/*
 * Copyright (C) 2022, 2023 - Tillitis AB
 * SPDX-License-Identifier: GPL-2.0-only
 */

#include <stddef.h>
#include <stdint.h>

#ifndef PROTO_H
#define PROTO_H

enum endpoints {
	DST_HW_IFPGA,
	DST_HW_AFPGA,
	DST_FW,
	DST_SW
};

enum cmdlen {
	LEN_1,
	LEN_4,
	LEN_32,
	LEN_128
};

#define CMDLEN_MAXBYTES 128

// clang-format off
enum fwcmd {
	FW_CMD_NAME_VERSION		= 0x01,
	FW_RSP_NAME_VERSION		= 0x02,
	FW_CMD_LOAD_APP			= 0x03,
	FW_RSP_LOAD_APP			= 0x04,
	FW_CMD_LOAD_APP_DATA		= 0x05,
	FW_RSP_LOAD_APP_DATA		= 0x06,
	FW_RSP_LOAD_APP_DATA_READY	= 0x07,
	FW_CMD_GET_UDI			= 0x08,
	FW_RSP_GET_UDI			= 0x09,
	FW_CMD_MAX                      = 0x0a,
	FW_CMD_LOAD_APP_FLASH		= 0xF0,
	FW_RSP_LOAD_APP_FLASH		= 0xF1,
};
// clang-format on

enum status {
	STATUS_OK,
	STATUS_BAD
};

struct frame_header {
	uint8_t id;
	enum endpoints endpoint;
	enum cmdlen len;
};

/*@ -exportlocal @*/
void writebyte(uint8_t b);
uint8_t readbyte(void);
void fwreply(struct frame_header hdr, enum fwcmd rspcode, uint8_t *buf);
int readcommand(struct frame_header *hdr, uint8_t *cmd, int state);
void write(uint8_t *buf, size_t nbytes);
#endif