gps: gpsd: Adding gpsd_iface to interface with gpsd.

The gpsd_iface class might be useful for more than just e3x0,
it therefore belongs into lib/usrp instead of lib/usrp/e300.

A new UHD component is being registered, to cope with the additional
dependency. If libgps is not found, UHD and E300 will be compiled
without GPS support.

This has several consequences:
- The E310 GPSDO should now work transparently over network
- Users can use the GPS through gpsd for other applications
  *while* running UHD applications
- We now have a dependency on libgps

We need currently at least version 3.11 (while running 3.14),
on the device. Older versions do work if 3.10 runs on both
sides e.g

Reviewed-by: Martin Braun <martin.braun@ettus.com>
Reviewed-by: Ashish Chaudhari <ashish.chaudhari@ettus.com>
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/host/lib/usrp/e300/e300_sensor_manager.hpp b/host/lib/usrp/e300/e300_sensor_manager.hpp
index 09f889251..bfaf8e90c 100644
--- a/host/lib/usrp/e300/e300_sensor_manager.hpp
+++ b/host/lib/usrp/e300/e300_sensor_manager.hpp
@@ -39,25 +39,22 @@ struct sensor_transaction_t {
 
 
 
-enum sensor {ZYNQ_TEMP=0, GPS_FOUND=1, GPS_TIME=2,
-             GPS_LOCK=3, REF_LOCK=4};
+enum sensor {ZYNQ_TEMP=0, REF_LOCK=4};
 
 class e300_sensor_manager : boost::noncopyable
 {
 public:
     typedef boost::shared_ptr<e300_sensor_manager> sptr;
-    virtual bool get_gps_found(void) = 0;
 
     virtual uhd::sensor_value_t get_sensor(const std::string &key) = 0;
     virtual std::vector<std::string> get_sensors(void) = 0;
 
     virtual uhd::sensor_value_t get_mb_temp(void) = 0;
-    virtual uhd::sensor_value_t get_gps_lock(void) = 0;
-    virtual uhd::sensor_value_t get_gps_time(void) = 0;
     virtual uhd::sensor_value_t get_ref_lock(void) = 0;
 
+
     static sptr make_proxy(uhd::transport::zero_copy_if::sptr xport);
-    static sptr make_local(uhd::gps_ctrl::sptr gps_ctrl, global_regs::sptr global_regs);
+    static sptr make_local(global_regs::sptr global_regs);
 
     // Note: This is a hack
     static boost::uint32_t pack_float_in_uint32_t(const float &v)