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/************************************************************************/

/*                                                                      */

/*  mbus.h -   definitions for the mbus driver                          */

/*                                                                      */

/*                                                                      */

/*  (C) Copyright 1999, Martin Floeer (mfloeer@axcent.de)               */      /*                                                                      */

/*                                                                      */

/************************************************************************/

#ifndef __MBUS_H__

#define __MBUS_H__

#include <linux/ioctl.h>

#ifndef MBUS_MAJOR

#define MBUS_MAJOR 127          /*static definition of major nr.*/

#endif

#ifndef MBUS_NR_DEVS

#define MBUS_NR_DEVS 1

#endif

#define count_t int

#define read_write_t int

#define MBUS_TRANSMIT 0x1

#define MBUS_RECEIVE 0x0

#define MBUS_MASTER 0x1

#define MBUS_SLAVE 0x0

volatile int            MBUS_STATE;             /*  1 = mbus busy */

                                                /*  0 = mbus idle no errror */

                                                /* -1 = mbus idle at last transfer arbitration lost */

                                                /* -2 = mbus idle at last transfer no acknowledge receive */

#define MBUS_STATE_BUSY                                 1

#define MBUS_STATE_IDLE                                 0

#define MBUS_STATE_ARBITRATION_LOST             -1

#define MBUS_STATE_NO_ACKNOWLEDGE               -2

volatile unsigned char                  MBUS_MODE;                      /* true = tranceive : false = receive */

volatile unsigned char                          MBUS_DEST_ADDRESS_BUFFER;       /* Buffer for the slave_address */

volatile unsigned char                  *MBUS_DATA;                             /* Pointer to data */

volatile int                            MBUS_DATA_COUNT;                /* counter for data bytes */

volatile int                            MBUS_DATA_NUMBER;

void mbus_start(unsigned char address,unsigned char clock,char IRQ_LEVEL);

/*

slave_address: slave address

dest_address: dest address

*/

extern void mbus_interrupt(int irq, void *dev_id, struct pt_regs *regs);

extern void mbus_putchar(unsigned char slave_address, unsigned char dest_address, char *data);

extern void mbus_getchar(unsigned char slave_address, unsigned char dest_address, char *data);

extern void mbus_putchars(unsigned char slave_address, unsigned char dest_address, char *data, int number);

typedef struct Mbus_Dev

{

        struct Mbus_Dev *next;

        char *name;

        unsigned int usage;

} Mbus_Dev;

extern int mbus_major;

extern int mbus_nr_devs;

extern struct file_operations mbus_fops;

read_write_t mbus_read(struct inode *inode, struct file *filp, char *buf,

count_t count);

read_write_t mbus_write(struct inode *inode, struct file *filp, char *buf,

count_t count);

#define MBUS_BUSY mbus_busy_event()

extern unsigned char mbus_busy_event(void);

#endif /* __MBUS_H__ */