Xilinx AXI Ethernet

http://lxr.free-electrons.com/source/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
http://lxr.free-electrons.com/source/drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c#L20


Half-Duplex Mode: When this bit is 1, the transmitter operates in
half-duplex mode. When this bit is 0, the transmitter operates in
full-duplex mode. Only full-duplex is supported so this bit should
always be set to 0.

There is basically difference between Marvell 88E1111S and 88E1011S. But, lanphy.c has 88E1011S settings for 88E1111S. Refer to the following:
https://github.com/Xilinx/u-boot-xlnx/blob/master/drivers/net/phy/marvell.c

88E1111S  Vs 88E1116R
http://svn.dd-wrt.com/browser/src/linux/universal/linux-3.12/drivers/net/phy/marvell.c?rev=22733