[alsa-devel] user space control app driver interface for sound soc

If I want to build an audio user space app to perform things like transferring large blocks of data to the sound soc codec using I2C, what is the best kernel driver interface to use for this purpose? Add file interface (read/write/ioctl) in the sound soc codec driver, or does ALSA already have this? The soc codec driver needs to co-exist with this mechanism.

Thanks,

Peter