1 /* Framework for configuring and reading PHY devices
2 * Based on code in sungem_phy.c and gianfar_phy.c
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
7 * Copyright (c) 2006, 2007 Maciej W. Rozycki
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
16 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18 #include <linux/kernel.h>
19 #include <linux/string.h>
20 #include <linux/errno.h>
21 #include <linux/unistd.h>
22 #include <linux/interrupt.h>
23 #include <linux/delay.h>
24 #include <linux/netdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/skbuff.h>
28 #include <linux/module.h>
29 #include <linux/mii.h>
30 #include <linux/ethtool.h>
31 #include <linux/phy.h>
32 #include <linux/timer.h>
33 #include <linux/workqueue.h>
34 #include <linux/mdio.h>
36 #include <linux/uaccess.h>
37 #include <linux/atomic.h>
41 static const char *phy_speed_to_str(int speed)
57 return "Unsupported (update phy.c)";
62 * phy_print_status - Convenience function to print out the current phy status
63 * @phydev: the phy_device struct
65 void phy_print_status(struct phy_device *phydev)
68 netdev_info(phydev->attached_dev,
69 "Link is Up - %s/%s - flow control %s\n",
70 phy_speed_to_str(phydev->speed),
71 DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
72 phydev->pause ? "rx/tx" : "off");
74 netdev_info(phydev->attached_dev, "Link is Down\n");
77 EXPORT_SYMBOL(phy_print_status);
80 * phy_clear_interrupt - Ack the phy device's interrupt
81 * @phydev: the phy_device struct
83 * If the @phydev driver has an ack_interrupt function, call it to
84 * ack and clear the phy device's interrupt.
86 * Returns 0 on success or < 0 on error.
88 static int phy_clear_interrupt(struct phy_device *phydev)
90 if (phydev->drv->ack_interrupt)
91 return phydev->drv->ack_interrupt(phydev);
97 * phy_config_interrupt - configure the PHY device for the requested interrupts
98 * @phydev: the phy_device struct
99 * @interrupts: interrupt flags to configure for this @phydev
101 * Returns 0 on success or < 0 on error.
103 static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
105 phydev->interrupts = interrupts;
106 if (phydev->drv->config_intr)
107 return phydev->drv->config_intr(phydev);
114 * phy_aneg_done - return auto-negotiation status
115 * @phydev: target phy_device struct
117 * Description: Return the auto-negotiation status from this @phydev
118 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
121 static inline int phy_aneg_done(struct phy_device *phydev)
123 if (phydev->drv->aneg_done)
124 return phydev->drv->aneg_done(phydev);
126 return genphy_aneg_done(phydev);
129 /* A structure for mapping a particular speed and duplex
130 * combination to a particular SUPPORTED and ADVERTISED value
138 /* A mapping of all SUPPORTED settings to speed/duplex */
139 static const struct phy_setting settings[] = {
142 .duplex = DUPLEX_FULL,
143 .setting = SUPPORTED_10000baseT_Full,
147 .duplex = DUPLEX_FULL,
148 .setting = SUPPORTED_1000baseT_Full,
152 .duplex = DUPLEX_HALF,
153 .setting = SUPPORTED_1000baseT_Half,
157 .duplex = DUPLEX_FULL,
158 .setting = SUPPORTED_100baseT_Full,
162 .duplex = DUPLEX_HALF,
163 .setting = SUPPORTED_100baseT_Half,
167 .duplex = DUPLEX_FULL,
168 .setting = SUPPORTED_10baseT_Full,
172 .duplex = DUPLEX_HALF,
173 .setting = SUPPORTED_10baseT_Half,
177 #define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
180 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
181 * @speed: speed to match
182 * @duplex: duplex to match
184 * Description: Searches the settings array for the setting which
185 * matches the desired speed and duplex, and returns the index
186 * of that setting. Returns the index of the last setting if
187 * none of the others match.
189 static inline unsigned int phy_find_setting(int speed, int duplex)
191 unsigned int idx = 0;
193 while (idx < ARRAY_SIZE(settings) &&
194 (settings[idx].speed != speed || settings[idx].duplex != duplex))
197 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
201 * phy_find_valid - find a PHY setting that matches the requested features mask
202 * @idx: The first index in settings[] to search
203 * @features: A mask of the valid settings
205 * Description: Returns the index of the first valid setting less
206 * than or equal to the one pointed to by idx, as determined by
207 * the mask in features. Returns the index of the last setting
208 * if nothing else matches.
210 static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
212 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
215 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
219 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
220 * @phydev: the target phy_device struct
222 * Description: Make sure the PHY is set to supported speeds and
223 * duplexes. Drop down by one in this order: 1000/FULL,
224 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
226 static void phy_sanitize_settings(struct phy_device *phydev)
228 u32 features = phydev->supported;
231 /* Sanitize settings based on PHY capabilities */
232 if ((features & SUPPORTED_Autoneg) == 0)
233 phydev->autoneg = AUTONEG_DISABLE;
235 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
238 phydev->speed = settings[idx].speed;
239 phydev->duplex = settings[idx].duplex;
243 * phy_ethtool_sset - generic ethtool sset function, handles all the details
244 * @phydev: target phy_device struct
247 * A few notes about parameter checking:
248 * - We don't set port or transceiver, so we don't care what they
250 * - phy_start_aneg() will make sure forced settings are sane, and
251 * choose the next best ones from the ones selected, so we don't
252 * care if ethtool tries to give us bad values.
254 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
256 u32 speed = ethtool_cmd_speed(cmd);
258 if (cmd->phy_address != phydev->addr)
261 /* We make sure that we don't pass unsupported values in to the PHY */
262 cmd->advertising &= phydev->supported;
264 /* Verify the settings we care about. */
265 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
268 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
271 if (cmd->autoneg == AUTONEG_DISABLE &&
272 ((speed != SPEED_1000 &&
273 speed != SPEED_100 &&
274 speed != SPEED_10) ||
275 (cmd->duplex != DUPLEX_HALF &&
276 cmd->duplex != DUPLEX_FULL)))
279 phydev->autoneg = cmd->autoneg;
281 phydev->speed = speed;
283 phydev->advertising = cmd->advertising;
285 if (AUTONEG_ENABLE == cmd->autoneg)
286 phydev->advertising |= ADVERTISED_Autoneg;
288 phydev->advertising &= ~ADVERTISED_Autoneg;
290 phydev->duplex = cmd->duplex;
292 /* Restart the PHY */
293 phy_start_aneg(phydev);
297 EXPORT_SYMBOL(phy_ethtool_sset);
299 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
301 cmd->supported = phydev->supported;
303 cmd->advertising = phydev->advertising;
304 cmd->lp_advertising = phydev->lp_advertising;
306 ethtool_cmd_speed_set(cmd, phydev->speed);
307 cmd->duplex = phydev->duplex;
308 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
309 cmd->port = PORT_BNC;
311 cmd->port = PORT_MII;
312 cmd->phy_address = phydev->addr;
313 cmd->transceiver = phy_is_internal(phydev) ?
314 XCVR_INTERNAL : XCVR_EXTERNAL;
315 cmd->autoneg = phydev->autoneg;
319 EXPORT_SYMBOL(phy_ethtool_gset);
322 * phy_mii_ioctl - generic PHY MII ioctl interface
323 * @phydev: the phy_device struct
324 * @ifr: &struct ifreq for socket ioctl's
325 * @cmd: ioctl cmd to execute
327 * Note that this function is currently incompatible with the
328 * PHYCONTROL layer. It changes registers without regard to
329 * current state. Use at own risk.
331 int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
333 struct mii_ioctl_data *mii_data = if_mii(ifr);
334 u16 val = mii_data->val_in;
338 mii_data->phy_id = phydev->addr;
342 mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id,
347 if (mii_data->phy_id == phydev->addr) {
348 switch (mii_data->reg_num) {
350 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0)
351 phydev->autoneg = AUTONEG_DISABLE;
353 phydev->autoneg = AUTONEG_ENABLE;
354 if (!phydev->autoneg && (val & BMCR_FULLDPLX))
355 phydev->duplex = DUPLEX_FULL;
357 phydev->duplex = DUPLEX_HALF;
358 if (!phydev->autoneg && (val & BMCR_SPEED1000))
359 phydev->speed = SPEED_1000;
360 else if (!phydev->autoneg &&
361 (val & BMCR_SPEED100))
362 phydev->speed = SPEED_100;
365 phydev->advertising = val;
373 mdiobus_write(phydev->bus, mii_data->phy_id,
374 mii_data->reg_num, val);
376 if (mii_data->reg_num == MII_BMCR &&
378 return phy_init_hw(phydev);
382 if (phydev->drv->hwtstamp)
383 return phydev->drv->hwtstamp(phydev, ifr);
390 EXPORT_SYMBOL(phy_mii_ioctl);
393 * phy_start_aneg - start auto-negotiation for this PHY device
394 * @phydev: the phy_device struct
396 * Description: Sanitizes the settings (if we're not autonegotiating
397 * them), and then calls the driver's config_aneg function.
398 * If the PHYCONTROL Layer is operating, we change the state to
399 * reflect the beginning of Auto-negotiation or forcing.
401 int phy_start_aneg(struct phy_device *phydev)
405 mutex_lock(&phydev->lock);
407 if (AUTONEG_DISABLE == phydev->autoneg)
408 phy_sanitize_settings(phydev);
410 err = phydev->drv->config_aneg(phydev);
414 if (phydev->state != PHY_HALTED) {
415 if (AUTONEG_ENABLE == phydev->autoneg) {
416 phydev->state = PHY_AN;
417 phydev->link_timeout = PHY_AN_TIMEOUT;
419 phydev->state = PHY_FORCING;
420 phydev->link_timeout = PHY_FORCE_TIMEOUT;
425 mutex_unlock(&phydev->lock);
428 EXPORT_SYMBOL(phy_start_aneg);
431 * phy_start_machine - start PHY state machine tracking
432 * @phydev: the phy_device struct
434 * Description: The PHY infrastructure can run a state machine
435 * which tracks whether the PHY is starting up, negotiating,
436 * etc. This function starts the timer which tracks the state
437 * of the PHY. If you want to maintain your own state machine,
438 * do not call this function.
440 void phy_start_machine(struct phy_device *phydev)
442 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
446 * phy_stop_machine - stop the PHY state machine tracking
447 * @phydev: target phy_device struct
449 * Description: Stops the state machine timer, sets the state to UP
450 * (unless it wasn't up yet). This function must be called BEFORE
453 void phy_stop_machine(struct phy_device *phydev)
455 cancel_delayed_work_sync(&phydev->state_queue);
457 mutex_lock(&phydev->lock);
458 if (phydev->state > PHY_UP)
459 phydev->state = PHY_UP;
460 mutex_unlock(&phydev->lock);
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.
499 disable_irq_nosync(irq);
500 atomic_inc(&phydev->irq_disable);
502 queue_work(system_power_efficient_wq, &phydev->phy_queue);
508 * phy_enable_interrupts - Enable the interrupts from the PHY side
509 * @phydev: target phy_device struct
511 static int phy_enable_interrupts(struct phy_device *phydev)
513 int err = phy_clear_interrupt(phydev);
518 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
522 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
523 * @phydev: target phy_device struct
525 static int phy_disable_interrupts(struct phy_device *phydev)
529 /* Disable PHY interrupts */
530 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
534 /* Clear the interrupt */
535 err = phy_clear_interrupt(phydev);
548 * phy_start_interrupts - request and enable interrupts for a PHY device
549 * @phydev: target phy_device struct
551 * Description: Request the interrupt for the given PHY.
552 * If this fails, then we set irq to PHY_POLL.
553 * Otherwise, we enable the interrupts in the PHY.
554 * This should only be called with a valid IRQ number.
555 * Returns 0 on success or < 0 on error.
557 int phy_start_interrupts(struct phy_device *phydev)
559 atomic_set(&phydev->irq_disable, 0);
560 if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt",
562 pr_warn("%s: Can't get IRQ %d (PHY)\n",
563 phydev->bus->name, phydev->irq);
564 phydev->irq = PHY_POLL;
568 return phy_enable_interrupts(phydev);
570 EXPORT_SYMBOL(phy_start_interrupts);
573 * phy_stop_interrupts - disable interrupts from a PHY device
574 * @phydev: target phy_device struct
576 int phy_stop_interrupts(struct phy_device *phydev)
578 int err = phy_disable_interrupts(phydev);
583 free_irq(phydev->irq, phydev);
585 /* Cannot call flush_scheduled_work() here as desired because
586 * of rtnl_lock(), but we do not really care about what would
587 * be done, except from enable_irq(), so cancel any work
588 * possibly pending and take care of the matter below.
590 cancel_work_sync(&phydev->phy_queue);
591 /* If work indeed has been cancelled, disable_irq() will have
592 * been left unbalanced from phy_interrupt() and enable_irq()
593 * has to be called so that other devices on the line work.
595 while (atomic_dec_return(&phydev->irq_disable) >= 0)
596 enable_irq(phydev->irq);
600 EXPORT_SYMBOL(phy_stop_interrupts);
603 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
604 * @work: work_struct that describes the work to be done
606 void phy_change(struct work_struct *work)
608 struct phy_device *phydev =
609 container_of(work, struct phy_device, phy_queue);
611 if (phydev->drv->did_interrupt &&
612 !phydev->drv->did_interrupt(phydev))
615 if (phy_disable_interrupts(phydev))
618 mutex_lock(&phydev->lock);
619 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
620 phydev->state = PHY_CHANGELINK;
621 mutex_unlock(&phydev->lock);
623 atomic_dec(&phydev->irq_disable);
624 enable_irq(phydev->irq);
626 /* Reenable interrupts */
627 if (PHY_HALTED != phydev->state &&
628 phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
631 /* reschedule state queue work to run as soon as possible */
632 cancel_delayed_work_sync(&phydev->state_queue);
633 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
637 atomic_dec(&phydev->irq_disable);
638 enable_irq(phydev->irq);
642 disable_irq(phydev->irq);
643 atomic_inc(&phydev->irq_disable);
649 * phy_stop - Bring down the PHY link, and stop checking the status
650 * @phydev: target phy_device struct
652 void phy_stop(struct phy_device *phydev)
654 mutex_lock(&phydev->lock);
656 if (PHY_HALTED == phydev->state)
659 if (phy_interrupt_is_valid(phydev)) {
660 /* Disable PHY Interrupts */
661 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
663 /* Clear any pending interrupts */
664 phy_clear_interrupt(phydev);
667 phydev->state = PHY_HALTED;
670 mutex_unlock(&phydev->lock);
672 /* Cannot call flush_scheduled_work() here as desired because
673 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
674 * will not reenable interrupts.
677 EXPORT_SYMBOL(phy_stop);
680 * phy_start - start or restart a PHY device
681 * @phydev: target phy_device struct
683 * Description: Indicates the attached device's readiness to
684 * handle PHY-related work. Used during startup to start the
685 * PHY, and after a call to phy_stop() to resume operation.
686 * Also used to indicate the MDIO bus has cleared an error
689 void phy_start(struct phy_device *phydev)
691 mutex_lock(&phydev->lock);
693 switch (phydev->state) {
695 phydev->state = PHY_PENDING;
698 phydev->state = PHY_UP;
701 phydev->state = PHY_RESUMING;
705 mutex_unlock(&phydev->lock);
707 EXPORT_SYMBOL(phy_start);
710 * phy_state_machine - Handle the state machine
711 * @work: work_struct that describes the work to be done
713 void phy_state_machine(struct work_struct *work)
715 struct delayed_work *dwork = to_delayed_work(work);
716 struct phy_device *phydev =
717 container_of(dwork, struct phy_device, state_queue);
718 bool needs_aneg = false, do_suspend = false, do_resume = false;
721 mutex_lock(&phydev->lock);
723 switch (phydev->state) {
732 phydev->link_timeout = PHY_AN_TIMEOUT;
736 err = phy_read_status(phydev);
740 /* If the link is down, give up on negotiation for now */
742 phydev->state = PHY_NOLINK;
743 netif_carrier_off(phydev->attached_dev);
744 phydev->adjust_link(phydev->attached_dev);
748 /* Check if negotiation is done. Break if there's an error */
749 err = phy_aneg_done(phydev);
753 /* If AN is done, we're running */
755 phydev->state = PHY_RUNNING;
756 netif_carrier_on(phydev->attached_dev);
757 phydev->adjust_link(phydev->attached_dev);
759 } else if (0 == phydev->link_timeout--)
763 err = phy_read_status(phydev);
768 if (AUTONEG_ENABLE == phydev->autoneg) {
769 err = phy_aneg_done(phydev);
774 phydev->state = PHY_AN;
775 phydev->link_timeout = PHY_AN_TIMEOUT;
779 phydev->state = PHY_RUNNING;
780 netif_carrier_on(phydev->attached_dev);
781 phydev->adjust_link(phydev->attached_dev);
785 err = genphy_update_link(phydev);
790 phydev->state = PHY_RUNNING;
791 netif_carrier_on(phydev->attached_dev);
793 if (0 == phydev->link_timeout--)
797 phydev->adjust_link(phydev->attached_dev);
800 /* Only register a CHANGE if we are
801 * polling or ignoring interrupts
803 if (!phy_interrupt_is_valid(phydev))
804 phydev->state = PHY_CHANGELINK;
807 err = phy_read_status(phydev);
812 phydev->state = PHY_RUNNING;
813 netif_carrier_on(phydev->attached_dev);
815 phydev->state = PHY_NOLINK;
816 netif_carrier_off(phydev->attached_dev);
819 phydev->adjust_link(phydev->attached_dev);
821 if (phy_interrupt_is_valid(phydev))
822 err = phy_config_interrupt(phydev,
823 PHY_INTERRUPT_ENABLED);
828 netif_carrier_off(phydev->attached_dev);
829 phydev->adjust_link(phydev->attached_dev);
834 err = phy_clear_interrupt(phydev);
838 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
842 if (AUTONEG_ENABLE == phydev->autoneg) {
843 err = phy_aneg_done(phydev);
847 /* err > 0 if AN is done.
848 * Otherwise, it's 0, and we're still waiting for AN
851 err = phy_read_status(phydev);
856 phydev->state = PHY_RUNNING;
857 netif_carrier_on(phydev->attached_dev);
859 phydev->state = PHY_NOLINK;
861 phydev->adjust_link(phydev->attached_dev);
863 phydev->state = PHY_AN;
864 phydev->link_timeout = PHY_AN_TIMEOUT;
867 err = phy_read_status(phydev);
872 phydev->state = PHY_RUNNING;
873 netif_carrier_on(phydev->attached_dev);
875 phydev->state = PHY_NOLINK;
877 phydev->adjust_link(phydev->attached_dev);
883 mutex_unlock(&phydev->lock);
886 err = phy_start_aneg(phydev);
895 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
896 PHY_STATE_TIME * HZ);
899 void phy_mac_interrupt(struct phy_device *phydev, int new_link)
901 cancel_work_sync(&phydev->phy_queue);
902 phydev->link = new_link;
903 schedule_work(&phydev->phy_queue);
905 EXPORT_SYMBOL(phy_mac_interrupt);
907 static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
910 /* Write the desired MMD Devad */
911 bus->write(bus, addr, MII_MMD_CTRL, devad);
913 /* Write the desired MMD register address */
914 bus->write(bus, addr, MII_MMD_DATA, prtad);
916 /* Select the Function : DATA with no post increment */
917 bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
921 * phy_read_mmd_indirect - reads data from the MMD registers
922 * @bus: the target MII bus
923 * @prtad: MMD Address
925 * @addr: PHY address on the MII bus
927 * Description: it reads data from the MMD registers (clause 22 to access to
928 * clause 45) of the specified phy address.
929 * To read these register we have:
930 * 1) Write reg 13 // DEVAD
931 * 2) Write reg 14 // MMD Address
932 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
933 * 3) Read reg 14 // Read MMD data
935 static int phy_read_mmd_indirect(struct mii_bus *bus, int prtad, int devad,
938 mmd_phy_indirect(bus, prtad, devad, addr);
940 /* Read the content of the MMD's selected register */
941 return bus->read(bus, addr, MII_MMD_DATA);
945 * phy_write_mmd_indirect - writes data to the MMD registers
946 * @bus: the target MII bus
947 * @prtad: MMD Address
949 * @addr: PHY address on the MII bus
950 * @data: data to write in the MMD register
952 * Description: Write data from the MMD registers of the specified
954 * To write these register we have:
955 * 1) Write reg 13 // DEVAD
956 * 2) Write reg 14 // MMD Address
957 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
958 * 3) Write reg 14 // Write MMD data
960 static void phy_write_mmd_indirect(struct mii_bus *bus, int prtad, int devad,
963 mmd_phy_indirect(bus, prtad, devad, addr);
965 /* Write the data into MMD's selected register */
966 bus->write(bus, addr, MII_MMD_DATA, data);
970 * phy_init_eee - init and check the EEE feature
971 * @phydev: target phy_device struct
972 * @clk_stop_enable: PHY may stop the clock during LPI
974 * Description: it checks if the Energy-Efficient Ethernet (EEE)
975 * is supported by looking at the MMD registers 3.20 and 7.60/61
976 * and it programs the MMD register 3.0 setting the "Clock stop enable"
979 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
981 /* According to 802.3az,the EEE is supported only in full duplex-mode.
982 * Also EEE feature is active when core is operating with MII, GMII
985 if ((phydev->duplex == DUPLEX_FULL) &&
986 ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
987 (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
988 (phydev->interface == PHY_INTERFACE_MODE_RGMII))) {
989 int eee_lp, eee_cap, eee_adv;
994 /* Read phy status to properly get the right settings */
995 status = phy_read_status(phydev);
999 /* First check if the EEE ability is supported */
1000 eee_cap = phy_read_mmd_indirect(phydev->bus, MDIO_PCS_EEE_ABLE,
1001 MDIO_MMD_PCS, phydev->addr);
1005 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1007 return -EPROTONOSUPPORT;
1009 /* Check which link settings negotiated and verify it in
1010 * the EEE advertising registers.
1012 eee_lp = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_LPABLE,
1013 MDIO_MMD_AN, phydev->addr);
1017 eee_adv = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV,
1018 MDIO_MMD_AN, phydev->addr);
1022 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1023 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1024 idx = phy_find_setting(phydev->speed, phydev->duplex);
1025 if (!(lp & adv & settings[idx].setting))
1026 return -EPROTONOSUPPORT;
1028 if (clk_stop_enable) {
1029 /* Configure the PHY to stop receiving xMII
1030 * clock while it is signaling LPI.
1032 int val = phy_read_mmd_indirect(phydev->bus, MDIO_CTRL1,
1038 val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1039 phy_write_mmd_indirect(phydev->bus, MDIO_CTRL1,
1040 MDIO_MMD_PCS, phydev->addr, val);
1043 return 0; /* EEE supported */
1046 return -EPROTONOSUPPORT;
1048 EXPORT_SYMBOL(phy_init_eee);
1051 * phy_get_eee_err - report the EEE wake error count
1052 * @phydev: target phy_device struct
1054 * Description: it is to report the number of time where the PHY
1055 * failed to complete its normal wake sequence.
1057 int phy_get_eee_err(struct phy_device *phydev)
1059 return phy_read_mmd_indirect(phydev->bus, MDIO_PCS_EEE_WK_ERR,
1060 MDIO_MMD_PCS, phydev->addr);
1062 EXPORT_SYMBOL(phy_get_eee_err);
1065 * phy_ethtool_get_eee - get EEE supported and status
1066 * @phydev: target phy_device struct
1067 * @data: ethtool_eee data
1069 * Description: it reportes the Supported/Advertisement/LP Advertisement
1072 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1076 /* Get Supported EEE */
1077 val = phy_read_mmd_indirect(phydev->bus, MDIO_PCS_EEE_ABLE,
1078 MDIO_MMD_PCS, phydev->addr);
1081 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1083 /* Get advertisement EEE */
1084 val = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV,
1085 MDIO_MMD_AN, phydev->addr);
1088 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1090 /* Get LP advertisement EEE */
1091 val = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_LPABLE,
1092 MDIO_MMD_AN, phydev->addr);
1095 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1099 EXPORT_SYMBOL(phy_ethtool_get_eee);
1102 * phy_ethtool_set_eee - set EEE supported and status
1103 * @phydev: target phy_device struct
1104 * @data: ethtool_eee data
1106 * Description: it is to program the Advertisement EEE register.
1108 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1110 int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1112 phy_write_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV, MDIO_MMD_AN,
1117 EXPORT_SYMBOL(phy_ethtool_set_eee);
1119 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1121 if (phydev->drv->set_wol)
1122 return phydev->drv->set_wol(phydev, wol);
1126 EXPORT_SYMBOL(phy_ethtool_set_wol);
1128 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1130 if (phydev->drv->get_wol)
1131 phydev->drv->get_wol(phydev, wol);
1133 EXPORT_SYMBOL(phy_ethtool_get_wol);