/*
Copyright (C) Magna Carta Software, Inc. 1988-1991.  All Rights Reserved
C COMMUNICATIONS TOOLKIT
INS8250.H -- C Telecommunications Toolkit header file for
INS 8250/8250A/8250B/16450/NS16550x
*/

#if !defined(INS8250_H_INCLUDED)

#define INS8250                 1   /* Denotes an 8250/16450 family UART */
#define NS16550A                3   /* Denotes an NS16550A UART */

#define U8250_OUT1_MASK         4   /* modem control reg. 00000100  */
#define U8250_OUT2_MASK         8   /* modem control reg. 00001000  */
#define U8250_LOOP_MASK       0X10  /* modem control reg. 00010000  */
#define U8250_DCTS_MASK       0X1   /* modem status  reg. 00000001  */
#define U8250_DDSR_MASK       0X2   /* modem status  reg. 00000010  */
#define U8250_DRI_MASK        0X4   /* modem status  reg. 00000100  */
#define U8250_DDCD_MASK       0X8   /* modem status  reg. 00001000  */

/* REGISTER LOCATIONS */
#define U8250_RBR_OFF           0   /* offset of UART data port from base   */
#define U8250_THR_OFF           0   /* offset of UART data port from base   */
#define U8250_IER_OFF           1   /* offset of UART int. enable from base */
#define U8250_IID_OFF           2   /* offset of UART int. id.    from base */
#define U8250_LCR_OFF           3   /* offset of UART line contrl from base */
#define U8250_MCR_OFF           4   /* offset of UART modem ctl.  from base */
#define U8250_LSR_OFF           5   /* offset of UART line status from base */
#define U8250_MSR_OFF           6   /* offset of UART modem stst. from base */
#define U8250_SR_OFF            7   /* offset of UART modem stst. from base */

/* UART INTERRUPT ENABLE TYPES -- INS8250 ONLY */
#define U8250_RX_DATA_AVAILABLE     1
#define U8250_TX_BUFFER_EMPTY       2
#define U8250_LINE_STATUS           4
#define U8250_MODEM_STATUS          8


#if defined(CCT_DEVELOPMENT)
    /* DATA FORMATS */
    #define U8250_DATABITS5            0
    #define U8250_DATABITS6            1    /* 0000 0001 */
    #define U8250_DATABITS7            2    /* 0000 0010 */
    #define U8250_DATABITS8            3    /* 0000 0011 */

    #define U8250_STOPBITS1            0
    #define U8250_STOPBITS15           4    /* 0000 0100 */
    #define U8250_STOPBITS2            4    /* 0000 0100 */

    #define U8250_PARITY_NONE          0
    #define U8250_PARITY_ODD           8    /* 0000 1000 */
    #define U8250_PARITY_EVEN       0X18    /* 0001 1000 */
    #define U8250_PARITY_MARK       0X28    /* 0010 1000 */
    #define U8250_PARITY_SPACE      0X38    /* 0011 1000 */

    #define U8250_RX_MASK           1   /* UART receive ready mask          */
    #define U8250_TX_MASK        0X20   /* UART transmit ready mask         */
    #define U8250_DATABITS_MASK  0X03   /* line control reg. = 00000011     */
    #define U8250_PARITY_MASK    0X38   /* line control reg. = 00111000     */
    #define U8250_STOPBITS_MASK  0X04   /* line control reg. = 00000100     */


    /* RS-232 FUNCTIONS */
    #define U8250_BREAK             1
    #define U8250_DTR_MASK          1   /* modem control reg. 00000001  */
    #define U8250_RTS_MASK          2   /* modem control reg. 00000010  */
    #define U8250_BREAK_MASK     0XBF   /* line  control reg. 01000000  */
    #define U8250_CTS_MASK       0X10   /* modem status  reg. 00010000  */
    #define U8250_DSR_MASK       0X20   /* modem status  reg. 00100000  */
    #define U8250_RI_MASK        0X40   /* modem status  reg. 01000000  */
    #define U8250_DCD_MASK       0X80   /* modem status  reg. 10000000  */
    #define U8250_IN1_MASK       NULL   /* not supported on PC          */
    #define U8250_IN2_MASK         -1   /* not supported on PC          */
#endif

short   FCALL_ isauart(WORD addr);
short   FCALL_ set_16550_threshold(COMM_PORT *p, WORD count);
short   FCALL_ u8250_deinit_(COMM_PORT *p);
short   FCALL_ u8250_deinstall_ipr_(COMM_PORT *p, WORD itype);
short   FCALL_ u8250_disable_comm_int_(COMM_PORT *p_port, WORD int_type);
short   FCALL_ u8250_enable_comm_int_(COMM_PORT  *p_port, WORD int_type);
short   FCALL_ u8250_get_(COMM_PORT *p, short cmd);
short   FCALL_ u8250_get_reg_(WORD reg, WORD mask);
short   FCALL_ u8250_get_rx_xlat_(COMM_PORT *p, short item);
long    FCALL_ u8250_get_speed_(COMM_PORT *p_port);
short   FCALL_ u8250_get_tx_xlat_(COMM_PORT *p, short item);
short   FCALL_ u8250_init(COMM_PORT *p, WORD addr, long speed, short databits,
    short parity, short stopbits);
short   FCALL_ u8250_install_ipr_(COMM_PORT *p,  WORD type, void FAR_ *fn, BYTE FAR_ *buf, WORD len);
short   FCALL_ u8250_int_set_(COMM_PORT *p_port, WORD type, WORD state);
void    FCALL_ u8250_iwrite_(COMM_PORT *p_port, short c);
void    FCALL_ u8250_mod_reg_(WORD reg, WORD mask, WORD value);
#define u8250_set_reg_(a, b)     u8250_mod_reg_((a), 0X0, (b))
short   FCALL_ u8250_read_(COMM_PORT *p_port);
void    FCALL_ u8250_restore_status_(COMM_PORT *p);
short   FCALL_ u8250_rxstat_(COMM_PORT *p_port);
void    FCALL_ u8250_save_status_(COMM_PORT *p);
short   FCALL_ u8250_set_(COMM_PORT *p, short cmd, short value);
short   FCALL_ u8250_send_break_(COMM_PORT *p_port);
short   FCALL_ u8250_set_databits_(COMM_PORT *p_port, short value);
short   FCALL_ u8250_set_parity_(COMM_PORT *p_port, short value);
short   FCALL_ u8250_set_rx_xlat_(COMM_PORT *p, short item, short value);
short   FCALL_ u8250_set_speed_(COMM_PORT *p_port, long value);
short   FCALL_ u8250_set_stopbits_(COMM_PORT *p_port, short value);
short   FCALL_ u8250_set_tx_xlat_(COMM_PORT *p, short item, short value);
short   FCALL_ u8250_txstat_(COMM_PORT *p_port);
void    FCALL_ u8250_write_(COMM_PORT *p_port, WORD c);

#define INS8250_H_INCLUDED
#endif