[linux-2.6-block.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;
	ecmd->mdio_support =
		mdio->mode_support & (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22);

	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:
		ecmd->port = PORT_OTHER;
		ecmd->supported = 0;
		ecmd->advertising = 0;
		break;

	case MDIO_PMA_CTRL2_10GBKX4:
	case MDIO_PMA_CTRL2_10GBKR:
	case MDIO_PMA_CTRL2_1000BKX:
		ecmd->port = PORT_OTHER;
		ecmd->supported = SUPPORTED_Backplane;
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
				      MDIO_PMA_EXTABLE);
		if (reg & MDIO_PMA_EXTABLE_10GBKX4)
			ecmd->supported |= SUPPORTED_10000baseKX4_Full;
		if (reg & MDIO_PMA_EXTABLE_10GBKR)
			ecmd->supported |= SUPPORTED_10000baseKR_Full;
		if (reg & MDIO_PMA_EXTABLE_1000BKX)
			ecmd->supported |= SUPPORTED_1000baseKX_Full;
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
				      MDIO_PMA_10GBR_FECABLE);
		if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
			ecmd->supported |= SUPPORTED_10000baseR_FEC;
		ecmd->advertising = ADVERTISED_Backplane;
		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;
		int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
					      MDIO_MMD_AN, MDIO_STAT1);

		/* If AN is complete and successful, report best common
		 * mode, otherwise report best advertised mode. */
		if (an_stat & MDIO_AN_STAT1_COMPLETE) {
			ecmd->lp_advertising =
				mdio45_get_an(mdio, MDIO_AN_LPA) | npage_lpa;
			if (an_stat & MDIO_AN_STAT1_LPABLE)
				ecmd->lp_advertising |= ADVERTISED_Autoneg;
			modes = ecmd->advertising & ecmd->lp_advertising;
		}
		if ((modes & ~ADVERTISED_Autoneg) == 0)
			modes = ecmd->advertising;

		if (modes & (ADVERTISED_10000baseT_Full |
			     ADVERTISED_10000baseKX4_Full |
			     ADVERTISED_10000baseKR_Full)) {
			ecmd->speed = SPEED_10000;
			ecmd->duplex = DUPLEX_FULL;
		} else if (modes & (ADVERTISED_1000baseT_Full |
				    ADVERTISED_1000baseT_Half |
				    ADVERTISED_1000baseKX_Full)) {
			ecmd->speed = SPEED_1000;
			ecmd->duplex = !(modes & ADVERTISED_1000baseT_Half);
		} 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);
	}

	/* 10GBASE-T MDI/MDI-X */
	if (ecmd->port == PORT_TP && ecmd->speed == SPEED_10000) {
		switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
					MDIO_PMA_10GBT_SWAPPOL)) {
		case MDIO_PMA_10GBT_SWAPPOL_ABNX | MDIO_PMA_10GBT_SWAPPOL_CDNX:
			ecmd->eth_tp_mdix = ETH_TP_MDI;
			break;
		case 0:
			ecmd->eth_tp_mdix = ETH_TP_MDI_X;
			break;
		default:
			/* It's complicated... */
			ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
			break;
		}
	}
}
EXPORT_SYMBOL(mdio45_ethtool_gset_npage);

/**
 * mdio45_ethtool_spauseparam_an - set auto-negotiated pause parameters
 * @mdio: MDIO interface
 * @ecmd: Ethtool request structure
 *
 * This function assumes that the PHY has an auto-negotiation MMD.  It
 * will enable and disable advertising of flow control as appropriate.
 */
void mdio45_ethtool_spauseparam_an(const struct mdio_if_info *mdio,
				   const struct ethtool_pauseparam *ecmd)
{
	int adv, old_adv;

	WARN_ON(!(mdio->mmds & MDIO_DEVS_AN));

	old_adv = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
				  MDIO_AN_ADVERTISE);
	adv = old_adv & ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM);
	if (ecmd->autoneg)
		adv |= mii_advertise_flowctrl(
			(ecmd->rx_pause ? FLOW_CTRL_RX : 0) |
			(ecmd->tx_pause ? FLOW_CTRL_TX : 0));
	if (adv != old_adv) {
		mdio->mdio_write(mdio->dev, mdio->prtad, MDIO_MMD_AN,
				 MDIO_AN_ADVERTISE, adv);
		mdio45_nway_restart(mdio);
	}
}
EXPORT_SYMBOL(mdio45_ethtool_spauseparam_an);

/**
 * 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;
0c09c1a4 BH	176	ecmd->mdio_support =
0c09c1a4 BH	177	mdio->mode_support & (MDIO_SUPPORTS_C45 \| MDIO_SUPPORTS_C22);
1b1c2e95 BH	178
	179	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	180	MDIO_CTRL2);
	181	switch (reg & MDIO_PMA_CTRL2_TYPE) {
	182	case MDIO_PMA_CTRL2_10GBT:
	183	case MDIO_PMA_CTRL2_1000BT:
	184	case MDIO_PMA_CTRL2_100BTX:
	185	case MDIO_PMA_CTRL2_10BT:
	186	ecmd->port = PORT_TP;
	187	ecmd->supported = SUPPORTED_TP;
	188	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	189	MDIO_SPEED);
	190	if (reg & MDIO_SPEED_10G)
	191	ecmd->supported \|= SUPPORTED_10000baseT_Full;
	192	if (reg & MDIO_PMA_SPEED_1000)
	193	ecmd->supported \|= (SUPPORTED_1000baseT_Full \|
	194	SUPPORTED_1000baseT_Half);
	195	if (reg & MDIO_PMA_SPEED_100)
	196	ecmd->supported \|= (SUPPORTED_100baseT_Full \|
	197	SUPPORTED_100baseT_Half);
	198	if (reg & MDIO_PMA_SPEED_10)
	199	ecmd->supported \|= (SUPPORTED_10baseT_Full \|
	200	SUPPORTED_10baseT_Half);
	201	ecmd->advertising = ADVERTISED_TP;
	202	break;
	203
	204	case MDIO_PMA_CTRL2_10GBCX4:
894b19a6 BH	205	ecmd->port = PORT_OTHER;
	206	ecmd->supported = 0;
	207	ecmd->advertising = 0;
	208	break;
	209
1b1c2e95 BH	210	case MDIO_PMA_CTRL2_10GBKX4:
	211	case MDIO_PMA_CTRL2_10GBKR:
	212	case MDIO_PMA_CTRL2_1000BKX:
	213	ecmd->port = PORT_OTHER;
894b19a6 BH	214	ecmd->supported = SUPPORTED_Backplane;
	215	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	216	MDIO_PMA_EXTABLE);
	217	if (reg & MDIO_PMA_EXTABLE_10GBKX4)
	218	ecmd->supported \|= SUPPORTED_10000baseKX4_Full;
	219	if (reg & MDIO_PMA_EXTABLE_10GBKR)
	220	ecmd->supported \|= SUPPORTED_10000baseKR_Full;
	221	if (reg & MDIO_PMA_EXTABLE_1000BKX)
	222	ecmd->supported \|= SUPPORTED_1000baseKX_Full;
	223	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	224	MDIO_PMA_10GBR_FECABLE);
	225	if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
	226	ecmd->supported \|= SUPPORTED_10000baseR_FEC;
	227	ecmd->advertising = ADVERTISED_Backplane;
1b1c2e95 BH	228	break;
	229
	230	/* All the other defined modes are flavours of optical */
	231	default:
	232	ecmd->port = PORT_FIBRE;
	233	ecmd->supported = SUPPORTED_FIBRE;
	234	ecmd->advertising = ADVERTISED_FIBRE;
	235	break;
	236	}
	237
	238	if (mdio->mmds & MDIO_DEVS_AN) {
	239	ecmd->supported \|= SUPPORTED_Autoneg;
	240	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
	241	MDIO_CTRL1);
	242	if (reg & MDIO_AN_CTRL1_ENABLE) {
	243	ecmd->autoneg = AUTONEG_ENABLE;
	244	ecmd->advertising \|=
	245	ADVERTISED_Autoneg \|
	246	mdio45_get_an(mdio, MDIO_AN_ADVERTISE) \|
	247	npage_adv;
	248	} else {
	249	ecmd->autoneg = AUTONEG_DISABLE;
	250	}
	251	} else {
	252	ecmd->autoneg = AUTONEG_DISABLE;
	253	}
	254
	255	if (ecmd->autoneg) {
	256	u32 modes = 0;
0c09c1a4 BH	257	int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
0c09c1a4 BH	258	MDIO_MMD_AN, MDIO_STAT1);
1b1c2e95 BH	259
	260	/* If AN is complete and successful, report best common
	261	* mode, otherwise report best advertised mode. */
0c09c1a4 BH	262	if (an_stat & MDIO_AN_STAT1_COMPLETE) {
	263	ecmd->lp_advertising =
	264	mdio45_get_an(mdio, MDIO_AN_LPA) \| npage_lpa;
	265	if (an_stat & MDIO_AN_STAT1_LPABLE)
	266	ecmd->lp_advertising \|= ADVERTISED_Autoneg;
	267	modes = ecmd->advertising & ecmd->lp_advertising;
	268	}
	269	if ((modes & ~ADVERTISED_Autoneg) == 0)
1b1c2e95 BH	270	modes = ecmd->advertising;
1b1c2e95 BH	271
894b19a6 BH	272	if (modes & (ADVERTISED_10000baseT_Full \|
	273	ADVERTISED_10000baseKX4_Full \|
	274	ADVERTISED_10000baseKR_Full)) {
1b1c2e95 BH	275	ecmd->speed = SPEED_10000;
	276	ecmd->duplex = DUPLEX_FULL;
	277	} else if (modes & (ADVERTISED_1000baseT_Full \|
894b19a6 BH	278	ADVERTISED_1000baseT_Half \|
894b19a6 BH	279	ADVERTISED_1000baseKX_Full)) {
1b1c2e95	280	ecmd->speed = SPEED_1000;
894b19a6	281	ecmd->duplex = !(modes & ADVERTISED_1000baseT_Half);
1b1c2e95 BH	282	} else if (modes & (ADVERTISED_100baseT_Full \|
	283	ADVERTISED_100baseT_Half)) {
	284	ecmd->speed = SPEED_100;
	285	ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
	286	} else {
	287	ecmd->speed = SPEED_10;
	288	ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
	289	}
	290	} else {
	291	/* Report forced settings */
	292	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	293	MDIO_CTRL1);
	294	ecmd->speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1) *
	295	((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
	296	ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX \|\|
	297	ecmd->speed == SPEED_10000);
	298	}
d005ba6c BH	299
	300	/* 10GBASE-T MDI/MDI-X */
	301	if (ecmd->port == PORT_TP && ecmd->speed == SPEED_10000) {
	302	switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	303	MDIO_PMA_10GBT_SWAPPOL)) {
	304	case MDIO_PMA_10GBT_SWAPPOL_ABNX \| MDIO_PMA_10GBT_SWAPPOL_CDNX:
	305	ecmd->eth_tp_mdix = ETH_TP_MDI;
	306	break;
	307	case 0:
	308	ecmd->eth_tp_mdix = ETH_TP_MDI_X;
	309	break;
	310	default:
	311	/* It's complicated... */
	312	ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
	313	break;
	314	}
	315	}
1b1c2e95 BH	316	}
	317	EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
	318
af2a3eac BH	319	/**
	320	* mdio45_ethtool_spauseparam_an - set auto-negotiated pause parameters
	321	* @mdio: MDIO interface
	322	* @ecmd: Ethtool request structure
	323	*
	324	* This function assumes that the PHY has an auto-negotiation MMD. It
	325	* will enable and disable advertising of flow control as appropriate.
	326	*/
	327	void mdio45_ethtool_spauseparam_an(const struct mdio_if_info *mdio,
	328	const struct ethtool_pauseparam *ecmd)
	329	{
	330	int adv, old_adv;
	331
	332	WARN_ON(!(mdio->mmds & MDIO_DEVS_AN));
	333
	334	old_adv = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
	335	MDIO_AN_ADVERTISE);
	336	adv = old_adv & ~(ADVERTISE_PAUSE_CAP \| ADVERTISE_PAUSE_ASYM);
	337	if (ecmd->autoneg)
	338	adv \|= mii_advertise_flowctrl(
	339	(ecmd->rx_pause ? FLOW_CTRL_RX : 0) \|
	340	(ecmd->tx_pause ? FLOW_CTRL_TX : 0));
	341	if (adv != old_adv) {
	342	mdio->mdio_write(mdio->dev, mdio->prtad, MDIO_MMD_AN,
	343	MDIO_AN_ADVERTISE, adv);
	344	mdio45_nway_restart(mdio);
	345	}
	346	}
	347	EXPORT_SYMBOL(mdio45_ethtool_spauseparam_an);
	348
1b1c2e95 BH	349	/**
	350	* mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
	351	* @mdio: MDIO interface
	352	* @mii_data: MII ioctl data structure
	353	* @cmd: MII ioctl command
	354	*
	355	* Returns 0 on success, negative on error.
	356	*/
	357	int mdio_mii_ioctl(const struct mdio_if_info *mdio,
	358	struct mii_ioctl_data *mii_data, int cmd)
	359	{
	360	int prtad, devad;
	361	u16 addr = mii_data->reg_num;
	362
	363	/* Validate/convert cmd to one of SIOC{G,S}MIIREG */
	364	switch (cmd) {
	365	case SIOCGMIIPHY:
	366	if (mdio->prtad == MDIO_PRTAD_NONE)
	367	return -EOPNOTSUPP;
	368	mii_data->phy_id = mdio->prtad;
	369	cmd = SIOCGMIIREG;
	370	break;
	371	case SIOCGMIIREG:
	372	break;
	373	case SIOCSMIIREG:
	374	if (!capable(CAP_NET_ADMIN))
	375	return -EPERM;
	376	break;
	377	default:
	378	return -EOPNOTSUPP;
	379	}
	380
	381	/* Validate/convert phy_id */
	382	if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
	383	mdio_phy_id_is_c45(mii_data->phy_id)) {
	384	prtad = mdio_phy_id_prtad(mii_data->phy_id);
	385	devad = mdio_phy_id_devad(mii_data->phy_id);
	386	} else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
	387	mii_data->phy_id < 0x20) {
	388	prtad = mii_data->phy_id;
	389	devad = MDIO_DEVAD_NONE;
	390	addr &= 0x1f;
	391	} else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
	392	mdio->prtad != MDIO_PRTAD_NONE &&
	393	mii_data->phy_id == mdio->prtad) {
	394	/* Remap commonly-used MII registers. */
	395	prtad = mdio->prtad;
	396	switch (addr) {
	397	case MII_BMCR:
	398	case MII_BMSR:
	399	case MII_PHYSID1:
	400	case MII_PHYSID2:
	401	devad = __ffs(mdio->mmds);
	402	break;
	403	case MII_ADVERTISE:
	404	case MII_LPA:
	405	if (!(mdio->mmds & MDIO_DEVS_AN))
	406	return -EINVAL;
	407	devad = MDIO_MMD_AN;
	408	if (addr == MII_ADVERTISE)
	409	addr = MDIO_AN_ADVERTISE;
	410	else
	411	addr = MDIO_AN_LPA;
	412	break;
413	default:
414	return -EINVAL;
415	}
416	} else {
417	return -EINVAL;
418	}
419
420	if (cmd == SIOCGMIIREG) {
421	int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
422	if (rc < 0)
423	return rc;
424	mii_data->val_out = rc;
425	return 0;
426	} else {
427	return mdio->mdio_write(mdio->dev, prtad, devad, addr,
428	mii_data->val_in);
429	}
430	}
431	EXPORT_SYMBOL(mdio_mii_ioctl);