host: x4xx: Implement GPIO API

This implements the GPIO API for X410 through get_gpio_attr and
set_gpio_attr. In ATR mode, which channel's ATR state is chosen by the
set_gpio_src call, setting e.g. DB0_RF0 for channel 0 or DB0_RF1 for
channel 1. In manual mode, all 24 bits (for both ports) are set in
a single register write.

Although the front panel of the device has two ports, labelled GPIO0 and
GPIO1, this API exposes them as though they were a single 24-bit GPIO
port.

1 files changed, 35 insertions, 0 deletions

diff --git a/host/lib/usrp/x400/x400_radio_control.cpp b/host/lib/usrp/x400/x400_radio_control.cpp
index 281ae7916..8b0fbf906 100644
--- a/host/lib/usrp/x400/x400_radio_control.cpp
+++ b/host/lib/usrp/x400/x400_radio_control.cpp
@@ -12,6 +12,7 @@
 #include <uhdlib/usrp/dboard/debug_dboard.hpp>
 #include <uhdlib/usrp/dboard/null_dboard.hpp>
 #include <uhdlib/usrp/dboard/zbx/zbx_dboard.hpp>
+#include <uhdlib/rfnoc/reg_iface_adapter.hpp>
 
 namespace uhd { namespace rfnoc {
 
@@ -178,6 +179,9 @@ x400_radio_control_impl::x400_radio_control_impl(make_args_ptr make_args)
         get_num_output_ports(), _adc_self_calibration, get_unique_id());
     register_feature(_fpga_onload);
     _mb_control->_fpga_onload->request_cb(_fpga_onload);
+
+    _gpios = std::make_shared<x400::gpio_control>(_rpcc,
+        RFNOC_MAKE_WB_IFACE(regmap::PERIPH_BASE + 0xC000, 0));
 }
 
 void x400_radio_control_impl::_init_prop_tree()
@@ -327,6 +331,37 @@ double x400_radio_control_impl::set_rate(const double rate)
     return get_rate();
 }
 
+std::vector<std::string> x400_radio_control_impl::get_gpio_banks() const
+{
+    return {x400::GPIO_BANK_NAME};
+}
+
+uint32_t x400_radio_control_impl::get_gpio_attr(
+    const std::string& bank, const std::string& attr)
+{
+    std::lock_guard<std::recursive_mutex> l(_lock);
+    if (bank != x400::GPIO_BANK_NAME) {
+        throw uhd::key_error("Invalid GPIO bank " + bank);
+    }
+    if (usrp::gpio_atr::gpio_attr_rev_map.count(attr) == 0) {
+        throw uhd::key_error("Invalid GPIO attribute " + attr);
+    }
+    return _gpios->get_gpio_attr(usrp::gpio_atr::gpio_attr_rev_map.at(attr));
+}
+
+void x400_radio_control_impl::set_gpio_attr(
+    const std::string& bank, const std::string& attr, const uint32_t value)
+{
+    std::lock_guard<std::recursive_mutex> l(_lock);
+    if (bank != x400::GPIO_BANK_NAME) {
+        throw uhd::key_error("Invalid GPIO bank " + bank);
+    }
+    if (usrp::gpio_atr::gpio_attr_rev_map.count(attr) == 0) {
+        throw uhd::key_error("Invalid GPIO attribute " + attr);
+    }
+    _gpios->set_gpio_attr(usrp::gpio_atr::gpio_attr_rev_map.at(attr), value);
+}
+
 eeprom_map_t x400_radio_control_impl::get_db_eeprom()
 {
     std::lock_guard<std::recursive_mutex> l(_lock);