pld: add support for lattice ecp2 and ecp3 devices

Change-Id: I29c227c37be464f7ecc97a30d9cf3da1442e2b7f
Signed-off-by: Daniel Anselmi <danselmi@gmx.ch>
Reviewed-on: https://review.openocd.org/c/openocd/+/7396
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins

src/pld/lattice_bit.h

@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/***************************************************************************
+ *   Copyright (C) 2022 by Daniel Anselmi                                  *
+ *   danselmi@gmx.ch                                                       *
+ ***************************************************************************/
+
+#ifndef OPENOCD_PLD_LATTICE_BIT_H
+#define OPENOCD_PLD_LATTICE_BIT_H
+
+#include "helper/types.h"
+#include "raw_bit.h"
+
+
+struct lattice_bit_file {
+	struct raw_bit_file raw_bit;
+	size_t offset;
+	uint32_t idcode;
+	const char *part; /* reuses memory in raw_bit_file */
+	bool has_id;
+};
+
+enum lattice_family_e {
+	LATTICE_ECP2,
+	LATTICE_ECP3,
+	LATTICE_ECP5,
+	LATTICE_CERTUS,
+	LATTICE_UNKNOWN,
+};
+
+int lattice_read_file(struct lattice_bit_file *bit_file, const char *filename, enum lattice_family_e family);
+
+#endif /* OPENOCD_PLD_LATTICE_BIT_H */