int bladerf_set_loopback(struct bladerf *dev, bladerf_loopback l)
{
int status;
MUTEX_LOCK(&dev->ctrl_lock);
if (l == BLADERF_LB_FIRMWARE) {
/* Firmware loopback was fully implemented in FW v1.7.1
* (1.7.0 could enable it, but 1.7.1 also allowed readback,
* so we'll enforce 1.7.1 here. */
if (version_less_than(&dev->fw_version, 1, 7, 1)) {
log_warning("Firmware v1.7.1 or later is required "
"to use firmware loopback.\n\n");
status = BLADERF_ERR_UPDATE_FW;
goto out;
} else {
/* Samples won't reach the LMS when the device is in firmware
* loopback mode. By placing the LMS into a loopback mode, we ensure
* that the PAs will be disabled, and remain enabled across
* frequency changes.
*/
status = lms_set_loopback_mode(dev, BLADERF_LB_RF_LNA3);
if (status != 0) {
goto out;
}
status = dev->fn->set_firmware_loopback(dev, true);
}
} else {
/* If applicable, ensure FW loopback is disabled */
if (version_greater_or_equal(&dev->fw_version, 1, 7, 1)) {
bool fw_lb_enabled = false;
/* Query first, as the implementation of setting the mode
* may interrupt running streams. The API don't guarantee that
* switching loopback modes on the fly to work, but we can at least
* try to avoid unnecessarily interrupting things...*/
status = dev->fn->get_firmware_loopback(dev, &fw_lb_enabled);
if (status != 0) {
goto out;
}
if (fw_lb_enabled) {
status = dev->fn->set_firmware_loopback(dev, false);
if (status != 0) {
goto out;
}
}
}
status = lms_set_loopback_mode(dev, l);
}
out:
MUTEX_UNLOCK(&dev->ctrl_lock);
return status;
}
int bladerf_set_loopback(struct bladerf *dev, bladerf_loopback l)
{
if (l == BLADERF_LB_FIRMWARE) {
return dev->fn->set_firmware_loopback(dev, true);
} else {
return lms_set_loopback_mode(dev, l);
}
}
int bladerf_set_loopback(struct bladerf *dev, bladerf_loopback l)
{
if (l == BLADERF_LB_FIRMWARE) {
/* Firmware loopback was implemented in FW v1.7.0 */
if (version_less_than(&dev->fw_version, 1, 7, 0)) {
log_warning("Firmware v1.7.0 or later is required "
"for firmware loopback\n");
return BLADERF_ERR_UNSUPPORTED;
} else {
return dev->fn->set_firmware_loopback(dev, true);
}
} else {
return lms_set_loopback_mode(dev, l);
}
}
