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/*
* Copyright (c) 1992, 1993, 1996
* Berkeley Software Design, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Berkeley Software
* Design, Inc.
*
* THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* BSDI com.h,v 2.2 1996/04/08 19:32:21 bostic Exp
*
* $FreeBSD$
*/
/* com.h for doscmd int14.c */
#define BUFSIZE 1024
/* NS16550A register definitions */
/* interrupt enable register */
#define IE_NOP 0xF0 /* not used */
#define IE_MODEM_STAT 0x08 /* modem status int. */
#define IE_LINE_STAT 0x04 /* receiver-line status int. */
#define IE_TRANS_HLD 0x02 /* transmitter holding register empty int. */
#define IE_RCV_DATA 0x01 /* received data available int. */
/* interrupt identification register */
#define II_FIFOS_EN 0xC0 /* if FIFOs are enabled */
#define II_NOP 0x38 /* not used */
#define II_INT_ID 0x06 /* mask: bits see below */
#define II_PEND_INT 0x01 /* 1=no interrupt pending */
/* bit masks for II_INT_ID */
#define II_LINE_STAT 0x06
#define II_RCV_DATA 0x04
#define II_TRANS_HLD 0x02
#define II_MODEM_STAT 0x00
/* FIFO control reg */
#define FC_FIFO_EN 0x01
/* line control register */
#define LC_DIV_ACC 0x80 /* divisor latch access bit */
#define LC_BRK_CTRL 0x40 /* set break control */
#define LC_S_PAR 0x20 /* stick parity */
#define LC_EVEN_P 0x10 /* even parity select */
#define LC_PAR_E 0x08 /* parity enable */
#define LC_STOP_B 0x04 /* number of stop bits (0 - 1 bit) */
#define LC_W_LEN 0x03 /* unsigned short length (00 - 5, 01 - 6 etc.) */
/* line status register */
#define LS_NOP 0x80 /* not used */
#define LS_X_SHFT_E 0x40 /* 0=data transfer, 1=transmitter idle */
#define LS_X_HOLD_E 0x20 /* 0=ready, 1=transferring character */
#define LS_BREAK 0x10 /* break received */
#define LS_FRM_ERR 0x08 /* framing error */
#define LS_PAR_ERR 0x04 /* parity error */
#define LS_OVRN_ERR 0x02 /* overrun error */
#define LS_RCV_DATA_RD 0x01 /* data received */
/* modem status register */
#define MS_DCD 0x80 /* Data Carrier Detect in */
#define MS_RI 0x40 /* Ring Indicator in */
#define MS_DSR 0x20 /* Data Set Ready in */
#define MS_CTS 0x10 /* Clear To Send in */
#define MS_DELTA_DCD 0x08 /* Data Carrier Detect changed state */
#define MS_DELTA_RI 0x04 /* Ring Indicator changed state */
#define MS_DELTA_DSR 0x02 /* Data Set Ready changed state */
#define MS_DELTA_CTS 0x01 /* Clear To Send changed state */
/* data structure definitions */
#define N_OF_COM_REGS 8
struct com_data_struct {
int fd; /* BSD/386 file descriptor */
char *path; /* BSD/386 pathname */
int addr; /* ISA I/O address */
unsigned char irq; /* ISA IRQ */
unsigned char flags; /* some general software flags */
struct queue *com_queue; /* XXX DEBUG obsolete MCL? */
unsigned char div_latch[2]; /* mirror of 16550 R0':R1' read/write */
unsigned char last_char_read; /* mirror of 16550 R0 read only */
unsigned char int_enable; /* mirror of 16550 R1 read/write */
unsigned char int_id; /* mirror of 16550 R2 read only */
unsigned char fifo_ctrl; /* mirror of 16550 R2 write only */
unsigned char line_ctrl; /* mirror of 16550 R3 read/write */
unsigned char modem_ctrl; /* mirror of 16550 R4 read/write */
unsigned char line_stat; /* mirror of 16550 R5 read/write */
unsigned char modem_stat; /* mirror of 16550 R6 read/write */
unsigned char uart_spare; /* mirror of 16550 R7 read/write */
};
/* DOS definitions -- parameters */
#define BITRATE_110 0x00
#define BITRATE_150 0x20
#define BITRATE_300 0x40
#define BITRATE_600 0x60
#define BITRATE_1200 0x80
#define BITRATE_2400 0xA0
#define BITRATE_4800 0xC0
#define BITRATE_9600 0xE0
#define PARITY_NONE 0x00
#define PARITY_ODD 0x08
#define PARITY_EVEN 0x18
#define STOPBIT_1 0x00
#define STOPBIT_2 0x04
#define TXLEN_7BITS 0x02
#define TXLEN_8BITS 0x03
/* DOS definitions -- return codes */
#define LS_SW_TIME_OUT LS_NOP /* return value used by DOS */
/* miscellaneous definitions */
#define DIV_LATCH_LOW 0
#define DIV_LATCH_HIGH 1
#define DIV_LATCH_LOW_WRITTEN 0x01
#define DIV_LATCH_HIGH_WRITTEN 0x02
#define DIV_LATCH_BOTH_WRITTEN 0x03
/* variable declarations */
extern int errno;
/* routine declarations */
extern void int14(regcontext_t *REGS);
extern void com_set_line(struct com_data_struct *, unsigned char, unsigned char);
extern void init_com(int, char *, int, unsigned char);
extern u_char com_port_in(int);
extern void com_port_out(int, unsigned char);
/* end of file com.h */
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