d0ed7666ed98cbeccee364b38dc31f77cd6ce0d5
1 /*
2 * Generic PHY Management code
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
17 * MA 02111-1307 USA
18 *
19 *
20 * Copyright 2011 Freescale Semiconductor, Inc.
21 * author Andy Fleming
22 *
23 * Based loosely off of Linux's PHY Lib
24 */
26 #include <config.h>
27 #include <common.h>
28 #include <malloc.h>
29 #include <net.h>
30 #include <command.h>
31 #include <miiphy.h>
32 #include <phy.h>
33 #include <errno.h>
34 #include <linux/err.h>
36 /* Generic PHY support and helper functions */
38 /**
39 * genphy_config_advert - sanitize and advertise auto-negotation parameters
40 * @phydev: target phy_device struct
41 *
42 * Description: Writes MII_ADVERTISE with the appropriate values,
43 * after sanitizing the values to make sure we only advertise
44 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
45 * hasn't changed, and > 0 if it has changed.
46 */
47 static int genphy_config_advert(struct phy_device *phydev)
48 {
49 u32 advertise;
50 int oldadv, adv;
51 int err, changed = 0;
53 /* Only allow advertising what
54 * this PHY supports */
55 phydev->advertising &= phydev->supported;
56 advertise = phydev->advertising;
58 /* Setup standard advertisement */
59 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
61 if (adv < 0)
62 return adv;
64 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
65 ADVERTISE_PAUSE_ASYM);
66 if (advertise & ADVERTISED_10baseT_Half)
67 adv |= ADVERTISE_10HALF;
68 if (advertise & ADVERTISED_10baseT_Full)
69 adv |= ADVERTISE_10FULL;
70 if (advertise & ADVERTISED_100baseT_Half)
71 adv |= ADVERTISE_100HALF;
72 if (advertise & ADVERTISED_100baseT_Full)
73 adv |= ADVERTISE_100FULL;
74 if (advertise & ADVERTISED_Pause)
75 adv |= ADVERTISE_PAUSE_CAP;
76 if (advertise & ADVERTISED_Asym_Pause)
77 adv |= ADVERTISE_PAUSE_ASYM;
79 if (adv != oldadv) {
80 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
82 if (err < 0)
83 return err;
84 changed = 1;
85 }
87 /* Configure gigabit if it's supported */
88 if (phydev->supported & (SUPPORTED_1000baseT_Half |
89 SUPPORTED_1000baseT_Full)) {
90 oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
92 if (adv < 0)
93 return adv;
95 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
96 if (advertise & SUPPORTED_1000baseT_Half)
97 adv |= ADVERTISE_1000HALF;
98 if (advertise & SUPPORTED_1000baseT_Full)
99 adv |= ADVERTISE_1000FULL;
101 if (adv != oldadv) {
102 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
103 adv);
105 if (err < 0)
106 return err;
107 changed = 1;
108 }
109 }
111 return changed;
112 }
115 /**
116 * genphy_setup_forced - configures/forces speed/duplex from @phydev
117 * @phydev: target phy_device struct
118 *
119 * Description: Configures MII_BMCR to force speed/duplex
120 * to the values in phydev. Assumes that the values are valid.
121 */
122 static int genphy_setup_forced(struct phy_device *phydev)
123 {
124 int err;
125 int ctl = 0;
127 phydev->pause = phydev->asym_pause = 0;
129 if (SPEED_1000 == phydev->speed)
130 ctl |= BMCR_SPEED1000;
131 else if (SPEED_100 == phydev->speed)
132 ctl |= BMCR_SPEED100;
134 if (DUPLEX_FULL == phydev->duplex)
135 ctl |= BMCR_FULLDPLX;
137 err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
139 return err;
140 }
143 /**
144 * genphy_restart_aneg - Enable and Restart Autonegotiation
145 * @phydev: target phy_device struct
146 */
147 int genphy_restart_aneg(struct phy_device *phydev)
148 {
149 int ctl;
151 ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
153 if (ctl < 0)
154 return ctl;
156 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
158 /* Don't isolate the PHY if we're negotiating */
159 ctl &= ~(BMCR_ISOLATE);
161 ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
163 return ctl;
164 }
167 /**
168 * genphy_config_aneg - restart auto-negotiation or write BMCR
169 * @phydev: target phy_device struct
170 *
171 * Description: If auto-negotiation is enabled, we configure the
172 * advertising, and then restart auto-negotiation. If it is not
173 * enabled, then we write the BMCR.
174 */
175 int genphy_config_aneg(struct phy_device *phydev)
176 {
177 int result;
179 if (AUTONEG_ENABLE != phydev->autoneg)
180 return genphy_setup_forced(phydev);
182 result = genphy_config_advert(phydev);
184 if (result < 0) /* error */
185 return result;
187 if (result == 0) {
188 /* Advertisment hasn't changed, but maybe aneg was never on to
189 * begin with? Or maybe phy was isolated? */
190 int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
192 if (ctl < 0)
193 return ctl;
195 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
196 result = 1; /* do restart aneg */
197 }
199 /* Only restart aneg if we are advertising something different
200 * than we were before. */
201 if (result > 0)
202 result = genphy_restart_aneg(phydev);
204 return result;
205 }
207 /**
208 * genphy_update_link - update link status in @phydev
209 * @phydev: target phy_device struct
210 *
211 * Description: Update the value in phydev->link to reflect the
212 * current link value. In order to do this, we need to read
213 * the status register twice, keeping the second value.
214 */
215 int genphy_update_link(struct phy_device *phydev)
216 {
217 unsigned int mii_reg;
219 /*
220 * Wait if the link is up, and autonegotiation is in progress
221 * (ie - we're capable and it's not done)
222 */
223 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
225 /*
226 * If we already saw the link up, and it hasn't gone down, then
227 * we don't need to wait for autoneg again
228 */
229 if (phydev->link && mii_reg & BMSR_LSTATUS)
230 return 0;
232 if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
233 int i = 0;
235 printf("%s Waiting for PHY auto negotiation to complete",
236 phydev->dev->name);
237 while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
238 /*
239 * Timeout reached ?
240 */
241 if (i > PHY_ANEG_TIMEOUT) {
242 printf(" TIMEOUT !\n");
243 phydev->link = 0;
244 return 0;
245 }
247 if (ctrlc()) {
248 puts("user interrupt!\n");
249 phydev->link = 0;
250 return -EINTR;
251 }
253 if ((i++ % 500) == 0)
254 printf(".");
256 udelay(1000); /* 1 ms */
257 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
258 }
259 printf(" done\n");
260 phydev->link = 1;
261 } else {
262 /* Read the link a second time to clear the latched state */
263 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
265 if (mii_reg & BMSR_LSTATUS)
266 phydev->link = 1;
267 else
268 phydev->link = 0;
269 }
271 return 0;
272 }
274 /*
275 * Generic function which updates the speed and duplex. If
276 * autonegotiation is enabled, it uses the AND of the link
277 * partner's advertised capabilities and our advertised
278 * capabilities. If autonegotiation is disabled, we use the
279 * appropriate bits in the control register.
280 *
281 * Stolen from Linux's mii.c and phy_device.c
282 */
283 static int genphy_parse_link(struct phy_device *phydev)
284 {
285 int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
287 /* We're using autonegotiation */
288 if (mii_reg & BMSR_ANEGCAPABLE) {
289 u32 lpa = 0;
290 u32 gblpa = 0;
292 /* Check for gigabit capability */
293 if (mii_reg & BMSR_ERCAP) {
294 /* We want a list of states supported by
295 * both PHYs in the link
296 */
297 gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
298 gblpa &= phy_read(phydev,
299 MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
300 }
302 /* Set the baseline so we only have to set them
303 * if they're different
304 */
305 phydev->speed = SPEED_10;
306 phydev->duplex = DUPLEX_HALF;
308 /* Check the gigabit fields */
309 if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
310 phydev->speed = SPEED_1000;
312 if (gblpa & PHY_1000BTSR_1000FD)
313 phydev->duplex = DUPLEX_FULL;
315 /* We're done! */
316 return 0;
317 }
319 lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
320 lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
322 if (lpa & (LPA_100FULL | LPA_100HALF)) {
323 phydev->speed = SPEED_100;
325 if (lpa & LPA_100FULL)
326 phydev->duplex = DUPLEX_FULL;
328 } else if (lpa & LPA_10FULL)
329 phydev->duplex = DUPLEX_FULL;
330 } else {
331 u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
333 phydev->speed = SPEED_10;
334 phydev->duplex = DUPLEX_HALF;
336 if (bmcr & BMCR_FULLDPLX)
337 phydev->duplex = DUPLEX_FULL;
339 if (bmcr & BMCR_SPEED1000)
340 phydev->speed = SPEED_1000;
341 else if (bmcr & BMCR_SPEED100)
342 phydev->speed = SPEED_100;
343 }
345 return 0;
346 }
348 int genphy_config(struct phy_device *phydev)
349 {
350 int val;
351 u32 features;
353 /* For now, I'll claim that the generic driver supports
354 * all possible port types */
355 features = (SUPPORTED_TP | SUPPORTED_MII
356 | SUPPORTED_AUI | SUPPORTED_FIBRE |
357 SUPPORTED_BNC);
359 /* Do we support autonegotiation? */
360 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
362 if (val < 0)
363 return val;
365 if (val & BMSR_ANEGCAPABLE)
366 features |= SUPPORTED_Autoneg;
368 if (val & BMSR_100FULL)
369 features |= SUPPORTED_100baseT_Full;
370 if (val & BMSR_100HALF)
371 features |= SUPPORTED_100baseT_Half;
372 if (val & BMSR_10FULL)
373 features |= SUPPORTED_10baseT_Full;
374 if (val & BMSR_10HALF)
375 features |= SUPPORTED_10baseT_Half;
377 if (val & BMSR_ESTATEN) {
378 val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
380 if (val < 0)
381 return val;
383 if (val & ESTATUS_1000_TFULL)
384 features |= SUPPORTED_1000baseT_Full;
385 if (val & ESTATUS_1000_THALF)
386 features |= SUPPORTED_1000baseT_Half;
387 }
389 phydev->supported = features;
390 phydev->advertising = features;
392 genphy_config_aneg(phydev);
394 return 0;
395 }
397 int genphy_startup(struct phy_device *phydev)
398 {
399 genphy_update_link(phydev);
400 genphy_parse_link(phydev);
402 return 0;
403 }
405 int genphy_shutdown(struct phy_device *phydev)
406 {
407 return 0;
408 }
410 static struct phy_driver genphy_driver = {
411 .uid = 0xffffffff,
412 .mask = 0xffffffff,
413 .name = "Generic PHY",
414 .features = 0,
415 .config = genphy_config,
416 .startup = genphy_startup,
417 .shutdown = genphy_shutdown,
418 };
420 static LIST_HEAD(phy_drivers);
422 int phy_init(void)
423 {
424 #ifdef CONFIG_PHY_ATHEROS
425 phy_atheros_init();
426 #endif
427 #ifdef CONFIG_PHY_BROADCOM
428 phy_broadcom_init();
429 #endif
430 #ifdef CONFIG_PHY_DAVICOM
431 phy_davicom_init();
432 #endif
433 #ifdef CONFIG_PHY_LXT
434 phy_lxt_init();
435 #endif
436 #ifdef CONFIG_PHY_MARVELL
437 phy_marvell_init();
438 #endif
439 #ifdef CONFIG_PHY_MICREL
440 phy_micrel_init();
441 #endif
442 #ifdef CONFIG_PHY_NATSEMI
443 phy_natsemi_init();
444 #endif
445 #ifdef CONFIG_PHY_REALTEK
446 phy_realtek_init();
447 #endif
448 #ifdef CONFIG_PHY_SMSC
449 phy_smsc_init();
450 #endif
451 #ifdef CONFIG_PHY_TERANETICS
452 phy_teranetics_init();
453 #endif
454 #ifdef CONFIG_PHY_VITESSE
455 phy_vitesse_init();
456 #endif
458 return 0;
459 }
461 int phy_register(struct phy_driver *drv)
462 {
463 INIT_LIST_HEAD(&drv->list);
464 list_add_tail(&drv->list, &phy_drivers);
466 return 0;
467 }
469 static int phy_probe(struct phy_device *phydev)
470 {
471 int err = 0;
473 phydev->advertising = phydev->supported = phydev->drv->features;
474 phydev->mmds = phydev->drv->mmds;
476 if (phydev->drv->probe)
477 err = phydev->drv->probe(phydev);
479 return err;
480 }
482 static struct phy_driver *generic_for_interface(phy_interface_t interface)
483 {
484 #ifdef CONFIG_PHYLIB_10G
485 if (is_10g_interface(interface))
486 return &gen10g_driver;
487 #endif
489 return &genphy_driver;
490 }
492 static struct phy_driver *get_phy_driver(struct phy_device *phydev,
493 phy_interface_t interface)
494 {
495 struct list_head *entry;
496 int phy_id = phydev->phy_id;
497 struct phy_driver *drv = NULL;
499 list_for_each(entry, &phy_drivers) {
500 drv = list_entry(entry, struct phy_driver, list);
501 if ((drv->uid & drv->mask) == (phy_id & drv->mask))
502 return drv;
503 }
505 /* If we made it here, there's no driver for this PHY */
506 return generic_for_interface(interface);
507 }
509 static struct phy_device *phy_device_create(struct mii_dev *bus, int addr,
510 int phy_id,
511 phy_interface_t interface)
512 {
513 struct phy_device *dev;
515 /* We allocate the device, and initialize the
516 * default values */
517 dev = malloc(sizeof(*dev));
518 if (!dev) {
519 printf("Failed to allocate PHY device for %s:%d\n",
520 bus->name, addr);
521 return NULL;
522 }
524 memset(dev, 0, sizeof(*dev));
526 dev->duplex = -1;
527 dev->link = 1;
528 dev->interface = interface;
530 dev->autoneg = AUTONEG_ENABLE;
532 dev->addr = addr;
533 dev->phy_id = phy_id;
534 dev->bus = bus;
536 dev->drv = get_phy_driver(dev, interface);
538 phy_probe(dev);
540 bus->phymap[addr] = dev;
542 return dev;
543 }
545 /**
546 * get_phy_id - reads the specified addr for its ID.
547 * @bus: the target MII bus
548 * @addr: PHY address on the MII bus
549 * @phy_id: where to store the ID retrieved.
550 *
551 * Description: Reads the ID registers of the PHY at @addr on the
552 * @bus, stores it in @phy_id and returns zero on success.
553 */
554 static int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
555 {
556 int phy_reg;
558 /* Grab the bits from PHYIR1, and put them
559 * in the upper half */
560 phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
562 if (phy_reg < 0)
563 return -EIO;
565 *phy_id = (phy_reg & 0xffff) << 16;
567 /* Grab the bits from PHYIR2, and put them in the lower half */
568 phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
570 if (phy_reg < 0)
571 return -EIO;
573 *phy_id |= (phy_reg & 0xffff);
575 return 0;
576 }
578 static struct phy_device *create_phy_by_mask(struct mii_dev *bus,
579 unsigned phy_mask, int devad, phy_interface_t interface)
580 {
581 u32 phy_id = 0xffffffff;
582 while (phy_mask) {
583 int addr = ffs(phy_mask) - 1;
584 int r = get_phy_id(bus, addr, devad, &phy_id);
585 if (r < 0)
586 return ERR_PTR(r);
587 /* If the PHY ID is mostly f's, we didn't find anything */
588 if ((phy_id & 0x1fffffff) != 0x1fffffff)
589 return phy_device_create(bus, addr, phy_id, interface);
590 phy_mask &= ~(1 << addr);
591 }
592 return NULL;
593 }
595 static struct phy_device *search_for_existing_phy(struct mii_dev *bus,
596 unsigned phy_mask, phy_interface_t interface)
597 {
598 /* If we have one, return the existing device, with new interface */
599 while (phy_mask) {
600 int addr = ffs(phy_mask) - 1;
601 if (bus->phymap[addr]) {
602 bus->phymap[addr]->interface = interface;
603 return bus->phymap[addr];
604 }
605 phy_mask &= ~(1 << addr);
606 }
607 return NULL;
608 }
610 static struct phy_device *get_phy_device_by_mask(struct mii_dev *bus,
611 unsigned phy_mask, phy_interface_t interface)
612 {
613 int i;
614 struct phy_device *phydev;
616 phydev = search_for_existing_phy(bus, phy_mask, interface);
617 if (phydev)
618 return phydev;
619 /* Try Standard (ie Clause 22) access */
620 /* Otherwise we have to try Clause 45 */
621 for (i = 0; i < 5; i++) {
622 phydev = create_phy_by_mask(bus, phy_mask,
623 i ? i : MDIO_DEVAD_NONE, interface);
624 if (IS_ERR(phydev))
625 return NULL;
626 if (phydev)
627 return phydev;
628 }
629 printf("Phy not found\n");
630 return phy_device_create(bus, ffs(phy_mask) - 1, 0xffffffff, interface);
631 }
633 /**
634 * get_phy_device - reads the specified PHY device and returns its @phy_device struct
635 * @bus: the target MII bus
636 * @addr: PHY address on the MII bus
637 *
638 * Description: Reads the ID registers of the PHY at @addr on the
639 * @bus, then allocates and returns the phy_device to represent it.
640 */
641 static struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
642 phy_interface_t interface)
643 {
644 return get_phy_device_by_mask(bus, 1 << addr, interface);
645 }
647 int phy_reset(struct phy_device *phydev)
648 {
649 int reg;
650 int timeout = 500;
651 int devad = MDIO_DEVAD_NONE;
653 #ifdef CONFIG_PHYLIB_10G
654 /* If it's 10G, we need to issue reset through one of the MMDs */
655 if (is_10g_interface(phydev->interface)) {
656 if (!phydev->mmds)
657 gen10g_discover_mmds(phydev);
659 devad = ffs(phydev->mmds) - 1;
660 }
661 #endif
663 reg = phy_read(phydev, devad, MII_BMCR);
664 if (reg < 0) {
665 debug("PHY status read failed\n");
666 return -1;
667 }
669 reg |= BMCR_RESET;
671 if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
672 debug("PHY reset failed\n");
673 return -1;
674 }
676 #ifdef CONFIG_PHY_RESET_DELAY
677 udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
678 #endif
679 /*
680 * Poll the control register for the reset bit to go to 0 (it is
681 * auto-clearing). This should happen within 0.5 seconds per the
682 * IEEE spec.
683 */
684 while ((reg & BMCR_RESET) && timeout--) {
685 reg = phy_read(phydev, devad, MII_BMCR);
687 if (reg < 0) {
688 debug("PHY status read failed\n");
689 return -1;
690 }
691 udelay(1000);
692 }
694 if (reg & BMCR_RESET) {
695 puts("PHY reset timed out\n");
696 return -1;
697 }
699 return 0;
700 }
702 int miiphy_reset(const char *devname, unsigned char addr)
703 {
704 struct mii_dev *bus = miiphy_get_dev_by_name(devname);
705 struct phy_device *phydev;
707 /*
708 * miiphy_reset was only used on standard PHYs, so we'll fake it here.
709 * If later code tries to connect with the right interface, this will
710 * be corrected by get_phy_device in phy_connect()
711 */
712 phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
714 return phy_reset(phydev);
715 }
717 struct phy_device *phy_find_by_mask(struct mii_dev *bus, unsigned phy_mask,
718 phy_interface_t interface)
719 {
720 /* Reset the bus */
721 if (bus->reset)
722 bus->reset(bus);
724 /* Wait 15ms to make sure the PHY has come out of hard reset */
725 udelay(15000);
726 return get_phy_device_by_mask(bus, phy_mask, interface);
727 }
729 void phy_connect_dev(struct phy_device *phydev, struct eth_device *dev)
730 {
731 /* Soft Reset the PHY */
732 phy_reset(phydev);
733 if (phydev->dev) {
734 printf("%s:%d is connected to %s. Reconnecting to %s\n",
735 phydev->bus->name, phydev->addr,
736 phydev->dev->name, dev->name);
737 }
738 phydev->dev = dev;
739 debug("%s connected to %s\n", dev->name, phydev->drv->name);
740 }
742 struct phy_device *phy_connect(struct mii_dev *bus, int addr,
743 struct eth_device *dev, phy_interface_t interface)
744 {
745 struct phy_device *phydev;
747 phydev = phy_find_by_mask(bus, 1 << addr, interface);
748 if (phydev)
749 phy_connect_dev(phydev, dev);
750 else
751 printf("Could not get PHY for %s: addr %d\n", bus->name, addr);
752 return phydev;
753 }
755 /*
756 * Start the PHY. Returns 0 on success, or a negative error code.
757 */
758 int phy_startup(struct phy_device *phydev)
759 {
760 if (phydev->drv->startup)
761 return phydev->drv->startup(phydev);
763 return 0;
764 }
766 static int __board_phy_config(struct phy_device *phydev)
767 {
768 if (phydev->drv->config)
769 return phydev->drv->config(phydev);
770 return 0;
771 }
773 int board_phy_config(struct phy_device *phydev)
774 __attribute__((weak, alias("__board_phy_config")));
776 int phy_config(struct phy_device *phydev)
777 {
778 /* Invoke an optional board-specific helper */
779 board_phy_config(phydev);
781 return 0;
782 }
784 int phy_shutdown(struct phy_device *phydev)
785 {
786 if (phydev->drv->shutdown)
787 phydev->drv->shutdown(phydev);
789 return 0;
790 }