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[deliverable/linux.git] / drivers / net / phy / phy.c
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AF		 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 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 *
16 */
17#include <linux/config.h>
18#include <linux/kernel.h>
19#include <linux/sched.h>
20#include <linux/string.h>
21#include <linux/errno.h>
22#include <linux/unistd.h>
23#include <linux/slab.h>
24#include <linux/interrupt.h>
25#include <linux/init.h>
26#include <linux/delay.h>
27#include <linux/netdevice.h>
28#include <linux/etherdevice.h>
29#include <linux/skbuff.h>
30#include <linux/spinlock.h>
31#include <linux/mm.h>
32#include <linux/module.h>
33#include <linux/version.h>
34#include <linux/mii.h>
35#include <linux/ethtool.h>
36#include <linux/phy.h>
37
38#include <asm/io.h>
39#include <asm/irq.h>
40#include <asm/uaccess.h>
41
42static void phy_change(void *data);
43static void phy_timer(unsigned long data);
44
45/* Convenience function to print out the current phy status
46 */
47void phy_print_status(struct phy_device *phydev)
48{
49 pr_info("%s: Link is %s", phydev->dev.bus_id,
50 phydev->link ? "Up" : "Down");
51 if (phydev->link)
52 printk(" - %d/%s", phydev->speed,
53 DUPLEX_FULL == phydev->duplex ?
54 "Full" : "Half");
55
56 printk("\n");
57}
58EXPORT_SYMBOL(phy_print_status);
59
60
61/* Convenience functions for reading/writing a given PHY
62 * register. They MUST NOT be called from interrupt context,
63 * because the bus read/write functions may wait for an interrupt
64 * to conclude the operation. */
65int phy_read(struct phy_device *phydev, u16 regnum)
66{
67 int retval;
68 struct mii_bus *bus = phydev->bus;
69
70 spin_lock_bh(&bus->mdio_lock);
71 retval = bus->read(bus, phydev->addr, regnum);
72 spin_unlock_bh(&bus->mdio_lock);
73
74 return retval;
75}
76EXPORT_SYMBOL(phy_read);
77
78int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
79{
80 int err;
81 struct mii_bus *bus = phydev->bus;
82
83 spin_lock_bh(&bus->mdio_lock);
84 err = bus->write(bus, phydev->addr, regnum, val);
85 spin_unlock_bh(&bus->mdio_lock);
86
87 return err;
88}
89EXPORT_SYMBOL(phy_write);
90
91
92int phy_clear_interrupt(struct phy_device *phydev)
93{
94 int err = 0;
95
96 if (phydev->drv->ack_interrupt)
97 err = phydev->drv->ack_interrupt(phydev);
98
99 return err;
100}
101
102
103int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
104{
105 int err = 0;
106
107 phydev->interrupts = interrupts;
108 if (phydev->drv->config_intr)
109 err = phydev->drv->config_intr(phydev);
110
111 return err;
112}
113
114
115/* phy_aneg_done
116 *
117 * description: Reads the status register and returns 0 either if
118 * auto-negotiation is incomplete, or if there was an error.
119 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
120 */
121static inline int phy_aneg_done(struct phy_device *phydev)
122{
123 int retval;
124
125 retval = phy_read(phydev, MII_BMSR);
126
127 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
128}
129
130/* phy_start_aneg
131 *
132 * description: Calls the PHY driver's config_aneg, and then
133 * sets the PHY state to PHY_AN if auto-negotiation is enabled,
134 * and to PHY_FORCING if auto-negotiation is disabled. Unless
135 * the PHY is currently HALTED.
136 */
137int phy_start_aneg(struct phy_device *phydev)
138{
139 int err;
140
141 spin_lock(&phydev->lock);
142
143 if (AUTONEG_DISABLE == phydev->autoneg)
144 phy_sanitize_settings(phydev);
145
146 err = phydev->drv->config_aneg(phydev);
147
148 if (err < 0)
149 goto out_unlock;
150
151 if (phydev->state != PHY_HALTED) {
152 if (AUTONEG_ENABLE == phydev->autoneg) {
153 phydev->state = PHY_AN;
154 phydev->link_timeout = PHY_AN_TIMEOUT;
155 } else {
156 phydev->state = PHY_FORCING;
157 phydev->link_timeout = PHY_FORCE_TIMEOUT;
158 }
159 }
160
161out_unlock:
162 spin_unlock(&phydev->lock);
163 return err;
164}
165EXPORT_SYMBOL(phy_start_aneg);
166
167
168/* A structure for mapping a particular speed and duplex
169 * combination to a particular SUPPORTED and ADVERTISED value */
170struct phy_setting {
171 int speed;
172 int duplex;
173 u32 setting;
174};
175
176/* A mapping of all SUPPORTED settings to speed/duplex */
177static struct phy_setting settings[] = {
178 {
179 .speed = 10000,
180 .duplex = DUPLEX_FULL,
181 .setting = SUPPORTED_10000baseT_Full,
182 },
183 {
184 .speed = SPEED_1000,
185 .duplex = DUPLEX_FULL,
186 .setting = SUPPORTED_1000baseT_Full,
187 },
188 {
189 .speed = SPEED_1000,
190 .duplex = DUPLEX_HALF,
191 .setting = SUPPORTED_1000baseT_Half,
192 },
193 {
194 .speed = SPEED_100,
195 .duplex = DUPLEX_FULL,
196 .setting = SUPPORTED_100baseT_Full,
197 },
198 {
199 .speed = SPEED_100,
200 .duplex = DUPLEX_HALF,
201 .setting = SUPPORTED_100baseT_Half,
202 },
203 {
204 .speed = SPEED_10,
205 .duplex = DUPLEX_FULL,
206 .setting = SUPPORTED_10baseT_Full,
207 },
208 {
209 .speed = SPEED_10,
210 .duplex = DUPLEX_HALF,
211 .setting = SUPPORTED_10baseT_Half,
212 },
213};
214
215#define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting))
216
217/* phy_find_setting
218 *
219 * description: Searches the settings array for the setting which
220 * matches the desired speed and duplex, and returns the index
221 * of that setting. Returns the index of the last setting if
222 * none of the others match.
223 */
224static inline int phy_find_setting(int speed, int duplex)
225{
226 int idx = 0;
227
228 while (idx < ARRAY_SIZE(settings) &&
229 (settings[idx].speed != speed ||
230 settings[idx].duplex != duplex))
231 idx++;
232
233 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
234}
235
236/* phy_find_valid
237 * idx: The first index in settings[] to search
238 * features: A mask of the valid settings
239 *
240 * description: Returns the index of the first valid setting less
241 * than or equal to the one pointed to by idx, as determined by
242 * the mask in features. Returns the index of the last setting
243 * if nothing else matches.
244 */
245static inline int phy_find_valid(int idx, u32 features)
246{
247 while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
248 idx++;
249
250 return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
251}
252
253/* phy_sanitize_settings
254 *
255 * description: Make sure the PHY is set to supported speeds and
256 * duplexes. Drop down by one in this order: 1000/FULL,
257 * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF
258 */
259void phy_sanitize_settings(struct phy_device *phydev)
260{
261 u32 features = phydev->supported;
262 int idx;
263
264 /* Sanitize settings based on PHY capabilities */
265 if ((features & SUPPORTED_Autoneg) == 0)
266 phydev->autoneg = 0;
267
268 idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
269 features);
270
271 phydev->speed = settings[idx].speed;
272 phydev->duplex = settings[idx].duplex;
273}
274EXPORT_SYMBOL(phy_sanitize_settings);
275
276/* phy_force_reduction
277 *
278 * description: Reduces the speed/duplex settings by
279 * one notch. The order is so:
280 * 1000/FULL, 1000/HALF, 100/FULL, 100/HALF,
281 * 10/FULL, 10/HALF. The function bottoms out at 10/HALF.
282 */
283static void phy_force_reduction(struct phy_device *phydev)
284{
285 int idx;
286
287 idx = phy_find_setting(phydev->speed, phydev->duplex);
288
289 idx++;
290
291 idx = phy_find_valid(idx, phydev->supported);
292
293 phydev->speed = settings[idx].speed;
294 phydev->duplex = settings[idx].duplex;
295
296 pr_info("Trying %d/%s\n", phydev->speed,
297 DUPLEX_FULL == phydev->duplex ?
298 "FULL" : "HALF");
299}
300
301/* phy_ethtool_sset:
302 * A generic ethtool sset function. Handles all the details
303 *
304 * A few notes about parameter checking:
305 * - We don't set port or transceiver, so we don't care what they
306 * were set to.
307 * - phy_start_aneg() will make sure forced settings are sane, and
308 * choose the next best ones from the ones selected, so we don't
309 * care if ethtool tries to give us bad values
310 */
311int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
312{
313 if (cmd->phy_address != phydev->addr)
314 return -EINVAL;
315
316 /* We make sure that we don't pass unsupported
317 * values in to the PHY */
318 cmd->advertising &= phydev->supported;
319
320 /* Verify the settings we care about. */
321 if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
322 return -EINVAL;
323
324 if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
325 return -EINVAL;
326
327 if (cmd->autoneg == AUTONEG_DISABLE
328 && ((cmd->speed != SPEED_1000
329 && cmd->speed != SPEED_100
330 && cmd->speed != SPEED_10)
331 || (cmd->duplex != DUPLEX_HALF
332 && cmd->duplex != DUPLEX_FULL)))
333 return -EINVAL;
334
335 phydev->autoneg = cmd->autoneg;
336
337 phydev->speed = cmd->speed;
338
339 phydev->advertising = cmd->advertising;
340
341 if (AUTONEG_ENABLE == cmd->autoneg)
342 phydev->advertising |= ADVERTISED_Autoneg;
343 else
344 phydev->advertising &= ~ADVERTISED_Autoneg;
345
346 phydev->duplex = cmd->duplex;
347
348 /* Restart the PHY */
349 phy_start_aneg(phydev);
350
351 return 0;
352}
353
354int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
355{
356 cmd->supported = phydev->supported;
357
358 cmd->advertising = phydev->advertising;
359
360 cmd->speed = phydev->speed;
361 cmd->duplex = phydev->duplex;
362 cmd->port = PORT_MII;
363 cmd->phy_address = phydev->addr;
364 cmd->transceiver = XCVR_EXTERNAL;
365 cmd->autoneg = phydev->autoneg;
366
367 return 0;
368}
369
370
371/* Note that this function is currently incompatible with the
372 * PHYCONTROL layer. It changes registers without regard to
373 * current state. Use at own risk
374 */
375int phy_mii_ioctl(struct phy_device *phydev,
376 struct mii_ioctl_data *mii_data, int cmd)
377{
378 u16 val = mii_data->val_in;
379
380 switch (cmd) {
381 case SIOCGMIIPHY:
382 mii_data->phy_id = phydev->addr;
383 break;
384 case SIOCGMIIREG:
385 mii_data->val_out = phy_read(phydev, mii_data->reg_num);
386 break;
387
388 case SIOCSMIIREG:
389 if (!capable(CAP_NET_ADMIN))
390 return -EPERM;
391
392 if (mii_data->phy_id == phydev->addr) {
393 switch(mii_data->reg_num) {
394 case MII_BMCR:
395 if (val & (BMCR_RESET|BMCR_ANENABLE))
396 phydev->autoneg = AUTONEG_DISABLE;
397 else
398 phydev->autoneg = AUTONEG_ENABLE;
399 if ((!phydev->autoneg) && (val & BMCR_FULLDPLX))
400 phydev->duplex = DUPLEX_FULL;
401 else
402 phydev->duplex = DUPLEX_HALF;
403 break;
404 case MII_ADVERTISE:
405 phydev->advertising = val;
406 break;
407 default:
408 /* do nothing */
409 break;
410 }
411 }
412
413 phy_write(phydev, mii_data->reg_num, val);
414
415 if (mii_data->reg_num == MII_BMCR
416 && val & BMCR_RESET
417 && phydev->drv->config_init)
418 phydev->drv->config_init(phydev);
419 break;
420 }
421
422 return 0;
423}
424
425/* phy_start_machine:
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
431 * changes, pass in the callback, otherwise, pass NULL. If you
432 * want to maintain your own state machine, do not call this
433 * function. */
434void phy_start_machine(struct phy_device *phydev,
435 void (*handler)(struct net_device *))
436{
437 phydev->adjust_state = handler;
438
439 init_timer(&phydev->phy_timer);
440 phydev->phy_timer.function = &phy_timer;
441 phydev->phy_timer.data = (unsigned long) phydev;
442 mod_timer(&phydev->phy_timer, jiffies + HZ);
443}
444
445/* phy_stop_machine
446 *
447 * description: Stops the state machine timer, sets the state to
448 * UP (unless it wasn't up yet), and then frees the interrupt,
449 * if it is in use. This function must be called BEFORE
450 * phy_detach.
451 */
452void phy_stop_machine(struct phy_device *phydev)
453{
454 del_timer_sync(&phydev->phy_timer);
455
456 spin_lock(&phydev->lock);
457 if (phydev->state > PHY_UP)
458 phydev->state = PHY_UP;
459 spin_unlock(&phydev->lock);
460
461 if (phydev->irq != PHY_POLL)
462 phy_stop_interrupts(phydev);
463
464 phydev->adjust_state = NULL;
465}
466
467#ifdef CONFIG_PHYCONTROL
468/* phy_error:
469 *
470 * Moves the PHY to the HALTED state in response to a read
471 * or write error, and tells the controller the link is down.
472 * Must not be called from interrupt context, or while the
473 * phydev->lock is held.
474 */
475void phy_error(struct phy_device *phydev)
476{
477 spin_lock(&phydev->lock);
478 phydev->state = PHY_HALTED;
479 spin_unlock(&phydev->lock);
480}
481
482/* phy_interrupt
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, struct pt_regs *regs)
488{
489 struct phy_device *phydev = phy_dat;
490
491 /* The MDIO bus is not allowed to be written in interrupt
492 * context, so we need to disable the irq here. A work
493 * queue will write the PHY to disable and clear the
494 * interrupt, and then reenable the irq line. */
495 disable_irq_nosync(irq);
496
497 schedule_work(&phydev->phy_queue);
498
499 return IRQ_HANDLED;
500}
501
502/* Enable the interrupts from the PHY side */
503int phy_enable_interrupts(struct phy_device *phydev)
504{
505 int err;
506
507 err = phy_clear_interrupt(phydev);
508
509 if (err < 0)
510 return err;
511
512 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
513
514 return err;
515}
516EXPORT_SYMBOL(phy_enable_interrupts);
517
518/* Disable the PHY interrupts from the PHY side */
519int phy_disable_interrupts(struct phy_device *phydev)
520{
521 int err;
522
523 /* Disable PHY interrupts */
524 err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
525
526 if (err)
527 goto phy_err;
528
529 /* Clear the interrupt */
530 err = phy_clear_interrupt(phydev);
531
532 if (err)
533 goto phy_err;
534
535 return 0;
536
537phy_err:
538 phy_error(phydev);
539
540 return err;
541}
542EXPORT_SYMBOL(phy_disable_interrupts);
543
544/* phy_start_interrupts
545 *
546 * description: Request the interrupt for the given PHY. If
547 * this fails, then we set irq to PHY_POLL.
548 * Otherwise, we enable the interrupts in the PHY.
549 * Returns 0 on success.
550 * This should only be called with a valid IRQ number.
551 */
552int phy_start_interrupts(struct phy_device *phydev)
553{
554 int err = 0;
555
556 INIT_WORK(&phydev->phy_queue, phy_change, phydev);
557
558 if (request_irq(phydev->irq, phy_interrupt,
559 SA_SHIRQ,
560 "phy_interrupt",
561 phydev) < 0) {
562 printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n",
563 phydev->bus->name,
564 phydev->irq);
565 phydev->irq = PHY_POLL;
566 return 0;
567 }
568
569 err = phy_enable_interrupts(phydev);
570
571 return err;
572}
573EXPORT_SYMBOL(phy_start_interrupts);
574
575int phy_stop_interrupts(struct phy_device *phydev)
576{
577 int err;
578
579 err = phy_disable_interrupts(phydev);
580
581 if (err)
582 phy_error(phydev);
583
584 free_irq(phydev->irq, phydev);
585
586 return err;
587}
588EXPORT_SYMBOL(phy_stop_interrupts);
589
590
591/* Scheduled by the phy_interrupt/timer to handle PHY changes */
592static void phy_change(void *data)
593{
594 int err;
595 struct phy_device *phydev = data;
596
597 err = phy_disable_interrupts(phydev);
598
599 if (err)
600 goto phy_err;
601
602 spin_lock(&phydev->lock);
603 if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
604 phydev->state = PHY_CHANGELINK;
605 spin_unlock(&phydev->lock);
606
607 enable_irq(phydev->irq);
608
609 /* Reenable interrupts */
610 err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
611
612 if (err)
613 goto irq_enable_err;
614
615 return;
616
617irq_enable_err:
618 disable_irq(phydev->irq);
619phy_err:
620 phy_error(phydev);
621}
622
623/* Bring down the PHY link, and stop checking the status. */
624void phy_stop(struct phy_device *phydev)
625{
626 spin_lock(&phydev->lock);
627
628 if (PHY_HALTED == phydev->state)
629 goto out_unlock;
630
631 if (phydev->irq != PHY_POLL) {
632 /* Clear any pending interrupts */
633 phy_clear_interrupt(phydev);
634
635 /* Disable PHY Interrupts */
636 phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
637 }
638
639 phydev->state = PHY_HALTED;
640
641out_unlock:
642 spin_unlock(&phydev->lock);
643}
644
645
646/* phy_start
647 *
648 * description: Indicates the attached device's readiness to
649 * handle PHY-related work. Used during startup to start the
650 * PHY, and after a call to phy_stop() to resume operation.
651 * Also used to indicate the MDIO bus has cleared an error
652 * condition.
653 */
654void phy_start(struct phy_device *phydev)
655{
656 spin_lock(&phydev->lock);
657
658 switch (phydev->state) {
659 case PHY_STARTING:
660 phydev->state = PHY_PENDING;
661 break;
662 case PHY_READY:
663 phydev->state = PHY_UP;
664 break;
665 case PHY_HALTED:
666 phydev->state = PHY_RESUMING;
667 default:
668 break;
669 }
670 spin_unlock(&phydev->lock);
671}
672EXPORT_SYMBOL(phy_stop);
673EXPORT_SYMBOL(phy_start);
674
675/* PHY timer which handles the state machine */
676static void phy_timer(unsigned long data)
677{
678 struct phy_device *phydev = (struct phy_device *)data;
679 int needs_aneg = 0;
680 int err = 0;
681
682 spin_lock(&phydev->lock);
683
684 if (phydev->adjust_state)
685 phydev->adjust_state(phydev->attached_dev);
686
687 switch(phydev->state) {
688 case PHY_DOWN:
689 case PHY_STARTING:
690 case PHY_READY:
691 case PHY_PENDING:
692 break;
693 case PHY_UP:
694 needs_aneg = 1;
695
696 phydev->link_timeout = PHY_AN_TIMEOUT;
697
698 break;
699 case PHY_AN:
700 /* Check if negotiation is done. Break
701 * if there's an error */
702 err = phy_aneg_done(phydev);
703 if (err < 0)
704 break;
705
706 /* If auto-negotiation is done, we change to
707 * either RUNNING, or NOLINK */
708 if (err > 0) {
709 err = phy_read_status(phydev);
710
711 if (err)
712 break;
713
714 if (phydev->link) {
715 phydev->state = PHY_RUNNING;
716 netif_carrier_on(phydev->attached_dev);
717 } else {
718 phydev->state = PHY_NOLINK;
719 netif_carrier_off(phydev->attached_dev);
720 }
721
722 phydev->adjust_link(phydev->attached_dev);
723
724 } else if (0 == phydev->link_timeout--) {
725 /* The counter expired, so either we
726 * switch to forced mode, or the
727 * magic_aneg bit exists, and we try aneg
728 * again */
729 if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) {
730 int idx;
731
732 /* We'll start from the
733 * fastest speed, and work
734 * our way down */
735 idx = phy_find_valid(0,
736 phydev->supported);
737
738 phydev->speed = settings[idx].speed;
739 phydev->duplex = settings[idx].duplex;
740
741 phydev->autoneg = AUTONEG_DISABLE;
742 phydev->state = PHY_FORCING;
743 phydev->link_timeout =
744 PHY_FORCE_TIMEOUT;
745
746 pr_info("Trying %d/%s\n",
747 phydev->speed,
748 DUPLEX_FULL ==
749 phydev->duplex ?
750 "FULL" : "HALF");
751 }
752
753 needs_aneg = 1;
754 }
755 break;
756 case PHY_NOLINK:
757 err = phy_read_status(phydev);
758
759 if (err)
760 break;
761
762 if (phydev->link) {
763 phydev->state = PHY_RUNNING;
764 netif_carrier_on(phydev->attached_dev);
765 phydev->adjust_link(phydev->attached_dev);
766 }
767 break;
768 case PHY_FORCING:
769 err = phy_read_status(phydev);
770
771 if (err)
772 break;
773
774 if (phydev->link) {
775 phydev->state = PHY_RUNNING;
776 netif_carrier_on(phydev->attached_dev);
777 } else {
778 if (0 == phydev->link_timeout--) {
779 phy_force_reduction(phydev);
780 needs_aneg = 1;
781 }
782 }
783
784 phydev->adjust_link(phydev->attached_dev);
785 break;
786 case PHY_RUNNING:
787 /* Only register a CHANGE if we are
788 * polling */
789 if (PHY_POLL == phydev->irq)
790 phydev->state = PHY_CHANGELINK;
791 break;
792 case PHY_CHANGELINK:
793 err = phy_read_status(phydev);
794
795 if (err)
796 break;
797
798 if (phydev->link) {
799 phydev->state = PHY_RUNNING;
800 netif_carrier_on(phydev->attached_dev);
801 } else {
802 phydev->state = PHY_NOLINK;
803 netif_carrier_off(phydev->attached_dev);
804 }
805
806 phydev->adjust_link(phydev->attached_dev);
807
808 if (PHY_POLL != phydev->irq)
809 err = phy_config_interrupt(phydev,
810 PHY_INTERRUPT_ENABLED);
811 break;
812 case PHY_HALTED:
813 if (phydev->link) {
814 phydev->link = 0;
815 netif_carrier_off(phydev->attached_dev);
816 phydev->adjust_link(phydev->attached_dev);
817 }
818 break;
819 case PHY_RESUMING:
820
821 err = phy_clear_interrupt(phydev);
822
823 if (err)
824 break;
825
826 err = phy_config_interrupt(phydev,
827 PHY_INTERRUPT_ENABLED);
828
829 if (err)
830 break;
831
832 if (AUTONEG_ENABLE == phydev->autoneg) {
833 err = phy_aneg_done(phydev);
834 if (err < 0)
835 break;
836
837 /* err > 0 if AN is done.
838 * Otherwise, it's 0, and we're
839 * still waiting for AN */
840 if (err > 0) {
841 phydev->state = PHY_RUNNING;
842 } else {
843 phydev->state = PHY_AN;
844 phydev->link_timeout = PHY_AN_TIMEOUT;
845 }
846 } else
847 phydev->state = PHY_RUNNING;
848 break;
849 }
850
851 spin_unlock(&phydev->lock);
852
853 if (needs_aneg)
854 err = phy_start_aneg(phydev);
855
856 if (err < 0)
857 phy_error(phydev);
858
859 mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ);
860}
861
862#endif /* CONFIG_PHYCONTROL */
Linux kernel - Deliverables
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