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Annotation of Net2/arch/i386/isa/comreg.h, revision 1.1.1.1

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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