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#ifndef _FIFO_H
#define _FIFO_H
#include <sys/types.h>
#define FIFO_SIZE 1024
struct fifo {
u_int16_t size; /* actual FIFO size, can be smaller than 'data' */
u_int16_t producer; /* index of producer */
u_int16_t consumer; /* index of consumer */
u_int16_t watermark;
u_int8_t irq;
u_int8_t irq_en;
u_int8_t status;
void (*callback)(struct fifo *fifo, u_int8_t event, void *data);
void *cb_data;
u_int8_t data[FIFO_SIZE];
};
extern int fifo_init(struct fifo *fifo, u_int16_t size,
void (*callback)(struct fifo *fifo, u_int8_t event, void *data), void *cb_data);
extern u_int16_t fifo_data_get(struct fifo *fifo, u_int16_t len, u_int8_t *data);
extern u_int16_t fifo_data_put(struct fifo *fifo, u_int16_t len, u_int8_t *data);
extern int fifo_available(struct fifo *fifo);
#endif
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