Do not check ir capture if there is no IDCODE

git-svn-id: svn://svn.berlios.de/openocd/trunk@2812 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/jtag/core.c b/src/jtag/core.c
index 854236f3d15346d31b5d3bba24e89c4803ff34ea..0b752ea426037c58a8317a66b0e6fda210bf4b0a 100644 (file)
--- a/src/jtag/core.c
+++ b/src/jtag/core.c
@@ -1108,19 +1108,22 @@ static int jtag_validate_ircapture(void)
                        break;
                }
 
-               /* Validate the two LSBs, which must be 01 per JTAG spec.
-                * REVISIT we might be able to verify some MSBs too, using
-                * ircapture/irmask attributes.
-                */
-               val = buf_get_u32(ir_test, chain_pos, tap->ir_length);
-               if ((val & 0x3) != 1) {
-                       LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x..1",
-                                       jtag_tap_name(tap),
-                                       (tap->ir_length + 7) / tap->ir_length,
-                                       val);
-
-                       retval = ERROR_JTAG_INIT_FAILED;
-                       goto done;
+               if (tap->hasidcode)
+               {
+                       /* Validate the two LSBs, which must be 01 per JTAG spec.
+                        * REVISIT we might be able to verify some MSBs too, using
+                        * ircapture/irmask attributes.
+                        */
+                       val = buf_get_u32(ir_test, chain_pos, tap->ir_length);
+                       if ((val & 0x3) != 1) {
+                               LOG_ERROR("%s: IR capture error; saw 0x%0*x not 0x..1",
+                                               jtag_tap_name(tap),
+                                               (tap->ir_length + 7) / tap->ir_length,
+                                               val);
+
+                               retval = ERROR_JTAG_INIT_FAILED;
+                               goto done;
+                       }
                }
                LOG_DEBUG("%s: IR capture 0x%0*x", jtag_tap_name(tap),
                                (tap->ir_length + 7) / tap->ir_length, val);