uhd: initial commit of UHD support for E320

Co-authored-by: Sugandha Gupta <sugandha.gupta@ettus.com>

9 files changed, 1864 insertions, 0 deletions

diff --git a/host/lib/usrp/dboard/neon/CMakeLists.txt b/host/lib/usrp/dboard/neon/CMakeLists.txt
new file mode 100644
index 000000000..e1ee0fba4
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/CMakeLists.txt
@@ -0,0 +1,15 @@
+#
+# Copyright 2018 Ettus Research, a National Instruments Company
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+IF(ENABLE_E320)
+    LIST(APPEND NEON_SOURCES
+        ${CMAKE_CURRENT_SOURCE_DIR}/neon_radio_ctrl_impl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/neon_radio_ctrl_init.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/neon_ad9361_iface.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/neon_bands.cpp
+    )
+    LIBUHD_APPEND_SOURCES(${NEON_SOURCES})
+ENDIF(ENABLE_E320)
diff --git a/host/lib/usrp/dboard/neon/neon_ad9361_iface.cpp b/host/lib/usrp/dboard/neon/neon_ad9361_iface.cpp
new file mode 100644
index 000000000..e19f890ca
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_ad9361_iface.cpp
@@ -0,0 +1,162 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#include "neon_ad9361_iface.hpp"
+#include <uhd/exception.hpp>
+#include <uhd/utils/log.hpp>
+#include <boost/format.hpp>
+
+using namespace uhd;
+
+class neon_ad9361_iface : public ad9361_ctrl
+{
+public:
+    neon_ad9361_iface(
+        rpc_client::sptr rpcc
+    ) : _rpcc(rpcc)
+    , _rpc_prefix("db_0_")
+    , _log_prefix("AD9361")
+    {
+        UHD_LOG_TRACE(_log_prefix,
+            "Initialized controls with RPC prefix " << _rpc_prefix);
+    }
+
+    double set_bw_filter(const std::string &which, const double bw)
+    {
+        return _rpcc->request_with_token<double>(
+            this->_rpc_prefix + "set_bw_filter", which, bw);
+    }
+
+    double set_gain(const std::string &which, const double value)
+    {
+        return _rpcc->request_with_token<double>(
+            this->_rpc_prefix + "set_gain", which, value);
+    }
+
+    void set_agc(const std::string &which, bool enable)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "set_agc", which, enable);
+    }
+
+    void set_agc_mode(const std::string &which, const std::string &mode)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "set_agc_mode", which, mode);
+    }
+
+    double set_clock_rate(const double rate)
+    {
+        return _rpcc->request_with_token<double>(
+            this->_rpc_prefix + "set_clock_rate", rate);
+    }
+
+    void set_active_chains(bool tx1, bool tx2, bool rx1, bool rx2)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "set_active_chains", tx1, tx2, rx1, rx2);
+    }
+
+    double tune(const std::string &which, const double value)
+    {
+        return _rpcc->request_with_token<double>(
+            this->_rpc_prefix + "tune", which, value);
+    }
+
+    void set_dc_offset_auto(const std::string &which, const bool on)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "set_dc_offset_auto", which, on);
+    }
+
+    void set_timing_mode(const std::string &timing_mode)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "set_timing_mode", timing_mode);
+    }
+
+    void set_iq_balance_auto(const std::string &which, const bool on)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "set_iq_balance_auto", which, on);
+    }
+
+    double get_freq(const std::string &which)
+    {
+        return _rpcc->request_with_token<double>(
+            this->_rpc_prefix + "get_freq", which);
+    }
+
+    void data_port_loopback(const bool on)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "data_port_loopback", on);
+    }
+
+    sensor_value_t get_rssi(const std::string &which)
+    {
+        return sensor_value_t(_rpcc->request_with_token<sensor_value_t::sensor_map_t>(
+            this->_rpc_prefix + "get_rssi", which));
+    }
+
+    sensor_value_t get_temperature()
+    {
+        return sensor_value_t(_rpcc->request_with_token<sensor_value_t::sensor_map_t>(
+            this->_rpc_prefix + "get_temperature"));
+    }
+
+    std::vector<std::string> get_filter_names(const std::string &which)
+    {
+        return _rpcc->request_with_token<std::vector<std::string>>(
+            this->_rpc_prefix + "get_filter_names", which);
+    }
+
+    filter_info_base::sptr get_filter(const std::string &/*which*/,
+                                                        const std::string &/*filter_name*/)
+    {
+        throw uhd::runtime_error("ad9361_ctrl::get_filter is not supported over an RPC connection");
+    }
+
+    void set_filter(const std::string &/*which*/,
+                                    const std::string &/*filter_name*/,
+                                    const filter_info_base::sptr /*filter*/)
+    {
+        throw uhd::runtime_error("ad9361_ctrl::set_filter is not supported over an RPC connection");
+    }
+
+    void output_digital_test_tone(bool enb)
+    {
+        _rpcc->request_with_token<void>(
+            this->_rpc_prefix + "output_digital_test_tone", enb);
+    }
+
+private:
+    //! Reference to the RPC client
+    rpc_client::sptr _rpcc;
+
+    //! Stores the prefix to RPC calls
+    const std::string _rpc_prefix;
+
+    //! Logger prefix
+    const std::string _log_prefix;
+};
+
+//! Factory function for Neon's AD9361 RPC Controller
+ad9361_ctrl::sptr make_rpc(rpc_client::sptr rpcc)
+{
+    return ad9361_ctrl::sptr(new neon_ad9361_iface(rpcc));
+}
+
+/*! Helper function to convert direction and channel to the 'which' required by most Catalina
+    driver functions */
+std::string get_which_ad9361_chain(const direction_t dir, const size_t chan)
+{
+    UHD_ASSERT_THROW(dir == RX_DIRECTION or dir == TX_DIRECTION);
+    UHD_ASSERT_THROW(chan == 0 or chan == 1);
+    return str(boost::format("%s%d")
+            % (dir == RX_DIRECTION ? "RX" : "TX")
+            % (chan + 1));
+}
diff --git a/host/lib/usrp/dboard/neon/neon_ad9361_iface.hpp b/host/lib/usrp/dboard/neon/neon_ad9361_iface.hpp
new file mode 100644
index 000000000..1f055aca4
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_ad9361_iface.hpp
@@ -0,0 +1,26 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#ifndef INCLUDED_LIBUHD_RFNOC_NEON_AD9361_IFACE_HPP
+#define INCLUDED_LIBUHD_RFNOC_NEON_AD9361_IFACE_HPP
+
+#include <uhd/types/direction.hpp>
+#include <uhd/types/filters.hpp>
+#include <uhd/types/sensors.hpp>
+#include <uhdlib/usrp/common/ad9361_ctrl.hpp>
+#include <uhdlib/utils/rpc.hpp>
+#include <memory>
+#include <string>
+#include <vector>
+
+using namespace uhd;
+using namespace uhd::usrp;
+
+ad9361_ctrl::sptr make_rpc(rpc_client::sptr rpcc);
+std::string get_which_ad9361_chain(const direction_t dir, const size_t chan);
+
+#endif /* INCLUDED_LIBUHD_RFNOC_NEON_AD9361_IFACE_HPP */
+// vim: sw=4 et:
diff --git a/host/lib/usrp/dboard/neon/neon_bands.cpp b/host/lib/usrp/dboard/neon/neon_bands.cpp
new file mode 100644
index 000000000..3b0ab2ca1
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_bands.cpp
@@ -0,0 +1,157 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#include "neon_radio_ctrl_impl.hpp"
+#include "neon_constants.hpp"
+#include <uhd/utils/math.hpp>
+
+/*
+ * Neon frequency bands:
+ *
+ * For RX:
+ *     Band   Freq      BSEL-210 BSEL-543         TX/RX                RX2
+ *                                         SEL_10   |   FE_SEL_210    SEL_10
+ *                                                   chan 1 | chan 2
+ *     -------------------------------------------------------------------------
+ *     LB_B2: < 450     RF5 100  RF6 101    01       RF3 100  RF1 001   10
+ *     LB_B3: 450-700   RF6 101  RF5 100    01       RF3 100  RF1 001   10
+ *     LB_B4: 700-1200  RF3 010  RF4 011    01       RF3 100  RF1 001   10
+ *     LB_B5: 1200-1800 RF4 011  RF3 010    01       RF3 100  RF1 001   10
+ *     LB_B6: 1800-2350 RF1 000  RF2 001    01       RF3 100  RF1 001   10
+ *     LB_B7: 2350-2600 RF2 001  RF1 000    01       RF3 100  RF1 001   10
+ *     HB:    2600+     --- 111  --- 111    10       RF3 100  RF1 001   01
+ *
+ *     SEL_1 SEL_0
+ *      1    0    ANT1(RX_HB)--TX/RX, ANT2(RX_LB)--RX
+ *      0    1    ANT1(RX_HB)--RX, ANT2(RX_LB)--TX/RX
+ *
+ * For TX:
+ *     Band-Freq              BSEL-210 BSEL-543       TX/RX
+ *                                                 FE_SEL_210
+ *                                               chan 1 | chan 2
+ *     ------------------------------------------------------------
+ *     LB_80   < 117.7        RF7 011  RF8 111   RF1 001   RF3 100
+ *     LB_160  117.7-178.2    RF8 111  RF7 011   RF1 001   RF3 100
+ *     LB_225  178.2-284.3    RF5 001  RF6 101   RF1 001   RF3 100
+ *     LB_400  284.3-453.7    RF6 101  RF5 001   RF1 001   RF3 100
+ *     LB_575  453.7-723.8    RF3 010  RF4 110   RF1 001   RF3 100
+ *     LB_1000 723.8-1154.9   RF4 110  RF3 010   RF1 001   RF3 100
+ *     LB_1700 1154.9-1842.6  RF1 000  RF2 100   RF1 001   RF3 100
+ *     LB_2750 1842.6-2940.0  RF2 100  RF1 000   RF1 001   RF3 100
+ *     HB_5850 > 2490.0       --- ---  --- ---   RF2 010   RF2 010
+ *
+ */
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::rfnoc;
+using namespace uhd::math::fp_compare;
+
+namespace {
+    /* Note on the RX filter bank:
+     *
+     * The RX path has 7 bands, which we call LB_B2, B3, .. HB same as
+     * the schematic.
+     *
+     * The following constants define lower cutoff frequencies for each band.
+     * LB_B2 does not have a lower cutoff frequency, it is implied by
+     * AD9361_MIN_FREQ. NEON_RX_BAND1_MIN_FREQ is the cutover frequency
+     * for switching from LB_B2 to LB_B3, and so on.
+     *
+     * Bands 1-6 have both high- and low-pass filters (effectively band
+     * passes). Frequencies need to be chosen to allow as much of the full
+     * bandwidth through unattenuated.
+     */
+    constexpr double NEON_RX_LB_BAND3_MIN_FREQ = 450e6;
+    constexpr double NEON_RX_LB_BAND4_MIN_FREQ = 700e6;
+    constexpr double NEON_RX_LB_BAND5_MIN_FREQ = 1200e6;
+    constexpr double NEON_RX_LB_BAND6_MIN_FREQ = 1800e6;
+    constexpr double NEON_RX_LB_BAND7_MIN_FREQ = 2350e6;
+    constexpr double NEON_RX_HB_MIN_FREQ = 2600e6;
+
+    /* Note on the TX filter bank:
+     *
+     * The TX path has 9 bands, which we name according to the schematic.
+     *
+     * The following constants define lower cutoff frequencies for each band.
+     * LB_80 does not have a lower cutoff frequency, it is implied by
+     * AD9361_MIN_FREQ. NEON_TX_LB_160_MIN_FREQ is the cutover frequency
+     * for switching from LB_80 to LB_160, and so on.
+     *
+     * On current Neon revisions, all filters on the TX filter bank are
+     * low pass filters (no high pass filters).
+     * Frequencies need to be chosen to allow as much of the full bandwidth
+     * through unattenuated (so don't go all the way up to the cutoff frequency
+     * of that filter).
+     */
+    constexpr double NEON_TX_LB_160_MIN_FREQ = 117.7e6;
+    constexpr double NEON_TX_LB_225_MIN_FREQ = 178.2e6;
+    constexpr double NEON_TX_LB_400_MIN_FREQ = 284.3e6;
+    constexpr double NEON_TX_LB_575_MIN_FREQ = 453.7e6;
+    constexpr double NEON_TX_LB_1000_MIN_FREQ = 723.8e6;
+    constexpr double NEON_TX_LB_1700_MIN_FREQ = 1154.9e6;
+    constexpr double NEON_TX_LB_2750_MIN_FREQ = 1842.6e6;
+    constexpr double NEON_TX_HB_MIN_FREQ = 2940.0e6;
+}
+
+neon_radio_ctrl_impl::rx_band
+neon_radio_ctrl_impl::_map_freq_to_rx_band(const double freq) {
+    neon_radio_ctrl_impl::rx_band band;
+
+    if (fp_compare_epsilon<double>(freq) < AD9361_MIN_FREQ) {
+        band = rx_band::INVALID_BAND;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_RX_LB_BAND3_MIN_FREQ) {
+        band = rx_band::LB_B2;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_RX_LB_BAND4_MIN_FREQ) {
+        band = rx_band::LB_B3;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_RX_LB_BAND5_MIN_FREQ) {
+        band = rx_band::LB_B4;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_RX_LB_BAND6_MIN_FREQ) {
+        band = rx_band::LB_B5;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_RX_LB_BAND7_MIN_FREQ) {
+        band = rx_band::LB_B6;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_RX_HB_MIN_FREQ) {
+        band = rx_band::LB_B7;
+    } else if (fp_compare_epsilon<double>(freq) <= AD9361_MAX_FREQ) {
+        band = rx_band::HB;
+    } else {
+        band = rx_band::INVALID_BAND;
+    }
+
+    return band;
+}
+
+neon_radio_ctrl_impl::tx_band
+neon_radio_ctrl_impl::_map_freq_to_tx_band(const double freq) {
+    neon_radio_ctrl_impl::tx_band band;
+
+    if (fp_compare_epsilon<double>(freq) < AD9361_MIN_FREQ) {
+        band = tx_band::INVALID_BAND;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_LB_160_MIN_FREQ) {
+        band = tx_band::LB_80;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_LB_225_MIN_FREQ) {
+        band = tx_band::LB_160;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_LB_400_MIN_FREQ) {
+        band = tx_band::LB_225;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_LB_575_MIN_FREQ) {
+        band = tx_band::LB_400;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_LB_1000_MIN_FREQ) {
+        band = tx_band::LB_575;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_LB_1700_MIN_FREQ) {
+        band = tx_band::LB_1000;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_LB_2750_MIN_FREQ) {
+        band = tx_band::LB_1700;
+    } else if (fp_compare_epsilon<double>(freq) < NEON_TX_HB_MIN_FREQ) {
+        band = tx_band::LB_2750;
+    } else if (fp_compare_epsilon<double>(freq) <= AD9361_MAX_FREQ) {
+        band = tx_band::HB;
+    } else {
+        band = tx_band::INVALID_BAND;
+    }
+
+    return band;
+}
+
diff --git a/host/lib/usrp/dboard/neon/neon_constants.hpp b/host/lib/usrp/dboard/neon/neon_constants.hpp
new file mode 100644
index 000000000..dc560ca93
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_constants.hpp
@@ -0,0 +1,51 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#ifndef INCLUDED_LIBUHD_NEON_CONSTANTS_HPP
+#define INCLUDED_LIBUHD_NEON_CONSTANTS_HPP
+
+#include <vector>
+#include <string>
+#include <cstddef>
+
+static constexpr size_t FPGPIO_MASTER_RADIO = 0;
+static constexpr size_t TOTAL_RADIO_PORTS = 2;
+static constexpr double AD9361_RX_MIN_BANDWIDTH = 20.0e6;  // HZ
+static constexpr double AD9361_RX_MAX_BANDWIDTH = 40.0e6; // HZ
+
+static constexpr double AD9361_TX_MIN_BANDWIDTH = 20.0e6;  // HZ
+static constexpr double AD9361_TX_MAX_BANDWIDTH = 40.0e6; // HZ
+
+static constexpr double AD9361_MIN_FREQ = 70.0e6; // Hz
+static constexpr double AD9361_MAX_FREQ = 6.0e9; // Hz
+
+static constexpr double NEON_RADIO_RATE = 16e6; // Hz
+
+static constexpr double AD9361_MIN_RX_GAIN = 0.0; // dB
+static constexpr double AD9361_MAX_RX_GAIN = 76; // dB
+static constexpr double AD9361_RX_GAIN_STEP = 1.0; // dB
+static constexpr double AD9361_MIN_TX_GAIN = 0.0; // dB
+static constexpr double AD9361_MAX_TX_GAIN = 89.75; // dB
+static constexpr double AD9361_TX_GAIN_STEP = 0.25; // dB
+
+
+static constexpr bool NEON_DEFAULT_AUTO_DC_OFFSET = true;
+static constexpr bool NEON_DEFAULT_AUTO_IQ_BALANCE = true;
+static constexpr bool NEON_DEFAULT_AGC_ENABLE = false;
+
+static constexpr double NEON_DEFAULT_GAIN = 0.0;
+static constexpr double NEON_DEFAULT_FREQ = 2.4e9; // Hz
+static constexpr double NEON_DEFAULT_BANDWIDTH = 40e6;  // Hz
+static constexpr char   NEON_DEFAULT_RX_ANTENNA[] = "RX2";
+static constexpr char   NEON_DEFAULT_TX_ANTENNA[] = "TX/RX";
+
+static const std::vector<std::string> NEON_RX_ANTENNAS = {
+    "TX/RX", "RX2"
+};
+
+static constexpr size_t NEON_NUM_CHANS = 2;
+
+#endif /* INCLUDED_LIBUHD_NEON_CONSTANTS_HPP */
diff --git a/host/lib/usrp/dboard/neon/neon_radio_ctrl_impl.cpp b/host/lib/usrp/dboard/neon/neon_radio_ctrl_impl.cpp
new file mode 100644
index 000000000..a753a447c
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_radio_ctrl_impl.cpp
@@ -0,0 +1,621 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#include "neon_radio_ctrl_impl.hpp"
+#include "neon_constants.hpp"
+#include "neon_regs.hpp"
+#include <uhd/utils/log.hpp>
+#include <uhd/rfnoc/node_ctrl_base.hpp>
+#include <uhd/transport/chdr.hpp>
+#include <uhd/utils/algorithm.hpp>
+#include <uhd/utils/math.hpp>
+#include <uhd/types/direction.hpp>
+#include <uhd/types/eeprom.hpp>
+#include <uhd/exception.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/make_shared.hpp>
+#include <boost/format.hpp>
+#include <sstream>
+#include <cmath>
+#include <cstdlib>
+
+using namespace uhd;
+using namespace uhd::usrp;
+using namespace uhd::rfnoc;
+using namespace uhd::math::fp_compare;
+
+/******************************************************************************
+ * Structors
+ *****************************************************************************/
+UHD_RFNOC_RADIO_BLOCK_CONSTRUCTOR(neon_radio_ctrl)
+{
+    UHD_LOG_TRACE(unique_id(), "Entering neon_radio_ctrl_impl ctor...");
+    const char radio_slot_name[1] = {'A'};
+    _radio_slot = radio_slot_name[get_block_id().get_block_count()];
+    UHD_LOG_TRACE(unique_id(), "Radio slot: " << _radio_slot);
+    _rpc_prefix = "db_0_";
+
+    _init_defaults();
+    _init_peripherals();
+    _init_prop_tree();
+}
+
+neon_radio_ctrl_impl::~neon_radio_ctrl_impl()
+{
+    UHD_LOG_TRACE(unique_id(), "neon_radio_ctrl_impl::dtor() ");
+}
+
+
+/******************************************************************************
+ * API Calls
+ *****************************************************************************/
+
+bool neon_radio_ctrl_impl::check_radio_config()
+{
+    // mapping of frontend to radio perif index
+    static const size_t FE0 = 0;
+    static const size_t FE1 = 1;
+    const size_t num_rx = _is_streamer_active(RX_DIRECTION, FE0) + _is_streamer_active(RX_DIRECTION, FE1);
+    const size_t num_tx = _is_streamer_active(TX_DIRECTION, FE0) + _is_streamer_active(TX_DIRECTION, FE1);
+
+    //setup the active chains in the codec
+    if ((num_rx + num_tx) == 0) {
+        // Ensure at least one RX chain is enabled so AD9361 outputs a sample clock
+        this->set_streaming_mode(false, false, true, false);
+    } else {
+        this->set_streaming_mode(
+                _is_streamer_active(TX_DIRECTION, FE0),
+                _is_streamer_active(TX_DIRECTION, FE1),
+                _is_streamer_active(RX_DIRECTION, FE0),
+                _is_streamer_active(RX_DIRECTION, FE1)
+        );
+    }
+    return true;
+}
+
+void neon_radio_ctrl_impl::set_streaming_mode(const bool tx1, const bool tx2, const bool rx1, const bool rx2)
+{
+    UHD_LOG_TRACE(unique_id(), "Setting up streaming ...")
+    const size_t num_rx = rx1 + rx2;
+    const size_t num_tx = tx1 + tx2;
+
+    //setup the active chains in the codec
+    _ad9361->set_active_chains(tx1, tx2, rx1, rx2);
+
+    const std::string TIMING_MODE_2R2T = "2R2T";
+    const std::string TIMING_MODE_1R1T = "1R1T";
+    const std::string MIMO = "MIMO";         // 2R2T
+    const std::string SISO_TX1 = "SISO_TX1"; // 1R1T
+    const std::string SISO_TX0 = "SISO_TX0"; // 1R1T
+    // setup 1R1T/2R2T mode in catalina and fpga
+    // The Catalina interface in the fpga needs to know which TX channel to use for
+    // the data on the LVDS lines.
+    if ((num_rx == 2) or (num_tx == 2)) {
+        // AD9361 is in 2R2T mode
+        _ad9361->set_timing_mode(TIMING_MODE_2R2T);
+        this->set_channel_mode(MIMO);
+    } else {
+        // AD9361 is in 1R1T mode
+        _ad9361->set_timing_mode(TIMING_MODE_1R1T);
+
+        // Set to SIS0_TX1 if we're using the second TX antenna, otherwise
+        // default to SISO_TX0
+        this->set_channel_mode(tx2 ? SISO_TX1 : SISO_TX0);
+    }
+}
+
+void neon_radio_ctrl_impl::set_channel_mode(const std::string &channel_mode)
+{
+    //MIMO for 2R2T mode for 2 channels
+    //SISO_TX1 for 1R1T mode for 1 channel - TX1
+    //SISO_TX0 for 1R1T mode for 1 channel - TX0
+
+    _rpcc->request_with_token<void>("set_channel_mode", channel_mode);
+}
+
+/*  loopback_self_test checks the integrity of the FPGA->AD936x->FPGA sample interface.
+    The AD936x is put in loopback mode that sends the TX data unchanged to the RX side.
+    A test value is written to the codec_idle register in the TX side of the radio.
+    The readback register is then used to capture the values on the TX and RX sides
+    simultaneously for comparison. It is a reasonably effective test for AC timing
+    since I/Q Ch0/Ch1 alternate over the same wires. Note, however, that it uses
+    whatever timing is configured at the time the test is called rather than select
+    worst case conditions to stress the interface.
+    Note: This currently only tests 2R2T mode
+*/
+void neon_radio_ctrl_impl::loopback_self_test(
+        std::function<void(uint32_t)> poker_functor,
+        std::function<uint64_t()> peeker_functor
+) {
+    // Set 2R2T mode, stream on all channels
+    this->set_streaming_mode(true, true, true, true);
+    // Set maximum rate for 2R2T mode
+    this->set_rate(30.72e6);
+    // Put AD936x in loopback mode
+    _ad9361->data_port_loopback(true);
+    UHD_LOG_INFO(unique_id(), "Performing CODEC loopback test... ");
+    size_t hash = size_t(time(NULL));
+    constexpr size_t loopback_count = 100;
+
+    // Allow some time for AD936x to enter loopback mode.
+    // There is no clear statement in the documentation of how long it takes,
+    // but UG-570 does say to "allow six ADC_CLK/64 clock cycles of flush time"
+    // when leaving the TX or RX states.  That works out to ~75us at the
+    // minimum clock rate of 5 MHz, which lines up with test results.
+    // Sleeping 1ms is far more than enough.
+    std::this_thread::sleep_for(std::chrono::milliseconds(1));
+
+    for (size_t i = 0; i < loopback_count; i++)
+    {
+        // Create test word
+        boost::hash_combine(hash, i);
+        const uint32_t word32 = uint32_t(hash) & 0xfff0fff0;
+        //const uint32_t word32 = 0xCA00C100;
+        // Write test word to codec_idle idle register (on TX side)
+        poker_functor(word32);
+
+        // Read back values - TX is lower 32-bits and RX is upper 32-bits
+        const uint64_t rb_word64 = peeker_functor();
+        const uint32_t rb_tx = uint32_t(rb_word64 >> 32);
+        const uint32_t rb_rx = uint32_t(rb_word64 & 0xffffffff);
+
+        // Compare TX and RX values to test word
+        bool test_fail = word32 != rb_tx or word32 != rb_rx;
+        if(test_fail)
+        {
+            UHD_LOG_WARNING(unique_id(), "CODEC loopback test failed! "
+              << boost::format("Expected: 0x%08X Received (TX/RX): 0x%08X/0x%08X")
+                  % word32 % rb_tx % rb_rx);
+            throw uhd::runtime_error("CODEC loopback test failed.");
+        }
+    }
+    UHD_LOG_INFO(unique_id(), "CODEC loopback test passed");
+
+    // Zero out the idle data.
+    poker_functor(0);
+
+    // Take AD936x out of loopback mode
+    _ad9361->data_port_loopback(false);
+    this->set_streaming_mode(true, false, true, false);
+}
+
+double neon_radio_ctrl_impl::set_rate(const double rate)
+{
+    std::lock_guard<std::mutex> l(_set_lock);
+    UHD_LOG_DEBUG(unique_id(), "Asking for clock rate " << rate/1e6 << " MHz\n");
+    double actual_tick_rate = _ad9361->set_clock_rate(rate);
+    UHD_LOG_DEBUG(unique_id(), "Actual clock rate " << actual_tick_rate/1e6 << " MHz\n");
+
+    radio_ctrl_impl::set_rate(rate);
+    return rate;
+}
+
+void neon_radio_ctrl_impl::set_tx_antenna(
+        const std::string &ant,
+        const size_t chan
+) {
+    if (ant != get_tx_antenna(chan)) {
+        throw uhd::value_error(str(
+            boost::format("[%s] Requesting invalid TX antenna value: %s")
+            % unique_id()
+            % ant
+        ));
+    }
+    // We can't actually set the TX antenna, so let's stop here.
+}
+
+void neon_radio_ctrl_impl::set_rx_antenna(
+        const std::string &ant,
+        const size_t chan
+) {
+    UHD_ASSERT_THROW(chan <= NEON_NUM_CHANS);
+    if (std::find(NEON_RX_ANTENNAS.begin(),
+                  NEON_RX_ANTENNAS.end(),
+                  ant) == NEON_RX_ANTENNAS.end()) {
+        throw uhd::value_error(str(
+            boost::format("[%s] Requesting invalid RX antenna value: %s")
+            % unique_id()
+            % ant
+        ));
+    }
+    UHD_LOG_TRACE(unique_id(),
+        "Setting RX antenna to " << ant << " for chan " << chan);
+
+    _set_atr_bits(chan, radio_ctrl_impl::get_rx_frequency(chan), ant);
+    radio_ctrl_impl::set_rx_antenna(ant, chan);
+}
+
+double neon_radio_ctrl_impl::set_tx_frequency(
+        const double freq,
+        const size_t chan
+) {
+    UHD_LOG_TRACE(unique_id(),
+        "set_tx_frequency(f=" << freq << ", chan=" << chan << ")");
+    std::lock_guard<std::mutex> l(_set_lock);
+
+    double coerced_freq = _ad9361->tune(
+        get_which_ad9361_chain(TX_DIRECTION, chan),
+        freq);
+    radio_ctrl_impl::set_tx_frequency(coerced_freq, chan);
+    // Antenna settings
+    auto ant = get_tx_antenna(chan);
+    // Front-end switching
+    _set_atr_bits(chan, freq, ant);
+
+    return coerced_freq;
+}
+
+double neon_radio_ctrl_impl::set_rx_frequency(
+        const double freq,
+        const size_t chan
+) {
+    UHD_LOG_TRACE(unique_id(),
+        "set_rx_frequency(f=" << freq << ", chan=" << chan << ")");
+    std::lock_guard<std::mutex> l(_set_lock);
+
+    double coerced_freq = _ad9361->tune(
+        get_which_ad9361_chain(RX_DIRECTION, chan),
+        freq);
+    radio_ctrl_impl::set_rx_frequency(coerced_freq, chan);
+    // Antenna settings
+    auto ant = get_rx_antenna(chan);
+    // Front-end switching
+    _set_atr_bits(chan, coerced_freq, ant);
+
+    return coerced_freq;
+}
+
+double neon_radio_ctrl_impl::set_rx_bandwidth(
+        const double bandwidth,
+        const size_t chan
+) {
+    std::lock_guard<std::mutex> l(_set_lock);
+    double clipped_bw = _ad9361->set_bw_filter(
+        get_which_ad9361_chain(RX_DIRECTION, chan),
+        bandwidth);
+    return radio_ctrl_impl::set_rx_bandwidth(clipped_bw, chan);
+}
+
+double neon_radio_ctrl_impl::set_tx_bandwidth(
+        const double bandwidth,
+        const size_t chan
+) {
+    std::lock_guard<std::mutex> l(_set_lock);
+    double clipped_bw = _ad9361->set_bw_filter(
+        get_which_ad9361_chain(TX_DIRECTION, chan),
+        bandwidth);
+    return radio_ctrl_impl::set_tx_bandwidth(clipped_bw, chan);
+}
+
+double neon_radio_ctrl_impl::set_tx_gain(
+        const double gain,
+        const size_t chan
+) {
+    std::lock_guard<std::mutex> l(_set_lock);
+    UHD_LOG_TRACE(unique_id(),
+        "set_tx_gain(gain=" << gain << ", chan=" << chan << ")");
+    double clip_gain = uhd::clip(gain, AD9361_MIN_TX_GAIN, AD9361_MAX_TX_GAIN);
+    _ad9361->set_gain(
+        get_which_ad9361_chain(TX_DIRECTION, chan),
+        clip_gain);
+    radio_ctrl_impl::set_tx_gain(clip_gain, chan);
+    return clip_gain;
+}
+
+double neon_radio_ctrl_impl::set_rx_gain(
+        const double gain,
+        const size_t chan
+) {
+    std::lock_guard<std::mutex> l(_set_lock);
+    UHD_LOG_TRACE(unique_id(),
+        "set_rx_gain(gain=" << gain << ", chan=" << chan << ")");
+    double clip_gain = uhd::clip(gain, AD9361_MIN_RX_GAIN, AD9361_MAX_RX_GAIN);
+    _ad9361->set_gain(
+        get_which_ad9361_chain(RX_DIRECTION, chan),
+        clip_gain);
+    radio_ctrl_impl::set_rx_gain(clip_gain, chan);
+    return clip_gain;
+}
+
+size_t neon_radio_ctrl_impl::get_chan_from_dboard_fe(
+    const std::string &fe, const direction_t /* dir */
+) {
+    const size_t chan = boost::lexical_cast<size_t>(fe);
+    if (chan > _get_num_radios()-1) {
+        UHD_LOG_WARNING(unique_id(),
+            boost::format("Invalid channel determined from dboard frontend %s.") % fe);
+    }
+    return chan;
+}
+
+std::string neon_radio_ctrl_impl::get_dboard_fe_from_chan(
+    const size_t chan,
+    const direction_t /* dir */
+) {
+    return std::to_string(chan);
+}
+
+void neon_radio_ctrl_impl::set_rpc_client(
+    uhd::rpc_client::sptr rpcc,
+    const uhd::device_addr_t &block_args
+) {
+    _rpcc = rpcc;
+    _block_args = block_args;
+    UHD_LOG_TRACE(unique_id(), "Instantiating AD9361 control object...");
+    _ad9361 = make_rpc(_rpcc);
+
+    UHD_LOG_TRACE(unique_id(), "Setting Catalina Defaults... ");
+    //Initialize catalina
+    this->_init_codec();
+
+    if (block_args.has_key("identify")) {
+        const std::string identify_val = block_args.get("identify");
+        int identify_duration = std::atoi(identify_val.c_str());
+        if (identify_duration == 0) {
+            identify_duration = 5;
+        }
+        UHD_LOG_INFO(unique_id(),
+            "Running LED identification process for " << identify_duration
+            << " seconds.");
+        _identify_with_leds(identify_duration);
+    }
+    // Note: MCR gets set during the init() call (prior to this), which takes
+    // in arguments from the device args. So if block_args contains a
+    // master_clock_rate key, then it should better be whatever the device is
+    // configured to do.
+    _master_clock_rate = _rpcc->request_with_token<double>(
+            _rpc_prefix + "get_master_clock_rate");
+    if (block_args.cast<double>("master_clock_rate", _master_clock_rate)
+            != _master_clock_rate) {
+        throw uhd::runtime_error(str(
+            boost::format("Master clock rate mismatch. Device returns %f MHz, "
+                          "but should have been %f MHz.")
+            % (_master_clock_rate / 1e6)
+            % (block_args.cast<double>(
+                    "master_clock_rate", _master_clock_rate) / 1e6)
+        ));
+
+    }
+    UHD_LOG_DEBUG(unique_id(),
+        "Master Clock Rate is: " << (_master_clock_rate / 1e6) << " MHz.");
+    this->set_rate(_master_clock_rate);
+
+    // Loopback test
+    for (size_t chan = 0; chan < _get_num_radios(); chan++) {
+        loopback_self_test(
+            [this, chan](const uint32_t value){
+                this->sr_write(regs::CODEC_IDLE, value, chan);
+            },
+            [this, chan](){
+                return this->user_reg_read64(regs::RB_CODEC_READBACK, chan);
+            }
+        );
+    }
+
+    const size_t db_idx = get_block_id().get_block_count();
+    _tree->access<eeprom_map_t>(_root_path / "eeprom")
+        .add_coerced_subscriber([this, db_idx](const eeprom_map_t& db_eeprom){
+            this->_rpcc->notify_with_token("set_db_eeprom", db_idx, db_eeprom);
+        })
+        .set_publisher([this, db_idx](){
+            return this->_rpcc->request_with_token<eeprom_map_t>(
+                "get_db_eeprom", db_idx
+            );
+        })
+    ;
+
+    // Init sensors
+    for (const auto &dir : std::vector<direction_t>{RX_DIRECTION, TX_DIRECTION}) {
+        for (size_t chan_idx = 0; chan_idx < NEON_NUM_CHANS; chan_idx++) {
+            _init_mpm_sensors(dir, chan_idx);
+        }
+    }
+}
+
+bool neon_radio_ctrl_impl::get_lo_lock_status(
+    const direction_t dir
+) {
+    if (not (bool(_rpcc))) {
+        UHD_LOG_DEBUG(unique_id(),
+            "Reported no LO lock due to lack of RPC connection.");
+        return false;
+    }
+
+    const std::string trx = (dir == RX_DIRECTION) ? "rx" : "tx";
+    bool lo_lock = _rpcc->request_with_token<bool>(
+        _rpc_prefix + "get_ad9361_lo_lock", trx);
+    UHD_LOG_TRACE(unique_id(),
+        "AD9361 " << trx << " LO reports lock: " << (lo_lock ? "Yes" : "No"));
+
+    return lo_lock;
+}
+
+void neon_radio_ctrl_impl::_set_atr_bits(
+    const size_t chan,
+    const double freq,
+    const std::string &ant
+) {
+
+    const uint32_t rx_regs = _get_rx_switches(chan, freq, ant);
+    const uint32_t tx_regs = _get_tx_switches(chan, freq);
+    const uint32_t idle_regs = TX_AMP_OFF << TX_AMP_SHIFT |
+                        TRX1_SW_TX_HB << TRX_SW_SHIFT |
+                        TX_SW2_LB_80 << TX_SW2_SHIFT |
+                        TX_SW1_LB_80 << TX_SW1_SHIFT |
+                        RX_SW3_OFF << RX_SW3_SHIFT |
+                        RX_SW2_OFF << RX_SW2_SHIFT |
+                        RX_SW1_OFF << RX_SW1_SHIFT;
+
+    _db_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_IDLE, idle_regs);
+    _db_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_RX_ONLY, rx_regs);
+    _db_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_TX_ONLY, tx_regs);
+    _db_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_FULL_DUPLEX, rx_regs | tx_regs);
+
+    // The LED signal names are reversed, but are consistent with the schematic
+    const int idle_led = 0;
+    const bool is_txrx = ant == "TX/RX";
+    const int rx_led = 1 << TRX_LED_GRN_SHIFT;
+    const int tx_led = 1 << TX_LED_RED_SHIFT;
+    const int txrx_led = 1 << RX_LED_GRN_SHIFT;
+
+    _leds_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_IDLE, idle_led);
+    _leds_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_RX_ONLY, is_txrx ? txrx_led : rx_led);
+    _leds_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_TX_ONLY, tx_led);
+    _leds_gpio[chan]->set_atr_reg(usrp::gpio_atr::ATR_REG_FULL_DUPLEX, rx_led | tx_led);
+}
+
+void neon_radio_ctrl_impl::_identify_with_leds(
+    const int identify_duration
+) {
+    auto end_time = std::chrono::steady_clock::now()
+                        + std::chrono::seconds(identify_duration);
+    bool led_state = true;
+    while (std::chrono::steady_clock::now() < end_time) {
+        // Add update_leds
+        led_state = !led_state;
+        std::this_thread::sleep_for(std::chrono::milliseconds(500));
+    }
+}
+
+uint32_t neon_radio_ctrl_impl::_get_tx_switches(
+    const size_t chan,
+    const double freq
+) {
+
+    UHD_LOG_TRACE(unique_id(),
+        "Update all TX freq related switches. f=" << freq << " Hz, "
+    );
+    auto tx_sw1 = TX_SW1_LB_160;
+    auto tx_sw2 = TX_SW2_LB_160;
+    auto trx_sw = (chan == 0) ? TRX1_SW_TX_LB: TRX2_SW_TX_LB;
+    auto tx_amp = TX_AMP_LF_ON;
+
+    const auto band = _map_freq_to_tx_band(freq);
+    switch(band) {
+    case tx_band::LB_80:
+        tx_sw1 = TX_SW1_LB_80;
+        tx_sw2 = TX_SW2_LB_80;
+        break;
+    case tx_band::LB_160:
+        tx_sw1 = TX_SW1_LB_160;
+        tx_sw2 = TX_SW2_LB_160;
+        break;
+    case tx_band::LB_225:
+        tx_sw1 = TX_SW1_LB_225;
+        tx_sw2 = TX_SW2_LB_225;
+        break;
+    case tx_band::LB_400:
+        tx_sw1 = TX_SW1_LB_400;
+        tx_sw2 = TX_SW2_LB_400;
+        break;
+    case tx_band::LB_575:
+        tx_sw1 = TX_SW1_LB_575;
+        tx_sw2 = TX_SW2_LB_575;
+        break;
+    case tx_band::LB_1000:
+        tx_sw1 = TX_SW1_LB_1000;
+        tx_sw2 = TX_SW2_LB_1000;
+        break;
+    case tx_band::LB_1700:
+        tx_sw1 = TX_SW1_LB_1700;
+        tx_sw2 = TX_SW2_LB_1700;
+        break;
+    case tx_band::LB_2750:
+        tx_sw1 = TX_SW1_LB_2750;
+        tx_sw2 = TX_SW2_LB_2750;
+        break;
+    case tx_band::HB:
+        trx_sw = (chan == 0) ? TRX1_SW_TX_HB: TRX2_SW_TX_HB;
+        tx_amp = TX_AMP_HF_ON;
+        break;
+    case tx_band::INVALID_BAND:
+        UHD_LOG_ERROR(unique_id(),
+            "Cannot map TX frequency to band: " << freq);
+        UHD_THROW_INVALID_CODE_PATH();
+        break;
+    }
+
+    auto tx_regs = tx_amp << TX_AMP_SHIFT |
+             trx_sw << TRX_SW_SHIFT |
+             tx_sw2 << TX_SW2_SHIFT |
+             tx_sw1 << TX_SW1_SHIFT;
+    return tx_regs;
+}
+
+uint32_t neon_radio_ctrl_impl::_get_rx_switches(
+    const size_t chan,
+    const double freq,
+    const std::string &ant
+){
+    UHD_LOG_TRACE(unique_id(),
+        "Update all RX freq related switches. f=" << freq << " Hz, "
+    );
+    // Default to OFF
+    auto rx_sw1 = RX_SW1_OFF;
+    auto rx_sw2 = RX_SW2_OFF;
+    auto rx_sw3 = RX_SW3_OFF;
+    auto trx_sw = (chan == 0) ? TRX1_SW_RX: TRX2_SW_RX;
+    if (ant == "TX/RX") {
+        rx_sw3 = RX_SW3_HBRX_LBTRX;
+        trx_sw = (chan == 0) ? TRX1_SW_RX: TRX2_SW_RX;
+    }
+    else if (ant == "RX2") {
+        rx_sw3 = RX_SW3_HBTRX_LBRX;
+        // Set TRX switch to TX when receiving on RX2
+        trx_sw = TRX1_SW_TX_HB;
+    }
+
+    const auto band = _map_freq_to_rx_band(freq);
+    switch(band) {
+    case rx_band::LB_B2:
+        rx_sw1 = RX_SW1_LB_B2;
+        rx_sw2 = RX_SW2_LB_B2;
+        break;
+    case rx_band::LB_B3:
+        rx_sw1 = RX_SW1_LB_B3;
+        rx_sw2 = RX_SW2_LB_B3;
+        break;
+    case rx_band::LB_B4:
+        rx_sw1 = RX_SW1_LB_B4;
+        rx_sw2 = RX_SW2_LB_B4;
+        break;
+    case rx_band::LB_B5:
+        rx_sw1 = RX_SW1_LB_B5;
+        rx_sw2 = RX_SW2_LB_B5;
+        break;
+    case rx_band::LB_B6:
+        rx_sw1 = RX_SW1_LB_B6;
+        rx_sw2 = RX_SW2_LB_B6;
+        break;
+    case rx_band::LB_B7:
+        rx_sw1 = RX_SW1_LB_B7;
+        rx_sw2 = RX_SW2_LB_B7;
+        break;
+    case rx_band::HB:
+        rx_sw1 = RX_SW1_OFF;
+        rx_sw2 = RX_SW2_OFF;
+        if (ant == "TX/RX") {
+            rx_sw3 = RX_SW3_HBTRX_LBRX;
+        }
+        else if (ant == "RX2") {
+            rx_sw3 = RX_SW3_HBRX_LBTRX;
+        }
+        break;
+    case rx_band::INVALID_BAND:
+        UHD_LOG_ERROR(unique_id(),
+            "Cannot map RX frequency to band: " << freq);
+        UHD_THROW_INVALID_CODE_PATH();
+        break;
+    }
+
+    auto rx_regs = trx_sw << TRX_SW_SHIFT |
+             rx_sw3 << RX_SW3_SHIFT |
+             rx_sw2 << RX_SW2_SHIFT |
+             rx_sw1 << RX_SW1_SHIFT;
+    return rx_regs;
+}
+
+UHD_RFNOC_BLOCK_REGISTER(neon_radio_ctrl, "NeonRadio");
diff --git a/host/lib/usrp/dboard/neon/neon_radio_ctrl_impl.hpp b/host/lib/usrp/dboard/neon/neon_radio_ctrl_impl.hpp
new file mode 100644
index 000000000..64b970d54
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_radio_ctrl_impl.hpp
@@ -0,0 +1,311 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#ifndef INCLUDED_LIBUHD_RFNOC_NEON_RADIO_CTRL_IMPL_HPP
+#define INCLUDED_LIBUHD_RFNOC_NEON_RADIO_CTRL_IMPL_HPP
+
+#include "neon_ad9361_iface.hpp"
+#include <uhd/types/serial.hpp>
+#include <uhd/usrp/dboard_manager.hpp>
+#include <uhd/usrp/gpio_defs.hpp>
+#include <uhdlib/usrp/cores/gpio_atr_3000.hpp>
+#include <uhdlib/rfnoc/rpc_block_ctrl.hpp>
+#include <uhdlib/rfnoc/radio_ctrl_impl.hpp>
+#include <mutex>
+
+namespace uhd {
+    namespace rfnoc {
+
+/*! \brief Provide access to an Magnesium radio.
+ */
+class neon_radio_ctrl_impl : public radio_ctrl_impl, public rpc_block_ctrl
+{
+public:
+    typedef boost::shared_ptr<neon_radio_ctrl_impl> sptr;
+
+    //! Frequency bands for RX. Bands are a function of the analog filter banks
+    enum class rx_band {
+        INVALID_BAND,
+        LB_B2,
+        LB_B3,
+        LB_B4,
+        LB_B5,
+        LB_B6,
+        LB_B7,
+        HB
+    };
+
+    //! Frequency bands for TX. Bands are a function of the analog filter banks
+    enum class tx_band {
+        INVALID_BAND,
+        LB_80,
+        LB_160,
+        LB_225,
+        LB_400,
+        LB_575,
+        LB_1000,
+        LB_1700,
+        LB_2750,
+        HB
+    };
+
+    /**************************************************************************
+     * ATR/ Switches Types
+     *************************************************************************/
+    //! ATR state
+    enum atr_state_t {
+        IDLE,
+        RX_ONLY,
+        TX_ONLY,
+        FULL_DUPLEX
+    };
+
+    //! Channel select:
+    enum chan_sel_t {
+        CHAN1,
+        CHAN2,
+        BOTH
+    };
+
+    enum tx_sw1_t {
+        TX_SW1_LB_80 = 3,
+        TX_SW1_LB_160 = 7,
+        TX_SW1_LB_225 = 1,
+        TX_SW1_LB_400 = 5,
+        TX_SW1_LB_575 = 2,
+        TX_SW1_LB_1000 = 6,
+        TX_SW1_LB_1700 = 0,
+        TX_SW1_LB_2750 = 4
+    };
+
+    enum tx_sw2_t {
+        TX_SW2_LB_80 = 7,
+        TX_SW2_LB_160 = 3,
+        TX_SW2_LB_225 = 5,
+        TX_SW2_LB_400 = 1,
+        TX_SW2_LB_575 = 6,
+        TX_SW2_LB_1000 = 2,
+        TX_SW2_LB_1700 = 4,
+        TX_SW2_LB_2750 = 0
+    };
+
+    enum trx_sw_t {
+        TRX1_SW_TX_HB = 2,
+        TRX1_SW_TX_LB = 1,
+        TRX1_SW_RX = 4,
+        TRX2_SW_TX_HB = 2,
+        TRX2_SW_TX_LB = 4,
+        TRX2_SW_RX = 1
+    };
+
+    enum rx_sw1_t {
+        RX_SW1_LB_B2 = 4,
+        RX_SW1_LB_B3 = 5,
+        RX_SW1_LB_B4 = 2,
+        RX_SW1_LB_B5 = 3,
+        RX_SW1_LB_B6 = 0,
+        RX_SW1_LB_B7 = 1,
+        RX_SW1_OFF = 7
+
+    };
+
+    enum rx_sw2_t {
+        RX_SW2_LB_B2 = 5,
+        RX_SW2_LB_B3 = 4,
+        RX_SW2_LB_B4 = 3,
+        RX_SW2_LB_B5 = 2,
+        RX_SW2_LB_B6 = 1,
+        RX_SW2_LB_B7 = 0,
+        RX_SW2_OFF = 7
+    };
+
+    enum rx_sw3_t {
+        RX_SW3_HBRX_LBTRX = 1,
+        RX_SW3_HBTRX_LBRX = 2,
+        RX_SW3_OFF = 0 //or 3
+    };
+
+    enum tx_amp_t {
+        TX_AMP_HF_ON = 1,
+        TX_AMP_LF_ON = 2,
+        TX_AMP_OFF = 3
+    };
+
+    /************************************************************************
+     * Structors
+     ***********************************************************************/
+    UHD_RFNOC_RADIO_BLOCK_CONSTRUCTOR_DECL(neon_radio_ctrl)
+    virtual ~neon_radio_ctrl_impl();
+
+    /************************************************************************
+     * API calls
+     ***********************************************************************/
+    // Note: We use the cached values in radio_ctrl_impl, so most getters are
+    // not reimplemented here
+
+    virtual bool check_radio_config();
+
+    //! Set which channel mode is used
+    void set_channel_mode(const std::string &channel_mode);
+
+    //! Set streaming mode - active chains, channel_mode, timing_mode
+    void set_streaming_mode(const bool tx1, const bool tx2, const bool rx1, const bool rx2);
+
+    /*! Run a loopback self test.
+     *
+     * This will write data to the AD936x and read it back again.
+     * If this test fails, it generally means the interface is broken,
+     * so we assume it passes and throw otherwise. Running this requires
+     * a core that we can peek and poke the loopback values into.
+     *
+     * \param iface An interface to the associated radio control core
+     * \param iface The radio control core's address to write the loopback value
+     * \param iface The radio control core's readback address to read back the returned value
+     *
+     * \throws a uhd::runtime_error if the loopback value didn't match.
+     */
+    void loopback_self_test(
+            std::function<void(uint32_t)> poker_functor,
+            std::function<uint64_t()> peeker_functor
+    );
+
+    double set_rate(const double rate);
+
+    void set_tx_antenna(const std::string &ant, const size_t chan);
+    void set_rx_antenna(const std::string &ant, const size_t chan);
+
+    double set_tx_frequency(const double freq, const size_t chan);
+    double set_rx_frequency(const double freq, const size_t chan);
+    double set_tx_bandwidth(const double bandwidth, const size_t chan);
+    double set_rx_bandwidth(const double bandwidth, const size_t chan);
+
+    // gain
+    double set_tx_gain(const double gain, const size_t chan);
+    double set_rx_gain(const double gain, const size_t chan);
+
+    size_t get_chan_from_dboard_fe(const std::string &fe, const direction_t dir);
+    std::string get_dboard_fe_from_chan(const size_t chan, const direction_t dir);
+
+    void set_rpc_client(
+        uhd::rpc_client::sptr rpcc,
+        const uhd::device_addr_t &block_args
+    );
+
+private:
+    /**************************************************************************
+     * Helpers
+     *************************************************************************/
+    //! Initialize all the peripherals connected to this block
+    void _init_peripherals();
+
+    //! Set state of this class to sensible defaults
+    void _init_defaults();
+
+    //! Init a subtree for the RF frontends
+    void _init_frontend_subtree(
+        uhd::property_tree::sptr subtree,
+        const size_t chan_idx
+    );
+
+    //! Initialize Catalina defaults
+    void _init_codec();
+
+    //! Initialize property tree
+    void _init_prop_tree();
+
+    void _init_mpm_sensors(
+        const direction_t dir,
+        const size_t chan_idx
+    );
+
+    //! Map a frequency in Hz to an rx_band value. Will return
+    //  rx_band::INVALID_BAND if the frequency is out of range.
+    rx_band _map_freq_to_rx_band(const double freq);
+    //! Map a frequency in Hz to an tx_band value. Will return
+    //  tx_band::INVALID_BAND if the frequency is out of range.
+    tx_band _map_freq_to_tx_band(const double freq);
+
+    /*************************************************************************
+     * Sensors
+     *************************************************************************/
+    //! Return LO lock status. Factors in current band (low/high) and
+    // direction (TX/RX)
+    bool get_lo_lock_status(
+            const direction_t dir
+    );
+
+    /**************************************************************************
+     * Misc Controls
+     *************************************************************************/
+    //! Blink the front-panel LEDs for \p identify_duration,
+    //  and resume normal operation.
+    void _identify_with_leds(
+        const int identify_duration
+    );
+
+    uint32_t _get_rx_switches(
+        const size_t chan,
+        const double freq,
+        const std::string &ant
+    );
+
+    uint32_t _get_tx_switches(
+        const size_t chan,
+        const double freq
+    );
+
+    void _set_atr_bits(
+        const size_t chan,
+        const double freq,
+        const std::string &ant
+    );
+
+    /**************************************************************************
+     * Private attributes
+     *************************************************************************/
+    //! Locks access to setter APIs
+    std::mutex _set_lock;
+
+    //! Letter representation of the radio we're currently running
+    std::string _radio_slot;
+
+    //! Prepended for all dboard RPC calls
+    std::string _rpc_prefix;
+
+    //! Additional block args; gets set during set_rpc_client()
+    uhd::device_addr_t _block_args;
+
+    //! Reference to the RPC client
+    uhd::rpc_client::sptr _rpcc;
+
+    //! Reference to the SPI core
+    uhd::spi_iface::sptr _spi;
+
+    //! Reference to the AD9361 controls
+    //neon_ad9361_iface::uptr _ad9361;
+    ad9361_ctrl::sptr _ad9361;
+
+    //! ATR controls. These control the AD9361 gain
+    //  up/down bits.
+    //  Every radio channel gets its own ATR state register.
+    std::vector<usrp::gpio_atr::gpio_atr_3000::sptr> _db_gpio;
+
+    // ATR controls for LEDs
+    std::vector<usrp::gpio_atr::gpio_atr_3000::sptr> _leds_gpio;
+
+    //! Front panel GPIO controller. Note that only one radio block per
+    //  module can be the FP-GPIO master.
+    usrp::gpio_atr::gpio_atr_3000::sptr _fp_gpio;
+
+    //! Sampling rate
+    double _master_clock_rate = 1.0;
+}; /* class radio_ctrl_impl */
+
+}} /* namespace uhd::rfnoc */
+
+#endif /* INCLUDED_LIBUHD_RFNOC_NEON_RADIO_CTRL_IMPL_HPP */
+// vim: sw=4 et:
+
diff --git a/host/lib/usrp/dboard/neon/neon_radio_ctrl_init.cpp b/host/lib/usrp/dboard/neon/neon_radio_ctrl_init.cpp
new file mode 100644
index 000000000..9c2396f2d
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_radio_ctrl_init.cpp
@@ -0,0 +1,495 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#include "neon_radio_ctrl_impl.hpp"
+#include "neon_constants.hpp"
+#include <uhd/utils/log.hpp>
+#include <uhd/types/eeprom.hpp>
+#include <uhd/types/sensors.hpp>
+#include <uhd/transport/chdr.hpp>
+#include <boost/algorithm/string.hpp>
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/case_conv.hpp>
+#include <vector>
+#include <string>
+
+using namespace uhd;
+using namespace uhd::rfnoc;
+
+//! Helper function to extract single value of port number.
+//
+// Each GPIO pins can be controlled by each radio output ports.
+// This function convert the format of attribute "Radio_N_M"
+// to a single value port number = N*number_of_port_per_radio + M
+
+uint32_t _extract_port_number(std::string radio_src_string, uhd::property_tree::sptr ptree){
+    std::string s_val = "0";
+    std::vector<std::string> radio_strings;
+    boost::algorithm::split(
+        radio_strings,
+        radio_src_string,
+        boost::is_any_of("_/"),
+        boost::token_compress_on);
+    boost::to_lower(radio_strings[0]);
+    if (radio_strings.size()<3) {
+        throw uhd::runtime_error(str(boost::format("%s is an invalid GPIO source string.") % radio_src_string));
+    }
+    size_t radio_num = std::stoi(radio_strings[1]);
+    size_t port_num = std::stoi(radio_strings[2]);
+    if (radio_strings[0] != "radio") {
+        throw uhd::runtime_error("Front panel GPIO bank can only accept a radio block as its driver.");
+    }
+    std::string radio_port_out = "Radio_"+  radio_strings[1] + "/ports/out";
+    std::string radio_port_path = radio_port_out + "/"+ radio_strings[2];
+    auto found = ptree->exists(fs_path("xbar")/ radio_port_path);
+    if (not found){
+        throw uhd::runtime_error(str(boost::format(
+                    "Could not find radio port %s.\n") % radio_port_path));
+    }
+    size_t port_size = ptree->list(fs_path("xbar")/ radio_port_out).size();
+    return radio_num*port_size + port_num;
+}
+
+void neon_radio_ctrl_impl::_init_defaults()
+{
+    UHD_LOG_TRACE(unique_id(), "Initializing defaults...");
+    const size_t num_rx_chans = get_output_ports().size();
+    const size_t num_tx_chans = get_input_ports().size();
+
+    UHD_LOG_TRACE(unique_id(),
+            "Num TX chans: " << num_tx_chans
+            << " Num RX chans: " << num_rx_chans);
+
+    for (size_t chan = 0; chan < num_rx_chans; chan++) {
+        radio_ctrl_impl::set_rx_frequency(NEON_DEFAULT_FREQ, chan);
+        radio_ctrl_impl::set_rx_gain(NEON_DEFAULT_GAIN, chan);
+        radio_ctrl_impl::set_rx_antenna(NEON_DEFAULT_RX_ANTENNA, chan);
+        radio_ctrl_impl::set_rx_bandwidth(NEON_DEFAULT_BANDWIDTH, chan);
+    }
+
+    for (size_t chan = 0; chan < num_tx_chans; chan++) {
+        radio_ctrl_impl::set_tx_frequency(NEON_DEFAULT_FREQ, chan);
+        radio_ctrl_impl::set_tx_gain(NEON_DEFAULT_GAIN, chan);
+        radio_ctrl_impl::set_tx_antenna(NEON_DEFAULT_TX_ANTENNA, chan);
+    }
+
+    /** Update default SPP (overwrites the default value from the XML file) **/
+    const size_t max_bytes_header =
+        uhd::transport::vrt::chdr::max_if_hdr_words64 * sizeof(uint64_t);
+    const size_t default_spp =
+        (_tree->access<size_t>("mtu/recv").get() - max_bytes_header)
+        / (2 * sizeof(int16_t));
+    UHD_LOG_DEBUG(unique_id(),
+        "Setting default spp to " << default_spp);
+    _tree->access<int>(get_arg_path("spp") / "value").set(default_spp);
+}
+
+void neon_radio_ctrl_impl::_init_peripherals()
+{
+    UHD_LOG_TRACE(unique_id(), "Initializing peripherals...");
+
+   _db_gpio.clear(); // Following the as-if rule, this can get optimized out
+    for (size_t radio_idx = 0; radio_idx < _get_num_radios(); radio_idx++) {
+        UHD_LOG_TRACE(unique_id(),
+            "Initializing GPIOs for channel " << radio_idx);
+        _db_gpio.emplace_back(
+            usrp::gpio_atr::gpio_atr_3000::make_write_only(
+                _get_ctrl(radio_idx),
+                regs::sr_addr(regs::GPIO)
+            )
+        );
+        _db_gpio[radio_idx]->set_atr_mode(usrp::gpio_atr::MODE_ATR, usrp::gpio_atr::gpio_atr_3000::MASK_SET_ALL);
+    }
+   _leds_gpio.clear(); // Following the as-if rule, this can get optimized out
+    for (size_t radio_idx = 0; radio_idx < _get_num_radios(); radio_idx++) {
+        UHD_LOG_TRACE(unique_id(),
+            "Initializing GPIOs for channel " << radio_idx);
+        _leds_gpio.emplace_back(
+            usrp::gpio_atr::gpio_atr_3000::make_write_only(
+                _get_ctrl(radio_idx),
+                regs::sr_addr(regs::LEDS)
+            )
+        );
+
+        _leds_gpio[radio_idx]->set_atr_mode(usrp::gpio_atr::MODE_ATR, usrp::gpio_atr::gpio_atr_3000::MASK_SET_ALL);
+    }
+    UHD_LOG_TRACE(unique_id(), "Initializing front-panel GPIO control...")
+    _fp_gpio = usrp::gpio_atr::gpio_atr_3000::make(
+            _get_ctrl(0), regs::sr_addr(regs::FP_GPIO), regs::RB_FP_GPIO);
+}
+
+void neon_radio_ctrl_impl::_init_frontend_subtree(
+    uhd::property_tree::sptr subtree,
+    const size_t chan_idx
+) {
+    const fs_path tx_fe_path = fs_path("tx_frontends") / chan_idx;
+    const fs_path rx_fe_path = fs_path("rx_frontends") / chan_idx;
+    UHD_LOG_TRACE(unique_id(),
+        "Adding non-RFNoC block properties for channel " << chan_idx <<
+        " to prop tree path " << tx_fe_path << " and " << rx_fe_path);
+    // TX Standard attributes
+    subtree->create<std::string>(tx_fe_path / "name")
+        .set(str(boost::format("Neon")))
+    ;
+    subtree->create<std::string>(tx_fe_path / "connection")
+        .set("IQ")
+    ;
+    // RX Standard attributes
+    subtree->create<std::string>(rx_fe_path / "name")
+        .set(str(boost::format("Neon")))
+    ;
+    subtree->create<std::string>(rx_fe_path / "connection")
+        .set("IQ")
+    ;
+    // TX Antenna
+    subtree->create<std::string>(tx_fe_path / "antenna" / "value")
+        .add_coerced_subscriber([this, chan_idx](const std::string &ant){
+            this->set_tx_antenna(ant, chan_idx);
+        })
+        .set_publisher([this, chan_idx](){
+            return this->get_tx_antenna(chan_idx);
+        })
+    ;
+    subtree->create<std::vector<std::string>>(tx_fe_path / "antenna" / "options")
+        .set({NEON_DEFAULT_TX_ANTENNA})
+        .add_coerced_subscriber([](const std::vector<std::string> &){
+            throw uhd::runtime_error(
+                    "Attempting to update antenna options!");
+        })
+    ;
+    // RX Antenna
+    subtree->create<std::string>(rx_fe_path / "antenna" / "value")
+        .add_coerced_subscriber([this, chan_idx](const std::string &ant){
+            this->set_rx_antenna(ant, chan_idx);
+        })
+        .set_publisher([this, chan_idx](){
+            return this->get_rx_antenna(chan_idx);
+        })
+    ;
+    subtree->create<std::vector<std::string>>(rx_fe_path / "antenna" / "options")
+        .set(NEON_RX_ANTENNAS)
+        .add_coerced_subscriber([](const std::vector<std::string> &){
+            throw uhd::runtime_error(
+                "Attempting to update antenna options!");
+        })
+    ;
+    // TX frequency
+    subtree->create<double>(tx_fe_path / "freq" / "value")
+        .set_coercer([this, chan_idx](const double freq){
+            return this->set_tx_frequency(freq, chan_idx);
+        })
+        .set_publisher([this, chan_idx](){
+            return this->get_tx_frequency(chan_idx);
+        })
+    ;
+    subtree->create<meta_range_t>(tx_fe_path / "freq" / "range")
+        .set(meta_range_t(AD9361_MIN_FREQ, AD9361_MAX_FREQ, 1.0))
+        .add_coerced_subscriber([](const meta_range_t &){
+            throw uhd::runtime_error(
+                "Attempting to update freq range!");
+        })
+    ;
+    // RX frequency
+    subtree->create<double>(rx_fe_path / "freq" / "value")
+        .set_coercer([this, chan_idx](const double freq){
+            return this->set_rx_frequency(freq, chan_idx);
+        })
+        .set_publisher([this, chan_idx](){
+            return this->get_rx_frequency(chan_idx);
+        })
+    ;
+    subtree->create<meta_range_t>(rx_fe_path / "freq" / "range")
+        .set(meta_range_t(AD9361_MIN_FREQ, AD9361_MAX_FREQ, 1.0))
+        .add_coerced_subscriber([](const meta_range_t &){
+            throw uhd::runtime_error(
+                "Attempting to update freq range!");
+        })
+    ;
+    // TX bandwidth
+    subtree->create<double>(tx_fe_path / "bandwidth" / "value")
+        .set(AD9361_TX_MAX_BANDWIDTH)
+        .set_coercer([this, chan_idx](const double bw){
+            return this->set_tx_bandwidth(bw, chan_idx);
+        })
+        .set_publisher([this, chan_idx](){
+            return this->get_tx_bandwidth(chan_idx);
+        })
+    ;
+    subtree->create<meta_range_t>(tx_fe_path / "bandwidth" / "range")
+        .set(meta_range_t(AD9361_TX_MIN_BANDWIDTH, AD9361_TX_MAX_BANDWIDTH))
+        .add_coerced_subscriber([](const meta_range_t &){
+            throw uhd::runtime_error(
+                "Attempting to update bandwidth range!");
+        })
+    ;
+    // RX bandwidth
+    subtree->create<double>(rx_fe_path / "bandwidth" / "value")
+        .set(AD9361_RX_MAX_BANDWIDTH)
+        .set_coercer([this, chan_idx](const double bw){
+            return this->set_rx_bandwidth(bw, chan_idx);
+        })
+    ;
+    subtree->create<meta_range_t>(rx_fe_path / "bandwidth" / "range")
+        .set(meta_range_t(AD9361_RX_MIN_BANDWIDTH, AD9361_RX_MAX_BANDWIDTH))
+        .add_coerced_subscriber([](const meta_range_t &){
+            throw uhd::runtime_error(
+                "Attempting to update bandwidth range!");
+        })
+    ;
+
+    // TX gains
+    const std::vector<std::string> tx_gain_names = ad9361_ctrl::get_gain_names("TX1");
+    for (auto tx_gain_name : tx_gain_names) {
+        subtree->create<double>(tx_fe_path / "gains" / tx_gain_name / "value")
+            .set_coercer([this, chan_idx](const double gain){
+                return this->set_tx_gain(gain, chan_idx);
+            })
+            .set_publisher([this, chan_idx](){
+                return radio_ctrl_impl::get_tx_gain(chan_idx);
+            })
+        ;
+        subtree->create<meta_range_t>(tx_fe_path / "gains" / tx_gain_name / "range")
+            .add_coerced_subscriber([](const meta_range_t &){
+                throw uhd::runtime_error(
+                    "Attempting to update gain range!");
+            })
+            .set_publisher([this](){
+            return meta_range_t(
+                AD9361_MIN_TX_GAIN,
+                AD9361_MAX_TX_GAIN,
+                AD9361_TX_GAIN_STEP
+            );
+            })
+        ;
+    }
+
+    // RX gains
+    const std::vector<std::string> rx_gain_names = ad9361_ctrl::get_gain_names("RX1");
+    for (auto rx_gain_name : rx_gain_names) {
+        subtree->create<double>(rx_fe_path / "gains" / rx_gain_name / "value")
+            .set_coercer([this, chan_idx](const double gain){
+                return this->set_rx_gain(gain, chan_idx);
+            })
+            .set_publisher([this, chan_idx](){
+                return radio_ctrl_impl::get_rx_gain(chan_idx);
+            })
+        ;
+
+        subtree->create<meta_range_t>(rx_fe_path / "gains" / rx_gain_name / "range")
+            .add_coerced_subscriber([](const meta_range_t &){
+                throw uhd::runtime_error(
+                    "Attempting to update gain range!");
+            })
+            .set_publisher([this](){
+                return meta_range_t(
+                    AD9361_MIN_RX_GAIN,
+                    AD9361_MAX_RX_GAIN,
+                    AD9361_RX_GAIN_STEP
+                );
+            })
+        ;
+    }
+
+    // TX LO lock sensor //////////////////////////////////////////////////////
+    // Note: The AD9361 LO lock sensors are generated programmatically in
+    // set_rpc_client(). The actual lo_locked publisher is also set there.
+    subtree->create<sensor_value_t>(tx_fe_path / "sensors" / "lo_locked")
+        .set(sensor_value_t("all_los", false,  "locked", "unlocked"))
+        .add_coerced_subscriber([](const sensor_value_t &){
+            throw uhd::runtime_error(
+                "Attempting to write to sensor!");
+        })
+        .set_publisher([this](){
+            return sensor_value_t(
+                "all_los",
+                this->get_lo_lock_status(TX_DIRECTION),
+                "locked", "unlocked"
+            );
+        })
+    ;
+    // RX LO lock sensor (see not on TX LO lock sensor)
+    subtree->create<sensor_value_t>(rx_fe_path / "sensors" / "lo_locked")
+        .set(sensor_value_t("all_los", false,  "locked", "unlocked"))
+        .add_coerced_subscriber([](const sensor_value_t &){
+            throw uhd::runtime_error(
+                "Attempting to write to sensor!");
+        })
+        .set_publisher([this](){
+            return sensor_value_t(
+                "all_los",
+                this->get_lo_lock_status(RX_DIRECTION),
+                "locked", "unlocked"
+            );
+        })
+    ;
+}
+
+void neon_radio_ctrl_impl::_init_prop_tree()
+{
+    const fs_path fe_base = fs_path("dboards") / _radio_slot;
+    for (size_t chan_idx = 0; chan_idx < NEON_NUM_CHANS; chan_idx++) {
+        this->_init_frontend_subtree(
+            _tree->subtree(fe_base), chan_idx);
+    }
+
+    _tree->create<eeprom_map_t>(_root_path / "eeprom")
+        .set(eeprom_map_t());
+
+    _tree->create<int>("rx_codecs" / _radio_slot / "gains");
+    _tree->create<int>("tx_codecs" / _radio_slot / "gains");
+    _tree->create<std::string>("rx_codecs" / _radio_slot / "name").set("AD9361 Dual ADC");
+    _tree->create<std::string>("tx_codecs" / _radio_slot / "name").set("AD9361 Dual DAC");
+
+    if (not _tree->exists("tick_rate")) {
+        _tree->create<double>("tick_rate")
+            .set_coercer([this](double tick_rate){
+                return this->set_rate(tick_rate);
+            })
+            .set_publisher([this](){
+                return this->get_rate();
+            })
+        ;
+    } else {
+        UHD_LOG_WARNING(unique_id(), "Cannot set tick_rate again");
+    }
+
+    // *****FP_GPIO************************
+    for(const auto& attr:  usrp::gpio_atr::gpio_attr_map) {
+        if (not _tree->exists(fs_path("gpio") / "FP0" / attr.second)){
+            switch (attr.first){
+                case usrp::gpio_atr::GPIO_SRC:
+                    //FIXME:  move this creation of this branch of ptree out side of radio impl;
+                    // since there's no data dependency between radio and SRC setting for FP0
+                    _tree->create<std::vector<std::string>>(fs_path("gpio") / "FP0" / attr.second)
+                         .set(std::vector<std::string>(
+                            32,
+                            usrp::gpio_atr::default_attr_value_map.at(attr.first)))
+                         .add_coerced_subscriber([this, attr](
+                            const std::vector<std::string> str_val){
+                            uint32_t radio_src_value = 0;
+                            uint32_t master_value = 0;
+                            for(size_t i = 0 ; i<str_val.size(); i++){
+                                if(str_val[i] == "PS"){
+                                    master_value += 1<<i;;
+                                }else{
+                                    auto port_num = _extract_port_number(str_val[i],_tree);
+                                    radio_src_value =(1<<(2*i))*port_num + radio_src_value;
+                                }
+                            }
+                            _rpcc->notify_with_token("set_fp_gpio_master", master_value);
+                            _rpcc->notify_with_token("set_fp_gpio_radio_src", radio_src_value);
+                         });
+                         break;
+                case usrp::gpio_atr::GPIO_CTRL:
+                case usrp::gpio_atr::GPIO_DDR:
+                    _tree->create<std::vector<std::string>>(fs_path("gpio") / "FP0" / attr.second)
+                         .set(std::vector<std::string>(
+                            32,
+                            usrp::gpio_atr::default_attr_value_map.at(attr.first)))
+                         .add_coerced_subscriber([this, attr](
+                             const std::vector<std::string> str_val){
+                            uint32_t val = 0;
+                            for(size_t i = 0 ; i < str_val.size() ; i++){
+                                val += usrp::gpio_atr::gpio_attr_value_pair.at(attr.second).at(str_val[i])<<i;
+                            }
+                            _fp_gpio->set_gpio_attr(attr.first, val);
+                         });
+                    break;
+                case usrp::gpio_atr::GPIO_READBACK:{
+                    _tree->create<uint32_t>(fs_path("gpio") / "FP0" / attr.second)
+                        .set_publisher([this](){
+                            return _fp_gpio->read_gpio();
+                        }
+                    );
+                }
+                    break;
+                default:
+                    _tree->create<uint32_t>(fs_path("gpio") / "FP0" / attr.second)
+                         .set(0)
+                         .add_coerced_subscriber([this, attr](const uint32_t val){
+                             _fp_gpio->set_gpio_attr(attr.first, val);
+                         });
+            }
+        }else{
+            switch (attr.first){
+                case usrp::gpio_atr::GPIO_SRC:
+                break;
+                case usrp::gpio_atr::GPIO_CTRL:
+                case usrp::gpio_atr::GPIO_DDR:
+                    _tree->access<std::vector<std::string>>(fs_path("gpio") / "FP0" / attr.second)
+                         .set(std::vector<std::string>(32, usrp::gpio_atr::default_attr_value_map.at(attr.first)))
+                         .add_coerced_subscriber([this, attr](const std::vector<std::string> str_val){
+                            uint32_t val = 0;
+                            for(size_t i = 0 ; i < str_val.size() ; i++){
+                                val += usrp::gpio_atr::gpio_attr_value_pair.at(attr.second).at(str_val[i])<<i;
+                            }
+                            _fp_gpio->set_gpio_attr(attr.first, val);
+                         });
+                    break;
+                case usrp::gpio_atr::GPIO_READBACK:
+                    break;
+                default:
+                    _tree->access<uint32_t>(fs_path("gpio") / "FP0" / attr.second)
+                         .set(0)
+                         .add_coerced_subscriber([this, attr](const uint32_t val){
+                             _fp_gpio->set_gpio_attr(attr.first, val);
+                         });
+            }
+        }
+    }
+}
+
+void neon_radio_ctrl_impl::_init_codec()
+{
+    for (size_t chan = 0; chan < _get_num_radios(); chan++) {
+        std::string rx_fe = get_which_ad9361_chain(RX_DIRECTION, chan);
+        this->set_rx_gain(NEON_DEFAULT_GAIN, chan);
+        this->set_rx_frequency(NEON_DEFAULT_FREQ, chan);
+        this->set_rx_antenna(NEON_DEFAULT_RX_ANTENNA, chan);
+        this->set_rx_bandwidth(NEON_DEFAULT_BANDWIDTH, chan);
+        _ad9361->set_dc_offset_auto(rx_fe, NEON_DEFAULT_AUTO_DC_OFFSET);
+        _ad9361->set_iq_balance_auto(rx_fe, NEON_DEFAULT_AUTO_IQ_BALANCE);
+        _ad9361->set_agc(rx_fe, NEON_DEFAULT_AGC_ENABLE);
+        std::string tx_fe = get_which_ad9361_chain(TX_DIRECTION, chan);
+        this->set_tx_gain(NEON_DEFAULT_GAIN, chan);
+        this->set_tx_frequency(NEON_DEFAULT_FREQ, chan);
+        this->set_tx_bandwidth(NEON_DEFAULT_BANDWIDTH, chan);
+    }
+}
+
+void neon_radio_ctrl_impl::_init_mpm_sensors(
+        const direction_t dir,
+        const size_t chan_idx
+) {
+    const std::string trx = (dir == RX_DIRECTION) ? "RX" : "TX";
+    const fs_path fe_path =
+        fs_path("dboards") / _radio_slot /
+        (dir == RX_DIRECTION ? "rx_frontends" : "tx_frontends") / chan_idx;
+    auto sensor_list =
+        _rpcc->request_with_token<std::vector<std::string>>(
+                this->_rpc_prefix + "get_sensors", trx);
+    UHD_LOG_TRACE(unique_id(),
+        "Chan " << chan_idx << ": Found "
+        << sensor_list.size() << " " << trx << " sensors.");
+    for (const auto &sensor_name : sensor_list) {
+        UHD_LOG_TRACE(unique_id(),
+            "Adding " << trx << " sensor " << sensor_name);
+        _tree->create<sensor_value_t>(fe_path / "sensors" / sensor_name)
+            .add_coerced_subscriber([](const sensor_value_t &){
+                throw uhd::runtime_error(
+                    "Attempting to write to sensor!");
+            })
+            .set_publisher([this, trx, sensor_name, chan_idx](){
+                return sensor_value_t(
+                    this->_rpcc->request_with_token<sensor_value_t::sensor_map_t>(
+                        this->_rpc_prefix + "get_sensor",
+                            trx, sensor_name, chan_idx)
+                );
+            })
+        ;
+    }
+}
+
diff --git a/host/lib/usrp/dboard/neon/neon_regs.hpp b/host/lib/usrp/dboard/neon/neon_regs.hpp
new file mode 100644
index 000000000..39ceca01c
--- /dev/null
+++ b/host/lib/usrp/dboard/neon/neon_regs.hpp
@@ -0,0 +1,26 @@
+//
+// Copyright 2018 Ettus Research, a National Instruments Company
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+//
+
+#ifndef INCLUDED_NEON_REGS_HPP
+#define INCLUDED_NEON_REGS_HPP
+
+#include <uhd/config.hpp>
+#include <cstdint>
+
+static const uint32_t TX_AMP_SHIFT  = 17;
+static const uint32_t TRX_SW_SHIFT  = 14;
+static const uint32_t RX_SW1_SHIFT  = 0;
+static const uint32_t RX_SW2_SHIFT  = 3;
+static const uint32_t RX_SW3_SHIFT  = 6;
+static const uint32_t TX_SW1_SHIFT  = 8;
+static const uint32_t TX_SW2_SHIFT  = 11;
+
+static const uint32_t TRX_LED_GRN_SHIFT  = 0;
+static const uint32_t TX_LED_RED_SHIFT  = 1;
+static const uint32_t RX_LED_GRN_SHIFT  = 2;
+
+#endif /* INCLUDED_NEON_REGS_HPP */
+