FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/lptreg.h
1 /* $NetBSD: lptreg.h,v 1.10 2006/05/02 08:31:02 martin Exp $ */
2
3 /*-
4 * Copyright (c) 1990 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * William Jolitz.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)lptreg.h 1.1 (Berkeley) 12/19/90
35 */
36
37 /*
38 * AT Parallel Port (for lineprinter)
39 * Interface port and bit definitions
40 * Written by William Jolitz 12/18/90
41 * Copyright (C) William Jolitz 1990
42 */
43
44 /*
45 * On a standard DB25 parallel port, the bits show up as follows:
46 *
47 * 13 12 11 10 9 8 7 6 5 4 3 2 1
48 * S4 S5 ~S7 S6 D7 D6 D5 D4 D3 D2 D1 D0 ~C0
49 *
50 * G G G G G G G G ~C3 C2 S3 ~C1
51 * 25 24 23 22 21 20 19 18 17 16 15 14
52 *
53 * D7-D0 are output bits from the data register
54 * S7-S3 are input bits read at the status register
55 * C3-C0 are output bits from the control register
56 */
57
58 #define lpt_data 0 /* Data to/from printer (R/W) */
59
60 #define lpt_status 1 /* Status of printer (R) */
61 #define LPS_NERR 0x08 /* printer no error */
62 #define LPS_SELECT 0x10 /* printer selected */
63 #define LPS_NOPAPER 0x20 /* printer out of paper */
64 #define LPS_NACK 0x40 /* printer no ack of data */
65 #define LPS_NBSY 0x80 /* printer not busy */
66
67 #define lpt_control 2 /* Control printer (R/W) */
68 #define LPC_STROBE 0x01 /* strobe data to printer */
69 #define LPC_AUTOLF 0x02 /* automatic linefeed */
70 #define LPC_NINIT 0x04 /* initialize printer */
71 #define LPC_SELECT 0x08 /* printer selected */
72 #define LPC_IENABLE 0x10 /* printer out of paper */
73
74 #define LPT_NPORTS 4
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