phy.c 35.8 KB
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Sergei Shtylyov 已提交
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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
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
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 * Copyright (c) 2006, 2007  Maciej W. Rozycki
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 *
 * 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.
 *
 */
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

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#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>
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#include <linux/timer.h>
#include <linux/workqueue.h>
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#include <linux/mdio.h>
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#include <linux/io.h>
#include <linux/uaccess.h>
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#include <linux/atomic.h>
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#include <asm/irq.h>

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static const char *phy_speed_to_str(int speed)
{
	switch (speed) {
	case SPEED_10:
		return "10Mbps";
	case SPEED_100:
		return "100Mbps";
	case SPEED_1000:
		return "1Gbps";
	case SPEED_2500:
		return "2.5Gbps";
	case SPEED_10000:
		return "10Gbps";
	case SPEED_UNKNOWN:
		return "Unknown";
	default:
		return "Unsupported (update phy.c)";
	}
}

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#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;
}


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/**
 * phy_print_status - Convenience function to print out the current phy status
 * @phydev: the phy_device struct
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 */
void phy_print_status(struct phy_device *phydev)
{
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	if (phydev->link) {
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		netdev_info(phydev->attached_dev,
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			"Link is Up - %s/%s - flow control %s\n",
			phy_speed_to_str(phydev->speed),
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			DUPLEX_FULL == phydev->duplex ? "Full" : "Half",
			phydev->pause ? "rx/tx" : "off");
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	} else	{
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		netdev_info(phydev->attached_dev, "Link is Down\n");
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	}
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}
EXPORT_SYMBOL(phy_print_status);
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/**
 * 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.
 *
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 * Returns 0 on success or < 0 on error.
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 */
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static int phy_clear_interrupt(struct phy_device *phydev)
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{
	if (phydev->drv->ack_interrupt)
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		return phydev->drv->ack_interrupt(phydev);
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	return 0;
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}

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/**
 * phy_config_interrupt - configure the PHY device for the requested interrupts
 * @phydev: the phy_device struct
 * @interrupts: interrupt flags to configure for this @phydev
 *
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 * Returns 0 on success or < 0 on error.
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 */
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static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts)
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{
	phydev->interrupts = interrupts;
	if (phydev->drv->config_intr)
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		return phydev->drv->config_intr(phydev);
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	return 0;
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}


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/**
 * phy_aneg_done - return auto-negotiation status
 * @phydev: target phy_device struct
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 *
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 * Description: Return the auto-negotiation status from this @phydev
 * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation
 * is still pending.
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 */
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int phy_aneg_done(struct phy_device *phydev)
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{
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	if (phydev->drv->aneg_done)
		return phydev->drv->aneg_done(phydev);

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	return genphy_aneg_done(phydev);
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}
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EXPORT_SYMBOL(phy_aneg_done);
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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 {
	int speed;
	int duplex;
	u32 setting;
};

/* A mapping of all SUPPORTED settings to speed/duplex */
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static const struct phy_setting settings[] = {
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	{
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		.speed = SPEED_10000,
		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_10000baseKR_Full,
	},
	{
		.speed = SPEED_10000,
		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_10000baseKX4_Full,
	},
	{
		.speed = SPEED_10000,
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		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_10000baseT_Full,
	},
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	{
		.speed = SPEED_2500,
		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_2500baseX_Full,
	},
	{
		.speed = SPEED_1000,
		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_1000baseKX_Full,
	},
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	{
		.speed = SPEED_1000,
		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_1000baseT_Full,
	},
	{
		.speed = SPEED_1000,
		.duplex = DUPLEX_HALF,
		.setting = SUPPORTED_1000baseT_Half,
	},
	{
		.speed = SPEED_100,
		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_100baseT_Full,
	},
	{
		.speed = SPEED_100,
		.duplex = DUPLEX_HALF,
		.setting = SUPPORTED_100baseT_Half,
	},
	{
		.speed = SPEED_10,
		.duplex = DUPLEX_FULL,
		.setting = SUPPORTED_10baseT_Full,
	},
	{
		.speed = SPEED_10,
		.duplex = DUPLEX_HALF,
		.setting = SUPPORTED_10baseT_Half,
	},
};

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#define MAX_NUM_SETTINGS ARRAY_SIZE(settings)
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/**
 * phy_find_setting - find a PHY settings array entry that matches speed & duplex
 * @speed: speed to match
 * @duplex: duplex to match
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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
 *   of that setting.  Returns the index of the last setting if
 *   none of the others match.
 */
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static inline unsigned int phy_find_setting(int speed, int duplex)
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{
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	unsigned int idx = 0;
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	while (idx < ARRAY_SIZE(settings) &&
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	       (settings[idx].speed != speed || settings[idx].duplex != duplex))
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		idx++;

	return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
}

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/**
 * phy_find_valid - find a PHY setting that matches the requested features mask
 * @idx: The first index in settings[] to search
 * @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
 *   the mask in features.  Returns the index of the last setting
 *   if nothing else matches.
 */
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static inline unsigned int phy_find_valid(unsigned int idx, u32 features)
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{
	while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features))
		idx++;

	return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1;
}

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/**
 * phy_supported_speeds - return all speeds currently supported by a phy device
 * @phy: The phy device to return supported speeds of.
 * @speeds: buffer to store supported speeds in.
 * @size:   size of speeds buffer.
 *
 * Description: Returns the number of supported speeds, and fills the speeds
 * buffer with the supported speeds. If speeds buffer is too small to contain
 * all currently supported speeds, will return as many speeds as can fit.
 */
unsigned int phy_supported_speeds(struct phy_device *phy,
				  unsigned int *speeds,
				  unsigned int size)
{
	unsigned int count = 0;
	unsigned int idx = 0;

	while (idx < MAX_NUM_SETTINGS && count < size) {
		idx = phy_find_valid(idx, phy->supported);

		if (!(settings[idx].setting & phy->supported))
			break;

		/* Assumes settings are grouped by speed */
		if ((count == 0) ||
		    (speeds[count - 1] != settings[idx].speed)) {
			speeds[count] = settings[idx].speed;
			count++;
		}
		idx++;
	}

	return count;
}

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/**
 * phy_check_valid - check if there is a valid PHY setting which matches
 *		     speed, duplex, and feature mask
 * @speed: speed to match
 * @duplex: duplex to match
 * @features: A mask of the valid settings
 *
 * Description: Returns true if there is a valid setting, false otherwise.
 */
static inline bool phy_check_valid(int speed, int duplex, u32 features)
{
	unsigned int idx;

	idx = phy_find_valid(phy_find_setting(speed, duplex), features);

	return settings[idx].speed == speed && settings[idx].duplex == duplex &&
		(settings[idx].setting & features);
}

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/**
 * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex
 * @phydev: the target phy_device struct
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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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static void phy_sanitize_settings(struct phy_device *phydev)
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{
	u32 features = phydev->supported;
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	unsigned int idx;
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	/* Sanitize settings based on PHY capabilities */
	if ((features & SUPPORTED_Autoneg) == 0)
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		phydev->autoneg = AUTONEG_DISABLE;
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	idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex),
			features);

	phydev->speed = settings[idx].speed;
	phydev->duplex = settings[idx].duplex;
}

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/**
 * phy_ethtool_sset - generic ethtool sset function, handles all the details
 * @phydev: target phy_device struct
 * @cmd: ethtool_cmd
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 *
 * A few notes about parameter checking:
 * - We don't set port or transceiver, so we don't care what they
 *   were set to.
 * - phy_start_aneg() will make sure forced settings are sane, and
 *   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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 */
int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd)
{
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	u32 speed = ethtool_cmd_speed(cmd);

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	if (cmd->phy_address != phydev->mdio.addr)
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		return -EINVAL;

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	/* We make sure that we don't pass unsupported values in to the PHY */
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	cmd->advertising &= phydev->supported;

	/* Verify the settings we care about. */
	if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
		return -EINVAL;

	if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
		return -EINVAL;

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	if (cmd->autoneg == AUTONEG_DISABLE &&
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	    ((speed != SPEED_1000 &&
	      speed != SPEED_100 &&
	      speed != SPEED_10) ||
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	     (cmd->duplex != DUPLEX_HALF &&
	      cmd->duplex != DUPLEX_FULL)))
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		return -EINVAL;

	phydev->autoneg = cmd->autoneg;

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	phydev->speed = speed;
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	phydev->advertising = cmd->advertising;

	if (AUTONEG_ENABLE == cmd->autoneg)
		phydev->advertising |= ADVERTISED_Autoneg;
	else
		phydev->advertising &= ~ADVERTISED_Autoneg;

	phydev->duplex = cmd->duplex;

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	phydev->mdix = cmd->eth_tp_mdix_ctrl;

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	/* Restart the PHY */
	phy_start_aneg(phydev);

	return 0;
}
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EXPORT_SYMBOL(phy_ethtool_sset);
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int phy_ethtool_ksettings_set(struct phy_device *phydev,
			      const struct ethtool_link_ksettings *cmd)
{
	u8 autoneg = cmd->base.autoneg;
	u8 duplex = cmd->base.duplex;
	u32 speed = cmd->base.speed;
	u32 advertising;

	if (cmd->base.phy_address != phydev->mdio.addr)
		return -EINVAL;

	ethtool_convert_link_mode_to_legacy_u32(&advertising,
						cmd->link_modes.advertising);

	/* We make sure that we don't pass unsupported values in to the PHY */
	advertising &= phydev->supported;

	/* Verify the settings we care about. */
	if (autoneg != AUTONEG_ENABLE && autoneg != AUTONEG_DISABLE)
		return -EINVAL;

	if (autoneg == AUTONEG_ENABLE && advertising == 0)
		return -EINVAL;

	if (autoneg == AUTONEG_DISABLE &&
	    ((speed != SPEED_1000 &&
	      speed != SPEED_100 &&
	      speed != SPEED_10) ||
	     (duplex != DUPLEX_HALF &&
	      duplex != DUPLEX_FULL)))
		return -EINVAL;

	phydev->autoneg = autoneg;

	phydev->speed = speed;

	phydev->advertising = advertising;

	if (autoneg == AUTONEG_ENABLE)
		phydev->advertising |= ADVERTISED_Autoneg;
	else
		phydev->advertising &= ~ADVERTISED_Autoneg;

	phydev->duplex = duplex;

	phydev->mdix = cmd->base.eth_tp_mdix_ctrl;

	/* Restart the PHY */
	phy_start_aneg(phydev);

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_ksettings_set);

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int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd)
{
	cmd->supported = phydev->supported;

	cmd->advertising = phydev->advertising;
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	cmd->lp_advertising = phydev->lp_advertising;
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	ethtool_cmd_speed_set(cmd, phydev->speed);
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	cmd->duplex = phydev->duplex;
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	if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
		cmd->port = PORT_BNC;
	else
		cmd->port = PORT_MII;
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	cmd->phy_address = phydev->mdio.addr;
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	cmd->transceiver = phy_is_internal(phydev) ?
		XCVR_INTERNAL : XCVR_EXTERNAL;
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	cmd->autoneg = phydev->autoneg;
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	cmd->eth_tp_mdix_ctrl = phydev->mdix;
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	return 0;
}
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EXPORT_SYMBOL(phy_ethtool_gset);
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int phy_ethtool_ksettings_get(struct phy_device *phydev,
			      struct ethtool_link_ksettings *cmd)
{
	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
						phydev->supported);

	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
						phydev->advertising);

	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
						phydev->lp_advertising);

	cmd->base.speed = phydev->speed;
	cmd->base.duplex = phydev->duplex;
	if (phydev->interface == PHY_INTERFACE_MODE_MOCA)
		cmd->base.port = PORT_BNC;
	else
		cmd->base.port = PORT_MII;

	cmd->base.phy_address = phydev->mdio.addr;
	cmd->base.autoneg = phydev->autoneg;
	cmd->base.eth_tp_mdix_ctrl = phydev->mdix;

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_ksettings_get);
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/**
 * phy_mii_ioctl - generic PHY MII ioctl interface
 * @phydev: the phy_device struct
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 * @ifr: &struct ifreq for socket ioctl's
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 * @cmd: ioctl cmd to execute
 *
 * 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, struct ifreq *ifr, int cmd)
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{
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	struct mii_ioctl_data *mii_data = if_mii(ifr);
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	u16 val = mii_data->val_in;
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	bool change_autoneg = false;
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	switch (cmd) {
	case SIOCGMIIPHY:
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		mii_data->phy_id = phydev->mdio.addr;
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		/* fall through */

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	case SIOCGMIIREG:
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		mii_data->val_out = mdiobus_read(phydev->mdio.bus,
						 mii_data->phy_id,
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						 mii_data->reg_num);
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		return 0;
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	case SIOCSMIIREG:
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		if (mii_data->phy_id == phydev->mdio.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)) == 0) {
					if (phydev->autoneg == AUTONEG_ENABLE)
						change_autoneg = true;
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					phydev->autoneg = AUTONEG_DISABLE;
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					if (val & BMCR_FULLDPLX)
						phydev->duplex = DUPLEX_FULL;
					else
						phydev->duplex = DUPLEX_HALF;
					if (val & BMCR_SPEED1000)
						phydev->speed = SPEED_1000;
					else if (val & BMCR_SPEED100)
						phydev->speed = SPEED_100;
					else phydev->speed = SPEED_10;
				}
				else {
					if (phydev->autoneg == AUTONEG_DISABLE)
						change_autoneg = true;
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					phydev->autoneg = AUTONEG_ENABLE;
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				}
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				break;
			case MII_ADVERTISE:
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				phydev->advertising = mii_adv_to_ethtool_adv_t(val);
				change_autoneg = true;
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				break;
			default:
				/* do nothing */
				break;
			}
		}

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		mdiobus_write(phydev->mdio.bus, mii_data->phy_id,
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			      mii_data->reg_num, val);

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		if (mii_data->phy_id == phydev->mdio.addr &&
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		    mii_data->reg_num == MII_BMCR &&
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		    val & BMCR_RESET)
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			return phy_init_hw(phydev);
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		if (change_autoneg)
			return phy_start_aneg(phydev);

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		return 0;
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	case SIOCSHWTSTAMP:
		if (phydev->drv->hwtstamp)
			return phydev->drv->hwtstamp(phydev, ifr);
		/* fall through */

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	default:
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		return -EOPNOTSUPP;
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	}
}
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EXPORT_SYMBOL(phy_mii_ioctl);
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/**
 * phy_start_aneg - start auto-negotiation for this PHY device
 * @phydev: the phy_device struct
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 *
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 * Description: Sanitizes the settings (if we're not autonegotiating
 *   them), and then calls the driver's config_aneg function.
 *   If the PHYCONTROL Layer is operating, we change the state to
 *   reflect the beginning of Auto-negotiation or forcing.
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 */
int phy_start_aneg(struct phy_device *phydev)
{
	int err;

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	mutex_lock(&phydev->lock);
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	if (AUTONEG_DISABLE == phydev->autoneg)
		phy_sanitize_settings(phydev);

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	/* Invalidate LP advertising flags */
	phydev->lp_advertising = 0;

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	err = phydev->drv->config_aneg(phydev);
	if (err < 0)
		goto out_unlock;

	if (phydev->state != PHY_HALTED) {
		if (AUTONEG_ENABLE == phydev->autoneg) {
			phydev->state = PHY_AN;
			phydev->link_timeout = PHY_AN_TIMEOUT;
		} else {
			phydev->state = PHY_FORCING;
			phydev->link_timeout = PHY_FORCE_TIMEOUT;
		}
	}

out_unlock:
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	mutex_unlock(&phydev->lock);
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	return err;
}
EXPORT_SYMBOL(phy_start_aneg);

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/**
 * phy_start_machine - start PHY state machine tracking
 * @phydev: the phy_device struct
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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,
 *   etc.  This function starts the timer which tracks the state
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 *   of the PHY.  If you want to maintain your own state machine,
 *   do not call this function.
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 */
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void phy_start_machine(struct phy_device *phydev)
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{
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	queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ);
644 645
}

646 647 648 649 650 651 652 653 654 655 656 657 658 659 660
/**
 * phy_trigger_machine - trigger the state machine to run
 *
 * @phydev: the phy_device struct
 *
 * Description: There has been a change in state which requires that the
 *   state machine runs.
 */

static void phy_trigger_machine(struct phy_device *phydev)
{
	cancel_delayed_work_sync(&phydev->state_queue);
	queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0);
}

661 662 663
/**
 * phy_stop_machine - stop the PHY state machine tracking
 * @phydev: target phy_device struct
664
 *
665
 * Description: Stops the state machine timer, sets the state to UP
666
 *   (unless it wasn't up yet). This function must be called BEFORE
667 668 669 670
 *   phy_detach.
 */
void phy_stop_machine(struct phy_device *phydev)
{
671
	cancel_delayed_work_sync(&phydev->state_queue);
672

673
	mutex_lock(&phydev->lock);
674 675
	if (phydev->state > PHY_UP)
		phydev->state = PHY_UP;
676
	mutex_unlock(&phydev->lock);
677 678
}

679 680 681
/**
 * phy_error - enter HALTED state for this PHY device
 * @phydev: target phy_device struct
682 683 684 685 686 687
 *
 * Moves the PHY to the HALTED state in response to a read
 * or write error, and tells the controller the link is down.
 * Must not be called from interrupt context, or while the
 * phydev->lock is held.
 */
A
Andy Fleming 已提交
688
static void phy_error(struct phy_device *phydev)
689
{
690
	mutex_lock(&phydev->lock);
691
	phydev->state = PHY_HALTED;
692
	mutex_unlock(&phydev->lock);
693 694

	phy_trigger_machine(phydev);
695 696
}

697 698 699 700
/**
 * phy_interrupt - PHY interrupt handler
 * @irq: interrupt line
 * @phy_dat: phy_device pointer
A
Andy Fleming 已提交
701
 *
702
 * Description: When a PHY interrupt occurs, the handler disables
703
 * interrupts, and uses phy_change to handle the interrupt.
A
Andy Fleming 已提交
704
 */
705
static irqreturn_t phy_interrupt(int irq, void *phy_dat)
A
Andy Fleming 已提交
706 707 708
{
	struct phy_device *phydev = phy_dat;

709 710 711
	if (PHY_HALTED == phydev->state)
		return IRQ_NONE;		/* It can't be ours.  */

A
Andy Fleming 已提交
712
	disable_irq_nosync(irq);
713
	atomic_inc(&phydev->irq_disable);
A
Andy Fleming 已提交
714

715
	phy_change(phydev);
A
Andy Fleming 已提交
716 717 718 719

	return IRQ_HANDLED;
}

720 721 722 723
/**
 * phy_enable_interrupts - Enable the interrupts from the PHY side
 * @phydev: target phy_device struct
 */
724
static int phy_enable_interrupts(struct phy_device *phydev)
725
{
S
Sergei Shtylyov 已提交
726
	int err = phy_clear_interrupt(phydev);
727

A
Andy Fleming 已提交
728 729
	if (err < 0)
		return err;
730

S
Sergei Shtylyov 已提交
731
	return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED);
732 733
}

734 735 736 737
/**
 * phy_disable_interrupts - Disable the PHY interrupts from the PHY side
 * @phydev: target phy_device struct
 */
738
static int phy_disable_interrupts(struct phy_device *phydev)
739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758
{
	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;
}
A
Andy Fleming 已提交
759

760 761 762
/**
 * phy_start_interrupts - request and enable interrupts for a PHY device
 * @phydev: target phy_device struct
A
Andy Fleming 已提交
763
 *
764 765
 * Description: Request the interrupt for the given PHY.
 *   If this fails, then we set irq to PHY_POLL.
A
Andy Fleming 已提交
766 767
 *   Otherwise, we enable the interrupts in the PHY.
 *   This should only be called with a valid IRQ number.
768
 *   Returns 0 on success or < 0 on error.
A
Andy Fleming 已提交
769 770 771
 */
int phy_start_interrupts(struct phy_device *phydev)
{
772
	atomic_set(&phydev->irq_disable, 0);
773 774
	if (request_threaded_irq(phydev->irq, NULL, phy_interrupt,
				 IRQF_ONESHOT | IRQF_SHARED,
775
				 phydev_name(phydev), phydev) < 0) {
J
Joe Perches 已提交
776
		pr_warn("%s: Can't get IRQ %d (PHY)\n",
A
Andrew Lunn 已提交
777
			phydev->mdio.bus->name, phydev->irq);
A
Andy Fleming 已提交
778 779 780 781
		phydev->irq = PHY_POLL;
		return 0;
	}

782
	return phy_enable_interrupts(phydev);
A
Andy Fleming 已提交
783 784 785
}
EXPORT_SYMBOL(phy_start_interrupts);

786 787 788 789
/**
 * phy_stop_interrupts - disable interrupts from a PHY device
 * @phydev: target phy_device struct
 */
A
Andy Fleming 已提交
790 791
int phy_stop_interrupts(struct phy_device *phydev)
{
S
Sergei Shtylyov 已提交
792
	int err = phy_disable_interrupts(phydev);
A
Andy Fleming 已提交
793 794 795 796

	if (err)
		phy_error(phydev);

797 798
	free_irq(phydev->irq, phydev);

S
Sergei Shtylyov 已提交
799
	/* If work indeed has been cancelled, disable_irq() will have
800 801 802 803 804
	 * been left unbalanced from phy_interrupt() and enable_irq()
	 * has to be called so that other devices on the line work.
	 */
	while (atomic_dec_return(&phydev->irq_disable) >= 0)
		enable_irq(phydev->irq);
A
Andy Fleming 已提交
805 806 807 808 809

	return err;
}
EXPORT_SYMBOL(phy_stop_interrupts);

810
/**
811 812
 * phy_change - Called by the phy_interrupt to handle PHY changes
 * @phydev: phy_device struct that interrupted
813
 */
814
void phy_change(struct phy_device *phydev)
A
Andy Fleming 已提交
815
{
816 817 818 819
	if (phy_interrupt_is_valid(phydev)) {
		if (phydev->drv->did_interrupt &&
		    !phydev->drv->did_interrupt(phydev))
			goto ignore;
820

821 822 823
		if (phy_disable_interrupts(phydev))
			goto phy_err;
	}
A
Andy Fleming 已提交
824

825
	mutex_lock(&phydev->lock);
A
Andy Fleming 已提交
826 827
	if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state))
		phydev->state = PHY_CHANGELINK;
828
	mutex_unlock(&phydev->lock);
A
Andy Fleming 已提交
829

830 831 832
	if (phy_interrupt_is_valid(phydev)) {
		atomic_dec(&phydev->irq_disable);
		enable_irq(phydev->irq);
A
Andy Fleming 已提交
833

834 835 836 837 838
		/* Reenable interrupts */
		if (PHY_HALTED != phydev->state &&
		    phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED))
			goto irq_enable_err;
	}
A
Andy Fleming 已提交
839

840
	/* reschedule state queue work to run as soon as possible */
841
	phy_trigger_machine(phydev);
A
Andy Fleming 已提交
842 843
	return;

844 845 846 847 848
ignore:
	atomic_dec(&phydev->irq_disable);
	enable_irq(phydev->irq);
	return;

A
Andy Fleming 已提交
849 850
irq_enable_err:
	disable_irq(phydev->irq);
851
	atomic_inc(&phydev->irq_disable);
A
Andy Fleming 已提交
852 853 854 855
phy_err:
	phy_error(phydev);
}

856 857 858 859 860 861 862 863 864 865 866 867
/**
 * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes
 * @work: work_struct that describes the work to be done
 */
void phy_change_work(struct work_struct *work)
{
	struct phy_device *phydev =
		container_of(work, struct phy_device, phy_queue);

	phy_change(phydev);
}

868 869 870 871
/**
 * phy_stop - Bring down the PHY link, and stop checking the status
 * @phydev: target phy_device struct
 */
A
Andy Fleming 已提交
872 873
void phy_stop(struct phy_device *phydev)
{
874
	mutex_lock(&phydev->lock);
A
Andy Fleming 已提交
875 876 877 878

	if (PHY_HALTED == phydev->state)
		goto out_unlock;

879
	if (phy_interrupt_is_valid(phydev)) {
A
Andy Fleming 已提交
880 881 882
		/* Disable PHY Interrupts */
		phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED);

883 884 885
		/* Clear any pending interrupts */
		phy_clear_interrupt(phydev);
	}
A
Andy Fleming 已提交
886

887 888
	phydev->state = PHY_HALTED;

A
Andy Fleming 已提交
889
out_unlock:
890
	mutex_unlock(&phydev->lock);
891

S
Sergei Shtylyov 已提交
892
	/* Cannot call flush_scheduled_work() here as desired because
893 894 895
	 * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change()
	 * will not reenable interrupts.
	 */
A
Andy Fleming 已提交
896
}
S
Sergei Shtylyov 已提交
897
EXPORT_SYMBOL(phy_stop);
A
Andy Fleming 已提交
898

899 900 901
/**
 * phy_start - start or restart a PHY device
 * @phydev: target phy_device struct
A
Andy Fleming 已提交
902
 *
903
 * Description: Indicates the attached device's readiness to
A
Andy Fleming 已提交
904 905 906 907 908 909 910
 *   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)
{
911 912 913
	bool do_resume = false;
	int err = 0;

914
	mutex_lock(&phydev->lock);
A
Andy Fleming 已提交
915 916

	switch (phydev->state) {
F
Florian Fainelli 已提交
917 918 919 920 921 922 923
	case PHY_STARTING:
		phydev->state = PHY_PENDING;
		break;
	case PHY_READY:
		phydev->state = PHY_UP;
		break;
	case PHY_HALTED:
924
		/* make sure interrupts are re-enabled for the PHY */
925 926 927 928 929
		if (phydev->irq != PHY_POLL) {
			err = phy_enable_interrupts(phydev);
			if (err < 0)
				break;
		}
930

F
Florian Fainelli 已提交
931
		phydev->state = PHY_RESUMING;
932 933
		do_resume = true;
		break;
F
Florian Fainelli 已提交
934 935
	default:
		break;
A
Andy Fleming 已提交
936
	}
937
	mutex_unlock(&phydev->lock);
938 939 940 941

	/* if phy was suspended, bring the physical link up again */
	if (do_resume)
		phy_resume(phydev);
942 943

	phy_trigger_machine(phydev);
A
Andy Fleming 已提交
944 945
}
EXPORT_SYMBOL(phy_start);
946

947 948 949
static void phy_adjust_link(struct phy_device *phydev)
{
	phydev->adjust_link(phydev->attached_dev);
950
	phy_led_trigger_change_speed(phydev);
951 952
}

953 954 955 956
/**
 * phy_state_machine - Handle the state machine
 * @work: work_struct that describes the work to be done
 */
957
void phy_state_machine(struct work_struct *work)
958
{
959
	struct delayed_work *dwork = to_delayed_work(work);
960
	struct phy_device *phydev =
961
			container_of(dwork, struct phy_device, state_queue);
962
	bool needs_aneg = false, do_suspend = false;
963
	enum phy_state old_state;
964
	int err = 0;
965
	int old_link;
966

967
	mutex_lock(&phydev->lock);
968

969 970
	old_state = phydev->state;

971 972 973
	if (phydev->drv->link_change_notify)
		phydev->drv->link_change_notify(phydev);

F
Florian Fainelli 已提交
974 975 976 977 978 979 980
	switch (phydev->state) {
	case PHY_DOWN:
	case PHY_STARTING:
	case PHY_READY:
	case PHY_PENDING:
		break;
	case PHY_UP:
981
		needs_aneg = true;
982

F
Florian Fainelli 已提交
983 984 985 986 987 988
		phydev->link_timeout = PHY_AN_TIMEOUT;

		break;
	case PHY_AN:
		err = phy_read_status(phydev);
		if (err < 0)
989
			break;
990

S
Sergei Shtylyov 已提交
991
		/* If the link is down, give up on negotiation for now */
F
Florian Fainelli 已提交
992 993 994
		if (!phydev->link) {
			phydev->state = PHY_NOLINK;
			netif_carrier_off(phydev->attached_dev);
995
			phy_adjust_link(phydev);
F
Florian Fainelli 已提交
996 997
			break;
		}
998

S
Sergei Shtylyov 已提交
999
		/* Check if negotiation is done.  Break if there's an error */
F
Florian Fainelli 已提交
1000 1001 1002
		err = phy_aneg_done(phydev);
		if (err < 0)
			break;
1003

F
Florian Fainelli 已提交
1004 1005 1006 1007
		/* If AN is done, we're running */
		if (err > 0) {
			phydev->state = PHY_RUNNING;
			netif_carrier_on(phydev->attached_dev);
1008
			phy_adjust_link(phydev);
1009

1010
		} else if (0 == phydev->link_timeout--)
1011
			needs_aneg = true;
F
Florian Fainelli 已提交
1012 1013
		break;
	case PHY_NOLINK:
1014 1015 1016
		if (phy_interrupt_is_valid(phydev))
			break;

F
Florian Fainelli 已提交
1017 1018
		err = phy_read_status(phydev);
		if (err)
1019 1020
			break;

F
Florian Fainelli 已提交
1021
		if (phydev->link) {
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032
			if (AUTONEG_ENABLE == phydev->autoneg) {
				err = phy_aneg_done(phydev);
				if (err < 0)
					break;

				if (!err) {
					phydev->state = PHY_AN;
					phydev->link_timeout = PHY_AN_TIMEOUT;
					break;
				}
			}
F
Florian Fainelli 已提交
1033 1034
			phydev->state = PHY_RUNNING;
			netif_carrier_on(phydev->attached_dev);
1035
			phy_adjust_link(phydev);
F
Florian Fainelli 已提交
1036 1037 1038 1039 1040
		}
		break;
	case PHY_FORCING:
		err = genphy_update_link(phydev);
		if (err)
1041 1042
			break;

F
Florian Fainelli 已提交
1043 1044 1045 1046 1047
		if (phydev->link) {
			phydev->state = PHY_RUNNING;
			netif_carrier_on(phydev->attached_dev);
		} else {
			if (0 == phydev->link_timeout--)
1048
				needs_aneg = true;
F
Florian Fainelli 已提交
1049
		}
1050

1051
		phy_adjust_link(phydev);
F
Florian Fainelli 已提交
1052 1053
		break;
	case PHY_RUNNING:
1054 1055
		/* Only register a CHANGE if we are polling and link changed
		 * since latest checking.
F
Florian Fainelli 已提交
1056
		 */
1057
		if (phydev->irq == PHY_POLL) {
1058 1059 1060 1061 1062 1063 1064 1065
			old_link = phydev->link;
			err = phy_read_status(phydev);
			if (err)
				break;

			if (old_link != phydev->link)
				phydev->state = PHY_CHANGELINK;
		}
F
Florian Fainelli 已提交
1066 1067 1068 1069
		break;
	case PHY_CHANGELINK:
		err = phy_read_status(phydev);
		if (err)
1070 1071
			break;

F
Florian Fainelli 已提交
1072 1073 1074 1075 1076 1077 1078
		if (phydev->link) {
			phydev->state = PHY_RUNNING;
			netif_carrier_on(phydev->attached_dev);
		} else {
			phydev->state = PHY_NOLINK;
			netif_carrier_off(phydev->attached_dev);
		}
1079

1080
		phy_adjust_link(phydev);
1081

F
Florian Fainelli 已提交
1082 1083
		if (phy_interrupt_is_valid(phydev))
			err = phy_config_interrupt(phydev,
S
Sergei Shtylyov 已提交
1084
						   PHY_INTERRUPT_ENABLED);
F
Florian Fainelli 已提交
1085 1086 1087 1088 1089
		break;
	case PHY_HALTED:
		if (phydev->link) {
			phydev->link = 0;
			netif_carrier_off(phydev->attached_dev);
1090
			phy_adjust_link(phydev);
1091
			do_suspend = true;
F
Florian Fainelli 已提交
1092 1093 1094 1095 1096 1097
		}
		break;
	case PHY_RESUMING:
		if (AUTONEG_ENABLE == phydev->autoneg) {
			err = phy_aneg_done(phydev);
			if (err < 0)
1098 1099
				break;

F
Florian Fainelli 已提交
1100
			/* err > 0 if AN is done.
S
Sergei Shtylyov 已提交
1101 1102
			 * Otherwise, it's 0, and we're  still waiting for AN
			 */
F
Florian Fainelli 已提交
1103
			if (err > 0) {
1104 1105 1106 1107 1108 1109 1110
				err = phy_read_status(phydev);
				if (err)
					break;

				if (phydev->link) {
					phydev->state = PHY_RUNNING;
					netif_carrier_on(phydev->attached_dev);
S
Sergei Shtylyov 已提交
1111
				} else	{
1112
					phydev->state = PHY_NOLINK;
S
Sergei Shtylyov 已提交
1113
				}
1114
				phy_adjust_link(phydev);
F
Florian Fainelli 已提交
1115 1116 1117
			} else {
				phydev->state = PHY_AN;
				phydev->link_timeout = PHY_AN_TIMEOUT;
1118
			}
F
Florian Fainelli 已提交
1119 1120 1121 1122 1123 1124 1125 1126
		} else {
			err = phy_read_status(phydev);
			if (err)
				break;

			if (phydev->link) {
				phydev->state = PHY_RUNNING;
				netif_carrier_on(phydev->attached_dev);
S
Sergei Shtylyov 已提交
1127
			} else	{
F
Florian Fainelli 已提交
1128
				phydev->state = PHY_NOLINK;
S
Sergei Shtylyov 已提交
1129
			}
1130
			phy_adjust_link(phydev);
F
Florian Fainelli 已提交
1131 1132
		}
		break;
1133 1134
	}

1135
	mutex_unlock(&phydev->lock);
1136 1137 1138

	if (needs_aneg)
		err = phy_start_aneg(phydev);
1139
	else if (do_suspend)
1140 1141
		phy_suspend(phydev);

1142 1143 1144
	if (err < 0)
		phy_error(phydev);

1145 1146 1147
	phydev_dbg(phydev, "PHY state change %s -> %s\n",
		   phy_state_to_str(old_state),
		   phy_state_to_str(phydev->state));
1148

1149 1150 1151 1152 1153 1154 1155
	/* Only re-schedule a PHY state machine change if we are polling the
	 * PHY, if PHY_IGNORE_INTERRUPT is set, then we will be moving
	 * between states from phy_mac_interrupt()
	 */
	if (phydev->irq == PHY_POLL)
		queue_delayed_work(system_power_efficient_wq, &phydev->state_queue,
				   PHY_STATE_TIME * HZ);
1156
}
1157

1158 1159 1160 1161 1162 1163 1164 1165 1166
/**
 * phy_mac_interrupt - MAC says the link has changed
 * @phydev: phy_device struct with changed link
 * @new_link: Link is Up/Down.
 *
 * Description: The MAC layer is able indicate there has been a change
 *   in the PHY link status. Set the new link status, and trigger the
 *   state machine, work a work queue.
 */
1167 1168 1169
void phy_mac_interrupt(struct phy_device *phydev, int new_link)
{
	phydev->link = new_link;
1170 1171 1172

	/* Trigger a state machine change */
	queue_work(system_power_efficient_wq, &phydev->phy_queue);
1173 1174 1175
}
EXPORT_SYMBOL(phy_mac_interrupt);

1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190
static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad,
				    int addr)
{
	/* Write the desired MMD Devad */
	bus->write(bus, addr, MII_MMD_CTRL, devad);

	/* Write the desired MMD register address */
	bus->write(bus, addr, MII_MMD_DATA, prtad);

	/* Select the Function : DATA with no post increment */
	bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR));
}

/**
 * phy_read_mmd_indirect - reads data from the MMD registers
1191
 * @phydev: The PHY device bus
1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
 * @prtad: MMD Address
 * @devad: MMD DEVAD
 *
 * Description: it reads data from the MMD registers (clause 22 to access to
 * clause 45) of the specified phy address.
 * To read these register we have:
 * 1) Write reg 13 // DEVAD
 * 2) Write reg 14 // MMD Address
 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
 * 3) Read  reg 14 // Read MMD data
 */
1203
int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, int devad)
1204
{
1205
	struct phy_driver *phydrv = phydev->drv;
A
Andrew Lunn 已提交
1206
	int addr = phydev->mdio.addr;
1207
	int value = -1;
1208

S
Sergei Shtylyov 已提交
1209
	if (!phydrv->read_mmd_indirect) {
A
Andrew Lunn 已提交
1210
		struct mii_bus *bus = phydev->mdio.bus;
1211 1212 1213

		mutex_lock(&bus->mdio_lock);
		mmd_phy_indirect(bus, prtad, devad, addr);
1214 1215

		/* Read the content of the MMD's selected register */
1216 1217
		value = bus->read(bus, addr, MII_MMD_DATA);
		mutex_unlock(&bus->mdio_lock);
1218 1219 1220 1221
	} else {
		value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr);
	}
	return value;
1222
}
1223
EXPORT_SYMBOL(phy_read_mmd_indirect);
1224 1225 1226

/**
 * phy_write_mmd_indirect - writes data to the MMD registers
1227
 * @phydev: The PHY device
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
 * @prtad: MMD Address
 * @devad: MMD DEVAD
 * @data: data to write in the MMD register
 *
 * Description: Write data from the MMD registers of the specified
 * phy address.
 * To write these register we have:
 * 1) Write reg 13 // DEVAD
 * 2) Write reg 14 // MMD Address
 * 3) Write reg 13 // MMD Data Command for MMD DEVAD
 * 3) Write reg 14 // Write MMD data
 */
1240
void phy_write_mmd_indirect(struct phy_device *phydev, int prtad,
1241
				   int devad, u32 data)
1242
{
1243
	struct phy_driver *phydrv = phydev->drv;
A
Andrew Lunn 已提交
1244
	int addr = phydev->mdio.addr;
1245

S
Sergei Shtylyov 已提交
1246
	if (!phydrv->write_mmd_indirect) {
A
Andrew Lunn 已提交
1247
		struct mii_bus *bus = phydev->mdio.bus;
1248 1249 1250

		mutex_lock(&bus->mdio_lock);
		mmd_phy_indirect(bus, prtad, devad, addr);
1251 1252

		/* Write the data into MMD's selected register */
1253 1254
		bus->write(bus, addr, MII_MMD_DATA, data);
		mutex_unlock(&bus->mdio_lock);
1255 1256 1257
	} else {
		phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data);
	}
1258
}
1259
EXPORT_SYMBOL(phy_write_mmd_indirect);
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274

/**
 * phy_init_eee - init and check the EEE feature
 * @phydev: target phy_device struct
 * @clk_stop_enable: PHY may stop the clock during LPI
 *
 * Description: it checks if the Energy-Efficient Ethernet (EEE)
 * is supported by looking at the MMD registers 3.20 and 7.60/61
 * and it programs the MMD register 3.0 setting the "Clock stop enable"
 * bit if required.
 */
int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable)
{
	/* According to 802.3az,the EEE is supported only in full duplex-mode.
	 * Also EEE feature is active when core is operating with MII, GMII
1275 1276
	 * or RGMII (all kinds). Internal PHYs are also allowed to proceed and
	 * should return an error if they do not support EEE.
1277 1278 1279 1280
	 */
	if ((phydev->duplex == DUPLEX_FULL) &&
	    ((phydev->interface == PHY_INTERFACE_MODE_MII) ||
	    (phydev->interface == PHY_INTERFACE_MODE_GMII) ||
1281
	     phy_interface_is_rgmii(phydev) ||
1282
	     phy_is_internal(phydev))) {
1283 1284
		int eee_lp, eee_cap, eee_adv;
		u32 lp, cap, adv;
1285
		int status;
1286 1287 1288 1289 1290 1291 1292

		/* Read phy status to properly get the right settings */
		status = phy_read_status(phydev);
		if (status)
			return status;

		/* First check if the EEE ability is supported */
1293
		eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE,
1294
						MDIO_MMD_PCS);
1295 1296
		if (eee_cap <= 0)
			goto eee_exit_err;
1297

1298
		cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap);
1299
		if (!cap)
1300
			goto eee_exit_err;
1301 1302 1303 1304

		/* Check which link settings negotiated and verify it in
		 * the EEE advertising registers.
		 */
1305
		eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE,
1306
					       MDIO_MMD_AN);
1307 1308
		if (eee_lp <= 0)
			goto eee_exit_err;
1309

1310
		eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV,
1311
						MDIO_MMD_AN);
1312 1313
		if (eee_adv <= 0)
			goto eee_exit_err;
1314

1315 1316
		adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv);
		lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp);
1317
		if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv))
1318
			goto eee_exit_err;
1319 1320 1321 1322 1323

		if (clk_stop_enable) {
			/* Configure the PHY to stop receiving xMII
			 * clock while it is signaling LPI.
			 */
1324
			int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1,
1325
							MDIO_MMD_PCS);
1326 1327 1328 1329
			if (val < 0)
				return val;

			val |= MDIO_PCS_CTRL1_CLKSTOP_EN;
1330
			phy_write_mmd_indirect(phydev, MDIO_CTRL1,
1331
					       MDIO_MMD_PCS, val);
1332 1333
		}

1334
		return 0; /* EEE supported */
1335
	}
1336
eee_exit_err:
1337
	return -EPROTONOSUPPORT;
1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349
}
EXPORT_SYMBOL(phy_init_eee);

/**
 * phy_get_eee_err - report the EEE wake error count
 * @phydev: target phy_device struct
 *
 * Description: it is to report the number of time where the PHY
 * failed to complete its normal wake sequence.
 */
int phy_get_eee_err(struct phy_device *phydev)
{
1350
	return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, MDIO_MMD_PCS);
1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
}
EXPORT_SYMBOL(phy_get_eee_err);

/**
 * phy_ethtool_get_eee - get EEE supported and status
 * @phydev: target phy_device struct
 * @data: ethtool_eee data
 *
 * Description: it reportes the Supported/Advertisement/LP Advertisement
 * capabilities.
 */
int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data)
{
	int val;

	/* Get Supported EEE */
1367
	val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, MDIO_MMD_PCS);
1368 1369
	if (val < 0)
		return val;
1370
	data->supported = mmd_eee_cap_to_ethtool_sup_t(val);
1371 1372

	/* Get advertisement EEE */
1373
	val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN);
1374 1375
	if (val < 0)
		return val;
1376
	data->advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1377 1378

	/* Get LP advertisement EEE */
1379
	val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, MDIO_MMD_AN);
1380 1381
	if (val < 0)
		return val;
1382
	data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val);
1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_get_eee);

/**
 * phy_ethtool_set_eee - set EEE supported and status
 * @phydev: target phy_device struct
 * @data: ethtool_eee data
 *
 * Description: it is to program the Advertisement EEE register.
 */
int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data)
{
S
Sergei Shtylyov 已提交
1397
	int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised);
1398

1399 1400 1401
	/* Mask prohibited EEE modes */
	val &= ~phydev->eee_broken_modes;

1402
	phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val);
1403 1404 1405 1406

	return 0;
}
EXPORT_SYMBOL(phy_ethtool_set_eee);
1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422

int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
{
	if (phydev->drv->set_wol)
		return phydev->drv->set_wol(phydev, wol);

	return -EOPNOTSUPP;
}
EXPORT_SYMBOL(phy_ethtool_set_wol);

void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
{
	if (phydev->drv->get_wol)
		phydev->drv->get_wol(phydev, wol);
}
EXPORT_SYMBOL(phy_ethtool_get_wol);
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446

int phy_ethtool_get_link_ksettings(struct net_device *ndev,
				   struct ethtool_link_ksettings *cmd)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	return phy_ethtool_ksettings_get(phydev, cmd);
}
EXPORT_SYMBOL(phy_ethtool_get_link_ksettings);

int phy_ethtool_set_link_ksettings(struct net_device *ndev,
				   const struct ethtool_link_ksettings *cmd)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	return phy_ethtool_ksettings_set(phydev, cmd);
}
EXPORT_SYMBOL(phy_ethtool_set_link_ksettings);
1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457

int phy_ethtool_nway_reset(struct net_device *ndev)
{
	struct phy_device *phydev = ndev->phydev;

	if (!phydev)
		return -ENODEV;

	return genphy_restart_aneg(phydev);
}
EXPORT_SYMBOL(phy_ethtool_nway_reset);