![Zach Brown](/assets/img/avatar_default.png)
Create an option CONFIG_LED_TRIGGER_PHY (default n), which will create a set of led triggers for each instantiated PHY device. There is one LED trigger per link-speed, per-phy. The triggers are registered during phy_attach and unregistered during phy_detach. This allows for a user to configure their system to allow a set of LEDs not controlled by the phy to represent link state changes on the phy. LEDS controlled by the phy are unaffected. For example, we have a board where some of the leds in the RJ45 socket are controlled by the phy, but others are not. Using the triggers provided by this patch the leds not controlled by the phy can be configured to show the current speed of the ethernet connection. The leds controlled by the phy are unaffected. Signed-off-by: Josh Cartwright <josh.cartwright@ni.com> Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com> Signed-off-by: Zach Brown <zach.brown@ni.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1742 lines
42 KiB
C
1742 lines
42 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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/* 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) {
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/* If mostly Fs, there is no device there,
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* then let's continue to probe more, as some
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* 10G PHYs have zero Devices In package,
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* e.g. Cortina CS4315/CS4340 PHY.
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*/
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phy_reg = get_phy_c45_devs_in_pkg(bus, addr, 0, devs);
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if (phy_reg < 0)
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return -EIO;
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/* no device there, let's get out of here */
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if ((*devs & 0x1fffffff) == 0x1fffffff) {
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*phy_id = 0xffffffff;
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return 0;
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} else {
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break;
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}
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}
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}
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/* Now probe Device Identifiers for each device present. */
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for (i = 1; i < num_ids; i++) {
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if (!(c45_ids->devices_in_package & (1 << i)))
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continue;
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reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID1;
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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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c45_ids->device_ids[i] = (phy_reg & 0xffff) << 16;
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reg_addr = MII_ADDR_C45 | i << 16 | MII_PHYSID2;
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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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c45_ids->device_ids[i] |= (phy_reg & 0xffff);
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}
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*phy_id = 0;
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return 0;
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}
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/**
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* get_phy_id - reads the specified addr for its ID.
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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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* @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);
|
|
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 mii_bus *bus = phydev->mdio.bus;
|
|
struct device *d = &phydev->mdio.dev;
|
|
int err;
|
|
|
|
if (!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)
|
|
phy_detach(phydev);
|
|
else
|
|
phy_resume(phydev);
|
|
|
|
phy_led_triggers_register(phydev);
|
|
|
|
return err;
|
|
|
|
error:
|
|
put_device(d);
|
|
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);
|
|
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 mii_bus *bus;
|
|
int i;
|
|
|
|
phydev->attached_dev->phydev = NULL;
|
|
phydev->attached_dev = NULL;
|
|
phy_suspend(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;
|
|
}
|
|
}
|
|
|
|
phy_led_triggers_unregister(phydev);
|
|
|
|
/*
|
|
* 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);
|
|
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_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 result;
|
|
|
|
if (AUTONEG_ENABLE != phydev->autoneg)
|
|
return genphy_setup_forced(phydev);
|
|
|
|
result = genphy_config_advert(phydev);
|
|
if (result < 0) /* error */
|
|
return result;
|
|
if (result == 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))
|
|
result = 1; /* do restart aneg */
|
|
}
|
|
|
|
/* Only restart aneg if we are advertising something different
|
|
* than we were before.
|
|
*/
|
|
if (result > 0)
|
|
result = genphy_restart_aneg(phydev);
|
|
|
|
return result;
|
|
}
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* 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;
|
|
|
|
/* 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);
|