#ifndef GB_H
#define GB_H
#include <r_io.h>

enum {
	GB_TIMERS_DIV = 0,
	GB_TIMERS_TIMA,
	GB_TIMERS_TMA,
	GB_TIMERS_TAC,
};

typedef struct gb_timers_t {
	ut64 seek;
	ut32 fd;
	ut16 odiv;
	ut16 div;
	ut8 buf[4];
	ut8 otma;
	st8 tima_wait;
	bool check_fedge;
} GBTimers;

GBTimers *gb_timers_open(RIO *io);
void gb_timers_update(GBTimers *timers, ut32 cycles);
void gb_timers_close(GBTimers *timers, RIO *io);

typedef struct gb_joypad_t {
	ut8 *keys;
	int fd;
	ut16 up;
	ut16 down;
	ut16 left;
	ut16 right;
	ut16 a;
	ut16 b;
	ut16 start;
	ut16 select;
	ut8 data;
	ut8 odata;
} GBJoypad;

GBJoypad *gb_joypad_open(RIO *io);
void gb_joypad_update(GBJoypad *joypad);
void gb_joypad_close(GBJoypad *joypad, RIO *io);

typedef struct gb_dma_t {
	int dma_fd;	//fd representing the dma register
	int dma_bus_fd;	//fd representing the memory bus while dma occupies it
	ut16 bus_occupancy_size;
	ut8 buf[0xa0];
	ut8 dst;	//current dst addr low byte
	ut8 todo;	//cycles todo
	ut8 frontrun;	//cycles that read/write ops had frontrun the dma copy
	ut8 val;
} GBDMA;

GBDMA *gb_dma_open(RIO *io);
void gb_dma_update(GBDMA *dma, RIO *io, ut32 cycles);
void gb_dma_close(GBDMA *dma, RIO *io);

extern RIOPlugin r_io_plugin_gb_timers;
extern RIOPlugin r_io_plugin_gb_mbc1;
extern RIOPlugin r_io_plugin_gb_mbc2;
extern RIOPlugin r_io_plugin_gb_joypad;

#endif