1 // SPDX-License-Identifier: GPL-2.0+
2 /* Framework for finding and configuring PHYs.
3 * Also contains generic PHY driver
7 * Copyright (c) 2004 Freescale Semiconductor, Inc.
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/kernel.h>
13 #include <linux/string.h>
14 #include <linux/errno.h>
15 #include <linux/unistd.h>
16 #include <linux/slab.h>
17 #include <linux/interrupt.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
20 #include <linux/netdevice.h>
21 #include <linux/etherdevice.h>
22 #include <linux/skbuff.h>
24 #include <linux/module.h>
25 #include <linux/mii.h>
26 #include <linux/ethtool.h>
27 #include <linux/bitmap.h>
28 #include <linux/phy.h>
29 #include <linux/phy_led_triggers.h>
30 #include <linux/sfp.h>
31 #include <linux/mdio.h>
33 #include <linux/uaccess.h>
35 MODULE_DESCRIPTION("PHY library");
36 MODULE_AUTHOR("Andy Fleming");
37 MODULE_LICENSE("GPL");
39 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
40 EXPORT_SYMBOL_GPL(phy_basic_features);
42 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
43 EXPORT_SYMBOL_GPL(phy_basic_t1_features);
45 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
46 EXPORT_SYMBOL_GPL(phy_gbit_features);
48 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
49 EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
51 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
52 EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
54 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
55 EXPORT_SYMBOL_GPL(phy_10gbit_features);
57 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
58 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
60 const int phy_basic_ports_array[3] = {
61 ETHTOOL_LINK_MODE_Autoneg_BIT,
62 ETHTOOL_LINK_MODE_TP_BIT,
63 ETHTOOL_LINK_MODE_MII_BIT,
65 EXPORT_SYMBOL_GPL(phy_basic_ports_array);
67 const int phy_fibre_port_array[1] = {
68 ETHTOOL_LINK_MODE_FIBRE_BIT,
70 EXPORT_SYMBOL_GPL(phy_fibre_port_array);
72 const int phy_all_ports_features_array[7] = {
73 ETHTOOL_LINK_MODE_Autoneg_BIT,
74 ETHTOOL_LINK_MODE_TP_BIT,
75 ETHTOOL_LINK_MODE_MII_BIT,
76 ETHTOOL_LINK_MODE_FIBRE_BIT,
77 ETHTOOL_LINK_MODE_AUI_BIT,
78 ETHTOOL_LINK_MODE_BNC_BIT,
79 ETHTOOL_LINK_MODE_Backplane_BIT,
81 EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
83 const int phy_10_100_features_array[4] = {
84 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
85 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
86 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
87 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
89 EXPORT_SYMBOL_GPL(phy_10_100_features_array);
91 const int phy_basic_t1_features_array[2] = {
92 ETHTOOL_LINK_MODE_TP_BIT,
93 ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
95 EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
97 const int phy_gbit_features_array[2] = {
98 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
99 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
101 EXPORT_SYMBOL_GPL(phy_gbit_features_array);
103 const int phy_10gbit_features_array[1] = {
104 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
106 EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
108 const int phy_10gbit_fec_features_array[1] = {
109 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
111 EXPORT_SYMBOL_GPL(phy_10gbit_fec_features_array);
113 __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
114 EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
116 static const int phy_10gbit_full_features_array[] = {
117 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
118 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
119 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
120 ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
123 static void features_init(void)
125 /* 10/100 half/full*/
126 linkmode_set_bit_array(phy_basic_ports_array,
127 ARRAY_SIZE(phy_basic_ports_array),
129 linkmode_set_bit_array(phy_10_100_features_array,
130 ARRAY_SIZE(phy_10_100_features_array),
134 linkmode_set_bit_array(phy_basic_t1_features_array,
135 ARRAY_SIZE(phy_basic_t1_features_array),
136 phy_basic_t1_features);
138 /* 10/100 half/full + 1000 half/full */
139 linkmode_set_bit_array(phy_basic_ports_array,
140 ARRAY_SIZE(phy_basic_ports_array),
142 linkmode_set_bit_array(phy_10_100_features_array,
143 ARRAY_SIZE(phy_10_100_features_array),
145 linkmode_set_bit_array(phy_gbit_features_array,
146 ARRAY_SIZE(phy_gbit_features_array),
149 /* 10/100 half/full + 1000 half/full + fibre*/
150 linkmode_set_bit_array(phy_basic_ports_array,
151 ARRAY_SIZE(phy_basic_ports_array),
152 phy_gbit_fibre_features);
153 linkmode_set_bit_array(phy_10_100_features_array,
154 ARRAY_SIZE(phy_10_100_features_array),
155 phy_gbit_fibre_features);
156 linkmode_set_bit_array(phy_gbit_features_array,
157 ARRAY_SIZE(phy_gbit_features_array),
158 phy_gbit_fibre_features);
159 linkmode_set_bit_array(phy_fibre_port_array,
160 ARRAY_SIZE(phy_fibre_port_array),
161 phy_gbit_fibre_features);
163 /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
164 linkmode_set_bit_array(phy_all_ports_features_array,
165 ARRAY_SIZE(phy_all_ports_features_array),
166 phy_gbit_all_ports_features);
167 linkmode_set_bit_array(phy_10_100_features_array,
168 ARRAY_SIZE(phy_10_100_features_array),
169 phy_gbit_all_ports_features);
170 linkmode_set_bit_array(phy_gbit_features_array,
171 ARRAY_SIZE(phy_gbit_features_array),
172 phy_gbit_all_ports_features);
174 /* 10/100 half/full + 1000 half/full + 10G full*/
175 linkmode_set_bit_array(phy_all_ports_features_array,
176 ARRAY_SIZE(phy_all_ports_features_array),
177 phy_10gbit_features);
178 linkmode_set_bit_array(phy_10_100_features_array,
179 ARRAY_SIZE(phy_10_100_features_array),
180 phy_10gbit_features);
181 linkmode_set_bit_array(phy_gbit_features_array,
182 ARRAY_SIZE(phy_gbit_features_array),
183 phy_10gbit_features);
184 linkmode_set_bit_array(phy_10gbit_features_array,
185 ARRAY_SIZE(phy_10gbit_features_array),
186 phy_10gbit_features);
188 /* 10/100/1000/10G full */
189 linkmode_set_bit_array(phy_all_ports_features_array,
190 ARRAY_SIZE(phy_all_ports_features_array),
191 phy_10gbit_full_features);
192 linkmode_set_bit_array(phy_10gbit_full_features_array,
193 ARRAY_SIZE(phy_10gbit_full_features_array),
194 phy_10gbit_full_features);
196 linkmode_set_bit_array(phy_10gbit_fec_features_array,
197 ARRAY_SIZE(phy_10gbit_fec_features_array),
198 phy_10gbit_fec_features);
201 void phy_device_free(struct phy_device *phydev)
203 put_device(&phydev->mdio.dev);
205 EXPORT_SYMBOL(phy_device_free);
207 static void phy_mdio_device_free(struct mdio_device *mdiodev)
209 struct phy_device *phydev;
211 phydev = container_of(mdiodev, struct phy_device, mdio);
212 phy_device_free(phydev);
215 static void phy_device_release(struct device *dev)
217 kfree(to_phy_device(dev));
220 static void phy_mdio_device_remove(struct mdio_device *mdiodev)
222 struct phy_device *phydev;
224 phydev = container_of(mdiodev, struct phy_device, mdio);
225 phy_device_remove(phydev);
228 static struct phy_driver genphy_driver;
229 extern struct phy_driver genphy_c45_driver;
231 static LIST_HEAD(phy_fixup_list);
232 static DEFINE_MUTEX(phy_fixup_lock);
235 static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
237 struct device_driver *drv = phydev->mdio.dev.driver;
238 struct phy_driver *phydrv = to_phy_driver(drv);
239 struct net_device *netdev = phydev->attached_dev;
241 if (!drv || !phydrv->suspend)
244 /* PHY not attached? May suspend if the PHY has not already been
245 * suspended as part of a prior call to phy_disconnect() ->
246 * phy_detach() -> phy_suspend() because the parent netdev might be the
247 * MDIO bus driver and clock gated at this point.
252 if (netdev->wol_enabled)
255 /* As long as not all affected network drivers support the
256 * wol_enabled flag, let's check for hints that WoL is enabled.
257 * Don't suspend PHY if the attached netdev parent may wake up.
258 * The parent may point to a PCI device, as in tg3 driver.
260 if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
263 /* Also don't suspend PHY if the netdev itself may wakeup. This
264 * is the case for devices w/o underlaying pwr. mgmt. aware bus,
267 if (device_may_wakeup(&netdev->dev))
271 return !phydev->suspended;
274 static int mdio_bus_phy_suspend(struct device *dev)
276 struct phy_device *phydev = to_phy_device(dev);
278 /* We must stop the state machine manually, otherwise it stops out of
279 * control, possibly with the phydev->lock held. Upon resume, netdev
280 * may call phy routines that try to grab the same lock, and that may
281 * lead to a deadlock.
283 if (phydev->attached_dev && phydev->adjust_link)
284 phy_stop_machine(phydev);
286 if (!mdio_bus_phy_may_suspend(phydev))
289 phydev->suspended_by_mdio_bus = 1;
291 return phy_suspend(phydev);
294 static int mdio_bus_phy_resume(struct device *dev)
296 struct phy_device *phydev = to_phy_device(dev);
299 if (!phydev->suspended_by_mdio_bus)
302 phydev->suspended_by_mdio_bus = 0;
304 ret = phy_resume(phydev);
309 if (phydev->attached_dev && phydev->adjust_link)
310 phy_start_machine(phydev);
315 static int mdio_bus_phy_restore(struct device *dev)
317 struct phy_device *phydev = to_phy_device(dev);
318 struct net_device *netdev = phydev->attached_dev;
324 ret = phy_init_hw(phydev);
328 if (phydev->attached_dev && phydev->adjust_link)
329 phy_start_machine(phydev);
334 static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
335 .suspend = mdio_bus_phy_suspend,
336 .resume = mdio_bus_phy_resume,
337 .freeze = mdio_bus_phy_suspend,
338 .thaw = mdio_bus_phy_resume,
339 .restore = mdio_bus_phy_restore,
342 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
346 #define MDIO_BUS_PHY_PM_OPS NULL
348 #endif /* CONFIG_PM */
351 * phy_register_fixup - creates a new phy_fixup and adds it to the list
352 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
353 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
354 * It can also be PHY_ANY_UID
355 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
357 * @run: The actual code to be run when a matching PHY is found
359 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
360 int (*run)(struct phy_device *))
362 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
367 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
368 fixup->phy_uid = phy_uid;
369 fixup->phy_uid_mask = phy_uid_mask;
372 mutex_lock(&phy_fixup_lock);
373 list_add_tail(&fixup->list, &phy_fixup_list);
374 mutex_unlock(&phy_fixup_lock);
378 EXPORT_SYMBOL(phy_register_fixup);
380 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
381 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
382 int (*run)(struct phy_device *))
384 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
386 EXPORT_SYMBOL(phy_register_fixup_for_uid);
388 /* Registers a fixup to be run on the PHY with id string bus_id */
389 int phy_register_fixup_for_id(const char *bus_id,
390 int (*run)(struct phy_device *))
392 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
394 EXPORT_SYMBOL(phy_register_fixup_for_id);
397 * phy_unregister_fixup - remove a phy_fixup from the list
398 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
399 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
400 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
402 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
404 struct list_head *pos, *n;
405 struct phy_fixup *fixup;
410 mutex_lock(&phy_fixup_lock);
411 list_for_each_safe(pos, n, &phy_fixup_list) {
412 fixup = list_entry(pos, struct phy_fixup, list);
414 if ((!strcmp(fixup->bus_id, bus_id)) &&
415 ((fixup->phy_uid & phy_uid_mask) ==
416 (phy_uid & phy_uid_mask))) {
417 list_del(&fixup->list);
423 mutex_unlock(&phy_fixup_lock);
427 EXPORT_SYMBOL(phy_unregister_fixup);
429 /* Unregisters a fixup of any PHY with the UID in phy_uid */
430 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
432 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
434 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
436 /* Unregisters a fixup of the PHY with id string bus_id */
437 int phy_unregister_fixup_for_id(const char *bus_id)
439 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
441 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
443 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
444 * Fixups can be set to match any in one or more fields.
446 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
448 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
449 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
452 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
453 (phydev->phy_id & fixup->phy_uid_mask))
454 if (fixup->phy_uid != PHY_ANY_UID)
460 /* Runs any matching fixups for this phydev */
461 static int phy_scan_fixups(struct phy_device *phydev)
463 struct phy_fixup *fixup;
465 mutex_lock(&phy_fixup_lock);
466 list_for_each_entry(fixup, &phy_fixup_list, list) {
467 if (phy_needs_fixup(phydev, fixup)) {
468 int err = fixup->run(phydev);
471 mutex_unlock(&phy_fixup_lock);
474 phydev->has_fixups = true;
477 mutex_unlock(&phy_fixup_lock);
482 static int phy_bus_match(struct device *dev, struct device_driver *drv)
484 struct phy_device *phydev = to_phy_device(dev);
485 struct phy_driver *phydrv = to_phy_driver(drv);
486 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
489 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
492 if (phydrv->match_phy_device)
493 return phydrv->match_phy_device(phydev);
495 if (phydev->is_c45) {
496 for (i = 1; i < num_ids; i++) {
497 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
500 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
501 (phydev->c45_ids.device_ids[i] &
502 phydrv->phy_id_mask))
507 return (phydrv->phy_id & phydrv->phy_id_mask) ==
508 (phydev->phy_id & phydrv->phy_id_mask);
513 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
515 struct phy_device *phydev = to_phy_device(dev);
517 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
519 static DEVICE_ATTR_RO(phy_id);
522 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
524 struct phy_device *phydev = to_phy_device(dev);
525 const char *mode = NULL;
527 if (phy_is_internal(phydev))
530 mode = phy_modes(phydev->interface);
532 return sprintf(buf, "%s\n", mode);
534 static DEVICE_ATTR_RO(phy_interface);
537 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
540 struct phy_device *phydev = to_phy_device(dev);
542 return sprintf(buf, "%d\n", phydev->has_fixups);
544 static DEVICE_ATTR_RO(phy_has_fixups);
546 static struct attribute *phy_dev_attrs[] = {
547 &dev_attr_phy_id.attr,
548 &dev_attr_phy_interface.attr,
549 &dev_attr_phy_has_fixups.attr,
552 ATTRIBUTE_GROUPS(phy_dev);
554 static const struct device_type mdio_bus_phy_type = {
556 .groups = phy_dev_groups,
557 .release = phy_device_release,
558 .pm = MDIO_BUS_PHY_PM_OPS,
561 static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
565 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
566 MDIO_ID_ARGS(phy_id));
567 /* We only check for failures in executing the usermode binary,
568 * not whether a PHY driver module exists for the PHY ID.
569 * Accept -ENOENT because this may occur in case no initramfs exists,
570 * then modprobe isn't available.
572 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
573 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
574 ret, (unsigned long)phy_id);
581 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
583 struct phy_c45_device_ids *c45_ids)
585 struct phy_device *dev;
586 struct mdio_device *mdiodev;
589 /* We allocate the device, and initialize the default values */
590 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
592 return ERR_PTR(-ENOMEM);
594 mdiodev = &dev->mdio;
595 mdiodev->dev.parent = &bus->dev;
596 mdiodev->dev.bus = &mdio_bus_type;
597 mdiodev->dev.type = &mdio_bus_phy_type;
599 mdiodev->bus_match = phy_bus_match;
600 mdiodev->addr = addr;
601 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
602 mdiodev->device_free = phy_mdio_device_free;
603 mdiodev->device_remove = phy_mdio_device_remove;
605 dev->speed = SPEED_UNKNOWN;
606 dev->duplex = DUPLEX_UNKNOWN;
610 dev->interface = PHY_INTERFACE_MODE_GMII;
612 dev->autoneg = AUTONEG_ENABLE;
614 dev->is_c45 = is_c45;
615 dev->phy_id = phy_id;
617 dev->c45_ids = *c45_ids;
618 dev->irq = bus->irq[addr];
619 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
621 dev->state = PHY_DOWN;
623 mutex_init(&dev->lock);
624 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
626 /* Request the appropriate module unconditionally; don't
627 * bother trying to do so only if it isn't already loaded,
628 * because that gets complicated. A hotplug event would have
629 * done an unconditional modprobe anyway.
630 * We don't do normal hotplug because it won't work for MDIO
631 * -- because it relies on the device staying around for long
632 * enough for the driver to get loaded. With MDIO, the NIC
633 * driver will get bored and give up as soon as it finds that
634 * there's no driver _already_ loaded.
636 if (is_c45 && c45_ids) {
637 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
640 for (i = 1; i < num_ids; i++) {
641 if (c45_ids->device_ids[i] == 0xffffffff)
644 ret = phy_request_driver_module(dev,
645 c45_ids->device_ids[i]);
650 ret = phy_request_driver_module(dev, phy_id);
654 device_initialize(&mdiodev->dev);
662 EXPORT_SYMBOL(phy_device_create);
664 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
665 * @bus: the target MII bus
666 * @addr: PHY address on the MII bus
667 * @dev_addr: MMD address in the PHY.
668 * @devices_in_package: where to store the devices in package information.
670 * Description: reads devices in package registers of a MMD at @dev_addr
671 * from PHY at @addr on @bus.
673 * Returns: 0 on success, -EIO on failure.
675 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
676 u32 *devices_in_package)
678 int phy_reg, reg_addr;
680 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
681 phy_reg = mdiobus_read(bus, addr, reg_addr);
684 *devices_in_package = phy_reg << 16;
686 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
687 phy_reg = mdiobus_read(bus, addr, reg_addr);
690 *devices_in_package |= phy_reg;
692 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
693 *devices_in_package &= ~BIT(0);
699 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
700 * @bus: the target MII bus
701 * @addr: PHY address on the MII bus
702 * @phy_id: where to store the ID retrieved.
703 * @c45_ids: where to store the c45 ID information.
705 * If the PHY devices-in-package appears to be valid, it and the
706 * corresponding identifiers are stored in @c45_ids, zero is stored
707 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
711 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
712 struct phy_c45_device_ids *c45_ids) {
715 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
716 u32 *devs = &c45_ids->devices_in_package;
718 /* Find first non-zero Devices In package. Device zero is reserved
719 * for 802.3 c45 complied PHYs, so don't probe it at first.
721 for (i = 1; i < num_ids && *devs == 0; i++) {
722 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
726 if ((*devs & 0x1fffffff) == 0x1fffffff) {
727 /* If mostly Fs, there is no device there,
728 * then let's continue to probe more, as some
729 * 10G PHYs have zero Devices In package,
730 * e.g. Cortina CS4315/CS4340 PHY.
732 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
735 /* no device there, let's get out of here */
736 if ((*devs & 0x1fffffff) == 0x1fffffff) {
737 *phy_id = 0xffffffff;
745 /* Now probe Device Identifiers for each device present. */
746 for (i = 1; i < num_ids; i++) {
747 if (!(c45_ids->devices_in_package & (1 << i)))
750 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
751 phy_reg = mdiobus_read(bus, addr, reg_addr);
754 c45_ids->device_ids[i] = phy_reg << 16;
756 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
757 phy_reg = mdiobus_read(bus, addr, reg_addr);
760 c45_ids->device_ids[i] |= phy_reg;
767 * get_phy_id - reads the specified addr for its ID.
768 * @bus: the target MII bus
769 * @addr: PHY address on the MII bus
770 * @phy_id: where to store the ID retrieved.
771 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
772 * @c45_ids: where to store the c45 ID information.
774 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
775 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
778 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
779 * its return value is in turn returned.
782 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
783 bool is_c45, struct phy_c45_device_ids *c45_ids)
788 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
790 /* Grab the bits from PHYIR1, and put them in the upper half */
791 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
793 /* returning -ENODEV doesn't stop bus scanning */
794 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
797 *phy_id = phy_reg << 16;
799 /* Grab the bits from PHYIR2, and put them in the lower half */
800 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
810 * get_phy_device - reads the specified PHY device and returns its @phy_device
812 * @bus: the target MII bus
813 * @addr: PHY address on the MII bus
814 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
816 * Description: Reads the ID registers of the PHY at @addr on the
817 * @bus, then allocates and returns the phy_device to represent it.
819 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
821 struct phy_c45_device_ids c45_ids;
825 c45_ids.devices_in_package = 0;
826 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
828 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
832 /* If the phy_id is mostly Fs, there is no device there */
833 if ((phy_id & 0x1fffffff) == 0x1fffffff)
834 return ERR_PTR(-ENODEV);
836 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
838 EXPORT_SYMBOL(get_phy_device);
841 * phy_device_register - Register the phy device on the MDIO bus
842 * @phydev: phy_device structure to be added to the MDIO bus
844 int phy_device_register(struct phy_device *phydev)
848 err = mdiobus_register_device(&phydev->mdio);
852 /* Deassert the reset signal */
853 phy_device_reset(phydev, 0);
855 /* Run all of the fixups for this PHY */
856 err = phy_scan_fixups(phydev);
858 phydev_err(phydev, "failed to initialize\n");
862 err = device_add(&phydev->mdio.dev);
864 phydev_err(phydev, "failed to add\n");
871 /* Assert the reset signal */
872 phy_device_reset(phydev, 1);
874 mdiobus_unregister_device(&phydev->mdio);
877 EXPORT_SYMBOL(phy_device_register);
880 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
881 * @phydev: phy_device structure to remove
883 * This doesn't free the phy_device itself, it merely reverses the effects
884 * of phy_device_register(). Use phy_device_free() to free the device
885 * after calling this function.
887 void phy_device_remove(struct phy_device *phydev)
890 unregister_mii_timestamper(phydev->mii_ts);
892 device_del(&phydev->mdio.dev);
894 /* Assert the reset signal */
895 phy_device_reset(phydev, 1);
897 mdiobus_unregister_device(&phydev->mdio);
899 EXPORT_SYMBOL(phy_device_remove);
902 * phy_find_first - finds the first PHY device on the bus
903 * @bus: the target MII bus
905 struct phy_device *phy_find_first(struct mii_bus *bus)
907 struct phy_device *phydev;
910 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
911 phydev = mdiobus_get_phy(bus, addr);
917 EXPORT_SYMBOL(phy_find_first);
919 static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
921 struct net_device *netdev = phydev->attached_dev;
925 netif_carrier_on(netdev);
927 netif_carrier_off(netdev);
929 phydev->adjust_link(netdev);
930 if (phydev->mii_ts && phydev->mii_ts->link_state)
931 phydev->mii_ts->link_state(phydev->mii_ts, phydev);
935 * phy_prepare_link - prepares the PHY layer to monitor link status
936 * @phydev: target phy_device struct
937 * @handler: callback function for link status change notifications
939 * Description: Tells the PHY infrastructure to handle the
940 * gory details on monitoring link status (whether through
941 * polling or an interrupt), and to call back to the
942 * connected device driver when the link status changes.
943 * If you want to monitor your own link state, don't call
946 static void phy_prepare_link(struct phy_device *phydev,
947 void (*handler)(struct net_device *))
949 phydev->adjust_link = handler;
953 * phy_connect_direct - connect an ethernet device to a specific phy_device
954 * @dev: the network device to connect
955 * @phydev: the pointer to the phy device
956 * @handler: callback function for state change notifications
957 * @interface: PHY device's interface
959 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
960 void (*handler)(struct net_device *),
961 phy_interface_t interface)
968 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
972 phy_prepare_link(phydev, handler);
973 if (phy_interrupt_is_valid(phydev))
974 phy_request_interrupt(phydev);
978 EXPORT_SYMBOL(phy_connect_direct);
981 * phy_connect - connect an ethernet device to a PHY device
982 * @dev: the network device to connect
983 * @bus_id: the id string of the PHY device to connect
984 * @handler: callback function for state change notifications
985 * @interface: PHY device's interface
987 * Description: Convenience function for connecting ethernet
988 * devices to PHY devices. The default behavior is for
989 * the PHY infrastructure to handle everything, and only notify
990 * the connected driver when the link status changes. If you
991 * don't want, or can't use the provided functionality, you may
992 * choose to call only the subset of functions which provide
993 * the desired functionality.
995 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
996 void (*handler)(struct net_device *),
997 phy_interface_t interface)
999 struct phy_device *phydev;
1003 /* Search the list of PHY devices on the mdio bus for the
1004 * PHY with the requested name
1006 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
1008 pr_err("PHY %s not found\n", bus_id);
1009 return ERR_PTR(-ENODEV);
1011 phydev = to_phy_device(d);
1013 rc = phy_connect_direct(dev, phydev, handler, interface);
1020 EXPORT_SYMBOL(phy_connect);
1023 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1025 * @phydev: target phy_device struct
1027 void phy_disconnect(struct phy_device *phydev)
1029 if (phy_is_started(phydev))
1032 if (phy_interrupt_is_valid(phydev))
1033 phy_free_interrupt(phydev);
1035 phydev->adjust_link = NULL;
1039 EXPORT_SYMBOL(phy_disconnect);
1042 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1043 * @phydev: The PHY device to poll
1045 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1046 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1047 * register must be polled until the BMCR_RESET bit clears.
1049 * Furthermore, any attempts to write to PHY registers may have no effect
1050 * or even generate MDIO bus errors until this is complete.
1052 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1053 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1054 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1055 * effort to support such broken PHYs, this function is separate from the
1056 * standard phy_init_hw() which will zero all the other bits in the BMCR
1057 * and reapply all driver-specific and board-specific fixups.
1059 static int phy_poll_reset(struct phy_device *phydev)
1061 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1064 ret = phy_read_poll_timeout(phydev, MII_BMCR, val, !(val & BMCR_RESET),
1065 50000, 600000, true);
1068 /* Some chips (smsc911x) may still need up to another 1ms after the
1069 * BMCR_RESET bit is cleared before they are usable.
1075 int phy_init_hw(struct phy_device *phydev)
1079 /* Deassert the reset signal */
1080 phy_device_reset(phydev, 0);
1085 if (phydev->drv->soft_reset)
1086 ret = phydev->drv->soft_reset(phydev);
1091 ret = phy_scan_fixups(phydev);
1095 if (phydev->drv->config_init)
1096 ret = phydev->drv->config_init(phydev);
1100 EXPORT_SYMBOL(phy_init_hw);
1102 void phy_attached_info(struct phy_device *phydev)
1104 phy_attached_print(phydev, NULL);
1106 EXPORT_SYMBOL(phy_attached_info);
1108 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
1109 char *phy_attached_info_irq(struct phy_device *phydev)
1114 switch(phydev->irq) {
1118 case PHY_IGNORE_INTERRUPT:
1122 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1127 return kasprintf(GFP_KERNEL, "%s", irq_str);
1129 EXPORT_SYMBOL(phy_attached_info_irq);
1131 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1133 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
1134 char *irq_str = phy_attached_info_irq(phydev);
1137 phydev_info(phydev, ATTACHED_FMT "\n",
1138 drv_name, phydev_name(phydev),
1143 phydev_info(phydev, ATTACHED_FMT,
1144 drv_name, phydev_name(phydev),
1153 EXPORT_SYMBOL(phy_attached_print);
1155 static void phy_sysfs_create_links(struct phy_device *phydev)
1157 struct net_device *dev = phydev->attached_dev;
1163 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1168 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1169 &phydev->mdio.dev.kobj,
1172 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1173 kobject_name(&phydev->mdio.dev.kobj),
1175 /* non-fatal - some net drivers can use one netdevice
1176 * with more then one phy
1180 phydev->sysfs_links = true;
1184 phy_standalone_show(struct device *dev, struct device_attribute *attr,
1187 struct phy_device *phydev = to_phy_device(dev);
1189 return sprintf(buf, "%d\n", !phydev->attached_dev);
1191 static DEVICE_ATTR_RO(phy_standalone);
1194 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1195 * @upstream: pointer to the phy device
1196 * @bus: sfp bus representing cage being attached
1198 * This is used to fill in the sfp_upstream_ops .attach member.
1200 void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1202 struct phy_device *phydev = upstream;
1204 if (phydev->attached_dev)
1205 phydev->attached_dev->sfp_bus = bus;
1206 phydev->sfp_bus_attached = true;
1208 EXPORT_SYMBOL(phy_sfp_attach);
1211 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1212 * @upstream: pointer to the phy device
1213 * @bus: sfp bus representing cage being attached
1215 * This is used to fill in the sfp_upstream_ops .detach member.
1217 void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1219 struct phy_device *phydev = upstream;
1221 if (phydev->attached_dev)
1222 phydev->attached_dev->sfp_bus = NULL;
1223 phydev->sfp_bus_attached = false;
1225 EXPORT_SYMBOL(phy_sfp_detach);
1228 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1229 * @phydev: Pointer to phy_device
1230 * @ops: SFP's upstream operations
1232 int phy_sfp_probe(struct phy_device *phydev,
1233 const struct sfp_upstream_ops *ops)
1235 struct sfp_bus *bus;
1238 if (phydev->mdio.dev.fwnode) {
1239 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1241 return PTR_ERR(bus);
1243 phydev->sfp_bus = bus;
1245 ret = sfp_bus_add_upstream(bus, phydev, ops);
1250 EXPORT_SYMBOL(phy_sfp_probe);
1253 * phy_attach_direct - attach a network device to a given PHY device pointer
1254 * @dev: network device to attach
1255 * @phydev: Pointer to phy_device to attach
1256 * @flags: PHY device's dev_flags
1257 * @interface: PHY device's interface
1259 * Description: Called by drivers to attach to a particular PHY
1260 * device. The phy_device is found, and properly hooked up
1261 * to the phy_driver. If no driver is attached, then a
1262 * generic driver is used. The phy_device is given a ptr to
1263 * the attaching device, and given a callback for link status
1264 * change. The phy_device is returned to the attaching driver.
1265 * This function takes a reference on the phy device.
1267 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1268 u32 flags, phy_interface_t interface)
1270 struct mii_bus *bus = phydev->mdio.bus;
1271 struct device *d = &phydev->mdio.dev;
1272 struct module *ndev_owner = NULL;
1273 bool using_genphy = false;
1276 /* For Ethernet device drivers that register their own MDIO bus, we
1277 * will have bus->owner match ndev_mod, so we do not want to increment
1278 * our own module->refcnt here, otherwise we would not be able to
1282 ndev_owner = dev->dev.parent->driver->owner;
1283 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1284 phydev_err(phydev, "failed to get the bus module\n");
1290 /* Assume that if there is no driver, that it doesn't
1291 * exist, and we should use the genphy driver.
1295 d->driver = &genphy_c45_driver.mdiodrv.driver;
1297 d->driver = &genphy_driver.mdiodrv.driver;
1299 using_genphy = true;
1302 if (!try_module_get(d->driver->owner)) {
1303 phydev_err(phydev, "failed to get the device driver module\n");
1305 goto error_put_device;
1309 err = d->driver->probe(d);
1311 err = device_bind_driver(d);
1314 goto error_module_put;
1317 if (phydev->attached_dev) {
1318 dev_err(&dev->dev, "PHY already attached\n");
1323 phydev->phy_link_change = phy_link_change;
1325 phydev->attached_dev = dev;
1326 dev->phydev = phydev;
1328 if (phydev->sfp_bus_attached)
1329 dev->sfp_bus = phydev->sfp_bus;
1332 /* Some Ethernet drivers try to connect to a PHY device before
1333 * calling register_netdevice() -> netdev_register_kobject() and
1334 * does the dev->dev.kobj initialization. Here we only check for
1335 * success which indicates that the network device kobject is
1336 * ready. Once we do that we still need to keep track of whether
1337 * links were successfully set up or not for phy_detach() to
1338 * remove them accordingly.
1340 phydev->sysfs_links = false;
1342 phy_sysfs_create_links(phydev);
1344 if (!phydev->attached_dev) {
1345 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1346 &dev_attr_phy_standalone.attr);
1348 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1351 phydev->dev_flags |= flags;
1353 phydev->interface = interface;
1355 phydev->state = PHY_READY;
1357 /* Initial carrier state is off as the phy is about to be
1361 netif_carrier_off(phydev->attached_dev);
1363 /* Do initial configuration here, now that
1364 * we have certain key parameters
1365 * (dev_flags and interface)
1367 err = phy_init_hw(phydev);
1372 phy_led_triggers_register(phydev);
1377 /* phy_detach() does all of the cleanup below */
1382 module_put(d->driver->owner);
1385 if (ndev_owner != bus->owner)
1386 module_put(bus->owner);
1389 EXPORT_SYMBOL(phy_attach_direct);
1392 * phy_attach - attach a network device to a particular PHY device
1393 * @dev: network device to attach
1394 * @bus_id: Bus ID of PHY device to attach
1395 * @interface: PHY device's interface
1397 * Description: Same as phy_attach_direct() except that a PHY bus_id
1398 * string is passed instead of a pointer to a struct phy_device.
1400 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1401 phy_interface_t interface)
1403 struct bus_type *bus = &mdio_bus_type;
1404 struct phy_device *phydev;
1409 return ERR_PTR(-EINVAL);
1411 /* Search the list of PHY devices on the mdio bus for the
1412 * PHY with the requested name
1414 d = bus_find_device_by_name(bus, NULL, bus_id);
1416 pr_err("PHY %s not found\n", bus_id);
1417 return ERR_PTR(-ENODEV);
1419 phydev = to_phy_device(d);
1421 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1428 EXPORT_SYMBOL(phy_attach);
1430 static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1431 struct device_driver *driver)
1433 struct device *d = &phydev->mdio.dev;
1440 ret = d->driver == driver;
1446 bool phy_driver_is_genphy(struct phy_device *phydev)
1448 return phy_driver_is_genphy_kind(phydev,
1449 &genphy_driver.mdiodrv.driver);
1451 EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1453 bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1455 return phy_driver_is_genphy_kind(phydev,
1456 &genphy_c45_driver.mdiodrv.driver);
1458 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1461 * phy_detach - detach a PHY device from its network device
1462 * @phydev: target phy_device struct
1464 * This detaches the phy device from its network device and the phy
1465 * driver, and drops the reference count taken in phy_attach_direct().
1467 void phy_detach(struct phy_device *phydev)
1469 struct net_device *dev = phydev->attached_dev;
1470 struct module *ndev_owner = NULL;
1471 struct mii_bus *bus;
1473 if (phydev->sysfs_links) {
1475 sysfs_remove_link(&dev->dev.kobj, "phydev");
1476 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1479 if (!phydev->attached_dev)
1480 sysfs_remove_file(&phydev->mdio.dev.kobj,
1481 &dev_attr_phy_standalone.attr);
1483 phy_suspend(phydev);
1485 phydev->attached_dev->phydev = NULL;
1486 phydev->attached_dev = NULL;
1488 phydev->phylink = NULL;
1490 phy_led_triggers_unregister(phydev);
1492 module_put(phydev->mdio.dev.driver->owner);
1494 /* If the device had no specific driver before (i.e. - it
1495 * was using the generic driver), we unbind the device
1496 * from the generic driver so that there's a chance a
1497 * real driver could be loaded
1499 if (phy_driver_is_genphy(phydev) ||
1500 phy_driver_is_genphy_10g(phydev))
1501 device_release_driver(&phydev->mdio.dev);
1504 * The phydev might go away on the put_device() below, so avoid
1505 * a use-after-free bug by reading the underlying bus first.
1507 bus = phydev->mdio.bus;
1509 put_device(&phydev->mdio.dev);
1511 ndev_owner = dev->dev.parent->driver->owner;
1512 if (ndev_owner != bus->owner)
1513 module_put(bus->owner);
1515 /* Assert the reset signal */
1516 phy_device_reset(phydev, 1);
1518 EXPORT_SYMBOL(phy_detach);
1520 int phy_suspend(struct phy_device *phydev)
1522 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1523 struct net_device *netdev = phydev->attached_dev;
1524 struct phy_driver *phydrv = phydev->drv;
1527 /* If the device has WOL enabled, we cannot suspend the PHY */
1528 phy_ethtool_get_wol(phydev, &wol);
1529 if (wol.wolopts || (netdev && netdev->wol_enabled))
1532 if (!phydrv || !phydrv->suspend)
1535 ret = phydrv->suspend(phydev);
1537 phydev->suspended = true;
1541 EXPORT_SYMBOL(phy_suspend);
1543 int __phy_resume(struct phy_device *phydev)
1545 struct phy_driver *phydrv = phydev->drv;
1548 WARN_ON(!mutex_is_locked(&phydev->lock));
1550 if (!phydrv || !phydrv->resume)
1553 ret = phydrv->resume(phydev);
1555 phydev->suspended = false;
1559 EXPORT_SYMBOL(__phy_resume);
1561 int phy_resume(struct phy_device *phydev)
1565 mutex_lock(&phydev->lock);
1566 ret = __phy_resume(phydev);
1567 mutex_unlock(&phydev->lock);
1571 EXPORT_SYMBOL(phy_resume);
1573 int phy_loopback(struct phy_device *phydev, bool enable)
1575 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1578 mutex_lock(&phydev->lock);
1580 if (enable && phydev->loopback_enabled) {
1585 if (!enable && !phydev->loopback_enabled) {
1590 if (phydev->drv && phydrv->set_loopback)
1591 ret = phydrv->set_loopback(phydev, enable);
1598 phydev->loopback_enabled = enable;
1601 mutex_unlock(&phydev->lock);
1604 EXPORT_SYMBOL(phy_loopback);
1607 * phy_reset_after_clk_enable - perform a PHY reset if needed
1608 * @phydev: target phy_device struct
1610 * Description: Some PHYs are known to need a reset after their refclk was
1611 * enabled. This function evaluates the flags and perform the reset if it's
1612 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1615 int phy_reset_after_clk_enable(struct phy_device *phydev)
1617 if (!phydev || !phydev->drv)
1620 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1621 phy_device_reset(phydev, 1);
1622 phy_device_reset(phydev, 0);
1628 EXPORT_SYMBOL(phy_reset_after_clk_enable);
1630 /* Generic PHY support and helper functions */
1633 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1634 * @phydev: target phy_device struct
1636 * Description: Writes MII_ADVERTISE with the appropriate values,
1637 * after sanitizing the values to make sure we only advertise
1638 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1639 * hasn't changed, and > 0 if it has changed.
1641 static int genphy_config_advert(struct phy_device *phydev)
1643 int err, bmsr, changed = 0;
1646 /* Only allow advertising what this PHY supports */
1647 linkmode_and(phydev->advertising, phydev->advertising,
1650 adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
1652 /* Setup standard advertisement */
1653 err = phy_modify_changed(phydev, MII_ADVERTISE,
1654 ADVERTISE_ALL | ADVERTISE_100BASE4 |
1655 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
1662 bmsr = phy_read(phydev, MII_BMSR);
1666 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1667 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1670 if (!(bmsr & BMSR_ESTATEN))
1673 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
1675 err = phy_modify_changed(phydev, MII_CTRL1000,
1676 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
1687 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
1688 * @phydev: target phy_device struct
1690 * Description: Writes MII_ADVERTISE with the appropriate values,
1691 * after sanitizing the values to make sure we only advertise
1692 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1693 * hasn't changed, and > 0 if it has changed. This function is intended
1694 * for Clause 37 1000Base-X mode.
1696 static int genphy_c37_config_advert(struct phy_device *phydev)
1700 /* Only allow advertising what this PHY supports */
1701 linkmode_and(phydev->advertising, phydev->advertising,
1704 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
1705 phydev->advertising))
1706 adv |= ADVERTISE_1000XFULL;
1707 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
1708 phydev->advertising))
1709 adv |= ADVERTISE_1000XPAUSE;
1710 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
1711 phydev->advertising))
1712 adv |= ADVERTISE_1000XPSE_ASYM;
1714 return phy_modify_changed(phydev, MII_ADVERTISE,
1715 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1716 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
1721 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1722 * @phydev: target phy_device struct
1724 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1725 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1726 * changed, and 1 if it has changed.
1728 int genphy_config_eee_advert(struct phy_device *phydev)
1732 /* Nothing to disable */
1733 if (!phydev->eee_broken_modes)
1736 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
1737 phydev->eee_broken_modes, 0);
1738 /* If the call failed, we assume that EEE is not supported */
1739 return err < 0 ? 0 : err;
1741 EXPORT_SYMBOL(genphy_config_eee_advert);
1744 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1745 * @phydev: target phy_device struct
1747 * Description: Configures MII_BMCR to force speed/duplex
1748 * to the values in phydev. Assumes that the values are valid.
1749 * Please see phy_sanitize_settings().
1751 int genphy_setup_forced(struct phy_device *phydev)
1756 phydev->asym_pause = 0;
1758 if (SPEED_1000 == phydev->speed)
1759 ctl |= BMCR_SPEED1000;
1760 else if (SPEED_100 == phydev->speed)
1761 ctl |= BMCR_SPEED100;
1763 if (DUPLEX_FULL == phydev->duplex)
1764 ctl |= BMCR_FULLDPLX;
1766 return phy_modify(phydev, MII_BMCR,
1767 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
1769 EXPORT_SYMBOL(genphy_setup_forced);
1772 * genphy_restart_aneg - Enable and Restart Autonegotiation
1773 * @phydev: target phy_device struct
1775 int genphy_restart_aneg(struct phy_device *phydev)
1777 /* Don't isolate the PHY if we're negotiating */
1778 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
1779 BMCR_ANENABLE | BMCR_ANRESTART);
1781 EXPORT_SYMBOL(genphy_restart_aneg);
1784 * genphy_check_and_restart_aneg - Enable and restart auto-negotiation
1785 * @phydev: target phy_device struct
1786 * @restart: whether aneg restart is requested
1788 * Check, and restart auto-negotiation if needed.
1790 int genphy_check_and_restart_aneg(struct phy_device *phydev, bool restart)
1795 /* Advertisement hasn't changed, but maybe aneg was never on to
1796 * begin with? Or maybe phy was isolated?
1798 ret = phy_read(phydev, MII_BMCR);
1802 if (!(ret & BMCR_ANENABLE) || (ret & BMCR_ISOLATE))
1807 return genphy_restart_aneg(phydev);
1811 EXPORT_SYMBOL(genphy_check_and_restart_aneg);
1814 * __genphy_config_aneg - restart auto-negotiation or write BMCR
1815 * @phydev: target phy_device struct
1816 * @changed: whether autoneg is requested
1818 * Description: If auto-negotiation is enabled, we configure the
1819 * advertising, and then restart auto-negotiation. If it is not
1820 * enabled, then we write the BMCR.
1822 int __genphy_config_aneg(struct phy_device *phydev, bool changed)
1826 if (genphy_config_eee_advert(phydev))
1829 if (AUTONEG_ENABLE != phydev->autoneg)
1830 return genphy_setup_forced(phydev);
1832 err = genphy_config_advert(phydev);
1833 if (err < 0) /* error */
1838 return genphy_check_and_restart_aneg(phydev, changed);
1840 EXPORT_SYMBOL(__genphy_config_aneg);
1843 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
1844 * @phydev: target phy_device struct
1846 * Description: If auto-negotiation is enabled, we configure the
1847 * advertising, and then restart auto-negotiation. If it is not
1848 * enabled, then we write the BMCR. This function is intended
1849 * for use with Clause 37 1000Base-X mode.
1851 int genphy_c37_config_aneg(struct phy_device *phydev)
1855 if (phydev->autoneg != AUTONEG_ENABLE)
1856 return genphy_setup_forced(phydev);
1858 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
1863 changed = genphy_c37_config_advert(phydev);
1864 if (changed < 0) /* error */
1868 /* Advertisement hasn't changed, but maybe aneg was never on to
1869 * begin with? Or maybe phy was isolated?
1871 int ctl = phy_read(phydev, MII_BMCR);
1876 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1877 changed = 1; /* do restart aneg */
1880 /* Only restart aneg if we are advertising something different
1881 * than we were before.
1884 return genphy_restart_aneg(phydev);
1888 EXPORT_SYMBOL(genphy_c37_config_aneg);
1891 * genphy_aneg_done - return auto-negotiation status
1892 * @phydev: target phy_device struct
1894 * Description: Reads the status register and returns 0 either if
1895 * auto-negotiation is incomplete, or if there was an error.
1896 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1898 int genphy_aneg_done(struct phy_device *phydev)
1900 int retval = phy_read(phydev, MII_BMSR);
1902 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1904 EXPORT_SYMBOL(genphy_aneg_done);
1907 * genphy_update_link - update link status in @phydev
1908 * @phydev: target phy_device struct
1910 * Description: Update the value in phydev->link to reflect the
1911 * current link value. In order to do this, we need to read
1912 * the status register twice, keeping the second value.
1914 int genphy_update_link(struct phy_device *phydev)
1916 int status = 0, bmcr;
1918 bmcr = phy_read(phydev, MII_BMCR);
1922 /* Autoneg is being started, therefore disregard BMSR value and
1923 * report link as down.
1925 if (bmcr & BMCR_ANRESTART)
1928 /* The link state is latched low so that momentary link
1929 * drops can be detected. Do not double-read the status
1930 * in polling mode to detect such short link drops except
1931 * the link was already down.
1933 if (!phy_polling_mode(phydev) || !phydev->link) {
1934 status = phy_read(phydev, MII_BMSR);
1937 else if (status & BMSR_LSTATUS)
1941 /* Read link and autonegotiation status */
1942 status = phy_read(phydev, MII_BMSR);
1946 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
1947 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
1949 /* Consider the case that autoneg was started and "aneg complete"
1950 * bit has been reset, but "link up" bit not yet.
1952 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
1957 EXPORT_SYMBOL(genphy_update_link);
1959 int genphy_read_lpa(struct phy_device *phydev)
1963 if (phydev->autoneg == AUTONEG_ENABLE) {
1964 if (!phydev->autoneg_complete) {
1965 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
1967 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
1971 if (phydev->is_gigabit_capable) {
1972 lpagb = phy_read(phydev, MII_STAT1000);
1976 if (lpagb & LPA_1000MSFAIL) {
1977 int adv = phy_read(phydev, MII_CTRL1000);
1982 if (adv & CTL1000_ENABLE_MASTER)
1983 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
1985 phydev_err(phydev, "Master/Slave resolution failed\n");
1989 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
1993 lpa = phy_read(phydev, MII_LPA);
1997 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
1999 linkmode_zero(phydev->lp_advertising);
2004 EXPORT_SYMBOL(genphy_read_lpa);
2007 * genphy_read_status_fixed - read the link parameters for !aneg mode
2008 * @phydev: target phy_device struct
2010 * Read the current duplex and speed state for a PHY operating with
2011 * autonegotiation disabled.
2013 int genphy_read_status_fixed(struct phy_device *phydev)
2015 int bmcr = phy_read(phydev, MII_BMCR);
2020 if (bmcr & BMCR_FULLDPLX)
2021 phydev->duplex = DUPLEX_FULL;
2023 phydev->duplex = DUPLEX_HALF;
2025 if (bmcr & BMCR_SPEED1000)
2026 phydev->speed = SPEED_1000;
2027 else if (bmcr & BMCR_SPEED100)
2028 phydev->speed = SPEED_100;
2030 phydev->speed = SPEED_10;
2034 EXPORT_SYMBOL(genphy_read_status_fixed);
2037 * genphy_read_status - check the link status and update current link state
2038 * @phydev: target phy_device struct
2040 * Description: Check the link, then figure out the current state
2041 * by comparing what we advertise with what the link partner
2042 * advertises. Start by checking the gigabit possibilities,
2043 * then move on to 10/100.
2045 int genphy_read_status(struct phy_device *phydev)
2047 int err, old_link = phydev->link;
2049 /* Update the link, but return if there was an error */
2050 err = genphy_update_link(phydev);
2054 /* why bother the PHY if nothing can have changed */
2055 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2058 phydev->speed = SPEED_UNKNOWN;
2059 phydev->duplex = DUPLEX_UNKNOWN;
2061 phydev->asym_pause = 0;
2063 err = genphy_read_lpa(phydev);
2067 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2068 phy_resolve_aneg_linkmode(phydev);
2069 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2070 err = genphy_read_status_fixed(phydev);
2077 EXPORT_SYMBOL(genphy_read_status);
2080 * genphy_c37_read_status - check the link status and update current link state
2081 * @phydev: target phy_device struct
2083 * Description: Check the link, then figure out the current state
2084 * by comparing what we advertise with what the link partner
2085 * advertises. This function is for Clause 37 1000Base-X mode.
2087 int genphy_c37_read_status(struct phy_device *phydev)
2089 int lpa, err, old_link = phydev->link;
2091 /* Update the link, but return if there was an error */
2092 err = genphy_update_link(phydev);
2096 /* why bother the PHY if nothing can have changed */
2097 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2100 phydev->duplex = DUPLEX_UNKNOWN;
2102 phydev->asym_pause = 0;
2104 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2105 lpa = phy_read(phydev, MII_LPA);
2109 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2110 phydev->lp_advertising, lpa & LPA_LPACK);
2111 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2112 phydev->lp_advertising, lpa & LPA_1000XFULL);
2113 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2114 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2115 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2116 phydev->lp_advertising,
2117 lpa & LPA_1000XPAUSE_ASYM);
2119 phy_resolve_aneg_linkmode(phydev);
2120 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2121 int bmcr = phy_read(phydev, MII_BMCR);
2126 if (bmcr & BMCR_FULLDPLX)
2127 phydev->duplex = DUPLEX_FULL;
2129 phydev->duplex = DUPLEX_HALF;
2134 EXPORT_SYMBOL(genphy_c37_read_status);
2137 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2138 * @phydev: target phy_device struct
2140 * Description: Perform a software PHY reset using the standard
2141 * BMCR_RESET bit and poll for the reset bit to be cleared.
2143 * Returns: 0 on success, < 0 on failure
2145 int genphy_soft_reset(struct phy_device *phydev)
2147 u16 res = BMCR_RESET;
2150 if (phydev->autoneg == AUTONEG_ENABLE)
2151 res |= BMCR_ANRESTART;
2153 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2157 ret = phy_poll_reset(phydev);
2161 /* BMCR may be reset to defaults */
2162 if (phydev->autoneg == AUTONEG_DISABLE)
2163 ret = genphy_setup_forced(phydev);
2167 EXPORT_SYMBOL(genphy_soft_reset);
2170 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2171 * @phydev: target phy_device struct
2173 * Description: Reads the PHY's abilities and populates
2174 * phydev->supported accordingly.
2176 * Returns: 0 on success, < 0 on failure
2178 int genphy_read_abilities(struct phy_device *phydev)
2182 linkmode_set_bit_array(phy_basic_ports_array,
2183 ARRAY_SIZE(phy_basic_ports_array),
2186 val = phy_read(phydev, MII_BMSR);
2190 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2191 val & BMSR_ANEGCAPABLE);
2193 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2194 val & BMSR_100FULL);
2195 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2196 val & BMSR_100HALF);
2197 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2199 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2202 if (val & BMSR_ESTATEN) {
2203 val = phy_read(phydev, MII_ESTATUS);
2207 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2208 phydev->supported, val & ESTATUS_1000_TFULL);
2209 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2210 phydev->supported, val & ESTATUS_1000_THALF);
2211 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2212 phydev->supported, val & ESTATUS_1000_XFULL);
2217 EXPORT_SYMBOL(genphy_read_abilities);
2219 /* This is used for the phy device which doesn't support the MMD extended
2220 * register access, but it does have side effect when we are trying to access
2221 * the MMD register via indirect method.
2223 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2227 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2229 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2230 u16 regnum, u16 val)
2234 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2236 int genphy_suspend(struct phy_device *phydev)
2238 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2240 EXPORT_SYMBOL(genphy_suspend);
2242 int genphy_resume(struct phy_device *phydev)
2244 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2246 EXPORT_SYMBOL(genphy_resume);
2248 int genphy_loopback(struct phy_device *phydev, bool enable)
2250 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
2251 enable ? BMCR_LOOPBACK : 0);
2253 EXPORT_SYMBOL(genphy_loopback);
2256 * phy_remove_link_mode - Remove a supported link mode
2257 * @phydev: phy_device structure to remove link mode from
2258 * @link_mode: Link mode to be removed
2260 * Description: Some MACs don't support all link modes which the PHY
2261 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2262 * to remove a link mode.
2264 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2266 linkmode_clear_bit(link_mode, phydev->supported);
2267 phy_advertise_supported(phydev);
2269 EXPORT_SYMBOL(phy_remove_link_mode);
2271 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2273 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2274 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2275 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2276 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2280 * phy_advertise_supported - Advertise all supported modes
2281 * @phydev: target phy_device struct
2283 * Description: Called to advertise all supported modes, doesn't touch
2284 * pause mode advertising.
2286 void phy_advertise_supported(struct phy_device *phydev)
2288 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2290 linkmode_copy(new, phydev->supported);
2291 phy_copy_pause_bits(new, phydev->advertising);
2292 linkmode_copy(phydev->advertising, new);
2294 EXPORT_SYMBOL(phy_advertise_supported);
2297 * phy_support_sym_pause - Enable support of symmetrical pause
2298 * @phydev: target phy_device struct
2300 * Description: Called by the MAC to indicate is supports symmetrical
2301 * Pause, but not asym pause.
2303 void phy_support_sym_pause(struct phy_device *phydev)
2305 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
2306 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2308 EXPORT_SYMBOL(phy_support_sym_pause);
2311 * phy_support_asym_pause - Enable support of asym pause
2312 * @phydev: target phy_device struct
2314 * Description: Called by the MAC to indicate is supports Asym Pause.
2316 void phy_support_asym_pause(struct phy_device *phydev)
2318 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2320 EXPORT_SYMBOL(phy_support_asym_pause);
2323 * phy_set_sym_pause - Configure symmetric Pause
2324 * @phydev: target phy_device struct
2325 * @rx: Receiver Pause is supported
2326 * @tx: Transmit Pause is supported
2327 * @autoneg: Auto neg should be used
2329 * Description: Configure advertised Pause support depending on if
2330 * receiver pause and pause auto neg is supported. Generally called
2331 * from the set_pauseparam .ndo.
2333 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
2336 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
2338 if (rx && tx && autoneg)
2339 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2342 linkmode_copy(phydev->advertising, phydev->supported);
2344 EXPORT_SYMBOL(phy_set_sym_pause);
2347 * phy_set_asym_pause - Configure Pause and Asym Pause
2348 * @phydev: target phy_device struct
2349 * @rx: Receiver Pause is supported
2350 * @tx: Transmit Pause is supported
2352 * Description: Configure advertised Pause support depending on if
2353 * transmit and receiver pause is supported. If there has been a
2354 * change in adverting, trigger a new autoneg. Generally called from
2355 * the set_pauseparam .ndo.
2357 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
2359 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
2361 linkmode_copy(oldadv, phydev->advertising);
2362 linkmode_set_pause(phydev->advertising, tx, rx);
2364 if (!linkmode_equal(oldadv, phydev->advertising) &&
2366 phy_start_aneg(phydev);
2368 EXPORT_SYMBOL(phy_set_asym_pause);
2371 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
2372 * @phydev: phy_device struct
2373 * @pp: requested pause configuration
2375 * Description: Test if the PHY/MAC combination supports the Pause
2376 * configuration the user is requesting. Returns True if it is
2377 * supported, false otherwise.
2379 bool phy_validate_pause(struct phy_device *phydev,
2380 struct ethtool_pauseparam *pp)
2382 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2383 phydev->supported) && pp->rx_pause)
2386 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2387 phydev->supported) &&
2388 pp->rx_pause != pp->tx_pause)
2393 EXPORT_SYMBOL(phy_validate_pause);
2396 * phy_get_pause - resolve negotiated pause modes
2397 * @phydev: phy_device struct
2398 * @tx_pause: pointer to bool to indicate whether transmit pause should be
2400 * @rx_pause: pointer to bool to indicate whether receive pause should be
2403 * Resolve and return the flow control modes according to the negotiation
2404 * result. This includes checking that we are operating in full duplex mode.
2405 * See linkmode_resolve_pause() for further details.
2407 void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
2409 if (phydev->duplex != DUPLEX_FULL) {
2415 return linkmode_resolve_pause(phydev->advertising,
2416 phydev->lp_advertising,
2417 tx_pause, rx_pause);
2419 EXPORT_SYMBOL(phy_get_pause);
2421 static bool phy_drv_supports_irq(struct phy_driver *phydrv)
2423 return phydrv->config_intr && phydrv->ack_interrupt;
2427 * phy_probe - probe and init a PHY device
2428 * @dev: device to probe and init
2430 * Description: Take care of setting up the phy_device structure,
2431 * set the state to READY (the driver's init function should
2432 * set it to STARTING if needed).
2434 static int phy_probe(struct device *dev)
2436 struct phy_device *phydev = to_phy_device(dev);
2437 struct device_driver *drv = phydev->mdio.dev.driver;
2438 struct phy_driver *phydrv = to_phy_driver(drv);
2441 phydev->drv = phydrv;
2443 /* Disable the interrupt if the PHY doesn't support it
2444 * but the interrupt is still a valid one
2446 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
2447 phydev->irq = PHY_POLL;
2449 if (phydrv->flags & PHY_IS_INTERNAL)
2450 phydev->is_internal = true;
2452 mutex_lock(&phydev->lock);
2454 if (phydev->drv->probe) {
2455 /* Deassert the reset signal */
2456 phy_device_reset(phydev, 0);
2458 err = phydev->drv->probe(phydev);
2460 /* Assert the reset signal */
2461 phy_device_reset(phydev, 1);
2466 /* Start out supporting everything. Eventually,
2467 * a controller will attach, and may modify one
2468 * or both of these values
2470 if (phydrv->features) {
2471 linkmode_copy(phydev->supported, phydrv->features);
2472 } else if (phydrv->get_features) {
2473 err = phydrv->get_features(phydev);
2474 } else if (phydev->is_c45) {
2475 err = genphy_c45_pma_read_abilities(phydev);
2477 err = genphy_read_abilities(phydev);
2483 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2485 phydev->autoneg = 0;
2487 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2489 phydev->is_gigabit_capable = 1;
2490 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2492 phydev->is_gigabit_capable = 1;
2494 of_set_phy_supported(phydev);
2495 phy_advertise_supported(phydev);
2497 /* Get the EEE modes we want to prohibit. We will ask
2498 * the PHY stop advertising these mode later on
2500 of_set_phy_eee_broken(phydev);
2502 /* The Pause Frame bits indicate that the PHY can support passing
2503 * pause frames. During autonegotiation, the PHYs will determine if
2504 * they should allow pause frames to pass. The MAC driver should then
2505 * use that result to determine whether to enable flow control via
2508 * Normally, PHY drivers should not set the Pause bits, and instead
2509 * allow phylib to do that. However, there may be some situations
2510 * (e.g. hardware erratum) where the driver wants to set only one
2513 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
2514 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
2515 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2517 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2521 /* Set the state to READY by default */
2522 phydev->state = PHY_READY;
2525 mutex_unlock(&phydev->lock);
2530 static int phy_remove(struct device *dev)
2532 struct phy_device *phydev = to_phy_device(dev);
2534 cancel_delayed_work_sync(&phydev->state_queue);
2536 mutex_lock(&phydev->lock);
2537 phydev->state = PHY_DOWN;
2538 mutex_unlock(&phydev->lock);
2540 sfp_bus_del_upstream(phydev->sfp_bus);
2541 phydev->sfp_bus = NULL;
2543 if (phydev->drv && phydev->drv->remove) {
2544 phydev->drv->remove(phydev);
2546 /* Assert the reset signal */
2547 phy_device_reset(phydev, 1);
2555 * phy_driver_register - register a phy_driver with the PHY layer
2556 * @new_driver: new phy_driver to register
2557 * @owner: module owning this PHY
2559 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
2563 /* Either the features are hard coded, or dynamically
2564 * determined. It cannot be both.
2566 if (WARN_ON(new_driver->features && new_driver->get_features)) {
2567 pr_err("%s: features and get_features must not both be set\n",
2572 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
2573 new_driver->mdiodrv.driver.name = new_driver->name;
2574 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
2575 new_driver->mdiodrv.driver.probe = phy_probe;
2576 new_driver->mdiodrv.driver.remove = phy_remove;
2577 new_driver->mdiodrv.driver.owner = owner;
2578 new_driver->mdiodrv.driver.probe_type = PROBE_FORCE_SYNCHRONOUS;
2580 retval = driver_register(&new_driver->mdiodrv.driver);
2582 pr_err("%s: Error %d in registering driver\n",
2583 new_driver->name, retval);
2588 pr_debug("%s: Registered new driver\n", new_driver->name);
2592 EXPORT_SYMBOL(phy_driver_register);
2594 int phy_drivers_register(struct phy_driver *new_driver, int n,
2595 struct module *owner)
2599 for (i = 0; i < n; i++) {
2600 ret = phy_driver_register(new_driver + i, owner);
2603 phy_driver_unregister(new_driver + i);
2609 EXPORT_SYMBOL(phy_drivers_register);
2611 void phy_driver_unregister(struct phy_driver *drv)
2613 driver_unregister(&drv->mdiodrv.driver);
2615 EXPORT_SYMBOL(phy_driver_unregister);
2617 void phy_drivers_unregister(struct phy_driver *drv, int n)
2621 for (i = 0; i < n; i++)
2622 phy_driver_unregister(drv + i);
2624 EXPORT_SYMBOL(phy_drivers_unregister);
2626 static struct phy_driver genphy_driver = {
2627 .phy_id = 0xffffffff,
2628 .phy_id_mask = 0xffffffff,
2629 .name = "Generic PHY",
2630 .soft_reset = genphy_no_soft_reset,
2631 .get_features = genphy_read_abilities,
2632 .suspend = genphy_suspend,
2633 .resume = genphy_resume,
2634 .set_loopback = genphy_loopback,
2637 static int __init phy_init(void)
2641 rc = mdio_bus_init();
2647 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
2651 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
2653 phy_driver_unregister(&genphy_c45_driver);
2661 static void __exit phy_exit(void)
2663 phy_driver_unregister(&genphy_c45_driver);
2664 phy_driver_unregister(&genphy_driver);
2668 subsys_initcall(phy_init);
2669 module_exit(phy_exit);