+SR_PRIV int icstation_usbrelay_identify(struct sr_serial_dev_inst *serial,
+ uint8_t *id);
+SR_PRIV int icstation_usbrelay_start(const struct sr_dev_inst *sdi);
+SR_PRIV int icstation_usbrelay_switch_cg(const struct sr_dev_inst *sdi,
+ const struct sr_channel_group *cg, gboolean on);