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- // SPDX-License-Identifier: GPL-2.0+
- /* Framework for finding and configuring PHYs.
- * Also contains generic PHY driver
- *
- * Author: Andy Fleming
- *
- * Copyright (c) 2004 Freescale Semiconductor, Inc.
- */
- #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/unistd.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
- #include <linux/init.h>
- #include <linux/delay.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include <linux/mm.h>
- #include <linux/module.h>
- #include <linux/mii.h>
- #include <linux/ethtool.h>
- #include <linux/bitmap.h>
- #include <linux/phy.h>
- #include <linux/phy_led_triggers.h>
- #include <linux/mdio.h>
- #include <linux/io.h>
- #include <linux/uaccess.h>
- MODULE_DESCRIPTION("PHY library");
- MODULE_AUTHOR("Andy Fleming");
- MODULE_LICENSE("GPL");
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_basic_features);
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_basic_t1_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_basic_t1_features);
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_gbit_features);
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_fibre_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_gbit_fibre_features);
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_gbit_all_ports_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_gbit_all_ports_features);
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_10gbit_features);
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_fec_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_10gbit_fec_features);
- const int phy_basic_ports_array[3] = {
- ETHTOOL_LINK_MODE_Autoneg_BIT,
- ETHTOOL_LINK_MODE_TP_BIT,
- ETHTOOL_LINK_MODE_MII_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_basic_ports_array);
- const int phy_fibre_port_array[1] = {
- ETHTOOL_LINK_MODE_FIBRE_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_fibre_port_array);
- const int phy_all_ports_features_array[7] = {
- ETHTOOL_LINK_MODE_Autoneg_BIT,
- ETHTOOL_LINK_MODE_TP_BIT,
- ETHTOOL_LINK_MODE_MII_BIT,
- ETHTOOL_LINK_MODE_FIBRE_BIT,
- ETHTOOL_LINK_MODE_AUI_BIT,
- ETHTOOL_LINK_MODE_BNC_BIT,
- ETHTOOL_LINK_MODE_Backplane_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_all_ports_features_array);
- const int phy_10_100_features_array[4] = {
- ETHTOOL_LINK_MODE_10baseT_Half_BIT,
- ETHTOOL_LINK_MODE_10baseT_Full_BIT,
- ETHTOOL_LINK_MODE_100baseT_Half_BIT,
- ETHTOOL_LINK_MODE_100baseT_Full_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_10_100_features_array);
- const int phy_basic_t1_features_array[2] = {
- ETHTOOL_LINK_MODE_TP_BIT,
- ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_basic_t1_features_array);
- const int phy_gbit_features_array[2] = {
- ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
- ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_gbit_features_array);
- const int phy_10gbit_features_array[1] = {
- ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_10gbit_features_array);
- const int phy_10gbit_fec_features_array[1] = {
- ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
- };
- EXPORT_SYMBOL_GPL(phy_10gbit_fec_features_array);
- __ETHTOOL_DECLARE_LINK_MODE_MASK(phy_10gbit_full_features) __ro_after_init;
- EXPORT_SYMBOL_GPL(phy_10gbit_full_features);
- static const int phy_10gbit_full_features_array[] = {
- ETHTOOL_LINK_MODE_10baseT_Full_BIT,
- ETHTOOL_LINK_MODE_100baseT_Full_BIT,
- ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
- ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
- };
- static void features_init(void)
- {
- /* 10/100 half/full*/
- linkmode_set_bit_array(phy_basic_ports_array,
- ARRAY_SIZE(phy_basic_ports_array),
- phy_basic_features);
- linkmode_set_bit_array(phy_10_100_features_array,
- ARRAY_SIZE(phy_10_100_features_array),
- phy_basic_features);
- /* 100 full, TP */
- linkmode_set_bit_array(phy_basic_t1_features_array,
- ARRAY_SIZE(phy_basic_t1_features_array),
- phy_basic_t1_features);
- /* 10/100 half/full + 1000 half/full */
- linkmode_set_bit_array(phy_basic_ports_array,
- ARRAY_SIZE(phy_basic_ports_array),
- phy_gbit_features);
- linkmode_set_bit_array(phy_10_100_features_array,
- ARRAY_SIZE(phy_10_100_features_array),
- phy_gbit_features);
- linkmode_set_bit_array(phy_gbit_features_array,
- ARRAY_SIZE(phy_gbit_features_array),
- phy_gbit_features);
- /* 10/100 half/full + 1000 half/full + fibre*/
- linkmode_set_bit_array(phy_basic_ports_array,
- ARRAY_SIZE(phy_basic_ports_array),
- phy_gbit_fibre_features);
- linkmode_set_bit_array(phy_10_100_features_array,
- ARRAY_SIZE(phy_10_100_features_array),
- phy_gbit_fibre_features);
- linkmode_set_bit_array(phy_gbit_features_array,
- ARRAY_SIZE(phy_gbit_features_array),
- phy_gbit_fibre_features);
- linkmode_set_bit_array(phy_fibre_port_array,
- ARRAY_SIZE(phy_fibre_port_array),
- phy_gbit_fibre_features);
- /* 10/100 half/full + 1000 half/full + TP/MII/FIBRE/AUI/BNC/Backplane*/
- linkmode_set_bit_array(phy_all_ports_features_array,
- ARRAY_SIZE(phy_all_ports_features_array),
- phy_gbit_all_ports_features);
- linkmode_set_bit_array(phy_10_100_features_array,
- ARRAY_SIZE(phy_10_100_features_array),
- phy_gbit_all_ports_features);
- linkmode_set_bit_array(phy_gbit_features_array,
- ARRAY_SIZE(phy_gbit_features_array),
- phy_gbit_all_ports_features);
- /* 10/100 half/full + 1000 half/full + 10G full*/
- linkmode_set_bit_array(phy_all_ports_features_array,
- ARRAY_SIZE(phy_all_ports_features_array),
- phy_10gbit_features);
- linkmode_set_bit_array(phy_10_100_features_array,
- ARRAY_SIZE(phy_10_100_features_array),
- phy_10gbit_features);
- linkmode_set_bit_array(phy_gbit_features_array,
- ARRAY_SIZE(phy_gbit_features_array),
- phy_10gbit_features);
- linkmode_set_bit_array(phy_10gbit_features_array,
- ARRAY_SIZE(phy_10gbit_features_array),
- phy_10gbit_features);
- /* 10/100/1000/10G full */
- linkmode_set_bit_array(phy_all_ports_features_array,
- ARRAY_SIZE(phy_all_ports_features_array),
- phy_10gbit_full_features);
- linkmode_set_bit_array(phy_10gbit_full_features_array,
- ARRAY_SIZE(phy_10gbit_full_features_array),
- phy_10gbit_full_features);
- /* 10G FEC only */
- linkmode_set_bit_array(phy_10gbit_fec_features_array,
- ARRAY_SIZE(phy_10gbit_fec_features_array),
- phy_10gbit_fec_features);
- }
- void phy_device_free(struct phy_device *phydev)
- {
- put_device(&phydev->mdio.dev);
- }
- EXPORT_SYMBOL(phy_device_free);
- static void phy_mdio_device_free(struct mdio_device *mdiodev)
- {
- struct phy_device *phydev;
- phydev = container_of(mdiodev, struct phy_device, mdio);
- phy_device_free(phydev);
- }
- static void phy_device_release(struct device *dev)
- {
- kfree(to_phy_device(dev));
- }
- static void phy_mdio_device_remove(struct mdio_device *mdiodev)
- {
- struct phy_device *phydev;
- phydev = container_of(mdiodev, struct phy_device, mdio);
- phy_device_remove(phydev);
- }
- static struct phy_driver genphy_driver;
- extern struct phy_driver genphy_c45_driver;
- static LIST_HEAD(phy_fixup_list);
- static DEFINE_MUTEX(phy_fixup_lock);
- #ifdef CONFIG_PM
- static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
- {
- struct device_driver *drv = phydev->mdio.dev.driver;
- struct phy_driver *phydrv = to_phy_driver(drv);
- struct net_device *netdev = phydev->attached_dev;
- if (!drv || !phydrv->suspend)
- return false;
- /* PHY not attached? May suspend if the PHY has not already been
- * suspended as part of a prior call to phy_disconnect() ->
- * phy_detach() -> phy_suspend() because the parent netdev might be the
- * MDIO bus driver and clock gated at this point.
- */
- if (!netdev)
- goto out;
- if (netdev->wol_enabled)
- return false;
- /* As long as not all affected network drivers support the
- * wol_enabled flag, let's check for hints that WoL is enabled.
- * Don't suspend PHY if the attached netdev parent may wake up.
- * The parent may point to a PCI device, as in tg3 driver.
- */
- if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
- return false;
- /* Also don't suspend PHY if the netdev itself may wakeup. This
- * is the case for devices w/o underlaying pwr. mgmt. aware bus,
- * e.g. SoC devices.
- */
- if (device_may_wakeup(&netdev->dev))
- return false;
- out:
- return !phydev->suspended;
- }
- static int mdio_bus_phy_suspend(struct device *dev)
- {
- struct phy_device *phydev = to_phy_device(dev);
- /* We must stop the state machine manually, otherwise it stops out of
- * control, possibly with the phydev->lock held. Upon resume, netdev
- * may call phy routines that try to grab the same lock, and that may
- * lead to a deadlock.
- */
- if (phydev->attached_dev && phydev->adjust_link)
- phy_stop_machine(phydev);
- if (!mdio_bus_phy_may_suspend(phydev))
- return 0;
- phydev->suspended_by_mdio_bus = 1;
- return phy_suspend(phydev);
- }
- static int mdio_bus_phy_resume(struct device *dev)
- {
- struct phy_device *phydev = to_phy_device(dev);
- int ret;
- if (!phydev->suspended_by_mdio_bus)
- goto no_resume;
- phydev->suspended_by_mdio_bus = 0;
- ret = phy_resume(phydev);
- if (ret < 0)
- return ret;
- no_resume:
- if (phydev->attached_dev && phydev->adjust_link)
- phy_start_machine(phydev);
- return 0;
- }
- static int mdio_bus_phy_restore(struct device *dev)
- {
- struct phy_device *phydev = to_phy_device(dev);
- struct net_device *netdev = phydev->attached_dev;
- int ret;
- if (!netdev)
- return 0;
- ret = phy_init_hw(phydev);
- if (ret < 0)
- return ret;
- if (phydev->attached_dev && phydev->adjust_link)
- phy_start_machine(phydev);
- return 0;
- }
- static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
- .suspend = mdio_bus_phy_suspend,
- .resume = mdio_bus_phy_resume,
- .freeze = mdio_bus_phy_suspend,
- .thaw = mdio_bus_phy_resume,
- .restore = mdio_bus_phy_restore,
- };
- #define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
- #else
- #define MDIO_BUS_PHY_PM_OPS NULL
- #endif /* CONFIG_PM */
- /**
- * phy_register_fixup - creates a new phy_fixup and adds it to the list
- * @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
- * @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
- * It can also be PHY_ANY_UID
- * @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
- * comparison
- * @run: The actual code to be run when a matching PHY is found
- */
- int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
- int (*run)(struct phy_device *))
- {
- struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
- if (!fixup)
- return -ENOMEM;
- strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
- fixup->phy_uid = phy_uid;
- fixup->phy_uid_mask = phy_uid_mask;
- fixup->run = run;
- mutex_lock(&phy_fixup_lock);
- list_add_tail(&fixup->list, &phy_fixup_list);
- mutex_unlock(&phy_fixup_lock);
- return 0;
- }
- EXPORT_SYMBOL(phy_register_fixup);
- /* Registers a fixup to be run on any PHY with the UID in phy_uid */
- int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
- int (*run)(struct phy_device *))
- {
- return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
- }
- EXPORT_SYMBOL(phy_register_fixup_for_uid);
- /* Registers a fixup to be run on the PHY with id string bus_id */
- int phy_register_fixup_for_id(const char *bus_id,
- int (*run)(struct phy_device *))
- {
- return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
- }
- EXPORT_SYMBOL(phy_register_fixup_for_id);
- /**
- * phy_unregister_fixup - remove a phy_fixup from the list
- * @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
- * @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
- * @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
- */
- int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
- {
- struct list_head *pos, *n;
- struct phy_fixup *fixup;
- int ret;
- ret = -ENODEV;
- mutex_lock(&phy_fixup_lock);
- list_for_each_safe(pos, n, &phy_fixup_list) {
- fixup = list_entry(pos, struct phy_fixup, list);
- if ((!strcmp(fixup->bus_id, bus_id)) &&
- ((fixup->phy_uid & phy_uid_mask) ==
- (phy_uid & phy_uid_mask))) {
- list_del(&fixup->list);
- kfree(fixup);
- ret = 0;
- break;
- }
- }
- mutex_unlock(&phy_fixup_lock);
- return ret;
- }
- EXPORT_SYMBOL(phy_unregister_fixup);
- /* Unregisters a fixup of any PHY with the UID in phy_uid */
- int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
- {
- return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
- }
- EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
- /* Unregisters a fixup of the PHY with id string bus_id */
- int phy_unregister_fixup_for_id(const char *bus_id)
- {
- return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
- }
- EXPORT_SYMBOL(phy_unregister_fixup_for_id);
- /* Returns 1 if fixup matches phydev in bus_id and phy_uid.
- * Fixups can be set to match any in one or more fields.
- */
- static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
- {
- if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
- if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
- return 0;
- if ((fixup->phy_uid & fixup->phy_uid_mask) !=
- (phydev->phy_id & fixup->phy_uid_mask))
- if (fixup->phy_uid != PHY_ANY_UID)
- return 0;
- return 1;
- }
- /* Runs any matching fixups for this phydev */
- static int phy_scan_fixups(struct phy_device *phydev)
- {
- struct phy_fixup *fixup;
- mutex_lock(&phy_fixup_lock);
- list_for_each_entry(fixup, &phy_fixup_list, list) {
- if (phy_needs_fixup(phydev, fixup)) {
- int err = fixup->run(phydev);
- if (err < 0) {
- mutex_unlock(&phy_fixup_lock);
- return err;
- }
- phydev->has_fixups = true;
- }
- }
- mutex_unlock(&phy_fixup_lock);
- return 0;
- }
- static int phy_bus_match(struct device *dev, struct device_driver *drv)
- {
- struct phy_device *phydev = to_phy_device(dev);
- struct phy_driver *phydrv = to_phy_driver(drv);
- const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
- int i;
- if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
- return 0;
- if (phydrv->match_phy_device)
- return phydrv->match_phy_device(phydev);
- if (phydev->is_c45) {
- for (i = 1; i < num_ids; i++) {
- if (phydev->c45_ids.device_ids[i] == 0xffffffff)
- continue;
- if ((phydrv->phy_id & phydrv->phy_id_mask) ==
- (phydev->c45_ids.device_ids[i] &
- phydrv->phy_id_mask))
- return 1;
- }
- return 0;
- } else {
- return (phydrv->phy_id & phydrv->phy_id_mask) ==
- (phydev->phy_id & phydrv->phy_id_mask);
- }
- }
- static ssize_t
- phy_id_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct phy_device *phydev = to_phy_device(dev);
- return sprintf(buf, "0x%.8lx\n", (unsigned long)phydev->phy_id);
- }
- static DEVICE_ATTR_RO(phy_id);
- static ssize_t
- phy_interface_show(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct phy_device *phydev = to_phy_device(dev);
- const char *mode = NULL;
- if (phy_is_internal(phydev))
- mode = "internal";
- else
- mode = phy_modes(phydev->interface);
- return sprintf(buf, "%s\n", mode);
- }
- static DEVICE_ATTR_RO(phy_interface);
- static ssize_t
- phy_has_fixups_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct phy_device *phydev = to_phy_device(dev);
- return sprintf(buf, "%d\n", phydev->has_fixups);
- }
- static DEVICE_ATTR_RO(phy_has_fixups);
- static struct attribute *phy_dev_attrs[] = {
- &dev_attr_phy_id.attr,
- &dev_attr_phy_interface.attr,
- &dev_attr_phy_has_fixups.attr,
- NULL,
- };
- ATTRIBUTE_GROUPS(phy_dev);
- static const struct device_type mdio_bus_phy_type = {
- .name = "PHY",
- .groups = phy_dev_groups,
- .release = phy_device_release,
- .pm = MDIO_BUS_PHY_PM_OPS,
- };
- static int phy_request_driver_module(struct phy_device *dev, u32 phy_id)
- {
- int ret;
- ret = request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT,
- MDIO_ID_ARGS(phy_id));
- /* We only check for failures in executing the usermode binary,
- * not whether a PHY driver module exists for the PHY ID.
- * Accept -ENOENT because this may occur in case no initramfs exists,
- * then modprobe isn't available.
- */
- if (IS_ENABLED(CONFIG_MODULES) && ret < 0 && ret != -ENOENT) {
- phydev_err(dev, "error %d loading PHY driver module for ID 0x%08lx\n",
- ret, (unsigned long)phy_id);
- return ret;
- }
- return 0;
- }
- struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
- bool is_c45,
- struct phy_c45_device_ids *c45_ids)
- {
- struct phy_device *dev;
- struct mdio_device *mdiodev;
- int ret = 0;
- /* We allocate the device, and initialize the default values */
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return ERR_PTR(-ENOMEM);
- mdiodev = &dev->mdio;
- mdiodev->dev.parent = &bus->dev;
- mdiodev->dev.bus = &mdio_bus_type;
- mdiodev->dev.type = &mdio_bus_phy_type;
- mdiodev->bus = bus;
- mdiodev->bus_match = phy_bus_match;
- mdiodev->addr = addr;
- mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
- mdiodev->device_free = phy_mdio_device_free;
- mdiodev->device_remove = phy_mdio_device_remove;
- dev->speed = SPEED_UNKNOWN;
- dev->duplex = DUPLEX_UNKNOWN;
- dev->pause = 0;
- dev->asym_pause = 0;
- dev->link = 0;
- dev->interface = PHY_INTERFACE_MODE_GMII;
- dev->autoneg = AUTONEG_ENABLE;
- dev->is_c45 = is_c45;
- dev->phy_id = phy_id;
- if (c45_ids)
- dev->c45_ids = *c45_ids;
- dev->irq = bus->irq[addr];
- dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
- device_initialize(&mdiodev->dev);
- dev->state = PHY_DOWN;
- mutex_init(&dev->lock);
- INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
- /* Request the appropriate module unconditionally; don't
- * bother trying to do so only if it isn't already loaded,
- * because that gets complicated. A hotplug event would have
- * done an unconditional modprobe anyway.
- * We don't do normal hotplug because it won't work for MDIO
- * -- because it relies on the device staying around for long
- * enough for the driver to get loaded. With MDIO, the NIC
- * driver will get bored and give up as soon as it finds that
- * there's no driver _already_ loaded.
- */
- if (is_c45 && c45_ids) {
- const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
- int i;
- for (i = 1; i < num_ids; i++) {
- if (c45_ids->device_ids[i] == 0xffffffff)
- continue;
- ret = phy_request_driver_module(dev,
- c45_ids->device_ids[i]);
- if (ret)
- break;
- }
- } else {
- ret = phy_request_driver_module(dev, phy_id);
- }
- if (ret) {
- put_device(&mdiodev->dev);
- dev = ERR_PTR(ret);
- }
- return dev;
- }
- EXPORT_SYMBOL(phy_device_create);
- /* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
- * @bus: the target MII bus
- * @addr: PHY address on the MII bus
- * @dev_addr: MMD address in the PHY.
- * @devices_in_package: where to store the devices in package information.
- *
- * Description: reads devices in package registers of a MMD at @dev_addr
- * from PHY at @addr on @bus.
- *
- * Returns: 0 on success, -EIO on failure.
- */
- static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
- u32 *devices_in_package)
- {
- int phy_reg, reg_addr;
- reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
- phy_reg = mdiobus_read(bus, addr, reg_addr);
- if (phy_reg < 0)
- return -EIO;
- *devices_in_package = phy_reg << 16;
- reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
- phy_reg = mdiobus_read(bus, addr, reg_addr);
- if (phy_reg < 0)
- return -EIO;
- *devices_in_package |= phy_reg;
- /* Bit 0 doesn't represent a device, it indicates c22 regs presence */
- *devices_in_package &= ~BIT(0);
- return 0;
- }
- /**
- * get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
- * @bus: the target MII bus
- * @addr: PHY address on the MII bus
- * @phy_id: where to store the ID retrieved.
- * @c45_ids: where to store the c45 ID information.
- *
- * If the PHY devices-in-package appears to be valid, it and the
- * corresponding identifiers are stored in @c45_ids, zero is stored
- * in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
- * zero on success.
- *
- */
- static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
- struct phy_c45_device_ids *c45_ids) {
- int phy_reg;
- int i, reg_addr;
- const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
- u32 *devs = &c45_ids->devices_in_package;
- /* Find first non-zero Devices In package. Device zero is reserved
- * for 802.3 c45 complied PHYs, so don't probe it at first.
- */
- for (i = 1; i < num_ids && *devs == 0; i++) {
- phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
- if (phy_reg < 0)
- return -EIO;
- if ((*devs & 0x1fffffff) == 0x1fffffff) {
- /* If mostly Fs, there is no device there,
- * then let's continue to probe more, as some
- * 10G PHYs have zero Devices In package,
- * e.g. Cortina CS4315/CS4340 PHY.
- */
- phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
- if (phy_reg < 0)
- return -EIO;
- /* no device there, let's get out of here */
- if ((*devs & 0x1fffffff) == 0x1fffffff) {
- *phy_id = 0xffffffff;
- return 0;
- } else {
- break;
- }
- }
- }
- /* Now probe Device Identifiers for each device present. */
- for (i = 1; i < num_ids; i++) {
- if (!(c45_ids->devices_in_package & (1 << i)))
- continue;
- reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
- phy_reg = mdiobus_read(bus, addr, reg_addr);
- if (phy_reg < 0)
- return -EIO;
- c45_ids->device_ids[i] = phy_reg << 16;
- reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
- phy_reg = mdiobus_read(bus, addr, reg_addr);
- if (phy_reg < 0)
- return -EIO;
- c45_ids->device_ids[i] |= phy_reg;
- }
- *phy_id = 0;
- return 0;
- }
- /**
- * get_phy_id - reads the specified addr for its ID.
- * @bus: the target MII bus
- * @addr: PHY address on the MII bus
- * @phy_id: where to store the ID retrieved.
- * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
- * @c45_ids: where to store the c45 ID information.
- *
- * Description: In the case of a 802.3-c22 PHY, reads the ID registers
- * of the PHY at @addr on the @bus, stores it in @phy_id and returns
- * zero on success.
- *
- * In the case of a 802.3-c45 PHY, get_phy_c45_ids() is invoked, and
- * its return value is in turn returned.
- *
- */
- static int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id,
- bool is_c45, struct phy_c45_device_ids *c45_ids)
- {
- int phy_reg;
- if (is_c45)
- return get_phy_c45_ids(bus, addr, phy_id, c45_ids);
- /* Grab the bits from PHYIR1, and put them in the upper half */
- phy_reg = mdiobus_read(bus, addr, MII_PHYSID1);
- if (phy_reg < 0) {
- /* returning -ENODEV doesn't stop bus scanning */
- return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
- }
- *phy_id = phy_reg << 16;
- /* Grab the bits from PHYIR2, and put them in the lower half */
- phy_reg = mdiobus_read(bus, addr, MII_PHYSID2);
- if (phy_reg < 0) {
- /* returning -ENODEV doesn't stop bus scanning */
- return (phy_reg == -EIO || phy_reg == -ENODEV) ? -ENODEV : -EIO;
- }
- *phy_id |= phy_reg;
- return 0;
- }
- /**
- * get_phy_device - reads the specified PHY device and returns its @phy_device
- * struct
- * @bus: the target MII bus
- * @addr: PHY address on the MII bus
- * @is_c45: If true the PHY uses the 802.3 clause 45 protocol
- *
- * Description: Reads the ID registers of the PHY at @addr on the
- * @bus, then allocates and returns the phy_device to represent it.
- */
- struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45)
- {
- struct phy_c45_device_ids c45_ids;
- u32 phy_id = 0;
- int r;
- c45_ids.devices_in_package = 0;
- memset(c45_ids.device_ids, 0xff, sizeof(c45_ids.device_ids));
- r = get_phy_id(bus, addr, &phy_id, is_c45, &c45_ids);
- if (r)
- return ERR_PTR(r);
- /* If the phy_id is mostly Fs, there is no device there */
- if ((phy_id & 0x1fffffff) == 0x1fffffff)
- return ERR_PTR(-ENODEV);
- return phy_device_create(bus, addr, phy_id, is_c45, &c45_ids);
- }
- EXPORT_SYMBOL(get_phy_device);
- /**
- * phy_device_register - Register the phy device on the MDIO bus
- * @phydev: phy_device structure to be added to the MDIO bus
- */
- int phy_device_register(struct phy_device *phydev)
- {
- int err;
- err = mdiobus_register_device(&phydev->mdio);
- if (err)
- return err;
- /* Deassert the reset signal */
- phy_device_reset(phydev, 0);
- /* Run all of the fixups for this PHY */
- err = phy_scan_fixups(phydev);
- if (err) {
- phydev_err(phydev, "failed to initialize\n");
- goto out;
- }
- err = device_add(&phydev->mdio.dev);
- if (err) {
- phydev_err(phydev, "failed to add\n");
- goto out;
- }
- return 0;
- out:
- /* Assert the reset signal */
- phy_device_reset(phydev, 1);
- mdiobus_unregister_device(&phydev->mdio);
- return err;
- }
- EXPORT_SYMBOL(phy_device_register);
- /**
- * phy_device_remove - Remove a previously registered phy device from the MDIO bus
- * @phydev: phy_device structure to remove
- *
- * This doesn't free the phy_device itself, it merely reverses the effects
- * of phy_device_register(). Use phy_device_free() to free the device
- * after calling this function.
- */
- void phy_device_remove(struct phy_device *phydev)
- {
- device_del(&phydev->mdio.dev);
- /* Assert the reset signal */
- phy_device_reset(phydev, 1);
- mdiobus_unregister_device(&phydev->mdio);
- }
- EXPORT_SYMBOL(phy_device_remove);
- /**
- * phy_find_first - finds the first PHY device on the bus
- * @bus: the target MII bus
- */
- struct phy_device *phy_find_first(struct mii_bus *bus)
- {
- struct phy_device *phydev;
- int addr;
- for (addr = 0; addr < PHY_MAX_ADDR; addr++) {
- phydev = mdiobus_get_phy(bus, addr);
- if (phydev)
- return phydev;
- }
- return NULL;
- }
- EXPORT_SYMBOL(phy_find_first);
- static void phy_link_change(struct phy_device *phydev, bool up, bool do_carrier)
- {
- struct net_device *netdev = phydev->attached_dev;
- if (do_carrier) {
- if (up)
- netif_carrier_on(netdev);
- else
- netif_carrier_off(netdev);
- }
- phydev->adjust_link(netdev);
- }
- /**
- * phy_prepare_link - prepares the PHY layer to monitor link status
- * @phydev: target phy_device struct
- * @handler: callback function for link status change notifications
- *
- * Description: Tells the PHY infrastructure to handle the
- * gory details on monitoring link status (whether through
- * polling or an interrupt), and to call back to the
- * connected device driver when the link status changes.
- * If you want to monitor your own link state, don't call
- * this function.
- */
- static void phy_prepare_link(struct phy_device *phydev,
- void (*handler)(struct net_device *))
- {
- phydev->adjust_link = handler;
- }
- /**
- * phy_connect_direct - connect an ethernet device to a specific phy_device
- * @dev: the network device to connect
- * @phydev: the pointer to the phy device
- * @handler: callback function for state change notifications
- * @interface: PHY device's interface
- */
- int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
- void (*handler)(struct net_device *),
- phy_interface_t interface)
- {
- int rc;
- if (!dev)
- return -EINVAL;
- rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
- if (rc)
- return rc;
- phy_prepare_link(phydev, handler);
- if (phy_interrupt_is_valid(phydev))
- phy_request_interrupt(phydev);
- return 0;
- }
- EXPORT_SYMBOL(phy_connect_direct);
- /**
- * phy_connect - connect an ethernet device to a PHY device
- * @dev: the network device to connect
- * @bus_id: the id string of the PHY device to connect
- * @handler: callback function for state change notifications
- * @interface: PHY device's interface
- *
- * Description: Convenience function for connecting ethernet
- * devices to PHY devices. The default behavior is for
- * the PHY infrastructure to handle everything, and only notify
- * the connected driver when the link status changes. If you
- * don't want, or can't use the provided functionality, you may
- * choose to call only the subset of functions which provide
- * the desired functionality.
- */
- struct phy_device *phy_connect(struct net_device *dev, const char *bus_id,
- void (*handler)(struct net_device *),
- phy_interface_t interface)
- {
- struct phy_device *phydev;
- struct device *d;
- int rc;
- /* Search the list of PHY devices on the mdio bus for the
- * PHY with the requested name
- */
- d = bus_find_device_by_name(&mdio_bus_type, NULL, bus_id);
- if (!d) {
- pr_err("PHY %s not found\n", bus_id);
- return ERR_PTR(-ENODEV);
- }
- phydev = to_phy_device(d);
- rc = phy_connect_direct(dev, phydev, handler, interface);
- put_device(d);
- if (rc)
- return ERR_PTR(rc);
- return phydev;
- }
- EXPORT_SYMBOL(phy_connect);
- /**
- * phy_disconnect - disable interrupts, stop state machine, and detach a PHY
- * device
- * @phydev: target phy_device struct
- */
- void phy_disconnect(struct phy_device *phydev)
- {
- if (phy_is_started(phydev))
- phy_stop(phydev);
- if (phy_interrupt_is_valid(phydev))
- phy_free_interrupt(phydev);
- phydev->adjust_link = NULL;
- phy_detach(phydev);
- }
- EXPORT_SYMBOL(phy_disconnect);
- /**
- * phy_poll_reset - Safely wait until a PHY reset has properly completed
- * @phydev: The PHY device to poll
- *
- * Description: According to IEEE 802.3, Section 2, Subsection 22.2.4.1.1, as
- * published in 2008, a PHY reset may take up to 0.5 seconds. The MII BMCR
- * register must be polled until the BMCR_RESET bit clears.
- *
- * Furthermore, any attempts to write to PHY registers may have no effect
- * or even generate MDIO bus errors until this is complete.
- *
- * Some PHYs (such as the Marvell 88E1111) don't entirely conform to the
- * standard and do not fully reset after the BMCR_RESET bit is set, and may
- * even *REQUIRE* a soft-reset to properly restart autonegotiation. In an
- * effort to support such broken PHYs, this function is separate from the
- * standard phy_init_hw() which will zero all the other bits in the BMCR
- * and reapply all driver-specific and board-specific fixups.
- */
- static int phy_poll_reset(struct phy_device *phydev)
- {
- /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
- unsigned int retries = 12;
- int ret;
- do {
- msleep(50);
- ret = phy_read(phydev, MII_BMCR);
- if (ret < 0)
- return ret;
- } while (ret & BMCR_RESET && --retries);
- if (ret & BMCR_RESET)
- return -ETIMEDOUT;
- /* Some chips (smsc911x) may still need up to another 1ms after the
- * BMCR_RESET bit is cleared before they are usable.
- */
- msleep(1);
- return 0;
- }
- int phy_init_hw(struct phy_device *phydev)
- {
- int ret = 0;
- /* Deassert the reset signal */
- phy_device_reset(phydev, 0);
- if (!phydev->drv)
- return 0;
- if (phydev->drv->soft_reset)
- ret = phydev->drv->soft_reset(phydev);
- if (ret < 0)
- return ret;
- ret = phy_scan_fixups(phydev);
- if (ret < 0)
- return ret;
- if (phydev->drv->config_init)
- ret = phydev->drv->config_init(phydev);
- return ret;
- }
- EXPORT_SYMBOL(phy_init_hw);
- void phy_attached_info(struct phy_device *phydev)
- {
- phy_attached_print(phydev, NULL);
- }
- EXPORT_SYMBOL(phy_attached_info);
- #define ATTACHED_FMT "attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%s)"
- void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
- {
- const char *drv_name = phydev->drv ? phydev->drv->name : "unbound";
- char *irq_str;
- char irq_num[8];
- switch(phydev->irq) {
- case PHY_POLL:
- irq_str = "POLL";
- break;
- case PHY_IGNORE_INTERRUPT:
- irq_str = "IGNORE";
- break;
- default:
- snprintf(irq_num, sizeof(irq_num), "%d", phydev->irq);
- irq_str = irq_num;
- break;
- }
- if (!fmt) {
- phydev_info(phydev, ATTACHED_FMT "\n",
- drv_name, phydev_name(phydev),
- irq_str);
- } else {
- va_list ap;
- phydev_info(phydev, ATTACHED_FMT,
- drv_name, phydev_name(phydev),
- irq_str);
- va_start(ap, fmt);
- vprintk(fmt, ap);
- va_end(ap);
- }
- }
- EXPORT_SYMBOL(phy_attached_print);
- static void phy_sysfs_create_links(struct phy_device *phydev)
- {
- struct net_device *dev = phydev->attached_dev;
- int err;
- if (!dev)
- return;
- err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,
- "attached_dev");
- if (err)
- return;
- err = sysfs_create_link_nowarn(&dev->dev.kobj,
- &phydev->mdio.dev.kobj,
- "phydev");
- if (err) {
- dev_err(&dev->dev, "could not add device link to %s err %d\n",
- kobject_name(&phydev->mdio.dev.kobj),
- err);
- /* non-fatal - some net drivers can use one netdevice
- * with more then one phy
- */
- }
- phydev->sysfs_links = true;
- }
- static ssize_t
- phy_standalone_show(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct phy_device *phydev = to_phy_device(dev);
- return sprintf(buf, "%d\n", !phydev->attached_dev);
- }
- static DEVICE_ATTR_RO(phy_standalone);
- /**
- * phy_attach_direct - attach a network device to a given PHY device pointer
- * @dev: network device to attach
- * @phydev: Pointer to phy_device to attach
- * @flags: PHY device's dev_flags
- * @interface: PHY device's interface
- *
- * Description: Called by drivers to attach to a particular PHY
- * device. The phy_device is found, and properly hooked up
- * to the phy_driver. If no driver is attached, then a
- * generic driver is used. The phy_device is given a ptr to
- * the attaching device, and given a callback for link status
- * change. The phy_device is returned to the attaching driver.
- * This function takes a reference on the phy device.
- */
- int phy_attach_direct(struct net_device *dev, struct phy_device *phydev,
- u32 flags, phy_interface_t interface)
- {
- struct mii_bus *bus = phydev->mdio.bus;
- struct device *d = &phydev->mdio.dev;
- struct module *ndev_owner = NULL;
- bool using_genphy = false;
- int err;
- /* For Ethernet device drivers that register their own MDIO bus, we
- * will have bus->owner match ndev_mod, so we do not want to increment
- * our own module->refcnt here, otherwise we would not be able to
- * unload later on.
- */
- if (dev)
- ndev_owner = dev->dev.parent->driver->owner;
- if (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
- phydev_err(phydev, "failed to get the bus module\n");
- return -EIO;
- }
- get_device(d);
- /* Assume that if there is no driver, that it doesn't
- * exist, and we should use the genphy driver.
- */
- if (!d->driver) {
- if (phydev->is_c45)
- d->driver = &genphy_c45_driver.mdiodrv.driver;
- else
- d->driver = &genphy_driver.mdiodrv.driver;
- using_genphy = true;
- }
- if (!try_module_get(d->driver->owner)) {
- phydev_err(phydev, "failed to get the device driver module\n");
- err = -EIO;
- goto error_put_device;
- }
- if (using_genphy) {
- err = d->driver->probe(d);
- if (err >= 0)
- err = device_bind_driver(d);
- if (err)
- goto error_module_put;
- }
- if (phydev->attached_dev) {
- dev_err(&dev->dev, "PHY already attached\n");
- err = -EBUSY;
- goto error;
- }
- phydev->phy_link_change = phy_link_change;
- if (dev) {
- phydev->attached_dev = dev;
- dev->phydev = phydev;
- }
- /* Some Ethernet drivers try to connect to a PHY device before
- * calling register_netdevice() -> netdev_register_kobject() and
- * does the dev->dev.kobj initialization. Here we only check for
- * success which indicates that the network device kobject is
- * ready. Once we do that we still need to keep track of whether
- * links were successfully set up or not for phy_detach() to
- * remove them accordingly.
- */
- phydev->sysfs_links = false;
- phy_sysfs_create_links(phydev);
- if (!phydev->attached_dev) {
- err = sysfs_create_file(&phydev->mdio.dev.kobj,
- &dev_attr_phy_standalone.attr);
- if (err)
- phydev_err(phydev, "error creating 'phy_standalone' sysfs entry\n");
- }
- phydev->dev_flags = flags;
- phydev->interface = interface;
- phydev->state = PHY_READY;
- /* Initial carrier state is off as the phy is about to be
- * (re)initialized.
- */
- if (dev)
- netif_carrier_off(phydev->attached_dev);
- /* Do initial configuration here, now that
- * we have certain key parameters
- * (dev_flags and interface)
- */
- err = phy_init_hw(phydev);
- if (err)
- goto error;
- phy_resume(phydev);
- phy_led_triggers_register(phydev);
- return err;
- error:
- /* phy_detach() does all of the cleanup below */
- phy_detach(phydev);
- return err;
- error_module_put:
- module_put(d->driver->owner);
- error_put_device:
- put_device(d);
- if (ndev_owner != bus->owner)
- module_put(bus->owner);
- return err;
- }
- EXPORT_SYMBOL(phy_attach_direct);
- /**
- * phy_attach - attach a network device to a particular PHY device
- * @dev: network device to attach
- * @bus_id: Bus ID of PHY device to attach
- * @interface: PHY device's interface
- *
- * Description: Same as phy_attach_direct() except that a PHY bus_id
- * string is passed instead of a pointer to a struct phy_device.
- */
- struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
- phy_interface_t interface)
- {
- struct bus_type *bus = &mdio_bus_type;
- struct phy_device *phydev;
- struct device *d;
- int rc;
- if (!dev)
- return ERR_PTR(-EINVAL);
- /* Search the list of PHY devices on the mdio bus for the
- * PHY with the requested name
- */
- d = bus_find_device_by_name(bus, NULL, bus_id);
- if (!d) {
- pr_err("PHY %s not found\n", bus_id);
- return ERR_PTR(-ENODEV);
- }
- phydev = to_phy_device(d);
- rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
- put_device(d);
- if (rc)
- return ERR_PTR(rc);
- return phydev;
- }
- EXPORT_SYMBOL(phy_attach);
- static bool phy_driver_is_genphy_kind(struct phy_device *phydev,
- struct device_driver *driver)
- {
- struct device *d = &phydev->mdio.dev;
- bool ret = false;
- if (!phydev->drv)
- return ret;
- get_device(d);
- ret = d->driver == driver;
- put_device(d);
- return ret;
- }
- bool phy_driver_is_genphy(struct phy_device *phydev)
- {
- return phy_driver_is_genphy_kind(phydev,
- &genphy_driver.mdiodrv.driver);
- }
- EXPORT_SYMBOL_GPL(phy_driver_is_genphy);
- bool phy_driver_is_genphy_10g(struct phy_device *phydev)
- {
- return phy_driver_is_genphy_kind(phydev,
- &genphy_c45_driver.mdiodrv.driver);
- }
- EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g);
- /**
- * phy_detach - detach a PHY device from its network device
- * @phydev: target phy_device struct
- *
- * This detaches the phy device from its network device and the phy
- * driver, and drops the reference count taken in phy_attach_direct().
- */
- void phy_detach(struct phy_device *phydev)
- {
- struct net_device *dev = phydev->attached_dev;
- struct module *ndev_owner = NULL;
- struct mii_bus *bus;
- if (phydev->sysfs_links) {
- if (dev)
- sysfs_remove_link(&dev->dev.kobj, "phydev");
- sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");
- }
- if (!phydev->attached_dev)
- sysfs_remove_file(&phydev->mdio.dev.kobj,
- &dev_attr_phy_standalone.attr);
- phy_suspend(phydev);
- if (dev) {
- phydev->attached_dev->phydev = NULL;
- phydev->attached_dev = NULL;
- }
- phydev->phylink = NULL;
- phy_led_triggers_unregister(phydev);
- if (phydev->mdio.dev.driver)
- module_put(phydev->mdio.dev.driver->owner);
- /* If the device had no specific driver before (i.e. - it
- * was using the generic driver), we unbind the device
- * from the generic driver so that there's a chance a
- * real driver could be loaded
- */
- if (phy_driver_is_genphy(phydev) ||
- phy_driver_is_genphy_10g(phydev))
- device_release_driver(&phydev->mdio.dev);
- /*
- * The phydev might go away on the put_device() below, so avoid
- * a use-after-free bug by reading the underlying bus first.
- */
- bus = phydev->mdio.bus;
- put_device(&phydev->mdio.dev);
- if (dev)
- ndev_owner = dev->dev.parent->driver->owner;
- if (ndev_owner != bus->owner)
- module_put(bus->owner);
- /* Assert the reset signal */
- phy_device_reset(phydev, 1);
- }
- EXPORT_SYMBOL(phy_detach);
- int phy_suspend(struct phy_device *phydev)
- {
- struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
- struct net_device *netdev = phydev->attached_dev;
- struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
- int ret = 0;
- /* If the device has WOL enabled, we cannot suspend the PHY */
- phy_ethtool_get_wol(phydev, &wol);
- if (wol.wolopts || (netdev && netdev->wol_enabled))
- return -EBUSY;
- if (phydev->drv && phydrv->suspend)
- ret = phydrv->suspend(phydev);
- if (ret)
- return ret;
- phydev->suspended = true;
- return ret;
- }
- EXPORT_SYMBOL(phy_suspend);
- int __phy_resume(struct phy_device *phydev)
- {
- struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
- int ret = 0;
- WARN_ON(!mutex_is_locked(&phydev->lock));
- if (phydev->drv && phydrv->resume)
- ret = phydrv->resume(phydev);
- if (ret)
- return ret;
- phydev->suspended = false;
- return ret;
- }
- EXPORT_SYMBOL(__phy_resume);
- int phy_resume(struct phy_device *phydev)
- {
- int ret;
- mutex_lock(&phydev->lock);
- ret = __phy_resume(phydev);
- mutex_unlock(&phydev->lock);
- return ret;
- }
- EXPORT_SYMBOL(phy_resume);
- int phy_loopback(struct phy_device *phydev, bool enable)
- {
- struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
- int ret = 0;
- mutex_lock(&phydev->lock);
- if (enable && phydev->loopback_enabled) {
- ret = -EBUSY;
- goto out;
- }
- if (!enable && !phydev->loopback_enabled) {
- ret = -EINVAL;
- goto out;
- }
- if (phydev->drv && phydrv->set_loopback)
- ret = phydrv->set_loopback(phydev, enable);
- else
- ret = -EOPNOTSUPP;
- if (ret)
- goto out;
- phydev->loopback_enabled = enable;
- out:
- mutex_unlock(&phydev->lock);
- return ret;
- }
- EXPORT_SYMBOL(phy_loopback);
- /**
- * phy_reset_after_clk_enable - perform a PHY reset if needed
- * @phydev: target phy_device struct
- *
- * Description: Some PHYs are known to need a reset after their refclk was
- * enabled. This function evaluates the flags and perform the reset if it's
- * needed. Returns < 0 on error, 0 if the phy wasn't reset and 1 if the phy
- * was reset.
- */
- int phy_reset_after_clk_enable(struct phy_device *phydev)
- {
- if (!phydev || !phydev->drv)
- return -ENODEV;
- if (phydev->drv->flags & PHY_RST_AFTER_CLK_EN) {
- phy_device_reset(phydev, 1);
- phy_device_reset(phydev, 0);
- return 1;
- }
- return 0;
- }
- EXPORT_SYMBOL(phy_reset_after_clk_enable);
- /* Generic PHY support and helper functions */
- /**
- * genphy_config_advert - sanitize and advertise auto-negotiation parameters
- * @phydev: target phy_device struct
- *
- * Description: Writes MII_ADVERTISE with the appropriate values,
- * after sanitizing the values to make sure we only advertise
- * what is supported. Returns < 0 on error, 0 if the PHY's advertisement
- * hasn't changed, and > 0 if it has changed.
- */
- static int genphy_config_advert(struct phy_device *phydev)
- {
- int err, bmsr, changed = 0;
- u32 adv;
- /* Only allow advertising what this PHY supports */
- linkmode_and(phydev->advertising, phydev->advertising,
- phydev->supported);
- adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
- /* Setup standard advertisement */
- err = phy_modify_changed(phydev, MII_ADVERTISE,
- ADVERTISE_ALL | ADVERTISE_100BASE4 |
- ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
- adv);
- if (err < 0)
- return err;
- if (err > 0)
- changed = 1;
- bmsr = phy_read(phydev, MII_BMSR);
- if (bmsr < 0)
- return bmsr;
- /* Per 802.3-2008, Section 22.2.4.2.16 Extended status all
- * 1000Mbits/sec capable PHYs shall have the BMSR_ESTATEN bit set to a
- * logical 1.
- */
- if (!(bmsr & BMSR_ESTATEN))
- return changed;
- adv = linkmode_adv_to_mii_ctrl1000_t(phydev->advertising);
- err = phy_modify_changed(phydev, MII_CTRL1000,
- ADVERTISE_1000FULL | ADVERTISE_1000HALF,
- adv);
- if (err < 0)
- return err;
- if (err > 0)
- changed = 1;
- return changed;
- }
- /**
- * genphy_config_eee_advert - disable unwanted eee mode advertisement
- * @phydev: target phy_device struct
- *
- * Description: Writes MDIO_AN_EEE_ADV after disabling unsupported energy
- * efficent ethernet modes. Returns 0 if the PHY's advertisement hasn't
- * changed, and 1 if it has changed.
- */
- int genphy_config_eee_advert(struct phy_device *phydev)
- {
- int err;
- /* Nothing to disable */
- if (!phydev->eee_broken_modes)
- return 0;
- err = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_EEE_ADV,
- phydev->eee_broken_modes, 0);
- /* If the call failed, we assume that EEE is not supported */
- return err < 0 ? 0 : err;
- }
- EXPORT_SYMBOL(genphy_config_eee_advert);
- /**
- * genphy_setup_forced - configures/forces speed/duplex from @phydev
- * @phydev: target phy_device struct
- *
- * Description: Configures MII_BMCR to force speed/duplex
- * to the values in phydev. Assumes that the values are valid.
- * Please see phy_sanitize_settings().
- */
- int genphy_setup_forced(struct phy_device *phydev)
- {
- u16 ctl = 0;
- phydev->pause = 0;
- phydev->asym_pause = 0;
- if (SPEED_1000 == phydev->speed)
- ctl |= BMCR_SPEED1000;
- else if (SPEED_100 == phydev->speed)
- ctl |= BMCR_SPEED100;
- if (DUPLEX_FULL == phydev->duplex)
- ctl |= BMCR_FULLDPLX;
- return phy_modify(phydev, MII_BMCR,
- ~(BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN), ctl);
- }
- EXPORT_SYMBOL(genphy_setup_forced);
- /**
- * genphy_restart_aneg - Enable and Restart Autonegotiation
- * @phydev: target phy_device struct
- */
- int genphy_restart_aneg(struct phy_device *phydev)
- {
- /* Don't isolate the PHY if we're negotiating */
- return phy_modify(phydev, MII_BMCR, BMCR_ISOLATE,
- BMCR_ANENABLE | BMCR_ANRESTART);
- }
- EXPORT_SYMBOL(genphy_restart_aneg);
- /**
- * __genphy_config_aneg - restart auto-negotiation or write BMCR
- * @phydev: target phy_device struct
- * @changed: whether autoneg is requested
- *
- * Description: If auto-negotiation is enabled, we configure the
- * advertising, and then restart auto-negotiation. If it is not
- * enabled, then we write the BMCR.
- */
- int __genphy_config_aneg(struct phy_device *phydev, bool changed)
- {
- int err;
- if (genphy_config_eee_advert(phydev))
- changed = true;
- if (AUTONEG_ENABLE != phydev->autoneg)
- return genphy_setup_forced(phydev);
- err = genphy_config_advert(phydev);
- if (err < 0) /* error */
- return err;
- else if (err)
- changed = true;
- if (!changed) {
- /* Advertisement hasn't changed, but maybe aneg was never on to
- * begin with? Or maybe phy was isolated?
- */
- int ctl = phy_read(phydev, MII_BMCR);
- if (ctl < 0)
- return ctl;
- if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
- changed = true; /* do restart aneg */
- }
- /* Only restart aneg if we are advertising something different
- * than we were before.
- */
- return changed ? genphy_restart_aneg(phydev) : 0;
- }
- EXPORT_SYMBOL(__genphy_config_aneg);
- /**
- * genphy_aneg_done - return auto-negotiation status
- * @phydev: target phy_device struct
- *
- * Description: Reads the status register and returns 0 either if
- * auto-negotiation is incomplete, or if there was an error.
- * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
- */
- int genphy_aneg_done(struct phy_device *phydev)
- {
- int retval = phy_read(phydev, MII_BMSR);
- return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
- }
- EXPORT_SYMBOL(genphy_aneg_done);
- /**
- * genphy_update_link - update link status in @phydev
- * @phydev: target phy_device struct
- *
- * Description: Update the value in phydev->link to reflect the
- * current link value. In order to do this, we need to read
- * the status register twice, keeping the second value.
- */
- int genphy_update_link(struct phy_device *phydev)
- {
- int status = 0, bmcr;
- bmcr = phy_read(phydev, MII_BMCR);
- if (bmcr < 0)
- return bmcr;
- /* Autoneg is being started, therefore disregard BMSR value and
- * report link as down.
- */
- if (bmcr & BMCR_ANRESTART)
- goto done;
- /* The link state is latched low so that momentary link
- * drops can be detected. Do not double-read the status
- * in polling mode to detect such short link drops except
- * the link was already down.
- */
- if (!phy_polling_mode(phydev) || !phydev->link) {
- status = phy_read(phydev, MII_BMSR);
- if (status < 0)
- return status;
- else if (status & BMSR_LSTATUS)
- goto done;
- }
- /* Read link and autonegotiation status */
- status = phy_read(phydev, MII_BMSR);
- if (status < 0)
- return status;
- done:
- phydev->link = status & BMSR_LSTATUS ? 1 : 0;
- phydev->autoneg_complete = status & BMSR_ANEGCOMPLETE ? 1 : 0;
- /* Consider the case that autoneg was started and "aneg complete"
- * bit has been reset, but "link up" bit not yet.
- */
- if (phydev->autoneg == AUTONEG_ENABLE && !phydev->autoneg_complete)
- phydev->link = 0;
- return 0;
- }
- EXPORT_SYMBOL(genphy_update_link);
- int genphy_read_lpa(struct phy_device *phydev)
- {
- int lpa, lpagb;
- if (phydev->autoneg == AUTONEG_ENABLE) {
- if (!phydev->autoneg_complete) {
- mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
- 0);
- mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, 0);
- return 0;
- }
- if (phydev->is_gigabit_capable) {
- lpagb = phy_read(phydev, MII_STAT1000);
- if (lpagb < 0)
- return lpagb;
- if (lpagb & LPA_1000MSFAIL) {
- int adv = phy_read(phydev, MII_CTRL1000);
- if (adv < 0)
- return adv;
- if (adv & CTL1000_ENABLE_MASTER)
- phydev_err(phydev, "Master/Slave resolution failed, maybe conflicting manual settings?\n");
- else
- phydev_err(phydev, "Master/Slave resolution failed\n");
- return -ENOLINK;
- }
- mii_stat1000_mod_linkmode_lpa_t(phydev->lp_advertising,
- lpagb);
- }
- lpa = phy_read(phydev, MII_LPA);
- if (lpa < 0)
- return lpa;
- mii_lpa_mod_linkmode_lpa_t(phydev->lp_advertising, lpa);
- } else {
- linkmode_zero(phydev->lp_advertising);
- }
- return 0;
- }
- EXPORT_SYMBOL(genphy_read_lpa);
- /**
- * genphy_read_status - check the link status and update current link state
- * @phydev: target phy_device struct
- *
- * Description: Check the link, then figure out the current state
- * by comparing what we advertise with what the link partner
- * advertises. Start by checking the gigabit possibilities,
- * then move on to 10/100.
- */
- int genphy_read_status(struct phy_device *phydev)
- {
- int err, old_link = phydev->link;
- /* Update the link, but return if there was an error */
- err = genphy_update_link(phydev);
- if (err)
- return err;
- /* why bother the PHY if nothing can have changed */
- if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
- return 0;
- phydev->speed = SPEED_UNKNOWN;
- phydev->duplex = DUPLEX_UNKNOWN;
- phydev->pause = 0;
- phydev->asym_pause = 0;
- err = genphy_read_lpa(phydev);
- if (err < 0)
- return err;
- if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
- phy_resolve_aneg_linkmode(phydev);
- } else if (phydev->autoneg == AUTONEG_DISABLE) {
- int bmcr = phy_read(phydev, MII_BMCR);
- if (bmcr < 0)
- return bmcr;
- if (bmcr & BMCR_FULLDPLX)
- phydev->duplex = DUPLEX_FULL;
- else
- phydev->duplex = DUPLEX_HALF;
- if (bmcr & BMCR_SPEED1000)
- phydev->speed = SPEED_1000;
- else if (bmcr & BMCR_SPEED100)
- phydev->speed = SPEED_100;
- else
- phydev->speed = SPEED_10;
- }
- return 0;
- }
- EXPORT_SYMBOL(genphy_read_status);
- /**
- * genphy_soft_reset - software reset the PHY via BMCR_RESET bit
- * @phydev: target phy_device struct
- *
- * Description: Perform a software PHY reset using the standard
- * BMCR_RESET bit and poll for the reset bit to be cleared.
- *
- * Returns: 0 on success, < 0 on failure
- */
- int genphy_soft_reset(struct phy_device *phydev)
- {
- u16 res = BMCR_RESET;
- int ret;
- if (phydev->autoneg == AUTONEG_ENABLE)
- res |= BMCR_ANRESTART;
- ret = phy_modify(phydev, MII_BMCR, BMCR_ISOLATE, res);
- if (ret < 0)
- return ret;
- ret = phy_poll_reset(phydev);
- if (ret)
- return ret;
- /* BMCR may be reset to defaults */
- if (phydev->autoneg == AUTONEG_DISABLE)
- ret = genphy_setup_forced(phydev);
- return ret;
- }
- EXPORT_SYMBOL(genphy_soft_reset);
- /**
- * genphy_read_abilities - read PHY abilities from Clause 22 registers
- * @phydev: target phy_device struct
- *
- * Description: Reads the PHY's abilities and populates
- * phydev->supported accordingly.
- *
- * Returns: 0 on success, < 0 on failure
- */
- int genphy_read_abilities(struct phy_device *phydev)
- {
- int val;
- linkmode_set_bit_array(phy_basic_ports_array,
- ARRAY_SIZE(phy_basic_ports_array),
- phydev->supported);
- val = phy_read(phydev, MII_BMSR);
- if (val < 0)
- return val;
- linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,
- val & BMSR_ANEGCAPABLE);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,
- val & BMSR_100FULL);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,
- val & BMSR_100HALF);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,
- val & BMSR_10FULL);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,
- val & BMSR_10HALF);
- if (val & BMSR_ESTATEN) {
- val = phy_read(phydev, MII_ESTATUS);
- if (val < 0)
- return val;
- linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
- phydev->supported, val & ESTATUS_1000_TFULL);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
- phydev->supported, val & ESTATUS_1000_THALF);
- linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
- phydev->supported, val & ESTATUS_1000_XFULL);
- }
- return 0;
- }
- EXPORT_SYMBOL(genphy_read_abilities);
- /* This is used for the phy device which doesn't support the MMD extended
- * register access, but it does have side effect when we are trying to access
- * the MMD register via indirect method.
- */
- int genphy_read_mmd_unsupported(struct phy_device *phdev, int devad, u16 regnum)
- {
- return -EOPNOTSUPP;
- }
- EXPORT_SYMBOL(genphy_read_mmd_unsupported);
- int genphy_write_mmd_unsupported(struct phy_device *phdev, int devnum,
- u16 regnum, u16 val)
- {
- return -EOPNOTSUPP;
- }
- EXPORT_SYMBOL(genphy_write_mmd_unsupported);
- int genphy_suspend(struct phy_device *phydev)
- {
- return phy_set_bits(phydev, MII_BMCR, BMCR_PDOWN);
- }
- EXPORT_SYMBOL(genphy_suspend);
- int genphy_resume(struct phy_device *phydev)
- {
- return phy_clear_bits(phydev, MII_BMCR, BMCR_PDOWN);
- }
- EXPORT_SYMBOL(genphy_resume);
- int genphy_loopback(struct phy_device *phydev, bool enable)
- {
- return phy_modify(phydev, MII_BMCR, BMCR_LOOPBACK,
- enable ? BMCR_LOOPBACK : 0);
- }
- EXPORT_SYMBOL(genphy_loopback);
- /**
- * phy_remove_link_mode - Remove a supported link mode
- * @phydev: phy_device structure to remove link mode from
- * @link_mode: Link mode to be removed
- *
- * Description: Some MACs don't support all link modes which the PHY
- * does. e.g. a 1G MAC often does not support 1000Half. Add a helper
- * to remove a link mode.
- */
- void phy_remove_link_mode(struct phy_device *phydev, u32 link_mode)
- {
- linkmode_clear_bit(link_mode, phydev->supported);
- phy_advertise_supported(phydev);
- }
- EXPORT_SYMBOL(phy_remove_link_mode);
- static void phy_copy_pause_bits(unsigned long *dst, unsigned long *src)
- {
- linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, dst,
- linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, src));
- linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, dst,
- linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, src));
- }
- /**
- * phy_advertise_supported - Advertise all supported modes
- * @phydev: target phy_device struct
- *
- * Description: Called to advertise all supported modes, doesn't touch
- * pause mode advertising.
- */
- void phy_advertise_supported(struct phy_device *phydev)
- {
- __ETHTOOL_DECLARE_LINK_MODE_MASK(new);
- linkmode_copy(new, phydev->supported);
- phy_copy_pause_bits(new, phydev->advertising);
- linkmode_copy(phydev->advertising, new);
- }
- EXPORT_SYMBOL(phy_advertise_supported);
- /**
- * phy_support_sym_pause - Enable support of symmetrical pause
- * @phydev: target phy_device struct
- *
- * Description: Called by the MAC to indicate is supports symmetrical
- * Pause, but not asym pause.
- */
- void phy_support_sym_pause(struct phy_device *phydev)
- {
- linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);
- phy_copy_pause_bits(phydev->advertising, phydev->supported);
- }
- EXPORT_SYMBOL(phy_support_sym_pause);
- /**
- * phy_support_asym_pause - Enable support of asym pause
- * @phydev: target phy_device struct
- *
- * Description: Called by the MAC to indicate is supports Asym Pause.
- */
- void phy_support_asym_pause(struct phy_device *phydev)
- {
- phy_copy_pause_bits(phydev->advertising, phydev->supported);
- }
- EXPORT_SYMBOL(phy_support_asym_pause);
- /**
- * phy_set_sym_pause - Configure symmetric Pause
- * @phydev: target phy_device struct
- * @rx: Receiver Pause is supported
- * @tx: Transmit Pause is supported
- * @autoneg: Auto neg should be used
- *
- * Description: Configure advertised Pause support depending on if
- * receiver pause and pause auto neg is supported. Generally called
- * from the set_pauseparam .ndo.
- */
- void phy_set_sym_pause(struct phy_device *phydev, bool rx, bool tx,
- bool autoneg)
- {
- linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);
- if (rx && tx && autoneg)
- linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
- phydev->supported);
- linkmode_copy(phydev->advertising, phydev->supported);
- }
- EXPORT_SYMBOL(phy_set_sym_pause);
- /**
- * phy_set_asym_pause - Configure Pause and Asym Pause
- * @phydev: target phy_device struct
- * @rx: Receiver Pause is supported
- * @tx: Transmit Pause is supported
- *
- * Description: Configure advertised Pause support depending on if
- * transmit and receiver pause is supported. If there has been a
- * change in adverting, trigger a new autoneg. Generally called from
- * the set_pauseparam .ndo.
- */
- void phy_set_asym_pause(struct phy_device *phydev, bool rx, bool tx)
- {
- __ETHTOOL_DECLARE_LINK_MODE_MASK(oldadv);
- linkmode_copy(oldadv, phydev->advertising);
- linkmode_clear_bit(ETHTOOL_LINK_MODE_Pause_BIT,
- phydev->advertising);
- linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
- phydev->advertising);
- if (rx) {
- linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
- phydev->advertising);
- linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
- phydev->advertising);
- }
- if (tx)
- linkmode_change_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
- phydev->advertising);
- if (!linkmode_equal(oldadv, phydev->advertising) &&
- phydev->autoneg)
- phy_start_aneg(phydev);
- }
- EXPORT_SYMBOL(phy_set_asym_pause);
- /**
- * phy_validate_pause - Test if the PHY/MAC support the pause configuration
- * @phydev: phy_device struct
- * @pp: requested pause configuration
- *
- * Description: Test if the PHY/MAC combination supports the Pause
- * configuration the user is requesting. Returns True if it is
- * supported, false otherwise.
- */
- bool phy_validate_pause(struct phy_device *phydev,
- struct ethtool_pauseparam *pp)
- {
- if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
- phydev->supported) && pp->rx_pause)
- return false;
- if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
- phydev->supported) &&
- pp->rx_pause != pp->tx_pause)
- return false;
- return true;
- }
- EXPORT_SYMBOL(phy_validate_pause);
- static bool phy_drv_supports_irq(struct phy_driver *phydrv)
- {
- return phydrv->config_intr && phydrv->ack_interrupt;
- }
- /**
- * phy_probe - probe and init a PHY device
- * @dev: device to probe and init
- *
- * Description: Take care of setting up the phy_device structure,
- * set the state to READY (the driver's init function should
- * set it to STARTING if needed).
- */
- static int phy_probe(struct device *dev)
- {
- struct phy_device *phydev = to_phy_device(dev);
- struct device_driver *drv = phydev->mdio.dev.driver;
- struct phy_driver *phydrv = to_phy_driver(drv);
- int err = 0;
- phydev->drv = phydrv;
- /* Disable the interrupt if the PHY doesn't support it
- * but the interrupt is still a valid one
- */
- if (!phy_drv_supports_irq(phydrv) && phy_interrupt_is_valid(phydev))
- phydev->irq = PHY_POLL;
- if (phydrv->flags & PHY_IS_INTERNAL)
- phydev->is_internal = true;
- mutex_lock(&phydev->lock);
- if (phydev->drv->probe) {
- /* Deassert the reset signal */
- phy_device_reset(phydev, 0);
- err = phydev->drv->probe(phydev);
- if (err) {
- /* Assert the reset signal */
- phy_device_reset(phydev, 1);
- goto out;
- }
- }
- /* Start out supporting everything. Eventually,
- * a controller will attach, and may modify one
- * or both of these values
- */
- if (phydrv->features) {
- linkmode_copy(phydev->supported, phydrv->features);
- } else if (phydrv->get_features) {
- err = phydrv->get_features(phydev);
- } else if (phydev->is_c45) {
- err = genphy_c45_pma_read_abilities(phydev);
- } else {
- err = genphy_read_abilities(phydev);
- }
- if (err)
- goto out;
- if (!linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
- phydev->supported))
- phydev->autoneg = 0;
- if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
- phydev->supported))
- phydev->is_gigabit_capable = 1;
- if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
- phydev->supported))
- phydev->is_gigabit_capable = 1;
- of_set_phy_supported(phydev);
- phy_advertise_supported(phydev);
- /* Get the EEE modes we want to prohibit. We will ask
- * the PHY stop advertising these mode later on
- */
- of_set_phy_eee_broken(phydev);
- /* The Pause Frame bits indicate that the PHY can support passing
- * pause frames. During autonegotiation, the PHYs will determine if
- * they should allow pause frames to pass. The MAC driver should then
- * use that result to determine whether to enable flow control via
- * pause frames.
- *
- * Normally, PHY drivers should not set the Pause bits, and instead
- * allow phylib to do that. However, there may be some situations
- * (e.g. hardware erratum) where the driver wants to set only one
- * of these bits.
- */
- if (!test_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported) &&
- !test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported)) {
- linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT,
- phydev->supported);
- linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
- phydev->supported);
- }
- /* Set the state to READY by default */
- phydev->state = PHY_READY;
- out:
- mutex_unlock(&phydev->lock);
- return err;
- }
- static int phy_remove(struct device *dev)
- {
- struct phy_device *phydev = to_phy_device(dev);
- cancel_delayed_work_sync(&phydev->state_queue);
- mutex_lock(&phydev->lock);
- phydev->state = PHY_DOWN;
- mutex_unlock(&phydev->lock);
- if (phydev->drv && phydev->drv->remove) {
- phydev->drv->remove(phydev);
- /* Assert the reset signal */
- phy_device_reset(phydev, 1);
- }
- phydev->drv = NULL;
- return 0;
- }
- /**
- * phy_driver_register - register a phy_driver with the PHY layer
- * @new_driver: new phy_driver to register
- * @owner: module owning this PHY
- */
- int phy_driver_register(struct phy_driver *new_driver, struct module *owner)
- {
- int retval;
- /* Either the features are hard coded, or dynamically
- * determined. It cannot be both.
- */
- if (WARN_ON(new_driver->features && new_driver->get_features)) {
- pr_err("%s: features and get_features must not both be set\n",
- new_driver->name);
- return -EINVAL;
- }
- new_driver->mdiodrv.flags |= MDIO_DEVICE_IS_PHY;
- new_driver->mdiodrv.driver.name = new_driver->name;
- new_driver->mdiodrv.driver.bus = &mdio_bus_type;
- new_driver->mdiodrv.driver.probe = phy_probe;
- new_driver->mdiodrv.driver.remove = phy_remove;
- new_driver->mdiodrv.driver.owner = owner;
- retval = driver_register(&new_driver->mdiodrv.driver);
- if (retval) {
- pr_err("%s: Error %d in registering driver\n",
- new_driver->name, retval);
- return retval;
- }
- pr_debug("%s: Registered new driver\n", new_driver->name);
- return 0;
- }
- EXPORT_SYMBOL(phy_driver_register);
- int phy_drivers_register(struct phy_driver *new_driver, int n,
- struct module *owner)
- {
- int i, ret = 0;
- for (i = 0; i < n; i++) {
- ret = phy_driver_register(new_driver + i, owner);
- if (ret) {
- while (i-- > 0)
- phy_driver_unregister(new_driver + i);
- break;
- }
- }
- return ret;
- }
- EXPORT_SYMBOL(phy_drivers_register);
- void phy_driver_unregister(struct phy_driver *drv)
- {
- driver_unregister(&drv->mdiodrv.driver);
- }
- EXPORT_SYMBOL(phy_driver_unregister);
- void phy_drivers_unregister(struct phy_driver *drv, int n)
- {
- int i;
- for (i = 0; i < n; i++)
- phy_driver_unregister(drv + i);
- }
- EXPORT_SYMBOL(phy_drivers_unregister);
- static struct phy_driver genphy_driver = {
- .phy_id = 0xffffffff,
- .phy_id_mask = 0xffffffff,
- .name = "Generic PHY",
- .soft_reset = genphy_no_soft_reset,
- .get_features = genphy_read_abilities,
- .aneg_done = genphy_aneg_done,
- .suspend = genphy_suspend,
- .resume = genphy_resume,
- .set_loopback = genphy_loopback,
- };
- static int __init phy_init(void)
- {
- int rc;
- rc = mdio_bus_init();
- if (rc)
- return rc;
- features_init();
- rc = phy_driver_register(&genphy_c45_driver, THIS_MODULE);
- if (rc)
- goto err_c45;
- rc = phy_driver_register(&genphy_driver, THIS_MODULE);
- if (rc) {
- phy_driver_unregister(&genphy_c45_driver);
- err_c45:
- mdio_bus_exit();
- }
- return rc;
- }
- static void __exit phy_exit(void)
- {
- phy_driver_unregister(&genphy_c45_driver);
- phy_driver_unregister(&genphy_driver);
- mdio_bus_exit();
- }
- subsys_initcall(phy_init);
- module_exit(phy_exit);
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