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msvar.h revision 1.2 
      1 /*	$NetBSD: msvar.h,v 1.2 2000/09/21 23:40:47 eeh 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  * Keyboard serial line speed is fixed at 1200 bps; mouse serial line
     61  * speed defaults to 1200 bps.
     62  */
     63 #ifdef	SUN_MS_BPS
     64 #define	MS_BPS	SUN_MS_BPS
     65 #else
     66 #define MS_BPS 	1200
     67 #endif
     68 
     69 /*
     70  * Mouse state.  A Mouse Systems mouse is a fairly simple device,
     71  * producing five-byte blobs of the form:
     72  *
     73  *	b dx dy dx dy
     74  *
     75  * where b is the button state, encoded as 0x80|(~buttons)---there are
     76  * three buttons (4=left, 2=middle, 1=right)---and dx,dy are X and Y
     77  * delta values, none of which have are in [0x80..0x87].  (This lets
     78  * us sync up with the mouse after an error.)
     79  */
     80 struct ms_softc {
     81 	struct	device ms_dev;		/* required first: base device */
     82 	struct	zs_chanstate *ms_cs;
     83 
     84 	/*
     85 	 * The deviopen and deviclose routines are provided
     86 	 * by the lower level driver and used as a back door
     87 	 * when opening and closing the internal device.
     88 	 */
     89 	int	(*ms_deviopen)	__P((struct device *, int));
     90 	int	(*ms_deviclose)	__P((struct device *, int));
     91 
     92 	/* Flags to communicate with ms_softintr() */
     93 	volatile int ms_intr_flags;
     94 #define	INTR_RX_OVERRUN 1
     95 #define INTR_TX_EMPTY   2
     96 #define INTR_ST_CHECK   4
     97 
     98 	/*
     99 	 * The receive ring buffer.
    100 	 */
    101 	u_int	ms_rbget;	/* ring buffer `get' index */
    102 	volatile u_int	ms_rbput;	/* ring buffer `put' index */
    103 	u_short	ms_rbuf[MS_RX_RING_SIZE]; /* rr1, data pairs */
    104 
    105 	/*
    106 	 * State of input translator
    107 	 */
    108 	short	ms_byteno;		/* input byte number, for decode */
    109 	char	ms_mb;			/* mouse button state */
    110 	char	ms_ub;			/* user button state */
    111 	int	ms_dx;			/* delta-x */
    112 	int	ms_dy;			/* delta-y */
    113 
    114 	/*
    115 	 * State of upper interface.
    116 	 */
    117 	volatile int ms_ready;		/* event queue is ready */
    118 	struct	evvar ms_events;	/* event queue state */
    119 };
    120 
    121 /* front-end call back for mouse input */
    122 void ms_input __P((struct ms_softc *, int c));
    123