add log debug log message and define optical/motor flags

backend/genesys_low.c

@@ -1122,6 +1122,10 @@ sanei_genesys_wait_for_home (Genesys_Device * dev)
 	       sane_strstatus (status));
 	  return status;
 	}
+          if (DBG_LEVEL >= DBG_io2)
+            {
+              sanei_genesys_print_status (val);
+            }
       ++loop;
     }
   while (loop < 300 && !(val & HOMESNR) && status == SANE_STATUS_GOOD);

backend/genesys_low.h

@@ -717,6 +717,12 @@ typedef struct {
 #define SCAN_FLAG_CALIBRATION              0x100
 #define SCAN_FLAG_FEEDING                  0x200
 
+#define OPTICAL_FLAG_DISABLE_GAMMA   1
+#define OPTICAL_FLAG_DISABLE_SHADING 2
+#define OPTICAL_FLAG_DISABLE_LAMP    4
+#define OPTICAL_FLAG_ENABLE_LEDADD   8
+#define OPTICAL_FLAG_DISABLE_DOUBLE  16
+
 /*--------------------------------------------------------------------------*/
 /*       common functions needed by low level specific functions            */
 /*--------------------------------------------------------------------------*/