static SDL_bool JS_ConfigJoystick(SDL_Joystick *joystick, int fd)
{
SDL_bool handled;
unsigned char n;
int old_axes, tmp_naxes, tmp_nhats, tmp_nballs;
const char *name;
char *env, env_name[128];
int i;
handled = SDL_FALSE;
/* Default joystick device settings */
if ( ioctl(fd, JSIOCGAXES, &n) < 0 ) {
joystick->naxes = 2;
} else {
joystick->naxes = n;
}
if ( ioctl(fd, JSIOCGBUTTONS, &n) < 0 ) {
joystick->nbuttons = 2;
} else {
joystick->nbuttons = n;
}
name = SDL_SYS_JoystickName(joystick->index);
old_axes = joystick->naxes;
/* Generic analog joystick support */
if ( SDL_strstr(name, "Analog") == name && SDL_strstr(name, "-hat") ) {
if ( SDL_sscanf(name,"Analog %d-axis %*d-button %d-hat",
&tmp_naxes, &tmp_nhats) == 2 ) {
joystick->naxes = tmp_naxes;
joystick->nhats = tmp_nhats;
handled = SDL_TRUE;
}
}
/* Special joystick support */
for ( i=0; i < SDL_arraysize(special_joysticks); ++i ) {
if ( SDL_strcmp(name, special_joysticks[i].name) == 0 ) {
joystick->naxes = special_joysticks[i].naxes;
joystick->nhats = special_joysticks[i].nhats;
joystick->nballs = special_joysticks[i].nballs;
handled = SDL_TRUE;
break;
}
}
/* User environment joystick support */
if ( (env = SDL_getenv("SDL_LINUX_JOYSTICK")) ) {
*env_name = '\0';
if ( *env == '\'' && SDL_sscanf(env, "'%[^']s'", env_name) == 1 )
env += SDL_strlen(env_name)+2;
else if ( SDL_sscanf(env, "%s", env_name) == 1 )
env += SDL_strlen(env_name);
if ( SDL_strcmp(name, env_name) == 0 ) {
if ( SDL_sscanf(env, "%d %d %d", &tmp_naxes, &tmp_nhats,
&tmp_nballs) == 3 ) {
joystick->naxes = tmp_naxes;
joystick->nhats = tmp_nhats;
joystick->nballs = tmp_nballs;
handled = SDL_TRUE;
}
}
}
/* Remap hats and balls */
if (handled) {
if ( joystick->nhats > 0 ) {
if ( allocate_hatdata(joystick) < 0 ) {
joystick->nhats = 0;
}
}
if ( joystick->nballs > 0 ) {
if ( allocate_balldata(joystick) < 0 ) {
joystick->nballs = 0;
}
}
}
return(handled);
}
static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd)
{
int i, t;
unsigned long keybit[40];
unsigned long absbit[40];
unsigned long relbit[40];
/* See if this device uses the new unified event API */
if ( (ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) >= 0) &&
(ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) >= 0) &&
(ioctl(fd, EVIOCGBIT(EV_REL, sizeof(relbit)), relbit) >= 0) ) {
joystick->hwdata->is_hid = SDL_TRUE;
/* Get the number of buttons, axes, and other thingamajigs */
for ( i=BTN_JOYSTICK; i < KEY_MAX; ++i ) {
if ( test_bit(i, keybit) ) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has button: 0x%x\n", i);
#endif
joystick->hwdata->key_map[i-BTN_MISC] =
joystick->nbuttons;
++joystick->nbuttons;
}
}
for ( i=BTN_MISC; i < BTN_JOYSTICK; ++i ) {
if ( test_bit(i, keybit) ) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has button: 0x%x\n", i);
#endif
joystick->hwdata->key_map[i-BTN_MISC] =
joystick->nbuttons;
++joystick->nbuttons;
}
}
for ( i=0; i<ABS_MAX; ++i ) {
/* Skip hats */
if ( i == ABS_HAT0X ) {
i = ABS_HAT3Y;
continue;
}
if ( test_bit(i, absbit) ) {
int values[5];
if ( ioctl(fd, EVIOCGABS(i), values) < 0 )
continue;
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has absolute axis: %x\n", i);
printf("Values = { %d, %d, %d, %d, %d }\n",
values[0], values[1],
values[2], values[3], values[4]);
#endif /* DEBUG_INPUT_EVENTS */
joystick->hwdata->abs_map[i] = joystick->naxes;
if ( values[1] == values[2] ) {
joystick->hwdata->abs_correct[i].used = 0;
} else {
joystick->hwdata->abs_correct[i].used = 1;
joystick->hwdata->abs_correct[i].coef[0] =
(values[2] + values[1]) / 2 - values[4];
joystick->hwdata->abs_correct[i].coef[1] =
(values[2] + values[1]) / 2 + values[4];
t = ((values[2] - values[1]) / 2 - 2 * values[4]);
if ( t != 0 ) {
joystick->hwdata->abs_correct[i].coef[2] = (1 << 29) / t;
} else {
joystick->hwdata->abs_correct[i].coef[2] = 0;
}
}
++joystick->naxes;
}
}
for ( i=ABS_HAT0X; i <= ABS_HAT3Y; i += 2 ) {
if ( test_bit(i, absbit) || test_bit(i+1, absbit) ) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has hat %d\n",(i-ABS_HAT0X)/2);
#endif
++joystick->nhats;
}
}
if ( test_bit(REL_X, relbit) || test_bit(REL_Y, relbit) ) {
++joystick->nballs;
}
/* Allocate data to keep track of these thingamajigs */
if ( joystick->nhats > 0 ) {
if ( allocate_hatdata(joystick) < 0 ) {
joystick->nhats = 0;
}
}
if ( joystick->nballs > 0 ) {
if ( allocate_balldata(joystick) < 0 ) {
joystick->nballs = 0;
}
}
}
return(joystick->hwdata->is_hid);
}
static void
ConfigJoystick(SDL_Joystick * joystick, int fd)
{
int i, t;
unsigned long keybit[NBITS(KEY_MAX)] = { 0 };
unsigned long absbit[NBITS(ABS_MAX)] = { 0 };
unsigned long relbit[NBITS(REL_MAX)] = { 0 };
/* See if this device uses the new unified event API */
if ((ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) >= 0) &&
(ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) >= 0) &&
(ioctl(fd, EVIOCGBIT(EV_REL, sizeof(relbit)), relbit) >= 0)) {
/* Get the number of buttons, axes, and other thingamajigs */
for (i = BTN_JOYSTICK; i < KEY_MAX; ++i) {
if (test_bit(i, keybit)) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has button: 0x%x\n", i);
#endif
joystick->hwdata->key_map[i - BTN_MISC] = joystick->nbuttons;
++joystick->nbuttons;
}
}
for (i = BTN_MISC; i < BTN_JOYSTICK; ++i) {
if (test_bit(i, keybit)) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has button: 0x%x\n", i);
#endif
joystick->hwdata->key_map[i - BTN_MISC] = joystick->nbuttons;
++joystick->nbuttons;
}
}
for (i = 0; i < ABS_MISC; ++i) {
/* Skip hats */
if (i == ABS_HAT0X) {
i = ABS_HAT3Y;
continue;
}
if (test_bit(i, absbit)) {
struct input_absinfo absinfo;
if (ioctl(fd, EVIOCGABS(i), &absinfo) < 0)
continue;
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has absolute axis: %x\n", i);
printf("Values = { %d, %d, %d, %d, %d }\n",
absinfo.value, absinfo.minimum, absinfo.maximum,
absinfo.fuzz, absinfo.flat);
#endif /* DEBUG_INPUT_EVENTS */
joystick->hwdata->abs_map[i] = joystick->naxes;
if (absinfo.minimum == absinfo.maximum) {
joystick->hwdata->abs_correct[i].used = 0;
} else {
joystick->hwdata->abs_correct[i].used = 1;
joystick->hwdata->abs_correct[i].coef[0] =
(absinfo.maximum + absinfo.minimum) - 2 * absinfo.flat;
joystick->hwdata->abs_correct[i].coef[1] =
(absinfo.maximum + absinfo.minimum) + 2 * absinfo.flat;
t = ((absinfo.maximum - absinfo.minimum) - 4 * absinfo.flat);
if (t != 0) {
joystick->hwdata->abs_correct[i].coef[2] =
(1 << 28) / t;
} else {
joystick->hwdata->abs_correct[i].coef[2] = 0;
}
}
++joystick->naxes;
}
}
for (i = ABS_HAT0X; i <= ABS_HAT3Y; i += 2) {
if (test_bit(i, absbit) || test_bit(i + 1, absbit)) {
#ifdef DEBUG_INPUT_EVENTS
printf("Joystick has hat %d\n", (i - ABS_HAT0X) / 2);
#endif
++joystick->nhats;
}
}
if (test_bit(REL_X, relbit) || test_bit(REL_Y, relbit)) {
++joystick->nballs;
}
/* Allocate data to keep track of these thingamajigs */
if (joystick->nhats > 0) {
if (allocate_hatdata(joystick) < 0) {
joystick->nhats = 0;
}
}
if (joystick->nballs > 0) {
if (allocate_balldata(joystick) < 0) {
joystick->nballs = 0;
}
}
}
}
