/* Framework for configuring and reading PHY devices
* Based on code in sungem_phy.c and gianfar_phy.c
*
* Author: Andy Fleming
*
* Copyright (c) 2004 Freescale Semiconductor, Inc.
* Copyright (c) 2006, 2007 Maciej W. Rozycki
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/phy_led_triggers.h>
#include <linux/workqueue.h>
#include <linux/mdio.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <linux/atomic.h>
#include <asm/irq.h>
#define PHY_STATE_STR(_state) \
case PHY_##_state: \
return __stringify(_state); \
static const char *phy_state_to_str(enum phy_state st)
{
switch (st) {
PHY_STATE_STR(DOWN)
PHY_STATE_STR(STARTING)
PHY_STATE_STR(READY)
PHY_STATE_STR(PENDING)
PHY_STATE_STR(UP)
PHY_STATE_STR(AN)
PHY_STATE_STR(RUNNING)
PHY_STATE_STR(NOLINK)
PHY_STATE_STR(FORCING)
PHY_STATE_STR(CHANGELINK)
PHY_STATE_STR(HALTED)
PHY_STATE_STR(RESUMING)
}
return NULL;
}
/**
* phy_print_status - Convenience function to print out the current phy status
* @phydev: the phy_device struct
*/
void phy_print_status(struct phy_device *phydev)
{
if (phydev->link) {
netdev_info(phydev->attached_dev,
"Link is Up - %s/%s - flow control %s\n",
phy_speed_to_str(phydev->speed),
phy_duplex_to_str(phydev->duplex),
phydev->pause ? "rx/tx" : "off");
} else {
netdev_info(phydev->attached_dev, "Link is Down\n");
}
}
EXPORT_SYMBOL(phy_print_status);
/**
* phy_clear_interrupt - Ack the phy device's interrupt
* @phydev: the phy_device struct
*
* If the @phydev driver has an ack_interrupt function, call it to
* ack and clear the phy device's interrupt.
*
* Returns 0 on success or < 0 on error.
*/
static int phy_clear_interrupt(struct phy_device *phydev)
{
if (phydev->drv->ack_interrupt)
return phydev->drv->ack_interrupt(phydev);
return 0;
}
/**
* phy_config_interrupt - configure the PHY device for the requested interrupts
* @phydev: the phy_device struct
* @interrupts: interrupt flags to configure for this @phydev
*
* Returns 0 on success or < 0 on error.
*/
static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
{
phydev->interrupts = interrupts;
if (phydev->drv->config_intr)
return phydev->drv->config_intr(phydev);
return 0;
}
/**
* phy_restart_aneg - restart auto-negotiation
* @phydev: target phy_device struct
*
* Restart the autonegotiation on @phydev. Returns >= 0 on success or
* negative errno on error.
*/
int phy_restart_aneg(struct phy_device *phydev)
{
int ret;