FreeBSD/Linux Kernel Cross Reference
sys/sys/serial.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2004 Poul-Henning Kamp
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * This file contains definitions which pertain to serial ports as such,
     * (both async and sync), but which do not necessarily have anything to
     * do with tty processing.
     *
     * $FreeBSD$
     */
    
    #ifndef _SYS_SERIAL_H_
    #define _SYS_SERIAL_H_
    
    /*
     * Indentification of modem control signals.  These definitions match
     * the TIOCMGET definitions in <sys/ttycom.h> shifted a bit down, and
     * that identity is enforced with CTASSERT at the bottom of kern/tty.c
     * Both the modem bits and delta bits must fit in 16 bit.
     */
    #define SER_DTR         0x0001          /* data terminal ready */
    #define SER_RTS         0x0002          /* request to send */
    #define SER_STX         0x0004          /* secondary transmit */
    #define SER_SRX         0x0008          /* secondary receive */
    #define SER_CTS         0x0010          /* clear to send */
    #define SER_DCD         0x0020          /* data carrier detect */
    #define SER_RI          0x0040          /* ring indicate */
    #define SER_DSR         0x0080          /* data set ready */
    
    #define SER_MASK_STATE  0x00ff
    
    /* Delta bits, used to indicate which signals should/was affected */
    #define SER_DELTA(x)    ((x) << 8)
    
    #define SER_DDTR        SER_DELTA(SER_DTR)
    #define SER_DRTS        SER_DELTA(SER_RTS)
    #define SER_DSTX        SER_DELTA(SER_STX)
    #define SER_DSRX        SER_DELTA(SER_SRX)
    #define SER_DCTS        SER_DELTA(SER_CTS)
    #define SER_DDCD        SER_DELTA(SER_DCD)
    #define SER_DRI         SER_DELTA(SER_RI)
    #define SER_DDSR        SER_DELTA(SER_DSR)
    
    #define SER_MASK_DELTA  SER_DELTA(SER_MASK_STATE)
    
    #ifdef _KERNEL
    /*
     * Specification of interrupt sources typical for serial ports. These are
     * useful when some umbrella driver like scc(4) has enough knowledge of
     * the hardware to obtain the set of pending interrupts but does not itself
     * handle the interrupt. Each interrupt source can be given an interrupt
     * resource for which inferior drivers can install handlers. The lower 16
     * bits are kept free for the signals above.
     */
    #define SER_INT_OVERRUN 0x010000
    #define SER_INT_BREAK   0x020000
    #define SER_INT_RXREADY 0x040000
    #define SER_INT_SIGCHG  0x080000
    #define SER_INT_TXIDLE  0x100000
    
    #define SER_INT_MASK    0xff0000
    #define SER_INT_SIGMASK (SER_MASK_DELTA | SER_MASK_STATE)
    
    #ifndef LOCORE
    typedef int serdev_intr_t(void*);
    #endif
    
    #endif  /* _KERNEL */
    
    #endif /* !_SYS_SERIAL_H_ */

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