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/i386/isa/sioreg.h

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    1 /*-
    2  * Copyright (c) 1991 The Regents of the University of California.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   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 the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      from: @(#)comreg.h      7.2 (Berkeley) 5/9/91
   34  * $FreeBSD: src/sys/i386/isa/sioreg.h,v 1.4.4.2 1999/09/05 08:13:32 peter Exp $
   35  */
   36 
   37 
   38 /* 16 bit baud rate divisor (lower byte in dca_data, upper in dca_ier) */
   39 #define COMBRD(x)       (1843200 / (16*(x)))
   40 
   41 /* interrupt enable register */
   42 #define IER_ERXRDY      0x1
   43 #define IER_ETXRDY      0x2
   44 #define IER_ERLS        0x4
   45 #define IER_EMSC        0x8
   46 
   47 /* interrupt identification register */
   48 #define IIR_IMASK       0xf
   49 #define IIR_RXTOUT      0xc
   50 #define IIR_RLS         0x6
   51 #define IIR_RXRDY       0x4
   52 #define IIR_TXRDY       0x2
   53 #define IIR_NOPEND      0x1
   54 #define IIR_MLSC        0x0
   55 #define IIR_FIFO_MASK   0xc0    /* set if FIFOs are enabled */
   56 
   57 /* fifo control register */
   58 #define FIFO_ENABLE     0x01
   59 #define FIFO_RCV_RST    0x02
   60 #define FIFO_XMT_RST    0x04
   61 #define FIFO_DMA_MODE   0x08
   62 #define FIFO_RX_LOW     0x00
   63 #define FIFO_RX_MEDL    0x40
   64 #define FIFO_RX_MEDH    0x80
   65 #define FIFO_RX_HIGH    0xc0
   66 
   67 /* character format control register */
   68 #define CFCR_DLAB       0x80
   69 #define CFCR_SBREAK     0x40
   70 #define CFCR_PZERO      0x30
   71 #define CFCR_PONE       0x20
   72 #define CFCR_PEVEN      0x10
   73 #define CFCR_PODD       0x00
   74 #define CFCR_PENAB      0x08
   75 #define CFCR_STOPB      0x04
   76 #define CFCR_8BITS      0x03
   77 #define CFCR_7BITS      0x02
   78 #define CFCR_6BITS      0x01
   79 #define CFCR_5BITS      0x00
   80 
   81 /* modem control register */
   82 #define MCR_LOOPBACK    0x10
   83 #define MCR_IENABLE     0x08
   84 #define MCR_DRS         0x04
   85 #define MCR_RTS         0x02
   86 #define MCR_DTR         0x01
   87 
   88 /* line status register */
   89 #define LSR_RCV_FIFO    0x80
   90 #define LSR_TSRE        0x40
   91 #define LSR_TXRDY       0x20
   92 #define LSR_BI          0x10
   93 #define LSR_FE          0x08
   94 #define LSR_PE          0x04
   95 #define LSR_OE          0x02
   96 #define LSR_RXRDY       0x01
   97 #define LSR_RCV_MASK    0x1f
   98 
   99 /* modem status register */
  100 #define MSR_DCD         0x80
  101 #define MSR_RI          0x40
  102 #define MSR_DSR         0x20
  103 #define MSR_CTS         0x10
  104 #define MSR_DDCD        0x08
  105 #define MSR_TERI        0x04
  106 #define MSR_DDSR        0x02
  107 #define MSR_DCTS        0x01
  108 
  109 /*
  110  * WARNING: Serial console is assumed to be at COM1 address
  111  * and CONUNIT must be 0.
  112  *
  113  * Well, maybe not...
  114  */
  115 #ifndef CONADDR
  116 #define CONADDR (0x3F8)
  117 #endif
  118 
  119 #ifndef CONUNIT
  120 #define CONUNIT (0)
  121 #endif
  122 
  123 #ifndef CONSPEED
  124 #define CONSPEED (9600)
  125 #endif

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