include/linux/mii.h - arm/linux-arm64-legacy - Git at Google

 /*
  * linux/mii.h: definitions for MII-compatible transceivers
  * Originally drivers/net/sunhme.h.
  *
  * Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
  */

 #ifndef __LINUX_MII_H__
 #define __LINUX_MII_H__

 #include <linux/types.h>

 /* Generic MII registers. */

 #define MII_BMCR            0x00        /* Basic mode control register */
 #define MII_BMSR            0x01        /* Basic mode status register  */
 #define MII_PHYSID1         0x02        /* PHYS ID 1                   */
 #define MII_PHYSID2         0x03        /* PHYS ID 2                   */
 #define MII_ADVERTISE       0x04        /* Advertisement control reg   */
 #define MII_LPA             0x05        /* Link partner ability reg    */
 #define MII_EXPANSION       0x06        /* Expansion register          */
 #define MII_CTRL1000        0x09        /* 1000BASE-T control          */
 #define MII_STAT1000        0x0a        /* 1000BASE-T status           */
 #define MII_ESTATUS	    0x0f	/* Extended Status */
 #define MII_DCOUNTER        0x12        /* Disconnect counter          */
 #define MII_FCSCOUNTER      0x13        /* False carrier counter       */
 #define MII_NWAYTEST        0x14        /* N-way auto-neg test reg     */
 #define MII_RERRCOUNTER     0x15        /* Receive error counter       */
 #define MII_SREVISION       0x16        /* Silicon revision            */
 #define MII_RESV1           0x17        /* Reserved...                 */
 #define MII_LBRERROR        0x18        /* Lpback, rx, bypass error    */
 #define MII_PHYADDR         0x19        /* PHY address                 */
 #define MII_RESV2           0x1a        /* Reserved...                 */
 #define MII_TPISTATUS       0x1b        /* TPI status for 10mbps       */
 #define MII_NCONFIG         0x1c        /* Network interface config    */

 /* Basic mode control register. */
 #define BMCR_RESV               0x003f  /* Unused...                   */
 #define BMCR_SPEED1000		0x0040  /* MSB of Speed (1000)         */
 #define BMCR_CTST               0x0080  /* Collision test              */
 #define BMCR_FULLDPLX           0x0100  /* Full duplex                 */
 #define BMCR_ANRESTART          0x0200  /* Auto negotiation restart    */
 #define BMCR_ISOLATE            0x0400  /* Disconnect DP83840 from MII */
 #define BMCR_PDOWN              0x0800  /* Powerdown the DP83840       */
 #define BMCR_ANENABLE           0x1000  /* Enable auto negotiation     */
 #define BMCR_SPEED100           0x2000  /* Select 100Mbps              */
 #define BMCR_LOOPBACK           0x4000  /* TXD loopback bits           */
 #define BMCR_RESET              0x8000  /* Reset the DP83840           */

 /* Basic mode status register. */
 #define BMSR_ERCAP              0x0001  /* Ext-reg capability          */
 #define BMSR_JCD                0x0002  /* Jabber detected             */
 #define BMSR_LSTATUS            0x0004  /* Link status                 */
 #define BMSR_ANEGCAPABLE        0x0008  /* Able to do auto-negotiation */
 #define BMSR_RFAULT             0x0010  /* Remote fault detected       */
 #define BMSR_ANEGCOMPLETE       0x0020  /* Auto-negotiation complete   */
 #define BMSR_RESV               0x00c0  /* Unused...                   */
 #define BMSR_ESTATEN		0x0100	/* Extended Status in R15 */
 #define BMSR_100HALF2           0x0200  /* Can do 100BASE-T2 HDX */
 #define BMSR_100FULL2           0x0400  /* Can do 100BASE-T2 FDX */
 #define BMSR_10HALF             0x0800  /* Can do 10mbps, half-duplex  */
 #define BMSR_10FULL             0x1000  /* Can do 10mbps, full-duplex  */
 #define BMSR_100HALF            0x2000  /* Can do 100mbps, half-duplex */
 #define BMSR_100FULL            0x4000  /* Can do 100mbps, full-duplex */
 #define BMSR_100BASE4           0x8000  /* Can do 100mbps, 4k packets  */

 /* Advertisement control register. */
 #define ADVERTISE_SLCT          0x001f  /* Selector bits               */
 #define ADVERTISE_CSMA          0x0001  /* Only selector supported     */
 #define ADVERTISE_10HALF        0x0020  /* Try for 10mbps half-duplex  */
 #define ADVERTISE_1000XFULL     0x0020  /* Try for 1000BASE-X full-duplex */
 #define ADVERTISE_10FULL        0x0040  /* Try for 10mbps full-duplex  */
 #define ADVERTISE_1000XHALF     0x0040  /* Try for 1000BASE-X half-duplex */
 #define ADVERTISE_100HALF       0x0080  /* Try for 100mbps half-duplex */
 #define ADVERTISE_1000XPAUSE    0x0080  /* Try for 1000BASE-X pause    */
 #define ADVERTISE_100FULL       0x0100  /* Try for 100mbps full-duplex */
 #define ADVERTISE_1000XPSE_ASYM 0x0100  /* Try for 1000BASE-X asym pause */
 #define ADVERTISE_100BASE4      0x0200  /* Try for 100mbps 4k packets  */
 #define ADVERTISE_PAUSE_CAP     0x0400  /* Try for pause               */
 #define ADVERTISE_PAUSE_ASYM    0x0800  /* Try for asymetric pause     */
 #define ADVERTISE_RESV          0x1000  /* Unused...                   */
 #define ADVERTISE_RFAULT        0x2000  /* Say we can detect faults    */
 #define ADVERTISE_LPACK         0x4000  /* Ack link partners response  */
 #define ADVERTISE_NPAGE         0x8000  /* Next page bit               */

 #define ADVERTISE_FULL (ADVERTISE_100FULL | ADVERTISE_10FULL | \
 			ADVERTISE_CSMA)
 #define ADVERTISE_ALL (ADVERTISE_10HALF | ADVERTISE_10FULL | \
                        ADVERTISE_100HALF | ADVERTISE_100FULL)

 /* Link partner ability register. */
 #define LPA_SLCT                0x001f  /* Same as advertise selector  */
 #define LPA_10HALF              0x0020  /* Can do 10mbps half-duplex   */
 #define LPA_1000XFULL           0x0020  /* Can do 1000BASE-X full-duplex */
 #define LPA_10FULL              0x0040  /* Can do 10mbps full-duplex   */
 #define LPA_1000XHALF           0x0040  /* Can do 1000BASE-X half-duplex */
 #define LPA_100HALF             0x0080  /* Can do 100mbps half-duplex  */
 #define LPA_1000XPAUSE          0x0080  /* Can do 1000BASE-X pause     */
 #define LPA_100FULL             0x0100  /* Can do 100mbps full-duplex  */
 #define LPA_1000XPAUSE_ASYM     0x0100  /* Can do 1000BASE-X pause asym*/
 #define LPA_100BASE4            0x0200  /* Can do 100mbps 4k packets   */
 #define LPA_PAUSE_CAP           0x0400  /* Can pause                   */
 #define LPA_PAUSE_ASYM          0x0800  /* Can pause asymetrically     */
 #define LPA_RESV                0x1000  /* Unused...                   */
 #define LPA_RFAULT              0x2000  /* Link partner faulted        */
 #define LPA_LPACK               0x4000  /* Link partner acked us       */
 #define LPA_NPAGE               0x8000  /* Next page bit               */

 #define LPA_DUPLEX		(LPA_10FULL | LPA_100FULL)
 #define LPA_100			(LPA_100FULL | LPA_100HALF | LPA_100BASE4)

 /* Expansion register for auto-negotiation. */
 #define EXPANSION_NWAY          0x0001  /* Can do N-way auto-nego      */
 #define EXPANSION_LCWP          0x0002  /* Got new RX page code word   */
 #define EXPANSION_ENABLENPAGE   0x0004  /* This enables npage words    */
 #define EXPANSION_NPCAPABLE     0x0008  /* Link partner supports npage */
 #define EXPANSION_MFAULTS       0x0010  /* Multiple faults detected    */
 #define EXPANSION_RESV          0xffe0  /* Unused...                   */

 #define ESTATUS_1000_TFULL	0x2000	/* Can do 1000BT Full */
 #define ESTATUS_1000_THALF	0x1000	/* Can do 1000BT Half */

 /* N-way test register. */
 #define NWAYTEST_RESV1          0x00ff  /* Unused...                   */
 #define NWAYTEST_LOOPBACK       0x0100  /* Enable loopback for N-way   */
 #define NWAYTEST_RESV2          0xfe00  /* Unused...                   */

 /* 1000BASE-T Control register */
 #define ADVERTISE_1000FULL      0x0200  /* Advertise 1000BASE-T full duplex */
 #define ADVERTISE_1000HALF      0x0100  /* Advertise 1000BASE-T half duplex */

 /* 1000BASE-T Status register */
 #define LPA_1000LOCALRXOK       0x2000  /* Link partner local receiver status */
 #define LPA_1000REMRXOK         0x1000  /* Link partner remote receiver status */
 #define LPA_1000FULL            0x0800  /* Link partner 1000BASE-T full duplex */
 #define LPA_1000HALF            0x0400  /* Link partner 1000BASE-T half duplex */

 /* Flow control flags */
 #define FLOW_CTRL_TX		0x01
 #define FLOW_CTRL_RX		0x02

 /* This structure is used in all SIOCxMIIxxx ioctl calls */
 struct mii_ioctl_data {
 	__u16		phy_id;
 	__u16		reg_num;
 	__u16		val_in;
 	__u16		val_out;
 };

 #ifdef __KERNEL__

 #include <linux/if.h>

 struct ethtool_cmd;

 struct mii_if_info {
 	int phy_id;
 	int advertising;
 	int phy_id_mask;
 	int reg_num_mask;

 	unsigned int full_duplex : 1;	/* is full duplex? */
 	unsigned int force_media : 1;	/* is autoneg. disabled? */
 	unsigned int supports_gmii : 1; /* are GMII registers supported? */

 	struct net_device *dev;
 	int (*mdio_read) (struct net_device *dev, int phy_id, int location);
 	void (*mdio_write) (struct net_device *dev, int phy_id, int location, int val);
 };

 extern int mii_link_ok (struct mii_if_info *mii);
 extern int mii_nway_restart (struct mii_if_info *mii);
 extern int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 extern int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd);
 extern int mii_check_gmii_support(struct mii_if_info *mii);
 extern void mii_check_link (struct mii_if_info *mii);
 extern unsigned int mii_check_media (struct mii_if_info *mii,
 				     unsigned int ok_to_print,
 				     unsigned int init_media);
 extern int generic_mii_ioctl(struct mii_if_info *mii_if,
                       	     struct mii_ioctl_data *mii_data, int cmd,
 			     unsigned int *duplex_changed);


 static inline struct mii_ioctl_data *if_mii(struct ifreq *rq)
 {
 	return (struct mii_ioctl_data *) &rq->ifr_ifru;
 }


 /**
  * mii_nway_result
  * @negotiated: value of MII ANAR and'd with ANLPAR
  *
  * Given a set of MII abilities, check each bit and returns the
  * currently supported media, in the priority order defined by
  * IEEE 802.3u.  We use LPA_xxx constants but note this is not the
  * value of LPA solely, as described above.
  *
  * The one exception to IEEE 802.3u is that 100baseT4 is placed
  * between 100T-full and 100T-half.  If your phy does not support
  * 100T4 this is fine.  If your phy places 100T4 elsewhere in the
  * priority order, you will need to roll your own function.
  */
 static inline unsigned int mii_nway_result (unsigned int negotiated)
 {
 	unsigned int ret;

 	if (negotiated & LPA_100FULL)
 		ret = LPA_100FULL;
 	else if (negotiated & LPA_100BASE4)
 		ret = LPA_100BASE4;
 	else if (negotiated & LPA_100HALF)
 		ret = LPA_100HALF;
 	else if (negotiated & LPA_10FULL)
 		ret = LPA_10FULL;
 	else
 		ret = LPA_10HALF;

 	return ret;
 }

 /**
  * mii_duplex
  * @duplex_lock: Non-zero if duplex is locked at full
  * @negotiated: value of MII ANAR and'd with ANLPAR
  *
  * A small helper function for a common case.  Returns one
  * if the media is operating or locked at full duplex, and
  * returns zero otherwise.
  */
 static inline unsigned int mii_duplex (unsigned int duplex_lock,
 				       unsigned int negotiated)
 {
 	if (duplex_lock)
 		return 1;
 	if (mii_nway_result(negotiated) & LPA_DUPLEX)
 		return 1;
 	return 0;
 }

 /**
  * mii_advertise_flowctrl - get flow control advertisement flags
  * @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
  */
 static inline u16 mii_advertise_flowctrl(int cap)
 {
 	u16 adv = 0;

 	if (cap & FLOW_CTRL_RX)
 		adv = ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM;
 	if (cap & FLOW_CTRL_TX)
 		adv ^= ADVERTISE_PAUSE_ASYM;

 	return adv;
 }

 /**
  * mii_resolve_flowctrl_fdx
  * @lcladv: value of MII ADVERTISE register
  * @rmtadv: value of MII LPA register
  *
  * Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
  */
 static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
 {
 	u8 cap = 0;

 	if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
 		cap = FLOW_CTRL_TX | FLOW_CTRL_RX;
 	} else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
 		if (lcladv & ADVERTISE_PAUSE_CAP)
 			cap = FLOW_CTRL_RX;
 		else if (rmtadv & ADVERTISE_PAUSE_CAP)
 			cap = FLOW_CTRL_TX;
 	}

 	return cap;
 }

 #endif /* __KERNEL__ */
 #endif /* __LINUX_MII_H__ */
	/*
	* linux/mii.h: definitions for MII-compatible transceivers
	* Originally drivers/net/sunhme.h.
	*
	* Copyright (C) 1996, 1999, 2001 David S. Miller (davem@redhat.com)
	*/

	#ifndef __LINUX_MII_H__
	#define __LINUX_MII_H__

	#include <linux/types.h>

	/* Generic MII registers. */

	#define MII_BMCR 0x00 /* Basic mode control register */
	#define MII_BMSR 0x01 /* Basic mode status register */
	#define MII_PHYSID1 0x02 /* PHYS ID 1 */
	#define MII_PHYSID2 0x03 /* PHYS ID 2 */
	#define MII_ADVERTISE 0x04 /* Advertisement control reg */
	#define MII_LPA 0x05 /* Link partner ability reg */
	#define MII_EXPANSION 0x06 /* Expansion register */
	#define MII_CTRL1000 0x09 /* 1000BASE-T control */
	#define MII_STAT1000 0x0a /* 1000BASE-T status */
	#define MII_ESTATUS 0x0f /* Extended Status */
	#define MII_DCOUNTER 0x12 /* Disconnect counter */
	#define MII_FCSCOUNTER 0x13 /* False carrier counter */
	#define MII_NWAYTEST 0x14 /* N-way auto-neg test reg */
	#define MII_RERRCOUNTER 0x15 /* Receive error counter */
	#define MII_SREVISION 0x16 /* Silicon revision */
	#define MII_RESV1 0x17 /* Reserved... */
	#define MII_LBRERROR 0x18 /* Lpback, rx, bypass error */
	#define MII_PHYADDR 0x19 /* PHY address */
	#define MII_RESV2 0x1a /* Reserved... */
	#define MII_TPISTATUS 0x1b /* TPI status for 10mbps */
	#define MII_NCONFIG 0x1c /* Network interface config */

	/* Basic mode control register. */
	#define BMCR_RESV 0x003f /* Unused... */
	#define BMCR_SPEED1000 0x0040 /* MSB of Speed (1000) */
	#define BMCR_CTST 0x0080 /* Collision test */
	#define BMCR_FULLDPLX 0x0100 /* Full duplex */
	#define BMCR_ANRESTART 0x0200 /* Auto negotiation restart */
	#define BMCR_ISOLATE 0x0400 /* Disconnect DP83840 from MII */
	#define BMCR_PDOWN 0x0800 /* Powerdown the DP83840 */
	#define BMCR_ANENABLE 0x1000 /* Enable auto negotiation */
	#define BMCR_SPEED100 0x2000 /* Select 100Mbps */
	#define BMCR_LOOPBACK 0x4000 /* TXD loopback bits */
	#define BMCR_RESET 0x8000 /* Reset the DP83840 */

	/* Basic mode status register. */
	#define BMSR_ERCAP 0x0001 /* Ext-reg capability */
	#define BMSR_JCD 0x0002 /* Jabber detected */
	#define BMSR_LSTATUS 0x0004 /* Link status */
	#define BMSR_ANEGCAPABLE 0x0008 /* Able to do auto-negotiation */
	#define BMSR_RFAULT 0x0010 /* Remote fault detected */
	#define BMSR_ANEGCOMPLETE 0x0020 /* Auto-negotiation complete */
	#define BMSR_RESV 0x00c0 /* Unused... */
	#define BMSR_ESTATEN 0x0100 /* Extended Status in R15 */
	#define BMSR_100HALF2 0x0200 /* Can do 100BASE-T2 HDX */
	#define BMSR_100FULL2 0x0400 /* Can do 100BASE-T2 FDX */
	#define BMSR_10HALF 0x0800 /* Can do 10mbps, half-duplex */
	#define BMSR_10FULL 0x1000 /* Can do 10mbps, full-duplex */
	#define BMSR_100HALF 0x2000 /* Can do 100mbps, half-duplex */
	#define BMSR_100FULL 0x4000 /* Can do 100mbps, full-duplex */
	#define BMSR_100BASE4 0x8000 /* Can do 100mbps, 4k packets */

	/* Advertisement control register. */
	#define ADVERTISE_SLCT 0x001f /* Selector bits */
	#define ADVERTISE_CSMA 0x0001 /* Only selector supported */
	#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
	#define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */
	#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
	#define ADVERTISE_1000XHALF 0x0040 /* Try for 1000BASE-X half-duplex */
	#define ADVERTISE_100HALF 0x0080 /* Try for 100mbps half-duplex */
	#define ADVERTISE_1000XPAUSE 0x0080 /* Try for 1000BASE-X pause */
	#define ADVERTISE_100FULL 0x0100 /* Try for 100mbps full-duplex */
	#define ADVERTISE_1000XPSE_ASYM 0x0100 /* Try for 1000BASE-X asym pause */
	#define ADVERTISE_100BASE4 0x0200 /* Try for 100mbps 4k packets */
	#define ADVERTISE_PAUSE_CAP 0x0400 /* Try for pause */
	#define ADVERTISE_PAUSE_ASYM 0x0800 /* Try for asymetric pause */
	#define ADVERTISE_RESV 0x1000 /* Unused... */
	#define ADVERTISE_RFAULT 0x2000 /* Say we can detect faults */
	#define ADVERTISE_LPACK 0x4000 /* Ack link partners response */
	#define ADVERTISE_NPAGE 0x8000 /* Next page bit */

	#define ADVERTISE_FULL (ADVERTISE_100FULL \| ADVERTISE_10FULL \| \
	ADVERTISE_CSMA)
	#define ADVERTISE_ALL (ADVERTISE_10HALF \| ADVERTISE_10FULL \| \
	ADVERTISE_100HALF \| ADVERTISE_100FULL)

	/* Link partner ability register. */
	#define LPA_SLCT 0x001f /* Same as advertise selector */
	#define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */
	#define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */
	#define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
	#define LPA_1000XHALF 0x0040 /* Can do 1000BASE-X half-duplex */
	#define LPA_100HALF 0x0080 /* Can do 100mbps half-duplex */
	#define LPA_1000XPAUSE 0x0080 /* Can do 1000BASE-X pause */
	#define LPA_100FULL 0x0100 /* Can do 100mbps full-duplex */
	#define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/
	#define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */
	#define LPA_PAUSE_CAP 0x0400 /* Can pause */
	#define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */
	#define LPA_RESV 0x1000 /* Unused... */
	#define LPA_RFAULT 0x2000 /* Link partner faulted */
	#define LPA_LPACK 0x4000 /* Link partner acked us */
	#define LPA_NPAGE 0x8000 /* Next page bit */

	#define LPA_DUPLEX (LPA_10FULL \| LPA_100FULL)
	#define LPA_100 (LPA_100FULL \| LPA_100HALF \| LPA_100BASE4)

	/* Expansion register for auto-negotiation. */
	#define EXPANSION_NWAY 0x0001 /* Can do N-way auto-nego */
	#define EXPANSION_LCWP 0x0002 /* Got new RX page code word */
	#define EXPANSION_ENABLENPAGE 0x0004 /* This enables npage words */
	#define EXPANSION_NPCAPABLE 0x0008 /* Link partner supports npage */
	#define EXPANSION_MFAULTS 0x0010 /* Multiple faults detected */
	#define EXPANSION_RESV 0xffe0 /* Unused... */

	#define ESTATUS_1000_TFULL 0x2000 /* Can do 1000BT Full */
	#define ESTATUS_1000_THALF 0x1000 /* Can do 1000BT Half */

	/* N-way test register. */
	#define NWAYTEST_RESV1 0x00ff /* Unused... */
	#define NWAYTEST_LOOPBACK 0x0100 /* Enable loopback for N-way */
	#define NWAYTEST_RESV2 0xfe00 /* Unused... */

	/* 1000BASE-T Control register */
	#define ADVERTISE_1000FULL 0x0200 /* Advertise 1000BASE-T full duplex */
	#define ADVERTISE_1000HALF 0x0100 /* Advertise 1000BASE-T half duplex */

	/* 1000BASE-T Status register */
	#define LPA_1000LOCALRXOK 0x2000 /* Link partner local receiver status */
	#define LPA_1000REMRXOK 0x1000 /* Link partner remote receiver status */
	#define LPA_1000FULL 0x0800 /* Link partner 1000BASE-T full duplex */
	#define LPA_1000HALF 0x0400 /* Link partner 1000BASE-T half duplex */

	/* Flow control flags */
	#define FLOW_CTRL_TX 0x01
	#define FLOW_CTRL_RX 0x02

	/* This structure is used in all SIOCxMIIxxx ioctl calls */
	struct mii_ioctl_data {
	__u16 phy_id;
	__u16 reg_num;
	__u16 val_in;
	__u16 val_out;
	};

	#ifdef __KERNEL__

	#include <linux/if.h>

	struct ethtool_cmd;

	struct mii_if_info {
	int phy_id;
	int advertising;
	int phy_id_mask;
	int reg_num_mask;

	unsigned int full_duplex : 1; /* is full duplex? */
	unsigned int force_media : 1; /* is autoneg. disabled? */
	unsigned int supports_gmii : 1; /* are GMII registers supported? */

	struct net_device *dev;
	int (mdio_read) (struct net_device dev, int phy_id, int location);
	void (mdio_write) (struct net_device dev, int phy_id, int location, int val);
	};

	extern int mii_link_ok (struct mii_if_info *mii);
	extern int mii_nway_restart (struct mii_if_info *mii);
	extern int mii_ethtool_gset(struct mii_if_info mii, struct ethtool_cmd ecmd);
	extern int mii_ethtool_sset(struct mii_if_info mii, struct ethtool_cmd ecmd);
	extern int mii_check_gmii_support(struct mii_if_info *mii);
	extern void mii_check_link (struct mii_if_info *mii);
	extern unsigned int mii_check_media (struct mii_if_info *mii,
	unsigned int ok_to_print,
	unsigned int init_media);
	extern int generic_mii_ioctl(struct mii_if_info *mii_if,
	struct mii_ioctl_data *mii_data, int cmd,
	unsigned int *duplex_changed);


	static inline struct mii_ioctl_data if_mii(struct ifreq rq)
	{
	return (struct mii_ioctl_data *) &rq->ifr_ifru;
	}


	/**
	* mii_nway_result
	* @negotiated: value of MII ANAR and'd with ANLPAR
	*
	* Given a set of MII abilities, check each bit and returns the
	* currently supported media, in the priority order defined by
	* IEEE 802.3u. We use LPA_xxx constants but note this is not the
	* value of LPA solely, as described above.
	*
	* The one exception to IEEE 802.3u is that 100baseT4 is placed
	* between 100T-full and 100T-half. If your phy does not support
	* 100T4 this is fine. If your phy places 100T4 elsewhere in the
	* priority order, you will need to roll your own function.
	*/
	static inline unsigned int mii_nway_result (unsigned int negotiated)
	{
	unsigned int ret;

	if (negotiated & LPA_100FULL)
	ret = LPA_100FULL;
	else if (negotiated & LPA_100BASE4)
	ret = LPA_100BASE4;
	else if (negotiated & LPA_100HALF)
	ret = LPA_100HALF;
	else if (negotiated & LPA_10FULL)
	ret = LPA_10FULL;
	else
	ret = LPA_10HALF;

	return ret;
	}

	/**
	* mii_duplex
	* @duplex_lock: Non-zero if duplex is locked at full
	* @negotiated: value of MII ANAR and'd with ANLPAR
	*
	* A small helper function for a common case. Returns one
	* if the media is operating or locked at full duplex, and
	* returns zero otherwise.
	*/
	static inline unsigned int mii_duplex (unsigned int duplex_lock,
	unsigned int negotiated)
	{
	if (duplex_lock)
	return 1;
	if (mii_nway_result(negotiated) & LPA_DUPLEX)
	return 1;
	return 0;
	}

	/**
	* mii_advertise_flowctrl - get flow control advertisement flags
	* @cap: Flow control capabilities (FLOW_CTRL_RX, FLOW_CTRL_TX or both)
	*/
	static inline u16 mii_advertise_flowctrl(int cap)
	{
	u16 adv = 0;

	if (cap & FLOW_CTRL_RX)
	adv = ADVERTISE_PAUSE_CAP \| ADVERTISE_PAUSE_ASYM;
	if (cap & FLOW_CTRL_TX)
	adv ^= ADVERTISE_PAUSE_ASYM;

	return adv;
	}

	/**
	* mii_resolve_flowctrl_fdx
	* @lcladv: value of MII ADVERTISE register
	* @rmtadv: value of MII LPA register
	*
	* Resolve full duplex flow control as per IEEE 802.3-2005 table 28B-3
	*/
	static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
	{
	u8 cap = 0;

	if (lcladv & rmtadv & ADVERTISE_PAUSE_CAP) {
	cap = FLOW_CTRL_TX \| FLOW_CTRL_RX;
	} else if (lcladv & rmtadv & ADVERTISE_PAUSE_ASYM) {
	if (lcladv & ADVERTISE_PAUSE_CAP)
	cap = FLOW_CTRL_RX;
	else if (rmtadv & ADVERTISE_PAUSE_CAP)
	cap = FLOW_CTRL_TX;
	}

	return cap;
	}

	#endif /* __KERNEL__ */
	#endif /* __LINUX_MII_H__ */