Since the interview was through employee referral, the project manager arranged the interview.
There was one telephonic round in which I had to explain about my current project and some questions related to device drivers.
Subsequently, I was called for a face to face interview at Intel, Bangalore. This was a marathon with 6 interviewers coming in one after the other for a total of 6 hours. One focused on behavioural aspects and the rest were all technical. There were C questions (my preparation of having a look at the top 50 C questions in stackoverflow was quite useful). There were some questions on computer architecture and some on hardware aspects of device level communication protocols. Most interviewers based their questions around my project.
Overall, I felt that this is how any company should conduct an interview if it is has to avoid dealing with bad candidates later. A few weeks later, the HR called and asked some details about my education and employment history.