summaryrefslogtreecommitdiff
path: root/include/linux/mii.h
diff options
context:
space:
mode:
authorRussell King (Oracle) <rmk+kernel@armlinux.org.uk>2022-06-18 11:28:32 +0100
committerDavid S. Miller <davem@davemloft.net>2022-06-19 10:38:26 +0100
commitbdb6cfe7512f7a214815a3092f0be50963dcacbc (patch)
tree07ad1ed99799407d4173fee0d6e4349fd6d8efac /include/linux/mii.h
parent5d1d527cd905752c6486421eeb27592849da17ab (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> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/mii.h')
-rw-r--r--include/linux/mii.h35
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__ */