The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/lptreg.h

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    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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