Initial GXFP5130 userspace prototype

include/gxfp/protocol.h

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#ifndef GXFP_PROTOCOL_H
+#define GXFP_PROTOCOL_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define GXFP_MP_COMMAND			0xA0
+#define GXFP_MP_RX_COMMAND		0x0A
+#define GXFP_GOODIX_CHECKSUM_TARGET	0xAA
+#define GXFP_GOODIX_ACK			0xB0
+#define GXFP_CMD_IMAGE_CAPTURE		0x20
+
+struct gxfp_frame_view {
+	uint8_t command;
+	const uint8_t *payload;
+	size_t payload_len;
+	uint8_t checksum;
+};
+
+int gxfp_frame_build(uint8_t command,
+		     const void *payload, size_t payload_len,
+		     uint8_t *output, size_t output_capacity,
+		     size_t *output_len);
+
+int gxfp_frame_parse(const void *frame, size_t frame_len,
+		     struct gxfp_frame_view *view);
+
+#endif