[linux-2.6-block.git] / include / linux / mdio.h

/*
 * linux/mdio.h: definitions for MDIO (clause 45) transceivers
 * Copyright 2006-2009 Solarflare Communications Inc.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation, incorporated herein by reference.
 */
#ifndef __LINUX_MDIO_H__
#define __LINUX_MDIO_H__

#include <uapi/linux/mdio.h>
#include <linux/mod_devicetable.h>

struct gpio_desc;
struct mii_bus;

/* Multiple levels of nesting are possible. However typically this is
 * limited to nested DSA like layer, a MUX layer, and the normal
 * user. Instead of trying to handle the general case, just define
 * these cases.
 */
enum mdio_mutex_lock_class {
	MDIO_MUTEX_NORMAL,
	MDIO_MUTEX_MUX,
	MDIO_MUTEX_NESTED,
};

struct mdio_device {
	struct device dev;

	struct mii_bus *bus;
	char modalias[MDIO_NAME_SIZE];

	int (*bus_match)(struct device *dev, struct device_driver *drv);
	void (*device_free)(struct mdio_device *mdiodev);
	void (*device_remove)(struct mdio_device *mdiodev);

	/* Bus address of the MDIO device (0-31) */
	int addr;
	int flags;
	struct gpio_desc *reset;
	unsigned int reset_assert_delay;
	unsigned int reset_deassert_delay;
};
#define to_mdio_device(d) container_of(d, struct mdio_device, dev)

/* struct mdio_driver_common: Common to all MDIO drivers */
struct mdio_driver_common {
	struct device_driver driver;
	int flags;
};
#define MDIO_DEVICE_FLAG_PHY		1
#define to_mdio_common_driver(d) \
	container_of(d, struct mdio_driver_common, driver)

/* struct mdio_driver: Generic MDIO driver */
struct mdio_driver {
	struct mdio_driver_common mdiodrv;

	/*
	 * Called during discovery.  Used to set
	 * up device-specific structures, if any
	 */
	int (*probe)(struct mdio_device *mdiodev);

	/* Clears up any memory if needed */
	void (*remove)(struct mdio_device *mdiodev);
};
#define to_mdio_driver(d)						\
	container_of(to_mdio_common_driver(d), struct mdio_driver, mdiodrv)

void mdio_device_free(struct mdio_device *mdiodev);
struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr);
int mdio_device_register(struct mdio_device *mdiodev);
void mdio_device_remove(struct mdio_device *mdiodev);
void mdio_device_reset(struct mdio_device *mdiodev, int value);
int mdio_driver_register(struct mdio_driver *drv);
void mdio_driver_unregister(struct mdio_driver *drv);
int mdio_device_bus_match(struct device *dev, struct device_driver *drv);

static inline bool mdio_phy_id_is_c45(int phy_id)
{
	return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
}

static inline __u16 mdio_phy_id_prtad(int phy_id)
{
	return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
}

static inline __u16 mdio_phy_id_devad(int phy_id)
{
	return phy_id & MDIO_PHY_ID_DEVAD;
}

/**
 * struct mdio_if_info - Ethernet controller MDIO interface
 * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
 * @mmds: Mask of MMDs expected to be present in the PHY.  This must be
 *	non-zero unless @prtad = %MDIO_PRTAD_NONE.
 * @mode_support: MDIO modes supported.  If %MDIO_SUPPORTS_C22 is set then
 *	MII register access will be passed through with @devad =
 *	%MDIO_DEVAD_NONE.  If %MDIO_EMULATE_C22 is set then access to
 *	commonly used clause 22 registers will be translated into
 *	clause 45 registers.
 * @dev: Net device structure
 * @mdio_read: Register read function; returns value or negative error code
 * @mdio_write: Register write function; returns 0 or negative error code
 */
struct mdio_if_info {
	int prtad;
	u32 mmds;
	unsigned mode_support;

	struct net_device *dev;
	int (*mdio_read)(struct net_device *dev, int prtad, int devad,
			 u16 addr);
	int (*mdio_write)(struct net_device *dev, int prtad, int devad,
			  u16 addr, u16 val);
};

#define MDIO_PRTAD_NONE			(-1)
#define MDIO_DEVAD_NONE			(-1)
#define MDIO_SUPPORTS_C22		1
#define MDIO_SUPPORTS_C45		2
#define MDIO_EMULATE_C22		4

struct ethtool_cmd;
struct ethtool_pauseparam;
extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
extern int mdio_set_flag(const struct mdio_if_info *mdio,
			 int prtad, int devad, u16 addr, int mask,
			 bool sense);
extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
				      struct ethtool_cmd *ecmd,
				      u32 npage_adv, u32 npage_lpa);
extern void
mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio,
				   struct ethtool_link_ksettings *cmd,
				   u32 npage_adv, u32 npage_lpa);

/**
 * mdio45_ethtool_gset - get settings for ETHTOOL_GSET
 * @mdio: MDIO interface
 * @ecmd: Ethtool request structure
 *
 * Since the CSRs for auto-negotiation using next pages are not fully
 * standardised, this function does not attempt to decode them.  Use
 * mdio45_ethtool_gset_npage() to specify advertisement bits from next
 * pages.
 */
static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
				       struct ethtool_cmd *ecmd)
{
	mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
}

/**
 * mdio45_ethtool_ksettings_get - get settings for ETHTOOL_GLINKSETTINGS
 * @mdio: MDIO interface
 * @cmd: Ethtool request structure
 *
 * Since the CSRs for auto-negotiation using next pages are not fully
 * standardised, this function does not attempt to decode them.  Use
 * mdio45_ethtool_ksettings_get_npage() to specify advertisement bits
 * from next pages.
 */
static inline void
mdio45_ethtool_ksettings_get(const struct mdio_if_info *mdio,
			     struct ethtool_link_ksettings *cmd)
{
	mdio45_ethtool_ksettings_get_npage(mdio, cmd, 0, 0);
}

extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
			  struct mii_ioctl_data *mii_data, int cmd);

/**
 * mmd_eee_cap_to_ethtool_sup_t
 * @eee_cap: value of the MMD EEE Capability register
 *
 * A small helper function that translates MMD EEE Capability (3.20) bits
 * to ethtool supported settings.
 */
static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
{
	u32 supported = 0;

	if (eee_cap & MDIO_EEE_100TX)
		supported |= SUPPORTED_100baseT_Full;
	if (eee_cap & MDIO_EEE_1000T)
		supported |= SUPPORTED_1000baseT_Full;
	if (eee_cap & MDIO_EEE_10GT)
		supported |= SUPPORTED_10000baseT_Full;
	if (eee_cap & MDIO_EEE_1000KX)
		supported |= SUPPORTED_1000baseKX_Full;
	if (eee_cap & MDIO_EEE_10GKX4)
		supported |= SUPPORTED_10000baseKX4_Full;
	if (eee_cap & MDIO_EEE_10GKR)
		supported |= SUPPORTED_10000baseKR_Full;

	return supported;
}

/**
 * mmd_eee_adv_to_ethtool_adv_t
 * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
 *
 * A small helper function that translates the MMD EEE Advertisment (7.60)
 * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
 * settings.
 */
static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
{
	u32 adv = 0;

	if (eee_adv & MDIO_EEE_100TX)
		adv |= ADVERTISED_100baseT_Full;
	if (eee_adv & MDIO_EEE_1000T)
		adv |= ADVERTISED_1000baseT_Full;
	if (eee_adv & MDIO_EEE_10GT)
		adv |= ADVERTISED_10000baseT_Full;
	if (eee_adv & MDIO_EEE_1000KX)
		adv |= ADVERTISED_1000baseKX_Full;
	if (eee_adv & MDIO_EEE_10GKX4)
		adv |= ADVERTISED_10000baseKX4_Full;
	if (eee_adv & MDIO_EEE_10GKR)
		adv |= ADVERTISED_10000baseKR_Full;

	return adv;
}

/**
 * ethtool_adv_to_mmd_eee_adv_t
 * @adv: the ethtool advertisement settings
 *
 * A small helper function that translates ethtool advertisement settings
 * to EEE advertisements for the MMD EEE Advertisement (7.60) and
 * MMD EEE Link Partner Ability (7.61) registers.
 */
static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
{
	u16 reg = 0;

	if (adv & ADVERTISED_100baseT_Full)
		reg |= MDIO_EEE_100TX;
	if (adv & ADVERTISED_1000baseT_Full)
		reg |= MDIO_EEE_1000T;
	if (adv & ADVERTISED_10000baseT_Full)
		reg |= MDIO_EEE_10GT;
	if (adv & ADVERTISED_1000baseKX_Full)
		reg |= MDIO_EEE_1000KX;
	if (adv & ADVERTISED_10000baseKX4_Full)
		reg |= MDIO_EEE_10GKX4;
	if (adv & ADVERTISED_10000baseKR_Full)
		reg |= MDIO_EEE_10GKR;

	return reg;
}

int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);

int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum);
int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val);

int mdiobus_register_device(struct mdio_device *mdiodev);
int mdiobus_unregister_device(struct mdio_device *mdiodev);
bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr);

/**
 * mdio_module_driver() - Helper macro for registering mdio drivers
 *
 * Helper macro for MDIO drivers which do not do anything special in module
 * init/exit. Each module may only use this macro once, and calling it
 * replaces module_init() and module_exit().
 */
#define mdio_module_driver(_mdio_driver)				\
static int __init mdio_module_init(void)				\
{									\
	return mdio_driver_register(&_mdio_driver);			\
}									\
module_init(mdio_module_init);						\
static void __exit mdio_module_exit(void)				\
{									\
	mdio_driver_unregister(&_mdio_driver);				\
}									\
module_exit(mdio_module_exit)

#endif /* __LINUX_MDIO_H__ */
Commit	Line	Data
52c94dfa BH	1	/*
	2	* linux/mdio.h: definitions for MDIO (clause 45) transceivers
	3	* Copyright 2006-2009 Solarflare Communications Inc.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms of the GNU General Public License version 2 as published
	7	* by the Free Software Foundation, incorporated herein by reference.
	8	*/
52c94dfa BH	9	#ifndef __LINUX_MDIO_H__
	10	#define __LINUX_MDIO_H__
	11
607ca46e	12	#include <uapi/linux/mdio.h>
648ea013	13	#include <linux/mod_devicetable.h>
52c94dfa	14
bafbdd52	15	struct gpio_desc;
bac83c65	16	struct mii_bus;
9c717758	17
9a6f2b01 AL	18	/* Multiple levels of nesting are possible. However typically this is
	19	* limited to nested DSA like layer, a MUX layer, and the normal
	20	* user. Instead of trying to handle the general case, just define
	21	* these cases.
	22	*/
	23	enum mdio_mutex_lock_class {
	24	MDIO_MUTEX_NORMAL,
	25	MDIO_MUTEX_MUX,
	26	MDIO_MUTEX_NESTED,
	27	};
	28
e5a03bfd AL	29	struct mdio_device {
e5a03bfd AL	30	struct device dev;
a9049e0c	31
e5a03bfd	32	struct mii_bus *bus;
648ea013	33	char modalias[MDIO_NAME_SIZE];
711fdba3	34
e76a4957	35	int (bus_match)(struct device dev, struct device_driver *drv);
711fdba3 AL	36	void (device_free)(struct mdio_device mdiodev);
	37	void (device_remove)(struct mdio_device mdiodev);
	38
e5a03bfd AL	39	/* Bus address of the MDIO device (0-31) */
e5a03bfd AL	40	int addr;
7f854420	41	int flags;
bafbdd52	42	struct gpio_desc *reset;
04f629f7 RL	43	unsigned int reset_assert_delay;
04f629f7 RL	44	unsigned int reset_deassert_delay;
e5a03bfd AL	45	};
	46	#define to_mdio_device(d) container_of(d, struct mdio_device, dev)
	47
a9049e0c AL	48	/* struct mdio_driver_common: Common to all MDIO drivers */
	49	struct mdio_driver_common {
	50	struct device_driver driver;
	51	int flags;
	52	};
7f854420	53	#define MDIO_DEVICE_FLAG_PHY 1
a9049e0c AL	54	#define to_mdio_common_driver(d) \
	55	container_of(d, struct mdio_driver_common, driver)
	56
	57	/* struct mdio_driver: Generic MDIO driver */
	58	struct mdio_driver {
	59	struct mdio_driver_common mdiodrv;
	60
	61	/*
	62	* Called during discovery. Used to set
	63	* up device-specific structures, if any
	64	*/
	65	int (probe)(struct mdio_device mdiodev);
	66
	67	/* Clears up any memory if needed */
	68	void (remove)(struct mdio_device mdiodev);
	69	};
	70	#define to_mdio_driver(d) \
	71	container_of(to_mdio_common_driver(d), struct mdio_driver, mdiodrv)
	72
	73	void mdio_device_free(struct mdio_device *mdiodev);
	74	struct mdio_device mdio_device_create(struct mii_bus bus, int addr);
	75	int mdio_device_register(struct mdio_device *mdiodev);
	76	void mdio_device_remove(struct mdio_device *mdiodev);
bafbdd52	77	void mdio_device_reset(struct mdio_device *mdiodev, int value);
a9049e0c AL	78	int mdio_driver_register(struct mdio_driver *drv);
a9049e0c AL	79	void mdio_driver_unregister(struct mdio_driver *drv);
648ea013	80	int mdio_device_bus_match(struct device dev, struct device_driver drv);
7f854420	81
52c94dfa BH	82	static inline bool mdio_phy_id_is_c45(int phy_id)
	83	{
	84	return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
	85	}
	86
	87	static inline __u16 mdio_phy_id_prtad(int phy_id)
	88	{
	89	return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
	90	}
	91
	92	static inline __u16 mdio_phy_id_devad(int phy_id)
	93	{
	94	return phy_id & MDIO_PHY_ID_DEVAD;
	95	}
	96
1b1c2e95 BH	97	/**
	98	* struct mdio_if_info - Ethernet controller MDIO interface
	99	* @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
	100	* @mmds: Mask of MMDs expected to be present in the PHY. This must be
	101	* non-zero unless @prtad = %MDIO_PRTAD_NONE.
	102	* @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then
	103	* MII register access will be passed through with @devad =
	104	* %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to
	105	* commonly used clause 22 registers will be translated into
	106	* clause 45 registers.
	107	* @dev: Net device structure
	108	* @mdio_read: Register read function; returns value or negative error code
	109	* @mdio_write: Register write function; returns 0 or negative error code
	110	*/
	111	struct mdio_if_info {
	112	int prtad;
23428e6b	113	u32 mmds;
1b1c2e95 BH	114	unsigned mode_support;
	115
	116	struct net_device *dev;
	117	int (mdio_read)(struct net_device dev, int prtad, int devad,
	118	u16 addr);
	119	int (mdio_write)(struct net_device dev, int prtad, int devad,
	120	u16 addr, u16 val);
	121	};
	122
	123	#define MDIO_PRTAD_NONE (-1)
	124	#define MDIO_DEVAD_NONE (-1)
9c717758 BH	125	#define MDIO_SUPPORTS_C22 1
9c717758 BH	126	#define MDIO_SUPPORTS_C45 2
1b1c2e95 BH	127	#define MDIO_EMULATE_C22 4
	128
	129	struct ethtool_cmd;
	130	struct ethtool_pauseparam;
	131	extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
	132	extern int mdio_set_flag(const struct mdio_if_info *mdio,
	133	int prtad, int devad, u16 addr, int mask,
	134	bool sense);
	135	extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
	136	extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
	137	extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
	138	struct ethtool_cmd *ecmd,
	139	u32 npage_adv, u32 npage_lpa);
8e4881aa PR	140	extern void
	141	mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio,
	142	struct ethtool_link_ksettings *cmd,
	143	u32 npage_adv, u32 npage_lpa);
1b1c2e95 BH	144
	145	/**
	146	* mdio45_ethtool_gset - get settings for ETHTOOL_GSET
	147	* @mdio: MDIO interface
	148	* @ecmd: Ethtool request structure
	149	*
	150	* Since the CSRs for auto-negotiation using next pages are not fully
	151	* standardised, this function does not attempt to decode them. Use
	152	* mdio45_ethtool_gset_npage() to specify advertisement bits from next
	153	* pages.
	154	*/
	155	static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
	156	struct ethtool_cmd *ecmd)
	157	{
	158	mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
	159	}
	160
8e4881aa PR	161	/**
	162	* mdio45_ethtool_ksettings_get - get settings for ETHTOOL_GLINKSETTINGS
	163	* @mdio: MDIO interface
	164	* @cmd: Ethtool request structure
	165	*
	166	* Since the CSRs for auto-negotiation using next pages are not fully
	167	* standardised, this function does not attempt to decode them. Use
	168	* mdio45_ethtool_ksettings_get_npage() to specify advertisement bits
	169	* from next pages.
	170	*/
	171	static inline void
	172	mdio45_ethtool_ksettings_get(const struct mdio_if_info *mdio,
	173	struct ethtool_link_ksettings *cmd)
	174	{
	175	mdio45_ethtool_ksettings_get_npage(mdio, cmd, 0, 0);
	176	}
	177
1b1c2e95 BH	178	extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
	179	struct mii_ioctl_data *mii_data, int cmd);
	180
b32607dd AB	181	/**
	182	* mmd_eee_cap_to_ethtool_sup_t
	183	* @eee_cap: value of the MMD EEE Capability register
	184	*
	185	* A small helper function that translates MMD EEE Capability (3.20) bits
	186	* to ethtool supported settings.
	187	*/
	188	static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap)
	189	{
	190	u32 supported = 0;
	191
	192	if (eee_cap & MDIO_EEE_100TX)
	193	supported \|= SUPPORTED_100baseT_Full;
	194	if (eee_cap & MDIO_EEE_1000T)
	195	supported \|= SUPPORTED_1000baseT_Full;
	196	if (eee_cap & MDIO_EEE_10GT)
	197	supported \|= SUPPORTED_10000baseT_Full;
	198	if (eee_cap & MDIO_EEE_1000KX)
	199	supported \|= SUPPORTED_1000baseKX_Full;
	200	if (eee_cap & MDIO_EEE_10GKX4)
	201	supported \|= SUPPORTED_10000baseKX4_Full;
	202	if (eee_cap & MDIO_EEE_10GKR)
	203	supported \|= SUPPORTED_10000baseKR_Full;
	204
	205	return supported;
	206	}
	207
	208	/**
	209	* mmd_eee_adv_to_ethtool_adv_t
	210	* @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers
	211	*
	212	* A small helper function that translates the MMD EEE Advertisment (7.60)
	213	* and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement
	214	* settings.
	215	*/
	216	static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv)
	217	{
	218	u32 adv = 0;
	219
	220	if (eee_adv & MDIO_EEE_100TX)
	221	adv \|= ADVERTISED_100baseT_Full;
	222	if (eee_adv & MDIO_EEE_1000T)
	223	adv \|= ADVERTISED_1000baseT_Full;
	224	if (eee_adv & MDIO_EEE_10GT)
	225	adv \|= ADVERTISED_10000baseT_Full;
	226	if (eee_adv & MDIO_EEE_1000KX)
	227	adv \|= ADVERTISED_1000baseKX_Full;
	228	if (eee_adv & MDIO_EEE_10GKX4)
	229	adv \|= ADVERTISED_10000baseKX4_Full;
	230	if (eee_adv & MDIO_EEE_10GKR)
	231	adv \|= ADVERTISED_10000baseKR_Full;
	232
	233	return adv;
	234	}
	235
	236	/**
	237	* ethtool_adv_to_mmd_eee_adv_t
	238	* @adv: the ethtool advertisement settings
	239	*
	240	* A small helper function that translates ethtool advertisement settings
	241	* to EEE advertisements for the MMD EEE Advertisement (7.60) and
	242	* MMD EEE Link Partner Ability (7.61) registers.
	243	*/
	244	static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv)
245	{
246	u16 reg = 0;
247
248	if (adv & ADVERTISED_100baseT_Full)
249	reg \|= MDIO_EEE_100TX;
250	if (adv & ADVERTISED_1000baseT_Full)
251	reg \|= MDIO_EEE_1000T;
252	if (adv & ADVERTISED_10000baseT_Full)
253	reg \|= MDIO_EEE_10GT;
254	if (adv & ADVERTISED_1000baseKX_Full)
255	reg \|= MDIO_EEE_1000KX;
256	if (adv & ADVERTISED_10000baseKX4_Full)
257	reg \|= MDIO_EEE_10GKX4;
258	if (adv & ADVERTISED_10000baseKR_Full)
259	reg \|= MDIO_EEE_10GKR;
260
261	return reg;
262	}
263
34dc08e4 RK	264	int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
	265	int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
	266
bac83c65 AL	267	int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
	268	int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum);
	269	int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
	270	int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val);
	271
7f854420 AL	272	int mdiobus_register_device(struct mdio_device *mdiodev);
	273	int mdiobus_unregister_device(struct mdio_device *mdiodev);
	274	bool mdiobus_is_registered_device(struct mii_bus *bus, int addr);
	275	struct phy_device mdiobus_get_phy(struct mii_bus bus, int addr);
	276
a9049e0c	277	/**
b70f43a1	278	* mdio_module_driver() - Helper macro for registering mdio drivers
a9049e0c AL	279	*
	280	* Helper macro for MDIO drivers which do not do anything special in module
	281	* init/exit. Each module may only use this macro once, and calling it
	282	* replaces module_init() and module_exit().
	283	*/
	284	#define mdio_module_driver(_mdio_driver) \
	285	static int __init mdio_module_init(void) \
	286	{ \
	287	return mdio_driver_register(&_mdio_driver); \
	288	} \
	289	module_init(mdio_module_init); \
	290	static void __exit mdio_module_exit(void) \
	291	{ \
	292	mdio_driver_unregister(&_mdio_driver); \
	293	} \
	294	module_exit(mdio_module_exit)
	295
52c94dfa	296	#endif /* __LINUX_MDIO_H__ */