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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [char/] [mbus.h] - Rev 1626
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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__ */
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