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msvar.h revision 1.5.8.1 
      1 /*	$NetBSD: msvar.h,v 1.5.8.1 2005/04/29 11:29:17 kent 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. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  *	@(#)ms.c	8.1 (Berkeley) 6/11/93
     41  */
     42 
     43 /*
     44  * How many input characters we can buffer.
     45  * The port-specific var.h may override this.
     46  * Note: must be a power of two!
     47  */
     48 #define	MS_RX_RING_SIZE	256
     49 #define MS_RX_RING_MASK (MS_RX_RING_SIZE-1)
     50 /*
     51  * Output buffer.  Only need a few chars.
     52  */
     53 #define	MS_TX_RING_SIZE	16
     54 #define MS_TX_RING_MASK (MS_TX_RING_SIZE-1)
     55 /*
     56  * mouse serial line speed defaults to 1200 bps.
     57  */
     58 #define MS_DEFAULT_BPS 	1200
     59 
     60 /*
     61  * Mouse state.  A Mouse Systems mouse is a fairly simple device,
     62  * producing five-byte blobs of the form:
     63  *
     64  *	b dx dy dx dy
     65  *
     66  * where b is the button state, encoded as 0x80|(~buttons)---there are
     67  * three buttons (4=left, 2=middle, 1=right)---and dx,dy are X and Y
     68  * delta values, none of which have are in [0x80..0x87].  (This lets
     69  * us sync up with the mouse after an error.)
     70  */
     71 struct ms_softc {
     72 	struct	device ms_dev;		/* required first: base device */
     73 	struct	zs_chanstate *ms_cs;
     74 
     75 	/*
     76 	 * The deviopen and deviclose routines are provided
     77 	 * by the lower level driver and used as a back door
     78 	 * when opening and closing the internal device.
     79 	 */
     80 	int	(*ms_deviopen)	(struct device *, int);
     81 	int	(*ms_deviclose)	(struct device *, int);
     82 
     83 	/* Flags to communicate with ms_softintr() */
     84 	volatile int ms_intr_flags;
     85 #define	INTR_RX_OVERRUN 1
     86 #define INTR_TX_EMPTY   2
     87 #define INTR_ST_CHECK   4
     88 
     89 	/*
     90 	 * The receive ring buffer.
     91 	 */
     92 	u_int	ms_rbget;	/* ring buffer `get' index */
     93 	volatile u_int	ms_rbput;	/* ring buffer `put' index */
     94 	u_short	ms_rbuf[MS_RX_RING_SIZE]; /* rr1, data pairs */
     95 
     96 	/*
     97 	 * State of input translator
     98 	 */
     99 	short	ms_byteno;		/* input byte number, for decode */
    100 	char	ms_mb;			/* mouse button state */
    101 	char	ms_ub;			/* user button state */
    102 	int	ms_dx;			/* delta-x */
    103 	int	ms_dy;			/* delta-y */
    104 
    105 	/*
    106 	 * State of upper interface.
    107 	 */
    108 	volatile int ms_ready;		/* event queue is ready */
    109 	struct	evvar ms_events;	/* event queue state */
    110 
    111 	struct device *ms_wsmousedev;
    112 };
    113 
    114 /* front-end call back for mouse input */
    115 void ms_input(struct ms_softc *, int c);
    116