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
;
355 bool change_autoneg
= false;
359 mii_data
->phy_id
= phydev
->addr
;
363 mii_data
->val_out
= mdiobus_read(phydev
->bus
, mii_data
->phy_id
,
368 if (mii_data
->phy_id
== phydev
->addr
) {
369 switch (mii_data
->reg_num
) {
371 if ((val
& (BMCR_RESET
| BMCR_ANENABLE
)) == 0) {
372 if (phydev
->autoneg
== AUTONEG_ENABLE
)
373 change_autoneg
= true;
374 phydev
->autoneg
= AUTONEG_DISABLE
;
375 if (val
& BMCR_FULLDPLX
)
376 phydev
->duplex
= DUPLEX_FULL
;
378 phydev
->duplex
= DUPLEX_HALF
;
379 if (val
& BMCR_SPEED1000
)
380 phydev
->speed
= SPEED_1000
;
381 else if (val
& BMCR_SPEED100
)
382 phydev
->speed
= SPEED_100
;
383 else phydev
->speed
= SPEED_10
;
386 if (phydev
->autoneg
== AUTONEG_DISABLE
)
387 change_autoneg
= true;
388 phydev
->autoneg
= AUTONEG_ENABLE
;
392 phydev
->advertising
= mii_adv_to_ethtool_adv_t(val
);
393 change_autoneg
= true;
401 mdiobus_write(phydev
->bus
, mii_data
->phy_id
,
402 mii_data
->reg_num
, val
);
404 if (mii_data
->reg_num
== MII_BMCR
&&
406 return phy_init_hw(phydev
);
409 return phy_start_aneg(phydev
);
414 if (phydev
->drv
->hwtstamp
)
415 return phydev
->drv
->hwtstamp(phydev
, ifr
);
422 EXPORT_SYMBOL(phy_mii_ioctl
);
425 * phy_start_aneg - start auto-negotiation for this PHY device
426 * @phydev: the phy_device struct
428 * Description: Sanitizes the settings (if we're not autonegotiating
429 * them), and then calls the driver's config_aneg function.
430 * If the PHYCONTROL Layer is operating, we change the state to
431 * reflect the beginning of Auto-negotiation or forcing.
433 int phy_start_aneg(struct phy_device
*phydev
)
437 mutex_lock(&phydev
->lock
);
439 if (AUTONEG_DISABLE
== phydev
->autoneg
)
440 phy_sanitize_settings(phydev
);
442 /* Invalidate LP advertising flags */
443 phydev
->lp_advertising
= 0;
445 err
= phydev
->drv
->config_aneg(phydev
);
449 if (phydev
->state
!= PHY_HALTED
) {
450 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
451 phydev
->state
= PHY_AN
;
452 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
454 phydev
->state
= PHY_FORCING
;
455 phydev
->link_timeout
= PHY_FORCE_TIMEOUT
;
460 mutex_unlock(&phydev
->lock
);
463 EXPORT_SYMBOL(phy_start_aneg
);
466 * phy_start_machine - start PHY state machine tracking
467 * @phydev: the phy_device struct
469 * Description: The PHY infrastructure can run a state machine
470 * which tracks whether the PHY is starting up, negotiating,
471 * etc. This function starts the timer which tracks the state
472 * of the PHY. If you want to maintain your own state machine,
473 * do not call this function.
475 void phy_start_machine(struct phy_device
*phydev
)
477 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, HZ
);
481 * phy_stop_machine - stop the PHY state machine tracking
482 * @phydev: target phy_device struct
484 * Description: Stops the state machine timer, sets the state to UP
485 * (unless it wasn't up yet). This function must be called BEFORE
488 void phy_stop_machine(struct phy_device
*phydev
)
490 cancel_delayed_work_sync(&phydev
->state_queue
);
492 mutex_lock(&phydev
->lock
);
493 if (phydev
->state
> PHY_UP
)
494 phydev
->state
= PHY_UP
;
495 mutex_unlock(&phydev
->lock
);
499 * phy_error - enter HALTED state for this PHY device
500 * @phydev: target phy_device struct
502 * Moves the PHY to the HALTED state in response to a read
503 * or write error, and tells the controller the link is down.
504 * Must not be called from interrupt context, or while the
505 * phydev->lock is held.
507 static void phy_error(struct phy_device
*phydev
)
509 mutex_lock(&phydev
->lock
);
510 phydev
->state
= PHY_HALTED
;
511 mutex_unlock(&phydev
->lock
);
515 * phy_interrupt - PHY interrupt handler
516 * @irq: interrupt line
517 * @phy_dat: phy_device pointer
519 * Description: When a PHY interrupt occurs, the handler disables
520 * interrupts, and schedules a work task to clear the interrupt.
522 static irqreturn_t
phy_interrupt(int irq
, void *phy_dat
)
524 struct phy_device
*phydev
= phy_dat
;
526 if (PHY_HALTED
== phydev
->state
)
527 return IRQ_NONE
; /* It can't be ours. */
529 /* The MDIO bus is not allowed to be written in interrupt
530 * context, so we need to disable the irq here. A work
531 * queue will write the PHY to disable and clear the
532 * interrupt, and then reenable the irq line.
534 disable_irq_nosync(irq
);
535 atomic_inc(&phydev
->irq_disable
);
537 queue_work(system_power_efficient_wq
, &phydev
->phy_queue
);
543 * phy_enable_interrupts - Enable the interrupts from the PHY side
544 * @phydev: target phy_device struct
546 static int phy_enable_interrupts(struct phy_device
*phydev
)
548 int err
= phy_clear_interrupt(phydev
);
553 return phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
557 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
558 * @phydev: target phy_device struct
560 static int phy_disable_interrupts(struct phy_device
*phydev
)
564 /* Disable PHY interrupts */
565 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
569 /* Clear the interrupt */
570 err
= phy_clear_interrupt(phydev
);
583 * phy_start_interrupts - request and enable interrupts for a PHY device
584 * @phydev: target phy_device struct
586 * Description: Request the interrupt for the given PHY.
587 * If this fails, then we set irq to PHY_POLL.
588 * Otherwise, we enable the interrupts in the PHY.
589 * This should only be called with a valid IRQ number.
590 * Returns 0 on success or < 0 on error.
592 int phy_start_interrupts(struct phy_device
*phydev
)
594 atomic_set(&phydev
->irq_disable
, 0);
595 if (request_irq(phydev
->irq
, phy_interrupt
, 0, "phy_interrupt",
597 pr_warn("%s: Can't get IRQ %d (PHY)\n",
598 phydev
->bus
->name
, phydev
->irq
);
599 phydev
->irq
= PHY_POLL
;
603 return phy_enable_interrupts(phydev
);
605 EXPORT_SYMBOL(phy_start_interrupts
);
608 * phy_stop_interrupts - disable interrupts from a PHY device
609 * @phydev: target phy_device struct
611 int phy_stop_interrupts(struct phy_device
*phydev
)
613 int err
= phy_disable_interrupts(phydev
);
618 free_irq(phydev
->irq
, phydev
);
620 /* Cannot call flush_scheduled_work() here as desired because
621 * of rtnl_lock(), but we do not really care about what would
622 * be done, except from enable_irq(), so cancel any work
623 * possibly pending and take care of the matter below.
625 cancel_work_sync(&phydev
->phy_queue
);
626 /* If work indeed has been cancelled, disable_irq() will have
627 * been left unbalanced from phy_interrupt() and enable_irq()
628 * has to be called so that other devices on the line work.
630 while (atomic_dec_return(&phydev
->irq_disable
) >= 0)
631 enable_irq(phydev
->irq
);
635 EXPORT_SYMBOL(phy_stop_interrupts
);
638 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
639 * @work: work_struct that describes the work to be done
641 void phy_change(struct work_struct
*work
)
643 struct phy_device
*phydev
=
644 container_of(work
, struct phy_device
, phy_queue
);
646 if (phydev
->drv
->did_interrupt
&&
647 !phydev
->drv
->did_interrupt(phydev
))
650 if (phy_disable_interrupts(phydev
))
653 mutex_lock(&phydev
->lock
);
654 if ((PHY_RUNNING
== phydev
->state
) || (PHY_NOLINK
== phydev
->state
))
655 phydev
->state
= PHY_CHANGELINK
;
656 mutex_unlock(&phydev
->lock
);
658 atomic_dec(&phydev
->irq_disable
);
659 enable_irq(phydev
->irq
);
661 /* Reenable interrupts */
662 if (PHY_HALTED
!= phydev
->state
&&
663 phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
))
666 /* reschedule state queue work to run as soon as possible */
667 cancel_delayed_work_sync(&phydev
->state_queue
);
668 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, 0);
672 atomic_dec(&phydev
->irq_disable
);
673 enable_irq(phydev
->irq
);
677 disable_irq(phydev
->irq
);
678 atomic_inc(&phydev
->irq_disable
);
684 * phy_stop - Bring down the PHY link, and stop checking the status
685 * @phydev: target phy_device struct
687 void phy_stop(struct phy_device
*phydev
)
689 mutex_lock(&phydev
->lock
);
691 if (PHY_HALTED
== phydev
->state
)
694 if (phy_interrupt_is_valid(phydev
)) {
695 /* Disable PHY Interrupts */
696 phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
698 /* Clear any pending interrupts */
699 phy_clear_interrupt(phydev
);
702 phydev
->state
= PHY_HALTED
;
705 mutex_unlock(&phydev
->lock
);
707 /* Cannot call flush_scheduled_work() here as desired because
708 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
709 * will not reenable interrupts.
712 EXPORT_SYMBOL(phy_stop
);
715 * phy_start - start or restart a PHY device
716 * @phydev: target phy_device struct
718 * Description: Indicates the attached device's readiness to
719 * handle PHY-related work. Used during startup to start the
720 * PHY, and after a call to phy_stop() to resume operation.
721 * Also used to indicate the MDIO bus has cleared an error
724 void phy_start(struct phy_device
*phydev
)
726 mutex_lock(&phydev
->lock
);
728 switch (phydev
->state
) {
730 phydev
->state
= PHY_PENDING
;
733 phydev
->state
= PHY_UP
;
736 phydev
->state
= PHY_RESUMING
;
740 mutex_unlock(&phydev
->lock
);
742 EXPORT_SYMBOL(phy_start
);
745 * phy_state_machine - Handle the state machine
746 * @work: work_struct that describes the work to be done
748 void phy_state_machine(struct work_struct
*work
)
750 struct delayed_work
*dwork
= to_delayed_work(work
);
751 struct phy_device
*phydev
=
752 container_of(dwork
, struct phy_device
, state_queue
);
753 bool needs_aneg
= false, do_suspend
= false, do_resume
= false;
756 mutex_lock(&phydev
->lock
);
758 if (phydev
->drv
->link_change_notify
)
759 phydev
->drv
->link_change_notify(phydev
);
761 switch (phydev
->state
) {
770 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
774 err
= phy_read_status(phydev
);
778 /* If the link is down, give up on negotiation for now */
780 phydev
->state
= PHY_NOLINK
;
781 netif_carrier_off(phydev
->attached_dev
);
782 phydev
->adjust_link(phydev
->attached_dev
);
786 /* Check if negotiation is done. Break if there's an error */
787 err
= phy_aneg_done(phydev
);
791 /* If AN is done, we're running */
793 phydev
->state
= PHY_RUNNING
;
794 netif_carrier_on(phydev
->attached_dev
);
795 phydev
->adjust_link(phydev
->attached_dev
);
797 } else if (0 == phydev
->link_timeout
--)
801 err
= phy_read_status(phydev
);
806 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
807 err
= phy_aneg_done(phydev
);
812 phydev
->state
= PHY_AN
;
813 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
817 phydev
->state
= PHY_RUNNING
;
818 netif_carrier_on(phydev
->attached_dev
);
819 phydev
->adjust_link(phydev
->attached_dev
);
823 err
= genphy_update_link(phydev
);
828 phydev
->state
= PHY_RUNNING
;
829 netif_carrier_on(phydev
->attached_dev
);
831 if (0 == phydev
->link_timeout
--)
835 phydev
->adjust_link(phydev
->attached_dev
);
838 /* Only register a CHANGE if we are
839 * polling or ignoring interrupts
841 if (!phy_interrupt_is_valid(phydev
))
842 phydev
->state
= PHY_CHANGELINK
;
845 err
= phy_read_status(phydev
);
850 phydev
->state
= PHY_RUNNING
;
851 netif_carrier_on(phydev
->attached_dev
);
853 phydev
->state
= PHY_NOLINK
;
854 netif_carrier_off(phydev
->attached_dev
);
857 phydev
->adjust_link(phydev
->attached_dev
);
859 if (phy_interrupt_is_valid(phydev
))
860 err
= phy_config_interrupt(phydev
,
861 PHY_INTERRUPT_ENABLED
);
866 netif_carrier_off(phydev
->attached_dev
);
867 phydev
->adjust_link(phydev
->attached_dev
);
872 err
= phy_clear_interrupt(phydev
);
876 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
880 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
881 err
= phy_aneg_done(phydev
);
885 /* err > 0 if AN is done.
886 * Otherwise, it's 0, and we're still waiting for AN
889 err
= phy_read_status(phydev
);
894 phydev
->state
= PHY_RUNNING
;
895 netif_carrier_on(phydev
->attached_dev
);
897 phydev
->state
= PHY_NOLINK
;
899 phydev
->adjust_link(phydev
->attached_dev
);
901 phydev
->state
= PHY_AN
;
902 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
905 err
= phy_read_status(phydev
);
910 phydev
->state
= PHY_RUNNING
;
911 netif_carrier_on(phydev
->attached_dev
);
913 phydev
->state
= PHY_NOLINK
;
915 phydev
->adjust_link(phydev
->attached_dev
);
921 mutex_unlock(&phydev
->lock
);
924 err
= phy_start_aneg(phydev
);
933 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
,
934 PHY_STATE_TIME
* HZ
);
937 void phy_mac_interrupt(struct phy_device
*phydev
, int new_link
)
939 cancel_work_sync(&phydev
->phy_queue
);
940 phydev
->link
= new_link
;
941 schedule_work(&phydev
->phy_queue
);
943 EXPORT_SYMBOL(phy_mac_interrupt
);
945 static inline void mmd_phy_indirect(struct mii_bus
*bus
, int prtad
, int devad
,
948 /* Write the desired MMD Devad */
949 bus
->write(bus
, addr
, MII_MMD_CTRL
, devad
);
951 /* Write the desired MMD register address */
952 bus
->write(bus
, addr
, MII_MMD_DATA
, prtad
);
954 /* Select the Function : DATA with no post increment */
955 bus
->write(bus
, addr
, MII_MMD_CTRL
, (devad
| MII_MMD_CTRL_NOINCR
));
959 * phy_read_mmd_indirect - reads data from the MMD registers
960 * @phydev: The PHY device bus
961 * @prtad: MMD Address
963 * @addr: PHY address on the MII bus
965 * Description: it reads data from the MMD registers (clause 22 to access to
966 * clause 45) of the specified phy address.
967 * To read these register we have:
968 * 1) Write reg 13 // DEVAD
969 * 2) Write reg 14 // MMD Address
970 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
971 * 3) Read reg 14 // Read MMD data
973 int phy_read_mmd_indirect(struct phy_device
*phydev
, int prtad
,
976 struct phy_driver
*phydrv
= phydev
->drv
;
979 if (phydrv
->read_mmd_indirect
== NULL
) {
980 mmd_phy_indirect(phydev
->bus
, prtad
, devad
, addr
);
982 /* Read the content of the MMD's selected register */
983 value
= phydev
->bus
->read(phydev
->bus
, addr
, MII_MMD_DATA
);
985 value
= phydrv
->read_mmd_indirect(phydev
, prtad
, devad
, addr
);
989 EXPORT_SYMBOL(phy_read_mmd_indirect
);
992 * phy_write_mmd_indirect - writes data to the MMD registers
993 * @phydev: The PHY device
994 * @prtad: MMD Address
996 * @addr: PHY address on the MII bus
997 * @data: data to write in the MMD register
999 * Description: Write data from the MMD registers of the specified
1001 * To write these register we have:
1002 * 1) Write reg 13 // DEVAD
1003 * 2) Write reg 14 // MMD Address
1004 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1005 * 3) Write reg 14 // Write MMD data
1007 void phy_write_mmd_indirect(struct phy_device
*phydev
, int prtad
,
1008 int devad
, int addr
, u32 data
)
1010 struct phy_driver
*phydrv
= phydev
->drv
;
1012 if (phydrv
->write_mmd_indirect
== NULL
) {
1013 mmd_phy_indirect(phydev
->bus
, prtad
, devad
, addr
);
1015 /* Write the data into MMD's selected register */
1016 phydev
->bus
->write(phydev
->bus
, addr
, MII_MMD_DATA
, data
);
1018 phydrv
->write_mmd_indirect(phydev
, prtad
, devad
, addr
, data
);
1021 EXPORT_SYMBOL(phy_write_mmd_indirect
);
1024 * phy_init_eee - init and check the EEE feature
1025 * @phydev: target phy_device struct
1026 * @clk_stop_enable: PHY may stop the clock during LPI
1028 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1029 * is supported by looking at the MMD registers 3.20 and 7.60/61
1030 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1033 int phy_init_eee(struct phy_device
*phydev
, bool clk_stop_enable
)
1035 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1036 * Also EEE feature is active when core is operating with MII, GMII
1037 * or RGMII. Internal PHYs are also allowed to proceed and should
1038 * return an error if they do not support EEE.
1040 if ((phydev
->duplex
== DUPLEX_FULL
) &&
1041 ((phydev
->interface
== PHY_INTERFACE_MODE_MII
) ||
1042 (phydev
->interface
== PHY_INTERFACE_MODE_GMII
) ||
1043 (phydev
->interface
== PHY_INTERFACE_MODE_RGMII
) ||
1044 phy_is_internal(phydev
))) {
1045 int eee_lp
, eee_cap
, eee_adv
;
1050 /* Read phy status to properly get the right settings */
1051 status
= phy_read_status(phydev
);
1055 /* First check if the EEE ability is supported */
1056 eee_cap
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1057 MDIO_MMD_PCS
, phydev
->addr
);
1061 cap
= mmd_eee_cap_to_ethtool_sup_t(eee_cap
);
1065 /* Check which link settings negotiated and verify it in
1066 * the EEE advertising registers.
1068 eee_lp
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1069 MDIO_MMD_AN
, phydev
->addr
);
1073 eee_adv
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1074 MDIO_MMD_AN
, phydev
->addr
);
1078 adv
= mmd_eee_adv_to_ethtool_adv_t(eee_adv
);
1079 lp
= mmd_eee_adv_to_ethtool_adv_t(eee_lp
);
1080 idx
= phy_find_setting(phydev
->speed
, phydev
->duplex
);
1081 if (!(lp
& adv
& settings
[idx
].setting
))
1084 if (clk_stop_enable
) {
1085 /* Configure the PHY to stop receiving xMII
1086 * clock while it is signaling LPI.
1088 int val
= phy_read_mmd_indirect(phydev
, MDIO_CTRL1
,
1094 val
|= MDIO_PCS_CTRL1_CLKSTOP_EN
;
1095 phy_write_mmd_indirect(phydev
, MDIO_CTRL1
,
1096 MDIO_MMD_PCS
, phydev
->addr
,
1100 return 0; /* EEE supported */
1103 return -EPROTONOSUPPORT
;
1105 EXPORT_SYMBOL(phy_init_eee
);
1108 * phy_get_eee_err - report the EEE wake error count
1109 * @phydev: target phy_device struct
1111 * Description: it is to report the number of time where the PHY
1112 * failed to complete its normal wake sequence.
1114 int phy_get_eee_err(struct phy_device
*phydev
)
1116 return phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_WK_ERR
,
1117 MDIO_MMD_PCS
, phydev
->addr
);
1119 EXPORT_SYMBOL(phy_get_eee_err
);
1122 * phy_ethtool_get_eee - get EEE supported and status
1123 * @phydev: target phy_device struct
1124 * @data: ethtool_eee data
1126 * Description: it reportes the Supported/Advertisement/LP Advertisement
1129 int phy_ethtool_get_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1133 /* Get Supported EEE */
1134 val
= phy_read_mmd_indirect(phydev
, MDIO_PCS_EEE_ABLE
,
1135 MDIO_MMD_PCS
, phydev
->addr
);
1138 data
->supported
= mmd_eee_cap_to_ethtool_sup_t(val
);
1140 /* Get advertisement EEE */
1141 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
,
1142 MDIO_MMD_AN
, phydev
->addr
);
1145 data
->advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1147 /* Get LP advertisement EEE */
1148 val
= phy_read_mmd_indirect(phydev
, MDIO_AN_EEE_LPABLE
,
1149 MDIO_MMD_AN
, phydev
->addr
);
1152 data
->lp_advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1156 EXPORT_SYMBOL(phy_ethtool_get_eee
);
1159 * phy_ethtool_set_eee - set EEE supported and status
1160 * @phydev: target phy_device struct
1161 * @data: ethtool_eee data
1163 * Description: it is to program the Advertisement EEE register.
1165 int phy_ethtool_set_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1167 int val
= ethtool_adv_to_mmd_eee_adv_t(data
->advertised
);
1169 phy_write_mmd_indirect(phydev
, MDIO_AN_EEE_ADV
, MDIO_MMD_AN
,
1174 EXPORT_SYMBOL(phy_ethtool_set_eee
);
1176 int phy_ethtool_set_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1178 if (phydev
->drv
->set_wol
)
1179 return phydev
->drv
->set_wol(phydev
, wol
);
1183 EXPORT_SYMBOL(phy_ethtool_set_wol
);
1185 void phy_ethtool_get_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1187 if (phydev
->drv
->get_wol
)
1188 phydev
->drv
->get_wol(phydev
, wol
);
1190 EXPORT_SYMBOL(phy_ethtool_get_wol
);