mg: Add static gain tables and -support

- Adds two new compilation units (magnesium_gain_table.* and
  magnesium_radio_ctrl_gain.cpp)
- Static gain tables are hard-coded in that file, includes method to
  look up gain table entries for a given frequency and gain
- DSA code moved back to accept attenuation
- TX/RX switch code needed update to enable bypass for certain gains

1 files changed, 25 insertions, 12 deletions

diff --git a/host/lib/usrp/dboard/magnesium/magnesium_radio_ctrl_impl.hpp b/host/lib/usrp/dboard/magnesium/magnesium_radio_ctrl_impl.hpp
index 75a91d0b4..c8597fdf7 100644
--- a/host/lib/usrp/dboard/magnesium/magnesium_radio_ctrl_impl.hpp
+++ b/host/lib/usrp/dboard/magnesium/magnesium_radio_ctrl_impl.hpp
@@ -123,19 +123,29 @@ private:
     /**************************************************************************
      * Gain Controls (implemented in magnesium_radio_ctrl_gain.cpp)
      *************************************************************************/
-    double _dsa_set_gain(
-            const double gain,
+    //! Set the attenuation of the DSA
+    double _dsa_set_att(
+            const double att,
             const size_t chan,
             const direction_t dir
     );
 
-    double _dsa_get_gain(
+    double _dsa_get_att(
             const size_t chan,
             const direction_t dir
     );
 
+    //! Write the DSA word
+    void _set_dsa_val(
+            const size_t chan,
+            const direction_t dir,
+            const uint32_t dsa_val
+    );
+
+
     double _set_all_gain(
         const double gain,
+        const double freq,
         const size_t chan,
         const direction_t dir
     );
@@ -145,22 +155,18 @@ private:
         const direction_t dir
     );
 
-    void _set_dsa_val(
-            const size_t chan,
-            const direction_t dir,
-            const uint32_t dsa_val
-    );
-
     /**************************************************************************
      * CPLD Controls (implemented in magnesium_radio_ctrl_cpld.cpp)
      *************************************************************************/
     void _update_rx_freq_switches(
         const double freq,
+        const bool bypass_lnas,
         const size_t chan
     );
 
     void _update_tx_freq_switches(
         const double freq,
+        const bool bypass_amps,
         const size_t chan
     );
 
@@ -212,15 +218,22 @@ private:
     //! 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;
+
     //! AD9371 gain
     double _ad9371_rx_gain = 0.0;
     double _ad9371_tx_gain = 0.0;
-    //! DSA gain
-    double _dsa_rx_gain = 0.0;
-    double _dsa_tx_gain = 0.0;
+
+    //! DSA attenuation
+    double _dsa_rx_att = 0.0;
+    double _dsa_tx_att = 0.0;
+
     //! All gain
     double _all_rx_gain = 0.0;
     double _all_tx_gain = 0.0;
+
+    bool _rx_bypass_lnas = true;
+    bool _tx_bypass_amp  = true;
+
     //! TRX switch state of 2 channels
     std::map<magnesium_cpld_ctrl::chan_sel_t, magnesium_cpld_ctrl::sw_trx_t> _sw_trx = {
         {magnesium_cpld_ctrl::CHAN1,