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net: phy: add helper to convert negotiation result to phy settings

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Add a helper to convert the result of the autonegotiation advertisment
into the PHYs speed and duplex settings.  If the result is full duplex,
also extract the pause mode settings from the link partner advertisment.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Russell King 2017-12-29 12:46:38 +00:00 committed by David S. Miller
parent 36c4449a94
commit 8c5e850c0c
2 changed files with 45 additions and 0 deletions
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43
drivers/net/phy/phy-core.c
View file

@ -189,6 +189,49 @@ size_t phy_speeds(unsigned int *speeds, size_t size,
return count;
}
/**
* phy_resolve_aneg_linkmode - resolve the advertisments into phy settings
* @phydev: The phy_device struct
*
* Resolve our and the link partner advertisments into their corresponding
* speed and duplex. If full duplex was negotiated, extract the pause mode
* from the link partner mask.
*/
void phy_resolve_aneg_linkmode(struct phy_device *phydev)
{
u32 common = phydev->lp_advertising & phydev->advertising;
if (common & ADVERTISED_10000baseT_Full) {
phydev->speed = SPEED_10000;
phydev->duplex = DUPLEX_FULL;
} else if (common & ADVERTISED_1000baseT_Full) {
phydev->speed = SPEED_1000;
phydev->duplex = DUPLEX_FULL;
} else if (common & ADVERTISED_1000baseT_Half) {
phydev->speed = SPEED_1000;
phydev->duplex = DUPLEX_HALF;
} else if (common & ADVERTISED_100baseT_Full) {
phydev->speed = SPEED_100;
phydev->duplex = DUPLEX_FULL;
} else if (common & ADVERTISED_100baseT_Half) {
phydev->speed = SPEED_100;
phydev->duplex = DUPLEX_HALF;
} else if (common & ADVERTISED_10baseT_Full) {
phydev->speed = SPEED_10;
phydev->duplex = DUPLEX_FULL;
} else if (common & ADVERTISED_10baseT_Half) {
phydev->speed = SPEED_10;
phydev->duplex = DUPLEX_HALF;
}
if (phydev->duplex == DUPLEX_FULL) {
phydev->pause = !!(phydev->lp_advertising & ADVERTISED_Pause);
phydev->asym_pause = !!(phydev->lp_advertising &
ADVERTISED_Asym_Pause);
}
}
EXPORT_SYMBOL_GPL(phy_resolve_aneg_linkmode);
static void mmd_phy_indirect(struct mii_bus *bus, int phy_addr, int devad,
u16 regnum)
{

2
include/linux/phy.h
View file

@ -690,6 +690,8 @@ phy_lookup_setting(int speed, int duplex, const unsigned long *mask,
size_t phy_speeds(unsigned int *speeds, size_t size,
unsigned long *mask, size_t maxbit);
void phy_resolve_aneg_linkmode(struct phy_device *phydev);
/**
* phy_read_mmd - Convenience function for reading a register
* from an MMD on a given PHY.