Add bootloader extension

include/icsneo/device/extensions/bootloader/communication/communication.h

@@ -0,0 +1,49 @@
+#ifndef __BOOTLOADER_COMMUNICATION_H_
+#define __BOOTLOADER_COMMUNICATION_H_
+
+#ifdef __cplusplus
+
+#include "icsneo/device/extensions/bootloader/chip.h"
+#include "icsneo/device/device.h"
+
+#include <cstdint>
+
+namespace icsneo {
+
+namespace Bootloader {
+
+class FWRepo;
+
+/**
+ * A bootloader protocol for one chip.
+ *
+ * Authentication is a challenge/response handled by libicsbl: icsbl_generate_seed_v1() derives
+ * a challenge (seed.a) and the reply the device must send back (seed.b) from the serial number.
+ * Firmware is encrypted for a specific device with icsbl_encrypt_v1(), also keyed by the serial number.
+ */
+class Communication {
+public:
+	Communication(icsneo::Device& dev) : device(dev) {}
+	virtual ~Communication() = default;
+
+	virtual bool enterApplication() = 0;
+	virtual bool hasFinalizationStep() const = 0;
+	virtual bool finalize() = 0;
+	virtual bool flash(const FWRepo& repo, const icsneo::Device::OpenStatusHandler& handler) = 0;
+
+	virtual bool open() = 0;
+	virtual bool close() = 0;
+
+protected:
+	static uint32_t readLE32(const uint8_t* data);
+	static void writeLE32(uint8_t* data, uint32_t val);
+	icsneo::Device& device;
+};
+
+} // namespace Bootloader
+
+} // namespace icsneo
+
+#endif // __cplusplus
+
+#endif // __BOOTLOADER_COMMUNICATION_H_