Start adding Linux Udev joypad input.

This commit is contained in:
Themaister 2013-09-25 19:32:18 +02:00
parent 50cca385e6
commit e5d0b09df5
5 changed files with 505 additions and 5 deletions

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@ -182,6 +182,7 @@ endif
ifeq ($(HAVE_SDL), 1)
OBJ += gfx/sdl_gfx.o input/sdl_input.o input/sdl_joypad.o audio/sdl_audio.o
JOYCONFIG_OBJ += input/sdl_joypad.o
JOYCONFIG_LIBS += $(SDL_LIBS)
DEFINES += $(SDL_CFLAGS) $(BSD_LOCAL_INC)
LIBS += $(SDL_LIBS)
endif
@ -316,11 +317,19 @@ ifeq ($(HAVE_PYTHON), 1)
OBJ += gfx/py_state/py_state.o
endif
ifeq ($(HAVE_UDEV), 1)
DEFINES += $(UDEV_CFLAGS)
LIBS += $(UDEV_LIBS)
JOYCONFIG_LIBS += $(UDEV_LIBS)
OBJ += input/udev_joypad.o
JOYCONFIG_OBJ += tools/udev_joypad.o
endif
ifeq ($(HAVE_NEON),1)
OBJ += audio/sinc_neon.o
OBJ += audio/sinc_neon.o
# When compiled without this, tries to attempt to compile sinc lerp,
# which will error out
DEFINES += -DSINC_LOWER_QUALITY -DHAVE_NEON
DEFINES += -DSINC_LOWER_QUALITY -DHAVE_NEON
endif
OBJ += audio/utils.o
@ -376,9 +385,9 @@ retroarch: $(OBJ)
tools/retroarch-joyconfig: $(JOYCONFIG_OBJ)
@$(if $(Q), $(shell echo echo LD $@),)
ifeq ($(CXX_BUILD), 1)
$(Q)$(CXX) -o $@ $(JOYCONFIG_OBJ) $(SDL_LIBS) $(LDFLAGS) $(LIBRARY_DIRS)
$(Q)$(CXX) -o $@ $(JOYCONFIG_OBJ) $(JOYCONFIG_LIBS) $(LDFLAGS) $(LIBRARY_DIRS)
else
$(Q)$(CC) -o $@ $(JOYCONFIG_OBJ) $(SDL_LIBS) $(LDFLAGS) $(LIBRARY_DIRS)
$(Q)$(CC) -o $@ $(JOYCONFIG_OBJ) $(JOYCONFIG_LIBS) $(LDFLAGS) $(LIBRARY_DIRS)
endif
tools/retrolaunch/retrolaunch: $(RETROLAUNCH_OBJ)
@ -393,6 +402,10 @@ tools/linuxraw_joypad.o: input/linuxraw_joypad.c
@$(if $(Q), $(shell echo echo CC $<),)
$(Q)$(CC) $(CFLAGS) $(DEFINES) -DIS_JOYCONFIG -c -o $@ $<
tools/udev_joypad.o: input/udev_joypad.c
@$(if $(Q), $(shell echo echo CC $<),)
$(Q)$(CC) $(CFLAGS) $(DEFINES) -DIS_JOYCONFIG -c -o $@ $<
tools/input_common_launch.o: input/input_common.c
@$(if $(Q), $(shell echo echo CC $<),)
$(Q)$(CC) $(CFLAGS) $(DEFINES) -DIS_RETROLAUNCH -c -o $@ $<

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@ -48,6 +48,9 @@ static const rarch_joypad_driver_t *joypad_drivers[] = {
#ifdef HAVE_DINPUT
&dinput_joypad,
#endif
#ifdef HAVE_UDEV
&udev_joypad,
#endif
#if defined(__linux) && !defined(ANDROID)
&linuxraw_joypad,
#endif

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@ -93,6 +93,7 @@ const char *input_joypad_name(const rarch_joypad_driver_t *driver, unsigned joyp
extern const rarch_joypad_driver_t dinput_joypad;
extern const rarch_joypad_driver_t linuxraw_joypad;
extern const rarch_joypad_driver_t udev_joypad;
extern const rarch_joypad_driver_t winxinput_joypad; // Named as such to avoid confusion with xb1/360 port code
extern const rarch_joypad_driver_t sdl_joypad;

481
input/udev_joypad.c Normal file
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@ -0,0 +1,481 @@
/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2013 - Hans-Kristian Arntzen
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "input_common.h"
#include "../general.h"
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <limits.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <libudev.h>
#include <linux/types.h>
#include <linux/joystick.h>
// Udev/Evdev Linux joypad driver.
// More complex and extremely low level,
// but only Linux driver which can support joypad rumble.
// Uses udev for device detection + hotplug.
//
// Code adapted from SDL 2.0's implementation.
#define NUM_BUTTONS 32
#define NUM_AXES 32
#define NUM_HATS 4
struct udev_joypad
{
int fd;
dev_t device;
// Input state polled
bool buttons[NUM_BUTTONS];
int16_t axes[NUM_AXES];
uint16_t hats[NUM_HATS];
// Maps keycodes -> button/axes
uint8_t button_bind[KEY_MAX];
uint8_t axes_bind[ABS_MAX];
struct input_absinfo absinfo[NUM_AXES];
char ident[256];
};
static struct udev *g_udev;
static struct udev_monitor *g_udev_mon;
static struct udev_joypad g_pads[MAX_PLAYERS];
/*
static bool udev_joypad_init_pad(const char *path, struct udev_joypad *pad)
{
if (pad->fd >= 0)
return false;
// Device can have just been created, but not made accessible (yet).
// IN_ATTRIB will signal when permissions change.
if (access(path, R_OK) < 0)
return false;
pad->fd = open(path, O_RDONLY | O_NONBLOCK);
*pad->ident = '\0';
if (pad->fd >= 0)
{
if (ioctl(pad->fd, JSIOCGNAME(sizeof(g_settings.input.device_names[0])), pad->ident) >= 0)
{
RARCH_LOG("[Joypad]: Found pad: %s on %s.\n", pad->ident, path);
if (g_hotplug)
{
char msg[512];
snprintf(msg, sizeof(msg), "Joypad #%u (%s) connected.", (unsigned)(pad - g_pads), pad->ident);
#ifndef IS_JOYCONFIG
msg_queue_push(g_extern.msg_queue, msg, 0, 60);
#endif
}
}
else
RARCH_ERR("[Joypad]: Didn't find ident of %s.\n", path);
struct epoll_event event;
event.events = EPOLLIN;
event.data.ptr = pad;
epoll_ctl(g_epoll, EPOLL_CTL_ADD, pad->fd, &event);
return true;
}
else
{
RARCH_ERR("[Joypad]: Failed to open pad %s (error: %s).\n", path, strerror(errno));
return false;
}
}
static void handle_plugged_pad(void)
{
size_t event_size = sizeof(struct inotify_event) + NAME_MAX + 1;
uint8_t *event_buf = (uint8_t*)calloc(1, event_size);
if (!event_buf)
return;
int rc;
while ((rc = read(g_notify, event_buf, event_size)) >= 0)
{
struct inotify_event *event = NULL;
// Can read multiple events in one read() call.
for (int i = 0; i < rc; i += event->len + sizeof(struct inotify_event))
{
event = (struct inotify_event*)&event_buf[i];
if (strstr(event->name, "js") != event->name)
continue;
unsigned index = strtoul(event->name + 2, NULL, 0);
if (index >= MAX_PLAYERS)
continue;
if (event->mask & IN_DELETE)
{
if (g_pads[index].fd >= 0)
{
if (g_hotplug)
{
char msg[512];
snprintf(msg, sizeof(msg), "Joypad #%u (%s) disconnected.", index, g_pads[index].ident);
#ifndef IS_JOYCONFIG
msg_queue_push(g_extern.msg_queue, msg, 0, 60);
#endif
}
RARCH_LOG("[Joypad]: Joypad %s disconnected.\n", g_pads[index].ident);
close(g_pads[index].fd);
memset(g_pads[index].buttons, 0, sizeof(g_pads[index].buttons));
memset(g_pads[index].axes, 0, sizeof(g_pads[index].axes));
g_pads[index].fd = -1;
*g_pads[index].ident = '\0';
input_config_autoconfigure_joypad(index, NULL, NULL);
}
}
// Sometimes, device will be created before acess to it is established.
else if (event->mask & (IN_CREATE | IN_ATTRIB))
{
char path[PATH_MAX];
snprintf(path, sizeof(path), "/dev/input/%s", event->name);
bool ret = udev_joypad_init_pad(path, &g_pads[index]);
if (*g_pads[index].ident && ret)
input_config_autoconfigure_joypad(index, g_pads[index].ident, "udev");
}
}
}
free(event_buf);
}
*/
static void handle_hat(struct udev_joypad *pad,
unsigned hat, unsigned axis, int value)
{
}
static int16_t compute_axis(const struct input_absinfo *info, int value)
{
return 0;
}
static void poll_pad(unsigned i)
{
struct udev_joypad *pad = &g_pads[i];
if (pad->fd < 0)
return;
int len;
struct input_event events[32];
while ((len = read(pad->fd, events, sizeof(events))) > 0)
{
len /= sizeof(*events);
for (int i = 0; i < len; i++)
{
int code = events[i].code;
switch (events[i].type)
{
case EV_KEY:
if (code >= BTN_MISC)
pad->buttons[pad->button_bind[code]] = events[i].value;
break;
case EV_ABS:
if (code >= ABS_MISC)
break;
switch (code)
{
case ABS_HAT0X:
case ABS_HAT0Y:
case ABS_HAT1X:
case ABS_HAT1Y:
case ABS_HAT2X:
case ABS_HAT2Y:
case ABS_HAT3X:
case ABS_HAT3Y:
{
code -= ABS_HAT0X;
handle_hat(pad, code / 2, code % 2, events[i].value);
break;
}
default:
{
unsigned axis = pad->axes_bind[code];
pad->axes[axis] = compute_axis(&pad->absinfo[axis], events[i].value);
break;
}
}
break;
default:
break;
}
}
}
}
static void udev_joypad_poll(void)
{
for (unsigned i = 0; i < MAX_PLAYERS; i++)
poll_pad(i);
}
#define test_bit(nr, addr) \
(((1UL << ((nr) % (sizeof(long) * CHAR_BIT))) & ((addr)[(nr) / (sizeof(long) * CHAR_BIT)])) != 0)
#define NBITS(x) ((((x) - 1) / (sizeof(long) * CHAR_BIT)) + 1)
static int open_joystick(const char *path)
{
int fd = open(path, O_RDONLY | O_NONBLOCK);
if (fd < 0)
return fd;
unsigned long evbit[NBITS(EV_MAX)] = {0};
unsigned long keybit[NBITS(KEY_MAX)] = {0};
unsigned long absbit[NBITS(ABS_MAX)] = {0};
if ((ioctl(fd, EVIOCGBIT(0, sizeof(evbit)), evbit) < 0) ||
(ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) < 0) ||
(ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) < 0))
return false;
// Has to at least support EV_KEY interface.
if (!test_bit(EV_KEY, evbit))
return false;
return fd;
}
static int find_vacant_pad(void)
{
for (unsigned i = 0; i < MAX_PLAYERS; i++)
if (g_pads[i].fd < 0)
return i;
return -1;
}
static void free_pad(unsigned pad)
{
if (g_pads[pad].fd >= 0)
close(g_pads[pad].fd);
memset(&g_pads[pad], 0, sizeof(g_pads[pad]));
g_pads[pad].fd = -1;
}
static bool add_pad(unsigned i, int fd)
{
struct udev_joypad *pad = &g_pads[i];
if (ioctl(fd, EVIOCGNAME(sizeof(pad->ident)), pad->ident) < 0)
return false;
RARCH_LOG("[udev]: Found pad: %s on.\n", pad->ident);
struct stat st;
if (fstat(fd, &st) < 0)
return false;
unsigned long keybit[NBITS(KEY_MAX)] = {0};
unsigned long absbit[NBITS(ABS_MAX)] = {0};
if ((ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybit)), keybit) < 0) ||
(ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbit)), absbit) < 0))
return false;
// Go through all possible keycodes, check if they are used,
// and map them to button/axes/hat indices.
unsigned buttons = 0;
unsigned axes = 0;
for (int i = BTN_JOYSTICK; i < KEY_MAX && buttons < NUM_BUTTONS; i++)
if (test_bit(i, keybit))
pad->button_bind[i] = buttons++;
for (int i = BTN_MISC; i < BTN_JOYSTICK; i++)
if (test_bit(i, keybit))
pad->button_bind[i] = buttons++;
for (int i = 0; i < ABS_MISC && axes < NUM_AXES; i++)
{
// Skip hats for now.
if (i == ABS_HAT0X)
{
i = ABS_HAT3Y;
continue;
}
if (test_bit(i, absbit))
{
struct input_absinfo *abs = &pad->absinfo[axes];
if (ioctl(fd, EVIOCGABS(i), abs) < 0)
continue;
pad->axes_bind[i] = axes++;
}
}
pad->device = st.st_rdev;
pad->fd = fd;
return true;
}
static void check_device(const char *path)
{
struct stat st;
if (stat(path, &st) < 0)
return;
for (unsigned i = 0; i < MAX_PLAYERS; i++)
if (st.st_rdev == g_pads[i].device)
return;
int fd = open_joystick(path);
if (fd < 0)
return;
int pad = find_vacant_pad();
if (pad < 0)
{
close(fd);
return;
}
if (add_pad(pad, fd))
{
// Autodetect.
}
else
close(fd);
}
static void udev_joypad_destroy(void)
{
for (unsigned i = 0; i < MAX_PLAYERS; i++)
free_pad(i);
if (g_udev_mon)
udev_monitor_unref(g_udev_mon);
g_udev_mon = NULL;
if (g_udev)
udev_unref(g_udev);
g_udev = NULL;
}
static bool udev_joypad_init(void)
{
for (unsigned i = 0; i < MAX_PLAYERS; i++)
free_pad(i);
struct udev_list_entry *devs = NULL;
struct udev_list_entry *item = NULL;
g_udev = udev_new();
if (!g_udev)
return false;
g_udev_mon = udev_monitor_new_from_netlink(g_udev, "udev");
if (g_udev_mon)
{
udev_monitor_filter_add_match_subsystem_devtype(g_udev_mon, "input", NULL);
udev_monitor_enable_receiving(g_udev_mon);
}
struct udev_enumerate *enumerate = udev_enumerate_new(g_udev);
if (!enumerate)
goto error;
udev_enumerate_add_match_property(enumerate, "ID_INPUT_JOYSTICK", "1");
udev_enumerate_scan_devices(enumerate);
devs = udev_enumerate_get_list_entry(enumerate);
for (struct udev_list_entry *item = devs; item; item = udev_list_entry_get_next(item))
{
const char *name = udev_list_entry_get_name(item);
struct udev_device *dev = udev_device_new_from_syspath(g_udev, name);
check_device(udev_device_get_devnode(dev));
udev_device_unref(dev);
}
udev_enumerate_unref(enumerate);
return true;
error:
if (enumerate)
udev_enumerate_unref(enumerate);
udev_joypad_destroy();
return false;
}
static bool udev_joypad_button(unsigned port, uint16_t joykey)
{
const struct udev_joypad *pad = &g_pads[port];
return joykey < NUM_BUTTONS && pad->buttons[joykey];
}
static int16_t udev_joypad_axis(unsigned port, uint32_t joyaxis)
{
if (joyaxis == AXIS_NONE)
return 0;
const struct udev_joypad *pad = &g_pads[port];
int16_t val = 0;
if (AXIS_NEG_GET(joyaxis) < NUM_AXES)
{
val = pad->axes[AXIS_NEG_GET(joyaxis)];
if (val > 0)
val = 0;
// Kernel returns values in range [-0x7fff, 0x7fff].
}
else if (AXIS_POS_GET(joyaxis) < NUM_AXES)
{
val = pad->axes[AXIS_POS_GET(joyaxis)];
if (val < 0)
val = 0;
}
return val;
}
static bool udev_joypad_query_pad(unsigned pad)
{
return pad < MAX_PLAYERS && g_pads[pad].fd >= 0;
}
static const char *udev_joypad_name(unsigned pad)
{
if (pad >= MAX_PLAYERS)
return NULL;
return *g_pads[pad].ident ? g_pads[pad].ident : NULL;
}
const rarch_joypad_driver_t udev_joypad = {
udev_joypad_init,
udev_joypad_query_pad,
udev_joypad_destroy,
udev_joypad_button,
udev_joypad_axis,
udev_joypad_poll,
udev_joypad_name,
"udev",
};

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@ -245,6 +245,8 @@ else
HAVE_XVIDEO='no'
fi
check_pkgconf UDEV libudev
check_lib STRL -lc strlcpy
check_pkgconf PYTHON python3
@ -255,6 +257,6 @@ add_define_make OS "$OS"
# Creates config.mk and config.h.
add_define_make GLOBAL_CONFIG_DIR "$GLOBAL_CONFIG_DIR"
VARS="RGUI ALSA OSS OSS_BSD OSS_LIB AL RSOUND ROAR JACK COREAUDIO PULSE SDL OPENGL GLES VG EGL KMS GBM DRM DYLIB GETOPT_LONG THREADS CG LIBXML2 SDL_IMAGE ZLIB DYNAMIC FFMPEG AVCODEC AVFORMAT AVUTIL SWSCALE FREETYPE XVIDEO X11 XEXT XF86VM XINERAMA NETPLAY NETWORK_CMD STDIN_CMD COMMAND SOCKET_LEGACY FBO STRL PYTHON FFMPEG_ALLOC_CONTEXT3 FFMPEG_AVCODEC_OPEN2 FFMPEG_AVIO_OPEN FFMPEG_AVFORMAT_WRITE_HEADER FFMPEG_AVFORMAT_NEW_STREAM FFMPEG_AVCODEC_ENCODE_AUDIO2 FFMPEG_AVCODEC_ENCODE_VIDEO2 BSV_MOVIE VIDEOCORE NEON FLOATHARD FLOATSOFTFP"
VARS="RGUI ALSA OSS OSS_BSD OSS_LIB AL RSOUND ROAR JACK COREAUDIO PULSE SDL OPENGL GLES VG EGL KMS GBM DRM DYLIB GETOPT_LONG THREADS CG LIBXML2 SDL_IMAGE ZLIB DYNAMIC FFMPEG AVCODEC AVFORMAT AVUTIL SWSCALE FREETYPE XVIDEO X11 XEXT XF86VM XINERAMA NETPLAY NETWORK_CMD STDIN_CMD COMMAND SOCKET_LEGACY FBO STRL PYTHON FFMPEG_ALLOC_CONTEXT3 FFMPEG_AVCODEC_OPEN2 FFMPEG_AVIO_OPEN FFMPEG_AVFORMAT_WRITE_HEADER FFMPEG_AVFORMAT_NEW_STREAM FFMPEG_AVCODEC_ENCODE_AUDIO2 FFMPEG_AVCODEC_ENCODE_VIDEO2 BSV_MOVIE VIDEOCORE NEON FLOATHARD FLOATSOFTFP UDEV"
create_config_make config.mk $VARS
create_config_header config.h $VARS