 static int phy_clear_interrupt(struct phy_device
*phydev
)
90 if (phydev
->drv
->ack_interrupt
)
91 return phydev
->drv
->ack_interrupt(phydev
);
97 * phy_config_interrupt - configure the PHY device for the requested interrupts
98 * @phydev: the phy_device struct
99 * @interrupts: interrupt flags to configure for this @phydev
101 * Returns 0 on success or < 0 on error.
103 static int phy_config_interrupt(struct phy_device
*phydev
, u32 interrupts
)
105 phydev
->interrupts
= interrupts
;
106 if (phydev
->drv
->config_intr
)
107 return phydev
->drv
->config_intr(phydev
);
114 * phy_aneg_done - return auto-negotiation status
115 * @phydev: target phy_device struct
117 * Description: Return the auto-negotiation status from this @phydev
118 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
121 static inline int phy_aneg_done(struct phy_device
*phydev
)
123 if (phydev
->drv
->aneg_done
)
124 return phydev
->drv
->aneg_done(phydev
);
126 return genphy_aneg_done(phydev
);
129 /* A structure for mapping a particular speed and duplex
130 * combination to a particular SUPPORTED and ADVERTISED value
138 /* A mapping of all SUPPORTED settings to speed/duplex */
139 static const struct phy_setting settings
[] = {
141 .speed
= SPEED_10000
,
142 .duplex
= DUPLEX_FULL
,
143 .setting
= SUPPORTED_10000baseKR_Full
,
146 .speed
= SPEED_10000
,
147 .duplex
= DUPLEX_FULL
,
148 .setting
= SUPPORTED_10000baseKX4_Full
,
151 .speed
= SPEED_10000
,
152 .duplex
= DUPLEX_FULL
,
153 .setting
= SUPPORTED_10000baseT_Full
,
157 .duplex
= DUPLEX_FULL
,
158 .setting
= SUPPORTED_2500baseX_Full
,
162 .duplex
= DUPLEX_FULL
,
163 .setting
= SUPPORTED_1000baseKX_Full
,
167 .duplex
= DUPLEX_FULL
,
168 .setting
= SUPPORTED_1000baseT_Full
,
172 .duplex
= DUPLEX_HALF
,
173 .setting
= SUPPORTED_1000baseT_Half
,
177 .duplex
= DUPLEX_FULL
,
178 .setting
= SUPPORTED_100baseT_Full
,
182 .duplex
= DUPLEX_HALF
,
183 .setting
= SUPPORTED_100baseT_Half
,
187 .duplex
= DUPLEX_FULL
,
188 .setting
= SUPPORTED_10baseT_Full
,
192 .duplex
= DUPLEX_HALF
,
193 .setting
= SUPPORTED_10baseT_Half
,
197 #define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
200 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
201 * @speed: speed to match
202 * @duplex: duplex to match
204 * Description: Searches the settings array for the setting which
205 * matches the desired speed and duplex, and returns the index
206 * of that setting. Returns the index of the last setting if
207 * none of the others match.
209 static inline unsigned int phy_find_setting(int speed
, int duplex
)
211 unsigned int idx
= 0;
213 while (idx
< ARRAY_SIZE(settings
) &&
214 (settings
[idx
].speed
!= speed
|| settings
[idx
].duplex
!= duplex
))
217 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
221 * phy_find_valid - find a PHY setting that matches the requested features mask
222 * @idx: The first index in settings[] to search
223 * @features: A mask of the valid settings
225 * Description: Returns the index of the first valid setting less
226 * than or equal to the one pointed to by idx, as determined by
227 * the mask in features. Returns the index of the last setting
228 * if nothing else matches.
230 static inline unsigned int phy_find_valid(unsigned int idx
, u32 features
)
232 while (idx
< MAX_NUM_SETTINGS
&& !(settings
[idx
].setting
& features
))
235 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
239 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
240 * @phydev: the target phy_device struct
242 * Description: Make sure the PHY is set to supported speeds and
243 * duplexes. Drop down by one in this order: 1000/FULL,
244 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
246 static void phy_sanitize_settings(struct phy_device
*phydev
)
248 u32 features
= phydev
->supported
;
251 /* Sanitize settings based on PHY capabilities */
252 if ((features
& SUPPORTED_Autoneg
) == 0)
253 phydev
->autoneg
= AUTONEG_DISABLE
;
255 idx
= phy_find_valid(phy_find_setting(phydev
->speed
, phydev
->duplex
),
258 phydev
->speed
= settings
[idx
].speed
;
259 phydev
->duplex
= settings
[idx
].duplex
;
263 * phy_ethtool_sset - generic ethtool sset function, handles all the details
264 * @phydev: target phy_device struct
267 * A few notes about parameter checking:
268 * - We don't set port or transceiver, so we don't care what they
270 * - phy_start_aneg() will make sure forced settings are sane, and
271 * choose the next best ones from the ones selected, so we don't
272 * care if ethtool tries to give us bad values.
274 int phy_ethtool_sset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
276 u32 speed
= ethtool_cmd_speed(cmd
);
278 if (cmd
->phy_address
!= phydev
->addr
)
281 /* We make sure that we don't pass unsupported values in to the PHY */
282 cmd
->advertising
&= phydev
->supported
;
284 /* Verify the settings we care about. */
285 if (cmd
->autoneg
!= AUTONEG_ENABLE
&& cmd
->autoneg
!= AUTONEG_DISABLE
)
288 if (cmd
->autoneg
== AUTONEG_ENABLE
&& cmd
->advertising
== 0)
291 if (cmd
->autoneg
== AUTONEG_DISABLE
&&
292 ((speed
!= SPEED_1000
&&
293 speed
!= SPEED_100
&&
294 speed
!= SPEED_10
) ||
295 (cmd
->duplex
!= DUPLEX_HALF
&&
296 cmd
->duplex
!= DUPLEX_FULL
)))
299 phydev
->autoneg
= cmd
->autoneg
;
301 phydev
->speed
= speed
;
303 phydev
->advertising
= cmd
->advertising
;
305 if (AUTONEG_ENABLE
== cmd
->autoneg
)
306 phydev
->advertising
|= ADVERTISED_Autoneg
;
308 phydev
->advertising
&= ~ADVERTISED_Autoneg
;
310 phydev
->duplex
= cmd
->duplex
;
312 /* Restart the PHY */
313 phy_start_aneg(phydev
);
317 EXPORT_SYMBOL(phy_ethtool_sset
);
319 int phy_ethtool_gset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
321 cmd
->supported
= phydev
->supported
;
323 cmd
->advertising
= phydev
->advertising
;
324 cmd
->lp_advertising
= phydev
->lp_advertising
;
326 ethtool_cmd_speed_set(cmd
, phydev
->speed
);
327 cmd
->duplex
= phydev
->duplex
;
328 if (phydev
->interface
== PHY_INTERFACE_MODE_MOCA
)
329 cmd
->port
= PORT_BNC
;
331 cmd
->port
= PORT_MII
;
332 cmd
->phy_address
= phydev
->addr
;
333 cmd
->transceiver
= phy_is_internal(phydev
) ?
334 XCVR_INTERNAL
: XCVR_EXTERNAL
;
335 cmd
->autoneg
= phydev
->autoneg
;
339 EXPORT_SYMBOL(phy_ethtool_gset
);
342 * phy_mii_ioctl - generic PHY MII ioctl interface
343 * @phydev: the phy_device struct
344 * @ifr: &struct ifreq for socket ioctl's
345 * @cmd: ioctl cmd to execute
347 * Note that this function is currently incompatible with the
348 * PHYCONTROL layer. It changes registers without regard to
349 * current state. Use at own risk.
351 int phy_mii_ioctl(struct phy_device
*phydev
, struct ifreq
*ifr
, int cmd
)
353 struct mii_ioctl_data
*mii_data
= if_mii(ifr
);
354 u16 val
= mii_data
->val_in
;
358 mii_data
->phy_id
= phydev
->addr
;
362 mii_data
->val_out
= mdiobus_read(phydev
->bus
, mii_data
->phy_id
,
367 if (mii_data
->phy_id
== phydev
->addr
) {
368 switch (mii_data
->reg_num
) {
370 if ((val
& (BMCR_RESET
| BMCR_ANENABLE
)) == 0)
371 phydev
->autoneg
= AUTONEG_DISABLE
;
373 phydev
->autoneg
= AUTONEG_ENABLE
;
374 if (!phydev
->autoneg
&& (val
& BMCR_FULLDPLX
))
375 phydev
->duplex
= DUPLEX_FULL
;
377 phydev
->duplex
= DUPLEX_HALF
;
378 if (!phydev
->autoneg
&& (val
& BMCR_SPEED1000
))
379 phydev
->speed
= SPEED_1000
;
380 else if (!phydev
->autoneg
&&
381 (val
& BMCR_SPEED100
))
382 phydev
->speed
= SPEED_100
;
385 phydev
->advertising
= val
;
393 mdiobus_write(phydev
->bus
, mii_data
->phy_id
,
394 mii_data
->reg_num
, val
);
396 if (mii_data
->reg_num
== MII_BMCR
&&
398 return phy_init_hw(phydev
);
402 if (phydev
->drv
->hwtstamp
)
403 return phydev
->drv
->hwtstamp(phydev
, ifr
);
410 EXPORT_SYMBOL(phy_mii_ioctl
);
413 * phy_start_aneg - start auto-negotiation for this PHY device
414 * @phydev: the phy_device struct
416 * Description: Sanitizes the settings (if we're not autonegotiating
417 * them), and then calls the driver's config_aneg function.
418 * If the PHYCONTROL Layer is operating, we change the state to
419 * reflect the beginning of Auto-negotiation or forcing.
421 int phy_start_aneg(struct phy_device
*phydev
)
425 mutex_lock(&phydev
->lock
);
427 if (AUTONEG_DISABLE
== phydev
->autoneg
)
428 phy_sanitize_settings(phydev
);
430 err
= phydev
->drv
->config_aneg(phydev
);
434 if (phydev
->state
!= PHY_HALTED
) {
435 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
436 phydev
->state
= PHY_AN
;
437 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
439 phydev
->state
= PHY_FORCING
;
440 phydev
->link_timeout
= PHY_FORCE_TIMEOUT
;
445 mutex_unlock(&phydev
->lock
);
448 EXPORT_SYMBOL(phy_start_aneg
);
451 * phy_start_machine - start PHY state machine tracking
452 * @phydev: the phy_device struct
454 * Description: The PHY infrastructure can run a state machine
455 * which tracks whether the PHY is starting up, negotiating,
456 * etc. This function starts the timer which tracks the state
457 * of the PHY. If you want to maintain your own state machine,
458 * do not call this function.
460 void phy_start_machine(struct phy_device
*phydev
)
462 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, HZ
);
466 * phy_stop_machine - stop the PHY state machine tracking
467 * @phydev: target phy_device struct
469 * Description: Stops the state machine timer, sets the state to UP
470 * (unless it wasn't up yet). This function must be called BEFORE
473 void phy_stop_machine(struct phy_device
*phydev
)
475 cancel_delayed_work_sync(&phydev
->state_queue
);
477 mutex_lock(&phydev
->lock
);
478 if (phydev
->state
> PHY_UP
)
479 phydev
->state
= PHY_UP
;
480 mutex_unlock(&phydev
->lock
);
484 * phy_error - enter HALTED state for this PHY device
485 * @phydev: target phy_device struct
487 * Moves the PHY to the HALTED state in response to a read
488 * or write error, and tells the controller the link is down.
489 * Must not be called from interrupt context, or while the
490 * phydev->lock is held.
492 static void phy_error(struct phy_device
*phydev
)
494 mutex_lock(&phydev
->lock
);
495 phydev
->state
= PHY_HALTED
;
496 mutex_unlock(&phydev
->lock
);
500 * phy_interrupt - PHY interrupt handler
501 * @irq: interrupt line
502 * @phy_dat: phy_device pointer
504 * Description: When a PHY interrupt occurs, the handler disables
505 * interrupts, and schedules a work task to clear the interrupt.
507 static irqreturn_t
phy_interrupt(int irq
, void *phy_dat
)
509 struct phy_device
*phydev
= phy_dat
;
511 if (PHY_HALTED
== phydev
->state
)
512 return IRQ_NONE
; /* It can't be ours. */
514 /* The MDIO bus is not allowed to be written in interrupt
515 * context, so we need to disable the irq here. A work
516 * queue will write the PHY to disable and clear the
517 * interrupt, and then reenable the irq line.
519 disable_irq_nosync(irq
);
520 atomic_inc(&phydev
->irq_disable
);
522 queue_work(system_power_efficient_wq
, &phydev
->phy_queue
);
528 * phy_enable_interrupts - Enable the interrupts from the PHY side
529 * @phydev: target phy_device struct
531 static int phy_enable_interrupts(struct phy_device
*phydev
)
533 int err
= phy_clear_interrupt(phydev
);
538 return phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
542 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
543 * @phydev: target phy_device struct
545 static int phy_disable_interrupts(struct phy_device
*phydev
)
549 /* Disable PHY interrupts */
550 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
554 /* Clear the interrupt */
555 err
= phy_clear_interrupt(phydev
);
568 * phy_start_interrupts - request and enable interrupts for a PHY device
569 * @phydev: target phy_device struct
571 * Description: Request the interrupt for the given PHY.
572 * If this fails, then we set irq to PHY_POLL.
573 * Otherwise, we enable the interrupts in the PHY.
574 * This should only be called with a valid IRQ number.
575 * Returns 0 on success or < 0 on error.
577 int phy_start_interrupts(struct phy_device
*phydev
)
579 atomic_set(&phydev
->irq_disable
, 0);
580 if (request_irq(phydev
->irq
, phy_interrupt
, 0, "phy_interrupt",
582 pr_warn("%s: Can't get IRQ %d (PHY)\n",
583 phydev
->bus
->name
, phydev
->irq
);
584 phydev
->irq
= PHY_POLL
;
588 return phy_enable_interrupts(phydev
);
590 EXPORT_SYMBOL(phy_start_interrupts
);
593 * phy_stop_interrupts - disable interrupts from a PHY device
594 * @phydev: target phy_device struct
596 int phy_stop_interrupts(struct phy_device
*phydev
)
598 int err
= phy_disable_interrupts(phydev
);
603 free_irq(phydev
->irq
, phydev
);
605 /* Cannot call flush_scheduled_work() here as desired because
606 * of rtnl_lock(), but we do not really care about what would
607 * be done, except from enable_irq(), so cancel any work
608 * possibly pending and take care of the matter below.
610 cancel_work_sync(&phydev
->phy_queue
);
611 /* If work indeed has been cancelled, disable_irq() will have
612 * been left unbalanced from phy_interrupt() and enable_irq()
613 * has to be called so that other devices on the line work.
615 while (atomic_dec_return(&phydev
->irq_disable
) >= 0)
616 enable_irq(phydev
->irq
);
620 EXPORT_SYMBOL(phy_stop_interrupts
);
623 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
624 * @work: work_struct that describes the work to be done
626 void phy_change(struct work_struct
*work
)
628 struct phy_device
*phydev
=
629 container_of(work
, struct phy_device
, phy_queue
);
631 if (phydev
->drv
->did_interrupt
&&
632 !phydev
->drv
->did_interrupt(phydev
))
635 if (phy_disable_interrupts(phydev
))
638 mutex_lock(&phydev
->lock
);
639 if ((PHY_RUNNING
== phydev
->state
) || (PHY_NOLINK
== phydev
->state
))
640 phydev
->state
= PHY_CHANGELINK
;
641 mutex_unlock(&phydev
->lock
);
643 atomic_dec(&phydev
->irq_disable
);
644 enable_irq(phydev
->irq
);
646 /* Reenable interrupts */
647 if (PHY_HALTED
!= phydev
->state
&&
648 phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
))
651 /* reschedule state queue work to run as soon as possible */
652 cancel_delayed_work_sync(&phydev
->state_queue
);
653 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, 0);
657 atomic_dec(&phydev
->irq_disable
);
658 enable_irq(phydev
->irq
);
662 disable_irq(phydev
->irq
);
663 atomic_inc(&phydev
->irq_disable
);
669 * phy_stop - Bring down the PHY link, and stop checking the status
670 * @phydev: target phy_device struct
672 void phy_stop(struct phy_device
*phydev
)
674 mutex_lock(&phydev
->lock
);
676 if (PHY_HALTED
== phydev
->state
)
679 if (phy_interrupt_is_valid(phydev
)) {
680 /* Disable PHY Interrupts */
681 phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
683 /* Clear any pending interrupts */
684 phy_clear_interrupt(phydev
);
687 phydev
->state
= PHY_HALTED
;
690 mutex_unlock(&phydev
->lock
);
692 /* Cannot call flush_scheduled_work() here as desired because
693 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
694 * will not reenable interrupts.
697 EXPORT_SYMBOL(phy_stop
);
700 * phy_start - start or restart a PHY device
701 * @phydev: target phy_device struct
703 * Description: Indicates the attached device's readiness to
704 * handle PHY-related work. Used during startup to start the
705 * PHY, and after a call to phy_stop() to resume operation.
706 * Also used to indicate the MDIO bus has cleared an error
709 void phy_start(struct phy_device
*phydev
)
711 mutex_lock(&phydev
->lock
);
713 switch (phydev
->state
) {
715 phydev
->state
= PHY_PENDING
;
718 phydev
->state
= PHY_UP
;
721 phydev
->state
= PHY_RESUMING
;
725 mutex_unlock(&phydev
->lock
);
727 EXPORT_SYMBOL(phy_start
);
730 * phy_state_machine - Handle the state machine
731 * @work: work_struct that describes the work to be done
733 void phy_state_machine(struct work_struct
*work
)
735 struct delayed_work
*dwork
= to_delayed_work(work
);
736 struct phy_device
*phydev
=
737 container_of(dwork
, struct phy_device
, state_queue
);
738 bool needs_aneg
= false, do_suspend
= false, do_resume
= false;
741 mutex_lock(&phydev
->lock
);
743 if (phydev
->drv
->link_change_notify
)
744 phydev
->drv
->link_change_notify(phydev
);
746 switch (phydev
->state
) {
755 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
759 err
= phy_read_status(phydev
);
763 /* If the link is down, give up on negotiation for now */
765 phydev
->state
= PHY_NOLINK
;
766 netif_carrier_off(phydev
->attached_dev
);
767 phydev
->adjust_link(phydev
->attached_dev
);
771 /* Check if negotiation is done. Break if there's an error */
772 err
= phy_aneg_done(phydev
);
776 /* If AN is done, we're running */
778 phydev
->state
= PHY_RUNNING
;
779 netif_carrier_on(phydev
->attached_dev
);
780 phydev
->adjust_link(phydev
->attached_dev
);
782 } else if (0 == phydev
->link_timeout
--)
786 err
= phy_read_status(phydev
);
791 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
792 err
= phy_aneg_done(phydev
);
797 phydev
->state
= PHY_AN
;
798 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
802 phydev
->state
= PHY_RUNNING
;
803 netif_carrier_on(phydev
->attached_dev
);
804 phydev
->adjust_link(phydev
->attached_dev
);
808 err
= genphy_update_link(phydev
);
813 phydev
->state
= PHY_RUNNING
;
814 netif_carrier_on(phydev
->attached_dev
);
816 if (0 == phydev
->link_timeout
--)
820 phydev
->adjust_link(phydev
->attached_dev
);
823 /* Only register a CHANGE if we are
824 * polling or ignoring interrupts
826 if (!phy_interrupt_is_valid(phydev
))
827 phydev
->state
= PHY_CHANGELINK
;
830 err
= phy_read_status(phydev
);
835 phydev
->state
= PHY_RUNNING
;
836 netif_carrier_on(phydev
->attached_dev
);
838 phydev
->state
= PHY_NOLINK
;
839 netif_carrier_off(phydev
->attached_dev
);
842 phydev
->adjust_link(phydev
->attached_dev
);
844 if (phy_interrupt_is_valid(phydev
))
845 err
= phy_config_interrupt(phydev
,
846 PHY_INTERRUPT_ENABLED
);
851 netif_carrier_off(phydev
->attached_dev
);
852 phydev
->adjust_link(phydev
->attached_dev
);
857 err
= phy_clear_interrupt(phydev
);
861 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
865 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
866 err
= phy_aneg_done(phydev
);
870 /* err > 0 if AN is done.
871 * Otherwise, it's 0, and we're still waiting for AN
874 err
= phy_read_status(phydev
);
879 phydev
->state
= PHY_RUNNING
;
880 netif_carrier_on(phydev
->attached_dev
);
882 phydev
->state
= PHY_NOLINK
;
884 phydev
->adjust_link(phydev
->attached_dev
);
886 phydev
->state
= PHY_AN
;
887 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
890 err
= phy_read_status(phydev
);
895 phydev
->state
= PHY_RUNNING
;
896 netif_carrier_on(phydev
->attached_dev
);
898 phydev
->state
= PHY_NOLINK
;
900 phydev
->adjust_link(phydev
->attached_dev
);
906 mutex_unlock(&phydev
->lock
);
909 err
= phy_start_aneg(phydev
);
918 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
,
919 PHY_STATE_TIME
* HZ
);
922 void phy_mac_interrupt(struct phy_device
*phydev
, int new_link
)
924 cancel_work_sync(&phydev
->phy_queue
);
925 phydev
->link
= new_link
;
926 schedule_work(&phydev
->phy_queue
);
928 EXPORT_SYMBOL(phy_mac_interrupt
);
930 static inline void mmd_phy_indirect(struct mii_bus
*bus
, int prtad
, int devad
,
933 /* Write the desired MMD Devad */
934 bus
->write(bus
, addr
, MII_MMD_CTRL
, devad
);
936 /* Write the desired MMD register address */
937 bus
->write(bus
, addr
, MII_MMD_DATA
, prtad
);
939 /* Select the Function : DATA with no post increment */
940 bus
->write(bus
, addr
, MII_MMD_CTRL
, (devad
| MII_MMD_CTRL_NOINCR
));
944 * phy_read_mmd_indirect - reads data from the MMD registers
945 * @phydev: The PHY device bus
946 * @prtad: MMD Address
948 * @addr: PHY address on the MII bus
950 * Description: it reads data from the MMD registers (clause 22 to access to
951 * clause 45) of the specified phy address.
952 * To read these register we have:
953 * 1) Write reg 13 // DEVAD
954 * 2) Write reg 14 // MMD Address
955 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
956 * 3) Read reg 14 // Read MMD data
958 static int phy_read_mmd_indirect(struct phy_device
*phydev
, int prtad
,
961 struct phy_driver
*phydrv
= phydev
->drv
;
964 if (phydrv
->read_mmd_indirect
== NULL
) {
965 mmd_phy_indirect(phydev
->bus
, prtad
, devad
, addr
);
967 /* Read the content of the MMD's selected register */
968 value
= phydev
->bus
->read(phydev
->bus
, addr
, MII_MMD_DATA
);
970 value
= phydrv
->read_mmd_indirect(phydev
, prtad
, devad
, addr
);
976 * phy_write_mmd_indirect - writes data to the MMD registers
977 * @phydev: The PHY device
978 * @prtad: MMD Address
980 * @addr: PHY address on the MII bus
981 * @data: data to write in the MMD register
983 * Description: Write data from the MMD registers of the specified
985 * To write these register we have:
986 * 1) Write reg 13 // DEVAD
987 * 2) Write reg 14 // MMD Address
988 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
989 * 3) Write reg 14 // Write MMD data
991 static void phy_write_mmd_indirect(struct phy_device
*phydev
, int prtad
,
992 int devad
, int addr
, u32 data
)
994 struct phy_driver
*phydrv
= phydev
->drv
;
996 if (phydrv
->write_mmd_indirect
== NULL
) {
997 mmd_phy_indirect(phydev
->bus
, prtad
, devad
, addr
);
999 /* Write the data into MMD's selected register */
1000 phydev
->bus
->write(phydev
->bus
, addr
, MII_MMD_DATA
, data
);
1002 phydrv
->write_mmd_indirect(phydev
, prtad
, devad
, addr
, data
);
1007 * phy_init_eee - init and check the EEE feature
1008 * @phydev: target phy_device struct
1009 * @clk_stop_enable: PHY may stop the clock during LPI
1011 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1012 * is supported by looking at the MMD registers 3.20 and 7.60/61
1013 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1016 int phy_init_eee(struct phy_device
*phydev
, bool clk_stop_enable
)
1018 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1019 * Also EEE feature is active when core is operating with MII, GMII
1022 if ((phydev
->duplex
== DUPLEX_FULL
) &&
1023 ((phydev
->interface
== PHY_INTERFACE_MODE_MII
) ||
1024 (phydev
->interface
== PHY_INTERFACE_MODE_GMII
) ||
1025 (phydev
->interface
== PHY_INTERFACE_MODE_RGMII
))) {
1026 int eee_lp
, eee_cap
, eee_adv
;
1031 /* Read phy status to properly get the right settings */
1032 status
= phy_read_status(phydev
);
1036 /* First check if the EEE ability is supported */
1037 eee_cap
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1038 MDIO_MMD_PCS
, phydev
->addr
);
1042 cap
= mmd_eee_cap_to_ethtool_sup_t(eee_cap
);
1044 return -EPROTONOSUPPORT
;
1046 /* Check which link settings negotiated and verify it in
1047 * the EEE advertising registers.
1049 eee_lp
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1050 MDIO_MMD_AN
, phydev
->addr
);
1054 eee_adv
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1055 MDIO_MMD_AN
, phydev
->addr
);
1059 adv
= mmd_eee_adv_to_ethtool_adv_t(eee_adv
);
1060 lp
= mmd_eee_adv_to_ethtool_adv_t(eee_lp
);
1061 idx
= phy_find_setting(phydev
->speed
, phydev
->duplex
);
1062 if (!(lp
& adv
& settings
[idx
].setting
))
1063 return -EPROTONOSUPPORT
;
1065 if (clk_stop_enable
) {
1066 /* Configure the PHY to stop receiving xMII
1067 * clock while it is signaling LPI.
1069 int val
= phy_read_mmd_indirect(phydev
, MDIO_CTRL1
,
1075 val
|= MDIO_PCS_CTRL1_CLKSTOP_EN
;
1076 phy_write_mmd_indirect(phydev
, MDIO_CTRL1
,
1077 MDIO_MMD_PCS
, phydev
->addr
,
1081 return 0; /* EEE supported */
1084 return -EPROTONOSUPPORT
;
1086 EXPORT_SYMBOL(phy_init_eee
);
1089 * phy_get_eee_err - report the EEE wake error count
1090 * @phydev: target phy_device struct
1092 * Description: it is to report the number of time where the PHY
1093 * failed to complete its normal wake sequence.
1095 int phy_get_eee_err(struct phy_device
*phydev
)
1097 return phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_WK_ERR
,
1098 MDIO_MMD_PCS
, phydev
->addr
);
1100 EXPORT_SYMBOL(phy_get_eee_err
);
1103 * phy_ethtool_get_eee - get EEE supported and status
1104 * @phydev: target phy_device struct
1105 * @data: ethtool_eee data
1107 * Description: it reportes the Supported/Advertisement/LP Advertisement
1110 int phy_ethtool_get_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1114 /* Get Supported EEE */
1115 val
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1116 MDIO_MMD_PCS
, phydev
->addr
);
1119 data
->supported
= mmd_eee_cap_to_ethtool_sup_t(val
);
1121 /* Get advertisement EEE */
1122 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1123 MDIO_MMD_AN
, phydev
->addr
);
1126 data
->advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1128 /* Get LP advertisement EEE */
1129 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1130 MDIO_MMD_AN
, phydev
->addr
);
1133 data
->lp_advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1137 EXPORT_SYMBOL(phy_ethtool_get_eee
);
1140 * phy_ethtool_set_eee - set EEE supported and status
1141 * @phydev: target phy_device struct
1142 * @data: ethtool_eee data
1144 * Description: it is to program the Advertisement EEE register.
1146 int phy_ethtool_set_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1148 int val
= ethtool_adv_to_mmd_eee_adv_t(data
->advertised
);
1150 phy_write_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
, MDIO_MMD_AN
,
1155 EXPORT_SYMBOL(phy_ethtool_set_eee
);
1157 int phy_ethtool_set_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1159 if (phydev
->drv
->set_wol
)
1160 return phydev
->drv
->set_wol(phydev
, wol
);
1164 EXPORT_SYMBOL(phy_ethtool_set_wol
);
1166 void phy_ethtool_get_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1168 if (phydev
->drv
->get_wol
)
1169 phydev
->drv
->get_wol(phydev
, wol
);
1171 EXPORT_SYMBOL(phy_ethtool_get_wol
);