SLI4_REG_SLIPORT_CONTROL
sli_reg_write(sli4, SLI4_REG_SLIPORT_CONTROL, endian | SLI4_SLIPORT_CONTROL_IP);
sli_reg_write(sli4, SLI4_REG_SLIPORT_CONTROL, SLI4_SLIPORT_CONTROL_FDD | SLI4_SLIPORT_CONTROL_IP);