added template for removing in_handler

git-svn-id: svn://svn.berlios.de/openocd/trunk@1629 b42882b7-edfa-0310-969c-e2dbd0fdcd60

3 files changed, 36 insertions, 11 deletions

diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c
index 91f14b15..242eb56b 100644
--- a/src/jtag/jtag.c
+++ b/src/jtag/jtag.c
@@ -42,6 +42,8 @@
 #include <strings.h>
 #endif
 
+static void jtag_execute_queue_noclear(void);
+
 /* note that this is not marked as static as it must be available from outside jtag.c for those
    that implement the jtag_xxx() minidriver layer
 */
@@ -670,6 +672,12 @@ void jtag_add_dr_scan(int num_fields, scan_field_t *fields, tap_state_t state)
 		jtag_error=retval;
 }
 
+void jtag_add_dr_scan_now(int num_fields, scan_field_t *fields, tap_state_t state)
+{
+	jtag_add_dr_scan(num_fields, fields, state);
+	jtag_execute_queue_noclear();
+}
+
 int MINIDRIVER(interface_jtag_add_dr_scan)(int num_fields, scan_field_t *fields, tap_state_t state)
 {
 	int j;
@@ -1438,13 +1446,21 @@ int MINIDRIVER(interface_jtag_execute_queue)(void)
 	return retval;
 }
 
-int jtag_execute_queue(void)
+static void jtag_execute_queue_noclear(void)
 {
 	int retval=interface_jtag_execute_queue();
-	if (retval==ERROR_OK)
+	/* we keep the first error */
+	if ((jtag_error==ERROR_OK)&&(retval!=ERROR_OK))
 	{
-		retval=jtag_error;
+		jtag_error=retval;
 	}
+}
+
+int jtag_execute_queue(void)
+{
+	int retval;
+	jtag_execute_queue_noclear();
+	retval=jtag_error;
 	jtag_error=ERROR_OK;
 	return retval;
 }
@@ -1485,10 +1501,10 @@ int jtag_examine_chain(void)
 	field.tap = NULL;
 	field.num_bits = sizeof(idcode_buffer) * 8;
 	field.out_value = idcode_buffer;
-	
+
 	field.in_value = idcode_buffer;
-	
-	
+
+
 	field.in_handler = NULL;
 
 	for (i = 0; i < JTAG_MAX_CHAIN_SIZE; i++)
@@ -1662,10 +1678,7 @@ int jtag_validate_chain(void)
 	field.tap = NULL;
 	field.num_bits = total_ir_length;
 	field.out_value = ir_test;
-	
 	field.in_value = ir_test;
-	
-	
 	field.in_handler = NULL;
 
 	jtag_add_plain_ir_scan(1, &field, TAP_RESET);
diff --git a/src/jtag/jtag.h b/src/jtag/jtag.h
index 604692cd..c0f94856 100644
--- a/src/jtag/jtag.h
+++ b/src/jtag/jtag.h
@@ -561,6 +561,10 @@ extern int  jtag_register_commands(struct command_context_s* cmd_ctx);
 extern void jtag_add_ir_scan(int num_fields, scan_field_t* fields, tap_state_t endstate);
 extern int  interface_jtag_add_ir_scan(int num_fields, scan_field_t* fields, tap_state_t endstate);
 extern void jtag_add_dr_scan(int num_fields, scan_field_t* fields, tap_state_t endstate);
+/* same as jtag_add_dr_scan but the scan is executed immediately. sets jtag_error if there
+ * was a failure.
+ */
+extern void jtag_add_dr_scan_now(int num_fields, scan_field_t* fields, tap_state_t endstate);
 extern int  interface_jtag_add_dr_scan(int num_fields, scan_field_t* fields, tap_state_t endstate);
 extern void jtag_add_plain_ir_scan(int num_fields, scan_field_t* fields, tap_state_t endstate);
 extern int  interface_jtag_add_plain_ir_scan(int num_fields, scan_field_t* fields, tap_state_t endstate);
@@ -696,6 +700,16 @@ int  interface_jtag_add_clocks(int num_cycles);
  */
 extern int            jtag_execute_queue(void);
 
+/* this flag is set when an error occurs while executing the queue. cleared
+ * by jtag_execute_queue()
+ *
+ * this flag can also be set from application code if some error happens
+ * during processing that should be reported during jtag_execute_queue().
+ */
+extern int jtag_error;
+
+
+
 /* can be implemented by hw+sw */
 extern int            interface_jtag_execute_queue(void);
 extern int            jtag_power_dropout(int* dropout);
diff --git a/src/jtag/zy1000.c b/src/jtag/zy1000.c
index f2765c0b..b1778068 100644
--- a/src/jtag/zy1000.c
+++ b/src/jtag/zy1000.c
@@ -39,8 +39,6 @@
 #define ZYLIN_OPENOCD_VERSION "Zylin JTAG ZY1000 " ZYLIN_VERSION " " ZYLIN_DATE " " ZYLIN_TIME
 const char *zylin_config_dir="/config/settings";
 
-extern int jtag_error;
-
 /* low level command set
  */
 int zy1000_read(void);