/*
* 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 {
device_t ms_dev; /* required first: base device */
union {
void *msu_priv;
struct zs_chanstate *msu_cs;
} ms_u;
#define ms_priv ms_u.msu_priv
#define ms_cs ms_u.msu_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) (device_t, int);
int (*ms_deviclose) (device_t, 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 */
device_t ms_wsmousedev;
};
/* front-end call back for mouse input */
void ms_input(struct ms_softc *, int c);
