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Commit 045925e3 authored by Heiner Kallweit's avatar Heiner Kallweit Committed by David S. Miller
Browse files

net: phy: add genphy_read_abilities 



Similar to genphy_c45_pma_read_abilities() add a function to dynamically
detect the abilities of a Clause 22 PHY. This is mainly copied from
genphy_config_init().

Signed-off-by: default avatarHeiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6d670497

drivers/net/phy/phy_device.c

+48 −0
Original line number Diff line number Diff line
@@ -1880,6 +1880,54 @@ int genphy_config_init(struct phy_device *phydev) 
}

EXPORT_SYMBOL(genphy_config_init);



/**

 * genphy_read_abilities - read PHY abilities from Clause 22 registers

 * @phydev: target phy_device struct

 *

 * Description: Reads the PHY's abilities and populates

 * phydev->supported accordingly.

 *

 * Returns: 0 on success, < 0 on failure

 */

int genphy_read_abilities(struct phy_device *phydev)

{

	int val;



	linkmode_set_bit_array(phy_basic_ports_array,

			       ARRAY_SIZE(phy_basic_ports_array),

			       phydev->supported);



	val = phy_read(phydev, MII_BMSR);

	if (val < 0)

		return val;



	linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported,

			 val & BMSR_ANEGCAPABLE);



	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, phydev->supported,

			 val & BMSR_100FULL);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, phydev->supported,

			 val & BMSR_100HALF);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, phydev->supported,

			 val & BMSR_10FULL);

	linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, phydev->supported,

			 val & BMSR_10HALF);



	if (val & BMSR_ESTATEN) {

		val = phy_read(phydev, MII_ESTATUS);

		if (val < 0)

			return val;



		linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,

				 phydev->supported, val & ESTATUS_1000_TFULL);

		linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,

				 phydev->supported, val & ESTATUS_1000_THALF);

	}



	return 0;

}

EXPORT_SYMBOL(genphy_read_abilities);



/* This is used for the phy device which doesn't support the MMD extended

 * register access, but it does have side effect when we are trying to access

 * the MMD register via indirect method.

include/linux/phy.h

+1 −0
Original line number Diff line number Diff line
@@ -1075,6 +1075,7 @@ void phy_attached_info(struct phy_device *phydev); 


/* Clause 22 PHY */

int genphy_config_init(struct phy_device *phydev);

int genphy_read_abilities(struct phy_device *phydev);

int genphy_setup_forced(struct phy_device *phydev);

int genphy_restart_aneg(struct phy_device *phydev);

int genphy_config_eee_advert(struct phy_device *phydev);