rh: add support for rhodium devices

Co-authored-by: Humberto Jimenez <humberto.jimenez@ni.com>
Co-authored-by: Alex Williams <alex.williams@ni.com>
Co-authored-by: Derek Kozel <derek.kozel@ni.com>

1 files changed, 135 insertions, 0 deletions

diff --git a/host/lib/usrp/dboard/rhodium/rhodium_bands.cpp b/host/lib/usrp/dboard/rhodium/rhodium_bands.cpp
new file mode 100644
index 000000000..ffa206195
--- /dev/null
+++ b/host/lib/usrp/dboard/rhodium/rhodium_bands.cpp
@@ -0,0 +1,135 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#include "rhodium_radio_ctrl_impl.hpp"
+#include "rhodium_constants.hpp"
+#include <uhd/utils/math.hpp>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::rfnoc;
+using namespace uhd::math::fp_compare;
+
+namespace {
+    constexpr double FREQ_COMPARE_EPSILON = 1e-5;
+
+    /* Note on the RX filter bank:
+     *
+     * The RX path has 8 bands, which we call BAND0 through BAND7. BAND0 is the
+     * lowest frequency band. BAND7 is the highest frequency band.
+     *
+     * The following constants define lower cutoff frequencies for each band.
+     * RHODIUM_RX_BAND1_MIN_FREQ is the cutover frequency for switching from
+     * BAND0 to BAND1, and so on.
+     *
+     * Bands 1-7 have both high- and low-pass filters (effectively band
+     * passes). Band 0 has only low-pass filters. Frequencies have been
+     * chosen to allow as much of the full bandwidth through unattenuated.
+     *
+     * Switch selection logic for these bands can be found in
+     * rhodium_radio_ctrl_impl::_update_rx_freq_switches()
+     */
+    constexpr double RHODIUM_RX_BAND0_MIN_FREQ = RHODIUM_MIN_FREQ;
+    constexpr double RHODIUM_RX_BAND1_MIN_FREQ = 450e6;
+    constexpr double RHODIUM_RX_BAND2_MIN_FREQ = 760e6;
+    constexpr double RHODIUM_RX_BAND3_MIN_FREQ = 1100e6;
+    constexpr double RHODIUM_RX_BAND4_MIN_FREQ = 1410e6;
+    constexpr double RHODIUM_RX_BAND5_MIN_FREQ = 2050e6;
+    constexpr double RHODIUM_RX_BAND6_MIN_FREQ = 3000e6;
+    constexpr double RHODIUM_RX_BAND7_MIN_FREQ = 4500e6;
+
+    /* Note on the TX filter bank:
+     *
+     * The TX path has 8 bands, which we call BAND0 through BAND7. BAND0 is the
+     * lowest frequency band. BAND7 is the highest frequency band.
+     *
+     * The following constants define lower cutoff frequencies for each band.
+     * RHODIUM_TX_BAND1_MIN_FREQ is the cutover frequency for switching from
+     * BAND0 to BAND1, and so on.
+     *
+     * All filters on the TX filter bank are low pass filters (no high pass
+     * filters). Frequencies have been chosen to allow as much of the full
+     * bandwidth through unattenuated.
+     *
+     * Switch selection logic for these bands can be found in
+     * rhodium_radio_ctrl_impl::_update_tx_freq_switches()
+     */
+    constexpr double RHODIUM_TX_BAND0_MIN_FREQ = RHODIUM_MIN_FREQ;
+    constexpr double RHODIUM_TX_BAND1_MIN_FREQ = 450e6;
+    constexpr double RHODIUM_TX_BAND2_MIN_FREQ = 650e6;
+    constexpr double RHODIUM_TX_BAND3_MIN_FREQ = 1000e6;
+    constexpr double RHODIUM_TX_BAND4_MIN_FREQ = 1350e6;
+    constexpr double RHODIUM_TX_BAND5_MIN_FREQ = 1900e6;
+    constexpr double RHODIUM_TX_BAND6_MIN_FREQ = 3000e6;
+    constexpr double RHODIUM_TX_BAND7_MIN_FREQ = 4100e6;
+}
+
+rhodium_radio_ctrl_impl::rx_band
+rhodium_radio_ctrl_impl::_map_freq_to_rx_band(const double freq) {
+
+    auto freq_compare = fp_compare_epsilon<double>(freq, RHODIUM_FREQ_COMPARE_EPSILON);
+
+    if (freq_compare < RHODIUM_RX_BAND0_MIN_FREQ) {
+        return rx_band::RX_BAND_INVALID;
+    } else if (freq_compare < RHODIUM_RX_BAND1_MIN_FREQ) {
+        return rx_band::RX_BAND_0;
+    } else if (freq_compare < RHODIUM_RX_BAND2_MIN_FREQ) {
+        return rx_band::RX_BAND_1;
+    } else if (freq_compare < RHODIUM_RX_BAND3_MIN_FREQ) {
+        return rx_band::RX_BAND_2;
+    } else if (freq_compare < RHODIUM_RX_BAND4_MIN_FREQ) {
+        return rx_band::RX_BAND_3;
+    } else if (freq_compare < RHODIUM_RX_BAND5_MIN_FREQ) {
+        return rx_band::RX_BAND_4;
+    } else if (freq_compare < RHODIUM_RX_BAND6_MIN_FREQ) {
+        return rx_band::RX_BAND_5;
+    } else if (freq_compare < RHODIUM_RX_BAND7_MIN_FREQ) {
+        return rx_band::RX_BAND_6;
+    } else if (freq_compare <= RHODIUM_MAX_FREQ) {
+        return rx_band::RX_BAND_7;
+    } else {
+        return rx_band::RX_BAND_INVALID;
+    }
+}
+
+rhodium_radio_ctrl_impl::tx_band
+rhodium_radio_ctrl_impl::_map_freq_to_tx_band(const double freq) {
+
+    auto freq_compare = fp_compare_epsilon<double>(freq, RHODIUM_FREQ_COMPARE_EPSILON);
+
+    if (freq_compare < RHODIUM_TX_BAND0_MIN_FREQ) {
+        return tx_band::TX_BAND_INVALID;
+    } else if (freq_compare < RHODIUM_TX_BAND1_MIN_FREQ) {
+        return tx_band::TX_BAND_0;
+    } else if (freq_compare < RHODIUM_TX_BAND2_MIN_FREQ) {
+        return tx_band::TX_BAND_1;
+    } else if (freq_compare < RHODIUM_TX_BAND3_MIN_FREQ) {
+        return tx_band::TX_BAND_2;
+    } else if (freq_compare < RHODIUM_TX_BAND4_MIN_FREQ) {
+        return tx_band::TX_BAND_3;
+    } else if (freq_compare < RHODIUM_TX_BAND5_MIN_FREQ) {
+        return tx_band::TX_BAND_4;
+    } else if (freq_compare < RHODIUM_TX_BAND6_MIN_FREQ) {
+        return tx_band::TX_BAND_5;
+    } else if (freq_compare < RHODIUM_TX_BAND7_MIN_FREQ) {
+        return tx_band::TX_BAND_6;
+    } else if (freq_compare <= RHODIUM_MAX_FREQ) {
+        return tx_band::TX_BAND_7;
+    } else {
+        return tx_band::TX_BAND_INVALID;
+    }
+}
+
+bool rhodium_radio_ctrl_impl::_is_rx_lowband(const double freq)
+{
+    return _map_freq_to_rx_band(freq) == rx_band::RX_BAND_0;
+}
+
+bool rhodium_radio_ctrl_impl::_is_tx_lowband(const double freq)
+{
+    return _map_freq_to_tx_band(freq) == tx_band::TX_BAND_0;
+}
+