jtag: make cmd_queue_scan_field_clone public

This patch makes the cmd_queue_scan_field_clone function public. This
permits targets to insert fields without affecting the submitted
scan_field list. This will be used in an upcoming target implementation
that needs to insert additional padding bits.

Change-Id: I8fbd3b9b4e413432471f4f1444048932c8fa189e
Signed-off-by: Steven Stallion <stallion@squareup.com>
Reviewed-on: http://openocd.zylin.com/4082
Tested-by: jenkins
Reviewed-by: Matthias Welwarsky <matthias@welwarsky.de>

src/jtag/Makefile.am

@@ -1,6 +1,6 @@
 noinst_LTLIBRARIES += %D%/libjtag.la
 
-JTAG_SRCS =
+JTAG_SRCS = %D%/commands.c
 %C%_libjtag_la_LIBADD =
 
 BUILT_SOURCES += %D%/minidriver_imp.h
@@ -13,7 +13,7 @@ JTAG_SRCS += %D%/zy1000/zy1000.c
 JTAG_MINIDRIVER_DIR = %D%/zy1000
 endif
 if MINIDRIVER_DUMMY
-JTAG_SRCS += %D%/minidummy/minidummy.c %D%/commands.c
+JTAG_SRCS += %D%/minidummy/minidummy.c
 JTAG_MINIDRIVER_DIR = %D%/minidummy
 endif
 
@@ -29,7 +29,6 @@ CLEANFILES += %D%/jtag_minidriver.h
 else
 
 MINIDRIVER_IMP_DIR = %D%/drivers
-JTAG_SRCS += %D%/commands.c
 
 if HLADAPTER
 include %D%/hla/Makefile.am

src/jtag/commands.c

@@ -144,6 +144,18 @@ void jtag_command_queue_reset(void)
 	next_command_pointer = &jtag_command_queue;
 }
 
+/**
+ * Copy a struct scan_field for insertion into the queue.
+ *
+ * This allocates a new copy of out_value using cmd_queue_alloc.
+ */
+void jtag_scan_field_clone(struct scan_field *dst, const struct scan_field *src)
+{
+	dst->num_bits	= src->num_bits;
+	dst->out_value	= buf_cpy(src->out_value, cmd_queue_alloc(DIV_ROUND_UP(src->num_bits, 8)), src->num_bits);
+	dst->in_value	= src->in_value;
+}
+
 enum scan_type jtag_scan_type(const struct scan_command *cmd)
 {
 	int i;

src/jtag/commands.h

@@ -168,6 +168,7 @@ void *cmd_queue_alloc(size_t size);
 void jtag_queue_command(struct jtag_command *cmd);
 void jtag_command_queue_reset(void);
 
+void jtag_scan_field_clone(struct scan_field *dst, const struct scan_field *src);
 enum scan_type jtag_scan_type(const struct scan_command *cmd);
 int jtag_scan_size(const struct scan_command *cmd);
 int jtag_read_buffer(uint8_t *buffer, const struct scan_command *cmd);

src/jtag/drivers/driver.c

@@ -55,18 +55,6 @@ static void jtag_callback_queue_reset(void)
 	jtag_callback_queue_tail = NULL;
 }
 
-/**
- * Copy a struct scan_field for insertion into the queue.
- *
- * This allocates a new copy of out_value using cmd_queue_alloc.
- */
-static void cmd_queue_scan_field_clone(struct scan_field *dst, const struct scan_field *src)
-{
-	dst->num_bits	= src->num_bits;
-	dst->out_value	= buf_cpy(src->out_value, cmd_queue_alloc(DIV_ROUND_UP(src->num_bits, 8)), src->num_bits);
-	dst->in_value	= src->in_value;
-}
-
 /**
  * see jtag_add_ir_scan()
  *
@@ -101,7 +89,7 @@ int interface_jtag_add_ir_scan(struct jtag_tap *active,
 			/* if TAP is listed in input fields, copy the value */
 			tap->bypass = 0;
 
-			cmd_queue_scan_field_clone(field, in_fields);
+			jtag_scan_field_clone(field, in_fields);
 		} else {
 			/* if a TAP isn't listed in input fields, set it to BYPASS */
 
@@ -168,7 +156,7 @@ int interface_jtag_add_dr_scan(struct jtag_tap *active, int in_num_fields,
 #endif /* NDEBUG */
 
 			for (int j = 0; j < in_num_fields; j++) {
-				cmd_queue_scan_field_clone(field, in_fields + j);
+				jtag_scan_field_clone(field, in_fields + j);
 
 				field++;
 			}