[linux.git] / drivers / net / mdio.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * mdio.c: Generic support for MDIO-compatible transceivers
 * Copyright 2006-2009 Solarflare Communications Inc.
 */

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

MODULE_DESCRIPTION("Generic support for MDIO-compatible transceivers");
MODULE_AUTHOR("Copyright 2006-2009 Solarflare Communications Inc.");
MODULE_LICENSE("GPL");

/**
 * 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);

/**
 * mdio45_links_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);

			/* Reset the latched status and fault flags */
			mdio->mdio_read(mdio->dev, mdio->prtad,
					devad, MDIO_STAT1);
			if (devad == MDIO_MMD_PMAPMD || devad == MDIO_MMD_PCS ||
			    devad == MDIO_MMD_PHYXS || devad == MDIO_MMD_DTEXS)
				mdio->mdio_read(mdio->dev, mdio->prtad,
						devad, MDIO_STAT2);

			/* Check the current status and fault flags */
			reg = mdio->mdio_read(mdio->dev, mdio->prtad,
					      devad, MDIO_STAT1);
			if (reg < 0 ||
			    (reg & (MDIO_STAT1_FAULT | MDIO_STAT1_LSTATUS)) !=
			    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;
	if (reg & ADVERTISE_PAUSE_CAP)
		result |= ADVERTISED_Pause;
	if (reg & ADVERTISE_PAUSE_ASYM)
		result |= ADVERTISED_Asym_Pause;
	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
 *
 * The @ecmd parameter is expected to have been cleared before calling
 * mdio45_ethtool_gset_npage().
 *
 * 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;
	u32 speed;

	BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
	BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);

	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)) {
			speed = SPEED_10000;
			ecmd->duplex = DUPLEX_FULL;
		} else if (modes & (ADVERTISED_1000baseT_Full |
				    ADVERTISED_1000baseT_Half |
				    ADVERTISED_1000baseKX_Full)) {
			speed = SPEED_1000;
			ecmd->duplex = !(modes & ADVERTISED_1000baseT_Half);
		} else if (modes & (ADVERTISED_100baseT_Full |
				    ADVERTISED_100baseT_Half)) {
			speed = SPEED_100;
			ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
		} else {
			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);
		speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1)
			 * ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
		ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX ||
				speed == SPEED_10000);
	}

	ethtool_cmd_speed_set(ecmd, speed);

	/* 10GBASE-T MDI/MDI-X */
	if (ecmd->port == PORT_TP
	    && (ethtool_cmd_speed(ecmd) == 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_ksettings_get_npage - get settings for ETHTOOL_GLINKSETTINGS
 * @mdio: MDIO interface
 * @cmd: Ethtool request structure
 * @npage_adv: Modes currently advertised on next pages
 * @npage_lpa: Modes advertised by link partner on next pages
 *
 * The @cmd parameter is expected to have been cleared before calling
 * mdio45_ethtool_ksettings_get_npage().
 *
 * 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_ksettings_get_npage(const struct mdio_if_info *mdio,
					struct ethtool_link_ksettings *cmd,
					u32 npage_adv, u32 npage_lpa)
{
	int reg;
	u32 speed, supported = 0, advertising = 0, lp_advertising = 0;

	BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
	BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);

	cmd->base.phy_address = mdio->prtad;
	cmd->base.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:
		cmd->base.port = PORT_TP;
		supported = SUPPORTED_TP;
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
				      MDIO_SPEED);
		if (reg & MDIO_SPEED_10G)
			supported |= SUPPORTED_10000baseT_Full;
		if (reg & MDIO_PMA_SPEED_1000)
			supported |= (SUPPORTED_1000baseT_Full |
					    SUPPORTED_1000baseT_Half);
		if (reg & MDIO_PMA_SPEED_100)
			supported |= (SUPPORTED_100baseT_Full |
					    SUPPORTED_100baseT_Half);
		if (reg & MDIO_PMA_SPEED_10)
			supported |= (SUPPORTED_10baseT_Full |
					    SUPPORTED_10baseT_Half);
		advertising = ADVERTISED_TP;
		break;

	case MDIO_PMA_CTRL2_10GBCX4:
		cmd->base.port = PORT_OTHER;
		supported = 0;
		advertising = 0;
		break;

	case MDIO_PMA_CTRL2_10GBKX4:
	case MDIO_PMA_CTRL2_10GBKR:
	case MDIO_PMA_CTRL2_1000BKX:
		cmd->base.port = PORT_OTHER;
		supported = SUPPORTED_Backplane;
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
				      MDIO_PMA_EXTABLE);
		if (reg & MDIO_PMA_EXTABLE_10GBKX4)
			supported |= SUPPORTED_10000baseKX4_Full;
		if (reg & MDIO_PMA_EXTABLE_10GBKR)
			supported |= SUPPORTED_10000baseKR_Full;
		if (reg & MDIO_PMA_EXTABLE_1000BKX)
			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)
			supported |= SUPPORTED_10000baseR_FEC;
		advertising = ADVERTISED_Backplane;
		break;

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

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

	if (cmd->base.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) {
			lp_advertising =
				mdio45_get_an(mdio, MDIO_AN_LPA) | npage_lpa;
			if (an_stat & MDIO_AN_STAT1_LPABLE)
				lp_advertising |= ADVERTISED_Autoneg;
			modes = advertising & lp_advertising;
		}
		if ((modes & ~ADVERTISED_Autoneg) == 0)
			modes = advertising;

		if (modes & (ADVERTISED_10000baseT_Full |
			     ADVERTISED_10000baseKX4_Full |
			     ADVERTISED_10000baseKR_Full)) {
			speed = SPEED_10000;
			cmd->base.duplex = DUPLEX_FULL;
		} else if (modes & (ADVERTISED_1000baseT_Full |
				    ADVERTISED_1000baseT_Half |
				    ADVERTISED_1000baseKX_Full)) {
			speed = SPEED_1000;
			cmd->base.duplex = !(modes & ADVERTISED_1000baseT_Half);
		} else if (modes & (ADVERTISED_100baseT_Full |
				    ADVERTISED_100baseT_Half)) {
			speed = SPEED_100;
			cmd->base.duplex = !!(modes & ADVERTISED_100baseT_Full);
		} else {
			speed = SPEED_10;
			cmd->base.duplex = !!(modes & ADVERTISED_10baseT_Full);
		}
	} else {
		/* Report forced settings */
		reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
				      MDIO_CTRL1);
		speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1)
			 * ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
		cmd->base.duplex = (reg & MDIO_CTRL1_FULLDPLX ||
				    speed == SPEED_10000);
	}

	cmd->base.speed = speed;

	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
						supported);
	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
						advertising);
	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
						lp_advertising);

	/* 10GBASE-T MDI/MDI-X */
	if (cmd->base.port == PORT_TP && (cmd->base.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:
			cmd->base.eth_tp_mdix = ETH_TP_MDI;
			break;
		case 0:
			cmd->base.eth_tp_mdix = ETH_TP_MDI_X;
			break;
		default:
			/* It's complicated... */
			cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
			break;
		}
	}
}
EXPORT_SYMBOL(mdio45_ethtool_ksettings_get_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:
	case SIOCSMIIREG:
		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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
1b1c2e95 BH	2	/*
	3	* mdio.c: Generic support for MDIO-compatible transceivers
	4	* Copyright 2006-2009 Solarflare Communications Inc.
1b1c2e95 BH	5	*/
	6
	7	#include <linux/kernel.h>
	8	#include <linux/capability.h>
	9	#include <linux/errno.h>
	10	#include <linux/ethtool.h>
	11	#include <linux/mdio.h>
	12	#include <linux/module.h>
	13
30767636 NR	14	MODULE_DESCRIPTION("Generic support for MDIO-compatible transceivers");
	15	MODULE_AUTHOR("Copyright 2006-2009 Solarflare Communications Inc.");
	16	MODULE_LICENSE("GPL");
	17
1b1c2e95 BH	18	/**
	19	* mdio45_probe - probe for an MDIO (clause 45) device
	20	* @mdio: MDIO interface
	21	* @prtad: Expected PHY address
	22	*
	23	* This sets @prtad and @mmds in the MDIO interface if successful.
	24	* Returns 0 on success, negative on error.
	25	*/
	26	int mdio45_probe(struct mdio_if_info *mdio, int prtad)
	27	{
	28	int mmd, stat2, devs1, devs2;
	29
	30	/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
	31	* XS or DTE XS; give up if none is present. */
	32	for (mmd = 1; mmd <= 5; mmd++) {
	33	/* Is this MMD present? */
	34	stat2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_STAT2);
	35	if (stat2 < 0 \|\|
	36	(stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
	37	continue;
	38
	39	/* It should tell us about all the other MMDs */
	40	devs1 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS1);
	41	devs2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS2);
	42	if (devs1 < 0 \|\| devs2 < 0)
	43	continue;
	44
	45	mdio->prtad = prtad;
	46	mdio->mmds = devs1 \| (devs2 << 16);
	47	return 0;
	48	}
	49
	50	return -ENODEV;
	51	}
	52	EXPORT_SYMBOL(mdio45_probe);
	53
	54	/**
	55	* mdio_set_flag - set or clear flag in an MDIO register
	56	* @mdio: MDIO interface
	57	* @prtad: PHY address
	58	* @devad: MMD address
	59	* @addr: Register address
	60	* @mask: Mask for flag (single bit set)
	61	* @sense: New value of flag
	62	*
	63	* This debounces changes: it does not write the register if the flag
	64	* already has the proper value. Returns 0 on success, negative on error.
	65	*/
	66	int mdio_set_flag(const struct mdio_if_info *mdio,
	67	int prtad, int devad, u16 addr, int mask,
	68	bool sense)
	69	{
	70	int old_val = mdio->mdio_read(mdio->dev, prtad, devad, addr);
	71	int new_val;
	72
	73	if (old_val < 0)
	74	return old_val;
	75	if (sense)
	76	new_val = old_val \| mask;
	77	else
	78	new_val = old_val & ~mask;
	79	if (old_val == new_val)
	80	return 0;
	81	return mdio->mdio_write(mdio->dev, prtad, devad, addr, new_val);
82	}
83	EXPORT_SYMBOL(mdio_set_flag);
84
85	/**
177cb787	86	* mdio45_links_ok - is link status up/OK
1b1c2e95 BH	87	* @mdio: MDIO interface
	88	* @mmd_mask: Mask for MMDs to check
	89	*
	90	* Returns 1 if the PHY reports link status up/OK, 0 otherwise.
	91	* @mmd_mask is normally @mdio->mmds, but if loopback is enabled
	92	* the MMDs being bypassed should be excluded from the mask.
	93	*/
	94	int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask)
	95	{
	96	int devad, reg;
	97
	98	if (!mmd_mask) {
	99	/* Use absence of XGMII faults in lieu of link state */
	100	reg = mdio->mdio_read(mdio->dev, mdio->prtad,
	101	MDIO_MMD_PHYXS, MDIO_STAT2);
	102	return reg >= 0 && !(reg & MDIO_STAT2_RXFAULT);
	103	}
	104
	105	for (devad = 0; mmd_mask; devad++) {
	106	if (mmd_mask & (1 << devad)) {
	107	mmd_mask &= ~(1 << devad);
	108
771046d7	109	/* Reset the latched status and fault flags */
1b1c2e95 BH	110	mdio->mdio_read(mdio->dev, mdio->prtad,
1b1c2e95 BH	111	devad, MDIO_STAT1);
771046d7 BH	112	if (devad == MDIO_MMD_PMAPMD \|\| devad == MDIO_MMD_PCS \|\|
	113	devad == MDIO_MMD_PHYXS \|\| devad == MDIO_MMD_DTEXS)
	114	mdio->mdio_read(mdio->dev, mdio->prtad,
	115	devad, MDIO_STAT2);
	116
	117	/* Check the current status and fault flags */
1b1c2e95 BH	118	reg = mdio->mdio_read(mdio->dev, mdio->prtad,
1b1c2e95 BH	119	devad, MDIO_STAT1);
771046d7 BH	120	if (reg < 0 \|\|
	121	(reg & (MDIO_STAT1_FAULT \| MDIO_STAT1_LSTATUS)) !=
	122	MDIO_STAT1_LSTATUS)
1b1c2e95 BH	123	return false;
	124	}
	125	}
	126
	127	return true;
	128	}
	129	EXPORT_SYMBOL(mdio45_links_ok);
	130
	131	/**
	132	* mdio45_nway_restart - restart auto-negotiation for this interface
	133	* @mdio: MDIO interface
	134	*
	135	* Returns 0 on success, negative on error.
	136	*/
	137	int mdio45_nway_restart(const struct mdio_if_info *mdio)
	138	{
	139	if (!(mdio->mmds & MDIO_DEVS_AN))
	140	return -EOPNOTSUPP;
	141
	142	mdio_set_flag(mdio, mdio->prtad, MDIO_MMD_AN, MDIO_CTRL1,
	143	MDIO_AN_CTRL1_RESTART, true);
	144	return 0;
	145	}
	146	EXPORT_SYMBOL(mdio45_nway_restart);
	147
	148	static u32 mdio45_get_an(const struct mdio_if_info *mdio, u16 addr)
	149	{
	150	u32 result = 0;
	151	int reg;
	152
	153	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN, addr);
	154	if (reg & ADVERTISE_10HALF)
	155	result \|= ADVERTISED_10baseT_Half;
	156	if (reg & ADVERTISE_10FULL)
	157	result \|= ADVERTISED_10baseT_Full;
	158	if (reg & ADVERTISE_100HALF)
	159	result \|= ADVERTISED_100baseT_Half;
	160	if (reg & ADVERTISE_100FULL)
	161	result \|= ADVERTISED_100baseT_Full;
27fbc7db BH	162	if (reg & ADVERTISE_PAUSE_CAP)
	163	result \|= ADVERTISED_Pause;
	164	if (reg & ADVERTISE_PAUSE_ASYM)
	165	result \|= ADVERTISED_Asym_Pause;
1b1c2e95 BH	166	return result;
	167	}
	168
	169	/**
	170	* mdio45_ethtool_gset_npage - get settings for ETHTOOL_GSET
	171	* @mdio: MDIO interface
	172	* @ecmd: Ethtool request structure
	173	* @npage_adv: Modes currently advertised on next pages
	174	* @npage_lpa: Modes advertised by link partner on next pages
	175	*
8ae6daca DD	176	* The @ecmd parameter is expected to have been cleared before calling
	177	* mdio45_ethtool_gset_npage().
	178	*
1b1c2e95 BH	179	* Since the CSRs for auto-negotiation using next pages are not fully
	180	* standardised, this function does not attempt to decode them. The
	181	* caller must pass them in.
	182	*/
	183	void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
	184	struct ethtool_cmd *ecmd,
	185	u32 npage_adv, u32 npage_lpa)
	186	{
	187	int reg;
70739497	188	u32 speed;
1b1c2e95	189
9c4df53b BH	190	BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
	191	BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);
	192
1b1c2e95 BH	193	ecmd->transceiver = XCVR_INTERNAL;
1b1c2e95 BH	194	ecmd->phy_address = mdio->prtad;
0c09c1a4 BH	195	ecmd->mdio_support =
0c09c1a4 BH	196	mdio->mode_support & (MDIO_SUPPORTS_C45 \| MDIO_SUPPORTS_C22);
1b1c2e95 BH	197
	198	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	199	MDIO_CTRL2);
	200	switch (reg & MDIO_PMA_CTRL2_TYPE) {
	201	case MDIO_PMA_CTRL2_10GBT:
	202	case MDIO_PMA_CTRL2_1000BT:
	203	case MDIO_PMA_CTRL2_100BTX:
	204	case MDIO_PMA_CTRL2_10BT:
	205	ecmd->port = PORT_TP;
	206	ecmd->supported = SUPPORTED_TP;
	207	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	208	MDIO_SPEED);
	209	if (reg & MDIO_SPEED_10G)
	210	ecmd->supported \|= SUPPORTED_10000baseT_Full;
	211	if (reg & MDIO_PMA_SPEED_1000)
	212	ecmd->supported \|= (SUPPORTED_1000baseT_Full \|
	213	SUPPORTED_1000baseT_Half);
	214	if (reg & MDIO_PMA_SPEED_100)
	215	ecmd->supported \|= (SUPPORTED_100baseT_Full \|
	216	SUPPORTED_100baseT_Half);
	217	if (reg & MDIO_PMA_SPEED_10)
	218	ecmd->supported \|= (SUPPORTED_10baseT_Full \|
	219	SUPPORTED_10baseT_Half);
	220	ecmd->advertising = ADVERTISED_TP;
	221	break;
	222
	223	case MDIO_PMA_CTRL2_10GBCX4:
894b19a6 BH	224	ecmd->port = PORT_OTHER;
	225	ecmd->supported = 0;
	226	ecmd->advertising = 0;
	227	break;
	228
1b1c2e95 BH	229	case MDIO_PMA_CTRL2_10GBKX4:
	230	case MDIO_PMA_CTRL2_10GBKR:
	231	case MDIO_PMA_CTRL2_1000BKX:
	232	ecmd->port = PORT_OTHER;
894b19a6 BH	233	ecmd->supported = SUPPORTED_Backplane;
	234	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	235	MDIO_PMA_EXTABLE);
	236	if (reg & MDIO_PMA_EXTABLE_10GBKX4)
	237	ecmd->supported \|= SUPPORTED_10000baseKX4_Full;
	238	if (reg & MDIO_PMA_EXTABLE_10GBKR)
	239	ecmd->supported \|= SUPPORTED_10000baseKR_Full;
	240	if (reg & MDIO_PMA_EXTABLE_1000BKX)
	241	ecmd->supported \|= SUPPORTED_1000baseKX_Full;
	242	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	243	MDIO_PMA_10GBR_FECABLE);
	244	if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
	245	ecmd->supported \|= SUPPORTED_10000baseR_FEC;
	246	ecmd->advertising = ADVERTISED_Backplane;
1b1c2e95 BH	247	break;
	248
	249	/* All the other defined modes are flavours of optical */
	250	default:
	251	ecmd->port = PORT_FIBRE;
	252	ecmd->supported = SUPPORTED_FIBRE;
	253	ecmd->advertising = ADVERTISED_FIBRE;
	254	break;
	255	}
	256
	257	if (mdio->mmds & MDIO_DEVS_AN) {
	258	ecmd->supported \|= SUPPORTED_Autoneg;
	259	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
	260	MDIO_CTRL1);
	261	if (reg & MDIO_AN_CTRL1_ENABLE) {
	262	ecmd->autoneg = AUTONEG_ENABLE;
	263	ecmd->advertising \|=
	264	ADVERTISED_Autoneg \|
	265	mdio45_get_an(mdio, MDIO_AN_ADVERTISE) \|
	266	npage_adv;
	267	} else {
	268	ecmd->autoneg = AUTONEG_DISABLE;
	269	}
	270	} else {
	271	ecmd->autoneg = AUTONEG_DISABLE;
	272	}
	273
	274	if (ecmd->autoneg) {
	275	u32 modes = 0;
0c09c1a4 BH	276	int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
0c09c1a4 BH	277	MDIO_MMD_AN, MDIO_STAT1);
1b1c2e95 BH	278
	279	/* If AN is complete and successful, report best common
	280	* mode, otherwise report best advertised mode. */
0c09c1a4 BH	281	if (an_stat & MDIO_AN_STAT1_COMPLETE) {
	282	ecmd->lp_advertising =
	283	mdio45_get_an(mdio, MDIO_AN_LPA) \| npage_lpa;
	284	if (an_stat & MDIO_AN_STAT1_LPABLE)
	285	ecmd->lp_advertising \|= ADVERTISED_Autoneg;
	286	modes = ecmd->advertising & ecmd->lp_advertising;
	287	}
	288	if ((modes & ~ADVERTISED_Autoneg) == 0)
1b1c2e95 BH	289	modes = ecmd->advertising;
1b1c2e95 BH	290
894b19a6 BH	291	if (modes & (ADVERTISED_10000baseT_Full \|
	292	ADVERTISED_10000baseKX4_Full \|
	293	ADVERTISED_10000baseKR_Full)) {
70739497	294	speed = SPEED_10000;
1b1c2e95 BH	295	ecmd->duplex = DUPLEX_FULL;
1b1c2e95 BH	296	} else if (modes & (ADVERTISED_1000baseT_Full \|
894b19a6 BH	297	ADVERTISED_1000baseT_Half \|
894b19a6 BH	298	ADVERTISED_1000baseKX_Full)) {
70739497	299	speed = SPEED_1000;
894b19a6	300	ecmd->duplex = !(modes & ADVERTISED_1000baseT_Half);
1b1c2e95 BH	301	} else if (modes & (ADVERTISED_100baseT_Full \|
1b1c2e95 BH	302	ADVERTISED_100baseT_Half)) {
70739497	303	speed = SPEED_100;
1b1c2e95 BH	304	ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
1b1c2e95 BH	305	} else {
70739497	306	speed = SPEED_10;
1b1c2e95 BH	307	ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
	308	}
	309	} else {
	310	/* Report forced settings */
	311	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	312	MDIO_CTRL1);
70739497 DD	313	speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1)
70739497 DD	314	* ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
1b1c2e95	315	ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX \|\|
70739497	316	speed == SPEED_10000);
1b1c2e95	317	}
d005ba6c	318
70739497 DD	319	ethtool_cmd_speed_set(ecmd, speed);
70739497 DD	320
d005ba6c	321	/* 10GBASE-T MDI/MDI-X */
70739497 DD	322	if (ecmd->port == PORT_TP
70739497 DD	323	&& (ethtool_cmd_speed(ecmd) == SPEED_10000)) {
d005ba6c BH	324	switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	325	MDIO_PMA_10GBT_SWAPPOL)) {
	326	case MDIO_PMA_10GBT_SWAPPOL_ABNX \| MDIO_PMA_10GBT_SWAPPOL_CDNX:
	327	ecmd->eth_tp_mdix = ETH_TP_MDI;
	328	break;
	329	case 0:
	330	ecmd->eth_tp_mdix = ETH_TP_MDI_X;
	331	break;
	332	default:
	333	/* It's complicated... */
	334	ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
	335	break;
	336	}
	337	}
1b1c2e95 BH	338	}
	339	EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
	340
8e4881aa PR	341	/**
	342	* mdio45_ethtool_ksettings_get_npage - get settings for ETHTOOL_GLINKSETTINGS
	343	* @mdio: MDIO interface
	344	* @cmd: Ethtool request structure
	345	* @npage_adv: Modes currently advertised on next pages
	346	* @npage_lpa: Modes advertised by link partner on next pages
	347	*
	348	* The @cmd parameter is expected to have been cleared before calling
	349	* mdio45_ethtool_ksettings_get_npage().
	350	*
	351	* Since the CSRs for auto-negotiation using next pages are not fully
	352	* standardised, this function does not attempt to decode them. The
	353	* caller must pass them in.
	354	*/
	355	void mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio,
	356	struct ethtool_link_ksettings *cmd,
	357	u32 npage_adv, u32 npage_lpa)
	358	{
	359	int reg;
	360	u32 speed, supported = 0, advertising = 0, lp_advertising = 0;
	361
	362	BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
	363	BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);
	364
	365	cmd->base.phy_address = mdio->prtad;
	366	cmd->base.mdio_support =
	367	mdio->mode_support & (MDIO_SUPPORTS_C45 \| MDIO_SUPPORTS_C22);
	368
	369	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	370	MDIO_CTRL2);
	371	switch (reg & MDIO_PMA_CTRL2_TYPE) {
	372	case MDIO_PMA_CTRL2_10GBT:
	373	case MDIO_PMA_CTRL2_1000BT:
	374	case MDIO_PMA_CTRL2_100BTX:
	375	case MDIO_PMA_CTRL2_10BT:
	376	cmd->base.port = PORT_TP;
	377	supported = SUPPORTED_TP;
	378	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	379	MDIO_SPEED);
	380	if (reg & MDIO_SPEED_10G)
	381	supported \|= SUPPORTED_10000baseT_Full;
	382	if (reg & MDIO_PMA_SPEED_1000)
	383	supported \|= (SUPPORTED_1000baseT_Full \|
	384	SUPPORTED_1000baseT_Half);
	385	if (reg & MDIO_PMA_SPEED_100)
	386	supported \|= (SUPPORTED_100baseT_Full \|
	387	SUPPORTED_100baseT_Half);
	388	if (reg & MDIO_PMA_SPEED_10)
	389	supported \|= (SUPPORTED_10baseT_Full \|
	390	SUPPORTED_10baseT_Half);
	391	advertising = ADVERTISED_TP;
	392	break;
	393
	394	case MDIO_PMA_CTRL2_10GBCX4:
	395	cmd->base.port = PORT_OTHER;
	396	supported = 0;
	397	advertising = 0;
	398	break;
	399
	400	case MDIO_PMA_CTRL2_10GBKX4:
	401	case MDIO_PMA_CTRL2_10GBKR:
	402	case MDIO_PMA_CTRL2_1000BKX:
	403	cmd->base.port = PORT_OTHER;
	404	supported = SUPPORTED_Backplane;
405	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
406	MDIO_PMA_EXTABLE);
407	if (reg & MDIO_PMA_EXTABLE_10GBKX4)
408	supported \|= SUPPORTED_10000baseKX4_Full;
409	if (reg & MDIO_PMA_EXTABLE_10GBKR)
410	supported \|= SUPPORTED_10000baseKR_Full;
411	if (reg & MDIO_PMA_EXTABLE_1000BKX)
412	supported \|= SUPPORTED_1000baseKX_Full;
413	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
414	MDIO_PMA_10GBR_FECABLE);
415	if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
416	supported \|= SUPPORTED_10000baseR_FEC;
417	advertising = ADVERTISED_Backplane;
418	break;
419
420	/* All the other defined modes are flavours of optical */
421	default:
422	cmd->base.port = PORT_FIBRE;
423	supported = SUPPORTED_FIBRE;
424	advertising = ADVERTISED_FIBRE;
425	break;
426	}
427
428	if (mdio->mmds & MDIO_DEVS_AN) {
429	supported \|= SUPPORTED_Autoneg;
430	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
431	MDIO_CTRL1);
432	if (reg & MDIO_AN_CTRL1_ENABLE) {
433	cmd->base.autoneg = AUTONEG_ENABLE;
434	advertising \|=
435	ADVERTISED_Autoneg \|
436	mdio45_get_an(mdio, MDIO_AN_ADVERTISE) \|
437	npage_adv;
438	} else {
439	cmd->base.autoneg = AUTONEG_DISABLE;
440	}
441	} else {
442	cmd->base.autoneg = AUTONEG_DISABLE;
443	}
444
445	if (cmd->base.autoneg) {
446	u32 modes = 0;
447	int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
448	MDIO_MMD_AN, MDIO_STAT1);
449
450	/* If AN is complete and successful, report best common
451	* mode, otherwise report best advertised mode.
452	*/
453	if (an_stat & MDIO_AN_STAT1_COMPLETE) {
454	lp_advertising =
455	mdio45_get_an(mdio, MDIO_AN_LPA) \| npage_lpa;
456	if (an_stat & MDIO_AN_STAT1_LPABLE)
457	lp_advertising \|= ADVERTISED_Autoneg;
458	modes = advertising & lp_advertising;
459	}
460	if ((modes & ~ADVERTISED_Autoneg) == 0)
461	modes = advertising;
462
463	if (modes & (ADVERTISED_10000baseT_Full \|
464	ADVERTISED_10000baseKX4_Full \|
465	ADVERTISED_10000baseKR_Full)) {
466	speed = SPEED_10000;
467	cmd->base.duplex = DUPLEX_FULL;
468	} else if (modes & (ADVERTISED_1000baseT_Full \|
469	ADVERTISED_1000baseT_Half \|
470	ADVERTISED_1000baseKX_Full)) {
471	speed = SPEED_1000;
472	cmd->base.duplex = !(modes & ADVERTISED_1000baseT_Half);
473	} else if (modes & (ADVERTISED_100baseT_Full \|
474	ADVERTISED_100baseT_Half)) {
475	speed = SPEED_100;
476	cmd->base.duplex = !!(modes & ADVERTISED_100baseT_Full);
477	} else {
478	speed = SPEED_10;
479	cmd->base.duplex = !!(modes & ADVERTISED_10baseT_Full);
480	}
481	} else {
482	/* Report forced settings */
483	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
484	MDIO_CTRL1);
485	speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1)
486	* ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
487	cmd->base.duplex = (reg & MDIO_CTRL1_FULLDPLX \|\|
488	speed == SPEED_10000);
489	}
490
491	cmd->base.speed = speed;
492
493	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
494	supported);
495	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
496	advertising);
497	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.lp_advertising,
498	lp_advertising);
499
500	/* 10GBASE-T MDI/MDI-X */
501	if (cmd->base.port == PORT_TP && (cmd->base.speed == SPEED_10000)) {
502	switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
503	MDIO_PMA_10GBT_SWAPPOL)) {
504	case MDIO_PMA_10GBT_SWAPPOL_ABNX \| MDIO_PMA_10GBT_SWAPPOL_CDNX:
505	cmd->base.eth_tp_mdix = ETH_TP_MDI;
506	break;
507	case 0:
508	cmd->base.eth_tp_mdix = ETH_TP_MDI_X;
509	break;
510	default:
511	/* It's complicated... */
512	cmd->base.eth_tp_mdix = ETH_TP_MDI_INVALID;
513	break;
514	}
515	}
516	}
517	EXPORT_SYMBOL(mdio45_ethtool_ksettings_get_npage);
518
1b1c2e95 BH	519	/**
	520	* mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
	521	* @mdio: MDIO interface
	522	* @mii_data: MII ioctl data structure
	523	* @cmd: MII ioctl command
	524	*
	525	* Returns 0 on success, negative on error.
	526	*/
	527	int mdio_mii_ioctl(const struct mdio_if_info *mdio,
	528	struct mii_ioctl_data *mii_data, int cmd)
	529	{
	530	int prtad, devad;
	531	u16 addr = mii_data->reg_num;
	532
	533	/* Validate/convert cmd to one of SIOC{G,S}MIIREG */
	534	switch (cmd) {
	535	case SIOCGMIIPHY:
	536	if (mdio->prtad == MDIO_PRTAD_NONE)
	537	return -EOPNOTSUPP;
	538	mii_data->phy_id = mdio->prtad;
	539	cmd = SIOCGMIIREG;
	540	break;
	541	case SIOCGMIIREG:
1b1c2e95	542	case SIOCSMIIREG:
1b1c2e95 BH	543	break;
	544	default:
	545	return -EOPNOTSUPP;
	546	}
	547
	548	/* Validate/convert phy_id */
	549	if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
	550	mdio_phy_id_is_c45(mii_data->phy_id)) {
	551	prtad = mdio_phy_id_prtad(mii_data->phy_id);
	552	devad = mdio_phy_id_devad(mii_data->phy_id);
	553	} else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
	554	mii_data->phy_id < 0x20) {
	555	prtad = mii_data->phy_id;
	556	devad = MDIO_DEVAD_NONE;
	557	addr &= 0x1f;
	558	} else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
	559	mdio->prtad != MDIO_PRTAD_NONE &&
	560	mii_data->phy_id == mdio->prtad) {
	561	/* Remap commonly-used MII registers. */
	562	prtad = mdio->prtad;
	563	switch (addr) {
	564	case MII_BMCR:
	565	case MII_BMSR:
	566	case MII_PHYSID1:
	567	case MII_PHYSID2:
	568	devad = __ffs(mdio->mmds);
	569	break;
	570	case MII_ADVERTISE:
	571	case MII_LPA:
	572	if (!(mdio->mmds & MDIO_DEVS_AN))
	573	return -EINVAL;
	574	devad = MDIO_MMD_AN;
	575	if (addr == MII_ADVERTISE)
	576	addr = MDIO_AN_ADVERTISE;
	577	else
	578	addr = MDIO_AN_LPA;
	579	break;
	580	default:
	581	return -EINVAL;
	582	}
	583	} else {
	584	return -EINVAL;
	585	}
	586
	587	if (cmd == SIOCGMIIREG) {
	588	int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
	589	if (rc < 0)
	590	return rc;
	591	mii_data->val_out = rc;
	592	return 0;
	593	} else {
	594	return mdio->mdio_write(mdio->dev, prtad, devad, addr,
	595	mii_data->val_in);
	596	}
	597	}
	598	EXPORT_SYMBOL(mdio_mii_ioctl);