/** * rt_com * ====== * * RT-Linux kernel module for communication across serial lines. * * Copyright (C) 1997 Jens Michaelsen * Copyright (C) 1997-1999 Jochen K黳per * Copyright (C) 1999 Hua Mao <hmao@nmt.edu> */#ifndef RT_COM_P_H#define RT_COM_P_H/* private functions */#ifdef RTLINUX_V1static void rt_com0_isr( void );static inline void rt_com_isr( unsigned int );#elsestatic unsigned int rt_com0_isr( unsigned int, struct pt_regs * );static unsigned int rt_com_isr( unsigned int, struct pt_regs * );#endif/* number of bytes in port FIFO when a DATA_READY interrupt shall occur */#define FIFO_TRIGGER 8/* status masks */#define DATA_READY   0x01     /* not an error               */#define OVERRUN      0x02     /* error detected by hardware */#define PARITY       0x04     /* error detected by hardware */#define FRAME        0x08     /* error detected by hardware */#define BREAK        0x10     /* not an error               */#define BUFFER_FULL  0x80     /* error detected by software */#define TXB_EMPTY    0x20     /* not an error               */#define HARD_ERROR   (OVERRUN | PARITY | FRAME | BREAK)/* port register offsets */#define RT_COM_RXB  0x00#define RT_COM_TXB  0x00#define RT_COM_IER  0x01#define RT_COM_IIR  0x02#define RT_COM_FCR  0x02#define RT_COM_LCR  0x03#define RT_COM_MCR  0x04#define RT_COM_LSR  0x05#define RT_COM_MSR  0x06#define RT_COM_DLL  0x00#define RT_COM_DLM  0x01/* bit masks which may be written to the MCR using ModemControl */#define RT_COM_DTR          0x01     /* data Terminal Ready        */#define RT_COM_RTS          0x02     /* Request To Send            */#define RT_COM_Out1         0x04#define RT_COM_Out2         0x08#define RT_COM_LoopBack     0x10/* data buffer - organized as a FIFO */struct rt_buf_struct{	int  head;	int  tail;	char buf[ RT_COM_BUF_SIZ ];};#ifdef CONFIG_SMPspinlock_t rt_com_spinlock = SPIN_LOCK_UNLOCKED;#define RTL_SPIN_LOCK rt_com_spinlock#endif#define rt_com_irq_off( state )         rtl_critical( state )#define rt_com_irq_on(state)            rtl_end_critical( state )/* information about handled ports */struct rt_com_struct{	int magic;	int baud_base;	int port;	int irq;	int flag;#ifdef RTLINUX_V1	void (*isr)(void);#else	unsigned int (*isr)( unsigned int num, struct pt_regs *r);#endif	int type;  	int ier;  /* copy of chip register */	struct rt_buf_struct ibuf;	struct rt_buf_struct obuf;};/*-----------------------------------------------------------------------*/#define BASE_BAUD 115200#define STD_COM_FLAG 0#endif /* RT_COM_P_H *//** * Local Variables: * mode: C * c-file-style: "Stroustrup" * End: */