This patch adds a PHY Abstraction Layer to the Linux Kernel, enabling
ethernet drivers to remain as ignorant as is reasonable of the connected PHY's design and operation details. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
This commit is contained in:
Andy Fleming
committed by
Jeff Garzik
Jeff Garzik
parent
b0825488a6
commit
00db8189d9
862
drivers/net/phy/phy.c
Normal file
862
drivers/net/phy/phy.c
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@@ -0,0 +1,862 @@
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/*
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* drivers/net/phy/phy.c
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*
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* Framework for configuring and reading PHY devices
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* Based on code in sungem_phy.c and gianfar_phy.c
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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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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/sched.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/spinlock.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/version.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 <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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static void phy_change(void *data);
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static void phy_timer(unsigned long data);
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/* Convenience function to print out the current phy status
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*/
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void phy_print_status(struct phy_device *phydev)
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{
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pr_info("%s: Link is %s", phydev->dev.bus_id,
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phydev->link ? "Up" : "Down");
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if (phydev->link)
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printk(" - %d/%s", phydev->speed,
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DUPLEX_FULL == phydev->duplex ?
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"Full" : "Half");
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printk("\n");
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}
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EXPORT_SYMBOL(phy_print_status);
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/* Convenience functions for reading/writing a given PHY
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* register. They MUST NOT be called from interrupt context,
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* because the bus read/write functions may wait for an interrupt
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* to conclude the operation. */
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int phy_read(struct phy_device *phydev, u16 regnum)
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{
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int retval;
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struct mii_bus *bus = phydev->bus;
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spin_lock_bh(&bus->mdio_lock);
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retval = bus->read(bus, phydev->addr, regnum);
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spin_unlock_bh(&bus->mdio_lock);
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return retval;
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}
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EXPORT_SYMBOL(phy_read);
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int phy_write(struct phy_device *phydev, u16 regnum, u16 val)
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{
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int err;
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struct mii_bus *bus = phydev->bus;
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spin_lock_bh(&bus->mdio_lock);
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err = bus->write(bus, phydev->addr, regnum, val);
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spin_unlock_bh(&bus->mdio_lock);
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return err;
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}
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EXPORT_SYMBOL(phy_write);
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int phy_clear_interrupt(struct phy_device *phydev)
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{
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int err = 0;
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if (phydev->drv->ack_interrupt)
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err = phydev->drv->ack_interrupt(phydev);
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return err;
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}
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int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
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{
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int err = 0;
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phydev->interrupts = interrupts;
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if (phydev->drv->config_intr)
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err = phydev->drv->config_intr(phydev);
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return err;
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}
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/* phy_aneg_done
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*
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* description: Reads the status register and returns 0 either if
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* auto-negotiation is incomplete, or if there was an error.
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* Returns BMSR_ANEGCOMPLETE if auto-negotiation is done.
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*/
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static inline int phy_aneg_done(struct phy_device *phydev)
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{
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int retval;
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retval = phy_read(phydev, MII_BMSR);
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return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE);
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}
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/* phy_start_aneg
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*
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* description: Calls the PHY driver's config_aneg, and then
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* sets the PHY state to PHY_AN if auto-negotiation is enabled,
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* and to PHY_FORCING if auto-negotiation is disabled. Unless
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* the PHY is currently HALTED.
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*/
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int phy_start_aneg(struct phy_device *phydev)
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{
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int err;
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spin_lock(&phydev->lock);
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if (AUTONEG_DISABLE == phydev->autoneg)
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phy_sanitize_settings(phydev);
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err = phydev->drv->config_aneg(phydev);
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if (err < 0)
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goto out_unlock;
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if (phydev->state != PHY_HALTED) {
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if (AUTONEG_ENABLE == phydev->autoneg) {
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phydev->state = PHY_AN;
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phydev->link_timeout = PHY_AN_TIMEOUT;
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} else {
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phydev->state = PHY_FORCING;
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phydev->link_timeout = PHY_FORCE_TIMEOUT;
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}
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}
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out_unlock:
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spin_unlock(&phydev->lock);
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return err;
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}
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EXPORT_SYMBOL(phy_start_aneg);
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/* A structure for mapping a particular speed and duplex
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* combination to a particular SUPPORTED and ADVERTISED value */
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struct phy_setting {
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int speed;
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int duplex;
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u32 setting;
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};
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/* A mapping of all SUPPORTED settings to speed/duplex */
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static struct phy_setting settings[] = {
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{
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.speed = 10000,
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.duplex = DUPLEX_FULL,
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.setting = SUPPORTED_10000baseT_Full,
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},
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{
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.speed = SPEED_1000,
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.duplex = DUPLEX_FULL,
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.setting = SUPPORTED_1000baseT_Full,
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},
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{
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.speed = SPEED_1000,
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.duplex = DUPLEX_HALF,
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.setting = SUPPORTED_1000baseT_Half,
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},
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{
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.speed = SPEED_100,
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.duplex = DUPLEX_FULL,
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.setting = SUPPORTED_100baseT_Full,
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},
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{
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.speed = SPEED_100,
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.duplex = DUPLEX_HALF,
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.setting = SUPPORTED_100baseT_Half,
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},
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{
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.speed = SPEED_10,
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.duplex = DUPLEX_FULL,
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.setting = SUPPORTED_10baseT_Full,
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},
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{
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.speed = SPEED_10,
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.duplex = DUPLEX_HALF,
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.setting = SUPPORTED_10baseT_Half,
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},
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};
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#define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting))
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/* phy_find_setting
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*
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* description: Searches the settings array for the setting which
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* matches the desired speed and duplex, and returns the index
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* of that setting. Returns the index of the last setting if
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* none of the others match.
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*/
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static inline int phy_find_setting(int speed, int duplex)
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{
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int idx = 0;
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while (idx < ARRAY_SIZE(settings) &&
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(settings[idx].speed != speed ||
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settings[idx].duplex != duplex))
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idx++;
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return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
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}
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/* phy_find_valid
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* idx: The first index in settings[] to search
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* features: A mask of the valid settings
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*
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* description: Returns the index of the first valid setting less
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* than or equal to the one pointed to by idx, as determined by
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* the mask in features. Returns the index of the last setting
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* if nothing else matches.
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*/
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static inline int phy_find_valid(int idx, u32 features)
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{
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while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
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idx++;
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return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
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}
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/* phy_sanitize_settings
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*
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* description: Make sure the PHY is set to supported speeds and
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* duplexes. Drop down by one in this order: 1000/FULL,
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* 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF
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*/
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void phy_sanitize_settings(struct phy_device *phydev)
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{
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u32 features = phydev->supported;
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int idx;
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/* Sanitize settings based on PHY capabilities */
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if ((features & SUPPORTED_Autoneg) == 0)
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phydev->autoneg = 0;
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idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
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features);
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phydev->speed = settings[idx].speed;
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phydev->duplex = settings[idx].duplex;
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}
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EXPORT_SYMBOL(phy_sanitize_settings);
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/* phy_force_reduction
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*
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* description: Reduces the speed/duplex settings by
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* one notch. The order is so:
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* 1000/FULL, 1000/HALF, 100/FULL, 100/HALF,
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* 10/FULL, 10/HALF. The function bottoms out at 10/HALF.
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*/
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static void phy_force_reduction(struct phy_device *phydev)
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{
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int idx;
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idx = phy_find_setting(phydev->speed, phydev->duplex);
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idx++;
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idx = phy_find_valid(idx, phydev->supported);
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phydev->speed = settings[idx].speed;
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phydev->duplex = settings[idx].duplex;
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pr_info("Trying %d/%s\n", phydev->speed,
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DUPLEX_FULL == phydev->duplex ?
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"FULL" : "HALF");
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}
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/* phy_ethtool_sset:
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* A generic ethtool sset function. Handles all the details
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*
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* A few notes about parameter checking:
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* - We don't set port or transceiver, so we don't care what they
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* were set to.
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* - phy_start_aneg() will make sure forced settings are sane, and
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* choose the next best ones from the ones selected, so we don't
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* care if ethtool tries to give us bad values
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*/
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int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
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{
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if (cmd->phy_address != phydev->addr)
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return -EINVAL;
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/* We make sure that we don't pass unsupported
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* values in to the PHY */
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cmd->advertising &= phydev->supported;
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/* Verify the settings we care about. */
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if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
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return -EINVAL;
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if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
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return -EINVAL;
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if (cmd->autoneg == AUTONEG_DISABLE
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&& ((cmd->speed != SPEED_1000
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&& cmd->speed != SPEED_100
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&& cmd->speed != SPEED_10)
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|| (cmd->duplex != DUPLEX_HALF
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&& cmd->duplex != DUPLEX_FULL)))
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return -EINVAL;
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phydev->autoneg = cmd->autoneg;
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phydev->speed = cmd->speed;
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phydev->advertising = cmd->advertising;
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if (AUTONEG_ENABLE == cmd->autoneg)
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phydev->advertising |= ADVERTISED_Autoneg;
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else
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phydev->advertising &= ~ADVERTISED_Autoneg;
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phydev->duplex = cmd->duplex;
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/* Restart the PHY */
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phy_start_aneg(phydev);
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return 0;
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}
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int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
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{
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cmd->supported = phydev->supported;
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cmd->advertising = phydev->advertising;
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cmd->speed = phydev->speed;
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cmd->duplex = phydev->duplex;
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cmd->port = PORT_MII;
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cmd->phy_address = phydev->addr;
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cmd->transceiver = XCVR_EXTERNAL;
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cmd->autoneg = phydev->autoneg;
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return 0;
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}
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/* Note that this function is currently incompatible with the
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* PHYCONTROL layer. It changes registers without regard to
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* current state. Use at own risk
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*/
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int phy_mii_ioctl(struct phy_device *phydev,
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struct mii_ioctl_data *mii_data, int cmd)
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{
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u16 val = mii_data->val_in;
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switch (cmd) {
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case SIOCGMIIPHY:
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mii_data->phy_id = phydev->addr;
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break;
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case SIOCGMIIREG:
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mii_data->val_out = phy_read(phydev, mii_data->reg_num);
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break;
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case SIOCSMIIREG:
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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if (mii_data->phy_id == phydev->addr) {
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switch(mii_data->reg_num) {
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case MII_BMCR:
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if (val & (BMCR_RESET|BMCR_ANENABLE))
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phydev->autoneg = AUTONEG_DISABLE;
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else
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phydev->autoneg = AUTONEG_ENABLE;
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if ((!phydev->autoneg) && (val & BMCR_FULLDPLX))
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phydev->duplex = DUPLEX_FULL;
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else
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phydev->duplex = DUPLEX_HALF;
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break;
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case MII_ADVERTISE:
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phydev->advertising = val;
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break;
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default:
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/* do nothing */
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break;
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}
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}
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phy_write(phydev, mii_data->reg_num, val);
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if (mii_data->reg_num == MII_BMCR
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&& val & BMCR_RESET
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&& phydev->drv->config_init)
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phydev->drv->config_init(phydev);
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break;
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}
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return 0;
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}
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/* phy_start_machine:
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*
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* description: The PHY infrastructure can run a state machine
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* which tracks whether the PHY is starting up, negotiating,
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* etc. This function starts the timer which tracks the state
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* of the PHY. If you want to be notified when the state
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* changes, pass in the callback, otherwise, pass NULL. If you
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* want to maintain your own state machine, do not call this
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* function. */
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void phy_start_machine(struct phy_device *phydev,
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void (*handler)(struct net_device *))
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{
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phydev->adjust_state = handler;
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init_timer(&phydev->phy_timer);
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phydev->phy_timer.function = &phy_timer;
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phydev->phy_timer.data = (unsigned long) phydev;
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mod_timer(&phydev->phy_timer, jiffies + HZ);
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}
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/* phy_stop_machine
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*
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* description: Stops the state machine timer, sets the state to
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* UP (unless it wasn't up yet), and then frees the interrupt,
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* if it is in use. This function must be called BEFORE
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* phy_detach.
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*/
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void phy_stop_machine(struct phy_device *phydev)
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{
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del_timer_sync(&phydev->phy_timer);
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spin_lock(&phydev->lock);
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if (phydev->state > PHY_UP)
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phydev->state = PHY_UP;
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spin_unlock(&phydev->lock);
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if (phydev->irq != PHY_POLL)
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phy_stop_interrupts(phydev);
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phydev->adjust_state = NULL;
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}
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#ifdef CONFIG_PHYCONTROL
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/* phy_error:
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*
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* Moves the PHY to the HALTED state in response to a read
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* or write error, and tells the controller the link is down.
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* Must not be called from interrupt context, or while the
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* phydev->lock is held.
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*/
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void phy_error(struct phy_device *phydev)
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{
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spin_lock(&phydev->lock);
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phydev->state = PHY_HALTED;
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spin_unlock(&phydev->lock);
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}
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/* phy_interrupt
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*
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* description: When a PHY interrupt occurs, the handler disables
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* interrupts, and schedules a work task to clear the interrupt.
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*/
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static irqreturn_t phy_interrupt(int irq, void *phy_dat, struct pt_regs *regs)
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{
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struct phy_device *phydev = phy_dat;
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/* The MDIO bus is not allowed to be written in interrupt
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* context, so we need to disable the irq here. A work
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* queue will write the PHY to disable and clear the
|
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* interrupt, and then reenable the irq line. */
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disable_irq_nosync(irq);
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||||
|
||||
schedule_work(&phydev->phy_queue);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* Enable the interrupts from the PHY side */
|
||||
int phy_enable_interrupts(struct phy_device *phydev)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = phy_clear_interrupt(phydev);
|
||||
|
||||
if (err < 0)
|
||||
return err;
|
||||
|
||||
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(phy_enable_interrupts);
|
||||
|
||||
/* Disable the PHY interrupts from the PHY side */
|
||||
int phy_disable_interrupts(struct phy_device *phydev)
|
||||
{
|
||||
int err;
|
||||
|
||||
/* Disable PHY interrupts */
|
||||
err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
|
||||
|
||||
if (err)
|
||||
goto phy_err;
|
||||
|
||||
/* Clear the interrupt */
|
||||
err = phy_clear_interrupt(phydev);
|
||||
|
||||
if (err)
|
||||
goto phy_err;
|
||||
|
||||
return 0;
|
||||
|
||||
phy_err:
|
||||
phy_error(phydev);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(phy_disable_interrupts);
|
||||
|
||||
/* phy_start_interrupts
|
||||
*
|
||||
* description: Request the interrupt for the given PHY. If
|
||||
* this fails, then we set irq to PHY_POLL.
|
||||
* Otherwise, we enable the interrupts in the PHY.
|
||||
* Returns 0 on success.
|
||||
* This should only be called with a valid IRQ number.
|
||||
*/
|
||||
int phy_start_interrupts(struct phy_device *phydev)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
INIT_WORK(&phydev->phy_queue, phy_change, phydev);
|
||||
|
||||
if (request_irq(phydev->irq, phy_interrupt,
|
||||
SA_SHIRQ,
|
||||
"phy_interrupt",
|
||||
phydev) < 0) {
|
||||
printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n",
|
||||
phydev->bus->name,
|
||||
phydev->irq);
|
||||
phydev->irq = PHY_POLL;
|
||||
return 0;
|
||||
}
|
||||
|
||||
err = phy_enable_interrupts(phydev);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(phy_start_interrupts);
|
||||
|
||||
int phy_stop_interrupts(struct phy_device *phydev)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = phy_disable_interrupts(phydev);
|
||||
|
||||
if (err)
|
||||
phy_error(phydev);
|
||||
|
||||
free_irq(phydev->irq, phydev);
|
||||
|
||||
return err;
|
||||
}
|
||||
EXPORT_SYMBOL(phy_stop_interrupts);
|
||||
|
||||
|
||||
/* Scheduled by the phy_interrupt/timer to handle PHY changes */
|
||||
static void phy_change(void *data)
|
||||
{
|
||||
int err;
|
||||
struct phy_device *phydev = data;
|
||||
|
||||
err = phy_disable_interrupts(phydev);
|
||||
|
||||
if (err)
|
||||
goto phy_err;
|
||||
|
||||
spin_lock(&phydev->lock);
|
||||
if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
|
||||
phydev->state = PHY_CHANGELINK;
|
||||
spin_unlock(&phydev->lock);
|
||||
|
||||
enable_irq(phydev->irq);
|
||||
|
||||
/* Reenable interrupts */
|
||||
err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
|
||||
|
||||
if (err)
|
||||
goto irq_enable_err;
|
||||
|
||||
return;
|
||||
|
||||
irq_enable_err:
|
||||
disable_irq(phydev->irq);
|
||||
phy_err:
|
||||
phy_error(phydev);
|
||||
}
|
||||
|
||||
/* Bring down the PHY link, and stop checking the status. */
|
||||
void phy_stop(struct phy_device *phydev)
|
||||
{
|
||||
spin_lock(&phydev->lock);
|
||||
|
||||
if (PHY_HALTED == phydev->state)
|
||||
goto out_unlock;
|
||||
|
||||
if (phydev->irq != PHY_POLL) {
|
||||
/* Clear any pending interrupts */
|
||||
phy_clear_interrupt(phydev);
|
||||
|
||||
/* Disable PHY Interrupts */
|
||||
phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);
|
||||
}
|
||||
|
||||
phydev->state = PHY_HALTED;
|
||||
|
||||
out_unlock:
|
||||
spin_unlock(&phydev->lock);
|
||||
}
|
||||
|
||||
|
||||
/* phy_start
|
||||
*
|
||||
* description: Indicates the attached device's readiness to
|
||||
* handle PHY-related work. Used during startup to start the
|
||||
* PHY, and after a call to phy_stop() to resume operation.
|
||||
* Also used to indicate the MDIO bus has cleared an error
|
||||
* condition.
|
||||
*/
|
||||
void phy_start(struct phy_device *phydev)
|
||||
{
|
||||
spin_lock(&phydev->lock);
|
||||
|
||||
switch (phydev->state) {
|
||||
case PHY_STARTING:
|
||||
phydev->state = PHY_PENDING;
|
||||
break;
|
||||
case PHY_READY:
|
||||
phydev->state = PHY_UP;
|
||||
break;
|
||||
case PHY_HALTED:
|
||||
phydev->state = PHY_RESUMING;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
spin_unlock(&phydev->lock);
|
||||
}
|
||||
EXPORT_SYMBOL(phy_stop);
|
||||
EXPORT_SYMBOL(phy_start);
|
||||
|
||||
/* PHY timer which handles the state machine */
|
||||
static void phy_timer(unsigned long data)
|
||||
{
|
||||
struct phy_device *phydev = (struct phy_device *)data;
|
||||
int needs_aneg = 0;
|
||||
int err = 0;
|
||||
|
||||
spin_lock(&phydev->lock);
|
||||
|
||||
if (phydev->adjust_state)
|
||||
phydev->adjust_state(phydev->attached_dev);
|
||||
|
||||
switch(phydev->state) {
|
||||
case PHY_DOWN:
|
||||
case PHY_STARTING:
|
||||
case PHY_READY:
|
||||
case PHY_PENDING:
|
||||
break;
|
||||
case PHY_UP:
|
||||
needs_aneg = 1;
|
||||
|
||||
phydev->link_timeout = PHY_AN_TIMEOUT;
|
||||
|
||||
break;
|
||||
case PHY_AN:
|
||||
/* Check if negotiation is done. Break
|
||||
* if there's an error */
|
||||
err = phy_aneg_done(phydev);
|
||||
if (err < 0)
|
||||
break;
|
||||
|
||||
/* If auto-negotiation is done, we change to
|
||||
* either RUNNING, or NOLINK */
|
||||
if (err > 0) {
|
||||
err = phy_read_status(phydev);
|
||||
|
||||
if (err)
|
||||
break;
|
||||
|
||||
if (phydev->link) {
|
||||
phydev->state = PHY_RUNNING;
|
||||
netif_carrier_on(phydev->attached_dev);
|
||||
} else {
|
||||
phydev->state = PHY_NOLINK;
|
||||
netif_carrier_off(phydev->attached_dev);
|
||||
}
|
||||
|
||||
phydev->adjust_link(phydev->attached_dev);
|
||||
|
||||
} else if (0 == phydev->link_timeout--) {
|
||||
/* The counter expired, so either we
|
||||
* switch to forced mode, or the
|
||||
* magic_aneg bit exists, and we try aneg
|
||||
* again */
|
||||
if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) {
|
||||
int idx;
|
||||
|
||||
/* We'll start from the
|
||||
* fastest speed, and work
|
||||
* our way down */
|
||||
idx = phy_find_valid(0,
|
||||
phydev->supported);
|
||||
|
||||
phydev->speed = settings[idx].speed;
|
||||
phydev->duplex = settings[idx].duplex;
|
||||
|
||||
phydev->autoneg = AUTONEG_DISABLE;
|
||||
phydev->state = PHY_FORCING;
|
||||
phydev->link_timeout =
|
||||
PHY_FORCE_TIMEOUT;
|
||||
|
||||
pr_info("Trying %d/%s\n",
|
||||
phydev->speed,
|
||||
DUPLEX_FULL ==
|
||||
phydev->duplex ?
|
||||
"FULL" : "HALF");
|
||||
}
|
||||
|
||||
needs_aneg = 1;
|
||||
}
|
||||
break;
|
||||
case PHY_NOLINK:
|
||||
err = phy_read_status(phydev);
|
||||
|
||||
if (err)
|
||||
break;
|
||||
|
||||
if (phydev->link) {
|
||||
phydev->state = PHY_RUNNING;
|
||||
netif_carrier_on(phydev->attached_dev);
|
||||
phydev->adjust_link(phydev->attached_dev);
|
||||
}
|
||||
break;
|
||||
case PHY_FORCING:
|
||||
err = phy_read_status(phydev);
|
||||
|
||||
if (err)
|
||||
break;
|
||||
|
||||
if (phydev->link) {
|
||||
phydev->state = PHY_RUNNING;
|
||||
netif_carrier_on(phydev->attached_dev);
|
||||
} else {
|
||||
if (0 == phydev->link_timeout--) {
|
||||
phy_force_reduction(phydev);
|
||||
needs_aneg = 1;
|
||||
}
|
||||
}
|
||||
|
||||
phydev->adjust_link(phydev->attached_dev);
|
||||
break;
|
||||
case PHY_RUNNING:
|
||||
/* Only register a CHANGE if we are
|
||||
* polling */
|
||||
if (PHY_POLL == phydev->irq)
|
||||
phydev->state = PHY_CHANGELINK;
|
||||
break;
|
||||
case PHY_CHANGELINK:
|
||||
err = phy_read_status(phydev);
|
||||
|
||||
if (err)
|
||||
break;
|
||||
|
||||
if (phydev->link) {
|
||||
phydev->state = PHY_RUNNING;
|
||||
netif_carrier_on(phydev->attached_dev);
|
||||
} else {
|
||||
phydev->state = PHY_NOLINK;
|
||||
netif_carrier_off(phydev->attached_dev);
|
||||
}
|
||||
|
||||
phydev->adjust_link(phydev->attached_dev);
|
||||
|
||||
if (PHY_POLL != phydev->irq)
|
||||
err = phy_config_interrupt(phydev,
|
||||
PHY_INTERRUPT_ENABLED);
|
||||
break;
|
||||
case PHY_HALTED:
|
||||
if (phydev->link) {
|
||||
phydev->link = 0;
|
||||
netif_carrier_off(phydev->attached_dev);
|
||||
phydev->adjust_link(phydev->attached_dev);
|
||||
}
|
||||
break;
|
||||
case PHY_RESUMING:
|
||||
|
||||
err = phy_clear_interrupt(phydev);
|
||||
|
||||
if (err)
|
||||
break;
|
||||
|
||||
err = phy_config_interrupt(phydev,
|
||||
PHY_INTERRUPT_ENABLED);
|
||||
|
||||
if (err)
|
||||
break;
|
||||
|
||||
if (AUTONEG_ENABLE == phydev->autoneg) {
|
||||
err = phy_aneg_done(phydev);
|
||||
if (err < 0)
|
||||
break;
|
||||
|
||||
/* err > 0 if AN is done.
|
||||
* Otherwise, it's 0, and we're
|
||||
* still waiting for AN */
|
||||
if (err > 0) {
|
||||
phydev->state = PHY_RUNNING;
|
||||
} else {
|
||||
phydev->state = PHY_AN;
|
||||
phydev->link_timeout = PHY_AN_TIMEOUT;
|
||||
}
|
||||
} else
|
||||
phydev->state = PHY_RUNNING;
|
||||
break;
|
||||
}
|
||||
|
||||
spin_unlock(&phydev->lock);
|
||||
|
||||
if (needs_aneg)
|
||||
err = phy_start_aneg(phydev);
|
||||
|
||||
if (err < 0)
|
||||
phy_error(phydev);
|
||||
|
||||
mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ);
|
||||
}
|
||||
|
||||
#endif /* CONFIG_PHYCONTROL */
|
||||
Reference in New Issue
Block a user