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/*
* Copyright 2007-2008 by Sascha Hlusiak. <saschahlusiak@freedesktop.org>
*
* 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 Sascha Hlusiak not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Sascha Hlusiak makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* SASCHA HLUSIAK DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL SASCHA HLUSIAK 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.
*
*/
/**
* This provides the backend for Linux joystick devices.
* Usable in FreeBSD with the linux_js module.
* Devices are usually /dev/input/js?
**/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <linux/joystick.h>
#include <xf86.h>
#include <xf86_OSproc.h>
#include "jstk.h"
#include "backend_joystick.h"
/***********************************************************************
*
* jstkOpenDevice --
*
* Open and initialize a joystick device. The device name is
* taken from JoystickDevPtr
* Returns the filedescriptor, or -1 in case of error
*
***********************************************************************
*/
int
jstkOpenDevice_joystick(JoystickDevPtr joystick)
{
char joy_name[128];
unsigned char axes, buttons;
int driver_version;
if ((joystick->fd = open(joystick->device, O_RDONLY | O_NDELAY, 0)) < 0) {
xf86Msg(X_ERROR, "Cannot open joystick '%s' (%s)\n",
joystick->device, strerror(errno));
return -1;
}
if (ioctl(joystick->fd, JSIOCGVERSION, &driver_version) == -1) {
xf86Msg(X_ERROR, "Joystick: ioctl JSIOCGVERSION on '%s' failed: %s\n",
joystick->device, strerror(errno));
close(joystick->fd);
joystick->fd = -1;
return -1;
}
if ((driver_version >> 16) < 1) {
xf86Msg(X_WARNING, "Joystick: Driver version is only %d.%d.%d\n",
driver_version >> 16,
(driver_version >> 8) & 0xff,
driver_version & 0xff);
}
if (ioctl(joystick->fd, JSIOCGAXES, &axes) == -1) {
xf86Msg(X_ERROR, "Joystick: ioctl JSIOCGAXES on '%s' failed: %s\n",
joystick->device, strerror(errno));
close(joystick->fd);
joystick->fd = -1;
return -1;
}
if (ioctl(joystick->fd, JSIOCGBUTTONS, &buttons) == -1) {
xf86Msg(X_ERROR, "Joystick: ioctl JSIOCGBUTTONS on '%s' failed: %s\n",
joystick->device, strerror(errno));
close(joystick->fd);
joystick->fd = -1;
return -1;
}
if (ioctl(joystick->fd, JSIOCGNAME(128), joy_name) == -1) {
xf86Msg(X_ERROR, "Joystick: ioctl JSIOCGNAME on '%s' failed: %s\n",
joystick->device, strerror(errno));
close(joystick->fd);
joystick->fd = -1;
return -1;
}
xf86Msg(X_INFO, "Joystick: %s. %d axes, %d buttons\n",
joy_name, axes, buttons);
joystick->read_proc = jstkReadData_joystick;
joystick->close_proc = jstkCloseDevice_joystick;
return joystick->fd;
}
/***********************************************************************
*
* jstkCloseDevice --
*
* close the handle.
*
***********************************************************************
*/
void
jstkCloseDevice_joystick(JoystickDevPtr joystick)
{
if ((joystick->fd >= 0)) {
xf86CloseSerial(joystick->fd);
joystick->fd = -1;
}
}
/***********************************************************************
*
* jstkReadData --
*
* Reads data from fd and stores it in the JoystickDevRec struct
* fills in the type of event and the number of the button/axis
* return 1 if success, 0 otherwise. Success does not neccessarily
* mean that there is a new event waiting.
*
***********************************************************************
*/
int
jstkReadData_joystick(JoystickDevPtr joystick,
JOYSTICKEVENT *event,
int *number)
{
struct js_event js;
if (event != NULL) *event = EVENT_NONE;
if (xf86ReadSerial(joystick->fd, &js, sizeof(struct js_event)) !=
sizeof(struct js_event))
return 0;
switch(js.type & ~JS_EVENT_INIT) {
case JS_EVENT_BUTTON:
if (js.number < MAXBUTTONS)
{
if (joystick->button[js.number].pressed != js.value) {
joystick->button[js.number].pressed = js.value;
if (event != NULL) *event = EVENT_BUTTON;
if (number != NULL) *number = js.number;
}
}
break;
case JS_EVENT_AXIS:
if (js.number < MAXAXES) {
if (abs(js.value) < joystick->axis[js.number].deadzone) {
/* We only want one event when in deadzone */
if (joystick->axis[js.number].value != 0) {
joystick->axis[js.number].oldvalue =
joystick->axis[js.number].value;
joystick->axis[js.number].value = 0;
if (event != NULL) *event = EVENT_AXIS;
if (number != NULL) *number = js.number;
}
}else{
joystick->axis[js.number].oldvalue =
joystick->axis[js.number].value;
joystick->axis[js.number].value = js.value;
if (event != NULL) *event = EVENT_AXIS;
if (number != NULL) *number = js.number;
}
}
break;
}
return 1;
}
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