Loading...
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/timer.h>
33#include <linux/workqueue.h>
34#include <linux/mdio.h>
35#include <linux/io.h>
36#include <linux/uaccess.h>
37#include <linux/atomic.h>
38
39#include <asm/irq.h>
40
41static const char *phy_speed_to_str(int speed)
42{
43 switch (speed) {
44 case SPEED_10:
45 return "10Mbps";
46 case SPEED_100:
47 return "100Mbps";
48 case SPEED_1000:
49 return "1Gbps";
50 case SPEED_2500:
51 return "2.5Gbps";
52 case SPEED_10000:
53 return "10Gbps";
54 case SPEED_UNKNOWN:
55 return "Unknown";
56 default:
57 return "Unsupported (update phy.c)";
58 }
59}
60
61/**
62 * phy_print_status - Convenience function to print out the current phy status
63 * @phydev: the phy_device struct
64 */
65void phy_print_status(struct phy_device *phydev)
66{
67 if (phydev->link) {
68 netdev_info(phydev->attached_dev,
69 "Link is Up - %s/%s - flow control %s\n",
70 phy_speed_to_str(phydev->speed),
71 DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
72 phydev->pause ? "rx/tx" : "off");
73 } else {
74 netdev_info(phydev->attached_dev, "Link is Down\n");
75 }
76}
77EXPORT_SYMBOL(phy_print_status);
78
79/**
80 * phy_clear_interrupt - Ack the phy device's interrupt
81 * @phydev: the phy_device struct
82 *
83 * If the @phydev driver has an ack_interrupt function, call it to
84 * ack and clear the phy device's interrupt.
85 *
86 * Returns 0 on success or < 0 on error.
87 */
88static int phy_clear_interrupt(struct phy_device *phydev)
89{
90 if (phydev->drv->ack_interrupt)
91 return phydev->drv->ack_interrupt(phydev);
92
93 return 0;
94}
95
96/**
97 * phy_config_interrupt - configure the PHY device for the requested interrupts
98 * @phydev: the phy_device struct
99 * @interrupts: interrupt flags to configure for this @phydev
100 *
101 * Returns 0 on success or < 0 on error.
102 */
103static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
104{
105 phydev->interrupts = interrupts;
106 if (phydev->drv->config_intr)
107 return phydev->drv->config_intr(phydev);
108
109 return 0;
110}
111
112
113/**
114 * phy_aneg_done - return auto-negotiation status
115 * @phydev: target phy_device struct
116 *
117 * Description: Return the auto-negotiation status from this @phydev
118 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
119 * is still pending.
120 */
121static inline int phy_aneg_done(struct phy_device *phydev)
122{
123 if (phydev->drv->aneg_done)
124 return phydev->drv->aneg_done(phydev);
125
126 return genphy_aneg_done(phydev);
127}
128
129/* A structure for mapping a particular speed and duplex
130 * combination to a particular SUPPORTED and ADVERTISED value
131 */
132struct phy_setting {
133 int speed;
134 int duplex;
135 u32 setting;
136};
137
138/* A mapping of all SUPPORTED settings to speed/duplex */
139static const struct phy_setting settings[] = {
140 {
141 .speed = 10000,
142 .duplex = DUPLEX_FULL,
143 .setting = SUPPORTED_10000baseT_Full,
144 },
145 {
146 .speed = SPEED_1000,
147 .duplex = DUPLEX_FULL,
148 .setting = SUPPORTED_1000baseT_Full,
149 },
150 {
151 .speed = SPEED_1000,
152 .duplex = DUPLEX_HALF,
153 .setting = SUPPORTED_1000baseT_Half,
154 },
155 {
156 .speed = SPEED_100,
157 .duplex = DUPLEX_FULL,
158 .setting = SUPPORTED_100baseT_Full,
159 },
160 {
161 .speed = SPEED_100,
162 .duplex = DUPLEX_HALF,
163 .setting = SUPPORTED_100baseT_Half,
164 },
165 {
166 .speed = SPEED_10,
167 .duplex = DUPLEX_FULL,
168 .setting = SUPPORTED_10baseT_Full,
169 },
170 {
171 .speed = SPEED_10,
172 .duplex = DUPLEX_HALF,
173 .setting = SUPPORTED_10baseT_Half,
174 },
175};
176
177#define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
178
179/**
180 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
181 * @speed: speed to match
182 * @duplex: duplex to match
183 *
184 * Description: Searches the settings array for the setting which
185 * matches the desired speed and duplex, and returns the index
186 * of that setting. Returns the index of the last setting if
187 * none of the others match.
188 */
189static inline unsigned int phy_find_setting(int speed, int duplex)
190{
191 unsigned int idx = 0;
192
193 while (idx < ARRAY_SIZE(settings) &&
194 (settings[idx].speed != speed || settings[idx].duplex != duplex))
195 idx++;
196
197 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
198}
199
200/**
201 * phy_find_valid - find a PHY setting that matches the requested features mask
202 * @idx: The first index in settings[] to search
203 * @features: A mask of the valid settings
204 *
205 * Description: Returns the index of the first valid setting less
206 * than or equal to the one pointed to by idx, as determined by
207 * the mask in features. Returns the index of the last setting
208 * if nothing else matches.
209 */
210static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
211{
212 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
213 idx++;
214
215 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
216}
217
218/**
219 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
220 * @phydev: the target phy_device struct
221 *
222 * Description: Make sure the PHY is set to supported speeds and
223 * duplexes. Drop down by one in this order: 1000/FULL,
224 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
225 */
226static void phy_sanitize_settings(struct phy_device *phydev)
227{
228 u32 features = phydev->supported;
229 unsigned int idx;
230
231 /* Sanitize settings based on PHY capabilities */
232 if ((features & SUPPORTED_Autoneg) == 0)
233 phydev->autoneg = AUTONEG_DISABLE;
234
235 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
236 features);
237
238 phydev->speed = settings[idx].speed;
239 phydev->duplex = settings[idx].duplex;
240}
241
242/**
243 * phy_ethtool_sset - generic ethtool sset function, handles all the details
244 * @phydev: target phy_device struct
245 * @cmd: ethtool_cmd
246 *
247 * A few notes about parameter checking:
248 * - We don't set port or transceiver, so we don't care what they
249 * were set to.
250 * - phy_start_aneg() will make sure forced settings are sane, and
251 * choose the next best ones from the ones selected, so we don't
252 * care if ethtool tries to give us bad values.
253 */
254int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
255{
256 u32 speed = ethtool_cmd_speed(cmd);
257
258 if (cmd->phy_address != phydev->addr)
259 return -EINVAL;
260
261 /* We make sure that we don't pass unsupported values in to the PHY */
262 cmd->advertising &= phydev->supported;
263
264 /* Verify the settings we care about. */
265 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
266 return -EINVAL;
267
268 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
269 return -EINVAL;
270
271 if (cmd->autoneg == AUTONEG_DISABLE &&
272 ((speed != SPEED_1000 &&
273 speed != SPEED_100 &&
274 speed != SPEED_10) ||
275 (cmd->duplex != DUPLEX_HALF &&
276 cmd->duplex != DUPLEX_FULL)))
277 return -EINVAL;
278
279 phydev->autoneg = cmd->autoneg;
280
281 phydev->speed = speed;
282
283 phydev->advertising = cmd->advertising;
284
285 if (AUTONEG_ENABLE == cmd->autoneg)
286 phydev->advertising |= ADVERTISED_Autoneg;
287 else
288 phydev->advertising &= ~ADVERTISED_Autoneg;
289
290 phydev->duplex = cmd->duplex;
291
292 /* Restart the PHY */
293 phy_start_aneg(phydev);
294
295 return 0;
296}
297EXPORT_SYMBOL(phy_ethtool_sset);
298
299int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
300{
301 cmd->supported = phydev->supported;
302
303 cmd->advertising = phydev->advertising;
304 cmd->lp_advertising = phydev->lp_advertising;
305
306 ethtool_cmd_speed_set(cmd, phydev->speed);
307 cmd->duplex = phydev->duplex;
308 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
309 cmd->port = PORT_BNC;
310 else
311 cmd->port = PORT_MII;
312 cmd->phy_address = phydev->addr;
313 cmd->transceiver = phy_is_internal(phydev) ?
314 XCVR_INTERNAL : XCVR_EXTERNAL;
315 cmd->autoneg = phydev->autoneg;
316
317 return 0;
318}
319EXPORT_SYMBOL(phy_ethtool_gset);
320
321/**
322 * phy_mii_ioctl - generic PHY MII ioctl interface
323 * @phydev: the phy_device struct
324 * @ifr: &struct ifreq for socket ioctl's
325 * @cmd: ioctl cmd to execute
326 *
327 * Note that this function is currently incompatible with the
328 * PHYCONTROL layer. It changes registers without regard to
329 * current state. Use at own risk.
330 */
331int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
332{
333 struct mii_ioctl_data *mii_data = if_mii(ifr);
334 u16 val = mii_data->val_in;
335
336 switch (cmd) {
337 case SIOCGMIIPHY:
338 mii_data->phy_id = phydev->addr;
339 /* fall through */
340
341 case SIOCGMIIREG:
342 mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id,
343 mii_data->reg_num);
344 return 0;
345
346 case SIOCSMIIREG:
347 if (mii_data->phy_id == phydev->addr) {
348 switch (mii_data->reg_num) {
349 case MII_BMCR:
350 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0)
351 phydev->autoneg = AUTONEG_DISABLE;
352 else
353 phydev->autoneg = AUTONEG_ENABLE;
354 if (!phydev->autoneg && (val & BMCR_FULLDPLX))
355 phydev->duplex = DUPLEX_FULL;
356 else
357 phydev->duplex = DUPLEX_HALF;
358 if (!phydev->autoneg && (val & BMCR_SPEED1000))
359 phydev->speed = SPEED_1000;
360 else if (!phydev->autoneg &&
361 (val & BMCR_SPEED100))
362 phydev->speed = SPEED_100;
363 break;
364 case MII_ADVERTISE:
365 phydev->advertising = val;
366 break;
367 default:
368 /* do nothing */
369 break;
370 }
371 }
372
373 mdiobus_write(phydev->bus, mii_data->phy_id,
374 mii_data->reg_num, val);
375
376 if (mii_data->reg_num == MII_BMCR &&
377 val & BMCR_RESET)
378 return phy_init_hw(phydev);
379 return 0;
380
381 case SIOCSHWTSTAMP:
382 if (phydev->drv->hwtstamp)
383 return phydev->drv->hwtstamp(phydev, ifr);
384 /* fall through */
385
386 default:
387 return -EOPNOTSUPP;
388 }
389}
390EXPORT_SYMBOL(phy_mii_ioctl);
391
392/**
393 * phy_start_aneg - start auto-negotiation for this PHY device
394 * @phydev: the phy_device struct
395 *
396 * Description: Sanitizes the settings (if we're not autonegotiating
397 * them), and then calls the driver's config_aneg function.
398 * If the PHYCONTROL Layer is operating, we change the state to
399 * reflect the beginning of Auto-negotiation or forcing.
400 */
401int phy_start_aneg(struct phy_device *phydev)
402{
403 int err;
404
405 mutex_lock(&phydev->lock);
406
407 if (AUTONEG_DISABLE == phydev->autoneg)
408 phy_sanitize_settings(phydev);
409
410 err = phydev->drv->config_aneg(phydev);
411 if (err < 0)
412 goto out_unlock;
413
414 if (phydev->state != PHY_HALTED) {
415 if (AUTONEG_ENABLE == phydev->autoneg) {
416 phydev->state = PHY_AN;
417 phydev->link_timeout = PHY_AN_TIMEOUT;
418 } else {
419 phydev->state = PHY_FORCING;
420 phydev->link_timeout = PHY_FORCE_TIMEOUT;
421 }
422 }
423
424out_unlock:
425 mutex_unlock(&phydev->lock);
426 return err;
427}
428EXPORT_SYMBOL(phy_start_aneg);
429
430/**
431 * phy_start_machine - start PHY state machine tracking
432 * @phydev: the phy_device struct
433 *
434 * Description: The PHY infrastructure can run a state machine
435 * which tracks whether the PHY is starting up, negotiating,
436 * etc. This function starts the timer which tracks the state
437 * of the PHY. If you want to maintain your own state machine,
438 * do not call this function.
439 */
440void phy_start_machine(struct phy_device *phydev)
441{
442 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
443}
444
445/**
446 * phy_stop_machine - stop the PHY state machine tracking
447 * @phydev: target phy_device struct
448 *
449 * Description: Stops the state machine timer, sets the state to UP
450 * (unless it wasn't up yet). This function must be called BEFORE
451 * phy_detach.
452 */
453void phy_stop_machine(struct phy_device *phydev)
454{
455 cancel_delayed_work_sync(&phydev->state_queue);
456
457 mutex_lock(&phydev->lock);
458 if (phydev->state > PHY_UP)
459 phydev->state = PHY_UP;
460 mutex_unlock(&phydev->lock);
461}
462
463/**
464 * phy_error - enter HALTED state for this PHY device
465 * @phydev: target phy_device struct
466 *
467 * Moves the PHY to the HALTED state in response to a read
468 * or write error, and tells the controller the link is down.
469 * Must not be called from interrupt context, or while the
470 * phydev->lock is held.
471 */
472static void phy_error(struct phy_device *phydev)
473{
474 mutex_lock(&phydev->lock);
475 phydev->state = PHY_HALTED;
476 mutex_unlock(&phydev->lock);
477}
478
479/**
480 * phy_interrupt - PHY interrupt handler
481 * @irq: interrupt line
482 * @phy_dat: phy_device pointer
483 *
484 * Description: When a PHY interrupt occurs, the handler disables
485 * interrupts, and schedules a work task to clear the interrupt.
486 */
487static irqreturn_t phy_interrupt(int irq, void *phy_dat)
488{
489 struct phy_device *phydev = phy_dat;
490
491 if (PHY_HALTED == phydev->state)
492 return IRQ_NONE; /* It can't be ours. */
493
494 /* The MDIO bus is not allowed to be written in interrupt
495 * context, so we need to disable the irq here. A work
496 * queue will write the PHY to disable and clear the
497 * interrupt, and then reenable the irq line.
498 */
499 disable_irq_nosync(irq);
500 atomic_inc(&phydev->irq_disable);
501
502 queue_work(system_power_efficient_wq, &phydev->phy_queue);
503
504 return IRQ_HANDLED;
505}
506
507/**
508 * phy_enable_interrupts - Enable the interrupts from the PHY side
509 * @phydev: target phy_device struct
510 */
511static int phy_enable_interrupts(struct phy_device *phydev)
512{
513 int err = phy_clear_interrupt(phydev);
514
515 if (err < 0)
516 return err;
517
518 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
519}
520
521/**
522 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
523 * @phydev: target phy_device struct
524 */
525static int phy_disable_interrupts(struct phy_device *phydev)
526{
527 int err;
528
529 /* Disable PHY interrupts */
530 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
531 if (err)
532 goto phy_err;
533
534 /* Clear the interrupt */
535 err = phy_clear_interrupt(phydev);
536 if (err)
537 goto phy_err;
538
539 return 0;
540
541phy_err:
542 phy_error(phydev);
543
544 return err;
545}
546
547/**
548 * phy_start_interrupts - request and enable interrupts for a PHY device
549 * @phydev: target phy_device struct
550 *
551 * Description: Request the interrupt for the given PHY.
552 * If this fails, then we set irq to PHY_POLL.
553 * Otherwise, we enable the interrupts in the PHY.
554 * This should only be called with a valid IRQ number.
555 * Returns 0 on success or < 0 on error.
556 */
557int phy_start_interrupts(struct phy_device *phydev)
558{
559 atomic_set(&phydev->irq_disable, 0);
560 if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt",
561 phydev) < 0) {
562 pr_warn("%s: Can't get IRQ %d (PHY)\n",
563 phydev->bus->name, phydev->irq);
564 phydev->irq = PHY_POLL;
565 return 0;
566 }
567
568 return phy_enable_interrupts(phydev);
569}
570EXPORT_SYMBOL(phy_start_interrupts);
571
572/**
573 * phy_stop_interrupts - disable interrupts from a PHY device
574 * @phydev: target phy_device struct
575 */
576int phy_stop_interrupts(struct phy_device *phydev)
577{
578 int err = phy_disable_interrupts(phydev);
579
580 if (err)
581 phy_error(phydev);
582
583 free_irq(phydev->irq, phydev);
584
585 /* Cannot call flush_scheduled_work() here as desired because
586 * of rtnl_lock(), but we do not really care about what would
587 * be done, except from enable_irq(), so cancel any work
588 * possibly pending and take care of the matter below.
589 */
590 cancel_work_sync(&phydev->phy_queue);
591 /* If work indeed has been cancelled, disable_irq() will have
592 * been left unbalanced from phy_interrupt() and enable_irq()
593 * has to be called so that other devices on the line work.
594 */
595 while (atomic_dec_return(&phydev->irq_disable) >= 0)
596 enable_irq(phydev->irq);
597
598 return err;
599}
600EXPORT_SYMBOL(phy_stop_interrupts);
601
602/**
603 * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes
604 * @work: work_struct that describes the work to be done
605 */
606void phy_change(struct work_struct *work)
607{
608 struct phy_device *phydev =
609 container_of(work, struct phy_device, phy_queue);
610
611 if (phydev->drv->did_interrupt &&
612 !phydev->drv->did_interrupt(phydev))
613 goto ignore;
614
615 if (phy_disable_interrupts(phydev))
616 goto phy_err;
617
618 mutex_lock(&phydev->lock);
619 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
620 phydev->state = PHY_CHANGELINK;
621 mutex_unlock(&phydev->lock);
622
623 atomic_dec(&phydev->irq_disable);
624 enable_irq(phydev->irq);
625
626 /* Reenable interrupts */
627 if (PHY_HALTED != phydev->state &&
628 phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
629 goto irq_enable_err;
630
631 /* reschedule state queue work to run as soon as possible */
632 cancel_delayed_work_sync(&phydev->state_queue);
633 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
634 return;
635
636ignore:
637 atomic_dec(&phydev->irq_disable);
638 enable_irq(phydev->irq);
639 return;
640
641irq_enable_err:
642 disable_irq(phydev->irq);
643 atomic_inc(&phydev->irq_disable);
644phy_err:
645 phy_error(phydev);
646}
647
648/**
649 * phy_stop - Bring down the PHY link, and stop checking the status
650 * @phydev: target phy_device struct
651 */
652void phy_stop(struct phy_device *phydev)
653{
654 mutex_lock(&phydev->lock);
655
656 if (PHY_HALTED == phydev->state)
657 goto out_unlock;
658
659 if (phy_interrupt_is_valid(phydev)) {
660 /* Disable PHY Interrupts */
661 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
662
663 /* Clear any pending interrupts */
664 phy_clear_interrupt(phydev);
665 }
666
667 phydev->state = PHY_HALTED;
668
669out_unlock:
670 mutex_unlock(&phydev->lock);
671
672 /* Cannot call flush_scheduled_work() here as desired because
673 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
674 * will not reenable interrupts.
675 */
676}
677EXPORT_SYMBOL(phy_stop);
678
679/**
680 * phy_start - start or restart a PHY device
681 * @phydev: target phy_device struct
682 *
683 * Description: Indicates the attached device's readiness to
684 * handle PHY-related work. Used during startup to start the
685 * PHY, and after a call to phy_stop() to resume operation.
686 * Also used to indicate the MDIO bus has cleared an error
687 * condition.
688 */
689void phy_start(struct phy_device *phydev)
690{
691 mutex_lock(&phydev->lock);
692
693 switch (phydev->state) {
694 case PHY_STARTING:
695 phydev->state = PHY_PENDING;
696 break;
697 case PHY_READY:
698 phydev->state = PHY_UP;
699 break;
700 case PHY_HALTED:
701 phydev->state = PHY_RESUMING;
702 default:
703 break;
704 }
705 mutex_unlock(&phydev->lock);
706}
707EXPORT_SYMBOL(phy_start);
708
709/**
710 * phy_state_machine - Handle the state machine
711 * @work: work_struct that describes the work to be done
712 */
713void phy_state_machine(struct work_struct *work)
714{
715 struct delayed_work *dwork = to_delayed_work(work);
716 struct phy_device *phydev =
717 container_of(dwork, struct phy_device, state_queue);
718 bool needs_aneg = false, do_suspend = false, do_resume = false;
719 int err = 0;
720
721 mutex_lock(&phydev->lock);
722
723 switch (phydev->state) {
724 case PHY_DOWN:
725 case PHY_STARTING:
726 case PHY_READY:
727 case PHY_PENDING:
728 break;
729 case PHY_UP:
730 needs_aneg = true;
731
732 phydev->link_timeout = PHY_AN_TIMEOUT;
733
734 break;
735 case PHY_AN:
736 err = phy_read_status(phydev);
737 if (err < 0)
738 break;
739
740 /* If the link is down, give up on negotiation for now */
741 if (!phydev->link) {
742 phydev->state = PHY_NOLINK;
743 netif_carrier_off(phydev->attached_dev);
744 phydev->adjust_link(phydev->attached_dev);
745 break;
746 }
747
748 /* Check if negotiation is done. Break if there's an error */
749 err = phy_aneg_done(phydev);
750 if (err < 0)
751 break;
752
753 /* If AN is done, we're running */
754 if (err > 0) {
755 phydev->state = PHY_RUNNING;
756 netif_carrier_on(phydev->attached_dev);
757 phydev->adjust_link(phydev->attached_dev);
758
759 } else if (0 == phydev->link_timeout--)
760 needs_aneg = true;
761 break;
762 case PHY_NOLINK:
763 err = phy_read_status(phydev);
764 if (err)
765 break;
766
767 if (phydev->link) {
768 if (AUTONEG_ENABLE == phydev->autoneg) {
769 err = phy_aneg_done(phydev);
770 if (err < 0)
771 break;
772
773 if (!err) {
774 phydev->state = PHY_AN;
775 phydev->link_timeout = PHY_AN_TIMEOUT;
776 break;
777 }
778 }
779 phydev->state = PHY_RUNNING;
780 netif_carrier_on(phydev->attached_dev);
781 phydev->adjust_link(phydev->attached_dev);
782 }
783 break;
784 case PHY_FORCING:
785 err = genphy_update_link(phydev);
786 if (err)
787 break;
788
789 if (phydev->link) {
790 phydev->state = PHY_RUNNING;
791 netif_carrier_on(phydev->attached_dev);
792 } else {
793 if (0 == phydev->link_timeout--)
794 needs_aneg = true;
795 }
796
797 phydev->adjust_link(phydev->attached_dev);
798 break;
799 case PHY_RUNNING:
800 /* Only register a CHANGE if we are
801 * polling or ignoring interrupts
802 */
803 if (!phy_interrupt_is_valid(phydev))
804 phydev->state = PHY_CHANGELINK;
805 break;
806 case PHY_CHANGELINK:
807 err = phy_read_status(phydev);
808 if (err)
809 break;
810
811 if (phydev->link) {
812 phydev->state = PHY_RUNNING;
813 netif_carrier_on(phydev->attached_dev);
814 } else {
815 phydev->state = PHY_NOLINK;
816 netif_carrier_off(phydev->attached_dev);
817 }
818
819 phydev->adjust_link(phydev->attached_dev);
820
821 if (phy_interrupt_is_valid(phydev))
822 err = phy_config_interrupt(phydev,
823 PHY_INTERRUPT_ENABLED);
824 break;
825 case PHY_HALTED:
826 if (phydev->link) {
827 phydev->link = 0;
828 netif_carrier_off(phydev->attached_dev);
829 phydev->adjust_link(phydev->attached_dev);
830 do_suspend = true;
831 }
832 break;
833 case PHY_RESUMING:
834 err = phy_clear_interrupt(phydev);
835 if (err)
836 break;
837
838 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
839 if (err)
840 break;
841
842 if (AUTONEG_ENABLE == phydev->autoneg) {
843 err = phy_aneg_done(phydev);
844 if (err < 0)
845 break;
846
847 /* err > 0 if AN is done.
848 * Otherwise, it's 0, and we're still waiting for AN
849 */
850 if (err > 0) {
851 err = phy_read_status(phydev);
852 if (err)
853 break;
854
855 if (phydev->link) {
856 phydev->state = PHY_RUNNING;
857 netif_carrier_on(phydev->attached_dev);
858 } else {
859 phydev->state = PHY_NOLINK;
860 }
861 phydev->adjust_link(phydev->attached_dev);
862 } else {
863 phydev->state = PHY_AN;
864 phydev->link_timeout = PHY_AN_TIMEOUT;
865 }
866 } else {
867 err = phy_read_status(phydev);
868 if (err)
869 break;
870
871 if (phydev->link) {
872 phydev->state = PHY_RUNNING;
873 netif_carrier_on(phydev->attached_dev);
874 } else {
875 phydev->state = PHY_NOLINK;
876 }
877 phydev->adjust_link(phydev->attached_dev);
878 }
879 do_resume = true;
880 break;
881 }
882
883 mutex_unlock(&phydev->lock);
884
885 if (needs_aneg)
886 err = phy_start_aneg(phydev);
887 else if (do_suspend)
888 phy_suspend(phydev);
889 else if (do_resume)
890 phy_resume(phydev);
891
892 if (err < 0)
893 phy_error(phydev);
894
895 queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
896 PHY_STATE_TIME * HZ);
897}
898
899void phy_mac_interrupt(struct phy_device *phydev, int new_link)
900{
901 cancel_work_sync(&phydev->phy_queue);
902 phydev->link = new_link;
903 schedule_work(&phydev->phy_queue);
904}
905EXPORT_SYMBOL(phy_mac_interrupt);
906
907static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
908 int addr)
909{
910 /* Write the desired MMD Devad */
911 bus->write(bus, addr, MII_MMD_CTRL, devad);
912
913 /* Write the desired MMD register address */
914 bus->write(bus, addr, MII_MMD_DATA, prtad);
915
916 /* Select the Function : DATA with no post increment */
917 bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
918}
919
920/**
921 * phy_read_mmd_indirect - reads data from the MMD registers
922 * @bus: the target MII bus
923 * @prtad: MMD Address
924 * @devad: MMD DEVAD
925 * @addr: PHY address on the MII bus
926 *
927 * Description: it reads data from the MMD registers (clause 22 to access to
928 * clause 45) of the specified phy address.
929 * To read these register we have:
930 * 1) Write reg 13 // DEVAD
931 * 2) Write reg 14 // MMD Address
932 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
933 * 3) Read reg 14 // Read MMD data
934 */
935static int phy_read_mmd_indirect(struct mii_bus *bus, int prtad, int devad,
936 int addr)
937{
938 mmd_phy_indirect(bus, prtad, devad, addr);
939
940 /* Read the content of the MMD's selected register */
941 return bus->read(bus, addr, MII_MMD_DATA);
942}
943
944/**
945 * phy_write_mmd_indirect - writes data to the MMD registers
946 * @bus: the target MII bus
947 * @prtad: MMD Address
948 * @devad: MMD DEVAD
949 * @addr: PHY address on the MII bus
950 * @data: data to write in the MMD register
951 *
952 * Description: Write data from the MMD registers of the specified
953 * phy address.
954 * To write these register we have:
955 * 1) Write reg 13 // DEVAD
956 * 2) Write reg 14 // MMD Address
957 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
958 * 3) Write reg 14 // Write MMD data
959 */
960static void phy_write_mmd_indirect(struct mii_bus *bus, int prtad, int devad,
961 int addr, u32 data)
962{
963 mmd_phy_indirect(bus, prtad, devad, addr);
964
965 /* Write the data into MMD's selected register */
966 bus->write(bus, addr, MII_MMD_DATA, data);
967}
968
969/**
970 * phy_init_eee - init and check the EEE feature
971 * @phydev: target phy_device struct
972 * @clk_stop_enable: PHY may stop the clock during LPI
973 *
974 * Description: it checks if the Energy-Efficient Ethernet (EEE)
975 * is supported by looking at the MMD registers 3.20 and 7.60/61
976 * and it programs the MMD register 3.0 setting the "Clock stop enable"
977 * bit if required.
978 */
979int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
980{
981 /* According to 802.3az,the EEE is supported only in full duplex-mode.
982 * Also EEE feature is active when core is operating with MII, GMII
983 * or RGMII.
984 */
985 if ((phydev->duplex == DUPLEX_FULL) &&
986 ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
987 (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
988 (phydev->interface == PHY_INTERFACE_MODE_RGMII))) {
989 int eee_lp, eee_cap, eee_adv;
990 u32 lp, cap, adv;
991 int status;
992 unsigned int idx;
993
994 /* Read phy status to properly get the right settings */
995 status = phy_read_status(phydev);
996 if (status)
997 return status;
998
999 /* First check if the EEE ability is supported */
1000 eee_cap = phy_read_mmd_indirect(phydev->bus, MDIO_PCS_EEE_ABLE,
1001 MDIO_MMD_PCS, phydev->addr);
1002 if (eee_cap < 0)
1003 return eee_cap;
1004
1005 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1006 if (!cap)
1007 return -EPROTONOSUPPORT;
1008
1009 /* Check which link settings negotiated and verify it in
1010 * the EEE advertising registers.
1011 */
1012 eee_lp = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_LPABLE,
1013 MDIO_MMD_AN, phydev->addr);
1014 if (eee_lp < 0)
1015 return eee_lp;
1016
1017 eee_adv = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV,
1018 MDIO_MMD_AN, phydev->addr);
1019 if (eee_adv < 0)
1020 return eee_adv;
1021
1022 adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
1023 lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1024 idx = phy_find_setting(phydev->speed, phydev->duplex);
1025 if (!(lp & adv & settings[idx].setting))
1026 return -EPROTONOSUPPORT;
1027
1028 if (clk_stop_enable) {
1029 /* Configure the PHY to stop receiving xMII
1030 * clock while it is signaling LPI.
1031 */
1032 int val = phy_read_mmd_indirect(phydev->bus, MDIO_CTRL1,
1033 MDIO_MMD_PCS,
1034 phydev->addr);
1035 if (val < 0)
1036 return val;
1037
1038 val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1039 phy_write_mmd_indirect(phydev->bus, MDIO_CTRL1,
1040 MDIO_MMD_PCS, phydev->addr, val);
1041 }
1042
1043 return 0; /* EEE supported */
1044 }
1045
1046 return -EPROTONOSUPPORT;
1047}
1048EXPORT_SYMBOL(phy_init_eee);
1049
1050/**
1051 * phy_get_eee_err - report the EEE wake error count
1052 * @phydev: target phy_device struct
1053 *
1054 * Description: it is to report the number of time where the PHY
1055 * failed to complete its normal wake sequence.
1056 */
1057int phy_get_eee_err(struct phy_device *phydev)
1058{
1059 return phy_read_mmd_indirect(phydev->bus, MDIO_PCS_EEE_WK_ERR,
1060 MDIO_MMD_PCS, phydev->addr);
1061}
1062EXPORT_SYMBOL(phy_get_eee_err);
1063
1064/**
1065 * phy_ethtool_get_eee - get EEE supported and status
1066 * @phydev: target phy_device struct
1067 * @data: ethtool_eee data
1068 *
1069 * Description: it reportes the Supported/Advertisement/LP Advertisement
1070 * capabilities.
1071 */
1072int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1073{
1074 int val;
1075
1076 /* Get Supported EEE */
1077 val = phy_read_mmd_indirect(phydev->bus, MDIO_PCS_EEE_ABLE,
1078 MDIO_MMD_PCS, phydev->addr);
1079 if (val < 0)
1080 return val;
1081 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1082
1083 /* Get advertisement EEE */
1084 val = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV,
1085 MDIO_MMD_AN, phydev->addr);
1086 if (val < 0)
1087 return val;
1088 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1089
1090 /* Get LP advertisement EEE */
1091 val = phy_read_mmd_indirect(phydev->bus, MDIO_AN_EEE_LPABLE,
1092 MDIO_MMD_AN, phydev->addr);
1093 if (val < 0)
1094 return val;
1095 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1096
1097 return 0;
1098}
1099EXPORT_SYMBOL(phy_ethtool_get_eee);
1100
1101/**
1102 * phy_ethtool_set_eee - set EEE supported and status
1103 * @phydev: target phy_device struct
1104 * @data: ethtool_eee data
1105 *
1106 * Description: it is to program the Advertisement EEE register.
1107 */
1108int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1109{
1110 int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1111
1112 phy_write_mmd_indirect(phydev->bus, MDIO_AN_EEE_ADV, MDIO_MMD_AN,
1113 phydev->addr, val);
1114
1115 return 0;
1116}
1117EXPORT_SYMBOL(phy_ethtool_set_eee);
1118
1119int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1120{
1121 if (phydev->drv->set_wol)
1122 return phydev->drv->set_wol(phydev, wol);
1123
1124 return -EOPNOTSUPP;
1125}
1126EXPORT_SYMBOL(phy_ethtool_set_wol);
1127
1128void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1129{
1130 if (phydev->drv->get_wol)
1131 phydev->drv->get_wol(phydev, wol);
1132}
1133EXPORT_SYMBOL(phy_ethtool_get_wol);
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/etherdevice.h>
19#include <linux/skbuff.h>
20#include <linux/mm.h>
21#include <linux/module.h>
22#include <linux/mii.h>
23#include <linux/ethtool.h>
24#include <linux/phy.h>
25#include <linux/phy_led_triggers.h>
26#include <linux/workqueue.h>
27#include <linux/mdio.h>
28#include <linux/io.h>
29#include <linux/uaccess.h>
30#include <linux/atomic.h>
31
32#define PHY_STATE_TIME HZ
33
34#define PHY_STATE_STR(_state) \
35 case PHY_##_state: \
36 return __stringify(_state); \
37
38static const char *phy_state_to_str(enum phy_state st)
39{
40 switch (st) {
41 PHY_STATE_STR(DOWN)
42 PHY_STATE_STR(READY)
43 PHY_STATE_STR(UP)
44 PHY_STATE_STR(RUNNING)
45 PHY_STATE_STR(NOLINK)
46 PHY_STATE_STR(HALTED)
47 }
48
49 return NULL;
50}
51
52static void phy_link_up(struct phy_device *phydev)
53{
54 phydev->phy_link_change(phydev, true, true);
55 phy_led_trigger_change_speed(phydev);
56}
57
58static void phy_link_down(struct phy_device *phydev, bool do_carrier)
59{
60 phydev->phy_link_change(phydev, false, do_carrier);
61 phy_led_trigger_change_speed(phydev);
62}
63
64static const char *phy_pause_str(struct phy_device *phydev)
65{
66 bool local_pause, local_asym_pause;
67
68 if (phydev->autoneg == AUTONEG_DISABLE)
69 goto no_pause;
70
71 local_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
72 phydev->advertising);
73 local_asym_pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
74 phydev->advertising);
75
76 if (local_pause && phydev->pause)
77 return "rx/tx";
78
79 if (local_asym_pause && phydev->asym_pause) {
80 if (local_pause)
81 return "rx";
82 if (phydev->pause)
83 return "tx";
84 }
85
86no_pause:
87 return "off";
88}
89
90/**
91 * phy_print_status - Convenience function to print out the current phy status
92 * @phydev: the phy_device struct
93 */
94void phy_print_status(struct phy_device *phydev)
95{
96 if (phydev->link) {
97 netdev_info(phydev->attached_dev,
98 "Link is Up - %s/%s - flow control %s\n",
99 phy_speed_to_str(phydev->speed),
100 phy_duplex_to_str(phydev->duplex),
101 phy_pause_str(phydev));
102 } else {
103 netdev_info(phydev->attached_dev, "Link is Down\n");
104 }
105}
106EXPORT_SYMBOL(phy_print_status);
107
108/**
109 * phy_clear_interrupt - Ack the phy device's interrupt
110 * @phydev: the phy_device struct
111 *
112 * If the @phydev driver has an ack_interrupt function, call it to
113 * ack and clear the phy device's interrupt.
114 *
115 * Returns 0 on success or < 0 on error.
116 */
117static int phy_clear_interrupt(struct phy_device *phydev)
118{
119 if (phydev->drv->ack_interrupt)
120 return phydev->drv->ack_interrupt(phydev);
121
122 return 0;
123}
124
125/**
126 * phy_config_interrupt - configure the PHY device for the requested interrupts
127 * @phydev: the phy_device struct
128 * @interrupts: interrupt flags to configure for this @phydev
129 *
130 * Returns 0 on success or < 0 on error.
131 */
132static int phy_config_interrupt(struct phy_device *phydev, bool interrupts)
133{
134 phydev->interrupts = interrupts ? 1 : 0;
135 if (phydev->drv->config_intr)
136 return phydev->drv->config_intr(phydev);
137
138 return 0;
139}
140
141/**
142 * phy_restart_aneg - restart auto-negotiation
143 * @phydev: target phy_device struct
144 *
145 * Restart the autonegotiation on @phydev. Returns >= 0 on success or
146 * negative errno on error.
147 */
148int phy_restart_aneg(struct phy_device *phydev)
149{
150 int ret;
151
152 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
153 ret = genphy_c45_restart_aneg(phydev);
154 else
155 ret = genphy_restart_aneg(phydev);
156
157 return ret;
158}
159EXPORT_SYMBOL_GPL(phy_restart_aneg);
160
161/**
162 * phy_aneg_done - return auto-negotiation status
163 * @phydev: target phy_device struct
164 *
165 * Description: Return the auto-negotiation status from this @phydev
166 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
167 * is still pending.
168 */
169int phy_aneg_done(struct phy_device *phydev)
170{
171 if (phydev->drv && phydev->drv->aneg_done)
172 return phydev->drv->aneg_done(phydev);
173 else if (phydev->is_c45)
174 return genphy_c45_aneg_done(phydev);
175 else
176 return genphy_aneg_done(phydev);
177}
178EXPORT_SYMBOL(phy_aneg_done);
179
180/**
181 * phy_find_valid - find a PHY setting that matches the requested parameters
182 * @speed: desired speed
183 * @duplex: desired duplex
184 * @supported: mask of supported link modes
185 *
186 * Locate a supported phy setting that is, in priority order:
187 * - an exact match for the specified speed and duplex mode
188 * - a match for the specified speed, or slower speed
189 * - the slowest supported speed
190 * Returns the matched phy_setting entry, or %NULL if no supported phy
191 * settings were found.
192 */
193static const struct phy_setting *
194phy_find_valid(int speed, int duplex, unsigned long *supported)
195{
196 return phy_lookup_setting(speed, duplex, supported, false);
197}
198
199/**
200 * phy_supported_speeds - return all speeds currently supported by a phy device
201 * @phy: The phy device to return supported speeds of.
202 * @speeds: buffer to store supported speeds in.
203 * @size: size of speeds buffer.
204 *
205 * Description: Returns the number of supported speeds, and fills the speeds
206 * buffer with the supported speeds. If speeds buffer is too small to contain
207 * all currently supported speeds, will return as many speeds as can fit.
208 */
209unsigned int phy_supported_speeds(struct phy_device *phy,
210 unsigned int *speeds,
211 unsigned int size)
212{
213 return phy_speeds(speeds, size, phy->supported);
214}
215
216/**
217 * phy_check_valid - check if there is a valid PHY setting which matches
218 * speed, duplex, and feature mask
219 * @speed: speed to match
220 * @duplex: duplex to match
221 * @features: A mask of the valid settings
222 *
223 * Description: Returns true if there is a valid setting, false otherwise.
224 */
225static inline bool phy_check_valid(int speed, int duplex,
226 unsigned long *features)
227{
228 return !!phy_lookup_setting(speed, duplex, features, true);
229}
230
231/**
232 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
233 * @phydev: the target phy_device struct
234 *
235 * Description: Make sure the PHY is set to supported speeds and
236 * duplexes. Drop down by one in this order: 1000/FULL,
237 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF.
238 */
239static void phy_sanitize_settings(struct phy_device *phydev)
240{
241 const struct phy_setting *setting;
242
243 setting = phy_find_valid(phydev->speed, phydev->duplex,
244 phydev->supported);
245 if (setting) {
246 phydev->speed = setting->speed;
247 phydev->duplex = setting->duplex;
248 } else {
249 /* We failed to find anything (no supported speeds?) */
250 phydev->speed = SPEED_UNKNOWN;
251 phydev->duplex = DUPLEX_UNKNOWN;
252 }
253}
254
255/**
256 * phy_ethtool_sset - generic ethtool sset function, handles all the details
257 * @phydev: target phy_device struct
258 * @cmd: ethtool_cmd
259 *
260 * A few notes about parameter checking:
261 *
262 * - We don't set port or transceiver, so we don't care what they
263 * were set to.
264 * - phy_start_aneg() will make sure forced settings are sane, and
265 * choose the next best ones from the ones selected, so we don't
266 * care if ethtool tries to give us bad values.
267 */
268int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
269{
270 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
271 u32 speed = ethtool_cmd_speed(cmd);
272
273 if (cmd->phy_address != phydev->mdio.addr)
274 return -EINVAL;
275
276 /* We make sure that we don't pass unsupported values in to the PHY */
277 ethtool_convert_legacy_u32_to_link_mode(advertising, cmd->advertising);
278 linkmode_and(advertising, advertising, phydev->supported);
279
280 /* Verify the settings we care about. */
281 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
282 return -EINVAL;
283
284 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
285 return -EINVAL;
286
287 if (cmd->autoneg == AUTONEG_DISABLE &&
288 ((speed != SPEED_1000 &&
289 speed != SPEED_100 &&
290 speed != SPEED_10) ||
291 (cmd->duplex != DUPLEX_HALF &&
292 cmd->duplex != DUPLEX_FULL)))
293 return -EINVAL;
294
295 phydev->autoneg = cmd->autoneg;
296
297 phydev->speed = speed;
298
299 linkmode_copy(phydev->advertising, advertising);
300
301 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
302 phydev->advertising, AUTONEG_ENABLE == cmd->autoneg);
303
304 phydev->duplex = cmd->duplex;
305
306 phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl;
307
308 /* Restart the PHY */
309 phy_start_aneg(phydev);
310
311 return 0;
312}
313EXPORT_SYMBOL(phy_ethtool_sset);
314
315int phy_ethtool_ksettings_set(struct phy_device *phydev,
316 const struct ethtool_link_ksettings *cmd)
317{
318 __ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
319 u8 autoneg = cmd->base.autoneg;
320 u8 duplex = cmd->base.duplex;
321 u32 speed = cmd->base.speed;
322
323 if (cmd->base.phy_address != phydev->mdio.addr)
324 return -EINVAL;
325
326 linkmode_copy(advertising, cmd->link_modes.advertising);
327
328 /* We make sure that we don't pass unsupported values in to the PHY */
329 linkmode_and(advertising, advertising, phydev->supported);
330
331 /* Verify the settings we care about. */
332 if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
333 return -EINVAL;
334
335 if (autoneg == AUTONEG_ENABLE && linkmode_empty(advertising))
336 return -EINVAL;
337
338 if (autoneg == AUTONEG_DISABLE &&
339 ((speed != SPEED_1000 &&
340 speed != SPEED_100 &&
341 speed != SPEED_10) ||
342 (duplex != DUPLEX_HALF &&
343 duplex != DUPLEX_FULL)))
344 return -EINVAL;
345
346 phydev->autoneg = autoneg;
347
348 phydev->speed = speed;
349
350 linkmode_copy(phydev->advertising, advertising);
351
352 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
353 phydev->advertising, autoneg == AUTONEG_ENABLE);
354
355 phydev->duplex = duplex;
356
357 phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl;
358
359 /* Restart the PHY */
360 phy_start_aneg(phydev);
361
362 return 0;
363}
364EXPORT_SYMBOL(phy_ethtool_ksettings_set);
365
366void phy_ethtool_ksettings_get(struct phy_device *phydev,
367 struct ethtool_link_ksettings *cmd)
368{
369 linkmode_copy(cmd->link_modes.supported, phydev->supported);
370 linkmode_copy(cmd->link_modes.advertising, phydev->advertising);
371 linkmode_copy(cmd->link_modes.lp_advertising, phydev->lp_advertising);
372
373 cmd->base.speed = phydev->speed;
374 cmd->base.duplex = phydev->duplex;
375 if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
376 cmd->base.port = PORT_BNC;
377 else
378 cmd->base.port = PORT_MII;
379 cmd->base.transceiver = phy_is_internal(phydev) ?
380 XCVR_INTERNAL : XCVR_EXTERNAL;
381 cmd->base.phy_address = phydev->mdio.addr;
382 cmd->base.autoneg = phydev->autoneg;
383 cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl;
384 cmd->base.eth_tp_mdix = phydev->mdix;
385}
386EXPORT_SYMBOL(phy_ethtool_ksettings_get);
387
388/**
389 * phy_mii_ioctl - generic PHY MII ioctl interface
390 * @phydev: the phy_device struct
391 * @ifr: &struct ifreq for socket ioctl's
392 * @cmd: ioctl cmd to execute
393 *
394 * Note that this function is currently incompatible with the
395 * PHYCONTROL layer. It changes registers without regard to
396 * current state. Use at own risk.
397 */
398int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
399{
400 struct mii_ioctl_data *mii_data = if_mii(ifr);
401 u16 val = mii_data->val_in;
402 bool change_autoneg = false;
403 int prtad, devad;
404
405 switch (cmd) {
406 case SIOCGMIIPHY:
407 mii_data->phy_id = phydev->mdio.addr;
408 /* fall through */
409
410 case SIOCGMIIREG:
411 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
412 prtad = mdio_phy_id_prtad(mii_data->phy_id);
413 devad = mdio_phy_id_devad(mii_data->phy_id);
414 devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
415 } else {
416 prtad = mii_data->phy_id;
417 devad = mii_data->reg_num;
418 }
419 mii_data->val_out = mdiobus_read(phydev->mdio.bus, prtad,
420 devad);
421 return 0;
422
423 case SIOCSMIIREG:
424 if (mdio_phy_id_is_c45(mii_data->phy_id)) {
425 prtad = mdio_phy_id_prtad(mii_data->phy_id);
426 devad = mdio_phy_id_devad(mii_data->phy_id);
427 devad = MII_ADDR_C45 | devad << 16 | mii_data->reg_num;
428 } else {
429 prtad = mii_data->phy_id;
430 devad = mii_data->reg_num;
431 }
432 if (prtad == phydev->mdio.addr) {
433 switch (devad) {
434 case MII_BMCR:
435 if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) {
436 if (phydev->autoneg == AUTONEG_ENABLE)
437 change_autoneg = true;
438 phydev->autoneg = AUTONEG_DISABLE;
439 if (val & BMCR_FULLDPLX)
440 phydev->duplex = DUPLEX_FULL;
441 else
442 phydev->duplex = DUPLEX_HALF;
443 if (val & BMCR_SPEED1000)
444 phydev->speed = SPEED_1000;
445 else if (val & BMCR_SPEED100)
446 phydev->speed = SPEED_100;
447 else phydev->speed = SPEED_10;
448 }
449 else {
450 if (phydev->autoneg == AUTONEG_DISABLE)
451 change_autoneg = true;
452 phydev->autoneg = AUTONEG_ENABLE;
453 }
454 break;
455 case MII_ADVERTISE:
456 mii_adv_mod_linkmode_adv_t(phydev->advertising,
457 val);
458 change_autoneg = true;
459 break;
460 case MII_CTRL1000:
461 mii_ctrl1000_mod_linkmode_adv_t(phydev->advertising,
462 val);
463 change_autoneg = true;
464 break;
465 default:
466 /* do nothing */
467 break;
468 }
469 }
470
471 mdiobus_write(phydev->mdio.bus, prtad, devad, val);
472
473 if (prtad == phydev->mdio.addr &&
474 devad == MII_BMCR &&
475 val & BMCR_RESET)
476 return phy_init_hw(phydev);
477
478 if (change_autoneg)
479 return phy_start_aneg(phydev);
480
481 return 0;
482
483 case SIOCSHWTSTAMP:
484 if (phydev->drv && phydev->drv->hwtstamp)
485 return phydev->drv->hwtstamp(phydev, ifr);
486 /* fall through */
487
488 default:
489 return -EOPNOTSUPP;
490 }
491}
492EXPORT_SYMBOL(phy_mii_ioctl);
493
494void phy_queue_state_machine(struct phy_device *phydev, unsigned long jiffies)
495{
496 mod_delayed_work(system_power_efficient_wq, &phydev->state_queue,
497 jiffies);
498}
499EXPORT_SYMBOL(phy_queue_state_machine);
500
501static void phy_trigger_machine(struct phy_device *phydev)
502{
503 phy_queue_state_machine(phydev, 0);
504}
505
506static int phy_config_aneg(struct phy_device *phydev)
507{
508 if (phydev->drv->config_aneg)
509 return phydev->drv->config_aneg(phydev);
510
511 /* Clause 45 PHYs that don't implement Clause 22 registers are not
512 * allowed to call genphy_config_aneg()
513 */
514 if (phydev->is_c45 && !(phydev->c45_ids.devices_in_package & BIT(0)))
515 return genphy_c45_config_aneg(phydev);
516
517 return genphy_config_aneg(phydev);
518}
519
520/**
521 * phy_check_link_status - check link status and set state accordingly
522 * @phydev: the phy_device struct
523 *
524 * Description: Check for link and whether autoneg was triggered / is running
525 * and set state accordingly
526 */
527static int phy_check_link_status(struct phy_device *phydev)
528{
529 int err;
530
531 WARN_ON(!mutex_is_locked(&phydev->lock));
532
533 /* Keep previous state if loopback is enabled because some PHYs
534 * report that Link is Down when loopback is enabled.
535 */
536 if (phydev->loopback_enabled)
537 return 0;
538
539 err = phy_read_status(phydev);
540 if (err)
541 return err;
542
543 if (phydev->link && phydev->state != PHY_RUNNING) {
544 phydev->state = PHY_RUNNING;
545 phy_link_up(phydev);
546 } else if (!phydev->link && phydev->state != PHY_NOLINK) {
547 phydev->state = PHY_NOLINK;
548 phy_link_down(phydev, true);
549 }
550
551 return 0;
552}
553
554/**
555 * phy_start_aneg - start auto-negotiation for this PHY device
556 * @phydev: the phy_device struct
557 *
558 * Description: Sanitizes the settings (if we're not autonegotiating
559 * them), and then calls the driver's config_aneg function.
560 * If the PHYCONTROL Layer is operating, we change the state to
561 * reflect the beginning of Auto-negotiation or forcing.
562 */
563int phy_start_aneg(struct phy_device *phydev)
564{
565 int err;
566
567 if (!phydev->drv)
568 return -EIO;
569
570 mutex_lock(&phydev->lock);
571
572 if (AUTONEG_DISABLE == phydev->autoneg)
573 phy_sanitize_settings(phydev);
574
575 err = phy_config_aneg(phydev);
576 if (err < 0)
577 goto out_unlock;
578
579 if (phy_is_started(phydev))
580 err = phy_check_link_status(phydev);
581out_unlock:
582 mutex_unlock(&phydev->lock);
583
584 return err;
585}
586EXPORT_SYMBOL(phy_start_aneg);
587
588static int phy_poll_aneg_done(struct phy_device *phydev)
589{
590 unsigned int retries = 100;
591 int ret;
592
593 do {
594 msleep(100);
595 ret = phy_aneg_done(phydev);
596 } while (!ret && --retries);
597
598 if (!ret)
599 return -ETIMEDOUT;
600
601 return ret < 0 ? ret : 0;
602}
603
604/**
605 * phy_speed_down - set speed to lowest speed supported by both link partners
606 * @phydev: the phy_device struct
607 * @sync: perform action synchronously
608 *
609 * Description: Typically used to save energy when waiting for a WoL packet
610 *
611 * WARNING: Setting sync to false may cause the system being unable to suspend
612 * in case the PHY generates an interrupt when finishing the autonegotiation.
613 * This interrupt may wake up the system immediately after suspend.
614 * Therefore use sync = false only if you're sure it's safe with the respective
615 * network chip.
616 */
617int phy_speed_down(struct phy_device *phydev, bool sync)
618{
619 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
620 int ret;
621
622 if (phydev->autoneg != AUTONEG_ENABLE)
623 return 0;
624
625 linkmode_copy(adv_tmp, phydev->advertising);
626
627 ret = phy_speed_down_core(phydev);
628 if (ret)
629 return ret;
630
631 linkmode_copy(phydev->adv_old, adv_tmp);
632
633 if (linkmode_equal(phydev->advertising, adv_tmp))
634 return 0;
635
636 ret = phy_config_aneg(phydev);
637 if (ret)
638 return ret;
639
640 return sync ? phy_poll_aneg_done(phydev) : 0;
641}
642EXPORT_SYMBOL_GPL(phy_speed_down);
643
644/**
645 * phy_speed_up - (re)set advertised speeds to all supported speeds
646 * @phydev: the phy_device struct
647 *
648 * Description: Used to revert the effect of phy_speed_down
649 */
650int phy_speed_up(struct phy_device *phydev)
651{
652 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv_tmp);
653
654 if (phydev->autoneg != AUTONEG_ENABLE)
655 return 0;
656
657 if (linkmode_empty(phydev->adv_old))
658 return 0;
659
660 linkmode_copy(adv_tmp, phydev->advertising);
661 linkmode_copy(phydev->advertising, phydev->adv_old);
662 linkmode_zero(phydev->adv_old);
663
664 if (linkmode_equal(phydev->advertising, adv_tmp))
665 return 0;
666
667 return phy_config_aneg(phydev);
668}
669EXPORT_SYMBOL_GPL(phy_speed_up);
670
671/**
672 * phy_start_machine - start PHY state machine tracking
673 * @phydev: the phy_device struct
674 *
675 * Description: The PHY infrastructure can run a state machine
676 * which tracks whether the PHY is starting up, negotiating,
677 * etc. This function starts the delayed workqueue which tracks
678 * the state of the PHY. If you want to maintain your own state machine,
679 * do not call this function.
680 */
681void phy_start_machine(struct phy_device *phydev)
682{
683 phy_trigger_machine(phydev);
684}
685EXPORT_SYMBOL_GPL(phy_start_machine);
686
687/**
688 * phy_stop_machine - stop the PHY state machine tracking
689 * @phydev: target phy_device struct
690 *
691 * Description: Stops the state machine delayed workqueue, sets the
692 * state to UP (unless it wasn't up yet). This function must be
693 * called BEFORE phy_detach.
694 */
695void phy_stop_machine(struct phy_device *phydev)
696{
697 cancel_delayed_work_sync(&phydev->state_queue);
698
699 mutex_lock(&phydev->lock);
700 if (phy_is_started(phydev))
701 phydev->state = PHY_UP;
702 mutex_unlock(&phydev->lock);
703}
704
705/**
706 * phy_error - enter HALTED state for this PHY device
707 * @phydev: target phy_device struct
708 *
709 * Moves the PHY to the HALTED state in response to a read
710 * or write error, and tells the controller the link is down.
711 * Must not be called from interrupt context, or while the
712 * phydev->lock is held.
713 */
714static void phy_error(struct phy_device *phydev)
715{
716 WARN_ON(1);
717
718 mutex_lock(&phydev->lock);
719 phydev->state = PHY_HALTED;
720 mutex_unlock(&phydev->lock);
721
722 phy_trigger_machine(phydev);
723}
724
725/**
726 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
727 * @phydev: target phy_device struct
728 */
729static int phy_disable_interrupts(struct phy_device *phydev)
730{
731 int err;
732
733 /* Disable PHY interrupts */
734 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
735 if (err)
736 return err;
737
738 /* Clear the interrupt */
739 return phy_clear_interrupt(phydev);
740}
741
742/**
743 * phy_interrupt - PHY interrupt handler
744 * @irq: interrupt line
745 * @phy_dat: phy_device pointer
746 *
747 * Description: Handle PHY interrupt
748 */
749static irqreturn_t phy_interrupt(int irq, void *phy_dat)
750{
751 struct phy_device *phydev = phy_dat;
752
753 if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev))
754 return IRQ_NONE;
755
756 if (phydev->drv->handle_interrupt) {
757 if (phydev->drv->handle_interrupt(phydev))
758 goto phy_err;
759 } else {
760 /* reschedule state queue work to run as soon as possible */
761 phy_trigger_machine(phydev);
762 }
763
764 if (phy_clear_interrupt(phydev))
765 goto phy_err;
766 return IRQ_HANDLED;
767
768phy_err:
769 phy_error(phydev);
770 return IRQ_NONE;
771}
772
773/**
774 * phy_enable_interrupts - Enable the interrupts from the PHY side
775 * @phydev: target phy_device struct
776 */
777static int phy_enable_interrupts(struct phy_device *phydev)
778{
779 int err = phy_clear_interrupt(phydev);
780
781 if (err < 0)
782 return err;
783
784 return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
785}
786
787/**
788 * phy_request_interrupt - request and enable interrupt for a PHY device
789 * @phydev: target phy_device struct
790 *
791 * Description: Request and enable the interrupt for the given PHY.
792 * If this fails, then we set irq to PHY_POLL.
793 * This should only be called with a valid IRQ number.
794 */
795void phy_request_interrupt(struct phy_device *phydev)
796{
797 int err;
798
799 err = request_threaded_irq(phydev->irq, NULL, phy_interrupt,
800 IRQF_ONESHOT | IRQF_SHARED,
801 phydev_name(phydev), phydev);
802 if (err) {
803 phydev_warn(phydev, "Error %d requesting IRQ %d, falling back to polling\n",
804 err, phydev->irq);
805 phydev->irq = PHY_POLL;
806 } else {
807 if (phy_enable_interrupts(phydev)) {
808 phydev_warn(phydev, "Can't enable interrupt, falling back to polling\n");
809 phy_free_interrupt(phydev);
810 phydev->irq = PHY_POLL;
811 }
812 }
813}
814EXPORT_SYMBOL(phy_request_interrupt);
815
816/**
817 * phy_free_interrupt - disable and free interrupt for a PHY device
818 * @phydev: target phy_device struct
819 *
820 * Description: Disable and free the interrupt for the given PHY.
821 * This should only be called with a valid IRQ number.
822 */
823void phy_free_interrupt(struct phy_device *phydev)
824{
825 phy_disable_interrupts(phydev);
826 free_irq(phydev->irq, phydev);
827}
828EXPORT_SYMBOL(phy_free_interrupt);
829
830/**
831 * phy_stop - Bring down the PHY link, and stop checking the status
832 * @phydev: target phy_device struct
833 */
834void phy_stop(struct phy_device *phydev)
835{
836 if (!phy_is_started(phydev)) {
837 WARN(1, "called from state %s\n",
838 phy_state_to_str(phydev->state));
839 return;
840 }
841
842 mutex_lock(&phydev->lock);
843
844 phydev->state = PHY_HALTED;
845
846 mutex_unlock(&phydev->lock);
847
848 phy_state_machine(&phydev->state_queue.work);
849 phy_stop_machine(phydev);
850
851 /* Cannot call flush_scheduled_work() here as desired because
852 * of rtnl_lock(), but PHY_HALTED shall guarantee irq handler
853 * will not reenable interrupts.
854 */
855}
856EXPORT_SYMBOL(phy_stop);
857
858/**
859 * phy_start - start or restart a PHY device
860 * @phydev: target phy_device struct
861 *
862 * Description: Indicates the attached device's readiness to
863 * handle PHY-related work. Used during startup to start the
864 * PHY, and after a call to phy_stop() to resume operation.
865 * Also used to indicate the MDIO bus has cleared an error
866 * condition.
867 */
868void phy_start(struct phy_device *phydev)
869{
870 mutex_lock(&phydev->lock);
871
872 if (phydev->state != PHY_READY && phydev->state != PHY_HALTED) {
873 WARN(1, "called from state %s\n",
874 phy_state_to_str(phydev->state));
875 goto out;
876 }
877
878 /* if phy was suspended, bring the physical link up again */
879 __phy_resume(phydev);
880
881 phydev->state = PHY_UP;
882
883 phy_start_machine(phydev);
884out:
885 mutex_unlock(&phydev->lock);
886}
887EXPORT_SYMBOL(phy_start);
888
889/**
890 * phy_state_machine - Handle the state machine
891 * @work: work_struct that describes the work to be done
892 */
893void phy_state_machine(struct work_struct *work)
894{
895 struct delayed_work *dwork = to_delayed_work(work);
896 struct phy_device *phydev =
897 container_of(dwork, struct phy_device, state_queue);
898 bool needs_aneg = false, do_suspend = false;
899 enum phy_state old_state;
900 int err = 0;
901
902 mutex_lock(&phydev->lock);
903
904 old_state = phydev->state;
905
906 switch (phydev->state) {
907 case PHY_DOWN:
908 case PHY_READY:
909 break;
910 case PHY_UP:
911 needs_aneg = true;
912
913 break;
914 case PHY_NOLINK:
915 case PHY_RUNNING:
916 err = phy_check_link_status(phydev);
917 break;
918 case PHY_HALTED:
919 if (phydev->link) {
920 phydev->link = 0;
921 phy_link_down(phydev, true);
922 }
923 do_suspend = true;
924 break;
925 }
926
927 mutex_unlock(&phydev->lock);
928
929 if (needs_aneg)
930 err = phy_start_aneg(phydev);
931 else if (do_suspend)
932 phy_suspend(phydev);
933
934 if (err < 0)
935 phy_error(phydev);
936
937 if (old_state != phydev->state) {
938 phydev_dbg(phydev, "PHY state change %s -> %s\n",
939 phy_state_to_str(old_state),
940 phy_state_to_str(phydev->state));
941 if (phydev->drv && phydev->drv->link_change_notify)
942 phydev->drv->link_change_notify(phydev);
943 }
944
945 /* Only re-schedule a PHY state machine change if we are polling the
946 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
947 * between states from phy_mac_interrupt().
948 *
949 * In state PHY_HALTED the PHY gets suspended, so rescheduling the
950 * state machine would be pointless and possibly error prone when
951 * called from phy_disconnect() synchronously.
952 */
953 mutex_lock(&phydev->lock);
954 if (phy_polling_mode(phydev) && phy_is_started(phydev))
955 phy_queue_state_machine(phydev, PHY_STATE_TIME);
956 mutex_unlock(&phydev->lock);
957}
958
959/**
960 * phy_mac_interrupt - MAC says the link has changed
961 * @phydev: phy_device struct with changed link
962 *
963 * The MAC layer is able to indicate there has been a change in the PHY link
964 * status. Trigger the state machine and work a work queue.
965 */
966void phy_mac_interrupt(struct phy_device *phydev)
967{
968 /* Trigger a state machine change */
969 phy_trigger_machine(phydev);
970}
971EXPORT_SYMBOL(phy_mac_interrupt);
972
973static void mmd_eee_adv_to_linkmode(unsigned long *advertising, u16 eee_adv)
974{
975 linkmode_zero(advertising);
976
977 if (eee_adv & MDIO_EEE_100TX)
978 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
979 advertising);
980 if (eee_adv & MDIO_EEE_1000T)
981 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
982 advertising);
983 if (eee_adv & MDIO_EEE_10GT)
984 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
985 advertising);
986 if (eee_adv & MDIO_EEE_1000KX)
987 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
988 advertising);
989 if (eee_adv & MDIO_EEE_10GKX4)
990 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
991 advertising);
992 if (eee_adv & MDIO_EEE_10GKR)
993 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
994 advertising);
995}
996
997/**
998 * phy_init_eee - init and check the EEE feature
999 * @phydev: target phy_device struct
1000 * @clk_stop_enable: PHY may stop the clock during LPI
1001 *
1002 * Description: it checks if the Energy-Efficient Ethernet (EEE)
1003 * is supported by looking at the MMD registers 3.20 and 7.60/61
1004 * and it programs the MMD register 3.0 setting the "Clock stop enable"
1005 * bit if required.
1006 */
1007int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
1008{
1009 if (!phydev->drv)
1010 return -EIO;
1011
1012 /* According to 802.3az,the EEE is supported only in full duplex-mode.
1013 */
1014 if (phydev->duplex == DUPLEX_FULL) {
1015 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
1016 __ETHTOOL_DECLARE_LINK_MODE_MASK(lp);
1017 __ETHTOOL_DECLARE_LINK_MODE_MASK(adv);
1018 int eee_lp, eee_cap, eee_adv;
1019 int status;
1020 u32 cap;
1021
1022 /* Read phy status to properly get the right settings */
1023 status = phy_read_status(phydev);
1024 if (status)
1025 return status;
1026
1027 /* First check if the EEE ability is supported */
1028 eee_cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1029 if (eee_cap <= 0)
1030 goto eee_exit_err;
1031
1032 cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1033 if (!cap)
1034 goto eee_exit_err;
1035
1036 /* Check which link settings negotiated and verify it in
1037 * the EEE advertising registers.
1038 */
1039 eee_lp = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1040 if (eee_lp <= 0)
1041 goto eee_exit_err;
1042
1043 eee_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1044 if (eee_adv <= 0)
1045 goto eee_exit_err;
1046
1047 mmd_eee_adv_to_linkmode(adv, eee_adv);
1048 mmd_eee_adv_to_linkmode(lp, eee_lp);
1049 linkmode_and(common, adv, lp);
1050
1051 if (!phy_check_valid(phydev->speed, phydev->duplex, common))
1052 goto eee_exit_err;
1053
1054 if (clk_stop_enable)
1055 /* Configure the PHY to stop receiving xMII
1056 * clock while it is signaling LPI.
1057 */
1058 phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1,
1059 MDIO_PCS_CTRL1_CLKSTOP_EN);
1060
1061 return 0; /* EEE supported */
1062 }
1063eee_exit_err:
1064 return -EPROTONOSUPPORT;
1065}
1066EXPORT_SYMBOL(phy_init_eee);
1067
1068/**
1069 * phy_get_eee_err - report the EEE wake error count
1070 * @phydev: target phy_device struct
1071 *
1072 * Description: it is to report the number of time where the PHY
1073 * failed to complete its normal wake sequence.
1074 */
1075int phy_get_eee_err(struct phy_device *phydev)
1076{
1077 if (!phydev->drv)
1078 return -EIO;
1079
1080 return phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR);
1081}
1082EXPORT_SYMBOL(phy_get_eee_err);
1083
1084/**
1085 * phy_ethtool_get_eee - get EEE supported and status
1086 * @phydev: target phy_device struct
1087 * @data: ethtool_eee data
1088 *
1089 * Description: it reportes the Supported/Advertisement/LP Advertisement
1090 * capabilities.
1091 */
1092int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
1093{
1094 int val;
1095
1096 if (!phydev->drv)
1097 return -EIO;
1098
1099 /* Get Supported EEE */
1100 val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1101 if (val < 0)
1102 return val;
1103 data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1104
1105 /* Get advertisement EEE */
1106 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1107 if (val < 0)
1108 return val;
1109 data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1110 data->eee_enabled = !!data->advertised;
1111
1112 /* Get LP advertisement EEE */
1113 val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_LPABLE);
1114 if (val < 0)
1115 return val;
1116 data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1117
1118 data->eee_active = !!(data->advertised & data->lp_advertised);
1119
1120 return 0;
1121}
1122EXPORT_SYMBOL(phy_ethtool_get_eee);
1123
1124/**
1125 * phy_ethtool_set_eee - set EEE supported and status
1126 * @phydev: target phy_device struct
1127 * @data: ethtool_eee data
1128 *
1129 * Description: it is to program the Advertisement EEE register.
1130 */
1131int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
1132{
1133 int cap, old_adv, adv = 0, ret;
1134
1135 if (!phydev->drv)
1136 return -EIO;
1137
1138 /* Get Supported EEE */
1139 cap = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE);
1140 if (cap < 0)
1141 return cap;
1142
1143 old_adv = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV);
1144 if (old_adv < 0)
1145 return old_adv;
1146
1147 if (data->eee_enabled) {
1148 adv = !data->advertised ? cap :
1149 ethtool_adv_to_mmd_eee_adv_t(data->advertised) & cap;
1150 /* Mask prohibited EEE modes */
1151 adv &= ~phydev->eee_broken_modes;
1152 }
1153
1154 if (old_adv != adv) {
1155 ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV, adv);
1156 if (ret < 0)
1157 return ret;
1158
1159 /* Restart autonegotiation so the new modes get sent to the
1160 * link partner.
1161 */
1162 ret = phy_restart_aneg(phydev);
1163 if (ret < 0)
1164 return ret;
1165 }
1166
1167 return 0;
1168}
1169EXPORT_SYMBOL(phy_ethtool_set_eee);
1170
1171int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1172{
1173 if (phydev->drv && phydev->drv->set_wol)
1174 return phydev->drv->set_wol(phydev, wol);
1175
1176 return -EOPNOTSUPP;
1177}
1178EXPORT_SYMBOL(phy_ethtool_set_wol);
1179
1180void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1181{
1182 if (phydev->drv && phydev->drv->get_wol)
1183 phydev->drv->get_wol(phydev, wol);
1184}
1185EXPORT_SYMBOL(phy_ethtool_get_wol);
1186
1187int phy_ethtool_get_link_ksettings(struct net_device *ndev,
1188 struct ethtool_link_ksettings *cmd)
1189{
1190 struct phy_device *phydev = ndev->phydev;
1191
1192 if (!phydev)
1193 return -ENODEV;
1194
1195 phy_ethtool_ksettings_get(phydev, cmd);
1196
1197 return 0;
1198}
1199EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);
1200
1201int phy_ethtool_set_link_ksettings(struct net_device *ndev,
1202 const struct ethtool_link_ksettings *cmd)
1203{
1204 struct phy_device *phydev = ndev->phydev;
1205
1206 if (!phydev)
1207 return -ENODEV;
1208
1209 return phy_ethtool_ksettings_set(phydev, cmd);
1210}
1211EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1212
1213int phy_ethtool_nway_reset(struct net_device *ndev)
1214{
1215 struct phy_device *phydev = ndev->phydev;
1216
1217 if (!phydev)
1218 return -ENODEV;
1219
1220 if (!phydev->drv)
1221 return -EIO;
1222
1223 return phy_restart_aneg(phydev);
1224}
1225EXPORT_SYMBOL(phy_ethtool_nway_reset);