2 * Copyright (c) 1992, 1993, 1996
3 * Berkeley Software Design, Inc. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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9 * notice, this list of conditions and the following disclaimer.
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11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Berkeley Software
18 * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
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23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 * BSDI com.h,v 2.2 1996/04/08 19:32:21 bostic Exp
32 * $FreeBSD: src/usr.bin/doscmd/com.h,v 1.2.2.1 2002/04/25 11:04:50 tg Exp $
33 * $DragonFly: src/usr.bin/doscmd/com.h,v 1.2 2003/06/17 04:29:25 dillon Exp $
36 /* com.h for doscmd int14.c */
38 /* NS16550A register definitions */
40 /* interrupt enable register */
42 #define IE_NOP 0xF0 /* Not used */
43 #define IE_MODEM_STAT 0x08 /* modem status int. */
44 #define IE_LINE_STAT 0x04 /* receiver-line status int. */
45 #define IE_TRANS_HLD 0x02 /* transmitter holding register empty int. */
46 #define IE_RCV_DATA 0x01 /* received data available int. */
48 /* interrupt identification register */
50 #define II_FIFOS_EN 0xC0 /* if FIFOs are enabled */
51 #define II_NOP 0x30 /* not used */
52 #define II_INT_ID 0x0E /* mask: bits see below */
53 #define II_PEND_INT 0x01 /* 1=no interrupt pending */
55 /* bit masks for II_INT_ID */
58 #define II_LINE_STAT 0x06
59 #define II_RCV_DATA 0x04
60 #define II_TRANS_HLD 0x02
61 #define II_MODEM_STAT 0x00
63 /* FIFO control reg */
65 #define FC_FIFO_SZ_MASK 0xC0
66 #define FC_FIFO_1B 0x80
67 #define FC_FIFO_4B 0x40
68 #define FC_FIFO_8B 0x80
69 #define FC_FIFO_14B 0xC0
70 #define FC_FIFO_CTR 0x04
71 #define FC_FIFO_CRV 0x02
72 #define FC_FIFO_EN 0x01
74 /* line control register */
76 #define LC_DIV_ACC 0x80 /* divisor latch access bit */
77 #define LC_BRK_CTRL 0x40 /* set break control */
78 #define LC_S_PAR 0x20 /* stick parity */
79 #define LC_EVEN_P 0x10 /* even parity select */
80 #define LC_PAR_E 0x08 /* parity enable */
81 #define LC_STOP_B 0x04 /* number of stop bits (0 - 1 bit) */
82 #define LC_W_LEN 0x03 /* unsigned short length (00 - 5, 01 - 6 etc.) */
84 /* line status register */
86 #define LS_NOP 0x80 /* not used */
87 #define LS_X_DATA_E 0x40 /* 1=empty */
88 #define LS_X_HOLD_E 0x20 /* 1=empty */
89 #define LS_BREAK 0x10 /* break received */
90 #define LS_FRM_ERR 0x08 /* framing error */
91 #define LS_PAR_ERR 0x04 /* parity error */
92 #define LS_OVRN_ERR 0x02 /* overrun error */
93 #define LS_RCV_DATA_RD 0x01 /* data received */
95 /* modem status register */
97 #define MS_DCD 0x80 /* Data Carrier Detect in */
98 #define MS_RI 0x40 /* Ring Indicator in */
99 #define MS_DSR 0x20 /* Data Set Ready in */
100 #define MS_CTS 0x10 /* Clear To Send in */
101 #define MS_DELTA_DCD 0x08 /* Data Carrier Detect changed state */
102 #define MS_DELTA_RI 0x04 /* Ring Indicator changed state */
103 #define MS_DELTA_DSR 0x02 /* Data Set Ready changed state */
104 #define MS_DELTA_CTS 0x01 /* Clear To Send changed state */
106 /* DOS definitions -- parameters */
108 #define BITRATE_110 0x00
109 #define BITRATE_150 0x20
110 #define BITRATE_300 0x40
111 #define BITRATE_600 0x60
112 #define BITRATE_1200 0x80
113 #define BITRATE_2400 0xA0
114 #define BITRATE_4800 0xC0
115 #define BITRATE_9600 0xE0
116 #define PARITY_NONE 0x00
117 #define PARITY_ODD 0x08
118 #define PARITY_EVEN 0x18
119 #define STOPBIT_1 0x00
120 #define STOPBIT_2 0x04
121 #define TXLEN_7BITS 0x02
122 #define TXLEN_8BITS 0x03
124 #define N_OF_COM_REGS 8
126 /* DOS definitions -- return codes */
128 #define LS_SW_TIME_OUT LS_NOP /* return value used by DOS */
130 /* routine declarations */
132 void int14(regcontext_t *REGS);
133 void init_com(int, char *, int, unsigned char);
135 /* end of file com.h */