Using LAN91C111 and LWIP in 16-bit mode?

I've found to make the LAN91c111 really work as a 16 bit device

on the Nios2 development board, one has to modify the file "class.ptf"

in the altera_avalon_lan91c111 component folder.

When the 'LAN91C111 MAC/PHY On Daughtercard' option is chosen then

specifically these sections matter the most:

$SPW/PORT byteenablen/width = "2";

$SPW/PORT address/width = "15";

$SPW/PORT data/width = "16";

$SBI/Data_Width = "16";

$SBI/Address_Width = "15";

$CONSTANTS/CONSTANT LAN91C111_REGISTERS_OFFSET/value = "0x0300";

$CONSTANTS/CONSTANT LAN91C111_DATA_BUS_WIDTH/value = "16";

After that the posted driver works great.