Fix issue where we ignore important timing parameters.

litedram/core/bankmachine.py

@@ -216,6 +216,7 @@ class BankMachine(Module):
             track_close.eq(1)
         )
         fsm.act("ACTIVATE",
+            If(activate_allowed,
                 sel_row_addr.eq(1),
                 track_open.eq(1),
                 cmd.valid.eq(1),
@@ -226,8 +227,9 @@ class BankMachine(Module):
                 ),
                 cmd.ras.eq(1)
             )
+        )
         fsm.act("REFRESH",
-            If(twtpcon.ready,
+            If(twtpcon.ready & precharge_allowed,
                 self.refresh_gnt.eq(1),
             ),
             track_close.eq(1),