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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* 3-Byte Mouse Protocol
*/
#include <sys/param.h>
#include <sys/stream.h>
#include <sys/strsun.h>
#include <sys/vuid_event.h>
#include "vuidmice.h"
#define VUID_BUT(b) BUT((b*2)+1)
/*
* VUID_BUT(0) BUT(1) LEFT BUTTON
* VUID_BUT(1) BUT(3) RIGHT BUTTON
*/
#define MOUSE_BUTTON_L (uchar_t)(0x20) /* Left button pressed */
#define MOUSE_BUTTON_R (uchar_t)(0x10) /* Right button pressed */
#define MOUSE_START_CODE (uchar_t)(0x40) /* Start code in char */
#define MOUSE_START 0 /* Beginning of packet */
#define MOUSE_BUTTON 1 /* Got button status */
#define MOUSE_DELTA_X 2 /* got delta X */
extern void VUID_PUTNEXT(queue_t *const, uchar_t, uchar_t, uchar_t, int);
int
VUID_OPEN(queue_t *const qp)
{
STATEP->nbuttons = 2;
return (0);
}
static void
vuidm3p_sendButtonEvent(queue_t *const qp)
{
int b;
if ((STATEP->buttons == 0x30) && (!STATEP->oldbuttons)) {
/*
* both buttons going down simultaneously means button
* two going down
*/
vuidm3p_putnext(qp, (uchar_t)MS_MIDDLE, FE_PAIR_NONE, 0, 1);
return;
} else if ((!STATEP->buttons) && (STATEP->oldbuttons == 0x30)) {
/*
* both buttons going up simultaneously means button
* two going up
*/
vuidm3p_putnext(qp, (uchar_t)MS_MIDDLE, FE_PAIR_NONE, 0, 0);
return;
}
/*
* for each button, see if it has changed
*/
for (b = 0; b < 2; b++) {
uchar_t mask = 0x20 >> b;
if ((STATEP->buttons & mask) != (STATEP->oldbuttons & mask))
VUID_PUTNEXT(qp, VUID_BUT(b), FE_PAIR_NONE, 0,
(STATEP->buttons & mask ? 1 : 0));
}
}
void
vuidm3p(queue_t *const qp, mblk_t *mp)
{
int r, code;
uchar_t *bufp;
bufp = mp->b_rptr;
r = MBLKL(mp);
for (r--; r >= 0; r--) {
code = *bufp++;
/* strip the high-order bit (mouse sends 7-bit data) */
code &= 0x7f;
switch (STATEP->state) {
/*
* Start state. We stay here if the start code is not
* received thus forcing us back into sync. When we
* get a start code the button mask comes with it
* forcing us to the next state.
*/
default:
case MOUSE_START:
start_code:
STATEP->deltax = STATEP->deltay = 0;
/* look for sync */
if ((code & MOUSE_START_CODE) == 0)
break;
STATEP->buttons = code & 0x30;
if (STATEP->buttons != STATEP->oldbuttons) {
vuidm3p_sendButtonEvent(qp);
/*
* remember state
*/
STATEP->oldbuttons = STATEP->buttons;
}
/*
* bits 0 & 1 are bits 6 & 7 of X value
* (Sign extend them with the cast.)
*/
STATEP->deltax = (signed char)((code & 0x03) << 6);
/*
* bits 2 & 3 are bits 6 & 7 of Y value
* (Sign extend them with the cast.)
*/
STATEP->deltay = (signed char)((code & 0x0c) << 4);
/*
* go to the next state
*/
STATEP->state = MOUSE_BUTTON;
break;
/*
* We receive the remaining 6 bits of delta x, forcing
* us to the next state. We just piece the value of
* delta x together.
*/
case MOUSE_BUTTON:
if (code & MOUSE_START_CODE) {
STATEP->state = MOUSE_START;
goto start_code; /* restart */
}
STATEP->deltax |= code & 0x3f;
STATEP->state = MOUSE_DELTA_X;
break;
/*
* The last part of delta Y, and the packet
* *may be* complete
*/
case MOUSE_DELTA_X:
if (code & MOUSE_START_CODE) {
STATEP->state = MOUSE_START;
goto start_code; /* restart */
}
STATEP->deltay |= code & 0x3f;
/*
* generate motion Event
*/
if (STATEP->deltax)
VUID_PUTNEXT(qp, (uchar_t)LOC_X_DELTA,
FE_PAIR_ABSOLUTE, (uchar_t)LOC_X_ABSOLUTE,
STATEP->deltax);
if (STATEP->deltay)
VUID_PUTNEXT(qp, (uchar_t)LOC_Y_DELTA,
FE_PAIR_ABSOLUTE, (uchar_t)LOC_Y_ABSOLUTE,
-STATEP->deltay);
STATEP->deltax = STATEP->deltay = 0;
break;
}
}
freemsg(mp);
}
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