Qubit control is one of the main challenges of building a scalable Quantum computer with superconducting qubits. Current technologies are based on room temperature microwave generators. Scaling microwave control to millions of qubits is more than an engineering challenge due to the excessive heat delivered to the cryostat and the hardware cost. This talk will introduce the basics of microwave qubit control and some of its issues. Then we will discuss the theory and experimental realization of a control technology using only superconducting (cold) digital (cheap) circuits, which opens a path towards scalable qubit control.