Message-ID: <20210220115303.GL1463@shell.armlinux.org.uk>
Date:   Sat, 20 Feb 2021 11:53:04 +0000
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Ivan Bornyakov <i.bornyakov@...rotek.ru>
Cc:     netdev@...r.kernel.org, system@...rotek.ru, andrew@...n.ch,
        hkallweit1@...il.com, davem@...emloft.net, kuba@...nel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: phy: add Marvell 88X2222 transceiver support

On Sat, Feb 20, 2021 at 12:46:23PM +0300, Ivan Bornyakov wrote:
> Add basic support for the Marvell 88X2222 multi-speed ethernet
> transceiver.
> 
> This PHY provides data transmission over fiber-optic as well as Twinax
> copper links. The 88X2222 supports 2 ports of 10GBase-R and 1000Base-X
> on the line-side interface. The host-side interface supports 4 ports of
> 10GBase-R, RXAUI, 1000Base-X and 2 ports of XAUI.
> 
> This driver, however, supports only XAUI on the host-side and
> 1000Base-X/10GBase-R on the line-side, for now. The SGMII is also
> supported over 1000Base-X. Interrupts are not supported.
> 
> Internal registers access compliant with the Clause 45 specification.
> 
> Signed-off-by: Ivan Bornyakov <i.bornyakov@...rotek.ru>
> ---
>  drivers/net/phy/Kconfig           |   6 +
>  drivers/net/phy/Makefile          |   1 +
>  drivers/net/phy/marvell-88x2222.c | 510 ++++++++++++++++++++++++++++++
>  include/linux/marvell_phy.h       |   1 +
>  4 files changed, 518 insertions(+)
>  create mode 100644 drivers/net/phy/marvell-88x2222.c
> 
> diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
> index 698bea312adc..a615b3660b05 100644
> --- a/drivers/net/phy/Kconfig
> +++ b/drivers/net/phy/Kconfig
> @@ -201,6 +201,12 @@ config MARVELL_10G_PHY
>  	help
>  	  Support for the Marvell Alaska MV88X3310 and compatible PHYs.
>  
> +config MARVELL_88X2222_PHY
> +	tristate "Marvell 88X2222 PHY"
> +	help
> +	  Support for the Marvell 88X2222 Dual-port Multi-speed Ethernet
> +	  Transceiver.
> +
>  config MICREL_PHY
>  	tristate "Micrel PHYs"
>  	help
> diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
> index a13e402074cf..de683e3abe63 100644
> --- a/drivers/net/phy/Makefile
> +++ b/drivers/net/phy/Makefile
> @@ -63,6 +63,7 @@ obj-$(CONFIG_LSI_ET1011C_PHY)	+= et1011c.o
>  obj-$(CONFIG_LXT_PHY)		+= lxt.o
>  obj-$(CONFIG_MARVELL_10G_PHY)	+= marvell10g.o
>  obj-$(CONFIG_MARVELL_PHY)	+= marvell.o
> +obj-$(CONFIG_MARVELL_88X2222_PHY)	+= marvell-88x2222.o
>  obj-$(CONFIG_MESON_GXL_PHY)	+= meson-gxl.o
>  obj-$(CONFIG_MICREL_KS8995MA)	+= spi_ks8995.o
>  obj-$(CONFIG_MICREL_PHY)	+= micrel.o
> diff --git a/drivers/net/phy/marvell-88x2222.c b/drivers/net/phy/marvell-88x2222.c
> new file mode 100644
> index 000000000000..5f1b6185e272
> --- /dev/null
> +++ b/drivers/net/phy/marvell-88x2222.c
> @@ -0,0 +1,510 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Marvell 88x2222 dual-port multi-speed ethernet transceiver.
> + *
> + * Supports:
> + *	XAUI on the host side.
> + *	1000Base-X or 10GBase-R on the line side.
> + */
> +#include <linux/module.h>
> +#include <linux/phy.h>
> +#include <linux/gpio.h>
> +#include <linux/delay.h>
> +#include <linux/mdio.h>
> +#include <linux/marvell_phy.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_gpio.h>
> +#include <linux/sfp.h>
> +#include <linux/netdevice.h>
> +
> +/* Port PCS Configuration */
> +#define	MV_PCS_CONFIG		0xF002
> +#define	MV_PCS_HOST_XAUI	0x73
> +#define	MV_PCS_LINE_10GBR	(0x71 << 8)
> +#define	MV_PCS_LINE_1GBX_AN	(0x7B << 8)
> +#define	MV_PCS_LINE_SGMII_AN	(0x7F << 8)
> +
> +/* Port Reset and Power Down */
> +#define	MV_PORT_RST	0xF003
> +#define	MV_LINE_RST_SW	BIT(15)
> +#define	MV_HOST_RST_SW	BIT(7)
> +#define	MV_PORT_RST_SW	(MV_LINE_RST_SW | MV_HOST_RST_SW)
> +
> +/* 10GBASE-R PCS Real Time Status Register */
> +#define	MV_10GBR_STAT_RT	0x8002
> +
> +/* 1000Base-X/SGMII Control Register */
> +#define	MV_1GBX_CTRL		(0x2000 + MII_BMCR)
> +
> +/* 1000BASE-X/SGMII Status Register */
> +#define	MV_1GBX_STAT		(0x2000 + MII_BMSR)
> +
> +/* 1000Base-X Auto-Negotiation Advertisement Register */
> +#define	MV_1GBX_ADVERTISE	(0x2000 + MII_ADVERTISE)
> +
> +/* 1000Base-X PHY Specific Status Register */
> +#define	MV_1GBX_PHY_STAT		0xA003
> +#define	MV_1GBX_PHY_STAT_AN_RESOLVED	BIT(11)
> +#define	MV_1GBX_PHY_STAT_DUPLEX		BIT(13)
> +#define	MV_1GBX_PHY_STAT_SPEED100	BIT(14)
> +#define	MV_1GBX_PHY_STAT_SPEED1000	BIT(15)
> +
> +struct mv2222_data {
> +	phy_interface_t line_interface;
> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
> +};
> +
> +/* SFI PMA transmit enable */
> +static int mv2222_tx_enable(struct phy_device *phydev)
> +{
> +	return phy_clear_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_TXDIS,
> +				  MDIO_PMD_TXDIS_GLOBAL);
> +}
> +
> +/* SFI PMA transmit disable */
> +static int mv2222_tx_disable(struct phy_device *phydev)
> +{
> +	return phy_set_bits_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_TXDIS,
> +				MDIO_PMD_TXDIS_GLOBAL);
> +}
> +
> +static int mv2222_soft_reset(struct phy_device *phydev)
> +{
> +	int val, ret;
> +
> +	ret = phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PORT_RST,
> +			    MV_PORT_RST_SW);
> +	if (ret < 0)
> +		return ret;
> +
> +	return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND2, MV_PORT_RST,
> +					 val, !(val & MV_PORT_RST_SW),
> +					 5000, 1000000, true);
> +}
> +
> +static int sfp_module_insert(void *_priv, const struct sfp_eeprom_id *id)

Please rename this function. We have a function named exactly the same
in the SFP layer, so if we have duplicate function names, it will make
parsing backtraces harder.

> +{
> +	struct phy_device *phydev = _priv;
> +	struct device *dev = &phydev->mdio.dev;
> +	struct mv2222_data *priv = phydev->priv;
> +	phy_interface_t sfp_interface;
> +
> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_supported) = { 0, };
> +
> +	sfp_parse_support(phydev->sfp_bus, id, sfp_supported);
> +	sfp_interface = sfp_select_interface(phydev->sfp_bus, sfp_supported);
> +
> +	dev_info(dev, "%s SFP module inserted", phy_modes(sfp_interface));

Kernel messages normally have a "\n" terminating them.

> +
> +	switch (sfp_interface) {
> +	case PHY_INTERFACE_MODE_10GBASER:
> +		phydev->speed = SPEED_10000;
> +		phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
> +			      MV_PCS_HOST_XAUI | MV_PCS_LINE_10GBR);
> +		break;
> +	case PHY_INTERFACE_MODE_1000BASEX:
> +		phydev->speed = SPEED_1000;
> +		phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
> +			      MV_PCS_HOST_XAUI | MV_PCS_LINE_1GBX_AN);
> +		break;
> +	case PHY_INTERFACE_MODE_SGMII:
> +		phydev->speed = SPEED_1000;
> +		phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
> +			      MV_PCS_HOST_XAUI | MV_PCS_LINE_SGMII_AN);
> +		phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
> +			       BMCR_SPEED1000 | BMCR_SPEED100, BMCR_SPEED1000);

Isn't this forcing 1000Mbit, but SGMII relies on AN for the slower
speeds.

> +		break;
> +	default:
> +		dev_err(dev, "Incompatible SFP module inserted\n");
> +
> +		return -EINVAL;
> +	}

I don't think you should set phydev->speed in this function - apart
from the rtnl lock, there is no other locking here, so this is fragile.

> +	linkmode_and(phydev->supported, priv->supported, sfp_supported);

I don't think this is a good idea; phylink does not expect the supported
mask to change, and I suspect _no_ network device expects it to change.
One of the things that network drivers and phylink does is to adjust the
supported mask for a PHY according to the capabilities of the network
device. For example, if they don't support pause modes, or something
else. Overriding it in this way has the possibility to re-introduce
modes that the network driver does not support.

> +	priv->line_interface = sfp_interface;
> +
> +	return mv2222_soft_reset(phydev);
> +}
> +
> +static void sfp_module_remove(void *_priv)

Please rename this function.

> +{
> +	struct phy_device *phydev = _priv;
> +	struct mv2222_data *priv = phydev->priv;
> +
> +	priv->line_interface = PHY_INTERFACE_MODE_NA;
> +	linkmode_copy(phydev->supported, priv->supported);
> +}
> +
> +static const struct sfp_upstream_ops sfp_phy_ops = {
> +	.module_insert = sfp_module_insert,
> +	.module_remove = sfp_module_remove,
> +	.attach = phy_sfp_attach,
> +	.detach = phy_sfp_detach,
> +};
> +
> +static int mv2222_config_init(struct phy_device *phydev)
> +{
> +	if (phydev->interface != PHY_INTERFACE_MODE_XAUI)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +/* switch line-side interface between 10GBase-R and 1GBase-X
> + * according to speed */
> +static void mv2222_update_interface(struct phy_device *phydev)
> +{
> +	struct mv2222_data *priv = phydev->priv;
> +
> +	if (phydev->speed == SPEED_10000 &&
> +	    priv->line_interface == PHY_INTERFACE_MODE_1000BASEX) {
> +		priv->line_interface = PHY_INTERFACE_MODE_10GBASER;
> +
> +		phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
> +			      MV_PCS_HOST_XAUI | MV_PCS_LINE_10GBR);
> +		mv2222_soft_reset(phydev);
> +	}
> +
> +	if (phydev->speed == SPEED_1000 &&
> +	    priv->line_interface == PHY_INTERFACE_MODE_10GBASER) {
> +		priv->line_interface = PHY_INTERFACE_MODE_1000BASEX;
> +
> +		phy_write_mmd(phydev, MDIO_MMD_VEND2, MV_PCS_CONFIG,
> +			      MV_PCS_HOST_XAUI | MV_PCS_LINE_1GBX_AN);
> +		mv2222_soft_reset(phydev);
> +	}

Wouldn't it be better to have a single function to set the line
interface, used by both this function and your sfp_module_insert
function? I'm thinking something like:

static int mv2222_set_line_interface(struct phy_device *phydev,
				     phy_interface_t line_interface)
{
...
}

and calling that from both these locations to configure the PHY for
10GBASE-R, 1000BASE-X and SGMII modes.

> +}
> +
> +/* Returns negative on error, 0 if link is down, 1 if link is up */
> +static int mv2222_read_status_10g(struct phy_device *phydev)
> +{
> +	int val, link = 0;
> +
> +	val = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1);
> +	if (val < 0)
> +		return val;
> +
> +	if (val & MDIO_STAT1_LSTATUS) {
> +		link = 1;
> +
> +		/* 10GBASE-R do not support auto-negotiation */
> +		phydev->autoneg = AUTONEG_DISABLE;
> +		phydev->speed = SPEED_10000;
> +		phydev->duplex = DUPLEX_FULL;
> +	}
> +
> +	return link;
> +}
> +
> +/* Returns negative on error, 0 if link is down, 1 if link is up */
> +static int mv2222_read_status_1g(struct phy_device *phydev)
> +{
> +	int val, link = 0;
> +
> +	val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT);
> +	if (val < 0)
> +		return val;
> +
> +	if (!(val & BMSR_LSTATUS) ||
> +	    (phydev->autoneg == AUTONEG_ENABLE &&
> +	     !(val & BMSR_ANEGCOMPLETE)))
> +		return 0;
> +
> +	link = 1;
> +
> +	val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_PHY_STAT);
> +	if (val < 0)
> +		return val;
> +
> +	if (val & MV_1GBX_PHY_STAT_AN_RESOLVED) {
> +		if (val & MV_1GBX_PHY_STAT_DUPLEX)
> +			phydev->duplex = DUPLEX_FULL;
> +		else
> +			phydev->duplex = DUPLEX_HALF;
> +
> +		if (val & MV_1GBX_PHY_STAT_SPEED1000)
> +			phydev->speed = SPEED_1000;
> +		else if (val & MV_1GBX_PHY_STAT_SPEED100)
> +			phydev->speed = SPEED_100;
> +		else
> +			phydev->speed = SPEED_10;
> +	} else {
> +		phydev->duplex = DUPLEX_UNKNOWN;
> +		phydev->speed = SPEED_UNKNOWN;
> +	}
> +
> +	return link;
> +}
> +
> +static int mv2222_read_status(struct phy_device *phydev)
> +{
> +	struct mv2222_data *priv = phydev->priv;
> +	int link;
> +
> +	if (priv->line_interface == PHY_INTERFACE_MODE_10GBASER)
> +		link = mv2222_read_status_10g(phydev);
> +	else
> +		link = mv2222_read_status_1g(phydev);
> +
> +	if (link < 0)
> +		return link;
> +
> +	phydev->link = link;
> +
> +	return 0;
> +}
> +
> +static int mv2222_disable_aneg(struct phy_device *phydev)
> +{
> +	return phy_clear_bits_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
> +				  BMCR_ANENABLE | BMCR_ANRESTART);
> +}
> +
> +static int mv2222_enable_aneg(struct phy_device *phydev)
> +{
> +	return phy_set_bits_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
> +				BMCR_ANENABLE | BMCR_RESET);
> +}
> +
> +static int mv2222_set_sgmii_speed(struct phy_device *phydev)
> +{
> +	switch (phydev->speed) {
> +	case SPEED_1000:
> +		if (!(linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
> +					phydev->supported) ||
> +		      linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
> +					phydev->supported)))
> +			return -EINVAL;
> +
> +		phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
> +			       BMCR_SPEED1000 | BMCR_SPEED100, BMCR_SPEED1000);
> +		break;
> +	case SPEED_100:
> +		if (!(linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
> +					phydev->supported) ||
> +		      linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
> +					phydev->supported)))
> +			return -EINVAL;
> +
> +		phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
> +			       BMCR_SPEED1000 | BMCR_SPEED100, BMCR_SPEED100);
> +		break;
> +	case SPEED_10:
> +		if (!(linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
> +					phydev->supported) ||
> +		      linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
> +					phydev->supported)))
> +			return -EINVAL;
> +
> +		phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_CTRL,
> +			       BMCR_SPEED1000 | BMCR_SPEED100, BMCR_SPEED10);
> +		break;
> +	default:
> +		break;
> +	}
> +
> +	return mv2222_soft_reset(phydev);
> +}
> +
> +static bool mv2222_is_10g_capable(struct phy_device *phydev)
> +{
> +	return (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
> +				  phydev->supported) ||
> +		linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
> +				  phydev->supported) ||
> +		linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT,
> +				  phydev->supported) ||
> +		linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT,
> +				  phydev->supported) ||
> +		linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT,
> +				  phydev->supported) ||
> +		linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT,
> +				  phydev->supported) ||
> +		linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT,
> +				  phydev->supported));
> +}
> +
> +static int mv2222_config_aneg(struct phy_device *phydev)
> +{
> +	struct mv2222_data *priv = phydev->priv;
> +	int ret, adv;
> +
> +	/* SFP is not present, do nothing */
> +	if (priv->line_interface == PHY_INTERFACE_MODE_NA)
> +		return 0;
> +
> +	if (phydev->autoneg == AUTONEG_DISABLE ||
> +	    phydev->speed == SPEED_10000) {
> +		if (phydev->speed == SPEED_10000 &&
> +		    !mv2222_is_10g_capable(phydev))
> +			return -EINVAL;
> +
> +		if (priv->line_interface == PHY_INTERFACE_MODE_SGMII) {
> +			ret = mv2222_set_sgmii_speed(phydev);
> +			if (ret < 0)
> +				return ret;
> +		} else {
> +			mv2222_update_interface(phydev);
> +		}
> +
> +		return mv2222_disable_aneg(phydev);
> +	}
> +
> +	/* Try 10G first */
> +	if (mv2222_is_10g_capable(phydev)) {
> +		phydev->speed = SPEED_10000;
> +		mv2222_update_interface(phydev);
> +
> +		ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_10GBR_STAT_RT);
> +		if (ret < 0)
> +			return ret;
> +
> +		if (ret & MDIO_STAT1_LSTATUS) {
> +			phydev->autoneg = AUTONEG_DISABLE;
> +
> +			return mv2222_disable_aneg(phydev);
> +		}
> +
> +		/* 10G link was not established, switch back to 1G
> +		 * and proceed with true autonegotiation */
> +		phydev->speed = SPEED_1000;
> +		mv2222_update_interface(phydev);

This doesn't look right. If the user specifies that they want 10G,
why should we switch back to 1G?

> +	}
> +
> +	adv = 0;
> +
> +	if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
> +			      phydev->supported))
> +		adv |= ADVERTISE_1000XFULL;
> +
> +	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
> +			      phydev->supported))
> +		adv |= ADVERTISE_1000XPAUSE;
> +
> +	if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
> +			      phydev->supported))
> +		adv |= ADVERTISE_1000XPSE_ASYM;
> +
> +	ret = phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_ADVERTISE,
> +			     ADVERTISE_1000XFULL |
> +			     ADVERTISE_1000XPAUSE | ADVERTISE_1000XPSE_ASYM,
> +			     adv);
> +	if (ret < 0)
> +		return ret;
> +
> +	return mv2222_enable_aneg(phydev);
> +}
> +
> +static int mv2222_aneg_done(struct phy_device *phydev)
> +{
> +	int ret;
> +
> +	if (mv2222_is_10g_capable(phydev)) {
> +		ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_STAT1);
> +		if (ret < 0)
> +			return ret;
> +
> +		if (ret & MDIO_STAT1_LSTATUS)
> +			return 1;
> +	}
> +
> +	ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_1GBX_STAT);
> +	if (ret < 0)
> +		return ret;
> +
> +	return (ret & BMSR_ANEGCOMPLETE);
> +}
> +
> +static int mv2222_resume(struct phy_device *phydev)
> +{
> +	return mv2222_tx_enable(phydev);
> +}
> +
> +static int mv2222_suspend(struct phy_device *phydev)
> +{
> +	return mv2222_tx_disable(phydev);
> +}
> +
> +static int mv2222_get_features(struct phy_device *phydev)
> +{
> +	/* All supported linkmodes are set at probe
> +	 * and adjusted at SFP module insert */
> +
> +	return 0;
> +}
> +
> +static int mv2222_probe(struct phy_device *phydev)
> +{
> +	struct device *dev = &phydev->mdio.dev;
> +	struct mv2222_data *priv = NULL;
> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
> +
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_TP_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseCR_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT, supported);
> +	linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, supported);
> +
> +	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +	if (!priv)
> +		return -ENOMEM;
> +
> +	linkmode_copy(phydev->supported, supported);
> +	linkmode_copy(priv->supported, supported);
> +	priv->line_interface = PHY_INTERFACE_MODE_NA;
> +	phydev->priv = priv;
> +
> +	return phy_sfp_probe(phydev, &sfp_phy_ops);
> +}
> +
> +static void mv2222_remove(struct phy_device *phydev)
> +{
> +	struct device *dev = &phydev->mdio.dev;
> +	struct mv2222_data *priv = phydev->priv;
> +
> +	if (priv)
> +		devm_kfree(dev, priv);
> +}
> +
> +static struct phy_driver mv2222_drivers[] = {
> +	{
> +		.phy_id = MARVELL_PHY_ID_88X2222,
> +		.phy_id_mask = MARVELL_PHY_ID_MASK,
> +		.name = "Marvell 88X2222",
> +		.get_features = mv2222_get_features,
> +		.soft_reset = mv2222_soft_reset,
> +		.config_init = mv2222_config_init,
> +		.config_aneg = mv2222_config_aneg,
> +		.aneg_done = mv2222_aneg_done,
> +		.probe = mv2222_probe,
> +		.remove = mv2222_remove,
> +		.suspend = mv2222_suspend,
> +		.resume = mv2222_resume,
> +		.read_status = mv2222_read_status,
> +	},
> +};
> +module_phy_driver(mv2222_drivers);
> +
> +static struct mdio_device_id __maybe_unused mv2222_tbl[] = {
> +	{ MARVELL_PHY_ID_88X2222, MARVELL_PHY_ID_MASK },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(mdio, mv2222_tbl);
> +
> +MODULE_DESCRIPTION("Marvell 88x2222 ethernet transceiver driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/marvell_phy.h b/include/linux/marvell_phy.h
> index 52b1610eae68..274abd5fbac3 100644
> --- a/include/linux/marvell_phy.h
> +++ b/include/linux/marvell_phy.h
> @@ -24,6 +24,7 @@
>  #define MARVELL_PHY_ID_88E3016		0x01410e60
>  #define MARVELL_PHY_ID_88X3310		0x002b09a0
>  #define MARVELL_PHY_ID_88E2110		0x002b09b0
> +#define MARVELL_PHY_ID_88X2222		0x01410f10
>  
>  /* Marvel 88E1111 in Finisar SFP module with modified PHY ID */
>  #define MARVELL_PHY_ID_88E1111_FINISAR	0x01ff0cc0
> -- 
> 2.20.1
> 
> 
> 

-- 
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