+ sr_err("%s: Failed to send header packet: %d.", prefix, ret);
+ return ret;
+ }
+
+ return SR_OK;
+}
+
+#ifdef HAVE_LIBSERIALPORT
+
+/**
+ * Standard serial driver dev_open() helper.
+ *
+ * This function can be used to implement the dev_open() driver API
+ * callback in drivers that use a serial port. The port is opened
+ * with the SERIAL_RDWR and SERIAL_NONBLOCK flags.
+ *
+ * If the open succeeded, the status field of the given sdi is set
+ * to SR_ST_ACTIVE.
+ *
+ * @retval SR_OK Success.
+ * @retval SR_ERR Serial port open failed.
+ */
+SR_PRIV int std_serial_dev_open(struct sr_dev_inst *sdi)
+{
+ struct sr_serial_dev_inst *serial;
+
+ serial = sdi->conn;
+ if (serial_open(serial, SERIAL_RDWR | SERIAL_NONBLOCK) != SR_OK)
+ return SR_ERR;
+
+ sdi->status = SR_ST_ACTIVE;
+
+ return SR_OK;
+}
+
+/**
+ * Standard serial driver dev_close() helper.
+ *
+ * This function can be used to implement the dev_close() driver API
+ * callback in drivers that use a serial port.
+ *
+ * After closing the port, the status field of the given sdi is set
+ * to SR_ST_INACTIVE.
+ *
+ * @retval SR_OK Success.
+ */
+SR_PRIV int std_serial_dev_close(struct sr_dev_inst *sdi)
+{
+ struct sr_serial_dev_inst *serial;
+
+ serial = sdi->conn;
+ if (serial && sdi->status == SR_ST_ACTIVE) {
+ serial_close(serial);
+ sdi->status = SR_ST_INACTIVE;
+ }
+
+ return SR_OK;
+}
+
+/**
+ * Standard sr_session_stop() API helper.
+ *
+ * This function can be used to simplify most (serial port based) driver's
+ * dev_acquisition_stop() API callback.
+ *
+ * @param sdi The device instance for which acquisition should stop.
+ * Must not be NULL.
+ * @param cb_data Opaque 'cb_data' pointer. Must not be NULL.
+ * @param dev_close_fn Function pointer to the driver's dev_close().
+ * Must not be NULL.
+ * @param serial The serial device instance (struct serial_dev_inst *).
+ * Must not be NULL.
+ * @param[in] prefix A driver-specific prefix string used for log messages.
+ * Must not be NULL. An empty string is allowed.
+ *
+ * @retval SR_OK Success.
+ * @retval SR_ERR_ARG Invalid arguments.
+ * @retval SR_ERR_DEV_CLOSED Device is closed.
+ * @retval SR_ERR Other errors.
+ */
+SR_PRIV int std_serial_dev_acquisition_stop(struct sr_dev_inst *sdi,
+ void *cb_data, dev_close_t dev_close_fn,
+ struct sr_serial_dev_inst *serial, const char *prefix)
+{
+ int ret;
+ struct sr_datafeed_packet packet;
+
+ if (!prefix) {
+ sr_err("Invalid prefix.");
+ return SR_ERR_ARG;
+ }
+
+ if (sdi->status != SR_ST_ACTIVE) {
+ sr_err("%s: Device inactive, can't stop acquisition.", prefix);
+ return SR_ERR_DEV_CLOSED;
+ }
+
+ sr_dbg("%s: Stopping acquisition.", prefix);
+
+ if ((ret = serial_source_remove(serial)) < 0) {
+ sr_err("%s: Failed to remove source: %d.", prefix, ret);
+ return ret;
+ }
+
+ if ((ret = dev_close_fn(sdi)) < 0) {
+ sr_err("%s: Failed to close device: %d.", prefix, ret);
+ return ret;
+ }
+
+ /* Send SR_DF_END packet to the session bus. */
+ sr_dbg("%s: Sending SR_DF_END packet.", prefix);
+ packet.type = SR_DF_END;
+ packet.payload = NULL;
+ if ((ret = sr_session_send(cb_data, &packet)) < 0) {
+ sr_err("%s: Failed to send SR_DF_END packet: %d.", prefix, ret);