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xserver/hw/kdrive/linux/evdev.c

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/*
* Copyright © 2004 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.
*/
#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#include <errno.h>
#include <linux/input.h>
#include <X11/X.h>
#include <X11/Xproto.h>
#include <X11/Xpoll.h>
#include "inputstr.h"
#include "scrnintstr.h"
#include "kdrive.h"
#define NUM_EVENTS 128
#define ABS_UNSET -65535
#define BITS_PER_LONG (sizeof(long) * 8)
#define NBITS(x) ((((x)-1)/BITS_PER_LONG)+1)
#define ISBITSET(x,y) ((x)[LONG(y)] & BIT(y))
#define OFF(x) ((x)%BITS_PER_LONG)
#define LONG(x) ((x)/BITS_PER_LONG)
#define BIT(x) (1 << OFF(x))
typedef struct _kevdev {
/* current device state */
int rel[REL_MAX + 1];
int abs[ABS_MAX + 1];
int prevabs[ABS_MAX + 1];
long key[NBITS(KEY_MAX + 1)];
/* supported device info */
long relbits[NBITS(REL_MAX + 1)];
long absbits[NBITS(ABS_MAX + 1)];
long keybits[NBITS(KEY_MAX + 1)];
struct input_absinfo absinfo[ABS_MAX + 1];
int max_rel;
int max_abs;
int fd;
} Kevdev;
static void
EvdevPtrBtn (KdPointerInfo *pi, struct input_event *ev)
{
int flags = KD_MOUSE_DELTA | pi->buttonState;
if (ev->code >= BTN_MOUSE && ev->code < BTN_JOYSTICK) {
switch (ev->code) {
case BTN_LEFT:
if (ev->value == 1)
flags |= KD_BUTTON_1;
else
flags &= ~KD_BUTTON_1;
break;
case BTN_MIDDLE:
if (ev->value == 1)
flags |= KD_BUTTON_2;
else
flags &= ~KD_BUTTON_2;
break;
case BTN_RIGHT:
if (ev->value == 1)
flags |= KD_BUTTON_3;
else
flags &= ~KD_BUTTON_3;
break;
default:
/* Unknow button */
break;
}
KdEnqueuePointerEvent (pi, flags, 0, 0, 0);
}
}
static void
EvdevPtrMotion (KdPointerInfo *pi, struct input_event *ev)
{
Kevdev *ke = pi->driverPrivate;
int i;
int flags = KD_MOUSE_DELTA | pi->buttonState;
for (i = 0; i <= ke->max_rel; i++)
if (ke->rel[i])
{
int a;
for (a = 0; a <= ke->max_rel; a++)
{
if (ISBITSET (ke->relbits, a))
{
if (a == 0)
KdEnqueuePointerEvent(pi, flags, ke->rel[a], 0, 0);
else if (a == 1)
KdEnqueuePointerEvent(pi, flags, 0, ke->rel[a], 0);
}
ke->rel[a] = 0;
}
break;
}
for (i = 0; i < ke->max_abs; i++)
if (ke->abs[i] != ke->prevabs[i])
{
int a;
ErrorF ("abs");
for (a = 0; a <= ke->max_abs; a++)
{
if (ISBITSET (ke->absbits, a))
ErrorF (" %d=%d", a, ke->abs[a]);
ke->prevabs[a] = ke->abs[a];
}
ErrorF ("\n");
break;
}
if (ev->code == REL_WHEEL) {
for (i = 0; i < abs (ev->value); i++)
{
if (ev->value > 0)
flags |= KD_BUTTON_4;
else
flags |= KD_BUTTON_5;
KdEnqueuePointerEvent (pi, flags, 0, 0, 0);
if (ev->value > 0)
flags &= ~KD_BUTTON_4;
else
flags &= ~KD_BUTTON_5;
KdEnqueuePointerEvent (pi, flags, 0, 0, 0);
}
}
}
static void
EvdevPtrRead (int evdevPort, void *closure)
{
KdPointerInfo *pi = closure;
Kevdev *ke = pi->driverPrivate;
int i;
struct input_event events[NUM_EVENTS];
int n;
n = read (evdevPort, &events, NUM_EVENTS * sizeof (struct input_event));
if (n <= 0) {
if (errno == ENODEV)
DeleteInputDeviceRequest(pi->dixdev);
return;
}
n /= sizeof (struct input_event);
for (i = 0; i < n; i++)
{
switch (events[i].type) {
case EV_SYN:
break;
case EV_KEY:
EvdevPtrBtn (pi, &events[i]);
break;
case EV_REL:
ke->rel[events[i].code] += events[i].value;
EvdevPtrMotion (pi, &events[i]);
break;
case EV_ABS:
ke->abs[events[i].code] = events[i].value;
EvdevPtrMotion (pi, &events[i]);
break;
}
}
}
char *kdefaultEvdev[] = {
"/dev/input/event0",
"/dev/input/event1",
"/dev/input/event2",
"/dev/input/event3",
};
#define NUM_DEFAULT_EVDEV (sizeof (kdefaultEvdev) / sizeof (kdefaultEvdev[0]))
static Status
EvdevPtrInit (KdPointerInfo *pi)
{
int i;
int fd;
if (!pi->path) {
for (i = 0; i < NUM_DEFAULT_EVDEV; i++) {
fd = open (kdefaultEvdev[i], 2);
if (fd >= 0) {
pi->path = KdSaveString (kdefaultEvdev[i]);
break;
}
}
}
else {
fd = open (pi->path, O_RDWR);
if (fd < 0) {
ErrorF("Failed to open evdev device %s\n", pi->path);
return BadMatch;
}
}
close(fd);
pi->name = KdSaveString("Evdev mouse");
return Success;
}
static Status
EvdevPtrEnable (KdPointerInfo *pi)
{
int fd;
if (!pi || !pi->path)
return BadImplementation;
fd = open(pi->path, 2);
if (fd < 0)
return BadMatch;
unsigned long ev[NBITS(EV_MAX)];
Kevdev *ke;
if (ioctl (fd, EVIOCGBIT(0 /*EV*/, sizeof (ev)), ev) < 0)
{
perror ("EVIOCGBIT 0");
close (fd);
return BadMatch;
}
ke = xcalloc (1, sizeof (Kevdev));
if (!ke)
{
close (fd);
return BadAlloc;
}
if (ISBITSET (ev, EV_KEY))
{
if (ioctl (fd, EVIOCGBIT (EV_KEY, sizeof (ke->keybits)),
ke->keybits) < 0)
{
perror ("EVIOCGBIT EV_KEY");
xfree (ke);
close (fd);
return BadMatch;
}
}
if (ISBITSET (ev, EV_REL))
{
if (ioctl (fd, EVIOCGBIT (EV_REL, sizeof (ke->relbits)),
ke->relbits) < 0)
{
perror ("EVIOCGBIT EV_REL");
xfree (ke);
close (fd);
return BadMatch;
}
for (ke->max_rel = REL_MAX; ke->max_rel >= 0; ke->max_rel--)
if (ISBITSET(ke->relbits, ke->max_rel))
break;
}
if (ISBITSET (ev, EV_ABS))
{
int i;
if (ioctl (fd, EVIOCGBIT (EV_ABS, sizeof (ke->absbits)),
ke->absbits) < 0)
{
perror ("EVIOCGBIT EV_ABS");
xfree (ke);
close (fd);
return BadMatch;
}
for (ke->max_abs = ABS_MAX; ke->max_abs >= 0; ke->max_abs--)
if (ISBITSET(ke->absbits, ke->max_abs))
break;
for (i = 0; i <= ke->max_abs; i++)
{
if (ISBITSET (ke->absbits, i))
if (ioctl (fd, EVIOCGABS(i), &ke->absinfo[i]) < 0)
{
perror ("EVIOCGABS");
break;
}
ke->prevabs[i] = ABS_UNSET;
}
if (i <= ke->max_abs)
{
xfree (ke);
close (fd);
return BadValue;
}
}
if (!KdRegisterFd (fd, EvdevPtrRead, pi)) {
xfree (ke);
close (fd);
return BadAlloc;
}
pi->driverPrivate = ke;
ke->fd = fd;
return Success;
}
static void
EvdevPtrDisable (KdPointerInfo *pi)
{
Kevdev *ke;
ke = pi->driverPrivate;
if (!pi || !pi->driverPrivate)
return;
KdUnregisterFd (pi, ke->fd, TRUE);
xfree (ke);
pi->driverPrivate = 0;
}
static void
EvdevPtrFini (KdPointerInfo *pi)
{
}
/*
* Evdev keyboard functions
*/
static void
readMapping (KdKeyboardInfo *ki)
{
int minScanCode, maxScanCode;
if (!ki)
return;
minScanCode = 0;
maxScanCode = 193;
ki->keySyms.mapWidth = 2;
ki->minScanCode = minScanCode;
ki->maxScanCode = maxScanCode;
}
static void
EvdevKbdRead (int evdevPort, void *closure)
{
KdKeyboardInfo *ki = closure;
struct input_event events[NUM_EVENTS];
int i, n;
n = read (evdevPort, &events, NUM_EVENTS * sizeof (struct input_event));
if (n <= 0) {
if (errno == ENODEV)
DeleteInputDeviceRequest(ki->dixdev);
return;
}
n /= sizeof (struct input_event);
for (i = 0; i < n; i++)
{
if (events[i].type == EV_KEY)
KdEnqueueKeyboardEvent (ki, events[i].code, !events[i].value);
/* FIXME: must implement other types of events
else
ErrorF("Event type (%d) not delivered\n", events[i].type);
*/
}
}
static Status
EvdevKbdInit (KdKeyboardInfo *ki)
{
int fd;
if (!ki->path) {
ErrorF("Couldn't find evdev device path\n");
return BadValue;
}
else {
fd = open (ki->path, O_RDWR);
if (fd < 0) {
ErrorF("Failed to open evdev device %s\n", ki->path);
return BadMatch;
}
}
close (fd);
ki->name = KdSaveString("Evdev keyboard");
readMapping(ki);
return Success;
}
static Status
EvdevKbdEnable (KdKeyboardInfo *ki)
{
unsigned long ev[NBITS(EV_MAX)];
Kevdev *ke;
int fd;
if (!ki || !ki->path)
return BadImplementation;
fd = open(ki->path, O_RDWR);
if (fd < 0)
return BadMatch;
if (ioctl (fd, EVIOCGBIT(0 /*EV*/, sizeof (ev)), ev) < 0) {
perror ("EVIOCGBIT 0");
close (fd);
return BadMatch;
}
ke = xcalloc (1, sizeof (Kevdev));
if (!ke) {
close (fd);
return BadAlloc;
}
if (!KdRegisterFd (fd, EvdevKbdRead, ki)) {
xfree (ke);
close (fd);
return BadAlloc;
}
ki->driverPrivate = ke;
ke->fd = fd;
return Success;
}
static void
EvdevKbdLeds (KdKeyboardInfo *ki, int leds)
{
/* struct input_event event;
Kevdev *ke;
ki->driverPrivate = ke;
memset(&event, 0, sizeof(event));
event.type = EV_LED;
event.code = LED_CAPSL;
event.value = leds & (1 << 0) ? 1 : 0;
write(ke->fd, (char *) &event, sizeof(event));
event.type = EV_LED;
event.code = LED_NUML;
event.value = leds & (1 << 1) ? 1 : 0;
write(ke->fd, (char *) &event, sizeof(event));
event.type = EV_LED;
event.code = LED_SCROLLL;
event.value = leds & (1 << 2) ? 1 : 0;
write(ke->fd, (char *) &event, sizeof(event));
event.type = EV_LED;
event.code = LED_COMPOSE;
event.value = leds & (1 << 3) ? 1 : 0;
write(ke->fd, (char *) &event, sizeof(event));
*/
}
static void
EvdevKbdBell (KdKeyboardInfo *ki, int volume, int frequency, int duration)
{
}
static void
EvdevKbdDisable (KdKeyboardInfo *ki)
{
Kevdev *ke;
ke = ki->driverPrivate;
if (!ki || !ki->driverPrivate)
return;
KdUnregisterFd (ki, ke->fd, TRUE);
xfree (ke);
ki->driverPrivate = 0;
}
static void
EvdevKbdFini (KdKeyboardInfo *ki)
{
}
KdPointerDriver LinuxEvdevMouseDriver = {
"evdev",
EvdevPtrInit,
EvdevPtrEnable,
EvdevPtrDisable,
EvdevPtrFini,
NULL,
};
KdKeyboardDriver LinuxEvdevKeyboardDriver = {
"evdev",
EvdevKbdInit,
EvdevKbdEnable,
EvdevKbdLeds,
EvdevKbdBell,
EvdevKbdDisable,
EvdevKbdFini,
NULL,
};
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