usrp2: added fpga compat number, renamed firmware proto version to compat

4 files changed, 22 insertions, 11 deletions

diff --git a/host/lib/usrp/usrp2/fw_common.h b/host/lib/usrp/usrp2/fw_common.h
index c4dabf5bc..a781c1a21 100644
--- a/host/lib/usrp/usrp2/fw_common.h
+++ b/host/lib/usrp/usrp2/fw_common.h
@@ -32,9 +32,9 @@ extern "C" {
     #define __stdint(type) type
 #endif
 
-//defines the protocol version in this shared header
-//increment this value when the protocol is changed
-#define USRP2_PROTO_VERSION 5
+//fpga and firmware compatibility numbers
+#define USRP2_FPGA_COMPAT_NUM 1
+#define USRP2_FW_COMPAT_NUM 5
 
 //used to differentiate control packets over data port
 #define USRP2_INVALID_VRT_HEADER 0
diff --git a/host/lib/usrp/usrp2/usrp2_iface.cpp b/host/lib/usrp/usrp2/usrp2_iface.cpp
index a21157d76..4124221ef 100644
--- a/host/lib/usrp/usrp2/usrp2_iface.cpp
+++ b/host/lib/usrp/usrp2/usrp2_iface.cpp
@@ -15,6 +15,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 //
 
+#include "usrp2_regs.hpp"
 #include "usrp2_iface.hpp"
 #include <uhd/utils/assert.hpp>
 #include <uhd/types/dict.hpp>
@@ -22,6 +23,7 @@
 #include <boost/foreach.hpp>
 #include <boost/asio.hpp> //used for htonl and ntohl
 #include <boost/assign/list_of.hpp>
+#include <boost/format.hpp>
 #include <stdexcept>
 #include <algorithm>
 
@@ -47,6 +49,15 @@ public:
  **********************************************************************/
     usrp2_iface_impl(udp_simple::sptr ctrl_transport){
         _ctrl_transport = ctrl_transport;
+
+         //check the fpga compatibility number
+        const boost::uint32_t fpga_compat_num = this->peek32(U2_REG_COMPAT_NUM_RB);
+        if (fpga_compat_num != USRP2_FPGA_COMPAT_NUM){
+            throw std::runtime_error(str(boost::format(
+                "Expected fpga compatibility number %d, but got %d:\n"
+                "The fpga build is not compatible with the host code build."
+            ) % int(USRP2_FPGA_COMPAT_NUM) % fpga_compat_num));
+        }
     }
 
     ~usrp2_iface_impl(void){
@@ -168,7 +179,7 @@ public:
 
         //fill in the seq number and send
         usrp2_ctrl_data_t out_copy = out_data;
-        out_copy.proto_ver = htonl(USRP2_PROTO_VERSION);
+        out_copy.proto_ver = htonl(USRP2_FW_COMPAT_NUM);
         out_copy.seq = htonl(++_ctrl_seq_num);
         _ctrl_transport->send(boost::asio::buffer(&out_copy, sizeof(usrp2_ctrl_data_t)));
 
@@ -177,12 +188,11 @@ public:
         const usrp2_ctrl_data_t *ctrl_data_in = reinterpret_cast<const usrp2_ctrl_data_t *>(usrp2_ctrl_data_in_mem);
         while(true){
             size_t len = _ctrl_transport->recv(boost::asio::buffer(usrp2_ctrl_data_in_mem), CONTROL_TIMEOUT_MS);
-            if(len >= sizeof(boost::uint32_t) and ntohl(ctrl_data_in->proto_ver) != USRP2_PROTO_VERSION){
-                throw std::runtime_error(str(
-                    boost::format("Expected protocol version %d, but got %d\n"
-                    "The firmware build does not match the host code build."
-                    ) % int(USRP2_PROTO_VERSION) % ntohl(ctrl_data_in->proto_ver)
-                ));
+            if(len >= sizeof(boost::uint32_t) and ntohl(ctrl_data_in->proto_ver) != USRP2_FW_COMPAT_NUM){
+                throw std::runtime_error(str(boost::format(
+                    "Expected protocol compatibility number %d, but got %d:\n"
+                    "The firmware build is not compatible with the host code build."
+                ) % int(USRP2_FW_COMPAT_NUM) % ntohl(ctrl_data_in->proto_ver)));
             }
             if (len >= sizeof(usrp2_ctrl_data_t) and ntohl(ctrl_data_in->seq) == _ctrl_seq_num){
                 return *ctrl_data_in;
diff --git a/host/lib/usrp/usrp2/usrp2_impl.cpp b/host/lib/usrp/usrp2/usrp2_impl.cpp
index 2c314c085..21f411afe 100644
--- a/host/lib/usrp/usrp2/usrp2_impl.cpp
+++ b/host/lib/usrp/usrp2/usrp2_impl.cpp
@@ -97,7 +97,7 @@ static uhd::device_addrs_t usrp2_find(const device_addr_t &hint){
 
     //send a hello control packet
     usrp2_ctrl_data_t ctrl_data_out;
-    ctrl_data_out.proto_ver = htonl(USRP2_PROTO_VERSION);
+    ctrl_data_out.proto_ver = htonl(USRP2_FW_COMPAT_NUM);
     ctrl_data_out.id = htonl(USRP2_CTRL_ID_WAZZUP_BRO);
     udp_transport->send(boost::asio::buffer(&ctrl_data_out, sizeof(ctrl_data_out)));
 
diff --git a/host/lib/usrp/usrp2/usrp2_regs.hpp b/host/lib/usrp/usrp2/usrp2_regs.hpp
index cc9094ae7..9d306090b 100644
--- a/host/lib/usrp/usrp2/usrp2_regs.hpp
+++ b/host/lib/usrp/usrp2/usrp2_regs.hpp
@@ -107,6 +107,7 @@
 
 #define U2_REG_TIME64_SECS_RB  (0xCC00 + 4*10)
 #define U2_REG_TIME64_TICKS_RB (0xCC00 + 4*11)
+#define U2_REG_COMPAT_NUM_RB   (0xCC00 + 4*12)
 
 //pps flags (see above)
 #define U2_FLAG_TIME64_PPS_NEGEDGE (0 << 0)