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msvar.h revision 1.3 
      1 /*	$NetBSD: msvar.h,v 1.3 2001/12/09 12:02:06 pk Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * All advertising materials mentioning features or use of this software
     12  * must display the following acknowledgement:
     13  *	This product includes software developed by the University of
     14  *	California, Lawrence Berkeley Laboratory.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  * 3. All advertising materials mentioning features or use of this software
     25  *    must display the following acknowledgement:
     26  *	This product includes software developed by the University of
     27  *	California, Berkeley and its contributors.
     28  * 4. Neither the name of the University nor the names of its contributors
     29  *    may be used to endorse or promote products derived from this software
     30  *    without specific prior written permission.
     31  *
     32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     35  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     42  * SUCH DAMAGE.
     43  *
     44  *	@(#)ms.c	8.1 (Berkeley) 6/11/93
     45  */
     46 
     47 /*
     48  * How many input characters we can buffer.
     49  * The port-specific var.h may override this.
     50  * Note: must be a power of two!
     51  */
     52 #define	MS_RX_RING_SIZE	256
     53 #define MS_RX_RING_MASK (MS_RX_RING_SIZE-1)
     54 /*
     55  * Output buffer.  Only need a few chars.
     56  */
     57 #define	MS_TX_RING_SIZE	16
     58 #define MS_TX_RING_MASK (MS_TX_RING_SIZE-1)
     59 /*
     60  * mouse serial line speed defaults to 1200 bps.
     61  */
     62 #define MS_DEFAULT_BPS 	1200
     63 
     64 /*
     65  * Mouse state.  A Mouse Systems mouse is a fairly simple device,
     66  * producing five-byte blobs of the form:
     67  *
     68  *	b dx dy dx dy
     69  *
     70  * where b is the button state, encoded as 0x80|(~buttons)---there are
     71  * three buttons (4=left, 2=middle, 1=right)---and dx,dy are X and Y
     72  * delta values, none of which have are in [0x80..0x87].  (This lets
     73  * us sync up with the mouse after an error.)
     74  */
     75 struct ms_softc {
     76 	struct	device ms_dev;		/* required first: base device */
     77 	struct	zs_chanstate *ms_cs;
     78 
     79 	/*
     80 	 * The deviopen and deviclose routines are provided
     81 	 * by the lower level driver and used as a back door
     82 	 * when opening and closing the internal device.
     83 	 */
     84 	int	(*ms_deviopen)	__P((struct device *, int));
     85 	int	(*ms_deviclose)	__P((struct device *, int));
     86 
     87 	/* Flags to communicate with ms_softintr() */
     88 	volatile int ms_intr_flags;
     89 #define	INTR_RX_OVERRUN 1
     90 #define INTR_TX_EMPTY   2
     91 #define INTR_ST_CHECK   4
     92 
     93 	/*
     94 	 * The receive ring buffer.
     95 	 */
     96 	u_int	ms_rbget;	/* ring buffer `get' index */
     97 	volatile u_int	ms_rbput;	/* ring buffer `put' index */
     98 	u_short	ms_rbuf[MS_RX_RING_SIZE]; /* rr1, data pairs */
     99 
    100 	/*
    101 	 * State of input translator
    102 	 */
    103 	short	ms_byteno;		/* input byte number, for decode */
    104 	char	ms_mb;			/* mouse button state */
    105 	char	ms_ub;			/* user button state */
    106 	int	ms_dx;			/* delta-x */
    107 	int	ms_dy;			/* delta-y */
    108 
    109 	/*
    110 	 * State of upper interface.
    111 	 */
    112 	volatile int ms_ready;		/* event queue is ready */
    113 	struct	evvar ms_events;	/* event queue state */
    114 };
    115 
    116 /* front-end call back for mouse input */
    117 void ms_input __P((struct ms_softc *, int c));
    118