[sca-mft-psu] Use dedicated register for identifying an MFT PSU link

Author: kostorr

include/Alf/ScaMftPsu.h

@@ -99,6 +99,11 @@ class ScaMftPsu
   ///         o2::alf::ScaMftPsuException on invalid operation or error
   std::string writeSequence(const std::vector<std::pair<Operation, Data>>& operations, bool lock = false);
 
+  /// Checks if the link should be used for the MFT PSU service
+  /// \param link The AlfLink to check
+  /// \return A bool if the link should be used for the MFT PSU service
+  static bool isAnMftPsuLink(AlfLink link);
+
  private:
   uint32_t barRead(uint32_t index);
   void barWrite(uint32_t index, uint32_t data);

src/AlfServer.cxx

@@ -563,7 +563,7 @@ void AlfServer::makeRpcServers(std::vector<AlfLink> links)
                                         .setCardId(link.serialId);
       mSessions[link.serialId] = std::make_shared<lla::Session>(params);
 
-      if (kMftPsuSerials.find(link.serialId.getSerial()) != kMftPsuSerials.end()) {
+      if (ScaMftPsu::isAnMftPsuLink(link)) {
         // SCA MFT PSU Sequence
         servers.push_back(makeServer(names.scaMftPsuSequence(),
                                      [link, this](auto parameter) { return scaMftPsuBlobWrite(parameter, link); }));

src/AlfServer.h

@@ -77,8 +77,6 @@ class AlfServer
   /// serialId -> link -> vector of RPC servers
   std::map<roc::SerialId, std::map<int, std::vector<std::unique_ptr<StringRpcServer>>>, serialIdComparator> mRpcServers;
   std::map<roc::SerialId, std::shared_ptr<lla::Session>, serialIdComparator> mSessions;
-
-  const std::unordered_set<int> kMftPsuSerials = { 0, 553 };
 };
 
 } // namespace alf

src/ScaMftPsu.cxx

@@ -333,5 +333,10 @@ std::string ScaMftPsu::writeSequence(const std::vector<std::pair<Operation, Data
   return resultBuffer.str();
 }
 
+// static
+bool ScaMftPsu::isAnMftPsuLink(AlfLink link) {
+  return link.bar->readRegister(sc_regs::SCA_MFT_PSU_ID.index) == 0x1;
+}
+
 } // namespace alf
 } // namespace o2