//
// si/controller.h: Serial interface controller.
//
// CEN64: Cycle-Accurate Nintendo 64 Emulator.
// Copyright (C) 2015, Tyler J. Stachecki.
//
// This file is subject to the terms and conditions defined in
// 'LICENSE', which is part of this source code package.
//

#ifndef __si_controller_h__
#define __si_controller_h__
#include "common.h"
#include "local_time.h"
#include "si/pak.h"
#include "dd/controller.h"

enum si_register {
#define X(reg) reg,
#include "si/registers.md"
#undef X
  NUM_SI_REGISTERS
};

#ifdef DEBUG_MMIO_REGISTER_ACCESS
extern const char *si_register_mnemonics[NUM_SI_REGISTERS];
#endif

struct eeprom {
  uint8_t *data;
  size_t size;
};

struct rtc {
  uint16_t control;
  struct time_stamp now;
  int32_t offset_seconds;
};

struct si_controller {
  struct bus_controller *bus;
  const uint8_t *rom;
  uint8_t command[64];
  uint8_t ram[64];

  uint32_t regs[NUM_SI_REGISTERS];
  uint32_t pif_status;
  uint8_t input[4];
  struct eeprom eeprom;
  struct rtc rtc;
  struct controller controller[4];
};

cen64_cold int si_init(struct si_controller *si, struct bus_controller *bus,
  const uint8_t *pif_rom, const uint8_t *cart_rom,
  const struct dd_variant *dd_variant,
  uint8_t *eeprom, size_t eeprom_size,
  const struct controller *controller);

int read_pif_rom_and_ram(void *opaque, uint32_t address, uint32_t *word);
int write_pif_rom_and_ram(void *opaque, uint32_t address, uint32_t word, uint32_t dqm);

int read_si_regs(void *opaque, uint32_t address, uint32_t *word);
int write_si_regs(void *opaque, uint32_t address, uint32_t word, uint32_t dqm);

#endif