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Annotation of Net2/arch/i386/isa/comreg.h, revision 1.1

1.1     ! root        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:  *     @(#)comreg.h    7.2 (Berkeley) 5/9/91
        !            34:  */
        !            35: 
        !            36: 
        !            37: /* 16 bit baud rate divisor (lower byte in dca_data, upper in dca_ier) */
        !            38: #define        COMBRD(x)       (1843200 / (16*(x)))
        !            39: 
        !            40: /* interrupt enable register */
        !            41: #define        IER_ERXRDY      0x1
        !            42: #define        IER_ETXRDY      0x2
        !            43: #define        IER_ERLS        0x4
        !            44: #define        IER_EMSC        0x8
        !            45: 
        !            46: /* interrupt identification register */
        !            47: #define        IIR_IMASK       0xf
        !            48: #define        IIR_RXTOUT      0xc
        !            49: #define        IIR_RLS         0x6
        !            50: #define        IIR_RXRDY       0x4
        !            51: #define        IIR_TXRDY       0x2
        !            52: #define        IIR_NOPEND      0x1
        !            53: #define        IIR_MLSC        0x0
        !            54: #define        IIR_FIFO_MASK   0xc0    /* set if FIFOs are enabled */
        !            55: 
        !            56: /* fifo control register */
        !            57: #define        FIFO_ENABLE     0x01
        !            58: #define        FIFO_RCV_RST    0x02
        !            59: #define        FIFO_XMT_RST    0x04
        !            60: #define        FIFO_DMA_MODE   0x08
        !            61: #define        FIFO_TRIGGER_1  0x00
        !            62: #define        FIFO_TRIGGER_4  0x40
        !            63: #define        FIFO_TRIGGER_8  0x80
        !            64: #define        FIFO_TRIGGER_14 0xc0
        !            65: 
        !            66: /* character format control register */
        !            67: #define        CFCR_DLAB       0x80
        !            68: #define        CFCR_SBREAK     0x40
        !            69: #define        CFCR_PZERO      0x30
        !            70: #define        CFCR_PONE       0x20
        !            71: #define        CFCR_PEVEN      0x10
        !            72: #define        CFCR_PODD       0x00
        !            73: #define        CFCR_PENAB      0x08
        !            74: #define        CFCR_STOPB      0x04
        !            75: #define        CFCR_8BITS      0x03
        !            76: #define        CFCR_7BITS      0x02
        !            77: #define        CFCR_6BITS      0x01
        !            78: #define        CFCR_5BITS      0x00
        !            79: 
        !            80: /* modem control register */
        !            81: #define        MCR_LOOPBACK    0x10
        !            82: #define        MCR_IENABLE     0x08
        !            83: #define        MCR_DRS         0x04
        !            84: #define        MCR_RTS         0x02
        !            85: #define        MCR_DTR         0x01
        !            86: 
        !            87: /* line status register */
        !            88: #define        LSR_RCV_FIFO    0x80
        !            89: #define        LSR_TSRE        0x40
        !            90: #define        LSR_TXRDY       0x20
        !            91: #define        LSR_BI          0x10
        !            92: #define        LSR_FE          0x08
        !            93: #define        LSR_PE          0x04
        !            94: #define        LSR_OE          0x02
        !            95: #define        LSR_RXRDY       0x01
        !            96: #define        LSR_RCV_MASK    0x1f
        !            97: 
        !            98: /* modem status register */
        !            99: #define        MSR_DCD         0x80
        !           100: #define        MSR_RI          0x40
        !           101: #define        MSR_DSR         0x20
        !           102: #define        MSR_CTS         0x10
        !           103: #define        MSR_DDCD        0x08
        !           104: #define        MSR_TERI        0x04
        !           105: #define        MSR_DDSR        0x02
        !           106: #define        MSR_DCTS        0x01
        !           107: 
        !           108: /*
        !           109:  * WARNING: Serial console is assumed to be at COM1 address
        !           110:  * and CONUNIT must be 0.
        !           111:  */
        !           112: #define        CONADDR (0x3f8)
        !           113: #define        CONUNIT (0)

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