add read function of pcie40 register

Pcie40Applications/regconfig.cpp

@@ -20,6 +20,8 @@
 
 extern "C" int  ecs_open(int dev, int bar);
 extern "C" void ecs_close(int dev, int bar);
+extern "C" unsigned ecs_read(int dev, int bar, unsigned add) ; 
+
 //#define PCIE_DEV     0
 #define MAX_NUM_CH   48
 #define MAX_SLOT     3
@@ -34,6 +36,7 @@ char *filename;
 char *operation;
 
 //Flag for switch slc access method
+bool PCIE40_REG      = false;
 bool USE_FEE8        = false;
 bool USE_FEE32       = false;
 bool READ_ONLY       = false;
@@ -112,6 +115,9 @@ void argument(int argc, char **argv){
 	fprintf(stderr, "Invalid device slot %d, Valid slot [0, %d]\n", dev_slot, MAX_SLOT);
       }
     }
+    if(ss=="--pcie40"){
+      PCIE40_REG = true;
+    } 
     if(ss=="--ch"){
       ch = atoi(argv[++i]);
       if( ch<0 || ch >= MAX_NUM_CH){
@@ -155,8 +161,10 @@ void argument(int argc, char **argv){
     if(ss=="-h" || ss=="-help"){
       fprintf(stderr, "%s version %d.%02d date %d\n"
             , ARGV0, VERSION/100, VERSION%100, MOD_DATE);
-      fprintf(stderr,  "usage: %s --ch 0 --fee32 -w 0x12 0x0\n"
+      fprintf(stderr,  "usage: %s --pcie40 -r 0x00050010\n", ARGV0);
+      fprintf(stderr,  "       %s --ch 0 --fee32 -w 0x12 0x0\n"
                        "       --dev   xx              #device slot number which installed PCIe40\n" 
+                       "       --pcie40                #access the register of pcie40\n" 
                        "       --ch    xx              #link channel number\n" 
                        "       --fee8 or --fee32       #use A7D8 or A16D32 for access register\n"
                        "       -r xx or -w xx xx       #read or write register with address xx[hex] or data xx[hex]\n\n"
@@ -340,6 +348,11 @@ int main(int argc, char** argv){
   pcie40reg_t pcie40;
   int result = -1;
 
+  if(PCIE40_REG && READ_ONLY){
+    result = ecs_read( dev_slot , SLC_BAR , addr);
+    printf("reg%08x = %08x\n", addr, result);    
+  }
+
   if(pcie40_b2l_status(dev_slot, ch) && pcie40_b2l_rxready(dev_slot, ch) && pcie40_b2l_txready(dev_slot, ch)){
     if(USE_FEE8 && READ_ONLY){
       result = pcie40_readfee8( dev_slot , ch , addr );