[mirror_ubuntu-bionic-kernel.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>

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);

/**
 * 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);

			/* 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);

/**
 * 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
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
30767636 NR	17	MODULE_DESCRIPTION("Generic support for MDIO-compatible transceivers");
	18	MODULE_AUTHOR("Copyright 2006-2009 Solarflare Communications Inc.");
	19	MODULE_LICENSE("GPL");
	20
1b1c2e95 BH	21	/**
	22	* mdio45_probe - probe for an MDIO (clause 45) device
	23	* @mdio: MDIO interface
	24	* @prtad: Expected PHY address
	25	*
	26	* This sets @prtad and @mmds in the MDIO interface if successful.
	27	* Returns 0 on success, negative on error.
	28	*/
	29	int mdio45_probe(struct mdio_if_info *mdio, int prtad)
	30	{
	31	int mmd, stat2, devs1, devs2;
	32
	33	/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
	34	* XS or DTE XS; give up if none is present. */
	35	for (mmd = 1; mmd <= 5; mmd++) {
	36	/* Is this MMD present? */
	37	stat2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_STAT2);
	38	if (stat2 < 0 \|\|
	39	(stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
	40	continue;
	41
	42	/* It should tell us about all the other MMDs */
	43	devs1 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS1);
	44	devs2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS2);
	45	if (devs1 < 0 \|\| devs2 < 0)
	46	continue;
	47
	48	mdio->prtad = prtad;
	49	mdio->mmds = devs1 \| (devs2 << 16);
	50	return 0;
	51	}
	52
	53	return -ENODEV;
	54	}
	55	EXPORT_SYMBOL(mdio45_probe);
	56
	57	/**
	58	* mdio_set_flag - set or clear flag in an MDIO register
	59	* @mdio: MDIO interface
	60	* @prtad: PHY address
	61	* @devad: MMD address
	62	* @addr: Register address
	63	* @mask: Mask for flag (single bit set)
	64	* @sense: New value of flag
	65	*
	66	* This debounces changes: it does not write the register if the flag
	67	* already has the proper value. Returns 0 on success, negative on error.
	68	*/
	69	int mdio_set_flag(const struct mdio_if_info *mdio,
	70	int prtad, int devad, u16 addr, int mask,
	71	bool sense)
	72	{
	73	int old_val = mdio->mdio_read(mdio->dev, prtad, devad, addr);
	74	int new_val;
	75
	76	if (old_val < 0)
	77	return old_val;
	78	if (sense)
	79	new_val = old_val \| mask;
	80	else
	81	new_val = old_val & ~mask;
	82	if (old_val == new_val)
	83	return 0;
	84	return mdio->mdio_write(mdio->dev, prtad, devad, addr, new_val);
85	}
86	EXPORT_SYMBOL(mdio_set_flag);
87
88	/**
89	* mdio_link_ok - is link status up/OK
90	* @mdio: MDIO interface
91	* @mmd_mask: Mask for MMDs to check
92	*
93	* Returns 1 if the PHY reports link status up/OK, 0 otherwise.
94	* @mmd_mask is normally @mdio->mmds, but if loopback is enabled
95	* the MMDs being bypassed should be excluded from the mask.
96	*/
97	int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask)
98	{
99	int devad, reg;
100
101	if (!mmd_mask) {
102	/* Use absence of XGMII faults in lieu of link state */
103	reg = mdio->mdio_read(mdio->dev, mdio->prtad,
104	MDIO_MMD_PHYXS, MDIO_STAT2);
105	return reg >= 0 && !(reg & MDIO_STAT2_RXFAULT);
106	}
107
108	for (devad = 0; mmd_mask; devad++) {
109	if (mmd_mask & (1 << devad)) {
110	mmd_mask &= ~(1 << devad);
111
771046d7	112	/* Reset the latched status and fault flags */
1b1c2e95 BH	113	mdio->mdio_read(mdio->dev, mdio->prtad,
1b1c2e95 BH	114	devad, MDIO_STAT1);
771046d7 BH	115	if (devad == MDIO_MMD_PMAPMD \|\| devad == MDIO_MMD_PCS \|\|
	116	devad == MDIO_MMD_PHYXS \|\| devad == MDIO_MMD_DTEXS)
	117	mdio->mdio_read(mdio->dev, mdio->prtad,
	118	devad, MDIO_STAT2);
	119
	120	/* Check the current status and fault flags */
1b1c2e95 BH	121	reg = mdio->mdio_read(mdio->dev, mdio->prtad,
1b1c2e95 BH	122	devad, MDIO_STAT1);
771046d7 BH	123	if (reg < 0 \|\|
	124	(reg & (MDIO_STAT1_FAULT \| MDIO_STAT1_LSTATUS)) !=
	125	MDIO_STAT1_LSTATUS)
1b1c2e95 BH	126	return false;
	127	}
	128	}
	129
	130	return true;
	131	}
	132	EXPORT_SYMBOL(mdio45_links_ok);
	133
	134	/**
	135	* mdio45_nway_restart - restart auto-negotiation for this interface
	136	* @mdio: MDIO interface
	137	*
	138	* Returns 0 on success, negative on error.
	139	*/
	140	int mdio45_nway_restart(const struct mdio_if_info *mdio)
	141	{
	142	if (!(mdio->mmds & MDIO_DEVS_AN))
	143	return -EOPNOTSUPP;
	144
	145	mdio_set_flag(mdio, mdio->prtad, MDIO_MMD_AN, MDIO_CTRL1,
	146	MDIO_AN_CTRL1_RESTART, true);
	147	return 0;
	148	}
	149	EXPORT_SYMBOL(mdio45_nway_restart);
	150
	151	static u32 mdio45_get_an(const struct mdio_if_info *mdio, u16 addr)
	152	{
	153	u32 result = 0;
	154	int reg;
	155
	156	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN, addr);
	157	if (reg & ADVERTISE_10HALF)
	158	result \|= ADVERTISED_10baseT_Half;
	159	if (reg & ADVERTISE_10FULL)
	160	result \|= ADVERTISED_10baseT_Full;
	161	if (reg & ADVERTISE_100HALF)
	162	result \|= ADVERTISED_100baseT_Half;
	163	if (reg & ADVERTISE_100FULL)
	164	result \|= ADVERTISED_100baseT_Full;
27fbc7db BH	165	if (reg & ADVERTISE_PAUSE_CAP)
	166	result \|= ADVERTISED_Pause;
	167	if (reg & ADVERTISE_PAUSE_ASYM)
	168	result \|= ADVERTISED_Asym_Pause;
1b1c2e95 BH	169	return result;
	170	}
	171
	172	/**
	173	* mdio45_ethtool_gset_npage - get settings for ETHTOOL_GSET
	174	* @mdio: MDIO interface
	175	* @ecmd: Ethtool request structure
	176	* @npage_adv: Modes currently advertised on next pages
	177	* @npage_lpa: Modes advertised by link partner on next pages
	178	*
8ae6daca DD	179	* The @ecmd parameter is expected to have been cleared before calling
	180	* mdio45_ethtool_gset_npage().
	181	*
1b1c2e95 BH	182	* Since the CSRs for auto-negotiation using next pages are not fully
	183	* standardised, this function does not attempt to decode them. The
	184	* caller must pass them in.
	185	*/
	186	void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
	187	struct ethtool_cmd *ecmd,
	188	u32 npage_adv, u32 npage_lpa)
	189	{
	190	int reg;
70739497	191	u32 speed;
1b1c2e95	192
9c4df53b BH	193	BUILD_BUG_ON(MDIO_SUPPORTS_C22 != ETH_MDIO_SUPPORTS_C22);
	194	BUILD_BUG_ON(MDIO_SUPPORTS_C45 != ETH_MDIO_SUPPORTS_C45);
	195
1b1c2e95 BH	196	ecmd->transceiver = XCVR_INTERNAL;
1b1c2e95 BH	197	ecmd->phy_address = mdio->prtad;
0c09c1a4 BH	198	ecmd->mdio_support =
0c09c1a4 BH	199	mdio->mode_support & (MDIO_SUPPORTS_C45 \| MDIO_SUPPORTS_C22);
1b1c2e95 BH	200
	201	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	202	MDIO_CTRL2);
	203	switch (reg & MDIO_PMA_CTRL2_TYPE) {
	204	case MDIO_PMA_CTRL2_10GBT:
	205	case MDIO_PMA_CTRL2_1000BT:
	206	case MDIO_PMA_CTRL2_100BTX:
	207	case MDIO_PMA_CTRL2_10BT:
	208	ecmd->port = PORT_TP;
	209	ecmd->supported = SUPPORTED_TP;
	210	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	211	MDIO_SPEED);
	212	if (reg & MDIO_SPEED_10G)
	213	ecmd->supported \|= SUPPORTED_10000baseT_Full;
	214	if (reg & MDIO_PMA_SPEED_1000)
	215	ecmd->supported \|= (SUPPORTED_1000baseT_Full \|
	216	SUPPORTED_1000baseT_Half);
	217	if (reg & MDIO_PMA_SPEED_100)
	218	ecmd->supported \|= (SUPPORTED_100baseT_Full \|
	219	SUPPORTED_100baseT_Half);
	220	if (reg & MDIO_PMA_SPEED_10)
	221	ecmd->supported \|= (SUPPORTED_10baseT_Full \|
	222	SUPPORTED_10baseT_Half);
	223	ecmd->advertising = ADVERTISED_TP;
	224	break;
	225
	226	case MDIO_PMA_CTRL2_10GBCX4:
894b19a6 BH	227	ecmd->port = PORT_OTHER;
	228	ecmd->supported = 0;
	229	ecmd->advertising = 0;
	230	break;
	231
1b1c2e95 BH	232	case MDIO_PMA_CTRL2_10GBKX4:
	233	case MDIO_PMA_CTRL2_10GBKR:
	234	case MDIO_PMA_CTRL2_1000BKX:
	235	ecmd->port = PORT_OTHER;
894b19a6 BH	236	ecmd->supported = SUPPORTED_Backplane;
	237	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	238	MDIO_PMA_EXTABLE);
	239	if (reg & MDIO_PMA_EXTABLE_10GBKX4)
	240	ecmd->supported \|= SUPPORTED_10000baseKX4_Full;
	241	if (reg & MDIO_PMA_EXTABLE_10GBKR)
	242	ecmd->supported \|= SUPPORTED_10000baseKR_Full;
	243	if (reg & MDIO_PMA_EXTABLE_1000BKX)
	244	ecmd->supported \|= SUPPORTED_1000baseKX_Full;
	245	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	246	MDIO_PMA_10GBR_FECABLE);
	247	if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
	248	ecmd->supported \|= SUPPORTED_10000baseR_FEC;
	249	ecmd->advertising = ADVERTISED_Backplane;
1b1c2e95 BH	250	break;
	251
	252	/* All the other defined modes are flavours of optical */
	253	default:
	254	ecmd->port = PORT_FIBRE;
	255	ecmd->supported = SUPPORTED_FIBRE;
	256	ecmd->advertising = ADVERTISED_FIBRE;
	257	break;
	258	}
	259
	260	if (mdio->mmds & MDIO_DEVS_AN) {
	261	ecmd->supported \|= SUPPORTED_Autoneg;
	262	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
	263	MDIO_CTRL1);
	264	if (reg & MDIO_AN_CTRL1_ENABLE) {
	265	ecmd->autoneg = AUTONEG_ENABLE;
	266	ecmd->advertising \|=
	267	ADVERTISED_Autoneg \|
	268	mdio45_get_an(mdio, MDIO_AN_ADVERTISE) \|
	269	npage_adv;
	270	} else {
	271	ecmd->autoneg = AUTONEG_DISABLE;
	272	}
	273	} else {
	274	ecmd->autoneg = AUTONEG_DISABLE;
	275	}
	276
	277	if (ecmd->autoneg) {
	278	u32 modes = 0;
0c09c1a4 BH	279	int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
0c09c1a4 BH	280	MDIO_MMD_AN, MDIO_STAT1);
1b1c2e95 BH	281
	282	/* If AN is complete and successful, report best common
	283	* mode, otherwise report best advertised mode. */
0c09c1a4 BH	284	if (an_stat & MDIO_AN_STAT1_COMPLETE) {
	285	ecmd->lp_advertising =
	286	mdio45_get_an(mdio, MDIO_AN_LPA) \| npage_lpa;
	287	if (an_stat & MDIO_AN_STAT1_LPABLE)
	288	ecmd->lp_advertising \|= ADVERTISED_Autoneg;
	289	modes = ecmd->advertising & ecmd->lp_advertising;
	290	}
	291	if ((modes & ~ADVERTISED_Autoneg) == 0)
1b1c2e95 BH	292	modes = ecmd->advertising;
1b1c2e95 BH	293
894b19a6 BH	294	if (modes & (ADVERTISED_10000baseT_Full \|
	295	ADVERTISED_10000baseKX4_Full \|
	296	ADVERTISED_10000baseKR_Full)) {
70739497	297	speed = SPEED_10000;
1b1c2e95 BH	298	ecmd->duplex = DUPLEX_FULL;
1b1c2e95 BH	299	} else if (modes & (ADVERTISED_1000baseT_Full \|
894b19a6 BH	300	ADVERTISED_1000baseT_Half \|
894b19a6 BH	301	ADVERTISED_1000baseKX_Full)) {
70739497	302	speed = SPEED_1000;
894b19a6	303	ecmd->duplex = !(modes & ADVERTISED_1000baseT_Half);
1b1c2e95 BH	304	} else if (modes & (ADVERTISED_100baseT_Full \|
1b1c2e95 BH	305	ADVERTISED_100baseT_Half)) {
70739497	306	speed = SPEED_100;
1b1c2e95 BH	307	ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
1b1c2e95 BH	308	} else {
70739497	309	speed = SPEED_10;
1b1c2e95 BH	310	ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
	311	}
	312	} else {
	313	/* Report forced settings */
	314	reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	315	MDIO_CTRL1);
70739497 DD	316	speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1)
70739497 DD	317	* ((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
1b1c2e95	318	ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX \|\|
70739497	319	speed == SPEED_10000);
1b1c2e95	320	}
d005ba6c	321
70739497 DD	322	ethtool_cmd_speed_set(ecmd, speed);
70739497 DD	323
d005ba6c	324	/* 10GBASE-T MDI/MDI-X */
70739497 DD	325	if (ecmd->port == PORT_TP
70739497 DD	326	&& (ethtool_cmd_speed(ecmd) == SPEED_10000)) {
d005ba6c BH	327	switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
	328	MDIO_PMA_10GBT_SWAPPOL)) {
	329	case MDIO_PMA_10GBT_SWAPPOL_ABNX \| MDIO_PMA_10GBT_SWAPPOL_CDNX:
	330	ecmd->eth_tp_mdix = ETH_TP_MDI;
	331	break;
	332	case 0:
	333	ecmd->eth_tp_mdix = ETH_TP_MDI_X;
	334	break;
	335	default:
	336	/* It's complicated... */
	337	ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
	338	break;
	339	}
	340	}
1b1c2e95 BH	341	}
	342	EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
	343
	344	/**
	345	* mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
	346	* @mdio: MDIO interface
	347	* @mii_data: MII ioctl data structure
	348	* @cmd: MII ioctl command
	349	*
	350	* Returns 0 on success, negative on error.
	351	*/
	352	int mdio_mii_ioctl(const struct mdio_if_info *mdio,
	353	struct mii_ioctl_data *mii_data, int cmd)
	354	{
	355	int prtad, devad;
	356	u16 addr = mii_data->reg_num;
	357
	358	/* Validate/convert cmd to one of SIOC{G,S}MIIREG */
	359	switch (cmd) {
	360	case SIOCGMIIPHY:
	361	if (mdio->prtad == MDIO_PRTAD_NONE)
	362	return -EOPNOTSUPP;
	363	mii_data->phy_id = mdio->prtad;
	364	cmd = SIOCGMIIREG;
	365	break;
	366	case SIOCGMIIREG:
1b1c2e95	367	case SIOCSMIIREG:
1b1c2e95 BH	368	break;
	369	default:
	370	return -EOPNOTSUPP;
	371	}
	372
	373	/* Validate/convert phy_id */
	374	if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
	375	mdio_phy_id_is_c45(mii_data->phy_id)) {
	376	prtad = mdio_phy_id_prtad(mii_data->phy_id);
	377	devad = mdio_phy_id_devad(mii_data->phy_id);
	378	} else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
	379	mii_data->phy_id < 0x20) {
	380	prtad = mii_data->phy_id;
	381	devad = MDIO_DEVAD_NONE;
	382	addr &= 0x1f;
	383	} else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
	384	mdio->prtad != MDIO_PRTAD_NONE &&
	385	mii_data->phy_id == mdio->prtad) {
	386	/* Remap commonly-used MII registers. */
	387	prtad = mdio->prtad;
	388	switch (addr) {
	389	case MII_BMCR:
	390	case MII_BMSR:
	391	case MII_PHYSID1:
	392	case MII_PHYSID2:
	393	devad = __ffs(mdio->mmds);
	394	break;
	395	case MII_ADVERTISE:
	396	case MII_LPA:
	397	if (!(mdio->mmds & MDIO_DEVS_AN))
	398	return -EINVAL;
	399	devad = MDIO_MMD_AN;
	400	if (addr == MII_ADVERTISE)
	401	addr = MDIO_AN_ADVERTISE;
	402	else
	403	addr = MDIO_AN_LPA;
	404	break;
	405	default:
	406	return -EINVAL;
	407	}
	408	} else {
	409	return -EINVAL;
	410	}
	411
	412	if (cmd == SIOCGMIIREG) {
	413	int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
	414	if (rc < 0)
	415	return rc;
	416	mii_data->val_out = rc;
	417	return 0;
	418	} else {
	419	return mdio->mdio_write(mdio->dev, prtad, devad, addr,
	420	mii_data->val_in);
	421	}
	422	}
	423	EXPORT_SYMBOL(mdio_mii_ioctl);