diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-06-18 10:14:27 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-06-18 10:40:06 +0100 |
| commit | f08a328f1cae612408b089cf0072de8d651e73a1 (patch) | |
| tree | ded6b7e55f208e9db103a9a037a61f6897ef6d78 | |
| parent | d483f3999f2d774ab1fdaae4a68ac00bff073aee (diff) | |
net: mii: add mii_bmcr_encode_fixed()
Add a function to encode a fixed speed/duplex to a BMCR value.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | include/linux/mii.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/mii.h b/include/linux/mii.h index 5ee13083cec7..d5a959ce4877 100644 --- a/include/linux/mii.h +++ b/include/linux/mii.h @@ -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__ */ |