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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: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2019-03-27 21:58:44 +01:00 committed by David S. Miller
parent 6d670497e0
commit 045925e3fe
2 changed files with 49 additions and 0 deletions
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48
drivers/net/phy/phy_device.c
View File

@ -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.

1
include/linux/phy.h
View File

@ -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);