static int set_and_check_rational(struct bladerf *dev, bladerf_module m,
struct bladerf_rational_rate *rate)
{
int status;
struct bladerf_rational_rate actual, readback;
status = bladerf_set_rational_sample_rate(dev, m, rate, &actual);
if (status != 0) {
PR_ERROR("Failed to set rational sample rate: %s\n",
bladerf_strerror(status));
return status;
}
status = bladerf_get_rational_sample_rate(dev, m, &readback);
if (status != 0) {
PR_ERROR("Failed to read back rational sample rate: %s\n",
bladerf_strerror(status));
return status;
}
if (actual.integer != readback.integer ||
actual.num != readback.num ||
actual.den != readback.den ) {
PR_ERROR("Readback mismatch:\n"
" actual: int=%"PRIu64" num=%"PRIu64" den=%"PRIu64"\n"
" readback: int=%"PRIu64" num=%"PRIu64" den=%"PRIu64"\n",
actual.integer, actual.num, actual.den,
readback.integer, readback.num, readback.den);
return status;
}
return 0;
}
static inline int backup_and_update_settings(struct bladerf *dev,
bladerf_module module,
struct settings *settings)
{
int status;
status = bladerf_get_bandwidth(dev, module, &settings->bandwidth);
if (status != 0) {
return status;
}
status = bladerf_get_frequency(dev, module, &settings->frequency);
if (status != 0) {
return status;
}
status = bladerf_get_rational_sample_rate(dev, module,
&settings->samplerate);
if (status != 0) {
return status;
}
status = bladerf_set_bandwidth(dev, module, CAL_BANDWIDTH, NULL);
if (status != 0) {
return status;
}
status = bladerf_set_sample_rate(dev, module, CAL_SAMPLERATE, NULL);
return status;
}
static int get_rx_cal_backup(struct bladerf *dev, struct rx_cal_backup *b)
{
int status;
status = bladerf_get_rational_sample_rate(dev, BLADERF_MODULE_RX,
&b->rational_sample_rate);
if (status != 0) {
return status;
}
status = bladerf_get_bandwidth(dev, BLADERF_MODULE_RX, &b->bandwidth);
if (status != 0) {
return status;
}
status = bladerf_get_frequency(dev, BLADERF_MODULE_TX, &b->tx_freq);
if (status != 0) {
return status;
}
return status;
}
/* We've found that running samples through the LMS6 tends to be required
* for the TX LPF calibration to converge */
static inline int tx_lpf_dummy_tx(struct bladerf *dev)
{
int status;
int retval = 0;
struct bladerf_metadata meta;
int16_t zero_sample[] = { 0, 0 };
bladerf_loopback loopback_backup;
struct bladerf_rational_rate sample_rate_backup;
memset(&meta, 0, sizeof(meta));
status = bladerf_get_loopback(dev, &loopback_backup);
if (status != 0) {
return status;
}
status = bladerf_get_rational_sample_rate(dev, BLADERF_MODULE_TX,
&sample_rate_backup);
if (status != 0) {
return status;
}
status = bladerf_set_loopback(dev, BLADERF_LB_BB_TXVGA1_RXVGA2);
if (status != 0) {
goto out;
}
status = bladerf_set_sample_rate(dev, BLADERF_MODULE_TX, 3000000, NULL);
if (status != 0) {
goto out;
}
status = bladerf_sync_config(dev, BLADERF_MODULE_TX,
BLADERF_FORMAT_SC16_Q11_META,
64, 16384, 16, 1000);
if (status != 0) {
goto out;
}
status = bladerf_enable_module(dev, BLADERF_MODULE_TX, true);
if (status != 0) {
goto out;
}
meta.flags = BLADERF_META_FLAG_TX_BURST_START |
BLADERF_META_FLAG_TX_BURST_END |
BLADERF_META_FLAG_TX_NOW;
status = bladerf_sync_tx(dev, zero_sample, 1, &meta, 2000);
if (status != 0) {
goto out;
}
out:
status = bladerf_enable_module(dev, BLADERF_MODULE_TX, false);
if (status != 0 && retval == 0) {
retval = status;
}
status = bladerf_set_rational_sample_rate(dev, BLADERF_MODULE_TX,
&sample_rate_backup, NULL);
if (status != 0 && retval == 0) {
retval = status;
}
status = bladerf_set_loopback(dev, loopback_backup);
if (status != 0 && retval == 0) {
retval = status;
}
return retval;
}
