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1/*
2 * drivers/net/phy/phy.c
3 *
4 * Framework for configuring and reading PHY devices
5 * Based on code in sungem_phy.c and gianfar_phy.c
6 *
7 * Author: Andy Fleming
8 *
9 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 * Copyright (c) 2006, 2007 Maciej W. Rozycki
11 *
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
16 *
17 */
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/init.h>
24#include <linux/delay.h>
25#include <linux/netdevice.h>
26#include <linux/etherdevice.h>
27#include <linux/skbuff.h>
28#include <linux/mm.h>
29#include <linux/module.h>
30#include <linux/mii.h>
31#include <linux/ethtool.h>
32#include <linux/phy.h>
33#include <linux/timer.h>
34#include <linux/workqueue.h>
35
36#include <linux/atomic.h>
37#include <asm/io.h>
38#include <asm/irq.h>
39#include <asm/uaccess.h>
40
41/**
42 * phy_print_status - Convenience function to print out the current phy status
43 * @phydev: the phy_device struct
44 */
45void phy_print_status(struct phy_device *phydev)
46{
47 pr_info("PHY: %s - Link is %s", dev_name(&phydev->dev),
48 phydev->link ? "Up" : "Down");
49 if (phydev->link)
50 printk(KERN_CONT " - %d/%s", phydev->speed,
51 DUPLEX_FULL == phydev->duplex ?
52 "Full" : "Half");
53
54 printk(KERN_CONT "\n");
55}
56EXPORT_SYMBOL(phy_print_status);
57
58
59/**
60 * phy_clear_interrupt - Ack the phy device's interrupt
61 * @phydev: the phy_device struct
62 *
63 * If the @phydev driver has an ack_interrupt function, call it to
64 * ack and clear the phy device's interrupt.
65 *
66 * Returns 0 on success on < 0 on error.
67 */
68static int phy_clear_interrupt(struct phy_device *phydev)
69{
70 int err = 0;
71
72 if (phydev->drv->ack_interrupt)
73 err = phydev->drv->ack_interrupt(phydev);
74
75 return err;
76}
77
78/**
79 * phy_config_interrupt - configure the PHY device for the requested interrupts
80 * @phydev: the phy_device struct
81 * @interrupts: interrupt flags to configure for this @phydev
82 *
83 * Returns 0 on success on < 0 on error.
84 */
85static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
86{
87 int err = 0;
88
89 phydev->interrupts = interrupts;
90 if (phydev->drv->config_intr)
91 err = phydev->drv->config_intr(phydev);
92
93 return err;
94}
95
96
97/**
98 * phy_aneg_done - return auto-negotiation status
99 * @phydev: target phy_device struct
100 *
101 * Description: Reads the status register and returns 0 either if
102 * auto-negotiation is incomplete, or if there was an error.
103 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
104 */
105static inline int phy_aneg_done(struct phy_device *phydev)
106{
107 int retval;
108
109 retval = phy_read(phydev, MII_BMSR);
110
111 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
112}
113
114/* A structure for mapping a particular speed and duplex
115 * combination to a particular SUPPORTED and ADVERTISED value */
116struct phy_setting {
117 int speed;
118 int duplex;
119 u32 setting;
120};
121
122/* A mapping of all SUPPORTED settings to speed/duplex */
123static const struct phy_setting settings[] = {
124 {
125 .speed = 10000,
126 .duplex = DUPLEX_FULL,
127 .setting = SUPPORTED_10000baseT_Full,
128 },
129 {
130 .speed = SPEED_1000,
131 .duplex = DUPLEX_FULL,
132 .setting = SUPPORTED_1000baseT_Full,
133 },
134 {
135 .speed = SPEED_1000,
136 .duplex = DUPLEX_HALF,
137 .setting = SUPPORTED_1000baseT_Half,
138 },
139 {
140 .speed = SPEED_100,
141 .duplex = DUPLEX_FULL,
142 .setting = SUPPORTED_100baseT_Full,
143 },
144 {
145 .speed = SPEED_100,
146 .duplex = DUPLEX_HALF,
147 .setting = SUPPORTED_100baseT_Half,
148 },
149 {
150 .speed = SPEED_10,
151 .duplex = DUPLEX_FULL,
152 .setting = SUPPORTED_10baseT_Full,
153 },
154 {
155 .speed = SPEED_10,
156 .duplex = DUPLEX_HALF,
157 .setting = SUPPORTED_10baseT_Half,
158 },
159};
160
161#define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
162
163/**
164 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
165 * @speed: speed to match
166 * @duplex: duplex to match
167 *
168 * Description: Searches the settings array for the setting which
169 * matches the desired speed and duplex, and returns the index
170 * of that setting. Returns the index of the last setting if
171 * none of the others match.
172 */
173static inline int phy_find_setting(int speed, int duplex)
174{
175 int idx = 0;
176
177 while (idx < ARRAY_SIZE(settings) &&
178 (settings[idx].speed != speed ||
179 settings[idx].duplex != duplex))
180 idx++;
181
182 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
183}
184
185/**
186 * phy_find_valid - find a PHY setting that matches the requested features mask
187 * @idx: The first index in settings[] to search
188 * @features: A mask of the valid settings
189 *
190 * Description: Returns the index of the first valid setting less
191 * than or equal to the one pointed to by idx, as determined by
192 * the mask in features. Returns the index of the last setting
193 * if nothing else matches.
194 */
195static inline int phy_find_valid(int idx, u32 features)
196{
197 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
198 idx++;
199
200 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
201}
202
203/**
204 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
205 * @phydev: the target phy_device struct
206 *
207 * Description: Make sure the PHY is set to supported speeds and
208 * duplexes. Drop down by one in this order: 1000/FULL,
209 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
210 */
211static void phy_sanitize_settings(struct phy_device *phydev)
212{
213 u32 features = phydev->supported;
214 int idx;
215
216 /* Sanitize settings based on PHY capabilities */
217 if ((features & SUPPORTED_Autoneg) == 0)
218 phydev->autoneg = AUTONEG_DISABLE;
219
220 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
221 features);
222
223 phydev->speed = settings[idx].speed;
224 phydev->duplex = settings[idx].duplex;
225}
226
227/**
228 * phy_ethtool_sset - generic ethtool sset function, handles all the details
229 * @phydev: target phy_device struct
230 * @cmd: ethtool_cmd
231 *
232 * A few notes about parameter checking:
233 * - We don't set port or transceiver, so we don't care what they
234 * were set to.
235 * - phy_start_aneg() will make sure forced settings are sane, and
236 * choose the next best ones from the ones selected, so we don't
237 * care if ethtool tries to give us bad values.
238 */
239int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
240{
241 u32 speed = ethtool_cmd_speed(cmd);
242
243 if (cmd->phy_address != phydev->addr)
244 return -EINVAL;
245
246 /* We make sure that we don't pass unsupported
247 * values in to the PHY */
248 cmd->advertising &= phydev->supported;
249
250 /* Verify the settings we care about. */
251 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
252 return -EINVAL;
253
254 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
255 return -EINVAL;
256
257 if (cmd->autoneg == AUTONEG_DISABLE &&
258 ((speed != SPEED_1000 &&
259 speed != SPEED_100 &&
260 speed != SPEED_10) ||
261 (cmd->duplex != DUPLEX_HALF &&
262 cmd->duplex != DUPLEX_FULL)))
263 return -EINVAL;
264
265 phydev->autoneg = cmd->autoneg;
266
267 phydev->speed = speed;
268
269 phydev->advertising = cmd->advertising;
270
271 if (AUTONEG_ENABLE == cmd->autoneg)
272 phydev->advertising |= ADVERTISED_Autoneg;
273 else
274 phydev->advertising &= ~ADVERTISED_Autoneg;
275
276 phydev->duplex = cmd->duplex;
277
278 /* Restart the PHY */
279 phy_start_aneg(phydev);
280
281 return 0;
282}
283EXPORT_SYMBOL(phy_ethtool_sset);
284
285int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
286{
287 cmd->supported = phydev->supported;
288
289 cmd->advertising = phydev->advertising;
290
291 ethtool_cmd_speed_set(cmd, phydev->speed);
292 cmd->duplex = phydev->duplex;
293 cmd->port = PORT_MII;
294 cmd->phy_address = phydev->addr;
295 cmd->transceiver = XCVR_EXTERNAL;
296 cmd->autoneg = phydev->autoneg;
297
298 return 0;
299}
300EXPORT_SYMBOL(phy_ethtool_gset);
301
302/**
303 * phy_mii_ioctl - generic PHY MII ioctl interface
304 * @phydev: the phy_device struct
305 * @ifr: &struct ifreq for socket ioctl's
306 * @cmd: ioctl cmd to execute
307 *
308 * Note that this function is currently incompatible with the
309 * PHYCONTROL layer. It changes registers without regard to
310 * current state. Use at own risk.
311 */
312int phy_mii_ioctl(struct phy_device *phydev,
313 struct ifreq *ifr, int cmd)
314{
315 struct mii_ioctl_data *mii_data = if_mii(ifr);
316 u16 val = mii_data->val_in;
317
318 switch (cmd) {
319 case SIOCGMIIPHY:
320 mii_data->phy_id = phydev->addr;
321 /* fall through */
322
323 case SIOCGMIIREG:
324 mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id,
325 mii_data->reg_num);
326 break;
327
328 case SIOCSMIIREG:
329 if (mii_data->phy_id == phydev->addr) {
330 switch(mii_data->reg_num) {
331 case MII_BMCR:
332 if ((val & (BMCR_RESET|BMCR_ANENABLE)) == 0)
333 phydev->autoneg = AUTONEG_DISABLE;
334 else
335 phydev->autoneg = AUTONEG_ENABLE;
336 if ((!phydev->autoneg) && (val & BMCR_FULLDPLX))
337 phydev->duplex = DUPLEX_FULL;
338 else
339 phydev->duplex = DUPLEX_HALF;
340 if ((!phydev->autoneg) &&
341 (val & BMCR_SPEED1000))
342 phydev->speed = SPEED_1000;
343 else if ((!phydev->autoneg) &&
344 (val & BMCR_SPEED100))
345 phydev->speed = SPEED_100;
346 break;
347 case MII_ADVERTISE:
348 phydev->advertising = val;
349 break;
350 default:
351 /* do nothing */
352 break;
353 }
354 }
355
356 mdiobus_write(phydev->bus, mii_data->phy_id,
357 mii_data->reg_num, val);
358
359 if (mii_data->reg_num == MII_BMCR &&
360 val & BMCR_RESET &&
361 phydev->drv->config_init) {
362 phy_scan_fixups(phydev);
363 phydev->drv->config_init(phydev);
364 }
365 break;
366
367 case SIOCSHWTSTAMP:
368 if (phydev->drv->hwtstamp)
369 return phydev->drv->hwtstamp(phydev, ifr);
370 /* fall through */
371
372 default:
373 return -EOPNOTSUPP;
374 }
375
376 return 0;
377}
378EXPORT_SYMBOL(phy_mii_ioctl);
379
380/**
381 * phy_start_aneg - start auto-negotiation for this PHY device
382 * @phydev: the phy_device struct
383 *
384 * Description: Sanitizes the settings (if we're not autonegotiating
385 * them), and then calls the driver's config_aneg function.
386 * If the PHYCONTROL Layer is operating, we change the state to
387 * reflect the beginning of Auto-negotiation or forcing.
388 */
389int phy_start_aneg(struct phy_device *phydev)
390{
391 int err;
392
393 mutex_lock(&phydev->lock);
394
395 if (AUTONEG_DISABLE == phydev->autoneg)
396 phy_sanitize_settings(phydev);
397
398 err = phydev->drv->config_aneg(phydev);
399
400 if (err < 0)
401 goto out_unlock;
402
403 if (phydev->state != PHY_HALTED) {
404 if (AUTONEG_ENABLE == phydev->autoneg) {
405 phydev->state = PHY_AN;
406 phydev->link_timeout = PHY_AN_TIMEOUT;
407 } else {
408 phydev->state = PHY_FORCING;
409 phydev->link_timeout = PHY_FORCE_TIMEOUT;
410 }
411 }
412
413out_unlock:
414 mutex_unlock(&phydev->lock);
415 return err;
416}
417EXPORT_SYMBOL(phy_start_aneg);
418
419
420static void phy_change(struct work_struct *work);
421
422/**
423 * phy_start_machine - start PHY state machine tracking
424 * @phydev: the phy_device struct
425 * @handler: callback function for state change notifications
426 *
427 * Description: The PHY infrastructure can run a state machine
428 * which tracks whether the PHY is starting up, negotiating,
429 * etc. This function starts the timer which tracks the state
430 * of the PHY. If you want to be notified when the state changes,
431 * pass in the callback @handler, otherwise, pass NULL. If you
432 * want to maintain your own state machine, do not call this
433 * function.
434 */
435void phy_start_machine(struct phy_device *phydev,
436 void (*handler)(struct net_device *))
437{
438 phydev->adjust_state = handler;
439
440 schedule_delayed_work(&phydev->state_queue, HZ);
441}
442
443/**
444 * phy_stop_machine - stop the PHY state machine tracking
445 * @phydev: target phy_device struct
446 *
447 * Description: Stops the state machine timer, sets the state to UP
448 * (unless it wasn't up yet). This function must be called BEFORE
449 * phy_detach.
450 */
451void phy_stop_machine(struct phy_device *phydev)
452{
453 cancel_delayed_work_sync(&phydev->state_queue);
454
455 mutex_lock(&phydev->lock);
456 if (phydev->state > PHY_UP)
457 phydev->state = PHY_UP;
458 mutex_unlock(&phydev->lock);
459
460 phydev->adjust_state = NULL;
461}
462
463/**
464 * phy_force_reduction - reduce PHY speed/duplex settings by one step
465 * @phydev: target phy_device struct
466 *
467 * Description: Reduces the speed/duplex settings by one notch,
468 * in this order--
469 * 1000/FULL, 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
470 * The function bottoms out at 10/HALF.
471 */
472static void phy_force_reduction(struct phy_device *phydev)
473{
474 int idx;
475
476 idx = phy_find_setting(phydev->speed, phydev->duplex);
477
478 idx++;
479
480 idx = phy_find_valid(idx, phydev->supported);
481
482 phydev->speed = settings[idx].speed;
483 phydev->duplex = settings[idx].duplex;
484
485 pr_info("Trying %d/%s\n", phydev->speed,
486 DUPLEX_FULL == phydev->duplex ?
487 "FULL" : "HALF");
488}
489
490
491/**
492 * phy_error - enter HALTED state for this PHY device
493 * @phydev: target phy_device struct
494 *
495 * Moves the PHY to the HALTED state in response to a read
496 * or write error, and tells the controller the link is down.
497 * Must not be called from interrupt context, or while the
498 * phydev->lock is held.
499 */
500static void phy_error(struct phy_device *phydev)
501{
502 mutex_lock(&phydev->lock);
503 phydev->state = PHY_HALTED;
504 mutex_unlock(&phydev->lock);
505}
506
507/**
508 * phy_interrupt - PHY interrupt handler
509 * @irq: interrupt line
510 * @phy_dat: phy_device pointer
511 *
512 * Description: When a PHY interrupt occurs, the handler disables
513 * interrupts, and schedules a work task to clear the interrupt.
514 */
515static irqreturn_t phy_interrupt(int irq, void *phy_dat)
516{
517 struct phy_device *phydev = phy_dat;
518
519 if (PHY_HALTED == phydev->state)
520 return IRQ_NONE; /* It can't be ours. */
521
522 /* The MDIO bus is not allowed to be written in interrupt
523 * context, so we need to disable the irq here. A work
524 * queue will write the PHY to disable and clear the
525 * interrupt, and then reenable the irq line. */
526 disable_irq_nosync(irq);
527 atomic_inc(&phydev->irq_disable);
528
529 schedule_work(&phydev->phy_queue);
530
531 return IRQ_HANDLED;
532}
533
534/**
535 * phy_enable_interrupts - Enable the interrupts from the PHY side
536 * @phydev: target phy_device struct
537 */
538static int phy_enable_interrupts(struct phy_device *phydev)
539{
540 int err;
541
542 err = phy_clear_interrupt(phydev);
543
544 if (err < 0)
545 return err;
546
547 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
548
549 return err;
550}
551
552/**
553 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
554 * @phydev: target phy_device struct
555 */
556static int phy_disable_interrupts(struct phy_device *phydev)
557{
558 int err;
559
560 /* Disable PHY interrupts */
561 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
562
563 if (err)
564 goto phy_err;
565
566 /* Clear the interrupt */
567 err = phy_clear_interrupt(phydev);
568
569 if (err)
570 goto phy_err;
571
572 return 0;
573
574phy_err:
575 phy_error(phydev);
576
577 return err;
578}
579
580/**
581 * phy_start_interrupts - request and enable interrupts for a PHY device
582 * @phydev: target phy_device struct
583 *
584 * Description: Request the interrupt for the given PHY.
585 * If this fails, then we set irq to PHY_POLL.
586 * Otherwise, we enable the interrupts in the PHY.
587 * This should only be called with a valid IRQ number.
588 * Returns 0 on success or < 0 on error.
589 */
590int phy_start_interrupts(struct phy_device *phydev)
591{
592 int err = 0;
593
594 INIT_WORK(&phydev->phy_queue, phy_change);
595
596 atomic_set(&phydev->irq_disable, 0);
597 if (request_irq(phydev->irq, phy_interrupt,
598 IRQF_SHARED,
599 "phy_interrupt",
600 phydev) < 0) {
601 printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n",
602 phydev->bus->name,
603 phydev->irq);
604 phydev->irq = PHY_POLL;
605 return 0;
606 }
607
608 err = phy_enable_interrupts(phydev);
609
610 return err;
611}
612EXPORT_SYMBOL(phy_start_interrupts);
613
614/**
615 * phy_stop_interrupts - disable interrupts from a PHY device
616 * @phydev: target phy_device struct
617 */
618int phy_stop_interrupts(struct phy_device *phydev)
619{
620 int err;
621
622 err = phy_disable_interrupts(phydev);
623
624 if (err)
625 phy_error(phydev);
626
627 free_irq(phydev->irq, phydev);
628
629 /*
630 * Cannot call flush_scheduled_work() here as desired because
631 * of rtnl_lock(), but we do not really care about what would
632 * be done, except from enable_irq(), so cancel any work
633 * possibly pending and take care of the matter below.
634 */
635 cancel_work_sync(&phydev->phy_queue);
636 /*
637 * If work indeed has been cancelled, disable_irq() will have
638 * been left unbalanced from phy_interrupt() and enable_irq()
639 * has to be called so that other devices on the line work.
640 */
641 while (atomic_dec_return(&phydev->irq_disable) >= 0)
642 enable_irq(phydev->irq);
643
644 return err;
645}
646EXPORT_SYMBOL(phy_stop_interrupts);
647
648
649/**
650 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
651 * @work: work_struct that describes the work to be done
652 */
653static void phy_change(struct work_struct *work)
654{
655 int err;
656 struct phy_device *phydev =
657 container_of(work, struct phy_device, phy_queue);
658
659 if (phydev->drv->did_interrupt &&
660 !phydev->drv->did_interrupt(phydev))
661 goto ignore;
662
663 err = phy_disable_interrupts(phydev);
664
665 if (err)
666 goto phy_err;
667
668 mutex_lock(&phydev->lock);
669 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
670 phydev->state = PHY_CHANGELINK;
671 mutex_unlock(&phydev->lock);
672
673 atomic_dec(&phydev->irq_disable);
674 enable_irq(phydev->irq);
675
676 /* Reenable interrupts */
677 if (PHY_HALTED != phydev->state)
678 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
679
680 if (err)
681 goto irq_enable_err;
682
683 /* reschedule state queue work to run as soon as possible */
684 cancel_delayed_work_sync(&phydev->state_queue);
685 schedule_delayed_work(&phydev->state_queue, 0);
686
687 return;
688
689ignore:
690 atomic_dec(&phydev->irq_disable);
691 enable_irq(phydev->irq);
692 return;
693
694irq_enable_err:
695 disable_irq(phydev->irq);
696 atomic_inc(&phydev->irq_disable);
697phy_err:
698 phy_error(phydev);
699}
700
701/**
702 * phy_stop - Bring down the PHY link, and stop checking the status
703 * @phydev: target phy_device struct
704 */
705void phy_stop(struct phy_device *phydev)
706{
707 mutex_lock(&phydev->lock);
708
709 if (PHY_HALTED == phydev->state)
710 goto out_unlock;
711
712 if (phydev->irq != PHY_POLL) {
713 /* Disable PHY Interrupts */
714 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
715
716 /* Clear any pending interrupts */
717 phy_clear_interrupt(phydev);
718 }
719
720 phydev->state = PHY_HALTED;
721
722out_unlock:
723 mutex_unlock(&phydev->lock);
724
725 /*
726 * Cannot call flush_scheduled_work() here as desired because
727 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
728 * will not reenable interrupts.
729 */
730}
731
732
733/**
734 * phy_start - start or restart a PHY device
735 * @phydev: target phy_device struct
736 *
737 * Description: Indicates the attached device's readiness to
738 * handle PHY-related work. Used during startup to start the
739 * PHY, and after a call to phy_stop() to resume operation.
740 * Also used to indicate the MDIO bus has cleared an error
741 * condition.
742 */
743void phy_start(struct phy_device *phydev)
744{
745 mutex_lock(&phydev->lock);
746
747 switch (phydev->state) {
748 case PHY_STARTING:
749 phydev->state = PHY_PENDING;
750 break;
751 case PHY_READY:
752 phydev->state = PHY_UP;
753 break;
754 case PHY_HALTED:
755 phydev->state = PHY_RESUMING;
756 default:
757 break;
758 }
759 mutex_unlock(&phydev->lock);
760}
761EXPORT_SYMBOL(phy_stop);
762EXPORT_SYMBOL(phy_start);
763
764/**
765 * phy_state_machine - Handle the state machine
766 * @work: work_struct that describes the work to be done
767 */
768void phy_state_machine(struct work_struct *work)
769{
770 struct delayed_work *dwork = to_delayed_work(work);
771 struct phy_device *phydev =
772 container_of(dwork, struct phy_device, state_queue);
773 int needs_aneg = 0;
774 int err = 0;
775
776 mutex_lock(&phydev->lock);
777
778 if (phydev->adjust_state)
779 phydev->adjust_state(phydev->attached_dev);
780
781 switch(phydev->state) {
782 case PHY_DOWN:
783 case PHY_STARTING:
784 case PHY_READY:
785 case PHY_PENDING:
786 break;
787 case PHY_UP:
788 needs_aneg = 1;
789
790 phydev->link_timeout = PHY_AN_TIMEOUT;
791
792 break;
793 case PHY_AN:
794 err = phy_read_status(phydev);
795
796 if (err < 0)
797 break;
798
799 /* If the link is down, give up on
800 * negotiation for now */
801 if (!phydev->link) {
802 phydev->state = PHY_NOLINK;
803 netif_carrier_off(phydev->attached_dev);
804 phydev->adjust_link(phydev->attached_dev);
805 break;
806 }
807
808 /* Check if negotiation is done. Break
809 * if there's an error */
810 err = phy_aneg_done(phydev);
811 if (err < 0)
812 break;
813
814 /* If AN is done, we're running */
815 if (err > 0) {
816 phydev->state = PHY_RUNNING;
817 netif_carrier_on(phydev->attached_dev);
818 phydev->adjust_link(phydev->attached_dev);
819
820 } else if (0 == phydev->link_timeout--) {
821 int idx;
822
823 needs_aneg = 1;
824 /* If we have the magic_aneg bit,
825 * we try again */
826 if (phydev->drv->flags & PHY_HAS_MAGICANEG)
827 break;
828
829 /* The timer expired, and we still
830 * don't have a setting, so we try
831 * forcing it until we find one that
832 * works, starting from the fastest speed,
833 * and working our way down */
834 idx = phy_find_valid(0, phydev->supported);
835
836 phydev->speed = settings[idx].speed;
837 phydev->duplex = settings[idx].duplex;
838
839 phydev->autoneg = AUTONEG_DISABLE;
840
841 pr_info("Trying %d/%s\n", phydev->speed,
842 DUPLEX_FULL ==
843 phydev->duplex ?
844 "FULL" : "HALF");
845 }
846 break;
847 case PHY_NOLINK:
848 err = phy_read_status(phydev);
849
850 if (err)
851 break;
852
853 if (phydev->link) {
854 phydev->state = PHY_RUNNING;
855 netif_carrier_on(phydev->attached_dev);
856 phydev->adjust_link(phydev->attached_dev);
857 }
858 break;
859 case PHY_FORCING:
860 err = genphy_update_link(phydev);
861
862 if (err)
863 break;
864
865 if (phydev->link) {
866 phydev->state = PHY_RUNNING;
867 netif_carrier_on(phydev->attached_dev);
868 } else {
869 if (0 == phydev->link_timeout--) {
870 phy_force_reduction(phydev);
871 needs_aneg = 1;
872 }
873 }
874
875 phydev->adjust_link(phydev->attached_dev);
876 break;
877 case PHY_RUNNING:
878 /* Only register a CHANGE if we are
879 * polling */
880 if (PHY_POLL == phydev->irq)
881 phydev->state = PHY_CHANGELINK;
882 break;
883 case PHY_CHANGELINK:
884 err = phy_read_status(phydev);
885
886 if (err)
887 break;
888
889 if (phydev->link) {
890 phydev->state = PHY_RUNNING;
891 netif_carrier_on(phydev->attached_dev);
892 } else {
893 phydev->state = PHY_NOLINK;
894 netif_carrier_off(phydev->attached_dev);
895 }
896
897 phydev->adjust_link(phydev->attached_dev);
898
899 if (PHY_POLL != phydev->irq)
900 err = phy_config_interrupt(phydev,
901 PHY_INTERRUPT_ENABLED);
902 break;
903 case PHY_HALTED:
904 if (phydev->link) {
905 phydev->link = 0;
906 netif_carrier_off(phydev->attached_dev);
907 phydev->adjust_link(phydev->attached_dev);
908 }
909 break;
910 case PHY_RESUMING:
911
912 err = phy_clear_interrupt(phydev);
913
914 if (err)
915 break;
916
917 err = phy_config_interrupt(phydev,
918 PHY_INTERRUPT_ENABLED);
919
920 if (err)
921 break;
922
923 if (AUTONEG_ENABLE == phydev->autoneg) {
924 err = phy_aneg_done(phydev);
925 if (err < 0)
926 break;
927
928 /* err > 0 if AN is done.
929 * Otherwise, it's 0, and we're
930 * still waiting for AN */
931 if (err > 0) {
932 err = phy_read_status(phydev);
933 if (err)
934 break;
935
936 if (phydev->link) {
937 phydev->state = PHY_RUNNING;
938 netif_carrier_on(phydev->attached_dev);
939 } else
940 phydev->state = PHY_NOLINK;
941 phydev->adjust_link(phydev->attached_dev);
942 } else {
943 phydev->state = PHY_AN;
944 phydev->link_timeout = PHY_AN_TIMEOUT;
945 }
946 } else {
947 err = phy_read_status(phydev);
948 if (err)
949 break;
950
951 if (phydev->link) {
952 phydev->state = PHY_RUNNING;
953 netif_carrier_on(phydev->attached_dev);
954 } else
955 phydev->state = PHY_NOLINK;
956 phydev->adjust_link(phydev->attached_dev);
957 }
958 break;
959 }
960
961 mutex_unlock(&phydev->lock);
962
963 if (needs_aneg)
964 err = phy_start_aneg(phydev);
965
966 if (err < 0)
967 phy_error(phydev);
968
969 schedule_delayed_work(&phydev->state_queue, PHY_STATE_TIME * HZ);
970}
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
4 *
5 * Author: Andy Fleming
6 *
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * Copyright (c) 2006, 2007 Maciej W. Rozycki
9 */
10
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/netlink.h>
19#include <linux/etherdevice.h>
20#include <linux/skbuff.h>
21#include <linux/mm.h>
22#include <linux/module.h>
23#include <linux/mii.h>
24#include <linux/ethtool.h>
25#include <linux/ethtool_netlink.h>
26#include <linux/phy.h>
27#include <linux/phy_led_triggers.h>
28#include <linux/sfp.h>
29#include <linux/workqueue.h>
30#include <linux/mdio.h>
31#include <linux/io.h>
32#include <linux/uaccess.h>
33#include <linux/atomic.h>
34#include <net/netlink.h>
35#include <net/genetlink.h>
36#include <net/sock.h>
37
38#define PHY_STATE_TIME HZ
39
40#define PHY_STATE_STR(_state) \
41 case PHY_##_state: \
42 return __stringify(_state); \
43
44static const char *phy_state_to_str(enum phy_state st)
45{
46 switch (st) {
47 PHY_STATE_STR(DOWN)
48 PHY_STATE_STR(READY)
49 PHY_STATE_STR(UP)
50 PHY_STATE_STR(RUNNING)
51 PHY_STATE_STR(NOLINK)
52 PHY_STATE_STR(CABLETEST)
53 PHY_STATE_STR(HALTED)
54 }
55
56 return NULL;
57}
58
59static void phy_link_up(struct phy_device *phydev)
60{
61 phydev->phy_link_change(phydev, true);
62 phy_led_trigger_change_speed(phydev);
63}
64
65static void phy_link_down(struct phy_device *phydev)
66{
67 phydev->phy_link_change(phydev, false);
68 phy_led_trigger_change_speed(phydev);
69}
70
71static const char *phy_pause_str(struct phy_device *phydev)
72{
73 bool local_pause, local_asym_pause;
74
75 if (phydev->autoneg == AUTONEG_DISABLE)
76 goto no_pause;
77
78 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
79 phydev->advertising);
80 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
81 phydev->advertising);
82
83 if (local_pause && phydev->pause)
84 return "rx/tx";
85
86 if (local_asym_pause && phydev->asym_pause) {
87 if (local_pause)
88 return "rx";
89 if (phydev->pause)
90 return "tx";
91 }
92
93no_pause:
94 return "off";
95}
96
97/**
98 * phy_print_status - Convenience function to print out the current phy status
99 * @phydev: the phy_device struct
100 */
101void phy_print_status(struct phy_device *phydev)
102{
103 if (phydev->link) {
104 netdev_info(phydev->attached_dev,
105 "Link is Up - %s/%s %s- flow control %s\n",
106 phy_speed_to_str(phydev->speed),
107 phy_duplex_to_str(phydev->duplex),
108 phydev->downshifted_rate ? "(downshifted) " : "",
109 phy_pause_str(phydev));
110 } else {
111 netdev_info(phydev->attached_dev, "Link is Down\n");
112 }
113}
114EXPORT_SYMBOL(phy_print_status);
115
116/**
117 * phy_clear_interrupt - Ack the phy device's interrupt
118 * @phydev: the phy_device struct
119 *
120 * If the @phydev driver has an ack_interrupt function, call it to
121 * ack and clear the phy device's interrupt.
122 *
123 * Returns 0 on success or < 0 on error.
124 */
125static int phy_clear_interrupt(struct phy_device *phydev)
126{
127 if (phydev->drv->ack_interrupt)
128 return phydev->drv->ack_interrupt(phydev);
129
130 return 0;
131}
132
133/**
134 * phy_config_interrupt - configure the PHY device for the requested interrupts
135 * @phydev: the phy_device struct
136 * @interrupts: interrupt flags to configure for this @phydev
137 *
138 * Returns 0 on success or < 0 on error.
139 */
140static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
141{
142 phydev->interrupts = interrupts ? 1 : 0;
143 if (phydev->drv->config_intr)
144 return phydev->drv->config_intr(phydev);
145
146 return 0;
147}
148
149/**
150 * phy_restart_aneg - restart auto-negotiation
151 * @phydev: target phy_device struct
152 *
153 * Restart the autonegotiation on @phydev. Returns >= 0 on success or
154 * negative errno on error.
155 */
156int phy_restart_aneg(struct phy_device *phydev)
157{
158 int ret;
159
160 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
161 ret = genphy_c45_restart_aneg(phydev);
162 else
163 ret = genphy_restart_aneg(phydev);
164
165 return ret;
166}
167EXPORT_SYMBOL_GPL(phy_restart_aneg);
168
169/**
170 * phy_aneg_done - return auto-negotiation status
171 * @phydev: target phy_device struct
172 *
173 * Description: Return the auto-negotiation status from this @phydev
174 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
175 * is still pending.
176 */
177int phy_aneg_done(struct phy_device *phydev)
178{
179 if (phydev->drv && phydev->drv->aneg_done)
180 return phydev->drv->aneg_done(phydev);
181 else if (phydev->is_c45)
182 return genphy_c45_aneg_done(phydev);
183 else
184 return genphy_aneg_done(phydev);
185}
186EXPORT_SYMBOL(phy_aneg_done);
187
188/**
189 * phy_find_valid - find a PHY setting that matches the requested parameters
190 * @speed: desired speed
191 * @duplex: desired duplex
192 * @supported: mask of supported link modes
193 *
194 * Locate a supported phy setting that is, in priority order:
195 * - an exact match for the specified speed and duplex mode
196 * - a match for the specified speed, or slower speed
197 * - the slowest supported speed
198 * Returns the matched phy_setting entry, or %NULL if no supported phy
199 * settings were found.
200 */
201static const struct phy_setting *
202phy_find_valid(int speed, int duplex, unsigned long *supported)
203{
204 return phy_lookup_setting(speed, duplex, supported, false);
205}
206
207/**
208 * phy_supported_speeds - return all speeds currently supported by a phy device
209 * @phy: The phy device to return supported speeds of.
210 * @speeds: buffer to store supported speeds in.
211 * @size: size of speeds buffer.
212 *
213 * Description: Returns the number of supported speeds, and fills the speeds
214 * buffer with the supported speeds. If speeds buffer is too small to contain
215 * all currently supported speeds, will return as many speeds as can fit.
216 */
217unsigned int phy_supported_speeds(struct phy_device *phy,
218 unsigned int *speeds,
219 unsigned int size)
220{
221 return phy_speeds(speeds, size, phy->supported);
222}
223
224/**
225 * phy_check_valid - check if there is a valid PHY setting which matches
226 * speed, duplex, and feature mask
227 * @speed: speed to match
228 * @duplex: duplex to match
229 * @features: A mask of the valid settings
230 *
231 * Description: Returns true if there is a valid setting, false otherwise.
232 */
233static inline bool phy_check_valid(int speed, int duplex,
234 unsigned long *features)
235{
236 return !!phy_lookup_setting(speed, duplex, features, true);
237}
238
239/**
240 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
241 * @phydev: the target phy_device struct
242 *
243 * Description: Make sure the PHY is set to supported speeds and
244 * duplexes. Drop down by one in this order: 1000/FULL,
245 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
246 */
247static void phy_sanitize_settings(struct phy_device *phydev)
248{
249 const struct phy_setting *setting;
250
251 setting = phy_find_valid(phydev->speed, phydev->duplex,
252 phydev->supported);
253 if (setting) {
254 phydev->speed = setting->speed;
255 phydev->duplex = setting->duplex;
256 } else {
257 /* We failed to find anything (no supported speeds?) */
258 phydev->speed = SPEED_UNKNOWN;
259 phydev->duplex = DUPLEX_UNKNOWN;
260 }
261}
262
263int phy_ethtool_ksettings_set(struct phy_device *phydev,
264 const struct ethtool_link_ksettings *cmd)
265{
266 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
267 u8 autoneg = cmd->base.autoneg;
268 u8 duplex = cmd->base.duplex;
269 u32 speed = cmd->base.speed;
270
271 if (cmd->base.phy_address != phydev->mdio.addr)
272 return -EINVAL;
273
274 linkmode_copy(advertising, cmd->link_modes.advertising);
275
276 /* We make sure that we don't pass unsupported values in to the PHY */
277 linkmode_and(advertising, advertising, phydev->supported);
278
279 /* Verify the settings we care about. */
280 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
281 return -EINVAL;
282
283 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
284 return -EINVAL;
285
286 if (autoneg == AUTONEG_DISABLE &&
287 ((speed != SPEED_1000 &&
288 speed != SPEED_100 &&
289 speed != SPEED_10) ||
290 (duplex != DUPLEX_HALF &&
291 duplex != DUPLEX_FULL)))
292 return -EINVAL;
293
294 phydev->autoneg = autoneg;
295
296 phydev->speed = speed;
297
298 linkmode_copy(phydev->advertising, advertising);
299
300 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
301 phydev->advertising, autoneg == AUTONEG_ENABLE);
302
303 phydev->duplex = duplex;
304 phydev->master_slave_set = cmd->base.master_slave_cfg;
305 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
306
307 /* Restart the PHY */
308 phy_start_aneg(phydev);
309
310 return 0;
311}
312EXPORT_SYMBOL(phy_ethtool_ksettings_set);
313
314void phy_ethtool_ksettings_get(struct phy_device *phydev,
315 struct ethtool_link_ksettings *cmd)
316{
317 linkmode_copy(cmd->link_modes.supported, phydev->supported);
318 linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
319 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
320
321 cmd->base.speed = phydev->speed;
322 cmd->base.duplex = phydev->duplex;
323 cmd->base.master_slave_cfg = phydev->master_slave_get;
324 cmd->base.master_slave_state = phydev->master_slave_state;
325 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
326 cmd->base.port = PORT_BNC;
327 else
328 cmd->base.port = PORT_MII;
329 cmd->base.transceiver = phy_is_internal(phydev) ?
330 XCVR_INTERNAL : XCVR_EXTERNAL;
331 cmd->base.phy_address = phydev->mdio.addr;
332 cmd->base.autoneg = phydev->autoneg;
333 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
334 cmd->base.eth_tp_mdix = phydev->mdix;
335}
336EXPORT_SYMBOL(phy_ethtool_ksettings_get);
337
338/**
339 * phy_mii_ioctl - generic PHY MII ioctl interface
340 * @phydev: the phy_device struct
341 * @ifr: &struct ifreq for socket ioctl's
342 * @cmd: ioctl cmd to execute
343 *
344 * Note that this function is currently incompatible with the
345 * PHYCONTROL layer. It changes registers without regard to
346 * current state. Use at own risk.
347 */
348int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
349{
350 struct mii_ioctl_data *mii_data = if_mii(ifr);
351 u16 val = mii_data->val_in;
352 bool change_autoneg = false;
353 int prtad, devad;
354
355 switch (cmd) {
356 case SIOCGMIIPHY:
357 mii_data->phy_id = phydev->mdio.addr;
358 fallthrough;
359
360 case SIOCGMIIREG:
361 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
362 prtad = mdio_phy_id_prtad(mii_data->phy_id);
363 devad = mdio_phy_id_devad(mii_data->phy_id);
364 devad = mdiobus_c45_addr(devad, mii_data->reg_num);
365 } else {
366 prtad = mii_data->phy_id;
367 devad = mii_data->reg_num;
368 }
369 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
370 devad);
371 return 0;
372
373 case SIOCSMIIREG:
374 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
375 prtad = mdio_phy_id_prtad(mii_data->phy_id);
376 devad = mdio_phy_id_devad(mii_data->phy_id);
377 devad = mdiobus_c45_addr(devad, mii_data->reg_num);
378 } else {
379 prtad = mii_data->phy_id;
380 devad = mii_data->reg_num;
381 }
382 if (prtad == phydev->mdio.addr) {
383 switch (devad) {
384 case MII_BMCR:
385 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
386 if (phydev->autoneg == AUTONEG_ENABLE)
387 change_autoneg = true;
388 phydev->autoneg = AUTONEG_DISABLE;
389 if (val & BMCR_FULLDPLX)
390 phydev->duplex = DUPLEX_FULL;
391 else
392 phydev->duplex = DUPLEX_HALF;
393 if (val & BMCR_SPEED1000)
394 phydev->speed = SPEED_1000;
395 else if (val & BMCR_SPEED100)
396 phydev->speed = SPEED_100;
397 else phydev->speed = SPEED_10;
398 }
399 else {
400 if (phydev->autoneg == AUTONEG_DISABLE)
401 change_autoneg = true;
402 phydev->autoneg = AUTONEG_ENABLE;
403 }
404 break;
405 case MII_ADVERTISE:
406 mii_adv_mod_linkmode_adv_t(phydev->advertising,
407 val);
408 change_autoneg = true;
409 break;
410 case MII_CTRL1000:
411 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
412 val);
413 change_autoneg = true;
414 break;
415 default:
416 /* do nothing */
417 break;
418 }
419 }
420
421 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
422
423 if (prtad == phydev->mdio.addr &&
424 devad == MII_BMCR &&
425 val & BMCR_RESET)
426 return phy_init_hw(phydev);
427
428 if (change_autoneg)
429 return phy_start_aneg(phydev);
430
431 return 0;
432
433 case SIOCSHWTSTAMP:
434 if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
435 return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
436 fallthrough;
437
438 default:
439 return -EOPNOTSUPP;
440 }
441}
442EXPORT_SYMBOL(phy_mii_ioctl);
443
444/**
445 * phy_do_ioctl - generic ndo_do_ioctl implementation
446 * @dev: the net_device struct
447 * @ifr: &struct ifreq for socket ioctl's
448 * @cmd: ioctl cmd to execute
449 */
450int phy_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
451{
452 if (!dev->phydev)
453 return -ENODEV;
454
455 return phy_mii_ioctl(dev->phydev, ifr, cmd);
456}
457EXPORT_SYMBOL(phy_do_ioctl);
458
459/* same as phy_do_ioctl, but ensures that net_device is running */
460int phy_do_ioctl_running(struct net_device *dev, struct ifreq *ifr, int cmd)
461{
462 if (!netif_running(dev))
463 return -ENODEV;
464
465 return phy_do_ioctl(dev, ifr, cmd);
466}
467EXPORT_SYMBOL(phy_do_ioctl_running);
468
469void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
470{
471 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
472 jiffies);
473}
474EXPORT_SYMBOL(phy_queue_state_machine);
475
476static void phy_trigger_machine(struct phy_device *phydev)
477{
478 phy_queue_state_machine(phydev, 0);
479}
480
481static void phy_abort_cable_test(struct phy_device *phydev)
482{
483 int err;
484
485 ethnl_cable_test_finished(phydev);
486
487 err = phy_init_hw(phydev);
488 if (err)
489 phydev_err(phydev, "Error while aborting cable test");
490}
491
492int phy_ethtool_get_strings(struct phy_device *phydev, u8 *data)
493{
494 if (!phydev->drv)
495 return -EIO;
496
497 mutex_lock(&phydev->lock);
498 phydev->drv->get_strings(phydev, data);
499 mutex_unlock(&phydev->lock);
500
501 return 0;
502}
503EXPORT_SYMBOL(phy_ethtool_get_strings);
504
505int phy_ethtool_get_sset_count(struct phy_device *phydev)
506{
507 int ret;
508
509 if (!phydev->drv)
510 return -EIO;
511
512 if (phydev->drv->get_sset_count &&
513 phydev->drv->get_strings &&
514 phydev->drv->get_stats) {
515 mutex_lock(&phydev->lock);
516 ret = phydev->drv->get_sset_count(phydev);
517 mutex_unlock(&phydev->lock);
518
519 return ret;
520 }
521
522 return -EOPNOTSUPP;
523}
524EXPORT_SYMBOL(phy_ethtool_get_sset_count);
525
526int phy_ethtool_get_stats(struct phy_device *phydev,
527 struct ethtool_stats *stats, u64 *data)
528{
529 if (!phydev->drv)
530 return -EIO;
531
532 mutex_lock(&phydev->lock);
533 phydev->drv->get_stats(phydev, stats, data);
534 mutex_unlock(&phydev->lock);
535
536 return 0;
537}
538EXPORT_SYMBOL(phy_ethtool_get_stats);
539
540int phy_start_cable_test(struct phy_device *phydev,
541 struct netlink_ext_ack *extack)
542{
543 struct net_device *dev = phydev->attached_dev;
544 int err = -ENOMEM;
545
546 if (!(phydev->drv &&
547 phydev->drv->cable_test_start &&
548 phydev->drv->cable_test_get_status)) {
549 NL_SET_ERR_MSG(extack,
550 "PHY driver does not support cable testing");
551 return -EOPNOTSUPP;
552 }
553
554 mutex_lock(&phydev->lock);
555 if (phydev->state == PHY_CABLETEST) {
556 NL_SET_ERR_MSG(extack,
557 "PHY already performing a test");
558 err = -EBUSY;
559 goto out;
560 }
561
562 if (phydev->state < PHY_UP ||
563 phydev->state > PHY_CABLETEST) {
564 NL_SET_ERR_MSG(extack,
565 "PHY not configured. Try setting interface up");
566 err = -EBUSY;
567 goto out;
568 }
569
570 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
571 if (err)
572 goto out;
573
574 /* Mark the carrier down until the test is complete */
575 phy_link_down(phydev);
576
577 netif_testing_on(dev);
578 err = phydev->drv->cable_test_start(phydev);
579 if (err) {
580 netif_testing_off(dev);
581 phy_link_up(phydev);
582 goto out_free;
583 }
584
585 phydev->state = PHY_CABLETEST;
586
587 if (phy_polling_mode(phydev))
588 phy_trigger_machine(phydev);
589
590 mutex_unlock(&phydev->lock);
591
592 return 0;
593
594out_free:
595 ethnl_cable_test_free(phydev);
596out:
597 mutex_unlock(&phydev->lock);
598
599 return err;
600}
601EXPORT_SYMBOL(phy_start_cable_test);
602
603int phy_start_cable_test_tdr(struct phy_device *phydev,
604 struct netlink_ext_ack *extack,
605 const struct phy_tdr_config *config)
606{
607 struct net_device *dev = phydev->attached_dev;
608 int err = -ENOMEM;
609
610 if (!(phydev->drv &&
611 phydev->drv->cable_test_tdr_start &&
612 phydev->drv->cable_test_get_status)) {
613 NL_SET_ERR_MSG(extack,
614 "PHY driver does not support cable test TDR");
615 return -EOPNOTSUPP;
616 }
617
618 mutex_lock(&phydev->lock);
619 if (phydev->state == PHY_CABLETEST) {
620 NL_SET_ERR_MSG(extack,
621 "PHY already performing a test");
622 err = -EBUSY;
623 goto out;
624 }
625
626 if (phydev->state < PHY_UP ||
627 phydev->state > PHY_CABLETEST) {
628 NL_SET_ERR_MSG(extack,
629 "PHY not configured. Try setting interface up");
630 err = -EBUSY;
631 goto out;
632 }
633
634 err = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_TDR_NTF);
635 if (err)
636 goto out;
637
638 /* Mark the carrier down until the test is complete */
639 phy_link_down(phydev);
640
641 netif_testing_on(dev);
642 err = phydev->drv->cable_test_tdr_start(phydev, config);
643 if (err) {
644 netif_testing_off(dev);
645 phy_link_up(phydev);
646 goto out_free;
647 }
648
649 phydev->state = PHY_CABLETEST;
650
651 if (phy_polling_mode(phydev))
652 phy_trigger_machine(phydev);
653
654 mutex_unlock(&phydev->lock);
655
656 return 0;
657
658out_free:
659 ethnl_cable_test_free(phydev);
660out:
661 mutex_unlock(&phydev->lock);
662
663 return err;
664}
665EXPORT_SYMBOL(phy_start_cable_test_tdr);
666
667static int phy_config_aneg(struct phy_device *phydev)
668{
669 if (phydev->drv->config_aneg)
670 return phydev->drv->config_aneg(phydev);
671
672 /* Clause 45 PHYs that don't implement Clause 22 registers are not
673 * allowed to call genphy_config_aneg()
674 */
675 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
676 return genphy_c45_config_aneg(phydev);
677
678 return genphy_config_aneg(phydev);
679}
680
681/**
682 * phy_check_link_status - check link status and set state accordingly
683 * @phydev: the phy_device struct
684 *
685 * Description: Check for link and whether autoneg was triggered / is running
686 * and set state accordingly
687 */
688static int phy_check_link_status(struct phy_device *phydev)
689{
690 int err;
691
692 WARN_ON(!mutex_is_locked(&phydev->lock));
693
694 /* Keep previous state if loopback is enabled because some PHYs
695 * report that Link is Down when loopback is enabled.
696 */
697 if (phydev->loopback_enabled)
698 return 0;
699
700 err = phy_read_status(phydev);
701 if (err)
702 return err;
703
704 if (phydev->link && phydev->state != PHY_RUNNING) {
705 phy_check_downshift(phydev);
706 phydev->state = PHY_RUNNING;
707 phy_link_up(phydev);
708 } else if (!phydev->link && phydev->state != PHY_NOLINK) {
709 phydev->state = PHY_NOLINK;
710 phy_link_down(phydev);
711 }
712
713 return 0;
714}
715
716/**
717 * phy_start_aneg - start auto-negotiation for this PHY device
718 * @phydev: the phy_device struct
719 *
720 * Description: Sanitizes the settings (if we're not autonegotiating
721 * them), and then calls the driver's config_aneg function.
722 * If the PHYCONTROL Layer is operating, we change the state to
723 * reflect the beginning of Auto-negotiation or forcing.
724 */
725int phy_start_aneg(struct phy_device *phydev)
726{
727 int err;
728
729 if (!phydev->drv)
730 return -EIO;
731
732 mutex_lock(&phydev->lock);
733
734 if (AUTONEG_DISABLE == phydev->autoneg)
735 phy_sanitize_settings(phydev);
736
737 err = phy_config_aneg(phydev);
738 if (err < 0)
739 goto out_unlock;
740
741 if (phy_is_started(phydev))
742 err = phy_check_link_status(phydev);
743out_unlock:
744 mutex_unlock(&phydev->lock);
745
746 return err;
747}
748EXPORT_SYMBOL(phy_start_aneg);
749
750static int phy_poll_aneg_done(struct phy_device *phydev)
751{
752 unsigned int retries = 100;
753 int ret;
754
755 do {
756 msleep(100);
757 ret = phy_aneg_done(phydev);
758 } while (!ret && --retries);
759
760 if (!ret)
761 return -ETIMEDOUT;
762
763 return ret < 0 ? ret : 0;
764}
765
766/**
767 * phy_speed_down - set speed to lowest speed supported by both link partners
768 * @phydev: the phy_device struct
769 * @sync: perform action synchronously
770 *
771 * Description: Typically used to save energy when waiting for a WoL packet
772 *
773 * WARNING: Setting sync to false may cause the system being unable to suspend
774 * in case the PHY generates an interrupt when finishing the autonegotiation.
775 * This interrupt may wake up the system immediately after suspend.
776 * Therefore use sync = false only if you're sure it's safe with the respective
777 * network chip.
778 */
779int phy_speed_down(struct phy_device *phydev, bool sync)
780{
781 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
782 int ret;
783
784 if (phydev->autoneg != AUTONEG_ENABLE)
785 return 0;
786
787 linkmode_copy(adv_tmp, phydev->advertising);
788
789 ret = phy_speed_down_core(phydev);
790 if (ret)
791 return ret;
792
793 linkmode_copy(phydev->adv_old, adv_tmp);
794
795 if (linkmode_equal(phydev->advertising, adv_tmp))
796 return 0;
797
798 ret = phy_config_aneg(phydev);
799 if (ret)
800 return ret;
801
802 return sync ? phy_poll_aneg_done(phydev) : 0;
803}
804EXPORT_SYMBOL_GPL(phy_speed_down);
805
806/**
807 * phy_speed_up - (re)set advertised speeds to all supported speeds
808 * @phydev: the phy_device struct
809 *
810 * Description: Used to revert the effect of phy_speed_down
811 */
812int phy_speed_up(struct phy_device *phydev)
813{
814 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
815
816 if (phydev->autoneg != AUTONEG_ENABLE)
817 return 0;
818
819 if (linkmode_empty(phydev->adv_old))
820 return 0;
821
822 linkmode_copy(adv_tmp, phydev->advertising);
823 linkmode_copy(phydev->advertising, phydev->adv_old);
824 linkmode_zero(phydev->adv_old);
825
826 if (linkmode_equal(phydev->advertising, adv_tmp))
827 return 0;
828
829 return phy_config_aneg(phydev);
830}
831EXPORT_SYMBOL_GPL(phy_speed_up);
832
833/**
834 * phy_start_machine - start PHY state machine tracking
835 * @phydev: the phy_device struct
836 *
837 * Description: The PHY infrastructure can run a state machine
838 * which tracks whether the PHY is starting up, negotiating,
839 * etc. This function starts the delayed workqueue which tracks
840 * the state of the PHY. If you want to maintain your own state machine,
841 * do not call this function.
842 */
843void phy_start_machine(struct phy_device *phydev)
844{
845 phy_trigger_machine(phydev);
846}
847EXPORT_SYMBOL_GPL(phy_start_machine);
848
849/**
850 * phy_stop_machine - stop the PHY state machine tracking
851 * @phydev: target phy_device struct
852 *
853 * Description: Stops the state machine delayed workqueue, sets the
854 * state to UP (unless it wasn't up yet). This function must be
855 * called BEFORE phy_detach.
856 */
857void phy_stop_machine(struct phy_device *phydev)
858{
859 cancel_delayed_work_sync(&phydev->state_queue);
860
861 mutex_lock(&phydev->lock);
862 if (phy_is_started(phydev))
863 phydev->state = PHY_UP;
864 mutex_unlock(&phydev->lock);
865}
866
867/**
868 * phy_error - enter HALTED state for this PHY device
869 * @phydev: target phy_device struct
870 *
871 * Moves the PHY to the HALTED state in response to a read
872 * or write error, and tells the controller the link is down.
873 * Must not be called from interrupt context, or while the
874 * phydev->lock is held.
875 */
876static void phy_error(struct phy_device *phydev)
877{
878 WARN_ON(1);
879
880 mutex_lock(&phydev->lock);
881 phydev->state = PHY_HALTED;
882 mutex_unlock(&phydev->lock);
883
884 phy_trigger_machine(phydev);
885}
886
887/**
888 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
889 * @phydev: target phy_device struct
890 */
891int phy_disable_interrupts(struct phy_device *phydev)
892{
893 int err;
894
895 /* Disable PHY interrupts */
896 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
897 if (err)
898 return err;
899
900 /* Clear the interrupt */
901 return phy_clear_interrupt(phydev);
902}
903
904/**
905 * phy_interrupt - PHY interrupt handler
906 * @irq: interrupt line
907 * @phy_dat: phy_device pointer
908 *
909 * Description: Handle PHY interrupt
910 */
911static irqreturn_t phy_interrupt(int irq, void *phy_dat)
912{
913 struct phy_device *phydev = phy_dat;
914 struct phy_driver *drv = phydev->drv;
915
916 if (drv->handle_interrupt)
917 return drv->handle_interrupt(phydev);
918
919 if (drv->did_interrupt && !drv->did_interrupt(phydev))
920 return IRQ_NONE;
921
922 /* reschedule state queue work to run as soon as possible */
923 phy_trigger_machine(phydev);
924
925 /* did_interrupt() may have cleared the interrupt already */
926 if (!drv->did_interrupt && phy_clear_interrupt(phydev)) {
927 phy_error(phydev);
928 return IRQ_NONE;
929 }
930
931 return IRQ_HANDLED;
932}
933
934/**
935 * phy_enable_interrupts - Enable the interrupts from the PHY side
936 * @phydev: target phy_device struct
937 */
938static int phy_enable_interrupts(struct phy_device *phydev)
939{
940 int err = phy_clear_interrupt(phydev);
941
942 if (err < 0)
943 return err;
944
945 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
946}
947
948/**
949 * phy_request_interrupt - request and enable interrupt for a PHY device
950 * @phydev: target phy_device struct
951 *
952 * Description: Request and enable the interrupt for the given PHY.
953 * If this fails, then we set irq to PHY_POLL.
954 * This should only be called with a valid IRQ number.
955 */
956void phy_request_interrupt(struct phy_device *phydev)
957{
958 int err;
959
960 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
961 IRQF_ONESHOT | IRQF_SHARED,
962 phydev_name(phydev), phydev);
963 if (err) {
964 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
965 err, phydev->irq);
966 phydev->irq = PHY_POLL;
967 } else {
968 if (phy_enable_interrupts(phydev)) {
969 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
970 phy_free_interrupt(phydev);
971 phydev->irq = PHY_POLL;
972 }
973 }
974}
975EXPORT_SYMBOL(phy_request_interrupt);
976
977/**
978 * phy_free_interrupt - disable and free interrupt for a PHY device
979 * @phydev: target phy_device struct
980 *
981 * Description: Disable and free the interrupt for the given PHY.
982 * This should only be called with a valid IRQ number.
983 */
984void phy_free_interrupt(struct phy_device *phydev)
985{
986 phy_disable_interrupts(phydev);
987 free_irq(phydev->irq, phydev);
988}
989EXPORT_SYMBOL(phy_free_interrupt);
990
991/**
992 * phy_stop - Bring down the PHY link, and stop checking the status
993 * @phydev: target phy_device struct
994 */
995void phy_stop(struct phy_device *phydev)
996{
997 struct net_device *dev = phydev->attached_dev;
998
999 if (!phy_is_started(phydev) && phydev->state != PHY_DOWN) {
1000 WARN(1, "called from state %s\n",
1001 phy_state_to_str(phydev->state));
1002 return;
1003 }
1004
1005 mutex_lock(&phydev->lock);
1006
1007 if (phydev->state == PHY_CABLETEST) {
1008 phy_abort_cable_test(phydev);
1009 netif_testing_off(dev);
1010 }
1011
1012 if (phydev->sfp_bus)
1013 sfp_upstream_stop(phydev->sfp_bus);
1014
1015 phydev->state = PHY_HALTED;
1016
1017 mutex_unlock(&phydev->lock);
1018
1019 phy_state_machine(&phydev->state_queue.work);
1020 phy_stop_machine(phydev);
1021
1022 /* Cannot call flush_scheduled_work() here as desired because
1023 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
1024 * will not reenable interrupts.
1025 */
1026}
1027EXPORT_SYMBOL(phy_stop);
1028
1029/**
1030 * phy_start - start or restart a PHY device
1031 * @phydev: target phy_device struct
1032 *
1033 * Description: Indicates the attached device's readiness to
1034 * handle PHY-related work. Used during startup to start the
1035 * PHY, and after a call to phy_stop() to resume operation.
1036 * Also used to indicate the MDIO bus has cleared an error
1037 * condition.
1038 */
1039void phy_start(struct phy_device *phydev)
1040{
1041 mutex_lock(&phydev->lock);
1042
1043 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
1044 WARN(1, "called from state %s\n",
1045 phy_state_to_str(phydev->state));
1046 goto out;
1047 }
1048
1049 if (phydev->sfp_bus)
1050 sfp_upstream_start(phydev->sfp_bus);
1051
1052 /* if phy was suspended, bring the physical link up again */
1053 __phy_resume(phydev);
1054
1055 phydev->state = PHY_UP;
1056
1057 phy_start_machine(phydev);
1058out:
1059 mutex_unlock(&phydev->lock);
1060}
1061EXPORT_SYMBOL(phy_start);
1062
1063/**
1064 * phy_state_machine - Handle the state machine
1065 * @work: work_struct that describes the work to be done
1066 */
1067void phy_state_machine(struct work_struct *work)
1068{
1069 struct delayed_work *dwork = to_delayed_work(work);
1070 struct phy_device *phydev =
1071 container_of(dwork, struct phy_device, state_queue);
1072 struct net_device *dev = phydev->attached_dev;
1073 bool needs_aneg = false, do_suspend = false;
1074 enum phy_state old_state;
1075 bool finished = false;
1076 int err = 0;
1077
1078 mutex_lock(&phydev->lock);
1079
1080 old_state = phydev->state;
1081
1082 switch (phydev->state) {
1083 case PHY_DOWN:
1084 case PHY_READY:
1085 break;
1086 case PHY_UP:
1087 needs_aneg = true;
1088
1089 break;
1090 case PHY_NOLINK:
1091 case PHY_RUNNING:
1092 err = phy_check_link_status(phydev);
1093 break;
1094 case PHY_CABLETEST:
1095 err = phydev->drv->cable_test_get_status(phydev, &finished);
1096 if (err) {
1097 phy_abort_cable_test(phydev);
1098 netif_testing_off(dev);
1099 needs_aneg = true;
1100 phydev->state = PHY_UP;
1101 break;
1102 }
1103
1104 if (finished) {
1105 ethnl_cable_test_finished(phydev);
1106 netif_testing_off(dev);
1107 needs_aneg = true;
1108 phydev->state = PHY_UP;
1109 }
1110 break;
1111 case PHY_HALTED:
1112 if (phydev->link) {
1113 phydev->link = 0;
1114 phy_link_down(phydev);
1115 }
1116 do_suspend = true;
1117 break;
1118 }
1119
1120 mutex_unlock(&phydev->lock);
1121
1122 if (needs_aneg)
1123 err = phy_start_aneg(phydev);
1124 else if (do_suspend)
1125 phy_suspend(phydev);
1126
1127 if (err < 0)
1128 phy_error(phydev);
1129
1130 if (old_state != phydev->state) {
1131 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1132 phy_state_to_str(old_state),
1133 phy_state_to_str(phydev->state));
1134 if (phydev->drv && phydev->drv->link_change_notify)
1135 phydev->drv->link_change_notify(phydev);
1136 }
1137
1138 /* Only re-schedule a PHY state machine change if we are polling the
1139 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1140 * between states from phy_mac_interrupt().
1141 *
1142 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
1143 * state machine would be pointless and possibly error prone when
1144 * called from phy_disconnect() synchronously.
1145 */
1146 mutex_lock(&phydev->lock);
1147 if (phy_polling_mode(phydev) && phy_is_started(phydev))
1148 phy_queue_state_machine(phydev, PHY_STATE_TIME);
1149 mutex_unlock(&phydev->lock);
1150}
1151
1152/**
1153 * phy_mac_interrupt - MAC says the link has changed
1154 * @phydev: phy_device struct with changed link
1155 *
1156 * The MAC layer is able to indicate there has been a change in the PHY link
1157 * status. Trigger the state machine and work a work queue.
1158 */
1159void phy_mac_interrupt(struct phy_device *phydev)
1160{
1161 /* Trigger a state machine change */
1162 phy_trigger_machine(phydev);
1163}
1164EXPORT_SYMBOL(phy_mac_interrupt);
1165
1166static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
1167{
1168 linkmode_zero(advertising);
1169
1170 if (eee_adv & MDIO_EEE_100TX)
1171 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
1172 advertising);
1173 if (eee_adv & MDIO_EEE_1000T)
1174 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
1175 advertising);
1176 if (eee_adv & MDIO_EEE_10GT)
1177 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
1178 advertising);
1179 if (eee_adv & MDIO_EEE_1000KX)
1180 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
1181 advertising);
1182 if (eee_adv & MDIO_EEE_10GKX4)
1183 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
1184 advertising);
1185 if (eee_adv & MDIO_EEE_10GKR)
1186 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
1187 advertising);
1188}
1189
1190/**
1191 * phy_init_eee - init and check the EEE feature
1192 * @phydev: target phy_device struct
1193 * @clk_stop_enable: PHY may stop the clock during LPI
1194 *
1195 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1196 * is supported by looking at the MMD registers 3.20 and 7.60/61
1197 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1198 * bit if required.
1199 */
1200int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1201{
1202 if (!phydev->drv)
1203 return -EIO;
1204
1205 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1206 */
1207 if (phydev->duplex == DUPLEX_FULL) {
1208 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1209 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1210 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1211 int eee_lp, eee_cap, eee_adv;
1212 int status;
1213 u32 cap;
1214
1215 /* Read phy status to properly get the right settings */
1216 status = phy_read_status(phydev);
1217 if (status)
1218 return status;
1219
1220 /* First check if the EEE ability is supported */
1221 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1222 if (eee_cap <= 0)
1223 goto eee_exit_err;
1224
1225 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1226 if (!cap)
1227 goto eee_exit_err;
1228
1229 /* Check which link settings negotiated and verify it in
1230 * the EEE advertising registers.
1231 */
1232 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1233 if (eee_lp <= 0)
1234 goto eee_exit_err;
1235
1236 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1237 if (eee_adv <= 0)
1238 goto eee_exit_err;
1239
1240 mmd_eee_adv_to_linkmode(adv, eee_adv);
1241 mmd_eee_adv_to_linkmode(lp, eee_lp);
1242 linkmode_and(common, adv, lp);
1243
1244 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1245 goto eee_exit_err;
1246
1247 if (clk_stop_enable)
1248 /* Configure the PHY to stop receiving xMII
1249 * clock while it is signaling LPI.
1250 */
1251 phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1252 MDIO_PCS_CTRL1_CLKSTOP_EN);
1253
1254 return 0; /* EEE supported */
1255 }
1256eee_exit_err:
1257 return -EPROTONOSUPPORT;
1258}
1259EXPORT_SYMBOL(phy_init_eee);
1260
1261/**
1262 * phy_get_eee_err - report the EEE wake error count
1263 * @phydev: target phy_device struct
1264 *
1265 * Description: it is to report the number of time where the PHY
1266 * failed to complete its normal wake sequence.
1267 */
1268int phy_get_eee_err(struct phy_device *phydev)
1269{
1270 if (!phydev->drv)
1271 return -EIO;
1272
1273 return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1274}
1275EXPORT_SYMBOL(phy_get_eee_err);
1276
1277/**
1278 * phy_ethtool_get_eee - get EEE supported and status
1279 * @phydev: target phy_device struct
1280 * @data: ethtool_eee data
1281 *
1282 * Description: it reportes the Supported/Advertisement/LP Advertisement
1283 * capabilities.
1284 */
1285int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1286{
1287 int val;
1288
1289 if (!phydev->drv)
1290 return -EIO;
1291
1292 /* Get Supported EEE */
1293 val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1294 if (val < 0)
1295 return val;
1296 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1297
1298 /* Get advertisement EEE */
1299 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1300 if (val < 0)
1301 return val;
1302 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1303 data->eee_enabled = !!data->advertised;
1304
1305 /* Get LP advertisement EEE */
1306 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1307 if (val < 0)
1308 return val;
1309 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1310
1311 data->eee_active = !!(data->advertised & data->lp_advertised);
1312
1313 return 0;
1314}
1315EXPORT_SYMBOL(phy_ethtool_get_eee);
1316
1317/**
1318 * phy_ethtool_set_eee - set EEE supported and status
1319 * @phydev: target phy_device struct
1320 * @data: ethtool_eee data
1321 *
1322 * Description: it is to program the Advertisement EEE register.
1323 */
1324int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1325{
1326 int cap, old_adv, adv = 0, ret;
1327
1328 if (!phydev->drv)
1329 return -EIO;
1330
1331 /* Get Supported EEE */
1332 cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1333 if (cap < 0)
1334 return cap;
1335
1336 old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1337 if (old_adv < 0)
1338 return old_adv;
1339
1340 if (data->eee_enabled) {
1341 adv = !data->advertised ? cap :
1342 ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1343 /* Mask prohibited EEE modes */
1344 adv &= ~phydev->eee_broken_modes;
1345 }
1346
1347 if (old_adv != adv) {
1348 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1349 if (ret < 0)
1350 return ret;
1351
1352 /* Restart autonegotiation so the new modes get sent to the
1353 * link partner.
1354 */
1355 if (phydev->autoneg == AUTONEG_ENABLE) {
1356 ret = phy_restart_aneg(phydev);
1357 if (ret < 0)
1358 return ret;
1359 }
1360 }
1361
1362 return 0;
1363}
1364EXPORT_SYMBOL(phy_ethtool_set_eee);
1365
1366int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1367{
1368 if (phydev->drv && phydev->drv->set_wol)
1369 return phydev->drv->set_wol(phydev, wol);
1370
1371 return -EOPNOTSUPP;
1372}
1373EXPORT_SYMBOL(phy_ethtool_set_wol);
1374
1375void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1376{
1377 if (phydev->drv && phydev->drv->get_wol)
1378 phydev->drv->get_wol(phydev, wol);
1379}
1380EXPORT_SYMBOL(phy_ethtool_get_wol);
1381
1382int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1383 struct ethtool_link_ksettings *cmd)
1384{
1385 struct phy_device *phydev = ndev->phydev;
1386
1387 if (!phydev)
1388 return -ENODEV;
1389
1390 phy_ethtool_ksettings_get(phydev, cmd);
1391
1392 return 0;
1393}
1394EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1395
1396int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1397 const struct ethtool_link_ksettings *cmd)
1398{
1399 struct phy_device *phydev = ndev->phydev;
1400
1401 if (!phydev)
1402 return -ENODEV;
1403
1404 return phy_ethtool_ksettings_set(phydev, cmd);
1405}
1406EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1407
1408int phy_ethtool_nway_reset(struct net_device *ndev)
1409{
1410 struct phy_device *phydev = ndev->phydev;
1411
1412 if (!phydev)
1413 return -ENODEV;
1414
1415 if (!phydev->drv)
1416 return -EIO;
1417
1418 return phy_restart_aneg(phydev);
1419}
1420EXPORT_SYMBOL(phy_ethtool_nway_reset);