this version can at least talk to the CSR's of the sgs thompson chip

[unix-history] / usr / src / sys / i386 / isa / comreg.h

/*-
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*
*      @(#)comreg.h    7.2 (Berkeley) %G%
*/


/* 16 bit baud rate divisor (lower byte in dca_data, upper in dca_ier) */
#define COMBRD(x)       (1843200 / (16*(x)))

/* interrupt enable register */
#define IER_ERXRDY      0x1
#define IER_ETXRDY      0x2
#define IER_ERLS        0x4
#define IER_EMSC        0x8

/* interrupt identification register */
#define IIR_IMASK       0xf
#define IIR_RXTOUT      0xc
#define IIR_RLS         0x6
#define IIR_RXRDY       0x4
#define IIR_TXRDY       0x2
#define IIR_NOPEND      0x1
#define IIR_MLSC        0x0
#define IIR_FIFO_MASK   0xc0    /* set if FIFOs are enabled */

/* fifo control register */
#define FIFO_ENABLE     0x01
#define FIFO_RCV_RST    0x02
#define FIFO_XMT_RST    0x04
#define FIFO_DMA_MODE   0x08
#define FIFO_TRIGGER_1  0x00
#define FIFO_TRIGGER_4  0x40
#define FIFO_TRIGGER_8  0x80
#define FIFO_TRIGGER_14 0xc0

/* character format control register */
#define CFCR_DLAB       0x80
#define CFCR_SBREAK     0x40
#define CFCR_PZERO      0x30
#define CFCR_PONE       0x20
#define CFCR_PEVEN      0x10
#define CFCR_PODD       0x00
#define CFCR_PENAB      0x08
#define CFCR_STOPB      0x04
#define CFCR_8BITS      0x03
#define CFCR_7BITS      0x02
#define CFCR_6BITS      0x01
#define CFCR_5BITS      0x00

/* modem control register */
#define MCR_LOOPBACK    0x10
#define MCR_IENABLE     0x08
#define MCR_DRS         0x04
#define MCR_RTS         0x02
#define MCR_DTR         0x01

/* line status register */
#define LSR_RCV_FIFO    0x80
#define LSR_TSRE        0x40
#define LSR_TXRDY       0x20
#define LSR_BI          0x10
#define LSR_FE          0x08
#define LSR_PE          0x04
#define LSR_OE          0x02
#define LSR_RXRDY       0x01
#define LSR_RCV_MASK    0x1f

/* modem status register */
#define MSR_DCD         0x80
#define MSR_RI          0x40
#define MSR_DSR         0x20
#define MSR_CTS         0x10
#define MSR_DDCD        0x08
#define MSR_TERI        0x04
#define MSR_DDSR        0x02
#define MSR_DCTS        0x01

/*
* WARNING: Serial console is assumed to be at COM1 address
* and CONUNIT must be 0.
*/
#define CONADDR (0x3f8)
#define CONUNIT (0)