Here are the data structures with brief descriptions:

Ccmd
Ccmd_state
Ccommand
Ccontroller_state
Cdemod_state
Cdongle_info_t
Cdongle_state
Ce4k_pll_params
Ce4k_state
Cgain_comb
Cllist
Coption
Coutput_state
Cpll_settings
Cr82xx_config
Cr82xx_freq_range
Cr82xx_priv
Creg_field
Creg_field_ops
Crtlsdr_config
Crtlsdr_dev
Crtlsdr_dongle
Crtlsdr_tuner_iface
Cstrbuf
Ctuning_state