FreeBSD/Linux Kernel Cross Reference
sys/dev/sun/msvar.h

     /*      $NetBSD: msvar.h,v 1.5 2003/08/07 16:31:26 agc Exp $    */
     
     /*
      * Copyright (c) 1992, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * This software was developed by the Computer Systems Engineering group
      * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      * contributed to Berkeley.
     *
     * All advertising materials mentioning features or use of this software
     * must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Lawrence Berkeley Laboratory.
     *
     * 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.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
     *
     *      @(#)ms.c        8.1 (Berkeley) 6/11/93
     */
    
    /*
     * How many input characters we can buffer.
     * The port-specific var.h may override this.
     * Note: must be a power of two!
     */
    #define MS_RX_RING_SIZE 256
    #define MS_RX_RING_MASK (MS_RX_RING_SIZE-1)
    /*
     * Output buffer.  Only need a few chars.
     */
    #define MS_TX_RING_SIZE 16
    #define MS_TX_RING_MASK (MS_TX_RING_SIZE-1)
    /*
     * mouse serial line speed defaults to 1200 bps.
     */
    #define MS_DEFAULT_BPS  1200
    
    /*
     * Mouse state.  A Mouse Systems mouse is a fairly simple device,
     * producing five-byte blobs of the form:
     *
     *      b dx dy dx dy
     *
     * where b is the button state, encoded as 0x80|(~buttons)---there are
     * three buttons (4=left, 2=middle, 1=right)---and dx,dy are X and Y
     * delta values, none of which have are in [0x80..0x87].  (This lets
     * us sync up with the mouse after an error.)
     */
    struct ms_softc {
            struct  device ms_dev;          /* required first: base device */
            struct  zs_chanstate *ms_cs;
    
            /*
             * The deviopen and deviclose routines are provided
             * by the lower level driver and used as a back door
             * when opening and closing the internal device.
             */
            int     (*ms_deviopen)  __P((struct device *, int));
            int     (*ms_deviclose) __P((struct device *, int));
    
            /* Flags to communicate with ms_softintr() */
            volatile int ms_intr_flags;
    #define INTR_RX_OVERRUN 1
    #define INTR_TX_EMPTY   2
    #define INTR_ST_CHECK   4
    
            /*
             * The receive ring buffer.
             */
            u_int   ms_rbget;       /* ring buffer `get' index */
            volatile u_int  ms_rbput;       /* ring buffer `put' index */
            u_short ms_rbuf[MS_RX_RING_SIZE]; /* rr1, data pairs */
    
            /*
             * State of input translator
             */
            short   ms_byteno;              /* input byte number, for decode */
           char    ms_mb;                  /* mouse button state */
           char    ms_ub;                  /* user button state */
           int     ms_dx;                  /* delta-x */
           int     ms_dy;                  /* delta-y */
   
           /*
            * State of upper interface.
            */
           volatile int ms_ready;          /* event queue is ready */
           struct  evvar ms_events;        /* event queue state */
   
           struct device *ms_wsmousedev;
   };
   
   /* front-end call back for mouse input */
   void ms_input __P((struct ms_softc *, int c));

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