[net-next-2.6.git] / drivers / net / mdio.c

/*
 * mdio.c: Generic support for MDIO-compatible 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.
 */

#include <linux/kernel.h>
#include <linux/capability.h>
#include <linux/errno.h>
#include <linux/ethtool.h>
#include <linux/mdio.h>
#include <linux/module.h>

/**
 * mdio45_probe - probe for an MDIO (clause 45) device
 * @mdio: MDIO interface
 * @prtad: Expected PHY address
 *
 * This sets @prtad and @mmds in the MDIO interface if successful.
 * Returns 0 on success, negative on error.
 */
int mdio45_probe(struct mdio_if_info *mdio, int prtad)
{
	int mmd, stat2, devs1, devs2;

	/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
	 * XS or DTE XS; give up if none is present. */
	for (mmd = 1; mmd <= 5; mmd++) {
		/* Is this MMD present? */
		stat2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_STAT2);
		if (stat2 < 0 ||
		    (stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
			continue;

		/* It should tell us about all the other MMDs */
		devs1 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS1);
		devs2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS2);
		if (devs1 < 0 || devs2 < 0)
			continue;

		mdio->prtad = prtad;
		mdio->mmds = devs1 | (devs2 << 16);
		return 0;
	}

	return -ENODEV;
}
EXPORT_SYMBOL(mdio45_probe);

/**
 * mdio_set_flag - set or clear flag in an MDIO register
 * @mdio: MDIO interface
 * @prtad: PHY address
 * @devad: MMD address
 * @addr: Register address
 * @mask: Mask for flag (single bit set)
 * @sense: New value of flag
 *
 * This debounces changes: it does not write the register if the flag
 * already has the proper value.  Returns 0 on success, negative on error.
 */
int mdio_set_flag(const struct mdio_if_info *mdio,
		  int prtad, int devad, u16 addr, int mask,
		  bool sense)
{
	int old_val = mdio->mdio_read(mdio->dev, prtad, devad, addr);
	int new_val;

	if (old_val < 0)
		return old_val;
	if (sense)
		new_val = old_val | mask;
	else
		new_val = old_val & ~mask;
	if (old_val == new_val)
		return 0;
	return mdio->mdio_write(mdio->dev, prtad, devad, addr, new_val);
}
EXPORT_SYMBOL(mdio_set_flag);

/**
 * mdio_link_ok - is link status up/OK
 * @mdio: MDIO interface
 * @mmd_mask: Mask for MMDs to check
 *
 * Returns 1 if the PHY reports link status up/OK, 0 otherwise.
 * @mmd_mask is normally @mdio->mmds, but if loopback is enabled
 * the MMDs being bypassed should be excluded from the mask.
 */
int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask)
{
	int devad, reg;

	if (!mmd_mask) {
		/* Use absence of XGMII faults in lieu of link state */
		reg = mdio->mdio_read(mdio->dev, mdio->prtad,
				      MDIO_MMD_PHYXS, MDIO_STAT2);
		return reg >= 0 && !(reg & MDIO_STAT2_RXFAULT);
	}

	for (devad = 0; mmd_mask; devad++) {
		if (mmd_mask & (1 << devad)) {
			mmd_mask &= ~(1 << devad);

			/* Read twice because link state is latched and a
			 * read moves the current state into the register */
			mdio->mdio_read(mdio->dev, mdio->prtad,
					devad, MDIO_STAT1);
			reg = mdio->mdio_read(mdio->dev, mdio->prtad,
					      devad, MDIO_STAT1);
			if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
				return false;
		}
	}

	return true;
}
EXPORT_SYMBOL(mdio45_links_ok);

/**
 * mdio45_nway_restart - restart auto-negotiation for this interface
 * @mdio: MDIO interface
 *
 * Returns 0 on success, negative on error.
 */
int mdio45_nway_restart(const struct mdio_if_info *mdio)
{
	if (!(mdio->mmds & MDIO_DEVS_AN))
		return -EOPNOTSUPP;

	mdio_set_flag(mdio, mdio->prtad, MDIO_MMD_AN, MDIO_CTRL1,
		      MDIO_AN_CTRL1_RESTART, true);
	return 0;
}
EXPORT_SYMBOL(mdio45_nway_restart);

static u32 mdio45_get_an(const struct mdio_if_info *mdio, u16 addr)
{
	u32 result = 0;
	int reg;

	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN, addr);
	if (reg & ADVERTISE_10HALF)
		result |= ADVERTISED_10baseT_Half;
	if (reg & ADVERTISE_10FULL)
		result |= ADVERTISED_10baseT_Full;
	if (reg & ADVERTISE_100HALF)
		result |= ADVERTISED_100baseT_Half;
	if (reg & ADVERTISE_100FULL)
		result |= ADVERTISED_100baseT_Full;
	return result;
}

/**
 * mdio45_ethtool_gset_npage - get settings for ETHTOOL_GSET
 * @mdio: MDIO interface
 * @ecmd: Ethtool request structure
 * @npage_adv: Modes currently advertised on next pages
 * @npage_lpa: Modes advertised by link partner on next pages
 *
 * Since the CSRs for auto-negotiation using next pages are not fully
 * standardised, this function does not attempt to decode them.  The
 * caller must pass them in.
 */
void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
			       struct ethtool_cmd *ecmd,
			       u32 npage_adv, u32 npage_lpa)
{
	int reg;

	ecmd->transceiver = XCVR_INTERNAL;
	ecmd->phy_address = mdio->prtad;

	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
			      MDIO_CTRL2);
	switch (reg & MDIO_PMA_CTRL2_TYPE) {
	case MDIO_PMA_CTRL2_10GBT:
	case MDIO_PMA_CTRL2_1000BT:
	case MDIO_PMA_CTRL2_100BTX:
	case MDIO_PMA_CTRL2_10BT:
		ecmd->port = PORT_TP;
		ecmd->supported = SUPPORTED_TP;
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
				      MDIO_SPEED);
		if (reg & MDIO_SPEED_10G)
			ecmd->supported |= SUPPORTED_10000baseT_Full;
		if (reg & MDIO_PMA_SPEED_1000)
			ecmd->supported |= (SUPPORTED_1000baseT_Full |
					    SUPPORTED_1000baseT_Half);
		if (reg & MDIO_PMA_SPEED_100)
			ecmd->supported |= (SUPPORTED_100baseT_Full |
					    SUPPORTED_100baseT_Half);
		if (reg & MDIO_PMA_SPEED_10)
			ecmd->supported |= (SUPPORTED_10baseT_Full |
					    SUPPORTED_10baseT_Half);
		ecmd->advertising = ADVERTISED_TP;
		break;

	case MDIO_PMA_CTRL2_10GBCX4:
	case MDIO_PMA_CTRL2_10GBKX4:
	case MDIO_PMA_CTRL2_10GBKR:
	case MDIO_PMA_CTRL2_1000BKX:
		ecmd->port = PORT_OTHER;
		ecmd->supported = 0;
		ecmd->advertising = 0;
		break;

	/* All the other defined modes are flavours of optical */
	default:
		ecmd->port = PORT_FIBRE;
		ecmd->supported = SUPPORTED_FIBRE;
		ecmd->advertising = ADVERTISED_FIBRE;
		break;
	}

	if (mdio->mmds & MDIO_DEVS_AN) {
		ecmd->supported |= SUPPORTED_Autoneg;
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
				      MDIO_CTRL1);
		if (reg & MDIO_AN_CTRL1_ENABLE) {
			ecmd->autoneg = AUTONEG_ENABLE;
			ecmd->advertising |=
				ADVERTISED_Autoneg |
				mdio45_get_an(mdio, MDIO_AN_ADVERTISE) |
				npage_adv;
		} else {
			ecmd->autoneg = AUTONEG_DISABLE;
		}
	} else {
		ecmd->autoneg = AUTONEG_DISABLE;
	}

	if (ecmd->autoneg) {
		u32 modes = 0;

		/* If AN is complete and successful, report best common
		 * mode, otherwise report best advertised mode. */
		if (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
				    MDIO_STAT1) &
		    MDIO_AN_STAT1_COMPLETE)
			modes = (ecmd->advertising &
				 (mdio45_get_an(mdio, MDIO_AN_LPA) |
				  npage_lpa));
		if (modes == 0)
			modes = ecmd->advertising;

		if (modes & ADVERTISED_10000baseT_Full) {
			ecmd->speed = SPEED_10000;
			ecmd->duplex = DUPLEX_FULL;
		} else if (modes & (ADVERTISED_1000baseT_Full |
				    ADVERTISED_1000baseT_Half)) {
			ecmd->speed = SPEED_1000;
			ecmd->duplex = !!(modes & ADVERTISED_1000baseT_Full);
		} else if (modes & (ADVERTISED_100baseT_Full |
				    ADVERTISED_100baseT_Half)) {
			ecmd->speed = SPEED_100;
			ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
		} else {
			ecmd->speed = SPEED_10;
			ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
		}
	} else {
		/* Report forced settings */
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
				      MDIO_CTRL1);
		ecmd->speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1) *
			       ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
		ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX ||
				ecmd->speed == SPEED_10000);
	}
}
EXPORT_SYMBOL(mdio45_ethtool_gset_npage);

/**
 * mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
 * @mdio: MDIO interface
 * @mii_data: MII ioctl data structure
 * @cmd: MII ioctl command
 *
 * Returns 0 on success, negative on error.
 */
int mdio_mii_ioctl(const struct mdio_if_info *mdio,
		   struct mii_ioctl_data *mii_data, int cmd)
{
	int prtad, devad;
	u16 addr = mii_data->reg_num;

	/* Validate/convert cmd to one of SIOC{G,S}MIIREG */
	switch (cmd) {
	case SIOCGMIIPHY:
		if (mdio->prtad == MDIO_PRTAD_NONE)
			return -EOPNOTSUPP;
		mii_data->phy_id = mdio->prtad;
		cmd = SIOCGMIIREG;
		break;
	case SIOCGMIIREG:
		break;
	case SIOCSMIIREG:
		if (!capable(CAP_NET_ADMIN))
			return -EPERM;
		break;
	default:
		return -EOPNOTSUPP;
	}

	/* Validate/convert phy_id */
	if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
	    mdio_phy_id_is_c45(mii_data->phy_id)) {
		prtad = mdio_phy_id_prtad(mii_data->phy_id);
		devad = mdio_phy_id_devad(mii_data->phy_id);
	} else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
		   mii_data->phy_id < 0x20) {
		prtad = mii_data->phy_id;
		devad = MDIO_DEVAD_NONE;
		addr &= 0x1f;
	} else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
		   mdio->prtad != MDIO_PRTAD_NONE &&
		   mii_data->phy_id == mdio->prtad) {
		/* Remap commonly-used MII registers. */
		prtad = mdio->prtad;
		switch (addr) {
		case MII_BMCR:
		case MII_BMSR:
		case MII_PHYSID1:
		case MII_PHYSID2:
			devad = __ffs(mdio->mmds);
			break;
		case MII_ADVERTISE:
		case MII_LPA:
			if (!(mdio->mmds & MDIO_DEVS_AN))
				return -EINVAL;
			devad = MDIO_MMD_AN;
			if (addr == MII_ADVERTISE)
				addr = MDIO_AN_ADVERTISE;
			else
				addr = MDIO_AN_LPA;
			break;
		default:
			return -EINVAL;
		}
	} else {
		return -EINVAL;
	}

	if (cmd == SIOCGMIIREG) {
		int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
		if (rc < 0)
			return rc;
		mii_data->val_out = rc;
		return 0;
	} else {
		return mdio->mdio_write(mdio->dev, prtad, devad, addr,
					mii_data->val_in);
	}
}
EXPORT_SYMBOL(mdio_mii_ioctl);
Commit	Line	Data
1b1c2e95 BH	1	/*
	2	* mdio.c: Generic support for MDIO-compatible 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	*/
	9
	10	#include <linux/kernel.h>
	11	#include <linux/capability.h>
	12	#include <linux/errno.h>
	13	#include <linux/ethtool.h>
	14	#include <linux/mdio.h>
	15	#include <linux/module.h>
	16
	17	/**
	18	* mdio45_probe - probe for an MDIO (clause 45) device
	19	* @mdio: MDIO interface
	20	* @prtad: Expected PHY address
	21	*
	22	* This sets @prtad and @mmds in the MDIO interface if successful.
	23	* Returns 0 on success, negative on error.
	24	*/
	25	int mdio45_probe(struct mdio_if_info *mdio, int prtad)
	26	{
	27	int mmd, stat2, devs1, devs2;
	28
	29	/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
	30	* XS or DTE XS; give up if none is present. */
	31	for (mmd = 1; mmd <= 5; mmd++) {
	32	/* Is this MMD present? */
	33	stat2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_STAT2);
	34	if (stat2 < 0 \|\|
	35	(stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
	36	continue;
	37
	38	/* It should tell us about all the other MMDs */
	39	devs1 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS1);
	40	devs2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS2);
	41	if (devs1 < 0 \|\| devs2 < 0)
	42	continue;
	43
	44	mdio->prtad = prtad;
	45	mdio->mmds = devs1 \| (devs2 << 16);
	46	return 0;
	47	}
	48
	49	return -ENODEV;
	50	}
	51	EXPORT_SYMBOL(mdio45_probe);
	52
	53	/**
	54	* mdio_set_flag - set or clear flag in an MDIO register
	55	* @mdio: MDIO interface
	56	* @prtad: PHY address
	57	* @devad: MMD address
	58	* @addr: Register address
	59	* @mask: Mask for flag (single bit set)
	60	* @sense: New value of flag
	61	*
	62	* This debounces changes: it does not write the register if the flag
	63	* already has the proper value. Returns 0 on success, negative on error.
	64	*/
65	int mdio_set_flag(const struct mdio_if_info *mdio,
66	int prtad, int devad, u16 addr, int mask,
67	bool sense)
68	{
69	int old_val = mdio->mdio_read(mdio->dev, prtad, devad, addr);
70	int new_val;
71
72	if (old_val < 0)
73	return old_val;
74	if (sense)
75	new_val = old_val \| mask;
76	else
77	new_val = old_val & ~mask;
78	if (old_val == new_val)
79	return 0;
80	return mdio->mdio_write(mdio->dev, prtad, devad, addr, new_val);
81	}
82	EXPORT_SYMBOL(mdio_set_flag);
83
84	/**
85	* mdio_link_ok - is link status up/OK
86	* @mdio: MDIO interface
87	* @mmd_mask: Mask for MMDs to check
88	*
89	* Returns 1 if the PHY reports link status up/OK, 0 otherwise.
90	* @mmd_mask is normally @mdio->mmds, but if loopback is enabled
91	* the MMDs being bypassed should be excluded from the mask.
92	*/
93	int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask)
94	{
95	int devad, reg;
96
97	if (!mmd_mask) {
98	/* Use absence of XGMII faults in lieu of link state */
99	reg = mdio->mdio_read(mdio->dev, mdio->prtad,
100	MDIO_MMD_PHYXS, MDIO_STAT2);
101	return reg >= 0 && !(reg & MDIO_STAT2_RXFAULT);
102	}
103
104	for (devad = 0; mmd_mask; devad++) {
105	if (mmd_mask & (1 << devad)) {
106	mmd_mask &= ~(1 << devad);
107
108	/* Read twice because link state is latched and a
109	* read moves the current state into the register */
110	mdio->mdio_read(mdio->dev, mdio->prtad,
111	devad, MDIO_STAT1);
112	reg = mdio->mdio_read(mdio->dev, mdio->prtad,
113	devad, MDIO_STAT1);
114	if (reg < 0 \|\| !(reg & MDIO_STAT1_LSTATUS))
115	return false;
116	}
117	}
118
119	return true;
120	}
121	EXPORT_SYMBOL(mdio45_links_ok);
122
123	/**
124	* mdio45_nway_restart - restart auto-negotiation for this interface
125	* @mdio: MDIO interface
126	*
127	* Returns 0 on success, negative on error.
128	*/
129	int mdio45_nway_restart(const struct mdio_if_info *mdio)
130	{
131	if (!(mdio->mmds & MDIO_DEVS_AN))
132	return -EOPNOTSUPP;
133
134	mdio_set_flag(mdio, mdio->prtad, MDIO_MMD_AN, MDIO_CTRL1,
135	MDIO_AN_CTRL1_RESTART, true);
136	return 0;
137	}
138	EXPORT_SYMBOL(mdio45_nway_restart);
139
140	static u32 mdio45_get_an(const struct mdio_if_info *mdio, u16 addr)
141	{
142	u32 result = 0;
143	int reg;
144
145	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN, addr);
146	if (reg & ADVERTISE_10HALF)
147	result \|= ADVERTISED_10baseT_Half;
148	if (reg & ADVERTISE_10FULL)
149	result \|= ADVERTISED_10baseT_Full;
150	if (reg & ADVERTISE_100HALF)
151	result \|= ADVERTISED_100baseT_Half;
152	if (reg & ADVERTISE_100FULL)
153	result \|= ADVERTISED_100baseT_Full;
154	return result;
155	}
156
157	/**
158	* mdio45_ethtool_gset_npage - get settings for ETHTOOL_GSET
159	* @mdio: MDIO interface
160	* @ecmd: Ethtool request structure
161	* @npage_adv: Modes currently advertised on next pages
162	* @npage_lpa: Modes advertised by link partner on next pages
163	*
164	* Since the CSRs for auto-negotiation using next pages are not fully
165	* standardised, this function does not attempt to decode them. The
166	* caller must pass them in.
167	*/
168	void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
169	struct ethtool_cmd *ecmd,
170	u32 npage_adv, u32 npage_lpa)
171	{
172	int reg;
173
174	ecmd->transceiver = XCVR_INTERNAL;
175	ecmd->phy_address = mdio->prtad;
176
177	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
178	MDIO_CTRL2);
179	switch (reg & MDIO_PMA_CTRL2_TYPE) {
180	case MDIO_PMA_CTRL2_10GBT:
181	case MDIO_PMA_CTRL2_1000BT:
182	case MDIO_PMA_CTRL2_100BTX:
183	case MDIO_PMA_CTRL2_10BT:
184	ecmd->port = PORT_TP;
185	ecmd->supported = SUPPORTED_TP;
186	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
187	MDIO_SPEED);
188	if (reg & MDIO_SPEED_10G)
189	ecmd->supported \|= SUPPORTED_10000baseT_Full;
190	if (reg & MDIO_PMA_SPEED_1000)
191	ecmd->supported \|= (SUPPORTED_1000baseT_Full \|
192	SUPPORTED_1000baseT_Half);
193	if (reg & MDIO_PMA_SPEED_100)
194	ecmd->supported \|= (SUPPORTED_100baseT_Full \|
195	SUPPORTED_100baseT_Half);
196	if (reg & MDIO_PMA_SPEED_10)
197	ecmd->supported \|= (SUPPORTED_10baseT_Full \|
198	SUPPORTED_10baseT_Half);
199	ecmd->advertising = ADVERTISED_TP;
200	break;
201
202	case MDIO_PMA_CTRL2_10GBCX4:
203	case MDIO_PMA_CTRL2_10GBKX4:
204	case MDIO_PMA_CTRL2_10GBKR:
205	case MDIO_PMA_CTRL2_1000BKX:
206	ecmd->port = PORT_OTHER;
207	ecmd->supported = 0;
208	ecmd->advertising = 0;
209	break;
210
211	/* All the other defined modes are flavours of optical */
212	default:
213	ecmd->port = PORT_FIBRE;
214	ecmd->supported = SUPPORTED_FIBRE;
215	ecmd->advertising = ADVERTISED_FIBRE;
216	break;
217	}
218
219	if (mdio->mmds & MDIO_DEVS_AN) {
220	ecmd->supported \|= SUPPORTED_Autoneg;
221	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
222	MDIO_CTRL1);
223	if (reg & MDIO_AN_CTRL1_ENABLE) {
224	ecmd->autoneg = AUTONEG_ENABLE;
225	ecmd->advertising \|=
226	ADVERTISED_Autoneg \|
227	mdio45_get_an(mdio, MDIO_AN_ADVERTISE) \|
228	npage_adv;
229	} else {
230	ecmd->autoneg = AUTONEG_DISABLE;
231	}
232	} else {
233	ecmd->autoneg = AUTONEG_DISABLE;
234	}
235
236	if (ecmd->autoneg) {
237	u32 modes = 0;
238
239	/* If AN is complete and successful, report best common
240	* mode, otherwise report best advertised mode. */
241	if (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
242	MDIO_STAT1) &
243	MDIO_AN_STAT1_COMPLETE)
244	modes = (ecmd->advertising &
245	(mdio45_get_an(mdio, MDIO_AN_LPA) \|
246	npage_lpa));
247	if (modes == 0)
248	modes = ecmd->advertising;
249
250	if (modes & ADVERTISED_10000baseT_Full) {
251	ecmd->speed = SPEED_10000;
252	ecmd->duplex = DUPLEX_FULL;
253	} else if (modes & (ADVERTISED_1000baseT_Full \|
254	ADVERTISED_1000baseT_Half)) {
255	ecmd->speed = SPEED_1000;
256	ecmd->duplex = !!(modes & ADVERTISED_1000baseT_Full);
257	} else if (modes & (ADVERTISED_100baseT_Full \|
258	ADVERTISED_100baseT_Half)) {
259	ecmd->speed = SPEED_100;
260	ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
261	} else {
262	ecmd->speed = SPEED_10;
263	ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
264	}
265	} else {
266	/* Report forced settings */
267	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
268	MDIO_CTRL1);
269	ecmd->speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1) *
270	((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
271	ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX \|\|
272	ecmd->speed == SPEED_10000);
273	}
274	}
275	EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
276
277	/**
278	* mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
279	* @mdio: MDIO interface
280	* @mii_data: MII ioctl data structure
281	* @cmd: MII ioctl command
282	*
283	* Returns 0 on success, negative on error.
284	*/
285	int mdio_mii_ioctl(const struct mdio_if_info *mdio,
286	struct mii_ioctl_data *mii_data, int cmd)
287	{
288	int prtad, devad;
289	u16 addr = mii_data->reg_num;
290
291	/* Validate/convert cmd to one of SIOC{G,S}MIIREG */
292	switch (cmd) {
293	case SIOCGMIIPHY:
294	if (mdio->prtad == MDIO_PRTAD_NONE)
295	return -EOPNOTSUPP;
296	mii_data->phy_id = mdio->prtad;
297	cmd = SIOCGMIIREG;
298	break;
299	case SIOCGMIIREG:
300	break;
301	case SIOCSMIIREG:
302	if (!capable(CAP_NET_ADMIN))
303	return -EPERM;
304	break;
305	default:
306	return -EOPNOTSUPP;
307	}
308
309	/* Validate/convert phy_id */
310	if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
311	mdio_phy_id_is_c45(mii_data->phy_id)) {
312	prtad = mdio_phy_id_prtad(mii_data->phy_id);
313	devad = mdio_phy_id_devad(mii_data->phy_id);
314	} else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
315	mii_data->phy_id < 0x20) {
316	prtad = mii_data->phy_id;
317	devad = MDIO_DEVAD_NONE;
318	addr &= 0x1f;
319	} else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
320	mdio->prtad != MDIO_PRTAD_NONE &&
321	mii_data->phy_id == mdio->prtad) {
322	/* Remap commonly-used MII registers. */
323	prtad = mdio->prtad;
324	switch (addr) {
325	case MII_BMCR:
326	case MII_BMSR:
327	case MII_PHYSID1:
328	case MII_PHYSID2:
329	devad = __ffs(mdio->mmds);
330	break;
331	case MII_ADVERTISE:
332	case MII_LPA:
333	if (!(mdio->mmds & MDIO_DEVS_AN))
334	return -EINVAL;
335	devad = MDIO_MMD_AN;
336	if (addr == MII_ADVERTISE)
337	addr = MDIO_AN_ADVERTISE;
338	else
339	addr = MDIO_AN_LPA;
340	break;
341	default:
342	return -EINVAL;
343	}
344	} else {
345	return -EINVAL;
346	}
347
348	if (cmd == SIOCGMIIREG) {
349	int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
350	if (rc < 0)
351	return rc;
352	mii_data->val_out = rc;
353	return 0;
354	} else {
355	return mdio->mdio_write(mdio->dev, prtad, devad, addr,
356	mii_data->val_in);
357	}
358	}
359	EXPORT_SYMBOL(mdio_mii_ioctl);