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.
250 return !phydev->suspended;
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))
273 static int mdio_bus_phy_suspend(struct device *dev)
275 struct phy_device *phydev = to_phy_device(dev);
277 /* We must stop the state machine manually, otherwise it stops out of
278 * control, possibly with the phydev->lock held. Upon resume, netdev
279 * may call phy routines that try to grab the same lock, and that may
280 * lead to a deadlock.
282 if (phydev->attached_dev && phydev->adjust_link)
283 phy_stop_machine(phydev);
285 if (!mdio_bus_phy_may_suspend(phydev))
288 return phy_suspend(phydev);
291 static int mdio_bus_phy_resume(struct device *dev)
293 struct phy_device *phydev = to_phy_device(dev);
296 if (!mdio_bus_phy_may_suspend(phydev))
299 ret = phy_resume(phydev);
304 if (phydev->attached_dev && phydev->adjust_link)
305 phy_start_machine(phydev);
310 static int mdio_bus_phy_restore(struct device *dev)
312 struct phy_device *phydev = to_phy_device(dev);
313 struct net_device *netdev = phydev->attached_dev;
319 ret = phy_init_hw(phydev);
323 if (phydev->attached_dev && phydev->adjust_link)
324 phy_start_machine(phydev);
329 static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
330 .suspend = mdio_bus_phy_suspend,
331 .resume = mdio_bus_phy_resume,
332 .freeze = mdio_bus_phy_suspend,
333 .thaw = mdio_bus_phy_resume,
334 .restore = mdio_bus_phy_restore,
337 #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
341 #define MDIO_BUS_PHY_PM_OPS NULL
343 #endif /* CONFIG_PM */
346 * phy_register_fixup - creates a new phy_fixup and adds it to the list
347 * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
348 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
349 * It can also be PHY_ANY_UID
350 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
352 * @run: The actual code to be run when a matching PHY is found
354 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
355 int (*run)(struct phy_device *))
357 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
362 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
363 fixup->phy_uid = phy_uid;
364 fixup->phy_uid_mask = phy_uid_mask;
367 mutex_lock(&phy_fixup_lock);
368 list_add_tail(&fixup->list, &phy_fixup_list);
369 mutex_unlock(&phy_fixup_lock);
373 EXPORT_SYMBOL(phy_register_fixup);
375 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
376 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
377 int (*run)(struct phy_device *))
379 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
381 EXPORT_SYMBOL(phy_register_fixup_for_uid);
383 /* Registers a fixup to be run on the PHY with id string bus_id */
384 int phy_register_fixup_for_id(const char *bus_id,
385 int (*run)(struct phy_device *))
387 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
389 EXPORT_SYMBOL(phy_register_fixup_for_id);
392 * phy_unregister_fixup - remove a phy_fixup from the list
393 * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
394 * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
395 * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
397 int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
399 struct list_head *pos, *n;
400 struct phy_fixup *fixup;
405 mutex_lock(&phy_fixup_lock);
406 list_for_each_safe(pos, n, &phy_fixup_list) {
407 fixup = list_entry(pos, struct phy_fixup, list);
409 if ((!strcmp(fixup->bus_id, bus_id)) &&
410 ((fixup->phy_uid & phy_uid_mask) ==
411 (phy_uid & phy_uid_mask))) {
412 list_del(&fixup->list);
418 mutex_unlock(&phy_fixup_lock);
422 EXPORT_SYMBOL(phy_unregister_fixup);
424 /* Unregisters a fixup of any PHY with the UID in phy_uid */
425 int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
427 return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
429 EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
431 /* Unregisters a fixup of the PHY with id string bus_id */
432 int phy_unregister_fixup_for_id(const char *bus_id)
434 return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
436 EXPORT_SYMBOL(phy_unregister_fixup_for_id);
438 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
439 * Fixups can be set to match any in one or more fields.
441 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
443 if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
444 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
447 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
448 (phydev->phy_id & fixup->phy_uid_mask))
449 if (fixup->phy_uid != PHY_ANY_UID)
455 /* Runs any matching fixups for this phydev */
456 static int phy_scan_fixups(struct phy_device *phydev)
458 struct phy_fixup *fixup;
460 mutex_lock(&phy_fixup_lock);
461 list_for_each_entry(fixup, &phy_fixup_list, list) {
462 if (phy_needs_fixup(phydev, fixup)) {
463 int err = fixup->run(phydev);
466 mutex_unlock(&phy_fixup_lock);
469 phydev->has_fixups = true;
472 mutex_unlock(&phy_fixup_lock);
477 static int phy_bus_match(struct device *dev, struct device_driver *drv)
479 struct phy_device *phydev = to_phy_device(dev);
480 struct phy_driver *phydrv = to_phy_driver(drv);
481 const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
484 if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
487 if (phydrv->match_phy_device)
488 return phydrv->match_phy_device(phydev);
490 if (phydev->is_c45) {
491 for (i = 1; i < num_ids; i++) {
492 if (phydev->c45_ids.device_ids[i] == 0xffffffff)
495 if ((phydrv->phy_id & phydrv->phy_id_mask) ==
496 (phydev->c45_ids.device_ids[i] &
497 phydrv->phy_id_mask))
502 return (phydrv->phy_id & phydrv->phy_id_mask) ==
503 (phydev->phy_id & phydrv->phy_id_mask);
508 phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
510 struct phy_device *phydev = to_phy_device(dev);
512 return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
514 static DEVICE_ATTR_RO(phy_id);
517 phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
519 struct phy_device *phydev = to_phy_device(dev);
520 const char *mode = NULL;
522 if (phy_is_internal(phydev))
525 mode = phy_modes(phydev->interface);
527 return sprintf(buf, "%s\n", mode);
529 static DEVICE_ATTR_RO(phy_interface);
532 phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
535 struct phy_device *phydev = to_phy_device(dev);
537 return sprintf(buf, "%d\n", phydev->has_fixups);
539 static DEVICE_ATTR_RO(phy_has_fixups);
541 static struct attribute *phy_dev_attrs[] = {
542 &dev_attr_phy_id.attr,
543 &dev_attr_phy_interface.attr,
544 &dev_attr_phy_has_fixups.attr,
547 ATTRIBUTE_GROUPS(phy_dev);
549 static const struct device_type mdio_bus_phy_type = {
551 .groups = phy_dev_groups,
552 .release = phy_device_release,
553 .pm = MDIO_BUS_PHY_PM_OPS,
556 static int phy_request_driver_module(struct phy_device *dev, int phy_id)
560 ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
561 MDIO_ID_ARGS(phy_id));
562 /* We only check for failures in executing the usermode binary,
563 * not whether a PHY driver module exists for the PHY ID.
564 * Accept -ENOENT because this may occur in case no initramfs exists,
565 * then modprobe isn't available.
567 if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
568 phydev_err(dev, "error %d loading PHY driver module for ID 0x%08x\n",
576 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
578 struct phy_c45_device_ids *c45_ids)
580 struct phy_device *dev;
581 struct mdio_device *mdiodev;
584 /* We allocate the device, and initialize the default values */
585 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
587 return ERR_PTR(-ENOMEM);
589 mdiodev = &dev->mdio;
590 mdiodev->dev.parent = &bus->dev;
591 mdiodev->dev.bus = &mdio_bus_type;
592 mdiodev->dev.type = &mdio_bus_phy_type;
594 mdiodev->bus_match = phy_bus_match;
595 mdiodev->addr = addr;
596 mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
597 mdiodev->device_free = phy_mdio_device_free;
598 mdiodev->device_remove = phy_mdio_device_remove;
600 dev->speed = SPEED_UNKNOWN;
601 dev->duplex = DUPLEX_UNKNOWN;
605 dev->interface = PHY_INTERFACE_MODE_GMII;
607 dev->autoneg = AUTONEG_ENABLE;
609 dev->is_c45 = is_c45;
610 dev->phy_id = phy_id;
612 dev->c45_ids = *c45_ids;
613 dev->irq = bus->irq[addr];
614 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
616 dev->state = PHY_DOWN;
618 mutex_init(&dev->lock);
619 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
621 /* Request the appropriate module unconditionally; don't
622 * bother trying to do so only if it isn't already loaded,
623 * because that gets complicated. A hotplug event would have
624 * done an unconditional modprobe anyway.
625 * We don't do normal hotplug because it won't work for MDIO
626 * -- because it relies on the device staying around for long
627 * enough for the driver to get loaded. With MDIO, the NIC
628 * driver will get bored and give up as soon as it finds that
629 * there's no driver _already_ loaded.
631 if (is_c45 && c45_ids) {
632 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
635 for (i = 1; i < num_ids; i++) {
636 if (c45_ids->device_ids[i] == 0xffffffff)
639 ret = phy_request_driver_module(dev,
640 c45_ids->device_ids[i]);
645 ret = phy_request_driver_module(dev, phy_id);
649 device_initialize(&mdiodev->dev);
657 EXPORT_SYMBOL(phy_device_create);
659 /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
660 * @bus: the target MII bus
661 * @addr: PHY address on the MII bus
662 * @dev_addr: MMD address in the PHY.
663 * @devices_in_package: where to store the devices in package information.
665 * Description: reads devices in package registers of a MMD at @dev_addr
666 * from PHY at @addr on @bus.
668 * Returns: 0 on success, -EIO on failure.
670 static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
671 u32 *devices_in_package)
673 int phy_reg, reg_addr;
675 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
676 phy_reg = mdiobus_read(bus, addr, reg_addr);
679 *devices_in_package = phy_reg << 16;
681 reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
682 phy_reg = mdiobus_read(bus, addr, reg_addr);
685 *devices_in_package |= phy_reg;
687 /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
688 *devices_in_package &= ~BIT(0);
694 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
695 * @bus: the target MII bus
696 * @addr: PHY address on the MII bus
697 * @phy_id: where to store the ID retrieved.
698 * @c45_ids: where to store the c45 ID information.
700 * If the PHY devices-in-package appears to be valid, it and the
701 * corresponding identifiers are stored in @c45_ids, zero is stored
702 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
706 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
707 struct phy_c45_device_ids *c45_ids) {
710 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
711 u32 *devs = &c45_ids->devices_in_package;
713 /* Find first non-zero Devices In package. Device zero is reserved
714 * for 802.3 c45 complied PHYs, so don't probe it at first.
716 for (i = 1; i < num_ids && *devs == 0; i++) {
717 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
721 if ((*devs & 0x1fffffff) == 0x1fffffff) {
722 /* If mostly Fs, there is no device there,
723 * then let's continue to probe more, as some
724 * 10G PHYs have zero Devices In package,
725 * e.g. Cortina CS4315/CS4340 PHY.
727 phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
730 /* no device there, let's get out of here */
731 if ((*devs & 0x1fffffff) == 0x1fffffff) {
732 *phy_id = 0xffffffff;
740 /* Now probe Device Identifiers for each device present. */
741 for (i = 1; i < num_ids; i++) {
742 if (!(c45_ids->devices_in_package & (1 << i)))
745 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
746 phy_reg = mdiobus_read(bus, addr, reg_addr);
749 c45_ids->device_ids[i] = phy_reg << 16;
751 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
752 phy_reg = mdiobus_read(bus, addr, reg_addr);
755 c45_ids->device_ids[i] |= phy_reg;
762 * get_phy_id - reads the specified addr for its ID.
763 * @bus: the target MII bus
764 * @addr: PHY address on the MII bus
765 * @phy_id: where to store the ID retrieved.
766 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
767 * @c45_ids: where to store the c45 ID information.
769 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
770 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
773 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
774 * its return value is in turn returned.
777 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
778 bool is_c45, struct phy_c45_device_ids *c45_ids)
783 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
785 /* Grab the bits from PHYIR1, and put them in the upper half */
786 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
788 /* returning -ENODEV doesn't stop bus scanning */
789 return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
792 *phy_id = phy_reg << 16;
794 /* Grab the bits from PHYIR2, and put them in the lower half */
795 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
805 * get_phy_device - reads the specified PHY device and returns its @phy_device
807 * @bus: the target MII bus
808 * @addr: PHY address on the MII bus
809 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
811 * Description: Reads the ID registers of the PHY at @addr on the
812 * @bus, then allocates and returns the phy_device to represent it.
814 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
816 struct phy_c45_device_ids c45_ids;
820 c45_ids.devices_in_package = 0;
821 memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
823 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
827 /* If the phy_id is mostly Fs, there is no device there */
828 if ((phy_id & 0x1fffffff) == 0x1fffffff)
829 return ERR_PTR(-ENODEV);
831 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
833 EXPORT_SYMBOL(get_phy_device);
836 * phy_device_register - Register the phy device on the MDIO bus
837 * @phydev: phy_device structure to be added to the MDIO bus
839 int phy_device_register(struct phy_device *phydev)
843 err = mdiobus_register_device(&phydev->mdio);
847 /* Deassert the reset signal */
848 phy_device_reset(phydev, 0);
850 /* Run all of the fixups for this PHY */
851 err = phy_scan_fixups(phydev);
853 phydev_err(phydev, "failed to initialize\n");
857 err = device_add(&phydev->mdio.dev);
859 phydev_err(phydev, "failed to add\n");
866 /* Assert the reset signal */
867 phy_device_reset(phydev, 1);
869 mdiobus_unregister_device(&phydev->mdio);
872 EXPORT_SYMBOL(phy_device_register);
875 * phy_device_remove - Remove a previously registered phy device from the MDIO bus
876 * @phydev: phy_device structure to remove
878 * This doesn't free the phy_device itself, it merely reverses the effects
879 * of phy_device_register(). Use phy_device_free() to free the device
880 * after calling this function.
882 void phy_device_remove(struct phy_device *phydev)
884 device_del(&phydev->mdio.dev);
886 /* Assert the reset signal */
887 phy_device_reset(phydev, 1);
889 mdiobus_unregister_device(&phydev->mdio);
891 EXPORT_SYMBOL(phy_device_remove);
894 * phy_find_first - finds the first PHY device on the bus
895 * @bus: the target MII bus
897 struct phy_device *phy_find_first(struct mii_bus *bus)
899 struct phy_device *phydev;
902 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
903 phydev = mdiobus_get_phy(bus, addr);
909 EXPORT_SYMBOL(phy_find_first);
911 static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
913 struct net_device *netdev = phydev->attached_dev;
917 netif_carrier_on(netdev);
919 netif_carrier_off(netdev);
921 phydev->adjust_link(netdev);
925 * phy_prepare_link - prepares the PHY layer to monitor link status
926 * @phydev: target phy_device struct
927 * @handler: callback function for link status change notifications
929 * Description: Tells the PHY infrastructure to handle the
930 * gory details on monitoring link status (whether through
931 * polling or an interrupt), and to call back to the
932 * connected device driver when the link status changes.
933 * If you want to monitor your own link state, don't call
936 static void phy_prepare_link(struct phy_device *phydev,
937 void (*handler)(struct net_device *))
939 phydev->adjust_link = handler;
943 * phy_connect_direct - connect an ethernet device to a specific phy_device
944 * @dev: the network device to connect
945 * @phydev: the pointer to the phy device
946 * @handler: callback function for state change notifications
947 * @interface: PHY device's interface
949 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
950 void (*handler)(struct net_device *),
951 phy_interface_t interface)
958 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
962 phy_prepare_link(phydev, handler);
963 if (phy_interrupt_is_valid(phydev))
964 phy_request_interrupt(phydev);
968 EXPORT_SYMBOL(phy_connect_direct);
971 * phy_connect - connect an ethernet device to a PHY device
972 * @dev: the network device to connect
973 * @bus_id: the id string of the PHY device to connect
974 * @handler: callback function for state change notifications
975 * @interface: PHY device's interface
977 * Description: Convenience function for connecting ethernet
978 * devices to PHY devices. The default behavior is for
979 * the PHY infrastructure to handle everything, and only notify
980 * the connected driver when the link status changes. If you
981 * don't want, or can't use the provided functionality, you may
982 * choose to call only the subset of functions which provide
983 * the desired functionality.
985 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
986 void (*handler)(struct net_device *),
987 phy_interface_t interface)
989 struct phy_device *phydev;
993 /* Search the list of PHY devices on the mdio bus for the
994 * PHY with the requested name
996 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
998 pr_err("PHY %s not found\n", bus_id);
999 return ERR_PTR(-ENODEV);
1001 phydev = to_phy_device(d);
1003 rc = phy_connect_direct(dev, phydev, handler, interface);
1010 EXPORT_SYMBOL(phy_connect);
1013 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
1015 * @phydev: target phy_device struct
1017 void phy_disconnect(struct phy_device *phydev)
1019 if (phy_is_started(phydev))
1022 if (phy_interrupt_is_valid(phydev))
1023 phy_free_interrupt(phydev);
1025 phydev->adjust_link = NULL;
1029 EXPORT_SYMBOL(phy_disconnect);
1032 * phy_poll_reset - Safely wait until a PHY reset has properly completed
1033 * @phydev: The PHY device to poll
1035 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
1036 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
1037 * register must be polled until the BMCR_RESET bit clears.
1039 * Furthermore, any attempts to write to PHY registers may have no effect
1040 * or even generate MDIO bus errors until this is complete.
1042 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
1043 * standard and do not fully reset after the BMCR_RESET bit is set, and may
1044 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
1045 * effort to support such broken PHYs, this function is separate from the
1046 * standard phy_init_hw() which will zero all the other bits in the BMCR
1047 * and reapply all driver-specific and board-specific fixups.
1049 static int phy_poll_reset(struct phy_device *phydev)
1051 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
1052 unsigned int retries = 12;
1057 ret = phy_read(phydev, MII_BMCR);
1060 } while (ret & BMCR_RESET && --retries);
1061 if (ret & BMCR_RESET)
1064 /* Some chips (smsc911x) may still need up to another 1ms after the
1065 * BMCR_RESET bit is cleared before they are usable.
1071 int phy_init_hw(struct phy_device *phydev)
1075 /* Deassert the reset signal */
1076 phy_device_reset(phydev, 0);
1081 if (phydev->drv->soft_reset)
1082 ret = phydev->drv->soft_reset(phydev);
1087 ret = phy_scan_fixups(phydev);
1091 if (phydev->drv->config_init)
1092 ret = phydev->drv->config_init(phydev);
1096 EXPORT_SYMBOL(phy_init_hw);
1098 void phy_attached_info(struct phy_device *phydev)
1100 phy_attached_print(phydev, NULL);
1102 EXPORT_SYMBOL(phy_attached_info);
1104 #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
1105 void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
1107 const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
1111 switch(phydev->irq) {
1115 case PHY_IGNORE_INTERRUPT:
1119 snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
1126 phydev_info(phydev, ATTACHED_FMT "\n",
1127 drv_name, phydev_name(phydev),
1132 phydev_info(phydev, ATTACHED_FMT,
1133 drv_name, phydev_name(phydev),
1141 EXPORT_SYMBOL(phy_attached_print);
1143 static void phy_sysfs_create_links(struct phy_device *phydev)
1145 struct net_device *dev = phydev->attached_dev;
1151 err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
1156 err = sysfs_create_link_nowarn(&dev->dev.kobj,
1157 &phydev->mdio.dev.kobj,
1160 dev_err(&dev->dev, "could not add device link to %s err %d\n",
1161 kobject_name(&phydev->mdio.dev.kobj),
1163 /* non-fatal - some net drivers can use one netdevice
1164 * with more then one phy
1168 phydev->sysfs_links = true;
1172 phy_standalone_show(struct device *dev, struct device_attribute *attr,
1175 struct phy_device *phydev = to_phy_device(dev);
1177 return sprintf(buf, "%d\n", !phydev->attached_dev);
1179 static DEVICE_ATTR_RO(phy_standalone);
1182 * phy_sfp_attach - attach the SFP bus to the PHY upstream network device
1183 * @upstream: pointer to the phy device
1184 * @bus: sfp bus representing cage being attached
1186 * This is used to fill in the sfp_upstream_ops .attach member.
1188 void phy_sfp_attach(void *upstream, struct sfp_bus *bus)
1190 struct phy_device *phydev = upstream;
1192 if (phydev->attached_dev)
1193 phydev->attached_dev->sfp_bus = bus;
1194 phydev->sfp_bus_attached = true;
1196 EXPORT_SYMBOL(phy_sfp_attach);
1199 * phy_sfp_detach - detach the SFP bus from the PHY upstream network device
1200 * @upstream: pointer to the phy device
1201 * @bus: sfp bus representing cage being attached
1203 * This is used to fill in the sfp_upstream_ops .detach member.
1205 void phy_sfp_detach(void *upstream, struct sfp_bus *bus)
1207 struct phy_device *phydev = upstream;
1209 if (phydev->attached_dev)
1210 phydev->attached_dev->sfp_bus = NULL;
1211 phydev->sfp_bus_attached = false;
1213 EXPORT_SYMBOL(phy_sfp_detach);
1216 * phy_sfp_probe - probe for a SFP cage attached to this PHY device
1217 * @phydev: Pointer to phy_device
1218 * @ops: SFP's upstream operations
1220 int phy_sfp_probe(struct phy_device *phydev,
1221 const struct sfp_upstream_ops *ops)
1223 struct sfp_bus *bus;
1226 if (phydev->mdio.dev.fwnode) {
1227 bus = sfp_bus_find_fwnode(phydev->mdio.dev.fwnode);
1229 return PTR_ERR(bus);
1231 phydev->sfp_bus = bus;
1233 ret = sfp_bus_add_upstream(bus, phydev, ops);
1238 EXPORT_SYMBOL(phy_sfp_probe);
1241 * phy_attach_direct - attach a network device to a given PHY device pointer
1242 * @dev: network device to attach
1243 * @phydev: Pointer to phy_device to attach
1244 * @flags: PHY device's dev_flags
1245 * @interface: PHY device's interface
1247 * Description: Called by drivers to attach to a particular PHY
1248 * device. The phy_device is found, and properly hooked up
1249 * to the phy_driver. If no driver is attached, then a
1250 * generic driver is used. The phy_device is given a ptr to
1251 * the attaching device, and given a callback for link status
1252 * change. The phy_device is returned to the attaching driver.
1253 * This function takes a reference on the phy device.
1255 int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
1256 u32 flags, phy_interface_t interface)
1258 struct mii_bus *bus = phydev->mdio.bus;
1259 struct device *d = &phydev->mdio.dev;
1260 struct module *ndev_owner = NULL;
1261 bool using_genphy = false;
1264 /* For Ethernet device drivers that register their own MDIO bus, we
1265 * will have bus->owner match ndev_mod, so we do not want to increment
1266 * our own module->refcnt here, otherwise we would not be able to
1270 ndev_owner = dev->dev.parent->driver->owner;
1271 if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
1272 phydev_err(phydev, "failed to get the bus module\n");
1278 /* Assume that if there is no driver, that it doesn't
1279 * exist, and we should use the genphy driver.
1283 d->driver = &genphy_c45_driver.mdiodrv.driver;
1285 d->driver = &genphy_driver.mdiodrv.driver;
1287 using_genphy = true;
1290 if (!try_module_get(d->driver->owner)) {
1291 phydev_err(phydev, "failed to get the device driver module\n");
1293 goto error_put_device;
1297 err = d->driver->probe(d);
1299 err = device_bind_driver(d);
1302 goto error_module_put;
1305 if (phydev->attached_dev) {
1306 dev_err(&dev->dev, "PHY already attached\n");
1311 phydev->phy_link_change = phy_link_change;
1313 phydev->attached_dev = dev;
1314 dev->phydev = phydev;
1316 if (phydev->sfp_bus_attached)
1317 dev->sfp_bus = phydev->sfp_bus;
1320 /* Some Ethernet drivers try to connect to a PHY device before
1321 * calling register_netdevice() -> netdev_register_kobject() and
1322 * does the dev->dev.kobj initialization. Here we only check for
1323 * success which indicates that the network device kobject is
1324 * ready. Once we do that we still need to keep track of whether
1325 * links were successfully set up or not for phy_detach() to
1326 * remove them accordingly.
1328 phydev->sysfs_links = false;
1330 phy_sysfs_create_links(phydev);
1332 if (!phydev->attached_dev) {
1333 err = sysfs_create_file(&phydev->mdio.dev.kobj,
1334 &dev_attr_phy_standalone.attr);
1336 phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
1339 phydev->dev_flags |= flags;
1341 phydev->interface = interface;
1343 phydev->state = PHY_READY;
1345 /* Initial carrier state is off as the phy is about to be
1349 netif_carrier_off(phydev->attached_dev);
1351 /* Do initial configuration here, now that
1352 * we have certain key parameters
1353 * (dev_flags and interface)
1355 err = phy_init_hw(phydev);
1360 phy_led_triggers_register(phydev);
1365 /* phy_detach() does all of the cleanup below */
1370 module_put(d->driver->owner);
1373 if (ndev_owner != bus->owner)
1374 module_put(bus->owner);
1377 EXPORT_SYMBOL(phy_attach_direct);
1380 * phy_attach - attach a network device to a particular PHY device
1381 * @dev: network device to attach
1382 * @bus_id: Bus ID of PHY device to attach
1383 * @interface: PHY device's interface
1385 * Description: Same as phy_attach_direct() except that a PHY bus_id
1386 * string is passed instead of a pointer to a struct phy_device.
1388 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
1389 phy_interface_t interface)
1391 struct bus_type *bus = &mdio_bus_type;
1392 struct phy_device *phydev;
1397 return ERR_PTR(-EINVAL);
1399 /* Search the list of PHY devices on the mdio bus for the
1400 * PHY with the requested name
1402 d = bus_find_device_by_name(bus, NULL, bus_id);
1404 pr_err("PHY %s not found\n", bus_id);
1405 return ERR_PTR(-ENODEV);
1407 phydev = to_phy_device(d);
1409 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
1416 EXPORT_SYMBOL(phy_attach);
1418 static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
1419 struct device_driver *driver)
1421 struct device *d = &phydev->mdio.dev;
1428 ret = d->driver == driver;
1434 bool phy_driver_is_genphy(struct phy_device *phydev)
1436 return phy_driver_is_genphy_kind(phydev,
1437 &genphy_driver.mdiodrv.driver);
1439 EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
1441 bool phy_driver_is_genphy_10g(struct phy_device *phydev)
1443 return phy_driver_is_genphy_kind(phydev,
1444 &genphy_c45_driver.mdiodrv.driver);
1446 EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
1449 * phy_detach - detach a PHY device from its network device
1450 * @phydev: target phy_device struct
1452 * This detaches the phy device from its network device and the phy
1453 * driver, and drops the reference count taken in phy_attach_direct().
1455 void phy_detach(struct phy_device *phydev)
1457 struct net_device *dev = phydev->attached_dev;
1458 struct module *ndev_owner = NULL;
1459 struct mii_bus *bus;
1461 if (phydev->sysfs_links) {
1463 sysfs_remove_link(&dev->dev.kobj, "phydev");
1464 sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
1467 if (!phydev->attached_dev)
1468 sysfs_remove_file(&phydev->mdio.dev.kobj,
1469 &dev_attr_phy_standalone.attr);
1471 phy_suspend(phydev);
1473 phydev->attached_dev->phydev = NULL;
1474 phydev->attached_dev = NULL;
1476 phydev->phylink = NULL;
1478 phy_led_triggers_unregister(phydev);
1480 module_put(phydev->mdio.dev.driver->owner);
1482 /* If the device had no specific driver before (i.e. - it
1483 * was using the generic driver), we unbind the device
1484 * from the generic driver so that there's a chance a
1485 * real driver could be loaded
1487 if (phy_driver_is_genphy(phydev) ||
1488 phy_driver_is_genphy_10g(phydev))
1489 device_release_driver(&phydev->mdio.dev);
1492 * The phydev might go away on the put_device() below, so avoid
1493 * a use-after-free bug by reading the underlying bus first.
1495 bus = phydev->mdio.bus;
1497 put_device(&phydev->mdio.dev);
1499 ndev_owner = dev->dev.parent->driver->owner;
1500 if (ndev_owner != bus->owner)
1501 module_put(bus->owner);
1503 /* Assert the reset signal */
1504 phy_device_reset(phydev, 1);
1506 EXPORT_SYMBOL(phy_detach);
1508 int phy_suspend(struct phy_device *phydev)
1510 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1511 struct net_device *netdev = phydev->attached_dev;
1512 struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1515 /* If the device has WOL enabled, we cannot suspend the PHY */
1516 phy_ethtool_get_wol(phydev, &wol);
1517 if (wol.wolopts || (netdev && netdev->wol_enabled))
1520 if (phydev->drv && phydrv->suspend)
1521 ret = phydrv->suspend(phydev);
1526 phydev->suspended = true;
1530 EXPORT_SYMBOL(phy_suspend);
1532 int __phy_resume(struct phy_device *phydev)
1534 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1537 WARN_ON(!mutex_is_locked(&phydev->lock));
1539 if (phydev->drv && phydrv->resume)
1540 ret = phydrv->resume(phydev);
1545 phydev->suspended = false;
1549 EXPORT_SYMBOL(__phy_resume);
1551 int phy_resume(struct phy_device *phydev)
1555 mutex_lock(&phydev->lock);
1556 ret = __phy_resume(phydev);
1557 mutex_unlock(&phydev->lock);
1561 EXPORT_SYMBOL(phy_resume);
1563 int phy_loopback(struct phy_device *phydev, bool enable)
1565 struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
1568 mutex_lock(&phydev->lock);
1570 if (enable && phydev->loopback_enabled) {
1575 if (!enable && !phydev->loopback_enabled) {
1580 if (phydev->drv && phydrv->set_loopback)
1581 ret = phydrv->set_loopback(phydev, enable);
1588 phydev->loopback_enabled = enable;
1591 mutex_unlock(&phydev->lock);
1594 EXPORT_SYMBOL(phy_loopback);
1597 * phy_reset_after_clk_enable - perform a PHY reset if needed
1598 * @phydev: target phy_device struct
1600 * Description: Some PHYs are known to need a reset after their refclk was
1601 * enabled. This function evaluates the flags and perform the reset if it's
1602 * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
1605 int phy_reset_after_clk_enable(struct phy_device *phydev)
1607 if (!phydev || !phydev->drv)
1610 if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
1611 phy_device_reset(phydev, 1);
1612 phy_device_reset(phydev, 0);
1618 EXPORT_SYMBOL(phy_reset_after_clk_enable);
1620 /* Generic PHY support and helper functions */
1623 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
1624 * @phydev: target phy_device struct
1626 * Description: Writes MII_ADVERTISE with the appropriate values,
1627 * after sanitizing the values to make sure we only advertise
1628 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1629 * hasn't changed, and > 0 if it has changed.
1631 static int genphy_config_advert(struct phy_device *phydev)
1633 int err, bmsr, changed = 0;
1636 /* Only allow advertising what this PHY supports */
1637 linkmode_and(phydev->advertising, phydev->advertising,
1640 adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
1642 /* Setup standard advertisement */
1643 err = phy_modify_changed(phydev, MII_ADVERTISE,
1644 ADVERTISE_ALL | ADVERTISE_100BASE4 |
1645 ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
1652 bmsr = phy_read(phydev, MII_BMSR);
1656 /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
1657 * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
1660 if (!(bmsr & BMSR_ESTATEN))
1663 adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
1665 err = phy_modify_changed(phydev, MII_CTRL1000,
1666 ADVERTISE_1000FULL | ADVERTISE_1000HALF,
1677 * genphy_c37_config_advert - sanitize and advertise auto-negotiation parameters
1678 * @phydev: target phy_device struct
1680 * Description: Writes MII_ADVERTISE with the appropriate values,
1681 * after sanitizing the values to make sure we only advertise
1682 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
1683 * hasn't changed, and > 0 if it has changed. This function is intended
1684 * for Clause 37 1000Base-X mode.
1686 static int genphy_c37_config_advert(struct phy_device *phydev)
1690 /* Only allow advertising what this PHY supports */
1691 linkmode_and(phydev->advertising, phydev->advertising,
1694 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
1695 phydev->advertising))
1696 adv |= ADVERTISE_1000XFULL;
1697 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
1698 phydev->advertising))
1699 adv |= ADVERTISE_1000XPAUSE;
1700 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
1701 phydev->advertising))
1702 adv |= ADVERTISE_1000XPSE_ASYM;
1704 return phy_modify_changed(phydev, MII_ADVERTISE,
1705 ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
1706 ADVERTISE_1000XHALF | ADVERTISE_1000XPSE_ASYM,
1711 * genphy_config_eee_advert - disable unwanted eee mode advertisement
1712 * @phydev: target phy_device struct
1714 * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
1715 * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
1716 * changed, and 1 if it has changed.
1718 int genphy_config_eee_advert(struct phy_device *phydev)
1722 /* Nothing to disable */
1723 if (!phydev->eee_broken_modes)
1726 err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
1727 phydev->eee_broken_modes, 0);
1728 /* If the call failed, we assume that EEE is not supported */
1729 return err < 0 ? 0 : err;
1731 EXPORT_SYMBOL(genphy_config_eee_advert);
1734 * genphy_setup_forced - configures/forces speed/duplex from @phydev
1735 * @phydev: target phy_device struct
1737 * Description: Configures MII_BMCR to force speed/duplex
1738 * to the values in phydev. Assumes that the values are valid.
1739 * Please see phy_sanitize_settings().
1741 int genphy_setup_forced(struct phy_device *phydev)
1746 phydev->asym_pause = 0;
1748 if (SPEED_1000 == phydev->speed)
1749 ctl |= BMCR_SPEED1000;
1750 else if (SPEED_100 == phydev->speed)
1751 ctl |= BMCR_SPEED100;
1753 if (DUPLEX_FULL == phydev->duplex)
1754 ctl |= BMCR_FULLDPLX;
1756 return phy_modify(phydev, MII_BMCR,
1757 ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
1759 EXPORT_SYMBOL(genphy_setup_forced);
1762 * genphy_restart_aneg - Enable and Restart Autonegotiation
1763 * @phydev: target phy_device struct
1765 int genphy_restart_aneg(struct phy_device *phydev)
1767 /* Don't isolate the PHY if we're negotiating */
1768 return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
1769 BMCR_ANENABLE | BMCR_ANRESTART);
1771 EXPORT_SYMBOL(genphy_restart_aneg);
1774 * __genphy_config_aneg - restart auto-negotiation or write BMCR
1775 * @phydev: target phy_device struct
1776 * @changed: whether autoneg is requested
1778 * Description: If auto-negotiation is enabled, we configure the
1779 * advertising, and then restart auto-negotiation. If it is not
1780 * enabled, then we write the BMCR.
1782 int __genphy_config_aneg(struct phy_device *phydev, bool changed)
1786 if (genphy_config_eee_advert(phydev))
1789 if (AUTONEG_ENABLE != phydev->autoneg)
1790 return genphy_setup_forced(phydev);
1792 err = genphy_config_advert(phydev);
1793 if (err < 0) /* error */
1799 /* Advertisement hasn't changed, but maybe aneg was never on to
1800 * begin with? Or maybe phy was isolated?
1802 int ctl = phy_read(phydev, MII_BMCR);
1807 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1808 changed = true; /* do restart aneg */
1811 /* Only restart aneg if we are advertising something different
1812 * than we were before.
1814 return changed ? genphy_restart_aneg(phydev) : 0;
1816 EXPORT_SYMBOL(__genphy_config_aneg);
1819 * genphy_c37_config_aneg - restart auto-negotiation or write BMCR
1820 * @phydev: target phy_device struct
1822 * Description: If auto-negotiation is enabled, we configure the
1823 * advertising, and then restart auto-negotiation. If it is not
1824 * enabled, then we write the BMCR. This function is intended
1825 * for use with Clause 37 1000Base-X mode.
1827 int genphy_c37_config_aneg(struct phy_device *phydev)
1831 if (phydev->autoneg != AUTONEG_ENABLE)
1832 return genphy_setup_forced(phydev);
1834 err = phy_modify(phydev, MII_BMCR, BMCR_SPEED1000 | BMCR_SPEED100,
1839 changed = genphy_c37_config_advert(phydev);
1840 if (changed < 0) /* error */
1844 /* Advertisement hasn't changed, but maybe aneg was never on to
1845 * begin with? Or maybe phy was isolated?
1847 int ctl = phy_read(phydev, MII_BMCR);
1852 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
1853 changed = 1; /* do restart aneg */
1856 /* Only restart aneg if we are advertising something different
1857 * than we were before.
1860 return genphy_restart_aneg(phydev);
1864 EXPORT_SYMBOL(genphy_c37_config_aneg);
1867 * genphy_aneg_done - return auto-negotiation status
1868 * @phydev: target phy_device struct
1870 * Description: Reads the status register and returns 0 either if
1871 * auto-negotiation is incomplete, or if there was an error.
1872 * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
1874 int genphy_aneg_done(struct phy_device *phydev)
1876 int retval = phy_read(phydev, MII_BMSR);
1878 return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
1880 EXPORT_SYMBOL(genphy_aneg_done);
1883 * genphy_update_link - update link status in @phydev
1884 * @phydev: target phy_device struct
1886 * Description: Update the value in phydev->link to reflect the
1887 * current link value. In order to do this, we need to read
1888 * the status register twice, keeping the second value.
1890 int genphy_update_link(struct phy_device *phydev)
1892 int status = 0, bmcr;
1894 bmcr = phy_read(phydev, MII_BMCR);
1898 /* Autoneg is being started, therefore disregard BMSR value and
1899 * report link as down.
1901 if (bmcr & BMCR_ANRESTART)
1904 /* The link state is latched low so that momentary link
1905 * drops can be detected. Do not double-read the status
1906 * in polling mode to detect such short link drops.
1908 if (!phy_polling_mode(phydev)) {
1909 status = phy_read(phydev, MII_BMSR);
1912 else if (status & BMSR_LSTATUS)
1916 /* Read link and autonegotiation status */
1917 status = phy_read(phydev, MII_BMSR);
1921 phydev->link = status & BMSR_LSTATUS ? 1 : 0;
1922 phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
1924 /* Consider the case that autoneg was started and "aneg complete"
1925 * bit has been reset, but "link up" bit not yet.
1927 if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
1932 EXPORT_SYMBOL(genphy_update_link);
1934 int genphy_read_lpa(struct phy_device *phydev)
1938 if (phydev->autoneg == AUTONEG_ENABLE) {
1939 if (!phydev->autoneg_complete) {
1940 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
1942 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
1946 if (phydev->is_gigabit_capable) {
1947 lpagb = phy_read(phydev, MII_STAT1000);
1951 if (lpagb & LPA_1000MSFAIL) {
1952 int adv = phy_read(phydev, MII_CTRL1000);
1957 if (adv & CTL1000_ENABLE_MASTER)
1958 phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
1960 phydev_err(phydev, "Master/Slave resolution failed\n");
1964 mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
1968 lpa = phy_read(phydev, MII_LPA);
1972 mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
1974 linkmode_zero(phydev->lp_advertising);
1979 EXPORT_SYMBOL(genphy_read_lpa);
1982 * genphy_read_status - check the link status and update current link state
1983 * @phydev: target phy_device struct
1985 * Description: Check the link, then figure out the current state
1986 * by comparing what we advertise with what the link partner
1987 * advertises. Start by checking the gigabit possibilities,
1988 * then move on to 10/100.
1990 int genphy_read_status(struct phy_device *phydev)
1992 int err, old_link = phydev->link;
1994 /* Update the link, but return if there was an error */
1995 err = genphy_update_link(phydev);
1999 /* why bother the PHY if nothing can have changed */
2000 if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
2003 phydev->speed = SPEED_UNKNOWN;
2004 phydev->duplex = DUPLEX_UNKNOWN;
2006 phydev->asym_pause = 0;
2008 err = genphy_read_lpa(phydev);
2012 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2013 phy_resolve_aneg_linkmode(phydev);
2014 } else if (phydev->autoneg == AUTONEG_DISABLE) {
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;
2035 EXPORT_SYMBOL(genphy_read_status);
2038 * genphy_c37_read_status - check the link status and update current link state
2039 * @phydev: target phy_device struct
2041 * Description: Check the link, then figure out the current state
2042 * by comparing what we advertise with what the link partner
2043 * advertises. This function is for Clause 37 1000Base-X mode.
2045 int genphy_c37_read_status(struct phy_device *phydev)
2047 int lpa, 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->duplex = DUPLEX_UNKNOWN;
2060 phydev->asym_pause = 0;
2062 if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
2063 lpa = phy_read(phydev, MII_LPA);
2067 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2068 phydev->lp_advertising, lpa & LPA_LPACK);
2069 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2070 phydev->lp_advertising, lpa & LPA_1000XFULL);
2071 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2072 phydev->lp_advertising, lpa & LPA_1000XPAUSE);
2073 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2074 phydev->lp_advertising,
2075 lpa & LPA_1000XPAUSE_ASYM);
2077 phy_resolve_aneg_linkmode(phydev);
2078 } else if (phydev->autoneg == AUTONEG_DISABLE) {
2079 int bmcr = phy_read(phydev, MII_BMCR);
2084 if (bmcr & BMCR_FULLDPLX)
2085 phydev->duplex = DUPLEX_FULL;
2087 phydev->duplex = DUPLEX_HALF;
2092 EXPORT_SYMBOL(genphy_c37_read_status);
2095 * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
2096 * @phydev: target phy_device struct
2098 * Description: Perform a software PHY reset using the standard
2099 * BMCR_RESET bit and poll for the reset bit to be cleared.
2101 * Returns: 0 on success, < 0 on failure
2103 int genphy_soft_reset(struct phy_device *phydev)
2105 u16 res = BMCR_RESET;
2108 if (phydev->autoneg == AUTONEG_ENABLE)
2109 res |= BMCR_ANRESTART;
2111 ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
2115 ret = phy_poll_reset(phydev);
2119 /* BMCR may be reset to defaults */
2120 if (phydev->autoneg == AUTONEG_DISABLE)
2121 ret = genphy_setup_forced(phydev);
2125 EXPORT_SYMBOL(genphy_soft_reset);
2128 * genphy_read_abilities - read PHY abilities from Clause 22 registers
2129 * @phydev: target phy_device struct
2131 * Description: Reads the PHY's abilities and populates
2132 * phydev->supported accordingly.
2134 * Returns: 0 on success, < 0 on failure
2136 int genphy_read_abilities(struct phy_device *phydev)
2140 linkmode_set_bit_array(phy_basic_ports_array,
2141 ARRAY_SIZE(phy_basic_ports_array),
2144 val = phy_read(phydev, MII_BMSR);
2148 linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
2149 val & BMSR_ANEGCAPABLE);
2151 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
2152 val & BMSR_100FULL);
2153 linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
2154 val & BMSR_100HALF);
2155 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
2157 linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
2160 if (val & BMSR_ESTATEN) {
2161 val = phy_read(phydev, MII_ESTATUS);
2165 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2166 phydev->supported, val & ESTATUS_1000_TFULL);
2167 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2168 phydev->supported, val & ESTATUS_1000_THALF);
2169 linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
2170 phydev->supported, val & ESTATUS_1000_XFULL);
2175 EXPORT_SYMBOL(genphy_read_abilities);
2177 /* This is used for the phy device which doesn't support the MMD extended
2178 * register access, but it does have side effect when we are trying to access
2179 * the MMD register via indirect method.
2181 int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
2185 EXPORT_SYMBOL(genphy_read_mmd_unsupported);
2187 int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
2188 u16 regnum, u16 val)
2192 EXPORT_SYMBOL(genphy_write_mmd_unsupported);
2194 int genphy_suspend(struct phy_device *phydev)
2196 return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
2198 EXPORT_SYMBOL(genphy_suspend);
2200 int genphy_resume(struct phy_device *phydev)
2202 return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
2204 EXPORT_SYMBOL(genphy_resume);
2206 int genphy_loopback(struct phy_device *phydev, bool enable)
2208 return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
2209 enable ? BMCR_LOOPBACK : 0);
2211 EXPORT_SYMBOL(genphy_loopback);
2214 * phy_remove_link_mode - Remove a supported link mode
2215 * @phydev: phy_device structure to remove link mode from
2216 * @link_mode: Link mode to be removed
2218 * Description: Some MACs don't support all link modes which the PHY
2219 * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
2220 * to remove a link mode.
2222 void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
2224 linkmode_clear_bit(link_mode, phydev->supported);
2225 phy_advertise_supported(phydev);
2227 EXPORT_SYMBOL(phy_remove_link_mode);
2229 static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
2231 linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
2232 linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
2233 linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
2234 linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
2238 * phy_advertise_supported - Advertise all supported modes
2239 * @phydev: target phy_device struct
2241 * Description: Called to advertise all supported modes, doesn't touch
2242 * pause mode advertising.
2244 void phy_advertise_supported(struct phy_device *phydev)
2246 __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
2248 linkmode_copy(new, phydev->supported);
2249 phy_copy_pause_bits(new, phydev->advertising);
2250 linkmode_copy(phydev->advertising, new);
2252 EXPORT_SYMBOL(phy_advertise_supported);
2255 * phy_support_sym_pause - Enable support of symmetrical pause
2256 * @phydev: target phy_device struct
2258 * Description: Called by the MAC to indicate is supports symmetrical
2259 * Pause, but not asym pause.
2261 void phy_support_sym_pause(struct phy_device *phydev)
2263 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
2264 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2266 EXPORT_SYMBOL(phy_support_sym_pause);
2269 * phy_support_asym_pause - Enable support of asym pause
2270 * @phydev: target phy_device struct
2272 * Description: Called by the MAC to indicate is supports Asym Pause.
2274 void phy_support_asym_pause(struct phy_device *phydev)
2276 phy_copy_pause_bits(phydev->advertising, phydev->supported);
2278 EXPORT_SYMBOL(phy_support_asym_pause);
2281 * phy_set_sym_pause - Configure symmetric Pause
2282 * @phydev: target phy_device struct
2283 * @rx: Receiver Pause is supported
2284 * @tx: Transmit Pause is supported
2285 * @autoneg: Auto neg should be used
2287 * Description: Configure advertised Pause support depending on if
2288 * receiver pause and pause auto neg is supported. Generally called
2289 * from the set_pauseparam .ndo.
2291 void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
2294 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
2296 if (rx && tx && autoneg)
2297 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2300 linkmode_copy(phydev->advertising, phydev->supported);
2302 EXPORT_SYMBOL(phy_set_sym_pause);
2305 * phy_set_asym_pause - Configure Pause and Asym Pause
2306 * @phydev: target phy_device struct
2307 * @rx: Receiver Pause is supported
2308 * @tx: Transmit Pause is supported
2310 * Description: Configure advertised Pause support depending on if
2311 * transmit and receiver pause is supported. If there has been a
2312 * change in adverting, trigger a new autoneg. Generally called from
2313 * the set_pauseparam .ndo.
2315 void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
2317 __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
2319 linkmode_copy(oldadv, phydev->advertising);
2321 linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2322 phydev->advertising);
2323 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2324 phydev->advertising);
2327 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2328 phydev->advertising);
2329 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2330 phydev->advertising);
2334 linkmode_change_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2335 phydev->advertising);
2337 if (!linkmode_equal(oldadv, phydev->advertising) &&
2339 phy_start_aneg(phydev);
2341 EXPORT_SYMBOL(phy_set_asym_pause);
2344 * phy_validate_pause - Test if the PHY/MAC support the pause configuration
2345 * @phydev: phy_device struct
2346 * @pp: requested pause configuration
2348 * Description: Test if the PHY/MAC combination supports the Pause
2349 * configuration the user is requesting. Returns True if it is
2350 * supported, false otherwise.
2352 bool phy_validate_pause(struct phy_device *phydev,
2353 struct ethtool_pauseparam *pp)
2355 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2356 phydev->supported) && pp->rx_pause)
2359 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2360 phydev->supported) &&
2361 pp->rx_pause != pp->tx_pause)
2366 EXPORT_SYMBOL(phy_validate_pause);
2368 static bool phy_drv_supports_irq(struct phy_driver *phydrv)
2370 return phydrv->config_intr && phydrv->ack_interrupt;
2374 * phy_probe - probe and init a PHY device
2375 * @dev: device to probe and init
2377 * Description: Take care of setting up the phy_device structure,
2378 * set the state to READY (the driver's init function should
2379 * set it to STARTING if needed).
2381 static int phy_probe(struct device *dev)
2383 struct phy_device *phydev = to_phy_device(dev);
2384 struct device_driver *drv = phydev->mdio.dev.driver;
2385 struct phy_driver *phydrv = to_phy_driver(drv);
2388 phydev->drv = phydrv;
2390 /* Disable the interrupt if the PHY doesn't support it
2391 * but the interrupt is still a valid one
2393 if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
2394 phydev->irq = PHY_POLL;
2396 if (phydrv->flags & PHY_IS_INTERNAL)
2397 phydev->is_internal = true;
2399 mutex_lock(&phydev->lock);
2401 if (phydev->drv->probe) {
2402 /* Deassert the reset signal */
2403 phy_device_reset(phydev, 0);
2405 err = phydev->drv->probe(phydev);
2407 /* Assert the reset signal */
2408 phy_device_reset(phydev, 1);
2413 /* Start out supporting everything. Eventually,
2414 * a controller will attach, and may modify one
2415 * or both of these values
2417 if (phydrv->features) {
2418 linkmode_copy(phydev->supported, phydrv->features);
2419 } else if (phydrv->get_features) {
2420 err = phydrv->get_features(phydev);
2421 } else if (phydev->is_c45) {
2422 err = genphy_c45_pma_read_abilities(phydev);
2424 err = genphy_read_abilities(phydev);
2430 if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
2432 phydev->autoneg = 0;
2434 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
2436 phydev->is_gigabit_capable = 1;
2437 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
2439 phydev->is_gigabit_capable = 1;
2441 of_set_phy_supported(phydev);
2442 phy_advertise_supported(phydev);
2444 /* Get the EEE modes we want to prohibit. We will ask
2445 * the PHY stop advertising these mode later on
2447 of_set_phy_eee_broken(phydev);
2449 /* The Pause Frame bits indicate that the PHY can support passing
2450 * pause frames. During autonegotiation, the PHYs will determine if
2451 * they should allow pause frames to pass. The MAC driver should then
2452 * use that result to determine whether to enable flow control via
2455 * Normally, PHY drivers should not set the Pause bits, and instead
2456 * allow phylib to do that. However, there may be some situations
2457 * (e.g. hardware erratum) where the driver wants to set only one
2460 if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
2461 !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
2462 linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
2464 linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
2468 /* Set the state to READY by default */
2469 phydev->state = PHY_READY;
2472 mutex_unlock(&phydev->lock);
2477 static int phy_remove(struct device *dev)
2479 struct phy_device *phydev = to_phy_device(dev);
2481 cancel_delayed_work_sync(&phydev->state_queue);
2483 mutex_lock(&phydev->lock);
2484 phydev->state = PHY_DOWN;
2485 mutex_unlock(&phydev->lock);
2487 sfp_bus_del_upstream(phydev->sfp_bus);
2488 phydev->sfp_bus = NULL;
2490 if (phydev->drv && phydev->drv->remove) {
2491 phydev->drv->remove(phydev);
2493 /* Assert the reset signal */
2494 phy_device_reset(phydev, 1);
2502 * phy_driver_register - register a phy_driver with the PHY layer
2503 * @new_driver: new phy_driver to register
2504 * @owner: module owning this PHY
2506 int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
2510 /* Either the features are hard coded, or dynamically
2511 * determined. It cannot be both.
2513 if (WARN_ON(new_driver->features && new_driver->get_features)) {
2514 pr_err("%s: features and get_features must not both be set\n",
2519 new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
2520 new_driver->mdiodrv.driver.name = new_driver->name;
2521 new_driver->mdiodrv.driver.bus = &mdio_bus_type;
2522 new_driver->mdiodrv.driver.probe = phy_probe;
2523 new_driver->mdiodrv.driver.remove = phy_remove;
2524 new_driver->mdiodrv.driver.owner = owner;
2526 retval = driver_register(&new_driver->mdiodrv.driver);
2528 pr_err("%s: Error %d in registering driver\n",
2529 new_driver->name, retval);
2534 pr_debug("%s: Registered new driver\n", new_driver->name);
2538 EXPORT_SYMBOL(phy_driver_register);
2540 int phy_drivers_register(struct phy_driver *new_driver, int n,
2541 struct module *owner)
2545 for (i = 0; i < n; i++) {
2546 ret = phy_driver_register(new_driver + i, owner);
2549 phy_driver_unregister(new_driver + i);
2555 EXPORT_SYMBOL(phy_drivers_register);
2557 void phy_driver_unregister(struct phy_driver *drv)
2559 driver_unregister(&drv->mdiodrv.driver);
2561 EXPORT_SYMBOL(phy_driver_unregister);
2563 void phy_drivers_unregister(struct phy_driver *drv, int n)
2567 for (i = 0; i < n; i++)
2568 phy_driver_unregister(drv + i);
2570 EXPORT_SYMBOL(phy_drivers_unregister);
2572 static struct phy_driver genphy_driver = {
2573 .phy_id = 0xffffffff,
2574 .phy_id_mask = 0xffffffff,
2575 .name = "Generic PHY",
2576 .soft_reset = genphy_no_soft_reset,
2577 .get_features = genphy_read_abilities,
2578 .aneg_done = genphy_aneg_done,
2579 .suspend = genphy_suspend,
2580 .resume = genphy_resume,
2581 .set_loopback = genphy_loopback,
2584 static int __init phy_init(void)
2588 rc = mdio_bus_init();
2594 rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
2598 rc = phy_driver_register(&genphy_driver, THIS_MODULE);
2600 phy_driver_unregister(&genphy_c45_driver);
2608 static void __exit phy_exit(void)
2610 phy_driver_unregister(&genphy_c45_driver);
2611 phy_driver_unregister(&genphy_driver);
2615 subsys_initcall(phy_init);
2616 module_exit(phy_exit);