/* Portions of this file were derived from the following files:
*
**********************************************************************
*
* Xserver/hw/kdrive/linux/ps2.c
*
* Copyright (c) 1999 by Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*
*/
/*
* Copyright 2001,2003 Red Hat Inc., Durham, North Carolina.
*
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation on the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* Authors:
* Rickard E. (Rik) Faith <[email protected]>
*
*/
/** \file
*
* This code implements a low-level device driver for a serial MS mouse.
* The code is derived from code by Keith Packard (see the source code
* for complete references). */
#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif
#include "inputstr.h"
#include <X11/Xos.h>
#include <errno.h>
#include <termios.h>
/*****************************************************************************/
/* Define some macros to make it easier to move this file to another
* part of the Xserver tree. All calls to the dmx* layer are #defined
* here for the .c file. The .h file will also have to be edited. */
#include "dmxinputinit.h"
#include "lnx-ps2.h"
#define GETPRIV myPrivate *priv \
= ((DMXLocalInputInfoPtr)(pDev->devicePrivate))->private
#define LOG0(f) dmxLog(dmxDebug,f)
#define LOG1(f,a) dmxLog(dmxDebug,f,a)
#define LOG2(f,a,b) dmxLog(dmxDebug,f,a,b)
#define LOG3(f,a,b,c) dmxLog(dmxDebug,f,a,b,c)
#define FATAL0(f) dmxLog(dmxFatal,f)
#define FATAL1(f,a) dmxLog(dmxFatal,f,a)
#define FATAL2(f,a,b) dmxLog(dmxFatal,f,a,b)
#define MOTIONPROC dmxMotionProcPtr
#define ENQUEUEPROC dmxEnqueueProcPtr
#define CHECKPROC dmxCheckSpecialProcPtr
#define BLOCK DMXBlockType
/* End of interface definitions. */
/*****************************************************************************/
/* Private area for PS/2 devices. */
typedef struct _myPrivate {
DeviceIntPtr pMouse;
int fd;
enum {
button1 = 0x0001,
button2 = 0x0002,
button3 = 0x0004,
button4 = 0x0008,
button5 = 0x0010
} buttons;
} myPrivate;
static int ps2LinuxReadBytes(int fd, unsigned char *buf, int len, int min)
{
int n, tot;
fd_set set;
struct timeval tv;
tot = 0;
while (len) {
n = read(fd, buf, len);
if (n > 0) {
tot += n;
buf += n;
len -= n;
}
if (tot % min == 0) break;
FD_ZERO(&set);
FD_SET(fd, &set);
tv.tv_sec = 0;
tv.tv_usec = 100 * 1000;
n = select(fd + 1, &set, 0, 0, &tv);
if (n <= 0) break;
}
return tot;
}
static void ps2LinuxButton(DevicePtr pDev, ENQUEUEPROC enqueue,
int buttons, BLOCK block)
{
GETPRIV;
#define PRESS(b) \
do { \
enqueue(pDev, ButtonPress, 0, 0, NULL, block); \
} while (0)
#define RELEASE(b) \
do { \
enqueue(pDev, ButtonRelease, 0, 0, NULL, block); \
} while (0)
if ((buttons & button1) && !(priv->buttons & button1)) PRESS(1);
if (!(buttons & button1) && (priv->buttons & button1)) RELEASE(1);
if ((buttons & button2) && !(priv->buttons & button2)) PRESS(2);
if (!(buttons & button2) && (priv->buttons & button2)) RELEASE(2);
if ((buttons & button3) && !(priv->buttons & button3)) PRESS(3);
if (!(buttons & button3) && (priv->buttons & button3)) RELEASE(3);
if ((buttons & button4) && !(priv->buttons & button4)) PRESS(4);
if (!(buttons & button4) && (priv->buttons & button4)) RELEASE(4);
if ((buttons & button5) && !(priv->buttons & button5)) PRESS(5);
if (!(buttons & button5) && (priv->buttons & button5)) RELEASE(5);
priv->buttons = buttons;
}
/** Read an event from the \a pDev device. If the event is a motion
* event, enqueue it with the \a motion function. Otherwise, check for
* special keys with the \a checkspecial function and enqueue the event
* with the \a enqueue function. The \a block type is passed to the
* functions so that they may block SIGIO handling as appropriate to the
* caller of this function. */
void ps2LinuxRead(DevicePtr pDev, MOTIONPROC motion,
ENQUEUEPROC enqueue, CHECKPROC checkspecial, BLOCK block)
{
GETPRIV;
unsigned char buf[3 * 200]; /* RATS: Use ok */
unsigned char *b;
int n;
int dx, dy, v[2];
while ((n = ps2LinuxReadBytes(priv->fd, buf, sizeof(buf), 3)) > 0) {
b = buf;
while (n >= 3) {
dx = b[1] - ((b[0] & 0x10) ? 256 : 0);
dy = -b[2] + ((b[0] & 0x20) ? 256 : 0);
v[0] = -dx;
v[1] = -dy;
motion(pDev, v, 0, 2, 1, block);
ps2LinuxButton(pDev, enqueue, (((b[0] & 4) ? button2 : 0)
| ((b[0] & 2) ? button3 : 0)
| ((b[0] & 1) ? button1 : 0)),
block);
n -= 3;
b += 3;
}
}
}
/** Initialize \a pDev. */
void ps2LinuxInit(DevicePtr pDev)
{
GETPRIV;
const char *names[] = { "/dev/mouse", "/dev/psaux", NULL };
int i;
if (priv->fd >=0) return;
for (i = 0; names[i]; i++) {
if ((priv->fd = open(names[i], O_RDWR | O_NONBLOCK, 0)) >= 0) break;
}
if (priv->fd < 0)
FATAL1("ps2LinuxInit: Cannot open mouse port (%s)\n",
strerror(errno));
}
/** Turn \a pDev on (i.e., take input from \a pDev). */
int ps2LinuxOn(DevicePtr pDev)
{
GETPRIV;
if (priv->fd < 0) ps2LinuxInit(pDev);
return priv->fd;
}
/** Turn \a pDev off (i.e., stop taking input from \a pDev). */
void ps2LinuxOff(DevicePtr pDev)
{
GETPRIV;
close(priv->fd);
priv->fd = -1;
}
static void ps2LinuxGetMap(DevicePtr pDev, unsigned char *map, int *nButtons)
{
int i;
if (nButtons) *nButtons = 3;
if (map) for (i = 0; i <= *nButtons; i++) map[i] = i;
}
/** Currently unused hook called prior to an VT switch. */
void ps2LinuxVTPreSwitch(pointer p)
{
}
/** Currently unused hook called after returning from a VT switch. */
void ps2LinuxVTPostSwitch(pointer p)
{
}
/** Create a private structure for use within this file. */
pointer ps2LinuxCreatePrivate(DeviceIntPtr pMouse)
{
myPrivate *priv = xalloc(sizeof(*priv));
memset(priv, 0, sizeof(*priv));
priv->fd = -1;
priv->pMouse = pMouse;
return priv;
}
/** Destroy a private structure. */
void ps2LinuxDestroyPrivate(pointer priv)
{
if (priv) xfree(priv);
}
/** Fill the \a info structure with information needed to initialize \a
* pDev. */
void ps2LinuxGetInfo(DevicePtr pDev, DMXLocalInitInfoPtr info)
{
info->buttonClass = 1;
ps2LinuxGetMap(pDev, info->map, &info->numButtons);
info->valuatorClass = 1;
info->numRelAxes = 2;
info->minval[0] = 0;
info->maxval[0] = 0;
info->res[0] = 1;
info->minres[0] = 0;
info->maxres[0] = 1;
info->ptrFeedbackClass = 1;
}
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