1 /* Framework for configuring and reading PHY devices
2 * Based on code in sungem_phy.c and gianfar_phy.c
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
7 * Copyright (c) 2006, 2007 Maciej W. Rozycki
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/unistd.h>
22 #include <linux/interrupt.h>
23 #include <linux/delay.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/skbuff.h>
28 #include <linux/module.h>
29 #include <linux/mii.h>
30 #include <linux/ethtool.h>
31 #include <linux/phy.h>
32 #include <linux/timer.h>
33 #include <linux/workqueue.h>
34 #include <linux/mdio.h>
36 #include <linux/uaccess.h>
37 #include <linux/atomic.h>
41 static const char *phy_speed_to_str(int speed)
57 return "Unsupported (update phy.c)";
61 #define PHY_STATE_STR(_state) \
63 return __stringify(_state); \
65 static const char *phy_state_to_str(enum phy_state st)
69 PHY_STATE_STR(STARTING)
71 PHY_STATE_STR(PENDING)
74 PHY_STATE_STR(RUNNING)
76 PHY_STATE_STR(FORCING)
77 PHY_STATE_STR(CHANGELINK)
79 PHY_STATE_STR(RESUMING)
87 * phy_print_status - Convenience function to print out the current phy status
88 * @phydev: the phy_device struct
90 void phy_print_status(struct phy_device *phydev)
93 netdev_info(phydev->attached_dev,
94 "Link is Up - %s/%s - flow control %s\n",
95 phy_speed_to_str(phydev->speed),
96 DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
97 phydev->pause ? "rx/tx" : "off");
99 netdev_info(phydev->attached_dev, "Link is Down\n");
102 EXPORT_SYMBOL(phy_print_status);
105 * phy_clear_interrupt - Ack the phy device's interrupt
106 * @phydev: the phy_device struct
108 * If the @phydev driver has an ack_interrupt function, call it to
109 * ack and clear the phy device's interrupt.
111 * Returns 0 on success or < 0 on error.
113 static int phy_clear_interrupt(struct phy_device *phydev)
115 if (phydev->drv->ack_interrupt)
116 return phydev->drv->ack_interrupt(phydev);
122 * phy_config_interrupt - configure the PHY device for the requested interrupts
123 * @phydev: the phy_device struct
124 * @interrupts: interrupt flags to configure for this @phydev
126 * Returns 0 on success or < 0 on error.
128 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
130 phydev->interrupts = interrupts;
131 if (phydev->drv->config_intr)
132 return phydev->drv->config_intr(phydev);
139 * phy_aneg_done - return auto-negotiation status
140 * @phydev: target phy_device struct
142 * Description: Return the auto-negotiation status from this @phydev
143 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
146 static inline int phy_aneg_done(struct phy_device *phydev)
148 if (phydev->drv->aneg_done)
149 return phydev->drv->aneg_done(phydev);
151 return genphy_aneg_done(phydev);
154 /* A structure for mapping a particular speed and duplex
155 * combination to a particular SUPPORTED and ADVERTISED value
163 /* A mapping of all SUPPORTED settings to speed/duplex */
164 static const struct phy_setting settings[] = {
166 .speed = SPEED_10000,
167 .duplex = DUPLEX_FULL,
168 .setting = SUPPORTED_10000baseKR_Full,
171 .speed = SPEED_10000,
172 .duplex = DUPLEX_FULL,
173 .setting = SUPPORTED_10000baseKX4_Full,
176 .speed = SPEED_10000,
177 .duplex = DUPLEX_FULL,
178 .setting = SUPPORTED_10000baseT_Full,
182 .duplex = DUPLEX_FULL,
183 .setting = SUPPORTED_2500baseX_Full,
187 .duplex = DUPLEX_FULL,
188 .setting = SUPPORTED_1000baseKX_Full,
192 .duplex = DUPLEX_FULL,
193 .setting = SUPPORTED_1000baseT_Full,
197 .duplex = DUPLEX_HALF,
198 .setting = SUPPORTED_1000baseT_Half,
202 .duplex = DUPLEX_FULL,
203 .setting = SUPPORTED_100baseT_Full,
207 .duplex = DUPLEX_HALF,
208 .setting = SUPPORTED_100baseT_Half,
212 .duplex = DUPLEX_FULL,
213 .setting = SUPPORTED_10baseT_Full,
217 .duplex = DUPLEX_HALF,
218 .setting = SUPPORTED_10baseT_Half,
222 #define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
225 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
226 * @speed: speed to match
227 * @duplex: duplex to match
229 * Description: Searches the settings array for the setting which
230 * matches the desired speed and duplex, and returns the index
231 * of that setting. Returns the index of the last setting if
232 * none of the others match.
234 static inline unsigned int phy_find_setting(int speed, int duplex)
236 unsigned int idx = 0;
238 while (idx < ARRAY_SIZE(settings) &&
239 (settings[idx].speed != speed || settings[idx].duplex != duplex))
242 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
246 * phy_find_valid - find a PHY setting that matches the requested features mask
247 * @idx: The first index in settings[] to search
248 * @features: A mask of the valid settings
250 * Description: Returns the index of the first valid setting less
251 * than or equal to the one pointed to by idx, as determined by
252 * the mask in features. Returns the index of the last setting
253 * if nothing else matches.
255 static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
257 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
260 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
264 * phy_check_valid - check if there is a valid PHY setting which matches
265 * speed, duplex, and feature mask
266 * @speed: speed to match
267 * @duplex: duplex to match
268 * @features: A mask of the valid settings
270 * Description: Returns true if there is a valid setting, false otherwise.
272 static inline bool phy_check_valid(int speed, int duplex, u32 features)
276 idx = phy_find_valid(phy_find_setting(speed, duplex), features);
278 return settings[idx].speed == speed && settings[idx].duplex == duplex &&
279 (settings[idx].setting & features);
283 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
284 * @phydev: the target phy_device struct
286 * Description: Make sure the PHY is set to supported speeds and
287 * duplexes. Drop down by one in this order: 1000/FULL,
288 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
290 static void phy_sanitize_settings(struct phy_device *phydev)
292 u32 features = phydev->supported;
295 /* Sanitize settings based on PHY capabilities */
296 if ((features & SUPPORTED_Autoneg) == 0)
297 phydev->autoneg = AUTONEG_DISABLE;
299 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
302 phydev->speed = settings[idx].speed;
303 phydev->duplex = settings[idx].duplex;
307 * phy_ethtool_sset - generic ethtool sset function, handles all the details
308 * @phydev: target phy_device struct
311 * A few notes about parameter checking:
312 * - We don't set port or transceiver, so we don't care what they
314 * - phy_start_aneg() will make sure forced settings are sane, and
315 * choose the next best ones from the ones selected, so we don't
316 * care if ethtool tries to give us bad values.
318 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
320 u32 speed = ethtool_cmd_speed(cmd);
322 if (cmd->phy_address != phydev->addr)
325 /* We make sure that we don't pass unsupported values in to the PHY */
326 cmd->advertising &= phydev->supported;
328 /* Verify the settings we care about. */
329 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
332 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
335 if (cmd->autoneg == AUTONEG_DISABLE &&
336 ((speed != SPEED_1000 &&
337 speed != SPEED_100 &&
338 speed != SPEED_10) ||
339 (cmd->duplex != DUPLEX_HALF &&
340 cmd->duplex != DUPLEX_FULL)))
343 phydev->autoneg = cmd->autoneg;
345 phydev->speed = speed;
347 phydev->advertising = cmd->advertising;
349 if (AUTONEG_ENABLE == cmd->autoneg)
350 phydev->advertising |= ADVERTISED_Autoneg;
352 phydev->advertising &= ~ADVERTISED_Autoneg;
354 phydev->duplex = cmd->duplex;
356 /* Restart the PHY */
357 phy_start_aneg(phydev);
361 EXPORT_SYMBOL(phy_ethtool_sset);
363 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
365 cmd->supported = phydev->supported;
367 cmd->advertising = phydev->advertising;
368 cmd->lp_advertising = phydev->lp_advertising;
370 ethtool_cmd_speed_set(cmd, phydev->speed);
371 cmd->duplex = phydev->duplex;
372 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
373 cmd->port = PORT_BNC;
375 cmd->port = PORT_MII;
376 cmd->phy_address = phydev->addr;
377 cmd->transceiver = phy_is_internal(phydev) ?
378 XCVR_INTERNAL : XCVR_EXTERNAL;
379 cmd->autoneg = phydev->autoneg;
383 EXPORT_SYMBOL(phy_ethtool_gset);
386 * phy_mii_ioctl - generic PHY MII ioctl interface
387 * @phydev: the phy_device struct
388 * @ifr: &struct ifreq for socket ioctl's
389 * @cmd: ioctl cmd to execute
391 * Note that this function is currently incompatible with the
392 * PHYCONTROL layer. It changes registers without regard to
393 * current state. Use at own risk.
395 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
397 struct mii_ioctl_data *mii_data = if_mii(ifr);
398 u16 val = mii_data->val_in;
399 bool change_autoneg = false;
403 mii_data->phy_id = phydev->addr;
407 mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id,
412 if (mii_data->phy_id == phydev->addr) {
413 switch (mii_data->reg_num) {
415 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
416 if (phydev->autoneg == AUTONEG_ENABLE)
417 change_autoneg = true;
418 phydev->autoneg = AUTONEG_DISABLE;
419 if (val & BMCR_FULLDPLX)
420 phydev->duplex = DUPLEX_FULL;
422 phydev->duplex = DUPLEX_HALF;
423 if (val & BMCR_SPEED1000)
424 phydev->speed = SPEED_1000;
425 else if (val & BMCR_SPEED100)
426 phydev->speed = SPEED_100;
427 else phydev->speed = SPEED_10;
430 if (phydev->autoneg == AUTONEG_DISABLE)
431 change_autoneg = true;
432 phydev->autoneg = AUTONEG_ENABLE;
436 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
437 change_autoneg = true;
445 mdiobus_write(phydev->bus, mii_data->phy_id,
446 mii_data->reg_num, val);
448 if (mii_data->reg_num == MII_BMCR &&
450 return phy_init_hw(phydev);
453 return phy_start_aneg(phydev);
458 if (phydev->drv->hwtstamp)
459 return phydev->drv->hwtstamp(phydev, ifr);
466 EXPORT_SYMBOL(phy_mii_ioctl);
469 * phy_start_aneg - start auto-negotiation for this PHY device
470 * @phydev: the phy_device struct
472 * Description: Sanitizes the settings (if we're not autonegotiating
473 * them), and then calls the driver's config_aneg function.
474 * If the PHYCONTROL Layer is operating, we change the state to
475 * reflect the beginning of Auto-negotiation or forcing.
477 int phy_start_aneg(struct phy_device *phydev)
481 mutex_lock(&phydev->lock);
483 if (AUTONEG_DISABLE == phydev->autoneg)
484 phy_sanitize_settings(phydev);
486 /* Invalidate LP advertising flags */
487 phydev->lp_advertising = 0;
489 err = phydev->drv->config_aneg(phydev);
493 if (phydev->state != PHY_HALTED) {
494 if (AUTONEG_ENABLE == phydev->autoneg) {
495 phydev->state = PHY_AN;
496 phydev->link_timeout = PHY_AN_TIMEOUT;
498 phydev->state = PHY_FORCING;
499 phydev->link_timeout = PHY_FORCE_TIMEOUT;
504 mutex_unlock(&phydev->lock);
507 EXPORT_SYMBOL(phy_start_aneg);
510 * phy_start_machine - start PHY state machine tracking
511 * @phydev: the phy_device struct
513 * Description: The PHY infrastructure can run a state machine
514 * which tracks whether the PHY is starting up, negotiating,
515 * etc. This function starts the timer which tracks the state
516 * of the PHY. If you want to maintain your own state machine,
517 * do not call this function.
519 void phy_start_machine(struct phy_device *phydev)
521 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
525 * phy_stop_machine - stop the PHY state machine tracking
526 * @phydev: target phy_device struct
528 * Description: Stops the state machine timer, sets the state to UP
529 * (unless it wasn't up yet). This function must be called BEFORE
532 void phy_stop_machine(struct phy_device *phydev)
534 cancel_delayed_work_sync(&phydev->state_queue);
536 mutex_lock(&phydev->lock);
537 if (phydev->state > PHY_UP)
538 phydev->state = PHY_UP;
539 mutex_unlock(&phydev->lock);
543 * phy_error - enter HALTED state for this PHY device
544 * @phydev: target phy_device struct
546 * Moves the PHY to the HALTED state in response to a read
547 * or write error, and tells the controller the link is down.
548 * Must not be called from interrupt context, or while the
549 * phydev->lock is held.
551 static void phy_error(struct phy_device *phydev)
553 mutex_lock(&phydev->lock);
554 phydev->state = PHY_HALTED;
555 mutex_unlock(&phydev->lock);
559 * phy_interrupt - PHY interrupt handler
560 * @irq: interrupt line
561 * @phy_dat: phy_device pointer
563 * Description: When a PHY interrupt occurs, the handler disables
564 * interrupts, and schedules a work task to clear the interrupt.
566 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
568 struct phy_device *phydev = phy_dat;
570 if (PHY_HALTED == phydev->state)
571 return IRQ_NONE; /* It can't be ours. */
573 /* The MDIO bus is not allowed to be written in interrupt
574 * context, so we need to disable the irq here. A work
575 * queue will write the PHY to disable and clear the
576 * interrupt, and then reenable the irq line.
578 disable_irq_nosync(irq);
579 atomic_inc(&phydev->irq_disable);
581 queue_work(system_power_efficient_wq, &phydev->phy_queue);
587 * phy_enable_interrupts - Enable the interrupts from the PHY side
588 * @phydev: target phy_device struct
590 static int phy_enable_interrupts(struct phy_device *phydev)
592 int err = phy_clear_interrupt(phydev);
597 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
601 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
602 * @phydev: target phy_device struct
604 static int phy_disable_interrupts(struct phy_device *phydev)
608 /* Disable PHY interrupts */
609 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
613 /* Clear the interrupt */
614 err = phy_clear_interrupt(phydev);
627 * phy_start_interrupts - request and enable interrupts for a PHY device
628 * @phydev: target phy_device struct
630 * Description: Request the interrupt for the given PHY.
631 * If this fails, then we set irq to PHY_POLL.
632 * Otherwise, we enable the interrupts in the PHY.
633 * This should only be called with a valid IRQ number.
634 * Returns 0 on success or < 0 on error.
636 int phy_start_interrupts(struct phy_device *phydev)
638 atomic_set(&phydev->irq_disable, 0);
639 if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt",
641 pr_warn("%s: Can't get IRQ %d (PHY)\n",
642 phydev->bus->name, phydev->irq);
643 phydev->irq = PHY_POLL;
647 return phy_enable_interrupts(phydev);
649 EXPORT_SYMBOL(phy_start_interrupts);
652 * phy_stop_interrupts - disable interrupts from a PHY device
653 * @phydev: target phy_device struct
655 int phy_stop_interrupts(struct phy_device *phydev)
657 int err = phy_disable_interrupts(phydev);
662 free_irq(phydev->irq, phydev);
664 /* Cannot call flush_scheduled_work() here as desired because
665 * of rtnl_lock(), but we do not really care about what would
666 * be done, except from enable_irq(), so cancel any work
667 * possibly pending and take care of the matter below.
669 cancel_work_sync(&phydev->phy_queue);
670 /* If work indeed has been cancelled, disable_irq() will have
671 * been left unbalanced from phy_interrupt() and enable_irq()
672 * has to be called so that other devices on the line work.
674 while (atomic_dec_return(&phydev->irq_disable) >= 0)
675 enable_irq(phydev->irq);
679 EXPORT_SYMBOL(phy_stop_interrupts);
682 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
683 * @work: work_struct that describes the work to be done
685 void phy_change(struct work_struct *work)
687 struct phy_device *phydev =
688 container_of(work, struct phy_device, phy_queue);
690 if (phydev->drv->did_interrupt &&
691 !phydev->drv->did_interrupt(phydev))
694 if (phy_disable_interrupts(phydev))
697 mutex_lock(&phydev->lock);
698 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
699 phydev->state = PHY_CHANGELINK;
700 mutex_unlock(&phydev->lock);
702 atomic_dec(&phydev->irq_disable);
703 enable_irq(phydev->irq);
705 /* Reenable interrupts */
706 if (PHY_HALTED != phydev->state &&
707 phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
710 /* reschedule state queue work to run as soon as possible */
711 cancel_delayed_work_sync(&phydev->state_queue);
712 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
716 atomic_dec(&phydev->irq_disable);
717 enable_irq(phydev->irq);
721 disable_irq(phydev->irq);
722 atomic_inc(&phydev->irq_disable);
728 * phy_stop - Bring down the PHY link, and stop checking the status
729 * @phydev: target phy_device struct
731 void phy_stop(struct phy_device *phydev)
733 mutex_lock(&phydev->lock);
735 if (PHY_HALTED == phydev->state)
738 if (phy_interrupt_is_valid(phydev)) {
739 /* Disable PHY Interrupts */
740 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
742 /* Clear any pending interrupts */
743 phy_clear_interrupt(phydev);
746 phydev->state = PHY_HALTED;
749 mutex_unlock(&phydev->lock);
751 /* Cannot call flush_scheduled_work() here as desired because
752 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
753 * will not reenable interrupts.
756 EXPORT_SYMBOL(phy_stop);
759 * phy_start - start or restart a PHY device
760 * @phydev: target phy_device struct
762 * Description: Indicates the attached device's readiness to
763 * handle PHY-related work. Used during startup to start the
764 * PHY, and after a call to phy_stop() to resume operation.
765 * Also used to indicate the MDIO bus has cleared an error
768 void phy_start(struct phy_device *phydev)
770 bool do_resume = false;
773 mutex_lock(&phydev->lock);
775 switch (phydev->state) {
777 phydev->state = PHY_PENDING;
780 phydev->state = PHY_UP;
783 /* make sure interrupts are re-enabled for the PHY */
784 err = phy_enable_interrupts(phydev);
788 phydev->state = PHY_RESUMING;
794 mutex_unlock(&phydev->lock);
796 /* if phy was suspended, bring the physical link up again */
800 EXPORT_SYMBOL(phy_start);
803 * phy_state_machine - Handle the state machine
804 * @work: work_struct that describes the work to be done
806 void phy_state_machine(struct work_struct *work)
808 struct delayed_work *dwork = to_delayed_work(work);
809 struct phy_device *phydev =
810 container_of(dwork, struct phy_device, state_queue);
811 bool needs_aneg = false, do_suspend = false;
812 enum phy_state old_state;
816 mutex_lock(&phydev->lock);
818 old_state = phydev->state;
820 if (phydev->drv->link_change_notify)
821 phydev->drv->link_change_notify(phydev);
823 switch (phydev->state) {
832 phydev->link_timeout = PHY_AN_TIMEOUT;
836 err = phy_read_status(phydev);
840 /* If the link is down, give up on negotiation for now */
842 phydev->state = PHY_NOLINK;
843 netif_carrier_off(phydev->attached_dev);
844 phydev->adjust_link(phydev->attached_dev);
848 /* Check if negotiation is done. Break if there's an error */
849 err = phy_aneg_done(phydev);
853 /* If AN is done, we're running */
855 phydev->state = PHY_RUNNING;
856 netif_carrier_on(phydev->attached_dev);
857 phydev->adjust_link(phydev->attached_dev);
859 } else if (0 == phydev->link_timeout--)
863 err = phy_read_status(phydev);
868 if (AUTONEG_ENABLE == phydev->autoneg) {
869 err = phy_aneg_done(phydev);
874 phydev->state = PHY_AN;
875 phydev->link_timeout = PHY_AN_TIMEOUT;
879 phydev->state = PHY_RUNNING;
880 netif_carrier_on(phydev->attached_dev);
881 phydev->adjust_link(phydev->attached_dev);
885 err = genphy_update_link(phydev);
890 phydev->state = PHY_RUNNING;
891 netif_carrier_on(phydev->attached_dev);
893 if (0 == phydev->link_timeout--)
897 phydev->adjust_link(phydev->attached_dev);
900 /* Only register a CHANGE if we are polling or ignoring
901 * interrupts and link changed since latest checking.
903 if (!phy_interrupt_is_valid(phydev)) {
904 old_link = phydev->link;
905 err = phy_read_status(phydev);
909 if (old_link != phydev->link)
910 phydev->state = PHY_CHANGELINK;
914 err = phy_read_status(phydev);
919 phydev->state = PHY_RUNNING;
920 netif_carrier_on(phydev->attached_dev);
922 phydev->state = PHY_NOLINK;
923 netif_carrier_off(phydev->attached_dev);
926 phydev->adjust_link(phydev->attached_dev);
928 if (phy_interrupt_is_valid(phydev))
929 err = phy_config_interrupt(phydev,
930 PHY_INTERRUPT_ENABLED);
935 netif_carrier_off(phydev->attached_dev);
936 phydev->adjust_link(phydev->attached_dev);
941 if (AUTONEG_ENABLE == phydev->autoneg) {
942 err = phy_aneg_done(phydev);
946 /* err > 0 if AN is done.
947 * Otherwise, it's 0, and we're still waiting for AN
950 err = phy_read_status(phydev);
955 phydev->state = PHY_RUNNING;
956 netif_carrier_on(phydev->attached_dev);
958 phydev->state = PHY_NOLINK;
960 phydev->adjust_link(phydev->attached_dev);
962 phydev->state = PHY_AN;
963 phydev->link_timeout = PHY_AN_TIMEOUT;
966 err = phy_read_status(phydev);
971 phydev->state = PHY_RUNNING;
972 netif_carrier_on(phydev->attached_dev);
974 phydev->state = PHY_NOLINK;
976 phydev->adjust_link(phydev->attached_dev);
981 mutex_unlock(&phydev->lock);
984 err = phy_start_aneg(phydev);
991 dev_dbg(&phydev->dev, "PHY state change %s -> %s\n",
992 phy_state_to_str(old_state), phy_state_to_str(phydev->state));
994 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
995 PHY_STATE_TIME * HZ);
998 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1000 cancel_work_sync(&phydev->phy_queue);
1001 phydev->link = new_link;
1002 schedule_work(&phydev->phy_queue);
1004 EXPORT_SYMBOL(phy_mac_interrupt);
1006 static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
1009 /* Write the desired MMD Devad */
1010 bus->write(bus, addr, MII_MMD_CTRL, devad);
1012 /* Write the desired MMD register address */
1013 bus->write(bus, addr, MII_MMD_DATA, prtad);
1015 /* Select the Function : DATA with no post increment */
1016 bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
1020 * phy_read_mmd_indirect - reads data from the MMD registers
1021 * @phydev: The PHY device bus
1022 * @prtad: MMD Address
1024 * @addr: PHY address on the MII bus
1026 * Description: it reads data from the MMD registers (clause 22 to access to
1027 * clause 45) of the specified phy address.
1028 * To read these register we have:
1029 * 1) Write reg 13 // DEVAD
1030 * 2) Write reg 14 // MMD Address
1031 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1032 * 3) Read reg 14 // Read MMD data
1034 int phy_read_mmd_indirect(struct phy_device *phydev, int prtad,
1035 int devad, int addr)
1037 struct phy_driver *phydrv = phydev->drv;
1040 if (phydrv->read_mmd_indirect == NULL) {
1041 struct mii_bus *bus = phydev->bus;
1043 mutex_lock(&bus->mdio_lock);
1044 mmd_phy_indirect(bus, prtad, devad, addr);
1046 /* Read the content of the MMD's selected register */
1047 value = bus->read(bus, addr, MII_MMD_DATA);
1048 mutex_unlock(&bus->mdio_lock);
1050 value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr);
1054 EXPORT_SYMBOL(phy_read_mmd_indirect);
1057 * phy_write_mmd_indirect - writes data to the MMD registers
1058 * @phydev: The PHY device
1059 * @prtad: MMD Address
1061 * @addr: PHY address on the MII bus
1062 * @data: data to write in the MMD register
1064 * Description: Write data from the MMD registers of the specified
1066 * To write these register we have:
1067 * 1) Write reg 13 // DEVAD
1068 * 2) Write reg 14 // MMD Address
1069 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1070 * 3) Write reg 14 // Write MMD data
1072 void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
1073 int devad, int addr, u32 data)
1075 struct phy_driver *phydrv = phydev->drv;
1077 if (phydrv->write_mmd_indirect == NULL) {
1078 struct mii_bus *bus = phydev->bus;
1080 mutex_lock(&bus->mdio_lock);
1081 mmd_phy_indirect(bus, prtad, devad, addr);
1083 /* Write the data into MMD's selected register */
1084 bus->write(bus, addr, MII_MMD_DATA, data);
1085 mutex_unlock(&bus->mdio_lock);
1087 phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data);
1090 EXPORT_SYMBOL(phy_write_mmd_indirect);
1093 * phy_init_eee - init and check the EEE feature
1094 * @phydev: target phy_device struct
1095 * @clk_stop_enable: PHY may stop the clock during LPI
1097 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1098 * is supported by looking at the MMD registers 3.20 and 7.60/61
1099 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1102 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1104 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1105 * Also EEE feature is active when core is operating with MII, GMII
1106 * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1107 * should return an error if they do not support EEE.
1109 if ((phydev->duplex == DUPLEX_FULL) &&
1110 ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
1111 (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
1112 phy_interface_is_rgmii(phydev) ||
1113 phy_is_internal(phydev))) {
1114 int eee_lp, eee_cap, eee_adv;
1118 /* Read phy status to properly get the right settings */
1119 status = phy_read_status(phydev);
1123 /* First check if the EEE ability is supported */
1124 eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1125 MDIO_MMD_PCS, phydev->addr);
1129 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1133 /* Check which link settings negotiated and verify it in
1134 * the EEE advertising registers.
1136 eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1137 MDIO_MMD_AN, phydev->addr);
1141 eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1142 MDIO_MMD_AN, phydev->addr);
1146 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1147 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1148 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1151 if (clk_stop_enable) {
1152 /* Configure the PHY to stop receiving xMII
1153 * clock while it is signaling LPI.
1155 int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1,
1161 val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1162 phy_write_mmd_indirect(phydev, MDIO_CTRL1,
1163 MDIO_MMD_PCS, phydev->addr,
1167 return 0; /* EEE supported */
1170 return -EPROTONOSUPPORT;
1172 EXPORT_SYMBOL(phy_init_eee);
1175 * phy_get_eee_err - report the EEE wake error count
1176 * @phydev: target phy_device struct
1178 * Description: it is to report the number of time where the PHY
1179 * failed to complete its normal wake sequence.
1181 int phy_get_eee_err(struct phy_device *phydev)
1183 return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR,
1184 MDIO_MMD_PCS, phydev->addr);
1186 EXPORT_SYMBOL(phy_get_eee_err);
1189 * phy_ethtool_get_eee - get EEE supported and status
1190 * @phydev: target phy_device struct
1191 * @data: ethtool_eee data
1193 * Description: it reportes the Supported/Advertisement/LP Advertisement
1196 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1200 /* Get Supported EEE */
1201 val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1202 MDIO_MMD_PCS, phydev->addr);
1205 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1207 /* Get advertisement EEE */
1208 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1209 MDIO_MMD_AN, phydev->addr);
1212 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1214 /* Get LP advertisement EEE */
1215 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1216 MDIO_MMD_AN, phydev->addr);
1219 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1223 EXPORT_SYMBOL(phy_ethtool_get_eee);
1226 * phy_ethtool_set_eee - set EEE supported and status
1227 * @phydev: target phy_device struct
1228 * @data: ethtool_eee data
1230 * Description: it is to program the Advertisement EEE register.
1232 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1234 int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1236 phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN,
1241 EXPORT_SYMBOL(phy_ethtool_set_eee);
1243 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1245 if (phydev->drv->set_wol)
1246 return phydev->drv->set_wol(phydev, wol);
1250 EXPORT_SYMBOL(phy_ethtool_set_wol);
1252 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1254 if (phydev->drv->get_wol)
1255 phydev->drv->get_wol(phydev, wol);
1257 EXPORT_SYMBOL(phy_ethtool_get_wol);