+struct sigma_state {
+ enum {
+ SIGMA_UNINITIALIZED = 0,
+ SIGMA_IDLE,
+ SIGMA_CAPTURE,
+ SIGMA_DOWNLOAD,
+ } state;
+
+ uint16_t lastts;
+ uint16_t lastsample;
+};
+
+/* Private, per-device-instance driver context. */
+struct dev_context {
+ struct ftdi_context ftdic;
+ uint64_t cur_samplerate;
+ uint64_t period_ps;
+ uint64_t limit_msec;
+ struct timeval start_tv;
+ int cur_firmware;
+ int num_channels;
+ int cur_channels;
+ int samples_per_event;
+ int capture_ratio;
+ struct sigma_trigger trigger;
+ int use_triggers;
+ struct sigma_state state;
+ void *cb_data;
+};
+