struct dsp_features {
int hfc_id; /* unique id to identify the chip (or -1) */
int hfc_dtmf; /* set if HFCmulti card supports dtmf */
+ int hfc_conf; /* set if HFCmulti card supports conferences */
int hfc_loops; /* set if card supports tone loops */
int hfc_echocanhw; /* set if card supports echocancelation*/
int pcm_id; /* unique id to identify the pcm bus (or -1) */