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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/* Framework for configuring and reading PHY devices
2 * Based on code in sungem_phy.c and gianfar_phy.c
3 *
4 * Author: Andy Fleming
5 *
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
7 * Copyright (c) 2006, 2007 Maciej W. Rozycki
8 *
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.
13 *
14 */
15
16#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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/delay.h>
24#include <linux/netdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/skbuff.h>
27#include <linux/mm.h>
28#include <linux/module.h>
29#include <linux/mii.h>
30#include <linux/ethtool.h>
31#include <linux/phy.h>
32#include <linux/phy_led_triggers.h>
33#include <linux/timer.h>
34#include <linux/workqueue.h>
35#include <linux/mdio.h>
36#include <linux/io.h>
37#include <linux/uaccess.h>
38#include <linux/atomic.h>
39
40#include <asm/irq.h>
41
42static const char *phy_speed_to_str(int speed)
43{
44 switch (speed) {
45 case SPEED_10:
46 return "10Mbps";
47 case SPEED_100:
48 return "100Mbps";
49 case SPEED_1000:
50 return "1Gbps";
51 case SPEED_2500:
52 return "2.5Gbps";
53 case SPEED_10000:
54 return "10Gbps";
55 case SPEED_UNKNOWN:
56 return "Unknown";
57 default:
58 return "Unsupported (update phy.c)";
59 }
60}
61
62#define PHY_STATE_STR(_state) \
63 case PHY_##_state: \
64 return __stringify(_state); \
65
66static const char *phy_state_to_str(enum phy_state st)
67{
68 switch (st) {
69 PHY_STATE_STR(DOWN)
70 PHY_STATE_STR(STARTING)
71 PHY_STATE_STR(READY)
72 PHY_STATE_STR(PENDING)
73 PHY_STATE_STR(UP)
74 PHY_STATE_STR(AN)
75 PHY_STATE_STR(RUNNING)
76 PHY_STATE_STR(NOLINK)
77 PHY_STATE_STR(FORCING)
78 PHY_STATE_STR(CHANGELINK)
79 PHY_STATE_STR(HALTED)
80 PHY_STATE_STR(RESUMING)
81 }
82
83 return NULL;
84}
85
86
87/**
88 * phy_print_status - Convenience function to print out the current phy status
89 * @phydev: the phy_device struct
90 */
91void phy_print_status(struct phy_device *phydev)
92{
93 if (phydev->link) {
94 netdev_info(phydev->attached_dev,
95 "Link is Up - %s/%s - flow control %s\n",
96 phy_speed_to_str(phydev->speed),
97 DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
98 phydev->pause ? "rx/tx" : "off");
99 } else {
100 netdev_info(phydev->attached_dev, "Link is Down\n");
101 }
102}
103EXPORT_SYMBOL(phy_print_status);
104
105/**
106 * phy_clear_interrupt - Ack the phy device's interrupt
107 * @phydev: the phy_device struct
108 *
109 * If the @phydev driver has an ack_interrupt function, call it to
110 * ack and clear the phy device's interrupt.
111 *
112 * Returns 0 on success or < 0 on error.
113 */
114static int phy_clear_interrupt(struct phy_device *phydev)
115{
116 if (phydev->drv->ack_interrupt)
117 return phydev->drv->ack_interrupt(phydev);
118
119 return 0;
120}
121
122/**
123 * phy_config_interrupt - configure the PHY device for the requested interrupts
124 * @phydev: the phy_device struct
125 * @interrupts: interrupt flags to configure for this @phydev
126 *
127 * Returns 0 on success or < 0 on error.
128 */
129static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
130{
131 phydev->interrupts = interrupts;
132 if (phydev->drv->config_intr)
133 return phydev->drv->config_intr(phydev);
134
135 return 0;
136}
137
138
139/**
140 * phy_aneg_done - return auto-negotiation status
141 * @phydev: target phy_device struct
142 *
143 * Description: Return the auto-negotiation status from this @phydev
144 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
145 * is still pending.
146 */
147int phy_aneg_done(struct phy_device *phydev)
148{
149 if (phydev->drv->aneg_done)
150 return phydev->drv->aneg_done(phydev);
151
152 return genphy_aneg_done(phydev);
153}
154EXPORT_SYMBOL(phy_aneg_done);
155
156/* A structure for mapping a particular speed and duplex
157 * combination to a particular SUPPORTED and ADVERTISED value
158 */
159struct phy_setting {
160 int speed;
161 int duplex;
162 u32 setting;
163};
164
165/* A mapping of all SUPPORTED settings to speed/duplex */
166static const struct phy_setting settings[] = {
167 {
168 .speed = SPEED_10000,
169 .duplex = DUPLEX_FULL,
170 .setting = SUPPORTED_10000baseKR_Full,
171 },
172 {
173 .speed = SPEED_10000,
174 .duplex = DUPLEX_FULL,
175 .setting = SUPPORTED_10000baseKX4_Full,
176 },
177 {
178 .speed = SPEED_10000,
179 .duplex = DUPLEX_FULL,
180 .setting = SUPPORTED_10000baseT_Full,
181 },
182 {
183 .speed = SPEED_2500,
184 .duplex = DUPLEX_FULL,
185 .setting = SUPPORTED_2500baseX_Full,
186 },
187 {
188 .speed = SPEED_1000,
189 .duplex = DUPLEX_FULL,
190 .setting = SUPPORTED_1000baseKX_Full,
191 },
192 {
193 .speed = SPEED_1000,
194 .duplex = DUPLEX_FULL,
195 .setting = SUPPORTED_1000baseT_Full,
196 },
197 {
198 .speed = SPEED_1000,
199 .duplex = DUPLEX_HALF,
200 .setting = SUPPORTED_1000baseT_Half,
201 },
202 {
203 .speed = SPEED_100,
204 .duplex = DUPLEX_FULL,
205 .setting = SUPPORTED_100baseT_Full,
206 },
207 {
208 .speed = SPEED_100,
209 .duplex = DUPLEX_HALF,
210 .setting = SUPPORTED_100baseT_Half,
211 },
212 {
213 .speed = SPEED_10,
214 .duplex = DUPLEX_FULL,
215 .setting = SUPPORTED_10baseT_Full,
216 },
217 {
218 .speed = SPEED_10,
219 .duplex = DUPLEX_HALF,
220 .setting = SUPPORTED_10baseT_Half,
221 },
222};
223
224#define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
225
226/**
227 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
228 * @speed: speed to match
229 * @duplex: duplex to match
230 *
231 * Description: Searches the settings array for the setting which
232 * matches the desired speed and duplex, and returns the index
233 * of that setting. Returns the index of the last setting if
234 * none of the others match.
235 */
236static inline unsigned int phy_find_setting(int speed, int duplex)
237{
238 unsigned int idx = 0;
239
240 while (idx < ARRAY_SIZE(settings) &&
241 (settings[idx].speed != speed || settings[idx].duplex != duplex))
242 idx++;
243
244 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
245}
246
247/**
248 * phy_find_valid - find a PHY setting that matches the requested features mask
249 * @idx: The first index in settings[] to search
250 * @features: A mask of the valid settings
251 *
252 * Description: Returns the index of the first valid setting less
253 * than or equal to the one pointed to by idx, as determined by
254 * the mask in features. Returns the index of the last setting
255 * if nothing else matches.
256 */
257static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
258{
259 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
260 idx++;
261
262 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
263}
264
265/**
266 * phy_supported_speeds - return all speeds currently supported by a phy device
267 * @phy: The phy device to return supported speeds of.
268 * @speeds: buffer to store supported speeds in.
269 * @size: size of speeds buffer.
270 *
271 * Description: Returns the number of supported speeds, and fills the speeds
272 * buffer with the supported speeds. If speeds buffer is too small to contain
273 * all currently supported speeds, will return as many speeds as can fit.
274 */
275unsigned int phy_supported_speeds(struct phy_device *phy,
276 unsigned int *speeds,
277 unsigned int size)
278{
279 unsigned int count = 0;
280 unsigned int idx = 0;
281
282 while (idx < MAX_NUM_SETTINGS && count < size) {
283 idx = phy_find_valid(idx, phy->supported);
284
285 if (!(settings[idx].setting & phy->supported))
286 break;
287
288 /* Assumes settings are grouped by speed */
289 if ((count == 0) ||
290 (speeds[count - 1] != settings[idx].speed)) {
291 speeds[count] = settings[idx].speed;
292 count++;
293 }
294 idx++;
295 }
296
297 return count;
298}
299
300/**
301 * phy_check_valid - check if there is a valid PHY setting which matches
302 * speed, duplex, and feature mask
303 * @speed: speed to match
304 * @duplex: duplex to match
305 * @features: A mask of the valid settings
306 *
307 * Description: Returns true if there is a valid setting, false otherwise.
308 */
309static inline bool phy_check_valid(int speed, int duplex, u32 features)
310{
311 unsigned int idx;
312
313 idx = phy_find_valid(phy_find_setting(speed, duplex), features);
314
315 return settings[idx].speed == speed && settings[idx].duplex == duplex &&
316 (settings[idx].setting & features);
317}
318
319/**
320 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
321 * @phydev: the target phy_device struct
322 *
323 * Description: Make sure the PHY is set to supported speeds and
324 * duplexes. Drop down by one in this order: 1000/FULL,
325 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
326 */
327static void phy_sanitize_settings(struct phy_device *phydev)
328{
329 u32 features = phydev->supported;
330 unsigned int idx;
331
332 /* Sanitize settings based on PHY capabilities */
333 if ((features & SUPPORTED_Autoneg) == 0)
334 phydev->autoneg = AUTONEG_DISABLE;
335
336 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
337 features);
338
339 phydev->speed = settings[idx].speed;
340 phydev->duplex = settings[idx].duplex;
341}
342
343/**
344 * phy_ethtool_sset - generic ethtool sset function, handles all the details
345 * @phydev: target phy_device struct
346 * @cmd: ethtool_cmd
347 *
348 * A few notes about parameter checking:
349 * - We don't set port or transceiver, so we don't care what they
350 * were set to.
351 * - phy_start_aneg() will make sure forced settings are sane, and
352 * choose the next best ones from the ones selected, so we don't
353 * care if ethtool tries to give us bad values.
354 */
355int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
356{
357 u32 speed = ethtool_cmd_speed(cmd);
358
359 if (cmd->phy_address != phydev->mdio.addr)
360 return -EINVAL;
361
362 /* We make sure that we don't pass unsupported values in to the PHY */
363 cmd->advertising &= phydev->supported;
364
365 /* Verify the settings we care about. */
366 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
367 return -EINVAL;
368
369 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
370 return -EINVAL;
371
372 if (cmd->autoneg == AUTONEG_DISABLE &&
373 ((speed != SPEED_1000 &&
374 speed != SPEED_100 &&
375 speed != SPEED_10) ||
376 (cmd->duplex != DUPLEX_HALF &&
377 cmd->duplex != DUPLEX_FULL)))
378 return -EINVAL;
379
380 phydev->autoneg = cmd->autoneg;
381
382 phydev->speed = speed;
383
384 phydev->advertising = cmd->advertising;
385
386 if (AUTONEG_ENABLE == cmd->autoneg)
387 phydev->advertising |= ADVERTISED_Autoneg;
388 else
389 phydev->advertising &= ~ADVERTISED_Autoneg;
390
391 phydev->duplex = cmd->duplex;
392
393 phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
394
395 /* Restart the PHY */
396 phy_start_aneg(phydev);
397
398 return 0;
399}
400EXPORT_SYMBOL(phy_ethtool_sset);
401
402int phy_ethtool_ksettings_set(struct phy_device *phydev,
403 const struct ethtool_link_ksettings *cmd)
404{
405 u8 autoneg = cmd->base.autoneg;
406 u8 duplex = cmd->base.duplex;
407 u32 speed = cmd->base.speed;
408 u32 advertising;
409
410 if (cmd->base.phy_address != phydev->mdio.addr)
411 return -EINVAL;
412
413 ethtool_convert_link_mode_to_legacy_u32(&advertising,
414 cmd->link_modes.advertising);
415
416 /* We make sure that we don't pass unsupported values in to the PHY */
417 advertising &= phydev->supported;
418
419 /* Verify the settings we care about. */
420 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
421 return -EINVAL;
422
423 if (autoneg == AUTONEG_ENABLE && advertising == 0)
424 return -EINVAL;
425
426 if (autoneg == AUTONEG_DISABLE &&
427 ((speed != SPEED_1000 &&
428 speed != SPEED_100 &&
429 speed != SPEED_10) ||
430 (duplex != DUPLEX_HALF &&
431 duplex != DUPLEX_FULL)))
432 return -EINVAL;
433
434 phydev->autoneg = autoneg;
435
436 phydev->speed = speed;
437
438 phydev->advertising = advertising;
439
440 if (autoneg == AUTONEG_ENABLE)
441 phydev->advertising |= ADVERTISED_Autoneg;
442 else
443 phydev->advertising &= ~ADVERTISED_Autoneg;
444
445 phydev->duplex = duplex;
446
447 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
448
449 /* Restart the PHY */
450 phy_start_aneg(phydev);
451
452 return 0;
453}
454EXPORT_SYMBOL(phy_ethtool_ksettings_set);
455
456int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
457{
458 cmd->supported = phydev->supported;
459
460 cmd->advertising = phydev->advertising;
461 cmd->lp_advertising = phydev->lp_advertising;
462
463 ethtool_cmd_speed_set(cmd, phydev->speed);
464 cmd->duplex = phydev->duplex;
465 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
466 cmd->port = PORT_BNC;
467 else
468 cmd->port = PORT_MII;
469 cmd->phy_address = phydev->mdio.addr;
470 cmd->transceiver = phy_is_internal(phydev) ?
471 XCVR_INTERNAL : XCVR_EXTERNAL;
472 cmd->autoneg = phydev->autoneg;
473 cmd->eth_tp_mdix_ctrl = phydev->mdix_ctrl;
474 cmd->eth_tp_mdix = phydev->mdix;
475
476 return 0;
477}
478EXPORT_SYMBOL(phy_ethtool_gset);
479
480int phy_ethtool_ksettings_get(struct phy_device *phydev,
481 struct ethtool_link_ksettings *cmd)
482{
483 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
484 phydev->supported);
485
486 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
487 phydev->advertising);
488
489 ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
490 phydev->lp_advertising);
491
492 cmd->base.speed = phydev->speed;
493 cmd->base.duplex = phydev->duplex;
494 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
495 cmd->base.port = PORT_BNC;
496 else
497 cmd->base.port = PORT_MII;
498
499 cmd->base.phy_address = phydev->mdio.addr;
500 cmd->base.autoneg = phydev->autoneg;
501 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
502 cmd->base.eth_tp_mdix = phydev->mdix;
503
504 return 0;
505}
506EXPORT_SYMBOL(phy_ethtool_ksettings_get);
507
508/**
509 * phy_mii_ioctl - generic PHY MII ioctl interface
510 * @phydev: the phy_device struct
511 * @ifr: &struct ifreq for socket ioctl's
512 * @cmd: ioctl cmd to execute
513 *
514 * Note that this function is currently incompatible with the
515 * PHYCONTROL layer. It changes registers without regard to
516 * current state. Use at own risk.
517 */
518int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
519{
520 struct mii_ioctl_data *mii_data = if_mii(ifr);
521 u16 val = mii_data->val_in;
522 bool change_autoneg = false;
523
524 switch (cmd) {
525 case SIOCGMIIPHY:
526 mii_data->phy_id = phydev->mdio.addr;
527 /* fall through */
528
529 case SIOCGMIIREG:
530 mii_data->val_out = mdiobus_read(phydev->mdio.bus,
531 mii_data->phy_id,
532 mii_data->reg_num);
533 return 0;
534
535 case SIOCSMIIREG:
536 if (mii_data->phy_id == phydev->mdio.addr) {
537 switch (mii_data->reg_num) {
538 case MII_BMCR:
539 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
540 if (phydev->autoneg == AUTONEG_ENABLE)
541 change_autoneg = true;
542 phydev->autoneg = AUTONEG_DISABLE;
543 if (val & BMCR_FULLDPLX)
544 phydev->duplex = DUPLEX_FULL;
545 else
546 phydev->duplex = DUPLEX_HALF;
547 if (val & BMCR_SPEED1000)
548 phydev->speed = SPEED_1000;
549 else if (val & BMCR_SPEED100)
550 phydev->speed = SPEED_100;
551 else phydev->speed = SPEED_10;
552 }
553 else {
554 if (phydev->autoneg == AUTONEG_DISABLE)
555 change_autoneg = true;
556 phydev->autoneg = AUTONEG_ENABLE;
557 }
558 break;
559 case MII_ADVERTISE:
560 phydev->advertising = mii_adv_to_ethtool_adv_t(val);
561 change_autoneg = true;
562 break;
563 default:
564 /* do nothing */
565 break;
566 }
567 }
568
569 mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
570 mii_data->reg_num, val);
571
572 if (mii_data->phy_id == phydev->mdio.addr &&
573 mii_data->reg_num == MII_BMCR &&
574 val & BMCR_RESET)
575 return phy_init_hw(phydev);
576
577 if (change_autoneg)
578 return phy_start_aneg(phydev);
579
580 return 0;
581
582 case SIOCSHWTSTAMP:
583 if (phydev->drv->hwtstamp)
584 return phydev->drv->hwtstamp(phydev, ifr);
585 /* fall through */
586
587 default:
588 return -EOPNOTSUPP;
589 }
590}
591EXPORT_SYMBOL(phy_mii_ioctl);
592
593/**
594 * phy_start_aneg - start auto-negotiation for this PHY device
595 * @phydev: the phy_device struct
596 *
597 * Description: Sanitizes the settings (if we're not autonegotiating
598 * them), and then calls the driver's config_aneg function.
599 * If the PHYCONTROL Layer is operating, we change the state to
600 * reflect the beginning of Auto-negotiation or forcing.
601 */
602int phy_start_aneg(struct phy_device *phydev)
603{
604 int err;
605
606 mutex_lock(&phydev->lock);
607
608 if (AUTONEG_DISABLE == phydev->autoneg)
609 phy_sanitize_settings(phydev);
610
611 /* Invalidate LP advertising flags */
612 phydev->lp_advertising = 0;
613
614 err = phydev->drv->config_aneg(phydev);
615 if (err < 0)
616 goto out_unlock;
617
618 if (phydev->state != PHY_HALTED) {
619 if (AUTONEG_ENABLE == phydev->autoneg) {
620 phydev->state = PHY_AN;
621 phydev->link_timeout = PHY_AN_TIMEOUT;
622 } else {
623 phydev->state = PHY_FORCING;
624 phydev->link_timeout = PHY_FORCE_TIMEOUT;
625 }
626 }
627
628out_unlock:
629 mutex_unlock(&phydev->lock);
630 return err;
631}
632EXPORT_SYMBOL(phy_start_aneg);
633
634/**
635 * phy_start_machine - start PHY state machine tracking
636 * @phydev: the phy_device struct
637 *
638 * Description: The PHY infrastructure can run a state machine
639 * which tracks whether the PHY is starting up, negotiating,
640 * etc. This function starts the timer which tracks the state
641 * of the PHY. If you want to maintain your own state machine,
642 * do not call this function.
643 */
644void phy_start_machine(struct phy_device *phydev)
645{
646 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
647}
648
649/**
650 * phy_trigger_machine - trigger the state machine to run
651 *
652 * @phydev: the phy_device struct
653 * @sync: indicate whether we should wait for the workqueue cancelation
654 *
655 * Description: There has been a change in state which requires that the
656 * state machine runs.
657 */
658
659static void phy_trigger_machine(struct phy_device *phydev, bool sync)
660{
661 if (sync)
662 cancel_delayed_work_sync(&phydev->state_queue);
663 else
664 cancel_delayed_work(&phydev->state_queue);
665 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
666}
667
668/**
669 * phy_stop_machine - stop the PHY state machine tracking
670 * @phydev: target phy_device struct
671 *
672 * Description: Stops the state machine timer, sets the state to UP
673 * (unless it wasn't up yet). This function must be called BEFORE
674 * phy_detach.
675 */
676void phy_stop_machine(struct phy_device *phydev)
677{
678 cancel_delayed_work_sync(&phydev->state_queue);
679
680 mutex_lock(&phydev->lock);
681 if (phydev->state > PHY_UP)
682 phydev->state = PHY_UP;
683 mutex_unlock(&phydev->lock);
684}
685
686/**
687 * phy_error - enter HALTED state for this PHY device
688 * @phydev: target phy_device struct
689 *
690 * Moves the PHY to the HALTED state in response to a read
691 * or write error, and tells the controller the link is down.
692 * Must not be called from interrupt context, or while the
693 * phydev->lock is held.
694 */
695static void phy_error(struct phy_device *phydev)
696{
697 mutex_lock(&phydev->lock);
698 phydev->state = PHY_HALTED;
699 mutex_unlock(&phydev->lock);
700
701 phy_trigger_machine(phydev, false);
702}
703
704/**
705 * phy_interrupt - PHY interrupt handler
706 * @irq: interrupt line
707 * @phy_dat: phy_device pointer
708 *
709 * Description: When a PHY interrupt occurs, the handler disables
710 * interrupts, and uses phy_change to handle the interrupt.
711 */
712static irqreturn_t phy_interrupt(int irq, void *phy_dat)
713{
714 struct phy_device *phydev = phy_dat;
715
716 if (PHY_HALTED == phydev->state)
717 return IRQ_NONE; /* It can't be ours. */
718
719 disable_irq_nosync(irq);
720 atomic_inc(&phydev->irq_disable);
721
722 phy_change(phydev);
723
724 return IRQ_HANDLED;
725}
726
727/**
728 * phy_enable_interrupts - Enable the interrupts from the PHY side
729 * @phydev: target phy_device struct
730 */
731static int phy_enable_interrupts(struct phy_device *phydev)
732{
733 int err = phy_clear_interrupt(phydev);
734
735 if (err < 0)
736 return err;
737
738 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
739}
740
741/**
742 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
743 * @phydev: target phy_device struct
744 */
745static int phy_disable_interrupts(struct phy_device *phydev)
746{
747 int err;
748
749 /* Disable PHY interrupts */
750 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
751 if (err)
752 goto phy_err;
753
754 /* Clear the interrupt */
755 err = phy_clear_interrupt(phydev);
756 if (err)
757 goto phy_err;
758
759 return 0;
760
761phy_err:
762 phy_error(phydev);
763
764 return err;
765}
766
767/**
768 * phy_start_interrupts - request and enable interrupts for a PHY device
769 * @phydev: target phy_device struct
770 *
771 * Description: Request the interrupt for the given PHY.
772 * If this fails, then we set irq to PHY_POLL.
773 * Otherwise, we enable the interrupts in the PHY.
774 * This should only be called with a valid IRQ number.
775 * Returns 0 on success or < 0 on error.
776 */
777int phy_start_interrupts(struct phy_device *phydev)
778{
779 atomic_set(&phydev->irq_disable, 0);
780 if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
781 IRQF_ONESHOT | IRQF_SHARED,
782 phydev_name(phydev), phydev) < 0) {
783 pr_warn("%s: Can't get IRQ %d (PHY)\n",
784 phydev->mdio.bus->name, phydev->irq);
785 phydev->irq = PHY_POLL;
786 return 0;
787 }
788
789 return phy_enable_interrupts(phydev);
790}
791EXPORT_SYMBOL(phy_start_interrupts);
792
793/**
794 * phy_stop_interrupts - disable interrupts from a PHY device
795 * @phydev: target phy_device struct
796 */
797int phy_stop_interrupts(struct phy_device *phydev)
798{
799 int err = phy_disable_interrupts(phydev);
800
801 if (err)
802 phy_error(phydev);
803
804 free_irq(phydev->irq, phydev);
805
806 /* If work indeed has been cancelled, disable_irq() will have
807 * been left unbalanced from phy_interrupt() and enable_irq()
808 * has to be called so that other devices on the line work.
809 */
810 while (atomic_dec_return(&phydev->irq_disable) >= 0)
811 enable_irq(phydev->irq);
812
813 return err;
814}
815EXPORT_SYMBOL(phy_stop_interrupts);
816
817/**
818 * phy_change - Called by the phy_interrupt to handle PHY changes
819 * @phydev: phy_device struct that interrupted
820 */
821void phy_change(struct phy_device *phydev)
822{
823 if (phy_interrupt_is_valid(phydev)) {
824 if (phydev->drv->did_interrupt &&
825 !phydev->drv->did_interrupt(phydev))
826 goto ignore;
827
828 if (phy_disable_interrupts(phydev))
829 goto phy_err;
830 }
831
832 mutex_lock(&phydev->lock);
833 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
834 phydev->state = PHY_CHANGELINK;
835 mutex_unlock(&phydev->lock);
836
837 if (phy_interrupt_is_valid(phydev)) {
838 atomic_dec(&phydev->irq_disable);
839 enable_irq(phydev->irq);
840
841 /* Reenable interrupts */
842 if (PHY_HALTED != phydev->state &&
843 phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
844 goto irq_enable_err;
845 }
846
847 /* reschedule state queue work to run as soon as possible */
848 phy_trigger_machine(phydev, true);
849 return;
850
851ignore:
852 atomic_dec(&phydev->irq_disable);
853 enable_irq(phydev->irq);
854 return;
855
856irq_enable_err:
857 disable_irq(phydev->irq);
858 atomic_inc(&phydev->irq_disable);
859phy_err:
860 phy_error(phydev);
861}
862
863/**
864 * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes
865 * @work: work_struct that describes the work to be done
866 */
867void phy_change_work(struct work_struct *work)
868{
869 struct phy_device *phydev =
870 container_of(work, struct phy_device, phy_queue);
871
872 phy_change(phydev);
873}
874
875/**
876 * phy_stop - Bring down the PHY link, and stop checking the status
877 * @phydev: target phy_device struct
878 */
879void phy_stop(struct phy_device *phydev)
880{
881 mutex_lock(&phydev->lock);
882
883 if (PHY_HALTED == phydev->state)
884 goto out_unlock;
885
886 if (phy_interrupt_is_valid(phydev)) {
887 /* Disable PHY Interrupts */
888 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
889
890 /* Clear any pending interrupts */
891 phy_clear_interrupt(phydev);
892 }
893
894 phydev->state = PHY_HALTED;
895
896out_unlock:
897 mutex_unlock(&phydev->lock);
898
899 /* Cannot call flush_scheduled_work() here as desired because
900 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
901 * will not reenable interrupts.
902 */
903}
904EXPORT_SYMBOL(phy_stop);
905
906/**
907 * phy_start - start or restart a PHY device
908 * @phydev: target phy_device struct
909 *
910 * Description: Indicates the attached device's readiness to
911 * handle PHY-related work. Used during startup to start the
912 * PHY, and after a call to phy_stop() to resume operation.
913 * Also used to indicate the MDIO bus has cleared an error
914 * condition.
915 */
916void phy_start(struct phy_device *phydev)
917{
918 bool do_resume = false;
919 int err = 0;
920
921 mutex_lock(&phydev->lock);
922
923 switch (phydev->state) {
924 case PHY_STARTING:
925 phydev->state = PHY_PENDING;
926 break;
927 case PHY_READY:
928 phydev->state = PHY_UP;
929 break;
930 case PHY_HALTED:
931 /* make sure interrupts are re-enabled for the PHY */
932 if (phydev->irq != PHY_POLL) {
933 err = phy_enable_interrupts(phydev);
934 if (err < 0)
935 break;
936 }
937
938 phydev->state = PHY_RESUMING;
939 do_resume = true;
940 break;
941 default:
942 break;
943 }
944 mutex_unlock(&phydev->lock);
945
946 /* if phy was suspended, bring the physical link up again */
947 if (do_resume)
948 phy_resume(phydev);
949
950 phy_trigger_machine(phydev, true);
951}
952EXPORT_SYMBOL(phy_start);
953
954static void phy_adjust_link(struct phy_device *phydev)
955{
956 phydev->adjust_link(phydev->attached_dev);
957 phy_led_trigger_change_speed(phydev);
958}
959
960/**
961 * phy_state_machine - Handle the state machine
962 * @work: work_struct that describes the work to be done
963 */
964void phy_state_machine(struct work_struct *work)
965{
966 struct delayed_work *dwork = to_delayed_work(work);
967 struct phy_device *phydev =
968 container_of(dwork, struct phy_device, state_queue);
969 bool needs_aneg = false, do_suspend = false;
970 enum phy_state old_state;
971 int err = 0;
972 int old_link;
973
974 mutex_lock(&phydev->lock);
975
976 old_state = phydev->state;
977
978 if (phydev->drv->link_change_notify)
979 phydev->drv->link_change_notify(phydev);
980
981 switch (phydev->state) {
982 case PHY_DOWN:
983 case PHY_STARTING:
984 case PHY_READY:
985 case PHY_PENDING:
986 break;
987 case PHY_UP:
988 needs_aneg = true;
989
990 phydev->link_timeout = PHY_AN_TIMEOUT;
991
992 break;
993 case PHY_AN:
994 err = phy_read_status(phydev);
995 if (err < 0)
996 break;
997
998 /* If the link is down, give up on negotiation for now */
999 if (!phydev->link) {
1000 phydev->state = PHY_NOLINK;
1001 netif_carrier_off(phydev->attached_dev);
1002 phy_adjust_link(phydev);
1003 break;
1004 }
1005
1006 /* Check if negotiation is done. Break if there's an error */
1007 err = phy_aneg_done(phydev);
1008 if (err < 0)
1009 break;
1010
1011 /* If AN is done, we're running */
1012 if (err > 0) {
1013 phydev->state = PHY_RUNNING;
1014 netif_carrier_on(phydev->attached_dev);
1015 phy_adjust_link(phydev);
1016
1017 } else if (0 == phydev->link_timeout--)
1018 needs_aneg = true;
1019 break;
1020 case PHY_NOLINK:
1021 if (phy_interrupt_is_valid(phydev))
1022 break;
1023
1024 err = phy_read_status(phydev);
1025 if (err)
1026 break;
1027
1028 if (phydev->link) {
1029 if (AUTONEG_ENABLE == phydev->autoneg) {
1030 err = phy_aneg_done(phydev);
1031 if (err < 0)
1032 break;
1033
1034 if (!err) {
1035 phydev->state = PHY_AN;
1036 phydev->link_timeout = PHY_AN_TIMEOUT;
1037 break;
1038 }
1039 }
1040 phydev->state = PHY_RUNNING;
1041 netif_carrier_on(phydev->attached_dev);
1042 phy_adjust_link(phydev);
1043 }
1044 break;
1045 case PHY_FORCING:
1046 err = genphy_update_link(phydev);
1047 if (err)
1048 break;
1049
1050 if (phydev->link) {
1051 phydev->state = PHY_RUNNING;
1052 netif_carrier_on(phydev->attached_dev);
1053 } else {
1054 if (0 == phydev->link_timeout--)
1055 needs_aneg = true;
1056 }
1057
1058 phy_adjust_link(phydev);
1059 break;
1060 case PHY_RUNNING:
1061 /* Only register a CHANGE if we are polling and link changed
1062 * since latest checking.
1063 */
1064 if (phydev->irq == PHY_POLL) {
1065 old_link = phydev->link;
1066 err = phy_read_status(phydev);
1067 if (err)
1068 break;
1069
1070 if (old_link != phydev->link)
1071 phydev->state = PHY_CHANGELINK;
1072 }
1073 /*
1074 * Failsafe: check that nobody set phydev->link=0 between two
1075 * poll cycles, otherwise we won't leave RUNNING state as long
1076 * as link remains down.
1077 */
1078 if (!phydev->link && phydev->state == PHY_RUNNING) {
1079 phydev->state = PHY_CHANGELINK;
1080 phydev_err(phydev, "no link in PHY_RUNNING\n");
1081 }
1082 break;
1083 case PHY_CHANGELINK:
1084 err = phy_read_status(phydev);
1085 if (err)
1086 break;
1087
1088 if (phydev->link) {
1089 phydev->state = PHY_RUNNING;
1090 netif_carrier_on(phydev->attached_dev);
1091 } else {
1092 phydev->state = PHY_NOLINK;
1093 netif_carrier_off(phydev->attached_dev);
1094 }
1095
1096 phy_adjust_link(phydev);
1097
1098 if (phy_interrupt_is_valid(phydev))
1099 err = phy_config_interrupt(phydev,
1100 PHY_INTERRUPT_ENABLED);
1101 break;
1102 case PHY_HALTED:
1103 if (phydev->link) {
1104 phydev->link = 0;
1105 netif_carrier_off(phydev->attached_dev);
1106 phy_adjust_link(phydev);
1107 do_suspend = true;
1108 }
1109 break;
1110 case PHY_RESUMING:
1111 if (AUTONEG_ENABLE == phydev->autoneg) {
1112 err = phy_aneg_done(phydev);
1113 if (err < 0)
1114 break;
1115
1116 /* err > 0 if AN is done.
1117 * Otherwise, it's 0, and we're still waiting for AN
1118 */
1119 if (err > 0) {
1120 err = phy_read_status(phydev);
1121 if (err)
1122 break;
1123
1124 if (phydev->link) {
1125 phydev->state = PHY_RUNNING;
1126 netif_carrier_on(phydev->attached_dev);
1127 } else {
1128 phydev->state = PHY_NOLINK;
1129 }
1130 phy_adjust_link(phydev);
1131 } else {
1132 phydev->state = PHY_AN;
1133 phydev->link_timeout = PHY_AN_TIMEOUT;
1134 }
1135 } else {
1136 err = phy_read_status(phydev);
1137 if (err)
1138 break;
1139
1140 if (phydev->link) {
1141 phydev->state = PHY_RUNNING;
1142 netif_carrier_on(phydev->attached_dev);
1143 } else {
1144 phydev->state = PHY_NOLINK;
1145 }
1146 phy_adjust_link(phydev);
1147 }
1148 break;
1149 }
1150
1151 mutex_unlock(&phydev->lock);
1152
1153 if (needs_aneg)
1154 err = phy_start_aneg(phydev);
1155 else if (do_suspend)
1156 phy_suspend(phydev);
1157
1158 if (err < 0)
1159 phy_error(phydev);
1160
1161 phydev_dbg(phydev, "PHY state change %s -> %s\n",
1162 phy_state_to_str(old_state),
1163 phy_state_to_str(phydev->state));
1164
1165 /* Only re-schedule a PHY state machine change if we are polling the
1166 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
1167 * between states from phy_mac_interrupt()
1168 */
1169 if (phydev->irq == PHY_POLL)
1170 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
1171 PHY_STATE_TIME * HZ);
1172}
1173
1174/**
1175 * phy_mac_interrupt - MAC says the link has changed
1176 * @phydev: phy_device struct with changed link
1177 * @new_link: Link is Up/Down.
1178 *
1179 * Description: The MAC layer is able indicate there has been a change
1180 * in the PHY link status. Set the new link status, and trigger the
1181 * state machine, work a work queue.
1182 */
1183void phy_mac_interrupt(struct phy_device *phydev, int new_link)
1184{
1185 phydev->link = new_link;
1186
1187 /* Trigger a state machine change */
1188 queue_work(system_power_efficient_wq, &phydev->phy_queue);
1189}
1190EXPORT_SYMBOL(phy_mac_interrupt);
1191
1192static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
1193 int addr)
1194{
1195 /* Write the desired MMD Devad */
1196 bus->write(bus, addr, MII_MMD_CTRL, devad);
1197
1198 /* Write the desired MMD register address */
1199 bus->write(bus, addr, MII_MMD_DATA, prtad);
1200
1201 /* Select the Function : DATA with no post increment */
1202 bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
1203}
1204
1205/**
1206 * phy_read_mmd_indirect - reads data from the MMD registers
1207 * @phydev: The PHY device bus
1208 * @prtad: MMD Address
1209 * @devad: MMD DEVAD
1210 *
1211 * Description: it reads data from the MMD registers (clause 22 to access to
1212 * clause 45) of the specified phy address.
1213 * To read these register we have:
1214 * 1) Write reg 13 // DEVAD
1215 * 2) Write reg 14 // MMD Address
1216 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1217 * 3) Read reg 14 // Read MMD data
1218 */
1219int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad)
1220{
1221 struct phy_driver *phydrv = phydev->drv;
1222 int addr = phydev->mdio.addr;
1223 int value = -1;
1224
1225 if (!phydrv->read_mmd_indirect) {
1226 struct mii_bus *bus = phydev->mdio.bus;
1227
1228 mutex_lock(&bus->mdio_lock);
1229 mmd_phy_indirect(bus, prtad, devad, addr);
1230
1231 /* Read the content of the MMD's selected register */
1232 value = bus->read(bus, addr, MII_MMD_DATA);
1233 mutex_unlock(&bus->mdio_lock);
1234 } else {
1235 value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr);
1236 }
1237 return value;
1238}
1239EXPORT_SYMBOL(phy_read_mmd_indirect);
1240
1241/**
1242 * phy_write_mmd_indirect - writes data to the MMD registers
1243 * @phydev: The PHY device
1244 * @prtad: MMD Address
1245 * @devad: MMD DEVAD
1246 * @data: data to write in the MMD register
1247 *
1248 * Description: Write data from the MMD registers of the specified
1249 * phy address.
1250 * To write these register we have:
1251 * 1) Write reg 13 // DEVAD
1252 * 2) Write reg 14 // MMD Address
1253 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
1254 * 3) Write reg 14 // Write MMD data
1255 */
1256void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
1257 int devad, u32 data)
1258{
1259 struct phy_driver *phydrv = phydev->drv;
1260 int addr = phydev->mdio.addr;
1261
1262 if (!phydrv->write_mmd_indirect) {
1263 struct mii_bus *bus = phydev->mdio.bus;
1264
1265 mutex_lock(&bus->mdio_lock);
1266 mmd_phy_indirect(bus, prtad, devad, addr);
1267
1268 /* Write the data into MMD's selected register */
1269 bus->write(bus, addr, MII_MMD_DATA, data);
1270 mutex_unlock(&bus->mdio_lock);
1271 } else {
1272 phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data);
1273 }
1274}
1275EXPORT_SYMBOL(phy_write_mmd_indirect);
1276
1277/**
1278 * phy_init_eee - init and check the EEE feature
1279 * @phydev: target phy_device struct
1280 * @clk_stop_enable: PHY may stop the clock during LPI
1281 *
1282 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1283 * is supported by looking at the MMD registers 3.20 and 7.60/61
1284 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1285 * bit if required.
1286 */
1287int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1288{
1289 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1290 * Also EEE feature is active when core is operating with MII, GMII
1291 * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
1292 * should return an error if they do not support EEE.
1293 */
1294 if ((phydev->duplex == DUPLEX_FULL) &&
1295 ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
1296 (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
1297 phy_interface_is_rgmii(phydev) ||
1298 phy_is_internal(phydev))) {
1299 int eee_lp, eee_cap, eee_adv;
1300 u32 lp, cap, adv;
1301 int status;
1302
1303 /* Read phy status to properly get the right settings */
1304 status = phy_read_status(phydev);
1305 if (status)
1306 return status;
1307
1308 /* First check if the EEE ability is supported */
1309 eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1310 MDIO_MMD_PCS);
1311 if (eee_cap <= 0)
1312 goto eee_exit_err;
1313
1314 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1315 if (!cap)
1316 goto eee_exit_err;
1317
1318 /* Check which link settings negotiated and verify it in
1319 * the EEE advertising registers.
1320 */
1321 eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1322 MDIO_MMD_AN);
1323 if (eee_lp <= 0)
1324 goto eee_exit_err;
1325
1326 eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1327 MDIO_MMD_AN);
1328 if (eee_adv <= 0)
1329 goto eee_exit_err;
1330
1331 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1332 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1333 if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1334 goto eee_exit_err;
1335
1336 if (clk_stop_enable) {
1337 /* Configure the PHY to stop receiving xMII
1338 * clock while it is signaling LPI.
1339 */
1340 int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1,
1341 MDIO_MMD_PCS);
1342 if (val < 0)
1343 return val;
1344
1345 val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1346 phy_write_mmd_indirect(phydev, MDIO_CTRL1,
1347 MDIO_MMD_PCS, val);
1348 }
1349
1350 return 0; /* EEE supported */
1351 }
1352eee_exit_err:
1353 return -EPROTONOSUPPORT;
1354}
1355EXPORT_SYMBOL(phy_init_eee);
1356
1357/**
1358 * phy_get_eee_err - report the EEE wake error count
1359 * @phydev: target phy_device struct
1360 *
1361 * Description: it is to report the number of time where the PHY
1362 * failed to complete its normal wake sequence.
1363 */
1364int phy_get_eee_err(struct phy_device *phydev)
1365{
1366 return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, MDIO_MMD_PCS);
1367}
1368EXPORT_SYMBOL(phy_get_eee_err);
1369
1370/**
1371 * phy_ethtool_get_eee - get EEE supported and status
1372 * @phydev: target phy_device struct
1373 * @data: ethtool_eee data
1374 *
1375 * Description: it reportes the Supported/Advertisement/LP Advertisement
1376 * capabilities.
1377 */
1378int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1379{
1380 int val;
1381
1382 /* Get Supported EEE */
1383 val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, MDIO_MMD_PCS);
1384 if (val < 0)
1385 return val;
1386 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1387
1388 /* Get advertisement EEE */
1389 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
1390 if (val < 0)
1391 return val;
1392 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1393
1394 /* Get LP advertisement EEE */
1395 val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, MDIO_MMD_AN);
1396 if (val < 0)
1397 return val;
1398 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1399
1400 return 0;
1401}
1402EXPORT_SYMBOL(phy_ethtool_get_eee);
1403
1404/**
1405 * phy_ethtool_set_eee - set EEE supported and status
1406 * @phydev: target phy_device struct
1407 * @data: ethtool_eee data
1408 *
1409 * Description: it is to program the Advertisement EEE register.
1410 */
1411int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1412{
1413 int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1414
1415 /* Mask prohibited EEE modes */
1416 val &= ~phydev->eee_broken_modes;
1417
1418 phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
1419
1420 return 0;
1421}
1422EXPORT_SYMBOL(phy_ethtool_set_eee);
1423
1424int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1425{
1426 if (phydev->drv->set_wol)
1427 return phydev->drv->set_wol(phydev, wol);
1428
1429 return -EOPNOTSUPP;
1430}
1431EXPORT_SYMBOL(phy_ethtool_set_wol);
1432
1433void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1434{
1435 if (phydev->drv->get_wol)
1436 phydev->drv->get_wol(phydev, wol);
1437}
1438EXPORT_SYMBOL(phy_ethtool_get_wol);
1439
1440int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1441 struct ethtool_link_ksettings *cmd)
1442{
1443 struct phy_device *phydev = ndev->phydev;
1444
1445 if (!phydev)
1446 return -ENODEV;
1447
1448 return phy_ethtool_ksettings_get(phydev, cmd);
1449}
1450EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1451
1452int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1453 const struct ethtool_link_ksettings *cmd)
1454{
1455 struct phy_device *phydev = ndev->phydev;
1456
1457 if (!phydev)
1458 return -ENODEV;
1459
1460 return phy_ethtool_ksettings_set(phydev, cmd);
1461}
1462EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1463
1464int phy_ethtool_nway_reset(struct net_device *ndev)
1465{
1466 struct phy_device *phydev = ndev->phydev;
1467
1468 if (!phydev)
1469 return -ENODEV;
1470
1471 return genphy_restart_aneg(phydev);
1472}
1473EXPORT_SYMBOL(phy_ethtool_nway_reset);