Commit bdb6cfe7 authored by Russell King (Oracle)'s avatar Russell King (Oracle) Committed by David S. Miller
Browse files

net: mii: add mii_bmcr_encode_fixed() 



Add a function to encode a fixed speed/duplex to a BMCR value.

Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5d1d527c

include/linux/mii.h

+35 −0
Original line number Diff line number Diff line
@@ -545,4 +545,39 @@ static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv) 
	return cap;

}



/**

 * mii_bmcr_encode_fixed - encode fixed speed/duplex settings to a BMCR value

 * @speed: a SPEED_* value

 * @duplex: a DUPLEX_* value

 *

 * Encode the speed and duplex to a BMCR value. 2500, 1000, 100 and 10 Mbps are

 * supported. 2500Mbps is encoded to 1000Mbps. Other speeds are encoded as 10

 * Mbps. Unknown duplex values are encoded to half-duplex.

 */

static inline u16 mii_bmcr_encode_fixed(int speed, int duplex)

{

	u16 bmcr;



	switch (speed) {

	case SPEED_2500:

	case SPEED_1000:

		bmcr = BMCR_SPEED1000;

		break;



	case SPEED_100:

		bmcr = BMCR_SPEED100;

		break;



	case SPEED_10:

	default:

		bmcr = BMCR_SPEED10;

		break;

	}



	if (duplex == DUPLEX_FULL)

		bmcr |= BMCR_FULLDPLX;



	return bmcr;

}



#endif /* __LINUX_MII_H__ */