Credit is available on input services across goods & services since introduction of CENVAT Credit Rules, 2004. But where you are providing taxable as well as exempted services, Rule 6 of the above mentioned Rules would be applicable & credit would be availabe accordingly.
But in above case also, full credit of Specified Services would be applicable.
"6 (5) Notwithstanding anything contained in sub-rules (1), (2) and (3), credit of the whole of service tax paid on taxable service as specified in sub-clause (g), (p), (q), (r), (v), (w), (za), (zm), (zp), (zy), (zzd), (zzg), (zzh), (zzi), (zzk), (zzq) and (zzr) of clause (105) of section 65 of the Finance Act shall be allowed unless such service is used exclusively in or in relation to the manufacture of exempted goods or providing exempted services."