X-Git-Url: https://review.openocd.org/gitweb?a=blobdiff_plain;f=src%2Fjtag%2Fdrivers%2Fbitbang.h;h=577717ebd241a6ba8e1ab83e6d2fd0e453ffafd4;hb=refs%2Fchanges%2F12%2F4312%2F9;hp=6b7d63aa78d819cae693213a5b667b36f7c22d13;hpb=08d4411b59dd8bd0e7d8009003b71d23acbf6eee;p=openocd.git

diff --git a/src/jtag/drivers/bitbang.h b/src/jtag/drivers/bitbang.h
index 6b7d63aa78..577717ebd2 100644
--- a/src/jtag/drivers/bitbang.h
+++ b/src/jtag/drivers/bitbang.h
@@ -16,25 +16,55 @@
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 
-#ifndef BITBANG_H
-#define BITBANG_H
+#ifndef OPENOCD_JTAG_DRIVERS_BITBANG_H
+#define OPENOCD_JTAG_DRIVERS_BITBANG_H
 
+#include <jtag/swd.h>
+
+typedef enum {
+	BB_LOW,
+	BB_HIGH,
+	BB_ERROR
+} bb_value_t;
+
+/** Low level callbacks (for bitbang).
+ *
+ * Either read(), or sample() and read_sample() must be implemented.
+ *
+ * The sample functions allow an interface to batch a number of writes and
+ * sample requests together. Not waiting for a value to come back can greatly
+ * increase throughput. */
 struct bitbang_interface {
-	/* low level callbacks (for bitbang)
-	 */
-	int (*read)(void);
-	void (*write)(int tck, int tms, int tdi);
-	void (*reset)(int trst, int srst);
-	void (*blink)(int on);
+	/** Sample TDO. */
+	bb_value_t (*read)(void);
+
+	/** The number of TDO samples that can be buffered up before the caller has
+	 * to call read_sample. */
+	size_t buf_size;
+	/** Sample TDO and put the result in a buffer. */
+	int (*sample)(void);
+	/** Return the next unread value from the buffer. */
+	bb_value_t (*read_sample)(void);
+
+	/** Set TCK, TMS, and TDI to the given values. */
+	int (*write)(int tck, int tms, int tdi);
+	int (*reset)(int trst, int srst);
+	int (*blink)(int on);
+	int (*swdio_read)(void);
+	void (*swdio_drive)(bool on);
 };
 
+const struct swd_driver bitbang_swd;
+
+extern bool swd_mode;
+
 int bitbang_execute_queue(void);
 
 extern struct bitbang_interface *bitbang_interface;
+void bitbang_switch_to_swd(void);
+int bitbang_swd_switch_seq(enum swd_special_seq seq);
 
-#endif /* BITBANG_H */
+#endif /* OPENOCD_JTAG_DRIVERS_BITBANG_H */