2 * drivers/net/phy/phy.c
4 * Framework for configuring and reading PHY devices
5 * Based on code in sungem_phy.c and gianfar_phy.c
9 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 * Copyright (c) 2006, 2007 Maciej W. Rozycki
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/errno.h>
24 #include <linux/unistd.h>
25 #include <linux/interrupt.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/skbuff.h>
32 #include <linux/module.h>
33 #include <linux/mii.h>
34 #include <linux/ethtool.h>
35 #include <linux/phy.h>
36 #include <linux/timer.h>
37 #include <linux/workqueue.h>
38 #include <linux/mdio.h>
40 #include <linux/atomic.h>
43 #include <asm/uaccess.h>
46 * phy_print_status - Convenience function to print out the current phy status
47 * @phydev: the phy_device struct
49 void phy_print_status(struct phy_device
*phydev
)
52 pr_info("%s - Link is Up - %d/%s\n",
53 dev_name(&phydev
->dev
),
55 DUPLEX_FULL
== phydev
->duplex
? "Full" : "Half");
57 pr_info("%s - Link is Down\n", dev_name(&phydev
->dev
));
59 EXPORT_SYMBOL(phy_print_status
);
62 * phy_clear_interrupt - Ack the phy device's interrupt
63 * @phydev: the phy_device struct
65 * If the @phydev driver has an ack_interrupt function, call it to
66 * ack and clear the phy device's interrupt.
68 * Returns 0 on success on < 0 on error.
70 static int phy_clear_interrupt(struct phy_device
*phydev
)
74 if (phydev
->drv
->ack_interrupt
)
75 err
= phydev
->drv
->ack_interrupt(phydev
);
81 * phy_config_interrupt - configure the PHY device for the requested interrupts
82 * @phydev: the phy_device struct
83 * @interrupts: interrupt flags to configure for this @phydev
85 * Returns 0 on success on < 0 on error.
87 static int phy_config_interrupt(struct phy_device
*phydev
, u32 interrupts
)
91 phydev
->interrupts
= interrupts
;
92 if (phydev
->drv
->config_intr
)
93 err
= phydev
->drv
->config_intr(phydev
);
100 * phy_aneg_done - return auto-negotiation status
101 * @phydev: target phy_device struct
103 * Description: Reads the status register and returns 0 either if
104 * auto-negotiation is incomplete, or if there was an error.
105 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
107 static inline int phy_aneg_done(struct phy_device
*phydev
)
111 retval
= phy_read(phydev
, MII_BMSR
);
113 return (retval
< 0) ? retval
: (retval
& BMSR_ANEGCOMPLETE
);
116 /* A structure for mapping a particular speed and duplex
117 * combination to a particular SUPPORTED and ADVERTISED value */
124 /* A mapping of all SUPPORTED settings to speed/duplex */
125 static const struct phy_setting settings
[] = {
128 .duplex
= DUPLEX_FULL
,
129 .setting
= SUPPORTED_10000baseT_Full
,
133 .duplex
= DUPLEX_FULL
,
134 .setting
= SUPPORTED_1000baseT_Full
,
138 .duplex
= DUPLEX_HALF
,
139 .setting
= SUPPORTED_1000baseT_Half
,
143 .duplex
= DUPLEX_FULL
,
144 .setting
= SUPPORTED_100baseT_Full
,
148 .duplex
= DUPLEX_HALF
,
149 .setting
= SUPPORTED_100baseT_Half
,
153 .duplex
= DUPLEX_FULL
,
154 .setting
= SUPPORTED_10baseT_Full
,
158 .duplex
= DUPLEX_HALF
,
159 .setting
= SUPPORTED_10baseT_Half
,
163 #define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
166 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
167 * @speed: speed to match
168 * @duplex: duplex to match
170 * Description: Searches the settings array for the setting which
171 * matches the desired speed and duplex, and returns the index
172 * of that setting. Returns the index of the last setting if
173 * none of the others match.
175 static inline int phy_find_setting(int speed
, int duplex
)
179 while (idx
< ARRAY_SIZE(settings
) &&
180 (settings
[idx
].speed
!= speed
||
181 settings
[idx
].duplex
!= duplex
))
184 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
188 * phy_find_valid - find a PHY setting that matches the requested features mask
189 * @idx: The first index in settings[] to search
190 * @features: A mask of the valid settings
192 * Description: Returns the index of the first valid setting less
193 * than or equal to the one pointed to by idx, as determined by
194 * the mask in features. Returns the index of the last setting
195 * if nothing else matches.
197 static inline int phy_find_valid(int idx
, u32 features
)
199 while (idx
< MAX_NUM_SETTINGS
&& !(settings
[idx
].setting
& features
))
202 return idx
< MAX_NUM_SETTINGS
? idx
: MAX_NUM_SETTINGS
- 1;
206 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
207 * @phydev: the target phy_device struct
209 * Description: Make sure the PHY is set to supported speeds and
210 * duplexes. Drop down by one in this order: 1000/FULL,
211 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
213 static void phy_sanitize_settings(struct phy_device
*phydev
)
215 u32 features
= phydev
->supported
;
218 /* Sanitize settings based on PHY capabilities */
219 if ((features
& SUPPORTED_Autoneg
) == 0)
220 phydev
->autoneg
= AUTONEG_DISABLE
;
222 idx
= phy_find_valid(phy_find_setting(phydev
->speed
, phydev
->duplex
),
225 phydev
->speed
= settings
[idx
].speed
;
226 phydev
->duplex
= settings
[idx
].duplex
;
230 * phy_ethtool_sset - generic ethtool sset function, handles all the details
231 * @phydev: target phy_device struct
234 * A few notes about parameter checking:
235 * - We don't set port or transceiver, so we don't care what they
237 * - phy_start_aneg() will make sure forced settings are sane, and
238 * choose the next best ones from the ones selected, so we don't
239 * care if ethtool tries to give us bad values.
241 int phy_ethtool_sset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
243 u32 speed
= ethtool_cmd_speed(cmd
);
245 if (cmd
->phy_address
!= phydev
->addr
)
248 /* We make sure that we don't pass unsupported
249 * values in to the PHY */
250 cmd
->advertising
&= phydev
->supported
;
252 /* Verify the settings we care about. */
253 if (cmd
->autoneg
!= AUTONEG_ENABLE
&& cmd
->autoneg
!= AUTONEG_DISABLE
)
256 if (cmd
->autoneg
== AUTONEG_ENABLE
&& cmd
->advertising
== 0)
259 if (cmd
->autoneg
== AUTONEG_DISABLE
&&
260 ((speed
!= SPEED_1000
&&
261 speed
!= SPEED_100
&&
262 speed
!= SPEED_10
) ||
263 (cmd
->duplex
!= DUPLEX_HALF
&&
264 cmd
->duplex
!= DUPLEX_FULL
)))
267 phydev
->autoneg
= cmd
->autoneg
;
269 phydev
->speed
= speed
;
271 phydev
->advertising
= cmd
->advertising
;
273 if (AUTONEG_ENABLE
== cmd
->autoneg
)
274 phydev
->advertising
|= ADVERTISED_Autoneg
;
276 phydev
->advertising
&= ~ADVERTISED_Autoneg
;
278 phydev
->duplex
= cmd
->duplex
;
280 /* Restart the PHY */
281 phy_start_aneg(phydev
);
285 EXPORT_SYMBOL(phy_ethtool_sset
);
287 int phy_ethtool_gset(struct phy_device
*phydev
, struct ethtool_cmd
*cmd
)
289 cmd
->supported
= phydev
->supported
;
291 cmd
->advertising
= phydev
->advertising
;
292 cmd
->lp_advertising
= phydev
->lp_advertising
;
294 ethtool_cmd_speed_set(cmd
, phydev
->speed
);
295 cmd
->duplex
= phydev
->duplex
;
296 cmd
->port
= PORT_MII
;
297 cmd
->phy_address
= phydev
->addr
;
298 cmd
->transceiver
= phy_is_internal(phydev
) ?
299 XCVR_INTERNAL
: XCVR_EXTERNAL
;
300 cmd
->autoneg
= phydev
->autoneg
;
304 EXPORT_SYMBOL(phy_ethtool_gset
);
307 * phy_mii_ioctl - generic PHY MII ioctl interface
308 * @phydev: the phy_device struct
309 * @ifr: &struct ifreq for socket ioctl's
310 * @cmd: ioctl cmd to execute
312 * Note that this function is currently incompatible with the
313 * PHYCONTROL layer. It changes registers without regard to
314 * current state. Use at own risk.
316 int phy_mii_ioctl(struct phy_device
*phydev
,
317 struct ifreq
*ifr
, int cmd
)
319 struct mii_ioctl_data
*mii_data
= if_mii(ifr
);
320 u16 val
= mii_data
->val_in
;
325 mii_data
->phy_id
= phydev
->addr
;
329 mii_data
->val_out
= mdiobus_read(phydev
->bus
, mii_data
->phy_id
,
334 if (mii_data
->phy_id
== phydev
->addr
) {
335 switch(mii_data
->reg_num
) {
337 if ((val
& (BMCR_RESET
|BMCR_ANENABLE
)) == 0)
338 phydev
->autoneg
= AUTONEG_DISABLE
;
340 phydev
->autoneg
= AUTONEG_ENABLE
;
341 if ((!phydev
->autoneg
) && (val
& BMCR_FULLDPLX
))
342 phydev
->duplex
= DUPLEX_FULL
;
344 phydev
->duplex
= DUPLEX_HALF
;
345 if ((!phydev
->autoneg
) &&
346 (val
& BMCR_SPEED1000
))
347 phydev
->speed
= SPEED_1000
;
348 else if ((!phydev
->autoneg
) &&
349 (val
& BMCR_SPEED100
))
350 phydev
->speed
= SPEED_100
;
353 phydev
->advertising
= val
;
361 mdiobus_write(phydev
->bus
, mii_data
->phy_id
,
362 mii_data
->reg_num
, val
);
364 if (mii_data
->reg_num
== MII_BMCR
&&
366 ret
= phy_init_hw(phydev
);
370 if (phydev
->drv
->hwtstamp
)
371 return phydev
->drv
->hwtstamp(phydev
, ifr
);
380 EXPORT_SYMBOL(phy_mii_ioctl
);
383 * phy_start_aneg - start auto-negotiation for this PHY device
384 * @phydev: the phy_device struct
386 * Description: Sanitizes the settings (if we're not autonegotiating
387 * them), and then calls the driver's config_aneg function.
388 * If the PHYCONTROL Layer is operating, we change the state to
389 * reflect the beginning of Auto-negotiation or forcing.
391 int phy_start_aneg(struct phy_device
*phydev
)
395 mutex_lock(&phydev
->lock
);
397 if (AUTONEG_DISABLE
== phydev
->autoneg
)
398 phy_sanitize_settings(phydev
);
400 err
= phydev
->drv
->config_aneg(phydev
);
405 if (phydev
->state
!= PHY_HALTED
) {
406 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
407 phydev
->state
= PHY_AN
;
408 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
410 phydev
->state
= PHY_FORCING
;
411 phydev
->link_timeout
= PHY_FORCE_TIMEOUT
;
416 mutex_unlock(&phydev
->lock
);
419 EXPORT_SYMBOL(phy_start_aneg
);
423 * phy_start_machine - start PHY state machine tracking
424 * @phydev: the phy_device struct
425 * @handler: callback function for state change notifications
427 * Description: The PHY infrastructure can run a state machine
428 * which tracks whether the PHY is starting up, negotiating,
429 * etc. This function starts the timer which tracks the state
430 * of the PHY. If you want to be notified when the state changes,
431 * pass in the callback @handler, otherwise, pass NULL. If you
432 * want to maintain your own state machine, do not call this
435 void phy_start_machine(struct phy_device
*phydev
,
436 void (*handler
)(struct net_device
*))
438 phydev
->adjust_state
= handler
;
440 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, HZ
);
444 * phy_stop_machine - stop the PHY state machine tracking
445 * @phydev: target phy_device struct
447 * Description: Stops the state machine timer, sets the state to UP
448 * (unless it wasn't up yet). This function must be called BEFORE
451 void phy_stop_machine(struct phy_device
*phydev
)
453 cancel_delayed_work_sync(&phydev
->state_queue
);
455 mutex_lock(&phydev
->lock
);
456 if (phydev
->state
> PHY_UP
)
457 phydev
->state
= PHY_UP
;
458 mutex_unlock(&phydev
->lock
);
460 phydev
->adjust_state
= NULL
;
464 * phy_error - enter HALTED state for this PHY device
465 * @phydev: target phy_device struct
467 * Moves the PHY to the HALTED state in response to a read
468 * or write error, and tells the controller the link is down.
469 * Must not be called from interrupt context, or while the
470 * phydev->lock is held.
472 static void phy_error(struct phy_device
*phydev
)
474 mutex_lock(&phydev
->lock
);
475 phydev
->state
= PHY_HALTED
;
476 mutex_unlock(&phydev
->lock
);
480 * phy_interrupt - PHY interrupt handler
481 * @irq: interrupt line
482 * @phy_dat: phy_device pointer
484 * Description: When a PHY interrupt occurs, the handler disables
485 * interrupts, and schedules a work task to clear the interrupt.
487 static irqreturn_t
phy_interrupt(int irq
, void *phy_dat
)
489 struct phy_device
*phydev
= phy_dat
;
491 if (PHY_HALTED
== phydev
->state
)
492 return IRQ_NONE
; /* It can't be ours. */
494 /* The MDIO bus is not allowed to be written in interrupt
495 * context, so we need to disable the irq here. A work
496 * queue will write the PHY to disable and clear the
497 * interrupt, and then reenable the irq line. */
498 disable_irq_nosync(irq
);
499 atomic_inc(&phydev
->irq_disable
);
501 queue_work(system_power_efficient_wq
, &phydev
->phy_queue
);
507 * phy_enable_interrupts - Enable the interrupts from the PHY side
508 * @phydev: target phy_device struct
510 static int phy_enable_interrupts(struct phy_device
*phydev
)
514 err
= phy_clear_interrupt(phydev
);
519 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
525 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
526 * @phydev: target phy_device struct
528 static int phy_disable_interrupts(struct phy_device
*phydev
)
532 /* Disable PHY interrupts */
533 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
538 /* Clear the interrupt */
539 err
= phy_clear_interrupt(phydev
);
553 * phy_start_interrupts - request and enable interrupts for a PHY device
554 * @phydev: target phy_device struct
556 * Description: Request the interrupt for the given PHY.
557 * If this fails, then we set irq to PHY_POLL.
558 * Otherwise, we enable the interrupts in the PHY.
559 * This should only be called with a valid IRQ number.
560 * Returns 0 on success or < 0 on error.
562 int phy_start_interrupts(struct phy_device
*phydev
)
566 atomic_set(&phydev
->irq_disable
, 0);
567 if (request_irq(phydev
->irq
, phy_interrupt
,
571 pr_warn("%s: Can't get IRQ %d (PHY)\n",
572 phydev
->bus
->name
, phydev
->irq
);
573 phydev
->irq
= PHY_POLL
;
577 err
= phy_enable_interrupts(phydev
);
581 EXPORT_SYMBOL(phy_start_interrupts
);
584 * phy_stop_interrupts - disable interrupts from a PHY device
585 * @phydev: target phy_device struct
587 int phy_stop_interrupts(struct phy_device
*phydev
)
591 err
= phy_disable_interrupts(phydev
);
596 free_irq(phydev
->irq
, phydev
);
599 * Cannot call flush_scheduled_work() here as desired because
600 * of rtnl_lock(), but we do not really care about what would
601 * be done, except from enable_irq(), so cancel any work
602 * possibly pending and take care of the matter below.
604 cancel_work_sync(&phydev
->phy_queue
);
606 * If work indeed has been cancelled, disable_irq() will have
607 * been left unbalanced from phy_interrupt() and enable_irq()
608 * has to be called so that other devices on the line work.
610 while (atomic_dec_return(&phydev
->irq_disable
) >= 0)
611 enable_irq(phydev
->irq
);
615 EXPORT_SYMBOL(phy_stop_interrupts
);
619 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
620 * @work: work_struct that describes the work to be done
622 void phy_change(struct work_struct
*work
)
625 struct phy_device
*phydev
=
626 container_of(work
, struct phy_device
, phy_queue
);
628 if (phydev
->drv
->did_interrupt
&&
629 !phydev
->drv
->did_interrupt(phydev
))
632 err
= phy_disable_interrupts(phydev
);
637 mutex_lock(&phydev
->lock
);
638 if ((PHY_RUNNING
== phydev
->state
) || (PHY_NOLINK
== phydev
->state
))
639 phydev
->state
= PHY_CHANGELINK
;
640 mutex_unlock(&phydev
->lock
);
642 atomic_dec(&phydev
->irq_disable
);
643 enable_irq(phydev
->irq
);
645 /* Reenable interrupts */
646 if (PHY_HALTED
!= phydev
->state
)
647 err
= phy_config_interrupt(phydev
, PHY_INTERRUPT_ENABLED
);
652 /* reschedule state queue work to run as soon as possible */
653 cancel_delayed_work_sync(&phydev
->state_queue
);
654 queue_delayed_work(system_power_efficient_wq
, &phydev
->state_queue
, 0);
659 atomic_dec(&phydev
->irq_disable
);
660 enable_irq(phydev
->irq
);
664 disable_irq(phydev
->irq
);
665 atomic_inc(&phydev
->irq_disable
);
671 * phy_stop - Bring down the PHY link, and stop checking the status
672 * @phydev: target phy_device struct
674 void phy_stop(struct phy_device
*phydev
)
676 mutex_lock(&phydev
->lock
);
678 if (PHY_HALTED
== phydev
->state
)
681 if (phy_interrupt_is_valid(phydev
)) {
682 /* Disable PHY Interrupts */
683 phy_config_interrupt(phydev
, PHY_INTERRUPT_DISABLED
);
685 /* Clear any pending interrupts */
686 phy_clear_interrupt(phydev
);
689 phydev
->state
= PHY_HALTED
;
692 mutex_unlock(&phydev
->lock
);
695 * Cannot call flush_scheduled_work() here as desired because
696 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
697 * will not reenable interrupts.
703 * phy_start - start or restart a PHY device
704 * @phydev: target phy_device struct
706 * Description: Indicates the attached device's readiness to
707 * handle PHY-related work. Used during startup to start the
708 * PHY, and after a call to phy_stop() to resume operation.
709 * Also used to indicate the MDIO bus has cleared an error
712 void phy_start(struct phy_device
*phydev
)
714 mutex_lock(&phydev
->lock
);
716 switch (phydev
->state
) {
718 phydev
->state
= PHY_PENDING
;
721 phydev
->state
= PHY_UP
;
724 phydev
->state
= PHY_RESUMING
;
728 mutex_unlock(&phydev
->lock
);
730 EXPORT_SYMBOL(phy_stop
);
731 EXPORT_SYMBOL(phy_start
);
734 * phy_state_machine - Handle the state machine
735 * @work: work_struct that describes the work to be done
737 void phy_state_machine(struct work_struct
*work
)
739 struct delayed_work
*dwork
= to_delayed_work(work
);
740 struct phy_device
*phydev
=
741 container_of(dwork
, struct phy_device
, state_queue
);
745 mutex_lock(&phydev
->lock
);
747 if (phydev
->adjust_state
)
748 phydev
->adjust_state(phydev
->attached_dev
);
750 switch(phydev
->state
) {
759 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
763 err
= phy_read_status(phydev
);
768 /* If the link is down, give up on
769 * negotiation for now */
771 phydev
->state
= PHY_NOLINK
;
772 netif_carrier_off(phydev
->attached_dev
);
773 phydev
->adjust_link(phydev
->attached_dev
);
777 /* Check if negotiation is done. Break
778 * if there's an error */
779 err
= phy_aneg_done(phydev
);
783 /* If AN is done, we're running */
785 phydev
->state
= PHY_RUNNING
;
786 netif_carrier_on(phydev
->attached_dev
);
787 phydev
->adjust_link(phydev
->attached_dev
);
789 } else if (0 == phydev
->link_timeout
--) {
791 /* If we have the magic_aneg bit,
793 if (phydev
->drv
->flags
& PHY_HAS_MAGICANEG
)
798 err
= phy_read_status(phydev
);
804 phydev
->state
= PHY_RUNNING
;
805 netif_carrier_on(phydev
->attached_dev
);
806 phydev
->adjust_link(phydev
->attached_dev
);
810 err
= genphy_update_link(phydev
);
816 phydev
->state
= PHY_RUNNING
;
817 netif_carrier_on(phydev
->attached_dev
);
819 if (0 == phydev
->link_timeout
--)
823 phydev
->adjust_link(phydev
->attached_dev
);
826 /* Only register a CHANGE if we are
827 * polling or ignoring interrupts
829 if (!phy_interrupt_is_valid(phydev
))
830 phydev
->state
= PHY_CHANGELINK
;
833 err
= phy_read_status(phydev
);
839 phydev
->state
= PHY_RUNNING
;
840 netif_carrier_on(phydev
->attached_dev
);
842 phydev
->state
= PHY_NOLINK
;
843 netif_carrier_off(phydev
->attached_dev
);
846 phydev
->adjust_link(phydev
->attached_dev
);
848 if (phy_interrupt_is_valid(phydev
))
849 err
= phy_config_interrupt(phydev
,
850 PHY_INTERRUPT_ENABLED
);
855 netif_carrier_off(phydev
->attached_dev
);
856 phydev
->adjust_link(phydev
->attached_dev
);
861 err
= phy_clear_interrupt(phydev
);
866 err
= phy_config_interrupt(phydev
,
867 PHY_INTERRUPT_ENABLED
);
872 if (AUTONEG_ENABLE
== phydev
->autoneg
) {
873 err
= phy_aneg_done(phydev
);
877 /* err > 0 if AN is done.
878 * Otherwise, it's 0, and we're
879 * still waiting for AN */
881 err
= phy_read_status(phydev
);
886 phydev
->state
= PHY_RUNNING
;
887 netif_carrier_on(phydev
->attached_dev
);
889 phydev
->state
= PHY_NOLINK
;
890 phydev
->adjust_link(phydev
->attached_dev
);
892 phydev
->state
= PHY_AN
;
893 phydev
->link_timeout
= PHY_AN_TIMEOUT
;
896 err
= phy_read_status(phydev
);
901 phydev
->state
= PHY_RUNNING
;
902 netif_carrier_on(phydev
->attached_dev
);
904 phydev
->state
= PHY_NOLINK
;
905 phydev
->adjust_link(phydev
->attached_dev
);
910 mutex_unlock(&phydev
->lock
);
913 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 * @bus: the target MII 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 mii_bus
*bus
, int prtad
, int devad
,
963 mmd_phy_indirect(bus
, prtad
, devad
, addr
);
965 /* Read the content of the MMD's selected register */
966 ret
= bus
->read(bus
, addr
, MII_MMD_DATA
);
972 * phy_write_mmd_indirect - writes data to the MMD registers
973 * @bus: the target MII bus
974 * @prtad: MMD Address
976 * @addr: PHY address on the MII bus
977 * @data: data to write in the MMD register
979 * Description: Write data from the MMD registers of the specified
981 * To write these register we have:
982 * 1) Write reg 13 // DEVAD
983 * 2) Write reg 14 // MMD Address
984 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
985 * 3) Write reg 14 // Write MMD data
987 static void phy_write_mmd_indirect(struct mii_bus
*bus
, int prtad
, int devad
,
990 mmd_phy_indirect(bus
, prtad
, devad
, addr
);
992 /* Write the data into MMD's selected register */
993 bus
->write(bus
, addr
, MII_MMD_DATA
, data
);
997 * phy_init_eee - init and check the EEE feature
998 * @phydev: target phy_device struct
999 * @clk_stop_enable: PHY may stop the clock during LPI
1001 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1002 * is supported by looking at the MMD registers 3.20 and 7.60/61
1003 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1006 int phy_init_eee(struct phy_device
*phydev
, bool clk_stop_enable
)
1008 int ret
= -EPROTONOSUPPORT
;
1010 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1011 * Also EEE feature is active when core is operating with MII, GMII
1014 if ((phydev
->duplex
== DUPLEX_FULL
) &&
1015 ((phydev
->interface
== PHY_INTERFACE_MODE_MII
) ||
1016 (phydev
->interface
== PHY_INTERFACE_MODE_GMII
) ||
1017 (phydev
->interface
== PHY_INTERFACE_MODE_RGMII
))) {
1018 int eee_lp
, eee_cap
, eee_adv
;
1022 /* Read phy status to properly get the right settings */
1023 status
= phy_read_status(phydev
);
1027 /* First check if the EEE ability is supported */
1028 eee_cap
= phy_read_mmd_indirect(phydev
->bus
, MDIO_PCS_EEE_ABLE
,
1029 MDIO_MMD_PCS
, phydev
->addr
);
1033 cap
= mmd_eee_cap_to_ethtool_sup_t(eee_cap
);
1037 /* Check which link settings negotiated and verify it in
1038 * the EEE advertising registers.
1040 eee_lp
= phy_read_mmd_indirect(phydev
->bus
, MDIO_AN_EEE_LPABLE
,
1041 MDIO_MMD_AN
, phydev
->addr
);
1045 eee_adv
= phy_read_mmd_indirect(phydev
->bus
, MDIO_AN_EEE_ADV
,
1046 MDIO_MMD_AN
, phydev
->addr
);
1050 adv
= mmd_eee_adv_to_ethtool_adv_t(eee_adv
);
1051 lp
= mmd_eee_adv_to_ethtool_adv_t(eee_lp
);
1052 idx
= phy_find_setting(phydev
->speed
, phydev
->duplex
);
1053 if (!(lp
& adv
& settings
[idx
].setting
))
1056 if (clk_stop_enable
) {
1057 /* Configure the PHY to stop receiving xMII
1058 * clock while it is signaling LPI.
1060 int val
= phy_read_mmd_indirect(phydev
->bus
, MDIO_CTRL1
,
1066 val
|= MDIO_PCS_CTRL1_CLKSTOP_EN
;
1067 phy_write_mmd_indirect(phydev
->bus
, MDIO_CTRL1
,
1068 MDIO_MMD_PCS
, phydev
->addr
, val
);
1071 ret
= 0; /* EEE supported */
1077 EXPORT_SYMBOL(phy_init_eee
);
1080 * phy_get_eee_err - report the EEE wake error count
1081 * @phydev: target phy_device struct
1083 * Description: it is to report the number of time where the PHY
1084 * failed to complete its normal wake sequence.
1086 int phy_get_eee_err(struct phy_device
*phydev
)
1088 return phy_read_mmd_indirect(phydev
->bus
, MDIO_PCS_EEE_WK_ERR
,
1089 MDIO_MMD_PCS
, phydev
->addr
);
1092 EXPORT_SYMBOL(phy_get_eee_err
);
1095 * phy_ethtool_get_eee - get EEE supported and status
1096 * @phydev: target phy_device struct
1097 * @data: ethtool_eee data
1099 * Description: it reportes the Supported/Advertisement/LP Advertisement
1102 int phy_ethtool_get_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1106 /* Get Supported EEE */
1107 val
= phy_read_mmd_indirect(phydev
->bus
, MDIO_PCS_EEE_ABLE
,
1108 MDIO_MMD_PCS
, phydev
->addr
);
1111 data
->supported
= mmd_eee_cap_to_ethtool_sup_t(val
);
1113 /* Get advertisement EEE */
1114 val
= phy_read_mmd_indirect(phydev
->bus
, MDIO_AN_EEE_ADV
,
1115 MDIO_MMD_AN
, phydev
->addr
);
1118 data
->advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1120 /* Get LP advertisement EEE */
1121 val
= phy_read_mmd_indirect(phydev
->bus
, MDIO_AN_EEE_LPABLE
,
1122 MDIO_MMD_AN
, phydev
->addr
);
1125 data
->lp_advertised
= mmd_eee_adv_to_ethtool_adv_t(val
);
1129 EXPORT_SYMBOL(phy_ethtool_get_eee
);
1132 * phy_ethtool_set_eee - set EEE supported and status
1133 * @phydev: target phy_device struct
1134 * @data: ethtool_eee data
1136 * Description: it is to program the Advertisement EEE register.
1138 int phy_ethtool_set_eee(struct phy_device
*phydev
, struct ethtool_eee
*data
)
1142 val
= ethtool_adv_to_mmd_eee_adv_t(data
->advertised
);
1143 phy_write_mmd_indirect(phydev
->bus
, MDIO_AN_EEE_ADV
, MDIO_MMD_AN
,
1148 EXPORT_SYMBOL(phy_ethtool_set_eee
);
1150 int phy_ethtool_set_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1152 if (phydev
->drv
->set_wol
)
1153 return phydev
->drv
->set_wol(phydev
, wol
);
1157 EXPORT_SYMBOL(phy_ethtool_set_wol
);
1159 void phy_ethtool_get_wol(struct phy_device
*phydev
, struct ethtool_wolinfo
*wol
)
1161 if (phydev
->drv
->get_wol
)
1162 phydev
->drv
->get_wol(phydev
, wol
);
1164 EXPORT_SYMBOL(phy_ethtool_get_wol
);