1 // SPDX-License-Identifier: GPL-2.0+
2 /* Framework for configuring and reading PHY devices
3 * Based on code in sungem_phy.c and gianfar_phy.c
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * Copyright (c) 2006, 2007 Maciej W. Rozycki
11 #include <linux/kernel.h>
12 #include <linux/string.h>
13 #include <linux/errno.h>
14 #include <linux/unistd.h>
15 #include <linux/interrupt.h>
16 #include <linux/delay.h>
17 #include <linux/netdevice.h>
18 #include <linux/etherdevice.h>
19 #include <linux/skbuff.h>
21 #include <linux/module.h>
22 #include <linux/mii.h>
23 #include <linux/ethtool.h>
24 #include <linux/phy.h>
25 #include <linux/phy_led_triggers.h>
26 #include <linux/workqueue.h>
27 #include <linux/mdio.h>
29 #include <linux/uaccess.h>
30 #include <linux/atomic.h>
32 #define PHY_STATE_TIME HZ
34 #define PHY_STATE_STR(_state) \
36 return __stringify(_state); \
38 static const char *phy_state_to_str(enum phy_state st)
44 PHY_STATE_STR(RUNNING)
52 static void phy_link_up(struct phy_device *phydev)
54 phydev->phy_link_change(phydev, true, true);
55 phy_led_trigger_change_speed(phydev);
58 static void phy_link_down(struct phy_device *phydev, bool do_carrier)
60 phydev->phy_link_change(phydev, false, do_carrier);
61 phy_led_trigger_change_speed(phydev);
64 static const char *phy_pause_str(struct phy_device *phydev)
66 bool local_pause, local_asym_pause;
68 if (phydev->autoneg == AUTONEG_DISABLE)
71 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
73 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
76 if (local_pause && phydev->pause)
79 if (local_asym_pause && phydev->asym_pause) {
91 * phy_print_status - Convenience function to print out the current phy status
92 * @phydev: the phy_device struct
94 void phy_print_status(struct phy_device *phydev)
97 netdev_info(phydev->attached_dev,
98 "Link is Up - %s/%s - flow control %s\n",
99 phy_speed_to_str(phydev->speed),
100 phy_duplex_to_str(phydev->duplex),
101 phy_pause_str(phydev));
103 netdev_info(phydev->attached_dev, "Link is Down\n");
106 EXPORT_SYMBOL(phy_print_status);
109 * phy_clear_interrupt - Ack the phy device's interrupt
110 * @phydev: the phy_device struct
112 * If the @phydev driver has an ack_interrupt function, call it to
113 * ack and clear the phy device's interrupt.
115 * Returns 0 on success or < 0 on error.
117 static int phy_clear_interrupt(struct phy_device *phydev)
119 if (phydev->drv->ack_interrupt)
120 return phydev->drv->ack_interrupt(phydev);
126 * phy_config_interrupt - configure the PHY device for the requested interrupts
127 * @phydev: the phy_device struct
128 * @interrupts: interrupt flags to configure for this @phydev
130 * Returns 0 on success or < 0 on error.
132 static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
134 phydev->interrupts = interrupts ? 1 : 0;
135 if (phydev->drv->config_intr)
136 return phydev->drv->config_intr(phydev);
142 * phy_restart_aneg - restart auto-negotiation
143 * @phydev: target phy_device struct
145 * Restart the autonegotiation on @phydev. Returns >= 0 on success or
146 * negative errno on error.
148 int phy_restart_aneg(struct phy_device *phydev)
152 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
153 ret = genphy_c45_restart_aneg(phydev);
155 ret = genphy_restart_aneg(phydev);
159 EXPORT_SYMBOL_GPL(phy_restart_aneg);
162 * phy_aneg_done - return auto-negotiation status
163 * @phydev: target phy_device struct
165 * Description: Return the auto-negotiation status from this @phydev
166 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
169 int phy_aneg_done(struct phy_device *phydev)
171 if (phydev->drv && phydev->drv->aneg_done)
172 return phydev->drv->aneg_done(phydev);
173 else if (phydev->is_c45)
174 return genphy_c45_aneg_done(phydev);
176 return genphy_aneg_done(phydev);
178 EXPORT_SYMBOL(phy_aneg_done);
181 * phy_find_valid - find a PHY setting that matches the requested parameters
182 * @speed: desired speed
183 * @duplex: desired duplex
184 * @supported: mask of supported link modes
186 * Locate a supported phy setting that is, in priority order:
187 * - an exact match for the specified speed and duplex mode
188 * - a match for the specified speed, or slower speed
189 * - the slowest supported speed
190 * Returns the matched phy_setting entry, or %NULL if no supported phy
191 * settings were found.
193 static const struct phy_setting *
194 phy_find_valid(int speed, int duplex, unsigned long *supported)
196 return phy_lookup_setting(speed, duplex, supported, false);
200 * phy_supported_speeds - return all speeds currently supported by a phy device
201 * @phy: The phy device to return supported speeds of.
202 * @speeds: buffer to store supported speeds in.
203 * @size: size of speeds buffer.
205 * Description: Returns the number of supported speeds, and fills the speeds
206 * buffer with the supported speeds. If speeds buffer is too small to contain
207 * all currently supported speeds, will return as many speeds as can fit.
209 unsigned int phy_supported_speeds(struct phy_device *phy,
210 unsigned int *speeds,
213 return phy_speeds(speeds, size, phy->supported);
217 * phy_check_valid - check if there is a valid PHY setting which matches
218 * speed, duplex, and feature mask
219 * @speed: speed to match
220 * @duplex: duplex to match
221 * @features: A mask of the valid settings
223 * Description: Returns true if there is a valid setting, false otherwise.
225 static inline bool phy_check_valid(int speed, int duplex,
226 unsigned long *features)
228 return !!phy_lookup_setting(speed, duplex, features, true);
232 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
233 * @phydev: the target phy_device struct
235 * Description: Make sure the PHY is set to supported speeds and
236 * duplexes. Drop down by one in this order: 1000/FULL,
237 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
239 static void phy_sanitize_settings(struct phy_device *phydev)
241 const struct phy_setting *setting;
243 setting = phy_find_valid(phydev->speed, phydev->duplex,
246 phydev->speed = setting->speed;
247 phydev->duplex = setting->duplex;
249 /* We failed to find anything (no supported speeds?) */
250 phydev->speed = SPEED_UNKNOWN;
251 phydev->duplex = DUPLEX_UNKNOWN;
256 * phy_ethtool_sset - generic ethtool sset function, handles all the details
257 * @phydev: target phy_device struct
260 * A few notes about parameter checking:
262 * - We don't set port or transceiver, so we don't care what they
264 * - phy_start_aneg() will make sure forced settings are sane, and
265 * choose the next best ones from the ones selected, so we don't
266 * care if ethtool tries to give us bad values.
268 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
270 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
271 u32 speed = ethtool_cmd_speed(cmd);
273 if (cmd->phy_address != phydev->mdio.addr)
276 /* We make sure that we don't pass unsupported values in to the PHY */
277 ethtool_convert_legacy_u32_to_link_mode(advertising, cmd->advertising);
278 linkmode_and(advertising, advertising, phydev->supported);
280 /* Verify the settings we care about. */
281 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
284 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
287 if (cmd->autoneg == AUTONEG_DISABLE &&
288 ((speed != SPEED_1000 &&
289 speed != SPEED_100 &&
290 speed != SPEED_10) ||
291 (cmd->duplex != DUPLEX_HALF &&
292 cmd->duplex != DUPLEX_FULL)))
295 phydev->autoneg = cmd->autoneg;
297 phydev->speed = speed;
299 linkmode_copy(phydev->advertising, advertising);
301 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
302 phydev->advertising, AUTONEG_ENABLE == cmd->autoneg);
304 phydev->duplex = cmd->duplex;
306 phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
308 /* Restart the PHY */
309 phy_start_aneg(phydev);
313 EXPORT_SYMBOL(phy_ethtool_sset);
315 int phy_ethtool_ksettings_set(struct phy_device *phydev,
316 const struct ethtool_link_ksettings *cmd)
318 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
319 u8 autoneg = cmd->base.autoneg;
320 u8 duplex = cmd->base.duplex;
321 u32 speed = cmd->base.speed;
323 if (cmd->base.phy_address != phydev->mdio.addr)
326 linkmode_copy(advertising, cmd->link_modes.advertising);
328 /* We make sure that we don't pass unsupported values in to the PHY */
329 linkmode_and(advertising, advertising, phydev->supported);
331 /* Verify the settings we care about. */
332 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
335 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
338 if (autoneg == AUTONEG_DISABLE &&
339 ((speed != SPEED_1000 &&
340 speed != SPEED_100 &&
341 speed != SPEED_10) ||
342 (duplex != DUPLEX_HALF &&
343 duplex != DUPLEX_FULL)))
346 phydev->autoneg = autoneg;
348 phydev->speed = speed;
350 linkmode_copy(phydev->advertising, advertising);
352 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
353 phydev->advertising, autoneg == AUTONEG_ENABLE);
355 phydev->duplex = duplex;
357 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
359 /* Restart the PHY */
360 phy_start_aneg(phydev);
364 EXPORT_SYMBOL(phy_ethtool_ksettings_set);
366 void phy_ethtool_ksettings_get(struct phy_device *phydev,
367 struct ethtool_link_ksettings *cmd)
369 linkmode_copy(cmd->link_modes.supported, phydev->supported);
370 linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
371 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
373 cmd->base.speed = phydev->speed;
374 cmd->base.duplex = phydev->duplex;
375 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
376 cmd->base.port = PORT_BNC;
378 cmd->base.port = PORT_MII;
379 cmd->base.transceiver = phy_is_internal(phydev) ?
380 XCVR_INTERNAL : XCVR_EXTERNAL;
381 cmd->base.phy_address = phydev->mdio.addr;
382 cmd->base.autoneg = phydev->autoneg;
383 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
384 cmd->base.eth_tp_mdix = phydev->mdix;
386 EXPORT_SYMBOL(phy_ethtool_ksettings_get);
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;
407 mii_data->phy_id = phydev->mdio.addr;
411 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
412 prtad = mdio_phy_id_prtad(mii_data->phy_id);
413 devad = mdio_phy_id_devad(mii_data->phy_id);
414 devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
416 prtad = mii_data->phy_id;
417 devad = mii_data->reg_num;
419 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
424 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
425 prtad = mdio_phy_id_prtad(mii_data->phy_id);
426 devad = mdio_phy_id_devad(mii_data->phy_id);
427 devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
429 prtad = mii_data->phy_id;
430 devad = mii_data->reg_num;
432 if (prtad == phydev->mdio.addr) {
435 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
436 if (phydev->autoneg == AUTONEG_ENABLE)
437 change_autoneg = true;
438 phydev->autoneg = AUTONEG_DISABLE;
439 if (val & BMCR_FULLDPLX)
440 phydev->duplex = DUPLEX_FULL;
442 phydev->duplex = DUPLEX_HALF;
443 if (val & BMCR_SPEED1000)
444 phydev->speed = SPEED_1000;
445 else if (val & BMCR_SPEED100)
446 phydev->speed = SPEED_100;
447 else phydev->speed = SPEED_10;
450 if (phydev->autoneg == AUTONEG_DISABLE)
451 change_autoneg = true;
452 phydev->autoneg = AUTONEG_ENABLE;
456 mii_adv_mod_linkmode_adv_t(phydev->advertising,
458 change_autoneg = true;
466 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
468 if (prtad == phydev->mdio.addr &&
471 return phy_init_hw(phydev);
474 return phy_start_aneg(phydev);
479 if (phydev->drv && phydev->drv->hwtstamp)
480 return phydev->drv->hwtstamp(phydev, ifr);
487 EXPORT_SYMBOL(phy_mii_ioctl);
489 void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
491 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
494 EXPORT_SYMBOL(phy_queue_state_machine);
496 static void phy_trigger_machine(struct phy_device *phydev)
498 phy_queue_state_machine(phydev, 0);
501 static int phy_config_aneg(struct phy_device *phydev)
503 if (phydev->drv->config_aneg)
504 return phydev->drv->config_aneg(phydev);
506 /* Clause 45 PHYs that don't implement Clause 22 registers are not
507 * allowed to call genphy_config_aneg()
509 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
510 return genphy_c45_config_aneg(phydev);
512 return genphy_config_aneg(phydev);
516 * phy_check_link_status - check link status and set state accordingly
517 * @phydev: the phy_device struct
519 * Description: Check for link and whether autoneg was triggered / is running
520 * and set state accordingly
522 static int phy_check_link_status(struct phy_device *phydev)
526 WARN_ON(!mutex_is_locked(&phydev->lock));
528 /* Keep previous state if loopback is enabled because some PHYs
529 * report that Link is Down when loopback is enabled.
531 if (phydev->loopback_enabled)
534 err = phy_read_status(phydev);
538 if (phydev->link && phydev->state != PHY_RUNNING) {
539 phydev->state = PHY_RUNNING;
541 } else if (!phydev->link && phydev->state != PHY_NOLINK) {
542 phydev->state = PHY_NOLINK;
543 phy_link_down(phydev, true);
550 * phy_start_aneg - start auto-negotiation for this PHY device
551 * @phydev: the phy_device struct
553 * Description: Sanitizes the settings (if we're not autonegotiating
554 * them), and then calls the driver's config_aneg function.
555 * If the PHYCONTROL Layer is operating, we change the state to
556 * reflect the beginning of Auto-negotiation or forcing.
558 int phy_start_aneg(struct phy_device *phydev)
565 mutex_lock(&phydev->lock);
567 if (AUTONEG_DISABLE == phydev->autoneg)
568 phy_sanitize_settings(phydev);
570 /* Invalidate LP advertising flags */
571 linkmode_zero(phydev->lp_advertising);
573 err = phy_config_aneg(phydev);
577 if (phy_is_started(phydev))
578 err = phy_check_link_status(phydev);
580 mutex_unlock(&phydev->lock);
584 EXPORT_SYMBOL(phy_start_aneg);
586 static int phy_poll_aneg_done(struct phy_device *phydev)
588 unsigned int retries = 100;
593 ret = phy_aneg_done(phydev);
594 } while (!ret && --retries);
599 return ret < 0 ? ret : 0;
603 * phy_speed_down - set speed to lowest speed supported by both link partners
604 * @phydev: the phy_device struct
605 * @sync: perform action synchronously
607 * Description: Typically used to save energy when waiting for a WoL packet
609 * WARNING: Setting sync to false may cause the system being unable to suspend
610 * in case the PHY generates an interrupt when finishing the autonegotiation.
611 * This interrupt may wake up the system immediately after suspend.
612 * Therefore use sync = false only if you're sure it's safe with the respective
615 int phy_speed_down(struct phy_device *phydev, bool sync)
617 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
620 if (phydev->autoneg != AUTONEG_ENABLE)
623 linkmode_copy(adv_tmp, phydev->advertising);
625 ret = phy_speed_down_core(phydev);
629 linkmode_copy(phydev->adv_old, adv_tmp);
631 if (linkmode_equal(phydev->advertising, adv_tmp))
634 ret = phy_config_aneg(phydev);
638 return sync ? phy_poll_aneg_done(phydev) : 0;
640 EXPORT_SYMBOL_GPL(phy_speed_down);
643 * phy_speed_up - (re)set advertised speeds to all supported speeds
644 * @phydev: the phy_device struct
646 * Description: Used to revert the effect of phy_speed_down
648 int phy_speed_up(struct phy_device *phydev)
650 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
652 if (phydev->autoneg != AUTONEG_ENABLE)
655 if (linkmode_empty(phydev->adv_old))
658 linkmode_copy(adv_tmp, phydev->advertising);
659 linkmode_copy(phydev->advertising, phydev->adv_old);
660 linkmode_zero(phydev->adv_old);
662 if (linkmode_equal(phydev->advertising, adv_tmp))
665 return phy_config_aneg(phydev);
667 EXPORT_SYMBOL_GPL(phy_speed_up);
670 * phy_start_machine - start PHY state machine tracking
671 * @phydev: the phy_device struct
673 * Description: The PHY infrastructure can run a state machine
674 * which tracks whether the PHY is starting up, negotiating,
675 * etc. This function starts the delayed workqueue which tracks
676 * the state of the PHY. If you want to maintain your own state machine,
677 * do not call this function.
679 void phy_start_machine(struct phy_device *phydev)
681 phy_trigger_machine(phydev);
683 EXPORT_SYMBOL_GPL(phy_start_machine);
686 * phy_stop_machine - stop the PHY state machine tracking
687 * @phydev: target phy_device struct
689 * Description: Stops the state machine delayed workqueue, sets the
690 * state to UP (unless it wasn't up yet). This function must be
691 * called BEFORE phy_detach.
693 void phy_stop_machine(struct phy_device *phydev)
695 cancel_delayed_work_sync(&phydev->state_queue);
697 mutex_lock(&phydev->lock);
698 if (phy_is_started(phydev))
699 phydev->state = PHY_UP;
700 mutex_unlock(&phydev->lock);
704 * phy_error - enter HALTED state for this PHY device
705 * @phydev: target phy_device struct
707 * Moves the PHY to the HALTED state in response to a read
708 * or write error, and tells the controller the link is down.
709 * Must not be called from interrupt context, or while the
710 * phydev->lock is held.
712 static void phy_error(struct phy_device *phydev)
716 mutex_lock(&phydev->lock);
717 phydev->state = PHY_HALTED;
718 mutex_unlock(&phydev->lock);
720 phy_trigger_machine(phydev);
724 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
725 * @phydev: target phy_device struct
727 static int phy_disable_interrupts(struct phy_device *phydev)
731 /* Disable PHY interrupts */
732 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
736 /* Clear the interrupt */
737 return phy_clear_interrupt(phydev);
741 * phy_interrupt - PHY interrupt handler
742 * @irq: interrupt line
743 * @phy_dat: phy_device pointer
745 * Description: Handle PHY interrupt
747 static irqreturn_t phy_interrupt(int irq, void *phy_dat)
749 struct phy_device *phydev = phy_dat;
751 if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev))
754 if (phydev->drv->handle_interrupt) {
755 if (phydev->drv->handle_interrupt(phydev))
758 /* reschedule state queue work to run as soon as possible */
759 phy_trigger_machine(phydev);
762 if (phy_clear_interrupt(phydev))
772 * phy_enable_interrupts - Enable the interrupts from the PHY side
773 * @phydev: target phy_device struct
775 static int phy_enable_interrupts(struct phy_device *phydev)
777 int err = phy_clear_interrupt(phydev);
782 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
786 * phy_request_interrupt - request and enable interrupt for a PHY device
787 * @phydev: target phy_device struct
789 * Description: Request and enable the interrupt for the given PHY.
790 * If this fails, then we set irq to PHY_POLL.
791 * This should only be called with a valid IRQ number.
793 void phy_request_interrupt(struct phy_device *phydev)
797 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
798 IRQF_ONESHOT | IRQF_SHARED,
799 phydev_name(phydev), phydev);
801 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
803 phydev->irq = PHY_POLL;
805 if (phy_enable_interrupts(phydev)) {
806 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
807 phy_free_interrupt(phydev);
808 phydev->irq = PHY_POLL;
812 EXPORT_SYMBOL(phy_request_interrupt);
815 * phy_free_interrupt - disable and free interrupt for a PHY device
816 * @phydev: target phy_device struct
818 * Description: Disable and free the interrupt for the given PHY.
819 * This should only be called with a valid IRQ number.
821 void phy_free_interrupt(struct phy_device *phydev)
823 phy_disable_interrupts(phydev);
824 free_irq(phydev->irq, phydev);
826 EXPORT_SYMBOL(phy_free_interrupt);
829 * phy_stop - Bring down the PHY link, and stop checking the status
830 * @phydev: target phy_device struct
832 void phy_stop(struct phy_device *phydev)
834 if (!phy_is_started(phydev)) {
835 WARN(1, "called from state %s\n",
836 phy_state_to_str(phydev->state));
840 mutex_lock(&phydev->lock);
842 phydev->state = PHY_HALTED;
844 mutex_unlock(&phydev->lock);
846 phy_state_machine(&phydev->state_queue.work);
847 phy_stop_machine(phydev);
849 /* Cannot call flush_scheduled_work() here as desired because
850 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
851 * will not reenable interrupts.
854 EXPORT_SYMBOL(phy_stop);
857 * phy_start - start or restart a PHY device
858 * @phydev: target phy_device struct
860 * Description: Indicates the attached device's readiness to
861 * handle PHY-related work. Used during startup to start the
862 * PHY, and after a call to phy_stop() to resume operation.
863 * Also used to indicate the MDIO bus has cleared an error
866 void phy_start(struct phy_device *phydev)
868 mutex_lock(&phydev->lock);
870 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
871 WARN(1, "called from state %s\n",
872 phy_state_to_str(phydev->state));
876 /* if phy was suspended, bring the physical link up again */
877 __phy_resume(phydev);
879 phydev->state = PHY_UP;
881 phy_start_machine(phydev);
883 mutex_unlock(&phydev->lock);
885 EXPORT_SYMBOL(phy_start);
888 * phy_state_machine - Handle the state machine
889 * @work: work_struct that describes the work to be done
891 void phy_state_machine(struct work_struct *work)
893 struct delayed_work *dwork = to_delayed_work(work);
894 struct phy_device *phydev =
895 container_of(dwork, struct phy_device, state_queue);
896 bool needs_aneg = false, do_suspend = false;
897 enum phy_state old_state;
900 mutex_lock(&phydev->lock);
902 old_state = phydev->state;
904 switch (phydev->state) {
914 err = phy_check_link_status(phydev);
919 phy_link_down(phydev, true);
925 mutex_unlock(&phydev->lock);
928 err = phy_start_aneg(phydev);
935 if (old_state != phydev->state) {
936 phydev_dbg(phydev, "PHY state change %s -> %s\n",
937 phy_state_to_str(old_state),
938 phy_state_to_str(phydev->state));
939 if (phydev->drv && phydev->drv->link_change_notify)
940 phydev->drv->link_change_notify(phydev);
943 /* Only re-schedule a PHY state machine change if we are polling the
944 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
945 * between states from phy_mac_interrupt().
947 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
948 * state machine would be pointless and possibly error prone when
949 * called from phy_disconnect() synchronously.
951 mutex_lock(&phydev->lock);
952 if (phy_polling_mode(phydev) && phy_is_started(phydev))
953 phy_queue_state_machine(phydev, PHY_STATE_TIME);
954 mutex_unlock(&phydev->lock);
958 * phy_mac_interrupt - MAC says the link has changed
959 * @phydev: phy_device struct with changed link
961 * The MAC layer is able to indicate there has been a change in the PHY link
962 * status. Trigger the state machine and work a work queue.
964 void phy_mac_interrupt(struct phy_device *phydev)
966 /* Trigger a state machine change */
967 phy_trigger_machine(phydev);
969 EXPORT_SYMBOL(phy_mac_interrupt);
971 static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
973 linkmode_zero(advertising);
975 if (eee_adv & MDIO_EEE_100TX)
976 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
978 if (eee_adv & MDIO_EEE_1000T)
979 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
981 if (eee_adv & MDIO_EEE_10GT)
982 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
984 if (eee_adv & MDIO_EEE_1000KX)
985 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
987 if (eee_adv & MDIO_EEE_10GKX4)
988 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
990 if (eee_adv & MDIO_EEE_10GKR)
991 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
996 * phy_init_eee - init and check the EEE feature
997 * @phydev: target phy_device struct
998 * @clk_stop_enable: PHY may stop the clock during LPI
1000 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1001 * is supported by looking at the MMD registers 3.20 and 7.60/61
1002 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1005 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1010 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1012 if (phydev->duplex == DUPLEX_FULL) {
1013 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1014 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1015 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1016 int eee_lp, eee_cap, eee_adv;
1020 /* Read phy status to properly get the right settings */
1021 status = phy_read_status(phydev);
1025 /* First check if the EEE ability is supported */
1026 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1030 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1034 /* Check which link settings negotiated and verify it in
1035 * the EEE advertising registers.
1037 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1041 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1045 mmd_eee_adv_to_linkmode(adv, eee_adv);
1046 mmd_eee_adv_to_linkmode(lp, eee_lp);
1047 linkmode_and(common, adv, lp);
1049 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1052 if (clk_stop_enable)
1053 /* Configure the PHY to stop receiving xMII
1054 * clock while it is signaling LPI.
1056 phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1057 MDIO_PCS_CTRL1_CLKSTOP_EN);
1059 return 0; /* EEE supported */
1062 return -EPROTONOSUPPORT;
1064 EXPORT_SYMBOL(phy_init_eee);
1067 * phy_get_eee_err - report the EEE wake error count
1068 * @phydev: target phy_device struct
1070 * Description: it is to report the number of time where the PHY
1071 * failed to complete its normal wake sequence.
1073 int phy_get_eee_err(struct phy_device *phydev)
1078 return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1080 EXPORT_SYMBOL(phy_get_eee_err);
1083 * phy_ethtool_get_eee - get EEE supported and status
1084 * @phydev: target phy_device struct
1085 * @data: ethtool_eee data
1087 * Description: it reportes the Supported/Advertisement/LP Advertisement
1090 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1097 /* Get Supported EEE */
1098 val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1101 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1103 /* Get advertisement EEE */
1104 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1107 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1108 data->eee_enabled = !!data->advertised;
1110 /* Get LP advertisement EEE */
1111 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1114 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1116 data->eee_active = !!(data->advertised & data->lp_advertised);
1120 EXPORT_SYMBOL(phy_ethtool_get_eee);
1123 * phy_ethtool_set_eee - set EEE supported and status
1124 * @phydev: target phy_device struct
1125 * @data: ethtool_eee data
1127 * Description: it is to program the Advertisement EEE register.
1129 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1131 int cap, old_adv, adv = 0, ret;
1136 /* Get Supported EEE */
1137 cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1141 old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1145 if (data->eee_enabled) {
1146 adv = !data->advertised ? cap :
1147 ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1148 /* Mask prohibited EEE modes */
1149 adv &= ~phydev->eee_broken_modes;
1152 if (old_adv != adv) {
1153 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1157 /* Restart autonegotiation so the new modes get sent to the
1160 ret = phy_restart_aneg(phydev);
1167 EXPORT_SYMBOL(phy_ethtool_set_eee);
1169 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1171 if (phydev->drv && phydev->drv->set_wol)
1172 return phydev->drv->set_wol(phydev, wol);
1176 EXPORT_SYMBOL(phy_ethtool_set_wol);
1178 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1180 if (phydev->drv && phydev->drv->get_wol)
1181 phydev->drv->get_wol(phydev, wol);
1183 EXPORT_SYMBOL(phy_ethtool_get_wol);
1185 int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1186 struct ethtool_link_ksettings *cmd)
1188 struct phy_device *phydev = ndev->phydev;
1193 phy_ethtool_ksettings_get(phydev, cmd);
1197 EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1199 int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1200 const struct ethtool_link_ksettings *cmd)
1202 struct phy_device *phydev = ndev->phydev;
1207 return phy_ethtool_ksettings_set(phydev, cmd);
1209 EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1211 int phy_ethtool_nway_reset(struct net_device *ndev)
1213 struct phy_device *phydev = ndev->phydev;
1221 return phy_restart_aneg(phydev);
1223 EXPORT_SYMBOL(phy_ethtool_nway_reset);