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wine-wine/dlls/winejoystick.drv/joystick_linux.c

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/*
* joystick functions
*
* Copyright 1997 Andreas Mohr
* Copyright 2000 Wolfgang Schwotzer
* Copyright 2002 David Hagood
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* NOTES:
*
* - nearly all joystick functions can be regarded as obsolete,
* as Linux (2.1.x) now supports extended joysticks with a completely
* new joystick driver interface
* New driver's documentation says:
* "For backward compatibility the old interface is still included,
* but will be dropped in the future."
* Thus we should implement the new interface and at most keep the old
* routines for backward compatibility.
* - better support of enhanced joysticks (Linux 2.2 interface is available)
* - support more joystick drivers (like the XInput extension)
* - should load joystick DLL as any other driver (instead of hardcoding)
* the driver's name, and load it as any low lever driver.
*/
#include "config.h"
#include "wine/port.h"
#ifdef HAVE_LINUX_22_JOYSTICK_API
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_LINUX_IOCTL_H
#include <linux/ioctl.h>
#endif
#include <linux/joystick.h>
#ifdef SW_MAX
#undef SW_MAX
#endif
#define JOYDEV_NEW "/dev/input/js%d"
#define JOYDEV_OLD "/dev/js%d"
#include <errno.h>
#include "joystick.h"
#include "wingdi.h"
#include "winnls.h"
#include "wine/debug.h"
#include "wine/unicode.h"
WINE_DEFAULT_DEBUG_CHANNEL(joystick);
#define MAXJOYSTICK (JOYSTICKID2 + 30)
typedef struct tagWINE_JSTCK {
int joyIntf;
BOOL in_use;
/* Some extra info we need to make this actually work under the
Linux 2.2 event api.
First of all, we cannot keep closing and reopening the device file -
that blows away the state of the stick device, and we lose events. So, we
need to open the low-level device once, and close it when we are done.
Secondly, the event API only gives us what's changed. However, Windows apps
want the whole state every time, so we have to cache the data.
*/
int dev; /* Linux level device file descriptor */
int x;
int y;
int z;
int r;
int u;
int v;
int pov_x;
int pov_y;
int buttons;
char axesMap[ABS_MAX + 1];
} WINE_JSTCK;
static WINE_JSTCK JSTCK_Data[MAXJOYSTICK];
/**************************************************************************
* JSTCK_drvGet [internal]
*/
static WINE_JSTCK *JSTCK_drvGet(DWORD_PTR dwDevID)
{
int p;
if ((dwDevID - (DWORD_PTR)JSTCK_Data) % sizeof(JSTCK_Data[0]) != 0)
return NULL;
p = (dwDevID - (DWORD_PTR)JSTCK_Data) / sizeof(JSTCK_Data[0]);
if (p < 0 || p >= MAXJOYSTICK || !((WINE_JSTCK*)dwDevID)->in_use)
return NULL;
return (WINE_JSTCK*)dwDevID;
}
/**************************************************************************
* driver_open
*/
LRESULT driver_open(LPSTR str, DWORD dwIntf)
{
if (dwIntf >= MAXJOYSTICK || JSTCK_Data[dwIntf].in_use)
return 0;
JSTCK_Data[dwIntf].joyIntf = dwIntf;
JSTCK_Data[dwIntf].dev = -1;
JSTCK_Data[dwIntf].in_use = TRUE;
return (LRESULT)&JSTCK_Data[dwIntf];
}
/**************************************************************************
* driver_close
*/
LRESULT driver_close(DWORD_PTR dwDevID)
{
WINE_JSTCK* jstck = JSTCK_drvGet(dwDevID);
if (jstck == NULL)
return 0;
jstck->in_use = FALSE;
if (jstck->dev > 0)
{
close(jstck->dev);
jstck->dev = 0;
}
return 1;
}
struct js_status
{
int buttons;
int x;
int y;
};
/**************************************************************************
* JSTCK_OpenDevice [internal]
*/
static int JSTCK_OpenDevice(WINE_JSTCK* jstick)
{
char buf[20];
int flags, fd, found_ix, i;
static DWORD last_attempt;
DWORD now;
if (jstick->dev > 0)
return jstick->dev;
now = GetTickCount();
if (now - last_attempt < 2000)
return -1;
last_attempt = now;
flags = O_RDONLY | O_NONBLOCK;
/* The first joystick may not be at /dev/input/js0, find the correct
* first or second device. For example the driver for XBOX 360 wireless
* receiver creates entries starting at 20.
*/
for (found_ix = i = 0; i < MAXJOYSTICK; i++) {
sprintf(buf, JOYDEV_NEW, i);
if ((fd = open(buf, flags)) < 0) {
sprintf(buf, JOYDEV_OLD, i);
if ((fd = open(buf, flags)) < 0)
continue;
}
if (found_ix++ == jstick->joyIntf)
{
TRACE("Found joystick[%d] at %s\n", jstick->joyIntf, buf);
jstick->dev = fd;
last_attempt = 0;
break;
}
close(fd);
}
if (jstick->dev > 0)
ioctl(jstick->dev, JSIOCGAXMAP, jstick->axesMap);
return jstick->dev;
}
/**************************************************************************
* JoyGetDevCaps [MMSYSTEM.102]
*/
LRESULT driver_joyGetDevCaps(DWORD_PTR dwDevID, LPJOYCAPSW lpCaps, DWORD dwSize)
{
WINE_JSTCK* jstck;
int dev;
char nrOfAxes;
char nrOfButtons;
char identString[MAXPNAMELEN];
int i;
int driverVersion;
if ((jstck = JSTCK_drvGet(dwDevID)) == NULL)
return MMSYSERR_NODRIVER;
if ((dev = JSTCK_OpenDevice(jstck)) < 0) return JOYERR_PARMS;
ioctl(dev, JSIOCGAXES, &nrOfAxes);
ioctl(dev, JSIOCGBUTTONS, &nrOfButtons);
ioctl(dev, JSIOCGVERSION, &driverVersion);
ioctl(dev, JSIOCGNAME(sizeof(identString)), identString);
TRACE("Driver: 0x%06x, Name: %s, #Axes: %d, #Buttons: %d\n",
driverVersion, identString, nrOfAxes, nrOfButtons);
lpCaps->wMid = MM_MICROSOFT;
lpCaps->wPid = MM_PC_JOYSTICK;
MultiByteToWideChar(CP_UNIXCP, 0, identString, -1, lpCaps->szPname, MAXPNAMELEN);
lpCaps->szPname[MAXPNAMELEN-1] = '\0';
lpCaps->wXmin = 0;
lpCaps->wXmax = 0xFFFF;
lpCaps->wYmin = 0;
lpCaps->wYmax = 0xFFFF;
lpCaps->wZmin = 0;
lpCaps->wZmax = (nrOfAxes >= 3) ? 0xFFFF : 0;
#ifdef BODGE_THE_HAT
/* Half-Life won't allow you to map an axis event to things like
"next weapon" and "use". Linux reports the hat on my stick as
axis U and V. So, IFF BODGE_THE_HAT is defined, lie through our
teeth and say we have 32 buttons, and we will map the axes to
the high buttons. Really, perhaps this should be a registry entry,
or even a parameter to the Linux joystick driver (which would completely
remove the need for this.)
*/
lpCaps->wNumButtons = 32;
#else
lpCaps->wNumButtons = nrOfButtons;
#endif
if (dwSize == sizeof(JOYCAPSW)) {
/* complete 95 structure */
lpCaps->wRmin = 0;
lpCaps->wRmax = 0xFFFF;
lpCaps->wUmin = 0;
lpCaps->wUmax = 0xFFFF;
lpCaps->wVmin = 0;
lpCaps->wVmax = 0xFFFF;
lpCaps->wMaxAxes = 6; /* same as MS Joystick Driver */
lpCaps->wNumAxes = 0; /* nr of axes in use */
lpCaps->wMaxButtons = 32; /* same as MS Joystick Driver */
lpCaps->szRegKey[0] = 0;
lpCaps->szOEMVxD[0] = 0;
lpCaps->wCaps = 0;
for (i = 0; i < nrOfAxes; i++) {
switch (jstck->axesMap[i]) {
case 0: /* X */
case 1: /* Y */
case 8: /* Wheel */
case 9: /* Gas */
lpCaps->wNumAxes++;
break;
case 2: /* Z */
case 6: /* Throttle */
case 10: /* Brake */
lpCaps->wNumAxes++;
lpCaps->wCaps |= JOYCAPS_HASZ;
break;
case 5: /* Rz */
case 7: /* Rudder */
lpCaps->wNumAxes++;
lpCaps->wCaps |= JOYCAPS_HASR;
break;
case 3: /* Rx */
lpCaps->wNumAxes++;
lpCaps->wCaps |= JOYCAPS_HASU;
break;
case 4: /* Ry */
lpCaps->wNumAxes++;
lpCaps->wCaps |= JOYCAPS_HASV;
break;
case 16: /* Hat 0 X */
case 17: /* Hat 0 Y */
lpCaps->wCaps |= JOYCAPS_HASPOV | JOYCAPS_POV4DIR;
/* TODO: JOYCAPS_POVCTS handling */
break;
default:
WARN("Unknown axis %hhu(%u). Skipped.\n", jstck->axesMap[i], i);
}
}
}
return JOYERR_NOERROR;
}
/**************************************************************************
* driver_joyGetPos
*/
LRESULT driver_joyGetPosEx(DWORD_PTR dwDevID, LPJOYINFOEX lpInfo)
{
WINE_JSTCK* jstck;
int dev;
struct js_event ev;
if ((jstck = JSTCK_drvGet(dwDevID)) == NULL)
return MMSYSERR_NODRIVER;
if ((dev = JSTCK_OpenDevice(jstck)) < 0) return JOYERR_PARMS;
while ((read(dev, &ev, sizeof(struct js_event))) > 0) {
if (ev.type == (JS_EVENT_AXIS)) {
switch (jstck->axesMap[ev.number]) {
case 0: /* X */
case 8: /* Wheel */
jstck->x = ev.value;
break;
case 1: /* Y */
case 9: /* Gas */
jstck->y = ev.value;
break;
case 2: /* Z */
case 6: /* Throttle */
case 10: /* Brake */
jstck->z = ev.value;
break;
case 5: /* Rz */
case 7: /* Rudder */
jstck->r = ev.value;
break;
case 3: /* Rx */
jstck->u = ev.value;
break;
case 4: /* Ry */
jstck->v = ev.value;
break;
case 16: /* Hat 0 X */
jstck->pov_x = ev.value;
break;
case 17: /* Hat 0 Y */
jstck->pov_y = ev.value;
break;
default:
FIXME("Unknown joystick event '%d'\n", ev.number);
}
} else if (ev.type == (JS_EVENT_BUTTON)) {
if (ev.value) {
jstck->buttons |= (1 << ev.number);
/* FIXME: what to do for this field when
* multiple buttons are depressed ?
*/
if (lpInfo->dwFlags & JOY_RETURNBUTTONS)
lpInfo->dwButtonNumber = ev.number + 1;
}
else
jstck->buttons &= ~(1 << ev.number);
}
}
/* EAGAIN is returned when the queue is empty */
if (errno != EAGAIN) {
/* FIXME: error should not be ignored */
ERR("Error while reading joystick state (%s)\n", strerror(errno));
}
/* Now, copy the cached values into Window's structure... */
if (lpInfo->dwFlags & JOY_RETURNBUTTONS)
lpInfo->dwButtons = jstck->buttons;
if (lpInfo->dwFlags & JOY_RETURNX)
lpInfo->dwXpos = jstck->x + 32767;
if (lpInfo->dwFlags & JOY_RETURNY)
lpInfo->dwYpos = jstck->y + 32767;
if (lpInfo->dwFlags & JOY_RETURNZ)
lpInfo->dwZpos = jstck->z + 32767;
if (lpInfo->dwFlags & JOY_RETURNR)
lpInfo->dwRpos = jstck->r + 32767;
# ifdef BODGE_THE_HAT
else if (lpInfo->dwFlags & JOY_RETURNBUTTONS)
{
if (jstck->r > 0)
lpInfo->dwButtons |= 1<<7;
else if (jstck->r < 0)
lpInfo->dwButtons |= 1<<8;
}
# endif
if (lpInfo->dwFlags & JOY_RETURNU)
lpInfo->dwUpos = jstck->u + 32767;
# ifdef BODGE_THE_HAT
else if (lpInfo->dwFlags & JOY_RETURNBUTTONS)
{
if (jstck->u > 0)
lpInfo->dwButtons |= 1<<9;
else if (jstck->u < 0)
lpInfo->dwButtons |= 1<<10;
}
# endif
if (lpInfo->dwFlags & JOY_RETURNV)
lpInfo->dwVpos = jstck->v + 32767;
if (lpInfo->dwFlags & JOY_RETURNPOV) {
if (jstck->pov_y > 0) {
if (jstck->pov_x < 0)
lpInfo->dwPOV = 22500; /* SW */
else if (jstck->pov_x > 0)
lpInfo->dwPOV = 13500; /* SE */
else
lpInfo->dwPOV = 18000; /* S, JOY_POVBACKWARD */
} else if (jstck->pov_y < 0) {
if (jstck->pov_x < 0)
lpInfo->dwPOV = 31500; /* NW */
else if (jstck->pov_x > 0)
lpInfo->dwPOV = 4500; /* NE */
else
lpInfo->dwPOV = 0; /* N, JOY_POVFORWARD */
} else if (jstck->pov_x < 0)
lpInfo->dwPOV = 27000; /* W, JOY_POVLEFT */
else if (jstck->pov_x > 0)
lpInfo->dwPOV = 9000; /* E, JOY_POVRIGHT */
else
lpInfo->dwPOV = JOY_POVCENTERED; /* Center */
}
TRACE("x: %d, y: %d, z: %d, r: %d, u: %d, v: %d, buttons: 0x%04x, flags: 0x%04x (fd %d)\n",
lpInfo->dwXpos, lpInfo->dwYpos, lpInfo->dwZpos,
lpInfo->dwRpos, lpInfo->dwUpos, lpInfo->dwVpos,
lpInfo->dwButtons, lpInfo->dwFlags, dev
);
return JOYERR_NOERROR;
}
/**************************************************************************
* driver_joyGetPos
*/
LRESULT driver_joyGetPos(DWORD_PTR dwDevID, LPJOYINFO lpInfo)
{
JOYINFOEX ji;
LONG ret;
memset(&ji, 0, sizeof(ji));
ji.dwSize = sizeof(ji);
ji.dwFlags = JOY_RETURNX | JOY_RETURNY | JOY_RETURNZ | JOY_RETURNBUTTONS;
ret = driver_joyGetPosEx(dwDevID, &ji);
if (ret == JOYERR_NOERROR) {
lpInfo->wXpos = ji.dwXpos;
lpInfo->wYpos = ji.dwYpos;
lpInfo->wZpos = ji.dwZpos;
lpInfo->wButtons = ji.dwButtons;
}
return ret;
}
#endif /* HAVE_LINUX_JOYSTICK_H */
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