/**
 * rt_com
 * ======
 *
 * RT-Linux kernel module for communication across serial lines.
 *
 * Copyright (C) 1997 Jens Michaelsen
 * Copyright (C) 1997-1999 Jochen Küpper
 * Copyright (C) 1999 Hua Mao <hmao@nmt.edu>
 */



#ifndef RT_COM_P_H
#define RT_COM_P_H





/* 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






/*-----------------------------------------------------------------------*/
#define BASE_BAUD 115200
#define STD_COM_FLAG 0


#endif /* RT_COM_P_H */



/**
 * Local Variables:
 * mode: C
 * c-file-style: "Stroustrup"
 * End:
 */