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#ifndef _RS232_H
#define _RS232_H
/*[
Name: rs232.h
Derived From: Base 2.0
Author: Paul Huckle
Created On:
Sccs ID: 05/11/94 @(#)rs232.h 1.14
Purpose: Definitions for users of the RS232 Adapter Module
(c)Copyright Insignia Solutions Ltd., 1990. All rights reserved.
]*/
/*
* ============================================================================
* Structure/Data definitions
* ============================================================================
*/
/* register type definitions follow: */
typedef half_word BUFFER_REG;
#ifdef LITTLEND
typedef union {
word all;
struct {
WORD_BIT_FIELD LSByte:8;
WORD_BIT_FIELD MSByte:8;
} byte;
} DIVISOR_LATCH;
#endif
#ifdef BIGEND
typedef union {
word all;
struct {
WORD_BIT_FIELD MSByte:8;
WORD_BIT_FIELD LSByte:8;
} byte;
} DIVISOR_LATCH;
#endif
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD data_available:1;
HALF_WORD_BIT_FIELD tx_holding:1;
HALF_WORD_BIT_FIELD rx_line:1;
HALF_WORD_BIT_FIELD modem_status:1;
HALF_WORD_BIT_FIELD pad:4;
} bits;
} INT_ENABLE_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD pad:4;
HALF_WORD_BIT_FIELD modem_status:1;
HALF_WORD_BIT_FIELD rx_line:1;
HALF_WORD_BIT_FIELD tx_holding:1;
HALF_WORD_BIT_FIELD data_available:1;
} bits;
} INT_ENABLE_REG;
#endif
#if defined(NTVDM) && defined(FIFO_ON)
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD no_int_pending:1;
HALF_WORD_BIT_FIELD interrupt_ID:3;
HALF_WORD_BIT_FIELD pad:2;
HALF_WORD_BIT_FIELD fifo_enabled:2;
} bits;
} INT_ID_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD fifo_enabled:2;
HALF_WORD_BIT_FIELD pad:2;
HALF_WORD_BIT_FIELD interrupt_ID:3;
HALF_WORD_BIT_FIELD no_int_pending:1;
} bits;
} INT_ID_REG;
#endif
#else /* NTVDM */
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD no_int_pending:1;
HALF_WORD_BIT_FIELD interrupt_ID:2;
HALF_WORD_BIT_FIELD pad:5;
} bits;
} INT_ID_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD pad:5;
HALF_WORD_BIT_FIELD interrupt_ID:2;
HALF_WORD_BIT_FIELD no_int_pending:1;
} bits;
} INT_ID_REG;
#endif
#endif /* ifdef NTVDM */
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD word_length:2;
HALF_WORD_BIT_FIELD no_of_stop_bits:1;
HALF_WORD_BIT_FIELD parity_enabled:1;
HALF_WORD_BIT_FIELD even_parity:1;
HALF_WORD_BIT_FIELD stick_parity:1;
HALF_WORD_BIT_FIELD set_break:1;
HALF_WORD_BIT_FIELD DLAB:1;
} bits;
} LINE_CONTROL_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD DLAB:1;
HALF_WORD_BIT_FIELD set_break:1;
HALF_WORD_BIT_FIELD stick_parity:1;
HALF_WORD_BIT_FIELD even_parity:1;
HALF_WORD_BIT_FIELD parity_enabled:1;
HALF_WORD_BIT_FIELD no_of_stop_bits:1;
HALF_WORD_BIT_FIELD word_length:2;
} bits;
} LINE_CONTROL_REG;
#endif
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD DTR:1;
HALF_WORD_BIT_FIELD RTS:1;
HALF_WORD_BIT_FIELD OUT1:1;
HALF_WORD_BIT_FIELD OUT2:1;
HALF_WORD_BIT_FIELD loop:1;
HALF_WORD_BIT_FIELD pad:3;
} bits;
} MODEM_CONTROL_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD pad:3;
HALF_WORD_BIT_FIELD loop:1;
HALF_WORD_BIT_FIELD OUT2:1;
HALF_WORD_BIT_FIELD OUT1:1;
HALF_WORD_BIT_FIELD RTS:1;
HALF_WORD_BIT_FIELD DTR:1;
} bits;
} MODEM_CONTROL_REG;
#endif
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD data_ready:1;
HALF_WORD_BIT_FIELD overrun_error:1;
HALF_WORD_BIT_FIELD parity_error:1;
HALF_WORD_BIT_FIELD framing_error:1;
HALF_WORD_BIT_FIELD break_interrupt:1;
HALF_WORD_BIT_FIELD tx_holding_empty:1;
HALF_WORD_BIT_FIELD tx_shift_empty:1;
#if defined(NTVDM) && defined(FIFO_ON)
HALF_WORD_BIT_FIELD fifo_error:1;
#else
HALF_WORD_BIT_FIELD pad:1;
#endif
} bits;
} LINE_STATUS_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
#if defined(NTVDM) && defined(FIFO_ON)
HALF_WORD_BIT_FIELD fifo_error:1;
#else
HALF_WORD_BIT_FIELD pad:1;
#endif
HALF_WORD_BIT_FIELD tx_shift_empty:1;
HALF_WORD_BIT_FIELD tx_holding_empty:1;
HALF_WORD_BIT_FIELD break_interrupt:1;
HALF_WORD_BIT_FIELD framing_error:1;
HALF_WORD_BIT_FIELD parity_error:1;
HALF_WORD_BIT_FIELD overrun_error:1;
HALF_WORD_BIT_FIELD data_ready:1;
} bits;
} LINE_STATUS_REG;
#endif
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD delta_CTS:1;
HALF_WORD_BIT_FIELD delta_DSR:1;
HALF_WORD_BIT_FIELD TERI:1;
HALF_WORD_BIT_FIELD delta_RLSD:1;
HALF_WORD_BIT_FIELD CTS:1;
HALF_WORD_BIT_FIELD DSR:1;
HALF_WORD_BIT_FIELD RI:1;
HALF_WORD_BIT_FIELD RLSD:1;
} bits;
} MODEM_STATUS_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD RLSD:1;
HALF_WORD_BIT_FIELD RI:1;
HALF_WORD_BIT_FIELD DSR:1;
HALF_WORD_BIT_FIELD CTS:1;
HALF_WORD_BIT_FIELD delta_RLSD:1;
HALF_WORD_BIT_FIELD TERI:1;
HALF_WORD_BIT_FIELD delta_DSR:1;
HALF_WORD_BIT_FIELD delta_CTS:1;
} bits;
} MODEM_STATUS_REG;
#endif
#if defined(NTVDM) && defined(FIFO_ON)
/* refer to NS 16550A data sheet for fifo control register description
DMA is not supported because so far there are not such a COMM adapter with
DMA channel out there
*/
#ifdef BIT_ORDER2
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD enabled:1;
HALF_WORD_BIT_FIELD rx_reset:1;
HALF_WORD_BIT_FIELD tx_reset:1;
HALF_WORD_BIT_FIELD dma_mode_selected:1;
HALF_WORD_BIT_FIELD pad:2;
HALF_WORD_BIT_FIELD trigger_level:2;
} bits;
} FIFO_CONTROL_REG;
#endif
#ifdef BIT_ORDER1
typedef union {
half_word all;
struct {
HALF_WORD_BIT_FIELD trigger_level:2;
HALF_WORD_BIT_FIELD pad:2;
HALF_WORD_BIT_FIELD dma_mode_selected:1
HALF_WORD_BIT_FIELD tx_reset:1;
HALF_WORD_BIT_FIELD rx_reset:1
HALF_WORD_BIT_FIELD enabled:1;
} bits;
} FIFO_CONTROL_REG;
#endif
#endif
/* register select code definitions follow: */
#define RS232_TX_RX 0
#define RS232_IER 1
#define RS232_IIR 2
#if defined(NTVDM) && defined(FIFO_ON)
#define RS232_FIFO 2
#endif
#define RS232_LCR 3
#define RS232_MCR 4
#define RS232_LSR 5
#define RS232_MSR 6
#define RS232_SCRATCH 7
#define RS232_COM1_TIMEOUT (BIOS_VAR_START + 0x7c)
#define RS232_COM2_TIMEOUT (BIOS_VAR_START + 0x7d)
#define RS232_COM3_TIMEOUT (BIOS_VAR_START + 0x7e)
#define RS232_COM4_TIMEOUT (BIOS_VAR_START + 0x7f)
#define RS232_PRI_TIMEOUT (BIOS_VAR_START + 0x7c)
#define RS232_SEC_TIMEOUT (BIOS_VAR_START + 0x7d)
#define GO 0 /* We can emulate requested configuration */
#define NO_GO_SPEED 1 /* We can't emulate requested line speed */
#define NO_GO_LINE 2 /* We can't emulate requested line setup */
#if defined(NTVDM) && defined(FIFO_ON)
/* fifo size defined in NS16550 data sheet */
#define FIFO_SIZE 16
/* the real fifo size in our simulation code. Increase this will get
a better performance(# rx interrupts going down and read call count to
the serial driver also going down). However, if application is using
h/w handshaking, we may still delivery extra chars to it. This may provoke
the app. By using 16bytes fifo, we are safe because the application
must have logic to handle it.
*/
#define FIFO_BUFFER_SIZE FIFO_SIZE
#endif
#define OFF 0
#define ON 1
#define LEAVE_ALONE 2
#define change_state(external_state, internal_state) \
((external_state == internal_state) ? LEAVE_ALONE : external_state)
#if defined(NTVDM) && defined(FIFO_ON)
#define FIFO_INT 6 /* fifo rda time out interrupt ID */
#endif
#define RLS_INT 3 /* receiver line status interrupt ID */
#define RDA_INT 2 /* data available interrupt ID */
#define THRE_INT 1 /* tx holding register empty interrupt ID */
#define MS_INT 0 /* modem status interrupt ID */
#define DATA5 0 /* line control setting for five data bits */
#define DATA6 1 /* line control setting for six data bits */
#define DATA7 2 /* line control setting for seven data bits */
#define DATA8 3 /* line control setting for eight data bits */
#define STOP1 0 /* line control setting for one stop bit */
#define STOP2 1 /* line control setting for one and a half or two
stop bits */
#ifdef NTVDM
// collision with winbase.h PARITY_ON define
#define PARITYENABLE_ON 1 /* line control setting for parity enabled */
#define PARITYENABLE_OFF 0 /* line control setting for parity disabled */
#else
#define PARITY_ON 1 /* line control setting for parity enabled */
#define PARITY_OFF 0 /* line control setting for parity disabled */
#endif
#ifdef NTVDM
// collision with winbase.h PARITY_ODD define
#define EVENPARITY_ODD 0 /* line control setting for odd parity */
#define EVENPARITY_EVEN 1 /* line control setting for even parity */
#else
#define PARITY_ODD 0 /* line control setting for odd parity */
#define PARITY_EVEN 1 /* line control setting for even parity */
#endif
#define PARITY_STICK 1 /* line control setting for stick(y) parity */
#define PARITY_FIXED 2 /* Internal state setting for fixed parity */
#define COM1 0
#define COM2 1
#if (NUM_SERIAL_PORTS > 2)
#define COM3 2
#define COM4 3
#endif
#if defined(NTVDM) && defined(FIFO_ON)
typedef struct _FIFORXDATA{
half_word data;
half_word error;
}FIFORXDATA, *PFIFORXDATA;
#endif
/*
* ============================================================================
* External declarations and macros
* ============================================================================
*/
extern void com_init IPT1(int, adapter);
extern void com_post IPT1(int, adapter);
extern void com_flush_printer IPT1(int, adapter);
extern void com_inb IPT2(io_addr, port, half_word *, value);
extern void com_outb IPT2(io_addr, port, half_word, value);
extern void com_recv_char IPT1(int, adapter);
extern void recv_char IPT1(long, adapter);
extern void com_modem_change IPT1(int, adapter);
extern int com_save_rxbytes IPT2(int,n, CHAR *,buf);
extern int com_save_txbyte IPT1(CHAR,value);
#ifdef PS_FLUSHING
extern void com_psflush_change IPT2(IU8,hostID, IBOOL,apply);
#endif /* PS_FLUSHING */
#ifdef NTVDM
extern void com_lsr_change(int adapter);
extern void SyncBaseLineSettings(int adapter,DIVISOR_LATCH *divisor_latch,
LINE_CONTROL_REG *LCR_reg);
extern void tx_shift_register_empty(int adapter);
extern void tx_holding_register_empty(int adapter);
#endif
#if (NUM_SERIAL_PORTS > 2)
#define adapter_for_port(port) \
(((port & 0x300) == 0x300) ? \
(((port & 0xf8) == 0xf8) ? COM1 : COM3) \
: \
(((port & 0xf8) == 0xf8) ? COM2 : COM4))
#ifdef SHORT_TRACE
#define id_for_adapter(adapter) (adapter + '1')
#endif
#else
#define adapter_for_port(port) (((port) >= RS232_PRI_PORT_START && (port) <= RS232_PRI_PORT_END) ? COM1 : COM2)
#ifdef SHORT_TRACE
#define id_for_adapter(adapter) (adapter == COM1 ? 'P' : 'S')
#endif
#endif /* more than 2 serial ports */
#ifdef IRET_HOOKS
/*
* A macro we need for IRET hooks, the number of bits in a an async
* character on a comms line, which is about 8 (for the character)
* plus two stop bits.
*/
#define BITS_PER_ASYNC_CHAR 10
#endif /* IRET_HOOKS */
/* BCN 2730 define generic macros which can be SVID3 or old style
* in either case the structure used should be a termios
*/
#ifdef SVID3_TCGET
#define TCGET TCGETS
#define TCSET TCSETS
#define TCSETF TCSETSF
#else
#define TCGET TCGETA
#define TCSET TCSETA
#define TCSETF TCSETAF
#endif /* SVID3_TCGET */
#endif /* _RS232_H */
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