From 029e29e24b071e0f316ca74c6d1ff614acc23e19 Mon Sep 17 00:00:00 2001
From: Martin Braun <martin.braun@ettus.com>
Date: Thu, 9 Aug 2018 16:42:08 -0500
Subject: b200: Enable access to user regs via the 'enable_user_regs' arg

---
 host/lib/usrp/b200/b200_impl.cpp | 28 ++++++++++++++++++++++++----
 host/lib/usrp/b200/b200_impl.hpp |  5 +++++
 host/lib/usrp/b200/b200_regs.hpp |  2 ++
 3 files changed, 31 insertions(+), 4 deletions(-)

(limited to 'host/lib')

diff --git a/host/lib/usrp/b200/b200_impl.cpp b/host/lib/usrp/b200/b200_impl.cpp
index a173c68f8..ae6e0b0d7 100644
--- a/host/lib/usrp/b200/b200_impl.cpp
+++ b/host/lib/usrp/b200/b200_impl.cpp
@@ -276,6 +276,7 @@ UHD_STATIC_BLOCK(register_b200_device)
 b200_impl::b200_impl(const uhd::device_addr_t& device_addr, usb_device_handle::sptr &handle) :
     _product(B200), // Some safe value
     _revision(0),
+    _enable_user_regs(device_addr.has_key("enable_user_regs")),
     _time_source(UNKNOWN),
     _tick_rate(0.0) // Forces a clock initialization at startup
 {
@@ -836,6 +837,18 @@ void b200_impl::setup_radio(const size_t dspno)
     perif.duc = tx_dsp_core_3000::make(perif.ctrl, TOREG(SR_TX_DSP));
     perif.duc->set_link_rate(10e9/8); //whatever
     perif.duc->set_freq(tx_dsp_core_3000::DEFAULT_CORDIC_FREQ);
+    if (_enable_user_regs) {
+        UHD_LOG_DEBUG("B200", "Enabling user settings registers");
+        perif.user_settings = user_settings_core_3000::make(perif.ctrl,
+            TOREG(SR_USER_SR_BASE),
+            TOREG(SR_USER_RB_ADDR)
+        );
+        if (!perif.user_settings) {
+            const std::string error_msg = "Failed to create user settings bus!";
+            UHD_LOG_ERROR("B200", error_msg);
+            throw uhd::runtime_error(error_msg);
+        }
+    }
 
     ////////////////////////////////////////////////////////////////////
     // create time control objects
@@ -853,9 +866,10 @@ void b200_impl::setup_radio(const size_t dspno)
     _tree->create<bool>(rx_dsp_path / "rate" / "set").set(false);
     _tree->access<double>(rx_dsp_path / "rate" / "value")
         .set_coercer(boost::bind(&b200_impl::coerce_rx_samp_rate, this, perif.ddc, dspno, _1))
-        .add_coerced_subscriber([this](const double){
+        .add_coerced_subscriber([this, rx_dsp_path](const double){
             if (this->_tree) {
-                _tree->access<bool>(rx_dsp_path / "rate" / "set").set(true);
+                this->_tree->access<bool>(rx_dsp_path / "rate" / "set")
+                    .set(true);
             }
         })
         .add_coerced_subscriber(boost::bind(&b200_impl::update_rx_samp_rate, this, dspno, _1))
@@ -875,9 +889,10 @@ void b200_impl::setup_radio(const size_t dspno)
     _tree->create<bool>(tx_dsp_path / "rate" / "set").set(false);
     _tree->access<double>(tx_dsp_path / "rate" / "value")
         .set_coercer(boost::bind(&b200_impl::coerce_tx_samp_rate, this, perif.duc, dspno, _1))
-        .add_coerced_subscriber([this](const double){
+        .add_coerced_subscriber([this, tx_dsp_path](const double){
             if (this->_tree) {
-                tree->access<bool>(tx_dsp_path / "rate" / "set").set(true);
+                this->_tree->access<bool>(tx_dsp_path / "rate" / "set")
+                    .set(true);
             }
         })
         .add_coerced_subscriber(boost::bind(&b200_impl::update_tx_samp_rate, this, dspno, _1))
@@ -923,6 +938,11 @@ void b200_impl::setup_radio(const size_t dspno)
             _tree->create<std::vector<std::string> >(rf_fe_path / "antenna" / "options").set(ants);
             _tree->create<std::string>(rf_fe_path / "antenna" / "value").set("TX/RX");
         }
+
+        if (_enable_user_regs) {
+            _tree->create<uhd::wb_iface::sptr>(rf_fe_path / "user_settings/iface")
+                .set(perif.user_settings);
+        }
     }
 }
 
diff --git a/host/lib/usrp/b200/b200_impl.hpp b/host/lib/usrp/b200/b200_impl.hpp
index 3e1a62249..12678c13d 100644
--- a/host/lib/usrp/b200/b200_impl.hpp
+++ b/host/lib/usrp/b200/b200_impl.hpp
@@ -32,6 +32,7 @@
 #include <uhdlib/usrp/cores/radio_ctrl_core_3000.hpp>
 #include <uhdlib/usrp/cores/rx_dsp_core_3000.hpp>
 #include <uhdlib/usrp/cores/tx_dsp_core_3000.hpp>
+#include <uhdlib/usrp/cores/user_settings_core_3000.hpp>
 #include <uhdlib/usrp/common/recv_packet_demuxer_3000.hpp>
 #include <uhdlib/usrp/common/ad936x_manager.hpp>
 #include <uhdlib/usrp/common/adf4001_ctrl.hpp>
@@ -127,6 +128,9 @@ private:
     b200_product_t  _product;
     size_t          _revision;
     bool            _gpsdo_capable;
+    //! This flag is true if the FPGA has custom (user) registers and access to
+    // those needs to be enabled from software.
+    const bool      _enable_user_regs;
 
     //controllers
     b200_iface::sptr _iface;
@@ -188,6 +192,7 @@ private:
         tx_dsp_core_3000::sptr duc;
         boost::weak_ptr<uhd::rx_streamer> rx_streamer;
         boost::weak_ptr<uhd::tx_streamer> tx_streamer;
+        user_settings_core_3000::sptr user_settings;
         bool ant_rx2;
     };
     std::vector<radio_perifs_t> _radio_perifs;
diff --git a/host/lib/usrp/b200/b200_regs.hpp b/host/lib/usrp/b200/b200_regs.hpp
index 6cc670d22..cedbe0ff5 100644
--- a/host/lib/usrp/b200/b200_regs.hpp
+++ b/host/lib/usrp/b200/b200_regs.hpp
@@ -37,6 +37,8 @@ localparam SR_TIME      = 128;
 localparam SR_RX_FMT    = 136;
 localparam SR_TX_FMT    = 138;
 localparam SR_FP_GPIO   = 200;
+localparam SR_USER_SR_BASE = 253;
+localparam SR_USER_RB_ADDR = 255;
 
 localparam RB32_TEST            = 0;
 localparam RB64_TIME_NOW        = 8;
-- 
cgit v1.2.3