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->mdio.addr)
325 /* We make sure that we don't pass unsupported values in to the PHY */
326 cmd->advertising &= phydev->supported;
328 /* Verify the settings we care about. */
329 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
332 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
335 if (cmd->autoneg == AUTONEG_DISABLE &&
336 ((speed != SPEED_1000 &&
337 speed != SPEED_100 &&
338 speed != SPEED_10) ||
339 (cmd->duplex != DUPLEX_HALF &&
340 cmd->duplex != DUPLEX_FULL)))
343 phydev->autoneg = cmd->autoneg;
345 phydev->speed = speed;
347 phydev->advertising = cmd->advertising;
349 if (AUTONEG_ENABLE == cmd->autoneg)
350 phydev->advertising |= ADVERTISED_Autoneg;
352 phydev->advertising &= ~ADVERTISED_Autoneg;
354 phydev->duplex = cmd->duplex;
356 phydev->mdix = cmd->eth_tp_mdix_ctrl;
358 /* Restart the PHY */
359 phy_start_aneg(phydev);
363 EXPORT_SYMBOL(phy_ethtool_sset);
365 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
367 cmd->supported = phydev->supported;
369 cmd->advertising = phydev->advertising;
370 cmd->lp_advertising = phydev->lp_advertising;
372 ethtool_cmd_speed_set(cmd, phydev->speed);
373 cmd->duplex = phydev->duplex;
374 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
375 cmd->port = PORT_BNC;
377 cmd->port = PORT_MII;
378 cmd->phy_address = phydev->mdio.addr;
379 cmd->transceiver = phy_is_internal(phydev) ?
380 XCVR_INTERNAL : XCVR_EXTERNAL;
381 cmd->autoneg = phydev->autoneg;
382 cmd->eth_tp_mdix_ctrl = phydev->mdix;
386 EXPORT_SYMBOL(phy_ethtool_gset);
389 * phy_mii_ioctl - generic PHY MII ioctl interface
390 * @phydev: the phy_device struct
391 * @ifr: &struct ifreq for socket ioctl's
392 * @cmd: ioctl cmd to execute
394 * Note that this function is currently incompatible with the
395 * PHYCONTROL layer. It changes registers without regard to
396 * current state. Use at own risk.
398 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
400 struct mii_ioctl_data *mii_data = if_mii(ifr);
401 u16 val = mii_data->val_in;
402 bool change_autoneg = false;
406 mii_data->phy_id = phydev->mdio.addr;
410 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
416 if (mii_data->phy_id == phydev->mdio.addr) {
417 switch (mii_data->reg_num) {
419 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
420 if (phydev->autoneg == AUTONEG_ENABLE)
421 change_autoneg = true;
422 phydev->autoneg = AUTONEG_DISABLE;
423 if (val & BMCR_FULLDPLX)
424 phydev->duplex = DUPLEX_FULL;
426 phydev->duplex = DUPLEX_HALF;
427 if (val & BMCR_SPEED1000)
428 phydev->speed = SPEED_1000;
429 else if (val & BMCR_SPEED100)
430 phydev->speed = SPEED_100;
431 else phydev->speed = SPEED_10;
434 if (phydev->autoneg == AUTONEG_DISABLE)
435 change_autoneg = true;
436 phydev->autoneg = AUTONEG_ENABLE;
440 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
441 change_autoneg = true;
449 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
450 mii_data->reg_num, val);
452 if (mii_data->phy_id == phydev->mdio.addr &&
453 mii_data->reg_num == MII_BMCR &&
455 return phy_init_hw(phydev);
458 return phy_start_aneg(phydev);
463 if (phydev->drv->hwtstamp)
464 return phydev->drv->hwtstamp(phydev, ifr);
471 EXPORT_SYMBOL(phy_mii_ioctl);
474 * phy_start_aneg - start auto-negotiation for this PHY device
475 * @phydev: the phy_device struct
477 * Description: Sanitizes the settings (if we're not autonegotiating
478 * them), and then calls the driver's config_aneg function.
479 * If the PHYCONTROL Layer is operating, we change the state to
480 * reflect the beginning of Auto-negotiation or forcing.
482 int phy_start_aneg(struct phy_device *phydev)
486 mutex_lock(&phydev->lock);
488 if (AUTONEG_DISABLE == phydev->autoneg)
489 phy_sanitize_settings(phydev);
491 /* Invalidate LP advertising flags */
492 phydev->lp_advertising = 0;
494 err = phydev->drv->config_aneg(phydev);
498 if (phydev->state != PHY_HALTED) {
499 if (AUTONEG_ENABLE == phydev->autoneg) {
500 phydev->state = PHY_AN;
501 phydev->link_timeout = PHY_AN_TIMEOUT;
503 phydev->state = PHY_FORCING;
504 phydev->link_timeout = PHY_FORCE_TIMEOUT;
509 mutex_unlock(&phydev->lock);
512 EXPORT_SYMBOL(phy_start_aneg);
515 * phy_start_machine - start PHY state machine tracking
516 * @phydev: the phy_device struct
518 * Description: The PHY infrastructure can run a state machine
519 * which tracks whether the PHY is starting up, negotiating,
520 * etc. This function starts the timer which tracks the state
521 * of the PHY. If you want to maintain your own state machine,
522 * do not call this function.
524 void phy_start_machine(struct phy_device *phydev)
526 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
530 * phy_stop_machine - stop the PHY state machine tracking
531 * @phydev: target phy_device struct
533 * Description: Stops the state machine timer, sets the state to UP
534 * (unless it wasn't up yet). This function must be called BEFORE
537 void phy_stop_machine(struct phy_device *phydev)
539 cancel_delayed_work_sync(&phydev->state_queue);
541 mutex_lock(&phydev->lock);
542 if (phydev->state > PHY_UP)
543 phydev->state = PHY_UP;
544 mutex_unlock(&phydev->lock);
548 * phy_error - enter HALTED state for this PHY device
549 * @phydev: target phy_device struct
551 * Moves the PHY to the HALTED state in response to a read
552 * or write error, and tells the controller the link is down.
553 * Must not be called from interrupt context, or while the
554 * phydev->lock is held.
556 static void phy_error(struct phy_device *phydev)
558 mutex_lock(&phydev->lock);
559 phydev->state = PHY_HALTED;
560 mutex_unlock(&phydev->lock);
564 * phy_interrupt - PHY interrupt handler
565 * @irq: interrupt line
566 * @phy_dat: phy_device pointer
568 * Description: When a PHY interrupt occurs, the handler disables
569 * interrupts, and schedules a work task to clear the interrupt.
571 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
573 struct phy_device *phydev = phy_dat;
575 if (PHY_HALTED == phydev->state)
576 return IRQ_NONE; /* It can't be ours. */
578 /* The MDIO bus is not allowed to be written in interrupt
579 * context, so we need to disable the irq here. A work
580 * queue will write the PHY to disable and clear the
581 * interrupt, and then reenable the irq line.
583 disable_irq_nosync(irq);
584 atomic_inc(&phydev->irq_disable);
586 queue_work(system_power_efficient_wq, &phydev->phy_queue);
592 * phy_enable_interrupts - Enable the interrupts from the PHY side
593 * @phydev: target phy_device struct
595 static int phy_enable_interrupts(struct phy_device *phydev)
597 int err = phy_clear_interrupt(phydev);
602 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
606 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
607 * @phydev: target phy_device struct
609 static int phy_disable_interrupts(struct phy_device *phydev)
613 /* Disable PHY interrupts */
614 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
618 /* Clear the interrupt */
619 err = phy_clear_interrupt(phydev);
632 * phy_start_interrupts - request and enable interrupts for a PHY device
633 * @phydev: target phy_device struct
635 * Description: Request the interrupt for the given PHY.
636 * If this fails, then we set irq to PHY_POLL.
637 * Otherwise, we enable the interrupts in the PHY.
638 * This should only be called with a valid IRQ number.
639 * Returns 0 on success or < 0 on error.
641 int phy_start_interrupts(struct phy_device *phydev)
643 atomic_set(&phydev->irq_disable, 0);
644 if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt",
646 pr_warn("%s: Can't get IRQ %d (PHY)\n",
647 phydev->mdio.bus->name, phydev->irq);
648 phydev->irq = PHY_POLL;
652 return phy_enable_interrupts(phydev);
654 EXPORT_SYMBOL(phy_start_interrupts);
657 * phy_stop_interrupts - disable interrupts from a PHY device
658 * @phydev: target phy_device struct
660 int phy_stop_interrupts(struct phy_device *phydev)
662 int err = phy_disable_interrupts(phydev);
667 free_irq(phydev->irq, phydev);
669 /* Cannot call flush_scheduled_work() here as desired because
670 * of rtnl_lock(), but we do not really care about what would
671 * be done, except from enable_irq(), so cancel any work
672 * possibly pending and take care of the matter below.
674 cancel_work_sync(&phydev->phy_queue);
675 /* If work indeed has been cancelled, disable_irq() will have
676 * been left unbalanced from phy_interrupt() and enable_irq()
677 * has to be called so that other devices on the line work.
679 while (atomic_dec_return(&phydev->irq_disable) >= 0)
680 enable_irq(phydev->irq);
684 EXPORT_SYMBOL(phy_stop_interrupts);
687 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
688 * @work: work_struct that describes the work to be done
690 void phy_change(struct work_struct *work)
692 struct phy_device *phydev =
693 container_of(work, struct phy_device, phy_queue);
695 if (phy_interrupt_is_valid(phydev)) {
696 if (phydev->drv->did_interrupt &&
697 !phydev->drv->did_interrupt(phydev))
700 if (phy_disable_interrupts(phydev))
704 mutex_lock(&phydev->lock);
705 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
706 phydev->state = PHY_CHANGELINK;
707 mutex_unlock(&phydev->lock);
709 if (phy_interrupt_is_valid(phydev)) {
710 atomic_dec(&phydev->irq_disable);
711 enable_irq(phydev->irq);
713 /* Reenable interrupts */
714 if (PHY_HALTED != phydev->state &&
715 phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
719 /* reschedule state queue work to run as soon as possible */
720 cancel_delayed_work_sync(&phydev->state_queue);
721 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
725 atomic_dec(&phydev->irq_disable);
726 enable_irq(phydev->irq);
730 disable_irq(phydev->irq);
731 atomic_inc(&phydev->irq_disable);
737 * phy_stop - Bring down the PHY link, and stop checking the status
738 * @phydev: target phy_device struct
740 void phy_stop(struct phy_device *phydev)
742 mutex_lock(&phydev->lock);
744 if (PHY_HALTED == phydev->state)
747 if (phy_interrupt_is_valid(phydev)) {
748 /* Disable PHY Interrupts */
749 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
751 /* Clear any pending interrupts */
752 phy_clear_interrupt(phydev);
755 phydev->state = PHY_HALTED;
758 mutex_unlock(&phydev->lock);
760 /* Cannot call flush_scheduled_work() here as desired because
761 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
762 * will not reenable interrupts.
765 EXPORT_SYMBOL(phy_stop);
768 * phy_start - start or restart a PHY device
769 * @phydev: target phy_device struct
771 * Description: Indicates the attached device's readiness to
772 * handle PHY-related work. Used during startup to start the
773 * PHY, and after a call to phy_stop() to resume operation.
774 * Also used to indicate the MDIO bus has cleared an error
777 void phy_start(struct phy_device *phydev)
779 bool do_resume = false;
782 mutex_lock(&phydev->lock);
784 switch (phydev->state) {
786 phydev->state = PHY_PENDING;
789 phydev->state = PHY_UP;
792 /* make sure interrupts are re-enabled for the PHY */
793 if (phydev->irq != PHY_POLL) {
794 err = phy_enable_interrupts(phydev);
799 phydev->state = PHY_RESUMING;
805 mutex_unlock(&phydev->lock);
807 /* if phy was suspended, bring the physical link up again */
811 EXPORT_SYMBOL(phy_start);
814 * phy_state_machine - Handle the state machine
815 * @work: work_struct that describes the work to be done
817 void phy_state_machine(struct work_struct *work)
819 struct delayed_work *dwork = to_delayed_work(work);
820 struct phy_device *phydev =
821 container_of(dwork, struct phy_device, state_queue);
822 bool needs_aneg = false, do_suspend = false;
823 enum phy_state old_state;
827 mutex_lock(&phydev->lock);
829 old_state = phydev->state;
831 if (phydev->drv->link_change_notify)
832 phydev->drv->link_change_notify(phydev);
834 switch (phydev->state) {
843 phydev->link_timeout = PHY_AN_TIMEOUT;
847 err = phy_read_status(phydev);
851 /* If the link is down, give up on negotiation for now */
853 phydev->state = PHY_NOLINK;
854 netif_carrier_off(phydev->attached_dev);
855 phydev->adjust_link(phydev->attached_dev);
859 /* Check if negotiation is done. Break if there's an error */
860 err = phy_aneg_done(phydev);
864 /* If AN is done, we're running */
866 phydev->state = PHY_RUNNING;
867 netif_carrier_on(phydev->attached_dev);
868 phydev->adjust_link(phydev->attached_dev);
870 } else if (0 == phydev->link_timeout--)
874 if (phy_interrupt_is_valid(phydev))
877 err = phy_read_status(phydev);
882 if (AUTONEG_ENABLE == phydev->autoneg) {
883 err = phy_aneg_done(phydev);
888 phydev->state = PHY_AN;
889 phydev->link_timeout = PHY_AN_TIMEOUT;
893 phydev->state = PHY_RUNNING;
894 netif_carrier_on(phydev->attached_dev);
895 phydev->adjust_link(phydev->attached_dev);
899 err = genphy_update_link(phydev);
904 phydev->state = PHY_RUNNING;
905 netif_carrier_on(phydev->attached_dev);
907 if (0 == phydev->link_timeout--)
911 phydev->adjust_link(phydev->attached_dev);
914 /* Only register a CHANGE if we are polling and link changed
915 * since latest checking.
917 if (phydev->irq == PHY_POLL) {
918 old_link = phydev->link;
919 err = phy_read_status(phydev);
923 if (old_link != phydev->link)
924 phydev->state = PHY_CHANGELINK;
928 err = phy_read_status(phydev);
933 phydev->state = PHY_RUNNING;
934 netif_carrier_on(phydev->attached_dev);
936 phydev->state = PHY_NOLINK;
937 netif_carrier_off(phydev->attached_dev);
940 phydev->adjust_link(phydev->attached_dev);
942 if (phy_interrupt_is_valid(phydev))
943 err = phy_config_interrupt(phydev,
944 PHY_INTERRUPT_ENABLED);
949 netif_carrier_off(phydev->attached_dev);
950 phydev->adjust_link(phydev->attached_dev);
955 if (AUTONEG_ENABLE == phydev->autoneg) {
956 err = phy_aneg_done(phydev);
960 /* err > 0 if AN is done.
961 * Otherwise, it's 0, and we're still waiting for AN
964 err = phy_read_status(phydev);
969 phydev->state = PHY_RUNNING;
970 netif_carrier_on(phydev->attached_dev);
972 phydev->state = PHY_NOLINK;
974 phydev->adjust_link(phydev->attached_dev);
976 phydev->state = PHY_AN;
977 phydev->link_timeout = PHY_AN_TIMEOUT;
980 err = phy_read_status(phydev);
985 phydev->state = PHY_RUNNING;
986 netif_carrier_on(phydev->attached_dev);
988 phydev->state = PHY_NOLINK;
990 phydev->adjust_link(phydev->attached_dev);
995 mutex_unlock(&phydev->lock);
998 err = phy_start_aneg(phydev);
1000 phy_suspend(phydev);
1005 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1006 phy_state_to_str(old_state),
1007 phy_state_to_str(phydev->state));
1009 /* Only re-schedule a PHY state machine change if we are polling the
1010 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1011 * between states from phy_mac_interrupt()
1013 if (phydev->irq == PHY_POLL)
1014 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1015 PHY_STATE_TIME * HZ);
1018 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1020 phydev->link = new_link;
1022 /* Trigger a state machine change */
1023 queue_work(system_power_efficient_wq, &phydev->phy_queue);
1025 EXPORT_SYMBOL(phy_mac_interrupt);
1027 static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
1030 /* Write the desired MMD Devad */
1031 bus->write(bus, addr, MII_MMD_CTRL, devad);
1033 /* Write the desired MMD register address */
1034 bus->write(bus, addr, MII_MMD_DATA, prtad);
1036 /* Select the Function : DATA with no post increment */
1037 bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
1041 * phy_read_mmd_indirect - reads data from the MMD registers
1042 * @phydev: The PHY device bus
1043 * @prtad: MMD Address
1046 * Description: it reads data from the MMD registers (clause 22 to access to
1047 * clause 45) of the specified phy address.
1048 * To read these register we have:
1049 * 1) Write reg 13 // DEVAD
1050 * 2) Write reg 14 // MMD Address
1051 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1052 * 3) Read reg 14 // Read MMD data
1054 int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad)
1056 struct phy_driver *phydrv = phydev->drv;
1057 int addr = phydev->mdio.addr;
1060 if (!phydrv->read_mmd_indirect) {
1061 struct mii_bus *bus = phydev->mdio.bus;
1063 mutex_lock(&bus->mdio_lock);
1064 mmd_phy_indirect(bus, prtad, devad, addr);
1066 /* Read the content of the MMD's selected register */
1067 value = bus->read(bus, addr, MII_MMD_DATA);
1068 mutex_unlock(&bus->mdio_lock);
1070 value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr);
1074 EXPORT_SYMBOL(phy_read_mmd_indirect);
1077 * phy_write_mmd_indirect - writes data to the MMD registers
1078 * @phydev: The PHY device
1079 * @prtad: MMD Address
1081 * @data: data to write in the MMD register
1083 * Description: Write data from the MMD registers of the specified
1085 * To write these register we have:
1086 * 1) Write reg 13 // DEVAD
1087 * 2) Write reg 14 // MMD Address
1088 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1089 * 3) Write reg 14 // Write MMD data
1091 void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
1092 int devad, u32 data)
1094 struct phy_driver *phydrv = phydev->drv;
1095 int addr = phydev->mdio.addr;
1097 if (!phydrv->write_mmd_indirect) {
1098 struct mii_bus *bus = phydev->mdio.bus;
1100 mutex_lock(&bus->mdio_lock);
1101 mmd_phy_indirect(bus, prtad, devad, addr);
1103 /* Write the data into MMD's selected register */
1104 bus->write(bus, addr, MII_MMD_DATA, data);
1105 mutex_unlock(&bus->mdio_lock);
1107 phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data);
1110 EXPORT_SYMBOL(phy_write_mmd_indirect);
1113 * phy_init_eee - init and check the EEE feature
1114 * @phydev: target phy_device struct
1115 * @clk_stop_enable: PHY may stop the clock during LPI
1117 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1118 * is supported by looking at the MMD registers 3.20 and 7.60/61
1119 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1122 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1124 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1125 * Also EEE feature is active when core is operating with MII, GMII
1126 * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1127 * should return an error if they do not support EEE.
1129 if ((phydev->duplex == DUPLEX_FULL) &&
1130 ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
1131 (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
1132 phy_interface_is_rgmii(phydev) ||
1133 phy_is_internal(phydev))) {
1134 int eee_lp, eee_cap, eee_adv;
1138 /* Read phy status to properly get the right settings */
1139 status = phy_read_status(phydev);
1143 /* First check if the EEE ability is supported */
1144 eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1149 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1153 /* Check which link settings negotiated and verify it in
1154 * the EEE advertising registers.
1156 eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1161 eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1166 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1167 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1168 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1171 if (clk_stop_enable) {
1172 /* Configure the PHY to stop receiving xMII
1173 * clock while it is signaling LPI.
1175 int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1,
1180 val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1181 phy_write_mmd_indirect(phydev, MDIO_CTRL1,
1185 return 0; /* EEE supported */
1188 return -EPROTONOSUPPORT;
1190 EXPORT_SYMBOL(phy_init_eee);
1193 * phy_get_eee_err - report the EEE wake error count
1194 * @phydev: target phy_device struct
1196 * Description: it is to report the number of time where the PHY
1197 * failed to complete its normal wake sequence.
1199 int phy_get_eee_err(struct phy_device *phydev)
1201 return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, MDIO_MMD_PCS);
1203 EXPORT_SYMBOL(phy_get_eee_err);
1206 * phy_ethtool_get_eee - get EEE supported and status
1207 * @phydev: target phy_device struct
1208 * @data: ethtool_eee data
1210 * Description: it reportes the Supported/Advertisement/LP Advertisement
1213 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1217 /* Get Supported EEE */
1218 val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, MDIO_MMD_PCS);
1221 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1223 /* Get advertisement EEE */
1224 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
1227 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1229 /* Get LP advertisement EEE */
1230 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, MDIO_MMD_AN);
1233 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1237 EXPORT_SYMBOL(phy_ethtool_get_eee);
1240 * phy_ethtool_set_eee - set EEE supported and status
1241 * @phydev: target phy_device struct
1242 * @data: ethtool_eee data
1244 * Description: it is to program the Advertisement EEE register.
1246 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1248 int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1250 phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
1254 EXPORT_SYMBOL(phy_ethtool_set_eee);
1256 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1258 if (phydev->drv->set_wol)
1259 return phydev->drv->set_wol(phydev, wol);
1263 EXPORT_SYMBOL(phy_ethtool_set_wol);
1265 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1267 if (phydev->drv->get_wol)
1268 phydev->drv->get_wol(phydev, wol);
1270 EXPORT_SYMBOL(phy_ethtool_get_wol);