mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-10 18:26:39 +07:00
57f3986231
The patches regarding eee-broken-modes was merged before all people involved could find an agreement on the best way to move forward. While we agreed on having a DT property to mark particular modes as broken, the value used for eee-broken-modes mapped the phy register in very direct way. Because of this, the concern is that it could be used to implement configuration policies instead of describing a broken HW. In the end, having a boolean property for each mode seems to be preferred over one bit field value mapping the register (too) directly. Cc: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1894 lines
47 KiB
C
1894 lines
47 KiB
C
/* Framework for finding and configuring PHYs.
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* Also contains generic PHY driver
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*
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* Author: Andy Fleming
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*
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* Copyright (c) 2004 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <linux/phy_led_triggers.h>
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#include <linux/mdio.h>
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#include <linux/io.h>
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#include <linux/uaccess.h>
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#include <linux/of.h>
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#include <asm/irq.h>
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MODULE_DESCRIPTION("PHY library");
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MODULE_AUTHOR("Andy Fleming");
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MODULE_LICENSE("GPL");
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void phy_device_free(struct phy_device *phydev)
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{
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put_device(&phydev->mdio.dev);
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}
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EXPORT_SYMBOL(phy_device_free);
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static void phy_mdio_device_free(struct mdio_device *mdiodev)
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{
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struct phy_device *phydev;
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phydev = container_of(mdiodev, struct phy_device, mdio);
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phy_device_free(phydev);
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}
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static void phy_device_release(struct device *dev)
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{
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kfree(to_phy_device(dev));
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}
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static void phy_mdio_device_remove(struct mdio_device *mdiodev)
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{
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struct phy_device *phydev;
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phydev = container_of(mdiodev, struct phy_device, mdio);
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phy_device_remove(phydev);
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}
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enum genphy_driver {
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GENPHY_DRV_1G,
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GENPHY_DRV_10G,
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GENPHY_DRV_MAX
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};
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static struct phy_driver genphy_driver[GENPHY_DRV_MAX];
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static LIST_HEAD(phy_fixup_list);
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static DEFINE_MUTEX(phy_fixup_lock);
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#ifdef CONFIG_PM
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static bool mdio_bus_phy_may_suspend(struct phy_device *phydev)
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{
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struct device_driver *drv = phydev->mdio.dev.driver;
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struct phy_driver *phydrv = to_phy_driver(drv);
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struct net_device *netdev = phydev->attached_dev;
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if (!drv || !phydrv->suspend)
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return false;
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/* PHY not attached? May suspend if the PHY has not already been
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* suspended as part of a prior call to phy_disconnect() ->
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* phy_detach() -> phy_suspend() because the parent netdev might be the
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* MDIO bus driver and clock gated at this point.
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*/
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if (!netdev)
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return !phydev->suspended;
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/* Don't suspend PHY if the attached netdev parent may wakeup.
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* The parent may point to a PCI device, as in tg3 driver.
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*/
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if (netdev->dev.parent && device_may_wakeup(netdev->dev.parent))
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return false;
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/* Also don't suspend PHY if the netdev itself may wakeup. This
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* is the case for devices w/o underlaying pwr. mgmt. aware bus,
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* e.g. SoC devices.
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*/
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if (device_may_wakeup(&netdev->dev))
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return false;
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return true;
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}
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static int mdio_bus_phy_suspend(struct device *dev)
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{
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struct phy_device *phydev = to_phy_device(dev);
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/* We must stop the state machine manually, otherwise it stops out of
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* control, possibly with the phydev->lock held. Upon resume, netdev
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* may call phy routines that try to grab the same lock, and that may
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* lead to a deadlock.
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*/
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if (phydev->attached_dev && phydev->adjust_link)
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phy_stop_machine(phydev);
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if (!mdio_bus_phy_may_suspend(phydev))
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return 0;
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return phy_suspend(phydev);
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}
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static int mdio_bus_phy_resume(struct device *dev)
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{
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struct phy_device *phydev = to_phy_device(dev);
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int ret;
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if (!mdio_bus_phy_may_suspend(phydev))
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goto no_resume;
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ret = phy_resume(phydev);
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if (ret < 0)
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return ret;
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no_resume:
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if (phydev->attached_dev && phydev->adjust_link)
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phy_start_machine(phydev);
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return 0;
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}
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static int mdio_bus_phy_restore(struct device *dev)
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{
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struct phy_device *phydev = to_phy_device(dev);
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struct net_device *netdev = phydev->attached_dev;
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int ret;
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if (!netdev)
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return 0;
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ret = phy_init_hw(phydev);
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if (ret < 0)
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return ret;
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/* The PHY needs to renegotiate. */
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phydev->link = 0;
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phydev->state = PHY_UP;
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phy_start_machine(phydev);
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return 0;
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}
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static const struct dev_pm_ops mdio_bus_phy_pm_ops = {
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.suspend = mdio_bus_phy_suspend,
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.resume = mdio_bus_phy_resume,
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.freeze = mdio_bus_phy_suspend,
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.thaw = mdio_bus_phy_resume,
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.restore = mdio_bus_phy_restore,
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};
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#define MDIO_BUS_PHY_PM_OPS (&mdio_bus_phy_pm_ops)
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#else
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#define MDIO_BUS_PHY_PM_OPS NULL
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#endif /* CONFIG_PM */
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/**
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* phy_register_fixup - creates a new phy_fixup and adds it to the list
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* @bus_id: A string which matches phydev->mdio.dev.bus_id (or PHY_ANY_ID)
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* @phy_uid: Used to match against phydev->phy_id (the UID of the PHY)
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* It can also be PHY_ANY_UID
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* @phy_uid_mask: Applied to phydev->phy_id and fixup->phy_uid before
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* comparison
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* @run: The actual code to be run when a matching PHY is found
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*/
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int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
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int (*run)(struct phy_device *))
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{
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struct phy_fixup *fixup = kzalloc(sizeof(*fixup), GFP_KERNEL);
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if (!fixup)
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return -ENOMEM;
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strlcpy(fixup->bus_id, bus_id, sizeof(fixup->bus_id));
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fixup->phy_uid = phy_uid;
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fixup->phy_uid_mask = phy_uid_mask;
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fixup->run = run;
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mutex_lock(&phy_fixup_lock);
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list_add_tail(&fixup->list, &phy_fixup_list);
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mutex_unlock(&phy_fixup_lock);
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return 0;
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}
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EXPORT_SYMBOL(phy_register_fixup);
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/* Registers a fixup to be run on any PHY with the UID in phy_uid */
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int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
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int (*run)(struct phy_device *))
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{
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return phy_register_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask, run);
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}
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EXPORT_SYMBOL(phy_register_fixup_for_uid);
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/* Registers a fixup to be run on the PHY with id string bus_id */
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int phy_register_fixup_for_id(const char *bus_id,
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int (*run)(struct phy_device *))
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{
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return phy_register_fixup(bus_id, PHY_ANY_UID, 0xffffffff, run);
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}
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EXPORT_SYMBOL(phy_register_fixup_for_id);
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/**
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* phy_unregister_fixup - remove a phy_fixup from the list
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* @bus_id: A string matches fixup->bus_id (or PHY_ANY_ID) in phy_fixup_list
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* @phy_uid: A phy id matches fixup->phy_id (or PHY_ANY_UID) in phy_fixup_list
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* @phy_uid_mask: Applied to phy_uid and fixup->phy_uid before comparison
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*/
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int phy_unregister_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask)
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{
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struct list_head *pos, *n;
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struct phy_fixup *fixup;
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int ret;
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ret = -ENODEV;
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mutex_lock(&phy_fixup_lock);
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list_for_each_safe(pos, n, &phy_fixup_list) {
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fixup = list_entry(pos, struct phy_fixup, list);
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if ((!strcmp(fixup->bus_id, bus_id)) &&
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((fixup->phy_uid & phy_uid_mask) ==
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(phy_uid & phy_uid_mask))) {
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list_del(&fixup->list);
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kfree(fixup);
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ret = 0;
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break;
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}
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}
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mutex_unlock(&phy_fixup_lock);
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return ret;
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}
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EXPORT_SYMBOL(phy_unregister_fixup);
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/* Unregisters a fixup of any PHY with the UID in phy_uid */
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int phy_unregister_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask)
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{
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return phy_unregister_fixup(PHY_ANY_ID, phy_uid, phy_uid_mask);
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}
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EXPORT_SYMBOL(phy_unregister_fixup_for_uid);
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/* Unregisters a fixup of the PHY with id string bus_id */
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int phy_unregister_fixup_for_id(const char *bus_id)
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{
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return phy_unregister_fixup(bus_id, PHY_ANY_UID, 0xffffffff);
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}
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EXPORT_SYMBOL(phy_unregister_fixup_for_id);
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/* Returns 1 if fixup matches phydev in bus_id and phy_uid.
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* Fixups can be set to match any in one or more fields.
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*/
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static int phy_needs_fixup(struct phy_device *phydev, struct phy_fixup *fixup)
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{
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if (strcmp(fixup->bus_id, phydev_name(phydev)) != 0)
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if (strcmp(fixup->bus_id, PHY_ANY_ID) != 0)
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return 0;
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if ((fixup->phy_uid & fixup->phy_uid_mask) !=
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(phydev->phy_id & fixup->phy_uid_mask))
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if (fixup->phy_uid != PHY_ANY_UID)
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return 0;
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return 1;
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}
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/* Runs any matching fixups for this phydev */
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static int phy_scan_fixups(struct phy_device *phydev)
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{
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struct phy_fixup *fixup;
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mutex_lock(&phy_fixup_lock);
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list_for_each_entry(fixup, &phy_fixup_list, list) {
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if (phy_needs_fixup(phydev, fixup)) {
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int err = fixup->run(phydev);
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if (err < 0) {
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mutex_unlock(&phy_fixup_lock);
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return err;
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}
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phydev->has_fixups = true;
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}
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}
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mutex_unlock(&phy_fixup_lock);
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return 0;
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}
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static int phy_bus_match(struct device *dev, struct device_driver *drv)
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{
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struct phy_device *phydev = to_phy_device(dev);
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struct phy_driver *phydrv = to_phy_driver(drv);
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const int num_ids = ARRAY_SIZE(phydev->c45_ids.device_ids);
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int i;
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if (!(phydrv->mdiodrv.flags & MDIO_DEVICE_IS_PHY))
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return 0;
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if (phydrv->match_phy_device)
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return phydrv->match_phy_device(phydev);
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if (phydev->is_c45) {
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for (i = 1; i < num_ids; i++) {
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if (!(phydev->c45_ids.devices_in_package & (1 << i)))
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continue;
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if ((phydrv->phy_id & phydrv->phy_id_mask) ==
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(phydev->c45_ids.device_ids[i] &
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phydrv->phy_id_mask))
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return 1;
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}
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return 0;
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} else {
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return (phydrv->phy_id & phydrv->phy_id_mask) ==
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(phydev->phy_id & phydrv->phy_id_mask);
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}
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}
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struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
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bool is_c45,
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struct phy_c45_device_ids *c45_ids)
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{
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struct phy_device *dev;
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struct mdio_device *mdiodev;
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/* We allocate the device, and initialize the default values */
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dev = kzalloc(sizeof(*dev), GFP_KERNEL);
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if (!dev)
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return ERR_PTR(-ENOMEM);
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mdiodev = &dev->mdio;
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mdiodev->dev.release = phy_device_release;
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mdiodev->dev.parent = &bus->dev;
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mdiodev->dev.bus = &mdio_bus_type;
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mdiodev->bus = bus;
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mdiodev->pm_ops = MDIO_BUS_PHY_PM_OPS;
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mdiodev->bus_match = phy_bus_match;
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mdiodev->addr = addr;
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mdiodev->flags = MDIO_DEVICE_FLAG_PHY;
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mdiodev->device_free = phy_mdio_device_free;
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mdiodev->device_remove = phy_mdio_device_remove;
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dev->speed = 0;
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dev->duplex = -1;
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dev->pause = 0;
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dev->asym_pause = 0;
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dev->link = 1;
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dev->interface = PHY_INTERFACE_MODE_GMII;
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dev->autoneg = AUTONEG_ENABLE;
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dev->is_c45 = is_c45;
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dev->phy_id = phy_id;
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if (c45_ids)
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dev->c45_ids = *c45_ids;
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dev->irq = bus->irq[addr];
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dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
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dev->state = PHY_DOWN;
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mutex_init(&dev->lock);
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INIT_DELAYED_WORK(&dev->state_queue, phy_state_machine);
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INIT_WORK(&dev->phy_queue, phy_change_work);
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/* Request the appropriate module unconditionally; don't
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* bother trying to do so only if it isn't already loaded,
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* because that gets complicated. A hotplug event would have
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* done an unconditional modprobe anyway.
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* We don't do normal hotplug because it won't work for MDIO
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* -- because it relies on the device staying around for long
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* enough for the driver to get loaded. With MDIO, the NIC
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* driver will get bored and give up as soon as it finds that
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* there's no driver _already_ loaded.
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*/
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request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, MDIO_ID_ARGS(phy_id));
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device_initialize(&mdiodev->dev);
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return dev;
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}
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EXPORT_SYMBOL(phy_device_create);
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/* get_phy_c45_devs_in_pkg - reads a MMD's devices in package registers.
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* @bus: the target MII bus
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* @addr: PHY address on the MII bus
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* @dev_addr: MMD address in the PHY.
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* @devices_in_package: where to store the devices in package information.
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*
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* Description: reads devices in package registers of a MMD at @dev_addr
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* from PHY at @addr on @bus.
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*
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* Returns: 0 on success, -EIO on failure.
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*/
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static int get_phy_c45_devs_in_pkg(struct mii_bus *bus, int addr, int dev_addr,
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u32 *devices_in_package)
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{
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int phy_reg, reg_addr;
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reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS2;
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phy_reg = mdiobus_read(bus, addr, reg_addr);
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if (phy_reg < 0)
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return -EIO;
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*devices_in_package = (phy_reg & 0xffff) << 16;
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reg_addr = MII_ADDR_C45 | dev_addr << 16 | MDIO_DEVS1;
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phy_reg = mdiobus_read(bus, addr, reg_addr);
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if (phy_reg < 0)
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return -EIO;
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*devices_in_package |= (phy_reg & 0xffff);
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return 0;
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}
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/**
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* get_phy_c45_ids - reads the specified addr for its 802.3-c45 IDs.
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* @bus: the target MII bus
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* @addr: PHY address on the MII bus
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* @phy_id: where to store the ID retrieved.
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* @c45_ids: where to store the c45 ID information.
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*
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* If the PHY devices-in-package appears to be valid, it and the
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* corresponding identifiers are stored in @c45_ids, zero is stored
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* in @phy_id. Otherwise 0xffffffff is stored in @phy_id. Returns
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* zero on success.
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*
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*/
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static int get_phy_c45_ids(struct mii_bus *bus, int addr, u32 *phy_id,
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struct phy_c45_device_ids *c45_ids) {
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int phy_reg;
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int i, reg_addr;
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const int num_ids = ARRAY_SIZE(c45_ids->device_ids);
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u32 *devs = &c45_ids->devices_in_package;
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/* Find first non-zero Devices In package. Device zero is reserved
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* for 802.3 c45 complied PHYs, so don't probe it at first.
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*/
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for (i = 1; i < num_ids && *devs == 0; i++) {
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phy_reg = get_phy_c45_devs_in_pkg(bus, addr, i, devs);
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if (phy_reg < 0)
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return -EIO;
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|
|
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 & 0xffff) << 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 & 0xffff);
|
|
}
|
|
*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)
|
|
return -EIO;
|
|
|
|
*phy_id = (phy_reg & 0xffff) << 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)
|
|
return -EIO;
|
|
|
|
*phy_id |= (phy_reg & 0xffff);
|
|
|
|
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 = {0};
|
|
u32 phy_id = 0;
|
|
int r;
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/* Run all of the fixups for this PHY */
|
|
err = phy_scan_fixups(phydev);
|
|
if (err) {
|
|
pr_err("PHY %d failed to initialize\n", phydev->mdio.addr);
|
|
goto out;
|
|
}
|
|
|
|
phydev->mdio.dev.groups = phy_dev_groups;
|
|
|
|
err = device_add(&phydev->mdio.dev);
|
|
if (err) {
|
|
pr_err("PHY %d failed to add\n", phydev->mdio.addr);
|
|
goto out;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out:
|
|
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);
|
|
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);
|
|
|
|
/**
|
|
* 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;
|
|
|
|
rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
|
|
if (rc)
|
|
return rc;
|
|
|
|
phy_prepare_link(phydev, handler);
|
|
phy_start_machine(phydev);
|
|
if (phydev->irq > 0)
|
|
phy_start_interrupts(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 (phydev->irq > 0)
|
|
phy_stop_interrupts(phydev);
|
|
|
|
phy_stop_machine(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;
|
|
|
|
if (!phydev->drv || !phydev->drv->config_init)
|
|
return 0;
|
|
|
|
if (phydev->drv->soft_reset)
|
|
ret = phydev->drv->soft_reset(phydev);
|
|
else
|
|
ret = genphy_soft_reset(phydev);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = phy_scan_fixups(phydev);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return phydev->drv->config_init(phydev);
|
|
}
|
|
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=%d)"
|
|
void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
|
|
{
|
|
if (!fmt) {
|
|
dev_info(&phydev->mdio.dev, ATTACHED_FMT "\n",
|
|
phydev->drv->name, phydev_name(phydev),
|
|
phydev->irq);
|
|
} else {
|
|
va_list ap;
|
|
|
|
dev_info(&phydev->mdio.dev, ATTACHED_FMT,
|
|
phydev->drv->name, phydev_name(phydev),
|
|
phydev->irq);
|
|
|
|
va_start(ap, fmt);
|
|
vprintk(fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(phy_attached_print);
|
|
|
|
/**
|
|
* 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 module *ndev_owner = dev->dev.parent->driver->owner;
|
|
struct mii_bus *bus = phydev->mdio.bus;
|
|
struct device *d = &phydev->mdio.dev;
|
|
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 (ndev_owner != bus->owner && !try_module_get(bus->owner)) {
|
|
dev_err(&dev->dev, "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_driver[GENPHY_DRV_10G].mdiodrv.driver;
|
|
else
|
|
d->driver =
|
|
&genphy_driver[GENPHY_DRV_1G].mdiodrv.driver;
|
|
|
|
err = d->driver->probe(d);
|
|
if (err >= 0)
|
|
err = device_bind_driver(d);
|
|
|
|
if (err)
|
|
goto error;
|
|
}
|
|
|
|
if (phydev->attached_dev) {
|
|
dev_err(&dev->dev, "PHY already attached\n");
|
|
err = -EBUSY;
|
|
goto error;
|
|
}
|
|
|
|
phydev->attached_dev = dev;
|
|
dev->phydev = phydev;
|
|
|
|
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.
|
|
*/
|
|
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(phydev);
|
|
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;
|
|
|
|
/* 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);
|
|
|
|
/**
|
|
* 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 = dev->dev.parent->driver->owner;
|
|
struct mii_bus *bus;
|
|
int i;
|
|
|
|
phydev->attached_dev->phydev = NULL;
|
|
phydev->attached_dev = NULL;
|
|
phy_suspend(phydev);
|
|
|
|
phy_led_triggers_unregister(phydev);
|
|
|
|
/* 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
|
|
*/
|
|
for (i = 0; i < ARRAY_SIZE(genphy_driver); i++) {
|
|
if (phydev->mdio.dev.driver ==
|
|
&genphy_driver[i].mdiodrv.driver) {
|
|
device_release_driver(&phydev->mdio.dev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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 (ndev_owner != bus->owner)
|
|
module_put(bus->owner);
|
|
}
|
|
EXPORT_SYMBOL(phy_detach);
|
|
|
|
int phy_suspend(struct phy_device *phydev)
|
|
{
|
|
struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver);
|
|
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)
|
|
return -EBUSY;
|
|
|
|
if (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;
|
|
|
|
if (phydrv->resume)
|
|
ret = phydrv->resume(phydev);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
phydev->suspended = false;
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(phy_resume);
|
|
|
|
/* 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)
|
|
{
|
|
u32 advertise;
|
|
int oldadv, adv, bmsr;
|
|
int err, changed = 0;
|
|
|
|
/* Only allow advertising what this PHY supports */
|
|
phydev->advertising &= phydev->supported;
|
|
advertise = phydev->advertising;
|
|
|
|
/* Setup standard advertisement */
|
|
adv = phy_read(phydev, MII_ADVERTISE);
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
oldadv = adv;
|
|
adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
|
|
ADVERTISE_PAUSE_ASYM);
|
|
adv |= ethtool_adv_to_mii_adv_t(advertise);
|
|
|
|
if (adv != oldadv) {
|
|
err = phy_write(phydev, MII_ADVERTISE, adv);
|
|
|
|
if (err < 0)
|
|
return err;
|
|
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;
|
|
|
|
/* Configure gigabit if it's supported */
|
|
adv = phy_read(phydev, MII_CTRL1000);
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
oldadv = adv;
|
|
adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
|
|
|
|
if (phydev->supported & (SUPPORTED_1000baseT_Half |
|
|
SUPPORTED_1000baseT_Full)) {
|
|
adv |= ethtool_adv_to_mii_ctrl1000_t(advertise);
|
|
}
|
|
|
|
if (adv != oldadv)
|
|
changed = 1;
|
|
|
|
err = phy_write(phydev, MII_CTRL1000, adv);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
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.
|
|
*/
|
|
static int genphy_config_eee_advert(struct phy_device *phydev)
|
|
{
|
|
int broken = phydev->eee_broken_modes;
|
|
int old_adv, adv;
|
|
|
|
/* Nothing to disable */
|
|
if (!broken)
|
|
return 0;
|
|
|
|
/* If the following call fails, we assume that EEE is not
|
|
* supported by the phy. If we read 0, EEE is not advertised
|
|
* In both case, we don't need to continue
|
|
*/
|
|
adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
|
|
if (adv <= 0)
|
|
return 0;
|
|
|
|
old_adv = adv;
|
|
adv &= ~broken;
|
|
|
|
/* Advertising remains unchanged with the broken mask */
|
|
if (old_adv == adv)
|
|
return 0;
|
|
|
|
phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, adv);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
int ctl = phy_read(phydev, MII_BMCR);
|
|
|
|
ctl &= BMCR_LOOPBACK | BMCR_ISOLATE | BMCR_PDOWN;
|
|
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_write(phydev, MII_BMCR, 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)
|
|
{
|
|
int ctl = phy_read(phydev, MII_BMCR);
|
|
|
|
if (ctl < 0)
|
|
return ctl;
|
|
|
|
ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
|
|
|
|
/* Don't isolate the PHY if we're negotiating */
|
|
ctl &= ~BMCR_ISOLATE;
|
|
|
|
return phy_write(phydev, MII_BMCR, ctl);
|
|
}
|
|
EXPORT_SYMBOL(genphy_restart_aneg);
|
|
|
|
/**
|
|
* genphy_config_aneg - restart auto-negotiation or write BMCR
|
|
* @phydev: target phy_device struct
|
|
*
|
|
* 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)
|
|
{
|
|
int err, changed;
|
|
|
|
changed = genphy_config_eee_advert(phydev);
|
|
|
|
if (AUTONEG_ENABLE != phydev->autoneg)
|
|
return genphy_setup_forced(phydev);
|
|
|
|
err = genphy_config_advert(phydev);
|
|
if (err < 0) /* error */
|
|
return err;
|
|
|
|
changed |= err;
|
|
|
|
if (changed == 0) {
|
|
/* 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 = 1; /* do restart aneg */
|
|
}
|
|
|
|
/* Only restart aneg if we are advertising something different
|
|
* than we were before.
|
|
*/
|
|
if (changed > 0)
|
|
return genphy_restart_aneg(phydev);
|
|
|
|
return 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);
|
|
|
|
static int gen10g_config_aneg(struct phy_device *phydev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/* Do a fake read */
|
|
status = phy_read(phydev, MII_BMSR);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
/* Read link and autonegotiation status */
|
|
status = phy_read(phydev, MII_BMSR);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
if ((status & BMSR_LSTATUS) == 0)
|
|
phydev->link = 0;
|
|
else
|
|
phydev->link = 1;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_update_link);
|
|
|
|
/**
|
|
* 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 adv;
|
|
int err;
|
|
int lpa;
|
|
int lpagb = 0;
|
|
int common_adv;
|
|
int common_adv_gb = 0;
|
|
|
|
/* Update the link, but return if there was an error */
|
|
err = genphy_update_link(phydev);
|
|
if (err)
|
|
return err;
|
|
|
|
phydev->lp_advertising = 0;
|
|
|
|
if (AUTONEG_ENABLE == phydev->autoneg) {
|
|
if (phydev->supported & (SUPPORTED_1000baseT_Half
|
|
| SUPPORTED_1000baseT_Full)) {
|
|
lpagb = phy_read(phydev, MII_STAT1000);
|
|
if (lpagb < 0)
|
|
return lpagb;
|
|
|
|
adv = phy_read(phydev, MII_CTRL1000);
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
phydev->lp_advertising =
|
|
mii_stat1000_to_ethtool_lpa_t(lpagb);
|
|
common_adv_gb = lpagb & adv << 2;
|
|
}
|
|
|
|
lpa = phy_read(phydev, MII_LPA);
|
|
if (lpa < 0)
|
|
return lpa;
|
|
|
|
phydev->lp_advertising |= mii_lpa_to_ethtool_lpa_t(lpa);
|
|
|
|
adv = phy_read(phydev, MII_ADVERTISE);
|
|
if (adv < 0)
|
|
return adv;
|
|
|
|
common_adv = lpa & adv;
|
|
|
|
phydev->speed = SPEED_10;
|
|
phydev->duplex = DUPLEX_HALF;
|
|
phydev->pause = 0;
|
|
phydev->asym_pause = 0;
|
|
|
|
if (common_adv_gb & (LPA_1000FULL | LPA_1000HALF)) {
|
|
phydev->speed = SPEED_1000;
|
|
|
|
if (common_adv_gb & LPA_1000FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
} else if (common_adv & (LPA_100FULL | LPA_100HALF)) {
|
|
phydev->speed = SPEED_100;
|
|
|
|
if (common_adv & LPA_100FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
} else
|
|
if (common_adv & LPA_10FULL)
|
|
phydev->duplex = DUPLEX_FULL;
|
|
|
|
if (phydev->duplex == DUPLEX_FULL) {
|
|
phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
|
|
phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
|
|
}
|
|
} else {
|
|
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;
|
|
|
|
phydev->pause = 0;
|
|
phydev->asym_pause = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_read_status);
|
|
|
|
static int gen10g_read_status(struct phy_device *phydev)
|
|
{
|
|
int devad, reg;
|
|
u32 mmd_mask = phydev->c45_ids.devices_in_package;
|
|
|
|
phydev->link = 1;
|
|
|
|
/* For now just lie and say it's 10G all the time */
|
|
phydev->speed = SPEED_10000;
|
|
phydev->duplex = DUPLEX_FULL;
|
|
|
|
for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) {
|
|
if (!(mmd_mask & 1))
|
|
continue;
|
|
|
|
/* Read twice because link state is latched and a
|
|
* read moves the current state into the register
|
|
*/
|
|
phy_read_mmd(phydev, devad, MDIO_STAT1);
|
|
reg = phy_read_mmd(phydev, devad, MDIO_STAT1);
|
|
if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
|
|
phydev->link = 0;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
int ret;
|
|
|
|
ret = phy_write(phydev, MII_BMCR, BMCR_RESET);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return phy_poll_reset(phydev);
|
|
}
|
|
EXPORT_SYMBOL(genphy_soft_reset);
|
|
|
|
int genphy_config_init(struct phy_device *phydev)
|
|
{
|
|
int val;
|
|
u32 features;
|
|
|
|
features = (SUPPORTED_TP | SUPPORTED_MII
|
|
| SUPPORTED_AUI | SUPPORTED_FIBRE |
|
|
SUPPORTED_BNC | SUPPORTED_Pause | SUPPORTED_Asym_Pause);
|
|
|
|
/* Do we support autonegotiation? */
|
|
val = phy_read(phydev, MII_BMSR);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (val & BMSR_ANEGCAPABLE)
|
|
features |= SUPPORTED_Autoneg;
|
|
|
|
if (val & BMSR_100FULL)
|
|
features |= SUPPORTED_100baseT_Full;
|
|
if (val & BMSR_100HALF)
|
|
features |= SUPPORTED_100baseT_Half;
|
|
if (val & BMSR_10FULL)
|
|
features |= SUPPORTED_10baseT_Full;
|
|
if (val & BMSR_10HALF)
|
|
features |= SUPPORTED_10baseT_Half;
|
|
|
|
if (val & BMSR_ESTATEN) {
|
|
val = phy_read(phydev, MII_ESTATUS);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
if (val & ESTATUS_1000_TFULL)
|
|
features |= SUPPORTED_1000baseT_Full;
|
|
if (val & ESTATUS_1000_THALF)
|
|
features |= SUPPORTED_1000baseT_Half;
|
|
}
|
|
|
|
phydev->supported &= features;
|
|
phydev->advertising &= features;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int gen10g_soft_reset(struct phy_device *phydev)
|
|
{
|
|
/* Do nothing for now */
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_config_init);
|
|
|
|
static int gen10g_config_init(struct phy_device *phydev)
|
|
{
|
|
/* Temporarily just say we support everything */
|
|
phydev->supported = SUPPORTED_10000baseT_Full;
|
|
phydev->advertising = SUPPORTED_10000baseT_Full;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int genphy_suspend(struct phy_device *phydev)
|
|
{
|
|
int value;
|
|
|
|
mutex_lock(&phydev->lock);
|
|
|
|
value = phy_read(phydev, MII_BMCR);
|
|
phy_write(phydev, MII_BMCR, value | BMCR_PDOWN);
|
|
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_suspend);
|
|
|
|
static int gen10g_suspend(struct phy_device *phydev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int genphy_resume(struct phy_device *phydev)
|
|
{
|
|
int value;
|
|
|
|
mutex_lock(&phydev->lock);
|
|
|
|
value = phy_read(phydev, MII_BMCR);
|
|
phy_write(phydev, MII_BMCR, value & ~BMCR_PDOWN);
|
|
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(genphy_resume);
|
|
|
|
static int gen10g_resume(struct phy_device *phydev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int __set_phy_supported(struct phy_device *phydev, u32 max_speed)
|
|
{
|
|
/* The default values for phydev->supported are provided by the PHY
|
|
* driver "features" member, we want to reset to sane defaults first
|
|
* before supporting higher speeds.
|
|
*/
|
|
phydev->supported &= PHY_DEFAULT_FEATURES;
|
|
|
|
switch (max_speed) {
|
|
default:
|
|
return -ENOTSUPP;
|
|
case SPEED_1000:
|
|
phydev->supported |= PHY_1000BT_FEATURES;
|
|
/* fall through */
|
|
case SPEED_100:
|
|
phydev->supported |= PHY_100BT_FEATURES;
|
|
/* fall through */
|
|
case SPEED_10:
|
|
phydev->supported |= PHY_10BT_FEATURES;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
|
|
{
|
|
int err;
|
|
|
|
err = __set_phy_supported(phydev, max_speed);
|
|
if (err)
|
|
return err;
|
|
|
|
phydev->advertising = phydev->supported;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(phy_set_max_speed);
|
|
|
|
static void of_set_phy_supported(struct phy_device *phydev)
|
|
{
|
|
struct device_node *node = phydev->mdio.dev.of_node;
|
|
u32 max_speed;
|
|
|
|
if (!IS_ENABLED(CONFIG_OF_MDIO))
|
|
return;
|
|
|
|
if (!node)
|
|
return;
|
|
|
|
if (!of_property_read_u32(node, "max-speed", &max_speed))
|
|
__set_phy_supported(phydev, max_speed);
|
|
}
|
|
|
|
static void of_set_phy_eee_broken(struct phy_device *phydev)
|
|
{
|
|
struct device_node *node = phydev->mdio.dev.of_node;
|
|
u32 broken = 0;
|
|
|
|
if (!IS_ENABLED(CONFIG_OF_MDIO))
|
|
return;
|
|
|
|
if (!node)
|
|
return;
|
|
|
|
if (of_property_read_bool(node, "eee-broken-100tx"))
|
|
broken |= MDIO_EEE_100TX;
|
|
if (of_property_read_bool(node, "eee-broken-1000t"))
|
|
broken |= MDIO_EEE_1000T;
|
|
if (of_property_read_bool(node, "eee-broken-10gt"))
|
|
broken |= MDIO_EEE_10GT;
|
|
if (of_property_read_bool(node, "eee-broken-1000kx"))
|
|
broken |= MDIO_EEE_1000KX;
|
|
if (of_property_read_bool(node, "eee-broken-10gkx4"))
|
|
broken |= MDIO_EEE_10GKX4;
|
|
if (of_property_read_bool(node, "eee-broken-10gkr"))
|
|
broken |= MDIO_EEE_10GKR;
|
|
|
|
phydev->eee_broken_modes = broken;
|
|
}
|
|
|
|
/**
|
|
* 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 (!(phydrv->flags & PHY_HAS_INTERRUPT) &&
|
|
phy_interrupt_is_valid(phydev))
|
|
phydev->irq = PHY_POLL;
|
|
|
|
if (phydrv->flags & PHY_IS_INTERNAL)
|
|
phydev->is_internal = true;
|
|
|
|
mutex_lock(&phydev->lock);
|
|
|
|
/* Start out supporting everything. Eventually,
|
|
* a controller will attach, and may modify one
|
|
* or both of these values
|
|
*/
|
|
phydev->supported = phydrv->features;
|
|
of_set_phy_supported(phydev);
|
|
phydev->advertising = phydev->supported;
|
|
|
|
/* 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 (phydrv->features & (SUPPORTED_Pause | SUPPORTED_Asym_Pause)) {
|
|
phydev->supported &= ~(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
|
|
phydev->supported |= phydrv->features &
|
|
(SUPPORTED_Pause | SUPPORTED_Asym_Pause);
|
|
} else {
|
|
phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
|
|
}
|
|
|
|
/* Set the state to READY by default */
|
|
phydev->state = PHY_READY;
|
|
|
|
if (phydev->drv->probe)
|
|
err = phydev->drv->probe(phydev);
|
|
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int phy_remove(struct device *dev)
|
|
{
|
|
struct phy_device *phydev = to_phy_device(dev);
|
|
|
|
mutex_lock(&phydev->lock);
|
|
phydev->state = PHY_DOWN;
|
|
mutex_unlock(&phydev->lock);
|
|
|
|
if (phydev->drv->remove)
|
|
phydev->drv->remove(phydev);
|
|
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;
|
|
|
|
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_soft_reset,
|
|
.config_init = genphy_config_init,
|
|
.features = PHY_GBIT_FEATURES | SUPPORTED_MII |
|
|
SUPPORTED_AUI | SUPPORTED_FIBRE |
|
|
SUPPORTED_BNC,
|
|
.config_aneg = genphy_config_aneg,
|
|
.aneg_done = genphy_aneg_done,
|
|
.read_status = genphy_read_status,
|
|
.suspend = genphy_suspend,
|
|
.resume = genphy_resume,
|
|
}, {
|
|
.phy_id = 0xffffffff,
|
|
.phy_id_mask = 0xffffffff,
|
|
.name = "Generic 10G PHY",
|
|
.soft_reset = gen10g_soft_reset,
|
|
.config_init = gen10g_config_init,
|
|
.features = 0,
|
|
.config_aneg = gen10g_config_aneg,
|
|
.read_status = gen10g_read_status,
|
|
.suspend = gen10g_suspend,
|
|
.resume = gen10g_resume,
|
|
} };
|
|
|
|
static int __init phy_init(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = mdio_bus_init();
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = phy_drivers_register(genphy_driver,
|
|
ARRAY_SIZE(genphy_driver), THIS_MODULE);
|
|
if (rc)
|
|
mdio_bus_exit();
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void __exit phy_exit(void)
|
|
{
|
|
phy_drivers_unregister(genphy_driver,
|
|
ARRAY_SIZE(genphy_driver));
|
|
mdio_bus_exit();
|
|
}
|
|
|
|
subsys_initcall(phy_init);
|
|
module_exit(phy_exit);
|