ULITE_CONTROL
ULITE_CONTROL, port);
uart_out32(ULITE_CONTROL_IE, ULITE_CONTROL, port);
uart_out32(0, ULITE_CONTROL, port);
uart_in32(ULITE_CONTROL, port); /* dummy */
ret = uart_in32(ULITE_CONTROL, port);
uart_out32(ULITE_CONTROL_RST_TX, ULITE_CONTROL, port);
uart_out32(0, ULITE_CONTROL, port);
uart_out32(ULITE_CONTROL_IE, ULITE_CONTROL, port);