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/sys/serial.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2004 Poul-Henning Kamp
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  *
   28  * This file contains definitions which pertain to serial ports as such,
   29  * (both async and sync), but which do not necessarily have anything to
   30  * do with tty processing.
   31  *
   32  * $FreeBSD: head/sys/sys/serial.h 326256 2017-11-27 15:01:59Z pfg $
   33  */
   34 
   35 #ifndef _SYS_SERIAL_H_
   36 #define _SYS_SERIAL_H_
   37 
   38 
   39 /*
   40  * Indentification of modem control signals.  These definitions match
   41  * the TIOCMGET definitions in <sys/ttycom.h> shifted a bit down, and
   42  * that identity is enforced with CTASSERT at the bottom of kern/tty.c
   43  * Both the modem bits and delta bits must fit in 16 bit.
   44  */
   45 #define SER_DTR         0x0001          /* data terminal ready */
   46 #define SER_RTS         0x0002          /* request to send */
   47 #define SER_STX         0x0004          /* secondary transmit */
   48 #define SER_SRX         0x0008          /* secondary receive */
   49 #define SER_CTS         0x0010          /* clear to send */
   50 #define SER_DCD         0x0020          /* data carrier detect */
   51 #define SER_RI          0x0040          /* ring indicate */
   52 #define SER_DSR         0x0080          /* data set ready */
   53 
   54 #define SER_MASK_STATE  0x00ff
   55 
   56 /* Delta bits, used to indicate which signals should/was affected */
   57 #define SER_DELTA(x)    ((x) << 8)
   58 
   59 #define SER_DDTR        SER_DELTA(SER_DTR)
   60 #define SER_DRTS        SER_DELTA(SER_RTS)
   61 #define SER_DSTX        SER_DELTA(SER_STX)
   62 #define SER_DSRX        SER_DELTA(SER_SRX)
   63 #define SER_DCTS        SER_DELTA(SER_CTS)
   64 #define SER_DDCD        SER_DELTA(SER_DCD)
   65 #define SER_DRI         SER_DELTA(SER_RI)
   66 #define SER_DDSR        SER_DELTA(SER_DSR)
   67 
   68 #define SER_MASK_DELTA  SER_DELTA(SER_MASK_STATE)
   69 
   70 #ifdef _KERNEL
   71 /*
   72  * Specification of interrupt sources typical for serial ports. These are
   73  * useful when some umbrella driver like scc(4) has enough knowledge of
   74  * the hardware to obtain the set of pending interrupts but does not itself
   75  * handle the interrupt. Each interrupt source can be given an interrupt
   76  * resource for which inferior drivers can install handlers. The lower 16
   77  * bits are kept free for the signals above.
   78  */
   79 #define SER_INT_OVERRUN 0x010000
   80 #define SER_INT_BREAK   0x020000
   81 #define SER_INT_RXREADY 0x040000
   82 #define SER_INT_SIGCHG  0x080000
   83 #define SER_INT_TXIDLE  0x100000
   84 
   85 #define SER_INT_MASK    0xff0000
   86 #define SER_INT_SIGMASK (SER_MASK_DELTA | SER_MASK_STATE)
   87 
   88 #ifndef LOCORE
   89 typedef int serdev_intr_t(void*);
   90 #endif
   91 
   92 #endif  /* _KERNEL */
   93 
   94 #endif /* !_SYS_SERIAL_H_ */

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