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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.
*/
/*
* 5-Byte Mouse Protocol
*/
#include <sys/param.h>
#include <sys/stream.h>
#include <sys/strsun.h>
#include <sys/vuid_event.h>
#include "vuidmice.h"
#define LOGI_NUMBUTTONS 3 /* Number of buttons */
#define LOGI_BMASK (uchar_t)7 /* Button mask in packet */
#define LOGI_NOT_BMASK (uchar_t)(~LOGI_BMASK) /* Rest of the bits */
#define LOGI_START_CODE (uchar_t)(0x80) /* Start code in char */
#define LOGI_START 0 /* Beginning of packet */
#define LOGI_BUTTON 1 /* Got button status */
#define LOGI_DELTA_X1 2 /* First of 2 delta X */
#define LOGI_DELTA_Y1 3 /* First of 2 delta Y */
#define LOGI_DELTA_X2 4 /* Second of 2 delta X */
extern void VUID_PUTNEXT(queue_t *const, uchar_t, uchar_t, uchar_t, int);
int
VUID_OPEN(queue_t *const qp)
{
/*
* The current kdmconfig tables imply that this module can be used
* for both 2- and 3- button mice, so based on that evidence we
* can't assume a constant. I don't know whether it's possible
* to autodetect.
*/
STATEP->nbuttons = 0; /* Don't know. */
return (0);
}
static void
vuidm5p_sendButtonEvent(queue_t *const qp)
{
int b;
/* for each button, see if it has changed */
for (b = 0; b < 3; b++) {
uchar_t mask = 4 >> b;
if ((STATEP->buttons&mask) != (STATEP->oldbuttons&mask))
VUID_PUTNEXT(qp, BUT(b+1), FE_PAIR_NONE, 0,
(STATEP->buttons & mask ? 1 : 0));
}
}
void
vuidm5p(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++;
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:
resync:
case LOGI_START:
if ((code & LOGI_NOT_BMASK) != LOGI_START_CODE)
break;
STATEP->state = LOGI_BUTTON;
STATEP->deltax = STATEP->deltay = 0;
STATEP->buttons = (~code) & LOGI_BMASK;
/* or xlate[code & ] */
break;
case LOGI_BUTTON:
/*
* We receive the first of 2 delta x which forces us
* to the next state. We just add the values of each
* delta x together.
*/
if ((code & LOGI_NOT_BMASK) == LOGI_START_CODE) {
STATEP->state = LOGI_START;
goto resync;
}
/* (The cast sign extends the 8-bit value.) */
STATEP->deltax += (signed char)code;
STATEP->state = LOGI_DELTA_X1;
break;
case LOGI_DELTA_X1:
/*
* The first of 2 delta y. We just add
* the 2 delta y together
*/
if ((code & LOGI_NOT_BMASK) == LOGI_START_CODE) {
STATEP->state = LOGI_START;
goto resync;
}
/* (The cast sign extends the 8-bit value.) */
STATEP->deltay += (signed char)code;
STATEP->state = LOGI_DELTA_Y1;
break;
case LOGI_DELTA_Y1:
/*
* The second of 2 delta x. We just add
* the 2 delta x together.
*/
if ((code & LOGI_NOT_BMASK) == LOGI_START_CODE) {
STATEP->state = LOGI_START;
goto resync;
}
/* (The cast sign extends the 8-bit value.) */
STATEP->deltax += (signed char)code;
STATEP->state = LOGI_DELTA_X2;
break;
case LOGI_DELTA_X2:
/*
* The second of 2 delta y. We just add
* the 2 delta y together.
*/
if ((code & LOGI_NOT_BMASK) == LOGI_START_CODE) {
STATEP->state = LOGI_START;
goto resync;
}
/* (The cast sign extends the 8-bit value.) */
STATEP->deltay += (signed char)code;
STATEP->state = LOGI_START;
/* check if motion has occurred and send event(s)... */
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;
/* see if the buttons have changed */
if (STATEP->buttons != STATEP->oldbuttons) {
/* buttons have changed */
vuidm5p_sendButtonEvent(qp);
/* update new button state */
STATEP->oldbuttons = STATEP->buttons;
}
}
}
freemsg(mp);
}
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