1 /* Framework for finding and configuring PHYs.
2 * Also contains generic PHY driver
6 * Copyright (c) 2004 Freescale Semiconductor, Inc.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
15 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17 #include <linux/kernel.h>
18 #include <linux/string.h>
19 #include <linux/errno.h>
20 #include <linux/unistd.h>
21 #include <linux/slab.h>
22 #include <linux/interrupt.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/netdevice.h>
26 #include <linux/etherdevice.h>
27 #include <linux/skbuff.h>
29 #include <linux/module.h>
30 #include <linux/mii.h>
31 #include <linux/ethtool.h>
32 #include <linux/phy.h>
34 #include <linux/uaccess.h>
38 MODULE_DESCRIPTION("PHY library");
39 MODULE_AUTHOR("Andy Fleming");
40 MODULE_LICENSE("GPL");
42 void phy_device_free(struct phy_device *phydev)
44 put_device(&phydev->dev);
46 EXPORT_SYMBOL(phy_device_free);
48 static void phy_device_release(struct device *dev)
50 kfree(to_phy_device(dev));
53 static struct phy_driver genphy_driver;
55 static LIST_HEAD(phy_fixup_list);
56 static DEFINE_MUTEX(phy_fixup_lock);
58 static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
59 u32 flags, phy_interface_t interface);
62 * phy_register_fixup - creates a new phy_fixup and adds it to the list
63 * @bus_id: A string which matches phydev->dev.bus_id (or PHY_ANY_ID)
64 * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
65 * It can also be PHY_ANY_UID
66 * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
68 * @run: The actual code to be run when a matching PHY is found
70 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
71 int (*run)(struct phy_device *))
73 struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
78 strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
79 fixup->phy_uid = phy_uid;
80 fixup->phy_uid_mask = phy_uid_mask;
83 mutex_lock(&phy_fixup_lock);
84 list_add_tail(&fixup->list, &phy_fixup_list);
85 mutex_unlock(&phy_fixup_lock);
89 EXPORT_SYMBOL(phy_register_fixup);
91 /* Registers a fixup to be run on any PHY with the UID in phy_uid */
92 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
93 int (*run)(struct phy_device *))
95 return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
97 EXPORT_SYMBOL(phy_register_fixup_for_uid);
99 /* Registers a fixup to be run on the PHY with id string bus_id */
100 int phy_register_fixup_for_id(const char *bus_id,
101 int (*run)(struct phy_device *))
103 return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
105 EXPORT_SYMBOL(phy_register_fixup_for_id);
107 /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
108 * Fixups can be set to match any in one or more fields.
110 static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
112 if (strcmp(fixup->bus_id, dev_name(&phydev->dev)) != 0)
113 if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
116 if ((fixup->phy_uid & fixup->phy_uid_mask) !=
117 (phydev->phy_id & fixup->phy_uid_mask))
118 if (fixup->phy_uid != PHY_ANY_UID)
124 /* Runs any matching fixups for this phydev */
125 int phy_scan_fixups(struct phy_device *phydev)
127 struct phy_fixup *fixup;
129 mutex_lock(&phy_fixup_lock);
130 list_for_each_entry(fixup, &phy_fixup_list, list) {
131 if (phy_needs_fixup(phydev, fixup)) {
132 int err = fixup->run(phydev);
135 mutex_unlock(&phy_fixup_lock);
140 mutex_unlock(&phy_fixup_lock);
144 EXPORT_SYMBOL(phy_scan_fixups);
146 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
148 struct phy_c45_device_ids *c45_ids)
150 struct phy_device *dev;
152 /* We allocate the device, and initialize the default values */
153 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
155 return (struct phy_device *)PTR_ERR((void *)-ENOMEM);
157 dev->dev.release = phy_device_release;
164 dev->interface = PHY_INTERFACE_MODE_GMII;
166 dev->autoneg = AUTONEG_ENABLE;
168 dev->is_c45 = is_c45;
170 dev->phy_id = phy_id;
172 dev->c45_ids = *c45_ids;
174 dev->dev.parent = bus->parent;
175 dev->dev.bus = &mdio_bus_type;
176 dev->irq = bus->irq != NULL ? bus->irq[addr] : PHY_POLL;
177 dev_set_name(&dev->dev, PHY_ID_FMT, bus->id, addr);
179 dev->state = PHY_DOWN;
181 mutex_init(&dev->lock);
182 INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
183 INIT_WORK(&dev->phy_queue, phy_change);
185 /* Request the appropriate module unconditionally; don't
186 * bother trying to do so only if it isn't already loaded,
187 * because that gets complicated. A hotplug event would have
188 * done an unconditional modprobe anyway.
189 * We don't do normal hotplug because it won't work for MDIO
190 * -- because it relies on the device staying around for long
191 * enough for the driver to get loaded. With MDIO, the NIC
192 * driver will get bored and give up as soon as it finds that
193 * there's no driver _already_ loaded.
195 request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
197 device_initialize(&dev->dev);
201 EXPORT_SYMBOL(phy_device_create);
204 * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
205 * @bus: the target MII bus
206 * @addr: PHY address on the MII bus
207 * @phy_id: where to store the ID retrieved.
208 * @c45_ids: where to store the c45 ID information.
210 * If the PHY devices-in-package appears to be valid, it and the
211 * corresponding identifiers are stored in @c45_ids, zero is stored
212 * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
216 static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
217 struct phy_c45_device_ids *c45_ids) {
220 const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
222 /* Find first non-zero Devices In package. Device
223 * zero is reserved, so don't probe it.
226 i < num_ids && c45_ids->devices_in_package == 0;
228 reg_addr = MII_ADDR_C45 | i << 16 | 6;
229 phy_reg = mdiobus_read(bus, addr, reg_addr);
232 c45_ids->devices_in_package = (phy_reg & 0xffff) << 16;
234 reg_addr = MII_ADDR_C45 | i << 16 | 5;
235 phy_reg = mdiobus_read(bus, addr, reg_addr);
238 c45_ids->devices_in_package |= (phy_reg & 0xffff);
240 /* If mostly Fs, there is no device there,
241 * let's get out of here.
243 if ((c45_ids->devices_in_package & 0x1fffffff) == 0x1fffffff) {
244 *phy_id = 0xffffffff;
249 /* Now probe Device Identifiers for each device present. */
250 for (i = 1; i < num_ids; i++) {
251 if (!(c45_ids->devices_in_package & (1 << i)))
254 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
255 phy_reg = mdiobus_read(bus, addr, reg_addr);
258 c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
260 reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
261 phy_reg = mdiobus_read(bus, addr, reg_addr);
264 c45_ids->device_ids[i] |= (phy_reg & 0xffff);
271 * get_phy_id - reads the specified addr for its ID.
272 * @bus: the target MII bus
273 * @addr: PHY address on the MII bus
274 * @phy_id: where to store the ID retrieved.
275 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
276 * @c45_ids: where to store the c45 ID information.
278 * Description: In the case of a 802.3-c22 PHY, reads the ID registers
279 * of the PHY at @addr on the @bus, stores it in @phy_id and returns
282 * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
283 * its return value is in turn returned.
286 static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
287 bool is_c45, struct phy_c45_device_ids *c45_ids)
292 return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
294 /* Grab the bits from PHYIR1, and put them in the upper half */
295 phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
299 *phy_id = (phy_reg & 0xffff) << 16;
301 /* Grab the bits from PHYIR2, and put them in the lower half */
302 phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
306 *phy_id |= (phy_reg & 0xffff);
312 * get_phy_device - reads the specified PHY device and returns its @phy_device
314 * @bus: the target MII bus
315 * @addr: PHY address on the MII bus
316 * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
318 * Description: Reads the ID registers of the PHY at @addr on the
319 * @bus, then allocates and returns the phy_device to represent it.
321 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
323 struct phy_c45_device_ids c45_ids = {0};
327 r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
331 /* If the phy_id is mostly Fs, there is no device there */
332 if ((phy_id & 0x1fffffff) == 0x1fffffff)
335 return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
337 EXPORT_SYMBOL(get_phy_device);
340 * phy_device_register - Register the phy device on the MDIO bus
341 * @phydev: phy_device structure to be added to the MDIO bus
343 int phy_device_register(struct phy_device *phydev)
347 /* Don't register a phy if one is already registered at this address */
348 if (phydev->bus->phy_map[phydev->addr])
350 phydev->bus->phy_map[phydev->addr] = phydev;
352 /* Run all of the fixups for this PHY */
353 err = phy_init_hw(phydev);
355 pr_err("PHY %d failed to initialize\n", phydev->addr);
359 err = device_add(&phydev->dev);
361 pr_err("PHY %d failed to add\n", phydev->addr);
368 phydev->bus->phy_map[phydev->addr] = NULL;
371 EXPORT_SYMBOL(phy_device_register);
374 * phy_find_first - finds the first PHY device on the bus
375 * @bus: the target MII bus
377 struct phy_device *phy_find_first(struct mii_bus *bus)
381 for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
382 if (bus->phy_map[addr])
383 return bus->phy_map[addr];
387 EXPORT_SYMBOL(phy_find_first);
390 * phy_prepare_link - prepares the PHY layer to monitor link status
391 * @phydev: target phy_device struct
392 * @handler: callback function for link status change notifications
394 * Description: Tells the PHY infrastructure to handle the
395 * gory details on monitoring link status (whether through
396 * polling or an interrupt), and to call back to the
397 * connected device driver when the link status changes.
398 * If you want to monitor your own link state, don't call
401 static void phy_prepare_link(struct phy_device *phydev,
402 void (*handler)(struct net_device *))
404 phydev->adjust_link = handler;
408 * phy_connect_direct - connect an ethernet device to a specific phy_device
409 * @dev: the network device to connect
410 * @phydev: the pointer to the phy device
411 * @handler: callback function for state change notifications
412 * @interface: PHY device's interface
414 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
415 void (*handler)(struct net_device *),
416 phy_interface_t interface)
420 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
424 phy_prepare_link(phydev, handler);
425 phy_start_machine(phydev);
427 phy_start_interrupts(phydev);
431 EXPORT_SYMBOL(phy_connect_direct);
434 * phy_connect - connect an ethernet device to a PHY device
435 * @dev: the network device to connect
436 * @bus_id: the id string of the PHY device to connect
437 * @handler: callback function for state change notifications
438 * @interface: PHY device's interface
440 * Description: Convenience function for connecting ethernet
441 * devices to PHY devices. The default behavior is for
442 * the PHY infrastructure to handle everything, and only notify
443 * the connected driver when the link status changes. If you
444 * don't want, or can't use the provided functionality, you may
445 * choose to call only the subset of functions which provide
446 * the desired functionality.
448 struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
449 void (*handler)(struct net_device *),
450 phy_interface_t interface)
452 struct phy_device *phydev;
456 /* Search the list of PHY devices on the mdio bus for the
457 * PHY with the requested name
459 d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
461 pr_err("PHY %s not found\n", bus_id);
462 return ERR_PTR(-ENODEV);
464 phydev = to_phy_device(d);
466 rc = phy_connect_direct(dev, phydev, handler, interface);
472 EXPORT_SYMBOL(phy_connect);
475 * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
477 * @phydev: target phy_device struct
479 void phy_disconnect(struct phy_device *phydev)
482 phy_stop_interrupts(phydev);
484 phy_stop_machine(phydev);
486 phydev->adjust_link = NULL;
490 EXPORT_SYMBOL(phy_disconnect);
493 * phy_poll_reset - Safely wait until a PHY reset has properly completed
494 * @phydev: The PHY device to poll
496 * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
497 * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
498 * register must be polled until the BMCR_RESET bit clears.
500 * Furthermore, any attempts to write to PHY registers may have no effect
501 * or even generate MDIO bus errors until this is complete.
503 * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
504 * standard and do not fully reset after the BMCR_RESET bit is set, and may
505 * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
506 * effort to support such broken PHYs, this function is separate from the
507 * standard phy_init_hw() which will zero all the other bits in the BMCR
508 * and reapply all driver-specific and board-specific fixups.
510 static int phy_poll_reset(struct phy_device *phydev)
512 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
513 unsigned int retries = 12;
518 ret = phy_read(phydev, MII_BMCR);
521 } while (ret & BMCR_RESET && --retries);
522 if (ret & BMCR_RESET)
525 /* Some chips (smsc911x) may still need up to another 1ms after the
526 * BMCR_RESET bit is cleared before they are usable.
532 int phy_init_hw(struct phy_device *phydev)
536 if (!phydev->drv || !phydev->drv->config_init)
539 ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
543 ret = phy_poll_reset(phydev);
547 ret = phy_scan_fixups(phydev);
551 return phydev->drv->config_init(phydev);
553 EXPORT_SYMBOL(phy_init_hw);
556 * phy_attach_direct - attach a network device to a given PHY device pointer
557 * @dev: network device to attach
558 * @phydev: Pointer to phy_device to attach
559 * @flags: PHY device's dev_flags
560 * @interface: PHY device's interface
562 * Description: Called by drivers to attach to a particular PHY
563 * device. The phy_device is found, and properly hooked up
564 * to the phy_driver. If no driver is attached, then the
565 * genphy_driver is used. The phy_device is given a ptr to
566 * the attaching device, and given a callback for link status
567 * change. The phy_device is returned to the attaching driver.
569 static int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
570 u32 flags, phy_interface_t interface)
572 struct device *d = &phydev->dev;
575 /* Assume that if there is no driver, that it doesn't
576 * exist, and we should use the genphy driver.
578 if (NULL == d->driver) {
579 if (phydev->is_c45) {
580 pr_err("No driver for phy %x\n", phydev->phy_id);
584 d->driver = &genphy_driver.driver;
586 err = d->driver->probe(d);
588 err = device_bind_driver(d);
594 if (phydev->attached_dev) {
595 dev_err(&dev->dev, "PHY already attached\n");
599 phydev->attached_dev = dev;
600 dev->phydev = phydev;
602 phydev->dev_flags = flags;
604 phydev->interface = interface;
606 phydev->state = PHY_READY;
608 /* Do initial configuration here, now that
609 * we have certain key parameters
610 * (dev_flags and interface)
612 err = phy_init_hw(phydev);
622 * phy_attach - attach a network device to a particular PHY device
623 * @dev: network device to attach
624 * @bus_id: Bus ID of PHY device to attach
625 * @interface: PHY device's interface
627 * Description: Same as phy_attach_direct() except that a PHY bus_id
628 * string is passed instead of a pointer to a struct phy_device.
630 struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
631 phy_interface_t interface)
633 struct bus_type *bus = &mdio_bus_type;
634 struct phy_device *phydev;
638 /* Search the list of PHY devices on the mdio bus for the
639 * PHY with the requested name
641 d = bus_find_device_by_name(bus, NULL, bus_id);
643 pr_err("PHY %s not found\n", bus_id);
644 return ERR_PTR(-ENODEV);
646 phydev = to_phy_device(d);
648 rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
654 EXPORT_SYMBOL(phy_attach);
657 * phy_detach - detach a PHY device from its network device
658 * @phydev: target phy_device struct
660 void phy_detach(struct phy_device *phydev)
662 phydev->attached_dev->phydev = NULL;
663 phydev->attached_dev = NULL;
666 /* If the device had no specific driver before (i.e. - it
667 * was using the generic driver), we unbind the device
668 * from the generic driver so that there's a chance a
669 * real driver could be loaded
671 if (phydev->dev.driver == &genphy_driver.driver)
672 device_release_driver(&phydev->dev);
674 EXPORT_SYMBOL(phy_detach);
676 int phy_suspend(struct phy_device *phydev)
678 struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
679 struct ethtool_wolinfo wol;
681 /* If the device has WOL enabled, we cannot suspend the PHY */
682 wol.cmd = ETHTOOL_GWOL;
683 phy_ethtool_get_wol(phydev, &wol);
688 return phydrv->suspend(phydev);
692 int phy_resume(struct phy_device *phydev)
694 struct phy_driver *phydrv = to_phy_driver(phydev->dev.driver);
697 return phydrv->resume(phydev);
701 /* Generic PHY support and helper functions */
704 * genphy_config_advert - sanitize and advertise auto-negotiation parameters
705 * @phydev: target phy_device struct
707 * Description: Writes MII_ADVERTISE with the appropriate values,
708 * after sanitizing the values to make sure we only advertise
709 * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
710 * hasn't changed, and > 0 if it has changed.
712 static int genphy_config_advert(struct phy_device *phydev)
716 int err, changed = 0;
718 /* Only allow advertising what this PHY supports */
719 phydev->advertising &= phydev->supported;
720 advertise = phydev->advertising;
722 /* Setup standard advertisement */
723 adv = phy_read(phydev, MII_ADVERTISE);
728 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
729 ADVERTISE_PAUSE_ASYM);
730 adv |= ethtool_adv_to_mii_adv_t(advertise);
733 err = phy_write(phydev, MII_ADVERTISE, adv);
740 /* Configure gigabit if it's supported */
741 if (phydev->supported & (SUPPORTED_1000baseT_Half |
742 SUPPORTED_1000baseT_Full)) {
743 adv = phy_read(phydev, MII_CTRL1000);
748 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
749 adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
752 err = phy_write(phydev, MII_CTRL1000, adv);
764 * genphy_setup_forced - configures/forces speed/duplex from @phydev
765 * @phydev: target phy_device struct
767 * Description: Configures MII_BMCR to force speed/duplex
768 * to the values in phydev. Assumes that the values are valid.
769 * Please see phy_sanitize_settings().
771 int genphy_setup_forced(struct phy_device *phydev)
776 phydev->asym_pause = 0;
778 if (SPEED_1000 == phydev->speed)
779 ctl |= BMCR_SPEED1000;
780 else if (SPEED_100 == phydev->speed)
781 ctl |= BMCR_SPEED100;
783 if (DUPLEX_FULL == phydev->duplex)
784 ctl |= BMCR_FULLDPLX;
786 return phy_write(phydev, MII_BMCR, ctl);
788 EXPORT_SYMBOL(genphy_setup_forced);
791 * genphy_restart_aneg - Enable and Restart Autonegotiation
792 * @phydev: target phy_device struct
794 int genphy_restart_aneg(struct phy_device *phydev)
796 int ctl = phy_read(phydev, MII_BMCR);
801 ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
803 /* Don't isolate the PHY if we're negotiating */
804 ctl &= ~BMCR_ISOLATE;
806 return phy_write(phydev, MII_BMCR, ctl);
808 EXPORT_SYMBOL(genphy_restart_aneg);
811 * genphy_config_aneg - restart auto-negotiation or write BMCR
812 * @phydev: target phy_device struct
814 * Description: If auto-negotiation is enabled, we configure the
815 * advertising, and then restart auto-negotiation. If it is not
816 * enabled, then we write the BMCR.
818 int genphy_config_aneg(struct phy_device *phydev)
822 if (AUTONEG_ENABLE != phydev->autoneg)
823 return genphy_setup_forced(phydev);
825 result = genphy_config_advert(phydev);
826 if (result < 0) /* error */
829 /* Advertisement hasn't changed, but maybe aneg was never on to
830 * begin with? Or maybe phy was isolated?
832 int ctl = phy_read(phydev, MII_BMCR);
837 if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
838 result = 1; /* do restart aneg */
841 /* Only restart aneg if we are advertising something different
842 * than we were before.
845 result = genphy_restart_aneg(phydev);
849 EXPORT_SYMBOL(genphy_config_aneg);
852 * genphy_update_link - update link status in @phydev
853 * @phydev: target phy_device struct
855 * Description: Update the value in phydev->link to reflect the
856 * current link value. In order to do this, we need to read
857 * the status register twice, keeping the second value.
859 int genphy_update_link(struct phy_device *phydev)
864 status = phy_read(phydev, MII_BMSR);
868 /* Read link and autonegotiation status */
869 status = phy_read(phydev, MII_BMSR);
873 if ((status & BMSR_LSTATUS) == 0)
880 EXPORT_SYMBOL(genphy_update_link);
883 * genphy_read_status - check the link status and update current link state
884 * @phydev: target phy_device struct
886 * Description: Check the link, then figure out the current state
887 * by comparing what we advertise with what the link partner
888 * advertises. Start by checking the gigabit possibilities,
889 * then move on to 10/100.
891 int genphy_read_status(struct phy_device *phydev)
898 /* Update the link, but return if there was an error */
899 err = genphy_update_link(phydev);
903 phydev->lp_advertising = 0;
905 if (AUTONEG_ENABLE == phydev->autoneg) {
906 if (phydev->supported & (SUPPORTED_1000baseT_Half
907 | SUPPORTED_1000baseT_Full)) {
908 lpagb = phy_read(phydev, MII_STAT1000);
912 adv = phy_read(phydev, MII_CTRL1000);
916 phydev->lp_advertising =
917 mii_stat1000_to_ethtool_lpa_t(lpagb);
921 lpa = phy_read(phydev, MII_LPA);
925 phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
927 adv = phy_read(phydev, MII_ADVERTISE);
933 phydev->speed = SPEED_10;
934 phydev->duplex = DUPLEX_HALF;
936 phydev->asym_pause = 0;
938 if (lpagb & (LPA_1000FULL | LPA_1000HALF)) {
939 phydev->speed = SPEED_1000;
941 if (lpagb & LPA_1000FULL)
942 phydev->duplex = DUPLEX_FULL;
943 } else if (lpa & (LPA_100FULL | LPA_100HALF)) {
944 phydev->speed = SPEED_100;
946 if (lpa & LPA_100FULL)
947 phydev->duplex = DUPLEX_FULL;
949 if (lpa & LPA_10FULL)
950 phydev->duplex = DUPLEX_FULL;
952 if (phydev->duplex == DUPLEX_FULL) {
953 phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
954 phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
957 int bmcr = phy_read(phydev, MII_BMCR);
962 if (bmcr & BMCR_FULLDPLX)
963 phydev->duplex = DUPLEX_FULL;
965 phydev->duplex = DUPLEX_HALF;
967 if (bmcr & BMCR_SPEED1000)
968 phydev->speed = SPEED_1000;
969 else if (bmcr & BMCR_SPEED100)
970 phydev->speed = SPEED_100;
972 phydev->speed = SPEED_10;
975 phydev->asym_pause = 0;
980 EXPORT_SYMBOL(genphy_read_status);
982 static int genphy_config_init(struct phy_device *phydev)
987 /* For now, I'll claim that the generic driver supports
988 * all possible port types
990 features = (SUPPORTED_TP | SUPPORTED_MII
991 | SUPPORTED_AUI | SUPPORTED_FIBRE |
994 /* Do we support autonegotiation? */
995 val = phy_read(phydev, MII_BMSR);
999 if (val & BMSR_ANEGCAPABLE)
1000 features |= SUPPORTED_Autoneg;
1002 if (val & BMSR_100FULL)
1003 features |= SUPPORTED_100baseT_Full;
1004 if (val & BMSR_100HALF)
1005 features |= SUPPORTED_100baseT_Half;
1006 if (val & BMSR_10FULL)
1007 features |= SUPPORTED_10baseT_Full;
1008 if (val & BMSR_10HALF)
1009 features |= SUPPORTED_10baseT_Half;
1011 if (val & BMSR_ESTATEN) {
1012 val = phy_read(phydev, MII_ESTATUS);
1016 if (val & ESTATUS_1000_TFULL)
1017 features |= SUPPORTED_1000baseT_Full;
1018 if (val & ESTATUS_1000_THALF)
1019 features |= SUPPORTED_1000baseT_Half;
1022 phydev->supported = features;
1023 phydev->advertising = features;
1027 int genphy_suspend(struct phy_device *phydev)
1031 mutex_lock(&phydev->lock);
1033 value = phy_read(phydev, MII_BMCR);
1034 phy_write(phydev, MII_BMCR, value | BMCR_PDOWN);
1036 mutex_unlock(&phydev->lock);
1040 EXPORT_SYMBOL(genphy_suspend);
1042 int genphy_resume(struct phy_device *phydev)
1046 mutex_lock(&phydev->lock);
1048 value = phy_read(phydev, MII_BMCR);
1049 phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN);
1051 mutex_unlock(&phydev->lock);
1055 EXPORT_SYMBOL(genphy_resume);
1058 * phy_probe - probe and init a PHY device
1059 * @dev: device to probe and init
1061 * Description: Take care of setting up the phy_device structure,
1062 * set the state to READY (the driver's init function should
1063 * set it to STARTING if needed).
1065 static int phy_probe(struct device *dev)
1067 struct phy_device *phydev = to_phy_device(dev);
1068 struct device_driver *drv = phydev->dev.driver;
1069 struct phy_driver *phydrv = to_phy_driver(drv);
1072 phydev->drv = phydrv;
1074 /* Disable the interrupt if the PHY doesn't support it
1075 * but the interrupt is still a valid one
1077 if (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
1078 phy_interrupt_is_valid(phydev))
1079 phydev->irq = PHY_POLL;
1081 if (phydrv->flags & PHY_IS_INTERNAL)
1082 phydev->is_internal = true;
1084 mutex_lock(&phydev->lock);
1086 /* Start out supporting everything. Eventually,
1087 * a controller will attach, and may modify one
1088 * or both of these values
1090 phydev->supported = phydrv->features;
1091 phydev->advertising = phydrv->features;
1093 /* Set the state to READY by default */
1094 phydev->state = PHY_READY;
1096 if (phydev->drv->probe)
1097 err = phydev->drv->probe(phydev);
1099 mutex_unlock(&phydev->lock);
1104 static int phy_remove(struct device *dev)
1106 struct phy_device *phydev = to_phy_device(dev);
1108 mutex_lock(&phydev->lock);
1109 phydev->state = PHY_DOWN;
1110 mutex_unlock(&phydev->lock);
1112 if (phydev->drv->remove)
1113 phydev->drv->remove(phydev);
1120 * phy_driver_register - register a phy_driver with the PHY layer
1121 * @new_driver: new phy_driver to register
1123 int phy_driver_register(struct phy_driver *new_driver)
1127 new_driver->driver.name = new_driver->name;
1128 new_driver->driver.bus = &mdio_bus_type;
1129 new_driver->driver.probe = phy_probe;
1130 new_driver->driver.remove = phy_remove;
1132 retval = driver_register(&new_driver->driver);
1134 pr_err("%s: Error %d in registering driver\n",
1135 new_driver->name, retval);
1140 pr_debug("%s: Registered new driver\n", new_driver->name);
1144 EXPORT_SYMBOL(phy_driver_register);
1146 int phy_drivers_register(struct phy_driver *new_driver, int n)
1150 for (i = 0; i < n; i++) {
1151 ret = phy_driver_register(new_driver + i);
1154 phy_driver_unregister(new_driver + i);
1160 EXPORT_SYMBOL(phy_drivers_register);
1162 void phy_driver_unregister(struct phy_driver *drv)
1164 driver_unregister(&drv->driver);
1166 EXPORT_SYMBOL(phy_driver_unregister);
1168 void phy_drivers_unregister(struct phy_driver *drv, int n)
1172 for (i = 0; i < n; i++)
1173 phy_driver_unregister(drv + i);
1175 EXPORT_SYMBOL(phy_drivers_unregister);
1177 static struct phy_driver genphy_driver = {
1178 .phy_id = 0xffffffff,
1179 .phy_id_mask = 0xffffffff,
1180 .name = "Generic PHY",
1181 .config_init = genphy_config_init,
1183 .config_aneg = genphy_config_aneg,
1184 .read_status = genphy_read_status,
1185 .suspend = genphy_suspend,
1186 .resume = genphy_resume,
1187 .driver = { .owner = THIS_MODULE, },
1190 static int __init phy_init(void)
1194 rc = mdio_bus_init();
1198 rc = phy_driver_register(&genphy_driver);
1205 static void __exit phy_exit(void)
1207 phy_driver_unregister(&genphy_driver);
1211 subsys_initcall(phy_init);
1212 module_exit(phy_exit);